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>
44 static const struct inode_operations v9fs_dir_inode_operations;
45 static const struct inode_operations v9fs_dir_inode_operations_ext;
46 static const struct inode_operations v9fs_file_inode_operations;
47 static const struct inode_operations v9fs_symlink_inode_operations;
50 * unixmode2p9mode - convert unix mode bits to plan 9
51 * @v9ses: v9fs session information
52 * @mode: mode to convert
56 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
62 if (v9fs_extended(v9ses)) {
65 if (v9ses->nodev == 0) {
69 res |= P9_DMNAMEDPIPE;
76 if ((mode & S_ISUID) == S_ISUID)
78 if ((mode & S_ISGID) == S_ISGID)
80 if ((mode & S_ISVTX) == S_ISVTX)
82 if ((mode & P9_DMLINK))
90 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
91 * @v9ses: v9fs session information
92 * @mode: mode to convert
96 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
102 if ((mode & P9_DMDIR) == P9_DMDIR)
104 else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses)))
106 else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses))
107 && (v9ses->nodev == 0))
109 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses))
110 && (v9ses->nodev == 0))
112 else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses))
113 && (v9ses->nodev == 0))
118 if (v9fs_extended(v9ses)) {
119 if ((mode & P9_DMSETUID) == P9_DMSETUID)
122 if ((mode & P9_DMSETGID) == P9_DMSETGID)
125 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
133 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
134 * @uflags: flags to convert
135 * @extended: if .u extensions are active
138 int v9fs_uflags2omode(int uflags, int extended)
158 if (uflags & O_TRUNC)
165 if (uflags & O_APPEND)
173 * v9fs_blank_wstat - helper function to setup a 9P stat structure
174 * @v9ses: 9P session info (for determining extended mode)
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;
202 * v9fs_get_inode - helper function to setup an inode
204 * @mode: mode to setup inode with
208 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
211 struct v9fs_session_info *v9ses = sb->s_fs_info;
213 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
215 inode = new_inode(sb);
217 inode->i_mode = mode;
218 inode->i_uid = current->fsuid;
219 inode->i_gid = current->fsgid;
222 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
223 inode->i_mapping->a_ops = &v9fs_addr_operations;
225 switch (mode & S_IFMT) {
230 if (!v9fs_extended(v9ses)) {
231 P9_DPRINTK(P9_DEBUG_ERROR,
232 "special files without extended mode\n");
233 return ERR_PTR(-EINVAL);
235 init_special_inode(inode, inode->i_mode,
239 inode->i_op = &v9fs_file_inode_operations;
240 inode->i_fop = &v9fs_file_operations;
243 if (!v9fs_extended(v9ses)) {
244 P9_DPRINTK(P9_DEBUG_ERROR,
245 "extended modes used w/o 9P2000.u\n");
246 return ERR_PTR(-EINVAL);
248 inode->i_op = &v9fs_symlink_inode_operations;
252 if (v9fs_extended(v9ses))
253 inode->i_op = &v9fs_dir_inode_operations_ext;
255 inode->i_op = &v9fs_dir_inode_operations;
256 inode->i_fop = &v9fs_dir_operations;
259 P9_DPRINTK(P9_DEBUG_ERROR,
260 "BAD mode 0x%x S_IFMT 0x%x\n",
261 mode, mode & S_IFMT);
262 return ERR_PTR(-EINVAL);
265 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
266 return ERR_PTR(-ENOMEM);
272 static struct v9fs_fid*
273 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
277 struct v9fs_fid *ret;
278 struct v9fs_fcall *fcall;
280 nfid = v9fs_get_idpool(&v9ses->fidpool);
282 eprintk(KERN_WARNING, "no free fids available\n");
283 return ERR_PTR(-ENOSPC);
286 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
290 if (fcall && fcall->id == RWALK)
293 PRINT_FCALL_ERROR("walk error", fcall);
294 v9fs_put_idpool(nfid, &v9ses->fidpool);
300 ret = v9fs_fid_create(v9ses, nfid);
306 err = v9fs_fid_insert(ret, dentry);
308 v9fs_fid_destroy(ret);
315 v9fs_t_clunk(v9ses, nfid);
324 * v9fs_inode_from_fid - populate an inode by issuing a attribute request
325 * @v9ses: session information
326 * @fid: fid to issue attribute request for
