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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / fs / ceph / inode.c
blob7fef94fd1e55fdbabbb77deecd3df5400e4f749c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3
4 #include <linux/module.h>
5 #include <linux/fs.h>
6 #include <linux/slab.h>
7 #include <linux/string.h>
8 #include <linux/uaccess.h>
9 #include <linux/kernel.h>
10 #include <linux/writeback.h>
11 #include <linux/vmalloc.h>
12 #include <linux/xattr.h>
13 #include <linux/posix_acl.h>
14 #include <linux/random.h>
15 #include <linux/sort.h>
16 #include <linux/iversion.h>
17
18 #include "super.h"
19 #include "mds_client.h"
20 #include "cache.h"
21 #include <linux/ceph/decode.h>
22
23 /*
24 * Ceph inode operations
25 *
26 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
27 * setattr, etc.), xattr helpers, and helpers for assimilating
28 * metadata returned by the MDS into our cache.
29 *
30 * Also define helpers for doing asynchronous writeback, invalidation,
31 * and truncation for the benefit of those who can't afford to block
32 * (typically because they are in the message handler path).
33 */
34
35 static const struct inode_operations ceph_symlink_iops;
36
37 static void ceph_inode_work(struct work_struct *work);
38
39 /*
40 * find or create an inode, given the ceph ino number
41 */
42 static int ceph_set_ino_cb(struct inode *inode, void *data)
43 {
44 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
45 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
46 inode_set_iversion_raw(inode, 0);
47 return 0;
48 }
49
50 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
51 {
52 struct inode *inode;
53 ino_t t = ceph_vino_to_ino(vino);
54
55 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
56 if (!inode)
57 return ERR_PTR(-ENOMEM);
58 if (inode->i_state & I_NEW)
59 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
60 inode, ceph_vinop(inode), (u64)inode->i_ino);
61
62 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
63 vino.snap, inode);
64 return inode;
65 }
66
67 /*
68 * get/constuct snapdir inode for a given directory
69 */
70 struct inode *ceph_get_snapdir(struct inode *parent)
71 {
72 struct ceph_vino vino = {
73 .ino = ceph_ino(parent),
74 .snap = CEPH_SNAPDIR,
75 };
76 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
77 struct ceph_inode_info *ci = ceph_inode(inode);
78
79 BUG_ON(!S_ISDIR(parent->i_mode));
80 if (IS_ERR(inode))
81 return inode;
82 inode->i_mode = parent->i_mode;
83 inode->i_uid = parent->i_uid;
84 inode->i_gid = parent->i_gid;
85 inode->i_mtime = parent->i_mtime;
86 inode->i_ctime = parent->i_ctime;
87 inode->i_atime = parent->i_atime;
88 inode->i_op = &ceph_snapdir_iops;
89 inode->i_fop = &ceph_snapdir_fops;
90 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
91 ci->i_rbytes = 0;
92 ci->i_btime = ceph_inode(parent)->i_btime;
93
94 if (inode->i_state & I_NEW)
95 unlock_new_inode(inode);
96
97 return inode;
98 }
99
100 const struct inode_operations ceph_file_iops = {
101 .permission = ceph_permission,
102 .setattr = ceph_setattr,
103 .getattr = ceph_getattr,
104 .listxattr = ceph_listxattr,
105 .get_acl = ceph_get_acl,
106 .set_acl = ceph_set_acl,
107 };
108
109
110 /*
111 * We use a 'frag tree' to keep track of the MDS's directory fragments
112 * for a given inode (usually there is just a single fragment). We
113 * need to know when a child frag is delegated to a new MDS, or when
114 * it is flagged as replicated, so we can direct our requests
115 * accordingly.
116 */
117
118 /*
119 * find/create a frag in the tree
120 */
121 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
122 u32 f)
123 {
124 struct rb_node **p;
125 struct rb_node *parent = NULL;
126 struct ceph_inode_frag *frag;
127 int c;
128
129 p = &ci->i_fragtree.rb_node;
130 while (*p) {
131 parent = *p;
132 frag = rb_entry(parent, struct ceph_inode_frag, node);
133 c = ceph_frag_compare(f, frag->frag);
134 if (c < 0)
135 p = &(*p)->rb_left;
136 else if (c > 0)
137 p = &(*p)->rb_right;
138 else
139 return frag;
140 }
141
142 frag = kmalloc(sizeof(*frag), GFP_NOFS);
143 if (!frag)
144 return ERR_PTR(-ENOMEM);
145
146 frag->frag = f;
147 frag->split_by = 0;
148 frag->mds = -1;
149 frag->ndist = 0;
150
151 rb_link_node(&frag->node, parent, p);
152 rb_insert_color(&frag->node, &ci->i_fragtree);
153
154 dout("get_or_create_frag added %llx.%llx frag %x\n",
155 ceph_vinop(&ci->vfs_inode), f);
156 return frag;
157 }
158
159 /*
160 * find a specific frag @f
161 */
162 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
163 {
164 struct rb_node *n = ci->i_fragtree.rb_node;
165
166 while (n) {
167 struct ceph_inode_frag *frag =
168 rb_entry(n, struct ceph_inode_frag, node);
169 int c = ceph_frag_compare(f, frag->frag);
170 if (c < 0)
171 n = n->rb_left;
172 else if (c > 0)
173 n = n->rb_right;
174 else
175 return frag;
176 }
177 return NULL;
178 }
179
180 /*
181 * Choose frag containing the given value @v. If @pfrag is
182 * specified, copy the frag delegation info to the caller if
183 * it is present.
184 */
185 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
186 struct ceph_inode_frag *pfrag, int *found)
187 {
188 u32 t = ceph_frag_make(0, 0);
189 struct ceph_inode_frag *frag;
190 unsigned nway, i;
191 u32 n;
192
193 if (found)
194 *found = 0;
195
196 while (1) {
197 WARN_ON(!ceph_frag_contains_value(t, v));
198 frag = __ceph_find_frag(ci, t);
199 if (!frag)
200 break; /* t is a leaf */
201 if (frag->split_by == 0) {
202 if (pfrag)
203 memcpy(pfrag, frag, sizeof(*pfrag));
204 if (found)
205 *found = 1;
206 break;
207 }
208
209 /* choose child */
210 nway = 1 << frag->split_by;
211 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
212 frag->split_by, nway);
213 for (i = 0; i < nway; i++) {
214 n = ceph_frag_make_child(t, frag->split_by, i);
215 if (ceph_frag_contains_value(n, v)) {
216 t = n;
217 break;
218 }
219 }
220 BUG_ON(i == nway);
221 }
222 dout("choose_frag(%x) = %x\n", v, t);
223
224 return t;
225 }
226
227 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
228 struct ceph_inode_frag *pfrag, int *found)
229 {
230 u32 ret;
231 mutex_lock(&ci->i_fragtree_mutex);
232 ret = __ceph_choose_frag(ci, v, pfrag, found);
233 mutex_unlock(&ci->i_fragtree_mutex);
234 return ret;
235 }
236
237 /*
238 * Process dirfrag (delegation) info from the mds. Include leaf
239 * fragment in tree ONLY if ndist > 0. Otherwise, only
240 * branches/splits are included in i_fragtree)
241 */
242 static int ceph_fill_dirfrag(struct inode *inode,
243 struct ceph_mds_reply_dirfrag *dirinfo)
244 {
245 struct ceph_inode_info *ci = ceph_inode(inode);
246 struct ceph_inode_frag *frag;
247 u32 id = le32_to_cpu(dirinfo->frag);
248 int mds = le32_to_cpu(dirinfo->auth);
249 int ndist = le32_to_cpu(dirinfo->ndist);
250 int diri_auth = -1;
251 int i;
252 int err = 0;
253
254 spin_lock(&ci->i_ceph_lock);
255 if (ci->i_auth_cap)
256 diri_auth = ci->i_auth_cap->mds;
257 spin_unlock(&ci->i_ceph_lock);
258
259 if (mds == -1) /* CDIR_AUTH_PARENT */
260 mds = diri_auth;
261
262 mutex_lock(&ci->i_fragtree_mutex);
263 if (ndist == 0 && mds == diri_auth) {
264 /* no delegation info needed. */
265 frag = __ceph_find_frag(ci, id);
266 if (!frag)
267 goto out;
268 if (frag->split_by == 0) {
269 /* tree leaf, remove */
270 dout("fill_dirfrag removed %llx.%llx frag %x"
271 " (no ref)\n", ceph_vinop(inode), id);
272 rb_erase(&frag->node, &ci->i_fragtree);
273 kfree(frag);
274 } else {
275 /* tree branch, keep and clear */
276 dout("fill_dirfrag cleared %llx.%llx frag %x"
277 " referral\n", ceph_vinop(inode), id);
278 frag->mds = -1;
279 frag->ndist = 0;
280 }
281 goto out;
282 }
283
284
285 /* find/add this frag to store mds delegation info */
286 frag = __get_or_create_frag(ci, id);
287 if (IS_ERR(frag)) {
288 /* this is not the end of the world; we can continue
289 with bad/inaccurate delegation info */
290 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
291 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
292 err = -ENOMEM;
293 goto out;
294 }
295
296 frag->mds = mds;
297 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
298 for (i = 0; i < frag->ndist; i++)
299 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
300 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
301 ceph_vinop(inode), frag->frag, frag->ndist);
302
303 out:
304 mutex_unlock(&ci->i_fragtree_mutex);
305 return err;
306 }
307
308 static int frag_tree_split_cmp(const void *l, const void *r)
309 {
310 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
311 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
312 return ceph_frag_compare(le32_to_cpu(ls->frag),
313 le32_to_cpu(rs->frag));
314 }
315
316 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
317 {
318 if (!frag)
319 return f == ceph_frag_make(0, 0);
320 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
321 return false;
322 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
323 }
324
325 static int ceph_fill_fragtree(struct inode *inode,
326 struct ceph_frag_tree_head *fragtree,
327 struct ceph_mds_reply_dirfrag *dirinfo)
328 {
329 struct ceph_inode_info *ci = ceph_inode(inode);
330 struct ceph_inode_frag *frag, *prev_frag = NULL;
331 struct rb_node *rb_node;
332 unsigned i, split_by, nsplits;
333 u32 id;
334 bool update = false;
335
336 mutex_lock(&ci->i_fragtree_mutex);
337 nsplits = le32_to_cpu(fragtree->nsplits);
338 if (nsplits != ci->i_fragtree_nsplits) {
339 update = true;
340 } else if (nsplits) {
341 i = prandom_u32() % nsplits;
342 id = le32_to_cpu(fragtree->splits[i].frag);
343 if (!__ceph_find_frag(ci, id))
344 update = true;
345 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
346 rb_node = rb_first(&ci->i_fragtree);
347 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
348 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
349 update = true;
350 }
351 if (!update && dirinfo) {
352 id = le32_to_cpu(dirinfo->frag);
353 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
354 update = true;
355 }
356 if (!update)
357 goto out_unlock;
358
359 if (nsplits > 1) {
360 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
361 frag_tree_split_cmp, NULL);
362 }
363
364 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
365 rb_node = rb_first(&ci->i_fragtree);
366 for (i = 0; i < nsplits; i++) {
367 id = le32_to_cpu(fragtree->splits[i].frag);
368 split_by = le32_to_cpu(fragtree->splits[i].by);
369 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
370 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
371 "frag %x split by %d\n", ceph_vinop(inode),
372 i, nsplits, id, split_by);
373 continue;
374 }
375 frag = NULL;
376 while (rb_node) {
377 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
378 if (ceph_frag_compare(frag->frag, id) >= 0) {
379 if (frag->frag != id)
380 frag = NULL;
381 else
382 rb_node = rb_next(rb_node);
383 break;
384 }
385 rb_node = rb_next(rb_node);
386 /* delete stale split/leaf node */
387 if (frag->split_by > 0 ||
388 !is_frag_child(frag->frag, prev_frag)) {
389 rb_erase(&frag->node, &ci->i_fragtree);
390 if (frag->split_by > 0)
391 ci->i_fragtree_nsplits--;
392 kfree(frag);
393 }
394 frag = NULL;
395 }
396 if (!frag) {
397 frag = __get_or_create_frag(ci, id);
398 if (IS_ERR(frag))
399 continue;
400 }
401 if (frag->split_by == 0)
402 ci->i_fragtree_nsplits++;
403 frag->split_by = split_by;
404 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
405 prev_frag = frag;
406 }
407 while (rb_node) {
408 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
409 rb_node = rb_next(rb_node);
410 /* delete stale split/leaf node */
411 if (frag->split_by > 0 ||
412 !is_frag_child(frag->frag, prev_frag)) {
413 rb_erase(&frag->node, &ci->i_fragtree);
414 if (frag->split_by > 0)
415 ci->i_fragtree_nsplits--;
416 kfree(frag);
417 }
418 }
419 out_unlock:
420 mutex_unlock(&ci->i_fragtree_mutex);
421 return 0;
422 }
423
424 /*
425 * initialize a newly allocated inode.
