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ALSA: hda - Adding one more ALC255 pin definition for headset problem
[linux/fpc-iii.git] / fs / ceph / inode.c
blobdd3a6dbf71ebcd8903ca6a04b2ba91fa24893baa
1 #include <linux/ceph/ceph_debug.h>
2
3 #include <linux/module.h>
4 #include <linux/fs.h>
5 #include <linux/slab.h>
6 #include <linux/string.h>
7 #include <linux/uaccess.h>
8 #include <linux/kernel.h>
9 #include <linux/writeback.h>
10 #include <linux/vmalloc.h>
11 #include <linux/xattr.h>
12 #include <linux/posix_acl.h>
13 #include <linux/random.h>
14 #include <linux/sort.h>
15
16 #include "super.h"
17 #include "mds_client.h"
18 #include "cache.h"
19 #include <linux/ceph/decode.h>
20
21 /*
22 * Ceph inode operations
23 *
24 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
25 * setattr, etc.), xattr helpers, and helpers for assimilating
26 * metadata returned by the MDS into our cache.
27 *
28 * Also define helpers for doing asynchronous writeback, invalidation,
29 * and truncation for the benefit of those who can't afford to block
30 * (typically because they are in the message handler path).
31 */
32
33 static const struct inode_operations ceph_symlink_iops;
34
35 static void ceph_invalidate_work(struct work_struct *work);
36 static void ceph_writeback_work(struct work_struct *work);
37 static void ceph_vmtruncate_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 return 0;
47 }
48
49 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
50 {
51 struct inode *inode;
52 ino_t t = ceph_vino_to_ino(vino);
53
54 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
55 if (inode == NULL)
56 return ERR_PTR(-ENOMEM);
57 if (inode->i_state & I_NEW) {
58 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
59 inode, ceph_vinop(inode), (u64)inode->i_ino);
60 unlock_new_inode(inode);
61 }
62
63 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
64 vino.snap, inode);
65 return inode;
66 }
67
68 /*
69 * get/constuct snapdir inode for a given directory
70 */
71 struct inode *ceph_get_snapdir(struct inode *parent)
72 {
73 struct ceph_vino vino = {
74 .ino = ceph_ino(parent),
75 .snap = CEPH_SNAPDIR,
76 };
77 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
78 struct ceph_inode_info *ci = ceph_inode(inode);
79
80 BUG_ON(!S_ISDIR(parent->i_mode));
81 if (IS_ERR(inode))
82 return inode;
83 inode->i_mode = parent->i_mode;
84 inode->i_uid = parent->i_uid;
85 inode->i_gid = parent->i_gid;
86 inode->i_op = &ceph_snapdir_iops;
87 inode->i_fop = &ceph_snapdir_fops;
88 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
89 ci->i_rbytes = 0;
90 return inode;
91 }
92
93 const struct inode_operations ceph_file_iops = {
94 .permission = ceph_permission,
95 .setattr = ceph_setattr,
96 .getattr = ceph_getattr,
97 .setxattr = generic_setxattr,
98 .getxattr = generic_getxattr,
99 .listxattr = ceph_listxattr,
100 .removexattr = generic_removexattr,
101 .get_acl = ceph_get_acl,
102 .set_acl = ceph_set_acl,
103 };
104
105
106 /*
107 * We use a 'frag tree' to keep track of the MDS's directory fragments
108 * for a given inode (usually there is just a single fragment). We
109 * need to know when a child frag is delegated to a new MDS, or when
110 * it is flagged as replicated, so we can direct our requests
111 * accordingly.
112 */
113
114 /*
115 * find/create a frag in the tree
116 */
117 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
118 u32 f)
119 {
120 struct rb_node **p;
121 struct rb_node *parent = NULL;
122 struct ceph_inode_frag *frag;
123 int c;
124
125 p = &ci->i_fragtree.rb_node;
126 while (*p) {
127 parent = *p;
128 frag = rb_entry(parent, struct ceph_inode_frag, node);
129 c = ceph_frag_compare(f, frag->frag);
130 if (c < 0)
131 p = &(*p)->rb_left;
132 else if (c > 0)
133 p = &(*p)->rb_right;
134 else
135 return frag;
136 }
137
138 frag = kmalloc(sizeof(*frag), GFP_NOFS);
139 if (!frag) {
140 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
141 "frag %x\n", &ci->vfs_inode,
142 ceph_vinop(&ci->vfs_inode), f);
143 return ERR_PTR(-ENOMEM);
144 }
145 frag->frag = f;
146 frag->split_by = 0;
147 frag->mds = -1;
148 frag->ndist = 0;
149
150 rb_link_node(&frag->node, parent, p);
151 rb_insert_color(&frag->node, &ci->i_fragtree);
152
153 dout("get_or_create_frag added %llx.%llx frag %x\n",
154 ceph_vinop(&ci->vfs_inode), f);
155 return frag;
156 }
157
158 /*
159 * find a specific frag @f
160 */
161 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
162 {
163 struct rb_node *n = ci->i_fragtree.rb_node;
164
165 while (n) {
166 struct ceph_inode_frag *frag =
167 rb_entry(n, struct ceph_inode_frag, node);
168 int c = ceph_frag_compare(f, frag->frag);
169 if (c < 0)
170 n = n->rb_left;
171 else if (c > 0)
172 n = n->rb_right;
173 else
174 return frag;
175 }
176 return NULL;
177 }
178
179 /*
180 * Choose frag containing the given value @v. If @pfrag is
181 * specified, copy the frag delegation info to the caller if
182 * it is present.
183 */
184 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
185 struct ceph_inode_frag *pfrag, int *found)
186 {
187 u32 t = ceph_frag_make(0, 0);
188 struct ceph_inode_frag *frag;
189 unsigned nway, i;
190 u32 n;
191
192 if (found)
193 *found = 0;
194
195 while (1) {
196 WARN_ON(!ceph_frag_contains_value(t, v));
197 frag = __ceph_find_frag(ci, t);
198 if (!frag)
199 break; /* t is a leaf */
200 if (frag->split_by == 0) {
201 if (pfrag)
202 memcpy(pfrag, frag, sizeof(*pfrag));
203 if (found)
204 *found = 1;
205 break;
206 }
207
208 /* choose child */
209 nway = 1 << frag->split_by;
210 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
211 frag->split_by, nway);
212 for (i = 0; i < nway; i++) {
213 n = ceph_frag_make_child(t, frag->split_by, i);
214 if (ceph_frag_contains_value(n, v)) {
215 t = n;
216 break;
217 }
218 }
219 BUG_ON(i == nway);
220 }
221 dout("choose_frag(%x) = %x\n", v, t);
222
223 return t;
224 }
225
226 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
227 struct ceph_inode_frag *pfrag, int *found)
228 {
229 u32 ret;
230 mutex_lock(&ci->i_fragtree_mutex);
231 ret = __ceph_choose_frag(ci, v, pfrag, found);
232 mutex_unlock(&ci->i_fragtree_mutex);
233 return ret;
234 }
235
236 /*
237 * Process dirfrag (delegation) info from the mds. Include leaf
238 * fragment in tree ONLY if ndist > 0. Otherwise, only
239 * branches/splits are included in i_fragtree)
240 */
241 static int ceph_fill_dirfrag(struct inode *inode,
242 struct ceph_mds_reply_dirfrag *dirinfo)
243 {
244 struct ceph_inode_info *ci = ceph_inode(inode);
245 struct ceph_inode_frag *frag;
246 u32 id = le32_to_cpu(dirinfo->frag);
247 int mds = le32_to_cpu(dirinfo->auth);
248 int ndist = le32_to_cpu(dirinfo->ndist);
249 int diri_auth = -1;
250 int i;
251 int err = 0;
252
253 spin_lock(&ci->i_ceph_lock);
254 if (ci->i_auth_cap)
255 diri_auth = ci->i_auth_cap->mds;
256 spin_unlock(&ci->i_ceph_lock);
257
258 if (mds == -1) /* CDIR_AUTH_PARENT */
259 mds = diri_auth;
260
261 mutex_lock(&ci->i_fragtree_mutex);
262 if (ndist == 0 && mds == diri_auth) {
263 /* no delegation info needed. */
264 frag = __ceph_find_frag(ci, id);
265 if (!frag)
266 goto out;
267 if (frag->split_by == 0) {
268 /* tree leaf, remove */
269 dout("fill_dirfrag removed %llx.%llx frag %x"
270 " (no ref)\n", ceph_vinop(inode), id);
271 rb_erase(&frag->node, &ci->i_fragtree);
272 kfree(frag);
273 } else {
274 /* tree branch, keep and clear */
275 dout("fill_dirfrag cleared %llx.%llx frag %x"
276 " referral\n", ceph_vinop(inode), id);
277 frag->mds = -1;
278 frag->ndist = 0;
279 }
280 goto out;
281 }
282
283
284 /* find/add this frag to store mds delegation info */
285 frag = __get_or_create_frag(ci, id);
286 if (IS_ERR(frag)) {
287 /* this is not the end of the world; we can continue
288 with bad/inaccurate delegation info */
289 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
290 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
291 err = -ENOMEM;
292 goto out;
293 }
294
295 frag->mds = mds;
296 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
297 for (i = 0; i < frag->ndist; i++)
298 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
299 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
300 ceph_vinop(inode), frag->frag, frag->ndist);
