1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
4 #include <linux/module.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>
19 #include "mds_client.h"
21 #include <linux/ceph/decode.h>
24 * Ceph inode operations
26 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
27 * setattr, etc.), xattr helpers, and helpers for assimilating
28 * metadata returned by the MDS into our cache.
30 * Also define helpers for doing asynchronous writeback, invalidation,
31 * and truncation for the benefit of those who can't afford to block
32 * (typically because they are in the message handler path).
35 static const struct inode_operations ceph_symlink_iops;
37 static void ceph_inode_work(struct work_struct *work);
40 * find or create an inode, given the ceph ino number
42 static int ceph_set_ino_cb(struct inode *inode, void *data)
44 struct ceph_inode_info *ci = ceph_inode(inode);
45 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
47 ci->i_vino = *(struct ceph_vino *)data;
48 inode->i_ino = ceph_vino_to_ino_t(ci->i_vino);
49 inode_set_iversion_raw(inode, 0);
50 percpu_counter_inc(&mdsc->metric.total_inodes);
55 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
59 if (ceph_vino_is_reserved(vino))
60 return ERR_PTR(-EREMOTEIO);
62 inode = iget5_locked(sb, (unsigned long)vino.ino, ceph_ino_compare,
63 ceph_set_ino_cb, &vino);
65 return ERR_PTR(-ENOMEM);
67 dout("get_inode on %llu=%llx.%llx got %p new %d\n", ceph_present_inode(inode),
68 ceph_vinop(inode), inode, !!(inode->i_state & I_NEW));
73 * get/constuct snapdir inode for a given directory
75 struct inode *ceph_get_snapdir(struct inode *parent)
77 struct ceph_vino vino = {
78 .ino = ceph_ino(parent),
81 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
82 struct ceph_inode_info *ci = ceph_inode(inode);
84 BUG_ON(!S_ISDIR(parent->i_mode));
87 inode->i_mode = parent->i_mode;
88 inode->i_uid = parent->i_uid;
89 inode->i_gid = parent->i_gid;
90 inode->i_mtime = parent->i_mtime;
91 inode->i_ctime = parent->i_ctime;
92 inode->i_atime = parent->i_atime;
94 ci->i_btime = ceph_inode(parent)->i_btime;
96 if (inode->i_state & I_NEW) {
97 inode->i_op = &ceph_snapdir_iops;
98 inode->i_fop = &ceph_snapdir_fops;
99 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
100 unlock_new_inode(inode);
106 const struct inode_operations ceph_file_iops = {
107 .permission = ceph_permission,
108 .setattr = ceph_setattr,
109 .getattr = ceph_getattr,
110 .listxattr = ceph_listxattr,
111 .get_acl = ceph_get_acl,
112 .set_acl = ceph_set_acl,
117 * We use a 'frag tree' to keep track of the MDS's directory fragments
118 * for a given inode (usually there is just a single fragment). We
119 * need to know when a child frag is delegated to a new MDS, or when
120 * it is flagged as replicated, so we can direct our requests
125 * find/create a frag in the tree
127 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
131 struct rb_node *parent = NULL;
132 struct ceph_inode_frag *frag;
135 p = &ci->i_fragtree.rb_node;
138 frag = rb_entry(parent, struct ceph_inode_frag, node);
139 c = ceph_frag_compare(f, frag->frag);
148 frag = kmalloc(sizeof(*frag), GFP_NOFS);
150 return ERR_PTR(-ENOMEM);
157 rb_link_node(&frag->node, parent, p);
158 rb_insert_color(&frag->node, &ci->i_fragtree);
160 dout("get_or_create_frag added %llx.%llx frag %x\n",
161 ceph_vinop(&ci->vfs_inode), f);
166 * find a specific frag @f
168 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
170 struct rb_node *n = ci->i_fragtree.rb_node;
173 struct ceph_inode_frag *frag =
174 rb_entry(n, struct ceph_inode_frag, node);
175 int c = ceph_frag_compare(f, frag->frag);
187 * Choose frag containing the given value @v. If @pfrag is
188 * specified, copy the frag delegation info to the caller if
191 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
192 struct ceph_inode_frag *pfrag, int *found)
194 u32 t = ceph_frag_make(0, 0);
195 struct ceph_inode_frag *frag;
203 WARN_ON(!ceph_frag_contains_value(t, v));
204 frag = __ceph_find_frag(ci, t);
206 break; /* t is a leaf */
207 if (frag->split_by == 0) {
209 memcpy(pfrag, frag, sizeof(*pfrag));
216 nway = 1 << frag->split_by;
217 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
218 frag->split_by, nway);
219 for (i = 0; i < nway; i++) {
220 n = ceph_frag_make_child(t, frag->split_by, i);
221 if (ceph_frag_contains_value(n, v)) {
228 dout("choose_frag(%x) = %x\n", v, t);
233 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
234 struct ceph_inode_frag *pfrag, int *found)
237 mutex_lock(&ci->i_fragtree_mutex);
238 ret = __ceph_choose_frag(ci, v, pfrag, found);
239 mutex_unlock(&ci->i_fragtree_mutex);
244 * Process dirfrag (delegation) info from the mds. Include leaf
245 * fragment in tree ONLY if ndist > 0. Otherwise, only
246 * branches/splits are included in i_fragtree)
248 static int ceph_fill_dirfrag(struct inode *inode,
249 struct ceph_mds_reply_dirfrag *dirinfo)
251 struct ceph_inode_info *ci = ceph_inode(inode);
252 struct ceph_inode_frag *frag;
253 u32 id = le32_to_cpu(dirinfo->frag);
254 int mds = le32_to_cpu(dirinfo->auth);
255 int ndist = le32_to_cpu(dirinfo->ndist);
260 spin_lock(&ci->i_ceph_lock);
262 diri_auth = ci->i_auth_cap->mds;
263 spin_unlock(&ci->i_ceph_lock);
265 if (mds == -1) /* CDIR_AUTH_PARENT */
268 mutex_lock(&ci->i_fragtree_mutex);
269 if (ndist == 0 && mds == diri_auth) {
270 /* no delegation info needed. */
271 frag = __ceph_find_frag(ci, id);
274 if (frag->split_by == 0) {
275 /* tree leaf, remove */
276 dout("fill_dirfrag removed %llx.%llx frag %x"
277 " (no ref)\n", ceph_vinop(inode), id);
278 rb_erase(&frag->node, &ci->i_fragtree);
281 /* tree branch, keep and clear */
282 dout("fill_dirfrag cleared %llx.%llx frag %x"
283 " referral\n", ceph_vinop(inode), id);
291 /* find/add this frag to store mds delegation info */
292 frag = __get_or_create_frag(ci, id);
294 /* this is not the end of the world; we can continue
295 with bad/inaccurate delegation info */
296 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
297 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
303 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
304 for (i = 0; i < frag->ndist; i++)
305 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
306 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
307 ceph_vinop(inode), frag->frag, frag->ndist);
310 mutex_unlock(&ci->i_fragtree_mutex);
314 static int frag_tree_split_cmp(const void *l, const void *r)
316 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
317 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
318 return ceph_frag_compare(le32_to_cpu(ls->frag),
319 le32_to_cpu(rs->frag));
322 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
325 return f == ceph_frag_make(0, 0);
326 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
328 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
331 static int ceph_fill_fragtree(struct inode *inode,
332 struct ceph_frag_tree_head *fragtree,
333 struct ceph_mds_reply_dirfrag *dirinfo)
335 struct ceph_inode_info *ci = ceph_inode(inode);
336 struct ceph_inode_frag *frag, *prev_frag = NULL;
337 struct rb_node *rb_node;
338 unsigned i, split_by, nsplits;
342 mutex_lock(&ci->i_fragtree_mutex);
343 nsplits = le32_to_cpu(fragtree->nsplits);
344 if (nsplits != ci->i_fragtree_nsplits) {
346 } else if (nsplits) {
347 i = prandom_u32() % nsplits;
348 id = le32_to_cpu(fragtree->splits[i].frag);
349 if (!__ceph_find_frag(ci, id))
351 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
352 rb_node = rb_first(&ci->i_fragtree);
353 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
354 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
357 if (!update && dirinfo) {
358 id = le32_to_cpu(dirinfo->frag);
359 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
366 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
367 frag_tree_split_cmp, NULL);
370 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
371 rb_node = rb_first(&ci->i_fragtree);
372 for (i = 0; i < nsplits; i++) {
373 id = le32_to_cpu(fragtree->splits[i].frag);
374 split_by = le32_to_cpu(fragtree->splits[i].by);
375 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
376 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
377 "frag %x split by %d\n", ceph_vinop(inode),
378 i, nsplits, id, split_by);
383 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
384 if (ceph_frag_compare(frag->frag, id) >= 0) {
385 if (frag->frag != id)
388 rb_node = rb_next(rb_node);
391 rb_node = rb_next(rb_node);
392 /* delete stale split/leaf node */
393 if (frag->split_by > 0 ||
394 !is_frag_child(frag->frag, prev_frag)) {
395 rb_erase(&frag->node, &ci->i_fragtree);
396 if (frag->split_by > 0)
397 ci->i_fragtree_nsplits--;
403 frag = __get_or_create_frag(ci, id);
407 if (frag->split_by == 0)
408 ci->i_fragtree_nsplits++;
409 frag->split_by = split_by;
410 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
414 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
415 rb_node = rb_next(rb_node);
416 /* delete stale split/leaf node */
417 if (frag->split_by > 0 ||
418 !is_frag_child(frag->frag, prev_frag)) {
419 rb_erase(&frag->node, &ci->i_fragtree);
420 if (frag->split_by > 0)
421 ci->i_fragtree_nsplits--;
426 mutex_unlock(&ci->i_fragtree_mutex);
431 * initialize a newly allocated inode.
