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 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
45 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
46 inode_set_iversion_raw(inode, 0);
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;
447 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
448 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
450 ci->i_fragtree = RB_ROOT;
451 mutex_init(&ci->i_fragtree_mutex);
453 ci->i_xattrs.blob = NULL;
454 ci->i_xattrs.prealloc_blob = NULL;
455 ci->i_xattrs.dirty = false;
456 ci->i_xattrs.index = RB_ROOT;
457 ci->i_xattrs.count = 0;
458 ci->i_xattrs.names_size = 0;
459 ci->i_xattrs.vals_size = 0;
460 ci->i_xattrs.version = 0;
461 ci->i_xattrs.index_version = 0;
463 ci->i_caps = RB_ROOT;
464 ci->i_auth_cap = NULL;
465 ci->i_dirty_caps = 0;
466 ci->i_flushing_caps = 0;
467 INIT_LIST_HEAD(&ci->i_dirty_item);
468 INIT_LIST_HEAD(&ci->i_flushing_item);
469 ci->i_prealloc_cap_flush = NULL;
470 INIT_LIST_HEAD(&ci->i_cap_flush_list);
471 init_waitqueue_head(&ci->i_cap_wq);
472 ci->i_hold_caps_min = 0;
473 ci->i_hold_caps_max = 0;
474 INIT_LIST_HEAD(&ci->i_cap_delay_list);
475 INIT_LIST_HEAD(&ci->i_cap_snaps);
476 ci->i_head_snapc = NULL;
479 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
480 ci->i_nr_by_mode[i] = 0;
482 mutex_init(&ci->i_truncate_mutex);
483 ci->i_truncate_seq = 0;
484 ci->i_truncate_size = 0;
485 ci->i_truncate_pending = 0;
488 ci->i_reported_size = 0;
489 ci->i_wanted_max_size = 0;
490 ci->i_requested_max_size = 0;
494 ci->i_rdcache_ref = 0;
497 ci->i_wrbuffer_ref = 0;
498 ci->i_wrbuffer_ref_head = 0;
499 atomic_set(&ci->i_filelock_ref, 0);
500 atomic_set(&ci->i_shared_gen, 1);
501 ci->i_rdcache_gen = 0;
502 ci->i_rdcache_revoking = 0;
504 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
505 INIT_LIST_HEAD(&ci->i_unsafe_iops);
506 spin_lock_init(&ci->i_unsafe_lock);
508 ci->i_snap_realm = NULL;
509 INIT_LIST_HEAD(&ci->i_snap_realm_item);
510 INIT_LIST_HEAD(&ci->i_snap_flush_item);
512 INIT_WORK(&ci->i_work, ceph_inode_work);
514 memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
516 ceph_fscache_inode_init(ci);
518 return &ci->vfs_inode;
521 void ceph_free_inode(struct inode *inode)
523 struct ceph_inode_info *ci = ceph_inode(inode);
525 kfree(ci->i_symlink);
526 kmem_cache_free(ceph_inode_cachep, ci);
529 void ceph_evict_inode(struct inode *inode)
531 struct ceph_inode_info *ci = ceph_inode(inode);
532 struct ceph_inode_frag *frag;
535 dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
537 truncate_inode_pages_final(&inode->i_data);
540 ceph_fscache_unregister_inode_cookie(ci);
542 __ceph_remove_caps(ci);
544 if (__ceph_has_any_quota(ci))
545 ceph_adjust_quota_realms_count(inode, false);
548 * we may still have a snap_realm reference if there are stray
549 * caps in i_snap_caps.
551 if (ci->i_snap_realm) {
552 struct ceph_mds_client *mdsc =
553 ceph_inode_to_client(inode)->mdsc;
554 if (ceph_snap(inode) == CEPH_NOSNAP) {
555 struct ceph_snap_realm *realm = ci->i_snap_realm;
556 dout(" dropping residual ref to snap realm %p\n",
558 spin_lock(&realm->inodes_with_caps_lock);
559 list_del_init(&ci->i_snap_realm_item);
560 ci->i_snap_realm = NULL;
561 if (realm->ino == ci->i_vino.ino)
563 spin_unlock(&realm->inodes_with_caps_lock);
564 ceph_put_snap_realm(mdsc, realm);
566 ceph_put_snapid_map(mdsc, ci->i_snapid_map);
567 ci->i_snap_realm = NULL;
571 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
572 frag = rb_entry(n, struct ceph_inode_frag, node);
573 rb_erase(n, &ci->i_fragtree);
576 ci->i_fragtree_nsplits = 0;
578 __ceph_destroy_xattrs(ci);
579 if (ci->i_xattrs.blob)
580 ceph_buffer_put(ci->i_xattrs.blob);
581 if (ci->i_xattrs.prealloc_blob)
582 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
584 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
587 static inline blkcnt_t calc_inode_blocks(u64 size)
589 return (size + (1<<9) - 1) >> 9;
593 * Helpers to fill in size, ctime, mtime, and atime. We have to be
594 * careful because either the client or MDS may have more up to date
595 * info, depending on which capabilities are held, and whether
596 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
597 * and size are monotonically increasing, except when utimes() or
598 * truncate() increments the corresponding _seq values.)
