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9#include <linux/module.h>
10#include <linux/errno.h>
11#include <linux/fs.h>
12#include <linux/file.h>
13#include <linux/pagemap.h>
14#include <linux/stat.h>
15#include <linux/string.h>
16#include <linux/inet.h>
17#include <linux/namei.h>
18#include <linux/idr.h>
19#include <linux/sched.h>
20#include <linux/slab.h>
21#include <linux/xattr.h>
22#include <linux/posix_acl.h>
23#include <net/9p/9p.h>
24#include <net/9p/client.h>
25
26#include "v9fs.h"
27#include "v9fs_vfs.h"
28#include "fid.h"
29#include "cache.h"
30#include "xattr.h"
31#include "acl.h"
32
33static int
34v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
35 struct dentry *dentry, umode_t omode, dev_t rdev);
36
37
38
39
40
41
42
43
44
45
46static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
47{
48 BUG_ON(dir_inode == NULL);
49
50 if (dir_inode->i_mode & S_ISGID) {
51
52 return dir_inode->i_gid;
53 }
54 return current_fsgid();
55}
56
57static int v9fs_test_inode_dotl(struct inode *inode, void *data)
58{
59 struct v9fs_inode *v9inode = V9FS_I(inode);
60 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
61
62
63 if (inode_wrong_type(inode, st->st_mode))
64 return 0;
65
66 if (inode->i_generation != st->st_gen)
67 return 0;
68
69
70 if (memcmp(&v9inode->qid.version,
71 &st->qid.version, sizeof(v9inode->qid.version)))
72 return 0;
73
74 if (v9inode->qid.type != st->qid.type)
75 return 0;
76
77 if (v9inode->qid.path != st->qid.path)
78 return 0;
79 return 1;
80}
81
82
83static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
84{
85 return 0;
86}
87
88static int v9fs_set_inode_dotl(struct inode *inode, void *data)
89{
90 struct v9fs_inode *v9inode = V9FS_I(inode);
91 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
92
93 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
94 inode->i_generation = st->st_gen;
95 return 0;
96}
97
98static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
99 struct p9_qid *qid,
100 struct p9_fid *fid,
101 struct p9_stat_dotl *st,
102 int new)
103{
104 int retval;
105 unsigned long i_ino;
106 struct inode *inode;
107 struct v9fs_session_info *v9ses = sb->s_fs_info;
108 int (*test)(struct inode *inode, void *data);
109
110 if (new)
111 test = v9fs_test_new_inode_dotl;
112 else
113 test = v9fs_test_inode_dotl;
114
115 i_ino = v9fs_qid2ino(qid);
116 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
117 if (!inode)
118 return ERR_PTR(-ENOMEM);
119 if (!(inode->i_state & I_NEW))
120 return inode;
121
122
123
124
125
126 inode->i_ino = i_ino;
127 retval = v9fs_init_inode(v9ses, inode,
128 st->st_mode, new_decode_dev(st->st_rdev));
129 if (retval)
130 goto error;
131
132 v9fs_stat2inode_dotl(st, inode, 0);
133 v9fs_cache_inode_get_cookie(inode);
134 retval = v9fs_get_acl(inode, fid);
135 if (retval)
136 goto error;
137
138 unlock_new_inode(inode);
139 return inode;
140error:
141 iget_failed(inode);
142 return ERR_PTR(retval);
143
144}
145
146struct inode *
147v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
148 struct super_block *sb, int new)
149{
150 struct p9_stat_dotl *st;
151 struct inode *inode = NULL;
152
153 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
154 if (IS_ERR(st))
155 return ERR_CAST(st);
156
157 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
158 kfree(st);
159 return inode;
160}
161
162struct dotl_openflag_map {
163 int open_flag;
164 int dotl_flag;
165};
