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11#include <linux/module.h>
12#include <linux/errno.h>
13#include <linux/fs.h>
14#include <linux/file.h>
15#include <linux/pagemap.h>
16#include <linux/stat.h>
17#include <linux/string.h>
18#include <linux/inet.h>
19#include <linux/namei.h>
20#include <linux/idr.h>
21#include <linux/sched.h>
22#include <linux/slab.h>
23#include <linux/xattr.h>
24#include <linux/posix_acl.h>
25#include <net/9p/9p.h>
26#include <net/9p/client.h>
27
28#include "v9fs.h"
29#include "v9fs_vfs.h"
30#include "fid.h"
31#include "cache.h"
32#include "xattr.h"
33#include "acl.h"
34
35static int
36v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
37 dev_t rdev);
38
39
40
41
42
43
44
45static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
46{
47 BUG_ON(dir_inode == NULL);
48
49 if (dir_inode->i_mode & S_ISGID) {
50
51 return dir_inode->i_gid;
52 }
53 return current_fsgid();
54}
55
56static int v9fs_test_inode_dotl(struct inode *inode, void *data)
57{
58 struct v9fs_inode *v9inode = V9FS_I(inode);
59 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
60
61
62 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
63 return 0;
64
65 if (inode->i_generation != st->st_gen)
66 return 0;
67
68
69 if (memcmp(&v9inode->qid.version,
70 &st->qid.version, sizeof(v9inode->qid.version)))
71 return 0;
72
73 if (v9inode->qid.type != st->qid.type)
74 return 0;
75
76 if (v9inode->qid.path != st->qid.path)
77 return 0;
78 return 1;
79}
80
81
82static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
83{
84 return 0;
85}
86
87static int v9fs_set_inode_dotl(struct inode *inode, void *data)
88{
89 struct v9fs_inode *v9inode = V9FS_I(inode);
90 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
91
92 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
93 inode->i_generation = st->st_gen;
94 return 0;
95}
96
97static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
98 struct p9_qid *qid,
99 struct p9_fid *fid,
100 struct p9_stat_dotl *st,
101 int new)
102{
103 int retval;
104 unsigned long i_ino;
105 struct inode *inode;
106 struct v9fs_session_info *v9ses = sb->s_fs_info;
107 int (*test)(struct inode *, void *);
108
109 if (new)
110 test = v9fs_test_new_inode_dotl;
111 else
112 test = v9fs_test_inode_dotl;
113
114 i_ino = v9fs_qid2ino(qid);
115 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
116 if (!inode)
117 return ERR_PTR(-ENOMEM);
118 if (!(inode->i_state & I_NEW))
119 return inode;
120
121
122
123
124
125 inode->i_ino = i_ino;
126 retval = v9fs_init_inode(v9ses, inode,
127 st->st_mode, new_decode_dev(st->st_rdev));
128 if (retval)
129 goto error;
130
131 v9fs_stat2inode_dotl(st, inode, 0);
132 v9fs_cache_inode_get_cookie(inode);
133 retval = v9fs_get_acl(inode, fid);
134 if (retval)
135 goto error;
136
137 unlock_new_inode(inode);
138 return inode;
139error:
140 iget_failed(inode);
141 return ERR_PTR(retval);
142
143}
144
145struct inode *
146v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
147 struct super_block *sb, int new)
148{
149 struct p9_stat_dotl *st;
150 struct inode *inode = NULL;
151
152 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
153 if (IS_ERR(st))
154 return ERR_CAST(st);
155
156 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
157 kfree(st);
158 return inode;
159}
160
161struct dotl_openflag_map {
162 int open_flag;
163 int dotl_flag;
164};
165
166static int v9fs_mapped_dotl_flags(int flags)
167{
168 int i;
169 int rflags = 0;
170 struct dotl_openflag_map dotl_oflag_map[] = {
171 { O_CREAT, P9_DOTL_CREATE },
172 { O_EXCL, P9_DOTL_EXCL },
173 { O_NOCTTY, P9_DOTL_NOCTTY },
174 { O_APPEND, P9_DOTL_APPEND },
175 { O_NONBLOCK, P9_DOTL_NONBLOCK },
176 { O_DSYNC, P9_DOTL_DSYNC },
177 { FASYNC, P9_DOTL_FASYNC },
178 { O_DIRECT, P9_DOTL_DIRECT },
179 { O_LARGEFILE, P9_DOTL_LARGEFILE },
