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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
13#include "super.h"
14#include "mds_client.h"
15#include <linux/ceph/decode.h>
16
17/*
18 * Ceph inode operations
19 *
20 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
21 * setattr, etc.), xattr helpers, and helpers for assimilating
22 * metadata returned by the MDS into our cache.
23 *
24 * Also define helpers for doing asynchronous writeback, invalidation,
25 * and truncation for the benefit of those who can't afford to block
26 * (typically because they are in the message handler path).
27 */
28
29static const struct inode_operations ceph_symlink_iops;
30
31static void ceph_invalidate_work(struct work_struct *work);
32static void ceph_writeback_work(struct work_struct *work);
33static void ceph_vmtruncate_work(struct work_struct *work);
34
35/*
36 * find or create an inode, given the ceph ino number
37 */
38static int ceph_set_ino_cb(struct inode *inode, void *data)
39{
40 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
41 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
42 return 0;
43}
44
45struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
46{
47 struct inode *inode;
48 ino_t t = ceph_vino_to_ino(vino);
49
50 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
51 if (inode == NULL)
52 return ERR_PTR(-ENOMEM);
53 if (inode->i_state & I_NEW) {
54 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
55 inode, ceph_vinop(inode), (u64)inode->i_ino);
56 unlock_new_inode(inode);
57 }
58
59 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
60 vino.snap, inode);
61 return inode;
62}
63
64/*
65 * get/constuct snapdir inode for a given directory
66 */
67struct inode *ceph_get_snapdir(struct inode *parent)
68{
69 struct ceph_vino vino = {
70 .ino = ceph_ino(parent),
71 .snap = CEPH_SNAPDIR,
72 };
73 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
74 struct ceph_inode_info *ci = ceph_inode(inode);
75
76 BUG_ON(!S_ISDIR(parent->i_mode));
77 if (IS_ERR(inode))
78 return inode;
79 inode->i_mode = parent->i_mode;
80 inode->i_uid = parent->i_uid;
81 inode->i_gid = parent->i_gid;
82 inode->i_op = &ceph_dir_iops;
83 inode->i_fop = &ceph_dir_fops;
84 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
85 ci->i_rbytes = 0;
86 return inode;
87}
88
89const struct inode_operations ceph_file_iops = {
90 .permission = ceph_permission,
91 .setattr = ceph_setattr,
92 .getattr = ceph_getattr,
93 .setxattr = ceph_setxattr,
94 .getxattr = ceph_getxattr,
95 .listxattr = ceph_listxattr,
96 .removexattr = ceph_removexattr,
97};
98
99
100/*
101 * We use a 'frag tree' to keep track of the MDS's directory fragments
102 * for a given inode (usually there is just a single fragment). We
103 * need to know when a child frag is delegated to a new MDS, or when
104 * it is flagged as replicated, so we can direct our requests
105 * accordingly.
106 */
107
108/*
109 * find/create a frag in the tree
110 */
111static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
112 u32 f)
113{
114 struct rb_node **p;
115 struct rb_node *parent = NULL;
116 struct ceph_inode_frag *frag;
117 int c;
118
119 p = &ci->i_fragtree.rb_node;
120 while (*p) {
121 parent = *p;
122 frag = rb_entry(parent, struct ceph_inode_frag, node);
123 c = ceph_frag_compare(f, frag->frag);
124 if (c < 0)
125 p = &(*p)->rb_left;
126 else if (c > 0)
127 p = &(*p)->rb_right;
128 else
129 return frag;
130 }
131
132 frag = kmalloc(sizeof(*frag), GFP_NOFS);
133 if (!frag) {
134 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
135 "frag %x\n", &ci->vfs_inode,
136 ceph_vinop(&ci->vfs_inode), f);
137 return ERR_PTR(-ENOMEM);
138 }
139 frag->frag = f;
140 frag->split_by = 0;
141 frag->mds = -1;
142 frag->ndist = 0;
143
144 rb_link_node(&frag->node, parent, p);
145 rb_insert_color(&frag->node, &ci->i_fragtree);
146
147 dout("get_or_create_frag added %llx.%llx frag %x\n",
148 ceph_vinop(&ci->vfs_inode), f);
149 return frag;
150}
151
152/*
153 * find a specific frag @f
154 */
155struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
156{
157 struct rb_node *n = ci->i_fragtree.rb_node;
158
159 while (n) {
160 struct ceph_inode_frag *frag =
161 rb_entry(n, struct ceph_inode_frag, node);
162 int c = ceph_frag_compare(f, frag->frag);
163 if (c < 0)
164 n = n->rb_left;
165 else if (c > 0)
166 n = n->rb_right;
167 else
168 return frag;
169 }
170 return NULL;
171}
172
173/*
174 * Choose frag containing the given value @v. If @pfrag is
175 * specified, copy the frag delegation info to the caller if
176 * it is present.
177 */
178u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
179 struct ceph_inode_frag *pfrag,
180 int *found)
181{
182 u32 t = ceph_frag_make(0, 0);
183 struct ceph_inode_frag *frag;
184 unsigned nway, i;
185 u32 n;
186
187 if (found)
188 *found = 0;
189
190 mutex_lock(&ci->i_fragtree_mutex);
191 while (1) {
192 WARN_ON(!ceph_frag_contains_value(t, v));
193 frag = __ceph_find_frag(ci, t);
194 if (!frag)
195 break; /* t is a leaf */
196 if (frag->split_by == 0) {
197 if (pfrag)
198 memcpy(pfrag, frag, sizeof(*pfrag));
199 if (found)
200 *found = 1;
201 break;
202 }
203
204 /* choose child */
205 nway = 1 << frag->split_by;
206 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
207 frag->split_by, nway);
208 for (i = 0; i < nway; i++) {
209 n = ceph_frag_make_child(t, frag->split_by, i);
210 if (ceph_frag_contains_value(n, v)) {
211 t = n;
212 break;
213 }
214 }
215 BUG_ON(i == nway);
216 }
217 dout("choose_frag(%x) = %x\n", v, t);
218
219 mutex_unlock(&ci->i_fragtree_mutex);
220 return t;
221}
222
223/*
224 * Process dirfrag (delegation) info from the mds. Include leaf
225 * fragment in tree ONLY if ndist > 0. Otherwise, only
226 * branches/splits are included in i_fragtree)
227 */
228static int ceph_fill_dirfrag(struct inode *inode,
229 struct ceph_mds_reply_dirfrag *dirinfo)
230{
231 struct ceph_inode_info *ci = ceph_inode(inode);
232 struct ceph_inode_frag *frag;
233 u32 id = le32_to_cpu(dirinfo->frag);
234 int mds = le32_to_cpu(dirinfo->auth);
235 int ndist = le32_to_cpu(dirinfo->ndist);
236 int i;
237 int err = 0;
238
239 mutex_lock(&ci->i_fragtree_mutex);
240 if (ndist == 0) {
241 /* no delegation info needed. */
242 frag = __ceph_find_frag(ci, id);
243 if (!frag)
244 goto out;
245 if (frag->split_by == 0) {
246 /* tree leaf, remove */
247 dout("fill_dirfrag removed %llx.%llx frag %x"
248 " (no ref)\n", ceph_vinop(inode), id);
249 rb_erase(&frag->node, &ci->i_fragtree);
250 kfree(frag);
251 } else {
252 /* tree branch, keep and clear */
253 dout("fill_dirfrag cleared %llx.%llx frag %x"
254 " referral\n", ceph_vinop(inode), id);
255 frag->mds = -1;
256 frag->ndist = 0;
257 }
258 goto out;
259 }
260
261
262 /* find/add this frag to store mds delegation info */
263 frag = __get_or_create_frag(ci, id);
264 if (IS_ERR(frag)) {
265 /* this is not the end of the world; we can continue
266 with bad/inaccurate delegation info */
267 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
268 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
269 err = -ENOMEM;
270 goto out;
271 }
272
273 frag->mds = mds;
274 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
275 for (i = 0; i < frag->ndist; i++)
276 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
277 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
278 ceph_vinop(inode), frag->frag, frag->ndist);
279
280out:
281 mutex_unlock(&ci->i_fragtree_mutex);
282 return err;
283}
284
285
286/*
287 * initialize a newly allocated inode.
288 */
289struct inode *ceph_alloc_inode(struct super_block *sb)
290{
291 struct ceph_inode_info *ci;
292 int i;
293
294 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
295 if (!ci)
296 return NULL;
297
298 dout("alloc_inode %p\n", &ci->vfs_inode);
299
300 spin_lock_init(&ci->i_ceph_lock);
301
302 ci->i_version = 0;
303 ci->i_time_warp_seq = 0;
304 ci->i_ceph_flags = 0;
305 ci->i_release_count = 0;
306 ci->i_symlink = NULL;
307
308 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
309
310 ci->i_fragtree = RB_ROOT;
311 mutex_init(&ci->i_fragtree_mutex);
312
313 ci->i_xattrs.blob = NULL;
314 ci->i_xattrs.prealloc_blob = NULL;
315 ci->i_xattrs.dirty = false;
316 ci->i_xattrs.index = RB_ROOT;
317 ci->i_xattrs.count = 0;
318 ci->i_xattrs.names_size = 0;
319 ci->i_xattrs.vals_size = 0;
320 ci->i_xattrs.version = 0;
321 ci->i_xattrs.index_version = 0;
322
323 ci->i_caps = RB_ROOT;
324 ci->i_auth_cap = NULL;
325 ci->i_dirty_caps = 0;
326 ci->i_flushing_caps = 0;
327 INIT_LIST_HEAD(&ci->i_dirty_item);
328 INIT_LIST_HEAD(&ci->i_flushing_item);
329 ci->i_cap_flush_seq = 0;
330 ci->i_cap_flush_last_tid = 0;
331 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid));
332 init_waitqueue_head(&ci->i_cap_wq);
333 ci->i_hold_caps_min = 0;
334 ci->i_hold_caps_max = 0;
335 INIT_LIST_HEAD(&ci->i_cap_delay_list);
336 ci->i_cap_exporting_mds = 0;
337 ci->i_cap_exporting_mseq = 0;
338 ci->i_cap_exporting_issued = 0;
339 INIT_LIST_HEAD(&ci->i_cap_snaps);
340 ci->i_head_snapc = NULL;
341 ci->i_snap_caps = 0;
342
343 for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
344 ci->i_nr_by_mode[i] = 0;
345
346 ci->i_truncate_seq = 0;
347 ci->i_truncate_size = 0;
348 ci->i_truncate_pending = 0;
349
350 ci->i_max_size = 0;
351 ci->i_reported_size = 0;
352 ci->i_wanted_max_size = 0;
353 ci->i_requested_max_size = 0;
354
355 ci->i_pin_ref = 0;
356 ci->i_rd_ref = 0;
357 ci->i_rdcache_ref = 0;
358 ci->i_wr_ref = 0;
359 ci->i_wb_ref = 0;
360 ci->i_wrbuffer_ref = 0;
361 ci->i_wrbuffer_ref_head = 0;
362 ci->i_shared_gen = 0;
363 ci->i_rdcache_gen = 0;
364 ci->i_rdcache_revoking = 0;
365
366 INIT_LIST_HEAD(&ci->i_unsafe_writes);
367 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
368 spin_lock_init(&ci->i_unsafe_lock);
369
370 ci->i_snap_realm = NULL;
371 INIT_LIST_HEAD(&ci->i_snap_realm_item);
372 INIT_LIST_HEAD(&ci->i_snap_flush_item);
373
374 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
375 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
376
377 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
378
379 return &ci->vfs_inode;
380}
381
382static void ceph_i_callback(struct rcu_head *head)
383{
384 struct inode *inode = container_of(head, struct inode, i_rcu);
385 struct ceph_inode_info *ci = ceph_inode(inode);
386
387 kmem_cache_free(ceph_inode_cachep, ci);
388}
389
390void ceph_destroy_inode(struct inode *inode)
391{
392 struct ceph_inode_info *ci = ceph_inode(inode);
393 struct ceph_inode_frag *frag;
394 struct rb_node *n;
395
396 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
397
398 ceph_queue_caps_release(inode);
399
400 /*
401 * we may still have a snap_realm reference if there are stray
402 * caps in i_cap_exporting_issued or i_snap_caps.
403 */
404 if (ci->i_snap_realm) {
405 struct ceph_mds_client *mdsc =
406 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
407 struct ceph_snap_realm *realm = ci->i_snap_realm;
408
409 dout(" dropping residual ref to snap realm %p\n", realm);
410 spin_lock(&realm->inodes_with_caps_lock);
411 list_del_init(&ci->i_snap_realm_item);
412 spin_unlock(&realm->inodes_with_caps_lock);
413 ceph_put_snap_realm(mdsc, realm);
414 }
415
416 kfree(ci->i_symlink);
417 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
418 frag = rb_entry(n, struct ceph_inode_frag, node);
419 rb_erase(n, &ci->i_fragtree);
420 kfree(frag);
421 }
422
423 __ceph_destroy_xattrs(ci);
424 if (ci->i_xattrs.blob)
425 ceph_buffer_put(ci->i_xattrs.blob);
426 if (ci->i_xattrs.prealloc_blob)
427 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
428
429 call_rcu(&inode->i_rcu, ceph_i_callback);
430}
431
432
433/*
434 * Helpers to fill in size, ctime, mtime, and atime. We have to be
435 * careful because either the client or MDS may have more up to date
436 * info, depending on which capabilities are held, and whether
437 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
438 * and size are monotonically increasing, except when utimes() or
439 * truncate() increments the corresponding _seq values.)
440 */
441int ceph_fill_file_size(struct inode *inode, int issued,
442 u32 truncate_seq, u64 truncate_size, u64 size)
443{
444 struct ceph_inode_info *ci = ceph_inode(inode);
445 int queue_trunc = 0;
446
447 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
448 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
449 dout("size %lld -> %llu\n", inode->i_size, size);
450 inode->i_size = size;
451 inode->i_blocks = (size + (1<<9) - 1) >> 9;
452 ci->i_reported_size = size;
453 if (truncate_seq != ci->i_truncate_seq) {
454 dout("truncate_seq %u -> %u\n",
455 ci->i_truncate_seq, truncate_seq);
456 ci->i_truncate_seq = truncate_seq;
457 /*
458 * If we hold relevant caps, or in the case where we're
459 * not the only client referencing this file and we
460 * don't hold those caps, then we need to check whether
461 * the file is either opened or mmaped
462 */
463 if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD|
464 CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER|
465 CEPH_CAP_FILE_EXCL|
466 CEPH_CAP_FILE_LAZYIO)) ||
467 mapping_mapped(inode->i_mapping) ||
468 __ceph_caps_file_wanted(ci)) {
469 ci->i_truncate_pending++;
470 queue_trunc = 1;
471 }
472 }
473 }
474 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
475 ci->i_truncate_size != truncate_size) {
476 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
477 truncate_size);
478 ci->i_truncate_size = truncate_size;
479 }
480 return queue_trunc;
481}
482
483void ceph_fill_file_time(struct inode *inode, int issued,
484 u64 time_warp_seq, struct timespec *ctime,
485 struct timespec *mtime, struct timespec *atime)
486{
487 struct ceph_inode_info *ci = ceph_inode(inode);
488 int warn = 0;
489
490 if (issued & (CEPH_CAP_FILE_EXCL|
491 CEPH_CAP_FILE_WR|
492 CEPH_CAP_FILE_BUFFER|
493 CEPH_CAP_AUTH_EXCL|
494 CEPH_CAP_XATTR_EXCL)) {
495 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
496 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
497 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
498 ctime->tv_sec, ctime->tv_nsec);
499 inode->i_ctime = *ctime;
500 }
501 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
502 /* the MDS did a utimes() */
503 dout("mtime %ld.%09ld -> %ld.%09ld "
504 "tw %d -> %d\n",
505 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
506 mtime->tv_sec, mtime->tv_nsec,
507 ci->i_time_warp_seq, (int)time_warp_seq);
508
509 inode->i_mtime = *mtime;
510 inode->i_atime = *atime;
511 ci->i_time_warp_seq = time_warp_seq;
512 } else if (time_warp_seq == ci->i_time_warp_seq) {
513 /* nobody did utimes(); take the max */
514 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
515 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
516 inode->i_mtime.tv_sec,
517 inode->i_mtime.tv_nsec,
518 mtime->tv_sec, mtime->tv_nsec);
519 inode->i_mtime = *mtime;
520 }
521 if (timespec_compare(atime, &inode->i_atime) > 0) {
522 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
523 inode->i_atime.tv_sec,
524 inode->i_atime.tv_nsec,
525 atime->tv_sec, atime->tv_nsec);
526 inode->i_atime = *atime;
527 }
528 } else if (issued & CEPH_CAP_FILE_EXCL) {
529 /* we did a utimes(); ignore mds values */
530 } else {
531 warn = 1;
532 }
533 } else {
534 /* we have no write|excl caps; whatever the MDS says is true */
535 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
536 inode->i_ctime = *ctime;
537 inode->i_mtime = *mtime;
538 inode->i_atime = *atime;
539 ci->i_time_warp_seq = time_warp_seq;
540 } else {
541 warn = 1;
542 }
543 }
544 if (warn) /* time_warp_seq shouldn't go backwards */
545 dout("%p mds time_warp_seq %llu < %u\n",
546 inode, time_warp_seq, ci->i_time_warp_seq);
547}
548
549/*
550 * Populate an inode based on info from mds. May be called on new or
551 * existing inodes.
552 */
553static int fill_inode(struct inode *inode,
554 struct ceph_mds_reply_info_in *iinfo,
555 struct ceph_mds_reply_dirfrag *dirinfo,
556 struct ceph_mds_session *session,
557 unsigned long ttl_from, int cap_fmode,
558 struct ceph_cap_reservation *caps_reservation)
559{
560 struct ceph_mds_reply_inode *info = iinfo->in;
561 struct ceph_inode_info *ci = ceph_inode(inode);
562 int i;
563 int issued = 0, implemented;
564 int updating_inode = 0;
565 struct timespec mtime, atime, ctime;
566 u32 nsplits;
567 struct ceph_buffer *xattr_blob = NULL;
568 int err = 0;
569 int queue_trunc = 0;
570
571 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
572 inode, ceph_vinop(inode), le64_to_cpu(info->version),
573 ci->i_version);
574
575 /*
576 * prealloc xattr data, if it looks like we'll need it. only
577 * if len > 4 (meaning there are actually xattrs; the first 4
578 * bytes are the xattr count).
579 */
580 if (iinfo->xattr_len > 4) {
581 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
582 if (!xattr_blob)
583 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
584 iinfo->xattr_len);
585 }
586
587 spin_lock(&ci->i_ceph_lock);
588
589 /*
590 * provided version will be odd if inode value is projected,
591 * even if stable. skip the update if we have newer stable
592 * info (ours>=theirs, e.g. due to racing mds replies), unless
593 * we are getting projected (unstable) info (in which case the
594 * version is odd, and we want ours>theirs).