166
167static int v9fs_mapped_dotl_flags(int flags)
168{
169 int i;
170 int rflags = 0;
171 struct dotl_openflag_map dotl_oflag_map[] = {
172 { O_CREAT, P9_DOTL_CREATE },
173 { O_EXCL, P9_DOTL_EXCL },
174 { O_NOCTTY, P9_DOTL_NOCTTY },
175 { O_APPEND, P9_DOTL_APPEND },
176 { O_NONBLOCK, P9_DOTL_NONBLOCK },
177 { O_DSYNC, P9_DOTL_DSYNC },
178 { FASYNC, P9_DOTL_FASYNC },
179 { O_DIRECT, P9_DOTL_DIRECT },
180 { O_LARGEFILE, P9_DOTL_LARGEFILE },
181 { O_DIRECTORY, P9_DOTL_DIRECTORY },
182 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
183 { O_NOATIME, P9_DOTL_NOATIME },
184 { O_CLOEXEC, P9_DOTL_CLOEXEC },
185 { O_SYNC, P9_DOTL_SYNC},
186 };
187 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
188 if (flags & dotl_oflag_map[i].open_flag)
189 rflags |= dotl_oflag_map[i].dotl_flag;
190 }
191 return rflags;
192}
193
194
195
196
197
198
199int v9fs_open_to_dotl_flags(int flags)
200{
201 int rflags = 0;
202
203
204
205
206
207 rflags |= flags & O_ACCMODE;
208 rflags |= v9fs_mapped_dotl_flags(flags);
209
210 return rflags;
211}
212
213
214
215
216
217
218
219
220
221
222static int
223v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir,
224 struct dentry *dentry, umode_t omode, bool excl)
225{
226 return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0);
227}
228
229static int
230v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
231 struct file *file, unsigned int flags, umode_t omode)
232{
233 int err = 0;
234 kgid_t gid;
235 umode_t mode;
236 const unsigned char *name = NULL;
237 struct p9_qid qid;
238 struct inode *inode;
239 struct p9_fid *fid = NULL;
240 struct v9fs_inode *v9inode;
241 struct p9_fid *dfid, *ofid, *inode_fid;
242 struct v9fs_session_info *v9ses;
243 struct posix_acl *pacl = NULL, *dacl = NULL;
244 struct dentry *res = NULL;
245
246 if (d_in_lookup(dentry)) {
247 res = v9fs_vfs_lookup(dir, dentry, 0);
248 if (IS_ERR(res))
249 return PTR_ERR(res);
250
251 if (res)
252 dentry = res;
253 }
254
255
256 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
257 return finish_no_open(file, res);
258
259 v9ses = v9fs_inode2v9ses(dir);
260
261 name = dentry->d_name.name;
262 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
263 name, flags, omode);
264
265 dfid = v9fs_parent_fid(dentry);
266 if (IS_ERR(dfid)) {
267 err = PTR_ERR(dfid);
268 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
269 goto out;
270 }
271
272
273 ofid = clone_fid(dfid);
274 if (IS_ERR(ofid)) {
275 err = PTR_ERR(ofid);
276 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
277 goto out;
278 }
279
280 gid = v9fs_get_fsgid_for_create(dir);
281
282 mode = omode;
283
284 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
285 if (err) {
286 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
287 err);
288 goto error;
289 }
290 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
291 mode, gid, &qid);
292 if (err < 0) {
293 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
294 err);
295 goto error;
296 }
297 v9fs_invalidate_inode_attr(dir);
298
299
300 fid = p9_client_walk(dfid, 1, &name, 1);
301 p9_client_clunk(dfid);
302 if (IS_ERR(fid)) {
303 err = PTR_ERR(fid);
304 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
305 fid = NULL;
306 goto error;
307 }
308 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
309 if (IS_ERR(inode)) {
310 err = PTR_ERR(inode);
311 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
312 goto error;
313 }
314
