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nfsd4: typo logical vs bitwise negate for want_mask
[linux-btrfs-devel.git] / fs / 9p / vfs_inode.c
blob8bb5507e822f4151574f564150f48acd4531f002
1 /*
2 * linux/fs/9p/vfs_inode.c
3 *
4 * This file contains vfs inode ops for the 9P2000 protocol.
5 *
6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
8 *
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.
12 *
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.
17 *
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
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/errno.h>
28 #include <linux/fs.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>
42
43 #include "v9fs.h"
44 #include "v9fs_vfs.h"
45 #include "fid.h"
46 #include "cache.h"
47 #include "xattr.h"
48 #include "acl.h"
49
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_file_inode_operations;
53 static const struct inode_operations v9fs_symlink_inode_operations;
54
55 /**
56 * unixmode2p9mode - convert unix mode bits to plan 9
57 * @v9ses: v9fs session information
58 * @mode: mode to convert
59 *
60 */
61
62 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
63 {
64 int res;
65 res = mode & 0777;
66 if (S_ISDIR(mode))
67 res |= P9_DMDIR;
68 if (v9fs_proto_dotu(v9ses)) {
69 if (S_ISLNK(mode))
70 res |= P9_DMSYMLINK;
71 if (v9ses->nodev == 0) {
72 if (S_ISSOCK(mode))
73 res |= P9_DMSOCKET;
74 if (S_ISFIFO(mode))
75 res |= P9_DMNAMEDPIPE;
76 if (S_ISBLK(mode))
77 res |= P9_DMDEVICE;
78 if (S_ISCHR(mode))
79 res |= P9_DMDEVICE;
80 }
81
82 if ((mode & S_ISUID) == S_ISUID)
83 res |= P9_DMSETUID;
84 if ((mode & S_ISGID) == S_ISGID)
85 res |= P9_DMSETGID;
86 if ((mode & S_ISVTX) == S_ISVTX)
87 res |= P9_DMSETVTX;
88 if ((mode & P9_DMLINK))
89 res |= P9_DMLINK;
90 }
91
92 return res;
93 }
94
95 /**
96 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
97 * @v9ses: v9fs session information
98 * @mode: mode to convert
99 *
100 */
101
102 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
103 {
104 int res;
105
106 res = mode & 0777;
107
108 if ((mode & P9_DMDIR) == P9_DMDIR)
109 res |= S_IFDIR;
110 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
111 res |= S_IFLNK;
112 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
113 && (v9ses->nodev == 0))
114 res |= S_IFSOCK;
115 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
116 && (v9ses->nodev == 0))
117 res |= S_IFIFO;
118 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
119 && (v9ses->nodev == 0))
120 res |= S_IFBLK;
121 else
122 res |= S_IFREG;
123
124 if (v9fs_proto_dotu(v9ses)) {
125 if ((mode & P9_DMSETUID) == P9_DMSETUID)
126 res |= S_ISUID;
127
128 if ((mode & P9_DMSETGID) == P9_DMSETGID)
129 res |= S_ISGID;
130
131 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
132 res |= S_ISVTX;
133 }
134
135 return res;
136 }
137
138 /**
139 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
140 * @uflags: flags to convert
141 * @extended: if .u extensions are active
142 */
143
144 int v9fs_uflags2omode(int uflags, int extended)
145 {
146 int ret;
147
148 ret = 0;
149 switch (uflags&3) {
150 default:
151 case O_RDONLY:
152 ret = P9_OREAD;
153 break;
154
155 case O_WRONLY:
156 ret = P9_OWRITE;
157 break;
158
159 case O_RDWR:
160 ret = P9_ORDWR;
161 break;
162 }
163
164 if (uflags & O_TRUNC)
165 ret |= P9_OTRUNC;
166
167 if (extended) {
168 if (uflags & O_EXCL)
169 ret |= P9_OEXCL;
170
171 if (uflags & O_APPEND)
172 ret |= P9_OAPPEND;
173 }
174
175 return ret;
176 }
177
178 /**
179 * v9fs_blank_wstat - helper function to setup a 9P stat structure
180 * @wstat: structure to initialize
181 *
182 */
183
184 void
185 v9fs_blank_wstat(struct p9_wstat *wstat)
186 {
187 wstat->type = ~0;
188 wstat->dev = ~0;
189 wstat->qid.type = ~0;
190 wstat->qid.version = ~0;
191 *((long long *)&wstat->qid.path) = ~0;
192 wstat->mode = ~0;
193 wstat->atime = ~0;
194 wstat->mtime = ~0;
195 wstat->length = ~0;
196 wstat->name = NULL;
197 wstat->uid = NULL;
198 wstat->gid = NULL;
199 wstat->muid = NULL;
200 wstat->n_uid = ~0;
201 wstat->n_gid = ~0;
202 wstat->n_muid = ~0;
203 wstat->extension = NULL;
204 }
205
206 /**
207 * v9fs_alloc_inode - helper function to allocate an inode
208 *
209 */
210 struct inode *v9fs_alloc_inode(struct super_block *sb)
211 {
212 struct v9fs_inode *v9inode;
213 v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
214 GFP_KERNEL);
215 if (!v9inode)
216 return NULL;
217 #ifdef CONFIG_9P_FSCACHE
218 v9inode->fscache = NULL;
219 spin_lock_init(&v9inode->fscache_lock);
220 #endif
221 v9inode->writeback_fid = NULL;
