1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
4 #include <linux/module.h>
6 #include <linux/slab.h>
7 #include <linux/string.h>
8 #include <linux/uaccess.h>
9 #include <linux/kernel.h>
10 #include <linux/writeback.h>
11 #include <linux/vmalloc.h>
12 #include <linux/xattr.h>
13 #include <linux/posix_acl.h>
14 #include <linux/random.h>
15 #include <linux/sort.h>
16 #include <linux/iversion.h>
19 #include "mds_client.h"
21 #include <linux/ceph/decode.h>
24 * Ceph inode operations
26 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
27 * setattr, etc.), xattr helpers, and helpers for assimilating
28 * metadata returned by the MDS into our cache.
30 * Also define helpers for doing asynchronous writeback, invalidation,
31 * and truncation for the benefit of those who can't afford to block
32 * (typically because they are in the message handler path).
35 static const struct inode_operations ceph_symlink_iops
;
37 static void ceph_inode_work(struct work_struct
*work
);
40 * find or create an inode, given the ceph ino number
42 static int ceph_set_ino_cb(struct inode
*inode
, void *data
)
44 struct ceph_inode_info
*ci
= ceph_inode(inode
);
45 struct ceph_mds_client
*mdsc
= ceph_sb_to_mdsc(inode
->i_sb
);
47 ci
->i_vino
= *(struct ceph_vino
*)data
;
48 inode
->i_ino
= ceph_vino_to_ino_t(ci
->i_vino
);
49 inode_set_iversion_raw(inode
, 0);
50 percpu_counter_inc(&mdsc
->metric
.total_inodes
);
55 struct inode
*ceph_get_inode(struct super_block
*sb
, struct ceph_vino vino
)
59 if (ceph_vino_is_reserved(vino
))
60 return ERR_PTR(-EREMOTEIO
);
62 inode
= iget5_locked(sb
, (unsigned long)vino
.ino
, ceph_ino_compare
,
63 ceph_set_ino_cb
, &vino
);
65 return ERR_PTR(-ENOMEM
);
67 dout("get_inode on %llu=%llx.%llx got %p new %d\n", ceph_present_inode(inode
),
68 ceph_vinop(inode
), inode
, !!(inode
->i_state
& I_NEW
));
73 * get/constuct snapdir inode for a given directory
75 struct inode
*ceph_get_snapdir(struct inode
*parent
)
77 struct ceph_vino vino
= {
78 .ino
= ceph_ino(parent
),
81 struct inode
*inode
= ceph_get_inode(parent
->i_sb
, vino
);
82 struct ceph_inode_info
*ci
= ceph_inode(inode
);
87 if (!S_ISDIR(parent
->i_mode
)) {
88 pr_warn_once("bad snapdir parent type (mode=0%o)\n",
90 return ERR_PTR(-ENOTDIR
);
93 if (!(inode
->i_state
& I_NEW
) && !S_ISDIR(inode
->i_mode
)) {
94 pr_warn_once("bad snapdir inode type (mode=0%o)\n",
96 return ERR_PTR(-ENOTDIR
);
99 inode
->i_mode
= parent
->i_mode
;
100 inode
->i_uid
= parent
->i_uid
;
101 inode
->i_gid
= parent
->i_gid
;
102 inode
->i_mtime
= parent
->i_mtime
;
103 inode
->i_ctime
= parent
->i_ctime
;
104 inode
->i_atime
= parent
->i_atime
;
106 ci
->i_btime
= ceph_inode(parent
)->i_btime
;
108 if (inode
->i_state
& I_NEW
) {
109 inode
->i_op
= &ceph_snapdir_iops
;
110 inode
->i_fop
= &ceph_snapdir_fops
;
111 ci
->i_snap_caps
= CEPH_CAP_PIN
; /* so we can open */
112 unlock_new_inode(inode
);
118 const struct inode_operations ceph_file_iops
= {
119 .permission
= ceph_permission
,
120 .setattr
= ceph_setattr
,
121 .getattr
= ceph_getattr
,
122 .listxattr
= ceph_listxattr
,
123 .get_acl
= ceph_get_acl
,
124 .set_acl
= ceph_set_acl
,
129 * We use a 'frag tree' to keep track of the MDS's directory fragments
130 * for a given inode (usually there is just a single fragment). We
131 * need to know when a child frag is delegated to a new MDS, or when
132 * it is flagged as replicated, so we can direct our requests
137 * find/create a frag in the tree
139 static struct ceph_inode_frag
*__get_or_create_frag(struct ceph_inode_info
*ci
,
143 struct rb_node
*parent
= NULL
;
144 struct ceph_inode_frag
*frag
;
147 p
= &ci
->i_fragtree
.rb_node
;
150 frag
= rb_entry(parent
, struct ceph_inode_frag
, node
);
151 c
= ceph_frag_compare(f
, frag
->frag
);
160 frag
= kmalloc(sizeof(*frag
), GFP_NOFS
);
162 return ERR_PTR(-ENOMEM
);
169 rb_link_node(&frag
->node
, parent
, p
);
170 rb_insert_color(&frag
->node
, &ci
->i_fragtree
);
172 dout("get_or_create_frag added %llx.%llx frag %x\n",
173 ceph_vinop(&ci
->vfs_inode
), f
);
178 * find a specific frag @f
180 struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
, u32 f
)
182 struct rb_node
*n
= ci
->i_fragtree
.rb_node
;
185 struct ceph_inode_frag
*frag
=
186 rb_entry(n
, struct ceph_inode_frag
, node
);
187 int c
= ceph_frag_compare(f
, frag
->frag
);
199 * Choose frag containing the given value @v. If @pfrag is
200 * specified, copy the frag delegation info to the caller if
203 static u32
__ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
204 struct ceph_inode_frag
*pfrag
, int *found
)
206 u32 t
= ceph_frag_make(0, 0);
207 struct ceph_inode_frag
*frag
;
215 WARN_ON(!ceph_frag_contains_value(t
, v
));
216 frag
= __ceph_find_frag(ci
, t
);
218 break; /* t is a leaf */
219 if (frag
->split_by
== 0) {
221 memcpy(pfrag
, frag
, sizeof(*pfrag
));
228 nway
= 1 << frag
->split_by
;
229 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v
, t
,
230 frag
->split_by
, nway
);
231 for (i
= 0; i
< nway
; i
++) {
232 n
= ceph_frag_make_child(t
, frag
->split_by
, i
);
233 if (ceph_frag_contains_value(n
, v
)) {
240 dout("choose_frag(%x) = %x\n", v
, t
);
245 u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
246 struct ceph_inode_frag
*pfrag
, int *found
)
249 mutex_lock(&ci
->i_fragtree_mutex
);
250 ret
= __ceph_choose_frag(ci
, v
, pfrag
, found
);
251 mutex_unlock(&ci
->i_fragtree_mutex
);
256 * Process dirfrag (delegation) info from the mds. Include leaf
257 * fragment in tree ONLY if ndist > 0. Otherwise, only
258 * branches/splits are included in i_fragtree)
260 static int ceph_fill_dirfrag(struct inode
*inode
,
261 struct ceph_mds_reply_dirfrag
*dirinfo
)
263 struct ceph_inode_info
*ci
= ceph_inode(inode
);
264 struct ceph_inode_frag
*frag
;
265 u32 id
= le32_to_cpu(dirinfo
->frag
);
266 int mds
= le32_to_cpu(dirinfo
->auth
);
267 int ndist
= le32_to_cpu(dirinfo
->ndist
);
272 spin_lock(&ci
->i_ceph_lock
);
274 diri_auth
= ci
->i_auth_cap
->mds
;
275 spin_unlock(&ci
->i_ceph_lock
);
277 if (mds
== -1) /* CDIR_AUTH_PARENT */
280 mutex_lock(&ci
->i_fragtree_mutex
);
281 if (ndist
== 0 && mds
== diri_auth
) {
282 /* no delegation info needed. */
283 frag
= __ceph_find_frag(ci
, id
);
286 if (frag
->split_by
== 0) {
287 /* tree leaf, remove */
288 dout("fill_dirfrag removed %llx.%llx frag %x"
289 " (no ref)\n", ceph_vinop(inode
), id
);
290 rb_erase(&frag
->node
, &ci
->i_fragtree
);
293 /* tree branch, keep and clear */
294 dout("fill_dirfrag cleared %llx.%llx frag %x"
295 " referral\n", ceph_vinop(inode
), id
);
303 /* find/add this frag to store mds delegation info */
304 frag
= __get_or_create_frag(ci
, id
);
306 /* this is not the end of the world; we can continue
307 with bad/inaccurate delegation info */
308 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
309 ceph_vinop(inode
), le32_to_cpu(dirinfo
->frag
));
315 frag
->ndist
= min_t(u32
, ndist
, CEPH_MAX_DIRFRAG_REP
);
316 for (i
= 0; i
< frag
->ndist
; i
++)
317 frag
->dist
[i
] = le32_to_cpu(dirinfo
->dist
[i
]);
318 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
319 ceph_vinop(inode
), frag
->frag
, frag
->ndist
);
322 mutex_unlock(&ci
->i_fragtree_mutex
);
326 static int frag_tree_split_cmp(const void *l
, const void *r
)
328 struct ceph_frag_tree_split
*ls
= (struct ceph_frag_tree_split
*)l
;
329 struct ceph_frag_tree_split
*rs
= (struct ceph_frag_tree_split
*)r
;
330 return ceph_frag_compare(le32_to_cpu(ls
->frag
),
331 le32_to_cpu(rs
->frag
));
334 static bool is_frag_child(u32 f
, struct ceph_inode_frag
*frag
)
337 return f
== ceph_frag_make(0, 0);
338 if (ceph_frag_bits(f
) != ceph_frag_bits(frag
->frag
) + frag
->split_by
)
340 return ceph_frag_contains_value(frag
->frag
, ceph_frag_value(f
));
343 static int ceph_fill_fragtree(struct inode
*inode
,
344 struct ceph_frag_tree_head
*fragtree
,
345 struct ceph_mds_reply_dirfrag
*dirinfo
)
347 struct ceph_inode_info
*ci
= ceph_inode(inode
);
348 struct ceph_inode_frag
*frag
, *prev_frag
= NULL
;
349 struct rb_node
*rb_node
;
350 unsigned i
, split_by
, nsplits
;
354 mutex_lock(&ci
->i_fragtree_mutex
);
355 nsplits
= le32_to_cpu(fragtree
->nsplits
);
356 if (nsplits
!= ci
->i_fragtree_nsplits
) {
358 } else if (nsplits
) {
359 i
= prandom_u32() % nsplits
;
360 id
= le32_to_cpu(fragtree
->splits
[i
].frag
);
361 if (!__ceph_find_frag(ci
, id
))
363 } else if (!RB_EMPTY_ROOT(&ci
->i_fragtree
)) {
364 rb_node
= rb_first(&ci
->i_fragtree
);
365 frag
= rb_entry(rb_node
, struct ceph_inode_frag
, node
);
366 if (frag
->frag
!= ceph_frag_make(0, 0) || rb_next(rb_node
))
369 if (!update
&& dirinfo
) {
370 id
= le32_to_cpu(dirinfo
->frag
);
371 if (id
!= __ceph_choose_frag(ci
, id
, NULL
, NULL
))
378 sort(fragtree
->splits
, nsplits
, sizeof(fragtree
->splits
[0]),
379 frag_tree_split_cmp
, NULL
);
382 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode
));
383 rb_node
= rb_first(&ci
->i_fragtree
);
384 for (i
= 0; i
< nsplits
; i
++) {
385 id
= le32_to_cpu(fragtree
->splits
[i
].frag
);
386 split_by
= le32_to_cpu(fragtree
->splits
[i
].by
);
387 if (split_by
== 0 || ceph_frag_bits(id
) + split_by
> 24) {
388 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
389 "frag %x split by %d\n", ceph_vinop(inode
),
390 i
, nsplits
, id
, split_by
);
395 frag
= rb_entry(rb_node
, struct ceph_inode_frag
, node
);
396 if (ceph_frag_compare(frag
->frag
, id
) >= 0) {
397 if (frag
->frag
!= id
)
400 rb_node
= rb_next(rb_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
--;
415 frag
= __get_or_create_frag(ci
, id
);
419 if (frag
->split_by
== 0)
420 ci
->i_fragtree_nsplits
++;
421 frag
->split_by
= split_by
;
422 dout(" frag %x split by %d\n", frag
->frag
, frag
->split_by
);
426 frag
= rb_entry(rb_node
, struct ceph_inode_frag
, node
);
427 rb_node
= rb_next(rb_node
);
428 /* delete stale split/leaf node */
429 if (frag
->split_by
> 0 ||
430 !is_frag_child(frag
->frag
, prev_frag
)) {
431 rb_erase(&frag
->node
, &ci
->i_fragtree
);
432 if (frag
->split_by
> 0)
433 ci
->i_fragtree_nsplits
--;
438 mutex_unlock(&ci
->i_fragtree_mutex
);
443 * initialize a newly allocated inode.
