1 #include <linux/ceph/ceph_debug.h>
3 #include <linux/module.h>
5 #include <linux/slab.h>
6 #include <linux/string.h>
7 #include <linux/uaccess.h>
8 #include <linux/kernel.h>
9 #include <linux/namei.h>
10 #include <linux/writeback.h>
11 #include <linux/vmalloc.h>
12 #include <linux/pagevec.h>
15 #include "mds_client.h"
16 #include <linux/ceph/decode.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 memset(&ci
->i_dir_layout
, 0, sizeof(ci
->i_dir_layout
));
302 ci
->i_fragtree
= RB_ROOT
;
303 mutex_init(&ci
->i_fragtree_mutex
);
305 ci
->i_xattrs
.blob
= NULL
;
306 ci
->i_xattrs
.prealloc_blob
= NULL
;
307 ci
->i_xattrs
.dirty
= false;
308 ci
->i_xattrs
.index
= RB_ROOT
;
309 ci
->i_xattrs
.count
= 0;
310 ci
->i_xattrs
.names_size
= 0;
311 ci
->i_xattrs
.vals_size
= 0;
312 ci
->i_xattrs
.version
= 0;
313 ci
->i_xattrs
.index_version
= 0;
315 ci
->i_caps
= RB_ROOT
;
316 ci
->i_auth_cap
= NULL
;
317 ci
->i_dirty_caps
= 0;
318 ci
->i_flushing_caps
= 0;
319 INIT_LIST_HEAD(&ci
->i_dirty_item
);
320 INIT_LIST_HEAD(&ci
->i_flushing_item
);
321 ci
->i_cap_flush_seq
= 0;
322 ci
->i_cap_flush_last_tid
= 0;
323 memset(&ci
->i_cap_flush_tid
, 0, sizeof(ci
->i_cap_flush_tid
));
324 init_waitqueue_head(&ci
->i_cap_wq
);
325 ci
->i_hold_caps_min
= 0;
326 ci
->i_hold_caps_max
= 0;
327 INIT_LIST_HEAD(&ci
->i_cap_delay_list
);
328 ci
->i_cap_exporting_mds
= 0;
329 ci
->i_cap_exporting_mseq
= 0;
330 ci
->i_cap_exporting_issued
= 0;
331 INIT_LIST_HEAD(&ci
->i_cap_snaps
);
332 ci
->i_head_snapc
= NULL
;
335 for (i
= 0; i
< CEPH_FILE_MODE_NUM
; i
++)
336 ci
->i_nr_by_mode
[i
] = 0;
338 ci
->i_truncate_seq
= 0;
339 ci
->i_truncate_size
= 0;
340 ci
->i_truncate_pending
= 0;
343 ci
->i_reported_size
= 0;
344 ci
->i_wanted_max_size
= 0;
345 ci
->i_requested_max_size
= 0;
349 ci
->i_rdcache_ref
= 0;
351 ci
->i_wrbuffer_ref
= 0;
352 ci
->i_wrbuffer_ref_head
= 0;
353 ci
->i_shared_gen
= 0;
354 ci
->i_rdcache_gen
= 0;
355 ci
->i_rdcache_revoking
= 0;
357 INIT_LIST_HEAD(&ci
->i_unsafe_writes
);
358 INIT_LIST_HEAD(&ci
->i_unsafe_dirops
);
359 spin_lock_init(&ci
->i_unsafe_lock
);
361 ci
->i_snap_realm
= NULL
;
362 INIT_LIST_HEAD(&ci
->i_snap_realm_item
);
363 INIT_LIST_HEAD(&ci
->i_snap_flush_item
);
365 INIT_WORK(&ci
->i_wb_work
, ceph_writeback_work
);
366 INIT_WORK(&ci
->i_pg_inv_work
, ceph_invalidate_work
);
368 INIT_WORK(&ci
->i_vmtruncate_work
, ceph_vmtruncate_work
);
370 return &ci
->vfs_inode
;
373 void ceph_destroy_inode(struct inode
*inode
)
375 struct ceph_inode_info
*ci
= ceph_inode(inode
);
376 struct ceph_inode_frag
*frag
;
379 dout("destroy_inode %p ino %llx.%llx\n", inode
, ceph_vinop(inode
));
381 ceph_queue_caps_release(inode
);
384 * we may still have a snap_realm reference if there are stray
385 * caps in i_cap_exporting_issued or i_snap_caps.
387 if (ci
->i_snap_realm
) {
388 struct ceph_mds_client
*mdsc
=
389 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
390 struct ceph_snap_realm
*realm
= ci
->i_snap_realm
;
392 dout(" dropping residual ref to snap realm %p\n", realm
);
393 spin_lock(&realm
->inodes_with_caps_lock
);
394 list_del_init(&ci
->i_snap_realm_item
);
395 spin_unlock(&realm
->inodes_with_caps_lock
);
396 ceph_put_snap_realm(mdsc
, realm
);
399 kfree(ci
->i_symlink
);
400 while ((n
= rb_first(&ci
->i_fragtree
)) != NULL
) {
401 frag
= rb_entry(n
, struct ceph_inode_frag
, node
);
402 rb_erase(n
, &ci
->i_fragtree
);
406 __ceph_destroy_xattrs(ci
);
407 if (ci
->i_xattrs
.blob
)
408 ceph_buffer_put(ci
->i_xattrs
.blob
);
409 if (ci
->i_xattrs
.prealloc_blob
)
410 ceph_buffer_put(ci
->i_xattrs
.prealloc_blob
);
412 kmem_cache_free(ceph_inode_cachep
, ci
);
417 * Helpers to fill in size, ctime, mtime, and atime. We have to be
418 * careful because either the client or MDS may have more up to date
419 * info, depending on which capabilities are held, and whether
420 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
421 * and size are monotonically increasing, except when utimes() or
422 * truncate() increments the corresponding _seq values.)