433 struct inode *ceph_alloc_inode(struct super_block *sb)
435 struct ceph_inode_info *ci;
438 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
442 dout("alloc_inode %p\n", &ci->vfs_inode);
444 spin_lock_init(&ci->i_ceph_lock);
447 ci->i_inline_version = 0;
448 ci->i_time_warp_seq = 0;
449 ci->i_ceph_flags = 0;
450 atomic64_set(&ci->i_ordered_count, 1);
451 atomic64_set(&ci->i_release_count, 1);
452 atomic64_set(&ci->i_complete_seq[0], 0);
453 atomic64_set(&ci->i_complete_seq[1], 0);
454 ci->i_symlink = NULL;
459 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
460 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout));
461 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
463 ci->i_fragtree = RB_ROOT;
464 mutex_init(&ci->i_fragtree_mutex);
466 ci->i_xattrs.blob = NULL;
467 ci->i_xattrs.prealloc_blob = NULL;
468 ci->i_xattrs.dirty = false;
469 ci->i_xattrs.index = RB_ROOT;
470 ci->i_xattrs.count = 0;
471 ci->i_xattrs.names_size = 0;
472 ci->i_xattrs.vals_size = 0;
473 ci->i_xattrs.version = 0;
474 ci->i_xattrs.index_version = 0;
476 ci->i_caps = RB_ROOT;
477 ci->i_auth_cap = NULL;
478 ci->i_dirty_caps = 0;
479 ci->i_flushing_caps = 0;
480 INIT_LIST_HEAD(&ci->i_dirty_item);
481 INIT_LIST_HEAD(&ci->i_flushing_item);
482 ci->i_prealloc_cap_flush = NULL;
483 INIT_LIST_HEAD(&ci->i_cap_flush_list);
484 init_waitqueue_head(&ci->i_cap_wq);
485 ci->i_hold_caps_max = 0;
486 INIT_LIST_HEAD(&ci->i_cap_delay_list);
487 INIT_LIST_HEAD(&ci->i_cap_snaps);
488 ci->i_head_snapc = NULL;
491 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ;
492 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
493 ci->i_nr_by_mode[i] = 0;
495 mutex_init(&ci->i_truncate_mutex);
496 ci->i_truncate_seq = 0;
497 ci->i_truncate_size = 0;
498 ci->i_truncate_pending = 0;
501 ci->i_reported_size = 0;
502 ci->i_wanted_max_size = 0;
503 ci->i_requested_max_size = 0;
507 ci->i_rdcache_ref = 0;
511 ci->i_wrbuffer_ref = 0;
512 ci->i_wrbuffer_ref_head = 0;
513 atomic_set(&ci->i_filelock_ref, 0);
514 atomic_set(&ci->i_shared_gen, 1);
515 ci->i_rdcache_gen = 0;
516 ci->i_rdcache_revoking = 0;
518 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
519 INIT_LIST_HEAD(&ci->i_unsafe_iops);
520 spin_lock_init(&ci->i_unsafe_lock);
522 ci->i_snap_realm = NULL;
523 INIT_LIST_HEAD(&ci->i_snap_realm_item);
524 INIT_LIST_HEAD(&ci->i_snap_flush_item);
526 INIT_WORK(&ci->i_work, ceph_inode_work);
528 memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
530 ceph_fscache_inode_init(ci);
532 return &ci->vfs_inode;
535 void ceph_free_inode(struct inode *inode)
537 struct ceph_inode_info *ci = ceph_inode(inode);
539 kfree(ci->i_symlink);
540 kmem_cache_free(ceph_inode_cachep, ci);
543 void ceph_evict_inode(struct inode *inode)
545 struct ceph_inode_info *ci = ceph_inode(inode);
546 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
547 struct ceph_inode_frag *frag;
550 dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
552 percpu_counter_dec(&mdsc->metric.total_inodes);
554 truncate_inode_pages_final(&inode->i_data);
557 ceph_fscache_unregister_inode_cookie(ci);
559 __ceph_remove_caps(ci);
561 if (__ceph_has_any_quota(ci))
562 ceph_adjust_quota_realms_count(inode, false);
565 * we may still have a snap_realm reference if there are stray
566 * caps in i_snap_caps.
568 if (ci->i_snap_realm) {
569 if (ceph_snap(inode) == CEPH_NOSNAP) {
570 struct ceph_snap_realm *realm = ci->i_snap_realm;
571 dout(" dropping residual ref to snap realm %p\n",
573 spin_lock(&realm->inodes_with_caps_lock);
574 list_del_init(&ci->i_snap_realm_item);
575 ci->i_snap_realm = NULL;
576 if (realm->ino == ci->i_vino.ino)
578 spin_unlock(&realm->inodes_with_caps_lock);
579 ceph_put_snap_realm(mdsc, realm);
581 ceph_put_snapid_map(mdsc, ci->i_snapid_map);
582 ci->i_snap_realm = NULL;
586 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
587 frag = rb_entry(n, struct ceph_inode_frag, node);
588 rb_erase(n, &ci->i_fragtree);
591 ci->i_fragtree_nsplits = 0;
593 __ceph_destroy_xattrs(ci);
594 if (ci->i_xattrs.blob)
595 ceph_buffer_put(ci->i_xattrs.blob);
596 if (ci->i_xattrs.prealloc_blob)
597 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
599 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
600 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns));
603 static inline blkcnt_t calc_inode_blocks(u64 size)
605 return (size + (1<<9) - 1) >> 9;
609 * Helpers to fill in size, ctime, mtime, and atime. We have to be
610 * careful because either the client or MDS may have more up to date
611 * info, depending on which capabilities are held, and whether
612 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
613 * and size are monotonically increasing, except when utimes() or
614 * truncate() increments the corresponding _seq values.)