222 v9inode->cache_validity = 0;
223 mutex_init(&v9inode->v_mutex);
224 return &v9inode->vfs_inode;
225 }
226
227 /**
228 * v9fs_destroy_inode - destroy an inode
229 *
230 */
231
232 static void v9fs_i_callback(struct rcu_head *head)
233 {
234 struct inode *inode = container_of(head, struct inode, i_rcu);
235 INIT_LIST_HEAD(&inode->i_dentry);
236 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
237 }
238
239 void v9fs_destroy_inode(struct inode *inode)
240 {
241 call_rcu(&inode->i_rcu, v9fs_i_callback);
242 }
243
244 int v9fs_init_inode(struct v9fs_session_info *v9ses,
245 struct inode *inode, int mode)
246 {
247 int err = 0;
248
249 inode_init_owner(inode, NULL, mode);
250 inode->i_blocks = 0;
251 inode->i_rdev = 0;
252 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
253 inode->i_mapping->a_ops = &v9fs_addr_operations;
254
255 switch (mode & S_IFMT) {
256 case S_IFIFO:
257 case S_IFBLK:
258 case S_IFCHR:
259 case S_IFSOCK:
260 if (v9fs_proto_dotl(v9ses)) {
261 inode->i_op = &v9fs_file_inode_operations_dotl;
262 inode->i_fop = &v9fs_file_operations_dotl;
263 } else if (v9fs_proto_dotu(v9ses)) {
264 inode->i_op = &v9fs_file_inode_operations;
265 inode->i_fop = &v9fs_file_operations;
266 } else {
267 P9_DPRINTK(P9_DEBUG_ERROR,
268 "special files without extended mode\n");
269 err = -EINVAL;
270 goto error;
271 }
272 init_special_inode(inode, inode->i_mode, inode->i_rdev);
273 break;
274 case S_IFREG:
275 if (v9fs_proto_dotl(v9ses)) {
276 inode->i_op = &v9fs_file_inode_operations_dotl;
277 if (v9ses->cache)
278 inode->i_fop =
279 &v9fs_cached_file_operations_dotl;
280 else
281 inode->i_fop = &v9fs_file_operations_dotl;
282 } else {
283 inode->i_op = &v9fs_file_inode_operations;
284 if (v9ses->cache)
285 inode->i_fop = &v9fs_cached_file_operations;
286 else
287 inode->i_fop = &v9fs_file_operations;
288 }
289
290 break;
291 case S_IFLNK:
292 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
293 P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
294 "legacy protocol.\n");
295 err = -EINVAL;
296 goto error;
297 }
298
299 if (v9fs_proto_dotl(v9ses))
300 inode->i_op = &v9fs_symlink_inode_operations_dotl;
301 else
302 inode->i_op = &v9fs_symlink_inode_operations;
303
304 break;
305 case S_IFDIR:
306 inc_nlink(inode);
307 if (v9fs_proto_dotl(v9ses))
308 inode->i_op = &v9fs_dir_inode_operations_dotl;
309 else if (v9fs_proto_dotu(v9ses))
310 inode->i_op = &v9fs_dir_inode_operations_dotu;
311 else
312 inode->i_op = &v9fs_dir_inode_operations;
313
314 if (v9fs_proto_dotl(v9ses))
315 inode->i_fop = &v9fs_dir_operations_dotl;
316 else
317 inode->i_fop = &v9fs_dir_operations;
318
319 break;
320 default:
321 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
322 mode, mode & S_IFMT);
323 err = -EINVAL;
324 goto error;
325 }
326 error:
327 return err;
328
329 }
330
331 /**
332 * v9fs_get_inode - helper function to setup an inode
333 * @sb: superblock
334 * @mode: mode to setup inode with
335 *
336 */
337
338 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
339 {
340 int err;
341 struct inode *inode;
342 struct v9fs_session_info *v9ses = sb->s_fs_info;
343
344 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
345
346 inode = new_inode(sb);
347 if (!inode) {
348 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
349 return ERR_PTR(-ENOMEM);
350 }
351 err = v9fs_init_inode(v9ses, inode, mode);
352 if (err) {
353 iput(inode);
354 return ERR_PTR(err);
355 }
356 return inode;
357 }
358
359 /*
360 static struct v9fs_fid*
361 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
362 {
363 int err;
364 int nfid;
365 struct v9fs_fid *ret;
366 struct v9fs_fcall *fcall;
367
368 nfid = v9fs_get_idpool(&v9ses->fidpool);
369 if (nfid < 0) {
370 eprintk(KERN_WARNING, "no free fids available\n");
371 return ERR_PTR(-ENOSPC);
372 }
373
374 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
375 &fcall);
376
377 if (err < 0) {
378 if (fcall && fcall->id == RWALK)
379 goto clunk_fid;
380
381 PRINT_FCALL_ERROR("walk error", fcall);
382 v9fs_put_idpool(nfid, &v9ses->fidpool);
383 goto error;
384 }
385
386 kfree(fcall);
387 fcall = NULL;
388 ret = v9fs_fid_create(v9ses, nfid);
389 if (!ret) {
390 err = -ENOMEM;
391 goto clunk_fid;
392 }
393
394 err = v9fs_fid_insert(ret, dentry);
395 if (err < 0) {
396 v9fs_fid_destroy(ret);
397 goto clunk_fid;
398 }
399
400 return ret;
401
402 clunk_fid:
403 v9fs_t_clunk(v9ses, nfid);
404
405 error:
406 kfree(fcall);
407 return ERR_PTR(err);
408 }
409 */
410
411
412 /**
413 * v9fs_clear_inode - release an inode
414 * @inode: inode to release
415 *
416 */