445 struct inode
*ceph_alloc_inode(struct super_block
*sb
)
447 struct ceph_inode_info
*ci
;
450 ci
= kmem_cache_alloc(ceph_inode_cachep
, GFP_NOFS
);
454 dout("alloc_inode %p\n", &ci
->vfs_inode
);
456 spin_lock_init(&ci
->i_ceph_lock
);
459 ci
->i_inline_version
= 0;
460 ci
->i_time_warp_seq
= 0;
461 ci
->i_ceph_flags
= 0;
462 atomic64_set(&ci
->i_ordered_count
, 1);
463 atomic64_set(&ci
->i_release_count
, 1);
464 atomic64_set(&ci
->i_complete_seq
[0], 0);
465 atomic64_set(&ci
->i_complete_seq
[1], 0);
466 ci
->i_symlink
= NULL
;
471 memset(&ci
->i_dir_layout
, 0, sizeof(ci
->i_dir_layout
));
472 memset(&ci
->i_cached_layout
, 0, sizeof(ci
->i_cached_layout
));
473 RCU_INIT_POINTER(ci
->i_layout
.pool_ns
, NULL
);
475 ci
->i_fragtree
= RB_ROOT
;
476 mutex_init(&ci
->i_fragtree_mutex
);
478 ci
->i_xattrs
.blob
= NULL
;
479 ci
->i_xattrs
.prealloc_blob
= NULL
;
480 ci
->i_xattrs
.dirty
= false;
481 ci
->i_xattrs
.index
= RB_ROOT
;
482 ci
->i_xattrs
.count
= 0;
483 ci
->i_xattrs
.names_size
= 0;
484 ci
->i_xattrs
.vals_size
= 0;
485 ci
->i_xattrs
.version
= 0;
486 ci
->i_xattrs
.index_version
= 0;
488 ci
->i_caps
= RB_ROOT
;
489 ci
->i_auth_cap
= NULL
;
490 ci
->i_dirty_caps
= 0;
491 ci
->i_flushing_caps
= 0;
492 INIT_LIST_HEAD(&ci
->i_dirty_item
);
493 INIT_LIST_HEAD(&ci
->i_flushing_item
);
494 ci
->i_prealloc_cap_flush
= NULL
;
495 INIT_LIST_HEAD(&ci
->i_cap_flush_list
);
496 init_waitqueue_head(&ci
->i_cap_wq
);
497 ci
->i_hold_caps_max
= 0;
498 INIT_LIST_HEAD(&ci
->i_cap_delay_list
);
499 INIT_LIST_HEAD(&ci
->i_cap_snaps
);
500 ci
->i_head_snapc
= NULL
;
503 ci
->i_last_rd
= ci
->i_last_wr
= jiffies
- 3600 * HZ
;
504 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++)
505 ci
->i_nr_by_mode
[i
] = 0;
507 mutex_init(&ci
->i_truncate_mutex
);
508 ci
->i_truncate_seq
= 0;
509 ci
->i_truncate_size
= 0;
510 ci
->i_truncate_pending
= 0;
513 ci
->i_reported_size
= 0;
514 ci
->i_wanted_max_size
= 0;
515 ci
->i_requested_max_size
= 0;
519 ci
->i_rdcache_ref
= 0;
523 ci
->i_wrbuffer_ref
= 0;
524 ci
->i_wrbuffer_ref_head
= 0;
525 atomic_set(&ci
->i_filelock_ref
, 0);
526 atomic_set(&ci
->i_shared_gen
, 1);
527 ci
->i_rdcache_gen
= 0;
528 ci
->i_rdcache_revoking
= 0;
530 INIT_LIST_HEAD(&ci
->i_unsafe_dirops
);
531 INIT_LIST_HEAD(&ci
->i_unsafe_iops
);
532 spin_lock_init(&ci
->i_unsafe_lock
);
534 ci
->i_snap_realm
= NULL
;
535 INIT_LIST_HEAD(&ci
->i_snap_realm_item
);
536 INIT_LIST_HEAD(&ci
->i_snap_flush_item
);
538 INIT_WORK(&ci
->i_work
, ceph_inode_work
);
540 memset(&ci
->i_btime
, '\0', sizeof(ci
->i_btime
));
542 ceph_fscache_inode_init(ci
);
544 return &ci
->vfs_inode
;
547 void ceph_free_inode(struct inode
*inode
)
549 struct ceph_inode_info
*ci
= ceph_inode(inode
);
551 kfree(ci
->i_symlink
);
552 kmem_cache_free(ceph_inode_cachep
, ci
);
555 void ceph_evict_inode(struct inode
*inode
)
557 struct ceph_inode_info
*ci
= ceph_inode(inode
);
558 struct ceph_mds_client
*mdsc
= ceph_sb_to_mdsc(inode
->i_sb
);
559 struct ceph_inode_frag
*frag
;
562 dout("evict_inode %p ino %llx.%llx\n", inode
, ceph_vinop(inode
));
564 percpu_counter_dec(&mdsc
->metric
.total_inodes
);
566 truncate_inode_pages_final(&inode
->i_data
);
569 ceph_fscache_unregister_inode_cookie(ci
);
571 __ceph_remove_caps(ci
);
573 if (__ceph_has_any_quota(ci
))
574 ceph_adjust_quota_realms_count(inode
, false);
577 * we may still have a snap_realm reference if there are stray
578 * caps in i_snap_caps.
580 if (ci
->i_snap_realm
) {
581 if (ceph_snap(inode
) == CEPH_NOSNAP
) {
582 dout(" dropping residual ref to snap realm %p\n",
584 ceph_change_snap_realm(inode
, NULL
);
586 ceph_put_snapid_map(mdsc
, ci
->i_snapid_map
);
587 ci
->i_snap_realm
= NULL
;
591 while ((n
= rb_first(&ci
->i_fragtree
)) != NULL
) {
592 frag
= rb_entry(n
, struct ceph_inode_frag
, node
);
593 rb_erase(n
, &ci
->i_fragtree
);
596 ci
->i_fragtree_nsplits
= 0;
598 __ceph_destroy_xattrs(ci
);
599 if (ci
->i_xattrs
.blob
)
600 ceph_buffer_put(ci
->i_xattrs
.blob
);
601 if (ci
->i_xattrs
.prealloc_blob
)
602 ceph_buffer_put(ci
->i_xattrs
.prealloc_blob
);
604 ceph_put_string(rcu_dereference_raw(ci
->i_layout
.pool_ns
));
605 ceph_put_string(rcu_dereference_raw(ci
->i_cached_layout
.pool_ns
));
608 static inline blkcnt_t
calc_inode_blocks(u64 size
)
610 return (size
+ (1<<9) - 1) >> 9;
614 * Helpers to fill in size, ctime, mtime, and atime. We have to be
615 * careful because either the client or MDS may have more up to date
616 * info, depending on which capabilities are held, and whether
617 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
618 * and size are monotonically increasing, except when utimes() or
619 * truncate() increments the corresponding _seq values.)