180 { O_DIRECTORY, P9_DOTL_DIRECTORY },
181 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
182 { O_NOATIME, P9_DOTL_NOATIME },
183 { O_CLOEXEC, P9_DOTL_CLOEXEC },
184 { O_SYNC, P9_DOTL_SYNC},
185 };
186 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
187 if (flags & dotl_oflag_map[i].open_flag)
188 rflags |= dotl_oflag_map[i].dotl_flag;
189 }
190 return rflags;
191}
192
193
194
195
196
197
198int v9fs_open_to_dotl_flags(int flags)
199{
200 int rflags = 0;
201
202
203
204
205
206 rflags |= flags & O_ACCMODE;
207 rflags |= v9fs_mapped_dotl_flags(flags);
208
209 return rflags;
210}
211
212
213
214
215
216
217
218
219
220static int
221v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
222 bool excl)
223{
224 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
225}
226
227static int
228v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
229 struct file *file, unsigned flags, umode_t omode)
230{
231 int err = 0;
232 kgid_t gid;
233 umode_t mode;
234 const unsigned char *name = NULL;
235 struct p9_qid qid;
236 struct inode *inode;
237 struct p9_fid *fid = NULL;
238 struct v9fs_inode *v9inode;
239 struct p9_fid *dfid, *ofid, *inode_fid;
240 struct v9fs_session_info *v9ses;
241 struct posix_acl *pacl = NULL, *dacl = NULL;
242 struct dentry *res = NULL;
243
244 if (d_in_lookup(dentry)) {
245 res = v9fs_vfs_lookup(dir, dentry, 0);
246 if (IS_ERR(res))
247 return PTR_ERR(res);
248
249 if (res)
250 dentry = res;
251 }
252
253
254 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
255 return finish_no_open(file, res);
256
257 v9ses = v9fs_inode2v9ses(dir);
258
259 name = dentry->d_name.name;
260 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
261 name, flags, omode);
262
263 dfid = v9fs_parent_fid(dentry);
264 if (IS_ERR(dfid)) {
265 err = PTR_ERR(dfid);
266 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
267 goto out;
268 }
269
270
271 ofid = clone_fid(dfid);
272 if (IS_ERR(ofid)) {
273 err = PTR_ERR(ofid);
274 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
275 goto out;
276 }
277
278 gid = v9fs_get_fsgid_for_create(dir);
279
280 mode = omode;
281
282 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
283 if (err) {
284 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
285 err);
286 goto error;
287 }
288 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
289 mode, gid, &qid);
290 if (err < 0) {
291 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
292 err);
293 goto error;
294 }
295 v9fs_invalidate_inode_attr(dir);
296
297
298 fid = p9_client_walk(dfid, 1, &name, 1);
299 if (IS_ERR(fid)) {
300 err = PTR_ERR(fid);
301 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
302 fid = NULL;
303 goto error;
304 }
305 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
306 if (IS_ERR(inode)) {
307 err = PTR_ERR(inode);
308 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
309 goto error;
310 }
311
312 v9fs_set_create_acl(inode, fid, dacl, pacl);
313
314 v9fs_fid_add(dentry, fid);
315 d_instantiate(dentry, inode);
316
317 v9inode = V9FS_I(inode);
318 mutex_lock(&v9inode->v_mutex);
319 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
320 !v9inode->writeback_fid &&
321 ((flags & O_ACCMODE) != O_RDONLY)) {
322
323
324
325
326
327
328
329 inode_fid = v9fs_writeback_fid(dentry);
330 if (IS_ERR(inode_fid)) {
331 err = PTR_ERR(inode_fid);
332 mutex_unlock(&v9inode->v_mutex);
333 goto err_clunk_old_fid;
334 }
335 v9inode->writeback_fid = (void *) inode_fid;
336 }
337 mutex_unlock(&v9inode->v_mutex);
338
339 err = finish_open(file, dentry, generic_file_open);
340 if (err)
341 goto err_clunk_old_fid;
342 file->private_data = ofid;
343 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
344 v9fs_cache_inode_set_cookie(inode, file);
345 file->f_mode |= FMODE_CREATED;
346out:
347 v9fs_put_acl(dacl, pacl);
