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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This file contains vfs inode ops for the 9P2000.L protocol.
4 *
5 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
6 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
7 */
8
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/sched.h>
19#include <linux/slab.h>
20#include <linux/xattr.h>
21#include <linux/posix_acl.h>
22#include <net/9p/9p.h>
23#include <net/9p/client.h>
24
25#include "v9fs.h"
26#include "v9fs_vfs.h"
27#include "fid.h"
28#include "cache.h"
29#include "xattr.h"
30#include "acl.h"
31
32static int
33v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
34 struct dentry *dentry, umode_t omode, dev_t rdev);
35
36/**
37 * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
38 * @dir_inode: The directory inode
39 *
40 * Helper function to get the gid for creating a
41 * new file system object. This checks the S_ISGID to determine the owning
42 * group of the new file system object.
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 /* set_gid bit is set.*/
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 /* don't match inode of different type */
62 if (inode_wrong_type(inode, st->st_mode))
63 return 0;
64
65 if (inode->i_generation != st->st_gen)
66 return 0;
67
68 /* compare qid details */
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/* Always get a new inode */
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 *inode, void *data);
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 * initialize the inode with the stat info
122 * FIXME!! we may need support for stale inodes
123 * later.
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 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
195 * plan 9 open flag.
196 * @flags: flags to convert
197 */
198int v9fs_open_to_dotl_flags(int flags)
199{
200 int rflags = 0;
201
202 /*
203 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
204 * and P9_DOTL_NOACCESS
205 */
206 rflags |= flags & O_ACCMODE;
207 rflags |= v9fs_mapped_dotl_flags(flags);
208
209 return rflags;
210}
211
212/**
213 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
214 * @mnt_userns: The user namespace of the mount
215 * @dir: directory inode that is being created
216 * @dentry: dentry that is being deleted
217 * @omode: create permissions
218 * @excl: True if the file must not yet exist
219 *
220 */
221static int
222v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir,
223 struct dentry *dentry, umode_t omode, bool excl)
224{
225 return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0);
226}
227
228static int
229v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
230 struct file *file, unsigned int flags, umode_t omode)
231{
232 int err = 0;
233 kgid_t gid;
234 umode_t mode;
235 const unsigned char *name = NULL;
236 struct p9_qid qid;
237 struct inode *inode;
238 struct p9_fid *fid = NULL;
239 struct v9fs_inode *v9inode;
240 struct p9_fid *dfid = NULL, *ofid = NULL, *inode_fid = NULL;
241 struct v9fs_session_info *v9ses;
242 struct posix_acl *pacl = NULL, *dacl = NULL;
243 struct dentry *res = NULL;
244
245 if (d_in_lookup(dentry)) {
246 res = v9fs_vfs_lookup(dir, dentry, 0);
247 if (IS_ERR(res))
248 return PTR_ERR(res);
249
250 if (res)
251 dentry = res;
252 }
253
254 /* Only creates */
255 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
256 return finish_no_open(file, res);
257
258 v9ses = v9fs_inode2v9ses(dir);
259
260 name = dentry->d_name.name;
261 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
262 name, flags, omode);
263
264 dfid = v9fs_parent_fid(dentry);
265 if (IS_ERR(dfid)) {
266 err = PTR_ERR(dfid);
267 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
268 goto out;
269 }
270
271 /* clone a fid to use for creation */
272 ofid = clone_fid(dfid);
273 if (IS_ERR(ofid)) {
274 err = PTR_ERR(ofid);
275 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
276 goto out;
277 }
278
279 gid = v9fs_get_fsgid_for_create(dir);
280
281 mode = omode;
282 /* Update mode based on ACL value */
283 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
284 if (err) {
285 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
286 err);
287 goto out;
288 }
289 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
290 mode, gid, &qid);
291 if (err < 0) {
292 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
293 err);
294 goto out;
295 }
296 v9fs_invalidate_inode_attr(dir);
297
298 /* instantiate inode and assign the unopened fid to the dentry */
299 fid = p9_client_walk(dfid, 1, &name, 1);
300 if (IS_ERR(fid)) {
301 err = PTR_ERR(fid);
302 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
303 goto out;
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 out;
310 }
311 /* Now set the ACL based on the default value */
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 * clone a fid and add it to writeback_fid
324 * we do it during open time instead of
325 * page dirty time via write_begin/page_mkwrite
326 * because we want write after unlink usecase
327 * to work.
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 out;
334 }
335 v9inode->writeback_fid = (void *) inode_fid;
336 }
337 mutex_unlock(&v9inode->v_mutex);
338 /* Since we are opening a file, assign the open fid to the file */
339 err = finish_open(file, dentry, generic_file_open);
340 if (err)
341 goto out;
342 file->private_data = ofid;
343 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
344 fscache_use_cookie(v9fs_inode_cookie(v9inode),
345 file->f_mode & FMODE_WRITE);
346 v9fs_open_fid_add(inode, &ofid);
347 file->f_mode |= FMODE_CREATED;
348out:
349 p9_fid_put(dfid);
350 p9_fid_put(ofid);
351 p9_fid_put(fid);
352 v9fs_put_acl(dacl, pacl);
353 dput(res);
354 return err;
355}
356
357/**
358 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
359 * @mnt_userns: The user namespace of the mount
360 * @dir: inode that is being unlinked
361 * @dentry: dentry that is being unlinked
362 * @omode: mode for new directory
363 *
364 */
365
366static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns,
367 struct inode *dir, struct dentry *dentry,
368 umode_t omode)
369{
370 int err;
371 struct v9fs_session_info *v9ses;
372 struct p9_fid *fid = NULL, *dfid = NULL;
373 kgid_t gid;
374 const unsigned char *name;
375 umode_t mode;
376 struct inode *inode;
377 struct p9_qid qid;
378 struct posix_acl *dacl = NULL, *pacl = NULL;
379
380 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
381 err = 0;
382 v9ses = v9fs_inode2v9ses(dir);
383
384 omode |= S_IFDIR;
385 if (dir->i_mode & S_ISGID)
386 omode |= S_ISGID;
387
388 dfid = v9fs_parent_fid(dentry);
389 if (IS_ERR(dfid)) {
390 err = PTR_ERR(dfid);
391 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
392 goto error;
393 }
394
395 gid = v9fs_get_fsgid_for_create(dir);
396 mode = omode;
397 /* Update mode based on ACL value */
398 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
399 if (err) {
400 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