301
302 out:
303 mutex_unlock(&ci->i_fragtree_mutex);
304 return err;
305 }
306
307 static int frag_tree_split_cmp(const void *l, const void *r)
308 {
309 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
310 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
311 return ceph_frag_compare(ls->frag, rs->frag);
312 }
313
314 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
315 {
316 if (!frag)
317 return f == ceph_frag_make(0, 0);
318 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
319 return false;
320 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
321 }
322
323 static int ceph_fill_fragtree(struct inode *inode,
324 struct ceph_frag_tree_head *fragtree,
325 struct ceph_mds_reply_dirfrag *dirinfo)
326 {
327 struct ceph_inode_info *ci = ceph_inode(inode);
328 struct ceph_inode_frag *frag, *prev_frag = NULL;
329 struct rb_node *rb_node;
330 unsigned i, split_by, nsplits;
331 u32 id;
332 bool update = false;
333
334 mutex_lock(&ci->i_fragtree_mutex);
335 nsplits = le32_to_cpu(fragtree->nsplits);
336 if (nsplits != ci->i_fragtree_nsplits) {
337 update = true;
338 } else if (nsplits) {
339 i = prandom_u32() % nsplits;
340 id = le32_to_cpu(fragtree->splits[i].frag);
341 if (!__ceph_find_frag(ci, id))
342 update = true;
343 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
344 rb_node = rb_first(&ci->i_fragtree);
345 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
346 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
347 update = true;
348 }
349 if (!update && dirinfo) {
350 id = le32_to_cpu(dirinfo->frag);
351 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
352 update = true;
353 }
354 if (!update)
355 goto out_unlock;
356
357 if (nsplits > 1) {
358 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
359 frag_tree_split_cmp, NULL);
360 }
361
362 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
363 rb_node = rb_first(&ci->i_fragtree);
364 for (i = 0; i < nsplits; i++) {
365 id = le32_to_cpu(fragtree->splits[i].frag);
366 split_by = le32_to_cpu(fragtree->splits[i].by);
367 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
368 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
369 "frag %x split by %d\n", ceph_vinop(inode),
370 i, nsplits, id, split_by);
371 continue;
372 }
373 frag = NULL;
374 while (rb_node) {
375 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
376 if (ceph_frag_compare(frag->frag, id) >= 0) {
377 if (frag->frag != id)
378 frag = NULL;
379 else
380 rb_node = rb_next(rb_node);
381 break;
382 }
383 rb_node = rb_next(rb_node);
384 /* delete stale split/leaf node */
385 if (frag->split_by > 0 ||
386 !is_frag_child(frag->frag, prev_frag)) {
387 rb_erase(&frag->node, &ci->i_fragtree);
388 if (frag->split_by > 0)
389 ci->i_fragtree_nsplits--;
390 kfree(frag);
391 }
392 frag = NULL;
393 }
394 if (!frag) {
395 frag = __get_or_create_frag(ci, id);
396 if (IS_ERR(frag))
397 continue;
398 }
399 if (frag->split_by == 0)
400 ci->i_fragtree_nsplits++;
401 frag->split_by = split_by;
402 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
403 prev_frag = frag;
404 }
405 while (rb_node) {
406 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
407 rb_node = rb_next(rb_node);
408 /* delete stale split/leaf node */
409 if (frag->split_by > 0 ||
410 !is_frag_child(frag->frag, prev_frag)) {
411 rb_erase(&frag->node, &ci->i_fragtree);
412 if (frag->split_by > 0)
413 ci->i_fragtree_nsplits--;
414 kfree(frag);
415 }
416 }
417 out_unlock:
418 mutex_unlock(&ci->i_fragtree_mutex);
419 return 0;
420 }
421
422 /*
423 * initialize a newly allocated inode.
424 */
425 struct inode *ceph_alloc_inode(struct super_block *sb)
426 {
427 struct ceph_inode_info *ci;
428 int i;
429
430 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
431 if (!ci)
432 return NULL;
433
434 dout("alloc_inode %p\n", &ci->vfs_inode);
435
436 spin_lock_init(&ci->i_ceph_lock);
437
438 ci->i_version = 0;
439 ci->i_inline_version = 0;
440 ci->i_time_warp_seq = 0;
441 ci->i_ceph_flags = 0;
442 atomic64_set(&ci->i_ordered_count, 1);
443 atomic64_set(&ci->i_release_count, 1);
444 atomic64_set(&ci->i_complete_seq[0], 0);
445 atomic64_set(&ci->i_complete_seq[1], 0);
446 ci->i_symlink = NULL;
447
448 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
449 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
450
451 ci->i_fragtree = RB_ROOT;
452 mutex_init(&ci->i_fragtree_mutex);
453
454 ci->i_xattrs.blob = NULL;
455 ci->i_xattrs.prealloc_blob = NULL;
456 ci->i_xattrs.dirty = false;
457 ci->i_xattrs.index = RB_ROOT;
458 ci->i_xattrs.count = 0;
459 ci->i_xattrs.names_size = 0;
460 ci->i_xattrs.vals_size = 0;
461 ci->i_xattrs.version = 0;
462 ci->i_xattrs.index_version = 0;
463
464 ci->i_caps = RB_ROOT;
465 ci->i_auth_cap = NULL;
466 ci->i_dirty_caps = 0;
467 ci->i_flushing_caps = 0;
468 INIT_LIST_HEAD(&ci->i_dirty_item);
469 INIT_LIST_HEAD(&ci->i_flushing_item);
470 ci->i_prealloc_cap_flush = NULL;
471 INIT_LIST_HEAD(&ci->i_cap_flush_list);
472 init_waitqueue_head(&ci->i_cap_wq);
473 ci->i_hold_caps_min = 0;
474 ci->i_hold_caps_max = 0;
475 INIT_LIST_HEAD(&ci->i_cap_delay_list);
476 INIT_LIST_HEAD(&ci->i_cap_snaps);
477 ci->i_head_snapc = NULL;
478 ci->i_snap_caps = 0;
479
480 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
481 ci->i_nr_by_mode[i] = 0;
482
483 mutex_init(&ci->i_truncate_mutex);
484 ci->i_truncate_seq = 0;
485 ci->i_truncate_size = 0;
486 ci->i_truncate_pending = 0;
487
488 ci->i_max_size = 0;
489 ci->i_reported_size = 0;
490 ci->i_wanted_max_size = 0;
491 ci->i_requested_max_size = 0;
492
493 ci->i_pin_ref = 0;
494 ci->i_rd_ref = 0;
495 ci->i_rdcache_ref = 0;
496 ci->i_wr_ref = 0;
497 ci->i_wb_ref = 0;
498 ci->i_wrbuffer_ref = 0;
499 ci->i_wrbuffer_ref_head = 0;
500 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_writes);
505 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
506 INIT_LIST_HEAD(&ci->i_unsafe_iops);
507 spin_lock_init(&ci->i_unsafe_lock);
508
509 ci->i_snap_realm = NULL;
510 INIT_LIST_HEAD(&ci->i_snap_realm_item);
511 INIT_LIST_HEAD(&ci->i_snap_flush_item);
512
513 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
514 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
515
516 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
517
518 ceph_fscache_inode_init(ci);
519
520 return &ci->vfs_inode;
521 }
522
523 static void ceph_i_callback(struct rcu_head *head)
524 {
525 struct inode *inode = container_of(head, struct inode, i_rcu);
526 struct ceph_inode_info *ci = ceph_inode(inode);
527
528 kmem_cache_free(ceph_inode_cachep, ci);
529 }
530
531 void ceph_destroy_inode(struct inode *inode)
532 {
533 struct ceph_inode_info *ci = ceph_inode(inode);
534 struct ceph_inode_frag *frag;
535 struct rb_node *n;
536
537 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
538
539 ceph_fscache_unregister_inode_cookie(ci);
540
541 ceph_queue_caps_release(inode);
542
543 /*
544 * we may still have a snap_realm reference if there are stray
545 * caps in i_snap_caps.
546 */
547 if (ci->i_snap_realm) {
548 struct ceph_mds_client *mdsc =
549 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
550 struct ceph_snap_realm *realm = ci->i_snap_realm;
551
552 dout(" dropping residual ref to snap realm %p\n", realm);
553 spin_lock(&realm->inodes_with_caps_lock);
554 list_del_init(&ci->i_snap_realm_item);
555 spin_unlock(&realm->inodes_with_caps_lock);
556 ceph_put_snap_realm(mdsc, realm);
557 }
558
559 kfree(ci->i_symlink);
560 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
561 frag = rb_entry(n, struct ceph_inode_frag, node);
562 rb_erase(n, &ci->i_fragtree);
563 kfree(frag);
564 }
565 ci->i_fragtree_nsplits = 0;
566
567 __ceph_destroy_xattrs(ci);
568 if (ci->i_xattrs.blob)
569 ceph_buffer_put(ci->i_xattrs.blob);
570 if (ci->i_xattrs.prealloc_blob)
571 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
572
573 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
574
575 call_rcu(&inode->i_rcu, ceph_i_callback);
576 }
577
578 int ceph_drop_inode(struct inode *inode)
579 {
580 /*
581 * Positve dentry and corresponding inode are always accompanied
582 * in MDS reply. So no need to keep inode in the cache after
583 * dropping all its aliases.
