1 #include <linux/ceph/ceph_debug.h>
3 #include <linux/module.h>
4 #include <linux/sched.h>
5 #include <linux/slab.h>
6 #include <linux/file.h>
7 #include <linux/mount.h>
8 #include <linux/namei.h>
9 #include <linux/writeback.h>
10 #include <linux/falloc.h>
13 #include "mds_client.h"
17 * Ceph file operations
19 * Implement basic open/close functionality, and implement
22 * We implement three modes of file I/O:
23 * - buffered uses the generic_file_aio_{read,write} helpers
25 * - synchronous is used when there is multi-client read/write
26 * sharing, avoids the page cache, and synchronously waits for an
29 * - direct io takes the variant of the sync path that references
30 * user pages directly.
32 * fsync() flushes and waits on dirty pages, but just queues metadata
33 * for writeback: since the MDS can recover size and mtime there is no
34 * need to wait for MDS acknowledgement.
38 * Calculate the length sum of direct io vectors that can
39 * be combined into one page vector.
41 static size_t dio_get_pagev_size(const struct iov_iter
*it
)
43 const struct iovec
*iov
= it
->iov
;
44 const struct iovec
*iovend
= iov
+ it
->nr_segs
;
47 size
= iov
->iov_len
- it
->iov_offset
;
49 * An iov can be page vectored when both the current tail
50 * and the next base are page aligned.
52 while (PAGE_ALIGNED((iov
->iov_base
+ iov
->iov_len
)) &&
53 (++iov
< iovend
&& PAGE_ALIGNED((iov
->iov_base
)))) {
56 dout("dio_get_pagevlen len = %zu\n", size
);
61 * Allocate a page vector based on (@it, @nbytes).
62 * The return value is the tuple describing a page vector,
63 * that is (@pages, @page_align, @num_pages).
66 dio_get_pages_alloc(const struct iov_iter
*it
, size_t nbytes
,
67 size_t *page_align
, int *num_pages
)
69 struct iov_iter tmp_it
= *it
;
72 int ret
= 0, idx
, npages
;
74 align
= (unsigned long)(it
->iov
->iov_base
+ it
->iov_offset
) &
76 npages
= calc_pages_for(align
, nbytes
);
77 pages
= kmalloc(sizeof(*pages
) * npages
, GFP_KERNEL
);
79 pages
= vmalloc(sizeof(*pages
) * npages
);
81 return ERR_PTR(-ENOMEM
);
84 for (idx
= 0; idx
< npages
; ) {
86 ret
= iov_iter_get_pages(&tmp_it
, pages
+ idx
, nbytes
,
87 npages
- idx
, &start
);
91 iov_iter_advance(&tmp_it
, ret
);
93 idx
+= (ret
+ start
+ PAGE_SIZE
- 1) / PAGE_SIZE
;
99 dout("dio_get_pages_alloc: got %d pages align %zu\n", npages
, align
);
102 ceph_put_page_vector(pages
, idx
, false);
107 * Prepare an open request. Preallocate ceph_cap to avoid an
108 * inopportune ENOMEM later.
110 static struct ceph_mds_request
*
111 prepare_open_request(struct super_block
*sb
, int flags
, int create_mode
)
113 struct ceph_fs_client
*fsc
= ceph_sb_to_client(sb
);
114 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
115 struct ceph_mds_request
*req
;
116 int want_auth
= USE_ANY_MDS
;
117 int op
= (flags
& O_CREAT
) ? CEPH_MDS_OP_CREATE
: CEPH_MDS_OP_OPEN
;
119 if (flags
& (O_WRONLY
|O_RDWR
|O_CREAT
|O_TRUNC
))
120 want_auth
= USE_AUTH_MDS
;
122 req
= ceph_mdsc_create_request(mdsc
, op
, want_auth
);
125 req
->r_fmode
= ceph_flags_to_mode(flags
);
126 req
->r_args
.open
.flags
= cpu_to_le32(flags
);
127 req
->r_args
.open
.mode
= cpu_to_le32(create_mode
);
133 * initialize private struct file data.
134 * if we fail, clean up by dropping fmode reference on the ceph_inode
136 static int ceph_init_file(struct inode
*inode
, struct file
*file
, int fmode
)
138 struct ceph_file_info
*cf
;
140 struct ceph_inode_info
*ci
= ceph_inode(inode
);
141 struct ceph_fs_client
*fsc
= ceph_sb_to_client(inode
->i_sb
);
142 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
144 switch (inode
->i_mode
& S_IFMT
) {
146 /* First file open request creates the cookie, we want to keep
147 * this cookie around for the filetime of the inode as not to
148 * have to worry about fscache register / revoke / operation
151 * Also, if we know the operation is going to invalidate data
152 * (non readonly) just nuke the cache right away.
154 ceph_fscache_register_inode_cookie(mdsc
->fsc
, ci
);
155 if ((fmode
& CEPH_FILE_MODE_WR
))
156 ceph_fscache_invalidate(inode
);
158 dout("init_file %p %p 0%o (regular)\n", inode
, file
,
160 cf
= kmem_cache_zalloc(ceph_file_cachep
, GFP_KERNEL
);
162 ceph_put_fmode(ceph_inode(inode
), fmode
); /* clean up */
167 cf
->readdir_cache_idx
= -1;
168 file
->private_data
= cf
;
169 BUG_ON(inode
->i_fop
->release
!= ceph_release
);
173 dout("init_file %p %p 0%o (symlink)\n", inode
, file
,
175 ceph_put_fmode(ceph_inode(inode
), fmode
); /* clean up */
179 dout("init_file %p %p 0%o (special)\n", inode
, file
,
182 * we need to drop the open ref now, since we don't
183 * have .release set to ceph_release.
185 ceph_put_fmode(ceph_inode(inode
), fmode
); /* clean up */
186 BUG_ON(inode
->i_fop
->release
== ceph_release
);
188 /* call the proper open fop */
189 ret
= inode
->i_fop
->open(inode
, file
);
195 * try renew caps after session gets killed.
