1 #include "ceph_debug.h"
3 #include <linux/module.h>
5 #include <linux/smp_lock.h>
6 #include <linux/slab.h>
7 #include <linux/string.h>
8 #include <linux/uaccess.h>
9 #include <linux/kernel.h>
10 #include <linux/namei.h>
11 #include <linux/writeback.h>
12 #include <linux/vmalloc.h>
13 #include <linux/pagevec.h>
19 * Ceph inode operations
21 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
22 * setattr, etc.), xattr helpers, and helpers for assimilating
23 * metadata returned by the MDS into our cache.
25 * Also define helpers for doing asynchronous writeback, invalidation,
26 * and truncation for the benefit of those who can't afford to block
27 * (typically because they are in the message handler path).
30 static const struct inode_operations ceph_symlink_iops
;
32 static void ceph_invalidate_work(struct work_struct
*work
);
33 static void ceph_writeback_work(struct work_struct
*work
);
34 static void ceph_vmtruncate_work(struct work_struct
*work
);
37 * find or create an inode, given the ceph ino number
39 struct inode
*ceph_get_inode(struct super_block
*sb
, struct ceph_vino vino
)
42 ino_t t
= ceph_vino_to_ino(vino
);
44 inode
= iget5_locked(sb
, t
, ceph_ino_compare
, ceph_set_ino_cb
, &vino
);
46 return ERR_PTR(-ENOMEM
);
47 if (inode
->i_state
& I_NEW
) {
48 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
49 inode
, ceph_vinop(inode
), (u64
)inode
->i_ino
);
50 unlock_new_inode(inode
);
53 dout("get_inode on %lu=%llx.%llx got %p\n", inode
->i_ino
, vino
.ino
,
59 * get/constuct snapdir inode for a given directory
61 struct inode
*ceph_get_snapdir(struct inode
*parent
)
63 struct ceph_vino vino
= {
64 .ino
= ceph_ino(parent
),
67 struct inode
*inode
= ceph_get_inode(parent
->i_sb
, vino
);
68 struct ceph_inode_info
*ci
= ceph_inode(inode
);
70 BUG_ON(!S_ISDIR(parent
->i_mode
));
73 inode
->i_mode
= parent
->i_mode
;
74 inode
->i_uid
= parent
->i_uid
;
75 inode
->i_gid
= parent
->i_gid
;
76 inode
->i_op
= &ceph_dir_iops
;
77 inode
->i_fop
= &ceph_dir_fops
;
78 ci
->i_snap_caps
= CEPH_CAP_PIN
; /* so we can open */
83 const struct inode_operations ceph_file_iops
= {
84 .permission
= ceph_permission
,
85 .setattr
= ceph_setattr
,
86 .getattr
= ceph_getattr
,
87 .setxattr
= ceph_setxattr
,
88 .getxattr
= ceph_getxattr
,
89 .listxattr
= ceph_listxattr
,
90 .removexattr
= ceph_removexattr
,
95 * We use a 'frag tree' to keep track of the MDS's directory fragments
96 * for a given inode (usually there is just a single fragment). We
97 * need to know when a child frag is delegated to a new MDS, or when
98 * it is flagged as replicated, so we can direct our requests
103 * find/create a frag in the tree
105 static struct ceph_inode_frag
*__get_or_create_frag(struct ceph_inode_info
*ci
,
109 struct rb_node
*parent
= NULL
;
110 struct ceph_inode_frag
*frag
;
113 p
= &ci
->i_fragtree
.rb_node
;
116 frag
= rb_entry(parent
, struct ceph_inode_frag
, node
);
117 c
= ceph_frag_compare(f
, frag
->frag
);
126 frag
= kmalloc(sizeof(*frag
), GFP_NOFS
);
128 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
129 "frag %x\n", &ci
->vfs_inode
,
130 ceph_vinop(&ci
->vfs_inode
), f
);
131 return ERR_PTR(-ENOMEM
);
138 rb_link_node(&frag
->node
, parent
, p
);
139 rb_insert_color(&frag
->node
, &ci
->i_fragtree
);
141 dout("get_or_create_frag added %llx.%llx frag %x\n",
142 ceph_vinop(&ci
->vfs_inode
), f
);
147 * find a specific frag @f
149 struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
, u32 f
)
151 struct rb_node
*n
= ci
->i_fragtree
.rb_node
;
154 struct ceph_inode_frag
*frag
=
155 rb_entry(n
, struct ceph_inode_frag
, node
);
156 int c
= ceph_frag_compare(f
, frag
->frag
);
168 * Choose frag containing the given value @v. If @pfrag is
169 * specified, copy the frag delegation info to the caller if
172 u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
173 struct ceph_inode_frag
*pfrag
,
176 u32 t
= ceph_frag_make(0, 0);
177 struct ceph_inode_frag
*frag
;
184 mutex_lock(&ci
->i_fragtree_mutex
);
186 WARN_ON(!ceph_frag_contains_value(t
, v
));
187 frag
= __ceph_find_frag(ci
, t
);
189 break; /* t is a leaf */
190 if (frag
->split_by
== 0) {
192 memcpy(pfrag
, frag
, sizeof(*pfrag
));
199 nway
= 1 << frag
->split_by
;
200 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v
, t
,
201 frag
->split_by
, nway
);
202 for (i
= 0; i
< nway
; i
++) {
203 n
= ceph_frag_make_child(t
, frag
->split_by
, i
);
204 if (ceph_frag_contains_value(n
, v
)) {
211 dout("choose_frag(%x) = %x\n", v
, t
);
213 mutex_unlock(&ci
->i_fragtree_mutex
);
218 * Process dirfrag (delegation) info from the mds. Include leaf
219 * fragment in tree ONLY if ndist > 0. Otherwise, only
220 * branches/splits are included in i_fragtree)
222 static int ceph_fill_dirfrag(struct inode
*inode
,
223 struct ceph_mds_reply_dirfrag
*dirinfo
)
225 struct ceph_inode_info
*ci
= ceph_inode(inode
);
226 struct ceph_inode_frag
*frag
;
227 u32 id
= le32_to_cpu(dirinfo
->frag
);
228 int mds
= le32_to_cpu(dirinfo
->auth
);
229 int ndist
= le32_to_cpu(dirinfo
->ndist
);
233 mutex_lock(&ci
->i_fragtree_mutex
);
235 /* no delegation info needed. */
236 frag
= __ceph_find_frag(ci
, id
);
239 if (frag
->split_by
== 0) {
240 /* tree leaf, remove */
241 dout("fill_dirfrag removed %llx.%llx frag %x"
242 " (no ref)\n", ceph_vinop(inode
), id
);
243 rb_erase(&frag
->node
, &ci
->i_fragtree
);
246 /* tree branch, keep and clear */
247 dout("fill_dirfrag cleared %llx.%llx frag %x"
248 " referral\n", ceph_vinop(inode
), id
);
256 /* find/add this frag to store mds delegation info */
257 frag
= __get_or_create_frag(ci
, id
);
259 /* this is not the end of the world; we can continue
260 with bad/inaccurate delegation info */
261 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
262 ceph_vinop(inode
), le32_to_cpu(dirinfo
->frag
));
268 frag
->ndist
= min_t(u32
, ndist
, CEPH_MAX_DIRFRAG_REP
);
269 for (i
= 0; i
< frag
->ndist
; i
++)
270 frag
->dist
[i
] = le32_to_cpu(dirinfo
->dist
[i
]);
271 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
272 ceph_vinop(inode
), frag
->frag
, frag
->ndist
);
275 mutex_unlock(&ci
->i_fragtree_mutex
);
281 * initialize a newly allocated inode.