584 */
585 return 1;
586 }
587
588 void ceph_evict_inode(struct inode *inode)
589 {
590 /* wait unsafe sync writes */
591 ceph_sync_write_wait(inode);
592 truncate_inode_pages_final(&inode->i_data);
593 clear_inode(inode);
594 }
595
596 static inline blkcnt_t calc_inode_blocks(u64 size)
597 {
598 return (size + (1<<9) - 1) >> 9;
599 }
600
601 /*
602 * Helpers to fill in size, ctime, mtime, and atime. We have to be
603 * careful because either the client or MDS may have more up to date
604 * info, depending on which capabilities are held, and whether
605 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
606 * and size are monotonically increasing, except when utimes() or
607 * truncate() increments the corresponding _seq values.)
608 */
609 int ceph_fill_file_size(struct inode *inode, int issued,
610 u32 truncate_seq, u64 truncate_size, u64 size)
611 {
612 struct ceph_inode_info *ci = ceph_inode(inode);
613 int queue_trunc = 0;
614
615 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
616 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
617 dout("size %lld -> %llu\n", inode->i_size, size);
618 if (size > 0 && S_ISDIR(inode->i_mode)) {
619 pr_err("fill_file_size non-zero size for directory\n");
620 size = 0;
621 }
622 i_size_write(inode, size);
623 inode->i_blocks = calc_inode_blocks(size);
624 ci->i_reported_size = size;
625 if (truncate_seq != ci->i_truncate_seq) {
626 dout("truncate_seq %u -> %u\n",
627 ci->i_truncate_seq, truncate_seq);
628 ci->i_truncate_seq = truncate_seq;
629
630 /* the MDS should have revoked these caps */
631 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
632 CEPH_CAP_FILE_RD |
633 CEPH_CAP_FILE_WR |
634 CEPH_CAP_FILE_LAZYIO));
635 /*
636 * If we hold relevant caps, or in the case where we're
637 * not the only client referencing this file and we
638 * don't hold those caps, then we need to check whether
639 * the file is either opened or mmaped
640 */
641 if ((issued & (CEPH_CAP_FILE_CACHE|
642 CEPH_CAP_FILE_BUFFER)) ||
643 mapping_mapped(inode->i_mapping) ||
644 __ceph_caps_file_wanted(ci)) {
645 ci->i_truncate_pending++;
646 queue_trunc = 1;
647 }
648 }
649 }
650 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
651 ci->i_truncate_size != truncate_size) {
652 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
653 truncate_size);
654 ci->i_truncate_size = truncate_size;
655 }
656
657 if (queue_trunc)
658 ceph_fscache_invalidate(inode);
659
660 return queue_trunc;
661 }
662
663 void ceph_fill_file_time(struct inode *inode, int issued,
664 u64 time_warp_seq, struct timespec *ctime,
665 struct timespec *mtime, struct timespec *atime)
666 {
667 struct ceph_inode_info *ci = ceph_inode(inode);
668 int warn = 0;
669
670 if (issued & (CEPH_CAP_FILE_EXCL|
671 CEPH_CAP_FILE_WR|
672 CEPH_CAP_FILE_BUFFER|
673 CEPH_CAP_AUTH_EXCL|
674 CEPH_CAP_XATTR_EXCL)) {
675 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
676 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
677 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
678 ctime->tv_sec, ctime->tv_nsec);
679 inode->i_ctime = *ctime;
680 }
681 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
682 /* the MDS did a utimes() */
683 dout("mtime %ld.%09ld -> %ld.%09ld "
684 "tw %d -> %d\n",
685 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
686 mtime->tv_sec, mtime->tv_nsec,
687 ci->i_time_warp_seq, (int)time_warp_seq);
688
689 inode->i_mtime = *mtime;
690 inode->i_atime = *atime;
691 ci->i_time_warp_seq = time_warp_seq;
692 } else if (time_warp_seq == ci->i_time_warp_seq) {
693 /* nobody did utimes(); take the max */
694 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
695 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
696 inode->i_mtime.tv_sec,
697 inode->i_mtime.tv_nsec,
698 mtime->tv_sec, mtime->tv_nsec);
699 inode->i_mtime = *mtime;
700 }
701 if (timespec_compare(atime, &inode->i_atime) > 0) {
702 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
703 inode->i_atime.tv_sec,
704 inode->i_atime.tv_nsec,
705 atime->tv_sec, atime->tv_nsec);
706 inode->i_atime = *atime;
707 }
708 } else if (issued & CEPH_CAP_FILE_EXCL) {
709 /* we did a utimes(); ignore mds values */
710 } else {
711 warn = 1;
712 }
713 } else {
714 /* we have no write|excl caps; whatever the MDS says is true */
715 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
716 inode->i_ctime = *ctime;
717 inode->i_mtime = *mtime;
718 inode->i_atime = *atime;
719 ci->i_time_warp_seq = time_warp_seq;
720 } else {
721 warn = 1;
722 }
723 }
724 if (warn) /* time_warp_seq shouldn't go backwards */
725 dout("%p mds time_warp_seq %llu < %u\n",
726 inode, time_warp_seq, ci->i_time_warp_seq);
727 }
728
729 /*
730 * Populate an inode based on info from mds. May be called on new or
731 * existing inodes.
732 */
733 static int fill_inode(struct inode *inode, struct page *locked_page,
734 struct ceph_mds_reply_info_in *iinfo,
735 struct ceph_mds_reply_dirfrag *dirinfo,
736 struct ceph_mds_session *session,
737 unsigned long ttl_from, int cap_fmode,
738 struct ceph_cap_reservation *caps_reservation)
739 {
740 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
741 struct ceph_mds_reply_inode *info = iinfo->in;
742 struct ceph_inode_info *ci = ceph_inode(inode);
743 int issued = 0, implemented, new_issued;
744 struct timespec mtime, atime, ctime;
745 struct ceph_buffer *xattr_blob = NULL;
746 struct ceph_string *pool_ns = NULL;
747 struct ceph_cap *new_cap = NULL;
748 int err = 0;
749 bool wake = false;
750 bool queue_trunc = false;
751 bool new_version = false;
752 bool fill_inline = false;
753
754 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
755 inode, ceph_vinop(inode), le64_to_cpu(info->version),
756 ci->i_version);
757
758 /* prealloc new cap struct */
759 if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP)
760 new_cap = ceph_get_cap(mdsc, caps_reservation);
761
762 /*
763 * prealloc xattr data, if it looks like we'll need it. only
764 * if len > 4 (meaning there are actually xattrs; the first 4
765 * bytes are the xattr count).
766 */
767 if (iinfo->xattr_len > 4) {
768 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
769 if (!xattr_blob)
770 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
771 iinfo->xattr_len);
772 }
773
774 if (iinfo->pool_ns_len > 0)
775 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
776 iinfo->pool_ns_len);
777
778 spin_lock(&ci->i_ceph_lock);
779
780 /*
781 * provided version will be odd if inode value is projected,
782 * even if stable. skip the update if we have newer stable
783 * info (ours>=theirs, e.g. due to racing mds replies), unless
784 * we are getting projected (unstable) info (in which case the
785 * version is odd, and we want ours>theirs).