401 err);
402 goto error;
403 }
404 name = dentry->d_name.name;
405 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
406 if (err < 0)
407 goto error;
408 fid = p9_client_walk(dfid, 1, &name, 1);
409 if (IS_ERR(fid)) {
410 err = PTR_ERR(fid);
411 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
412 err);
413 goto error;
414 }
415
416 /* instantiate inode and assign the unopened fid to the dentry */
417 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
418 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
419 if (IS_ERR(inode)) {
420 err = PTR_ERR(inode);
421 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
422 err);
423 goto error;
424 }
425 v9fs_fid_add(dentry, &fid);
426 v9fs_set_create_acl(inode, fid, dacl, pacl);
427 d_instantiate(dentry, inode);
428 err = 0;
429 } else {
430 /*
431 * Not in cached mode. No need to populate
432 * inode with stat. We need to get an inode
433 * so that we can set the acl with dentry
434 */
435 inode = v9fs_get_inode(dir->i_sb, mode, 0);
436 if (IS_ERR(inode)) {
437 err = PTR_ERR(inode);
438 goto error;
439 }
440 v9fs_set_create_acl(inode, fid, dacl, pacl);
441 d_instantiate(dentry, inode);
442 }
443 inc_nlink(dir);
444 v9fs_invalidate_inode_attr(dir);
445error:
446 p9_fid_put(fid);
447 v9fs_put_acl(dacl, pacl);
448 p9_fid_put(dfid);
449 return err;
450}
451
452static int
453v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns,
454 const struct path *path, struct kstat *stat,
455 u32 request_mask, unsigned int flags)
456{
457 struct dentry *dentry = path->dentry;
458 struct v9fs_session_info *v9ses;
459 struct p9_fid *fid;
460 struct p9_stat_dotl *st;
461
462 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
463 v9ses = v9fs_dentry2v9ses(dentry);
464 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
465 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
466 return 0;
467 }
468 fid = v9fs_fid_lookup(dentry);
469 if (IS_ERR(fid))
470 return PTR_ERR(fid);
471
472 /* Ask for all the fields in stat structure. Server will return
473 * whatever it supports
474 */
475
476 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
477 p9_fid_put(fid);
478 if (IS_ERR(st))
479 return PTR_ERR(st);
480
481 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
482 generic_fillattr(&init_user_ns, d_inode(dentry), stat);
483 /* Change block size to what the server returned */
484 stat->blksize = st->st_blksize;
485
486 kfree(st);
487 return 0;
488}
489
490/*
491 * Attribute flags.
492 */
493#define P9_ATTR_MODE (1 << 0)
494#define P9_ATTR_UID (1 << 1)
495#define P9_ATTR_GID (1 << 2)
496#define P9_ATTR_SIZE (1 << 3)
497#define P9_ATTR_ATIME (1 << 4)
498#define P9_ATTR_MTIME (1 << 5)
499#define P9_ATTR_CTIME (1 << 6)
500#define P9_ATTR_ATIME_SET (1 << 7)
501#define P9_ATTR_MTIME_SET (1 << 8)
502
503struct dotl_iattr_map {
504 int iattr_valid;
505 int p9_iattr_valid;
506};
507
508static int v9fs_mapped_iattr_valid(int iattr_valid)
509{
510 int i;
511 int p9_iattr_valid = 0;
512 struct dotl_iattr_map dotl_iattr_map[] = {
513 { ATTR_MODE, P9_ATTR_MODE },
514 { ATTR_UID, P9_ATTR_UID },
515 { ATTR_GID, P9_ATTR_GID },
516 { ATTR_SIZE, P9_ATTR_SIZE },
517 { ATTR_ATIME, P9_ATTR_ATIME },
518 { ATTR_MTIME, P9_ATTR_MTIME },
519 { ATTR_CTIME, P9_ATTR_CTIME },
520 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
521 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
522 };
523 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
524 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
525 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
526 }
527 return p9_iattr_valid;
528}
529
530/**
531 * v9fs_vfs_setattr_dotl - set file metadata
532 * @mnt_userns: The user namespace of the mount
533 * @dentry: file whose metadata to set
534 * @iattr: metadata assignment structure
535 *
536 */
537
538int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns,
539 struct dentry *dentry, struct iattr *iattr)
540{
541 int retval, use_dentry = 0;
542 struct p9_fid *fid = NULL;
543 struct p9_iattr_dotl p9attr = {
544 .uid = INVALID_UID,
545 .gid = INVALID_GID,
546 };
547 struct inode *inode = d_inode(dentry);
548
549 p9_debug(P9_DEBUG_VFS, "\n");
550
551 retval = setattr_prepare(&init_user_ns, dentry, iattr);
552 if (retval)
553 return retval;
554
555 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
556 if (iattr->ia_valid & ATTR_MODE)
557 p9attr.mode = iattr->ia_mode;
558 if (iattr->ia_valid & ATTR_UID)
559 p9attr.uid = iattr->ia_uid;
560 if (iattr->ia_valid & ATTR_GID)
561 p9attr.gid = iattr->ia_gid;
562 if (iattr->ia_valid & ATTR_SIZE)
563 p9attr.size = iattr->ia_size;
564 if (iattr->ia_valid & ATTR_ATIME_SET) {
565 p9attr.atime_sec = iattr->ia_atime.tv_sec;
566 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
567 }
568 if (iattr->ia_valid & ATTR_MTIME_SET) {
569 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
570 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
571 }
572
573 if (iattr->ia_valid & ATTR_FILE) {
574 fid = iattr->ia_file->private_data;
575 WARN_ON(!fid);
576 }
577 if (!fid) {
578 fid = v9fs_fid_lookup(dentry);
579 use_dentry = 1;
580 }
581 if (IS_ERR(fid))
582 return PTR_ERR(fid);
583
584 /* Write all dirty data */
585 if (S_ISREG(inode->i_mode))
586 filemap_write_and_wait(inode->i_mapping);
587
588 retval = p9_client_setattr(fid, &p9attr);
589 if (retval < 0) {
590 if (use_dentry)
591 p9_fid_put(fid);
592 return retval;
593 }
594
595 if ((iattr->ia_valid & ATTR_SIZE) &&
596 iattr->ia_size != i_size_read(inode))
597 truncate_setsize(inode, iattr->ia_size);
598
599 v9fs_invalidate_inode_attr(inode);
600 setattr_copy(&init_user_ns, inode, iattr);
601 mark_inode_dirty(inode);
602 if (iattr->ia_valid & ATTR_MODE) {
603 /* We also want to update ACL when we update mode bits */
604 retval = v9fs_acl_chmod(inode, fid);
605 if (retval < 0) {
606 if (use_dentry)
607 p9_fid_put(fid);
608 return retval;
609 }
610 }
611 if (use_dentry)
612 p9_fid_put(fid);
613
614 return 0;
615}
616
617/**
618 * v9fs_stat2inode_dotl - populate an inode structure with stat info
619 * @stat: stat structure
620 * @inode: inode to populate
621 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
622 *
623 */
624
625void
626v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
627 unsigned int flags)
628{
629 umode_t mode;
630 struct v9fs_inode *v9inode = V9FS_I(inode);
631
632 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
633 inode->i_atime.tv_sec = stat->st_atime_sec;
634 inode->i_atime.tv_nsec = stat->st_atime_nsec;
635 inode->i_mtime.tv_sec = stat->st_mtime_sec;
636 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
637 inode->i_ctime.tv_sec = stat->st_ctime_sec;
638 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
639 inode->i_uid = stat->st_uid;
640 inode->i_gid = stat->st_gid;
641 set_nlink(inode, stat->st_nlink);
642
643 mode = stat->st_mode & S_IALLUGO;
644 mode |= inode->i_mode & ~S_IALLUGO;
645 inode->i_mode = mode;
646
647 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