595 * us them
596 * 2 2 skip
597 * 3 2 skip
598 * 3 3 update
599 */
600 if (le64_to_cpu(info->version) > 0 &&
601 (ci->i_version & ~1) >= le64_to_cpu(info->version))
602 goto no_change;
603
604 updating_inode = 1;
605 issued = __ceph_caps_issued(ci, &implemented);
606 issued |= implemented | __ceph_caps_dirty(ci);
607
608 /* update inode */
609 ci->i_version = le64_to_cpu(info->version);
610 inode->i_version++;
611 inode->i_rdev = le32_to_cpu(info->rdev);
612
613 if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
614 inode->i_mode = le32_to_cpu(info->mode);
615 inode->i_uid = le32_to_cpu(info->uid);
616 inode->i_gid = le32_to_cpu(info->gid);
617 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
618 inode->i_uid, inode->i_gid);
619 }
620
621 if ((issued & CEPH_CAP_LINK_EXCL) == 0)
622 set_nlink(inode, le32_to_cpu(info->nlink));
623
624 /* be careful with mtime, atime, size */
625 ceph_decode_timespec(&atime, &info->atime);
626 ceph_decode_timespec(&mtime, &info->mtime);
627 ceph_decode_timespec(&ctime, &info->ctime);
628 queue_trunc = ceph_fill_file_size(inode, issued,
629 le32_to_cpu(info->truncate_seq),
630 le64_to_cpu(info->truncate_size),
631 le64_to_cpu(info->size));
632 ceph_fill_file_time(inode, issued,
633 le32_to_cpu(info->time_warp_seq),
634 &ctime, &mtime, &atime);
635
636 /* only update max_size on auth cap */
637 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
638 ci->i_max_size != le64_to_cpu(info->max_size)) {
639 dout("max_size %lld -> %llu\n", ci->i_max_size,
640 le64_to_cpu(info->max_size));
641 ci->i_max_size = le64_to_cpu(info->max_size);
642 }
643
644 ci->i_layout = info->layout;
645 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
646
647 /* xattrs */
648 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
649 if ((issued & CEPH_CAP_XATTR_EXCL) == 0 &&
650 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
651 if (ci->i_xattrs.blob)
652 ceph_buffer_put(ci->i_xattrs.blob);
653 ci->i_xattrs.blob = xattr_blob;
654 if (xattr_blob)
655 memcpy(ci->i_xattrs.blob->vec.iov_base,
656 iinfo->xattr_data, iinfo->xattr_len);
657 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
658 xattr_blob = NULL;
659 }
660
661 inode->i_mapping->a_ops = &ceph_aops;
662 inode->i_mapping->backing_dev_info =
663 &ceph_sb_to_client(inode->i_sb)->backing_dev_info;
664
665 switch (inode->i_mode & S_IFMT) {
666 case S_IFIFO:
667 case S_IFBLK:
668 case S_IFCHR:
669 case S_IFSOCK:
670 init_special_inode(inode, inode->i_mode, inode->i_rdev);
671 inode->i_op = &ceph_file_iops;
672 break;
673 case S_IFREG:
674 inode->i_op = &ceph_file_iops;
675 inode->i_fop = &ceph_file_fops;
676 break;
677 case S_IFLNK:
678 inode->i_op = &ceph_symlink_iops;
679 if (!ci->i_symlink) {
680 u32 symlen = iinfo->symlink_len;
681 char *sym;
682
683 spin_unlock(&ci->i_ceph_lock);
684
685 err = -EINVAL;
686 if (WARN_ON(symlen != inode->i_size))
687 goto out;
688
689 err = -ENOMEM;
690 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
691 if (!sym)
692 goto out;
693
694 spin_lock(&ci->i_ceph_lock);
695 if (!ci->i_symlink)
696 ci->i_symlink = sym;
697 else
698 kfree(sym); /* lost a race */
699 }
700 break;
701 case S_IFDIR:
702 inode->i_op = &ceph_dir_iops;
703 inode->i_fop = &ceph_dir_fops;
704
705 ci->i_dir_layout = iinfo->dir_layout;
706
707 ci->i_files = le64_to_cpu(info->files);
708 ci->i_subdirs = le64_to_cpu(info->subdirs);
709 ci->i_rbytes = le64_to_cpu(info->rbytes);
710 ci->i_rfiles = le64_to_cpu(info->rfiles);
711 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
712 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
713 break;
714 default:
715 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
716 ceph_vinop(inode), inode->i_mode);
717 }
718
719no_change:
720 spin_unlock(&ci->i_ceph_lock);
721
722 /* queue truncate if we saw i_size decrease */
723 if (queue_trunc)
724 ceph_queue_vmtruncate(inode);
725
726 /* populate frag tree */
727 /* FIXME: move me up, if/when version reflects fragtree changes */
728 nsplits = le32_to_cpu(info->fragtree.nsplits);
729 mutex_lock(&ci->i_fragtree_mutex);
730 for (i = 0; i < nsplits; i++) {
731 u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
732 struct ceph_inode_frag *frag = __get_or_create_frag(ci, id);
733
734 if (IS_ERR(frag))
735 continue;
736 frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
737 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
738 }
739 mutex_unlock(&ci->i_fragtree_mutex);
740
741 /* were we issued a capability? */
742 if (info->cap.caps) {
743 if (ceph_snap(inode) == CEPH_NOSNAP) {
744 ceph_add_cap(inode, session,
745 le64_to_cpu(info->cap.cap_id),
746 cap_fmode,
747 le32_to_cpu(info->cap.caps),
748 le32_to_cpu(info->cap.wanted),
749 le32_to_cpu(info->cap.seq),
750 le32_to_cpu(info->cap.mseq),
751 le64_to_cpu(info->cap.realm),
752 info->cap.flags,
753 caps_reservation);
754 } else {
755 spin_lock(&ci->i_ceph_lock);
756 dout(" %p got snap_caps %s\n", inode,
757 ceph_cap_string(le32_to_cpu(info->cap.caps)));
758 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
759 if (cap_fmode >= 0)
760 __ceph_get_fmode(ci, cap_fmode);
761 spin_unlock(&ci->i_ceph_lock);
762 }
763 } else if (cap_fmode >= 0) {
764 pr_warning("mds issued no caps on %llx.%llx\n",
765 ceph_vinop(inode));
766 __ceph_get_fmode(ci, cap_fmode);
767 }
768
769 /* set dir completion flag? */
770 if (S_ISDIR(inode->i_mode) &&
771 updating_inode && /* didn't jump to no_change */
772 ci->i_files == 0 && ci->i_subdirs == 0 &&
773 ceph_snap(inode) == CEPH_NOSNAP &&
774 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
775 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
776 !ceph_dir_test_complete(inode)) {
777 dout(" marking %p complete (empty)\n", inode);
778 ceph_dir_set_complete(inode);
779 ci->i_max_offset = 2;
780 }
781
782 /* update delegation info? */
783 if (dirinfo)
784 ceph_fill_dirfrag(inode, dirinfo);
785
786 err = 0;
787
788out:
789 if (xattr_blob)
790 ceph_buffer_put(xattr_blob);
791 return err;
792}
793
794/*
795 * caller should hold session s_mutex.
796 */
797static void update_dentry_lease(struct dentry *dentry,
798 struct ceph_mds_reply_lease *lease,
799 struct ceph_mds_session *session,
800 unsigned long from_time)
801{
802 struct ceph_dentry_info *di = ceph_dentry(dentry);
803 long unsigned duration = le32_to_cpu(lease->duration_ms);
804 long unsigned ttl = from_time + (duration * HZ) / 1000;
805 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
806 struct inode *dir;
807
808 /* only track leases on regular dentries */
809 if (dentry->d_op != &ceph_dentry_ops)
810 return;
811
812 spin_lock(&dentry->d_lock);
813 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
814 dentry, duration, ttl);
815
816 /* make lease_rdcache_gen match directory */
817 dir = dentry->d_parent->d_inode;
818 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
819
820 if (duration == 0)
821 goto out_unlock;
822
823 if (di->lease_gen == session->s_cap_gen &&
824 time_before(ttl, dentry->d_time))
825 goto out_unlock; /* we already have a newer lease. */
826
827 if (di->lease_session && di->lease_session != session)
828 goto out_unlock;
829
830 ceph_dentry_lru_touch(dentry);
831
832 if (!di->lease_session)
833 di->lease_session = ceph_get_mds_session(session);
834 di->lease_gen = session->s_cap_gen;
835 di->lease_seq = le32_to_cpu(lease->seq);
836 di->lease_renew_after = half_ttl;
837 di->lease_renew_from = 0;
838 dentry->d_time = ttl;
839out_unlock:
840 spin_unlock(&dentry->d_lock);
841 return;
842}
843
844/*
845 * Set dentry's directory position based on the current dir's max, and
846 * order it in d_subdirs, so that dcache_readdir behaves.
847 *
848 * Always called under directory's i_mutex.
849 */
850static void ceph_set_dentry_offset(struct dentry *dn)
851{
852 struct dentry *dir = dn->d_parent;
853 struct inode *inode = dir->d_inode;
854 struct ceph_inode_info *ci;
855 struct ceph_dentry_info *di;
856
857 BUG_ON(!inode);
858
859 ci = ceph_inode(inode);
860 di = ceph_dentry(dn);
861
862 spin_lock(&ci->i_ceph_lock);
863 if (!ceph_dir_test_complete(inode)) {
864 spin_unlock(&ci->i_ceph_lock);
865 return;
866 }
867 di->offset = ceph_inode(inode)->i_max_offset++;
868 spin_unlock(&ci->i_ceph_lock);
869
870 spin_lock(&dir->d_lock);
871 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
872 list_move(&dn->d_u.d_child, &dir->d_subdirs);
873 dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset,
874 dn->d_u.d_child.prev, dn->d_u.d_child.next);
875 spin_unlock(&dn->d_lock);
876 spin_unlock(&dir->d_lock);
877}
878
879/*
880 * splice a dentry to an inode.
881 * caller must hold directory i_mutex for this to be safe.
882 *
883 * we will only rehash the resulting dentry if @prehash is
884 * true; @prehash will be set to false (for the benefit of
885 * the caller) if we fail.
886 */
887static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
888 bool *prehash, bool set_offset)
889{
890 struct dentry *realdn;
891
892 BUG_ON(dn->d_inode);
893
894 /* dn must be unhashed */
895 if (!d_unhashed(dn))
896 d_drop(dn);
897 realdn = d_materialise_unique(dn, in);
898 if (IS_ERR(realdn)) {
899 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
900 PTR_ERR(realdn), dn, in, ceph_vinop(in));
901 if (prehash)
902 *prehash = false; /* don't rehash on error */
903 dn = realdn; /* note realdn contains the error */
904 goto out;
905 } else if (realdn) {
906 dout("dn %p (%d) spliced with %p (%d) "
907 "inode %p ino %llx.%llx\n",
908 dn, dn->d_count,
909 realdn, realdn->d_count,
910 realdn->d_inode, ceph_vinop(realdn->d_inode));
911 dput(dn);
912 dn = realdn;
913 } else {
914 BUG_ON(!ceph_dentry(dn));
915 dout("dn %p attached to %p ino %llx.%llx\n",
916 dn, dn->d_inode, ceph_vinop(dn->d_inode));
917 }
918 if ((!prehash || *prehash) && d_unhashed(dn))
919 d_rehash(dn);
920 if (set_offset)
921 ceph_set_dentry_offset(dn);
922out:
923 return dn;
924}
925
926/*
927 * Incorporate results into the local cache. This is either just
928 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
929 * after a lookup).
930 *
931 * A reply may contain
932 * a directory inode along with a dentry.
933 * and/or a target inode
934 *
935 * Called with snap_rwsem (read).
936 */
937int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
938 struct ceph_mds_session *session)
939{
940 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
941 struct inode *in = NULL;
942 struct ceph_mds_reply_inode *ininfo;
943 struct ceph_vino vino;
944 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
945 int i = 0;
946 int err = 0;
947
948 dout("fill_trace %p is_dentry %d is_target %d\n", req,
949 rinfo->head->is_dentry, rinfo->head->is_target);
950
951#if 0
952 /*
953 * Debugging hook:
954 *
955 * If we resend completed ops to a recovering mds, we get no
956 * trace. Since that is very rare, pretend this is the case
957 * to ensure the 'no trace' handlers in the callers behave.
958 *
959 * Fill in inodes unconditionally to avoid breaking cap
960 * invariants.
961 */
962 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
963 pr_info("fill_trace faking empty trace on %lld %s\n",
964 req->r_tid, ceph_mds_op_name(rinfo->head->op));
965 if (rinfo->head->is_dentry) {
966 rinfo->head->is_dentry = 0;
967 err = fill_inode(req->r_locked_dir,
968 &rinfo->diri, rinfo->dirfrag,
969 session, req->r_request_started, -1);
970 }
971 if (rinfo->head->is_target) {
972 rinfo->head->is_target = 0;
973 ininfo = rinfo->targeti.in;
974 vino.ino = le64_to_cpu(ininfo->ino);
975 vino.snap = le64_to_cpu(ininfo->snapid);
976 in = ceph_get_inode(sb, vino);
977 err = fill_inode(in, &rinfo->targeti, NULL,
978 session, req->r_request_started,
979 req->r_fmode);
980 iput(in);
981 }
982 }
983#endif
984
985 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
986 dout("fill_trace reply is empty!\n");
987 if (rinfo->head->result == 0 && req->r_locked_dir)
988 ceph_invalidate_dir_request(req);
989 return 0;
990 }
991
992 if (rinfo->head->is_dentry) {
993 struct inode *dir = req->r_locked_dir;
994
995 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
996 session, req->r_request_started, -1,
997 &req->r_caps_reservation);
998 if (err < 0)
999 return err;
1000 }
1001
1002 /*
1003 * ignore null lease/binding on snapdir ENOENT, or else we
1004 * will have trouble splicing in the virtual snapdir later
1005 */
1006 if (rinfo->head->is_dentry && !req->r_aborted &&
1007 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1008 fsc->mount_options->snapdir_name,
1009 req->r_dentry->d_name.len))) {
1010 /*
1011 * lookup link rename : null -> possibly existing inode
1012 * mknod symlink mkdir : null -> new inode
1013 * unlink : linked -> null
1014 */
1015 struct inode *dir = req->r_locked_dir;
1016 struct dentry *dn = req->r_dentry;
1017 bool have_dir_cap, have_lease;
1018
1019 BUG_ON(!dn);
1020 BUG_ON(!dir);
1021 BUG_ON(dn->d_parent->d_inode != dir);
1022 BUG_ON(ceph_ino(dir) !=
1023 le64_to_cpu(rinfo->diri.in->ino));
1024 BUG_ON(ceph_snap(dir) !=
1025 le64_to_cpu(rinfo->diri.in->snapid));
1026
1027 /* do we have a lease on the whole dir? */
1028 have_dir_cap =
1029 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1030 CEPH_CAP_FILE_SHARED);
1031
1032 /* do we have a dn lease? */
1033 have_lease = have_dir_cap ||
1034 le32_to_cpu(rinfo->dlease->duration_ms);
1035 if (!have_lease)
1036 dout("fill_trace no dentry lease or dir cap\n");
1037
1038 /* rename? */
1039 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1040 dout(" src %p '%.*s' dst %p '%.*s'\n",
1041 req->r_old_dentry,
1042 req->r_old_dentry->d_name.len,
1043 req->r_old_dentry->d_name.name,
1044 dn, dn->d_name.len, dn->d_name.name);
1045 dout("fill_trace doing d_move %p -> %p\n",
1046 req->r_old_dentry, dn);
1047
1048 d_move(req->r_old_dentry, dn);
1049 dout(" src %p '%.*s' dst %p '%.*s'\n",
1050 req->r_old_dentry,
1051 req->r_old_dentry->d_name.len,
1052 req->r_old_dentry->d_name.name,
1053 dn, dn->d_name.len, dn->d_name.name);
1054
1055 /* ensure target dentry is invalidated, despite
1056 rehashing bug in vfs_rename_dir */
1057 ceph_invalidate_dentry_lease(dn);
1058
1059 /*
1060 * d_move() puts the renamed dentry at the end of
1061 * d_subdirs. We need to assign it an appropriate
1062 * directory offset so we can behave when holding
1063 * D_COMPLETE.
1064 */
1065 ceph_set_dentry_offset(req->r_old_dentry);
1066 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1067 ceph_dentry(req->r_old_dentry)->offset);
1068
1069 dn = req->r_old_dentry; /* use old_dentry */
1070 in = dn->d_inode;
1071 }
1072
1073 /* null dentry? */
1074 if (!rinfo->head->is_target) {
1075 dout("fill_trace null dentry\n");
1076 if (dn->d_inode) {
1077 dout("d_delete %p\n", dn);
1078 d_delete(dn);
1079 } else {
1080 dout("d_instantiate %p NULL\n", dn);
1081 d_instantiate(dn, NULL);
1082 if (have_lease && d_unhashed(dn))
1083 d_rehash(dn);
1084 update_dentry_lease(dn, rinfo->dlease,
1085 session,
1086 req->r_request_started);
1087 }
1088 goto done;
1089 }
1090
1091 /* attach proper inode */
1092 ininfo = rinfo->targeti.in;
1093 vino.ino = le64_to_cpu(ininfo->ino);
1094 vino.snap = le64_to_cpu(ininfo->snapid);
1095 in = dn->d_inode;
1096 if (!in) {
1097 in = ceph_get_inode(sb, vino);
1098 if (IS_ERR(in)) {
1099 pr_err("fill_trace bad get_inode "
1100 "%llx.%llx\n", vino.ino, vino.snap);
1101 err = PTR_ERR(in);
1102 d_delete(dn);
1103 goto done;
1104 }
1105 dn = splice_dentry(dn, in, &have_lease, true);
1106 if (IS_ERR(dn)) {
1107 err = PTR_ERR(dn);
1108 goto done;
1109 }
1110 req->r_dentry = dn; /* may have spliced */
1111 ihold(in);
1112 } else if (ceph_ino(in) == vino.ino &&
1113 ceph_snap(in) == vino.snap) {
1114 ihold(in);
1115 } else {
1116 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1117 dn, in, ceph_ino(in), ceph_snap(in),
1118 vino.ino, vino.snap);
1119 have_lease = false;
1120 in = NULL;
1121 }
1122
1123 if (have_lease)
1124 update_dentry_lease(dn, rinfo->dlease, session,
1125 req->r_request_started);
1126 dout(" final dn %p\n", dn);
1127 i++;
1128 } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1129 req->r_op == CEPH_MDS_OP_MKSNAP) {
1130 struct dentry *dn = req->r_dentry;
1131
1132 /* fill out a snapdir LOOKUPSNAP dentry */
1133 BUG_ON(!dn);
1134 BUG_ON(!req->r_locked_dir);
1135 BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR);
1136 ininfo = rinfo->targeti.in;
1137 vino.ino = le64_to_cpu(ininfo->ino);
1138 vino.snap = le64_to_cpu(ininfo->snapid);
1139 in = ceph_get_inode(sb, vino);
1140 if (IS_ERR(in)) {
1141 pr_err("fill_inode get_inode badness %llx.%llx\n",
1142 vino.ino, vino.snap);
1143 err = PTR_ERR(in);
1144 d_delete(dn);
1145 goto done;
1146 }
1147 dout(" linking snapped dir %p to dn %p\n", in, dn);
1148 dn = splice_dentry(dn, in, NULL, true);
1149 if (IS_ERR(dn)) {
1150 err = PTR_ERR(dn);
1151 goto done;
1152 }
1153 req->r_dentry = dn; /* may have spliced */
1154 ihold(in);
1155 rinfo->head->is_dentry = 1; /* fool notrace handlers */
1156 }
1157
1158 if (rinfo->head->is_target) {
1159 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1160 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1161
1162 if (in == NULL || ceph_ino(in) != vino.ino ||
1163 ceph_snap(in) != vino.snap) {
1164 in = ceph_get_inode(sb, vino);
1165 if (IS_ERR(in)) {
1166 err = PTR_ERR(in);
1167 goto done;
1168 }
1169 }
1170 req->r_target_inode = in;
1171
1172 err = fill_inode(in,
1173 &rinfo->targeti, NULL,
1174 session, req->r_request_started,
1175 (le32_to_cpu(rinfo->head->result) == 0) ?
1176 req->r_fmode : -1,
1177 &req->r_caps_reservation);
1178 if (err < 0) {
1179 pr_err("fill_inode badness %p %llx.%llx\n",
1180 in, ceph_vinop(in));
1181 goto done;
1182 }
1183 }
1184
1185done:
1186 dout("fill_trace done err=%d\n", err);
1187 return err;
1188}
1189
1190/*
1191 * Prepopulate our cache with readdir results, leases, etc.
1192 */
1193int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1194 struct ceph_mds_session *session)
1195{
1196 struct dentry *parent = req->r_dentry;
1197 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1198 struct qstr dname;
1199 struct dentry *dn;
1200 struct inode *in;
1201 int err = 0, i;
1202 struct inode *snapdir = NULL;
1203 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1204 u64 frag = le32_to_cpu(rhead->args.readdir.frag);
1205 struct ceph_dentry_info *di;
1206
1207 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1208 snapdir = ceph_get_snapdir(parent->d_inode);
1209 parent = d_find_alias(snapdir);
1210 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1211 rinfo->dir_nr, parent);
1212 } else {
1213 dout("readdir_prepopulate %d items under dn %p\n",
1214 rinfo->dir_nr, parent);
1215 if (rinfo->dir_dir)
1216 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir);
1217 }
1218
1219 for (i = 0; i < rinfo->dir_nr; i++) {
1220 struct ceph_vino vino;
1221
1222 dname.name = rinfo->dir_dname[i];
1223 dname.len = rinfo->dir_dname_len[i];
1224 dname.hash = full_name_hash(dname.name, dname.len);
1225
1226 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1227 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1228
1229retry_lookup:
1230 dn = d_lookup(parent, &dname);
1231 dout("d_lookup on parent=%p name=%.*s got %p\n",
1232 parent, dname.len, dname.name, dn);
1233
1234 if (!dn) {
1235 dn = d_alloc(parent, &dname);
1236 dout("d_alloc %p '%.*s' = %p\n", parent,
1237 dname.len, dname.name, dn);
1238 if (dn == NULL) {
1239 dout("d_alloc badness\n");
1240 err = -ENOMEM;
1241 goto out;
1242 }
1243 err = ceph_init_dentry(dn);
1244 if (err < 0) {
1245 dput(dn);
1246 goto out;
1247 }
1248 } else if (dn->d_inode &&
1249 (ceph_ino(dn->d_inode) != vino.ino ||
1250 ceph_snap(dn->d_inode) != vino.snap)) {
1251 dout(" dn %p points to wrong inode %p\n",
1252 dn, dn->d_inode);
1253 d_delete(dn);
1254 dput(dn);
1255 goto retry_lookup;
1256 } else {
1257 /* reorder parent's d_subdirs */
1258 spin_lock(&parent->d_lock);
1259 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
1260 list_move(&dn->d_u.d_child, &parent->d_subdirs);
1261 spin_unlock(&dn->d_lock);
1262 spin_unlock(&parent->d_lock);
1263 }
1264
1265 di = dn->d_fsdata;
1266 di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset);
1267
1268 /* inode */
1269 if (dn->d_inode) {
1270 in = dn->d_inode;
1271 } else {
1272 in = ceph_get_inode(parent->d_sb, vino);
1273 if (IS_ERR(in)) {
1274 dout("new_inode badness\n");
1275 d_delete(dn);
1276 dput(dn);
1277 err = PTR_ERR(in);
1278 goto out;
1279 }
1280 dn = splice_dentry(dn, in, NULL, false);
1281 if (IS_ERR(dn))
1282 dn = NULL;
1283 }
1284
1285 if (fill_inode(in, &rinfo->dir_in[i], NULL, session,
1286 req->r_request_started, -1,
1287 &req->r_caps_reservation) < 0) {
1288 pr_err("fill_inode badness on %p\n", in);
1289 goto next_item;
1290 }
1291 if (dn)
1292 update_dentry_lease(dn, rinfo->dir_dlease[i],
1293 req->r_session,
1294 req->r_request_started);
1295next_item:
1296 if (dn)
1297 dput(dn);
1298 }
1299 req->r_did_prepopulate = true;
1300
1301out:
1302 if (snapdir) {
1303 iput(snapdir);
1304 dput(parent);
1305 }
1306 dout("readdir_prepopulate done\n");
1307 return err;
1308}
1309
1310int ceph_inode_set_size(struct inode *inode, loff_t size)
1311{
1312 struct ceph_inode_info *ci = ceph_inode(inode);
1313 int ret = 0;
1314
1315 spin_lock(&ci->i_ceph_lock);
1316 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1317 inode->i_size = size;
1318 inode->i_blocks = (size + (1 << 9) - 1) >> 9;
1319
1320 /* tell the MDS if we are approaching max_size */
1321 if ((size << 1) >= ci->i_max_size &&
1322 (ci->i_reported_size << 1) < ci->i_max_size)
1323 ret = 1;
1324
1325 spin_unlock(&ci->i_ceph_lock);
1326 return ret;
1327}
1328
1329/*
1330 * Write back inode data in a worker thread. (This can't be done
1331 * in the message handler context.)