621 int ceph_fill_file_size(struct inode
*inode
, int issued
,
622 u32 truncate_seq
, u64 truncate_size
, u64 size
)
624 struct ceph_inode_info
*ci
= ceph_inode(inode
);
626 loff_t isize
= i_size_read(inode
);
628 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) > 0 ||
629 (truncate_seq
== ci
->i_truncate_seq
&& size
> isize
)) {
630 dout("size %lld -> %llu\n", isize
, size
);
631 if (size
> 0 && S_ISDIR(inode
->i_mode
)) {
632 pr_err("fill_file_size non-zero size for directory\n");
635 i_size_write(inode
, size
);
636 inode
->i_blocks
= calc_inode_blocks(size
);
637 ci
->i_reported_size
= size
;
638 if (truncate_seq
!= ci
->i_truncate_seq
) {
639 dout("truncate_seq %u -> %u\n",
640 ci
->i_truncate_seq
, truncate_seq
);
641 ci
->i_truncate_seq
= truncate_seq
;
643 /* the MDS should have revoked these caps */
644 WARN_ON_ONCE(issued
& (CEPH_CAP_FILE_EXCL
|
647 CEPH_CAP_FILE_LAZYIO
));
649 * If we hold relevant caps, or in the case where we're
650 * not the only client referencing this file and we
651 * don't hold those caps, then we need to check whether
652 * the file is either opened or mmaped
654 if ((issued
& (CEPH_CAP_FILE_CACHE
|
655 CEPH_CAP_FILE_BUFFER
)) ||
656 mapping_mapped(inode
->i_mapping
) ||
657 __ceph_is_file_opened(ci
)) {
658 ci
->i_truncate_pending
++;
663 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) >= 0 &&
664 ci
->i_truncate_size
!= truncate_size
) {
665 dout("truncate_size %lld -> %llu\n", ci
->i_truncate_size
,
667 ci
->i_truncate_size
= truncate_size
;
671 ceph_fscache_invalidate(inode
);
676 void ceph_fill_file_time(struct inode
*inode
, int issued
,
677 u64 time_warp_seq
, struct timespec64
*ctime
,
678 struct timespec64
*mtime
, struct timespec64
*atime
)
680 struct ceph_inode_info
*ci
= ceph_inode(inode
);
683 if (issued
& (CEPH_CAP_FILE_EXCL
|
685 CEPH_CAP_FILE_BUFFER
|
687 CEPH_CAP_XATTR_EXCL
)) {
688 if (ci
->i_version
== 0 ||
689 timespec64_compare(ctime
, &inode
->i_ctime
) > 0) {
690 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
691 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
692 ctime
->tv_sec
, ctime
->tv_nsec
);
693 inode
->i_ctime
= *ctime
;
695 if (ci
->i_version
== 0 ||
696 ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) > 0) {
697 /* the MDS did a utimes() */
698 dout("mtime %lld.%09ld -> %lld.%09ld "
700 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
701 mtime
->tv_sec
, mtime
->tv_nsec
,
702 ci
->i_time_warp_seq
, (int)time_warp_seq
);
704 inode
->i_mtime
= *mtime
;
705 inode
->i_atime
= *atime
;
706 ci
->i_time_warp_seq
= time_warp_seq
;
707 } else if (time_warp_seq
== ci
->i_time_warp_seq
) {
708 /* nobody did utimes(); take the max */
709 if (timespec64_compare(mtime
, &inode
->i_mtime
) > 0) {
710 dout("mtime %lld.%09ld -> %lld.%09ld inc\n",
711 inode
->i_mtime
.tv_sec
,
712 inode
->i_mtime
.tv_nsec
,
713 mtime
->tv_sec
, mtime
->tv_nsec
);
714 inode
->i_mtime
= *mtime
;
716 if (timespec64_compare(atime
, &inode
->i_atime
) > 0) {
717 dout("atime %lld.%09ld -> %lld.%09ld inc\n",
718 inode
->i_atime
.tv_sec
,
719 inode
->i_atime
.tv_nsec
,
720 atime
->tv_sec
, atime
->tv_nsec
);
721 inode
->i_atime
= *atime
;
723 } else if (issued
& CEPH_CAP_FILE_EXCL
) {
724 /* we did a utimes(); ignore mds values */
729 /* we have no write|excl caps; whatever the MDS says is true */
730 if (ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) >= 0) {
731 inode
->i_ctime
= *ctime
;
732 inode
->i_mtime
= *mtime
;
733 inode
->i_atime
= *atime
;
734 ci
->i_time_warp_seq
= time_warp_seq
;
739 if (warn
) /* time_warp_seq shouldn't go backwards */
740 dout("%p mds time_warp_seq %llu < %u\n",
741 inode
, time_warp_seq
, ci
->i_time_warp_seq
);
745 * Populate an inode based on info from mds. May be called on new or
748 int ceph_fill_inode(struct inode
*inode
, struct page
*locked_page
,
749 struct ceph_mds_reply_info_in
*iinfo
,
750 struct ceph_mds_reply_dirfrag
*dirinfo
,
751 struct ceph_mds_session
*session
, int cap_fmode
,
752 struct ceph_cap_reservation
*caps_reservation
)
754 struct ceph_mds_client
*mdsc
= ceph_sb_to_mdsc(inode
->i_sb
);
755 struct ceph_mds_reply_inode
*info
= iinfo
->in
;
756 struct ceph_inode_info
*ci
= ceph_inode(inode
);
757 int issued
, new_issued
, info_caps
;
758 struct timespec64 mtime
, atime
, ctime
;
759 struct ceph_buffer
*xattr_blob
= NULL
;
760 struct ceph_buffer
*old_blob
= NULL
;
761 struct ceph_string
*pool_ns
= NULL
;
762 struct ceph_cap
*new_cap
= NULL
;
765 bool queue_trunc
= false;
766 bool new_version
= false;
767 bool fill_inline
= false;
768 umode_t mode
= le32_to_cpu(info
->mode
);
769 dev_t rdev
= le32_to_cpu(info
->rdev
);
771 lockdep_assert_held(&mdsc
->snap_rwsem
);
773 dout("%s %p ino %llx.%llx v %llu had %llu\n", __func__
,
774 inode
, ceph_vinop(inode
), le64_to_cpu(info
->version
),
777 /* Once I_NEW is cleared, we can't change type or dev numbers */
778 if (inode
->i_state
& I_NEW
) {
779 inode
->i_mode
= mode
;
781 if (inode_wrong_type(inode
, mode
)) {
782 pr_warn_once("inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n",
783 ceph_vinop(inode
), inode
->i_mode
, mode
);
787 if ((S_ISCHR(mode
) || S_ISBLK(mode
)) && inode
->i_rdev
!= rdev
) {
788 pr_warn_once("dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n",
789 ceph_vinop(inode
), MAJOR(inode
->i_rdev
),
790 MINOR(inode
->i_rdev
), MAJOR(rdev
),
796 info_caps
= le32_to_cpu(info
->cap
.caps
);
798 /* prealloc new cap struct */
799 if (info_caps
&& ceph_snap(inode
) == CEPH_NOSNAP
) {
800 new_cap
= ceph_get_cap(mdsc
, caps_reservation
);
806 * prealloc xattr data, if it looks like we'll need it. only
807 * if len > 4 (meaning there are actually xattrs; the first 4
808 * bytes are the xattr count).
810 if (iinfo
->xattr_len
> 4) {
811 xattr_blob
= ceph_buffer_new(iinfo
->xattr_len
, GFP_NOFS
);
813 pr_err("%s ENOMEM xattr blob %d bytes\n", __func__
,
817 if (iinfo
->pool_ns_len
> 0)
818 pool_ns
= ceph_find_or_create_string(iinfo
->pool_ns_data
,
821 if (ceph_snap(inode
) != CEPH_NOSNAP
&& !ci
->i_snapid_map
)
822 ci
->i_snapid_map
= ceph_get_snapid_map(mdsc
, ceph_snap(inode
));
824 spin_lock(&ci
->i_ceph_lock
);
827 * provided version will be odd if inode value is projected,
828 * even if stable. skip the update if we have newer stable
829 * info (ours>=theirs, e.g. due to racing mds replies), unless
830 * we are getting projected (unstable) info (in which case the
831 * version is odd, and we want ours>theirs).