315 v9fs_set_create_acl(inode, fid, dacl, pacl);
316
317 v9fs_fid_add(dentry, fid);
318 d_instantiate(dentry, inode);
319
320 v9inode = V9FS_I(inode);
321 mutex_lock(&v9inode->v_mutex);
322 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
323 !v9inode->writeback_fid &&
324 ((flags & O_ACCMODE) != O_RDONLY)) {
325
326
327
328
329
330
331
332 inode_fid = v9fs_writeback_fid(dentry);
333 if (IS_ERR(inode_fid)) {
334 err = PTR_ERR(inode_fid);
335 mutex_unlock(&v9inode->v_mutex);
336 goto err_clunk_old_fid;
337 }
338 v9inode->writeback_fid = (void *) inode_fid;
339 }
340 mutex_unlock(&v9inode->v_mutex);
341
342 err = finish_open(file, dentry, generic_file_open);
343 if (err)
344 goto err_clunk_old_fid;
345 file->private_data = ofid;
346 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
347 fscache_use_cookie(v9fs_inode_cookie(v9inode),
348 file->f_mode & FMODE_WRITE);
349 v9fs_open_fid_add(inode, ofid);
350 file->f_mode |= FMODE_CREATED;
351out:
352 v9fs_put_acl(dacl, pacl);
353 dput(res);
354 return err;
355
356error:
357 if (fid)
358 p9_client_clunk(fid);
359err_clunk_old_fid:
360 if (ofid)
361 p9_client_clunk(ofid);
362 goto out;
363}
364
365
366
367
368
369
370
371
372
373
374static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns,
375 struct inode *dir, struct dentry *dentry,
376 umode_t omode)
377{
378 int err;
379 struct v9fs_session_info *v9ses;
380 struct p9_fid *fid = NULL, *dfid = NULL;
381 kgid_t gid;
382 const unsigned char *name;
383 umode_t mode;
384 struct inode *inode;
385 struct p9_qid qid;
386 struct posix_acl *dacl = NULL, *pacl = NULL;
387
388 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
389 err = 0;
390 v9ses = v9fs_inode2v9ses(dir);
391
392 omode |= S_IFDIR;
393 if (dir->i_mode & S_ISGID)
394 omode |= S_ISGID;
395
396 dfid = v9fs_parent_fid(dentry);
397 if (IS_ERR(dfid)) {
398 err = PTR_ERR(dfid);
399 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
400 dfid = NULL;
401 goto error;
402 }
403
404 gid = v9fs_get_fsgid_for_create(dir);
405 mode = omode;
406
407 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
408 if (err) {
409 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
410 err);
411 goto error;
412 }
413 name = dentry->d_name.name;
414 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
415 if (err < 0)
416 goto error;
417 fid = p9_client_walk(dfid, 1, &name, 1);
418 if (IS_ERR(fid)) {
419 err = PTR_ERR(fid);
420 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
421 err);
422 fid = NULL;
423 goto error;
424 }
425
426
427 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
428 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
429 if (IS_ERR(inode)) {
430 err = PTR_ERR(inode);
431 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
432 err);
433 goto error;
434 }
435 v9fs_fid_add(dentry, fid);
436 v9fs_set_create_acl(inode, fid, dacl, pacl);
437 d_instantiate(dentry, inode);
438 fid = NULL;
439 err = 0;
440 } else {
441
442
443
444
445
446 inode = v9fs_get_inode(dir->i_sb, mode, 0);
447 if (IS_ERR(inode)) {
448 err = PTR_ERR(inode);
449 goto error;
450 }
451 v9fs_set_create_acl(inode, fid, dacl, pacl);
452 d_instantiate(dentry, inode);
453 }
454 inc_nlink(dir);
455 v9fs_invalidate_inode_attr(dir);
456error:
457 if (fid)
458 p9_client_clunk(fid);
459 v9fs_put_acl(dacl, pacl);
460 p9_client_clunk(dfid);
461 return err;
462}
463
464static int
465v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns,