283 struct inode
*ceph_alloc_inode(struct super_block
*sb
)
285 struct ceph_inode_info
*ci
;
288 ci
= kmem_cache_alloc(ceph_inode_cachep
, GFP_NOFS
);
292 dout("alloc_inode %p\n", &ci
->vfs_inode
);
295 ci
->i_time_warp_seq
= 0;
296 ci
->i_ceph_flags
= 0;
297 ci
->i_release_count
= 0;
298 ci
->i_symlink
= NULL
;
300 ci
->i_fragtree
= RB_ROOT
;
301 mutex_init(&ci
->i_fragtree_mutex
);
303 ci
->i_xattrs
.blob
= NULL
;
304 ci
->i_xattrs
.prealloc_blob
= NULL
;
305 ci
->i_xattrs
.dirty
= false;
306 ci
->i_xattrs
.index
= RB_ROOT
;
307 ci
->i_xattrs
.count
= 0;
308 ci
->i_xattrs
.names_size
= 0;
309 ci
->i_xattrs
.vals_size
= 0;
310 ci
->i_xattrs
.version
= 0;
311 ci
->i_xattrs
.index_version
= 0;
313 ci
->i_caps
= RB_ROOT
;
314 ci
->i_auth_cap
= NULL
;
315 ci
->i_dirty_caps
= 0;
316 ci
->i_flushing_caps
= 0;
317 INIT_LIST_HEAD(&ci
->i_dirty_item
);
318 INIT_LIST_HEAD(&ci
->i_flushing_item
);
319 ci
->i_cap_flush_seq
= 0;
320 ci
->i_cap_flush_last_tid
= 0;
321 memset(&ci
->i_cap_flush_tid
, 0, sizeof(ci
->i_cap_flush_tid
));
322 init_waitqueue_head(&ci
->i_cap_wq
);
323 ci
->i_hold_caps_min
= 0;
324 ci
->i_hold_caps_max
= 0;
325 INIT_LIST_HEAD(&ci
->i_cap_delay_list
);
326 ci
->i_cap_exporting_mds
= 0;
327 ci
->i_cap_exporting_mseq
= 0;
328 ci
->i_cap_exporting_issued
= 0;
329 INIT_LIST_HEAD(&ci
->i_cap_snaps
);
330 ci
->i_head_snapc
= NULL
;
333 for (i
= 0; i
< CEPH_FILE_MODE_NUM
; i
++)
334 ci
->i_nr_by_mode
[i
] = 0;
336 ci
->i_truncate_seq
= 0;
337 ci
->i_truncate_size
= 0;
338 ci
->i_truncate_pending
= 0;
341 ci
->i_reported_size
= 0;
342 ci
->i_wanted_max_size
= 0;
343 ci
->i_requested_max_size
= 0;
347 ci
->i_rdcache_ref
= 0;
349 ci
->i_wrbuffer_ref
= 0;
350 ci
->i_wrbuffer_ref_head
= 0;
351 ci
->i_shared_gen
= 0;
352 ci
->i_rdcache_gen
= 0;
353 ci
->i_rdcache_revoking
= 0;
355 INIT_LIST_HEAD(&ci
->i_unsafe_writes
);
356 INIT_LIST_HEAD(&ci
->i_unsafe_dirops
);
357 spin_lock_init(&ci
->i_unsafe_lock
);
359 ci
->i_snap_realm
= NULL
;
360 INIT_LIST_HEAD(&ci
->i_snap_realm_item
);
361 INIT_LIST_HEAD(&ci
->i_snap_flush_item
);
363 INIT_WORK(&ci
->i_wb_work
, ceph_writeback_work
);
364 INIT_WORK(&ci
->i_pg_inv_work
, ceph_invalidate_work
);
366 INIT_WORK(&ci
->i_vmtruncate_work
, ceph_vmtruncate_work
);
368 return &ci
->vfs_inode
;
371 void ceph_destroy_inode(struct inode
*inode
)
373 struct ceph_inode_info
*ci
= ceph_inode(inode
);
374 struct ceph_inode_frag
*frag
;
377 dout("destroy_inode %p ino %llx.%llx\n", inode
, ceph_vinop(inode
));
379 ceph_queue_caps_release(inode
);
382 * we may still have a snap_realm reference if there are stray
383 * caps in i_cap_exporting_issued or i_snap_caps.
385 if (ci
->i_snap_realm
) {
386 struct ceph_mds_client
*mdsc
=
387 &ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
388 struct ceph_snap_realm
*realm
= ci
->i_snap_realm
;
390 dout(" dropping residual ref to snap realm %p\n", realm
);
391 spin_lock(&realm
->inodes_with_caps_lock
);
392 list_del_init(&ci
->i_snap_realm_item
);
393 spin_unlock(&realm
->inodes_with_caps_lock
);
394 ceph_put_snap_realm(mdsc
, realm
);
397 kfree(ci
->i_symlink
);
398 while ((n
= rb_first(&ci
->i_fragtree
)) != NULL
) {
399 frag
= rb_entry(n
, struct ceph_inode_frag
, node
);
400 rb_erase(n
, &ci
->i_fragtree
);
404 __ceph_destroy_xattrs(ci
);
405 if (ci
->i_xattrs
.blob
)
406 ceph_buffer_put(ci
->i_xattrs
.blob
);
407 if (ci
->i_xattrs
.prealloc_blob
)
408 ceph_buffer_put(ci
->i_xattrs
.prealloc_blob
);
410 kmem_cache_free(ceph_inode_cachep
, ci
);
415 * Helpers to fill in size, ctime, mtime, and atime. We have to be
416 * careful because either the client or MDS may have more up to date
417 * info, depending on which capabilities are held, and whether
418 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
419 * and size are monotonically increasing, except when utimes() or
420 * truncate() increments the corresponding _seq values.)