1332 */
1333void ceph_queue_writeback(struct inode *inode)
1334{
1335 ihold(inode);
1336 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1337 &ceph_inode(inode)->i_wb_work)) {
1338 dout("ceph_queue_writeback %p\n", inode);
1339 } else {
1340 dout("ceph_queue_writeback %p failed\n", inode);
1341 iput(inode);
1342 }
1343}
1344
1345static void ceph_writeback_work(struct work_struct *work)
1346{
1347 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1348 i_wb_work);
1349 struct inode *inode = &ci->vfs_inode;
1350
1351 dout("writeback %p\n", inode);
1352 filemap_fdatawrite(&inode->i_data);
1353 iput(inode);
1354}
1355
1356/*
1357 * queue an async invalidation
1358 */
1359void ceph_queue_invalidate(struct inode *inode)
1360{
1361 ihold(inode);
1362 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1363 &ceph_inode(inode)->i_pg_inv_work)) {
1364 dout("ceph_queue_invalidate %p\n", inode);
1365 } else {
1366 dout("ceph_queue_invalidate %p failed\n", inode);
1367 iput(inode);
1368 }
1369}
1370
1371/*
1372 * Invalidate inode pages in a worker thread. (This can't be done
1373 * in the message handler context.)
1374 */
1375static void ceph_invalidate_work(struct work_struct *work)
1376{
1377 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1378 i_pg_inv_work);
1379 struct inode *inode = &ci->vfs_inode;
1380 u32 orig_gen;
1381 int check = 0;
1382
1383 spin_lock(&ci->i_ceph_lock);
1384 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1385 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1386 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1387 /* nevermind! */
1388 spin_unlock(&ci->i_ceph_lock);
1389 goto out;
1390 }
1391 orig_gen = ci->i_rdcache_gen;
1392 spin_unlock(&ci->i_ceph_lock);
1393
1394 truncate_inode_pages(&inode->i_data, 0);
1395
1396 spin_lock(&ci->i_ceph_lock);
1397 if (orig_gen == ci->i_rdcache_gen &&
1398 orig_gen == ci->i_rdcache_revoking) {
1399 dout("invalidate_pages %p gen %d successful\n", inode,
1400 ci->i_rdcache_gen);
1401 ci->i_rdcache_revoking--;
1402 check = 1;
1403 } else {
1404 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1405 inode, orig_gen, ci->i_rdcache_gen,
1406 ci->i_rdcache_revoking);
1407 }
1408 spin_unlock(&ci->i_ceph_lock);
1409
1410 if (check)
1411 ceph_check_caps(ci, 0, NULL);
1412out:
1413 iput(inode);
1414}
1415
1416
1417/*
1418 * called by trunc_wq; take i_mutex ourselves
1419 *
1420 * We also truncate in a separate thread as well.
1421 */
1422static void ceph_vmtruncate_work(struct work_struct *work)
1423{
1424 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1425 i_vmtruncate_work);
1426 struct inode *inode = &ci->vfs_inode;
1427
1428 dout("vmtruncate_work %p\n", inode);
1429 mutex_lock(&inode->i_mutex);
1430 __ceph_do_pending_vmtruncate(inode);
1431 mutex_unlock(&inode->i_mutex);
1432 iput(inode);
1433}
1434
1435/*
1436 * Queue an async vmtruncate. If we fail to queue work, we will handle
1437 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1438 */
1439void ceph_queue_vmtruncate(struct inode *inode)
1440{
1441 struct ceph_inode_info *ci = ceph_inode(inode);
1442
1443 ihold(inode);
1444 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
1445 &ci->i_vmtruncate_work)) {
1446 dout("ceph_queue_vmtruncate %p\n", inode);
1447 } else {
1448 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1449 inode, ci->i_truncate_pending);
1450 iput(inode);
1451 }
1452}
1453
1454/*
1455 * called with i_mutex held.
1456 *
1457 * Make sure any pending truncation is applied before doing anything
1458 * that may depend on it.
1459 */
1460void __ceph_do_pending_vmtruncate(struct inode *inode)
1461{
1462 struct ceph_inode_info *ci = ceph_inode(inode);
1463 u64 to;
1464 int wrbuffer_refs, wake = 0;
1465
1466retry:
1467 spin_lock(&ci->i_ceph_lock);
1468 if (ci->i_truncate_pending == 0) {
1469 dout("__do_pending_vmtruncate %p none pending\n", inode);
1470 spin_unlock(&ci->i_ceph_lock);
1471 return;
1472 }
1473
1474 /*
1475 * make sure any dirty snapped pages are flushed before we
1476 * possibly truncate them.. so write AND block!
1477 */
1478 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1479 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1480 inode);
1481 spin_unlock(&ci->i_ceph_lock);
1482 filemap_write_and_wait_range(&inode->i_data, 0,
1483 inode->i_sb->s_maxbytes);
1484 goto retry;
1485 }
1486
1487 to = ci->i_truncate_size;
1488 wrbuffer_refs = ci->i_wrbuffer_ref;
1489 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1490 ci->i_truncate_pending, to);
1491 spin_unlock(&ci->i_ceph_lock);
1492
1493 truncate_inode_pages(inode->i_mapping, to);
1494
1495 spin_lock(&ci->i_ceph_lock);
1496 ci->i_truncate_pending--;
1497 if (ci->i_truncate_pending == 0)
1498 wake = 1;
1499 spin_unlock(&ci->i_ceph_lock);
1500
1501 if (wrbuffer_refs == 0)
1502 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1503 if (wake)
1504 wake_up_all(&ci->i_cap_wq);
1505}
1506
1507
1508/*
1509 * symlinks
1510 */
1511static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
1512{
1513 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode);
1514 nd_set_link(nd, ci->i_symlink);
1515 return NULL;
1516}
1517
1518static const struct inode_operations ceph_symlink_iops = {
1519 .readlink = generic_readlink,
1520 .follow_link = ceph_sym_follow_link,
1521};
1522
1523/*
1524 * setattr
1525 */
1526int ceph_setattr(struct dentry *dentry, struct iattr *attr)
1527{
1528 struct inode *inode = dentry->d_inode;
1529 struct ceph_inode_info *ci = ceph_inode(inode);
1530 struct inode *parent_inode;
1531 const unsigned int ia_valid = attr->ia_valid;
1532 struct ceph_mds_request *req;
1533 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
1534 int issued;
1535 int release = 0, dirtied = 0;
1536 int mask = 0;
1537 int err = 0;
1538 int inode_dirty_flags = 0;
1539
1540 if (ceph_snap(inode) != CEPH_NOSNAP)
1541 return -EROFS;
1542
1543 __ceph_do_pending_vmtruncate(inode);
1544
1545 err = inode_change_ok(inode, attr);
1546 if (err != 0)
1547 return err;
1548
1549 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1550 USE_AUTH_MDS);
1551 if (IS_ERR(req))
1552 return PTR_ERR(req);
1553
1554 spin_lock(&ci->i_ceph_lock);
1555 issued = __ceph_caps_issued(ci, NULL);
1556 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1557
1558 if (ia_valid & ATTR_UID) {
1559 dout("setattr %p uid %d -> %d\n", inode,
1560 inode->i_uid, attr->ia_uid);
1561 if (issued & CEPH_CAP_AUTH_EXCL) {
1562 inode->i_uid = attr->ia_uid;
1563 dirtied |= CEPH_CAP_AUTH_EXCL;
1564 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1565 attr->ia_uid != inode->i_uid) {
1566 req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid);
1567 mask |= CEPH_SETATTR_UID;
1568 release |= CEPH_CAP_AUTH_SHARED;
1569 }
1570 }
1571 if (ia_valid & ATTR_GID) {
1572 dout("setattr %p gid %d -> %d\n", inode,
1573 inode->i_gid, attr->ia_gid);
1574 if (issued & CEPH_CAP_AUTH_EXCL) {
1575 inode->i_gid = attr->ia_gid;
1576 dirtied |= CEPH_CAP_AUTH_EXCL;
1577 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1578 attr->ia_gid != inode->i_gid) {
1579 req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid);
1580 mask |= CEPH_SETATTR_GID;
1581 release |= CEPH_CAP_AUTH_SHARED;
1582 }
1583 }
1584 if (ia_valid & ATTR_MODE) {
1585 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1586 attr->ia_mode);
1587 if (issued & CEPH_CAP_AUTH_EXCL) {
1588 inode->i_mode = attr->ia_mode;
1589 dirtied |= CEPH_CAP_AUTH_EXCL;
1590 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1591 attr->ia_mode != inode->i_mode) {
1592 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1593 mask |= CEPH_SETATTR_MODE;
1594 release |= CEPH_CAP_AUTH_SHARED;
1595 }
1596 }
1597
1598 if (ia_valid & ATTR_ATIME) {
1599 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1600 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1601 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1602 if (issued & CEPH_CAP_FILE_EXCL) {
1603 ci->i_time_warp_seq++;
1604 inode->i_atime = attr->ia_atime;
1605 dirtied |= CEPH_CAP_FILE_EXCL;
1606 } else if ((issued & CEPH_CAP_FILE_WR) &&
1607 timespec_compare(&inode->i_atime,
1608 &attr->ia_atime) < 0) {
1609 inode->i_atime = attr->ia_atime;
1610 dirtied |= CEPH_CAP_FILE_WR;
1611 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1612 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
1613 ceph_encode_timespec(&req->r_args.setattr.atime,
1614 &attr->ia_atime);
1615 mask |= CEPH_SETATTR_ATIME;
1616 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
1617 CEPH_CAP_FILE_WR;
1618 }
1619 }
1620 if (ia_valid & ATTR_MTIME) {
1621 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
1622 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
1623 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
1624 if (issued & CEPH_CAP_FILE_EXCL) {
1625 ci->i_time_warp_seq++;
1626 inode->i_mtime = attr->ia_mtime;
1627 dirtied |= CEPH_CAP_FILE_EXCL;
1628 } else if ((issued & CEPH_CAP_FILE_WR) &&
1629 timespec_compare(&inode->i_mtime,
1630 &attr->ia_mtime) < 0) {
1631 inode->i_mtime = attr->ia_mtime;
1632 dirtied |= CEPH_CAP_FILE_WR;
1633 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1634 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
1635 ceph_encode_timespec(&req->r_args.setattr.mtime,
1636 &attr->ia_mtime);
1637 mask |= CEPH_SETATTR_MTIME;
1638 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1639 CEPH_CAP_FILE_WR;
1640 }
1641 }
1642 if (ia_valid & ATTR_SIZE) {
1643 dout("setattr %p size %lld -> %lld\n", inode,
1644 inode->i_size, attr->ia_size);
1645 if (attr->ia_size > inode->i_sb->s_maxbytes) {
1646 err = -EINVAL;
1647 goto out;
1648 }
1649 if ((issued & CEPH_CAP_FILE_EXCL) &&
1650 attr->ia_size > inode->i_size) {
1651 inode->i_size = attr->ia_size;
1652 inode->i_blocks =
1653 (attr->ia_size + (1 << 9) - 1) >> 9;
1654 inode->i_ctime = attr->ia_ctime;
1655 ci->i_reported_size = attr->ia_size;
1656 dirtied |= CEPH_CAP_FILE_EXCL;
1657 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1658 attr->ia_size != inode->i_size) {
1659 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
1660 req->r_args.setattr.old_size =
1661 cpu_to_le64(inode->i_size);
1662 mask |= CEPH_SETATTR_SIZE;
1663 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1664 CEPH_CAP_FILE_WR;
1665 }
1666 }
1667
1668 /* these do nothing */
1669 if (ia_valid & ATTR_CTIME) {
1670 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
1671 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
1672 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
1673 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
1674 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
1675 only ? "ctime only" : "ignored");
1676 inode->i_ctime = attr->ia_ctime;
1677 if (only) {
1678 /*
1679 * if kernel wants to dirty ctime but nothing else,
1680 * we need to choose a cap to dirty under, or do
1681 * a almost-no-op setattr
1682 */
1683 if (issued & CEPH_CAP_AUTH_EXCL)
1684 dirtied |= CEPH_CAP_AUTH_EXCL;
1685 else if (issued & CEPH_CAP_FILE_EXCL)
1686 dirtied |= CEPH_CAP_FILE_EXCL;
1687 else if (issued & CEPH_CAP_XATTR_EXCL)
1688 dirtied |= CEPH_CAP_XATTR_EXCL;
1689 else
1690 mask |= CEPH_SETATTR_CTIME;
1691 }
1692 }
1693 if (ia_valid & ATTR_FILE)
1694 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
1695
1696 if (dirtied) {
1697 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied);
1698 inode->i_ctime = CURRENT_TIME;
1699 }
1700
1701 release &= issued;
1702 spin_unlock(&ci->i_ceph_lock);
1703
1704 if (inode_dirty_flags)
1705 __mark_inode_dirty(inode, inode_dirty_flags);
1706
1707 if (mask) {
1708 req->r_inode = inode;
1709 ihold(inode);
1710 req->r_inode_drop = release;
1711 req->r_args.setattr.mask = cpu_to_le32(mask);
1712 req->r_num_caps = 1;
1713 parent_inode = ceph_get_dentry_parent_inode(dentry);
1714 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
1715 iput(parent_inode);
1716 }
1717 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
1718 ceph_cap_string(dirtied), mask);
1719
1720 ceph_mdsc_put_request(req);
1721 __ceph_do_pending_vmtruncate(inode);
1722 return err;
1723out:
1724 spin_unlock(&ci->i_ceph_lock);
1725 ceph_mdsc_put_request(req);
1726 return err;
1727}
1728
1729/*
1730 * Verify that we have a lease on the given mask. If not,
1731 * do a getattr against an mds.
1732 */
1733int ceph_do_getattr(struct inode *inode, int mask)
1734{
1735 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
1736 struct ceph_mds_client *mdsc = fsc->mdsc;
1737 struct ceph_mds_request *req;
1738 int err;
1739
1740 if (ceph_snap(inode) == CEPH_SNAPDIR) {
1741 dout("do_getattr inode %p SNAPDIR\n", inode);
1742 return 0;
1743 }
1744
1745 dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode);
1746 if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
1747 return 0;
1748
1749 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
1750 if (IS_ERR(req))
1751 return PTR_ERR(req);
1752 req->r_inode = inode;
1753 ihold(inode);
1754 req->r_num_caps = 1;
1755 req->r_args.getattr.mask = cpu_to_le32(mask);
1756 err = ceph_mdsc_do_request(mdsc, NULL, req);
1757 ceph_mdsc_put_request(req);
1758 dout("do_getattr result=%d\n", err);
1759 return err;
1760}
1761
1762
1763/*
1764 * Check inode permissions. We verify we have a valid value for
1765 * the AUTH cap, then call the generic handler.
1766 */
1767int ceph_permission(struct inode *inode, int mask)
1768{
1769 int err;
1770
1771 if (mask & MAY_NOT_BLOCK)
1772 return -ECHILD;
1773
1774 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
1775
1776 if (!err)
1777 err = generic_permission(inode, mask);
1778 return err;
1779}
1780
1781/*
1782 * Get all attributes. Hopefully somedata we'll have a statlite()
1783 * and can limit the fields we require to be accurate.
1784 */
1785int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
1786 struct kstat *stat)
1787{
1788 struct inode *inode = dentry->d_inode;
1789 struct ceph_inode_info *ci = ceph_inode(inode);
1790 int err;
1791
1792 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
1793 if (!err) {
1794 generic_fillattr(inode, stat);
1795 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
1796 if (ceph_snap(inode) != CEPH_NOSNAP)
1797 stat->dev = ceph_snap(inode);
1798 else
1799 stat->dev = 0;
1800 if (S_ISDIR(inode->i_mode)) {
1801 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
1802 RBYTES))
1803 stat->size = ci->i_rbytes;
1804 else
1805 stat->size = ci->i_files + ci->i_subdirs;
1806 stat->blocks = 0;
1807 stat->blksize = 65536;
1808 }
1809 }
1810 return err;
1811}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/ceph/ceph_debug.h>
3
4#include <linux/module.h>
5#include <linux/fs.h>
6#include <linux/slab.h>
7#include <linux/string.h>
8#include <linux/uaccess.h>
9#include <linux/kernel.h>
10#include <linux/writeback.h>
11#include <linux/vmalloc.h>
12#include <linux/xattr.h>
13#include <linux/posix_acl.h>
14#include <linux/random.h>
15#include <linux/sort.h>
16#include <linux/iversion.h>
17#include <linux/fscrypt.h>
18
19#include "super.h"
20#include "mds_client.h"
21#include "cache.h"
22#include "crypto.h"
23#include <linux/ceph/decode.h>
24
25/*
26 * Ceph inode operations
27 *
28 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
29 * setattr, etc.), xattr helpers, and helpers for assimilating
30 * metadata returned by the MDS into our cache.
31 *
32 * Also define helpers for doing asynchronous writeback, invalidation,
33 * and truncation for the benefit of those who can't afford to block
34 * (typically because they are in the message handler path).
35 */
36
37static const struct inode_operations ceph_symlink_iops;
38static const struct inode_operations ceph_encrypted_symlink_iops;
39
40static void ceph_inode_work(struct work_struct *work);
41
42/*
43 * find or create an inode, given the ceph ino number
44 */
45static int ceph_set_ino_cb(struct inode *inode, void *data)
46{
47 struct ceph_inode_info *ci = ceph_inode(inode);
48 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
49
50 ci->i_vino = *(struct ceph_vino *)data;
51 inode->i_ino = ceph_vino_to_ino_t(ci->i_vino);
52 inode_set_iversion_raw(inode, 0);
53 percpu_counter_inc(&mdsc->metric.total_inodes);
54
55 return 0;
56}
57
58/**
59 * ceph_new_inode - allocate a new inode in advance of an expected create
60 * @dir: parent directory for new inode
61 * @dentry: dentry that may eventually point to new inode
62 * @mode: mode of new inode
63 * @as_ctx: pointer to inherited security context
64 *
65 * Allocate a new inode in advance of an operation to create a new inode.
66 * This allocates the inode and sets up the acl_sec_ctx with appropriate
67 * info for the new inode.
68 *
69 * Returns a pointer to the new inode or an ERR_PTR.
70 */
71struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry,
72 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx)
73{
74 int err;
75 struct inode *inode;
76
77 inode = new_inode(dir->i_sb);
78 if (!inode)
79 return ERR_PTR(-ENOMEM);
80
81 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT;
82
83 if (!S_ISLNK(*mode)) {
84 err = ceph_pre_init_acls(dir, mode, as_ctx);
85 if (err < 0)
86 goto out_err;
87 }
88
89 inode->i_state = 0;
90 inode->i_mode = *mode;
91
92 err = ceph_security_init_secctx(dentry, *mode, as_ctx);
93 if (err < 0)
94 goto out_err;
95
96 /*
97 * We'll skip setting fscrypt context for snapshots, leaving that for
98 * the handle_reply().
99 */
100 if (ceph_snap(dir) != CEPH_SNAPDIR) {
101 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx);
102 if (err)
103 goto out_err;
104 }
105
106 return inode;
107out_err:
108 iput(inode);
109 return ERR_PTR(err);
110}
111
112void ceph_as_ctx_to_req(struct ceph_mds_request *req,
113 struct ceph_acl_sec_ctx *as_ctx)
114{
115 if (as_ctx->pagelist) {
116 req->r_pagelist = as_ctx->pagelist;
117 as_ctx->pagelist = NULL;
118 }
119 ceph_fscrypt_as_ctx_to_req(req, as_ctx);
120}
121
122/**
123 * ceph_get_inode - find or create/hash a new inode
124 * @sb: superblock to search and allocate in
125 * @vino: vino to search for
126 * @newino: optional new inode to insert if one isn't found (may be NULL)
127 *
128 * Search for or insert a new inode into the hash for the given vino, and
129 * return a reference to it. If new is non-NULL, its reference is consumed.
