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 <net/9p/9p.h>
38 #include <net/9p/client.h>
45 static const struct inode_operations v9fs_dir_inode_operations;
46 static const struct inode_operations v9fs_dir_inode_operations_ext;
47 static const struct inode_operations v9fs_file_inode_operations;
48 static const struct inode_operations v9fs_symlink_inode_operations;
51 * unixmode2p9mode - convert unix mode bits to plan 9
52 * @v9ses: v9fs session information
53 * @mode: mode to convert
57 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
63 if (v9fs_proto_dotu(v9ses)) {
66 if (v9ses->nodev == 0) {
70 res |= P9_DMNAMEDPIPE;
77 if ((mode & S_ISUID) == S_ISUID)
79 if ((mode & S_ISGID) == S_ISGID)
81 if ((mode & S_ISVTX) == S_ISVTX)
83 if ((mode & P9_DMLINK))
91 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
92 * @v9ses: v9fs session information
93 * @mode: mode to convert
97 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
103 if ((mode & P9_DMDIR) == P9_DMDIR)
105 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
107 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
108 && (v9ses->nodev == 0))
110 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
111 && (v9ses->nodev == 0))
113 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
114 && (v9ses->nodev == 0))
119 if (v9fs_proto_dotu(v9ses)) {
120 if ((mode & P9_DMSETUID) == P9_DMSETUID)
123 if ((mode & P9_DMSETGID) == P9_DMSETGID)
126 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
134 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
135 * @uflags: flags to convert
136 * @extended: if .u extensions are active
139 int v9fs_uflags2omode(int uflags, int extended)
159 if (uflags & O_TRUNC)
166 if (uflags & O_APPEND)
174 * v9fs_blank_wstat - helper function to setup a 9P stat structure
175 * @wstat: structure to initialize
180 v9fs_blank_wstat(struct p9_wstat *wstat)
184 wstat->qid.type = ~0;
185 wstat->qid.version = ~0;
186 *((long long *)&wstat->qid.path) = ~0;
198 wstat->extension = NULL;
201 #ifdef CONFIG_9P_FSCACHE
203 * v9fs_alloc_inode - helper function to allocate an inode
204 * This callback is executed before setting up the inode so that we
205 * can associate a vcookie with each inode.
209 struct inode *v9fs_alloc_inode(struct super_block *sb)
211 struct v9fs_cookie *vcookie;
212 vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache,
217 vcookie->fscache = NULL;
219 spin_lock_init(&vcookie->lock);
220 return &vcookie->inode;
224 * v9fs_destroy_inode - destroy an inode
228 void v9fs_destroy_inode(struct inode *inode)
230 kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
235 * v9fs_get_inode - helper function to setup an inode
237 * @mode: mode to setup inode with
241 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
245 struct v9fs_session_info *v9ses = sb->s_fs_info;
247 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
249 inode = new_inode(sb);
251 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
252 return ERR_PTR(-ENOMEM);
255 inode->i_mode = mode;
256 inode->i_uid = current_fsuid();
257 inode->i_gid = current_fsgid();
260 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
261 inode->i_mapping->a_ops = &v9fs_addr_operations;
263 switch (mode & S_IFMT) {
268 if (!v9fs_proto_dotu(v9ses)) {
269 P9_DPRINTK(P9_DEBUG_ERROR,
270 "special files without extended mode\n");
274 init_special_inode(inode, inode->i_mode, inode->i_rdev);
277 inode->i_op = &v9fs_file_inode_operations;
278 inode->i_fop = &v9fs_file_operations;
281 if (!v9fs_proto_dotu(v9ses)) {
282 P9_DPRINTK(P9_DEBUG_ERROR,
283 "extended modes used w/o 9P2000.u\n");
287 inode->i_op = &v9fs_symlink_inode_operations;
291 if (v9fs_proto_dotu(v9ses))
292 inode->i_op = &v9fs_dir_inode_operations_ext;
294 inode->i_op = &v9fs_dir_inode_operations;
295 inode->i_fop = &v9fs_dir_operations;
298 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
299 mode, mode & S_IFMT);
312 static struct v9fs_fid*
313 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
317 struct v9fs_fid *ret;
318 struct v9fs_fcall *fcall;
320 nfid = v9fs_get_idpool(&v9ses->fidpool);
322 eprintk(KERN_WARNING, "no free fids available\n");
323 return ERR_PTR(-ENOSPC);
326 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
330 if (fcall && fcall->id == RWALK)
333 PRINT_FCALL_ERROR("walk error", fcall);
334 v9fs_put_idpool(nfid, &v9ses->fidpool);
340 ret = v9fs_fid_create(v9ses, nfid);
