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1/*
2 * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
3 *
4 * This software may be freely redistributed under the terms of the
5 * GNU General Public License.
6 *
7 * You should have received a copy of the GNU General Public License
8 * along with this program; if not, write to the Free Software
9 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
10 *
11 * Authors: David Woodhouse <dwmw2@infradead.org>
12 * David Howells <dhowells@redhat.com>
13 *
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/fs.h>
20#include <linux/pagemap.h>
21#include <linux/sched.h>
22#include <linux/mount.h>
23#include <linux/namei.h>
24#include <linux/iversion.h>
25#include "internal.h"
26
27static const struct inode_operations afs_symlink_inode_operations = {
28 .get_link = page_get_link,
29 .listxattr = afs_listxattr,
30};
31
32/*
33 * Initialise an inode from the vnode status.
34 */
35static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
36{
37 struct inode *inode = AFS_VNODE_TO_I(vnode);
38
39 _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
40 vnode->status.type,
41 vnode->status.nlink,
42 (unsigned long long) vnode->status.size,
43 vnode->status.data_version,
44 vnode->status.mode);
45
46 read_seqlock_excl(&vnode->cb_lock);
47
48 afs_update_inode_from_status(vnode, &vnode->status, NULL,
49 AFS_VNODE_NOT_YET_SET);
50
51 switch (vnode->status.type) {
52 case AFS_FTYPE_FILE:
53 inode->i_mode = S_IFREG | vnode->status.mode;
54 inode->i_op = &afs_file_inode_operations;
55 inode->i_fop = &afs_file_operations;
56 inode->i_mapping->a_ops = &afs_fs_aops;
57 break;
58 case AFS_FTYPE_DIR:
59 inode->i_mode = S_IFDIR | vnode->status.mode;
60 inode->i_op = &afs_dir_inode_operations;
61 inode->i_fop = &afs_dir_file_operations;
62 inode->i_mapping->a_ops = &afs_dir_aops;
63 break;
64 case AFS_FTYPE_SYMLINK:
65 /* Symlinks with a mode of 0644 are actually mountpoints. */
66 if ((vnode->status.mode & 0777) == 0644) {
67 inode->i_flags |= S_AUTOMOUNT;
68
69 set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
70
71 inode->i_mode = S_IFDIR | 0555;
72 inode->i_op = &afs_mntpt_inode_operations;
73 inode->i_fop = &afs_mntpt_file_operations;
74 inode->i_mapping->a_ops = &afs_fs_aops;
75 } else {
76 inode->i_mode = S_IFLNK | vnode->status.mode;
77 inode->i_op = &afs_symlink_inode_operations;
78 inode->i_mapping->a_ops = &afs_fs_aops;
79 }
80 inode_nohighmem(inode);
81 break;
82 default:
83 printk("kAFS: AFS vnode with undefined type\n");
84 read_sequnlock_excl(&vnode->cb_lock);
85 return afs_protocol_error(NULL, -EBADMSG);
86 }
87
88 inode->i_blocks = 0;
89 vnode->invalid_before = vnode->status.data_version;
90
91 read_sequnlock_excl(&vnode->cb_lock);
92 return 0;
93}
94
95/*
96 * Fetch file status from the volume.
97 */
98int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool new_inode)
99{
100 struct afs_fs_cursor fc;
101 int ret;
102
103 _enter("%s,{%x:%u.%u,S=%lx}",
104 vnode->volume->name,
105 vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique,
106 vnode->flags);
107
108 ret = -ERESTARTSYS;
109 if (afs_begin_vnode_operation(&fc, vnode, key)) {
110 while (afs_select_fileserver(&fc)) {
111 fc.cb_break = afs_calc_vnode_cb_break(vnode);
112 afs_fs_fetch_file_status(&fc, NULL, new_inode);
113 }
114
115 afs_check_for_remote_deletion(&fc, fc.vnode);
116 afs_vnode_commit_status(&fc, vnode, fc.cb_break);
117 ret = afs_end_vnode_operation(&fc);
118 }
119
120 _leave(" = %d", ret);
121 return ret;
122}
123
124/*
125 * iget5() comparator
126 */
127int afs_iget5_test(struct inode *inode, void *opaque)
128{
129 struct afs_iget_data *data = opaque;
130
131 return inode->i_ino == data->fid.vnode &&
132 inode->i_generation == data->fid.unique;
133}
134
135/*
136 * iget5() comparator for inode created by autocell operations
137 *
138 * These pseudo inodes don't match anything.
139 */
140static int afs_iget5_pseudo_dir_test(struct inode *inode, void *opaque)
141{
142 return 0;
143}
144
145/*
146 * iget5() inode initialiser
147 */
148static int afs_iget5_set(struct inode *inode, void *opaque)
149{
150 struct afs_iget_data *data = opaque;
151 struct afs_vnode *vnode = AFS_FS_I(inode);
152
153 inode->i_ino = data->fid.vnode;
154 inode->i_generation = data->fid.unique;
155 vnode->fid = data->fid;
156 vnode->volume = data->volume;
157
158 return 0;
159}
160
161/*
162 * Create an inode for a dynamic root directory or an autocell dynamic
163 * automount dir.