648 v9fs_i_size_write(inode, stat->st_size);
649 inode->i_blocks = stat->st_blocks;
650 } else {
651 if (stat->st_result_mask & P9_STATS_ATIME) {
652 inode->i_atime.tv_sec = stat->st_atime_sec;
653 inode->i_atime.tv_nsec = stat->st_atime_nsec;
654 }
655 if (stat->st_result_mask & P9_STATS_MTIME) {
656 inode->i_mtime.tv_sec = stat->st_mtime_sec;
657 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
658 }
659 if (stat->st_result_mask & P9_STATS_CTIME) {
660 inode->i_ctime.tv_sec = stat->st_ctime_sec;
661 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
662 }
663 if (stat->st_result_mask & P9_STATS_UID)
664 inode->i_uid = stat->st_uid;
665 if (stat->st_result_mask & P9_STATS_GID)
666 inode->i_gid = stat->st_gid;
667 if (stat->st_result_mask & P9_STATS_NLINK)
668 set_nlink(inode, stat->st_nlink);
669 if (stat->st_result_mask & P9_STATS_MODE) {
670 mode = stat->st_mode & S_IALLUGO;
671 mode |= inode->i_mode & ~S_IALLUGO;
672 inode->i_mode = mode;
673 }
674 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
675 stat->st_result_mask & P9_STATS_SIZE)
676 v9fs_i_size_write(inode, stat->st_size);
677 if (stat->st_result_mask & P9_STATS_BLOCKS)
678 inode->i_blocks = stat->st_blocks;
679 }
680 if (stat->st_result_mask & P9_STATS_GEN)
681 inode->i_generation = stat->st_gen;
682
683 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
684 * because the inode structure does not have fields for them.
685 */
686 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
687}
688
689static int
690v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir,
691 struct dentry *dentry, const char *symname)
692{
693 int err;
694 kgid_t gid;
695 const unsigned char *name;
696 struct p9_qid qid;
697 struct inode *inode;
698 struct p9_fid *dfid;
699 struct p9_fid *fid = NULL;
700 struct v9fs_session_info *v9ses;
701
702 name = dentry->d_name.name;
703 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
704 v9ses = v9fs_inode2v9ses(dir);
705
706 dfid = v9fs_parent_fid(dentry);
707 if (IS_ERR(dfid)) {
708 err = PTR_ERR(dfid);
709 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
710 return err;
711 }
712
713 gid = v9fs_get_fsgid_for_create(dir);
714
715 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
716 err = p9_client_symlink(dfid, name, symname, gid, &qid);
717
718 if (err < 0) {
719 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
720 goto error;
721 }
722
723 v9fs_invalidate_inode_attr(dir);
724 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
725 /* Now walk from the parent so we can get an unopened fid. */
726 fid = p9_client_walk(dfid, 1, &name, 1);
727 if (IS_ERR(fid)) {
728 err = PTR_ERR(fid);
729 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
730 err);
731 goto error;
732 }
733
734 /* instantiate inode and assign the unopened fid to dentry */
735 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
736 if (IS_ERR(inode)) {
737 err = PTR_ERR(inode);
738 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
739 err);
740 goto error;
741 }
742 v9fs_fid_add(dentry, &fid);
743 d_instantiate(dentry, inode);
744 err = 0;
745 } else {
746 /* Not in cached mode. No need to populate inode with stat */
747 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
748 if (IS_ERR(inode)) {
749 err = PTR_ERR(inode);
750 goto error;
751 }
752 d_instantiate(dentry, inode);
753 }
754
755error:
756 p9_fid_put(fid);
757 p9_fid_put(dfid);
758 return err;
759}
760
761/**
762 * v9fs_vfs_link_dotl - create a hardlink for dotl
763 * @old_dentry: dentry for file to link to
764 * @dir: inode destination for new link
765 * @dentry: dentry for link
766 *
767 */
768
769static int
770v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
771 struct dentry *dentry)
772{
773 int err;
774 struct p9_fid *dfid, *oldfid;
775 struct v9fs_session_info *v9ses;
776
777 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
778 dir->i_ino, old_dentry, dentry);
779
780 v9ses = v9fs_inode2v9ses(dir);
781 dfid = v9fs_parent_fid(dentry);
782 if (IS_ERR(dfid))
783 return PTR_ERR(dfid);
784
785 oldfid = v9fs_fid_lookup(old_dentry);
786 if (IS_ERR(oldfid)) {
787 p9_fid_put(dfid);
788 return PTR_ERR(oldfid);
789 }
790
791 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
792
793 p9_fid_put(dfid);
794 p9_fid_put(oldfid);
795 if (err < 0) {
796 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
797 return err;
798 }
799
800 v9fs_invalidate_inode_attr(dir);
801 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
802 /* Get the latest stat info from server. */
803 struct p9_fid *fid;
804
805 fid = v9fs_fid_lookup(old_dentry);
806 if (IS_ERR(fid))
807 return PTR_ERR(fid);
808
809 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
810 p9_fid_put(fid);
811 }
812 ihold(d_inode(old_dentry));
813 d_instantiate(dentry, d_inode(old_dentry));
814
815 return err;
816}
817
818/**
819 * v9fs_vfs_mknod_dotl - create a special file
820 * @mnt_userns: The user namespace of the mount
821 * @dir: inode destination for new link
822 * @dentry: dentry for file
823 * @omode: mode for creation
824 * @rdev: device associated with special file
825 *
826 */
827static int
828v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir,
829 struct dentry *dentry, umode_t omode, dev_t rdev)
830{
831 int err;
832 kgid_t gid;
833 const unsigned char *name;
834 umode_t mode;
835 struct v9fs_session_info *v9ses;
836 struct p9_fid *fid = NULL, *dfid = NULL;
837 struct inode *inode;
838 struct p9_qid qid;
839 struct posix_acl *dacl = NULL, *pacl = NULL;
840
841 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
842 dir->i_ino, dentry, omode,
843 MAJOR(rdev), MINOR(rdev));
844
845 v9ses = v9fs_inode2v9ses(dir);
846 dfid = v9fs_parent_fid(dentry);
847 if (IS_ERR(dfid)) {
848 err = PTR_ERR(dfid);
849 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
850 goto error;
851 }
852
853 gid = v9fs_get_fsgid_for_create(dir);
854 mode = omode;
855 /* Update mode based on ACL value */
856 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
857 if (err) {
858 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
859 err);
860 goto error;
861 }
862 name = dentry->d_name.name;
863
864 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
865 if (err < 0)
866 goto error;
867
868 v9fs_invalidate_inode_attr(dir);
869 fid = p9_client_walk(dfid, 1, &name, 1);
870 if (IS_ERR(fid)) {
871 err = PTR_ERR(fid);
872 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
873 err);
874 goto error;
875 }
876
877 /* instantiate inode and assign the unopened fid to the dentry */
878 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
879 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
880 if (IS_ERR(inode)) {
881 err = PTR_ERR(inode);
882 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
883 err);
884 goto error;
885 }
886 v9fs_set_create_acl(inode, fid, dacl, pacl);
887 v9fs_fid_add(dentry, &fid);
888 d_instantiate(dentry, inode);
889 err = 0;
890 } else {
891 /*
892 * Not in cached mode. No need to populate inode with stat.
