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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / 9p / vfs_inode.c
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_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;
57
58 static int
59 v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
60 dev_t rdev);
61
62 /**
63 * unixmode2p9mode - convert unix mode bits to plan 9
64 * @v9ses: v9fs session information
65 * @mode: mode to convert
66 *
67 */
68
69 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
70 {
71 int res;
72 res = mode & 0777;
73 if (S_ISDIR(mode))
74 res |= P9_DMDIR;
75 if (v9fs_proto_dotu(v9ses)) {
76 if (S_ISLNK(mode))
77 res |= P9_DMSYMLINK;
78 if (v9ses->nodev == 0) {
79 if (S_ISSOCK(mode))
80 res |= P9_DMSOCKET;
81 if (S_ISFIFO(mode))
82 res |= P9_DMNAMEDPIPE;
83 if (S_ISBLK(mode))
84 res |= P9_DMDEVICE;
85 if (S_ISCHR(mode))
86 res |= P9_DMDEVICE;
87 }
88
89 if ((mode & S_ISUID) == S_ISUID)
90 res |= P9_DMSETUID;
91 if ((mode & S_ISGID) == S_ISGID)
92 res |= P9_DMSETGID;
93 if ((mode & S_ISVTX) == S_ISVTX)
94 res |= P9_DMSETVTX;
95 if ((mode & P9_DMLINK))
96 res |= P9_DMLINK;
97 }
98
99 return res;
100 }
101
102 /**
103 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
104 * @v9ses: v9fs session information
105 * @mode: mode to convert
106 *
107 */
108
109 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
110 {
111 int res;
112
113 res = mode & 0777;
114
115 if ((mode & P9_DMDIR) == P9_DMDIR)
116 res |= S_IFDIR;
117 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
118 res |= S_IFLNK;
119 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
120 && (v9ses->nodev == 0))
121 res |= S_IFSOCK;
122 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
123 && (v9ses->nodev == 0))
124 res |= S_IFIFO;
125 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
126 && (v9ses->nodev == 0))
127 res |= S_IFBLK;
128 else
129 res |= S_IFREG;
130
131 if (v9fs_proto_dotu(v9ses)) {
132 if ((mode & P9_DMSETUID) == P9_DMSETUID)
133 res |= S_ISUID;
134
135 if ((mode & P9_DMSETGID) == P9_DMSETGID)
136 res |= S_ISGID;
137
138 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
139 res |= S_ISVTX;
140 }
141
142 return res;
143 }
144
145 /**
146 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
147 * @uflags: flags to convert
148 * @extended: if .u extensions are active
149 */
150
151 int v9fs_uflags2omode(int uflags, int extended)
152 {
153 int ret;
154
155 ret = 0;
156 switch (uflags&3) {
157 default:
158 case O_RDONLY:
159 ret = P9_OREAD;
160 break;
161
162 case O_WRONLY:
163 ret = P9_OWRITE;
164 break;
165
166 case O_RDWR:
167 ret = P9_ORDWR;
168 break;
169 }
170
171 if (uflags & O_TRUNC)
172 ret |= P9_OTRUNC;
173
174 if (extended) {
175 if (uflags & O_EXCL)
176 ret |= P9_OEXCL;
177
178 if (uflags & O_APPEND)
179 ret |= P9_OAPPEND;
180 }
181
182 return ret;
183 }
184
185 /**
186 * v9fs_blank_wstat - helper function to setup a 9P stat structure
187 * @wstat: structure to initialize
188 *
189 */
190
191 void
192 v9fs_blank_wstat(struct p9_wstat *wstat)
193 {
194 wstat->type = ~0;
195 wstat->dev = ~0;
196 wstat->qid.type = ~0;
197 wstat->qid.version = ~0;
198 *((long long *)&wstat->qid.path) = ~0;
199 wstat->mode = ~0;
200 wstat->atime = ~0;
201 wstat->mtime = ~0;
202 wstat->length = ~0;
203 wstat->name = NULL;
204 wstat->uid = NULL;
205 wstat->gid = NULL;
206 wstat->muid = NULL;
207 wstat->n_uid = ~0;
208 wstat->n_gid = ~0;
209 wstat->n_muid = ~0;
210 wstat->extension = NULL;
211 }
212
213 #ifdef CONFIG_9P_FSCACHE
214 /**
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.
218 *
219 */
220
221 struct inode *v9fs_alloc_inode(struct super_block *sb)
222 {
223 struct v9fs_cookie *vcookie;
224 vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache,
225 GFP_KERNEL);
226 if (!vcookie)
227 return NULL;
228
229 vcookie->fscache = NULL;
230 vcookie->qid = NULL;
231 spin_lock_init(&vcookie->lock);
232 return &vcookie->inode;
233 }
234
235 /**
236 * v9fs_destroy_inode - destroy an inode
237 *
238 */
239
240 void v9fs_destroy_inode(struct inode *inode)
241 {
242 kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
243 }
244 #endif
245
246 /**
247 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
248 * new file system object. This checks the S_ISGID to determine the owning
249 * group of the new file system object.
250 */
251
252 static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
253 {
254 BUG_ON(dir_inode == NULL);
255
256 if (dir_inode->i_mode & S_ISGID) {
257 /* set_gid bit is set.*/
258 return dir_inode->i_gid;
259 }
260 return current_fsgid();
261 }
262
263 /**
264 * v9fs_dentry_from_dir_inode - helper function to get the dentry from
265 * dir inode.
