1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
4 #include <linux/module.h>
6 #include <linux/slab.h>
7 #include <linux/string.h>
8 #include <linux/uaccess.h>
9 #include <linux/kernel.h>
10 #include <linux/writeback.h>
11 #include <linux/vmalloc.h>
12 #include <linux/xattr.h>
13 #include <linux/posix_acl.h>
14 #include <linux/random.h>
15 #include <linux/sort.h>
18 #include "mds_client.h"
20 #include <linux/ceph/decode.h>
23 * Ceph inode operations
25 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
26 * setattr, etc.), xattr helpers, and helpers for assimilating
27 * metadata returned by the MDS into our cache.
29 * Also define helpers for doing asynchronous writeback, invalidation,
30 * and truncation for the benefit of those who can't afford to block
31 * (typically because they are in the message handler path).
34 static const struct inode_operations ceph_symlink_iops
;
36 static void ceph_invalidate_work(struct work_struct
*work
);
37 static void ceph_writeback_work(struct work_struct
*work
);
38 static void ceph_vmtruncate_work(struct work_struct
*work
);
41 * find or create an inode, given the ceph ino number
43 static int ceph_set_ino_cb(struct inode
*inode
, void *data
)
45 ceph_inode(inode
)->i_vino
= *(struct ceph_vino
*)data
;
46 inode
->i_ino
= ceph_vino_to_ino(*(struct ceph_vino
*)data
);
50 struct inode
*ceph_get_inode(struct super_block
*sb
, struct ceph_vino vino
)
53 ino_t t
= ceph_vino_to_ino(vino
);
55 inode
= iget5_locked(sb
, t
, ceph_ino_compare
, ceph_set_ino_cb
, &vino
);
57 return ERR_PTR(-ENOMEM
);
58 if (inode
->i_state
& I_NEW
) {
59 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
60 inode
, ceph_vinop(inode
), (u64
)inode
->i_ino
);
61 unlock_new_inode(inode
);
64 dout("get_inode on %lu=%llx.%llx got %p\n", inode
->i_ino
, vino
.ino
,
70 * get/constuct snapdir inode for a given directory
72 struct inode
*ceph_get_snapdir(struct inode
*parent
)
74 struct ceph_vino vino
= {
75 .ino
= ceph_ino(parent
),
78 struct inode
*inode
= ceph_get_inode(parent
->i_sb
, vino
);
79 struct ceph_inode_info
*ci
= ceph_inode(inode
);
81 BUG_ON(!S_ISDIR(parent
->i_mode
));
84 inode
->i_mode
= parent
->i_mode
;
85 inode
->i_uid
= parent
->i_uid
;
86 inode
->i_gid
= parent
->i_gid
;
87 inode
->i_op
= &ceph_snapdir_iops
;
88 inode
->i_fop
= &ceph_snapdir_fops
;
89 ci
->i_snap_caps
= CEPH_CAP_PIN
; /* so we can open */
94 const struct inode_operations ceph_file_iops
= {
95 .permission
= ceph_permission
,
96 .setattr
= ceph_setattr
,
97 .getattr
= ceph_getattr
,
98 .listxattr
= ceph_listxattr
,
99 .get_acl
= ceph_get_acl
,
100 .set_acl
= ceph_set_acl
,
105 * We use a 'frag tree' to keep track of the MDS's directory fragments
106 * for a given inode (usually there is just a single fragment). We
107 * need to know when a child frag is delegated to a new MDS, or when
108 * it is flagged as replicated, so we can direct our requests
113 * find/create a frag in the tree
115 static struct ceph_inode_frag
*__get_or_create_frag(struct ceph_inode_info
*ci
,
119 struct rb_node
*parent
= NULL
;
120 struct ceph_inode_frag
*frag
;
123 p
= &ci
->i_fragtree
.rb_node
;
126 frag
= rb_entry(parent
, struct ceph_inode_frag
, node
);
127 c
= ceph_frag_compare(f
, frag
->frag
);
136 frag
= kmalloc(sizeof(*frag
), GFP_NOFS
);
138 return ERR_PTR(-ENOMEM
);
145 rb_link_node(&frag
->node
, parent
, p
);
146 rb_insert_color(&frag
->node
, &ci
->i_fragtree
);
148 dout("get_or_create_frag added %llx.%llx frag %x\n",
149 ceph_vinop(&ci
->vfs_inode
), f
);
154 * find a specific frag @f
156 struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
, u32 f
)
158 struct rb_node
*n
= ci
->i_fragtree
.rb_node
;
161 struct ceph_inode_frag
*frag
=
162 rb_entry(n
, struct ceph_inode_frag
, node
);
163 int c
= ceph_frag_compare(f
, frag
->frag
);
175 * Choose frag containing the given value @v. If @pfrag is
176 * specified, copy the frag delegation info to the caller if
179 static u32
__ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
180 struct ceph_inode_frag
*pfrag
, int *found
)
182 u32 t
= ceph_frag_make(0, 0);
183 struct ceph_inode_frag
*frag
;
191 WARN_ON(!ceph_frag_contains_value(t
, v
));
192 frag
= __ceph_find_frag(ci
, t
);
194 break; /* t is a leaf */
195 if (frag
->split_by
== 0) {
197 memcpy(pfrag
, frag
, sizeof(*pfrag
));
204 nway
= 1 << frag
->split_by
;
205 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v
, t
,
206 frag
->split_by
, nway
);
207 for (i
= 0; i
< nway
; i
++) {
208 n
= ceph_frag_make_child(t
, frag
->split_by
, i
);
209 if (ceph_frag_contains_value(n
, v
)) {
216 dout("choose_frag(%x) = %x\n", v
, t
);
221 u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
222 struct ceph_inode_frag
*pfrag
, int *found
)
225 mutex_lock(&ci
->i_fragtree_mutex
);
226 ret
= __ceph_choose_frag(ci
, v
, pfrag
, found
);
227 mutex_unlock(&ci
->i_fragtree_mutex
);
232 * Process dirfrag (delegation) info from the mds. Include leaf
233 * fragment in tree ONLY if ndist > 0. Otherwise, only
234 * branches/splits are included in i_fragtree)
236 static int ceph_fill_dirfrag(struct inode
*inode
,
237 struct ceph_mds_reply_dirfrag
*dirinfo
)
239 struct ceph_inode_info
*ci
= ceph_inode(inode
);
240 struct ceph_inode_frag
*frag
;
241 u32 id
= le32_to_cpu(dirinfo
->frag
);
242 int mds
= le32_to_cpu(dirinfo
->auth
);
243 int ndist
= le32_to_cpu(dirinfo
->ndist
);
248 spin_lock(&ci
->i_ceph_lock
);
250 diri_auth
= ci
->i_auth_cap
->mds
;
251 spin_unlock(&ci
->i_ceph_lock
);
253 if (mds
== -1) /* CDIR_AUTH_PARENT */
256 mutex_lock(&ci
->i_fragtree_mutex
);
257 if (ndist
== 0 && mds
== diri_auth
) {
258 /* no delegation info needed. */
259 frag
= __ceph_find_frag(ci
, id
);
262 if (frag
->split_by
== 0) {
263 /* tree leaf, remove */
264 dout("fill_dirfrag removed %llx.%llx frag %x"
265 " (no ref)\n", ceph_vinop(inode
), id
);
266 rb_erase(&frag
->node
, &ci
->i_fragtree
);
269 /* tree branch, keep and clear */
270 dout("fill_dirfrag cleared %llx.%llx frag %x"
271 " referral\n", ceph_vinop(inode
), id
);
279 /* find/add this frag to store mds delegation info */
280 frag
= __get_or_create_frag(ci
, id
);
282 /* this is not the end of the world; we can continue
283 with bad/inaccurate delegation info */
284 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
285 ceph_vinop(inode
), le32_to_cpu(dirinfo
->frag
));
291 frag
->ndist
= min_t(u32
, ndist
, CEPH_MAX_DIRFRAG_REP
);
292 for (i
= 0; i
< frag
->ndist
; i
++)
293 frag
->dist
[i
] = le32_to_cpu(dirinfo
->dist
[i
]);
294 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
