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/smp_lock.h>
34 #include <linux/inet.h>
35 #include <linux/namei.h>
36 #include <linux/idr.h>
44 static struct inode_operations v9fs_dir_inode_operations;
45 static struct inode_operations v9fs_dir_inode_operations_ext;
46 static struct inode_operations v9fs_file_inode_operations;
47 static 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 (v9ses->extended) {
64 res |= V9FS_DMSYMLINK;
65 if (v9ses->nodev == 0) {
69 res |= V9FS_DMNAMEDPIPE;
76 if ((mode & S_ISUID) == S_ISUID)
78 if ((mode & S_ISGID) == S_ISGID)
80 if ((mode & V9FS_DMLINK))
88 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
89 * @v9ses: v9fs session information
90 * @mode: mode to convert
94 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
100 if ((mode & V9FS_DMDIR) == V9FS_DMDIR)
102 else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended))
104 else if ((mode & V9FS_DMSOCKET) && (v9ses->extended)
105 && (v9ses->nodev == 0))
107 else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended)
108 && (v9ses->nodev == 0))
110 else if ((mode & V9FS_DMDEVICE) && (v9ses->extended)
111 && (v9ses->nodev == 0))
116 if (v9ses->extended) {
117 if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID)
120 if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID)
127 int v9fs_uflags2omode(int uflags)
150 if (uflags & O_TRUNC)
153 if (uflags & O_APPEND)
160 * v9fs_blank_wstat - helper function to setup a 9P stat structure
161 * @v9ses: 9P session info (for determining extended mode)
162 * @wstat: structure to initialize
167 v9fs_blank_wstat(struct v9fs_wstat *wstat)
171 wstat->qid.type = ~0;
172 wstat->qid.version = ~0;
173 *((long long *)&wstat->qid.path) = ~0;
185 wstat->extension = NULL;
189 * v9fs_get_inode - helper function to setup an inode
191 * @mode: mode to setup inode with
195 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
198 struct v9fs_session_info *v9ses = sb->s_fs_info;
200 dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
202 inode = new_inode(sb);
204 inode->i_mode = mode;
205 inode->i_uid = current->fsuid;
206 inode->i_gid = current->fsgid;
207 inode->i_blksize = sb->s_blocksize;
210 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
211 inode->i_mapping->a_ops = &v9fs_addr_operations;
213 switch (mode & S_IFMT) {
218 if(!v9ses->extended) {
219 dprintk(DEBUG_ERROR, "special files without extended mode\n");
220 return ERR_PTR(-EINVAL);
222 init_special_inode(inode, inode->i_mode,
226 inode->i_op = &v9fs_file_inode_operations;
227 inode->i_fop = &v9fs_file_operations;
230 if(!v9ses->extended) {
231 dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n");
232 return ERR_PTR(-EINVAL);
234 inode->i_op = &v9fs_symlink_inode_operations;
239 inode->i_op = &v9fs_dir_inode_operations_ext;
241 inode->i_op = &v9fs_dir_inode_operations;
242 inode->i_fop = &v9fs_dir_operations;
245 dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
246 mode, mode & S_IFMT);
247 return ERR_PTR(-EINVAL);
250 eprintk(KERN_WARNING, "Problem allocating inode\n");
251 return ERR_PTR(-ENOMEM);
257 v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm,
258 u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit)
262 struct v9fs_fcall *fcall;
264 fid = v9fs_get_idpool(&v9ses->fidpool);
266 eprintk(KERN_WARNING, "no free fids available\n");
270 err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
272 PRINT_FCALL_ERROR("clone error", fcall);
277 err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall);
279 PRINT_FCALL_ERROR("create fails", fcall);
284 *iounit = fcall->params.rcreate.iounit;
287 *qid = fcall->params.rcreate.qid;
296 v9fs_t_clunk(v9ses, fid);
301 v9fs_put_idpool(fid, &v9ses->fidpool);
307 static struct v9fs_fid*
308 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
312 struct v9fs_fid *ret;
313 struct v9fs_fcall *fcall;
315 nfid = v9fs_get_idpool(&v9ses->fidpool);
317 eprintk(KERN_WARNING, "no free fids available\n");
318 return ERR_PTR(-ENOSPC);