893 * socket syscall returns a fd, so we need instantiate
894 */
895 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
896 if (IS_ERR(inode)) {
897 err = PTR_ERR(inode);
898 goto error;
899 }
900 v9fs_set_create_acl(inode, fid, dacl, pacl);
901 d_instantiate(dentry, inode);
902 }
903error:
904 p9_fid_put(fid);
905 v9fs_put_acl(dacl, pacl);
906 p9_fid_put(dfid);
907
908 return err;
909}
910
911/**
912 * v9fs_vfs_get_link_dotl - follow a symlink path
913 * @dentry: dentry for symlink
914 * @inode: inode for symlink
915 * @done: destructor for return value
916 */
917
918static const char *
919v9fs_vfs_get_link_dotl(struct dentry *dentry,
920 struct inode *inode,
921 struct delayed_call *done)
922{
923 struct p9_fid *fid;
924 char *target;
925 int retval;
926
927 if (!dentry)
928 return ERR_PTR(-ECHILD);
929
930 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
931
932 fid = v9fs_fid_lookup(dentry);
933 if (IS_ERR(fid))
934 return ERR_CAST(fid);
935 retval = p9_client_readlink(fid, &target);
936 p9_fid_put(fid);
937 if (retval)
938 return ERR_PTR(retval);
939 set_delayed_call(done, kfree_link, target);
940 return target;
941}
942
943int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
944{
945 struct p9_stat_dotl *st;
946 struct v9fs_session_info *v9ses;
947 unsigned int flags;
948
949 v9ses = v9fs_inode2v9ses(inode);
950 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
951 if (IS_ERR(st))
952 return PTR_ERR(st);
953 /*
954 * Don't update inode if the file type is different
955 */
956 if (inode_wrong_type(inode, st->st_mode))
957 goto out;
958
959 /*
960 * We don't want to refresh inode->i_size,
961 * because we may have cached data
962 */
963 flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
964 V9FS_STAT2INODE_KEEP_ISIZE : 0;
965 v9fs_stat2inode_dotl(st, inode, flags);
966out:
967 kfree(st);
968 return 0;
969}
970
971const struct inode_operations v9fs_dir_inode_operations_dotl = {
972 .create = v9fs_vfs_create_dotl,
973 .atomic_open = v9fs_vfs_atomic_open_dotl,
974 .lookup = v9fs_vfs_lookup,
975 .link = v9fs_vfs_link_dotl,
976 .symlink = v9fs_vfs_symlink_dotl,
977 .unlink = v9fs_vfs_unlink,
978 .mkdir = v9fs_vfs_mkdir_dotl,
979 .rmdir = v9fs_vfs_rmdir,
980 .mknod = v9fs_vfs_mknod_dotl,
981 .rename = v9fs_vfs_rename,
982 .getattr = v9fs_vfs_getattr_dotl,
983 .setattr = v9fs_vfs_setattr_dotl,
984 .listxattr = v9fs_listxattr,
985 .get_inode_acl = v9fs_iop_get_inode_acl,
986 .get_acl = v9fs_iop_get_acl,
987 .set_acl = v9fs_iop_set_acl,
988};
989
990const struct inode_operations v9fs_file_inode_operations_dotl = {
991 .getattr = v9fs_vfs_getattr_dotl,
992 .setattr = v9fs_vfs_setattr_dotl,
993 .listxattr = v9fs_listxattr,
994 .get_inode_acl = v9fs_iop_get_inode_acl,
995 .get_acl = v9fs_iop_get_acl,
996 .set_acl = v9fs_iop_set_acl,
997};
998
999const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1000 .get_link = v9fs_vfs_get_link_dotl,
1001 .getattr = v9fs_vfs_getattr_dotl,
1002 .setattr = v9fs_vfs_setattr_dotl,
1003 .listxattr = v9fs_listxattr,
1004};
1/*
2 * linux/fs/9p/vfs_inode_dotl.c
3 *
4 * This file contains vfs inode ops for the 9P2000.L 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
50static int
51v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
52 dev_t rdev);
53
54/**
55 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
56 * new file system object. This checks the S_ISGID to determine the owning
57 * group of the new file system object.
58 */
59
60static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
61{
62 BUG_ON(dir_inode == NULL);
63
64 if (dir_inode->i_mode & S_ISGID) {
65 /* set_gid bit is set.*/
66 return dir_inode->i_gid;
67 }
68 return current_fsgid();
69}
70
71static int v9fs_test_inode_dotl(struct inode *inode, void *data)
72{
73 struct v9fs_inode *v9inode = V9FS_I(inode);
74 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
75
76 /* don't match inode of different type */
77 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
78 return 0;
79
80 if (inode->i_generation != st->st_gen)
81 return 0;
82
83 /* compare qid details */
84 if (memcmp(&v9inode->qid.version,
85 &st->qid.version, sizeof(v9inode->qid.version)))
86 return 0;
87
88 if (v9inode->qid.type != st->qid.type)
89 return 0;
90
91 if (v9inode->qid.path != st->qid.path)
92 return 0;
93 return 1;
94}
95
96/* Always get a new inode */
97static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
98{
99 return 0;
100}
101
102static int v9fs_set_inode_dotl(struct inode *inode, void *data)
103{
104 struct v9fs_inode *v9inode = V9FS_I(inode);
105 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
106
107 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
108 inode->i_generation = st->st_gen;
109 return 0;
110}
111
112static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
113 struct p9_qid *qid,
114 struct p9_fid *fid,
115 struct p9_stat_dotl *st,
116 int new)
117{
118 int retval;
119 unsigned long i_ino;
120 struct inode *inode;
121 struct v9fs_session_info *v9ses = sb->s_fs_info;
122 int (*test)(struct inode *, void *);
123
124 if (new)
125 test = v9fs_test_new_inode_dotl;
126 else
127 test = v9fs_test_inode_dotl;
128
129 i_ino = v9fs_qid2ino(qid);
130 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
131 if (!inode)
132 return ERR_PTR(-ENOMEM);
133 if (!(inode->i_state & I_NEW))
134 return inode;
135 /*
136 * initialize the inode with the stat info
137 * FIXME!! we may need support for stale inodes
138 * later.