130 */
131struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino,
132 struct inode *newino)
133{
134 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb);
135 struct ceph_client *cl = mdsc->fsc->client;
136 struct inode *inode;
137
138 if (ceph_vino_is_reserved(vino))
139 return ERR_PTR(-EREMOTEIO);
140
141 if (newino) {
142 inode = inode_insert5(newino, (unsigned long)vino.ino,
143 ceph_ino_compare, ceph_set_ino_cb, &vino);
144 if (inode != newino)
145 iput(newino);
146 } else {
147 inode = iget5_locked(sb, (unsigned long)vino.ino,
148 ceph_ino_compare, ceph_set_ino_cb, &vino);
149 }
150
151 if (!inode) {
152 doutc(cl, "no inode found for %llx.%llx\n", vino.ino, vino.snap);
153 return ERR_PTR(-ENOMEM);
154 }
155
156 doutc(cl, "on %llx=%llx.%llx got %p new %d\n",
157 ceph_present_inode(inode), ceph_vinop(inode), inode,
158 !!(inode->i_state & I_NEW));
159 return inode;
160}
161
162/*
163 * get/constuct snapdir inode for a given directory
164 */
165struct inode *ceph_get_snapdir(struct inode *parent)
166{
167 struct ceph_client *cl = ceph_inode_to_client(parent);
168 struct ceph_vino vino = {
169 .ino = ceph_ino(parent),
170 .snap = CEPH_SNAPDIR,
171 };
172 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL);
173 struct ceph_inode_info *ci = ceph_inode(inode);
174 int ret = -ENOTDIR;
175
176 if (IS_ERR(inode))
177 return inode;
178
179 if (!S_ISDIR(parent->i_mode)) {
180 pr_warn_once_client(cl, "bad snapdir parent type (mode=0%o)\n",
181 parent->i_mode);
182 goto err;
183 }
184
185 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) {
186 pr_warn_once_client(cl, "bad snapdir inode type (mode=0%o)\n",
187 inode->i_mode);
188 goto err;
189 }
190
191 inode->i_mode = parent->i_mode;
192 inode->i_uid = parent->i_uid;
193 inode->i_gid = parent->i_gid;
194 inode_set_mtime_to_ts(inode, inode_get_mtime(parent));
195 inode_set_ctime_to_ts(inode, inode_get_ctime(parent));
196 inode_set_atime_to_ts(inode, inode_get_atime(parent));
197 ci->i_rbytes = 0;
198 ci->i_btime = ceph_inode(parent)->i_btime;
199
200#ifdef CONFIG_FS_ENCRYPTION
201 /* if encrypted, just borrow fscrypt_auth from parent */
202 if (IS_ENCRYPTED(parent)) {
203 struct ceph_inode_info *pci = ceph_inode(parent);
204
205 ci->fscrypt_auth = kmemdup(pci->fscrypt_auth,
206 pci->fscrypt_auth_len,
207 GFP_KERNEL);
208 if (ci->fscrypt_auth) {
209 inode->i_flags |= S_ENCRYPTED;
210 ci->fscrypt_auth_len = pci->fscrypt_auth_len;
211 } else {
212 doutc(cl, "Failed to alloc snapdir fscrypt_auth\n");
213 ret = -ENOMEM;
214 goto err;
215 }
216 }
217#endif
218 if (inode->i_state & I_NEW) {
219 inode->i_op = &ceph_snapdir_iops;
220 inode->i_fop = &ceph_snapdir_fops;
221 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
222 unlock_new_inode(inode);
223 }
224
225 return inode;
226err:
227 if ((inode->i_state & I_NEW))
228 discard_new_inode(inode);
229 else
230 iput(inode);
231 return ERR_PTR(ret);
232}
233
234const struct inode_operations ceph_file_iops = {
235 .permission = ceph_permission,
236 .setattr = ceph_setattr,
237 .getattr = ceph_getattr,
238 .listxattr = ceph_listxattr,
239 .get_inode_acl = ceph_get_acl,
240 .set_acl = ceph_set_acl,
241};
242
243
244/*
245 * We use a 'frag tree' to keep track of the MDS's directory fragments
246 * for a given inode (usually there is just a single fragment). We
247 * need to know when a child frag is delegated to a new MDS, or when
248 * it is flagged as replicated, so we can direct our requests
249 * accordingly.
250 */
251
252/*
253 * find/create a frag in the tree
254 */
255static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
256 u32 f)
257{
258 struct inode *inode = &ci->netfs.inode;
259 struct ceph_client *cl = ceph_inode_to_client(inode);
260 struct rb_node **p;
261 struct rb_node *parent = NULL;
262 struct ceph_inode_frag *frag;
263 int c;
264
265 p = &ci->i_fragtree.rb_node;
266 while (*p) {
267 parent = *p;
268 frag = rb_entry(parent, struct ceph_inode_frag, node);
269 c = ceph_frag_compare(f, frag->frag);
270 if (c < 0)
271 p = &(*p)->rb_left;
272 else if (c > 0)
273 p = &(*p)->rb_right;
274 else
275 return frag;
276 }
277
278 frag = kmalloc(sizeof(*frag), GFP_NOFS);
279 if (!frag)
280 return ERR_PTR(-ENOMEM);
281
282 frag->frag = f;
283 frag->split_by = 0;
284 frag->mds = -1;
285 frag->ndist = 0;
286
287 rb_link_node(&frag->node, parent, p);
288 rb_insert_color(&frag->node, &ci->i_fragtree);
289
290 doutc(cl, "added %p %llx.%llx frag %x\n", inode, ceph_vinop(inode), f);
291 return frag;
292}
293
294/*
295 * find a specific frag @f
296 */
297struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
298{
299 struct rb_node *n = ci->i_fragtree.rb_node;
300
301 while (n) {
302 struct ceph_inode_frag *frag =
303 rb_entry(n, struct ceph_inode_frag, node);
304 int c = ceph_frag_compare(f, frag->frag);
305 if (c < 0)
306 n = n->rb_left;
307 else if (c > 0)
308 n = n->rb_right;
309 else
310 return frag;
311 }
312 return NULL;
313}
314
315/*
316 * Choose frag containing the given value @v. If @pfrag is
317 * specified, copy the frag delegation info to the caller if
318 * it is present.
319 */
320static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
321 struct ceph_inode_frag *pfrag, int *found)
322{
323 struct ceph_client *cl = ceph_inode_to_client(&ci->netfs.inode);
324 u32 t = ceph_frag_make(0, 0);
325 struct ceph_inode_frag *frag;
326 unsigned nway, i;
327 u32 n;
328
329 if (found)
330 *found = 0;
331
332 while (1) {
333 WARN_ON(!ceph_frag_contains_value(t, v));
334 frag = __ceph_find_frag(ci, t);
335 if (!frag)
336 break; /* t is a leaf */
337 if (frag->split_by == 0) {
338 if (pfrag)
339 memcpy(pfrag, frag, sizeof(*pfrag));
340 if (found)
341 *found = 1;
342 break;
343 }
344
345 /* choose child */
346 nway = 1 << frag->split_by;
347 doutc(cl, "frag(%x) %x splits by %d (%d ways)\n", v, t,
348 frag->split_by, nway);
349 for (i = 0; i < nway; i++) {
350 n = ceph_frag_make_child(t, frag->split_by, i);
351 if (ceph_frag_contains_value(n, v)) {
352 t = n;
353 break;
354 }
355 }
356 BUG_ON(i == nway);
357 }
358 doutc(cl, "frag(%x) = %x\n", v, t);
359
360 return t;
361}
362
363u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
364 struct ceph_inode_frag *pfrag, int *found)
365{
366 u32 ret;
367 mutex_lock(&ci->i_fragtree_mutex);
368 ret = __ceph_choose_frag(ci, v, pfrag, found);
369 mutex_unlock(&ci->i_fragtree_mutex);
370 return ret;
371}
372
373/*
374 * Process dirfrag (delegation) info from the mds. Include leaf
375 * fragment in tree ONLY if ndist > 0. Otherwise, only
376 * branches/splits are included in i_fragtree)
377 */
378static int ceph_fill_dirfrag(struct inode *inode,
379 struct ceph_mds_reply_dirfrag *dirinfo)
380{
381 struct ceph_inode_info *ci = ceph_inode(inode);
382 struct ceph_client *cl = ceph_inode_to_client(inode);
383 struct ceph_inode_frag *frag;
384 u32 id = le32_to_cpu(dirinfo->frag);
385 int mds = le32_to_cpu(dirinfo->auth);
386 int ndist = le32_to_cpu(dirinfo->ndist);
387 int diri_auth = -1;
388 int i;
389 int err = 0;
390
391 spin_lock(&ci->i_ceph_lock);
392 if (ci->i_auth_cap)
393 diri_auth = ci->i_auth_cap->mds;
394 spin_unlock(&ci->i_ceph_lock);
395
396 if (mds == -1) /* CDIR_AUTH_PARENT */
397 mds = diri_auth;
398
399 mutex_lock(&ci->i_fragtree_mutex);
400 if (ndist == 0 && mds == diri_auth) {
401 /* no delegation info needed. */
402 frag = __ceph_find_frag(ci, id);
403 if (!frag)
404 goto out;
405 if (frag->split_by == 0) {
406 /* tree leaf, remove */
407 doutc(cl, "removed %p %llx.%llx frag %x (no ref)\n",
408 inode, ceph_vinop(inode), id);
409 rb_erase(&frag->node, &ci->i_fragtree);
410 kfree(frag);
411 } else {
412 /* tree branch, keep and clear */
413 doutc(cl, "cleared %p %llx.%llx frag %x referral\n",
414 inode, ceph_vinop(inode), id);
415 frag->mds = -1;
416 frag->ndist = 0;
417 }
418 goto out;
419 }
420
421
422 /* find/add this frag to store mds delegation info */
423 frag = __get_or_create_frag(ci, id);
424 if (IS_ERR(frag)) {
425 /* this is not the end of the world; we can continue
426 with bad/inaccurate delegation info */
427 pr_err_client(cl, "ENOMEM on mds ref %p %llx.%llx fg %x\n",
428 inode, ceph_vinop(inode),
429 le32_to_cpu(dirinfo->frag));
430 err = -ENOMEM;
431 goto out;
432 }
433
434 frag->mds = mds;
435 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
436 for (i = 0; i < frag->ndist; i++)
437 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
438 doutc(cl, "%p %llx.%llx frag %x ndist=%d\n", inode,
439 ceph_vinop(inode), frag->frag, frag->ndist);
440
441out:
442 mutex_unlock(&ci->i_fragtree_mutex);
443 return err;
444}
445
446static int frag_tree_split_cmp(const void *l, const void *r)
447{
448 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
449 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
450 return ceph_frag_compare(le32_to_cpu(ls->frag),
451 le32_to_cpu(rs->frag));
452}
453
454static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
455{
456 if (!frag)
457 return f == ceph_frag_make(0, 0);
458 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
459 return false;
460 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
461}
462
463static int ceph_fill_fragtree(struct inode *inode,
464 struct ceph_frag_tree_head *fragtree,
465 struct ceph_mds_reply_dirfrag *dirinfo)
466{
467 struct ceph_client *cl = ceph_inode_to_client(inode);
468 struct ceph_inode_info *ci = ceph_inode(inode);
469 struct ceph_inode_frag *frag, *prev_frag = NULL;
470 struct rb_node *rb_node;
471 unsigned i, split_by, nsplits;
472 u32 id;
473 bool update = false;
474
475 mutex_lock(&ci->i_fragtree_mutex);
476 nsplits = le32_to_cpu(fragtree->nsplits);
477 if (nsplits != ci->i_fragtree_nsplits) {
478 update = true;
479 } else if (nsplits) {
480 i = get_random_u32_below(nsplits);
481 id = le32_to_cpu(fragtree->splits[i].frag);
482 if (!__ceph_find_frag(ci, id))
483 update = true;
484 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
485 rb_node = rb_first(&ci->i_fragtree);
486 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
487 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
488 update = true;
489 }
490 if (!update && dirinfo) {
491 id = le32_to_cpu(dirinfo->frag);
492 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
493 update = true;
494 }
495 if (!update)
496 goto out_unlock;
497
498 if (nsplits > 1) {
499 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
500 frag_tree_split_cmp, NULL);
501 }
502
503 doutc(cl, "%p %llx.%llx\n", inode, ceph_vinop(inode));
504 rb_node = rb_first(&ci->i_fragtree);
505 for (i = 0; i < nsplits; i++) {
506 id = le32_to_cpu(fragtree->splits[i].frag);
507 split_by = le32_to_cpu(fragtree->splits[i].by);
508 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
509 pr_err_client(cl, "%p %llx.%llx invalid split %d/%u, "
510 "frag %x split by %d\n", inode,
511 ceph_vinop(inode), i, nsplits, id, split_by);
512 continue;
513 }
514 frag = NULL;
515 while (rb_node) {
516 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
517 if (ceph_frag_compare(frag->frag, id) >= 0) {
518 if (frag->frag != id)
519 frag = NULL;
520 else
521 rb_node = rb_next(rb_node);
522 break;
523 }
524 rb_node = rb_next(rb_node);
525 /* delete stale split/leaf node */
526 if (frag->split_by > 0 ||
527 !is_frag_child(frag->frag, prev_frag)) {
528 rb_erase(&frag->node, &ci->i_fragtree);
529 if (frag->split_by > 0)
530 ci->i_fragtree_nsplits--;
531 kfree(frag);
532 }
533 frag = NULL;
534 }
535 if (!frag) {
536 frag = __get_or_create_frag(ci, id);
537 if (IS_ERR(frag))
538 continue;
539 }
540 if (frag->split_by == 0)
541 ci->i_fragtree_nsplits++;
542 frag->split_by = split_by;
543 doutc(cl, " frag %x split by %d\n", frag->frag, frag->split_by);
544 prev_frag = frag;
545 }
546 while (rb_node) {
547 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
548 rb_node = rb_next(rb_node);
549 /* delete stale split/leaf node */
550 if (frag->split_by > 0 ||
551 !is_frag_child(frag->frag, prev_frag)) {
552 rb_erase(&frag->node, &ci->i_fragtree);
553 if (frag->split_by > 0)
554 ci->i_fragtree_nsplits--;
555 kfree(frag);
556 }
557 }
558out_unlock:
559 mutex_unlock(&ci->i_fragtree_mutex);
560 return 0;
561}
562
563/*
564 * initialize a newly allocated inode.
565 */
566struct inode *ceph_alloc_inode(struct super_block *sb)
567{
568 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
569 struct ceph_inode_info *ci;
570 int i;
571
572 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS);
573 if (!ci)
574 return NULL;
575
576 doutc(fsc->client, "%p\n", &ci->netfs.inode);
577
578 /* Set parameters for the netfs library */
579 netfs_inode_init(&ci->netfs, &ceph_netfs_ops, false);
580
581 spin_lock_init(&ci->i_ceph_lock);
582
583 ci->i_version = 0;
584 ci->i_inline_version = 0;
585 ci->i_time_warp_seq = 0;
586 ci->i_ceph_flags = 0;
587 atomic64_set(&ci->i_ordered_count, 1);
588 atomic64_set(&ci->i_release_count, 1);
589 atomic64_set(&ci->i_complete_seq[0], 0);
590 atomic64_set(&ci->i_complete_seq[1], 0);
591 ci->i_symlink = NULL;
592
593 ci->i_max_bytes = 0;
594 ci->i_max_files = 0;
595
596 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
597 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout));
598 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
599
600 ci->i_fragtree = RB_ROOT;
601 mutex_init(&ci->i_fragtree_mutex);
602
603 ci->i_xattrs.blob = NULL;
604 ci->i_xattrs.prealloc_blob = NULL;
605 ci->i_xattrs.dirty = false;
606 ci->i_xattrs.index = RB_ROOT;
607 ci->i_xattrs.count = 0;
608 ci->i_xattrs.names_size = 0;
609 ci->i_xattrs.vals_size = 0;
610 ci->i_xattrs.version = 0;
611 ci->i_xattrs.index_version = 0;
612
613 ci->i_caps = RB_ROOT;
614 ci->i_auth_cap = NULL;
615 ci->i_dirty_caps = 0;
616 ci->i_flushing_caps = 0;
617 INIT_LIST_HEAD(&ci->i_dirty_item);
618 INIT_LIST_HEAD(&ci->i_flushing_item);
619 ci->i_prealloc_cap_flush = NULL;
620 INIT_LIST_HEAD(&ci->i_cap_flush_list);
621 init_waitqueue_head(&ci->i_cap_wq);
622 ci->i_hold_caps_max = 0;
623 INIT_LIST_HEAD(&ci->i_cap_delay_list);
624 INIT_LIST_HEAD(&ci->i_cap_snaps);
625 ci->i_head_snapc = NULL;
626 ci->i_snap_caps = 0;
627
628 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ;
629 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
630 ci->i_nr_by_mode[i] = 0;
631
632 mutex_init(&ci->i_truncate_mutex);
633 ci->i_truncate_seq = 0;
634 ci->i_truncate_size = 0;
635 ci->i_truncate_pending = 0;
636 ci->i_truncate_pagecache_size = 0;
637
638 ci->i_max_size = 0;
639 ci->i_reported_size = 0;
640 ci->i_wanted_max_size = 0;
641 ci->i_requested_max_size = 0;
642
643 ci->i_pin_ref = 0;
644 ci->i_rd_ref = 0;
645 ci->i_rdcache_ref = 0;
646 ci->i_wr_ref = 0;
647 ci->i_wb_ref = 0;
648 ci->i_fx_ref = 0;
649 ci->i_wrbuffer_ref = 0;
650 ci->i_wrbuffer_ref_head = 0;
651 atomic_set(&ci->i_filelock_ref, 0);
652 atomic_set(&ci->i_shared_gen, 1);
653 ci->i_rdcache_gen = 0;
654 ci->i_rdcache_revoking = 0;
655
656 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
657 INIT_LIST_HEAD(&ci->i_unsafe_iops);
658 spin_lock_init(&ci->i_unsafe_lock);
659
660 ci->i_snap_realm = NULL;
661 INIT_LIST_HEAD(&ci->i_snap_realm_item);
662 INIT_LIST_HEAD(&ci->i_snap_flush_item);
663
664 INIT_WORK(&ci->i_work, ceph_inode_work);
665 ci->i_work_mask = 0;
666 memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
667#ifdef CONFIG_FS_ENCRYPTION
668 ci->fscrypt_auth = NULL;
669 ci->fscrypt_auth_len = 0;
670#endif
671 return &ci->netfs.inode;
672}
673
674void ceph_free_inode(struct inode *inode)
675{
676 struct ceph_inode_info *ci = ceph_inode(inode);
677
678 kfree(ci->i_symlink);
679#ifdef CONFIG_FS_ENCRYPTION
680 kfree(ci->fscrypt_auth);
681#endif
682 fscrypt_free_inode(inode);
683 kmem_cache_free(ceph_inode_cachep, ci);
684}
685
686void ceph_evict_inode(struct inode *inode)
687{
688 struct ceph_inode_info *ci = ceph_inode(inode);
689 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
690 struct ceph_client *cl = ceph_inode_to_client(inode);
691 struct ceph_inode_frag *frag;
692 struct rb_node *n;
693
694 doutc(cl, "%p ino %llx.%llx\n", inode, ceph_vinop(inode));
695
696 percpu_counter_dec(&mdsc->metric.total_inodes);
697
698 truncate_inode_pages_final(&inode->i_data);
699 if (inode->i_state & I_PINNING_NETFS_WB)
700 ceph_fscache_unuse_cookie(inode, true);
701 clear_inode(inode);
702
703 ceph_fscache_unregister_inode_cookie(ci);
704 fscrypt_put_encryption_info(inode);
705
706 __ceph_remove_caps(ci);
707
708 if (__ceph_has_quota(ci, QUOTA_GET_ANY))
709 ceph_adjust_quota_realms_count(inode, false);
710
711 /*
712 * we may still have a snap_realm reference if there are stray
713 * caps in i_snap_caps.
714 */
715 if (ci->i_snap_realm) {
716 if (ceph_snap(inode) == CEPH_NOSNAP) {
717 doutc(cl, " dropping residual ref to snap realm %p\n",
718 ci->i_snap_realm);
719 ceph_change_snap_realm(inode, NULL);
720 } else {
721 ceph_put_snapid_map(mdsc, ci->i_snapid_map);
722 ci->i_snap_realm = NULL;
723 }
724 }
725
726 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
727 frag = rb_entry(n, struct ceph_inode_frag, node);
728 rb_erase(n, &ci->i_fragtree);
729 kfree(frag);
730 }
731 ci->i_fragtree_nsplits = 0;
732
733 __ceph_destroy_xattrs(ci);
734 if (ci->i_xattrs.blob)
735 ceph_buffer_put(ci->i_xattrs.blob);
736 if (ci->i_xattrs.prealloc_blob)
737 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
738
739 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
740 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns));
741}
742
743static inline blkcnt_t calc_inode_blocks(u64 size)
744{
745 return (size + (1<<9) - 1) >> 9;
746}
747
748/*
749 * Helpers to fill in size, ctime, mtime, and atime. We have to be
750 * careful because either the client or MDS may have more up to date
751 * info, depending on which capabilities are held, and whether
752 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
753 * and size are monotonically increasing, except when utimes() or
754 * truncate() increments the corresponding _seq values.)
