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)
212 struct v9fs_session_info *v9ses = sb->s_fs_info;
214 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
216 inode = new_inode(sb);
218 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
222 inode->i_mode = mode;
223 inode->i_uid = current_fsuid();
224 inode->i_gid = current_fsgid();
227 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
228 inode->i_mapping->a_ops = &v9fs_addr_operations;
230 switch (mode & S_IFMT) {
235 if (!v9fs_extended(v9ses)) {
236 P9_DPRINTK(P9_DEBUG_ERROR,
237 "special files without extended mode\n");
241 init_special_inode(inode, inode->i_mode, inode->i_rdev);
244 inode->i_op = &v9fs_file_inode_operations;
245 inode->i_fop = &v9fs_file_operations;
248 if (!v9fs_extended(v9ses)) {
249 P9_DPRINTK(P9_DEBUG_ERROR,
250 "extended modes used w/o 9P2000.u\n");
254 inode->i_op = &v9fs_symlink_inode_operations;
258 if (v9fs_extended(v9ses))
259 inode->i_op = &v9fs_dir_inode_operations_ext;
261 inode->i_op = &v9fs_dir_inode_operations;
262 inode->i_fop = &v9fs_dir_operations;
265 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
266 mode, mode & S_IFMT);
279 static struct v9fs_fid*
280 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
284 struct v9fs_fid *ret;
285 struct v9fs_fcall *fcall;
287 nfid = v9fs_get_idpool(&v9ses->fidpool);
289 eprintk(KERN_WARNING, "no free fids available\n");
290 return ERR_PTR(-ENOSPC);
293 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
297 if (fcall && fcall->id == RWALK)
300 PRINT_FCALL_ERROR("walk error", fcall);
301 v9fs_put_idpool(nfid, &v9ses->fidpool);
307 ret = v9fs_fid_create(v9ses, nfid);
313 err = v9fs_fid_insert(ret, dentry);
315 v9fs_fid_destroy(ret);
322 v9fs_t_clunk(v9ses, nfid);
331 * v9fs_inode_from_fid - populate an inode by issuing a attribute request
332 * @v9ses: session information
333 * @fid: fid to issue attribute request for
334 * @sb: superblock on which to create inode
338 static struct inode *
339 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
340 struct super_block *sb)
347 st = p9_client_stat(fid);
354 umode = p9mode2unixmode(v9ses, st->mode);
355 ret = v9fs_get_inode(sb, umode);
362 v9fs_stat2inode(st, ret, sb);
363 ret->i_ino = v9fs_qid2ino(&st->qid);
376 * v9fs_remove - helper function to remove files and directories
377 * @dir: directory inode that is being deleted
378 * @file: dentry that is being deleted
379 * @rmdir: removing a directory
383 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
385 struct inode *file_inode;
386 struct v9fs_session_info *v9ses;
387 struct p9_fid *v9fid;
389 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
392 file_inode = file->d_inode;
393 v9ses = v9fs_inode2v9ses(file_inode);
394 v9fid = v9fs_fid_clone(file);
396 return PTR_ERR(v9fid);
398 return p9_client_remove(v9fid);
402 v9fs_open_created(struct inode *inode, struct file *file)
409 * v9fs_create - Create a file
410 * @v9ses: session information
411 * @dir: directory that dentry is being created in
412 * @dentry: dentry that is being created
413 * @perm: create permissions
415 * @extension: 9p2000.u extension string to support devices, etc.