616 int ceph_fill_file_size(struct inode *inode, int issued,
617 u32 truncate_seq, u64 truncate_size, u64 size)
619 struct ceph_inode_info *ci = ceph_inode(inode);
622 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
623 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
624 dout("size %lld -> %llu\n", inode->i_size, size);
625 if (size > 0 && S_ISDIR(inode->i_mode)) {
626 pr_err("fill_file_size non-zero size for directory\n");
629 i_size_write(inode, size);
630 inode->i_blocks = calc_inode_blocks(size);
631 ci->i_reported_size = size;
632 if (truncate_seq != ci->i_truncate_seq) {
633 dout("truncate_seq %u -> %u\n",
634 ci->i_truncate_seq, truncate_seq);
635 ci->i_truncate_seq = truncate_seq;
637 /* the MDS should have revoked these caps */
638 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD |
639 CEPH_CAP_FILE_LAZYIO));
641 * If we hold relevant caps, or in the case where we're
642 * not the only client referencing this file and we
643 * don't hold those caps, then we need to check whether
644 * the file is either opened or mmaped
646 if ((issued & (CEPH_CAP_FILE_CACHE|
647 CEPH_CAP_FILE_BUFFER)) ||
648 mapping_mapped(inode->i_mapping) ||
649 __ceph_is_file_opened(ci)) {
650 ci->i_truncate_pending++;
655 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
656 ci->i_truncate_size != truncate_size) {
657 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
659 ci->i_truncate_size = truncate_size;
663 ceph_fscache_invalidate(inode);
668 void ceph_fill_file_time(struct inode *inode, int issued,
669 u64 time_warp_seq, struct timespec64 *ctime,
670 struct timespec64 *mtime, struct timespec64 *atime)
672 struct ceph_inode_info *ci = ceph_inode(inode);
675 if (issued & (CEPH_CAP_FILE_EXCL|
677 CEPH_CAP_FILE_BUFFER|
679 CEPH_CAP_XATTR_EXCL)) {
680 if (ci->i_version == 0 ||
681 timespec64_compare(ctime, &inode->i_ctime) > 0) {
682 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
683 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
684 ctime->tv_sec, ctime->tv_nsec);
685 inode->i_ctime = *ctime;
687 if (ci->i_version == 0 ||
688 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
689 /* the MDS did a utimes() */
690 dout("mtime %lld.%09ld -> %lld.%09ld "
692 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
693 mtime->tv_sec, mtime->tv_nsec,
694 ci->i_time_warp_seq, (int)time_warp_seq);
696 inode->i_mtime = *mtime;
697 inode->i_atime = *atime;
698 ci->i_time_warp_seq = time_warp_seq;
699 } else if (time_warp_seq == ci->i_time_warp_seq) {
700 /* nobody did utimes(); take the max */
701 if (timespec64_compare(mtime, &inode->i_mtime) > 0) {
702 dout("mtime %lld.%09ld -> %lld.%09ld inc\n",
703 inode->i_mtime.tv_sec,
704 inode->i_mtime.tv_nsec,
705 mtime->tv_sec, mtime->tv_nsec);
706 inode->i_mtime = *mtime;
708 if (timespec64_compare(atime, &inode->i_atime) > 0) {
709 dout("atime %lld.%09ld -> %lld.%09ld inc\n",
710 inode->i_atime.tv_sec,
711 inode->i_atime.tv_nsec,
712 atime->tv_sec, atime->tv_nsec);
713 inode->i_atime = *atime;
715 } else if (issued & CEPH_CAP_FILE_EXCL) {
716 /* we did a utimes(); ignore mds values */
721 /* we have no write|excl caps; whatever the MDS says is true */
722 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
723 inode->i_ctime = *ctime;
724 inode->i_mtime = *mtime;
725 inode->i_atime = *atime;
726 ci->i_time_warp_seq = time_warp_seq;
731 if (warn) /* time_warp_seq shouldn't go backwards */
732 dout("%p mds time_warp_seq %llu < %u\n",
733 inode, time_warp_seq, ci->i_time_warp_seq);
737 * Populate an inode based on info from mds. May be called on new or
740 int ceph_fill_inode(struct inode *inode, struct page *locked_page,
741 struct ceph_mds_reply_info_in *iinfo,
742 struct ceph_mds_reply_dirfrag *dirinfo,
743 struct ceph_mds_session *session, int cap_fmode,
744 struct ceph_cap_reservation *caps_reservation)
746 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
747 struct ceph_mds_reply_inode *info = iinfo->in;
748 struct ceph_inode_info *ci = ceph_inode(inode);
749 int issued, new_issued, info_caps;
750 struct timespec64 mtime, atime, ctime;
751 struct ceph_buffer *xattr_blob = NULL;
752 struct ceph_buffer *old_blob = NULL;
753 struct ceph_string *pool_ns = NULL;
754 struct ceph_cap *new_cap = NULL;
757 bool queue_trunc = false;
758 bool new_version = false;
759 bool fill_inline = false;
761 lockdep_assert_held(&mdsc->snap_rwsem);
763 dout("%s %p ino %llx.%llx v %llu had %llu\n", __func__,
764 inode, ceph_vinop(inode), le64_to_cpu(info->version),
767 info_caps = le32_to_cpu(info->cap.caps);
769 /* prealloc new cap struct */
770 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) {
771 new_cap = ceph_get_cap(mdsc, caps_reservation);
777 * prealloc xattr data, if it looks like we'll need it. only
778 * if len > 4 (meaning there are actually xattrs; the first 4
779 * bytes are the xattr count).
781 if (iinfo->xattr_len > 4) {
782 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
784 pr_err("%s ENOMEM xattr blob %d bytes\n", __func__,
788 if (iinfo->pool_ns_len > 0)
789 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
792 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map)
793 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode));
795 spin_lock(&ci->i_ceph_lock);
798 * provided version will be odd if inode value is projected,
799 * even if stable. skip the update if we have newer stable
800 * info (ours>=theirs, e.g. due to racing mds replies), unless
801 * we are getting projected (unstable) info (in which case the
802 * version is odd, and we want ours>theirs).
808 if (ci->i_version == 0 ||
809 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
810 le64_to_cpu(info->version) > (ci->i_version & ~1)))
813 /* Update change_attribute */
814 inode_set_max_iversion_raw(inode, iinfo->change_attr);
816 __ceph_caps_issued(ci, &issued);
817 issued |= __ceph_caps_dirty(ci);
818 new_issued = ~issued & info_caps;
821 inode->i_rdev = le32_to_cpu(info->rdev);
822 /* directories have fl_stripe_unit set to zero */
823 if (le32_to_cpu(info->layout.fl_stripe_unit))
825 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
827 inode->i_blkbits = CEPH_BLOCK_SHIFT;
829 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
831 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
832 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
833 inode->i_mode = le32_to_cpu(info->mode);
834 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
835 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
836 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
837 from_kuid(&init_user_ns, inode->i_uid),
838 from_kgid(&init_user_ns, inode->i_gid));
839 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
840 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
843 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
844 (issued & CEPH_CAP_LINK_EXCL) == 0)
845 set_nlink(inode, le32_to_cpu(info->nlink));
847 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
848 /* be careful with mtime, atime, size */
849 ceph_decode_timespec64(&atime, &info->atime);
850 ceph_decode_timespec64(&mtime, &info->mtime);
851 ceph_decode_timespec64(&ctime, &info->ctime);
852 ceph_fill_file_time(inode, issued,
853 le32_to_cpu(info->time_warp_seq),
854 &ctime, &mtime, &atime);
857 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) {
858 ci->i_files = le64_to_cpu(info->files);
859 ci->i_subdirs = le64_to_cpu(info->subdirs);
863 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
864 s64 old_pool = ci->i_layout.pool_id;
865 struct ceph_string *old_ns;
867 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
868 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
869 lockdep_is_held(&ci->i_ceph_lock));
870 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