197 int ceph_renew_caps(struct inode
*inode
)
199 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
200 struct ceph_inode_info
*ci
= ceph_inode(inode
);
201 struct ceph_mds_request
*req
;
202 int err
, flags
, wanted
;
204 spin_lock(&ci
->i_ceph_lock
);
205 wanted
= __ceph_caps_file_wanted(ci
);
206 if (__ceph_is_any_real_caps(ci
) &&
207 (!(wanted
& CEPH_CAP_ANY_WR
) == 0 || ci
->i_auth_cap
)) {
208 int issued
= __ceph_caps_issued(ci
, NULL
);
209 spin_unlock(&ci
->i_ceph_lock
);
210 dout("renew caps %p want %s issued %s updating mds_wanted\n",
211 inode
, ceph_cap_string(wanted
), ceph_cap_string(issued
));
212 ceph_check_caps(ci
, 0, NULL
);
215 spin_unlock(&ci
->i_ceph_lock
);
218 if ((wanted
& CEPH_CAP_FILE_RD
) && (wanted
& CEPH_CAP_FILE_WR
))
220 else if (wanted
& CEPH_CAP_FILE_RD
)
222 else if (wanted
& CEPH_CAP_FILE_WR
)
225 if (wanted
& CEPH_CAP_FILE_LAZYIO
)
229 req
= prepare_open_request(inode
->i_sb
, flags
, 0);
235 req
->r_inode
= inode
;
240 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
241 ceph_mdsc_put_request(req
);
243 dout("renew caps %p open result=%d\n", inode
, err
);
244 return err
< 0 ? err
: 0;
248 * If we already have the requisite capabilities, we can satisfy
249 * the open request locally (no need to request new caps from the
250 * MDS). We do, however, need to inform the MDS (asynchronously)
251 * if our wanted caps set expands.
253 int ceph_open(struct inode
*inode
, struct file
*file
)
255 struct ceph_inode_info
*ci
= ceph_inode(inode
);
256 struct ceph_fs_client
*fsc
= ceph_sb_to_client(inode
->i_sb
);
257 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
258 struct ceph_mds_request
*req
;
259 struct ceph_file_info
*cf
= file
->private_data
;
261 int flags
, fmode
, wanted
;
264 dout("open file %p is already opened\n", file
);
268 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
269 flags
= file
->f_flags
& ~(O_CREAT
|O_EXCL
);
270 if (S_ISDIR(inode
->i_mode
))
271 flags
= O_DIRECTORY
; /* mds likes to know */
273 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode
,
274 ceph_vinop(inode
), file
, flags
, file
->f_flags
);
275 fmode
= ceph_flags_to_mode(flags
);
276 wanted
= ceph_caps_for_mode(fmode
);
278 /* snapped files are read-only */
279 if (ceph_snap(inode
) != CEPH_NOSNAP
&& (file
->f_mode
& FMODE_WRITE
))
282 /* trivially open snapdir */
283 if (ceph_snap(inode
) == CEPH_SNAPDIR
) {
284 spin_lock(&ci
->i_ceph_lock
);
285 __ceph_get_fmode(ci
, fmode
);
286 spin_unlock(&ci
->i_ceph_lock
);
287 return ceph_init_file(inode
, file
, fmode
);
291 * No need to block if we have caps on the auth MDS (for
292 * write) or any MDS (for read). Update wanted set
295 spin_lock(&ci
->i_ceph_lock
);
296 if (__ceph_is_any_real_caps(ci
) &&
297 (((fmode
& CEPH_FILE_MODE_WR
) == 0) || ci
->i_auth_cap
)) {
298 int mds_wanted
= __ceph_caps_mds_wanted(ci
);
299 int issued
= __ceph_caps_issued(ci
, NULL
);
301 dout("open %p fmode %d want %s issued %s using existing\n",
302 inode
, fmode
, ceph_cap_string(wanted
),
303 ceph_cap_string(issued
));
304 __ceph_get_fmode(ci
, fmode
);
305 spin_unlock(&ci
->i_ceph_lock
);
308 if ((issued
& wanted
) != wanted
&&
309 (mds_wanted
& wanted
) != wanted
&&
310 ceph_snap(inode
) != CEPH_SNAPDIR
)
311 ceph_check_caps(ci
, 0, NULL
);
313 return ceph_init_file(inode
, file
, fmode
);
314 } else if (ceph_snap(inode
) != CEPH_NOSNAP
&&
315 (ci
->i_snap_caps
& wanted
) == wanted
) {
316 __ceph_get_fmode(ci
, fmode
);
317 spin_unlock(&ci
->i_ceph_lock
);
318 return ceph_init_file(inode
, file
, fmode
);
321 spin_unlock(&ci
->i_ceph_lock
);
323 dout("open fmode %d wants %s\n", fmode
, ceph_cap_string(wanted
));
324 req
= prepare_open_request(inode
->i_sb
, flags
, 0);
329 req
->r_inode
= inode
;
333 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
335 err
= ceph_init_file(inode
, file
, req
->r_fmode
);
336 ceph_mdsc_put_request(req
);
337 dout("open result=%d on %llx.%llx\n", err
, ceph_vinop(inode
));
344 * Do a lookup + open with a single request. If we get a non-existent
345 * file or symlink, return 1 so the VFS can retry.