327 * @sb: superblock on which to create inode
331 static struct inode *
332 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
333 struct super_block *sb)
340 st = p9_client_stat(fid);
347 umode = p9mode2unixmode(v9ses, st->mode);
348 ret = v9fs_get_inode(sb, umode);
355 v9fs_stat2inode(st, ret, sb);
356 ret->i_ino = v9fs_qid2ino(&st->qid);
369 * v9fs_remove - helper function to remove files and directories
370 * @dir: directory inode that is being deleted
371 * @file: dentry that is being deleted
372 * @rmdir: removing a directory
376 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
378 struct inode *file_inode;
379 struct v9fs_session_info *v9ses;
380 struct p9_fid *v9fid;
382 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
385 file_inode = file->d_inode;
386 v9ses = v9fs_inode2v9ses(file_inode);
387 v9fid = v9fs_fid_clone(file);
389 return PTR_ERR(v9fid);
391 return p9_client_remove(v9fid);
395 v9fs_open_created(struct inode *inode, struct file *file)
402 * v9fs_create - Create a file
403 * @v9ses: session information
404 * @dir: directory that dentry is being created in
405 * @dentry: dentry that is being created
406 * @perm: create permissions
408 * @extension: 9p2000.u extension string to support devices, etc.
411 static struct p9_fid *
412 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
413 struct dentry *dentry, char *extension, u32 perm, u8 mode)
417 struct p9_fid *dfid, *ofid, *fid;
420 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
425 name = (char *) dentry->d_name.name;
426 dfid = v9fs_fid_clone(dentry->d_parent);
429 P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
434 /* clone a fid to use for creation */
435 ofid = p9_client_walk(dfid, 0, NULL, 1);
438 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
443 err = p9_client_fcreate(ofid, name, perm, mode, extension);
445 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
449 /* now walk from the parent so we can get unopened fid */
450 fid = p9_client_walk(dfid, 1, &name, 0);
453 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
459 /* instantiate inode and assign the unopened fid to the dentry */
460 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
462 err = PTR_ERR(inode);
463 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
468 dentry->d_op = &v9fs_cached_dentry_operations;
470 dentry->d_op = &v9fs_dentry_operations;
472 d_instantiate(dentry, inode);
473 v9fs_fid_add(dentry, fid);
478 p9_client_clunk(dfid);
481 p9_client_clunk(ofid);
484 p9_client_clunk(fid);
490 * v9fs_vfs_create - VFS hook to create files
491 * @dir: directory inode that is being created
492 * @dentry: dentry that is being deleted
493 * @mode: create permissions
494 * @nd: path information
499 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
500 struct nameidata *nd)
505 struct v9fs_session_info *v9ses;
511 v9ses = v9fs_inode2v9ses(dir);
512 perm = unixmode2p9mode(v9ses, mode);
513 if (nd && nd->flags & LOOKUP_OPEN)
514 flags = nd->intent.open.flags - 1;
518 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
519 v9fs_uflags2omode(flags, v9fs_extended(v9ses)));
526 /* if we are opening a file, assign the open fid to the file */
527 if (nd && nd->flags & LOOKUP_OPEN) {
528 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
534 filp->private_data = fid;
536 p9_client_clunk(fid);
542 p9_client_clunk(fid);
548 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
549 * @dir: inode that is being unlinked
550 * @dentry: dentry that is being unlinked
551 * @mode: mode for new directory
555 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
559 struct v9fs_session_info *v9ses;
562 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
564 v9ses = v9fs_inode2v9ses(dir);
565 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
566 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
573 p9_client_clunk(fid);
579 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
580 * @dir: inode that is being walked from
581 * @dentry: dentry that is being walked to?