295 ceph_vinop(inode
), frag
->frag
, frag
->ndist
);
298 mutex_unlock(&ci
->i_fragtree_mutex
);
302 static int frag_tree_split_cmp(const void *l
, const void *r
)
304 struct ceph_frag_tree_split
*ls
= (struct ceph_frag_tree_split
*)l
;
305 struct ceph_frag_tree_split
*rs
= (struct ceph_frag_tree_split
*)r
;
306 return ceph_frag_compare(le32_to_cpu(ls
->frag
),
307 le32_to_cpu(rs
->frag
));
310 static bool is_frag_child(u32 f
, struct ceph_inode_frag
*frag
)
313 return f
== ceph_frag_make(0, 0);
314 if (ceph_frag_bits(f
) != ceph_frag_bits(frag
->frag
) + frag
->split_by
)
316 return ceph_frag_contains_value(frag
->frag
, ceph_frag_value(f
));
319 static int ceph_fill_fragtree(struct inode
*inode
,
320 struct ceph_frag_tree_head
*fragtree
,
321 struct ceph_mds_reply_dirfrag
*dirinfo
)
323 struct ceph_inode_info
*ci
= ceph_inode(inode
);
324 struct ceph_inode_frag
*frag
, *prev_frag
= NULL
;
325 struct rb_node
*rb_node
;
326 unsigned i
, split_by
, nsplits
;
330 mutex_lock(&ci
->i_fragtree_mutex
);
331 nsplits
= le32_to_cpu(fragtree
->nsplits
);
332 if (nsplits
!= ci
->i_fragtree_nsplits
) {
334 } else if (nsplits
) {
335 i
= prandom_u32() % nsplits
;
336 id
= le32_to_cpu(fragtree
->splits
[i
].frag
);
337 if (!__ceph_find_frag(ci
, id
))
339 } else if (!RB_EMPTY_ROOT(&ci
->i_fragtree
)) {
340 rb_node
= rb_first(&ci
->i_fragtree
);
341 frag
= rb_entry(rb_node
, struct ceph_inode_frag
, node
);
342 if (frag
->frag
!= ceph_frag_make(0, 0) || rb_next(rb_node
))
345 if (!update
&& dirinfo
) {
346 id
= le32_to_cpu(dirinfo
->frag
);
347 if (id
!= __ceph_choose_frag(ci
, id
, NULL
, NULL
))
354 sort(fragtree
->splits
, nsplits
, sizeof(fragtree
->splits
[0]),
355 frag_tree_split_cmp
, NULL
);
358 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode
));
359 rb_node
= rb_first(&ci
->i_fragtree
);
360 for (i
= 0; i
< nsplits
; i
++) {
361 id
= le32_to_cpu(fragtree
->splits
[i
].frag
);
362 split_by
= le32_to_cpu(fragtree
->splits
[i
].by
);
363 if (split_by
== 0 || ceph_frag_bits(id
) + split_by
> 24) {
364 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
365 "frag %x split by %d\n", ceph_vinop(inode
),
366 i
, nsplits
, id
, split_by
);
371 frag
= rb_entry(rb_node
, struct ceph_inode_frag
, node
);
372 if (ceph_frag_compare(frag
->frag
, id
) >= 0) {
373 if (frag
->frag
!= id
)
376 rb_node
= rb_next(rb_node
);
379 rb_node
= rb_next(rb_node
);
380 /* delete stale split/leaf node */
381 if (frag
->split_by
> 0 ||
382 !is_frag_child(frag
->frag
, prev_frag
)) {
383 rb_erase(&frag
->node
, &ci
->i_fragtree
);
384 if (frag
->split_by
> 0)
385 ci
->i_fragtree_nsplits
--;
391 frag
= __get_or_create_frag(ci
, id
);
395 if (frag
->split_by
== 0)
396 ci
->i_fragtree_nsplits
++;
397 frag
->split_by
= split_by
;
398 dout(" frag %x split by %d\n", frag
->frag
, frag
->split_by
);
402 frag
= rb_entry(rb_node
, struct ceph_inode_frag
, node
);
403 rb_node
= rb_next(rb_node
);
404 /* delete stale split/leaf node */
405 if (frag
->split_by
> 0 ||
406 !is_frag_child(frag
->frag
, prev_frag
)) {
407 rb_erase(&frag
->node
, &ci
->i_fragtree
);
408 if (frag
->split_by
> 0)
409 ci
->i_fragtree_nsplits
--;
414 mutex_unlock(&ci
->i_fragtree_mutex
);
419 * initialize a newly allocated inode.
421 struct inode
*ceph_alloc_inode(struct super_block
*sb
)
423 struct ceph_inode_info
*ci
;
426 ci
= kmem_cache_alloc(ceph_inode_cachep
, GFP_NOFS
);
430 dout("alloc_inode %p\n", &ci
->vfs_inode
);
432 spin_lock_init(&ci
->i_ceph_lock
);
435 ci
->i_inline_version
= 0;
436 ci
->i_time_warp_seq
= 0;
437 ci
->i_ceph_flags
= 0;
438 atomic64_set(&ci
->i_ordered_count
, 1);
439 atomic64_set(&ci
->i_release_count
, 1);
440 atomic64_set(&ci
->i_complete_seq
[0], 0);
441 atomic64_set(&ci
->i_complete_seq
[1], 0);
442 ci
->i_symlink
= NULL
;
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
, 0);
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_wb_work
, ceph_writeback_work
);
513 INIT_WORK(&ci
->i_pg_inv_work
, ceph_invalidate_work
);
515 INIT_WORK(&ci
->i_vmtruncate_work
, ceph_vmtruncate_work
);
517 ceph_fscache_inode_init(ci
);
519 return &ci
->vfs_inode
;
522 static void ceph_i_callback(struct rcu_head
*head
)
524 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
525 struct ceph_inode_info
*ci
= ceph_inode(inode
);
527 kmem_cache_free(ceph_inode_cachep
, ci
);
530 void ceph_destroy_inode(struct inode
*inode
)
532 struct ceph_inode_info
*ci
= ceph_inode(inode
);
533 struct ceph_inode_frag
*frag
;
536 dout("destroy_inode %p ino %llx.%llx\n", inode
, ceph_vinop(inode
));
538 ceph_fscache_unregister_inode_cookie(ci
);
540 ceph_queue_caps_release(inode
);
542 if (__ceph_has_any_quota(ci
))
543 ceph_adjust_quota_realms_count(inode
, false);
546 * we may still have a snap_realm reference if there are stray
547 * caps in i_snap_caps.
549 if (ci
->i_snap_realm
) {
550 struct ceph_mds_client
*mdsc
=
551 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
552 struct ceph_snap_realm
*realm
= ci
->i_snap_realm
;
554 dout(" dropping residual ref to snap realm %p\n", realm
);
555 spin_lock(&realm
->inodes_with_caps_lock
);
556 list_del_init(&ci
->i_snap_realm_item
);
557 ci
->i_snap_realm
= NULL
;
558 if (realm
->ino
== ci
->i_vino
.ino
)
560 spin_unlock(&realm
->inodes_with_caps_lock
);
561 ceph_put_snap_realm(mdsc
, realm
);
564 kfree(ci
->i_symlink
);
565 while ((n
= rb_first(&ci
->i_fragtree
)) != NULL
) {
566 frag
= rb_entry(n
, struct ceph_inode_frag
, node
);
567 rb_erase(n
, &ci
->i_fragtree
);
570 ci
->i_fragtree_nsplits
= 0;
572 __ceph_destroy_xattrs(ci
);
573 if (ci
->i_xattrs
.blob
)
574 ceph_buffer_put(ci
->i_xattrs
.blob
);
575 if (ci
->i_xattrs
.prealloc_blob
)
576 ceph_buffer_put(ci
->i_xattrs
.prealloc_blob
);
578 ceph_put_string(rcu_dereference_raw(ci
->i_layout
.pool_ns
));
580 call_rcu(&inode
->i_rcu
, ceph_i_callback
);
583 int ceph_drop_inode(struct inode
*inode
)
586 * Positve dentry and corresponding inode are always accompanied
587 * in MDS reply. So no need to keep inode in the cache after
588 * dropping all its aliases.
593 static inline blkcnt_t
calc_inode_blocks(u64 size
)
595 return (size
+ (1<<9) - 1) >> 9;
599 * Helpers to fill in size, ctime, mtime, and atime. We have to be
600 * careful because either the client or MDS may have more up to date
601 * info, depending on which capabilities are held, and whether
602 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
603 * and size are monotonically increasing, except when utimes() or
604 * truncate() increments the corresponding _seq values.)
