1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * File open, close, extend, truncate
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
26 #include <linux/capability.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/pagemap.h>
32 #include <linux/uio.h>
33 #include <linux/sched.h>
34 #include <linux/splice.h>
35 #include <linux/mount.h>
36 #include <linux/writeback.h>
38 #define MLOG_MASK_PREFIX ML_INODE
39 #include <cluster/masklog.h>
47 #include "extent_map.h"
57 #include "buffer_head_io.h"
59 static int ocfs2_sync_inode(struct inode
*inode
)
61 filemap_fdatawrite(inode
->i_mapping
);
62 return sync_mapping_buffers(inode
->i_mapping
);
65 static int ocfs2_file_open(struct inode
*inode
, struct file
*file
)
68 int mode
= file
->f_flags
;
69 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
71 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode
, file
,
72 file
->f_path
.dentry
->d_name
.len
, file
->f_path
.dentry
->d_name
.name
);
74 spin_lock(&oi
->ip_lock
);
76 /* Check that the inode hasn't been wiped from disk by another
77 * node. If it hasn't then we're safe as long as we hold the
78 * spin lock until our increment of open count. */
79 if (OCFS2_I(inode
)->ip_flags
& OCFS2_INODE_DELETED
) {
80 spin_unlock(&oi
->ip_lock
);
87 oi
->ip_flags
|= OCFS2_INODE_OPEN_DIRECT
;
90 spin_unlock(&oi
->ip_lock
);
97 static int ocfs2_file_release(struct inode
*inode
, struct file
*file
)
99 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
101 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode
, file
,
102 file
->f_path
.dentry
->d_name
.len
,
103 file
->f_path
.dentry
->d_name
.name
);
105 spin_lock(&oi
->ip_lock
);
106 if (!--oi
->ip_open_count
)
107 oi
->ip_flags
&= ~OCFS2_INODE_OPEN_DIRECT
;
108 spin_unlock(&oi
->ip_lock
);
115 static int ocfs2_sync_file(struct file
*file
,
116 struct dentry
*dentry
,
121 struct inode
*inode
= dentry
->d_inode
;
122 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
124 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file
, dentry
, datasync
,
125 dentry
->d_name
.len
, dentry
->d_name
.name
);
127 err
= ocfs2_sync_inode(dentry
->d_inode
);
131 journal
= osb
->journal
->j_journal
;
132 err
= journal_force_commit(journal
);
137 return (err
< 0) ? -EIO
: 0;
140 int ocfs2_should_update_atime(struct inode
*inode
,
141 struct vfsmount
*vfsmnt
)
144 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
146 if (ocfs2_is_hard_readonly(osb
) || ocfs2_is_soft_readonly(osb
))
149 if ((inode
->i_flags
& S_NOATIME
) ||
150 ((inode
->i_sb
->s_flags
& MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
154 * We can be called with no vfsmnt structure - NFSD will
157 * Note that our action here is different than touch_atime() -
158 * if we can't tell whether this is a noatime mount, then we
159 * don't know whether to trust the value of s_atime_quantum.
164 if ((vfsmnt
->mnt_flags
& MNT_NOATIME
) ||
165 ((vfsmnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
168 if (vfsmnt
->mnt_flags
& MNT_RELATIME
) {
169 if ((timespec_compare(&inode
->i_atime
, &inode
->i_mtime
) <= 0) ||
170 (timespec_compare(&inode
->i_atime
, &inode
->i_ctime
) <= 0))
177 if ((now
.tv_sec
- inode
->i_atime
.tv_sec
<= osb
->s_atime_quantum
))
183 int ocfs2_update_inode_atime(struct inode
*inode
,
184 struct buffer_head
*bh
)
187 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
192 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
193 if (handle
== NULL
) {
199 inode
->i_atime
= CURRENT_TIME
;
200 ret
= ocfs2_mark_inode_dirty(handle
, inode
, bh
);
204 ocfs2_commit_trans(OCFS2_SB(inode
->i_sb
), handle
);
210 static int ocfs2_set_inode_size(handle_t
*handle
,
212 struct buffer_head
*fe_bh
,
218 i_size_write(inode
, new_i_size
);
219 inode
->i_blocks
= ocfs2_inode_sector_count(inode
);
220 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
222 status
= ocfs2_mark_inode_dirty(handle
, inode
, fe_bh
);
233 static int ocfs2_simple_size_update(struct inode
*inode
,
234 struct buffer_head
*di_bh
,
238 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
239 handle_t
*handle
= NULL
;
241 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
242 if (handle
== NULL
) {
248 ret
= ocfs2_set_inode_size(handle
, inode
, di_bh
,
253 ocfs2_commit_trans(osb
, handle
);
258 static int ocfs2_orphan_for_truncate(struct ocfs2_super
*osb
,
260 struct buffer_head
*fe_bh
,
265 struct ocfs2_dinode
*di
;
270 /* TODO: This needs to actually orphan the inode in this
273 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
274 if (IS_ERR(handle
)) {
275 status
= PTR_ERR(handle
);
280 status
= ocfs2_journal_access(handle
, inode
, fe_bh
,
281 OCFS2_JOURNAL_ACCESS_WRITE
);
288 * Do this before setting i_size.