321 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
325 PRINT_FCALL_ERROR("walk error", fcall);
326 v9fs_put_idpool(nfid, &v9ses->fidpool);
332 ret = v9fs_fid_create(v9ses, nfid);
338 err = v9fs_fid_insert(ret, dentry);
340 v9fs_fid_destroy(ret);
347 v9fs_t_clunk(v9ses, nfid);
354 static struct inode *
355 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid,
356 struct super_block *sb)
360 struct v9fs_fcall *fcall;
363 err = v9fs_t_stat(v9ses, fid, &fcall);
365 PRINT_FCALL_ERROR("stat error", fcall);
369 umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode);
370 ret = v9fs_get_inode(sb, umode);
377 v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb);
390 * v9fs_remove - helper function to remove files and directories
391 * @dir: directory inode that is being deleted
392 * @file: dentry that is being deleted
393 * @rmdir: removing a directory
397 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
399 struct v9fs_fcall *fcall = NULL;
400 struct super_block *sb = NULL;
401 struct v9fs_session_info *v9ses = NULL;
402 struct v9fs_fid *v9fid = NULL;
403 struct inode *file_inode = NULL;
407 dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
410 file_inode = file->d_inode;
411 sb = file_inode->i_sb;
412 v9ses = v9fs_inode2v9ses(file_inode);
413 v9fid = v9fs_fid_lookup(file);
423 dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n",
428 result = v9fs_t_remove(v9ses, fid, &fcall);
430 PRINT_FCALL_ERROR("remove fails", fcall);
432 v9fs_put_idpool(fid, &v9ses->fidpool);
433 v9fs_fid_destroy(v9fid);
441 v9fs_open_created(struct inode *inode, struct file *file)
447 * v9fs_vfs_create - VFS hook to create files
448 * @inode: directory inode that is being deleted
449 * @dentry: dentry that is being deleted
450 * @mode: create permissions
451 * @nd: path information
456 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
457 struct nameidata *nd)
460 u32 fid, perm, iounit;
462 struct v9fs_session_info *v9ses;
463 struct v9fs_fid *dfid, *vfid, *ffid;
470 v9ses = v9fs_inode2v9ses(dir);
471 dfid = v9fs_fid_lookup(dentry->d_parent);
472 perm = unixmode2p9mode(v9ses, mode);
474 if (nd && nd->flags & LOOKUP_OPEN)
475 flags = nd->intent.open.flags - 1;
479 err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
480 perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit);
485 vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
492 inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
494 err = PTR_ERR(inode);
499 dentry->d_op = &v9fs_dentry_operations;
500 d_instantiate(dentry, inode);
502 if (nd && nd->flags & LOOKUP_OPEN) {
503 ffid = v9fs_fid_create(v9ses, fid);
507 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
509 v9fs_fid_destroy(ffid);
510 return PTR_ERR(filp);
514 ffid->rdir_fcall = NULL;
516 ffid->iounit = iounit;
518 filp->private_data = ffid;
525 v9fs_fid_destroy(vfid);
534 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
535 * @inode: inode that is being unlinked
536 * @dentry: dentry that is being unlinked
537 * @mode: mode for new directory
541 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
545 struct v9fs_session_info *v9ses;
546 struct v9fs_fid *dfid, *vfid;
551 v9ses = v9fs_inode2v9ses(dir);
552 dfid = v9fs_fid_lookup(dentry->d_parent);
553 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
555 err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
556 perm, V9FS_OREAD, NULL, &fid, NULL, NULL);
559 dprintk(DEBUG_ERROR, "create error %d\n", err);
563 err = v9fs_t_clunk(v9ses, fid);
565 dprintk(DEBUG_ERROR, "clunk error %d\n", err);
569 vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
576 inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
578 err = PTR_ERR(inode);
583 dentry->d_op = &v9fs_dentry_operations;
584 d_instantiate(dentry, inode);
589 v9fs_fid_destroy(vfid);
595 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
596 * @dir: inode that is being walked from
597 * @dentry: dentry that is being walked to?
