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"
16 static __le32
ceph_flags_sys2wire(u32 flags
)
20 switch (flags
& O_ACCMODE
) {
22 wire_flags
|= CEPH_O_RDONLY
;
25 wire_flags
|= CEPH_O_WRONLY
;
28 wire_flags
|= CEPH_O_RDWR
;
32 #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
34 ceph_sys2wire(O_CREAT
);
35 ceph_sys2wire(O_EXCL
);
36 ceph_sys2wire(O_TRUNC
);
37 ceph_sys2wire(O_DIRECTORY
);
38 ceph_sys2wire(O_NOFOLLOW
);
43 dout("unused open flags: %x", flags
);
45 return cpu_to_le32(wire_flags
);
49 * Ceph file operations
51 * Implement basic open/close functionality, and implement
54 * We implement three modes of file I/O:
55 * - buffered uses the generic_file_aio_{read,write} helpers
57 * - synchronous is used when there is multi-client read/write
58 * sharing, avoids the page cache, and synchronously waits for an
61 * - direct io takes the variant of the sync path that references
62 * user pages directly.
64 * fsync() flushes and waits on dirty pages, but just queues metadata
65 * for writeback: since the MDS can recover size and mtime there is no
66 * need to wait for MDS acknowledgement.
70 * Calculate the length sum of direct io vectors that can
71 * be combined into one page vector.
73 static size_t dio_get_pagev_size(const struct iov_iter
*it
)
75 const struct iovec
*iov
= it
->iov
;
76 const struct iovec
*iovend
= iov
+ it
->nr_segs
;
79 size
= iov
->iov_len
- it
->iov_offset
;
81 * An iov can be page vectored when both the current tail
82 * and the next base are page aligned.
84 while (PAGE_ALIGNED((iov
->iov_base
+ iov
->iov_len
)) &&
85 (++iov
< iovend
&& PAGE_ALIGNED((iov
->iov_base
)))) {
88 dout("dio_get_pagevlen len = %zu\n", size
);
93 * Allocate a page vector based on (@it, @nbytes).
94 * The return value is the tuple describing a page vector,
95 * that is (@pages, @page_align, @num_pages).
98 dio_get_pages_alloc(const struct iov_iter
*it
, size_t nbytes
,
99 size_t *page_align
, int *num_pages
)
101 struct iov_iter tmp_it
= *it
;
104 int ret
= 0, idx
, npages
;
106 align
= (unsigned long)(it
->iov
->iov_base
+ it
->iov_offset
) &
108 npages
= calc_pages_for(align
, nbytes
);
109 pages
= kvmalloc(sizeof(*pages
) * npages
, GFP_KERNEL
);
111 return ERR_PTR(-ENOMEM
);
113 for (idx
= 0; idx
< npages
; ) {
115 ret
= iov_iter_get_pages(&tmp_it
, pages
+ idx
, nbytes
,
116 npages
- idx
, &start
);
120 iov_iter_advance(&tmp_it
, ret
);
122 idx
+= (ret
+ start
+ PAGE_SIZE
- 1) / PAGE_SIZE
;
128 dout("dio_get_pages_alloc: got %d pages align %zu\n", npages
, align
);
131 ceph_put_page_vector(pages
, idx
, false);
136 * Prepare an open request. Preallocate ceph_cap to avoid an
137 * inopportune ENOMEM later.
139 static struct ceph_mds_request
*
140 prepare_open_request(struct super_block
*sb
, int flags
, int create_mode
)
142 struct ceph_fs_client
*fsc
= ceph_sb_to_client(sb
);
143 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
144 struct ceph_mds_request
*req
;
145 int want_auth
= USE_ANY_MDS
;
146 int op
= (flags
& O_CREAT
) ? CEPH_MDS_OP_CREATE
: CEPH_MDS_OP_OPEN
;
148 if (flags
& (O_WRONLY
|O_RDWR
|O_CREAT
|O_TRUNC
))
149 want_auth
= USE_AUTH_MDS
;
151 req
= ceph_mdsc_create_request(mdsc
, op
, want_auth
);
154 req
->r_fmode
= ceph_flags_to_mode(flags
);
155 req
->r_args
.open
.flags
= ceph_flags_sys2wire(flags
);
156 req
->r_args
.open
.mode
= cpu_to_le32(create_mode
);
162 * initialize private struct file data.
163 * if we fail, clean up by dropping fmode reference on the ceph_inode
165 static int ceph_init_file(struct inode
*inode
, struct file
*file
, int fmode
)
167 struct ceph_file_info
*cf
;
170 switch (inode
->i_mode
& S_IFMT
) {
172 ceph_fscache_register_inode_cookie(inode
);
173 ceph_fscache_file_set_cookie(inode
, file
);
175 dout("init_file %p %p 0%o (regular)\n", inode
, file
,
177 cf
= kmem_cache_zalloc(ceph_file_cachep
, GFP_KERNEL
);
179 ceph_put_fmode(ceph_inode(inode
), fmode
); /* clean up */
184 cf
->readdir_cache_idx
= -1;
185 file
->private_data
= cf
;
186 BUG_ON(inode
->i_fop
->release
!= ceph_release
);
190 dout("init_file %p %p 0%o (symlink)\n", inode
, file
,
192 ceph_put_fmode(ceph_inode(inode
), fmode
); /* clean up */
196 dout("init_file %p %p 0%o (special)\n", inode
, file
,
199 * we need to drop the open ref now, since we don't
200 * have .release set to ceph_release.
202 ceph_put_fmode(ceph_inode(inode
), fmode
); /* clean up */
203 BUG_ON(inode
->i_fop
->release
== ceph_release
);
205 /* call the proper open fop */
206 ret
= inode
->i_fop
->open(inode
, file
);
212 * try renew caps after session gets killed.