582 * @nameidata: path data
586 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
587 struct nameidata *nameidata)
589 struct super_block *sb;
590 struct v9fs_session_info *v9ses;
591 struct p9_fid *dfid, *fid;
596 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
597 dir, dentry->d_name.name, dentry, nameidata);
600 v9ses = v9fs_inode2v9ses(dir);
601 dfid = v9fs_fid_lookup(dentry->d_parent);
603 return ERR_CAST(dfid);
605 name = (char *) dentry->d_name.name;
606 fid = p9_client_walk(dfid, 1, &name, 1);
608 result = PTR_ERR(fid);
609 if (result == -ENOENT) {
614 return ERR_PTR(result);
617 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
619 result = PTR_ERR(inode);
624 result = v9fs_fid_add(dentry, fid);
628 if ((fid->qid.version) && (v9ses->cache))
629 dentry->d_op = &v9fs_cached_dentry_operations;
631 dentry->d_op = &v9fs_dentry_operations;
633 d_add(dentry, inode);
637 p9_client_clunk(fid);
639 return ERR_PTR(result);
643 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
644 * @i: inode that is being unlinked
645 * @d: dentry that is being unlinked
649 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
651 return v9fs_remove(i, d, 0);
655 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
656 * @i: inode that is being unlinked
657 * @d: dentry that is being unlinked
661 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
663 return v9fs_remove(i, d, 1);
667 * v9fs_vfs_rename - VFS hook to rename an inode
668 * @old_dir: old dir inode
669 * @old_dentry: old dentry
670 * @new_dir: new dir inode
671 * @new_dentry: new dentry
676 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
677 struct inode *new_dir, struct dentry *new_dentry)
679 struct inode *old_inode;
680 struct v9fs_session_info *v9ses;
681 struct p9_fid *oldfid;
682 struct p9_fid *olddirfid;
683 struct p9_fid *newdirfid;
684 struct p9_wstat wstat;
687 P9_DPRINTK(P9_DEBUG_VFS, "\n");
689 old_inode = old_dentry->d_inode;
690 v9ses = v9fs_inode2v9ses(old_inode);
691 oldfid = v9fs_fid_lookup(old_dentry);
693 return PTR_ERR(oldfid);
695 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
696 if (IS_ERR(olddirfid)) {
697 retval = PTR_ERR(olddirfid);
701 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
702 if (IS_ERR(newdirfid)) {
703 retval = PTR_ERR(newdirfid);
707 /* 9P can only handle file rename in the same directory */
708 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
709 P9_DPRINTK(P9_DEBUG_ERROR,
710 "old dir and new dir are different\n");
715 v9fs_blank_wstat(&wstat);
716 wstat.muid = v9ses->uname;
717 wstat.name = (char *) new_dentry->d_name.name;
718 retval = p9_client_wstat(oldfid, &wstat);
721 p9_client_clunk(newdirfid);
724 p9_client_clunk(olddirfid);
731 * v9fs_vfs_getattr - retrieve file metadata
732 * @mnt: mount information
733 * @dentry: file to get attributes on
734 * @stat: metadata structure to populate
739 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
743 struct v9fs_session_info *v9ses;
747 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
749 v9ses = v9fs_inode2v9ses(dentry->d_inode);
750 if (v9ses->cache == CACHE_LOOSE)
751 return simple_getattr(mnt, dentry, stat);
753 fid = v9fs_fid_lookup(dentry);
757 st = p9_client_stat(fid);
761 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
762 generic_fillattr(dentry->d_inode, stat);
769 * v9fs_vfs_setattr - set file metadata
770 * @dentry: file whose metadata to set
771 * @iattr: metadata assignment structure
775 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
778 struct v9fs_session_info *v9ses;
780 struct p9_wstat wstat;
782 P9_DPRINTK(P9_DEBUG_VFS, "\n");
784 v9ses = v9fs_inode2v9ses(dentry->d_inode);
785 fid = v9fs_fid_lookup(dentry);
789 v9fs_blank_wstat(&wstat);
790 if (iattr->ia_valid & ATTR_MODE)