786 * us them
787 * 2 2 skip
788 * 3 2 skip
789 * 3 3 update
790 */
791 if (ci->i_version == 0 ||
792 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
793 le64_to_cpu(info->version) > (ci->i_version & ~1)))
794 new_version = true;
795
796 issued = __ceph_caps_issued(ci, &implemented);
797 issued |= implemented | __ceph_caps_dirty(ci);
798 new_issued = ~issued & le32_to_cpu(info->cap.caps);
799
800 /* update inode */
801 ci->i_version = le64_to_cpu(info->version);
802 inode->i_version++;
803 inode->i_rdev = le32_to_cpu(info->rdev);
804 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
805
806 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
807 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
808 inode->i_mode = le32_to_cpu(info->mode);
809 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
810 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
811 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
812 from_kuid(&init_user_ns, inode->i_uid),
813 from_kgid(&init_user_ns, inode->i_gid));
814 }
815
816 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
817 (issued & CEPH_CAP_LINK_EXCL) == 0)
818 set_nlink(inode, le32_to_cpu(info->nlink));
819
820 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
821 /* be careful with mtime, atime, size */
822 ceph_decode_timespec(&atime, &info->atime);
823 ceph_decode_timespec(&mtime, &info->mtime);
824 ceph_decode_timespec(&ctime, &info->ctime);
825 ceph_fill_file_time(inode, issued,
826 le32_to_cpu(info->time_warp_seq),
827 &ctime, &mtime, &atime);
828 }
829
830 if (new_version ||
831 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
832 s64 old_pool = ci->i_layout.pool_id;
833 struct ceph_string *old_ns;
834
835 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
836 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
837 lockdep_is_held(&ci->i_ceph_lock));
838 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
839
840 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
841 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
842
843 pool_ns = old_ns;
844
845 queue_trunc = ceph_fill_file_size(inode, issued,
846 le32_to_cpu(info->truncate_seq),
847 le64_to_cpu(info->truncate_size),
848 le64_to_cpu(info->size));
849 /* only update max_size on auth cap */
850 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
851 ci->i_max_size != le64_to_cpu(info->max_size)) {
852 dout("max_size %lld -> %llu\n", ci->i_max_size,
853 le64_to_cpu(info->max_size));
854 ci->i_max_size = le64_to_cpu(info->max_size);
855 }
856 }
857
858 /* xattrs */
859 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
860 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
861 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
862 if (ci->i_xattrs.blob)
863 ceph_buffer_put(ci->i_xattrs.blob);
864 ci->i_xattrs.blob = xattr_blob;
865 if (xattr_blob)
866 memcpy(ci->i_xattrs.blob->vec.iov_base,
867 iinfo->xattr_data, iinfo->xattr_len);
868 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
869 ceph_forget_all_cached_acls(inode);
870 xattr_blob = NULL;
871 }
872
873 inode->i_mapping->a_ops = &ceph_aops;
874
875 switch (inode->i_mode & S_IFMT) {
876 case S_IFIFO:
877 case S_IFBLK:
878 case S_IFCHR:
879 case S_IFSOCK:
880 init_special_inode(inode, inode->i_mode, inode->i_rdev);
881 inode->i_op = &ceph_file_iops;
882 break;
883 case S_IFREG:
884 inode->i_op = &ceph_file_iops;
885 inode->i_fop = &ceph_file_fops;
886 break;
887 case S_IFLNK:
888 inode->i_op = &ceph_symlink_iops;
889 if (!ci->i_symlink) {
890 u32 symlen = iinfo->symlink_len;
891 char *sym;
892
893 spin_unlock(&ci->i_ceph_lock);
894
895 if (symlen != i_size_read(inode)) {
896 pr_err("fill_inode %llx.%llx BAD symlink "
897 "size %lld\n", ceph_vinop(inode),
898 i_size_read(inode));
899 i_size_write(inode, symlen);
900 inode->i_blocks = calc_inode_blocks(symlen);
901 }
902
903 err = -ENOMEM;
904 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
905 if (!sym)
906 goto out;
907
908 spin_lock(&ci->i_ceph_lock);
909 if (!ci->i_symlink)
910 ci->i_symlink = sym;
911 else
912 kfree(sym); /* lost a race */
913 }
914 inode->i_link = ci->i_symlink;
915 break;
916 case S_IFDIR:
917 inode->i_op = &ceph_dir_iops;
918 inode->i_fop = &ceph_dir_fops;
919
920 ci->i_dir_layout = iinfo->dir_layout;
921
922 ci->i_files = le64_to_cpu(info->files);
923 ci->i_subdirs = le64_to_cpu(info->subdirs);
924 ci->i_rbytes = le64_to_cpu(info->rbytes);
925 ci->i_rfiles = le64_to_cpu(info->rfiles);
926 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
927 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
928 break;
929 default:
930 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
931 ceph_vinop(inode), inode->i_mode);
932 }
933
934 /* were we issued a capability? */
935 if (info->cap.caps) {
936 if (ceph_snap(inode) == CEPH_NOSNAP) {
937 unsigned caps = le32_to_cpu(info->cap.caps);
938 ceph_add_cap(inode, session,
939 le64_to_cpu(info->cap.cap_id),
940 cap_fmode, caps,
941 le32_to_cpu(info->cap.wanted),
942 le32_to_cpu(info->cap.seq),
943 le32_to_cpu(info->cap.mseq),
944 le64_to_cpu(info->cap.realm),
945 info->cap.flags, &new_cap);
946
947 /* set dir completion flag? */
948 if (S_ISDIR(inode->i_mode) &&
949 ci->i_files == 0 && ci->i_subdirs == 0 &&
950 (caps & CEPH_CAP_FILE_SHARED) &&
951 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
952 !__ceph_dir_is_complete(ci)) {
953 dout(" marking %p complete (empty)\n", inode);
954 i_size_write(inode, 0);
955 __ceph_dir_set_complete(ci,
956 atomic64_read(&ci->i_release_count),
957 atomic64_read(&ci->i_ordered_count));
958 }
959
960 wake = true;
961 } else {
962 dout(" %p got snap_caps %s\n", inode,
963 ceph_cap_string(le32_to_cpu(info->cap.caps)));
964 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
965 if (cap_fmode >= 0)
966 __ceph_get_fmode(ci, cap_fmode);
967 }
968 } else if (cap_fmode >= 0) {
969 pr_warn("mds issued no caps on %llx.%llx\n",
970 ceph_vinop(inode));
971 __ceph_get_fmode(ci, cap_fmode);
972 }
973
974 if (iinfo->inline_version > 0 &&
975 iinfo->inline_version >= ci->i_inline_version) {
976 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
977 ci->i_inline_version = iinfo->inline_version;
978 if (ci->i_inline_version != CEPH_INLINE_NONE &&
979 (locked_page ||
980 (le32_to_cpu(info->cap.caps) & cache_caps)))
981 fill_inline = true;
982 }
983
984 spin_unlock(&ci->i_ceph_lock);
985
986 if (fill_inline)
987 ceph_fill_inline_data(inode, locked_page,
988 iinfo->inline_data, iinfo->inline_len);
989
990 if (wake)
991 wake_up_all(&ci->i_cap_wq);
992
993 /* queue truncate if we saw i_size decrease */
994 if (queue_trunc)
995 ceph_queue_vmtruncate(inode);
996
997 /* populate frag tree */
998 if (S_ISDIR(inode->i_mode))
999 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
1000
1001 /* update delegation info? */
1002 if (dirinfo)
1003 ceph_fill_dirfrag(inode, dirinfo);
1004
1005 err = 0;
1006 out:
1007 if (new_cap)
1008 ceph_put_cap(mdsc, new_cap);
1009 if (xattr_blob)
1010 ceph_buffer_put(xattr_blob);
1011 ceph_put_string(pool_ns);
1012 return err;
1013 }
1014
1015 /*
1016 * caller should hold session s_mutex.
1017 */
1018 static void update_dentry_lease(struct dentry *dentry,
1019 struct ceph_mds_reply_lease *lease,
1020 struct ceph_mds_session *session,
1021 unsigned long from_time)
1022 {
1023 struct ceph_dentry_info *di = ceph_dentry(dentry);
1024 long unsigned duration = le32_to_cpu(lease->duration_ms);
1025 long unsigned ttl = from_time + (duration * HZ) / 1000;
1026 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
1027 struct inode *dir;
1028
1029 /* only track leases on regular dentries */
1030 if (dentry->d_op != &ceph_dentry_ops)
1031 return;
1032
1033 spin_lock(&dentry->d_lock);
1034 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1035 dentry, duration, ttl);
1036
1037 /* make lease_rdcache_gen match directory */
1038 dir = d_inode(dentry->d_parent);
1039 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
1040
1041 if (duration == 0)
1042 goto out_unlock;
1043
1044 if (di->lease_gen == session->s_cap_gen &&
1045 time_before(ttl, di->time))
1046 goto out_unlock; /* we already have a newer lease. */
1047
1048 if (di->lease_session && di->lease_session != session)
1049 goto out_unlock;
1050
1051 ceph_dentry_lru_touch(dentry);
1052
1053 if (!di->lease_session)
1054 di->lease_session = ceph_get_mds_session(session);
1055 di->lease_gen = session->s_cap_gen;
1056 di->lease_seq = le32_to_cpu(lease->seq);
1057 di->lease_renew_after = half_ttl;
1058 di->lease_renew_from = 0;
1059 di->time = ttl;
1060 out_unlock:
1061 spin_unlock(&dentry->d_lock);
1062 return;
1063 }
1064
1065 /*
1066 * splice a dentry to an inode.
1067 * caller must hold directory i_mutex for this to be safe.
1068 */
1069 static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
1070 {
1071 struct dentry *realdn;
1072
1073 BUG_ON(d_inode(dn));
1074
1075 /* dn must be unhashed */
1076 if (!d_unhashed(dn))
1077 d_drop(dn);
1078 realdn = d_splice_alias(in, dn);
1079 if (IS_ERR(realdn)) {
1080 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1081 PTR_ERR(realdn), dn, in, ceph_vinop(in));
1082 dn = realdn; /* note realdn contains the error */
1083 goto out;
1084 } else if (realdn) {
1085 dout("dn %p (%d) spliced with %p (%d) "
1086 "inode %p ino %llx.%llx\n",
1087 dn, d_count(dn),
1088 realdn, d_count(realdn),
1089 d_inode(realdn), ceph_vinop(d_inode(realdn)));
1090 dput(dn);
1091 dn = realdn;
1092 } else {
1093 BUG_ON(!ceph_dentry(dn));
1094 dout("dn %p attached to %p ino %llx.%llx\n",
1095 dn, d_inode(dn), ceph_vinop(d_inode(dn)));
1096 }
1097 out:
1098 return dn;
1099 }
1100
1101 /*
1102 * Incorporate results into the local cache. This is either just
1103 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1104 * after a lookup).
1105 *
1106 * A reply may contain
1107 * a directory inode along with a dentry.
1108 * and/or a target inode
1109 *
1110 * Called with snap_rwsem (read).
1111 */
1112 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
1113 struct ceph_mds_session *session)
1114 {
1115 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1116 struct inode *in = NULL;
1117 struct ceph_vino vino;
1118 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1119 int err = 0;
1120
1121 dout("fill_trace %p is_dentry %d is_target %d\n", req,
1122 rinfo->head->is_dentry, rinfo->head->is_target);
1123
1124 #if 0
1125 /*
1126 * Debugging hook:
1127 *
1128 * If we resend completed ops to a recovering mds, we get no
1129 * trace. Since that is very rare, pretend this is the case
1130 * to ensure the 'no trace' handlers in the callers behave.