214 int ceph_renew_caps(struct inode
*inode
)
216 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
217 struct ceph_inode_info
*ci
= ceph_inode(inode
);
218 struct ceph_mds_request
*req
;
219 int err
, flags
, wanted
;
221 spin_lock(&ci
->i_ceph_lock
);
222 wanted
= __ceph_caps_file_wanted(ci
);
223 if (__ceph_is_any_real_caps(ci
) &&
224 (!(wanted
& CEPH_CAP_ANY_WR
) || ci
->i_auth_cap
)) {
225 int issued
= __ceph_caps_issued(ci
, NULL
);
226 spin_unlock(&ci
->i_ceph_lock
);
227 dout("renew caps %p want %s issued %s updating mds_wanted\n",
228 inode
, ceph_cap_string(wanted
), ceph_cap_string(issued
));
229 ceph_check_caps(ci
, 0, NULL
);
232 spin_unlock(&ci
->i_ceph_lock
);
235 if ((wanted
& CEPH_CAP_FILE_RD
) && (wanted
& CEPH_CAP_FILE_WR
))
237 else if (wanted
& CEPH_CAP_FILE_RD
)
239 else if (wanted
& CEPH_CAP_FILE_WR
)
242 if (wanted
& CEPH_CAP_FILE_LAZYIO
)
246 req
= prepare_open_request(inode
->i_sb
, flags
, 0);
252 req
->r_inode
= inode
;
257 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
258 ceph_mdsc_put_request(req
);
260 dout("renew caps %p open result=%d\n", inode
, err
);
261 return err
< 0 ? err
: 0;
265 * If we already have the requisite capabilities, we can satisfy
266 * the open request locally (no need to request new caps from the
267 * MDS). We do, however, need to inform the MDS (asynchronously)
268 * if our wanted caps set expands.
270 int ceph_open(struct inode
*inode
, struct file
*file
)
272 struct ceph_inode_info
*ci
= ceph_inode(inode
);
273 struct ceph_fs_client
*fsc
= ceph_sb_to_client(inode
->i_sb
);
274 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
275 struct ceph_mds_request
*req
;
276 struct ceph_file_info
*cf
= file
->private_data
;
278 int flags
, fmode
, wanted
;
281 dout("open file %p is already opened\n", file
);
285 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
286 flags
= file
->f_flags
& ~(O_CREAT
|O_EXCL
);
287 if (S_ISDIR(inode
->i_mode
))
288 flags
= O_DIRECTORY
; /* mds likes to know */
290 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode
,
291 ceph_vinop(inode
), file
, flags
, file
->f_flags
);
292 fmode
= ceph_flags_to_mode(flags
);
293 wanted
= ceph_caps_for_mode(fmode
);
295 /* snapped files are read-only */
296 if (ceph_snap(inode
) != CEPH_NOSNAP
&& (file
->f_mode
& FMODE_WRITE
))
299 /* trivially open snapdir */
300 if (ceph_snap(inode
) == CEPH_SNAPDIR
) {
301 spin_lock(&ci
->i_ceph_lock
);
302 __ceph_get_fmode(ci
, fmode
);
303 spin_unlock(&ci
->i_ceph_lock
);
304 return ceph_init_file(inode
, file
, fmode
);
308 * No need to block if we have caps on the auth MDS (for
309 * write) or any MDS (for read). Update wanted set
312 spin_lock(&ci
->i_ceph_lock
);
313 if (__ceph_is_any_real_caps(ci
) &&
314 (((fmode
& CEPH_FILE_MODE_WR
) == 0) || ci
->i_auth_cap
)) {
315 int mds_wanted
= __ceph_caps_mds_wanted(ci
, true);
316 int issued
= __ceph_caps_issued(ci
, NULL
);
318 dout("open %p fmode %d want %s issued %s using existing\n",
319 inode
, fmode
, ceph_cap_string(wanted
),
320 ceph_cap_string(issued
));
321 __ceph_get_fmode(ci
, fmode
);
322 spin_unlock(&ci
->i_ceph_lock
);
325 if ((issued
& wanted
) != wanted
&&
326 (mds_wanted
& wanted
) != wanted
&&
327 ceph_snap(inode
) != CEPH_SNAPDIR
)
328 ceph_check_caps(ci
, 0, NULL
);
330 return ceph_init_file(inode
, file
, fmode
);
331 } else if (ceph_snap(inode
) != CEPH_NOSNAP
&&
332 (ci
->i_snap_caps
& wanted
) == wanted
) {
333 __ceph_get_fmode(ci
, fmode
);
334 spin_unlock(&ci
->i_ceph_lock
);
335 return ceph_init_file(inode
, file
, fmode
);
338 spin_unlock(&ci
->i_ceph_lock
);
340 dout("open fmode %d wants %s\n", fmode
, ceph_cap_string(wanted
));
341 req
= prepare_open_request(inode
->i_sb
, flags
, 0);
346 req
->r_inode
= inode
;
350 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
352 err
= ceph_init_file(inode
, file
, req
->r_fmode
);
353 ceph_mdsc_put_request(req
);
354 dout("open result=%d on %llx.%llx\n", err
, ceph_vinop(inode
));
361 * Do a lookup + open with a single request. If we get a non-existent
362 * file or symlink, return 1 so the VFS can retry.