837 if (ci
->i_version
== 0 ||
838 ((info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
) &&
839 le64_to_cpu(info
->version
) > (ci
->i_version
& ~1)))
842 /* Update change_attribute */
843 inode_set_max_iversion_raw(inode
, iinfo
->change_attr
);
845 __ceph_caps_issued(ci
, &issued
);
846 issued
|= __ceph_caps_dirty(ci
);
847 new_issued
= ~issued
& info_caps
;
849 /* directories have fl_stripe_unit set to zero */
850 if (le32_to_cpu(info
->layout
.fl_stripe_unit
))
852 fls(le32_to_cpu(info
->layout
.fl_stripe_unit
)) - 1;
854 inode
->i_blkbits
= CEPH_BLOCK_SHIFT
;
856 __ceph_update_quota(ci
, iinfo
->max_bytes
, iinfo
->max_files
);
858 if ((new_version
|| (new_issued
& CEPH_CAP_AUTH_SHARED
)) &&
859 (issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
860 inode
->i_mode
= mode
;
861 inode
->i_uid
= make_kuid(&init_user_ns
, le32_to_cpu(info
->uid
));
862 inode
->i_gid
= make_kgid(&init_user_ns
, le32_to_cpu(info
->gid
));
863 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
864 from_kuid(&init_user_ns
, inode
->i_uid
),
865 from_kgid(&init_user_ns
, inode
->i_gid
));
866 ceph_decode_timespec64(&ci
->i_btime
, &iinfo
->btime
);
867 ceph_decode_timespec64(&ci
->i_snap_btime
, &iinfo
->snap_btime
);
870 if ((new_version
|| (new_issued
& CEPH_CAP_LINK_SHARED
)) &&
871 (issued
& CEPH_CAP_LINK_EXCL
) == 0)
872 set_nlink(inode
, le32_to_cpu(info
->nlink
));
874 if (new_version
|| (new_issued
& CEPH_CAP_ANY_RD
)) {
875 /* be careful with mtime, atime, size */
876 ceph_decode_timespec64(&atime
, &info
->atime
);
877 ceph_decode_timespec64(&mtime
, &info
->mtime
);
878 ceph_decode_timespec64(&ctime
, &info
->ctime
);
879 ceph_fill_file_time(inode
, issued
,
880 le32_to_cpu(info
->time_warp_seq
),
881 &ctime
, &mtime
, &atime
);
884 if (new_version
|| (info_caps
& CEPH_CAP_FILE_SHARED
)) {
885 ci
->i_files
= le64_to_cpu(info
->files
);
886 ci
->i_subdirs
= le64_to_cpu(info
->subdirs
);
890 (new_issued
& (CEPH_CAP_ANY_FILE_RD
| CEPH_CAP_ANY_FILE_WR
))) {
891 s64 old_pool
= ci
->i_layout
.pool_id
;
892 struct ceph_string
*old_ns
;
894 ceph_file_layout_from_legacy(&ci
->i_layout
, &info
->layout
);
895 old_ns
= rcu_dereference_protected(ci
->i_layout
.pool_ns
,
896 lockdep_is_held(&ci
->i_ceph_lock
));
897 rcu_assign_pointer(ci
->i_layout
.pool_ns
, pool_ns
);
899 if (ci
->i_layout
.pool_id
!= old_pool
|| pool_ns
!= old_ns
)
900 ci
->i_ceph_flags
&= ~CEPH_I_POOL_PERM
;
904 queue_trunc
= ceph_fill_file_size(inode
, issued
,
905 le32_to_cpu(info
->truncate_seq
),
906 le64_to_cpu(info
->truncate_size
),
907 le64_to_cpu(info
->size
));
908 /* only update max_size on auth cap */
909 if ((info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
) &&
910 ci
->i_max_size
!= le64_to_cpu(info
->max_size
)) {
911 dout("max_size %lld -> %llu\n", ci
->i_max_size
,
912 le64_to_cpu(info
->max_size
));
913 ci
->i_max_size
= le64_to_cpu(info
->max_size
);
917 /* layout and rstat are not tracked by capability, update them if
918 * the inode info is from auth mds */
919 if (new_version
|| (info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
)) {
920 if (S_ISDIR(inode
->i_mode
)) {
921 ci
->i_dir_layout
= iinfo
->dir_layout
;
922 ci
->i_rbytes
= le64_to_cpu(info
->rbytes
);
923 ci
->i_rfiles
= le64_to_cpu(info
->rfiles
);
924 ci
->i_rsubdirs
= le64_to_cpu(info
->rsubdirs
);
925 ci
->i_dir_pin
= iinfo
->dir_pin
;
926 ci
->i_rsnaps
= iinfo
->rsnaps
;
927 ceph_decode_timespec64(&ci
->i_rctime
, &info
->rctime
);
932 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
933 if ((ci
->i_xattrs
.version
== 0 || !(issued
& CEPH_CAP_XATTR_EXCL
)) &&
934 le64_to_cpu(info
->xattr_version
) > ci
->i_xattrs
.version
) {
935 if (ci
->i_xattrs
.blob
)
936 old_blob
= ci
->i_xattrs
.blob
;
937 ci
->i_xattrs
.blob
= xattr_blob
;
939 memcpy(ci
->i_xattrs
.blob
->vec
.iov_base
,
940 iinfo
->xattr_data
, iinfo
->xattr_len
);
941 ci
->i_xattrs
.version
= le64_to_cpu(info
->xattr_version
);
942 ceph_forget_all_cached_acls(inode
);
943 ceph_security_invalidate_secctx(inode
);
947 /* finally update i_version */
948 if (le64_to_cpu(info
->version
) > ci
->i_version
)
949 ci
->i_version
= le64_to_cpu(info
->version
);
951 inode
->i_mapping
->a_ops
= &ceph_aops
;
953 switch (inode
->i_mode
& S_IFMT
) {
958 inode
->i_blkbits
= PAGE_SHIFT
;
959 init_special_inode(inode
, inode
->i_mode
, rdev
);
960 inode
->i_op
= &ceph_file_iops
;
963 inode
->i_op
= &ceph_file_iops
;
964 inode
->i_fop
= &ceph_file_fops
;
967 inode
->i_op
= &ceph_symlink_iops
;
968 if (!ci
->i_symlink
) {
969 u32 symlen
= iinfo
->symlink_len
;
972 spin_unlock(&ci
->i_ceph_lock
);
974 if (symlen
!= i_size_read(inode
)) {
975 pr_err("%s %llx.%llx BAD symlink "
976 "size %lld\n", __func__
,
979 i_size_write(inode
, symlen
);
980 inode
->i_blocks
= calc_inode_blocks(symlen
);
984 sym
= kstrndup(iinfo
->symlink
, symlen
, GFP_NOFS
);
988 spin_lock(&ci
->i_ceph_lock
);
992 kfree(sym
); /* lost a race */
994 inode
->i_link
= ci
->i_symlink
;
997 inode
->i_op
= &ceph_dir_iops
;
998 inode
->i_fop
= &ceph_dir_fops
;
1001 pr_err("%s %llx.%llx BAD mode 0%o\n", __func__
,
1002 ceph_vinop(inode
), inode
->i_mode
);
1005 /* were we issued a capability? */
1007 if (ceph_snap(inode
) == CEPH_NOSNAP
) {
1008 ceph_add_cap(inode
, session
,
1009 le64_to_cpu(info
->cap
.cap_id
),
1011 le32_to_cpu(info
->cap
.wanted
),
1012 le32_to_cpu(info
->cap
.seq
),
1013 le32_to_cpu(info
->cap
.mseq
),
1014 le64_to_cpu(info
->cap
.realm
),
1015 info
->cap
.flags
, &new_cap
);
1017 /* set dir completion flag? */
1018 if (S_ISDIR(inode
->i_mode
) &&
1019 ci
->i_files
== 0 && ci
->i_subdirs
== 0 &&
1020 (info_caps
& CEPH_CAP_FILE_SHARED
) &&
1021 (issued
& CEPH_CAP_FILE_EXCL
) == 0 &&
1022 !__ceph_dir_is_complete(ci
)) {
1023 dout(" marking %p complete (empty)\n", inode
);
1024 i_size_write(inode
, 0);
1025 __ceph_dir_set_complete(ci
,
1026 atomic64_read(&ci
->i_release_count
),
1027 atomic64_read(&ci
->i_ordered_count
));
1032 dout(" %p got snap_caps %s\n", inode
,
1033 ceph_cap_string(info_caps
));
1034 ci
->i_snap_caps
|= info_caps
;
1038 if (iinfo
->inline_version
> 0 &&
1039 iinfo
->inline_version
>= ci
->i_inline_version
) {
1040 int cache_caps
= CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_LAZYIO
;
1041 ci
->i_inline_version
= iinfo
->inline_version
;
1042 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
1043 (locked_page
|| (info_caps
& cache_caps
)))
1047 if (cap_fmode
>= 0) {
1049 pr_warn("mds issued no caps on %llx.%llx\n",
1051 __ceph_touch_fmode(ci
, mdsc
, cap_fmode
);
1054 spin_unlock(&ci
->i_ceph_lock
);
1057 ceph_fill_inline_data(inode
, locked_page
,
1058 iinfo
->inline_data
, iinfo
->inline_len
);
1061 wake_up_all(&ci
->i_cap_wq
);
1063 /* queue truncate if we saw i_size decrease */
1065 ceph_queue_vmtruncate(inode
);
1067 /* populate frag tree */
1068 if (S_ISDIR(inode
->i_mode
))
1069 ceph_fill_fragtree(inode
, &info
->fragtree
, dirinfo
);
1071 /* update delegation info? */
1073 ceph_fill_dirfrag(inode
, dirinfo
);
1078 ceph_put_cap(mdsc
, new_cap
);
1079 ceph_buffer_put(old_blob
);
1080 ceph_buffer_put(xattr_blob
);
1081 ceph_put_string(pool_ns
);
1086 * caller should hold session s_mutex and dentry->d_lock.
1088 static void __update_dentry_lease(struct inode
*dir
, struct dentry
*dentry
,
1089 struct ceph_mds_reply_lease
*lease
,
1090 struct ceph_mds_session
*session
,
1091 unsigned long from_time
,
1092 struct ceph_mds_session
**old_lease_session
)
1094 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
1095 unsigned mask
= le16_to_cpu(lease
->mask
);
1096 long unsigned duration
= le32_to_cpu(lease
->duration_ms
);
1097 long unsigned ttl
= from_time
+ (duration
* HZ
) / 1000;
1098 long unsigned half_ttl
= from_time
+ (duration
* HZ
/ 2) / 1000;
1100 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1101 dentry
, duration
, ttl
);
1103 /* only track leases on regular dentries */
1104 if (ceph_snap(dir
) != CEPH_NOSNAP
)
1107 if (mask
& CEPH_LEASE_PRIMARY_LINK
)
1108 di
->flags
|= CEPH_DENTRY_PRIMARY_LINK
;
1110 di
->flags
&= ~CEPH_DENTRY_PRIMARY_LINK
;
1112 di
->lease_shared_gen
= atomic_read(&ceph_inode(dir
)->i_shared_gen
);
1113 if (!(mask
& CEPH_LEASE_VALID
)) {
1114 __ceph_dentry_dir_lease_touch(di
);
1118 if (di
->lease_gen
== atomic_read(&session
->s_cap_gen
) &&
1119 time_before(ttl
, di
->time
))
1120 return; /* we already have a newer lease. */
1122 if (di
->lease_session
&& di
->lease_session
!= session
) {
1123 *old_lease_session
= di
->lease_session
;
1124 di
->lease_session
= NULL
;
1127 if (!di
->lease_session
)
1128 di
->lease_session
= ceph_get_mds_session(session
);
1129 di
->lease_gen
= atomic_read(&session
->s_cap_gen
);
1130 di
->lease_seq
= le32_to_cpu(lease
->seq
);
1131 di
->lease_renew_after
= half_ttl
;
1132 di
->lease_renew_from
= 0;
1135 __ceph_dentry_lease_touch(di
);
1138 static inline void update_dentry_lease(struct inode
*dir
, struct dentry
*dentry
,
1139 struct ceph_mds_reply_lease
*lease
,
1140 struct ceph_mds_session
*session
,
1141 unsigned long from_time
)
1143 struct ceph_mds_session
*old_lease_session
= NULL
;
1144 spin_lock(&dentry
->d_lock
);
1145 __update_dentry_lease(dir
, dentry
, lease
, session
, from_time
,
1146 &old_lease_session
);
1147 spin_unlock(&dentry
->d_lock
);
1148 ceph_put_mds_session(old_lease_session
);
1152 * update dentry lease without having parent inode locked
1154 static void update_dentry_lease_careful(struct dentry
*dentry
,
1155 struct ceph_mds_reply_lease
*lease
,
1156 struct ceph_mds_session
*session
,
1157 unsigned long from_time
,
1158 char *dname
, u32 dname_len
,
1159 struct ceph_vino
*pdvino
,
1160 struct ceph_vino
*ptvino
)
1164 struct ceph_mds_session
*old_lease_session
= NULL
;
1166 spin_lock(&dentry
->d_lock
);
1167 /* make sure dentry's name matches target */
1168 if (dentry
->d_name
.len
!= dname_len
||
1169 memcmp(dentry
->d_name
.name
, dname
, dname_len
))
1172 dir
= d_inode(dentry
->d_parent
);
1173 /* make sure parent matches dvino */
1174 if (!ceph_ino_compare(dir
, pdvino
))
1177 /* make sure dentry's inode matches target. NULL ptvino means that
1178 * we expect a negative dentry */
1180 if (d_really_is_negative(dentry
))
1182 if (!ceph_ino_compare(d_inode(dentry
), ptvino
))
1185 if (d_really_is_positive(dentry
))
1189 __update_dentry_lease(dir
, dentry
, lease
, session
,
1190 from_time
, &old_lease_session
);
1192 spin_unlock(&dentry
->d_lock
);
1193 ceph_put_mds_session(old_lease_session
);
1197 * splice a dentry to an inode.
