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>
18 #include "mds_client.h"
20 #include <linux/ceph/decode.h>
23 * Ceph inode operations
25 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
26 * setattr, etc.), xattr helpers, and helpers for assimilating
27 * metadata returned by the MDS into our cache.
29 * Also define helpers for doing asynchronous writeback, invalidation,
30 * and truncation for the benefit of those who can't afford to block
31 * (typically because they are in the message handler path).
34 static const struct inode_operations ceph_symlink_iops;
36 static void ceph_invalidate_work(struct work_struct *work);
37 static void ceph_writeback_work(struct work_struct *work);
38 static void ceph_vmtruncate_work(struct work_struct *work);
41 * find or create an inode, given the ceph ino number
43 static int ceph_set_ino_cb(struct inode *inode, void *data)
45 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
46 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
50 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
53 ino_t t = ceph_vino_to_ino(vino);
55 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
57 return ERR_PTR(-ENOMEM);
58 if (inode->i_state & I_NEW) {
59 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
60 inode, ceph_vinop(inode), (u64)inode->i_ino);
61 unlock_new_inode(inode);
64 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
70 * get/constuct snapdir inode for a given directory
72 struct inode *ceph_get_snapdir(struct inode *parent)
74 struct ceph_vino vino = {
75 .ino = ceph_ino(parent),
78 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
79 struct ceph_inode_info *ci = ceph_inode(inode);
81 BUG_ON(!S_ISDIR(parent->i_mode));
84 inode->i_mode = parent->i_mode;
85 inode->i_uid = parent->i_uid;
86 inode->i_gid = parent->i_gid;
87 inode->i_op = &ceph_snapdir_iops;
88 inode->i_fop = &ceph_snapdir_fops;
89 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
94 const struct inode_operations ceph_file_iops = {
95 .permission = ceph_permission,
96 .setattr = ceph_setattr,
97 .getattr = ceph_getattr,
98 .listxattr = ceph_listxattr,
99 .get_acl = ceph_get_acl,
100 .set_acl = ceph_set_acl,
105 * We use a 'frag tree' to keep track of the MDS's directory fragments
106 * for a given inode (usually there is just a single fragment). We
107 * need to know when a child frag is delegated to a new MDS, or when
108 * it is flagged as replicated, so we can direct our requests
113 * find/create a frag in the tree
115 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
119 struct rb_node *parent = NULL;
120 struct ceph_inode_frag *frag;
123 p = &ci->i_fragtree.rb_node;
126 frag = rb_entry(parent, struct ceph_inode_frag, node);
127 c = ceph_frag_compare(f, frag->frag);
136 frag = kmalloc(sizeof(*frag), GFP_NOFS);
138 return ERR_PTR(-ENOMEM);
145 rb_link_node(&frag->node, parent, p);
146 rb_insert_color(&frag->node, &ci->i_fragtree);
148 dout("get_or_create_frag added %llx.%llx frag %x\n",
149 ceph_vinop(&ci->vfs_inode), f);
154 * find a specific frag @f
156 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
158 struct rb_node *n = ci->i_fragtree.rb_node;
161 struct ceph_inode_frag *frag =
162 rb_entry(n, struct ceph_inode_frag, node);
163 int c = ceph_frag_compare(f, frag->frag);
175 * Choose frag containing the given value @v. If @pfrag is
176 * specified, copy the frag delegation info to the caller if
179 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
180 struct ceph_inode_frag *pfrag, int *found)
182 u32 t = ceph_frag_make(0, 0);
183 struct ceph_inode_frag *frag;
191 WARN_ON(!ceph_frag_contains_value(t, v));
192 frag = __ceph_find_frag(ci, t);
194 break; /* t is a leaf */
195 if (frag->split_by == 0) {
197 memcpy(pfrag, frag, sizeof(*pfrag));
204 nway = 1 << frag->split_by;
205 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
206 frag->split_by, nway);
207 for (i = 0; i < nway; i++) {
208 n = ceph_frag_make_child(t, frag->split_by, i);
209 if (ceph_frag_contains_value(n, v)) {
216 dout("choose_frag(%x) = %x\n", v, t);
221 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
222 struct ceph_inode_frag *pfrag, int *found)
225 mutex_lock(&ci->i_fragtree_mutex);
226 ret = __ceph_choose_frag(ci, v, pfrag, found);
227 mutex_unlock(&ci->i_fragtree_mutex);
232 * Process dirfrag (delegation) info from the mds. Include leaf
233 * fragment in tree ONLY if ndist > 0. Otherwise, only
234 * branches/splits are included in i_fragtree)
236 static int ceph_fill_dirfrag(struct inode *inode,
237 struct ceph_mds_reply_dirfrag *dirinfo)
239 struct ceph_inode_info *ci = ceph_inode(inode);
240 struct ceph_inode_frag *frag;
241 u32 id = le32_to_cpu(dirinfo->frag);
242 int mds = le32_to_cpu(dirinfo->auth);
243 int ndist = le32_to_cpu(dirinfo->ndist);
248 spin_lock(&ci->i_ceph_lock);
250 diri_auth = ci->i_auth_cap->mds;
251 spin_unlock(&ci->i_ceph_lock);
253 if (mds == -1) /* CDIR_AUTH_PARENT */
256 mutex_lock(&ci->i_fragtree_mutex);
257 if (ndist == 0 && mds == diri_auth) {
258 /* no delegation info needed. */
259 frag = __ceph_find_frag(ci, id);
262 if (frag->split_by == 0) {
263 /* tree leaf, remove */
264 dout("fill_dirfrag removed %llx.%llx frag %x"
265 " (no ref)\n", ceph_vinop(inode), id);
266 rb_erase(&frag->node, &ci->i_fragtree);
269 /* tree branch, keep and clear */
270 dout("fill_dirfrag cleared %llx.%llx frag %x"
271 " referral\n", ceph_vinop(inode), id);
279 /* find/add this frag to store mds delegation info */
280 frag = __get_or_create_frag(ci, id);
282 /* this is not the end of the world; we can continue
283 with bad/inaccurate delegation info */
284 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
285 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
291 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
292 for (i = 0; i < frag->ndist; i++)
293 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
294 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
295 ceph_vinop(inode), frag->frag, frag->ndist);
298 mutex_unlock(&ci->i_fragtree_mutex);
302 static int frag_tree_split_cmp(const void *l, const void *r)
304 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
305 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
306 return ceph_frag_compare(le32_to_cpu(ls->frag),
307 le32_to_cpu(rs->frag));
310 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
313 return f == ceph_frag_make(0, 0);
314 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
316 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
319 static int ceph_fill_fragtree(struct inode *inode,
320 struct ceph_frag_tree_head *fragtree,
321 struct ceph_mds_reply_dirfrag *dirinfo)
323 struct ceph_inode_info *ci = ceph_inode(inode);
324 struct ceph_inode_frag *frag, *prev_frag = NULL;
325 struct rb_node *rb_node;
326 unsigned i, split_by, nsplits;
330 mutex_lock(&ci->i_fragtree_mutex);
331 nsplits = le32_to_cpu(fragtree->nsplits);
332 if (nsplits != ci->i_fragtree_nsplits) {
334 } else if (nsplits) {
335 i = prandom_u32() % nsplits;
336 id = le32_to_cpu(fragtree->splits[i].frag);
337 if (!__ceph_find_frag(ci, id))
339 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
340 rb_node = rb_first(&ci->i_fragtree);
341 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
342 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
345 if (!update && dirinfo) {
346 id = le32_to_cpu(dirinfo->frag);
347 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
354 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
355 frag_tree_split_cmp, NULL);
358 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
359 rb_node = rb_first(&ci->i_fragtree);
360 for (i = 0; i < nsplits; i++) {
361 id = le32_to_cpu(fragtree->splits[i].frag);
362 split_by = le32_to_cpu(fragtree->splits[i].by);
363 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
364 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
365 "frag %x split by %d\n", ceph_vinop(inode),
366 i, nsplits, id, split_by);
371 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
372 if (ceph_frag_compare(frag->frag, id) >= 0) {
373 if (frag->frag != id)
376 rb_node = rb_next(rb_node);
379 rb_node = rb_next(rb_node);
380 /* delete stale split/leaf node */
381 if (frag->split_by > 0 ||
382 !is_frag_child(frag->frag, prev_frag)) {
383 rb_erase(&frag->node, &ci->i_fragtree);
384 if (frag->split_by > 0)
385 ci->i_fragtree_nsplits--;
391 frag = __get_or_create_frag(ci, id);
395 if (frag->split_by == 0)
396 ci->i_fragtree_nsplits++;
397 frag->split_by = split_by;
398 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
402 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
403 rb_node = rb_next(rb_node);
404 /* delete stale split/leaf node */
405 if (frag->split_by > 0 ||
406 !is_frag_child(frag->frag, prev_frag)) {
407 rb_erase(&frag->node, &ci->i_fragtree);
408 if (frag->split_by > 0)
409 ci->i_fragtree_nsplits--;
414 mutex_unlock(&ci->i_fragtree_mutex);
419 * initialize a newly allocated inode.