872 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
873 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
877 queue_trunc = ceph_fill_file_size(inode, issued,
878 le32_to_cpu(info->truncate_seq),
879 le64_to_cpu(info->truncate_size),
880 le64_to_cpu(info->size));
881 /* only update max_size on auth cap */
882 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
883 ci->i_max_size != le64_to_cpu(info->max_size)) {
884 dout("max_size %lld -> %llu\n", ci->i_max_size,
885 le64_to_cpu(info->max_size));
886 ci->i_max_size = le64_to_cpu(info->max_size);
890 /* layout and rstat are not tracked by capability, update them if
891 * the inode info is from auth mds */
892 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) {
893 if (S_ISDIR(inode->i_mode)) {
894 ci->i_dir_layout = iinfo->dir_layout;
895 ci->i_rbytes = le64_to_cpu(info->rbytes);
896 ci->i_rfiles = le64_to_cpu(info->rfiles);
897 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
898 ci->i_dir_pin = iinfo->dir_pin;
899 ceph_decode_timespec64(&ci->i_rctime, &info->rctime);
904 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
905 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
906 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
907 if (ci->i_xattrs.blob)
908 old_blob = ci->i_xattrs.blob;
909 ci->i_xattrs.blob = xattr_blob;
911 memcpy(ci->i_xattrs.blob->vec.iov_base,
912 iinfo->xattr_data, iinfo->xattr_len);
913 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
914 ceph_forget_all_cached_acls(inode);
915 ceph_security_invalidate_secctx(inode);
919 /* finally update i_version */
920 if (le64_to_cpu(info->version) > ci->i_version)
921 ci->i_version = le64_to_cpu(info->version);
923 inode->i_mapping->a_ops = &ceph_aops;
925 switch (inode->i_mode & S_IFMT) {
930 inode->i_blkbits = PAGE_SHIFT;
931 init_special_inode(inode, inode->i_mode, inode->i_rdev);
932 inode->i_op = &ceph_file_iops;
935 inode->i_op = &ceph_file_iops;
936 inode->i_fop = &ceph_file_fops;
939 inode->i_op = &ceph_symlink_iops;
940 if (!ci->i_symlink) {
941 u32 symlen = iinfo->symlink_len;
944 spin_unlock(&ci->i_ceph_lock);
946 if (symlen != i_size_read(inode)) {
947 pr_err("%s %llx.%llx BAD symlink "
948 "size %lld\n", __func__,
951 i_size_write(inode, symlen);
952 inode->i_blocks = calc_inode_blocks(symlen);
956 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
960 spin_lock(&ci->i_ceph_lock);
964 kfree(sym); /* lost a race */
966 inode->i_link = ci->i_symlink;
969 inode->i_op = &ceph_dir_iops;
970 inode->i_fop = &ceph_dir_fops;
973 pr_err("%s %llx.%llx BAD mode 0%o\n", __func__,
974 ceph_vinop(inode), inode->i_mode);
977 /* were we issued a capability? */
979 if (ceph_snap(inode) == CEPH_NOSNAP) {
980 ceph_add_cap(inode, session,
981 le64_to_cpu(info->cap.cap_id),
983 le32_to_cpu(info->cap.wanted),
984 le32_to_cpu(info->cap.seq),
985 le32_to_cpu(info->cap.mseq),
986 le64_to_cpu(info->cap.realm),
987 info->cap.flags, &new_cap);
989 /* set dir completion flag? */
990 if (S_ISDIR(inode->i_mode) &&
991 ci->i_files == 0 && ci->i_subdirs == 0 &&
992 (info_caps & CEPH_CAP_FILE_SHARED) &&
993 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
994 !__ceph_dir_is_complete(ci)) {
995 dout(" marking %p complete (empty)\n", inode);
996 i_size_write(inode, 0);
997 __ceph_dir_set_complete(ci,
998 atomic64_read(&ci->i_release_count),
999 atomic64_read(&ci->i_ordered_count));
1004 dout(" %p got snap_caps %s\n", inode,
1005 ceph_cap_string(info_caps));
1006 ci->i_snap_caps |= info_caps;
1010 if (iinfo->inline_version > 0 &&
1011 iinfo->inline_version >= ci->i_inline_version) {
1012 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1013 ci->i_inline_version = iinfo->inline_version;
1014 if (ci->i_inline_version != CEPH_INLINE_NONE &&
1015 (locked_page || (info_caps & cache_caps)))
1019 if (cap_fmode >= 0) {
1021 pr_warn("mds issued no caps on %llx.%llx\n",
1023 __ceph_touch_fmode(ci, mdsc, cap_fmode);
1026 spin_unlock(&ci->i_ceph_lock);
1029 ceph_fill_inline_data(inode, locked_page,
1030 iinfo->inline_data, iinfo->inline_len);
1033 wake_up_all(&ci->i_cap_wq);
1035 /* queue truncate if we saw i_size decrease */
1037 ceph_queue_vmtruncate(inode);
1039 /* populate frag tree */
1040 if (S_ISDIR(inode->i_mode))
1041 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
1043 /* update delegation info? */
1045 ceph_fill_dirfrag(inode, dirinfo);
1050 ceph_put_cap(mdsc, new_cap);
1051 ceph_buffer_put(old_blob);
1052 ceph_buffer_put(xattr_blob);
1053 ceph_put_string(pool_ns);
1058 * caller should hold session s_mutex and dentry->d_lock.
1060 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry,
1061 struct ceph_mds_reply_lease *lease,
1062 struct ceph_mds_session *session,
1063 unsigned long from_time,
1064 struct ceph_mds_session **old_lease_session)
1066 struct ceph_dentry_info *di = ceph_dentry(dentry);
1067 unsigned mask = le16_to_cpu(lease->mask);
1068 long unsigned duration = le32_to_cpu(lease->duration_ms);
1069 long unsigned ttl = from_time + (duration * HZ) / 1000;
1070 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
1072 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1073 dentry, duration, ttl);
1075 /* only track leases on regular dentries */
1076 if (ceph_snap(dir) != CEPH_NOSNAP)
1079 if (mask & CEPH_LEASE_PRIMARY_LINK)
1080 di->flags |= CEPH_DENTRY_PRIMARY_LINK;
1082 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK;
1084 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
1085 if (!(mask & CEPH_LEASE_VALID)) {
1086 __ceph_dentry_dir_lease_touch(di);
1090 if (di->lease_gen == session->s_cap_gen &&
1091 time_before(ttl, di->time))
1092 return; /* we already have a newer lease. */
1094 if (di->lease_session && di->lease_session != session) {
1095 *old_lease_session = di->lease_session;
1096 di->lease_session = NULL;
1099 if (!di->lease_session)
1100 di->lease_session = ceph_get_mds_session(session);
1101 di->lease_gen = session->s_cap_gen;
1102 di->lease_seq = le32_to_cpu(lease->seq);
1103 di->lease_renew_after = half_ttl;
1104 di->lease_renew_from = 0;
1107 __ceph_dentry_lease_touch(di);
1110 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry,
1111 struct ceph_mds_reply_lease *lease,
1112 struct ceph_mds_session *session,
1113 unsigned long from_time)
1115 struct ceph_mds_session *old_lease_session = NULL;
1116 spin_lock(&dentry->d_lock);
1117 __update_dentry_lease(dir, dentry, lease, session, from_time,
1118 &old_lease_session);
1119 spin_unlock(&dentry->d_lock);
1120 ceph_put_mds_session(old_lease_session);
1124 * update dentry lease without having parent inode locked
1126 static void update_dentry_lease_careful(struct dentry *dentry,
1127 struct ceph_mds_reply_lease *lease,
1128 struct ceph_mds_session *session,
1129 unsigned long from_time,
1130 char *dname, u32 dname_len,
1131 struct ceph_vino *pdvino,
1132 struct ceph_vino *ptvino)
1136 struct ceph_mds_session *old_lease_session = NULL;
1138 spin_lock(&dentry->d_lock);
1139 /* make sure dentry's name matches target */
1140 if (dentry->d_name.len != dname_len ||
1141 memcmp(dentry->d_name.name, dname, dname_len))
1144 dir = d_inode(dentry->d_parent);
1145 /* make sure parent matches dvino */
1146 if (!ceph_ino_compare(dir, pdvino))
1149 /* make sure dentry's inode matches target. NULL ptvino means that
1150 * we expect a negative dentry */
1152 if (d_really_is_negative(dentry))
1154 if (!ceph_ino_compare(d_inode(dentry), ptvino))
1157 if (d_really_is_positive(dentry))
1161 __update_dentry_lease(dir, dentry, lease, session,
1162 from_time, &old_lease_session);
1164 spin_unlock(&dentry->d_lock);
1165 ceph_put_mds_session(old_lease_session);
1169 * splice a dentry to an inode.
1170 * caller must hold directory i_mutex for this to be safe.