139 */
140 inode->i_ino = i_ino;
141 retval = v9fs_init_inode(v9ses, inode,
142 st->st_mode, new_decode_dev(st->st_rdev));
143 if (retval)
144 goto error;
145
146 v9fs_stat2inode_dotl(st, inode);
147 v9fs_cache_inode_get_cookie(inode);
148 retval = v9fs_get_acl(inode, fid);
149 if (retval)
150 goto error;
151
152 unlock_new_inode(inode);
153 return inode;
154error:
155 iget_failed(inode);
156 return ERR_PTR(retval);
157
158}
159
160struct inode *
161v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
162 struct super_block *sb, int new)
163{
164 struct p9_stat_dotl *st;
165 struct inode *inode = NULL;
166
167 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
168 if (IS_ERR(st))
169 return ERR_CAST(st);
170
171 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
172 kfree(st);
173 return inode;
174}
175
176struct dotl_openflag_map {
177 int open_flag;
178 int dotl_flag;
179};
180
181static int v9fs_mapped_dotl_flags(int flags)
182{
183 int i;
184 int rflags = 0;
185 struct dotl_openflag_map dotl_oflag_map[] = {
186 { O_CREAT, P9_DOTL_CREATE },
187 { O_EXCL, P9_DOTL_EXCL },
188 { O_NOCTTY, P9_DOTL_NOCTTY },
189 { O_APPEND, P9_DOTL_APPEND },
190 { O_NONBLOCK, P9_DOTL_NONBLOCK },
191 { O_DSYNC, P9_DOTL_DSYNC },
192 { FASYNC, P9_DOTL_FASYNC },
193 { O_DIRECT, P9_DOTL_DIRECT },
194 { O_LARGEFILE, P9_DOTL_LARGEFILE },
195 { O_DIRECTORY, P9_DOTL_DIRECTORY },
196 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
197 { O_NOATIME, P9_DOTL_NOATIME },
198 { O_CLOEXEC, P9_DOTL_CLOEXEC },
199 { O_SYNC, P9_DOTL_SYNC},
200 };
201 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
202 if (flags & dotl_oflag_map[i].open_flag)
203 rflags |= dotl_oflag_map[i].dotl_flag;
204 }
205 return rflags;
206}
207
208/**
209 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
210 * plan 9 open flag.
211 * @flags: flags to convert
212 */
213int v9fs_open_to_dotl_flags(int flags)
214{
215 int rflags = 0;
216
217 /*
218 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
219 * and P9_DOTL_NOACCESS
220 */
221 rflags |= flags & O_ACCMODE;
222 rflags |= v9fs_mapped_dotl_flags(flags);
223
224 return rflags;
225}
226
227/**
228 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
229 * @dir: directory inode that is being created
230 * @dentry: dentry that is being deleted
231 * @omode: create permissions
232 *
233 */
234
235static int
236v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
237 bool excl)
238{
239 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
240}
241
242static int
243v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
244 struct file *file, unsigned flags, umode_t omode,
245 int *opened)
246{
247 int err = 0;
248 kgid_t gid;
249 umode_t mode;
250 const unsigned char *name = NULL;
251 struct p9_qid qid;
252 struct inode *inode;
253 struct p9_fid *fid = NULL;
254 struct v9fs_inode *v9inode;
255 struct p9_fid *dfid, *ofid, *inode_fid;
256 struct v9fs_session_info *v9ses;
257 struct posix_acl *pacl = NULL, *dacl = NULL;
258 struct dentry *res = NULL;
259
260 if (d_in_lookup(dentry)) {
261 res = v9fs_vfs_lookup(dir, dentry, 0);
262 if (IS_ERR(res))
263 return PTR_ERR(res);
264
265 if (res)
266 dentry = res;
267 }
268
269 /* Only creates */
270 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
271 return finish_no_open(file, res);
272
273 v9ses = v9fs_inode2v9ses(dir);
274
275 name = dentry->d_name.name;
276 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
277 name, flags, omode);
278
279 dfid = v9fs_parent_fid(dentry);
280 if (IS_ERR(dfid)) {
281 err = PTR_ERR(dfid);
282 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
283 goto out;
284 }
285
286 /* clone a fid to use for creation */
287 ofid = clone_fid(dfid);
288 if (IS_ERR(ofid)) {
289 err = PTR_ERR(ofid);
290 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
291 goto out;
292 }
293
294 gid = v9fs_get_fsgid_for_create(dir);
295
296 mode = omode;
297 /* Update mode based on ACL value */
298 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
299 if (err) {
300 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
301 err);
302 goto error;
303 }
304 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
305 mode, gid, &qid);
306 if (err < 0) {
307 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
308 err);
309 goto error;
310 }
311 v9fs_invalidate_inode_attr(dir);
312
313 /* instantiate inode and assign the unopened fid to the dentry */
314 fid = p9_client_walk(dfid, 1, &name, 1);
315 if (IS_ERR(fid)) {
316 err = PTR_ERR(fid);
317 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
318 fid = NULL;
319 goto error;
320 }
321 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
322 if (IS_ERR(inode)) {
323 err = PTR_ERR(inode);
324 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
325 goto error;
326 }
327 /* Now set the ACL based on the default value */
328 v9fs_set_create_acl(inode, fid, dacl, pacl);
329
330 v9fs_fid_add(dentry, fid);
331 d_instantiate(dentry, inode);
332
333 v9inode = V9FS_I(inode);
334 mutex_lock(&v9inode->v_mutex);
335 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
336 !v9inode->writeback_fid &&
337 ((flags & O_ACCMODE) != O_RDONLY)) {
338 /*
339 * clone a fid and add it to writeback_fid
340 * we do it during open time instead of
341 * page dirty time via write_begin/page_mkwrite
342 * because we want write after unlink usecase
343 * to work.