421 struct inode *ceph_alloc_inode(struct super_block *sb)
423 struct ceph_inode_info *ci;
426 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
430 dout("alloc_inode %p\n", &ci->vfs_inode);
432 spin_lock_init(&ci->i_ceph_lock);
435 ci->i_inline_version = 0;
436 ci->i_time_warp_seq = 0;
437 ci->i_ceph_flags = 0;
438 atomic64_set(&ci->i_ordered_count, 1);
439 atomic64_set(&ci->i_release_count, 1);
440 atomic64_set(&ci->i_complete_seq[0], 0);
441 atomic64_set(&ci->i_complete_seq[1], 0);
442 ci->i_symlink = NULL;
444 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
445 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
447 ci->i_fragtree = RB_ROOT;
448 mutex_init(&ci->i_fragtree_mutex);
450 ci->i_xattrs.blob = NULL;
451 ci->i_xattrs.prealloc_blob = NULL;
452 ci->i_xattrs.dirty = false;
453 ci->i_xattrs.index = RB_ROOT;
454 ci->i_xattrs.count = 0;
455 ci->i_xattrs.names_size = 0;
456 ci->i_xattrs.vals_size = 0;
457 ci->i_xattrs.version = 0;
458 ci->i_xattrs.index_version = 0;
460 ci->i_caps = RB_ROOT;
461 ci->i_auth_cap = NULL;
462 ci->i_dirty_caps = 0;
463 ci->i_flushing_caps = 0;
464 INIT_LIST_HEAD(&ci->i_dirty_item);
465 INIT_LIST_HEAD(&ci->i_flushing_item);
466 ci->i_prealloc_cap_flush = NULL;
467 INIT_LIST_HEAD(&ci->i_cap_flush_list);
468 init_waitqueue_head(&ci->i_cap_wq);
469 ci->i_hold_caps_min = 0;
470 ci->i_hold_caps_max = 0;
471 INIT_LIST_HEAD(&ci->i_cap_delay_list);
472 INIT_LIST_HEAD(&ci->i_cap_snaps);
473 ci->i_head_snapc = NULL;
476 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
477 ci->i_nr_by_mode[i] = 0;
479 mutex_init(&ci->i_truncate_mutex);
480 ci->i_truncate_seq = 0;
481 ci->i_truncate_size = 0;
482 ci->i_truncate_pending = 0;
485 ci->i_reported_size = 0;
486 ci->i_wanted_max_size = 0;
487 ci->i_requested_max_size = 0;
491 ci->i_rdcache_ref = 0;
494 ci->i_wrbuffer_ref = 0;
495 ci->i_wrbuffer_ref_head = 0;
496 ci->i_shared_gen = 0;
497 ci->i_rdcache_gen = 0;
498 ci->i_rdcache_revoking = 0;
500 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
501 INIT_LIST_HEAD(&ci->i_unsafe_iops);
502 spin_lock_init(&ci->i_unsafe_lock);
504 ci->i_snap_realm = NULL;
505 INIT_LIST_HEAD(&ci->i_snap_realm_item);
506 INIT_LIST_HEAD(&ci->i_snap_flush_item);
508 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
509 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
511 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
513 ceph_fscache_inode_init(ci);
515 return &ci->vfs_inode;
518 static void ceph_i_callback(struct rcu_head *head)
520 struct inode *inode = container_of(head, struct inode, i_rcu);
521 struct ceph_inode_info *ci = ceph_inode(inode);
523 kfree(ci->i_symlink);
524 kmem_cache_free(ceph_inode_cachep, ci);
527 void ceph_destroy_inode(struct inode *inode)
529 struct ceph_inode_info *ci = ceph_inode(inode);
530 struct ceph_inode_frag *frag;
533 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
535 ceph_fscache_unregister_inode_cookie(ci);
537 ceph_queue_caps_release(inode);
540 * we may still have a snap_realm reference if there are stray
541 * caps in i_snap_caps.
543 if (ci->i_snap_realm) {
544 struct ceph_mds_client *mdsc =
545 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
546 struct ceph_snap_realm *realm = ci->i_snap_realm;
548 dout(" dropping residual ref to snap realm %p\n", realm);
549 spin_lock(&realm->inodes_with_caps_lock);
550 list_del_init(&ci->i_snap_realm_item);
551 spin_unlock(&realm->inodes_with_caps_lock);
552 ceph_put_snap_realm(mdsc, realm);
555 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
556 frag = rb_entry(n, struct ceph_inode_frag, node);
557 rb_erase(n, &ci->i_fragtree);
560 ci->i_fragtree_nsplits = 0;
562 __ceph_destroy_xattrs(ci);
563 if (ci->i_xattrs.blob)
564 ceph_buffer_put(ci->i_xattrs.blob);
565 if (ci->i_xattrs.prealloc_blob)
566 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
568 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
570 call_rcu(&inode->i_rcu, ceph_i_callback);
573 int ceph_drop_inode(struct inode *inode)
576 * Positve dentry and corresponding inode are always accompanied
577 * in MDS reply. So no need to keep inode in the cache after
578 * dropping all its aliases.
583 static inline blkcnt_t calc_inode_blocks(u64 size)
585 return (size + (1<<9) - 1) >> 9;
589 * Helpers to fill in size, ctime, mtime, and atime. We have to be
590 * careful because either the client or MDS may have more up to date
591 * info, depending on which capabilities are held, and whether
592 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
593 * and size are monotonically increasing, except when utimes() or
594 * truncate() increments the corresponding _seq values.)