364 int ceph_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
365 struct file
*file
, unsigned flags
, umode_t mode
,
368 struct ceph_fs_client
*fsc
= ceph_sb_to_client(dir
->i_sb
);
369 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
370 struct ceph_mds_request
*req
;
372 struct ceph_acls_info acls
= {};
376 dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
378 d_unhashed(dentry
) ? "unhashed" : "hashed", flags
, mode
);
380 if (dentry
->d_name
.len
> NAME_MAX
)
381 return -ENAMETOOLONG
;
383 if (flags
& O_CREAT
) {
384 err
= ceph_pre_init_acls(dir
, &mode
, &acls
);
390 req
= prepare_open_request(dir
->i_sb
, flags
, mode
);
395 req
->r_dentry
= dget(dentry
);
397 if (flags
& O_CREAT
) {
398 req
->r_dentry_drop
= CEPH_CAP_FILE_SHARED
;
399 req
->r_dentry_unless
= CEPH_CAP_FILE_EXCL
;
401 req
->r_pagelist
= acls
.pagelist
;
402 acls
.pagelist
= NULL
;
406 mask
= CEPH_STAT_CAP_INODE
| CEPH_CAP_AUTH_SHARED
;
407 if (ceph_security_xattr_wanted(dir
))
408 mask
|= CEPH_CAP_XATTR_SHARED
;
409 req
->r_args
.open
.mask
= cpu_to_le32(mask
);
412 set_bit(CEPH_MDS_R_PARENT_LOCKED
, &req
->r_req_flags
);
413 err
= ceph_mdsc_do_request(mdsc
,
414 (flags
& (O_CREAT
|O_TRUNC
)) ? dir
: NULL
,
416 err
= ceph_handle_snapdir(req
, dentry
, err
);
420 if ((flags
& O_CREAT
) && !req
->r_reply_info
.head
->is_dentry
)
421 err
= ceph_handle_notrace_create(dir
, dentry
);
423 if (d_in_lookup(dentry
)) {
424 dn
= ceph_finish_lookup(req
, dentry
, err
);
428 /* we were given a hashed negative dentry */
433 if (dn
|| d_really_is_negative(dentry
) || d_is_symlink(dentry
)) {
434 /* make vfs retry on splice, ENOENT, or symlink */
435 dout("atomic_open finish_no_open on dn %p\n", dn
);
436 err
= finish_no_open(file
, dn
);
438 dout("atomic_open finish_open on dn %p\n", dn
);
439 if (req
->r_op
== CEPH_MDS_OP_CREATE
&& req
->r_reply_info
.has_create_ino
) {
440 ceph_init_inode_acls(d_inode(dentry
), &acls
);
441 *opened
|= FILE_CREATED
;
443 err
= finish_open(file
, dentry
, ceph_open
, opened
);
446 if (!req
->r_err
&& req
->r_target_inode
)
447 ceph_put_fmode(ceph_inode(req
->r_target_inode
), req
->r_fmode
);
448 ceph_mdsc_put_request(req
);
450 ceph_release_acls_info(&acls
);
451 dout("atomic_open result=%d\n", err
);
455 int ceph_release(struct inode
*inode
, struct file
*file
)
457 struct ceph_inode_info
*ci
= ceph_inode(inode
);
458 struct ceph_file_info
*cf
= file
->private_data
;
460 dout("release inode %p file %p\n", inode
, file
);
461 ceph_put_fmode(ci
, cf
->fmode
);
462 if (cf
->last_readdir
)
463 ceph_mdsc_put_request(cf
->last_readdir
);
464 kfree(cf
->last_name
);
466 kmem_cache_free(ceph_file_cachep
, cf
);
468 /* wake up anyone waiting for caps on this inode */
469 wake_up_all(&ci
->i_cap_wq
);
480 * Read a range of bytes striped over one or more objects. Iterate over
481 * objects we stripe over. (That's not atomic, but good enough for now.)
483 * If we get a short result from the OSD, check against i_size; we need to
484 * only return a short read to the caller if we hit EOF.
486 static int striped_read(struct inode
*inode
,
488 struct page
**pages
, int num_pages
,
489 int page_align
, int *checkeof
)
491 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
492 struct ceph_inode_info
*ci
= ceph_inode(inode
);
497 bool hit_stripe
, was_short
;
500 * we may need to do multiple reads. not atomic, unfortunately.
504 page_idx
= (page_align
+ read
) >> PAGE_SHIFT
;
505 ret
= ceph_osdc_readpages(&fsc
->client
->osdc
, ceph_vino(inode
),
506 &ci
->i_layout
, pos
, &this_len
,
507 ci
->i_truncate_seq
, ci
->i_truncate_size
,
508 pages
+ page_idx
, num_pages
- page_idx
,
509 ((page_align
+ read
) & ~PAGE_MASK
));
512 hit_stripe
= this_len
< len
;
513 was_short
= ret
>= 0 && ret
< this_len
;
514 dout("striped_read %llu~%llu (read %u) got %d%s%s\n", pos
, len
, read
,
515 ret
, hit_stripe
? " HITSTRIPE" : "", was_short
? " SHORT" : "");
517 i_size
= i_size_read(inode
);
519 if (was_short
&& (pos
+ ret
< i_size
)) {
520 int zlen
= min(this_len
- ret
, i_size
- pos
- ret
);
521 int zoff
= page_align
+ read
+ ret
;
522 dout(" zero gap %llu to %llu\n",
523 pos
+ ret
, pos
+ ret
+ zlen
);
524 ceph_zero_page_vector_range(zoff
, zlen
, pages
);
532 /* hit stripe and need continue*/
533 if (len
&& hit_stripe
&& pos
< i_size
)
539 /* did we bounce off eof? */
540 if (pos
+ len
> i_size
)
541 *checkeof
= CHECK_EOF
;
544 dout("striped_read returns %d\n", ret
);
549 * Completely synchronous read and write methods. Direct from __user
550 * buffer to osd, or directly to user pages (if O_DIRECT).
552 * If the read spans object boundary, just do multiple reads.
554 static ssize_t
ceph_sync_read(struct kiocb
*iocb
, struct iov_iter
*to
,
557 struct file
*file
= iocb
->ki_filp
;
558 struct inode
*inode
