diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 9defa12208f9..698c43dd5dc8 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -179,13 +179,16 @@ extern int v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags); -extern struct inode *v9fs_fid_iget(struct super_block *sb, struct p9_fid *fid); +extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses, + struct p9_fid *fid, + struct super_block *sb, int new); extern const struct inode_operations v9fs_dir_inode_operations_dotl; extern const struct inode_operations v9fs_file_inode_operations_dotl; extern const struct inode_operations v9fs_symlink_inode_operations_dotl; extern const struct netfs_request_ops v9fs_req_ops; -extern struct inode *v9fs_fid_iget_dotl(struct super_block *sb, - struct p9_fid *fid); +extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, + struct p9_fid *fid, + struct super_block *sb, int new); /* other default globals */ #define V9FS_PORT 564 @@ -227,9 +230,27 @@ v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, struct super_block *sb) { if (v9fs_proto_dotl(v9ses)) - return v9fs_fid_iget_dotl(sb, fid); + return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 0); else - return v9fs_fid_iget(sb, fid); + return v9fs_inode_from_fid(v9ses, fid, sb, 0); +} + +/** + * v9fs_get_new_inode_from_fid - Helper routine to populate an inode by + * issuing a attribute request + * @v9ses: session information + * @fid: fid to issue attribute request for + * @sb: superblock on which to create inode + * + */ +static inline struct inode * +v9fs_get_new_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + if (v9fs_proto_dotl(v9ses)) + return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 1); + else + return v9fs_inode_from_fid(v9ses, fid, sb, 1); } #endif diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index 7923c3c347cb..d3aefbec4de6 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -42,7 +42,7 @@ struct inode *v9fs_alloc_inode(struct super_block *sb); void v9fs_free_inode(struct inode *inode); void v9fs_set_netfs_context(struct inode *inode); int v9fs_init_inode(struct v9fs_session_info *v9ses, - struct inode *inode, struct p9_qid *qid, umode_t mode, dev_t rdev); + struct inode *inode, umode_t mode, dev_t rdev); void v9fs_evict_inode(struct inode *inode); #if (BITS_PER_LONG == 32) #define QID2INO(q) ((ino_t) (((q)->path+2) ^ (((q)->path) >> 32))) diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 5e05ec7af42e..e9c052b35dd9 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -256,12 +256,9 @@ void v9fs_set_netfs_context(struct inode *inode) } int v9fs_init_inode(struct v9fs_session_info *v9ses, - struct inode *inode, struct p9_qid *qid, umode_t mode, dev_t rdev) + struct inode *inode, umode_t mode, dev_t rdev) { int err = 0; - struct v9fs_inode *v9inode = V9FS_I(inode); - - memcpy(&v9inode->qid, qid, sizeof(struct p9_qid)); inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); inode->i_blocks = 0; @@ -366,40 +363,80 @@ void v9fs_evict_inode(struct inode *inode) clear_inode(inode); } -struct inode *v9fs_fid_iget(struct super_block *sb, struct p9_fid *fid) +static int v9fs_test_inode(struct inode *inode, void *data) +{ + int umode; + dev_t rdev; + struct v9fs_inode *v9inode = V9FS_I(inode); + struct p9_wstat *st = (struct p9_wstat *)data; + struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); + + umode = p9mode2unixmode(v9ses, st, &rdev); + /* don't match inode of different type */ + if (inode_wrong_type(inode, umode)) + return 0; + + /* compare qid details */ + if (memcmp(&v9inode->qid.version, + &st->qid.version, sizeof(v9inode->qid.version))) + return 0; + + if (v9inode->qid.type != st->qid.type) + return 0; + + if (v9inode->qid.path != st->qid.path) + return 0; + return 1; +} + +static int v9fs_test_new_inode(struct inode *inode, void *data) +{ + return 0; +} + +static int v9fs_set_inode(struct inode *inode, void *data) +{ + struct v9fs_inode *v9inode = V9FS_I(inode); + struct p9_wstat *st = (struct p9_wstat *)data; + + memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); + return 0; +} + +static struct inode *v9fs_qid_iget(struct super_block *sb, + struct p9_qid *qid, + struct p9_wstat *st, + int new) { dev_t rdev; int retval; umode_t umode; struct inode *inode; - struct p9_wstat *st; struct v9fs_session_info *v9ses = sb->s_fs_info; + int (*test)(struct inode *inode, void *data); - inode = iget_locked(sb, QID2INO(&fid->qid)); - if (unlikely(!inode)) + if (new) + test = v9fs_test_new_inode; + else + test = v9fs_test_inode; + + inode = iget5_locked(sb, QID2INO(qid), test, v9fs_set_inode, st); + if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; - /* * initialize the inode with the stat info * FIXME!! we may need support for stale inodes * later. */ - st = p9_client_stat(fid); - if (IS_ERR(st)) { - retval = PTR_ERR(st); - goto error; - } - + inode->i_ino = QID2INO(qid); umode = p9mode2unixmode(v9ses, st, &rdev); - retval = v9fs_init_inode(v9ses, inode, &fid->qid, umode, rdev); - v9fs_stat2inode(st, inode, sb, 0); - p9stat_free(st); - kfree(st); + retval = v9fs_init_inode(v9ses, inode, umode, rdev); if (retval) goto error; + v9fs_stat2inode(st, inode, sb, 