266 *
267 */
268
269 static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
270 {
271 struct dentry *dentry;
272
273 spin_lock(&dcache_inode_lock);
274 /* Directory should have only one entry. */
275 BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
276 dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
277 spin_unlock(&dcache_inode_lock);
278 return dentry;
279 }
280
281 /**
282 * v9fs_get_inode - helper function to setup an inode
283 * @sb: superblock
284 * @mode: mode to setup inode with
285 *
286 */
287
288 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
289 {
290 int err;
291 struct inode *inode;
292 struct v9fs_session_info *v9ses = sb->s_fs_info;
293
294 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
295
296 inode = new_inode(sb);
297 if (!inode) {
298 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
299 return ERR_PTR(-ENOMEM);
300 }
301
302 inode_init_owner(inode, NULL, mode);
303 inode->i_blocks = 0;
304 inode->i_rdev = 0;
305 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
306 inode->i_mapping->a_ops = &v9fs_addr_operations;
307
308 switch (mode & S_IFMT) {
309 case S_IFIFO:
310 case S_IFBLK:
311 case S_IFCHR:
312 case S_IFSOCK:
313 if (v9fs_proto_dotl(v9ses)) {
314 inode->i_op = &v9fs_file_inode_operations_dotl;
315 inode->i_fop = &v9fs_file_operations_dotl;
316 } else if (v9fs_proto_dotu(v9ses)) {
317 inode->i_op = &v9fs_file_inode_operations;
318 inode->i_fop = &v9fs_file_operations;
319 } else {
320 P9_DPRINTK(P9_DEBUG_ERROR,
321 "special files without extended mode\n");
322 err = -EINVAL;
323 goto error;
324 }
325 init_special_inode(inode, inode->i_mode, inode->i_rdev);
326 break;
327 case S_IFREG:
328 if (v9fs_proto_dotl(v9ses)) {
329 inode->i_op = &v9fs_file_inode_operations_dotl;
330 inode->i_fop = &v9fs_file_operations_dotl;
331 } else {
332 inode->i_op = &v9fs_file_inode_operations;
333 inode->i_fop = &v9fs_file_operations;
334 }
335
336 break;
337
338 case S_IFLNK:
339 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
340 P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
341 "legacy protocol.\n");
342 err = -EINVAL;
343 goto error;
344 }
345
346 if (v9fs_proto_dotl(v9ses))
347 inode->i_op = &v9fs_symlink_inode_operations_dotl;
348 else
349 inode->i_op = &v9fs_symlink_inode_operations;
350
351 break;
352 case S_IFDIR:
353 inc_nlink(inode);
354 if (v9fs_proto_dotl(v9ses))
355 inode->i_op = &v9fs_dir_inode_operations_dotl;
356 else if (v9fs_proto_dotu(v9ses))
357 inode->i_op = &v9fs_dir_inode_operations_dotu;
358 else
359 inode->i_op = &v9fs_dir_inode_operations;
360
361 if (v9fs_proto_dotl(v9ses))
362 inode->i_fop = &v9fs_dir_operations_dotl;
363 else
364 inode->i_fop = &v9fs_dir_operations;
365
366 break;
367 default:
368 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
369 mode, mode & S_IFMT);
370 err = -EINVAL;
371 goto error;
372 }
373
374 return inode;
375
376 error:
377 iput(inode);
378 return ERR_PTR(err);
379 }
380
381 /*
382 static struct v9fs_fid*
383 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
384 {
385 int err;
386 int nfid;
387 struct v9fs_fid *ret;
388 struct v9fs_fcall *fcall;
389
390 nfid = v9fs_get_idpool(&v9ses->fidpool);
391 if (nfid < 0) {
392 eprintk(KERN_WARNING, "no free fids available\n");
393 return ERR_PTR(-ENOSPC);
394 }
395
396 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
397 &fcall);
398
399 if (err < 0) {
400 if (fcall && fcall->id == RWALK)
401 goto clunk_fid;
402
403 PRINT_FCALL_ERROR("walk error", fcall);
404 v9fs_put_idpool(nfid, &v9ses->fidpool);
405 goto error;
406 }
407
408 kfree(fcall);
409 fcall = NULL;
410 ret = v9fs_fid_create(v9ses, nfid);
411 if (!ret) {
412 err = -ENOMEM;
413 goto clunk_fid;
414 }
415
416 err = v9fs_fid_insert(ret, dentry);
417 if (err < 0) {
418 v9fs_fid_destroy(ret);
419 goto clunk_fid;
420 }
421
422 return ret;
423
424 clunk_fid:
425 v9fs_t_clunk(v9ses, nfid);
426
427 error:
428 kfree(fcall);
429 return ERR_PTR(err);
430 }
431 */
432
433
434 /**
435 * v9fs_clear_inode - release an inode
436 * @inode: inode to release
437 *
438 */
439 void v9fs_evict_inode(struct inode *inode)
440 {
441 truncate_inode_pages(inode->i_mapping, 0);
442 end_writeback(inode);
443 filemap_fdatawrite(inode->i_mapping);
444
445 #ifdef CONFIG_9P_FSCACHE
446 v9fs_cache_inode_put_cookie(inode);
447 #endif
448 }
449
450 static struct inode *
451 v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid,
452 struct super_block *sb)
453 {
454 int err, umode;
455 struct inode *ret = NULL;
456 struct p9_wstat *st;
457
458 st = p9_client_stat(fid);
459 if (IS_ERR(st))
460 return ERR_CAST(st);
461
462 umode = p9mode2unixmode(v9ses, st->mode);
463 ret = v9fs_get_inode(sb, umode);
464 if (IS_ERR(ret)) {
465 err = PTR_ERR(ret);
466 goto error;
467 }
468
469 v9fs_stat2inode(st, ret, sb);
470 ret->i_ino = v9fs_qid2ino(&st->qid);
471
472 #ifdef CONFIG_9P_FSCACHE
473 v9fs_vcookie_set_qid(ret, &st->qid);
474 v9fs_cache_inode_get_cookie(ret);
475 #endif
476 p9stat_free(st);
477 kfree(st);
478 return ret;
479 error:
480 p9stat_free(st);
481 kfree(st);
482 return ERR_PTR(err);
483 }
484
485 static struct inode *
486 v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
487 struct super_block *sb)
488 {
489 struct inode *ret = NULL;
490 int err;
491 struct p9_stat_dotl *st;
492
493 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
494 if (IS_ERR(st))
495 return ERR_CAST(st);
496
497 ret = v9fs_get_inode(sb, st->st_mode);
498 if (IS_ERR(ret)) {
499 err = PTR_ERR(ret);
500 goto error;
501 }
502
503 v9fs_stat2inode_dotl(st, ret);
504 ret->i_ino = v9fs_qid2ino(&st->qid);
505 #ifdef CONFIG_9P_FSCACHE
506 v9fs_vcookie_set_qid(ret, &st->qid);
507 v9fs_cache_inode_get_cookie(ret);
508 #endif
509 err = v9fs_get_acl(ret, fid);
510 if (err) {
511 iput(ret);
512 goto error;
513 }
514 kfree(st);
515 return ret;
516 error:
517 kfree(st);
518 return ERR_PTR(err);
519 }
520
521 /**
522 * v9fs_inode_from_fid - Helper routine to populate an inode by
523 * issuing a attribute request
524 * @v9ses: session information
525 * @fid: fid to issue attribute request for
526 * @sb: superblock on which to create inode
527 *
528 */
529 static inline struct inode *
530 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
531 struct super_block *sb)
532 {
533 if (v9fs_proto_dotl(v9ses))
534 return v9fs_inode_dotl(v9ses, fid, sb);
535 else
536 return v9fs_inode(v9ses, fid, sb);
537 }
538
539 /**
540 * v9fs_remove - helper function to remove files and directories
541 * @dir: directory inode that is being deleted
542 * @file: dentry that is being deleted
543 * @rmdir: removing a directory
544 *
545 */
546
547 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
548 {
549 int retval;
550 struct inode *file_inode;
551 struct p9_fid *v9fid;
552
553 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
554 rmdir);
555
556 file_inode = file->d_inode;
557 v9fid = v9fs_fid_clone(file);
558 if (IS_ERR(v9fid))
559 return PTR_ERR(v9fid);
560
561 retval = p9_client_remove(v9fid);
562 if (!retval)
563 drop_nlink(file_inode);
564 return retval;
565 }
566
567 /**
568 * v9fs_create - Create a file
569 * @v9ses: session information
570 * @dir: directory that dentry is being created in
571 * @dentry: dentry that is being created
572 * @extension: 9p2000.u extension string to support devices, etc.