= file_inode(file
);
560 u64 off
= iocb
->ki_pos
;
563 size_t len
= iov_iter_count(to
);
565 dout("sync_read on file %p %llu~%u %s\n", file
, off
,
567 (file
->f_flags
& O_DIRECT
) ? "O_DIRECT" : "");
572 * flush any page cache pages in this range. this
573 * will make concurrent normal and sync io slow,
574 * but it will at least behave sensibly when they are
577 ret
= filemap_write_and_wait_range(inode
->i_mapping
, off
,
582 if (unlikely(to
->type
& ITER_PIPE
)) {
584 ret
= iov_iter_get_pages_alloc(to
, &pages
, len
,
588 num_pages
= DIV_ROUND_UP(ret
+ page_off
, PAGE_SIZE
);
590 ret
= striped_read(inode
, off
, ret
, pages
, num_pages
,
593 iov_iter_advance(to
, ret
);
596 iov_iter_advance(to
, 0);
598 ceph_put_page_vector(pages
, num_pages
, false);
600 num_pages
= calc_pages_for(off
, len
);
601 pages
= ceph_alloc_page_vector(num_pages
, GFP_KERNEL
);
603 return PTR_ERR(pages
);
605 ret
= striped_read(inode
, off
, len
, pages
, num_pages
,
606 (off
& ~PAGE_MASK
), checkeof
);
612 size_t page_off
= off
& ~PAGE_MASK
;
613 size_t copy
= min_t(size_t, left
,
614 PAGE_SIZE
- page_off
);
615 l
= copy_page_to_iter(pages
[k
++], page_off
,
623 ceph_release_page_vector(pages
, num_pages
);
626 if (off
> iocb
->ki_pos
) {
627 ret
= off
- iocb
->ki_pos
;
631 dout("sync_read result %zd\n", ret
);
635 struct ceph_aio_request
{
640 struct list_head osd_reqs
;
642 atomic_t pending_reqs
;
643 struct timespec mtime
;
644 struct ceph_cap_flush
*prealloc_cf
;
647 struct ceph_aio_work
{
648 struct work_struct work
;
649 struct ceph_osd_request
*req
;
652 static void ceph_aio_retry_work(struct work_struct
*work
);
654 static void ceph_aio_complete(struct inode
*inode
,
655 struct ceph_aio_request
*aio_req
)
657 struct ceph_inode_info
*ci
= ceph_inode(inode
);
660 if (!atomic_dec_and_test(&aio_req
->pending_reqs
))
663 ret
= aio_req
->error
;
665 ret
= aio_req
->total_len
;
667 dout("ceph_aio_complete %p rc %d\n", inode
, ret
);
669 if (ret
>= 0 && aio_req
->write
) {
672 loff_t endoff
= aio_req
->iocb
->ki_pos
+ aio_req
->total_len
;
673 if (endoff
> i_size_read(inode
)) {
674 if (ceph_inode_set_size(inode
, endoff
))
675 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
678 spin_lock(&ci
->i_ceph_lock
);
679 ci
->i_inline_version
= CEPH_INLINE_NONE
;
680 dirty
= __ceph_mark_dirty_caps(ci
, CEPH_CAP_FILE_WR
,
681 &aio_req
->prealloc_cf
);
682 spin_unlock(&ci
->i_ceph_lock
);
684 __mark_inode_dirty(inode
, dirty
);
688 ceph_put_cap_refs(ci
, (aio_req
->write
? CEPH_CAP_FILE_WR
:
691 aio_req
->iocb
->ki_complete(aio_req
->iocb
, ret
, 0);
693 ceph_free_cap_flush(aio_req
->prealloc_cf
);
697 static void ceph_aio_complete_req(struct ceph_osd_request
*req
)
699 int rc
= req
->r_result
;
700 struct inode
*inode
= req
->r_inode
;
701 struct ceph_aio_request
*aio_req
= req
->r_priv
;
702 struct ceph_osd_data
*osd_data
= osd_req_op_extent_osd_data(req
, 0);
703 int num_pages
= calc_pages_for((u64
)osd_data
->alignment
,
706 dout("ceph_aio_complete_req %p rc %d bytes %llu\n",
707 inode
, rc
, osd_data
->length
);
709 if (rc
== -EOLDSNAPC
) {
710 struct ceph_aio_work
*aio_work
;
711 BUG_ON(!aio_req
->write
);
713 aio_work
= kmalloc(sizeof(*aio_work
), GFP_NOFS
);
715 INIT_WORK(&aio_work
->work
, ceph_aio_retry_work
);
717 queue_work(ceph_inode_to_client(inode
)->wb_wq
,
722 } else if (!aio_req
->write
) {
725 if (rc
>= 0 && osd_data
->length
> rc
) {
726 int zoff
= osd_data
->alignment
+ rc
;
727 int zlen
= osd_data
->length
- rc
;
729 * If read is satisfied by single OSD request,
730 * it can pass EOF. Otherwise read is within
733 if (aio_req
->num_reqs
== 1) {
734 loff_t i_size
= i_size_read(inode
);
735 loff_t endoff
= aio_req
->iocb
->ki_pos
+ rc
;
737 zlen
= min_t(size_t, zlen
,
739 aio_req
->total_len
= rc
+ zlen
;
743 ceph_zero_page_vector_range(zoff
, zlen
,
748 ceph_put_page_vector(osd_data
->pages
, num_pages
, !aio_req
->write
);
749 ceph_osdc_put_request(req
);
752 cmpxchg(&aio_req
->error
, 0, rc
);
754 ceph_aio_complete(inode
, aio_req
);
758 static void ceph_aio_retry_work(struct work_struct
*work
)
760 struct ceph_aio_work
*aio_work
=
761 container_of(work
, struct ceph_aio_work
, work
);
762 struct ceph_osd_request
*orig_req
= aio_work
->req
;
763 struct ceph_aio_request
*aio_req
= orig_req
->r_priv
;
764 struct inode
*inode
= orig_req
->r_inode
;
765 struct ceph_inode_info
*ci
= ceph_inode(inode
);
766 struct ceph_snap_context
*snapc
;
767 struct ceph_osd_request
*req
;
770 spin_lock(&ci
->i_ceph_lock
);
771 if (__ceph_have_pending_cap_snap(ci
)) {
772 struct ceph_cap_snap
*capsnap
=
773 list_last_entry(&ci
->i_cap_snaps
,
774 struct ceph_cap_snap
,
776 snapc
= ceph_get_snap_context(capsnap
->context
);
778 BUG_ON(!ci
->i_head_snapc
);
779 snapc
= ceph_get_snap_context(ci
->i_head_snapc
);