424 int ceph_fill_file_size(struct inode
*inode
, int issued
,
425 u32 truncate_seq
, u64 truncate_size
, u64 size
)
427 struct ceph_inode_info
*ci
= ceph_inode(inode
);
430 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) > 0 ||
431 (truncate_seq
== ci
->i_truncate_seq
&& size
> inode
->i_size
)) {
432 dout("size %lld -> %llu\n", inode
->i_size
, size
);
433 inode
->i_size
= size
;
434 inode
->i_blocks
= (size
+ (1<<9) - 1) >> 9;
435 ci
->i_reported_size
= size
;
436 if (truncate_seq
!= ci
->i_truncate_seq
) {
437 dout("truncate_seq %u -> %u\n",
438 ci
->i_truncate_seq
, truncate_seq
);
439 ci
->i_truncate_seq
= truncate_seq
;
441 * If we hold relevant caps, or in the case where we're
442 * not the only client referencing this file and we
443 * don't hold those caps, then we need to check whether
444 * the file is either opened or mmaped
446 if ((issued
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_RD
|
447 CEPH_CAP_FILE_WR
|CEPH_CAP_FILE_BUFFER
|
449 CEPH_CAP_FILE_LAZYIO
)) ||
450 mapping_mapped(inode
->i_mapping
) ||
451 __ceph_caps_file_wanted(ci
)) {
452 ci
->i_truncate_pending
++;
457 if (ceph_seq_cmp(truncate_seq
, ci
->i_truncate_seq
) >= 0 &&
458 ci
->i_truncate_size
!= truncate_size
) {
459 dout("truncate_size %lld -> %llu\n", ci
->i_truncate_size
,
461 ci
->i_truncate_size
= truncate_size
;
466 void ceph_fill_file_time(struct inode
*inode
, int issued
,
467 u64 time_warp_seq
, struct timespec
*ctime
,
468 struct timespec
*mtime
, struct timespec
*atime
)
470 struct ceph_inode_info
*ci
= ceph_inode(inode
);
473 if (issued
& (CEPH_CAP_FILE_EXCL
|
475 CEPH_CAP_FILE_BUFFER
|
477 CEPH_CAP_XATTR_EXCL
)) {
478 if (timespec_compare(ctime
, &inode
->i_ctime
) > 0) {
479 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
480 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
481 ctime
->tv_sec
, ctime
->tv_nsec
);
482 inode
->i_ctime
= *ctime
;
484 if (ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) > 0) {
485 /* the MDS did a utimes() */
486 dout("mtime %ld.%09ld -> %ld.%09ld "
488 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
489 mtime
->tv_sec
, mtime
->tv_nsec
,
490 ci
->i_time_warp_seq
, (int)time_warp_seq
);
492 inode
->i_mtime
= *mtime
;
493 inode
->i_atime
= *atime
;
494 ci
->i_time_warp_seq
= time_warp_seq
;
495 } else if (time_warp_seq
== ci
->i_time_warp_seq
) {
496 /* nobody did utimes(); take the max */
497 if (timespec_compare(mtime
, &inode
->i_mtime
) > 0) {
498 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
499 inode
->i_mtime
.tv_sec
,
500 inode
->i_mtime
.tv_nsec
,
501 mtime
->tv_sec
, mtime
->tv_nsec
);
502 inode
->i_mtime
= *mtime
;
504 if (timespec_compare(atime
, &inode
->i_atime
) > 0) {
505 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
506 inode
->i_atime
.tv_sec
,
507 inode
->i_atime
.tv_nsec
,
508 atime
->tv_sec
, atime
->tv_nsec
);
509 inode
->i_atime
= *atime
;
511 } else if (issued
& CEPH_CAP_FILE_EXCL
) {
512 /* we did a utimes(); ignore mds values */
517 /* we have no write|excl caps; whatever the MDS says is true */
518 if (ceph_seq_cmp(time_warp_seq
, ci
->i_time_warp_seq
) >= 0) {
519 inode
->i_ctime
= *ctime
;
520 inode
->i_mtime
= *mtime
;
521 inode
->i_atime
= *atime
;
522 ci
->i_time_warp_seq
= time_warp_seq
;
527 if (warn
) /* time_warp_seq shouldn't go backwards */
528 dout("%p mds time_warp_seq %llu < %u\n",
529 inode
, time_warp_seq
, ci
->i_time_warp_seq
);
533 * Populate an inode based on info from mds. May be called on new or
536 static int fill_inode(struct inode
*inode
,
537 struct ceph_mds_reply_info_in
*iinfo
,
538 struct ceph_mds_reply_dirfrag
*dirinfo
,
539 struct ceph_mds_session
*session
,
540 unsigned long ttl_from
, int cap_fmode
,
541 struct ceph_cap_reservation
*caps_reservation
)
543 struct ceph_mds_reply_inode
*info
= iinfo
->in
;
544 struct ceph_inode_info
*ci
= ceph_inode(inode
);
546 int issued
, implemented
;
547 struct timespec mtime
, atime
, ctime
;
549 struct ceph_buffer
*xattr_blob
= NULL
;
553 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
554 inode
, ceph_vinop(inode
), le64_to_cpu(info
->version
),
558 * prealloc xattr data, if it looks like we'll need it. only
559 * if len > 4 (meaning there are actually xattrs; the first 4
560 * bytes are the xattr count).
562 if (iinfo
->xattr_len
> 4) {
563 xattr_blob
= ceph_buffer_new(iinfo
->xattr_len
, GFP_NOFS
);
565 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
569 spin_lock(&inode
->i_lock
);
572 * provided version will be odd if inode value is projected,
573 * even if stable. skip the update if we have newer stable
574 * info (ours>=theirs, e.g. due to racing mds replies), unless
575 * we are getting projected (unstable) info (in which case the
576 * version is odd, and we want ours>theirs).