573 * @perm: create permissions
574 * @mode: open mode
575 *
576 */
577 static struct p9_fid *
578 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
579 struct dentry *dentry, char *extension, u32 perm, u8 mode)
580 {
581 int err;
582 char *name;
583 struct p9_fid *dfid, *ofid, *fid;
584 struct inode *inode;
585
586 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
587
588 err = 0;
589 ofid = NULL;
590 fid = NULL;
591 name = (char *) dentry->d_name.name;
592 dfid = v9fs_fid_lookup(dentry->d_parent);
593 if (IS_ERR(dfid)) {
594 err = PTR_ERR(dfid);
595 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
596 return ERR_PTR(err);
597 }
598
599 /* clone a fid to use for creation */
600 ofid = p9_client_walk(dfid, 0, NULL, 1);
601 if (IS_ERR(ofid)) {
602 err = PTR_ERR(ofid);
603 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
604 return ERR_PTR(err);
605 }
606
607 err = p9_client_fcreate(ofid, name, perm, mode, extension);
608 if (err < 0) {
609 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
610 goto error;
611 }
612
613 /* now walk from the parent so we can get unopened fid */
614 fid = p9_client_walk(dfid, 1, &name, 1);
615 if (IS_ERR(fid)) {
616 err = PTR_ERR(fid);
617 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
618 fid = NULL;
619 goto error;
620 }
621
622 /* instantiate inode and assign the unopened fid to the dentry */
623 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
624 if (IS_ERR(inode)) {
625 err = PTR_ERR(inode);
626 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
627 goto error;
628 }
629
630 if (v9ses->cache)
631 dentry->d_op = &v9fs_cached_dentry_operations;
632 else
633 dentry->d_op = &v9fs_dentry_operations;
634
635 d_instantiate(dentry, inode);
636 err = v9fs_fid_add(dentry, fid);
637 if (err < 0)
638 goto error;
639
640 return ofid;
641
642 error:
643 if (ofid)
644 p9_client_clunk(ofid);
645
646 if (fid)
647 p9_client_clunk(fid);
648
649 return ERR_PTR(err);
650 }
651
652 /**
653 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
654 * @dir: directory inode that is being created
655 * @dentry: dentry that is being deleted
656 * @mode: create permissions
657 * @nd: path information
658 *
659 */
660
661 static int
662 v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
663 struct nameidata *nd)
664 {
665 int err = 0;
666 char *name = NULL;
667 gid_t gid;
668 int flags;
669 mode_t mode;
670 struct v9fs_session_info *v9ses;
671 struct p9_fid *fid = NULL;
672 struct p9_fid *dfid, *ofid;
673 struct file *filp;
674 struct p9_qid qid;
675 struct inode *inode;
676 struct posix_acl *pacl = NULL, *dacl = NULL;
677
678 v9ses = v9fs_inode2v9ses(dir);
679 if (nd && nd->flags & LOOKUP_OPEN)
680 flags = nd->intent.open.flags - 1;
681 else {
682 /*
683 * create call without LOOKUP_OPEN is due
684 * to mknod of regular files. So use mknod
685 * operation.
686 */
687 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
688 }
689
690 name = (char *) dentry->d_name.name;
691 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
692 "mode:0x%x\n", name, flags, omode);
693
694 dfid = v9fs_fid_lookup(dentry->d_parent);
695 if (IS_ERR(dfid)) {
696 err = PTR_ERR(dfid);
697 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
698 return err;
699 }
700
701 /* clone a fid to use for creation */
702 ofid = p9_client_walk(dfid, 0, NULL, 1);
703 if (IS_ERR(ofid)) {
704 err = PTR_ERR(ofid);
705 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
706 return err;
707 }
708
709 gid = v9fs_get_fsgid_for_create(dir);
710
711 mode = omode;
712 /* Update mode based on ACL value */
713 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
714 if (err) {
715 P9_DPRINTK(P9_DEBUG_VFS,
716 "Failed to get acl values in creat %d\n", err);
717 goto error;
718 }
719 err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
720 if (err < 0) {
721 P9_DPRINTK(P9_DEBUG_VFS,
722 "p9_client_open_dotl failed in creat %d\n",
723 err);
724 goto error;
725 }
726 /* instantiate inode and assign the unopened fid to the dentry */
727 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE ||
728 (nd && nd->flags & LOOKUP_OPEN)) {
729 fid = p9_client_walk(dfid, 1, &name, 1);
730 if (IS_ERR(fid)) {
731 err = PTR_ERR(fid);
732 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
733 err);
734 fid = NULL;
735 goto error;
736 }
737
738 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
739 if (IS_ERR(inode)) {
740 err = PTR_ERR(inode);
741 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
742 err);
743 goto error;
744 }
745 dentry->d_op = &v9fs_cached_dentry_operations;
746 d_instantiate(dentry, inode);
747 err = v9fs_fid_add(dentry, fid);
748 if (err < 0)
749 goto error;
750 /* The fid would get clunked via a dput */
751 fid = NULL;
752 } else {
753 /*
754 * Not in cached mode. No need to populate
755 * inode with stat. We need to get an inode
756 * so that we can set the acl with dentry
757 */
758 inode = v9fs_get_inode(dir->i_sb, mode);
759 if (IS_ERR(inode)) {
760 err = PTR_ERR(inode);
761 goto error;
762 }
763 dentry->d_op = &v9fs_dentry_operations;
764 d_instantiate(dentry, inode);
765 }
766 /* Now set the ACL based on the default value */
767 v9fs_set_create_acl(dentry, dacl, pacl);
768
769 /* if we are opening a file, assign the open fid to the file */
770 if (nd && nd->flags & LOOKUP_OPEN) {
771 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
772 if (IS_ERR(filp)) {
773 p9_client_clunk(ofid);
774 return PTR_ERR(filp);
775 }
776 filp->private_data = ofid;
777 } else
778 p9_client_clunk(ofid);
779
780 return 0;
781
782 error:
783 if (ofid)
784 p9_client_clunk(ofid);
785 if (fid)
786 p9_client_clunk(fid);
787 return err;
788 }
789
790 /**
791 * v9fs_vfs_create - VFS hook to create files
792 * @dir: directory inode that is being created
793 * @dentry: dentry that is being deleted
794 * @mode: create permissions
795 * @nd: path information
796 *
797 */
798
799 static int
800 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
801 struct nameidata *nd)
802 {
803 int err;
804 u32 perm;
805 int flags;
806 struct v9fs_session_info *v9ses;
807 struct p9_fid *fid;
808 struct file *filp;
809
810 err = 0;
811 fid = NULL;
812 v9ses = v9fs_inode2v9ses(dir);
813 perm = unixmode2p9mode(v9ses, mode);
814 if (nd && nd->flags & LOOKUP_OPEN)
815 flags = nd->intent.open.flags - 1;
816 else
817 flags = O_RDWR;
818
819 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
820 v9fs_uflags2omode(flags,
821 v9fs_proto_dotu(v9ses)));
822 if (IS_ERR(fid)) {
823 err = PTR_ERR(fid);
824 fid = NULL;
825 goto error;
826 }
827
828 /* if we are opening a file, assign the open fid to the file */
829 if (nd && nd->flags & LOOKUP_OPEN) {
830 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
831 if (IS_ERR(filp)) {
832 err = PTR_ERR(filp);
833 goto error;
834 }
835
836 filp->private_data = fid;
837 } else
838 p9_client_clunk(fid);
839
840 return 0;
841
842 error:
843 if (fid)
844 p9_client_clunk(fid);
845
846 return err;
847 }
848
849 /**
850 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
851 * @dir: inode that is being unlinked
852 * @dentry: dentry that is being unlinked
853 * @mode: mode for new directory
854 *
855 */
856
857 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
858 {
859 int err;
860 u32 perm;
861 struct v9fs_session_info *v9ses;
862 struct p9_fid *fid;
863
864 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
865 err = 0;
866 v9ses = v9fs_inode2v9ses(dir);
867 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
