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