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)
436 struct inode *file_inode;
437 struct v9fs_session_info *v9ses;
438 struct p9_fid *v9fid;
440 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
443 file_inode = file->d_inode;
444 v9ses = v9fs_inode2v9ses(file_inode);
445 v9fid = v9fs_fid_clone(file);
447 return PTR_ERR(v9fid);
449 retval = p9_client_remove(v9fid);
451 drop_nlink(file_inode);
456 v9fs_open_created(struct inode *inode, struct file *file)
463 * v9fs_create - Create a file
464 * @v9ses: session information
465 * @dir: directory that dentry is being created in
466 * @dentry: dentry that is being created
467 * @extension: 9p2000.u extension string to support devices, etc.
468 * @perm: create permissions
472 static struct p9_fid *
473 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
474 struct dentry *dentry, char *extension, u32 perm, u8 mode)
478 struct p9_fid *dfid, *ofid, *fid;
481 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
486 name = (char *) dentry->d_name.name;
487 dfid = v9fs_fid_clone(dentry->d_parent);
490 P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
495 /* clone a fid to use for creation */
496 ofid = p9_client_walk(dfid, 0, NULL, 1);
499 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
504 err = p9_client_fcreate(ofid, name, perm, mode, extension);
506 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
510 /* now walk from the parent so we can get unopened fid */
511 fid = p9_client_walk(dfid, 1, &name, 0);
514 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
520 /* instantiate inode and assign the unopened fid to the dentry */
521 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
523 err = PTR_ERR(inode);
524 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
529 dentry->d_op = &v9fs_cached_dentry_operations;
531 dentry->d_op = &v9fs_dentry_operations;
533 d_instantiate(dentry, inode);
534 err = v9fs_fid_add(dentry, fid);
542 p9_client_clunk(dfid);
545 p9_client_clunk(ofid);
548 p9_client_clunk(fid);
554 * v9fs_vfs_create - VFS hook to create files
555 * @dir: directory inode that is being created
556 * @dentry: dentry that is being deleted
557 * @mode: create permissions
558 * @nd: path information
563 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
564 struct nameidata *nd)
569 struct v9fs_session_info *v9ses;
575 v9ses = v9fs_inode2v9ses(dir);
576 perm = unixmode2p9mode(v9ses, mode);
577 if (nd && nd->flags & LOOKUP_OPEN)
578 flags = nd->intent.open.flags - 1;
582 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
583 v9fs_uflags2omode(flags,
584 v9fs_proto_dotu(v9ses)));
591 /* if we are opening a file, assign the open fid to the file */
592 if (nd && nd->flags & LOOKUP_OPEN) {
593 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
599 filp->private_data = fid;
601 p9_client_clunk(fid);
607 p9_client_clunk(fid);
613 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
614 * @dir: inode that is being unlinked
615 * @dentry: dentry that is being unlinked
616 * @mode: mode for new directory
620 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
624 struct v9fs_session_info *v9ses;
627 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
629 v9ses = v9fs_inode2v9ses(dir);
630 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
631 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
638 p9_client_clunk(fid);
644 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
645 * @dir: inode that is being walked from
646 * @dentry: dentry that is being walked to?