344 */
345 inode_fid = v9fs_writeback_fid(dentry);
346 if (IS_ERR(inode_fid)) {
347 err = PTR_ERR(inode_fid);
348 mutex_unlock(&v9inode->v_mutex);
349 goto err_clunk_old_fid;
350 }
351 v9inode->writeback_fid = (void *) inode_fid;
352 }
353 mutex_unlock(&v9inode->v_mutex);
354 /* Since we are opening a file, assign the open fid to the file */
355 err = finish_open(file, dentry, generic_file_open, opened);
356 if (err)
357 goto err_clunk_old_fid;
358 file->private_data = ofid;
359 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
360 v9fs_cache_inode_set_cookie(inode, file);
361 *opened |= FILE_CREATED;
362out:
363 v9fs_put_acl(dacl, pacl);
364 dput(res);
365 return err;
366
367error:
368 if (fid)
369 p9_client_clunk(fid);
370err_clunk_old_fid:
371 if (ofid)
372 p9_client_clunk(ofid);
373 goto out;
374}
375
376/**
377 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
378 * @dir: inode that is being unlinked
379 * @dentry: dentry that is being unlinked
380 * @omode: mode for new directory
381 *
382 */
383
384static int v9fs_vfs_mkdir_dotl(struct inode *dir,
385 struct dentry *dentry, umode_t omode)
386{
387 int err;
388 struct v9fs_session_info *v9ses;
389 struct p9_fid *fid = NULL, *dfid = NULL;
390 kgid_t gid;
391 const unsigned char *name;
392 umode_t mode;
393 struct inode *inode;
394 struct p9_qid qid;
395 struct posix_acl *dacl = NULL, *pacl = NULL;
396
397 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
398 err = 0;
399 v9ses = v9fs_inode2v9ses(dir);
400
401 omode |= S_IFDIR;
402 if (dir->i_mode & S_ISGID)
403 omode |= S_ISGID;
404
405 dfid = v9fs_parent_fid(dentry);
406 if (IS_ERR(dfid)) {
407 err = PTR_ERR(dfid);
408 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
409 dfid = NULL;
410 goto error;
411 }
412
413 gid = v9fs_get_fsgid_for_create(dir);
414 mode = omode;
415 /* Update mode based on ACL value */
416 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
417 if (err) {
418 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
419 err);
420 goto error;
421 }
422 name = dentry->d_name.name;
423 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
424 if (err < 0)
425 goto error;
426
427 fid = p9_client_walk(dfid, 1, &name, 1);
428 if (IS_ERR(fid)) {
429 err = PTR_ERR(fid);
430 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
431 err);
432 fid = NULL;
433 goto error;
434 }
435
436 /* instantiate inode and assign the unopened fid to the dentry */
437 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
438 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
439 if (IS_ERR(inode)) {
440 err = PTR_ERR(inode);
441 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
442 err);
443 goto error;
444 }
445 v9fs_fid_add(dentry, fid);
446 v9fs_set_create_acl(inode, fid, dacl, pacl);
447 d_instantiate(dentry, inode);
448 fid = NULL;
449 err = 0;
450 } else {
451 /*
452 * Not in cached mode. No need to populate
453 * inode with stat. We need to get an inode
454 * so that we can set the acl with dentry
455 */
456 inode = v9fs_get_inode(dir->i_sb, mode, 0);
457 if (IS_ERR(inode)) {
458 err = PTR_ERR(inode);
459 goto error;
460 }
461 v9fs_set_create_acl(inode, fid, dacl, pacl);
462 d_instantiate(dentry, inode);
463 }
464 inc_nlink(dir);
465 v9fs_invalidate_inode_attr(dir);
466error:
467 if (fid)
468 p9_client_clunk(fid);
469 v9fs_put_acl(dacl, pacl);
470 return err;
471}
472
473static int
474v9fs_vfs_getattr_dotl(const struct path *path, struct kstat *stat,
475 u32 request_mask, unsigned int flags)
476{
477 struct dentry *dentry = path->dentry;
478 struct v9fs_session_info *v9ses;
479 struct p9_fid *fid;
480 struct p9_stat_dotl *st;
481
482 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
483 v9ses = v9fs_dentry2v9ses(dentry);
484 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
485 generic_fillattr(d_inode(dentry), stat);
486 return 0;
487 }
488 fid = v9fs_fid_lookup(dentry);
489 if (IS_ERR(fid))
490 return PTR_ERR(fid);
491
492 /* Ask for all the fields in stat structure. Server will return
493 * whatever it supports
494 */
495
496 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
497 if (IS_ERR(st))
498 return PTR_ERR(st);
499
500 v9fs_stat2inode_dotl(st, d_inode(dentry));
501 generic_fillattr(d_inode(dentry), stat);
502 /* Change block size to what the server returned */
503 stat->blksize = st->st_blksize;
504
505 kfree(st);
506 return 0;
507}
508
509/*
510 * Attribute flags.
