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>
37 #include <linux/falloc.h>
38 #include <linux/quotaops.h>
39 #include <linux/blkdev.h>
41 #include <cluster/masklog.h>
49 #include "extent_map.h"
62 #include "refcounttree.h"
63 #include "ocfs2_trace.h"
65 #include "buffer_head_io.h"
67 static int ocfs2_init_file_private(struct inode
*inode
, struct file
*file
)
69 struct ocfs2_file_private
*fp
;
71 fp
= kzalloc(sizeof(struct ocfs2_file_private
), GFP_KERNEL
);
76 mutex_init(&fp
->fp_mutex
);
77 ocfs2_file_lock_res_init(&fp
->fp_flock
, fp
);
78 file
->private_data
= fp
;
83 static void ocfs2_free_file_private(struct inode
*inode
, struct file
*file
)
85 struct ocfs2_file_private
*fp
= file
->private_data
;
86 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
89 ocfs2_simple_drop_lockres(osb
, &fp
->fp_flock
);
90 ocfs2_lock_res_free(&fp
->fp_flock
);
92 file
->private_data
= NULL
;
96 static int ocfs2_file_open(struct inode
*inode
, struct file
*file
)
99 int mode
= file
->f_flags
;
100 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
102 trace_ocfs2_file_open(inode
, file
, file
->f_path
.dentry
,
103 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
104 file
->f_path
.dentry
->d_name
.len
,
105 file
->f_path
.dentry
->d_name
.name
, mode
);
107 if (file
->f_mode
& FMODE_WRITE
)
108 dquot_initialize(inode
);
110 spin_lock(&oi
->ip_lock
);
112 /* Check that the inode hasn't been wiped from disk by another
113 * node. If it hasn't then we're safe as long as we hold the
114 * spin lock until our increment of open count. */
115 if (OCFS2_I(inode
)->ip_flags
& OCFS2_INODE_DELETED
) {
116 spin_unlock(&oi
->ip_lock
);
123 oi
->ip_flags
|= OCFS2_INODE_OPEN_DIRECT
;
126 spin_unlock(&oi
->ip_lock
);
128 status
= ocfs2_init_file_private(inode
, file
);
131 * We want to set open count back if we're failing the
134 spin_lock(&oi
->ip_lock
);
136 spin_unlock(&oi
->ip_lock
);
143 static int ocfs2_file_release(struct inode
*inode
, struct file
*file
)
145 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
147 spin_lock(&oi
->ip_lock
);
148 if (!--oi
->ip_open_count
)
149 oi
->ip_flags
&= ~OCFS2_INODE_OPEN_DIRECT
;
151 trace_ocfs2_file_release(inode
, file
, file
->f_path
.dentry
,
153 file
->f_path
.dentry
->d_name
.len
,
154 file
->f_path
.dentry
->d_name
.name
,
156 spin_unlock(&oi
->ip_lock
);
158 ocfs2_free_file_private(inode
, file
);
163 static int ocfs2_dir_open(struct inode
*inode
, struct file
*file
)
165 return ocfs2_init_file_private(inode
, file
);
168 static int ocfs2_dir_release(struct inode
*inode
, struct file
*file
)
170 ocfs2_free_file_private(inode
, file
);
174 static int ocfs2_sync_file(struct file
*file
, loff_t start
, loff_t end
,
179 struct inode
*inode
= file
->f_mapping
->host
;
180 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
182 trace_ocfs2_sync_file(inode
, file
, file
->f_path
.dentry
,
183 OCFS2_I(inode
)->ip_blkno
,
184 file
->f_path
.dentry
->d_name
.len
,
185 file
->f_path
.dentry
->d_name
.name
,
186 (unsigned long long)datasync
);
188 err
= filemap_write_and_wait_range(inode
->i_mapping
, start
, end
);
193 * Probably don't need the i_mutex at all in here, just putting it here
194 * to be consistent with how fsync used to be called, someone more
195 * familiar with the fs could possibly remove it.
