diff options
| -rw-r--r-- | fs/9p/Makefile | 1 | ||||
| -rw-r--r-- | fs/9p/v9fs.h | 42 | ||||
| -rw-r--r-- | fs/9p/vfs_inode.c | 865 | ||||
| -rw-r--r-- | fs/9p/vfs_inode_dotl.c | 870 |
4 files changed, 916 insertions, 862 deletions
diff --git a/fs/9p/Makefile b/fs/9p/Makefile index f8ba37e..ab8c127 100644 --- a/fs/9p/Makefile +++ b/fs/9p/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_9P_FS) := 9p.o 9p-objs := \ vfs_super.o \ vfs_inode.o \ + vfs_inode_dotl.o \ vfs_addr.o \ vfs_file.o \ vfs_dir.o \ diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index cb63968..c4b5d88 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -113,9 +113,27 @@ struct v9fs_session_info { struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *, char *); -void v9fs_session_close(struct v9fs_session_info *v9ses); -void v9fs_session_cancel(struct v9fs_session_info *v9ses); -void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses); +extern void v9fs_session_close(struct v9fs_session_info *v9ses); +extern void v9fs_session_cancel(struct v9fs_session_info *v9ses); +extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses); +extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nameidata); +extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d); +extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d); +extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry); +extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, + void *p); +extern struct inode *v9fs_inode(struct v9fs_session_info *v9ses, + struct p9_fid *fid, + struct super_block *sb); + +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 struct inode *v9fs_inode_dotl(struct v9fs_session_info *v9ses, + struct p9_fid *fid, + struct super_block *sb); /* other default globals */ #define V9FS_PORT 564 @@ -138,3 +156,21 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses) { return v9ses->flags & V9FS_PROTO_2000L; } + +/** + * v9fs_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_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + if (v9fs_proto_dotl(v9ses)) + return v9fs_inode_dotl(v9ses, fid, sb); + else + return v9fs_inode(v9ses, fid, sb); +} diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 5978298..3923586 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -49,15 +49,8 @@ static const struct inode_operations v9fs_dir_inode_operations; static const struct inode_operations v9fs_dir_inode_operations_dotu; -static const struct inode_operations v9fs_dir_inode_operations_dotl; static const struct inode_operations v9fs_file_inode_operations; -static const struct inode_operations v9fs_file_inode_operations_dotl; static const struct inode_operations v9fs_symlink_inode_operations; -static const struct inode_operations v9fs_symlink_inode_operations_dotl; - -static int -v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, - dev_t rdev); /** * unixmode2p9mode - convert unix mode bits to plan 9 @@ -251,41 +244,6 @@ void v9fs_destroy_inode(struct inode *inode) #endif /** - * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a - * new file system object. This checks the S_ISGID to determine the owning - * group of the new file system object. - */ - -static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) -{ - BUG_ON(dir_inode == NULL); - - if (dir_inode->i_mode & S_ISGID) { - /* set_gid bit is set.*/ - return dir_inode->i_gid; - } - return current_fsgid(); -} - -/** - * v9fs_dentry_from_dir_inode - helper function to get the dentry from - * dir inode. - * - */ - -static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) -{ - struct dentry *dentry; - - spin_lock(&inode->i_lock); - /* Directory should have only one entry. */ - BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); - dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); - spin_unlock(&inode->i_lock); - return dentry; -} - -/** * v9fs_get_inode - helper function to setup an inode * @sb: superblock * @mode: mode to setup inode with @@ -454,7 +412,7 @@ void v9fs_evict_inode(struct inode *inode) #endif } -static struct inode * +struct inode * v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, struct super_block *sb) { @@ -489,60 +447,6 @@ error: return ERR_PTR(err); } -static struct inode * -v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, - struct super_block *sb) -{ - struct inode *ret = NULL; - int err; - struct p9_stat_dotl *st; - - st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); - if (IS_ERR(st)) - return ERR_CAST(st); - - ret = v9fs_get_inode(sb, st->st_mode); - if (IS_ERR(ret)) { - err = PTR_ERR(ret); - goto error; - } - - v9fs_stat2inode_dotl(st, ret); - ret->i_ino = v9fs_qid2ino(&st->qid); -#ifdef CONFIG_9P_FSCACHE - v9fs_vcookie_set_qid(ret, &st->qid); - v9fs_cache_inode_get_cookie(ret); -#endif - err = v9fs_get_acl(ret, fid); - if (err) { - iput(ret); - goto error; - } - kfree(st); - return ret; -error: - kfree(st); - return ERR_PTR(err); -} - -/** - * v9fs_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_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, - struct super_block *sb) -{ - if (v9fs_proto_dotl(v9ses)) - return v9fs_inode_dotl(v9ses, fid, sb); - else - return v9fs_inode(v9ses, fid, sb); -} - /** * v9fs_remove - helper function to remove files and directories * @dir: directory inode that is being deleted @@ -657,144 +561,6 @@ error: } /** - * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. - * @dir: directory inode that is being created - * @dentry: dentry that is being