347 int ceph_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
348 struct file
*file
, unsigned flags
, umode_t mode
,
351 struct ceph_fs_client
*fsc
= ceph_sb_to_client(dir
->i_sb
);
352 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
353 struct ceph_mds_request
*req
;
355 struct ceph_acls_info acls
= {};
359 dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
361 d_unhashed(dentry
) ? "unhashed" : "hashed", flags
, mode
);
363 if (dentry
->d_name
.len
> NAME_MAX
)
364 return -ENAMETOOLONG
;
366 err
= ceph_init_dentry(dentry
);
370 if (flags
& O_CREAT
) {
371 err
= ceph_pre_init_acls(dir
, &mode
, &acls
);
377 req
= prepare_open_request(dir
->i_sb
, flags
, mode
);
382 req
->r_dentry
= dget(dentry
);
384 if (flags
& O_CREAT
) {
385 req
->r_dentry_drop
= CEPH_CAP_FILE_SHARED
;
386 req
->r_dentry_unless
= CEPH_CAP_FILE_EXCL
;
388 req
->r_pagelist
= acls
.pagelist
;
389 acls
.pagelist
= NULL
;
393 mask
= CEPH_STAT_CAP_INODE
| CEPH_CAP_AUTH_SHARED
;
394 if (ceph_security_xattr_wanted(dir
))
395 mask
|= CEPH_CAP_XATTR_SHARED
;
396 req
->r_args
.open
.mask
= cpu_to_le32(mask
);
398 req
->r_locked_dir
= dir
; /* caller holds dir->i_mutex */
399 err
= ceph_mdsc_do_request(mdsc
,
400 (flags
& (O_CREAT
|O_TRUNC
)) ? dir
: NULL
,
402 err
= ceph_handle_snapdir(req
, dentry
, err
);
406 if ((flags
& O_CREAT
) && !req
->r_reply_info
.head
->is_dentry
)
407 err
= ceph_handle_notrace_create(dir
, dentry
);
409 if (d_unhashed(dentry
)) {
410 dn
= ceph_finish_lookup(req
, dentry
, err
);
414 /* we were given a hashed negative dentry */
419 if (dn
|| d_really_is_negative(dentry
) || d_is_symlink(dentry
)) {
420 /* make vfs retry on splice, ENOENT, or symlink */
421 dout("atomic_open finish_no_open on dn %p\n", dn
);
422 err
= finish_no_open(file
, dn
);
424 dout("atomic_open finish_open on dn %p\n", dn
);
425 if (req
->r_op
== CEPH_MDS_OP_CREATE
&& req
->r_reply_info
.has_create_ino
) {
426 ceph_init_inode_acls(d_inode(dentry
), &acls
);
427 *opened
|= FILE_CREATED
;
429 err
= finish_open(file
, dentry
, ceph_open
, opened
);
432 if (!req
->r_err
&& req
->r_target_inode
)
433 ceph_put_fmode(ceph_inode(req
->r_target_inode
), req
->r_fmode
);
434 ceph_mdsc_put_request(req
);
436 ceph_release_acls_info(&acls
);
437 dout("atomic_open result=%d\n", err
);
441 int ceph_release(struct inode
*inode
, struct file
*file
)
443 struct ceph_inode_info
*ci
= ceph_inode(inode
);
444 struct ceph_file_info
*cf
= file
->private_data
;
446 dout("release inode %p file %p\n", inode
, file
);
447 ceph_put_fmode(ci
, cf
->fmode
);
448 if (cf
->last_readdir
)
449 ceph_mdsc_put_request(cf
->last_readdir
);
450 kfree(cf
->last_name
);
452 kmem_cache_free(ceph_file_cachep
, cf
);
454 /* wake up anyone waiting for caps on this inode */
455 wake_up_all(&ci
->i_cap_wq
);
466 * Read a range of bytes striped over one or more objects. Iterate over
467 * objects we stripe over. (That's not atomic, but good enough for now.)
469 * If we get a short result from the OSD, check against i_size; we need to
470 * only return a short read to the caller if we hit EOF.
472 static int striped_read(struct inode
*inode
,
474 struct page
**pages
, int num_pages
,
477 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
478 struct ceph_inode_info
*ci
= ceph_inode(inode
);
479 u64 pos
, this_len
, left
;
481 int page_align
, pages_left
;
483 struct page
**page_pos
;
484 bool hit_stripe
, was_short
;
487 * we may need to do multiple reads. not atomic, unfortunately.
492 pages_left
= num_pages
;
496 page_align
= pos
& ~PAGE_MASK
;
498 ret
= ceph_osdc_readpages(&fsc
->client
->osdc
, ceph_vino(inode
),
499 &ci
->i_layout
, pos
, &this_len
,
502 page_pos
, pages_left
, page_align
);
505 hit_stripe
= this_len
< left
;
506 was_short
= ret
>= 0 && ret
< this_len
;
507 dout("striped_read %llu~%llu (read %u) got %d%s%s\n", pos
, left
, read
,
508 ret
, hit_stripe
? " HITSTRIPE" : "", was_short
? " SHORT" : "");
510 i_size
= i_size_read(inode
);
513 if (was_short
&& (pos
+ ret
< i_size
)) {
514 int zlen
= min(this_len
- ret
, i_size
- pos
- ret
);
515 int zoff
= (off
& ~PAGE_MASK
) + read
+ ret
;
516 dout(" zero gap %llu to %llu\n",
517 pos
+ ret
, pos
+ ret
+ zlen
);
518 ceph_zero_page_vector_range(zoff
, zlen
, pages
);
522 didpages
= (page_align
+ ret
) >> PAGE_SHIFT
;
526 page_pos
+= didpages
;
527 pages_left
-= didpages
;
529 /* hit stripe and need continue*/
530 if (left
&& hit_stripe
&& pos
< i_size
)
536 /* did we bounce off eof? */
537 if (pos
+ left
> i_size
)
538 *checkeof
= CHECK_EOF
;
541 dout("striped_read returns %d\n", ret
);
546 * Completely synchronous read and write methods. Direct from __user
547 * buffer to osd, or directly to user pages (if O_DIRECT).
549 * If the read spans object boundary, just do multiple reads.
551 static ssize_t
ceph_sync_read(struct kiocb
*iocb
, struct iov_iter
*i
,
554 struct file
*file
= iocb
->ki_filp
;
555 struct inode
*inode
= file_inode(file
);
557 u64 off
= iocb
->ki_pos
;
559 size_t len
= iov_iter_count(i
);
561 dout("sync_read on file %p %llu~%u %s\n", file
, off
,
563 (file