1172 static int splice_dentry(struct dentry **pdn, struct inode *in)
1174 struct dentry *dn = *pdn;
1175 struct dentry *realdn;
1177 BUG_ON(d_inode(dn));
1179 if (S_ISDIR(in->i_mode)) {
1180 /* If inode is directory, d_splice_alias() below will remove
1181 * 'realdn' from its origin parent. We need to ensure that
1182 * origin parent's readdir cache will not reference 'realdn'
1184 realdn = d_find_any_alias(in);
1186 struct ceph_dentry_info *di = ceph_dentry(realdn);
1187 spin_lock(&realdn->d_lock);
1189 realdn->d_op->d_prune(realdn);
1192 di->lease_shared_gen = 0;
1195 spin_unlock(&realdn->d_lock);
1200 /* dn must be unhashed */
1201 if (!d_unhashed(dn))
1203 realdn = d_splice_alias(in, dn);
1204 if (IS_ERR(realdn)) {
1205 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1206 PTR_ERR(realdn), dn, in, ceph_vinop(in));
1207 return PTR_ERR(realdn);
1211 dout("dn %p (%d) spliced with %p (%d) "
1212 "inode %p ino %llx.%llx\n",
1214 realdn, d_count(realdn),
1215 d_inode(realdn), ceph_vinop(d_inode(realdn)));
1219 BUG_ON(!ceph_dentry(dn));
1220 dout("dn %p attached to %p ino %llx.%llx\n",
1221 dn, d_inode(dn), ceph_vinop(d_inode(dn)));
1227 * Incorporate results into the local cache. This is either just
1228 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1231 * A reply may contain
1232 * a directory inode along with a dentry.
1233 * and/or a target inode
1235 * Called with snap_rwsem (read).
1237 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
1239 struct ceph_mds_session *session = req->r_session;
1240 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1241 struct inode *in = NULL;
1242 struct ceph_vino tvino, dvino;
1243 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1246 dout("fill_trace %p is_dentry %d is_target %d\n", req,
1247 rinfo->head->is_dentry, rinfo->head->is_target);
1249 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1250 dout("fill_trace reply is empty!\n");
1251 if (rinfo->head->result == 0 && req->r_parent)
1252 ceph_invalidate_dir_request(req);
1256 if (rinfo->head->is_dentry) {
1257 struct inode *dir = req->r_parent;
1260 err = ceph_fill_inode(dir, NULL, &rinfo->diri,
1261 rinfo->dirfrag, session, -1,
1262 &req->r_caps_reservation);
1269 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME &&
1270 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1271 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1273 struct dentry *dn, *parent;
1275 BUG_ON(!rinfo->head->is_target);
1276 BUG_ON(req->r_dentry);
1278 parent = d_find_any_alias(dir);
1281 dname.name = rinfo->dname;
1282 dname.len = rinfo->dname_len;
1283 dname.hash = full_name_hash(parent, dname.name, dname.len);
1284 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1285 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1287 dn = d_lookup(parent, &dname);
1288 dout("d_lookup on parent=%p name=%.*s got %p\n",
1289 parent, dname.len, dname.name, dn);
1292 dn = d_alloc(parent, &dname);
1293 dout("d_alloc %p '%.*s' = %p\n", parent,
1294 dname.len, dname.name, dn);
1301 } else if (d_really_is_positive(dn) &&
1302 (ceph_ino(d_inode(dn)) != tvino.ino ||
1303 ceph_snap(d_inode(dn)) != tvino.snap)) {
1304 dout(" dn %p points to wrong inode %p\n",
1306 ceph_dir_clear_ordered(dir);
1317 if (rinfo->head->is_target) {
1318 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1319 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1321 in = ceph_get_inode(sb, tvino);
1327 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti,
1329 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1330 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) &&
1331 rinfo->head->result == 0) ? req->r_fmode : -1,
1332 &req->r_caps_reservation);
1334 pr_err("ceph_fill_inode badness %p %llx.%llx\n",
1335 in, ceph_vinop(in));
1336 if (in->i_state & I_NEW)
1337 discard_new_inode(in);
1342 req->r_target_inode = in;
1343 if (in->i_state & I_NEW)
1344 unlock_new_inode(in);
1348 * ignore null lease/binding on snapdir ENOENT, or else we
1349 * will have trouble splicing in the virtual snapdir later
1351 if (rinfo->head->is_dentry &&
1352 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1353 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1354 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1355 fsc->mount_options->snapdir_name,
1356 req->r_dentry->d_name.len))) {
1358 * lookup link rename : null -> possibly existing inode
1359 * mknod symlink mkdir : null -> new inode
1360 * unlink : linked -> null
1362 struct inode *dir = req->r_parent;
1363 struct dentry *dn = req->r_dentry;
1364 bool have_dir_cap, have_lease;
1368 BUG_ON(d_inode(dn->d_parent) != dir);
1370 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1371 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1373 BUG_ON(ceph_ino(dir) != dvino.ino);
1374 BUG_ON(ceph_snap(dir) != dvino.snap);
1376 /* do we have a lease on the whole dir? */
1378 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1379 CEPH_CAP_FILE_SHARED);
1381 /* do we have a dn lease? */
1382 have_lease = have_dir_cap ||
1383 le32_to_cpu(rinfo->dlease->duration_ms);
1385 dout("fill_trace no dentry lease or dir cap\n");
1388 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1389 struct inode *olddir = req->r_old_dentry_dir;
1392 dout(" src %p '%pd' dst %p '%pd'\n",
1396 dout("fill_trace doing d_move %p -> %p\n",
1397 req->r_old_dentry, dn);
1399 /* d_move screws up sibling dentries' offsets */
1400 ceph_dir_clear_ordered(dir);
1401 ceph_dir_clear_ordered(olddir);
1403 d_move(req->r_old_dentry, dn);
1404 dout(" src %p '%pd' dst %p '%pd'\n",
1409 /* ensure target dentry is invalidated, despite
1410 rehashing bug in vfs_rename_dir */
1411 ceph_invalidate_dentry_lease(dn);
1413 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1414 ceph_dentry(req->r_old_dentry)->offset);
1416 /* swap r_dentry and r_old_dentry in case that
1417 * splice_dentry() gets called later. This is safe
1418 * because no other place will use them */
1419 req->r_dentry = req->r_old_dentry;
1420 req->r_old_dentry = dn;
1425 if (!rinfo->head->is_target) {
1426 dout("fill_trace null dentry\n");
1427 if (d_really_is_positive(dn)) {
1428 dout("d_delete %p\n", dn);
1429 ceph_dir_clear_ordered(dir);
1431 } else if (have_lease) {
1434 update_dentry_lease(dir, dn,
1435 rinfo->dlease, session,
1436 req->r_request_started);
1441 /* attach proper inode */
1442 if (d_really_is_negative(dn)) {
1443 ceph_dir_clear_ordered(dir);
1445 err = splice_dentry(&req->r_dentry, in);
1448 dn = req->r_dentry; /* may have spliced */
1449 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
1450 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1451 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1458 update_dentry_lease(dir, dn,
1459 rinfo->dlease, session,
1460 req->r_request_started);
1462 dout(" final dn %p\n", dn);
1463 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1464 req->r_op == CEPH_MDS_OP_MKSNAP) &&
1465 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1466 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1467 struct inode *dir = req->r_parent;
1469 /* fill out a snapdir LOOKUPSNAP dentry */
1471 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
1472 BUG_ON(!req->r_dentry);
1473 dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry);
1474 ceph_dir_clear_ordered(dir);
1476 err = splice_dentry(&req->r_dentry, in);
1479 } else if (rinfo->head->is_dentry && req->r_dentry) {
1480 /* parent inode is not locked, be carefull */
1481 struct ceph_vino *ptvino = NULL;
1482 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1483 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1484 if (rinfo->head->is_target) {
1485 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1486 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1489 update_dentry_lease_careful(req->r_dentry, rinfo->dlease,
1490 session, req->r_request_started,
1491 rinfo->dname, rinfo->dname_len,
1495 dout("fill_trace done err=%d\n", err);
1500 * Prepopulate our cache with readdir results, leases, etc.