466 const struct path *path, struct kstat *stat,
467 u32 request_mask, unsigned int flags)
468{
469 struct dentry *dentry = path->dentry;
470 struct v9fs_session_info *v9ses;
471 struct p9_fid *fid;
472 struct p9_stat_dotl *st;
473
474 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
475 v9ses = v9fs_dentry2v9ses(dentry);
476 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
477 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
478 return 0;
479 }
480 fid = v9fs_fid_lookup(dentry);
481 if (IS_ERR(fid))
482 return PTR_ERR(fid);
483
484
485
486
487
488 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
489 p9_client_clunk(fid);
490 if (IS_ERR(st))
491 return PTR_ERR(st);
492
493 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
494 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
495
496 stat->blksize = st->st_blksize;
497
498 kfree(st);
499 return 0;
500}
501
502
503
504
505#define P9_ATTR_MODE (1 << 0)
506#define P9_ATTR_UID (1 << 1)
507#define P9_ATTR_GID (1 << 2)
508#define P9_ATTR_SIZE (1 << 3)
509#define P9_ATTR_ATIME (1 << 4)
510#define P9_ATTR_MTIME (1 << 5)
511#define P9_ATTR_CTIME (1 << 6)
512#define P9_ATTR_ATIME_SET (1 << 7)
513#define P9_ATTR_MTIME_SET (1 << 8)
514
515struct dotl_iattr_map {
516 int iattr_valid;
517 int p9_iattr_valid;
518};
519
520static int v9fs_mapped_iattr_valid(int iattr_valid)
521{
522 int i;
523 int p9_iattr_valid = 0;
524 struct dotl_iattr_map dotl_iattr_map[] = {
525 { ATTR_MODE, P9_ATTR_MODE },
526 { ATTR_UID, P9_ATTR_UID },
527 { ATTR_GID, P9_ATTR_GID },
528 { ATTR_SIZE, P9_ATTR_SIZE },
529 { ATTR_ATIME, P9_ATTR_ATIME },
530 { ATTR_MTIME, P9_ATTR_MTIME },
531 { ATTR_CTIME, P9_ATTR_CTIME },
532 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
533 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
534 };
535 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
536 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
537 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
538 }
539 return p9_iattr_valid;
540}
541
542
543
544
545
546
547
548
549
550int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns,
551 struct dentry *dentry, struct iattr *iattr)
552{
553 int retval, use_dentry = 0;
554 struct p9_fid *fid = NULL;
555 struct p9_iattr_dotl p9attr = {
556 .uid = INVALID_UID,
557 .gid = INVALID_GID,
558 };
559 struct inode *inode = d_inode(dentry);
560
561 p9_debug(P9_DEBUG_VFS, "\n");
562
563 retval = setattr_prepare(&init_user_ns, dentry, iattr);
564 if (retval)
565 return retval;
566
567 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
568 if (iattr->ia_valid & ATTR_MODE)
569 p9attr.mode = iattr->ia_mode;
570 if (iattr->ia_valid & ATTR_UID)
571 p9attr.uid = iattr->ia_uid;
572 if (iattr->ia_valid & ATTR_GID)
573 p9attr.gid = iattr->ia_gid;
574 if (iattr->ia_valid & ATTR_SIZE)
575 p9attr.size = iattr->ia_size;
576 if (iattr->ia_valid & ATTR_ATIME_SET) {
577 p9attr.atime_sec = iattr->ia_atime.tv_sec;
578 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
579 }
580 if (iattr->ia_valid & ATTR_MTIME_SET) {
581 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
582 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
583 }
584
585 if (iattr->ia_valid & ATTR_FILE) {
586 fid = iattr->ia_file->private_data;
587 WARN_ON(!fid);
588 }
589 if (!fid) {
590 fid = v9fs_fid_lookup(dentry);
591 use_dentry = 1;
592 }
593 if (IS_ERR(fid))
594 return PTR_ERR(fid);
595
596