346 err = v9fs_fid_insert(ret, dentry);
348 v9fs_fid_destroy(ret);
355 v9fs_t_clunk(v9ses, nfid);
365 * v9fs_clear_inode - release an inode
366 * @inode: inode to release
369 void v9fs_clear_inode(struct inode *inode)
371 filemap_fdatawrite(inode->i_mapping);
373 #ifdef CONFIG_9P_FSCACHE
374 v9fs_cache_inode_put_cookie(inode);
379 * v9fs_inode_from_fid - populate an inode by issuing a attribute request
380 * @v9ses: session information
381 * @fid: fid to issue attribute request for
382 * @sb: superblock on which to create inode
386 static struct inode *
387 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
388 struct super_block *sb)
395 st = p9_client_stat(fid);
399 umode = p9mode2unixmode(v9ses, st->mode);
400 ret = v9fs_get_inode(sb, umode);
406 v9fs_stat2inode(st, ret, sb);
407 ret->i_ino = v9fs_qid2ino(&st->qid);
409 #ifdef CONFIG_9P_FSCACHE
410 v9fs_vcookie_set_qid(ret, &st->qid);
411 v9fs_cache_inode_get_cookie(ret);
425 * v9fs_remove - helper function to remove files and directories
426 * @dir: directory inode that is being deleted
427 * @file: dentry that is being deleted
428 * @rmdir: removing a directory
432 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 retval = p9_client_remove(v9fid);
450 drop_nlink(file_inode);
455 v9fs_open_created(struct inode *inode, struct file *file)
462 * v9fs_create - Create a file
463 * @v9ses: session information
464 * @dir: directory that dentry is being created in
465 * @dentry: dentry that is being created
466 * @extension: 9p2000.u extension string to support devices, etc.
467 * @perm: create permissions
471 static struct p9_fid *
472 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
473 struct dentry *dentry, char *extension, u32 perm, u8 mode)
477 struct p9_fid *dfid, *ofid, *fid;
480 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
485 name = (char *) dentry->d_name.name;
486 dfid = v9fs_fid_clone(dentry->d_parent);
489 P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
494 /* clone a fid to use for creation */
495 ofid = p9_client_walk(dfid, 0, NULL, 1);
498 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
503 err = p9_client_fcreate(ofid, name, perm, mode, extension);
505 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
509 /* now walk from the parent so we can get unopened fid */
510 fid = p9_client_walk(dfid, 1, &name, 0);
513 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
519 /* instantiate inode and assign the unopened fid to the dentry */
520 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
522 err = PTR_ERR(inode);
523 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
528 dentry->d_op = &v9fs_cached_dentry_operations;
530 dentry->d_op = &v9fs_dentry_operations;
532 d_instantiate(dentry, inode);
533 err = v9fs_fid_add(dentry, fid);
541 p9_client_clunk(dfid);
544 p9_client_clunk(ofid);
547 p9_client_clunk(fid);
553 * v9fs_vfs_create - VFS hook to create files
554 * @dir: directory inode that is being created
555 * @dentry: dentry that is being deleted
556 * @mode: create permissions
557 * @nd: path information
562 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
563 struct nameidata *nd)
568 struct v9fs_session_info *v9ses;
574 v9ses = v9fs_inode2v9ses(dir);
575 perm = unixmode2p9mode(v9ses, mode);
576 if (nd && nd->flags & LOOKUP_OPEN)
577 flags = nd->intent.open.flags - 1;
581 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
582 v9fs_uflags2omode(flags,
583 v9fs_proto_dotu(v9ses)));
590 /* if we are opening a file, assign the open fid to the file */
591 if (nd && nd->flags & LOOKUP_OPEN) {
592 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
598 filp->private_data = fid;
600 p9_client_clunk(fid);
606 p9_client_clunk(fid);
612 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
613 * @dir: inode that is being unlinked
614 * @dentry: dentry that is being unlinked
615 * @mode: mode for new directory
619 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
623 struct v9fs_session_info *v9ses;
626 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
628 v9ses = v9fs_inode2v9ses(dir);
629 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
630 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
637 p9_client_clunk(fid);
643 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
644 * @dir: inode that is being walked from
645 * @dentry: dentry that is being walked to?