647 * @nameidata: path data
651 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
652 struct nameidata *nameidata)
654 struct super_block *sb;
655 struct v9fs_session_info *v9ses;
656 struct p9_fid *dfid, *fid;
661 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
662 dir, dentry->d_name.name, dentry, nameidata);
664 if (dentry->d_name.len > NAME_MAX)
665 return ERR_PTR(-ENAMETOOLONG);
668 v9ses = v9fs_inode2v9ses(dir);
669 dfid = v9fs_fid_lookup(dentry->d_parent);
671 return ERR_CAST(dfid);
673 name = (char *) dentry->d_name.name;
674 fid = p9_client_walk(dfid, 1, &name, 1);
676 result = PTR_ERR(fid);
677 if (result == -ENOENT) {
682 return ERR_PTR(result);
685 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
687 result = PTR_ERR(inode);
692 result = v9fs_fid_add(dentry, fid);
696 if ((fid->qid.version) && (v9ses->cache))
697 dentry->d_op = &v9fs_cached_dentry_operations;
699 dentry->d_op = &v9fs_dentry_operations;
701 d_add(dentry, inode);
705 p9_client_clunk(fid);
707 return ERR_PTR(result);
711 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
712 * @i: inode that is being unlinked
713 * @d: dentry that is being unlinked
717 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
719 return v9fs_remove(i, d, 0);
723 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
724 * @i: inode that is being unlinked
725 * @d: dentry that is being unlinked
729 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
731 return v9fs_remove(i, d, 1);
735 * v9fs_vfs_rename - VFS hook to rename an inode
736 * @old_dir: old dir inode
737 * @old_dentry: old dentry
738 * @new_dir: new dir inode
739 * @new_dentry: new dentry
744 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
745 struct inode *new_dir, struct dentry *new_dentry)
747 struct inode *old_inode;
748 struct v9fs_session_info *v9ses;
749 struct p9_fid *oldfid;
750 struct p9_fid *olddirfid;
751 struct p9_fid *newdirfid;
752 struct p9_wstat wstat;
755 P9_DPRINTK(P9_DEBUG_VFS, "\n");
757 old_inode = old_dentry->d_inode;
758 v9ses = v9fs_inode2v9ses(old_inode);
759 oldfid = v9fs_fid_lookup(old_dentry);
761 return PTR_ERR(oldfid);
763 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
764 if (IS_ERR(olddirfid)) {
765 retval = PTR_ERR(olddirfid);
769 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
770 if (IS_ERR(newdirfid)) {
771 retval = PTR_ERR(newdirfid);
775 /* 9P can only handle file rename in the same directory */
776 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
777 P9_DPRINTK(P9_DEBUG_ERROR,
778 "old dir and new dir are different\n");
783 v9fs_blank_wstat(&wstat);
784 wstat.muid = v9ses->uname;
785 wstat.name = (char *) new_dentry->d_name.name;
786 retval = p9_client_wstat(oldfid, &wstat);
789 p9_client_clunk(newdirfid);
792 p9_client_clunk(olddirfid);
799 * v9fs_vfs_getattr - retrieve file metadata
800 * @mnt: mount information
801 * @dentry: file to get attributes on
802 * @stat: metadata structure to populate
807 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
811 struct v9fs_session_info *v9ses;
815 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
817 v9ses = v9fs_inode2v9ses(dentry->d_inode);
818 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
819 return simple_getattr(mnt, dentry, stat);
821 fid = v9fs_fid_lookup(dentry);
825 st = p9_client_stat(fid);
829 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
830 generic_fillattr(dentry->d_inode, stat);
837 * v9fs_vfs_setattr - set file metadata
838 * @dentry: file whose metadata to set
839 * @iattr: metadata assignment structure
843 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
846 struct v9fs_session_info *v9ses;
848 struct p9_wstat wstat;
850 P9_DPRINTK(P9_DEBUG_VFS, "\n");
852 v9ses = v9fs_inode2v9ses(dentry->d_inode);
853 fid = v9fs_fid_lookup(dentry);
857 v9fs_blank_wstat(&wstat);
858 if (iattr->ia_valid & ATTR_MODE)
