2 * linux/fs/9p/vfs_inode.c
4 * This file contains vfs inode ops for the 9P2000 protocol.
6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
26 #include <linux/module.h>
27 #include <linux/errno.h>
29 #include <linux/file.h>
30 #include <linux/pagemap.h>
31 #include <linux/stat.h>
32 #include <linux/string.h>
33 #include <linux/inet.h>
34 #include <linux/namei.h>
35 #include <linux/idr.h>
36 #include <linux/sched.h>
37 #include <linux/slab.h>
38 #include <net/9p/9p.h>
39 #include <net/9p/client.h>
46 static const struct inode_operations v9fs_dir_inode_operations;
47 static const struct inode_operations v9fs_dir_inode_operations_ext;
48 static const struct inode_operations v9fs_file_inode_operations;
49 static const struct inode_operations v9fs_symlink_inode_operations;
52 * unixmode2p9mode - convert unix mode bits to plan 9
53 * @v9ses: v9fs session information
54 * @mode: mode to convert
58 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
64 if (v9fs_proto_dotu(v9ses)) {
67 if (v9ses->nodev == 0) {
71 res |= P9_DMNAMEDPIPE;
78 if ((mode & S_ISUID) == S_ISUID)
80 if ((mode & S_ISGID) == S_ISGID)
82 if ((mode & S_ISVTX) == S_ISVTX)
84 if ((mode & P9_DMLINK))
92 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
93 * @v9ses: v9fs session information
94 * @mode: mode to convert
98 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
104 if ((mode & P9_DMDIR) == P9_DMDIR)
106 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
108 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
109 && (v9ses->nodev == 0))
111 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
112 && (v9ses->nodev == 0))
114 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
115 && (v9ses->nodev == 0))
120 if (v9fs_proto_dotu(v9ses)) {
121 if ((mode & P9_DMSETUID) == P9_DMSETUID)
124 if ((mode & P9_DMSETGID) == P9_DMSETGID)
127 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
135 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
136 * @uflags: flags to convert
137 * @extended: if .u extensions are active
140 int v9fs_uflags2omode(int uflags, int extended)
160 if (uflags & O_TRUNC)
167 if (uflags & O_APPEND)
175 * v9fs_blank_wstat - helper function to setup a 9P stat structure
176 * @wstat: structure to initialize
181 v9fs_blank_wstat(struct p9_wstat *wstat)
185 wstat->qid.type = ~0;
186 wstat->qid.version = ~0;
187 *((long long *)&wstat->qid.path) = ~0;
199 wstat->extension = NULL;
202 #ifdef CONFIG_9P_FSCACHE
204 * v9fs_alloc_inode - helper function to allocate an inode
205 * This callback is executed before setting up the inode so that we
206 * can associate a vcookie with each inode.
210 struct inode *v9fs_alloc_inode(struct super_block *sb)
212 struct v9fs_cookie *vcookie;
213 vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache,
218 vcookie->fscache = NULL;
220 spin_lock_init(&vcookie->lock);
221 return &vcookie->inode;
225 * v9fs_destroy_inode - destroy an inode
229 void v9fs_destroy_inode(struct inode *inode)
231 kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
236 * v9fs_get_inode - helper function to setup an inode
238 * @mode: mode to setup inode with
242 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
246 struct v9fs_session_info *v9ses = sb->s_fs_info;
248 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
250 inode = new_inode(sb);
252 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
253 return ERR_PTR(-ENOMEM);
256 inode->i_mode = mode;
257 inode->i_uid = current_fsuid();
258 inode->i_gid = current_fsgid();
261 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
262 inode->i_mapping->a_ops = &v9fs_addr_operations;
264 switch (mode & S_IFMT) {
269 if (!v9fs_proto_dotu(v9ses)) {
270 P9_DPRINTK(P9_DEBUG_ERROR,
271 "special files without extended mode\n");
275 init_special_inode(inode, inode->i_mode, inode->i_rdev);
278 inode->i_op = &v9fs_file_inode_operations;
279 inode->i_fop = &v9fs_file_operations;
282 if (!v9fs_proto_dotu(v9ses)) {
283 P9_DPRINTK(P9_DEBUG_ERROR,
284 "extended modes used w/o 9P2000.u\n");
288 inode->i_op = &v9fs_symlink_inode_operations;
292 if (v9fs_proto_dotu(v9ses))
293 inode->i_op = &v9fs_dir_inode_operations_ext;
295 inode->i_op = &v9fs_dir_inode_operations;
296 inode->i_fop = &v9fs_dir_operations;
299 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
300 mode, mode & S_IFMT);
313 static struct v9fs_fid*
314 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
318 struct v9fs_fid *ret;
319 struct v9fs_fcall *fcall;
321 nfid = v9fs_get_idpool(&v9ses->fidpool);
323 eprintk(KERN_WARNING, "no free fids available\n");
324 return ERR_PTR(-ENOSPC);
327 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
331 if (fcall && fcall->id == RWALK)
334 PRINT_FCALL_ERROR("walk error", fcall);