422 int ceph_fill_file_size(struct inode
*inode
, int issued
,
423 u32 truncate_seq
, u64 truncate_size
, u64 size
)
425 struct ceph_inode_info
*ci
= ceph_inode(inode
);
428 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) > 0 ||
429 (truncate_seq
== ci
->i_truncate_seq
&& size
> inode
->i_size
)) {
430 dout("size %lld -> %llu\n", inode
->i_size
, size
);
431 inode
->i_size
= size
;
432 inode
->i_blocks
= (size
+ (1<<9) - 1) >> 9;
433 ci
->i_reported_size
= size
;
434 if (truncate_seq
!= ci
->i_truncate_seq
) {
435 dout("truncate_seq %u -> %u\n",
436 ci
->i_truncate_seq
, truncate_seq
);
437 ci
->i_truncate_seq
= truncate_seq
;
439 * If we hold relevant caps, or in the case where we're
440 * not the only client referencing this file and we
441 * don't hold those caps, then we need to check whether
442 * the file is either opened or mmaped
444 if ((issued
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_RD
|
445 CEPH_CAP_FILE_WR
|CEPH_CAP_FILE_BUFFER
|
447 CEPH_CAP_FILE_LAZYIO
)) ||
448 mapping_mapped(inode
->i_mapping
) ||
449 __ceph_caps_file_wanted(ci
)) {
450 ci
->i_truncate_pending
++;
455 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) >= 0 &&
456 ci
->i_truncate_size
!= truncate_size
) {
457 dout("truncate_size %lld -> %llu\n", ci
->i_truncate_size
,
459 ci
->i_truncate_size
= truncate_size
;
464 void ceph_fill_file_time(struct inode
*inode
, int issued
,
465 u64 time_warp_seq
, struct timespec
*ctime
,
466 struct timespec
*mtime
, struct timespec
*atime
)
468 struct ceph_inode_info
*ci
= ceph_inode(inode
);
471 if (issued
& (CEPH_CAP_FILE_EXCL
|
473 CEPH_CAP_FILE_BUFFER
)) {
474 if (timespec_compare(ctime
, &inode
->i_ctime
) > 0) {
475 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
476 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
477 ctime
->tv_sec
, ctime
->tv_nsec
);
478 inode
->i_ctime
= *ctime
;
480 if (ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) > 0) {
481 /* the MDS did a utimes() */
482 dout("mtime %ld.%09ld -> %ld.%09ld "
484 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
485 mtime
->tv_sec
, mtime
->tv_nsec
,
486 ci
->i_time_warp_seq
, (int)time_warp_seq
);
488 inode
->i_mtime
= *mtime
;
489 inode
->i_atime
= *atime
;
490 ci
->i_time_warp_seq
= time_warp_seq
;
491 } else if (time_warp_seq
== ci
->i_time_warp_seq
) {
492 /* nobody did utimes(); take the max */
493 if (timespec_compare(mtime
, &inode
->i_mtime
) > 0) {
494 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
495 inode
->i_mtime
.tv_sec
,
496 inode
->i_mtime
.tv_nsec
,
497 mtime
->tv_sec
, mtime
->tv_nsec
);
498 inode
->i_mtime
= *mtime
;
500 if (timespec_compare(atime
, &inode
->i_atime
) > 0) {
501 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
502 inode
->i_atime
.tv_sec
,
503 inode
->i_atime
.tv_nsec
,
504 atime
->tv_sec
, atime
->tv_nsec
);
505 inode
->i_atime
= *atime
;
507 } else if (issued
& CEPH_CAP_FILE_EXCL
) {
508 /* we did a utimes(); ignore mds values */
513 /* we have no write caps; whatever the MDS says is true */
514 if (ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) >= 0) {
515 inode
->i_ctime
= *ctime
;
516 inode
->i_mtime
= *mtime
;
517 inode
->i_atime
= *atime
;
518 ci
->i_time_warp_seq
= time_warp_seq
;
523 if (warn
) /* time_warp_seq shouldn't go backwards */
524 dout("%p mds time_warp_seq %llu < %u\n",
525 inode
, time_warp_seq
, ci
->i_time_warp_seq
);
529 * Populate an inode based on info from mds. May be called on new or
532 static int fill_inode(struct inode
*inode
,
533 struct ceph_mds_reply_info_in
*iinfo
,
534 struct ceph_mds_reply_dirfrag
*dirinfo
,
535 struct ceph_mds_session
*session
,
536 unsigned long ttl_from
, int cap_fmode
,
537 struct ceph_cap_reservation
*caps_reservation
)
539 struct ceph_mds_reply_inode
*info
= iinfo
->in
;
540 struct ceph_inode_info
*ci
= ceph_inode(inode
);
542 int issued
, implemented
;
543 struct timespec mtime
, atime
, ctime
;
545 struct ceph_buffer
*xattr_blob
= NULL
;
549 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
550 inode
, ceph_vinop(inode
), le64_to_cpu(info
->version
),
554 * prealloc xattr data, if it looks like we'll need it. only
555 * if len > 4 (meaning there are actually xattrs; the first 4
556 * bytes are the xattr count).
558 if (iinfo
->xattr_len
> 4) {
559 xattr_blob
= ceph_buffer_new(iinfo
->xattr_len
, GFP_NOFS
);
561 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
565 spin_lock(&inode
->i_lock
);
568 * provided version will be odd if inode value is projected,
569 * even if stable. skip the update if we have a newer info
570 * (e.g., due to inode info racing form multiple MDSs), or if
571 * we are getting projected (unstable) inode info.
573 if (le64_to_cpu(info
->version
) > 0 &&
574 (ci
->i_version
& ~1) > le64_to_cpu(info
->version
))
577 issued
= __ceph_caps_issued(ci
, &implemented
);
578 issued
|= implemented
| __ceph_caps_dirty(ci
);
581 ci
->i_version
= le64_to_cpu(info
->version
);
583 inode
->i_rdev
= le32_to_cpu(info
->rdev
);
585 if ((issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
586 inode
->i_mode
= le32_to_cpu(info
->mode
);
587 inode
->i_uid
= le32_to_cpu(info
->uid
);
588 inode
->i_gid
= le32_to_cpu(info
->gid
);
589 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
590 inode
->i_uid
, inode
->i_gid
);
593 if ((issued
& CEPH_CAP_LINK_EXCL
) == 0)
594 inode
->i_nlink
= le32_to_cpu(info
->nlink
);
596 /* be careful with mtime, atime, size */
597 ceph_decode_timespec(&atime
, &info
->atime
);
598 ceph_decode_timespec(&mtime
, &info
->mtime
);
599 ceph_decode_timespec(&ctime
, &info
->ctime
);
600 queue_trunc
= ceph_fill_file_size(inode
, issued
,
601 le32_to_cpu(info
->truncate_seq
),
602 le64_to_cpu(info
->truncate_size
),
603 le64_to_cpu(info
->size
));
604 ceph_fill_file_time(inode
, issued
,
605 le32_to_cpu(info
->time_warp_seq
),
606 &ctime
, &mtime
, &atime
);
608 ci
->i_max_size
= le64_to_cpu(info
->max_size
);
609 ci
->i_layout
= info
->layout
;
610 inode
->i_blkbits
= fls(le32_to_cpu(info
->layout
.fl_stripe_unit
)) - 1;
613 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
614 if ((issued
& CEPH_CAP_XATTR_EXCL
) == 0 &&
615 le64_to_cpu(info
->xattr_version
) > ci
->i_xattrs
.version
) {
616 if (ci
->i_xattrs
.blob
)
617 ceph_buffer_put(ci
->i_xattrs
.blob
);
618 ci
->i_xattrs
.blob
= xattr_blob
;
620 memcpy(ci
->i_xattrs
.blob
->vec
.iov_base
,
621 iinfo
->xattr_data
, iinfo
->xattr_len
);
622 ci
->i_xattrs
.version
= le64_to_cpu(info
->xattr_version
);
626 inode
->i_mapping
->a_ops
= &ceph_aops
;
627 inode
->i_mapping
->backing_dev_info
=
628 &ceph_sb_to_client(inode
->i_sb
)->backing_dev_info
;
630 switch (inode
->i_mode
& S_IFMT
) {