426 */
427 struct inode *ceph_alloc_inode(struct super_block *sb)
428 {
429 struct ceph_inode_info *ci;
430 int i;
431
432 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
433 if (!ci)
434 return NULL;
435
436 dout("alloc_inode %p\n", &ci->vfs_inode);
437
438 spin_lock_init(&ci->i_ceph_lock);
439
440 ci->i_version = 0;
441 ci->i_inline_version = 0;
442 ci->i_time_warp_seq = 0;
443 ci->i_ceph_flags = 0;
444 atomic64_set(&ci->i_ordered_count, 1);
445 atomic64_set(&ci->i_release_count, 1);
446 atomic64_set(&ci->i_complete_seq[0], 0);
447 atomic64_set(&ci->i_complete_seq[1], 0);
448 ci->i_symlink = NULL;
449
450 ci->i_max_bytes = 0;
451 ci->i_max_files = 0;
452
453 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
454 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout));
455 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
456
457 ci->i_fragtree = RB_ROOT;
458 mutex_init(&ci->i_fragtree_mutex);
459
460 ci->i_xattrs.blob = NULL;
461 ci->i_xattrs.prealloc_blob = NULL;
462 ci->i_xattrs.dirty = false;
463 ci->i_xattrs.index = RB_ROOT;
464 ci->i_xattrs.count = 0;
465 ci->i_xattrs.names_size = 0;
466 ci->i_xattrs.vals_size = 0;
467 ci->i_xattrs.version = 0;
468 ci->i_xattrs.index_version = 0;
469
470 ci->i_caps = RB_ROOT;
471 ci->i_auth_cap = NULL;
472 ci->i_dirty_caps = 0;
473 ci->i_flushing_caps = 0;
474 INIT_LIST_HEAD(&ci->i_dirty_item);
475 INIT_LIST_HEAD(&ci->i_flushing_item);
476 ci->i_prealloc_cap_flush = NULL;
477 INIT_LIST_HEAD(&ci->i_cap_flush_list);
478 init_waitqueue_head(&ci->i_cap_wq);
479 ci->i_hold_caps_max = 0;
480 INIT_LIST_HEAD(&ci->i_cap_delay_list);
481 INIT_LIST_HEAD(&ci->i_cap_snaps);
482 ci->i_head_snapc = NULL;
483 ci->i_snap_caps = 0;
484
485 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ;
486 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
487 ci->i_nr_by_mode[i] = 0;
488
489 mutex_init(&ci->i_truncate_mutex);
490 ci->i_truncate_seq = 0;
491 ci->i_truncate_size = 0;
492 ci->i_truncate_pending = 0;
493
494 ci->i_max_size = 0;
495 ci->i_reported_size = 0;
496 ci->i_wanted_max_size = 0;
497 ci->i_requested_max_size = 0;
498
499 ci->i_pin_ref = 0;
500 ci->i_rd_ref = 0;
501 ci->i_rdcache_ref = 0;
502 ci->i_wr_ref = 0;
503 ci->i_wb_ref = 0;
504 ci->i_fx_ref = 0;
505 ci->i_wrbuffer_ref = 0;
506 ci->i_wrbuffer_ref_head = 0;
507 atomic_set(&ci->i_filelock_ref, 0);
508 atomic_set(&ci->i_shared_gen, 1);
509 ci->i_rdcache_gen = 0;
510 ci->i_rdcache_revoking = 0;
511
512 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
513 INIT_LIST_HEAD(&ci->i_unsafe_iops);
514 spin_lock_init(&ci->i_unsafe_lock);
515
516 ci->i_snap_realm = NULL;
517 INIT_LIST_HEAD(&ci->i_snap_realm_item);
518 INIT_LIST_HEAD(&ci->i_snap_flush_item);
519
520 INIT_WORK(&ci->i_work, ceph_inode_work);
521 ci->i_work_mask = 0;
522 memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
523
524 ceph_fscache_inode_init(ci);
525
526 ci->i_meta_err = 0;
527
528 return &ci->vfs_inode;
529 }
530
531 void ceph_free_inode(struct inode *inode)
532 {
533 struct ceph_inode_info *ci = ceph_inode(inode);
534
535 kfree(ci->i_symlink);
536 kmem_cache_free(ceph_inode_cachep, ci);
537 }
538
539 void ceph_evict_inode(struct inode *inode)
540 {
541 struct ceph_inode_info *ci = ceph_inode(inode);
542 struct ceph_inode_frag *frag;
543 struct rb_node *n;
544
545 dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
546
547 truncate_inode_pages_final(&inode->i_data);
548 clear_inode(inode);
549
550 ceph_fscache_unregister_inode_cookie(ci);
551
552 __ceph_remove_caps(ci);
553
554 if (__ceph_has_any_quota(ci))
555 ceph_adjust_quota_realms_count(inode, false);
556
557 /*
558 * we may still have a snap_realm reference if there are stray
559 * caps in i_snap_caps.
560 */
561 if (ci->i_snap_realm) {
562 struct ceph_mds_client *mdsc =
563 ceph_inode_to_client(inode)->mdsc;
564 if (ceph_snap(inode) == CEPH_NOSNAP) {
565 struct ceph_snap_realm *realm = ci->i_snap_realm;
566 dout(" dropping residual ref to snap realm %p\n",
567 realm);
568 spin_lock(&realm->inodes_with_caps_lock);
569 list_del_init(&ci->i_snap_realm_item);
570 ci->i_snap_realm = NULL;
571 if (realm->ino == ci->i_vino.ino)
572 realm->inode = NULL;
573 spin_unlock(&realm->inodes_with_caps_lock);
574 ceph_put_snap_realm(mdsc, realm);
575 } else {
576 ceph_put_snapid_map(mdsc, ci->i_snapid_map);
577 ci->i_snap_realm = NULL;
578 }
579 }
580
581 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
582 frag = rb_entry(n, struct ceph_inode_frag, node);
583 rb_erase(n, &ci->i_fragtree);
584 kfree(frag);
585 }
586 ci->i_fragtree_nsplits = 0;
587
588 __ceph_destroy_xattrs(ci);
589 if (ci->i_xattrs.blob)
590 ceph_buffer_put(ci->i_xattrs.blob);
591 if (ci->i_xattrs.prealloc_blob)
592 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
593
594 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
595 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns));
596 }
597
598 static inline blkcnt_t calc_inode_blocks(u64 size)
599 {
600 return (size + (1<<9) - 1) >> 9;
601 }
602
603 /*
604 * Helpers to fill in size, ctime, mtime, and atime. We have to be
605 * careful because either the client or MDS may have more up to date
606 * info, depending on which capabilities are held, and whether
607 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
608 * and size are monotonically increasing, except when utimes() or
609 * truncate() increments the corresponding _seq values.)