606 int ceph_fill_file_size(struct inode
*inode
, int issued
,
607 u32 truncate_seq
, u64 truncate_size
, u64 size
)
609 struct ceph_inode_info
*ci
= ceph_inode(inode
);
612 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) > 0 ||
613 (truncate_seq
== ci
->i_truncate_seq
&& size
> inode
->i_size
)) {
614 dout("size %lld -> %llu\n", inode
->i_size
, size
);
615 if (size
> 0 && S_ISDIR(inode
->i_mode
)) {
616 pr_err("fill_file_size non-zero size for directory\n");
619 i_size_write(inode
, size
);
620 inode
->i_blocks
= calc_inode_blocks(size
);
621 ci
->i_reported_size
= size
;
622 if (truncate_seq
!= ci
->i_truncate_seq
) {
623 dout("truncate_seq %u -> %u\n",
624 ci
->i_truncate_seq
, truncate_seq
);
625 ci
->i_truncate_seq
= truncate_seq
;
627 /* the MDS should have revoked these caps */
628 WARN_ON_ONCE(issued
& (CEPH_CAP_FILE_EXCL
|
631 CEPH_CAP_FILE_LAZYIO
));
633 * If we hold relevant caps, or in the case where we're
634 * not the only client referencing this file and we
635 * don't hold those caps, then we need to check whether
636 * the file is either opened or mmaped
638 if ((issued
& (CEPH_CAP_FILE_CACHE
|
639 CEPH_CAP_FILE_BUFFER
)) ||
640 mapping_mapped(inode
->i_mapping
) ||
641 __ceph_caps_file_wanted(ci
)) {
642 ci
->i_truncate_pending
++;
647 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) >= 0 &&
648 ci
->i_truncate_size
!= truncate_size
) {
649 dout("truncate_size %lld -> %llu\n", ci
->i_truncate_size
,
651 ci
->i_truncate_size
= truncate_size
;
655 ceph_fscache_invalidate(inode
);
660 void ceph_fill_file_time(struct inode
*inode
, int issued
,
661 u64 time_warp_seq
, struct timespec64
*ctime
,
662 struct timespec64
*mtime
, struct timespec64
*atime
)
664 struct ceph_inode_info
*ci
= ceph_inode(inode
);
667 if (issued
& (CEPH_CAP_FILE_EXCL
|
669 CEPH_CAP_FILE_BUFFER
|
671 CEPH_CAP_XATTR_EXCL
)) {
672 if (ci
->i_version
== 0 ||
673 timespec64_compare(ctime
, &inode
->i_ctime
) > 0) {
674 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
675 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
676 ctime
->tv_sec
, ctime
->tv_nsec
);
677 inode
->i_ctime
= *ctime
;
679 if (ci
->i_version
== 0 ||
680 ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) > 0) {
681 /* the MDS did a utimes() */
682 dout("mtime %lld.%09ld -> %lld.%09ld "
684 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
685 mtime
->tv_sec
, mtime
->tv_nsec
,
686 ci
->i_time_warp_seq
, (int)time_warp_seq
);
688 inode
->i_mtime
= *mtime
;
689 inode
->i_atime
= *atime
;
690 ci
->i_time_warp_seq
= time_warp_seq
;
691 } else if (time_warp_seq
== ci
->i_time_warp_seq
) {
692 /* nobody did utimes(); take the max */
693 if (timespec64_compare(mtime
, &inode
->i_mtime
) > 0) {
694 dout("mtime %lld.%09ld -> %lld.%09ld inc\n",
695 inode
->i_mtime
.tv_sec
,
696 inode
->i_mtime
.tv_nsec
,
697 mtime
->tv_sec
, mtime
->tv_nsec
);
698 inode
->i_mtime
= *mtime
;
700 if (timespec64_compare(atime
, &inode
->i_atime
) > 0) {
701 dout("atime %lld.%09ld -> %lld.%09ld inc\n",
702 inode
->i_atime
.tv_sec
,
703 inode
->i_atime
.tv_nsec
,
704 atime
->tv_sec
, atime
->tv_nsec
);
705 inode
->i_atime
= *atime
;
707 } else if (issued
& CEPH_CAP_FILE_EXCL
) {
708 /* we did a utimes(); ignore mds values */
713 /* we have no write|excl caps; whatever the MDS says is true */
714 if (ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) >= 0) {
715 inode
->i_ctime
= *ctime
;
716 inode
->i_mtime
= *mtime
;
717 inode
->i_atime
= *atime
;
718 ci
->i_time_warp_seq
= time_warp_seq
;
723 if (warn
) /* time_warp_seq shouldn't go backwards */
724 dout("%p mds time_warp_seq %llu < %u\n",
725 inode
, time_warp_seq
, ci
->i_time_warp_seq
);
729 * Populate an inode based on info from mds. May be called on new or
732 static int fill_inode(struct inode
*inode
, struct page
*locked_page
,
733 struct ceph_mds_reply_info_in
*iinfo
,
734 struct ceph_mds_reply_dirfrag
*dirinfo
,
735 struct ceph_mds_session
*session
,
736 unsigned long ttl_from
, int cap_fmode
,
737 struct ceph_cap_reservation
*caps_reservation
)
739 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
740 struct ceph_mds_reply_inode
*info
= iinfo
->in
;
741 struct ceph_inode_info
*ci
= ceph_inode(inode
);
742 int issued
, new_issued
, info_caps
;
743 struct timespec64 mtime
, atime
, ctime
;
744 struct ceph_buffer
*xattr_blob
= NULL
;
745 struct ceph_string
*pool_ns
= NULL
;
746 struct ceph_cap
*new_cap
= NULL
;
749 bool queue_trunc
= false;
750 bool new_version
= false;
751 bool fill_inline
= false;
753 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
754 inode
, ceph_vinop(inode
), le64_to_cpu(info
->version
),
757 info_caps
= le32_to_cpu(info
->cap
.caps
);
759 /* prealloc new cap struct */
760 if (info_caps
&& ceph_snap(inode
) == CEPH_NOSNAP
)
761 new_cap
= ceph_get_cap(mdsc
, caps_reservation
);
764 * prealloc xattr data, if it looks like we'll need it. only
765 * if len > 4 (meaning there are actually xattrs; the first 4
766 * bytes are the xattr count).
768 if (iinfo
->xattr_len
> 4) {
769 xattr_blob
= ceph_buffer_new(iinfo
->xattr_len
, GFP_NOFS
);
771 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
775 if (iinfo
->pool_ns_len
> 0)
776 pool_ns
= ceph_find_or_create_string(iinfo
->pool_ns_data
,
779 spin_lock(&ci
->i_ceph_lock
);
782 * provided version will be odd if inode value is projected,
783 * even if stable. skip the update if we have newer stable
784 * info (ours>=theirs, e.g. due to racing mds replies), unless
785 * we are getting projected (unstable) info (in which case the
786 * version is odd, and we want ours>theirs).
792 if (ci
->i_version
== 0 ||
793 ((info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
) &&
794 le64_to_cpu(info
->version
) > (ci
->i_version
& ~1)))
797 __ceph_caps_issued(ci
, &issued
);
798 issued
|= __ceph_caps_dirty(ci
);
799 new_issued
= ~issued
& info_caps
;
802 inode
->i_rdev
= le32_to_cpu(info
->rdev
);
803 inode
->i_blkbits
= fls(le32_to_cpu(info
->layout
.fl_stripe_unit
)) - 1;
805 __ceph_update_quota(ci
, iinfo
->max_bytes
, iinfo
->max_files
);
807 if ((new_version
|| (new_issued
& CEPH_CAP_AUTH_SHARED
)) &&
808 (issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
809 inode
->i_mode
= le32_to_cpu(info
->mode
);
810 inode
->i_uid
= make_kuid(&init_user_ns
, le32_to_cpu(info
->uid
));
811 inode
->i_gid
= make_kgid(&init_user_ns
, le32_to_cpu(info
->gid
));
812 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
813 from_kuid(&init_user_ns
, inode
->i_uid
),
814 from_kgid(&init_user_ns
, inode
->i_gid
));
817 if ((new_version
|| (new_issued
& CEPH_CAP_LINK_SHARED
)) &&
818 (issued
& CEPH_CAP_LINK_EXCL
) == 0)
819 set_nlink(inode
, le32_to_cpu(info
->nlink
));
821 if (new_version
|| (new_issued
& CEPH_CAP_ANY_RD
)) {
822 /* be careful with mtime, atime, size */
823 ceph_decode_timespec64(&atime
, &info
->atime
);
824 ceph_decode_timespec64(&mtime
, &info
->mtime
);
825 ceph_decode_timespec64(&ctime
, &info
->ctime
);
826 ceph_fill_file_time(inode
, issued
,
827 le32_to_cpu(info
->time_warp_seq
),
828 &ctime
, &mtime
, &atime
);
831 if (new_version
|| (info_caps
& CEPH_CAP_FILE_SHARED
)) {
832 ci
->i_files
= le64_to_cpu(info
->files
);
833 ci
->i_subdirs
= le64_to_cpu(info
->subdirs
);
837 (new_issued
& (CEPH_CAP_ANY_FILE_RD
| CEPH_CAP_ANY_FILE_WR
))) {
838 s64 old_pool
= ci
->i_layout
.pool_id
;
839 struct ceph_string
*old_ns
;
841 ceph_file_layout_from_legacy(&ci
->i_layout
, &info
->layout
);
842 old_ns
= rcu_dereference_protected(ci
->i_layout
.pool_ns
,
843 lockdep_is_held(&ci
->i_ceph_lock
));
844 rcu_assign_pointer(ci
->i_layout
.pool_ns
, pool_ns
);
846 if (ci
->i_layout
.pool_id
!= old_pool
|| pool_ns
!= old_ns
)
847 ci
->i_ceph_flags
&= ~CEPH_I_POOL_PERM
;
851 queue_trunc
= ceph_fill_file_size(inode
, issued
,
852 le32_to_cpu(info
->truncate_seq
),
853 le64_to_cpu(info
->truncate_size
),
854 le64_to_cpu(info
->size
));
855 /* only update max_size on auth cap */