290 cluster_bytes
= ocfs2_align_bytes_to_clusters(inode
->i_sb
, new_i_size
);
291 status
= ocfs2_zero_range_for_truncate(inode
, handle
, new_i_size
,
298 i_size_write(inode
, new_i_size
);
299 inode
->i_blocks
= ocfs2_align_bytes_to_sectors(new_i_size
);
300 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
302 di
= (struct ocfs2_dinode
*) fe_bh
->b_data
;
303 di
->i_size
= cpu_to_le64(new_i_size
);
304 di
->i_ctime
= di
->i_mtime
= cpu_to_le64(inode
->i_ctime
.tv_sec
);
305 di
->i_ctime_nsec
= di
->i_mtime_nsec
= cpu_to_le32(inode
->i_ctime
.tv_nsec
);
307 status
= ocfs2_journal_dirty(handle
, fe_bh
);
312 ocfs2_commit_trans(osb
, handle
);
319 static int ocfs2_truncate_file(struct inode
*inode
,
320 struct buffer_head
*di_bh
,
324 struct ocfs2_dinode
*fe
= NULL
;
325 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
326 struct ocfs2_truncate_context
*tc
= NULL
;
328 mlog_entry("(inode = %llu, new_i_size = %llu\n",
329 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
330 (unsigned long long)new_i_size
);
332 fe
= (struct ocfs2_dinode
*) di_bh
->b_data
;
333 if (!OCFS2_IS_VALID_DINODE(fe
)) {
334 OCFS2_RO_ON_INVALID_DINODE(inode
->i_sb
, fe
);
339 mlog_bug_on_msg(le64_to_cpu(fe
->i_size
) != i_size_read(inode
),
340 "Inode %llu, inode i_size = %lld != di "
341 "i_size = %llu, i_flags = 0x%x\n",
342 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
344 (unsigned long long)le64_to_cpu(fe
->i_size
),
345 le32_to_cpu(fe
->i_flags
));
347 if (new_i_size
> le64_to_cpu(fe
->i_size
)) {
348 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
349 (unsigned long long)le64_to_cpu(fe
->i_size
),
350 (unsigned long long)new_i_size
);
356 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
357 (unsigned long long)le64_to_cpu(fe
->i_blkno
),
358 (unsigned long long)le64_to_cpu(fe
->i_size
),
359 (unsigned long long)new_i_size
);
361 /* lets handle the simple truncate cases before doing any more
362 * cluster locking. */
363 if (new_i_size
== le64_to_cpu(fe
->i_size
))
366 down_write(&OCFS2_I(inode
)->ip_alloc_sem
);
368 /* This forces other nodes to sync and drop their pages. Do
369 * this even if we have a truncate without allocation change -
370 * ocfs2 cluster sizes can be much greater than page size, so
371 * we have to truncate them anyway. */
372 status
= ocfs2_data_lock(inode
, 1);
374 up_write(&OCFS2_I(inode
)->ip_alloc_sem
);
380 unmap_mapping_range(inode
->i_mapping
, new_i_size
+ PAGE_SIZE
- 1, 0, 1);
381 truncate_inode_pages(inode
->i_mapping
, new_i_size
);
383 /* alright, we're going to need to do a full blown alloc size
384 * change. Orphan the inode so that recovery can complete the
385 * truncate if necessary. This does the task of marking
387 status
= ocfs2_orphan_for_truncate(osb
, inode
, di_bh
, new_i_size
);
390 goto bail_unlock_data
;
393 status
= ocfs2_prepare_truncate(osb
, inode
, di_bh
, &tc
);
396 goto bail_unlock_data
;
399 status
= ocfs2_commit_truncate(osb
, inode
, di_bh
, tc
);
402 goto bail_unlock_data
;
405 /* TODO: orphan dir cleanup here. */
407 ocfs2_data_unlock(inode
, 1);
409 up_write(&OCFS2_I(inode
)->ip_alloc_sem
);
418 * extend allocation only here.
419 * we'll update all the disk stuff, and oip->alloc_size
421 * expect stuff to be locked, a transaction started and enough data /
422 * metadata reservations in the contexts.
424 * Will return -EAGAIN, and a reason if a restart is needed.
425 * If passed in, *reason will always be set, even in error.
427 int ocfs2_do_extend_allocation(struct ocfs2_super
*osb
,
432 struct buffer_head
*fe_bh
,
434 struct ocfs2_alloc_context
*data_ac
,
435 struct ocfs2_alloc_context
*meta_ac
,
436 enum ocfs2_alloc_restarted
*reason_ret
)
440 struct ocfs2_dinode
*fe
= (struct ocfs2_dinode
*) fe_bh
->b_data
;
441 enum ocfs2_alloc_restarted reason
= RESTART_NONE
;
442 u32 bit_off
, num_bits
;
446 BUG_ON(!clusters_to_add
);
449 flags
= OCFS2_EXT_UNWRITTEN
;
451 free_extents
= ocfs2_num_free_extents(osb
, inode
, fe
);
452 if (free_extents
< 0) {
453 status
= free_extents
;
458 /* there are two cases which could cause us to EAGAIN in the
459 * we-need-more-metadata case:
460 * 1) we haven't reserved *any*
461 * 2) we are so fragmented, we've needed to add metadata too
463 if (!free_extents
&& !meta_ac
) {
464 mlog(0, "we haven't reserved any metadata!\n");
466 reason
= RESTART_META
;
468 } else if ((!free_extents
)
469 && (ocfs2_alloc_context_bits_left(meta_ac
)
470 < ocfs2_extend_meta_needed(fe
))) {
471 mlog(0, "filesystem is really fragmented...\n");
473 reason
= RESTART_META
;
477 status
= ocfs2_claim_clusters(osb
, handle
, data_ac
, 1,
478 &bit_off
, &num_bits
);
480 if (status
!= -ENOSPC
)
485 BUG_ON(num_bits
> clusters_to_add
);
487 /* reserve our write early -- insert_extent may update the inode */
488 status
= ocfs2_journal_access(handle
, inode
, fe_bh
,
489 OCFS2_JOURNAL_ACCESS_WRITE
);
495 block
= ocfs2_clusters_to_blocks(osb
->sb
, bit_off
);
496 mlog(0, "Allocating %u clusters at block %u for inode %llu\n",
497 num_bits
, bit_off
, (unsigned long long)OCFS2_I(inode
)->ip_blkno
);
498 status
= ocfs2_insert_extent(osb
, handle
, inode
, fe_bh
,
499 *logical_offset
, block
, num_bits
,
506 status
= ocfs2_journal_dirty(handle
, fe_bh
);
512 clusters_to_add
-= num_bits
;
513 *logical_offset
+= num_bits
;
515 if (clusters_to_add
) {
516 mlog(0, "need to alloc once more, clusters = %u, wanted = "
517 "%u\n", fe
->i_clusters
, clusters_to_add
);
519 reason
= RESTART_TRANS
;
525 *reason_ret
= reason
;
530 * For a given allocation, determine which allocators will need to be
531 * accessed, and lock them, reserving the appropriate number of bits.