598 * @nameidata: path data
602 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
603 struct nameidata *nameidata)
605 struct super_block *sb;
606 struct v9fs_session_info *v9ses;
607 struct v9fs_fid *dirfid;
608 struct v9fs_fid *fid;
610 struct v9fs_fcall *fcall = NULL;
615 dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
616 dir, dentry->d_name.name, dentry, nameidata);
619 v9ses = v9fs_inode2v9ses(dir);
620 dentry->d_op = &v9fs_dentry_operations;
621 dirfid = v9fs_fid_lookup(dentry->d_parent);
624 dprintk(DEBUG_ERROR, "no dirfid\n");
625 return ERR_PTR(-EINVAL);
628 dirfidnum = dirfid->fid;
631 dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n",
633 return ERR_PTR(-EBADF);
636 newfid = v9fs_get_idpool(&v9ses->fidpool);
638 eprintk(KERN_WARNING, "newfid fails!\n");
639 return ERR_PTR(-ENOSPC);
642 result = v9fs_t_walk(v9ses, dirfidnum, newfid,
643 (char *)dentry->d_name.name, NULL);
645 v9fs_put_idpool(newfid, &v9ses->fidpool);
646 if (result == -ENOENT) {
649 "Return negative dentry %p count %d\n",
650 dentry, atomic_read(&dentry->d_count));
653 dprintk(DEBUG_ERROR, "walk error:%d\n", result);
657 result = v9fs_t_stat(v9ses, newfid, &fcall);
659 dprintk(DEBUG_ERROR, "stat error\n");
663 inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses,
664 fcall->params.rstat.stat.mode));
666 if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
667 eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
674 inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid);
676 fid = v9fs_fid_create(v9ses, newfid);
678 dprintk(DEBUG_ERROR, "couldn't insert\n");
683 result = v9fs_fid_insert(fid, dentry);
687 fid->qid = fcall->params.rstat.stat.qid;
688 v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
690 d_add(dentry, inode);
697 return ERR_PTR(result);
701 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
702 * @i: inode that is being unlinked
703 * @d: dentry that is being unlinked
707 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
709 return v9fs_remove(i, d, 0);
713 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
714 * @i: inode that is being unlinked
715 * @d: dentry that is being unlinked
719 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
721 return v9fs_remove(i, d, 1);
725 * v9fs_vfs_rename - VFS hook to rename an inode
726 * @old_dir: old dir inode
727 * @old_dentry: old dentry
728 * @new_dir: new dir inode
729 * @new_dentry: new dentry
734 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
735 struct inode *new_dir, struct dentry *new_dentry)
737 struct inode *old_inode = old_dentry->d_inode;
738 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
739 struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
740 struct v9fs_fid *olddirfid =
741 v9fs_fid_lookup(old_dentry->d_parent);
742 struct v9fs_fid *newdirfid =
743 v9fs_fid_lookup(new_dentry->d_parent);
744 struct v9fs_wstat wstat;
745 struct v9fs_fcall *fcall = NULL;
747 int olddirfidnum = -1;
748 int newdirfidnum = -1;
751 dprintk(DEBUG_VFS, "\n");
753 if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
754 dprintk(DEBUG_ERROR, "problem with arguments\n");
758 /* 9P can only handle file rename in the same directory */
759 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
760 dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
766 olddirfidnum = olddirfid->fid;
767 newdirfidnum = newdirfid->fid;
770 dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
776 v9fs_blank_wstat(&wstat);
777 wstat.muid = v9ses->name;
778 wstat.name = (char *) new_dentry->d_name.name;
780 retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall);
784 PRINT_FCALL_ERROR("wstat error", fcall);
791 * v9fs_vfs_getattr - retrieve file metadata
792 * @mnt - mount information
793 * @dentry - file to get attributes on
794 * @stat - metadata structure to populate
799 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
802 struct v9fs_fcall *fcall = NULL;
803 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
804 struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
807 dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
810 "couldn't find fid associated with dentry\n");
814 err = v9fs_t_stat(v9ses, fid->fid, &fcall);
817 dprintk(DEBUG_ERROR, "stat error\n");
819 v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode,