1131 *
1132 * Fill in inodes unconditionally to avoid breaking cap
1133 * invariants.
1134 */
1135 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
1136 pr_info("fill_trace faking empty trace on %lld %s\n",
1137 req->r_tid, ceph_mds_op_name(rinfo->head->op));
1138 if (rinfo->head->is_dentry) {
1139 rinfo->head->is_dentry = 0;
1140 err = fill_inode(req->r_locked_dir,
1141 &rinfo->diri, rinfo->dirfrag,
1142 session, req->r_request_started, -1);
1143 }
1144 if (rinfo->head->is_target) {
1145 rinfo->head->is_target = 0;
1146 ininfo = rinfo->targeti.in;
1147 vino.ino = le64_to_cpu(ininfo->ino);
1148 vino.snap = le64_to_cpu(ininfo->snapid);
1149 in = ceph_get_inode(sb, vino);
1150 err = fill_inode(in, &rinfo->targeti, NULL,
1151 session, req->r_request_started,
1152 req->r_fmode);
1153 iput(in);
1154 }
1155 }
1156 #endif
1157
1158 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1159 dout("fill_trace reply is empty!\n");
1160 if (rinfo->head->result == 0 && req->r_locked_dir)
1161 ceph_invalidate_dir_request(req);
1162 return 0;
1163 }
1164
1165 if (rinfo->head->is_dentry) {
1166 struct inode *dir = req->r_locked_dir;
1167
1168 if (dir) {
1169 err = fill_inode(dir, NULL,
1170 &rinfo->diri, rinfo->dirfrag,
1171 session, req->r_request_started, -1,
1172 &req->r_caps_reservation);
1173 if (err < 0)
1174 goto done;
1175 } else {
1176 WARN_ON_ONCE(1);
1177 }
1178
1179 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
1180 struct qstr dname;
1181 struct dentry *dn, *parent;
1182
1183 BUG_ON(!rinfo->head->is_target);
1184 BUG_ON(req->r_dentry);
1185
1186 parent = d_find_any_alias(dir);
1187 BUG_ON(!parent);
1188
1189 dname.name = rinfo->dname;
1190 dname.len = rinfo->dname_len;
1191 dname.hash = full_name_hash(parent, dname.name, dname.len);
1192 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1193 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1194 retry_lookup:
1195 dn = d_lookup(parent, &dname);
1196 dout("d_lookup on parent=%p name=%.*s got %p\n",
1197 parent, dname.len, dname.name, dn);
1198
1199 if (!dn) {
1200 dn = d_alloc(parent, &dname);
1201 dout("d_alloc %p '%.*s' = %p\n", parent,
1202 dname.len, dname.name, dn);
1203 if (dn == NULL) {
1204 dput(parent);
1205 err = -ENOMEM;
1206 goto done;
1207 }
1208 err = ceph_init_dentry(dn);
1209 if (err < 0) {
1210 dput(dn);
1211 dput(parent);
1212 goto done;
1213 }
1214 } else if (d_really_is_positive(dn) &&
1215 (ceph_ino(d_inode(dn)) != vino.ino ||
1216 ceph_snap(d_inode(dn)) != vino.snap)) {
1217 dout(" dn %p points to wrong inode %p\n",
1218 dn, d_inode(dn));
1219 d_delete(dn);
1220 dput(dn);
1221 goto retry_lookup;
1222 }
1223
1224 req->r_dentry = dn;
1225 dput(parent);
1226 }
1227 }
1228
1229 if (rinfo->head->is_target) {
1230 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1231 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1232
1233 in = ceph_get_inode(sb, vino);
1234 if (IS_ERR(in)) {
1235 err = PTR_ERR(in);
1236 goto done;
1237 }
1238 req->r_target_inode = in;
1239
1240 err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
1241 session, req->r_request_started,
1242 (!req->r_aborted && rinfo->head->result == 0) ?
1243 req->r_fmode : -1,
1244 &req->r_caps_reservation);
1245 if (err < 0) {
1246 pr_err("fill_inode badness %p %llx.%llx\n",
1247 in, ceph_vinop(in));
1248 goto done;
1249 }
1250 }
1251
1252 /*
1253 * ignore null lease/binding on snapdir ENOENT, or else we
1254 * will have trouble splicing in the virtual snapdir later
1255 */
1256 if (rinfo->head->is_dentry && !req->r_aborted &&
1257 req->r_locked_dir &&
1258 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1259 fsc->mount_options->snapdir_name,
1260 req->r_dentry->d_name.len))) {
1261 /*
1262 * lookup link rename : null -> possibly existing inode
1263 * mknod symlink mkdir : null -> new inode
1264 * unlink : linked -> null
1265 */
1266 struct inode *dir = req->r_locked_dir;
1267 struct dentry *dn = req->r_dentry;
1268 bool have_dir_cap, have_lease;
1269
1270 BUG_ON(!dn);
1271 BUG_ON(!dir);
1272 BUG_ON(d_inode(dn->d_parent) != dir);
1273 BUG_ON(ceph_ino(dir) !=
1274 le64_to_cpu(rinfo->diri.in->ino));
1275 BUG_ON(ceph_snap(dir) !=
1276 le64_to_cpu(rinfo->diri.in->snapid));
1277
1278 /* do we have a lease on the whole dir? */
1279 have_dir_cap =
1280 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1281 CEPH_CAP_FILE_SHARED);
1282
1283 /* do we have a dn lease? */
1284 have_lease = have_dir_cap ||
1285 le32_to_cpu(rinfo->dlease->duration_ms);
1286 if (!have_lease)
1287 dout("fill_trace no dentry lease or dir cap\n");
1288
1289 /* rename? */
1290 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1291 struct inode *olddir = req->r_old_dentry_dir;
1292 BUG_ON(!olddir);
1293
1294 dout(" src %p '%pd' dst %p '%pd'\n",
1295 req->r_old_dentry,
1296 req->r_old_dentry,
1297 dn, dn);
1298 dout("fill_trace doing d_move %p -> %p\n",
1299 req->r_old_dentry, dn);
1300
1301 /* d_move screws up sibling dentries' offsets */
1302 ceph_dir_clear_ordered(dir);
1303 ceph_dir_clear_ordered(olddir);
1304
1305 d_move(req->r_old_dentry, dn);
1306 dout(" src %p '%pd' dst %p '%pd'\n",
1307 req->r_old_dentry,
1308 req->r_old_dentry,
1309 dn, dn);
1310
1311 /* ensure target dentry is invalidated, despite
1312 rehashing bug in vfs_rename_dir */
1313 ceph_invalidate_dentry_lease(dn);
1314
1315 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1316 ceph_dentry(req->r_old_dentry)->offset);
1317
1318 dn = req->r_old_dentry; /* use old_dentry */
1319 }
1320
1321 /* null dentry? */
1322 if (!rinfo->head->is_target) {
1323 dout("fill_trace null dentry\n");
1324 if (d_really_is_positive(dn)) {
1325 ceph_dir_clear_ordered(dir);
1326 dout("d_delete %p\n", dn);
1327 d_delete(dn);
1328 } else {
1329 if (have_lease && d_unhashed(dn))
1330 d_add(dn, NULL);
1331 update_dentry_lease(dn, rinfo->dlease,
1332 session,
1333 req->r_request_started);
1334 }
1335 goto done;
1336 }
1337
1338 /* attach proper inode */
1339 if (d_really_is_negative(dn)) {
1340 ceph_dir_clear_ordered(dir);
1341 ihold(in);
1342 dn = splice_dentry(dn, in);
1343 if (IS_ERR(dn)) {
1344 err = PTR_ERR(dn);
1345 goto done;
1346 }
1347 req->r_dentry = dn; /* may have spliced */
1348 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
1349 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1350 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1351 ceph_vinop(in));
1352 d_invalidate(dn);
1353 have_lease = false;
1354 }
1355
1356 if (have_lease)
1357 update_dentry_lease(dn, rinfo->dlease, session,
1358 req->r_request_started);
1359 dout(" final dn %p\n", dn);
1360 } else if (!req->r_aborted &&
1361 (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1362 req->r_op == CEPH_MDS_OP_MKSNAP)) {
1363 struct dentry *dn = req->r_dentry;
1364 struct inode *dir = req->r_locked_dir;
1365
1366 /* fill out a snapdir LOOKUPSNAP dentry */
1367 BUG_ON(!dn);
1368 BUG_ON(!dir);
1369 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
1370 dout(" linking snapped dir %p to dn %p\n", in, dn);
1371 ceph_dir_clear_ordered(dir);
1372 ihold(in);
1373 dn = splice_dentry(dn, in);
1374 if (IS_ERR(dn)) {
1375 err = PTR_ERR(dn);
1376 goto done;
1377 }
1378 req->r_dentry = dn; /* may have spliced */
1379 }
1380 done:
1381 dout("fill_trace done err=%d\n", err);
1382 return err;
1383 }
1384
1385 /*
1386 * Prepopulate our cache with readdir results, leases, etc.