868 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
869 if (IS_ERR(fid)) {
870 err = PTR_ERR(fid);
871 fid = NULL;
872 }
873
874 if (fid)
875 p9_client_clunk(fid);
876
877 return err;
878 }
879
880
881 /**
882 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
883 * @dir: inode that is being unlinked
884 * @dentry: dentry that is being unlinked
885 * @mode: mode for new directory
886 *
887 */
888
889 static int v9fs_vfs_mkdir_dotl(struct inode *dir,
890 struct dentry *dentry, int omode)
891 {
892 int err;
893 struct v9fs_session_info *v9ses;
894 struct p9_fid *fid = NULL, *dfid = NULL;
895 gid_t gid;
896 char *name;
897 mode_t mode;
898 struct inode *inode;
899 struct p9_qid qid;
900 struct dentry *dir_dentry;
901 struct posix_acl *dacl = NULL, *pacl = NULL;
902
903 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
904 err = 0;
905 v9ses = v9fs_inode2v9ses(dir);
906
907 omode |= S_IFDIR;
908 if (dir->i_mode & S_ISGID)
909 omode |= S_ISGID;
910
911 dir_dentry = v9fs_dentry_from_dir_inode(dir);
912 dfid = v9fs_fid_lookup(dir_dentry);
913 if (IS_ERR(dfid)) {
914 err = PTR_ERR(dfid);
915 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
916 dfid = NULL;
917 goto error;
918 }
919
920 gid = v9fs_get_fsgid_for_create(dir);
921 mode = omode;
922 /* Update mode based on ACL value */
923 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
924 if (err) {
925 P9_DPRINTK(P9_DEBUG_VFS,
926 "Failed to get acl values in mkdir %d\n", err);
927 goto error;
928 }
929 name = (char *) dentry->d_name.name;
930 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
931 if (err < 0)
932 goto error;
933
934 /* instantiate inode and assign the unopened fid to the dentry */
935 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
936 fid = p9_client_walk(dfid, 1, &name, 1);
937 if (IS_ERR(fid)) {
938 err = PTR_ERR(fid);
939 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
940 err);
941 fid = NULL;
942 goto error;
943 }
944
945 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
946 if (IS_ERR(inode)) {
947 err = PTR_ERR(inode);
948 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
949 err);
950 goto error;
951 }
952 dentry->d_op = &v9fs_cached_dentry_operations;
953 d_instantiate(dentry, inode);
954 err = v9fs_fid_add(dentry, fid);
955 if (err < 0)
956 goto error;
957 fid = NULL;
958 } else {
959 /*
960 * Not in cached mode. No need to populate
961 * inode with stat. We need to get an inode
962 * so that we can set the acl with dentry
963 */
964 inode = v9fs_get_inode(dir->i_sb, mode);
965 if (IS_ERR(inode)) {
966 err = PTR_ERR(inode);
967 goto error;
968 }
969 dentry->d_op = &v9fs_dentry_operations;
970 d_instantiate(dentry, inode);
971 }
972 /* Now set the ACL based on the default value */
973 v9fs_set_create_acl(dentry, dacl, pacl);
974
975 error:
976 if (fid)
977 p9_client_clunk(fid);
978 return err;
979 }
980
981 /**
982 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
983 * @dir: inode that is being walked from
984 * @dentry: dentry that is being walked to?
985 * @nameidata: path data
986 *
987 */
988
989 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
990 struct nameidata *nameidata)
991 {
992 struct super_block *sb;
993 struct v9fs_session_info *v9ses;
994 struct p9_fid *dfid, *fid;
995 struct inode *inode;
996 char *name;
997 int result = 0;
998
999 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
1000 dir, dentry->d_name.name, dentry, nameidata);
1001
1002 if (dentry->d_name.len > NAME_MAX)
1003 return ERR_PTR(-ENAMETOOLONG);
1004
1005 sb = dir->i_sb;
1006 v9ses = v9fs_inode2v9ses(dir);
1007 /* We can walk d_parent because we hold the dir->i_mutex */
1008 dfid = v9fs_fid_lookup(dentry->d_parent);
1009 if (IS_ERR(dfid))
1010 return ERR_CAST(dfid);
1011
1012 name = (char *) dentry->d_name.name;
1013 fid = p9_client_walk(dfid, 1, &name, 1);
1014 if (IS_ERR(fid)) {
1015 result = PTR_ERR(fid);
1016 if (result == -ENOENT) {
1017 inode = NULL;
1018 goto inst_out;
1019 }
1020
1021 return ERR_PTR(result);
1022 }
1023
1024 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1025 if (IS_ERR(inode)) {
1026 result = PTR_ERR(inode);
1027 inode = NULL;
1028 goto error;
1029 }
1030
1031 result = v9fs_fid_add(dentry, fid);
1032 if (result < 0)
1033 goto error_iput;
1034
1035 inst_out:
1036 if (v9ses->cache)
1037 dentry->d_op = &v9fs_cached_dentry_operations;
1038 else
1039 dentry->d_op = &v9fs_dentry_operations;
1040
1041 d_add(dentry, inode);
1042 return NULL;
1043
1044 error_iput:
1045 iput(inode);
1046 error:
1047 p9_client_clunk(fid);
1048
1049 return ERR_PTR(result);
1050 }
1051
1052 /**
1053 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
1054 * @i: inode that is being unlinked
1055 * @d: dentry that is being unlinked
1056 *
1057 */
1058
1059 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
1060 {
1061 return v9fs_remove(i, d, 0);
1062 }
1063
1064 /**
1065 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
1066 * @i: inode that is being unlinked
1067 * @d: dentry that is being unlinked
1068 *
1069 */
1070
1071 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
1072 {
1073 return v9fs_remove(i, d, 1);
1074 }
1075
1076 /**
1077 * v9fs_vfs_rename - VFS hook to rename an inode
1078 * @old_dir: old dir inode
1079 * @old_dentry: old dentry
1080 * @new_dir: new dir inode
1081 * @new_dentry: new dentry
1082 *
1083 */
1084
1085 static int
1086 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
1087 struct inode *new_dir, struct dentry *new_dentry)
1088 {
1089 struct inode *old_inode;
1090 struct v9fs_session_info *v9ses;
1091 struct p9_fid *oldfid;
1092 struct p9_fid *olddirfid;
1093 struct p9_fid *newdirfid;
1094 struct p9_wstat wstat;
1095 int retval;
1096
1097 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1098 retval = 0;
1099 old_inode = old_dentry->d_inode;
1100 v9ses = v9fs_inode2v9ses(old_inode);
1101 oldfid = v9fs_fid_lookup(old_dentry);
1102 if (IS_ERR(oldfid))
1103 return PTR_ERR(oldfid);
1104
1105 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
1106 if (IS_ERR(olddirfid)) {
1107 retval = PTR_ERR(olddirfid);
1108 goto done;
1109 }
1110
1111 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
1112 if (IS_ERR(newdirfid)) {
1113 retval = PTR_ERR(newdirfid);
1114 goto clunk_olddir;
1115 }
1116
1117 down_write(&v9ses->rename_sem);
1118 if (v9fs_proto_dotl(v9ses)) {
1119 retval = p9_client_rename(oldfid, newdirfid,
1120 (char *) new_dentry->d_name.name);
1121 if (retval != -ENOSYS)
1122 goto clunk_newdir;
1123 }
1124 if (old_dentry->d_parent != new_dentry->d_parent) {
1125 /*
1126 * 9P .u can only handle file rename in the same directory
1127 */
1128
1129 P9_DPRINTK(P9_DEBUG_ERROR,
1130 "old dir and new dir are different\n");
1131 retval = -EXDEV;
1132 goto clunk_newdir;
1133 }
1134 v9fs_blank_wstat(&wstat);
1135 wstat.muid = v9ses->uname;
1136 wstat.name = (char *) new_dentry->d_name.name;
1137 retval = p9_client_wstat(oldfid, &wstat);
1138
1139 clunk_newdir:
1140 if (!retval)
1141 /* successful rename */
1142 d_move(old_dentry, new_dentry);
1143 up_write(&v9ses->rename_sem);
1144 p9_client_clunk(newdirfid);
1145
1146 clunk_olddir:
1147 p9_client_clunk(olddirfid);
1148
1149 done:
1150 return retval;
1151 }
1152
1153 /**
1154 * v9fs_vfs_getattr - retrieve file metadata
1155 * @mnt: mount information
1156 * @dentry: file to get attributes on
1157 * @stat: metadata structure to populate
1158 *
1159 */
1160
1161 static int