820 dentry->d_inode->i_sb);
821 generic_fillattr(dentry->d_inode, stat);
829 * v9fs_vfs_setattr - set file metadata
830 * @dentry: file whose metadata to set
831 * @iattr: metadata assignment structure
835 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
837 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
838 struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
839 struct v9fs_fcall *fcall = NULL;
840 struct v9fs_wstat wstat;
843 dprintk(DEBUG_VFS, "\n");
847 "Couldn't find fid associated with dentry\n");
851 v9fs_blank_wstat(&wstat);
852 if (iattr->ia_valid & ATTR_MODE)
853 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
855 if (iattr->ia_valid & ATTR_MTIME)
856 wstat.mtime = iattr->ia_mtime.tv_sec;
858 if (iattr->ia_valid & ATTR_ATIME)
859 wstat.atime = iattr->ia_atime.tv_sec;
861 if (iattr->ia_valid & ATTR_SIZE)
862 wstat.length = iattr->ia_size;
864 if (v9ses->extended) {
865 if (iattr->ia_valid & ATTR_UID)
866 wstat.n_uid = iattr->ia_uid;
868 if (iattr->ia_valid & ATTR_GID)
869 wstat.n_gid = iattr->ia_gid;
872 res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall);
875 PRINT_FCALL_ERROR("wstat error", fcall);
879 res = 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 v9fs_stat *stat, struct inode *inode,
894 struct super_block *sb)
898 struct v9fs_session_info *v9ses = sb->s_fs_info;
902 inode->i_atime.tv_sec = stat->atime;
903 inode->i_mtime.tv_sec = stat->mtime;
904 inode->i_ctime.tv_sec = stat->mtime;
906 inode->i_uid = v9ses->uid;
907 inode->i_gid = v9ses->gid;
909 if (v9ses->extended) {
910 inode->i_uid = stat->n_uid;
911 inode->i_gid = stat->n_gid;
914 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
915 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
920 n = stat->extension.len;
921 if (n > sizeof(ext)-1)
923 memmove(ext, stat->extension.str, n);
925 sscanf(ext, "%c %u %u", &type, &major, &minor);
928 inode->i_mode &= ~S_IFBLK;
929 inode->i_mode |= S_IFCHR;
934 dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n",
935 type, stat->extension.len, stat->extension.str);
937 inode->i_rdev = MKDEV(major, minor);
941 inode->i_size = stat->length;
943 inode->i_blksize = sb->s_blocksize;
945 (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits;
949 * v9fs_qid2ino - convert qid into inode number
952 * BUG: potential for inode number collisions?
955 ino_t v9fs_qid2ino(struct v9fs_qid *qid)
957 u64 path = qid->path + 2;
960 if (sizeof(ino_t) == sizeof(path))
961 memcpy(&i, &path, sizeof(ino_t));
963 i = (ino_t) (path ^ (path >> 32));
969 * v9fs_readlink - read a symlink's location (internal version)
970 * @dentry: dentry for symlink
971 * @buffer: buffer to load symlink location into
972 * @buflen: length of buffer
976 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
980 struct v9fs_fcall *fcall = NULL;
981 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
982 struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
985 dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n");
990 if (!v9ses->extended) {
992 dprintk(DEBUG_ERROR, "not extended\n");
996 dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
997 retval = v9fs_t_stat(v9ses, fid->fid, &fcall);
1000 dprintk(DEBUG_ERROR, "stat error\n");
1007 if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) {
1012 /* copy extension buffer into buffer */
1013 if (fcall->params.rstat.stat.extension.len < buflen)
1014 buflen = fcall->params.rstat.stat.extension.len + 1;
1016 memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
1017 buffer[buflen-1] = 0;
1019 dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len,
1020 fcall->params.rstat.stat.extension.str, buffer);
1030 * v9fs_vfs_readlink - read a symlink's location
1031 * @dentry: dentry for symlink
1032 * @buf: buffer to load symlink location into
1033 * @buflen: length of buffer
1037 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
1042 char *link = __getname();
1044 if (buflen > PATH_MAX)
1047 dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
1049 retval = v9fs_readlink(dentry, link, buflen);
1052 if ((ret = copy_to_user(buffer, link, retval)) != 0) {
1053 dprintk(DEBUG_ERROR, "problem copying to user: %d\n",
1064 * v9fs_vfs_follow_link - follow a symlink path
1065 * @dentry: dentry for symlink