635 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
636 inode
->i_op
= &ceph_file_iops
;
639 inode
->i_op
= &ceph_file_iops
;
640 inode
->i_fop
= &ceph_file_fops
;
643 inode
->i_op
= &ceph_symlink_iops
;
644 if (!ci
->i_symlink
) {
645 int symlen
= iinfo
->symlink_len
;
648 BUG_ON(symlen
!= inode
->i_size
);
649 spin_unlock(&inode
->i_lock
);
652 sym
= kmalloc(symlen
+1, GFP_NOFS
);
655 memcpy(sym
, iinfo
->symlink
, symlen
);
658 spin_lock(&inode
->i_lock
);
662 kfree(sym
); /* lost a race */
666 inode
->i_op
= &ceph_dir_iops
;
667 inode
->i_fop
= &ceph_dir_fops
;
669 ci
->i_files
= le64_to_cpu(info
->files
);
670 ci
->i_subdirs
= le64_to_cpu(info
->subdirs
);
671 ci
->i_rbytes
= le64_to_cpu(info
->rbytes
);
672 ci
->i_rfiles
= le64_to_cpu(info
->rfiles
);
673 ci
->i_rsubdirs
= le64_to_cpu(info
->rsubdirs
);
674 ceph_decode_timespec(&ci
->i_rctime
, &info
->rctime
);
676 /* set dir completion flag? */
677 if (ci
->i_files
== 0 && ci
->i_subdirs
== 0 &&
678 ceph_snap(inode
) == CEPH_NOSNAP
&&
679 (le32_to_cpu(info
->cap
.caps
) & CEPH_CAP_FILE_SHARED
) &&
680 (ci
->i_ceph_flags
& CEPH_I_COMPLETE
) == 0) {
681 dout(" marking %p complete (empty)\n", inode
);
682 ci
->i_ceph_flags
|= CEPH_I_COMPLETE
;
683 ci
->i_max_offset
= 2;
686 /* it may be better to set st_size in getattr instead? */
687 if (ceph_test_opt(ceph_sb_to_client(inode
->i_sb
), RBYTES
))
688 inode
->i_size
= ci
->i_rbytes
;
691 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
692 ceph_vinop(inode
), inode
->i_mode
);
696 spin_unlock(&inode
->i_lock
);
698 /* queue truncate if we saw i_size decrease */
700 ceph_queue_vmtruncate(inode
);
702 /* populate frag tree */
703 /* FIXME: move me up, if/when version reflects fragtree changes */
704 nsplits
= le32_to_cpu(info
->fragtree
.nsplits
);
705 mutex_lock(&ci
->i_fragtree_mutex
);
706 for (i
= 0; i
< nsplits
; i
++) {
707 u32 id
= le32_to_cpu(info
->fragtree
.splits
[i
].frag
);
708 struct ceph_inode_frag
*frag
= __get_or_create_frag(ci
, id
);
712 frag
->split_by
= le32_to_cpu(info
->fragtree
.splits
[i
].by
);
713 dout(" frag %x split by %d\n", frag
->frag
, frag
->split_by
);
715 mutex_unlock(&ci
->i_fragtree_mutex
);
717 /* were we issued a capability? */
718 if (info
->cap
.caps
) {
719 if (ceph_snap(inode
) == CEPH_NOSNAP
) {
720 ceph_add_cap(inode
, session
,
721 le64_to_cpu(info
->cap
.cap_id
),
723 le32_to_cpu(info
->cap
.caps
),
724 le32_to_cpu(info
->cap
.wanted
),
725 le32_to_cpu(info
->cap
.seq
),
726 le32_to_cpu(info
->cap
.mseq
),
727 le64_to_cpu(info
->cap
.realm
),
731 spin_lock(&inode
->i_lock
);
732 dout(" %p got snap_caps %s\n", inode
,
733 ceph_cap_string(le32_to_cpu(info
->cap
.caps
)));
734 ci
->i_snap_caps
|= le32_to_cpu(info
->cap
.caps
);
736 __ceph_get_fmode(ci
, cap_fmode
);
737 spin_unlock(&inode
->i_lock
);
739 } else if (cap_fmode
>= 0) {
740 pr_warning("mds issued no caps on %llx.%llx\n",
742 __ceph_get_fmode(ci
, cap_fmode
);
745 /* update delegation info? */
747 ceph_fill_dirfrag(inode
, dirinfo
);
753 ceph_buffer_put(xattr_blob
);
758 * caller should hold session s_mutex.
760 static void update_dentry_lease(struct dentry
*dentry
,
761 struct ceph_mds_reply_lease
*lease
,
762 struct ceph_mds_session
*session
,
763 unsigned long from_time
)
765 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
766 long unsigned duration
= le32_to_cpu(lease
->duration_ms
);
767 long unsigned ttl
= from_time
+ (duration
* HZ
) / 1000;
768 long unsigned half_ttl
= from_time
+ (duration
* HZ
/ 2) / 1000;
771 /* only track leases on regular dentries */
772 if (dentry
->d_op
!= &ceph_dentry_ops
)
775 spin_lock(&dentry
->d_lock
);
776 dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n",
777 dentry
, le16_to_cpu(lease
->mask
), duration
, ttl
);
779 /* make lease_rdcache_gen match directory */
780 dir
= dentry
->d_parent
->d_inode
;
781 di
->lease_shared_gen
= ceph_inode(dir
)->i_shared_gen
;
783 if (lease
->mask
== 0)
786 if (di
->lease_gen
== session
->s_cap_gen
&&
787 time_before(ttl
, dentry
->d_time
))
788 goto out_unlock
; /* we already have a newer lease. */
790 if (di
->lease_session
&& di
->lease_session
!= session
)
793 ceph_dentry_lru_touch(dentry
);
795 if (!di
->lease_session
)
796 di
->lease_session
= ceph_get_mds_session(session
);
797 di
->lease_gen
= session
->s_cap_gen
;
798 di
->lease_seq
= le32_to_cpu(lease
->seq
);
799 di
->lease_renew_after
= half_ttl
;
800 di
->lease_renew_from
= 0;
801 dentry
->d_time
= ttl
;
803 spin_unlock(&dentry
->d_lock
);
808 * Set dentry's directory position based on the current dir's max, and
809 * order it in d_subdirs, so that dcache_readdir behaves.
811 static void ceph_set_dentry_offset(struct dentry
*dn
)
813 struct dentry
*dir
= dn
->d_parent
;
814 struct inode
*inode
= dn
->d_parent
->d_inode
;
815 struct ceph_dentry_info
*di
;
819 di
= ceph_dentry(dn
);
821 spin_lock(&inode
->i_lock
);
822 if ((ceph_inode(inode
)->i_ceph_flags
& CEPH_I_COMPLETE
) == 0) {
823 spin_unlock(&inode
->i_lock
);
826 di
->offset
= ceph_inode(inode
)->i_max_offset
++;
827 spin_unlock(&inode
->i_lock
);
829 spin_lock(&dcache_lock
);
830 spin_lock(&dn
->d_lock
);
831 list_move(&dn
->d_u
.d_child
, &dir
->d_subdirs
);
832 dout("set_dentry_offset %p %lld (%p %p)\n", dn
, di
->offset
,
833 dn
->d_u
.d_child
.prev
, dn
->d_u
.d_child
.next
);
834 spin_unlock(&dn
->d_lock
);
835 spin_unlock(&dcache_lock
);
839 * splice a dentry to an inode.
840 * caller must hold directory i_mutex for this to be safe.
842 * we will only rehash the resulting dentry if @prehash is
843 * true; @prehash will be set to false (for the benefit of
844 * the caller) if we fail.
846 static struct dentry
*splice_dentry(struct dentry
*dn
, struct inode
*in
,
849 struct dentry
*realdn
;
853 /* dn must be unhashed */
856 realdn
= d_materialise_unique(dn
, in
);
857 if (IS_ERR(realdn
)) {
858 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
859 PTR_ERR(realdn
), dn
, in
, ceph_vinop(in
));
861 *prehash
= false; /* don't rehash on error */
862 dn
= realdn
; /* note realdn contains the error */
865 dout("dn %p (%d) spliced with %p (%d) "
866 "inode %p ino %llx.%llx\n",
867 dn
, atomic_read(&dn
->d_count
),
868 realdn
, atomic_read(&realdn
->d_count
),
869 realdn
->d_inode
, ceph_vinop(realdn
->d_inode
));
873 BUG_ON(!ceph_dentry(dn
));
874 dout("dn %p attached to %p ino %llx.%llx\n",
875 dn
, dn
->d_inode
, ceph_vinop(dn
->d_inode
));
877 if ((!prehash
|| *prehash
) && d_unhashed(dn
))
879 ceph_set_dentry_offset(dn
);
885 * Incorporate results into the local cache. This is either just
886 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
889 * A reply may contain
890 * a directory inode along with a dentry.