600 int ceph_fill_file_size(struct inode *inode, int issued,
601 u32 truncate_seq, u64 truncate_size, u64 size)
603 struct ceph_inode_info *ci = ceph_inode(inode);
606 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
607 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
608 dout("size %lld -> %llu\n", inode->i_size, size);
609 if (size > 0 && S_ISDIR(inode->i_mode)) {
610 pr_err("fill_file_size non-zero size for directory\n");
613 i_size_write(inode, size);
614 inode->i_blocks = calc_inode_blocks(size);
615 ci->i_reported_size = size;
616 if (truncate_seq != ci->i_truncate_seq) {
617 dout("truncate_seq %u -> %u\n",
618 ci->i_truncate_seq, truncate_seq);
619 ci->i_truncate_seq = truncate_seq;
621 /* the MDS should have revoked these caps */
622 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
625 CEPH_CAP_FILE_LAZYIO));
627 * If we hold relevant caps, or in the case where we're
628 * not the only client referencing this file and we
629 * don't hold those caps, then we need to check whether
630 * the file is either opened or mmaped
632 if ((issued & (CEPH_CAP_FILE_CACHE|
633 CEPH_CAP_FILE_BUFFER)) ||
634 mapping_mapped(inode->i_mapping) ||
635 __ceph_caps_file_wanted(ci)) {
636 ci->i_truncate_pending++;
641 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
642 ci->i_truncate_size != truncate_size) {
643 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
645 ci->i_truncate_size = truncate_size;
649 ceph_fscache_invalidate(inode);
654 void ceph_fill_file_time(struct inode *inode, int issued,
655 u64 time_warp_seq, struct timespec64 *ctime,
656 struct timespec64 *mtime, struct timespec64 *atime)
658 struct ceph_inode_info *ci = ceph_inode(inode);
661 if (issued & (CEPH_CAP_FILE_EXCL|
663 CEPH_CAP_FILE_BUFFER|
665 CEPH_CAP_XATTR_EXCL)) {
666 if (ci->i_version == 0 ||
667 timespec64_compare(ctime, &inode->i_ctime) > 0) {
668 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
669 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
670 ctime->tv_sec, ctime->tv_nsec);
671 inode->i_ctime = *ctime;
673 if (ci->i_version == 0 ||
674 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
675 /* the MDS did a utimes() */
676 dout("mtime %lld.%09ld -> %lld.%09ld "
678 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
679 mtime->tv_sec, mtime->tv_nsec,
680 ci->i_time_warp_seq, (int)time_warp_seq);
682 inode->i_mtime = *mtime;
683 inode->i_atime = *atime;
684 ci->i_time_warp_seq = time_warp_seq;
685 } else if (time_warp_seq == ci->i_time_warp_seq) {
686 /* nobody did utimes(); take the max */
687 if (timespec64_compare(mtime, &inode->i_mtime) > 0) {
688 dout("mtime %lld.%09ld -> %lld.%09ld inc\n",
689 inode->i_mtime.tv_sec,
690 inode->i_mtime.tv_nsec,
691 mtime->tv_sec, mtime->tv_nsec);
692 inode->i_mtime = *mtime;
694 if (timespec64_compare(atime, &inode->i_atime) > 0) {
695 dout("atime %lld.%09ld -> %lld.%09ld inc\n",
696 inode->i_atime.tv_sec,
697 inode->i_atime.tv_nsec,
698 atime->tv_sec, atime->tv_nsec);
699 inode->i_atime = *atime;
701 } else if (issued & CEPH_CAP_FILE_EXCL) {
702 /* we did a utimes(); ignore mds values */
707 /* we have no write|excl caps; whatever the MDS says is true */
708 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
709 inode->i_ctime = *ctime;
710 inode->i_mtime = *mtime;
711 inode->i_atime = *atime;
712 ci->i_time_warp_seq = time_warp_seq;
717 if (warn) /* time_warp_seq shouldn't go backwards */
718 dout("%p mds time_warp_seq %llu < %u\n",
719 inode, time_warp_seq, ci->i_time_warp_seq);
723 * Populate an inode based on info from mds. May be called on new or
726 static int fill_inode(struct inode *inode, struct page *locked_page,
727 struct ceph_mds_reply_info_in *iinfo,
728 struct ceph_mds_reply_dirfrag *dirinfo,
729 struct ceph_mds_session *session,
730 unsigned long ttl_from, int cap_fmode,
731 struct ceph_cap_reservation *caps_reservation)
733 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
734 struct ceph_mds_reply_inode *info = iinfo->in;
735 struct ceph_inode_info *ci = ceph_inode(inode);
736 int issued, new_issued, info_caps;
737 struct timespec64 mtime, atime, ctime;
738 struct ceph_buffer *xattr_blob = NULL;
739 struct ceph_buffer *old_blob = NULL;
740 struct ceph_string *pool_ns = NULL;
741 struct ceph_cap *new_cap = NULL;
744 bool queue_trunc = false;
745 bool new_version = false;
746 bool fill_inline = false;
748 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
749 inode, ceph_vinop(inode), le64_to_cpu(info->version),
752 info_caps = le32_to_cpu(info->cap.caps);
754 /* prealloc new cap struct */
755 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP)
756 new_cap = ceph_get_cap(mdsc, caps_reservation);
759 * prealloc xattr data, if it looks like we'll need it. only
760 * if len > 4 (meaning there are actually xattrs; the first 4
761 * bytes are the xattr count).
763 if (iinfo->xattr_len > 4) {
764 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
766 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
770 if (iinfo->pool_ns_len > 0)
771 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
774 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map)
775 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode));
777 spin_lock(&ci->i_ceph_lock);
780 * provided version will be odd if inode value is projected,
781 * even if stable. skip the update if we have newer stable
782 * info (ours>=theirs, e.g. due to racing mds replies), unless
783 * we are getting projected (unstable) info (in which case the
784 * version is odd, and we want ours>theirs).
790 if (ci->i_version == 0 ||
791 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
792 le64_to_cpu(info->version) > (ci->i_version & ~1)))
795 /* Update change_attribute */
796 inode_set_max_iversion_raw(inode, iinfo->change_attr);
798 __ceph_caps_issued(ci, &issued);
799 issued |= __ceph_caps_dirty(ci);
800 new_issued = ~issued & info_caps;
803 inode->i_rdev = le32_to_cpu(info->rdev);
804 /* directories have fl_stripe_unit set to zero */
805 if (le32_to_cpu(info->layout.fl_stripe_unit))
807 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
809 inode->i_blkbits = CEPH_BLOCK_SHIFT;
811 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
813 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
814 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
815 inode->i_mode = le32_to_cpu(info->mode);
816 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
817 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
818 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
819 from_kuid(&init_user_ns, inode->i_uid),
820 from_kgid(&init_user_ns, inode->i_gid));
821 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
822 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
825 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
826 (issued & CEPH_CAP_LINK_EXCL) == 0)
827 set_nlink(inode, le32_to_cpu(info->nlink));
829 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
830 /* be careful with mtime, atime, size */
831 ceph_decode_timespec64(&atime, &info->atime);
832 ceph_decode_timespec64(&mtime, &info->mtime);
833 ceph_decode_timespec64(&ctime, &info->ctime);
834 ceph_fill_file_time(inode, issued,
835 le32_to_cpu(info->time_warp_seq),
836 &ctime, &mtime, &atime);
839 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) {
840 ci->i_files = le64_to_cpu(info->files);
841 ci->i_subdirs = le64_to_cpu(info->subdirs);
845 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
846 s64 old_pool = ci->i_layout.pool_id;
847 struct ceph_string *old_ns;
849 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
850 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
