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PCI: shpchp: Use pci_is_bridge() to simplify code
[linux-2.6/btrfs-unstable.git] / fs / ceph / inode.c
blob0b0728e5be2d7cba589a935159b88f9d26f0b2e9
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/namei.h>
10 #include <linux/writeback.h>
11 #include <linux/vmalloc.h>
12 #include <linux/posix_acl.h>
13
14 #include "super.h"
15 #include "mds_client.h"
16 #include "cache.h"
17 #include <linux/ceph/decode.h>
18
19 /*
20 * Ceph inode operations
21 *
22 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
23 * setattr, etc.), xattr helpers, and helpers for assimilating
24 * metadata returned by the MDS into our cache.
25 *
26 * Also define helpers for doing asynchronous writeback, invalidation,
27 * and truncation for the benefit of those who can't afford to block
28 * (typically because they are in the message handler path).
29 */
30
31 static const struct inode_operations ceph_symlink_iops;
32
33 static void ceph_invalidate_work(struct work_struct *work);
34 static void ceph_writeback_work(struct work_struct *work);
35 static void ceph_vmtruncate_work(struct work_struct *work);
36
37 /*
38 * find or create an inode, given the ceph ino number
39 */
40 static int ceph_set_ino_cb(struct inode *inode, void *data)
41 {
42 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
43 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
44 return 0;
45 }
46
47 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
48 {
49 struct inode *inode;
50 ino_t t = ceph_vino_to_ino(vino);
51
52 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
53 if (inode == NULL)
54 return ERR_PTR(-ENOMEM);
55 if (inode->i_state & I_NEW) {
56 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
57 inode, ceph_vinop(inode), (u64)inode->i_ino);
58 unlock_new_inode(inode);
59 }
60
61 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
62 vino.snap, inode);
63 return inode;
64 }
65
66 /*
67 * get/constuct snapdir inode for a given directory
68 */
69 struct inode *ceph_get_snapdir(struct inode *parent)
70 {
71 struct ceph_vino vino = {
72 .ino = ceph_ino(parent),
73 .snap = CEPH_SNAPDIR,
74 };
75 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
76 struct ceph_inode_info *ci = ceph_inode(inode);
77
78 BUG_ON(!S_ISDIR(parent->i_mode));
79 if (IS_ERR(inode))
80 return inode;
81 inode->i_mode = parent->i_mode;
82 inode->i_uid = parent->i_uid;
83 inode->i_gid = parent->i_gid;
84 inode->i_op = &ceph_dir_iops;
85 inode->i_fop = &ceph_dir_fops;
86 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
87 ci->i_rbytes = 0;
88 return inode;
89 }
90
91 const struct inode_operations ceph_file_iops = {
92 .permission = ceph_permission,
93 .setattr = ceph_setattr,
94 .getattr = ceph_getattr,
95 .setxattr = ceph_setxattr,
96 .getxattr = ceph_getxattr,
97 .listxattr = ceph_listxattr,
98 .removexattr = ceph_removexattr,
99 .get_acl = ceph_get_acl,
100 .set_acl = ceph_set_acl,
101 };
102
103
104 /*
105 * We use a 'frag tree' to keep track of the MDS's directory fragments
106 * for a given inode (usually there is just a single fragment). We
107 * need to know when a child frag is delegated to a new MDS, or when
108 * it is flagged as replicated, so we can direct our requests
109 * accordingly.
110 */
111
112 /*
113 * find/create a frag in the tree
114 */
115 static 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 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
139 "frag %x\n", &ci->vfs_inode,
140 ceph_vinop(&ci->vfs_inode), f);
141 return ERR_PTR(-ENOMEM);
142 }
143 frag->frag = f;
144 frag->split_by = 0;
145 frag->mds = -1;
146 frag->ndist = 0;
147
148 rb_link_node(&frag->node, parent, p);
149 rb_insert_color(&frag->node, &ci->i_fragtree);
150
151 dout("get_or_create_frag added %llx.%llx frag %x\n",
152 ceph_vinop(&ci->vfs_inode), f);
153 return frag;
154 }
155
156 /*
157 * find a specific frag @f
158 */
159 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
160 {
161 struct rb_node *n = ci->i_fragtree.rb_node;
162
163 while (n) {
164 struct ceph_inode_frag *frag =
165 rb_entry(n, struct ceph_inode_frag, node);
166 int c = ceph_frag_compare(f, frag->frag);
167 if (c < 0)
168 n = n->rb_left;
169 else if (c > 0)
170 n = n->rb_right;
171 else
172 return frag;
173 }
174 return NULL;
175 }
176
177 /*
178 * Choose frag containing the given value @v. If @pfrag is
179 * specified, copy the frag delegation info to the caller if
180 * it is present.
181 */
182 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
183 struct ceph_inode_frag *pfrag,
184 int *found)
185 {
186 u32 t = ceph_frag_make(0, 0);
187 struct ceph_inode_frag *frag;
188 unsigned nway, i;
189 u32 n;
190
191 if (found)
192 *found = 0;
193
194 mutex_lock(&ci->i_fragtree_mutex);
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 mutex_unlock(&ci->i_fragtree_mutex);
224 return t;
225 }
226
227 /*
228 * Process dirfrag (delegation) info from the mds. Include leaf
229 * fragment in tree ONLY if ndist > 0. Otherwise, only
230 * branches/splits are included in i_fragtree)
231 */
232 static int ceph_fill_dirfrag(struct inode *inode,
233 struct ceph_mds_reply_dirfrag *dirinfo)
234 {
235 struct ceph_inode_info *ci = ceph_inode(inode);
236 struct ceph_inode_frag *frag;
237 u32 id = le32_to_cpu(dirinfo->frag);
238 int mds = le32_to_cpu(dirinfo->auth);
239 int ndist = le32_to_cpu(dirinfo->ndist);
240 int i;
241 int err = 0;
242
243 mutex_lock(&ci->i_fragtree_mutex);
244 if (ndist == 0) {
245 /* no delegation info needed. */
246 frag = __ceph_find_frag(ci, id);
247 if (!frag)
248 goto out;
249 if (frag->split_by == 0) {
250 /* tree leaf, remove */
251 dout("fill_dirfrag removed %llx.%llx frag %x"
252 " (no ref)\n", ceph_vinop(inode), id);
253 rb_erase(&frag->node, &ci->i_fragtree);
254 kfree(frag);
255 } else {
256 /* tree branch, keep and clear */
257 dout("fill_dirfrag cleared %llx.%llx frag %x"
258 " referral\n", ceph_vinop(inode), id);
259 frag->mds = -1;
260 frag->ndist = 0;
261 }
262 goto out;
263 }
264
265
266 /* find/add this frag to store mds delegation info */
267 frag = __get_or_create_frag(ci, id);
268 if (IS_ERR(frag)) {
269 /* this is not the end of the world; we can continue
270 with bad/inaccurate delegation info */
271 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
272 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
273 err = -ENOMEM;
274 goto out;
275 }
276
277 frag->mds = mds;
278 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
279 for (i = 0; i < frag->ndist; i++)
280 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
281 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
282 ceph_vinop(inode), frag->frag, frag->ndist);
283
284 out:
285 mutex_unlock(&ci->i_fragtree_mutex);
286 return err;
287 }
288
289
290 /*
291 * initialize a newly allocated inode.