164 */
165struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root)
166{
167 struct afs_iget_data data;
168 struct afs_super_info *as;
169 struct afs_vnode *vnode;
170 struct inode *inode;
171 static atomic_t afs_autocell_ino;
172
173 _enter("");
174
175 as = sb->s_fs_info;
176 if (as->volume) {
177 data.volume = as->volume;
178 data.fid.vid = as->volume->vid;
179 }
180 if (root) {
181 data.fid.vnode = 1;
182 data.fid.unique = 1;
183 } else {
184 data.fid.vnode = atomic_inc_return(&afs_autocell_ino);
185 data.fid.unique = 0;
186 }
187
188 inode = iget5_locked(sb, data.fid.vnode,
189 afs_iget5_pseudo_dir_test, afs_iget5_set,
190 &data);
191 if (!inode) {
192 _leave(" = -ENOMEM");
193 return ERR_PTR(-ENOMEM);
194 }
195
196 _debug("GOT INODE %p { ino=%lu, vl=%x, vn=%x, u=%x }",
197 inode, inode->i_ino, data.fid.vid, data.fid.vnode,
198 data.fid.unique);
199
200 vnode = AFS_FS_I(inode);
201
202 /* there shouldn't be an existing inode */
203 BUG_ON(!(inode->i_state & I_NEW));
204
205 inode->i_size = 0;
206 inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
207 if (root) {
208 inode->i_op = &afs_dynroot_inode_operations;
209 inode->i_fop = &afs_dynroot_file_operations;
210 } else {
211 inode->i_op = &afs_autocell_inode_operations;
212 }
213 set_nlink(inode, 2);
214 inode->i_uid = GLOBAL_ROOT_UID;
215 inode->i_gid = GLOBAL_ROOT_GID;
216 inode->i_ctime.tv_sec = get_seconds();
217 inode->i_ctime.tv_nsec = 0;
218 inode->i_atime = inode->i_mtime = inode->i_ctime;
219 inode->i_blocks = 0;
220 inode_set_iversion_raw(inode, 0);
221 inode->i_generation = 0;
222
223 set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags);
224 if (!root) {
225 set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
226 inode->i_flags |= S_AUTOMOUNT;
227 }
228
229 inode->i_flags |= S_NOATIME;
230 unlock_new_inode(inode);
231 _leave(" = %p", inode);
232 return inode;
233}
234
235/*
236 * Get a cache cookie for an inode.
237 */
238static void afs_get_inode_cache(struct afs_vnode *vnode)
239{
240#ifdef CONFIG_AFS_FSCACHE
241 struct {
242 u32 vnode_id;
243 u32 unique;
244 u32 vnode_id_ext[2]; /* Allow for a 96-bit key */
245 } __packed key;
246 struct afs_vnode_cache_aux aux;
247
248 if (vnode->status.type == AFS_FTYPE_DIR) {
249 vnode->cache = NULL;
250 return;
251 }
252
253 key.vnode_id = vnode->fid.vnode;
254 key.unique = vnode->fid.unique;
255 key.vnode_id_ext[0] = 0;
256 key.vnode_id_ext[1] = 0;
257 aux.data_version = vnode->status.data_version;
258
259 vnode->cache = fscache_acquire_cookie(vnode->volume->cache,
260 &afs_vnode_cache_index_def,
261 &key, sizeof(key),
262 &aux, sizeof(aux),
263 vnode, vnode->status.size, true);
264#endif
265}
266
267/*
268 * inode retrieval
269 */
270struct inode *afs_iget(struct super_block *sb, struct key *key,
271 struct afs_fid *fid, struct afs_file_status *status,
272 struct afs_callback *cb, struct afs_cb_interest *cbi)
273{
274 struct afs_iget_data data = { .fid = *fid };
275 struct afs_super_info *as;
276 struct afs_vnode *vnode;
277 struct inode *inode;
278 int ret;
279
280 _enter(",{%x:%u.%u},,", fid->vid, fid->vnode, fid->unique);
281
282 as = sb->s_fs_info;
283 data.volume = as->volume;
284
285 inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set,
286 &data);
287 if (!inode) {
288 _leave(" = -ENOMEM");
289 return ERR_PTR(-ENOMEM);
290 }
291
292 _debug("GOT INODE %p { vl=%x vn=%x, u=%x }",
293 inode, fid->vid, fid->vnode, fid->unique);
294
295 vnode = AFS_FS_I(inode);
296
297 /* deal with an existing inode */
298 if (!(inode->i_state & I_NEW)) {
299 _leave(" = %p", inode);
300 return inode;
301 }
302
303 if (!status) {
304 /* it's a remotely extant inode */
305 ret = afs_fetch_status(vnode, key, true);
306 if (ret < 0)
307 goto bad_inode;
308 } else {
309 /* it's an inode we just created */
310 memcpy(&vnode->status, status, sizeof(vnode->status));
311
312 if (!cb) {
313 /* it's a symlink we just created (the fileserver
314 * didn't give us a callback) */
315 vnode->cb_version = 0;
316 vnode->cb_type = 0;
317 vnode->cb_expires_at = 0;
318 } else {
319 vnode->cb_version = cb->version;
320 vnode->cb_type = cb->type;
321 vnode->cb_expires_at = cb->expiry;
322 vnode->cb_interest = afs_get_cb_interest(cbi);
323 set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
324 }
325
326 vnode->cb_expires_at += ktime_get_real_seconds();
327 }
328
329 ret = afs_inode_init_from_status(vnode, key);
330 if (ret < 0)
331 goto bad_inode;
332
333 afs_get_inode_cache(vnode);
334
335 /* success */
336 clear_bit(AFS_VNODE_UNSET, &vnode->flags);
337 inode->i_flags |= S_NOATIME;
338 unlock_new_inode(inode);
339 _leave(" = %p [CB { v=%u t=%u }]", inode, vnode->cb_version, vnode->cb_type);
340 return inode;
341
342 /* failure */
343bad_inode:
344 iget_failed(inode);
345 _leave(" = %d [bad]", ret);
346 return ERR_PTR(ret);
347}
348
349/*
350 * mark the data attached to an inode as obsolete due to a write on the server
351 * - might also want to ditch all the outstanding writes and dirty pages
352 */
353void afs_zap_data(struct afs_vnode *vnode)
354{
355 _enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
356
357#ifdef CONFIG_AFS_FSCACHE
358 fscache_invalidate(vnode->cache);
359#endif
360
361 /* nuke all the non-dirty pages that aren't locked, mapped or being
362 * written back in a regular file and completely discard the pages in a
363 * directory or symlink */
364 if (S_ISREG(vnode->vfs_inode.i_mode))
365 invalidate_remote_inode(&vnode->vfs_inode);
366 else
367 invalidate_inode_pages2(vnode->vfs_inode.i_mapping);
368}
369
370/*
371 * validate a vnode/inode
372 * - there are several things we need to check
373 * - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
374 * symlink)
375 * - parent dir metadata changed (security changes)
376 * - dentry data changed (write, truncate)
377 * - dentry metadata changed (security changes)
378 */
379int afs_validate(struct afs_vnode *vnode, struct key *key)
380{
381 time64_t now = ktime_get_real_seconds();
382 bool valid = false;
383 int ret;
384
385 _enter("{v={%x:%u} fl=%lx},%x",
386 vnode->fid.vid, vnode->fid.vnode, vnode->flags,
387 key_serial(key));
388
389 /* Quickly check the callback state. Ideally, we'd use read_seqbegin
390 * here, but we have no way to pass the net namespace to the RCU
391 * cleanup for the server record.