1198 * caller must hold directory i_mutex for this to be safe.
1200 static int splice_dentry(struct dentry
**pdn
, struct inode
*in
)
1202 struct dentry
*dn
= *pdn
;
1203 struct dentry
*realdn
;
1205 BUG_ON(d_inode(dn
));
1207 if (S_ISDIR(in
->i_mode
)) {
1208 /* If inode is directory, d_splice_alias() below will remove
1209 * 'realdn' from its origin parent. We need to ensure that
1210 * origin parent's readdir cache will not reference 'realdn'
1212 realdn
= d_find_any_alias(in
);
1214 struct ceph_dentry_info
*di
= ceph_dentry(realdn
);
1215 spin_lock(&realdn
->d_lock
);
1217 realdn
->d_op
->d_prune(realdn
);
1220 di
->lease_shared_gen
= 0;
1223 spin_unlock(&realdn
->d_lock
);
1228 /* dn must be unhashed */
1229 if (!d_unhashed(dn
))
1231 realdn
= d_splice_alias(in
, dn
);
1232 if (IS_ERR(realdn
)) {
1233 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1234 PTR_ERR(realdn
), dn
, in
, ceph_vinop(in
));
1235 return PTR_ERR(realdn
);
1239 dout("dn %p (%d) spliced with %p (%d) "
1240 "inode %p ino %llx.%llx\n",
1242 realdn
, d_count(realdn
),
1243 d_inode(realdn
), ceph_vinop(d_inode(realdn
)));
1247 BUG_ON(!ceph_dentry(dn
));
1248 dout("dn %p attached to %p ino %llx.%llx\n",
1249 dn
, d_inode(dn
), ceph_vinop(d_inode(dn
)));
1255 * Incorporate results into the local cache. This is either just
1256 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1259 * A reply may contain
1260 * a directory inode along with a dentry.
1261 * and/or a target inode
1263 * Called with snap_rwsem (read).
1265 int ceph_fill_trace(struct super_block
*sb
, struct ceph_mds_request
*req
)
1267 struct ceph_mds_session
*session
= req
->r_session
;
1268 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1269 struct inode
*in
= NULL
;
1270 struct ceph_vino tvino
, dvino
;
1271 struct ceph_fs_client
*fsc
= ceph_sb_to_client(sb
);
1274 dout("fill_trace %p is_dentry %d is_target %d\n", req
,
1275 rinfo
->head
->is_dentry
, rinfo
->head
->is_target
);
1277 if (!rinfo
->head
->is_target
&& !rinfo
->head
->is_dentry
) {
1278 dout("fill_trace reply is empty!\n");
1279 if (rinfo
->head
->result
== 0 && req
->r_parent
)
1280 ceph_invalidate_dir_request(req
);
1284 if (rinfo
->head
->is_dentry
) {
1285 struct inode
*dir
= req
->r_parent
;
1288 err
= ceph_fill_inode(dir
, NULL
, &rinfo
->diri
,
1289 rinfo
->dirfrag
, session
, -1,
1290 &req
->r_caps_reservation
);
1297 if (dir
&& req
->r_op
== CEPH_MDS_OP_LOOKUPNAME
&&
1298 test_bit(CEPH_MDS_R_PARENT_LOCKED
, &req
->r_req_flags
) &&
1299 !test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
)) {
1301 struct dentry
*dn
, *parent
;
1303 BUG_ON(!rinfo
->head
->is_target
);
1304 BUG_ON(req
->r_dentry
);
1306 parent
= d_find_any_alias(dir
);
1309 dname
.name
= rinfo
->dname
;
1310 dname
.len
= rinfo
->dname_len
;
1311 dname
.hash
= full_name_hash(parent
, dname
.name
, dname
.len
);
1312 tvino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1313 tvino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1315 dn
= d_lookup(parent
, &dname
);
1316 dout("d_lookup on parent=%p name=%.*s got %p\n",
1317 parent
, dname
.len
, dname
.name
, dn
);
1320 dn
= d_alloc(parent
, &dname
);
1321 dout("d_alloc %p '%.*s' = %p\n", parent
,
1322 dname
.len
, dname
.name
, dn
);
1329 } else if (d_really_is_positive(dn
) &&
1330 (ceph_ino(d_inode(dn
)) != tvino
.ino
||
1331 ceph_snap(d_inode(dn
)) != tvino
.snap
)) {
1332 dout(" dn %p points to wrong inode %p\n",
1334 ceph_dir_clear_ordered(dir
);
1345 if (rinfo
->head
->is_target
) {
1346 /* Should be filled in by handle_reply */
1347 BUG_ON(!req
->r_target_inode
);
1349 in
= req
->r_target_inode
;
1350 err
= ceph_fill_inode(in
, req
->r_locked_page
, &rinfo
->targeti
,
1352 (!test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
) &&
1353 !test_bit(CEPH_MDS_R_ASYNC
, &req
->r_req_flags
) &&
1354 rinfo
->head
->result
== 0) ? req
->r_fmode
: -1,
1355 &req
->r_caps_reservation
);
1357 pr_err("ceph_fill_inode badness %p %llx.%llx\n",
1358 in
, ceph_vinop(in
));
1359 req
->r_target_inode
= NULL
;
1360 if (in
->i_state
& I_NEW
)
1361 discard_new_inode(in
);
1366 if (in
->i_state
& I_NEW
)
1367 unlock_new_inode(in
);
1371 * ignore null lease/binding on snapdir ENOENT, or else we
1372 * will have trouble splicing in the virtual snapdir later
1374 if (rinfo
->head
->is_dentry
&&
1375 !test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
) &&
1376 test_bit(CEPH_MDS_R_PARENT_LOCKED
, &req
->r_req_flags
) &&
1377 (rinfo
->head
->is_target
|| strncmp(req
->r_dentry
->d_name
.name
,
1378 fsc
->mount_options
->snapdir_name
,
1379 req
->r_dentry
->d_name
.len
))) {
1381 * lookup link rename : null -> possibly existing inode
1382 * mknod symlink mkdir : null -> new inode
1383 * unlink : linked -> null
1385 struct inode
*dir
= req
->r_parent
;
1386 struct dentry
*dn
= req
->r_dentry
;
1387 bool have_dir_cap
, have_lease
;
1391 BUG_ON(d_inode(dn
->d_parent
) != dir
);
1393 dvino
.ino
= le64_to_cpu(rinfo
->diri
.in
->ino
);
1394 dvino
.snap
= le64_to_cpu(rinfo
->diri
.in
->snapid
);
1396 BUG_ON(ceph_ino(dir
) != dvino
.ino
);
1397 BUG_ON(ceph_snap(dir
) != dvino
.snap
);
1399 /* do we have a lease on the whole dir? */
1401 (le32_to_cpu(rinfo
->diri
.in
->cap
.caps
) &
1402 CEPH_CAP_FILE_SHARED
);
1404 /* do we have a dn lease? */
1405 have_lease
= have_dir_cap
||
1406 le32_to_cpu(rinfo
->dlease
->duration_ms
);
1408 dout("fill_trace no dentry lease or dir cap\n");
1411 if (req
->r_old_dentry
&& req
->r_op
== CEPH_MDS_OP_RENAME
) {
1412 struct inode
*olddir
= req
->r_old_dentry_dir
;
1415 dout(" src %p '%pd' dst %p '%pd'\n",
1419 dout("fill_trace doing d_move %p -> %p\n",
1420 req
->r_old_dentry
, dn
);
1422 /* d_move screws up sibling dentries' offsets */
1423 ceph_dir_clear_ordered(dir
);
1424 ceph_dir_clear_ordered(olddir
);
1426 d_move(req
->r_old_dentry
, dn
);
1427 dout(" src %p '%pd' dst %p '%pd'\n",
1432 /* ensure target dentry is invalidated, despite
1433 rehashing bug in vfs_rename_dir */
1434 ceph_invalidate_dentry_lease(dn
);
1436 dout("dn %p gets new offset %lld\n", req
->r_old_dentry
,
1437 ceph_dentry(req
->r_old_dentry
)->offset
);
1439 /* swap r_dentry and r_old_dentry in case that
1440 * splice_dentry() gets called later. This is safe
1441 * because no other place will use them */
1442 req
->r_dentry
= req
->r_old_dentry
;
1443 req
->r_old_dentry
= dn
;
1448 if (!rinfo
->head
->is_target
) {
1449 dout("fill_trace null dentry\n");
1450 if (d_really_is_positive(dn
)) {
1451 dout("d_delete %p\n", dn
);
1452 ceph_dir_clear_ordered(dir
);
1454 } else if (have_lease
) {
1457 update_dentry_lease(dir
, dn
,
1458 rinfo
->dlease
, session
,
1459 req
->r_request_started
);
1464 /* attach proper inode */
1465 if (d_really_is_negative(dn
)) {
1466 ceph_dir_clear_ordered(dir
);
1468 err
= splice_dentry(&req
->r_dentry
, in
);
1471 dn
= req
->r_dentry
; /* may have spliced */
1472 } else if (d_really_is_positive(dn
) && d_inode(dn
) != in
) {
1473 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1474 dn
, d_inode(dn
), ceph_vinop(d_inode(dn
)),
1481 update_dentry_lease(dir
, dn
,
1482 rinfo
->dlease
, session
,
1483 req
->r_request_started
);
1485 dout(" final dn %p\n", dn
);
1486 } else if ((req
->r_op
== CEPH_MDS_OP_LOOKUPSNAP
||
1487 req
->r_op
== CEPH_MDS_OP_MKSNAP
) &&
1488 test_bit(CEPH_MDS_R_PARENT_LOCKED
, &req
->r_req_flags
) &&
1489 !test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
)) {
1490 struct inode
*dir
= req
->r_parent
;
1492 /* fill out a snapdir LOOKUPSNAP dentry */
1494 BUG_ON(ceph_snap(dir
) != CEPH_SNAPDIR
);
1495 BUG_ON(!req
->r_dentry
);
1496 dout(" linking snapped dir %p to dn %p\n", in
, req
->r_dentry
);
1497 ceph_dir_clear_ordered(dir
);
1499 err
= splice_dentry(&req
->r_dentry
, in
);
1502 } else if (rinfo
->head
->is_dentry
&& req
->r_dentry
) {
1503 /* parent inode is not locked, be carefull */
1504 struct ceph_vino
*ptvino
= NULL
;
1505 dvino
.ino
= le64_to_cpu(rinfo
->diri
.in
->ino
);
1506 dvino
.snap
= le64_to_cpu(rinfo
->diri
.in
->snapid
);
1507 if (rinfo
->head
->is_target
) {
1508 tvino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1509 tvino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1512 update_dentry_lease_careful(req
->r_dentry
, rinfo
->dlease
,
1513 session
, req
->r_request_started
,
1514 rinfo
->dname
, rinfo
->dname_len
,
1518 dout("fill_trace done err=%d\n", err
);
1523 * Prepopulate our cache with readdir results, leases, etc.