851 lockdep_is_held(&ci->i_ceph_lock));
852 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
854 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
855 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
859 queue_trunc = ceph_fill_file_size(inode, issued,
860 le32_to_cpu(info->truncate_seq),
861 le64_to_cpu(info->truncate_size),
862 le64_to_cpu(info->size));
863 /* only update max_size on auth cap */
864 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
865 ci->i_max_size != le64_to_cpu(info->max_size)) {
866 dout("max_size %lld -> %llu\n", ci->i_max_size,
867 le64_to_cpu(info->max_size));
868 ci->i_max_size = le64_to_cpu(info->max_size);
872 /* layout and rstat are not tracked by capability, update them if
873 * the inode info is from auth mds */
874 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) {
875 if (S_ISDIR(inode->i_mode)) {
876 ci->i_dir_layout = iinfo->dir_layout;
877 ci->i_rbytes = le64_to_cpu(info->rbytes);
878 ci->i_rfiles = le64_to_cpu(info->rfiles);
879 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
880 ci->i_dir_pin = iinfo->dir_pin;
881 ceph_decode_timespec64(&ci->i_rctime, &info->rctime);
886 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
887 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
888 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
889 if (ci->i_xattrs.blob)
890 old_blob = ci->i_xattrs.blob;
891 ci->i_xattrs.blob = xattr_blob;
893 memcpy(ci->i_xattrs.blob->vec.iov_base,
894 iinfo->xattr_data, iinfo->xattr_len);
895 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
896 ceph_forget_all_cached_acls(inode);
897 ceph_security_invalidate_secctx(inode);
901 /* finally update i_version */
902 if (le64_to_cpu(info->version) > ci->i_version)
903 ci->i_version = le64_to_cpu(info->version);
905 inode->i_mapping->a_ops = &ceph_aops;
907 switch (inode->i_mode & S_IFMT) {
912 inode->i_blkbits = PAGE_SHIFT;
913 init_special_inode(inode, inode->i_mode, inode->i_rdev);
914 inode->i_op = &ceph_file_iops;
917 inode->i_op = &ceph_file_iops;
918 inode->i_fop = &ceph_file_fops;
921 inode->i_op = &ceph_symlink_iops;
922 if (!ci->i_symlink) {
923 u32 symlen = iinfo->symlink_len;
926 spin_unlock(&ci->i_ceph_lock);
928 if (symlen != i_size_read(inode)) {
929 pr_err("fill_inode %llx.%llx BAD symlink "
930 "size %lld\n", ceph_vinop(inode),
932 i_size_write(inode, symlen);
933 inode->i_blocks = calc_inode_blocks(symlen);
937 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
941 spin_lock(&ci->i_ceph_lock);
945 kfree(sym); /* lost a race */
947 inode->i_link = ci->i_symlink;
950 inode->i_op = &ceph_dir_iops;
951 inode->i_fop = &ceph_dir_fops;
954 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
955 ceph_vinop(inode), inode->i_mode);
958 /* were we issued a capability? */
960 if (ceph_snap(inode) == CEPH_NOSNAP) {
961 ceph_add_cap(inode, session,
962 le64_to_cpu(info->cap.cap_id),
963 cap_fmode, info_caps,
964 le32_to_cpu(info->cap.wanted),
965 le32_to_cpu(info->cap.seq),
966 le32_to_cpu(info->cap.mseq),
967 le64_to_cpu(info->cap.realm),
968 info->cap.flags, &new_cap);
970 /* set dir completion flag? */
971 if (S_ISDIR(inode->i_mode) &&
972 ci->i_files == 0 && ci->i_subdirs == 0 &&
973 (info_caps & CEPH_CAP_FILE_SHARED) &&
974 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
975 !__ceph_dir_is_complete(ci)) {
976 dout(" marking %p complete (empty)\n", inode);
977 i_size_write(inode, 0);
978 __ceph_dir_set_complete(ci,
979 atomic64_read(&ci->i_release_count),
980 atomic64_read(&ci->i_ordered_count));
985 dout(" %p got snap_caps %s\n", inode,
986 ceph_cap_string(info_caps));
987 ci->i_snap_caps |= info_caps;
989 __ceph_get_fmode(ci, cap_fmode);
991 } else if (cap_fmode >= 0) {
992 pr_warn("mds issued no caps on %llx.%llx\n",
994 __ceph_get_fmode(ci, cap_fmode);
997 if (iinfo->inline_version > 0 &&
998 iinfo->inline_version >= ci->i_inline_version) {
999 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1000 ci->i_inline_version = iinfo->inline_version;
1001 if (ci->i_inline_version != CEPH_INLINE_NONE &&
1002 (locked_page || (info_caps & cache_caps)))
1006 spin_unlock(&ci->i_ceph_lock);
1009 ceph_fill_inline_data(inode, locked_page,
1010 iinfo->inline_data, iinfo->inline_len);
1013 wake_up_all(&ci->i_cap_wq);
1015 /* queue truncate if we saw i_size decrease */
1017 ceph_queue_vmtruncate(inode);
1019 /* populate frag tree */
1020 if (S_ISDIR(inode->i_mode))
1021 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
1023 /* update delegation info? */
1025 ceph_fill_dirfrag(inode, dirinfo);
1030 ceph_put_cap(mdsc, new_cap);
1031 ceph_buffer_put(old_blob);
1032 ceph_buffer_put(xattr_blob);
1033 ceph_put_string(pool_ns);
1038 * caller should hold session s_mutex and dentry->d_lock.
1040 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry,
1041 struct ceph_mds_reply_lease *lease,
1042 struct ceph_mds_session *session,
1043 unsigned long from_time,
1044 struct ceph_mds_session **old_lease_session)
1046 struct ceph_dentry_info *di = ceph_dentry(dentry);
1047 long unsigned duration = le32_to_cpu(lease->duration_ms);
1048 long unsigned ttl = from_time + (duration * HZ) / 1000;
1049 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
1051 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1052 dentry, duration, ttl);
1054 /* only track leases on regular dentries */
1055 if (ceph_snap(dir) != CEPH_NOSNAP)
1058 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
1059 if (duration == 0) {
1060 __ceph_dentry_dir_lease_touch(di);
1064 if (di->lease_gen == session->s_cap_gen &&
1065 time_before(ttl, di->time))
1066 return; /* we already have a newer lease. */
1068 if (di->lease_session && di->lease_session != session) {
1069 *old_lease_session = di->lease_session;
1070 di->lease_session = NULL;
1073 if (!di->lease_session)
1074 di->lease_session = ceph_get_mds_session(session);
1075 di->lease_gen = session->s_cap_gen;
1076 di->lease_seq = le32_to_cpu(lease->seq);
1077 di->lease_renew_after = half_ttl;
1078 di->lease_renew_from = 0;
1081 __ceph_dentry_lease_touch(di);
1084 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry,
1085 struct ceph_mds_reply_lease *lease,
1086 struct ceph_mds_session *session,
1087 unsigned long from_time)
1089 struct ceph_mds_session *old_lease_session = NULL;
1090 spin_lock(&dentry->d_lock);
1091 __update_dentry_lease(dir, dentry, lease, session, from_time,
1092 &old_lease_session);
1093 spin_unlock(&dentry->d_lock);
1094 if (old_lease_session)
1095 ceph_put_mds_session(old_lease_session);
1099 * update dentry lease without having parent inode locked
1101 static void update_dentry_lease_careful(struct dentry *dentry,
1102 struct ceph_mds_reply_lease *lease,
1103 struct ceph_mds_session *session,
1104 unsigned long from_time,
1105 char *dname, u32 dname_len,
1106 struct ceph_vino *pdvino,
1107 struct ceph_vino *ptvino)
1111 struct ceph_mds_session *old_lease_session = NULL;
1113 spin_lock(&dentry->d_lock);
1114 /* make sure dentry's name matches target */
1115 if (dentry->d_name.len != dname_len ||
1116 memcmp(dentry->d_name.name, dname, dname_len))
1119 dir = d_inode(dentry->d_parent);
1120 /* make sure parent matches dvino */
1121 if (!ceph_ino_compare(dir, pdvino))
1124 /* make sure dentry's inode matches target. NULL ptvino means that
1125 * we expect a negative dentry */
1127 if (d_really_is_negative(dentry))
1129 if (!ceph_ino_compare(d_inode(dentry), ptvino))
1132 if (d_really_is_positive(dentry))
1136 __update_dentry_lease(dir, dentry, lease, session,
1137 from_time, &old_lease_session);
1139 spin_unlock(&dentry->d_lock);
1140 if (old_lease_session)
1141 ceph_put_mds_session(old_lease_session);
1145 * splice a dentry to an inode.
