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 <linux/xattr.h>
39 #include <linux/posix_acl.h>
40 #include <net/9p/9p.h>
41 #include <net/9p/client.h>
50 static const struct inode_operations v9fs_dir_inode_operations;
51 static const struct inode_operations v9fs_dir_inode_operations_dotu;
52 static const struct inode_operations v9fs_dir_inode_operations_dotl;
53 static const struct inode_operations v9fs_file_inode_operations;
54 static const struct inode_operations v9fs_file_inode_operations_dotl;
55 static const struct inode_operations v9fs_symlink_inode_operations;
56 static const struct inode_operations v9fs_symlink_inode_operations_dotl;
59 v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
63 * unixmode2p9mode - convert unix mode bits to plan 9
64 * @v9ses: v9fs session information
65 * @mode: mode to convert
69 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
75 if (v9fs_proto_dotu(v9ses)) {
78 if (v9ses->nodev == 0) {
82 res |= P9_DMNAMEDPIPE;
89 if ((mode & S_ISUID) == S_ISUID)
91 if ((mode & S_ISGID) == S_ISGID)
93 if ((mode & S_ISVTX) == S_ISVTX)
95 if ((mode & P9_DMLINK))
103 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
104 * @v9ses: v9fs session information
105 * @mode: mode to convert
109 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
115 if ((mode & P9_DMDIR) == P9_DMDIR)
117 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
119 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
120 && (v9ses->nodev == 0))
122 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
123 && (v9ses->nodev == 0))
125 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
126 && (v9ses->nodev == 0))
131 if (v9fs_proto_dotu(v9ses)) {
132 if ((mode & P9_DMSETUID) == P9_DMSETUID)
135 if ((mode & P9_DMSETGID) == P9_DMSETGID)
138 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
146 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
147 * @uflags: flags to convert
148 * @extended: if .u extensions are active
151 int v9fs_uflags2omode(int uflags, int extended)
171 if (uflags & O_TRUNC)
178 if (uflags & O_APPEND)
186 * v9fs_blank_wstat - helper function to setup a 9P stat structure
187 * @wstat: structure to initialize
192 v9fs_blank_wstat(struct p9_wstat *wstat)
196 wstat->qid.type = ~0;
197 wstat->qid.version = ~0;
198 *((long long *)&wstat->qid.path) = ~0;
210 wstat->extension = NULL;
213 #ifdef CONFIG_9P_FSCACHE
215 * v9fs_alloc_inode - helper function to allocate an inode
216 * This callback is executed before setting up the inode so that we
217 * can associate a vcookie with each inode.
221 struct inode *v9fs_alloc_inode(struct super_block *sb)
223 struct v9fs_cookie *vcookie;
224 vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache,
229 vcookie->fscache = NULL;
231 spin_lock_init(&vcookie->lock);
232 return &vcookie->inode;
236 * v9fs_destroy_inode - destroy an inode
240 static void v9fs_i_callback(struct rcu_head *head)
242 struct inode *inode = container_of(head, struct inode, i_rcu);
243 INIT_LIST_HEAD(&inode->i_dentry);
244 kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
247 void v9fs_destroy_inode(struct inode *inode)
249 call_rcu(&inode->i_rcu, v9fs_i_callback);
254 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
255 * new file system object. This checks the S_ISGID to determine the owning
256 * group of the new file system object.
259 static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
261 BUG_ON(dir_inode == NULL);
263 if (dir_inode->i_mode & S_ISGID) {
264 /* set_gid bit is set.*/
265 return dir_inode->i_gid;
267 return current_fsgid();
271 * v9fs_dentry_from_dir_inode - helper function to get the dentry from
276 static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
278 struct dentry *dentry;
280 spin_lock(&inode->i_lock);
281 /* Directory should have only one entry. */
282 BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
283 dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
284 spin_unlock(&inode->i_lock);
289 * v9fs_get_inode - helper function to setup an inode
291 * @mode: mode to setup inode with
295 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
299 struct v9fs_session_info *v9ses = sb->s_fs_info;
301 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
303 inode = new_inode(sb);
305 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
306 return ERR_PTR(-ENOMEM);
309 inode_init_owner(inode, NULL, mode);
312 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