deleted - * @mode: create permissions - * @nd: path information - * - */ - -static int -v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, - struct nameidata *nd) -{ - int err = 0; - char *name = NULL; - gid_t gid; - int flags; - mode_t mode; - struct v9fs_session_info *v9ses; - struct p9_fid *fid = NULL; - struct p9_fid *dfid, *ofid; - struct file *filp; - struct p9_qid qid; - struct inode *inode; - struct posix_acl *pacl = NULL, *dacl = NULL; - - v9ses = v9fs_inode2v9ses(dir); - if (nd && nd->flags & LOOKUP_OPEN) - flags = nd->intent.open.flags - 1; - else { - /* - * create call without LOOKUP_OPEN is due - * to mknod of regular files. So use mknod - * operation. - */ - return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); - } - - name = (char *) dentry->d_name.name; - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " - "mode:0x%x\n", name, flags, omode); - - dfid = v9fs_fid_lookup(dentry->d_parent); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - return err; - } - - /* clone a fid to use for creation */ - ofid = p9_client_walk(dfid, 0, NULL, 1); - if (IS_ERR(ofid)) { - err = PTR_ERR(ofid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); - return err; - } - - gid = v9fs_get_fsgid_for_create(dir); - - mode = omode; - /* Update mode based on ACL value */ - err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); - if (err) { - P9_DPRINTK(P9_DEBUG_VFS, - "Failed to get acl values in creat %d\n", err); - goto error; - } - err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); - if (err < 0) { - P9_DPRINTK(P9_DEBUG_VFS, - "p9_client_open_dotl failed in creat %d\n", - err); - goto error; - } - /* instantiate inode and assign the unopened fid to the dentry */ - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE || - (nd && nd->flags & LOOKUP_OPEN)) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - d_set_d_op(dentry, &v9fs_cached_dentry_operations); - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - /* The fid would get clunked via a dput */ - fid = NULL; - } else { - /* - * Not in cached mode. No need to populate - * inode with stat. We need to get an inode - * so that we can set the acl with dentry - */ - inode = v9fs_get_inode(dir->i_sb, mode); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - goto error; - } - d_set_d_op(dentry, &v9fs_dentry_operations); - d_instantiate(dentry, inode); - } - /* Now set the ACL based on the default value */ - v9fs_set_create_acl(dentry, dacl, pacl); - - /* if we are opening a file, assign the open fid to the file */ - if (nd && nd->flags & LOOKUP_OPEN) { - filp = lookup_instantiate_filp(nd, dentry, generic_file_open); - if (IS_ERR(filp)) { - p9_client_clunk(ofid); - return PTR_ERR(filp); - } - filp->private_data = ofid; - } else - p9_client_clunk(ofid); - - return 0; - -error: - if (ofid) - p9_client_clunk(ofid); - if (fid) - p9_client_clunk(fid); - return err; -} - -/** * v9fs_vfs_create - VFS hook to create files * @dir: directory inode that is being created * @dentry: dentry that is being deleted @@ -884,107 +650,6 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) return err; } - -/** - * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory - * @dir: inode that is being unlinked - * @dentry: dentry that is being unlinked - * @mode: mode for new directory - * - */ - -static int v9fs_vfs_mkdir_dotl(struct inode *dir, - struct dentry *dentry, int omode) -{ - int err; - struct v9fs_session_info *v9ses; - struct p9_fid *fid = NULL, *dfid = NULL; - gid_t gid; - char *name; - mode_t mode; - struct inode *inode; - struct p9_qid qid; - struct dentry *dir_dentry; - struct posix_acl *dacl = NULL, *pacl = NULL; - - P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); - err = 0; - v9ses = v9fs_inode2v9ses(dir); - - omode |= S_IFDIR; - if (dir->i_mode & S_ISGID) - omode |= S_ISGID; - - dir_dentry = v9fs_dentry_from_dir_inode(dir); - dfid = v9fs_fid_lookup(dir_dentry); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - dfid = NULL; - goto error; - } - - gid = v9fs_get_fsgid_for_create(dir); - mode = omode; - /* Update mode based on ACL value */ - err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); - if (err) { - P9_DPRINTK(P9_DEBUG_VFS, - "Failed to get acl values in mkdir %d\n", err); - goto error; - } - name = (char *) dentry->d_name.name; - err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); - if (err < 0) - goto error; - - /* instantiate inode and assign the unopened fid to the dentry */ - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - d_set_d_op(dentry, &v9fs_cached_dentry_operations); - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - fid = NULL; - } else { - /* - * Not in cached mode. No need to populate - * inode with stat. We need to get an inode - * so that we can set the acl with dentry - */ - inode = v9fs_get_inode(dir->i_sb, mode); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - goto error; - } - d_set_d_op(dentry, &v9fs_dentry_operations); - d_instantiate(dentry, inode); - } - /* Now set the ACL based on the default value */ - v9fs_set_create_acl(dentry, dacl, pacl); - -error: - if (fid) - p9_client_clunk(fid); - return err; -} - /** * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode * @dir: inode that is being walked from @@ -993,7 +658,7 @@ error: * */ -static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, +struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nameidata) { struct super_block *sb; @@ -1063,7 +728,7 @@ error: * */ -static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) +int v9fs_vfs_unlink(struct inode *i, struct dentry *d) { return v9fs_remove(i, d, 0); } @@ -1075,7 +740,7 @@ static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) * */ -static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) +int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) { return v9fs_remove(i, d, 1); } @@ -1089,7 +754,7 @@ static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) * */ -static int +int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { @@ -1196,42 +861,6 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, return 0; } -static int -v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, - struct kstat *stat) -{ - int err; - struct v9fs_session_info *v9ses; - struct p9_fid *fid; - struct p9_stat_dotl *st; - - P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); - err = -EPERM; - v9ses = v9fs_inode2v9ses(dentry->d_inode); - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) - return simple_getattr(mnt, dentry, stat); - - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - /* Ask for all the fields in stat structure. Server will return - * whatever it supports - */ - - st = p9_client_getattr_dotl(fid, P9_STATS_ALL); - if (IS_ERR(st)) - return PTR_ERR(st); - - v9fs_stat2inode_dotl(st, dentry->d_inode); - generic_fillattr(dentry->d_inode, stat); - /* Change block size to what the server returned */ - stat->blksize = st->st_blksize; - - kfree(st); - return 0; -} - /** * v9fs_vfs_setattr - set file metadata * @dentry: file whose metadata to set @@ -1291,64 +920,6 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) } /** - * v9fs_vfs_setattr_dotl - set file metadata - * @dentry: file whose metadata to set - * @iattr: metadata assignment structure - * - */ - -int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) -{ - int retval; - struct v9fs_session_info *v9ses; - struct p9_fid *fid; - struct p9_iattr_dotl p9attr; - - P9_DPRINTK(P9_DEBUG_VFS, "\n"); - - retval = inode_change_ok(dentry->d_inode, iattr); - if (retval) - return retval; - - p9attr.valid = iattr->ia_valid; - p9attr.mode = iattr->ia_mode; - p9attr.uid = iattr->ia_uid; - p9attr.gid = iattr->ia_gid; - p9attr.size = iattr->ia_size; - p9attr.atime_sec = iattr->ia_atime.tv_sec; - p9attr.atime_nsec = iattr->ia_atime.tv_nsec; - p9attr.mtime_sec = iattr->ia_mtime.tv_sec; - p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; - - retval = -EPERM; - v9ses = v9fs_inode2v9ses(dentry->d_inode); - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - retval = p9_client_setattr(fid, &p9attr); - if (retval < 0) - return retval; - - if ((iattr->ia_valid & ATTR_SIZE) && - iattr->ia_size != i_size_read(dentry->d_inode)) { - retval = vmtruncate(dentry->d_inode, iattr->ia_size); - if (retval) - return retval; - } - - setattr_copy(dentry->d_inode, iattr); - mark_inode_dirty(dentry->d_inode); - if (iattr->ia_valid & ATTR_MODE) { - /* We also want to update ACL when we update mode bits */ - retval = v9fs_acl_chmod(dentry); - if (retval < 0) - return retval; - } - return 0; -} - -/** * v9fs_stat2inode - populate an inode structure with mistat info * @stat: Plan 9 metadata (mistat) structure * @inode: inode to populate @@ -1426,77 +997,6 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, } /** - * v9fs_stat2inode_dotl - populate an inode structure with stat info - * @stat: stat structure - * @inode: inode to populate - * @sb: superblock of filesystem - * - */ - -void -v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) -{ - - if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { - inode->i_atime.tv_sec = stat->st_atime_sec; - inode->i_atime.tv_nsec = stat->st_atime_nsec; - inode->i_mtime.tv_sec = stat->st_mtime_sec; - inode->i_mtime.tv_nsec = stat->st_mtime_nsec; - inode->i_ctime.tv_sec = stat->st_ctime_sec; - inode->i_ctime.tv_nsec = stat->st_ctime_nsec; - inode->i_uid = stat->st_uid; - inode->i_gid = stat->st_gid; - inode->i_nlink = stat->st_nlink; - inode->i_mode = stat->st_mode; - inode->i_rdev = new_decode_dev(stat->st_rdev); - - if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) - init_special_inode(inode, inode->i_mode, inode->i_rdev); - - i_size_write(inode, stat->st_size); - inode->i_blocks = stat->st_blocks; - } else { - if (stat->st_result_mask & P9_STATS_ATIME) { - inode->i_atime.tv_sec = stat->st_atime_sec; - inode->i_atime.tv_nsec = stat->st_atime_nsec; - } - if (stat->st_result_mask & P9_STATS_MTIME) { - inode->i_mtime.tv_sec = stat->st_mtime_sec; - inode->i_mtime.tv_nsec = stat->st_mtime_nsec; - } - if (stat->st_result_mask & P9_STATS_CTIME) { - inode->i_ctime.tv_sec = stat->st_ctime_sec; - inode->i_ctime.tv_nsec = stat->st_ctime_nsec; - } - if (stat->st_result_mask & P9_STATS_UID) - inode->i_uid = stat->st_uid; - if (stat->st_result_mask & P9_STATS_GID) - inode->i_gid = stat->st_gid; - if (stat->st_result_mask & P9_STATS_NLINK) - inode->i_nlink = stat->st_nlink; - if (stat->st_result_mask & P9_STATS_MODE) { - inode->i_mode = stat->st_mode; - if ((S_ISBLK(inode->i_mode)) || - (S_ISCHR(inode->i_mode))) - init_special_inode(inode, inode->i_mode, - inode->i_rdev); - } - if (stat->st_result_mask & P9_STATS_RDEV) - inode->i_rdev = new_decode_dev(stat->st_rdev); - if (stat->st_result_mask & P9_STATS_SIZE) - i_size_write(inode, stat->st_size); - if (stat->st_result_mask & P9_STATS_BLOCKS) - inode->i_blocks = stat->st_blocks; - } - if (stat->st_result_mask & P9_STATS_GEN) - inode->i_generation = stat->st_gen; - - /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION - * because the inode structure does not have fields for them. - */ -} - -/** * v9fs_qid2ino - convert qid into inode number * @qid: qid to hash * @@ -1602,7 +1102,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) * */ -static void +void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) { char *s = nd_get_link(nd); @@ -1646,94 +1146,6 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, } /** - * v9fs_vfs_symlink_dotl - helper function to create symlinks - * @dir: directory inode containing symlink - * @dentry: dentry for symlink - * @symname: symlink data - * - * See Also: 9P2000.L RFC for more information - * - */ - -static int -v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, - const char *symname) -{ - struct v9fs_session_info *v9ses; - struct p9_fid *dfid; - struct p9_fid *fid = NULL; - struct inode *inode; - struct p9_qid qid; - char *name; - int err; - gid_t gid; - - name = (char *) dentry->d_name.name; - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", - dir->i_ino, name, symname); - v9ses = v9fs_inode2v9ses(dir); - - dfid = v9fs_fid_lookup(dentry->d_parent); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - return err; - } - - gid = v9fs_get_fsgid_for_create(dir); - - /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ - err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); - - if (err < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); - goto error; - } - - if (v9ses->cache) { - /* Now walk from the parent so we can get an unopened fid. */ - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - /* instantiate inode and assign the unopened fid to dentry */ - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - d_set_d_op(dentry, &v9fs_cached_dentry_operations); - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - fid = NULL; - } else { - /* Not in cached mode. No need to populate inode with stat */ - inode = v9fs_get_inode(dir->i_sb, S_IFLNK); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - goto error; - } - d_set_d_op(dentry, &v9fs_dentry_operations); - d_instantiate(dentry, inode); - } - -error: - if (fid) - p9_client_clunk(fid); - - return err; -} - -/** * v9fs_vfs_symlink - helper function to create symlinks * @dir: directory inode containing symlink * @dentry: dentry for symlink @@ -1792,77 +1204,6 @@ clunk_fid: } /** - * v9fs_vfs_link_dotl - create a hardlink for dotl - * @old_dentry: dentry for file to link to - * @dir: inode destination for new link - * @dentry: dentry for link - * - */ - -static int -v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry) -{ - int err; - struct p9_fid *dfid, *oldfid; - char *name; - struct v9fs_session_info *v9ses; - struct dentry *dir_dentry; - - P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", - dir->i_ino, old_dentry->d_name.name, - dentry->d_name.name); - - v9ses = v9fs_inode2v9ses(dir); - dir_dentry = v9fs_dentry_from_dir_inode(dir); - dfid = v9fs_fid_lookup(dir_dentry); - if (IS_ERR(dfid)) - return PTR_ERR(dfid); - - oldfid = v9fs_fid_lookup(old_dentry); - if (IS_ERR(oldfid)) - return PTR_ERR(oldfid); - - name = (char *) dentry->d_name.name; - - err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); - - if (err < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); - return err; - } - - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - /* Get the latest stat info from server. */ - struct p9_fid *fid; - struct p9_stat_dotl *st; - - fid = v9fs_fid_lookup(old_dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); - if (IS_ERR(st)) - return PTR_ERR(st); - - v9fs_stat2inode_dotl(st, old_dentry->d_inode); - - kfree(st); - } else { - /* Caching disabled. No need to get upto date stat info. - * This dentry will be released immediately. So, just hold the - * inode - */ - ihold(old_dentry->d_inode); - } - - d_set_d_op(dentry, old_dentry->d_op); - d_instantiate(dentry, old_dentry->d_inode); - - return err; -} - -/** * v9fs_vfs_mknod - create a special file * @dir: inode destination for new link * @dentry: dentry for file @@ -1907,160 +1248,6 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) return retval; } -/** - * v9fs_vfs_mknod_dotl - create a special file - * @dir: inode destination for new link - * @dentry: dentry for file - * @mode: mode for creation - * @rdev: device associated with special file - * - */ -static int -v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, - dev_t rdev) -{ - int err; - char *name; - mode_t mode; - struct v9fs_session_info *v9ses; - struct p9_fid *fid = NULL, *dfid = NULL; - struct inode *inode; - gid_t gid; - struct p9_qid qid; - struct dentry *dir_dentry; - struct posix_acl *dacl = NULL, *pacl = NULL; - - P9_DPRINTK(P9_DEBUG_VFS, - " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, - dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); - - if (!new_valid_dev(rdev)) - return -EINVAL; - - v9ses = v9fs_inode2v9ses(dir); - dir_dentry = v9fs_dentry_from_dir_inode(dir); - dfid = v9fs_fid_lookup(dir_dentry); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - dfid = NULL; - goto error; - } - - gid = v9fs_get_fsgid_for_create(dir); - mode = omode; - /* Update mode based on ACL value */ - err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); - if (err) { - P9_DPRINTK(P9_DEBUG_VFS, - "Failed to get acl values in mknod %d\n", err); - goto error; - } - name = (char *) dentry->d_name.name; - - err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); - if (err < 0) - goto error; - - /* instantiate inode and assign the unopened fid to the dentry */ - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - d_set_d_op(dentry, &v9fs_cached_dentry_operations); - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - fid = NULL; - } else { - /* - * Not in cached mode. No need to populate inode with stat. - * socket syscall returns a fd, so we need instantiate - */ - inode = v9fs_get_inode(dir->i_sb, mode); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - goto error; - } - d_set_d_op(dentry, &v9fs_dentry_operations); - d_instantiate(dentry, inode); - } - /* Now set the ACL based on the default value */ - v9fs_set_create_acl(dentry, dacl, pacl); -error: - if (fid) - p9_client_clunk(fid); - return err; -} - -static int -v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen) -{ - int retval; - struct p9_fid *fid; - char *target = NULL; - - P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); - retval = -EPERM; - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - retval = p9_client_readlink(fid, &target); - if (retval < 0) - return retval; - - strncpy(buffer, target, buflen); - P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer); - - retval = strnlen(buffer, buflen); - return retval; -} - -/** - * v9fs_vfs_follow_link_dotl - follow a symlink path - * @dentry: dentry for symlink - * @nd: nameidata - * - */ - -static void * -v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) -{ - int len = 0; - char *link = __getname(); - - P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); - - if (!link) - link = ERR_PTR(-ENOMEM); - else { - len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX); - if (len < 0) { - __putname(link); - link = ERR_PTR(len); - } else - link[min(len, PATH_MAX-1)] = 0; - } - nd_set_link(nd, link); - - return NULL; -} - static const struct inode_operations v9fs_dir_inode_operations_dotu = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, @@ -2075,25 +1262,6 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = { .setattr = v9fs_vfs_setattr, }; -static const struct inode_operations v9fs_dir_inode_operations_dotl = { - .create = v9fs_vfs_create_dotl, - .lookup = v9fs_vfs_lookup, - .link = v9fs_vfs_link_dotl, - .symlink = v9fs_vfs_symlink_dotl, - .unlink = v9fs_vfs_unlink, - .mkdir = v9fs_vfs_mkdir_dotl, - .rmdir = v9fs_vfs_rmdir, - .mknod = v9fs_vfs_mknod_dotl, - .rename = v9fs_vfs_rename, - .getattr = v9fs_vfs_getattr_dotl, - .setattr = v9fs_vfs_setattr_dotl, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, - .removexattr = generic_removexattr, - .listxattr = v9fs_listxattr, - .check_acl = v9fs_check_acl, -}; - static const struct inode_operations v9fs_dir_inode_operations = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, @@ -2111,16 +1279,6 @@ static const struct inode_operations v9fs_file_inode_operations = { .setattr = v9fs_vfs_setattr, }; -static const struct inode_operations v9fs_file_inode_operations_dotl = { - .getattr = v9fs_vfs_getattr_dotl, - .setattr = v9fs_vfs_setattr_dotl, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, - .removexattr = generic_removexattr, - .listxattr = v9fs_listxattr, - .check_acl = v9fs_check_acl, -}; - static const struct inode_operations v9fs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = v9fs_vfs_follow_link, @@ -2129,14 +1287,3 @@ static const struct inode_operations v9fs_symlink_inode_operations = { .setattr = v9fs_vfs_setattr, }; -static const struct inode_operations v9fs_symlink_inode_operations_dotl = { - .readlink = v9fs_vfs_readlink_dotl, - .follow_link = v9fs_vfs_follow_link_dotl, - .put_link = v9fs_vfs_put_link, - .getattr = v9fs_vfs_getattr_dotl, - .setattr = v9fs_vfs_setattr_dotl, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, - .removexattr = generic_removexattr, - .listxattr = v9fs_listxattr, -}; diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c new file mode 100644 index 0000000..daf2f06 --- /dev/null +++ b/fs/9p/vfs_inode_dotl.c @@ -0,0 +1,870 @@ +/* + * linux/fs/9p/vfs_inode_dotl.c + * + * This file contains vfs inode ops for the 9P2000.L protocol. + * + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/file.h> +#include <linux/pagemap.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/inet.h> +#include <linux/namei.h> +#include <linux/idr.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/xattr.h> +#include <linux/posix_acl.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> + +#include "v9fs.h" +#include "v9fs_vfs.h" +#include "fid.h" +#include "cache.h" +#include "xattr.h" +#include "acl.h" + +static int +v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, + dev_t rdev); + +/** + * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a + * new file system object. This checks the S_ISGID to determine the owning + * group of the new file system object. + */ + +static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) +{ + BUG_ON(dir_inode == NULL); + + if (dir_inode->i_mode & S_ISGID) { + /* set_gid bit is set.