197 mutex_lock(&inode
->i_mutex
);
198 if (datasync
&& !(inode
->i_state
& I_DIRTY_DATASYNC
)) {
200 * We still have to flush drive's caches to get data to the
203 if (osb
->s_mount_opt
& OCFS2_MOUNT_BARRIER
)
204 blkdev_issue_flush(inode
->i_sb
->s_bdev
, GFP_KERNEL
, NULL
);
208 journal
= osb
->journal
->j_journal
;
209 err
= jbd2_journal_force_commit(journal
);
214 mutex_unlock(&inode
->i_mutex
);
216 return (err
< 0) ? -EIO
: 0;
219 int ocfs2_should_update_atime(struct inode
*inode
,
220 struct vfsmount
*vfsmnt
)
223 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
225 if (ocfs2_is_hard_readonly(osb
) || ocfs2_is_soft_readonly(osb
))
228 if ((inode
->i_flags
& S_NOATIME
) ||
229 ((inode
->i_sb
->s_flags
& MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
233 * We can be called with no vfsmnt structure - NFSD will
236 * Note that our action here is different than touch_atime() -
237 * if we can't tell whether this is a noatime mount, then we
238 * don't know whether to trust the value of s_atime_quantum.
243 if ((vfsmnt
->mnt_flags
& MNT_NOATIME
) ||
244 ((vfsmnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
247 if (vfsmnt
->mnt_flags
& MNT_RELATIME
) {
248 if ((timespec_compare(&inode
->i_atime
, &inode
->i_mtime
) <= 0) ||
249 (timespec_compare(&inode
->i_atime
, &inode
->i_ctime
) <= 0))
256 if ((now
.tv_sec
- inode
->i_atime
.tv_sec
<= osb
->s_atime_quantum
))
262 int ocfs2_update_inode_atime(struct inode
*inode
,
263 struct buffer_head
*bh
)
266 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
268 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*) bh
->b_data
;
270 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
271 if (IS_ERR(handle
)) {
272 ret
= PTR_ERR(handle
);
277 ret
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), bh
,
278 OCFS2_JOURNAL_ACCESS_WRITE
);
285 * Don't use ocfs2_mark_inode_dirty() here as we don't always
286 * have i_mutex to guard against concurrent changes to other
289 inode
->i_atime
= CURRENT_TIME
;
290 di
->i_atime
= cpu_to_le64(inode
->i_atime
.tv_sec
);
291 di
->i_atime_nsec
= cpu_to_le32(inode
->i_atime
.tv_nsec
);
292 ocfs2_journal_dirty(handle
, bh
);
295 ocfs2_commit_trans(OCFS2_SB(inode
->i_sb
), handle
);
300 static int ocfs2_set_inode_size(handle_t
*handle
,
302 struct buffer_head
*fe_bh
,
307 i_size_write(inode
, new_i_size
);
308 inode
->i_blocks
= ocfs2_inode_sector_count(inode
);
309 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
311 status
= ocfs2_mark_inode_dirty(handle
, inode
, fe_bh
);
321 int ocfs2_simple_size_update(struct inode
*inode
,
322 struct buffer_head
*di_bh
,
326 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
327 handle_t
*handle
= NULL
;
329 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
330 if (IS_ERR(handle
)) {
331 ret
= PTR_ERR(handle
);
336 ret
= ocfs2_set_inode_size(handle
, inode
, di_bh
,
341 ocfs2_commit_trans(osb
, handle
);
346 static int ocfs2_cow_file_pos(struct inode
*inode
,
347 struct buffer_head
*fe_bh
,
351 u32 phys
, cpos
= offset
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
352 unsigned int num_clusters
= 0;
353 unsigned int ext_flags
= 0;
356 * If the new offset is aligned to the range of the cluster, there is
357 * no space for ocfs2_zero_range_for_truncate to fill, so no need to
360 if ((offset
& (OCFS2_SB(inode
->i_sb
)->s_clustersize
- 1)) == 0)
363 status
= ocfs2_get_clusters(inode
, cpos
, &phys
,
364 &num_clusters
, &ext_flags
);
370 if (!(ext_flags
& OCFS2_EXT_REFCOUNTED
))
373 return ocfs2_refcount_cow(inode
, fe_bh
, cpos
, 1, cpos
+1);
379 static int ocfs2_orphan_for_truncate(struct ocfs2_super
*osb
,
381 struct buffer_head
*fe_bh
,
386 struct ocfs2_dinode
*di
;
390 * We need to CoW the cluster contains the offset if it is reflinked
391 * since we will call ocfs2_zero_range_for_truncate later which will
392 * write "0" from offset to the end of the cluster.