1162 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1163 struct kstat *stat)
1164 {
1165 int err;
1166 struct v9fs_session_info *v9ses;
1167 struct p9_fid *fid;
1168 struct p9_wstat *st;
1169
1170 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
1171 err = -EPERM;
1172 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1173 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
1174 return simple_getattr(mnt, dentry, stat);
1175
1176 fid = v9fs_fid_lookup(dentry);
1177 if (IS_ERR(fid))
1178 return PTR_ERR(fid);
1179
1180 st = p9_client_stat(fid);
1181 if (IS_ERR(st))
1182 return PTR_ERR(st);
1183
1184 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
1185 generic_fillattr(dentry->d_inode, stat);
1186
1187 p9stat_free(st);
1188 kfree(st);
1189 return 0;
1190 }
1191
1192 static int
1193 v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
1194 struct kstat *stat)
1195 {
1196 int err;
1197 struct v9fs_session_info *v9ses;
1198 struct p9_fid *fid;
1199 struct p9_stat_dotl *st;
1200
1201 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
1202 err = -EPERM;
1203 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1204 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
1205 return simple_getattr(mnt, dentry, stat);
1206
1207 fid = v9fs_fid_lookup(dentry);
1208 if (IS_ERR(fid))
1209 return PTR_ERR(fid);
1210
1211 /* Ask for all the fields in stat structure. Server will return
1212 * whatever it supports
1213 */
1214
1215 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
1216 if (IS_ERR(st))
1217 return PTR_ERR(st);
1218
1219 v9fs_stat2inode_dotl(st, dentry->d_inode);
1220 generic_fillattr(dentry->d_inode, stat);
1221 /* Change block size to what the server returned */
1222 stat->blksize = st->st_blksize;
1223
1224 kfree(st);
1225 return 0;
1226 }
1227
1228 /**
1229 * v9fs_vfs_setattr - set file metadata
1230 * @dentry: file whose metadata to set
1231 * @iattr: metadata assignment structure
1232 *
1233 */
1234
1235 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
1236 {
1237 int retval;
1238 struct v9fs_session_info *v9ses;
1239 struct p9_fid *fid;
1240 struct p9_wstat wstat;
1241
1242 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1243 retval = -EPERM;
1244 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1245 fid = v9fs_fid_lookup(dentry);
1246 if(IS_ERR(fid))
1247 return PTR_ERR(fid);
1248
1249 v9fs_blank_wstat(&wstat);
1250 if (iattr->ia_valid & ATTR_MODE)
1251 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
1252
1253 if (iattr->ia_valid & ATTR_MTIME)
1254 wstat.mtime = iattr->ia_mtime.tv_sec;
1255
1256 if (iattr->ia_valid & ATTR_ATIME)
1257 wstat.atime = iattr->ia_atime.tv_sec;
1258
1259 if (iattr->ia_valid & ATTR_SIZE)
1260 wstat.length = iattr->ia_size;
1261
1262 if (v9fs_proto_dotu(v9ses)) {
1263 if (iattr->ia_valid & ATTR_UID)
1264 wstat.n_uid = iattr->ia_uid;
1265
1266 if (iattr->ia_valid & ATTR_GID)
1267 wstat.n_gid = iattr->ia_gid;
1268 }
1269
1270 retval = p9_client_wstat(fid, &wstat);
1271 if (retval < 0)
1272 return retval;
1273
1274 if ((iattr->ia_valid & ATTR_SIZE) &&
1275 iattr->ia_size != i_size_read(dentry->d_inode)) {
1276 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
1277 if (retval)
1278 return retval;
1279 }
1280
1281 setattr_copy(dentry->d_inode, iattr);
1282 mark_inode_dirty(dentry->d_inode);
1283 return 0;
1284 }
1285
1286 /**
1287 * v9fs_vfs_setattr_dotl - set file metadata
1288 * @dentry: file whose metadata to set
1289 * @iattr: metadata assignment structure
1290 *
1291 */
1292
1293 int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
1294 {
1295 int retval;
1296 struct v9fs_session_info *v9ses;
1297 struct p9_fid *fid;
1298 struct p9_iattr_dotl p9attr;
1299
1300 P9_DPRINTK(P9_DEBUG_VFS, "\n");
1301
1302 retval = inode_change_ok(dentry->d_inode, iattr);
1303 if (retval)
1304 return retval;
1305
1306 p9attr.valid = iattr->ia_valid;
1307 p9attr.mode = iattr->ia_mode;
1308 p9attr.uid = iattr->ia_uid;
1309 p9attr.gid = iattr->ia_gid;
1310 p9attr.size = iattr->ia_size;
1311 p9attr.atime_sec = iattr->ia_atime.tv_sec;
1312 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
1313 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
1314 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
1315
1316 retval = -EPERM;
1317 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1318 fid = v9fs_fid_lookup(dentry);
1319 if (IS_ERR(fid))
1320 return PTR_ERR(fid);
1321
1322 retval = p9_client_setattr(fid, &p9attr);
1323 if (retval < 0)
1324 return retval;
1325
1326 if ((iattr->ia_valid & ATTR_SIZE) &&
1327 iattr->ia_size != i_size_read(dentry->d_inode)) {
1328 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
1329 if (retval)
1330 return retval;
1331 }
1332
1333 setattr_copy(dentry->d_inode, iattr);
1334 mark_inode_dirty(dentry->d_inode);
1335 if (iattr->ia_valid & ATTR_MODE) {
1336 /* We also want to update ACL when we update mode bits */
1337 retval = v9fs_acl_chmod(dentry);
1338 if (retval < 0)
1339 return retval;
1340 }
1341 return 0;
1342 }
1343
1344 /**
1345 * v9fs_stat2inode - populate an inode structure with mistat info
1346 * @stat: Plan 9 metadata (mistat) structure
1347 * @inode: inode to populate
1348 * @sb: superblock of filesystem
1349 *
1350 */
1351
1352 void
1353 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
1354 struct super_block *sb)
1355 {
1356 char ext[32];
1357 char tag_name[14];
1358 unsigned int i_nlink;
1359 struct v9fs_session_info *v9ses = sb->s_fs_info;
1360
1361 inode->i_nlink = 1;
1362
1363 inode->i_atime.tv_sec = stat->atime;
1364 inode->i_mtime.tv_sec = stat->mtime;
1365 inode->i_ctime.tv_sec = stat->mtime;
1366
1367 inode->i_uid = v9ses->dfltuid;
1368 inode->i_gid = v9ses->dfltgid;
1369
1370 if (v9fs_proto_dotu(v9ses)) {
1371 inode->i_uid = stat->n_uid;
1372 inode->i_gid = stat->n_gid;
1373 }
1374 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
1375 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
1376 /*
1377 * Hadlink support got added later to
1378 * to the .u extension. So there can be
1379 * server out there that doesn't support
1380 * this even with .u extension. So check
1381 * for non NULL stat->extension
1382 */
1383 strncpy(ext, stat->extension, sizeof(ext));
1384 /* HARDLINKCOUNT %u */
1385 sscanf(ext, "%13s %u", tag_name, &i_nlink);
1386 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
1387 inode->i_nlink = i_nlink;
1388 }
1389 }
1390 inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
1391 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
1392 char type = 0;
1393 int major = -1;
1394 int minor = -1;
1395
1396 strncpy(ext, stat->extension, sizeof(ext));
1397 sscanf(ext, "%c %u %u", &type, &major, &minor);
1398 switch (type) {
1399 case 'c':
1400 inode->i_mode &= ~S_IFBLK;
1401 inode->i_mode |= S_IFCHR;
1402 break;
1403 case 'b':
1404 break;
1405 default:
1406 P9_DPRINTK(P9_DEBUG_ERROR,
1407 "Unknown special type %c %s\n", type,
1408 stat->extension);
1409 };
1410 inode->i_rdev = MKDEV(major, minor);
1411 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1412 } else
1413 inode->i_rdev = 0;
1414
1415 i_size_write(inode, stat->length);
1416
1417 /* not real number of blocks, but 512 byte ones ... */
1418 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
1419 }
1420
1421 /**
1422 * v9fs_stat2inode_dotl - populate an inode structure with stat info
1423 * @stat: stat structure
1424 * @inode: inode to populate
1425 * @sb: superblock of filesystem
1426 *
1427 */
1428
1429 void