292 */
293 struct inode *ceph_alloc_inode(struct super_block *sb)
294 {
295 struct ceph_inode_info *ci;
296 int i;
297
298 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
299 if (!ci)
300 return NULL;
301
302 dout("alloc_inode %p\n", &ci->vfs_inode);
303
304 spin_lock_init(&ci->i_ceph_lock);
305
306 ci->i_version = 0;
307 ci->i_time_warp_seq = 0;
308 ci->i_ceph_flags = 0;
309 atomic_set(&ci->i_release_count, 1);
310 atomic_set(&ci->i_complete_count, 0);
311 ci->i_symlink = NULL;
312
313 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
314
315 ci->i_fragtree = RB_ROOT;
316 mutex_init(&ci->i_fragtree_mutex);
317
318 ci->i_xattrs.blob = NULL;
319 ci->i_xattrs.prealloc_blob = NULL;
320 ci->i_xattrs.dirty = false;
321 ci->i_xattrs.index = RB_ROOT;
322 ci->i_xattrs.count = 0;
323 ci->i_xattrs.names_size = 0;
324 ci->i_xattrs.vals_size = 0;
325 ci->i_xattrs.version = 0;
326 ci->i_xattrs.index_version = 0;
327
328 ci->i_caps = RB_ROOT;
329 ci->i_auth_cap = NULL;
330 ci->i_dirty_caps = 0;
331 ci->i_flushing_caps = 0;
332 INIT_LIST_HEAD(&ci->i_dirty_item);
333 INIT_LIST_HEAD(&ci->i_flushing_item);
334 ci->i_cap_flush_seq = 0;
335 ci->i_cap_flush_last_tid = 0;
336 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid));
337 init_waitqueue_head(&ci->i_cap_wq);
338 ci->i_hold_caps_min = 0;
339 ci->i_hold_caps_max = 0;
340 INIT_LIST_HEAD(&ci->i_cap_delay_list);
341 INIT_LIST_HEAD(&ci->i_cap_snaps);
342 ci->i_head_snapc = NULL;
343 ci->i_snap_caps = 0;
344 ci->i_cap_exporting_issued = 0;
345
346 for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
347 ci->i_nr_by_mode[i] = 0;
348
349 mutex_init(&ci->i_truncate_mutex);
350 ci->i_truncate_seq = 0;
351 ci->i_truncate_size = 0;
352 ci->i_truncate_pending = 0;
353
354 ci->i_max_size = 0;
355 ci->i_reported_size = 0;
356 ci->i_wanted_max_size = 0;
357 ci->i_requested_max_size = 0;
358
359 ci->i_pin_ref = 0;
360 ci->i_rd_ref = 0;
361 ci->i_rdcache_ref = 0;
362 ci->i_wr_ref = 0;
363 ci->i_wb_ref = 0;
364 ci->i_wrbuffer_ref = 0;
365 ci->i_wrbuffer_ref_head = 0;
366 ci->i_shared_gen = 0;
367 ci->i_rdcache_gen = 0;
368 ci->i_rdcache_revoking = 0;
369
370 INIT_LIST_HEAD(&ci->i_unsafe_writes);
371 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
372 spin_lock_init(&ci->i_unsafe_lock);
373
374 ci->i_snap_realm = NULL;
375 INIT_LIST_HEAD(&ci->i_snap_realm_item);
376 INIT_LIST_HEAD(&ci->i_snap_flush_item);
377
378 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
379 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
380
381 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
382
383 ceph_fscache_inode_init(ci);
384
385 return &ci->vfs_inode;
386 }
387
388 static void ceph_i_callback(struct rcu_head *head)
389 {
390 struct inode *inode = container_of(head, struct inode, i_rcu);
391 struct ceph_inode_info *ci = ceph_inode(inode);
392
393 kmem_cache_free(ceph_inode_cachep, ci);
394 }
395
396 void ceph_destroy_inode(struct inode *inode)
397 {
398 struct ceph_inode_info *ci = ceph_inode(inode);
399 struct ceph_inode_frag *frag;
400 struct rb_node *n;
401
402 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
403
404 ceph_fscache_unregister_inode_cookie(ci);
405
406 ceph_queue_caps_release(inode);
407
408 /*
409 * we may still have a snap_realm reference if there are stray
410 * caps in i_cap_exporting_issued or i_snap_caps.
411 */
412 if (ci->i_snap_realm) {
413 struct ceph_mds_client *mdsc =
414 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
415 struct ceph_snap_realm *realm = ci->i_snap_realm;
416
417 dout(" dropping residual ref to snap realm %p\n", realm);
418 spin_lock(&realm->inodes_with_caps_lock);
419 list_del_init(&ci->i_snap_realm_item);
420 spin_unlock(&realm->inodes_with_caps_lock);
421 ceph_put_snap_realm(mdsc, realm);
422 }
423
424 kfree(ci->i_symlink);
425 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
426 frag = rb_entry(n, struct ceph_inode_frag, node);
427 rb_erase(n, &ci->i_fragtree);
428 kfree(frag);
429 }
430
431 __ceph_destroy_xattrs(ci);
432 if (ci->i_xattrs.blob)
433 ceph_buffer_put(ci->i_xattrs.blob);
434 if (ci->i_xattrs.prealloc_blob)
435 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
436
437 call_rcu(&inode->i_rcu, ceph_i_callback);
438 }
439
440 int ceph_drop_inode(struct inode *inode)
441 {
442 /*
443 * Positve dentry and corresponding inode are always accompanied
444 * in MDS reply. So no need to keep inode in the cache after
445 * dropping all its aliases.
446 */
447 return 1;
448 }
449
450 /*
451 * Helpers to fill in size, ctime, mtime, and atime. We have to be
452 * careful because either the client or MDS may have more up to date
453 * info, depending on which capabilities are held, and whether
454 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
455 * and size are monotonically increasing, except when utimes() or
456 * truncate() increments the corresponding _seq values.)
457 */
458 int ceph_fill_file_size(struct inode *inode, int issued,
459 u32 truncate_seq, u64 truncate_size, u64 size)
460 {
461 struct ceph_inode_info *ci = ceph_inode(inode);
462 int queue_trunc = 0;
463
464 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
465 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
466 dout("size %lld -> %llu\n", inode->i_size, size);
467 inode->i_size = size;
468 inode->i_blocks = (size + (1<<9) - 1) >> 9;
469 ci->i_reported_size = size;
470 if (truncate_seq != ci->i_truncate_seq) {
471 dout("truncate_seq %u -> %u\n",
472 ci->i_truncate_seq, truncate_seq);
473 ci->i_truncate_seq = truncate_seq;
474
475 /* the MDS should have revoked these caps */
476 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
477 CEPH_CAP_FILE_RD |
478 CEPH_CAP_FILE_WR |
479 CEPH_CAP_FILE_LAZYIO));
480 /*
481 * If we hold relevant caps, or in the case where we're
482 * not the only client referencing this file and we
483 * don't hold those caps, then we need to check whether
484 * the file is either opened or mmaped
485 */
486 if ((issued & (CEPH_CAP_FILE_CACHE|
487 CEPH_CAP_FILE_BUFFER)) ||
488 mapping_mapped(inode->i_mapping) ||
489 __ceph_caps_file_wanted(ci)) {
490 ci->i_truncate_pending++;
491 queue_trunc = 1;
492 }
493 }
494 }
495 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
496 ci->i_truncate_size != truncate_size) {
497 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
498 truncate_size);
499 ci->i_truncate_size = truncate_size;
500 }
501
502 if (queue_trunc)
503 ceph_fscache_invalidate(inode);
504
505 return queue_trunc;
506 }
507
508 void ceph_fill_file_time(struct inode *inode, int issued,
509 u64 time_warp_seq, struct timespec *ctime,
510 struct timespec *mtime, struct timespec *atime)
511 {
512 struct ceph_inode_info *ci = ceph_inode(inode);
513 int warn = 0;
514
515 if (issued & (CEPH_CAP_FILE_EXCL|
516 CEPH_CAP_FILE_WR|
517 CEPH_CAP_FILE_BUFFER|
518 CEPH_CAP_AUTH_EXCL|
519 CEPH_CAP_XATTR_EXCL)) {
520 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
521 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
522 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
523 ctime->tv_sec, ctime->tv_nsec);
524 inode->i_ctime = *ctime;
525 }
526 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
527 /* the MDS did a utimes() */
528 dout("mtime %ld.%09ld -> %ld.%09ld "
529 "tw %d -> %d\n",
530 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
531 mtime->tv_sec, mtime->tv_nsec,
532 ci->i_time_warp_seq, (int)time_warp_seq);
533
534 inode->i_mtime = *mtime;
535 inode->i_atime = *atime;
536 ci->i_time_warp_seq = time_warp_seq;
537 } else if (time_warp_seq == ci->i_time_warp_seq) {
538 /* nobody did utimes(); take the max */
539 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
540 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
541 inode->i_mtime.tv_sec,
542 inode->i_mtime.tv_nsec,
543 mtime->tv_sec, mtime->tv_nsec);
544 inode->i_mtime = *mtime;
545 }
546 if (timespec_compare(atime, &inode->i_atime) > 0) {
547 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
548 inode->i_atime.tv_sec,
549 inode->i_atime.tv_nsec,
550 atime->tv_sec, atime->tv_nsec);
551 inode->i_atime = *atime;
552 }
553 } else if (issued & CEPH_CAP_FILE_EXCL) {
554 /* we did a utimes(); ignore mds values */
555 } else {
556 warn = 1;
557 }
558 } else {
559 /* we have no write|excl caps; whatever the MDS says is true */
560 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
561 inode->i_ctime = *ctime;
562 inode->i_mtime = *mtime;
563 inode->i_atime = *atime;
564 ci->i_time_warp_seq = time_warp_seq;
565 } else {
566 warn = 1;
567 }
568 }
569 if (warn) /* time_warp_seq shouldn't go backwards */
570 dout("%p mds time_warp_seq %llu < %u\n",
571 inode, time_warp_seq, ci->i_time_warp_seq);
572 }
573
574 /*
575 * Populate an inode based on info from mds. May be called on new or
576 * existing inodes.