1525 static int readdir_prepopulate_inodes_only(struct ceph_mds_request
*req
,
1526 struct ceph_mds_session
*session
)
1528 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1531 for (i
= 0; i
< rinfo
->dir_nr
; i
++) {
1532 struct ceph_mds_reply_dir_entry
*rde
= rinfo
->dir_entries
+ i
;
1533 struct ceph_vino vino
;
1537 vino
.ino
= le64_to_cpu(rde
->inode
.in
->ino
);
1538 vino
.snap
= le64_to_cpu(rde
->inode
.in
->snapid
);
1540 in
= ceph_get_inode(req
->r_dentry
->d_sb
, vino
);
1543 dout("new_inode badness got %d\n", err
);
1546 rc
= ceph_fill_inode(in
, NULL
, &rde
->inode
, NULL
, session
,
1547 -1, &req
->r_caps_reservation
);
1549 pr_err("ceph_fill_inode badness on %p got %d\n",
1552 if (in
->i_state
& I_NEW
) {
1554 discard_new_inode(in
);
1556 } else if (in
->i_state
& I_NEW
) {
1557 unlock_new_inode(in
);
1566 void ceph_readdir_cache_release(struct ceph_readdir_cache_control
*ctl
)
1570 put_page(ctl
->page
);
1575 static int fill_readdir_cache(struct inode
*dir
, struct dentry
*dn
,
1576 struct ceph_readdir_cache_control
*ctl
,
1577 struct ceph_mds_request
*req
)
1579 struct ceph_inode_info
*ci
= ceph_inode(dir
);
1580 unsigned nsize
= PAGE_SIZE
/ sizeof(struct dentry
*);
1581 unsigned idx
= ctl
->index
% nsize
;
1582 pgoff_t pgoff
= ctl
->index
/ nsize
;
1584 if (!ctl
->page
|| pgoff
!= page_index(ctl
->page
)) {
1585 ceph_readdir_cache_release(ctl
);
1587 ctl
->page
= grab_cache_page(&dir
->i_data
, pgoff
);
1589 ctl
->page
= find_lock_page(&dir
->i_data
, pgoff
);
1592 return idx
== 0 ? -ENOMEM
: 0;
1594 /* reading/filling the cache are serialized by
1595 * i_mutex, no need to use page lock */
1596 unlock_page(ctl
->page
);
1597 ctl
->dentries
= kmap(ctl
->page
);
1599 memset(ctl
->dentries
, 0, PAGE_SIZE
);
1602 if (req
->r_dir_release_cnt
== atomic64_read(&ci
->i_release_count
) &&
1603 req
->r_dir_ordered_cnt
== atomic64_read(&ci
->i_ordered_count
)) {
1604 dout("readdir cache dn %p idx %d\n", dn
, ctl
->index
);
1605 ctl
->dentries
[idx
] = dn
;
1608 dout("disable readdir cache\n");
1614 int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
1615 struct ceph_mds_session
*session
)
1617 struct dentry
*parent
= req
->r_dentry
;
1618 struct ceph_inode_info
*ci
= ceph_inode(d_inode(parent
));
1619 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1623 int err
= 0, skipped
= 0, ret
, i
;
1624 u32 frag
= le32_to_cpu(req
->r_args
.readdir
.frag
);
1627 struct ceph_readdir_cache_control cache_ctl
= {};
1629 if (test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
))
1630 return readdir_prepopulate_inodes_only(req
, session
);
1632 if (rinfo
->hash_order
) {
1634 last_hash
= ceph_str_hash(ci
->i_dir_layout
.dl_dir_hash
,
1636 strlen(req
->r_path2
));
1637 last_hash
= ceph_frag_value(last_hash
);
1638 } else if (rinfo
->offset_hash
) {
1639 /* mds understands offset_hash */
1640 WARN_ON_ONCE(req
->r_readdir_offset
!= 2);
1641 last_hash
= le32_to_cpu(req
->r_args
.readdir
.offset_hash
);
1645 if (rinfo
->dir_dir
&&
1646 le32_to_cpu(rinfo
->dir_dir
->frag
) != frag
) {
1647 dout("readdir_prepopulate got new frag %x -> %x\n",
1648 frag
, le32_to_cpu(rinfo
->dir_dir
->frag
));
1649 frag
= le32_to_cpu(rinfo
->dir_dir
->frag
);
1650 if (!rinfo
->hash_order
)
1651 req
->r_readdir_offset
= 2;
1654 if (le32_to_cpu(rinfo
->head
->op
) == CEPH_MDS_OP_LSSNAP
) {
1655 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1656 rinfo
->dir_nr
, parent
);
1658 dout("readdir_prepopulate %d items under dn %p\n",
1659 rinfo
->dir_nr
, parent
);
1661 ceph_fill_dirfrag(d_inode(parent
), rinfo
->dir_dir
);
1663 if (ceph_frag_is_leftmost(frag
) &&
1664 req
->r_readdir_offset
== 2 &&
1665 !(rinfo
->hash_order
&& last_hash
)) {
1666 /* note dir version at start of readdir so we can
1667 * tell if any dentries get dropped */
1668 req
->r_dir_release_cnt
=
1669 atomic64_read(&ci
->i_release_count
);
1670 req
->r_dir_ordered_cnt
=
1671 atomic64_read(&ci
->i_ordered_count
);
1672 req
->r_readdir_cache_idx
= 0;
1676 cache_ctl
.index
= req
->r_readdir_cache_idx
;
1677 fpos_offset
= req
->r_readdir_offset
;
1679 /* FIXME: release caps/leases if error occurs */
1680 for (i
= 0; i
< rinfo
->dir_nr
; i
++) {
1681 struct ceph_mds_reply_dir_entry
*rde
= rinfo
->dir_entries
+ i
;
1682 struct ceph_vino tvino
;
1684 dname
.name
= rde
->name
;
1685 dname
.len
= rde
->name_len
;
1686 dname
.hash
= full_name_hash(parent
, dname
.name
, dname
.len
);
1688 tvino
.ino
= le64_to_cpu(rde
->inode
.in
->ino
);
1689 tvino
.snap
= le64_to_cpu(rde
->inode
.in
->snapid
);
1691 if (rinfo
->hash_order
) {
1692 u32 hash
= ceph_str_hash(ci
->i_dir_layout
.dl_dir_hash
,
1693 rde
->name
, rde
->name_len
);
1694 hash
= ceph_frag_value(hash
);
1695 if (hash
!= last_hash
)
1698 rde
->offset
= ceph_make_fpos(hash
, fpos_offset
++, true);
1700 rde
->offset
= ceph_make_fpos(frag
, fpos_offset
++, false);
1704 dn
= d_lookup(parent
, &dname
);
1705 dout("d_lookup on parent=%p name=%.*s got %p\n",
1706 parent
, dname
.len
, dname
.name
, dn
);
1709 dn
= d_alloc(parent
, &dname
);
1710 dout("d_alloc %p '%.*s' = %p\n", parent
,
1711 dname
.len
, dname
.name
, dn
);
1713 dout("d_alloc badness\n");
1717 } else if (d_really_is_positive(dn
) &&
1718 (ceph_ino(d_inode(dn
)) != tvino
.ino
||
1719 ceph_snap(d_inode(dn
)) != tvino
.snap
)) {
1720 struct ceph_dentry_info
*di
= ceph_dentry(dn
);
1721 dout(" dn %p points to wrong inode %p\n",
1724 spin_lock(&dn
->d_lock
);
1725 if (di
->offset
> 0 &&
1726 di
->lease_shared_gen
==
1727 atomic_read(&ci
->i_shared_gen
)) {
1728 __ceph_dir_clear_ordered(ci
);
1731 spin_unlock(&dn
->d_lock
);
1739 if (d_really_is_positive(dn
)) {
1742 in
= ceph_get_inode(parent
->d_sb
, tvino
);
1744 dout("new_inode badness\n");
1752 ret
= ceph_fill_inode(in
, NULL
, &rde
->inode
, NULL
, session
,
1753 -1, &req
->r_caps_reservation
);
1755 pr_err("ceph_fill_inode badness on %p\n", in
);
1756 if (d_really_is_negative(dn
)) {
1757 if (in
->i_state
& I_NEW
) {
1759 discard_new_inode(in
);
1767 if (in
->i_state
& I_NEW
)
1768 unlock_new_inode(in
);
1770 if (d_really_is_negative(dn
)) {
1771 if (ceph_security_xattr_deadlock(in
)) {
1772 dout(" skip splicing dn %p to inode %p"
1773 " (security xattr deadlock)\n", dn
, in
);
1779 err
= splice_dentry(&dn
, in
);
1784 ceph_dentry(dn
)->offset
= rde
->offset
;
1786 update_dentry_lease(d_inode(parent
), dn
,
1787 rde
->lease
, req
->r_session
,
1788 req
->r_request_started
);
1790 if (err
== 0 && skipped
== 0 && cache_ctl
.index
>= 0) {
1791 ret
= fill_readdir_cache(d_inode(parent
), dn
,
1800 if (err
== 0 && skipped
== 0) {
1801 set_bit(CEPH_MDS_R_DID_PREPOPULATE
, &req
->r_req_flags
);
1802 req
->r_readdir_cache_idx
= cache_ctl
.index
;
1804 ceph_readdir_cache_release(&cache_ctl
);
1805 dout("readdir_prepopulate done\n");
1809 bool ceph_inode_set_size(struct inode
*inode
, loff_t size
)
1811 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1814 spin_lock(&ci
->i_ceph_lock
);
1815 dout("set_size %p %llu -> %llu\n", inode
, i_size_read(inode
), size
);