313 inode->i_mapping->a_ops = &v9fs_addr_operations;
315 switch (mode & S_IFMT) {
320 if (v9fs_proto_dotl(v9ses)) {
321 inode->i_op = &v9fs_file_inode_operations_dotl;
322 inode->i_fop = &v9fs_file_operations_dotl;
323 } else if (v9fs_proto_dotu(v9ses)) {
324 inode->i_op = &v9fs_file_inode_operations;
325 inode->i_fop = &v9fs_file_operations;
327 P9_DPRINTK(P9_DEBUG_ERROR,
328 "special files without extended mode\n");
332 init_special_inode(inode, inode->i_mode, inode->i_rdev);
335 if (v9fs_proto_dotl(v9ses)) {
336 inode->i_op = &v9fs_file_inode_operations_dotl;
337 inode->i_fop = &v9fs_file_operations_dotl;
339 inode->i_op = &v9fs_file_inode_operations;
340 inode->i_fop = &v9fs_file_operations;
346 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
347 P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
348 "legacy protocol.\n");
353 if (v9fs_proto_dotl(v9ses))
354 inode->i_op = &v9fs_symlink_inode_operations_dotl;
356 inode->i_op = &v9fs_symlink_inode_operations;
361 if (v9fs_proto_dotl(v9ses))
362 inode->i_op = &v9fs_dir_inode_operations_dotl;
363 else if (v9fs_proto_dotu(v9ses))
364 inode->i_op = &v9fs_dir_inode_operations_dotu;
366 inode->i_op = &v9fs_dir_inode_operations;
368 if (v9fs_proto_dotl(v9ses))
369 inode->i_fop = &v9fs_dir_operations_dotl;
371 inode->i_fop = &v9fs_dir_operations;
375 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
376 mode, mode & S_IFMT);
389 static struct v9fs_fid*
390 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
394 struct v9fs_fid *ret;
395 struct v9fs_fcall *fcall;
397 nfid = v9fs_get_idpool(&v9ses->fidpool);
399 eprintk(KERN_WARNING, "no free fids available\n");
400 return ERR_PTR(-ENOSPC);
403 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
407 if (fcall && fcall->id == RWALK)
410 PRINT_FCALL_ERROR("walk error", fcall);
411 v9fs_put_idpool(nfid, &v9ses->fidpool);
417 ret = v9fs_fid_create(v9ses, nfid);
423 err = v9fs_fid_insert(ret, dentry);
425 v9fs_fid_destroy(ret);
432 v9fs_t_clunk(v9ses, nfid);
442 * v9fs_clear_inode - release an inode
443 * @inode: inode to release
446 void v9fs_evict_inode(struct inode *inode)
448 truncate_inode_pages(inode->i_mapping, 0);
449 end_writeback(inode);
450 filemap_fdatawrite(inode->i_mapping);
452 #ifdef CONFIG_9P_FSCACHE
453 v9fs_cache_inode_put_cookie(inode);
457 static struct inode *
458 v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid,
459 struct super_block *sb)
462 struct inode *ret = NULL;
465 st = p9_client_stat(fid);
469 umode = p9mode2unixmode(v9ses, st->mode);
470 ret = v9fs_get_inode(sb, umode);
476 v9fs_stat2inode(st, ret, sb);
477 ret->i_ino = v9fs_qid2ino(&st->qid);
479 #ifdef CONFIG_9P_FSCACHE
480 v9fs_vcookie_set_qid(ret, &st->qid);
481 v9fs_cache_inode_get_cookie(ret);
492 static struct inode *
493 v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
494 struct super_block *sb)
496 struct inode *ret = NULL;
498 struct p9_stat_dotl *st;
500 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
504 ret = v9fs_get_inode(sb, st->st_mode);
510 v9fs_stat2inode_dotl(st, ret);
511 ret->i_ino = v9fs_qid2ino(&st->qid);
512 #ifdef CONFIG_9P_FSCACHE
513 v9fs_vcookie_set_qid(ret, &st->qid);
514 v9fs_cache_inode_get_cookie(ret);
516 err = v9fs_get_acl(ret, fid);
529 * v9fs_inode_from_fid - Helper routine to populate an inode by
530 * issuing a attribute request
531 * @v9ses: session information
532 * @fid: fid to issue attribute request for
533 * @sb: superblock on which to create inode
536 static inline struct inode *
537 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
538 struct super_block *sb)
540 if (v9fs_proto_dotl(v9ses))
541 return v9fs_inode_dotl(v9ses, fid, sb);
543 return v9fs_inode(v9ses, fid, sb);
547 * v9fs_remove - helper function to remove files and directories
548 * @dir: directory inode that is being deleted
549 * @file: dentry that is being deleted
550 * @rmdir: removing a directory
554 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
557 struct inode *file_inode;
558 struct p9_fid *v9fid;
560 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
563 file_inode = file->d_inode;
564 v9fid = v9fs_fid_clone(file);
566 return PTR_ERR(v9fid);
568 retval = p9_client_remove(v9fid);
570 drop_nlink(file_inode);
575 * v9fs_create - Create a file
576 * @v9ses: session information
577 * @dir: directory that dentry is being created in
578 * @dentry: dentry that is being created
579 * @extension: 9p2000.u extension string to support devices, etc.