646 * @nameidata: path data
650 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
651 struct nameidata *nameidata)
653 struct super_block *sb;
654 struct v9fs_session_info *v9ses;
655 struct p9_fid *dfid, *fid;
660 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
661 dir, dentry->d_name.name, dentry, nameidata);
663 if (dentry->d_name.len > NAME_MAX)
664 return ERR_PTR(-ENAMETOOLONG);
667 v9ses = v9fs_inode2v9ses(dir);
668 dfid = v9fs_fid_lookup(dentry->d_parent);
670 return ERR_CAST(dfid);
672 name = (char *) dentry->d_name.name;
673 fid = p9_client_walk(dfid, 1, &name, 1);
675 result = PTR_ERR(fid);
676 if (result == -ENOENT) {
681 return ERR_PTR(result);
684 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
686 result = PTR_ERR(inode);
691 result = v9fs_fid_add(dentry, fid);
695 if ((fid->qid.version) && (v9ses->cache))
696 dentry->d_op = &v9fs_cached_dentry_operations;
698 dentry->d_op = &v9fs_dentry_operations;
700 d_add(dentry, inode);
704 p9_client_clunk(fid);
706 return ERR_PTR(result);
710 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
711 * @i: inode that is being unlinked
712 * @d: dentry that is being unlinked
716 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
718 return v9fs_remove(i, d, 0);
722 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
723 * @i: inode that is being unlinked
724 * @d: dentry that is being unlinked
728 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
730 return v9fs_remove(i, d, 1);
734 * v9fs_vfs_rename - VFS hook to rename an inode
735 * @old_dir: old dir inode
736 * @old_dentry: old dentry
737 * @new_dir: new dir inode
738 * @new_dentry: new dentry
743 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
744 struct inode *new_dir, struct dentry *new_dentry)
746 struct inode *old_inode;
747 struct v9fs_session_info *v9ses;
748 struct p9_fid *oldfid;
749 struct p9_fid *olddirfid;
750 struct p9_fid *newdirfid;
751 struct p9_wstat wstat;
754 P9_DPRINTK(P9_DEBUG_VFS, "\n");
756 old_inode = old_dentry->d_inode;
757 v9ses = v9fs_inode2v9ses(old_inode);
758 oldfid = v9fs_fid_lookup(old_dentry);
760 return PTR_ERR(oldfid);
762 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
763 if (IS_ERR(olddirfid)) {
764 retval = PTR_ERR(olddirfid);
768 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
769 if (IS_ERR(newdirfid)) {
770 retval = PTR_ERR(newdirfid);
774 /* 9P can only handle file rename in the same directory */
775 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
776 P9_DPRINTK(P9_DEBUG_ERROR,
777 "old dir and new dir are different\n");
782 v9fs_blank_wstat(&wstat);
783 wstat.muid = v9ses->uname;
784 wstat.name = (char *) new_dentry->d_name.name;
785 retval = p9_client_wstat(oldfid, &wstat);
788 p9_client_clunk(newdirfid);
791 p9_client_clunk(olddirfid);
798 * v9fs_vfs_getattr - retrieve file metadata
799 * @mnt: mount information
800 * @dentry: file to get attributes on
801 * @stat: metadata structure to populate
806 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
810 struct v9fs_session_info *v9ses;
814 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
816 v9ses = v9fs_inode2v9ses(dentry->d_inode);
817 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
818 return simple_getattr(mnt, dentry, stat);
820 fid = v9fs_fid_lookup(dentry);
824 st = p9_client_stat(fid);
828 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
829 generic_fillattr(dentry->d_inode, stat);
836 * v9fs_vfs_setattr - set file metadata
837 * @dentry: file whose metadata to set
838 * @iattr: metadata assignment structure
842 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
845 struct v9fs_session_info *v9ses;
847 struct p9_wstat wstat;
849 P9_DPRINTK(P9_DEBUG_VFS, "\n");
851 v9ses = v9fs_inode2v9ses(dentry->d_inode);
852 fid = v9fs_fid_lookup(dentry);
856 v9fs_blank_wstat(&wstat);
857 if (iattr->ia_valid & ATTR_MODE)