781 spin_unlock(&ci
->i_ceph_lock
);
783 req
= ceph_osdc_alloc_request(orig_req
->r_osdc
, snapc
, 2,
791 req
->r_flags
= CEPH_OSD_FLAG_ORDERSNAP
| CEPH_OSD_FLAG_WRITE
;
792 ceph_oloc_copy(&req
->r_base_oloc
, &orig_req
->r_base_oloc
);
793 ceph_oid_copy(&req
->r_base_oid
, &orig_req
->r_base_oid
);
795 ret
= ceph_osdc_alloc_messages(req
, GFP_NOFS
);
797 ceph_osdc_put_request(req
);
802 req
->r_ops
[0] = orig_req
->r_ops
[0];
804 req
->r_mtime
= aio_req
->mtime
;
805 req
->r_data_offset
= req
->r_ops
[0].extent
.offset
;
807 ceph_osdc_put_request(orig_req
);
809 req
->r_callback
= ceph_aio_complete_req
;
810 req
->r_inode
= inode
;
811 req
->r_priv
= aio_req
;
812 req
->r_abort_on_full
= true;
814 ret
= ceph_osdc_start_request(req
->r_osdc
, req
, false);
818 ceph_aio_complete_req(req
);
821 ceph_put_snap_context(snapc
);
826 ceph_direct_read_write(struct kiocb
*iocb
, struct iov_iter
*iter
,
827 struct ceph_snap_context
*snapc
,
828 struct ceph_cap_flush
**pcf
)
830 struct file
*file
= iocb
->ki_filp
;
831 struct inode
*inode
= file_inode(file
);
832 struct ceph_inode_info
*ci
= ceph_inode(inode
);
833 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
834 struct ceph_vino vino
;
835 struct ceph_osd_request
*req
;
837 struct ceph_aio_request
*aio_req
= NULL
;
841 struct timespec mtime
= current_time(inode
);
842 size_t count
= iov_iter_count(iter
);
843 loff_t pos
= iocb
->ki_pos
;
844 bool write
= iov_iter_rw(iter
) == WRITE
;
846 if (write
&& ceph_snap(file_inode(file
)) != CEPH_NOSNAP
)
849 dout("sync_direct_read_write (%s) on file %p %lld~%u\n",
850 (write
? "write" : "read"), file
, pos
, (unsigned)count
);
852 ret
= filemap_write_and_wait_range(inode
->i_mapping
, pos
, pos
+ count
);
857 int ret2
= invalidate_inode_pages2_range(inode
->i_mapping
,
859 (pos
+ count
) >> PAGE_SHIFT
);
861 dout("invalidate_inode_pages2_range returned %d\n", ret2
);
863 flags
= CEPH_OSD_FLAG_ORDERSNAP
| CEPH_OSD_FLAG_WRITE
;
865 flags
= CEPH_OSD_FLAG_READ
;
868 while (iov_iter_count(iter
) > 0) {
869 u64 size
= dio_get_pagev_size(iter
);
873 vino
= ceph_vino(inode
);
874 req
= ceph_osdc_new_request(&fsc
->client
->osdc
, &ci
->i_layout
,
877 write
? CEPH_OSD_OP_WRITE
:
889 size
= min_t(u64
, size
, fsc
->mount_options
->wsize
);
891 size
= min_t(u64
, size
, fsc
->mount_options
->rsize
);
894 pages
= dio_get_pages_alloc(iter
, len
, &start
, &num_pages
);
896 ceph_osdc_put_request(req
);
897 ret
= PTR_ERR(pages
);
902 * To simplify error handling, allow AIO when IO within i_size
903 * or IO can be satisfied by single OSD request.
905 if (pos
== iocb
->ki_pos
&& !is_sync_kiocb(iocb
) &&
906 (len
== count
|| pos
+ count
<= i_size_read(inode
))) {
907 aio_req
= kzalloc(sizeof(*aio_req
), GFP_KERNEL
);
909 aio_req
->iocb
= iocb
;
910 aio_req
->write
= write
;
911 INIT_LIST_HEAD(&aio_req
->osd_reqs
);
913 aio_req
->mtime
= mtime
;
914 swap(aio_req
->prealloc_cf
, *pcf
);
922 * throw out any page cache pages in this range. this
925 truncate_inode_pages_range(inode
->i_mapping
, pos
,
926 (pos
+len
) | (PAGE_SIZE
- 1));
928 req
->r_mtime
= mtime
;
931 osd_req_op_extent_osd_data_pages(req
, 0, pages
, len
, start
,
935 aio_req
->total_len
+= len
;
937 atomic_inc(&aio_req
->pending_reqs
);
939 req
->r_callback
= ceph_aio_complete_req
;
940 req
->r_inode
= inode
;
941 req
->r_priv
= aio_req
;
942 list_add_tail(&req
->r_unsafe_item
, &aio_req
->osd_reqs
);
945 iov_iter_advance(iter
, len
);
949 ret
= ceph_osdc_start_request(req
->r_osdc
, req
, false);
951 ret
= ceph_osdc_wait_request(&fsc
->client
->osdc
, req
);
953 size
= i_size_read(inode
);
957 if (ret
>= 0 && ret
< len
&& pos
+ ret
< size
) {
958 int zlen
= min_t(size_t, len
- ret
,
960 ceph_zero_page_vector_range(start
+ ret
, zlen
,
968 ceph_put_page_vector(pages
, num_pages
, !write
);
970 ceph_osdc_put_request(req
);
975 iov_iter_advance(iter
, len
);
977 if (!write
&& pos
>= size
)
980 if (write
&& pos
> size
) {
981 if (ceph_inode_set_size(inode
, pos
))
982 ceph_check_caps(ceph_inode(inode
),
991 if (aio_req
->num_reqs
== 0) {
996 ceph_get_cap_refs(ci
, write
? CEPH_CAP_FILE_WR
:
999 list_splice(&aio_req
->osd_reqs
, &osd_reqs
);
1000 while (!list_empty(&osd_reqs
)) {
1001 req
= list_first_entry(&osd_reqs
,
1002 struct ceph_osd_request
,
1004 list_del_init(&req
->r_unsafe_item
);
1006 ret
= ceph_osdc_start_request(req
->r_osdc
,
1009 req
->r_result
= ret
;
1010 ceph_aio_complete_req(req
);
1013 return -EIOCBQUEUED
;
1016 if (ret
!= -EOLDSNAPC
&& pos
> iocb
->ki_pos
) {
1017 ret
= pos
- iocb
->ki_pos
;
1024 * Synchronous write, straight from __user pointer or user pages.
1026 * If write spans object boundary, just do multiple writes. (For a
1027 * correct atomic write, we should e.g. take write locks on all
1028 * objects, rollback on failure, etc.)