335 v9fs_put_idpool(nfid, &v9ses->fidpool);
341 ret = v9fs_fid_create(v9ses, nfid);
347 err = v9fs_fid_insert(ret, dentry);
349 v9fs_fid_destroy(ret);
356 v9fs_t_clunk(v9ses, nfid);
366 * v9fs_clear_inode - release an inode
367 * @inode: inode to release
370 void v9fs_clear_inode(struct inode *inode)
372 filemap_fdatawrite(inode->i_mapping);
374 #ifdef CONFIG_9P_FSCACHE
375 v9fs_cache_inode_put_cookie(inode);
380 * v9fs_inode_from_fid - populate an inode by issuing a attribute request
381 * @v9ses: session information
382 * @fid: fid to issue attribute request for
383 * @sb: superblock on which to create inode
387 static struct inode *
388 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
389 struct super_block *sb)
396 st = p9_client_stat(fid);
400 umode = p9mode2unixmode(v9ses, st->mode);
401 ret = v9fs_get_inode(sb, umode);
407 v9fs_stat2inode(st, ret, sb);
408 ret->i_ino = v9fs_qid2ino(&st->qid);
410 #ifdef CONFIG_9P_FSCACHE
411 v9fs_vcookie_set_qid(ret, &st->qid);
412 v9fs_cache_inode_get_cookie(ret);
426 * v9fs_remove - helper function to remove files and directories
427 * @dir: directory inode that is being deleted
428 * @file: dentry that is being deleted
429 * @rmdir: removing a directory
433 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
435 struct inode *file_inode;
436 struct v9fs_session_info *v9ses;
437 struct p9_fid *v9fid;
439 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
442 file_inode = file->d_inode;
443 v9ses = v9fs_inode2v9ses(file_inode);
444 v9fid = v9fs_fid_clone(file);
446 return PTR_ERR(v9fid);
448 return p9_client_remove(v9fid);
452 v9fs_open_created(struct inode *inode, struct file *file)
459 * v9fs_create - Create a file
460 * @v9ses: session information
461 * @dir: directory that dentry is being created in
462 * @dentry: dentry that is being created
463 * @extension: 9p2000.u extension string to support devices, etc.
464 * @perm: create permissions
468 static struct p9_fid *
469 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
470 struct dentry *dentry, char *extension, u32 perm, u8 mode)
474 struct p9_fid *dfid, *ofid, *fid;
477 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
482 name = (char *) dentry->d_name.name;
483 dfid = v9fs_fid_clone(dentry->d_parent);
486 P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
491 /* clone a fid to use for creation */
492 ofid = p9_client_walk(dfid, 0, NULL, 1);
495 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
500 err = p9_client_fcreate(ofid, name, perm, mode, extension);
502 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
506 /* now walk from the parent so we can get unopened fid */
507 fid = p9_client_walk(dfid, 1, &name, 0);
510 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
516 /* instantiate inode and assign the unopened fid to the dentry */
517 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
519 err = PTR_ERR(inode);
520 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
525 dentry->d_op = &v9fs_cached_dentry_operations;
527 dentry->d_op = &v9fs_dentry_operations;
529 d_instantiate(dentry, inode);
530 err = v9fs_fid_add(dentry, fid);
538 p9_client_clunk(dfid);
541 p9_client_clunk(ofid);
544 p9_client_clunk(fid);
550 * v9fs_vfs_create - VFS hook to create files
551 * @dir: directory inode that is being created
552 * @dentry: dentry that is being deleted
553 * @mode: create permissions
554 * @nd: path information
559 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
560 struct nameidata *nd)
565 struct v9fs_session_info *v9ses;
571 v9ses = v9fs_inode2v9ses(dir);
572 perm = unixmode2p9mode(v9ses, mode);
573 if (nd && nd->flags & LOOKUP_OPEN)
574 flags = nd->intent.open.flags - 1;
578 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
579 v9fs_uflags2omode(flags,
580 v9fs_proto_dotu(v9ses)));
587 /* if we are opening a file, assign the open fid to the file */
588 if (nd && nd->flags & LOOKUP_OPEN) {
589 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
595 filp->private_data = fid;
597 p9_client_clunk(fid);
603 p9_client_clunk(fid);
609 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
610 * @dir: inode that is being unlinked
611 * @dentry: dentry that is being unlinked
612 * @mode: mode for new directory
616 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
620 struct v9fs_session_info *v9ses;
623 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
625 v9ses = v9fs_inode2v9ses(dir);
626 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
627 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
634 p9_client_clunk(fid);
640 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
641 * @dir: inode that is being walked from
642 * @dentry: dentry that is being walked to?
