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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, int 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 gid_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
71/**
72 * v9fs_dentry_from_dir_inode - helper function to get the dentry from
73 * dir inode.
74 *
75 */
76
77static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
78{
79 struct dentry *dentry;
80
81 spin_lock(&inode->i_lock);
82 /* Directory should have only one entry. */
83 BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
84 dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
85 spin_unlock(&inode->i_lock);
86 return dentry;
87}
88
89static int v9fs_test_inode_dotl(struct inode *inode, void *data)
90{
91 struct v9fs_inode *v9inode = V9FS_I(inode);
92 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
93
94 /* don't match inode of different type */
95 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
96 return 0;
97
98 if (inode->i_generation != st->st_gen)
99 return 0;
100
101 /* compare qid details */
102 if (memcmp(&v9inode->qid.version,
103 &st->qid.version, sizeof(v9inode->qid.version)))
104 return 0;
105
106 if (v9inode->qid.type != st->qid.type)
107 return 0;
108 return 1;
109}
110
111/* Always get a new inode */
112static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
113{
114 return 0;
115}
116
117static int v9fs_set_inode_dotl(struct inode *inode, void *data)
118{
119 struct v9fs_inode *v9inode = V9FS_I(inode);
120 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
121
122 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
123 inode->i_generation = st->st_gen;
124 return 0;
125}
126
127static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
128 struct p9_qid *qid,
129 struct p9_fid *fid,
130 struct p9_stat_dotl *st,
131 int new)
132{
133 int retval;
134 unsigned long i_ino;
135 struct inode *inode;
136 struct v9fs_session_info *v9ses = sb->s_fs_info;
137 int (*test)(struct inode *, void *);
138
139 if (new)
140 test = v9fs_test_new_inode_dotl;
141 else
142 test = v9fs_test_inode_dotl;
143
144 i_ino = v9fs_qid2ino(qid);
145 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
146 if (!inode)
147 return ERR_PTR(-ENOMEM);
148 if (!(inode->i_state & I_NEW))
149 return inode;
150 /*
151 * initialize the inode with the stat info
152 * FIXME!! we may need support for stale inodes
153 * later.
154 */
155 inode->i_ino = i_ino;
156 retval = v9fs_init_inode(v9ses, inode,
157 st->st_mode, new_decode_dev(st->st_rdev));
158 if (retval)
159 goto error;
160
161 v9fs_stat2inode_dotl(st, inode);
162#ifdef CONFIG_9P_FSCACHE
163 v9fs_cache_inode_get_cookie(inode);
164#endif
165 retval = v9fs_get_acl(inode, fid);
166 if (retval)
167 goto error;
168
169 unlock_new_inode(inode);
170 return inode;
171error:
172 unlock_new_inode(inode);
173 iput(inode);
174 return ERR_PTR(retval);
175
176}
177
178struct inode *
179v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
180 struct super_block *sb, int new)
181{
182 struct p9_stat_dotl *st;
183 struct inode *inode = NULL;
184
185 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
186 if (IS_ERR(st))
187 return ERR_CAST(st);
188
189 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
190 kfree(st);
191 return inode;
192}
193
194struct dotl_openflag_map {
195 int open_flag;
196 int dotl_flag;
197};
198
199static int v9fs_mapped_dotl_flags(int flags)
200{
201 int i;
202 int rflags = 0;
203 struct dotl_openflag_map dotl_oflag_map[] = {
204 { O_CREAT, P9_DOTL_CREATE },
205 { O_EXCL, P9_DOTL_EXCL },
206 { O_NOCTTY, P9_DOTL_NOCTTY },
207 { O_TRUNC, P9_DOTL_TRUNC },
208 { O_APPEND, P9_DOTL_APPEND },
209 { O_NONBLOCK, P9_DOTL_NONBLOCK },
210 { O_DSYNC, P9_DOTL_DSYNC },
211 { FASYNC, P9_DOTL_FASYNC },
212 { O_DIRECT, P9_DOTL_DIRECT },
213 { O_LARGEFILE, P9_DOTL_LARGEFILE },
214 { O_DIRECTORY, P9_DOTL_DIRECTORY },
215 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
216 { O_NOATIME, P9_DOTL_NOATIME },
217 { O_CLOEXEC, P9_DOTL_CLOEXEC },
218 { O_SYNC, P9_DOTL_SYNC},
219 };
220 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
221 if (flags & dotl_oflag_map[i].open_flag)
222 rflags |= dotl_oflag_map[i].dotl_flag;
223 }
224 return rflags;
225}
226
227/**
228 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
229 * plan 9 open flag.
230 * @flags: flags to convert
231 */
232int v9fs_open_to_dotl_flags(int flags)
233{
234 int rflags = 0;
235
236 /*
237 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
238 * and P9_DOTL_NOACCESS
239 */
240 rflags |= flags & O_ACCMODE;
241 rflags |= v9fs_mapped_dotl_flags(flags);
242
243 return rflags;
244}
245
246/**
247 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
248 * @dir: directory inode that is being created
249 * @dentry: dentry that is being deleted
250 * @mode: create permissions
251 * @nd: path information
252 *
253 */
254
255static int
256v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
257 struct nameidata *nd)
258{
259 int err = 0;
260 gid_t gid;
261 int flags;
262 umode_t mode;
263 char *name = NULL;
264 struct file *filp;
265 struct p9_qid qid;
266 struct inode *inode;
267 struct p9_fid *fid = NULL;
268 struct v9fs_inode *v9inode;
269 struct p9_fid *dfid, *ofid, *inode_fid;
270 struct v9fs_session_info *v9ses;
271 struct posix_acl *pacl = NULL, *dacl = NULL;
272
273 v9ses = v9fs_inode2v9ses(dir);
274 if (nd)
275 flags = nd->intent.open.flags;
276 else {
277 /*
278 * create call without LOOKUP_OPEN is due
279 * to mknod of regular files. So use mknod
280 * operation.