596 int ceph_fill_file_size(struct inode *inode, int issued,
597 u32 truncate_seq, u64 truncate_size, u64 size)
599 struct ceph_inode_info *ci = ceph_inode(inode);
602 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
603 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
604 dout("size %lld -> %llu\n", inode->i_size, size);
605 if (size > 0 && S_ISDIR(inode->i_mode)) {
606 pr_err("fill_file_size non-zero size for directory\n");
609 i_size_write(inode, size);
610 inode->i_blocks = calc_inode_blocks(size);
611 ci->i_reported_size = size;
612 if (truncate_seq != ci->i_truncate_seq) {
613 dout("truncate_seq %u -> %u\n",
614 ci->i_truncate_seq, truncate_seq);
615 ci->i_truncate_seq = truncate_seq;
617 /* the MDS should have revoked these caps */
618 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
621 CEPH_CAP_FILE_LAZYIO));
623 * If we hold relevant caps, or in the case where we're
624 * not the only client referencing this file and we
625 * don't hold those caps, then we need to check whether
626 * the file is either opened or mmaped
628 if ((issued & (CEPH_CAP_FILE_CACHE|
629 CEPH_CAP_FILE_BUFFER)) ||
630 mapping_mapped(inode->i_mapping) ||
631 __ceph_caps_file_wanted(ci)) {
632 ci->i_truncate_pending++;
637 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
638 ci->i_truncate_size != truncate_size) {
639 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
641 ci->i_truncate_size = truncate_size;
645 ceph_fscache_invalidate(inode);
650 void ceph_fill_file_time(struct inode *inode, int issued,
651 u64 time_warp_seq, struct timespec *ctime,
652 struct timespec *mtime, struct timespec *atime)
654 struct ceph_inode_info *ci = ceph_inode(inode);
657 if (issued & (CEPH_CAP_FILE_EXCL|
659 CEPH_CAP_FILE_BUFFER|
661 CEPH_CAP_XATTR_EXCL)) {
662 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
663 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
664 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
665 ctime->tv_sec, ctime->tv_nsec);
666 inode->i_ctime = *ctime;
668 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
669 /* the MDS did a utimes() */
670 dout("mtime %ld.%09ld -> %ld.%09ld "
672 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
673 mtime->tv_sec, mtime->tv_nsec,
674 ci->i_time_warp_seq, (int)time_warp_seq);
676 inode->i_mtime = *mtime;
677 inode->i_atime = *atime;
678 ci->i_time_warp_seq = time_warp_seq;
679 } else if (time_warp_seq == ci->i_time_warp_seq) {
680 /* nobody did utimes(); take the max */
681 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
682 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
683 inode->i_mtime.tv_sec,
684 inode->i_mtime.tv_nsec,
685 mtime->tv_sec, mtime->tv_nsec);
686 inode->i_mtime = *mtime;
688 if (timespec_compare(atime, &inode->i_atime) > 0) {
689 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
690 inode->i_atime.tv_sec,
691 inode->i_atime.tv_nsec,
692 atime->tv_sec, atime->tv_nsec);
693 inode->i_atime = *atime;
695 } else if (issued & CEPH_CAP_FILE_EXCL) {
696 /* we did a utimes(); ignore mds values */
701 /* we have no write|excl caps; whatever the MDS says is true */
702 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
703 inode->i_ctime = *ctime;
704 inode->i_mtime = *mtime;
705 inode->i_atime = *atime;
706 ci->i_time_warp_seq = time_warp_seq;
711 if (warn) /* time_warp_seq shouldn't go backwards */
712 dout("%p mds time_warp_seq %llu < %u\n",
713 inode, time_warp_seq, ci->i_time_warp_seq);
717 * Populate an inode based on info from mds. May be called on new or
720 static int fill_inode(struct inode *inode, struct page *locked_page,
721 struct ceph_mds_reply_info_in *iinfo,
722 struct ceph_mds_reply_dirfrag *dirinfo,
723 struct ceph_mds_session *session,
724 unsigned long ttl_from, int cap_fmode,
725 struct ceph_cap_reservation *caps_reservation)
727 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
728 struct ceph_mds_reply_inode *info = iinfo->in;
729 struct ceph_inode_info *ci = ceph_inode(inode);
730 int issued = 0, implemented, new_issued;
731 struct timespec mtime, atime, ctime;
732 struct ceph_buffer *xattr_blob = NULL;
733 struct ceph_buffer *old_blob = NULL;
734 struct ceph_string *pool_ns = NULL;
735 struct ceph_cap *new_cap = NULL;
738 bool queue_trunc = false;
739 bool new_version = false;
740 bool fill_inline = false;
742 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
743 inode, ceph_vinop(inode), le64_to_cpu(info->version),
746 /* prealloc new cap struct */
747 if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP)
748 new_cap = ceph_get_cap(mdsc, caps_reservation);
751 * prealloc xattr data, if it looks like we'll need it. only
752 * if len > 4 (meaning there are actually xattrs; the first 4
753 * bytes are the xattr count).
755 if (iinfo->xattr_len > 4) {
756 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
758 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
762 if (iinfo->pool_ns_len > 0)
763 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
766 spin_lock(&ci->i_ceph_lock);
769 * provided version will be odd if inode value is projected,
770 * even if stable. skip the update if we have newer stable
771 * info (ours>=theirs, e.g. due to racing mds replies), unless
772 * we are getting projected (unstable) info (in which case the
773 * version is odd, and we want ours>theirs).