577 */
578 static int fill_inode(struct inode *inode,
579 struct ceph_mds_reply_info_in *iinfo,
580 struct ceph_mds_reply_dirfrag *dirinfo,
581 struct ceph_mds_session *session,
582 unsigned long ttl_from, int cap_fmode,
583 struct ceph_cap_reservation *caps_reservation)
584 {
585 struct ceph_mds_reply_inode *info = iinfo->in;
586 struct ceph_inode_info *ci = ceph_inode(inode);
587 int i;
588 int issued = 0, implemented;
589 struct timespec mtime, atime, ctime;
590 u32 nsplits;
591 struct ceph_inode_frag *frag;
592 struct rb_node *rb_node;
593 struct ceph_buffer *xattr_blob = NULL;
594 int err = 0;
595 int queue_trunc = 0;
596
597 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
598 inode, ceph_vinop(inode), le64_to_cpu(info->version),
599 ci->i_version);
600
601 /*
602 * prealloc xattr data, if it looks like we'll need it. only
603 * if len > 4 (meaning there are actually xattrs; the first 4
604 * bytes are the xattr count).
605 */
606 if (iinfo->xattr_len > 4) {
607 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
608 if (!xattr_blob)
609 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
610 iinfo->xattr_len);
611 }
612
613 spin_lock(&ci->i_ceph_lock);
614
615 /*
616 * provided version will be odd if inode value is projected,
617 * even if stable. skip the update if we have newer stable
618 * info (ours>=theirs, e.g. due to racing mds replies), unless
619 * we are getting projected (unstable) info (in which case the
620 * version is odd, and we want ours>theirs).
621 * us them
622 * 2 2 skip
623 * 3 2 skip
624 * 3 3 update
625 */
626 if (le64_to_cpu(info->version) > 0 &&
627 (ci->i_version & ~1) >= le64_to_cpu(info->version))
628 goto no_change;
629
630 issued = __ceph_caps_issued(ci, &implemented);
631 issued |= implemented | __ceph_caps_dirty(ci);
632
633 /* update inode */
634 ci->i_version = le64_to_cpu(info->version);
635 inode->i_version++;
636 inode->i_rdev = le32_to_cpu(info->rdev);
637
638 if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
639 inode->i_mode = le32_to_cpu(info->mode);
640 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
641 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
642 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
643 from_kuid(&init_user_ns, inode->i_uid),
644 from_kgid(&init_user_ns, inode->i_gid));
645 }
646
647 if ((issued & CEPH_CAP_LINK_EXCL) == 0)
648 set_nlink(inode, le32_to_cpu(info->nlink));
649
650 /* be careful with mtime, atime, size */
651 ceph_decode_timespec(&atime, &info->atime);
652 ceph_decode_timespec(&mtime, &info->mtime);
653 ceph_decode_timespec(&ctime, &info->ctime);
654 queue_trunc = ceph_fill_file_size(inode, issued,
655 le32_to_cpu(info->truncate_seq),
656 le64_to_cpu(info->truncate_size),
657 le64_to_cpu(info->size));
658 ceph_fill_file_time(inode, issued,
659 le32_to_cpu(info->time_warp_seq),
660 &ctime, &mtime, &atime);
661
662 ci->i_layout = info->layout;
663 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
664
665 /* xattrs */
666 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
667 if ((issued & CEPH_CAP_XATTR_EXCL) == 0 &&
668 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
669 if (ci->i_xattrs.blob)
670 ceph_buffer_put(ci->i_xattrs.blob);
671 ci->i_xattrs.blob = xattr_blob;
672 if (xattr_blob)
673 memcpy(ci->i_xattrs.blob->vec.iov_base,
674 iinfo->xattr_data, iinfo->xattr_len);
675 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
676 ceph_forget_all_cached_acls(inode);
677 xattr_blob = NULL;
678 }
679
680 inode->i_mapping->a_ops = &ceph_aops;
681 inode->i_mapping->backing_dev_info =
682 &ceph_sb_to_client(inode->i_sb)->backing_dev_info;
683
684 switch (inode->i_mode & S_IFMT) {
685 case S_IFIFO:
686 case S_IFBLK:
687 case S_IFCHR:
688 case S_IFSOCK:
689 init_special_inode(inode, inode->i_mode, inode->i_rdev);
690 inode->i_op = &ceph_file_iops;
691 break;
692 case S_IFREG:
693 inode->i_op = &ceph_file_iops;
694 inode->i_fop = &ceph_file_fops;
695 break;
696 case S_IFLNK:
697 inode->i_op = &ceph_symlink_iops;
698 if (!ci->i_symlink) {
699 u32 symlen = iinfo->symlink_len;
700 char *sym;
701
702 spin_unlock(&ci->i_ceph_lock);
703
704 err = -EINVAL;
705 if (WARN_ON(symlen != inode->i_size))
706 goto out;
707
708 err = -ENOMEM;
709 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
710 if (!sym)
711 goto out;
712
713 spin_lock(&ci->i_ceph_lock);
714 if (!ci->i_symlink)
715 ci->i_symlink = sym;
716 else
717 kfree(sym); /* lost a race */
718 }
719 break;
720 case S_IFDIR:
721 inode->i_op = &ceph_dir_iops;
722 inode->i_fop = &ceph_dir_fops;
723
724 ci->i_dir_layout = iinfo->dir_layout;
725
726 ci->i_files = le64_to_cpu(info->files);
727 ci->i_subdirs = le64_to_cpu(info->subdirs);
728 ci->i_rbytes = le64_to_cpu(info->rbytes);
729 ci->i_rfiles = le64_to_cpu(info->rfiles);
730 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
731 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
732 break;
733 default:
734 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
735 ceph_vinop(inode), inode->i_mode);
736 }
737
738 /* set dir completion flag? */
739 if (S_ISDIR(inode->i_mode) &&
740 ci->i_files == 0 && ci->i_subdirs == 0 &&
741 ceph_snap(inode) == CEPH_NOSNAP &&
742 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
743 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
744 !__ceph_dir_is_complete(ci)) {
745 dout(" marking %p complete (empty)\n", inode);
746 __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count));
747 ci->i_max_offset = 2;
748 }
749 no_change:
750 /* only update max_size on auth cap */
751 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
752 ci->i_max_size != le64_to_cpu(info->max_size)) {
753 dout("max_size %lld -> %llu\n", ci->i_max_size,
754 le64_to_cpu(info->max_size));
755 ci->i_max_size = le64_to_cpu(info->max_size);
756 }
757
758 spin_unlock(&ci->i_ceph_lock);
759
760 /* queue truncate if we saw i_size decrease */
761 if (queue_trunc)
762 ceph_queue_vmtruncate(inode);
763
764 /* populate frag tree */
765 /* FIXME: move me up, if/when version reflects fragtree changes */
766 nsplits = le32_to_cpu(info->fragtree.nsplits);
767 mutex_lock(&ci->i_fragtree_mutex);
768 rb_node = rb_first(&ci->i_fragtree);
769 for (i = 0; i < nsplits; i++) {
770 u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
771 frag = NULL;
772 while (rb_node) {
773 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
774 if (ceph_frag_compare(frag->frag, id) >= 0) {
775 if (frag->frag != id)
776 frag = NULL;
777 else
778 rb_node = rb_next(rb_node);
779 break;
780 }
781 rb_node = rb_next(rb_node);
782 rb_erase(&frag->node, &ci->i_fragtree);
783 kfree(frag);
784 frag = NULL;
785 }
786 if (!frag) {
787 frag = __get_or_create_frag(ci, id);
788 if (IS_ERR(frag))
789 continue;
790 }
791 frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
792 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
793 }
794 while (rb_node) {
795 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
796 rb_node = rb_next(rb_node);
797 rb_erase(&frag->node, &ci->i_fragtree);
798 kfree(frag);
799 }
800 mutex_unlock(&ci->i_fragtree_mutex);
801
802 /* were we issued a capability? */
803 if (info->cap.caps) {
804 if (ceph_snap(inode) == CEPH_NOSNAP) {
805 ceph_add_cap(inode, session,
806 le64_to_cpu(info->cap.cap_id),
807 cap_fmode,
808 le32_to_cpu(info->cap.caps),
809 le32_to_cpu(info->cap.wanted),
810 le32_to_cpu(info->cap.seq),
811 le32_to_cpu(info->cap.mseq),
812 le64_to_cpu(info->cap.realm),
813 info->cap.flags,
814 caps_reservation);
815 } else {
816 spin_lock(&ci->i_ceph_lock);
817 dout(" %p got snap_caps %s\n", inode,
818 ceph_cap_string(le32_to_cpu(info->cap.caps)));
819 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
820 if (cap_fmode >= 0)
821 __ceph_get_fmode(ci, cap_fmode);
822 spin_unlock(&ci->i_ceph_lock);
823 }
824 } else if (cap_fmode >= 0) {
825 pr_warning("mds issued no caps on %llx.%llx\n",
826 ceph_vinop(inode));
827 __ceph_get_fmode(ci, cap_fmode);
828 }
829
830 /* update delegation info? */
831 if (dirinfo)
832 ceph_fill_dirfrag(inode, dirinfo);
833
834 err = 0;
835
836 out:
837 if (xattr_blob)
838 ceph_buffer_put(xattr_blob);
839 return err;
840 }
841
842 /*
843 * caller should hold session s_mutex.