392 */
393 read_seqlock_excl(&vnode->cb_lock);
394
395 if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
396 if (vnode->cb_s_break != vnode->cb_interest->server->cb_s_break ||
397 vnode->cb_v_break != vnode->volume->cb_v_break) {
398 vnode->cb_s_break = vnode->cb_interest->server->cb_s_break;
399 vnode->cb_v_break = vnode->volume->cb_v_break;
400 valid = false;
401 } else if (vnode->status.type == AFS_FTYPE_DIR &&
402 test_bit(AFS_VNODE_DIR_VALID, &vnode->flags) &&
403 vnode->cb_expires_at - 10 > now) {
404 valid = true;
405 } else if (!test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags) &&
406 vnode->cb_expires_at - 10 > now) {
407 valid = true;
408 }
409 } else if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
410 valid = true;
411 }
412
413 read_sequnlock_excl(&vnode->cb_lock);
414
415 if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
416 clear_nlink(&vnode->vfs_inode);
417
418 if (valid)
419 goto valid;
420
421 down_write(&vnode->validate_lock);
422
423 /* if the promise has expired, we need to check the server again to get
424 * a new promise - note that if the (parent) directory's metadata was
425 * changed then the security may be different and we may no longer have
426 * access */
427 if (!test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
428 _debug("not promised");
429 ret = afs_fetch_status(vnode, key, false);
430 if (ret < 0) {
431 if (ret == -ENOENT) {
432 set_bit(AFS_VNODE_DELETED, &vnode->flags);
433 ret = -ESTALE;
434 }
435 goto error_unlock;
436 }
437 _debug("new promise [fl=%lx]", vnode->flags);
438 }
439
440 if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
441 _debug("file already deleted");
442 ret = -ESTALE;
443 goto error_unlock;
444 }
445
446 /* if the vnode's data version number changed then its contents are
447 * different */
448 if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags))
449 afs_zap_data(vnode);
450 up_write(&vnode->validate_lock);
451valid:
452 _leave(" = 0");
453 return 0;
454
455error_unlock:
456 up_write(&vnode->validate_lock);
457 _leave(" = %d", ret);
458 return ret;
459}
460
461/*
462 * read the attributes of an inode
463 */
464int afs_getattr(const struct path *path, struct kstat *stat,
465 u32 request_mask, unsigned int query_flags)
466{
467 struct inode *inode = d_inode(path->dentry);
468 struct afs_vnode *vnode = AFS_FS_I(inode);
469 int seq = 0;
470
471 _enter("{ ino=%lu v=%u }", inode->i_ino, inode->i_generation);
472
473 do {
474 read_seqbegin_or_lock(&vnode->cb_lock, &seq);
475 generic_fillattr(inode, stat);
476 } while (need_seqretry(&vnode->cb_lock, seq));
477
478 done_seqretry(&vnode->cb_lock, seq);
479 return 0;
480}
481
482/*
483 * discard an AFS inode
484 */
485int afs_drop_inode(struct inode *inode)
486{
487 _enter("");
488
489 if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags))
490 return generic_delete_inode(inode);
491 else
492 return generic_drop_inode(inode);
493}
494
495/*
496 * clear an AFS inode
497 */
498void afs_evict_inode(struct inode *inode)
499{
500 struct afs_vnode *vnode;
501
502 vnode = AFS_FS_I(inode);
503
504 _enter("{%x:%u.%d}",
505 vnode->fid.vid,
506 vnode->fid.vnode,
507 vnode->fid.unique);
508
509 _debug("CLEAR INODE %p", inode);
510
511 ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode);
512
513 truncate_inode_pages_final(&inode->i_data);
514 clear_inode(inode);
515
516 if (vnode->cb_interest) {
517 afs_put_cb_interest(afs_i2net(inode), vnode->cb_interest);
518 vnode->cb_interest = NULL;
519 }
520
521 while (!list_empty(&vnode->wb_keys)) {
522 struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next,
523 struct afs_wb_key, vnode_link);
524 list_del(&wbk->vnode_link);
525 afs_put_wb_key(wbk);
526 }
527
528#ifdef CONFIG_AFS_FSCACHE
529 {
530 struct afs_vnode_cache_aux aux;
531
532 aux.data_version = vnode->status.data_version;
533 fscache_relinquish_cookie(vnode->cache, &aux,
534 test_bit(AFS_VNODE_DELETED, &vnode->flags));
535 vnode->cache = NULL;
536 }
537#endif
538
539 afs_put_permits(rcu_access_pointer(vnode->permit_cache));
540 _leave("");
541}
542
543/*
544 * set the attributes of an inode
545 */
546int afs_setattr(struct dentry *dentry, struct iattr *attr)
547{
548 struct afs_fs_cursor fc;
549 struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
550 struct key *key;
551 int ret;
552
553 _enter("{%x:%u},{n=%pd},%x",
554 vnode->fid.vid, vnode->fid.vnode, dentry,
555 attr->ia_valid);
556
557 if (!(attr->ia_valid & (ATTR_SIZE | ATTR_MODE | ATTR_UID | ATTR_GID |
558 ATTR_MTIME))) {
559 _leave(" = 0 [unsupported]");
560 return 0;
561 }
562
563 /* flush any dirty data outstanding on a regular file */
564 if (S_ISREG(vnode->vfs_inode.i_mode))
565 filemap_write_and_wait(vnode->vfs_inode.i_mapping);
566
567 if (attr->ia_valid & ATTR_FILE) {
568 key = afs_file_key(attr->ia_file);
569 } else {
570 key = afs_request_key(vnode->volume->cell);
571 if (IS_ERR(key)) {
572 ret = PTR_ERR(key);
573 goto error;
574 }
575 }
576
577 ret = -ERESTARTSYS;
578 if (afs_begin_vnode_operation(&fc, vnode, key)) {
579 while (afs_select_fileserver(&fc)) {
580 fc.cb_break = afs_calc_vnode_cb_break(vnode);
581 afs_fs_setattr(&fc, attr);
582 }
583
584 afs_check_for_remote_deletion(&fc, fc.vnode);
585 afs_vnode_commit_status(&fc, vnode, fc.cb_break);
586 ret = afs_end_vnode_operation(&fc);
587 }
588
589 if (!(attr->ia_valid & ATTR_FILE))
590 key_put(key);
591
592error:
593 _leave(" = %d", ret);
594 return ret;
595}
1/*
2 * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
3 *
4 * This software may be freely redistributed under the terms of the
5 * GNU General Public License.