348 dput(res);
349 return err;
350
351error:
352 if (fid)
353 p9_client_clunk(fid);
354err_clunk_old_fid:
355 if (ofid)
356 p9_client_clunk(ofid);
357 goto out;
358}
359
360
361
362
363
364
365
366
367
368static int v9fs_vfs_mkdir_dotl(struct inode *dir,
369 struct dentry *dentry, umode_t omode)
370{
371 int err;
372 struct v9fs_session_info *v9ses;
373 struct p9_fid *fid = NULL, *dfid = NULL;
374 kgid_t gid;
375 const unsigned char *name;
376 umode_t mode;
377 struct inode *inode;
378 struct p9_qid qid;
379 struct posix_acl *dacl = NULL, *pacl = NULL;
380
381 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
382 err = 0;
383 v9ses = v9fs_inode2v9ses(dir);
384
385 omode |= S_IFDIR;
386 if (dir->i_mode & S_ISGID)
387 omode |= S_ISGID;
388
389 dfid = v9fs_parent_fid(dentry);
390 if (IS_ERR(dfid)) {
391 err = PTR_ERR(dfid);
392 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
393 dfid = NULL;
394 goto error;
395 }
396
397 gid = v9fs_get_fsgid_for_create(dir);
398 mode = omode;
399
400 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
401 if (err) {
402 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
403 err);
404 goto error;
405 }
406 name = dentry->d_name.name;
407 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
408 if (err < 0)
409 goto error;
410
411 fid = p9_client_walk(dfid, 1, &name, 1);
412 if (IS_ERR(fid)) {
413 err = PTR_ERR(fid);
414 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
415 err);
416 fid = NULL;
417 goto error;
418 }
419
420
421 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
422 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
423 if (IS_ERR(inode)) {
424 err = PTR_ERR(inode);
425 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
426 err);
427 goto error;
428 }
429 v9fs_fid_add(dentry, fid);
430 v9fs_set_create_acl(inode, fid, dacl, pacl);
431 d_instantiate(dentry, inode);
432 fid = NULL;
433 err = 0;
434 } else {
435
436
437
438
439
440 inode = v9fs_get_inode(dir->i_sb, mode, 0);
441 if (IS_ERR(inode)) {
442 err = PTR_ERR(inode);
443 goto error;
444 }
445 v9fs_set_create_acl(inode, fid, dacl, pacl);
446 d_instantiate(dentry, inode);
447 }
448 inc_nlink(dir);
449 v9fs_invalidate_inode_attr(dir);
450error:
451 if (fid)
452 p9_client_clunk(fid);
453 v9fs_put_acl(dacl, pacl);
454 return err;
455}
456
457static int
458v9fs_vfs_getattr_dotl(const struct path *path, struct kstat *stat,
459 u32 request_mask, unsigned int flags)
460{
461 struct dentry *dentry = path->dentry;
462 struct v9fs_session_info *v9ses;
463 struct p9_fid *fid;
464 struct p9_stat_dotl *st;
465
466 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
467 v9ses = v9fs_dentry2v9ses(dentry);
468 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
469 generic_fillattr(d_inode(dentry), stat);
470 return 0;
471 }
472 fid = v9fs_fid_lookup(dentry);
473 if (IS_ERR(fid))
474 return PTR_ERR(fid);
475
476
477
478
479
480 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
481 if (IS_ERR(st))
482 return PTR_ERR(st);
483
484 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
485 generic_fillattr(d_inode(dentry), stat);
486
487 stat->blksize = st->st_blksize;
488
489 kfree(st);
490 return 0;
491}
492
493
494
495
496#define P9_ATTR_MODE (1 << 0)
497#define P9_ATTR_UID (1 << 1)
498#define P9_ATTR_GID (1 << 2)
499#define P9_ATTR_SIZE (1 << 3)
500#define P9_ATTR_ATIME (1 << 4)
501#define P9_ATTR_MTIME (1 << 5)
502#define P9_ATTR_CTIME (1 << 6)
503#define P9_ATTR_ATIME_SET (1 << 7)
504#define P9_ATTR_MTIME_SET (1 << 8)
505
506struct dotl_iattr_map {
507 int iattr_valid;
508 int p9_iattr_valid;
509};
510
511static int v9fs_mapped_iattr_valid(int iattr_valid)
512{
513 int i;
514 int p9_iattr_valid = 0;
515 struct dotl_iattr_map dotl_iattr_map[] = {
516 { ATTR_MODE, P9_ATTR_MODE },
517 { ATTR_UID, P9_ATTR_UID },