->f_flags
& O_DIRECT
) ? "O_DIRECT" : "");
568 * flush any page cache pages in this range. this
569 * will make concurrent normal and sync io slow,
570 * but it will at least behave sensibly when they are
573 ret
= filemap_write_and_wait_range(inode
->i_mapping
, off
,
578 num_pages
= calc_pages_for(off
, len
);
579 pages
= ceph_alloc_page_vector(num_pages
, GFP_KERNEL
);
581 return PTR_ERR(pages
);
582 ret
= striped_read(inode
, off
, len
, pages
,
583 num_pages
, checkeof
);
589 size_t page_off
= off
& ~PAGE_MASK
;
590 size_t copy
= min_t(size_t, left
,
591 PAGE_SIZE
- page_off
);
592 l
= copy_page_to_iter(pages
[k
++], page_off
, copy
, i
);
599 ceph_release_page_vector(pages
, num_pages
);
601 if (off
> iocb
->ki_pos
) {
602 ret
= off
- iocb
->ki_pos
;
606 dout("sync_read result %d\n", ret
);
610 struct ceph_aio_request
{
615 struct list_head osd_reqs
;
617 atomic_t pending_reqs
;
618 struct timespec mtime
;
619 struct ceph_cap_flush
*prealloc_cf
;
622 struct ceph_aio_work
{
623 struct work_struct work
;
624 struct ceph_osd_request
*req
;
627 static void ceph_aio_retry_work(struct work_struct
*work
);
629 static void ceph_aio_complete(struct inode
*inode
,
630 struct ceph_aio_request
*aio_req
)
632 struct ceph_inode_info
*ci
= ceph_inode(inode
);
635 if (!atomic_dec_and_test(&aio_req
->pending_reqs
))
638 ret
= aio_req
->error
;
640 ret
= aio_req
->total_len
;
642 dout("ceph_aio_complete %p rc %d\n", inode
, ret
);
644 if (ret
>= 0 && aio_req
->write
) {
647 loff_t endoff
= aio_req
->iocb
->ki_pos
+ aio_req
->total_len
;
648 if (endoff
> i_size_read(inode
)) {
649 if (ceph_inode_set_size(inode
, endoff
))
650 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
653 spin_lock(&ci
->i_ceph_lock
);
654 ci
->i_inline_version
= CEPH_INLINE_NONE
;
655 dirty
= __ceph_mark_dirty_caps(ci
, CEPH_CAP_FILE_WR
,
656 &aio_req
->prealloc_cf
);
657 spin_unlock(&ci
->i_ceph_lock
);
659 __mark_inode_dirty(inode
, dirty
);
663 ceph_put_cap_refs(ci
, (aio_req
->write
? CEPH_CAP_FILE_WR
:
666 aio_req
->iocb
->ki_complete(aio_req
->iocb
, ret
, 0);
668 ceph_free_cap_flush(aio_req
->prealloc_cf
);
672 static void ceph_aio_complete_req(struct ceph_osd_request
*req
)
674 int rc
= req
->r_result
;
675 struct inode
*inode
= req
->r_inode
;
676 struct ceph_aio_request
*aio_req
= req
->r_priv
;
677 struct ceph_osd_data
*osd_data
= osd_req_op_extent_osd_data(req
, 0);
678 int num_pages
= calc_pages_for((u64
)osd_data
->alignment
,
681 dout("ceph_aio_complete_req %p rc %d bytes %llu\n",
682 inode
, rc
, osd_data
->length
);
684 if (rc
== -EOLDSNAPC
) {
685 struct ceph_aio_work
*aio_work
;
686 BUG_ON(!aio_req
->write
);
688 aio_work
= kmalloc(sizeof(*aio_work
), GFP_NOFS
);
690 INIT_WORK(&aio_work
->work
, ceph_aio_retry_work
);
692 queue_work(ceph_inode_to_client(inode
)->wb_wq
,
697 } else if (!aio_req
->write
) {
700 if (rc
>= 0 && osd_data
->length
> rc
) {
701 int zoff
= osd_data
->alignment
+ rc
;
702 int zlen
= osd_data
->length
- rc
;
704 * If read is satisfied by single OSD request,
705 * it can pass EOF. Otherwise read is within
708 if (aio_req
->num_reqs
== 1) {
709 loff_t i_size
= i_size_read(inode
);
710 loff_t endoff
= aio_req
->iocb
->ki_pos
+ rc
;
712 zlen
= min_t(size_t, zlen
,
714 aio_req
->total_len
= rc
+ zlen
;
718 ceph_zero_page_vector_range(zoff
, zlen
,
723 ceph_put_page_vector(osd_data
->pages
, num_pages
, false);
724 ceph_osdc_put_request(req
);
727 cmpxchg(&aio_req
->error
, 0, rc
);
729 ceph_aio_complete(inode
, aio_req
);
733 static void ceph_aio_retry_work(struct work_struct
*work
)
735 struct ceph_aio_work
*aio_work
=
736 container_of(work
, struct ceph_aio_work
, work
);
737 struct ceph_osd_request
*orig_req
= aio_work
->req
;
738 struct ceph_aio_request
*aio_req
= orig_req
->r_priv
;
739 struct inode
*inode
= orig_req
->r_inode
;
740 struct ceph_inode_info
*ci
= ceph_inode(inode
);
741 struct ceph_snap_context
*snapc
;
742 struct ceph_osd_request
*req
;
745 spin_lock(&ci
->i_ceph_lock
);
746 if (__ceph_have_pending_cap_snap(ci
)) {
747 struct ceph_cap_snap
*capsnap
=
748 list_last_entry(&ci
->i_cap_snaps
,
749 struct ceph_cap_snap
,
751 snapc
= ceph_get_snap_context(capsnap
->context
);
753 BUG_ON(!ci
->i_head_snapc
);
754 snapc
= ceph_get_snap_context(ci
->i_head_snapc
);
756 spin_unlock(&ci
->i_ceph_lock
);
758 req
= ceph_osdc_alloc_request(orig_req
->r_osdc
, snapc
, 2,
766 req
->r_flags
= CEPH_OSD_FLAG_ORDERSNAP
|
767 CEPH_OSD_FLAG_ONDISK
|
769 ceph_oloc_copy(&req
->r_base_oloc
, &orig_req
->r_base_oloc
);
770 ceph_oid_copy(&req
->r_base_oid
, &orig_req
->r_base_oid
);
772 ret
= ceph_osdc_alloc_messages(req
, GFP_NOFS
);
774 ceph_osdc_put_request(req
);
779 req
->r_ops
[0] = orig_req
->r_ops
[0];
780 osd_req_op_init(req
, 1, CEPH_OSD_OP_STARTSYNC
, 0);
782 req
->r_mtime
= aio_req
->mtime
;
783 req
->r_data_offset
= req
->r_ops
[0].extent
.offset
;
785 ceph_osdc_put_request(orig_req
);
787 req
->r_callback
= ceph_aio_complete_req
;
788 req
->r_inode
= inode
;
789 req
->r_priv
= aio_req
;
791 ret
= ceph_osdc_start_request(req
->r_osdc
, req
, false);