*/ + return dir_inode->i_gid; + } + return current_fsgid(); +} + +/** + * v9fs_dentry_from_dir_inode - helper function to get the dentry from + * dir inode. + * + */ + +static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) +{ + struct dentry *dentry; + + spin_lock(&inode->i_lock); + /* Directory should have only one entry. */ + BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); + dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); + spin_unlock(&inode->i_lock); + return dentry; +} + +struct inode * +v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + struct inode *ret = NULL; + int err; + struct p9_stat_dotl *st; + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) + return ERR_CAST(st); + + ret = v9fs_get_inode(sb, st->st_mode); + if (IS_ERR(ret)) { + err = PTR_ERR(ret); + goto error; + } + + v9fs_stat2inode_dotl(st, ret); + ret->i_ino = v9fs_qid2ino(&st->qid); +#ifdef CONFIG_9P_FSCACHE + v9fs_vcookie_set_qid(ret, &st->qid); + v9fs_cache_inode_get_cookie(ret); +#endif + err = v9fs_get_acl(ret, fid); + if (err) { + iput(ret); + goto error; + } + kfree(st); + return ret; +error: + kfree(st); + return ERR_PTR(err); +} + +/** + * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. + * @dir: directory inode that is being created + * @dentry: dentry that is being deleted + * @mode: create permissions + * @nd: path information + * + */ + +static int +v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, + struct nameidata *nd) +{ + int err = 0; + char *name = NULL; + gid_t gid; + int flags; + mode_t mode; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL; + struct p9_fid *dfid, *ofid; + struct file *filp; + struct p9_qid qid; + struct inode *inode; + struct posix_acl *pacl = NULL, *dacl = NULL; + + v9ses = v9fs_inode2v9ses(dir); + if (nd && nd->flags & LOOKUP_OPEN) + flags = nd->intent.open.flags - 1; + else { + /* + * create call without LOOKUP_OPEN is due + * to mknod of regular files. So use mknod + * operation. + */ + return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); + } + + name = (char *) dentry->d_name.name; + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " + "mode:0x%x\n", name, flags, omode); + + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + return err; + } + + /* clone a fid to use for creation */ + ofid = p9_client_walk(dfid, 0, NULL, 1); + if (IS_ERR(ofid)) { + err = PTR_ERR(ofid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); + return err; + } + + gid = v9fs_get_fsgid_for_create(dir); + + mode = omode; + /* Update mode based on ACL value */ + err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); + if (err) { + P9_DPRINTK(P9_DEBUG_VFS, + "Failed to get acl values in creat %d\n", err); + goto error; + } + err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, + "p9_client_open_dotl failed in creat %d\n", + err); + goto error; + } + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE || + (nd && nd->flags & LOOKUP_OPEN)) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_set_d_op(dentry, &v9fs_cached_dentry_operations); + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + /* The fid would get clunked via a dput */ + fid = NULL; + } else { + /* + * Not in cached mode. No need to populate + * inode with stat. We need to get an inode + * so that we can set the acl with dentry + */ + inode = v9fs_get_inode(dir->i_sb, mode); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_set_d_op(dentry, &v9fs_dentry_operations); + d_instantiate(dentry, inode); + } + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); + + /* if we are opening a file, assign the open fid to the file */ + if (nd && nd->flags & LOOKUP_OPEN) { + filp = lookup_instantiate_filp(nd, dentry, generic_file_open); + if (IS_ERR(filp)) { + p9_client_clunk(ofid); + return PTR_ERR(filp); + } + filp->private_data = ofid; + } else + p9_client_clunk(ofid); + + return 0; + +error: + if (ofid) + p9_client_clunk(ofid); + if (fid) + p9_client_clunk(fid); + return err; +} + +/** + * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory + * @dir: inode that is being unlinked + * @dentry: dentry that is being unlinked + * @mode: mode for new directory + * + */ + +static int v9fs_vfs_mkdir_dotl(struct inode *dir, + struct dentry *dentry, int omode) +{ + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL, *dfid = NULL; + gid_t gid; + char *name; + mode_t mode; + struct inode *inode; + struct p9_qid qid; + struct dentry *dir_dentry; + struct posix_acl *dacl = NULL, *pacl = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); + err = 0; + v9ses = v9fs_inode2v9ses(dir); + + omode |= S_IFDIR; + if (dir->i_mode & S_ISGID) + omode |= S_ISGID; + + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + dfid = NULL; + goto error; + } + + gid = v9fs_get_fsgid_for_create(dir); + mode = omode; + /* Update mode based on ACL value */ + err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); + if (err) { + P9_DPRINTK(P9_DEBUG_VFS, + "Failed to get acl values in mkdir %d\n", err); + goto error; + } + name = (char *) dentry->d_name.name; + err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); + if (err < 0) + goto error; + + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_set_d_op(dentry, &v9fs_cached_dentry_operations); + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* + * Not in cached mode. No need to populate + * inode with stat. We need to get an inode + * so that we can set the acl with dentry + */ + inode = v9fs_get_inode(dir->i_sb, mode); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_set_d_op(dentry, &v9fs_dentry_operations); + d_instantiate(dentry, inode); + } + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); + +error: + if (fid) + p9_client_clunk(fid); + return err; +} + +static int +v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat) +{ + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_stat_dotl *st; + + P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); + err = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) + return simple_getattr(mnt, dentry, stat); + + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + /* Ask for all the fields in stat structure. Server will return + * whatever it supports + */ + + st = p9_client_getattr_dotl(fid, P9_STATS_ALL); + if (IS_ERR(st)) + return PTR_ERR(st); + + v9fs_stat2inode_dotl(st, dentry->d_inode); + generic_fillattr(dentry->d_inode, stat); + /* Change block size to what the server returned */ + stat->blksize = st->st_blksize; + + kfree(st); + return 0; +} + +/** + * v9fs_vfs_setattr_dotl - set file metadata + * @dentry: file whose metadata to set + * @iattr: metadata assignment structure + * + */ + +int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) +{ + int retval; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_iattr_dotl p9attr; + + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + + retval = inode_change_ok(dentry->d_inode, iattr); + if (retval) + return retval; + + p9attr.valid = iattr->ia_valid; + p9attr.mode = iattr->ia_mode; + p9attr.uid = iattr->ia_uid; + p9attr.gid = iattr->ia_gid; + p9attr.size = iattr->ia_size; + p9attr.atime_sec = iattr->ia_atime.tv_sec; + p9attr.atime_nsec = iattr->ia_atime.tv_nsec; + p9attr.mtime_sec = iattr->ia_mtime.tv_sec; + p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; + + retval = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + retval = p9_client_setattr(fid, &p9attr); + if (retval < 0) + return retval; + + if ((iattr->ia_valid & ATTR_SIZE) && + iattr->ia_size != i_size_read(dentry->d_inode)) { + retval = vmtruncate(dentry->d_inode, iattr->ia_size); + if (retval) + return retval; + } + + setattr_copy(dentry->d_inode, iattr); + mark_inode_dirty(dentry->d_inode); + if (iattr->ia_valid & ATTR_MODE) { + /* We also want to update ACL when we update mode bits */ + retval = v9fs_acl_chmod(dentry); + if (retval < 0) + return retval; + } + return 0; +} + +/** + * v9fs_stat2inode_dotl - populate an inode structure with stat info + * @stat: stat structure + * @inode: inode to populate + * @sb: superblock of filesystem + * + */ + +void +v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) +{ + + if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { + inode->i_atime.tv_sec = stat->st_atime_sec; + inode->i_atime.tv_nsec = stat->st_atime_nsec; + inode->i_mtime.tv_sec = stat->st_mtime_sec; + inode->i_mtime.tv_nsec = stat->st_mtime_nsec; + inode->i_ctime.tv_sec = stat->st_ctime_sec; + inode->i_ctime.tv_nsec = stat->st_ctime_nsec; + inode->i_uid = stat->st_uid; + inode->i_gid = stat->st_gid; + inode->i_nlink = stat->st_nlink; + inode->i_mode = stat->st_mode; + inode->i_rdev = new_decode_dev(stat->st_rdev); + + if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) + init_special_inode(inode, inode->i_mode, inode->i_rdev); + + i_size_write(inode, stat->st_size); + inode->i_blocks = stat->st_blocks; + } else { + if (stat->st_result_mask & P9_STATS_ATIME) { + inode->i_atime.tv_sec = stat->st_atime_sec; + inode->i_atime.tv_nsec = stat->st_atime_nsec; + } + if (stat->st_result_mask & P9_STATS_MTIME) { + inode->i_mtime.tv_sec = stat->st_mtime_sec; + inode->i_mtime.tv_nsec = stat->st_mtime_nsec; + } + if (stat->st_result_mask & P9_STATS_CTIME) { + inode->i_ctime.tv_sec = stat->st_ctime_sec; + inode->i_ctime.tv_nsec = stat->st_ctime_nsec; + } + if (stat->st_result_mask & P9_STATS_UID) + inode->i_uid = stat->st_uid; + if (stat->st_result_mask & P9_STATS_GID) + inode->i_gid = stat->st_gid; + if (stat->st_result_mask & P9_STATS_NLINK) + inode->i_nlink = stat->st_nlink; + if (stat->st_result_mask & P9_STATS_MODE) { + inode->i_mode = stat->st_mode; + if ((S_ISBLK(inode->i_mode)) || + (S_ISCHR(inode->i_mode))) + init_special_inode(inode, inode->i_mode, + inode->i_rdev); + } + if (stat->st_result_mask & P9_STATS_RDEV) + inode->i_rdev = new_decode_dev(stat->st_rdev); + if (stat->st_result_mask & P9_STATS_SIZE) + i_size_write(inode, stat->st_size); + if (stat->st_result_mask & P9_STATS_BLOCKS) + inode->i_blocks = stat->st_blocks; + } + if (stat->st_result_mask & P9_STATS_GEN) + inode->i_generation = stat->st_gen; + + /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION + * because the inode structure does not have fields for them. + */ +} + +static int +v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, + const char *symname) +{ + struct v9fs_session_info *v9ses; + struct p9_fid *dfid; + struct p9_fid *fid = NULL; + struct inode *inode; + struct p9_qid qid; + char *name; + int err; + gid_t gid; + + name = (char *) dentry->d_name.name; + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", + dir->i_ino, name, symname); + v9ses = v9fs_inode2v9ses(dir); + + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + return err; + } + + gid = v9fs_get_fsgid_for_create(dir); + + /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ + err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); + + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); + goto error; + } + + if (v9ses->cache) { + /* Now walk from the parent so we can get an unopened fid. */ + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + /* instantiate inode and assign the unopened fid to dentry */ + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_set_d_op(dentry, &v9fs_cached_dentry_operations); + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* Not in cached mode. No need to populate inode with stat */ + inode = v9fs_get_inode(dir->i_sb, S_IFLNK); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_set_d_op(dentry, &v9fs_dentry_operations); + d_instantiate(dentry, inode); + } + +error: + if (fid) + p9_client_clunk(fid); + + return err; +} + +/** + * v9fs_vfs_link_dotl - create a hardlink for dotl + * @old_dentry: dentry for file to link to + * @dir: inode destination for new link + * @dentry: dentry for link + * + */ + +static int +v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) +{ + int err; + struct p9_fid *dfid, *oldfid; + char *name; + struct v9fs_session_info *v9ses; + struct dentry *dir_dentry; + + P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", + dir->i_ino, old_dentry->d_name.name, + dentry->d_name.name); + + v9ses = v9fs_inode2v9ses(dir); + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) + return PTR_ERR(dfid); + + oldfid = v9fs_fid_lookup(old_dentry); + if (IS_ERR(oldfid)) + return PTR_ERR(oldfid); + + name = (char *) dentry->d_name.name; + + err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); + + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); + return err; + } + + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + /* Get the latest stat info from server. */ + struct p9_fid *fid; + struct p9_stat_dotl *st; + + fid = v9fs_fid_lookup(old_dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) + return PTR_ERR(st); + + v9fs_stat2inode_dotl(st, old_dentry->d_inode); + + kfree(st); + } else { + /* Caching disabled. No need to get upto date stat info. + * This dentry will be released immediately. So, just hold the + * inode + */ + ihold(old_dentry->d_inode); + } + + d_set_d_op(dentry, old_dentry->d_op); + d_instantiate(dentry, old_dentry->d_inode); + + return err; +} + +/** + * v9fs_vfs_mknod_dotl - create a special file + * @dir: inode destination for new link + * @dentry: dentry for file + * @mode: mode for creation + * @rdev: device associated with special file + * + */ +static int +v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, + dev_t rdev) +{ + int err; + char *name; + mode_t mode; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL, *dfid = NULL; + struct inode *inode; + gid_t gid; + struct p9_qid qid; + struct dentry *dir_dentry; + struct posix_acl *dacl = NULL, *pacl = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, + " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, + dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); + + if (!new_valid_dev(rdev)) + return -EINVAL; + + v9ses = v9fs_inode2v9ses(dir); + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + dfid = NULL; + goto error; + } + + gid = v9fs_get_fsgid_for_create(dir); + mode = omode; + /* Update mode based on ACL value */ + err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); + if (err) { + P9_DPRINTK(P9_DEBUG_VFS, + "Failed to get acl values in mknod %d\n", err); + goto error; + } + name = (char *) dentry->d_name.name; + + err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); + if (err < 0) + goto error; + + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_set_d_op(dentry, &v9fs_cached_dentry_operations); + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* + * Not in cached mode. No need to populate inode with stat. + * socket syscall returns a fd, so we need instantiate + */ + inode = v9fs_get_inode(dir->i_sb, mode); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_set_d_op(dentry, &v9fs_dentry_operations); + d_instantiate(dentry, inode); + } + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); +error: + if (fid) + p9_client_clunk(fid); + return err; +} + +static int +v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen) +{ + int retval; + struct p9_fid *fid; + char *target = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); + retval = -EPERM; + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + retval = p9_client_readlink(fid, &target); + if (retval < 0) + return retval; + + strncpy(buffer, target, buflen); + P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer); + + retval = strnlen(buffer, buflen); + return retval; +} + +/** + * v9fs_vfs_follow_link_dotl - follow a symlink path + * @dentry: dentry for symlink + * @nd: nameidata + * + */ + +static void * +v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) +{ + int len = 0; + char *link = __getname(); + + P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); + + if (!link) + link = ERR_PTR(-ENOMEM); + else { + len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX); + if (len < 0) { + __putname(link); + link = ERR_PTR(len); + } else + link[min(len, PATH_MAX-1)] = 0; + } + nd_set_link(nd, link); + + return NULL; +} + +const struct inode_operations v9fs_dir_inode_operations_dotl = { + .create = v9fs_vfs_create_dotl, + .lookup = v9fs_vfs_lookup, + .link = v9fs_vfs_link_dotl, + .symlink = v9fs_vfs_symlink_dotl, + .unlink = v9fs_vfs_unlink, + .mkdir = v9fs_vfs_mkdir_dotl, + .rmdir = v9fs_vfs_rmdir, + .mknod = v9fs_vfs_mknod_dotl, + .rename = v9fs_vfs_rename, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, + .check_acl = v9fs_check_acl, +}; + +const struct inode_operations v9fs_file_inode_operations_dotl = { + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, + .check_acl = v9fs_check_acl, +}; + +const struct inode_operations v9fs_symlink_inode_operations_dotl = { + .readlink = v9fs_vfs_readlink_dotl, + .follow_link = v9fs_vfs_follow_link_dotl, + .put_link = v9fs_vfs_put_link, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, +}; |