533 * Sparse file systems call this from ocfs2_write_begin_nolock()
534 * and ocfs2_allocate_unwritten_extents().
536 * File systems which don't support holes call this from
537 * ocfs2_extend_allocation().
539 int ocfs2_lock_allocators(struct inode
*inode
, struct ocfs2_dinode
*di
,
540 u32 clusters_to_add
, u32 extents_to_split
,
541 struct ocfs2_alloc_context
**data_ac
,
542 struct ocfs2_alloc_context
**meta_ac
)
544 int ret
, num_free_extents
;
545 unsigned int max_recs_needed
= clusters_to_add
+ 2 * extents_to_split
;
546 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
551 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
552 "clusters_to_add = %u, extents_to_split = %u\n",
553 (unsigned long long)OCFS2_I(inode
)->ip_blkno
, i_size_read(inode
),
554 le32_to_cpu(di
->i_clusters
), clusters_to_add
, extents_to_split
);
556 num_free_extents
= ocfs2_num_free_extents(osb
, inode
, di
);
557 if (num_free_extents
< 0) {
558 ret
= num_free_extents
;
564 * Sparse allocation file systems need to be more conservative
565 * with reserving room for expansion - the actual allocation
566 * happens while we've got a journal handle open so re-taking
567 * a cluster lock (because we ran out of room for another
568 * extent) will violate ordering rules.
570 * Most of the time we'll only be seeing this 1 cluster at a time
573 * Always lock for any unwritten extents - we might want to
574 * add blocks during a split.
576 if (!num_free_extents
||
577 (ocfs2_sparse_alloc(osb
) && num_free_extents
< max_recs_needed
)) {
578 ret
= ocfs2_reserve_new_metadata(osb
, di
, meta_ac
);
586 ret
= ocfs2_reserve_clusters(osb
, clusters_to_add
, data_ac
);
596 ocfs2_free_alloc_context(*meta_ac
);
601 * We cannot have an error and a non null *data_ac.
608 static int __ocfs2_extend_allocation(struct inode
*inode
, u32 logical_start
,
609 u32 clusters_to_add
, int mark_unwritten
)
612 int restart_func
= 0;
615 struct buffer_head
*bh
= NULL
;
616 struct ocfs2_dinode
*fe
= NULL
;
617 handle_t
*handle
= NULL
;
618 struct ocfs2_alloc_context
*data_ac
= NULL
;
619 struct ocfs2_alloc_context
*meta_ac
= NULL
;
620 enum ocfs2_alloc_restarted why
;
621 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
623 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add
);
626 * This function only exists for file systems which don't
629 BUG_ON(mark_unwritten
&& !ocfs2_sparse_alloc(osb
));
631 status
= ocfs2_read_block(osb
, OCFS2_I(inode
)->ip_blkno
, &bh
,
632 OCFS2_BH_CACHED
, inode
);
638 fe
= (struct ocfs2_dinode
*) bh
->b_data
;
639 if (!OCFS2_IS_VALID_DINODE(fe
)) {
640 OCFS2_RO_ON_INVALID_DINODE(inode
->i_sb
, fe
);
646 BUG_ON(le32_to_cpu(fe
->i_clusters
) != OCFS2_I(inode
)->ip_clusters
);
648 status
= ocfs2_lock_allocators(inode
, fe
, clusters_to_add
, 0, &data_ac
,
655 credits
= ocfs2_calc_extend_credits(osb
->sb
, fe
, clusters_to_add
);
656 handle
= ocfs2_start_trans(osb
, credits
);
657 if (IS_ERR(handle
)) {
658 status
= PTR_ERR(handle
);
664 restarted_transaction
:
665 /* reserve a write to the file entry early on - that we if we
666 * run out of credits in the allocation path, we can still
668 status
= ocfs2_journal_access(handle
, inode
, bh
,
669 OCFS2_JOURNAL_ACCESS_WRITE
);
675 prev_clusters
= OCFS2_I(inode
)->ip_clusters
;
677 status
= ocfs2_do_extend_allocation(osb
,
687 if ((status
< 0) && (status
!= -EAGAIN
)) {
688 if (status
!= -ENOSPC
)
693 status
= ocfs2_journal_dirty(handle
, bh
);
699 spin_lock(&OCFS2_I(inode
)->ip_lock
);
700 clusters_to_add
-= (OCFS2_I(inode
)->ip_clusters
- prev_clusters
);
701 spin_unlock(&OCFS2_I(inode
)->ip_lock
);
703 if (why
!= RESTART_NONE
&& clusters_to_add
) {
704 if (why
== RESTART_META
) {
705 mlog(0, "restarting function.\n");
708 BUG_ON(why
!= RESTART_TRANS
);
710 mlog(0, "restarting transaction.\n");
711 /* TODO: This can be more intelligent. */
712 credits
= ocfs2_calc_extend_credits(osb
->sb
,
715 status
= ocfs2_extend_trans(handle
, credits
);
717 /* handle still has to be committed at
723 goto restarted_transaction
;
727 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
728 le32_to_cpu(fe
->i_clusters
),
729 (unsigned long long)le64_to_cpu(fe
->i_size
));
730 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
731 OCFS2_I(inode
)->ip_clusters
, i_size_read(inode
));
735 ocfs2_commit_trans(osb
, handle
);
739 ocfs2_free_alloc_context(data_ac
);
743 ocfs2_free_alloc_context(meta_ac
);
746 if ((!status
) && restart_func
) {
759 static int ocfs2_extend_allocation(struct inode
*inode
, u32 logical_start
,
760 u32 clusters_to_add
, int mark_unwritten
)
765 * The alloc sem blocks peope in read/write from reading our
766 * allocation until we're done changing it. We depend on
767 * i_mutex to block other extend/truncate calls while we're
770 down_write(&OCFS2_I(inode
)->ip_alloc_sem
);
771 ret
= __ocfs2_extend_allocation(inode
, logical_start
, clusters_to_add
,
773 up_write(&OCFS2_I(inode
)->ip_alloc_sem
);
778 /* Some parts of this taken from generic_cont_expand, which turned out