610 */
611 int ceph_fill_file_size(struct inode *inode, int issued,
612 u32 truncate_seq, u64 truncate_size, u64 size)
613 {
614 struct ceph_inode_info *ci = ceph_inode(inode);
615 int queue_trunc = 0;
616
617 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
618 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
619 dout("size %lld -> %llu\n", inode->i_size, size);
620 if (size > 0 && S_ISDIR(inode->i_mode)) {
621 pr_err("fill_file_size non-zero size for directory\n");
622 size = 0;
623 }
624 i_size_write(inode, size);
625 inode->i_blocks = calc_inode_blocks(size);
626 ci->i_reported_size = size;
627 if (truncate_seq != ci->i_truncate_seq) {
628 dout("truncate_seq %u -> %u\n",
629 ci->i_truncate_seq, truncate_seq);
630 ci->i_truncate_seq = truncate_seq;
631
632 /* the MDS should have revoked these caps */
633 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
634 CEPH_CAP_FILE_RD |
635 CEPH_CAP_FILE_WR |
636 CEPH_CAP_FILE_LAZYIO));
637 /*
638 * If we hold relevant caps, or in the case where we're
639 * not the only client referencing this file and we
640 * don't hold those caps, then we need to check whether
641 * the file is either opened or mmaped
642 */
643 if ((issued & (CEPH_CAP_FILE_CACHE|
644 CEPH_CAP_FILE_BUFFER)) ||
645 mapping_mapped(inode->i_mapping) ||
646 __ceph_is_file_opened(ci)) {
647 ci->i_truncate_pending++;
648 queue_trunc = 1;
649 }
650 }
651 }
652 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
653 ci->i_truncate_size != truncate_size) {
654 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
655 truncate_size);
656 ci->i_truncate_size = truncate_size;
657 }
658
659 if (queue_trunc)
660 ceph_fscache_invalidate(inode);
661
662 return queue_trunc;
663 }
664
665 void ceph_fill_file_time(struct inode *inode, int issued,
666 u64 time_warp_seq, struct timespec64 *ctime,
667 struct timespec64 *mtime, struct timespec64 *atime)
668 {
669 struct ceph_inode_info *ci = ceph_inode(inode);
670 int warn = 0;
671
672 if (issued & (CEPH_CAP_FILE_EXCL|
673 CEPH_CAP_FILE_WR|
674 CEPH_CAP_FILE_BUFFER|
675 CEPH_CAP_AUTH_EXCL|
676 CEPH_CAP_XATTR_EXCL)) {
677 if (ci->i_version == 0 ||
678 timespec64_compare(ctime, &inode->i_ctime) > 0) {
679 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
680 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
681 ctime->tv_sec, ctime->tv_nsec);
682 inode->i_ctime = *ctime;
683 }
684 if (ci->i_version == 0 ||
685 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
686 /* the MDS did a utimes() */
687 dout("mtime %lld.%09ld -> %lld.%09ld "
688 "tw %d -> %d\n",
689 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
690 mtime->tv_sec, mtime->tv_nsec,
691 ci->i_time_warp_seq, (int)time_warp_seq);
692
693 inode->i_mtime = *mtime;
694 inode->i_atime = *atime;
695 ci->i_time_warp_seq = time_warp_seq;
696 } else if (time_warp_seq == ci->i_time_warp_seq) {
697 /* nobody did utimes(); take the max */
698 if (timespec64_compare(mtime, &inode->i_mtime) > 0) {
699 dout("mtime %lld.%09ld -> %lld.%09ld inc\n",
700 inode->i_mtime.tv_sec,
701 inode->i_mtime.tv_nsec,
702 mtime->tv_sec, mtime->tv_nsec);
703 inode->i_mtime = *mtime;
704 }
705 if (timespec64_compare(atime, &inode->i_atime) > 0) {
706 dout("atime %lld.%09ld -> %lld.%09ld inc\n",
707 inode->i_atime.tv_sec,
708 inode->i_atime.tv_nsec,
709 atime->tv_sec, atime->tv_nsec);
710 inode->i_atime = *atime;
711 }
712 } else if (issued & CEPH_CAP_FILE_EXCL) {
713 /* we did a utimes(); ignore mds values */
714 } else {
715 warn = 1;
716 }
717 } else {
718 /* we have no write|excl caps; whatever the MDS says is true */
719 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
720 inode->i_ctime = *ctime;
721 inode->i_mtime = *mtime;
722 inode->i_atime = *atime;
723 ci->i_time_warp_seq = time_warp_seq;
724 } else {
725 warn = 1;
726 }
727 }
728 if (warn) /* time_warp_seq shouldn't go backwards */
729 dout("%p mds time_warp_seq %llu < %u\n",
730 inode, time_warp_seq, ci->i_time_warp_seq);
731 }
732
733 /*
734 * Populate an inode based on info from mds. May be called on new or
735 * existing inodes.
736 */
737 int ceph_fill_inode(struct inode *inode, struct page *locked_page,
738 struct ceph_mds_reply_info_in *iinfo,
739 struct ceph_mds_reply_dirfrag *dirinfo,
740 struct ceph_mds_session *session, int cap_fmode,
741 struct ceph_cap_reservation *caps_reservation)
742 {
743 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
744 struct ceph_mds_reply_inode *info = iinfo->in;
745 struct ceph_inode_info *ci = ceph_inode(inode);
746 int issued, new_issued, info_caps;
747 struct timespec64 mtime, atime, ctime;
748 struct ceph_buffer *xattr_blob = NULL;
749 struct ceph_buffer *old_blob = NULL;
750 struct ceph_string *pool_ns = NULL;
751 struct ceph_cap *new_cap = NULL;
752 int err = 0;
753 bool wake = false;
754 bool queue_trunc = false;
755 bool new_version = false;
756 bool fill_inline = false;
757
758 dout("%s %p ino %llx.%llx v %llu had %llu\n", __func__,
759 inode, ceph_vinop(inode), le64_to_cpu(info->version),
760 ci->i_version);
761
762 info_caps = le32_to_cpu(info->cap.caps);
763
764 /* prealloc new cap struct */
765 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) {
766 new_cap = ceph_get_cap(mdsc, caps_reservation);
767 if (!new_cap)
768 return -ENOMEM;
769 }
770
771 /*
772 * prealloc xattr data, if it looks like we'll need it. only
773 * if len > 4 (meaning there are actually xattrs; the first 4
774 * bytes are the xattr count).
775 */
776 if (iinfo->xattr_len > 4) {
777 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
778 if (!xattr_blob)
779 pr_err("%s ENOMEM xattr blob %d bytes\n", __func__,
780 iinfo->xattr_len);
781 }
782
783 if (iinfo->pool_ns_len > 0)
784 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
785 iinfo->pool_ns_len);
786
787 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map)
788 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode));
789
790 spin_lock(&ci->i_ceph_lock);
791
792 /*
793 * provided version will be odd if inode value is projected,
794 * even if stable. skip the update if we have newer stable
795 * info (ours>=theirs, e.g. due to racing mds replies), unless
796 * we are getting projected (unstable) info (in which case the
797 * version is odd, and we want ours>theirs).
798 * us them
799 * 2 2 skip
800 * 3 2 skip
801 * 3 3 update
802 */
803 if (ci->i_version == 0 ||
804 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
805 le64_to_cpu(info->version) > (ci->i_version & ~1)))
806 new_version = true;
807
808 /* Update change_attribute */
809 inode_set_max_iversion_raw(inode, iinfo->change_attr);
810
811 __ceph_caps_issued(ci, &issued);
812 issued |= __ceph_caps_dirty(ci);
813 new_issued = ~issued & info_caps;
814
815 /* update inode */
816 inode->i_rdev = le32_to_cpu(info->rdev);
817 /* directories have fl_stripe_unit set to zero */
818 if (le32_to_cpu(info->layout.fl_stripe_unit))
819 inode->i_blkbits =
820 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
821 else
822 inode->i_blkbits = CEPH_BLOCK_SHIFT;
823
824 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
825
826 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
827 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
828 inode->i_mode = le32_to_cpu(info->mode);
829 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
830 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
831 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
832 from_kuid(&init_user_ns, inode->i_uid),
833 from_kgid(&init_user_ns, inode->i_gid));
834 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
835 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
836 }
837
838 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
839 (issued & CEPH_CAP_LINK_EXCL) == 0)
840 set_nlink(inode, le32_to_cpu(info->nlink));
841
842 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
843 /* be careful with mtime, atime, size */
844 ceph_decode_timespec64(&atime, &info->atime);
845 ceph_decode_timespec64(&mtime, &info->mtime);
846 ceph_decode_timespec64(&ctime, &info->ctime);
847 ceph_fill_file_time(inode, issued,
848 le32_to_cpu(info->time_warp_seq),
849 &ctime, &mtime, &atime);
850 }
851
852 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) {
853 ci->i_files = le64_to_cpu(info->files);
854 ci->i_subdirs = le64_to_cpu(info->subdirs);
855 }
856
857 if (new_version ||
858 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
859 s64 old_pool = ci->i_layout.pool_id;
860 struct ceph_string *old_ns;
861
862 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
863 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
864 lockdep_is_held(&ci->i_ceph_lock));
865 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
866
867 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
868 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
869
870 pool_ns = old_ns;
871
872 queue_trunc = ceph_fill_file_size(inode, issued,
873 le32_to_cpu(info->truncate_seq),
874 le64_to_cpu(info->truncate_size),
875 le64_to_cpu(info->size));
876 /* only update max_size on auth cap */
877 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
878 ci->i_max_size != le64_to_cpu(info->max_size)) {
879 dout("max_size %lld -> %llu\n", ci->i_max_size,
880 le64_to_cpu(info->max_size));
881 ci->i_max_size = le64_to_cpu(info->max_size);
882 }
883 }
884
885 /* layout and rstat are not tracked by capability, update them if
886 * the inode info is from auth mds */
887 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) {
888 if (S_ISDIR(inode->i_mode)) {
889 ci->i_dir_layout = iinfo->dir_layout;
890 ci->i_rbytes = le64_to_cpu(info->rbytes);
891 ci->i_rfiles = le64_to_cpu(info->rfiles);
892 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