417 void v9fs_evict_inode(struct inode *inode)
418 {
419 struct v9fs_inode *v9inode = V9FS_I(inode);
420
421 truncate_inode_pages(inode->i_mapping, 0);
422 end_writeback(inode);
423 filemap_fdatawrite(inode->i_mapping);
424
425 #ifdef CONFIG_9P_FSCACHE
426 v9fs_cache_inode_put_cookie(inode);
427 #endif
428 /* clunk the fid stashed in writeback_fid */
429 if (v9inode->writeback_fid) {
430 p9_client_clunk(v9inode->writeback_fid);
431 v9inode->writeback_fid = NULL;
432 }
433 }
434
435 static int v9fs_test_inode(struct inode *inode, void *data)
436 {
437 int umode;
438 struct v9fs_inode *v9inode = V9FS_I(inode);
439 struct p9_wstat *st = (struct p9_wstat *)data;
440 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
441
442 umode = p9mode2unixmode(v9ses, st->mode);
443 /* don't match inode of different type */
444 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
445 return 0;
446
447 /* compare qid details */
448 if (memcmp(&v9inode->qid.version,
449 &st->qid.version, sizeof(v9inode->qid.version)))
450 return 0;
451
452 if (v9inode->qid.type != st->qid.type)
453 return 0;
454 return 1;
455 }
456
457 static int v9fs_test_new_inode(struct inode *inode, void *data)
458 {
459 return 0;
460 }
461
462 static int v9fs_set_inode(struct inode *inode, void *data)
463 {
464 struct v9fs_inode *v9inode = V9FS_I(inode);
465 struct p9_wstat *st = (struct p9_wstat *)data;
466
467 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
468 return 0;
469 }
470
471 static struct inode *v9fs_qid_iget(struct super_block *sb,
472 struct p9_qid *qid,
473 struct p9_wstat *st,
474 int new)
475 {
476 int retval, umode;
477 unsigned long i_ino;
478 struct inode *inode;
479 struct v9fs_session_info *v9ses = sb->s_fs_info;
480 int (*test)(struct inode *, void *);
481
482 if (new)
483 test = v9fs_test_new_inode;
484 else
485 test = v9fs_test_inode;
486
487 i_ino = v9fs_qid2ino(qid);
488 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
489 if (!inode)
490 return ERR_PTR(-ENOMEM);
491 if (!(inode->i_state & I_NEW))
492 return inode;
493 /*
494 * initialize the inode with the stat info
495 * FIXME!! we may need support for stale inodes
496 * later.
497 */
498 inode->i_ino = i_ino;
499 umode = p9mode2unixmode(v9ses, st->mode);
500 retval = v9fs_init_inode(v9ses, inode, umode);
501 if (retval)
502 goto error;
503
504 v9fs_stat2inode(st, inode, sb);
505 #ifdef CONFIG_9P_FSCACHE
506 v9fs_cache_inode_get_cookie(inode);
507 #endif
508 unlock_new_inode(inode);
509 return inode;
510 error:
511 unlock_new_inode(inode);
512 iput(inode);
513 return ERR_PTR(retval);
514
515 }
516
517 struct inode *
518 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
519 struct super_block *sb, int new)
520 {
521 struct p9_wstat *st;
522 struct inode *inode = NULL;
523
524 st = p9_client_stat(fid);
525 if (IS_ERR(st))
526 return ERR_CAST(st);
527
528 inode = v9fs_qid_iget(sb, &st->qid, st, new);
529 p9stat_free(st);
530 kfree(st);
531 return inode;
532 }
533
534 /**
535 * v9fs_remove - helper function to remove files and directories
536 * @dir: directory inode that is being deleted
537 * @dentry: dentry that is being deleted
538 * @rmdir: removing a directory
539 *
540 */
541
542 static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
543 {
544 struct inode *inode;
545 int retval = -EOPNOTSUPP;
546 struct p9_fid *v9fid, *dfid;
547 struct v9fs_session_info *v9ses;
548
549 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
550 dir, dentry, flags);
551
552 v9ses = v9fs_inode2v9ses(dir);
553 inode = dentry->d_inode;
554 dfid = v9fs_fid_lookup(dentry->d_parent);
555 if (IS_ERR(dfid)) {
556 retval = PTR_ERR(dfid);
557 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
558 return retval;
559 }
560 if (v9fs_proto_dotl(v9ses))
561 retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags);
562 if (retval == -EOPNOTSUPP) {
563 /* Try the one based on path */
564 v9fid = v9fs_fid_clone(dentry);
565 if (IS_ERR(v9fid))
566 return PTR_ERR(v9fid);
567 retval = p9_client_remove(v9fid);
568 }
569 if (!retval) {
570 /*
571 * directories on unlink should have zero
572 * link count
573 */
574 if (flags & AT_REMOVEDIR) {
575 clear_nlink(inode);
576 drop_nlink(dir);
577 } else
578 drop_nlink(inode);
579
580 v9fs_invalidate_inode_attr(inode);
581 v9fs_invalidate_inode_attr(dir);
582 }
583 return retval;
584 }
585
586 /**
587 * v9fs_create - Create a file
588 * @v9ses: session information
589 * @dir: directory that dentry is being created in
590 * @dentry: dentry that is being created
591 * @extension: 9p2000.u extension string to support devices, etc.