1146 * caller must hold directory i_mutex for this to be safe.
1148 static int splice_dentry(struct dentry **pdn, struct inode *in)
1150 struct dentry *dn = *pdn;
1151 struct dentry *realdn;
1153 BUG_ON(d_inode(dn));
1155 if (S_ISDIR(in->i_mode)) {
1156 /* If inode is directory, d_splice_alias() below will remove
1157 * 'realdn' from its origin parent. We need to ensure that
1158 * origin parent's readdir cache will not reference 'realdn'
1160 realdn = d_find_any_alias(in);
1162 struct ceph_dentry_info *di = ceph_dentry(realdn);
1163 spin_lock(&realdn->d_lock);
1165 realdn->d_op->d_prune(realdn);
1168 di->lease_shared_gen = 0;
1171 spin_unlock(&realdn->d_lock);
1176 /* dn must be unhashed */
1177 if (!d_unhashed(dn))
1179 realdn = d_splice_alias(in, dn);
1180 if (IS_ERR(realdn)) {
1181 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1182 PTR_ERR(realdn), dn, in, ceph_vinop(in));
1183 return PTR_ERR(realdn);
1187 dout("dn %p (%d) spliced with %p (%d) "
1188 "inode %p ino %llx.%llx\n",
1190 realdn, d_count(realdn),
1191 d_inode(realdn), ceph_vinop(d_inode(realdn)));
1195 BUG_ON(!ceph_dentry(dn));
1196 dout("dn %p attached to %p ino %llx.%llx\n",
1197 dn, d_inode(dn), ceph_vinop(d_inode(dn)));
1203 * Incorporate results into the local cache. This is either just
1204 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1207 * A reply may contain
1208 * a directory inode along with a dentry.
1209 * and/or a target inode
1211 * Called with snap_rwsem (read).
1213 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
1215 struct ceph_mds_session *session = req->r_session;
1216 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1217 struct inode *in = NULL;
1218 struct ceph_vino tvino, dvino;
1219 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1222 dout("fill_trace %p is_dentry %d is_target %d\n", req,
1223 rinfo->head->is_dentry, rinfo->head->is_target);
1225 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1226 dout("fill_trace reply is empty!\n");
1227 if (rinfo->head->result == 0 && req->r_parent)
1228 ceph_invalidate_dir_request(req);
1232 if (rinfo->head->is_dentry) {
1233 struct inode *dir = req->r_parent;
1236 err = fill_inode(dir, NULL,
1237 &rinfo->diri, rinfo->dirfrag,
1238 session, req->r_request_started, -1,
1239 &req->r_caps_reservation);
1246 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME &&
1247 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1248 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1250 struct dentry *dn, *parent;
1252 BUG_ON(!rinfo->head->is_target);
1253 BUG_ON(req->r_dentry);
1255 parent = d_find_any_alias(dir);
1258 dname.name = rinfo->dname;
1259 dname.len = rinfo->dname_len;
1260 dname.hash = full_name_hash(parent, dname.name, dname.len);
1261 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1262 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1264 dn = d_lookup(parent, &dname);
1265 dout("d_lookup on parent=%p name=%.*s got %p\n",
1266 parent, dname.len, dname.name, dn);
1269 dn = d_alloc(parent, &dname);
1270 dout("d_alloc %p '%.*s' = %p\n", parent,
1271 dname.len, dname.name, dn);
1278 } else if (d_really_is_positive(dn) &&
1279 (ceph_ino(d_inode(dn)) != tvino.ino ||
1280 ceph_snap(d_inode(dn)) != tvino.snap)) {
1281 dout(" dn %p points to wrong inode %p\n",
1283 ceph_dir_clear_ordered(dir);
1294 if (rinfo->head->is_target) {
1295 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1296 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1298 in = ceph_get_inode(sb, tvino);
1303 req->r_target_inode = in;
1305 err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
1306 session, req->r_request_started,
1307 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1308 rinfo->head->result == 0) ? req->r_fmode : -1,
1309 &req->r_caps_reservation);
1311 pr_err("fill_inode badness %p %llx.%llx\n",
1312 in, ceph_vinop(in));
1318 * ignore null lease/binding on snapdir ENOENT, or else we
1319 * will have trouble splicing in the virtual snapdir later
1321 if (rinfo->head->is_dentry &&
1322 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1323 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1324 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1325 fsc->mount_options->snapdir_name,
1326 req->r_dentry->d_name.len))) {
1328 * lookup link rename : null -> possibly existing inode
1329 * mknod symlink mkdir : null -> new inode
1330 * unlink : linked -> null
1332 struct inode *dir = req->r_parent;
1333 struct dentry *dn = req->r_dentry;
1334 bool have_dir_cap, have_lease;
1338 BUG_ON(d_inode(dn->d_parent) != dir);
1340 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1341 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1343 BUG_ON(ceph_ino(dir) != dvino.ino);
1344 BUG_ON(ceph_snap(dir) != dvino.snap);
1346 /* do we have a lease on the whole dir? */
1348 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1349 CEPH_CAP_FILE_SHARED);
1351 /* do we have a dn lease? */
1352 have_lease = have_dir_cap ||
1353 le32_to_cpu(rinfo->dlease->duration_ms);
1355 dout("fill_trace no dentry lease or dir cap\n");
1358 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1359 struct inode *olddir = req->r_old_dentry_dir;
1362 dout(" src %p '%pd' dst %p '%pd'\n",
1366 dout("fill_trace doing d_move %p -> %p\n",
1367 req->r_old_dentry, dn);
1369 /* d_move screws up sibling dentries' offsets */
1370 ceph_dir_clear_ordered(dir);
1371 ceph_dir_clear_ordered(olddir);
1373 d_move(req->r_old_dentry, dn);
1374 dout(" src %p '%pd' dst %p '%pd'\n",
1379 /* ensure target dentry is invalidated, despite
1380 rehashing bug in vfs_rename_dir */
1381 ceph_invalidate_dentry_lease(dn);
1383 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
1384 ceph_dentry(req->r_old_dentry)->offset);
1386 /* swap r_dentry and r_old_dentry in case that
1387 * splice_dentry() gets called later. This is safe
1388 * because no other place will use them */
1389 req->r_dentry = req->r_old_dentry;
1390 req->r_old_dentry = dn;
1395 if (!rinfo->head->is_target) {
1396 dout("fill_trace null dentry\n");
1397 if (d_really_is_positive(dn)) {
1398 dout("d_delete %p\n", dn);
1399 ceph_dir_clear_ordered(dir);
1401 } else if (have_lease) {
1404 update_dentry_lease(dir, dn,
1405 rinfo->dlease, session,
1406 req->r_request_started);