893 ci->i_dir_pin = iinfo->dir_pin;
894 ceph_decode_timespec64(&ci->i_rctime, &info->rctime);
895 }
896 }
897
898 /* xattrs */
899 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
900 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
901 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
902 if (ci->i_xattrs.blob)
903 old_blob = ci->i_xattrs.blob;
904 ci->i_xattrs.blob = xattr_blob;
905 if (xattr_blob)
906 memcpy(ci->i_xattrs.blob->vec.iov_base,
907 iinfo->xattr_data, iinfo->xattr_len);
908 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
909 ceph_forget_all_cached_acls(inode);
910 ceph_security_invalidate_secctx(inode);
911 xattr_blob = NULL;
912 }
913
914 /* finally update i_version */
915 if (le64_to_cpu(info->version) > ci->i_version)
916 ci->i_version = le64_to_cpu(info->version);
917
918 inode->i_mapping->a_ops = &ceph_aops;
919
920 switch (inode->i_mode & S_IFMT) {
921 case S_IFIFO:
922 case S_IFBLK:
923 case S_IFCHR:
924 case S_IFSOCK:
925 inode->i_blkbits = PAGE_SHIFT;
926 init_special_inode(inode, inode->i_mode, inode->i_rdev);
927 inode->i_op = &ceph_file_iops;
928 break;
929 case S_IFREG:
930 inode->i_op = &ceph_file_iops;
931 inode->i_fop = &ceph_file_fops;
932 break;
933 case S_IFLNK:
934 inode->i_op = &ceph_symlink_iops;
935 if (!ci->i_symlink) {
936 u32 symlen = iinfo->symlink_len;
937 char *sym;
938
939 spin_unlock(&ci->i_ceph_lock);
940
941 if (symlen != i_size_read(inode)) {
942 pr_err("%s %llx.%llx BAD symlink "
943 "size %lld\n", __func__,
944 ceph_vinop(inode),
945 i_size_read(inode));
946 i_size_write(inode, symlen);
947 inode->i_blocks = calc_inode_blocks(symlen);
948 }
949
950 err = -ENOMEM;
951 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
952 if (!sym)
953 goto out;
954
955 spin_lock(&ci->i_ceph_lock);
956 if (!ci->i_symlink)
957 ci->i_symlink = sym;
958 else
959 kfree(sym); /* lost a race */
960 }
961 inode->i_link = ci->i_symlink;
962 break;
963 case S_IFDIR:
964 inode->i_op = &ceph_dir_iops;
965 inode->i_fop = &ceph_dir_fops;
966 break;
967 default:
968 pr_err("%s %llx.%llx BAD mode 0%o\n", __func__,
969 ceph_vinop(inode), inode->i_mode);
970 }
971
972 /* were we issued a capability? */
973 if (info_caps) {
974 if (ceph_snap(inode) == CEPH_NOSNAP) {
975 ceph_add_cap(inode, session,
976 le64_to_cpu(info->cap.cap_id),
977 info_caps,
978 le32_to_cpu(info->cap.wanted),
979 le32_to_cpu(info->cap.seq),
980 le32_to_cpu(info->cap.mseq),
981 le64_to_cpu(info->cap.realm),
982 info->cap.flags, &new_cap);
983
984 /* set dir completion flag? */
985 if (S_ISDIR(inode->i_mode) &&
986 ci->i_files == 0 && ci->i_subdirs == 0 &&
987 (info_caps & CEPH_CAP_FILE_SHARED) &&
988 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
989 !__ceph_dir_is_complete(ci)) {
990 dout(" marking %p complete (empty)\n", inode);
991 i_size_write(inode, 0);
992 __ceph_dir_set_complete(ci,
993 atomic64_read(&ci->i_release_count),
994 atomic64_read(&ci->i_ordered_count));
995 }
996
997 wake = true;
998 } else {
999 dout(" %p got snap_caps %s\n", inode,
1000 ceph_cap_string(info_caps));
1001 ci->i_snap_caps |= info_caps;
1002 }
1003 }
1004
1005 if (iinfo->inline_version > 0 &&
1006 iinfo->inline_version >= ci->i_inline_version) {
1007 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1008 ci->i_inline_version = iinfo->inline_version;
1009 if (ci->i_inline_version != CEPH_INLINE_NONE &&
1010 (locked_page || (info_caps & cache_caps)))
1011 fill_inline = true;
1012 }
1013
1014 if (cap_fmode >= 0) {
1015 if (!info_caps)
1016 pr_warn("mds issued no caps on %llx.%llx\n",
1017 ceph_vinop(inode));
1018 __ceph_touch_fmode(ci, mdsc, cap_fmode);
1019 }
1020
1021 spin_unlock(&ci->i_ceph_lock);
1022
1023 if (fill_inline)
1024 ceph_fill_inline_data(inode, locked_page,
1025 iinfo->inline_data, iinfo->inline_len);
1026
1027 if (wake)
1028 wake_up_all(&ci->i_cap_wq);
1029
1030 /* queue truncate if we saw i_size decrease */
1031 if (queue_trunc)
1032 ceph_queue_vmtruncate(inode);
1033
1034 /* populate frag tree */
1035 if (S_ISDIR(inode->i_mode))
1036 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
1037
1038 /* update delegation info? */
1039 if (dirinfo)
1040 ceph_fill_dirfrag(inode, dirinfo);
1041
1042 err = 0;
1043 out:
1044 if (new_cap)
1045 ceph_put_cap(mdsc, new_cap);
1046 ceph_buffer_put(old_blob);
1047 ceph_buffer_put(xattr_blob);
1048 ceph_put_string(pool_ns);
1049 return err;
1050 }
1051
1052 /*
1053 * caller should hold session s_mutex and dentry->d_lock.
1054 */
1055 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry,
1056 struct ceph_mds_reply_lease *lease,
1057 struct ceph_mds_session *session,
1058 unsigned long from_time,
1059 struct ceph_mds_session **old_lease_session)
1060 {
1061 struct ceph_dentry_info *di = ceph_dentry(dentry);
1062 unsigned mask = le16_to_cpu(lease->mask);
1063 long unsigned duration = le32_to_cpu(lease->duration_ms);
1064 long unsigned ttl = from_time + (duration * HZ) / 1000;
1065 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
1066
1067 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1068 dentry, duration, ttl);
1069
1070 /* only track leases on regular dentries */
1071 if (ceph_snap(dir) != CEPH_NOSNAP)
1072 return;
1073
1074 if (mask & CEPH_LEASE_PRIMARY_LINK)
1075 di->flags |= CEPH_DENTRY_PRIMARY_LINK;
1076 else
1077 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK;
1078
1079 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
1080 if (!(mask & CEPH_LEASE_VALID)) {
1081 __ceph_dentry_dir_lease_touch(di);
1082 return;
1083 }
1084
1085 if (di->lease_gen == session->s_cap_gen &&
1086 time_before(ttl, di->time))
1087 return; /* we already have a newer lease. */
1088
1089 if (di->lease_session && di->lease_session != session) {
1090 *old_lease_session = di->lease_session;
1091 di->lease_session = NULL;
1092 }
1093
1094 if (!di->lease_session)
1095 di->lease_session = ceph_get_mds_session(session);
1096 di->lease_gen = session->s_cap_gen;
1097 di->lease_seq = le32_to_cpu(lease->seq);
1098 di->lease_renew_after = half_ttl;
1099 di->lease_renew_from = 0;
1100 di->time = ttl;
1101
1102 __ceph_dentry_lease_touch(di);
1103 }
1104
1105 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry,
1106 struct ceph_mds_reply_lease *lease,
1107 struct ceph_mds_session *session,
1108 unsigned long from_time)
1109 {
1110 struct ceph_mds_session *old_lease_session = NULL;
1111 spin_lock(&dentry->d_lock);
1112 __update_dentry_lease(dir, dentry, lease, session, from_time,
1113 &old_lease_session);
1114 spin_unlock(&dentry->d_lock);
1115 if (old_lease_session)
1116 ceph_put_mds_session(old_lease_session);
1117 }
1118
1119 /*
1120 * update dentry lease without having parent inode locked
1121 */
1122 static void update_dentry_lease_careful(struct dentry *dentry,
1123 struct ceph_mds_reply_lease *lease,
1124 struct ceph_mds_session *session,
1125 unsigned long from_time,
1126 char *dname, u32 dname_len,
1127 struct ceph_vino *pdvino,
1128 struct ceph_vino *ptvino)
1129
1130 {
1131 struct inode *dir;
1132 struct ceph_mds_session *old_lease_session = NULL;
1133
1134 spin_lock(&dentry->d_lock);
1135 /* make sure dentry's name matches target */
1136 if (dentry->d_name.len != dname_len ||
1137 memcmp(dentry->d_name.name, dname, dname_len))
1138 goto out_unlock;
1139
1140 dir = d_inode(dentry->d_parent);
1141 /* make sure parent matches dvino */
1142 if (!ceph_ino_compare(dir, pdvino))
1143 goto out_unlock;
1144
1145 /* make sure dentry's inode matches target. NULL ptvino means that
1146 * we expect a negative dentry */
1147 if (ptvino) {
1148 if (d_really_is_negative(dentry))
1149 goto out_unlock;
1150 if (!ceph_ino_compare(d_inode(dentry), ptvino))
1151 goto out_unlock;
1152 } else {
1153 if (d_really_is_positive(dentry))
1154 goto out_unlock;
1155 }
1156
1157 __update_dentry_lease(dir, dentry, lease, session,
1158 from_time, &old_lease_session);
1159 out_unlock:
1160 spin_unlock(&dentry->d_lock);
1161 if (old_lease_session)
1162 ceph_put_mds_session(old_lease_session);
1163 }
1164
1165 /*
1166 * splice a dentry to an inode.
1167 * caller must hold directory i_mutex for this to be safe.
1168 */
1169 static int splice_dentry(struct dentry **pdn, struct inode *in)
1170 {
1171 struct dentry *dn = *pdn;
1172 struct dentry *realdn;
1173
1174 BUG_ON(d_inode(dn));
1175
1176 if (S_ISDIR(in->i_mode)) {
1177 /* If inode is directory, d_splice_alias() below will remove
1178 * 'realdn' from its origin parent. We need to ensure that
1179 * origin parent's readdir cache will not reference 'realdn'
1180 */
1181 realdn = d_find_any_alias(in);
1182 if (realdn) {
1183 struct ceph_dentry_info *di = ceph_dentry(realdn);
1184 spin_lock(&realdn->d_lock);
1185
1186 realdn->d_op->d_prune(realdn);
1187
1188 di->time = jiffies;
1189 di->lease_shared_gen = 0;
1190 di->offset = 0;
1191
1192 spin_unlock(&realdn->d_lock);
1193 dput(realdn);
1194 }
1195 }
1196
1197 /* dn must be unhashed */
1198 if (!d_unhashed(dn))
1199 d_drop(dn);
1200 realdn = d_splice_alias(in, dn);
1201 if (IS_ERR(realdn)) {
1202 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1203 PTR_ERR(realdn), dn, in, ceph_vinop(in));
1204 return PTR_ERR(realdn);
1205 }
1206
1207 if (realdn) {
1208 dout("dn %p (%d) spliced with %p (%d) "
1209 "inode %p ino %llx.%llx\n",
1210 dn, d_count(dn),
1211 realdn, d_count(realdn),
1212 d_inode(realdn), ceph_vinop(d_inode(realdn)));
1213 dput(dn);
1214 *pdn = realdn;
1215 } else {
1216 BUG_ON(!ceph_dentry(dn));
1217 dout("dn %p attached to %p ino %llx.%llx\n",
1218 dn, d_inode(dn), ceph_vinop(d_inode(dn)));
1219 }
1220 return 0;
1221 }
1222
1223 /*
1224 * Incorporate results into the local cache. This is either just
1225 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1226 * after a lookup).
