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 err = v9fs_fid_add(dentry, fid);
481 p9_client_clunk(dfid);
484 p9_client_clunk(ofid);
487 p9_client_clunk(fid);
493 * v9fs_vfs_create - VFS hook to create files
494 * @dir: directory inode that is being created
495 * @dentry: dentry that is being deleted
496 * @mode: create permissions
497 * @nd: path information
502 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
503 struct nameidata *nd)
508 struct v9fs_session_info *v9ses;
514 v9ses = v9fs_inode2v9ses(dir);
515 perm = unixmode2p9mode(v9ses, mode);
516 if (nd && nd->flags & LOOKUP_OPEN)
517 flags = nd->intent.open.flags - 1;
521 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
522 v9fs_uflags2omode(flags, v9fs_extended(v9ses)));
529 /* if we are opening a file, assign the open fid to the file */
530 if (nd && nd->flags & LOOKUP_OPEN) {
531 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
537 filp->private_data = fid;
539 p9_client_clunk(fid);
545 p9_client_clunk(fid);
551 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
552 * @dir: inode that is being unlinked
553 * @dentry: dentry that is being unlinked
554 * @mode: mode for new directory
558 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
562 struct v9fs_session_info *v9ses;
565 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
567 v9ses = v9fs_inode2v9ses(dir);
568 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
569 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
576 p9_client_clunk(fid);
582 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
583 * @dir: inode that is being walked from
584 * @dentry: dentry that is being walked to?
585 * @nameidata: path data
589 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
590 struct nameidata *nameidata)
592 struct super_block *sb;
593 struct v9fs_session_info *v9ses;
594 struct p9_fid *dfid, *fid;
599 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
600 dir, dentry->d_name.name, dentry, nameidata);
603 v9ses = v9fs_inode2v9ses(dir);
604 dfid = v9fs_fid_lookup(dentry->d_parent);
606 return ERR_CAST(dfid);
608 name = (char *) dentry->d_name.name;
609 fid = p9_client_walk(dfid, 1, &name, 1);
611 result = PTR_ERR(fid);
612 if (result == -ENOENT) {
617 return ERR_PTR(result);
620 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
622 result = PTR_ERR(inode);
627 result = v9fs_fid_add(dentry, fid);
631 if ((fid->qid.version) && (v9ses->cache))
632 dentry->d_op = &v9fs_cached_dentry_operations;
634 dentry->d_op = &v9fs_dentry_operations;
636 d_add(dentry, inode);
640 p9_client_clunk(fid);
642 return ERR_PTR(result);
646 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
647 * @i: inode that is being unlinked
648 * @d: dentry that is being unlinked
652 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
654 return v9fs_remove(i, d, 0);
658 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
659 * @i: inode that is being unlinked
660 * @d: dentry that is being unlinked
664 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
666 return v9fs_remove(i, d, 1);
670 * v9fs_vfs_rename - VFS hook to rename an inode
671 * @old_dir: old dir inode
672 * @old_dentry: old dentry
673 * @new_dir: new dir inode
674 * @new_dentry: new dentry
679 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
680 struct inode *new_dir, struct dentry *new_dentry)
682 struct inode *old_inode;
683 struct v9fs_session_info *v9ses;
684 struct p9_fid *oldfid;
685 struct p9_fid *olddirfid;
686 struct p9_fid *newdirfid;
687 struct p9_wstat wstat;
690 P9_DPRINTK(P9_DEBUG_VFS, "\n");
692 old_inode = old_dentry->d_inode;
693 v9ses = v9fs_inode2v9ses(old_inode);
694 oldfid = v9fs_fid_lookup(old_dentry);
696 return PTR_ERR(oldfid);
698 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
699 if (IS_ERR(olddirfid)) {
700 retval = PTR_ERR(olddirfid);
704 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
705 if (IS_ERR(newdirfid)) {
706 retval = PTR_ERR(newdirfid);
710 /* 9P can only handle file rename in the same directory */
711 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
712 P9_DPRINTK(P9_DEBUG_ERROR,
713 "old dir and new dir are different\n");
718 v9fs_blank_wstat(&wstat);
719 wstat.muid = v9ses->uname;
720 wstat.name = (char *) new_dentry->d_name.name;
721 retval = p9_client_wstat(oldfid, &wstat);