281 */
282 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
283 }
284
285 name = (char *) dentry->d_name.name;
286 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
287 "mode:0x%x\n", name, flags, omode);
288
289 dfid = v9fs_fid_lookup(dentry->d_parent);
290 if (IS_ERR(dfid)) {
291 err = PTR_ERR(dfid);
292 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
293 return err;
294 }
295
296 /* clone a fid to use for creation */
297 ofid = p9_client_walk(dfid, 0, NULL, 1);
298 if (IS_ERR(ofid)) {
299 err = PTR_ERR(ofid);
300 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
301 return err;
302 }
303
304 gid = v9fs_get_fsgid_for_create(dir);
305
306 mode = omode;
307 /* Update mode based on ACL value */
308 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
309 if (err) {
310 P9_DPRINTK(P9_DEBUG_VFS,
311 "Failed to get acl values in creat %d\n", err);
312 goto error;
313 }
314 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
315 mode, gid, &qid);
316 if (err < 0) {
317 P9_DPRINTK(P9_DEBUG_VFS,
318 "p9_client_open_dotl failed in creat %d\n",
319 err);
320 goto error;
321 }
322 v9fs_invalidate_inode_attr(dir);
323
324 /* instantiate inode and assign the unopened fid to the dentry */
325 fid = p9_client_walk(dfid, 1, &name, 1);
326 if (IS_ERR(fid)) {
327 err = PTR_ERR(fid);
328 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
329 fid = NULL;
330 goto error;
331 }
332 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
333 if (IS_ERR(inode)) {
334 err = PTR_ERR(inode);
335 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
336 goto error;
337 }
338 err = v9fs_fid_add(dentry, fid);
339 if (err < 0)
340 goto error;
341 d_instantiate(dentry, inode);
342
343 /* Now set the ACL based on the default value */
344 v9fs_set_create_acl(dentry, &dacl, &pacl);
345
346 v9inode = V9FS_I(inode);
347 mutex_lock(&v9inode->v_mutex);
348 if (v9ses->cache && !v9inode->writeback_fid &&
349 ((flags & O_ACCMODE) != O_RDONLY)) {
350 /*
351 * clone a fid and add it to writeback_fid
352 * we do it during open time instead of
353 * page dirty time via write_begin/page_mkwrite
354 * because we want write after unlink usecase
355 * to work.
356 */
357 inode_fid = v9fs_writeback_fid(dentry);
358 if (IS_ERR(inode_fid)) {
359 err = PTR_ERR(inode_fid);
360 mutex_unlock(&v9inode->v_mutex);
361 goto err_clunk_old_fid;
362 }
363 v9inode->writeback_fid = (void *) inode_fid;
364 }
365 mutex_unlock(&v9inode->v_mutex);
366 /* Since we are opening a file, assign the open fid to the file */
367 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
368 if (IS_ERR(filp)) {
369 err = PTR_ERR(filp);
370 goto err_clunk_old_fid;
371 }
372 filp->private_data = ofid;
373#ifdef CONFIG_9P_FSCACHE
374 if (v9ses->cache)
375 v9fs_cache_inode_set_cookie(inode, filp);
376#endif
377 return 0;
378
379error:
380 if (fid)
381 p9_client_clunk(fid);
382err_clunk_old_fid:
383 if (ofid)
384 p9_client_clunk(ofid);
385 v9fs_set_create_acl(NULL, &dacl, &pacl);
386 return err;
387}
388
389/**
390 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
391 * @dir: inode that is being unlinked
392 * @dentry: dentry that is being unlinked
393 * @mode: mode for new directory
394 *
395 */
396
397static int v9fs_vfs_mkdir_dotl(struct inode *dir,
398 struct dentry *dentry, int omode)
399{
400 int err;
401 struct v9fs_session_info *v9ses;
402 struct p9_fid *fid = NULL, *dfid = NULL;
403 gid_t gid;
404 char *name;
405 umode_t mode;
406 struct inode *inode;
407 struct p9_qid qid;
408 struct dentry *dir_dentry;
409 struct posix_acl *dacl = NULL, *pacl = NULL;
410
411 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
412 err = 0;
413 v9ses = v9fs_inode2v9ses(dir);
414
415 omode |= S_IFDIR;
416 if (dir->i_mode & S_ISGID)
417 omode |= S_ISGID;
418
419 dir_dentry = v9fs_dentry_from_dir_inode(dir);
420 dfid = v9fs_fid_lookup(dir_dentry);
421 if (IS_ERR(dfid)) {
422 err = PTR_ERR(dfid);
423 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
424 dfid = NULL;
425 goto error;
426 }
427
428 gid = v9fs_get_fsgid_for_create(dir);
429 mode = omode;
430 /* Update mode based on ACL value */
431 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
432 if (err) {
433 P9_DPRINTK(P9_DEBUG_VFS,
434 "Failed to get acl values in mkdir %d\n", err);
435 goto error;
436 }
437 name = (char *) dentry->d_name.name;
438 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
439 if (err < 0)
440 goto error;
441
442 /* instantiate inode and assign the unopened fid to the dentry */
443 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
444 fid = p9_client_walk(dfid, 1, &name, 1);
445 if (IS_ERR(fid)) {
446 err = PTR_ERR(fid);
447 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
448 err);
449 fid = NULL;
450 goto error;
451 }
452
453 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
454 if (IS_ERR(inode)) {
455 err = PTR_ERR(inode);
456 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
457 err);
458 goto error;
459 }
460 err = v9fs_fid_add(dentry, fid);
461 if (err < 0)
462 goto error;
463 d_instantiate(dentry, inode);
464 fid = NULL;
465 } else {
466 /*
467 * Not in cached mode. No need to populate
468 * inode with stat. We need to get an inode
469 * so that we can set the acl with dentry
470 */
471 inode = v9fs_get_inode(dir->i_sb, mode, 0);
472 if (IS_ERR(inode)) {
473 err = PTR_ERR(inode);
474 goto error;
475 }
476 d_instantiate(dentry, inode);
477 }
