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(-) 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