779 if (ci->i_version == 0 ||
780 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
781 le64_to_cpu(info->version) > (ci->i_version & ~1)))
784 issued = __ceph_caps_issued(ci, &implemented);
785 issued |= implemented | __ceph_caps_dirty(ci);
786 new_issued = ~issued & le32_to_cpu(info->cap.caps);
789 ci->i_version = le64_to_cpu(info->version);
791 inode->i_rdev = le32_to_cpu(info->rdev);
792 /* directories have fl_stripe_unit set to zero */
793 if (le32_to_cpu(info->layout.fl_stripe_unit))
795 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
797 inode->i_blkbits = CEPH_BLOCK_SHIFT;
799 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
800 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
801 inode->i_mode = le32_to_cpu(info->mode);
802 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
803 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
804 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
805 from_kuid(&init_user_ns, inode->i_uid),
806 from_kgid(&init_user_ns, inode->i_gid));
809 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
810 (issued & CEPH_CAP_LINK_EXCL) == 0)
811 set_nlink(inode, le32_to_cpu(info->nlink));
813 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
814 /* be careful with mtime, atime, size */
815 ceph_decode_timespec(&atime, &info->atime);
816 ceph_decode_timespec(&mtime, &info->mtime);
817 ceph_decode_timespec(&ctime, &info->ctime);
818 ceph_fill_file_time(inode, issued,
819 le32_to_cpu(info->time_warp_seq),
820 &ctime, &mtime, &atime);
824 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
825 s64 old_pool = ci->i_layout.pool_id;
826 struct ceph_string *old_ns;
828 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
829 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
830 lockdep_is_held(&ci->i_ceph_lock));
831 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
833 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
834 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
838 queue_trunc = ceph_fill_file_size(inode, issued,
839 le32_to_cpu(info->truncate_seq),
840 le64_to_cpu(info->truncate_size),
841 le64_to_cpu(info->size));
842 /* only update max_size on auth cap */
843 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
844 ci->i_max_size != le64_to_cpu(info->max_size)) {
845 dout("max_size %lld -> %llu\n", ci->i_max_size,
846 le64_to_cpu(info->max_size));
847 ci->i_max_size = le64_to_cpu(info->max_size);
852 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
853 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
854 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
855 if (ci->i_xattrs.blob)
856 old_blob = ci->i_xattrs.blob;
857 ci->i_xattrs.blob = xattr_blob;
859 memcpy(ci->i_xattrs.blob->vec.iov_base,
860 iinfo->xattr_data, iinfo->xattr_len);
861 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
862 ceph_forget_all_cached_acls(inode);
866 inode->i_mapping->a_ops = &ceph_aops;
868 switch (inode->i_mode & S_IFMT) {
873 init_special_inode(inode, inode->i_mode, inode->i_rdev);
874 inode->i_op = &ceph_file_iops;
877 inode->i_op = &ceph_file_iops;
878 inode->i_fop = &ceph_file_fops;
881 inode->i_op = &ceph_symlink_iops;
882 if (!ci->i_symlink) {
883 u32 symlen = iinfo->symlink_len;
886 spin_unlock(&ci->i_ceph_lock);
888 if (symlen != i_size_read(inode)) {
889 pr_err("fill_inode %llx.%llx BAD symlink "
890 "size %lld\n", ceph_vinop(inode),
892 i_size_write(inode, symlen);
893 inode->i_blocks = calc_inode_blocks(symlen);
897 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
901 spin_lock(&ci->i_ceph_lock);
905 kfree(sym); /* lost a race */
907 inode->i_link = ci->i_symlink;
910 inode->i_op = &ceph_dir_iops;
911 inode->i_fop = &ceph_dir_fops;
913 ci->i_dir_layout = iinfo->dir_layout;
915 ci->i_files = le64_to_cpu(info->files);
916 ci->i_subdirs = le64_to_cpu(info->subdirs);
917 ci->i_rbytes = le64_to_cpu(info->rbytes);
918 ci->i_rfiles = le64_to_cpu(info->rfiles);
919 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
920 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
923 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
924 ceph_vinop(inode), inode->i_mode);
927 /* were we issued a capability? */
928 if (info->cap.caps) {
929 if (ceph_snap(inode) == CEPH_NOSNAP) {
930 unsigned caps = le32_to_cpu(info->cap.caps);
931 ceph_add_cap(inode, session,
932 le64_to_cpu(info->cap.cap_id),
934 le32_to_cpu(info->cap.wanted),
935 le32_to_cpu(info->cap.seq),
936 le32_to_cpu(info->cap.mseq),
937 le64_to_cpu(info->cap.realm),
938 info->cap.flags, &new_cap);
940 /* set dir completion flag? */
941 if (S_ISDIR(inode->i_mode) &&
942 ci->i_files == 0 && ci->i_subdirs == 0 &&
943 (caps & CEPH_CAP_FILE_SHARED) &&
944 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
945 !__ceph_dir_is_complete(ci)) {
946 dout(" marking %p complete (empty)\n", inode);
947 i_size_write(inode, 0);
948 __ceph_dir_set_complete(ci,
949 atomic64_read(&ci->i_release_count),
950 atomic64_read(&ci->i_ordered_count));
955 dout(" %p got snap_caps %s\n", inode,
956 ceph_cap_string(le32_to_cpu(info->cap.caps)));
957 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
959 __ceph_get_fmode(ci, cap_fmode);
961 } else if (cap_fmode >= 0) {
962 pr_warn("mds issued no caps on %llx.%llx\n",
964 __ceph_get_fmode(ci, cap_fmode);
967 if (iinfo->inline_version > 0 &&
968 iinfo->inline_version >= ci->i_inline_version) {
969 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
970 ci->i_inline_version = iinfo->inline_version;
971 if (ci->i_inline_version != CEPH_INLINE_NONE &&
973 (le32_to_cpu(info->cap.caps) & cache_caps)))
977 spin_unlock(&ci->i_ceph_lock);
980 ceph_fill_inline_data(inode, locked_page,
981 iinfo->inline_data, iinfo->inline_len);
984 wake_up_all(&ci->i_cap_wq);
986 /* queue truncate if we saw i_size decrease */
988 ceph_queue_vmtruncate(inode);
990 /* populate frag tree */
991 if (S_ISDIR(inode->i_mode))
992 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
994 /* update delegation info? */
996 ceph_fill_dirfrag(inode, dirinfo);
1001 ceph_put_cap(mdsc, new_cap);
1002 ceph_buffer_put(old_blob);
1003 ceph_buffer_put(xattr_blob);
1004 ceph_put_string(pool_ns);
1009 * caller should hold session s_mutex.
1011 static void update_dentry_lease(struct dentry *dentry,
1012 struct ceph_mds_reply_lease *lease,
1013 struct ceph_mds_session *session,
1014 unsigned long from_time,
1015 struct ceph_vino *tgt_vino,
1016 struct ceph_vino *dir_vino)
1018 struct ceph_dentry_info *di = ceph_dentry(dentry);
1019 long unsigned duration = le32_to_cpu(lease->duration_ms);
1020 long unsigned ttl = from_time + (duration * HZ) / 1000;
1021 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
1023 struct ceph_mds_session *old_lease_session = NULL;
1026 * Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that
1027 * we expect a negative dentry.
1029 if (!tgt_vino && d_really_is_positive(dentry))
1032 if (tgt_vino && (d_really_is_negative(dentry) ||
1033 !ceph_ino_compare(d_inode(dentry), tgt_vino)))
1036 spin_lock(&dentry->d_lock);
1037 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1038 dentry, duration, ttl);
1040 dir = d_inode(dentry->d_parent);
1042 /* make sure parent matches dir_vino */
1043 if (!ceph_ino_compare(dir, dir_vino))
1046 /* only track leases on regular dentries */
1047 if (ceph_snap(dir) != CEPH_NOSNAP)
1050 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
1055 if (di->lease_gen == session->s_cap_gen &&
1056 time_before(ttl, di->time))
1057 goto out_unlock; /* we already have a newer lease. */
1059 if (di->lease_session && di->lease_session != session) {
1060 old_lease_session = di->lease_session;
1061 di->lease_session = NULL;
1064 ceph_dentry_lru_touch(dentry);
1066 if (!di->lease_session)
1067 di->lease_session = ceph_get_mds_session(session);
1068 di->lease_gen = session->s_cap_gen;
1069 di->lease_seq = le32_to_cpu(lease->seq);
1070 di->lease_renew_after = half_ttl;
1071 di->lease_renew_from = 0;
1074 spin_unlock(&dentry->d_lock);
1075 if (old_lease_session)
1076 ceph_put_mds_session(old_lease_session);
1080 * splice a dentry to an inode.
1081 * caller must hold directory i_mutex for this to be safe.
1083 static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
1085 struct dentry *realdn;
1087 BUG_ON(d_inode(dn));
1089 /* dn must be unhashed */
1090 if (!d_unhashed(dn))
1092 realdn = d_splice_alias(in, dn);
1093 if (IS_ERR(realdn)) {
1094 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1095 PTR_ERR(realdn), dn, in, ceph_vinop(in));
1098 * Caller should release 'dn' in the case of error.