1227 *
1228 * A reply may contain
1229 * a directory inode along with a dentry.
1230 * and/or a target inode
1231 *
1232 * Called with snap_rwsem (read).
1233 */
1234 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
1235 {
1236 struct ceph_mds_session *session = req->r_session;
1237 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1238 struct inode *in = NULL;
1239 struct ceph_vino tvino, dvino;
1240 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1241 int err = 0;
1242
1243 dout("fill_trace %p is_dentry %d is_target %d\n", req,
1244 rinfo->head->is_dentry, rinfo->head->is_target);
1245
1246 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1247 dout("fill_trace reply is empty!\n");
1248 if (rinfo->head->result == 0 && req->r_parent)
1249 ceph_invalidate_dir_request(req);
1250 return 0;
1251 }
1252
1253 if (rinfo->head->is_dentry) {
1254 struct inode *dir = req->r_parent;
1255
1256 if (dir) {
1257 err = ceph_fill_inode(dir, NULL, &rinfo->diri,
1258 rinfo->dirfrag, session, -1,
1259 &req->r_caps_reservation);
1260 if (err < 0)
1261 goto done;
1262 } else {
1263 WARN_ON_ONCE(1);
1264 }
1265
1266 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME &&
1267 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1268 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1269 struct qstr dname;
1270 struct dentry *dn, *parent;
1271
1272 BUG_ON(!rinfo->head->is_target);
1273 BUG_ON(req->r_dentry);
1274
1275 parent = d_find_any_alias(dir);
1276 BUG_ON(!parent);
1277
1278 dname.name = rinfo->dname;
1279 dname.len = rinfo->dname_len;
1280 dname.hash = full_name_hash(parent, dname.name, dname.len);
1281 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1282 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1283 retry_lookup:
1284 dn = d_lookup(parent, &dname);
1285 dout("d_lookup on parent=%p name=%.*s got %p\n",
1286 parent, dname.len, dname.name, dn);
1287
1288 if (!dn) {
1289 dn = d_alloc(parent, &dname);
1290 dout("d_alloc %p '%.*s' = %p\n", parent,
1291 dname.len, dname.name, dn);
1292 if (!dn) {
1293 dput(parent);
1294 err = -ENOMEM;
1295 goto done;
1296 }
1297 err = 0;
1298 } else if (d_really_is_positive(dn) &&
1299 (ceph_ino(d_inode(dn)) != tvino.ino ||
1300 ceph_snap(d_inode(dn)) != tvino.snap)) {
1301 dout(" dn %p points to wrong inode %p\n",
1302 dn, d_inode(dn));
1303 ceph_dir_clear_ordered(dir);
1304 d_delete(dn);
1305 dput(dn);
1306 goto retry_lookup;
1307 }
1308
1309 req->r_dentry = dn;
1310 dput(parent);
1311 }
1312 }
1313
1314 if (rinfo->head->is_target) {
1315 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1316 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1317
1318 in = ceph_get_inode(sb, tvino);
1319 if (IS_ERR(in)) {
1320 err = PTR_ERR(in);
1321 goto done;
1322 }
1323
1324 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti,
1325 NULL, session,
1326 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1327 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) &&
1328 rinfo->head->result == 0) ? req->r_fmode : -1,
1329 &req->r_caps_reservation);
1330 if (err < 0) {
1331 pr_err("ceph_fill_inode badness %p %llx.%llx\n",
1332 in, ceph_vinop(in));
1333 if (in->i_state & I_NEW)
1334 discard_new_inode(in);
1335 goto done;
1336 }
1337 req->r_target_inode = in;
1338 if (in->i_state & I_NEW)
1339 unlock_new_inode(in);
1340 }
1341
1342 /*
1343 * ignore null lease/binding on snapdir ENOENT, or else we
1344 * will have trouble splicing in the virtual snapdir later
1345 */
1346 if (rinfo->head->is_dentry &&
1347 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1348 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1349 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1350 fsc->mount_options->snapdir_name,
1351 req->r_dentry->d_name.len))) {
1352 /*
1353 * lookup link rename : null -> possibly existing inode
1354 * mknod symlink mkdir : null -> new inode
1355 * unlink : linked -> null
1356 */
1357 struct inode *dir = req->r_parent;
1358 struct dentry *dn = req->r_dentry;
1359 bool have_dir_cap, have_lease;
1360
1361 BUG_ON(!dn);
1362 BUG_ON(!dir);
1363 BUG_ON(d_inode(dn->d_parent) != dir);
1364
1365 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1366 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1367
1368 BUG_ON(ceph_ino(dir) != dvino.ino);
1369 BUG_ON(ceph_snap(dir) != dvino.snap);
1370
1371 /* do we have a lease on the whole dir? */
1372 have_dir_cap =
1373 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1374 CEPH_CAP_FILE_SHARED);
1375
1376 /* do we have a dn lease? */
1377 have_lease = have_dir_cap ||
1378 le32_to_cpu(rinfo->dlease->duration_ms);
1379 if (!have_lease)
1380 dout("fill_trace no dentry lease or dir cap\n");
1381
1382 /* rename? */
1383 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1384 struct inode *olddir = req->r_old_dentry_dir;
1385 BUG_ON(!olddir);
1386
1387 dout(" src %p '%pd' dst %p '%pd'\n",
1388 req->r_old_dentry,
1389 req->r_old_dentry,
1390 dn, dn);
1391 dout("fill_trace doing d_move %p -> %p\n",
1392 req->r_old_dentry, dn);
1393
1394 /* d_move screws up sibling dentries' offsets */
1395 ceph_dir_clear_ordered(dir);
1396 ceph_dir_clear_ordered(olddir);
1397
1398 d_move(req->r_old_dentry, dn);
1399 dout(" src %p '%pd' dst %p '%pd'\n",
1400 req->r_old_dentry,
1401 req->r_old_dentry,
1402 dn, dn);
1403
1404 /* ensure target dentry is invalidated, despite
1405 rehashing bug in vfs_rename_dir */
1406 ceph_invalidate_dentry_lease(dn);
1407
1408 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1409 ceph_dentry(req->r_old_dentry)->offset);
1410
1411 /* swap r_dentry and r_old_dentry in case that
1412 * splice_dentry() gets called later. This is safe
1413 * because no other place will use them */
1414 req->r_dentry = req->r_old_dentry;
1415 req->r_old_dentry = dn;
1416 dn = req->r_dentry;
1417 }
1418
1419 /* null dentry? */
1420 if (!rinfo->head->is_target) {
1421 dout("fill_trace null dentry\n");
1422 if (d_really_is_positive(dn)) {
1423 dout("d_delete %p\n", dn);
1424 ceph_dir_clear_ordered(dir);
1425 d_delete(dn);
1426 } else if (have_lease) {
1427 if (d_unhashed(dn))
1428 d_add(dn, NULL);
1429 update_dentry_lease(dir, dn,
1430 rinfo->dlease, session,
1431 req->r_request_started);
1432 }
1433 goto done;
1434 }
1435
1436 /* attach proper inode */
1437 if (d_really_is_negative(dn)) {
1438 ceph_dir_clear_ordered(dir);
1439 ihold(in);
1440 err = splice_dentry(&req->r_dentry, in);
1441 if (err < 0)
1442 goto done;
1443 dn = req->r_dentry; /* may have spliced */
1444 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
1445 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1446 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1447 ceph_vinop(in));
1448 d_invalidate(dn);
1449 have_lease = false;
1450 }
1451
1452 if (have_lease) {
1453 update_dentry_lease(dir, dn,
1454 rinfo->dlease, session,
1455 req->r_request_started);
1456 }
1457 dout(" final dn %p\n", dn);
1458 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1459 req->r_op == CEPH_MDS_OP_MKSNAP) &&
1460 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1461 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1462 struct inode *dir = req->r_parent;
1463
1464 /* fill out a snapdir LOOKUPSNAP dentry */
1465 BUG_ON(!dir);
1466 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
1467 BUG_ON(!req->r_dentry);
1468 dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry);
1469 ceph_dir_clear_ordered(dir);
1470 ihold(in);
1471 err = splice_dentry(&req->r_dentry, in);
1472 if (err < 0)
1473 goto done;
1474 } else if (rinfo->head->is_dentry && req->r_dentry) {
1475 /* parent inode is not locked, be carefull */
1476 struct ceph_vino *ptvino = NULL;
1477 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1478 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1479 if (rinfo->head->is_target) {
1480 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1481 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1482 ptvino = &tvino;
1483 }
1484 update_dentry_lease_careful(req->r_dentry, rinfo->dlease,
1485 session, req->r_request_started,
1486 rinfo->dname, rinfo->dname_len,
1487 &dvino, ptvino);
1488 }
1489 done:
1490 dout("fill_trace done err=%d\n", err);
1491 return err;
1492 }
1493
1494 /*
1495 * Prepopulate our cache with readdir results, leases, etc.