859 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
861 if (iattr->ia_valid & ATTR_MTIME)
862 wstat.mtime = iattr->ia_mtime.tv_sec;
864 if (iattr->ia_valid & ATTR_ATIME)
865 wstat.atime = iattr->ia_atime.tv_sec;
867 if (iattr->ia_valid & ATTR_SIZE)
868 wstat.length = iattr->ia_size;
870 if (v9fs_proto_dotu(v9ses)) {
871 if (iattr->ia_valid & ATTR_UID)
872 wstat.n_uid = iattr->ia_uid;
874 if (iattr->ia_valid & ATTR_GID)
875 wstat.n_gid = iattr->ia_gid;
878 retval = p9_client_wstat(fid, &wstat);
880 retval = inode_setattr(dentry->d_inode, iattr);
886 * v9fs_stat2inode - populate an inode structure with mistat info
887 * @stat: Plan 9 metadata (mistat) structure
888 * @inode: inode to populate
889 * @sb: superblock of filesystem
894 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
895 struct super_block *sb)
899 unsigned int i_nlink;
900 struct v9fs_session_info *v9ses = sb->s_fs_info;
904 inode->i_atime.tv_sec = stat->atime;
905 inode->i_mtime.tv_sec = stat->mtime;
906 inode->i_ctime.tv_sec = stat->mtime;
908 inode->i_uid = v9ses->dfltuid;
909 inode->i_gid = v9ses->dfltgid;
911 if (v9fs_proto_dotu(v9ses)) {
912 inode->i_uid = stat->n_uid;
913 inode->i_gid = stat->n_gid;
915 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
916 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
918 * Hadlink support got added later to
919 * to the .u extension. So there can be
920 * server out there that doesn't support
921 * this even with .u extension. So check
922 * for non NULL stat->extension
924 strncpy(ext, stat->extension, sizeof(ext));
925 /* HARDLINKCOUNT %u */
926 sscanf(ext, "%13s %u", tag_name, &i_nlink);
927 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
928 inode->i_nlink = i_nlink;
931 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
932 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
937 strncpy(ext, stat->extension, sizeof(ext));
938 sscanf(ext, "%c %u %u", &type, &major, &minor);
941 inode->i_mode &= ~S_IFBLK;
942 inode->i_mode |= S_IFCHR;
947 P9_DPRINTK(P9_DEBUG_ERROR,
948 "Unknown special type %c %s\n", type,
951 inode->i_rdev = MKDEV(major, minor);
952 init_special_inode(inode, inode->i_mode, inode->i_rdev);
956 i_size_write(inode, stat->length);
958 /* not real number of blocks, but 512 byte ones ... */
959 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
963 * v9fs_qid2ino - convert qid into inode number
966 * BUG: potential for inode number collisions?
969 ino_t v9fs_qid2ino(struct p9_qid *qid)
971 u64 path = qid->path + 2;
974 if (sizeof(ino_t) == sizeof(path))
975 memcpy(&i, &path, sizeof(ino_t));
977 i = (ino_t) (path ^ (path >> 32));
983 * v9fs_readlink - read a symlink's location (internal version)
984 * @dentry: dentry for symlink
985 * @buffer: buffer to load symlink location into
986 * @buflen: length of buffer
990 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
994 struct v9fs_session_info *v9ses;
998 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
1000 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1001 fid = v9fs_fid_lookup(dentry);
1003 return PTR_ERR(fid);
1005 if (!v9fs_proto_dotu(v9ses))
1008 st = p9_client_stat(fid);
1012 if (!(st->mode & P9_DMSYMLINK)) {
1017 /* copy extension buffer into buffer */
1018 strncpy(buffer, st->extension, buflen);
1020 P9_DPRINTK(P9_DEBUG_VFS,
1021 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
1023 retval = strnlen(buffer, buflen);
1030 * v9fs_vfs_follow_link - follow a symlink path
1031 * @dentry: dentry for symlink
1036 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1039 char *link = __getname();
1041 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1044 link = ERR_PTR(-ENOMEM);
1046 len = v9fs_readlink(dentry, link, PATH_MAX);
1050 link = ERR_PTR(len);
1052 link[min(len, PATH_MAX-1)] = 0;
1054 nd_set_link(nd, link);