1031 ceph_sync_write(struct kiocb
*iocb
, struct iov_iter
*from
, loff_t pos
,
1032 struct ceph_snap_context
*snapc
)
1034 struct file
*file
= iocb
->ki_filp
;
1035 struct inode
*inode
= file_inode(file
);
1036 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1037 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1038 struct ceph_vino vino
;
1039 struct ceph_osd_request
*req
;
1040 struct page
**pages
;
1046 bool check_caps
= false;
1047 struct timespec mtime
= current_time(inode
);
1048 size_t count
= iov_iter_count(from
);
1050 if (ceph_snap(file_inode(file
)) != CEPH_NOSNAP
)
1053 dout("sync_write on file %p %lld~%u\n", file
, pos
, (unsigned)count
);
1055 ret
= filemap_write_and_wait_range(inode
->i_mapping
, pos
, pos
+ count
);
1059 ret
= invalidate_inode_pages2_range(inode
->i_mapping
,
1061 (pos
+ count
) >> PAGE_SHIFT
);
1063 dout("invalidate_inode_pages2_range returned %d\n", ret
);
1065 flags
= CEPH_OSD_FLAG_ORDERSNAP
| CEPH_OSD_FLAG_WRITE
;
1067 while ((len
= iov_iter_count(from
)) > 0) {
1071 vino
= ceph_vino(inode
);
1072 req
= ceph_osdc_new_request(&fsc
->client
->osdc
, &ci
->i_layout
,
1073 vino
, pos
, &len
, 0, 1,
1074 CEPH_OSD_OP_WRITE
, flags
, snapc
,
1076 ci
->i_truncate_size
,
1084 * write from beginning of first page,
1085 * regardless of io alignment
1087 num_pages
= (len
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1089 pages
= ceph_alloc_page_vector(num_pages
, GFP_KERNEL
);
1090 if (IS_ERR(pages
)) {
1091 ret
= PTR_ERR(pages
);
1096 for (n
= 0; n
< num_pages
; n
++) {
1097 size_t plen
= min_t(size_t, left
, PAGE_SIZE
);
1098 ret
= copy_page_from_iter(pages
[n
], 0, plen
, from
);
1107 ceph_release_page_vector(pages
, num_pages
);
1111 req
->r_inode
= inode
;
1113 osd_req_op_extent_osd_data_pages(req
, 0, pages
, len
, 0,
1116 req
->r_mtime
= mtime
;
1117 ret
= ceph_osdc_start_request(&fsc
->client
->osdc
, req
, false);
1119 ret
= ceph_osdc_wait_request(&fsc
->client
->osdc
, req
);
1122 ceph_osdc_put_request(req
);
1124 ceph_set_error_write(ci
);
1128 ceph_clear_error_write(ci
);
1131 if (pos
> i_size_read(inode
)) {
1132 check_caps
= ceph_inode_set_size(inode
, pos
);
1134 ceph_check_caps(ceph_inode(inode
),
1135 CHECK_CAPS_AUTHONLY
,
1141 if (ret
!= -EOLDSNAPC
&& written
> 0) {
1149 * Wrap generic_file_aio_read with checks for cap bits on the inode.
1150 * Atomically grab references, so that those bits are not released
1151 * back to the MDS mid-read.
1153 * Hmm, the sync read case isn't actually async... should it be?
1155 static ssize_t
ceph_read_iter(struct kiocb
*iocb
, struct iov_iter
*to
)
1157 struct file
*filp
= iocb
->ki_filp
;
1158 struct ceph_file_info
*fi
= filp
->private_data
;
1159 size_t len
= iov_iter_count(to
);
1160 struct inode
*inode
= file_inode(filp
);
1161 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1162 struct page
*pinned_page
= NULL
;
1165 int retry_op
= 0, read
= 0;
1168 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
1169 inode
, ceph_vinop(inode
), iocb
->ki_pos
, (unsigned)len
, inode
);
1171 if (fi
->fmode
& CEPH_FILE_MODE_LAZY
)
1172 want
= CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_LAZYIO
;
1174 want
= CEPH_CAP_FILE_CACHE
;
1175 ret
= ceph_get_caps(ci
, CEPH_CAP_FILE_RD
, want
, -1, &got
, &pinned_page
);
1179 if ((got
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) == 0 ||
1180 (iocb
->ki_flags
& IOCB_DIRECT
) ||
1181 (fi
->flags
& CEPH_F_SYNC
)) {
1183 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1184 inode
, ceph_vinop(inode
), iocb
->ki_pos
, (unsigned)len
,
1185 ceph_cap_string(got
));
1187 if (ci
->i_inline_version
== CEPH_INLINE_NONE
) {
1188 if (!retry_op
&& (iocb
->ki_flags
& IOCB_DIRECT
)) {
1189 ret
= ceph_direct_read_write(iocb
, to
,
1191 if (ret
>= 0 && ret
< len
)
1192 retry_op
= CHECK_EOF
;
1194 ret
= ceph_sync_read(iocb
, to
, &retry_op
);
1197 retry_op
= READ_INLINE
;
1200 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1201 inode
, ceph_vinop(inode
), iocb
->ki_pos
, (unsigned)len
,
1202 ceph_cap_string(got
));
1203 current
->journal_info
= filp
;
1204 ret
= generic_file_read_iter(iocb
, to
);
1205 current
->journal_info
= NULL
;
1207 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
1208 inode
, ceph_vinop(inode
), ceph_cap_string(got
), (int)ret
);
1210 put_page(pinned_page
);
1213 ceph_put_cap_refs(ci
, got
);
1214 if (retry_op
> HAVE_RETRIED
&& ret
>= 0) {
1216 struct page
*page
= NULL
;
1218 if (retry_op
== READ_INLINE
) {
1219 page
= __page_cache_alloc(GFP_KERNEL
);
1224 statret
= __ceph_do_getattr(inode
, page
,
1225 CEPH_STAT_CAP_INLINE_DATA
, !!page
);
1229 if (statret
== -ENODATA
) {
1230 BUG_ON(retry_op
!= READ_INLINE
);
1236 i_size
= i_size_read(inode
);
1237 if (retry_op
== READ_INLINE
) {
1238 BUG_ON(ret
> 0 || read
> 0);
1239 if (iocb
->ki_pos
< i_size
&&
1240 iocb
->ki_pos
< PAGE_SIZE
) {
1241 loff_t end
= min_t(loff_t
, i_size
,
1242 iocb
->ki_pos
+ len
);
1243 end
= min_t(loff_t
, end
, PAGE_SIZE
);
1245 zero_user_segment(page
, statret
, end
);
1246 ret
= copy_page_to_iter(page
,
1247 iocb
->ki_pos
& ~PAGE_MASK
,
1248 end
- iocb
->ki_pos
, to
);
1249 iocb
->ki_pos
+= ret
;
1252 if (iocb
->ki_pos
< i_size
&& read
< len
) {
1253 size_t zlen
= min_t(size_t, len
- read
,
1254 i_size
- iocb
->ki_pos
);
1255 ret
= iov_iter_zero(zlen
, to
);
1256 iocb
->ki_pos
+= ret
;
1259 __free_pages(page
, 0);
1263 /* hit EOF or hole? */
1264 if (retry_op
== CHECK_EOF
&& iocb
->ki_pos
< i_size
&&
1266 dout("sync_read hit hole, ppos %lld < size %lld"
1267 ", reading more\n", iocb
->ki_pos
, i_size
);
1271 retry_op
= HAVE_RETRIED
;
1283 * Take cap references to avoid releasing caps to MDS mid-write.