580 * @perm: create permissions
584 static struct p9_fid *
585 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
586 struct dentry *dentry, char *extension, u32 perm, u8 mode)
590 struct p9_fid *dfid, *ofid, *fid;
593 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
598 name = (char *) dentry->d_name.name;
599 dfid = v9fs_fid_lookup(dentry->d_parent);
602 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
606 /* clone a fid to use for creation */
607 ofid = p9_client_walk(dfid, 0, NULL, 1);
610 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
614 err = p9_client_fcreate(ofid, name, perm, mode, extension);
616 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
620 /* now walk from the parent so we can get unopened fid */
621 fid = p9_client_walk(dfid, 1, &name, 1);
624 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
629 /* instantiate inode and assign the unopened fid to the dentry */
630 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
632 err = PTR_ERR(inode);
633 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
638 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
640 d_set_d_op(dentry, &v9fs_dentry_operations);
642 d_instantiate(dentry, inode);
643 err = v9fs_fid_add(dentry, fid);
651 p9_client_clunk(ofid);
654 p9_client_clunk(fid);
660 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
661 * @dir: directory inode that is being created
662 * @dentry: dentry that is being deleted
663 * @mode: create permissions
664 * @nd: path information
669 v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
670 struct nameidata *nd)
677 struct v9fs_session_info *v9ses;
678 struct p9_fid *fid = NULL;
679 struct p9_fid *dfid, *ofid;
683 struct posix_acl *pacl = NULL, *dacl = NULL;
685 v9ses = v9fs_inode2v9ses(dir);
686 if (nd && nd->flags & LOOKUP_OPEN)
687 flags = nd->intent.open.flags - 1;
690 * create call without LOOKUP_OPEN is due
691 * to mknod of regular files. So use mknod
694 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
697 name = (char *) dentry->d_name.name;
698 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
699 "mode:0x%x\n", name, flags, omode);
701 dfid = v9fs_fid_lookup(dentry->d_parent);
704 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
708 /* clone a fid to use for creation */
709 ofid = p9_client_walk(dfid, 0, NULL, 1);
712 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
716 gid = v9fs_get_fsgid_for_create(dir);
719 /* Update mode based on ACL value */
720 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
722 P9_DPRINTK(P9_DEBUG_VFS,
723 "Failed to get acl values in creat %d\n", err);
726 err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
728 P9_DPRINTK(P9_DEBUG_VFS,
729 "p9_client_open_dotl failed in creat %d\n",
733 /* instantiate inode and assign the unopened fid to the dentry */
734 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE ||
735 (nd && nd->flags & LOOKUP_OPEN)) {
736 fid = p9_client_walk(dfid, 1, &name, 1);
739 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
745 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
747 err = PTR_ERR(inode);
748 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
752 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
753 d_instantiate(dentry, inode);
754 err = v9fs_fid_add(dentry, fid);
757 /* The fid would get clunked via a dput */
761 * Not in cached mode. No need to populate
762 * inode with stat. We need to get an inode
763 * so that we can set the acl with dentry
765 inode = v9fs_get_inode(dir->i_sb, mode);
767 err = PTR_ERR(inode);
770 d_set_d_op(dentry, &v9fs_dentry_operations);
771 d_instantiate(dentry, inode);
773 /* Now set the ACL based on the default value */
774 v9fs_set_create_acl(dentry, dacl, pacl);
776 /* if we are opening a file, assign the open fid to the file */
777 if (nd && nd->flags & LOOKUP_OPEN) {
778 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
780 p9_client_clunk(ofid);
781 return PTR_ERR(filp);
783 filp->private_data = ofid;
785 p9_client_clunk(ofid);
791 p9_client_clunk(ofid);
793 p9_client_clunk(fid);
798 * v9fs_vfs_create - VFS hook to create files
799 * @dir: directory inode that is being created
800 * @dentry: dentry that is being deleted
801 * @mode: create permissions
802 * @nd: path information
807 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
808 struct nameidata *nd)
813 struct v9fs_session_info *v9ses;
819 v9ses = v9fs_inode2v9ses(dir);
820 perm = unixmode2p9mode(v9ses, mode);
821 if (nd && nd->flags & LOOKUP_OPEN)
822 flags = nd->intent.open.flags - 1;
826 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
827 v9fs_uflags2omode(flags,
828 v9fs_proto_dotu(v9ses)));
835 /* if we are opening a file, assign the open fid to the file */
836 if (nd && nd->flags & LOOKUP_OPEN) {
837 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
843 filp->private_data = fid;
845 p9_client_clunk(fid);
851 p9_client_clunk(fid);
857 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
858 * @dir: inode that is being unlinked
859 * @dentry: dentry that is being unlinked
860 * @mode: mode for new directory
864 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
868 struct v9fs_session_info *v9ses;
871 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
873 v9ses = v9fs_inode2v9ses(dir);
874 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
875 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
882 p9_client_clunk(fid);
889 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
890 * @dir: inode that is being unlinked
891 * @dentry: dentry that is being unlinked
892 * @mode: mode for new directory
896 static int v9fs_vfs_mkdir_dotl(struct inode *dir,
897 struct dentry *dentry, int omode)
900 struct v9fs_session_info *v9ses;
901 struct p9_fid *fid = NULL, *dfid = NULL;
907 struct dentry *dir_dentry;
908 struct posix_acl *dacl = NULL, *pacl = NULL;
910 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
912 v9ses = v9fs_inode2v9ses(dir);
915 if (dir->i_mode & S_ISGID)
918 dir_dentry = v9fs_dentry_from_dir_inode(dir);
919 dfid = v9fs_fid_lookup(dir_dentry);
922 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
927 gid = v9fs_get_fsgid_for_create(dir);
929 /* Update mode based on ACL value */
930 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
932 P9_DPRINTK(P9_DEBUG_VFS,
933 "Failed to get acl values in mkdir %d\n", err);
936 name = (char *) dentry->d_name.name;
937 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
941 /* instantiate inode and assign the unopened fid to the dentry */
942 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
943 fid = p9_client_walk(dfid, 1, &name, 1);
946 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
952 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
954 err = PTR_ERR(inode);
955 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
959 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
960 d_instantiate(dentry, inode);
961 err = v9fs_fid_add(dentry, fid);
967 * Not in cached mode. No need to populate
968 * inode with stat. We need to get an inode
969 * so that we can set the acl with dentry
971 inode = v9fs_get_inode(dir->i_sb, mode);
973 err = PTR_ERR(inode);
976 d_set_d_op(dentry, &v9fs_dentry_operations);
977 d_instantiate(dentry, inode);
979 /* Now set the ACL based on the default value */
980 v9fs_set_create_acl(dentry, dacl, pacl);
984 p9_client_clunk(fid);
989 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
990 * @dir: inode that is being walked from
991 * @dentry: dentry that is being walked to?