582 if (le64_to_cpu(info
->version
) > 0 &&
583 (ci
->i_version
& ~1) >= le64_to_cpu(info
->version
))
586 issued
= __ceph_caps_issued(ci
, &implemented
);
587 issued
|= implemented
| __ceph_caps_dirty(ci
);
590 ci
->i_version
= le64_to_cpu(info
->version
);
592 inode
->i_rdev
= le32_to_cpu(info
->rdev
);
594 if ((issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
595 inode
->i_mode
= le32_to_cpu(info
->mode
);
596 inode
->i_uid
= le32_to_cpu(info
->uid
);
597 inode
->i_gid
= le32_to_cpu(info
->gid
);
598 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
599 inode
->i_uid
, inode
->i_gid
);
602 if ((issued
& CEPH_CAP_LINK_EXCL
) == 0)
603 inode
->i_nlink
= le32_to_cpu(info
->nlink
);
605 /* be careful with mtime, atime, size */
606 ceph_decode_timespec(&atime
, &info
->atime
);
607 ceph_decode_timespec(&mtime
, &info
->mtime
);
608 ceph_decode_timespec(&ctime
, &info
->ctime
);
609 queue_trunc
= ceph_fill_file_size(inode
, issued
,
610 le32_to_cpu(info
->truncate_seq
),
611 le64_to_cpu(info
->truncate_size
),
612 le64_to_cpu(info
->size
));
613 ceph_fill_file_time(inode
, issued
,
614 le32_to_cpu(info
->time_warp_seq
),
615 &ctime
, &mtime
, &atime
);
617 /* only update max_size on auth cap */
618 if ((info
->cap
.flags
& CEPH_CAP_FLAG_AUTH
) &&
619 ci
->i_max_size
!= le64_to_cpu(info
->max_size
)) {
620 dout("max_size %lld -> %llu\n", ci
->i_max_size
,
621 le64_to_cpu(info
->max_size
));
622 ci
->i_max_size
= le64_to_cpu(info
->max_size
);
625 ci
->i_layout
= info
->layout
;
626 inode
->i_blkbits
= fls(le32_to_cpu(info
->layout
.fl_stripe_unit
)) - 1;
629 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
630 if ((issued
& CEPH_CAP_XATTR_EXCL
) == 0 &&
631 le64_to_cpu(info
->xattr_version
) > ci
->i_xattrs
.version
) {
632 if (ci
->i_xattrs
.blob
)
633 ceph_buffer_put(ci
->i_xattrs
.blob
);
634 ci
->i_xattrs
.blob
= xattr_blob
;
636 memcpy(ci
->i_xattrs
.blob
->vec
.iov_base
,
637 iinfo
->xattr_data
, iinfo
->xattr_len
);
638 ci
->i_xattrs
.version
= le64_to_cpu(info
->xattr_version
);
642 inode
->i_mapping
->a_ops
= &ceph_aops
;
643 inode
->i_mapping
->backing_dev_info
=
644 &ceph_sb_to_client(inode
->i_sb
)->backing_dev_info
;
646 switch (inode
->i_mode
& S_IFMT
) {
651 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
652 inode
->i_op
= &ceph_file_iops
;
655 inode
->i_op
= &ceph_file_iops
;
656 inode
->i_fop
= &ceph_file_fops
;
659 inode
->i_op
= &ceph_symlink_iops
;
660 if (!ci
->i_symlink
) {
661 int symlen
= iinfo
->symlink_len
;
664 BUG_ON(symlen
!= inode
->i_size
);
665 spin_unlock(&inode
->i_lock
);
668 sym
= kmalloc(symlen
+1, GFP_NOFS
);
671 memcpy(sym
, iinfo
->symlink
, symlen
);
674 spin_lock(&inode
->i_lock
);
678 kfree(sym
); /* lost a race */
682 inode
->i_op
= &ceph_dir_iops
;
683 inode
->i_fop
= &ceph_dir_fops
;
685 ci
->i_files
= le64_to_cpu(info
->files
);
686 ci
->i_subdirs
= le64_to_cpu(info
->subdirs
);
687 ci
->i_rbytes
= le64_to_cpu(info
->rbytes
);
688 ci
->i_rfiles
= le64_to_cpu(info
->rfiles
);
689 ci
->i_rsubdirs
= le64_to_cpu(info
->rsubdirs
);
690 ceph_decode_timespec(&ci
->i_rctime
, &info
->rctime
);
692 /* set dir completion flag? */
693 if (ci
->i_files
== 0 && ci
->i_subdirs
== 0 &&
694 ceph_snap(inode
) == CEPH_NOSNAP
&&
695 (le32_to_cpu(info
->cap
.caps
) & CEPH_CAP_FILE_SHARED
) &&
696 (issued
& CEPH_CAP_FILE_EXCL
) == 0 &&
697 (ci
->i_ceph_flags
& CEPH_I_COMPLETE
) == 0) {
698 dout(" marking %p complete (empty)\n", inode
);
699 ci
->i_ceph_flags
|= CEPH_I_COMPLETE
;
700 ci
->i_max_offset
= 2;
703 /* it may be better to set st_size in getattr instead? */
704 if (ceph_test_mount_opt(ceph_sb_to_client(inode
->i_sb
), RBYTES
))
705 inode
->i_size
= ci
->i_rbytes
;
708 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
709 ceph_vinop(inode
), inode
->i_mode
);
713 spin_unlock(&inode
->i_lock
);
715 /* queue truncate if we saw i_size decrease */
717 ceph_queue_vmtruncate(inode
);
719 /* populate frag tree */
720 /* FIXME: move me up, if/when version reflects fragtree changes */
721 nsplits
= le32_to_cpu(info
->fragtree
.nsplits
);
722 mutex_lock(&ci
->i_fragtree_mutex
);
723 for (i
= 0; i
< nsplits
; i
++) {
724 u32 id
= le32_to_cpu(info
->fragtree
.splits
[i
].frag
);
725 struct ceph_inode_frag
*frag
= __get_or_create_frag(ci
, id
);
729 frag
->split_by
= le32_to_cpu(info
->fragtree
.splits
[i
].by
);
730 dout(" frag %x split by %d\n", frag
->frag
, frag
->split_by
);
732 mutex_unlock(&ci
->i_fragtree_mutex
);
734 /* were we issued a capability? */
735 if (info
->cap
.caps
) {
736 if (ceph_snap(inode
) == CEPH_NOSNAP
) {
737 ceph_add_cap(inode
, session
,
738 le64_to_cpu(info
->cap
.cap_id
),
740 le32_to_cpu(info
->cap
.caps
),
741 le32_to_cpu(info
->cap
.wanted
),
742 le32_to_cpu(info
->cap
.seq
),
743 le32_to_cpu(info
->cap
.mseq
),
744 le64_to_cpu(info
->cap
.realm
),
748 spin_lock(&inode
->i_lock
);
749 dout(" %p got snap_caps %s\n", inode
,
750 ceph_cap_string(le32_to_cpu(info
->cap
.caps
)));
751 ci
->i_snap_caps
|= le32_to_cpu(info
->cap
.caps
);
753 __ceph_get_fmode(ci
, cap_fmode
);
754 spin_unlock(&inode
->i_lock
);
756 } else if (cap_fmode
>= 0) {
757 pr_warning("mds issued no caps on %llx.%llx\n",
759 __ceph_get_fmode(ci
, cap_fmode
);
762 /* update delegation info? */
764 ceph_fill_dirfrag(inode
, dirinfo
);
770 ceph_buffer_put(xattr_blob
);
775 * caller should hold session s_mutex.
777 static void update_dentry_lease(struct dentry
*dentry
,
778 struct ceph_mds_reply_lease
*lease
,
779 struct ceph_mds_session
*session
,
780 unsigned long from_time
)
782 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
783 long unsigned duration
= le32_to_cpu(lease
->duration_ms
);
784 long unsigned ttl
= from_time
+ (duration
* HZ
) / 1000;
785 long unsigned half_ttl
= from_time
+ (duration
* HZ
/ 2) / 1000;
788 /* only track leases on regular dentries */
789 if (dentry
->d_op
!= &ceph_dentry_ops
)
792 spin_lock(&dentry
->d_lock
);
793 dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n",
794 dentry
, le16_to_cpu(lease
->mask
), duration
, ttl
);
796 /* make lease_rdcache_gen match directory */
797 dir
= dentry
->d_parent
->d_inode
;
798 di
->lease_shared_gen
= ceph_inode(dir
)->i_shared_gen
;
800 if (lease
->mask
== 0)
803 if (di
->lease_gen
== session
->s_cap_gen
&&
804 time_before(ttl
, dentry
->d_time
))
805 goto out_unlock
; /* we already have a newer lease. */
807 if (di
->lease_session
&& di
->lease_session
!= session
)
810 ceph_dentry_lru_touch(dentry
);
812 if (!di
->lease_session
)
813 di
->lease_session
= ceph_get_mds_session(session
);
814 di
->lease_gen
= session
->s_cap_gen
;
815 di
->lease_seq
= le32_to_cpu(lease
->seq
);
816 di
->lease_renew_after
= half_ttl
;
817 di
->lease_renew_from
= 0;
818 dentry
->d_time
= ttl
;
820 spin_unlock(&dentry
->d_lock
);
825 * Set dentry's directory position based on the current dir's max, and
826 * order it in d_subdirs, so that dcache_readdir behaves.