791 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
793 if (iattr->ia_valid & ATTR_MTIME)
794 wstat.mtime = iattr->ia_mtime.tv_sec;
796 if (iattr->ia_valid & ATTR_ATIME)
797 wstat.atime = iattr->ia_atime.tv_sec;
799 if (iattr->ia_valid & ATTR_SIZE)
800 wstat.length = iattr->ia_size;
802 if (v9fs_extended(v9ses)) {
803 if (iattr->ia_valid & ATTR_UID)
804 wstat.n_uid = iattr->ia_uid;
806 if (iattr->ia_valid & ATTR_GID)
807 wstat.n_gid = iattr->ia_gid;
810 retval = p9_client_wstat(fid, &wstat);
812 retval = inode_setattr(dentry->d_inode, iattr);
818 * v9fs_stat2inode - populate an inode structure with mistat info
819 * @stat: Plan 9 metadata (mistat) structure
820 * @inode: inode to populate
821 * @sb: superblock of filesystem
826 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
827 struct super_block *sb)
830 struct v9fs_session_info *v9ses = sb->s_fs_info;
834 inode->i_atime.tv_sec = stat->atime;
835 inode->i_mtime.tv_sec = stat->mtime;
836 inode->i_ctime.tv_sec = stat->mtime;
838 inode->i_uid = v9ses->dfltuid;
839 inode->i_gid = v9ses->dfltgid;
841 if (v9fs_extended(v9ses)) {
842 inode->i_uid = stat->n_uid;
843 inode->i_gid = stat->n_gid;
846 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
847 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
852 strncpy(ext, stat->extension, sizeof(ext));
853 sscanf(ext, "%c %u %u", &type, &major, &minor);
856 inode->i_mode &= ~S_IFBLK;
857 inode->i_mode |= S_IFCHR;
862 P9_DPRINTK(P9_DEBUG_ERROR,
863 "Unknown special type %c %s\n", type,
866 inode->i_rdev = MKDEV(major, minor);
867 init_special_inode(inode, inode->i_mode, inode->i_rdev);
871 inode->i_size = stat->length;
873 /* not real number of blocks, but 512 byte ones ... */
874 inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
878 * v9fs_qid2ino - convert qid into inode number
881 * BUG: potential for inode number collisions?
884 ino_t v9fs_qid2ino(struct p9_qid *qid)
886 u64 path = qid->path + 2;
889 if (sizeof(ino_t) == sizeof(path))
890 memcpy(&i, &path, sizeof(ino_t));
892 i = (ino_t) (path ^ (path >> 32));
898 * v9fs_readlink - read a symlink's location (internal version)
899 * @dentry: dentry for symlink
900 * @buffer: buffer to load symlink location into
901 * @buflen: length of buffer
905 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
909 struct v9fs_session_info *v9ses;
913 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
915 v9ses = v9fs_inode2v9ses(dentry->d_inode);
916 fid = v9fs_fid_lookup(dentry);
920 if (!v9fs_extended(v9ses))
923 st = p9_client_stat(fid);
927 if (!(st->mode & P9_DMSYMLINK)) {
932 /* copy extension buffer into buffer */
933 strncpy(buffer, st->extension, buflen);
935 P9_DPRINTK(P9_DEBUG_VFS,
936 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
946 * v9fs_vfs_readlink - read a symlink's location
947 * @dentry: dentry for symlink
948 * @buffer: buffer to load symlink location into
949 * @buflen: length of buffer
953 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
958 char *link = __getname();
963 if (buflen > PATH_MAX)
966 P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
969 retval = v9fs_readlink(dentry, link, buflen);
972 if ((ret = copy_to_user(buffer, link, retval)) != 0) {
973 P9_DPRINTK(P9_DEBUG_ERROR,
974 "problem copying to user: %d\n", ret);
984 * v9fs_vfs_follow_link - follow a symlink path
985 * @dentry: dentry for symlink
990 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
993 char *link = __getname();
995 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
998 link = ERR_PTR(-ENOMEM);
1000 len = v9fs_readlink(dentry, link, PATH_MAX);
1004 link = ERR_PTR(len);
1008 nd_set_link(nd, link);
1014 * v9fs_vfs_put_link - release a symlink path
1015 * @dentry: dentry for symlink
1022 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1024 char *s = nd_get_link(nd);