597 if (S_ISREG(inode->i_mode))
598 filemap_write_and_wait(inode->i_mapping);
599
600 retval = p9_client_setattr(fid, &p9attr);
601 if (retval < 0) {
602 if (use_dentry)
603 p9_client_clunk(fid);
604 return retval;
605 }
606
607 if ((iattr->ia_valid & ATTR_SIZE) &&
608 iattr->ia_size != i_size_read(inode))
609 truncate_setsize(inode, iattr->ia_size);
610
611 v9fs_invalidate_inode_attr(inode);
612 setattr_copy(&init_user_ns, inode, iattr);
613 mark_inode_dirty(inode);
614 if (iattr->ia_valid & ATTR_MODE) {
615
616 retval = v9fs_acl_chmod(inode, fid);
617 if (retval < 0) {
618 if (use_dentry)
619 p9_client_clunk(fid);
620 return retval;
621 }
622 }
623 if (use_dentry)
624 p9_client_clunk(fid);
625
626 return 0;
627}
628
629
630
631
632
633
634
635
636
637void
638v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
639 unsigned int flags)
640{
641 umode_t mode;
642 struct v9fs_inode *v9inode = V9FS_I(inode);
643
644 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
645 inode->i_atime.tv_sec = stat->st_atime_sec;
646 inode->i_atime.tv_nsec = stat->st_atime_nsec;
647 inode->i_mtime.tv_sec = stat->st_mtime_sec;
648 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
649 inode->i_ctime.tv_sec = stat->st_ctime_sec;
650 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
651 inode->i_uid = stat->st_uid;
652 inode->i_gid = stat->st_gid;
653 set_nlink(inode, stat->st_nlink);
654
655 mode = stat->st_mode & S_IALLUGO;
656 mode |= inode->i_mode & ~S_IALLUGO;
657 inode->i_mode = mode;
658
659 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
660 v9fs_i_size_write(inode, stat->st_size);
661 inode->i_blocks = stat->st_blocks;
662 } else {
663 if (stat->st_result_mask & P9_STATS_ATIME) {
664 inode->i_atime.tv_sec = stat->st_atime_sec;
665 inode->i_atime.tv_nsec = stat->st_atime_nsec;
666 }
667 if (stat->st_result_mask & P9_STATS_MTIME) {
668 inode->i_mtime.tv_sec = stat->st_mtime_sec;
669 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
670 }
671 if (stat->st_result_mask & P9_STATS_CTIME) {
672 inode->i_ctime.tv_sec = stat->st_ctime_sec;
673 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
674 }
675 if (stat->st_result_mask & P9_STATS_UID)
676 inode->i_uid = stat->st_uid;
677 if (stat->st_result_mask & P9_STATS_GID)
678 inode->i_gid = stat->st_gid;
679 if (stat->st_result_mask & P9_STATS_NLINK)
680 set_nlink(inode, stat->st_nlink);
681 if (stat->st_result_mask & P9_STATS_MODE) {
682 mode = stat->st_mode & S_IALLUGO;
683 mode |= inode->i_mode & ~S_IALLUGO;
684 inode->i_mode = mode;
685 }
686 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
687 stat->st_result_mask & P9_STATS_SIZE)
688 v9fs_i_size_write(inode, stat->st_size);
689 if (stat->st_result_mask & P9_STATS_BLOCKS)
690 inode->i_blocks = stat->st_blocks;
691 }
692 if (stat->st_result_mask & P9_STATS_GEN)
693 inode->i_generation = stat->st_gen;
694
695
696
697
698 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
699}
700
701static int
702v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir,
703 struct dentry *dentry, const char *symname)
704{
705 int err;
706 kgid_t gid;
707 const unsigned char *name;
708 struct p9_qid qid;
709 struct inode *inode;
710 struct p9_fid *dfid;
711 struct p9_fid *fid = NULL;
712 struct v9fs_session_info *v9ses;
713
714 name = dentry->d_name.name;
715 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
716 v9ses = v9fs_inode2v9ses(dir);
717
718 dfid = v9fs_parent_fid(dentry);