724 p9_client_clunk(newdirfid);
727 p9_client_clunk(olddirfid);
734 * v9fs_vfs_getattr - retrieve file metadata
735 * @mnt: mount information
736 * @dentry: file to get attributes on
737 * @stat: metadata structure to populate
742 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
746 struct v9fs_session_info *v9ses;
750 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
752 v9ses = v9fs_inode2v9ses(dentry->d_inode);
753 if (v9ses->cache == CACHE_LOOSE)
754 return simple_getattr(mnt, dentry, stat);
756 fid = v9fs_fid_lookup(dentry);
760 st = p9_client_stat(fid);
764 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
765 generic_fillattr(dentry->d_inode, stat);
772 * v9fs_vfs_setattr - set file metadata
773 * @dentry: file whose metadata to set
774 * @iattr: metadata assignment structure
778 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
781 struct v9fs_session_info *v9ses;
783 struct p9_wstat wstat;
785 P9_DPRINTK(P9_DEBUG_VFS, "\n");
787 v9ses = v9fs_inode2v9ses(dentry->d_inode);
788 fid = v9fs_fid_lookup(dentry);
792 v9fs_blank_wstat(&wstat);
793 if (iattr->ia_valid & ATTR_MODE)
794 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
796 if (iattr->ia_valid & ATTR_MTIME)
797 wstat.mtime = iattr->ia_mtime.tv_sec;
799 if (iattr->ia_valid & ATTR_ATIME)
800 wstat.atime = iattr->ia_atime.tv_sec;
802 if (iattr->ia_valid & ATTR_SIZE)
803 wstat.length = iattr->ia_size;
805 if (v9fs_extended(v9ses)) {
806 if (iattr->ia_valid & ATTR_UID)
807 wstat.n_uid = iattr->ia_uid;
809 if (iattr->ia_valid & ATTR_GID)
810 wstat.n_gid = iattr->ia_gid;
813 retval = p9_client_wstat(fid, &wstat);
815 retval = inode_setattr(dentry->d_inode, iattr);
821 * v9fs_stat2inode - populate an inode structure with mistat info
822 * @stat: Plan 9 metadata (mistat) structure
823 * @inode: inode to populate
824 * @sb: superblock of filesystem
829 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
830 struct super_block *sb)
833 struct v9fs_session_info *v9ses = sb->s_fs_info;
837 inode->i_atime.tv_sec = stat->atime;
838 inode->i_mtime.tv_sec = stat->mtime;
839 inode->i_ctime.tv_sec = stat->mtime;
841 inode->i_uid = v9ses->dfltuid;
842 inode->i_gid = v9ses->dfltgid;
844 if (v9fs_extended(v9ses)) {
845 inode->i_uid = stat->n_uid;
846 inode->i_gid = stat->n_gid;
849 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
850 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
855 strncpy(ext, stat->extension, sizeof(ext));
856 sscanf(ext, "%c %u %u", &type, &major, &minor);
859 inode->i_mode &= ~S_IFBLK;
860 inode->i_mode |= S_IFCHR;
865 P9_DPRINTK(P9_DEBUG_ERROR,
866 "Unknown special type %c %s\n", type,
869 inode->i_rdev = MKDEV(major, minor);
870 init_special_inode(inode, inode->i_mode, inode->i_rdev);
874 inode->i_size = stat->length;
876 /* not real number of blocks, but 512 byte ones ... */
877 inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
881 * v9fs_qid2ino - convert qid into inode number
884 * BUG: potential for inode number collisions?
887 ino_t v9fs_qid2ino(struct p9_qid *qid)
889 u64 path = qid->path + 2;
892 if (sizeof(ino_t) == sizeof(path))
893 memcpy(&i, &path, sizeof(ino_t));
895 i = (ino_t) (path ^ (path >> 32));
901 * v9fs_readlink - read a symlink's location (internal version)
902 * @dentry: dentry for symlink
903 * @buffer: buffer to load symlink location into
904 * @buflen: length of buffer
908 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
912 struct v9fs_session_info *v9ses;
916 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
918 v9ses = v9fs_inode2v9ses(dentry->d_inode);
919 fid = v9fs_fid_lookup(dentry);
923 if (!v9fs_extended(v9ses))
926 st = p9_client_stat(fid);
930 if (!(st->mode & P9_DMSYMLINK)) {
935 /* copy extension buffer into buffer */
936 strncpy(buffer, st->extension, buflen);
938 P9_DPRINTK(P9_DEBUG_VFS,
939 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
949 * v9fs_vfs_readlink - read a symlink's location
950 * @dentry: dentry for symlink
951 * @buffer: buffer to load symlink location into
952 * @buflen: length of buffer
956 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
961 char *link = __getname();
966 if (buflen > PATH_MAX)
969 P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
972 retval = v9fs_readlink(dentry, link, buflen);
975 if ((ret = copy_to_user(buffer, link, retval)) != 0) {
976 P9_DPRINTK(P9_DEBUG_ERROR,