828 static void ceph_set_dentry_offset(struct dentry
*dn
)
830 struct dentry
*dir
= dn
->d_parent
;
831 struct inode
*inode
= dn
->d_parent
->d_inode
;
832 struct ceph_dentry_info
*di
;
836 di
= ceph_dentry(dn
);
838 spin_lock(&inode
->i_lock
);
839 if ((ceph_inode(inode
)->i_ceph_flags
& CEPH_I_COMPLETE
) == 0) {
840 spin_unlock(&inode
->i_lock
);
843 di
->offset
= ceph_inode(inode
)->i_max_offset
++;
844 spin_unlock(&inode
->i_lock
);
846 spin_lock(&dcache_lock
);
847 spin_lock(&dn
->d_lock
);
848 list_move(&dn
->d_u
.d_child
, &dir
->d_subdirs
);
849 dout("set_dentry_offset %p %lld (%p %p)\n", dn
, di
->offset
,
850 dn
->d_u
.d_child
.prev
, dn
->d_u
.d_child
.next
);
851 spin_unlock(&dn
->d_lock
);
852 spin_unlock(&dcache_lock
);
856 * splice a dentry to an inode.
857 * caller must hold directory i_mutex for this to be safe.
859 * we will only rehash the resulting dentry if @prehash is
860 * true; @prehash will be set to false (for the benefit of
861 * the caller) if we fail.
863 static struct dentry
*splice_dentry(struct dentry
*dn
, struct inode
*in
,
864 bool *prehash
, bool set_offset
)
866 struct dentry
*realdn
;
870 /* dn must be unhashed */
873 realdn
= d_materialise_unique(dn
, in
);
874 if (IS_ERR(realdn
)) {
875 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
876 PTR_ERR(realdn
), dn
, in
, ceph_vinop(in
));
878 *prehash
= false; /* don't rehash on error */
879 dn
= realdn
; /* note realdn contains the error */
882 dout("dn %p (%d) spliced with %p (%d) "
883 "inode %p ino %llx.%llx\n",
884 dn
, atomic_read(&dn
->d_count
),
885 realdn
, atomic_read(&realdn
->d_count
),
886 realdn
->d_inode
, ceph_vinop(realdn
->d_inode
));
890 BUG_ON(!ceph_dentry(dn
));
891 dout("dn %p attached to %p ino %llx.%llx\n",
892 dn
, dn
->d_inode
, ceph_vinop(dn
->d_inode
));
894 if ((!prehash
|| *prehash
) && d_unhashed(dn
))
897 ceph_set_dentry_offset(dn
);
903 * Incorporate results into the local cache. This is either just
904 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
907 * A reply may contain
908 * a directory inode along with a dentry.
909 * and/or a target inode
911 * Called with snap_rwsem (read).
913 int ceph_fill_trace(struct super_block
*sb
, struct ceph_mds_request
*req
,
914 struct ceph_mds_session
*session
)
916 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
917 struct inode
*in
= NULL
;
918 struct ceph_mds_reply_inode
*ininfo
;
919 struct ceph_vino vino
;
920 struct ceph_fs_client
*fsc
= ceph_sb_to_client(sb
);
924 dout("fill_trace %p is_dentry %d is_target %d\n", req
,
925 rinfo
->head
->is_dentry
, rinfo
->head
->is_target
);
931 * If we resend completed ops to a recovering mds, we get no
932 * trace. Since that is very rare, pretend this is the case
933 * to ensure the 'no trace' handlers in the callers behave.
935 * Fill in inodes unconditionally to avoid breaking cap
938 if (rinfo
->head
->op
& CEPH_MDS_OP_WRITE
) {
939 pr_info("fill_trace faking empty trace on %lld %s\n",
940 req
->r_tid
, ceph_mds_op_name(rinfo
->head
->op
));
941 if (rinfo
->head
->is_dentry
) {
942 rinfo
->head
->is_dentry
= 0;
943 err
= fill_inode(req
->r_locked_dir
,
944 &rinfo
->diri
, rinfo
->dirfrag
,
945 session
, req
->r_request_started
, -1);
947 if (rinfo
->head
->is_target
) {
948 rinfo
->head
->is_target
= 0;
949 ininfo
= rinfo
->targeti
.in
;
950 vino
.ino
= le64_to_cpu(ininfo
->ino
);
951 vino
.snap
= le64_to_cpu(ininfo
->snapid
);
952 in
= ceph_get_inode(sb
, vino
);
953 err
= fill_inode(in
, &rinfo
->targeti
, NULL
,
954 session
, req
->r_request_started
,
961 if (!rinfo
->head
->is_target
&& !rinfo
->head
->is_dentry
) {
962 dout("fill_trace reply is empty!\n");
963 if (rinfo
->head
->result
== 0 && req
->r_locked_dir
)
964 ceph_invalidate_dir_request(req
);
968 if (rinfo
->head
->is_dentry
) {
969 struct inode
*dir
= req
->r_locked_dir
;
971 err
= fill_inode(dir
, &rinfo
->diri
, rinfo
->dirfrag
,
972 session
, req
->r_request_started
, -1,
973 &req
->r_caps_reservation
);
979 * ignore null lease/binding on snapdir ENOENT, or else we
980 * will have trouble splicing in the virtual snapdir later
982 if (rinfo
->head
->is_dentry
&& !req
->r_aborted
&&
983 (rinfo
->head
->is_target
|| strncmp(req
->r_dentry
->d_name
.name
,
984 fsc
->mount_options
->snapdir_name
,
985 req
->r_dentry
->d_name
.len
))) {