1411 /* attach proper inode */
1412 if (d_really_is_negative(dn)) {
1413 ceph_dir_clear_ordered(dir);
1415 err = splice_dentry(&req->r_dentry, in);
1418 dn = req->r_dentry; /* may have spliced */
1419 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
1420 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1421 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1428 update_dentry_lease(dir, dn,
1429 rinfo->dlease, session,
1430 req->r_request_started);
1432 dout(" final dn %p\n", dn);
1433 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1434 req->r_op == CEPH_MDS_OP_MKSNAP) &&
1435 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1436 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
1437 struct inode *dir = req->r_parent;
1439 /* fill out a snapdir LOOKUPSNAP dentry */
1441 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
1442 BUG_ON(!req->r_dentry);
1443 dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry);
1444 ceph_dir_clear_ordered(dir);
1446 err = splice_dentry(&req->r_dentry, in);
1449 } else if (rinfo->head->is_dentry && req->r_dentry) {
1450 /* parent inode is not locked, be carefull */
1451 struct ceph_vino *ptvino = NULL;
1452 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1453 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1454 if (rinfo->head->is_target) {
1455 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1456 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1459 update_dentry_lease_careful(req->r_dentry, rinfo->dlease,
1460 session, req->r_request_started,
1461 rinfo->dname, rinfo->dname_len,
1465 dout("fill_trace done err=%d\n", err);
1470 * Prepopulate our cache with readdir results, leases, etc.
1472 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1473 struct ceph_mds_session *session)
1475 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1478 for (i = 0; i < rinfo->dir_nr; i++) {
1479 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1480 struct ceph_vino vino;
1484 vino.ino = le64_to_cpu(rde->inode.in->ino);
1485 vino.snap = le64_to_cpu(rde->inode.in->snapid);
1487 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1490 dout("new_inode badness got %d\n", err);
1493 rc = fill_inode(in, NULL, &rde->inode, NULL, session,
1494 req->r_request_started, -1,
1495 &req->r_caps_reservation);
1497 pr_err("fill_inode badness on %p got %d\n", in, rc);
1500 /* avoid calling iput_final() in mds dispatch threads */
1501 ceph_async_iput(in);
1507 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1511 put_page(ctl->page);
1516 static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1517 struct ceph_readdir_cache_control *ctl,
1518 struct ceph_mds_request *req)
1520 struct ceph_inode_info *ci = ceph_inode(dir);
1521 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
1522 unsigned idx = ctl->index % nsize;
1523 pgoff_t pgoff = ctl->index / nsize;
1525 if (!ctl->page || pgoff != page_index(ctl->page)) {
1526 ceph_readdir_cache_release(ctl);
1528 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1530 ctl->page = find_lock_page(&dir->i_data, pgoff);
1533 return idx == 0 ? -ENOMEM : 0;
1535 /* reading/filling the cache are serialized by
1536 * i_mutex, no need to use page lock */
1537 unlock_page(ctl->page);
1538 ctl->dentries = kmap(ctl->page);
1540 memset(ctl->dentries, 0, PAGE_SIZE);
1543 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1544 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1545 dout("readdir cache dn %p idx %d\n", dn, ctl->index);
1546 ctl->dentries[idx] = dn;
1549 dout("disable readdir cache\n");
1555 int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1556 struct ceph_mds_session *session)
1558 struct dentry *parent = req->r_dentry;
1559 struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
1560 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1564 int err = 0, skipped = 0, ret, i;
1565 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1566 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1569 struct ceph_readdir_cache_control cache_ctl = {};
1571 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
1572 return readdir_prepopulate_inodes_only(req, session);
1574 if (rinfo->hash_order) {
1576 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1578 strlen(req->r_path2));
1579 last_hash = ceph_frag_value(last_hash);
1580 } else if (rinfo->offset_hash) {
1581 /* mds understands offset_hash */
1582 WARN_ON_ONCE(req->r_readdir_offset != 2);
1583 last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
1587 if (rinfo->dir_dir &&
1588 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1589 dout("readdir_prepopulate got new frag %x -> %x\n",
1590 frag, le32_to_cpu(rinfo->dir_dir->frag));
1591 frag = le32_to_cpu(rinfo->dir_dir->frag);
1592 if (!rinfo->hash_order)
1593 req->r_readdir_offset = 2;
1596 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1597 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1598 rinfo->dir_nr, parent);
1600 dout("readdir_prepopulate %d items under dn %p\n",
1601 rinfo->dir_nr, parent);
1603 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
1605 if (ceph_frag_is_leftmost(frag) &&
1606 req->r_readdir_offset == 2 &&
1607 !(rinfo->hash_order && last_hash)) {
1608 /* note dir version at start of readdir so we can
1609 * tell if any dentries get dropped */
1610 req->r_dir_release_cnt =
1611 atomic64_read(&ci->i_release_count);
1612 req->r_dir_ordered_cnt =
1613 atomic64_read(&ci->i_ordered_count);
1614 req->r_readdir_cache_idx = 0;
1618 cache_ctl.index = req->r_readdir_cache_idx;
1619 fpos_offset = req->r_readdir_offset;
1621 /* FIXME: release caps/leases if error occurs */
1622 for (i = 0; i < rinfo->dir_nr; i++) {
1623 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1624 struct ceph_vino tvino;
1626 dname.name = rde->name;
1627 dname.len = rde->name_len;
1628 dname.hash = full_name_hash(parent, dname.name, dname.len);
1630 tvino.ino = le64_to_cpu(rde->inode.in->ino);
1631 tvino.snap = le64_to_cpu(rde->inode.in->snapid);
1633 if (rinfo->hash_order) {
1634 u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1635 rde->name, rde->name_len);
1636 hash = ceph_frag_value(hash);
1637 if (hash != last_hash)