977 "problem copying to user: %d\n", ret);
987 * v9fs_vfs_follow_link - follow a symlink path
988 * @dentry: dentry for symlink
993 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
996 char *link = __getname();
998 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1001 link = ERR_PTR(-ENOMEM);
1003 len = v9fs_readlink(dentry, link, PATH_MAX);
1007 link = ERR_PTR(len);
1011 nd_set_link(nd, link);
1017 * v9fs_vfs_put_link - release a symlink path
1018 * @dentry: dentry for symlink
1025 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1027 char *s = nd_get_link(nd);
1029 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1030 IS_ERR(s) ? "<error>" : s);
1036 * v9fs_vfs_mkspecial - create a special file
1037 * @dir: inode to create special file in
1038 * @dentry: dentry to create
1039 * @mode: mode to create special file
1040 * @extension: 9p2000.u format extension string representing special file
1044 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1045 int mode, const char *extension)
1048 struct v9fs_session_info *v9ses;
1051 v9ses = v9fs_inode2v9ses(dir);
1052 if (!v9fs_extended(v9ses)) {
1053 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1057 perm = unixmode2p9mode(v9ses, mode);
1058 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1061 return PTR_ERR(fid);
1063 p9_client_clunk(fid);
1068 * v9fs_vfs_symlink - helper function to create symlinks
1069 * @dir: directory inode containing symlink
1070 * @dentry: dentry for symlink
1071 * @symname: symlink data
1073 * See Also: 9P2000.u RFC for more information
1078 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1080 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1081 dentry->d_name.name, symname);
1083 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1087 * v9fs_vfs_link - create a hardlink
1088 * @old_dentry: dentry for file to link to
1089 * @dir: inode destination for new link
1090 * @dentry: dentry for link
1095 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1096 struct dentry *dentry)
1099 struct p9_fid *oldfid;
1102 P9_DPRINTK(P9_DEBUG_VFS,
1103 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1104 old_dentry->d_name.name);
1106 oldfid = v9fs_fid_clone(old_dentry);
1108 return PTR_ERR(oldfid);
1111 if (unlikely(!name)) {
1116 sprintf(name, "%d\n", oldfid->fid);
1117 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1121 p9_client_clunk(oldfid);
1126 * v9fs_vfs_mknod - create a special file
1127 * @dir: inode destination for new link
1128 * @dentry: dentry for file
1129 * @mode: mode for creation
1130 * @rdev: device associated with special file
1135 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1140 P9_DPRINTK(P9_DEBUG_VFS,
1141 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1142 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1144 if (!new_valid_dev(rdev))
1150 /* build extension */
1152 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1153 else if (S_ISCHR(mode))
1154 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1155 else if (S_ISFIFO(mode))
1162 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1168 static const struct inode_operations v9fs_dir_inode_operations_ext = {
1169 .create = v9fs_vfs_create,
1170 .lookup = v9fs_vfs_lookup,
1171 .symlink = v9fs_vfs_symlink,
1172 .link = v9fs_vfs_link,
1173 .unlink = v9fs_vfs_unlink,
1174 .mkdir = v9fs_vfs_mkdir,
1175 .rmdir = v9fs_vfs_rmdir,
1176 .mknod = v9fs_vfs_mknod,
1177 .rename = v9fs_vfs_rename,
1178 .readlink = v9fs_vfs_readlink,
1179 .getattr = v9fs_vfs_getattr,
1180 .setattr = v9fs_vfs_setattr,
1183 static const struct inode_operations v9fs_dir_inode_operations = {
1184 .create = v9fs_vfs_create,
1185 .lookup = v9fs_vfs_lookup,
1186 .unlink = v9fs_vfs_unlink,
1187 .mkdir = v9fs_vfs_mkdir,
1188 .rmdir = v9fs_vfs_rmdir,
1189 .mknod = v9fs_vfs_mknod,
1190 .rename = v9fs_vfs_rename,
1191 .getattr = v9fs_vfs_getattr,
1192 .setattr = v9fs_vfs_setattr,
1195 static const struct inode_operations v9fs_file_inode_operations = {
1196 .getattr = v9fs_vfs_getattr,
1197 .setattr = v9fs_vfs_setattr,
1200 static const struct inode_operations v9fs_symlink_inode_operations = {
1201 .readlink = v9fs_vfs_readlink,
1202 .follow_link = v9fs_vfs_follow_link,
1203 .put_link = v9fs_vfs_put_link,
1204 .getattr = v9fs_vfs_getattr,
1205 .setattr = v9fs_vfs_setattr,