779 * to be too fragile to do exactly what we need without us having to
780 * worry about recursive locking in ->prepare_write() and
781 * ->commit_write(). */
782 static int ocfs2_write_zero_page(struct inode
*inode
,
785 struct address_space
*mapping
= inode
->i_mapping
;
789 handle_t
*handle
= NULL
;
792 offset
= (size
& (PAGE_CACHE_SIZE
-1)); /* Within page */
793 /* ugh. in prepare/commit_write, if from==to==start of block, we
794 ** skip the prepare. make sure we never send an offset for the start
797 if ((offset
& (inode
->i_sb
->s_blocksize
- 1)) == 0) {
800 index
= size
>> PAGE_CACHE_SHIFT
;
802 page
= grab_cache_page(mapping
, index
);
809 ret
= ocfs2_prepare_write_nolock(inode
, page
, offset
, offset
);
815 if (ocfs2_should_order_data(inode
)) {
816 handle
= ocfs2_start_walk_page_trans(inode
, page
, offset
,
818 if (IS_ERR(handle
)) {
819 ret
= PTR_ERR(handle
);
825 /* must not update i_size! */
826 ret
= block_commit_write(page
, offset
, offset
);
833 ocfs2_commit_trans(OCFS2_SB(inode
->i_sb
), handle
);
836 page_cache_release(page
);
841 static int ocfs2_zero_extend(struct inode
*inode
,
846 struct super_block
*sb
= inode
->i_sb
;
848 start_off
= ocfs2_align_bytes_to_blocks(sb
, i_size_read(inode
));
849 while (start_off
< zero_to_size
) {
850 ret
= ocfs2_write_zero_page(inode
, start_off
);
856 start_off
+= sb
->s_blocksize
;
859 * Very large extends have the potential to lock up
860 * the cpu for extended periods of time.
870 * A tail_to_skip value > 0 indicates that we're being called from
871 * ocfs2_file_aio_write(). This has the following implications:
873 * - we don't want to update i_size
874 * - di_bh will be NULL, which is fine because it's only used in the
875 * case where we want to update i_size.
876 * - ocfs2_zero_extend() will then only be filling the hole created
877 * between i_size and the start of the write.
879 static int ocfs2_extend_file(struct inode
*inode
,
880 struct buffer_head
*di_bh
,
885 u32 clusters_to_add
= 0;
887 BUG_ON(!tail_to_skip
&& !di_bh
);
889 /* setattr sometimes calls us like this. */
893 if (i_size_read(inode
) == new_i_size
)
895 BUG_ON(new_i_size
< i_size_read(inode
));
897 if (ocfs2_sparse_alloc(OCFS2_SB(inode
->i_sb
))) {
898 BUG_ON(tail_to_skip
!= 0);
899 goto out_update_size
;
902 clusters_to_add
= ocfs2_clusters_for_bytes(inode
->i_sb
, new_i_size
) -
903 OCFS2_I(inode
)->ip_clusters
;
906 * protect the pages that ocfs2_zero_extend is going to be
907 * pulling into the page cache.. we do this before the
908 * metadata extend so that we don't get into the situation
909 * where we've extended the metadata but can't get the data
912 ret
= ocfs2_data_lock(inode
, 1);
918 if (clusters_to_add
) {
919 ret
= ocfs2_extend_allocation(inode
,
920 OCFS2_I(inode
)->ip_clusters
,
929 * Call this even if we don't add any clusters to the tree. We
930 * still need to zero the area between the old i_size and the
933 ret
= ocfs2_zero_extend(inode
, (u64
)new_i_size
- tail_to_skip
);
941 /* We're being called from ocfs2_setattr() which wants
942 * us to update i_size */
943 ret
= ocfs2_simple_size_update(inode
, di_bh
, new_i_size
);
949 if (!ocfs2_sparse_alloc(OCFS2_SB(inode
->i_sb
)))
950 ocfs2_data_unlock(inode
, 1);
956 int ocfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
958 int status
= 0, size_change
;
959 struct inode
*inode
= dentry
->d_inode
;
960 struct super_block
*sb
= inode
->i_sb
;
961 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
962 struct buffer_head
*bh
= NULL
;
963 handle_t
*handle
= NULL
;
965 mlog_entry("(0x%p, '%.*s')\n", dentry
,
966 dentry
->d_name
.len
, dentry
->d_name
.name
);
968 if (attr
->ia_valid
& ATTR_MODE
)
969 mlog(0, "mode change: %d\n", attr
->ia_mode
);
970 if (attr
->ia_valid
& ATTR_UID
)
971 mlog(0, "uid change: %d\n", attr
->ia_uid
);
972 if (attr
->ia_valid
& ATTR_GID
)
973 mlog(0, "gid change: %d\n", attr
->ia_gid
);
974 if (attr
->ia_valid
& ATTR_SIZE
)
975 mlog(0, "size change...\n");
976 if (attr
->ia_valid
& (ATTR_ATIME
| ATTR_MTIME
| ATTR_CTIME
))
977 mlog(0, "time change...\n");
979 #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
980 | ATTR_GID | ATTR_UID | ATTR_MODE)
981 if (!(attr
->ia_valid
& OCFS2_VALID_ATTRS
)) {
982 mlog(0, "can't handle attrs: 0x%x\n", attr
->ia_valid
);
986 status
= inode_change_ok(inode
, attr
);
990 size_change
= S_ISREG(inode
->i_mode
) && attr
->ia_valid
& ATTR_SIZE
;
992 status
= ocfs2_rw_lock(inode
, 1);
999 status
= ocfs2_meta_lock(inode
, &bh
, 1);
1001 if (status
!= -ENOENT
)
1003 goto bail_unlock_rw
;
1006 if (size_change
&& attr
->ia_size
!= i_size_read(inode
)) {
1007 if (i_size_read(inode
) > attr
->ia_size
)
1008 status
= ocfs2_truncate_file(inode
, bh
, attr
->ia_size
);
1010 status
= ocfs2_extend_file(inode
, bh
, attr
->ia_size
, 0);
1012 if (status
!= -ENOSPC
)
1019 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1020 if (IS_ERR(handle
)) {
1021 status
= PTR_ERR(handle
);
1027 * This will intentionally not wind up calling vmtruncate(),
1028 * since all the work for a size change has been done above.
