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 as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to:
21 * Free Software Foundation
22 * 51 Franklin Street, Fifth Floor
23 * Boston, MA 02111-1301 USA
27 #include <linux/module.h>
28 #include <linux/errno.h>
30 #include <linux/file.h>
31 #include <linux/pagemap.h>
32 #include <linux/stat.h>
33 #include <linux/string.h>
34 #include <linux/smp_lock.h>
35 #include <linux/inet.h>
36 #include <linux/namei.h>
37 #include <linux/idr.h>
45 static struct inode_operations v9fs_dir_inode_operations;
46 static struct inode_operations v9fs_dir_inode_operations_ext;
47 static struct inode_operations v9fs_file_inode_operations;
48 static struct inode_operations v9fs_symlink_inode_operations;
51 * unixmode2p9mode - convert unix mode bits to plan 9
52 * @v9ses: v9fs session information
53 * @mode: mode to convert
57 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
63 if (v9ses->extended) {
65 res |= V9FS_DMSYMLINK;
66 if (v9ses->nodev == 0) {
70 res |= V9FS_DMNAMEDPIPE;
77 if ((mode & S_ISUID) == S_ISUID)
79 if ((mode & S_ISGID) == S_ISGID)
81 if ((mode & V9FS_DMLINK))
89 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
90 * @v9ses: v9fs session information
91 * @mode: mode to convert
95 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
101 if ((mode & V9FS_DMDIR) == V9FS_DMDIR)
103 else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended))
105 else if ((mode & V9FS_DMSOCKET) && (v9ses->extended)
106 && (v9ses->nodev == 0))
108 else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended)
109 && (v9ses->nodev == 0))
111 else if ((mode & V9FS_DMDEVICE) && (v9ses->extended)
112 && (v9ses->nodev == 0))
117 if (v9ses->extended) {
118 if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID)
121 if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID)
128 int v9fs_uflags2omode(int uflags)
151 if (uflags & O_TRUNC)
154 if (uflags & O_APPEND)
161 * v9fs_blank_wstat - helper function to setup a 9P stat structure
162 * @v9ses: 9P session info (for determining extended mode)
163 * @wstat: structure to initialize
168 v9fs_blank_wstat(struct v9fs_wstat *wstat)
172 wstat->qid.type = ~0;
173 wstat->qid.version = ~0;
174 *((long long *)&wstat->qid.path) = ~0;
186 wstat->extension = NULL;
190 * v9fs_get_inode - helper function to setup an inode
192 * @mode: mode to setup inode with
196 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
199 struct v9fs_session_info *v9ses = sb->s_fs_info;
201 dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
203 inode = new_inode(sb);
205 inode->i_mode = mode;
206 inode->i_uid = current->fsuid;
207 inode->i_gid = current->fsgid;
208 inode->i_blksize = sb->s_blocksize;
211 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
212 inode->i_mapping->a_ops = &v9fs_addr_operations;
214 switch (mode & S_IFMT) {
219 if(!v9ses->extended) {
220 dprintk(DEBUG_ERROR, "special files without extended mode\n");
221 return ERR_PTR(-EINVAL);
223 init_special_inode(inode, inode->i_mode,
227 inode->i_op = &v9fs_file_inode_operations;
228 inode->i_fop = &v9fs_file_operations;
231 if(!v9ses->extended) {
232 dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n");
233 return ERR_PTR(-EINVAL);
235 inode->i_op = &v9fs_symlink_inode_operations;
240 inode->i_op = &v9fs_dir_inode_operations_ext;
242 inode->i_op = &v9fs_dir_inode_operations;
243 inode->i_fop = &v9fs_dir_operations;
246 dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
247 mode, mode & S_IFMT);
248 return ERR_PTR(-EINVAL);
251 eprintk(KERN_WARNING, "Problem allocating inode\n");
252 return ERR_PTR(-ENOMEM);
258 v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name,
259 u32 perm, u8 mode, u32 *fidp, struct v9fs_qid *qid, u32 *iounit)
263 struct v9fs_fcall *fcall;
265 fid = v9fs_get_idpool(&v9ses->fidpool);
267 eprintk(KERN_WARNING, "no free fids available\n");
271 err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
273 PRINT_FCALL_ERROR("clone error", fcall);
278 err = v9fs_t_create(v9ses, fid, name, perm, mode, &fcall);
280 PRINT_FCALL_ERROR("create fails", fcall);
285 *iounit = fcall->params.rcreate.iounit;
288 *qid = fcall->params.rcreate.qid;
298 v9fs_put_idpool(fid, &v9ses->fidpool);