418 static struct p9_fid *
419 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
420 struct dentry *dentry, char *extension, u32 perm, u8 mode)
424 struct p9_fid *dfid, *ofid, *fid;
427 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
432 name = (char *) dentry->d_name.name;
433 dfid = v9fs_fid_clone(dentry->d_parent);
436 P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
441 /* clone a fid to use for creation */
442 ofid = p9_client_walk(dfid, 0, NULL, 1);
445 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
450 err = p9_client_fcreate(ofid, name, perm, mode, extension);
452 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
456 /* now walk from the parent so we can get unopened fid */
457 fid = p9_client_walk(dfid, 1, &name, 0);
460 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
466 /* instantiate inode and assign the unopened fid to the dentry */
467 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
469 err = PTR_ERR(inode);
470 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
475 dentry->d_op = &v9fs_cached_dentry_operations;
477 dentry->d_op = &v9fs_dentry_operations;
479 d_instantiate(dentry, inode);
480 err = v9fs_fid_add(dentry, fid);
488 p9_client_clunk(dfid);
491 p9_client_clunk(ofid);
494 p9_client_clunk(fid);
500 * v9fs_vfs_create - VFS hook to create files
501 * @dir: directory inode that is being created
502 * @dentry: dentry that is being deleted
503 * @mode: create permissions
504 * @nd: path information
509 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
510 struct nameidata *nd)
515 struct v9fs_session_info *v9ses;
521 v9ses = v9fs_inode2v9ses(dir);
522 perm = unixmode2p9mode(v9ses, mode);
523 if (nd && nd->flags & LOOKUP_OPEN)
524 flags = nd->intent.open.flags - 1;
528 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
529 v9fs_uflags2omode(flags, v9fs_extended(v9ses)));
536 /* if we are opening a file, assign the open fid to the file */
537 if (nd && nd->flags & LOOKUP_OPEN) {
538 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
544 filp->private_data = fid;
546 p9_client_clunk(fid);
552 p9_client_clunk(fid);
558 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
559 * @dir: inode that is being unlinked
560 * @dentry: dentry that is being unlinked
561 * @mode: mode for new directory
565 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
569 struct v9fs_session_info *v9ses;
572 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
574 v9ses = v9fs_inode2v9ses(dir);
575 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
576 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
583 p9_client_clunk(fid);
589 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
590 * @dir: inode that is being walked from
591 * @dentry: dentry that is being walked to?
592 * @nameidata: path data
596 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
597 struct nameidata *nameidata)
599 struct super_block *sb;
600 struct v9fs_session_info *v9ses;
601 struct p9_fid *dfid, *fid;
606 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
607 dir, dentry->d_name.name, dentry, nameidata);
610 v9ses = v9fs_inode2v9ses(dir);
611 dfid = v9fs_fid_lookup(dentry->d_parent);
613 return ERR_CAST(dfid);
615 name = (char *) dentry->d_name.name;
616 fid = p9_client_walk(dfid, 1, &name, 1);
618 result = PTR_ERR(fid);
619 if (result == -ENOENT) {
624 return ERR_PTR(result);
627 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
629 result = PTR_ERR(inode);
634 result = v9fs_fid_add(dentry, fid);
638 if ((fid->qid.version) && (v9ses->cache))
639 dentry->d_op = &v9fs_cached_dentry_operations;
641 dentry->d_op = &v9fs_dentry_operations;
643 d_add(dentry, inode);
647 p9_client_clunk(fid);
649 return ERR_PTR(result);
653 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
654 * @i: inode that is being unlinked
655 * @d: dentry that is being unlinked
659 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
661 return v9fs_remove(i, d, 0);
665 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
666 * @i: inode that is being unlinked
667 * @d: dentry that is being unlinked
671 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
673 return v9fs_remove(i, d, 1);
677 * v9fs_vfs_rename - VFS hook to rename an inode
678 * @old_dir: old dir inode
679 * @old_dentry: old dentry
680 * @new_dir: new dir inode
681 * @new_dentry: new dentry
686 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
687 struct inode *new_dir, struct dentry *new_dentry)
689 struct inode *old_inode;
690 struct v9fs_session_info *v9ses;
691 struct p9_fid *oldfid;
692 struct p9_fid *olddirfid;
693 struct p9_fid *newdirfid;
694 struct p9_wstat wstat;
697 P9_DPRINTK(P9_DEBUG_VFS, "\n");