592 * @perm: create permissions
593 * @mode: open mode
594 *
595 */
596 static struct p9_fid *
597 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
598 struct dentry *dentry, char *extension, u32 perm, u8 mode)
599 {
600 int err;
601 char *name;
602 struct p9_fid *dfid, *ofid, *fid;
603 struct inode *inode;
604
605 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
606
607 err = 0;
608 ofid = NULL;
609 fid = NULL;
610 name = (char *) dentry->d_name.name;
611 dfid = v9fs_fid_lookup(dentry->d_parent);
612 if (IS_ERR(dfid)) {
613 err = PTR_ERR(dfid);
614 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
615 return ERR_PTR(err);
616 }
617
618 /* clone a fid to use for creation */
619 ofid = p9_client_walk(dfid, 0, NULL, 1);
620 if (IS_ERR(ofid)) {
621 err = PTR_ERR(ofid);
622 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
623 return ERR_PTR(err);
624 }
625
626 err = p9_client_fcreate(ofid, name, perm, mode, extension);
627 if (err < 0) {
628 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
629 goto error;
630 }
631
632 /* now walk from the parent so we can get unopened fid */
633 fid = p9_client_walk(dfid, 1, &name, 1);
634 if (IS_ERR(fid)) {
635 err = PTR_ERR(fid);
636 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
637 fid = NULL;
638 goto error;
639 }
640
641 /* instantiate inode and assign the unopened fid to the dentry */
642 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
643 if (IS_ERR(inode)) {
644 err = PTR_ERR(inode);
645 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
646 goto error;
647 }
648 d_instantiate(dentry, inode);
649 err = v9fs_fid_add(dentry, fid);
650 if (err < 0)
651 goto error;
652
653 return ofid;
654
655 error:
656 if (ofid)
657 p9_client_clunk(ofid);
658
659 if (fid)
660 p9_client_clunk(fid);
661
662 return ERR_PTR(err);
663 }
664
665 /**
666 * v9fs_vfs_create - VFS hook to create files
667 * @dir: directory inode that is being created
668 * @dentry: dentry that is being deleted
669 * @mode: create permissions
670 * @nd: path information
671 *
672 */
673
674 static int
675 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
676 struct nameidata *nd)
677 {
678 int err;
679 u32 perm;
680 int flags;
681 struct file *filp;
682 struct v9fs_inode *v9inode;
683 struct v9fs_session_info *v9ses;
684 struct p9_fid *fid, *inode_fid;
685
686 err = 0;
687 fid = NULL;
688 v9ses = v9fs_inode2v9ses(dir);
689 perm = unixmode2p9mode(v9ses, mode);
690 if (nd)
691 flags = nd->intent.open.flags;
692 else
693 flags = O_RDWR;
694
695 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
696 v9fs_uflags2omode(flags,
697 v9fs_proto_dotu(v9ses)));
698 if (IS_ERR(fid)) {
699 err = PTR_ERR(fid);
700 fid = NULL;
701 goto error;
702 }
703
704 v9fs_invalidate_inode_attr(dir);
705 /* if we are opening a file, assign the open fid to the file */
706 if (nd) {
707 v9inode = V9FS_I(dentry->d_inode);
708 mutex_lock(&v9inode->v_mutex);
709 if (v9ses->cache && !v9inode->writeback_fid &&
710 ((flags & O_ACCMODE) != O_RDONLY)) {
711 /*
712 * clone a fid and add it to writeback_fid
713 * we do it during open time instead of
714 * page dirty time via write_begin/page_mkwrite
715 * because we want write after unlink usecase
716 * to work.
717 */
718 inode_fid = v9fs_writeback_fid(dentry);
719 if (IS_ERR(inode_fid)) {
720 err = PTR_ERR(inode_fid);
721 mutex_unlock(&v9inode->v_mutex);
722 goto error;
723 }
724 v9inode->writeback_fid = (void *) inode_fid;
725 }
726 mutex_unlock(&v9inode->v_mutex);
727 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
728 if (IS_ERR(filp)) {
729 err = PTR_ERR(filp);
730 goto error;
731 }
732
733 filp->private_data = fid;
734 #ifdef CONFIG_9P_FSCACHE
735 if (v9ses->cache)
736 v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
737 #endif
738 } else
739 p9_client_clunk(fid);
740
741 return 0;
742
743 error:
744 if (fid)
745 p9_client_clunk(fid);
746
747 return err;
748 }
749
750 /**
751 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
752 * @dir: inode that is being unlinked
753 * @dentry: dentry that is being unlinked
754 * @mode: mode for new directory
755 *
756 */
757
758 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
759 {
760 int err;
761 u32 perm;
762 struct p9_fid *fid;
763 struct v9fs_session_info *v9ses;
764
765 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
766 err = 0;
767 v9ses = v9fs_inode2v9ses(dir);
768 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
769 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
770 if (IS_ERR(fid)) {
771 err = PTR_ERR(fid);
772 fid = NULL;
773 } else {
774 inc_nlink(dir);
775 v9fs_invalidate_inode_attr(dir);
776 }
777
778 if (fid)
779 p9_client_clunk(fid);
780
781 return err;
782 }
783
784 /**
785 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
786 * @dir: inode that is being walked from
787 * @dentry: dentry that is being walked to?