844 */
845 static void update_dentry_lease(struct dentry *dentry,
846 struct ceph_mds_reply_lease *lease,
847 struct ceph_mds_session *session,
848 unsigned long from_time)
849 {
850 struct ceph_dentry_info *di = ceph_dentry(dentry);
851 long unsigned duration = le32_to_cpu(lease->duration_ms);
852 long unsigned ttl = from_time + (duration * HZ) / 1000;
853 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
854 struct inode *dir;
855
856 /* only track leases on regular dentries */
857 if (dentry->d_op != &ceph_dentry_ops)
858 return;
859
860 spin_lock(&dentry->d_lock);
861 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
862 dentry, duration, ttl);
863
864 /* make lease_rdcache_gen match directory */
865 dir = dentry->d_parent->d_inode;
866 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
867
868 if (duration == 0)
869 goto out_unlock;
870
871 if (di->lease_gen == session->s_cap_gen &&
872 time_before(ttl, dentry->d_time))
873 goto out_unlock; /* we already have a newer lease. */
874
875 if (di->lease_session && di->lease_session != session)
876 goto out_unlock;
877
878 ceph_dentry_lru_touch(dentry);
879
880 if (!di->lease_session)
881 di->lease_session = ceph_get_mds_session(session);
882 di->lease_gen = session->s_cap_gen;
883 di->lease_seq = le32_to_cpu(lease->seq);
884 di->lease_renew_after = half_ttl;
885 di->lease_renew_from = 0;
886 dentry->d_time = ttl;
887 out_unlock:
888 spin_unlock(&dentry->d_lock);
889 return;
890 }
891
892 /*
893 * Set dentry's directory position based on the current dir's max, and
894 * order it in d_subdirs, so that dcache_readdir behaves.
895 *
896 * Always called under directory's i_mutex.
897 */
898 static void ceph_set_dentry_offset(struct dentry *dn)
899 {
900 struct dentry *dir = dn->d_parent;
901 struct inode *inode = dir->d_inode;
902 struct ceph_inode_info *ci;
903 struct ceph_dentry_info *di;
904
905 BUG_ON(!inode);
906
907 ci = ceph_inode(inode);
908 di = ceph_dentry(dn);
909
910 spin_lock(&ci->i_ceph_lock);
911 if (!__ceph_dir_is_complete(ci)) {
912 spin_unlock(&ci->i_ceph_lock);
913 return;
914 }
915 di->offset = ceph_inode(inode)->i_max_offset++;
916 spin_unlock(&ci->i_ceph_lock);
917
918 spin_lock(&dir->d_lock);
919 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
920 list_move(&dn->d_u.d_child, &dir->d_subdirs);
921 dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset,
922 dn->d_u.d_child.prev, dn->d_u.d_child.next);
923 spin_unlock(&dn->d_lock);
924 spin_unlock(&dir->d_lock);
925 }
926
927 /*
928 * splice a dentry to an inode.
929 * caller must hold directory i_mutex for this to be safe.
930 *
931 * we will only rehash the resulting dentry if @prehash is
932 * true; @prehash will be set to false (for the benefit of
933 * the caller) if we fail.
934 */
935 static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
936 bool *prehash, bool set_offset)
937 {
938 struct dentry *realdn;
939
940 BUG_ON(dn->d_inode);
941
942 /* dn must be unhashed */
943 if (!d_unhashed(dn))
944 d_drop(dn);
945 realdn = d_materialise_unique(dn, in);
946 if (IS_ERR(realdn)) {
947 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
948 PTR_ERR(realdn), dn, in, ceph_vinop(in));
949 if (prehash)
950 *prehash = false; /* don't rehash on error */
951 dn = realdn; /* note realdn contains the error */
952 goto out;
953 } else if (realdn) {
954 dout("dn %p (%d) spliced with %p (%d) "
955 "inode %p ino %llx.%llx\n",
956 dn, d_count(dn),
957 realdn, d_count(realdn),
958 realdn->d_inode, ceph_vinop(realdn->d_inode));
959 dput(dn);
960 dn = realdn;
961 } else {
962 BUG_ON(!ceph_dentry(dn));
963 dout("dn %p attached to %p ino %llx.%llx\n",
964 dn, dn->d_inode, ceph_vinop(dn->d_inode));
965 }
966 if ((!prehash || *prehash) && d_unhashed(dn))
967 d_rehash(dn);
968 if (set_offset)
969 ceph_set_dentry_offset(dn);
970 out:
971 return dn;
972 }
973
974 /*
975 * Incorporate results into the local cache. This is either just
976 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
977 * after a lookup).
978 *
979 * A reply may contain
980 * a directory inode along with a dentry.
981 * and/or a target inode
982 *
983 * Called with snap_rwsem (read).
984 */
985 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
986 struct ceph_mds_session *session)
987 {
988 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
989 struct inode *in = NULL;
990 struct ceph_mds_reply_inode *ininfo;
991 struct ceph_vino vino;
992 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
993 int err = 0;
994
995 dout("fill_trace %p is_dentry %d is_target %d\n", req,
996 rinfo->head->is_dentry, rinfo->head->is_target);
997
998 #if 0
999 /*
1000 * Debugging hook:
1001 *
1002 * If we resend completed ops to a recovering mds, we get no
1003 * trace. Since that is very rare, pretend this is the case
1004 * to ensure the 'no trace' handlers in the callers behave.
1005 *
1006 * Fill in inodes unconditionally to avoid breaking cap
1007 * invariants.