304 static struct v9fs_fid*
305 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
309 struct v9fs_fid *ret;
310 struct v9fs_fcall *fcall;
312 nfid = v9fs_get_idpool(&v9ses->fidpool);
314 eprintk(KERN_WARNING, "no free fids available\n");
315 return ERR_PTR(-ENOSPC);
318 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
322 PRINT_FCALL_ERROR("walk error", fcall);
323 v9fs_put_idpool(nfid, &v9ses->fidpool);
329 ret = v9fs_fid_create(v9ses, nfid);
335 err = v9fs_fid_insert(ret, dentry);
337 v9fs_fid_destroy(ret);
344 v9fs_t_clunk(v9ses, nfid);
352 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid,
353 struct super_block *sb)
357 struct v9fs_fcall *fcall;
360 err = v9fs_t_stat(v9ses, fid, &fcall);
362 PRINT_FCALL_ERROR("stat error", fcall);
366 umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode);
367 ret = v9fs_get_inode(sb, umode);
374 v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb);
387 * v9fs_remove - helper function to remove files and directories
388 * @dir: directory inode that is being deleted
389 * @file: dentry that is being deleted
390 * @rmdir: removing a directory
394 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
396 struct v9fs_fcall *fcall = NULL;
397 struct super_block *sb = NULL;
398 struct v9fs_session_info *v9ses = NULL;
399 struct v9fs_fid *v9fid = NULL;
400 struct inode *file_inode = NULL;
404 dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
407 file_inode = file->d_inode;
408 sb = file_inode->i_sb;
409 v9ses = v9fs_inode2v9ses(file_inode);
410 v9fid = v9fs_fid_lookup(file);
420 dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n",
425 result = v9fs_t_remove(v9ses, fid, &fcall);
427 PRINT_FCALL_ERROR("remove fails", fcall);
429 v9fs_put_idpool(fid, &v9ses->fidpool);
430 v9fs_fid_destroy(v9fid);
438 v9fs_open_created(struct inode *inode, struct file *file)
444 * v9fs_vfs_create - VFS hook to create files
445 * @inode: directory inode that is being deleted
446 * @dentry: dentry that is being deleted
447 * @mode: create permissions
448 * @nd: path information
453 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
454 struct nameidata *nd)
457 u32 fid, perm, iounit;
459 struct v9fs_session_info *v9ses;
460 struct v9fs_fid *dfid, *vfid, *ffid;
467 v9ses = v9fs_inode2v9ses(dir);
468 dfid = v9fs_fid_lookup(dentry->d_parent);
469 perm = unixmode2p9mode(v9ses, mode);
471 if (nd && nd->flags & LOOKUP_OPEN)
472 flags = nd->intent.open.flags - 1;
476 err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
477 perm, v9fs_uflags2omode(flags), &fid, &qid, &iounit);
482 vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
489 inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
491 err = PTR_ERR(inode);
496 dentry->d_op = &v9fs_dentry_operations;
497 d_instantiate(dentry, inode);
499 if (nd && nd->flags & LOOKUP_OPEN) {
500 ffid = v9fs_fid_create(v9ses, fid);
504 filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
506 v9fs_fid_destroy(ffid);
507 return PTR_ERR(filp);
511 ffid->rdir_fcall = NULL;
513 ffid->iounit = iounit;
515 filp->private_data = ffid;
522 v9fs_fid_destroy(vfid);
531 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
532 * @inode: inode that is being unlinked
533 * @dentry: dentry that is being unlinked
534 * @mode: mode for new directory
538 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
542 struct v9fs_session_info *v9ses;
543 struct v9fs_fid *dfid, *vfid;
548 v9ses = v9fs_inode2v9ses(dir);
549 dfid = v9fs_fid_lookup(dentry->d_parent);
550 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
552 err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
553 perm, V9FS_OREAD, &fid, NULL, NULL);
556 dprintk(DEBUG_ERROR, "create error %d\n", err);
560 err = v9fs_t_clunk(v9ses, fid);
562 dprintk(DEBUG_ERROR, "clunk error %d\n", err);
566 vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
573 inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
575 err = PTR_ERR(inode);
580 dentry->d_op = &v9fs_dentry_operations;
581 d_instantiate(dentry, inode);
586 v9fs_fid_destroy(vfid);
592 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
593 * @dir: inode that is being walked from
594 * @dentry: dentry that is being walked to?