788 * @nameidata: path data
789 *
790 */
791
792 struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
793 struct nameidata *nameidata)
794 {
795 struct super_block *sb;
796 struct v9fs_session_info *v9ses;
797 struct p9_fid *dfid, *fid;
798 struct inode *inode;
799 char *name;
800 int result = 0;
801
802 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
803 dir, dentry->d_name.name, dentry, nameidata);
804
805 if (dentry->d_name.len > NAME_MAX)
806 return ERR_PTR(-ENAMETOOLONG);
807
808 sb = dir->i_sb;
809 v9ses = v9fs_inode2v9ses(dir);
810 /* We can walk d_parent because we hold the dir->i_mutex */
811 dfid = v9fs_fid_lookup(dentry->d_parent);
812 if (IS_ERR(dfid))
813 return ERR_CAST(dfid);
814
815 name = (char *) dentry->d_name.name;
816 fid = p9_client_walk(dfid, 1, &name, 1);
817 if (IS_ERR(fid)) {
818 result = PTR_ERR(fid);
819 if (result == -ENOENT) {
820 inode = NULL;
821 goto inst_out;
822 }
823
824 return ERR_PTR(result);
825 }
826
827 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
828 if (IS_ERR(inode)) {
829 result = PTR_ERR(inode);
830 inode = NULL;
831 goto error;
832 }
833
834 result = v9fs_fid_add(dentry, fid);
835 if (result < 0)
836 goto error_iput;
837
838 inst_out:
839 d_add(dentry, inode);
840 return NULL;
841
842 error_iput:
843 iput(inode);
844 error:
845 p9_client_clunk(fid);
846
847 return ERR_PTR(result);
848 }
849
850 /**
851 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
852 * @i: inode that is being unlinked
853 * @d: dentry that is being unlinked
854 *
855 */
856
857 int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
858 {
859 return v9fs_remove(i, d, 0);
860 }
861
862 /**
863 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
864 * @i: inode that is being unlinked
865 * @d: dentry that is being unlinked
866 *
867 */
868
869 int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
870 {
871 return v9fs_remove(i, d, AT_REMOVEDIR);
872 }
873
874 /**
875 * v9fs_vfs_rename - VFS hook to rename an inode
876 * @old_dir: old dir inode
877 * @old_dentry: old dentry
878 * @new_dir: new dir inode
879 * @new_dentry: new dentry
880 *
881 */
882
883 int
884 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
885 struct inode *new_dir, struct dentry *new_dentry)
886 {
887 int retval;
888 struct inode *old_inode;
889 struct inode *new_inode;
890 struct v9fs_session_info *v9ses;
891 struct p9_fid *oldfid;
892 struct p9_fid *olddirfid;
893 struct p9_fid *newdirfid;
894 struct p9_wstat wstat;
895
896 P9_DPRINTK(P9_DEBUG_VFS, "\n");
897 retval = 0;
898 old_inode = old_dentry->d_inode;
899 new_inode = new_dentry->d_inode;
900 v9ses = v9fs_inode2v9ses(old_inode);
901 oldfid = v9fs_fid_lookup(old_dentry);
902 if (IS_ERR(oldfid))
903 return PTR_ERR(oldfid);
904
905 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
906 if (IS_ERR(olddirfid)) {
907 retval = PTR_ERR(olddirfid);
908 goto done;
909 }
910
911 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
912 if (IS_ERR(newdirfid)) {
913 retval = PTR_ERR(newdirfid);
914 goto clunk_olddir;
915 }
916
917 down_write(&v9ses->rename_sem);
918 if (v9fs_proto_dotl(v9ses)) {
919 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name,
920 newdirfid, new_dentry->d_name.name);
921 if (retval == -EOPNOTSUPP)
922 retval = p9_client_rename(oldfid, newdirfid,
923 new_dentry->d_name.name);
924 if (retval != -EOPNOTSUPP)
925 goto clunk_newdir;
926 }
927 if (old_dentry->d_parent != new_dentry->d_parent) {
928 /*
929 * 9P .u can only handle file rename in the same directory
930 */
931
932 P9_DPRINTK(P9_DEBUG_ERROR,
933 "old dir and new dir are different\n");
934 retval = -EXDEV;
935 goto clunk_newdir;
936 }
937 v9fs_blank_wstat(&wstat);
938 wstat.muid = v9ses->uname;
939 wstat.name = (char *) new_dentry->d_name.name;
940 retval = p9_client_wstat(oldfid, &wstat);
941
942 clunk_newdir:
943 if (!retval) {
944 if (new_inode) {
945 if (S_ISDIR(new_inode->i_mode))
946 clear_nlink(new_inode);
947 else
948 drop_nlink(new_inode);
949 }
950 if (S_ISDIR(old_inode->i_mode)) {
951 if (!new_inode)
952 inc_nlink(new_dir);
953 drop_nlink(old_dir);
954 }
955 v9fs_invalidate_inode_attr(old_inode);
956 v9fs_invalidate_inode_attr(old_dir);
957 v9fs_invalidate_inode_attr(new_dir);
958
959 /* successful rename */
960 d_move(old_dentry, new_dentry);
961 }
962 up_write(&v9ses->rename_sem);
963 p9_client_clunk(newdirfid);
964
965 clunk_olddir:
966 p9_client_clunk(olddirfid);
967
968 done:
969 return retval;
970 }
971
972 /**
973 * v9fs_vfs_getattr - retrieve file metadata
974 * @mnt: mount information
975 * @dentry: file to get attributes on
976 * @stat: metadata structure to populate
977 *
978 */
979
980 static int
981 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
982 struct kstat *stat)
983 {
984 int err;
985 struct v9fs_session_info *v9ses;
986 struct p9_fid *fid;
987 struct p9_wstat *st;