478 /* Now set the ACL based on the default value */
479 v9fs_set_create_acl(dentry, &dacl, &pacl);
480 inc_nlink(dir);
481 v9fs_invalidate_inode_attr(dir);
482error:
483 if (fid)
484 p9_client_clunk(fid);
485 v9fs_set_create_acl(NULL, &dacl, &pacl);
486 return err;
487}
488
489static int
490v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
491 struct kstat *stat)
492{
493 int err;
494 struct v9fs_session_info *v9ses;
495 struct p9_fid *fid;
496 struct p9_stat_dotl *st;
497
498 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
499 err = -EPERM;
500 v9ses = v9fs_dentry2v9ses(dentry);
501 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
502 generic_fillattr(dentry->d_inode, stat);
503 return 0;
504 }
505 fid = v9fs_fid_lookup(dentry);
506 if (IS_ERR(fid))
507 return PTR_ERR(fid);
508
509 /* Ask for all the fields in stat structure. Server will return
510 * whatever it supports
511 */
512
513 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
514 if (IS_ERR(st))
515 return PTR_ERR(st);
516
517 v9fs_stat2inode_dotl(st, dentry->d_inode);
518 generic_fillattr(dentry->d_inode, stat);
519 /* Change block size to what the server returned */
520 stat->blksize = st->st_blksize;
521
522 kfree(st);
523 return 0;
524}
525
526/**
527 * v9fs_vfs_setattr_dotl - set file metadata
528 * @dentry: file whose metadata to set
529 * @iattr: metadata assignment structure
530 *
531 */
532
533int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
534{
535 int retval;
536 struct v9fs_session_info *v9ses;
537 struct p9_fid *fid;
538 struct p9_iattr_dotl p9attr;
539
540 P9_DPRINTK(P9_DEBUG_VFS, "\n");
541
542 retval = inode_change_ok(dentry->d_inode, iattr);
543 if (retval)
544 return retval;
545
546 p9attr.valid = iattr->ia_valid;
547 p9attr.mode = iattr->ia_mode;
548 p9attr.uid = iattr->ia_uid;
549 p9attr.gid = iattr->ia_gid;
550 p9attr.size = iattr->ia_size;
551 p9attr.atime_sec = iattr->ia_atime.tv_sec;
552 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
553 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
554 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
555
556 retval = -EPERM;
557 v9ses = v9fs_dentry2v9ses(dentry);
558 fid = v9fs_fid_lookup(dentry);
559 if (IS_ERR(fid))
560 return PTR_ERR(fid);
561
562 /* Write all dirty data */
563 if (S_ISREG(dentry->d_inode->i_mode))
564 filemap_write_and_wait(dentry->d_inode->i_mapping);
565
566 retval = p9_client_setattr(fid, &p9attr);
567 if (retval < 0)
568 return retval;
569
570 if ((iattr->ia_valid & ATTR_SIZE) &&
571 iattr->ia_size != i_size_read(dentry->d_inode))
572 truncate_setsize(dentry->d_inode, iattr->ia_size);
573
574 v9fs_invalidate_inode_attr(dentry->d_inode);
575 setattr_copy(dentry->d_inode, iattr);
576 mark_inode_dirty(dentry->d_inode);
577 if (iattr->ia_valid & ATTR_MODE) {
578 /* We also want to update ACL when we update mode bits */
579 retval = v9fs_acl_chmod(dentry);
580 if (retval < 0)
581 return retval;
582 }
583 return 0;
584}
585
586/**
587 * v9fs_stat2inode_dotl - populate an inode structure with stat info
588 * @stat: stat structure
589 * @inode: inode to populate
590 * @sb: superblock of filesystem
591 *
592 */
593
594void
595v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
596{
597 mode_t mode;
598 struct v9fs_inode *v9inode = V9FS_I(inode);
599
600 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
601 inode->i_atime.tv_sec = stat->st_atime_sec;
602 inode->i_atime.tv_nsec = stat->st_atime_nsec;
603 inode->i_mtime.tv_sec = stat->st_mtime_sec;
604 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
605 inode->i_ctime.tv_sec = stat->st_ctime_sec;
606 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
607 inode->i_uid = stat->st_uid;
608 inode->i_gid = stat->st_gid;
609 inode->i_nlink = stat->st_nlink;
610
611 mode = stat->st_mode & S_IALLUGO;
612 mode |= inode->i_mode & ~S_IALLUGO;
613 inode->i_mode = mode;
614
615 i_size_write(inode, stat->st_size);
616 inode->i_blocks = stat->st_blocks;
617 } else {
618 if (stat->st_result_mask & P9_STATS_ATIME) {
619 inode->i_atime.tv_sec = stat->st_atime_sec;
620 inode->i_atime.tv_nsec = stat->st_atime_nsec;
621 }
622 if (stat->st_result_mask & P9_STATS_MTIME) {
623 inode->i_mtime.tv_sec = stat->st_mtime_sec;
624 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
625 }
626 if (stat->st_result_mask & P9_STATS_CTIME) {
627 inode->i_ctime.tv_sec = stat->st_ctime_sec;
628 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
629 }
630 if (stat->st_result_mask & P9_STATS_UID)
631 inode->i_uid = stat->st_uid;
632 if (stat->st_result_mask & P9_STATS_GID)
633 inode->i_gid = stat->st_gid;
634 if (stat->st_result_mask & P9_STATS_NLINK)
635 inode->i_nlink = stat->st_nlink;
636 if (stat->st_result_mask & P9_STATS_MODE) {
637 inode->i_mode = stat->st_mode;
638 if ((S_ISBLK(inode->i_mode)) ||
639 (S_ISCHR(inode->i_mode)))
640 init_special_inode(inode, inode->i_mode,
641 inode->i_rdev);
642 }
643 if (stat->st_result_mask & P9_STATS_RDEV)
644 inode->i_rdev = new_decode_dev(stat->st_rdev);
645 if (stat->st_result_mask & P9_STATS_SIZE)
646 i_size_write(inode, stat->st_size);
647 if (stat->st_result_mask & P9_STATS_BLOCKS)
648 inode->i_blocks = stat->st_blocks;
649 }
650 if (stat->st_result_mask & P9_STATS_GEN)
651 inode->i_generation = stat->st_gen;
652
653 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
654 * because the inode structure does not have fields for them.