1029 * Otherwise, we could get into problems with truncate as
1030 * ip_alloc_sem is used there to protect against i_size
1033 status
= inode_setattr(inode
, attr
);
1039 status
= ocfs2_mark_inode_dirty(handle
, inode
, bh
);
1044 ocfs2_commit_trans(osb
, handle
);
1046 ocfs2_meta_unlock(inode
, 1);
1049 ocfs2_rw_unlock(inode
, 1);
1058 int ocfs2_getattr(struct vfsmount
*mnt
,
1059 struct dentry
*dentry
,
1062 struct inode
*inode
= dentry
->d_inode
;
1063 struct super_block
*sb
= dentry
->d_inode
->i_sb
;
1064 struct ocfs2_super
*osb
= sb
->s_fs_info
;
1069 err
= ocfs2_inode_revalidate(dentry
);
1076 generic_fillattr(inode
, stat
);
1078 /* We set the blksize from the cluster size for performance */
1079 stat
->blksize
= osb
->s_clustersize
;
1087 int ocfs2_permission(struct inode
*inode
, int mask
, struct nameidata
*nd
)
1093 ret
= ocfs2_meta_lock(inode
, NULL
, 0);
1100 ret
= generic_permission(inode
, mask
, NULL
);
1102 ocfs2_meta_unlock(inode
, 0);
1108 static int ocfs2_write_remove_suid(struct inode
*inode
)
1111 struct buffer_head
*bh
= NULL
;
1112 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
1114 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1115 struct ocfs2_dinode
*di
;
1117 mlog_entry("(Inode %llu, mode 0%o)\n",
1118 (unsigned long long)oi
->ip_blkno
, inode
->i_mode
);
1120 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1121 if (handle
== NULL
) {
1127 ret
= ocfs2_read_block(osb
, oi
->ip_blkno
, &bh
, OCFS2_BH_CACHED
, inode
);
1133 ret
= ocfs2_journal_access(handle
, inode
, bh
,
1134 OCFS2_JOURNAL_ACCESS_WRITE
);
1140 inode
->i_mode
&= ~S_ISUID
;
1141 if ((inode
->i_mode
& S_ISGID
) && (inode
->i_mode
& S_IXGRP
))
1142 inode
->i_mode
&= ~S_ISGID
;
1144 di
= (struct ocfs2_dinode
*) bh
->b_data
;
1145 di
->i_mode
= cpu_to_le16(inode
->i_mode
);
1147 ret
= ocfs2_journal_dirty(handle
, bh
);
1153 ocfs2_commit_trans(osb
, handle
);
1160 * Will look for holes and unwritten extents in the range starting at
1161 * pos for count bytes (inclusive).
1163 static int ocfs2_check_range_for_holes(struct inode
*inode
, loff_t pos
,
1167 unsigned int extent_flags
;
1168 u32 cpos
, clusters
, extent_len
, phys_cpos
;
1169 struct super_block
*sb
= inode
->i_sb
;
1171 cpos
= pos
>> OCFS2_SB(sb
)->s_clustersize_bits
;
1172 clusters
= ocfs2_clusters_for_bytes(sb
, pos
+ count
) - cpos
;
1175 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
, &extent_len
,
1182 if (phys_cpos
== 0 || (extent_flags
& OCFS2_EXT_UNWRITTEN
)) {
1187 if (extent_len
> clusters
)
1188 extent_len
= clusters
;
1190 clusters
-= extent_len
;
1198 * Allocate enough extents to cover the region starting at byte offset
1199 * start for len bytes. Existing extents are skipped, any extents
1200 * added are marked as "unwritten".
1202 static int ocfs2_allocate_unwritten_extents(struct inode
*inode
,
1206 u32 cpos
, phys_cpos
, clusters
, alloc_size
;
1209 * We consider both start and len to be inclusive.
1211 cpos
= start
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
1212 clusters
= ocfs2_clusters_for_bytes(inode
->i_sb
, start
+ len
);
1216 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
,
1224 * Hole or existing extent len can be arbitrary, so
1225 * cap it to our own allocation request.
1227 if (alloc_size
> clusters
)
1228 alloc_size
= clusters
;
1232 * We already have an allocation at this
1233 * region so we can safely skip it.