1640 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1642 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1646 dn = d_lookup(parent, &dname);
1647 dout("d_lookup on parent=%p name=%.*s got %p\n",
1648 parent, dname.len, dname.name, dn);
1651 dn = d_alloc(parent, &dname);
1652 dout("d_alloc %p '%.*s' = %p\n", parent,
1653 dname.len, dname.name, dn);
1655 dout("d_alloc badness\n");
1659 } else if (d_really_is_positive(dn) &&
1660 (ceph_ino(d_inode(dn)) != tvino.ino ||
1661 ceph_snap(d_inode(dn)) != tvino.snap)) {
1662 struct ceph_dentry_info *di = ceph_dentry(dn);
1663 dout(" dn %p points to wrong inode %p\n",
1666 spin_lock(&dn->d_lock);
1667 if (di->offset > 0 &&
1668 di->lease_shared_gen ==
1669 atomic_read(&ci->i_shared_gen)) {
1670 __ceph_dir_clear_ordered(ci);
1673 spin_unlock(&dn->d_lock);
1681 if (d_really_is_positive(dn)) {
1684 in = ceph_get_inode(parent->d_sb, tvino);
1686 dout("new_inode badness\n");
1694 ret = fill_inode(in, NULL, &rde->inode, NULL, session,
1695 req->r_request_started, -1,
1696 &req->r_caps_reservation);
1698 pr_err("fill_inode badness on %p\n", in);
1699 if (d_really_is_negative(dn)) {
1700 /* avoid calling iput_final() in mds
1701 * dispatch threads */
1702 ceph_async_iput(in);
1709 if (d_really_is_negative(dn)) {
1710 if (ceph_security_xattr_deadlock(in)) {
1711 dout(" skip splicing dn %p to inode %p"
1712 " (security xattr deadlock)\n", dn, in);
1713 ceph_async_iput(in);
1718 err = splice_dentry(&dn, in);
1723 ceph_dentry(dn)->offset = rde->offset;
1725 update_dentry_lease(d_inode(parent), dn,
1726 rde->lease, req->r_session,
1727 req->r_request_started);
1729 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
1730 ret = fill_readdir_cache(d_inode(parent), dn,
1739 if (err == 0 && skipped == 0) {
1740 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
1741 req->r_readdir_cache_idx = cache_ctl.index;
1743 ceph_readdir_cache_release(&cache_ctl);
1744 dout("readdir_prepopulate done\n");
1748 bool ceph_inode_set_size(struct inode *inode, loff_t size)
1750 struct ceph_inode_info *ci = ceph_inode(inode);
1753 spin_lock(&ci->i_ceph_lock);
1754 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1755 i_size_write(inode, size);
1756 inode->i_blocks = calc_inode_blocks(size);
1758 ret = __ceph_should_report_size(ci);
1760 spin_unlock(&ci->i_ceph_lock);
1765 * Put reference to inode, but avoid calling iput_final() in current thread.
1766 * iput_final() may wait for reahahead pages. The wait can cause deadlock in
1769 void ceph_async_iput(struct inode *inode)
1774 if (atomic_add_unless(&inode->i_count, -1, 1))
1776 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1777 &ceph_inode(inode)->i_work))
1779 /* queue work failed, i_count must be at least 2 */
1784 * Write back inode data in a worker thread. (This can't be done
1785 * in the message handler context.)
1787 void ceph_queue_writeback(struct inode *inode)
1789 struct ceph_inode_info *ci = ceph_inode(inode);
1790 set_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask);
1793 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1795 dout("ceph_queue_writeback %p\n", inode);
1797 dout("ceph_queue_writeback %p already queued, mask=%lx\n",
1798 inode, ci->i_work_mask);
1804 * queue an async invalidation
1806 void ceph_queue_invalidate(struct inode *inode)
1808 struct ceph_inode_info *ci = ceph_inode(inode);
1809 set_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask);
1812 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1813 &ceph_inode(inode)->i_work)) {
1814 dout("ceph_queue_invalidate %p\n", inode);
1816 dout("ceph_queue_invalidate %p already queued, mask=%lx\n",
1817 inode, ci->i_work_mask);
1823 * Queue an async vmtruncate. If we fail to queue work, we will handle
1824 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1826 void ceph_queue_vmtruncate(struct inode *inode)
1828 struct ceph_inode_info *ci = ceph_inode(inode);
1829 set_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask);
1832 if (queue_work(ceph_inode_to_client(inode)->inode_wq,
1834 dout("ceph_queue_vmtruncate %p\n", inode);
1836 dout("ceph_queue_vmtruncate %p already queued, mask=%lx\n",
1837 inode, ci->i_work_mask);
1842 static void ceph_do_invalidate_pages(struct inode *inode)
1844 struct ceph_inode_info *ci = ceph_inode(inode);
1845 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1849 mutex_lock(&ci->i_truncate_mutex);
1851 if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
1852 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1853 inode, ceph_ino(inode));
1854 mapping_set_error(inode->i_mapping, -EIO);
1855 truncate_pagecache(inode, 0);
1856 mutex_unlock(&ci->i_truncate_mutex);
1860 spin_lock(&ci->i_ceph_lock);
1861 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1862 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1863 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1864 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1866 spin_unlock(&ci->i_ceph_lock);
1867 mutex_unlock(&ci->i_truncate_mutex);
1870 orig_gen = ci->i_rdcache_gen;
1871 spin_unlock(&ci->i_ceph_lock);
1873 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
1874 pr_err("invalidate_pages %p fails\n", inode);
1877 spin_lock(&ci->i_ceph_lock);
1878 if (orig_gen == ci->i_rdcache_gen &&
1879 orig_gen == ci->i_rdcache_revoking) {
1880 dout("invalidate_pages %p gen %d successful\n", inode,
1882 ci->i_rdcache_revoking--;
1885 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1886 inode, orig_gen, ci->i_rdcache_gen,
1887 ci->i_rdcache_revoking);
1888 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1891 spin_unlock(&ci->i_ceph_lock);
1892 mutex_unlock(&ci->i_truncate_mutex);
1895 ceph_check_caps(ci, 0, NULL);
1899 * Make sure any pending truncation is applied before doing anything
1900 * that may depend on it.
1902 void __ceph_do_pending_vmtruncate(struct inode *inode)
1904 struct ceph_inode_info *ci = ceph_inode(inode);
1906 int wrbuffer_refs, finish = 0;
1908 mutex_lock(&ci->i_truncate_mutex);
1910 spin_lock(&ci->i_ceph_lock);
1911 if (ci->i_truncate_pending == 0) {
1912 dout("__do_pending_vmtruncate %p none pending\n", inode);
1913 spin_unlock(&ci->i_ceph_lock);
1914 mutex_unlock(&ci->i_truncate_mutex);
1919 * make sure any dirty snapped pages are flushed before we
1920 * possibly truncate them.. so write AND block!