891 * and/or a target inode
893 * Called with snap_rwsem (read).
895 int ceph_fill_trace(struct super_block
*sb
, struct ceph_mds_request
*req
,
896 struct ceph_mds_session
*session
)
898 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
899 struct inode
*in
= NULL
;
900 struct ceph_mds_reply_inode
*ininfo
;
901 struct ceph_vino vino
;
902 struct ceph_client
*client
= ceph_sb_to_client(sb
);
906 dout("fill_trace %p is_dentry %d is_target %d\n", req
,
907 rinfo
->head
->is_dentry
, rinfo
->head
->is_target
);
913 * If we resend completed ops to a recovering mds, we get no
914 * trace. Since that is very rare, pretend this is the case
915 * to ensure the 'no trace' handlers in the callers behave.
917 * Fill in inodes unconditionally to avoid breaking cap
920 if (rinfo
->head
->op
& CEPH_MDS_OP_WRITE
) {
921 pr_info("fill_trace faking empty trace on %lld %s\n",
922 req
->r_tid
, ceph_mds_op_name(rinfo
->head
->op
));
923 if (rinfo
->head
->is_dentry
) {
924 rinfo
->head
->is_dentry
= 0;
925 err
= fill_inode(req
->r_locked_dir
,
926 &rinfo
->diri
, rinfo
->dirfrag
,
927 session
, req
->r_request_started
, -1);
929 if (rinfo
->head
->is_target
) {
930 rinfo
->head
->is_target
= 0;
931 ininfo
= rinfo
->targeti
.in
;
932 vino
.ino
= le64_to_cpu(ininfo
->ino
);
933 vino
.snap
= le64_to_cpu(ininfo
->snapid
);
934 in
= ceph_get_inode(sb
, vino
);
935 err
= fill_inode(in
, &rinfo
->targeti
, NULL
,
936 session
, req
->r_request_started
,
943 if (!rinfo
->head
->is_target
&& !rinfo
->head
->is_dentry
) {
944 dout("fill_trace reply is empty!\n");
945 if (rinfo
->head
->result
== 0 && req
->r_locked_dir
)
946 ceph_invalidate_dir_request(req
);
950 if (rinfo
->head
->is_dentry
) {
951 struct inode
*dir
= req
->r_locked_dir
;
953 err
= fill_inode(dir
, &rinfo
->diri
, rinfo
->dirfrag
,
954 session
, req
->r_request_started
, -1,
955 &req
->r_caps_reservation
);
961 * ignore null lease/binding on snapdir ENOENT, or else we
962 * will have trouble splicing in the virtual snapdir later
964 if (rinfo
->head
->is_dentry
&& !req
->r_aborted
&&
965 (rinfo
->head
->is_target
|| strncmp(req
->r_dentry
->d_name
.name
,
966 client
->mount_args
->snapdir_name
,
967 req
->r_dentry
->d_name
.len
))) {
969 * lookup link rename : null -> possibly existing inode
970 * mknod symlink mkdir : null -> new inode
971 * unlink : linked -> null
973 struct inode
*dir
= req
->r_locked_dir
;
974 struct dentry
*dn
= req
->r_dentry
;
975 bool have_dir_cap
, have_lease
;
979 BUG_ON(dn
->d_parent
->d_inode
!= dir
);
980 BUG_ON(ceph_ino(dir
) !=
981 le64_to_cpu(rinfo
->diri
.in
->ino
));
982 BUG_ON(ceph_snap(dir
) !=
983 le64_to_cpu(rinfo
->diri
.in
->snapid
));
985 /* do we have a lease on the whole dir? */
987 (le32_to_cpu(rinfo
->diri
.in
->cap
.caps
) &
988 CEPH_CAP_FILE_SHARED
);
990 /* do we have a dn lease? */
991 have_lease
= have_dir_cap
||
992 (le16_to_cpu(rinfo
->dlease
->mask
) &
996 dout("fill_trace no dentry lease or dir cap\n");
999 if (req
->r_old_dentry
&& req
->r_op
== CEPH_MDS_OP_RENAME
) {
1000 dout(" src %p '%.*s' dst %p '%.*s'\n",
1002 req
->r_old_dentry
->d_name
.len
,
1003 req
->r_old_dentry
->d_name
.name
,
1004 dn
, dn
->d_name
.len
, dn
->d_name
.name
);
1005 dout("fill_trace doing d_move %p -> %p\n",
1006 req
->r_old_dentry
, dn
);
1008 /* d_move screws up d_subdirs order */
1009 ceph_i_clear(dir
, CEPH_I_COMPLETE
);
1011 d_move(req
->r_old_dentry
, dn
);
1012 dout(" src %p '%.*s' dst %p '%.*s'\n",
1014 req
->r_old_dentry
->d_name
.len
,
1015 req
->r_old_dentry
->d_name
.name
,
1016 dn
, dn
->d_name
.len
, dn
->d_name
.name
);
1018 /* ensure target dentry is invalidated, despite
1019 rehashing bug in vfs_rename_dir */
1020 ceph_invalidate_dentry_lease(dn
);
1022 /* take overwritten dentry's readdir offset */
1023 dout("dn %p gets %p offset %lld (old offset %lld)\n",
1024 req
->r_old_dentry
, dn
, ceph_dentry(dn
)->offset
,
1025 ceph_dentry(req
->r_old_dentry
)->offset
);
1026 ceph_dentry(req
->r_old_dentry
)->offset
=
1027 ceph_dentry(dn
)->offset
;
1029 dn
= req
->r_old_dentry
; /* use old_dentry */
1034 if (!rinfo
->head
->is_target
) {
1035 dout("fill_trace null dentry\n");
1037 dout("d_delete %p\n", dn
);
1040 dout("d_instantiate %p NULL\n", dn
);
1041 d_instantiate(dn
, NULL
);
1042 if (have_lease
&& d_unhashed(dn
))
1044 update_dentry_lease(dn
, rinfo
->dlease
,
1046 req
->r_request_started
);
1051 /* attach proper inode */
1052 ininfo
= rinfo
->targeti
.in
;
1053 vino
.ino
= le64_to_cpu(ininfo
->ino
);
1054 vino
.snap
= le64_to_cpu(ininfo
->snapid
);
1056 in
= ceph_get_inode(sb
, vino
);
1058 pr_err("fill_trace bad get_inode "
1059 "%llx.%llx\n", vino
.ino
, vino
.snap
);
1064 dn
= splice_dentry(dn
, in
, &have_lease
);
1069 req
->r_dentry
= dn
; /* may have spliced */
1071 } else if (ceph_ino(in
) == vino
.ino
&&
1072 ceph_snap(in
) == vino
.snap
) {
1075 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1076 dn
, in
, ceph_ino(in
), ceph_snap(in
),
1077 vino
.ino
, vino
.snap
);
1083 update_dentry_lease(dn
, rinfo
->dlease
, session
,
1084 req
->r_request_started
);
1085 dout(" final dn %p\n", dn
);
1087 } else if (req
->r_op
== CEPH_MDS_OP_LOOKUPSNAP
||
1088 req
->r_op
== CEPH_MDS_OP_MKSNAP
) {
1089 struct dentry
*dn
= req
->r_dentry
;
1091 /* fill out a snapdir LOOKUPSNAP dentry */
1093 BUG_ON(!req
->r_locked_dir
);
1094 BUG_ON(ceph_snap(req
->r_locked_dir
) != CEPH_SNAPDIR
);
1095 ininfo
= rinfo
->targeti
.in
;
1096 vino
.ino
= le64_to_cpu(ininfo
->ino
);
1097 vino
.snap
= le64_to_cpu(ininfo
->snapid
);
1098 in
= ceph_get_inode(sb
, vino
);
1100 pr_err("fill_inode get_inode badness %llx.%llx\n",
1101 vino
.ino
, vino
.snap
);
1106 dout(" linking snapped dir %p to dn %p\n", in
, dn
);
1107 dn
= splice_dentry(dn
, in
, NULL
);
1112 req
->r_dentry
= dn
; /* may have spliced */
1114 rinfo
->head
->is_dentry
= 1; /* fool notrace handlers */
1117 if (rinfo
->head
->is_target
) {
1118 vino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1119 vino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1121 if (in
== NULL
|| ceph_ino(in
) != vino
.ino
||
1122 ceph_snap(in
) != vino
.snap
) {
1123 in
= ceph_get_inode(sb
, vino
);
1129 req
->r_target_inode
= in
;
1131 err
= fill_inode(in
,
1132 &rinfo
->targeti
, NULL
,
1133 session
, req
->r_request_started
,
1134 (le32_to_cpu(rinfo
->head
->result
) == 0) ?