1816 i_size_write(inode
, size
);
1817 inode
->i_blocks
= calc_inode_blocks(size
);
1819 ret
= __ceph_should_report_size(ci
);
1821 spin_unlock(&ci
->i_ceph_lock
);
1825 void ceph_queue_inode_work(struct inode
*inode
, int work_bit
)
1827 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1828 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1829 set_bit(work_bit
, &ci
->i_work_mask
);
1832 if (queue_work(fsc
->inode_wq
, &ci
->i_work
)) {
1833 dout("queue_inode_work %p, mask=%lx\n", inode
, ci
->i_work_mask
);
1835 dout("queue_inode_work %p already queued, mask=%lx\n",
1836 inode
, ci
->i_work_mask
);
1841 static void ceph_do_invalidate_pages(struct inode
*inode
)
1843 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1844 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1848 mutex_lock(&ci
->i_truncate_mutex
);
1850 if (READ_ONCE(fsc
->mount_state
) >= CEPH_MOUNT_SHUTDOWN
) {
1851 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1852 inode
, ceph_ino(inode
));
1853 mapping_set_error(inode
->i_mapping
, -EIO
);
1854 truncate_pagecache(inode
, 0);
1855 mutex_unlock(&ci
->i_truncate_mutex
);
1859 spin_lock(&ci
->i_ceph_lock
);
1860 dout("invalidate_pages %p gen %d revoking %d\n", inode
,
1861 ci
->i_rdcache_gen
, ci
->i_rdcache_revoking
);
1862 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
1863 if (__ceph_caps_revoking_other(ci
, NULL
, CEPH_CAP_FILE_CACHE
))
1865 spin_unlock(&ci
->i_ceph_lock
);
1866 mutex_unlock(&ci
->i_truncate_mutex
);
1869 orig_gen
= ci
->i_rdcache_gen
;
1870 spin_unlock(&ci
->i_ceph_lock
);
1872 ceph_fscache_invalidate(inode
);
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
, 0, 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
);
1975 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS
, &ci
->i_work_mask
))
1976 ceph_check_caps(ci
, 0, NULL
);
1978 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS
, &ci
->i_work_mask
))
1979 ceph_flush_snaps(ci
, NULL
);
1987 static const struct inode_operations ceph_symlink_iops
= {
1988 .get_link
= simple_get_link
,
1989 .setattr
= ceph_setattr
,
1990 .getattr
= ceph_getattr
,
1991 .listxattr
= ceph_listxattr
,
1994 int __ceph_setattr(struct inode
*inode
, struct iattr
*attr
)
1996 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1997 unsigned int ia_valid
= attr
->ia_valid
;
1998 struct ceph_mds_request
*req
;
1999 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2000 struct ceph_cap_flush
*prealloc_cf
;
2002 int release
= 0, dirtied
= 0;
2005 int inode_dirty_flags
= 0;
2006 bool lock_snap_rwsem
= false;
2008 prealloc_cf
= ceph_alloc_cap_flush();
2012 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_SETATTR
,
2015 ceph_free_cap_flush(prealloc_cf
);
2016 return PTR_ERR(req
);
2019 spin_lock(&ci
->i_ceph_lock
);
2020 issued
= __ceph_caps_issued(ci
, NULL
);
2022 if (!ci
->i_head_snapc
&&
2023 (issued
& (CEPH_CAP_ANY_EXCL
| CEPH_CAP_FILE_WR
))) {
2024 lock_snap_rwsem
= true;
2025 if (!down_read_trylock(&mdsc
->snap_rwsem
)) {
2026 spin_unlock(&ci
->i_ceph_lock
);
2027 down_read(&mdsc
->snap_rwsem
);
2028 spin_lock(&ci
->i_ceph_lock
);
2029 issued
= __ceph_caps_issued(ci
, NULL
);
2033 dout("setattr %p issued %s\n", inode
, ceph_cap_string(issued
));
2035 if (ia_valid
& ATTR_UID
) {
2036 dout("setattr %p uid %d -> %d\n", inode
,
2037 from_kuid(&init_user_ns
, inode
->i_uid
),
2038 from_kuid(&init_user_ns
, attr
->ia_uid
));
2039 if (issued
& CEPH_CAP_AUTH_EXCL
) {
2040 inode
->i_uid
= attr
->ia_uid
;
2041 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2042 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
2043 !uid_eq(attr
->ia_uid
, inode
->i_uid
)) {
2044 req
->r_args
.setattr
.uid
= cpu_to_le32(
2045 from_kuid(&init_user_ns
, attr
->ia_uid
));
2046 mask
|= CEPH_SETATTR_UID
;
2047 release
|= CEPH_CAP_AUTH_SHARED
;
2050 if (ia_valid
& ATTR_GID
) {
2051 dout("setattr %p gid %d -> %d\n", inode
,
2052 from_kgid(&init_user_ns
, inode
->i_gid
),
2053 from_kgid(&init_user_ns
, attr
->ia_gid
));
2054 if (issued
& CEPH_CAP_AUTH_EXCL
) {
2055 inode
->i_gid
= attr
->ia_gid
;
2056 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2057 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
2058 !gid_eq(attr
->ia_gid
, inode
->i_gid
)) {
2059 req
->r_args
.setattr
.gid
= cpu_to_le32(
2060 from_kgid(&init_user_ns
, attr
->ia_gid
));
2061 mask
|= CEPH_SETATTR_GID
;
2062 release
|= CEPH_CAP_AUTH_SHARED
;
2065 if (ia_valid
& ATTR_MODE
) {
2066 dout("setattr %p mode 0%o -> 0%o\n", inode
, inode
->i_mode
,
2068 if (issued
& CEPH_CAP_AUTH_EXCL
) {
2069 inode
->i_mode
= attr
->ia_mode
;
2070 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2071 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
2072 attr
->ia_mode
!= inode
->i_mode
) {
2073 inode
->i_mode
= attr
->ia_mode
;
2074 req
->r_args
.setattr
.mode
= cpu_to_le32(attr
->ia_mode
);
2075 mask
|= CEPH_SETATTR_MODE
;
2076 release
|= CEPH_CAP_AUTH_SHARED
;
2080 if (ia_valid
& ATTR_ATIME
) {
2081 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode
,
2082 inode
->i_atime
.tv_sec
, inode
->i_atime
.tv_nsec
,
2083 attr
->ia_atime
.tv_sec
, attr
->ia_atime
.tv_nsec
);
2084 if (issued
& CEPH_CAP_FILE_EXCL
) {
2085 ci
->i_time_warp_seq
++;
2086 inode
->i_atime
= attr
->ia_atime
;
2087 dirtied
|= CEPH_CAP_FILE_EXCL
;
2088 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
2089 timespec64_compare(&inode
->i_atime
,
2090 &attr
->ia_atime
) < 0) {
2091 inode
->i_atime
= attr
->ia_atime
;
2092 dirtied
|= CEPH_CAP_FILE_WR
;
2093 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
2094 !timespec64_equal(&inode
->i_atime
, &attr
->ia_atime
)) {
2095 ceph_encode_timespec64(&req
->r_args
.setattr
.atime
,
2097 mask
|= CEPH_SETATTR_ATIME
;
2098 release
|= CEPH_CAP_FILE_SHARED
|
2099 CEPH_CAP_FILE_RD
| CEPH_CAP_FILE_WR
;
2102 if (ia_valid
& ATTR_SIZE
) {
2103 loff_t isize
= i_size_read(inode
);
2105 dout("setattr %p size %lld -> %lld\n", inode
, isize
, attr
->ia_size
);
2106 if ((issued
& CEPH_CAP_FILE_EXCL
) && attr
->ia_size
> isize
) {
2107 i_size_write(inode
, attr
->ia_size
);
2108 inode
->i_blocks
= calc_inode_blocks(attr
->ia_size
);
2109 ci
->i_reported_size
= attr
->ia_size
;
2110 dirtied
|= CEPH_CAP_FILE_EXCL
;
2111 ia_valid
|= ATTR_MTIME
;
2112 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
2113 attr
->ia_size
!= isize
) {
2114 req
->r_args
.setattr
.size
= cpu_to_le64(attr
->ia_size
);
2115 req
->r_args
.setattr
.old_size
= cpu_to_le64(isize
);
2116 mask
|= CEPH_SETATTR_SIZE
;
2117 release
|= CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_EXCL
|
2118 CEPH_CAP_FILE_RD
| CEPH_CAP_FILE_WR
;
2121 if (ia_valid
& ATTR_MTIME
) {
2122 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode
,
2123 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
2124 attr
->ia_mtime
.tv_sec
, attr
->ia_mtime
.tv_nsec
);
2125 if (issued
& CEPH_CAP_FILE_EXCL
) {
2126 ci
->i_time_warp_seq
++;
2127 inode
->i_mtime
= attr
->ia_mtime
;
2128 dirtied
|= CEPH_CAP_FILE_EXCL
;
2129 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