856 if ((info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
) &&
857 ci
->i_max_size
!= le64_to_cpu(info
->max_size
)) {
858 dout("max_size %lld -> %llu\n", ci
->i_max_size
,
859 le64_to_cpu(info
->max_size
));
860 ci
->i_max_size
= le64_to_cpu(info
->max_size
);
864 /* layout and rstat are not tracked by capability, update them if
865 * the inode info is from auth mds */
866 if (new_version
|| (info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
)) {
867 if (S_ISDIR(inode
->i_mode
)) {
868 ci
->i_dir_layout
= iinfo
->dir_layout
;
869 ci
->i_rbytes
= le64_to_cpu(info
->rbytes
);
870 ci
->i_rfiles
= le64_to_cpu(info
->rfiles
);
871 ci
->i_rsubdirs
= le64_to_cpu(info
->rsubdirs
);
872 ceph_decode_timespec64(&ci
->i_rctime
, &info
->rctime
);
877 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
878 if ((ci
->i_xattrs
.version
== 0 || !(issued
& CEPH_CAP_XATTR_EXCL
)) &&
879 le64_to_cpu(info
->xattr_version
) > ci
->i_xattrs
.version
) {
880 if (ci
->i_xattrs
.blob
)
881 ceph_buffer_put(ci
->i_xattrs
.blob
);
882 ci
->i_xattrs
.blob
= xattr_blob
;
884 memcpy(ci
->i_xattrs
.blob
->vec
.iov_base
,
885 iinfo
->xattr_data
, iinfo
->xattr_len
);
886 ci
->i_xattrs
.version
= le64_to_cpu(info
->xattr_version
);
887 ceph_forget_all_cached_acls(inode
);
891 /* finally update i_version */
892 if (le64_to_cpu(info
->version
) > ci
->i_version
)
893 ci
->i_version
= le64_to_cpu(info
->version
);
895 inode
->i_mapping
->a_ops
= &ceph_aops
;
897 switch (inode
->i_mode
& S_IFMT
) {
902 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
903 inode
->i_op
= &ceph_file_iops
;
906 inode
->i_op
= &ceph_file_iops
;
907 inode
->i_fop
= &ceph_file_fops
;
910 inode
->i_op
= &ceph_symlink_iops
;
911 if (!ci
->i_symlink
) {
912 u32 symlen
= iinfo
->symlink_len
;
915 spin_unlock(&ci
->i_ceph_lock
);
917 if (symlen
!= i_size_read(inode
)) {
918 pr_err("fill_inode %llx.%llx BAD symlink "
919 "size %lld\n", ceph_vinop(inode
),
921 i_size_write(inode
, symlen
);
922 inode
->i_blocks
= calc_inode_blocks(symlen
);
926 sym
= kstrndup(iinfo
->symlink
, symlen
, GFP_NOFS
);
930 spin_lock(&ci
->i_ceph_lock
);
934 kfree(sym
); /* lost a race */
936 inode
->i_link
= ci
->i_symlink
;
939 inode
->i_op
= &ceph_dir_iops
;
940 inode
->i_fop
= &ceph_dir_fops
;
943 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
944 ceph_vinop(inode
), inode
->i_mode
);
947 /* were we issued a capability? */
949 if (ceph_snap(inode
) == CEPH_NOSNAP
) {
950 ceph_add_cap(inode
, session
,
951 le64_to_cpu(info
->cap
.cap_id
),
952 cap_fmode
, info_caps
,
953 le32_to_cpu(info
->cap
.wanted
),
954 le32_to_cpu(info
->cap
.seq
),
955 le32_to_cpu(info
->cap
.mseq
),
956 le64_to_cpu(info
->cap
.realm
),
957 info
->cap
.flags
, &new_cap
);
959 /* set dir completion flag? */
960 if (S_ISDIR(inode
->i_mode
) &&
961 ci
->i_files
== 0 && ci
->i_subdirs
== 0 &&
962 (info_caps
& CEPH_CAP_FILE_SHARED
) &&
963 (issued
& CEPH_CAP_FILE_EXCL
) == 0 &&
964 !__ceph_dir_is_complete(ci
)) {
965 dout(" marking %p complete (empty)\n", inode
);
966 i_size_write(inode
, 0);
967 __ceph_dir_set_complete(ci
,
968 atomic64_read(&ci
->i_release_count
),
969 atomic64_read(&ci
->i_ordered_count
));
974 dout(" %p got snap_caps %s\n", inode
,
975 ceph_cap_string(info_caps
));
976 ci
->i_snap_caps
|= info_caps
;
978 __ceph_get_fmode(ci
, cap_fmode
);
980 } else if (cap_fmode
>= 0) {
981 pr_warn("mds issued no caps on %llx.%llx\n",
983 __ceph_get_fmode(ci
, cap_fmode
);
986 if (iinfo
->inline_version
> 0 &&
987 iinfo
->inline_version
>= ci
->i_inline_version
) {
988 int cache_caps
= CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_LAZYIO
;
989 ci
->i_inline_version
= iinfo
->inline_version
;
990 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
991 (locked_page
|| (info_caps
& cache_caps
)))
995 spin_unlock(&ci
->i_ceph_lock
);
998 ceph_fill_inline_data(inode
, locked_page
,
999 iinfo
->inline_data
, iinfo
->inline_len
);
1002 wake_up_all(&ci
->i_cap_wq
);
1004 /* queue truncate if we saw i_size decrease */
1006 ceph_queue_vmtruncate(inode
);
1008 /* populate frag tree */
1009 if (S_ISDIR(inode
->i_mode
))
1010 ceph_fill_fragtree(inode
, &info
->fragtree
, dirinfo
);
1012 /* update delegation info? */
1014 ceph_fill_dirfrag(inode
, dirinfo
);
1019 ceph_put_cap(mdsc
, new_cap
);
1021 ceph_buffer_put(xattr_blob
);
1022 ceph_put_string(pool_ns
);
1027 * caller should hold session s_mutex.
1029 static void update_dentry_lease(struct dentry
*dentry
,
1030 struct ceph_mds_reply_lease
*lease
,
1031 struct ceph_mds_session
*session
,
1032 unsigned long from_time
,
1033 struct ceph_vino
*tgt_vino
,
1034 struct ceph_vino
*dir_vino
)
1036 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
1037 long unsigned duration
= le32_to_cpu(lease
->duration_ms
);
1038 long unsigned ttl
= from_time
+ (duration
* HZ
) / 1000;
1039 long unsigned half_ttl
= from_time
+ (duration
* HZ
/ 2) / 1000;
1041 struct ceph_mds_session
*old_lease_session
= NULL
;
1044 * Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that
1045 * we expect a negative dentry.
1047 if (!tgt_vino
&& d_really_is_positive(dentry
))
1050 if (tgt_vino
&& (d_really_is_negative(dentry
) ||
1051 !ceph_ino_compare(d_inode(dentry
), tgt_vino
)))
1054 spin_lock(&dentry
->d_lock
);
1055 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
1056 dentry
, duration
, ttl
);
1058 dir
= d_inode(dentry
->d_parent
);
1060 /* make sure parent matches dir_vino */
1061 if (!ceph_ino_compare(dir
, dir_vino
))
1064 /* only track leases on regular dentries */
1065 if (ceph_snap(dir
) != CEPH_NOSNAP
)
1068 di
->lease_shared_gen
= atomic_read(&ceph_inode(dir
)->i_shared_gen
);
1073 if (di
->lease_gen
== session
->s_cap_gen
&&
1074 time_before(ttl
, di
->time
))
1075 goto out_unlock
; /* we already have a newer lease. */
1077 if (di
->lease_session
&& di
->lease_session
!= session
) {
1078 old_lease_session
= di
->lease_session
;
1079 di
->lease_session
= NULL
;
1082 ceph_dentry_lru_touch(dentry
);
1084 if (!di
->lease_session
)
1085 di
->lease_session
= ceph_get_mds_session(session
);
1086 di
->lease_gen
= session
->s_cap_gen
;
1087 di
->lease_seq
= le32_to_cpu(lease
->seq
);
1088 di
->lease_renew_after
= half_ttl
;
1089 di
->lease_renew_from
= 0;
1092 spin_unlock(&dentry
->d_lock
);
1093 if (old_lease_session
)
1094 ceph_put_mds_session(old_lease_session
);
1098 * splice a dentry to an inode.
1099 * caller must hold directory i_mutex for this to be safe.
1101 static struct dentry
*splice_dentry(struct dentry
*dn
, struct inode
*in
)
1103 struct dentry
*realdn
;
1105 BUG_ON(d_inode(dn
));
1107 if (S_ISDIR(in
->i_mode
)) {
1108 /* If inode is directory, d_splice_alias() below will remove
1109 * 'realdn' from its origin parent. We need to ensure that
1110 * origin parent's readdir cache will not reference 'realdn'
1112 realdn
= d_find_any_alias(in
);
1114 struct ceph_dentry_info
*di
= ceph_dentry(realdn
);
1115 spin_lock(&realdn
->d_lock
);
1117 realdn
->d_op
->d_prune(realdn
);
1120 di
->lease_shared_gen
= 0;
1123 spin_unlock(&realdn
->d_lock
);
1128 /* dn must be unhashed */
1129 if (!d_unhashed(dn
))
1131 realdn
= d_splice_alias(in
, dn
);
1132 if (IS_ERR(realdn
)) {
1133 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
1134 PTR_ERR(realdn
), dn
, in
, ceph_vinop(in
));
1136 dn
= realdn
; /* note realdn contains the error */
1138 } else if (realdn
) {
1139 dout("dn %p (%d) spliced with %p (%d) "
1140 "inode %p ino %llx.%llx\n",
1142 realdn
, d_count(realdn
),
1143 d_inode(realdn
), ceph_vinop(d_inode(realdn
)));
1147 BUG_ON(!ceph_dentry(dn
));
1148 dout("dn %p attached to %p ino %llx.%llx\n",
1149 dn
, d_inode(dn
), ceph_vinop(d_inode(dn
)));
1156 * Incorporate results into the local cache. This is either just
1157 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1160 * A reply may contain
1161 * a directory inode along with a dentry.
1162 * and/or a target inode
1164 * Called with snap_rwsem (read).