755 */
756int ceph_fill_file_size(struct inode *inode, int issued,
757 u32 truncate_seq, u64 truncate_size, u64 size)
758{
759 struct ceph_client *cl = ceph_inode_to_client(inode);
760 struct ceph_inode_info *ci = ceph_inode(inode);
761 int queue_trunc = 0;
762 loff_t isize = i_size_read(inode);
763
764 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
765 (truncate_seq == ci->i_truncate_seq && size > isize)) {
766 doutc(cl, "size %lld -> %llu\n", isize, size);
767 if (size > 0 && S_ISDIR(inode->i_mode)) {
768 pr_err_client(cl, "non-zero size for directory\n");
769 size = 0;
770 }
771 i_size_write(inode, size);
772 inode->i_blocks = calc_inode_blocks(size);
773 /*
774 * If we're expanding, then we should be able to just update
775 * the existing cookie.
776 */
777 if (size > isize)
778 ceph_fscache_update(inode);
779 ci->i_reported_size = size;
780 if (truncate_seq != ci->i_truncate_seq) {
781 doutc(cl, "truncate_seq %u -> %u\n",
782 ci->i_truncate_seq, truncate_seq);
783 ci->i_truncate_seq = truncate_seq;
784
785 /* the MDS should have revoked these caps */
786 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD |
787 CEPH_CAP_FILE_LAZYIO));
788 /*
789 * If we hold relevant caps, or in the case where we're
790 * not the only client referencing this file and we
791 * don't hold those caps, then we need to check whether
792 * the file is either opened or mmaped
793 */
794 if ((issued & (CEPH_CAP_FILE_CACHE|
795 CEPH_CAP_FILE_BUFFER)) ||
796 mapping_mapped(inode->i_mapping) ||
797 __ceph_is_file_opened(ci)) {
798 ci->i_truncate_pending++;
799 queue_trunc = 1;
800 }
801 }
802 }
803
804 /*
805 * It's possible that the new sizes of the two consecutive
806 * size truncations will be in the same fscrypt last block,
807 * and we need to truncate the corresponding page caches
808 * anyway.
809 */
810 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) {
811 doutc(cl, "truncate_size %lld -> %llu, encrypted %d\n",
812 ci->i_truncate_size, truncate_size,
813 !!IS_ENCRYPTED(inode));
814
815 ci->i_truncate_size = truncate_size;
816
817 if (IS_ENCRYPTED(inode)) {
818 doutc(cl, "truncate_pagecache_size %lld -> %llu\n",
819 ci->i_truncate_pagecache_size, size);
820 ci->i_truncate_pagecache_size = size;
821 } else {
822 ci->i_truncate_pagecache_size = truncate_size;
823 }
824 }
825 return queue_trunc;
826}
827
828void ceph_fill_file_time(struct inode *inode, int issued,
829 u64 time_warp_seq, struct timespec64 *ctime,
830 struct timespec64 *mtime, struct timespec64 *atime)
831{
832 struct ceph_client *cl = ceph_inode_to_client(inode);
833 struct ceph_inode_info *ci = ceph_inode(inode);
834 struct timespec64 ictime = inode_get_ctime(inode);
835 int warn = 0;
836
837 if (issued & (CEPH_CAP_FILE_EXCL|
838 CEPH_CAP_FILE_WR|
839 CEPH_CAP_FILE_BUFFER|
840 CEPH_CAP_AUTH_EXCL|
841 CEPH_CAP_XATTR_EXCL)) {
842 if (ci->i_version == 0 ||
843 timespec64_compare(ctime, &ictime) > 0) {
844 doutc(cl, "ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
845 ictime.tv_sec, ictime.tv_nsec,
846 ctime->tv_sec, ctime->tv_nsec);
847 inode_set_ctime_to_ts(inode, *ctime);
848 }
849 if (ci->i_version == 0 ||
850 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
851 /* the MDS did a utimes() */
852 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld tw %d -> %d\n",
853 inode_get_mtime_sec(inode),
854 inode_get_mtime_nsec(inode),
855 mtime->tv_sec, mtime->tv_nsec,
856 ci->i_time_warp_seq, (int)time_warp_seq);
857
858 inode_set_mtime_to_ts(inode, *mtime);
859 inode_set_atime_to_ts(inode, *atime);
860 ci->i_time_warp_seq = time_warp_seq;
861 } else if (time_warp_seq == ci->i_time_warp_seq) {
862 struct timespec64 ts;
863
864 /* nobody did utimes(); take the max */
865 ts = inode_get_mtime(inode);
866 if (timespec64_compare(mtime, &ts) > 0) {
867 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld inc\n",
868 ts.tv_sec, ts.tv_nsec,
869 mtime->tv_sec, mtime->tv_nsec);
870 inode_set_mtime_to_ts(inode, *mtime);
871 }
872 ts = inode_get_atime(inode);
873 if (timespec64_compare(atime, &ts) > 0) {
874 doutc(cl, "atime %lld.%09ld -> %lld.%09ld inc\n",
875 ts.tv_sec, ts.tv_nsec,
876 atime->tv_sec, atime->tv_nsec);
877 inode_set_atime_to_ts(inode, *atime);
878 }
879 } else if (issued & CEPH_CAP_FILE_EXCL) {
880 /* we did a utimes(); ignore mds values */
881 } else {
882 warn = 1;
883 }
884 } else {
885 /* we have no write|excl caps; whatever the MDS says is true */
886 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
887 inode_set_ctime_to_ts(inode, *ctime);
888 inode_set_mtime_to_ts(inode, *mtime);
889 inode_set_atime_to_ts(inode, *atime);
890 ci->i_time_warp_seq = time_warp_seq;
891 } else {
892 warn = 1;
893 }
894 }
895 if (warn) /* time_warp_seq shouldn't go backwards */
896 doutc(cl, "%p mds time_warp_seq %llu < %u\n", inode,
897 time_warp_seq, ci->i_time_warp_seq);
898}
899
900#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
901static int decode_encrypted_symlink(struct ceph_mds_client *mdsc,
902 const char *encsym,
903 int enclen, u8 **decsym)
904{
905 struct ceph_client *cl = mdsc->fsc->client;
906 int declen;
907 u8 *sym;
908
909 sym = kmalloc(enclen + 1, GFP_NOFS);
910 if (!sym)
911 return -ENOMEM;
912
913 declen = ceph_base64_decode(encsym, enclen, sym);
914 if (declen < 0) {
915 pr_err_client(cl,
916 "can't decode symlink (%d). Content: %.*s\n",
917 declen, enclen, encsym);
918 kfree(sym);
919 return -EIO;
920 }
921 sym[declen + 1] = '\0';
922 *decsym = sym;
923 return declen;
924}
925#else
926static int decode_encrypted_symlink(struct ceph_mds_client *mdsc,
927 const char *encsym,
928 int symlen, u8 **decsym)
929{
930 return -EOPNOTSUPP;
931}
932#endif
933
934/*
935 * Populate an inode based on info from mds. May be called on new or
936 * existing inodes.
937 */
938int ceph_fill_inode(struct inode *inode, struct page *locked_page,
939 struct ceph_mds_reply_info_in *iinfo,
940 struct ceph_mds_reply_dirfrag *dirinfo,
941 struct ceph_mds_session *session, int cap_fmode,
942 struct ceph_cap_reservation *caps_reservation)
943{
944 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
945 struct ceph_client *cl = mdsc->fsc->client;
946 struct ceph_mds_reply_inode *info = iinfo->in;
947 struct ceph_inode_info *ci = ceph_inode(inode);
948 int issued, new_issued, info_caps;
949 struct timespec64 mtime, atime, ctime;
950 struct ceph_buffer *xattr_blob = NULL;
951 struct ceph_buffer *old_blob = NULL;
952 struct ceph_string *pool_ns = NULL;
953 struct ceph_cap *new_cap = NULL;
954 int err = 0;
955 bool wake = false;
956 bool queue_trunc = false;
957 bool new_version = false;
958 bool fill_inline = false;
959 umode_t mode = le32_to_cpu(info->mode);
960 dev_t rdev = le32_to_cpu(info->rdev);
961
962 lockdep_assert_held(&mdsc->snap_rwsem);
963
964 doutc(cl, "%p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode),
965 le64_to_cpu(info->version), ci->i_version);
966
967 /* Once I_NEW is cleared, we can't change type or dev numbers */
968 if (inode->i_state & I_NEW) {
969 inode->i_mode = mode;
970 } else {
971 if (inode_wrong_type(inode, mode)) {
972 pr_warn_once_client(cl,
973 "inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n",
974 ceph_vinop(inode), inode->i_mode, mode);
975 return -ESTALE;
976 }
977
978 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) {
979 pr_warn_once_client(cl,
980 "dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n",
981 ceph_vinop(inode), MAJOR(inode->i_rdev),
982 MINOR(inode->i_rdev), MAJOR(rdev),
983 MINOR(rdev));
984 return -ESTALE;
985 }
986 }
987
988 info_caps = le32_to_cpu(info->cap.caps);
989
990 /* prealloc new cap struct */
991 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) {
992 new_cap = ceph_get_cap(mdsc, caps_reservation);
993 if (!new_cap)
994 return -ENOMEM;
995 }
996
997 /*
998 * prealloc xattr data, if it looks like we'll need it. only
999 * if len > 4 (meaning there are actually xattrs; the first 4
1000 * bytes are the xattr count).
1001 */
1002 if (iinfo->xattr_len > 4) {
1003 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
1004 if (!xattr_blob)
1005 pr_err_client(cl, "ENOMEM xattr blob %d bytes\n",
1006 iinfo->xattr_len);
1007 }
1008
1009 if (iinfo->pool_ns_len > 0)
1010 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
1011 iinfo->pool_ns_len);
1012
1013 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map)
1014 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode));
1015
1016 spin_lock(&ci->i_ceph_lock);
1017
1018 /*
1019 * provided version will be odd if inode value is projected,
1020 * even if stable. skip the update if we have newer stable
1021 * info (ours>=theirs, e.g. due to racing mds replies), unless
1022 * we are getting projected (unstable) info (in which case the
1023 * version is odd, and we want ours>theirs).
1024 * us them
1025 * 2 2 skip
1026 * 3 2 skip
1027 * 3 3 update
1028 */
1029 if (ci->i_version == 0 ||
1030 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
1031 le64_to_cpu(info->version) > (ci->i_version & ~1)))
1032 new_version = true;
1033
1034 /* Update change_attribute */
1035 inode_set_max_iversion_raw(inode, iinfo->change_attr);
1036
1037 __ceph_caps_issued(ci, &issued);
1038 issued |= __ceph_caps_dirty(ci);
1039 new_issued = ~issued & info_caps;
1040
1041 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
1042
1043#ifdef CONFIG_FS_ENCRYPTION
1044 if (iinfo->fscrypt_auth_len &&
1045 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) {
1046 kfree(ci->fscrypt_auth);
1047 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len;
1048 ci->fscrypt_auth = iinfo->fscrypt_auth;
1049 iinfo->fscrypt_auth = NULL;
1050 iinfo->fscrypt_auth_len = 0;
1051 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);
1052 }
1053#endif
1054
1055 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
1056 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
1057 inode->i_mode = mode;
1058 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
1059 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
1060 doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode,
1061 ceph_vinop(inode), inode->i_mode,
1062 from_kuid(&init_user_ns, inode->i_uid),
1063 from_kgid(&init_user_ns, inode->i_gid));
1064 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
1065 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
1066 }
1067
1068 /* directories have fl_stripe_unit set to zero */
1069 if (IS_ENCRYPTED(inode))
1070 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT;
1071 else if (le32_to_cpu(info->layout.fl_stripe_unit))
1072 inode->i_blkbits =
1073 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
1074 else
1075 inode->i_blkbits = CEPH_BLOCK_SHIFT;
1076
1077 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
1078 (issued & CEPH_CAP_LINK_EXCL) == 0)
1079 set_nlink(inode, le32_to_cpu(info->nlink));
1080
1081 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
1082 /* be careful with mtime, atime, size */
1083 ceph_decode_timespec64(&atime, &info->atime);
1084 ceph_decode_timespec64(&mtime, &info->mtime);
1085 ceph_decode_timespec64(&ctime, &info->ctime);
1086 ceph_fill_file_time(inode, issued,
1087 le32_to_cpu(info->time_warp_seq),
1088 &ctime, &mtime, &atime);
1089 }
1090
1091 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) {
1092 ci->i_files = le64_to_cpu(info->files);
1093 ci->i_subdirs = le64_to_cpu(info->subdirs);
1094 }
1095
1096 if (new_version ||
1097 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
1098 u64 size = le64_to_cpu(info->size);
1099 s64 old_pool = ci->i_layout.pool_id;
1100 struct ceph_string *old_ns;
1101
1102 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
1103 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
1104 lockdep_is_held(&ci->i_ceph_lock));
1105 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
1106
1107 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
1108 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
1109
1110 pool_ns = old_ns;
1111
1112 if (IS_ENCRYPTED(inode) && size &&
1113 iinfo->fscrypt_file_len == sizeof(__le64)) {
1114 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file);
1115
1116 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) {
1117 size = fsize;
1118 } else {
1119 pr_warn_client(cl,
1120 "fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n",
1121 info->size, size);
1122 }
1123 }
1124
1125 queue_trunc = ceph_fill_file_size(inode, issued,
1126 le32_to_cpu(info->truncate_seq),
1127 le64_to_cpu(info->truncate_size),
1128 size);
1129 /* only update max_size on auth cap */
1130 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
1131 ci->i_max_size != le64_to_cpu(info->max_size)) {
1132 doutc(cl, "max_size %lld -> %llu\n",
1133 ci->i_max_size, le64_to_cpu(info->max_size));
1134 ci->i_max_size = le64_to_cpu(info->max_size);
1135 }
1136 }
1137
1138 /* layout and rstat are not tracked by capability, update them if
1139 * the inode info is from auth mds */
1140 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) {
1141 if (S_ISDIR(inode->i_mode)) {
1142 ci->i_dir_layout = iinfo->dir_layout;
1143 ci->i_rbytes = le64_to_cpu(info->rbytes);
1144 ci->i_rfiles = le64_to_cpu(info->rfiles);
1145 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
1146 ci->i_dir_pin = iinfo->dir_pin;
1147 ci->i_rsnaps = iinfo->rsnaps;
1148 ceph_decode_timespec64(&ci->i_rctime, &info->rctime);
1149 }
1150 }
1151
1152 /* xattrs */
1153 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
1154 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
1155 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
1156 if (ci->i_xattrs.blob)
1157 old_blob = ci->i_xattrs.blob;
1158 ci->i_xattrs.blob = xattr_blob;
1159 if (xattr_blob)
1160 memcpy(ci->i_xattrs.blob->vec.iov_base,
1161 iinfo->xattr_data, iinfo->xattr_len);
1162 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
1163 ceph_forget_all_cached_acls(inode);
1164 ceph_security_invalidate_secctx(inode);
1165 xattr_blob = NULL;
1166 }
1167
1168 /* finally update i_version */
1169 if (le64_to_cpu(info->version) > ci->i_version)
1170 ci->i_version = le64_to_cpu(info->version);
1171
1172 inode->i_mapping->a_ops = &ceph_aops;
1173
1174 switch (inode->i_mode & S_IFMT) {
1175 case S_IFIFO:
1176 case S_IFBLK:
1177 case S_IFCHR:
1178 case S_IFSOCK:
1179 inode->i_blkbits = PAGE_SHIFT;
1180 init_special_inode(inode, inode->i_mode, rdev);
1181 inode->i_op = &ceph_file_iops;
1182 break;
1183 case S_IFREG:
1184 inode->i_op = &ceph_file_iops;
1185 inode->i_fop = &ceph_file_fops;
1186 break;
1187 case S_IFLNK:
1188 if (!ci->i_symlink) {
1189 u32 symlen = iinfo->symlink_len;
1190 char *sym;
1191
1192 spin_unlock(&ci->i_ceph_lock);
1193
1194 if (IS_ENCRYPTED(inode)) {
1195 if (symlen != i_size_read(inode))
1196 pr_err_client(cl,
1197 "%p %llx.%llx BAD symlink size %lld\n",
1198 inode, ceph_vinop(inode),
1199 i_size_read(inode));
1200
1201 err = decode_encrypted_symlink(mdsc, iinfo->symlink,
1202 symlen, (u8 **)&sym);
1203 if (err < 0) {
1204 pr_err_client(cl,
1205 "decoding encrypted symlink failed: %d\n",
1206 err);
1207 goto out;
1208 }
1209 symlen = err;
1210 i_size_write(inode, symlen);
1211 inode->i_blocks = calc_inode_blocks(symlen);
1212 } else {
1213 if (symlen != i_size_read(inode)) {
1214 pr_err_client(cl,
1215 "%p %llx.%llx BAD symlink size %lld\n",
1216 inode, ceph_vinop(inode),
1217 i_size_read(inode));
1218 i_size_write(inode, symlen);
1219 inode->i_blocks = calc_inode_blocks(symlen);
1220 }
1221
1222 err = -ENOMEM;
1223 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
1224 if (!sym)
1225 goto out;
1226 }
1227
1228 spin_lock(&ci->i_ceph_lock);
1229 if (!ci->i_symlink)
1230 ci->i_symlink = sym;
1231 else
1232 kfree(sym); /* lost a race */
1233 }
1234
1235 if (IS_ENCRYPTED(inode)) {
1236 /*
1237 * Encrypted symlinks need to be decrypted before we can
1238 * cache their targets in i_link. Don't touch it here.
1239 */
1240 inode->i_op = &ceph_encrypted_symlink_iops;
1241 } else {
1242 inode->i_link = ci->i_symlink;
1243 inode->i_op = &ceph_symlink_iops;
1244 }
1245 break;
1246 case S_IFDIR:
1247 inode->i_op = &ceph_dir_iops;
1248 inode->i_fop = &ceph_dir_fops;
1249 break;
1250 default:
1251 pr_err_client(cl, "%p %llx.%llx BAD mode 0%o\n", inode,
1252 ceph_vinop(inode), inode->i_mode);
1253 }
1254
1255 /* were we issued a capability? */
1256 if (info_caps) {
1257 if (ceph_snap(inode) == CEPH_NOSNAP) {
1258 ceph_add_cap(inode, session,
1259 le64_to_cpu(info->cap.cap_id),
1260 info_caps,
1261 le32_to_cpu(info->cap.wanted),
1262 le32_to_cpu(info->cap.seq),
1263 le32_to_cpu(info->cap.mseq),
1264 le64_to_cpu(info->cap.realm),
1265 info->cap.flags, &new_cap);
1266
1267 /* set dir completion flag? */
1268 if (S_ISDIR(inode->i_mode) &&
1269 ci->i_files == 0 && ci->i_subdirs == 0 &&
1270 (info_caps & CEPH_CAP_FILE_SHARED) &&
1271 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
1272 !__ceph_dir_is_complete(ci)) {
1273 doutc(cl, " marking %p complete (empty)\n",
1274 inode);
1275 i_size_write(inode, 0);
1276 __ceph_dir_set_complete(ci,
1277 atomic64_read(&ci->i_release_count),
1278 atomic64_read(&ci->i_ordered_count));
1279 }
1280
1281 wake = true;
1282 } else {
1283 doutc(cl, " %p got snap_caps %s\n", inode,
1284 ceph_cap_string(info_caps));
1285 ci->i_snap_caps |= info_caps;
1286 }
1287 }
1288
1289 if (iinfo->inline_version > 0 &&
1290 iinfo->inline_version >= ci->i_inline_version) {
1291 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1292 ci->i_inline_version = iinfo->inline_version;
1293 if (ceph_has_inline_data(ci) &&
1294 (locked_page || (info_caps & cache_caps)))
1295 fill_inline = true;
1296 }
1297
1298 if (cap_fmode >= 0) {
1299 if (!info_caps)
1300 pr_warn_client(cl, "mds issued no caps on %llx.%llx\n",
1301 ceph_vinop(inode));
1302 __ceph_touch_fmode(ci, mdsc, cap_fmode);
1303 }
1304
1305 spin_unlock(&ci->i_ceph_lock);
1306
1307 ceph_fscache_register_inode_cookie(inode);
1308
1309 if (fill_inline)
1310 ceph_fill_inline_data(inode, locked_page,
1311 iinfo->inline_data, iinfo->inline_len);
1312
1313 if (wake)
1314 wake_up_all(&ci->i_cap_wq);
1315
1316 /* queue truncate if we saw i_size decrease */
1317 if (queue_trunc)
1318 ceph_queue_vmtruncate(inode);
1319
1320 /* populate frag tree */
1321 if (S_ISDIR(inode->i_mode))
1322 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
1323
1324 /* update delegation info? */
1325 if (dirinfo)
1326 ceph_fill_dirfrag(inode, dirinfo);
1327
1328 err = 0;
1329out:
1330 if (new_cap)
1331 ceph_put_cap(mdsc, new_cap);
1332 ceph_buffer_put(old_blob);
1333 ceph_buffer_put(xattr_blob);
1334 ceph_put_string(pool_ns);
1335 return err;
1336}
1337
1338/*
1339 * caller should hold session s_mutex and dentry->d_lock.