699 old_inode = old_dentry->d_inode;
700 v9ses = v9fs_inode2v9ses(old_inode);
701 oldfid = v9fs_fid_lookup(old_dentry);
703 return PTR_ERR(oldfid);
705 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
706 if (IS_ERR(olddirfid)) {
707 retval = PTR_ERR(olddirfid);
711 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
712 if (IS_ERR(newdirfid)) {
713 retval = PTR_ERR(newdirfid);
717 /* 9P can only handle file rename in the same directory */
718 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
719 P9_DPRINTK(P9_DEBUG_ERROR,
720 "old dir and new dir are different\n");
725 v9fs_blank_wstat(&wstat);
726 wstat.muid = v9ses->uname;
727 wstat.name = (char *) new_dentry->d_name.name;
728 retval = p9_client_wstat(oldfid, &wstat);
731 p9_client_clunk(newdirfid);
734 p9_client_clunk(olddirfid);
741 * v9fs_vfs_getattr - retrieve file metadata
742 * @mnt: mount information
743 * @dentry: file to get attributes on
744 * @stat: metadata structure to populate
749 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
753 struct v9fs_session_info *v9ses;
757 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
759 v9ses = v9fs_inode2v9ses(dentry->d_inode);
760 if (v9ses->cache == CACHE_LOOSE)
761 return simple_getattr(mnt, dentry, stat);
763 fid = v9fs_fid_lookup(dentry);
767 st = p9_client_stat(fid);
771 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
772 generic_fillattr(dentry->d_inode, stat);
779 * v9fs_vfs_setattr - set file metadata
780 * @dentry: file whose metadata to set
781 * @iattr: metadata assignment structure
785 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
788 struct v9fs_session_info *v9ses;
790 struct p9_wstat wstat;
792 P9_DPRINTK(P9_DEBUG_VFS, "\n");
794 v9ses = v9fs_inode2v9ses(dentry->d_inode);
795 fid = v9fs_fid_lookup(dentry);
799 v9fs_blank_wstat(&wstat);
800 if (iattr->ia_valid & ATTR_MODE)
801 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
803 if (iattr->ia_valid & ATTR_MTIME)
804 wstat.mtime = iattr->ia_mtime.tv_sec;
806 if (iattr->ia_valid & ATTR_ATIME)
807 wstat.atime = iattr->ia_atime.tv_sec;
809 if (iattr->ia_valid & ATTR_SIZE)
810 wstat.length = iattr->ia_size;
812 if (v9fs_extended(v9ses)) {
813 if (iattr->ia_valid & ATTR_UID)
814 wstat.n_uid = iattr->ia_uid;
816 if (iattr->ia_valid & ATTR_GID)
817 wstat.n_gid = iattr->ia_gid;
820 retval = p9_client_wstat(fid, &wstat);
822 retval = inode_setattr(dentry->d_inode, iattr);
828 * v9fs_stat2inode - populate an inode structure with mistat info
829 * @stat: Plan 9 metadata (mistat) structure
830 * @inode: inode to populate
831 * @sb: superblock of filesystem
836 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
837 struct super_block *sb)
840 struct v9fs_session_info *v9ses = sb->s_fs_info;
844 inode->i_atime.tv_sec = stat->atime;
845 inode->i_mtime.tv_sec = stat->mtime;
846 inode->i_ctime.tv_sec = stat->mtime;
848 inode->i_uid = v9ses->dfltuid;
849 inode->i_gid = v9ses->dfltgid;
851 if (v9fs_extended(v9ses)) {
852 inode->i_uid = stat->n_uid;
853 inode->i_gid = stat->n_gid;
856 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
857 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
862 strncpy(ext, stat->extension, sizeof(ext));
863 sscanf(ext, "%c %u %u", &type, &major, &minor);
866 inode->i_mode &= ~S_IFBLK;
867 inode->i_mode |= S_IFCHR;
872 P9_DPRINTK(P9_DEBUG_ERROR,
873 "Unknown special type %c %s\n", type,
876 inode->i_rdev = MKDEV(major, minor);
877 init_special_inode(inode, inode->i_mode, inode->i_rdev);
881 inode->i_size = stat->length;
883 /* not real number of blocks, but 512 byte ones ... */
884 inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
888 * v9fs_qid2ino - convert qid into inode number
891 * BUG: potential for inode number collisions?
894 ino_t v9fs_qid2ino(struct p9_qid *qid)
896 u64 path = qid->path + 2;
899 if (sizeof(ino_t) == sizeof(path))
900 memcpy(&i, &path, sizeof(ino_t));
902 i = (ino_t) (path ^ (path >> 32));
908 * v9fs_readlink - read a symlink's location (internal version)
909 * @dentry: dentry for symlink
910 * @buffer: buffer to load symlink location into
911 * @buflen: length of buffer
915 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
919 struct v9fs_session_info *v9ses;
923 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
925 v9ses = v9fs_inode2v9ses(dentry->d_inode);
926 fid = v9fs_fid_lookup(dentry);
930 if (!v9fs_extended(v9ses))
933 st = p9_client_stat(fid);
937 if (!(st->mode & P9_DMSYMLINK)) {
942 /* copy extension buffer into buffer */
943 strncpy(buffer, st->extension, buflen);
945 P9_DPRINTK(P9_DEBUG_VFS,
946 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
956 * v9fs_vfs_readlink - read a symlink's location
957 * @dentry: dentry for symlink