6 *
7 * You should have received a copy of the GNU General Public License
8 * along with this program; if not, write to the Free Software
9 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
10 *
11 * Authors: David Woodhouse <dwmw2@infradead.org>
12 * David Howells <dhowells@redhat.com>
13 *
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/fs.h>
20#include <linux/pagemap.h>
21#include <linux/sched.h>
22#include <linux/mount.h>
23#include <linux/namei.h>
24#include <linux/iversion.h>
25#include "internal.h"
26#include "afs_fs.h"
27
28static const struct inode_operations afs_symlink_inode_operations = {
29 .get_link = page_get_link,
30};
31
32static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *parent_vnode)
33{
34 static unsigned long once_only;
35
36 pr_warn("kAFS: AFS vnode with undefined type %u\n", vnode->status.type);
37 pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n",
38 vnode->status.abort_code,
39 vnode->status.mode,
40 vnode->status.size,
41 vnode->status.data_version);
42 pr_warn("kAFS: vnode %llx:%llx:%x\n",
43 vnode->fid.vid,
44 vnode->fid.vnode,
45 vnode->fid.unique);
46 if (parent_vnode)
47 pr_warn("kAFS: dir %llx:%llx:%x\n",
48 parent_vnode->fid.vid,
49 parent_vnode->fid.vnode,
50 parent_vnode->fid.unique);
51
52 if (!test_and_set_bit(0, &once_only))
53 dump_stack();
54}
55
56/*
57 * Set parameters for the netfs library
58 */
59static void afs_set_netfs_context(struct afs_vnode *vnode)
60{
61 netfs_inode_init(&vnode->netfs, &afs_req_ops, true);
62}
63
64/*
65 * Initialise an inode from the vnode status.
66 */
67static int afs_inode_init_from_status(struct afs_operation *op,
68 struct afs_vnode_param *vp,
69 struct afs_vnode *vnode)
70{
71 struct afs_file_status *status = &vp->scb.status;
72 struct inode *inode = AFS_VNODE_TO_I(vnode);
73 struct timespec64 t;
74
75 _enter("{%llx:%llu.%u} %s",
76 vp->fid.vid, vp->fid.vnode, vp->fid.unique,
77 op->type ? op->type->name : "???");
78
79 _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
80 status->type,
81 status->nlink,
82 (unsigned long long) status->size,
83 status->data_version,
84 status->mode);
85
86 write_seqlock(&vnode->cb_lock);
87
88 vnode->cb_v_check = op->cb_v_break;
89 vnode->status = *status;
90
91 t = status->mtime_client;
92 inode_set_ctime_to_ts(inode, t);
93 inode_set_mtime_to_ts(inode, t);
94 inode_set_atime_to_ts(inode, t);
95 inode->i_flags |= S_NOATIME;
96 inode->i_uid = make_kuid(&init_user_ns, status->owner);
97 inode->i_gid = make_kgid(&init_user_ns, status->group);
98 set_nlink(&vnode->netfs.inode, status->nlink);
99
100 switch (status->type) {
101 case AFS_FTYPE_FILE:
102 inode->i_mode = S_IFREG | (status->mode & S_IALLUGO);
103 inode->i_op = &afs_file_inode_operations;
104 inode->i_fop = &afs_file_operations;
105 inode->i_mapping->a_ops = &afs_file_aops;
106 mapping_set_large_folios(inode->i_mapping);
107 break;
108 case AFS_FTYPE_DIR:
109 inode->i_mode = S_IFDIR | (status->mode & S_IALLUGO);
110 inode->i_op = &afs_dir_inode_operations;
111 inode->i_fop = &afs_dir_file_operations;
112 inode->i_mapping->a_ops = &afs_dir_aops;
113 mapping_set_large_folios(inode->i_mapping);
114 break;
115 case AFS_FTYPE_SYMLINK:
116 /* Symlinks with a mode of 0644 are actually mountpoints. */
117 if ((status->mode & 0777) == 0644) {
118 inode->i_flags |= S_AUTOMOUNT;
119
120 set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
121
122 inode->i_mode = S_IFDIR | 0555;
123 inode->i_op = &afs_mntpt_inode_operations;
124 inode->i_fop = &afs_mntpt_file_operations;
125 inode->i_mapping->a_ops = &afs_symlink_aops;
126 } else {
127 inode->i_mode = S_IFLNK | status->mode;
128 inode->i_op = &afs_symlink_inode_operations;
129 inode->i_mapping->a_ops = &afs_symlink_aops;
130 }
131 inode_nohighmem(inode);
132 break;
133 default:
134 dump_vnode(vnode, op->file[0].vnode != vnode ? op->file[0].vnode : NULL);
135 write_sequnlock(&vnode->cb_lock);
136 return afs_protocol_error(NULL, afs_eproto_file_type);
137 }
138
139 afs_set_i_size(vnode, status->size);
140 afs_set_netfs_context(vnode);
141
142 vnode->invalid_before = status->data_version;
143 inode_set_iversion_raw(&vnode->netfs.inode, status->data_version);
144
145 if (!vp->scb.have_cb) {
146 /* it's a symlink we just created (the fileserver
147 * didn't give us a callback) */
148 atomic64_set(&vnode->cb_expires_at, AFS_NO_CB_PROMISE);
149 } else {
150 vnode->cb_server = op->server;
151 atomic64_set(&vnode->cb_expires_at, vp->scb.callback.expires_at);
152 }
153
154 write_sequnlock(&vnode->cb_lock);
155 return 0;
156}
157
158/*
159 * Update the core inode struct from a returned status record.
