From 444a52960c0f109daf78e50e2a07d1f0786e2052 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:49 -0500 Subject: saner calling conventions for nfs_fs_mount_common() Allow it to take ERR_PTR() for server and return ERR_CAST() of it in such case. All callers used to open-code that... Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/nfs4super.c | 16 +--------------- fs/nfs/super.c | 11 ++++------- 2 files changed, 5 insertions(+), 22 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 2c9cbade561a..beeaed872e6c 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -110,21 +110,12 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, { struct nfs_mount_info *mount_info = info; struct nfs_server *server; - struct dentry *mntroot = ERR_PTR(-ENOMEM); mount_info->set_security = nfs_set_sb_security; /* Get a volume representation */ server = nfs4_create_server(mount_info, &nfs_v4); - if (IS_ERR(server)) { - mntroot = ERR_CAST(server); - goto out; - } - - mntroot = nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); - -out: - return mntroot; + return nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, @@ -280,11 +271,6 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, /* create a new volume representation */ server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - if (IS_ERR(server)) { - mntroot = ERR_CAST(server); - goto out; - } - mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, &nfs_v4); out: nfs_free_fhandle(mount_info.mntfh); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 8d8d04bb9d64..f074c3773f0e 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1903,9 +1903,6 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, else server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); - if (IS_ERR(server)) - return ERR_CAST(server); - return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); } EXPORT_SYMBOL_GPL(nfs_try_mount); @@ -2666,6 +2663,9 @@ struct dentry *nfs_fs_mount_common(struct nfs_server *server, }; int error; + if (IS_ERR(server)) + return ERR_CAST(server); + if (server->flags & NFS_MOUNT_UNSHARED) compare_super = NULL; @@ -2814,10 +2814,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, /* create a new volume representation */ server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - if (IS_ERR(server)) - mntroot = ERR_CAST(server); - else - mntroot = nfs_fs_mount_common(server, flags, + mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, nfs_mod); dprintk("<-- nfs_xdev_mount() = %ld\n", -- cgit v1.2.3-59-g8ed1b From d0b779d47c92fa17a31cde312d05155941e26651 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:50 -0500 Subject: nfs: stash server into struct nfs_mount_info Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 3 ++- fs/nfs/nfs4super.c | 10 ++++------ fs/nfs/super.c | 19 ++++++++----------- 3 files changed, 14 insertions(+), 18 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 24a65da58aa9..8f4900bd04f7 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -142,6 +142,7 @@ struct nfs_mount_info { int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; struct nfs_clone_mount *cloned; + struct nfs_server *server; struct nfs_fh *mntfh; }; @@ -397,7 +398,7 @@ struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, +struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index beeaed872e6c..e7f2fd1925b1 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -109,13 +109,12 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { struct nfs_mount_info *mount_info = info; - struct nfs_server *server; mount_info->set_security = nfs_set_sb_security; /* Get a volume representation */ - server = nfs4_create_server(mount_info, &nfs_v4); - return nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); + mount_info->server = nfs4_create_server(mount_info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, mount_info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, @@ -260,7 +259,6 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, .set_security = nfs_clone_sb_security, .cloned = raw_data, }; - struct nfs_server *server; struct dentry *mntroot = ERR_PTR(-ENOMEM); dprintk("--> nfs4_referral_get_sb()\n"); @@ -270,8 +268,8 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, goto out; /* create a new volume representation */ - server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, &nfs_v4); + mount_info.server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); + mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, &nfs_v4); out: nfs_free_fhandle(mount_info.mntfh); return mntroot; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index f074c3773f0e..379c7b26051d 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1896,14 +1896,12 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info, struct nfs_subversion *nfs_mod) { - struct nfs_server *server; - if (mount_info->parsed->need_mount) - server = nfs_try_mount_request(mount_info, nfs_mod); + mount_info->server = nfs_try_mount_request(mount_info, nfs_mod); else - server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); - return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); + return nfs_fs_mount_common(flags, dev_name, mount_info, nfs_mod); } EXPORT_SYMBOL_GPL(nfs_try_mount); @@ -2649,20 +2647,21 @@ static void nfs_set_readahead(struct backing_dev_info *bdi, bdi->io_pages = iomax_pages; } -struct dentry *nfs_fs_mount_common(struct nfs_server *server, - int flags, const char *dev_name, +struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct nfs_mount_info *mount_info, struct nfs_subversion *nfs_mod) { struct super_block *s; struct dentry *mntroot = ERR_PTR(-ENOMEM); int (*compare_super)(struct super_block *, void *) = nfs_compare_super; + struct nfs_server *server = mount_info->server; struct nfs_sb_mountdata sb_mntdata = { .mntflags = flags, .server = server, }; int error; + mount_info->server = NULL; if (IS_ERR(server)) return ERR_CAST(server); @@ -2803,7 +2802,6 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, .set_security = nfs_clone_sb_security, .cloned = data, }; - struct nfs_server *server; struct dentry *mntroot = ERR_PTR(-ENOMEM); struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; @@ -2812,10 +2810,9 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, mount_info.mntfh = mount_info.cloned->fh; /* create a new volume representation */ - server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); + mount_info.server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - mntroot = nfs_fs_mount_common(server, flags, - dev_name, &mount_info, nfs_mod); + mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, nfs_mod); dprintk("<-- nfs_xdev_mount() = %ld\n", IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); -- cgit v1.2.3-59-g8ed1b From 7643c12e955740ac08abcd159f4205cf0c3eef4e Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:51 -0500 Subject: nfs: lift setting mount_info from nfs4_remote{,_referral}_mount Do that (fhandle allocation, setting struct server up) in nfs4_referral_mount() and nfs4_try_mount() resp. and pass the server and pointer to mount_info into nfs_do_root_mount() so that nfs4_remote_referral_mount()/nfs_remote_mount() could be merged. Since we are moving stuff from ->mount() instances to the points prior to vfs_kern_mount() that would trigger those, we need to make sure that do_nfs_root_mount() will do the corresponding cleanup itself if it doesn't trigger those ->mount() instances. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/nfs4super.c | 67 ++++++++++++++++++++++++++++-------------------------- 1 file changed, 35 insertions(+), 32 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index e7f2fd1925b1..ac3e8928643d 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -108,32 +108,37 @@ static struct dentry * nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { - struct nfs_mount_info *mount_info = info; - - mount_info->set_security = nfs_set_sb_security; - - /* Get a volume representation */ - mount_info->server = nfs4_create_server(mount_info, &nfs_v4); - return nfs_fs_mount_common(flags, dev_name, mount_info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, - int flags, void *data, const char *hostname) + struct nfs_server *server, int flags, + struct nfs_mount_info *info, + const char *hostname) { struct vfsmount *root_mnt; char *root_devname; size_t len; + if (IS_ERR(server)) + return ERR_CAST(server); + len = strlen(hostname) + 5; root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) + if (root_devname == NULL) { + nfs_free_server(server); return ERR_PTR(-ENOMEM); + } /* Does hostname needs to be enclosed in brackets? */ if (strchr(hostname, ':')) snprintf(root_devname, len, "[%s]:/", hostname); else snprintf(root_devname, len, "%s:/", hostname); - root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); + info->server = server; + root_mnt = vfs_kern_mount(fs_type, flags, root_devname, info); + if (info->server) + nfs_free_server(info->server); + info->server = NULL; kfree(root_devname); return root_mnt; } @@ -234,11 +239,15 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct dentry *res; struct nfs_parsed_mount_data *data = mount_info->parsed; + mount_info->set_security = nfs_set_sb_security; + dfprintk(MOUNT, "--> nfs4_try_mount()\n"); export_path = data->nfs_server.export_path; data->nfs_server.export_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, mount_info, + root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, + nfs4_create_server(mount_info, &nfs_v4), + flags, mount_info, data->nfs_server.hostname); data->nfs_server.export_path = export_path; @@ -254,25 +263,7 @@ static struct dentry * nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, - .set_security = nfs_clone_sb_security, - .cloned = raw_data, - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - - dprintk("--> nfs4_referral_get_sb()\n"); - - mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.cloned == NULL || mount_info.mntfh == NULL) - goto out; - - /* create a new volume representation */ - mount_info.server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, &nfs_v4); -out: - nfs_free_fhandle(mount_info.mntfh); - return mntroot; + return nfs_fs_mount_common(flags, dev_name, raw_data, &nfs_v4); } /* @@ -282,23 +273,35 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; + struct nfs_mount_info mount_info = { + .fill_super = nfs_fill_super, + .set_security = nfs_clone_sb_security, + .cloned = data, + }; char *export_path; struct vfsmount *root_mnt; struct dentry *res; dprintk("--> nfs4_referral_mount()\n"); + mount_info.mntfh = nfs_alloc_fhandle(); + if (!mount_info.mntfh) + return ERR_PTR(-ENOMEM); + export_path = data->mnt_path; data->mnt_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, - flags, data, data->hostname); + nfs4_create_referral_server(mount_info.cloned, + mount_info.mntfh), + flags, &mount_info, data->hostname); data->mnt_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), IS_ERR(res) ? " [error]" : ""); + + nfs_free_fhandle(mount_info.mntfh); return res; } -- cgit v1.2.3-59-g8ed1b From 15a9c4eff67298af0b6c5976ede86afa1bcf780a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:52 -0500 Subject: nfs: fold nfs4_remote_fs_type and nfs4_remote_referral_fs_type They are identical now. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/nfs4super.c | 26 ++++---------------------- 1 file changed, 4 insertions(+), 22 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index ac3e8928643d..54dbb4561ccc 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -22,8 +22,6 @@ static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); -static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); static struct file_system_type nfs4_remote_fs_type = { .owner = THIS_MODULE, @@ -33,14 +31,6 @@ static struct file_system_type nfs4_remote_fs_type = { .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; -static struct file_system_type nfs4_remote_referral_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_remote_referral_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; - struct file_system_type nfs4_referral_fs_type = { .owner = THIS_MODULE, .name = "nfs4", @@ -111,8 +101,7 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } -static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, - struct nfs_server *server, int flags, +static struct vfsmount *nfs_do_root_mount(struct nfs_server *server, int flags, struct nfs_mount_info *info, const char *hostname) { @@ -135,7 +124,7 @@ static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, else snprintf(root_devname, len, "%s:/", hostname); info->server = server; - root_mnt = vfs_kern_mount(fs_type, flags, root_devname, info); + root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); if (info->server) nfs_free_server(info->server); info->server = NULL; @@ -245,7 +234,7 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, export_path = data->nfs_server.export_path; data->nfs_server.export_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, + root_mnt = nfs_do_root_mount( nfs4_create_server(mount_info, &nfs_v4), flags, mount_info, data->nfs_server.hostname); @@ -259,13 +248,6 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, return res; } -static struct dentry * -nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - return nfs_fs_mount_common(flags, dev_name, raw_data, &nfs_v4); -} - /* * Create an NFS4 server record on referral traversal */ @@ -290,7 +272,7 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, export_path = data->mnt_path; data->mnt_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, + root_mnt = nfs_do_root_mount( nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh), flags, &mount_info, data->hostname); -- cgit v1.2.3-59-g8ed1b From 6654f8e24668c18bfd30a0430d3d94e8c168d8a1 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:53 -0500 Subject: nfs: don't bother setting/restoring export_path around do_nfs_root_mount() nothing in it will be looking at that thing anyway Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/nfs4super.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 54dbb4561ccc..8146edf4ce3a 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -233,12 +233,10 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, dfprintk(MOUNT, "--> nfs4_try_mount()\n"); export_path = data->nfs_server.export_path; - data->nfs_server.export_path = "/"; root_mnt = nfs_do_root_mount( nfs4_create_server(mount_info, &nfs_v4), flags, mount_info, data->nfs_server.hostname); - data->nfs_server.export_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); @@ -271,12 +269,10 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, return ERR_PTR(-ENOMEM); export_path = data->mnt_path; - data->mnt_path = "/"; root_mnt = nfs_do_root_mount( nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh), flags, &mount_info, data->hostname); - data->mnt_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", -- cgit v1.2.3-59-g8ed1b From 4e357761bd44bbba3c3af226c2cc216beff0935c Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:54 -0500 Subject: nfs4: fold nfs_do_root_mount/nfs_follow_remote_path Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/nfs4super.c | 88 +++++++++++++++++++++++------------------------------- 1 file changed, 37 insertions(+), 51 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 8146edf4ce3a..c489942b9069 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -101,37 +101,6 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags, return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } -static struct vfsmount *nfs_do_root_mount(struct nfs_server *server, int flags, - struct nfs_mount_info *info, - const char *hostname) -{ - struct vfsmount *root_mnt; - char *root_devname; - size_t len; - - if (IS_ERR(server)) - return ERR_CAST(server); - - len = strlen(hostname) + 5; - root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) { - nfs_free_server(server); - return ERR_PTR(-ENOMEM); - } - /* Does hostname needs to be enclosed in brackets? */ - if (strchr(hostname, ':')) - snprintf(root_devname, len, "[%s]:/", hostname); - else - snprintf(root_devname, len, "%s:/", hostname); - info->server = server; - root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); - if (info->server) - nfs_free_server(info->server); - info->server = NULL; - kfree(root_devname); - return root_mnt; -} - struct nfs_referral_count { struct list_head list; const struct task_struct *task; @@ -198,11 +167,38 @@ static void nfs_referral_loop_unprotect(void) kfree(p); } -static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt, - const char *export_path) +static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, + struct nfs_mount_info *info, + const char *hostname, + const char *export_path) { + struct vfsmount *root_mnt; struct dentry *dentry; + char *root_devname; int err; + size_t len; + + if (IS_ERR(server)) + return ERR_CAST(server); + + len = strlen(hostname) + 5; + root_devname = kmalloc(len, GFP_KERNEL); + if (root_devname == NULL) { + nfs_free_server(server); + return ERR_PTR(-ENOMEM); + } + + /* Does hostname needs to be enclosed in brackets? */ + if (strchr(hostname, ':')) + snprintf(root_devname, len, "[%s]:/", hostname); + else + snprintf(root_devname, len, "%s:/", hostname); + info->server = server; + root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); + if (info->server) + nfs_free_server(info->server); + info->server = NULL; + kfree(root_devname); if (IS_ERR(root_mnt)) return ERR_CAST(root_mnt); @@ -223,22 +219,17 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info, struct nfs_subversion *nfs_mod) { - char *export_path; - struct vfsmount *root_mnt; - struct dentry *res; struct nfs_parsed_mount_data *data = mount_info->parsed; + struct dentry *res; mount_info->set_security = nfs_set_sb_security; dfprintk(MOUNT, "--> nfs4_try_mount()\n"); - export_path = data->nfs_server.export_path; - root_mnt = nfs_do_root_mount( - nfs4_create_server(mount_info, &nfs_v4), - flags, mount_info, - data->nfs_server.hostname); - - res = nfs_follow_remote_path(root_mnt, export_path); + res = do_nfs4_mount(nfs4_create_server(mount_info, &nfs_v4), + flags, mount_info, + data->nfs_server.hostname, + data->nfs_server.export_path); dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), @@ -258,8 +249,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, .set_security = nfs_clone_sb_security, .cloned = data, }; - char *export_path; - struct vfsmount *root_mnt; struct dentry *res; dprintk("--> nfs4_referral_mount()\n"); @@ -268,13 +257,10 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, if (!mount_info.mntfh) return ERR_PTR(-ENOMEM); - export_path = data->mnt_path; - root_mnt = nfs_do_root_mount( - nfs4_create_referral_server(mount_info.cloned, - mount_info.mntfh), - flags, &mount_info, data->hostname); + res = do_nfs4_mount(nfs4_create_referral_server(mount_info.cloned, + mount_info.mntfh), + flags, &mount_info, data->hostname, data->mnt_path); - res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), IS_ERR(res) ? " [error]" : ""); -- cgit v1.2.3-59-g8ed1b From 250d69f6a465e36a6ab8602030267de2586e028f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:55 -0500 Subject: nfs: lift setting mount_info from nfs_xdev_mount() Do it in nfs_do_submount() instead. As a side benefit, nfs_clone_data doesn't need ->fh and ->fattr anymore. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 3 +-- fs/nfs/namespace.c | 35 +++++++++++++++++++++-------------- fs/nfs/super.c | 25 ++++--------------------- 3 files changed, 26 insertions(+), 37 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 8f4900bd04f7..b193dd626c0a 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -34,8 +34,6 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) struct nfs_clone_mount { const struct super_block *sb; const struct dentry *dentry; - struct nfs_fh *fh; - struct nfs_fattr *fattr; char *hostname; char *mnt_path; struct sockaddr *addr; @@ -405,6 +403,7 @@ struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, const char *, struct nfs_mount_info *); void nfs_kill_super(struct super_block *); void nfs_fill_super(struct super_block *, struct nfs_mount_info *); +void nfs_clone_super(struct super_block *, struct nfs_mount_info *); extern struct rpc_stat nfs_rpcstat; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 5e0e9d29f5c5..a76aeb0c2923 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -19,6 +19,7 @@ #include #include #include "internal.h" +#include "nfs.h" #define NFSDBG_FACILITY NFSDBG_VFS @@ -213,16 +214,6 @@ void nfs_release_automount_timer(void) cancel_delayed_work(&nfs_automount_task); } -/* - * Clone a mountpoint of the appropriate type - */ -static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, - const char *devname, - struct nfs_clone_mount *mountdata) -{ - return vfs_submount(mountdata->dentry, &nfs_xdev_fs_type, devname, mountdata); -} - /** * nfs_do_submount - set up mountpoint when crossing a filesystem boundary * @dentry: parent directory @@ -234,13 +225,20 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr, rpc_authflavor_t authflavor) { + struct super_block *sb = dentry->d_sb; struct nfs_clone_mount mountdata = { - .sb = dentry->d_sb, + .sb = sb, .dentry = dentry, - .fh = fh, - .fattr = fattr, .authflavor = authflavor, }; + struct nfs_mount_info mount_info = { + .fill_super = nfs_clone_super, + .set_security = nfs_clone_sb_security, + .cloned = &mountdata, + .mntfh = fh, + }; + struct nfs_subversion *nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod; + struct nfs_server *server; struct vfsmount *mnt; char *page = (char *) __get_free_page(GFP_USER); char *devname; @@ -248,12 +246,21 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, if (page == NULL) return ERR_PTR(-ENOMEM); + server = nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, + fattr, authflavor); + if (IS_ERR(server)) + return ERR_CAST(server); + + mount_info.server = server; + devname = nfs_devname(dentry, page, PAGE_SIZE); if (IS_ERR(devname)) mnt = ERR_CAST(devname); else - mnt = nfs_do_clone_mount(NFS_SB(dentry->d_sb), devname, &mountdata); + mnt = vfs_submount(dentry, &nfs_xdev_fs_type, devname, &mount_info); + if (mount_info.server) + nfs_free_server(mount_info.server); free_page((unsigned long)page); return mnt; } diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 379c7b26051d..97dc544eb220 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2395,7 +2395,7 @@ EXPORT_SYMBOL_GPL(nfs_fill_super); /* * Finish setting up a cloned NFS2/3/4 superblock */ -static void nfs_clone_super(struct super_block *sb, +void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info) { const struct super_block *old_sb = mount_info->cloned->sb; @@ -2796,27 +2796,10 @@ static struct dentry * nfs_xdev_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_clone_mount *data = raw_data; - struct nfs_mount_info mount_info = { - .fill_super = nfs_clone_super, - .set_security = nfs_clone_sb_security, - .cloned = data, - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; - - dprintk("--> nfs_xdev_mount()\n"); + struct nfs_mount_info *info = raw_data; + struct nfs_subversion *nfs_mod = NFS_SB(info->cloned->sb)->nfs_client->cl_nfs_mod; - mount_info.mntfh = mount_info.cloned->fh; - - /* create a new volume representation */ - mount_info.server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - - mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, nfs_mod); - - dprintk("<-- nfs_xdev_mount() = %ld\n", - IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); - return mntroot; + return nfs_fs_mount_common(flags, dev_name, info, nfs_mod); } #if IS_ENABLED(CONFIG_NFS_V4) -- cgit v1.2.3-59-g8ed1b From 6a3f7a399ebf52164e40773f4fbcb31a4c1ec02a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:56 -0500 Subject: nfs: stash nfs_subversion reference into nfs_mount_info That will allow to get rid of passing those references around in quite a few places. Moreover, that will allow to merge xdev and remote file_system_type. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 1 + fs/nfs/namespace.c | 6 +++--- fs/nfs/nfs4super.c | 1 + fs/nfs/super.c | 1 + 4 files changed, 6 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index b193dd626c0a..9888e9c7abe2 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -142,6 +142,7 @@ struct nfs_mount_info { struct nfs_clone_mount *cloned; struct nfs_server *server; struct nfs_fh *mntfh; + struct nfs_subversion *nfs_mod; }; extern int nfs_mount(struct nfs_mount_request *info); diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index a76aeb0c2923..a00936dd153b 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -236,8 +236,8 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, .set_security = nfs_clone_sb_security, .cloned = &mountdata, .mntfh = fh, + .nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod, }; - struct nfs_subversion *nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod; struct nfs_server *server; struct vfsmount *mnt; char *page = (char *) __get_free_page(GFP_USER); @@ -246,8 +246,8 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, if (page == NULL) return ERR_PTR(-ENOMEM); - server = nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, - fattr, authflavor); + server = mount_info.nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, + fattr, authflavor); if (IS_ERR(server)) return ERR_CAST(server); diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index c489942b9069..6e5417027021 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -248,6 +248,7 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, .fill_super = nfs_fill_super, .set_security = nfs_clone_sb_security, .cloned = data, + .nfs_mod = &nfs_v4, }; struct dentry *res; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 97dc544eb220..6189f768aa59 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2761,6 +2761,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, mntroot = ERR_CAST(nfs_mod); goto out; } + mount_info.nfs_mod = nfs_mod; mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); -- cgit v1.2.3-59-g8ed1b From a55d3297be587c6baa0242ae0fbb92489e576005 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:57 -0500 Subject: nfs: don't bother passing nfs_subversion to ->try_mount() and nfs_fs_mount_common() Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 6 ++---- fs/nfs/nfs4_fs.h | 2 +- fs/nfs/nfs4super.c | 5 ++--- fs/nfs/super.c | 19 ++++++++----------- include/linux/nfs_xdr.h | 3 +-- 5 files changed, 14 insertions(+), 21 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 9888e9c7abe2..4a0ba66bc3aa 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -393,12 +393,10 @@ extern struct file_system_type nfs_xdev_fs_type; extern struct file_system_type nfs4_referral_fs_type; #endif bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); -struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, - struct nfs_subversion *); +struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(int, const char *, - struct nfs_mount_info *, struct nfs_subversion *); +struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, const char *, struct nfs_mount_info *); diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index a7a73b1d1fec..5d539dce9cef 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -526,7 +526,7 @@ extern const nfs4_stateid invalid_stateid; /* nfs4super.c */ struct nfs_mount_info; extern struct nfs_subversion nfs_v4; -struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); +struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *); extern bool nfs4_disable_idmapping; extern unsigned short max_session_slots; extern unsigned short max_session_cb_slots; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 6e5417027021..2b34d8e124cd 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -98,7 +98,7 @@ static struct dentry * nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { - return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, info); } struct nfs_referral_count { @@ -216,8 +216,7 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, } struct dentry *nfs4_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) + struct nfs_mount_info *mount_info) { struct nfs_parsed_mount_data *data = mount_info->parsed; struct dentry *res; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 6189f768aa59..cb0ead628842 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1893,15 +1893,15 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf } struct dentry *nfs_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) + struct nfs_mount_info *mount_info) { + struct nfs_subversion *nfs_mod = mount_info->nfs_mod; if (mount_info->parsed->need_mount) mount_info->server = nfs_try_mount_request(mount_info, nfs_mod); else mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); - return nfs_fs_mount_common(flags, dev_name, mount_info, nfs_mod); + return nfs_fs_mount_common(flags, dev_name, mount_info); } EXPORT_SYMBOL_GPL(nfs_try_mount); @@ -2648,8 +2648,7 @@ static void nfs_set_readahead(struct backing_dev_info *bdi, } struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, - struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) + struct nfs_mount_info *mount_info) { struct super_block *s; struct dentry *mntroot = ERR_PTR(-ENOMEM); @@ -2677,7 +2676,8 @@ struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, sb_mntdata.mntflags |= SB_SYNCHRONOUS; /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); + s = sget(mount_info->nfs_mod->nfs_fs, compare_super, nfs_set_super, + flags, &sb_mntdata); if (IS_ERR(s)) { mntroot = ERR_CAST(s); goto out_err_nosb; @@ -2763,7 +2763,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, } mount_info.nfs_mod = nfs_mod; - mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); + mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info); put_nfs_version(nfs_mod); out: @@ -2797,10 +2797,7 @@ static struct dentry * nfs_xdev_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_mount_info *info = raw_data; - struct nfs_subversion *nfs_mod = NFS_SB(info->cloned->sb)->nfs_client->cl_nfs_mod; - - return nfs_fs_mount_common(flags, dev_name, info, nfs_mod); + return nfs_fs_mount_common(flags, dev_name, raw_data); } #if IS_ENABLED(CONFIG_NFS_V4) diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 72d5695c1b47..3ee2ad642cbc 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1655,8 +1655,7 @@ struct nfs_rpc_ops { struct nfs_fsinfo *); struct vfsmount *(*submount) (struct nfs_server *, struct dentry *, struct nfs_fh *, struct nfs_fattr *); - struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *, - struct nfs_subversion *); + struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *); int (*getattr) (struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *, struct inode *); -- cgit v1.2.3-59-g8ed1b From 82eaed2beef5ce31ecfeb70a33616e6331a51ef2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:58 -0500 Subject: nfs: merge xdev and remote file_system_type they are identical now... Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 2 +- fs/nfs/namespace.c | 2 +- fs/nfs/nfs4super.c | 22 +--------------------- fs/nfs/super.c | 14 ++++++++------ 4 files changed, 11 insertions(+), 29 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 4a0ba66bc3aa..e338558b7908 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -388,7 +388,7 @@ extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); /* super.c */ extern const struct super_operations nfs_sops; extern struct file_system_type nfs_fs_type; -extern struct file_system_type nfs_xdev_fs_type; +extern struct file_system_type nfs_prepared_fs_type; #if IS_ENABLED(CONFIG_NFS_V4) extern struct file_system_type nfs4_referral_fs_type; #endif diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index a00936dd153b..e5f4f2d760af 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -257,7 +257,7 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, if (IS_ERR(devname)) mnt = ERR_CAST(devname); else - mnt = vfs_submount(dentry, &nfs_xdev_fs_type, devname, &mount_info); + mnt = vfs_submount(dentry, &nfs_prepared_fs_type, devname, &mount_info); if (mount_info.server) nfs_free_server(mount_info.server); diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 2b34d8e124cd..1358d8078737 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -18,19 +18,9 @@ static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc); static void nfs4_evict_inode(struct inode *inode); -static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); -static struct file_system_type nfs4_remote_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_remote_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; - struct file_system_type nfs4_referral_fs_type = { .owner = THIS_MODULE, .name = "nfs4", @@ -91,16 +81,6 @@ static void nfs4_evict_inode(struct inode *inode) nfs_clear_inode(inode); } -/* - * Get the superblock for the NFS4 root partition - */ -static struct dentry * -nfs4_remote_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *info) -{ - return nfs_fs_mount_common(flags, dev_name, info); -} - struct nfs_referral_count { struct list_head list; const struct task_struct *task; @@ -194,7 +174,7 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, else snprintf(root_devname, len, "%s:/", hostname); info->server = server; - root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info); + root_mnt = vfs_kern_mount(&nfs_prepared_fs_type, flags, root_devname, info); if (info->server) nfs_free_server(info->server); info->server = NULL; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index cb0ead628842..60845dc864e7 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -293,7 +293,7 @@ static match_table_t nfs_vers_tokens = { { Opt_vers_err, NULL } }; -static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, +static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); struct file_system_type nfs_fs_type = { @@ -306,13 +306,14 @@ struct file_system_type nfs_fs_type = { MODULE_ALIAS_FS("nfs"); EXPORT_SYMBOL_GPL(nfs_fs_type); -struct file_system_type nfs_xdev_fs_type = { +struct file_system_type nfs_prepared_fs_type = { .owner = THIS_MODULE, .name = "nfs", - .mount = nfs_xdev_mount, + .mount = nfs_prepared_mount, .kill_sb = nfs_kill_super, .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; +EXPORT_SYMBOL_GPL(nfs_prepared_fs_type); const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, @@ -2791,11 +2792,12 @@ void nfs_kill_super(struct super_block *s) EXPORT_SYMBOL_GPL(nfs_kill_super); /* - * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) + * Internal use only: mount_info is already set up by caller. + * Used for mountpoint crossings and for nfs4 root. */ static struct dentry * -nfs_xdev_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) +nfs_prepared_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { return nfs_fs_mount_common(flags, dev_name, raw_data); } -- cgit v1.2.3-59-g8ed1b From 1bc3a2cbf239fc6c5984a074cc0d7b6de182407d Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:30:59 -0500 Subject: nfs: unexport nfs_fs_mount_common() Make it static, even. And remove a stale extern of (long-gone) nfs_xdev_mount_common() from internal.h, while we are at it. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 3 --- fs/nfs/super.c | 5 +++-- 2 files changed, 3 insertions(+), 5 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index e338558b7908..310f81a149b2 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -396,10 +396,7 @@ bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); -struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, - const char *, struct nfs_mount_info *); void nfs_kill_super(struct super_block *); void nfs_fill_super(struct super_block *, struct nfs_mount_info *); void nfs_clone_super(struct super_block *, struct nfs_mount_info *); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 60845dc864e7..0bedac041272 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1893,6 +1893,8 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); } +static struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); + struct dentry *nfs_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { @@ -2648,7 +2650,7 @@ static void nfs_set_readahead(struct backing_dev_info *bdi, bdi->io_pages = iomax_pages; } -struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, +static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { struct super_block *s; @@ -2730,7 +2732,6 @@ error_splat_super: deactivate_locked_super(s); goto out; } -EXPORT_SYMBOL_GPL(nfs_fs_mount_common); struct dentry *nfs_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) -- cgit v1.2.3-59-g8ed1b From 0c38f2131df9865aa9fb24b7ad30a9657588e0e1 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:31:00 -0500 Subject: nfs: don't pass nfs_subversion to ->create_server() pick it from mount_info Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/client.c | 4 ++-- fs/nfs/internal.h | 7 ++----- fs/nfs/nfs3_fs.h | 2 +- fs/nfs/nfs3client.c | 5 ++--- fs/nfs/nfs4client.c | 3 +-- fs/nfs/nfs4super.c | 2 +- fs/nfs/super.c | 14 +++++++------- include/linux/nfs_xdr.h | 2 +- 8 files changed, 17 insertions(+), 22 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 02110a30a49e..a2049747adc4 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -951,10 +951,10 @@ EXPORT_SYMBOL_GPL(nfs_free_server); * Create a version 2 or 3 volume record * - keyed on server and FSID */ -struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) { struct nfs_server *server; + struct nfs_subversion *nfs_mod = mount_info->nfs_mod; struct nfs_fattr *fattr; int error; diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 310f81a149b2..0bb0493785fc 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -170,11 +170,8 @@ extern struct nfs_client *nfs4_find_client_ident(struct net *, int); extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); -extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, - struct nfs_subversion *); -extern struct nfs_server *nfs4_create_server( - struct nfs_mount_info *, - struct nfs_subversion *); +extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); +extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, struct nfs_fh *); extern int nfs4_update_server(struct nfs_server *server, const char *hostname, diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h index f82e11c4cb56..09602dc1889f 100644 --- a/fs/nfs/nfs3_fs.h +++ b/fs/nfs/nfs3_fs.h @@ -27,7 +27,7 @@ static inline int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, #endif /* CONFIG_NFS_V3_ACL */ /* nfs3client.c */ -struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); +struct nfs_server *nfs3_create_server(struct nfs_mount_info *); struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c index 223904bc40a7..54727d3d3042 100644 --- a/fs/nfs/nfs3client.c +++ b/fs/nfs/nfs3client.c @@ -46,10 +46,9 @@ static inline void nfs_init_server_aclclient(struct nfs_server *server) } #endif -struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info) { - struct nfs_server *server = nfs_create_server(mount_info, nfs_mod); + struct nfs_server *server = nfs_create_server(mount_info); /* Create a client RPC handle for the NFS v3 ACL management interface */ if (!IS_ERR(server)) nfs_init_server_aclclient(server); diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 460d6251c405..538fd036b69d 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1112,8 +1112,7 @@ static int nfs4_init_server(struct nfs_server *server, */ /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, struct nfs_fh *mntfh)*/ -struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) { struct nfs_server *server; bool auth_probe; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 1358d8078737..e5d8a76bd144 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -205,7 +205,7 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, dfprintk(MOUNT, "--> nfs4_try_mount()\n"); - res = do_nfs4_mount(nfs4_create_server(mount_info, &nfs_v4), + res = do_nfs4_mount(nfs4_create_server(mount_info), flags, mount_info, data->nfs_server.hostname, data->nfs_server.export_path); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 0bedac041272..6239c78d8f54 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1820,8 +1820,7 @@ static int nfs_request_mount(struct nfs_parsed_mount_data *args, return 0; } -static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, - struct nfs_subversion *nfs_mod) +static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info) { int status; unsigned int i; @@ -1831,6 +1830,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf struct nfs_parsed_mount_data *args = mount_info->parsed; rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; unsigned int authlist_len = ARRAY_SIZE(authlist); + struct nfs_subversion *nfs_mod = mount_info->nfs_mod; status = nfs_request_mount(args, mount_info->mntfh, authlist, &authlist_len); @@ -1847,7 +1847,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf args->selected_flavor); if (status) return ERR_PTR(status); - return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + return nfs_mod->rpc_ops->create_server(mount_info); } /* @@ -1874,7 +1874,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); args->selected_flavor = flavor; - server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + server = nfs_mod->rpc_ops->create_server(mount_info); if (!IS_ERR(server)) return server; } @@ -1890,7 +1890,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); args->selected_flavor = RPC_AUTH_UNIX; - return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + return nfs_mod->rpc_ops->create_server(mount_info); } static struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); @@ -1900,9 +1900,9 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, { struct nfs_subversion *nfs_mod = mount_info->nfs_mod; if (mount_info->parsed->need_mount) - mount_info->server = nfs_try_mount_request(mount_info, nfs_mod); + mount_info->server = nfs_try_mount_request(mount_info); else - mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + mount_info->server = nfs_mod->rpc_ops->create_server(mount_info); return nfs_fs_mount_common(flags, dev_name, mount_info); } diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 3ee2ad642cbc..17527f6e6360 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1722,7 +1722,7 @@ struct nfs_rpc_ops { struct nfs_client *(*init_client) (struct nfs_client *, const struct nfs_client_initdata *); void (*free_client) (struct nfs_client *); - struct nfs_server *(*create_server)(struct nfs_mount_info *, struct nfs_subversion *); + struct nfs_server *(*create_server)(struct nfs_mount_info *); struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); }; -- cgit v1.2.3-59-g8ed1b From ab88dca311a3722a66f7dee3c352e634ad1e6a25 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:31:01 -0500 Subject: nfs: get rid of mount_info ->fill_super() The only possible values are nfs_fill_super and nfs_clone_super. The latter is used only when crossing into a submount and it is almost identical to the former; the only differences are * ->s_time_gran unconditionally set to 1 (even for v2 mounts). Regression dating back to 2012, actually. * ->s_blocksize/->s_blocksize_bits set to that of parent. Rather than messing with the method, stash ->s_blocksize_bits in mount_info in submount case and after the (now unconditional) call of nfs_fill_super() override ->s_blocksize/->s_blocksize_bits if that has been set. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 4 +-- fs/nfs/namespace.c | 2 +- fs/nfs/nfs4super.c | 1 - fs/nfs/super.c | 75 ++++++++++++------------------------------------------ 4 files changed, 18 insertions(+), 64 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 0bb0493785fc..65c8e353cb6b 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -136,7 +136,7 @@ struct nfs_mount_request { }; struct nfs_mount_info { - void (*fill_super)(struct super_block *, struct nfs_mount_info *); + unsigned int inherited_bsize; int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; struct nfs_clone_mount *cloned; @@ -395,8 +395,6 @@ int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_ int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); void nfs_kill_super(struct super_block *); -void nfs_fill_super(struct super_block *, struct nfs_mount_info *); -void nfs_clone_super(struct super_block *, struct nfs_mount_info *); extern struct rpc_stat nfs_rpcstat; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index e5f4f2d760af..30331558bd8e 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -232,7 +232,7 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, .authflavor = authflavor, }; struct nfs_mount_info mount_info = { - .fill_super = nfs_clone_super, + .inherited_bsize = sb->s_blocksize_bits, .set_security = nfs_clone_sb_security, .cloned = &mountdata, .mntfh = fh, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index e5d8a76bd144..5020a43b31c9 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -224,7 +224,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, { struct nfs_clone_mount *data = raw_data; struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, .set_security = nfs_clone_sb_security, .cloned = data, .nfs_mod = &nfs_v4, diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 6239c78d8f54..2bcf0f8295e0 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2339,29 +2339,9 @@ out: EXPORT_SYMBOL_GPL(nfs_remount); /* - * Initialise the common bits of the superblock + * Finish setting up an NFS superblock */ -static void nfs_initialise_sb(struct super_block *sb) -{ - struct nfs_server *server = NFS_SB(sb); - - sb->s_magic = NFS_SUPER_MAGIC; - - /* We probably want something more informative here */ - snprintf(sb->s_id, sizeof(sb->s_id), - "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); - - if (sb->s_blocksize == 0) - sb->s_blocksize = nfs_block_bits(server->wsize, - &sb->s_blocksize_bits); - - nfs_super_set_maxbytes(sb, server->maxfilesize); -} - -/* - * Finish setting up an NFS2/3 superblock - */ -void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) +static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) { struct nfs_parsed_mount_data *data = mount_info->parsed; struct nfs_server *server = NFS_SB(sb); @@ -2391,44 +2371,17 @@ void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) sb->s_time_max = S64_MAX; } - nfs_initialise_sb(sb); -} -EXPORT_SYMBOL_GPL(nfs_fill_super); - -/* - * Finish setting up a cloned NFS2/3/4 superblock - */ -void nfs_clone_super(struct super_block *sb, - struct nfs_mount_info *mount_info) -{ - const struct super_block *old_sb = mount_info->cloned->sb; - struct nfs_server *server = NFS_SB(sb); - - sb->s_blocksize_bits = old_sb->s_blocksize_bits; - sb->s_blocksize = old_sb->s_blocksize; - sb->s_maxbytes = old_sb->s_maxbytes; - sb->s_xattr = old_sb->s_xattr; - sb->s_op = old_sb->s_op; - sb->s_export_op = old_sb->s_export_op; + sb->s_magic = NFS_SUPER_MAGIC; - if (server->nfs_client->rpc_ops->version != 2) { - /* The VFS shouldn't apply the umask to mode bits. We will do - * so ourselves when necessary. - */ - sb->s_flags |= SB_POSIXACL; - sb->s_time_gran = 1; - } else - sb->s_time_gran = 1000; + /* We probably want something more informative here */ + snprintf(sb->s_id, sizeof(sb->s_id), + "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); - if (server->nfs_client->rpc_ops->version != 4) { - sb->s_time_min = 0; - sb->s_time_max = U32_MAX; - } else { - sb->s_time_min = S64_MIN; - sb->s_time_max = S64_MAX; - } + if (sb->s_blocksize == 0) + sb->s_blocksize = nfs_block_bits(server->wsize, + &sb->s_blocksize_bits); - nfs_initialise_sb(sb); + nfs_super_set_maxbytes(sb, server->maxfilesize); } static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) @@ -2701,8 +2654,13 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, } if (!s->s_root) { + unsigned bsize = mount_info->inherited_bsize; /* initial superblock/root creation */ - mount_info->fill_super(s, mount_info); + nfs_fill_super(s, mount_info); + if (bsize) { + s->s_blocksize_bits = bsize; + s->s_blocksize = 1U << bsize; + } nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); if (!(server->flags & NFS_MOUNT_UNSHARED)) s->s_iflags |= SB_I_MULTIROOT; @@ -2737,7 +2695,6 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, .set_security = nfs_set_sb_security, }; struct dentry *mntroot = ERR_PTR(-ENOMEM); -- cgit v1.2.3-59-g8ed1b From ba8b6148067f51528dedf65b533d5094e25e6205 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:31:02 -0500 Subject: nfs_clone_sb_security(): simplify the check for server bogosity We used to check ->i_op for being nfs_dir_inode_operations. With separate inode_operations for v3 and v4 that became bogus, but rather than going for protocol-dependent comparison we could've just checked ->i_fop instead; _that_ is the same for all protocol versions. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 2bcf0f8295e0..bec6c341f72c 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2578,7 +2578,7 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, unsigned long kflags = 0, kflags_out = 0; /* clone any lsm security options from the parent to the new sb */ - if (d_inode(mntroot)->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) + if (d_inode(mntroot)->i_fop != &nfs_dir_operations) return -ESTALE; if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) -- cgit v1.2.3-59-g8ed1b From adf2314fe667565258f304a04990d334defabeaf Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Dec 2019 07:31:03 -0500 Subject: nfs: get rid of ->set_security() it's always either nfs_set_sb_security() or nfs_clone_sb_security(), the choice being controlled by mount_info->cloned != NULL. No need to add methods, especially when both instances live right next to the caller and are never accessed anywhere else. Reviewed-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 3 --- fs/nfs/namespace.c | 1 - fs/nfs/nfs4super.c | 3 --- fs/nfs/super.c | 69 +++++++++++++++++------------------------------------- 4 files changed, 21 insertions(+), 55 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 65c8e353cb6b..a467e43fc682 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -137,7 +137,6 @@ struct nfs_mount_request { struct nfs_mount_info { unsigned int inherited_bsize; - int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; struct nfs_clone_mount *cloned; struct nfs_server *server; @@ -391,8 +390,6 @@ extern struct file_system_type nfs4_referral_fs_type; #endif bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); -int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); void nfs_kill_super(struct super_block *); diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 30331558bd8e..bfe607374feb 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -233,7 +233,6 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, }; struct nfs_mount_info mount_info = { .inherited_bsize = sb->s_blocksize_bits, - .set_security = nfs_clone_sb_security, .cloned = &mountdata, .mntfh = fh, .nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 5020a43b31c9..f1c2d294073a 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -201,8 +201,6 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_parsed_mount_data *data = mount_info->parsed; struct dentry *res; - mount_info->set_security = nfs_set_sb_security; - dfprintk(MOUNT, "--> nfs4_try_mount()\n"); res = do_nfs4_mount(nfs4_create_server(mount_info), @@ -224,7 +222,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, { struct nfs_clone_mount *data = raw_data; struct nfs_mount_info mount_info = { - .set_security = nfs_clone_sb_security, .cloned = data, .nfs_mod = &nfs_v4, }; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index bec6c341f72c..de00f89dbe6e 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2550,52 +2550,6 @@ static void nfs_get_cache_cookie(struct super_block *sb, } #endif -int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, - struct nfs_mount_info *mount_info) -{ - int error; - unsigned long kflags = 0, kflags_out = 0; - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) - kflags |= SECURITY_LSM_NATIVE_LABELS; - - error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, - kflags, &kflags_out); - if (error) - goto err; - - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && - !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) - NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; -err: - return error; -} -EXPORT_SYMBOL_GPL(nfs_set_sb_security); - -int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, - struct nfs_mount_info *mount_info) -{ - int error; - unsigned long kflags = 0, kflags_out = 0; - - /* clone any lsm security options from the parent to the new sb */ - if (d_inode(mntroot)->i_fop != &nfs_dir_operations) - return -ESTALE; - - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) - kflags |= SECURITY_LSM_NATIVE_LABELS; - - error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, - &kflags_out); - if (error) - return error; - - if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && - !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) - NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; - return 0; -} -EXPORT_SYMBOL_GPL(nfs_clone_sb_security); - static void nfs_set_readahead(struct backing_dev_info *bdi, unsigned long iomax_pages) { @@ -2610,6 +2564,7 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, struct dentry *mntroot = ERR_PTR(-ENOMEM); int (*compare_super)(struct super_block *, void *) = nfs_compare_super; struct nfs_server *server = mount_info->server; + unsigned long kflags = 0, kflags_out = 0; struct nfs_sb_mountdata sb_mntdata = { .mntflags = flags, .server = server, @@ -2670,7 +2625,26 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, if (IS_ERR(mntroot)) goto error_splat_super; - error = mount_info->set_security(s, mntroot, mount_info); + + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) + kflags |= SECURITY_LSM_NATIVE_LABELS; + if (mount_info->cloned) { + if (d_inode(mntroot)->i_fop != &nfs_dir_operations) { + error = -ESTALE; + goto error_splat_root; + } + /* clone any lsm security options from the parent to the new sb */ + error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, + &kflags_out); + } else { + error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, + kflags, &kflags_out); + } + if (error) + goto error_splat_root; + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && + !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) + NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; if (error) goto error_splat_root; @@ -2695,7 +2669,6 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_mount_info mount_info = { - .set_security = nfs_set_sb_security, }; struct dentry *mntroot = ERR_PTR(-ENOMEM); struct nfs_subversion *nfs_mod; -- cgit v1.2.3-59-g8ed1b From 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:04 -0500 Subject: NFS: Move mount parameterisation bits into their own file Split various bits relating to mount parameterisation out from fs/nfs/super.c into their own file to form the basis of filesystem context handling for NFS. No other changes are made to the code beyond removing 'static' qualifiers. Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/Makefile | 2 +- fs/nfs/fs_context.c | 1414 +++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/internal.h | 30 ++ fs/nfs/super.c | 1411 -------------------------------------------------- 4 files changed, 1445 insertions(+), 1412 deletions(-) create mode 100644 fs/nfs/fs_context.c (limited to 'fs/nfs') diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile index 34cdeaecccf6..2433c3e03cfa 100644 --- a/fs/nfs/Makefile +++ b/fs/nfs/Makefile @@ -9,7 +9,7 @@ CFLAGS_nfstrace.o += -I$(src) nfs-y := client.o dir.o file.o getroot.o inode.o super.o \ io.o direct.o pagelist.o read.o symlink.o unlink.o \ write.o namespace.o mount_clnt.o nfstrace.o \ - export.o sysfs.o + export.o sysfs.o fs_context.o nfs-$(CONFIG_ROOT_NFS) += nfsroot.o nfs-$(CONFIG_SYSCTL) += sysctl.o nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c new file mode 100644 index 000000000000..c8f99a3c7264 --- /dev/null +++ b/fs/nfs/fs_context.c @@ -0,0 +1,1414 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/fs/nfs/fs_context.c + * + * Copyright (C) 1992 Rick Sladkey + * + * NFS mount handling. + * + * Split from fs/nfs/super.c by David Howells + */ + +#include +#include +#include +#include +#include +#include +#include "nfs.h" +#include "internal.h" + +#define NFSDBG_FACILITY NFSDBG_MOUNT + +#if IS_ENABLED(CONFIG_NFS_V3) +#define NFS_DEFAULT_VERSION 3 +#else +#define NFS_DEFAULT_VERSION 2 +#endif + +#define NFS_MAX_CONNECTIONS 16 + +enum { + /* Mount options that take no arguments */ + Opt_soft, Opt_softerr, Opt_hard, + Opt_posix, Opt_noposix, + Opt_cto, Opt_nocto, + Opt_ac, Opt_noac, + Opt_lock, Opt_nolock, + Opt_udp, Opt_tcp, Opt_rdma, + Opt_acl, Opt_noacl, + Opt_rdirplus, Opt_nordirplus, + Opt_sharecache, Opt_nosharecache, + Opt_resvport, Opt_noresvport, + Opt_fscache, Opt_nofscache, + Opt_migration, Opt_nomigration, + + /* Mount options that take integer arguments */ + Opt_port, + Opt_rsize, Opt_wsize, Opt_bsize, + Opt_timeo, Opt_retrans, + Opt_acregmin, Opt_acregmax, + Opt_acdirmin, Opt_acdirmax, + Opt_actimeo, + Opt_namelen, + Opt_mountport, + Opt_mountvers, + Opt_minorversion, + + /* Mount options that take string arguments */ + Opt_nfsvers, + Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, + Opt_addr, Opt_mountaddr, Opt_clientaddr, + Opt_nconnect, + Opt_lookupcache, + Opt_fscache_uniq, + Opt_local_lock, + + /* Special mount options */ + Opt_userspace, Opt_deprecated, Opt_sloppy, + + Opt_err +}; + +static const match_table_t nfs_mount_option_tokens = { + { Opt_userspace, "bg" }, + { Opt_userspace, "fg" }, + { Opt_userspace, "retry=%s" }, + + { Opt_sloppy, "sloppy" }, + + { Opt_soft, "soft" }, + { Opt_softerr, "softerr" }, + { Opt_hard, "hard" }, + { Opt_deprecated, "intr" }, + { Opt_deprecated, "nointr" }, + { Opt_posix, "posix" }, + { Opt_noposix, "noposix" }, + { Opt_cto, "cto" }, + { Opt_nocto, "nocto" }, + { Opt_ac, "ac" }, + { Opt_noac, "noac" }, + { Opt_lock, "lock" }, + { Opt_nolock, "nolock" }, + { Opt_udp, "udp" }, + { Opt_tcp, "tcp" }, + { Opt_rdma, "rdma" }, + { Opt_acl, "acl" }, + { Opt_noacl, "noacl" }, + { Opt_rdirplus, "rdirplus" }, + { Opt_nordirplus, "nordirplus" }, + { Opt_sharecache, "sharecache" }, + { Opt_nosharecache, "nosharecache" }, + { Opt_resvport, "resvport" }, + { Opt_noresvport, "noresvport" }, + { Opt_fscache, "fsc" }, + { Opt_nofscache, "nofsc" }, + { Opt_migration, "migration" }, + { Opt_nomigration, "nomigration" }, + + { Opt_port, "port=%s" }, + { Opt_rsize, "rsize=%s" }, + { Opt_wsize, "wsize=%s" }, + { Opt_bsize, "bsize=%s" }, + { Opt_timeo, "timeo=%s" }, + { Opt_retrans, "retrans=%s" }, + { Opt_acregmin, "acregmin=%s" }, + { Opt_acregmax, "acregmax=%s" }, + { Opt_acdirmin, "acdirmin=%s" }, + { Opt_acdirmax, "acdirmax=%s" }, + { Opt_actimeo, "actimeo=%s" }, + { Opt_namelen, "namlen=%s" }, + { Opt_mountport, "mountport=%s" }, + { Opt_mountvers, "mountvers=%s" }, + { Opt_minorversion, "minorversion=%s" }, + + { Opt_nfsvers, "nfsvers=%s" }, + { Opt_nfsvers, "vers=%s" }, + + { Opt_sec, "sec=%s" }, + { Opt_proto, "proto=%s" }, + { Opt_mountproto, "mountproto=%s" }, + { Opt_addr, "addr=%s" }, + { Opt_clientaddr, "clientaddr=%s" }, + { Opt_mounthost, "mounthost=%s" }, + { Opt_mountaddr, "mountaddr=%s" }, + + { Opt_nconnect, "nconnect=%s" }, + + { Opt_lookupcache, "lookupcache=%s" }, + { Opt_fscache_uniq, "fsc=%s" }, + { Opt_local_lock, "local_lock=%s" }, + + /* The following needs to be listed after all other options */ + { Opt_nfsvers, "v%s" }, + + { Opt_err, NULL } +}; + +enum { + Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, + Opt_xprt_rdma6, + + Opt_xprt_err +}; + +static const match_table_t nfs_xprt_protocol_tokens = { + { Opt_xprt_udp, "udp" }, + { Opt_xprt_udp6, "udp6" }, + { Opt_xprt_tcp, "tcp" }, + { Opt_xprt_tcp6, "tcp6" }, + { Opt_xprt_rdma, "rdma" }, + { Opt_xprt_rdma6, "rdma6" }, + + { Opt_xprt_err, NULL } +}; + +enum { + Opt_sec_none, Opt_sec_sys, + Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, + Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, + Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, + + Opt_sec_err +}; + +static const match_table_t nfs_secflavor_tokens = { + { Opt_sec_none, "none" }, + { Opt_sec_none, "null" }, + { Opt_sec_sys, "sys" }, + + { Opt_sec_krb5, "krb5" }, + { Opt_sec_krb5i, "krb5i" }, + { Opt_sec_krb5p, "krb5p" }, + + { Opt_sec_lkey, "lkey" }, + { Opt_sec_lkeyi, "lkeyi" }, + { Opt_sec_lkeyp, "lkeyp" }, + + { Opt_sec_spkm, "spkm3" }, + { Opt_sec_spkmi, "spkm3i" }, + { Opt_sec_spkmp, "spkm3p" }, + + { Opt_sec_err, NULL } +}; + +enum { + Opt_lookupcache_all, Opt_lookupcache_positive, + Opt_lookupcache_none, + + Opt_lookupcache_err +}; + +static match_table_t nfs_lookupcache_tokens = { + { Opt_lookupcache_all, "all" }, + { Opt_lookupcache_positive, "pos" }, + { Opt_lookupcache_positive, "positive" }, + { Opt_lookupcache_none, "none" }, + + { Opt_lookupcache_err, NULL } +}; + +enum { + Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, + Opt_local_lock_none, + + Opt_local_lock_err +}; + +static match_table_t nfs_local_lock_tokens = { + { Opt_local_lock_all, "all" }, + { Opt_local_lock_flock, "flock" }, + { Opt_local_lock_posix, "posix" }, + { Opt_local_lock_none, "none" }, + + { Opt_local_lock_err, NULL } +}; + +enum { + Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, + Opt_vers_4_1, Opt_vers_4_2, + + Opt_vers_err +}; + +static match_table_t nfs_vers_tokens = { + { Opt_vers_2, "2" }, + { Opt_vers_3, "3" }, + { Opt_vers_4, "4" }, + { Opt_vers_4_0, "4.0" }, + { Opt_vers_4_1, "4.1" }, + { Opt_vers_4_2, "4.2" }, + + { Opt_vers_err, NULL } +}; + +struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) +{ + struct nfs_parsed_mount_data *data; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data) { + data->timeo = NFS_UNSPEC_TIMEO; + data->retrans = NFS_UNSPEC_RETRANS; + data->acregmin = NFS_DEF_ACREGMIN; + data->acregmax = NFS_DEF_ACREGMAX; + data->acdirmin = NFS_DEF_ACDIRMIN; + data->acdirmax = NFS_DEF_ACDIRMAX; + data->mount_server.port = NFS_UNSPEC_PORT; + data->nfs_server.port = NFS_UNSPEC_PORT; + data->nfs_server.protocol = XPRT_TRANSPORT_TCP; + data->selected_flavor = RPC_AUTH_MAXFLAVOR; + data->minorversion = 0; + data->need_mount = true; + data->net = current->nsproxy->net_ns; + data->lsm_opts = NULL; + } + return data; +} + +void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) +{ + if (data) { + kfree(data->client_address); + kfree(data->mount_server.hostname); + kfree(data->nfs_server.export_path); + kfree(data->nfs_server.hostname); + kfree(data->fscache_uniq); + security_free_mnt_opts(&data->lsm_opts); + kfree(data); + } +} + +/* + * Sanity-check a server address provided by the mount command. + * + * Address family must be initialized, and address must not be + * the ANY address for that family. + */ +static int nfs_verify_server_address(struct sockaddr *addr) +{ + switch (addr->sa_family) { + case AF_INET: { + struct sockaddr_in *sa = (struct sockaddr_in *)addr; + return sa->sin_addr.s_addr != htonl(INADDR_ANY); + } + case AF_INET6: { + struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; + return !ipv6_addr_any(sa); + } + } + + dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); + return 0; +} + +/* + * Sanity check the NFS transport protocol. + * + */ +static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) +{ + switch (mnt->nfs_server.protocol) { + case XPRT_TRANSPORT_UDP: + case XPRT_TRANSPORT_TCP: + case XPRT_TRANSPORT_RDMA: + break; + default: + mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + } +} + +/* + * For text based NFSv2/v3 mounts, the mount protocol transport default + * settings should depend upon the specified NFS transport. + */ +static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) +{ + nfs_validate_transport_protocol(mnt); + + if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || + mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) + return; + switch (mnt->nfs_server.protocol) { + case XPRT_TRANSPORT_UDP: + mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + break; + case XPRT_TRANSPORT_TCP: + case XPRT_TRANSPORT_RDMA: + mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + } +} + +/* + * Add 'flavor' to 'auth_info' if not already present. + * Returns true if 'flavor' ends up in the list, false otherwise + */ +static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, + rpc_authflavor_t flavor) +{ + unsigned int i; + unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); + + /* make sure this flavor isn't already in the list */ + for (i = 0; i < auth_info->flavor_len; i++) { + if (flavor == auth_info->flavors[i]) + return true; + } + + if (auth_info->flavor_len + 1 >= max_flavor_len) { + dfprintk(MOUNT, "NFS: too many sec= flavors\n"); + return false; + } + + auth_info->flavors[auth_info->flavor_len++] = flavor; + return true; +} + +/* + * Parse the value of the 'sec=' option. + */ +static int nfs_parse_security_flavors(char *value, + struct nfs_parsed_mount_data *mnt) +{ + substring_t args[MAX_OPT_ARGS]; + rpc_authflavor_t pseudoflavor; + char *p; + + dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); + + while ((p = strsep(&value, ":")) != NULL) { + switch (match_token(p, nfs_secflavor_tokens, args)) { + case Opt_sec_none: + pseudoflavor = RPC_AUTH_NULL; + break; + case Opt_sec_sys: + pseudoflavor = RPC_AUTH_UNIX; + break; + case Opt_sec_krb5: + pseudoflavor = RPC_AUTH_GSS_KRB5; + break; + case Opt_sec_krb5i: + pseudoflavor = RPC_AUTH_GSS_KRB5I; + break; + case Opt_sec_krb5p: + pseudoflavor = RPC_AUTH_GSS_KRB5P; + break; + case Opt_sec_lkey: + pseudoflavor = RPC_AUTH_GSS_LKEY; + break; + case Opt_sec_lkeyi: + pseudoflavor = RPC_AUTH_GSS_LKEYI; + break; + case Opt_sec_lkeyp: + pseudoflavor = RPC_AUTH_GSS_LKEYP; + break; + case Opt_sec_spkm: + pseudoflavor = RPC_AUTH_GSS_SPKM; + break; + case Opt_sec_spkmi: + pseudoflavor = RPC_AUTH_GSS_SPKMI; + break; + case Opt_sec_spkmp: + pseudoflavor = RPC_AUTH_GSS_SPKMP; + break; + default: + dfprintk(MOUNT, + "NFS: sec= option '%s' not recognized\n", p); + return 0; + } + + if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) + return 0; + } + + return 1; +} + +static int nfs_parse_version_string(char *string, + struct nfs_parsed_mount_data *mnt, + substring_t *args) +{ + mnt->flags &= ~NFS_MOUNT_VER3; + switch (match_token(string, nfs_vers_tokens, args)) { + case Opt_vers_2: + mnt->version = 2; + break; + case Opt_vers_3: + mnt->flags |= NFS_MOUNT_VER3; + mnt->version = 3; + break; + case Opt_vers_4: + /* Backward compatibility option. In future, + * the mount program should always supply + * a NFSv4 minor version number. + */ + mnt->version = 4; + break; + case Opt_vers_4_0: + mnt->version = 4; + mnt->minorversion = 0; + break; + case Opt_vers_4_1: + mnt->version = 4; + mnt->minorversion = 1; + break; + case Opt_vers_4_2: + mnt->version = 4; + mnt->minorversion = 2; + break; + default: + return 0; + } + return 1; +} + +static int nfs_get_option_str(substring_t args[], char **option) +{ + kfree(*option); + *option = match_strdup(args); + return !*option; +} + +static int nfs_get_option_ul(substring_t args[], unsigned long *option) +{ + int rc; + char *string; + + string = match_strdup(args); + if (string == NULL) + return -ENOMEM; + rc = kstrtoul(string, 10, option); + kfree(string); + + return rc; +} + +static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, + unsigned long l_bound, unsigned long u_bound) +{ + int ret; + + ret = nfs_get_option_ul(args, option); + if (ret != 0) + return ret; + if (*option < l_bound || *option > u_bound) + return -ERANGE; + return 0; +} + +/* + * Error-check and convert a string of mount options from user space into + * a data structure. The whole mount string is processed; bad options are + * skipped as they are encountered. If there were no errors, return 1; + * otherwise return 0 (zero). + */ +int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) +{ + char *p, *string; + int rc, sloppy = 0, invalid_option = 0; + unsigned short protofamily = AF_UNSPEC; + unsigned short mountfamily = AF_UNSPEC; + + if (!raw) { + dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); + return 1; + } + dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); + + rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); + if (rc) + goto out_security_failure; + + while ((p = strsep(&raw, ",")) != NULL) { + substring_t args[MAX_OPT_ARGS]; + unsigned long option; + int token; + + if (!*p) + continue; + + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + + token = match_token(p, nfs_mount_option_tokens, args); + switch (token) { + + /* + * boolean options: foo/nofoo + */ + case Opt_soft: + mnt->flags |= NFS_MOUNT_SOFT; + mnt->flags &= ~NFS_MOUNT_SOFTERR; + break; + case Opt_softerr: + mnt->flags |= NFS_MOUNT_SOFTERR; + mnt->flags &= ~NFS_MOUNT_SOFT; + break; + case Opt_hard: + mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + break; + case Opt_posix: + mnt->flags |= NFS_MOUNT_POSIX; + break; + case Opt_noposix: + mnt->flags &= ~NFS_MOUNT_POSIX; + break; + case Opt_cto: + mnt->flags &= ~NFS_MOUNT_NOCTO; + break; + case Opt_nocto: + mnt->flags |= NFS_MOUNT_NOCTO; + break; + case Opt_ac: + mnt->flags &= ~NFS_MOUNT_NOAC; + break; + case Opt_noac: + mnt->flags |= NFS_MOUNT_NOAC; + break; + case Opt_lock: + mnt->flags &= ~NFS_MOUNT_NONLM; + mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_nolock: + mnt->flags |= NFS_MOUNT_NONLM; + mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_udp: + mnt->flags &= ~NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_tcp: + mnt->flags |= NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_rdma: + mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ + mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(p); + break; + case Opt_acl: + mnt->flags &= ~NFS_MOUNT_NOACL; + break; + case Opt_noacl: + mnt->flags |= NFS_MOUNT_NOACL; + break; + case Opt_rdirplus: + mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; + break; + case Opt_nordirplus: + mnt->flags |= NFS_MOUNT_NORDIRPLUS; + break; + case Opt_sharecache: + mnt->flags &= ~NFS_MOUNT_UNSHARED; + break; + case Opt_nosharecache: + mnt->flags |= NFS_MOUNT_UNSHARED; + break; + case Opt_resvport: + mnt->flags &= ~NFS_MOUNT_NORESVPORT; + break; + case Opt_noresvport: + mnt->flags |= NFS_MOUNT_NORESVPORT; + break; + case Opt_fscache: + mnt->options |= NFS_OPTION_FSCACHE; + kfree(mnt->fscache_uniq); + mnt->fscache_uniq = NULL; + break; + case Opt_nofscache: + mnt->options &= ~NFS_OPTION_FSCACHE; + kfree(mnt->fscache_uniq); + mnt->fscache_uniq = NULL; + break; + case Opt_migration: + mnt->options |= NFS_OPTION_MIGRATION; + break; + case Opt_nomigration: + mnt->options &= ~NFS_OPTION_MIGRATION; + break; + + /* + * options that take numeric values + */ + case Opt_port: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + mnt->nfs_server.port = option; + break; + case Opt_rsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->rsize = option; + break; + case Opt_wsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->wsize = option; + break; + case Opt_bsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->bsize = option; + break; + case Opt_timeo: + if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) + goto out_invalid_value; + mnt->timeo = option; + break; + case Opt_retrans: + if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) + goto out_invalid_value; + mnt->retrans = option; + break; + case Opt_acregmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acregmin = option; + break; + case Opt_acregmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acregmax = option; + break; + case Opt_acdirmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acdirmin = option; + break; + case Opt_acdirmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acdirmax = option; + break; + case Opt_actimeo: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->acregmin = mnt->acregmax = + mnt->acdirmin = mnt->acdirmax = option; + break; + case Opt_namelen: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + mnt->namlen = option; + break; + case Opt_mountport: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + mnt->mount_server.port = option; + break; + case Opt_mountvers: + if (nfs_get_option_ul(args, &option) || + option < NFS_MNT_VERSION || + option > NFS_MNT3_VERSION) + goto out_invalid_value; + mnt->mount_server.version = option; + break; + case Opt_minorversion: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + if (option > NFS4_MAX_MINOR_VERSION) + goto out_invalid_value; + mnt->minorversion = option; + break; + + /* + * options that take text values + */ + case Opt_nfsvers: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_version_string(string, mnt, args); + kfree(string); + if (!rc) + goto out_invalid_value; + break; + case Opt_sec: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_security_flavors(string, mnt); + kfree(string); + if (!rc) { + dfprintk(MOUNT, "NFS: unrecognized " + "security flavor\n"); + return 0; + } + break; + case Opt_proto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + + protofamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + mnt->flags &= ~NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_xprt_tcp6: + protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + mnt->flags |= NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_xprt_rdma6: + protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_rdma: + /* vector side protocols to TCP */ + mnt->flags |= NFS_MOUNT_TCP; + mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(string); + break; + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); + kfree(string); + return 0; + } + kfree(string); + break; + case Opt_mountproto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + kfree(string); + + mountfamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_xprt_tcp6: + mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_xprt_rdma: /* not used for side protocols */ + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); + return 0; + } + break; + case Opt_addr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + mnt->nfs_server.addrlen = + rpc_pton(mnt->net, string, strlen(string), + (struct sockaddr *) + &mnt->nfs_server.address, + sizeof(mnt->nfs_server.address)); + kfree(string); + if (mnt->nfs_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_clientaddr: + if (nfs_get_option_str(args, &mnt->client_address)) + goto out_nomem; + break; + case Opt_mounthost: + if (nfs_get_option_str(args, + &mnt->mount_server.hostname)) + goto out_nomem; + break; + case Opt_mountaddr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + mnt->mount_server.addrlen = + rpc_pton(mnt->net, string, strlen(string), + (struct sockaddr *) + &mnt->mount_server.address, + sizeof(mnt->mount_server.address)); + kfree(string); + if (mnt->mount_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_nconnect: + if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) + goto out_invalid_value; + mnt->nfs_server.nconnect = option; + break; + case Opt_lookupcache: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_lookupcache_tokens, args); + kfree(string); + switch (token) { + case Opt_lookupcache_all: + mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); + break; + case Opt_lookupcache_positive: + mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; + break; + case Opt_lookupcache_none: + mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; + break; + default: + dfprintk(MOUNT, "NFS: invalid " + "lookupcache argument\n"); + return 0; + } + break; + case Opt_fscache_uniq: + if (nfs_get_option_str(args, &mnt->fscache_uniq)) + goto out_nomem; + mnt->options |= NFS_OPTION_FSCACHE; + break; + case Opt_local_lock: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, nfs_local_lock_tokens, + args); + kfree(string); + switch (token) { + case Opt_local_lock_all: + mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_local_lock_flock: + mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; + break; + case Opt_local_lock_posix: + mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; + break; + case Opt_local_lock_none: + mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + default: + dfprintk(MOUNT, "NFS: invalid " + "local_lock argument\n"); + return 0; + } + break; + + /* + * Special options + */ + case Opt_sloppy: + sloppy = 1; + dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); + break; + case Opt_userspace: + case Opt_deprecated: + dfprintk(MOUNT, "NFS: ignoring mount option " + "'%s'\n", p); + break; + + default: + invalid_option = 1; + dfprintk(MOUNT, "NFS: unrecognized mount option " + "'%s'\n", p); + } + } + + if (!sloppy && invalid_option) + return 0; + + if (mnt->minorversion && mnt->version != 4) + goto out_minorversion_mismatch; + + if (mnt->options & NFS_OPTION_MIGRATION && + (mnt->version != 4 || mnt->minorversion != 0)) + goto out_migration_misuse; + + /* + * verify that any proto=/mountproto= options match the address + * families in the addr=/mountaddr= options. + */ + if (protofamily != AF_UNSPEC && + protofamily != mnt->nfs_server.address.ss_family) + goto out_proto_mismatch; + + if (mountfamily != AF_UNSPEC) { + if (mnt->mount_server.addrlen) { + if (mountfamily != mnt->mount_server.address.ss_family) + goto out_mountproto_mismatch; + } else { + if (mountfamily != mnt->nfs_server.address.ss_family) + goto out_mountproto_mismatch; + } + } + + return 1; + +out_mountproto_mismatch: + printk(KERN_INFO "NFS: mount server address does not match mountproto= " + "option\n"); + return 0; +out_proto_mismatch: + printk(KERN_INFO "NFS: server address does not match proto= option\n"); + return 0; +out_invalid_address: + printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); + return 0; +out_invalid_value: + printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + return 0; +out_minorversion_mismatch: + printk(KERN_INFO "NFS: mount option vers=%u does not support " + "minorversion=%u\n", mnt->version, mnt->minorversion); + return 0; +out_migration_misuse: + printk(KERN_INFO + "NFS: 'migration' not supported for this NFS version\n"); + return 0; +out_nomem: + printk(KERN_INFO "NFS: not enough memory to parse option\n"); + return 0; +out_security_failure: + printk(KERN_INFO "NFS: security options invalid: %d\n", rc); + return 0; +} + +/* + * Split "dev_name" into "hostname:export_path". + * + * The leftmost colon demarks the split between the server's hostname + * and the export path. If the hostname starts with a left square + * bracket, then it may contain colons. + * + * Note: caller frees hostname and export path, even on error. + */ +static int nfs_parse_devname(const char *dev_name, + char **hostname, size_t maxnamlen, + char **export_path, size_t maxpathlen) +{ + size_t len; + char *end; + + if (unlikely(!dev_name || !*dev_name)) { + dfprintk(MOUNT, "NFS: device name not specified\n"); + return -EINVAL; + } + + /* Is the host name protected with square brakcets? */ + if (*dev_name == '[') { + end = strchr(++dev_name, ']'); + if (end == NULL || end[1] != ':') + goto out_bad_devname; + + len = end - dev_name; + end++; + } else { + char *comma; + + end = strchr(dev_name, ':'); + if (end == NULL) + goto out_bad_devname; + len = end - dev_name; + + /* kill possible hostname list: not supported */ + comma = strchr(dev_name, ','); + if (comma != NULL && comma < end) + len = comma - dev_name; + } + + if (len > maxnamlen) + goto out_hostname; + + /* N.B. caller will free nfs_server.hostname in all cases */ + *hostname = kstrndup(dev_name, len, GFP_KERNEL); + if (*hostname == NULL) + goto out_nomem; + len = strlen(++end); + if (len > maxpathlen) + goto out_path; + *export_path = kstrndup(end, len, GFP_KERNEL); + if (!*export_path) + goto out_nomem; + + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); + return 0; + +out_bad_devname: + dfprintk(MOUNT, "NFS: device name not in host:path format\n"); + return -EINVAL; + +out_nomem: + dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); + return -ENOMEM; + +out_hostname: + dfprintk(MOUNT, "NFS: server hostname too long\n"); + return -ENAMETOOLONG; + +out_path: + dfprintk(MOUNT, "NFS: export pathname too long\n"); + return -ENAMETOOLONG; +} + +/* + * Validate the NFS2/NFS3 mount data + * - fills in the mount root filehandle + * + * For option strings, user space handles the following behaviors: + * + * + DNS: mapping server host name to IP address ("addr=" option) + * + * + failure mode: how to behave if a mount request can't be handled + * immediately ("fg/bg" option) + * + * + retry: how often to retry a mount request ("retry=" option) + * + * + breaking back: trying proto=udp after proto=tcp, v2 after v3, + * mountproto=tcp after mountproto=udp, and so on + */ +static int nfs23_validate_mount_data(void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + struct nfs_mount_data *data = (struct nfs_mount_data *)options; + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; + + if (data == NULL) + goto out_no_data; + + args->version = NFS_DEFAULT_VERSION; + switch (data->version) { + case 1: + data->namlen = 0; /* fall through */ + case 2: + data->bsize = 0; /* fall through */ + case 3: + if (data->flags & NFS_MOUNT_VER3) + goto out_no_v3; + data->root.size = NFS2_FHSIZE; + memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); + /* Turn off security negotiation */ + extra_flags |= NFS_MOUNT_SECFLAVOUR; + /* fall through */ + case 4: + if (data->flags & NFS_MOUNT_SECFLAVOUR) + goto out_no_sec; + /* fall through */ + case 5: + memset(data->context, 0, sizeof(data->context)); + /* fall through */ + case 6: + if (data->flags & NFS_MOUNT_VER3) { + if (data->root.size > NFS3_FHSIZE || data->root.size == 0) + goto out_invalid_fh; + mntfh->size = data->root.size; + args->version = 3; + } else { + mntfh->size = NFS2_FHSIZE; + args->version = 2; + } + + + memcpy(mntfh->data, data->root.data, mntfh->size); + if (mntfh->size < sizeof(mntfh->data)) + memset(mntfh->data + mntfh->size, 0, + sizeof(mntfh->data) - mntfh->size); + + /* + * Translate to nfs_parsed_mount_data, which nfs_fill_super + * can deal with. + */ + args->flags = data->flags & NFS_MOUNT_FLAGMASK; + args->flags |= extra_flags; + args->rsize = data->rsize; + args->wsize = data->wsize; + args->timeo = data->timeo; + args->retrans = data->retrans; + args->acregmin = data->acregmin; + args->acregmax = data->acregmax; + args->acdirmin = data->acdirmin; + args->acdirmax = data->acdirmax; + args->need_mount = false; + + memcpy(sap, &data->addr, sizeof(data->addr)); + args->nfs_server.addrlen = sizeof(data->addr); + args->nfs_server.port = ntohs(data->addr.sin_port); + if (sap->sa_family != AF_INET || + !nfs_verify_server_address(sap)) + goto out_no_address; + + if (!(data->flags & NFS_MOUNT_TCP)) + args->nfs_server.protocol = XPRT_TRANSPORT_UDP; + /* N.B. caller will free nfs_server.hostname in all cases */ + args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); + args->namlen = data->namlen; + args->bsize = data->bsize; + + if (data->flags & NFS_MOUNT_SECFLAVOUR) + args->selected_flavor = data->pseudoflavor; + else + args->selected_flavor = RPC_AUTH_UNIX; + if (!args->nfs_server.hostname) + goto out_nomem; + + if (!(data->flags & NFS_MOUNT_NONLM)) + args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| + NFS_MOUNT_LOCAL_FCNTL); + else + args->flags |= (NFS_MOUNT_LOCAL_FLOCK| + NFS_MOUNT_LOCAL_FCNTL); + /* + * The legacy version 6 binary mount data from userspace has a + * field used only to transport selinux information into the + * the kernel. To continue to support that functionality we + * have a touch of selinux knowledge here in the NFS code. The + * userspace code converted context=blah to just blah so we are + * converting back to the full string selinux understands. + */ + if (data->context[0]){ +#ifdef CONFIG_SECURITY_SELINUX + int rc; + data->context[NFS_MAX_CONTEXT_LEN] = '\0'; + rc = security_add_mnt_opt("context", data->context, + strlen(data->context), &args->lsm_opts); + if (rc) + return rc; +#else + return -EINVAL; +#endif + } + + break; + default: + return NFS_TEXT_DATA; + } + + return 0; + +out_no_data: + dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); + return -EINVAL; + +out_no_v3: + dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", + data->version); + return -EINVAL; + +out_no_sec: + dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); + return -EINVAL; + +out_nomem: + dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); + return -ENOMEM; + +out_no_address: + dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); + return -EINVAL; + +out_invalid_fh: + dfprintk(MOUNT, "NFS: invalid root filehandle\n"); + return -EINVAL; +} + +#if IS_ENABLED(CONFIG_NFS_V4) + +static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) +{ + args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| + NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); +} + +/* + * Validate NFSv4 mount options + */ +static int nfs4_validate_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name) +{ + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; + char *c; + + if (data == NULL) + goto out_no_data; + + args->version = 4; + + switch (data->version) { + case 1: + if (data->host_addrlen > sizeof(args->nfs_server.address)) + goto out_no_address; + if (data->host_addrlen == 0) + goto out_no_address; + args->nfs_server.addrlen = data->host_addrlen; + if (copy_from_user(sap, data->host_addr, data->host_addrlen)) + return -EFAULT; + if (!nfs_verify_server_address(sap)) + goto out_no_address; + args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); + + if (data->auth_flavourlen) { + rpc_authflavor_t pseudoflavor; + if (data->auth_flavourlen > 1) + goto out_inval_auth; + if (copy_from_user(&pseudoflavor, + data->auth_flavours, + sizeof(pseudoflavor))) + return -EFAULT; + args->selected_flavor = pseudoflavor; + } else + args->selected_flavor = RPC_AUTH_UNIX; + + c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); + if (IS_ERR(c)) + return PTR_ERR(c); + args->nfs_server.hostname = c; + + c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); + if (IS_ERR(c)) + return PTR_ERR(c); + args->nfs_server.export_path = c; + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); + + c = strndup_user(data->client_addr.data, 16); + if (IS_ERR(c)) + return PTR_ERR(c); + args->client_address = c; + + /* + * Translate to nfs_parsed_mount_data, which nfs4_fill_super + * can deal with. + */ + + args->flags = data->flags & NFS4_MOUNT_FLAGMASK; + args->rsize = data->rsize; + args->wsize = data->wsize; + args->timeo = data->timeo; + args->retrans = data->retrans; + args->acregmin = data->acregmin; + args->acregmax = data->acregmax; + args->acdirmin = data->acdirmin; + args->acdirmax = data->acdirmax; + args->nfs_server.protocol = data->proto; + nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + + break; + default: + return NFS_TEXT_DATA; + } + + return 0; + +out_no_data: + dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); + return -EINVAL; + +out_inval_auth: + dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", + data->auth_flavourlen); + return -EINVAL; + +out_no_address: + dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); + return -EINVAL; + +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; +} + +int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + if (fs_type == &nfs_fs_type) + return nfs23_validate_mount_data(options, args, mntfh, dev_name); + return nfs4_validate_mount_data(options, args, dev_name); +} +#else +int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + return nfs23_validate_mount_data(options, args, mntfh, dev_name); +} +#endif + +int nfs_validate_text_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name) +{ + int port = 0; + int max_namelen = PAGE_SIZE; + int max_pathlen = NFS_MAXPATHLEN; + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + + if (nfs_parse_mount_options((char *)options, args) == 0) + return -EINVAL; + + if (!nfs_verify_server_address(sap)) + goto out_no_address; + + if (args->version == 4) { +#if IS_ENABLED(CONFIG_NFS_V4) + if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + else + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + nfs4_validate_mount_flags(args); +#else + goto out_v4_not_compiled; +#endif /* CONFIG_NFS_V4 */ + } else { + nfs_set_mount_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + } + + nfs_set_port(sap, &args->nfs_server.port, port); + + return nfs_parse_devname(dev_name, + &args->nfs_server.hostname, + max_namelen, + &args->nfs_server.export_path, + max_pathlen); + +#if !IS_ENABLED(CONFIG_NFS_V4) +out_v4_not_compiled: + dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); + return -EPROTONOSUPPORT; +#else +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; +#endif /* !CONFIG_NFS_V4 */ + +out_no_address: + dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); + return -EINVAL; +} diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index a467e43fc682..28ab31fc5aa6 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -7,6 +7,7 @@ #include #include #include +#include #include #include @@ -224,6 +225,22 @@ extern const struct svc_version nfs4_callback_version1; extern const struct svc_version nfs4_callback_version4; struct nfs_pageio_descriptor; + +/* mount.c */ +#define NFS_TEXT_DATA 1 + +extern struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void); +extern void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data); +extern int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt); +extern int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name); +extern int nfs_validate_text_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name); + /* pagelist.c */ extern int __init nfs_init_nfspagecache(void); extern void nfs_destroy_nfspagecache(void); @@ -765,3 +782,16 @@ static inline bool nfs_error_is_fatal_on_server(int err) } return nfs_error_is_fatal(err); } + +/* + * Select between a default port value and a user-specified port value. + * If a zero value is set, then autobind will be used. + */ +static inline void nfs_set_port(struct sockaddr *sap, int *port, + const unsigned short default_port) +{ + if (*port == NFS_UNSPEC_PORT) + *port = default_port; + + rpc_set_port(sap, *port); +} diff --git a/fs/nfs/super.c b/fs/nfs/super.c index de00f89dbe6e..b07585f62c65 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -69,229 +69,6 @@ #include "nfs.h" #define NFSDBG_FACILITY NFSDBG_VFS -#define NFS_TEXT_DATA 1 - -#if IS_ENABLED(CONFIG_NFS_V3) -#define NFS_DEFAULT_VERSION 3 -#else -#define NFS_DEFAULT_VERSION 2 -#endif - -#define NFS_MAX_CONNECTIONS 16 - -enum { - /* Mount options that take no arguments */ - Opt_soft, Opt_softerr, Opt_hard, - Opt_posix, Opt_noposix, - Opt_cto, Opt_nocto, - Opt_ac, Opt_noac, - Opt_lock, Opt_nolock, - Opt_udp, Opt_tcp, Opt_rdma, - Opt_acl, Opt_noacl, - Opt_rdirplus, Opt_nordirplus, - Opt_sharecache, Opt_nosharecache, - Opt_resvport, Opt_noresvport, - Opt_fscache, Opt_nofscache, - Opt_migration, Opt_nomigration, - - /* Mount options that take integer arguments */ - Opt_port, - Opt_rsize, Opt_wsize, Opt_bsize, - Opt_timeo, Opt_retrans, - Opt_acregmin, Opt_acregmax, - Opt_acdirmin, Opt_acdirmax, - Opt_actimeo, - Opt_namelen, - Opt_mountport, - Opt_mountvers, - Opt_minorversion, - - /* Mount options that take string arguments */ - Opt_nfsvers, - Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, - Opt_addr, Opt_mountaddr, Opt_clientaddr, - Opt_nconnect, - Opt_lookupcache, - Opt_fscache_uniq, - Opt_local_lock, - - /* Special mount options */ - Opt_userspace, Opt_deprecated, Opt_sloppy, - - Opt_err -}; - -static const match_table_t nfs_mount_option_tokens = { - { Opt_userspace, "bg" }, - { Opt_userspace, "fg" }, - { Opt_userspace, "retry=%s" }, - - { Opt_sloppy, "sloppy" }, - - { Opt_soft, "soft" }, - { Opt_softerr, "softerr" }, - { Opt_hard, "hard" }, - { Opt_deprecated, "intr" }, - { Opt_deprecated, "nointr" }, - { Opt_posix, "posix" }, - { Opt_noposix, "noposix" }, - { Opt_cto, "cto" }, - { Opt_nocto, "nocto" }, - { Opt_ac, "ac" }, - { Opt_noac, "noac" }, - { Opt_lock, "lock" }, - { Opt_nolock, "nolock" }, - { Opt_udp, "udp" }, - { Opt_tcp, "tcp" }, - { Opt_rdma, "rdma" }, - { Opt_acl, "acl" }, - { Opt_noacl, "noacl" }, - { Opt_rdirplus, "rdirplus" }, - { Opt_nordirplus, "nordirplus" }, - { Opt_sharecache, "sharecache" }, - { Opt_nosharecache, "nosharecache" }, - { Opt_resvport, "resvport" }, - { Opt_noresvport, "noresvport" }, - { Opt_fscache, "fsc" }, - { Opt_nofscache, "nofsc" }, - { Opt_migration, "migration" }, - { Opt_nomigration, "nomigration" }, - - { Opt_port, "port=%s" }, - { Opt_rsize, "rsize=%s" }, - { Opt_wsize, "wsize=%s" }, - { Opt_bsize, "bsize=%s" }, - { Opt_timeo, "timeo=%s" }, - { Opt_retrans, "retrans=%s" }, - { Opt_acregmin, "acregmin=%s" }, - { Opt_acregmax, "acregmax=%s" }, - { Opt_acdirmin, "acdirmin=%s" }, - { Opt_acdirmax, "acdirmax=%s" }, - { Opt_actimeo, "actimeo=%s" }, - { Opt_namelen, "namlen=%s" }, - { Opt_mountport, "mountport=%s" }, - { Opt_mountvers, "mountvers=%s" }, - { Opt_minorversion, "minorversion=%s" }, - - { Opt_nfsvers, "nfsvers=%s" }, - { Opt_nfsvers, "vers=%s" }, - - { Opt_sec, "sec=%s" }, - { Opt_proto, "proto=%s" }, - { Opt_mountproto, "mountproto=%s" }, - { Opt_addr, "addr=%s" }, - { Opt_clientaddr, "clientaddr=%s" }, - { Opt_mounthost, "mounthost=%s" }, - { Opt_mountaddr, "mountaddr=%s" }, - - { Opt_nconnect, "nconnect=%s" }, - - { Opt_lookupcache, "lookupcache=%s" }, - { Opt_fscache_uniq, "fsc=%s" }, - { Opt_local_lock, "local_lock=%s" }, - - /* The following needs to be listed after all other options */ - { Opt_nfsvers, "v%s" }, - - { Opt_err, NULL } -}; - -enum { - Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, - Opt_xprt_rdma6, - - Opt_xprt_err -}; - -static const match_table_t nfs_xprt_protocol_tokens = { - { Opt_xprt_udp, "udp" }, - { Opt_xprt_udp6, "udp6" }, - { Opt_xprt_tcp, "tcp" }, - { Opt_xprt_tcp6, "tcp6" }, - { Opt_xprt_rdma, "rdma" }, - { Opt_xprt_rdma6, "rdma6" }, - - { Opt_xprt_err, NULL } -}; - -enum { - Opt_sec_none, Opt_sec_sys, - Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, - Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, - Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, - - Opt_sec_err -}; - -static const match_table_t nfs_secflavor_tokens = { - { Opt_sec_none, "none" }, - { Opt_sec_none, "null" }, - { Opt_sec_sys, "sys" }, - - { Opt_sec_krb5, "krb5" }, - { Opt_sec_krb5i, "krb5i" }, - { Opt_sec_krb5p, "krb5p" }, - - { Opt_sec_lkey, "lkey" }, - { Opt_sec_lkeyi, "lkeyi" }, - { Opt_sec_lkeyp, "lkeyp" }, - - { Opt_sec_spkm, "spkm3" }, - { Opt_sec_spkmi, "spkm3i" }, - { Opt_sec_spkmp, "spkm3p" }, - - { Opt_sec_err, NULL } -}; - -enum { - Opt_lookupcache_all, Opt_lookupcache_positive, - Opt_lookupcache_none, - - Opt_lookupcache_err -}; - -static match_table_t nfs_lookupcache_tokens = { - { Opt_lookupcache_all, "all" }, - { Opt_lookupcache_positive, "pos" }, - { Opt_lookupcache_positive, "positive" }, - { Opt_lookupcache_none, "none" }, - - { Opt_lookupcache_err, NULL } -}; - -enum { - Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, - Opt_local_lock_none, - - Opt_local_lock_err -}; - -static match_table_t nfs_local_lock_tokens = { - { Opt_local_lock_all, "all" }, - { Opt_local_lock_flock, "flock" }, - { Opt_local_lock_posix, "posix" }, - { Opt_local_lock_none, "none" }, - - { Opt_local_lock_err, NULL } -}; - -enum { - Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, - Opt_vers_4_1, Opt_vers_4_2, - - Opt_vers_err -}; - -static match_table_t nfs_vers_tokens = { - { Opt_vers_2, "2" }, - { Opt_vers_3, "3" }, - { Opt_vers_4, "4" }, - { Opt_vers_4_0, "4.0" }, - { Opt_vers_4_1, "4.1" }, - { Opt_vers_4_2, "4.2" }, - - { Opt_vers_err, NULL } -}; static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); @@ -332,10 +109,6 @@ const struct super_operations nfs_sops = { EXPORT_SYMBOL_GPL(nfs_sops); #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); -static int nfs4_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, const char *dev_name); - struct file_system_type nfs4_fs_type = { .owner = THIS_MODULE, .name = "nfs4", @@ -932,141 +705,6 @@ void nfs_umount_begin(struct super_block *sb) } EXPORT_SYMBOL_GPL(nfs_umount_begin); -static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) -{ - struct nfs_parsed_mount_data *data; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (data) { - data->timeo = NFS_UNSPEC_TIMEO; - data->retrans = NFS_UNSPEC_RETRANS; - data->acregmin = NFS_DEF_ACREGMIN; - data->acregmax = NFS_DEF_ACREGMAX; - data->acdirmin = NFS_DEF_ACDIRMIN; - data->acdirmax = NFS_DEF_ACDIRMAX; - data->mount_server.port = NFS_UNSPEC_PORT; - data->nfs_server.port = NFS_UNSPEC_PORT; - data->nfs_server.protocol = XPRT_TRANSPORT_TCP; - data->selected_flavor = RPC_AUTH_MAXFLAVOR; - data->minorversion = 0; - data->need_mount = true; - data->net = current->nsproxy->net_ns; - data->lsm_opts = NULL; - } - return data; -} - -static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) -{ - if (data) { - kfree(data->client_address); - kfree(data->mount_server.hostname); - kfree(data->nfs_server.export_path); - kfree(data->nfs_server.hostname); - kfree(data->fscache_uniq); - security_free_mnt_opts(&data->lsm_opts); - kfree(data); - } -} - -/* - * Sanity-check a server address provided by the mount command. - * - * Address family must be initialized, and address must not be - * the ANY address for that family. - */ -static int nfs_verify_server_address(struct sockaddr *addr) -{ - switch (addr->sa_family) { - case AF_INET: { - struct sockaddr_in *sa = (struct sockaddr_in *)addr; - return sa->sin_addr.s_addr != htonl(INADDR_ANY); - } - case AF_INET6: { - struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; - return !ipv6_addr_any(sa); - } - } - - dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); - return 0; -} - -/* - * Select between a default port value and a user-specified port value. - * If a zero value is set, then autobind will be used. - */ -static void nfs_set_port(struct sockaddr *sap, int *port, - const unsigned short default_port) -{ - if (*port == NFS_UNSPEC_PORT) - *port = default_port; - - rpc_set_port(sap, *port); -} - -/* - * Sanity check the NFS transport protocol. - * - */ -static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) -{ - switch (mnt->nfs_server.protocol) { - case XPRT_TRANSPORT_UDP: - case XPRT_TRANSPORT_TCP: - case XPRT_TRANSPORT_RDMA: - break; - default: - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - } -} - -/* - * For text based NFSv2/v3 mounts, the mount protocol transport default - * settings should depend upon the specified NFS transport. - */ -static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) -{ - nfs_validate_transport_protocol(mnt); - - if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || - mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) - return; - switch (mnt->nfs_server.protocol) { - case XPRT_TRANSPORT_UDP: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; - break; - case XPRT_TRANSPORT_TCP: - case XPRT_TRANSPORT_RDMA: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; - } -} - -/* - * Add 'flavor' to 'auth_info' if not already present. - * Returns true if 'flavor' ends up in the list, false otherwise - */ -static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, - rpc_authflavor_t flavor) -{ - unsigned int i; - unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); - - /* make sure this flavor isn't already in the list */ - for (i = 0; i < auth_info->flavor_len; i++) { - if (flavor == auth_info->flavors[i]) - return true; - } - - if (auth_info->flavor_len + 1 >= max_flavor_len) { - dfprintk(MOUNT, "NFS: too many sec= flavors\n"); - return false; - } - - auth_info->flavors[auth_info->flavor_len++] = flavor; - return true; -} - /* * Return true if 'match' is in auth_info or auth_info is empty. * Return false otherwise. @@ -1087,627 +725,6 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, } EXPORT_SYMBOL_GPL(nfs_auth_info_match); -/* - * Parse the value of the 'sec=' option. - */ -static int nfs_parse_security_flavors(char *value, - struct nfs_parsed_mount_data *mnt) -{ - substring_t args[MAX_OPT_ARGS]; - rpc_authflavor_t pseudoflavor; - char *p; - - dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); - - while ((p = strsep(&value, ":")) != NULL) { - switch (match_token(p, nfs_secflavor_tokens, args)) { - case Opt_sec_none: - pseudoflavor = RPC_AUTH_NULL; - break; - case Opt_sec_sys: - pseudoflavor = RPC_AUTH_UNIX; - break; - case Opt_sec_krb5: - pseudoflavor = RPC_AUTH_GSS_KRB5; - break; - case Opt_sec_krb5i: - pseudoflavor = RPC_AUTH_GSS_KRB5I; - break; - case Opt_sec_krb5p: - pseudoflavor = RPC_AUTH_GSS_KRB5P; - break; - case Opt_sec_lkey: - pseudoflavor = RPC_AUTH_GSS_LKEY; - break; - case Opt_sec_lkeyi: - pseudoflavor = RPC_AUTH_GSS_LKEYI; - break; - case Opt_sec_lkeyp: - pseudoflavor = RPC_AUTH_GSS_LKEYP; - break; - case Opt_sec_spkm: - pseudoflavor = RPC_AUTH_GSS_SPKM; - break; - case Opt_sec_spkmi: - pseudoflavor = RPC_AUTH_GSS_SPKMI; - break; - case Opt_sec_spkmp: - pseudoflavor = RPC_AUTH_GSS_SPKMP; - break; - default: - dfprintk(MOUNT, - "NFS: sec= option '%s' not recognized\n", p); - return 0; - } - - if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) - return 0; - } - - return 1; -} - -static int nfs_parse_version_string(char *string, - struct nfs_parsed_mount_data *mnt, - substring_t *args) -{ - mnt->flags &= ~NFS_MOUNT_VER3; - switch (match_token(string, nfs_vers_tokens, args)) { - case Opt_vers_2: - mnt->version = 2; - break; - case Opt_vers_3: - mnt->flags |= NFS_MOUNT_VER3; - mnt->version = 3; - break; - case Opt_vers_4: - /* Backward compatibility option. In future, - * the mount program should always supply - * a NFSv4 minor version number. - */ - mnt->version = 4; - break; - case Opt_vers_4_0: - mnt->version = 4; - mnt->minorversion = 0; - break; - case Opt_vers_4_1: - mnt->version = 4; - mnt->minorversion = 1; - break; - case Opt_vers_4_2: - mnt->version = 4; - mnt->minorversion = 2; - break; - default: - return 0; - } - return 1; -} - -static int nfs_get_option_str(substring_t args[], char **option) -{ - kfree(*option); - *option = match_strdup(args); - return !*option; -} - -static int nfs_get_option_ul(substring_t args[], unsigned long *option) -{ - int rc; - char *string; - - string = match_strdup(args); - if (string == NULL) - return -ENOMEM; - rc = kstrtoul(string, 10, option); - kfree(string); - - return rc; -} - -static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, - unsigned long l_bound, unsigned long u_bound) -{ - int ret; - - ret = nfs_get_option_ul(args, option); - if (ret != 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - -/* - * Error-check and convert a string of mount options from user space into - * a data structure. The whole mount string is processed; bad options are - * skipped as they are encountered. If there were no errors, return 1; - * otherwise return 0 (zero). - */ -static int nfs_parse_mount_options(char *raw, - struct nfs_parsed_mount_data *mnt) -{ - char *p, *string; - int rc, sloppy = 0, invalid_option = 0; - unsigned short protofamily = AF_UNSPEC; - unsigned short mountfamily = AF_UNSPEC; - - if (!raw) { - dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); - return 1; - } - dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - - rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); - if (rc) - goto out_security_failure; - - while ((p = strsep(&raw, ",")) != NULL) { - substring_t args[MAX_OPT_ARGS]; - unsigned long option; - int token; - - if (!*p) - continue; - - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); - - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { - - /* - * boolean options: foo/nofoo - */ - case Opt_soft: - mnt->flags |= NFS_MOUNT_SOFT; - mnt->flags &= ~NFS_MOUNT_SOFTERR; - break; - case Opt_softerr: - mnt->flags |= NFS_MOUNT_SOFTERR; - mnt->flags &= ~NFS_MOUNT_SOFT; - break; - case Opt_hard: - mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); - break; - case Opt_posix: - mnt->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - mnt->flags &= ~NFS_MOUNT_POSIX; - break; - case Opt_cto: - mnt->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - mnt->flags |= NFS_MOUNT_NOCTO; - break; - case Opt_ac: - mnt->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - mnt->flags |= NFS_MOUNT_NOAC; - break; - case Opt_lock: - mnt->flags &= ~NFS_MOUNT_NONLM; - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - mnt->flags |= NFS_MOUNT_NONLM; - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_rdma: - mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); - break; - case Opt_acl: - mnt->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - mnt->flags |= NFS_MOUNT_NOACL; - break; - case Opt_rdirplus: - mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - mnt->flags |= NFS_MOUNT_NORDIRPLUS; - break; - case Opt_sharecache: - mnt->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - mnt->flags |= NFS_MOUNT_UNSHARED; - break; - case Opt_resvport: - mnt->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - mnt->flags |= NFS_MOUNT_NORESVPORT; - break; - case Opt_fscache: - mnt->options |= NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; - break; - case Opt_nofscache: - mnt->options &= ~NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; - break; - case Opt_migration: - mnt->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - mnt->options &= ~NFS_OPTION_MIGRATION; - break; - - /* - * options that take numeric values - */ - case Opt_port: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - mnt->nfs_server.port = option; - break; - case Opt_rsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->rsize = option; - break; - case Opt_wsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->wsize = option; - break; - case Opt_bsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->bsize = option; - break; - case Opt_timeo: - if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) - goto out_invalid_value; - mnt->timeo = option; - break; - case Opt_retrans: - if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) - goto out_invalid_value; - mnt->retrans = option; - break; - case Opt_acregmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acregmin = option; - break; - case Opt_acregmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acregmax = option; - break; - case Opt_acdirmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acdirmin = option; - break; - case Opt_acdirmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acdirmax = option; - break; - case Opt_actimeo: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->acregmin = mnt->acregmax = - mnt->acdirmin = mnt->acdirmax = option; - break; - case Opt_namelen: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - mnt->namlen = option; - break; - case Opt_mountport: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - mnt->mount_server.port = option; - break; - case Opt_mountvers: - if (nfs_get_option_ul(args, &option) || - option < NFS_MNT_VERSION || - option > NFS_MNT3_VERSION) - goto out_invalid_value; - mnt->mount_server.version = option; - break; - case Opt_minorversion: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - if (option > NFS4_MAX_MINOR_VERSION) - goto out_invalid_value; - mnt->minorversion = option; - break; - - /* - * options that take text values - */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_version_string(string, mnt, args); - kfree(string); - if (!rc) - goto out_invalid_value; - break; - case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_security_flavors(string, mnt); - kfree(string); - if (!rc) { - dfprintk(MOUNT, "NFS: unrecognized " - "security flavor\n"); - return 0; - } - break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); - - protofamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma6: - protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_rdma: - /* vector side protocols to TCP */ - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); - break; - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - kfree(string); - return 0; - } - kfree(string); - break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); - kfree(string); - - mountfamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma: /* not used for side protocols */ - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - return 0; - } - break; - case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - mnt->nfs_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), - (struct sockaddr *) - &mnt->nfs_server.address, - sizeof(mnt->nfs_server.address)); - kfree(string); - if (mnt->nfs_server.addrlen == 0) - goto out_invalid_address; - break; - case Opt_clientaddr: - if (nfs_get_option_str(args, &mnt->client_address)) - goto out_nomem; - break; - case Opt_mounthost: - if (nfs_get_option_str(args, - &mnt->mount_server.hostname)) - goto out_nomem; - break; - case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - mnt->mount_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), - (struct sockaddr *) - &mnt->mount_server.address, - sizeof(mnt->mount_server.address)); - kfree(string); - if (mnt->mount_server.addrlen == 0) - goto out_invalid_address; - break; - case Opt_nconnect: - if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; - mnt->nfs_server.nconnect = option; - break; - case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { - case Opt_lookupcache_all: - mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); - break; - case Opt_lookupcache_positive: - mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; - break; - case Opt_lookupcache_none: - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "lookupcache argument\n"); - return 0; - } - break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &mnt->fscache_uniq)) - goto out_nomem; - mnt->options |= NFS_OPTION_FSCACHE; - break; - case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, - args); - kfree(string); - switch (token) { - case Opt_local_lock_all: - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_local_lock_flock: - mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; - break; - case Opt_local_lock_posix: - mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; - break; - case Opt_local_lock_none: - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "local_lock argument\n"); - return 0; - } - break; - - /* - * Special options - */ - case Opt_sloppy: - sloppy = 1; - dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); - break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option " - "'%s'\n", p); - break; - - default: - invalid_option = 1; - dfprintk(MOUNT, "NFS: unrecognized mount option " - "'%s'\n", p); - } - } - - if (!sloppy && invalid_option) - return 0; - - if (mnt->minorversion && mnt->version != 4) - goto out_minorversion_mismatch; - - if (mnt->options & NFS_OPTION_MIGRATION && - (mnt->version != 4 || mnt->minorversion != 0)) - goto out_migration_misuse; - - /* - * verify that any proto=/mountproto= options match the address - * families in the addr=/mountaddr= options. - */ - if (protofamily != AF_UNSPEC && - protofamily != mnt->nfs_server.address.ss_family) - goto out_proto_mismatch; - - if (mountfamily != AF_UNSPEC) { - if (mnt->mount_server.addrlen) { - if (mountfamily != mnt->mount_server.address.ss_family) - goto out_mountproto_mismatch; - } else { - if (mountfamily != mnt->nfs_server.address.ss_family) - goto out_mountproto_mismatch; - } - } - - return 1; - -out_mountproto_mismatch: - printk(KERN_INFO "NFS: mount server address does not match mountproto= " - "option\n"); - return 0; -out_proto_mismatch: - printk(KERN_INFO "NFS: server address does not match proto= option\n"); - return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return 0; -out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); - return 0; -out_minorversion_mismatch: - printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", mnt->version, mnt->minorversion); - return 0; -out_migration_misuse: - printk(KERN_INFO - "NFS: 'migration' not supported for this NFS version\n"); - return 0; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return 0; -out_security_failure: - printk(KERN_INFO "NFS: security options invalid: %d\n", rc); - return 0; -} - /* * Ensure that a specified authtype in args->auth_info is supported by * the server. Returns 0 and sets args->selected_flavor if it's ok, and @@ -1908,327 +925,6 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, } EXPORT_SYMBOL_GPL(nfs_try_mount); -/* - * Split "dev_name" into "hostname:export_path". - * - * The leftmost colon demarks the split between the server's hostname - * and the export path. If the hostname starts with a left square - * bracket, then it may contain colons. - * - * Note: caller frees hostname and export path, even on error. - */ -static int nfs_parse_devname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) -{ - size_t len; - char *end; - - if (unlikely(!dev_name || !*dev_name)) { - dfprintk(MOUNT, "NFS: device name not specified\n"); - return -EINVAL; - } - - /* Is the host name protected with square brakcets? */ - if (*dev_name == '[') { - end = strchr(++dev_name, ']'); - if (end == NULL || end[1] != ':') - goto out_bad_devname; - - len = end - dev_name; - end++; - } else { - char *comma; - - end = strchr(dev_name, ':'); - if (end == NULL) - goto out_bad_devname; - len = end - dev_name; - - /* kill possible hostname list: not supported */ - comma = strchr(dev_name, ','); - if (comma != NULL && comma < end) - len = comma - dev_name; - } - - if (len > maxnamlen) - goto out_hostname; - - /* N.B. caller will free nfs_server.hostname in all cases */ - *hostname = kstrndup(dev_name, len, GFP_KERNEL); - if (*hostname == NULL) - goto out_nomem; - len = strlen(++end); - if (len > maxpathlen) - goto out_path; - *export_path = kstrndup(end, len, GFP_KERNEL); - if (!*export_path) - goto out_nomem; - - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); - return 0; - -out_bad_devname: - dfprintk(MOUNT, "NFS: device name not in host:path format\n"); - return -EINVAL; - -out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); - return -ENOMEM; - -out_hostname: - dfprintk(MOUNT, "NFS: server hostname too long\n"); - return -ENAMETOOLONG; - -out_path: - dfprintk(MOUNT, "NFS: export pathname too long\n"); - return -ENAMETOOLONG; -} - -/* - * Validate the NFS2/NFS3 mount data - * - fills in the mount root filehandle - * - * For option strings, user space handles the following behaviors: - * - * + DNS: mapping server host name to IP address ("addr=" option) - * - * + failure mode: how to behave if a mount request can't be handled - * immediately ("fg/bg" option) - * - * + retry: how often to retry a mount request ("retry=" option) - * - * + breaking back: trying proto=udp after proto=tcp, v2 after v3, - * mountproto=tcp after mountproto=udp, and so on - */ -static int nfs23_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) -{ - struct nfs_mount_data *data = (struct nfs_mount_data *)options; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; - - if (data == NULL) - goto out_no_data; - - args->version = NFS_DEFAULT_VERSION; - switch (data->version) { - case 1: - data->namlen = 0; /* fall through */ - case 2: - data->bsize = 0; /* fall through */ - case 3: - if (data->flags & NFS_MOUNT_VER3) - goto out_no_v3; - data->root.size = NFS2_FHSIZE; - memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); - /* Turn off security negotiation */ - extra_flags |= NFS_MOUNT_SECFLAVOUR; - /* fall through */ - case 4: - if (data->flags & NFS_MOUNT_SECFLAVOUR) - goto out_no_sec; - /* fall through */ - case 5: - memset(data->context, 0, sizeof(data->context)); - /* fall through */ - case 6: - if (data->flags & NFS_MOUNT_VER3) { - if (data->root.size > NFS3_FHSIZE || data->root.size == 0) - goto out_invalid_fh; - mntfh->size = data->root.size; - args->version = 3; - } else { - mntfh->size = NFS2_FHSIZE; - args->version = 2; - } - - - memcpy(mntfh->data, data->root.data, mntfh->size); - if (mntfh->size < sizeof(mntfh->data)) - memset(mntfh->data + mntfh->size, 0, - sizeof(mntfh->data) - mntfh->size); - - /* - * Translate to nfs_parsed_mount_data, which nfs_fill_super - * can deal with. - */ - args->flags = data->flags & NFS_MOUNT_FLAGMASK; - args->flags |= extra_flags; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->need_mount = false; - - memcpy(sap, &data->addr, sizeof(data->addr)); - args->nfs_server.addrlen = sizeof(data->addr); - args->nfs_server.port = ntohs(data->addr.sin_port); - if (sap->sa_family != AF_INET || - !nfs_verify_server_address(sap)) - goto out_no_address; - - if (!(data->flags & NFS_MOUNT_TCP)) - args->nfs_server.protocol = XPRT_TRANSPORT_UDP; - /* N.B. caller will free nfs_server.hostname in all cases */ - args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); - args->namlen = data->namlen; - args->bsize = data->bsize; - - if (data->flags & NFS_MOUNT_SECFLAVOUR) - args->selected_flavor = data->pseudoflavor; - else - args->selected_flavor = RPC_AUTH_UNIX; - if (!args->nfs_server.hostname) - goto out_nomem; - - if (!(data->flags & NFS_MOUNT_NONLM)) - args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| - NFS_MOUNT_LOCAL_FCNTL); - else - args->flags |= (NFS_MOUNT_LOCAL_FLOCK| - NFS_MOUNT_LOCAL_FCNTL); - /* - * The legacy version 6 binary mount data from userspace has a - * field used only to transport selinux information into the - * the kernel. To continue to support that functionality we - * have a touch of selinux knowledge here in the NFS code. The - * userspace code converted context=blah to just blah so we are - * converting back to the full string selinux understands. - */ - if (data->context[0]){ -#ifdef CONFIG_SECURITY_SELINUX - int rc; - data->context[NFS_MAX_CONTEXT_LEN] = '\0'; - rc = security_add_mnt_opt("context", data->context, - strlen(data->context), &args->lsm_opts); - if (rc) - return rc; -#else - return -EINVAL; -#endif - } - - break; - default: - return NFS_TEXT_DATA; - } - - return 0; - -out_no_data: - dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); - return -EINVAL; - -out_no_v3: - dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", - data->version); - return -EINVAL; - -out_no_sec: - dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); - return -EINVAL; - -out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); - return -ENOMEM; - -out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; - -out_invalid_fh: - dfprintk(MOUNT, "NFS: invalid root filehandle\n"); - return -EINVAL; -} - -#if IS_ENABLED(CONFIG_NFS_V4) -static int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) -{ - if (fs_type == &nfs_fs_type) - return nfs23_validate_mount_data(options, args, mntfh, dev_name); - return nfs4_validate_mount_data(options, args, dev_name); -} -#else -static int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) -{ - return nfs23_validate_mount_data(options, args, mntfh, dev_name); -} -#endif - -static int nfs_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, - const char *dev_name) -{ - int port = 0; - int max_namelen = PAGE_SIZE; - int max_pathlen = NFS_MAXPATHLEN; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - - if (nfs_parse_mount_options((char *)options, args) == 0) - return -EINVAL; - - if (!nfs_verify_server_address(sap)) - goto out_no_address; - - if (args->version == 4) { -#if IS_ENABLED(CONFIG_NFS_V4) - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - else - port = NFS_PORT; - max_namelen = NFS4_MAXNAMLEN; - max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - nfs4_validate_mount_flags(args); -#else - goto out_v4_not_compiled; -#endif /* CONFIG_NFS_V4 */ - } else { - nfs_set_mount_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - } - - nfs_set_port(sap, &args->nfs_server.port, port); - - return nfs_parse_devname(dev_name, - &args->nfs_server.hostname, - max_namelen, - &args->nfs_server.export_path, - max_pathlen); - -#if !IS_ENABLED(CONFIG_NFS_V4) -out_v4_not_compiled: - dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); - return -EPROTONOSUPPORT; -#else -out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; -#endif /* !CONFIG_NFS_V4 */ - -out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; -} - #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ | NFS_MOUNT_SECURE \ | NFS_MOUNT_TCP \ @@ -2735,113 +1431,6 @@ nfs_prepared_mount(struct file_system_type *fs_type, int flags, #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) -{ - args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| - NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); -} - -/* - * Validate NFSv4 mount options - */ -static int nfs4_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, - const char *dev_name) -{ - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; - char *c; - - if (data == NULL) - goto out_no_data; - - args->version = 4; - - switch (data->version) { - case 1: - if (data->host_addrlen > sizeof(args->nfs_server.address)) - goto out_no_address; - if (data->host_addrlen == 0) - goto out_no_address; - args->nfs_server.addrlen = data->host_addrlen; - if (copy_from_user(sap, data->host_addr, data->host_addrlen)) - return -EFAULT; - if (!nfs_verify_server_address(sap)) - goto out_no_address; - args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); - - if (data->auth_flavourlen) { - rpc_authflavor_t pseudoflavor; - if (data->auth_flavourlen > 1) - goto out_inval_auth; - if (copy_from_user(&pseudoflavor, - data->auth_flavours, - sizeof(pseudoflavor))) - return -EFAULT; - args->selected_flavor = pseudoflavor; - } else - args->selected_flavor = RPC_AUTH_UNIX; - - c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); - if (IS_ERR(c)) - return PTR_ERR(c); - args->nfs_server.hostname = c; - - c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); - if (IS_ERR(c)) - return PTR_ERR(c); - args->nfs_server.export_path = c; - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); - - c = strndup_user(data->client_addr.data, 16); - if (IS_ERR(c)) - return PTR_ERR(c); - args->client_address = c; - - /* - * Translate to nfs_parsed_mount_data, which nfs4_fill_super - * can deal with. - */ - - args->flags = data->flags & NFS4_MOUNT_FLAGMASK; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->nfs_server.protocol = data->proto; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - - break; - default: - return NFS_TEXT_DATA; - } - - return 0; - -out_no_data: - dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); - return -EINVAL; - -out_inval_auth: - dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", - data->auth_flavourlen); - return -EINVAL; - -out_no_address: - dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); - return -EINVAL; - -out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; -} - /* * NFS v4 module parameters need to stay in the * NFS client for backwards compatibility -- cgit v1.2.3-59-g8ed1b From e0a626b1247496971dfbed35d104f77e286c70bb Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:05 -0500 Subject: NFS: Constify mount argument match tables The mount argument match tables should never be altered so constify them. Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index c8f99a3c7264..8fbfd526d6b8 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -199,7 +199,7 @@ enum { Opt_lookupcache_err }; -static match_table_t nfs_lookupcache_tokens = { +static const match_table_t nfs_lookupcache_tokens = { { Opt_lookupcache_all, "all" }, { Opt_lookupcache_positive, "pos" }, { Opt_lookupcache_positive, "positive" }, @@ -215,7 +215,7 @@ enum { Opt_local_lock_err }; -static match_table_t nfs_local_lock_tokens = { +static const match_table_t nfs_local_lock_tokens = { { Opt_local_lock_all, "all" }, { Opt_local_lock_flock, "flock" }, { Opt_local_lock_posix, "posix" }, @@ -231,7 +231,7 @@ enum { Opt_vers_err }; -static match_table_t nfs_vers_tokens = { +static const match_table_t nfs_vers_tokens = { { Opt_vers_2, "2" }, { Opt_vers_3, "3" }, { Opt_vers_4, "4" }, -- cgit v1.2.3-59-g8ed1b From 5eb005caf5383dd328199f0f2114cd7dad731d3d Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:06 -0500 Subject: NFS: Rename struct nfs_parsed_mount_data to struct nfs_fs_context Rename struct nfs_parsed_mount_data to struct nfs_fs_context and rename pointers to it to "ctx". At some point this will be pointed to by an fs_context struct's fs_private pointer. Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/client.c | 66 ++++---- fs/nfs/fs_context.c | 446 ++++++++++++++++++++++++++-------------------------- fs/nfs/internal.h | 14 +- fs/nfs/nfs4client.c | 60 +++---- fs/nfs/nfs4super.c | 6 +- fs/nfs/super.c | 194 ++++++++++++----------- 6 files changed, 393 insertions(+), 393 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index a2049747adc4..0a00df8e71bb 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -658,28 +658,28 @@ EXPORT_SYMBOL_GPL(nfs_init_client); * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_parsed_mount_data *data, + const struct nfs_fs_context *cfg, struct nfs_subversion *nfs_mod) { struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { - .hostname = data->nfs_server.hostname, - .addr = (const struct sockaddr *)&data->nfs_server.address, - .addrlen = data->nfs_server.addrlen, + .hostname = cfg->nfs_server.hostname, + .addr = (const struct sockaddr *)&cfg->nfs_server.address, + .addrlen = cfg->nfs_server.addrlen, .nfs_mod = nfs_mod, - .proto = data->nfs_server.protocol, - .net = data->net, + .proto = cfg->nfs_server.protocol, + .net = cfg->net, .timeparms = &timeparms, .cred = server->cred, - .nconnect = data->nfs_server.nconnect, + .nconnect = cfg->nfs_server.nconnect, .init_flags = (1UL << NFS_CS_REUSEPORT), }; struct nfs_client *clp; int error; - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); - if (data->flags & NFS_MOUNT_NORESVPORT) + nfs_init_timeout_values(&timeparms, cfg->nfs_server.protocol, + cfg->timeo, cfg->retrans); + if (cfg->flags & NFS_MOUNT_NORESVPORT) set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ @@ -690,46 +690,46 @@ static int nfs_init_server(struct nfs_server *server, server->nfs_client = clp; /* Initialise the client representation from the mount data */ - server->flags = data->flags; - server->options = data->options; + server->flags = cfg->flags; + server->options = cfg->options; server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; - if (data->rsize) - server->rsize = nfs_block_size(data->rsize, NULL); - if (data->wsize) - server->wsize = nfs_block_size(data->wsize, NULL); + if (cfg->rsize) + server->rsize = nfs_block_size(cfg->rsize, NULL); + if (cfg->wsize) + server->wsize = nfs_block_size(cfg->wsize, NULL); - server->acregmin = data->acregmin * HZ; - server->acregmax = data->acregmax * HZ; - server->acdirmin = data->acdirmin * HZ; - server->acdirmax = data->acdirmax * HZ; + server->acregmin = cfg->acregmin * HZ; + server->acregmax = cfg->acregmax * HZ; + server->acdirmin = cfg->acdirmin * HZ; + server->acdirmax = cfg->acdirmax * HZ; /* Start lockd here, before we might error out */ error = nfs_start_lockd(server); if (error < 0) goto error; - server->port = data->nfs_server.port; - server->auth_info = data->auth_info; + server->port = cfg->nfs_server.port; + server->auth_info = cfg->auth_info; error = nfs_init_server_rpcclient(server, &timeparms, - data->selected_flavor); + cfg->selected_flavor); if (error < 0) goto error; /* Preserve the values of mount_server-related mount options */ - if (data->mount_server.addrlen) { - memcpy(&server->mountd_address, &data->mount_server.address, - data->mount_server.addrlen); - server->mountd_addrlen = data->mount_server.addrlen; + if (cfg->mount_server.addrlen) { + memcpy(&server->mountd_address, &cfg->mount_server.address, + cfg->mount_server.addrlen); + server->mountd_addrlen = cfg->mount_server.addrlen; } - server->mountd_version = data->mount_server.version; - server->mountd_port = data->mount_server.port; - server->mountd_protocol = data->mount_server.protocol; + server->mountd_version = cfg->mount_server.version; + server->mountd_port = cfg->mount_server.port; + server->mountd_protocol = cfg->mount_server.protocol; - server->namelen = data->namlen; + server->namelen = cfg->namlen; return 0; error: @@ -970,7 +970,7 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) goto error; /* Get a client representation */ - error = nfs_init_server(server, mount_info->parsed, nfs_mod); + error = nfs_init_server(server, mount_info->ctx, nfs_mod); if (error < 0) goto error; @@ -981,7 +981,7 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) if (server->nfs_client->rpc_ops->version == 3) { if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) server->namelen = NFS3_MAXNAMLEN; - if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) + if (!(mount_info->ctx->flags & NFS_MOUNT_NORDIRPLUS)) server->caps |= NFS_CAP_READDIRPLUS; } else { if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 8fbfd526d6b8..52aa2b8522f0 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -242,40 +242,40 @@ static const match_table_t nfs_vers_tokens = { { Opt_vers_err, NULL } }; -struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) +struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) { - struct nfs_parsed_mount_data *data; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (data) { - data->timeo = NFS_UNSPEC_TIMEO; - data->retrans = NFS_UNSPEC_RETRANS; - data->acregmin = NFS_DEF_ACREGMIN; - data->acregmax = NFS_DEF_ACREGMAX; - data->acdirmin = NFS_DEF_ACDIRMIN; - data->acdirmax = NFS_DEF_ACDIRMAX; - data->mount_server.port = NFS_UNSPEC_PORT; - data->nfs_server.port = NFS_UNSPEC_PORT; - data->nfs_server.protocol = XPRT_TRANSPORT_TCP; - data->selected_flavor = RPC_AUTH_MAXFLAVOR; - data->minorversion = 0; - data->need_mount = true; - data->net = current->nsproxy->net_ns; - data->lsm_opts = NULL; + struct nfs_fs_context *ctx; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (ctx) { + ctx->timeo = NFS_UNSPEC_TIMEO; + ctx->retrans = NFS_UNSPEC_RETRANS; + ctx->acregmin = NFS_DEF_ACREGMIN; + ctx->acregmax = NFS_DEF_ACREGMAX; + ctx->acdirmin = NFS_DEF_ACDIRMIN; + ctx->acdirmax = NFS_DEF_ACDIRMAX; + ctx->mount_server.port = NFS_UNSPEC_PORT; + ctx->nfs_server.port = NFS_UNSPEC_PORT; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; + ctx->minorversion = 0; + ctx->need_mount = true; + ctx->net = current->nsproxy->net_ns; + ctx->lsm_opts = NULL; } - return data; + return ctx; } -void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) +void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx) { - if (data) { - kfree(data->client_address); - kfree(data->mount_server.hostname); - kfree(data->nfs_server.export_path); - kfree(data->nfs_server.hostname); - kfree(data->fscache_uniq); - security_free_mnt_opts(&data->lsm_opts); - kfree(data); + if (ctx) { + kfree(ctx->client_address); + kfree(ctx->mount_server.hostname); + kfree(ctx->nfs_server.export_path); + kfree(ctx->nfs_server.hostname); + kfree(ctx->fscache_uniq); + security_free_mnt_opts(&ctx->lsm_opts); + kfree(ctx); } } @@ -306,15 +306,15 @@ static int nfs_verify_server_address(struct sockaddr *addr) * Sanity check the NFS transport protocol. * */ -static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) +static void nfs_validate_transport_protocol(struct nfs_fs_context *ctx) { - switch (mnt->nfs_server.protocol) { + switch (ctx->nfs_server.protocol) { case XPRT_TRANSPORT_UDP: case XPRT_TRANSPORT_TCP: case XPRT_TRANSPORT_RDMA: break; default: - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; } } @@ -322,20 +322,20 @@ static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) * For text based NFSv2/v3 mounts, the mount protocol transport default * settings should depend upon the specified NFS transport. */ -static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) +static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) { - nfs_validate_transport_protocol(mnt); + nfs_validate_transport_protocol(ctx); - if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || - mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) + if (ctx->mount_server.protocol == XPRT_TRANSPORT_UDP || + ctx->mount_server.protocol == XPRT_TRANSPORT_TCP) return; - switch (mnt->nfs_server.protocol) { + switch (ctx->nfs_server.protocol) { case XPRT_TRANSPORT_UDP: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case XPRT_TRANSPORT_TCP: case XPRT_TRANSPORT_RDMA: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; } } @@ -367,8 +367,7 @@ static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(char *value, - struct nfs_parsed_mount_data *mnt) +static int nfs_parse_security_flavors(char *value, struct nfs_fs_context *ctx) { substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; @@ -417,7 +416,7 @@ static int nfs_parse_security_flavors(char *value, return 0; } - if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) + if (!nfs_auth_info_add(&ctx->auth_info, pseudoflavor)) return 0; } @@ -425,36 +424,36 @@ static int nfs_parse_security_flavors(char *value, } static int nfs_parse_version_string(char *string, - struct nfs_parsed_mount_data *mnt, + struct nfs_fs_context *ctx, substring_t *args) { - mnt->flags &= ~NFS_MOUNT_VER3; + ctx->flags &= ~NFS_MOUNT_VER3; switch (match_token(string, nfs_vers_tokens, args)) { case Opt_vers_2: - mnt->version = 2; + ctx->version = 2; break; case Opt_vers_3: - mnt->flags |= NFS_MOUNT_VER3; - mnt->version = 3; + ctx->flags |= NFS_MOUNT_VER3; + ctx->version = 3; break; case Opt_vers_4: /* Backward compatibility option. In future, * the mount program should always supply * a NFSv4 minor version number. */ - mnt->version = 4; + ctx->version = 4; break; case Opt_vers_4_0: - mnt->version = 4; - mnt->minorversion = 0; + ctx->version = 4; + ctx->minorversion = 0; break; case Opt_vers_4_1: - mnt->version = 4; - mnt->minorversion = 1; + ctx->version = 4; + ctx->minorversion = 1; break; case Opt_vers_4_2: - mnt->version = 4; - mnt->minorversion = 2; + ctx->version = 4; + ctx->minorversion = 2; break; default: return 0; @@ -502,7 +501,7 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, * skipped as they are encountered. If there were no errors, return 1; * otherwise return 0 (zero). */ -int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) +int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) { char *p, *string; int rc, sloppy = 0, invalid_option = 0; @@ -515,7 +514,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) } dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); + rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); if (rc) goto out_security_failure; @@ -536,96 +535,96 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) * boolean options: foo/nofoo */ case Opt_soft: - mnt->flags |= NFS_MOUNT_SOFT; - mnt->flags &= ~NFS_MOUNT_SOFTERR; + ctx->flags |= NFS_MOUNT_SOFT; + ctx->flags &= ~NFS_MOUNT_SOFTERR; break; case Opt_softerr: - mnt->flags |= NFS_MOUNT_SOFTERR; - mnt->flags &= ~NFS_MOUNT_SOFT; + ctx->flags |= NFS_MOUNT_SOFTERR; + ctx->flags &= ~NFS_MOUNT_SOFT; break; case Opt_hard: - mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); break; case Opt_posix: - mnt->flags |= NFS_MOUNT_POSIX; + ctx->flags |= NFS_MOUNT_POSIX; break; case Opt_noposix: - mnt->flags &= ~NFS_MOUNT_POSIX; + ctx->flags &= ~NFS_MOUNT_POSIX; break; case Opt_cto: - mnt->flags &= ~NFS_MOUNT_NOCTO; + ctx->flags &= ~NFS_MOUNT_NOCTO; break; case Opt_nocto: - mnt->flags |= NFS_MOUNT_NOCTO; + ctx->flags |= NFS_MOUNT_NOCTO; break; case Opt_ac: - mnt->flags &= ~NFS_MOUNT_NOAC; + ctx->flags &= ~NFS_MOUNT_NOAC; break; case Opt_noac: - mnt->flags |= NFS_MOUNT_NOAC; + ctx->flags |= NFS_MOUNT_NOAC; break; case Opt_lock: - mnt->flags &= ~NFS_MOUNT_NONLM; - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_nolock: - mnt->flags |= NFS_MOUNT_NONLM; - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_rdma: - mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; xprt_load_transport(p); break; case Opt_acl: - mnt->flags &= ~NFS_MOUNT_NOACL; + ctx->flags &= ~NFS_MOUNT_NOACL; break; case Opt_noacl: - mnt->flags |= NFS_MOUNT_NOACL; + ctx->flags |= NFS_MOUNT_NOACL; break; case Opt_rdirplus: - mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; break; case Opt_nordirplus: - mnt->flags |= NFS_MOUNT_NORDIRPLUS; + ctx->flags |= NFS_MOUNT_NORDIRPLUS; break; case Opt_sharecache: - mnt->flags &= ~NFS_MOUNT_UNSHARED; + ctx->flags &= ~NFS_MOUNT_UNSHARED; break; case Opt_nosharecache: - mnt->flags |= NFS_MOUNT_UNSHARED; + ctx->flags |= NFS_MOUNT_UNSHARED; break; case Opt_resvport: - mnt->flags &= ~NFS_MOUNT_NORESVPORT; + ctx->flags &= ~NFS_MOUNT_NORESVPORT; break; case Opt_noresvport: - mnt->flags |= NFS_MOUNT_NORESVPORT; + ctx->flags |= NFS_MOUNT_NORESVPORT; break; case Opt_fscache: - mnt->options |= NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; + ctx->options |= NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; break; case Opt_nofscache: - mnt->options &= ~NFS_OPTION_FSCACHE; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = NULL; + ctx->options &= ~NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; break; case Opt_migration: - mnt->options |= NFS_OPTION_MIGRATION; + ctx->options |= NFS_OPTION_MIGRATION; break; case Opt_nomigration: - mnt->options &= ~NFS_OPTION_MIGRATION; + ctx->options &= ~NFS_OPTION_MIGRATION; break; /* @@ -635,83 +634,83 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) if (nfs_get_option_ul(args, &option) || option > USHRT_MAX) goto out_invalid_value; - mnt->nfs_server.port = option; + ctx->nfs_server.port = option; break; case Opt_rsize: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->rsize = option; + ctx->rsize = option; break; case Opt_wsize: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->wsize = option; + ctx->wsize = option; break; case Opt_bsize: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->bsize = option; + ctx->bsize = option; break; case Opt_timeo: if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) goto out_invalid_value; - mnt->timeo = option; + ctx->timeo = option; break; case Opt_retrans: if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) goto out_invalid_value; - mnt->retrans = option; + ctx->retrans = option; break; case Opt_acregmin: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acregmin = option; + ctx->acregmin = option; break; case Opt_acregmax: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acregmax = option; + ctx->acregmax = option; break; case Opt_acdirmin: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acdirmin = option; + ctx->acdirmin = option; break; case Opt_acdirmax: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acdirmax = option; + ctx->acdirmax = option; break; case Opt_actimeo: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->acregmin = mnt->acregmax = - mnt->acdirmin = mnt->acdirmax = option; + ctx->acregmin = ctx->acregmax = + ctx->acdirmin = ctx->acdirmax = option; break; case Opt_namelen: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; - mnt->namlen = option; + ctx->namlen = option; break; case Opt_mountport: if (nfs_get_option_ul(args, &option) || option > USHRT_MAX) goto out_invalid_value; - mnt->mount_server.port = option; + ctx->mount_server.port = option; break; case Opt_mountvers: if (nfs_get_option_ul(args, &option) || option < NFS_MNT_VERSION || option > NFS_MNT3_VERSION) goto out_invalid_value; - mnt->mount_server.version = option; + ctx->mount_server.version = option; break; case Opt_minorversion: if (nfs_get_option_ul(args, &option)) goto out_invalid_value; if (option > NFS4_MAX_MINOR_VERSION) goto out_invalid_value; - mnt->minorversion = option; + ctx->minorversion = option; break; /* @@ -721,7 +720,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_version_string(string, mnt, args); + rc = nfs_parse_version_string(string, ctx, args); kfree(string); if (!rc) goto out_invalid_value; @@ -730,7 +729,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_security_flavors(string, mnt); + rc = nfs_parse_security_flavors(string, ctx); kfree(string); if (!rc) { dfprintk(MOUNT, "NFS: unrecognized " @@ -751,23 +750,23 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: - mnt->flags &= ~NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ - mnt->flags |= NFS_MOUNT_TCP; - mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; xprt_load_transport(string); break; default: @@ -792,13 +791,13 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: - mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; + ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: - mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; + ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma: /* not used for side protocols */ default: @@ -811,41 +810,41 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) string = match_strdup(args); if (string == NULL) goto out_nomem; - mnt->nfs_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), + ctx->nfs_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), (struct sockaddr *) - &mnt->nfs_server.address, - sizeof(mnt->nfs_server.address)); + &ctx->nfs_server.address, + sizeof(ctx->nfs_server.address)); kfree(string); - if (mnt->nfs_server.addrlen == 0) + if (ctx->nfs_server.addrlen == 0) goto out_invalid_address; break; case Opt_clientaddr: - if (nfs_get_option_str(args, &mnt->client_address)) + if (nfs_get_option_str(args, &ctx->client_address)) goto out_nomem; break; case Opt_mounthost: if (nfs_get_option_str(args, - &mnt->mount_server.hostname)) + &ctx->mount_server.hostname)) goto out_nomem; break; case Opt_mountaddr: string = match_strdup(args); if (string == NULL) goto out_nomem; - mnt->mount_server.addrlen = - rpc_pton(mnt->net, string, strlen(string), + ctx->mount_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), (struct sockaddr *) - &mnt->mount_server.address, - sizeof(mnt->mount_server.address)); + &ctx->mount_server.address, + sizeof(ctx->mount_server.address)); kfree(string); - if (mnt->mount_server.addrlen == 0) + if (ctx->mount_server.addrlen == 0) goto out_invalid_address; break; case Opt_nconnect: if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) goto out_invalid_value; - mnt->nfs_server.nconnect = option; + ctx->nfs_server.nconnect = option; break; case Opt_lookupcache: string = match_strdup(args); @@ -856,14 +855,14 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) kfree(string); switch (token) { case Opt_lookupcache_all: - mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); + ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; case Opt_lookupcache_positive: - mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; + ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; break; case Opt_lookupcache_none: - mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: dfprintk(MOUNT, "NFS: invalid " @@ -872,9 +871,9 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) } break; case Opt_fscache_uniq: - if (nfs_get_option_str(args, &mnt->fscache_uniq)) + if (nfs_get_option_str(args, &ctx->fscache_uniq)) goto out_nomem; - mnt->options |= NFS_OPTION_FSCACHE; + ctx->options |= NFS_OPTION_FSCACHE; break; case Opt_local_lock: string = match_strdup(args); @@ -885,17 +884,17 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) kfree(string); switch (token) { case Opt_local_lock_all: - mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_local_lock_flock: - mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; + ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; break; case Opt_local_lock_posix: - mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; + ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; break; case Opt_local_lock_none: - mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; default: @@ -928,11 +927,11 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) if (!sloppy && invalid_option) return 0; - if (mnt->minorversion && mnt->version != 4) + if (ctx->minorversion && ctx->version != 4) goto out_minorversion_mismatch; - if (mnt->options & NFS_OPTION_MIGRATION && - (mnt->version != 4 || mnt->minorversion != 0)) + if (ctx->options & NFS_OPTION_MIGRATION && + (ctx->version != 4 || ctx->minorversion != 0)) goto out_migration_misuse; /* @@ -940,15 +939,15 @@ int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt) * families in the addr=/mountaddr= options. */ if (protofamily != AF_UNSPEC && - protofamily != mnt->nfs_server.address.ss_family) + protofamily != ctx->nfs_server.address.ss_family) goto out_proto_mismatch; if (mountfamily != AF_UNSPEC) { - if (mnt->mount_server.addrlen) { - if (mountfamily != mnt->mount_server.address.ss_family) + if (ctx->mount_server.addrlen) { + if (mountfamily != ctx->mount_server.address.ss_family) goto out_mountproto_mismatch; } else { - if (mountfamily != mnt->nfs_server.address.ss_family) + if (mountfamily != ctx->nfs_server.address.ss_family) goto out_mountproto_mismatch; } } @@ -970,7 +969,7 @@ out_invalid_value: return 0; out_minorversion_mismatch: printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", mnt->version, mnt->minorversion); + "minorversion=%u\n", ctx->version, ctx->minorversion); return 0; out_migration_misuse: printk(KERN_INFO @@ -1078,18 +1077,18 @@ out_path: * mountproto=tcp after mountproto=udp, and so on */ static int nfs23_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name) { struct nfs_mount_data *data = (struct nfs_mount_data *)options; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; if (data == NULL) goto out_no_data; - args->version = NFS_DEFAULT_VERSION; + ctx->version = NFS_DEFAULT_VERSION; switch (data->version) { case 1: data->namlen = 0; /* fall through */ @@ -1115,10 +1114,10 @@ static int nfs23_validate_mount_data(void *options, if (data->root.size > NFS3_FHSIZE || data->root.size == 0) goto out_invalid_fh; mntfh->size = data->root.size; - args->version = 3; + ctx->version = 3; } else { mntfh->size = NFS2_FHSIZE; - args->version = 2; + ctx->version = 2; } @@ -1128,47 +1127,47 @@ static int nfs23_validate_mount_data(void *options, sizeof(mntfh->data) - mntfh->size); /* - * Translate to nfs_parsed_mount_data, which nfs_fill_super + * Translate to nfs_fs_context, which nfs_fill_super * can deal with. */ - args->flags = data->flags & NFS_MOUNT_FLAGMASK; - args->flags |= extra_flags; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->need_mount = false; + ctx->flags = data->flags & NFS_MOUNT_FLAGMASK; + ctx->flags |= extra_flags; + ctx->rsize = data->rsize; + ctx->wsize = data->wsize; + ctx->timeo = data->timeo; + ctx->retrans = data->retrans; + ctx->acregmin = data->acregmin; + ctx->acregmax = data->acregmax; + ctx->acdirmin = data->acdirmin; + ctx->acdirmax = data->acdirmax; + ctx->need_mount = false; memcpy(sap, &data->addr, sizeof(data->addr)); - args->nfs_server.addrlen = sizeof(data->addr); - args->nfs_server.port = ntohs(data->addr.sin_port); + ctx->nfs_server.addrlen = sizeof(data->addr); + ctx->nfs_server.port = ntohs(data->addr.sin_port); if (sap->sa_family != AF_INET || !nfs_verify_server_address(sap)) goto out_no_address; if (!(data->flags & NFS_MOUNT_TCP)) - args->nfs_server.protocol = XPRT_TRANSPORT_UDP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; /* N.B. caller will free nfs_server.hostname in all cases */ - args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); - args->namlen = data->namlen; - args->bsize = data->bsize; + ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); + ctx->namlen = data->namlen; + ctx->bsize = data->bsize; if (data->flags & NFS_MOUNT_SECFLAVOUR) - args->selected_flavor = data->pseudoflavor; + ctx->selected_flavor = data->pseudoflavor; else - args->selected_flavor = RPC_AUTH_UNIX; - if (!args->nfs_server.hostname) + ctx->selected_flavor = RPC_AUTH_UNIX; + if (!ctx->nfs_server.hostname) goto out_nomem; if (!(data->flags & NFS_MOUNT_NONLM)) - args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); else - args->flags |= (NFS_MOUNT_LOCAL_FLOCK| + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); /* * The legacy version 6 binary mount data from userspace has a @@ -1183,7 +1182,7 @@ static int nfs23_validate_mount_data(void *options, int rc; data->context[NFS_MAX_CONTEXT_LEN] = '\0'; rc = security_add_mnt_opt("context", data->context, - strlen(data->context), &args->lsm_opts); + strlen(data->context), ctx->lsm_opts); if (rc) return rc; #else @@ -1225,10 +1224,9 @@ out_invalid_fh: } #if IS_ENABLED(CONFIG_NFS_V4) - -static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) +static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx) { - args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| + ctx->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); } @@ -1236,30 +1234,30 @@ static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) * Validate NFSv4 mount options */ static int nfs4_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, const char *dev_name) { - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; char *c; if (data == NULL) goto out_no_data; - args->version = 4; + ctx->version = 4; switch (data->version) { case 1: - if (data->host_addrlen > sizeof(args->nfs_server.address)) + if (data->host_addrlen > sizeof(ctx->nfs_server.address)) goto out_no_address; if (data->host_addrlen == 0) goto out_no_address; - args->nfs_server.addrlen = data->host_addrlen; + ctx->nfs_server.addrlen = data->host_addrlen; if (copy_from_user(sap, data->host_addr, data->host_addrlen)) return -EFAULT; if (!nfs_verify_server_address(sap)) goto out_no_address; - args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); + ctx->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); if (data->auth_flavourlen) { rpc_authflavor_t pseudoflavor; @@ -1269,43 +1267,43 @@ static int nfs4_validate_mount_data(void *options, data->auth_flavours, sizeof(pseudoflavor))) return -EFAULT; - args->selected_flavor = pseudoflavor; + ctx->selected_flavor = pseudoflavor; } else - args->selected_flavor = RPC_AUTH_UNIX; + ctx->selected_flavor = RPC_AUTH_UNIX; c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); if (IS_ERR(c)) return PTR_ERR(c); - args->nfs_server.hostname = c; + ctx->nfs_server.hostname = c; c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); if (IS_ERR(c)) return PTR_ERR(c); - args->nfs_server.export_path = c; + ctx->nfs_server.export_path = c; dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); c = strndup_user(data->client_addr.data, 16); if (IS_ERR(c)) return PTR_ERR(c); - args->client_address = c; + ctx->client_address = c; /* - * Translate to nfs_parsed_mount_data, which nfs4_fill_super + * Translate to nfs_fs_context, which nfs4_fill_super * can deal with. */ - args->flags = data->flags & NFS4_MOUNT_FLAGMASK; - args->rsize = data->rsize; - args->wsize = data->wsize; - args->timeo = data->timeo; - args->retrans = data->retrans; - args->acregmin = data->acregmin; - args->acregmax = data->acregmax; - args->acdirmin = data->acdirmin; - args->acdirmax = data->acdirmax; - args->nfs_server.protocol = data->proto; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + ctx->flags = data->flags & NFS4_MOUNT_FLAGMASK; + ctx->rsize = data->rsize; + ctx->wsize = data->wsize; + ctx->timeo = data->timeo; + ctx->retrans = data->retrans; + ctx->acregmin = data->acregmin; + ctx->acregmax = data->acregmax; + ctx->acdirmin = data->acdirmin; + ctx->acdirmax = data->acdirmax; + ctx->nfs_server.protocol = data->proto; + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) goto out_invalid_transport_udp; break; @@ -1335,67 +1333,67 @@ out_invalid_transport_udp: int nfs_validate_mount_data(struct file_system_type *fs_type, void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name) { if (fs_type == &nfs_fs_type) - return nfs23_validate_mount_data(options, args, mntfh, dev_name); - return nfs4_validate_mount_data(options, args, dev_name); + return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); + return nfs4_validate_mount_data(options, ctx, dev_name); } #else int nfs_validate_mount_data(struct file_system_type *fs_type, void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name) { - return nfs23_validate_mount_data(options, args, mntfh, dev_name); + return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); } #endif int nfs_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, const char *dev_name) { int port = 0; int max_namelen = PAGE_SIZE; int max_pathlen = NFS_MAXPATHLEN; - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; - if (nfs_parse_mount_options((char *)options, args) == 0) + if (nfs_parse_mount_options((char *)options, ctx) == 0) return -EINVAL; if (!nfs_verify_server_address(sap)) goto out_no_address; - if (args->version == 4) { + if (ctx->version == 4) { #if IS_ENABLED(CONFIG_NFS_V4) - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) port = NFS_RDMA_PORT; else port = NFS_PORT; max_namelen = NFS4_MAXNAMLEN; max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) goto out_invalid_transport_udp; - nfs4_validate_mount_flags(args); + nfs4_validate_mount_flags(ctx); #else goto out_v4_not_compiled; #endif /* CONFIG_NFS_V4 */ } else { - nfs_set_mount_transport_protocol(args); - if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + nfs_set_mount_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) port = NFS_RDMA_PORT; } - nfs_set_port(sap, &args->nfs_server.port, port); + nfs_set_port(sap, &ctx->nfs_server.port, port); return nfs_parse_devname(dev_name, - &args->nfs_server.hostname, + &ctx->nfs_server.hostname, max_namelen, - &args->nfs_server.export_path, + &ctx->nfs_server.export_path, max_pathlen); #if !IS_ENABLED(CONFIG_NFS_V4) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 28ab31fc5aa6..7131fa150d1b 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -81,7 +81,7 @@ struct nfs_client_initdata { /* * In-kernel mount arguments */ -struct nfs_parsed_mount_data { +struct nfs_fs_context { int flags; unsigned int rsize, wsize; unsigned int timeo, retrans; @@ -138,7 +138,7 @@ struct nfs_mount_request { struct nfs_mount_info { unsigned int inherited_bsize; - struct nfs_parsed_mount_data *parsed; + struct nfs_fs_context *ctx; struct nfs_clone_mount *cloned; struct nfs_server *server; struct nfs_fh *mntfh; @@ -229,16 +229,16 @@ struct nfs_pageio_descriptor; /* mount.c */ #define NFS_TEXT_DATA 1 -extern struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void); -extern void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data); -extern int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt); +extern struct nfs_fs_context *nfs_alloc_parsed_mount_data(void); +extern void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx); +extern int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx); extern int nfs_validate_mount_data(struct file_system_type *fs_type, void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, struct nfs_fh *mntfh, const char *dev_name); extern int nfs_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, + struct nfs_fs_context *ctx, const char *dev_name); /* pagelist.c */ diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 538fd036b69d..2216d166768b 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1056,61 +1056,61 @@ out: * Create a version 4 volume record */ static int nfs4_init_server(struct nfs_server *server, - struct nfs_parsed_mount_data *data) + struct nfs_fs_context *ctx) { struct rpc_timeout timeparms; int error; - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); + nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, + ctx->timeo, ctx->retrans); /* Initialise the client representation from the mount data */ - server->flags = data->flags; - server->options = data->options; - server->auth_info = data->auth_info; + server->flags = ctx->flags; + server->options = ctx->options; + server->auth_info = ctx->auth_info; /* Use the first specified auth flavor. If this flavor isn't * allowed by the server, use the SECINFO path to try the * other specified flavors */ - if (data->auth_info.flavor_len >= 1) - data->selected_flavor = data->auth_info.flavors[0]; + if (ctx->auth_info.flavor_len >= 1) + ctx->selected_flavor = ctx->auth_info.flavors[0]; else - data->selected_flavor = RPC_AUTH_UNIX; + ctx->selected_flavor = RPC_AUTH_UNIX; /* Get a client record */ error = nfs4_set_client(server, - data->nfs_server.hostname, - (const struct sockaddr *)&data->nfs_server.address, - data->nfs_server.addrlen, - data->client_address, - data->nfs_server.protocol, + ctx->nfs_server.hostname, + (const struct sockaddr *)&ctx->nfs_server.address, + ctx->nfs_server.addrlen, + ctx->client_address, + ctx->nfs_server.protocol, &timeparms, - data->minorversion, - data->nfs_server.nconnect, - data->net); + ctx->minorversion, + ctx->nfs_server.nconnect, + ctx->net); if (error < 0) return error; - if (data->rsize) - server->rsize = nfs_block_size(data->rsize, NULL); - if (data->wsize) - server->wsize = nfs_block_size(data->wsize, NULL); + if (ctx->rsize) + server->rsize = nfs_block_size(ctx->rsize, NULL); + if (ctx->wsize) + server->wsize = nfs_block_size(ctx->wsize, NULL); - server->acregmin = data->acregmin * HZ; - server->acregmax = data->acregmax * HZ; - server->acdirmin = data->acdirmin * HZ; - server->acdirmax = data->acdirmax * HZ; - server->port = data->nfs_server.port; + server->acregmin = ctx->acregmin * HZ; + server->acregmax = ctx->acregmax * HZ; + server->acdirmin = ctx->acdirmin * HZ; + server->acdirmax = ctx->acdirmax * HZ; + server->port = ctx->nfs_server.port; return nfs_init_server_rpcclient(server, &timeparms, - data->selected_flavor); + ctx->selected_flavor); } /* * Create a version 4 volume record * - keyed on server and FSID */ -/*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, +/*struct nfs_server *nfs4_create_server(const struct nfs_fs_context *data, struct nfs_fh *mntfh)*/ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) { @@ -1124,10 +1124,10 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) server->cred = get_cred(current_cred()); - auth_probe = mount_info->parsed->auth_info.flavor_len < 1; + auth_probe = mount_info->ctx->auth_info.flavor_len < 1; /* set up the general RPC client */ - error = nfs4_init_server(server, mount_info->parsed); + error = nfs4_init_server(server, mount_info->ctx); if (error < 0) goto error; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index f1c2d294073a..f931e8f49b05 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -198,15 +198,15 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { - struct nfs_parsed_mount_data *data = mount_info->parsed; + struct nfs_fs_context *ctx = mount_info->ctx; struct dentry *res; dfprintk(MOUNT, "--> nfs4_try_mount()\n"); res = do_nfs4_mount(nfs4_create_server(mount_info), flags, mount_info, - data->nfs_server.hostname, - data->nfs_server.export_path); + ctx->nfs_server.hostname, + ctx->nfs_server.export_path); dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), diff --git a/fs/nfs/super.c b/fs/nfs/super.c index b07585f62c65..83527515590e 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -726,12 +726,13 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, EXPORT_SYMBOL_GPL(nfs_auth_info_match); /* - * Ensure that a specified authtype in args->auth_info is supported by - * the server. Returns 0 and sets args->selected_flavor if it's ok, and + * Ensure that a specified authtype in cfg->auth_info is supported by + * the server. Returns 0 and sets cfg->selected_flavor if it's ok, and * -EACCES if not. */ -static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, - rpc_authflavor_t *server_authlist, unsigned int count) +static int nfs_verify_authflavors(struct nfs_fs_context *cfg, + rpc_authflavor_t *server_authlist, + unsigned int count) { rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; bool found_auth_null = false; @@ -752,7 +753,7 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, for (i = 0; i < count; i++) { flavor = server_authlist[i]; - if (nfs_auth_info_match(&args->auth_info, flavor)) + if (nfs_auth_info_match(&cfg->auth_info, flavor)) goto out; if (flavor == RPC_AUTH_NULL) @@ -760,7 +761,7 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, } if (found_auth_null) { - flavor = args->auth_info.flavors[0]; + flavor = cfg->auth_info.flavors[0]; goto out; } @@ -769,8 +770,8 @@ static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, return -EACCES; out: - args->selected_flavor = flavor; - dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); + cfg->selected_flavor = flavor; + dfprintk(MOUNT, "NFS: using auth flavor %u\n", cfg->selected_flavor); return 0; } @@ -778,50 +779,50 @@ out: * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_request_mount(struct nfs_parsed_mount_data *args, +static int nfs_request_mount(struct nfs_fs_context *cfg, struct nfs_fh *root_fh, rpc_authflavor_t *server_authlist, unsigned int *server_authlist_len) { struct nfs_mount_request request = { .sap = (struct sockaddr *) - &args->mount_server.address, - .dirpath = args->nfs_server.export_path, - .protocol = args->mount_server.protocol, + &cfg->mount_server.address, + .dirpath = cfg->nfs_server.export_path, + .protocol = cfg->mount_server.protocol, .fh = root_fh, - .noresvport = args->flags & NFS_MOUNT_NORESVPORT, + .noresvport = cfg->flags & NFS_MOUNT_NORESVPORT, .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, - .net = args->net, + .net = cfg->net, }; int status; - if (args->mount_server.version == 0) { - switch (args->version) { + if (cfg->mount_server.version == 0) { + switch (cfg->version) { default: - args->mount_server.version = NFS_MNT3_VERSION; + cfg->mount_server.version = NFS_MNT3_VERSION; break; case 2: - args->mount_server.version = NFS_MNT_VERSION; + cfg->mount_server.version = NFS_MNT_VERSION; } } - request.version = args->mount_server.version; + request.version = cfg->mount_server.version; - if (args->mount_server.hostname) - request.hostname = args->mount_server.hostname; + if (cfg->mount_server.hostname) + request.hostname = cfg->mount_server.hostname; else - request.hostname = args->nfs_server.hostname; + request.hostname = cfg->nfs_server.hostname; /* * Construct the mount server's address. */ - if (args->mount_server.address.ss_family == AF_UNSPEC) { - memcpy(request.sap, &args->nfs_server.address, - args->nfs_server.addrlen); - args->mount_server.addrlen = args->nfs_server.addrlen; + if (cfg->mount_server.address.ss_family == AF_UNSPEC) { + memcpy(request.sap, &cfg->nfs_server.address, + cfg->nfs_server.addrlen); + cfg->mount_server.addrlen = cfg->nfs_server.addrlen; } - request.salen = args->mount_server.addrlen; - nfs_set_port(request.sap, &args->mount_server.port, 0); + request.salen = cfg->mount_server.addrlen; + nfs_set_port(request.sap, &cfg->mount_server.port, 0); /* * Now ask the mount server to map our export path @@ -844,12 +845,12 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf bool tried_auth_unix = false; bool auth_null_in_list = false; struct nfs_server *server = ERR_PTR(-EACCES); - struct nfs_parsed_mount_data *args = mount_info->parsed; + struct nfs_fs_context *ctx = mount_info->ctx; rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; unsigned int authlist_len = ARRAY_SIZE(authlist); struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - status = nfs_request_mount(args, mount_info->mntfh, authlist, + status = nfs_request_mount(ctx, mount_info->mntfh, authlist, &authlist_len); if (status) return ERR_PTR(status); @@ -858,10 +859,10 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf * Was a sec= authflavor specified in the options? First, verify * whether the server supports it, and then just try to use it if so. */ - if (args->auth_info.flavor_len > 0) { - status = nfs_verify_authflavors(args, authlist, authlist_len); + if (ctx->auth_info.flavor_len > 0) { + status = nfs_verify_authflavors(ctx, authlist, authlist_len); dfprintk(MOUNT, "NFS: using auth flavor %u\n", - args->selected_flavor); + ctx->selected_flavor); if (status) return ERR_PTR(status); return nfs_mod->rpc_ops->create_server(mount_info); @@ -890,7 +891,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Fallthrough */ } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); - args->selected_flavor = flavor; + ctx->selected_flavor = flavor; server = nfs_mod->rpc_ops->create_server(mount_info); if (!IS_ERR(server)) return server; @@ -906,7 +907,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); - args->selected_flavor = RPC_AUTH_UNIX; + ctx->selected_flavor = RPC_AUTH_UNIX; return nfs_mod->rpc_ops->create_server(mount_info); } @@ -916,7 +917,7 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name, struct nfs_mount_info *mount_info) { struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - if (mount_info->parsed->need_mount) + if (mount_info->ctx->need_mount) mount_info->server = nfs_try_mount_request(mount_info); else mount_info->server = nfs_mod->rpc_ops->create_server(mount_info); @@ -940,24 +941,24 @@ EXPORT_SYMBOL_GPL(nfs_try_mount); static int nfs_compare_remount_data(struct nfs_server *nfss, - struct nfs_parsed_mount_data *data) + struct nfs_fs_context *ctx) { - if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || - data->rsize != nfss->rsize || - data->wsize != nfss->wsize || - data->version != nfss->nfs_client->rpc_ops->version || - data->minorversion != nfss->nfs_client->cl_minorversion || - data->retrans != nfss->client->cl_timeout->to_retries || - !nfs_auth_info_match(&data->auth_info, nfss->client->cl_auth->au_flavor) || - data->acregmin != nfss->acregmin / HZ || - data->acregmax != nfss->acregmax / HZ || - data->acdirmin != nfss->acdirmin / HZ || - data->acdirmax != nfss->acdirmax / HZ || - data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || - (data->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || - data->nfs_server.port != nfss->port || - data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || - !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, + if ((ctx->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || + ctx->rsize != nfss->rsize || + ctx->wsize != nfss->wsize || + ctx->version != nfss->nfs_client->rpc_ops->version || + ctx->minorversion != nfss->nfs_client->cl_minorversion || + ctx->retrans != nfss->client->cl_timeout->to_retries || + !nfs_auth_info_match(&ctx->auth_info, nfss->client->cl_auth->au_flavor) || + ctx->acregmin != nfss->acregmin / HZ || + ctx->acregmax != nfss->acregmax / HZ || + ctx->acdirmin != nfss->acdirmin / HZ || + ctx->acdirmax != nfss->acdirmax / HZ || + ctx->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || + (ctx->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || + ctx->nfs_server.port != nfss->port || + ctx->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || + !rpc_cmp_addr((struct sockaddr *)&ctx->nfs_server.address, (struct sockaddr *)&nfss->nfs_client->cl_addr)) return -EINVAL; @@ -969,7 +970,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) { int error; struct nfs_server *nfss = sb->s_fs_info; - struct nfs_parsed_mount_data *data; + struct nfs_fs_context *ctx; struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; u32 nfsvers = nfss->nfs_client->rpc_ops->version; @@ -987,32 +988,32 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) options->version <= 6)))) return 0; - data = nfs_alloc_parsed_mount_data(); - if (data == NULL) + ctx = nfs_alloc_parsed_mount_data(); + if (ctx == NULL) return -ENOMEM; /* fill out struct with values from existing mount */ - data->flags = nfss->flags; - data->rsize = nfss->rsize; - data->wsize = nfss->wsize; - data->retrans = nfss->client->cl_timeout->to_retries; - data->selected_flavor = nfss->client->cl_auth->au_flavor; - data->acregmin = nfss->acregmin / HZ; - data->acregmax = nfss->acregmax / HZ; - data->acdirmin = nfss->acdirmin / HZ; - data->acdirmax = nfss->acdirmax / HZ; - data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; - data->nfs_server.port = nfss->port; - data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; - data->version = nfsvers; - data->minorversion = nfss->nfs_client->cl_minorversion; - data->net = current->nsproxy->net_ns; - memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, - data->nfs_server.addrlen); + ctx->flags = nfss->flags; + ctx->rsize = nfss->rsize; + ctx->wsize = nfss->wsize; + ctx->retrans = nfss->client->cl_timeout->to_retries; + ctx->selected_flavor = nfss->client->cl_auth->au_flavor; + ctx->acregmin = nfss->acregmin / HZ; + ctx->acregmax = nfss->acregmax / HZ; + ctx->acdirmin = nfss->acdirmin / HZ; + ctx->acdirmax = nfss->acdirmax / HZ; + ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; + ctx->nfs_server.port = nfss->port; + ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; + ctx->version = nfsvers; + ctx->minorversion = nfss->nfs_client->cl_minorversion; + ctx->net = current->nsproxy->net_ns; + memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, + ctx->nfs_server.addrlen); /* overwrite those values with any that were specified */ error = -EINVAL; - if (!nfs_parse_mount_options((char *)options, data)) + if (!nfs_parse_mount_options((char *)options, ctx)) goto out; /* @@ -1021,15 +1022,15 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the * remount options, so we have to explicitly reset it. */ - if (data->flags & NFS_MOUNT_NOAC) + if (ctx->flags & NFS_MOUNT_NOAC) *flags |= SB_SYNCHRONOUS; /* compare new mount options with old ones */ - error = nfs_compare_remount_data(nfss, data); + error = nfs_compare_remount_data(nfss, ctx); if (!error) - error = security_sb_remount(sb, data->lsm_opts); + error = security_sb_remount(sb, ctx->lsm_opts); out: - nfs_free_parsed_mount_data(data); + nfs_free_parsed_mount_data(ctx); return error; } EXPORT_SYMBOL_GPL(nfs_remount); @@ -1039,15 +1040,15 @@ EXPORT_SYMBOL_GPL(nfs_remount); */ static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) { - struct nfs_parsed_mount_data *data = mount_info->parsed; + struct nfs_fs_context *ctx = mount_info->ctx; struct nfs_server *server = NFS_SB(sb); sb->s_blocksize_bits = 0; sb->s_blocksize = 0; sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; sb->s_op = server->nfs_client->cl_nfs_mod->sops; - if (data && data->bsize) - sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); + if (ctx && ctx->bsize) + sb->s_blocksize = nfs_block_size(ctx->bsize, &sb->s_blocksize_bits); if (server->nfs_client->rpc_ops->version != 2) { /* The VFS shouldn't apply the umask to mode bits. We will do @@ -1208,7 +1209,7 @@ static int nfs_compare_super(struct super_block *sb, void *data) #ifdef CONFIG_NFS_FSCACHE static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_parsed_mount_data *parsed, + struct nfs_fs_context *ctx, struct nfs_clone_mount *cloned) { struct nfs_server *nfss = NFS_SB(sb); @@ -1218,12 +1219,12 @@ static void nfs_get_cache_cookie(struct super_block *sb, nfss->fscache_key = NULL; nfss->fscache = NULL; - if (parsed) { - if (!(parsed->options & NFS_OPTION_FSCACHE)) + if (ctx) { + if (!(ctx->options & NFS_OPTION_FSCACHE)) return; - if (parsed->fscache_uniq) { - uniq = parsed->fscache_uniq; - ulen = strlen(parsed->fscache_uniq); + if (ctx->fscache_uniq) { + uniq = ctx->fscache_uniq; + ulen = strlen(ctx->fscache_uniq); } } else if (cloned) { struct nfs_server *mnt_s = NFS_SB(cloned->sb); @@ -1240,7 +1241,7 @@ static void nfs_get_cache_cookie(struct super_block *sb, } #else static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_parsed_mount_data *parsed, + struct nfs_fs_context *parsed, struct nfs_clone_mount *cloned) { } @@ -1312,7 +1313,7 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, s->s_blocksize_bits = bsize; s->s_blocksize = 1U << bsize; } - nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); + nfs_get_cache_cookie(s, mount_info->ctx, mount_info->cloned); if (!(server->flags & NFS_MOUNT_UNSHARED)) s->s_iflags |= SB_I_MULTIROOT; } @@ -1333,7 +1334,7 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, &kflags_out); } else { - error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, + error = security_sb_set_mnt_opts(s, mount_info->ctx->lsm_opts, kflags, &kflags_out); } if (error) @@ -1370,21 +1371,22 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, struct nfs_subversion *nfs_mod; int error; - mount_info.parsed = nfs_alloc_parsed_mount_data(); + mount_info.ctx = nfs_alloc_parsed_mount_data(); mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.parsed == NULL || mount_info.mntfh == NULL) + if (mount_info.ctx == NULL || mount_info.mntfh == NULL) goto out; /* Validate the mount data */ - error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); + error = nfs_validate_mount_data(fs_type, raw_data, mount_info.ctx, mount_info.mntfh, dev_name); if (error == NFS_TEXT_DATA) - error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); + error = nfs_validate_text_mount_data(raw_data, + mount_info.ctx, dev_name); if (error < 0) { mntroot = ERR_PTR(error); goto out; } - nfs_mod = get_nfs_version(mount_info.parsed->version); + nfs_mod = get_nfs_version(mount_info.ctx->version); if (IS_ERR(nfs_mod)) { mntroot = ERR_CAST(nfs_mod); goto out; @@ -1395,7 +1397,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type, put_nfs_version(nfs_mod); out: - nfs_free_parsed_mount_data(mount_info.parsed); + nfs_free_parsed_mount_data(mount_info.ctx); nfs_free_fhandle(mount_info.mntfh); return mntroot; } -- cgit v1.2.3-59-g8ed1b From f8ee01e3e2c8845e812497f0d4925c18cafaad87 Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:07 -0500 Subject: NFS: Split nfs_parse_mount_options() Split nfs_parse_mount_options() to move the prologue, list-splitting and epilogue into one function and the per-option processing into another. Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 126 +++++++++++++++++++++++++++++----------------------- fs/nfs/internal.h | 3 ++ 2 files changed, 73 insertions(+), 56 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 52aa2b8522f0..a386825c3b0f 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -496,36 +496,18 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, } /* - * Error-check and convert a string of mount options from user space into - * a data structure. The whole mount string is processed; bad options are - * skipped as they are encountered. If there were no errors, return 1; - * otherwise return 0 (zero). + * Parse a single mount option in "key[=val]" form. */ -int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) +static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { - char *p, *string; - int rc, sloppy = 0, invalid_option = 0; - unsigned short protofamily = AF_UNSPEC; - unsigned short mountfamily = AF_UNSPEC; - - if (!raw) { - dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); - return 1; - } - dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - - rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); - if (rc) - goto out_security_failure; + char *string; + int rc; - while ((p = strsep(&raw, ",")) != NULL) { + { substring_t args[MAX_OPT_ARGS]; unsigned long option; int token; - if (!*p) - continue; - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); token = match_token(p, nfs_mount_option_tokens, args); @@ -734,7 +716,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) if (!rc) { dfprintk(MOUNT, "NFS: unrecognized " "security flavor\n"); - return 0; + return -EINVAL; } break; case Opt_proto: @@ -744,24 +726,24 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) token = match_token(string, nfs_xprt_protocol_tokens, args); - protofamily = AF_INET; + ctx->protofamily = AF_INET; switch (token) { case Opt_xprt_udp6: - protofamily = AF_INET6; + ctx->protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->flags &= ~NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - protofamily = AF_INET6; + ctx->protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: - protofamily = AF_INET6; + ctx->protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ @@ -773,7 +755,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) dfprintk(MOUNT, "NFS: unrecognized " "transport protocol\n"); kfree(string); - return 0; + return -EINVAL; } kfree(string); break; @@ -785,16 +767,16 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) nfs_xprt_protocol_tokens, args); kfree(string); - mountfamily = AF_INET; + ctx->mountfamily = AF_INET; switch (token) { case Opt_xprt_udp6: - mountfamily = AF_INET6; + ctx->mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - mountfamily = AF_INET6; + ctx->mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; @@ -803,7 +785,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: unrecognized " "transport protocol\n"); - return 0; + return -EINVAL; } break; case Opt_addr: @@ -867,7 +849,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: invalid " "lookupcache argument\n"); - return 0; + return -EINVAL; } break; case Opt_fscache_uniq: @@ -900,7 +882,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: invalid " "local_lock argument\n"); - return 0; + return -EINVAL; } break; @@ -908,7 +890,7 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * Special options */ case Opt_sloppy: - sloppy = 1; + ctx->sloppy = 1; dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); break; case Opt_userspace: @@ -918,12 +900,53 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) break; default: - invalid_option = 1; dfprintk(MOUNT, "NFS: unrecognized mount option " "'%s'\n", p); + return -EINVAL; } } + return 0; + +out_invalid_address: + printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); + return -EINVAL; +out_invalid_value: + printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + return -EINVAL; +out_nomem: + printk(KERN_INFO "NFS: not enough memory to parse option\n"); + return -ENOMEM; +} + +/* + * Error-check and convert a string of mount options from user space into + * a data structure. The whole mount string is processed; bad options are + * skipped as they are encountered. If there were no errors, return 1; + * otherwise return 0 (zero). + */ +int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) +{ + char *p; + int rc, sloppy = 0, invalid_option = 0; + + if (!raw) { + dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); + return 1; + } + dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); + + rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); + if (rc) + goto out_security_failure; + + while ((p = strsep(&raw, ",")) != NULL) { + if (!*p) + continue; + if (nfs_fs_context_parse_option(ctx, p) < 0) + invalid_option = true; + } + if (!sloppy && invalid_option) return 0; @@ -938,22 +961,26 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * verify that any proto=/mountproto= options match the address * families in the addr=/mountaddr= options. */ - if (protofamily != AF_UNSPEC && - protofamily != ctx->nfs_server.address.ss_family) + if (ctx->protofamily != AF_UNSPEC && + ctx->protofamily != ctx->nfs_server.address.ss_family) goto out_proto_mismatch; - if (mountfamily != AF_UNSPEC) { + if (ctx->mountfamily != AF_UNSPEC) { if (ctx->mount_server.addrlen) { - if (mountfamily != ctx->mount_server.address.ss_family) + if (ctx->mountfamily != ctx->mount_server.address.ss_family) goto out_mountproto_mismatch; } else { - if (mountfamily != ctx->nfs_server.address.ss_family) + if (ctx->mountfamily != ctx->nfs_server.address.ss_family) goto out_mountproto_mismatch; } } return 1; +out_minorversion_mismatch: + printk(KERN_INFO "NFS: mount option vers=%u does not support " + "minorversion=%u\n", ctx->version, ctx->minorversion); + return 0; out_mountproto_mismatch: printk(KERN_INFO "NFS: mount server address does not match mountproto= " "option\n"); @@ -961,23 +988,10 @@ out_mountproto_mismatch: out_proto_mismatch: printk(KERN_INFO "NFS: server address does not match proto= option\n"); return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return 0; -out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); - return 0; -out_minorversion_mismatch: - printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", ctx->version, ctx->minorversion); - return 0; out_migration_misuse: printk(KERN_INFO "NFS: 'migration' not supported for this NFS version\n"); - return 0; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return 0; + return -EINVAL; out_security_failure: printk(KERN_INFO "NFS: security options invalid: %d\n", rc); return 0; diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 7131fa150d1b..d0abc7b65cd2 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -96,7 +96,10 @@ struct nfs_fs_context { unsigned int version; unsigned int minorversion; char *fscache_uniq; + unsigned short protofamily; + unsigned short mountfamily; bool need_mount; + bool sloppy; struct { struct sockaddr_storage address; -- cgit v1.2.3-59-g8ed1b From cbd071b5daa070976ada8601188fcefc986747d6 Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:08 -0500 Subject: NFS: Deindent nfs_fs_context_parse_option() Deindent nfs_fs_context_parse_option(). Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 739 ++++++++++++++++++++++++++-------------------------- 1 file changed, 367 insertions(+), 372 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index a386825c3b0f..92a1e4bd9133 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -500,410 +500,405 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, */ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { + substring_t args[MAX_OPT_ARGS]; + unsigned long option; char *string; - int rc; - - { - substring_t args[MAX_OPT_ARGS]; - unsigned long option; - int token; + int token, rc; - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); - - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + token = match_token(p, nfs_mount_option_tokens, args); + switch (token) { /* * boolean options: foo/nofoo */ - case Opt_soft: - ctx->flags |= NFS_MOUNT_SOFT; - ctx->flags &= ~NFS_MOUNT_SOFTERR; - break; - case Opt_softerr: - ctx->flags |= NFS_MOUNT_SOFTERR; - ctx->flags &= ~NFS_MOUNT_SOFT; - break; - case Opt_hard: - ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); - break; - case Opt_posix: - ctx->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - ctx->flags &= ~NFS_MOUNT_POSIX; - break; - case Opt_cto: - ctx->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - ctx->flags |= NFS_MOUNT_NOCTO; - break; - case Opt_ac: - ctx->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - ctx->flags |= NFS_MOUNT_NOAC; - break; - case Opt_lock: - ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_udp: - ctx->flags &= ~NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_tcp: - ctx->flags |= NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_rdma: - ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ - ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); - break; - case Opt_acl: - ctx->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - ctx->flags |= NFS_MOUNT_NOACL; - break; - case Opt_rdirplus: - ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - ctx->flags |= NFS_MOUNT_NORDIRPLUS; - break; - case Opt_sharecache: - ctx->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - ctx->flags |= NFS_MOUNT_UNSHARED; - break; - case Opt_resvport: - ctx->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - ctx->flags |= NFS_MOUNT_NORESVPORT; - break; - case Opt_fscache: - ctx->options |= NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_nofscache: - ctx->options &= ~NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_migration: - ctx->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - ctx->options &= ~NFS_OPTION_MIGRATION; - break; + case Opt_soft: + ctx->flags |= NFS_MOUNT_SOFT; + ctx->flags &= ~NFS_MOUNT_SOFTERR; + break; + case Opt_softerr: + ctx->flags |= NFS_MOUNT_SOFTERR; + ctx->flags &= ~NFS_MOUNT_SOFT; + break; + case Opt_hard: + ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + break; + case Opt_posix: + ctx->flags |= NFS_MOUNT_POSIX; + break; + case Opt_noposix: + ctx->flags &= ~NFS_MOUNT_POSIX; + break; + case Opt_cto: + ctx->flags &= ~NFS_MOUNT_NOCTO; + break; + case Opt_nocto: + ctx->flags |= NFS_MOUNT_NOCTO; + break; + case Opt_ac: + ctx->flags &= ~NFS_MOUNT_NOAC; + break; + case Opt_noac: + ctx->flags |= NFS_MOUNT_NOAC; + break; + case Opt_lock: + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_nolock: + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + break; + case Opt_udp: + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_tcp: + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_rdma: + ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(p); + break; + case Opt_acl: + ctx->flags &= ~NFS_MOUNT_NOACL; + break; + case Opt_noacl: + ctx->flags |= NFS_MOUNT_NOACL; + break; + case Opt_rdirplus: + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; + break; + case Opt_nordirplus: + ctx->flags |= NFS_MOUNT_NORDIRPLUS; + break; + case Opt_sharecache: + ctx->flags &= ~NFS_MOUNT_UNSHARED; + break; + case Opt_nosharecache: + ctx->flags |= NFS_MOUNT_UNSHARED; + break; + case Opt_resvport: + ctx->flags &= ~NFS_MOUNT_NORESVPORT; + break; + case Opt_noresvport: + ctx->flags |= NFS_MOUNT_NORESVPORT; + break; + case Opt_fscache: + ctx->options |= NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; + break; + case Opt_nofscache: + ctx->options &= ~NFS_OPTION_FSCACHE; + kfree(ctx->fscache_uniq); + ctx->fscache_uniq = NULL; + break; + case Opt_migration: + ctx->options |= NFS_OPTION_MIGRATION; + break; + case Opt_nomigration: + ctx->options &= ~NFS_OPTION_MIGRATION; + break; /* * options that take numeric values */ - case Opt_port: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - ctx->nfs_server.port = option; - break; - case Opt_rsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->rsize = option; - break; - case Opt_wsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->wsize = option; - break; - case Opt_bsize: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->bsize = option; - break; - case Opt_timeo: - if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) - goto out_invalid_value; - ctx->timeo = option; - break; - case Opt_retrans: - if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) - goto out_invalid_value; - ctx->retrans = option; - break; - case Opt_acregmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acregmin = option; - break; - case Opt_acregmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acregmax = option; - break; - case Opt_acdirmin: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acdirmin = option; - break; - case Opt_acdirmax: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acdirmax = option; - break; - case Opt_actimeo: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->acregmin = ctx->acregmax = + case Opt_port: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + ctx->nfs_server.port = option; + break; + case Opt_rsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->rsize = option; + break; + case Opt_wsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->wsize = option; + break; + case Opt_bsize: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->bsize = option; + break; + case Opt_timeo: + if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) + goto out_invalid_value; + ctx->timeo = option; + break; + case Opt_retrans: + if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) + goto out_invalid_value; + ctx->retrans = option; + break; + case Opt_acregmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acregmin = option; + break; + case Opt_acregmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acregmax = option; + break; + case Opt_acdirmin: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acdirmin = option; + break; + case Opt_acdirmax: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acdirmax = option; + break; + case Opt_actimeo: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->acregmin = ctx->acregmax = ctx->acdirmin = ctx->acdirmax = option; - break; - case Opt_namelen: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - ctx->namlen = option; - break; - case Opt_mountport: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) - goto out_invalid_value; - ctx->mount_server.port = option; - break; - case Opt_mountvers: - if (nfs_get_option_ul(args, &option) || - option < NFS_MNT_VERSION || - option > NFS_MNT3_VERSION) - goto out_invalid_value; - ctx->mount_server.version = option; - break; - case Opt_minorversion: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - if (option > NFS4_MAX_MINOR_VERSION) - goto out_invalid_value; - ctx->minorversion = option; - break; + break; + case Opt_namelen: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + ctx->namlen = option; + break; + case Opt_mountport: + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) + goto out_invalid_value; + ctx->mount_server.port = option; + break; + case Opt_mountvers: + if (nfs_get_option_ul(args, &option) || + option < NFS_MNT_VERSION || + option > NFS_MNT3_VERSION) + goto out_invalid_value; + ctx->mount_server.version = option; + break; + case Opt_minorversion: + if (nfs_get_option_ul(args, &option)) + goto out_invalid_value; + if (option > NFS4_MAX_MINOR_VERSION) + goto out_invalid_value; + ctx->minorversion = option; + break; /* * options that take text values */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_version_string(string, ctx, args); - kfree(string); - if (!rc) - goto out_invalid_value; + case Opt_nfsvers: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_version_string(string, ctx, args); + kfree(string); + if (!rc) + goto out_invalid_value; + break; + case Opt_sec: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_security_flavors(string, ctx); + kfree(string); + if (!rc) { + dfprintk(MOUNT, "NFS: unrecognized " + "security flavor\n"); + return -EINVAL; + } + break; + case Opt_proto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + + ctx->protofamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + ctx->protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + ctx->flags &= ~NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; - case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = nfs_parse_security_flavors(string, ctx); - kfree(string); - if (!rc) { - dfprintk(MOUNT, "NFS: unrecognized " - "security flavor\n"); - return -EINVAL; - } + case Opt_xprt_tcp6: + ctx->protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); - - ctx->protofamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - ctx->protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - ctx->flags &= ~NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - ctx->protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - ctx->flags |= NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma6: - ctx->protofamily = AF_INET6; - /* fall through */ - case Opt_xprt_rdma: - /* vector side protocols to TCP */ - ctx->flags |= NFS_MOUNT_TCP; - ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); - break; - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - kfree(string); - return -EINVAL; - } - kfree(string); + case Opt_xprt_rdma6: + ctx->protofamily = AF_INET6; + /* fall through */ + case Opt_xprt_rdma: + /* vector side protocols to TCP */ + ctx->flags |= NFS_MOUNT_TCP; + ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; + xprt_load_transport(string); break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); kfree(string); + return -EINVAL; + } + kfree(string); + break; + case Opt_mountproto: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_xprt_protocol_tokens, args); + kfree(string); - ctx->mountfamily = AF_INET; - switch (token) { - case Opt_xprt_udp6: - ctx->mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_udp: - ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; - break; - case Opt_xprt_tcp6: - ctx->mountfamily = AF_INET6; - /* fall through */ - case Opt_xprt_tcp: - ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; - break; - case Opt_xprt_rdma: /* not used for side protocols */ - default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); - return -EINVAL; - } - break; - case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->nfs_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) - &ctx->nfs_server.address, - sizeof(ctx->nfs_server.address)); - kfree(string); - if (ctx->nfs_server.addrlen == 0) - goto out_invalid_address; - break; - case Opt_clientaddr: - if (nfs_get_option_str(args, &ctx->client_address)) - goto out_nomem; + ctx->mountfamily = AF_INET; + switch (token) { + case Opt_xprt_udp6: + ctx->mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_udp: + ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; + break; + case Opt_xprt_tcp6: + ctx->mountfamily = AF_INET6; + /* fall through */ + case Opt_xprt_tcp: + ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; + break; + case Opt_xprt_rdma: /* not used for side protocols */ + default: + dfprintk(MOUNT, "NFS: unrecognized " + "transport protocol\n"); + return -EINVAL; + } + break; + case Opt_addr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + ctx->nfs_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), + (struct sockaddr *) + &ctx->nfs_server.address, + sizeof(ctx->nfs_server.address)); + kfree(string); + if (ctx->nfs_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_clientaddr: + if (nfs_get_option_str(args, &ctx->client_address)) + goto out_nomem; + break; + case Opt_mounthost: + if (nfs_get_option_str(args, + &ctx->mount_server.hostname)) + goto out_nomem; + break; + case Opt_mountaddr: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + ctx->mount_server.addrlen = + rpc_pton(ctx->net, string, strlen(string), + (struct sockaddr *) + &ctx->mount_server.address, + sizeof(ctx->mount_server.address)); + kfree(string); + if (ctx->mount_server.addrlen == 0) + goto out_invalid_address; + break; + case Opt_nconnect: + if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) + goto out_invalid_value; + ctx->nfs_server.nconnect = option; + break; + case Opt_lookupcache: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_lookupcache_tokens, args); + kfree(string); + switch (token) { + case Opt_lookupcache_all: + ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; - case Opt_mounthost: - if (nfs_get_option_str(args, - &ctx->mount_server.hostname)) - goto out_nomem; + case Opt_lookupcache_positive: + ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; break; - case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->mount_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) - &ctx->mount_server.address, - sizeof(ctx->mount_server.address)); - kfree(string); - if (ctx->mount_server.addrlen == 0) - goto out_invalid_address; + case Opt_lookupcache_none: + ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; - case Opt_nconnect: - if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; - ctx->nfs_server.nconnect = option; + default: + dfprintk(MOUNT, "NFS: invalid " + "lookupcache argument\n"); + return -EINVAL; + } + break; + case Opt_fscache_uniq: + if (nfs_get_option_str(args, &ctx->fscache_uniq)) + goto out_nomem; + ctx->options |= NFS_OPTION_FSCACHE; + break; + case Opt_local_lock: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, nfs_local_lock_tokens, + args); + kfree(string); + switch (token) { + case Opt_local_lock_all: + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); break; - case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, - nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { - case Opt_lookupcache_all: - ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); - break; - case Opt_lookupcache_positive: - ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; - ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; - break; - case Opt_lookupcache_none: - ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "lookupcache argument\n"); - return -EINVAL; - } + case Opt_local_lock_flock: + ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &ctx->fscache_uniq)) - goto out_nomem; - ctx->options |= NFS_OPTION_FSCACHE; + case Opt_local_lock_posix: + ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; break; - case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, - args); - kfree(string); - switch (token) { - case Opt_local_lock_all: - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_local_lock_flock: - ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; - break; - case Opt_local_lock_posix: - ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; - break; - case Opt_local_lock_none: - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); - break; - default: - dfprintk(MOUNT, "NFS: invalid " - "local_lock argument\n"); - return -EINVAL; - } + case Opt_local_lock_none: + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); break; + default: + dfprintk(MOUNT, "NFS: invalid " + "local_lock argument\n"); + return -EINVAL; + } + break; /* * Special options */ - case Opt_sloppy: - ctx->sloppy = 1; - dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); - break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option " - "'%s'\n", p); - break; + case Opt_sloppy: + ctx->sloppy = 1; + dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); + break; + case Opt_userspace: + case Opt_deprecated: + dfprintk(MOUNT, "NFS: ignoring mount option " + "'%s'\n", p); + break; - default: - dfprintk(MOUNT, "NFS: unrecognized mount option " - "'%s'\n", p); - return -EINVAL; - } + default: + dfprintk(MOUNT, "NFS: unrecognized mount option " + "'%s'\n", p); + return -EINVAL; } return 0; -- cgit v1.2.3-59-g8ed1b From 48be8a66cf98accca033c42d214698dd64ac4f79 Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:09 -0500 Subject: NFS: Add a small buffer in nfs_fs_context to avoid string dup Add a small buffer in nfs_fs_context to avoid string duplication when parsing numbers. Also make the parsing function wrapper place the parsed integer directly in the appropriate nfs_fs_context struct member. Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 98 +++++++++++++++++++++++++---------------------------- fs/nfs/internal.h | 2 ++ 2 files changed, 48 insertions(+), 52 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 92a1e4bd9133..2921c5820c31 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -468,27 +468,38 @@ static int nfs_get_option_str(substring_t args[], char **option) return !*option; } -static int nfs_get_option_ul(substring_t args[], unsigned long *option) +static int nfs_get_option_ui(struct nfs_fs_context *ctx, + substring_t args[], unsigned int *option) { - int rc; - char *string; + match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); + return kstrtouint(ctx->buf, 10, option); +} - string = match_strdup(args); - if (string == NULL) - return -ENOMEM; - rc = kstrtoul(string, 10, option); - kfree(string); +static int nfs_get_option_ui_bound(struct nfs_fs_context *ctx, + substring_t args[], unsigned int *option, + unsigned int l_bound, unsigned u_bound) +{ + int ret; - return rc; + match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); + ret = kstrtouint(ctx->buf, 10, option); + if (ret < 0) + return ret; + if (*option < l_bound || *option > u_bound) + return -ERANGE; + return 0; } -static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, - unsigned long l_bound, unsigned long u_bound) +static int nfs_get_option_us_bound(struct nfs_fs_context *ctx, + substring_t args[], unsigned short *option, + unsigned short l_bound, + unsigned short u_bound) { int ret; - ret = nfs_get_option_ul(args, option); - if (ret != 0) + match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); + ret = kstrtou16(ctx->buf, 10, option); + if (ret < 0) return ret; if (*option < l_bound || *option > u_bound) return -ERANGE; @@ -501,7 +512,6 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { substring_t args[MAX_OPT_ARGS]; - unsigned long option; char *string; int token, rc; @@ -609,86 +619,70 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) * options that take numeric values */ case Opt_port: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) + if (nfs_get_option_ui_bound(ctx, args, &ctx->nfs_server.port, + 0, USHRT_MAX)) goto out_invalid_value; - ctx->nfs_server.port = option; break; case Opt_rsize: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->rsize)) goto out_invalid_value; - ctx->rsize = option; break; case Opt_wsize: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->wsize)) goto out_invalid_value; - ctx->wsize = option; break; case Opt_bsize: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->bsize)) goto out_invalid_value; - ctx->bsize = option; break; case Opt_timeo: - if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) + if (nfs_get_option_ui_bound(ctx, args, &ctx->timeo, 1, INT_MAX)) goto out_invalid_value; - ctx->timeo = option; break; case Opt_retrans: - if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) + if (nfs_get_option_ui_bound(ctx, args, &ctx->retrans, 0, INT_MAX)) goto out_invalid_value; - ctx->retrans = option; break; case Opt_acregmin: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acregmin)) goto out_invalid_value; - ctx->acregmin = option; break; case Opt_acregmax: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acregmax)) goto out_invalid_value; - ctx->acregmax = option; break; case Opt_acdirmin: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acdirmin)) goto out_invalid_value; - ctx->acdirmin = option; break; case Opt_acdirmax: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) goto out_invalid_value; - ctx->acdirmax = option; break; case Opt_actimeo: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) goto out_invalid_value; ctx->acregmin = ctx->acregmax = - ctx->acdirmin = ctx->acdirmax = option; + ctx->acdirmin = ctx->acdirmax; break; case Opt_namelen: - if (nfs_get_option_ul(args, &option)) + if (nfs_get_option_ui(ctx, args, &ctx->namlen)) goto out_invalid_value; - ctx->namlen = option; break; case Opt_mountport: - if (nfs_get_option_ul(args, &option) || - option > USHRT_MAX) + if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.port, + 0, USHRT_MAX)) goto out_invalid_value; - ctx->mount_server.port = option; break; case Opt_mountvers: - if (nfs_get_option_ul(args, &option) || - option < NFS_MNT_VERSION || - option > NFS_MNT3_VERSION) + if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.version, + NFS_MNT_VERSION, NFS_MNT3_VERSION)) goto out_invalid_value; - ctx->mount_server.version = option; break; case Opt_minorversion: - if (nfs_get_option_ul(args, &option)) - goto out_invalid_value; - if (option > NFS4_MAX_MINOR_VERSION) + if (nfs_get_option_ui_bound(ctx, args, &ctx->minorversion, + 0, NFS4_MAX_MINOR_VERSION)) goto out_invalid_value; - ctx->minorversion = option; break; /* @@ -820,9 +814,9 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_invalid_address; break; case Opt_nconnect: - if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) + if (nfs_get_option_us_bound(ctx, args, &ctx->nfs_server.nconnect, + 1, NFS_MAX_CONNECTIONS)) goto out_invalid_value; - ctx->nfs_server.nconnect = option; break; case Opt_lookupcache: string = match_strdup(args); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index d0abc7b65cd2..5342f3e4d565 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -122,6 +122,8 @@ struct nfs_fs_context { void *lsm_opts; struct net *net; + + char buf[32]; /* Parse buffer */ }; /* mount_clnt.c */ -- cgit v1.2.3-59-g8ed1b From e558100fda7e8c7888f523920214bcb35ed9382b Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:10 -0500 Subject: NFS: Do some tidying of the parsing code Do some tidying of the parsing code, including: (*) Returning 0/error rather than true/false. (*) Putting the nfs_fs_context pointer first in some arg lists. (*) Unwrap some lines that will now fit on one line. (*) Provide unioned sockaddr/sockaddr_storage fields to avoid casts. (*) nfs_parse_devname() can paste its return values directly into the nfs_fs_context struct as that's where the caller puts them. Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 126 ++++++++++++++++++++++------------------------------ fs/nfs/internal.h | 16 ++++--- fs/nfs/super.c | 2 +- 3 files changed, 66 insertions(+), 78 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 2921c5820c31..44531443a92b 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -343,8 +343,9 @@ static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) * Add 'flavor' to 'auth_info' if not already present. * Returns true if 'flavor' ends up in the list, false otherwise */ -static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, - rpc_authflavor_t flavor) +static int nfs_auth_info_add(struct nfs_fs_context *ctx, + struct nfs_auth_info *auth_info, + rpc_authflavor_t flavor) { unsigned int i; unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); @@ -352,26 +353,27 @@ static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, /* make sure this flavor isn't already in the list */ for (i = 0; i < auth_info->flavor_len; i++) { if (flavor == auth_info->flavors[i]) - return true; + return 0; } if (auth_info->flavor_len + 1 >= max_flavor_len) { dfprintk(MOUNT, "NFS: too many sec= flavors\n"); - return false; + return -EINVAL; } auth_info->flavors[auth_info->flavor_len++] = flavor; - return true; + return 0; } /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(char *value, struct nfs_fs_context *ctx) +static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) { substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; char *p; + int ret; dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); @@ -413,19 +415,20 @@ static int nfs_parse_security_flavors(char *value, struct nfs_fs_context *ctx) default: dfprintk(MOUNT, "NFS: sec= option '%s' not recognized\n", p); - return 0; + return -EINVAL; } - if (!nfs_auth_info_add(&ctx->auth_info, pseudoflavor)) - return 0; + ret = nfs_auth_info_add(ctx, &ctx->auth_info, pseudoflavor); + if (ret < 0) + return ret; } - return 1; + return 0; } -static int nfs_parse_version_string(char *string, - struct nfs_fs_context *ctx, - substring_t *args) +static int nfs_parse_version_string(struct nfs_fs_context *ctx, + char *string, + substring_t *args) { ctx->flags &= ~NFS_MOUNT_VER3; switch (match_token(string, nfs_vers_tokens, args)) { @@ -456,9 +459,10 @@ static int nfs_parse_version_string(char *string, ctx->minorversion = 2; break; default: - return 0; + dfprintk(MOUNT, "NFS: Unsupported NFS version\n"); + return -EINVAL; } - return 1; + return 0; } static int nfs_get_option_str(substring_t args[], char **option) @@ -513,7 +517,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) { substring_t args[MAX_OPT_ARGS]; char *string; - int token, rc; + int token, ret; dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); @@ -553,13 +557,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) break; case Opt_lock: ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_nolock: ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | - NFS_MOUNT_LOCAL_FCNTL); + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; case Opt_udp: ctx->flags &= ~NFS_MOUNT_TCP; @@ -692,29 +694,25 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_version_string(string, ctx, args); + ret = nfs_parse_version_string(ctx, string, args); kfree(string); - if (!rc) - goto out_invalid_value; + if (ret < 0) + return ret; break; case Opt_sec: string = match_strdup(args); if (string == NULL) goto out_nomem; - rc = nfs_parse_security_flavors(string, ctx); + ret = nfs_parse_security_flavors(ctx, string); kfree(string); - if (!rc) { - dfprintk(MOUNT, "NFS: unrecognized " - "security flavor\n"); - return -EINVAL; - } + if (ret < 0) + return ret; break; case Opt_proto: string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); + token = match_token(string, nfs_xprt_protocol_tokens, args); ctx->protofamily = AF_INET; switch (token) { @@ -742,9 +740,8 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) xprt_load_transport(string); break; default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); kfree(string); + dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } kfree(string); @@ -753,8 +750,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, - nfs_xprt_protocol_tokens, args); + token = match_token(string, nfs_xprt_protocol_tokens, args); kfree(string); ctx->mountfamily = AF_INET; @@ -773,8 +769,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) break; case Opt_xprt_rdma: /* not used for side protocols */ default: - dfprintk(MOUNT, "NFS: unrecognized " - "transport protocol\n"); + dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } break; @@ -784,9 +779,8 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_nomem; ctx->nfs_server.addrlen = rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) &ctx->nfs_server.address, - sizeof(ctx->nfs_server.address)); + sizeof(ctx->nfs_server._address)); kfree(string); if (ctx->nfs_server.addrlen == 0) goto out_invalid_address; @@ -796,8 +790,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_nomem; break; case Opt_mounthost: - if (nfs_get_option_str(args, - &ctx->mount_server.hostname)) + if (nfs_get_option_str(args, &ctx->mount_server.hostname)) goto out_nomem; break; case Opt_mountaddr: @@ -806,9 +799,8 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) goto out_nomem; ctx->mount_server.addrlen = rpc_pton(ctx->net, string, strlen(string), - (struct sockaddr *) &ctx->mount_server.address, - sizeof(ctx->mount_server.address)); + sizeof(ctx->mount_server._address)); kfree(string); if (ctx->mount_server.addrlen == 0) goto out_invalid_address; @@ -822,8 +814,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, - nfs_lookupcache_tokens, args); + token = match_token(string, nfs_lookupcache_tokens, args); kfree(string); switch (token) { case Opt_lookupcache_all: @@ -837,8 +828,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: - dfprintk(MOUNT, "NFS: invalid " - "lookupcache argument\n"); + dfprintk(MOUNT, "NFS: invalid lookupcache argument\n"); return -EINVAL; } break; @@ -851,8 +841,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) string = match_strdup(args); if (string == NULL) goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, - args); + token = match_token(string, nfs_local_lock_tokens, args); kfree(string); switch (token) { case Opt_local_lock_all: @@ -870,8 +859,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) NFS_MOUNT_LOCAL_FCNTL); break; default: - dfprintk(MOUNT, "NFS: invalid " - "local_lock argument\n"); + dfprintk(MOUNT, "NFS: invalid local_lock argument\n"); return -EINVAL; } break; @@ -885,13 +873,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) break; case Opt_userspace: case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option " - "'%s'\n", p); + dfprintk(MOUNT, "NFS: ignoring mount option '%s'\n", p); break; default: - dfprintk(MOUNT, "NFS: unrecognized mount option " - "'%s'\n", p); + dfprintk(MOUNT, "NFS: unrecognized mount option '%s'\n", p); return -EINVAL; } @@ -951,15 +937,15 @@ int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) * families in the addr=/mountaddr= options. */ if (ctx->protofamily != AF_UNSPEC && - ctx->protofamily != ctx->nfs_server.address.ss_family) + ctx->protofamily != ctx->nfs_server.address.sa_family) goto out_proto_mismatch; if (ctx->mountfamily != AF_UNSPEC) { if (ctx->mount_server.addrlen) { - if (ctx->mountfamily != ctx->mount_server.address.ss_family) + if (ctx->mountfamily != ctx->mount_server.address.sa_family) goto out_mountproto_mismatch; } else { - if (ctx->mountfamily != ctx->nfs_server.address.ss_family) + if (ctx->mountfamily != ctx->nfs_server.address.sa_family) goto out_mountproto_mismatch; } } @@ -995,9 +981,9 @@ out_security_failure: * * Note: caller frees hostname and export path, even on error. */ -static int nfs_parse_devname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) +static int nfs_parse_devname(struct nfs_fs_context *ctx, + const char *dev_name, + size_t maxnamlen, size_t maxpathlen) { size_t len; char *end; @@ -1033,17 +1019,17 @@ static int nfs_parse_devname(const char *dev_name, goto out_hostname; /* N.B. caller will free nfs_server.hostname in all cases */ - *hostname = kstrndup(dev_name, len, GFP_KERNEL); - if (*hostname == NULL) + ctx->nfs_server.hostname = kmemdup_nul(dev_name, len, GFP_KERNEL); + if (!ctx->nfs_server.hostname) goto out_nomem; len = strlen(++end); if (len > maxpathlen) goto out_path; - *export_path = kstrndup(end, len, GFP_KERNEL); - if (!*export_path) + ctx->nfs_server.export_path = kmemdup_nul(end, len, GFP_KERNEL); + if (!ctx->nfs_server.export_path) goto out_nomem; - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", ctx->nfs_server.export_path); return 0; out_bad_devname: @@ -1064,7 +1050,7 @@ out_path: } /* - * Validate the NFS2/NFS3 mount data + * Parse monolithic NFS2/NFS3 mount data * - fills in the mount root filehandle * * For option strings, user space handles the following behaviors: @@ -1393,11 +1379,7 @@ int nfs_validate_text_mount_data(void *options, nfs_set_port(sap, &ctx->nfs_server.port, port); - return nfs_parse_devname(dev_name, - &ctx->nfs_server.hostname, - max_namelen, - &ctx->nfs_server.export_path, - max_pathlen); + return nfs_parse_devname(ctx, dev_name, max_namelen, max_pathlen); #if !IS_ENABLED(CONFIG_NFS_V4) out_v4_not_compiled: diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 5342f3e4d565..003c2b8eb1e6 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -82,11 +82,11 @@ struct nfs_client_initdata { * In-kernel mount arguments */ struct nfs_fs_context { - int flags; + unsigned int flags; /* NFS{,4}_MOUNT_* flags */ unsigned int rsize, wsize; unsigned int timeo, retrans; - unsigned int acregmin, acregmax, - acdirmin, acdirmax; + unsigned int acregmin, acregmax; + unsigned int acdirmin, acdirmax; unsigned int namlen; unsigned int options; unsigned int bsize; @@ -102,7 +102,10 @@ struct nfs_fs_context { bool sloppy; struct { - struct sockaddr_storage address; + union { + struct sockaddr address; + struct sockaddr_storage _address; + }; size_t addrlen; char *hostname; u32 version; @@ -111,7 +114,10 @@ struct nfs_fs_context { } mount_server; struct { - struct sockaddr_storage address; + union { + struct sockaddr address; + struct sockaddr_storage _address; + }; size_t addrlen; char *hostname; char *export_path; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 83527515590e..59962bc0118f 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -816,7 +816,7 @@ static int nfs_request_mount(struct nfs_fs_context *cfg, /* * Construct the mount server's address. */ - if (cfg->mount_server.address.ss_family == AF_UNSPEC) { + if (cfg->mount_server.address.sa_family == AF_UNSPEC) { memcpy(request.sap, &cfg->nfs_server.address, cfg->nfs_server.addrlen); cfg->mount_server.addrlen = cfg->nfs_server.addrlen; -- cgit v1.2.3-59-g8ed1b From 38465f5d1af932494d66b52d26bb3a02b837cdf8 Mon Sep 17 00:00:00 2001 From: Scott Mayhew Date: Tue, 10 Dec 2019 07:31:11 -0500 Subject: NFS: rename nfs_fs_context pointer arg in a few functions Split out from commit "NFS: Add fs_context support." Rename cfg to ctx in nfs_init_server(), nfs_verify_authflavors(), and nfs_request_mount(). No functional changes. Signed-off-by: Scott Mayhew Signed-off-by: Anna Schumaker --- fs/nfs/client.c | 62 ++++++++++++++++++++++++++++----------------------------- fs/nfs/super.c | 54 ++++++++++++++++++++++++------------------------- 2 files changed, 58 insertions(+), 58 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 0a00df8e71bb..69c0708b2acc 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -658,28 +658,28 @@ EXPORT_SYMBOL_GPL(nfs_init_client); * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_fs_context *cfg, + const struct nfs_fs_context *ctx, struct nfs_subversion *nfs_mod) { struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { - .hostname = cfg->nfs_server.hostname, - .addr = (const struct sockaddr *)&cfg->nfs_server.address, - .addrlen = cfg->nfs_server.addrlen, + .hostname = ctx->nfs_server.hostname, + .addr = (const struct sockaddr *)&ctx->nfs_server.address, + .addrlen = ctx->nfs_server.addrlen, .nfs_mod = nfs_mod, - .proto = cfg->nfs_server.protocol, - .net = cfg->net, + .proto = ctx->nfs_server.protocol, + .net = ctx->net, .timeparms = &timeparms, .cred = server->cred, - .nconnect = cfg->nfs_server.nconnect, + .nconnect = ctx->nfs_server.nconnect, .init_flags = (1UL << NFS_CS_REUSEPORT), }; struct nfs_client *clp; int error; - nfs_init_timeout_values(&timeparms, cfg->nfs_server.protocol, - cfg->timeo, cfg->retrans); - if (cfg->flags & NFS_MOUNT_NORESVPORT) + nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, + ctx->timeo, ctx->retrans); + if (ctx->flags & NFS_MOUNT_NORESVPORT) set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ @@ -690,46 +690,46 @@ static int nfs_init_server(struct nfs_server *server, server->nfs_client = clp; /* Initialise the client representation from the mount data */ - server->flags = cfg->flags; - server->options = cfg->options; + server->flags = ctx->flags; + server->options = ctx->options; server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; - if (cfg->rsize) - server->rsize = nfs_block_size(cfg->rsize, NULL); - if (cfg->wsize) - server->wsize = nfs_block_size(cfg->wsize, NULL); + if (ctx->rsize) + server->rsize = nfs_block_size(ctx->rsize, NULL); + if (ctx->wsize) + server->wsize = nfs_block_size(ctx->wsize, NULL); - server->acregmin = cfg->acregmin * HZ; - server->acregmax = cfg->acregmax * HZ; - server->acdirmin = cfg->acdirmin * HZ; - server->acdirmax = cfg->acdirmax * HZ; + server->acregmin = ctx->acregmin * HZ; + server->acregmax = ctx->acregmax * HZ; + server->acdirmin = ctx->acdirmin * HZ; + server->acdirmax = ctx->acdirmax * HZ; /* Start lockd here, before we might error out */ error = nfs_start_lockd(server); if (error < 0) goto error; - server->port = cfg->nfs_server.port; - server->auth_info = cfg->auth_info; + server->port = ctx->nfs_server.port; + server->auth_info = ctx->auth_info; error = nfs_init_server_rpcclient(server, &timeparms, - cfg->selected_flavor); + ctx->selected_flavor); if (error < 0) goto error; /* Preserve the values of mount_server-related mount options */ - if (cfg->mount_server.addrlen) { - memcpy(&server->mountd_address, &cfg->mount_server.address, - cfg->mount_server.addrlen); - server->mountd_addrlen = cfg->mount_server.addrlen; + if (ctx->mount_server.addrlen) { + memcpy(&server->mountd_address, &ctx->mount_server.address, + ctx->mount_server.addrlen); + server->mountd_addrlen = ctx->mount_server.addrlen; } - server->mountd_version = cfg->mount_server.version; - server->mountd_port = cfg->mount_server.port; - server->mountd_protocol = cfg->mount_server.protocol; + server->mountd_version = ctx->mount_server.version; + server->mountd_port = ctx->mount_server.port; + server->mountd_protocol = ctx->mount_server.protocol; - server->namelen = cfg->namlen; + server->namelen = ctx->namlen; return 0; error: diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 59962bc0118f..6c9573a32a69 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -726,11 +726,11 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, EXPORT_SYMBOL_GPL(nfs_auth_info_match); /* - * Ensure that a specified authtype in cfg->auth_info is supported by - * the server. Returns 0 and sets cfg->selected_flavor if it's ok, and + * Ensure that a specified authtype in ctx->auth_info is supported by + * the server. Returns 0 and sets ctx->selected_flavor if it's ok, and * -EACCES if not. */ -static int nfs_verify_authflavors(struct nfs_fs_context *cfg, +static int nfs_verify_authflavors(struct nfs_fs_context *ctx, rpc_authflavor_t *server_authlist, unsigned int count) { @@ -753,7 +753,7 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, for (i = 0; i < count; i++) { flavor = server_authlist[i]; - if (nfs_auth_info_match(&cfg->auth_info, flavor)) + if (nfs_auth_info_match(&ctx->auth_info, flavor)) goto out; if (flavor == RPC_AUTH_NULL) @@ -761,7 +761,7 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, } if (found_auth_null) { - flavor = cfg->auth_info.flavors[0]; + flavor = ctx->auth_info.flavors[0]; goto out; } @@ -770,8 +770,8 @@ static int nfs_verify_authflavors(struct nfs_fs_context *cfg, return -EACCES; out: - cfg->selected_flavor = flavor; - dfprintk(MOUNT, "NFS: using auth flavor %u\n", cfg->selected_flavor); + ctx->selected_flavor = flavor; + dfprintk(MOUNT, "NFS: using auth flavor %u\n", ctx->selected_flavor); return 0; } @@ -779,50 +779,50 @@ out: * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_request_mount(struct nfs_fs_context *cfg, +static int nfs_request_mount(struct nfs_fs_context *ctx, struct nfs_fh *root_fh, rpc_authflavor_t *server_authlist, unsigned int *server_authlist_len) { struct nfs_mount_request request = { .sap = (struct sockaddr *) - &cfg->mount_server.address, - .dirpath = cfg->nfs_server.export_path, - .protocol = cfg->mount_server.protocol, + &ctx->mount_server.address, + .dirpath = ctx->nfs_server.export_path, + .protocol = ctx->mount_server.protocol, .fh = root_fh, - .noresvport = cfg->flags & NFS_MOUNT_NORESVPORT, + .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, - .net = cfg->net, + .net = ctx->net, }; int status; - if (cfg->mount_server.version == 0) { - switch (cfg->version) { + if (ctx->mount_server.version == 0) { + switch (ctx->version) { default: - cfg->mount_server.version = NFS_MNT3_VERSION; + ctx->mount_server.version = NFS_MNT3_VERSION; break; case 2: - cfg->mount_server.version = NFS_MNT_VERSION; + ctx->mount_server.version = NFS_MNT_VERSION; } } - request.version = cfg->mount_server.version; + request.version = ctx->mount_server.version; - if (cfg->mount_server.hostname) - request.hostname = cfg->mount_server.hostname; + if (ctx->mount_server.hostname) + request.hostname = ctx->mount_server.hostname; else - request.hostname = cfg->nfs_server.hostname; + request.hostname = ctx->nfs_server.hostname; /* * Construct the mount server's address. */ - if (cfg->mount_server.address.sa_family == AF_UNSPEC) { - memcpy(request.sap, &cfg->nfs_server.address, - cfg->nfs_server.addrlen); - cfg->mount_server.addrlen = cfg->nfs_server.addrlen; + if (ctx->mount_server.address.sa_family == AF_UNSPEC) { + memcpy(request.sap, &ctx->nfs_server.address, + ctx->nfs_server.addrlen); + ctx->mount_server.addrlen = ctx->nfs_server.addrlen; } - request.salen = cfg->mount_server.addrlen; - nfs_set_port(request.sap, &cfg->mount_server.port, 0); + request.salen = ctx->mount_server.addrlen; + nfs_set_port(request.sap, &ctx->mount_server.port, 0); /* * Now ask the mount server to map our export path -- cgit v1.2.3-59-g8ed1b From e38bb238ed8ce280a217629294ba51dc217c5a2c Mon Sep 17 00:00:00 2001 From: Scott Mayhew Date: Tue, 10 Dec 2019 07:31:12 -0500 Subject: NFS: Convert mount option parsing to use functionality from fs_parser.h Split out from commit "NFS: Add fs_context support." Convert existing mount option definitions to fs_parameter_enum's and fs_parameter_spec's. Parse mount options using fs_parse() and lookup_constant(). Notes: 1) Fixed a typo in the udp6 definition in nfs_xprt_protocol_tokens from the original commit. 2) fs_parse() expects an fs_context as the first arg so that any errors can be logged to the fs_context. We're passing NULL for the fs_context (this will change in commit "NFS: Add fs_context support.") which is okay as it will cause logfc() to do a printk() instead. 3) fs_parse() expects an fs_paramter as the third arg. We're building an fs_parameter manually in nfs_fs_context_parse_option(), which will go away in commit "NFS: Add fs_context support.". Signed-off-by: Scott Mayhew Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 787 ++++++++++++++++++++++++---------------------------- 1 file changed, 364 insertions(+), 423 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 44531443a92b..9a3162055d5d 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -11,7 +11,8 @@ #include #include -#include +#include +#include #include #include #include @@ -28,218 +29,215 @@ #define NFS_MAX_CONNECTIONS 16 -enum { - /* Mount options that take no arguments */ - Opt_soft, Opt_softerr, Opt_hard, - Opt_posix, Opt_noposix, - Opt_cto, Opt_nocto, - Opt_ac, Opt_noac, - Opt_lock, Opt_nolock, - Opt_udp, Opt_tcp, Opt_rdma, - Opt_acl, Opt_noacl, - Opt_rdirplus, Opt_nordirplus, - Opt_sharecache, Opt_nosharecache, - Opt_resvport, Opt_noresvport, - Opt_fscache, Opt_nofscache, - Opt_migration, Opt_nomigration, - - /* Mount options that take integer arguments */ - Opt_port, - Opt_rsize, Opt_wsize, Opt_bsize, - Opt_timeo, Opt_retrans, - Opt_acregmin, Opt_acregmax, - Opt_acdirmin, Opt_acdirmax, +enum nfs_param { + Opt_ac, + Opt_acdirmax, + Opt_acdirmin, + Opt_acl, + Opt_acregmax, + Opt_acregmin, Opt_actimeo, - Opt_namelen, + Opt_addr, + Opt_bg, + Opt_bsize, + Opt_clientaddr, + Opt_cto, + Opt_fg, + Opt_fscache, + Opt_hard, + Opt_intr, + Opt_local_lock, + Opt_lock, + Opt_lookupcache, + Opt_migration, + Opt_minorversion, + Opt_mountaddr, + Opt_mounthost, Opt_mountport, + Opt_mountproto, Opt_mountvers, - Opt_minorversion, - - /* Mount options that take string arguments */ - Opt_nfsvers, - Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, - Opt_addr, Opt_mountaddr, Opt_clientaddr, + Opt_namelen, Opt_nconnect, - Opt_lookupcache, - Opt_fscache_uniq, - Opt_local_lock, - - /* Special mount options */ - Opt_userspace, Opt_deprecated, Opt_sloppy, - - Opt_err + Opt_port, + Opt_posix, + Opt_proto, + Opt_rdirplus, + Opt_rdma, + Opt_resvport, + Opt_retrans, + Opt_retry, + Opt_rsize, + Opt_sec, + Opt_sharecache, + Opt_sloppy, + Opt_soft, + Opt_softerr, + Opt_source, + Opt_tcp, + Opt_timeo, + Opt_udp, + Opt_v, + Opt_vers, + Opt_wsize, }; -static const match_table_t nfs_mount_option_tokens = { - { Opt_userspace, "bg" }, - { Opt_userspace, "fg" }, - { Opt_userspace, "retry=%s" }, - - { Opt_sloppy, "sloppy" }, - - { Opt_soft, "soft" }, - { Opt_softerr, "softerr" }, - { Opt_hard, "hard" }, - { Opt_deprecated, "intr" }, - { Opt_deprecated, "nointr" }, - { Opt_posix, "posix" }, - { Opt_noposix, "noposix" }, - { Opt_cto, "cto" }, - { Opt_nocto, "nocto" }, - { Opt_ac, "ac" }, - { Opt_noac, "noac" }, - { Opt_lock, "lock" }, - { Opt_nolock, "nolock" }, - { Opt_udp, "udp" }, - { Opt_tcp, "tcp" }, - { Opt_rdma, "rdma" }, - { Opt_acl, "acl" }, - { Opt_noacl, "noacl" }, - { Opt_rdirplus, "rdirplus" }, - { Opt_nordirplus, "nordirplus" }, - { Opt_sharecache, "sharecache" }, - { Opt_nosharecache, "nosharecache" }, - { Opt_resvport, "resvport" }, - { Opt_noresvport, "noresvport" }, - { Opt_fscache, "fsc" }, - { Opt_nofscache, "nofsc" }, - { Opt_migration, "migration" }, - { Opt_nomigration, "nomigration" }, - - { Opt_port, "port=%s" }, - { Opt_rsize, "rsize=%s" }, - { Opt_wsize, "wsize=%s" }, - { Opt_bsize, "bsize=%s" }, - { Opt_timeo, "timeo=%s" }, - { Opt_retrans, "retrans=%s" }, - { Opt_acregmin, "acregmin=%s" }, - { Opt_acregmax, "acregmax=%s" }, - { Opt_acdirmin, "acdirmin=%s" }, - { Opt_acdirmax, "acdirmax=%s" }, - { Opt_actimeo, "actimeo=%s" }, - { Opt_namelen, "namlen=%s" }, - { Opt_mountport, "mountport=%s" }, - { Opt_mountvers, "mountvers=%s" }, - { Opt_minorversion, "minorversion=%s" }, - - { Opt_nfsvers, "nfsvers=%s" }, - { Opt_nfsvers, "vers=%s" }, - - { Opt_sec, "sec=%s" }, - { Opt_proto, "proto=%s" }, - { Opt_mountproto, "mountproto=%s" }, - { Opt_addr, "addr=%s" }, - { Opt_clientaddr, "clientaddr=%s" }, - { Opt_mounthost, "mounthost=%s" }, - { Opt_mountaddr, "mountaddr=%s" }, - - { Opt_nconnect, "nconnect=%s" }, - - { Opt_lookupcache, "lookupcache=%s" }, - { Opt_fscache_uniq, "fsc=%s" }, - { Opt_local_lock, "local_lock=%s" }, - - /* The following needs to be listed after all other options */ - { Opt_nfsvers, "v%s" }, - - { Opt_err, NULL } +static const struct fs_parameter_spec nfs_param_specs[] = { + fsparam_flag_no("ac", Opt_ac), + fsparam_u32 ("acdirmax", Opt_acdirmax), + fsparam_u32 ("acdirmin", Opt_acdirmin), + fsparam_flag_no("acl", Opt_acl), + fsparam_u32 ("acregmax", Opt_acregmax), + fsparam_u32 ("acregmin", Opt_acregmin), + fsparam_u32 ("actimeo", Opt_actimeo), + fsparam_string("addr", Opt_addr), + fsparam_flag ("bg", Opt_bg), + fsparam_u32 ("bsize", Opt_bsize), + fsparam_string("clientaddr", Opt_clientaddr), + fsparam_flag_no("cto", Opt_cto), + fsparam_flag ("fg", Opt_fg), + __fsparam(fs_param_is_string, "fsc", Opt_fscache, + fs_param_neg_with_no|fs_param_v_optional), + fsparam_flag ("hard", Opt_hard), + __fsparam(fs_param_is_flag, "intr", Opt_intr, + fs_param_neg_with_no|fs_param_deprecated), + fsparam_enum ("local_lock", Opt_local_lock), + fsparam_flag_no("lock", Opt_lock), + fsparam_enum ("lookupcache", Opt_lookupcache), + fsparam_flag_no("migration", Opt_migration), + fsparam_u32 ("minorversion", Opt_minorversion), + fsparam_string("mountaddr", Opt_mountaddr), + fsparam_string("mounthost", Opt_mounthost), + fsparam_u32 ("mountport", Opt_mountport), + fsparam_string("mountproto", Opt_mountproto), + fsparam_u32 ("mountvers", Opt_mountvers), + fsparam_u32 ("namlen", Opt_namelen), + fsparam_u32 ("nconnect", Opt_nconnect), + fsparam_string("nfsvers", Opt_vers), + fsparam_u32 ("port", Opt_port), + fsparam_flag_no("posix", Opt_posix), + fsparam_string("proto", Opt_proto), + fsparam_flag_no("rdirplus", Opt_rdirplus), + fsparam_flag ("rdma", Opt_rdma), + fsparam_flag_no("resvport", Opt_resvport), + fsparam_u32 ("retrans", Opt_retrans), + fsparam_string("retry", Opt_retry), + fsparam_u32 ("rsize", Opt_rsize), + fsparam_string("sec", Opt_sec), + fsparam_flag_no("sharecache", Opt_sharecache), + fsparam_flag ("sloppy", Opt_sloppy), + fsparam_flag ("soft", Opt_soft), + fsparam_flag ("softerr", Opt_softerr), + fsparam_string("source", Opt_source), + fsparam_flag ("tcp", Opt_tcp), + fsparam_u32 ("timeo", Opt_timeo), + fsparam_flag ("udp", Opt_udp), + fsparam_flag ("v2", Opt_v), + fsparam_flag ("v3", Opt_v), + fsparam_flag ("v4", Opt_v), + fsparam_flag ("v4.0", Opt_v), + fsparam_flag ("v4.1", Opt_v), + fsparam_flag ("v4.2", Opt_v), + fsparam_string("vers", Opt_vers), + fsparam_u32 ("wsize", Opt_wsize), + {} }; enum { - Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, - Opt_xprt_rdma6, - - Opt_xprt_err -}; - -static const match_table_t nfs_xprt_protocol_tokens = { - { Opt_xprt_udp, "udp" }, - { Opt_xprt_udp6, "udp6" }, - { Opt_xprt_tcp, "tcp" }, - { Opt_xprt_tcp6, "tcp6" }, - { Opt_xprt_rdma, "rdma" }, - { Opt_xprt_rdma6, "rdma6" }, - - { Opt_xprt_err, NULL } + Opt_local_lock_all, + Opt_local_lock_flock, + Opt_local_lock_none, + Opt_local_lock_posix, }; enum { - Opt_sec_none, Opt_sec_sys, - Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, - Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, - Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, - - Opt_sec_err + Opt_lookupcache_all, + Opt_lookupcache_none, + Opt_lookupcache_positive, }; -static const match_table_t nfs_secflavor_tokens = { - { Opt_sec_none, "none" }, - { Opt_sec_none, "null" }, - { Opt_sec_sys, "sys" }, - - { Opt_sec_krb5, "krb5" }, - { Opt_sec_krb5i, "krb5i" }, - { Opt_sec_krb5p, "krb5p" }, - - { Opt_sec_lkey, "lkey" }, - { Opt_sec_lkeyi, "lkeyi" }, - { Opt_sec_lkeyp, "lkeyp" }, - - { Opt_sec_spkm, "spkm3" }, - { Opt_sec_spkmi, "spkm3i" }, - { Opt_sec_spkmp, "spkm3p" }, +static const struct fs_parameter_enum nfs_param_enums[] = { + { Opt_local_lock, "all", Opt_local_lock_all }, + { Opt_local_lock, "flock", Opt_local_lock_flock }, + { Opt_local_lock, "none", Opt_local_lock_none }, + { Opt_local_lock, "posix", Opt_local_lock_posix }, + { Opt_lookupcache, "all", Opt_lookupcache_all }, + { Opt_lookupcache, "none", Opt_lookupcache_none }, + { Opt_lookupcache, "pos", Opt_lookupcache_positive }, + { Opt_lookupcache, "positive", Opt_lookupcache_positive }, + {} +}; - { Opt_sec_err, NULL } +static const struct fs_parameter_description nfs_fs_parameters = { + .name = "nfs", + .specs = nfs_param_specs, + .enums = nfs_param_enums, }; enum { - Opt_lookupcache_all, Opt_lookupcache_positive, - Opt_lookupcache_none, - - Opt_lookupcache_err + Opt_vers_2, + Opt_vers_3, + Opt_vers_4, + Opt_vers_4_0, + Opt_vers_4_1, + Opt_vers_4_2, }; -static const match_table_t nfs_lookupcache_tokens = { - { Opt_lookupcache_all, "all" }, - { Opt_lookupcache_positive, "pos" }, - { Opt_lookupcache_positive, "positive" }, - { Opt_lookupcache_none, "none" }, - - { Opt_lookupcache_err, NULL } +static const struct constant_table nfs_vers_tokens[] = { + { "2", Opt_vers_2 }, + { "3", Opt_vers_3 }, + { "4", Opt_vers_4 }, + { "4.0", Opt_vers_4_0 }, + { "4.1", Opt_vers_4_1 }, + { "4.2", Opt_vers_4_2 }, }; enum { - Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, - Opt_local_lock_none, - - Opt_local_lock_err + Opt_xprt_rdma, + Opt_xprt_rdma6, + Opt_xprt_tcp, + Opt_xprt_tcp6, + Opt_xprt_udp, + Opt_xprt_udp6, + nr__Opt_xprt }; -static const match_table_t nfs_local_lock_tokens = { - { Opt_local_lock_all, "all" }, - { Opt_local_lock_flock, "flock" }, - { Opt_local_lock_posix, "posix" }, - { Opt_local_lock_none, "none" }, - - { Opt_local_lock_err, NULL } +static const struct constant_table nfs_xprt_protocol_tokens[nr__Opt_xprt] = { + { "rdma", Opt_xprt_rdma }, + { "rdma6", Opt_xprt_rdma6 }, + { "tcp", Opt_xprt_tcp }, + { "tcp6", Opt_xprt_tcp6 }, + { "udp", Opt_xprt_udp }, + { "udp6", Opt_xprt_udp6 }, }; enum { - Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, - Opt_vers_4_1, Opt_vers_4_2, - - Opt_vers_err + Opt_sec_krb5, + Opt_sec_krb5i, + Opt_sec_krb5p, + Opt_sec_lkey, + Opt_sec_lkeyi, + Opt_sec_lkeyp, + Opt_sec_none, + Opt_sec_spkm, + Opt_sec_spkmi, + Opt_sec_spkmp, + Opt_sec_sys, + nr__Opt_sec }; -static const match_table_t nfs_vers_tokens = { - { Opt_vers_2, "2" }, - { Opt_vers_3, "3" }, - { Opt_vers_4, "4" }, - { Opt_vers_4_0, "4.0" }, - { Opt_vers_4_1, "4.1" }, - { Opt_vers_4_2, "4.2" }, - - { Opt_vers_err, NULL } +static const struct constant_table nfs_secflavor_tokens[] = { + { "krb5", Opt_sec_krb5 }, + { "krb5i", Opt_sec_krb5i }, + { "krb5p", Opt_sec_krb5p }, + { "lkey", Opt_sec_lkey }, + { "lkeyi", Opt_sec_lkeyi }, + { "lkeyp", Opt_sec_lkeyp }, + { "none", Opt_sec_none }, + { "null", Opt_sec_none }, + { "spkm3", Opt_sec_spkm }, + { "spkm3i", Opt_sec_spkmi }, + { "spkm3p", Opt_sec_spkmp }, + { "sys", Opt_sec_sys }, }; struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) @@ -368,17 +366,19 @@ static int nfs_auth_info_add(struct nfs_fs_context *ctx, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) +static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, + struct fs_parameter *param) { - substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; - char *p; + char *string = param->string, *p; int ret; - dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); + dfprintk(MOUNT, "NFS: parsing %s=%s option\n", param->key, param->string); - while ((p = strsep(&value, ":")) != NULL) { - switch (match_token(p, nfs_secflavor_tokens, args)) { + while ((p = strsep(&string, ":")) != NULL) { + if (!*p) + continue; + switch (lookup_constant(nfs_secflavor_tokens, p, -1)) { case Opt_sec_none: pseudoflavor = RPC_AUTH_NULL; break; @@ -427,11 +427,10 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) } static int nfs_parse_version_string(struct nfs_fs_context *ctx, - char *string, - substring_t *args) + const char *string) { ctx->flags &= ~NFS_MOUNT_VER3; - switch (match_token(string, nfs_vers_tokens, args)) { + switch (lookup_constant(nfs_vers_tokens, string, -1)) { case Opt_vers_2: ctx->version = 2; break; @@ -465,64 +464,24 @@ static int nfs_parse_version_string(struct nfs_fs_context *ctx, return 0; } -static int nfs_get_option_str(substring_t args[], char **option) -{ - kfree(*option); - *option = match_strdup(args); - return !*option; -} - -static int nfs_get_option_ui(struct nfs_fs_context *ctx, - substring_t args[], unsigned int *option) -{ - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - return kstrtouint(ctx->buf, 10, option); -} - -static int nfs_get_option_ui_bound(struct nfs_fs_context *ctx, - substring_t args[], unsigned int *option, - unsigned int l_bound, unsigned u_bound) -{ - int ret; - - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - ret = kstrtouint(ctx->buf, 10, option); - if (ret < 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - -static int nfs_get_option_us_bound(struct nfs_fs_context *ctx, - substring_t args[], unsigned short *option, - unsigned short l_bound, - unsigned short u_bound) -{ - int ret; - - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - ret = kstrtou16(ctx->buf, 10, option); - if (ret < 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - /* - * Parse a single mount option in "key[=val]" form. + * Parse a single mount parameter. */ -static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) +static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, + struct fs_parameter *param) { - substring_t args[MAX_OPT_ARGS]; - char *string; - int token, ret; + struct fs_parse_result result; + unsigned short protofamily, mountfamily; + unsigned int len; + int ret, opt; + + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + opt = fs_parse(NULL, &nfs_fs_parameters, param, &result); + if (opt < 0) + return ctx->sloppy ? 