511 */
512#define P9_ATTR_MODE (1 << 0)
513#define P9_ATTR_UID (1 << 1)
514#define P9_ATTR_GID (1 << 2)
515#define P9_ATTR_SIZE (1 << 3)
516#define P9_ATTR_ATIME (1 << 4)
517#define P9_ATTR_MTIME (1 << 5)
518#define P9_ATTR_CTIME (1 << 6)
519#define P9_ATTR_ATIME_SET (1 << 7)
520#define P9_ATTR_MTIME_SET (1 << 8)
521
522struct dotl_iattr_map {
523 int iattr_valid;
524 int p9_iattr_valid;
525};
526
527static int v9fs_mapped_iattr_valid(int iattr_valid)
528{
529 int i;
530 int p9_iattr_valid = 0;
531 struct dotl_iattr_map dotl_iattr_map[] = {
532 { ATTR_MODE, P9_ATTR_MODE },
533 { ATTR_UID, P9_ATTR_UID },
534 { ATTR_GID, P9_ATTR_GID },
535 { ATTR_SIZE, P9_ATTR_SIZE },
536 { ATTR_ATIME, P9_ATTR_ATIME },
537 { ATTR_MTIME, P9_ATTR_MTIME },
538 { ATTR_CTIME, P9_ATTR_CTIME },
539 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
540 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
541 };
542 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
543 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
544 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
545 }
546 return p9_iattr_valid;
547}
548
549/**
550 * v9fs_vfs_setattr_dotl - set file metadata
551 * @dentry: file whose metadata to set
552 * @iattr: metadata assignment structure
553 *
554 */
555
556int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
557{
558 int retval;
559 struct p9_fid *fid;
560 struct p9_iattr_dotl p9attr;
561 struct inode *inode = d_inode(dentry);
562
563 p9_debug(P9_DEBUG_VFS, "\n");
564
565 retval = setattr_prepare(dentry, iattr);
566 if (retval)
567 return retval;
568
569 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
570 p9attr.mode = iattr->ia_mode;
571 p9attr.uid = iattr->ia_uid;
572 p9attr.gid = iattr->ia_gid;
573 p9attr.size = iattr->ia_size;
574 p9attr.atime_sec = iattr->ia_atime.tv_sec;
575 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
576 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
577 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
578
579 fid = v9fs_fid_lookup(dentry);
580 if (IS_ERR(fid))
581 return PTR_ERR(fid);
582
583 /* Write all dirty data */
584 if (S_ISREG(inode->i_mode))
585 filemap_write_and_wait(inode->i_mapping);
586
587 retval = p9_client_setattr(fid, &p9attr);
588 if (retval < 0)
589 return retval;
590
591 if ((iattr->ia_valid & ATTR_SIZE) &&
592 iattr->ia_size != i_size_read(inode))
593 truncate_setsize(inode, iattr->ia_size);
594
595 v9fs_invalidate_inode_attr(inode);
596 setattr_copy(inode, iattr);
597 mark_inode_dirty(inode);
598 if (iattr->ia_valid & ATTR_MODE) {
599 /* We also want to update ACL when we update mode bits */
600 retval = v9fs_acl_chmod(inode, fid);
601 if (retval < 0)
602 return retval;
603 }
604 return 0;
605}
606
607/**
608 * v9fs_stat2inode_dotl - populate an inode structure with stat info
609 * @stat: stat structure
610 * @inode: inode to populate
611 *
612 */
613
614void
615v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
616{
617 umode_t mode;
618 struct v9fs_inode *v9inode = V9FS_I(inode);
619
620 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
621 inode->i_atime.tv_sec = stat->st_atime_sec;
622 inode->i_atime.tv_nsec = stat->st_atime_nsec;
623 inode->i_mtime.tv_sec = stat->st_mtime_sec;
624 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
625 inode->i_ctime.tv_sec = stat->st_ctime_sec;
626 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
627 inode->i_uid = stat->st_uid;
628 inode->i_gid = stat->st_gid;
629 set_nlink(inode, stat->st_nlink);
630
631 mode = stat->st_mode & S_IALLUGO;
632 mode |= inode->i_mode & ~S_IALLUGO;
633 inode->i_mode = mode;
634
635 i_size_write(inode, stat->st_size);
636 inode->i_blocks = stat->st_blocks;
637 } else {
638 if (stat->st_result_mask & P9_STATS_ATIME) {
639 inode->i_atime.tv_sec = stat->st_atime_sec;
640 inode->i_atime.tv_nsec = stat->st_atime_nsec;
641 }
642 if (stat->st_result_mask & P9_STATS_MTIME) {
643 inode->i_mtime.tv_sec = stat->st_mtime_sec;
644 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
645 }
646 if (stat->st_result_mask & P9_STATS_CTIME) {
647 inode->i_ctime.tv_sec = stat->st_ctime_sec;
648 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
649 }
650 if (stat->st_result_mask & P9_STATS_UID)
651 inode->i_uid = stat->st_uid;
652 if (stat->st_result_mask & P9_STATS_GID)
653 inode->i_gid = stat->st_gid;
654 if (stat->st_result_mask & P9_STATS_NLINK)
655 set_nlink(inode, stat->st_nlink);
656 if (stat->st_result_mask & P9_STATS_MODE) {
657 inode->i_mode = stat->st_mode;
658 if ((S_ISBLK(inode->i_mode)) ||
659 (S_ISCHR(inode->i_mode)))
660 init_special_inode(inode, inode->i_mode,
661 inode->i_rdev);
662 }
663 if (stat->st_result_mask & P9_STATS_RDEV)
664 inode->i_rdev = new_decode_dev(stat->st_rdev);
665 if (stat->st_result_mask & P9_STATS_SIZE)
666 i_size_write(inode, stat->st_size);
667 if (stat->st_result_mask & P9_STATS_BLOCKS)
668 inode->i_blocks = stat->st_blocks;
669 }
670 if (stat->st_result_mask & P9_STATS_GEN)
671 inode->i_generation = stat->st_gen;
672
673 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
674 * because the inode structure does not have fields for them.
675 */
676 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
677}
678
679static int
680v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
681 const char *symname)
682{
683 int err;
684 kgid_t gid;
685 const unsigned char *name;
686 struct p9_qid qid;
687 struct inode *inode;
688 struct p9_fid *dfid;
689 struct p9_fid *fid = NULL;
690 struct v9fs_session_info *v9ses;
691
692 name = dentry->d_name.name;
693 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
694 v9ses = v9fs_inode2v9ses(dir);
695
696 dfid = v9fs_parent_fid(dentry);
697 if (IS_ERR(dfid)) {
698 err = PTR_ERR(dfid);
699 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
700 return err;
701 }
702
703 gid = v9fs_get_fsgid_for_create(dir);
704
705 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
706 err = p9_client_symlink(dfid, name, symname, gid, &qid);
707
708 if (err < 0) {
709 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
710 goto error;
711 }
712
713 v9fs_invalidate_inode_attr(dir);
714 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
715 /* Now walk from the parent so we can get an unopened fid. */
716 fid = p9_client_walk(dfid, 1, &name, 1);
717 if (IS_ERR(fid)) {
718 err = PTR_ERR(fid);
719 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
720 err);
721 fid = NULL;
722 goto error;
723 }
724
725 /* instantiate inode and assign the unopened fid to dentry */
726 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
727 if (IS_ERR(inode)) {
728 err = PTR_ERR(inode);
729 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
730 err);
731 goto error;
732 }
733 v9fs_fid_add(dentry, fid);