719 if (IS_ERR(dfid)) {
720 err = PTR_ERR(dfid);
721 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
722 return err;
723 }
724
725 gid = v9fs_get_fsgid_for_create(dir);
726
727
728 err = p9_client_symlink(dfid, name, symname, gid, &qid);
729
730 if (err < 0) {
731 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
732 goto error;
733 }
734
735 v9fs_invalidate_inode_attr(dir);
736 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
737
738 fid = p9_client_walk(dfid, 1, &name, 1);
739 if (IS_ERR(fid)) {
740 err = PTR_ERR(fid);
741 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
742 err);
743 fid = NULL;
744 goto error;
745 }
746
747
748 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
749 if (IS_ERR(inode)) {
750 err = PTR_ERR(inode);
751 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
752 err);
753 goto error;
754 }
755 v9fs_fid_add(dentry, fid);
756 d_instantiate(dentry, inode);
757 fid = NULL;
758 err = 0;
759 } else {
760
761 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
762 if (IS_ERR(inode)) {
763 err = PTR_ERR(inode);
764 goto error;
765 }
766 d_instantiate(dentry, inode);
767 }
768
769error:
770 if (fid)
771 p9_client_clunk(fid);
772
773 p9_client_clunk(dfid);
774 return err;
775}
776
777
778
779
780
781
782
783
784
785static int
786v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
787 struct dentry *dentry)
788{
789 int err;
790 struct p9_fid *dfid, *oldfid;
791 struct v9fs_session_info *v9ses;
792
793 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
794 dir->i_ino, old_dentry, dentry);
795
796 v9ses = v9fs_inode2v9ses(dir);
797 dfid = v9fs_parent_fid(dentry);
798 if (IS_ERR(dfid))
799 return PTR_ERR(dfid);
800
801 oldfid = v9fs_fid_lookup(old_dentry);
802 if (IS_ERR(oldfid)) {
803 p9_client_clunk(dfid);
804 return PTR_ERR(oldfid);
805 }
806
807 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
808
809 p9_client_clunk(dfid);
810 p9_client_clunk(oldfid);
811 if (err < 0) {
812 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
813 return err;
814 }
815
816 v9fs_invalidate_inode_attr(dir);
817 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
818
819 struct p9_fid *fid;
820
821 fid = v9fs_fid_lookup(old_dentry);
822 if (IS_ERR(fid))
823 return PTR_ERR(fid);
824
825 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
826 p9_client_clunk(fid);
827 }
828 ihold(d_inode(old_dentry));
829 d_instantiate(dentry, d_inode(old_dentry));
830
831 return err;
832}
833
834
835
836
837
838
839
840
841
842
843static int
844v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
845 struct dentry *dentry, umode_t omode, dev_t rdev)
846{
847 int err;
848 kgid_t gid;
849 const unsigned char *name;
850 umode_t mode;
851 struct v9fs_session_info *v9ses;
852 struct p9_fid *fid = NULL, *dfid = NULL;
853 struct inode *inode;
854 struct p9_qid qid;
855 struct posix_acl *dacl = NULL, *pacl = NULL;
856
857 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
858 dir->i_ino, dentry, omode,
859 MAJOR(rdev), MINOR(rdev));
860
861 v9ses = v9fs_inode2v9ses(dir);
862 dfid = v9fs_parent_fid(dentry);
863 if (IS_ERR(dfid)) {
864 err = PTR_ERR(dfid);
865 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
866 dfid = NULL;
867 goto error;
868 }
869
870 gid = v9fs_get_fsgid_for_create(dir);
871 mode = omode;
872
873 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
874 if (err) {
875 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