858 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
860 if (iattr->ia_valid & ATTR_MTIME)
861 wstat.mtime = iattr->ia_mtime.tv_sec;
863 if (iattr->ia_valid & ATTR_ATIME)
864 wstat.atime = iattr->ia_atime.tv_sec;
866 if (iattr->ia_valid & ATTR_SIZE)
867 wstat.length = iattr->ia_size;
869 if (v9fs_proto_dotu(v9ses)) {
870 if (iattr->ia_valid & ATTR_UID)
871 wstat.n_uid = iattr->ia_uid;
873 if (iattr->ia_valid & ATTR_GID)
874 wstat.n_gid = iattr->ia_gid;
877 retval = p9_client_wstat(fid, &wstat);
879 retval = inode_setattr(dentry->d_inode, iattr);
885 * v9fs_stat2inode - populate an inode structure with mistat info
886 * @stat: Plan 9 metadata (mistat) structure
887 * @inode: inode to populate
888 * @sb: superblock of filesystem
893 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
894 struct super_block *sb)
898 unsigned int i_nlink;
899 struct v9fs_session_info *v9ses = sb->s_fs_info;
903 inode->i_atime.tv_sec = stat->atime;
904 inode->i_mtime.tv_sec = stat->mtime;
905 inode->i_ctime.tv_sec = stat->mtime;
907 inode->i_uid = v9ses->dfltuid;
908 inode->i_gid = v9ses->dfltgid;
910 if (v9fs_proto_dotu(v9ses)) {
911 inode->i_uid = stat->n_uid;
912 inode->i_gid = stat->n_gid;
914 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
915 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
917 * Hadlink support got added later to
918 * to the .u extension. So there can be
919 * server out there that doesn't support
920 * this even with .u extension. So check
921 * for non NULL stat->extension
923 strncpy(ext, stat->extension, sizeof(ext));
924 /* HARDLINKCOUNT %u */
925 sscanf(ext, "%13s %u", tag_name, &i_nlink);
926 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
927 inode->i_nlink = i_nlink;
930 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
931 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
936 strncpy(ext, stat->extension, sizeof(ext));
937 sscanf(ext, "%c %u %u", &type, &major, &minor);
940 inode->i_mode &= ~S_IFBLK;
941 inode->i_mode |= S_IFCHR;
946 P9_DPRINTK(P9_DEBUG_ERROR,
947 "Unknown special type %c %s\n", type,
950 inode->i_rdev = MKDEV(major, minor);
951 init_special_inode(inode, inode->i_mode, inode->i_rdev);
955 i_size_write(inode, stat->length);
957 /* not real number of blocks, but 512 byte ones ... */
958 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
962 * v9fs_qid2ino - convert qid into inode number
965 * BUG: potential for inode number collisions?
968 ino_t v9fs_qid2ino(struct p9_qid *qid)
970 u64 path = qid->path + 2;
973 if (sizeof(ino_t) == sizeof(path))
974 memcpy(&i, &path, sizeof(ino_t));
976 i = (ino_t) (path ^ (path >> 32));
982 * v9fs_readlink - read a symlink's location (internal version)
983 * @dentry: dentry for symlink
984 * @buffer: buffer to load symlink location into
985 * @buflen: length of buffer
989 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
993 struct v9fs_session_info *v9ses;
997 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
999 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1000 fid = v9fs_fid_lookup(dentry);
1002 return PTR_ERR(fid);
1004 if (!v9fs_proto_dotu(v9ses))
1007 st = p9_client_stat(fid);
1011 if (!(st->mode & P9_DMSYMLINK)) {
1016 /* copy extension buffer into buffer */
1017 strncpy(buffer, st->extension, buflen);
1019 P9_DPRINTK(P9_DEBUG_VFS,
1020 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
1022 retval = strnlen(buffer, buflen);
1029 * v9fs_vfs_follow_link - follow a symlink path
1030 * @dentry: dentry for symlink
1035 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1038 char *link = __getname();
1040 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1043 link = ERR_PTR(-ENOMEM);
1045 len = v9fs_readlink(dentry, link, PATH_MAX);
1049 link = ERR_PTR(len);
1051 link[min(len, PATH_MAX-1)] = 0;
1053 nd_set_link(nd, link);