992 * @nameidata: path data
996 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
997 struct nameidata *nameidata)
999 struct super_block *sb;
1000 struct v9fs_session_info *v9ses;
1001 struct p9_fid *dfid, *fid;
1002 struct inode *inode;
1006 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
1007 dir, dentry->d_name.name, dentry, nameidata);
1009 if (dentry->d_name.len > NAME_MAX)
1010 return ERR_PTR(-ENAMETOOLONG);
1013 v9ses = v9fs_inode2v9ses(dir);
1014 /* We can walk d_parent because we hold the dir->i_mutex */
1015 dfid = v9fs_fid_lookup(dentry->d_parent);
1017 return ERR_CAST(dfid);
1019 name = (char *) dentry->d_name.name;
1020 fid = p9_client_walk(dfid, 1, &name, 1);
1022 result = PTR_ERR(fid);
1023 if (result == -ENOENT) {
1028 return ERR_PTR(result);
1031 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1032 if (IS_ERR(inode)) {
1033 result = PTR_ERR(inode);
1038 result = v9fs_fid_add(dentry, fid);
1044 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
1046 d_set_d_op(dentry, &v9fs_dentry_operations);
1048 d_add(dentry, inode);
1054 p9_client_clunk(fid);
1056 return ERR_PTR(result);
1060 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
1061 * @i: inode that is being unlinked
1062 * @d: dentry that is being unlinked
1066 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
1068 return v9fs_remove(i, d, 0);
1072 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
1073 * @i: inode that is being unlinked
1074 * @d: dentry that is being unlinked
1078 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
1080 return v9fs_remove(i, d, 1);
1084 * v9fs_vfs_rename - VFS hook to rename an inode
1085 * @old_dir: old dir inode
1086 * @old_dentry: old dentry
1087 * @new_dir: new dir inode
1088 * @new_dentry: new dentry
1093 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
1094 struct inode *new_dir, struct dentry *new_dentry)
1096 struct inode *old_inode;
1097 struct v9fs_session_info *v9ses;
1098 struct p9_fid *oldfid;
1099 struct p9_fid *olddirfid;
1100 struct p9_fid *newdirfid;
1101 struct p9_wstat wstat;
1104 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1106 old_inode = old_dentry->d_inode;
1107 v9ses = v9fs_inode2v9ses(old_inode);
1108 oldfid = v9fs_fid_lookup(old_dentry);
1110 return PTR_ERR(oldfid);
1112 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
1113 if (IS_ERR(olddirfid)) {
1114 retval = PTR_ERR(olddirfid);
1118 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
1119 if (IS_ERR(newdirfid)) {
1120 retval = PTR_ERR(newdirfid);
1124 down_write(&v9ses->rename_sem);
1125 if (v9fs_proto_dotl(v9ses)) {
1126 retval = p9_client_rename(oldfid, newdirfid,
1127 (char *) new_dentry->d_name.name);
1128 if (retval != -ENOSYS)
1131 if (old_dentry->d_parent != new_dentry->d_parent) {
1133 * 9P .u can only handle file rename in the same directory
1136 P9_DPRINTK(P9_DEBUG_ERROR,
1137 "old dir and new dir are different\n");
1141 v9fs_blank_wstat(&wstat);
1142 wstat.muid = v9ses->uname;
1143 wstat.name = (char *) new_dentry->d_name.name;
1144 retval = p9_client_wstat(oldfid, &wstat);
1148 /* successful rename */
1149 d_move(old_dentry, new_dentry);
1150 up_write(&v9ses->rename_sem);
1151 p9_client_clunk(newdirfid);
1154 p9_client_clunk(olddirfid);
1161 * v9fs_vfs_getattr - retrieve file metadata
1162 * @mnt: mount information
1163 * @dentry: file to get attributes on
1164 * @stat: metadata structure to populate
1169 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1173 struct v9fs_session_info *v9ses;
1175 struct p9_wstat *st;
1177 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
1179 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1180 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
1181 return simple_getattr(mnt, dentry, stat);
1183 fid = v9fs_fid_lookup(dentry);
1185 return PTR_ERR(fid);
1187 st = p9_client_stat(fid);
1191 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
1192 generic_fillattr(dentry->d_inode, stat);
1200 v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
1204 struct v9fs_session_info *v9ses;
1206 struct p9_stat_dotl *st;
1208 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
1210 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1211 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
1212 return simple_getattr(mnt, dentry, stat);
1214 fid = v9fs_fid_lookup(dentry);
1216 return PTR_ERR(fid);
1218 /* Ask for all the fields in stat structure. Server will return
1219 * whatever it supports
1222 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
1226 v9fs_stat2inode_dotl(st, dentry->d_inode);
1227 generic_fillattr(dentry->d_inode, stat);
1228 /* Change block size to what the server returned */
1229 stat->blksize = st->st_blksize;
1236 * v9fs_vfs_setattr - set file metadata
1237 * @dentry: file whose metadata to set
1238 * @iattr: metadata assignment structure
1242 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
1245 struct v9fs_session_info *v9ses;
1247 struct p9_wstat wstat;
1249 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1251 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1252 fid = v9fs_fid_lookup(dentry);
1254 return PTR_ERR(fid);
1256 v9fs_blank_wstat(&wstat);
1257 if (iattr->ia_valid & ATTR_MODE)