1340 */
1341static void __update_dentry_lease(struct inode *dir, struct dentry *dentry,
1342 struct ceph_mds_reply_lease *lease,
1343 struct ceph_mds_session *session,
1344 unsigned long from_time,
1345 struct ceph_mds_session **old_lease_session)
1346{
1347 struct ceph_client *cl = ceph_inode_to_client(dir);
1348 struct ceph_dentry_info *di = ceph_dentry(dentry);
1349 unsigned mask = le16_to_cpu(lease->mask);
1350 long unsigned duration = le32_to_cpu(lease->duration_ms);
1351 long unsigned ttl = from_time + (duration * HZ) / 1000;
1352 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
1353
1354 doutc(cl, "%p duration %lu ms ttl %lu\n", dentry, duration, ttl);
1355
1356 /* only track leases on regular dentries */
1357 if (ceph_snap(dir) != CEPH_NOSNAP)
1358 return;
1359
1360 if (mask & CEPH_LEASE_PRIMARY_LINK)
1361 di->flags |= CEPH_DENTRY_PRIMARY_LINK;
1362 else
1363 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK;
1364
1365 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
1366 if (!(mask & CEPH_LEASE_VALID)) {
1367 __ceph_dentry_dir_lease_touch(di);
1368 return;
1369 }
1370
1371 if (di->lease_gen == atomic_read(&session->s_cap_gen) &&
1372 time_before(ttl, di->time))
1373 return; /* we already have a newer lease. */
1374
1375 if (di->lease_session && di->lease_session != session) {
1376 *old_lease_session = di->lease_session;
1377 di->lease_session = NULL;
1378 }
1379
1380 if (!di->lease_session)
1381 di->lease_session = ceph_get_mds_session(session);
1382 di->lease_gen = atomic_read(&session->s_cap_gen);
1383 di->lease_seq = le32_to_cpu(lease->seq);
1384 di->lease_renew_after = half_ttl;
1385 di->lease_renew_from = 0;
1386 di->time = ttl;
1387
1388 __ceph_dentry_lease_touch(di);
1389}
1390
1391static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry,
1392 struct ceph_mds_reply_lease *lease,
1393 struct ceph_mds_session *session,
1394 unsigned long from_time)
1395{
1396 struct ceph_mds_session *old_lease_session = NULL;
1397 spin_lock(&dentry->d_lock);
1398 __update_dentry_lease(dir, dentry, lease, session, from_time,
1399 &old_lease_session);
1400 spin_unlock(&dentry->d_lock);
1401 ceph_put_mds_session(old_lease_session);
1402}
1403
1404/*
1405 * update dentry lease without having parent inode locked
1406 */
1407static void update_dentry_lease_careful(struct dentry *dentry,
1408 struct ceph_mds_reply_lease *lease,
1409 struct ceph_mds_session *session,
1410 unsigned long from_time,
1411 char *dname, u32 dname_len,
1412 struct ceph_vino *pdvino,
1413 struct ceph_vino *ptvino)
1414
1415{
1416 struct inode *dir;
1417 struct ceph_mds_session *old_lease_session = NULL;
1418
1419 spin_lock(&dentry->d_lock);
1420 /* make sure dentry's name matches target */
1421 if (dentry->d_name.len != dname_len ||
1422 memcmp(dentry->d_name.name, dname, dname_len))
1423 goto out_unlock;
1424
1425 dir = d_inode(dentry->d_parent);
1426 /* make sure parent matches dvino */
1427 if (!ceph_ino_compare(dir, pdvino))
1428 goto out_unlock;
1429
1430 /* make sure dentry's inode matches target. NULL ptvino means that
1431 * we expect a negative dentry */
1432 if (ptvino) {
1433 if (d_really_is_negative(dentry))
1434 goto out_unlock;
1435 if (!ceph_ino_compare(d_inode(dentry), ptvino))
1436 goto out_unlock;
1437 } else {
1438 if (d_really_is_positive(dentry))
1439 goto out_unlock;
1440 }
1441
1442 __update_dentry_lease(dir, dentry, lease, session,
1443 from_time, &old_lease_session);
1444out_unlock:
1445 spin_unlock(&dentry->d_lock);
1446 ceph_put_mds_session(old_lease_session);
1447}
1448
1449/*
1450 * splice a dentry to an inode.
1451 * caller must hold directory i_rwsem for this to be safe.
1452 */
1453static int splice_dentry(struct dentry **pdn, struct inode *in)
1454{
1455 struct ceph_client *cl = ceph_inode_to_client(in);
1456 struct dentry *dn = *pdn;
1457 struct dentry *realdn;
1458
1459 BUG_ON(d_inode(dn));
1460
1461 if (S_ISDIR(in->i_mode)) {
1462 /* If inode is directory, d_splice_alias() below will remove
1463 * 'realdn' from its origin parent. We need to ensure that
1464 * origin parent's readdir cache will not reference 'realdn'
1465 */
1466 realdn = d_find_any_alias(in);
1467 if (realdn) {
1468 struct ceph_dentry_info *di = ceph_dentry(realdn);
1469 spin_lock(&realdn->d_lock);
1470
1471 realdn->d_op->d_prune(realdn);
1472
1473 di->time = jiffies;
1474 di->lease_shared_gen = 0;
1475 di->offset = 0;
1476
1477 spin_unlock(&realdn->d_lock);
1478 dput(realdn);
1479 }
1480 }
1481
1482 /* dn must be unhashed */
1483 if (!d_unhashed(dn))
1484 d_drop(dn);
1485 realdn = d_splice_alias(in, dn);
1486 if (IS_ERR(realdn)) {
1487 pr_err_client(cl, "error %ld %p inode %p ino %llx.%llx\n",
1488 PTR_ERR(realdn), dn, in, ceph_vinop(in));
1489 return PTR_ERR(realdn);
1490 }
1491
1492 if (realdn) {
1493 doutc(cl, "dn %p (%d) spliced with %p (%d) inode %p ino %llx.%llx\n",
1494 dn, d_count(dn), realdn, d_count(realdn),
1495 d_inode(realdn), ceph_vinop(d_inode(realdn)));
1496 dput(dn);
1497 *pdn = realdn;
1498 } else {
1499 BUG_ON(!ceph_dentry(dn));
1500 doutc(cl, "dn %p attached to %p ino %llx.%llx\n", dn,
1501 d_inode(dn), ceph_vinop(d_inode(dn)));
1502 }
1503 return 0;
1504}
1505
1506/*
1507 * Incorporate results into the local cache. This is either just
1508 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1509 * after a lookup).
1510 *
1511 * A reply may contain
1512 * a directory inode along with a dentry.
1513 * and/or a target inode
1514 *
1515 * Called with snap_rwsem (read).
1516 */
1517int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
1518{
1519 struct ceph_mds_session *session = req->r_session;
1520 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1521 struct inode *in = NULL;
1522 struct ceph_vino tvino, dvino;
1523 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
1524 struct ceph_client *cl = fsc->client;
1525 int err = 0;
1526
1527 doutc(cl, "%p is_dentry %d is_target %d\n", req,
1528 rinfo->head->is_dentry, rinfo->head->is_target);
1529
1530 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1531 doutc(cl, "reply is empty!\n");
1532 if (rinfo->head->result == 0 && req->r_parent)
1533 ceph_invalidate_dir_request(req);
1534 return 0;
1535 }
1536
1537 if (rinfo->head->is_dentry) {
1538 struct inode *dir = req->r_parent;
1539
1540 if (dir) {
1541 err = ceph_fill_inode(dir, NULL, &rinfo->diri,
1542 rinfo->dirfrag, session, -1,
1543 &req->r_caps_reservation);
1544 if (err < 0)
1545 goto done;
1546 } else {
1547 WARN_ON_ONCE(1);
1548 }
1549
1550 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME &&
1551 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1552 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1553 bool is_nokey = false;
1554 struct qstr dname;
1555 struct dentry *dn, *parent;
1556 struct fscrypt_str oname = FSTR_INIT(NULL, 0);
1557 struct ceph_fname fname = { .dir = dir,
1558 .name = rinfo->dname,
1559 .ctext = rinfo->altname,
1560 .name_len = rinfo->dname_len,
1561 .ctext_len = rinfo->altname_len };
1562
1563 BUG_ON(!rinfo->head->is_target);
1564 BUG_ON(req->r_dentry);
1565
1566 parent = d_find_any_alias(dir);
1567 BUG_ON(!parent);
1568
1569 err = ceph_fname_alloc_buffer(dir, &oname);
1570 if (err < 0) {
1571 dput(parent);
1572 goto done;
1573 }
1574
1575 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey);
1576 if (err < 0) {
1577 dput(parent);
1578 ceph_fname_free_buffer(dir, &oname);
1579 goto done;
1580 }
1581 dname.name = oname.name;
1582 dname.len = oname.len;
1583 dname.hash = full_name_hash(parent, dname.name, dname.len);
1584 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1585 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1586retry_lookup:
1587 dn = d_lookup(parent, &dname);
1588 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n",
1589 parent, dname.len, dname.name, dn);
1590
1591 if (!dn) {
1592 dn = d_alloc(parent, &dname);
1593 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent,
1594 dname.len, dname.name, dn);
1595 if (!dn) {
1596 dput(parent);
1597 ceph_fname_free_buffer(dir, &oname);
1598 err = -ENOMEM;
1599 goto done;
1600 }
1601 if (is_nokey) {
1602 spin_lock(&dn->d_lock);
1603 dn->d_flags |= DCACHE_NOKEY_NAME;
1604 spin_unlock(&dn->d_lock);
1605 }
1606 err = 0;
1607 } else if (d_really_is_positive(dn) &&
1608 (ceph_ino(d_inode(dn)) != tvino.ino ||
1609 ceph_snap(d_inode(dn)) != tvino.snap)) {
1610 doutc(cl, " dn %p points to wrong inode %p\n",
1611 dn, d_inode(dn));
1612 ceph_dir_clear_ordered(dir);
1613 d_delete(dn);
1614 dput(dn);
1615 goto retry_lookup;
1616 }
1617 ceph_fname_free_buffer(dir, &oname);
1618
1619 req->r_dentry = dn;
1620 dput(parent);
1621 }
1622 }
1623
1624 if (rinfo->head->is_target) {
1625 /* Should be filled in by handle_reply */
1626 BUG_ON(!req->r_target_inode);
1627
1628 in = req->r_target_inode;
1629 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti,
1630 NULL, session,
1631 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1632 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) &&
1633 rinfo->head->result == 0) ? req->r_fmode : -1,
1634 &req->r_caps_reservation);
1635 if (err < 0) {
1636 pr_err_client(cl, "badness %p %llx.%llx\n", in,
1637 ceph_vinop(in));
1638 req->r_target_inode = NULL;
1639 if (in->i_state & I_NEW)
1640 discard_new_inode(in);
1641 else
1642 iput(in);
1643 goto done;
1644 }
1645 if (in->i_state & I_NEW)
1646 unlock_new_inode(in);
1647 }
1648
1649 /*
1650 * ignore null lease/binding on snapdir ENOENT, or else we
1651 * will have trouble splicing in the virtual snapdir later
1652 */
1653 if (rinfo->head->is_dentry &&
1654 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1655 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1656 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1657 fsc->mount_options->snapdir_name,
1658 req->r_dentry->d_name.len))) {
1659 /*
1660 * lookup link rename : null -> possibly existing inode
1661 * mknod symlink mkdir : null -> new inode
1662 * unlink : linked -> null
1663 */
1664 struct inode *dir = req->r_parent;
1665 struct dentry *dn = req->r_dentry;
1666 bool have_dir_cap, have_lease;
1667
1668 BUG_ON(!dn);
1669 BUG_ON(!dir);
1670 BUG_ON(d_inode(dn->d_parent) != dir);
1671
1672 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1673 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1674
1675 BUG_ON(ceph_ino(dir) != dvino.ino);
1676 BUG_ON(ceph_snap(dir) != dvino.snap);
1677
1678 /* do we have a lease on the whole dir? */
1679 have_dir_cap =
1680 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1681 CEPH_CAP_FILE_SHARED);
1682
1683 /* do we have a dn lease? */
1684 have_lease = have_dir_cap ||
1685 le32_to_cpu(rinfo->dlease->duration_ms);
1686 if (!have_lease)
1687 doutc(cl, "no dentry lease or dir cap\n");
1688
1689 /* rename? */
1690 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1691 struct inode *olddir = req->r_old_dentry_dir;
1692 BUG_ON(!olddir);
1693
1694 doutc(cl, " src %p '%pd' dst %p '%pd'\n",
1695 req->r_old_dentry, req->r_old_dentry, dn, dn);
1696 doutc(cl, "doing d_move %p -> %p\n", req->r_old_dentry, dn);
1697
1698 /* d_move screws up sibling dentries' offsets */
1699 ceph_dir_clear_ordered(dir);
1700 ceph_dir_clear_ordered(olddir);
1701
1702 d_move(req->r_old_dentry, dn);
1703 doutc(cl, " src %p '%pd' dst %p '%pd'\n",
1704 req->r_old_dentry, req->r_old_dentry, dn, dn);
1705
1706 /* ensure target dentry is invalidated, despite
1707 rehashing bug in vfs_rename_dir */
1708 ceph_invalidate_dentry_lease(dn);
1709
1710 doutc(cl, "dn %p gets new offset %lld\n",
1711 req->r_old_dentry,
1712 ceph_dentry(req->r_old_dentry)->offset);
1713
1714 /* swap r_dentry and r_old_dentry in case that
1715 * splice_dentry() gets called later. This is safe
1716 * because no other place will use them */
1717 req->r_dentry = req->r_old_dentry;
1718 req->r_old_dentry = dn;
1719 dn = req->r_dentry;
1720 }
1721
1722 /* null dentry? */
1723 if (!rinfo->head->is_target) {
1724 doutc(cl, "null dentry\n");
1725 if (d_really_is_positive(dn)) {
1726 doutc(cl, "d_delete %p\n", dn);
1727 ceph_dir_clear_ordered(dir);
1728 d_delete(dn);
1729 } else if (have_lease) {
1730 if (d_unhashed(dn))
1731 d_add(dn, NULL);
1732 }
1733
1734 if (!d_unhashed(dn) && have_lease)
1735 update_dentry_lease(dir, dn,
1736 rinfo->dlease, session,
1737 req->r_request_started);
1738 goto done;
1739 }
1740
1741 /* attach proper inode */
1742 if (d_really_is_negative(dn)) {
1743 ceph_dir_clear_ordered(dir);
1744 ihold(in);
1745 err = splice_dentry(&req->r_dentry, in);
1746 if (err < 0)
1747 goto done;
1748 dn = req->r_dentry; /* may have spliced */
1749 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
1750 doutc(cl, " %p links to %p %llx.%llx, not %llx.%llx\n",
1751 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1752 ceph_vinop(in));
1753 d_invalidate(dn);
1754 have_lease = false;
1755 }
1756
1757 if (have_lease) {
1758 update_dentry_lease(dir, dn,
1759 rinfo->dlease, session,
1760 req->r_request_started);
1761 }
1762 doutc(cl, " final dn %p\n", dn);
1763 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1764 req->r_op == CEPH_MDS_OP_MKSNAP) &&
1765 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1766 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1767 struct inode *dir = req->r_parent;
1768
1769 /* fill out a snapdir LOOKUPSNAP dentry */
1770 BUG_ON(!dir);
1771 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
1772 BUG_ON(!req->r_dentry);
1773 doutc(cl, " linking snapped dir %p to dn %p\n", in,
1774 req->r_dentry);
1775 ceph_dir_clear_ordered(dir);
1776 ihold(in);
1777 err = splice_dentry(&req->r_dentry, in);
1778 if (err < 0)
1779 goto done;
1780 } else if (rinfo->head->is_dentry && req->r_dentry) {
1781 /* parent inode is not locked, be carefull */
1782 struct ceph_vino *ptvino = NULL;
1783 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1784 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1785 if (rinfo->head->is_target) {
1786 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1787 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1788 ptvino = &tvino;
1789 }
1790 update_dentry_lease_careful(req->r_dentry, rinfo->dlease,
1791 session, req->r_request_started,
1792 rinfo->dname, rinfo->dname_len,
1793 &dvino, ptvino);
1794 }
1795done:
1796 doutc(cl, "done err=%d\n", err);
1797 return err;
1798}
1799
1800/*
1801 * Prepopulate our cache with readdir results, leases, etc.