655 */
656 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
657}
658
659static int
660v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
661 const char *symname)
662{
663 int err;
664 gid_t gid;
665 char *name;
666 struct p9_qid qid;
667 struct inode *inode;
668 struct p9_fid *dfid;
669 struct p9_fid *fid = NULL;
670 struct v9fs_session_info *v9ses;
671
672 name = (char *) dentry->d_name.name;
673 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
674 dir->i_ino, name, symname);
675 v9ses = v9fs_inode2v9ses(dir);
676
677 dfid = v9fs_fid_lookup(dentry->d_parent);
678 if (IS_ERR(dfid)) {
679 err = PTR_ERR(dfid);
680 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
681 return err;
682 }
683
684 gid = v9fs_get_fsgid_for_create(dir);
685
686 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
687 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
688
689 if (err < 0) {
690 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
691 goto error;
692 }
693
694 v9fs_invalidate_inode_attr(dir);
695 if (v9ses->cache) {
696 /* Now walk from the parent so we can get an unopened fid. */
697 fid = p9_client_walk(dfid, 1, &name, 1);
698 if (IS_ERR(fid)) {
699 err = PTR_ERR(fid);
700 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
701 err);
702 fid = NULL;
703 goto error;
704 }
705
706 /* instantiate inode and assign the unopened fid to dentry */
707 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
708 if (IS_ERR(inode)) {
709 err = PTR_ERR(inode);
710 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
711 err);
712 goto error;
713 }
714 err = v9fs_fid_add(dentry, fid);
715 if (err < 0)
716 goto error;
717 d_instantiate(dentry, inode);
718 fid = NULL;
719 } else {
720 /* Not in cached mode. No need to populate inode with stat */
721 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
722 if (IS_ERR(inode)) {
723 err = PTR_ERR(inode);
724 goto error;
725 }
726 d_instantiate(dentry, inode);
727 }
728
729error:
730 if (fid)
731 p9_client_clunk(fid);
732
733 return err;
734}
735
736/**
737 * v9fs_vfs_link_dotl - create a hardlink for dotl
738 * @old_dentry: dentry for file to link to
739 * @dir: inode destination for new link
740 * @dentry: dentry for link
741 *
742 */
743
744static int
745v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
746 struct dentry *dentry)
747{
748 int err;
749 char *name;
750 struct dentry *dir_dentry;
751 struct p9_fid *dfid, *oldfid;
752 struct v9fs_session_info *v9ses;
753
754 P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
755 dir->i_ino, old_dentry->d_name.name,
756 dentry->d_name.name);
757
758 v9ses = v9fs_inode2v9ses(dir);
759 dir_dentry = v9fs_dentry_from_dir_inode(dir);
760 dfid = v9fs_fid_lookup(dir_dentry);
761 if (IS_ERR(dfid))
762 return PTR_ERR(dfid);
763
764 oldfid = v9fs_fid_lookup(old_dentry);
765 if (IS_ERR(oldfid))
766 return PTR_ERR(oldfid);
767
768 name = (char *) dentry->d_name.name;
769
770 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
771
772 if (err < 0) {
773 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
774 return err;
775 }
776
777 v9fs_invalidate_inode_attr(dir);
778 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
779 /* Get the latest stat info from server. */
780 struct p9_fid *fid;
781 fid = v9fs_fid_lookup(old_dentry);
782 if (IS_ERR(fid))
783 return PTR_ERR(fid);
784
785 v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
786 }
787 ihold(old_dentry->d_inode);
788 d_instantiate(dentry, old_dentry->d_inode);
789
790 return err;
791}
792
793/**
794 * v9fs_vfs_mknod_dotl - create a special file
795 * @dir: inode destination for new link
796 * @dentry: dentry for file
797 * @mode: mode for creation
798 * @rdev: device associated with special file
799 *
800 */
801static int
802v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
803 dev_t rdev)
804{
805 int err;
806 gid_t gid;
807 char *name;
808 umode_t mode;
809 struct v9fs_session_info *v9ses;
810 struct p9_fid *fid = NULL, *dfid = NULL;
811 struct inode *inode;
812 struct p9_qid qid;
813 struct dentry *dir_dentry;
814 struct posix_acl *dacl = NULL, *pacl = NULL;
815
816 P9_DPRINTK(P9_DEBUG_VFS,
817 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
818 dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
819
820 if (!new_valid_dev(rdev))
821 return -EINVAL;
822
823 v9ses = v9fs_inode2v9ses(dir);
824 dir_dentry = v9fs_dentry_from_dir_inode(dir);
825 dfid = v9fs_fid_lookup(dir_dentry);
826 if (IS_ERR(dfid)) {
827 err = PTR_ERR(dfid);
828 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
829 dfid = NULL;
830 goto error;
831 }
832
833 gid = v9fs_get_fsgid_for_create(dir);
834 mode = omode;
835 /* Update mode based on ACL value */
836 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
837 if (err) {
838 P9_DPRINTK(P9_DEBUG_VFS,
839 "Failed to get acl values in mknod %d\n", err);
840 goto error;
841 }
842 name = (char *) dentry->d_name.name;
843
844 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
845 if (err < 0)
846 goto error;
847
848 v9fs_invalidate_inode_attr(dir);
849 /* instantiate inode and assign the unopened fid to the dentry */
850 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
851 fid = p9_client_walk(dfid, 1, &name, 1);
852 if (IS_ERR(fid)) {
853 err = PTR_ERR(fid);
854 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
855 err);
856 fid = NULL;
857 goto error;
858 }
859
860 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
861 if (IS_ERR(inode)) {
862 err = PTR_ERR(inode);
863 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
864 err);
865 goto error;
866 }
867 err = v9fs_fid_add(dentry, fid);
868 if (err < 0)
869 goto error;
870 d_instantiate(dentry, inode);
871 fid = NULL;
872 } else {
873 /*
874 * Not in cached mode. No need to populate inode with stat.
875 * socket syscall returns a fd, so we need instantiate
876 */
877 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
878 if (IS_ERR(inode)) {
879 err = PTR_ERR(inode);
880 goto error;
881 }
882 d_instantiate(dentry, inode);
883 }
884 /* Now set the ACL based on the default value */
885 v9fs_set_create_acl(dentry, &dacl, &pacl);
886error:
887 if (fid)
888 p9_client_clunk(fid);
889 v9fs_set_create_acl(NULL, &dacl, &pacl);
890 return err;
891}
892
893/**
894 * v9fs_vfs_follow_link_dotl - follow a symlink path
895 * @dentry: dentry for symlink
896 * @nd: nameidata
897 *
898 */
899
900static void *
901v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
902{
903 int retval;
904 struct p9_fid *fid;
905 char *link = __getname();
906 char *target;
907
908 P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
909
910 if (!link) {
911 link = ERR_PTR(-ENOMEM);
912 goto ndset;
913 }
914 fid = v9fs_fid_lookup(dentry);
915 if (IS_ERR(fid)) {
916 __putname(link);
917 link = ERR_CAST(fid);
918 goto ndset;
919 }
920 retval = p9_client_readlink(fid, &target);
921 if (!retval) {
922 strcpy(link, target);
923 kfree(target);
924 goto ndset;
925 }
926 __putname(link);
927 link = ERR_PTR(retval);
928ndset:
929 nd_set_link(nd, link);
930 return NULL;
931}
932
933int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
934{
935 loff_t i_size;
936 struct p9_stat_dotl *st;
937 struct v9fs_session_info *v9ses;
938
939 v9ses = v9fs_inode2v9ses(inode);
940 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
941 if (IS_ERR(st))
942 return PTR_ERR(st);
943 /*
944 * Don't update inode if the file type is different
945 */
946 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
947 goto out;
948
949 spin_lock(&inode->i_lock);
950 /*
951 * We don't want to refresh inode->i_size,
952 * because we may have cached data
953 */
954 i_size = inode->i_size;
955 v9fs_stat2inode_dotl(st, inode);
956 if (v9ses->cache)
957 inode->i_size = i_size;
958 spin_unlock(&inode->i_lock);
959out:
960 kfree(st);
961 return 0;
962}
963
964const struct inode_operations v9fs_dir_inode_operations_dotl = {
965 .create = v9fs_vfs_create_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 .follow_link = v9fs_vfs_follow_link_dotl,
996 .put_link = v9fs_vfs_put_link,
997 .getattr = v9fs_vfs_getattr_dotl,
998 .setattr = v9fs_vfs_setattr_dotl,
999 .setxattr = generic_setxattr,
1000 .getxattr = generic_getxattr,
1001 .removexattr = generic_removexattr,
1002 .listxattr = v9fs_listxattr,
1003};
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/namei.h>
17#include <linux/sched.h>
18#include <linux/slab.h>
19#include <linux/xattr.h>
20#include <linux/posix_acl.h>
21#include <net/9p/9p.h>
22#include <net/9p/client.h>
23
24#include "v9fs.h"
25#include "v9fs_vfs.h"
26#include "fid.h"
27#include "cache.h"
28#include "xattr.h"
29#include "acl.h"
30
31static int
32v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
33 struct dentry *dentry, umode_t omode, dev_t rdev);
34
35/**
36 * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
37 * @dir_inode: The directory inode
38 *
39 * Helper function to get the gid for creating a
40 * new file system object. This checks the S_ISGID to determine the owning
41 * group of the new file system object.