1099 * If 'req->r_dentry' is passed to this function,
1100 * caller should leave 'req->r_dentry' untouched.
1103 } else if (realdn) {
1104 dout("dn %p (%d) spliced with %p (%d) "
1105 "inode %p ino %llx.%llx\n",
1107 realdn, d_count(realdn),
1108 d_inode(realdn), ceph_vinop(d_inode(realdn)));
1112 BUG_ON(!ceph_dentry(dn));
1113 dout("dn %p attached to %p ino %llx.%llx\n",
1114 dn, d_inode(dn), ceph_vinop(d_inode(dn)));
1121 * Incorporate results into the local cache. This is either just
1122 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1125 * A reply may contain
1126 * a directory inode along with a dentry.
1127 * and/or a target inode
1129 * Called with snap_rwsem (read).
1131 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
1133 struct ceph_mds_session *session = req->r_session;
1134 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1135 struct inode *in = NULL;
1136 struct ceph_vino tvino, dvino;
1137 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1140 dout("fill_trace %p is_dentry %d is_target %d\n", req,
1141 rinfo->head->is_dentry, rinfo->head->is_target);
1143 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1144 dout("fill_trace reply is empty!\n");
1145 if (rinfo->head->result == 0 && req->r_parent)
1146 ceph_invalidate_dir_request(req);
1150 if (rinfo->head->is_dentry) {
1151 struct inode *dir = req->r_parent;
1154 err = fill_inode(dir, NULL,
1155 &rinfo->diri, rinfo->dirfrag,
1156 session, req->r_request_started, -1,
1157 &req->r_caps_reservation);
1164 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
1166 struct dentry *dn, *parent;
1168 BUG_ON(!rinfo->head->is_target);
1169 BUG_ON(req->r_dentry);
1171 parent = d_find_any_alias(dir);
1174 dname.name = rinfo->dname;
1175 dname.len = rinfo->dname_len;
1176 dname.hash = full_name_hash(parent, dname.name, dname.len);
1177 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1178 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1180 dn = d_lookup(parent, &dname);
1181 dout("d_lookup on parent=%p name=%.*s got %p\n",
1182 parent, dname.len, dname.name, dn);
1185 dn = d_alloc(parent, &dname);
1186 dout("d_alloc %p '%.*s' = %p\n", parent,
1187 dname.len, dname.name, dn);
1194 } else if (d_really_is_positive(dn) &&
1195 (ceph_ino(d_inode(dn)) != tvino.ino ||
1196 ceph_snap(d_inode(dn)) != tvino.snap)) {
1197 dout(" dn %p points to wrong inode %p\n",
1209 if (rinfo->head->is_target) {
1210 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1211 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1213 in = ceph_get_inode(sb, tvino);
1218 req->r_target_inode = in;
1220 err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
1221 session, req->r_request_started,
1222 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1223 rinfo->head->result == 0) ? req->r_fmode : -1,
1224 &req->r_caps_reservation);
1226 pr_err("fill_inode badness %p %llx.%llx\n",
1227 in, ceph_vinop(in));
1233 * ignore null lease/binding on snapdir ENOENT, or else we
1234 * will have trouble splicing in the virtual snapdir later
1236 if (rinfo->head->is_dentry &&
1237 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1238 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1239 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1240 fsc->mount_options->snapdir_name,
1241 req->r_dentry->d_name.len))) {
1243 * lookup link rename : null -> possibly existing inode
1244 * mknod symlink mkdir : null -> new inode
1245 * unlink : linked -> null
1247 struct inode *dir = req->r_parent;
1248 struct dentry *dn = req->r_dentry;
1249 bool have_dir_cap, have_lease;
1253 BUG_ON(d_inode(dn->d_parent) != dir);
1255 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1256 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1258 BUG_ON(ceph_ino(dir) != dvino.ino);
1259 BUG_ON(ceph_snap(dir) != dvino.snap);
1261 /* do we have a lease on the whole dir? */
1263 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1264 CEPH_CAP_FILE_SHARED);
1266 /* do we have a dn lease? */
1267 have_lease = have_dir_cap ||
1268 le32_to_cpu(rinfo->dlease->duration_ms);
1270 dout("fill_trace no dentry lease or dir cap\n");
1273 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1274 struct inode *olddir = req->r_old_dentry_dir;
1277 dout(" src %p '%pd' dst %p '%pd'\n",
1281 dout("fill_trace doing d_move %p -> %p\n",
1282 req->r_old_dentry, dn);
1284 /* d_move screws up sibling dentries' offsets */
1285 ceph_dir_clear_ordered(dir);
1286 ceph_dir_clear_ordered(olddir);
1288 d_move(req->r_old_dentry, dn);
1289 dout(" src %p '%pd' dst %p '%pd'\n",
1294 /* ensure target dentry is invalidated, despite
1295 rehashing bug in vfs_rename_dir */
1296 ceph_invalidate_dentry_lease(dn);
1298 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1299 ceph_dentry(req->r_old_dentry)->offset);
1301 dn = req->r_old_dentry; /* use old_dentry */
1305 if (!rinfo->head->is_target) {
1306 dout("fill_trace null dentry\n");
1307 if (d_really_is_positive(dn)) {
1308 ceph_dir_clear_ordered(dir);
1309 dout("d_delete %p\n", dn);
1311 } else if (have_lease) {
1314 update_dentry_lease(dn, rinfo->dlease,
1316 req->r_request_started,
1322 /* attach proper inode */
1323 if (d_really_is_negative(dn)) {
1324 ceph_dir_clear_ordered(dir);
1326 dn = splice_dentry(dn, in);
1331 req->r_dentry = dn; /* may have spliced */
1332 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
1333 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1334 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1341 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1342 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1343 update_dentry_lease(dn, rinfo->dlease, session,
1344 req->r_request_started,
1347 dout(" final dn %p\n", dn);
1348 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1349 req->r_op == CEPH_MDS_OP_MKSNAP) &&
1350 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1351 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1352 struct dentry *dn = req->r_dentry;
1353 struct inode *dir = req->r_parent;
1355 /* fill out a snapdir LOOKUPSNAP dentry */
1358 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
1359 dout(" linking snapped dir %p to dn %p\n", in, dn);
1360 ceph_dir_clear_ordered(dir);
1362 dn = splice_dentry(dn, in);
1367 req->r_dentry = dn; /* may have spliced */
1368 } else if (rinfo->head->is_dentry) {
1369 struct ceph_vino *ptvino = NULL;
1371 if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) ||
1372 le32_to_cpu(rinfo->dlease->duration_ms)) {
1373 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1374 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1376 if (rinfo->head->is_target) {
1377 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1378 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1382 update_dentry_lease(req->r_dentry, rinfo->dlease,
1383 session, req->r_request_started, ptvino,
1386 dout("%s: no dentry lease or dir cap\n", __func__);
1390 dout("fill_trace done err=%d\n", err);
1395 * Prepopulate our cache with readdir results, leases, etc.