795 ceph_aio_complete_req(req
);
798 ceph_put_snap_context(snapc
);
803 * Write commit request unsafe callback, called to tell us when a
804 * request is unsafe (that is, in flight--has been handed to the
805 * messenger to send to its target osd). It is called again when
806 * we've received a response message indicating the request is
807 * "safe" (its CEPH_OSD_FLAG_ONDISK flag is set), or when a request
808 * is completed early (and unsuccessfully) due to a timeout or
811 * This is used if we requested both an ACK and ONDISK commit reply
814 static void ceph_sync_write_unsafe(struct ceph_osd_request
*req
, bool unsafe
)
816 struct ceph_inode_info
*ci
= ceph_inode(req
->r_inode
);
818 dout("%s %p tid %llu %ssafe\n", __func__
, req
, req
->r_tid
,
821 ceph_get_cap_refs(ci
, CEPH_CAP_FILE_WR
);
822 spin_lock(&ci
->i_unsafe_lock
);
823 list_add_tail(&req
->r_unsafe_item
,
824 &ci
->i_unsafe_writes
);
825 spin_unlock(&ci
->i_unsafe_lock
);
827 complete_all(&req
->r_completion
);
829 spin_lock(&ci
->i_unsafe_lock
);
830 list_del_init(&req
->r_unsafe_item
);
831 spin_unlock(&ci
->i_unsafe_lock
);
832 ceph_put_cap_refs(ci
, CEPH_CAP_FILE_WR
);
838 ceph_direct_read_write(struct kiocb
*iocb
, struct iov_iter
*iter
,
839 struct ceph_snap_context
*snapc
,
840 struct ceph_cap_flush
**pcf
)
842 struct file
*file
= iocb
->ki_filp
;
843 struct inode
*inode
= file_inode(file
);
844 struct ceph_inode_info
*ci
= ceph_inode(inode
);
845 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
846 struct ceph_vino vino
;
847 struct ceph_osd_request
*req
;
849 struct ceph_aio_request
*aio_req
= NULL
;
853 struct timespec mtime
= current_fs_time(inode
->i_sb
);
854 size_t count
= iov_iter_count(iter
);
855 loff_t pos
= iocb
->ki_pos
;
856 bool write
= iov_iter_rw(iter
) == WRITE
;
858 if (write
&& ceph_snap(file_inode(file
)) != CEPH_NOSNAP
)
861 dout("sync_direct_read_write (%s) on file %p %lld~%u\n",
862 (write
? "write" : "read"), file
, pos
, (unsigned)count
);
864 ret
= filemap_write_and_wait_range(inode
->i_mapping
, pos
, pos
+ count
);
869 ret
= invalidate_inode_pages2_range(inode
->i_mapping
,
871 (pos
+ count
) >> PAGE_SHIFT
);
873 dout("invalidate_inode_pages2_range returned %d\n", ret
);
875 flags
= CEPH_OSD_FLAG_ORDERSNAP
|
876 CEPH_OSD_FLAG_ONDISK
|
879 flags
= CEPH_OSD_FLAG_READ
;
882 while (iov_iter_count(iter
) > 0) {
883 u64 size
= dio_get_pagev_size(iter
);
887 vino
= ceph_vino(inode
);
888 req
= ceph_osdc_new_request(&fsc
->client
->osdc
, &ci
->i_layout
,
890 /*include a 'startsync' command*/
892 write
? CEPH_OSD_OP_WRITE
:
904 pages
= dio_get_pages_alloc(iter
, len
, &start
, &num_pages
);
906 ceph_osdc_put_request(req
);
907 ret
= PTR_ERR(pages
);
912 * To simplify error handling, allow AIO when IO within i_size
913 * or IO can be satisfied by single OSD request.
915 if (pos
== iocb
->ki_pos
&& !is_sync_kiocb(iocb
) &&
916 (len
== count
|| pos
+ count
<= i_size_read(inode
))) {
917 aio_req
= kzalloc(sizeof(*aio_req
), GFP_KERNEL
);
919 aio_req
->iocb
= iocb
;
920 aio_req
->write
= write
;
921 INIT_LIST_HEAD(&aio_req
->osd_reqs
);
923 aio_req
->mtime
= mtime
;
924 swap(aio_req
->prealloc_cf
, *pcf
);
932 * throw out any page cache pages in this range. this
935 truncate_inode_pages_range(inode
->i_mapping
, pos
,
936 (pos
+len
) | (PAGE_SIZE
- 1));
938 osd_req_op_init(req
, 1, CEPH_OSD_OP_STARTSYNC
, 0);
939 req
->r_mtime
= mtime
;
942 osd_req_op_extent_osd_data_pages(req
, 0, pages
, len
, start
,
946 aio_req
->total_len
+= len
;
948 atomic_inc(&aio_req
->pending_reqs
);
950 req
->r_callback
= ceph_aio_complete_req
;
951 req
->r_inode
= inode
;
952 req
->r_priv
= aio_req
;
953 list_add_tail(&req
->r_unsafe_item
, &aio_req
->osd_reqs
);
956 iov_iter_advance(iter
, len
);
960 ret
= ceph_osdc_start_request(req
->r_osdc
, req
, false);
962 ret
= ceph_osdc_wait_request(&fsc
->client
->osdc
, req
);
964 size
= i_size_read(inode
);
968 if (ret
>= 0 && ret
< len
&& pos
+ ret
< size
) {
969 int zlen
= min_t(size_t, len
- ret
,
971 ceph_zero_page_vector_range(start
+ ret
, zlen
,
979 ceph_put_page_vector(pages
, num_pages
, false);
981 ceph_osdc_put_request(req
);
986 iov_iter_advance(iter
, len
);
988 if (!write
&& pos
>= size
)
991 if (write
&& pos
> size
) {
992 if (ceph_inode_set_size(inode
, pos
))
993 ceph_check_caps(ceph_inode(inode
),
1000 if (aio_req
->num_reqs
== 0) {
1005 ceph_get_cap_refs(ci
, write
? CEPH_CAP_FILE_WR
:
1008 while (!list_empty(&aio_req
->osd_reqs
)) {
1009 req
= list_first_entry(&aio_req
->osd_reqs
,
1010 struct ceph_osd_request
,
1012 list_del_init(&req
->r_unsafe_item
);
1014 ret
= ceph_osdc_start_request(req
->r_osdc
,
1017 req
->r_result
= ret
;
1018 ceph_aio_complete_req(req
);
1021 return -EIOCBQUEUED
;
1024 if (ret
!= -EOLDSNAPC
&& pos
> iocb
->ki_pos
) {
1025 ret
= pos
- iocb
->ki_pos
;
1032 * Synchronous write, straight from __user pointer or user pages.
1034 * If write spans object boundary, just do multiple writes. (For a
1035 * correct atomic write, we should e.g. take write locks on all
1036 * objects, rollback on failure, etc.)