988
989 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
990 err = -EPERM;
991 v9ses = v9fs_dentry2v9ses(dentry);
992 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
993 generic_fillattr(dentry->d_inode, stat);
994 return 0;
995 }
996 fid = v9fs_fid_lookup(dentry);
997 if (IS_ERR(fid))
998 return PTR_ERR(fid);
999
1000 st = p9_client_stat(fid);
1001 if (IS_ERR(st))
1002 return PTR_ERR(st);
1003
1004 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
1005 generic_fillattr(dentry->d_inode, stat);
1006
1007 p9stat_free(st);
1008 kfree(st);
1009 return 0;
1010 }
1011
1012 /**
1013 * v9fs_vfs_setattr - set file metadata
1014 * @dentry: file whose metadata to set
1015 * @iattr: metadata assignment structure
1016 *
1017 */
1018
1019 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
1020 {
1021 int retval;
1022 struct v9fs_session_info *v9ses;
1023 struct p9_fid *fid;
1024 struct p9_wstat wstat;
1025
1026 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1027 retval = inode_change_ok(dentry->d_inode, iattr);
1028 if (retval)
1029 return retval;
1030
1031 retval = -EPERM;
1032 v9ses = v9fs_dentry2v9ses(dentry);
1033 fid = v9fs_fid_lookup(dentry);
1034 if(IS_ERR(fid))
1035 return PTR_ERR(fid);
1036
1037 v9fs_blank_wstat(&wstat);
1038 if (iattr->ia_valid & ATTR_MODE)
1039 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
1040
1041 if (iattr->ia_valid & ATTR_MTIME)
1042 wstat.mtime = iattr->ia_mtime.tv_sec;
1043
1044 if (iattr->ia_valid & ATTR_ATIME)
1045 wstat.atime = iattr->ia_atime.tv_sec;
1046
1047 if (iattr->ia_valid & ATTR_SIZE)
1048 wstat.length = iattr->ia_size;
1049
1050 if (v9fs_proto_dotu(v9ses)) {
1051 if (iattr->ia_valid & ATTR_UID)
1052 wstat.n_uid = iattr->ia_uid;
1053
1054 if (iattr->ia_valid & ATTR_GID)
1055 wstat.n_gid = iattr->ia_gid;
1056 }
1057
1058 /* Write all dirty data */
1059 if (S_ISREG(dentry->d_inode->i_mode))
1060 filemap_write_and_wait(dentry->d_inode->i_mapping);
1061
1062 retval = p9_client_wstat(fid, &wstat);
1063 if (retval < 0)
1064 return retval;
1065
1066 if ((iattr->ia_valid & ATTR_SIZE) &&
1067 iattr->ia_size != i_size_read(dentry->d_inode))
1068 truncate_setsize(dentry->d_inode, iattr->ia_size);
1069
1070 v9fs_invalidate_inode_attr(dentry->d_inode);
1071
1072 setattr_copy(dentry->d_inode, iattr);
1073 mark_inode_dirty(dentry->d_inode);
1074 return 0;
1075 }
1076
1077 /**
1078 * v9fs_stat2inode - populate an inode structure with mistat info
1079 * @stat: Plan 9 metadata (mistat) structure
1080 * @inode: inode to populate
1081 * @sb: superblock of filesystem
1082 *
1083 */
1084
1085 void
1086 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
1087 struct super_block *sb)
1088 {
1089 char ext[32];
1090 char tag_name[14];
1091 unsigned int i_nlink;
1092 struct v9fs_session_info *v9ses = sb->s_fs_info;
1093 struct v9fs_inode *v9inode = V9FS_I(inode);
1094
1095 inode->i_nlink = 1;
1096
1097 inode->i_atime.tv_sec = stat->atime;
1098 inode->i_mtime.tv_sec = stat->mtime;
1099 inode->i_ctime.tv_sec = stat->mtime;
1100
1101 inode->i_uid = v9ses->dfltuid;
1102 inode->i_gid = v9ses->dfltgid;
1103
1104 if (v9fs_proto_dotu(v9ses)) {
1105 inode->i_uid = stat->n_uid;
1106 inode->i_gid = stat->n_gid;
1107 }
1108 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
1109 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
1110 /*
1111 * Hadlink support got added later to
1112 * to the .u extension. So there can be
1113 * server out there that doesn't support
1114 * this even with .u extension. So check
1115 * for non NULL stat->extension
1116 */
1117 strncpy(ext, stat->extension, sizeof(ext));
1118 /* HARDLINKCOUNT %u */
1119 sscanf(ext, "%13s %u", tag_name, &i_nlink);
1120 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
1121 inode->i_nlink = i_nlink;
1122 }
1123 }
1124 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
1125 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
1126 char type = 0;
1127 int major = -1;
1128 int minor = -1;
1129
1130 strncpy(ext, stat->extension, sizeof(ext));
1131 sscanf(ext, "%c %u %u", &type, &major, &minor);
1132 switch (type) {
1133 case 'c':
1134 inode->i_mode &= ~S_IFBLK;
1135 inode->i_mode |= S_IFCHR;
1136 break;
1137 case 'b':
1138 break;
1139 default:
1140 P9_DPRINTK(P9_DEBUG_ERROR,
1141 "Unknown special type %c %s\n", type,
1142 stat->extension);
1143 };
1144 inode->i_rdev = MKDEV(major, minor);
1145 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1146 } else
1147 inode->i_rdev = 0;
1148
1149 i_size_write(inode, stat->length);
1150
1151 /* not real number of blocks, but 512 byte ones ... */
1152 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
1153 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
1154 }
1155
1156 /**
1157 * v9fs_qid2ino - convert qid into inode number
1158 * @qid: qid to hash
1159 *
1160 * BUG: potential for inode number collisions?