987 * lookup link rename : null -> possibly existing inode
988 * mknod symlink mkdir : null -> new inode
989 * unlink : linked -> null
991 struct inode
*dir
= req
->r_locked_dir
;
992 struct dentry
*dn
= req
->r_dentry
;
993 bool have_dir_cap
, have_lease
;
997 BUG_ON(dn
->d_parent
->d_inode
!= dir
);
998 BUG_ON(ceph_ino(dir
) !=
999 le64_to_cpu(rinfo
->diri
.in
->ino
));
1000 BUG_ON(ceph_snap(dir
) !=
1001 le64_to_cpu(rinfo
->diri
.in
->snapid
));
1003 /* do we have a lease on the whole dir? */
1005 (le32_to_cpu(rinfo
->diri
.in
->cap
.caps
) &
1006 CEPH_CAP_FILE_SHARED
);
1008 /* do we have a dn lease? */
1009 have_lease
= have_dir_cap
||
1010 (le16_to_cpu(rinfo
->dlease
->mask
) &
1014 dout("fill_trace no dentry lease or dir cap\n");
1017 if (req
->r_old_dentry
&& req
->r_op
== CEPH_MDS_OP_RENAME
) {
1018 dout(" src %p '%.*s' dst %p '%.*s'\n",
1020 req
->r_old_dentry
->d_name
.len
,
1021 req
->r_old_dentry
->d_name
.name
,
1022 dn
, dn
->d_name
.len
, dn
->d_name
.name
);
1023 dout("fill_trace doing d_move %p -> %p\n",
1024 req
->r_old_dentry
, dn
);
1026 /* d_move screws up d_subdirs order */
1027 ceph_i_clear(dir
, CEPH_I_COMPLETE
);
1029 d_move(req
->r_old_dentry
, dn
);
1030 dout(" src %p '%.*s' dst %p '%.*s'\n",
1032 req
->r_old_dentry
->d_name
.len
,
1033 req
->r_old_dentry
->d_name
.name
,
1034 dn
, dn
->d_name
.len
, dn
->d_name
.name
);
1036 /* ensure target dentry is invalidated, despite
1037 rehashing bug in vfs_rename_dir */
1038 ceph_invalidate_dentry_lease(dn
);
1040 /* take overwritten dentry's readdir offset */
1041 dout("dn %p gets %p offset %lld (old offset %lld)\n",
1042 req
->r_old_dentry
, dn
, ceph_dentry(dn
)->offset
,
1043 ceph_dentry(req
->r_old_dentry
)->offset
);
1044 ceph_dentry(req
->r_old_dentry
)->offset
=
1045 ceph_dentry(dn
)->offset
;
1047 dn
= req
->r_old_dentry
; /* use old_dentry */
1052 if (!rinfo
->head
->is_target
) {
1053 dout("fill_trace null dentry\n");
1055 dout("d_delete %p\n", dn
);
1058 dout("d_instantiate %p NULL\n", dn
);
1059 d_instantiate(dn
, NULL
);
1060 if (have_lease
&& d_unhashed(dn
))
1062 update_dentry_lease(dn
, rinfo
->dlease
,
1064 req
->r_request_started
);
1069 /* attach proper inode */
1070 ininfo
= rinfo
->targeti
.in
;
1071 vino
.ino
= le64_to_cpu(ininfo
->ino
);
1072 vino
.snap
= le64_to_cpu(ininfo
->snapid
);
1075 in
= ceph_get_inode(sb
, vino
);
1077 pr_err("fill_trace bad get_inode "
1078 "%llx.%llx\n", vino
.ino
, vino
.snap
);
1083 dn
= splice_dentry(dn
, in
, &have_lease
, true);
1088 req
->r_dentry
= dn
; /* may have spliced */
1090 } else if (ceph_ino(in
) == vino
.ino
&&
1091 ceph_snap(in
) == vino
.snap
) {
1094 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1095 dn
, in
, ceph_ino(in
), ceph_snap(in
),
1096 vino
.ino
, vino
.snap
);
1102 update_dentry_lease(dn
, rinfo
->dlease
, session
,
1103 req
->r_request_started
);
1104 dout(" final dn %p\n", dn
);
1106 } else if (req
->r_op
== CEPH_MDS_OP_LOOKUPSNAP
||
1107 req
->r_op
== CEPH_MDS_OP_MKSNAP
) {
1108 struct dentry
*dn
= req
->r_dentry
;
1110 /* fill out a snapdir LOOKUPSNAP dentry */
1112 BUG_ON(!req
->r_locked_dir
);
1113 BUG_ON(ceph_snap(req
->r_locked_dir
) != CEPH_SNAPDIR
);
1114 ininfo
= rinfo
->targeti
.in
;
1115 vino
.ino
= le64_to_cpu(ininfo
->ino
);
1116 vino
.snap
= le64_to_cpu(ininfo
->snapid
);
1117 in
= ceph_get_inode(sb
, vino
);
1119 pr_err("fill_inode get_inode badness %llx.%llx\n",
1120 vino
.ino
, vino
.snap
);
1125 dout(" linking snapped dir %p to dn %p\n", in
, dn
);
1126 dn
= splice_dentry(dn
, in
, NULL
, true);
1131 req
->r_dentry
= dn
; /* may have spliced */
1133 rinfo
->head
->is_dentry
= 1; /* fool notrace handlers */
1136 if (rinfo
->head
->is_target
) {
1137 vino
.ino
= le64_to_cpu(rinfo
->targeti
.in
->ino
);
1138 vino
.snap
= le64_to_cpu(rinfo
->targeti
.in
->snapid
);
1140 if (in
== NULL
|| ceph_ino(in
) != vino
.ino
||
1141 ceph_snap(in
) != vino
.snap
) {
1142 in
= ceph_get_inode(sb
, vino
);
1148 req
->r_target_inode
= in
;
1150 err
= fill_inode(in
,
1151 &rinfo
->targeti
, NULL
,
1152 session
, req
->r_request_started
,
1153 (le32_to_cpu(rinfo
->head
->result
) == 0) ?
1155 &req
->r_caps_reservation
);
1157 pr_err("fill_inode badness %p %llx.%llx\n",
1158 in
, ceph_vinop(in
));
1164 dout("fill_trace done err=%d\n", err
);
1169 * Prepopulate our cache with readdir results, leases, etc.