1387 */
1388 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1389 struct ceph_mds_session *session)
1390 {
1391 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1392 int i, err = 0;
1393
1394 for (i = 0; i < rinfo->dir_nr; i++) {
1395 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1396 struct ceph_vino vino;
1397 struct inode *in;
1398 int rc;
1399
1400 vino.ino = le64_to_cpu(rde->inode.in->ino);
1401 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1402
1403 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1404 if (IS_ERR(in)) {
1405 err = PTR_ERR(in);
1406 dout("new_inode badness got %d\n", err);
1407 continue;
1408 }
1409 rc = fill_inode(in, NULL, &rde->inode, NULL, session,
1410 req->r_request_started, -1,
1411 &req->r_caps_reservation);
1412 if (rc < 0) {
1413 pr_err("fill_inode badness on %p got %d\n", in, rc);
1414 err = rc;
1415 }
1416 iput(in);
1417 }
1418
1419 return err;
1420 }
1421
1422 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1423 {
1424 if (ctl->page) {
1425 kunmap(ctl->page);
1426 put_page(ctl->page);
1427 ctl->page = NULL;
1428 }
1429 }
1430
1431 static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1432 struct ceph_readdir_cache_control *ctl,
1433 struct ceph_mds_request *req)
1434 {
1435 struct ceph_inode_info *ci = ceph_inode(dir);
1436 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
1437 unsigned idx = ctl->index % nsize;
1438 pgoff_t pgoff = ctl->index / nsize;
1439
1440 if (!ctl->page || pgoff != page_index(ctl->page)) {
1441 ceph_readdir_cache_release(ctl);
1442 if (idx == 0)
1443 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1444 else
1445 ctl->page = find_lock_page(&dir->i_data, pgoff);
1446 if (!ctl->page) {
1447 ctl->index = -1;
1448 return idx == 0 ? -ENOMEM : 0;
1449 }
1450 /* reading/filling the cache are serialized by
1451 * i_mutex, no need to use page lock */
1452 unlock_page(ctl->page);
1453 ctl->dentries = kmap(ctl->page);
1454 if (idx == 0)
1455 memset(ctl->dentries, 0, PAGE_SIZE);
1456 }
1457
1458 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1459 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1460 dout("readdir cache dn %p idx %d\n", dn, ctl->index);
1461 ctl->dentries[idx] = dn;
1462 ctl->index++;
1463 } else {
1464 dout("disable readdir cache\n");
1465 ctl->index = -1;
1466 }
1467 return 0;
1468 }
1469
1470 int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1471 struct ceph_mds_session *session)
1472 {
1473 struct dentry *parent = req->r_dentry;
1474 struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
1475 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1476 struct qstr dname;
1477 struct dentry *dn;
1478 struct inode *in;
1479 int err = 0, skipped = 0, ret, i;
1480 struct inode *snapdir = NULL;
1481 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1482 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1483 u32 last_hash = 0;
1484 u32 fpos_offset;
1485 struct ceph_readdir_cache_control cache_ctl = {};
1486
1487 if (req->r_aborted)
1488 return readdir_prepopulate_inodes_only(req, session);
1489
1490 if (rinfo->hash_order && req->r_path2) {
1491 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1492 req->r_path2, strlen(req->r_path2));
1493 last_hash = ceph_frag_value(last_hash);
1494 }
1495
1496 if (rinfo->dir_dir &&
1497 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1498 dout("readdir_prepopulate got new frag %x -> %x\n",
1499 frag, le32_to_cpu(rinfo->dir_dir->frag));
1500 frag = le32_to_cpu(rinfo->dir_dir->frag);
1501 if (!rinfo->hash_order)
1502 req->r_readdir_offset = 2;
1503 }
1504
1505 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1506 snapdir = ceph_get_snapdir(d_inode(parent));
1507 parent = d_find_alias(snapdir);
1508 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1509 rinfo->dir_nr, parent);
1510 } else {
1511 dout("readdir_prepopulate %d items under dn %p\n",
1512 rinfo->dir_nr, parent);
1513 if (rinfo->dir_dir)
1514 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
1515 }
1516
1517 if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2) {
1518 /* note dir version at start of readdir so we can tell
1519 * if any dentries get dropped */
1520 req->r_dir_release_cnt = atomic64_read(&ci->i_release_count);
1521 req->r_dir_ordered_cnt = atomic64_read(&ci->i_ordered_count);
1522 req->r_readdir_cache_idx = 0;
1523 }
1524
1525 cache_ctl.index = req->r_readdir_cache_idx;
1526 fpos_offset = req->r_readdir_offset;
1527
1528 /* FIXME: release caps/leases if error occurs */
1529 for (i = 0; i < rinfo->dir_nr; i++) {
1530 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1531 struct ceph_vino vino;
1532
1533 dname.name = rde->name;
1534 dname.len = rde->name_len;
1535 dname.hash = full_name_hash(parent, dname.name, dname.len);
1536
1537 vino.ino = le64_to_cpu(rde->inode.in->ino);
1538 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1539
1540 if (rinfo->hash_order) {
1541 u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1542 rde->name, rde->name_len);
1543 hash = ceph_frag_value(hash);
1544 if (hash != last_hash)
1545 fpos_offset = 2;
1546 last_hash = hash;
1547 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1548 } else {
1549 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1550 }
1551
1552 retry_lookup:
1553 dn = d_lookup(parent, &dname);
1554 dout("d_lookup on parent=%p name=%.*s got %p\n",
1555 parent, dname.len, dname.name, dn);
1556
1557 if (!dn) {
1558 dn = d_alloc(parent, &dname);
1559 dout("d_alloc %p '%.*s' = %p\n", parent,
1560 dname.len, dname.name, dn);
1561 if (dn == NULL) {
1562 dout("d_alloc badness\n");
1563 err = -ENOMEM;
1564 goto out;
1565 }
1566 ret = ceph_init_dentry(dn);
1567 if (ret < 0) {
1568 dput(dn);
1569 err = ret;
1570 goto out;
1571 }
1572 } else if (d_really_is_positive(dn) &&
1573 (ceph_ino(d_inode(dn)) != vino.ino ||
1574 ceph_snap(d_inode(dn)) != vino.snap)) {
1575 dout(" dn %p points to wrong inode %p\n",
1576 dn, d_inode(dn));
1577 d_delete(dn);
1578 dput(dn);
1579 goto retry_lookup;
1580 }
1581
1582 /* inode */
1583 if (d_really_is_positive(dn)) {
1584 in = d_inode(dn);
1585 } else {
1586 in = ceph_get_inode(parent->d_sb, vino);
1587 if (IS_ERR(in)) {
1588 dout("new_inode badness\n");
1589 d_drop(dn);
1590 dput(dn);
1591 err = PTR_ERR(in);
1592 goto out;
1593 }
1594 }
1595
1596 ret = fill_inode(in, NULL, &rde->inode, NULL, session,
1597 req->r_request_started, -1,
1598 &req->r_caps_reservation);
1599 if (ret < 0) {
1600 pr_err("fill_inode badness on %p\n", in);
1601 if (d_really_is_negative(dn))
1602 iput(in);
1603 d_drop(dn);
1604 err = ret;
1605 goto next_item;
1606 }
1607
1608 if (d_really_is_negative(dn)) {
1609 struct dentry *realdn;
1610
1611 if (ceph_security_xattr_deadlock(in)) {
1612 dout(" skip splicing dn %p to inode %p"
1613 " (security xattr deadlock)\n", dn, in);
1614 iput(in);
1615 skipped++;
1616 goto next_item;
1617 }
1618
1619 realdn = splice_dentry(dn, in);
1620 if (IS_ERR(realdn)) {
1621 err = PTR_ERR(realdn);
1622 d_drop(dn);
1623 dn = NULL;
1624 goto next_item;
1625 }
1626 dn = realdn;
1627 }
1628
1629 ceph_dentry(dn)->offset = rde->offset;
1630
1631 update_dentry_lease(dn, rde->lease, req->r_session,
1632 req->r_request_started);
1633
1634 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
1635 ret = fill_readdir_cache(d_inode(parent), dn,
1636 &cache_ctl, req);
1637 if (ret < 0)
1638 err = ret;
1639 }
1640 next_item:
1641 if (dn)
1642 dput(dn);
1643 }
1644 out:
1645 if (err == 0 && skipped == 0) {
1646 req->r_did_prepopulate = true;
1647 req->r_readdir_cache_idx = cache_ctl.index;
1648 }
1649 ceph_readdir_cache_release(&cache_ctl);
1650 if (snapdir) {
1651 iput(snapdir);
1652 dput(parent);
1653 }
1654 dout("readdir_prepopulate done\n");
1655 return err;
1656 }
1657
1658 int ceph_inode_set_size(struct inode *inode, loff_t size)
1659 {
1660 struct ceph_inode_info *ci = ceph_inode(inode);
1661 int ret = 0;
1662
1663 spin_lock(&ci->i_ceph_lock);
1664 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1665 i_size_write(inode, size);
1666 inode->i_blocks = calc_inode_blocks(size);
1667
1668 /* tell the MDS if we are approaching max_size */
1669 if ((size << 1) >= ci->i_max_size &&
1670 (ci->i_reported_size << 1) < ci->i_max_size)
1671 ret = 1;
1672
1673 spin_unlock(&ci->i_ceph_lock);
1674 return ret;
1675 }
1676
1677 /*
1678 * Write back inode data in a worker thread. (This can't be done
1679 * in the message handler context.)