643 * @nameidata: path data
647 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
648 struct nameidata *nameidata)
650 struct super_block *sb;
651 struct v9fs_session_info *v9ses;
652 struct p9_fid *dfid, *fid;
657 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
658 dir, dentry->d_name.name, dentry, nameidata);
661 v9ses = v9fs_inode2v9ses(dir);
662 dfid = v9fs_fid_lookup(dentry->d_parent);
664 return ERR_CAST(dfid);
666 name = (char *) dentry->d_name.name;
667 fid = p9_client_walk(dfid, 1, &name, 1);
669 result = PTR_ERR(fid);
670 if (result == -ENOENT) {
675 return ERR_PTR(result);
678 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
680 result = PTR_ERR(inode);
685 result = v9fs_fid_add(dentry, fid);
689 if ((fid->qid.version) && (v9ses->cache))
690 dentry->d_op = &v9fs_cached_dentry_operations;
692 dentry->d_op = &v9fs_dentry_operations;
694 d_add(dentry, inode);
698 p9_client_clunk(fid);
700 return ERR_PTR(result);
704 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
705 * @i: inode that is being unlinked
706 * @d: dentry that is being unlinked
710 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
712 return v9fs_remove(i, d, 0);
716 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
717 * @i: inode that is being unlinked
718 * @d: dentry that is being unlinked
722 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
724 return v9fs_remove(i, d, 1);
728 * v9fs_vfs_rename - VFS hook to rename an inode
729 * @old_dir: old dir inode
730 * @old_dentry: old dentry
731 * @new_dir: new dir inode
732 * @new_dentry: new dentry
737 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
738 struct inode *new_dir, struct dentry *new_dentry)
740 struct inode *old_inode;
741 struct v9fs_session_info *v9ses;
742 struct p9_fid *oldfid;
743 struct p9_fid *olddirfid;
744 struct p9_fid *newdirfid;
745 struct p9_wstat wstat;
748 P9_DPRINTK(P9_DEBUG_VFS, "\n");
750 old_inode = old_dentry->d_inode;
751 v9ses = v9fs_inode2v9ses(old_inode);
752 oldfid = v9fs_fid_lookup(old_dentry);
754 return PTR_ERR(oldfid);
756 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
757 if (IS_ERR(olddirfid)) {
758 retval = PTR_ERR(olddirfid);
762 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
763 if (IS_ERR(newdirfid)) {
764 retval = PTR_ERR(newdirfid);
768 /* 9P can only handle file rename in the same directory */
769 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
770 P9_DPRINTK(P9_DEBUG_ERROR,
771 "old dir and new dir are different\n");
776 v9fs_blank_wstat(&wstat);
777 wstat.muid = v9ses->uname;
778 wstat.name = (char *) new_dentry->d_name.name;
779 retval = p9_client_wstat(oldfid, &wstat);
782 p9_client_clunk(newdirfid);
785 p9_client_clunk(olddirfid);
792 * v9fs_vfs_getattr - retrieve file metadata
793 * @mnt: mount information
794 * @dentry: file to get attributes on
795 * @stat: metadata structure to populate
800 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
804 struct v9fs_session_info *v9ses;
808 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
810 v9ses = v9fs_inode2v9ses(dentry->d_inode);
811 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