1059 * v9fs_vfs_put_link - release a symlink path
1060 * @dentry: dentry for symlink
1067 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1069 char *s = nd_get_link(nd);
1071 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1072 IS_ERR(s) ? "<error>" : s);
1078 * v9fs_vfs_mkspecial - create a special file
1079 * @dir: inode to create special file in
1080 * @dentry: dentry to create
1081 * @mode: mode to create special file
1082 * @extension: 9p2000.u format extension string representing special file
1086 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1087 int mode, const char *extension)
1090 struct v9fs_session_info *v9ses;
1093 v9ses = v9fs_inode2v9ses(dir);
1094 if (!v9fs_proto_dotu(v9ses)) {
1095 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1099 perm = unixmode2p9mode(v9ses, mode);
1100 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1103 return PTR_ERR(fid);
1105 p9_client_clunk(fid);
1110 * v9fs_vfs_symlink - helper function to create symlinks
1111 * @dir: directory inode containing symlink
1112 * @dentry: dentry for symlink
1113 * @symname: symlink data
1115 * See Also: 9P2000.u RFC for more information
1120 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1122 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1123 dentry->d_name.name, symname);
1125 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1129 * v9fs_vfs_link - create a hardlink
1130 * @old_dentry: dentry for file to link to
1131 * @dir: inode destination for new link
1132 * @dentry: dentry for link
1137 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1138 struct dentry *dentry)
1141 struct p9_fid *oldfid;
1144 P9_DPRINTK(P9_DEBUG_VFS,
1145 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1146 old_dentry->d_name.name);
1148 oldfid = v9fs_fid_clone(old_dentry);
1150 return PTR_ERR(oldfid);
1153 if (unlikely(!name)) {
1158 sprintf(name, "%d\n", oldfid->fid);
1159 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1163 p9_client_clunk(oldfid);
1168 * v9fs_vfs_mknod - create a special file
1169 * @dir: inode destination for new link
1170 * @dentry: dentry for file
1171 * @mode: mode for creation
1172 * @rdev: device associated with special file
1177 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1182 P9_DPRINTK(P9_DEBUG_VFS,
1183 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1184 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1186 if (!new_valid_dev(rdev))
1192 /* build extension */
1194 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1195 else if (S_ISCHR(mode))
1196 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1197 else if (S_ISFIFO(mode))
1204 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1210 static const struct inode_operations v9fs_dir_inode_operations_ext = {
1211 .create = v9fs_vfs_create,
1212 .lookup = v9fs_vfs_lookup,
1213 .symlink = v9fs_vfs_symlink,
1214 .link = v9fs_vfs_link,
1215 .unlink = v9fs_vfs_unlink,
1216 .mkdir = v9fs_vfs_mkdir,
1217 .rmdir = v9fs_vfs_rmdir,
1218 .mknod = v9fs_vfs_mknod,
1219 .rename = v9fs_vfs_rename,
1220 .getattr = v9fs_vfs_getattr,
1221 .setattr = v9fs_vfs_setattr,
1224 static const struct inode_operations v9fs_dir_inode_operations = {
1225 .create = v9fs_vfs_create,
1226 .lookup = v9fs_vfs_lookup,
1227 .unlink = v9fs_vfs_unlink,
1228 .mkdir = v9fs_vfs_mkdir,
1229 .rmdir = v9fs_vfs_rmdir,
1230 .mknod = v9fs_vfs_mknod,
1231 .rename = v9fs_vfs_rename,
1232 .getattr = v9fs_vfs_getattr,
1233 .setattr = v9fs_vfs_setattr,
1236 static const struct inode_operations v9fs_file_inode_operations = {
1237 .getattr = v9fs_vfs_getattr,
1238 .setattr = v9fs_vfs_setattr,
1241 static const struct inode_operations v9fs_symlink_inode_operations = {
1242 .readlink = generic_readlink,
1243 .follow_link = v9fs_vfs_follow_link,
1244 .put_link = v9fs_vfs_put_link,
1245 .getattr = v9fs_vfs_getattr,
1246 .setattr = v9fs_vfs_setattr,