394 status
= ocfs2_cow_file_pos(inode
, fe_bh
, new_i_size
);
400 /* TODO: This needs to actually orphan the inode in this
403 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
404 if (IS_ERR(handle
)) {
405 status
= PTR_ERR(handle
);
410 status
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), fe_bh
,
411 OCFS2_JOURNAL_ACCESS_WRITE
);
418 * Do this before setting i_size.
420 cluster_bytes
= ocfs2_align_bytes_to_clusters(inode
->i_sb
, new_i_size
);
421 status
= ocfs2_zero_range_for_truncate(inode
, handle
, new_i_size
,
428 i_size_write(inode
, new_i_size
);
429 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
431 di
= (struct ocfs2_dinode
*) fe_bh
->b_data
;
432 di
->i_size
= cpu_to_le64(new_i_size
);
433 di
->i_ctime
= di
->i_mtime
= cpu_to_le64(inode
->i_ctime
.tv_sec
);
434 di
->i_ctime_nsec
= di
->i_mtime_nsec
= cpu_to_le32(inode
->i_ctime
.tv_nsec
);
436 ocfs2_journal_dirty(handle
, fe_bh
);
439 ocfs2_commit_trans(osb
, handle
);
444 static int ocfs2_truncate_file(struct inode
*inode
,
445 struct buffer_head
*di_bh
,
449 struct ocfs2_dinode
*fe
= NULL
;
450 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
452 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
453 * already validated it */
454 fe
= (struct ocfs2_dinode
*) di_bh
->b_data
;
456 trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode
)->ip_blkno
,
457 (unsigned long long)le64_to_cpu(fe
->i_size
),
458 (unsigned long long)new_i_size
);
460 mlog_bug_on_msg(le64_to_cpu(fe
->i_size
) != i_size_read(inode
),
461 "Inode %llu, inode i_size = %lld != di "
462 "i_size = %llu, i_flags = 0x%x\n",
463 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
465 (unsigned long long)le64_to_cpu(fe
->i_size
),
466 le32_to_cpu(fe
->i_flags
));
468 if (new_i_size
> le64_to_cpu(fe
->i_size
)) {
469 trace_ocfs2_truncate_file_error(
470 (unsigned long long)le64_to_cpu(fe
->i_size
),
471 (unsigned long long)new_i_size
);
477 /* lets handle the simple truncate cases before doing any more
478 * cluster locking. */
479 if (new_i_size
== le64_to_cpu(fe
->i_size
))
482 down_write(&OCFS2_I(inode
)->ip_alloc_sem
);
484 ocfs2_resv_discard(&osb
->osb_la_resmap
,
485 &OCFS2_I(inode
)->ip_la_data_resv
);
488 * The inode lock forced other nodes to sync and drop their
489 * pages, which (correctly) happens even if we have a truncate
490 * without allocation change - ocfs2 cluster sizes can be much
491 * greater than page size, so we have to truncate them
494 unmap_mapping_range(inode
->i_mapping
, new_i_size
+ PAGE_SIZE
- 1, 0, 1);
495 truncate_inode_pages(inode
->i_mapping
, new_i_size
);
497 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
498 status
= ocfs2_truncate_inline(inode
, di_bh
, new_i_size
,
499 i_size_read(inode
), 1);
503 goto bail_unlock_sem
;
506 /* alright, we're going to need to do a full blown alloc size
507 * change. Orphan the inode so that recovery can complete the
508 * truncate if necessary. This does the task of marking
510 status
= ocfs2_orphan_for_truncate(osb
, inode
, di_bh
, new_i_size
);
513 goto bail_unlock_sem
;
516 status
= ocfs2_commit_truncate(osb
, inode
, di_bh
);
519 goto bail_unlock_sem
;
522 /* TODO: orphan dir cleanup here. */
524 up_write(&OCFS2_I(inode
)->ip_alloc_sem
);
527 if (!status
&& OCFS2_I(inode
)->ip_clusters
== 0)
528 status
= ocfs2_try_remove_refcount_tree(inode
, di_bh
);
534 * extend file allocation only here.