1430 v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
1431 {
1432
1433 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
1434 inode->i_atime.tv_sec = stat->st_atime_sec;
1435 inode->i_atime.tv_nsec = stat->st_atime_nsec;
1436 inode->i_mtime.tv_sec = stat->st_mtime_sec;
1437 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
1438 inode->i_ctime.tv_sec = stat->st_ctime_sec;
1439 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
1440 inode->i_uid = stat->st_uid;
1441 inode->i_gid = stat->st_gid;
1442 inode->i_nlink = stat->st_nlink;
1443 inode->i_mode = stat->st_mode;
1444 inode->i_rdev = new_decode_dev(stat->st_rdev);
1445
1446 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
1447 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1448
1449 i_size_write(inode, stat->st_size);
1450 inode->i_blocks = stat->st_blocks;
1451 } else {
1452 if (stat->st_result_mask & P9_STATS_ATIME) {
1453 inode->i_atime.tv_sec = stat->st_atime_sec;
1454 inode->i_atime.tv_nsec = stat->st_atime_nsec;
1455 }
1456 if (stat->st_result_mask & P9_STATS_MTIME) {
1457 inode->i_mtime.tv_sec = stat->st_mtime_sec;
1458 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
1459 }
1460 if (stat->st_result_mask & P9_STATS_CTIME) {
1461 inode->i_ctime.tv_sec = stat->st_ctime_sec;
1462 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
1463 }
1464 if (stat->st_result_mask & P9_STATS_UID)
1465 inode->i_uid = stat->st_uid;
1466 if (stat->st_result_mask & P9_STATS_GID)
1467 inode->i_gid = stat->st_gid;
1468 if (stat->st_result_mask & P9_STATS_NLINK)
1469 inode->i_nlink = stat->st_nlink;
1470 if (stat->st_result_mask & P9_STATS_MODE) {
1471 inode->i_mode = stat->st_mode;
1472 if ((S_ISBLK(inode->i_mode)) ||
1473 (S_ISCHR(inode->i_mode)))
1474 init_special_inode(inode, inode->i_mode,
1475 inode->i_rdev);
1476 }
1477 if (stat->st_result_mask & P9_STATS_RDEV)
1478 inode->i_rdev = new_decode_dev(stat->st_rdev);
1479 if (stat->st_result_mask & P9_STATS_SIZE)
1480 i_size_write(inode, stat->st_size);
1481 if (stat->st_result_mask & P9_STATS_BLOCKS)
1482 inode->i_blocks = stat->st_blocks;
1483 }
1484 if (stat->st_result_mask & P9_STATS_GEN)
1485 inode->i_generation = stat->st_gen;
1486
1487 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
1488 * because the inode structure does not have fields for them.
1489 */
1490 }
1491
1492 /**
1493 * v9fs_qid2ino - convert qid into inode number
1494 * @qid: qid to hash
1495 *
1496 * BUG: potential for inode number collisions?
1497 */
1498
1499 ino_t v9fs_qid2ino(struct p9_qid *qid)
1500 {
1501 u64 path = qid->path + 2;
1502 ino_t i = 0;
1503
1504 if (sizeof(ino_t) == sizeof(path))
1505 memcpy(&i, &path, sizeof(ino_t));
1506 else
1507 i = (ino_t) (path ^ (path >> 32));
1508
1509 return i;
1510 }
1511
1512 /**
1513 * v9fs_readlink - read a symlink's location (internal version)
1514 * @dentry: dentry for symlink
1515 * @buffer: buffer to load symlink location into
1516 * @buflen: length of buffer
1517 *
1518 */
1519
1520 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1521 {
1522 int retval;
1523
1524 struct v9fs_session_info *v9ses;
1525 struct p9_fid *fid;
1526 struct p9_wstat *st;
1527
1528 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
1529 retval = -EPERM;
1530 v9ses = v9fs_inode2v9ses(dentry->d_inode);
1531 fid = v9fs_fid_lookup(dentry);
1532 if (IS_ERR(fid))
1533 return PTR_ERR(fid);
1534
1535 if (!v9fs_proto_dotu(v9ses))
1536 return -EBADF;
1537
1538 st = p9_client_stat(fid);
1539 if (IS_ERR(st))
1540 return PTR_ERR(st);
1541
1542 if (!(st->mode & P9_DMSYMLINK)) {
1543 retval = -EINVAL;
1544 goto done;
1545 }
1546
1547 /* copy extension buffer into buffer */
1548 strncpy(buffer, st->extension, buflen);
1549
1550 P9_DPRINTK(P9_DEBUG_VFS,
1551 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
1552
1553 retval = strnlen(buffer, buflen);
1554 done:
1555 p9stat_free(st);
1556 kfree(st);
1557 return retval;
1558 }
1559
1560 /**
1561 * v9fs_vfs_follow_link - follow a symlink path
1562 * @dentry: dentry for symlink
1563 * @nd: nameidata
1564 *
1565 */
1566
1567 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1568 {
1569 int len = 0;
1570 char *link = __getname();
1571
1572 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
1573
1574 if (!link)
1575 link = ERR_PTR(-ENOMEM);
1576 else {
1577 len = v9fs_readlink(dentry, link, PATH_MAX);
1578
1579 if (len < 0) {
1580 __putname(link);
1581 link = ERR_PTR(len);
1582 } else
1583 link[min(len, PATH_MAX-1)] = 0;
1584 }
1585 nd_set_link(nd, link);
1586
1587 return NULL;
1588 }
1589
1590 /**
1591 * v9fs_vfs_put_link - release a symlink path
1592 * @dentry: dentry for symlink
1593 * @nd: nameidata
1594 * @p: unused
1595 *
1596 */
1597
1598 static void
1599 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1600 {
1601 char *s = nd_get_link(nd);
1602
1603 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
1604 IS_ERR(s) ? "<error>" : s);
1605 if (!IS_ERR(s))
1606 __putname(s);
1607 }
1608
1609 /**
1610 * v9fs_vfs_mkspecial - create a special file
1611 * @dir: inode to create special file in
1612 * @dentry: dentry to create
1613 * @mode: mode to create special file
1614 * @extension: 9p2000.u format extension string representing special file
1615 *
1616 */
1617
1618 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
1619 int mode, const char *extension)
1620 {
1621 u32 perm;
1622 struct v9fs_session_info *v9ses;
1623 struct p9_fid *fid;
1624
1625 v9ses = v9fs_inode2v9ses(dir);
1626 if (!v9fs_proto_dotu(v9ses)) {
1627 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
1628 return -EPERM;
1629 }
1630
1631 perm = unixmode2p9mode(v9ses, mode);
1632 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1633 P9_OREAD);
1634 if (IS_ERR(fid))
1635 return PTR_ERR(fid);
1636
1637 p9_client_clunk(fid);
1638 return 0;
1639 }
1640
1641 /**
1642 * v9fs_vfs_symlink_dotl - helper function to create symlinks
1643 * @dir: directory inode containing symlink
1644 * @dentry: dentry for symlink
1645 * @symname: symlink data
1646 *
1647 * See Also: 9P2000.L RFC for more information
1648 *
1649 */
1650
1651 static int
1652 v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
1653 const char *symname)
1654 {
1655 struct v9fs_session_info *v9ses;
1656 struct p9_fid *dfid;
1657 struct p9_fid *fid = NULL;
1658 struct inode *inode;
1659 struct p9_qid qid;
1660 char *name;
1661 int err;
1662 gid_t gid;
1663
1664 name = (char *) dentry->d_name.name;
1665 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
1666 dir->i_ino, name, symname);
1667 v9ses = v9fs_inode2v9ses(dir);
1668
1669 dfid = v9fs_fid_lookup(dentry->d_parent);
1670 if (IS_ERR(dfid)) {
1671 err = PTR_ERR(dfid);
1672 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
1673 return err;
1674 }
1675
1676 gid = v9fs_get_fsgid_for_create(dir);
1677
1678 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
1679 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
1680
1681 if (err < 0) {
1682 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
1683 goto error;
1684 }
1685
1686 if (v9ses->cache) {
1687 /* Now walk from the parent so we can get an unopened fid. */
1688 fid = p9_client_walk(dfid, 1, &name, 1);
1689 if (IS_ERR(fid)) {
1690 err = PTR_ERR(fid);
1691 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
1692 err);
1693 fid = NULL;
1694 goto error;
1695 }
1696
1697 /* instantiate inode and assign the unopened fid to dentry */
1698 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1699 if (IS_ERR(inode)) {