160 */
161static void afs_apply_status(struct afs_operation *op,
162 struct afs_vnode_param *vp)
163{
164 struct afs_file_status *status = &vp->scb.status;
165 struct afs_vnode *vnode = vp->vnode;
166 struct inode *inode = &vnode->netfs.inode;
167 struct timespec64 t;
168 umode_t mode;
169 bool unexpected_jump = false;
170 bool data_changed = false;
171 bool change_size = vp->set_size;
172
173 _enter("{%llx:%llu.%u} %s",
174 vp->fid.vid, vp->fid.vnode, vp->fid.unique,
175 op->type ? op->type->name : "???");
176
177 BUG_ON(test_bit(AFS_VNODE_UNSET, &vnode->flags));
178
179 if (status->type != vnode->status.type) {
180 pr_warn("Vnode %llx:%llx:%x changed type %u to %u\n",
181 vnode->fid.vid,
182 vnode->fid.vnode,
183 vnode->fid.unique,
184 status->type, vnode->status.type);
185 afs_protocol_error(NULL, afs_eproto_bad_status);
186 return;
187 }
188
189 if (status->nlink != vnode->status.nlink)
190 set_nlink(inode, status->nlink);
191
192 if (status->owner != vnode->status.owner)
193 inode->i_uid = make_kuid(&init_user_ns, status->owner);
194
195 if (status->group != vnode->status.group)
196 inode->i_gid = make_kgid(&init_user_ns, status->group);
197
198 if (status->mode != vnode->status.mode) {
199 mode = inode->i_mode;
200 mode &= ~S_IALLUGO;
201 mode |= status->mode & S_IALLUGO;
202 WRITE_ONCE(inode->i_mode, mode);
203 }
204
205 t = status->mtime_client;
206 inode_set_mtime_to_ts(inode, t);
207 if (vp->update_ctime)
208 inode_set_ctime_to_ts(inode, op->ctime);
209
210 if (vnode->status.data_version != status->data_version)
211 data_changed = true;
212
213 vnode->status = *status;
214
215 if (vp->dv_before + vp->dv_delta != status->data_version) {
216 if (vnode->cb_ro_snapshot == atomic_read(&vnode->volume->cb_ro_snapshot) &&
217 atomic64_read(&vnode->cb_expires_at) != AFS_NO_CB_PROMISE)
218 pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx %s (op=%x)\n",
219 vnode->fid.vid, vnode->fid.vnode,
220 (unsigned long long)vp->dv_before + vp->dv_delta,
221 (unsigned long long)status->data_version,
222 op->type ? op->type->name : "???",
223 op->debug_id);
224
225 vnode->invalid_before = status->data_version;
226 if (vnode->status.type == AFS_FTYPE_DIR) {
227 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
228 afs_stat_v(vnode, n_inval);
229 } else {
230 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
231 }
232 change_size = true;
233 data_changed = true;
234 unexpected_jump = true;
235 } else if (vnode->status.type == AFS_FTYPE_DIR) {
236 /* Expected directory change is handled elsewhere so
237 * that we can locally edit the directory and save on a
238 * download.
239 */
240 if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
241 data_changed = false;
242 change_size = true;
243 }
244
245 if (data_changed) {
246 inode_set_iversion_raw(inode, status->data_version);
247
248 /* Only update the size if the data version jumped. If the
249 * file is being modified locally, then we might have our own
250 * idea of what the size should be that's not the same as
251 * what's on the server.
252 */
253 vnode->netfs.remote_i_size = status->size;
254 if (change_size || status->size > i_size_read(inode)) {
255 afs_set_i_size(vnode, status->size);
256 if (unexpected_jump)
257 vnode->netfs.zero_point = status->size;
258 inode_set_ctime_to_ts(inode, t);
259 inode_set_atime_to_ts(inode, t);
260 }
261 }
262}
263
264/*
265 * Apply a callback to a vnode.
266 */
267static void afs_apply_callback(struct afs_operation *op,
268 struct afs_vnode_param *vp)
269{
270 struct afs_callback *cb = &vp->scb.callback;
271 struct afs_vnode *vnode = vp->vnode;
272
273 if (!afs_cb_is_broken(vp->cb_break_before, vnode)) {
274 if (op->volume->type == AFSVL_RWVOL)
275 vnode->cb_server = op->server;
276 atomic64_set(&vnode->cb_expires_at, cb->expires_at);
277 }
278}
279
280/*
281 * Apply the received status and callback to an inode all in the same critical
282 * section to avoid races with afs_validate().
283 */
284void afs_vnode_commit_status(struct afs_operation *op, struct afs_vnode_param *vp)
285{
286 struct afs_vnode *vnode = vp->vnode;
287
288 _enter("");
289
290 write_seqlock(&vnode->cb_lock);
291
292 if (vp->scb.have_error) {
293 /* A YFS server will return this from RemoveFile2 and AFS and
294 * YFS will return this from InlineBulkStatus.