1258 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
1260 if (iattr->ia_valid & ATTR_MTIME)
1261 wstat.mtime = iattr->ia_mtime.tv_sec;
1263 if (iattr->ia_valid & ATTR_ATIME)
1264 wstat.atime = iattr->ia_atime.tv_sec;
1266 if (iattr->ia_valid & ATTR_SIZE)
1267 wstat.length = iattr->ia_size;
1269 if (v9fs_proto_dotu(v9ses)) {
1270 if (iattr->ia_valid & ATTR_UID)
1271 wstat.n_uid = iattr->ia_uid;
1273 if (iattr->ia_valid & ATTR_GID)
1274 wstat.n_gid = iattr->ia_gid;
1277 retval = p9_client_wstat(fid, &wstat);
1281 if ((iattr->ia_valid & ATTR_SIZE) &&
1282 iattr->ia_size != i_size_read(dentry->d_inode)) {
1283 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
1288 setattr_copy(dentry->d_inode, iattr);
1289 mark_inode_dirty(dentry->d_inode);
1294 * v9fs_vfs_setattr_dotl - set file metadata
1295 * @dentry: file whose metadata to set
1296 * @iattr: metadata assignment structure
1300 int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
1303 struct v9fs_session_info *v9ses;
1305 struct p9_iattr_dotl p9attr;
1307 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1309 retval = inode_change_ok(dentry->d_inode, iattr);
1313 p9attr.valid = iattr->ia_valid;
1314 p9attr.mode = iattr->ia_mode;
1315 p9attr.uid = iattr->ia_uid;
1316 p9attr.gid = iattr->ia_gid;
1317 p9attr.size = iattr->ia_size;
1318 p9attr.atime_sec = iattr->ia_atime.tv_sec;
1319 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
1320 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
1321 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
1324 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1325 fid = v9fs_fid_lookup(dentry);
1327 return PTR_ERR(fid);
1329 retval = p9_client_setattr(fid, &p9attr);
1333 if ((iattr->ia_valid & ATTR_SIZE) &&
1334 iattr->ia_size != i_size_read(dentry->d_inode)) {
1335 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
1340 setattr_copy(dentry->d_inode, iattr);
1341 mark_inode_dirty(dentry->d_inode);
1342 if (iattr->ia_valid & ATTR_MODE) {
1343 /* We also want to update ACL when we update mode bits */
1344 retval = v9fs_acl_chmod(dentry);
1352 * v9fs_stat2inode - populate an inode structure with mistat info
1353 * @stat: Plan 9 metadata (mistat) structure
1354 * @inode: inode to populate
1355 * @sb: superblock of filesystem
1360 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
1361 struct super_block *sb)
1365 unsigned int i_nlink;
1366 struct v9fs_session_info *v9ses = sb->s_fs_info;
1370 inode->i_atime.tv_sec = stat->atime;
1371 inode->i_mtime.tv_sec = stat->mtime;
1372 inode->i_ctime.tv_sec = stat->mtime;
1374 inode->i_uid = v9ses->dfltuid;
1375 inode->i_gid = v9ses->dfltgid;
1377 if (v9fs_proto_dotu(v9ses)) {
1378 inode->i_uid = stat->n_uid;
1379 inode->i_gid = stat->n_gid;
1381 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
1382 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
1384 * Hadlink support got added later to
1385 * to the .u extension. So there can be
1386 * server out there that doesn't support
1387 * this even with .u extension. So check
1388 * for non NULL stat->extension
1390 strncpy(ext, stat->extension, sizeof(ext));
1391 /* HARDLINKCOUNT %u */
1392 sscanf(ext, "%13s %u", tag_name, &i_nlink);
1393 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
1394 inode->i_nlink = i_nlink;
1397 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
1398 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
1403 strncpy(ext, stat->extension, sizeof(ext));
1404 sscanf(ext, "%c %u %u", &type, &major, &minor);
1407 inode->i_mode &= ~S_IFBLK;
1408 inode->i_mode |= S_IFCHR;
1413 P9_DPRINTK(P9_DEBUG_ERROR,
1414 "Unknown special type %c %s\n", type,
1417 inode->i_rdev = MKDEV(major, minor);
1418 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1422 i_size_write(inode, stat->length);
1424 /* not real number of blocks, but 512 byte ones ... */
1425 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
1429 * v9fs_stat2inode_dotl - populate an inode structure with stat info
1430 * @stat: stat structure
1431 * @inode: inode to populate
1432 * @sb: superblock of filesystem
1437 v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
1440 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
1441 inode->i_atime.tv_sec = stat->st_atime_sec;
1442 inode->i_atime.tv_nsec = stat->st_atime_nsec;
1443 inode->i_mtime.tv_sec = stat->st_mtime_sec;
1444 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
1445 inode->i_ctime.tv_sec = stat->st_ctime_sec;
1446 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
1447 inode->i_uid = stat->st_uid;
1448 inode->i_gid = stat->st_gid;
1449 inode->i_nlink = stat->st_nlink;
1450 inode->i_mode = stat->st_mode;
1451 inode->i_rdev = new_decode_dev(stat->st_rdev);
1453 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
1454 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1456 i_size_write(inode, stat->st_size);
1457 inode->i_blocks = stat->st_blocks;
1459 if (stat->st_result_mask & P9_STATS_ATIME) {
1460 inode->i_atime.tv_sec = stat->st_atime_sec;
1461 inode->i_atime.tv_nsec = stat->st_atime_nsec;
1463 if (stat->st_result_mask & P9_STATS_MTIME) {
1464 inode->i_mtime.tv_sec = stat->st_mtime_sec;