535 * we'll update all the disk stuff, and oip->alloc_size
537 * expect stuff to be locked, a transaction started and enough data /
538 * metadata reservations in the contexts.
540 * Will return -EAGAIN, and a reason if a restart is needed.
541 * If passed in, *reason will always be set, even in error.
543 int ocfs2_add_inode_data(struct ocfs2_super
*osb
,
548 struct buffer_head
*fe_bh
,
550 struct ocfs2_alloc_context
*data_ac
,
551 struct ocfs2_alloc_context
*meta_ac
,
552 enum ocfs2_alloc_restarted
*reason_ret
)
555 struct ocfs2_extent_tree et
;
557 ocfs2_init_dinode_extent_tree(&et
, INODE_CACHE(inode
), fe_bh
);
558 ret
= ocfs2_add_clusters_in_btree(handle
, &et
, logical_offset
,
559 clusters_to_add
, mark_unwritten
,
560 data_ac
, meta_ac
, reason_ret
);
565 static int __ocfs2_extend_allocation(struct inode
*inode
, u32 logical_start
,
566 u32 clusters_to_add
, int mark_unwritten
)
569 int restart_func
= 0;
572 struct buffer_head
*bh
= NULL
;
573 struct ocfs2_dinode
*fe
= NULL
;
574 handle_t
*handle
= NULL
;
575 struct ocfs2_alloc_context
*data_ac
= NULL
;
576 struct ocfs2_alloc_context
*meta_ac
= NULL
;
577 enum ocfs2_alloc_restarted why
;
578 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
579 struct ocfs2_extent_tree et
;
583 * Unwritten extent only exists for file systems which
586 BUG_ON(mark_unwritten
&& !ocfs2_sparse_alloc(osb
));
588 status
= ocfs2_read_inode_block(inode
, &bh
);
593 fe
= (struct ocfs2_dinode
*) bh
->b_data
;
596 BUG_ON(le32_to_cpu(fe
->i_clusters
) != OCFS2_I(inode
)->ip_clusters
);
598 ocfs2_init_dinode_extent_tree(&et
, INODE_CACHE(inode
), bh
);
599 status
= ocfs2_lock_allocators(inode
, &et
, clusters_to_add
, 0,
606 credits
= ocfs2_calc_extend_credits(osb
->sb
, &fe
->id2
.i_list
);
607 handle
= ocfs2_start_trans(osb
, credits
);
608 if (IS_ERR(handle
)) {
609 status
= PTR_ERR(handle
);
615 restarted_transaction
:
616 trace_ocfs2_extend_allocation(
617 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
618 (unsigned long long)i_size_read(inode
),
619 le32_to_cpu(fe
->i_clusters
), clusters_to_add
,
622 status
= dquot_alloc_space_nodirty(inode
,
623 ocfs2_clusters_to_bytes(osb
->sb
, clusters_to_add
));
628 /* reserve a write to the file entry early on - that we if we
629 * run out of credits in the allocation path, we can still
631 status
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), bh
,
632 OCFS2_JOURNAL_ACCESS_WRITE
);
638 prev_clusters
= OCFS2_I(inode
)->ip_clusters
;
640 status
= ocfs2_add_inode_data(osb
,
650 if ((status
< 0) && (status
!= -EAGAIN
)) {
651 if (status
!= -ENOSPC
)
656 ocfs2_journal_dirty(handle
, bh
);
658 spin_lock(&OCFS2_I(inode
)->ip_lock
);
659 clusters_to_add
-= (OCFS2_I(inode
)->ip_clusters
- prev_clusters
);
660 spin_unlock(&OCFS2_I(inode
)->ip_lock
);
661 /* Release unused quota reservation */
662 dquot_free_space(inode
,
663 ocfs2_clusters_to_bytes(osb
->sb
, clusters_to_add
));
666 if (why
!= RESTART_NONE
&& clusters_to_add
) {
667 if (why
== RESTART_META
) {
671 BUG_ON(why
!= RESTART_TRANS
);
673 status
= ocfs2_allocate_extend_trans(handle
, 1);