1680 */
1681 void ceph_queue_writeback(struct inode *inode)
1682 {
1683 ihold(inode);
1684 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1685 &ceph_inode(inode)->i_wb_work)) {
1686 dout("ceph_queue_writeback %p\n", inode);
1687 } else {
1688 dout("ceph_queue_writeback %p failed\n", inode);
1689 iput(inode);
1690 }
1691 }
1692
1693 static void ceph_writeback_work(struct work_struct *work)
1694 {
1695 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1696 i_wb_work);
1697 struct inode *inode = &ci->vfs_inode;
1698
1699 dout("writeback %p\n", inode);
1700 filemap_fdatawrite(&inode->i_data);
1701 iput(inode);
1702 }
1703
1704 /*
1705 * queue an async invalidation
1706 */
1707 void ceph_queue_invalidate(struct inode *inode)
1708 {
1709 ihold(inode);
1710 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1711 &ceph_inode(inode)->i_pg_inv_work)) {
1712 dout("ceph_queue_invalidate %p\n", inode);
1713 } else {
1714 dout("ceph_queue_invalidate %p failed\n", inode);
1715 iput(inode);
1716 }
1717 }
1718
1719 /*
1720 * Invalidate inode pages in a worker thread. (This can't be done
1721 * in the message handler context.)
1722 */
1723 static void ceph_invalidate_work(struct work_struct *work)
1724 {
1725 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1726 i_pg_inv_work);
1727 struct inode *inode = &ci->vfs_inode;
1728 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1729 u32 orig_gen;
1730 int check = 0;
1731
1732 mutex_lock(&ci->i_truncate_mutex);
1733
1734 if (ACCESS_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
1735 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1736 inode, ceph_ino(inode));
1737 mapping_set_error(inode->i_mapping, -EIO);
1738 truncate_pagecache(inode, 0);
1739 mutex_unlock(&ci->i_truncate_mutex);
1740 goto out;
1741 }
1742
1743 spin_lock(&ci->i_ceph_lock);
1744 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1745 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1746 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1747 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1748 check = 1;
1749 spin_unlock(&ci->i_ceph_lock);
1750 mutex_unlock(&ci->i_truncate_mutex);
1751 goto out;
1752 }
1753 orig_gen = ci->i_rdcache_gen;
1754 spin_unlock(&ci->i_ceph_lock);
1755
1756 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
1757 pr_err("invalidate_pages %p fails\n", inode);
1758 }
1759
1760 spin_lock(&ci->i_ceph_lock);
1761 if (orig_gen == ci->i_rdcache_gen &&
1762 orig_gen == ci->i_rdcache_revoking) {
1763 dout("invalidate_pages %p gen %d successful\n", inode,
1764 ci->i_rdcache_gen);
1765 ci->i_rdcache_revoking--;
1766 check = 1;
1767 } else {
1768 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1769 inode, orig_gen, ci->i_rdcache_gen,
1770 ci->i_rdcache_revoking);
1771 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1772 check = 1;
1773 }
1774 spin_unlock(&ci->i_ceph_lock);
1775 mutex_unlock(&ci->i_truncate_mutex);
1776 out:
1777 if (check)
1778 ceph_check_caps(ci, 0, NULL);
1779 iput(inode);
1780 }
1781
1782
1783 /*
1784 * called by trunc_wq;
1785 *
1786 * We also truncate in a separate thread as well.
1787 */
1788 static void ceph_vmtruncate_work(struct work_struct *work)
1789 {
1790 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1791 i_vmtruncate_work);
1792 struct inode *inode = &ci->vfs_inode;
1793
1794 dout("vmtruncate_work %p\n", inode);
1795 __ceph_do_pending_vmtruncate(inode);
1796 iput(inode);
1797 }
1798
1799 /*
1800 * Queue an async vmtruncate. If we fail to queue work, we will handle
1801 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1802 */
1803 void ceph_queue_vmtruncate(struct inode *inode)
1804 {
1805 struct ceph_inode_info *ci = ceph_inode(inode);
1806
1807 ihold(inode);
1808
1809 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
1810 &ci->i_vmtruncate_work)) {
1811 dout("ceph_queue_vmtruncate %p\n", inode);
1812 } else {
1813 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1814 inode, ci->i_truncate_pending);
1815 iput(inode);
1816 }
1817 }
1818
1819 /*
1820 * Make sure any pending truncation is applied before doing anything
1821 * that may depend on it.
1822 */
1823 void __ceph_do_pending_vmtruncate(struct inode *inode)
1824 {
1825 struct ceph_inode_info *ci = ceph_inode(inode);
1826 u64 to;
1827 int wrbuffer_refs, finish = 0;
1828
1829 mutex_lock(&ci->i_truncate_mutex);
1830 retry:
1831 spin_lock(&ci->i_ceph_lock);
1832 if (ci->i_truncate_pending == 0) {
1833 dout("__do_pending_vmtruncate %p none pending\n", inode);
1834 spin_unlock(&ci->i_ceph_lock);
1835 mutex_unlock(&ci->i_truncate_mutex);
1836 return;
1837 }
1838
1839 /*
1840 * make sure any dirty snapped pages are flushed before we
1841 * possibly truncate them.. so write AND block!
1842 */
1843 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1844 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1845 inode);
1846 spin_unlock(&ci->i_ceph_lock);
1847 filemap_write_and_wait_range(&inode->i_data, 0,
1848 inode->i_sb->s_maxbytes);
1849 goto retry;
1850 }
1851
1852 /* there should be no reader or writer */
1853 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1854
1855 to = ci->i_truncate_size;
1856 wrbuffer_refs = ci->i_wrbuffer_ref;
1857 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1858 ci->i_truncate_pending, to);
1859 spin_unlock(&ci->i_ceph_lock);
1860
1861 truncate_pagecache(inode, to);
1862
1863 spin_lock(&ci->i_ceph_lock);
1864 if (to == ci->i_truncate_size) {
1865 ci->i_truncate_pending = 0;
1866 finish = 1;
1867 }
1868 spin_unlock(&ci->i_ceph_lock);
1869 if (!finish)
1870 goto retry;
1871
1872 mutex_unlock(&ci->i_truncate_mutex);
1873
1874 if (wrbuffer_refs == 0)
1875 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1876
1877 wake_up_all(&ci->i_cap_wq);
1878 }
1879
1880 /*
1881 * symlinks
1882 */
1883 static const struct inode_operations ceph_symlink_iops = {
1884 .readlink = generic_readlink,
1885 .get_link = simple_get_link,
1886 .setattr = ceph_setattr,
1887 .getattr = ceph_getattr,
1888 .setxattr = generic_setxattr,
1889 .getxattr = generic_getxattr,
1890 .listxattr = ceph_listxattr,
1891 .removexattr = generic_removexattr,
1892 };
1893
1894 int __ceph_setattr(struct inode *inode, struct iattr *attr)
1895 {
1896 struct ceph_inode_info *ci = ceph_inode(inode);
1897 const unsigned int ia_valid = attr->ia_valid;
1898 struct ceph_mds_request *req;
1899 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
1900 struct ceph_cap_flush *prealloc_cf;
1901 int issued;
1902 int release = 0, dirtied = 0;
1903 int mask = 0;
1904 int err = 0;
1905 int inode_dirty_flags = 0;
1906 bool lock_snap_rwsem = false;
1907
1908 if (ceph_snap(inode) != CEPH_NOSNAP)
1909 return -EROFS;
1910
1911 err = inode_change_ok(inode, attr);
1912 if (err != 0)
1913 return err;
1914
1915 prealloc_cf = ceph_alloc_cap_flush();
1916 if (!prealloc_cf)
1917 return -ENOMEM;
1918
1919 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1920 USE_AUTH_MDS);
1921 if (IS_ERR(req)) {
1922 ceph_free_cap_flush(prealloc_cf);
1923 return PTR_ERR(req);
1924 }
1925
1926 spin_lock(&ci->i_ceph_lock);
1927 issued = __ceph_caps_issued(ci, NULL);
1928
1929 if (!ci->i_head_snapc &&
1930 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
1931 lock_snap_rwsem = true;
1932 if (!down_read_trylock(&mdsc->snap_rwsem)) {
1933 spin_unlock(&ci->i_ceph_lock);
1934 down_read(&mdsc->snap_rwsem);
1935 spin_lock(&ci->i_ceph_lock);
1936 issued = __ceph_caps_issued(ci, NULL);
1937 }
1938 }
1939
1940 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1941
1942 if (ia_valid & ATTR_UID) {
1943 dout("setattr %p uid %d -> %d\n", inode,
1944 from_kuid(&init_user_ns, inode->i_uid),
1945 from_kuid(&init_user_ns, attr->ia_uid));
1946 if (issued & CEPH_CAP_AUTH_EXCL) {
1947 inode->i_uid = attr->ia_uid;
1948 dirtied |= CEPH_CAP_AUTH_EXCL;
1949 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1950 !uid_eq(attr->ia_uid, inode->i_uid)) {
1951 req->r_args.setattr.uid = cpu_to_le32(
1952 from_kuid(&init_user_ns, attr->ia_uid));
1953 mask |= CEPH_SETATTR_UID;
1954 release |= CEPH_CAP_AUTH_SHARED;
1955 }
1956 }
1957 if (ia_valid & ATTR_GID) {
1958 dout("setattr %p gid %d -> %d\n", inode,
1959 from_kgid(&init_user_ns, inode->i_gid),
1960 from_kgid(&init_user_ns, attr->ia_gid));
1961 if (issued & CEPH_CAP_AUTH_EXCL) {
1962 inode->i_gid = attr->ia_gid;
1963 dirtied |= CEPH_CAP_AUTH_EXCL;