1238 ret
= __ocfs2_extend_allocation(inode
, cpos
, alloc_size
, 1);
1247 clusters
-= alloc_size
;
1255 static int ocfs2_prepare_inode_for_write(struct dentry
*dentry
,
1261 int ret
= 0, meta_level
= appending
;
1262 struct inode
*inode
= dentry
->d_inode
;
1264 loff_t newsize
, saved_pos
;
1267 * We sample i_size under a read level meta lock to see if our write
1268 * is extending the file, if it is we back off and get a write level
1272 ret
= ocfs2_meta_lock(inode
, NULL
, meta_level
);
1279 /* Clear suid / sgid if necessary. We do this here
1280 * instead of later in the write path because
1281 * remove_suid() calls ->setattr without any hint that
1282 * we may have already done our cluster locking. Since
1283 * ocfs2_setattr() *must* take cluster locks to
1284 * proceeed, this will lead us to recursively lock the
1285 * inode. There's also the dinode i_size state which
1286 * can be lost via setattr during extending writes (we
1287 * set inode->i_size at the end of a write. */
1288 if (should_remove_suid(dentry
)) {
1289 if (meta_level
== 0) {
1290 ocfs2_meta_unlock(inode
, meta_level
);
1295 ret
= ocfs2_write_remove_suid(inode
);
1302 /* work on a copy of ppos until we're sure that we won't have
1303 * to recalculate it due to relocking. */
1305 saved_pos
= i_size_read(inode
);
1306 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos
);
1311 if (ocfs2_sparse_alloc(OCFS2_SB(inode
->i_sb
))) {
1312 loff_t end
= saved_pos
+ count
;
1315 * Skip the O_DIRECT checks if we don't need
1318 if (!direct_io
|| !(*direct_io
))
1322 * Allowing concurrent direct writes means
1323 * i_size changes wouldn't be synchronized, so
1324 * one node could wind up truncating another
1327 if (end
> i_size_read(inode
)) {
1333 * We don't fill holes during direct io, so
1334 * check for them here. If any are found, the
1335 * caller will have to retake some cluster
1336 * locks and initiate the io as buffered.
1338 ret
= ocfs2_check_range_for_holes(inode
, saved_pos
,
1349 * The rest of this loop is concerned with legacy file
1350 * systems which don't support sparse files.
1353 newsize
= count
+ saved_pos
;
1355 mlog(0, "pos=%lld newsize=%lld cursize=%lld\n",
1356 (long long) saved_pos
, (long long) newsize
,
1357 (long long) i_size_read(inode
));
1359 /* No need for a higher level metadata lock if we're
1360 * never going past i_size. */
1361 if (newsize
<= i_size_read(inode
))
1364 if (meta_level
== 0) {
1365 ocfs2_meta_unlock(inode
, meta_level
);
1370 spin_lock(&OCFS2_I(inode
)->ip_lock
);
1371 clusters
= ocfs2_clusters_for_bytes(inode
->i_sb
, newsize
) -
1372 OCFS2_I(inode
)->ip_clusters
;
1373 spin_unlock(&OCFS2_I(inode
)->ip_lock
);
1375 mlog(0, "Writing at EOF, may need more allocation: "
1376 "i_size = %lld, newsize = %lld, need %u clusters\n",
1377 (long long) i_size_read(inode
), (long long) newsize
,
1380 /* We only want to continue the rest of this loop if
1381 * our extend will actually require more
1386 ret
= ocfs2_extend_file(inode
, NULL
, newsize
, count
);
1399 ocfs2_meta_unlock(inode
, meta_level
);
1406 ocfs2_set_next_iovec(const struct iovec
**iovp
, size_t *basep
, size_t bytes
)
1408 const struct iovec
*iov
= *iovp
;
1409 size_t base
= *basep
;
1412 int copy
= min(bytes
, iov
->iov_len
- base
);
1416 if (iov
->iov_len
== base
) {
1425 static struct page
* ocfs2_get_write_source(char **ret_src_buf
,
1426 const struct iovec
*cur_iov
,
1430 char *buf
= cur_iov
->iov_base
+ iov_offset
;
1431 struct page
*src_page
= NULL
;
1434 off
= (unsigned long)(buf
) & ~PAGE_CACHE_MASK
;
1436 if (!segment_eq(get_fs(), KERNEL_DS
)) {
1438 * Pull in the user page. We want to do this outside
1439 * of the meta data locks in order to preserve locking
1440 * order in case of page fault.
1442 ret
= get_user_pages(current
, current
->mm
,
1443 (unsigned long)buf
& PAGE_CACHE_MASK
, 1,
1444 0, 0, &src_page
, NULL
);
1446 *ret_src_buf
= kmap(src_page
) + off
;
1448 src_page
= ERR_PTR(-EFAULT
);
1456 static void ocfs2_put_write_source(struct page
*page
)
1460 page_cache_release(page
);
1464 static ssize_t
ocfs2_file_buffered_write(struct file
*file
, loff_t
*ppos
,
1465 const struct iovec
*iov
,
1466 unsigned long nr_segs
,
1468 ssize_t o_direct_written
)
1471 ssize_t copied
, total
= 0;
1472 size_t iov_offset
= 0, bytes
;
1474 const struct iovec
*cur_iov
= iov
;
1475 struct page
*user_page
, *page
;
1480 * handle partial DIO write. Adjust cur_iov if needed.