675 /* handle still has to be committed at
681 goto restarted_transaction
;
685 trace_ocfs2_extend_allocation_end(OCFS2_I(inode
)->ip_blkno
,
686 le32_to_cpu(fe
->i_clusters
),
687 (unsigned long long)le64_to_cpu(fe
->i_size
),
688 OCFS2_I(inode
)->ip_clusters
,
689 (unsigned long long)i_size_read(inode
));
692 if (status
< 0 && did_quota
)
693 dquot_free_space(inode
,
694 ocfs2_clusters_to_bytes(osb
->sb
, clusters_to_add
));
696 ocfs2_commit_trans(osb
, handle
);
700 ocfs2_free_alloc_context(data_ac
);
704 ocfs2_free_alloc_context(meta_ac
);
707 if ((!status
) && restart_func
) {
718 * While a write will already be ordering the data, a truncate will not.
719 * Thus, we need to explicitly order the zeroed pages.
721 static handle_t
*ocfs2_zero_start_ordered_transaction(struct inode
*inode
)
723 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
724 handle_t
*handle
= NULL
;
727 if (!ocfs2_should_order_data(inode
))
730 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
731 if (IS_ERR(handle
)) {
737 ret
= ocfs2_jbd2_file_inode(handle
, inode
);
744 ocfs2_commit_trans(osb
, handle
);
745 handle
= ERR_PTR(ret
);
750 /* Some parts of this taken from generic_cont_expand, which turned out
751 * to be too fragile to do exactly what we need without us having to
752 * worry about recursive locking in ->write_begin() and ->write_end(). */
753 static int ocfs2_write_zero_page(struct inode
*inode
, u64 abs_from
,
756 struct address_space
*mapping
= inode
->i_mapping
;
758 unsigned long index
= abs_from
>> PAGE_CACHE_SHIFT
;
759 handle_t
*handle
= NULL
;
761 unsigned zero_from
, zero_to
, block_start
, block_end
;
763 BUG_ON(abs_from
>= abs_to
);
764 BUG_ON(abs_to
> (((u64
)index
+ 1) << PAGE_CACHE_SHIFT
));
765 BUG_ON(abs_from
& (inode
->i_blkbits
- 1));
767 page
= find_or_create_page(mapping
, index
, GFP_NOFS
);
774 /* Get the offsets within the page that we want to zero */
775 zero_from
= abs_from
& (PAGE_CACHE_SIZE
- 1);
776 zero_to
= abs_to
& (PAGE_CACHE_SIZE
- 1);
778 zero_to
= PAGE_CACHE_SIZE
;
780 trace_ocfs2_write_zero_page(
781 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
782 (unsigned long long)abs_from
,
783 (unsigned long long)abs_to
,
784 index
, zero_from
, zero_to
);
786 /* We know that zero_from is block aligned */
787 for (block_start
= zero_from
; block_start
< zero_to
;
788 block_start
= block_end
) {
789 block_end
= block_start
+ (1 << inode
->i_blkbits
);
792 * block_start is block-aligned. Bump it by one to force
793 * __block_write_begin and block_commit_write to zero the
796 ret
= __block_write_begin(page
, block_start
+ 1, 0,
804 handle
= ocfs2_zero_start_ordered_transaction(inode
);
805 if (IS_ERR(handle
)) {
806 ret
= PTR_ERR(handle
);
812 /* must not update i_size! */
813 ret
= block_commit_write(page
, block_start
+ 1,
822 ocfs2_commit_trans(OCFS2_SB(inode
->i_sb
), handle
);
826 page_cache_release(page
);
832 * Find the next range to zero. We do this in terms of bytes because
833 * that's what ocfs2_zero_extend() wants, and it is dealing with the
834 * pagecache. We may return multiple extents.