1039 ceph_sync_write(struct kiocb
*iocb
, struct iov_iter
*from
, loff_t pos
,
1040 struct ceph_snap_context
*snapc
)
1042 struct file
*file
= iocb
->ki_filp
;
1043 struct inode
*inode
= file_inode(file
);
1044 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1045 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1046 struct ceph_vino vino
;
1047 struct ceph_osd_request
*req
;
1048 struct page
**pages
;
1055 struct timespec mtime
= current_fs_time(inode
->i_sb
);
1056 size_t count
= iov_iter_count(from
);
1058 if (ceph_snap(file_inode(file
)) != CEPH_NOSNAP
)
1061 dout("sync_write on file %p %lld~%u\n", file
, pos
, (unsigned)count
);
1063 ret
= filemap_write_and_wait_range(inode
->i_mapping
, pos
, pos
+ count
);
1067 ret
= invalidate_inode_pages2_range(inode
->i_mapping
,
1069 (pos
+ count
) >> PAGE_SHIFT
);
1071 dout("invalidate_inode_pages2_range returned %d\n", ret
);
1073 flags
= CEPH_OSD_FLAG_ORDERSNAP
|
1074 CEPH_OSD_FLAG_ONDISK
|
1075 CEPH_OSD_FLAG_WRITE
|
1078 while ((len
= iov_iter_count(from
)) > 0) {
1082 vino
= ceph_vino(inode
);
1083 req
= ceph_osdc_new_request(&fsc
->client
->osdc
, &ci
->i_layout
,
1084 vino
, pos
, &len
, 0, 1,
1085 CEPH_OSD_OP_WRITE
, flags
, snapc
,
1087 ci
->i_truncate_size
,
1095 * write from beginning of first page,
1096 * regardless of io alignment
1098 num_pages
= (len
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1100 pages
= ceph_alloc_page_vector(num_pages
, GFP_KERNEL
);
1101 if (IS_ERR(pages
)) {
1102 ret
= PTR_ERR(pages
);
1107 for (n
= 0; n
< num_pages
; n
++) {
1108 size_t plen
= min_t(size_t, left
, PAGE_SIZE
);
1109 ret
= copy_page_from_iter(pages
[n
], 0, plen
, from
);
1118 ceph_release_page_vector(pages
, num_pages
);
1122 /* get a second commit callback */
1123 req
->r_unsafe_callback
= ceph_sync_write_unsafe
;
1124 req
->r_inode
= inode
;
1126 osd_req_op_extent_osd_data_pages(req
, 0, pages
, len
, 0,
1129 req
->r_mtime
= mtime
;
1130 ret
= ceph_osdc_start_request(&fsc
->client
->osdc
, req
, false);
1132 ret
= ceph_osdc_wait_request(&fsc
->client
->osdc
, req
);
1135 ceph_osdc_put_request(req
);
1140 if (pos
> i_size_read(inode
)) {
1141 check_caps
= ceph_inode_set_size(inode
, pos
);
1143 ceph_check_caps(ceph_inode(inode
),
1144 CHECK_CAPS_AUTHONLY
,
1151 if (ret
!= -EOLDSNAPC
&& written
> 0) {
1159 * Wrap generic_file_aio_read with checks for cap bits on the inode.
1160 * Atomically grab references, so that those bits are not released
1161 * back to the MDS mid-read.
1163 * Hmm, the sync read case isn't actually async... should it be?
1165 static ssize_t
ceph_read_iter(struct kiocb
*iocb
, struct iov_iter
*to
)
1167 struct file
*filp
= iocb
->ki_filp
;
1168 struct ceph_file_info
*fi
= filp
->private_data
;
1169 size_t len
= iov_iter_count(to
);
1170 struct inode
*inode
= file_inode(filp
);
1171 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1172 struct page
*pinned_page
= NULL
;
1175 int retry_op
= 0, read
= 0;
1178 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
1179 inode
, ceph_vinop(inode
), iocb
->ki_pos
, (unsigned)len
, inode
);
1181 if (fi
->fmode
& CEPH_FILE_MODE_LAZY
)
1182 want
= CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_LAZYIO
;
1184 want
= CEPH_CAP_FILE_CACHE
;
1185 ret
= ceph_get_caps(ci
, CEPH_CAP_FILE_RD
, want
, -1, &got
, &pinned_page
);
1189 if ((got
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) == 0 ||
1190 (iocb
->ki_flags
& IOCB_DIRECT
) ||
1191 (fi
->flags
& CEPH_F_SYNC
)) {
1193 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1194 inode
, ceph_vinop(inode
), iocb
->ki_pos
, (unsigned)len
,
1195 ceph_cap_string(got
));
1197 if (ci
->i_inline_version
== CEPH_INLINE_NONE
) {
1198 if (!retry_op
&& (iocb
->ki_flags
& IOCB_DIRECT
)) {
1199 ret
= ceph_direct_read_write(iocb
, to
,
1201 if (ret
>= 0 && ret
< len
)
1202 retry_op
= CHECK_EOF
;
1204 ret
= ceph_sync_read(iocb
, to
, &retry_op
);
1207 retry_op
= READ_INLINE
;
1210 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1211 inode
, ceph_vinop(inode
), iocb
->ki_pos
, (unsigned)len
,
1212 ceph_cap_string(got
));
1214 ret
= generic_file_read_iter(iocb
, to
);
1216 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
1217 inode
, ceph_vinop(inode
), ceph_cap_string(got
), (int)ret
);
1219 put_page(pinned_page
);
1222 ceph_put_cap_refs(ci
, got
);
1223 if (retry_op
> HAVE_RETRIED
&& ret
>= 0) {
1225 struct page
*page
= NULL
;
1227 if (retry_op
== READ_INLINE
) {
1228 page
= __page_cache_alloc(GFP_KERNEL
);
1233 statret
= __ceph_do_getattr(inode
, page
,
1234 CEPH_STAT_CAP_INLINE_DATA
, !!page
);
1237 if (statret
== -ENODATA
) {
1238 BUG_ON(retry_op
!= READ_INLINE
);
1244 i_size
= i_size_read(inode
);
1245 if (retry_op
== READ_INLINE
) {
1246 BUG_ON(ret
> 0 || read
> 0);
1247 if (iocb
->ki_pos
< i_size
&&
1248 iocb
->ki_pos
< PAGE_SIZE
) {
1249 loff_t end
= min_t(loff_t
, i_size
,
1250 iocb
->ki_pos
+ len
);
1251 end
= min_t(loff_t
, end
, PAGE_SIZE
);
1253 zero_user_segment(page
, statret
, end
);
1254 ret
= copy_page_to_iter(page
,
1255 iocb
->ki_pos
& ~PAGE_MASK
,
1256 end
- iocb
->ki_pos
, to
);
1257 iocb
->ki_pos
+= ret
;
1260 if (iocb
->ki_pos
< i_size
&& read
< len
) {
1261 size_t zlen
= min_t(size_t, len
- read
,
1262 i_size
- iocb
->ki_pos
);
1263 ret
= iov_iter_zero(zlen
, to
);
1264 iocb
->ki_pos
+= ret
;
1267 __free_pages(page
, 0);
1271 /* hit EOF or hole? */
1272 if (retry_op
== CHECK_EOF
&& iocb
->ki_pos
< i_size
&&
1274 dout("sync_read hit hole, ppos %lld < size %lld"
1275 ", reading more\n", iocb
->ki_pos
, i_size
);
1279 retry_op
= HAVE_RETRIED
;
1291 * Take cap references to avoid releasing caps to MDS mid-write.