1161 */
1162
1163 ino_t v9fs_qid2ino(struct p9_qid *qid)
1164 {
1165 u64 path = qid->path + 2;
1166 ino_t i = 0;
1167
1168 if (sizeof(ino_t) == sizeof(path))
1169 memcpy(&i, &path, sizeof(ino_t));
1170 else
1171 i = (ino_t) (path ^ (path >> 32));
1172
1173 return i;
1174 }
1175
1176 /**
1177 * v9fs_readlink - read a symlink's location (internal version)
1178 * @dentry: dentry for symlink
1179 * @buffer: buffer to load symlink location into
1180 * @buflen: length of buffer
1181 *
1182 */
1183
1184 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1185 {
1186 int retval;
1187
1188 struct v9fs_session_info *v9ses;
1189 struct p9_fid *fid;
1190 struct p9_wstat *st;
1191
1192 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
1193 retval = -EPERM;
1194 v9ses = v9fs_dentry2v9ses(dentry);
1195 fid = v9fs_fid_lookup(dentry);
1196 if (IS_ERR(fid))
1197 return PTR_ERR(fid);
1198
1199 if (!v9fs_proto_dotu(v9ses))
1200 return -EBADF;
1201
1202 st = p9_client_stat(fid);
1203 if (IS_ERR(st))
1204 return PTR_ERR(st);
1205
1206 if (!(st->mode & P9_DMSYMLINK)) {
1207 retval = -EINVAL;
1208 goto done;
1209 }
1210
1211 /* copy extension buffer into buffer */
1212 strncpy(buffer, st->extension, buflen);
1213
1214 P9_DPRINTK(P9_DEBUG_VFS,
1215 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
1216
1217 retval = strnlen(buffer, buflen);
1218 done:
1219 p9stat_free(st);
1220 kfree(st);
1221 return retval;
1222 }
1223
1224 /**
1225 * v9fs_vfs_follow_link - follow a symlink path
1226 * @dentry: dentry for symlink
1227 * @nd: nameidata
1228 *
1229 */
1230
1231 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1232 {
1233 int len = 0;
1234 char *link = __getname();
1235
1236 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1237
1238 if (!link)
1239 link = ERR_PTR(-ENOMEM);
1240 else {
1241 len = v9fs_readlink(dentry, link, PATH_MAX);
1242
1243 if (len < 0) {
1244 __putname(link);
1245 link = ERR_PTR(len);
1246 } else
1247 link[min(len, PATH_MAX-1)] = 0;
1248 }
1249 nd_set_link(nd, link);
1250
1251 return NULL;
1252 }
1253
1254 /**
1255 * v9fs_vfs_put_link - release a symlink path
1256 * @dentry: dentry for symlink
1257 * @nd: nameidata
1258 * @p: unused
1259 *
1260 */
1261
1262 void
1263 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1264 {
1265 char *s = nd_get_link(nd);
1266
1267 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1268 IS_ERR(s) ? "<error>" : s);
1269 if (!IS_ERR(s))
1270 __putname(s);
1271 }
1272
1273 /**
1274 * v9fs_vfs_mkspecial - create a special file
1275 * @dir: inode to create special file in
1276 * @dentry: dentry to create
1277 * @mode: mode to create special file
1278 * @extension: 9p2000.u format extension string representing special file
1279 *
1280 */
1281
1282 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1283 int mode, const char *extension)
1284 {
1285 u32 perm;
1286 struct p9_fid *fid;
1287 struct v9fs_session_info *v9ses;
1288
1289 v9ses = v9fs_inode2v9ses(dir);
1290 if (!v9fs_proto_dotu(v9ses)) {
1291 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1292 return -EPERM;
1293 }
1294
1295 perm = unixmode2p9mode(v9ses, mode);
1296 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1297 P9_OREAD);
1298 if (IS_ERR(fid))
1299 return PTR_ERR(fid);
1300
1301 v9fs_invalidate_inode_attr(dir);
1302 p9_client_clunk(fid);
1303 return 0;
1304 }
1305
1306 /**
1307 * v9fs_vfs_symlink - helper function to create symlinks
1308 * @dir: directory inode containing symlink
1309 * @dentry: dentry for symlink
1310 * @symname: symlink data
1311 *
1312 * See Also: 9P2000.u RFC for more information
1313 *
1314 */
1315
1316 static int
1317 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1318 {
1319 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1320 dentry->d_name.name, symname);
1321
1322 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1323 }
1324
1325 /**
1326 * v9fs_vfs_link - create a hardlink
1327 * @old_dentry: dentry for file to link to