836 * zero_start and zero_end are ocfs2_zero_extend()s current idea of what
837 * needs to be zeroed. range_start and range_end return the next zeroing
838 * range. A subsequent call should pass the previous range_end as its
839 * zero_start. If range_end is 0, there's nothing to do.
841 * Unwritten extents are skipped over. Refcounted extents are CoWd.
843 static int ocfs2_zero_extend_get_range(struct inode
*inode
,
844 struct buffer_head
*di_bh
,
845 u64 zero_start
, u64 zero_end
,
846 u64
*range_start
, u64
*range_end
)
848 int rc
= 0, needs_cow
= 0;
849 u32 p_cpos
, zero_clusters
= 0;
851 zero_start
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
852 u32 last_cpos
= ocfs2_clusters_for_bytes(inode
->i_sb
, zero_end
);
853 unsigned int num_clusters
= 0;
854 unsigned int ext_flags
= 0;
856 while (zero_cpos
< last_cpos
) {
857 rc
= ocfs2_get_clusters(inode
, zero_cpos
, &p_cpos
,
858 &num_clusters
, &ext_flags
);
864 if (p_cpos
&& !(ext_flags
& OCFS2_EXT_UNWRITTEN
)) {
865 zero_clusters
= num_clusters
;
866 if (ext_flags
& OCFS2_EXT_REFCOUNTED
)
871 zero_cpos
+= num_clusters
;
873 if (!zero_clusters
) {
878 while ((zero_cpos
+ zero_clusters
) < last_cpos
) {
879 rc
= ocfs2_get_clusters(inode
, zero_cpos
+ zero_clusters
,
880 &p_cpos
, &num_clusters
,
887 if (!p_cpos
|| (ext_flags
& OCFS2_EXT_UNWRITTEN
))
889 if (ext_flags
& OCFS2_EXT_REFCOUNTED
)
891 zero_clusters
+= num_clusters
;
893 if ((zero_cpos
+ zero_clusters
) > last_cpos
)
894 zero_clusters
= last_cpos
- zero_cpos
;
897 rc
= ocfs2_refcount_cow(inode
, di_bh
, zero_cpos
,
898 zero_clusters
, UINT_MAX
);
905 *range_start
= ocfs2_clusters_to_bytes(inode
->i_sb
, zero_cpos
);
906 *range_end
= ocfs2_clusters_to_bytes(inode
->i_sb
,
907 zero_cpos
+ zero_clusters
);
914 * Zero one range returned from ocfs2_zero_extend_get_range(). The caller
915 * has made sure that the entire range needs zeroing.
917 static int ocfs2_zero_extend_range(struct inode
*inode
, u64 range_start
,
922 u64 zero_pos
= range_start
;
924 trace_ocfs2_zero_extend_range(
925 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
926 (unsigned long long)range_start
,
927 (unsigned long long)range_end
);
928 BUG_ON(range_start
>= range_end
);
930 while (zero_pos
< range_end
) {
931 next_pos
= (zero_pos
& PAGE_CACHE_MASK
) + PAGE_CACHE_SIZE
;
932 if (next_pos
> range_end
)
933 next_pos
= range_end
;
934 rc
= ocfs2_write_zero_page(inode
, zero_pos
, next_pos
);
942 * Very large extends have the potential to lock up
943 * the cpu for extended periods of time.