1171 int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
1172 struct ceph_mds_session
*session
)
1174 struct dentry
*parent
= req
->r_dentry
;
1175 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1180 struct inode
*snapdir
= NULL
;
1181 struct ceph_mds_request_head
*rhead
= req
->r_request
->front
.iov_base
;
1182 u64 frag
= le32_to_cpu(rhead
->args
.readdir
.frag
);
1183 struct ceph_dentry_info
*di
;
1185 if (le32_to_cpu(rinfo
->head
->op
) == CEPH_MDS_OP_LSSNAP
) {
1186 snapdir
= ceph_get_snapdir(parent
->d_inode
);
1187 parent
= d_find_alias(snapdir
);
1188 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1189 rinfo
->dir_nr
, parent
);
1191 dout("readdir_prepopulate %d items under dn %p\n",
1192 rinfo
->dir_nr
, parent
);
1194 ceph_fill_dirfrag(parent
->d_inode
, rinfo
->dir_dir
);
1197 for (i
= 0; i
< rinfo
->dir_nr
; i
++) {
1198 struct ceph_vino vino
;
1200 dname
.name
= rinfo
->dir_dname
[i
];
1201 dname
.len
= rinfo
->dir_dname_len
[i
];
1202 dname
.hash
= full_name_hash(dname
.name
, dname
.len
);
1204 vino
.ino
= le64_to_cpu(rinfo
->dir_in
[i
].in
->ino
);
1205 vino
.snap
= le64_to_cpu(rinfo
->dir_in
[i
].in
->snapid
);
1208 dn
= d_lookup(parent
, &dname
);
1209 dout("d_lookup on parent=%p name=%.*s got %p\n",
1210 parent
, dname
.len
, dname
.name
, dn
);
1213 dn
= d_alloc(parent
, &dname
);
1214 dout("d_alloc %p '%.*s' = %p\n", parent
,
1215 dname
.len
, dname
.name
, dn
);
1217 dout("d_alloc badness\n");
1221 err
= ceph_init_dentry(dn
);
1226 } else if (dn
->d_inode
&&
1227 (ceph_ino(dn
->d_inode
) != vino
.ino
||
1228 ceph_snap(dn
->d_inode
) != vino
.snap
)) {
1229 dout(" dn %p points to wrong inode %p\n",
1235 /* reorder parent's d_subdirs */
1236 spin_lock(&dcache_lock
);
1237 spin_lock(&dn
->d_lock
);
1238 list_move(&dn
->d_u
.d_child
, &parent
->d_subdirs
);
1239 spin_unlock(&dn
->d_lock
);
1240 spin_unlock(&dcache_lock
);
1244 di
->offset
= ceph_make_fpos(frag
, i
+ req
->r_readdir_offset
);
1250 in
= ceph_get_inode(parent
->d_sb
, vino
);
1252 dout("new_inode badness\n");
1258 dn
= splice_dentry(dn
, in
, NULL
, false);
1263 if (fill_inode(in
, &rinfo
->dir_in
[i
], NULL
, session
,
1264 req
->r_request_started
, -1,
1265 &req
->r_caps_reservation
) < 0) {
1266 pr_err("fill_inode badness on %p\n", in
);
1270 update_dentry_lease(dn
, rinfo
->dir_dlease
[i
],
1272 req
->r_request_started
);
1277 req
->r_did_prepopulate
= true;
1284 dout("readdir_prepopulate done\n");
1288 int ceph_inode_set_size(struct inode
*inode
, loff_t size
)
1290 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1293 spin_lock(&inode
->i_lock
);
1294 dout("set_size %p %llu -> %llu\n", inode
, inode
->i_size
, size
);
1295 inode
->i_size
= size
;
1296 inode
->i_blocks
= (size
+ (1 << 9) - 1) >> 9;
1298 /* tell the MDS if we are approaching max_size */
1299 if ((size
<< 1) >= ci
->i_max_size
&&
1300 (ci
->i_reported_size
<< 1) < ci
->i_max_size
)
1303 spin_unlock(&inode
->i_lock
);
1308 * Write back inode data in a worker thread. (This can't be done
1309 * in the message handler context.)
1311 void ceph_queue_writeback(struct inode
*inode
)
1313 if (queue_work(ceph_inode_to_client(inode
)->wb_wq
,
1314 &ceph_inode(inode
)->i_wb_work
)) {
1315 dout("ceph_queue_writeback %p\n", inode
);
1318 dout("ceph_queue_writeback %p failed\n", inode
);
1322 static void ceph_writeback_work(struct work_struct
*work
)
1324 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1326 struct inode
*inode
= &ci
->vfs_inode
;
1328 dout("writeback %p\n", inode
);
1329 filemap_fdatawrite(&inode
->i_data
);
1334 * queue an async invalidation
1336 void ceph_queue_invalidate(struct inode
*inode
)
1338 if (queue_work(ceph_inode_to_client(inode
)->pg_inv_wq
,
1339 &ceph_inode(inode
)->i_pg_inv_work
)) {
1340 dout("ceph_queue_invalidate %p\n", inode
);
1343 dout("ceph_queue_invalidate %p failed\n", inode
);
1348 * invalidate any pages that are not dirty or under writeback. this
1349 * includes pages that are clean and mapped.
1351 static void ceph_invalidate_nondirty_pages(struct address_space
*mapping
)
1353 struct pagevec pvec
;
1357 pagevec_init(&pvec
, 0);
1358 while (pagevec_lookup(&pvec
, mapping
, next
, PAGEVEC_SIZE
)) {
1359 for (i
= 0; i
< pagevec_count(&pvec
); i
++) {
1360 struct page
*page
= pvec
.pages
[i
];
1363 (PageDirty(page
) || PageWriteback(page
));
1366 skip_page
= !trylock_page(page
);
1369 * We really shouldn't be looking at the ->index of an
1370 * unlocked page. But we're not allowed to lock these
1371 * pages. So we rely upon nobody altering the ->index
1372 * of this (pinned-by-us) page.
1374 index
= page
->index
;
1382 generic_error_remove_page(mapping
, page
);
1385 pagevec_release(&pvec
);
1391 * Invalidate inode pages in a worker thread. (This can't be done
1392 * in the message handler context.)
1394 static void ceph_invalidate_work(struct work_struct
*work
)
1396 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1398 struct inode
*inode
= &ci
->vfs_inode
;
1402 spin_lock(&inode
->i_lock
);
1403 dout("invalidate_pages %p gen %d revoking %d\n", inode
,
1404 ci
->i_rdcache_gen
, ci
->i_rdcache_revoking
);
1405 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
1407 spin_unlock(&inode
->i_lock
);
1410 orig_gen
= ci
->i_rdcache_gen
;
1411 spin_unlock(&inode
->i_lock
);
1413 ceph_invalidate_nondirty_pages(inode
->i_mapping
);
1415 spin_lock(&inode
->i_lock
);
1416 if (orig_gen
== ci
->i_rdcache_gen
&&
1417 orig_gen
== ci
->i_rdcache_revoking
) {
1418 dout("invalidate_pages %p gen %d successful\n", inode
,
1420 ci
->i_rdcache_revoking
--;
1423 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1424 inode
, orig_gen
, ci
->i_rdcache_gen
,
1425 ci
->i_rdcache_revoking
);
1427 spin_unlock(&inode
->i_lock
);
1430 ceph_check_caps(ci
, 0, NULL
);
1437 * called by trunc_wq; take i_mutex ourselves
1439 * We also truncate in a separate thread as well.