42 */
43
44static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
45{
46 BUG_ON(dir_inode == NULL);
47
48 if (dir_inode->i_mode & S_ISGID) {
49 /* set_gid bit is set.*/
50 return dir_inode->i_gid;
51 }
52 return current_fsgid();
53}
54
55static int v9fs_test_inode_dotl(struct inode *inode, void *data)
56{
57 struct v9fs_inode *v9inode = V9FS_I(inode);
58 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
59
60 /* don't match inode of different type */
61 if (inode_wrong_type(inode, st->st_mode))
62 return 0;
63
64 if (inode->i_generation != st->st_gen)
65 return 0;
66
67 /* compare qid details */
68 if (memcmp(&v9inode->qid.version,
69 &st->qid.version, sizeof(v9inode->qid.version)))
70 return 0;
71
72 if (v9inode->qid.type != st->qid.type)
73 return 0;
74
75 if (v9inode->qid.path != st->qid.path)
76 return 0;
77 return 1;
78}
79
80/* Always get a new inode */
81static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
82{
83 return 0;
84}
85
86static int v9fs_set_inode_dotl(struct inode *inode, void *data)
87{
88 struct v9fs_inode *v9inode = V9FS_I(inode);
89 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
90
91 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
92 inode->i_generation = st->st_gen;
93 return 0;
94}
95
96static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
97 struct p9_qid *qid,
98 struct p9_fid *fid,
99 struct p9_stat_dotl *st,
100 int new)
101{
102 int retval;
103 unsigned long i_ino;
104 struct inode *inode;
105 struct v9fs_session_info *v9ses = sb->s_fs_info;
106 int (*test)(struct inode *inode, void *data);
107
108 if (new)
109 test = v9fs_test_new_inode_dotl;
110 else
111 test = v9fs_test_inode_dotl;
112
113 i_ino = v9fs_qid2ino(qid);
114 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
115 if (!inode)
116 return ERR_PTR(-ENOMEM);
117 if (!(inode->i_state & I_NEW))
118 return inode;
119 /*
120 * initialize the inode with the stat info
121 * FIXME!! we may need support for stale inodes
122 * later.
123 */
124 inode->i_ino = i_ino;
125 retval = v9fs_init_inode(v9ses, inode,
126 st->st_mode, new_decode_dev(st->st_rdev));
127 if (retval)
128 goto error;
129
130 v9fs_stat2inode_dotl(st, inode, 0);
131 v9fs_set_netfs_context(inode);
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 * @idmap: 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 mnt_idmap *idmap, struct inode *dir,
223 struct dentry *dentry, umode_t omode, bool excl)
224{
225 return v9fs_vfs_mknod_dotl(idmap, 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 int p9_omode = v9fs_open_to_dotl_flags(flags);
236 const unsigned char *name = NULL;
237 struct p9_qid qid;
238 struct inode *inode;
239 struct p9_fid *fid = NULL;
240 struct p9_fid *dfid = NULL, *ofid = 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 create %d\n",
286 err);
287 goto out;
288 }
289
290 if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) {
291 p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR;
292 p9_debug(P9_DEBUG_CACHE,
293 "write-only file with writeback enabled, creating w/ O_RDWR\n");
294 }
295 err = p9_client_create_dotl(ofid, name, p9_omode, mode, gid, &qid);
296 if (err < 0) {
297 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in create %d\n",
298 err);
299 goto out;
300 }
301 v9fs_invalidate_inode_attr(dir);
302
303 /* instantiate inode and assign the unopened fid to the dentry */
304 fid = p9_client_walk(dfid, 1, &name, 1);
305 if (IS_ERR(fid)) {
306 err = PTR_ERR(fid);
307 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
308 goto out;
309 }
310 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
311 if (IS_ERR(inode)) {
312 err = PTR_ERR(inode);
313 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
314 goto out;
315 }
316 /* Now set the ACL based on the default value */
317 v9fs_set_create_acl(inode, fid, dacl, pacl);
318
319 v9fs_fid_add(dentry, &fid);
320 d_instantiate(dentry, inode);
321
322 /* Since we are opening a file, assign the open fid to the file */
323 err = finish_open(file, dentry, generic_file_open);
324 if (err)
325 goto out;
326 file->private_data = ofid;
327#ifdef CONFIG_9P_FSCACHE
328 if (v9ses->cache & CACHE_FSCACHE) {
329 struct v9fs_inode *v9inode = V9FS_I(inode);
330 fscache_use_cookie(v9fs_inode_cookie(v9inode),
331 file->f_mode & FMODE_WRITE);
332 }
333#endif
334 v9fs_fid_add_modes(ofid, v9ses->flags, v9ses->cache, flags);
335 v9fs_open_fid_add(inode, &ofid);
336 file->f_mode |= FMODE_CREATED;
337out:
338 p9_fid_put(dfid);
339 p9_fid_put(ofid);
340 p9_fid_put(fid);
341 v9fs_put_acl(dacl, pacl);
342 dput(res);
343 return err;
344}
345
346/**
347 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
348 * @idmap: The idmap of the mount
349 * @dir: inode that is being unlinked
350 * @dentry: dentry that is being unlinked
351 * @omode: mode for new directory
352 *
353 */
354
355static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap,
356 struct inode *dir, struct dentry *dentry,
357 umode_t omode)
358{
359 int err;
360 struct v9fs_session_info *v9ses;
361 struct p9_fid *fid = NULL, *dfid = NULL;
362 kgid_t gid;
363 const unsigned char *name;
364 umode_t mode;
365 struct inode *inode;
366 struct p9_qid qid;
367 struct posix_acl *dacl = NULL, *pacl = NULL;
368
369 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
370 v9ses = v9fs_inode2v9ses(dir);
371
372 omode |= S_IFDIR;
373 if (dir->i_mode & S_ISGID)
374 omode |= S_ISGID;
375
376 dfid = v9fs_parent_fid(dentry);
377 if (IS_ERR(dfid)) {
378 err = PTR_ERR(dfid);
379 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
380 goto error;
381 }
382
383 gid = v9fs_get_fsgid_for_create(dir);
384 mode = omode;