1166 int ceph_fill_trace(struct super_block
*sb
, struct ceph_mds_request
*req
)
1168 struct ceph_mds_session
*session
= req
->r_session
;
1169 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1170 struct inode
*in
= NULL
;
1171 struct ceph_vino tvino
, dvino
;
1172 struct ceph_fs_client
*fsc
= ceph_sb_to_client(sb
);
1175 dout("fill_trace %p is_dentry %d is_target %d\n", req
,
1176 rinfo
->head
->is_dentry
, rinfo
->head
->is_target
);
1178 if (!rinfo
->head
->is_target
&& !rinfo
->head
->is_dentry
) {
1179 dout("fill_trace reply is empty!\n");
1180 if (rinfo
->head
->result
== 0 && req
->r_parent
)
1181 ceph_invalidate_dir_request(req
);
1185 if (rinfo
->head
->is_dentry
) {
1186 struct inode
*dir
= req
->r_parent
;
1189 err
= fill_inode(dir
, NULL
,
1190 &rinfo
->diri
, rinfo
->dirfrag
,
1191 session
, req
->r_request_started
, -1,
1192 &req
->r_caps_reservation
);
1199 if (dir
&& req
->r_op
== CEPH_MDS_OP_LOOKUPNAME
) {
1201 struct dentry
*dn
, *parent
;
1203 BUG_ON(!rinfo
->head
->is_target
);
1204 BUG_ON(req
->r_dentry
);
1206 parent
= d_find_any_alias(dir
);
1209 dname
.name
= rinfo
->dname
;
1210 dname
.len
= rinfo
->dname_len
;
1211 dname
.hash
= full_name_hash(parent
, dname
.name
, dname
.len
);
1212 tvino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1213 tvino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1215 dn
= d_lookup(parent
, &dname
);
1216 dout("d_lookup on parent=%p name=%.*s got %p\n",
1217 parent
, dname
.len
, dname
.name
, dn
);
1220 dn
= d_alloc(parent
, &dname
);
1221 dout("d_alloc %p '%.*s' = %p\n", parent
,
1222 dname
.len
, dname
.name
, dn
);
1229 } else if (d_really_is_positive(dn
) &&
1230 (ceph_ino(d_inode(dn
)) != tvino
.ino
||
1231 ceph_snap(d_inode(dn
)) != tvino
.snap
)) {
1232 dout(" dn %p points to wrong inode %p\n",
1234 ceph_dir_clear_ordered(dir
);
1245 if (rinfo
->head
->is_target
) {
1246 tvino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1247 tvino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1249 in
= ceph_get_inode(sb
, tvino
);
1254 req
->r_target_inode
= in
;
1256 err
= fill_inode(in
, req
->r_locked_page
, &rinfo
->targeti
, NULL
,
1257 session
, req
->r_request_started
,
1258 (!test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
) &&
1259 rinfo
->head
->result
== 0) ? req
->r_fmode
: -1,
1260 &req
->r_caps_reservation
);
1262 pr_err("fill_inode badness %p %llx.%llx\n",
1263 in
, ceph_vinop(in
));
1269 * ignore null lease/binding on snapdir ENOENT, or else we
1270 * will have trouble splicing in the virtual snapdir later
1272 if (rinfo
->head
->is_dentry
&&
1273 !test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
) &&
1274 test_bit(CEPH_MDS_R_PARENT_LOCKED
, &req
->r_req_flags
) &&
1275 (rinfo
->head
->is_target
|| strncmp(req
->r_dentry
->d_name
.name
,
1276 fsc
->mount_options
->snapdir_name
,
1277 req
->r_dentry
->d_name
.len
))) {
1279 * lookup link rename : null -> possibly existing inode
1280 * mknod symlink mkdir : null -> new inode
1281 * unlink : linked -> null
1283 struct inode
*dir
= req
->r_parent
;
1284 struct dentry
*dn
= req
->r_dentry
;
1285 bool have_dir_cap
, have_lease
;
1289 BUG_ON(d_inode(dn
->d_parent
) != dir
);
1291 dvino
.ino
= le64_to_cpu(rinfo
->diri
.in
->ino
);
1292 dvino
.snap
= le64_to_cpu(rinfo
->diri
.in
->snapid
);
1294 BUG_ON(ceph_ino(dir
) != dvino
.ino
);
1295 BUG_ON(ceph_snap(dir
) != dvino
.snap
);
1297 /* do we have a lease on the whole dir? */
1299 (le32_to_cpu(rinfo
->diri
.in
->cap
.caps
) &
1300 CEPH_CAP_FILE_SHARED
);
1302 /* do we have a dn lease? */
1303 have_lease
= have_dir_cap
||
1304 le32_to_cpu(rinfo
->dlease
->duration_ms
);
1306 dout("fill_trace no dentry lease or dir cap\n");
1309 if (req
->r_old_dentry
&& req
->r_op
== CEPH_MDS_OP_RENAME
) {
1310 struct inode
*olddir
= req
->r_old_dentry_dir
;
1313 dout(" src %p '%pd' dst %p '%pd'\n",
1317 dout("fill_trace doing d_move %p -> %p\n",
1318 req
->r_old_dentry
, dn
);
1320 /* d_move screws up sibling dentries' offsets */
1321 ceph_dir_clear_ordered(dir
);
1322 ceph_dir_clear_ordered(olddir
);
1324 d_move(req
->r_old_dentry
, dn
);
1325 dout(" src %p '%pd' dst %p '%pd'\n",
1330 /* ensure target dentry is invalidated, despite
1331 rehashing bug in vfs_rename_dir */
1332 ceph_invalidate_dentry_lease(dn
);
1334 dout("dn %p gets new offset %lld\n", req
->r_old_dentry
,
1335 ceph_dentry(req
->r_old_dentry
)->offset
);
1337 dn
= req
->r_old_dentry
; /* use old_dentry */
1341 if (!rinfo
->head
->is_target
) {
1342 dout("fill_trace null dentry\n");
1343 if (d_really_is_positive(dn
)) {
1344 dout("d_delete %p\n", dn
);
1345 ceph_dir_clear_ordered(dir
);
1347 } else if (have_lease
) {
1350 update_dentry_lease(dn
, rinfo
->dlease
,
1352 req
->r_request_started
,
1358 /* attach proper inode */
1359 if (d_really_is_negative(dn
)) {
1360 ceph_dir_clear_ordered(dir
);
1362 dn
= splice_dentry(dn
, in
);
1367 req
->r_dentry
= dn
; /* may have spliced */
1368 } else if (d_really_is_positive(dn
) && d_inode(dn
) != in
) {
1369 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1370 dn
, d_inode(dn
), ceph_vinop(d_inode(dn
)),
1377 tvino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1378 tvino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1379 update_dentry_lease(dn
, rinfo
->dlease
, session
,
1380 req
->r_request_started
,
1383 dout(" final dn %p\n", dn
);
1384 } else if ((req
->r_op
== CEPH_MDS_OP_LOOKUPSNAP
||
1385 req
->r_op
== CEPH_MDS_OP_MKSNAP
) &&
1386 !test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
)) {
1387 struct dentry
*dn
= req
->r_dentry
;
1388 struct inode
*dir
= req
->r_parent
;
1390 /* fill out a snapdir LOOKUPSNAP dentry */
1393 BUG_ON(ceph_snap(dir
) != CEPH_SNAPDIR
);
1394 dout(" linking snapped dir %p to dn %p\n", in
, dn
);
1395 ceph_dir_clear_ordered(dir
);
1397 dn
= splice_dentry(dn
, in
);
1402 req
->r_dentry
= dn
; /* may have spliced */
1403 } else if (rinfo
->head
->is_dentry
) {
1404 struct ceph_vino
*ptvino
= NULL
;
1406 if ((le32_to_cpu(rinfo
->diri
.in
->cap
.caps
) & CEPH_CAP_FILE_SHARED
) ||
1407 le32_to_cpu(rinfo
->dlease
->duration_ms
)) {
1408 dvino
.ino
= le64_to_cpu(rinfo
->diri
.in
->ino
);
1409 dvino
.snap
= le64_to_cpu(rinfo
->diri
.in
->snapid
);
1411 if (rinfo
->head
->is_target
) {
1412 tvino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1413 tvino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1417 update_dentry_lease(req
->r_dentry
, rinfo
->dlease
,
1418 session
, req
->r_request_started
, ptvino
,
1421 dout("%s: no dentry lease or dir cap\n", __func__
);
1425 dout("fill_trace done err=%d\n", err
);
1430 * Prepopulate our cache with readdir results, leases, etc.