1465 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
1467 if (stat->st_result_mask & P9_STATS_CTIME) {
1468 inode->i_ctime.tv_sec = stat->st_ctime_sec;
1469 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
1471 if (stat->st_result_mask & P9_STATS_UID)
1472 inode->i_uid = stat->st_uid;
1473 if (stat->st_result_mask & P9_STATS_GID)
1474 inode->i_gid = stat->st_gid;
1475 if (stat->st_result_mask & P9_STATS_NLINK)
1476 inode->i_nlink = stat->st_nlink;
1477 if (stat->st_result_mask & P9_STATS_MODE) {
1478 inode->i_mode = stat->st_mode;
1479 if ((S_ISBLK(inode->i_mode)) ||
1480 (S_ISCHR(inode->i_mode)))
1481 init_special_inode(inode, inode->i_mode,
1484 if (stat->st_result_mask & P9_STATS_RDEV)
1485 inode->i_rdev = new_decode_dev(stat->st_rdev);
1486 if (stat->st_result_mask & P9_STATS_SIZE)
1487 i_size_write(inode, stat->st_size);
1488 if (stat->st_result_mask & P9_STATS_BLOCKS)
1489 inode->i_blocks = stat->st_blocks;
1491 if (stat->st_result_mask & P9_STATS_GEN)
1492 inode->i_generation = stat->st_gen;
1494 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
1495 * because the inode structure does not have fields for them.
1500 * v9fs_qid2ino - convert qid into inode number
1503 * BUG: potential for inode number collisions?
1506 ino_t v9fs_qid2ino(struct p9_qid *qid)
1508 u64 path = qid->path + 2;
1511 if (sizeof(ino_t) == sizeof(path))
1512 memcpy(&i, &path, sizeof(ino_t));
1514 i = (ino_t) (path ^ (path >> 32));
1520 * v9fs_readlink - read a symlink's location (internal version)
1521 * @dentry: dentry for symlink
1522 * @buffer: buffer to load symlink location into
1523 * @buflen: length of buffer
1527 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1531 struct v9fs_session_info *v9ses;
1533 struct p9_wstat *st;
1535 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
1537 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1538 fid = v9fs_fid_lookup(dentry);
1540 return PTR_ERR(fid);
1542 if (!v9fs_proto_dotu(v9ses))
1545 st = p9_client_stat(fid);
1549 if (!(st->mode & P9_DMSYMLINK)) {
1554 /* copy extension buffer into buffer */
1555 strncpy(buffer, st->extension, buflen);
1557 P9_DPRINTK(P9_DEBUG_VFS,
1558 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
1560 retval = strnlen(buffer, buflen);
1568 * v9fs_vfs_follow_link - follow a symlink path
1569 * @dentry: dentry for symlink
1574 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1577 char *link = __getname();
1579 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1582 link = ERR_PTR(-ENOMEM);
1584 len = v9fs_readlink(dentry, link, PATH_MAX);
1588 link = ERR_PTR(len);
1590 link[min(len, PATH_MAX-1)] = 0;
1592 nd_set_link(nd, link);
1598 * v9fs_vfs_put_link - release a symlink path
1599 * @dentry: dentry for symlink
1606 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1608 char *s = nd_get_link(nd);
1610 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1611 IS_ERR(s) ? "<error>" : s);
1617 * v9fs_vfs_mkspecial - create a special file
1618 * @dir: inode to create special file in
1619 * @dentry: dentry to create
1620 * @mode: mode to create special file
1621 * @extension: 9p2000.u format extension string representing special file
1625 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1626 int mode, const char *extension)
1629 struct v9fs_session_info *v9ses;
1632 v9ses = v9fs_inode2v9ses(dir);
1633 if (!v9fs_proto_dotu(v9ses)) {
1634 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1638 perm = unixmode2p9mode(v9ses, mode);
1639 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1642 return PTR_ERR(fid);
1644 p9_client_clunk(fid);
1649 * v9fs_vfs_symlink_dotl - helper function to create symlinks
1650 * @dir: directory inode containing symlink
1651 * @dentry: dentry for symlink
1652 * @symname: symlink data
1654 * See Also: 9P2000.L RFC for more information
1659 v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
1660 const char *symname)
1662 struct v9fs_session_info *v9ses;
1663 struct p9_fid *dfid;
1664 struct p9_fid *fid = NULL;
1665 struct inode *inode;
1671 name = (char *) dentry->d_name.name;
1672 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
1673 dir->i_ino, name, symname);
1674 v9ses = v9fs_inode2v9ses(dir);
1676 dfid = v9fs_fid_lookup(dentry->d_parent);
1678 err = PTR_ERR(dfid);
1679 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
1683 gid = v9fs_get_fsgid_for_create(dir);
1685 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
1686 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
1689 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
1694 /* Now walk from the parent so we can get an unopened fid. */
1695 fid = p9_client_walk(dfid, 1, &name, 1);
1698 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
1704 /* instantiate inode and assign the unopened fid to dentry */
1705 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1706 if (IS_ERR(inode)) {
1707 err = PTR_ERR(inode);
1708 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
1712 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
1713 d_instantiate(dentry, inode);
1714 err = v9fs_fid_add(dentry, fid);
1719 /* Not in cached mode. No need to populate inode with stat */
1720 inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