1482 ocfs2_set_next_iovec(&cur_iov
, &iov_offset
, o_direct_written
);
1487 user_page
= ocfs2_get_write_source(&buf
, cur_iov
, iov_offset
);
1488 if (IS_ERR(user_page
)) {
1489 ret
= PTR_ERR(user_page
);
1493 /* Stay within our page boundaries */
1494 bytes
= min((PAGE_CACHE_SIZE
- ((unsigned long)pos
& ~PAGE_CACHE_MASK
)),
1495 (PAGE_CACHE_SIZE
- ((unsigned long)buf
& ~PAGE_CACHE_MASK
)));
1496 /* Stay within the vector boundary */
1497 bytes
= min_t(size_t, bytes
, cur_iov
->iov_len
- iov_offset
);
1498 /* Stay within count */
1499 bytes
= min(bytes
, count
);
1502 ret
= ocfs2_write_begin(file
, file
->f_mapping
, pos
, bytes
, 0,
1509 dst
= kmap_atomic(page
, KM_USER0
);
1510 memcpy(dst
+ (pos
& (PAGE_CACHE_SIZE
- 1)), buf
, bytes
);
1511 kunmap_atomic(dst
, KM_USER0
);
1512 flush_dcache_page(page
);
1513 ocfs2_put_write_source(user_page
);
1515 copied
= ocfs2_write_end(file
, file
->f_mapping
, pos
, bytes
,
1516 bytes
, page
, fsdata
);
1524 *ppos
= pos
+ copied
;
1527 ocfs2_set_next_iovec(&cur_iov
, &iov_offset
, copied
);
1531 return total
? total
: ret
;
1534 static ssize_t
ocfs2_file_aio_write(struct kiocb
*iocb
,
1535 const struct iovec
*iov
,
1536 unsigned long nr_segs
,
1539 int ret
, direct_io
, appending
, rw_level
, have_alloc_sem
= 0;
1540 int can_do_direct
, sync
= 0;
1541 ssize_t written
= 0;
1542 size_t ocount
; /* original count */
1543 size_t count
; /* after file limit checks */
1544 loff_t
*ppos
= &iocb
->ki_pos
;
1545 struct file
*file
= iocb
->ki_filp
;
1546 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1548 mlog_entry("(0x%p, %u, '%.*s')\n", file
,
1549 (unsigned int)nr_segs
,
1550 file
->f_path
.dentry
->d_name
.len
,
1551 file
->f_path
.dentry
->d_name
.name
);
1553 if (iocb
->ki_left
== 0)
1556 ret
= generic_segment_checks(iov
, &nr_segs
, &ocount
, VERIFY_READ
);
1562 vfs_check_frozen(inode
->i_sb
, SB_FREEZE_WRITE
);
1564 appending
= file
->f_flags
& O_APPEND
? 1 : 0;
1565 direct_io
= file
->f_flags
& O_DIRECT
? 1 : 0;
1567 mutex_lock(&inode
->i_mutex
);
1570 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
1572 down_read(&inode
->i_alloc_sem
);
1576 /* concurrent O_DIRECT writes are allowed */
1577 rw_level
= !direct_io
;
1578 ret
= ocfs2_rw_lock(inode
, rw_level
);
1584 can_do_direct
= direct_io
;
1585 ret
= ocfs2_prepare_inode_for_write(file
->f_path
.dentry
, ppos
,
1586 iocb
->ki_left
, appending
,
1594 * We can't complete the direct I/O as requested, fall back to
1597 if (direct_io
&& !can_do_direct
) {
1598 ocfs2_rw_unlock(inode
, rw_level
);
1599 up_read(&inode
->i_alloc_sem
);
1609 if (!sync
&& ((file
->f_flags
& O_SYNC
) || IS_SYNC(inode
)))
1613 * XXX: Is it ok to execute these checks a second time?
1615 ret
= generic_write_checks(file
, ppos
, &count
, S_ISBLK(inode
->i_mode
));
1620 * Set pos so that sync_page_range_nolock() below understands
1621 * where to start from. We might've moved it around via the
1622 * calls above. The range we want to actually sync starts from
1628 /* communicate with ocfs2_dio_end_io */
1629 ocfs2_iocb_set_rw_locked(iocb
, rw_level
);
1632 written
= generic_file_direct_write(iocb
, iov
, &nr_segs
, *ppos
,
1633 ppos
, count
, ocount
);
1639 written
= ocfs2_file_buffered_write(file
, ppos
, iov
, nr_segs
,
1643 if (ret
!= -EFAULT
|| ret
!= -ENOSPC
)
1650 /* buffered aio wouldn't have proper lock coverage today */
1651 BUG_ON(ret
== -EIOCBQUEUED
&& !(file
->f_flags
& O_DIRECT
));
1654 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
1655 * function pointer which is called when o_direct io completes so that
1656 * it can unlock our rw lock. (it's the clustered equivalent of
1657 * i_alloc_sem; protects truncate from racing with pending ios).
1658 * Unfortunately there are error cases which call end_io and others
1659 * that don't. so we don't have to unlock the rw_lock if either an
1660 * async dio is going to do it in the future or an end_io after an
1661 * error has already done it.