1432 static int readdir_prepopulate_inodes_only(struct ceph_mds_request
*req
,
1433 struct ceph_mds_session
*session
)
1435 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1438 for (i
= 0; i
< rinfo
->dir_nr
; i
++) {
1439 struct ceph_mds_reply_dir_entry
*rde
= rinfo
->dir_entries
+ i
;
1440 struct ceph_vino vino
;
1444 vino
.ino
= le64_to_cpu(rde
->inode
.in
->ino
);
1445 vino
.snap
= le64_to_cpu(rde
->inode
.in
->snapid
);
1447 in
= ceph_get_inode(req
->r_dentry
->d_sb
, vino
);
1450 dout("new_inode badness got %d\n", err
);
1453 rc
= fill_inode(in
, NULL
, &rde
->inode
, NULL
, session
,
1454 req
->r_request_started
, -1,
1455 &req
->r_caps_reservation
);
1457 pr_err("fill_inode badness on %p got %d\n", in
, rc
);
1466 void ceph_readdir_cache_release(struct ceph_readdir_cache_control
*ctl
)
1470 put_page(ctl
->page
);
1475 static int fill_readdir_cache(struct inode
*dir
, struct dentry
*dn
,
1476 struct ceph_readdir_cache_control
*ctl
,
1477 struct ceph_mds_request
*req
)
1479 struct ceph_inode_info
*ci
= ceph_inode(dir
);
1480 unsigned nsize
= PAGE_SIZE
/ sizeof(struct dentry
*);
1481 unsigned idx
= ctl
->index
% nsize
;
1482 pgoff_t pgoff
= ctl
->index
/ nsize
;
1484 if (!ctl
->page
|| pgoff
!= page_index(ctl
->page
)) {
1485 ceph_readdir_cache_release(ctl
);
1487 ctl
->page
= grab_cache_page(&dir
->i_data
, pgoff
);
1489 ctl
->page
= find_lock_page(&dir
->i_data
, pgoff
);
1492 return idx
== 0 ? -ENOMEM
: 0;
1494 /* reading/filling the cache are serialized by
1495 * i_mutex, no need to use page lock */
1496 unlock_page(ctl
->page
);
1497 ctl
->dentries
= kmap(ctl
->page
);
1499 memset(ctl
->dentries
, 0, PAGE_SIZE
);
1502 if (req
->r_dir_release_cnt
== atomic64_read(&ci
->i_release_count
) &&
1503 req
->r_dir_ordered_cnt
== atomic64_read(&ci
->i_ordered_count
)) {
1504 dout("readdir cache dn %p idx %d\n", dn
, ctl
->index
);
1505 ctl
->dentries
[idx
] = dn
;
1508 dout("disable readdir cache\n");
1514 int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
1515 struct ceph_mds_session
*session
)
1517 struct dentry
*parent
= req
->r_dentry
;
1518 struct ceph_inode_info
*ci
= ceph_inode(d_inode(parent
));
1519 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1523 int err
= 0, skipped
= 0, ret
, i
;
1524 struct ceph_mds_request_head
*rhead
= req
->r_request
->front
.iov_base
;
1525 u32 frag
= le32_to_cpu(rhead
->args
.readdir
.frag
);
1528 struct ceph_readdir_cache_control cache_ctl
= {};
1530 if (test_bit(CEPH_MDS_R_ABORTED
, &req
->r_req_flags
))
1531 return readdir_prepopulate_inodes_only(req
, session
);
1533 if (rinfo
->hash_order
) {
1535 last_hash
= ceph_str_hash(ci
->i_dir_layout
.dl_dir_hash
,
1537 strlen(req
->r_path2
));
1538 last_hash
= ceph_frag_value(last_hash
);
1539 } else if (rinfo
->offset_hash
) {
1540 /* mds understands offset_hash */
1541 WARN_ON_ONCE(req
->r_readdir_offset
!= 2);
1542 last_hash
= le32_to_cpu(rhead
->args
.readdir
.offset_hash
);
1546 if (rinfo
->dir_dir
&&
1547 le32_to_cpu(rinfo
->dir_dir
->frag
) != frag
) {
1548 dout("readdir_prepopulate got new frag %x -> %x\n",
1549 frag
, le32_to_cpu(rinfo
->dir_dir
->frag
));
1550 frag
= le32_to_cpu(rinfo
->dir_dir
->frag
);
1551 if (!rinfo
->hash_order
)
1552 req
->r_readdir_offset
= 2;
1555 if (le32_to_cpu(rinfo
->head
->op
) == CEPH_MDS_OP_LSSNAP
) {
1556 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1557 rinfo
->dir_nr
, parent
);
1559 dout("readdir_prepopulate %d items under dn %p\n",
1560 rinfo
->dir_nr
, parent
);
1562 ceph_fill_dirfrag(d_inode(parent
), rinfo
->dir_dir
);
1564 if (ceph_frag_is_leftmost(frag
) &&
1565 req
->r_readdir_offset
== 2 &&
1566 !(rinfo
->hash_order
&& last_hash
)) {
1567 /* note dir version at start of readdir so we can
1568 * tell if any dentries get dropped */
1569 req
->r_dir_release_cnt
=
1570 atomic64_read(&ci
->i_release_count
);
1571 req
->r_dir_ordered_cnt
=
1572 atomic64_read(&ci
->i_ordered_count
);
1573 req
->r_readdir_cache_idx
= 0;
1577 cache_ctl
.index
= req
->r_readdir_cache_idx
;
1578 fpos_offset
= req
->r_readdir_offset
;
1580 /* FIXME: release caps/leases if error occurs */
1581 for (i
= 0; i
< rinfo
->dir_nr
; i
++) {
1582 struct ceph_mds_reply_dir_entry
*rde
= rinfo
->dir_entries
+ i
;
1583 struct ceph_vino tvino
, dvino
;
1585 dname
.name
= rde
->name
;
1586 dname
.len
= rde
->name_len
;
1587 dname
.hash
= full_name_hash(parent
, dname
.name
, dname
.len
);
1589 tvino
.ino
= le64_to_cpu(rde
->inode
.in
->ino
);
1590 tvino
.snap
= le64_to_cpu(rde
->inode
.in
->snapid
);
1592 if (rinfo
->hash_order
) {
1593 u32 hash
= ceph_str_hash(ci
->i_dir_layout
.dl_dir_hash
,
1594 rde
->name
, rde
->name_len
);
1595 hash
= ceph_frag_value(hash
);
1596 if (hash
!= last_hash
)
1599 rde
->offset
= ceph_make_fpos(hash
, fpos_offset
++, true);
1601 rde
->offset
= ceph_make_fpos(frag
, fpos_offset
++, false);
1605 dn
= d_lookup(parent
, &dname
);
1606 dout("d_lookup on parent=%p name=%.*s got %p\n",
1607 parent
, dname
.len
, dname
.name
, dn
);
1610 dn
= d_alloc(parent
, &dname
);
1611 dout("d_alloc %p '%.*s' = %p\n", parent
,
1612 dname
.len
, dname
.name
, dn
);
1614 dout("d_alloc badness\n");
1618 } else if (d_really_is_positive(dn
) &&
1619 (ceph_ino(d_inode(dn
)) != tvino
.ino
||
1620 ceph_snap(d_inode(dn
)) != tvino
.snap
)) {
1621 struct ceph_dentry_info
*di
= ceph_dentry(dn
);
1622 dout(" dn %p points to wrong inode %p\n",
1625 spin_lock(&dn
->d_lock
);
1626 if (di
->offset
> 0 &&
1627 di
->lease_shared_gen
==
1628 atomic_read(&ci
->i_shared_gen
)) {
1629 __ceph_dir_clear_ordered(ci
);
1632 spin_unlock(&dn
->d_lock
);
1640 if (d_really_is_positive(dn
)) {
1643 in
= ceph_get_inode(parent
->d_sb
, tvino
);
1645 dout("new_inode badness\n");
1653 ret
= fill_inode(in
, NULL
, &rde
->inode
, NULL
, session
,
1654 req
->r_request_started
, -1,
1655 &req
->r_caps_reservation
);
1657 pr_err("fill_inode badness on %p\n", in
);
1658 if (d_really_is_negative(dn
))
1665 if (d_really_is_negative(dn
)) {
1666 struct dentry
*realdn
;
1668 if (ceph_security_xattr_deadlock(in
)) {
1669 dout(" skip splicing dn %p to inode %p"
1670 " (security xattr deadlock)\n", dn
, in
);
1676 realdn
= splice_dentry(dn
, in
);
1677 if (IS_ERR(realdn
)) {
1678 err
= PTR_ERR(realdn
);
1686 ceph_dentry(dn
)->offset
= rde
->offset
;
1688 dvino
= ceph_vino(d_inode(parent
));
1689 update_dentry_lease(dn
, rde
->lease
, req
->r_session
,
1690 req
->r_request_started
, &tvino
, &dvino
);
1692 if (err
== 0 && skipped
== 0 && cache_ctl
.index
>= 0) {
1693 ret
= fill_readdir_cache(d_inode(parent
), dn
,
1703 if (err
== 0 && skipped
== 0) {
1704 set_bit(CEPH_MDS_R_DID_PREPOPULATE
, &req
->r_req_flags
);
1705 req
->r_readdir_cache_idx
= cache_ctl
.index
;
1707 ceph_readdir_cache_release(&cache_ctl
);
1708 dout("readdir_prepopulate done\n");
1712 bool ceph_inode_set_size(struct inode
*inode
, loff_t size
)
1714 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1717 spin_lock(&ci
->i_ceph_lock
);
1718 dout("set_size %p %llu -> %llu\n", inode
, inode
->i_size
, size
);
1719 i_size_write(inode
, size
);
1720 inode
->i_blocks
= calc_inode_blocks(size
);
1722 ret
= __ceph_should_report_size(ci
);
1724 spin_unlock(&ci
->i_ceph_lock
);
1729 * Write back inode data in a worker thread. (This can't be done
1730 * in the message handler context.)
1732 void ceph_queue_writeback(struct inode
*inode
)
1735 if (queue_work(ceph_inode_to_client(inode
)->wb_wq
,
1736 &ceph_inode(inode
)->i_wb_work
)) {
1737 dout("ceph_queue_writeback %p\n", inode
);
1739 dout("ceph_queue_writeback %p failed\n", inode
);
1744 static void ceph_writeback_work(struct work_struct
*work
)
1746 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1748 struct inode
*inode
= &ci
->vfs_inode
;
1750 dout("writeback %p\n", inode
);
1751 filemap_fdatawrite(&inode
->i_data
);
1756 * queue an async invalidation
1758 void ceph_queue_invalidate(struct inode
*inode
)
1761 if (queue_work(ceph_inode_to_client(inode
)->pg_inv_wq
,
1762 &ceph_inode(inode
)->i_pg_inv_work
)) {
1763 dout("ceph_queue_invalidate %p\n", inode
);
1765 dout("ceph_queue_invalidate %p failed\n", inode
);
1771 * Invalidate inode pages in a worker thread. (This can't be done
1772 * in the message handler context.)