1441 static void ceph_vmtruncate_work(struct work_struct
*work
)
1443 struct ceph_inode_info
*ci
= container_of(work
, struct ceph_inode_info
,
1445 struct inode
*inode
= &ci
->vfs_inode
;
1447 dout("vmtruncate_work %p\n", inode
);
1448 mutex_lock(&inode
->i_mutex
);
1449 __ceph_do_pending_vmtruncate(inode
);
1450 mutex_unlock(&inode
->i_mutex
);
1455 * Queue an async vmtruncate. If we fail to queue work, we will handle
1456 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1458 void ceph_queue_vmtruncate(struct inode
*inode
)
1460 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1462 if (queue_work(ceph_sb_to_client(inode
->i_sb
)->trunc_wq
,
1463 &ci
->i_vmtruncate_work
)) {
1464 dout("ceph_queue_vmtruncate %p\n", inode
);
1467 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1468 inode
, ci
->i_truncate_pending
);
1473 * called with i_mutex held.
1475 * Make sure any pending truncation is applied before doing anything
1476 * that may depend on it.
1478 void __ceph_do_pending_vmtruncate(struct inode
*inode
)
1480 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1482 int wrbuffer_refs
, wake
= 0;
1485 spin_lock(&inode
->i_lock
);
1486 if (ci
->i_truncate_pending
== 0) {
1487 dout("__do_pending_vmtruncate %p none pending\n", inode
);
1488 spin_unlock(&inode
->i_lock
);
1493 * make sure any dirty snapped pages are flushed before we
1494 * possibly truncate them.. so write AND block!
1496 if (ci
->i_wrbuffer_ref_head
< ci
->i_wrbuffer_ref
) {
1497 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1499 spin_unlock(&inode
->i_lock
);
1500 filemap_write_and_wait_range(&inode
->i_data
, 0,
1501 inode
->i_sb
->s_maxbytes
);
1505 to
= ci
->i_truncate_size
;
1506 wrbuffer_refs
= ci
->i_wrbuffer_ref
;
1507 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode
,
1508 ci
->i_truncate_pending
, to
);
1509 spin_unlock(&inode
->i_lock
);
1511 truncate_inode_pages(inode
->i_mapping
, to
);
1513 spin_lock(&inode
->i_lock
);
1514 ci
->i_truncate_pending
--;
1515 if (ci
->i_truncate_pending
== 0)
1517 spin_unlock(&inode
->i_lock
);
1519 if (wrbuffer_refs
== 0)
1520 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
1522 wake_up_all(&ci
->i_cap_wq
);
1529 static void *ceph_sym_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
1531 struct ceph_inode_info
*ci
= ceph_inode(dentry
->d_inode
);
1532 nd_set_link(nd
, ci
->i_symlink
);
1536 static const struct inode_operations ceph_symlink_iops
= {
1537 .readlink
= generic_readlink
,
1538 .follow_link
= ceph_sym_follow_link
,
1544 int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1546 struct inode
*inode
= dentry
->d_inode
;
1547 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1548 struct inode
*parent_inode
= dentry
->d_parent
->d_inode
;
1549 const unsigned int ia_valid
= attr
->ia_valid
;
1550 struct ceph_mds_request
*req
;
1551 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(dentry
->d_sb
)->mdsc
;
1553 int release
= 0, dirtied
= 0;
1557 if (ceph_snap(inode
) != CEPH_NOSNAP
)
1560 __ceph_do_pending_vmtruncate(inode
);
1562 err
= inode_change_ok(inode
, attr
);
1566 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_SETATTR
,
1569 return PTR_ERR(req
);
1571 spin_lock(&inode
->i_lock
);
1572 issued
= __ceph_caps_issued(ci
, NULL
);
1573 dout("setattr %p issued %s\n", inode
, ceph_cap_string(issued
));
1575 if (ia_valid
& ATTR_UID
) {
1576 dout("setattr %p uid %d -> %d\n", inode
,
1577 inode
->i_uid
, attr
->ia_uid
);
1578 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1579 inode
->i_uid
= attr
->ia_uid
;
1580 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1581 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1582 attr
->ia_uid
!= inode
->i_uid
) {
1583 req
->r_args
.setattr
.uid
= cpu_to_le32(attr
->ia_uid
);
1584 mask
|= CEPH_SETATTR_UID
;
1585 release
|= CEPH_CAP_AUTH_SHARED
;
1588 if (ia_valid
& ATTR_GID
) {
1589 dout("setattr %p gid %d -> %d\n", inode
,
1590 inode
->i_gid
, attr
->ia_gid
);
1591 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1592 inode
->i_gid
= attr
->ia_gid
;
1593 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1594 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1595 attr
->ia_gid
!= inode
->i_gid
) {
1596 req
->r_args
.setattr
.gid
= cpu_to_le32(attr
->ia_gid
);
1597 mask
|= CEPH_SETATTR_GID
;
1598 release
|= CEPH_CAP_AUTH_SHARED
;
1601 if (ia_valid
& ATTR_MODE
) {
1602 dout("setattr %p mode 0%o -> 0%o\n", inode
, inode
->i_mode
,
1604 if (issued
& CEPH_CAP_AUTH_EXCL
) {
1605 inode
->i_mode
= attr
->ia_mode
;
1606 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1607 } else if ((issued
& CEPH_CAP_AUTH_SHARED
) == 0 ||
1608 attr
->ia_mode
!= inode
->i_mode
) {
1609 req
->r_args
.setattr
.mode
= cpu_to_le32(attr
->ia_mode
);
1610 mask
|= CEPH_SETATTR_MODE
;
1611 release
|= CEPH_CAP_AUTH_SHARED
;
1615 if (ia_valid
& ATTR_ATIME
) {
1616 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode
,
1617 inode
->i_atime
.tv_sec
, inode
->i_atime
.tv_nsec
,
1618 attr
->ia_atime
.tv_sec
, attr
->ia_atime
.tv_nsec
);
1619 if (issued
& CEPH_CAP_FILE_EXCL
) {
1620 ci
->i_time_warp_seq
++;
1621 inode
->i_atime
= attr
->ia_atime
;
1622 dirtied
|= CEPH_CAP_FILE_EXCL
;
1623 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
1624 timespec_compare(&inode
->i_atime
,
1625 &attr
->ia_atime
) < 0) {
1626 inode
->i_atime
= attr
->ia_atime
;
1627 dirtied