518 { ATTR_GID, P9_ATTR_GID },
519 { ATTR_SIZE, P9_ATTR_SIZE },
520 { ATTR_ATIME, P9_ATTR_ATIME },
521 { ATTR_MTIME, P9_ATTR_MTIME },
522 { ATTR_CTIME, P9_ATTR_CTIME },
523 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
524 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
525 };
526 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
527 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
528 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
529 }
530 return p9_iattr_valid;
531}
532
533
534
535
536
537
538
539
540int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
541{
542 int retval;
543 struct p9_fid *fid = NULL;
544 struct p9_iattr_dotl p9attr;
545 struct inode *inode = d_inode(dentry);
546
547 p9_debug(P9_DEBUG_VFS, "\n");
548
549 retval = setattr_prepare(dentry, iattr);
550 if (retval)
551 return retval;
552
553 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
554 p9attr.mode = iattr->ia_mode;
555 p9attr.uid = iattr->ia_uid;
556 p9attr.gid = iattr->ia_gid;
557 p9attr.size = iattr->ia_size;
558 p9attr.atime_sec = iattr->ia_atime.tv_sec;
559 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
560 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
561 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
562
563 if (iattr->ia_valid & ATTR_FILE) {
564 fid = iattr->ia_file->private_data;
565 WARN_ON(!fid);
566 }
567 if (!fid)
568 fid = v9fs_fid_lookup(dentry);
569 if (IS_ERR(fid))
570 return PTR_ERR(fid);
571
572
573 if (S_ISREG(inode->i_mode))
574 filemap_write_and_wait(inode->i_mapping);
575
576 retval = p9_client_setattr(fid, &p9attr);
577 if (retval < 0)
578 return retval;
579
580 if ((iattr->ia_valid & ATTR_SIZE) &&
581 iattr->ia_size != i_size_read(inode))
582 truncate_setsize(inode, iattr->ia_size);
583
584 v9fs_invalidate_inode_attr(inode);
585 setattr_copy(inode, iattr);
586 mark_inode_dirty(inode);
587 if (iattr->ia_valid & ATTR_MODE) {
588
589 retval = v9fs_acl_chmod(inode, fid);
590 if (retval < 0)
591 return retval;
592 }
593 return 0;
594}
595
596
597
598
599
600
601
602
603
604void
605v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
606 unsigned int flags)
607{
608 umode_t mode;
609 struct v9fs_inode *v9inode = V9FS_I(inode);
610
611 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
612 inode->i_atime.tv_sec = stat->st_atime_sec;
613 inode->i_atime.tv_nsec = stat->st_atime_nsec;
614 inode->i_mtime.tv_sec = stat->st_mtime_sec;
615 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
616 inode->i_ctime.tv_sec = stat->st_ctime_sec;
617 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
618 inode->i_uid = stat->st_uid;
619 inode->i_gid = stat->st_gid;
620 set_nlink(inode, stat->st_nlink);
621
622 mode = stat->st_mode & S_IALLUGO;
623 mode |= inode->i_mode & ~S_IALLUGO;
624 inode->i_mode = mode;
625
626 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
627 v9fs_i_size_write(inode, stat->st_size);
628 inode->i_blocks = stat->st_blocks;
629 } else {
630 if (stat->st_result_mask & P9_STATS_ATIME) {
631 inode->i_atime.tv_sec = stat->st_atime_sec;
632 inode->i_atime.tv_nsec = stat->st_atime_nsec;
633 }
634 if (stat->st_result_mask & P9_STATS_MTIME) {
635 inode->i_mtime.tv_sec = stat->st_mtime_sec;
636 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
637 }
638 if (stat->st_result_mask & P9_STATS_CTIME) {
639 inode->i_ctime.tv_sec = stat->st_ctime_sec;
640 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
641 }
642 if (stat->st_result_mask & P9_STATS_UID)
643 inode->i_uid = stat->st_uid;
644 if (stat->st_result_mask & P9_STATS_GID)
645 inode->i_gid = stat->st_gid;
646 if (stat->st_result_mask & P9_STATS_NLINK)
647 set_nlink(inode, stat->st_nlink);
648 if (stat->st_result_mask & P9_STATS_MODE) {
649 inode->i_mode = stat->st_mode;
650 if ((S_ISBLK(inode->i_mode)) ||
651 (S_ISCHR(inode->i_mode)))