1008 */
1009 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
1010 pr_info("fill_trace faking empty trace on %lld %s\n",
1011 req->r_tid, ceph_mds_op_name(rinfo->head->op));
1012 if (rinfo->head->is_dentry) {
1013 rinfo->head->is_dentry = 0;
1014 err = fill_inode(req->r_locked_dir,
1015 &rinfo->diri, rinfo->dirfrag,
1016 session, req->r_request_started, -1);
1017 }
1018 if (rinfo->head->is_target) {
1019 rinfo->head->is_target = 0;
1020 ininfo = rinfo->targeti.in;
1021 vino.ino = le64_to_cpu(ininfo->ino);
1022 vino.snap = le64_to_cpu(ininfo->snapid);
1023 in = ceph_get_inode(sb, vino);
1024 err = fill_inode(in, &rinfo->targeti, NULL,
1025 session, req->r_request_started,
1026 req->r_fmode);
1027 iput(in);
1028 }
1029 }
1030 #endif
1031
1032 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1033 dout("fill_trace reply is empty!\n");
1034 if (rinfo->head->result == 0 && req->r_locked_dir)
1035 ceph_invalidate_dir_request(req);
1036 return 0;
1037 }
1038
1039 if (rinfo->head->is_dentry) {
1040 struct inode *dir = req->r_locked_dir;
1041
1042 if (dir) {
1043 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
1044 session, req->r_request_started, -1,
1045 &req->r_caps_reservation);
1046 if (err < 0)
1047 goto done;
1048 } else {
1049 WARN_ON_ONCE(1);
1050 }
1051
1052 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
1053 struct qstr dname;
1054 struct dentry *dn, *parent;
1055
1056 BUG_ON(!rinfo->head->is_target);
1057 BUG_ON(req->r_dentry);
1058
1059 parent = d_find_any_alias(dir);
1060 BUG_ON(!parent);
1061
1062 dname.name = rinfo->dname;
1063 dname.len = rinfo->dname_len;
1064 dname.hash = full_name_hash(dname.name, dname.len);
1065 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1066 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1067 retry_lookup:
1068 dn = d_lookup(parent, &dname);
1069 dout("d_lookup on parent=%p name=%.*s got %p\n",
1070 parent, dname.len, dname.name, dn);
1071
1072 if (!dn) {
1073 dn = d_alloc(parent, &dname);
1074 dout("d_alloc %p '%.*s' = %p\n", parent,
1075 dname.len, dname.name, dn);
1076 if (dn == NULL) {
1077 dput(parent);
1078 err = -ENOMEM;
1079 goto done;
1080 }
1081 err = ceph_init_dentry(dn);
1082 if (err < 0) {
1083 dput(dn);
1084 dput(parent);
1085 goto done;
1086 }
1087 } else if (dn->d_inode &&
1088 (ceph_ino(dn->d_inode) != vino.ino ||
1089 ceph_snap(dn->d_inode) != vino.snap)) {
1090 dout(" dn %p points to wrong inode %p\n",
1091 dn, dn->d_inode);
1092 d_delete(dn);
1093 dput(dn);
1094 goto retry_lookup;
1095 }
1096
1097 req->r_dentry = dn;
1098 dput(parent);
1099 }
1100 }
1101
1102 if (rinfo->head->is_target) {
1103 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1104 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1105
1106 in = ceph_get_inode(sb, vino);
1107 if (IS_ERR(in)) {
1108 err = PTR_ERR(in);
1109 goto done;
1110 }
1111 req->r_target_inode = in;
1112
1113 err = fill_inode(in, &rinfo->targeti, NULL,
1114 session, req->r_request_started,
1115 (!req->r_aborted && rinfo->head->result == 0) ?
1116 req->r_fmode : -1,
1117 &req->r_caps_reservation);
1118 if (err < 0) {
1119 pr_err("fill_inode badness %p %llx.%llx\n",
1120 in, ceph_vinop(in));
1121 goto done;
1122 }
1123 }
1124
1125 /*
1126 * ignore null lease/binding on snapdir ENOENT, or else we
1127 * will have trouble splicing in the virtual snapdir later
1128 */
1129 if (rinfo->head->is_dentry && !req->r_aborted &&
1130 req->r_locked_dir &&
1131 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1132 fsc->mount_options->snapdir_name,
1133 req->r_dentry->d_name.len))) {
1134 /*
1135 * lookup link rename : null -> possibly existing inode
1136 * mknod symlink mkdir : null -> new inode
1137 * unlink : linked -> null
1138 */
1139 struct inode *dir = req->r_locked_dir;
1140 struct dentry *dn = req->r_dentry;
1141 bool have_dir_cap, have_lease;
1142
1143 BUG_ON(!dn);
1144 BUG_ON(!dir);
1145 BUG_ON(dn->d_parent->d_inode != dir);
1146 BUG_ON(ceph_ino(dir) !=
1147 le64_to_cpu(rinfo->diri.in->ino));
1148 BUG_ON(ceph_snap(dir) !=
1149 le64_to_cpu(rinfo->diri.in->snapid));
1150
1151 /* do we have a lease on the whole dir? */
1152 have_dir_cap =
1153 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1154 CEPH_CAP_FILE_SHARED);
1155
1156 /* do we have a dn lease? */
1157 have_lease = have_dir_cap ||
1158 le32_to_cpu(rinfo->dlease->duration_ms);
1159 if (!have_lease)
1160 dout("fill_trace no dentry lease or dir cap\n");
1161
1162 /* rename? */
1163 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1164 dout(" src %p '%.*s' dst %p '%.*s'\n",
1165 req->r_old_dentry,
1166 req->r_old_dentry->d_name.len,
1167 req->r_old_dentry->d_name.name,
1168 dn, dn->d_name.len, dn->d_name.name);
1169 dout("fill_trace doing d_move %p -> %p\n",
1170 req->r_old_dentry, dn);
1171
1172 d_move(req->r_old_dentry, dn);
1173 dout(" src %p '%.*s' dst %p '%.*s'\n",
1174 req->r_old_dentry,
1175 req->r_old_dentry->d_name.len,
1176 req->r_old_dentry->d_name.name,
1177 dn, dn->d_name.len, dn->d_name.name);
1178
1179 /* ensure target dentry is invalidated, despite
1180 rehashing bug in vfs_rename_dir */
1181 ceph_invalidate_dentry_lease(dn);
1182
1183 /*
1184 * d_move() puts the renamed dentry at the end of
1185 * d_subdirs. We need to assign it an appropriate
1186 * directory offset so we can behave when dir is
1187 * complete.
1188 */
1189 ceph_set_dentry_offset(req->r_old_dentry);
1190 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1191 ceph_dentry(req->r_old_dentry)->offset);
1192
1193 dn = req->r_old_dentry; /* use old_dentry */
1194 }
1195
1196 /* null dentry? */
1197 if (!rinfo->head->is_target) {
1198 dout("fill_trace null dentry\n");
1199 if (dn->d_inode) {
1200 dout("d_delete %p\n", dn);
1201 d_delete(dn);
1202 } else {
1203 dout("d_instantiate %p NULL\n", dn);
1204 d_instantiate(dn, NULL);
1205 if (have_lease && d_unhashed(dn))
1206 d_rehash(dn);
1207 update_dentry_lease(dn, rinfo->dlease,
1208 session,
1209 req->r_request_started);
1210 }
1211 goto done;
1212 }
1213
1214 /* attach proper inode */
1215 if (!dn->d_inode) {
1216 ihold(in);
1217 dn = splice_dentry(dn, in, &have_lease, true);
1218 if (IS_ERR(dn)) {
1219 err = PTR_ERR(dn);
1220 goto done;
1221 }
1222 req->r_dentry = dn; /* may have spliced */
1223 } else if (dn->d_inode && dn->d_inode != in) {
1224 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1225 dn, dn->d_inode, ceph_vinop(dn->d_inode),
1226 ceph_vinop(in));
1227 have_lease = false;
1228 }
1229
1230 if (have_lease)
1231 update_dentry_lease(dn, rinfo->dlease, session,
1232 req->r_request_started);
1233 dout(" final dn %p\n", dn);
1234 } else if (!req->r_aborted &&
1235 (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1236 req->r_op == CEPH_MDS_OP_MKSNAP)) {
1237 struct dentry *dn = req->r_dentry;
1238
1239 /* fill out a snapdir LOOKUPSNAP dentry */
1240 BUG_ON(!dn);
1241 BUG_ON(!req->r_locked_dir);
1242 BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR);
1243 ininfo = rinfo->targeti.in;
1244 vino.ino = le64_to_cpu(ininfo->ino);
1245 vino.snap = le64_to_cpu(ininfo->snapid);
1246 dout(" linking snapped dir %p to dn %p\n", in, dn);
1247 ihold(in);
1248 dn = splice_dentry(dn, in, NULL, true);
1249 if (IS_ERR(dn)) {
1250 err = PTR_ERR(dn);
1251 goto done;
1252 }
1253 req->r_dentry = dn; /* may have spliced */
1254 }
1255 done:
1256 dout("fill_trace done err=%d\n", err);
1257 return err;
1258 }
1259
1260 /*
1261 * Prepopulate our cache with readdir results, leases, etc.