876 err);
877 goto error;
878 }
879 name = dentry->d_name.name;
880
881 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
882 if (err < 0)
883 goto error;
884
885 v9fs_invalidate_inode_attr(dir);
886 fid = p9_client_walk(dfid, 1, &name, 1);
887 if (IS_ERR(fid)) {
888 err = PTR_ERR(fid);
889 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
890 err);
891 fid = NULL;
892 goto error;
893 }
894
895
896 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
897 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
898 if (IS_ERR(inode)) {
899 err = PTR_ERR(inode);
900 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
901 err);
902 goto error;
903 }
904 v9fs_set_create_acl(inode, fid, dacl, pacl);
905 v9fs_fid_add(dentry, fid);
906 d_instantiate(dentry, inode);
907 fid = NULL;
908 err = 0;
909 } else {
910
911
912
913
914 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
915 if (IS_ERR(inode)) {
916 err = PTR_ERR(inode);
917 goto error;
918 }
919 v9fs_set_create_acl(inode, fid, dacl, pacl);
920 d_instantiate(dentry, inode);
921 }
922error:
923 if (fid)
924 p9_client_clunk(fid);
925 v9fs_put_acl(dacl, pacl);
926 p9_client_clunk(dfid);
927
928 return err;
929}
930
931
932
933
934
935
936
937
938static const char *
939v9fs_vfs_get_link_dotl(struct dentry *dentry,
940 struct inode *inode,
941 struct delayed_call *done)
942{
943 struct p9_fid *fid;
944 char *target;
945 int retval;
946
947 if (!dentry)
948 return ERR_PTR(-ECHILD);
949
950 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
951
952 fid = v9fs_fid_lookup(dentry);
953 if (IS_ERR(fid))
954 return ERR_CAST(fid);
955 retval = p9_client_readlink(fid, &target);
956 p9_client_clunk(fid);
957 if (retval)
958 return ERR_PTR(retval);
959 set_delayed_call(done, kfree_link, target);
960 return target;
961}
962
963int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
964{
965 struct p9_stat_dotl *st;
966 struct v9fs_session_info *v9ses;
967 unsigned int flags;
968
969 v9ses = v9fs_inode2v9ses(inode);
970 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
971 if (IS_ERR(st))
972 return PTR_ERR(st);
973
974
975
976 if (inode_wrong_type(inode, st->st_mode))
977 goto out;
978
979
980
981
982
983 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
984 V9FS_STAT2INODE_KEEP_ISIZE : 0;
985 v9fs_stat2inode_dotl(st, inode, flags);
986out:
987 kfree(st);
988 return 0;
989}
990
991const struct inode_operations v9fs_dir_inode_operations_dotl = {
992 .create = v9fs_vfs_create_dotl,
993 .atomic_open = v9fs_vfs_atomic_open_dotl,
994 .lookup = v9fs_vfs_lookup,
995 .link = v9fs_vfs_link_dotl,
996 .symlink = v9fs_vfs_symlink_dotl,
997 .unlink = v9fs_vfs_unlink,
998 .mkdir = v9fs_vfs_mkdir_dotl,
999 .rmdir = v9fs_vfs_rmdir,
1000 .mknod = v9fs_vfs_mknod_dotl,
1001 .rename = v9fs_vfs_rename,
1002 .getattr = v9fs_vfs_getattr_dotl,
1003 .setattr = v9fs_vfs_setattr_dotl,
1004 .listxattr = v9fs_listxattr,
1005 .get_acl = v9fs_iop_get_acl,
1006};
1007
1008const struct inode_operations v9fs_file_inode_operations_dotl = {
1009 .getattr = v9fs_vfs_getattr_dotl,
1010 .setattr = v9fs_vfs_setattr_dotl,
1011 .listxattr = v9fs_listxattr,
1012 .get_acl = v9fs_iop_get_acl,
1013};
1014
1015const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1016 .get_link = v9fs_vfs_get_link_dotl,
1017 .getattr = v9fs_vfs_getattr_dotl,
1018 .setattr = v9fs_vfs_setattr_dotl,
1019 .listxattr = v9fs_listxattr,
1020};
1021