951 int ocfs2_zero_extend(struct inode
*inode
, struct buffer_head
*di_bh
,
955 u64 zero_start
, range_start
= 0, range_end
= 0;
956 struct super_block
*sb
= inode
->i_sb
;
958 zero_start
= ocfs2_align_bytes_to_blocks(sb
, i_size_read(inode
));
959 trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode
)->ip_blkno
,
960 (unsigned long long)zero_start
,
961 (unsigned long long)i_size_read(inode
));
962 while (zero_start
< zero_to_size
) {
963 ret
= ocfs2_zero_extend_get_range(inode
, di_bh
, zero_start
,
974 if (range_start
< zero_start
)
975 range_start
= zero_start
;
976 if (range_end
> zero_to_size
)
977 range_end
= zero_to_size
;
979 ret
= ocfs2_zero_extend_range(inode
, range_start
,
985 zero_start
= range_end
;
991 int ocfs2_extend_no_holes(struct inode
*inode
, struct buffer_head
*di_bh
,
992 u64 new_i_size
, u64 zero_to
)
996 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
999 * Only quota files call this without a bh, and they can't be
1002 BUG_ON(!di_bh
&& (oi
->ip_dyn_features
& OCFS2_HAS_REFCOUNT_FL
));
1003 BUG_ON(!di_bh
&& !(oi
->ip_flags
& OCFS2_INODE_SYSTEM_FILE
));
1005 clusters_to_add
= ocfs2_clusters_for_bytes(inode
->i_sb
, new_i_size
);
1006 if (clusters_to_add
< oi
->ip_clusters
)
1007 clusters_to_add
= 0;
1009 clusters_to_add
-= oi
->ip_clusters
;
1011 if (clusters_to_add
) {
1012 ret
= __ocfs2_extend_allocation(inode
, oi
->ip_clusters
,
1013 clusters_to_add
, 0);
1021 * Call this even if we don't add any clusters to the tree. We
1022 * still need to zero the area between the old i_size and the
1025 ret
= ocfs2_zero_extend(inode
, di_bh
, zero_to
);
1033 static int ocfs2_extend_file(struct inode
*inode
,
1034 struct buffer_head
*di_bh
,
1038 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
1042 /* setattr sometimes calls us like this. */
1043 if (new_i_size
== 0)
1046 if (i_size_read(inode
) == new_i_size
)
1048 BUG_ON(new_i_size
< i_size_read(inode
));
1051 * The alloc sem blocks people in read/write from reading our
1052 * allocation until we're done changing it. We depend on
1053 * i_mutex to block other extend/truncate calls while we're
1054 * here. We even have to hold it for sparse files because there
1055 * might be some tail zeroing.