385 /* Update mode based on ACL value */
386 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
387 if (err) {
388 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
389 err);
390 goto error;
391 }
392 name = dentry->d_name.name;
393 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
394 if (err < 0)
395 goto error;
396 fid = p9_client_walk(dfid, 1, &name, 1);
397 if (IS_ERR(fid)) {
398 err = PTR_ERR(fid);
399 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
400 err);
401 goto error;
402 }
403
404 /* instantiate inode and assign the unopened fid to the dentry */
405 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
406 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
407 if (IS_ERR(inode)) {
408 err = PTR_ERR(inode);
409 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
410 err);
411 goto error;
412 }
413 v9fs_fid_add(dentry, &fid);
414 v9fs_set_create_acl(inode, fid, dacl, pacl);
415 d_instantiate(dentry, inode);
416 err = 0;
417 } else {
418 /*
419 * Not in cached mode. No need to populate
420 * inode with stat. We need to get an inode
421 * so that we can set the acl with dentry
422 */
423 inode = v9fs_get_inode(dir->i_sb, mode, 0);
424 if (IS_ERR(inode)) {
425 err = PTR_ERR(inode);
426 goto error;
427 }
428 v9fs_set_create_acl(inode, fid, dacl, pacl);
429 d_instantiate(dentry, inode);
430 }
431 inc_nlink(dir);
432 v9fs_invalidate_inode_attr(dir);
433error:
434 p9_fid_put(fid);
435 v9fs_put_acl(dacl, pacl);
436 p9_fid_put(dfid);
437 return err;
438}
439
440static int
441v9fs_vfs_getattr_dotl(struct mnt_idmap *idmap,
442 const struct path *path, struct kstat *stat,
443 u32 request_mask, unsigned int flags)
444{
445 struct dentry *dentry = path->dentry;
446 struct v9fs_session_info *v9ses;
447 struct p9_fid *fid;
448 struct inode *inode = d_inode(dentry);
449 struct p9_stat_dotl *st;
450
451 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
452 v9ses = v9fs_dentry2v9ses(dentry);
453 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
454 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
455 return 0;
456 } else if (v9ses->cache) {
457 if (S_ISREG(inode->i_mode)) {
458 int retval = filemap_fdatawrite(inode->i_mapping);
459
460 if (retval)
461 p9_debug(P9_DEBUG_ERROR,
462 "flushing writeback during getattr returned %d\n", retval);
463 }
464 }
465 fid = v9fs_fid_lookup(dentry);
466 if (IS_ERR(fid))
467 return PTR_ERR(fid);
468
469 /* Ask for all the fields in stat structure. Server will return
470 * whatever it supports
471 */
472
473 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
474 p9_fid_put(fid);
475 if (IS_ERR(st))
476 return PTR_ERR(st);
477
478 v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
479 generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat);
480 /* Change block size to what the server returned */
481 stat->blksize = st->st_blksize;
482
483 kfree(st);
484 return 0;
485}
486
487/*
488 * Attribute flags.
489 */
490#define P9_ATTR_MODE (1 << 0)
491#define P9_ATTR_UID (1 << 1)
492#define P9_ATTR_GID (1 << 2)
493#define P9_ATTR_SIZE (1 << 3)
494#define P9_ATTR_ATIME (1 << 4)
495#define P9_ATTR_MTIME (1 << 5)
496#define P9_ATTR_CTIME (1 << 6)
497#define P9_ATTR_ATIME_SET (1 << 7)
498#define P9_ATTR_MTIME_SET (1 << 8)
499
500struct dotl_iattr_map {
501 int iattr_valid;
502 int p9_iattr_valid;
503};
504
505static int v9fs_mapped_iattr_valid(int iattr_valid)
506{
507 int i;
508 int p9_iattr_valid = 0;
509 struct dotl_iattr_map dotl_iattr_map[] = {
510 { ATTR_MODE, P9_ATTR_MODE },
511 { ATTR_UID, P9_ATTR_UID },
512 { ATTR_GID, P9_ATTR_GID },
513 { ATTR_SIZE, P9_ATTR_SIZE },
514 { ATTR_ATIME, P9_ATTR_ATIME },
515 { ATTR_MTIME, P9_ATTR_MTIME },
516 { ATTR_CTIME, P9_ATTR_CTIME },
517 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
518 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
519 };
520 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
521 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
522 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
523 }
524 return p9_iattr_valid;
525}
526
527/**
528 * v9fs_vfs_setattr_dotl - set file metadata
529 * @idmap: idmap of the mount
530 * @dentry: file whose metadata to set
531 * @iattr: metadata assignment structure
532 *
533 */
534
535int v9fs_vfs_setattr_dotl(struct mnt_idmap *idmap,
536 struct dentry *dentry, struct iattr *iattr)
537{
538 int retval, use_dentry = 0;
539 struct inode *inode = d_inode(dentry);
540 struct v9fs_session_info __maybe_unused *v9ses;
541 struct p9_fid *fid = NULL;
542 struct p9_iattr_dotl p9attr = {
543 .uid = INVALID_UID,
544 .gid = INVALID_GID,
545 };
546
547 p9_debug(P9_DEBUG_VFS, "\n");
548
549 retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
550 if (retval)
551 return retval;
552
553 v9ses = v9fs_dentry2v9ses(dentry);
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 retval = filemap_fdatawrite(inode->i_mapping);
587 if (retval < 0)
588 p9_debug(P9_DEBUG_ERROR,
589 "Flushing file prior to setattr failed: %d\n", retval);
590 }
591
592 retval = p9_client_setattr(fid, &p9attr);
593 if (retval < 0) {
594 if (use_dentry)
595 p9_fid_put(fid);
596 return retval;
597 }
598
599 if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size !=
600 i_size_read(inode)) {
601 truncate_setsize(inode, iattr->ia_size);
602 netfs_resize_file(netfs_inode(inode), iattr->ia_size, true);
603
604#ifdef CONFIG_9P_FSCACHE
605 if (v9ses->cache & CACHE_FSCACHE)
606 fscache_resize_cookie(v9fs_inode_cookie(V9FS_I(inode)),
607 iattr->ia_size);
608#endif
609 }
610
611 v9fs_invalidate_inode_attr(inode);
612 setattr_copy(&nop_mnt_idmap, inode, iattr);
613 mark_inode_dirty(inode);