295 */
296 if (vp->scb.status.abort_code == VNOVNODE) {
297 set_bit(AFS_VNODE_DELETED, &vnode->flags);
298 clear_nlink(&vnode->netfs.inode);
299 __afs_break_callback(vnode, afs_cb_break_for_deleted);
300 op->flags &= ~AFS_OPERATION_DIR_CONFLICT;
301 }
302 } else if (vp->scb.have_status) {
303 if (vp->speculative &&
304 (test_bit(AFS_VNODE_MODIFYING, &vnode->flags) ||
305 vp->dv_before != vnode->status.data_version))
306 /* Ignore the result of a speculative bulk status fetch
307 * if it splits around a modification op, thereby
308 * appearing to regress the data version.
309 */
310 goto out;
311 afs_apply_status(op, vp);
312 if (vp->scb.have_cb)
313 afs_apply_callback(op, vp);
314 } else if (vp->op_unlinked && !(op->flags & AFS_OPERATION_DIR_CONFLICT)) {
315 drop_nlink(&vnode->netfs.inode);
316 if (vnode->netfs.inode.i_nlink == 0) {
317 set_bit(AFS_VNODE_DELETED, &vnode->flags);
318 __afs_break_callback(vnode, afs_cb_break_for_deleted);
319 }
320 }
321
322out:
323 write_sequnlock(&vnode->cb_lock);
324
325 if (vp->scb.have_status)
326 afs_cache_permit(vnode, op->key, vp->cb_break_before, &vp->scb);
327}
328
329static void afs_fetch_status_success(struct afs_operation *op)
330{
331 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
332 struct afs_vnode *vnode = vp->vnode;
333 int ret;
334
335 if (vnode->netfs.inode.i_state & I_NEW) {
336 ret = afs_inode_init_from_status(op, vp, vnode);
337 afs_op_set_error(op, ret);
338 if (ret == 0)
339 afs_cache_permit(vnode, op->key, vp->cb_break_before, &vp->scb);
340 } else {
341 afs_vnode_commit_status(op, vp);
342 }
343}
344
345const struct afs_operation_ops afs_fetch_status_operation = {
346 .issue_afs_rpc = afs_fs_fetch_status,
347 .issue_yfs_rpc = yfs_fs_fetch_status,
348 .success = afs_fetch_status_success,
349 .aborted = afs_check_for_remote_deletion,
350};
351
352/*
353 * Fetch file status from the volume.
354 */
355int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool is_new,
356 afs_access_t *_caller_access)
357{
358 struct afs_operation *op;
359
360 _enter("%s,{%llx:%llu.%u,S=%lx}",
361 vnode->volume->name,
362 vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique,
363 vnode->flags);
364
365 op = afs_alloc_operation(key, vnode->volume);
366 if (IS_ERR(op))
367 return PTR_ERR(op);
368
369 afs_op_set_vnode(op, 0, vnode);
370
371 op->nr_files = 1;
372 op->ops = &afs_fetch_status_operation;
373 afs_begin_vnode_operation(op);
374 afs_wait_for_operation(op);
375
376 if (_caller_access)
377 *_caller_access = op->file[0].scb.status.caller_access;
378 return afs_put_operation(op);
379}
380
381/*
382 * ilookup() comparator
383 */
384int afs_ilookup5_test_by_fid(struct inode *inode, void *opaque)
385{
386 struct afs_vnode *vnode = AFS_FS_I(inode);
387 struct afs_fid *fid = opaque;
388
389 return (fid->vnode == vnode->fid.vnode &&
390 fid->vnode_hi == vnode->fid.vnode_hi &&
391 fid->unique == vnode->fid.unique);
392}
393
394/*
395 * iget5() comparator
396 */
397static int afs_iget5_test(struct inode *inode, void *opaque)
398{
399 struct afs_vnode_param *vp = opaque;
400 //struct afs_vnode *vnode = AFS_FS_I(inode);
401
402 return afs_ilookup5_test_by_fid(inode, &vp->fid);
403}
404
405/*
406 * iget5() inode initialiser
407 */
408static int afs_iget5_set(struct inode *inode, void *opaque)
409{
410 struct afs_vnode_param *vp = opaque;
411 struct afs_super_info *as = AFS_FS_S(inode->i_sb);
412 struct afs_vnode *vnode = AFS_FS_I(inode);
413
414 vnode->volume = as->volume;
415 vnode->fid = vp->fid;
416
417 /* YFS supports 96-bit vnode IDs, but Linux only supports
418 * 64-bit inode numbers.
419 */
420 inode->i_ino = vnode->fid.vnode;
421 inode->i_generation = vnode->fid.unique;
422 return 0;
423}
424
425/*
426 * Get a cache cookie for an inode.
427 */
428static void afs_get_inode_cache(struct afs_vnode *vnode)
429{
430#ifdef CONFIG_AFS_FSCACHE
431 struct {
432 __be32 vnode_id;
433 __be32 unique;
434 __be32 vnode_id_ext[2]; /* Allow for a 96-bit key */
435 } __packed key;
436 struct afs_vnode_cache_aux aux;
437
438 if (vnode->status.type != AFS_FTYPE_FILE) {
439 vnode->netfs.cache = NULL;
440 return;
441 }
442
443 key.vnode_id = htonl(vnode->fid.vnode);
444 key.unique = htonl(vnode->fid.unique);
445 key.vnode_id_ext[0] = htonl(vnode->fid.vnode >> 32);
446 key.vnode_id_ext[1] = htonl(vnode->fid.vnode_hi);
447 afs_set_cache_aux(vnode, &aux);
448
449 afs_vnode_set_cache(vnode,
450 fscache_acquire_cookie(
451 vnode->volume->cache,
452 vnode->status.type == AFS_FTYPE_FILE ?