1026 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1027 IS_ERR(s) ? "<error>" : s);
1033 * v9fs_vfs_mkspecial - create a special file
1034 * @dir: inode to create special file in
1035 * @dentry: dentry to create
1036 * @mode: mode to create special file
1037 * @extension: 9p2000.u format extension string representing special file
1041 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1042 int mode, const char *extension)
1045 struct v9fs_session_info *v9ses;
1048 v9ses = v9fs_inode2v9ses(dir);
1049 if (!v9fs_extended(v9ses)) {
1050 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1054 perm = unixmode2p9mode(v9ses, mode);
1055 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1058 return PTR_ERR(fid);
1060 p9_client_clunk(fid);
1065 * v9fs_vfs_symlink - helper function to create symlinks
1066 * @dir: directory inode containing symlink
1067 * @dentry: dentry for symlink
1068 * @symname: symlink data
1070 * See Also: 9P2000.u RFC for more information
1075 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1077 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1078 dentry->d_name.name, symname);
1080 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1084 * v9fs_vfs_link - create a hardlink
1085 * @old_dentry: dentry for file to link to
1086 * @dir: inode destination for new link
1087 * @dentry: dentry for link
1092 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1093 struct dentry *dentry)
1096 struct p9_fid *oldfid;
1099 P9_DPRINTK(P9_DEBUG_VFS,
1100 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1101 old_dentry->d_name.name);
1103 oldfid = v9fs_fid_clone(old_dentry);
1105 return PTR_ERR(oldfid);
1108 if (unlikely(!name)) {
1113 sprintf(name, "%d\n", oldfid->fid);
1114 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1118 p9_client_clunk(oldfid);
1123 * v9fs_vfs_mknod - create a special file
1124 * @dir: inode destination for new link
1125 * @dentry: dentry for file
1126 * @mode: mode for creation
1127 * @rdev: device associated with special file
1132 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1137 P9_DPRINTK(P9_DEBUG_VFS,
1138 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1139 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1141 if (!new_valid_dev(rdev))
1147 /* build extension */
1149 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1150 else if (S_ISCHR(mode))
1151 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1152 else if (S_ISFIFO(mode))
1159 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1165 static const struct inode_operations v9fs_dir_inode_operations_ext = {
1166 .create = v9fs_vfs_create,
1167 .lookup = v9fs_vfs_lookup,
1168 .symlink = v9fs_vfs_symlink,
1169 .link = v9fs_vfs_link,
1170 .unlink = v9fs_vfs_unlink,
1171 .mkdir = v9fs_vfs_mkdir,
1172 .rmdir = v9fs_vfs_rmdir,
1173 .mknod = v9fs_vfs_mknod,
1174 .rename = v9fs_vfs_rename,
1175 .readlink = v9fs_vfs_readlink,
1176 .getattr = v9fs_vfs_getattr,
1177 .setattr = v9fs_vfs_setattr,
1180 static const struct inode_operations v9fs_dir_inode_operations = {
1181 .create = v9fs_vfs_create,
1182 .lookup = v9fs_vfs_lookup,
1183 .unlink = v9fs_vfs_unlink,
1184 .mkdir = v9fs_vfs_mkdir,
1185 .rmdir = v9fs_vfs_rmdir,
1186 .mknod = v9fs_vfs_mknod,
1187 .rename = v9fs_vfs_rename,
1188 .getattr = v9fs_vfs_getattr,
1189 .setattr = v9fs_vfs_setattr,
1192 static const struct inode_operations v9fs_file_inode_operations = {
1193 .getattr = v9fs_vfs_getattr,
1194 .setattr = v9fs_vfs_setattr,
1197 static const struct inode_operations v9fs_symlink_inode_operations = {
1198 .readlink = v9fs_vfs_readlink,
1199 .follow_link = v9fs_vfs_follow_link,
1200 .put_link = v9fs_vfs_put_link,
1201 .getattr = v9fs_vfs_getattr,
1202 .setattr = v9fs_vfs_setattr,