diff options
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4_fs.h | 7 | ||||
| -rw-r--r-- | fs/nfs/nfs4file.c | 94 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 5 |
3 files changed, 103 insertions, 3 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 8e590b424d75..5f279425ee77 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -311,6 +311,13 @@ extern int nfs4_set_rw_stateid(nfs4_stateid *stateid, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, fmode_t fmode); +extern int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fattr *fattr, struct nfs4_label *label, + struct inode *inode); +extern int update_open_stateid(struct nfs4_state *state, + const nfs4_stateid *open_stateid, + const nfs4_stateid *deleg_stateid, + fmode_t fmode); extern int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo); diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index b68b41be6d9f..1898262a2cb1 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -8,6 +8,7 @@ #include <linux/file.h> #include <linux/falloc.h> #include <linux/nfs_fs.h> +#include <linux/file.h> #include "delegation.h" #include "internal.h" #include "iostat.h" @@ -286,6 +287,99 @@ out_unlock: out: return ret < 0 ? ret : count; } + +static int read_name_gen = 1; +#define SSC_READ_NAME_BODY "ssc_read_%d" + +struct file * +nfs42_ssc_open(struct vfsmount *ss_mnt, struct nfs_fh *src_fh, + nfs4_stateid *stateid) +{ + struct nfs_fattr fattr; + struct file *filep, *res; + struct nfs_server *server; + struct inode *r_ino = NULL; + struct nfs_open_context *ctx; + struct nfs4_state_owner *sp; + char *read_name; + int len, status = 0; + + server = NFS_SERVER(ss_mnt->mnt_root->d_inode); + + nfs_fattr_init(&fattr); + + status = nfs4_proc_getattr(server, src_fh, &fattr, NULL, NULL); + if (status < 0) { + res = ERR_PTR(status); + goto out; + } + + res = ERR_PTR(-ENOMEM); + len = strlen(SSC_READ_NAME_BODY) + 16; + read_name = kzalloc(len, GFP_NOFS); + if (read_name == NULL) + goto out; + snprintf(read_name, len, SSC_READ_NAME_BODY, read_name_gen++); + + r_ino = nfs_fhget(ss_mnt->mnt_root->d_inode->i_sb, src_fh, &fattr, + NULL); + if (IS_ERR(r_ino)) { + res = ERR_CAST(r_ino); + goto out; + } + + filep = alloc_file_pseudo(r_ino, ss_mnt, read_name, FMODE_READ, + r_ino->i_fop); + if (IS_ERR(filep)) { + res = ERR_CAST(filep); + goto out; + } + filep->f_mode |= FMODE_READ; + + ctx = alloc_nfs_open_context(filep->f_path.dentry, filep->f_mode, + filep); + if (IS_ERR(ctx)) { + res = ERR_CAST(ctx); + goto out_filep; + } + + res = ERR_PTR(-EINVAL); + sp = nfs4_get_state_owner(server, ctx->cred, GFP_KERNEL); + if (sp == NULL) + goto out_ctx; + + ctx->state = nfs4_get_open_state(r_ino, sp); + if (ctx->state == NULL) + goto out_stateowner; + + set_bit(NFS_OPEN_STATE, &ctx->state->flags); + memcpy(&ctx->state->open_stateid.other, &stateid->other, + NFS4_STATEID_OTHER_SIZE); + update_open_stateid(ctx->state, stateid, NULL, filep->f_mode); + + nfs_file_set_open_context(filep, ctx); + put_nfs_open_context(ctx); + + file_ra_state_init(&filep->f_ra, filep->f_mapping->host->i_mapping); + res = filep; +out: + return res; +out_stateowner: + nfs4_put_state_owner(sp); +out_ctx: + put_nfs_open_context(ctx); +out_filep: + fput(filep); + goto out; +} +EXPORT_SYMBOL_GPL(nfs42_ssc_open); +void nfs42_ssc_close(struct file *filep) +{ + struct nfs_open_context *ctx = nfs_file_open_context(filep); + + ctx->state->flags = 0; +} +EXPORT_SYMBOL_GPL(nfs42_ssc_close); #endif /* CONFIG_NFS_V4_2 */ const struct file_operations nfs4_file_operations = { diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 505045b47670..f3a1f8d8e447 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -91,7 +91,6 @@ struct nfs4_opendata; static int _nfs4_recover_proc_open(struct nfs4_opendata *data); static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); -static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label, struct inode *inode); static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, struct nfs_fattr *fattr, struct iattr *sattr, @@ -1718,7 +1717,7 @@ static void nfs_state_clear_delegation(struct nfs4_state *state) write_sequnlock(&state->seqlock); } -static int update_open_stateid(struct nfs4_state *state, +int update_open_stateid(struct nfs4_state *state, const nfs4_stateid *open_stateid, const nfs4_stateid *delegation, fmode_t fmode) @@ -4065,7 +4064,7 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } -static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, +int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode) { |