1964 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1965 !gid_eq(attr->ia_gid, inode->i_gid)) {
1966 req->r_args.setattr.gid = cpu_to_le32(
1967 from_kgid(&init_user_ns, attr->ia_gid));
1968 mask |= CEPH_SETATTR_GID;
1969 release |= CEPH_CAP_AUTH_SHARED;
1970 }
1971 }
1972 if (ia_valid & ATTR_MODE) {
1973 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1974 attr->ia_mode);
1975 if (issued & CEPH_CAP_AUTH_EXCL) {
1976 inode->i_mode = attr->ia_mode;
1977 dirtied |= CEPH_CAP_AUTH_EXCL;
1978 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1979 attr->ia_mode != inode->i_mode) {
1980 inode->i_mode = attr->ia_mode;
1981 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1982 mask |= CEPH_SETATTR_MODE;
1983 release |= CEPH_CAP_AUTH_SHARED;
1984 }
1985 }
1986
1987 if (ia_valid & ATTR_ATIME) {
1988 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1989 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1990 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1991 if (issued & CEPH_CAP_FILE_EXCL) {
1992 ci->i_time_warp_seq++;
1993 inode->i_atime = attr->ia_atime;
1994 dirtied |= CEPH_CAP_FILE_EXCL;
1995 } else if ((issued & CEPH_CAP_FILE_WR) &&
1996 timespec_compare(&inode->i_atime,
1997 &attr->ia_atime) < 0) {
1998 inode->i_atime = attr->ia_atime;
1999 dirtied |= CEPH_CAP_FILE_WR;
2000 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2001 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
2002 ceph_encode_timespec(&req->r_args.setattr.atime,
2003 &attr->ia_atime);
2004 mask |= CEPH_SETATTR_ATIME;
2005 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
2006 CEPH_CAP_FILE_WR;
2007 }
2008 }
2009 if (ia_valid & ATTR_MTIME) {
2010 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
2011 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
2012 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
2013 if (issued & CEPH_CAP_FILE_EXCL) {
2014 ci->i_time_warp_seq++;
2015 inode->i_mtime = attr->ia_mtime;
2016 dirtied |= CEPH_CAP_FILE_EXCL;
2017 } else if ((issued & CEPH_CAP_FILE_WR) &&
2018 timespec_compare(&inode->i_mtime,
2019 &attr->ia_mtime) < 0) {
2020 inode->i_mtime = attr->ia_mtime;
2021 dirtied |= CEPH_CAP_FILE_WR;
2022 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2023 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
2024 ceph_encode_timespec(&req->r_args.setattr.mtime,
2025 &attr->ia_mtime);
2026 mask |= CEPH_SETATTR_MTIME;
2027 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
2028 CEPH_CAP_FILE_WR;
2029 }
2030 }
2031 if (ia_valid & ATTR_SIZE) {
2032 dout("setattr %p size %lld -> %lld\n", inode,
2033 inode->i_size, attr->ia_size);
2034 if ((issued & CEPH_CAP_FILE_EXCL) &&
2035 attr->ia_size > inode->i_size) {
2036 i_size_write(inode, attr->ia_size);
2037 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2038 inode->i_ctime = attr->ia_ctime;
2039 ci->i_reported_size = attr->ia_size;
2040 dirtied |= CEPH_CAP_FILE_EXCL;
2041 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2042 attr->ia_size != inode->i_size) {
2043 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2044 req->r_args.setattr.old_size =
2045 cpu_to_le64(inode->i_size);
2046 mask |= CEPH_SETATTR_SIZE;
2047 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
2048 CEPH_CAP_FILE_WR;
2049 }
2050 }
2051
2052 /* these do nothing */
2053 if (ia_valid & ATTR_CTIME) {
2054 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2055 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
2056 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
2057 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
2058 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2059 only ? "ctime only" : "ignored");
2060 inode->i_ctime = attr->ia_ctime;
2061 if (only) {
2062 /*
2063 * if kernel wants to dirty ctime but nothing else,
2064 * we need to choose a cap to dirty under, or do
2065 * a almost-no-op setattr
2066 */
2067 if (issued & CEPH_CAP_AUTH_EXCL)
2068 dirtied |= CEPH_CAP_AUTH_EXCL;
2069 else if (issued & CEPH_CAP_FILE_EXCL)
2070 dirtied |= CEPH_CAP_FILE_EXCL;
2071 else if (issued & CEPH_CAP_XATTR_EXCL)
2072 dirtied |= CEPH_CAP_XATTR_EXCL;
2073 else
2074 mask |= CEPH_SETATTR_CTIME;
2075 }
2076 }
2077 if (ia_valid & ATTR_FILE)
2078 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
2079
2080 if (dirtied) {
2081 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2082 &prealloc_cf);
2083 inode->i_ctime = current_fs_time(inode->i_sb);
2084 }
2085
2086 release &= issued;
2087 spin_unlock(&ci->i_ceph_lock);
2088 if (lock_snap_rwsem)
2089 up_read(&mdsc->snap_rwsem);
2090
2091 if (inode_dirty_flags)
2092 __mark_inode_dirty(inode, inode_dirty_flags);
2093
2094 if (ia_valid & ATTR_MODE) {
2095 err = posix_acl_chmod(inode, attr->ia_mode);
2096 if (err)
2097 goto out_put;
2098 }
2099
2100 if (mask) {
2101 req->r_inode = inode;
2102 ihold(inode);
2103 req->r_inode_drop = release;
2104 req->r_args.setattr.mask = cpu_to_le32(mask);
2105 req->r_num_caps = 1;
2106 err = ceph_mdsc_do_request(mdsc, NULL, req);
2107 }
2108 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
2109 ceph_cap_string(dirtied), mask);
2110
2111 ceph_mdsc_put_request(req);
2112 if (mask & CEPH_SETATTR_SIZE)
2113 __ceph_do_pending_vmtruncate(inode);
2114 ceph_free_cap_flush(prealloc_cf);
2115 return err;
2116 out_put:
2117 ceph_mdsc_put_request(req);
2118 ceph_free_cap_flush(prealloc_cf);
2119 return err;
2120 }
2121
2122 /*
2123 * setattr
2124 */
2125 int ceph_setattr(struct dentry *dentry, struct iattr *attr)
2126 {
2127 return __ceph_setattr(d_inode(dentry), attr);
2128 }
2129
2130 /*
2131 * Verify that we have a lease on the given mask. If not,
2132 * do a getattr against an mds.
2133 */
2134 int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2135 int mask, bool force)
2136 {
2137 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
2138 struct ceph_mds_client *mdsc = fsc->mdsc;
2139 struct ceph_mds_request *req;
2140 int err;
2141
2142 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2143 dout("do_getattr inode %p SNAPDIR\n", inode);
2144 return 0;
2145 }
2146
2147 dout("do_getattr inode %p mask %s mode 0%o\n",
2148 inode, ceph_cap_string(mask), inode->i_mode);
2149 if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
2150 return 0;
2151
2152 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
2153 if (IS_ERR(req))
2154 return PTR_ERR(req);
2155 req->r_inode = inode;
2156 ihold(inode);
2157 req->r_num_caps = 1;
2158 req->r_args.getattr.mask = cpu_to_le32(mask);
2159 req->r_locked_page = locked_page;
2160 err = ceph_mdsc_do_request(mdsc, NULL, req);
2161 if (locked_page && err == 0) {
2162 u64 inline_version = req->r_reply_info.targeti.inline_version;
2163 if (inline_version == 0) {
2164 /* the reply is supposed to contain inline data */
2165 err = -EINVAL;
2166 } else if (inline_version == CEPH_INLINE_NONE) {
2167 err = -ENODATA;
2168 } else {
2169 err = req->r_reply_info.targeti.inline_len;
2170 }
2171 }
2172 ceph_mdsc_put_request(req);
2173 dout("do_getattr result=%d\n", err);
2174 return err;
2175 }
2176
2177
2178 /*
2179 * Check inode permissions. We verify we have a valid value for
2180 * the AUTH cap, then call the generic handler.
2181 */
2182 int ceph_permission(struct inode *inode, int mask)
2183 {
2184 int err;
2185
2186 if (mask & MAY_NOT_BLOCK)
2187 return -ECHILD;
2188
2189 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
2190
2191 if (!err)
2192 err = generic_permission(inode, mask);
2193 return err;
2194 }
2195
2196 /*
2197 * Get all attributes. Hopefully somedata we'll have a statlite()
2198 * and can limit the fields we require to be accurate.
2199 */
2200 int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
2201 struct kstat *stat)
2202 {
2203 struct inode *inode = d_inode(dentry);
2204 struct ceph_inode_info *ci = ceph_inode(inode);
2205 int err;
2206
2207 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
2208 if (!err) {
2209 generic_fillattr(inode, stat);
2210 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
2211 if (ceph_snap(inode) != CEPH_NOSNAP)
2212 stat->dev = ceph_snap(inode);
2213 else
2214 stat->dev = 0;
2215 if (S_ISDIR(inode->i_mode)) {
2216 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
2217 RBYTES))
2218 stat->size = ci->i_rbytes;
2219 else
2220 stat->size = ci->i_files + ci->i_subdirs;
2221 stat->blocks = 0;
2222 stat->blksize = 65536;
2223 }
2224 }
2225 return err;
2226 }
Linux with added FPC-III support