1070 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1073 char *link = __getname();
1075 dprintk(DEBUG_VFS, "%s n", dentry->d_name.name);
1078 link = ERR_PTR(-ENOMEM);
1080 len = v9fs_readlink(dentry, link, PATH_MAX);
1084 link = ERR_PTR(len);
1088 nd_set_link(nd, link);
1094 * v9fs_vfs_put_link - release a symlink path
1095 * @dentry: dentry for symlink
1100 static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1102 char *s = nd_get_link(nd);
1104 dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
1109 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1110 int mode, const char *extension)
1114 struct v9fs_session_info *v9ses;
1115 struct v9fs_fid *dfid, *vfid;
1116 struct inode *inode;
1120 v9ses = v9fs_inode2v9ses(dir);
1121 dfid = v9fs_fid_lookup(dentry->d_parent);
1122 perm = unixmode2p9mode(v9ses, mode);
1124 if (!v9ses->extended) {
1125 dprintk(DEBUG_ERROR, "not extended\n");
1129 err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
1130 perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL);
1135 err = v9fs_t_clunk(v9ses, fid);
1139 vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
1141 err = PTR_ERR(vfid);
1146 inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
1147 if (IS_ERR(inode)) {
1148 err = PTR_ERR(inode);
1153 dentry->d_op = &v9fs_dentry_operations;
1154 d_instantiate(dentry, inode);
1159 v9fs_fid_destroy(vfid);
1169 * v9fs_vfs_symlink - helper function to create symlinks
1170 * @dir: directory inode containing symlink
1171 * @dentry: dentry for symlink
1172 * @symname: symlink data
1174 * See 9P2000.u RFC for more information
1179 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1181 dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1184 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1188 * v9fs_vfs_link - create a hardlink
1189 * @old_dentry: dentry for file to link to
1190 * @dir: inode destination for new link
1191 * @dentry: dentry for link
1195 /* XXX - lots of code dup'd from symlink and creates,
1196 * figure out a better reuse strategy
1200 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1201 struct dentry *dentry)
1204 struct v9fs_fid *oldfid;
1207 dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1208 old_dentry->d_name.name);
1210 oldfid = v9fs_fid_lookup(old_dentry);
1212 dprintk(DEBUG_ERROR, "can't find oldfid\n");
1217 sprintf(name, "%d\n", oldfid->fid);
1218 retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
1225 * v9fs_vfs_mknod - create a special file
1226 * @dir: inode destination for new link
1227 * @dentry: dentry for file
1228 * @mode: mode for creation
1229 * @dev_t: device associated with special file
1234 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1239 dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1240 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1242 if (!new_valid_dev(rdev))
1248 /* build extension */
1250 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1251 else if (S_ISCHR(mode))
1252 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1253 else if (S_ISFIFO(mode))
1260 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1266 static struct inode_operations v9fs_dir_inode_operations_ext = {
1267 .create = v9fs_vfs_create,
1268 .lookup = v9fs_vfs_lookup,
1269 .symlink = v9fs_vfs_symlink,
1270 .link = v9fs_vfs_link,
1271 .unlink = v9fs_vfs_unlink,
1272 .mkdir = v9fs_vfs_mkdir,
1273 .rmdir = v9fs_vfs_rmdir,
1274 .mknod = v9fs_vfs_mknod,
1275 .rename = v9fs_vfs_rename,
1276 .readlink = v9fs_vfs_readlink,
1277 .getattr = v9fs_vfs_getattr,
1278 .setattr = v9fs_vfs_setattr,
1281 static struct inode_operations v9fs_dir_inode_operations = {
1282 .create = v9fs_vfs_create,
1283 .lookup = v9fs_vfs_lookup,
1284 .unlink = v9fs_vfs_unlink,
1285 .mkdir = v9fs_vfs_mkdir,
1286 .rmdir = v9fs_vfs_rmdir,
1287 .mknod = v9fs_vfs_mknod,
1288 .rename = v9fs_vfs_rename,
1289 .getattr = v9fs_vfs_getattr,
1290 .setattr = v9fs_vfs_setattr,
1293 static struct inode_operations v9fs_file_inode_operations = {
1294 .getattr = v9fs_vfs_getattr,
1295 .setattr = v9fs_vfs_setattr,
1298 static struct inode_operations v9fs_symlink_inode_operations = {
1299 .readlink = v9fs_vfs_readlink,
1300 .follow_link = v9fs_vfs_follow_link,
1301 .put_link = v9fs_vfs_put_link,
1302 .getattr = v9fs_vfs_getattr,
1303 .setattr = v9fs_vfs_setattr,