812 return simple_getattr(mnt, dentry, stat);
814 fid = v9fs_fid_lookup(dentry);
818 st = p9_client_stat(fid);
822 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
823 generic_fillattr(dentry->d_inode, stat);
830 * v9fs_vfs_setattr - set file metadata
831 * @dentry: file whose metadata to set
832 * @iattr: metadata assignment structure
836 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
839 struct v9fs_session_info *v9ses;
841 struct p9_wstat wstat;
843 P9_DPRINTK(P9_DEBUG_VFS, "\n");
845 v9ses = v9fs_inode2v9ses(dentry->d_inode);
846 fid = v9fs_fid_lookup(dentry);
850 v9fs_blank_wstat(&wstat);
851 if (iattr->ia_valid & ATTR_MODE)
852 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
854 if (iattr->ia_valid & ATTR_MTIME)
855 wstat.mtime = iattr->ia_mtime.tv_sec;
857 if (iattr->ia_valid & ATTR_ATIME)
858 wstat.atime = iattr->ia_atime.tv_sec;
860 if (iattr->ia_valid & ATTR_SIZE)
861 wstat.length = iattr->ia_size;
863 if (v9fs_proto_dotu(v9ses)) {
864 if (iattr->ia_valid & ATTR_UID)
865 wstat.n_uid = iattr->ia_uid;
867 if (iattr->ia_valid & ATTR_GID)
868 wstat.n_gid = iattr->ia_gid;
871 retval = p9_client_wstat(fid, &wstat);
873 retval = inode_setattr(dentry->d_inode, iattr);
879 * v9fs_stat2inode - populate an inode structure with mistat info
880 * @stat: Plan 9 metadata (mistat) structure
881 * @inode: inode to populate
882 * @sb: superblock of filesystem
887 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
888 struct super_block *sb)
892 unsigned int i_nlink;
893 struct v9fs_session_info *v9ses = sb->s_fs_info;
897 inode->i_atime.tv_sec = stat->atime;
898 inode->i_mtime.tv_sec = stat->mtime;
899 inode->i_ctime.tv_sec = stat->mtime;
901 inode->i_uid = v9ses->dfltuid;
902 inode->i_gid = v9ses->dfltgid;
904 if (v9fs_proto_dotu(v9ses)) {
905 inode->i_uid = stat->n_uid;
906 inode->i_gid = stat->n_gid;
908 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
909 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
911 * Hadlink support got added later to
912 * to the .u extension. So there can be
913 * server out there that doesn't support
914 * this even with .u extension. So check
915 * for non NULL stat->extension
917 strncpy(ext, stat->extension, sizeof(ext));
918 /* HARDLINKCOUNT %u */
919 sscanf(ext, "%13s %u", tag_name, &i_nlink);
920 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
921 inode->i_nlink = i_nlink;
924 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
925 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
930 strncpy(ext, stat->extension, sizeof(ext));
931 sscanf(ext, "%c %u %u", &type, &major, &minor);
934 inode->i_mode &= ~S_IFBLK;
935 inode->i_mode |= S_IFCHR;
940 P9_DPRINTK(P9_DEBUG_ERROR,
941 "Unknown special type %c %s\n", type,
944 inode->i_rdev = MKDEV(major, minor);
945 init_special_inode(inode, inode->i_mode, inode->i_rdev);
949 i_size_write(inode, stat->length);
951 /* not real number of blocks, but 512 byte ones ... */
952 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
956 * v9fs_qid2ino - convert qid into inode number
959 * BUG: potential for inode number collisions?