1136 &req
->r_caps_reservation
);
1138 pr_err("fill_inode badness %p %llx.%llx\n",
1139 in
, ceph_vinop(in
));
1145 dout("fill_trace done err=%d\n", err
);
1150 * Prepopulate our cache with readdir results, leases, etc.
1152 int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
1153 struct ceph_mds_session
*session
)
1155 struct dentry
*parent
= req
->r_dentry
;
1156 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1161 struct inode
*snapdir
= NULL
;
1162 struct ceph_mds_request_head
*rhead
= req
->r_request
->front
.iov_base
;
1163 u64 frag
= le32_to_cpu(rhead
->args
.readdir
.frag
);
1164 struct ceph_dentry_info
*di
;
1166 if (le32_to_cpu(rinfo
->head
->op
) == CEPH_MDS_OP_LSSNAP
) {
1167 snapdir
= ceph_get_snapdir(parent
->d_inode
);
1168 parent
= d_find_alias(snapdir
);
1169 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1170 rinfo
->dir_nr
, parent
);
1172 dout("readdir_prepopulate %d items under dn %p\n",
1173 rinfo
->dir_nr
, parent
);
1175 ceph_fill_dirfrag(parent
->d_inode
, rinfo
->dir_dir
);
1178 for (i
= 0; i
< rinfo
->dir_nr
; i
++) {
1179 struct ceph_vino vino
;
1181 dname
.name
= rinfo
->dir_dname
[i
];
1182 dname
.len
= rinfo
->dir_dname_len
[i
];
1183 dname
.hash
= full_name_hash(dname
.name
, dname
.len
);
1185 vino
.ino
= le64_to_cpu(rinfo
->dir_in
[i
].in
->ino
);
1186 vino
.snap
= le64_to_cpu(rinfo
->dir_in
[i
].in
->snapid
);
1189 dn
= d_lookup(parent
, &dname
);
1190 dout("d_lookup on parent=%p name=%.*s got %p\n",
1191 parent
, dname
.len
, dname
.name
, dn
);
1194 dn
= d_alloc(parent
, &dname
);
1195 dout("d_alloc %p '%.*s' = %p\n", parent
,
1196 dname
.len
, dname
.name
, dn
);
1198 dout("d_alloc badness\n");
1202 err
= ceph_init_dentry(dn
);
1207 } else if (dn
->d_inode
&&
1208 (ceph_ino(dn
->d_inode
) != vino
.ino
||
1209 ceph_snap(dn
->d_inode
) != vino
.snap
)) {
1210 dout(" dn %p points to wrong inode %p\n",
1216 /* reorder parent's d_subdirs */
1217 spin_lock(&dcache_lock
);
1218 spin_lock(&dn
->d_lock
);
1219 list_move(&dn
->d_u
.d_child
, &parent
->d_subdirs
);
1220 spin_unlock(&dn
->d_lock
);
1221 spin_unlock(&dcache_lock
);
1225 di
->offset
= ceph_make_fpos(frag
, i
+ req
->r_readdir_offset
);
1231 in
= ceph_get_inode(parent
->d_sb
, vino
);
1233 dout("new_inode badness\n");
1239 dn
= splice_dentry(dn
, in
, NULL
);
1244 if (fill_inode(in
, &rinfo
->dir_in
[i
], NULL
, session
,
1245 req
->r_request_started
, -1,
1246 &req
->r_caps_reservation
) < 0) {
1247 pr_err("fill_inode badness on %p\n", in
);
1251 update_dentry_lease(dn
, rinfo
->dir_dlease
[i
],
1253 req
->r_request_started
);
1258 req
->r_did_prepopulate
= true;
1265 dout("readdir_prepopulate done\n");
1269 int ceph_inode_set_size(struct inode
*inode
, loff_t size
)
1271 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1274 spin_lock(&inode
->i_lock
);
1275 dout("set_size %p %llu -> %llu\n", inode
, inode
->i_size
, size
);
1276 inode
->i_size
= size
;
1277 inode
->i_blocks
= (size
+ (1 << 9) - 1) >> 9;
1279 /* tell the MDS if we are approaching max_size */
1280 if ((size
<< 1) >= ci
->i_max_size
&&
1281 (ci
->i_reported_size
<< 1) < ci
->i_max_size
)
1284 spin_unlock(&inode
->i_lock
);
1289 * Write back inode data in a worker thread. (This can't be done
1290 * in the message handler context.)
1292 void ceph_queue_writeback(struct inode
*inode
)
1294 if (queue_work(ceph_inode_to_client(inode
)->wb_wq
,
1295 &ceph_inode(inode
)->i_wb_work
)) {
1296 dout("ceph_queue_writeback %p\n", inode
);
1299 dout("ceph_queue_writeback %p failed\n", inode
);
1303 static void ceph_writeback_work(struct work_struct
*work
)
1305 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1307 struct inode
*inode
= &ci
->vfs_inode
;
1309 dout("writeback %p\n", inode
);
1310 filemap_fdatawrite(&inode
->i_data
);
1315 * queue an async invalidation
1317 void ceph_queue_invalidate(struct inode
*inode
)
1319 if (queue_work(ceph_inode_to_client(inode
)->pg_inv_wq
,
1320 &ceph_inode(inode
)->i_pg_inv_work
)) {
1321 dout("ceph_queue_invalidate %p\n", inode
);
1324 dout("ceph_queue_invalidate %p failed\n", inode
);
1329 * invalidate any pages that are not dirty or under writeback. this
1330 * includes pages that are clean and mapped.
1332 static void ceph_invalidate_nondirty_pages(struct address_space
*mapping
)
1334 struct pagevec pvec
;
1338 pagevec_init(&pvec
, 0);
1339 while (pagevec_lookup(&pvec
, mapping
, next
, PAGEVEC_SIZE
)) {
1340 for (i
= 0; i
< pagevec_count(&pvec
); i
++) {
1341 struct page
*page
= pvec
.pages
[i
];
1344 (PageDirty(page
) || PageWriteback(page
));
1347 skip_page
= !trylock_page(page
);
1350 * We really shouldn't be looking at the ->index of an
1351 * unlocked page. But we're not allowed to lock these
1352 * pages. So we rely upon nobody altering the ->index
1353 * of this (pinned-by-us) page.