1721 if (IS_ERR(inode)) {
1722 err = PTR_ERR(inode);
1725 d_set_d_op(dentry, &v9fs_dentry_operations);
1726 d_instantiate(dentry, inode);
1731 p9_client_clunk(fid);
1737 * v9fs_vfs_symlink - helper function to create symlinks
1738 * @dir: directory inode containing symlink
1739 * @dentry: dentry for symlink
1740 * @symname: symlink data
1742 * See Also: 9P2000.u RFC for more information
1747 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1749 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1750 dentry->d_name.name, symname);
1752 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1756 * v9fs_vfs_link - create a hardlink
1757 * @old_dentry: dentry for file to link to
1758 * @dir: inode destination for new link
1759 * @dentry: dentry for link
1764 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1765 struct dentry *dentry)
1768 struct p9_fid *oldfid;
1771 P9_DPRINTK(P9_DEBUG_VFS,
1772 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1773 old_dentry->d_name.name);
1775 oldfid = v9fs_fid_clone(old_dentry);
1777 return PTR_ERR(oldfid);
1780 if (unlikely(!name)) {
1785 sprintf(name, "%d\n", oldfid->fid);
1786 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1790 p9_client_clunk(oldfid);
1795 * v9fs_vfs_link_dotl - create a hardlink for dotl
1796 * @old_dentry: dentry for file to link to
1797 * @dir: inode destination for new link
1798 * @dentry: dentry for link
1803 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
1804 struct dentry *dentry)
1807 struct p9_fid *dfid, *oldfid;
1809 struct v9fs_session_info *v9ses;
1810 struct dentry *dir_dentry;
1812 P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
1813 dir->i_ino, old_dentry->d_name.name,
1814 dentry->d_name.name);
1816 v9ses = v9fs_inode2v9ses(dir);
1817 dir_dentry = v9fs_dentry_from_dir_inode(dir);
1818 dfid = v9fs_fid_lookup(dir_dentry);
1820 return PTR_ERR(dfid);
1822 oldfid = v9fs_fid_lookup(old_dentry);
1824 return PTR_ERR(oldfid);
1826 name = (char *) dentry->d_name.name;
1828 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
1831 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
1835 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1836 /* Get the latest stat info from server. */
1838 struct p9_stat_dotl *st;
1840 fid = v9fs_fid_lookup(old_dentry);
1842 return PTR_ERR(fid);
1844 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
1848 v9fs_stat2inode_dotl(st, old_dentry->d_inode);
1852 /* Caching disabled. No need to get upto date stat info.
1853 * This dentry will be released immediately. So, just hold the
1856 ihold(old_dentry->d_inode);
1859 d_set_d_op(dentry, old_dentry->d_op);
1860 d_instantiate(dentry, old_dentry->d_inode);
1866 * v9fs_vfs_mknod - create a special file
1867 * @dir: inode destination for new link
1868 * @dentry: dentry for file
1869 * @mode: mode for creation
1870 * @rdev: device associated with special file
1875 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1880 P9_DPRINTK(P9_DEBUG_VFS,
1881 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1882 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1884 if (!new_valid_dev(rdev))
1890 /* build extension */
1892 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1893 else if (S_ISCHR(mode))
1894 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1895 else if (S_ISFIFO(mode))
1897 else if (S_ISSOCK(mode))
1904 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1911 * v9fs_vfs_mknod_dotl - create a special file
1912 * @dir: inode destination for new link
1913 * @dentry: dentry for file
1914 * @mode: mode for creation
1915 * @rdev: device associated with special file
1919 v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
1925 struct v9fs_session_info *v9ses;
1926 struct p9_fid *fid = NULL, *dfid = NULL;
1927 struct inode *inode;
1930 struct dentry *dir_dentry;
1931 struct posix_acl *dacl = NULL, *pacl = NULL;
1933 P9_DPRINTK(P9_DEBUG_VFS,
1934 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1935 dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
1937 if (!new_valid_dev(rdev))
1940 v9ses = v9fs_inode2v9ses(dir);
1941 dir_dentry = v9fs_dentry_from_dir_inode(dir);
1942 dfid = v9fs_fid_lookup(dir_dentry);
1944 err = PTR_ERR(dfid);
1945 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
1950 gid = v9fs_get_fsgid_for_create(dir);
1952 /* Update mode based on ACL value */
1953 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
1955 P9_DPRINTK(P9_DEBUG_VFS,
1956 "Failed to get acl values in mknod %d\n", err);
1959 name = (char *) dentry->d_name.name;
1961 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
1965 /* instantiate inode and assign the unopened fid to the dentry */
1966 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1967 fid = p9_client_walk(dfid, 1, &name, 1);
1970 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
1976 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1977 if (IS_ERR(inode)) {
1978 err = PTR_ERR(inode);
1979 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
1983 d_set_d_op(dentry, &v9fs_cached_dentry_operations);
1984 d_instantiate(dentry, inode);
1985 err = v9fs_fid_add(dentry, fid);
1991 * Not in cached mode. No need to populate inode with stat.