595 * @nameidata: path data
599 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
600 struct nameidata *nameidata)
602 struct super_block *sb;
603 struct v9fs_session_info *v9ses;
604 struct v9fs_fid *dirfid;
605 struct v9fs_fid *fid;
607 struct v9fs_fcall *fcall = NULL;
612 dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
613 dir, dentry->d_name.name, dentry, nameidata);
616 v9ses = v9fs_inode2v9ses(dir);
617 dirfid = v9fs_fid_lookup(dentry->d_parent);
620 dprintk(DEBUG_ERROR, "no dirfid\n");
621 return ERR_PTR(-EINVAL);
624 dirfidnum = dirfid->fid;
627 dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n",
629 return ERR_PTR(-EBADF);
632 newfid = v9fs_get_idpool(&v9ses->fidpool);
634 eprintk(KERN_WARNING, "newfid fails!\n");
635 return ERR_PTR(-ENOSPC);
638 result = v9fs_t_walk(v9ses, dirfidnum, newfid,
639 (char *)dentry->d_name.name, NULL);
641 v9fs_put_idpool(newfid, &v9ses->fidpool);
642 if (result == -ENOENT) {
645 "Return negative dentry %p count %d\n",
646 dentry, atomic_read(&dentry->d_count));
649 dprintk(DEBUG_ERROR, "walk error:%d\n", result);
653 result = v9fs_t_stat(v9ses, newfid, &fcall);
655 dprintk(DEBUG_ERROR, "stat error\n");
659 inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses,
660 fcall->params.rstat.stat.mode));
662 if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
663 eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
670 inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid);
672 fid = v9fs_fid_create(v9ses, newfid);
674 dprintk(DEBUG_ERROR, "couldn't insert\n");
679 result = v9fs_fid_insert(fid, dentry);
683 fid->qid = fcall->params.rstat.stat.qid;
685 dentry->d_op = &v9fs_dentry_operations;
686 v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
688 d_add(dentry, inode);
695 return ERR_PTR(result);
699 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
700 * @i: inode that is being unlinked
701 * @d: dentry that is being unlinked
705 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
707 return v9fs_remove(i, d, 0);
711 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
712 * @i: inode that is being unlinked
713 * @d: dentry that is being unlinked
717 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
719 return v9fs_remove(i, d, 1);
723 * v9fs_vfs_rename - VFS hook to rename an inode
724 * @old_dir: old dir inode
725 * @old_dentry: old dentry
726 * @new_dir: new dir inode
727 * @new_dentry: new dentry
732 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
733 struct inode *new_dir, struct dentry *new_dentry)
735 struct inode *old_inode = old_dentry->d_inode;
736 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
737 struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
738 struct v9fs_fid *olddirfid =
739 v9fs_fid_lookup(old_dentry->d_parent);
740 struct v9fs_fid *newdirfid =
741 v9fs_fid_lookup(new_dentry->d_parent);
742 struct v9fs_wstat wstat;
743 struct v9fs_fcall *fcall = NULL;
745 int olddirfidnum = -1;
746 int newdirfidnum = -1;
749 dprintk(DEBUG_VFS, "\n");
751 if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
752 dprintk(DEBUG_ERROR, "problem with arguments\n");
756 /* 9P can only handle file rename in the same directory */
757 if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
758 dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
764 olddirfidnum = olddirfid->fid;
765 newdirfidnum = newdirfid->fid;
768 dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
774 v9fs_blank_wstat(&wstat);
775 wstat.muid = v9ses->name;
776 wstat.name = (char *) new_dentry->d_name.name;
778 retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall);
782 PRINT_FCALL_ERROR("wstat error", fcall);
789 * v9fs_vfs_getattr - retrieve file metadata
790 * @mnt - mount information
791 * @dentry - file to get attributes on
792 * @stat - metadata structure to populate
797 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
800 struct v9fs_fcall *fcall = NULL;
801 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
802 struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
805 dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
808 "couldn't find fid associated with dentry\n");
812 err = v9fs_t_stat(v9ses, fid->fid, &fcall);
815 dprintk(DEBUG_ERROR, "stat error\n");
817 v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode,
818 dentry->d_inode->i_sb);
819 generic_fillattr(dentry->d_inode, stat);
827 * v9fs_vfs_setattr - set file metadata