1700 err = PTR_ERR(inode);
1701 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
1702 err);
1703 goto error;
1704 }
1705 dentry->d_op = &v9fs_cached_dentry_operations;
1706 d_instantiate(dentry, inode);
1707 err = v9fs_fid_add(dentry, fid);
1708 if (err < 0)
1709 goto error;
1710 fid = NULL;
1711 } else {
1712 /* Not in cached mode. No need to populate inode with stat */
1713 inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
1714 if (IS_ERR(inode)) {
1715 err = PTR_ERR(inode);
1716 goto error;
1717 }
1718 dentry->d_op = &v9fs_dentry_operations;
1719 d_instantiate(dentry, inode);
1720 }
1721
1722 error:
1723 if (fid)
1724 p9_client_clunk(fid);
1725
1726 return err;
1727 }
1728
1729 /**
1730 * v9fs_vfs_symlink - helper function to create symlinks
1731 * @dir: directory inode containing symlink
1732 * @dentry: dentry for symlink
1733 * @symname: symlink data
1734 *
1735 * See Also: 9P2000.u RFC for more information
1736 *
1737 */
1738
1739 static int
1740 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1741 {
1742 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
1743 dentry->d_name.name, symname);
1744
1745 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
1746 }
1747
1748 /**
1749 * v9fs_vfs_link - create a hardlink
1750 * @old_dentry: dentry for file to link to
1751 * @dir: inode destination for new link
1752 * @dentry: dentry for link
1753 *
1754 */
1755
1756 static int
1757 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1758 struct dentry *dentry)
1759 {
1760 int retval;
1761 struct p9_fid *oldfid;
1762 char *name;
1763
1764 P9_DPRINTK(P9_DEBUG_VFS,
1765 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1766 old_dentry->d_name.name);
1767
1768 oldfid = v9fs_fid_clone(old_dentry);
1769 if (IS_ERR(oldfid))
1770 return PTR_ERR(oldfid);
1771
1772 name = __getname();
1773 if (unlikely(!name)) {
1774 retval = -ENOMEM;
1775 goto clunk_fid;
1776 }
1777
1778 sprintf(name, "%d\n", oldfid->fid);
1779 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
1780 __putname(name);
1781
1782 clunk_fid:
1783 p9_client_clunk(oldfid);
1784 return retval;
1785 }
1786
1787 /**
1788 * v9fs_vfs_link_dotl - create a hardlink for dotl
1789 * @old_dentry: dentry for file to link to
1790 * @dir: inode destination for new link
1791 * @dentry: dentry for link
1792 *
1793 */
1794
1795 static int
1796 v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
1797 struct dentry *dentry)
1798 {
1799 int err;
1800 struct p9_fid *dfid, *oldfid;
1801 char *name;
1802 struct v9fs_session_info *v9ses;
1803 struct dentry *dir_dentry;
1804
1805 P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
1806 dir->i_ino, old_dentry->d_name.name,
1807 dentry->d_name.name);
1808
1809 v9ses = v9fs_inode2v9ses(dir);
1810 dir_dentry = v9fs_dentry_from_dir_inode(dir);
1811 dfid = v9fs_fid_lookup(dir_dentry);
1812 if (IS_ERR(dfid))
1813 return PTR_ERR(dfid);
1814
1815 oldfid = v9fs_fid_lookup(old_dentry);
1816 if (IS_ERR(oldfid))
1817 return PTR_ERR(oldfid);
1818
1819 name = (char *) dentry->d_name.name;
1820
1821 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
1822
1823 if (err < 0) {
1824 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
1825 return err;
1826 }
1827
1828 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1829 /* Get the latest stat info from server. */
1830 struct p9_fid *fid;
1831 struct p9_stat_dotl *st;
1832
1833 fid = v9fs_fid_lookup(old_dentry);
1834 if (IS_ERR(fid))
1835 return PTR_ERR(fid);
1836
1837 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
1838 if (IS_ERR(st))
1839 return PTR_ERR(st);
1840
1841 v9fs_stat2inode_dotl(st, old_dentry->d_inode);
1842
1843 kfree(st);
1844 } else {
1845 /* Caching disabled. No need to get upto date stat info.
1846 * This dentry will be released immediately. So, just hold the
1847 * inode
1848 */
1849 ihold(old_dentry->d_inode);
1850 }
1851
1852 dentry->d_op = old_dentry->d_op;
1853 d_instantiate(dentry, old_dentry->d_inode);
1854
1855 return err;
1856 }
1857
1858 /**
1859 * v9fs_vfs_mknod - create a special file
1860 * @dir: inode destination for new link
1861 * @dentry: dentry for file
1862 * @mode: mode for creation
1863 * @rdev: device associated with special file
1864 *
1865 */
1866
1867 static int
1868 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1869 {
1870 int retval;
1871 char *name;
1872
1873 P9_DPRINTK(P9_DEBUG_VFS,
1874 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1875 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1876
1877 if (!new_valid_dev(rdev))
1878 return -EINVAL;
1879
1880 name = __getname();
1881 if (!name)
1882 return -ENOMEM;
1883 /* build extension */
1884 if (S_ISBLK(mode))
1885 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
1886 else if (S_ISCHR(mode))
1887 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
1888 else if (S_ISFIFO(mode))
1889 *name = 0;
1890 else if (S_ISSOCK(mode))
1891 *name = 0;
1892 else {
1893 __putname(name);
1894 return -EINVAL;
1895 }
1896
1897 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
1898 __putname(name);
1899
1900 return retval;
1901 }
1902
1903 /**
1904 * v9fs_vfs_mknod_dotl - create a special file
1905 * @dir: inode destination for new link
1906 * @dentry: dentry for file
1907 * @mode: mode for creation
1908 * @rdev: device associated with special file
1909 *
1910 */
1911 static int
1912 v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
1913 dev_t rdev)
1914 {
1915 int err;
1916 char *name;
1917 mode_t mode;
1918 struct v9fs_session_info *v9ses;
1919 struct p9_fid *fid = NULL, *dfid = NULL;
1920 struct inode *inode;
1921 gid_t gid;
1922 struct p9_qid qid;
1923 struct dentry *dir_dentry;
1924 struct posix_acl *dacl = NULL, *pacl = NULL;
1925
1926 P9_DPRINTK(P9_DEBUG_VFS,
1927 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1928 dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
1929
1930 if (!new_valid_dev(rdev))
1931 return -EINVAL;
1932
1933 v9ses = v9fs_inode2v9ses(dir);
1934 dir_dentry = v9fs_dentry_from_dir_inode(dir);
1935 dfid = v9fs_fid_lookup(dir_dentry);
1936 if (IS_ERR(dfid)) {
1937 err = PTR_ERR(dfid);
1938 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
1939 dfid = NULL;
1940 goto error;
1941 }
1942
1943 gid = v9fs_get_fsgid_for_create(dir);
1944 mode = omode;
1945 /* Update mode based on ACL value */
1946 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
1947 if (err) {
1948 P9_DPRINTK(P9_DEBUG_VFS,
1949 "Failed to get acl values in mknod %d\n", err);
1950 goto error;
1951 }
1952 name = (char *) dentry->d_name.name;
1953
1954 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
1955 if (err < 0)
1956 goto error;
1957
1958 /* instantiate inode and assign the unopened fid to the dentry */
1959 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1960 fid = p9_client_walk(dfid, 1, &name, 1);
1961 if (IS_ERR(fid)) {
1962 err = PTR_ERR(fid);
1963 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
1964 err);
1965 fid = NULL;
1966 goto error;
1967 }
1968
1969 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
1970 if (IS_ERR(inode)) {
1971 err = PTR_ERR(inode);
1972 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
1973 err);
1974 goto error;
1975 }
1976 dentry->d_op = &v9fs_cached_dentry_operations;
1977 d_instantiate(dentry, inode);
1978 err = v9fs_fid_add(dentry, fid);
1979 if (err < 0)
1980 goto error;
1981 fid = NULL;
1982 } else {
1983 /*
1984 * Not in cached mode. No need to populate inode with stat.