652 init_special_inode(inode, inode->i_mode,
653 inode->i_rdev);
654 }
655 if (stat->st_result_mask & P9_STATS_RDEV)
656 inode->i_rdev = new_decode_dev(stat->st_rdev);
657 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
658 stat->st_result_mask & P9_STATS_SIZE)
659 v9fs_i_size_write(inode, stat->st_size);
660 if (stat->st_result_mask & P9_STATS_BLOCKS)
661 inode->i_blocks = stat->st_blocks;
662 }
663 if (stat->st_result_mask & P9_STATS_GEN)
664 inode->i_generation = stat->st_gen;
665
666
667
668
669 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
670}
671
672static int
673v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
674 const char *symname)
675{
676 int err;
677 kgid_t gid;
678 const unsigned char *name;
679 struct p9_qid qid;
680 struct inode *inode;
681 struct p9_fid *dfid;
682 struct p9_fid *fid = NULL;
683 struct v9fs_session_info *v9ses;
684
685 name = dentry->d_name.name;
686 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
687 v9ses = v9fs_inode2v9ses(dir);
688
689 dfid = v9fs_parent_fid(dentry);
690 if (IS_ERR(dfid)) {
691 err = PTR_ERR(dfid);
692 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
693 return err;
694 }
695
696 gid = v9fs_get_fsgid_for_create(dir);
697
698
699 err = p9_client_symlink(dfid, name, symname, gid, &qid);
700
701 if (err < 0) {
702 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
703 goto error;
704 }
705
706 v9fs_invalidate_inode_attr(dir);
707 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
708
709 fid = p9_client_walk(dfid, 1, &name, 1);
710 if (IS_ERR(fid)) {
711 err = PTR_ERR(fid);
712 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
713 err);
714 fid = NULL;
715 goto error;
716 }
717
718
719 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
720 if (IS_ERR(inode)) {
721 err = PTR_ERR(inode);
722 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
723 err);
724 goto error;
725 }
726 v9fs_fid_add(dentry, fid);
727 d_instantiate(dentry, inode);
728 fid = NULL;
729 err = 0;
730 } else {
731
732 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
733 if (IS_ERR(inode)) {
734 err = PTR_ERR(inode);
735 goto error;
736 }
737 d_instantiate(dentry, inode);
738 }
739
740error:
741 if (fid)
742 p9_client_clunk(fid);
743
744 return err;
745}
746
747
748
749
750
751
752
753
754
755static int
756v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
757 struct dentry *dentry)
758{
759 int err;
760 struct p9_fid *dfid, *oldfid;
761 struct v9fs_session_info *v9ses;
762
763 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
764 dir->i_ino, old_dentry, dentry);
765
766 v9ses = v9fs_inode2v9ses(dir);
767 dfid = v9fs_parent_fid(dentry);
768 if (IS_ERR(dfid))
769 return PTR_ERR(dfid);
770
771 oldfid = v9fs_fid_lookup(old_dentry);
772 if (IS_ERR(oldfid))
773 return PTR_ERR(oldfid);
774
775 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
776
777 if (err < 0) {
778 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
779 return err;
780 }
781
782 v9fs_invalidate_inode_attr(dir);
783 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
784
785 struct p9_fid *fid;
786 fid = v9fs_fid_lookup(old_dentry);
787 if (IS_ERR(fid))
788 return PTR_ERR(fid);
789
790 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
791 }
792 ihold(d_inode(old_dentry));
793 d_instantiate(dentry, d_inode(old_dentry));
794
795 return err;
796}
797
798
799
800
801
802
803
804
805
806static int
807v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
808 dev_t rdev)
809{
810 int err;
811 kgid_t gid;
812 const unsigned char *name;
813 umode_t mode;
814 struct v9fs_session_info *v9ses;
815 struct p9_fid *fid = NULL, *dfid = NULL;
816 struct inode *inode;
817 struct p9_qid qid;
818 struct posix_acl *dacl = NULL, *pacl = NULL;
819
820 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