2130 timespec64_compare(&inode
->i_mtime
,
2131 &attr
->ia_mtime
) < 0) {
2132 inode
->i_mtime
= attr
->ia_mtime
;
2133 dirtied
|= CEPH_CAP_FILE_WR
;
2134 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
2135 !timespec64_equal(&inode
->i_mtime
, &attr
->ia_mtime
)) {
2136 ceph_encode_timespec64(&req
->r_args
.setattr
.mtime
,
2138 mask
|= CEPH_SETATTR_MTIME
;
2139 release
|= CEPH_CAP_FILE_SHARED
|
2140 CEPH_CAP_FILE_RD
| CEPH_CAP_FILE_WR
;
2144 /* these do nothing */
2145 if (ia_valid
& ATTR_CTIME
) {
2146 bool only
= (ia_valid
& (ATTR_SIZE
|ATTR_MTIME
|ATTR_ATIME
|
2147 ATTR_MODE
|ATTR_UID
|ATTR_GID
)) == 0;
2148 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode
,
2149 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
2150 attr
->ia_ctime
.tv_sec
, attr
->ia_ctime
.tv_nsec
,
2151 only
? "ctime only" : "ignored");
2154 * if kernel wants to dirty ctime but nothing else,
2155 * we need to choose a cap to dirty under, or do
2156 * a almost-no-op setattr
2158 if (issued
& CEPH_CAP_AUTH_EXCL
)
2159 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2160 else if (issued
& CEPH_CAP_FILE_EXCL
)
2161 dirtied
|= CEPH_CAP_FILE_EXCL
;
2162 else if (issued
& CEPH_CAP_XATTR_EXCL
)
2163 dirtied
|= CEPH_CAP_XATTR_EXCL
;
2165 mask
|= CEPH_SETATTR_CTIME
;
2168 if (ia_valid
& ATTR_FILE
)
2169 dout("setattr %p ATTR_FILE ... hrm!\n", inode
);
2172 inode_dirty_flags
= __ceph_mark_dirty_caps(ci
, dirtied
,
2174 inode
->i_ctime
= attr
->ia_ctime
;
2178 spin_unlock(&ci
->i_ceph_lock
);
2179 if (lock_snap_rwsem
)
2180 up_read(&mdsc
->snap_rwsem
);
2182 if (inode_dirty_flags
)
2183 __mark_inode_dirty(inode
, inode_dirty_flags
);
2187 req
->r_inode
= inode
;
2189 req
->r_inode_drop
= release
;
2190 req
->r_args
.setattr
.mask
= cpu_to_le32(mask
);
2191 req
->r_num_caps
= 1;
2192 req
->r_stamp
= attr
->ia_ctime
;
2193 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
2195 dout("setattr %p result=%d (%s locally, %d remote)\n", inode
, err
,
2196 ceph_cap_string(dirtied
), mask
);
2198 ceph_mdsc_put_request(req
);
2199 ceph_free_cap_flush(prealloc_cf
);
2201 if (err
>= 0 && (mask
& CEPH_SETATTR_SIZE
))
2202 __ceph_do_pending_vmtruncate(inode
);
2210 int ceph_setattr(struct user_namespace
*mnt_userns
, struct dentry
*dentry
,
2213 struct inode
*inode
= d_inode(dentry
);
2214 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
2217 if (ceph_snap(inode
) != CEPH_NOSNAP
)
2220 err
= setattr_prepare(&init_user_ns
, dentry
, attr
);
2224 if ((attr
->ia_valid
& ATTR_SIZE
) &&
2225 attr
->ia_size
> max(i_size_read(inode
), fsc
->max_file_size
))
2228 if ((attr
->ia_valid
& ATTR_SIZE
) &&
2229 ceph_quota_is_max_bytes_exceeded(inode
, attr
->ia_size
))
2232 err
= __ceph_setattr(inode
, attr
);
2234 if (err
>= 0 && (attr
->ia_valid
& ATTR_MODE
))
2235 err
= posix_acl_chmod(&init_user_ns
, inode
, attr
->ia_mode
);
2241 * Verify that we have a lease on the given mask. If not,
2242 * do a getattr against an mds.
2244 int __ceph_do_getattr(struct inode
*inode
, struct page
*locked_page
,
2245 int mask
, bool force
)
2247 struct ceph_fs_client
*fsc
= ceph_sb_to_client(inode
->i_sb
);
2248 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
2249 struct ceph_mds_request
*req
;
2253 if (ceph_snap(inode
) == CEPH_SNAPDIR
) {
2254 dout("do_getattr inode %p SNAPDIR\n", inode
);
2258 dout("do_getattr inode %p mask %s mode 0%o\n",
2259 inode
, ceph_cap_string(mask
), inode
->i_mode
);
2260 if (!force
&& ceph_caps_issued_mask_metric(ceph_inode(inode
), mask
, 1))
2263 mode
= (mask
& CEPH_STAT_RSTAT
) ? USE_AUTH_MDS
: USE_ANY_MDS
;
2264 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_GETATTR
, mode
);
2266 return PTR_ERR(req
);
2267 req
->r_inode
= inode
;
2269 req
->r_num_caps
= 1;
2270 req
->r_args
.getattr
.mask
= cpu_to_le32(mask
);
2271 req
->r_locked_page
= locked_page
;
2272 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
2273 if (locked_page
&& err
== 0) {
2274 u64 inline_version
= req
->r_reply_info
.targeti
.inline_version
;
2275 if (inline_version
== 0) {
2276 /* the reply is supposed to contain inline data */
2278 } else if (inline_version
== CEPH_INLINE_NONE
) {
2281 err
= req
->r_reply_info
.targeti
.inline_len
;
2284 ceph_mdsc_put_request(req
);
2285 dout("do_getattr result=%d\n", err
);
2291 * Check inode permissions. We verify we have a valid value for
2292 * the AUTH cap, then call the generic handler.
2294 int ceph_permission(struct user_namespace
*mnt_userns
, struct inode
*inode
,
2299 if (mask
& MAY_NOT_BLOCK
)
2302 err
= ceph_do_getattr(inode
, CEPH_CAP_AUTH_SHARED
, false);
2305 err
= generic_permission(&init_user_ns
, inode
, mask
);
2309 /* Craft a mask of needed caps given a set of requested statx attrs. */
2310 static int statx_to_caps(u32 want
, umode_t mode
)
2314 if (want
& (STATX_MODE
|STATX_UID
|STATX_GID
|STATX_CTIME
|STATX_BTIME
))
2315 mask
|= CEPH_CAP_AUTH_SHARED
;
2317 if (want
& (STATX_NLINK
|STATX_CTIME
)) {
2319 * The link count for directories depends on inode->i_subdirs,
2320 * and that is only updated when Fs caps are held.
2323 mask
|= CEPH_CAP_FILE_SHARED
;
2325 mask
|= CEPH_CAP_LINK_SHARED
;
2328 if (want
& (STATX_ATIME
|STATX_MTIME
|STATX_CTIME
|STATX_SIZE
|
2330 mask
|= CEPH_CAP_FILE_SHARED
;
2332 if (want
& (STATX_CTIME
))
2333 mask
|= CEPH_CAP_XATTR_SHARED
;
2339 * Get all the attributes. If we have sufficient caps for the requested attrs,
2340 * then we can avoid talking to the MDS at all.
2342 int ceph_getattr(struct user_namespace
*mnt_userns
, const struct path
*path
,
2343 struct kstat
*stat
, u32 request_mask
, unsigned int flags
)
2345 struct inode
*inode
= d_inode(path
->dentry
);
2346 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2347 u32 valid_mask
= STATX_BASIC_STATS
;
2350 /* Skip the getattr altogether if we're asked not to sync */
2351 if (!(flags
& AT_STATX_DONT_SYNC
)) {
2352 err
= ceph_do_getattr(inode
,
2353 statx_to_caps(request_mask
, inode
->i_mode
),
2354 flags
& AT_STATX_FORCE_SYNC
);
2359 generic_fillattr(&init_user_ns
, inode
, stat
);
2360 stat
->ino
= ceph_present_inode(inode
);
2363 * btime on newly-allocated inodes is 0, so if this is still set to
2364 * that, then assume that it's not valid.
2366 if (ci
->i_btime
.tv_sec
|| ci
->i_btime
.tv_nsec
) {
2367 stat
->btime
= ci
->i_btime
;
2368 valid_mask
|= STATX_BTIME
;
2371 if (ceph_snap(inode
) == CEPH_NOSNAP
)
2372 stat
->dev
= inode
->i_sb
->s_dev
;
2374 stat
->dev
= ci
->i_snapid_map
? ci
->i_snapid_map
->dev
: 0;
2376 if (S_ISDIR(inode
->i_mode
)) {
2377 if (ceph_test_mount_opt(ceph_sb_to_client(inode
->i_sb
),
2379 stat
->size
= ci
->i_rbytes
;
2381 stat
->size
= ci
->i_files
+ ci
->i_subdirs
;
2383 stat
->blksize
= 65536;
2385 * Some applications rely on the number of st_nlink
2386 * value on directories to be either 0 (if unlinked)
2387 * or 2 + number of subdirectories.
2389 if (stat
->nlink
== 1)
2390 /* '.' + '..' + subdirs */
2391 stat
->nlink
= 1 + 1 + ci
->i_subdirs
;
2394 stat
->result_mask
= request_mask
& valid_mask
;