1922 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1923 spin_unlock(&ci->i_ceph_lock);
1924 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1926 filemap_write_and_wait_range(&inode->i_data, 0,
1927 inode->i_sb->s_maxbytes);
1931 /* there should be no reader or writer */
1932 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1934 to = ci->i_truncate_size;
1935 wrbuffer_refs = ci->i_wrbuffer_ref;
1936 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1937 ci->i_truncate_pending, to);
1938 spin_unlock(&ci->i_ceph_lock);
1940 truncate_pagecache(inode, to);
1942 spin_lock(&ci->i_ceph_lock);
1943 if (to == ci->i_truncate_size) {
1944 ci->i_truncate_pending = 0;
1947 spin_unlock(&ci->i_ceph_lock);
1951 mutex_unlock(&ci->i_truncate_mutex);
1953 if (wrbuffer_refs == 0)
1954 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1956 wake_up_all(&ci->i_cap_wq);
1959 static void ceph_inode_work(struct work_struct *work)
1961 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1963 struct inode *inode = &ci->vfs_inode;
1965 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) {
1966 dout("writeback %p\n", inode);
1967 filemap_fdatawrite(&inode->i_data);
1969 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask))
1970 ceph_do_invalidate_pages(inode);
1972 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask))
1973 __ceph_do_pending_vmtruncate(inode);
1981 static const struct inode_operations ceph_symlink_iops = {
1982 .get_link = simple_get_link,
1983 .setattr = ceph_setattr,
1984 .getattr = ceph_getattr,
1985 .listxattr = ceph_listxattr,
1988 int __ceph_setattr(struct inode *inode, struct iattr *attr)
1990 struct ceph_inode_info *ci = ceph_inode(inode);
1991 const unsigned int ia_valid = attr->ia_valid;
1992 struct ceph_mds_request *req;
1993 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
1994 struct ceph_cap_flush *prealloc_cf;
1996 int release = 0, dirtied = 0;
1999 int inode_dirty_flags = 0;
2000 bool lock_snap_rwsem = false;
2002 prealloc_cf = ceph_alloc_cap_flush();
2006 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
2009 ceph_free_cap_flush(prealloc_cf);
2010 return PTR_ERR(req);
2013 spin_lock(&ci->i_ceph_lock);
2014 issued = __ceph_caps_issued(ci, NULL);
2016 if (!ci->i_head_snapc &&
2017 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
2018 lock_snap_rwsem = true;
2019 if (!down_read_trylock(&mdsc->snap_rwsem)) {
2020 spin_unlock(&ci->i_ceph_lock);
2021 down_read(&mdsc->snap_rwsem);
2022 spin_lock(&ci->i_ceph_lock);
2023 issued = __ceph_caps_issued(ci, NULL);
2027 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
2029 if (ia_valid & ATTR_UID) {
2030 dout("setattr %p uid %d -> %d\n", inode,
2031 from_kuid(&init_user_ns, inode->i_uid),
2032 from_kuid(&init_user_ns, attr->ia_uid));
2033 if (issued & CEPH_CAP_AUTH_EXCL) {
2034 inode->i_uid = attr->ia_uid;
2035 dirtied |= CEPH_CAP_AUTH_EXCL;
2036 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2037 !uid_eq(attr->ia_uid, inode->i_uid)) {
2038 req->r_args.setattr.uid = cpu_to_le32(
2039 from_kuid(&init_user_ns, attr->ia_uid));
2040 mask |= CEPH_SETATTR_UID;
2041 release |= CEPH_CAP_AUTH_SHARED;
2044 if (ia_valid & ATTR_GID) {
2045 dout("setattr %p gid %d -> %d\n", inode,
2046 from_kgid(&init_user_ns, inode->i_gid),
2047 from_kgid(&init_user_ns, attr->ia_gid));
2048 if (issued & CEPH_CAP_AUTH_EXCL) {
2049 inode->i_gid = attr->ia_gid;
2050 dirtied |= CEPH_CAP_AUTH_EXCL;
2051 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2052 !gid_eq(attr->ia_gid, inode->i_gid)) {
2053 req->r_args.setattr.gid = cpu_to_le32(
2054 from_kgid(&init_user_ns, attr->ia_gid));
2055 mask |= CEPH_SETATTR_GID;
2056 release |= CEPH_CAP_AUTH_SHARED;
2059 if (ia_valid & ATTR_MODE) {
2060 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
2062 if (issued & CEPH_CAP_AUTH_EXCL) {
2063 inode->i_mode = attr->ia_mode;
2064 dirtied |= CEPH_CAP_AUTH_EXCL;
2065 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2066 attr->ia_mode != inode->i_mode) {
2067 inode->i_mode = attr->ia_mode;
2068 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
2069 mask |= CEPH_SETATTR_MODE;
2070 release |= CEPH_CAP_AUTH_SHARED;
2074 if (ia_valid & ATTR_ATIME) {
2075 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode,
2076 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
2077 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
2078 if (issued & CEPH_CAP_FILE_EXCL) {
2079 ci->i_time_warp_seq++;
2080 inode->i_atime = attr->ia_atime;
2081 dirtied |= CEPH_CAP_FILE_EXCL;
2082 } else if ((issued & CEPH_CAP_FILE_WR) &&
2083 timespec64_compare(&inode->i_atime,
2084 &attr->ia_atime) < 0) {
2085 inode->i_atime = attr->ia_atime;
2086 dirtied |= CEPH_CAP_FILE_WR;
2087 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2088 !timespec64_equal(&inode->i_atime, &attr->ia_atime)) {
2089 ceph_encode_timespec64(&req->r_args.setattr.atime,
2091 mask |= CEPH_SETATTR_ATIME;
2092 release |= CEPH_CAP_FILE_SHARED |
2093 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2096 if (ia_valid & ATTR_MTIME) {
2097 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode,
2098 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
2099 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
2100 if (issued & CEPH_CAP_FILE_EXCL) {
2101 ci->i_time_warp_seq++;
2102 inode->i_mtime = attr->ia_mtime;
2103 dirtied |= CEPH_CAP_FILE_EXCL;
2104 } else if ((issued & CEPH_CAP_FILE_WR) &&
2105 timespec64_compare(&inode->i_mtime,
2106 &attr->ia_mtime) < 0) {
2107 inode->i_mtime = attr->ia_mtime;
2108 dirtied |= CEPH_CAP_FILE_WR;
2109 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2110 !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) {
2111 ceph_encode_timespec64(&req->r_args.setattr.mtime,
2113 mask |= CEPH_SETATTR_MTIME;
2114 release |= CEPH_CAP_FILE_SHARED |
2115 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2118 if (ia_valid & ATTR_SIZE) {
2119 dout("setattr %p size %lld -> %lld\n", inode,
2120 inode->i_size, attr->ia_size);
2121 if ((issued & CEPH_CAP_FILE_EXCL) &&
2122 attr->ia_size > inode->i_size) {
2123 i_size_write(inode, attr->ia_size);
2124 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2125 ci->i_reported_size = attr->ia_size;
2126 dirtied |= CEPH_CAP_FILE_EXCL;