1663 if (ret
== -EIOCBQUEUED
|| !ocfs2_iocb_is_rw_locked(iocb
)) {
1670 ocfs2_rw_unlock(inode
, rw_level
);
1674 up_read(&inode
->i_alloc_sem
);
1676 if (written
> 0 && sync
) {
1679 err
= sync_page_range_nolock(inode
, file
->f_mapping
, pos
, count
);
1684 mutex_unlock(&inode
->i_mutex
);
1687 return written
? written
: ret
;
1690 static int ocfs2_splice_write_actor(struct pipe_inode_info
*pipe
,
1691 struct pipe_buffer
*buf
,
1692 struct splice_desc
*sd
)
1696 struct file
*file
= sd
->u
.file
;
1697 unsigned int offset
;
1698 struct page
*page
= NULL
;
1702 ret
= buf
->ops
->confirm(pipe
, buf
);
1706 offset
= sd
->pos
& ~PAGE_CACHE_MASK
;
1708 if (count
+ offset
> PAGE_CACHE_SIZE
)
1709 count
= PAGE_CACHE_SIZE
- offset
;
1711 ret
= ocfs2_write_begin(file
, file
->f_mapping
, sd
->pos
, count
, 0,
1718 src
= buf
->ops
->map(pipe
, buf
, 1);
1719 dst
= kmap_atomic(page
, KM_USER1
);
1720 memcpy(dst
+ offset
, src
+ buf
->offset
, count
);
1721 kunmap_atomic(page
, KM_USER1
);
1722 buf
->ops
->unmap(pipe
, buf
, src
);
1724 copied
= ocfs2_write_end(file
, file
->f_mapping
, sd
->pos
, count
, count
,
1733 return copied
? copied
: ret
;
1736 static ssize_t
__ocfs2_file_splice_write(struct pipe_inode_info
*pipe
,
1743 struct address_space
*mapping
= out
->f_mapping
;
1744 struct inode
*inode
= mapping
->host
;
1745 struct splice_desc sd
= {
1752 ret
= __splice_from_pipe(pipe
, &sd
, ocfs2_splice_write_actor
);
1756 if (unlikely((out
->f_flags
& O_SYNC
) || IS_SYNC(inode
))) {
1757 err
= generic_osync_inode(inode
, mapping
,
1758 OSYNC_METADATA
|OSYNC_DATA
);
1767 static ssize_t
ocfs2_file_splice_write(struct pipe_inode_info
*pipe
,
1774 struct inode
*inode
= out
->f_path
.dentry
->d_inode
;
1776 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out
, pipe
,
1778 out
->f_path
.dentry
->d_name
.len
,
1779 out
->f_path
.dentry
->d_name
.name
);
1781 inode_double_lock(inode
, pipe
->inode
);
1783 ret
= ocfs2_rw_lock(inode
, 1);
1789 ret
= ocfs2_prepare_inode_for_write(out
->f_path
.dentry
, ppos
, len
, 0,
1796 /* ok, we're done with i_size and alloc work */
1797 ret
= __ocfs2_file_splice_write(pipe
, out
, ppos
, len
, flags
);
1800 ocfs2_rw_unlock(inode
, 1);
1802 inode_double_unlock(inode
, pipe
->inode
);
1808 static ssize_t
ocfs2_file_splice_read(struct file
*in
,
1810 struct pipe_inode_info
*pipe
,
1815 struct inode
*inode
= in
->f_path
.dentry
->d_inode
;
1817 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in
, pipe
,
1819 in
->f_path
.dentry
->d_name
.len
,
1820 in
->f_path
.dentry
->d_name
.name
);
1823 * See the comment in ocfs2_file_aio_read()
1825 ret
= ocfs2_meta_lock(inode
, NULL
, 0);
1830 ocfs2_meta_unlock(inode
, 0);
1832 ret
= generic_file_splice_read(in
, ppos
, pipe
, len
, flags
);
1839 static ssize_t
ocfs2_file_aio_read(struct kiocb
*iocb
,
1840 const struct iovec
*iov
,
1841 unsigned long nr_segs
,
1844 int ret
= 0, rw_level
= -1, have_alloc_sem
= 0, lock_level
= 0;
1845 struct file
*filp
= iocb
->ki_filp
;
1846 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1848 mlog_entry("(0x%p, %u, '%.*s')\n", filp
,
1849 (unsigned int)nr_segs
,
1850 filp
->f_path
.dentry
->d_name
.len
,
1851 filp
->f_path
.dentry
->d_name
.name
);
1860 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
1861 * need locks to protect pending reads from racing with truncate.
1863 if (filp
->f_flags
& O_DIRECT
) {
1864 down_read(&inode
->i_alloc_sem
);
1867 ret
= ocfs2_rw_lock(inode
, 0);
1873 /* communicate with ocfs2_dio_end_io */
1874 ocfs2_iocb_set_rw_locked(iocb
, rw_level
);
1878 * We're fine letting folks race truncates and extending
1879 * writes with read across the cluster, just like they can
1880 * locally. Hence no rw_lock during read.
1882 * Take and drop the meta data lock to update inode fields
1883 * like i_size. This allows the checks down below
1884 * generic_file_aio_read() a chance of actually working.
1886 ret
= ocfs2_meta_lock_atime(inode
, filp
->f_vfsmnt
, &lock_level
);
1891 ocfs2_meta_unlock(inode
, lock_level
);
1893 ret
= generic_file_aio_read(iocb
, iov
, nr_segs
, iocb
->ki_pos
);
1895 mlog(ML_ERROR
, "generic_file_aio_read returned -EINVAL\n");
1897 /* buffered aio wouldn't have proper lock coverage today */
1898 BUG_ON(ret
== -EIOCBQUEUED
&& !(filp
->f_flags
& O_DIRECT
));
1900 /* see ocfs2_file_aio_write */
1901 if (ret
== -EIOCBQUEUED
|| !ocfs2_iocb_is_rw_locked(iocb
)) {
1908 up_read(&inode
->i_alloc_sem
);
1910 ocfs2_rw_unlock(inode
, rw_level
);
1916 const struct inode_operations ocfs2_file_iops
= {
1917 .setattr
= ocfs2_setattr
,
1918 .getattr
= ocfs2_getattr
,
1919 .permission
= ocfs2_permission
,
1922 const struct inode_operations ocfs2_special_file_iops
= {
1923 .setattr
= ocfs2_setattr
,
1924 .getattr
= ocfs2_getattr
,
1925 .permission
= ocfs2_permission
,
1928 const struct file_operations ocfs2_fops
= {
1929 .read
= do_sync_read
,
1930 .write
= do_sync_write
,
1932 .fsync
= ocfs2_sync_file
,
1933 .release
= ocfs2_file_release
,
1934 .open
= ocfs2_file_open
,
1935 .aio_read
= ocfs2_file_aio_read
,
1936 .aio_write
= ocfs2_file_aio_write
,
1937 .ioctl
= ocfs2_ioctl
,
1938 #ifdef CONFIG_COMPAT
1939 .compat_ioctl
= ocfs2_compat_ioctl
,
1941 .splice_read
= ocfs2_file_splice_read
,
1942 .splice_write
= ocfs2_file_splice_write
,
1945 const struct file_operations ocfs2_dops
= {
1946 .read
= generic_read_dir
,
1947 .readdir
= ocfs2_readdir
,
1948 .fsync
= ocfs2_sync_file
,
1949 .ioctl
= ocfs2_ioctl
,
1950 #ifdef CONFIG_COMPAT
1951 .compat_ioctl
= ocfs2_compat_ioctl
,