1262 */
1263 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1264 struct ceph_mds_session *session)
1265 {
1266 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1267 int i, err = 0;
1268
1269 for (i = 0; i < rinfo->dir_nr; i++) {
1270 struct ceph_vino vino;
1271 struct inode *in;
1272 int rc;
1273
1274 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1275 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1276
1277 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1278 if (IS_ERR(in)) {
1279 err = PTR_ERR(in);
1280 dout("new_inode badness got %d\n", err);
1281 continue;
1282 }
1283 rc = fill_inode(in, &rinfo->dir_in[i], NULL, session,
1284 req->r_request_started, -1,
1285 &req->r_caps_reservation);
1286 if (rc < 0) {
1287 pr_err("fill_inode badness on %p got %d\n", in, rc);
1288 err = rc;
1289 continue;
1290 }
1291 }
1292
1293 return err;
1294 }
1295
1296 int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1297 struct ceph_mds_session *session)
1298 {
1299 struct dentry *parent = req->r_dentry;
1300 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1301 struct qstr dname;
1302 struct dentry *dn;
1303 struct inode *in;
1304 int err = 0, ret, i;
1305 struct inode *snapdir = NULL;
1306 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1307 struct ceph_dentry_info *di;
1308 u64 r_readdir_offset = req->r_readdir_offset;
1309 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1310
1311 if (rinfo->dir_dir &&
1312 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1313 dout("readdir_prepopulate got new frag %x -> %x\n",
1314 frag, le32_to_cpu(rinfo->dir_dir->frag));
1315 frag = le32_to_cpu(rinfo->dir_dir->frag);
1316 if (ceph_frag_is_leftmost(frag))
1317 r_readdir_offset = 2;
1318 else
1319 r_readdir_offset = 0;
1320 }
1321
1322 if (req->r_aborted)
1323 return readdir_prepopulate_inodes_only(req, session);
1324
1325 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1326 snapdir = ceph_get_snapdir(parent->d_inode);
1327 parent = d_find_alias(snapdir);
1328 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1329 rinfo->dir_nr, parent);
1330 } else {
1331 dout("readdir_prepopulate %d items under dn %p\n",
1332 rinfo->dir_nr, parent);
1333 if (rinfo->dir_dir)
1334 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir);
1335 }
1336
1337 /* FIXME: release caps/leases if error occurs */
1338 for (i = 0; i < rinfo->dir_nr; i++) {
1339 struct ceph_vino vino;
1340
1341 dname.name = rinfo->dir_dname[i];
1342 dname.len = rinfo->dir_dname_len[i];
1343 dname.hash = full_name_hash(dname.name, dname.len);
1344
1345 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1346 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1347
1348 retry_lookup:
1349 dn = d_lookup(parent, &dname);
1350 dout("d_lookup on parent=%p name=%.*s got %p\n",
1351 parent, dname.len, dname.name, dn);
1352
1353 if (!dn) {
1354 dn = d_alloc(parent, &dname);
1355 dout("d_alloc %p '%.*s' = %p\n", parent,
1356 dname.len, dname.name, dn);
1357 if (dn == NULL) {
1358 dout("d_alloc badness\n");
1359 err = -ENOMEM;
1360 goto out;
1361 }
1362 ret = ceph_init_dentry(dn);
1363 if (ret < 0) {
1364 dput(dn);
1365 err = ret;
1366 goto out;
1367 }
1368 } else if (dn->d_inode &&
1369 (ceph_ino(dn->d_inode) != vino.ino ||
1370 ceph_snap(dn->d_inode) != vino.snap)) {
1371 dout(" dn %p points to wrong inode %p\n",
1372 dn, dn->d_inode);
1373 d_delete(dn);
1374 dput(dn);
1375 goto retry_lookup;
1376 } else {
1377 /* reorder parent's d_subdirs */
1378 spin_lock(&parent->d_lock);
1379 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
1380 list_move(&dn->d_u.d_child, &parent->d_subdirs);
1381 spin_unlock(&dn->d_lock);
1382 spin_unlock(&parent->d_lock);
1383 }
1384
1385 /* inode */
1386 if (dn->d_inode) {
1387 in = dn->d_inode;
1388 } else {
1389 in = ceph_get_inode(parent->d_sb, vino);
1390 if (IS_ERR(in)) {
1391 dout("new_inode badness\n");
1392 d_drop(dn);
1393 dput(dn);
1394 err = PTR_ERR(in);
1395 goto out;
1396 }
1397 }
1398
1399 if (fill_inode(in, &rinfo->dir_in[i], NULL, session,
1400 req->r_request_started, -1,
1401 &req->r_caps_reservation) < 0) {
1402 pr_err("fill_inode badness on %p\n", in);
1403 if (!dn->d_inode)
1404 iput(in);
1405 d_drop(dn);
1406 goto next_item;
1407 }
1408
1409 if (!dn->d_inode) {
1410 dn = splice_dentry(dn, in, NULL, false);
1411 if (IS_ERR(dn)) {
1412 err = PTR_ERR(dn);
1413 dn = NULL;
1414 goto next_item;
1415 }
1416 }
1417
1418 di = dn->d_fsdata;
1419 di->offset = ceph_make_fpos(frag, i + r_readdir_offset);
1420
1421 update_dentry_lease(dn, rinfo->dir_dlease[i],
1422 req->r_session,
1423 req->r_request_started);
1424 next_item:
1425 if (dn)
1426 dput(dn);
1427 }
1428 if (err == 0)
1429 req->r_did_prepopulate = true;
1430
1431 out:
1432 if (snapdir) {
1433 iput(snapdir);
1434 dput(parent);
1435 }
1436 dout("readdir_prepopulate done\n");
1437 return err;
1438 }
1439
1440 int ceph_inode_set_size(struct inode *inode, loff_t size)
1441 {
1442 struct ceph_inode_info *ci = ceph_inode(inode);
1443 int ret = 0;
1444
1445 spin_lock(&ci->i_ceph_lock);
1446 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1447 inode->i_size = size;
1448 inode->i_blocks = (size + (1 << 9) - 1) >> 9;
1449
1450 /* tell the MDS if we are approaching max_size */
1451 if ((size << 1) >= ci->i_max_size &&
1452 (ci->i_reported_size << 1) < ci->i_max_size)
1453 ret = 1;
1454
1455 spin_unlock(&ci->i_ceph_lock);
1456 return ret;
1457 }
1458
1459 /*
1460 * Write back inode data in a worker thread. (This can't be done
1461 * in the message handler context.)
1462 */
1463 void ceph_queue_writeback(struct inode *inode)
1464 {
1465 ihold(inode);
1466 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1467 &ceph_inode(inode)->i_wb_work)) {
1468 dout("ceph_queue_writeback %p\n", inode);
1469 } else {
1470 dout("ceph_queue_writeback %p failed\n", inode);
1471 iput(inode);
1472 }
1473 }
1474
1475 static void ceph_writeback_work(struct work_struct *work)
1476 {
1477 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1478 i_wb_work);
1479 struct inode *inode = &ci->vfs_inode;
1480
1481 dout("writeback %p\n", inode);
1482 filemap_fdatawrite(&inode->i_data);
1483 iput(inode);
1484 }
1485
1486 /*
1487 * queue an async invalidation
1488 */
1489 void ceph_queue_invalidate(struct inode *inode)
1490 {
1491 ihold(inode);
1492 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1493 &ceph_inode(inode)->i_pg_inv_work)) {
1494 dout("ceph_queue_invalidate %p\n", inode);
1495 } else {
1496 dout("ceph_queue_invalidate %p failed\n", inode);
1497 iput(inode);
1498 }
1499 }
1500
1501 /*
1502 * Invalidate inode pages in a worker thread. (This can't be done
1503 * in the message handler context.)