2127 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2128 attr->ia_size != inode->i_size) {
2129 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2130 req->r_args.setattr.old_size =
2131 cpu_to_le64(inode->i_size);
2132 mask |= CEPH_SETATTR_SIZE;
2133 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2134 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2138 /* these do nothing */
2139 if (ia_valid & ATTR_CTIME) {
2140 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2141 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
2142 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode,
2143 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
2144 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2145 only ? "ctime only" : "ignored");
2148 * if kernel wants to dirty ctime but nothing else,
2149 * we need to choose a cap to dirty under, or do
2150 * a almost-no-op setattr
2152 if (issued & CEPH_CAP_AUTH_EXCL)
2153 dirtied |= CEPH_CAP_AUTH_EXCL;
2154 else if (issued & CEPH_CAP_FILE_EXCL)
2155 dirtied |= CEPH_CAP_FILE_EXCL;
2156 else if (issued & CEPH_CAP_XATTR_EXCL)
2157 dirtied |= CEPH_CAP_XATTR_EXCL;
2159 mask |= CEPH_SETATTR_CTIME;
2162 if (ia_valid & ATTR_FILE)
2163 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
2166 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2168 inode->i_ctime = attr->ia_ctime;
2172 spin_unlock(&ci->i_ceph_lock);
2173 if (lock_snap_rwsem)
2174 up_read(&mdsc->snap_rwsem);
2176 if (inode_dirty_flags)
2177 __mark_inode_dirty(inode, inode_dirty_flags);
2181 req->r_inode = inode;
2183 req->r_inode_drop = release;
2184 req->r_args.setattr.mask = cpu_to_le32(mask);
2185 req->r_num_caps = 1;
2186 req->r_stamp = attr->ia_ctime;
2187 err = ceph_mdsc_do_request(mdsc, NULL, req);
2189 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
2190 ceph_cap_string(dirtied), mask);
2192 ceph_mdsc_put_request(req);
2193 ceph_free_cap_flush(prealloc_cf);
2195 if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
2196 __ceph_do_pending_vmtruncate(inode);
2204 int ceph_setattr(struct dentry *dentry, struct iattr *attr)
2206 struct inode *inode = d_inode(dentry);
2207 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
2210 if (ceph_snap(inode) != CEPH_NOSNAP)
2213 err = setattr_prepare(dentry, attr);
2217 if ((attr->ia_valid & ATTR_SIZE) &&
2218 attr->ia_size > max(inode->i_size, fsc->max_file_size))
2221 if ((attr->ia_valid & ATTR_SIZE) &&
2222 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size))
2225 err = __ceph_setattr(inode, attr);
2227 if (err >= 0 && (attr->ia_valid & ATTR_MODE))
2228 err = posix_acl_chmod(inode, attr->ia_mode);
2234 * Verify that we have a lease on the given mask. If not,
2235 * do a getattr against an mds.
2237 int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2238 int mask, bool force)
2240 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
2241 struct ceph_mds_client *mdsc = fsc->mdsc;
2242 struct ceph_mds_request *req;
2246 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2247 dout("do_getattr inode %p SNAPDIR\n", inode);
2251 dout("do_getattr inode %p mask %s mode 0%o\n",
2252 inode, ceph_cap_string(mask), inode->i_mode);
2253 if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
2256 mode = (mask & CEPH_STAT_RSTAT) ? USE_AUTH_MDS : USE_ANY_MDS;
2257 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode);
2259 return PTR_ERR(req);
2260 req->r_inode = inode;
2262 req->r_num_caps = 1;
2263 req->r_args.getattr.mask = cpu_to_le32(mask);
2264 req->r_locked_page = locked_page;
2265 err = ceph_mdsc_do_request(mdsc, NULL, req);
2266 if (locked_page && err == 0) {
2267 u64 inline_version = req->r_reply_info.targeti.inline_version;
2268 if (inline_version == 0) {
2269 /* the reply is supposed to contain inline data */
2271 } else if (inline_version == CEPH_INLINE_NONE) {
2274 err = req->r_reply_info.targeti.inline_len;
2277 ceph_mdsc_put_request(req);
2278 dout("do_getattr result=%d\n", err);
2284 * Check inode permissions. We verify we have a valid value for
2285 * the AUTH cap, then call the generic handler.
2287 int ceph_permission(struct inode *inode, int mask)
2291 if (mask & MAY_NOT_BLOCK)
2294 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
2297 err = generic_permission(inode, mask);
2301 /* Craft a mask of needed caps given a set of requested statx attrs. */
2302 static int statx_to_caps(u32 want)
2306 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME))
2307 mask |= CEPH_CAP_AUTH_SHARED;
2309 if (want & (STATX_NLINK|STATX_CTIME))
2310 mask |= CEPH_CAP_LINK_SHARED;
2312 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|
2314 mask |= CEPH_CAP_FILE_SHARED;
2316 if (want & (STATX_CTIME))
2317 mask |= CEPH_CAP_XATTR_SHARED;
2323 * Get all the attributes. If we have sufficient caps for the requested attrs,
2324 * then we can avoid talking to the MDS at all.
2326 int ceph_getattr(const struct path *path, struct kstat *stat,
2327 u32 request_mask, unsigned int flags)
2329 struct inode *inode = d_inode(path->dentry);
2330 struct ceph_inode_info *ci = ceph_inode(inode);
2331 u32 valid_mask = STATX_BASIC_STATS;
2334 /* Skip the getattr altogether if we're asked not to sync */
2335 if (!(flags & AT_STATX_DONT_SYNC)) {
2336 err = ceph_do_getattr(inode, statx_to_caps(request_mask),
2337 flags & AT_STATX_FORCE_SYNC);
2342 generic_fillattr(inode, stat);
2343 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
2346 * btime on newly-allocated inodes is 0, so if this is still set to
2347 * that, then assume that it's not valid.
2349 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) {
2350 stat->btime = ci->i_btime;
2351 valid_mask |= STATX_BTIME;
2354 if (ceph_snap(inode) == CEPH_NOSNAP)
2355 stat->dev = inode->i_sb->s_dev;
2357 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0;
2359 if (S_ISDIR(inode->i_mode)) {
2360 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
2362 stat->size = ci->i_rbytes;
2364 stat->size = ci->i_files + ci->i_subdirs;
2366 stat->blksize = 65536;
2368 * Some applications rely on the number of st_nlink
2369 * value on directories to be either 0 (if unlinked)
2370 * or 2 + number of subdirectories.
2372 if (stat->nlink == 1)
2373 /* '.' + '..' + subdirs */
2374 stat->nlink = 1 + 1 + ci->i_subdirs;
2377 stat->result_mask = request_mask & valid_mask;