614 if (iattr->ia_valid & ATTR_MODE) {
615 /* We also want to update ACL when we update mode bits */
616 retval = v9fs_acl_chmod(inode, fid);
617 if (retval < 0) {
618 if (use_dentry)
619 p9_fid_put(fid);
620 return retval;
621 }
622 }
623 if (use_dentry)
624 p9_fid_put(fid);
625
626 return 0;
627}
628
629/**
630 * v9fs_stat2inode_dotl - populate an inode structure with stat info
631 * @stat: stat structure
632 * @inode: inode to populate
633 * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
634 *
635 */
636
637void
638v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
639 unsigned int flags)
640{
641 umode_t mode;
642 struct v9fs_inode *v9inode = V9FS_I(inode);
643
644 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
645 inode_set_atime(inode, stat->st_atime_sec,
646 stat->st_atime_nsec);
647 inode_set_mtime(inode, stat->st_mtime_sec,
648 stat->st_mtime_nsec);
649 inode_set_ctime(inode, stat->st_ctime_sec,
650 stat->st_ctime_nsec);
651 inode->i_uid = stat->st_uid;
652 inode->i_gid = stat->st_gid;
653 set_nlink(inode, stat->st_nlink);
654
655 mode = stat->st_mode & S_IALLUGO;
656 mode |= inode->i_mode & ~S_IALLUGO;
657 inode->i_mode = mode;
658
659 v9inode->netfs.remote_i_size = stat->st_size;
660 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
661 v9fs_i_size_write(inode, stat->st_size);
662 inode->i_blocks = stat->st_blocks;
663 } else {
664 if (stat->st_result_mask & P9_STATS_ATIME) {
665 inode_set_atime(inode, stat->st_atime_sec,
666 stat->st_atime_nsec);
667 }
668 if (stat->st_result_mask & P9_STATS_MTIME) {
669 inode_set_mtime(inode, stat->st_mtime_sec,
670 stat->st_mtime_nsec);
671 }
672 if (stat->st_result_mask & P9_STATS_CTIME) {
673 inode_set_ctime(inode, stat->st_ctime_sec,
674 stat->st_ctime_nsec);
675 }
676 if (stat->st_result_mask & P9_STATS_UID)
677 inode->i_uid = stat->st_uid;
678 if (stat->st_result_mask & P9_STATS_GID)
679 inode->i_gid = stat->st_gid;
680 if (stat->st_result_mask & P9_STATS_NLINK)
681 set_nlink(inode, stat->st_nlink);
682 if (stat->st_result_mask & P9_STATS_MODE) {
683 mode = stat->st_mode & S_IALLUGO;
684 mode |= inode->i_mode & ~S_IALLUGO;
685 inode->i_mode = mode;
686 }
687 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
688 stat->st_result_mask & P9_STATS_SIZE) {
689 v9inode->netfs.remote_i_size = stat->st_size;
690 v9fs_i_size_write(inode, stat->st_size);
691 }
692 if (stat->st_result_mask & P9_STATS_BLOCKS)
693 inode->i_blocks = stat->st_blocks;
694 }
695 if (stat->st_result_mask & P9_STATS_GEN)
696 inode->i_generation = stat->st_gen;
697
698 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
699 * because the inode structure does not have fields for them.
700 */
701 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
702}
703
704static int
705v9fs_vfs_symlink_dotl(struct mnt_idmap *idmap, struct inode *dir,
706 struct dentry *dentry, const char *symname)
707{
708 int err;
709 kgid_t gid;
710 const unsigned char *name;
711 struct p9_qid qid;
712 struct inode *inode;
713 struct p9_fid *dfid;
714 struct p9_fid *fid = NULL;
715 struct v9fs_session_info *v9ses;
716
717 name = dentry->d_name.name;
718 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
719 v9ses = v9fs_inode2v9ses(dir);
720
721 dfid = v9fs_parent_fid(dentry);
722 if (IS_ERR(dfid)) {
723 err = PTR_ERR(dfid);
724 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
725 return err;
726 }
727
728 gid = v9fs_get_fsgid_for_create(dir);
729
730 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
731 err = p9_client_symlink(dfid, name, symname, gid, &qid);
732
733 if (err < 0) {
734 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
735 goto error;
736 }
737
738 v9fs_invalidate_inode_attr(dir);
739 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
740 /* Now walk from the parent so we can get an unopened fid. */
741 fid = p9_client_walk(dfid, 1, &name, 1);
742 if (IS_ERR(fid)) {
743 err = PTR_ERR(fid);
744 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
745 err);
746 goto error;
747 }
748
749 /* instantiate inode and assign the unopened fid to dentry */
750 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
751 if (IS_ERR(inode)) {
752 err = PTR_ERR(inode);
753 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
754 err);
755 goto error;
756 }
757 v9fs_fid_add(dentry, &fid);
758 d_instantiate(dentry, inode);
759 err = 0;
760 } else {
761 /* Not in cached mode. No need to populate inode with stat */
762 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
763 if (IS_ERR(inode)) {
764 err = PTR_ERR(inode);
765 goto error;
766 }
767 d_instantiate(dentry, inode);
768 }
769
770error:
771 p9_fid_put(fid);
772 p9_fid_put(dfid);
773 return err;
774}
775
776/**
777 * v9fs_vfs_link_dotl - create a hardlink for dotl
778 * @old_dentry: dentry for file to link to
779 * @dir: inode destination for new link
780 * @dentry: dentry for link
781 *
782 */
783
784static int
785v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
786 struct dentry *dentry)
787{
788 int err;
789 struct p9_fid *dfid, *oldfid;
790 struct v9fs_session_info *v9ses;
791
792 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
793 dir->i_ino, old_dentry, dentry);
794
795 v9ses = v9fs_inode2v9ses(dir);
796 dfid = v9fs_parent_fid(dentry);
797 if (IS_ERR(dfid))
798 return PTR_ERR(dfid);
799
800 oldfid = v9fs_fid_lookup(old_dentry);
801 if (IS_ERR(oldfid)) {
802 p9_fid_put(dfid);
803 return PTR_ERR(oldfid);
804 }
805
806 err = p9_client_link(dfid, oldfid, dentry->d_name.name);
807
808 p9_fid_put(dfid);
809 p9_fid_put(oldfid);
810 if (err < 0) {
811 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
812 return err;
813 }
814