1502 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1503 struct ceph_mds_session *session)
1505 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1508 for (i = 0; i < rinfo->dir_nr; i++) {
1509 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1510 struct ceph_vino vino;
1514 vino.ino = le64_to_cpu(rde->inode.in->ino);
1515 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1517 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1520 dout("new_inode badness got %d\n", err);
1523 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
1524 -1, &req->r_caps_reservation);
1526 pr_err("ceph_fill_inode badness on %p got %d\n",
1529 if (in->i_state & I_NEW) {
1531 discard_new_inode(in);
1533 } else if (in->i_state & I_NEW) {
1534 unlock_new_inode(in);
1537 /* avoid calling iput_final() in mds dispatch threads */
1538 ceph_async_iput(in);
1544 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1548 put_page(ctl->page);
1553 static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1554 struct ceph_readdir_cache_control *ctl,
1555 struct ceph_mds_request *req)
1557 struct ceph_inode_info *ci = ceph_inode(dir);
1558 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
1559 unsigned idx = ctl->index % nsize;
1560 pgoff_t pgoff = ctl->index / nsize;
1562 if (!ctl->page || pgoff != page_index(ctl->page)) {
1563 ceph_readdir_cache_release(ctl);
1565 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1567 ctl->page = find_lock_page(&dir->i_data, pgoff);
1570 return idx == 0 ? -ENOMEM : 0;
1572 /* reading/filling the cache are serialized by
1573 * i_mutex, no need to use page lock */
1574 unlock_page(ctl->page);
1575 ctl->dentries = kmap(ctl->page);
1577 memset(ctl->dentries, 0, PAGE_SIZE);
1580 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1581 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1582 dout("readdir cache dn %p idx %d\n", dn, ctl->index);
1583 ctl->dentries[idx] = dn;
1586 dout("disable readdir cache\n");
1592 int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1593 struct ceph_mds_session *session)
1595 struct dentry *parent = req->r_dentry;
1596 struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
1597 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1601 int err = 0, skipped = 0, ret, i;
1602 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1603 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1606 struct ceph_readdir_cache_control cache_ctl = {};
1608 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
1609 return readdir_prepopulate_inodes_only(req, session);
1611 if (rinfo->hash_order) {
1613 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1615 strlen(req->r_path2));
1616 last_hash = ceph_frag_value(last_hash);
1617 } else if (rinfo->offset_hash) {
1618 /* mds understands offset_hash */
1619 WARN_ON_ONCE(req->r_readdir_offset != 2);
1620 last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
1624 if (rinfo->dir_dir &&
1625 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1626 dout("readdir_prepopulate got new frag %x -> %x\n",
1627 frag, le32_to_cpu(rinfo->dir_dir->frag));
1628 frag = le32_to_cpu(rinfo->dir_dir->frag);
1629 if (!rinfo->hash_order)
1630 req->r_readdir_offset = 2;
1633 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1634 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1635 rinfo->dir_nr, parent);
1637 dout("readdir_prepopulate %d items under dn %p\n",
1638 rinfo->dir_nr, parent);
1640 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
1642 if (ceph_frag_is_leftmost(frag) &&
1643 req->r_readdir_offset == 2 &&
1644 !(rinfo->hash_order && last_hash)) {
1645 /* note dir version at start of readdir so we can
1646 * tell if any dentries get dropped */
1647 req->r_dir_release_cnt =
1648 atomic64_read(&ci->i_release_count);
1649 req->r_dir_ordered_cnt =
1650 atomic64_read(&ci->i_ordered_count);
1651 req->r_readdir_cache_idx = 0;
1655 cache_ctl.index = req->r_readdir_cache_idx;
1656 fpos_offset = req->r_readdir_offset;
1658 /* FIXME: release caps/leases if error occurs */
1659 for (i = 0; i < rinfo->dir_nr; i++) {
1660 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1661 struct ceph_vino tvino;
1663 dname.name = rde->name;
1664 dname.len = rde->name_len;
1665 dname.hash = full_name_hash(parent, dname.name, dname.len);
1667 tvino.ino = le64_to_cpu(rde->inode.in->ino);
1668 tvino.snap = le64_to_cpu(rde->inode.in->snapid);
1670 if (rinfo->hash_order) {
1671 u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1672 rde->name, rde->name_len);
1673 hash = ceph_frag_value(hash);
1674 if (hash != last_hash)
1677 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1679 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1683 dn = d_lookup(parent, &dname);
1684 dout("d_lookup on parent=%p name=%.*s got %p\n",
1685 parent, dname.len, dname.name, dn);
1688 dn = d_alloc(parent, &dname);
1689 dout("d_alloc %p '%.*s' = %p\n", parent,
1690 dname.len, dname.name, dn);
1692 dout("d_alloc badness\n");
1696 } else if (d_really_is_positive(dn) &&
1697 (ceph_ino(d_inode(dn)) != tvino.ino ||
1698 ceph_snap(d_inode(dn)) != tvino.snap)) {
1699 struct ceph_dentry_info *di = ceph_dentry(dn);
1700 dout(" dn %p points to wrong inode %p\n",
1703 spin_lock(&dn->d_lock);
1704 if (di->offset > 0 &&
1705 di->lease_shared_gen ==
1706 atomic_read(&ci->i_shared_gen)) {
1707 __ceph_dir_clear_ordered(ci);
1710 spin_unlock(&dn->d_lock);
1718 if (d_really_is_positive(dn)) {
1721 in = ceph_get_inode(parent->d_sb, tvino);
1723 dout("new_inode badness\n");
1731 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
1732 -1, &req->r_caps_reservation);
1734 pr_err("ceph_fill_inode badness on %p\n", in);
1735 if (d_really_is_negative(dn)) {
1736 /* avoid calling iput_final() in mds
1737 * dispatch threads */
1738 if (in->i_state & I_NEW) {
1740 discard_new_inode(in);
1742 ceph_async_iput(in);
1748 if (in->i_state & I_NEW)
1749 unlock_new_inode(in);
1751 if (d_really_is_negative(dn)) {
1752 if (ceph_security_xattr_deadlock(in)) {
1753 dout(" skip splicing dn %p to inode %p"
1754 " (security xattr deadlock)\n", dn, in);
1755 ceph_async_iput(in);
1760 err = splice_dentry(&dn, in);
1765 ceph_dentry(dn)->offset = rde->offset;
1767 update_dentry_lease(d_inode(parent), dn,
1768 rde->lease, req->r_session,
1769 req->r_request_started);
1771 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
1772 ret = fill_readdir_cache(d_inode(parent), dn,
1781 if (err == 0 && skipped == 0) {
1782 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
1783 req->r_readdir_cache_idx = cache_ctl.index;
1785 ceph_readdir_cache_release(&cache_ctl);
1786 dout("readdir_prepopulate done\n");
1790 bool ceph_inode_set_size(struct inode *inode, loff_t size)
1792 struct ceph_inode_info *ci = ceph_inode(inode);
1795 spin_lock(&ci->i_ceph_lock);
1796 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1797 i_size_write(inode, size);
1798 inode->i_blocks = calc_inode_blocks(size);
1800 ret = __ceph_should_report_size(ci);
1802 spin_unlock(&ci->i_ceph_lock);
1807 * Put reference to inode, but avoid calling iput_final() in current thread.
1808 * iput_final() may wait for reahahead pages. The wait can cause deadlock in
1811 void ceph_async_iput(struct inode *inode)
1816 if (atomic_add_unless(&inode->i_count, -1, 1))
1818 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1819 &ceph_inode(inode)->i_work))
1821 /* queue work failed, i_count must be at least 2 */
1826 * Write back inode data in a worker thread. (This can't be done
1827 * in the message handler context.)