1802 */
1803static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1804 struct ceph_mds_session *session)
1805{
1806 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1807 struct ceph_client *cl = session->s_mdsc->fsc->client;
1808 int i, err = 0;
1809
1810 for (i = 0; i < rinfo->dir_nr; i++) {
1811 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1812 struct ceph_vino vino;
1813 struct inode *in;
1814 int rc;
1815
1816 vino.ino = le64_to_cpu(rde->inode.in->ino);
1817 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1818
1819 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL);
1820 if (IS_ERR(in)) {
1821 err = PTR_ERR(in);
1822 doutc(cl, "badness got %d\n", err);
1823 continue;
1824 }
1825 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
1826 -1, &req->r_caps_reservation);
1827 if (rc < 0) {
1828 pr_err_client(cl, "inode badness on %p got %d\n", in,
1829 rc);
1830 err = rc;
1831 if (in->i_state & I_NEW) {
1832 ihold(in);
1833 discard_new_inode(in);
1834 }
1835 } else if (in->i_state & I_NEW) {
1836 unlock_new_inode(in);
1837 }
1838
1839 iput(in);
1840 }
1841
1842 return err;
1843}
1844
1845void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1846{
1847 if (ctl->page) {
1848 kunmap(ctl->page);
1849 put_page(ctl->page);
1850 ctl->page = NULL;
1851 }
1852}
1853
1854static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1855 struct ceph_readdir_cache_control *ctl,
1856 struct ceph_mds_request *req)
1857{
1858 struct ceph_client *cl = ceph_inode_to_client(dir);
1859 struct ceph_inode_info *ci = ceph_inode(dir);
1860 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
1861 unsigned idx = ctl->index % nsize;
1862 pgoff_t pgoff = ctl->index / nsize;
1863
1864 if (!ctl->page || pgoff != page_index(ctl->page)) {
1865 ceph_readdir_cache_release(ctl);
1866 if (idx == 0)
1867 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1868 else
1869 ctl->page = find_lock_page(&dir->i_data, pgoff);
1870 if (!ctl->page) {
1871 ctl->index = -1;
1872 return idx == 0 ? -ENOMEM : 0;
1873 }
1874 /* reading/filling the cache are serialized by
1875 * i_rwsem, no need to use page lock */
1876 unlock_page(ctl->page);
1877 ctl->dentries = kmap(ctl->page);
1878 if (idx == 0)
1879 memset(ctl->dentries, 0, PAGE_SIZE);
1880 }
1881
1882 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1883 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1884 doutc(cl, "dn %p idx %d\n", dn, ctl->index);
1885 ctl->dentries[idx] = dn;
1886 ctl->index++;
1887 } else {
1888 doutc(cl, "disable readdir cache\n");
1889 ctl->index = -1;
1890 }
1891 return 0;
1892}
1893
1894int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1895 struct ceph_mds_session *session)
1896{
1897 struct dentry *parent = req->r_dentry;
1898 struct inode *inode = d_inode(parent);
1899 struct ceph_inode_info *ci = ceph_inode(inode);
1900 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1901 struct ceph_client *cl = session->s_mdsc->fsc->client;
1902 struct qstr dname;
1903 struct dentry *dn;
1904 struct inode *in;
1905 int err = 0, skipped = 0, ret, i;
1906 u32 frag = le32_to_cpu(req->r_args.readdir.frag);
1907 u32 last_hash = 0;
1908 u32 fpos_offset;
1909 struct ceph_readdir_cache_control cache_ctl = {};
1910
1911 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
1912 return readdir_prepopulate_inodes_only(req, session);
1913
1914 if (rinfo->hash_order) {
1915 if (req->r_path2) {
1916 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1917 req->r_path2,
1918 strlen(req->r_path2));
1919 last_hash = ceph_frag_value(last_hash);
1920 } else if (rinfo->offset_hash) {
1921 /* mds understands offset_hash */
1922 WARN_ON_ONCE(req->r_readdir_offset != 2);
1923 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash);
1924 }
1925 }
1926
1927 if (rinfo->dir_dir &&
1928 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1929 doutc(cl, "got new frag %x -> %x\n", frag,
1930 le32_to_cpu(rinfo->dir_dir->frag));
1931 frag = le32_to_cpu(rinfo->dir_dir->frag);
1932 if (!rinfo->hash_order)
1933 req->r_readdir_offset = 2;
1934 }
1935
1936 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1937 doutc(cl, "%d items under SNAPDIR dn %p\n",
1938 rinfo->dir_nr, parent);
1939 } else {
1940 doutc(cl, "%d items under dn %p\n", rinfo->dir_nr, parent);
1941 if (rinfo->dir_dir)
1942 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
1943
1944 if (ceph_frag_is_leftmost(frag) &&
1945 req->r_readdir_offset == 2 &&
1946 !(rinfo->hash_order && last_hash)) {
1947 /* note dir version at start of readdir so we can
1948 * tell if any dentries get dropped */
1949 req->r_dir_release_cnt =
1950 atomic64_read(&ci->i_release_count);
1951 req->r_dir_ordered_cnt =
1952 atomic64_read(&ci->i_ordered_count);
1953 req->r_readdir_cache_idx = 0;
1954 }
1955 }
1956
1957 cache_ctl.index = req->r_readdir_cache_idx;
1958 fpos_offset = req->r_readdir_offset;
1959
1960 /* FIXME: release caps/leases if error occurs */
1961 for (i = 0; i < rinfo->dir_nr; i++) {
1962 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1963 struct ceph_vino tvino;
1964
1965 dname.name = rde->name;
1966 dname.len = rde->name_len;
1967 dname.hash = full_name_hash(parent, dname.name, dname.len);
1968
1969 tvino.ino = le64_to_cpu(rde->inode.in->ino);
1970 tvino.snap = le64_to_cpu(rde->inode.in->snapid);
1971
1972 if (rinfo->hash_order) {
1973 u32 hash = ceph_frag_value(rde->raw_hash);
1974 if (hash != last_hash)
1975 fpos_offset = 2;
1976 last_hash = hash;
1977 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1978 } else {
1979 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1980 }
1981
1982retry_lookup:
1983 dn = d_lookup(parent, &dname);
1984 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n",
1985 parent, dname.len, dname.name, dn);
1986
1987 if (!dn) {
1988 dn = d_alloc(parent, &dname);
1989 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent,
1990 dname.len, dname.name, dn);
1991 if (!dn) {
1992 doutc(cl, "d_alloc badness\n");
1993 err = -ENOMEM;
1994 goto out;
1995 }
1996 if (rde->is_nokey) {
1997 spin_lock(&dn->d_lock);
1998 dn->d_flags |= DCACHE_NOKEY_NAME;
1999 spin_unlock(&dn->d_lock);
2000 }
2001 } else if (d_really_is_positive(dn) &&
2002 (ceph_ino(d_inode(dn)) != tvino.ino ||
2003 ceph_snap(d_inode(dn)) != tvino.snap)) {
2004 struct ceph_dentry_info *di = ceph_dentry(dn);
2005 doutc(cl, " dn %p points to wrong inode %p\n",
2006 dn, d_inode(dn));
2007
2008 spin_lock(&dn->d_lock);
2009 if (di->offset > 0 &&
2010 di->lease_shared_gen ==
2011 atomic_read(&ci->i_shared_gen)) {
2012 __ceph_dir_clear_ordered(ci);
2013 di->offset = 0;
2014 }
2015 spin_unlock(&dn->d_lock);
2016
2017 d_delete(dn);
2018 dput(dn);
2019 goto retry_lookup;
2020 }
2021
2022 /* inode */
2023 if (d_really_is_positive(dn)) {
2024 in = d_inode(dn);
2025 } else {
2026 in = ceph_get_inode(parent->d_sb, tvino, NULL);
2027 if (IS_ERR(in)) {
2028 doutc(cl, "new_inode badness\n");
2029 d_drop(dn);
2030 dput(dn);
2031 err = PTR_ERR(in);
2032 goto out;
2033 }
2034 }
2035
2036 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
2037 -1, &req->r_caps_reservation);
2038 if (ret < 0) {
2039 pr_err_client(cl, "badness on %p %llx.%llx\n", in,
2040 ceph_vinop(in));
2041 if (d_really_is_negative(dn)) {
2042 if (in->i_state & I_NEW) {
2043 ihold(in);
2044 discard_new_inode(in);
2045 }
2046 iput(in);
2047 }
2048 d_drop(dn);
2049 err = ret;
2050 goto next_item;
2051 }
2052 if (in->i_state & I_NEW)
2053 unlock_new_inode(in);
2054
2055 if (d_really_is_negative(dn)) {
2056 if (ceph_security_xattr_deadlock(in)) {
2057 doutc(cl, " skip splicing dn %p to inode %p"
2058 " (security xattr deadlock)\n", dn, in);
2059 iput(in);
2060 skipped++;
2061 goto next_item;
2062 }
2063
2064 err = splice_dentry(&dn, in);
2065 if (err < 0)
2066 goto next_item;
2067 }
2068
2069 ceph_dentry(dn)->offset = rde->offset;
2070
2071 update_dentry_lease(d_inode(parent), dn,
2072 rde->lease, req->r_session,
2073 req->r_request_started);
2074
2075 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
2076 ret = fill_readdir_cache(d_inode(parent), dn,
2077 &cache_ctl, req);
2078 if (ret < 0)
2079 err = ret;
2080 }
2081next_item:
2082 dput(dn);
2083 }
2084out:
2085 if (err == 0 && skipped == 0) {
2086 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
2087 req->r_readdir_cache_idx = cache_ctl.index;
2088 }
2089 ceph_readdir_cache_release(&cache_ctl);
2090 doutc(cl, "done\n");
2091 return err;
2092}
2093
2094bool ceph_inode_set_size(struct inode *inode, loff_t size)
2095{
2096 struct ceph_client *cl = ceph_inode_to_client(inode);
2097 struct ceph_inode_info *ci = ceph_inode(inode);
2098 bool ret;
2099
2100 spin_lock(&ci->i_ceph_lock);
2101 doutc(cl, "set_size %p %llu -> %llu\n", inode, i_size_read(inode), size);
2102 i_size_write(inode, size);
2103 ceph_fscache_update(inode);
2104 inode->i_blocks = calc_inode_blocks(size);
2105
2106 ret = __ceph_should_report_size(ci);
2107
2108 spin_unlock(&ci->i_ceph_lock);
2109
2110 return ret;
2111}
2112
2113void ceph_queue_inode_work(struct inode *inode, int work_bit)
2114{
2115 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
2116 struct ceph_client *cl = fsc->client;
2117 struct ceph_inode_info *ci = ceph_inode(inode);
2118 set_bit(work_bit, &ci->i_work_mask);
2119
2120 ihold(inode);
2121 if (queue_work(fsc->inode_wq, &ci->i_work)) {
2122 doutc(cl, "%p %llx.%llx mask=%lx\n", inode,
2123 ceph_vinop(inode), ci->i_work_mask);
2124 } else {
2125 doutc(cl, "%p %llx.%llx already queued, mask=%lx\n",
2126 inode, ceph_vinop(inode), ci->i_work_mask);
2127 iput(inode);
2128 }
2129}
2130
2131static void ceph_do_invalidate_pages(struct inode *inode)
2132{
2133 struct ceph_client *cl = ceph_inode_to_client(inode);
2134 struct ceph_inode_info *ci = ceph_inode(inode);
2135 u32 orig_gen;
2136 int check = 0;
2137
2138 ceph_fscache_invalidate(inode, false);
2139
2140 mutex_lock(&ci->i_truncate_mutex);
2141
2142 if (ceph_inode_is_shutdown(inode)) {
2143 pr_warn_ratelimited_client(cl,
2144 "%p %llx.%llx is shut down\n", inode,
2145 ceph_vinop(inode));
2146 mapping_set_error(inode->i_mapping, -EIO);
2147 truncate_pagecache(inode, 0);
2148 mutex_unlock(&ci->i_truncate_mutex);
2149 goto out;
2150 }
2151
2152 spin_lock(&ci->i_ceph_lock);
2153 doutc(cl, "%p %llx.%llx gen %d revoking %d\n", inode,
2154 ceph_vinop(inode), ci->i_rdcache_gen, ci->i_rdcache_revoking);
2155 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
2156 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
2157 check = 1;
2158 spin_unlock(&ci->i_ceph_lock);
2159 mutex_unlock(&ci->i_truncate_mutex);
2160 goto out;
2161 }
2162 orig_gen = ci->i_rdcache_gen;
2163 spin_unlock(&ci->i_ceph_lock);
2164
2165 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
2166 pr_err_client(cl, "invalidate_inode_pages2 %llx.%llx failed\n",
2167 ceph_vinop(inode));
2168 }
2169
2170 spin_lock(&ci->i_ceph_lock);
2171 if (orig_gen == ci->i_rdcache_gen &&
2172 orig_gen == ci->i_rdcache_revoking) {
2173 doutc(cl, "%p %llx.%llx gen %d successful\n", inode,
2174 ceph_vinop(inode), ci->i_rdcache_gen);
2175 ci->i_rdcache_revoking--;
2176 check = 1;
2177 } else {
2178 doutc(cl, "%p %llx.%llx gen %d raced, now %d revoking %d\n",
2179 inode, ceph_vinop(inode), orig_gen, ci->i_rdcache_gen,
2180 ci->i_rdcache_revoking);
2181 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
2182 check = 1;
2183 }
2184 spin_unlock(&ci->i_ceph_lock);
2185 mutex_unlock(&ci->i_truncate_mutex);
2186out:
2187 if (check)
2188 ceph_check_caps(ci, 0);
2189}
2190
2191/*
2192 * Make sure any pending truncation is applied before doing anything
2193 * that may depend on it.
2194 */
2195void __ceph_do_pending_vmtruncate(struct inode *inode)
2196{
2197 struct ceph_client *cl = ceph_inode_to_client(inode);
2198 struct ceph_inode_info *ci = ceph_inode(inode);
2199 u64 to;
2200 int wrbuffer_refs, finish = 0;
2201
2202 mutex_lock(&ci->i_truncate_mutex);
2203retry:
2204 spin_lock(&ci->i_ceph_lock);
2205 if (ci->i_truncate_pending == 0) {
2206 doutc(cl, "%p %llx.%llx none pending\n", inode,
2207 ceph_vinop(inode));
2208 spin_unlock(&ci->i_ceph_lock);
2209 mutex_unlock(&ci->i_truncate_mutex);
2210 return;
2211 }
2212
2213 /*
2214 * make sure any dirty snapped pages are flushed before we
2215 * possibly truncate them.. so write AND block!
2216 */
2217 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
2218 spin_unlock(&ci->i_ceph_lock);
2219 doutc(cl, "%p %llx.%llx flushing snaps first\n", inode,
2220 ceph_vinop(inode));
2221 filemap_write_and_wait_range(&inode->i_data, 0,
2222 inode->i_sb->s_maxbytes);
2223 goto retry;
2224 }
2225
2226 /* there should be no reader or writer */
2227 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
2228
2229 to = ci->i_truncate_pagecache_size;
2230 wrbuffer_refs = ci->i_wrbuffer_ref;
2231 doutc(cl, "%p %llx.%llx (%d) to %lld\n", inode, ceph_vinop(inode),
2232 ci->i_truncate_pending, to);
2233 spin_unlock(&ci->i_ceph_lock);
2234
2235 ceph_fscache_resize(inode, to);
2236 truncate_pagecache(inode, to);
2237
2238 spin_lock(&ci->i_ceph_lock);
2239 if (to == ci->i_truncate_pagecache_size) {
2240 ci->i_truncate_pending = 0;
2241 finish = 1;
2242 }
2243 spin_unlock(&ci->i_ceph_lock);
2244 if (!finish)
2245 goto retry;
2246
2247 mutex_unlock(&ci->i_truncate_mutex);
2248
2249 if (wrbuffer_refs == 0)
2250 ceph_check_caps(ci, 0);
2251
2252 wake_up_all(&ci->i_cap_wq);
2253}
2254
2255static void ceph_inode_work(struct work_struct *work)
2256{
2257 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
2258 i_work);
2259 struct inode *inode = &ci->netfs.inode;
2260 struct ceph_client *cl = ceph_inode_to_client(inode);
2261
2262 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) {
2263 doutc(cl, "writeback %p %llx.%llx\n", inode, ceph_vinop(inode));
2264 filemap_fdatawrite(&inode->i_data);
2265 }
2266 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask))
2267 ceph_do_invalidate_pages(inode);
2268
2269 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask))
2270 __ceph_do_pending_vmtruncate(inode);
2271
2272 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask))
2273 ceph_check_caps(ci, 0);
2274
2275 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask))
2276 ceph_flush_snaps(ci, NULL);
2277
2278 iput(inode);
2279}
2280
2281static const char *ceph_encrypted_get_link(struct dentry *dentry,
2282 struct inode *inode,
2283 struct delayed_call *done)
2284{
2285 struct ceph_inode_info *ci = ceph_inode(inode);
2286
2287 if (!dentry)
2288 return ERR_PTR(-ECHILD);
2289
2290 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode),
2291 done);
2292}
2293
2294static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap,
2295 const struct path *path,
2296 struct kstat *stat, u32 request_mask,
2297 unsigned int query_flags)
2298{
2299 int ret;
2300
2301 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags);
2302 if (ret)
2303 return ret;
2304 return fscrypt_symlink_getattr(path, stat);
2305}
2306
2307/*
2308 * symlinks
2309 */
2310static const struct inode_operations ceph_symlink_iops = {
2311 .get_link = simple_get_link,
2312 .setattr = ceph_setattr,
2313 .getattr = ceph_getattr,
2314 .listxattr = ceph_listxattr,
2315};
2316
2317static const struct inode_operations ceph_encrypted_symlink_iops = {
2318 .get_link = ceph_encrypted_get_link,
2319 .setattr = ceph_setattr,
2320 .getattr = ceph_encrypted_symlink_getattr,
2321 .listxattr = ceph_listxattr,
2322};
2323
2324/*
2325 * Transfer the encrypted last block to the MDS and the MDS
2326 * will help update it when truncating a smaller size.
2327 *
2328 * We don't support a PAGE_SIZE that is smaller than the
2329 * CEPH_FSCRYPT_BLOCK_SIZE.
2330 */
2331static int fill_fscrypt_truncate(struct inode *inode,
2332 struct ceph_mds_request *req,
2333 struct iattr *attr)
2334{
2335 struct ceph_client *cl = ceph_inode_to_client(inode);
2336 struct ceph_inode_info *ci = ceph_inode(inode);
2337 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE;
2338 loff_t pos, orig_pos = round_down(attr->ia_size,
2339 CEPH_FSCRYPT_BLOCK_SIZE);
2340 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT;
2341 struct ceph_pagelist *pagelist = NULL;
2342 struct kvec iov = {0};
2343 struct iov_iter iter;
2344 struct page *page = NULL;
2345 struct ceph_fscrypt_truncate_size_header header;
2346 int retry_op = 0;
2347 int len = CEPH_FSCRYPT_BLOCK_SIZE;
2348 loff_t i_size = i_size_read(inode);
2349 int got, ret, issued;
2350 u64 objver;
2351
2352 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got);
2353 if (ret < 0)
2354 return ret;
2355
2356 issued = __ceph_caps_issued(ci, NULL);
2357
2358 doutc(cl, "size %lld -> %lld got cap refs on %s, issued %s\n",
2359 i_size, attr->ia_size, ceph_cap_string(got),
2360 ceph_cap_string(issued));
2361
2362 /* Try to writeback the dirty pagecaches */
2363 if (issued & (CEPH_CAP_FILE_BUFFER)) {
2364 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1;
2365
2366 ret = filemap_write_and_wait_range(inode->i_mapping,
2367 orig_pos, lend);
2368 if (ret < 0)
2369 goto out;
2370 }
2371
2372 page = __page_cache_alloc(GFP_KERNEL);
2373 if (page == NULL) {
2374 ret = -ENOMEM;
2375 goto out;
2376 }
2377
2378 pagelist = ceph_pagelist_alloc(GFP_KERNEL);
2379 if (!pagelist) {
2380 ret = -ENOMEM;
2381 goto out;
2382 }
2383
2384 iov.iov_base = kmap_local_page(page);
2385 iov.iov_len = len;
2386 iov_iter_kvec(&iter, READ, &iov, 1, len);
2387
2388 pos = orig_pos;
2389 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver);
2390 if (ret < 0)
2391 goto out;
2392
2393 /* Insert the header first */
2394 header.ver = 1;
2395 header.compat = 1;
2396 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode));
2397
2398 /*
2399 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE,
2400 * because in MDS it may need this to do the truncate.
2401 */
2402 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE);
2403
2404 /*
2405 * If we hit a hole here, we should just skip filling
2406 * the fscrypt for the request, because once the fscrypt
2407 * is enabled, the file will be split into many blocks
2408 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there
2409 * has a hole, the hole size should be multiple of block
2410 * size.
2411 *
2412 * If the Rados object doesn't exist, it will be set to 0.
2413 */
2414 if (!objver) {
2415 doutc(cl, "hit hole, ppos %lld < size %lld\n", pos, i_size);
2416
2417 header.data_len = cpu_to_le32(8 + 8 + 4);
2418 header.file_offset = 0;
2419 ret = 0;
2420 } else {
2421 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE);
2422 header.file_offset = cpu_to_le64(orig_pos);
2423
2424 doutc(cl, "encrypt block boff/bsize %d/%lu\n", boff,
2425 CEPH_FSCRYPT_BLOCK_SIZE);
2426
2427 /* truncate and zero out the extra contents for the last block */
2428 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff);
2429
2430 /* encrypt the last block */
2431 ret = ceph_fscrypt_encrypt_block_inplace(inode, page,
2432 CEPH_FSCRYPT_BLOCK_SIZE,
2433 0, block,
2434 GFP_KERNEL);
2435 if (ret)
2436 goto out;
2437 }
2438
2439 /* Insert the header */
2440 ret = ceph_pagelist_append(pagelist, &header, sizeof(header));
2441 if (ret)
2442 goto out;
2443
2444 if (header.block_size) {
2445 /* Append the last block contents to pagelist */
2446 ret = ceph_pagelist_append(pagelist, iov.iov_base,
2447 CEPH_FSCRYPT_BLOCK_SIZE);
2448 if (ret)
2449 goto out;
2450 }
2451 req->r_pagelist = pagelist;
2452out:
2453 doutc(cl, "%p %llx.%llx size dropping cap refs on %s\n", inode,
2454 ceph_vinop(inode), ceph_cap_string(got));
2455 ceph_put_cap_refs(ci, got);
2456 if (iov.iov_base)
2457 kunmap_local(iov.iov_base);
2458 if (page)
2459 __free_pages(page, 0);
2460 if (ret && pagelist)
2461 ceph_pagelist_release(pagelist);
2462 return ret;
2463}
2464
2465int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode,
2466 struct iattr *attr, struct ceph_iattr *cia)
2467{
2468 struct ceph_inode_info *ci = ceph_inode(inode);
2469 unsigned int ia_valid = attr->ia_valid;
2470 struct ceph_mds_request *req;
2471 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc;
2472 struct ceph_client *cl = ceph_inode_to_client(inode);
2473 struct ceph_cap_flush *prealloc_cf;
2474 loff_t isize = i_size_read(inode);
2475 int issued;
2476 int release = 0, dirtied = 0;
2477 int mask = 0;
2478 int err = 0;
2479 int inode_dirty_flags = 0;
2480 bool lock_snap_rwsem = false;
2481 bool fill_fscrypt;
2482 int truncate_retry = 20; /* The RMW will take around 50ms */
2483
2484retry:
2485 prealloc_cf = ceph_alloc_cap_flush();
2486 if (!prealloc_cf)
2487 return -ENOMEM;
2488
2489 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
2490 USE_AUTH_MDS);
2491 if (IS_ERR(req)) {
2492 ceph_free_cap_flush(prealloc_cf);
2493 return PTR_ERR(req);
2494 }
2495
2496 fill_fscrypt = false;
2497 spin_lock(&ci->i_ceph_lock);
2498 issued = __ceph_caps_issued(ci, NULL);
2499
2500 if (!ci->i_head_snapc &&
2501 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
2502 lock_snap_rwsem = true;
2503 if (!down_read_trylock(&mdsc->snap_rwsem)) {
2504 spin_unlock(&ci->i_ceph_lock);
2505 down_read(&mdsc->snap_rwsem);
2506 spin_lock(&ci->i_ceph_lock);
2507 issued = __ceph_caps_issued(ci, NULL);
2508 }
2509 }
2510
2511 doutc(cl, "%p %llx.%llx issued %s\n", inode, ceph_vinop(inode),
2512 ceph_cap_string(issued));
2513#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
2514 if (cia && cia->fscrypt_auth) {
2515 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth);
2516
2517 if (len > sizeof(*cia->fscrypt_auth)) {
2518 err = -EINVAL;
2519 spin_unlock(&ci->i_ceph_lock);
2520 goto out;
2521 }
2522
2523 doutc(cl, "%p %llx.%llx fscrypt_auth len %u to %u)\n", inode,
2524 ceph_vinop(inode), ci->fscrypt_auth_len, len);
2525
2526 /* It should never be re-set once set */
2527 WARN_ON_ONCE(ci->fscrypt_auth);
2528
2529 if (issued & CEPH_CAP_AUTH_EXCL) {
2530 dirtied |= CEPH_CAP_AUTH_EXCL;
2531 kfree(ci->fscrypt_auth);
2532 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth;
2533 ci->fscrypt_auth_len = len;
2534 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2535 ci->fscrypt_auth_len != len ||
2536 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) {
2537 req->r_fscrypt_auth = cia->fscrypt_auth;
2538 mask |= CEPH_SETATTR_FSCRYPT_AUTH;
2539 release |= CEPH_CAP_AUTH_SHARED;
2540 }
2541 cia->fscrypt_auth = NULL;
2542 }
2543#else
2544 if (cia && cia->fscrypt_auth) {
2545 err = -EINVAL;
2546 spin_unlock(&ci->i_ceph_lock);
2547 goto out;
2548 }
2549#endif /* CONFIG_FS_ENCRYPTION */
2550
2551 if (ia_valid & ATTR_UID) {
2552 kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid);
2553
2554 doutc(cl, "%p %llx.%llx uid %d -> %d\n", inode,
2555 ceph_vinop(inode),
2556 from_kuid(&init_user_ns, inode->i_uid),
2557 from_kuid(&init_user_ns, attr->ia_uid));
2558 if (issued & CEPH_CAP_AUTH_EXCL) {
2559 inode->i_uid = fsuid;
2560 dirtied |= CEPH_CAP_AUTH_EXCL;
2561 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2562 !uid_eq(fsuid, inode->i_uid)) {
2563 req->r_args.setattr.uid = cpu_to_le32(
2564 from_kuid(&init_user_ns, fsuid));
2565 mask |= CEPH_SETATTR_UID;
2566 release |= CEPH_CAP_AUTH_SHARED;
2567 }
2568 }
2569 if (ia_valid & ATTR_GID) {
2570 kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid);
2571
2572 doutc(cl, "%p %llx.%llx gid %d -> %d\n", inode,
2573 ceph_vinop(inode),
2574 from_kgid(&init_user_ns, inode->i_gid),
2575 from_kgid(&init_user_ns, attr->ia_gid));
2576 if (issued & CEPH_CAP_AUTH_EXCL) {
2577 inode->i_gid = fsgid;
2578 dirtied |= CEPH_CAP_AUTH_EXCL;
2579 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2580 !gid_eq(fsgid, inode->i_gid)) {
2581 req->r_args.setattr.gid = cpu_to_le32(
2582 from_kgid(&init_user_ns, fsgid));
2583 mask |= CEPH_SETATTR_GID;
2584 release |= CEPH_CAP_AUTH_SHARED;
2585 }
2586 }
2587 if (ia_valid & ATTR_MODE) {
2588 doutc(cl, "%p %llx.%llx mode 0%o -> 0%o\n", inode,
2589 ceph_vinop(inode), inode->i_mode, attr->ia_mode);
2590 if (issued & CEPH_CAP_AUTH_EXCL) {
2591 inode->i_mode = attr->ia_mode;
2592 dirtied |= CEPH_CAP_AUTH_EXCL;
2593 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2594 attr->ia_mode != inode->i_mode) {
2595 inode->i_mode = attr->ia_mode;
2596 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
2597 mask |= CEPH_SETATTR_MODE;
2598 release |= CEPH_CAP_AUTH_SHARED;
2599 }
2600 }
2601
2602 if (ia_valid & ATTR_ATIME) {
2603 struct timespec64 atime = inode_get_atime(inode);
2604
2605 doutc(cl, "%p %llx.%llx atime %lld.%09ld -> %lld.%09ld\n",
2606 inode, ceph_vinop(inode),
2607 atime.tv_sec, atime.tv_nsec,
2608 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
2609 if (issued & CEPH_CAP_FILE_EXCL) {
2610 ci->i_time_warp_seq++;
2611 inode_set_atime_to_ts(inode, attr->ia_atime);
2612 dirtied |= CEPH_CAP_FILE_EXCL;
2613 } else if ((issued & CEPH_CAP_FILE_WR) &&
2614 timespec64_compare(&atime,
2615 &attr->ia_atime) < 0) {
2616 inode_set_atime_to_ts(inode, attr->ia_atime);
2617 dirtied |= CEPH_CAP_FILE_WR;
2618 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2619 !timespec64_equal(&atime, &attr->ia_atime)) {
2620 ceph_encode_timespec64(&req->r_args.setattr.atime,
2621 &attr->ia_atime);
2622 mask |= CEPH_SETATTR_ATIME;
2623 release |= CEPH_CAP_FILE_SHARED |
2624 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2625 }
2626 }
2627 if (ia_valid & ATTR_SIZE) {
2628 doutc(cl, "%p %llx.%llx size %lld -> %lld\n", inode,
2629 ceph_vinop(inode), isize, attr->ia_size);
2630 /*
2631 * Only when the new size is smaller and not aligned to
2632 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed.