815 v9fs_invalidate_inode_attr(dir);
816 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
817 /* Get the latest stat info from server. */
818 struct p9_fid *fid;
819
820 fid = v9fs_fid_lookup(old_dentry);
821 if (IS_ERR(fid))
822 return PTR_ERR(fid);
823
824 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
825 p9_fid_put(fid);
826 }
827 ihold(d_inode(old_dentry));
828 d_instantiate(dentry, d_inode(old_dentry));
829
830 return err;
831}
832
833/**
834 * v9fs_vfs_mknod_dotl - create a special file
835 * @idmap: The idmap of the mount
836 * @dir: inode destination for new link
837 * @dentry: dentry for file
838 * @omode: mode for creation
839 * @rdev: device associated with special file
840 *
841 */
842static int
843v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
844 struct dentry *dentry, umode_t omode, dev_t rdev)
845{
846 int err;
847 kgid_t gid;
848 const unsigned char *name;
849 umode_t mode;
850 struct v9fs_session_info *v9ses;
851 struct p9_fid *fid = NULL, *dfid = NULL;
852 struct inode *inode;
853 struct p9_qid qid;
854 struct posix_acl *dacl = NULL, *pacl = NULL;
855
856 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
857 dir->i_ino, dentry, omode,
858 MAJOR(rdev), MINOR(rdev));
859
860 v9ses = v9fs_inode2v9ses(dir);
861 dfid = v9fs_parent_fid(dentry);
862 if (IS_ERR(dfid)) {
863 err = PTR_ERR(dfid);
864 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
865 goto error;
866 }
867
868 gid = v9fs_get_fsgid_for_create(dir);
869 mode = omode;
870 /* Update mode based on ACL value */
871 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
872 if (err) {
873 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
874 err);
875 goto error;
876 }
877 name = dentry->d_name.name;
878
879 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
880 if (err < 0)
881 goto error;
882
883 v9fs_invalidate_inode_attr(dir);
884 fid = p9_client_walk(dfid, 1, &name, 1);
885 if (IS_ERR(fid)) {
886 err = PTR_ERR(fid);
887 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
888 err);
889 goto error;
890 }
891
892 /* instantiate inode and assign the unopened fid to the dentry */
893 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
894 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
895 if (IS_ERR(inode)) {
896 err = PTR_ERR(inode);
897 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
898 err);
899 goto error;
900 }
901 v9fs_set_create_acl(inode, fid, dacl, pacl);
902 v9fs_fid_add(dentry, &fid);
903 d_instantiate(dentry, inode);
904 err = 0;
905 } else {
906 /*
907 * Not in cached mode. No need to populate inode with stat.
908 * socket syscall returns a fd, so we need instantiate
909 */
910 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
911 if (IS_ERR(inode)) {
912 err = PTR_ERR(inode);
913 goto error;
914 }
915 v9fs_set_create_acl(inode, fid, dacl, pacl);
916 d_instantiate(dentry, inode);
917 }
918error:
919 p9_fid_put(fid);
920 v9fs_put_acl(dacl, pacl);
921 p9_fid_put(dfid);
922
923 return err;
924}
925
926/**
927 * v9fs_vfs_get_link_dotl - follow a symlink path
928 * @dentry: dentry for symlink
929 * @inode: inode for symlink
930 * @done: destructor for return value
931 */
932
933static const char *
934v9fs_vfs_get_link_dotl(struct dentry *dentry,
935 struct inode *inode,
936 struct delayed_call *done)
937{
938 struct p9_fid *fid;
939 char *target;
940 int retval;
941
942 if (!dentry)
943 return ERR_PTR(-ECHILD);
944
945 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
946
947 fid = v9fs_fid_lookup(dentry);
948 if (IS_ERR(fid))
949 return ERR_CAST(fid);
950 retval = p9_client_readlink(fid, &target);
951 p9_fid_put(fid);
952 if (retval)
953 return ERR_PTR(retval);
954 set_delayed_call(done, kfree_link, target);
955 return target;
956}
957
958int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
959{
960 struct p9_stat_dotl *st;
961 struct v9fs_session_info *v9ses;
962 unsigned int flags;
963
964 v9ses = v9fs_inode2v9ses(inode);
965 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
966 if (IS_ERR(st))
967 return PTR_ERR(st);
968 /*
969 * Don't update inode if the file type is different
970 */
971 if (inode_wrong_type(inode, st->st_mode))
972 goto out;
973
974 /*
975 * We don't want to refresh inode->i_size,
976 * because we may have cached data
977 */
978 flags = (v9ses->cache & CACHE_LOOSE) ?
979 V9FS_STAT2INODE_KEEP_ISIZE : 0;
980 v9fs_stat2inode_dotl(st, inode, flags);
981out:
982 kfree(st);
983 return 0;
984}
985
986const struct inode_operations v9fs_dir_inode_operations_dotl = {
987 .create = v9fs_vfs_create_dotl,
988 .atomic_open = v9fs_vfs_atomic_open_dotl,
989 .lookup = v9fs_vfs_lookup,
990 .link = v9fs_vfs_link_dotl,
991 .symlink = v9fs_vfs_symlink_dotl,
992 .unlink = v9fs_vfs_unlink,
993 .mkdir = v9fs_vfs_mkdir_dotl,
994 .rmdir = v9fs_vfs_rmdir,
995 .mknod = v9fs_vfs_mknod_dotl,
996 .rename = v9fs_vfs_rename,
997 .getattr = v9fs_vfs_getattr_dotl,
998 .setattr = v9fs_vfs_setattr_dotl,
999 .listxattr = v9fs_listxattr,
1000 .get_inode_acl = v9fs_iop_get_inode_acl,
1001 .get_acl = v9fs_iop_get_acl,
1002 .set_acl = v9fs_iop_set_acl,
1003};
1004
1005const struct inode_operations v9fs_file_inode_operations_dotl = {
1006 .getattr = v9fs_vfs_getattr_dotl,
1007 .setattr = v9fs_vfs_setattr_dotl,
1008 .listxattr = v9fs_listxattr,
1009 .get_inode_acl = v9fs_iop_get_inode_acl,
1010 .get_acl = v9fs_iop_get_acl,
1011 .set_acl = v9fs_iop_set_acl,
1012};
1013
1014const struct inode_operations v9fs_symlink_inode_operations_dotl = {
1015 .get_link = v9fs_vfs_get_link_dotl,
1016 .getattr = v9fs_vfs_getattr_dotl,
1017 .setattr = v9fs_vfs_setattr_dotl,
1018 .listxattr = v9fs_listxattr,
1019};