1397 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1398 struct ceph_mds_session *session)
1400 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1403 for (i = 0; i < rinfo->dir_nr; i++) {
1404 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1405 struct ceph_vino vino;
1409 vino.ino = le64_to_cpu(rde->inode.in->ino);
1410 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1412 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1415 dout("new_inode badness got %d\n", err);
1418 rc = fill_inode(in, NULL, &rde->inode, NULL, session,
1419 req->r_request_started, -1,
1420 &req->r_caps_reservation);
1422 pr_err("fill_inode badness on %p got %d\n", in, rc);
1431 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1435 put_page(ctl->page);
1440 static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1441 struct ceph_readdir_cache_control *ctl,
1442 struct ceph_mds_request *req)
1444 struct ceph_inode_info *ci = ceph_inode(dir);
1445 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
1446 unsigned idx = ctl->index % nsize;
1447 pgoff_t pgoff = ctl->index / nsize;
1449 if (!ctl->page || pgoff != page_index(ctl->page)) {
1450 ceph_readdir_cache_release(ctl);
1452 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1454 ctl->page = find_lock_page(&dir->i_data, pgoff);
1457 return idx == 0 ? -ENOMEM : 0;
1459 /* reading/filling the cache are serialized by
1460 * i_mutex, no need to use page lock */
1461 unlock_page(ctl->page);
1462 ctl->dentries = kmap(ctl->page);
1464 memset(ctl->dentries, 0, PAGE_SIZE);
1467 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1468 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1469 dout("readdir cache dn %p idx %d\n", dn, ctl->index);
1470 ctl->dentries[idx] = dn;
1473 dout("disable readdir cache\n");
1479 int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1480 struct ceph_mds_session *session)
1482 struct dentry *parent = req->r_dentry;
1483 struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
1484 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1488 int err = 0, skipped = 0, ret, i;
1489 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1490 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1493 struct ceph_readdir_cache_control cache_ctl = {};
1495 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
1496 return readdir_prepopulate_inodes_only(req, session);
1498 if (rinfo->hash_order) {
1500 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1502 strlen(req->r_path2));
1503 last_hash = ceph_frag_value(last_hash);
1504 } else if (rinfo->offset_hash) {
1505 /* mds understands offset_hash */
1506 WARN_ON_ONCE(req->r_readdir_offset != 2);
1507 last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
1511 if (rinfo->dir_dir &&
1512 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1513 dout("readdir_prepopulate got new frag %x -> %x\n",
1514 frag, le32_to_cpu(rinfo->dir_dir->frag));
1515 frag = le32_to_cpu(rinfo->dir_dir->frag);
1516 if (!rinfo->hash_order)
1517 req->r_readdir_offset = 2;
1520 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1521 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1522 rinfo->dir_nr, parent);
1524 dout("readdir_prepopulate %d items under dn %p\n",
1525 rinfo->dir_nr, parent);
1527 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
1529 if (ceph_frag_is_leftmost(frag) &&
1530 req->r_readdir_offset == 2 &&
1531 !(rinfo->hash_order && last_hash)) {
1532 /* note dir version at start of readdir so we can
1533 * tell if any dentries get dropped */
1534 req->r_dir_release_cnt =
1535 atomic64_read(&ci->i_release_count);
1536 req->r_dir_ordered_cnt =
1537 atomic64_read(&ci->i_ordered_count);
1538 req->r_readdir_cache_idx = 0;
1542 cache_ctl.index = req->r_readdir_cache_idx;
1543 fpos_offset = req->r_readdir_offset;
1545 /* FIXME: release caps/leases if error occurs */
1546 for (i = 0; i < rinfo->dir_nr; i++) {
1547 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1548 struct ceph_vino tvino, dvino;
1550 dname.name = rde->name;
1551 dname.len = rde->name_len;
1552 dname.hash = full_name_hash(parent, dname.name, dname.len);
1554 tvino.ino = le64_to_cpu(rde->inode.in->ino);
1555 tvino.snap = le64_to_cpu(rde->inode.in->snapid);
1557 if (rinfo->hash_order) {
1558 u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1559 rde->name, rde->name_len);
1560 hash = ceph_frag_value(hash);
1561 if (hash != last_hash)
1564 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1566 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1570 dn = d_lookup(parent, &dname);
1571 dout("d_lookup on parent=%p name=%.*s got %p\n",
1572 parent, dname.len, dname.name, dn);
1575 dn = d_alloc(parent, &dname);
1576 dout("d_alloc %p '%.*s' = %p\n", parent,
1577 dname.len, dname.name, dn);
1579 dout("d_alloc badness\n");
1583 } else if (d_really_is_positive(dn) &&
1584 (ceph_ino(d_inode(dn)) != tvino.ino ||
1585 ceph_snap(d_inode(dn)) != tvino.snap)) {
1586 dout(" dn %p points to wrong inode %p\n",
1594 if (d_really_is_positive(dn)) {
1597 in = ceph_get_inode(parent->d_sb, tvino);
1599 dout("new_inode badness\n");
1607 ret = fill_inode(in, NULL, &rde->inode, NULL, session,
1608 req->r_request_started, -1,
1609 &req->r_caps_reservation);
1611 pr_err("fill_inode badness on %p\n", in);
1612 if (d_really_is_negative(dn))
1619 if (d_really_is_negative(dn)) {
1620 struct dentry *realdn;
1622 if (ceph_security_xattr_deadlock(in)) {
1623 dout(" skip splicing dn %p to inode %p"
1624 " (security xattr deadlock)\n", dn, in);
1630 realdn = splice_dentry(dn, in);
1631 if (IS_ERR(realdn)) {
1632 err = PTR_ERR(realdn);
1639 ceph_dentry(dn)->offset = rde->offset;
1641 dvino = ceph_vino(d_inode(parent));
1642 update_dentry_lease(dn, rde->lease, req->r_session,
1643 req->r_request_started, &tvino, &dvino);
1645 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
1646 ret = fill_readdir_cache(d_inode(parent), dn,
1656 if (err == 0 && skipped == 0) {
1657 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
1658 req->r_readdir_cache_idx = cache_ctl.index;
1660 ceph_readdir_cache_release(&cache_ctl);
1661 dout("readdir_prepopulate done\n");
1665 bool ceph_inode_set_size(struct inode *inode, loff_t size)
1667 struct ceph_inode_info *ci = ceph_inode(inode);
1670 spin_lock(&ci->i_ceph_lock);
1671 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1672 i_size_write(inode, size);
1673 inode->i_blocks = calc_inode_blocks(size);
1675 ret = __ceph_should_report_size(ci);
1677 spin_unlock(&ci->i_ceph_lock);
1682 * Write back inode data in a worker thread. (This can't be done
1683 * in the message handler context.)
1685 void ceph_queue_writeback(struct inode *inode)
1688 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1689 &ceph_inode(inode)->i_wb_work)) {
1690 dout("ceph_queue_writeback %p\n", inode);
1692 dout("ceph_queue_writeback %p failed\n", inode);
1697 static void ceph_writeback_work(struct work_struct *work)
1699 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1701 struct inode *inode = &ci->vfs_inode;
1703 dout("writeback %p\n", inode);
1704 filemap_fdatawrite(&inode->i_data);
1709 * queue an async invalidation
1711 void ceph_queue_invalidate(struct inode *inode)
1714 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1715 &ceph_inode(inode)->i_pg_inv_work)) {
1716 dout("ceph_queue_invalidate %p\n", inode);
1718 dout("ceph_queue_invalidate %p failed\n", inode);
1724 * Invalidate inode pages in a worker thread. (This can't be done
1725 * in the message handler context.)