828 * @dentry: file whose metadata to set
829 * @iattr: metadata assignment structure
833 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
835 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
836 struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
837 struct v9fs_fcall *fcall = NULL;
838 struct v9fs_wstat wstat;
841 dprintk(DEBUG_VFS, "\n");
845 "Couldn't find fid associated with dentry\n");
849 v9fs_blank_wstat(&wstat);
850 if (iattr->ia_valid & ATTR_MODE)
851 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
853 if (iattr->ia_valid & ATTR_MTIME)
854 wstat.mtime = iattr->ia_mtime.tv_sec;
856 if (iattr->ia_valid & ATTR_ATIME)
857 wstat.atime = iattr->ia_atime.tv_sec;
859 if (iattr->ia_valid & ATTR_SIZE)
860 wstat.length = iattr->ia_size;
862 if (v9ses->extended) {
863 if (iattr->ia_valid & ATTR_UID)
864 wstat.n_uid = iattr->ia_uid;
866 if (iattr->ia_valid & ATTR_GID)
867 wstat.n_gid = iattr->ia_gid;
870 res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall);
873 PRINT_FCALL_ERROR("wstat error", fcall);
877 res = inode_setattr(dentry->d_inode, iattr);
883 * v9fs_stat2inode - populate an inode structure with mistat info
884 * @stat: Plan 9 metadata (mistat) structure
885 * @inode: inode to populate
886 * @sb: superblock of filesystem
891 v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
892 struct super_block *sb)
896 struct v9fs_session_info *v9ses = sb->s_fs_info;
900 inode->i_atime.tv_sec = stat->atime;
901 inode->i_mtime.tv_sec = stat->mtime;
902 inode->i_ctime.tv_sec = stat->mtime;
904 inode->i_uid = v9ses->uid;
905 inode->i_gid = v9ses->gid;
907 if (v9ses->extended) {
908 inode->i_uid = stat->n_uid;
909 inode->i_gid = stat->n_gid;
912 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
913 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
918 n = stat->extension.len;
919 if (n > sizeof(ext)-1)
921 memmove(ext, stat->extension.str, n);
923 sscanf(ext, "%c %u %u", &type, &major, &minor);
926 inode->i_mode &= ~S_IFBLK;
927 inode->i_mode |= S_IFCHR;
932 dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n",
933 type, stat->extension.len, stat->extension.str);
935 inode->i_rdev = MKDEV(major, minor);
939 inode->i_size = stat->length;
941 inode->i_blksize = sb->s_blocksize;
943 (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits;
947 * v9fs_qid2ino - convert qid into inode number
950 * BUG: potential for inode number collisions?
953 ino_t v9fs_qid2ino(struct v9fs_qid *qid)
955 u64 path = qid->path + 2;
958 if (sizeof(ino_t) == sizeof(path))
959 memcpy(&i, &path, sizeof(ino_t));
961 i = (ino_t) (path ^ (path >> 32));
967 * v9fs_readlink - read a symlink's location (internal version)
968 * @dentry: dentry for symlink
969 * @buffer: buffer to load symlink location into
970 * @buflen: length of buffer
974 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
978 struct v9fs_fcall *fcall = NULL;
979 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
980 struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
983 dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n");
988 if (!v9ses->extended) {
990 dprintk(DEBUG_ERROR, "not extended\n");
994 dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
995 retval = v9fs_t_stat(v9ses, fid->fid, &fcall);
998 dprintk(DEBUG_ERROR, "stat error\n");
1005 if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) {
1010 /* copy extension buffer into buffer */
1011 if (fcall->params.rstat.stat.extension.len < buflen)
1012 buflen = fcall->params.rstat.stat.extension.len;
1014 memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
1015 buffer[buflen-1] = 0;
1026 * v9fs_vfs_readlink - read a symlink's location
1027 * @dentry: dentry for symlink
1028 * @buf: buffer to load symlink location into
1029 * @buflen: length of buffer
1033 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
1038 char *link = __getname();
1040 if (buflen > PATH_MAX)
1043 dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
1045 retval = v9fs_readlink(dentry, link, buflen);
1048 if ((ret = copy_to_user(buffer, link, retval)) != 0) {
1049 dprintk(DEBUG_ERROR, "problem copying to user: %d\n",
1060 * v9fs_vfs_follow_link - follow a symlink path
1061 * @dentry: dentry for symlink
1066 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1069 char *link = __getname();
1071 dprintk(DEBUG_VFS, "%s n", dentry->d_name.name);
1074 link = ERR_PTR(-ENOMEM);