1504 */
1505 static void ceph_invalidate_work(struct work_struct *work)
1506 {
1507 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1508 i_pg_inv_work);
1509 struct inode *inode = &ci->vfs_inode;
1510 u32 orig_gen;
1511 int check = 0;
1512
1513 mutex_lock(&ci->i_truncate_mutex);
1514 spin_lock(&ci->i_ceph_lock);
1515 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1516 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1517 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1518 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1519 check = 1;
1520 spin_unlock(&ci->i_ceph_lock);
1521 mutex_unlock(&ci->i_truncate_mutex);
1522 goto out;
1523 }
1524 orig_gen = ci->i_rdcache_gen;
1525 spin_unlock(&ci->i_ceph_lock);
1526
1527 truncate_inode_pages(inode->i_mapping, 0);
1528
1529 spin_lock(&ci->i_ceph_lock);
1530 if (orig_gen == ci->i_rdcache_gen &&
1531 orig_gen == ci->i_rdcache_revoking) {
1532 dout("invalidate_pages %p gen %d successful\n", inode,
1533 ci->i_rdcache_gen);
1534 ci->i_rdcache_revoking--;
1535 check = 1;
1536 } else {
1537 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1538 inode, orig_gen, ci->i_rdcache_gen,
1539 ci->i_rdcache_revoking);
1540 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1541 check = 1;
1542 }
1543 spin_unlock(&ci->i_ceph_lock);
1544 mutex_unlock(&ci->i_truncate_mutex);
1545 out:
1546 if (check)
1547 ceph_check_caps(ci, 0, NULL);
1548 iput(inode);
1549 }
1550
1551
1552 /*
1553 * called by trunc_wq;
1554 *
1555 * We also truncate in a separate thread as well.
1556 */
1557 static void ceph_vmtruncate_work(struct work_struct *work)
1558 {
1559 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1560 i_vmtruncate_work);
1561 struct inode *inode = &ci->vfs_inode;
1562
1563 dout("vmtruncate_work %p\n", inode);
1564 __ceph_do_pending_vmtruncate(inode);
1565 iput(inode);
1566 }
1567
1568 /*
1569 * Queue an async vmtruncate. If we fail to queue work, we will handle
1570 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1571 */
1572 void ceph_queue_vmtruncate(struct inode *inode)
1573 {
1574 struct ceph_inode_info *ci = ceph_inode(inode);
1575
1576 ihold(inode);
1577
1578 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
1579 &ci->i_vmtruncate_work)) {
1580 dout("ceph_queue_vmtruncate %p\n", inode);
1581 } else {
1582 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1583 inode, ci->i_truncate_pending);
1584 iput(inode);
1585 }
1586 }
1587
1588 /*
1589 * Make sure any pending truncation is applied before doing anything
1590 * that may depend on it.
1591 */
1592 void __ceph_do_pending_vmtruncate(struct inode *inode)
1593 {
1594 struct ceph_inode_info *ci = ceph_inode(inode);
1595 u64 to;
1596 int wrbuffer_refs, finish = 0;
1597
1598 mutex_lock(&ci->i_truncate_mutex);
1599 retry:
1600 spin_lock(&ci->i_ceph_lock);
1601 if (ci->i_truncate_pending == 0) {
1602 dout("__do_pending_vmtruncate %p none pending\n", inode);
1603 spin_unlock(&ci->i_ceph_lock);
1604 mutex_unlock(&ci->i_truncate_mutex);
1605 return;
1606 }
1607
1608 /*
1609 * make sure any dirty snapped pages are flushed before we
1610 * possibly truncate them.. so write AND block!
1611 */
1612 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1613 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1614 inode);
1615 spin_unlock(&ci->i_ceph_lock);
1616 filemap_write_and_wait_range(&inode->i_data, 0,
1617 inode->i_sb->s_maxbytes);
1618 goto retry;
1619 }
1620
1621 /* there should be no reader or writer */
1622 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1623
1624 to = ci->i_truncate_size;
1625 wrbuffer_refs = ci->i_wrbuffer_ref;
1626 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1627 ci->i_truncate_pending, to);
1628 spin_unlock(&ci->i_ceph_lock);
1629
1630 truncate_inode_pages(inode->i_mapping, to);
1631
1632 spin_lock(&ci->i_ceph_lock);
1633 if (to == ci->i_truncate_size) {
1634 ci->i_truncate_pending = 0;
1635 finish = 1;
1636 }
1637 spin_unlock(&ci->i_ceph_lock);
1638 if (!finish)
1639 goto retry;
1640
1641 mutex_unlock(&ci->i_truncate_mutex);
1642
1643 if (wrbuffer_refs == 0)
1644 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1645
1646 wake_up_all(&ci->i_cap_wq);
1647 }
1648
1649 /*
1650 * symlinks
1651 */
1652 static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
1653 {
1654 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode);
1655 nd_set_link(nd, ci->i_symlink);
1656 return NULL;
1657 }
1658
1659 static const struct inode_operations ceph_symlink_iops = {
1660 .readlink = generic_readlink,
1661 .follow_link = ceph_sym_follow_link,
1662 .setattr = ceph_setattr,
1663 .getattr = ceph_getattr,
1664 .setxattr = ceph_setxattr,
1665 .getxattr = ceph_getxattr,
1666 .listxattr = ceph_listxattr,
1667 .removexattr = ceph_removexattr,
1668 };
1669
1670 /*
1671 * setattr
1672 */
1673 int ceph_setattr(struct dentry *dentry, struct iattr *attr)
1674 {
1675 struct inode *inode = dentry->d_inode;
1676 struct ceph_inode_info *ci = ceph_inode(inode);
1677 const unsigned int ia_valid = attr->ia_valid;
1678 struct ceph_mds_request *req;
1679 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
1680 int issued;
1681 int release = 0, dirtied = 0;
1682 int mask = 0;
1683 int err = 0;
1684 int inode_dirty_flags = 0;
1685
1686 if (ceph_snap(inode) != CEPH_NOSNAP)
1687 return -EROFS;
1688
1689 err = inode_change_ok(inode, attr);
1690 if (err != 0)
1691 return err;
1692
1693 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1694 USE_AUTH_MDS);
1695 if (IS_ERR(req))
1696 return PTR_ERR(req);
1697
1698 spin_lock(&ci->i_ceph_lock);
1699 issued = __ceph_caps_issued(ci, NULL);
1700 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1701
1702 if (ia_valid & ATTR_UID) {
1703 dout("setattr %p uid %d -> %d\n", inode,
1704 from_kuid(&init_user_ns, inode->i_uid),
1705 from_kuid(&init_user_ns, attr->ia_uid));
1706 if (issued & CEPH_CAP_AUTH_EXCL) {
1707 inode->i_uid = attr->ia_uid;
1708 dirtied |= CEPH_CAP_AUTH_EXCL;
1709 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1710 !uid_eq(attr->ia_uid, inode->i_uid)) {
1711 req->r_args.setattr.uid = cpu_to_le32(
1712 from_kuid(&init_user_ns, attr->ia_uid));
1713 mask |= CEPH_SETATTR_UID;
1714 release |= CEPH_CAP_AUTH_SHARED;
1715 }
1716 }
1717 if (ia_valid & ATTR_GID) {
1718 dout("setattr %p gid %d -> %d\n", inode,
1719 from_kgid(&init_user_ns, inode->i_gid),
1720 from_kgid(&init_user_ns, attr->ia_gid));
1721 if (issued & CEPH_CAP_AUTH_EXCL) {
1722 inode->i_gid = attr->ia_gid;
1723 dirtied |= CEPH_CAP_AUTH_EXCL;
1724 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1725 !gid_eq(attr->ia_gid, inode->i_gid)) {
1726 req->r_args.setattr.gid = cpu_to_le32(
1727 from_kgid(&init_user_ns, attr->ia_gid));
1728 mask |= CEPH_SETATTR_GID;
1729 release |= CEPH_CAP_AUTH_SHARED;
1730 }
1731 }
1732 if (ia_valid & ATTR_MODE) {
1733 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1734 attr->ia_mode);
1735 if (issued & CEPH_CAP_AUTH_EXCL) {
1736 inode->i_mode = attr->ia_mode;
1737 dirtied |= CEPH_CAP_AUTH_EXCL;
1738 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1739 attr->ia_mode != inode->i_mode) {
1740 inode->i_mode = attr->ia_mode;