958 * @buffer: buffer to load symlink location into
959 * @buflen: length of buffer
963 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
968 char *link = __getname();
973 if (buflen > PATH_MAX)
976 P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
979 retval = v9fs_readlink(dentry, link, buflen);
982 if ((ret = copy_to_user(buffer, link, retval)) != 0) {
983 P9_DPRINTK(P9_DEBUG_ERROR,
984 "problem copying to user: %d\n", ret);
994 * v9fs_vfs_follow_link - follow a symlink path
995 * @dentry: dentry for symlink
1000 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1003 char *link = __getname();
1005 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1008 link = ERR_PTR(-ENOMEM);
1010 len = v9fs_readlink(dentry, link, PATH_MAX);
1014 link = ERR_PTR(len);
1018 nd_set_link(nd, link);
1024 * v9fs_vfs_put_link - release a symlink path
1025 * @dentry: dentry for symlink
1032 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1034 char *s = nd_get_link(nd);
1036 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1037 IS_ERR(s) ? "<error>" : s);
1043 * v9fs_vfs_mkspecial - create a special file
1044 * @dir: inode to create special file in
1045 * @dentry: dentry to create
1046 * @mode: mode to create special file
1047 * @extension: 9p2000.u format extension string representing special file
1051 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1052 int mode, const char *extension)
1055 struct v9fs_session_info *v9ses;
1058 v9ses = v9fs_inode2v9ses(dir);
1059 if (!v9fs_extended(v9ses)) {
1060 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1064 perm = unixmode2p9mode(v9ses, mode);
1065 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1068 return PTR_ERR(fid);
1070 p9_client_clunk(fid);
1075 * v9fs_vfs_symlink - helper function to create symlinks
1076 * @dir: directory inode containing symlink
1077 * @dentry: dentry for symlink
1078 * @symname: symlink data
1080 * See Also: 9P2000.u RFC for more information
1085 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1087 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1088 dentry->d_name.name, symname);
1090 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1094 * v9fs_vfs_link - create a hardlink
1095 * @old_dentry: dentry for file to link to
1096 * @dir: inode destination for new link
1097 * @dentry: dentry for link
1102 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1103 struct dentry *dentry)
1106 struct p9_fid *oldfid;
1109 P9_DPRINTK(P9_DEBUG_VFS,
1110 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1111 old_dentry->d_name.name);
1113 oldfid = v9fs_fid_clone(old_dentry);
1115 return PTR_ERR(oldfid);
1118 if (unlikely(!name)) {
1123 sprintf(name, "%d\n", oldfid->fid);
1124 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1128 p9_client_clunk(oldfid);
1133 * v9fs_vfs_mknod - create a special file
1134 * @dir: inode destination for new link
1135 * @dentry: dentry for file
1136 * @mode: mode for creation
1137 * @rdev: device associated with special file
1142 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1147 P9_DPRINTK(P9_DEBUG_VFS,
1148 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1149 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1151 if (!new_valid_dev(rdev))
1157 /* build extension */
1159 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1160 else if (S_ISCHR(mode))
1161 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1162 else if (S_ISFIFO(mode))
1169 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1175 static const struct inode_operations v9fs_dir_inode_operations_ext = {
1176 .create = v9fs_vfs_create,
1177 .lookup = v9fs_vfs_lookup,
1178 .symlink = v9fs_vfs_symlink,
1179 .link = v9fs_vfs_link,
1180 .unlink = v9fs_vfs_unlink,
1181 .mkdir = v9fs_vfs_mkdir,
1182 .rmdir = v9fs_vfs_rmdir,
1183 .mknod = v9fs_vfs_mknod,
1184 .rename = v9fs_vfs_rename,
1185 .readlink = v9fs_vfs_readlink,
1186 .getattr = v9fs_vfs_getattr,
1187 .setattr = v9fs_vfs_setattr,
1190 static const struct inode_operations v9fs_dir_inode_operations = {
1191 .create = v9fs_vfs_create,
1192 .lookup = v9fs_vfs_lookup,
1193 .unlink = v9fs_vfs_unlink,
1194 .mkdir = v9fs_vfs_mkdir,
1195 .rmdir = v9fs_vfs_rmdir,
1196 .mknod = v9fs_vfs_mknod,
1197 .rename = v9fs_vfs_rename,
1198 .getattr = v9fs_vfs_getattr,
1199 .setattr = v9fs_vfs_setattr,
1202 static const struct inode_operations v9fs_file_inode_operations = {
1203 .getattr = v9fs_vfs_getattr,
1204 .setattr = v9fs_vfs_setattr,
1207 static const struct inode_operations v9fs_symlink_inode_operations = {
1208 .readlink = v9fs_vfs_readlink,
1209 .follow_link = v9fs_vfs_follow_link,
1210 .put_link = v9fs_vfs_put_link,
1211 .getattr = v9fs_vfs_getattr,
1212 .setattr = v9fs_vfs_setattr,