1496 */
1497 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1498 struct ceph_mds_session *session)
1499 {
1500 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1501 int i, err = 0;
1502
1503 for (i = 0; i < rinfo->dir_nr; i++) {
1504 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1505 struct ceph_vino vino;
1506 struct inode *in;
1507 int rc;
1508
1509 vino.ino = le64_to_cpu(rde->inode.in->ino);
1510 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1511
1512 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1513 if (IS_ERR(in)) {
1514 err = PTR_ERR(in);
1515 dout("new_inode badness got %d\n", err);
1516 continue;
1517 }
1518 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
1519 -1, &req->r_caps_reservation);
1520 if (rc < 0) {
1521 pr_err("ceph_fill_inode badness on %p got %d\n",
1522 in, rc);
1523 err = rc;
1524 if (in->i_state & I_NEW) {
1525 ihold(in);
1526 discard_new_inode(in);
1527 }
1528 } else if (in->i_state & I_NEW) {
1529 unlock_new_inode(in);
1530 }
1531
1532 /* avoid calling iput_final() in mds dispatch threads */
1533 ceph_async_iput(in);
1534 }
1535
1536 return err;
1537 }
1538
1539 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1540 {
1541 if (ctl->page) {
1542 kunmap(ctl->page);
1543 put_page(ctl->page);
1544 ctl->page = NULL;
1545 }
1546 }
1547
1548 static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1549 struct ceph_readdir_cache_control *ctl,
1550 struct ceph_mds_request *req)
1551 {
1552 struct ceph_inode_info *ci = ceph_inode(dir);
1553 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
1554 unsigned idx = ctl->index % nsize;
1555 pgoff_t pgoff = ctl->index / nsize;
1556
1557 if (!ctl->page || pgoff != page_index(ctl->page)) {
1558 ceph_readdir_cache_release(ctl);
1559 if (idx == 0)
1560 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1561 else
1562 ctl->page = find_lock_page(&dir->i_data, pgoff);
1563 if (!ctl->page) {
1564 ctl->index = -1;
1565 return idx == 0 ? -ENOMEM : 0;
1566 }
1567 /* reading/filling the cache are serialized by
1568 * i_mutex, no need to use page lock */
1569 unlock_page(ctl->page);
1570 ctl->dentries = kmap(ctl->page);
1571 if (idx == 0)
1572 memset(ctl->dentries, 0, PAGE_SIZE);
1573 }
1574
1575 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1576 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1577 dout("readdir cache dn %p idx %d\n", dn, ctl->index);
1578 ctl->dentries[idx] = dn;
1579 ctl->index++;
1580 } else {
1581 dout("disable readdir cache\n");
1582 ctl->index = -1;
1583 }
1584 return 0;
1585 }
1586
1587 int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1588 struct ceph_mds_session *session)
1589 {
1590 struct dentry *parent = req->r_dentry;
1591 struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
1592 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1593 struct qstr dname;
1594 struct dentry *dn;
1595 struct inode *in;
1596 int err = 0, skipped = 0, ret, i;
1597 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1598 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1599 u32 last_hash = 0;
1600 u32 fpos_offset;
1601 struct ceph_readdir_cache_control cache_ctl = {};
1602
1603 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
1604 return readdir_prepopulate_inodes_only(req, session);
1605
1606 if (rinfo->hash_order) {
1607 if (req->r_path2) {
1608 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1609 req->r_path2,
1610 strlen(req->r_path2));
1611 last_hash = ceph_frag_value(last_hash);
1612 } else if (rinfo->offset_hash) {
1613 /* mds understands offset_hash */
1614 WARN_ON_ONCE(req->r_readdir_offset != 2);
1615 last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
1616 }
1617 }
1618
1619 if (rinfo->dir_dir &&
1620 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1621 dout("readdir_prepopulate got new frag %x -> %x\n",
1622 frag, le32_to_cpu(rinfo->dir_dir->frag));
1623 frag = le32_to_cpu(rinfo->dir_dir->frag);
1624 if (!rinfo->hash_order)
1625 req->r_readdir_offset = 2;
1626 }
1627
1628 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1629 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1630 rinfo->dir_nr, parent);
1631 } else {
1632 dout("readdir_prepopulate %d items under dn %p\n",
1633 rinfo->dir_nr, parent);
1634 if (rinfo->dir_dir)
1635 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
1636
1637 if (ceph_frag_is_leftmost(frag) &&
1638 req->r_readdir_offset == 2 &&
1639 !(rinfo->hash_order && last_hash)) {
1640 /* note dir version at start of readdir so we can
1641 * tell if any dentries get dropped */
1642 req->r_dir_release_cnt =
1643 atomic64_read(&ci->i_release_count);
1644 req->r_dir_ordered_cnt =
1645 atomic64_read(&ci->i_ordered_count);
1646 req->r_readdir_cache_idx = 0;
1647 }
1648 }
1649
1650 cache_ctl.index = req->r_readdir_cache_idx;
1651 fpos_offset = req->r_readdir_offset;
1652
1653 /* FIXME: release caps/leases if error occurs */
1654 for (i = 0; i < rinfo->dir_nr; i++) {
1655 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1656 struct ceph_vino tvino;
1657
1658 dname.name = rde->name;
1659 dname.len = rde->name_len;
1660 dname.hash = full_name_hash(parent, dname.name, dname.len);
1661
1662 tvino.ino = le64_to_cpu(rde->inode.in->ino);
1663 tvino.snap = le64_to_cpu(rde->inode.in->snapid);
1664
1665 if (rinfo->hash_order) {
1666 u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1667 rde->name, rde->name_len);
1668 hash = ceph_frag_value(hash);
1669 if (hash != last_hash)
1670 fpos_offset = 2;
1671 last_hash = hash;
1672 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1673 } else {
1674 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1675 }
1676
1677 retry_lookup:
1678 dn = d_lookup(parent, &dname);
1679 dout("d_lookup on parent=%p name=%.*s got %p\n",
1680 parent, dname.len, dname.name, dn);
1681
1682 if (!dn) {
1683 dn = d_alloc(parent, &dname);
1684 dout("d_alloc %p '%.*s' = %p\n", parent,
1685 dname.len, dname.name, dn);
1686 if (!dn) {
1687 dout("d_alloc badness\n");
1688 err = -ENOMEM;
1689 goto out;
1690 }
1691 } else if (d_really_is_positive(dn) &&
1692 (ceph_ino(d_inode(dn)) != tvino.ino ||
1693 ceph_snap(d_inode(dn)) != tvino.snap)) {
1694 struct ceph_dentry_info *di = ceph_dentry(dn);
1695 dout(" dn %p points to wrong inode %p\n",
1696 dn, d_inode(dn));
1697
1698 spin_lock(&dn->d_lock);
1699 if (di->offset > 0 &&
1700 di->lease_shared_gen ==
1701 atomic_read(&ci->i_shared_gen)) {
1702 __ceph_dir_clear_ordered(ci);
1703 di->offset = 0;
1704 }
1705 spin_unlock(&dn->d_lock);
1706
1707 d_delete(dn);
1708 dput(dn);
1709 goto retry_lookup;
1710 }
1711
1712 /* inode */
1713 if (d_really_is_positive(dn)) {
1714 in = d_inode(dn);
1715 } else {
1716 in = ceph_get_inode(parent->d_sb, tvino);
1717 if (IS_ERR(in)) {
1718 dout("new_inode badness\n");
1719 d_drop(dn);
1720 dput(dn);
1721 err = PTR_ERR(in);
1722 goto out;
1723 }
1724 }
1725
1726 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
1727 -1, &req->r_caps_reservation);
1728 if (ret < 0) {
1729 pr_err("ceph_fill_inode badness on %p\n", in);
1730 if (d_really_is_negative(dn)) {
1731 /* avoid calling iput_final() in mds
1732 * dispatch threads */
1733 if (in->i_state & I_NEW) {
1734 ihold(in);
1735 discard_new_inode(in);
1736 }
1737 ceph_async_iput(in);
1738 }
1739 d_drop(dn);
1740 err = ret;
1741 goto next_item;
1742 }
1743 if (in->i_state & I_NEW)
1744 unlock_new_inode(in);
1745
1746 if (d_really_is_negative(dn)) {
1747 if (ceph_security_xattr_deadlock(in)) {
1748 dout(" skip splicing dn %p to inode %p"
1749 " (security xattr deadlock)\n", dn, in);
1750 ceph_async_iput(in);
1751 skipped++;
1752 goto next_item;
1753 }
1754
1755 err = splice_dentry(&dn, in);
1756 if (err < 0)
1757 goto next_item;
1758 }
1759
1760 ceph_dentry(dn)->offset = rde->offset;
1761
1762 update_dentry_lease(d_inode(parent), dn,
1763 rde->lease, req->r_session,
1764 req->r_request_started);
1765
1766 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
1767 ret = fill_readdir_cache(d_inode(parent), dn,
1768 &cache_ctl, req);
1769 if (ret < 0)
1770 err = ret;
1771 }
1772 next_item:
1773 dput(dn);
1774 }
1775 out:
1776 if (err == 0 && skipped == 0) {
1777 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
1778 req->r_readdir_cache_idx = cache_ctl.index;
1779 }
1780 ceph_readdir_cache_release(&cache_ctl);
1781 dout("readdir_prepopulate done\n");
1782 return err;
1783 }
1784
1785 bool ceph_inode_set_size(struct inode *inode, loff_t size)
1786 {
1787 struct ceph_inode_info *ci = ceph_inode(inode);
1788 bool ret;
1789
1790 spin_lock(&ci->i_ceph_lock);
1791 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1792 i_size_write(inode, size);
1793 inode->i_blocks = calc_inode_blocks(size);
1794
1795 ret = __ceph_should_report_size(ci);
1796
1797 spin_unlock(&ci->i_ceph_lock);
1798 return ret;
1799 }
1800
1801 /*
1802 * Put reference to inode, but avoid calling iput_final() in current thread.
1803 * iput_final() may wait for reahahead pages. The wait can cause deadlock in
1804 * some contexts.
1805 */
1806 void ceph_async_iput(struct inode *inode)
1807 {
1808 if (!inode)
1809 return;
1810 for (;;) {
1811 if (atomic_add_unless(&inode->i_count, -1, 1))
1812 break;
1813 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1814 &ceph_inode(inode)->i_work))
1815 break;
1816 /* queue work failed, i_count must be at least 2 */
1817 }
1818 }
1819
1820 /*
1821 * Write back inode data in a worker thread. (This can't be done
1822 * in the message handler context.)