1328 * @dir: inode destination for new link
1329 * @dentry: dentry for link
1330 *
1331 */
1332
1333 static int
1334 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1335 struct dentry *dentry)
1336 {
1337 int retval;
1338 char *name;
1339 struct p9_fid *oldfid;
1340
1341 P9_DPRINTK(P9_DEBUG_VFS,
1342 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1343 old_dentry->d_name.name);
1344
1345 oldfid = v9fs_fid_clone(old_dentry);
1346 if (IS_ERR(oldfid))
1347 return PTR_ERR(oldfid);
1348
1349 name = __getname();
1350 if (unlikely(!name)) {
1351 retval = -ENOMEM;
1352 goto clunk_fid;
1353 }
1354
1355 sprintf(name, "%d\n", oldfid->fid);
1356 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1357 __putname(name);
1358 if (!retval) {
1359 v9fs_refresh_inode(oldfid, old_dentry->d_inode);
1360 v9fs_invalidate_inode_attr(dir);
1361 }
1362 clunk_fid:
1363 p9_client_clunk(oldfid);
1364 return retval;
1365 }
1366
1367 /**
1368 * v9fs_vfs_mknod - create a special file
1369 * @dir: inode destination for new link
1370 * @dentry: dentry for file
1371 * @mode: mode for creation
1372 * @rdev: device associated with special file
1373 *
1374 */
1375
1376 static int
1377 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1378 {
1379 int retval;
1380 char *name;
1381
1382 P9_DPRINTK(P9_DEBUG_VFS,
1383 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1384 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1385
1386 if (!new_valid_dev(rdev))
1387 return -EINVAL;
1388
1389 name = __getname();
1390 if (!name)
1391 return -ENOMEM;
1392 /* build extension */
1393 if (S_ISBLK(mode))
1394 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1395 else if (S_ISCHR(mode))
1396 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1397 else if (S_ISFIFO(mode))
1398 *name = 0;
1399 else if (S_ISSOCK(mode))
1400 *name = 0;
1401 else {
1402 __putname(name);
1403 return -EINVAL;
1404 }
1405
1406 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1407 __putname(name);
1408
1409 return retval;
1410 }
1411
1412 int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
1413 {
1414 loff_t i_size;
1415 struct p9_wstat *st;
1416 struct v9fs_session_info *v9ses;
1417
1418 v9ses = v9fs_inode2v9ses(inode);
1419 st = p9_client_stat(fid);
1420 if (IS_ERR(st))
1421 return PTR_ERR(st);
1422
1423 spin_lock(&inode->i_lock);
1424 /*
1425 * We don't want to refresh inode->i_size,
1426 * because we may have cached data
1427 */
1428 i_size = inode->i_size;
1429 v9fs_stat2inode(st, inode, inode->i_sb);
1430 if (v9ses->cache)
1431 inode->i_size = i_size;
1432 spin_unlock(&inode->i_lock);
1433 p9stat_free(st);
1434 kfree(st);
1435 return 0;
1436 }
1437
1438 static const struct inode_operations v9fs_dir_inode_operations_dotu = {
1439 .create = v9fs_vfs_create,
1440 .lookup = v9fs_vfs_lookup,
1441 .symlink = v9fs_vfs_symlink,
1442 .link = v9fs_vfs_link,
1443 .unlink = v9fs_vfs_unlink,
1444 .mkdir = v9fs_vfs_mkdir,
1445 .rmdir = v9fs_vfs_rmdir,
1446 .mknod = v9fs_vfs_mknod,
1447 .rename = v9fs_vfs_rename,
1448 .getattr = v9fs_vfs_getattr,
1449 .setattr = v9fs_vfs_setattr,
1450 };
1451
1452 static const struct inode_operations v9fs_dir_inode_operations = {
1453 .create = v9fs_vfs_create,
1454 .lookup = v9fs_vfs_lookup,
1455 .unlink = v9fs_vfs_unlink,
1456 .mkdir = v9fs_vfs_mkdir,
1457 .rmdir = v9fs_vfs_rmdir,
1458 .mknod = v9fs_vfs_mknod,
1459 .rename = v9fs_vfs_rename,
1460 .getattr = v9fs_vfs_getattr,
1461 .setattr = v9fs_vfs_setattr,
1462 };
1463
1464 static const struct inode_operations v9fs_file_inode_operations = {
1465 .getattr = v9fs_vfs_getattr,
1466 .setattr = v9fs_vfs_setattr,
1467 };
1468
1469 static const struct inode_operations v9fs_symlink_inode_operations = {
1470 .readlink = generic_readlink,
1471 .follow_link = v9fs_vfs_follow_link,
1472 .put_link = v9fs_vfs_put_link,
1473 .getattr = v9fs_vfs_getattr,
1474 .setattr = v9fs_vfs_setattr,
1475 };
1476
Linux Btrfs Development