962 ino_t v9fs_qid2ino(struct p9_qid *qid)
964 u64 path = qid->path + 2;
967 if (sizeof(ino_t) == sizeof(path))
968 memcpy(&i, &path, sizeof(ino_t));
970 i = (ino_t) (path ^ (path >> 32));
976 * v9fs_readlink - read a symlink's location (internal version)
977 * @dentry: dentry for symlink
978 * @buffer: buffer to load symlink location into
979 * @buflen: length of buffer
983 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
987 struct v9fs_session_info *v9ses;
991 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
993 v9ses = v9fs_inode2v9ses(dentry->d_inode);
994 fid = v9fs_fid_lookup(dentry);
998 if (!v9fs_proto_dotu(v9ses))
1001 st = p9_client_stat(fid);
1005 if (!(st->mode & P9_DMSYMLINK)) {
1010 /* copy extension buffer into buffer */
1011 strncpy(buffer, st->extension, buflen);
1013 P9_DPRINTK(P9_DEBUG_VFS,
1014 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
1016 retval = strnlen(buffer, buflen);
1023 * v9fs_vfs_follow_link - follow a symlink path
1024 * @dentry: dentry for symlink
1029 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1032 char *link = __getname();
1034 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1037 link = ERR_PTR(-ENOMEM);
1039 len = v9fs_readlink(dentry, link, PATH_MAX);
1043 link = ERR_PTR(len);
1045 link[min(len, PATH_MAX-1)] = 0;
1047 nd_set_link(nd, link);
1053 * v9fs_vfs_put_link - release a symlink path
1054 * @dentry: dentry for symlink
1061 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1063 char *s = nd_get_link(nd);
1065 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1066 IS_ERR(s) ? "<error>" : s);
1072 * v9fs_vfs_mkspecial - create a special file
1073 * @dir: inode to create special file in
1074 * @dentry: dentry to create
1075 * @mode: mode to create special file
1076 * @extension: 9p2000.u format extension string representing special file
1080 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1081 int mode, const char *extension)
1084 struct v9fs_session_info *v9ses;
1087 v9ses = v9fs_inode2v9ses(dir);
1088 if (!v9fs_proto_dotu(v9ses)) {
1089 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1093 perm = unixmode2p9mode(v9ses, mode);
1094 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1097 return PTR_ERR(fid);
1099 p9_client_clunk(fid);
1104 * v9fs_vfs_symlink - helper function to create symlinks
1105 * @dir: directory inode containing symlink
1106 * @dentry: dentry for symlink
1107 * @symname: symlink data
1109 * See Also: 9P2000.u RFC for more information
1114 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1116 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1117 dentry->d_name.name, symname);
1119 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1123 * v9fs_vfs_link - create a hardlink
1124 * @old_dentry: dentry for file to link to
1125 * @dir: inode destination for new link
1126 * @dentry: dentry for link
1131 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1132 struct dentry *dentry)
1135 struct p9_fid *oldfid;
1138 P9_DPRINTK(P9_DEBUG_VFS,
1139 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1140 old_dentry->d_name.name);
1142 oldfid = v9fs_fid_clone(old_dentry);
1144 return PTR_ERR(oldfid);
1147 if (unlikely(!name)) {
1152 sprintf(name, "%d\n", oldfid->fid);
1153 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1157 p9_client_clunk(oldfid);
1162 * v9fs_vfs_mknod - create a special file
1163 * @dir: inode destination for new link
1164 * @dentry: dentry for file
1165 * @mode: mode for creation
1166 * @rdev: device associated with special file
1171 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1176 P9_DPRINTK(P9_DEBUG_VFS,
1177 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1178 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1180 if (!new_valid_dev(rdev))
1186 /* build extension */
1188 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1189 else if (S_ISCHR(mode))
1190 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1191 else if (S_ISFIFO(mode))
1198 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1204 static const struct inode_operations v9fs_dir_inode_operations_ext = {
1205 .create = v9fs_vfs_create,
1206 .lookup = v9fs_vfs_lookup,
1207 .symlink = v9fs_vfs_symlink,
1208 .link = v9fs_vfs_link,
1209 .unlink = v9fs_vfs_unlink,
1210 .mkdir = v9fs_vfs_mkdir,
1211 .rmdir = v9fs_vfs_rmdir,
1212 .mknod = v9fs_vfs_mknod,
1213 .rename = v9fs_vfs_rename,
1214 .getattr = v9fs_vfs_getattr,
1215 .setattr = v9fs_vfs_setattr,
1218 static const struct inode_operations v9fs_dir_inode_operations = {
1219 .create = v9fs_vfs_create,
1220 .lookup = v9fs_vfs_lookup,
1221 .unlink = v9fs_vfs_unlink,
1222 .mkdir = v9fs_vfs_mkdir,
1223 .rmdir = v9fs_vfs_rmdir,
1224 .mknod = v9fs_vfs_mknod,
1225 .rename = v9fs_vfs_rename,
1226 .getattr = v9fs_vfs_getattr,
1227 .setattr = v9fs_vfs_setattr,
1230 static const struct inode_operations v9fs_file_inode_operations = {
1231 .getattr = v9fs_vfs_getattr,
1232 .setattr = v9fs_vfs_setattr,
1235 static const struct inode_operations v9fs_symlink_inode_operations = {
1236 .readlink = generic_readlink,
1237 .follow_link = v9fs_vfs_follow_link,
1238 .put_link = v9fs_vfs_put_link,
1239 .getattr = v9fs_vfs_getattr,
1240 .setattr = v9fs_vfs_setattr,