2633 */
2634 if (IS_ENCRYPTED(inode) && attr->ia_size < isize &&
2635 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) {
2636 mask |= CEPH_SETATTR_SIZE;
2637 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2638 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2639 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags);
2640 mask |= CEPH_SETATTR_FSCRYPT_FILE;
2641 req->r_args.setattr.size =
2642 cpu_to_le64(round_up(attr->ia_size,
2643 CEPH_FSCRYPT_BLOCK_SIZE));
2644 req->r_args.setattr.old_size =
2645 cpu_to_le64(round_up(isize,
2646 CEPH_FSCRYPT_BLOCK_SIZE));
2647 req->r_fscrypt_file = attr->ia_size;
2648 fill_fscrypt = true;
2649 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) {
2650 if (attr->ia_size > isize) {
2651 i_size_write(inode, attr->ia_size);
2652 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2653 ci->i_reported_size = attr->ia_size;
2654 dirtied |= CEPH_CAP_FILE_EXCL;
2655 ia_valid |= ATTR_MTIME;
2656 }
2657 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2658 attr->ia_size != isize) {
2659 mask |= CEPH_SETATTR_SIZE;
2660 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2661 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2662 if (IS_ENCRYPTED(inode) && attr->ia_size) {
2663 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags);
2664 mask |= CEPH_SETATTR_FSCRYPT_FILE;
2665 req->r_args.setattr.size =
2666 cpu_to_le64(round_up(attr->ia_size,
2667 CEPH_FSCRYPT_BLOCK_SIZE));
2668 req->r_args.setattr.old_size =
2669 cpu_to_le64(round_up(isize,
2670 CEPH_FSCRYPT_BLOCK_SIZE));
2671 req->r_fscrypt_file = attr->ia_size;
2672 } else {
2673 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2674 req->r_args.setattr.old_size = cpu_to_le64(isize);
2675 req->r_fscrypt_file = 0;
2676 }
2677 }
2678 }
2679 if (ia_valid & ATTR_MTIME) {
2680 struct timespec64 mtime = inode_get_mtime(inode);
2681
2682 doutc(cl, "%p %llx.%llx mtime %lld.%09ld -> %lld.%09ld\n",
2683 inode, ceph_vinop(inode),
2684 mtime.tv_sec, mtime.tv_nsec,
2685 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
2686 if (issued & CEPH_CAP_FILE_EXCL) {
2687 ci->i_time_warp_seq++;
2688 inode_set_mtime_to_ts(inode, attr->ia_mtime);
2689 dirtied |= CEPH_CAP_FILE_EXCL;
2690 } else if ((issued & CEPH_CAP_FILE_WR) &&
2691 timespec64_compare(&mtime, &attr->ia_mtime) < 0) {
2692 inode_set_mtime_to_ts(inode, attr->ia_mtime);
2693 dirtied |= CEPH_CAP_FILE_WR;
2694 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2695 !timespec64_equal(&mtime, &attr->ia_mtime)) {
2696 ceph_encode_timespec64(&req->r_args.setattr.mtime,
2697 &attr->ia_mtime);
2698 mask |= CEPH_SETATTR_MTIME;
2699 release |= CEPH_CAP_FILE_SHARED |
2700 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2701 }
2702 }
2703
2704 /* these do nothing */
2705 if (ia_valid & ATTR_CTIME) {
2706 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2707 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
2708 doutc(cl, "%p %llx.%llx ctime %lld.%09ld -> %lld.%09ld (%s)\n",
2709 inode, ceph_vinop(inode),
2710 inode_get_ctime_sec(inode),
2711 inode_get_ctime_nsec(inode),
2712 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2713 only ? "ctime only" : "ignored");
2714 if (only) {
2715 /*
2716 * if kernel wants to dirty ctime but nothing else,
2717 * we need to choose a cap to dirty under, or do
2718 * a almost-no-op setattr
2719 */
2720 if (issued & CEPH_CAP_AUTH_EXCL)
2721 dirtied |= CEPH_CAP_AUTH_EXCL;
2722 else if (issued & CEPH_CAP_FILE_EXCL)
2723 dirtied |= CEPH_CAP_FILE_EXCL;
2724 else if (issued & CEPH_CAP_XATTR_EXCL)
2725 dirtied |= CEPH_CAP_XATTR_EXCL;
2726 else
2727 mask |= CEPH_SETATTR_CTIME;
2728 }
2729 }
2730 if (ia_valid & ATTR_FILE)
2731 doutc(cl, "%p %llx.%llx ATTR_FILE ... hrm!\n", inode,
2732 ceph_vinop(inode));
2733
2734 if (dirtied) {
2735 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2736 &prealloc_cf);
2737 inode_set_ctime_to_ts(inode, attr->ia_ctime);
2738 inode_inc_iversion_raw(inode);
2739 }
2740
2741 release &= issued;
2742 spin_unlock(&ci->i_ceph_lock);
2743 if (lock_snap_rwsem) {
2744 up_read(&mdsc->snap_rwsem);
2745 lock_snap_rwsem = false;
2746 }
2747
2748 if (inode_dirty_flags)
2749 __mark_inode_dirty(inode, inode_dirty_flags);
2750
2751 if (mask) {
2752 req->r_inode = inode;
2753 ihold(inode);
2754 req->r_inode_drop = release;
2755 req->r_args.setattr.mask = cpu_to_le32(mask);
2756 req->r_num_caps = 1;
2757 req->r_stamp = attr->ia_ctime;
2758 if (fill_fscrypt) {
2759 err = fill_fscrypt_truncate(inode, req, attr);
2760 if (err)
2761 goto out;
2762 }
2763
2764 /*
2765 * The truncate request will return -EAGAIN when the
2766 * last block has been updated just before the MDS
2767 * successfully gets the xlock for the FILE lock. To
2768 * avoid corrupting the file contents we need to retry
2769 * it.
2770 */
2771 err = ceph_mdsc_do_request(mdsc, NULL, req);
2772 if (err == -EAGAIN && truncate_retry--) {
2773 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote), retry it!\n",
2774 inode, ceph_vinop(inode), err,
2775 ceph_cap_string(dirtied), mask);
2776 ceph_mdsc_put_request(req);
2777 ceph_free_cap_flush(prealloc_cf);
2778 goto retry;
2779 }
2780 }
2781out:
2782 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote)\n", inode,
2783 ceph_vinop(inode), err, ceph_cap_string(dirtied), mask);
2784
2785 ceph_mdsc_put_request(req);
2786 ceph_free_cap_flush(prealloc_cf);
2787
2788 if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
2789 __ceph_do_pending_vmtruncate(inode);
2790
2791 return err;
2792}
2793
2794/*
2795 * setattr
2796 */
2797int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
2798 struct iattr *attr)
2799{
2800 struct inode *inode = d_inode(dentry);
2801 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
2802 int err;
2803
2804 if (ceph_snap(inode) != CEPH_NOSNAP)
2805 return -EROFS;
2806
2807 if (ceph_inode_is_shutdown(inode))
2808 return -ESTALE;
2809
2810 err = fscrypt_prepare_setattr(dentry, attr);
2811 if (err)
2812 return err;
2813
2814 err = setattr_prepare(idmap, dentry, attr);
2815 if (err != 0)
2816 return err;
2817
2818 if ((attr->ia_valid & ATTR_SIZE) &&
2819 attr->ia_size > max(i_size_read(inode), fsc->max_file_size))
2820 return -EFBIG;
2821
2822 if ((attr->ia_valid & ATTR_SIZE) &&
2823 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size))
2824 return -EDQUOT;
2825
2826 err = __ceph_setattr(idmap, inode, attr, NULL);
2827
2828 if (err >= 0 && (attr->ia_valid & ATTR_MODE))
2829 err = posix_acl_chmod(idmap, dentry, attr->ia_mode);
2830
2831 return err;
2832}
2833
2834int ceph_try_to_choose_auth_mds(struct inode *inode, int mask)
2835{
2836 int issued = ceph_caps_issued(ceph_inode(inode));
2837
2838 /*
2839 * If any 'x' caps is issued we can just choose the auth MDS
2840 * instead of the random replica MDSes. Because only when the
2841 * Locker is in LOCK_EXEC state will the loner client could
2842 * get the 'x' caps. And if we send the getattr requests to
2843 * any replica MDS it must auth pin and tries to rdlock from
2844 * the auth MDS, and then the auth MDS need to do the Locker
2845 * state transition to LOCK_SYNC. And after that the lock state
2846 * will change back.
2847 *
2848 * This cost much when doing the Locker state transition and
2849 * usually will need to revoke caps from clients.
2850 *
2851 * And for the 'Xs' caps for getxattr we will also choose the
2852 * auth MDS, because the MDS side code is buggy due to setxattr
2853 * won't notify the replica MDSes when the values changed and
2854 * the replica MDS will return the old values. Though we will
2855 * fix it in MDS code, but this still makes sense for old ceph.
2856 */
2857 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL))
2858 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR)))
2859 return USE_AUTH_MDS;
2860 else
2861 return USE_ANY_MDS;
2862}
2863
2864/*
2865 * Verify that we have a lease on the given mask. If not,
2866 * do a getattr against an mds.
2867 */
2868int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2869 int mask, bool force)
2870{
2871 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb);
2872 struct ceph_client *cl = fsc->client;
2873 struct ceph_mds_client *mdsc = fsc->mdsc;
2874 struct ceph_mds_request *req;
2875 int mode;
2876 int err;
2877
2878 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2879 doutc(cl, "inode %p %llx.%llx SNAPDIR\n", inode,
2880 ceph_vinop(inode));
2881 return 0;
2882 }
2883
2884 doutc(cl, "inode %p %llx.%llx mask %s mode 0%o\n", inode,
2885 ceph_vinop(inode), ceph_cap_string(mask), inode->i_mode);
2886 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1))
2887 return 0;
2888
2889 mode = ceph_try_to_choose_auth_mds(inode, mask);
2890 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode);
2891 if (IS_ERR(req))
2892 return PTR_ERR(req);
2893 req->r_inode = inode;
2894 ihold(inode);
2895 req->r_num_caps = 1;
2896 req->r_args.getattr.mask = cpu_to_le32(mask);
2897 req->r_locked_page = locked_page;
2898 err = ceph_mdsc_do_request(mdsc, NULL, req);
2899 if (locked_page && err == 0) {
2900 u64 inline_version = req->r_reply_info.targeti.inline_version;
2901 if (inline_version == 0) {
2902 /* the reply is supposed to contain inline data */
2903 err = -EINVAL;
2904 } else if (inline_version == CEPH_INLINE_NONE ||
2905 inline_version == 1) {
2906 err = -ENODATA;
2907 } else {
2908 err = req->r_reply_info.targeti.inline_len;
2909 }
2910 }
2911 ceph_mdsc_put_request(req);
2912 doutc(cl, "result=%d\n", err);
2913 return err;
2914}
2915
2916int ceph_do_getvxattr(struct inode *inode, const char *name, void *value,
2917 size_t size)
2918{
2919 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb);
2920 struct ceph_client *cl = fsc->client;
2921 struct ceph_mds_client *mdsc = fsc->mdsc;
2922 struct ceph_mds_request *req;
2923 int mode = USE_AUTH_MDS;
2924 int err;
2925 char *xattr_value;
2926 size_t xattr_value_len;
2927
2928 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode);
2929 if (IS_ERR(req)) {
2930 err = -ENOMEM;
2931 goto out;
2932 }
2933
2934 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR;
2935 req->r_path2 = kstrdup(name, GFP_NOFS);
2936 if (!req->r_path2) {
2937 err = -ENOMEM;
2938 goto put;
2939 }
2940
2941 ihold(inode);
2942 req->r_inode = inode;
2943 err = ceph_mdsc_do_request(mdsc, NULL, req);
2944 if (err < 0)
2945 goto put;
2946
2947 xattr_value = req->r_reply_info.xattr_info.xattr_value;
2948 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len;
2949
2950 doutc(cl, "xattr_value_len:%zu, size:%zu\n", xattr_value_len, size);
2951
2952 err = (int)xattr_value_len;
2953 if (size == 0)
2954 goto put;
2955
2956 if (xattr_value_len > size) {
2957 err = -ERANGE;
2958 goto put;
2959 }
2960
2961 memcpy(value, xattr_value, xattr_value_len);
2962put:
2963 ceph_mdsc_put_request(req);
2964out:
2965 doutc(cl, "result=%d\n", err);
2966 return err;
2967}
2968
2969
2970/*
2971 * Check inode permissions. We verify we have a valid value for
2972 * the AUTH cap, then call the generic handler.
2973 */
2974int ceph_permission(struct mnt_idmap *idmap, struct inode *inode,
2975 int mask)
2976{
2977 int err;
2978
2979 if (mask & MAY_NOT_BLOCK)
2980 return -ECHILD;
2981
2982 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
2983
2984 if (!err)
2985 err = generic_permission(idmap, inode, mask);
2986 return err;
2987}
2988
2989/* Craft a mask of needed caps given a set of requested statx attrs. */
2990static int statx_to_caps(u32 want, umode_t mode)
2991{
2992 int mask = 0;
2993
2994 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE))
2995 mask |= CEPH_CAP_AUTH_SHARED;
2996
2997 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) {
2998 /*
2999 * The link count for directories depends on inode->i_subdirs,
3000 * and that is only updated when Fs caps are held.
3001 */
3002 if (S_ISDIR(mode))
3003 mask |= CEPH_CAP_FILE_SHARED;
3004 else
3005 mask |= CEPH_CAP_LINK_SHARED;
3006 }
3007
3008 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE))
3009 mask |= CEPH_CAP_FILE_SHARED;
3010
3011 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE))
3012 mask |= CEPH_CAP_XATTR_SHARED;
3013
3014 return mask;
3015}
3016
3017/*
3018 * Get all the attributes. If we have sufficient caps for the requested attrs,
3019 * then we can avoid talking to the MDS at all.
3020 */
3021int ceph_getattr(struct mnt_idmap *idmap, const struct path *path,
3022 struct kstat *stat, u32 request_mask, unsigned int flags)
3023{
3024 struct inode *inode = d_inode(path->dentry);
3025 struct super_block *sb = inode->i_sb;
3026 struct ceph_inode_info *ci = ceph_inode(inode);
3027 u32 valid_mask = STATX_BASIC_STATS;
3028 int err = 0;
3029
3030 if (ceph_inode_is_shutdown(inode))
3031 return -ESTALE;
3032
3033 /* Skip the getattr altogether if we're asked not to sync */
3034 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) {
3035 err = ceph_do_getattr(inode,
3036 statx_to_caps(request_mask, inode->i_mode),
3037 flags & AT_STATX_FORCE_SYNC);
3038 if (err)
3039 return err;
3040 }
3041
3042 generic_fillattr(idmap, request_mask, inode, stat);
3043 stat->ino = ceph_present_inode(inode);
3044
3045 /*
3046 * btime on newly-allocated inodes is 0, so if this is still set to
3047 * that, then assume that it's not valid.
3048 */
3049 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) {
3050 stat->btime = ci->i_btime;
3051 valid_mask |= STATX_BTIME;
3052 }
3053
3054 if (request_mask & STATX_CHANGE_COOKIE) {
3055 stat->change_cookie = inode_peek_iversion_raw(inode);
3056 valid_mask |= STATX_CHANGE_COOKIE;
3057 }
3058
3059 if (ceph_snap(inode) == CEPH_NOSNAP)
3060 stat->dev = sb->s_dev;
3061 else
3062 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0;
3063
3064 if (S_ISDIR(inode->i_mode)) {
3065 if (ceph_test_mount_opt(ceph_sb_to_fs_client(sb), RBYTES)) {
3066 stat->size = ci->i_rbytes;
3067 } else if (ceph_snap(inode) == CEPH_SNAPDIR) {
3068 struct ceph_inode_info *pci;
3069 struct ceph_snap_realm *realm;
3070 struct inode *parent;
3071
3072 parent = ceph_lookup_inode(sb, ceph_ino(inode));
3073 if (IS_ERR(parent))
3074 return PTR_ERR(parent);
3075
3076 pci = ceph_inode(parent);
3077 spin_lock(&pci->i_ceph_lock);
3078 realm = pci->i_snap_realm;
3079 if (realm)
3080 stat->size = realm->num_snaps;
3081 else
3082 stat->size = 0;
3083 spin_unlock(&pci->i_ceph_lock);
3084 iput(parent);
3085 } else {
3086 stat->size = ci->i_files + ci->i_subdirs;
3087 }
3088 stat->blocks = 0;
3089 stat->blksize = 65536;
3090 /*
3091 * Some applications rely on the number of st_nlink
3092 * value on directories to be either 0 (if unlinked)
3093 * or 2 + number of subdirectories.
3094 */
3095 if (stat->nlink == 1)
3096 /* '.' + '..' + subdirs */
3097 stat->nlink = 1 + 1 + ci->i_subdirs;
3098 }
3099
3100 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC;
3101 if (IS_ENCRYPTED(inode))
3102 stat->attributes |= STATX_ATTR_ENCRYPTED;
3103 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC |
3104 STATX_ATTR_ENCRYPTED);
3105
3106 stat->result_mask = request_mask & valid_mask;
3107 return err;
3108}
3109
3110void ceph_inode_shutdown(struct inode *inode)
3111{
3112 struct ceph_inode_info *ci = ceph_inode(inode);
3113 struct rb_node *p;
3114 int iputs = 0;
3115 bool invalidate = false;
3116
3117 spin_lock(&ci->i_ceph_lock);
3118 ci->i_ceph_flags |= CEPH_I_SHUTDOWN;
3119 p = rb_first(&ci->i_caps);
3120 while (p) {
3121 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node);
3122
3123 p = rb_next(p);
3124 iputs += ceph_purge_inode_cap(inode, cap, &invalidate);
3125 }
3126 spin_unlock(&ci->i_ceph_lock);
3127
3128 if (invalidate)
3129 ceph_queue_invalidate(inode);
3130 while (iputs--)
3131 iput(inode);
3132}