1774 static void ceph_invalidate_work(struct work_struct
*work
)
1776 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1778 struct inode
*inode
= &ci
->vfs_inode
;
1779 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1783 mutex_lock(&ci
->i_truncate_mutex
);
1785 if (READ_ONCE(fsc
->mount_state
) == CEPH_MOUNT_SHUTDOWN
) {
1786 pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
1787 inode
, ceph_ino(inode
));
1788 mapping_set_error(inode
->i_mapping
, -EIO
);
1789 truncate_pagecache(inode
, 0);
1790 mutex_unlock(&ci
->i_truncate_mutex
);
1794 spin_lock(&ci
->i_ceph_lock
);
1795 dout("invalidate_pages %p gen %d revoking %d\n", inode
,
1796 ci
->i_rdcache_gen
, ci
->i_rdcache_revoking
);
1797 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
1798 if (__ceph_caps_revoking_other(ci
, NULL
, CEPH_CAP_FILE_CACHE
))
1800 spin_unlock(&ci
->i_ceph_lock
);
1801 mutex_unlock(&ci
->i_truncate_mutex
);
1804 orig_gen
= ci
->i_rdcache_gen
;
1805 spin_unlock(&ci
->i_ceph_lock
);
1807 if (invalidate_inode_pages2(inode
->i_mapping
) < 0) {
1808 pr_err("invalidate_pages %p fails\n", inode
);
1811 spin_lock(&ci
->i_ceph_lock
);
1812 if (orig_gen
== ci
->i_rdcache_gen
&&
1813 orig_gen
== ci
->i_rdcache_revoking
) {
1814 dout("invalidate_pages %p gen %d successful\n", inode
,
1816 ci
->i_rdcache_revoking
--;
1819 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1820 inode
, orig_gen
, ci
->i_rdcache_gen
,
1821 ci
->i_rdcache_revoking
);
1822 if (__ceph_caps_revoking_other(ci
, NULL
, CEPH_CAP_FILE_CACHE
))
1825 spin_unlock(&ci
->i_ceph_lock
);
1826 mutex_unlock(&ci
->i_truncate_mutex
);
1829 ceph_check_caps(ci
, 0, NULL
);
1835 * called by trunc_wq;
1837 * We also truncate in a separate thread as well.
1839 static void ceph_vmtruncate_work(struct work_struct
*work
)
1841 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1843 struct inode
*inode
= &ci
->vfs_inode
;
1845 dout("vmtruncate_work %p\n", inode
);
1846 __ceph_do_pending_vmtruncate(inode
);
1851 * Queue an async vmtruncate. If we fail to queue work, we will handle
1852 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1854 void ceph_queue_vmtruncate(struct inode
*inode
)
1856 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1860 if (queue_work(ceph_sb_to_client(inode
->i_sb
)->trunc_wq
,
1861 &ci
->i_vmtruncate_work
)) {
1862 dout("ceph_queue_vmtruncate %p\n", inode
);
1864 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1865 inode
, ci
->i_truncate_pending
);
1871 * Make sure any pending truncation is applied before doing anything
1872 * that may depend on it.
1874 void __ceph_do_pending_vmtruncate(struct inode
*inode
)
1876 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1878 int wrbuffer_refs
, finish
= 0;
1880 mutex_lock(&ci
->i_truncate_mutex
);
1882 spin_lock(&ci
->i_ceph_lock
);
1883 if (ci
->i_truncate_pending
== 0) {
1884 dout("__do_pending_vmtruncate %p none pending\n", inode
);
1885 spin_unlock(&ci
->i_ceph_lock
);
1886 mutex_unlock(&ci
->i_truncate_mutex
);
1891 * make sure any dirty snapped pages are flushed before we
1892 * possibly truncate them.. so write AND block!
1894 if (ci
->i_wrbuffer_ref_head
< ci
->i_wrbuffer_ref
) {
1895 spin_unlock(&ci
->i_ceph_lock
);
1896 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1898 filemap_write_and_wait_range(&inode
->i_data
, 0,
1899 inode
->i_sb
->s_maxbytes
);
1903 /* there should be no reader or writer */
1904 WARN_ON_ONCE(ci
->i_rd_ref
|| ci
->i_wr_ref
);
1906 to
= ci
->i_truncate_size
;
1907 wrbuffer_refs
= ci
->i_wrbuffer_ref
;
1908 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode
,
1909 ci
->i_truncate_pending
, to
);
1910 spin_unlock(&ci
->i_ceph_lock
);
1912 truncate_pagecache(inode
, to
);
1914 spin_lock(&ci
->i_ceph_lock
);
1915 if (to
== ci
->i_truncate_size
) {
1916 ci
->i_truncate_pending
= 0;
1919 spin_unlock(&ci
->i_ceph_lock
);
1923 mutex_unlock(&ci
->i_truncate_mutex
);
1925 if (wrbuffer_refs
== 0)
1926 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
1928 wake_up_all(&ci
->i_cap_wq
);
1934 static const struct inode_operations ceph_symlink_iops
= {
1935 .get_link
= simple_get_link
,
1936 .setattr
= ceph_setattr
,
1937 .getattr
= ceph_getattr
,
1938 .listxattr
= ceph_listxattr
,
1941 int __ceph_setattr(struct inode
*inode
, struct iattr
*attr
)
1943 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1944 const unsigned int ia_valid
= attr
->ia_valid
;
1945 struct ceph_mds_request
*req
;
1946 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1947 struct ceph_cap_flush
*prealloc_cf
;
1949 int release
= 0, dirtied
= 0;
1952 int inode_dirty_flags
= 0;
1953 bool lock_snap_rwsem
= false;
1955 prealloc_cf
= ceph_alloc_cap_flush();
1959 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_SETATTR
,
1962 ceph_free_cap_flush(prealloc_cf
);
1963 return PTR_ERR(req
);
1966 spin_lock(&ci
->i_ceph_lock
);
1967 issued
= __ceph_caps_issued(ci
, NULL
);
1969 if (!ci
->i_head_snapc
&&
1970 (issued
& (CEPH_CAP_ANY_EXCL
| CEPH_CAP_FILE_WR
))) {
1971 lock_snap_rwsem
= true;
1972 if (!down_read_trylock(&mdsc
->snap_rwsem
)) {
1973 spin_unlock(&ci
->i_ceph_lock
);
1974 down_read(&mdsc
->snap_rwsem
);
1975 spin_lock(&ci
->i_ceph_lock
);
1976 issued
= __ceph_caps_issued(ci
, NULL
);
1980 dout("setattr %p issued %s\n", inode
, ceph_cap_string(issued
));
1982 if (ia_valid
& ATTR_UID
) {
1983 dout("setattr %p uid %d -> %d\n", inode
,
1984 from_kuid(&init_user_ns
, inode
->i_uid
),
1985 from_kuid(&init_user_ns
, attr
->ia_uid
));
1986 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1987 inode
->i_uid
= attr
->ia_uid
;
1988 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1989 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1990 !uid_eq(attr
->ia_uid
, inode
->i_uid
)) {
1991 req
->r_args
.setattr
.uid
= cpu_to_le32(
1992 from_kuid(&init_user_ns
, attr
->ia_uid
));
1993 mask
|= CEPH_SETATTR_UID
;
1994 release
|= CEPH_CAP_AUTH_SHARED
;
1997 if (ia_valid
& ATTR_GID
) {
1998 dout("setattr %p gid %d -> %d\n", inode
,
1999 from_kgid(&init_user_ns
, inode
->i_gid
),
2000 from_kgid(&init_user_ns
, attr
->ia_gid
));
2001 if (issued
& CEPH_CAP_AUTH_EXCL
) {
2002 inode
->i_gid
= attr
->ia_gid
;
2003 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2004 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
2005 !gid_eq(attr
->ia_gid
, inode
->i_gid
)) {
2006 req
->r_args
.setattr
.gid
= cpu_to_le32(
2007 from_kgid(&init_user_ns
, attr
->ia_gid
));
2008 mask
|= CEPH_SETATTR_GID
;
2009 release
|= CEPH_CAP_AUTH_SHARED
;
2012 if (ia_valid
& ATTR_MODE
) {
2013 dout("setattr %p mode 0%o -> 0%o\n", inode
, inode
->i_mode
,
2015 if (issued
& CEPH_CAP_AUTH_EXCL
) {
2016 inode
->i_mode
= attr
->ia_mode
;
2017 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2018 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
2019 attr
->ia_mode
!= inode
->i_mode
) {
2020 inode
->i_mode
= attr
->ia_mode
;
2021 req
->r_args
.setattr
.mode
= cpu_to_le32(attr
->ia_mode
);
2022 mask
|= CEPH_SETATTR_MODE
;
2023 release
|= CEPH_CAP_AUTH_SHARED
;
2027 if (ia_valid
& ATTR_ATIME
) {
2028 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode
,
2029 inode
->i_atime
.tv_sec
, inode
->i_atime
.tv_nsec
,
2030 attr
->ia_atime
.tv_sec
, attr
->ia_atime
.tv_nsec
);
2031 if (issued
& CEPH_CAP_FILE_EXCL
) {
2032 ci
->i_time_warp_seq
++;
2033 inode
->i_atime
= attr
->ia_atime
;