0); v9fs_set_netfs_context(inode); v9fs_cache_inode_get_cookie(inode); unlock_new_inode(inode); @@ -410,6 +447,23 @@ error: } +struct inode * +v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb, int new) +{ + struct p9_wstat *st; + struct inode *inode = NULL; + + st = p9_client_stat(fid); + if (IS_ERR(st)) + return ERR_CAST(st); + + inode = v9fs_qid_iget(sb, &st->qid, st, new); + p9stat_free(st); + kfree(st); + return inode; +} + /** * v9fs_at_to_dotl_flags- convert Linux specific AT flags to * plan 9 AT flag. @@ -556,7 +610,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, /* * instantiate inode and assign the unopened fid to the dentry */ - inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); + inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); p9_debug(P9_DEBUG_VFS, @@ -684,8 +738,10 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, inode = NULL; else if (IS_ERR(fid)) inode = ERR_CAST(fid); - else + else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); + else + inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); /* * If we had a rename on the server and a parallel lookup * for the new name, then make sure we instantiate with diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index ef9db3e03506..143ac03b7425 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -52,33 +52,76 @@ static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) return current_fsgid(); } -struct inode *v9fs_fid_iget_dotl(struct super_block *sb, struct p9_fid *fid) +static int v9fs_test_inode_dotl(struct inode *inode, void *data) +{ + struct v9fs_inode *v9inode = V9FS_I(inode); + struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; + + /* don't match inode of different type */ + if (inode_wrong_type(inode, st->st_mode)) + return 0; + + if (inode->i_generation != st->st_gen) + return 0; + + /* compare qid details */ + if (memcmp(&v9inode->qid.version, + &st->qid.version, sizeof(v9inode->qid.version))) + return 0; + + if (v9inode->qid.type != st->qid.type) + return 0; + + if (v9inode->qid.path != st->qid.path) + return 0; + return 1; +} + +/* Always get a new inode */ +static int v9fs_test_new_inode_dotl(struct inode *inode, void *data) +{ + return 0; +} + +static int v9fs_set_inode_dotl(struct inode *inode, void *data) +{ + struct v9fs_inode *v9inode = V9FS_I(inode); + struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; + + memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); + inode->i_generation = st->st_gen; + return 0; +} + +static struct inode *v9fs_qid_iget_dotl(struct super_block *sb, + struct p9_qid *qid, + struct p9_fid *fid, + struct p9_stat_dotl *st, + int new) { int retval; struct inode *inode; - struct p9_stat_dotl *st; struct v9fs_session_info *v9ses = sb->s_fs_info; + int (*test)(struct inode *inode, void *data); - inode = iget_locked(sb, QID2INO(&fid->qid)); - if (unlikely(!inode)) + if (new) + test = v9fs_test_new_inode_dotl; + else + test = v9fs_test_inode_dotl; + + inode = iget5_locked(sb, QID2INO(qid), test, v9fs_set_inode_dotl, st); + if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; - /* * initialize the inode with the stat info * FIXME!! we may need support for stale inodes * later. */ - st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN); - if (IS_ERR(st)) { - retval = PTR_ERR(st); - goto error; - } - - retval = v9fs_init_inode(v9ses, inode, &fid->qid, + inode->i_ino = QID2INO(qid); + retval = v9fs_init_inode(v9ses, inode, st->st_mode, new_decode_dev(st->st_rdev)); - kfree(st); if (retval) goto error; @@ -90,7 +133,6 @@ struct inode *v9fs_fid_iget_dotl(struct super_block *sb, struct p9_fid *fid) goto error; unlock_new_inode(inode); - return inode; error: iget_failed(inode); @@ -98,6 +140,22 @@ error: } +struct inode * +v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb, int new) +{ + struct p9_stat_dotl *st; + struct inode *inode = NULL; + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN); + if (IS_ERR(st)) + return ERR_CAST(st); + + inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new); + kfree(st); + return inode; +} + struct dotl_openflag_map { int open_flag; int dotl_flag; @@ -247,7 +305,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry, p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); goto out; } - inode = v9fs_fid_iget_dotl(dir->i_sb, fid); + inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err); @@ -342,7 +400,7 @@ static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap, } /* instantiate inode and assign the unopened fid to the dentry */ - inode = v9fs_fid_iget_dotl(dir->i_sb, fid); + inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", @@ -780,7 +838,7 @@ v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir, err); goto error; } - inode = v9fs_fid_iget_dotl(dir->i_sb, fid); + inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 55e67e36ae68..489db161abc9 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -139,7 +139,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags, else sb->s_d_op = &v9fs_dentry_operations; - inode = v9fs_get_inode_from_fid(v9ses, fid, sb); + inode = v9fs_get_new_inode_from_fid(v9ses, fid, sb); if (IS_ERR(inode)) { retval = PTR_ERR(inode); goto release_sb;