1 : opt; - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { + switch (opt) { /* * boolean options: foo/nofoo */ @@ -538,30 +497,31 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); break; case Opt_posix: - ctx->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - ctx->flags &= ~NFS_MOUNT_POSIX; + if (result.negated) + ctx->flags &= ~NFS_MOUNT_POSIX; + else + ctx->flags |= NFS_MOUNT_POSIX; break; case Opt_cto: - ctx->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - ctx->flags |= NFS_MOUNT_NOCTO; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOCTO; + else + ctx->flags &= ~NFS_MOUNT_NOCTO; break; case Opt_ac: - ctx->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - ctx->flags |= NFS_MOUNT_NOAC; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOAC; + else + ctx->flags &= ~NFS_MOUNT_NOAC; break; case Opt_lock: - ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + if (result.negated) { + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + } else { + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + } break; case Opt_udp: ctx->flags &= ~NFS_MOUNT_TCP; @@ -574,195 +534,177 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) case Opt_rdma: ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); + xprt_load_transport(param->key); break; case Opt_acl: - ctx->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - ctx->flags |= NFS_MOUNT_NOACL; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOACL; + else + ctx->flags &= ~NFS_MOUNT_NOACL; break; case Opt_rdirplus: - ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - ctx->flags |= NFS_MOUNT_NORDIRPLUS; + if (result.negated) + ctx->flags |= NFS_MOUNT_NORDIRPLUS; + else + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; break; case Opt_sharecache: - ctx->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - ctx->flags |= NFS_MOUNT_UNSHARED; + if (result.negated) + ctx->flags |= NFS_MOUNT_UNSHARED; + else + ctx->flags &= ~NFS_MOUNT_UNSHARED; break; case Opt_resvport: - ctx->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - ctx->flags |= NFS_MOUNT_NORESVPORT; + if (result.negated) + ctx->flags |= NFS_MOUNT_NORESVPORT; + else + ctx->flags &= ~NFS_MOUNT_NORESVPORT; break; case Opt_fscache: - ctx->options |= NFS_OPTION_FSCACHE; kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_nofscache: - ctx->options &= ~NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; + ctx->fscache_uniq = param->string; + param->string = NULL; + if (result.negated) + ctx->options &= ~NFS_OPTION_FSCACHE; + else + ctx->options |= NFS_OPTION_FSCACHE; break; case Opt_migration: - ctx->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - ctx->options &= ~NFS_OPTION_MIGRATION; + if (result.negated) + ctx->options &= ~NFS_OPTION_MIGRATION; + else + ctx->options |= NFS_OPTION_MIGRATION; break; /* * options that take numeric values */ case Opt_port: - if (nfs_get_option_ui_bound(ctx, args, &ctx->nfs_server.port, - 0, USHRT_MAX)) - goto out_invalid_value; + if (result.uint_32 > USHRT_MAX) + goto out_of_bounds; + ctx->nfs_server.port = result.uint_32; break; case Opt_rsize: - if (nfs_get_option_ui(ctx, args, &ctx->rsize)) - goto out_invalid_value; + ctx->rsize = result.uint_32; break; case Opt_wsize: - if (nfs_get_option_ui(ctx, args, &ctx->wsize)) - goto out_invalid_value; + ctx->wsize = result.uint_32; break; case Opt_bsize: - if (nfs_get_option_ui(ctx, args, &ctx->bsize)) - goto out_invalid_value; + ctx->bsize = result.uint_32; break; case Opt_timeo: - if (nfs_get_option_ui_bound(ctx, args, &ctx->timeo, 1, INT_MAX)) - goto out_invalid_value; + if (result.uint_32 < 1 || result.uint_32 > INT_MAX) + goto out_of_bounds; + ctx->timeo = result.uint_32; break; case Opt_retrans: - if (nfs_get_option_ui_bound(ctx, args, &ctx->retrans, 0, INT_MAX)) - goto out_invalid_value; + if (result.uint_32 > INT_MAX) + goto out_of_bounds; + ctx->retrans = result.uint_32; break; case Opt_acregmin: - if (nfs_get_option_ui(ctx, args, &ctx->acregmin)) - goto out_invalid_value; + ctx->acregmin = result.uint_32; break; case Opt_acregmax: - if (nfs_get_option_ui(ctx, args, &ctx->acregmax)) - goto out_invalid_value; + ctx->acregmax = result.uint_32; break; case Opt_acdirmin: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmin)) - goto out_invalid_value; + ctx->acdirmin = result.uint_32; break; case Opt_acdirmax: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) - goto out_invalid_value; + ctx->acdirmax = result.uint_32; break; case Opt_actimeo: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) - goto out_invalid_value; - ctx->acregmin = ctx->acregmax = - ctx->acdirmin = ctx->acdirmax; + ctx->acregmin = result.uint_32; + ctx->acregmax = result.uint_32; + ctx->acdirmin = result.uint_32; + ctx->acdirmax = result.uint_32; break; case Opt_namelen: - if (nfs_get_option_ui(ctx, args, &ctx->namlen)) - goto out_invalid_value; + ctx->namlen = result.uint_32; break; case Opt_mountport: - if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.port, - 0, USHRT_MAX)) - goto out_invalid_value; + if (result.uint_32 > USHRT_MAX) + goto out_of_bounds; + ctx->mount_server.port = result.uint_32; break; case Opt_mountvers: - if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.version, - NFS_MNT_VERSION, NFS_MNT3_VERSION)) - goto out_invalid_value; + if (result.uint_32 < NFS_MNT_VERSION || + result.uint_32 > NFS_MNT3_VERSION) + goto out_of_bounds; + ctx->mount_server.version = result.uint_32; break; case Opt_minorversion: - if (nfs_get_option_ui_bound(ctx, args, &ctx->minorversion, - 0, NFS4_MAX_MINOR_VERSION)) - goto out_invalid_value; + if (result.uint_32 > NFS4_MAX_MINOR_VERSION) + goto out_of_bounds; + ctx->minorversion = result.uint_32; break; /* * options that take text values */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ret = nfs_parse_version_string(ctx, string, args); - kfree(string); + case Opt_v: + ret = nfs_parse_version_string(ctx, param->key + 1); + if (ret < 0) + return ret; + break; + case Opt_vers: + ret = nfs_parse_version_string(ctx, param->string); if (ret < 0) return ret; break; case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ret = nfs_parse_security_flavors(ctx, string); - kfree(string); + ret = nfs_parse_security_flavors(ctx, param); if (ret < 0) return ret; break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_xprt_protocol_tokens, args); - ctx->protofamily = AF_INET; - switch (token) { + case Opt_proto: + protofamily = AF_INET; + switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { case Opt_xprt_udp6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->flags &= ~NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); + xprt_load_transport(param->string); break; default: - kfree(string); dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } - kfree(string); + + ctx->protofamily = protofamily; break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_xprt_protocol_tokens, args); - kfree(string); - ctx->mountfamily = AF_INET; - switch (token) { + case Opt_mountproto: + mountfamily = AF_INET; + switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { case Opt_xprt_udp6: - ctx->mountfamily = AF_INET6; + mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - ctx->mountfamily = AF_INET6; + mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; @@ -772,51 +714,42 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } + ctx->mountfamily = mountfamily; break; + case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->nfs_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - &ctx->nfs_server.address, - sizeof(ctx->nfs_server._address)); - kfree(string); - if (ctx->nfs_server.addrlen == 0) + len = rpc_pton(ctx->net, param->string, param->size, + &ctx->nfs_server.address, + sizeof(ctx->nfs_server._address)); + if (len == 0) goto out_invalid_address; + ctx->nfs_server.addrlen = len; break; case Opt_clientaddr: - if (nfs_get_option_str(args, &ctx->client_address)) - goto out_nomem; + kfree(ctx->client_address); + ctx->client_address = param->string; + param->string = NULL; break; case Opt_mounthost: - if (nfs_get_option_str(args, &ctx->mount_server.hostname)) - goto out_nomem; + kfree(ctx->mount_server.hostname); + ctx->mount_server.hostname = param->string; + param->string = NULL; break; case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->mount_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - &ctx->mount_server.address, - sizeof(ctx->mount_server._address)); - kfree(string); - if (ctx->mount_server.addrlen == 0) + len = rpc_pton(ctx->net, param->string, param->size, + &ctx->mount_server.address, + sizeof(ctx->mount_server._address)); + if (len == 0) goto out_invalid_address; + ctx->mount_server.addrlen = len; break; case Opt_nconnect: - if (nfs_get_option_us_bound(ctx, args, &ctx->nfs_server.nconnect, - 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; + if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_CONNECTIONS) + goto out_of_bounds; + ctx->nfs_server.nconnect = result.uint_32; break; case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { + switch (result.uint_32) { case Opt_lookupcache_all: ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; @@ -828,22 +761,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: - dfprintk(MOUNT, "NFS: invalid lookupcache argument\n"); - return -EINVAL; + goto out_invalid_value; } break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &ctx->fscache_uniq)) - goto out_nomem; - ctx->options |= NFS_OPTION_FSCACHE; - break; case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, args); - kfree(string); - switch (token) { + switch (result.uint_32) { case Opt_local_lock_all: ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); @@ -859,8 +781,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) NFS_MOUNT_LOCAL_FCNTL); break; default: - dfprintk(MOUNT, "NFS: invalid local_lock argument\n"); - return -EINVAL; + goto out_invalid_value; } break; @@ -868,30 +789,50 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) * Special options */ case Opt_sloppy: - ctx->sloppy = 1; + ctx->sloppy = true; dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option '%s'\n", p); - break; - - default: - dfprintk(MOUNT, "NFS: unrecognized mount option '%s'\n", p); - return -EINVAL; } return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return -EINVAL; out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + printk(KERN_INFO "NFS: Bad mount option value specified\n"); return -EINVAL; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return -ENOMEM; +out_invalid_address: + printk(KERN_INFO "NFS: Bad IP address specified\n"); + return -EINVAL; +out_of_bounds: + printk(KERN_INFO "NFS: Value for '%s' out of range\n", param->key); + return -ERANGE; +} + +/* cribbed from generic_parse_monolithic and vfs_parse_fs_string */ +static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) +{ + int ret; + char *key = p, *value; + size_t v_size = 0; + struct fs_parameter param; + + memset(¶m, 0, sizeof(param)); + value = strchr(key, '='); + if (value && value != key) { + *value++ = 0; + v_size = strlen(value); + } + param.key = key; + param.type = fs_value_is_flag; + param.size = v_size; + if (v_size > 0) { + param.type = fs_value_is_string; + param.string = kmemdup_nul(value, v_size, GFP_KERNEL); + if (!param.string) + return -ENOMEM; + } + ret = nfs_fs_context_parse_param(ctx, ¶m); + kfree(param.string); + return ret; } /* -- cgit v1.2.3-59-g8ed1b From f2aedb713c284429987dc66c7aaf38decfc8da2a Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 10 Dec 2019 07:31:13 -0500 Subject: NFS: Add fs_context support. Add filesystem context support to NFS, parsing the options in advance and attaching the information to struct nfs_fs_context. The highlights are: (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context. This structure represents NFS's superblock config. (*) Make use of the VFS's parsing support to split comma-separated lists (*) Pin the NFS protocol module in the nfs_fs_context. (*) Attach supplementary error information to fs_context. This has the downside that these strings must be static and can't be formatted. (*) Remove the auxiliary file_system_type structs since the information necessary can be conveyed in the nfs_fs_context struct instead. (*) Root mounts are made by duplicating the config for the requested mount so as to have the same parameters. Submounts pick up their parameters from the parent superblock. [AV -- retrans is u32, not string] [SM -- Renamed cfg to ctx in a few functions in an earlier patch] [SM -- Moved fs_context mount option parsing to an earlier patch] [SM -- Moved fs_context error logging to a later patch] [SM -- Fixed printks in nfs4_try_get_tree() and nfs4_get_referral_tree()] [SM -- Added is_remount_fc() helper] [SM -- Deferred some refactoring to a later patch] [SM -- Fixed referral mounts, which were broken in the original patch] [SM -- Fixed leak of nfs_fattr when fs_context is freed] Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Scott Mayhew Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 470 ++++++++++++++++++++++++++++++++---------------- fs/nfs/internal.h | 74 ++++---- fs/nfs/namespace.c | 136 ++++++++------ fs/nfs/nfs3proc.c | 2 +- fs/nfs/nfs4_fs.h | 9 +- fs/nfs/nfs4file.c | 1 + fs/nfs/nfs4namespace.c | 293 +++++++++++++++++------------- fs/nfs/nfs4proc.c | 2 +- fs/nfs/nfs4super.c | 151 ++++++++-------- fs/nfs/proc.c | 2 +- fs/nfs/super.c | 286 ++++++++--------------------- include/linux/nfs_xdr.h | 6 +- 12 files changed, 773 insertions(+), 659 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 9a3162055d5d..ac1a8d7d7393 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -3,6 +3,7 @@ * linux/fs/nfs/fs_context.c * * Copyright (C) 1992 Rick Sladkey + * Conversion to new mount api Copyright (C) David Howells * * NFS mount handling. * @@ -467,21 +468,31 @@ static int nfs_parse_version_string(struct nfs_fs_context *ctx, /* * Parse a single mount parameter. */ -static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, +static int nfs_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param) { struct fs_parse_result result; + struct nfs_fs_context *ctx = nfs_fc2context(fc); unsigned short protofamily, mountfamily; unsigned int len; int ret, opt; dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); - opt = fs_parse(NULL, &nfs_fs_parameters, param, &result); + opt = fs_parse(fc, &nfs_fs_parameters, param, &result); if (opt < 0) return ctx->sloppy ? 1 : opt; switch (opt) { + case Opt_source: + if (fc->source) { + dfprintk(MOUNT, "NFS: Multiple sources not supported\n"); + return -EINVAL; + } + fc->source = param->string; + param->string = NULL; + break; + /* * boolean options: foo/nofoo */ @@ -807,112 +818,6 @@ out_of_bounds: return -ERANGE; } -/* cribbed from generic_parse_monolithic and vfs_parse_fs_string */ -static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) -{ - int ret; - char *key = p, *value; - size_t v_size = 0; - struct fs_parameter param; - - memset(¶m, 0, sizeof(param)); - value = strchr(key, '='); - if (value && value != key) { - *value++ = 0; - v_size = strlen(value); - } - param.key = key; - param.type = fs_value_is_flag; - param.size = v_size; - if (v_size > 0) { - param.type = fs_value_is_string; - param.string = kmemdup_nul(value, v_size, GFP_KERNEL); - if (!param.string) - return -ENOMEM; - } - ret = nfs_fs_context_parse_param(ctx, ¶m); - kfree(param.string); - return ret; -} - -/* - * Error-check and convert a string of mount options from user space into - * a data structure. The whole mount string is processed; bad options are - * skipped as they are encountered. If there were no errors, return 1; - * otherwise return 0 (zero). - */ -int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx) -{ - char *p; - int rc, sloppy = 0, invalid_option = 0; - - if (!raw) { - dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); - return 1; - } - dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); - - rc = security_sb_eat_lsm_opts(raw, &ctx->lsm_opts); - if (rc) - goto out_security_failure; - - while ((p = strsep(&raw, ",")) != NULL) { - if (!*p) - continue; - if (nfs_fs_context_parse_option(ctx, p) < 0) - invalid_option = true; - } - - if (!sloppy && invalid_option) - return 0; - - if (ctx->minorversion && ctx->version != 4) - goto out_minorversion_mismatch; - - if (ctx->options & NFS_OPTION_MIGRATION && - (ctx->version != 4 || ctx->minorversion != 0)) - goto out_migration_misuse; - - /* - * verify that any proto=/mountproto= options match the address - * families in the addr=/mountaddr= options. - */ - if (ctx->protofamily != AF_UNSPEC && - ctx->protofamily != ctx->nfs_server.address.sa_family) - goto out_proto_mismatch; - - if (ctx->mountfamily != AF_UNSPEC) { - if (ctx->mount_server.addrlen) { - if (ctx->mountfamily != ctx->mount_server.address.sa_family) - goto out_mountproto_mismatch; - } else { - if (ctx->mountfamily != ctx->nfs_server.address.sa_family) - goto out_mountproto_mismatch; - } - } - - return 1; - -out_minorversion_mismatch: - printk(KERN_INFO "NFS: mount option vers=%u does not support " - "minorversion=%u\n", ctx->version, ctx->minorversion); - return 0; -out_mountproto_mismatch: - printk(KERN_INFO "NFS: mount server address does not match mountproto= " - "option\n"); - return 0; -out_proto_mismatch: - printk(KERN_INFO "NFS: server address does not match proto= option\n"); - return 0; -out_migration_misuse: - printk(KERN_INFO - "NFS: 'migration' not supported for this NFS version\n"); - return -EINVAL; -out_security_failure: - printk(KERN_INFO "NFS: security options invalid: %d\n", rc); - return 0; -} - /* * Split "dev_name" into "hostname:export_path". * @@ -990,6 +895,11 @@ out_path: return -ENAMETOOLONG; } +static inline bool is_remount_fc(struct fs_context *fc) +{ + return fc->root != NULL; +} + /* * Parse monolithic NFS2/NFS3 mount data * - fills in the mount root filehandle @@ -1006,12 +916,11 @@ out_path: * + breaking back: trying proto=udp after proto=tcp, v2 after v3, * mountproto=tcp after mountproto=udp, and so on */ -static int nfs23_validate_mount_data(void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name) +static int nfs23_parse_monolithic(struct fs_context *fc, + struct nfs_mount_data *data) { - struct nfs_mount_data *data = (struct nfs_mount_data *)options; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct nfs_fh *mntfh = ctx->mount_info.mntfh; struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; @@ -1083,6 +992,9 @@ static int nfs23_validate_mount_data(void *options, ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; /* N.B. caller will free nfs_server.hostname in all cases */ ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); + if (!ctx->nfs_server.hostname) + goto out_nomem; + ctx->namlen = data->namlen; ctx->bsize = data->bsize; @@ -1090,8 +1002,6 @@ static int nfs23_validate_mount_data(void *options, ctx->selected_flavor = data->pseudoflavor; else ctx->selected_flavor = RPC_AUTH_UNIX; - if (!ctx->nfs_server.hostname) - goto out_nomem; if (!(data->flags & NFS_MOUNT_NONLM)) ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| @@ -1109,12 +1019,13 @@ static int nfs23_validate_mount_data(void *options, */ if (data->context[0]){ #ifdef CONFIG_SECURITY_SELINUX - int rc; + int ret; + data->context[NFS_MAX_CONTEXT_LEN] = '\0'; - rc = security_add_mnt_opt("context", data->context, - strlen(data->context), ctx->lsm_opts); - if (rc) - return rc; + ret = vfs_parse_fs_string(fc, "context", + data->context, strlen(data->context)); + if (ret < 0) + return ret; #else return -EINVAL; #endif @@ -1122,12 +1033,20 @@ static int nfs23_validate_mount_data(void *options, break; default: - return NFS_TEXT_DATA; + goto generic; } + ctx->skip_reconfig_option_check = true; return 0; +generic: + return generic_parse_monolithic(fc, data); + out_no_data: + if (is_remount_fc(fc)) { + ctx->skip_reconfig_option_check = true; + return 0; + } dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); return -EINVAL; @@ -1163,12 +1082,11 @@ static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx) /* * Validate NFSv4 mount options */ -static int nfs4_validate_mount_data(void *options, - struct nfs_fs_context *ctx, - const char *dev_name) +static int nfs4_parse_monolithic(struct fs_context *fc, + struct nfs4_mount_data *data) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; - struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; char *c; if (data == NULL) @@ -1218,7 +1136,7 @@ static int nfs4_validate_mount_data(void *options, ctx->client_address = c; /* - * Translate to nfs_fs_context, which nfs4_fill_super + * Translate to nfs_fs_context, which nfs_fill_super * can deal with. */ @@ -1238,12 +1156,20 @@ static int nfs4_validate_mount_data(void *options, break; default: - return NFS_TEXT_DATA; + goto generic; } + ctx->skip_reconfig_option_check = true; return 0; +generic: + return generic_parse_monolithic(fc, data); + out_no_data: + if (is_remount_fc(fc)) { + ctx->skip_reconfig_option_check = true; + return 0; + } dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); return -EINVAL; @@ -1260,39 +1186,66 @@ out_invalid_transport_udp: dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); return -EINVAL; } +#endif -int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name) -{ - if (fs_type == &nfs_fs_type) - return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); - return nfs4_validate_mount_data(options, ctx, dev_name); -} -#else -int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name) +/* + * Parse a monolithic block of data from sys_mount(). + */ +static int nfs_fs_context_parse_monolithic(struct fs_context *fc, + void *data) { - return nfs23_validate_mount_data(options, ctx, mntfh, dev_name); -} + if (fc->fs_type == &nfs_fs_type) + return nfs23_parse_monolithic(fc, data); + +#if IS_ENABLED(CONFIG_NFS_V4) + if (fc->fs_type == &nfs4_fs_type) + return nfs4_parse_monolithic(fc, data); #endif -int nfs_validate_text_mount_data(void *options, - struct nfs_fs_context *ctx, - const char *dev_name) + dfprintk(MOUNT, "NFS: Unsupported monolithic data version\n"); + return -EINVAL; +} + +/* + * Validate the preparsed information in the config. + */ +static int nfs_fs_context_validate(struct fs_context *fc) { - int port = 0; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct nfs_subversion *nfs_mod; + struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int max_namelen = PAGE_SIZE; int max_pathlen = NFS_MAXPATHLEN; - struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; + int port = 0; + int ret; - if (nfs_parse_mount_options((char *)options, ctx) == 0) - return -EINVAL; + if (!fc->source) + goto out_no_device_name; + + /* Check for sanity first. */ + if (ctx->minorversion && ctx->version != 4) + goto out_minorversion_mismatch; + + if (ctx->options & NFS_OPTION_MIGRATION && + (ctx->version != 4 || ctx->minorversion != 0)) + goto out_migration_misuse; + + /* Verify that any proto=/mountproto= options match the address + * families in the addr=/mountaddr= options. + */ + if (ctx->protofamily != AF_UNSPEC && + ctx->protofamily != ctx->nfs_server.address.sa_family) + goto out_proto_mismatch; + + if (ctx->mountfamily != AF_UNSPEC) { + if (ctx->mount_server.addrlen) { + if (ctx->mountfamily != ctx->mount_server.address.sa_family) + goto out_mountproto_mismatch; + } else { + if (ctx->mountfamily != ctx->nfs_server.address.sa_family) + goto out_mountproto_mismatch; + } + } if (!nfs_verify_server_address(sap)) goto out_no_address; @@ -1320,8 +1273,24 @@ int nfs_validate_text_mount_data(void *options, nfs_set_port(sap, &ctx->nfs_server.port, port); - return nfs_parse_devname(ctx, dev_name, max_namelen, max_pathlen); + ret = nfs_parse_devname(ctx, fc->source, max_namelen, max_pathlen); + if (ret < 0) + return ret; + + /* Load the NFS protocol module if we haven't done so yet */ + if (!ctx->mount_info.nfs_mod) { + nfs_mod = get_nfs_version(ctx->version); + if (IS_ERR(nfs_mod)) { + ret = PTR_ERR(nfs_mod); + goto out_version_unavailable; + } + ctx->mount_info.nfs_mod = nfs_mod; + } + return 0; +out_no_device_name: + dfprintk(MOUNT, "NFS: Device name not specified\n"); + return -EINVAL; #if !IS_ENABLED(CONFIG_NFS_V4) out_v4_not_compiled: dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); @@ -1331,8 +1300,201 @@ out_invalid_transport_udp: dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); return -EINVAL; #endif /* !CONFIG_NFS_V4 */ - out_no_address: dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); return -EINVAL; +out_mountproto_mismatch: + dfprintk(MOUNT, "NFS: Mount server address does not match mountproto= option\n"); + return -EINVAL; +out_proto_mismatch: + dfprintk(MOUNT, "NFS: Server address does not match proto= option\n"); + return -EINVAL; +out_minorversion_mismatch: + dfprintk(MOUNT, "NFS: Mount option vers=%u does not support minorversion=%u\n", + ctx->version, ctx->minorversion); + return -EINVAL; +out_migration_misuse: + dfprintk(MOUNT, "NFS: 'Migration' not supported for this NFS version\n"); + return -EINVAL; +out_version_unavailable: + dfprintk(MOUNT, "NFS: Version unavailable\n"); + return ret; +} + +/* + * Create an NFS superblock by the appropriate method. + */ +static int nfs_get_tree(struct fs_context *fc) +{ + struct nfs_fs_context *ctx = nfs_fc2context(fc); + int err = nfs_fs_context_validate(fc); + + if (err) + return err; + if (!ctx->internal) + return ctx->mount_info.nfs_mod->rpc_ops->try_get_tree(fc); + else + return nfs_get_tree_common(fc); } + +/* + * Handle duplication of a configuration. The caller copied *src into *sc, but + * it can't deal with resource pointers in the filesystem context, so we have + * to do that. We need to clear pointers, copy data or get extra refs as + * appropriate. + */ +static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) +{ + struct nfs_fs_context *src = nfs_fc2context(src_fc), *ctx; + + ctx = kmemdup(src, sizeof(struct nfs_fs_context), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->mount_info.mntfh = nfs_alloc_fhandle(); + if (!ctx->mount_info.mntfh) { + kfree(ctx); + return -ENOMEM; + } + nfs_copy_fh(ctx->mount_info.mntfh, src->mount_info.mntfh); + + __module_get(ctx->mount_info.nfs_mod->owner); + ctx->client_address = NULL; + ctx->mount_server.hostname = NULL; + ctx->nfs_server.export_path = NULL; + ctx->nfs_server.hostname = NULL; + ctx->fscache_uniq = NULL; + ctx->clone_data.addr = NULL; + ctx->clone_data.fattr = NULL; + fc->fs_private = ctx; + return 0; +} + +static void nfs_fs_context_free(struct fs_context *fc) +{ + struct nfs_fs_context *ctx = nfs_fc2context(fc); + + if (ctx) { + if (ctx->mount_info.server) + nfs_free_server(ctx->mount_info.server); + if (ctx->mount_info.nfs_mod) + put_nfs_version(ctx->mount_info.nfs_mod); + kfree(ctx->client_address); + kfree(ctx->mount_server.hostname); + kfree(ctx->nfs_server.export_path); + kfree(ctx->nfs_server.hostname); + kfree(ctx->fscache_uniq); + nfs_free_fhandle(ctx->mount_info.mntfh); + kfree(ctx->clone_data.addr); + nfs_free_fattr(ctx->clone_data.fattr); + kfree(ctx); + } +} + +static const struct fs_context_operations nfs_fs_context_ops = { + .free = nfs_fs_context_free, + .dup = nfs_fs_context_dup, + .parse_param = nfs_fs_context_parse_param, + .parse_monolithic = nfs_fs_context_parse_monolithic, + .get_tree = nfs_get_tree, + .reconfigure = nfs_reconfigure, +}; + +/* + * Prepare superblock configuration. We use the namespaces attached to the + * context. This may be the current process's namespaces, or it may be a + * container's namespaces. + */ +static int nfs_init_fs_context(struct fs_context *fc) +{ + struct nfs_fs_context *ctx; + + ctx = kzalloc(sizeof(struct nfs_fs_context), GFP_KERNEL); + if (unlikely(!ctx)) + return -ENOMEM; + + ctx->mount_info.ctx = ctx; + ctx->mount_info.mntfh = nfs_alloc_fhandle(); + if (unlikely(!ctx->mount_info.mntfh)) { + kfree(ctx); + return -ENOMEM; + } + + ctx->protofamily = AF_UNSPEC; + ctx->mountfamily = AF_UNSPEC; + ctx->mount_server.port = NFS_UNSPEC_PORT; + + if (fc->root) { + /* reconfigure, start with the current config */ + struct nfs_server *nfss = fc->root->d_sb->s_fs_info; + struct net *net = nfss->nfs_client->cl_net; + + ctx->flags = nfss->flags; + ctx->rsize = nfss->rsize; + ctx->wsize = nfss->wsize; + ctx->retrans = nfss->client->cl_timeout->to_retries; + ctx->selected_flavor = nfss->client->cl_auth->au_flavor; + ctx->acregmin = nfss->acregmin / HZ; + ctx->acregmax = nfss->acregmax / HZ; + ctx->acdirmin = nfss->acdirmin / HZ; + ctx->acdirmax = nfss->acdirmax / HZ; + ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; + ctx->nfs_server.port = nfss->port; + ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; + ctx->version = nfss->nfs_client->rpc_ops->version; + ctx->minorversion = nfss->nfs_client->cl_minorversion; + + memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, + ctx->nfs_server.addrlen); + + if (fc->net_ns != net) { + put_net(fc->net_ns); + fc->net_ns = get_net(net); + } + + ctx->mount_info.nfs_mod = nfss->nfs_client->cl_nfs_mod; + __module_get(ctx->mount_info.nfs_mod->owner); + } else { + /* defaults */ + ctx->timeo = NFS_UNSPEC_TIMEO; + ctx->retrans = NFS_UNSPEC_RETRANS; + ctx->acregmin = NFS_DEF_ACREGMIN; + ctx->acregmax = NFS_DEF_ACREGMAX; + ctx->acdirmin = NFS_DEF_ACDIRMIN; + ctx->acdirmax = NFS_DEF_ACDIRMAX; + ctx->nfs_server.port = NFS_UNSPEC_PORT; + ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; + ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; + ctx->minorversion = 0; + ctx->need_mount = true; + } + ctx->net = fc->net_ns; + fc->fs_private = ctx; + fc->ops = &nfs_fs_context_ops; + return 0; +} + +struct file_system_type nfs_fs_type = { + .owner = THIS_MODULE, + .name = "nfs", + .init_fs_context = nfs_init_fs_context, + .parameters = &nfs_fs_parameters, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; +MODULE_ALIAS_FS("nfs"); +EXPORT_SYMBOL_GPL(nfs_fs_type); + +#if IS_ENABLED(CONFIG_NFS_V4) +struct file_system_type nfs4_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .init_fs_context = nfs_init_fs_context, + .parameters = &nfs_fs_parameters, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; +MODULE_ALIAS_FS("nfs4"); +MODULE_ALIAS("nfs4"); +EXPORT_SYMBOL_GPL(nfs4_fs_type); +#endif /* CONFIG_NFS_V4 */ diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 003c2b8eb1e6..1cd09df9e0b5 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -4,7 +4,7 @@ */ #include "nfs4_fs.h" -#include +#include #include #include #include @@ -16,6 +16,7 @@ extern const struct export_operations nfs_export_ops; struct nfs_string; +struct nfs_pageio_descriptor; static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) { @@ -34,12 +35,13 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) struct nfs_clone_mount { const struct super_block *sb; - const struct dentry *dentry; + struct dentry *dentry; char *hostname; char *mnt_path; struct sockaddr *addr; size_t addrlen; rpc_authflavor_t authflavor; + struct nfs_fattr *fattr; }; /* @@ -78,10 +80,23 @@ struct nfs_client_initdata { const struct cred *cred; }; +struct nfs_mount_info { + unsigned int inherited_bsize; + struct nfs_fs_context *ctx; + struct nfs_clone_mount *cloned; + struct nfs_server *server; + struct nfs_fh *mntfh; + struct nfs_subversion *nfs_mod; +}; + /* * In-kernel mount arguments */ struct nfs_fs_context { + bool internal; + bool skip_reconfig_option_check; + bool need_mount; + bool sloppy; unsigned int flags; /* NFS{,4}_MOUNT_* flags */ unsigned int rsize, wsize; unsigned int timeo, retrans; @@ -98,8 +113,6 @@ struct nfs_fs_context { char *fscache_uniq; unsigned short protofamily; unsigned short mountfamily; - bool need_mount; - bool sloppy; struct { union { @@ -124,14 +137,23 @@ struct nfs_fs_context { int port; unsigned short protocol; unsigned short nconnect; + unsigned short export_path_len; } nfs_server; void *lsm_opts; struct net *net; char buf[32]; /* Parse buffer */ + + struct nfs_mount_info mount_info; + struct nfs_clone_mount clone_data; }; +static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) +{ + return fc->fs_private; +} + /* mount_clnt.c */ struct nfs_mount_request { struct sockaddr *sap; @@ -147,15 +169,6 @@ struct nfs_mount_request { struct net *net; }; -struct nfs_mount_info { - unsigned int inherited_bsize; - struct nfs_fs_context *ctx; - struct nfs_clone_mount *cloned; - struct nfs_server *server; - struct nfs_fh *mntfh; - struct nfs_subversion *nfs_mod; -}; - extern int nfs_mount(struct nfs_mount_request *info); extern void nfs_umount(const struct nfs_mount_request *info); @@ -235,22 +248,8 @@ static inline void nfs_fs_proc_exit(void) extern const struct svc_version nfs4_callback_version1; extern const struct svc_version nfs4_callback_version4; -struct nfs_pageio_descriptor; - -/* mount.c */ -#define NFS_TEXT_DATA 1 - -extern struct nfs_fs_context *nfs_alloc_parsed_mount_data(void); -extern void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx); -extern int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx); -extern int nfs_validate_mount_data(struct file_system_type *fs_type, - void *options, - struct nfs_fs_context *ctx, - struct nfs_fh *mntfh, - const char *dev_name); -extern int nfs_validate_text_mount_data(void *options, - struct nfs_fs_context *ctx, - const char *dev_name); +/* fs_context.c */ +extern struct file_system_type nfs_fs_type; /* pagelist.c */ extern int __init nfs_init_nfspagecache(void); @@ -411,14 +410,9 @@ extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); /* super.c */ extern const struct super_operations nfs_sops; -extern struct file_system_type nfs_fs_type; -extern struct file_system_type nfs_prepared_fs_type; -#if IS_ENABLED(CONFIG_NFS_V4) -extern struct file_system_type nfs4_referral_fs_type; -#endif bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); -struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); +int nfs_try_get_tree(struct fs_context *); +int nfs_get_tree_common(struct fs_context *); void nfs_kill_super(struct super_block *); extern struct rpc_stat nfs_rpcstat; @@ -446,10 +440,8 @@ static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) extern char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen, unsigned flags); extern struct vfsmount *nfs_d_automount(struct path *path); -struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); -struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, - struct nfs_fattr *, rpc_authflavor_t); +int nfs_submount(struct fs_context *, struct nfs_server *); +int nfs_do_submount(struct fs_context *); /* getroot.c */ extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, @@ -476,7 +468,7 @@ int nfs_show_options(struct seq_file *, struct dentry *); int nfs_show_devname(struct seq_file *, struct dentry *); int nfs_show_path(struct seq_file *, struct dentry *); int nfs_show_stats(struct seq_file *, struct dentry *); -int nfs_remount(struct super_block *sb, int *flags, char *raw_data); +int nfs_reconfigure(struct fs_context *); /* write.c */ extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index bfe607374feb..9b344fcd23b0 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -140,34 +140,65 @@ EXPORT_SYMBOL_GPL(nfs_path); */ struct vfsmount *nfs_d_automount(struct path *path) { - struct vfsmount *mnt; + struct nfs_fs_context *ctx; + struct fs_context *fc; + struct vfsmount *mnt = ERR_PTR(-ENOMEM); struct nfs_server *server = NFS_SERVER(d_inode(path->dentry)); - struct nfs_fh *fh = NULL; - struct nfs_fattr *fattr = NULL; + struct nfs_client *client = server->nfs_client; + int ret; if (IS_ROOT(path->dentry)) return ERR_PTR(-ESTALE); - mnt = ERR_PTR(-ENOMEM); - fh = nfs_alloc_fhandle(); - fattr = nfs_alloc_fattr(); - if (fh == NULL || fattr == NULL) - goto out; + /* Open a new filesystem context, transferring parameters from the + * parent superblock, including the network namespace. + */ + fc = fs_context_for_submount(&nfs_fs_type, path->dentry); + if (IS_ERR(fc)) + return ERR_CAST(fc); - mnt = server->nfs_client->rpc_ops->submount(server, path->dentry, fh, fattr); + ctx = nfs_fc2context(fc); + ctx->clone_data.dentry = path->dentry; + ctx->clone_data.sb = path->dentry->d_sb; + ctx->clone_data.fattr = nfs_alloc_fattr(); + if (!ctx->clone_data.fattr) + goto out_fc; + + if (fc->net_ns != client->cl_net) { + put_net(fc->net_ns); + fc->net_ns = get_net(client->cl_net); + } + + /* for submounts we want the same server; referrals will reassign */ + memcpy(&ctx->nfs_server.address, &client->cl_addr, client->cl_addrlen); + ctx->nfs_server.addrlen = client->cl_addrlen; + ctx->nfs_server.port = server->port; + + ctx->version = client->rpc_ops->version; + ctx->minorversion = client->cl_minorversion; + ctx->mount_info.nfs_mod = client->cl_nfs_mod; + __module_get(ctx->mount_info.nfs_mod->owner); + + ret = client->rpc_ops->submount(fc, server); + if (ret < 0) { + mnt = ERR_PTR(ret); + goto out_fc; + } + + up_write(&fc->root->d_sb->s_umount); + mnt = vfs_create_mount(fc); if (IS_ERR(mnt)) - goto out; + goto out_fc; if (nfs_mountpoint_expiry_timeout < 0) - goto out; + goto out_fc; mntget(mnt); /* prevent immediate expiration */ mnt_set_expiry(mnt, &nfs_automount_list); schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout); -out: - nfs_free_fattr(fattr); - nfs_free_fhandle(fh); +out_fc: + put_fs_context(fc); return mnt; } @@ -222,61 +253,62 @@ void nfs_release_automount_timer(void) * @authflavor: security flavor to use when performing the mount * */ -struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, - struct nfs_fattr *fattr, rpc_authflavor_t authflavor) +int nfs_do_submount(struct fs_context *fc) { - struct super_block *sb = dentry->d_sb; - struct nfs_clone_mount mountdata = { - .sb = sb, - .dentry = dentry, - .authflavor = authflavor, - }; - struct nfs_mount_info mount_info = { - .inherited_bsize = sb->s_blocksize_bits, - .cloned = &mountdata, - .mntfh = fh, - .nfs_mod = NFS_SB(sb)->nfs_client->cl_nfs_mod, - }; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry = ctx->clone_data.dentry; struct nfs_server *server; - struct vfsmount *mnt; - char *page = (char *) __get_free_page(GFP_USER); - char *devname; + char *buffer, *p; + int ret; - if (page == NULL) - return ERR_PTR(-ENOMEM); + /* create a new volume representation */ + server = ctx->mount_info.nfs_mod->rpc_ops->clone_server(NFS_SB(ctx->clone_data.sb), + ctx->mount_info.mntfh, + ctx->clone_data.fattr, + ctx->selected_flavor); - server = mount_info.nfs_mod->rpc_ops->clone_server(NFS_SB(sb), fh, - fattr, authflavor); if (IS_ERR(server)) - return ERR_CAST(server); + return PTR_ERR(server); - mount_info.server = server; + ctx->mount_info.server = server; - devname = nfs_devname(dentry, page, PAGE_SIZE); - if (IS_ERR(devname)) - mnt = ERR_CAST(devname); - else - mnt = vfs_submount(dentry, &nfs_prepared_fs_type, devname, &mount_info); + buffer = kmalloc(4096, GFP_USER); + if (!buffer) + return -ENOMEM; - if (mount_info.server) - nfs_free_server(mount_info.server); - free_page((unsigned long)page); - return mnt; + ctx->internal = true; + ctx->mount_info.inherited_bsize = ctx->clone_data.sb->s_blocksize_bits; + + p = nfs_devname(dentry, buffer, 4096); + if (IS_ERR(p)) { + dprintk("NFS: Couldn't determine submount pathname\n"); + ret = PTR_ERR(p); + } else { + ret = vfs_parse_fs_string(fc, "source", p, buffer + 4096 - p); + if (!ret) + ret = vfs_get_tree(fc); + } + kfree(buffer); + return ret; } EXPORT_SYMBOL_GPL(nfs_do_submount); -struct vfsmount *nfs_submount(struct nfs_server *server, struct dentry *dentry, - struct nfs_fh *fh, struct nfs_fattr *fattr) +int nfs_submount(struct fs_context *fc, struct nfs_server *server) { - int err; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry = ctx->clone_data.dentry; struct dentry *parent = dget_parent(dentry); + int err; /* Look it up again to get its attributes */ - err = server->nfs_client->rpc_ops->lookup(d_inode(parent), &dentry->d_name, fh, fattr, NULL); + err = server->nfs_client->rpc_ops->lookup(d_inode(parent), &dentry->d_name, + ctx->mount_info.mntfh, ctx->clone_data.fattr, + NULL); dput(parent); if (err != 0) - return ERR_PTR(err); + return err; - return nfs_do_submount(dentry, fh, fattr, server->client->cl_auth->au_flavor); + ctx->selected_flavor = server->client->cl_auth->au_flavor; + return nfs_do_submount(fc); } EXPORT_SYMBOL_GPL(nfs_submount); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 9eb2f1a503ab..657041c3a03f 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -990,7 +990,7 @@ const struct nfs_rpc_ops nfs_v3_clientops = { .nlmclnt_ops = &nlmclnt_fl_close_lock_ops, .getroot = nfs3_proc_get_root, .submount = nfs_submount, - .try_mount = nfs_try_mount, + .try_get_tree = nfs_try_get_tree, .getattr = nfs3_proc_getattr, .setattr = nfs3_proc_setattr, .lookup = nfs3_proc_lookup, diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 5d539dce9cef..9c136d53987d 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -268,14 +268,13 @@ extern const struct dentry_operations nfs4_dentry_operations; int nfs_atomic_open(struct inode *, struct dentry *, struct file *, unsigned, umode_t); -/* super.c */ +/* fs_context.c */ extern struct file_system_type nfs4_fs_type; /* nfs4namespace.c */ struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, const struct qstr *); -struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); +int nfs4_submount(struct fs_context *, struct nfs_server *); int nfs4_replace_transport(struct nfs_server *server, const struct nfs4_fs_locations *locations); @@ -526,7 +525,6 @@ extern const nfs4_stateid invalid_stateid; /* nfs4super.c */ struct nfs_mount_info; extern struct nfs_subversion nfs_v4; -struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *); extern bool nfs4_disable_idmapping; extern unsigned short max_session_slots; extern unsigned short max_session_cb_slots; @@ -536,6 +534,9 @@ extern bool recover_lost_locks; #define NFS4_CLIENT_ID_UNIQ_LEN (64) extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN]; +extern int nfs4_try_get_tree(struct fs_context *); +extern int nfs4_get_referral_tree(struct fs_context *); + /* nfs4sysctl.c */ #ifdef CONFIG_SYSCTL int nfs4_register_sysctl(void); diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 620de905cba9..be4eb720d5b6 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include "delegation.h" #include "internal.h" diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 2e460c33ae48..a1a0c4c53ce1 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -8,6 +8,7 @@ * NFSv4 namespace */ +#include #include #include #include @@ -21,37 +22,64 @@ #include #include "internal.h" #include "nfs4_fs.h" +#include "nfs.h" #include "dns_resolve.h" #define NFSDBG_FACILITY NFSDBG_VFS +/* + * Work out the length that an NFSv4 path would render to as a standard posix + * path, with a leading slash but no terminating slash. + */ +static ssize_t nfs4_pathname_len(const struct nfs4_pathname *pathname) +{ + ssize_t len = 0; + int i; + + for (i = 0; i < pathname->ncomponents; i++) { + const struct nfs4_string *component = &pathname->components[i]; + + if (component->len > NAME_MAX) + goto too_long; + len += 1 + component->len; /* Adding "/foo" */ + if (len > PATH_MAX) + goto too_long; + } + return len; + +too_long: + return -ENAMETOOLONG; +} + /* * Convert the NFSv4 pathname components into a standard posix path. - * - * Note that the resulting string will be placed at the end of the buffer */ -static inline char *nfs4_pathname_string(const struct nfs4_pathname *pathname, - char *buffer, ssize_t buflen) +static char *nfs4_pathname_string(const struct nfs4_pathname *pathname, + unsigned short *_len) { - char *end = buffer + buflen; - int n; + ssize_t len; + char *buf, *p; + int i; + + len = nfs4_pathname_len(pathname); + if (len < 0) + return ERR_PTR(len); + *_len = len; + + p = buf = kmalloc(len + 1, GFP_KERNEL); + if (!buf) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < pathname->ncomponents; i++) { + const struct nfs4_string *component = &pathname->components[i]; - *--end = '\0'; - buflen--; - - n = pathname->ncomponents; - while (--n >= 0) { - const struct nfs4_string *component = &pathname->components[n]; - buflen -= component->len + 1; - if (buflen < 0) - goto Elong; - end -= component->len; - memcpy(end, component->data, component->len); - *--end = '/'; + *p++ = '/'; + memcpy(p, component->data, component->len); + p += component->len; } - return end; -Elong: - return ERR_PTR(-ENAMETOOLONG); + + *p = 0; + return buf; } /* @@ -100,21 +128,32 @@ static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen) */ static int nfs4_validate_fspath(struct dentry *dentry, const struct nfs4_fs_locations *locations, - char *page, char *page2) + struct nfs_fs_context *ctx) { const char *path, *fs_path; + char *buf; + unsigned short len; + int n; - path = nfs4_path(dentry, page, PAGE_SIZE); - if (IS_ERR(path)) + buf = kmalloc(4096, GFP_KERNEL); + path = nfs4_path(dentry, buf, 4096); + if (IS_ERR(path)) { + kfree(buf); return PTR_ERR(path); + } - fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE); - if (IS_ERR(fs_path)) + fs_path = nfs4_pathname_string(&locations->fs_path, &len); + if (IS_ERR(fs_path)) { + kfree(buf); return PTR_ERR(fs_path); + } - if (strncmp(path, fs_path, strlen(fs_path)) != 0) { + n = strncmp(path, fs_path, len); + kfree(buf); + kfree(fs_path); + if (n != 0) { dprintk("%s: path %s does not begin with fsroot %s\n", - __func__, path, fs_path); + __func__, path, ctx->nfs_server.export_path); return -ENOENT; } @@ -236,55 +275,83 @@ out: return new; } -static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, - char *page, char *page2, - const struct nfs4_fs_location *location) +static int try_location(struct fs_context *fc, + const struct nfs4_fs_location *location) { const size_t addr_bufsize = sizeof(struct sockaddr_storage); - struct net *net = rpc_net_ns(NFS_SB(mountdata->sb)->client); - struct vfsmount *mnt = ERR_PTR(-ENOENT); - char *mnt_path; - unsigned int maxbuflen; - unsigned int s; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + unsigned int len, s; + char *export_path, *source, *p; + int ret = -ENOENT; + + /* Allocate a buffer big enough to hold any of the hostnames plus a + * terminating char and also a buffer big enough to hold the hostname + * plus a colon plus the path. + */ + len = 0; + for (s = 0; s < location->nservers; s++) { + const struct nfs4_string *buf = &location->servers[s]; + if (buf->len > len) + len = buf->len; + } - mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE); - if (IS_ERR(mnt_path)) - return ERR_CAST(mnt_path); - mountdata->mnt_path = mnt_path; - maxbuflen = mnt_path - 1 - page2; + kfree(ctx->nfs_server.hostname); + ctx->nfs_server.hostname = kmalloc(len + 1, GFP_KERNEL); + if (!ctx->nfs_server.hostname) + return -ENOMEM; - mountdata->addr = kmalloc(addr_bufsize, GFP_KERNEL); - if (mountdata->addr == NULL) - return ERR_PTR(-ENOMEM); + export_path = nfs4_pathname_string(&location->rootpath, + &ctx->nfs_server.export_path_len); + if (IS_ERR(export_path)) + return PTR_ERR(export_path); + ctx->nfs_server.export_path = export_path; + + source = kmalloc(len + 1 + ctx->nfs_server.export_path_len + 1, + GFP_KERNEL); + if (!source) + return -ENOMEM; + + kfree(fc->source); + fc->source = source; + + ctx->clone_data.addr = kmalloc(addr_bufsize, GFP_KERNEL); + if (ctx->clone_data.addr == NULL) + return -ENOMEM; for (s = 0; s < location->nservers; s++) { const struct nfs4_string *buf = &location->servers[s]; - if (buf->len <= 0 || buf->len >= maxbuflen) - continue; - if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len)) continue; - mountdata->addrlen = nfs_parse_server_name(buf->data, buf->len, - mountdata->addr, addr_bufsize, net); - if (mountdata->addrlen == 0) + ctx->clone_data.addrlen = + nfs_parse_server_name(buf->data, buf->len, + ctx->clone_data.addr, + addr_bufsize, + fc->net_ns); + if (ctx->clone_data.addrlen == 0) continue; - memcpy(page2, buf->data, buf->len); - page2[buf->len] = '\0'; - mountdata->hostname = page2; + rpc_set_port(ctx->clone_data.addr, NFS_PORT); - snprintf(page, PAGE_SIZE, "%s:%s", - mountdata->hostname, - mountdata->mnt_path); + memcpy(ctx->nfs_server.hostname, buf->data, buf->len); + ctx->nfs_server.hostname[buf->len] = '\0'; + ctx->clone_data.hostname = ctx->nfs_server.hostname; - mnt = vfs_submount(mountdata->dentry, &nfs4_referral_fs_type, page, mountdata); - if (!IS_ERR(mnt)) - break; + p = source; + memcpy(p, buf->data, buf->len); + p += buf->len; + *p++ = ':'; + memcpy(p, ctx->nfs_server.export_path, ctx->nfs_server.export_path_len); + p += ctx->nfs_server.export_path_len; + *p = 0; + + ret = nfs4_get_referral_tree(fc); + if (ret == 0) + return 0; } - kfree(mountdata->addr); - return mnt; + + return ret; } /** @@ -293,38 +360,23 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, * @locations: array of NFSv4 server location information * */ -static struct vfsmount *nfs_follow_referral(struct dentry *dentry, - const struct nfs4_fs_locations *locations) +static int nfs_follow_referral(struct fs_context *fc, + const struct nfs4_fs_locations *locations) { - struct vfsmount *mnt = ERR_PTR(-ENOENT); - struct nfs_clone_mount mountdata = { - .sb = dentry->d_sb, - .dentry = dentry, - .authflavor = NFS_SB(dentry->d_sb)->client->cl_auth->au_flavor, - }; - char *page = NULL, *page2 = NULL; + struct nfs_fs_context *ctx = nfs_fc2context(fc); int loc, error; if (locations == NULL || locations->nlocations <= 0) - goto out; - - dprintk("%s: referral at %pd2\n", __func__, dentry); - - page = (char *) __get_free_page(GFP_USER); - if (!page) - goto out; + return -ENOENT; - page2 = (char *) __get_free_page(GFP_USER); - if (!page2) - goto out; + dprintk("%s: referral at %pd2\n", __func__, ctx->clone_data.dentry); /* Ensure fs path is a prefix of current dentry path */ - error = nfs4_validate_fspath(dentry, locations, page, page2); - if (error < 0) { - mnt = ERR_PTR(error); - goto out; - } + error = nfs4_validate_fspath(ctx->clone_data.dentry, locations, ctx); + if (error < 0) + return error; + error = -ENOENT; for (loc = 0; loc < locations->nlocations; loc++) { const struct nfs4_fs_location *location = &locations->locations[loc]; @@ -332,15 +384,12 @@ static struct vfsmount *nfs_follow_referral(struct dentry *dentry, location->rootpath.ncomponents == 0) continue; - mnt = try_location(&mountdata, page, page2, location); - if (!IS_ERR(mnt)) - break; + error = try_location(fc, location); + if (error == 0) + return 0; } -out: - free_page((unsigned long) page); - free_page((unsigned long) page2); - return mnt; + return error; } /* @@ -348,71 +397,73 @@ out: * @dentry - dentry of referral * */ -static struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry) +static int nfs_do_refmount(struct fs_context *fc, struct rpc_clnt *client) { - struct vfsmount *mnt = ERR_PTR(-ENOMEM); - struct dentry *parent; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry, *parent; struct nfs4_fs_locations *fs_locations = NULL; struct page *page; - int err; + int err = -ENOMEM; /* BUG_ON(IS_ROOT(dentry)); */ page = alloc_page(GFP_KERNEL); - if (page == NULL) - return mnt; + if (!page) + return -ENOMEM; fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); - if (fs_locations == NULL) + if (!fs_locations) goto out_free; /* Get locations */ - mnt = ERR_PTR(-ENOENT); - + dentry = ctx->clone_data.dentry; parent = dget_parent(dentry); dprintk("%s: getting locations for %pd2\n", __func__, dentry); err = nfs4_proc_fs_locations(client, d_inode(parent), &dentry->d_name, fs_locations, page); dput(parent); - if (err != 0 || - fs_locations->nlocations <= 0 || + if (err != 0) + goto out_free_2; + + err = -ENOENT; + if (fs_locations->nlocations <= 0 || fs_locations->fs_path.ncomponents <= 0) - goto out_free; + goto out_free_2; - mnt = nfs_follow_referral(dentry, fs_locations); + err = nfs_follow_referral(fc, fs_locations); +out_free_2: + kfree(fs_locations); out_free: __free_page(page); - kfree(fs_locations); - return mnt; + return err; } -struct vfsmount *nfs4_submount(struct nfs_server *server, struct dentry *dentry, - struct nfs_fh *fh, struct nfs_fattr *fattr) +int nfs4_submount(struct fs_context *fc, struct nfs_server *server) { - rpc_authflavor_t flavor = server->client->cl_auth->au_flavor; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct dentry *dentry = ctx->clone_data.dentry; struct dentry *parent = dget_parent(dentry); struct inode *dir = d_inode(parent); const struct qstr *name = &dentry->d_name; struct rpc_clnt *client; - struct vfsmount *mnt; + int ret; /* Look it up again to get its attributes and sec flavor */ - client = nfs4_proc_lookup_mountpoint(dir, name, fh, fattr); + client = nfs4_proc_lookup_mountpoint(dir, name, ctx->mount_info.mntfh, + ctx->clone_data.fattr); dput(parent); if (IS_ERR(client)) - return ERR_CAST(client); + return PTR_ERR(client); - if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { - mnt = nfs_do_refmount(client, dentry); - goto out; + ctx->selected_flavor = client->cl_auth->au_flavor; + if (ctx->clone_data.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { + ret = nfs_do_refmount(fc, client); + } else { + ret = nfs_do_submount(fc); } - if (client->cl_auth->au_flavor != flavor) - flavor = client->cl_auth->au_flavor; - mnt = nfs_do_submount(dentry, fh, fattr, flavor); -out: rpc_shutdown_client(client); - return mnt; + return ret; } /* diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 76d37161409a..5f51f62b0652 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -10001,7 +10001,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = { .file_ops = &nfs4_file_operations, .getroot = nfs4_proc_get_root, .submount = nfs4_submount, - .try_mount = nfs4_try_mount, + .try_get_tree = nfs4_try_get_tree, .getattr = nfs4_proc_getattr, .setattr = nfs4_proc_setattr, .lookup = nfs4_proc_lookup, diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index f931e8f49b05..469726410c5c 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -4,6 +4,7 @@ */ #include #include +#include #include #include #include "delegation.h" @@ -18,16 +19,6 @@ static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc); static void nfs4_evict_inode(struct inode *inode); -static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); - -struct file_system_type nfs4_referral_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_referral_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; static const struct super_operations nfs4_sops = { .alloc_inode = nfs_alloc_inode, @@ -41,7 +32,6 @@ static const struct super_operations nfs4_sops = { .show_devname = nfs_show_devname, .show_path = nfs_show_path, .show_stats = nfs_show_stats, - .remount_fs = nfs_remount, }; struct nfs_subversion nfs_v4 = { @@ -147,102 +137,121 @@ static void nfs_referral_loop_unprotect(void) kfree(p); } -static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags, - struct nfs_mount_info *info, - const char *hostname, - const char *export_path) +static int do_nfs4_mount(struct nfs_server *server, + struct fs_context *fc, + const char *hostname, + const char *export_path) { + struct nfs_fs_context *root_ctx; + struct fs_context *root_fc; struct vfsmount *root_mnt; struct dentry *dentry; - char *root_devname; - int err; size_t len; + int ret; + + struct fs_parameter param = { + .key = "source", + .type = fs_value_is_string, + .dirfd = -1, + }; if (IS_ERR(server)) - return ERR_CAST(server); + return PTR_ERR(server); - len = strlen(hostname) + 5; - root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) { + root_fc = vfs_dup_fs_context(fc); + if (IS_ERR(root_fc)) { nfs_free_server(server); - return ERR_PTR(-ENOMEM); + return PTR_ERR(root_fc); + } + kfree(root_fc->source); + root_fc->source = NULL; + + root_ctx = nfs_fc2context(root_fc); + root_ctx->internal = true; + root_ctx->mount_info.server = server; + /* We leave export_path unset as it's not used to find the root. */ + + len = strlen(hostname) + 5; + param.string = kmalloc(len, GFP_KERNEL); + if (param.string == NULL) { + put_fs_context(root_fc); + return -ENOMEM; } /* Does hostname needs to be enclosed in brackets? */ if (strchr(hostname, ':')) - snprintf(root_devname, len, "[%s]:/", hostname); + param.size = snprintf(param.string, len, "[%s]:/", hostname); else - snprintf(root_devname, len, "%s:/", hostname); - info->server = server; - root_mnt = vfs_kern_mount(&nfs_prepared_fs_type, flags, root_devname, info); - if (info->server) - nfs_free_server(info->server); - info->server = NULL; - kfree(root_devname); + param.size = snprintf(param.string, len, "%s:/", hostname); + ret = vfs_parse_fs_param(root_fc, ¶m); + kfree(param.string); + if (ret < 0) { + put_fs_context(root_fc); + return ret; + } + root_mnt = fc_mount(root_fc); + put_fs_context(root_fc); if (IS_ERR(root_mnt)) - return ERR_CAST(root_mnt); + return PTR_ERR(root_mnt); - err = nfs_referral_loop_protect(); - if (err) { + ret = nfs_referral_loop_protect(); + if (ret) { mntput(root_mnt); - return ERR_PTR(err); + return ret; } dentry = mount_subtree(root_mnt, export_path); nfs_referral_loop_unprotect(); - return dentry; + if (IS_ERR(dentry)) + return PTR_ERR(dentry); + + fc->root = dentry; + return 0; } -struct dentry *nfs4_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info) +int nfs4_try_get_tree(struct fs_context *fc) { - struct nfs_fs_context *ctx = mount_info->ctx; - struct dentry *res; - - dfprintk(MOUNT, "--> nfs4_try_mount()\n"); + struct nfs_fs_context *ctx = nfs_fc2context(fc); + int err; - res = do_nfs4_mount(nfs4_create_server(mount_info), - flags, mount_info, - ctx->nfs_server.hostname, - ctx->nfs_server.export_path); + dfprintk(MOUNT, "--> nfs4_try_get_tree()\n"); - dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", - PTR_ERR_OR_ZERO(res), - IS_ERR(res) ? " [error]" : ""); - return res; + /* We create a mount for the server's root, walk to the requested + * location and then create another mount for that. + */ + err= do_nfs4_mount(nfs4_create_server(&ctx->mount_info), + fc, ctx->nfs_server.hostname, + ctx->nfs_server.export_path); + if (err) { + dfprintk(MOUNT, "<-- nfs4_try_get_tree() = %d [error]\n", err); + } else { + dfprintk(MOUNT, "<-- nfs4_try_get_tree() = 0\n"); + } + return err; } /* * Create an NFS4 server record on referral traversal */ -static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) +int nfs4_get_referral_tree(struct fs_context *fc) { - struct nfs_clone_mount *data = raw_data; - struct nfs_mount_info mount_info = { - .cloned = data, - .nfs_mod = &nfs_v4, - }; - struct dentry *res; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + int err; dprintk("--> nfs4_referral_mount()\n"); - mount_info.mntfh = nfs_alloc_fhandle(); - if (!mount_info.mntfh) - return ERR_PTR(-ENOMEM); - - res = do_nfs4_mount(nfs4_create_referral_server(mount_info.cloned, - mount_info.mntfh), - flags, &mount_info, data->hostname, data->mnt_path); - - dprintk("<-- nfs4_referral_mount() = %d%s\n", - PTR_ERR_OR_ZERO(res), - IS_ERR(res) ? " [error]" : ""); - - nfs_free_fhandle(mount_info.mntfh); - return res; + /* create a new volume representation */ + err = do_nfs4_mount(nfs4_create_referral_server(&ctx->clone_data, ctx->mount_info.mntfh), + fc, ctx->nfs_server.hostname, + ctx->nfs_server.export_path); + if (err) { + dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = %d [error]\n", err); + } else { + dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = 0\n"); + } + return err; } diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 0f7288b94633..44a15523bf40 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -710,7 +710,7 @@ const struct nfs_rpc_ops nfs_v2_clientops = { .file_ops = &nfs_file_operations, .getroot = nfs_proc_get_root, .submount = nfs_submount, - .try_mount = nfs_try_mount, + .try_get_tree = nfs_try_get_tree, .getattr = nfs_proc_getattr, .setattr = nfs_proc_setattr, .lookup = nfs_proc_lookup, diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 6c9573a32a69..6ff99da978a8 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -70,28 +70,6 @@ #define NFSDBG_FACILITY NFSDBG_VFS -static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); - -struct file_system_type nfs_fs_type = { - .owner = THIS_MODULE, - .name = "nfs", - .mount = nfs_fs_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; -MODULE_ALIAS_FS("nfs"); -EXPORT_SYMBOL_GPL(nfs_fs_type); - -struct file_system_type nfs_prepared_fs_type = { - .owner = THIS_MODULE, - .name = "nfs", - .mount = nfs_prepared_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; -EXPORT_SYMBOL_GPL(nfs_prepared_fs_type); - const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, .free_inode = nfs_free_inode, @@ -104,22 +82,10 @@ const struct super_operations nfs_sops = { .show_devname = nfs_show_devname, .show_path = nfs_show_path, .show_stats = nfs_show_stats, - .remount_fs = nfs_remount, }; EXPORT_SYMBOL_GPL(nfs_sops); #if IS_ENABLED(CONFIG_NFS_V4) -struct file_system_type nfs4_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs_fs_mount, - .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, -}; -MODULE_ALIAS_FS("nfs4"); -MODULE_ALIAS("nfs4"); -EXPORT_SYMBOL_GPL(nfs4_fs_type); - static int __init register_nfs4_fs(void) { return register_filesystem(&nfs4_fs_type); @@ -911,20 +877,19 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf return nfs_mod->rpc_ops->create_server(mount_info); } -static struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *); - -struct dentry *nfs_try_mount(int flags, const char *dev_name, - struct nfs_mount_info *mount_info) +int nfs_try_get_tree(struct fs_context *fc) { - struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - if (mount_info->ctx->need_mount) - mount_info->server = nfs_try_mount_request(mount_info); + struct nfs_fs_context *ctx = nfs_fc2context(fc); + + if (ctx->need_mount) + ctx->mount_info.server = nfs_try_mount_request(&ctx->mount_info); else - mount_info->server = nfs_mod->rpc_ops->create_server(mount_info); + ctx->mount_info.server = ctx->mount_info.nfs_mod->rpc_ops->create_server(&ctx->mount_info); - return nfs_fs_mount_common(flags, dev_name, mount_info); + return nfs_get_tree_common(fc); } -EXPORT_SYMBOL_GPL(nfs_try_mount); +EXPORT_SYMBOL_GPL(nfs_try_get_tree); + #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ | NFS_MOUNT_SECURE \ @@ -965,15 +930,11 @@ nfs_compare_remount_data(struct nfs_server *nfss, return 0; } -int -nfs_remount(struct super_block *sb, int *flags, char *raw_data) +int nfs_reconfigure(struct fs_context *fc) { - int error; + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct super_block *sb = fc->root->d_sb; struct nfs_server *nfss = sb->s_fs_info; - struct nfs_fs_context *ctx; - struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; - struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; - u32 nfsvers = nfss->nfs_client->rpc_ops->version; sync_filesystem(sb); @@ -983,57 +944,24 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) * ones were explicitly specified. Fall back to legacy behavior and * just return success. */ - if ((nfsvers == 4 && (!options4 || options4->version == 1)) || - (nfsvers <= 3 && (!options || (options->version >= 1 && - options->version <= 6)))) + if (ctx->skip_reconfig_option_check) return 0; - ctx = nfs_alloc_parsed_mount_data(); - if (ctx == NULL) - return -ENOMEM; - - /* fill out struct with values from existing mount */ - ctx->flags = nfss->flags; - ctx->rsize = nfss->rsize; - ctx->wsize = nfss->wsize; - ctx->retrans = nfss->client->cl_timeout->to_retries; - ctx->selected_flavor = nfss->client->cl_auth->au_flavor; - ctx->acregmin = nfss->acregmin / HZ; - ctx->acregmax = nfss->acregmax / HZ; - ctx->acdirmin = nfss->acdirmin / HZ; - ctx->acdirmax = nfss->acdirmax / HZ; - ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; - ctx->nfs_server.port = nfss->port; - ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; - ctx->version = nfsvers; - ctx->minorversion = nfss->nfs_client->cl_minorversion; - ctx->net = current->nsproxy->net_ns; - memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, - ctx->nfs_server.addrlen); - - /* overwrite those values with any that were specified */ - error = -EINVAL; - if (!nfs_parse_mount_options((char *)options, ctx)) - goto out; - /* * noac is a special case. It implies -o sync, but that's not - * necessarily reflected in the mtab options. do_remount_sb + * necessarily reflected in the mtab options. reconfigure_super * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the * remount options, so we have to explicitly reset it. */ - if (ctx->flags & NFS_MOUNT_NOAC) - *flags |= SB_SYNCHRONOUS; + if (ctx->flags & NFS_MOUNT_NOAC) { + fc->sb_flags |= SB_SYNCHRONOUS; + fc->sb_flags_mask |= SB_SYNCHRONOUS; + } /* compare new mount options with old ones */ - error = nfs_compare_remount_data(nfss, ctx); - if (!error) - error = security_sb_remount(sb, ctx->lsm_opts); -out: - nfs_free_parsed_mount_data(ctx); - return error; + return nfs_compare_remount_data(nfss, ctx); } -EXPORT_SYMBOL_GPL(nfs_remount); +EXPORT_SYMBOL_GPL(nfs_reconfigure); /* * Finish setting up an NFS superblock @@ -1112,19 +1040,11 @@ Ebusy: return 0; } -struct nfs_sb_mountdata { - struct nfs_server *server; - int mntflags; -}; - -static int nfs_set_super(struct super_block *s, void *data) +static int nfs_set_super(struct super_block *s, struct fs_context *fc) { - struct nfs_sb_mountdata *sb_mntdata = data; - struct nfs_server *server = sb_mntdata->server; + struct nfs_server *server = fc->s_fs_info; int ret; - s->s_flags = sb_mntdata->mntflags; - s->s_fs_info = server; s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; ret = set_anon_super(s, server); if (ret == 0) @@ -1189,11 +1109,9 @@ static int nfs_compare_userns(const struct nfs_server *old, return 1; } -static int nfs_compare_super(struct super_block *sb, void *data) +static int nfs_compare_super(struct super_block *sb, struct fs_context *fc) { - struct nfs_sb_mountdata *sb_mntdata = data; - struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); - int mntflags = sb_mntdata->mntflags; + struct nfs_server *server = fc->s_fs_info, *old = NFS_SB(sb); if (!nfs_compare_super_address(old, server)) return 0; @@ -1204,13 +1122,12 @@ static int nfs_compare_super(struct super_block *sb, void *data) return 0; if (!nfs_compare_userns(old, server)) return 0; - return nfs_compare_mount_options(sb, server, mntflags); + return nfs_compare_mount_options(sb, server, fc->sb_flags); } #ifdef CONFIG_NFS_FSCACHE static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_fs_context *ctx, - struct nfs_clone_mount *cloned) + struct nfs_fs_context *ctx) { struct nfs_server *nfss = NFS_SB(sb); char *uniq = NULL; @@ -1219,30 +1136,32 @@ static void nfs_get_cache_cookie(struct super_block *sb, nfss->fscache_key = NULL; nfss->fscache = NULL; - if (ctx) { - if (!