1985 * socket syscall returns a fd, so we need instantiate
1986 */
1987 inode = v9fs_get_inode(dir->i_sb, mode);
1988 if (IS_ERR(inode)) {
1989 err = PTR_ERR(inode);
1990 goto error;
1991 }
1992 dentry->d_op = &v9fs_dentry_operations;
1993 d_instantiate(dentry, inode);
1994 }
1995 /* Now set the ACL based on the default value */
1996 v9fs_set_create_acl(dentry, dacl, pacl);
1997 error:
1998 if (fid)
1999 p9_client_clunk(fid);
2000 return err;
2001 }
2002
2003 static int
2004 v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen)
2005 {
2006 int retval;
2007 struct p9_fid *fid;
2008 char *target = NULL;
2009
2010 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
2011 retval = -EPERM;
2012 fid = v9fs_fid_lookup(dentry);
2013 if (IS_ERR(fid))
2014 return PTR_ERR(fid);
2015
2016 retval = p9_client_readlink(fid, &target);
2017 if (retval < 0)
2018 return retval;
2019
2020 strncpy(buffer, target, buflen);
2021 P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer);
2022
2023 retval = strnlen(buffer, buflen);
2024 return retval;
2025 }
2026
2027 /**
2028 * v9fs_vfs_follow_link_dotl - follow a symlink path
2029 * @dentry: dentry for symlink
2030 * @nd: nameidata
2031 *
2032 */
2033
2034 static void *
2035 v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
2036 {
2037 int len = 0;
2038 char *link = __getname();
2039
2040 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
2041
2042 if (!link)
2043 link = ERR_PTR(-ENOMEM);
2044 else {
2045 len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX);
2046 if (len < 0) {
2047 __putname(link);
2048 link = ERR_PTR(len);
2049 } else
2050 link[min(len, PATH_MAX-1)] = 0;
2051 }
2052 nd_set_link(nd, link);
2053
2054 return NULL;
2055 }
2056
2057 static const struct inode_operations v9fs_dir_inode_operations_dotu = {
2058 .create = v9fs_vfs_create,
2059 .lookup = v9fs_vfs_lookup,
2060 .symlink = v9fs_vfs_symlink,
2061 .link = v9fs_vfs_link,
2062 .unlink = v9fs_vfs_unlink,
2063 .mkdir = v9fs_vfs_mkdir,
2064 .rmdir = v9fs_vfs_rmdir,
2065 .mknod = v9fs_vfs_mknod,
2066 .rename = v9fs_vfs_rename,
2067 .getattr = v9fs_vfs_getattr,
2068 .setattr = v9fs_vfs_setattr,
2069 };
2070
2071 static const struct inode_operations v9fs_dir_inode_operations_dotl = {
2072 .create = v9fs_vfs_create_dotl,
2073 .lookup = v9fs_vfs_lookup,
2074 .link = v9fs_vfs_link_dotl,
2075 .symlink = v9fs_vfs_symlink_dotl,
2076 .unlink = v9fs_vfs_unlink,
2077 .mkdir = v9fs_vfs_mkdir_dotl,
2078 .rmdir = v9fs_vfs_rmdir,
2079 .mknod = v9fs_vfs_mknod_dotl,
2080 .rename = v9fs_vfs_rename,
2081 .getattr = v9fs_vfs_getattr_dotl,
2082 .setattr = v9fs_vfs_setattr_dotl,
2083 .setxattr = generic_setxattr,
2084 .getxattr = generic_getxattr,
2085 .removexattr = generic_removexattr,
2086 .listxattr = v9fs_listxattr,
2087 .check_acl = v9fs_check_acl,
2088 };
2089
2090 static const struct inode_operations v9fs_dir_inode_operations = {
2091 .create = v9fs_vfs_create,
2092 .lookup = v9fs_vfs_lookup,
2093 .unlink = v9fs_vfs_unlink,
2094 .mkdir = v9fs_vfs_mkdir,
2095 .rmdir = v9fs_vfs_rmdir,
2096 .mknod = v9fs_vfs_mknod,
2097 .rename = v9fs_vfs_rename,
2098 .getattr = v9fs_vfs_getattr,
2099 .setattr = v9fs_vfs_setattr,
2100 };
2101
2102 static const struct inode_operations v9fs_file_inode_operations = {
2103 .getattr = v9fs_vfs_getattr,
2104 .setattr = v9fs_vfs_setattr,
2105 };
2106
2107 static const struct inode_operations v9fs_file_inode_operations_dotl = {
2108 .getattr = v9fs_vfs_getattr_dotl,
2109 .setattr = v9fs_vfs_setattr_dotl,
2110 .setxattr = generic_setxattr,
2111 .getxattr = generic_getxattr,
2112 .removexattr = generic_removexattr,
2113 .listxattr = v9fs_listxattr,
2114 .check_acl = v9fs_check_acl,
2115 };
2116
2117 static const struct inode_operations v9fs_symlink_inode_operations = {
2118 .readlink = generic_readlink,
2119 .follow_link = v9fs_vfs_follow_link,
2120 .put_link = v9fs_vfs_put_link,
2121 .getattr = v9fs_vfs_getattr,
2122 .setattr = v9fs_vfs_setattr,
2123 };
2124
2125 static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
2126 .readlink = v9fs_vfs_readlink_dotl,
2127 .follow_link = v9fs_vfs_follow_link_dotl,
2128 .put_link = v9fs_vfs_put_link,
2129 .getattr = v9fs_vfs_getattr_dotl,
2130 .setattr = v9fs_vfs_setattr_dotl,
2131 .setxattr = generic_setxattr,
2132 .getxattr = generic_getxattr,
2133 .removexattr = generic_removexattr,
2134 .listxattr = v9fs_listxattr,
2135 };
kernel source for telekom puls (alcatel/mediatek)