453 0 : FSCACHE_ADV_SINGLE_CHUNK,
454 &key, sizeof(key),
455 &aux, sizeof(aux),
456 i_size_read(&vnode->netfs.inode)));
457#endif
458}
459
460/*
461 * inode retrieval
462 */
463struct inode *afs_iget(struct afs_operation *op, struct afs_vnode_param *vp)
464{
465 struct afs_vnode_param *dvp = &op->file[0];
466 struct super_block *sb = dvp->vnode->netfs.inode.i_sb;
467 struct afs_vnode *vnode;
468 struct inode *inode;
469 int ret;
470
471 _enter(",{%llx:%llu.%u},,", vp->fid.vid, vp->fid.vnode, vp->fid.unique);
472
473 inode = iget5_locked(sb, vp->fid.vnode, afs_iget5_test, afs_iget5_set, vp);
474 if (!inode) {
475 _leave(" = -ENOMEM");
476 return ERR_PTR(-ENOMEM);
477 }
478
479 vnode = AFS_FS_I(inode);
480
481 _debug("GOT INODE %p { vl=%llx vn=%llx, u=%x }",
482 inode, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
483
484 /* deal with an existing inode */
485 if (!(inode->i_state & I_NEW)) {
486 _leave(" = %p", inode);
487 return inode;
488 }
489
490 ret = afs_inode_init_from_status(op, vp, vnode);
491 if (ret < 0)
492 goto bad_inode;
493
494 afs_get_inode_cache(vnode);
495
496 /* success */
497 clear_bit(AFS_VNODE_UNSET, &vnode->flags);
498 unlock_new_inode(inode);
499 _leave(" = %p", inode);
500 return inode;
501
502 /* failure */
503bad_inode:
504 iget_failed(inode);
505 _leave(" = %d [bad]", ret);
506 return ERR_PTR(ret);
507}
508
509static int afs_iget5_set_root(struct inode *inode, void *opaque)
510{
511 struct afs_super_info *as = AFS_FS_S(inode->i_sb);
512 struct afs_vnode *vnode = AFS_FS_I(inode);
513
514 vnode->volume = as->volume;
515 vnode->fid.vid = as->volume->vid;
516 vnode->fid.vnode = 1;
517 vnode->fid.unique = 1;
518 inode->i_ino = 1;
519 inode->i_generation = 1;
520 return 0;
521}
522
523/*
524 * Set up the root inode for a volume. This is always vnode 1, unique 1 within
525 * the volume.
526 */
527struct inode *afs_root_iget(struct super_block *sb, struct key *key)
528{
529 struct afs_super_info *as = AFS_FS_S(sb);
530 struct afs_operation *op;
531 struct afs_vnode *vnode;
532 struct inode *inode;
533 int ret;
534
535 _enter(",{%llx},,", as->volume->vid);
536
537 inode = iget5_locked(sb, 1, NULL, afs_iget5_set_root, NULL);
538 if (!inode) {
539 _leave(" = -ENOMEM");
540 return ERR_PTR(-ENOMEM);
541 }
542
543 _debug("GOT ROOT INODE %p { vl=%llx }", inode, as->volume->vid);
544
545 BUG_ON(!(inode->i_state & I_NEW));
546
547 vnode = AFS_FS_I(inode);
548 vnode->cb_v_check = atomic_read(&as->volume->cb_v_break);
549 afs_set_netfs_context(vnode);
550
551 op = afs_alloc_operation(key, as->volume);
552 if (IS_ERR(op)) {
553 ret = PTR_ERR(op);
554 goto error;
555 }
556
557 afs_op_set_vnode(op, 0, vnode);
558
559 op->nr_files = 1;
560 op->ops = &afs_fetch_status_operation;
561 ret = afs_do_sync_operation(op);
562 if (ret < 0)
563 goto error;
564
565 afs_get_inode_cache(vnode);
566
567 clear_bit(AFS_VNODE_UNSET, &vnode->flags);
568 unlock_new_inode(inode);
569 _leave(" = %p", inode);
570 return inode;
571
572error:
573 iget_failed(inode);
574 _leave(" = %d [bad]", ret);
575 return ERR_PTR(ret);
576}
577
578/*
579 * read the attributes of an inode
580 */
581int afs_getattr(struct mnt_idmap *idmap, const struct path *path,
582 struct kstat *stat, u32 request_mask, unsigned int query_flags)
583{
584 struct inode *inode = d_inode(path->dentry);
585 struct afs_vnode *vnode = AFS_FS_I(inode);
586 struct key *key;
587 int ret, seq;
588
589 _enter("{ ino=%lu v=%u }", inode->i_ino, inode->i_generation);
590
591 if (vnode->volume &&
592 !(query_flags & AT_STATX_DONT_SYNC) &&
593 atomic64_read(&vnode->cb_expires_at) == AFS_NO_CB_PROMISE) {
594 key = afs_request_key(vnode->volume->cell);
595 if (IS_ERR(key))
596 return PTR_ERR(key);
597 ret = afs_validate(vnode, key);
598 key_put(key);
599 if (ret < 0)
600 return ret;
601 }
602
603 do {
604 seq = read_seqbegin(&vnode->cb_lock);
605 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
606 if (test_bit(AFS_VNODE_SILLY_DELETED, &vnode->flags) &&
607 stat->nlink > 0)
608 stat->nlink -= 1;
609
610 /* Lie about the size of directories. We maintain a locally
611 * edited copy and may make different allocation decisions on
612 * it, but we need to give userspace the server's size.