1727 static void ceph_invalidate_work(struct work_struct *work)
1729 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1731 struct inode *inode = &ci->vfs_inode;
1732 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1736 mutex_lock(&ci->i_truncate_mutex);
1738 if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
1739 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1740 inode, ceph_ino(inode));
1741 mapping_set_error(inode->i_mapping, -EIO);
1742 truncate_pagecache(inode, 0);
1743 mutex_unlock(&ci->i_truncate_mutex);
1747 spin_lock(&ci->i_ceph_lock);
1748 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1749 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1750 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1751 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1753 spin_unlock(&ci->i_ceph_lock);
1754 mutex_unlock(&ci->i_truncate_mutex);
1757 orig_gen = ci->i_rdcache_gen;
1758 spin_unlock(&ci->i_ceph_lock);
1760 ceph_fscache_invalidate(inode);
1761 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
1762 pr_err("invalidate_pages %p fails\n", inode);
1765 spin_lock(&ci->i_ceph_lock);
1766 if (orig_gen == ci->i_rdcache_gen &&
1767 orig_gen == ci->i_rdcache_revoking) {
1768 dout("invalidate_pages %p gen %d successful\n", inode,
1770 ci->i_rdcache_revoking--;
1773 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1774 inode, orig_gen, ci->i_rdcache_gen,
1775 ci->i_rdcache_revoking);
1776 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1779 spin_unlock(&ci->i_ceph_lock);
1780 mutex_unlock(&ci->i_truncate_mutex);
1783 ceph_check_caps(ci, 0, NULL);
1789 * called by trunc_wq;
1791 * We also truncate in a separate thread as well.
1793 static void ceph_vmtruncate_work(struct work_struct *work)
1795 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1797 struct inode *inode = &ci->vfs_inode;
1799 dout("vmtruncate_work %p\n", inode);
1800 __ceph_do_pending_vmtruncate(inode);
1805 * Queue an async vmtruncate. If we fail to queue work, we will handle
1806 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1808 void ceph_queue_vmtruncate(struct inode *inode)
1810 struct ceph_inode_info *ci = ceph_inode(inode);
1814 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
1815 &ci->i_vmtruncate_work)) {
1816 dout("ceph_queue_vmtruncate %p\n", inode);
1818 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1819 inode, ci->i_truncate_pending);
1825 * Make sure any pending truncation is applied before doing anything
1826 * that may depend on it.
1828 void __ceph_do_pending_vmtruncate(struct inode *inode)
1830 struct ceph_inode_info *ci = ceph_inode(inode);
1832 int wrbuffer_refs, finish = 0;
1834 mutex_lock(&ci->i_truncate_mutex);
1836 spin_lock(&ci->i_ceph_lock);
1837 if (ci->i_truncate_pending == 0) {
1838 dout("__do_pending_vmtruncate %p none pending\n", inode);
1839 spin_unlock(&ci->i_ceph_lock);
1840 mutex_unlock(&ci->i_truncate_mutex);
1845 * make sure any dirty snapped pages are flushed before we
1846 * possibly truncate them.. so write AND block!
1848 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1849 struct ceph_cap_snap *capsnap;
1850 to = ci->i_truncate_size;
1851 list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
1852 // MDS should have revoked Frw caps
1853 WARN_ON_ONCE(capsnap->writing);
1854 if (capsnap->dirty_pages && capsnap->size > to)
1857 spin_unlock(&ci->i_ceph_lock);
1858 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1861 truncate_pagecache(inode, to);
1863 filemap_write_and_wait_range(&inode->i_data, 0,
1864 inode->i_sb->s_maxbytes);
1868 /* there should be no reader or writer */
1869 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1871 to = ci->i_truncate_size;
1872 wrbuffer_refs = ci->i_wrbuffer_ref;
1873 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1874 ci->i_truncate_pending, to);
1875 spin_unlock(&ci->i_ceph_lock);
1877 truncate_pagecache(inode, to);
1879 spin_lock(&ci->i_ceph_lock);
1880 if (to == ci->i_truncate_size) {
1881 ci->i_truncate_pending = 0;
1884 spin_unlock(&ci->i_ceph_lock);
1888 mutex_unlock(&ci->i_truncate_mutex);
1890 if (wrbuffer_refs == 0)
1891 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1893 wake_up_all(&ci->i_cap_wq);
1899 static const struct inode_operations ceph_symlink_iops = {
1900 .get_link = simple_get_link,
1901 .setattr = ceph_setattr,
1902 .getattr = ceph_getattr,
1903 .listxattr = ceph_listxattr,
1906 int __ceph_setattr(struct inode *inode, struct iattr *attr)
1908 struct ceph_inode_info *ci = ceph_inode(inode);
1909 const unsigned int ia_valid = attr->ia_valid;
1910 struct ceph_mds_request *req;
1911 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
1912 struct ceph_cap_flush *prealloc_cf;
1914 int release = 0, dirtied = 0;
1917 int inode_dirty_flags = 0;
1918 bool lock_snap_rwsem = false;
1920 prealloc_cf = ceph_alloc_cap_flush();
1924 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1927 ceph_free_cap_flush(prealloc_cf);
1928 return PTR_ERR(req);
1931 spin_lock(&ci->i_ceph_lock);
1932 issued = __ceph_caps_issued(ci, NULL);
1934 if (!ci->i_head_snapc &&
1935 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
1936 lock_snap_rwsem = true;
1937 if (!down_read_trylock(&mdsc->snap_rwsem)) {
1938 spin_unlock(&ci->i_ceph_lock);
1939 down_read(&mdsc->snap_rwsem);
1940 spin_lock(&ci->i_ceph_lock);
1941 issued = __ceph_caps_issued(ci, NULL);
1945 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1947 if (ia_valid & ATTR_UID) {
1948 dout("setattr %p uid %d -> %d\n", inode,
1949 from_kuid(&init_user_ns, inode->i_uid),
1950 from_kuid(&init_user_ns, attr->ia_uid));
1951 if (issued & CEPH_CAP_AUTH_EXCL) {
1952 inode->i_uid = attr->ia_uid;
1953 dirtied |= CEPH_CAP_AUTH_EXCL;
1954 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1955 !uid_eq(attr->ia_uid, inode->i_uid)) {
1956 req->r_args.setattr.uid = cpu_to_le32(
1957 from_kuid(&init_user_ns, attr->ia_uid));
1958 mask |= CEPH_SETATTR_UID;
1959 release |= CEPH_CAP_AUTH_SHARED;
1962 if (ia_valid & ATTR_GID) {
1963 dout("setattr %p gid %d -> %d\n", inode,
1964 from_kgid(&init_user_ns, inode->i_gid),
1965 from_kgid(&init_user_ns, attr->ia_gid));
1966 if (issued & CEPH_CAP_AUTH_EXCL) {
1967 inode->i_gid = attr->ia_gid;
1968 dirtied |= CEPH_CAP_AUTH_EXCL;
1969 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1970 !gid_eq(attr->ia_gid, inode->i_gid)) {
1971 req->r_args.setattr.gid = cpu_to_le32(
1972 from_kgid(&init_user_ns, attr->ia_gid));
1973 mask |= CEPH_SETATTR_GID;
1974 release |= CEPH_CAP_AUTH_SHARED;
1977 if (ia_valid & ATTR_MODE) {
1978 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1980 if (issued & CEPH_CAP_AUTH_EXCL) {
1981 inode->i_mode = attr->ia_mode;
1982 dirtied |= CEPH_CAP_AUTH_EXCL;
1983 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1984 attr->ia_mode != inode->i_mode) {