1355 index
= page
->index
;
1363 generic_error_remove_page(mapping
, page
);
1366 pagevec_release(&pvec
);
1372 * Invalidate inode pages in a worker thread. (This can't be done
1373 * in the message handler context.)
1375 static void ceph_invalidate_work(struct work_struct
*work
)
1377 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1379 struct inode
*inode
= &ci
->vfs_inode
;
1383 spin_lock(&inode
->i_lock
);
1384 dout("invalidate_pages %p gen %d revoking %d\n", inode
,
1385 ci
->i_rdcache_gen
, ci
->i_rdcache_revoking
);
1386 if (ci
->i_rdcache_gen
== 0 ||
1387 ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
1388 BUG_ON(ci
->i_rdcache_revoking
> ci
->i_rdcache_gen
);
1390 ci
->i_rdcache_revoking
= 0;
1391 spin_unlock(&inode
->i_lock
);
1394 orig_gen
= ci
->i_rdcache_gen
;
1395 spin_unlock(&inode
->i_lock
);
1397 ceph_invalidate_nondirty_pages(inode
->i_mapping
);
1399 spin_lock(&inode
->i_lock
);
1400 if (orig_gen
== ci
->i_rdcache_gen
) {
1401 dout("invalidate_pages %p gen %d successful\n", inode
,
1403 ci
->i_rdcache_gen
= 0;
1404 ci
->i_rdcache_revoking
= 0;
1407 dout("invalidate_pages %p gen %d raced, gen now %d\n",
1408 inode
, orig_gen
, ci
->i_rdcache_gen
);
1410 spin_unlock(&inode
->i_lock
);
1413 ceph_check_caps(ci
, 0, NULL
);
1420 * called by trunc_wq; take i_mutex ourselves
1422 * We also truncate in a separate thread as well.
1424 static void ceph_vmtruncate_work(struct work_struct
*work
)
1426 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1428 struct inode
*inode
= &ci
->vfs_inode
;
1430 dout("vmtruncate_work %p\n", inode
);
1431 mutex_lock(&inode
->i_mutex
);
1432 __ceph_do_pending_vmtruncate(inode
);
1433 mutex_unlock(&inode
->i_mutex
);
1438 * Queue an async vmtruncate. If we fail to queue work, we will handle
1439 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1441 void ceph_queue_vmtruncate(struct inode
*inode
)
1443 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1445 if (queue_work(ceph_sb_to_client(inode
->i_sb
)->trunc_wq
,
1446 &ci
->i_vmtruncate_work
)) {
1447 dout("ceph_queue_vmtruncate %p\n", inode
);
1450 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1451 inode
, ci
->i_truncate_pending
);
1456 * called with i_mutex held.
1458 * Make sure any pending truncation is applied before doing anything
1459 * that may depend on it.
1461 void __ceph_do_pending_vmtruncate(struct inode
*inode
)
1463 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1465 int wrbuffer_refs
, wake
= 0;
1468 spin_lock(&inode
->i_lock
);
1469 if (ci
->i_truncate_pending
== 0) {
1470 dout("__do_pending_vmtruncate %p none pending\n", inode
);
1471 spin_unlock(&inode
->i_lock
);
1476 * make sure any dirty snapped pages are flushed before we
1477 * possibly truncate them.. so write AND block!
1479 if (ci
->i_wrbuffer_ref_head
< ci
->i_wrbuffer_ref
) {
1480 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1482 spin_unlock(&inode
->i_lock
);
1483 filemap_write_and_wait_range(&inode
->i_data
, 0,
1484 inode
->i_sb
->s_maxbytes
);
1488 to
= ci
->i_truncate_size
;
1489 wrbuffer_refs
= ci
->i_wrbuffer_ref
;
1490 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode
,
1491 ci
->i_truncate_pending
, to
);
1492 spin_unlock(&inode
->i_lock
);
1494 truncate_inode_pages(inode
->i_mapping
, to
);
1496 spin_lock(&inode
->i_lock
);
1497 ci
->i_truncate_pending
--;
1498 if (ci
->i_truncate_pending
== 0)
1500 spin_unlock(&inode
->i_lock
);
1502 if (wrbuffer_refs
== 0)
1503 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
1505 wake_up_all(&ci
->i_cap_wq
);
1512 static void *ceph_sym_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
1514 struct ceph_inode_info
*ci
= ceph_inode(dentry
->d_inode
);
1515 nd_set_link(nd
, ci
->i_symlink
);
1519 static const struct inode_operations ceph_symlink_iops
= {
1520 .readlink
= generic_readlink
,
1521 .follow_link
= ceph_sym_follow_link
,
1527 int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1529 struct inode
*inode
= dentry
->d_inode
;
1530 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1531 struct inode
*parent_inode
= dentry
->d_parent
->d_inode
;
1532 const unsigned int ia_valid
= attr
->ia_valid
;
1533 struct ceph_mds_request
*req
;
1534 struct ceph_mds_client
*mdsc
= &ceph_sb_to_client(dentry
->d_sb
)->mdsc
;
1536 int release
= 0, dirtied
= 0;
1540 if (ceph_snap(inode
) != CEPH_NOSNAP
)
1543 __ceph_do_pending_vmtruncate(inode
);
1545 err
= inode_change_ok(inode
, attr
);
1549 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_SETATTR
,
1552 return PTR_ERR(req
);
1554 spin_lock(&inode
->i_lock
);
1555 issued
= __ceph_caps_issued(ci
, NULL
);
1556 dout("setattr %p issued %s\n", inode
, ceph_cap_string(issued
));
1558 if (ia_valid
& ATTR_UID
) {
1559 dout("setattr %p uid %d -> %d\n", inode
,
1560 inode
->i_uid
, attr
->ia_uid
);
1561 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1562 inode
->i_uid
= attr
->ia_uid
;
1563 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1564 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1565 attr
->ia_uid
!= inode
->i_uid
) {
1566 req
->r_args
.setattr
.uid
= cpu_to_le32(attr
->ia_uid
);
1567 mask
|= CEPH_SETATTR_UID
;
1568 release
|= CEPH_CAP_AUTH_SHARED
;
1571 if (ia_valid
& ATTR_GID
) {
1572 dout("setattr %p gid %d -> %d\n", inode
,
1573 inode
->i_gid
, attr
->ia_gid
);
1574 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1575 inode
->i_gid
= attr
->ia_gid
;
1576 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1577 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1578 attr
->ia_gid
!= inode
->i_gid
) {
1579 req
->r_args
.setattr
.gid
= cpu_to_le32(attr
->ia_gid
);
1580 mask
|= CEPH_SETATTR_GID
;
1581 release
|= CEPH_CAP_AUTH_SHARED
;
1584 if (ia_valid
& ATTR_MODE
) {
1585 dout("setattr %p mode 0%o -> 0%o\n", inode
, inode
->i_mode
,
1587 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1588 inode
->i_mode
= attr
->ia_mode
;
1589 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1590 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1591 attr
->ia_mode
!= inode
->i_mode
) {