1076 len = v9fs_readlink(dentry, link, strlen(link));
1080 link = ERR_PTR(len);
1084 nd_set_link(nd, link);
1090 * v9fs_vfs_put_link - release a symlink path
1091 * @dentry: dentry for symlink
1096 static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1098 char *s = nd_get_link(nd);
1100 dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
1105 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1106 int mode, const char *extension)
1110 struct v9fs_session_info *v9ses;
1111 struct v9fs_fid *dfid, *vfid;
1112 struct inode *inode;
1113 struct v9fs_fcall *fcall;
1114 struct v9fs_wstat wstat;
1119 v9ses = v9fs_inode2v9ses(dir);
1120 dfid = v9fs_fid_lookup(dentry->d_parent);
1121 perm = unixmode2p9mode(v9ses, mode);
1123 if (!v9ses->extended) {
1124 dprintk(DEBUG_ERROR, "not extended\n");
1128 err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
1129 perm, V9FS_OREAD, &fid, NULL, NULL);
1134 err = v9fs_t_clunk(v9ses, fid);
1138 vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
1140 err = PTR_ERR(vfid);
1145 inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
1146 if (IS_ERR(inode)) {
1147 err = PTR_ERR(inode);
1152 /* issue a Twstat */
1153 v9fs_blank_wstat(&wstat);
1154 wstat.muid = v9ses->name;
1155 wstat.extension = (char *) extension;
1156 err = v9fs_t_wstat(v9ses, vfid->fid, &wstat, &fcall);
1158 PRINT_FCALL_ERROR("wstat error", fcall);
1163 dentry->d_op = &v9fs_dentry_operations;
1164 d_instantiate(dentry, inode);
1170 v9fs_fid_destroy(vfid);
1180 * v9fs_vfs_symlink - helper function to create symlinks
1181 * @dir: directory inode containing symlink
1182 * @dentry: dentry for symlink
1183 * @symname: symlink data
1185 * See 9P2000.u RFC for more information
1190 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1192 dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1195 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1199 * v9fs_vfs_link - create a hardlink
1200 * @old_dentry: dentry for file to link to
1201 * @dir: inode destination for new link
1202 * @dentry: dentry for link
1206 /* XXX - lots of code dup'd from symlink and creates,
1207 * figure out a better reuse strategy
1211 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1212 struct dentry *dentry)
1215 struct v9fs_fid *oldfid;
1218 dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1219 old_dentry->d_name.name);
1221 oldfid = v9fs_fid_lookup(old_dentry);
1223 dprintk(DEBUG_ERROR, "can't find oldfid\n");
1228 sprintf(name, "hardlink(%d)\n", oldfid->fid);
1229 retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
1236 * v9fs_vfs_mknod - create a special file
1237 * @dir: inode destination for new link
1238 * @dentry: dentry for file
1239 * @mode: mode for creation
1240 * @dev_t: device associated with special file
1245 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1250 dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1251 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1253 if (!new_valid_dev(rdev))
1257 /* build extension */
1259 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1260 else if (S_ISCHR(mode))
1261 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1262 else if (S_ISFIFO(mode))
1269 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1275 static struct inode_operations v9fs_dir_inode_operations_ext = {
1276 .create = v9fs_vfs_create,
1277 .lookup = v9fs_vfs_lookup,
1278 .symlink = v9fs_vfs_symlink,
1279 .link = v9fs_vfs_link,
1280 .unlink = v9fs_vfs_unlink,
1281 .mkdir = v9fs_vfs_mkdir,
1282 .rmdir = v9fs_vfs_rmdir,
1283 .mknod = v9fs_vfs_mknod,
1284 .rename = v9fs_vfs_rename,
1285 .readlink = v9fs_vfs_readlink,
1286 .getattr = v9fs_vfs_getattr,
1287 .setattr = v9fs_vfs_setattr,
1290 static struct inode_operations v9fs_dir_inode_operations = {
1291 .create = v9fs_vfs_create,
1292 .lookup = v9fs_vfs_lookup,
1293 .unlink = v9fs_vfs_unlink,
1294 .mkdir = v9fs_vfs_mkdir,
1295 .rmdir = v9fs_vfs_rmdir,
1296 .mknod = v9fs_vfs_mknod,
1297 .rename = v9fs_vfs_rename,
1298 .getattr = v9fs_vfs_getattr,
1299 .setattr = v9fs_vfs_setattr,
1302 static struct inode_operations v9fs_file_inode_operations = {
1303 .getattr = v9fs_vfs_getattr,
1304 .setattr = v9fs_vfs_setattr,
1307 static struct inode_operations v9fs_symlink_inode_operations = {
1308 .readlink = v9fs_vfs_readlink,
1309 .follow_link = v9fs_vfs_follow_link,
1310 .put_link = v9fs_vfs_put_link,
1311 .getattr = v9fs_vfs_getattr,
1312 .setattr = v9fs_vfs_setattr,