1823 */
1824 void ceph_queue_writeback(struct inode *inode)
1825 {
1826 struct ceph_inode_info *ci = ceph_inode(inode);
1827 set_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask);
1828
1829 ihold(inode);
1830 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1831 &ci->i_work)) {
1832 dout("ceph_queue_writeback %p\n", inode);
1833 } else {
1834 dout("ceph_queue_writeback %p already queued, mask=%lx\n",
1835 inode, ci->i_work_mask);
1836 iput(inode);
1837 }
1838 }
1839
1840 /*
1841 * queue an async invalidation
1842 */
1843 void ceph_queue_invalidate(struct inode *inode)
1844 {
1845 struct ceph_inode_info *ci = ceph_inode(inode);
1846 set_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask);
1847
1848 ihold(inode);
1849 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1850 &ceph_inode(inode)->i_work)) {
1851 dout("ceph_queue_invalidate %p\n", inode);
1852 } else {
1853 dout("ceph_queue_invalidate %p already queued, mask=%lx\n",
1854 inode, ci->i_work_mask);
1855 iput(inode);
1856 }
1857 }
1858
1859 /*
1860 * Queue an async vmtruncate. If we fail to queue work, we will handle
1861 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1862 */
1863 void ceph_queue_vmtruncate(struct inode *inode)
1864 {
1865 struct ceph_inode_info *ci = ceph_inode(inode);
1866 set_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask);
1867
1868 ihold(inode);
1869 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1870 &ci->i_work)) {
1871 dout("ceph_queue_vmtruncate %p\n", inode);
1872 } else {
1873 dout("ceph_queue_vmtruncate %p already queued, mask=%lx\n",
1874 inode, ci->i_work_mask);
1875 iput(inode);
1876 }
1877 }
1878
1879 static void ceph_do_invalidate_pages(struct inode *inode)
1880 {
1881 struct ceph_inode_info *ci = ceph_inode(inode);
1882 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1883 u32 orig_gen;
1884 int check = 0;
1885
1886 mutex_lock(&ci->i_truncate_mutex);
1887
1888 if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
1889 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1890 inode, ceph_ino(inode));
1891 mapping_set_error(inode->i_mapping, -EIO);
1892 truncate_pagecache(inode, 0);
1893 mutex_unlock(&ci->i_truncate_mutex);
1894 goto out;
1895 }
1896
1897 spin_lock(&ci->i_ceph_lock);
1898 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1899 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1900 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1901 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1902 check = 1;
1903 spin_unlock(&ci->i_ceph_lock);
1904 mutex_unlock(&ci->i_truncate_mutex);
1905 goto out;
1906 }
1907 orig_gen = ci->i_rdcache_gen;
1908 spin_unlock(&ci->i_ceph_lock);
1909
1910 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
1911 pr_err("invalidate_pages %p fails\n", inode);
1912 }
1913
1914 spin_lock(&ci->i_ceph_lock);
1915 if (orig_gen == ci->i_rdcache_gen &&
1916 orig_gen == ci->i_rdcache_revoking) {
1917 dout("invalidate_pages %p gen %d successful\n", inode,
1918 ci->i_rdcache_gen);
1919 ci->i_rdcache_revoking--;
1920 check = 1;
1921 } else {
1922 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1923 inode, orig_gen, ci->i_rdcache_gen,
1924 ci->i_rdcache_revoking);
1925 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1926 check = 1;
1927 }
1928 spin_unlock(&ci->i_ceph_lock);
1929 mutex_unlock(&ci->i_truncate_mutex);
1930 out:
1931 if (check)
1932 ceph_check_caps(ci, 0, NULL);
1933 }
1934
1935 /*
1936 * Make sure any pending truncation is applied before doing anything
1937 * that may depend on it.
1938 */
1939 void __ceph_do_pending_vmtruncate(struct inode *inode)
1940 {
1941 struct ceph_inode_info *ci = ceph_inode(inode);
1942 u64 to;
1943 int wrbuffer_refs, finish = 0;
1944
1945 mutex_lock(&ci->i_truncate_mutex);
1946 retry:
1947 spin_lock(&ci->i_ceph_lock);
1948 if (ci->i_truncate_pending == 0) {
1949 dout("__do_pending_vmtruncate %p none pending\n", inode);
1950 spin_unlock(&ci->i_ceph_lock);
1951 mutex_unlock(&ci->i_truncate_mutex);
1952 return;
1953 }
1954
1955 /*
1956 * make sure any dirty snapped pages are flushed before we
1957 * possibly truncate them.. so write AND block!
1958 */
1959 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1960 spin_unlock(&ci->i_ceph_lock);
1961 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1962 inode);
1963 filemap_write_and_wait_range(&inode->i_data, 0,
1964 inode->i_sb->s_maxbytes);
1965 goto retry;
1966 }
1967
1968 /* there should be no reader or writer */
1969 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1970
1971 to = ci->i_truncate_size;
1972 wrbuffer_refs = ci->i_wrbuffer_ref;
1973 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1974 ci->i_truncate_pending, to);
1975 spin_unlock(&ci->i_ceph_lock);
1976
1977 truncate_pagecache(inode, to);
1978
1979 spin_lock(&ci->i_ceph_lock);
1980 if (to == ci->i_truncate_size) {
1981 ci->i_truncate_pending = 0;
1982 finish = 1;
1983 }
1984 spin_unlock(&ci->i_ceph_lock);
1985 if (!finish)
1986 goto retry;
1987
1988 mutex_unlock(&ci->i_truncate_mutex);
1989
1990 if (wrbuffer_refs == 0)
1991 ceph_check_caps(ci, 0, NULL);
1992
1993 wake_up_all(&ci->i_cap_wq);
1994 }
1995
1996 static void ceph_inode_work(struct work_struct *work)
1997 {
1998 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1999 i_work);
2000 struct inode *inode = &ci->vfs_inode;
2001
2002 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) {
2003 dout("writeback %p\n", inode);
2004 filemap_fdatawrite(&inode->i_data);
2005 }
2006 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask))
2007 ceph_do_invalidate_pages(inode);
2008
2009 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask))
2010 __ceph_do_pending_vmtruncate(inode);
2011
2012 iput(inode);
2013 }
2014
2015 /*
2016 * symlinks
2017 */
2018 static const struct inode_operations ceph_symlink_iops = {
2019 .get_link = simple_get_link,
2020 .setattr = ceph_setattr,
2021 .getattr = ceph_getattr,
2022 .listxattr = ceph_listxattr,
2023 };
2024
2025 int __ceph_setattr(struct inode *inode, struct iattr *attr)
2026 {
2027 struct ceph_inode_info *ci = ceph_inode(inode);
2028 unsigned int ia_valid = attr->ia_valid;
2029 struct ceph_mds_request *req;
2030 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
2031 struct ceph_cap_flush *prealloc_cf;
2032 int issued;
2033 int release = 0, dirtied = 0;
2034 int mask = 0;
2035 int err = 0;
2036 int inode_dirty_flags = 0;
2037 bool lock_snap_rwsem = false;
2038
2039 prealloc_cf = ceph_alloc_cap_flush();
2040 if (!prealloc_cf)
2041 return -ENOMEM;
2042
2043 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
2044 USE_AUTH_MDS);
2045 if (IS_ERR(req)) {
2046 ceph_free_cap_flush(prealloc_cf);
2047 return PTR_ERR(req);
2048 }
2049
2050 spin_lock(&ci->i_ceph_lock);
2051 issued = __ceph_caps_issued(ci, NULL);
2052
2053 if (!ci->i_head_snapc &&
2054 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
2055 lock_snap_rwsem = true;
2056 if (!down_read_trylock(&mdsc->snap_rwsem)) {
2057 spin_unlock(&ci->i_ceph_lock);
2058 down_read(&mdsc->snap_rwsem);
2059 spin_lock(&ci->i_ceph_lock);
2060 issued = __ceph_caps_issued(ci, NULL);
2061 }
2062 }
2063
2064 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
2065
2066 if (ia_valid & ATTR_UID) {
2067 dout("setattr %p uid %d -> %d\n", inode,
2068 from_kuid(&init_user_ns, inode->i_uid),
2069 from_kuid(&init_user_ns, attr->ia_uid));
2070 if (issued & CEPH_CAP_AUTH_EXCL) {
2071 inode->i_uid = attr->ia_uid;
2072 dirtied |= CEPH_CAP_AUTH_EXCL;
2073 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2074 !uid_eq(attr->ia_uid, inode->i_uid)) {
2075 req->r_args.setattr.uid = cpu_to_le32(
2076 from_kuid(&init_user_ns, attr->ia_uid));
2077 mask |= CEPH_SETATTR_UID;
2078 release |= CEPH_CAP_AUTH_SHARED;
2079 }
2080 }
2081 if (ia_valid & ATTR_GID) {
2082 dout("setattr %p gid %d -> %d\n", inode,
2083 from_kgid(&init_user_ns, inode->i_gid),
2084 from_kgid(&init_user_ns, attr->ia_gid));
2085 if (issued & CEPH_CAP_AUTH_EXCL) {
2086 inode->i_gid = attr->ia_gid;
2087 dirtied |= CEPH_CAP_AUTH_EXCL;
2088 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2089 !gid_eq(attr->ia_gid, inode->i_gid)) {
2090 req->r_args.setattr.gid = cpu_to_le32(
2091 from_kgid(&init_user_ns, attr->ia_gid));
2092 mask |= CEPH_SETATTR_GID;
2093 release |= CEPH_CAP_AUTH_SHARED;
2094 }
2095 }
2096 if (ia_valid & ATTR_MODE) {
2097 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
2098 attr->ia_mode);
2099 if (issued & CEPH_CAP_AUTH_EXCL) {
2100 inode->i_mode = attr->ia_mode;
2101 dirtied |= CEPH_CAP_AUTH_EXCL;
2102 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2103 attr->ia_mode != inode->i_mode) {
2104 inode->i_mode = attr->ia_mode;
2105 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
2106 mask |= CEPH_SETATTR_MODE;
2107 release |= CEPH_CAP_AUTH_SHARED;
2108 }
2109 }
2110
2111 if (ia_valid & ATTR_ATIME) {
2112 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode,
2113 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
2114 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
2115 if (issued & CEPH_CAP_FILE_EXCL) {
2116 ci->i_time_warp_seq++;
2117 inode->i_atime = attr->ia_atime;
2118 dirtied |= CEPH_CAP_FILE_EXCL;
2119 } else if ((issued & CEPH_CAP_FILE_WR) &&
2120 timespec64_compare(&inode->i_atime,