1829 void ceph_queue_writeback(struct inode *inode)
1831 struct ceph_inode_info *ci = ceph_inode(inode);
1832 set_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask);
1835 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1837 dout("ceph_queue_writeback %p\n", inode);
1839 dout("ceph_queue_writeback %p already queued, mask=%lx\n",
1840 inode, ci->i_work_mask);
1846 * queue an async invalidation
1848 void ceph_queue_invalidate(struct inode *inode)
1850 struct ceph_inode_info *ci = ceph_inode(inode);
1851 set_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask);
1854 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1855 &ceph_inode(inode)->i_work)) {
1856 dout("ceph_queue_invalidate %p\n", inode);
1858 dout("ceph_queue_invalidate %p already queued, mask=%lx\n",
1859 inode, ci->i_work_mask);
1865 * Queue an async vmtruncate. If we fail to queue work, we will handle
1866 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1868 void ceph_queue_vmtruncate(struct inode *inode)
1870 struct ceph_inode_info *ci = ceph_inode(inode);
1871 set_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask);
1874 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1876 dout("ceph_queue_vmtruncate %p\n", inode);
1878 dout("ceph_queue_vmtruncate %p already queued, mask=%lx\n",
1879 inode, ci->i_work_mask);
1884 static void ceph_do_invalidate_pages(struct inode *inode)
1886 struct ceph_inode_info *ci = ceph_inode(inode);
1887 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1891 mutex_lock(&ci->i_truncate_mutex);
1893 if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
1894 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1895 inode, ceph_ino(inode));
1896 mapping_set_error(inode->i_mapping, -EIO);
1897 truncate_pagecache(inode, 0);
1898 mutex_unlock(&ci->i_truncate_mutex);
1902 spin_lock(&ci->i_ceph_lock);
1903 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1904 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1905 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1906 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1908 spin_unlock(&ci->i_ceph_lock);
1909 mutex_unlock(&ci->i_truncate_mutex);
1912 orig_gen = ci->i_rdcache_gen;
1913 spin_unlock(&ci->i_ceph_lock);
1915 ceph_fscache_invalidate(inode);
1916 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
1917 pr_err("invalidate_pages %p fails\n", inode);
1920 spin_lock(&ci->i_ceph_lock);
1921 if (orig_gen == ci->i_rdcache_gen &&
1922 orig_gen == ci->i_rdcache_revoking) {
1923 dout("invalidate_pages %p gen %d successful\n", inode,
1925 ci->i_rdcache_revoking--;
1928 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1929 inode, orig_gen, ci->i_rdcache_gen,
1930 ci->i_rdcache_revoking);
1931 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1934 spin_unlock(&ci->i_ceph_lock);
1935 mutex_unlock(&ci->i_truncate_mutex);
1938 ceph_check_caps(ci, 0, NULL);
1942 * Make sure any pending truncation is applied before doing anything
1943 * that may depend on it.
1945 void __ceph_do_pending_vmtruncate(struct inode *inode)
1947 struct ceph_inode_info *ci = ceph_inode(inode);
1949 int wrbuffer_refs, finish = 0;
1951 mutex_lock(&ci->i_truncate_mutex);
1953 spin_lock(&ci->i_ceph_lock);
1954 if (ci->i_truncate_pending == 0) {
1955 dout("__do_pending_vmtruncate %p none pending\n", inode);
1956 spin_unlock(&ci->i_ceph_lock);
1957 mutex_unlock(&ci->i_truncate_mutex);
1962 * make sure any dirty snapped pages are flushed before we
1963 * possibly truncate them.. so write AND block!
1965 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1966 spin_unlock(&ci->i_ceph_lock);
1967 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1969 filemap_write_and_wait_range(&inode->i_data, 0,
1970 inode->i_sb->s_maxbytes);
1974 /* there should be no reader or writer */
1975 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1977 to = ci->i_truncate_size;
1978 wrbuffer_refs = ci->i_wrbuffer_ref;
1979 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1980 ci->i_truncate_pending, to);
1981 spin_unlock(&ci->i_ceph_lock);
1983 truncate_pagecache(inode, to);
1985 spin_lock(&ci->i_ceph_lock);
1986 if (to == ci->i_truncate_size) {
1987 ci->i_truncate_pending = 0;
1990 spin_unlock(&ci->i_ceph_lock);
1994 mutex_unlock(&ci->i_truncate_mutex);
1996 if (wrbuffer_refs == 0)
1997 ceph_check_caps(ci, 0, NULL);
1999 wake_up_all(&ci->i_cap_wq);
2002 static void ceph_inode_work(struct work_struct *work)
2004 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
2006 struct inode *inode = &ci->vfs_inode;
2008 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) {
2009 dout("writeback %p\n", inode);
2010 filemap_fdatawrite(&inode->i_data);
2012 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask))
2013 ceph_do_invalidate_pages(inode);
2015 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask))
2016 __ceph_do_pending_vmtruncate(inode);
2024 static const struct inode_operations ceph_symlink_iops = {
2025 .get_link = simple_get_link,
2026 .setattr = ceph_setattr,
2027 .getattr = ceph_getattr,
2028 .listxattr = ceph_listxattr,
2031 int __ceph_setattr(struct inode *inode, struct iattr *attr)
2033 struct ceph_inode_info *ci = ceph_inode(inode);
2034 unsigned int ia_valid = attr->ia_valid;
2035 struct ceph_mds_request *req;
2036 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
2037 struct ceph_cap_flush *prealloc_cf;
2039 int release = 0, dirtied = 0;
2042 int inode_dirty_flags = 0;
2043 bool lock_snap_rwsem = false;
2045 prealloc_cf = ceph_alloc_cap_flush();
2049 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
2052 ceph_free_cap_flush(prealloc_cf);
2053 return PTR_ERR(req);
2056 spin_lock(&ci->i_ceph_lock);
2057 issued = __ceph_caps_issued(ci, NULL);
2059 if (!ci->i_head_snapc &&
2060 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
2061 lock_snap_rwsem = true;
2062 if (!down_read_trylock(&mdsc->snap_rwsem)) {
2063 spin_unlock(&ci->i_ceph_lock);
2064 down_read(&mdsc->snap_rwsem);
2065 spin_lock(&ci->i_ceph_lock);
2066 issued = __ceph_caps_issued(ci, NULL);
2070 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
2072 if (ia_valid & ATTR_UID) {
2073 dout("setattr %p uid %d -> %d\n", inode,
2074 from_kuid(&init_user_ns, inode->i_uid),
2075 from_kuid(&init_user_ns, attr->ia_uid));
2076 if (issued & CEPH_CAP_AUTH_EXCL) {
2077 inode->i_uid = attr->ia_uid;
2078 dirtied |= CEPH_CAP_AUTH_EXCL;
2079 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2080 !uid_eq(attr->ia_uid, inode->i_uid)) {
2081 req->r_args.setattr.uid = cpu_to_le32(
2082 from_kuid(&init_user_ns, attr->ia_uid));
2083 mask |= CEPH_SETATTR_UID;
2084 release |= CEPH_CAP_AUTH_SHARED;
2087 if (ia_valid & ATTR_GID) {
2088 dout("setattr %p gid %d -> %d\n", inode,
2089 from_kgid(&init_user_ns, inode->i_gid),
2090 from_kgid(&init_user_ns, attr->ia_gid));
2091 if (issued & CEPH_CAP_AUTH_EXCL) {
2092 inode->i_gid = attr->ia_gid;
2093 dirtied |= CEPH_CAP_AUTH_EXCL;
2094 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2095 !gid_eq(attr->ia_gid, inode->i_gid)) {
2096 req->r_args.setattr.gid = cpu_to_le32(
2097 from_kgid(&init_user_ns, attr->ia_gid));
2098 mask |= CEPH_SETATTR_GID;
2099 release |= CEPH_CAP_AUTH_SHARED;
2102 if (ia_valid & ATTR_MODE) {
2103 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
2105 if (issued & CEPH_CAP_AUTH_EXCL) {
2106 inode->i_mode = attr->ia_mode;
2107 dirtied |= CEPH_CAP_AUTH_EXCL;
2108 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2109 attr->ia_mode != inode->i_mode) {
2110 inode->i_mode = attr->ia_mode;
2111 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
2112 mask |= CEPH_SETATTR_MODE;
2113 release |= CEPH_CAP_AUTH_SHARED;
2117 if (ia_valid & ATTR_ATIME) {
2118 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode,
2119 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
2120 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
2121 if (issued & CEPH_CAP_FILE_EXCL) {
2122 ci->i_time_warp_seq++;
2123 inode->i_atime = attr->ia_atime;
2124 dirtied |= CEPH_CAP_FILE_EXCL;