(ctx->options & NFS_OPTION_FSCACHE)) - return; - if (ctx->fscache_uniq) { - uniq = ctx->fscache_uniq; - ulen = strlen(ctx->fscache_uniq); - } - } else if (cloned) { - struct nfs_server *mnt_s = NFS_SB(cloned->sb); + if (!ctx) + return; + + if (ctx->clone_data.sb) { + struct nfs_server *mnt_s = NFS_SB(ctx->clone_data.sb); if (!(mnt_s->options & NFS_OPTION_FSCACHE)) return; if (mnt_s->fscache_key) { uniq = mnt_s->fscache_key->key.uniquifier; ulen = mnt_s->fscache_key->key.uniq_len; } - } else + } else { + if (!(ctx->options & NFS_OPTION_FSCACHE)) + return; + if (ctx->fscache_uniq) { + uniq = ctx->fscache_uniq; + ulen = strlen(ctx->fscache_uniq); + } return; + } nfs_fscache_get_super_cookie(sb, uniq, ulen); } #else static void nfs_get_cache_cookie(struct super_block *sb, - struct nfs_fs_context *parsed, - struct nfs_clone_mount *cloned) + struct nfs_fs_context *ctx) { } #endif @@ -1254,40 +1173,41 @@ static void nfs_set_readahead(struct backing_dev_info *bdi, bdi->io_pages = iomax_pages; } -static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, - struct nfs_mount_info *mount_info) +int nfs_get_tree_common(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct super_block *s; struct dentry *mntroot = ERR_PTR(-ENOMEM); - int (*compare_super)(struct super_block *, void *) = nfs_compare_super; - struct nfs_server *server = mount_info->server; + int (*compare_super)(struct super_block *, struct fs_context *) = nfs_compare_super; + struct nfs_server *server = ctx->mount_info.server; unsigned long kflags = 0, kflags_out = 0; - struct nfs_sb_mountdata sb_mntdata = { - .mntflags = flags, - .server = server, - }; int error; - mount_info->server = NULL; + ctx->mount_info.server = NULL; if (IS_ERR(server)) - return ERR_CAST(server); + return PTR_ERR(server); if (server->flags & NFS_MOUNT_UNSHARED) compare_super = NULL; /* -o noac implies -o sync */ if (server->flags & NFS_MOUNT_NOAC) - sb_mntdata.mntflags |= SB_SYNCHRONOUS; + fc->sb_flags |= SB_SYNCHRONOUS; + + if (ctx->clone_data.sb) + if (ctx->clone_data.sb->s_flags & SB_SYNCHRONOUS) + fc->sb_flags |= SB_SYNCHRONOUS; - if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL) - if (mount_info->cloned->sb->s_flags & SB_SYNCHRONOUS) - sb_mntdata.mntflags |= SB_SYNCHRONOUS; + if (server->caps & NFS_CAP_SECURITY_LABEL) + fc->lsm_flags |= SECURITY_LSM_NATIVE_LABELS; /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(mount_info->nfs_mod->nfs_fs, compare_super, nfs_set_super, - flags, &sb_mntdata); + fc->s_fs_info = server; + s = sget_fc(fc, compare_super, nfs_set_super); + fc->s_fs_info = NULL; if (IS_ERR(s)) { - mntroot = ERR_CAST(s); + error = PTR_ERR(s); + dfprintk(MOUNT, "NFS: Couldn't get superblock\n"); goto out_err_nosb; } @@ -1297,44 +1217,43 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, } else { error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), MINOR(server->s_dev)); - if (error) { - mntroot = ERR_PTR(error); + if (error) goto error_splat_super; - } nfs_set_readahead(s->s_bdi, server->rpages); server->super = s; } if (!s->s_root) { - unsigned bsize = mount_info->inherited_bsize; + unsigned bsize = ctx->mount_info.inherited_bsize; /* initial superblock/root creation */ - nfs_fill_super(s, mount_info); + nfs_fill_super(s, &ctx->mount_info); if (bsize) { s->s_blocksize_bits = bsize; s->s_blocksize = 1U << bsize; } - nfs_get_cache_cookie(s, mount_info->ctx, mount_info->cloned); - if (!(server->flags & NFS_MOUNT_UNSHARED)) - s->s_iflags |= SB_I_MULTIROOT; + nfs_get_cache_cookie(s, ctx); } - mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); - if (IS_ERR(mntroot)) + mntroot = nfs_get_root(s, ctx->mount_info.mntfh, fc->source); + if (IS_ERR(mntroot)) { + error = PTR_ERR(mntroot); + dfprintk(MOUNT, "NFS: Couldn't get root dentry\n"); goto error_splat_super; - + } + fc->root = mntroot; if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) kflags |= SECURITY_LSM_NATIVE_LABELS; - if (mount_info->cloned) { - if (d_inode(mntroot)->i_fop != &nfs_dir_operations) { + if (ctx->clone_data.sb) { + if (d_inode(fc->root)->i_fop != &nfs_dir_operations) { error = -ESTALE; goto error_splat_root; } /* clone any lsm security options from the parent to the new sb */ - error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, + error = security_sb_clone_mnt_opts(ctx->clone_data.sb, s, kflags, &kflags_out); } else { - error = security_sb_set_mnt_opts(s, mount_info->ctx->lsm_opts, + error = security_sb_set_mnt_opts(s, fc->security, kflags, &kflags_out); } if (error) @@ -1342,67 +1261,25 @@ static struct dentry *nfs_fs_mount_common(int flags, const char *dev_name, if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; - if (error) - goto error_splat_root; s->s_flags |= SB_ACTIVE; + error = 0; out: - return mntroot; + return error; out_err_nosb: nfs_free_server(server); goto out; error_splat_root: - dput(mntroot); - mntroot = ERR_PTR(error); + dput(fc->root); + fc->root = NULL; error_splat_super: deactivate_locked_super(s); goto out; } -struct dentry *nfs_fs_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - struct nfs_mount_info mount_info = { - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - struct nfs_subversion *nfs_mod; - int error; - - mount_info.ctx = nfs_alloc_parsed_mount_data(); - mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.ctx == NULL || mount_info.mntfh == NULL) - goto out; - - /* Validate the mount data */ - error = nfs_validate_mount_data(fs_type, raw_data, mount_info.ctx, mount_info.mntfh, dev_name); - if (error == NFS_TEXT_DATA) - error = nfs_validate_text_mount_data(raw_data, - mount_info.ctx, dev_name); - if (error < 0) { - mntroot = ERR_PTR(error); - goto out; - } - - nfs_mod = get_nfs_version(mount_info.ctx->version); - if (IS_ERR(nfs_mod)) { - mntroot = ERR_CAST(nfs_mod); - goto out; - } - mount_info.nfs_mod = nfs_mod; - - mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info); - - put_nfs_version(nfs_mod); -out: - nfs_free_parsed_mount_data(mount_info.ctx); - nfs_free_fhandle(mount_info.mntfh); - return mntroot; -} -EXPORT_SYMBOL_GPL(nfs_fs_mount); - /* * Destroy an NFS2/3 superblock */ @@ -1420,17 +1297,6 @@ void nfs_kill_super(struct super_block *s) } EXPORT_SYMBOL_GPL(nfs_kill_super); -/* - * Internal use only: mount_info is already set up by caller. - * Used for mountpoint crossings and for nfs4 root. - */ -static struct dentry * -nfs_prepared_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - return nfs_fs_mount_common(flags, dev_name, raw_data); -} - #if IS_ENABLED(CONFIG_NFS_V4) /* diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 17527f6e6360..574741d5418d 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1639,6 +1639,7 @@ struct nfs_subversion; struct nfs_mount_info; struct nfs_client_initdata; struct nfs_pageio_descriptor; +struct fs_context; /* * RPC procedure vector for NFSv2/NFSv3 demuxing @@ -1653,9 +1654,8 @@ struct nfs_rpc_ops { int (*getroot) (struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); - struct vfsmount *(*submount) (struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); - struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *); + int (*submount) (struct fs_context *, struct nfs_server *); + int (*try_get_tree) (struct fs_context *); int (*getattr) (struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *, struct inode *); -- cgit v1.2.3-59-g8ed1b From 62a55d088cd87d480a6fd67b0d63b14ccae80838 Mon Sep 17 00:00:00 2001 From: Scott Mayhew Date: Tue, 10 Dec 2019 07:31:14 -0500 Subject: NFS: Additional refactoring for fs_context conversion Split out from commit "NFS: Add fs_context support." This patch adds additional refactoring for the conversion of NFS to use fs_context, namely: (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context. nfs_clone_mount has had several fields removed, and nfs_mount_info has been removed altogether. (*) Various functions now take an fs_context as an argument instead of nfs_mount_info, nfs_fs_context, etc. Signed-off-by: Scott Mayhew Signed-off-by: Anna Schumaker --- fs/nfs/client.c | 22 +++---- fs/nfs/fs_context.c | 155 +++++++++++++++++------------------------------- fs/nfs/fscache.c | 2 +- fs/nfs/getroot.c | 70 +++++++++++----------- fs/nfs/internal.h | 53 +++++------------ fs/nfs/namespace.c | 14 ++--- fs/nfs/nfs3_fs.h | 2 +- fs/nfs/nfs3client.c | 5 +- fs/nfs/nfs4client.c | 62 +++++++++---------- fs/nfs/nfs4namespace.c | 23 +++---- fs/nfs/nfs4super.c | 19 +++--- fs/nfs/super.c | 48 +++++++-------- include/linux/nfs_xdr.h | 2 +- 13 files changed, 204 insertions(+), 273 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 69c0708b2acc..8f760f23748c 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -658,17 +658,17 @@ EXPORT_SYMBOL_GPL(nfs_init_client); * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_fs_context *ctx, - struct nfs_subversion *nfs_mod) + const struct fs_context *fc) { + const struct nfs_fs_context *ctx = nfs_fc2context(fc); struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { .hostname = ctx->nfs_server.hostname, .addr = (const struct sockaddr *)&ctx->nfs_server.address, .addrlen = ctx->nfs_server.addrlen, - .nfs_mod = nfs_mod, + .nfs_mod = ctx->nfs_mod, .proto = ctx->nfs_server.protocol, - .net = ctx->net, + .net = fc->net_ns, .timeparms = &timeparms, .cred = server->cred, .nconnect = ctx->nfs_server.nconnect, @@ -951,10 +951,10 @@ EXPORT_SYMBOL_GPL(nfs_free_server); * Create a version 2 or 3 volume record * - keyed on server and FSID */ -struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) +struct nfs_server *nfs_create_server(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_server *server; - struct nfs_subversion *nfs_mod = mount_info->nfs_mod; struct nfs_fattr *fattr; int error; @@ -970,18 +970,18 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) goto error; /* Get a client representation */ - error = nfs_init_server(server, mount_info->ctx, nfs_mod); + error = nfs_init_server(server, fc); if (error < 0) goto error; /* Probe the root fh to retrieve its FSID */ - error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); + error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); if (error < 0) goto error; if (server->nfs_client->rpc_ops->version == 3) { if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) server->namelen = NFS3_MAXNAMLEN; - if (!(mount_info->ctx->flags & NFS_MOUNT_NORDIRPLUS)) + if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) server->caps |= NFS_CAP_READDIRPLUS; } else { if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) @@ -989,8 +989,8 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info) } if (!(fattr->valid & NFS_ATTR_FATTR)) { - error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, - fattr, NULL, NULL); + error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, + fattr, NULL, NULL); if (error < 0) { dprintk("nfs_create_server: getattr error = %d\n", -error); goto error; diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index ac1a8d7d7393..e472334b978d 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -241,43 +241,6 @@ static const struct constant_table nfs_secflavor_tokens[] = { { "sys", Opt_sec_sys }, }; -struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) -{ - struct nfs_fs_context *ctx; - - ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); - if (ctx) { - ctx->timeo = NFS_UNSPEC_TIMEO; - ctx->retrans = NFS_UNSPEC_RETRANS; - ctx->acregmin = NFS_DEF_ACREGMIN; - ctx->acregmax = NFS_DEF_ACREGMAX; - ctx->acdirmin = NFS_DEF_ACDIRMIN; - ctx->acdirmax = NFS_DEF_ACDIRMAX; - ctx->mount_server.port = NFS_UNSPEC_PORT; - ctx->nfs_server.port = NFS_UNSPEC_PORT; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; - ctx->minorversion = 0; - ctx->need_mount = true; - ctx->net = current->nsproxy->net_ns; - ctx->lsm_opts = NULL; - } - return ctx; -} - -void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx) -{ - if (ctx) { - kfree(ctx->client_address); - kfree(ctx->mount_server.hostname); - kfree(ctx->nfs_server.export_path); - kfree(ctx->nfs_server.hostname); - kfree(ctx->fscache_uniq); - security_free_mnt_opts(&ctx->lsm_opts); - kfree(ctx); - } -} - /* * Sanity-check a server address provided by the mount command. * @@ -342,7 +305,7 @@ static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) * Add 'flavor' to 'auth_info' if not already present. * Returns true if 'flavor' ends up in the list, false otherwise */ -static int nfs_auth_info_add(struct nfs_fs_context *ctx, +static int nfs_auth_info_add(struct fs_context *fc, struct nfs_auth_info *auth_info, rpc_authflavor_t flavor) { @@ -367,9 +330,10 @@ static int nfs_auth_info_add(struct nfs_fs_context *ctx, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, +static int nfs_parse_security_flavors(struct fs_context *fc, struct fs_parameter *param) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); rpc_authflavor_t pseudoflavor; char *string = param->string, *p; int ret; @@ -419,7 +383,7 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, return -EINVAL; } - ret = nfs_auth_info_add(ctx, &ctx->auth_info, pseudoflavor); + ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); if (ret < 0) return ret; } @@ -427,9 +391,11 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, return 0; } -static int nfs_parse_version_string(struct nfs_fs_context *ctx, +static int nfs_parse_version_string(struct fs_context *fc, const char *string) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); + ctx->flags &= ~NFS_MOUNT_VER3; switch (lookup_constant(nfs_vers_tokens, string, -1)) { case Opt_vers_2: @@ -656,17 +622,17 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, * options that take text values */ case Opt_v: - ret = nfs_parse_version_string(ctx, param->key + 1); + ret = nfs_parse_version_string(fc, param->key + 1); if (ret < 0) return ret; break; case Opt_vers: - ret = nfs_parse_version_string(ctx, param->string); + ret = nfs_parse_version_string(fc, param->string); if (ret < 0) return ret; break; case Opt_sec: - ret = nfs_parse_security_flavors(ctx, param); + ret = nfs_parse_security_flavors(fc, param); if (ret < 0) return ret; break; @@ -729,7 +695,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, break; case Opt_addr: - len = rpc_pton(ctx->net, param->string, param->size, + len = rpc_pton(fc->net_ns, param->string, param->size, &ctx->nfs_server.address, sizeof(ctx->nfs_server._address)); if (len == 0) @@ -747,7 +713,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, param->string = NULL; break; case Opt_mountaddr: - len = rpc_pton(ctx->net, param->string, param->size, + len = rpc_pton(fc->net_ns, param->string, param->size, &ctx->mount_server.address, sizeof(ctx->mount_server._address)); if (len == 0) @@ -819,7 +785,7 @@ out_of_bounds: } /* - * Split "dev_name" into "hostname:export_path". + * Split fc->source into "hostname:export_path". * * The leftmost colon demarks the split between the server's hostname * and the export path. If the hostname starts with a left square @@ -827,12 +793,13 @@ out_of_bounds: * * Note: caller frees hostname and export path, even on error. */ -static int nfs_parse_devname(struct nfs_fs_context *ctx, - const char *dev_name, - size_t maxnamlen, size_t maxpathlen) +static int nfs_parse_source(struct fs_context *fc, + size_t maxnamlen, size_t maxpathlen) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); + const char *dev_name = fc->source; size_t len; - char *end; + const char *end; if (unlikely(!dev_name || !*dev_name)) { dfprintk(MOUNT, "NFS: device name not specified\n"); @@ -848,7 +815,7 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, len = end - dev_name; end++; } else { - char *comma; + const char *comma; end = strchr(dev_name, ':'); if (end == NULL) @@ -856,8 +823,8 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, len = end - dev_name; /* kill possible hostname list: not supported */ - comma = strchr(dev_name, ','); - if (comma != NULL && comma < end) + comma = memchr(dev_name, ',', len); + if (comma) len = comma - dev_name; } @@ -920,7 +887,7 @@ static int nfs23_parse_monolithic(struct fs_context *fc, struct nfs_mount_data *data) { struct nfs_fs_context *ctx = nfs_fc2context(fc); - struct nfs_fh *mntfh = ctx->mount_info.mntfh; + struct nfs_fh *mntfh = ctx->mntfh; struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; @@ -1009,6 +976,7 @@ static int nfs23_parse_monolithic(struct fs_context *fc, else ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); + /* * The legacy version 6 binary mount data from userspace has a * field used only to transport selinux information into the @@ -1073,12 +1041,6 @@ out_invalid_fh: } #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx) -{ - ctx->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| - NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); -} - /* * Validate NFSv4 mount options */ @@ -1251,20 +1213,22 @@ static int nfs_fs_context_validate(struct fs_context *fc) goto out_no_address; if (ctx->version == 4) { -#if IS_ENABLED(CONFIG_NFS_V4) - if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - else - port = NFS_PORT; - max_namelen = NFS4_MAXNAMLEN; - max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(ctx); - if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - nfs4_validate_mount_flags(ctx); -#else - goto out_v4_not_compiled; -#endif /* CONFIG_NFS_V4 */ + if (IS_ENABLED(CONFIG_NFS_V4)) { + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + else + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL | + NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + } else { + goto out_v4_not_compiled; + } } else { nfs_set_mount_transport_protocol(ctx); if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) @@ -1273,33 +1237,30 @@ static int nfs_fs_context_validate(struct fs_context *fc) nfs_set_port(sap, &ctx->nfs_server.port, port); - ret = nfs_parse_devname(ctx, fc->source, max_namelen, max_pathlen); + ret = nfs_parse_source(fc, max_namelen, max_pathlen); if (ret < 0) return ret; /* Load the NFS protocol module if we haven't done so yet */ - if (!ctx->mount_info.nfs_mod) { + if (!ctx->nfs_mod) { nfs_mod = get_nfs_version(ctx->version); if (IS_ERR(nfs_mod)) { ret = PTR_ERR(nfs_mod); goto out_version_unavailable; } - ctx->mount_info.nfs_mod = nfs_mod; + ctx->nfs_mod = nfs_mod; } return 0; out_no_device_name: dfprintk(MOUNT, "NFS: Device name not specified\n"); return -EINVAL; -#if !IS_ENABLED(CONFIG_NFS_V4) out_v4_not_compiled: dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); return -EPROTONOSUPPORT; -#else out_invalid_transport_udp: dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); return -EINVAL; -#endif /* !CONFIG_NFS_V4 */ out_no_address: dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); return -EINVAL; @@ -1332,7 +1293,7 @@ static int nfs_get_tree(struct fs_context *fc) if (err) return err; if (!ctx->internal) - return ctx->mount_info.nfs_mod->rpc_ops->try_get_tree(fc); + return ctx->nfs_mod->rpc_ops->try_get_tree(fc); else return nfs_get_tree_common(fc); } @@ -1351,20 +1312,19 @@ static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) if (!ctx) return -ENOMEM; - ctx->mount_info.mntfh = nfs_alloc_fhandle(); - if (!ctx->mount_info.mntfh) { + ctx->mntfh = nfs_alloc_fhandle(); + if (!ctx->mntfh) { kfree(ctx); return -ENOMEM; } - nfs_copy_fh(ctx->mount_info.mntfh, src->mount_info.mntfh); + nfs_copy_fh(ctx->mntfh, src->mntfh); - __module_get(ctx->mount_info.nfs_mod->owner); + __module_get(ctx->nfs_mod->owner); ctx->client_address = NULL; ctx->mount_server.hostname = NULL; ctx->nfs_server.export_path = NULL; ctx->nfs_server.hostname = NULL; ctx->fscache_uniq = NULL; - ctx->clone_data.addr = NULL; ctx->clone_data.fattr = NULL; fc->fs_private = ctx; return 0; @@ -1375,17 +1335,16 @@ static void nfs_fs_context_free(struct fs_context *fc) struct nfs_fs_context *ctx = nfs_fc2context(fc); if (ctx) { - if (ctx->mount_info.server) - nfs_free_server(ctx->mount_info.server); - if (ctx->mount_info.nfs_mod) - put_nfs_version(ctx->mount_info.nfs_mod); + if (ctx->server) + nfs_free_server(ctx->server); + if (ctx->nfs_mod) + put_nfs_version(ctx->nfs_mod); kfree(ctx->client_address); kfree(ctx->mount_server.hostname); kfree(ctx->nfs_server.export_path); kfree(ctx->nfs_server.hostname); kfree(ctx->fscache_uniq); - nfs_free_fhandle(ctx->mount_info.mntfh); - kfree(ctx->clone_data.addr); + nfs_free_fhandle(ctx->mntfh); nfs_free_fattr(ctx->clone_data.fattr); kfree(ctx); } @@ -1413,9 +1372,8 @@ static int nfs_init_fs_context(struct fs_context *fc) if (unlikely(!ctx)) return -ENOMEM; - ctx->mount_info.ctx = ctx; - ctx->mount_info.mntfh = nfs_alloc_fhandle(); - if (unlikely(!ctx->mount_info.mntfh)) { + ctx->mntfh = nfs_alloc_fhandle(); + if (unlikely(!ctx->mntfh)) { kfree(ctx); return -ENOMEM; } @@ -1452,8 +1410,8 @@ static int nfs_init_fs_context(struct fs_context *fc) fc->net_ns = get_net(net); } - ctx->mount_info.nfs_mod = nfss->nfs_client->cl_nfs_mod; - __module_get(ctx->mount_info.nfs_mod->owner); + ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod; + __module_get(ctx->nfs_mod->owner); } else { /* defaults */ ctx->timeo = NFS_UNSPEC_TIMEO; @@ -1468,7 +1426,6 @@ static int nfs_init_fs_context(struct fs_context *fc) ctx->minorversion = 0; ctx->need_mount = true; } - ctx->net = fc->net_ns; fc->fs_private = ctx; fc->ops = &nfs_fs_context_ops; return 0; diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index 3800ab6f08fa..4a8df8c30a03 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -128,7 +128,7 @@ void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, int return; key->nfs_client = nfss->nfs_client; - key->key.super.s_flags = sb->s_flags & NFS_MS_MASK; + key->key.super.s_flags = sb->s_flags & NFS_SB_MASK; key->key.nfs_server.flags = nfss->flags; key->key.nfs_server.rsize = nfss->rsize; key->key.nfs_server.wsize = nfss->wsize; diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index 878c4c5982d9..ab45496d23a6 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -64,66 +64,68 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i /* * get an NFS2/NFS3 root dentry from the root filehandle */ -struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh, - const char *devname) +int nfs_get_root(struct super_block *s, struct fs_context *fc) { - struct nfs_server *server = NFS_SB(sb); + struct nfs_fs_context *ctx = nfs_fc2context(fc); + struct nfs_server *server = NFS_SB(s); struct nfs_fsinfo fsinfo; - struct dentry *ret; + struct dentry *root; struct inode *inode; - void *name = kstrdup(devname, GFP_KERNEL); - int error; + char *name; + int error = -ENOMEM; + name = kstrdup(fc->source, GFP_KERNEL); if (!name) - return ERR_PTR(-ENOMEM); + goto out; /* get the actual root for this mount */ fsinfo.fattr = nfs_alloc_fattr(); - if (fsinfo.fattr == NULL) { - kfree(name); - return ERR_PTR(-ENOMEM); - } + if (fsinfo.fattr == NULL) + goto out_name; - error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo); + error = server->nfs_client->rpc_ops->getroot(server, ctx->mntfh, &fsinfo); if (error < 0) { dprintk("nfs_get_root: getattr error = %d\n", -error); - ret = ERR_PTR(error); - goto out; + goto out_fattr; } - inode = nfs_fhget(sb, mntfh, fsinfo.fattr, NULL); + inode = nfs_fhget(s, ctx->mntfh, fsinfo.fattr, NULL); if (IS_ERR(inode)) { dprintk("nfs_get_root: get root inode failed\n"); - ret = ERR_CAST(inode); - goto out; + error = PTR_ERR(inode); + goto out_fattr; } - error = nfs_superblock_set_dummy_root(sb, inode); - if (error != 0) { - ret = ERR_PTR(error); - goto out; - } + error = nfs_superblock_set_dummy_root(s, inode); + if (error != 0) + goto out_fattr; /* root dentries normally start off anonymous and get spliced in later * if the dentry tree reaches them; however if the dentry already * exists, we'll pick it up at this point and use it as the root */ - ret = d_obtain_root(inode); - if (IS_ERR(ret)) { + root = d_obtain_root(inode); + if (IS_ERR(root)) { dprintk("nfs_get_root: get root dentry failed\n"); - goto out; + error = PTR_ERR(root); + goto out_fattr; } - security_d_instantiate(ret, inode); - spin_lock(&ret->d_lock); - if (IS_ROOT(ret) && !ret->d_fsdata && - !(ret->d_flags & DCACHE_NFSFS_RENAMED)) { - ret->d_fsdata = name; + security_d_instantiate(root, inode); + spin_lock(&root->d_lock); + if (IS_ROOT(root) && !root->d_fsdata && + !(root->d_flags & DCACHE_NFSFS_RENAMED)) { + root->d_fsdata = name; name = NULL; } - spin_unlock(&ret->d_lock); -out: - kfree(name); + spin_unlock(&root->d_lock); + fc->root = root; + error = 0; + +out_fattr: nfs_free_fattr(fsinfo.fattr); - return ret; +out_name: + kfree(name); +out: + return error; } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 1cd09df9e0b5..a1fd4c3ebc4e 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -11,7 +11,7 @@ #include #include -#define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) +#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) extern const struct export_operations nfs_export_ops; @@ -33,17 +33,6 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) return 1; } -struct nfs_clone_mount { - const struct super_block *sb; - struct dentry *dentry; - char *hostname; - char *mnt_path; - struct sockaddr *addr; - size_t addrlen; - rpc_authflavor_t authflavor; - struct nfs_fattr *fattr; -}; - /* * Note: RFC 1813 doesn't limit the number of auth flavors that * a server can return, so make something up. @@ -80,15 +69,6 @@ struct nfs_client_initdata { const struct cred *cred; }; -struct nfs_mount_info { - unsigned int inherited_bsize; - struct nfs_fs_context *ctx; - struct nfs_clone_mount *cloned; - struct nfs_server *server; - struct nfs_fh *mntfh; - struct nfs_subversion *nfs_mod; -}; - /* * In-kernel mount arguments */ @@ -140,13 +120,17 @@ struct nfs_fs_context { unsigned short export_path_len; } nfs_server; - void *lsm_opts; - struct net *net; - - char buf[32]; /* Parse buffer */ - - struct nfs_mount_info mount_info; - struct nfs_clone_mount clone_data; + struct nfs_fh *mntfh; + struct nfs_server *server; + struct nfs_subversion *nfs_mod; + + /* Information for a cloned mount. */ + struct nfs_clone_mount { + struct super_block *sb; + struct dentry *dentry; + struct nfs_fattr *fattr; + unsigned int inherited_bsize; + } clone_data; }; static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) @@ -194,10 +178,9 @@ extern struct nfs_client *nfs4_find_client_ident(struct net *, int); extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); -extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); -extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); -extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, - struct nfs_fh *); +extern struct nfs_server *nfs_create_server(struct fs_context *); +extern struct nfs_server *nfs4_create_server(struct fs_context *); +extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); extern int nfs4_update_server(struct nfs_server *server, const char *hostname, struct sockaddr *sap, size_t salen, struct net *net); @@ -444,12 +427,8 @@ int nfs_submount(struct fs_context *, struct nfs_server *); int nfs_do_submount(struct fs_context *); /* getroot.c */ -extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, - const char *); +extern int nfs_get_root(struct super_block *s, struct fs_context *fc); #if IS_ENABLED(CONFIG_NFS_V4) -extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, - const char *); - extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); #endif diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 9b344fcd23b0..d537350c1fb7 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -176,8 +176,8 @@ struct vfsmount *nfs_d_automount(struct path *path) ctx->version = client->rpc_ops->version; ctx->minorversion = client->cl_minorversion; - ctx->mount_info.nfs_mod = client->cl_nfs_mod; - __module_get(ctx->mount_info.nfs_mod->owner); + ctx->nfs_mod = client->cl_nfs_mod; + __module_get(ctx->nfs_mod->owner); ret = client->rpc_ops->submount(fc, server); if (ret < 0) { @@ -262,22 +262,22 @@ int nfs_do_submount(struct fs_context *fc) int ret; /* create a new volume representation */ - server = ctx->mount_info.nfs_mod->rpc_ops->clone_server(NFS_SB(ctx->clone_data.sb), - ctx->mount_info.mntfh, + server = ctx->nfs_mod->rpc_ops->clone_server(NFS_SB(ctx->clone_data.sb), + ctx->mntfh, ctx->clone_data.fattr, ctx->selected_flavor); if (IS_ERR(server)) return PTR_ERR(server); - ctx->mount_info.server = server; + ctx->server = server; buffer = kmalloc(4096, GFP_USER); if (!buffer) return -ENOMEM; ctx->internal = true; - ctx->mount_info.inherited_bsize = ctx->clone_data.sb->s_blocksize_bits; + ctx->clone_data.inherited_bsize = ctx->clone_data.sb->s_blocksize_bits; p = nfs_devname(dentry, buffer, 4096); if (IS_ERR(p)) { @@ -302,7 +302,7 @@ int nfs_submount(struct fs_context *fc, struct nfs_server *server) /* Look it up again to get its attributes */ err = server->nfs_client->rpc_ops->lookup(d_inode(parent), &dentry->d_name, - ctx->mount_info.mntfh, ctx->clone_data.fattr, + ctx->mntfh, ctx->clone_data.fattr, NULL); dput(parent); if (err != 0) diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h index 09602dc1889f..1b950b66b3bb 100644 --- a/fs/nfs/nfs3_fs.h +++ b/fs/nfs/nfs3_fs.h @@ -27,7 +27,7 @@ static inline int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, #endif /* CONFIG_NFS_V3_ACL */ /* nfs3client.c */ -struct nfs_server *nfs3_create_server(struct nfs_mount_info *); +struct nfs_server *nfs3_create_server(struct fs_context *); struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c index 54727d3d3042..5601e47360c2 100644 --- a/fs/nfs/nfs3client.c +++ b/fs/nfs/nfs3client.c @@ -46,9 +46,10 @@ static inline void nfs_init_server_aclclient(struct nfs_server *server) } #endif -struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info) +struct nfs_server *nfs3_create_server(struct fs_context *fc) { - struct nfs_server *server = nfs_create_server(mount_info); + struct nfs_server *server = nfs_create_server(fc); + /* Create a client RPC handle for the NFS v3 ACL management interface */ if (!IS_ERR(server)) nfs_init_server_aclclient(server); diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 2216d166768b..0cd767e5c977 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1055,9 +1055,9 @@ out: /* * Create a version 4 volume record */ -static int nfs4_init_server(struct nfs_server *server, - struct nfs_fs_context *ctx) +static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct rpc_timeout timeparms; int error; @@ -1079,15 +1079,15 @@ static int nfs4_init_server(struct nfs_server *server, /* Get a client record */ error = nfs4_set_client(server, - ctx->nfs_server.hostname, - (const struct sockaddr *)&ctx->nfs_server.address, - ctx->nfs_server.addrlen, - ctx->client_address, - ctx->nfs_server.protocol, - &timeparms, - ctx->minorversion, - ctx->nfs_server.nconnect, - ctx->net); + ctx->nfs_server.hostname, + &ctx->nfs_server.address, + ctx->nfs_server.addrlen, + ctx->client_address, + ctx->nfs_server.protocol, + &timeparms, + ctx->minorversion, + ctx->nfs_server.nconnect, + fc->net_ns); if (error < 0) return error; @@ -1110,10 +1110,9 @@ static int nfs4_init_server(struct nfs_server *server, * Create a version 4 volume record * - keyed on server and FSID */ -/*struct nfs_server *nfs4_create_server(const struct nfs_fs_context *data, - struct nfs_fh *mntfh)*/ -struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) +struct nfs_server *nfs4_create_server(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_server *server; bool auth_probe; int error; @@ -1124,14 +1123,14 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info) server->cred = get_cred(current_cred()); - auth_probe = mount_info->ctx->auth_info.flavor_len < 1; + auth_probe = ctx->auth_info.flavor_len < 1; /* set up the general RPC client */ - error = nfs4_init_server(server, mount_info->ctx); + error = nfs4_init_server(server, fc); if (error < 0) goto error; - error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); + error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); if (error < 0) goto error; @@ -1145,9 +1144,9 @@ error: /* * Create an NFS4 referral server record */ -struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, - struct nfs_fh *mntfh) +struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_client *parent_client; struct nfs_server *server, *parent_server; bool auth_probe; @@ -1157,7 +1156,7 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, if (!server) return ERR_PTR(-ENOMEM); - parent_server = NFS_SB(data->sb); + parent_server = NFS_SB(ctx->clone_data.sb); parent_client = parent_server->nfs_client; server->cred = get_cred(parent_server->cred); @@ -1167,10 +1166,11 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, /* Get a client representation */ #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) - rpc_set_port(data->addr, NFS_RDMA_PORT); - error = nfs4_set_client(server, data->hostname, - data->addr, - data->addrlen, + rpc_set_port(&ctx->nfs_server.address, NFS_RDMA_PORT); + error = nfs4_set_client(server, + ctx->nfs_server.hostname, + &ctx->nfs_server.address, + ctx->nfs_server.addrlen, parent_client->cl_ipaddr, XPRT_TRANSPORT_RDMA, parent_server->client->cl_timeout, @@ -1181,10 +1181,11 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, goto init_server; #endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ - rpc_set_port(data->addr, NFS_PORT); - error = nfs4_set_client(server, data->hostname, - data->addr, - data->addrlen, + rpc_set_port(&ctx->nfs_server.address, NFS_PORT); + error = nfs4_set_client(server, + ctx->nfs_server.hostname, + &ctx->nfs_server.address, + ctx->nfs_server.addrlen, parent_client->cl_ipaddr, XPRT_TRANSPORT_TCP, parent_server->client->cl_timeout, @@ -1197,13 +1198,14 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) init_server: #endif - error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); + error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, + ctx->selected_flavor); if (error < 0) goto error; auth_probe = parent_server->auth_info.flavor_len < 1; - error = nfs4_server_common_setup(server, mntfh, auth_probe); + error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); if (error < 0) goto error; diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index a1a0c4c53ce1..10e9e1887841 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -130,9 +130,10 @@ static int nfs4_validate_fspath(struct dentry *dentry, const struct nfs4_fs_locations *locations, struct nfs_fs_context *ctx) { - const char *path, *fs_path; - char *buf; + const char *path; + char *fs_path; unsigned short len; + char *buf; int n; buf = kmalloc(4096, GFP_KERNEL); @@ -278,7 +279,6 @@ out: static int try_location(struct fs_context *fc, const struct nfs4_fs_location *location) { - const size_t addr_bufsize = sizeof(struct sockaddr_storage); struct nfs_fs_context *ctx = nfs_fc2context(fc); unsigned int len, s; char *export_path, *source, *p; @@ -314,29 +314,24 @@ static int try_location(struct fs_context *fc, kfree(fc->source); fc->source = source; - - ctx->clone_data.addr = kmalloc(addr_bufsize, GFP_KERNEL); - if (ctx->clone_data.addr == NULL) - return -ENOMEM; for (s = 0; s < location->nservers; s++) { const struct nfs4_string *buf = &location->servers[s]; if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len)) continue; - ctx->clone_data.addrlen = + ctx->nfs_server.addrlen = nfs_parse_server_name(buf->data, buf->len, - ctx->clone_data.addr, - addr_bufsize, + &ctx->nfs_server.address, + sizeof(ctx->nfs_server._address), fc->net_ns); - if (ctx->clone_data.addrlen == 0) + if (ctx->nfs_server.addrlen == 0) continue; - rpc_set_port(ctx->clone_data.addr, NFS_PORT); + rpc_set_port(&ctx->nfs_server.address, NFS_PORT); memcpy(ctx->nfs_server.hostname, buf->data, buf->len); ctx->nfs_server.hostname[buf->len] = '\0'; - ctx->clone_data.hostname = ctx->nfs_server.hostname; p = source; memcpy(p, buf->data, buf->len); @@ -449,7 +444,7 @@ int nfs4_submount(struct fs_context *fc, struct nfs_server *server) int ret; /* Look it up again to get its attributes and sec flavor */ - client = nfs4_proc_lookup_mountpoint(dir, name, ctx->mount_info.mntfh, + client = nfs4_proc_lookup_mountpoint(dir, name, ctx->mntfh, ctx->clone_data.fattr); dput(parent); if (IS_ERR(client)) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 469726410c5c..7d5ed37633d8 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -35,12 +35,12 @@ static const struct super_operations nfs4_sops = { }; struct nfs_subversion nfs_v4 = { - .owner = THIS_MODULE, - .nfs_fs = &nfs4_fs_type, - .rpc_vers = &nfs_version4, - .rpc_ops = &nfs_v4_clientops, - .sops = &nfs4_sops, - .xattr = nfs4_xattr_handlers, + .owner = THIS_MODULE, + .nfs_fs = &nfs4_fs_type, + .rpc_vers = &nfs_version4, + .rpc_ops = &nfs_v4_clientops, + .sops = &nfs4_sops, + .xattr = nfs4_xattr_handlers, }; static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc) @@ -168,7 +168,7 @@ static int do_nfs4_mount(struct nfs_server *server, root_ctx = nfs_fc2context(root_fc); root_ctx->internal = true; - root_ctx->mount_info.server = server; + root_ctx->server = server; /* We leave export_path unset as it's not used to find the root. */ len = strlen(hostname) + 5; @@ -221,7 +221,7 @@ int nfs4_try_get_tree(struct fs_context *fc) /* We create a mount for the server's root, walk to the requested * location and then create another mount for that. */ - err= do_nfs4_mount(nfs4_create_server(&ctx->mount_info), + err= do_nfs4_mount(nfs4_create_server(fc), fc, ctx->nfs_server.hostname, ctx->nfs_server.export_path); if (err) { @@ -243,7 +243,7 @@ int nfs4_get_referral_tree(struct fs_context *fc) dprintk("--> nfs4_referral_mount()\n"); /* create a new volume representation */ - err = do_nfs4_mount(nfs4_create_referral_server(&ctx->clone_data, ctx->mount_info.mntfh), + err = do_nfs4_mount(nfs4_create_referral_server(fc), fc, ctx->nfs_server.hostname, ctx->nfs_server.export_path); if (err) { @@ -254,7 +254,6 @@ int nfs4_get_referral_tree(struct fs_context *fc) return err; } - static int __init init_nfs_v4(void) { int err; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 6ff99da978a8..ed0290d5ebf3 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -745,11 +745,12 @@ out: * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_request_mount(struct nfs_fs_context *ctx, +static int nfs_request_mount(struct fs_context *fc, struct nfs_fh *root_fh, rpc_authflavor_t *server_authlist, unsigned int *server_authlist_len) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); struct nfs_mount_request request = { .sap = (struct sockaddr *) &ctx->mount_server.address, @@ -759,7 +760,7 @@ static int nfs_request_mount(struct nfs_fs_context *ctx, .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, - .net = ctx->net, + .net = fc->net_ns, }; int status; @@ -804,20 +805,18 @@ static int nfs_request_mount(struct nfs_fs_context *ctx, return 0; } -static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info) +static struct nfs_server *nfs_try_mount_request(struct fs_context *fc) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); int status; unsigned int i; bool tried_auth_unix = false; bool auth_null_in_list = false; struct nfs_server *server = ERR_PTR(-EACCES); - struct nfs_fs_context *ctx = mount_info->ctx; rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; unsigned int authlist_len = ARRAY_SIZE(authlist); - struct nfs_subversion *nfs_mod = mount_info->nfs_mod; - status = nfs_request_mount(ctx, mount_info->mntfh, authlist, - &authlist_len); + status = nfs_request_mount(fc, ctx->mntfh, authlist, &authlist_len); if (status) return ERR_PTR(status); @@ -831,7 +830,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf ctx->selected_flavor); if (status) return ERR_PTR(status); - return nfs_mod->rpc_ops->create_server(mount_info); + return ctx->nfs_mod->rpc_ops->create_server(fc); } /* @@ -858,7 +857,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); ctx->selected_flavor = flavor; - server = nfs_mod->rpc_ops->create_server(mount_info); + server = ctx->nfs_mod->rpc_ops->create_server(fc); if (!IS_ERR(server)) return server; } @@ -874,7 +873,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); ctx->selected_flavor = RPC_AUTH_UNIX; - return nfs_mod->rpc_ops->create_server(mount_info); + return ctx->nfs_mod->rpc_ops->create_server(fc); } int nfs_try_get_tree(struct fs_context *fc) @@ -882,9 +881,9 @@ int nfs_try_get_tree(struct fs_context *fc) struct nfs_fs_context *ctx = nfs_fc2context(fc); if (ctx->need_mount) - ctx->mount_info.server = nfs_try_mount_request(&ctx->mount_info); + ctx->server = nfs_try_mount_request(fc); else - ctx->mount_info.server = ctx->mount_info.nfs_mod->rpc_ops->create_server(&ctx->mount_info); + ctx->server = ctx->nfs_mod->rpc_ops->create_server(fc); return nfs_get_tree_common(fc); } @@ -966,9 +965,8 @@ EXPORT_SYMBOL_GPL(nfs_reconfigure); /* * Finish setting up an NFS superblock */ -static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) +static void nfs_fill_super(struct super_block *sb, struct nfs_fs_context *ctx) { - struct nfs_fs_context *ctx = mount_info->ctx; struct nfs_server *server = NFS_SB(sb); sb->s_blocksize_bits = 0; @@ -1009,13 +1007,14 @@ static void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_ nfs_super_set_maxbytes(sb, server->maxfilesize); } -static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) +static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, + const struct fs_context *fc) { const struct nfs_server *a = s->s_fs_info; const struct rpc_clnt *clnt_a = a->client; const struct rpc_clnt *clnt_b = b->client; - if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) + if ((s->s_flags & NFS_SB_MASK) != (fc->sb_flags & NFS_SB_MASK)) goto Ebusy; if (a->nfs_client != b->nfs_client) goto Ebusy; @@ -1122,7 +1121,7 @@ static int nfs_compare_super(struct super_block *sb, struct fs_context *fc) return 0; if (!nfs_compare_userns(old, server)) return 0; - return nfs_compare_mount_options(sb, server, fc->sb_flags); + return nfs_compare_mount_options(sb, server, fc); } #ifdef CONFIG_NFS_FSCACHE @@ -1177,13 +1176,12 @@ int nfs_get_tree_common(struct fs_context *fc) { struct nfs_fs_context *ctx = nfs_fc2context(fc); struct super_block *s; - struct dentry *mntroot = ERR_PTR(-ENOMEM); int (*compare_super)(struct super_block *, struct fs_context *) = nfs_compare_super; - struct nfs_server *server = ctx->mount_info.server; + struct nfs_server *server = ctx->server; unsigned long kflags = 0, kflags_out = 0; int error; - ctx->mount_info.server = NULL; + ctx->server = NULL; if (IS_ERR(server)) return PTR_ERR(server); @@ -1224,9 +1222,9 @@ int nfs_get_tree_common(struct fs_context *fc) } if (!s->s_root) { - unsigned bsize = ctx->mount_info.inherited_bsize; + unsigned bsize = ctx->clone_data.inherited_bsize; /* initial superblock/root creation */ - nfs_fill_super(s, &ctx->mount_info); + nfs_fill_super(s, ctx); if (bsize) { s->s_blocksize_bits = bsize; s->s_blocksize = 1U << bsize; @@ -1234,13 +1232,11 @@ int nfs_get_tree_common(struct fs_context *fc) nfs_get_cache_cookie(s, ctx); } - mntroot = nfs_get_root(s, ctx->mount_info.mntfh, fc->source); - if (IS_ERR(mntroot)) { - error = PTR_ERR(mntroot); + error = nfs_get_root(s, fc); + if (error < 0) { dfprintk(MOUNT, "NFS: Couldn't get root dentry\n"); goto error_splat_super; } - fc->root = mntroot; if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) kflags |= SECURITY_LSM_NATIVE_LABELS; diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 574741d5418d..0a36c6f62b58 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1722,7 +1722,7 @@ struct nfs_rpc_ops { struct nfs_client *(*init_client) (struct nfs_client *, const struct nfs_client_initdata *); void (*free_client) (struct nfs_client *); - struct nfs_server *(*create_server)(struct nfs_mount_info *); + struct nfs_server *(*create_server)(struct fs_context *); struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); }; -- cgit v1.2.3-59-g8ed1b From ce8866f0913ff157edc098f06bad07763ad317e7 Mon Sep 17 00:00:00 2001 From: Scott Mayhew Date: Tue, 10 Dec 2019 07:31:15 -0500 Subject: NFS: Attach supplementary error information to fs_context. Split out from commit "NFS: Add fs_context support." Add wrappers nfs_errorf(), nfs_invalf(), and nfs_warnf() which log error information to the fs_context. Convert some printk's to use these new wrappers instead. Signed-off-by: Scott Mayhew Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 105 ++++++++++++++++++---------------------------------- fs/nfs/getroot.c | 3 ++ fs/nfs/internal.h | 4 ++ fs/nfs/namespace.c | 2 +- fs/nfs/nfs4super.c | 2 + fs/nfs/super.c | 4 +- 6 files changed, 48 insertions(+), 72 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index e472334b978d..429315c011ae 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -318,10 +318,8 @@ static int nfs_auth_info_add(struct fs_context *fc, return 0; } - if (auth_info->flavor_len + 1 >= max_flavor_len) { - dfprintk(MOUNT, "NFS: too many sec= flavors\n"); - return -EINVAL; - } + if (auth_info->flavor_len + 1 >= max_flavor_len) + return nfs_invalf(fc, "NFS: too many sec= flavors"); auth_info->flavors[auth_info->flavor_len++] = flavor; return 0; @@ -378,9 +376,7 @@ static int nfs_parse_security_flavors(struct fs_context *fc, pseudoflavor = RPC_AUTH_GSS_SPKMP; break; default: - dfprintk(MOUNT, - "NFS: sec= option '%s' not recognized\n", p); - return -EINVAL; + return nfs_invalf(fc, "NFS: sec=%s option not recognized", p); } ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); @@ -425,8 +421,7 @@ static int nfs_parse_version_string(struct fs_context *fc, ctx->minorversion = 2; break; default: - dfprintk(MOUNT, "NFS: Unsupported NFS version\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unsupported NFS version"); } return 0; } @@ -451,10 +446,8 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, switch (opt) { case Opt_source: - if (fc->source) { - dfprintk(MOUNT, "NFS: Multiple sources not supported\n"); - return -EINVAL; - } + if (fc->source) + return nfs_invalf(fc, "NFS: Multiple sources not supported"); fc->source = param->string; param->string = NULL; break; @@ -664,8 +657,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, xprt_load_transport(param->string); break; default: - dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unrecognized transport protocol"); } ctx->protofamily = protofamily; @@ -688,8 +680,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, break; case Opt_xprt_rdma: /* not used for side protocols */ default: - dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unrecognized transport protocol"); } ctx->mountfamily = mountfamily; break; @@ -774,13 +765,11 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, return 0; out_invalid_value: - printk(KERN_INFO "NFS: Bad mount option value specified\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Bad mount option value specified"); out_invalid_address: - printk(KERN_INFO "NFS: Bad IP address specified\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Bad IP address specified"); out_of_bounds: - printk(KERN_INFO "NFS: Value for '%s' out of range\n", param->key); + nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key); return -ERANGE; } @@ -846,19 +835,15 @@ static int nfs_parse_source(struct fs_context *fc, return 0; out_bad_devname: - dfprintk(MOUNT, "NFS: device name not in host:path format\n"); - return -EINVAL; - + return nfs_invalf(fc, "NFS: device name not in host:path format"); out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); + nfs_errorf(fc, "NFS: not enough memory to parse device name"); return -ENOMEM; - out_hostname: - dfprintk(MOUNT, "NFS: server hostname too long\n"); + nfs_errorf(fc, "NFS: server hostname too long"); return -ENAMETOOLONG; - out_path: - dfprintk(MOUNT, "NFS: export pathname too long\n"); + nfs_errorf(fc, "NFS: export pathname too long"); return -ENAMETOOLONG; } @@ -1015,29 +1000,23 @@ out_no_data: ctx->skip_reconfig_option_check = true; return 0; } - dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: mount program didn't pass any mount data"); out_no_v3: - dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", - data->version); - return -EINVAL; + return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3"); out_no_sec: - dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS"); out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); + dfprintk(MOUNT, "NFS: not enough memory to handle mount options"); return -ENOMEM; out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); out_invalid_fh: - dfprintk(MOUNT, "NFS: invalid root filehandle\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: invalid root filehandle"); } #if IS_ENABLED(CONFIG_NFS_V4) @@ -1132,21 +1111,17 @@ out_no_data: ctx->skip_reconfig_option_check = true; return 0; } - dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS4: mount program didn't pass any mount data"); out_inval_auth: - dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", - data->auth_flavourlen); - return -EINVAL; + return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d", + data->auth_flavourlen); out_no_address: - dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS4: mount program didn't pass remote address"); out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; + return nfs_invalf(fc, "NFSv4: Unsupported transport protocol udp"); } #endif @@ -1164,8 +1139,7 @@ static int nfs_fs_context_parse_monolithic(struct fs_context *fc, return nfs4_parse_monolithic(fc, data); #endif - dfprintk(MOUNT, "NFS: Unsupported monolithic data version\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Unsupported monolithic data version"); } /* @@ -1253,32 +1227,25 @@ static int nfs_fs_context_validate(struct fs_context *fc) return 0; out_no_device_name: - dfprintk(MOUNT, "NFS: Device name not specified\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Device name not specified"); out_v4_not_compiled: - dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); + nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel"); return -EPROTONOSUPPORT; out_invalid_transport_udp: - dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); - return -EINVAL; + return nfs_invalf(fc, "NFSv4: Unsupported transport protocol udp"); out_no_address: - dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); out_mountproto_mismatch: - dfprintk(MOUNT, "NFS: Mount server address does not match mountproto= option\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option"); out_proto_mismatch: - dfprintk(MOUNT, "NFS: Server address does not match proto= option\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: Server address does not match proto= option"); out_minorversion_mismatch: - dfprintk(MOUNT, "NFS: Mount option vers=%u does not support minorversion=%u\n", + return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u", ctx->version, ctx->minorversion); - return -EINVAL; out_migration_misuse: - dfprintk(MOUNT, "NFS: 'Migration' not supported for this NFS version\n"); - return -EINVAL; + return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version"); out_version_unavailable: - dfprintk(MOUNT, "NFS: Version unavailable\n"); + nfs_errorf(fc, "NFS: Version unavailable"); return ret; } diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index ab45496d23a6..b012c2668a1f 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -86,6 +86,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc) error = server->nfs_client->rpc_ops->getroot(server, ctx->mntfh, &fsinfo); if (error < 0) { dprintk("nfs_get_root: getattr error = %d\n", -error); + nfs_errorf(fc, "NFS: Couldn't getattr on root"); goto out_fattr; } @@ -93,6 +94,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc) if (IS_ERR(inode)) { dprintk("nfs_get_root: get root inode failed\n"); error = PTR_ERR(inode); + nfs_errorf(fc, "NFS: Couldn't get root inode"); goto out_fattr; } @@ -108,6 +110,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc) if (IS_ERR(root)) { dprintk("nfs_get_root: get root dentry failed\n"); error = PTR_ERR(root); + nfs_errorf(fc, "NFS: Couldn't get root dentry"); goto out_fattr; } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index a1fd4c3ebc4e..c0257411e158 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -133,6 +133,10 @@ struct nfs_fs_context { } clone_data; }; +#define nfs_errorf(fc, fmt, ...) errorf(fc, fmt, ## __VA_ARGS__) +#define nfs_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__) +#define nfs_warnf(fc, fmt, ...) warnf(fc, fmt, ## __VA_ARGS__) + static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) { return fc->fs_private; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index d537350c1fb7..4fd22c0d730c 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -281,7 +281,7 @@ int nfs_do_submount(struct fs_context *fc) p = nfs_devname(dentry, buffer, 4096); if (IS_ERR(p)) { - dprintk("NFS: Couldn't determine submount pathname\n"); + nfs_errorf(fc, "NFS: Couldn't determine submount pathname"); ret = PTR_ERR(p); } else { ret = vfs_parse_fs_string(fc, "source", p, buffer + 4096 - p); diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 7d5ed37633d8..1475f932d7da 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -225,6 +225,7 @@ int nfs4_try_get_tree(struct fs_context *fc) fc, ctx->nfs_server.hostname, ctx->nfs_server.export_path); if (err) { + nfs_errorf(fc, "NFS4: Couldn't follow remote path"); dfprintk(MOUNT, "<-- nfs4_try_get_tree() = %d [error]\n", err); } else { dfprintk(MOUNT, "<-- nfs4_try_get_tree() = 0\n"); @@ -247,6 +248,7 @@ int nfs4_get_referral_tree(struct fs_context *fc) fc, ctx->nfs_server.hostname, ctx->nfs_server.export_path); if (err) { + nfs_errorf(fc, "NFS4: Couldn't follow remote path"); dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = %d [error]\n", err); } else { dfprintk(MOUNT, "<-- nfs4_get_referral_tree() = 0\n"); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index ed0290d5ebf3..76e0198adcfa 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1205,7 +1205,7 @@ int nfs_get_tree_common(struct fs_context *fc) fc->s_fs_info = NULL; if (IS_ERR(s)) { error = PTR_ERR(s); - dfprintk(MOUNT, "NFS: Couldn't get superblock\n"); + nfs_errorf(fc, "NFS: Couldn't get superblock"); goto out_err_nosb; } @@ -1234,7 +1234,7 @@ int nfs_get_tree_common(struct fs_context *fc) error = nfs_get_root(s, fc); if (error < 0) { - dfprintk(MOUNT, "NFS: Couldn't get root dentry\n"); + nfs_errorf(fc, "NFS: Couldn't get root dentry"); goto error_splat_super; } -- cgit v1.2.3-59-g8ed1b From ae08483cdd666045b60ceb502dcbf30038334d58 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 11 Nov 2019 21:16:23 +0100 Subject: nfs: use timespec64 in nfs_fattr Push down the use of timespec64 into NFS nfs_fattr, to avoid needless conversions, and get closer to having 64-bit time_t support on 32-bit NFSv4 and removing some old interfaces from the kernel. Signed-off-by: Arnd Bergmann Signed-off-by: Anna Schumaker --- fs/nfs/internal.h | 4 ++-- fs/nfs/nfs4xdr.c | 10 +++++----- 2 files changed, 7 insertions(+), 7 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index c0257411e158..17f082442804 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -697,9 +697,9 @@ unsigned int nfs_page_array_len(unsigned int base, size_t len) } /* - * Convert a struct timespec into a 64-bit change attribute + * Convert a struct timespec64 into a 64-bit change attribute * - * This does approximately the same thing as timespec_to_ns(), + * This does approximately the same thing as timespec64_to_ns(), * but for calculation efficiency, we multiply the seconds by * 1024*1024*1024. */ diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 936c57779ff4..728d88b6a698 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4097,7 +4097,7 @@ static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, str status = NFS_ATTR_FATTR_ATIME; bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS; } - dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec); + dprintk("%s: atime=%lld\n", __func__, time->tv_sec); return status; } @@ -4115,7 +4115,7 @@ static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, s status = NFS_ATTR_FATTR_CTIME; bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA; } - dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec); + dprintk("%s: ctime=%lld\n", __func__, time->tv_sec); return status; } @@ -4132,8 +4132,8 @@ static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap, status = decode_attr_time(xdr, time); bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA; } - dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec, - (long)time->tv_nsec); + dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec, + time->tv_nsec); return status; } @@ -4197,7 +4197,7 @@ static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, str status = NFS_ATTR_FATTR_MTIME; bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY; } - dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec); + dprintk("%s: mtime=%lld\n", __func__, time->tv_sec); return status; } -- cgit v1.2.3-59-g8ed1b From bc35b6b0cf4a83da5015ae8f1aa072a05586ee84 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 11 Nov 2019 21:16:25 +0100 Subject: nfs: fscache: use timespec64 in inode auxdata nfs currently behaves differently on 32-bit and 64-bit kernels regarding the on-disk format of nfs_fscache_inode_auxdata. That format should really be the same on any kernel, and we should avoid the 'timespec' type in order to remove that from the kernel later on. Using plain 'timespec64' would not be good here, since that includes implied padding and would possibly leak kernel stack data to the on-disk format on 32-bit architectures. struct __kernel_timespec would work as a replacement, but open-coding the two struct members in nfs_fscache_inode_auxdata makes it more obvious what's going on here, and keeps the current format for 64-bit architectures. Cc: David Howells Signed-off-by: Arnd Bergmann Signed-off-by: Anna Schumaker --- fs/nfs/fscache-index.c | 6 ++++-- fs/nfs/fscache.c | 18 ++++++++++++------ fs/nfs/fscache.h | 8 +++++--- 3 files changed, 21 insertions(+), 11 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c index 15f271401dcc..573b1da9342c 100644 --- a/fs/nfs/fscache-index.c +++ b/fs/nfs/fscache-index.c @@ -84,8 +84,10 @@ enum fscache_checkaux nfs_fscache_inode_check_aux(void *cookie_netfs_data, return FSCACHE_CHECKAUX_OBSOLETE; memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index 4a8df8c30a03..52270bfac120 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -238,8 +238,10 @@ void nfs_fscache_init_inode(struct inode *inode) return; memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); @@ -263,8 +265,10 @@ void nfs_fscache_clear_inode(struct inode *inode) dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie); memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; fscache_relinquish_cookie(cookie, &auxdata, false); nfsi->fscache = NULL; } @@ -305,8 +309,10 @@ void nfs_fscache_open_file(struct inode *inode, struct file *filp) return; memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; if (inode_is_open_for_write(inode)) { dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi); diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index ad041cfbf9ec..6754c8607230 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -62,9 +62,11 @@ struct nfs_fscache_key { * cache object. */ struct nfs_fscache_inode_auxdata { - struct timespec mtime; - struct timespec ctime; - u64 change_attr; + s64 mtime_sec; + s64 mtime_nsec; + s64 ctime_sec; + s64 ctime_nsec; + u64 change_attr; }; /* -- cgit v1.2.3-59-g8ed1b From e5189e9a51172de650b263f0f8bc87a02d728c58 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 11 Nov 2019 21:16:26 +0100 Subject: nfs: remove timespec from xdr_encode_nfstime For NFSv2 and NFSv3, timestamps are stored using 32-bit entities and overflow in y2038. For historic reasons we truncate the 64-bit timestamps by converting from a timespec64 to a timespec first. Remove this unnecessary conversion step and do the truncation in the final functions that take a timestamp. This is transparent to users, but avoids one of the last uses of 'timespec' and lets us remove it later. Signed-off-by: Arnd Bergmann Signed-off-by: Anna Schumaker --- fs/nfs/nfs2xdr.