1592 req
->r_args
.setattr
.mode
= cpu_to_le32(attr
->ia_mode
);
1593 mask
|= CEPH_SETATTR_MODE
;
1594 release
|= CEPH_CAP_AUTH_SHARED
;
1598 if (ia_valid
& ATTR_ATIME
) {
1599 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode
,
1600 inode
->i_atime
.tv_sec
, inode
->i_atime
.tv_nsec
,
1601 attr
->ia_atime
.tv_sec
, attr
->ia_atime
.tv_nsec
);
1602 if (issued
& CEPH_CAP_FILE_EXCL
) {
1603 ci
->i_time_warp_seq
++;
1604 inode
->i_atime
= attr
->ia_atime
;
1605 dirtied
|= CEPH_CAP_FILE_EXCL
;
1606 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
1607 timespec_compare(&inode
->i_atime
,
1608 &attr
->ia_atime
) < 0) {
1609 inode
->i_atime
= attr
->ia_atime
;
1610 dirtied
|= CEPH_CAP_FILE_WR
;
1611 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
1612 !timespec_equal(&inode
->i_atime
, &attr
->ia_atime
)) {
1613 ceph_encode_timespec(&req
->r_args
.setattr
.atime
,
1615 mask
|= CEPH_SETATTR_ATIME
;
1616 release
|= CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_RD
|
1620 if (ia_valid
& ATTR_MTIME
) {
1621 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode
,
1622 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
1623 attr
->ia_mtime
.tv_sec
, attr
->ia_mtime
.tv_nsec
);
1624 if (issued
& CEPH_CAP_FILE_EXCL
) {
1625 ci
->i_time_warp_seq
++;
1626 inode
->i_mtime
= attr
->ia_mtime
;
1627 dirtied
|= CEPH_CAP_FILE_EXCL
;
1628 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
1629 timespec_compare(&inode
->i_mtime
,
1630 &attr
->ia_mtime
) < 0) {
1631 inode
->i_mtime
= attr
->ia_mtime
;
1632 dirtied
|= CEPH_CAP_FILE_WR
;
1633 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
1634 !timespec_equal(&inode
->i_mtime
, &attr
->ia_mtime
)) {
1635 ceph_encode_timespec(&req
->r_args
.setattr
.mtime
,
1637 mask
|= CEPH_SETATTR_MTIME
;
1638 release
|= CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_RD
|
1642 if (ia_valid
& ATTR_SIZE
) {
1643 dout("setattr %p size %lld -> %lld\n", inode
,
1644 inode
->i_size
, attr
->ia_size
);
1645 if (attr
->ia_size
> inode
->i_sb
->s_maxbytes
) {
1649 if ((issued
& CEPH_CAP_FILE_EXCL
) &&
1650 attr
->ia_size
> inode
->i_size
) {
1651 inode
->i_size
= attr
->ia_size
;
1653 (attr
->ia_size
+ (1 << 9) - 1) >> 9;
1654 inode
->i_ctime
= attr
->ia_ctime
;
1655 ci
->i_reported_size
= attr
->ia_size
;
1656 dirtied
|= CEPH_CAP_FILE_EXCL
;
1657 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
1658 attr
->ia_size
!= inode
->i_size
) {
1659 req
->r_args
.setattr
.size
= cpu_to_le64(attr
->ia_size
);
1660 req
->r_args
.setattr
.old_size
=
1661 cpu_to_le64(inode
->i_size
);
1662 mask
|= CEPH_SETATTR_SIZE
;
1663 release
|= CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_RD
|
1668 /* these do nothing */
1669 if (ia_valid
& ATTR_CTIME
) {
1670 bool only
= (ia_valid
& (ATTR_SIZE
|ATTR_MTIME
|ATTR_ATIME
|
1671 ATTR_MODE
|ATTR_UID
|ATTR_GID
)) == 0;
1672 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode
,
1673 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
1674 attr
->ia_ctime
.tv_sec
, attr
->ia_ctime
.tv_nsec
,
1675 only
? "ctime only" : "ignored");
1676 inode
->i_ctime
= attr
->ia_ctime
;
1679 * if kernel wants to dirty ctime but nothing else,
1680 * we need to choose a cap to dirty under, or do
1681 * a almost-no-op setattr
1683 if (issued
& CEPH_CAP_AUTH_EXCL
)
1684 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1685 else if (issued
& CEPH_CAP_FILE_EXCL
)
1686 dirtied
|= CEPH_CAP_FILE_EXCL
;
1687 else if (issued
& CEPH_CAP_XATTR_EXCL
)
1688 dirtied
|= CEPH_CAP_XATTR_EXCL
;
1690 mask
|= CEPH_SETATTR_CTIME
;
1693 if (ia_valid
& ATTR_FILE
)
1694 dout("setattr %p ATTR_FILE ... hrm!\n", inode
);
1697 __ceph_mark_dirty_caps(ci
, dirtied
);
1698 inode
->i_ctime
= CURRENT_TIME
;
1702 spin_unlock(&inode
->i_lock
);
1705 req
->r_inode
= igrab(inode
);
1706 req
->r_inode_drop
= release
;
1707 req
->r_args
.setattr
.mask
= cpu_to_le32(mask
);
1708 req
->r_num_caps
= 1;
1709 err
= ceph_mdsc_do_request(mdsc
, parent_inode
, req
);
1711 dout("setattr %p result=%d (%s locally, %d remote)\n", inode
, err
,
1712 ceph_cap_string(dirtied
), mask
);
1714 ceph_mdsc_put_request(req
);
1715 __ceph_do_pending_vmtruncate(inode
);
1718 spin_unlock(&inode
->i_lock
);
1719 ceph_mdsc_put_request(req
);
1724 * Verify that we have a lease on the given mask. If not,
1725 * do a getattr against an mds.
1727 int ceph_do_getattr(struct inode
*inode
, int mask
)
1729 struct ceph_client
*client
= ceph_sb_to_client(inode
->i_sb
);
1730 struct ceph_mds_client
*mdsc
= &client
->mdsc
;
1731 struct ceph_mds_request
*req
;
1734 if (ceph_snap(inode
) == CEPH_SNAPDIR
) {
1735 dout("do_getattr inode %p SNAPDIR\n", inode
);
1739 dout("do_getattr inode %p mask %s\n", inode
, ceph_cap_string(mask
));
1740 if (ceph_caps_issued_mask(ceph_inode(inode
), mask
, 1))
1743 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_GETATTR
, USE_ANY_MDS
);
1745 return PTR_ERR(req
);
1746 req
->r_inode
= igrab(inode
);
1747 req
->r_num_caps
= 1;
1748 req
->r_args
.getattr
.mask
= cpu_to_le32(mask
);
1749 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
1750 ceph_mdsc_put_request(req
);
1751 dout("do_getattr result=%d\n", err
);
1757 * Check inode permissions. We verify we have a valid value for
1758 * the AUTH cap, then call the generic handler.
1760 int ceph_permission(struct inode
*inode
, int mask
)
1762 int err
= ceph_do_getattr(inode
, CEPH_CAP_AUTH_SHARED
);
1765 err
= generic_permission(inode
, mask
, NULL
);
1770 * Get all attributes. Hopefully somedata we'll have a statlite()
1771 * and can limit the fields we require to be accurate.
1773 int ceph_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1776 struct inode
*inode
= dentry
->d_inode
;
1777 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1780 err
= ceph_do_getattr(inode
, CEPH_STAT_CAP_INODE_ALL
);
1782 generic_fillattr(inode
, stat
);
1783 stat
->ino
= inode
->i_ino
;
1784 if (ceph_snap(inode
) != CEPH_NOSNAP
)
1785 stat
->dev
= ceph_snap(inode
);
1788 if (S_ISDIR(inode
->i_mode
)) {
1789 stat
->size
= ci
->i_rbytes
;
1791 stat
->blksize
= 65536;