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