613 */
614 if (S_ISDIR(inode->i_mode))
615 stat->size = vnode->netfs.remote_i_size;
616 } while (read_seqretry(&vnode->cb_lock, seq));
617
618 return 0;
619}
620
621/*
622 * discard an AFS inode
623 */
624int afs_drop_inode(struct inode *inode)
625{
626 _enter("");
627
628 if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags))
629 return generic_delete_inode(inode);
630 else
631 return generic_drop_inode(inode);
632}
633
634/*
635 * clear an AFS inode
636 */
637void afs_evict_inode(struct inode *inode)
638{
639 struct afs_vnode_cache_aux aux;
640 struct afs_vnode *vnode = AFS_FS_I(inode);
641
642 _enter("{%llx:%llu.%d}",
643 vnode->fid.vid,
644 vnode->fid.vnode,
645 vnode->fid.unique);
646
647 _debug("CLEAR INODE %p", inode);
648
649 ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode);
650
651 netfs_wait_for_outstanding_io(inode);
652 truncate_inode_pages_final(&inode->i_data);
653
654 afs_set_cache_aux(vnode, &aux);
655 netfs_clear_inode_writeback(inode, &aux);
656 clear_inode(inode);
657
658 while (!list_empty(&vnode->wb_keys)) {
659 struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next,
660 struct afs_wb_key, vnode_link);
661 list_del(&wbk->vnode_link);
662 afs_put_wb_key(wbk);
663 }
664
665 fscache_relinquish_cookie(afs_vnode_cache(vnode),
666 test_bit(AFS_VNODE_DELETED, &vnode->flags));
667
668 afs_prune_wb_keys(vnode);
669 afs_put_permits(rcu_access_pointer(vnode->permit_cache));
670 key_put(vnode->silly_key);
671 vnode->silly_key = NULL;
672 key_put(vnode->lock_key);
673 vnode->lock_key = NULL;
674 _leave("");
675}
676
677static void afs_setattr_success(struct afs_operation *op)
678{
679 struct afs_vnode_param *vp = &op->file[0];
680 struct inode *inode = &vp->vnode->netfs.inode;
681 loff_t old_i_size = i_size_read(inode);
682
683 op->setattr.old_i_size = old_i_size;
684 afs_vnode_commit_status(op, vp);
685 /* inode->i_size has now been changed. */
686
687 if (op->setattr.attr->ia_valid & ATTR_SIZE) {
688 loff_t size = op->setattr.attr->ia_size;
689 if (size > old_i_size)
690 pagecache_isize_extended(inode, old_i_size, size);
691 }
692}
693
694static void afs_setattr_edit_file(struct afs_operation *op)
695{
696 struct afs_vnode_param *vp = &op->file[0];
697 struct afs_vnode *vnode = vp->vnode;
698 struct inode *inode = &vnode->netfs.inode;
699
700 if (op->setattr.attr->ia_valid & ATTR_SIZE) {
701 loff_t size = op->setattr.attr->ia_size;
702 loff_t old = op->setattr.old_i_size;
703
704 /* Note: inode->i_size was updated by afs_apply_status() inside
705 * the I/O and callback locks.
706 */
707
708 if (size != old) {
709 truncate_pagecache(inode, size);
710 netfs_resize_file(&vnode->netfs, size, true);
711 fscache_resize_cookie(afs_vnode_cache(vnode), size);
712 }
713 }
714}
715
716static const struct afs_operation_ops afs_setattr_operation = {
717 .issue_afs_rpc = afs_fs_setattr,
718 .issue_yfs_rpc = yfs_fs_setattr,
719 .success = afs_setattr_success,
720 .edit_dir = afs_setattr_edit_file,
721};
722
723/*
724 * set the attributes of an inode
725 */
726int afs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
727 struct iattr *attr)
728{
729 const unsigned int supported =
730 ATTR_SIZE | ATTR_MODE | ATTR_UID | ATTR_GID |
731 ATTR_MTIME | ATTR_MTIME_SET | ATTR_TIMES_SET | ATTR_TOUCH;
732 struct afs_operation *op;
733 struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
734 struct inode *inode = &vnode->netfs.inode;
735 loff_t i_size;
736 int ret;
737
738 _enter("{%llx:%llu},{n=%pd},%x",
739 vnode->fid.vid, vnode->fid.vnode, dentry,
740 attr->ia_valid);
741
742 if (!(attr->ia_valid & supported)) {
743 _leave(" = 0 [unsupported]");
744 return 0;
745 }
746
747 i_size = i_size_read(inode);
748 if (attr->ia_valid & ATTR_SIZE) {
749 if (!S_ISREG(inode->i_mode))
750 return -EISDIR;
751
752 ret = inode_newsize_ok(inode, attr->ia_size);
753 if (ret)
754 return ret;
755
756 if (attr->ia_size == i_size)
757 attr->ia_valid &= ~ATTR_SIZE;
758 }
759
760 fscache_use_cookie(afs_vnode_cache(vnode), true);
761
762 /* Prevent any new writebacks from starting whilst we do this. */
763 down_write(&vnode->validate_lock);
764
765 if ((attr->ia_valid & ATTR_SIZE) && S_ISREG(inode->i_mode)) {
766 loff_t size = attr->ia_size;
767
768 /* Wait for any outstanding writes to the server to complete */
769 loff_t from = min(size, i_size);
770 loff_t to = max(size, i_size);
771 ret = filemap_fdatawait_range(inode->i_mapping, from, to);
772 if (ret < 0)
773 goto out_unlock;
774
775 /* Don't talk to the server if we're just shortening in-memory
776 * writes that haven't gone to the server yet.
777 */
778 if (!(attr->ia_valid & (supported & ~ATTR_SIZE & ~ATTR_MTIME)) &&
779 attr->ia_size < i_size &&
780 attr->ia_size > vnode->netfs.remote_i_size) {
781 truncate_setsize(inode, attr->ia_size);
782 netfs_resize_file(&vnode->netfs, size, false);
783 fscache_resize_cookie(afs_vnode_cache(vnode),
784 attr->ia_size);
785 ret = 0;
786 goto out_unlock;
787 }
788 }
789
790 op = afs_alloc_operation(((attr->ia_valid & ATTR_FILE) ?
791 afs_file_key(attr->ia_file) : NULL),
792 vnode->volume);
793 if (IS_ERR(op)) {
794 ret = PTR_ERR(op);
795 goto out_unlock;
796 }
797
798 afs_op_set_vnode(op, 0, vnode);
799 op->setattr.attr = attr;
800
801 if (attr->ia_valid & ATTR_SIZE) {
802 op->file[0].dv_delta = 1;
803 op->file[0].set_size = true;
804 }
805 op->ctime = attr->ia_ctime;
806 op->file[0].update_ctime = 1;
807 op->file[0].modification = true;
808
809 op->ops = &afs_setattr_operation;
810 ret = afs_do_sync_operation(op);
811
812out_unlock:
813 up_write(&vnode->validate_lock);
814 fscache_unuse_cookie(afs_vnode_cache(vnode), NULL, NULL);
815 _leave(" = %d", ret);
816 return ret;
817}