1285 * If we are synchronous, and write with an old snap context, the OSD
1286 * may return EOLDSNAPC. In that case, retry the write.. _after_
1287 * dropping our cap refs and allowing the pending snap to logically
1288 * complete _before_ this write occurs.
1290 * If we are near ENOSPC, write synchronously.
1292 static ssize_t
ceph_write_iter(struct kiocb
*iocb
, struct iov_iter
*from
)
1294 struct file
*file
= iocb
->ki_filp
;
1295 struct ceph_file_info
*fi
= file
->private_data
;
1296 struct inode
*inode
= file_inode(file
);
1297 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1298 struct ceph_osd_client
*osdc
=
1299 &ceph_sb_to_client(inode
->i_sb
)->client
->osdc
;
1300 struct ceph_cap_flush
*prealloc_cf
;
1301 ssize_t count
, written
= 0;
1305 if (ceph_snap(inode
) != CEPH_NOSNAP
)
1308 prealloc_cf
= ceph_alloc_cap_flush();
1315 /* We can write back this queue in page reclaim */
1316 current
->backing_dev_info
= inode_to_bdi(inode
);
1318 if (iocb
->ki_flags
& IOCB_APPEND
) {
1319 err
= ceph_do_getattr(inode
, CEPH_STAT_CAP_SIZE
, false);
1324 err
= generic_write_checks(iocb
, from
);
1329 count
= iov_iter_count(from
);
1330 err
= file_remove_privs(file
);
1334 err
= file_update_time(file
);
1338 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
) {
1339 err
= ceph_uninline_data(file
, NULL
);
1344 /* FIXME: not complete since it doesn't account for being at quota */
1345 if (ceph_osdmap_flag(osdc
, CEPH_OSDMAP_FULL
)) {
1350 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
1351 inode
, ceph_vinop(inode
), pos
, count
, i_size_read(inode
));
1352 if (fi
->fmode
& CEPH_FILE_MODE_LAZY
)
1353 want
= CEPH_CAP_FILE_BUFFER
| CEPH_CAP_FILE_LAZYIO
;
1355 want
= CEPH_CAP_FILE_BUFFER
;
1357 err
= ceph_get_caps(ci
, CEPH_CAP_FILE_WR
, want
, pos
+ count
,
1362 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
1363 inode
, ceph_vinop(inode
), pos
, count
, ceph_cap_string(got
));
1365 if ((got
& (CEPH_CAP_FILE_BUFFER
|CEPH_CAP_FILE_LAZYIO
)) == 0 ||
1366 (iocb
->ki_flags
& IOCB_DIRECT
) || (fi
->flags
& CEPH_F_SYNC
) ||
1367 (ci
->i_ceph_flags
& CEPH_I_ERROR_WRITE
)) {
1368 struct ceph_snap_context
*snapc
;
1369 struct iov_iter data
;
1370 inode_unlock(inode
);
1372 spin_lock(&ci
->i_ceph_lock
);
1373 if (__ceph_have_pending_cap_snap(ci
)) {
1374 struct ceph_cap_snap
*capsnap
=
1375 list_last_entry(&ci
->i_cap_snaps
,
1376 struct ceph_cap_snap
,
1378 snapc
= ceph_get_snap_context(capsnap
->context
);
1380 BUG_ON(!ci
->i_head_snapc
);
1381 snapc
= ceph_get_snap_context(ci
->i_head_snapc
);
1383 spin_unlock(&ci
->i_ceph_lock
);
1385 /* we might need to revert back to that point */
1387 if (iocb
->ki_flags
& IOCB_DIRECT
)
1388 written
= ceph_direct_read_write(iocb
, &data
, snapc
,
1391 written
= ceph_sync_write(iocb
, &data
, pos
, snapc
);
1393 iov_iter_advance(from
, written
);
1394 ceph_put_snap_context(snapc
);
1397 * No need to acquire the i_truncate_mutex. Because
1398 * the MDS revokes Fwb caps before sending truncate
1399 * message to us. We can't get Fwb cap while there
1400 * are pending vmtruncate. So write and vmtruncate
1401 * can not run at the same time
1403 written
= generic_perform_write(file
, from
, pos
);
1404 if (likely(written
>= 0))
1405 iocb
->ki_pos
= pos
+ written
;
1406 inode_unlock(inode
);
1411 spin_lock(&ci
->i_ceph_lock
);
1412 ci
->i_inline_version
= CEPH_INLINE_NONE
;
1413 dirty
= __ceph_mark_dirty_caps(ci
, CEPH_CAP_FILE_WR
,
1415 spin_unlock(&ci
->i_ceph_lock
);
1417 __mark_inode_dirty(inode
, dirty
);
1420 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
1421 inode
, ceph_vinop(inode
), pos
, (unsigned)count
,
1422 ceph_cap_string(got
));
1423 ceph_put_cap_refs(ci
, got
);
1425 if (written
== -EOLDSNAPC
) {
1426 dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",
1427 inode
, ceph_vinop(inode
), pos
, (unsigned)count
);
1432 if (ceph_osdmap_flag(osdc
, CEPH_OSDMAP_NEARFULL
))
1433 iocb
->ki_flags
|= IOCB_DSYNC
;
1434 written
= generic_write_sync(iocb
, written
);
1440 inode_unlock(inode
);
1442 ceph_free_cap_flush(prealloc_cf
);
1443 current
->backing_dev_info
= NULL
;
1444 return written
? written
: err
;
1448 * llseek. be sure to verify file size on SEEK_END.