1741 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1742 mask |= CEPH_SETATTR_MODE;
1743 release |= CEPH_CAP_AUTH_SHARED;
1744 }
1745 }
1746
1747 if (ia_valid & ATTR_ATIME) {
1748 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1749 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1750 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1751 if (issued & CEPH_CAP_FILE_EXCL) {
1752 ci->i_time_warp_seq++;
1753 inode->i_atime = attr->ia_atime;
1754 dirtied |= CEPH_CAP_FILE_EXCL;
1755 } else if ((issued & CEPH_CAP_FILE_WR) &&
1756 timespec_compare(&inode->i_atime,
1757 &attr->ia_atime) < 0) {
1758 inode->i_atime = attr->ia_atime;
1759 dirtied |= CEPH_CAP_FILE_WR;
1760 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1761 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
1762 ceph_encode_timespec(&req->r_args.setattr.atime,
1763 &attr->ia_atime);
1764 mask |= CEPH_SETATTR_ATIME;
1765 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
1766 CEPH_CAP_FILE_WR;
1767 }
1768 }
1769 if (ia_valid & ATTR_MTIME) {
1770 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
1771 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
1772 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
1773 if (issued & CEPH_CAP_FILE_EXCL) {
1774 ci->i_time_warp_seq++;
1775 inode->i_mtime = attr->ia_mtime;
1776 dirtied |= CEPH_CAP_FILE_EXCL;
1777 } else if ((issued & CEPH_CAP_FILE_WR) &&
1778 timespec_compare(&inode->i_mtime,
1779 &attr->ia_mtime) < 0) {
1780 inode->i_mtime = attr->ia_mtime;
1781 dirtied |= CEPH_CAP_FILE_WR;
1782 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1783 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
1784 ceph_encode_timespec(&req->r_args.setattr.mtime,
1785 &attr->ia_mtime);
1786 mask |= CEPH_SETATTR_MTIME;
1787 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1788 CEPH_CAP_FILE_WR;
1789 }
1790 }
1791 if (ia_valid & ATTR_SIZE) {
1792 dout("setattr %p size %lld -> %lld\n", inode,
1793 inode->i_size, attr->ia_size);
1794 if (attr->ia_size > inode->i_sb->s_maxbytes) {
1795 err = -EINVAL;
1796 goto out;
1797 }
1798 if ((issued & CEPH_CAP_FILE_EXCL) &&
1799 attr->ia_size > inode->i_size) {
1800 inode->i_size = attr->ia_size;
1801 inode->i_blocks =
1802 (attr->ia_size + (1 << 9) - 1) >> 9;
1803 inode->i_ctime = attr->ia_ctime;
1804 ci->i_reported_size = attr->ia_size;
1805 dirtied |= CEPH_CAP_FILE_EXCL;
1806 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1807 attr->ia_size != inode->i_size) {
1808 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
1809 req->r_args.setattr.old_size =
1810 cpu_to_le64(inode->i_size);
1811 mask |= CEPH_SETATTR_SIZE;
1812 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1813 CEPH_CAP_FILE_WR;
1814 }
1815 }
1816
1817 /* these do nothing */
1818 if (ia_valid & ATTR_CTIME) {
1819 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
1820 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
1821 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
1822 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
1823 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
1824 only ? "ctime only" : "ignored");
1825 inode->i_ctime = attr->ia_ctime;
1826 if (only) {
1827 /*
1828 * if kernel wants to dirty ctime but nothing else,
1829 * we need to choose a cap to dirty under, or do
1830 * a almost-no-op setattr
1831 */
1832 if (issued & CEPH_CAP_AUTH_EXCL)
1833 dirtied |= CEPH_CAP_AUTH_EXCL;
1834 else if (issued & CEPH_CAP_FILE_EXCL)
1835 dirtied |= CEPH_CAP_FILE_EXCL;
1836 else if (issued & CEPH_CAP_XATTR_EXCL)
1837 dirtied |= CEPH_CAP_XATTR_EXCL;
1838 else
1839 mask |= CEPH_SETATTR_CTIME;
1840 }
1841 }
1842 if (ia_valid & ATTR_FILE)
1843 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
1844
1845 if (dirtied) {
1846 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied);
1847 inode->i_ctime = CURRENT_TIME;
1848 }
1849
1850 release &= issued;
1851 spin_unlock(&ci->i_ceph_lock);
1852
1853 if (inode_dirty_flags)
1854 __mark_inode_dirty(inode, inode_dirty_flags);
1855
1856 if (ia_valid & ATTR_MODE) {
1857 err = posix_acl_chmod(inode, attr->ia_mode);
1858 if (err)
1859 goto out_put;
1860 }
1861
1862 if (mask) {
1863 req->r_inode = inode;
1864 ihold(inode);
1865 req->r_inode_drop = release;
1866 req->r_args.setattr.mask = cpu_to_le32(mask);
1867 req->r_num_caps = 1;
1868 err = ceph_mdsc_do_request(mdsc, NULL, req);
1869 }
1870 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
1871 ceph_cap_string(dirtied), mask);
1872
1873 ceph_mdsc_put_request(req);
1874 if (mask & CEPH_SETATTR_SIZE)
1875 __ceph_do_pending_vmtruncate(inode);
1876 return err;
1877 out:
1878 spin_unlock(&ci->i_ceph_lock);
1879 out_put:
1880 ceph_mdsc_put_request(req);
1881 return err;
1882 }
1883
1884 /*
1885 * Verify that we have a lease on the given mask. If not,
1886 * do a getattr against an mds.
1887 */
1888 int ceph_do_getattr(struct inode *inode, int mask)
1889 {
1890 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
1891 struct ceph_mds_client *mdsc = fsc->mdsc;
1892 struct ceph_mds_request *req;
1893 int err;
1894
1895 if (ceph_snap(inode) == CEPH_SNAPDIR) {
1896 dout("do_getattr inode %p SNAPDIR\n", inode);
1897 return 0;
1898 }
1899
1900 dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode);
1901 if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
1902 return 0;
1903
1904 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
1905 if (IS_ERR(req))
1906 return PTR_ERR(req);
1907 req->r_inode = inode;
1908 ihold(inode);
1909 req->r_num_caps = 1;
1910 req->r_args.getattr.mask = cpu_to_le32(mask);
1911 err = ceph_mdsc_do_request(mdsc, NULL, req);
1912 ceph_mdsc_put_request(req);
1913 dout("do_getattr result=%d\n", err);
1914 return err;
1915 }
1916
1917
1918 /*
1919 * Check inode permissions. We verify we have a valid value for
1920 * the AUTH cap, then call the generic handler.
1921 */
1922 int ceph_permission(struct inode *inode, int mask)
1923 {
1924 int err;
1925
1926 if (mask & MAY_NOT_BLOCK)
1927 return -ECHILD;
1928
1929 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
1930
1931 if (!err)
1932 err = generic_permission(inode, mask);
1933 return err;
1934 }
1935
1936 /*
1937 * Get all attributes. Hopefully somedata we'll have a statlite()
1938 * and can limit the fields we require to be accurate.
1939 */
1940 int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
1941 struct kstat *stat)
1942 {
1943 struct inode *inode = dentry->d_inode;
1944 struct ceph_inode_info *ci = ceph_inode(inode);
1945 int err;
1946
1947 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
1948 if (!err) {
1949 generic_fillattr(inode, stat);
1950 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
1951 if (ceph_snap(inode) != CEPH_NOSNAP)
1952 stat->dev = ceph_snap(inode);
1953 else
1954 stat->dev = 0;
1955 if (S_ISDIR(inode->i_mode)) {
1956 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
1957 RBYTES))
1958 stat->size = ci->i_rbytes;
1959 else
1960 stat->size = ci->i_files + ci->i_subdirs;
1961 stat->blocks = 0;
1962 stat->blksize = 65536;
1963 }
1964 }
1965 return err;
1966 }
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