1985 inode->i_mode = attr->ia_mode;
1986 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1987 mask |= CEPH_SETATTR_MODE;
1988 release |= CEPH_CAP_AUTH_SHARED;
1992 if (ia_valid & ATTR_ATIME) {
1993 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1994 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1995 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1996 if (issued & CEPH_CAP_FILE_EXCL) {
1997 ci->i_time_warp_seq++;
1998 inode->i_atime = attr->ia_atime;
1999 dirtied |= CEPH_CAP_FILE_EXCL;
2000 } else if ((issued & CEPH_CAP_FILE_WR) &&
2001 timespec_compare(&inode->i_atime,
2002 &attr->ia_atime) < 0) {
2003 inode->i_atime = attr->ia_atime;
2004 dirtied |= CEPH_CAP_FILE_WR;
2005 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2006 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
2007 ceph_encode_timespec(&req->r_args.setattr.atime,
2009 mask |= CEPH_SETATTR_ATIME;
2010 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
2014 if (ia_valid & ATTR_MTIME) {
2015 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
2016 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
2017 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
2018 if (issued & CEPH_CAP_FILE_EXCL) {
2019 ci->i_time_warp_seq++;
2020 inode->i_mtime = attr->ia_mtime;
2021 dirtied |= CEPH_CAP_FILE_EXCL;
2022 } else if ((issued & CEPH_CAP_FILE_WR) &&
2023 timespec_compare(&inode->i_mtime,
2024 &attr->ia_mtime) < 0) {
2025 inode->i_mtime = attr->ia_mtime;
2026 dirtied |= CEPH_CAP_FILE_WR;
2027 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2028 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
2029 ceph_encode_timespec(&req->r_args.setattr.mtime,
2031 mask |= CEPH_SETATTR_MTIME;
2032 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
2036 if (ia_valid & ATTR_SIZE) {
2037 dout("setattr %p size %lld -> %lld\n", inode,
2038 inode->i_size, attr->ia_size);
2039 if ((issued & CEPH_CAP_FILE_EXCL) &&
2040 attr->ia_size > inode->i_size) {
2041 i_size_write(inode, attr->ia_size);
2042 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2043 ci->i_reported_size = attr->ia_size;
2044 dirtied |= CEPH_CAP_FILE_EXCL;
2045 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2046 attr->ia_size != inode->i_size) {
2047 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2048 req->r_args.setattr.old_size =
2049 cpu_to_le64(inode->i_size);
2050 mask |= CEPH_SETATTR_SIZE;
2051 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
2056 /* these do nothing */
2057 if (ia_valid & ATTR_CTIME) {
2058 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2059 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
2060 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
2061 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
2062 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2063 only ? "ctime only" : "ignored");
2066 * if kernel wants to dirty ctime but nothing else,
2067 * we need to choose a cap to dirty under, or do
2068 * a almost-no-op setattr
2070 if (issued & CEPH_CAP_AUTH_EXCL)
2071 dirtied |= CEPH_CAP_AUTH_EXCL;
2072 else if (issued & CEPH_CAP_FILE_EXCL)
2073 dirtied |= CEPH_CAP_FILE_EXCL;
2074 else if (issued & CEPH_CAP_XATTR_EXCL)
2075 dirtied |= CEPH_CAP_XATTR_EXCL;
2077 mask |= CEPH_SETATTR_CTIME;
2080 if (ia_valid & ATTR_FILE)
2081 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
2084 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2086 inode->i_ctime = attr->ia_ctime;
2090 spin_unlock(&ci->i_ceph_lock);
2091 if (lock_snap_rwsem)
2092 up_read(&mdsc->snap_rwsem);
2094 if (inode_dirty_flags)
2095 __mark_inode_dirty(inode, inode_dirty_flags);
2099 req->r_inode = inode;
2101 req->r_inode_drop = release;
2102 req->r_args.setattr.mask = cpu_to_le32(mask);
2103 req->r_num_caps = 1;
2104 req->r_stamp = attr->ia_ctime;
2105 err = ceph_mdsc_do_request(mdsc, NULL, req);
2107 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
2108 ceph_cap_string(dirtied), mask);
2110 ceph_mdsc_put_request(req);
2111 ceph_free_cap_flush(prealloc_cf);
2113 if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
2114 __ceph_do_pending_vmtruncate(inode);
2122 int ceph_setattr(struct dentry *dentry, struct iattr *attr)
2124 struct inode *inode = d_inode(dentry);
2127 if (ceph_snap(inode) != CEPH_NOSNAP)
2130 err = setattr_prepare(dentry, attr);
2134 err = __ceph_setattr(inode, attr);
2136 if (err >= 0 && (attr->ia_valid & ATTR_MODE))
2137 err = posix_acl_chmod(inode, attr->ia_mode);
2143 * Verify that we have a lease on the given mask. If not,
2144 * do a getattr against an mds.
2146 int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2147 int mask, bool force)
2149 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
2150 struct ceph_mds_client *mdsc = fsc->mdsc;
2151 struct ceph_mds_request *req;
2154 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2155 dout("do_getattr inode %p SNAPDIR\n", inode);
2159 dout("do_getattr inode %p mask %s mode 0%o\n",
2160 inode, ceph_cap_string(mask), inode->i_mode);
2161 if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
2164 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
2166 return PTR_ERR(req);
2167 req->r_inode = inode;
2169 req->r_num_caps = 1;
2170 req->r_args.getattr.mask = cpu_to_le32(mask);
2171 req->r_locked_page = locked_page;
2172 err = ceph_mdsc_do_request(mdsc, NULL, req);
2173 if (locked_page && err == 0) {
2174 u64 inline_version = req->r_reply_info.targeti.inline_version;
2175 if (inline_version == 0) {
2176 /* the reply is supposed to contain inline data */
2178 } else if (inline_version == CEPH_INLINE_NONE) {
2181 err = req->r_reply_info.targeti.inline_len;
2184 ceph_mdsc_put_request(req);
2185 dout("do_getattr result=%d\n", err);
2191 * Check inode permissions. We verify we have a valid value for
2192 * the AUTH cap, then call the generic handler.
2194 int ceph_permission(struct inode *inode, int mask)
2198 if (mask & MAY_NOT_BLOCK)
2201 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
2204 err = generic_permission(inode, mask);
2209 * Get all attributes. Hopefully somedata we'll have a statlite()
2210 * and can limit the fields we require to be accurate.
2212 int ceph_getattr(const struct path *path, struct kstat *stat,
2213 u32 request_mask, unsigned int flags)
2215 struct inode *inode = d_inode(path->dentry);
2216 struct ceph_inode_info *ci = ceph_inode(inode);
2219 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
2221 generic_fillattr(inode, stat);
2222 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
2223 if (ceph_snap(inode) != CEPH_NOSNAP)
2224 stat->dev = ceph_snap(inode);
2227 if (S_ISDIR(inode->i_mode)) {
2228 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
2230 stat->size = ci->i_rbytes;
2232 stat->size = ci->i_files + ci->i_subdirs;
2234 stat->blksize = 65536;