1293 * If we are synchronous, and write with an old snap context, the OSD
1294 * may return EOLDSNAPC. In that case, retry the write.. _after_
1295 * dropping our cap refs and allowing the pending snap to logically
1296 * complete _before_ this write occurs.
1298 * If we are near ENOSPC, write synchronously.
1300 static ssize_t
ceph_write_iter(struct kiocb
*iocb
, struct iov_iter
*from
)
1302 struct file
*file
= iocb
->ki_filp
;
1303 struct ceph_file_info
*fi
= file
->private_data
;
1304 struct inode
*inode
= file_inode(file
);
1305 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1306 struct ceph_osd_client
*osdc
=
1307 &ceph_sb_to_client(inode
->i_sb
)->client
->osdc
;
1308 struct ceph_cap_flush
*prealloc_cf
;
1309 ssize_t count
, written
= 0;
1313 if (ceph_snap(inode
) != CEPH_NOSNAP
)
1316 prealloc_cf
= ceph_alloc_cap_flush();
1322 /* We can write back this queue in page reclaim */
1323 current
->backing_dev_info
= inode_to_bdi(inode
);
1325 if (iocb
->ki_flags
& IOCB_APPEND
) {
1326 err
= ceph_do_getattr(inode
, CEPH_STAT_CAP_SIZE
, false);
1331 err
= generic_write_checks(iocb
, from
);
1336 count
= iov_iter_count(from
);
1337 err
= file_remove_privs(file
);
1341 err
= file_update_time(file
);
1345 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
) {
1346 err
= ceph_uninline_data(file
, NULL
);
1352 if (ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_FULL
)) {
1357 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
1358 inode
, ceph_vinop(inode
), pos
, count
, i_size_read(inode
));
1359 if (fi
->fmode
& CEPH_FILE_MODE_LAZY
)
1360 want
= CEPH_CAP_FILE_BUFFER
| CEPH_CAP_FILE_LAZYIO
;
1362 want
= CEPH_CAP_FILE_BUFFER
;
1364 err
= ceph_get_caps(ci
, CEPH_CAP_FILE_WR
, want
, pos
+ count
,
1369 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
1370 inode
, ceph_vinop(inode
), pos
, count
, ceph_cap_string(got
));
1372 if ((got
& (CEPH_CAP_FILE_BUFFER
|CEPH_CAP_FILE_LAZYIO
)) == 0 ||
1373 (iocb
->ki_flags
& IOCB_DIRECT
) || (fi
->flags
& CEPH_F_SYNC
)) {
1374 struct ceph_snap_context
*snapc
;
1375 struct iov_iter data
;
1376 inode_unlock(inode
);
1378 spin_lock(&ci
->i_ceph_lock
);
1379 if (__ceph_have_pending_cap_snap(ci
)) {
1380 struct ceph_cap_snap
*capsnap
=
1381 list_last_entry(&ci
->i_cap_snaps
,
1382 struct ceph_cap_snap
,
1384 snapc
= ceph_get_snap_context(capsnap
->context
);
1386 BUG_ON(!ci
->i_head_snapc
);
1387 snapc
= ceph_get_snap_context(ci
->i_head_snapc
);
1389 spin_unlock(&ci
->i_ceph_lock
);
1391 /* we might need to revert back to that point */
1393 if (iocb
->ki_flags
& IOCB_DIRECT
)
1394 written
= ceph_direct_read_write(iocb
, &data
, snapc
,
1397 written
= ceph_sync_write(iocb
, &data
, pos
, snapc
);
1398 if (written
== -EOLDSNAPC
) {
1399 dout("aio_write %p %llx.%llx %llu~%u"
1400 "got EOLDSNAPC, retrying\n",
1401 inode
, ceph_vinop(inode
),
1402 pos
, (unsigned)count
);
1407 iov_iter_advance(from
, written
);
1408 ceph_put_snap_context(snapc
);
1410 loff_t old_size
= i_size_read(inode
);
1412 * No need to acquire the i_truncate_mutex. Because
1413 * the MDS revokes Fwb caps before sending truncate
1414 * message to us. We can't get Fwb cap while there
1415 * are pending vmtruncate. So write and vmtruncate
1416 * can not run at the same time
1418 written
= generic_perform_write(file
, from
, pos
);
1419 if (likely(written
>= 0))
1420 iocb
->ki_pos
= pos
+ written
;
1421 if (i_size_read(inode
) > old_size
)
1422 ceph_fscache_update_objectsize(inode
);
1423 inode_unlock(inode
);
1428 spin_lock(&ci
->i_ceph_lock
);
1429 ci
->i_inline_version
= CEPH_INLINE_NONE
;
1430 dirty
= __ceph_mark_dirty_caps(ci
, CEPH_CAP_FILE_WR
,
1432 spin_unlock(&ci
->i_ceph_lock
);
1434 __mark_inode_dirty(inode
, dirty
);
1437 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
1438 inode
, ceph_vinop(inode
), pos
, (unsigned)count
,
1439 ceph_cap_string(got
));
1440 ceph_put_cap_refs(ci
, got
);
1443 if (ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_NEARFULL
))
1444 iocb
->ki_flags
|= IOCB_DSYNC
;
1446 written
= generic_write_sync(iocb
, written
);
1452 inode_unlock(inode
);
1454 ceph_free_cap_flush(prealloc_cf
);
1455 current
->backing_dev_info
= NULL
;
1456 return written
? written
: err
;
1460 * llseek. be sure to verify file size on SEEK_END.