2121 &attr->ia_atime) < 0) {
2122 inode->i_atime = attr->ia_atime;
2123 dirtied |= CEPH_CAP_FILE_WR;
2124 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2125 !timespec64_equal(&inode->i_atime, &attr->ia_atime)) {
2126 ceph_encode_timespec64(&req->r_args.setattr.atime,
2127 &attr->ia_atime);
2128 mask |= CEPH_SETATTR_ATIME;
2129 release |= CEPH_CAP_FILE_SHARED |
2130 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2131 }
2132 }
2133 if (ia_valid & ATTR_SIZE) {
2134 dout("setattr %p size %lld -> %lld\n", inode,
2135 inode->i_size, attr->ia_size);
2136 if ((issued & CEPH_CAP_FILE_EXCL) &&
2137 attr->ia_size > inode->i_size) {
2138 i_size_write(inode, attr->ia_size);
2139 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2140 ci->i_reported_size = attr->ia_size;
2141 dirtied |= CEPH_CAP_FILE_EXCL;
2142 ia_valid |= ATTR_MTIME;
2143 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2144 attr->ia_size != inode->i_size) {
2145 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2146 req->r_args.setattr.old_size =
2147 cpu_to_le64(inode->i_size);
2148 mask |= CEPH_SETATTR_SIZE;
2149 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2150 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2151 }
2152 }
2153 if (ia_valid & ATTR_MTIME) {
2154 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode,
2155 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
2156 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
2157 if (issued & CEPH_CAP_FILE_EXCL) {
2158 ci->i_time_warp_seq++;
2159 inode->i_mtime = attr->ia_mtime;
2160 dirtied |= CEPH_CAP_FILE_EXCL;
2161 } else if ((issued & CEPH_CAP_FILE_WR) &&
2162 timespec64_compare(&inode->i_mtime,
2163 &attr->ia_mtime) < 0) {
2164 inode->i_mtime = attr->ia_mtime;
2165 dirtied |= CEPH_CAP_FILE_WR;
2166 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2167 !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) {
2168 ceph_encode_timespec64(&req->r_args.setattr.mtime,
2169 &attr->ia_mtime);
2170 mask |= CEPH_SETATTR_MTIME;
2171 release |= CEPH_CAP_FILE_SHARED |
2172 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2173 }
2174 }
2175
2176 /* these do nothing */
2177 if (ia_valid & ATTR_CTIME) {
2178 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2179 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
2180 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode,
2181 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
2182 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2183 only ? "ctime only" : "ignored");
2184 if (only) {
2185 /*
2186 * if kernel wants to dirty ctime but nothing else,
2187 * we need to choose a cap to dirty under, or do
2188 * a almost-no-op setattr
2189 */
2190 if (issued & CEPH_CAP_AUTH_EXCL)
2191 dirtied |= CEPH_CAP_AUTH_EXCL;
2192 else if (issued & CEPH_CAP_FILE_EXCL)
2193 dirtied |= CEPH_CAP_FILE_EXCL;
2194 else if (issued & CEPH_CAP_XATTR_EXCL)
2195 dirtied |= CEPH_CAP_XATTR_EXCL;
2196 else
2197 mask |= CEPH_SETATTR_CTIME;
2198 }
2199 }
2200 if (ia_valid & ATTR_FILE)
2201 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
2202
2203 if (dirtied) {
2204 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2205 &prealloc_cf);
2206 inode->i_ctime = attr->ia_ctime;
2207 }
2208
2209 release &= issued;
2210 spin_unlock(&ci->i_ceph_lock);
2211 if (lock_snap_rwsem)
2212 up_read(&mdsc->snap_rwsem);
2213
2214 if (inode_dirty_flags)
2215 __mark_inode_dirty(inode, inode_dirty_flags);
2216
2217
2218 if (mask) {
2219 req->r_inode = inode;
2220 ihold(inode);
2221 req->r_inode_drop = release;
2222 req->r_args.setattr.mask = cpu_to_le32(mask);
2223 req->r_num_caps = 1;
2224 req->r_stamp = attr->ia_ctime;
2225 err = ceph_mdsc_do_request(mdsc, NULL, req);
2226 }
2227 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
2228 ceph_cap_string(dirtied), mask);
2229
2230 ceph_mdsc_put_request(req);
2231 ceph_free_cap_flush(prealloc_cf);
2232
2233 if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
2234 __ceph_do_pending_vmtruncate(inode);
2235
2236 return err;
2237 }
2238
2239 /*
2240 * setattr
2241 */
2242 int ceph_setattr(struct dentry *dentry, struct iattr *attr)
2243 {
2244 struct inode *inode = d_inode(dentry);
2245 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
2246 int err;
2247
2248 if (ceph_snap(inode) != CEPH_NOSNAP)
2249 return -EROFS;
2250
2251 err = setattr_prepare(dentry, attr);
2252 if (err != 0)
2253 return err;
2254
2255 if ((attr->ia_valid & ATTR_SIZE) &&
2256 attr->ia_size > max(inode->i_size, fsc->max_file_size))
2257 return -EFBIG;
2258
2259 if ((attr->ia_valid & ATTR_SIZE) &&
2260 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size))
2261 return -EDQUOT;
2262
2263 err = __ceph_setattr(inode, attr);
2264
2265 if (err >= 0 && (attr->ia_valid & ATTR_MODE))
2266 err = posix_acl_chmod(inode, attr->ia_mode);
2267
2268 return err;
2269 }
2270
2271 /*
2272 * Verify that we have a lease on the given mask. If not,
2273 * do a getattr against an mds.
2274 */
2275 int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2276 int mask, bool force)
2277 {
2278 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
2279 struct ceph_mds_client *mdsc = fsc->mdsc;
2280 struct ceph_mds_request *req;
2281 int mode;
2282 int err;
2283
2284 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2285 dout("do_getattr inode %p SNAPDIR\n", inode);
2286 return 0;
2287 }
2288
2289 dout("do_getattr inode %p mask %s mode 0%o\n",
2290 inode, ceph_cap_string(mask), inode->i_mode);
2291 if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
2292 return 0;
2293
2294 mode = (mask & CEPH_STAT_RSTAT) ? USE_AUTH_MDS : USE_ANY_MDS;
2295 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode);
2296 if (IS_ERR(req))
2297 return PTR_ERR(req);
2298 req->r_inode = inode;
2299 ihold(inode);
2300 req->r_num_caps = 1;
2301 req->r_args.getattr.mask = cpu_to_le32(mask);
2302 req->r_locked_page = locked_page;
2303 err = ceph_mdsc_do_request(mdsc, NULL, req);
2304 if (locked_page && err == 0) {
2305 u64 inline_version = req->r_reply_info.targeti.inline_version;
2306 if (inline_version == 0) {
2307 /* the reply is supposed to contain inline data */
2308 err = -EINVAL;
2309 } else if (inline_version == CEPH_INLINE_NONE) {
2310 err = -ENODATA;
2311 } else {
2312 err = req->r_reply_info.targeti.inline_len;
2313 }
2314 }
2315 ceph_mdsc_put_request(req);
2316 dout("do_getattr result=%d\n", err);
2317 return err;
2318 }
2319
2320
2321 /*
2322 * Check inode permissions. We verify we have a valid value for
2323 * the AUTH cap, then call the generic handler.
2324 */
2325 int ceph_permission(struct inode *inode, int mask)
2326 {
2327 int err;
2328
2329 if (mask & MAY_NOT_BLOCK)
2330 return -ECHILD;
2331
2332 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
2333
2334 if (!err)
2335 err = generic_permission(inode, mask);
2336 return err;
2337 }
2338
2339 /* Craft a mask of needed caps given a set of requested statx attrs. */
2340 static int statx_to_caps(u32 want)
2341 {
2342 int mask = 0;
2343
2344 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME))
2345 mask |= CEPH_CAP_AUTH_SHARED;
2346
2347 if (want & (STATX_NLINK|STATX_CTIME))
2348 mask |= CEPH_CAP_LINK_SHARED;
2349
2350 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|
2351 STATX_BLOCKS))
2352 mask |= CEPH_CAP_FILE_SHARED;
2353
2354 if (want & (STATX_CTIME))
2355 mask |= CEPH_CAP_XATTR_SHARED;
2356
2357 return mask;
2358 }
2359
2360 /*
2361 * Get all the attributes. If we have sufficient caps for the requested attrs,
2362 * then we can avoid talking to the MDS at all.
2363 */
2364 int ceph_getattr(const struct path *path, struct kstat *stat,
2365 u32 request_mask, unsigned int flags)
2366 {
2367 struct inode *inode = d_inode(path->dentry);
2368 struct ceph_inode_info *ci = ceph_inode(inode);
2369 u32 valid_mask = STATX_BASIC_STATS;
2370 int err = 0;
2371
2372 /* Skip the getattr altogether if we're asked not to sync */
2373 if (!(flags & AT_STATX_DONT_SYNC)) {
2374 err = ceph_do_getattr(inode, statx_to_caps(request_mask),
2375 flags & AT_STATX_FORCE_SYNC);
2376 if (err)
2377 return err;
2378 }
2379
2380 generic_fillattr(inode, stat);
2381 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
2382
2383 /*
2384 * btime on newly-allocated inodes is 0, so if this is still set to
2385 * that, then assume that it's not valid.
2386 */
2387 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) {
2388 stat->btime = ci->i_btime;
2389 valid_mask |= STATX_BTIME;
2390 }
2391
2392 if (ceph_snap(inode) == CEPH_NOSNAP)
2393 stat->dev = inode->i_sb->s_dev;
2394 else
2395 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0;
2396
2397 if (S_ISDIR(inode->i_mode)) {
2398 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
2399 RBYTES))
2400 stat->size = ci->i_rbytes;
2401 else
2402 stat->size = ci->i_files + ci->i_subdirs;
2403 stat->blocks = 0;
2404 stat->blksize = 65536;
2405 /*
2406 * Some applications rely on the number of st_nlink
2407 * value on directories to be either 0 (if unlinked)
2408 * or 2 + number of subdirectories.
2409 */
2410 if (stat->nlink == 1)
2411 /* '.' + '..' + subdirs */
2412 stat->nlink = 1 + 1 + ci->i_subdirs;
2413 }
2414
2415 stat->result_mask = request_mask & valid_mask;
2416 return err;
2417 }
Linux with added FPC-III support