1450 static loff_t
ceph_llseek(struct file
*file
, loff_t offset
, int whence
)
1452 struct inode
*inode
= file
->f_mapping
->host
;
1458 if (whence
== SEEK_END
|| whence
== SEEK_DATA
|| whence
== SEEK_HOLE
) {
1459 ret
= ceph_do_getattr(inode
, CEPH_STAT_CAP_SIZE
, false);
1464 i_size
= i_size_read(inode
);
1471 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1472 * position-querying operation. Avoid rewriting the "same"
1473 * f_pos value back to the file because a concurrent read(),
1474 * write() or lseek() might have altered it
1480 offset
+= file
->f_pos
;
1483 if (offset
>= i_size
) {
1489 if (offset
>= i_size
) {
1497 ret
= vfs_setpos(file
, offset
, inode
->i_sb
->s_maxbytes
);
1500 inode_unlock(inode
);
1504 static inline void ceph_zero_partial_page(
1505 struct inode
*inode
, loff_t offset
, unsigned size
)
1508 pgoff_t index
= offset
>> PAGE_SHIFT
;
1510 page
= find_lock_page(inode
->i_mapping
, index
);
1512 wait_on_page_writeback(page
);
1513 zero_user(page
, offset
& (PAGE_SIZE
- 1), size
);
1519 static void ceph_zero_pagecache_range(struct inode
*inode
, loff_t offset
,
1522 loff_t nearly
= round_up(offset
, PAGE_SIZE
);
1523 if (offset
< nearly
) {
1524 loff_t size
= nearly
- offset
;
1527 ceph_zero_partial_page(inode
, offset
, size
);
1531 if (length
>= PAGE_SIZE
) {
1532 loff_t size
= round_down(length
, PAGE_SIZE
);
1533 truncate_pagecache_range(inode
, offset
, offset
+ size
- 1);
1538 ceph_zero_partial_page(inode
, offset
, length
);
1541 static int ceph_zero_partial_object(struct inode
*inode
,
1542 loff_t offset
, loff_t
*length
)
1544 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1545 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
1546 struct ceph_osd_request
*req
;
1552 op
= offset
? CEPH_OSD_OP_DELETE
: CEPH_OSD_OP_TRUNCATE
;
1555 op
= CEPH_OSD_OP_ZERO
;
1558 req
= ceph_osdc_new_request(&fsc
->client
->osdc
, &ci
->i_layout
,
1562 CEPH_OSD_FLAG_WRITE
,
1569 req
->r_mtime
= inode
->i_mtime
;
1570 ret
= ceph_osdc_start_request(&fsc
->client
->osdc
, req
, false);
1572 ret
= ceph_osdc_wait_request(&fsc
->client
->osdc
, req
);
1576 ceph_osdc_put_request(req
);
1582 static int ceph_zero_objects(struct inode
*inode
, loff_t offset
, loff_t length
)
1585 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1586 s32 stripe_unit
= ci
->i_layout
.stripe_unit
;
1587 s32 stripe_count
= ci
->i_layout
.stripe_count
;
1588 s32 object_size
= ci
->i_layout
.object_size
;
1589 u64 object_set_size
= object_size
* stripe_count
;
1592 /* round offset up to next period boundary */
1593 nearly
= offset
+ object_set_size
- 1;
1595 nearly
-= do_div(t
, object_set_size
);
1597 while (length
&& offset
< nearly
) {
1598 loff_t size
= length
;
1599 ret
= ceph_zero_partial_object(inode
, offset
, &size
);
1605 while (length
>= object_set_size
) {
1607 loff_t pos
= offset
;
1608 for (i
= 0; i
< stripe_count
; ++i
) {
1609 ret
= ceph_zero_partial_object(inode
, pos
, NULL
);
1614 offset
+= object_set_size
;
1615 length
-= object_set_size
;
1618 loff_t size
= length
;
1619 ret
= ceph_zero_partial_object(inode
, offset
, &size
);
1628 static long ceph_fallocate(struct file
*file
, int mode
,
1629 loff_t offset
, loff_t length
)
1631 struct ceph_file_info
*fi
= file
->private_data
;
1632 struct inode
*inode
= file_inode(file
);
1633 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1634 struct ceph_osd_client
*osdc
=
1635 &ceph_inode_to_client(inode
)->client
->osdc
;
1636 struct ceph_cap_flush
*prealloc_cf
;
1643 if (mode
& ~(FALLOC_FL_KEEP_SIZE
| FALLOC_FL_PUNCH_HOLE
))
1646 if (!S_ISREG(inode
->i_mode
))
1649 prealloc_cf
= ceph_alloc_cap_flush();
1655 if (ceph_snap(inode
) != CEPH_NOSNAP
) {
1660 if (ceph_osdmap_flag(osdc
, CEPH_OSDMAP_FULL
) &&
1661 !(mode
& FALLOC_FL_PUNCH_HOLE
)) {
1666 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
) {
1667 ret
= ceph_uninline_data(file
, NULL
);
1672 size
= i_size_read(inode
);
1673 if (!(mode
& FALLOC_FL_KEEP_SIZE
)) {
1674 endoff
= offset
+ length
;
1675 ret
= inode_newsize_ok(inode
, endoff
);
1680 if (fi
->fmode
& CEPH_FILE_MODE_LAZY
)
1681 want
= CEPH_CAP_FILE_BUFFER
| CEPH_CAP_FILE_LAZYIO
;
1683 want
= CEPH_CAP_FILE_BUFFER
;
1685 ret
= ceph_get_caps(ci
, CEPH_CAP_FILE_WR
, want
, endoff
, &got
, NULL
);
1689 if (mode
& FALLOC_FL_PUNCH_HOLE
) {
1691 ceph_zero_pagecache_range(inode
, offset
, length
);
1692 ret
= ceph_zero_objects(inode
, offset
, length
);
1693 } else if (endoff
> size
) {
1694 truncate_pagecache_range(inode
, size
, -1);
1695 if (ceph_inode_set_size(inode
, endoff
))
1696 ceph_check_caps(ceph_inode(inode
),
1697 CHECK_CAPS_AUTHONLY
, NULL
);
1701 spin_lock(&ci
->i_ceph_lock
);
1702 ci
->i_inline_version
= CEPH_INLINE_NONE
;
1703 dirty
= __ceph_mark_dirty_caps(ci
, CEPH_CAP_FILE_WR
,
1705 spin_unlock(&ci
->i_ceph_lock
);
1707 __mark_inode_dirty(inode
, dirty
);
1710 ceph_put_cap_refs(ci
, got
);
1712 inode_unlock(inode
);
1713 ceph_free_cap_flush(prealloc_cf
);
1717 const struct file_operations ceph_file_fops
= {
1719 .release
= ceph_release
,
1720 .llseek
= ceph_llseek
,
1721 .read_iter
= ceph_read_iter
,
1722 .write_iter
= ceph_write_iter
,
1724 .fsync
= ceph_fsync
,
1726 .flock
= ceph_flock
,
1727 .splice_read
= generic_file_splice_read
,
1728 .splice_write
= iter_file_splice_write
,
1729 .unlocked_ioctl
= ceph_ioctl
,
1730 .compat_ioctl
= ceph_ioctl
,
1731 .fallocate
= ceph_fallocate
,