1462 static loff_t
ceph_llseek(struct file
*file
, loff_t offset
, int whence
)
1464 struct inode
*inode
= file
->f_mapping
->host
;
1470 if (whence
== SEEK_END
|| whence
== SEEK_DATA
|| whence
== SEEK_HOLE
) {
1471 ret
= ceph_do_getattr(inode
, CEPH_STAT_CAP_SIZE
, false);
1478 i_size
= i_size_read(inode
);
1485 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1486 * position-querying operation. Avoid rewriting the "same"
1487 * f_pos value back to the file because a concurrent read(),
1488 * write() or lseek() might have altered it
1491 offset
= file
->f_pos
;
1494 offset
+= file
->f_pos
;
1497 if (offset
>= i_size
) {
1503 if (offset
>= i_size
) {
1511 offset
= vfs_setpos(file
, offset
, inode
->i_sb
->s_maxbytes
);
1514 inode_unlock(inode
);
1518 static inline void ceph_zero_partial_page(
1519 struct inode
*inode
, loff_t offset
, unsigned size
)
1522 pgoff_t index
= offset
>> PAGE_SHIFT
;
1524 page
= find_lock_page(inode
->i_mapping
, index
);
1526 wait_on_page_writeback(page
);
1527 zero_user(page
, offset
& (PAGE_SIZE
- 1), size
);
1533 static void ceph_zero_pagecache_range(struct inode
*inode
, loff_t offset
,
1536 loff_t nearly
= round_up(offset
, PAGE_SIZE
);
1537 if (offset
< nearly
) {
1538 loff_t size
= nearly
- offset
;
1541 ceph_zero_partial_page(inode
, offset
, size
);
1545 if (length
>= PAGE_SIZE
) {
1546 loff_t size
= round_down(length
, PAGE_SIZE
);
1547 truncate_pagecache_range(inode
, offset
, offset
+ size
- 1);
1552 ceph_zero_partial_page(inode
, offset
, length
);
1555 static int ceph_zero_partial_object(struct inode
*inode
,
1556 loff_t offset
, loff_t
*length
)
1558 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1559 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1560 struct ceph_osd_request
*req
;
1566 op
= offset
? CEPH_OSD_OP_DELETE
: CEPH_OSD_OP_TRUNCATE
;
1569 op
= CEPH_OSD_OP_ZERO
;
1572 req
= ceph_osdc_new_request(&fsc
->client
->osdc
, &ci
->i_layout
,
1576 CEPH_OSD_FLAG_WRITE
|
1577 CEPH_OSD_FLAG_ONDISK
,
1584 req
->r_mtime
= inode
->i_mtime
;
1585 ret
= ceph_osdc_start_request(&fsc
->client
->osdc
, req
, false);
1587 ret
= ceph_osdc_wait_request(&fsc
->client
->osdc
, req
);
1591 ceph_osdc_put_request(req
);
1597 static int ceph_zero_objects(struct inode
*inode
, loff_t offset
, loff_t length
)
1600 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1601 s32 stripe_unit
= ceph_file_layout_su(ci
->i_layout
);
1602 s32 stripe_count
= ceph_file_layout_stripe_count(ci
->i_layout
);
1603 s32 object_size
= ceph_file_layout_object_size(ci
->i_layout
);
1604 u64 object_set_size
= object_size
* stripe_count
;
1607 /* round offset up to next period boundary */
1608 nearly
= offset
+ object_set_size
- 1;
1610 nearly
-= do_div(t
, object_set_size
);
1612 while (length
&& offset
< nearly
) {
1613 loff_t size
= length
;
1614 ret
= ceph_zero_partial_object(inode
, offset
, &size
);
1620 while (length
>= object_set_size
) {
1622 loff_t pos
= offset
;
1623 for (i
= 0; i
< stripe_count
; ++i
) {
1624 ret
= ceph_zero_partial_object(inode
, pos
, NULL
);
1629 offset
+= object_set_size
;
1630 length
-= object_set_size
;
1633 loff_t size
= length
;
1634 ret
= ceph_zero_partial_object(inode
, offset
, &size
);
1643 static long ceph_fallocate(struct file
*file
, int mode
,
1644 loff_t offset
, loff_t length
)
1646 struct ceph_file_info
*fi
= file
->private_data
;
1647 struct inode
*inode
= file_inode(file
);
1648 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1649 struct ceph_osd_client
*osdc
=
1650 &ceph_inode_to_client(inode
)->client
->osdc
;
1651 struct ceph_cap_flush
*prealloc_cf
;
1658 if (mode
& ~(FALLOC_FL_KEEP_SIZE
| FALLOC_FL_PUNCH_HOLE
))
1661 if (!S_ISREG(inode
->i_mode
))
1664 prealloc_cf
= ceph_alloc_cap_flush();
1670 if (ceph_snap(inode
) != CEPH_NOSNAP
) {
1675 if (ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_FULL
) &&
1676 !(mode
& FALLOC_FL_PUNCH_HOLE
)) {
1681 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
) {
1682 ret
= ceph_uninline_data(file
, NULL
);
1687 size
= i_size_read(inode
);
1688 if (!(mode
& FALLOC_FL_KEEP_SIZE
))
1689 endoff
= offset
+ length
;
1691 if (fi
->fmode
& CEPH_FILE_MODE_LAZY
)
1692 want
= CEPH_CAP_FILE_BUFFER
| CEPH_CAP_FILE_LAZYIO
;
1694 want
= CEPH_CAP_FILE_BUFFER
;
1696 ret
= ceph_get_caps(ci
, CEPH_CAP_FILE_WR
, want
, endoff
, &got
, NULL
);
1700 if (mode
& FALLOC_FL_PUNCH_HOLE
) {
1702 ceph_zero_pagecache_range(inode
, offset
, length
);
1703 ret
= ceph_zero_objects(inode
, offset
, length
);
1704 } else if (endoff
> size
) {
1705 truncate_pagecache_range(inode
, size
, -1);
1706 if (ceph_inode_set_size(inode
, endoff
))
1707 ceph_check_caps(ceph_inode(inode
),
1708 CHECK_CAPS_AUTHONLY
, NULL
);
1712 spin_lock(&ci
->i_ceph_lock
);
1713 ci
->i_inline_version
= CEPH_INLINE_NONE
;
1714 dirty
= __ceph_mark_dirty_caps(ci
, CEPH_CAP_FILE_WR
,
1716 spin_unlock(&ci
->i_ceph_lock
);
1718 __mark_inode_dirty(inode
, dirty
);
1721 ceph_put_cap_refs(ci
, got
);
1723 inode_unlock(inode
);
1724 ceph_free_cap_flush(prealloc_cf
);
1728 const struct file_operations ceph_file_fops
= {
1730 .release
= ceph_release
,
1731 .llseek
= ceph_llseek
,
1732 .read_iter
= ceph_read_iter
,
1733 .write_iter
= ceph_write_iter
,
1735 .fsync
= ceph_fsync
,
1737 .flock
= ceph_flock
,
1738 .splice_read
= generic_file_splice_read
,
1739 .splice_write
= iter_file_splice_write
,
1740 .unlocked_ioctl
= ceph_ioctl
,
1741 .compat_ioctl
= ceph_ioctl
,
1742 .fallocate
= ceph_fallocate
,