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index d94c7abdf25a..f6676af37d5d 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -360,17 +360,17 @@ static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr, else *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); - if (attr->ia_valid & ATTR_ATIME_SET) { + if (attr->ia_valid & ATTR_ATIME_SET) p = xdr_encode_time(p, &attr->ia_atime); - } else if (attr->ia_valid & ATTR_ATIME) { + else if (attr->ia_valid & ATTR_ATIME) p = xdr_encode_current_server_time(p, &attr->ia_atime); - } else + else p = xdr_time_not_set(p); - if (attr->ia_valid & ATTR_MTIME_SET) { + if (attr->ia_valid & ATTR_MTIME_SET) xdr_encode_time(p, &attr->ia_mtime); - } else if (attr->ia_valid & ATTR_MTIME) { + else if (attr->ia_valid & ATTR_MTIME) xdr_encode_current_server_time(p, &attr->ia_mtime); - } else + else xdr_time_not_set(p); } -- cgit v1.2.3-59-g8ed1b From a3167dacbad3a42dffb78cca8684fafcd94575f9 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 11 Nov 2019 21:16:27 +0100 Subject: nfs: encode nfsv4 timestamps as 64-bit On 32-bit architectures, xdr_encode_nfstime4() needlessly truncates timestamps to a 32-bit value in the range between year 1902 and 2038. Change it to use 'struct timespec64' to allow the entire range of values supported by the server. Signed-off-by: Arnd Bergmann Signed-off-by: Anna Schumaker --- fs/nfs/nfs4xdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 728d88b6a698..8de4d250924b 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -1061,7 +1061,7 @@ static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *ve static __be32 * xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t) { - p = xdr_encode_hyper(p, (__s64)t->tv_sec); + p = xdr_encode_hyper(p, t->tv_sec); *p++ = cpu_to_be32(t->tv_nsec); return p; } -- cgit v1.2.3-59-g8ed1b From 8b98a532481d6f2075b460dbc157f0502f1803a8 Mon Sep 17 00:00:00 2001 From: zhengbin Date: Thu, 19 Dec 2019 18:34:47 +0800 Subject: NFS4: Remove unneeded semicolon Fixes coccicheck warning: fs/nfs/nfs4state.c:1138:2-3: Unneeded semicolon fs/nfs/nfs4proc.c:6862:2-3: Unneeded semicolon fs/nfs/nfs4proc.c:8629:2-3: Unneeded semicolon Reported-by: Hulk Robot Signed-off-by: zhengbin Signed-off-by: Anna Schumaker --- fs/nfs/nfs4proc.c | 4 ++-- fs/nfs/nfs4state.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 5f51f62b0652..904335b91b6a 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -6859,7 +6859,7 @@ static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_ case -NFS4ERR_STALE_STATEID: lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; nfs4_schedule_lease_recovery(server->nfs_client); - }; + } } static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) @@ -8626,7 +8626,7 @@ static int _nfs4_proc_create_session(struct nfs_client *clp, case -EACCES: case -EAGAIN: goto out; - }; + } clp->cl_seqid++; if (!status) { diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 34552329233d..fe1b908eecc8 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1135,7 +1135,7 @@ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) case -NFS4ERR_MOVED: /* Non-seqid mutating errors */ return; - }; + } /* * Note: no locking needed as we are guaranteed to be first * on the sequence list -- cgit v1.2.3-59-g8ed1b From 6ed2144a80ebd9e40fa15a369f5528bafbc9b50d Mon Sep 17 00:00:00 2001 From: zhengbin Date: Thu, 19 Dec 2019 14:14:18 +0800 Subject: NFS: move dprintk after nfs_alloc_fattr in nfs3_proc_lookup In nfs3_proc_lookup, if nfs_alloc_fattr fails, will only print "NFS call lookup". This may be confusing, move dprintk after nfs_alloc_fattr. Reported-by: Hulk Robot Signed-off-by: zhengbin Signed-off-by: Anna Schumaker --- fs/nfs/nfs3proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 657041c3a03f..67a05f35bb89 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -169,11 +169,11 @@ nfs3_proc_lookup(struct inode *dir, const struct qstr *name, }; int status; - dprintk("NFS call lookup %s\n", name->name); res.dir_attr = nfs_alloc_fattr(); if (res.dir_attr == NULL) return -ENOMEM; + dprintk("NFS call lookup %s\n", name->name); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_refresh_inode(dir, res.dir_attr); -- cgit v1.2.3-59-g8ed1b From 861e1671bc2eed063aa624cdb2be8cfff16331c9 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 23 Dec 2019 10:28:33 -0500 Subject: NFS: Introduce trace events triggered by page writeback errors Try to capture the reason for the writeback path tagging an error on a page. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- fs/nfs/nfstrace.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/write.c | 3 +++ 2 files changed, 48 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index f64a33d2a1d1..4d6eb1703943 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -989,6 +989,51 @@ TRACE_EVENT(nfs_writeback_done, ) ); +DECLARE_EVENT_CLASS(nfs_page_error_class, + TP_PROTO( + const struct nfs_page *req, + int error + ), + + TP_ARGS(req, error), + + TP_STRUCT__entry( + __field(const void *, req) + __field(pgoff_t, index) + __field(unsigned int, offset) + __field(unsigned int, pgbase) + __field(unsigned int, bytes) + __field(int, error) + ), + + TP_fast_assign( + __entry->req = req; + __entry->index = req->wb_index; + __entry->offset = req->wb_offset; + __entry->pgbase = req->wb_pgbase; + __entry->bytes = req->wb_bytes; + __entry->error = error; + ), + + TP_printk( + "req=%p index=%lu offset=%u pgbase=%u bytes=%u error=%d", + __entry->req, __entry->index, __entry->offset, + __entry->pgbase, __entry->bytes, __entry->error + ) +); + +#define DEFINE_NFS_PAGEERR_EVENT(name) \ + DEFINE_EVENT(nfs_page_error_class, name, \ + TP_PROTO( \ + const struct nfs_page *req, \ + int error \ + ), \ + TP_ARGS(req, error)) + +DEFINE_NFS_PAGEERR_EVENT(nfs_write_error); +DEFINE_NFS_PAGEERR_EVENT(nfs_comp_error); +DEFINE_NFS_PAGEERR_EVENT(nfs_commit_error); + TRACE_EVENT(nfs_initiate_commit, TP_PROTO( const struct nfs_commit_data *data diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 52cab65f91cf..21787711e352 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -593,6 +593,7 @@ release_request: static void nfs_write_error(struct nfs_page *req, int error) { nfs_set_pageerror(page_file_mapping(req->wb_page)); + trace_nfs_write_error(req, error); nfs_mapping_set_error(req->wb_page, error); nfs_inode_remove_request(req); nfs_end_page_writeback(req); @@ -999,6 +1000,7 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr) if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes < bytes)) { nfs_set_pageerror(page_file_mapping(req->wb_page)); + trace_nfs_comp_error(req, hdr->error); nfs_mapping_set_error(req->wb_page, hdr->error); goto remove_req; } @@ -1847,6 +1849,7 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data) (long long)req_offset(req)); if (status < 0) { if (req->wb_page) { + trace_nfs_commit_error(req, status); nfs_mapping_set_error(req->wb_page, status); nfs_inode_remove_request(req); } -- cgit v1.2.3-59-g8ed1b From 2bb50aabb6f32c11dc9b542b4bb214b14e031e6c Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 23 Dec 2019 10:28:38 -0500 Subject: NFS4: Report callback authentication errors This seems to be a somewhat common issue with Kerberos NFSv4.0 set-ups. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- fs/nfs/callback_xdr.c | 11 ++++++++--- fs/nfs/nfs4trace.h | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index 03a20f5716c7..79ff172eb1c8 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -18,6 +18,7 @@ #include "callback.h" #include "internal.h" #include "nfs4session.h" +#include "nfs4trace.h" #define CB_OP_TAGLEN_MAXSZ (512) #define CB_OP_HDR_RES_MAXSZ (2 * 4) // opcode, status @@ -946,9 +947,13 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp) if (hdr_arg.minorversion == 0) { cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); - if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) { - if (cps.clp) - nfs_put_client(cps.clp); + if (!cps.clp) { + trace_nfs_cb_no_clp(rqstp->rq_xid, hdr_arg.cb_ident); + goto out_invalidcred; + } + if (!check_gss_callback_principal(cps.clp, rqstp)) { + trace_nfs_cb_badprinc(rqstp->rq_xid, hdr_arg.cb_ident); + nfs_put_client(cps.clp); goto out_invalidcred; } } diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index e60b6fbd5ada..e3586c16ef59 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -691,6 +691,41 @@ TRACE_EVENT(nfs4_xdr_status, ) ); +DECLARE_EVENT_CLASS(nfs4_cb_error_class, + TP_PROTO( + __be32 xid, + u32 cb_ident + ), + + TP_ARGS(xid, cb_ident), + + TP_STRUCT__entry( + __field(u32, xid) + __field(u32, cbident) + ), + + TP_fast_assign( + __entry->xid = be32_to_cpu(xid); + __entry->cbident = cb_ident; + ), + + TP_printk( + "xid=0x%08x cb_ident=0x%08x", + __entry->xid, __entry->cbident + ) +); + +#define DEFINE_CB_ERROR_EVENT(name) \ + DEFINE_EVENT(nfs4_cb_error_class, nfs_cb_##name, \ + TP_PROTO( \ + __be32 xid, \ + u32 cb_ident \ + ), \ + TP_ARGS(xid, cb_ident)) + +DEFINE_CB_ERROR_EVENT(no_clp); +DEFINE_CB_ERROR_EVENT(badprinc); + DECLARE_EVENT_CLASS(nfs4_open_event, TP_PROTO( const struct nfs_open_context *ctx, -- cgit v1.2.3-59-g8ed1b From bd89bc67f64fa23846645ce8b1c3cb51efebab32 Mon Sep 17 00:00:00 2001 From: Murphy Zhou Date: Thu, 2 Jan 2020 16:04:26 +0800 Subject: fs/nfs, swapon: check holes in swapfile swapon over NFS does not go through generic_swapfile_activate code path when setting up extents. This makes holes in NFS swapfiles possible which is not expected for swapon. Signed-off-by: Murphy Zhou Signed-off-by: Anna Schumaker --- fs/nfs/file.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 8eb731d9be3e..ccd9bc098806 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -489,7 +489,19 @@ static int nfs_launder_page(struct page *page) static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file, sector_t *span) { + unsigned long blocks; + long long isize; struct rpc_clnt *clnt = NFS_CLIENT(file->f_mapping->host); + struct inode *inode = file->f_mapping->host; + + spin_lock(&inode->i_lock); + blocks = inode->i_blocks; + isize = inode->i_size; + spin_unlock(&inode->i_lock); + if (blocks*512 < isize) { + pr_warn("swap activate: swapfile has holes\n"); + return -EINVAL; + } *span = sis->pages; -- cgit v1.2.3-59-g8ed1b From 474c4f306eefbb21b67ebd1de802d005c7d7ecdc Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Mon, 30 Dec 2019 16:32:38 +0100 Subject: nfs: NFS_SWAP should depend on SWAP If CONFIG_SWAP=n, it does not make much sense to offer the user the option to enable support for swapping over NFS, as that will still fail at run time: # swapon /swap swapon: /swap: swapon failed: Function not implemented Fix this by adding a dependency on CONFIG_SWAP. Fixes: a564b8f0398636ba ("nfs: enable swap on NFS") Signed-off-by: Geert Uytterhoeven Signed-off-by: Anna Schumaker --- fs/nfs/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig index 295a7a21b774..e7dd07f47825 100644 --- a/fs/nfs/Kconfig +++ b/fs/nfs/Kconfig @@ -90,7 +90,7 @@ config NFS_V4 config NFS_SWAP bool "Provide swap over NFS support" default n - depends on NFS_FS + depends on NFS_FS && SWAP select SUNRPC_SWAP help This option enables swapon to work on files located on NFS mounts. -- cgit v1.2.3-59-g8ed1b From e0b27d98bfed9cd9a22f96996bab24858646883d Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Mon, 6 Jan 2020 13:17:34 +0000 Subject: NFS: Add missing null check for failed allocation Currently the allocation of buf is not being null checked and a null pointer dereference can occur when the memory allocation fails. Fix this by adding a check and returning -ENOMEM. Addresses-Coverity: ("Dereference null return") Fixes: 6d972518b821 ("NFS: Add fs_context support.") Signed-off-by: Colin Ian King Signed-off-by: Anna Schumaker --- fs/nfs/nfs4namespace.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 10e9e1887841..de6875a9b391 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -137,6 +137,9 @@ static int nfs4_validate_fspath(struct dentry *dentry, int n; buf = kmalloc(4096, GFP_KERNEL); + if (!buf) + return -ENOMEM; + path = nfs4_path(dentry, buf, 4096); if (IS_ERR(path)) { kfree(buf); -- cgit v1.2.3-59-g8ed1b From 0df68ced55443243951d02cc497be31fadf28173 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:00 -0500 Subject: NFS: Revalidate the file size on a fatal write error If we suffer a fatal error upon writing a file, which causes us to need to revalidate the entire mapping, then we should also revalidate the file size. Fixes: d2ceb7e57086 ("NFS: Don't use page_file_mapping after removing the page") Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/write.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 21787711e352..adedc16780c5 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -243,7 +243,15 @@ out: /* A writeback failed: mark the page as bad, and invalidate the page cache */ static void nfs_set_pageerror(struct address_space *mapping) { + struct inode *inode = mapping->host; + nfs_zap_mapping(mapping->host, mapping); + /* Force file size revalidation */ + spin_lock(&inode->i_lock); + NFS_I(inode)->cache_validity |= NFS_INO_REVAL_FORCED | + NFS_INO_REVAL_PAGECACHE | + NFS_INO_INVALID_SIZE; + spin_unlock(&inode->i_lock); } static void nfs_mapping_set_error(struct page *page, int error) -- cgit v1.2.3-59-g8ed1b From b8946d7bfb9417ec171693d4478a831420aead5f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:01 -0500 Subject: NFS: Revalidate the file mapping on all fatal writeback errors If a write or commit failed, and the mapping sees a fatal error, we need to revalidate the contents of that mapping. Fixes: 06c9fdf3b9f1 ("NFS: On fatal writeback errors, we need to call nfs_inode_remove_request()") Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/write.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/write.c b/fs/nfs/write.c index adedc16780c5..6dd8d6e6d847 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -256,8 +256,11 @@ static void nfs_set_pageerror(struct address_space *mapping) static void nfs_mapping_set_error(struct page *page, int error) { + struct address_space *mapping = page_file_mapping(page); + SetPageError(page); - mapping_set_error(page_file_mapping(page), error); + mapping_set_error(mapping, error); + nfs_set_pageerror(mapping); } /* @@ -600,7 +603,6 @@ release_request: static void nfs_write_error(struct nfs_page *req, int error) { - nfs_set_pageerror(page_file_mapping(req->wb_page)); trace_nfs_write_error(req, error); nfs_mapping_set_error(req->wb_page, error); nfs_inode_remove_request(req); @@ -1007,7 +1009,6 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr) nfs_list_remove_request(req); if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes < bytes)) { - nfs_set_pageerror(page_file_mapping(req->wb_page)); trace_nfs_comp_error(req, hdr->error); nfs_mapping_set_error(req->wb_page, hdr->error); goto remove_req; -- cgit v1.2.3-59-g8ed1b From 2197e9b06c228b65a2cef98ef34d6bf42fa1af3d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:03 -0500 Subject: NFS: Fix up fsync() when the server rebooted Don't clear the NFS_CONTEXT_RESEND_WRITES flag until after calling nfs_commit_inode(). Otherwise, if nfs_commit_inode() returns an error, we end up with dirty pages in the page cache, but no tag to tell us that those pages need resending. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/file.c | 37 ++++++++++++++++--------------------- 1 file changed, 16 insertions(+), 21 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/file.c b/fs/nfs/file.c index ccd9bc098806..f96367a2463e 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -204,44 +204,39 @@ EXPORT_SYMBOL_GPL(nfs_file_mmap); static int nfs_file_fsync_commit(struct file *file, int datasync) { - struct nfs_open_context *ctx = nfs_file_open_context(file); struct inode *inode = file_inode(file); - int do_resend, status; - int ret = 0; + int ret; dprintk("NFS: fsync file(%pD2) datasync %d\n", file, datasync); nfs_inc_stats(inode, NFSIOS_VFSFSYNC); - do_resend = test_and_clear_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags); - status = nfs_commit_inode(inode, FLUSH_SYNC); - if (status == 0) - status = file_check_and_advance_wb_err(file); - if (status < 0) { - ret = status; - goto out; - } - do_resend |= test_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags); - if (do_resend) - ret = -EAGAIN; -out: - return ret; + ret = nfs_commit_inode(inode, FLUSH_SYNC); + if (ret < 0) + return ret; + return file_check_and_advance_wb_err(file); } int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) { - int ret; + struct nfs_open_context *ctx = nfs_file_open_context(file); struct inode *inode = file_inode(file); + int ret; trace_nfs_fsync_enter(inode); - do { + for (;;) { ret = file_write_and_wait_range(file, start, end); if (ret != 0) break; ret = nfs_file_fsync_commit(file, datasync); - if (!ret) - ret = pnfs_sync_inode(inode, !!datasync); + if (ret != 0) + break; + ret = pnfs_sync_inode(inode, !!datasync); + if (ret != 0) + break; + if (!test_and_clear_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags)) + break; /* * If nfs_file_fsync_commit detected a server reboot, then * resend all dirty pages that might have been covered by @@ -249,7 +244,7 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) */ start = 0; end = LLONG_MAX; - } while (ret == -EAGAIN); + } trace_nfs_fsync_exit(inode, ret); return ret; -- cgit v1.2.3-59-g8ed1b From 221203ce6406273cf00e5c6397257d986c003ee6 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:04 -0500 Subject: NFS/pnfs: Fix pnfs_generic_prepare_to_resend_writes() Instead of making assumptions about the commit verifier contents, change the commit code to ensure we always check that the verifier was set by the XDR code. Fixes: f54bcf2ecee9 ("pnfs: Prepare for flexfiles by pulling out common code") Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/direct.c | 4 ++-- fs/nfs/nfs3xdr.c | 5 ++++- fs/nfs/nfs4xdr.c | 5 ++++- fs/nfs/pnfs_nfs.c | 7 +++---- fs/nfs/write.c | 4 +++- 5 files changed, 16 insertions(+), 9 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 040a50fd9bf3..29f00da8a0b7 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -245,10 +245,10 @@ static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq, data->ds_commit_index); /* verifier not set so always fail */ - if (verfp->committed < 0) + if (verfp->committed < 0 || data->res.verf->committed <= NFS_UNSTABLE) return 1; - return nfs_direct_cmp_verf(verfp, &data->verf); + return nfs_direct_cmp_verf(verfp, data->res.verf); } /** diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index 927eb680f161..69971f6c840d 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -2334,6 +2334,7 @@ static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, void *data) { struct nfs_commitres *result = data; + struct nfs_writeverf *verf = result->verf; enum nfs_stat status; int error; @@ -2346,7 +2347,9 @@ static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, result->op_status = status; if (status != NFS3_OK) goto out_status; - error = decode_writeverf3(xdr, &result->verf->verifier); + error = decode_writeverf3(xdr, &verf->verifier); + if (!error) + verf->committed = NFS_FILE_SYNC; out: return error; out_status: diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 8de4d250924b..47817ef0aadb 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4313,11 +4313,14 @@ static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifi static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res) { + struct nfs_writeverf *verf = res->verf; int status; status = decode_op_hdr(xdr, OP_COMMIT); if (!status) - status = decode_write_verifier(xdr, &res->verf->verifier); + status = decode_write_verifier(xdr, &verf->verifier); + if (!status) + verf->committed = NFS_FILE_SYNC; return status; } diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c index 82af4809b869..8b37e7f8e789 100644 --- a/fs/nfs/pnfs_nfs.c +++ b/fs/nfs/pnfs_nfs.c @@ -31,12 +31,11 @@ EXPORT_SYMBOL_GPL(pnfs_generic_rw_release); /* Fake up some data that will cause nfs_commit_release to retry the writes. */ void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data) { - struct nfs_page *first = nfs_list_entry(data->pages.next); + struct nfs_writeverf *verf = data->res.verf; data->task.tk_status = 0; - memcpy(&data->verf.verifier, &first->wb_verf, - sizeof(data->verf.verifier)); - data->verf.verifier.data[0]++; /* ensure verifier mismatch */ + memset(&verf->verifier, 0, sizeof(verf->verifier)); + verf->committed = NFS_UNSTABLE; } EXPORT_SYMBOL_GPL(pnfs_generic_prepare_to_resend_writes); diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 6dd8d6e6d847..c86fc9efd99b 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1840,6 +1840,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata) static void nfs_commit_release_pages(struct nfs_commit_data *data) { + const struct nfs_writeverf *verf = data->res.verf; struct nfs_page *req; int status = data->task.tk_status; struct nfs_commit_info cinfo; @@ -1868,7 +1869,8 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data) /* Okay, COMMIT succeeded, apparently. Check the verifier * returned by the server against all stored verfs. */ - if (!nfs_write_verifier_cmp(&req->wb_verf, &data->verf.verifier)) { + if (verf->committed > NFS_UNSTABLE && + !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier)) { /* We have a match */ if (req->wb_page) nfs_inode_remove_request(req); -- cgit v1.2.3-59-g8ed1b From 25925b00a972e4ec12702483686b48b609e24703 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:05 -0500 Subject: NFSv4: Improve read/write/commit tracing Ensure we always return the number of bytes read/written. Also display the pnfs filehandle if it is in use. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfs4trace.h | 52 ++++++++++++++++++++++++++++++++++------------------ 1 file changed, 34 insertions(+), 18 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index e3586c16ef59..497740f89f00 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -1729,7 +1729,8 @@ DECLARE_EVENT_CLASS(nfs4_read_event, __field(u32, fhandle) __field(u64, fileid) __field(loff_t, offset) - __field(size_t, count) + __field(u32, arg_count) + __field(u32, res_count) __field(unsigned long, error) __field(int, stateid_seq) __field(u32, stateid_hash) @@ -1737,13 +1738,18 @@ DECLARE_EVENT_CLASS(nfs4_read_event, TP_fast_assign( const struct inode *inode = hdr->inode; + const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = hdr->args.fh ? + hdr->args.fh : &nfsi->fh; const struct nfs4_state *state = hdr->args.context->state; + __entry->dev = inode->i_sb->s_dev; - __entry->fileid = NFS_FILEID(inode); - __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->fileid = nfsi->fileid; + __entry->fhandle = nfs_fhandle_hash(fh); __entry->offset = hdr->args.offset; - __entry->count = hdr->args.count; + __entry->arg_count = hdr->args.count; + __entry->res_count = hdr->res.count; __entry->error = error < 0 ? -error : 0; __entry->stateid_seq = be32_to_cpu(state->stateid.seqid); @@ -1753,14 +1759,14 @@ DECLARE_EVENT_CLASS(nfs4_read_event, TP_printk( "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld count=%zu stateid=%d:0x%08x", + "offset=%lld count=%u res=%u stateid=%d:0x%08x", -__entry->error, show_nfsv4_errors(__entry->error), MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, (long long)__entry->offset, - __entry->count, + __entry->arg_count, __entry->res_count, __entry->stateid_seq, __entry->stateid_hash ) ); @@ -1789,7 +1795,8 @@ DECLARE_EVENT_CLASS(nfs4_write_event, __field(u32, fhandle) __field(u64, fileid) __field(loff_t, offset) - __field(size_t, count) + __field(u32, arg_count) + __field(u32, res_count) __field(unsigned long, error) __field(int, stateid_seq) __field(u32, stateid_hash) @@ -1797,13 +1804,18 @@ DECLARE_EVENT_CLASS(nfs4_write_event, TP_fast_assign( const struct inode *inode = hdr->inode; + const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = hdr->args.fh ? + hdr->args.fh : &nfsi->fh; const struct nfs4_state *state = hdr->args.context->state; + __entry->dev = inode->i_sb->s_dev; - __entry->fileid = NFS_FILEID(inode); - __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->fileid = nfsi->fileid; + __entry->fhandle = nfs_fhandle_hash(fh); __entry->offset = hdr->args.offset; - __entry->count = hdr->args.count; + __entry->arg_count = hdr->args.count; + __entry->res_count = hdr->res.count; __entry->error = error < 0 ? -error : 0; __entry->stateid_seq = be32_to_cpu(state->stateid.seqid); @@ -1813,14 +1825,14 @@ DECLARE_EVENT_CLASS(nfs4_write_event, TP_printk( "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld count=%zu stateid=%d:0x%08x", + "offset=%lld count=%u res=%u stateid=%d:0x%08x", -__entry->error, show_nfsv4_errors(__entry->error), MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, (long long)__entry->offset, - __entry->count, + __entry->arg_count, __entry->res_count, __entry->stateid_seq, __entry->stateid_hash ) ); @@ -1849,24 +1861,28 @@ DECLARE_EVENT_CLASS(nfs4_commit_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __field(loff_t, offset) - __field(size_t, count) __field(unsigned long, error) + __field(loff_t, offset) + __field(u32, count) ), TP_fast_assign( const struct inode *inode = data->inode; + const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = data->args.fh ? + data->args.fh : &nfsi->fh; + __entry->dev = inode->i_sb->s_dev; - __entry->fileid = NFS_FILEID(inode); - __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->fileid = nfsi->fileid; + __entry->fhandle = nfs_fhandle_hash(fh); __entry->offset = data->args.offset; __entry->count = data->args.count; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; ), TP_printk( "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld count=%zu", + "offset=%lld count=%u", -__entry->error, show_nfsv4_errors(__entry->error), MAJOR(__entry->dev), MINOR(__entry->dev), -- cgit v1.2.3-59-g8ed1b From 118b6292195cfb86a9f43cb65610fc6d980c65f4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:06 -0500 Subject: NFS: Fix fix of show_nfs_errors Casting a negative value to an unsigned long is not the same as converting it to its absolute value. Fixes: 96650e2effa2 ("NFS: Fix show_nfs_errors macros again") Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfs4trace.h | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index 497740f89f00..99d3c705c00d 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -352,7 +352,7 @@ DECLARE_EVENT_CLASS(nfs4_clientid_event, ), TP_fast_assign( - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __assign_str(dstaddr, clp->cl_hostname); ), @@ -432,7 +432,8 @@ TRACE_EVENT(nfs4_sequence_done, __entry->target_highest_slotid = res->sr_target_highest_slotid; __entry->status_flags = res->sr_status_flags; - __entry->error = res->sr_status; + __entry->error = res->sr_status < 0 ? + -res->sr_status : 0; ), TP_printk( "error=%ld (%s) session=0x%08x slot_nr=%u seq_nr=%u " @@ -640,7 +641,7 @@ TRACE_EVENT(nfs4_state_mgr_failed, ), TP_fast_assign( - __entry->error = status; + __entry->error = status < 0 ? -status : 0; __entry->state = clp->cl_state; __assign_str(hostname, clp->cl_hostname); __assign_str(section, section); @@ -659,7 +660,7 @@ TRACE_EVENT(nfs4_xdr_status, TP_PROTO( const struct xdr_stream *xdr, u32 op, - int error + u32 error ), TP_ARGS(xdr, op, error), @@ -884,7 +885,7 @@ TRACE_EVENT(nfs4_close, __entry->fileid = NFS_FILEID(inode); __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); __entry->fmode = (__force unsigned int)state->state; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->stateid_seq = be32_to_cpu(args->stateid.seqid); __entry->stateid_hash = @@ -949,7 +950,7 @@ DECLARE_EVENT_CLASS(nfs4_lock_event, TP_fast_assign( const struct inode *inode = state->inode; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->cmd = cmd; __entry->type = request->fl_type; __entry->start = request->fl_start; @@ -1021,7 +1022,7 @@ TRACE_EVENT(nfs4_set_lock, TP_fast_assign( const struct inode *inode = state->inode; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->cmd = cmd; __entry->type = request->fl_type; __entry->start = request->fl_start; @@ -1199,7 +1200,7 @@ TRACE_EVENT(nfs4_delegreturn_exit, TP_fast_assign( __entry->dev = res->server->s_dev; __entry->fhandle = nfs_fhandle_hash(args->fhandle); - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->stateid_seq = be32_to_cpu(args->stateid->seqid); __entry->stateid_hash = @@ -1239,7 +1240,7 @@ DECLARE_EVENT_CLASS(nfs4_test_stateid_event, TP_fast_assign( const struct inode *inode = state->inode; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->dev = inode->i_sb->s_dev; __entry->fileid = NFS_FILEID(inode); __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); @@ -1341,7 +1342,7 @@ TRACE_EVENT(nfs4_lookupp, TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = NFS_FILEID(inode); - __entry->error = error; + __entry->error = error < 0 ? -error : 0; ), TP_printk( @@ -1377,7 +1378,7 @@ TRACE_EVENT(nfs4_rename, __entry->dev = olddir->i_sb->s_dev; __entry->olddir = NFS_FILEID(olddir); __entry->newdir = NFS_FILEID(newdir); - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __assign_str(oldname, oldname->name); __assign_str(newname, newname->name); ), @@ -1468,7 +1469,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_event, __entry->dev = inode->i_sb->s_dev; __entry->fileid = NFS_FILEID(inode); __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->stateid_seq = be32_to_cpu(stateid->seqid); __entry->stateid_hash = @@ -1524,7 +1525,7 @@ DECLARE_EVENT_CLASS(nfs4_getattr_event, __entry->valid = fattr->valid; __entry->fhandle = nfs_fhandle_hash(fhandle); __entry->fileid = (fattr->valid & NFS_ATTR_FATTR_FILEID) ? fattr->fileid : 0; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; ), TP_printk( @@ -1571,7 +1572,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, ), TP_fast_assign( - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->fhandle = nfs_fhandle_hash(fhandle); if (!IS_ERR_OR_NULL(inode)) { __entry->fileid = NFS_FILEID(inode); @@ -1628,7 +1629,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, ), TP_fast_assign( - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->fhandle = nfs_fhandle_hash(fhandle); if (!IS_ERR_OR_NULL(inode)) { __entry->fileid = NFS_FILEID(inode); @@ -1947,7 +1948,7 @@ TRACE_EVENT(nfs4_layoutget, __entry->iomode = args->iomode; __entry->offset = args->offset; __entry->count = args->length; - __entry->error = error; + __entry->error = error < 0 ? -error : 0; __entry->stateid_seq = be32_to_cpu(state->stateid.seqid); __entry->stateid_hash = -- cgit v1.2.3-59-g8ed1b From 0722dc9fea58e8199577963bb7601ff9f3e00b0a Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:07 -0500 Subject: pNFS/flexfiles: Record resend attempts on I/O failure If the attempt to do pNFS fails, then record what action we take to recover (resend, reset to pnfs or reset to mds). Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/flexfilelayout/flexfilelayout.c | 6 +++--- fs/nfs/nfs4trace.h | 8 +++++++- fs/nfs/pnfs.h | 8 ++++---- 3 files changed, 14 insertions(+), 8 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 5657b7f2611f..3163b78b1d2c 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -1321,7 +1321,6 @@ static int ff_layout_read_done_cb(struct rpc_task *task, int new_idx = hdr->pgio_mirror_idx; int err; - trace_nfs4_pnfs_read(hdr, task->tk_status); if (task->tk_status < 0) ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, hdr->args.offset, hdr->args.count, @@ -1331,6 +1330,7 @@ static int ff_layout_read_done_cb(struct rpc_task *task, hdr->ds_clp, hdr->lseg, hdr->pgio_mirror_idx); + trace_nfs4_pnfs_read(hdr, err); clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); switch (err) { @@ -1494,7 +1494,6 @@ static int ff_layout_write_done_cb(struct rpc_task *task, loff_t end_offs = 0; int err; - trace_nfs4_pnfs_write(hdr, task->tk_status); if (task->tk_status < 0) ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, hdr->args.offset, hdr->args.count, @@ -1504,6 +1503,7 @@ static int ff_layout_write_done_cb(struct rpc_task *task, hdr->ds_clp, hdr->lseg, hdr->pgio_mirror_idx); + trace_nfs4_pnfs_write(hdr, err); clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); switch (err) { @@ -1537,7 +1537,6 @@ static int ff_layout_commit_done_cb(struct rpc_task *task, { int err; - trace_nfs4_pnfs_commit_ds(data, task->tk_status); if (task->tk_status < 0) ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, data->args.offset, data->args.count, @@ -1546,6 +1545,7 @@ static int ff_layout_commit_done_cb(struct rpc_task *task, err = ff_layout_async_handle_error(task, NULL, data->ds_clp, data->lseg, data->ds_commit_index); + trace_nfs4_pnfs_commit_ds(data, err); switch (err) { case -NFS4ERR_RESET_TO_PNFS: pnfs_generic_prepare_to_resend_writes(data); diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index 99d3c705c00d..c83a7db91e49 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -155,6 +155,9 @@ TRACE_DEFINE_ENUM(NFS4ERR_WRONG_CRED); TRACE_DEFINE_ENUM(NFS4ERR_WRONG_TYPE); TRACE_DEFINE_ENUM(NFS4ERR_XDEV); +TRACE_DEFINE_ENUM(NFS4ERR_RESET_TO_MDS); +TRACE_DEFINE_ENUM(NFS4ERR_RESET_TO_PNFS); + #define show_nfsv4_errors(error) \ __print_symbolic(error, \ { NFS4_OK, "OK" }, \ @@ -305,7 +308,10 @@ TRACE_DEFINE_ENUM(NFS4ERR_XDEV); { NFS4ERR_WRONGSEC, "WRONGSEC" }, \ { NFS4ERR_WRONG_CRED, "WRONG_CRED" }, \ { NFS4ERR_WRONG_TYPE, "WRONG_TYPE" }, \ - { NFS4ERR_XDEV, "XDEV" }) + { NFS4ERR_XDEV, "XDEV" }, \ + /* ***** Internal to Linux NFS client ***** */ \ + { NFS4ERR_RESET_TO_MDS, "RESET_TO_MDS" }, \ + { NFS4ERR_RESET_TO_PNFS, "RESET_TO_PNFS" }) #define show_open_flags(flags) \ __print_flags(flags, "|", \ diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index f8a38065c7e4..0fafdadc9c8d 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -79,6 +79,10 @@ enum pnfs_try_status { PNFS_TRY_AGAIN = 2, }; +/* error codes for internal use */ +#define NFS4ERR_RESET_TO_MDS 12001 +#define NFS4ERR_RESET_TO_PNFS 12002 + #ifdef CONFIG_NFS_V4_1 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" @@ -91,10 +95,6 @@ enum pnfs_try_status { #define NFS4_DEF_DS_RETRANS 5 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) -/* error codes for internal use */ -#define NFS4ERR_RESET_TO_MDS 12001 -#define NFS4ERR_RESET_TO_PNFS 12002 - enum { NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ -- cgit v1.2.3-59-g8ed1b From 2343172d34c6296f79b404a0eb291e15ab19e5ca Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:08 -0500 Subject: NFS: Clean up generic file read tracepoints Clean up the generic file read tracepoints so they do pass the full structures as arguments. Also ensure we report the number of bytes actually read. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfstrace.h | 56 ++++++++++++++++++++++++++++++++----------------------- fs/nfs/read.c | 5 ++--- 2 files changed, 35 insertions(+), 26 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index 4d6eb1703943..0710b91f82d3 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -820,75 +820,85 @@ TRACE_EVENT(nfs_sillyrename_unlink, TRACE_EVENT(nfs_initiate_read, TP_PROTO( - const struct inode *inode, - loff_t offset, unsigned long count + const struct nfs_pgio_header *hdr ), - TP_ARGS(inode, offset, count), + TP_ARGS(hdr), TP_STRUCT__entry( - __field(loff_t, offset) - __field(unsigned long, count) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) + __field(loff_t, offset) + __field(u32, count) ), TP_fast_assign( + const struct inode *inode = hdr->inode; const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = hdr->args.fh ? + hdr->args.fh : &nfsi->fh; - __entry->offset = offset; - __entry->count = count; + __entry->offset = hdr->args.offset; + __entry->count = hdr->args.count; __entry->dev = inode->i_sb->s_dev; __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->fhandle = nfs_fhandle_hash(fh); ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld count=%lu", + "offset=%lld count=%u", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, - __entry->offset, __entry->count + (long long)__entry->offset, __entry->count ) ); TRACE_EVENT(nfs_readpage_done, TP_PROTO( - const struct inode *inode, - int status, loff_t offset, bool eof + const struct rpc_task *task, + const struct nfs_pgio_header *hdr ), - TP_ARGS(inode, status, offset, eof), + TP_ARGS(task, hdr), TP_STRUCT__entry( - __field(int, status) - __field(loff_t, offset) - __field(bool, eof) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) + __field(loff_t, offset) + __field(u32, arg_count) + __field(u32, res_count) + __field(bool, eof) + __field(int, status) ), TP_fast_assign( + const struct inode *inode = hdr->inode; const struct nfs_inode *nfsi = NFS_I(inode); - - __entry->status = status; - __entry->offset = offset; - __entry->eof = eof; + const struct nfs_fh *fh = hdr->args.fh ? + hdr->args.fh : &nfsi->fh; + + __entry->status = task->tk_status; + __entry->offset = hdr->args.offset; + __entry->arg_count = hdr->args.count; + __entry->res_count = hdr->res.count; + __entry->eof = hdr->res.eof; __entry->dev = inode->i_sb->s_dev; __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->fhandle = nfs_fhandle_hash(fh); ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld status=%d%s", + "offset=%lld count=%u res=%u status=%d%s", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, - __entry->offset, __entry->status, + (long long)__entry->offset, __entry->arg_count, + __entry->res_count, __entry->status, __entry->eof ? " eof" : "" ) ); diff --git a/fs/nfs/read.c b/fs/nfs/read.c index cfe0b586eadd..12deb3bdb2a0 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -214,7 +214,7 @@ static void nfs_initiate_read(struct nfs_pgio_header *hdr, task_setup_data->flags |= swap_flags; rpc_ops->read_setup(hdr, msg); - trace_nfs_initiate_read(inode, hdr->io_start, hdr->good_bytes); + trace_nfs_initiate_read(hdr); } static void @@ -247,8 +247,7 @@ static int nfs_readpage_done(struct rpc_task *task, return status; nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, hdr->res.count); - trace_nfs_readpage_done(inode, task->tk_status, - hdr->args.offset, hdr->res.eof); + trace_nfs_readpage_done(task, hdr); if (task->tk_status == -ESTALE) { set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); -- cgit v1.2.3-59-g8ed1b From 5bb2a7cb9fe58d2b1efedd6058d442c7871c45ec Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:09 -0500 Subject: NFS: Clean up generic writeback tracepoints Clean up the generic writeback tracepoints so they do pass the full structures as arguments. Also ensure we report the number of bytes actually written. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfstrace.h | 73 +++++++++++++++++++++++++++++++------------------------ fs/nfs/write.c | 6 ++--- 2 files changed, 43 insertions(+), 36 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index 0710b91f82d3..7ed75b3b7aac 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -915,87 +915,96 @@ TRACE_DEFINE_ENUM(NFS_FILE_SYNC); TRACE_EVENT(nfs_initiate_write, TP_PROTO( - const struct inode *inode, - loff_t offset, unsigned long count, - enum nfs3_stable_how stable + const struct nfs_pgio_header *hdr ), - TP_ARGS(inode, offset, count, stable), + TP_ARGS(hdr), TP_STRUCT__entry( - __field(loff_t, offset) - __field(unsigned long, count) - __field(enum nfs3_stable_how, stable) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) + __field(loff_t, offset) + __field(u32, count) + __field(enum nfs3_stable_how, stable) ), TP_fast_assign( + const struct inode *inode = hdr->inode; const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = hdr->args.fh ? + hdr->args.fh : &nfsi->fh; - __entry->offset = offset; - __entry->count = count; - __entry->stable = stable; + __entry->offset = hdr->args.offset; + __entry->count = hdr->args.count; + __entry->stable = hdr->args.stable; __entry->dev = inode->i_sb->s_dev; __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->fhandle = nfs_fhandle_hash(fh); ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld count=%lu stable=%s", + "offset=%lld count=%u stable=%s", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, - __entry->offset, __entry->count, + (long long)__entry->offset, __entry->count, nfs_show_stable(__entry->stable) ) ); TRACE_EVENT(nfs_writeback_done, TP_PROTO( - const struct inode *inode, - int status, - loff_t offset, - struct nfs_writeverf *writeverf + const struct rpc_task *task, + const struct nfs_pgio_header *hdr ), - TP_ARGS(inode, status, offset, writeverf), + TP_ARGS(task, hdr), TP_STRUCT__entry( - __field(int, status) - __field(loff_t, offset) - __field(enum nfs3_stable_how, stable) - __field(unsigned long long, verifier) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) + __field(loff_t, offset) + __field(u32, arg_count) + __field(u32, res_count) + __field(int, status) + __field(enum nfs3_stable_how, stable) + __array(char, verifier, NFS4_VERIFIER_SIZE) ), TP_fast_assign( + const struct inode *inode = hdr->inode; const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = hdr->args.fh ? + hdr->args.fh : &nfsi->fh; + const struct nfs_writeverf *verf = hdr->res.verf; - __entry->status = status; - __entry->offset = offset; - __entry->stable = writeverf->committed; - memcpy(&__entry->verifier, &writeverf->verifier, - sizeof(__entry->verifier)); + __entry->status = task->tk_status; + __entry->offset = hdr->args.offset; + __entry->arg_count = hdr->args.count; + __entry->res_count = hdr->res.count; + __entry->stable = verf->committed; + memcpy(__entry->verifier, + &verf->verifier, + NFS4_VERIFIER_SIZE); __entry->dev = inode->i_sb->s_dev; __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->fhandle = nfs_fhandle_hash(fh); ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld status=%d stable=%s " - "verifier 0x%016llx", + "offset=%lld count=%u res=%u status=%d stable=%s " + "verifier=%s", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, - __entry->offset, __entry->status, + (long long)__entry->offset, __entry->arg_count, + __entry->res_count, __entry->status, nfs_show_stable(__entry->stable), - __entry->verifier + __print_hex_str(__entry->verifier, NFS4_VERIFIER_SIZE) ) ); diff --git a/fs/nfs/write.c b/fs/nfs/write.c index c86fc9efd99b..cd837744a732 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1414,8 +1414,7 @@ static void nfs_initiate_write(struct nfs_pgio_header *hdr, task_setup_data->priority = priority; rpc_ops->write_setup(hdr, msg, &task_setup_data->rpc_client); - trace_nfs_initiate_write(hdr->inode, hdr->io_start, hdr->good_bytes, - hdr->args.stable); + trace_nfs_initiate_write(hdr); } /* If a nfs_flush_* function fails, it should remove reqs from @head and @@ -1579,8 +1578,7 @@ static int nfs_writeback_done(struct rpc_task *task, return status; nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, hdr->res.count); - trace_nfs_writeback_done(inode, task->tk_status, - hdr->args.offset, hdr->res.verf); + trace_nfs_writeback_done(task, hdr); if (hdr->res.verf->committed < hdr->args.stable && task->tk_status >= 0) { -- cgit v1.2.3-59-g8ed1b From 7bdd297ea6e695f27be67cb99b1fea1ff83e38e4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:10 -0500 Subject: NFS: Clean up generic file commit tracepoint Clean up the generic file commit tracepoints to use a 64-bit value for the verifier, and to display the pNFS filehandle, if it exists. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfstrace.h | 42 ++++++++++++++++++++++++++---------------- fs/nfs/write.c | 2 +- 2 files changed, 27 insertions(+), 17 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index 7ed75b3b7aac..a543573e038f 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -1061,71 +1061,81 @@ TRACE_EVENT(nfs_initiate_commit, TP_ARGS(data), TP_STRUCT__entry( - __field(loff_t, offset) - __field(unsigned long, count) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) + __field(loff_t, offset) + __field(u32, count) ), TP_fast_assign( const struct inode *inode = data->inode; const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = data->args.fh ? + data->args.fh : &nfsi->fh; __entry->offset = data->args.offset; __entry->count = data->args.count; __entry->dev = inode->i_sb->s_dev; __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->fhandle = nfs_fhandle_hash(fh); ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld count=%lu", + "offset=%lld count=%u", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, - __entry->offset, __entry->count + (long long)__entry->offset, __entry->count ) ); TRACE_EVENT(nfs_commit_done, TP_PROTO( + const struct rpc_task *task, const struct nfs_commit_data *data ), - TP_ARGS(data), + TP_ARGS(task, data), TP_STRUCT__entry( - __field(int, status) - __field(loff_t, offset) - __field(unsigned long long, verifier) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) + __field(loff_t, offset) + __field(int, status) + __field(enum nfs3_stable_how, stable) + __array(char, verifier, NFS4_VERIFIER_SIZE) ), TP_fast_assign( const struct inode *inode = data->inode; const struct nfs_inode *nfsi = NFS_I(inode); + const struct nfs_fh *fh = data->args.fh ? + data->args.fh : &nfsi->fh; + const struct nfs_writeverf *verf = data->res.verf; - __entry->status = data->res.op_status; + __entry->status = task->tk_status; __entry->offset = data->args.offset; - memcpy(&__entry->verifier, &data->verf.verifier, - sizeof(__entry->verifier)); + __entry->stable = verf->committed; + memcpy(__entry->verifier, + &verf->verifier, + NFS4_VERIFIER_SIZE); __entry->dev = inode->i_sb->s_dev; __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->fhandle = nfs_fhandle_hash(fh); ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld status=%d verifier 0x%016llx", + "offset=%lld status=%d stable=%s verifier=%s", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, - __entry->offset, __entry->status, - __entry->verifier + (long long)__entry->offset, __entry->status, + nfs_show_stable(__entry->stable), + __print_hex_str(__entry->verifier, NFS4_VERIFIER_SIZE) ) ); diff --git a/fs/nfs/write.c b/fs/nfs/write.c index cd837744a732..83f92a4d65dc 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1833,7 +1833,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata) /* Call the NFS version-specific code */ NFS_PROTO(data->inode)->commit_done(task, data); - trace_nfs_commit_done(data); + trace_nfs_commit_done(task, data); } static void nfs_commit_release_pages(struct nfs_commit_data *data) -- cgit v1.2.3-59-g8ed1b From 088f3e68d899eb0b1fc184b0a2f947a5c91031fb Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:11 -0500 Subject: pNFS/flexfiles: Add tracing for layout errors Trace layout errors for pNFS/flexfiles on read/write/commit operations. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/flexfilelayout/flexfilelayout.c | 28 ++++++--- fs/nfs/nfs4trace.c | 4 ++ fs/nfs/nfs4trace.h | 109 +++++++++++++++++++++++++++++++++ 3 files changed, 132 insertions(+), 9 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 3163b78b1d2c..bb9148b83166 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -1266,9 +1266,10 @@ static int ff_layout_async_handle_error(struct rpc_task *task, static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, int idx, u64 offset, u64 length, - u32 status, int opnum, int error) + u32 *op_status, int opnum, int error) { struct nfs4_ff_layout_mirror *mirror; + u32 status = *op_status; int err; if (status == 0) { @@ -1286,10 +1287,10 @@ static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, case -ENOBUFS: case -EPIPE: case -EPERM: - status = NFS4ERR_NXIO; + *op_status = status = NFS4ERR_NXIO; break; case -EACCES: - status = NFS4ERR_ACCESS; + *op_status = status = NFS4ERR_ACCESS; break; default: return; @@ -1321,11 +1322,14 @@ static int ff_layout_read_done_cb(struct rpc_task *task, int new_idx = hdr->pgio_mirror_idx; int err; - if (task->tk_status < 0) + if (task->tk_status < 0) { ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, hdr->args.offset, hdr->args.count, - hdr->res.op_status, OP_READ, + &hdr->res.op_status, OP_READ, task->tk_status); + trace_ff_layout_read_error(hdr); + } + err = ff_layout_async_handle_error(task, hdr->args.context->state, hdr->ds_clp, hdr->lseg, hdr->pgio_mirror_idx); @@ -1494,11 +1498,14 @@ static int ff_layout_write_done_cb(struct rpc_task *task, loff_t end_offs = 0; int err; - if (task->tk_status < 0) + if (task->tk_status < 0) { ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, hdr->args.offset, hdr->args.count, - hdr->res.op_status, OP_WRITE, + &hdr->res.op_status, OP_WRITE, task->tk_status); + trace_ff_layout_write_error(hdr); + } + err = ff_layout_async_handle_error(task, hdr->args.context->state, hdr->ds_clp, hdr->lseg, hdr->pgio_mirror_idx); @@ -1537,11 +1544,14 @@ static int ff_layout_commit_done_cb(struct rpc_task *task, { int err; - if (task->tk_status < 0) + if (task->tk_status < 0) { ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, data->args.offset, data->args.count, - data->res.op_status, OP_COMMIT, + &data->res.op_status, OP_COMMIT, task->tk_status); + trace_ff_layout_commit_error(data); + } + err = ff_layout_async_handle_error(task, NULL, data->ds_clp, data->lseg, data->ds_commit_index); diff --git a/fs/nfs/nfs4trace.c b/fs/nfs/nfs4trace.c index 1a8f376b3f73..d9ac556bebcf 100644 --- a/fs/nfs/nfs4trace.c +++ b/fs/nfs/nfs4trace.c @@ -24,4 +24,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(pnfs_mds_fallback_read_done); EXPORT_TRACEPOINT_SYMBOL_GPL(pnfs_mds_fallback_write_done); EXPORT_TRACEPOINT_SYMBOL_GPL(pnfs_mds_fallback_read_pagelist); EXPORT_TRACEPOINT_SYMBOL_GPL(pnfs_mds_fallback_write_pagelist); + +EXPORT_TRACEPOINT_SYMBOL_GPL(ff_layout_read_error); +EXPORT_TRACEPOINT_SYMBOL_GPL(ff_layout_write_error); +EXPORT_TRACEPOINT_SYMBOL_GPL(ff_layout_commit_error); #endif diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index c83a7db91e49..1e97e5e04cb4 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -2152,6 +2152,115 @@ DEFINE_PNFS_LAYOUT_EVENT(pnfs_mds_fallback_write_done); DEFINE_PNFS_LAYOUT_EVENT(pnfs_mds_fallback_read_pagelist); DEFINE_PNFS_LAYOUT_EVENT(pnfs_mds_fallback_write_pagelist); +DECLARE_EVENT_CLASS(nfs4_flexfiles_io_event, + TP_PROTO( + const struct nfs_pgio_header *hdr + ), + + TP_ARGS(hdr), + + TP_STRUCT__entry( + __field(unsigned long, error) + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(loff_t, offset) + __field(u32, count) + __field(int, stateid_seq) + __field(u32, stateid_hash) + __string(dstaddr, hdr->ds_clp ? + rpc_peeraddr2str(hdr->ds_clp->cl_rpcclient, + RPC_DISPLAY_ADDR) : "unknown") + ), + + TP_fast_assign( + const struct inode *inode = hdr->inode; + + __entry->error = hdr->res.op_status; + __entry->fhandle = nfs_fhandle_hash(hdr->args.fh); + __entry->fileid = NFS_FILEID(inode); + __entry->dev = inode->i_sb->s_dev; + __entry->offset = hdr->args.offset; + __entry->count = hdr->args.count; + __entry->stateid_seq = + be32_to_cpu(hdr->args.stateid.seqid); + __entry->stateid_hash = + nfs_stateid_hash(&hdr->args.stateid); + __assign_str(dstaddr, hdr->ds_clp ? + rpc_peeraddr2str(hdr->ds_clp->cl_rpcclient, + RPC_DISPLAY_ADDR) : "unknown"); + ), + + TP_printk( + "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "offset=%llu count=%u stateid=%d:0x%08x dstaddr=%s", + -__entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + __entry->offset, __entry->count, + __entry->stateid_seq, __entry->stateid_hash, + __get_str(dstaddr) + ) +); + +#define DEFINE_NFS4_FLEXFILES_IO_EVENT(name) \ + DEFINE_EVENT(nfs4_flexfiles_io_event, name, \ + TP_PROTO( \ + const struct nfs_pgio_header *hdr \ + ), \ + TP_ARGS(hdr)) +DEFINE_NFS4_FLEXFILES_IO_EVENT(ff_layout_read_error); +DEFINE_NFS4_FLEXFILES_IO_EVENT(ff_layout_write_error); + +TRACE_EVENT(ff_layout_commit_error, + TP_PROTO( + const struct nfs_commit_data *data + ), + + TP_ARGS(data), + + TP_STRUCT__entry( + __field(unsigned long, error) + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(loff_t, offset) + __field(u32, count) + __string(dstaddr, data->ds_clp ? + rpc_peeraddr2str(data->ds_clp->cl_rpcclient, + RPC_DISPLAY_ADDR) : "unknown") + ), + + TP_fast_assign( + const struct inode *inode = data->inode; + + __entry->error = data->res.op_status; + __entry->fhandle = nfs_fhandle_hash(data->args.fh); + __entry->fileid = NFS_FILEID(inode); + __entry->dev = inode->i_sb->s_dev; + __entry->offset = data->args.offset; + __entry->count = data->args.count; + __assign_str(dstaddr, data->ds_clp ? + rpc_peeraddr2str(data->ds_clp->cl_rpcclient, + RPC_DISPLAY_ADDR) : "unknown"); + ), + + TP_printk( + "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "offset=%llu count=%u dstaddr=%s", + -__entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + __entry->offset, __entry->count, + __get_str(dstaddr) + ) +); + + #endif /* CONFIG_NFS_V4_1 */ #endif /* _TRACE_NFS4_H */ -- cgit v1.2.3-59-g8ed1b From e8194b7dd39ec5423c32a43542f8348a9bd6956f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:12 -0500 Subject: NFS: Improve tracing of permission calls On exit from nfs_do_access(), record the mask representing the requested permissions, as well as the server-supplied set of access rights for this user. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 4 ++-- fs/nfs/nfstrace.h | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 62 insertions(+), 3 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index e180033e35cf..372c16b3042c 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -2476,7 +2476,7 @@ static int nfs_do_access(struct inode *inode, const struct cred *cred, int mask) { struct nfs_access_entry cache; bool may_block = (mask & MAY_NOT_BLOCK) == 0; - int cache_mask; + int cache_mask = -1; int status; trace_nfs_access_enter(inode); @@ -2515,7 +2515,7 @@ out_cached: if ((mask & ~cache_mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) != 0) status = -EACCES; out: - trace_nfs_access_exit(inode, status); + trace_nfs_access_exit(inode, mask, cache_mask, status); return status; } diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index a543573e038f..f8d677dd6705 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -198,7 +198,66 @@ DEFINE_NFS_INODE_EVENT_DONE(nfs_writeback_inode_exit); DEFINE_NFS_INODE_EVENT(nfs_fsync_enter); DEFINE_NFS_INODE_EVENT_DONE(nfs_fsync_exit); DEFINE_NFS_INODE_EVENT(nfs_access_enter); -DEFINE_NFS_INODE_EVENT_DONE(nfs_access_exit); + +TRACE_EVENT(nfs_access_exit, + TP_PROTO( + const struct inode *inode, + unsigned int mask, + unsigned int permitted, + int error + ), + + TP_ARGS(inode, mask, permitted, error), + + TP_STRUCT__entry( + __field(unsigned long, error) + __field(dev_t, dev) + __field(u32, fhandle) + __field(unsigned char, type) + __field(u64, fileid) + __field(u64, version) + __field(loff_t, size) + __field(unsigned long, nfsi_flags) + __field(unsigned long, cache_validity) + __field(unsigned int, mask) + __field(unsigned int, permitted) + ), + + TP_fast_assign( + const struct nfs_inode *nfsi = NFS_I(inode); + __entry->error = error < 0 ? -error : 0; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = nfsi->fileid; + __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->type = nfs_umode_to_dtype(inode->i_mode); + __entry->version = inode_peek_iversion_raw(inode); + __entry->size = i_size_read(inode); + __entry->nfsi_flags = nfsi->flags; + __entry->cache_validity = nfsi->cache_validity; + __entry->mask = mask; + __entry->permitted = permitted; + ), + + TP_printk( + "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "type=%u (%s) version=%llu size=%lld " + "cache_validity=0x%lx (%s) nfs_flags=0x%lx (%s) " + "mask=0x%x permitted=0x%x", + -__entry->error, nfs_show_status(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + __entry->type, + nfs_show_file_type(__entry->type), + (unsigned long long)__entry->version, + (long long)__entry->size, + __entry->cache_validity, + nfs_show_cache_validity(__entry->cache_validity), + __entry->nfsi_flags, + nfs_show_nfsi_flags(__entry->nfsi_flags), + __entry->mask, __entry->permitted + ) +); TRACE_DEFINE_ENUM(LOOKUP_FOLLOW); TRACE_DEFINE_ENUM(LOOKUP_DIRECTORY); -- cgit v1.2.3-59-g8ed1b From 8c9cb71491e7fd3ebee90d9799c9ca5b769bd0f4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:13 -0500 Subject: NFS: When resending after a short write, reset the reply count to zero If we're resending a write due to a short read or write, ensure we reset the reply count to zero. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/read.c | 2 ++ fs/nfs/write.c | 2 ++ 2 files changed, 4 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 12deb3bdb2a0..34bb9add2302 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -281,6 +281,8 @@ static void nfs_readpage_retry(struct rpc_task *task, argp->offset += resp->count; argp->pgbase += resp->count; argp->count -= resp->count; + resp->count = 0; + resp->eof = 0; rpc_restart_call_prepare(task); } diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 83f92a4d65dc..c478b772cc49 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1658,6 +1658,8 @@ static void nfs_writeback_result(struct rpc_task *task, */ argp->stable = NFS_FILE_SYNC; } + resp->count = 0; + resp->verf->committed = 0; rpc_restart_call_prepare(task); } } -- cgit v1.2.3-59-g8ed1b From 4daaeba938228f7c97e80817ccda1e091c7d3fb6 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:25:14 -0500 Subject: NFS: Fix nfs_direct_write_reschedule_io() The 'hdr->good_bytes' is defined as the number of bytes we expect to read or write starting at offset hdr->io_start. In the case of a partial read/write we may end up adjusting hdr->args.offset and hdr->args.count to skip I/O for data that was already read/written, and so we must ensure the calculation takes that into account. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/direct.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 29f00da8a0b7..b768a0b42e82 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -824,7 +824,8 @@ static void nfs_direct_write_reschedule_io(struct nfs_pgio_header *hdr) dreq->flags = NFS_ODIRECT_RESCHED_WRITES; /* fake unstable write to let common nfs resend pages */ hdr->verf.committed = NFS_UNSTABLE; - hdr->good_bytes = hdr->args.count; + hdr->good_bytes = hdr->args.offset + hdr->args.count - + hdr->io_start; } spin_unlock(&dreq->lock); } -- cgit v1.2.3-59-g8ed1b From 5c965db86e6b0e90a3112228820598e824920278 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:39:36 -0500 Subject: NFS: Trust cached access if we've already revalidated the inode once If we've already revalidated the inode once then don't distrust the access cache unless the NFS_INO_INVALID_ACCESS flag is actually set. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 372c16b3042c..9405eeadc3f3 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -2312,11 +2312,11 @@ static int nfs_access_get_cached(struct inode *inode, const struct cred *cred, s /* Found an entry, is our attribute cache valid? */ if (!nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS)) break; + if (!retry) + break; err = -ECHILD; if (!may_block) goto out; - if (!retry) - goto out_zap; spin_unlock(&inode->i_lock); err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); if (err) -- cgit v1.2.3-59-g8ed1b From c74dfe97c104bda5144bfa8193d8e5ea67d5da7f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 6 Jan 2020 15:39:37 -0500 Subject: NFS: Add mount option 'softreval' Add a mount option 'softreval' that allows attribute revalidation 'getattr' calls to time out, and causes them to fall back to using the cached attributes. The use case for this option is for ensuring that we can still (slowly) traverse paths and use cached information even when the server is down. Once the server comes back up again, the getattr calls start succeeding, and the caches will revalidate as usual. The 'softreval' mount option is automatically enabled if you have specified 'softerr'. It can be turned off using the options 'nosoftreval', or 'hard'. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 14 ++++++++++++-- fs/nfs/inode.c | 8 +++++++- fs/nfs/nfs3proc.c | 7 ++++++- fs/nfs/nfs4proc.c | 33 ++++++++++++++++++++++++++------- fs/nfs/proc.c | 7 ++++++- fs/nfs/super.c | 1 + include/linux/nfs_fs_sb.h | 1 + 7 files changed, 59 insertions(+), 12 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 429315c011ae..0247dcb7b316 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -73,6 +73,7 @@ enum nfs_param { Opt_sloppy, Opt_soft, Opt_softerr, + Opt_softreval, Opt_source, Opt_tcp, Opt_timeo, @@ -128,6 +129,7 @@ static const struct fs_parameter_spec nfs_param_specs[] = { fsparam_flag ("sloppy", Opt_sloppy), fsparam_flag ("soft", Opt_soft), fsparam_flag ("softerr", Opt_softerr), + fsparam_flag ("softreval", Opt_softreval), fsparam_string("source", Opt_source), fsparam_flag ("tcp", Opt_tcp), fsparam_u32 ("timeo", Opt_timeo), @@ -460,11 +462,19 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, ctx->flags &= ~NFS_MOUNT_SOFTERR; break; case Opt_softerr: - ctx->flags |= NFS_MOUNT_SOFTERR; + ctx->flags |= NFS_MOUNT_SOFTERR | NFS_MOUNT_SOFTREVAL; ctx->flags &= ~NFS_MOUNT_SOFT; break; case Opt_hard: - ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); + ctx->flags &= ~(NFS_MOUNT_SOFT | + NFS_MOUNT_SOFTERR | + NFS_MOUNT_SOFTREVAL); + break; + case Opt_softreval: + if (result.negated) + ctx->flags &= ~NFS_MOUNT_SOFTREVAL; + else + ctx->flags &= NFS_MOUNT_SOFTREVAL; break; case Opt_posix: if (result.negated) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index b0b4b9f303fd..71dfc9d2fc3d 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1156,7 +1156,13 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode), status); - if (status == -ESTALE) { + switch (status) { + case -ETIMEDOUT: + /* A soft timeout occurred. Use cached information? */ + if (server->flags & NFS_MOUNT_SOFTREVAL) + status = 0; + break; + case -ESTALE: nfs_zap_caches(inode); if (!S_ISDIR(inode->i_mode)) set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 67a05f35bb89..19f3d1b2807e 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -110,10 +110,15 @@ nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = fattr, }; int status; + unsigned short task_flags = 0; + + /* Is this is an attribute revalidation, subject to softreval? */ + if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) + task_flags |= RPC_TASK_TIMEOUT; dprintk("NFS call getattr\n"); nfs_fattr_init(fattr); - status = rpc_call_sync(server->client, &msg, 0); + status = rpc_call_sync(server->client, &msg, task_flags); dprintk("NFS reply getattr: %d\n", status); return status; } diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 904335b91b6a..294d27be3868 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1097,11 +1097,12 @@ static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) return ret; } -static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, - struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res) +static int nfs4_do_call_sync(struct rpc_clnt *clnt, + struct nfs_server *server, + struct rpc_message *msg, + struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res, + unsigned short task_flags) { struct nfs_client *clp = server->nfs_client; struct nfs4_call_sync_data data = { @@ -1113,12 +1114,23 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, .rpc_client = clnt, .rpc_message = msg, .callback_ops = clp->cl_mvops->call_sync_ops, - .callback_data = &data + .callback_data = &data, + .flags = task_flags, }; return nfs4_call_sync_custom(&task_setup); } +static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, + struct nfs_server *server, + struct rpc_message *msg, + struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res) +{ + return nfs4_do_call_sync(clnt, server, msg, args, res, 0); +} + + int nfs4_call_sync(struct rpc_clnt *clnt, struct nfs_server *server, struct rpc_message *msg, @@ -4064,11 +4076,18 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_argp = &args, .rpc_resp = &res, }; + unsigned short task_flags = 0; + + /* Is this is an attribute revalidation, subject to softreval? */ + if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) + task_flags |= RPC_TASK_TIMEOUT; nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); nfs_fattr_init(fattr); - return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); + return nfs4_do_call_sync(server->client, server, &msg, + &args.seq_args, &res.seq_res, task_flags); } int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 44a15523bf40..0451a094e89e 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -108,10 +108,15 @@ nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = fattr, }; int status; + unsigned short task_flags = 0; + + /* Is this is an attribute revalidation, subject to softreval? */ + if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) + task_flags |= RPC_TASK_TIMEOUT; dprintk("NFS call getattr\n"); nfs_fattr_init(fattr); - status = rpc_call_sync(server->client, &msg, 0); + status = rpc_call_sync(server->client, &msg, task_flags); dprintk("NFS reply getattr: %d\n", status); return status; } diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 76e0198adcfa..dada09b391c6 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -375,6 +375,7 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, } nfs_info[] = { { NFS_MOUNT_SOFT, ",soft", "" }, { NFS_MOUNT_SOFTERR, ",softerr", "" }, + { NFS_MOUNT_SOFTREVAL, ",softreval", "" }, { NFS_MOUNT_POSIX, ",posix", "" }, { NFS_MOUNT_NOCTO, ",nocto", "" }, { NFS_MOUNT_NOAC, ",noac", "" }, diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index c176f705bf98..465fa98258a3 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -152,6 +152,7 @@ struct nfs_server { #define NFS_MOUNT_LOCAL_FLOCK 0x100000 #define NFS_MOUNT_LOCAL_FCNTL 0x200000 #define NFS_MOUNT_SOFTERR 0x400000 +#define NFS_MOUNT_SOFTREVAL 0x800000 unsigned int caps; /* server capabilities */ unsigned int rsize; /* read size */ -- cgit v1.2.3-59-g8ed1b From 62a1573fcf844a559a79bec2eafc4309f2be5c5b Mon Sep 17 00:00:00 2001 From: Olga Kornievskaia Date: Thu, 2 Jan 2020 17:09:54 -0500 Subject: NFSv4 fix acl retrieval over krb5i/krb5p mounts For the krb5i and krb5p mount, it was problematic to truncate the received ACL to the provided buffer because an integrity check could not be preformed. Instead, provide enough pages to accommodate the largest buffer bounded by the largest RPC receive buffer size. Note: I don't think it's possible for the ACL to be truncated now. Thus NFS4_ACL_TRUNC flag and related code could be possibly removed but since I'm unsure, I'm leaving it. v2: needs +1 page. Signed-off-by: Olga Kornievskaia Signed-off-by: Anna Schumaker --- fs/nfs/nfs4proc.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 294d27be3868..22175b85b586 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5601,10 +5601,9 @@ out: */ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) { - struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, }; + struct page **pages; struct nfs_getaclargs args = { .fh = NFS_FH(inode), - .acl_pages = pages, .acl_len = buflen, }; struct nfs_getaclres res = { @@ -5615,11 +5614,19 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu .rpc_argp = &args, .rpc_resp = &res, }; - unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; + unsigned int npages; int ret = -ENOMEM, i; + struct nfs_server *server = NFS_SERVER(inode); - if (npages > ARRAY_SIZE(pages)) - return -ERANGE; + if (buflen == 0) + buflen = server->rsize; + + npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; + pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); + if (!pages) + return -ENOMEM; + + args.acl_pages = pages; for (i = 0; i < npages; i++) { pages[i] = alloc_page(GFP_KERNEL); @@ -5665,6 +5672,7 @@ out_free: __free_page(pages[i]); if (res.acl_scratch) __free_page(res.acl_scratch); + kfree(pages); return ret; } -- cgit v1.2.3-59-g8ed1b From d826e5b827641ae1bebb33d23a774f4e9bb8e94f Mon Sep 17 00:00:00 2001 From: Olga Kornievskaia Date: Wed, 18 Dec 2019 16:50:42 -0500 Subject: NFSv4.x recover from pre-mature loss of openstateid Ever since the commit 0e0cb35b417f, it's possible to lose an open stateid while retrying a CLOSE due to ERR_OLD_STATEID. Once that happens, operations that require openstateid fail with EAGAIN which is propagated to the application then tests like generic/446 and generic/168 fail with "Resource temporarily unavailable". Instead of returning this error, initiate state recovery when possible to recover the open stateid and then try calling nfs4_select_rw_stateid() again. Fixes: 0e0cb35b417f ("NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE") Signed-off-by: Olga Kornievskaia Signed-off-by: Anna Schumaker --- fs/nfs/nfs42proc.c | 36 ++++++++++++++++++++++++++++-------- fs/nfs/nfs4proc.c | 2 ++ fs/nfs/pnfs.c | 2 -- 3 files changed, 30 insertions(+), 10 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 1fe83e0f663e..9637aad36bdc 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -61,8 +61,11 @@ static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, lock, FMODE_WRITE); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; + } res.falloc_fattr = nfs_alloc_fattr(); if (!res.falloc_fattr) @@ -287,8 +290,11 @@ static ssize_t _nfs42_proc_copy(struct file *src, } else { status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context, src_lock, FMODE_READ); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; + } } status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping, pos_src, pos_src + (loff_t)count - 1); @@ -297,8 +303,11 @@ static ssize_t _nfs42_proc_copy(struct file *src, status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context, dst_lock, FMODE_WRITE); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; + } status = nfs_sync_inode(dst_inode); if (status) @@ -546,8 +555,11 @@ static int _nfs42_proc_copy_notify(struct file *src, struct file *dst, status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx, FMODE_READ); nfs_put_lock_context(l_ctx); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; + } status = nfs4_call_sync(src_server->client, src_server, &msg, &args->cna_seq_args, &res->cnr_seq_res, 0); @@ -618,8 +630,11 @@ static loff_t _nfs42_proc_llseek(struct file *filep, status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, lock, FMODE_READ); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; + } status = nfs_filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); @@ -994,13 +1009,18 @@ static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, src_lock, FMODE_READ); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; - + } status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, dst_lock, FMODE_WRITE); - if (status) + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; return status; + } res.dst_fattr = nfs_alloc_fattr(); if (!res.dst_fattr) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 22175b85b586..e178e2e7ad80 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3251,6 +3251,8 @@ static int _nfs4_do_setattr(struct inode *inode, nfs_put_lock_context(l_ctx); if (status == -EIO) return -EBADF; + else if (status == -EAGAIN) + goto zero_stateid; } else { zero_stateid: nfs4_stateid_copy(&arg->stateid, &zero_stateid); diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index cec3070ab577..3ac6b4dea72d 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1998,8 +1998,6 @@ lookup_again: trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, PNFS_UPDATE_LAYOUT_INVALID_OPEN); - if (status != -EAGAIN) - goto out_unlock; spin_unlock(&ino->i_lock); nfs4_schedule_stateid_recovery(server, ctx->state); pnfs_clear_first_layoutget(lo); -- cgit v1.2.3-59-g8ed1b From fe1e8dbec11fcad3ae7a34e95fe483d4a2b018fc Mon Sep 17 00:00:00 2001 From: Su Yanjun Date: Wed, 25 Dec 2019 11:37:57 +0800 Subject: NFSv3: FIx bug when using chacl and chmod to change acl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We find a bug when running test under nfsv3  as below. 1) chacl u::r--,g::rwx,o:rw- file1 2) chmod u+w file1 3) chacl -l file1 We expect u::rw-, but it shows u::r--, more likely it returns the cached acl in inode. We dig the code find that the code path is different. chacl->..->__nfs3_proc_setacls->nfs_zap_acl_cache Then nfs_zap_acl_cache clears the NFS_INO_INVALID_ACL in NFS_I(inode)->cache_validity. chmod->..->nfs3_proc_setattr Because NFS_INO_INVALID_ACL has been cleared by chacl path, nfs_zap_acl_cache wont be called. nfs_setattr_update_inode will set NFS_INO_INVALID_ACL so let it before nfs_zap_acl_cache call. Signed-off-by: Su Yanjun Signed-off-by: Anna Schumaker --- fs/nfs/nfs3proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 19f3d1b2807e..4c93a8bca7dc 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -145,9 +145,9 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); if (status == 0) { + nfs_setattr_update_inode(inode, sattr, fattr); if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) nfs_zap_acl_cache(inode); - nfs_setattr_update_inode(inode, sattr, fattr); } dprintk("NFS reply setattr: %d\n", status); return status; -- cgit v1.2.3-59-g8ed1b From f7b37b8b139860ed786bf8ce4358290c6053d94d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 14 Jan 2020 12:06:34 -0500 Subject: NFS: Add softreval behaviour to nfs_lookup_revalidate() If the server is unavaliable, we want to allow the revalidating lookup to time out, and to default to validating the cached dentry if the 'softreval' mount option is set. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 15 +++++++++++---- fs/nfs/internal.h | 9 +++++++++ fs/nfs/namespace.c | 2 +- fs/nfs/nfs3proc.c | 17 +++++++++++------ fs/nfs/nfs4_fs.h | 6 ++++-- fs/nfs/nfs4namespace.c | 3 +-- fs/nfs/nfs4proc.c | 28 ++++++++++++++++++---------- fs/nfs/proc.c | 15 ++++++++++----- include/linux/nfs_xdr.h | 2 +- 9 files changed, 66 insertions(+), 31 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 9405eeadc3f3..bfc66f3f00e1 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1142,10 +1142,17 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry, if (fhandle == NULL || fattr == NULL || IS_ERR(label)) goto out; - ret = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label); + ret = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, label); if (ret < 0) { - if (ret == -ESTALE || ret == -ENOENT) + switch (ret) { + case -ESTALE: + case -ENOENT: ret = 0; + break; + case -ETIMEDOUT: + if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) + ret = 1; + } goto out; } ret = 0; @@ -1408,7 +1415,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in goto out; trace_nfs_lookup_enter(dir, dentry, flags); - error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label); + error = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, label); if (error == -ENOENT) goto no_entry; if (error < 0) { @@ -1683,7 +1690,7 @@ nfs_add_or_obtain(struct dentry *dentry, struct nfs_fh *fhandle, d_drop(dentry); if (fhandle->size == 0) { - error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, NULL); + error = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, NULL); if (error) goto out_error; } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 17f082442804..f80c47d5ff27 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -33,6 +33,15 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) return 1; } +static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry) +{ + if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL)) + return false; + if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size) + return false; + return true; +} + /* * Note: RFC 1813 doesn't limit the number of auth flavors that * a server can return, so make something up. diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 4fd22c0d730c..ad6077404947 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -301,7 +301,7 @@ int nfs_submount(struct fs_context *fc, struct nfs_server *server) int err; /* Look it up again to get its attributes */ - err = server->nfs_client->rpc_ops->lookup(d_inode(parent), &dentry->d_name, + err = server->nfs_client->rpc_ops->lookup(d_inode(parent), dentry, ctx->mntfh, ctx->clone_data.fattr, NULL); dput(parent); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 4c93a8bca7dc..a46d1d5d16d8 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -154,14 +154,14 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, } static int -nfs3_proc_lookup(struct inode *dir, const struct qstr *name, +nfs3_proc_lookup(struct inode *dir, struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs3_diropargs arg = { .fh = NFS_FH(dir), - .name = name->name, - .len = name->len + .name = dentry->d_name.name, + .len = dentry->d_name.len }; struct nfs3_diropres res = { .fh = fhandle, @@ -173,20 +173,25 @@ nfs3_proc_lookup(struct inode *dir, const struct qstr *name, .rpc_resp = &res, }; int status; + unsigned short task_flags = 0; + /* Is this is an attribute revalidation, subject to softreval? */ + if (nfs_lookup_is_soft_revalidate(dentry)) + task_flags |= RPC_TASK_TIMEOUT; + + dprintk("NFS call lookup %pd2\n", dentry); res.dir_attr = nfs_alloc_fattr(); if (res.dir_attr == NULL) return -ENOMEM; - dprintk("NFS call lookup %s\n", name->name); nfs_fattr_init(fattr); - status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); nfs_refresh_inode(dir, res.dir_attr); if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; msg.rpc_argp = fhandle; msg.rpc_resp = fattr; - status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); } nfs_free_fattr(res.dir_attr); dprintk("NFS reply lookup: %d\n", status); diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 9c136d53987d..c3e669dcee0e 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -302,8 +302,10 @@ extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struc extern int nfs4_proc_get_locations(struct inode *, struct nfs4_fs_locations *, struct page *page, const struct cred *); extern int nfs4_proc_fsid_present(struct inode *, const struct cred *); -extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, const struct qstr *, - struct nfs_fh *, struct nfs_fattr *); +extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, + struct dentry *, + struct nfs_fh *, + struct nfs_fattr *); extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *); extern const struct xattr_handler *nfs4_xattr_handlers[]; extern int nfs4_set_rw_stateid(nfs4_stateid *stateid, diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index de6875a9b391..3ea1c1008b5b 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -442,12 +442,11 @@ int nfs4_submount(struct fs_context *fc, struct nfs_server *server) struct dentry *dentry = ctx->clone_data.dentry; struct dentry *parent = dget_parent(dentry); struct inode *dir = d_inode(parent); - const struct qstr *name = &dentry->d_name; struct rpc_clnt *client; int ret; /* Look it up again to get its attributes and sec flavor */ - client = nfs4_proc_lookup_mountpoint(dir, name, ctx->mntfh, + client = nfs4_proc_lookup_mountpoint(dir, dentry, ctx->mntfh, ctx->clone_data.fattr); dput(parent); if (IS_ERR(client)) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index e178e2e7ad80..df38db2eee3b 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4177,7 +4177,7 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, } static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, - const struct qstr *name, struct nfs_fh *fhandle, + struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs_server *server = NFS_SERVER(dir); @@ -4185,7 +4185,7 @@ static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct nfs4_lookup_arg args = { .bitmask = server->attr_bitmask, .dir_fh = NFS_FH(dir), - .name = name, + .name = &dentry->d_name, }; struct nfs4_lookup_res res = { .server = server, @@ -4198,13 +4198,20 @@ static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, .rpc_argp = &args, .rpc_resp = &res, }; + unsigned short task_flags = 0; + + /* Is this is an attribute revalidation, subject to softreval? */ + if (nfs_lookup_is_soft_revalidate(dentry)) + task_flags |= RPC_TASK_TIMEOUT; args.bitmask = nfs4_bitmask(server, label); nfs_fattr_init(fattr); - dprintk("NFS call lookup %s\n", name->name); - status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); + dprintk("NFS call lookup %pd2\n", dentry); + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); + status = nfs4_do_call_sync(clnt, server, &msg, + &args.seq_args, &res.seq_res, task_flags); dprintk("NFS reply lookup: %d\n", status); return status; } @@ -4218,16 +4225,17 @@ static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) } static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, - const struct qstr *name, struct nfs_fh *fhandle, + struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs4_exception exception = { .interruptible = true, }; struct rpc_clnt *client = *clnt; + const struct qstr *name = &dentry->d_name; int err; do { - err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); + err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label); trace_nfs4_lookup(dir, name, err); switch (err) { case -NFS4ERR_BADNAME: @@ -4262,14 +4270,14 @@ out: return err; } -static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, +static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label) { int status; struct rpc_clnt *client = NFS_CLIENT(dir); - status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); + status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label); if (client != NFS_CLIENT(dir)) { rpc_shutdown_client(client); nfs_fixup_secinfo_attributes(fattr); @@ -4278,13 +4286,13 @@ static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, } struct rpc_clnt * -nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, +nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct rpc_clnt *client = NFS_CLIENT(dir); int status; - status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); + status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL); if (status < 0) return ERR_PTR(status); return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 0451a094e89e..15c865cc837f 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -152,14 +152,14 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, } static int -nfs_proc_lookup(struct inode *dir, const struct qstr *name, +nfs_proc_lookup(struct inode *dir, struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), - .name = name->name, - .len = name->len + .name = dentry->d_name.name, + .len = dentry->d_name.len }; struct nfs_diropok res = { .fh = fhandle, @@ -171,10 +171,15 @@ nfs_proc_lookup(struct inode *dir, const struct qstr *name, .rpc_resp = &res, }; int status; + unsigned short task_flags = 0; - dprintk("NFS call lookup %s\n", name->name); + /* Is this is an attribute revalidation, subject to softreval? */ + if (nfs_lookup_is_soft_revalidate(dentry)) + task_flags |= RPC_TASK_TIMEOUT; + + dprintk("NFS call lookup %pd2\n", dentry); nfs_fattr_init(fattr); - status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); dprintk("NFS reply lookup: %d\n", status); return status; } diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 0a36c6f62b58..94c77ed55ce1 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1661,7 +1661,7 @@ struct nfs_rpc_ops { struct inode *); int (*setattr) (struct dentry *, struct nfs_fattr *, struct iattr *); - int (*lookup) (struct inode *, const struct qstr *, + int (*lookup) (struct inode *, struct dentry *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *); int (*lookupp) (struct inode *, struct nfs_fh *, -- cgit v1.2.3-59-g8ed1b From b24ee6c64ca785739b3ef8d95fd6becaad1bde39 Mon Sep 17 00:00:00 2001 From: Olga Kornievskaia Date: Mon, 16 Dec 2019 16:34:02 -0500 Subject: NFS: allow deprecation of NFS UDP protocol Add a kernel config CONFIG_NFS_DISABLE_UDP_SUPPORT to disallow NFS UDP mounts and enable it by default. Signed-off-by: Olga Kornievskaia Signed-off-by: Anna Schumaker --- fs/nfs/Kconfig | 9 +++++++++ fs/nfs/client.c | 4 ++++ fs/nfs/fs_context.c | 4 ++++ 3 files changed, 17 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig index e7dd07f47825..40b6c5ac46c0 100644 --- a/fs/nfs/Kconfig +++ b/fs/nfs/Kconfig @@ -196,3 +196,12 @@ config NFS_DEBUG depends on NFS_FS && SUNRPC_DEBUG select CRC32 default y + +config NFS_DISABLE_UDP_SUPPORT + bool "NFS: Disable NFS UDP protocol support" + depends on NFS_FS + default y + help + Choose Y here to disable the use of NFS over UDP. NFS over UDP + on modern networks (1Gb+) can lead to data corruption caused by + fragmentation during high loads. diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 8f760f23748c..989c30c98511 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -474,6 +474,7 @@ void nfs_init_timeout_values(struct rpc_timeout *to, int proto, to->to_maxval = to->to_initval; to->to_exponential = 0; break; +#ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT case XPRT_TRANSPORT_UDP: if (retrans == NFS_UNSPEC_RETRANS) to->to_retries = NFS_DEF_UDP_RETRANS; @@ -484,6 +485,7 @@ void nfs_init_timeout_values(struct rpc_timeout *to, int proto, to->to_maxval = NFS_MAX_UDP_TIMEOUT; to->to_exponential = 1; break; +#endif default: BUG(); } @@ -580,8 +582,10 @@ static int nfs_start_lockd(struct nfs_server *server) default: nlm_init.protocol = IPPROTO_TCP; break; +#ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT case XPRT_TRANSPORT_UDP: nlm_init.protocol = IPPROTO_UDP; +#endif } host = nlmclnt_init(&nlm_init); diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 0247dcb7b316..dfd95847f005 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -1215,6 +1215,10 @@ static int nfs_fs_context_validate(struct fs_context *fc) } } else { nfs_set_mount_transport_protocol(ctx); +#ifdef CONFIG_NFS_DISABLE_UDP_SUPPORT + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; +#endif if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) port = NFS_RDMA_PORT; } -- cgit v1.2.3-59-g8ed1b From 3a21409a0b4bce3171001b168ca42285004c873c Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 17 Jan 2020 15:55:09 +0000 Subject: nfs: Return EINVAL rather than ERANGE for mount parse errors Return EINVAL rather than ERANGE for mount parse errors as the userspace mount command doesn't necessarily understand what to do with anything other than EINVAL. The old code returned -ERANGE as an intermediate error that then get converted to -EINVAL, whereas the new code returns -ERANGE. This was induced by passing minorversion=1 to a v4 mount where CONFIG_NFS_V4_1 was disabled in the kernel build. Fixes: 68f65ef40e1e ("NFS: Convert mount option parsing to use functionality from fs_parser.h") Reported-by: Krzysztof Kozlowski Signed-off-by: David Howells Signed-off-by: Anna Schumaker --- fs/nfs/fs_context.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index dfd95847f005..2c6dc1b6cc92 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -779,8 +779,7 @@ out_invalid_value: out_invalid_address: return nfs_invalf(fc, "NFS: Bad IP address specified"); out_of_bounds: - nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key); - return -ERANGE; + return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key); } /* -- cgit v1.2.3-59-g8ed1b From c0399cf668a2a1b7310dbedd424f6a4b60aabffc Mon Sep 17 00:00:00 2001 From: Alex Shi Date: Tue, 21 Jan 2020 16:49:56 +0800 Subject: NFS: remove unused macros MNT_fhs_status_sz/MNT_fhandle3_sz are never used after they were introduced. So better to remove them. Signed-off-by: Alex Shi Cc: Trond Myklebust Cc: Anna Schumaker Cc: linux-nfs@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anna Schumaker --- fs/nfs/mount_clnt.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index cb7c10e9721e..35c8cb2d7637 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -29,9 +29,7 @@ */ #define encode_dirpath_sz (1 + XDR_QUADLEN(MNTPATHLEN)) #define MNT_status_sz (1) -#define MNT_fhs_status_sz (1) #define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE) -#define MNT_fhandle3_sz (1 + XDR_QUADLEN(NFS3_FHSIZE)) #define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS) /* -- cgit v1.2.3-59-g8ed1b From 387122478775be5d9816c34aa29de53d0b926835 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 26 Jan 2020 17:31:13 -0500 Subject: NFSv4: pnfs_roc() must use cred_fscmp() to compare creds When comparing two 'struct cred' for equality w.r.t. behaviour under filesystem access, we need to use cred_fscmp(). Fixes: a52458b48af1 ("NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.") Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/pnfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 3ac6b4dea72d..542ea8dfd1bc 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1425,7 +1425,7 @@ retry: /* lo ref dropped in pnfs_roc_release() */ layoutreturn = pnfs_prepare_layoutreturn(lo, &stateid, &iomode); /* If the creds don't match, we can't compound the layoutreturn */ - if (!layoutreturn || cred != lo->plh_lc_cred) + if (!layoutreturn || cred_fscmp(cred, lo->plh_lc_cred) != 0) goto out_noroc; roc = layoutreturn; -- cgit v1.2.3-59-g8ed1b From 9a206de2ea878f4502e86b81c0d7eb9b651bde82 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 26 Jan 2020 17:31:14 -0500 Subject: NFS: nfs_access_get_cached_rcu() should use cred_fscmp() We do not need to have the rcu lookup method fail in the case where the fsuid/fsgid and supplemental groups match. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index bfc66f3f00e1..6427a8a8d61a 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -2360,7 +2360,7 @@ static int nfs_access_get_cached_rcu(struct inode *inode, const struct cred *cre lh = rcu_dereference(nfsi->access_cache_entry_lru.prev); cache = list_entry(lh, struct nfs_access_entry, lru); if (lh == &nfsi->access_cache_entry_lru || - cred != cache->cred) + cred_fscmp(cred, cache->cred) != 0) cache = NULL; if (cache == NULL) goto out; -- cgit v1.2.3-59-g8ed1b From 65f5160376212094b477c7309ba9867e69ec69d5 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 26 Jan 2020 17:31:15 -0500 Subject: NFS: nfs_find_open_context() should use cred_fscmp() We want to find open contexts that match our filesystem access properties. They don't have to exactly match the cred. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 71dfc9d2fc3d..1309e6f47f3d 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1061,7 +1061,7 @@ struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct rcu_read_lock(); list_for_each_entry_rcu(pos, &nfsi->open_files, list) { - if (cred != NULL && pos->cred != cred) + if (cred != NULL && cred_fscmp(pos->cred, cred) != 0) continue; if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) continue; -- cgit v1.2.3-59-g8ed1b From f885ea640d65d98c8f1a326efb3abe13f1865c89 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 27 Jan 2020 09:58:15 -0500 Subject: NFSv4: nfs_inode_evict_delegation() should set NFS_DELEGATION_RETURNING In particular, the pnfs return-on-close code will check for that flag, so ensure we set it appropriately. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/delegation.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/nfs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index fe57b2b5314a..a7e42725c3b1 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -607,6 +607,7 @@ void nfs_inode_evict_delegation(struct inode *inode) delegation = nfs_inode_detach_delegation(inode); if (delegation != NULL) { + set_bit(NFS_DELEGATION_RETURNING, &delegation->flags); set_bit(NFS_DELEGATION_INODE_FREEING, &delegation->flags); nfs_do_return_delegation(inode, delegation, 1); nfs_free_delegation(delegation); -- cgit v1.2.3-59-g8ed1b From 0d10416797c27b9e359d4bd94fb9db6f34f25d83 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 27 Jan 2020 09:58:16 -0500 Subject: NFS: Clear NFS_DELEGATION_RETURN_IF_CLOSED when the delegation is returned If a delegation is marked as needing to be returned when the file is closed, then don't clear that marking until we're ready to return it. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/delegation.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index a7e42725c3b1..b5b14618b73e 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -479,7 +479,7 @@ static bool nfs_delegation_need_return(struct nfs_delegation *delegation) if (test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags)) ret = true; - if (test_and_clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags) && !ret) { + else if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) { struct inode *inode; spin_lock(&delegation->lock); @@ -488,6 +488,8 @@ static bool nfs_delegation_need_return(struct nfs_delegation *delegation) ret = true; spin_unlock(&delegation->lock); } + if (ret) + clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags) || test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) ret = false; -- cgit v1.2.3-59-g8ed1b From b7b7dac6843e483b6fe8e29cef99e3dbb7594a53 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 27 Jan 2020 09:58:17 -0500 Subject: NFSv4: Try to return the delegation immediately when marked for return on close Add a routine to return the delegation immediately upon close of the file if it was marked for return-on-close. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/delegation.c | 33 +++++++++++++++++++++++++++++++++ fs/nfs/delegation.h | 1 + fs/nfs/nfs4state.c | 1 + 3 files changed, 35 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index b5b14618b73e..90e50f32f3e0 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -639,6 +639,39 @@ int nfs4_inode_return_delegation(struct inode *inode) return err; } +/** + * nfs_inode_return_delegation_on_close - asynchronously return a delegation + * @inode: inode to process + * + * This routine is called on file close in order to determine if the + * inode delegation needs to be returned immediately. + */ +void nfs4_inode_return_delegation_on_close(struct inode *inode) +{ + struct nfs_delegation *delegation; + struct nfs_delegation *ret = NULL; + + if (!inode) + return; + rcu_read_lock(); + delegation = nfs4_get_valid_delegation(inode); + if (!delegation) + goto out; + if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) { + spin_lock(&delegation->lock); + if (delegation->inode && + list_empty(&NFS_I(inode)->open_files) && + !test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { + clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); + ret = delegation; + } + spin_unlock(&delegation->lock); + } +out: + rcu_read_unlock(); + nfs_end_delegation_return(inode, ret, 0); +} + /** * nfs4_inode_make_writeable * @inode: pointer to inode diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 15d3484be028..31b84604d383 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -42,6 +42,7 @@ int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred, void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred, fmode_t type, const nfs4_stateid *stateid, unsigned long pagemod_limit); int nfs4_inode_return_delegation(struct inode *inode); +void nfs4_inode_return_delegation_on_close(struct inode *inode); int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); void nfs_inode_evict_delegation(struct inode *inode); diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index fe1b908eecc8..19b473bc560e 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -766,6 +766,7 @@ void nfs4_put_open_state(struct nfs4_state *state) list_del(&state->open_states); spin_unlock(&inode->i_lock); spin_unlock(&owner->so_lock); + nfs4_inode_return_delegation_on_close(inode); iput(inode); nfs4_free_open_state(state); nfs4_put_state_owner(owner); -- cgit v1.2.3-59-g8ed1b From d2269ea14ebd2a73f291d6b3a7a7d320ec00270c Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 27 Jan 2020 09:58:18 -0500 Subject: NFSv4: Add accounting for the number of active delegations held In order to better manage our delegation caching, add a counter to track the number of active delegations. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/delegation.c | 36 ++++++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 12 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 90e50f32f3e0..a777b3d0e720 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -25,13 +25,29 @@ #include "internal.h" #include "nfs4trace.h" -static void nfs_free_delegation(struct nfs_delegation *delegation) +static atomic_long_t nfs_active_delegations; + +static void __nfs_free_delegation(struct nfs_delegation *delegation) { put_cred(delegation->cred); delegation->cred = NULL; kfree_rcu(delegation, rcu); } +static void nfs_mark_delegation_revoked(struct nfs_delegation *delegation) +{ + if (!test_and_set_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { + delegation->stateid.type = NFS4_INVALID_STATEID_TYPE; + atomic_long_dec(&nfs_active_delegations); + } +} + +static void nfs_free_delegation(struct nfs_delegation *delegation) +{ + nfs_mark_delegation_revoked(delegation); + __nfs_free_delegation(delegation); +} + /** * nfs_mark_delegation_referenced - set delegation's REFERENCED flag * @delegation: delegation to process @@ -343,7 +359,8 @@ nfs_update_inplace_delegation(struct nfs_delegation *delegation, delegation->stateid.seqid = update->stateid.seqid; smp_wmb(); delegation->type = update->type; - clear_bit(NFS_DELEGATION_REVOKED, &delegation->flags); + if (test_and_clear_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) + atomic_long_inc(&nfs_active_delegations); } } @@ -423,6 +440,8 @@ add_new: rcu_assign_pointer(nfsi->delegation, delegation); delegation = NULL; + atomic_long_inc(&nfs_active_delegations); + trace_nfs4_set_delegation(inode, type); spin_lock(&inode->i_lock); @@ -432,7 +451,7 @@ add_new: out: spin_unlock(&clp->cl_lock); if (delegation != NULL) - nfs_free_delegation(delegation); + __nfs_free_delegation(delegation); if (freeme != NULL) { nfs_do_return_delegation(inode, freeme, 0); nfs_free_delegation(freeme); @@ -796,13 +815,6 @@ static void nfs_client_mark_return_unused_delegation_types(struct nfs_client *cl rcu_read_unlock(); } -static void nfs_mark_delegation_revoked(struct nfs_server *server, - struct nfs_delegation *delegation) -{ - set_bit(NFS_DELEGATION_REVOKED, &delegation->flags); - delegation->stateid.type = NFS4_INVALID_STATEID_TYPE; -} - static void nfs_revoke_delegation(struct inode *inode, const nfs4_stateid *stateid) { @@ -830,7 +842,7 @@ static void nfs_revoke_delegation(struct inode *inode, } spin_unlock(&delegation->lock); } - nfs_mark_delegation_revoked(NFS_SERVER(inode), delegation); + nfs_mark_delegation_revoked(delegation); ret = true; out: rcu_read_unlock(); @@ -869,7 +881,7 @@ void nfs_delegation_mark_returned(struct inode *inode, delegation->stateid.seqid = stateid->seqid; } - nfs_mark_delegation_revoked(NFS_SERVER(inode), delegation); + nfs_mark_delegation_revoked(delegation); out_clear_returning: clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags); -- cgit v1.2.3-59-g8ed1b From 10717f45639f6c1bc27b56405252c3a027406d92 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 27 Jan 2020 09:58:19 -0500 Subject: NFSv4: Limit the total number of cached delegations Delegations can be expensive to return, and can cause scalability issues for the server. Let's therefore try to limit the number of inactive delegations we hold. Once the number of delegations is above a certain threshold, start to return them on close. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/delegation.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index a777b3d0e720..4a841071d8a7 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -25,7 +25,10 @@ #include "internal.h" #include "nfs4trace.h" +#define NFS_DEFAULT_DELEGATION_WATERMARK (5000U) + static atomic_long_t nfs_active_delegations; +static unsigned nfs_delegation_watermark = NFS_DEFAULT_DELEGATION_WATERMARK; static void __nfs_free_delegation(struct nfs_delegation *delegation) { @@ -676,7 +679,8 @@ void nfs4_inode_return_delegation_on_close(struct inode *inode) delegation = nfs4_get_valid_delegation(inode); if (!delegation) goto out; - if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) { + if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags) || + atomic_long_read(&nfs_active_delegations) >= nfs_delegation_watermark) { spin_lock(&delegation->lock); if (delegation->inode && list_empty(&NFS_I(inode)->open_files) && @@ -1365,3 +1369,5 @@ out: rcu_read_unlock(); return ret; } + +module_param_named(delegation_watermark, nfs_delegation_watermark, uint, 0644); -- cgit v1.2.3-59-g8ed1b From a8bd9ddf397be8e0d812ce3da4e40440ac25f6d0 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2020 17:57:07 -0500 Subject: NFS: Replace various occurrences of kstrndup() with kmemdup_nul() When we already know the string length, it is more efficient to use kmemdup_nul(). Signed-off-by: Trond Myklebust [Anna - Changes to super.c were already made during fscontext conversion] Signed-off-by: Anna Schumaker --- fs/nfs/dns_resolve.c | 2 +- fs/nfs/nfs4namespace.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c index aec769a500a1..89bd5581f317 100644 --- a/fs/nfs/dns_resolve.c +++ b/fs/nfs/dns_resolve.c @@ -93,7 +93,7 @@ static void nfs_dns_ent_init(struct cache_head *cnew, key = container_of(ckey, struct nfs_dns_ent, h); kfree(new->hostname); - new->hostname = kstrndup(key->hostname, key->namelen, GFP_KERNEL); + new->hostname = kmemdup_nul(key->hostname, key->namelen, GFP_KERNEL); if (new->hostname) { new->namelen = key->namelen; nfs_dns_ent_update(cnew, ckey); diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 3ea1c1008b5b..84026e7b8a5f 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -501,7 +501,7 @@ static int nfs4_try_replacing_one_location(struct nfs_server *server, rpc_set_port(sap, NFS_PORT); error = -ENOMEM; - hostname = kstrndup(buf->data, buf->len, GFP_KERNEL); + hostname = kmemdup_nul(buf->data, buf->len, GFP_KERNEL); if (hostname == NULL) break; -- cgit v1.2.3-59-g8ed1b From 4b310319c6a8ce708f1033d57145e2aa027a883c Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2020 17:53:53 -0500 Subject: NFS: Fix memory leaks and corruption in readdir nfs_readdir_xdr_to_array() must not exit without having initialised the array, so that the page cache deletion routines can safely call nfs_readdir_clear_array(). Furthermore, we should ensure that if we exit nfs_readdir_filler() with an error, we free up any page contents to prevent a leak if we try to fill the page again. Fixes: 11de3b11e08c ("NFS: Fix a memory leak in nfs_readdir") Cc: stable@vger.kernel.org # v2.6.37+ Signed-off-by: Trond Myklebust Reviewed-by: Benjamin Coddington Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 6427a8a8d61a..451c48cdb1c2 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -162,6 +162,17 @@ typedef struct { bool eof; } nfs_readdir_descriptor_t; +static +void nfs_readdir_init_array(struct page *page) +{ + struct nfs_cache_array *array; + + array = kmap_atomic(page); + memset(array, 0, sizeof(struct nfs_cache_array)); + array->eof_index = -1; + kunmap_atomic(array); +} + /* * we are freeing strings created by nfs_add_to_readdir_array() */ @@ -174,6 +185,7 @@ void nfs_readdir_clear_array(struct page *page) array = kmap_atomic(page); for (i = 0; i < array->size; i++) kfree(array->array[i].string.name); + array->size = 0; kunmap_atomic(array); } @@ -610,6 +622,8 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, int status = -ENOMEM; unsigned int array_size = ARRAY_SIZE(pages); + nfs_readdir_init_array(page); + entry.prev_cookie = 0; entry.cookie = desc->last_cookie; entry.eof = 0; @@ -626,8 +640,6 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, } array = kmap(page); - memset(array, 0, sizeof(struct nfs_cache_array)); - array->eof_index = -1; status = nfs_readdir_alloc_pages(pages, array_size); if (status < 0) @@ -682,6 +694,7 @@ int nfs_readdir_filler(void *data, struct page* page) unlock_page(page); return 0; error: + nfs_readdir_clear_array(page); unlock_page(page); return ret; } -- cgit v1.2.3-59-g8ed1b From 114de38225d9b300f027e2aec9afbb6e0def154b Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2020 17:53:54 -0500 Subject: NFS: Directory page cache pages need to be locked when read When a NFS directory page cache page is removed from the page cache, its contents are freed through a call to nfs_readdir_clear_array(). To prevent the removal of the page cache entry until after we've finished reading it, we must take the page lock. Fixes: 11de3b11e08c ("NFS: Fix a memory leak in nfs_readdir") Cc: stable@vger.kernel.org # v2.6.37+ Signed-off-by: Trond Myklebust Reviewed-by: Benjamin Coddington Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 451c48cdb1c2..d95c2c94bd87 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -702,8 +702,6 @@ int nfs_readdir_filler(void *data, struct page* page) static void cache_page_release(nfs_readdir_descriptor_t *desc) { - if (!desc->page->mapping) - nfs_readdir_clear_array(desc->page); put_page(desc->page); desc->page = NULL; } @@ -717,19 +715,28 @@ struct page *get_cache_page(nfs_readdir_descriptor_t *desc) /* * Returns 0 if desc->dir_cookie was found on page desc->page_index + * and locks the page to prevent removal from the page cache. */ static -int find_cache_page(nfs_readdir_descriptor_t *desc) +int find_and_lock_cache_page(nfs_readdir_descriptor_t *desc) { int res; desc->page = get_cache_page(desc); if (IS_ERR(desc->page)) return PTR_ERR(desc->page); - - res = nfs_readdir_search_array(desc); + res = lock_page_killable(desc->page); if (res != 0) - cache_page_release(desc); + goto error; + res = -EAGAIN; + if (desc->page->mapping != NULL) { + res = nfs_readdir_search_array(desc); + if (res == 0) + return 0; + } + unlock_page(desc->page); +error: + cache_page_release(desc); return res; } @@ -744,7 +751,7 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) desc->last_cookie = 0; } do { - res = find_cache_page(desc); + res = find_and_lock_cache_page(desc); } while (res == -EAGAIN); return res; } @@ -783,7 +790,6 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc) desc->eof = true; kunmap(desc->page); - cache_page_release(desc); dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); return res; @@ -829,13 +835,13 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc) status = nfs_do_filldir(desc); + out_release: + nfs_readdir_clear_array(desc->page); + cache_page_release(desc); out: dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __func__, status); return status; - out_release: - cache_page_release(desc); - goto out; } /* The file offset position represents the dirent entry number. A @@ -900,6 +906,8 @@ static int nfs_readdir(struct file *file, struct dir_context *ctx) break; res = nfs_do_filldir(desc); + unlock_page(desc->page); + cache_page_release(desc); if (res < 0) break; } while (!desc->eof); -- cgit v1.2.3-59-g8ed1b From 3803d6721baff3d5dd6cd6b8c7294e54d124bc41 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2020 17:53:55 -0500 Subject: NFS: Use kmemdup_nul() in nfs_readdir_make_qstr() The directory strings stored in the readdir cache may be used with printk(), so it is better to ensure they are nul-terminated. Signed-off-by: Trond Myklebust Reviewed-by: Benjamin Coddington Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index d95c2c94bd87..5a8ff7e97ce3 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -198,7 +198,7 @@ static int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int len) { string->len = len; - string->name = kmemdup(name, len, GFP_KERNEL); + string->name = kmemdup_nul(name, len, GFP_KERNEL); if (string->name == NULL) return -ENOMEM; /* -- cgit v1.2.3-59-g8ed1b From 93a6ab7b691fe33d5a30e7fc8e85276de2815108 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2020 17:53:56 -0500 Subject: NFS: Switch readdir to using iterate_shared() Now that the page cache locking is repaired, we should be able to switch to using iterate_shared() for improved concurrency when doing readdir(). Signed-off-by: Trond Myklebust Reviewed-by: Benjamin Coddington Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 5a8ff7e97ce3..88f6cf1ccf8c 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -58,7 +58,7 @@ static void nfs_readdir_clear_array(struct page*); const struct file_operations nfs_dir_operations = { .llseek = nfs_llseek_dir, .read = generic_read_dir, - .iterate = nfs_readdir, + .iterate_shared = nfs_readdir, .open = nfs_opendir, .release = nfs_closedir, .fsync = nfs_fsync_dir, -- cgit v1.2.3-59-g8ed1b From 227823d2074da0c138d2abc0074b2dd281bbf923 Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Wed, 22 Jan 2020 20:45:39 -0500 Subject: nfs: optimise readdir cache page invalidation When the directory is large and it's being modified by one client while another client is doing the 'ls -l' on the same directory then the cache page invalidation from nfs_force_use_readdirplus causes the reading client to keep restarting READDIRPLUS from cookie 0 which causes the 'ls -l' to take a very long time to complete, possibly never completing. Currently when nfs_force_use_readdirplus is called to switch from READDIR to READDIRPLUS, it invalidates all the cached pages of the directory. This cache page invalidation causes the next nfs_readdir to re-read the directory content from cookie 0. This patch is to optimise the cache invalidation in nfs_force_use_readdirplus by only truncating the cached pages from last page index accessed to the end the file. It also marks the inode to delay invalidating all the cached page of the directory until the next initial nfs_readdir of the next 'ls' instance. Signed-off-by: Dai Ngo Reviewed-by: Trond Myklebust [Anna - Fix conflicts with Trond's readdir patches] [Anna - Remove redundant call to nfs_zap_mapping()] [Anna - Replace d_inode(file_dentry(desc->file)) with file_inode(desc->file)] Signed-off-by: Anna Schumaker --- fs/nfs/dir.c | 9 +++++++-- include/linux/nfs_fs.h | 3 +++ 2 files changed, 10 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 88f6cf1ccf8c..1320288ff9ec 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -449,7 +449,8 @@ void nfs_force_use_readdirplus(struct inode *dir) if (nfs_server_capable(dir, NFS_CAP_READDIRPLUS) && !list_empty(&nfsi->open_files)) { set_bit(NFS_INO_ADVISE_RDPLUS, &nfsi->flags); - invalidate_mapping_pages(dir->i_mapping, 0, -1); + invalidate_mapping_pages(dir->i_mapping, + nfsi->page_index + 1, -1); } } @@ -720,6 +721,8 @@ struct page *get_cache_page(nfs_readdir_descriptor_t *desc) static int find_and_lock_cache_page(nfs_readdir_descriptor_t *desc) { + struct inode *inode = file_inode(desc->file); + struct nfs_inode *nfsi = NFS_I(inode); int res; desc->page = get_cache_page(desc); @@ -731,8 +734,10 @@ int find_and_lock_cache_page(nfs_readdir_descriptor_t *desc) res = -EAGAIN; if (desc->page->mapping != NULL) { res = nfs_readdir_search_array(desc); - if (res == 0) + if (res == 0) { + nfsi->page_index = desc->page_index; return 0; + } } unlock_page(desc->page); error: diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index c06b1fd130f3..a5f8f03ecd59 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -168,6 +168,9 @@ struct nfs_inode { struct rw_semaphore rmdir_sem; struct mutex commit_mutex; + /* track last access to cached pages */ + unsigned long page_index; + #if IS_ENABLED(CONFIG_NFS_V4) struct nfs4_cached_acl *nfs4_acl; /* NFSv4 state */ -- cgit v1.2.3-59-g8ed1b From 123c23c6a7b7ecd2a3d6060bea1d94019f71fd66 Mon Sep 17 00:00:00 2001 From: Wenwen Wang Date: Mon, 3 Feb 2020 03:47:53 +0000 Subject: NFS: Fix memory leaks In _nfs42_proc_copy(), 'res->commit_res.verf' is allocated through kzalloc() if 'args->sync' is true. In the following code, if 'res->synchronous' is false, handle_async_copy() will be invoked. If an error occurs during the invocation, the following code will not be executed and the error will be returned . However, the allocated 'res->commit_res.verf' is not deallocated, leading to a memory leak. This is also true if the invocation of process_copy_commit() returns an error. To fix the above leaks, redirect the execution to the 'out' label if an error is encountered. Signed-off-by: Wenwen Wang Signed-off-by: Anna Schumaker --- fs/nfs/nfs42proc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 9637aad36bdc..e2ae54b35dfe 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -343,14 +343,14 @@ static ssize_t _nfs42_proc_copy(struct file *src, status = handle_async_copy(res, dst_server, src_server, src, dst, &args->src_stateid, restart); if (status) - return status; + goto out; } if ((!res->synchronous || !args->sync) && res->write_res.verifier.committed != NFS_FILE_SYNC) { status = process_copy_commit(dst, pos_dst, res); if (status) - return status; + goto out; } truncate_pagecache_range(dst_inode, pos_dst, -- cgit v1.2.3-59-g8ed1b From 924491f2e476f7234d722b24171a4daff61bbe13 Mon Sep 17 00:00:00 2001 From: Robert Milkowski Date: Tue, 28 Jan 2020 08:37:47 +0000 Subject: NFSv4: try lease recovery on NFS4ERR_EXPIRED Currently, if an nfs server returns NFS4ERR_EXPIRED to open(), we return EIO to applications without even trying to recover. Fixes: 272289a3df72 ("NFSv4: nfs4_do_handle_exception() handle revoke/expiry of a single stateid") Signed-off-by: Robert Milkowski Reviewed-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfs4proc.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index df38db2eee3b..a4ace14756ac 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3199,6 +3199,11 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, exception.retry = 1; continue; } + if (status == -NFS4ERR_EXPIRED) { + nfs4_schedule_lease_recovery(server->nfs_client); + exception.retry = 1; + continue; + } if (status == -EAGAIN) { /* We must have found a delegation */ exception.retry = 1; -- cgit v1.2.3-59-g8ed1b From 7dc2993a9e51dd2eee955944efec65bef90265b7 Mon Sep 17 00:00:00 2001 From: Robert Milkowski Date: Thu, 30 Jan 2020 09:43:25 +0000 Subject: NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals Currently, each time nfs4_do_fsinfo() is called it will do an implicit NFS4 lease renewal, which is not compliant with the NFS4 specification. This can result in a lease being expired by an NFS server. Commit 83ca7f5ab31f ("NFS: Avoid PUTROOTFH when managing leases") introduced implicit client lease renewal in nfs4_do_fsinfo(), which can result in the NFSv4.0 lease to expire on a server side, and servers returning NFS4ERR_EXPIRED or NFS4ERR_STALE_CLIENTID. This can easily be reproduced by frequently unmounting a sub-mount, then stat'ing it to get it mounted again, which will delay or even completely prevent client from sending RENEW operations if no other NFS operations are issued. Eventually nfs server will expire client's lease and return an error on file access or next RENEW. This can also happen when a sub-mount is automatically unmounted due to inactivity (after nfs_mountpoint_expiry_timeout), then it is mounted again via stat(). This can result in a short window during which client's lease will expire on a server but not on a client. This specific case was observed on production systems. This patch removes the implicit lease renewal from nfs4_do_fsinfo(). Fixes: 83ca7f5ab31f ("NFS: Avoid PUTROOTFH when managing leases") Signed-off-by: Robert Milkowski Signed-off-by: Anna Schumaker --- fs/nfs/nfs4_fs.h | 4 +--- fs/nfs/nfs4proc.c | 12 ++++++++---- fs/nfs/nfs4renewd.c | 5 +---- fs/nfs/nfs4state.c | 4 +--- 4 files changed, 11 insertions(+), 14 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index c3e669dcee0e..8be1ba7c62bb 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -447,9 +447,7 @@ extern void nfs4_schedule_state_renewal(struct nfs_client *); extern void nfs4_renewd_prepare_shutdown(struct nfs_server *); extern void nfs4_kill_renewd(struct nfs_client *); extern void nfs4_renew_state(struct work_struct *); -extern void nfs4_set_lease_period(struct nfs_client *clp, - unsigned long lease, - unsigned long lastrenewed); +extern void nfs4_set_lease_period(struct nfs_client *clp, unsigned long lease); /* nfs4state.c */ diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index a4ace14756ac..95d07a3dc5d1 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5053,16 +5053,13 @@ static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, str struct nfs4_exception exception = { .interruptible = true, }; - unsigned long now = jiffies; int err; do { err = _nfs4_do_fsinfo(server, fhandle, fsinfo); trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); if (err == 0) { - nfs4_set_lease_period(server->nfs_client, - fsinfo->lease_time * HZ, - now); + nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); break; } err = nfs4_handle_exception(server, err, &exception); @@ -6126,6 +6123,7 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, .callback_data = &setclientid, .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, }; + unsigned long now = jiffies; int status; /* nfs_client_id4 */ @@ -6158,6 +6156,9 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); put_rpccred(setclientid.sc_cred); } + + if (status == 0) + do_renew_lease(clp, now); out: trace_nfs4_setclientid(clp, status); dprintk("NFS reply setclientid: %d\n", status); @@ -8245,6 +8246,7 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cre struct rpc_task *task; struct nfs41_exchange_id_args *argp; struct nfs41_exchange_id_res *resp; + unsigned long now = jiffies; int status; task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); @@ -8265,6 +8267,8 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cre if (status != 0) goto out; + do_renew_lease(clp, now); + clp->cl_clientid = resp->clientid; clp->cl_exchange_flags = resp->flags; clp->cl_seqid = resp->seqid; diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c index 6ea431b067dd..ff876dda7f06 100644 --- a/fs/nfs/nfs4renewd.c +++ b/fs/nfs/nfs4renewd.c @@ -138,15 +138,12 @@ nfs4_kill_renewd(struct nfs_client *clp) * * @clp: pointer to nfs_client * @lease: new value for lease period - * @lastrenewed: time at which lease was last renewed */ void nfs4_set_lease_period(struct nfs_client *clp, - unsigned long lease, - unsigned long lastrenewed) + unsigned long lease) { spin_lock(&clp->cl_lock); clp->cl_lease_time = lease; - clp->cl_last_renewal = lastrenewed; spin_unlock(&clp->cl_lock); /* Cap maximum reconnect timeout at 1/2 lease period */ diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 19b473bc560e..f7723d221945 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -92,17 +92,15 @@ static int nfs4_setup_state_renewal(struct nfs_client *clp) { int status; struct nfs_fsinfo fsinfo; - unsigned long now; if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { nfs4_schedule_state_renewal(clp); return 0; } - now = jiffies; status = nfs4_proc_get_lease_time(clp, &fsinfo); if (status == 0) { - nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now); + nfs4_set_lease_period(clp, fsinfo.lease_time * HZ); nfs4_schedule_state_renewal(clp); } -- cgit v1.2.3-59-g8ed1b