|= CEPH_CAP_FILE_WR
;
1628 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
1629 !timespec_equal(&inode
->i_atime
, &attr
->ia_atime
)) {
1630 ceph_encode_timespec(&req
->r_args
.setattr
.atime
,
1632 mask
|= CEPH_SETATTR_ATIME
;
1633 release
|= CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_RD
|
1637 if (ia_valid
& ATTR_MTIME
) {
1638 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode
,
1639 inode
->i_mtime
.tv_sec
, inode
->i_mtime
.tv_nsec
,
1640 attr
->ia_mtime
.tv_sec
, attr
->ia_mtime
.tv_nsec
);
1641 if (issued
& CEPH_CAP_FILE_EXCL
) {
1642 ci
->i_time_warp_seq
++;
1643 inode
->i_mtime
= attr
->ia_mtime
;
1644 dirtied
|= CEPH_CAP_FILE_EXCL
;
1645 } else if ((issued
& CEPH_CAP_FILE_WR
) &&
1646 timespec_compare(&inode
->i_mtime
,
1647 &attr
->ia_mtime
) < 0) {
1648 inode
->i_mtime
= attr
->ia_mtime
;
1649 dirtied
|= CEPH_CAP_FILE_WR
;
1650 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
1651 !timespec_equal(&inode
->i_mtime
, &attr
->ia_mtime
)) {
1652 ceph_encode_timespec(&req
->r_args
.setattr
.mtime
,
1654 mask
|= CEPH_SETATTR_MTIME
;
1655 release
|= CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_RD
|
1659 if (ia_valid
& ATTR_SIZE
) {
1660 dout("setattr %p size %lld -> %lld\n", inode
,
1661 inode
->i_size
, attr
->ia_size
);
1662 if (attr
->ia_size
> inode
->i_sb
->s_maxbytes
) {
1666 if ((issued
& CEPH_CAP_FILE_EXCL
) &&
1667 attr
->ia_size
> inode
->i_size
) {
1668 inode
->i_size
= attr
->ia_size
;
1670 (attr
->ia_size
+ (1 << 9) - 1) >> 9;
1671 inode
->i_ctime
= attr
->ia_ctime
;
1672 ci
->i_reported_size
= attr
->ia_size
;
1673 dirtied
|= CEPH_CAP_FILE_EXCL
;
1674 } else if ((issued
& CEPH_CAP_FILE_SHARED
) == 0 ||
1675 attr
->ia_size
!= inode
->i_size
) {
1676 req
->r_args
.setattr
.size
= cpu_to_le64(attr
->ia_size
);
1677 req
->r_args
.setattr
.old_size
=
1678 cpu_to_le64(inode
->i_size
);
1679 mask
|= CEPH_SETATTR_SIZE
;
1680 release
|= CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_RD
|
1685 /* these do nothing */
1686 if (ia_valid
& ATTR_CTIME
) {
1687 bool only
= (ia_valid
& (ATTR_SIZE
|ATTR_MTIME
|ATTR_ATIME
|
1688 ATTR_MODE
|ATTR_UID
|ATTR_GID
)) == 0;
1689 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode
,
1690 inode
->i_ctime
.tv_sec
, inode
->i_ctime
.tv_nsec
,
1691 attr
->ia_ctime
.tv_sec
, attr
->ia_ctime
.tv_nsec
,
1692 only
? "ctime only" : "ignored");
1693 inode
->i_ctime
= attr
->ia_ctime
;
1696 * if kernel wants to dirty ctime but nothing else,
1697 * we need to choose a cap to dirty under, or do
1698 * a almost-no-op setattr
1700 if (issued
& CEPH_CAP_AUTH_EXCL
)
1701 dirtied
|= CEPH_CAP_AUTH_EXCL
;
1702 else if (issued
& CEPH_CAP_FILE_EXCL
)
1703 dirtied
|= CEPH_CAP_FILE_EXCL
;
1704 else if (issued
& CEPH_CAP_XATTR_EXCL
)
1705 dirtied
|= CEPH_CAP_XATTR_EXCL
;
1707 mask
|= CEPH_SETATTR_CTIME
;
1710 if (ia_valid
& ATTR_FILE
)
1711 dout("setattr %p ATTR_FILE ... hrm!\n", inode
);
1714 __ceph_mark_dirty_caps(ci
, dirtied
);
1715 inode
->i_ctime
= CURRENT_TIME
;
1719 spin_unlock(&inode
->i_lock
);
1722 req
->r_inode
= igrab(inode
);
1723 req
->r_inode_drop
= release
;
1724 req
->r_args
.setattr
.mask
= cpu_to_le32(mask
);
1725 req
->r_num_caps
= 1;
1726 err
= ceph_mdsc_do_request(mdsc
, parent_inode
, req
);
1728 dout("setattr %p result=%d (%s locally, %d remote)\n", inode
, err
,
1729 ceph_cap_string(dirtied
), mask
);
1731 ceph_mdsc_put_request(req
);
1732 __ceph_do_pending_vmtruncate(inode
);
1735 spin_unlock(&inode
->i_lock
);
1736 ceph_mdsc_put_request(req
);
1741 * Verify that we have a lease on the given mask. If not,
1742 * do a getattr against an mds.
1744 int ceph_do_getattr(struct inode
*inode
, int mask
)
1746 struct ceph_fs_client
*fsc
= ceph_sb_to_client(inode
->i_sb
);
1747 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
1748 struct ceph_mds_request
*req
;
1751 if (ceph_snap(inode
) == CEPH_SNAPDIR
) {
1752 dout("do_getattr inode %p SNAPDIR\n", inode
);
1756 dout("do_getattr inode %p mask %s mode 0%o\n", inode
, ceph_cap_string(mask
), inode
->i_mode
);
1757 if (ceph_caps_issued_mask(ceph_inode(inode
), mask
, 1))
1760 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_GETATTR
, USE_ANY_MDS
);
1762 return PTR_ERR(req
);
1763 req
->r_inode
= igrab(inode
);
1764 req
->r_num_caps
= 1;
1765 req
->r_args
.getattr
.mask
= cpu_to_le32(mask
);
1766 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
1767 ceph_mdsc_put_request(req
);
1768 dout("do_getattr result=%d\n", err
);
1774 * Check inode permissions. We verify we have a valid value for
1775 * the AUTH cap, then call the generic handler.
1777 int ceph_permission(struct inode
*inode
, int mask
)
1779 int err
= ceph_do_getattr(inode
, CEPH_CAP_AUTH_SHARED
);
1782 err
= generic_permission(inode
, mask
, NULL
);
1787 * Get all attributes. Hopefully somedata we'll have a statlite()
1788 * and can limit the fields we require to be accurate.
1790 int ceph_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
1793 struct inode
*inode
= dentry
->d_inode
;
1794 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1797 err
= ceph_do_getattr(inode
, CEPH_STAT_CAP_INODE_ALL
);
1799 generic_fillattr(inode
, stat
);
1800 stat
->ino
= inode
->i_ino
;
1801 if (ceph_snap(inode
) != CEPH_NOSNAP
)
1802 stat
->dev
= ceph_snap(inode
);
1805 if (S_ISDIR(inode
->i_mode
)) {
1806 stat
->size
= ci
->i_rbytes
;
1808 stat
->blksize
= 65536;