2034 dirtied
|= CEPH_CAP_FILE_EXCL
;
2035 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
2036 timespec64_compare(&inode
->i_atime
,
2037 &attr
->ia_atime
) < 0) {
2038 inode
->i_atime
= attr
->ia_atime
;
2039 dirtied
|= CEPH_CAP_FILE_WR
;
2040 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
2041 !timespec64_equal(&inode
->i_atime
, &attr
->ia_atime
)) {
2042 ceph_encode_timespec64(&req
->r_args
.setattr
.atime
,
2044 mask
|= CEPH_SETATTR_ATIME
;
2045 release
|= CEPH_CAP_FILE_SHARED
|
2046 CEPH_CAP_FILE_RD
| CEPH_CAP_FILE_WR
;
2049 if (ia_valid
& ATTR_MTIME
) {
2050 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode
,
2051 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
2052 attr
->ia_mtime
.tv_sec
, attr
->ia_mtime
.tv_nsec
);
2053 if (issued
& CEPH_CAP_FILE_EXCL
) {
2054 ci
->i_time_warp_seq
++;
2055 inode
->i_mtime
= attr
->ia_mtime
;
2056 dirtied
|= CEPH_CAP_FILE_EXCL
;
2057 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
2058 timespec64_compare(&inode
->i_mtime
,
2059 &attr
->ia_mtime
) < 0) {
2060 inode
->i_mtime
= attr
->ia_mtime
;
2061 dirtied
|= CEPH_CAP_FILE_WR
;
2062 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
2063 !timespec64_equal(&inode
->i_mtime
, &attr
->ia_mtime
)) {
2064 ceph_encode_timespec64(&req
->r_args
.setattr
.mtime
,
2066 mask
|= CEPH_SETATTR_MTIME
;
2067 release
|= CEPH_CAP_FILE_SHARED
|
2068 CEPH_CAP_FILE_RD
| CEPH_CAP_FILE_WR
;
2071 if (ia_valid
& ATTR_SIZE
) {
2072 dout("setattr %p size %lld -> %lld\n", inode
,
2073 inode
->i_size
, attr
->ia_size
);
2074 if ((issued
& CEPH_CAP_FILE_EXCL
) &&
2075 attr
->ia_size
> inode
->i_size
) {
2076 i_size_write(inode
, attr
->ia_size
);
2077 inode
->i_blocks
= calc_inode_blocks(attr
->ia_size
);
2078 ci
->i_reported_size
= attr
->ia_size
;
2079 dirtied
|= CEPH_CAP_FILE_EXCL
;
2080 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
2081 attr
->ia_size
!= inode
->i_size
) {
2082 req
->r_args
.setattr
.size
= cpu_to_le64(attr
->ia_size
);
2083 req
->r_args
.setattr
.old_size
=
2084 cpu_to_le64(inode
->i_size
);
2085 mask
|= CEPH_SETATTR_SIZE
;
2086 release
|= CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_EXCL
|
2087 CEPH_CAP_FILE_RD
| CEPH_CAP_FILE_WR
;
2091 /* these do nothing */
2092 if (ia_valid
& ATTR_CTIME
) {
2093 bool only
= (ia_valid
& (ATTR_SIZE
|ATTR_MTIME
|ATTR_ATIME
|
2094 ATTR_MODE
|ATTR_UID
|ATTR_GID
)) == 0;
2095 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode
,
2096 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
2097 attr
->ia_ctime
.tv_sec
, attr
->ia_ctime
.tv_nsec
,
2098 only
? "ctime only" : "ignored");
2101 * if kernel wants to dirty ctime but nothing else,
2102 * we need to choose a cap to dirty under, or do
2103 * a almost-no-op setattr
2105 if (issued
& CEPH_CAP_AUTH_EXCL
)
2106 dirtied
|= CEPH_CAP_AUTH_EXCL
;
2107 else if (issued
& CEPH_CAP_FILE_EXCL
)
2108 dirtied
|= CEPH_CAP_FILE_EXCL
;
2109 else if (issued
& CEPH_CAP_XATTR_EXCL
)
2110 dirtied
|= CEPH_CAP_XATTR_EXCL
;
2112 mask
|= CEPH_SETATTR_CTIME
;
2115 if (ia_valid
& ATTR_FILE
)
2116 dout("setattr %p ATTR_FILE ... hrm!\n", inode
);
2119 inode_dirty_flags
= __ceph_mark_dirty_caps(ci
, dirtied
,
2121 inode
->i_ctime
= attr
->ia_ctime
;
2125 spin_unlock(&ci
->i_ceph_lock
);
2126 if (lock_snap_rwsem
)
2127 up_read(&mdsc
->snap_rwsem
);
2129 if (inode_dirty_flags
)
2130 __mark_inode_dirty(inode
, inode_dirty_flags
);
2134 req
->r_inode
= inode
;
2136 req
->r_inode_drop
= release
;
2137 req
->r_args
.setattr
.mask
= cpu_to_le32(mask
);
2138 req
->r_num_caps
= 1;
2139 req
->r_stamp
= attr
->ia_ctime
;
2140 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
2142 dout("setattr %p result=%d (%s locally, %d remote)\n", inode
, err
,
2143 ceph_cap_string(dirtied
), mask
);
2145 ceph_mdsc_put_request(req
);
2146 ceph_free_cap_flush(prealloc_cf
);
2148 if (err
>= 0 && (mask
& CEPH_SETATTR_SIZE
))
2149 __ceph_do_pending_vmtruncate(inode
);
2157 int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
)
2159 struct inode
*inode
= d_inode(dentry
);
2160 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
2163 if (ceph_snap(inode
) != CEPH_NOSNAP
)
2166 err
= setattr_prepare(dentry
, attr
);
2170 if ((attr
->ia_valid
& ATTR_SIZE
) &&
2171 attr
->ia_size
> max(inode
->i_size
, fsc
->max_file_size
))
2174 if ((attr
->ia_valid
& ATTR_SIZE
) &&
2175 ceph_quota_is_max_bytes_exceeded(inode
, attr
->ia_size
))
2178 err
= __ceph_setattr(inode
, attr
);
2180 if (err
>= 0 && (attr
->ia_valid
& ATTR_MODE
))
2181 err
= posix_acl_chmod(inode
, attr
->ia_mode
);
2187 * Verify that we have a lease on the given mask. If not,
2188 * do a getattr against an mds.
2190 int __ceph_do_getattr(struct inode
*inode
, struct page
*locked_page
,
2191 int mask
, bool force
)
2193 struct ceph_fs_client
*fsc
= ceph_sb_to_client(inode
->i_sb
);
2194 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
2195 struct ceph_mds_request
*req
;
2199 if (ceph_snap(inode
) == CEPH_SNAPDIR
) {
2200 dout("do_getattr inode %p SNAPDIR\n", inode
);
2204 dout("do_getattr inode %p mask %s mode 0%o\n",
2205 inode
, ceph_cap_string(mask
), inode
->i_mode
);
2206 if (!force
&& ceph_caps_issued_mask(ceph_inode(inode
), mask
, 1))
2209 mode
= (mask
& CEPH_STAT_RSTAT
) ? USE_AUTH_MDS
: USE_ANY_MDS
;
2210 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_GETATTR
, mode
);
2212 return PTR_ERR(req
);
2213 req
->r_inode
= inode
;
2215 req
->r_num_caps
= 1;
2216 req
->r_args
.getattr
.mask
= cpu_to_le32(mask
);
2217 req
->r_locked_page
= locked_page
;
2218 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
2219 if (locked_page
&& err
== 0) {
2220 u64 inline_version
= req
->r_reply_info
.targeti
.inline_version
;
2221 if (inline_version
== 0) {
2222 /* the reply is supposed to contain inline data */
2224 } else if (inline_version
== CEPH_INLINE_NONE
) {
2227 err
= req
->r_reply_info
.targeti
.inline_len
;
2230 ceph_mdsc_put_request(req
);
2231 dout("do_getattr result=%d\n", err
);
2237 * Check inode permissions. We verify we have a valid value for
2238 * the AUTH cap, then call the generic handler.
2240 int ceph_permission(struct inode
*inode
, int mask
)
2244 if (mask
& MAY_NOT_BLOCK
)
2247 err
= ceph_do_getattr(inode
, CEPH_CAP_AUTH_SHARED
, false);
2250 err
= generic_permission(inode
, mask
);
2255 * Get all attributes. Hopefully somedata we'll have a statlite()
2256 * and can limit the fields we require to be accurate.
2258 int ceph_getattr(const struct path
*path
, struct kstat
*stat
,
2259 u32 request_mask
, unsigned int flags
)
2261 struct inode
*inode
= d_inode(path
->dentry
);
2262 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2265 err
= ceph_do_getattr(inode
, CEPH_STAT_CAP_INODE_ALL
, false);
2267 generic_fillattr(inode
, stat
);
2268 stat
->ino
= ceph_translate_ino(inode
->i_sb
, inode
->i_ino
);
2269 if (ceph_snap(inode
) != CEPH_NOSNAP
)
2270 stat
->dev
= ceph_snap(inode
);
2273 if (S_ISDIR(inode
->i_mode
)) {
2274 if (ceph_test_mount_opt(ceph_sb_to_client(inode
->i_sb
),
2276 stat
->size
= ci
->i_rbytes
;
2278 stat
->size
= ci
->i_files
+ ci
->i_subdirs
;
2280 stat
->blksize
= 65536;
2282 * Some applications rely on the number of st_nlink
2283 * value on directories to be either 0 (if unlinked)
2284 * or 2 + number of subdirectories.
2286 if (stat
->nlink
== 1)
2287 /* '.' + '..' + subdirs */
2288 stat
->nlink
= 1 + 1 + ci
->i_subdirs
;