821 dir->i_ino, dentry, omode,
822 MAJOR(rdev), MINOR(rdev));
823
824 v9ses = v9fs_inode2v9ses(dir);
825 dfid = v9fs_parent_fid(dentry);
826 if (IS_ERR(dfid)) {
827 err = PTR_ERR(dfid);
828 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
829 dfid = NULL;
830 goto error;
831 }
832
833 gid = v9fs_get_fsgid_for_create(dir);
834 mode = omode;
835
836 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
837 if (err) {
838 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
839 err);
840 goto error;
841 }
842 name = dentry->d_name.name;
843
844 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
845 if (err < 0)
846 goto error;
847
848 v9fs_invalidate_inode_attr(dir);
849 fid = p9_client_walk(dfid, 1, &name, 1);
850 if (IS_ERR(fid)) {
851 err = PTR_ERR(fid);
852 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
853 err);
854 fid = NULL;
855 goto error;
856 }
857
858
859 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
860 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
861 if (IS_ERR(inode)) {
862 err = PTR_ERR(inode);
863 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
864 err);
865 goto error;
866 }
867 v9fs_set_create_acl(inode, fid, dacl, pacl);
868 v9fs_fid_add(dentry, fid);
869 d_instantiate(dentry, inode);
870 fid = NULL;
871 err = 0;
872 } else {
873
874
875
876
877 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
878 if (IS_ERR(inode)) {
879 err = PTR_ERR(inode);
880 goto error;
881 }
882 v9fs_set_create_acl(inode, fid, dacl, pacl);
883 d_instantiate(dentry, inode);
884 }
885error:
886 if (fid)
887 p9_client_clunk(fid);
888 v9fs_put_acl(dacl, pacl);
889 return err;
890}
891
892
893
894
895
896
897
898
899static const char *
900v9fs_vfs_get_link_dotl(struct dentry *dentry,
901 struct inode *inode,
902 struct delayed_call *done)
903{
904 struct p9_fid *fid;
905 char *target;
906 int retval;
907
908 if (!dentry)
909 return ERR_PTR(-ECHILD);
910
911 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
912
913 fid = v9fs_fid_lookup(dentry);
914 if (IS_ERR(fid))
915 return ERR_CAST(fid);
916 retval = p9_client_readlink(fid, &target);
917 if (retval)
918 return ERR_PTR(retval);
919 set_delayed_call(done, kfree_link, target);
920 return target;
921}
922
923int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
924{
925 struct p9_stat_dotl *st;
926 struct v9fs_session_info *v9ses;
927 unsigned int flags;
928
929 v9ses = v9fs_inode2v9ses(inode);
930 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
931 if (IS_ERR(st))
932 return PTR_ERR(st);
933
934
935
936 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
937 goto out;
938
939
940
941
942
943 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
944 V9FS_STAT2INODE_KEEP_ISIZE : 0;
945 v9fs_stat2inode_dotl(st, inode, flags);
946out:
947 kfree(st);
948 return 0;
949}
950
951const struct inode_operations v9fs_dir_inode_operations_dotl = {
952 .create = v9fs_vfs_create_dotl,
953 .atomic_open = v9fs_vfs_atomic_open_dotl,
954 .lookup = v9fs_vfs_lookup,
955 .link = v9fs_vfs_link_dotl,
956 .symlink = v9fs_vfs_symlink_dotl,
957 .unlink = v9fs_vfs_unlink,
958 .mkdir = v9fs_vfs_mkdir_dotl,
959 .rmdir = v9fs_vfs_rmdir,
960 .mknod = v9fs_vfs_mknod_dotl,
961 .rename = v9fs_vfs_rename,
962 .getattr = v9fs_vfs_getattr_dotl,
963 .setattr = v9fs_vfs_setattr_dotl,
964 .listxattr = v9fs_listxattr,
965 .get_acl = v9fs_iop_get_acl,
966};
967
968const struct inode_operations v9fs_file_inode_operations_dotl = {
969 .getattr = v9fs_vfs_getattr_dotl,
970 .setattr = v9fs_vfs_setattr_dotl,
971 .listxattr = v9fs_listxattr,
972 .get_acl = v9fs_iop_get_acl,
973};
974
975const struct inode_operations v9fs_symlink_inode_operations_dotl = {
976 .get_link = v9fs_vfs_get_link_dotl,
977 .getattr = v9fs_vfs_getattr_dotl,
978 .setattr = v9fs_vfs_setattr_dotl,
979 .listxattr = v9fs_listxattr,
980};
981