1992 * socket syscall returns a fd, so we need instantiate
1994 inode = v9fs_get_inode(dir->i_sb, mode);
1995 if (IS_ERR(inode)) {
1996 err = PTR_ERR(inode);
1999 d_set_d_op(dentry, &v9fs_dentry_operations);
2000 d_instantiate(dentry, inode);
2002 /* Now set the ACL based on the default value */
2003 v9fs_set_create_acl(dentry, dacl, pacl);
2006 p9_client_clunk(fid);
2011 v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen)
2015 char *target = NULL;
2017 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
2019 fid = v9fs_fid_lookup(dentry);
2021 return PTR_ERR(fid);
2023 retval = p9_client_readlink(fid, &target);
2027 strncpy(buffer, target, buflen);
2028 P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer);
2030 retval = strnlen(buffer, buflen);
2035 * v9fs_vfs_follow_link_dotl - follow a symlink path
2036 * @dentry: dentry for symlink
2042 v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
2045 char *link = __getname();
2047 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
2050 link = ERR_PTR(-ENOMEM);
2052 len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX);
2055 link = ERR_PTR(len);
2057 link[min(len, PATH_MAX-1)] = 0;
2059 nd_set_link(nd, link);
2064 static const struct inode_operations v9fs_dir_inode_operations_dotu = {
2065 .create = v9fs_vfs_create,
2066 .lookup = v9fs_vfs_lookup,
2067 .symlink = v9fs_vfs_symlink,
2068 .link = v9fs_vfs_link,
2069 .unlink = v9fs_vfs_unlink,
2070 .mkdir = v9fs_vfs_mkdir,
2071 .rmdir = v9fs_vfs_rmdir,
2072 .mknod = v9fs_vfs_mknod,
2073 .rename = v9fs_vfs_rename,
2074 .getattr = v9fs_vfs_getattr,
2075 .setattr = v9fs_vfs_setattr,
2078 static const struct inode_operations v9fs_dir_inode_operations_dotl = {
2079 .create = v9fs_vfs_create_dotl,
2080 .lookup = v9fs_vfs_lookup,
2081 .link = v9fs_vfs_link_dotl,
2082 .symlink = v9fs_vfs_symlink_dotl,
2083 .unlink = v9fs_vfs_unlink,
2084 .mkdir = v9fs_vfs_mkdir_dotl,
2085 .rmdir = v9fs_vfs_rmdir,
2086 .mknod = v9fs_vfs_mknod_dotl,
2087 .rename = v9fs_vfs_rename,
2088 .getattr = v9fs_vfs_getattr_dotl,
2089 .setattr = v9fs_vfs_setattr_dotl,
2090 .setxattr = generic_setxattr,
2091 .getxattr = generic_getxattr,
2092 .removexattr = generic_removexattr,
2093 .listxattr = v9fs_listxattr,
2094 .check_acl = v9fs_check_acl,
2097 static const struct inode_operations v9fs_dir_inode_operations = {
2098 .create = v9fs_vfs_create,
2099 .lookup = v9fs_vfs_lookup,
2100 .unlink = v9fs_vfs_unlink,
2101 .mkdir = v9fs_vfs_mkdir,
2102 .rmdir = v9fs_vfs_rmdir,
2103 .mknod = v9fs_vfs_mknod,
2104 .rename = v9fs_vfs_rename,
2105 .getattr = v9fs_vfs_getattr,
2106 .setattr = v9fs_vfs_setattr,
2109 static const struct inode_operations v9fs_file_inode_operations = {
2110 .getattr = v9fs_vfs_getattr,
2111 .setattr = v9fs_vfs_setattr,
2114 static const struct inode_operations v9fs_file_inode_operations_dotl = {
2115 .getattr = v9fs_vfs_getattr_dotl,
2116 .setattr = v9fs_vfs_setattr_dotl,
2117 .setxattr = generic_setxattr,
2118 .getxattr = generic_getxattr,
2119 .removexattr = generic_removexattr,
2120 .listxattr = v9fs_listxattr,
2121 .check_acl = v9fs_check_acl,
2124 static const struct inode_operations v9fs_symlink_inode_operations = {
2125 .readlink = generic_readlink,
2126 .follow_link = v9fs_vfs_follow_link,
2127 .put_link = v9fs_vfs_put_link,
2128 .getattr = v9fs_vfs_getattr,
2129 .setattr = v9fs_vfs_setattr,
2132 static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
2133 .readlink = v9fs_vfs_readlink_dotl,
2134 .follow_link = v9fs_vfs_follow_link_dotl,
2135 .put_link = v9fs_vfs_put_link,
2136 .getattr = v9fs_vfs_getattr_dotl,
2137 .setattr = v9fs_vfs_setattr_dotl,
2138 .setxattr = generic_setxattr,
2139 .getxattr = generic_getxattr,
2140 .removexattr = generic_removexattr,
2141 .listxattr = v9fs_listxattr,