734 d_instantiate(dentry, inode);
735 fid = NULL;
736 err = 0;
737 } else {
738 /* Not in cached mode. No need to populate inode with stat */
739 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
740 if (IS_ERR(inode)) {
741 err = PTR_ERR(inode);
742 goto error;
743 }
744 d_instantiate(dentry, inode);
745 }
746
747error:
748 if (fid)
749 p9_client_clunk(fid);
750
751 return err;
752}
753
754/**
755 * v9fs_vfs_link_dotl - create a hardlink for dotl
756 * @old_dentry: dentry for file to link to
757 * @dir: inode destination for new link
758 * @dentry: dentry for link
759 *
760 */
761
762static int
763v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
764 struct dentry *dentry)
765{
766 int err;
767 struct p9_fid *dfid, *oldfid;
768 struct v9fs_session_info *v9ses;
769
770 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
771 dir->i_ino, old_dentry, dentry);
772
773 v9ses = v9fs_inode2v9ses(dir);
774 dfid = v9fs_parent_fid(dentry);
775 if (IS_ERR(dfid))
776 return PTR_ERR(dfid);
777
778 oldfid = v9fs_fid_lookup(old_dentry);
779 if (IS_ERR(oldfid))
780 return PTR_ERR(oldfid);
781
782 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
783
784 if (err < 0) {
785 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
786 return err;
787 }
788
789 v9fs_invalidate_inode_attr(dir);
790 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
791 /* Get the latest stat info from server. */
792 struct p9_fid *fid;
793 fid = v9fs_fid_lookup(old_dentry);
794 if (IS_ERR(fid))
795 return PTR_ERR(fid);
796
797 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
798 }
799 ihold(d_inode(old_dentry));
800 d_instantiate(dentry, d_inode(old_dentry));
801
802 return err;
803}
804
805/**
806 * v9fs_vfs_mknod_dotl - create a special file
807 * @dir: inode destination for new link
808 * @dentry: dentry for file
809 * @omode: mode for creation
810 * @rdev: device associated with special file
811 *
812 */
813static int
814v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
815 dev_t rdev)
816{
817 int err;
818 kgid_t gid;
819 const unsigned char *name;
820 umode_t mode;
821 struct v9fs_session_info *v9ses;
822 struct p9_fid *fid = NULL, *dfid = NULL;
823 struct inode *inode;
824 struct p9_qid qid;
825 struct posix_acl *dacl = NULL, *pacl = NULL;
826
827 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
828 dir->i_ino, dentry, omode,
829 MAJOR(rdev), MINOR(rdev));
830
831 v9ses = v9fs_inode2v9ses(dir);
832 dfid = v9fs_parent_fid(dentry);
833 if (IS_ERR(dfid)) {
834 err = PTR_ERR(dfid);
835 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
836 dfid = NULL;
837 goto error;
838 }
839
840 gid = v9fs_get_fsgid_for_create(dir);
841 mode = omode;
842 /* Update mode based on ACL value */
843 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
844 if (err) {
845 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
846 err);
847 goto error;
848 }
849 name = dentry->d_name.name;
850
851 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
852 if (err < 0)
853 goto error;
854
855 v9fs_invalidate_inode_attr(dir);
856 fid = p9_client_walk(dfid, 1, &name, 1);
857 if (IS_ERR(fid)) {
858 err = PTR_ERR(fid);
859 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
860 err);
861 fid = NULL;
862 goto error;
863 }
864
865 /* instantiate inode and assign the unopened fid to the dentry */
866 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
867 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
868 if (IS_ERR(inode)) {
869 err = PTR_ERR(inode);
870 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
871 err);
872 goto error;
873 }
874 v9fs_set_create_acl(inode, fid, dacl, pacl);
875 v9fs_fid_add(dentry, fid);
876 d_instantiate(dentry, inode);
877 fid = NULL;
878 err = 0;
879 } else {
880 /*
881 * Not in cached mode. No need to populate inode with stat.
882 * socket syscall returns a fd, so we need instantiate
883 */
884 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
885 if (IS_ERR(inode)) {
886 err = PTR_ERR(inode);
887 goto error;
888 }
889 v9fs_set_create_acl(inode, fid, dacl, pacl);
890 d_instantiate(dentry, inode);
891 }
892error:
893 if (fid)
894 p9_client_clunk(fid);
895 v9fs_put_acl(dacl, pacl);
896 return err;
897}
898
899/**
900 * v9fs_vfs_get_link_dotl - follow a symlink path
901 * @dentry: dentry for symlink
902 * @inode: inode for symlink
903 * @done: destructor for return value
904 */
905
906static const char *
907v9fs_vfs_get_link_dotl(struct dentry *dentry,
908 struct inode *inode,
909 struct delayed_call *done)
910{
911 struct p9_fid *fid;
912 char *target;
913 int retval;
914
915 if (!dentry)
916 return ERR_PTR(-ECHILD);
917
918 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
919
920 fid = v9fs_fid_lookup(dentry);
921 if (IS_ERR(fid))
922 return ERR_CAST(fid);
923 retval = p9_client_readlink(fid, &target);
924 if (retval)
925 return ERR_PTR(retval);
926 set_delayed_call(done, kfree_link, target);
927 return target;
928}
929
930int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
931{
932 loff_t i_size;
933 struct p9_stat_dotl *st;
934 struct v9fs_session_info *v9ses;
935
936 v9ses = v9fs_inode2v9ses(inode);
937 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
938 if (IS_ERR(st))
939 return PTR_ERR(st);
940 /*
941 * Don't update inode if the file type is different
942 */
943 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
944 goto out;
945
946 spin_lock(&inode->i_lock);
947 /*
948 * We don't want to refresh inode->i_size,
949 * because we may have cached data
950 */
951 i_size = inode->i_size;
952 v9fs_stat2inode_dotl(st, inode);
953 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
954 inode->i_size = i_size;
955 spin_unlock(&inode->i_lock);
956out:
957 kfree(st);
958 return 0;
959}
960
961const struct inode_operations v9fs_dir_inode_operations_dotl = {
962 .create = v9fs_vfs_create_dotl,
963 .atomic_open = v9fs_vfs_atomic_open_dotl,
964 .lookup = v9fs_vfs_lookup,
965 .link = v9fs_vfs_link_dotl,
966 .symlink = v9fs_vfs_symlink_dotl,
967 .unlink = v9fs_vfs_unlink,
968 .mkdir = v9fs_vfs_mkdir_dotl,
969 .rmdir = v9fs_vfs_rmdir,
970 .mknod = v9fs_vfs_mknod_dotl,
971 .rename = v9fs_vfs_rename,
972 .getattr = v9fs_vfs_getattr_dotl,
973 .setattr = v9fs_vfs_setattr_dotl,
974 .listxattr = v9fs_listxattr,
975 .get_acl = v9fs_iop_get_acl,
976};
977
978const struct inode_operations v9fs_file_inode_operations_dotl = {
979 .getattr = v9fs_vfs_getattr_dotl,
980 .setattr = v9fs_vfs_setattr_dotl,
981 .listxattr = v9fs_listxattr,
982 .get_acl = v9fs_iop_get_acl,
983};
984
985const struct inode_operations v9fs_symlink_inode_operations_dotl = {
986 .get_link = v9fs_vfs_get_link_dotl,
987 .getattr = v9fs_vfs_getattr_dotl,
988 .setattr = v9fs_vfs_setattr_dotl,
989 .listxattr = v9fs_listxattr,
990};