1060 * v9fs_vfs_put_link - release a symlink path
1061 * @dentry: dentry for symlink
1068 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1070 char *s = nd_get_link(nd);
1072 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1073 IS_ERR(s) ? "<error>" : s);
1079 * v9fs_vfs_mkspecial - create a special file
1080 * @dir: inode to create special file in
1081 * @dentry: dentry to create
1082 * @mode: mode to create special file
1083 * @extension: 9p2000.u format extension string representing special file
1087 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1088 int mode, const char *extension)
1091 struct v9fs_session_info *v9ses;
1094 v9ses = v9fs_inode2v9ses(dir);
1095 if (!v9fs_proto_dotu(v9ses)) {
1096 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1100 perm = unixmode2p9mode(v9ses, mode);
1101 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1104 return PTR_ERR(fid);
1106 p9_client_clunk(fid);
1111 * v9fs_vfs_symlink - helper function to create symlinks
1112 * @dir: directory inode containing symlink
1113 * @dentry: dentry for symlink
1114 * @symname: symlink data
1116 * See Also: 9P2000.u RFC for more information
1121 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1123 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1124 dentry->d_name.name, symname);
1126 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1130 * v9fs_vfs_link - create a hardlink
1131 * @old_dentry: dentry for file to link to
1132 * @dir: inode destination for new link
1133 * @dentry: dentry for link
1138 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1139 struct dentry *dentry)
1142 struct p9_fid *oldfid;
1145 P9_DPRINTK(P9_DEBUG_VFS,
1146 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1147 old_dentry->d_name.name);
1149 oldfid = v9fs_fid_clone(old_dentry);
1151 return PTR_ERR(oldfid);
1154 if (unlikely(!name)) {
1159 sprintf(name, "%d\n", oldfid->fid);
1160 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1164 p9_client_clunk(oldfid);
1169 * v9fs_vfs_mknod - create a special file
1170 * @dir: inode destination for new link
1171 * @dentry: dentry for file
1172 * @mode: mode for creation
1173 * @rdev: device associated with special file
1178 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1183 P9_DPRINTK(P9_DEBUG_VFS,
1184 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1185 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1187 if (!new_valid_dev(rdev))
1193 /* build extension */
1195 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1196 else if (S_ISCHR(mode))
1197 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1198 else if (S_ISFIFO(mode))
1205 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1211 static const struct inode_operations v9fs_dir_inode_operations_ext = {
1212 .create = v9fs_vfs_create,
1213 .lookup = v9fs_vfs_lookup,
1214 .symlink = v9fs_vfs_symlink,
1215 .link = v9fs_vfs_link,
1216 .unlink = v9fs_vfs_unlink,
1217 .mkdir = v9fs_vfs_mkdir,
1218 .rmdir = v9fs_vfs_rmdir,
1219 .mknod = v9fs_vfs_mknod,
1220 .rename = v9fs_vfs_rename,
1221 .getattr = v9fs_vfs_getattr,
1222 .setattr = v9fs_vfs_setattr,
1225 static const struct inode_operations v9fs_dir_inode_operations = {
1226 .create = v9fs_vfs_create,
1227 .lookup = v9fs_vfs_lookup,
1228 .unlink = v9fs_vfs_unlink,
1229 .mkdir = v9fs_vfs_mkdir,
1230 .rmdir = v9fs_vfs_rmdir,
1231 .mknod = v9fs_vfs_mknod,
1232 .rename = v9fs_vfs_rename,
1233 .getattr = v9fs_vfs_getattr,
1234 .setattr = v9fs_vfs_setattr,
1237 static const struct inode_operations v9fs_file_inode_operations = {
1238 .getattr = v9fs_vfs_getattr,
1239 .setattr = v9fs_vfs_setattr,
1242 static const struct inode_operations v9fs_symlink_inode_operations = {
1243 .readlink = generic_readlink,
1244 .follow_link = v9fs_vfs_follow_link,
1245 .put_link = v9fs_vfs_put_link,
1246 .getattr = v9fs_vfs_getattr,
1247 .setattr = v9fs_vfs_setattr,