2125 } else if ((issued & CEPH_CAP_FILE_WR) &&
2126 timespec64_compare(&inode->i_atime,
2127 &attr->ia_atime) < 0) {
2128 inode->i_atime = attr->ia_atime;
2129 dirtied |= CEPH_CAP_FILE_WR;
2130 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2131 !timespec64_equal(&inode->i_atime, &attr->ia_atime)) {
2132 ceph_encode_timespec64(&req->r_args.setattr.atime,
2134 mask |= CEPH_SETATTR_ATIME;
2135 release |= CEPH_CAP_FILE_SHARED |
2136 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2139 if (ia_valid & ATTR_SIZE) {
2140 dout("setattr %p size %lld -> %lld\n", inode,
2141 inode->i_size, attr->ia_size);
2142 if ((issued & CEPH_CAP_FILE_EXCL) &&
2143 attr->ia_size > inode->i_size) {
2144 i_size_write(inode, attr->ia_size);
2145 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2146 ci->i_reported_size = attr->ia_size;
2147 dirtied |= CEPH_CAP_FILE_EXCL;
2148 ia_valid |= ATTR_MTIME;
2149 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2150 attr->ia_size != inode->i_size) {
2151 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2152 req->r_args.setattr.old_size =
2153 cpu_to_le64(inode->i_size);
2154 mask |= CEPH_SETATTR_SIZE;
2155 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2156 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2159 if (ia_valid & ATTR_MTIME) {
2160 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode,
2161 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
2162 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
2163 if (issued & CEPH_CAP_FILE_EXCL) {
2164 ci->i_time_warp_seq++;
2165 inode->i_mtime = attr->ia_mtime;
2166 dirtied |= CEPH_CAP_FILE_EXCL;
2167 } else if ((issued & CEPH_CAP_FILE_WR) &&
2168 timespec64_compare(&inode->i_mtime,
2169 &attr->ia_mtime) < 0) {
2170 inode->i_mtime = attr->ia_mtime;
2171 dirtied |= CEPH_CAP_FILE_WR;
2172 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2173 !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) {
2174 ceph_encode_timespec64(&req->r_args.setattr.mtime,
2176 mask |= CEPH_SETATTR_MTIME;
2177 release |= CEPH_CAP_FILE_SHARED |
2178 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2182 /* these do nothing */
2183 if (ia_valid & ATTR_CTIME) {
2184 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2185 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
2186 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode,
2187 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
2188 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2189 only ? "ctime only" : "ignored");
2192 * if kernel wants to dirty ctime but nothing else,
2193 * we need to choose a cap to dirty under, or do
2194 * a almost-no-op setattr
2196 if (issued & CEPH_CAP_AUTH_EXCL)
2197 dirtied |= CEPH_CAP_AUTH_EXCL;
2198 else if (issued & CEPH_CAP_FILE_EXCL)
2199 dirtied |= CEPH_CAP_FILE_EXCL;
2200 else if (issued & CEPH_CAP_XATTR_EXCL)
2201 dirtied |= CEPH_CAP_XATTR_EXCL;
2203 mask |= CEPH_SETATTR_CTIME;
2206 if (ia_valid & ATTR_FILE)
2207 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
2210 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2212 inode->i_ctime = attr->ia_ctime;
2216 spin_unlock(&ci->i_ceph_lock);
2217 if (lock_snap_rwsem)
2218 up_read(&mdsc->snap_rwsem);
2220 if (inode_dirty_flags)
2221 __mark_inode_dirty(inode, inode_dirty_flags);
2225 req->r_inode = inode;
2227 req->r_inode_drop = release;
2228 req->r_args.setattr.mask = cpu_to_le32(mask);
2229 req->r_num_caps = 1;
2230 req->r_stamp = attr->ia_ctime;
2231 err = ceph_mdsc_do_request(mdsc, NULL, req);
2233 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
2234 ceph_cap_string(dirtied), mask);
2236 ceph_mdsc_put_request(req);
2237 ceph_free_cap_flush(prealloc_cf);
2239 if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
2240 __ceph_do_pending_vmtruncate(inode);
2248 int ceph_setattr(struct dentry *dentry, struct iattr *attr)
2250 struct inode *inode = d_inode(dentry);
2251 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
2254 if (ceph_snap(inode) != CEPH_NOSNAP)
2257 err = setattr_prepare(dentry, attr);
2261 if ((attr->ia_valid & ATTR_SIZE) &&
2262 attr->ia_size > max(inode->i_size, fsc->max_file_size))
2265 if ((attr->ia_valid & ATTR_SIZE) &&
2266 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size))
2269 err = __ceph_setattr(inode, attr);
2271 if (err >= 0 && (attr->ia_valid & ATTR_MODE))
2272 err = posix_acl_chmod(inode, attr->ia_mode);
2278 * Verify that we have a lease on the given mask. If not,
2279 * do a getattr against an mds.
2281 int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2282 int mask, bool force)
2284 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
2285 struct ceph_mds_client *mdsc = fsc->mdsc;
2286 struct ceph_mds_request *req;
2290 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2291 dout("do_getattr inode %p SNAPDIR\n", inode);
2295 dout("do_getattr inode %p mask %s mode 0%o\n",
2296 inode, ceph_cap_string(mask), inode->i_mode);
2297 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1))
2300 mode = (mask & CEPH_STAT_RSTAT) ? USE_AUTH_MDS : USE_ANY_MDS;
2301 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode);
2303 return PTR_ERR(req);
2304 req->r_inode = inode;
2306 req->r_num_caps = 1;
2307 req->r_args.getattr.mask = cpu_to_le32(mask);
2308 req->r_locked_page = locked_page;
2309 err = ceph_mdsc_do_request(mdsc, NULL, req);
2310 if (locked_page && err == 0) {
2311 u64 inline_version = req->r_reply_info.targeti.inline_version;
2312 if (inline_version == 0) {
2313 /* the reply is supposed to contain inline data */
2315 } else if (inline_version == CEPH_INLINE_NONE) {
2318 err = req->r_reply_info.targeti.inline_len;
2321 ceph_mdsc_put_request(req);
2322 dout("do_getattr result=%d\n", err);
2328 * Check inode permissions. We verify we have a valid value for
2329 * the AUTH cap, then call the generic handler.
2331 int ceph_permission(struct inode *inode, int mask)
2335 if (mask & MAY_NOT_BLOCK)
2338 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
2341 err = generic_permission(inode, mask);
2345 /* Craft a mask of needed caps given a set of requested statx attrs. */
2346 static int statx_to_caps(u32 want)
2350 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME))
2351 mask |= CEPH_CAP_AUTH_SHARED;
2353 if (want & (STATX_NLINK|STATX_CTIME))
2354 mask |= CEPH_CAP_LINK_SHARED;
2356 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|
2358 mask |= CEPH_CAP_FILE_SHARED;
2360 if (want & (STATX_CTIME))
2361 mask |= CEPH_CAP_XATTR_SHARED;
2367 * Get all the attributes. If we have sufficient caps for the requested attrs,
2368 * then we can avoid talking to the MDS at all.
2370 int ceph_getattr(const struct path *path, struct kstat *stat,
2371 u32 request_mask, unsigned int flags)
2373 struct inode *inode = d_inode(path->dentry);
2374 struct ceph_inode_info *ci = ceph_inode(inode);
2375 u32 valid_mask = STATX_BASIC_STATS;
2378 /* Skip the getattr altogether if we're asked not to sync */
2379 if (!(flags & AT_STATX_DONT_SYNC)) {
2380 err = ceph_do_getattr(inode, statx_to_caps(request_mask),
2381 flags & AT_STATX_FORCE_SYNC);
2386 generic_fillattr(inode, stat);
2387 stat->ino = ceph_present_inode(inode);
2390 * btime on newly-allocated inodes is 0, so if this is still set to
2391 * that, then assume that it's not valid.
2393 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) {
2394 stat->btime = ci->i_btime;
2395 valid_mask |= STATX_BTIME;
2398 if (ceph_snap(inode) == CEPH_NOSNAP)
2399 stat->dev = inode->i_sb->s_dev;
2401 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0;
2403 if (S_ISDIR(inode->i_mode)) {
2404 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
2406 stat->size = ci->i_rbytes;
2408 stat->size = ci->i_files + ci->i_subdirs;
2410 stat->blksize = 65536;
2412 * Some applications rely on the number of st_nlink
2413 * value on directories to be either 0 (if unlinked)
2414 * or 2 + number of subdirectories.
2416 if (stat->nlink == 1)
2417 /* '.' + '..' + subdirs */
2418 stat->nlink = 1 + 1 + ci->i_subdirs;
2421 stat->result_mask = request_mask & valid_mask;