1057 down_write(&oi
->ip_alloc_sem
);
1059 if (oi
->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1061 * We can optimize small extends by keeping the inodes
1064 if (ocfs2_size_fits_inline_data(di_bh
, new_i_size
)) {
1065 up_write(&oi
->ip_alloc_sem
);
1066 goto out_update_size
;
1069 ret
= ocfs2_convert_inline_data_to_extents(inode
, di_bh
);
1071 up_write(&oi
->ip_alloc_sem
);
1077 if (ocfs2_sparse_alloc(OCFS2_SB(inode
->i_sb
)))
1078 ret
= ocfs2_zero_extend(inode
, di_bh
, new_i_size
);
1080 ret
= ocfs2_extend_no_holes(inode
, di_bh
, new_i_size
,
1083 up_write(&oi
->ip_alloc_sem
);
1091 ret
= ocfs2_simple_size_update(inode
, di_bh
, new_i_size
);
1099 int ocfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1101 int status
= 0, size_change
;
1102 struct inode
*inode
= dentry
->d_inode
;
1103 struct super_block
*sb
= inode
->i_sb
;
1104 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
1105 struct buffer_head
*bh
= NULL
;
1106 handle_t
*handle
= NULL
;
1107 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
1110 trace_ocfs2_setattr(inode
, dentry
,
1111 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
1112 dentry
->d_name
.len
, dentry
->d_name
.name
,
1113 attr
->ia_valid
, attr
->ia_mode
,
1114 from_kuid(&init_user_ns
, attr
->ia_uid
),
1115 from_kgid(&init_user_ns
, attr
->ia_gid
));
1117 /* ensuring we don't even attempt to truncate a symlink */
1118 if (S_ISLNK(inode
->i_mode
))
1119 attr
->ia_valid
&= ~ATTR_SIZE
;
1121 #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
1122 | ATTR_GID | ATTR_UID | ATTR_MODE)
1123 if (!(attr
->ia_valid
& OCFS2_VALID_ATTRS
))
1126 status
= inode_change_ok(inode
, attr
);
1130 if (is_quota_modification(inode
, attr
))
1131 dquot_initialize(inode
);
1132 size_change
= S_ISREG(inode
->i_mode
) && attr
->ia_valid
& ATTR_SIZE
;
1134 status
= ocfs2_rw_lock(inode
, 1);
1141 status
= ocfs2_inode_lock(inode
, &bh
, 1);
1143 if (status
!= -ENOENT
)
1145 goto bail_unlock_rw
;
1148 if (size_change
&& attr
->ia_size
!= i_size_read(inode
)) {
1149 status
= inode_newsize_ok(inode
, attr
->ia_size
);
1153 inode_dio_wait(inode
);
1155 if (i_size_read(inode
) > attr
->ia_size
) {
1156 if (ocfs2_should_order_data(inode
)) {
1157 status
= ocfs2_begin_ordered_truncate(inode
,
1162 status
= ocfs2_truncate_file(inode
, bh
, attr
->ia_size
);
1164 status
= ocfs2_extend_file(inode
, bh
, attr
->ia_size
);
1166 if (status
!= -ENOSPC
)
1173 if ((attr
->ia_valid
& ATTR_UID
&& !uid_eq(attr
->ia_uid
, inode
->i_uid
)) ||
1174 (attr
->ia_valid
& ATTR_GID
&& !gid_eq(attr
->ia_gid
, inode
->i_gid
))) {
1176 * Gather pointers to quota structures so that allocation /
1177 * freeing of quota structures happens here and not inside
1178 * dquot_transfer() where we have problems with lock ordering
1180 if (attr
->ia_valid
& ATTR_UID
&& !uid_eq(attr
->ia_uid
, inode
->i_uid
)
1181 && OCFS2_HAS_RO_COMPAT_FEATURE(sb
,
1182 OCFS2_FEATURE_RO_COMPAT_USRQUOTA
)) {
1183 transfer_to
[USRQUOTA
] = dqget(sb
, make_kqid_uid(attr
->ia_uid
));
1184 if (!transfer_to
[USRQUOTA
]) {
1189 if (attr
->ia_valid
& ATTR_GID
&& !gid_eq(attr
->ia_gid
, inode
->i_gid
)
1190 && OCFS2_HAS_RO_COMPAT_FEATURE(sb
,
1191 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA
)) {
1192 transfer_to
[GRPQUOTA
] = dqget(sb
, make_kqid_gid(attr
->ia_gid
));
1193 if (!transfer_to
[GRPQUOTA
]) {
1198 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
+
1199 2 * ocfs2_quota_trans_credits(sb
));
1200 if (IS_ERR(handle
)) {
1201 status
= PTR_ERR(handle
);
1205 status
= __dquot_transfer(inode
, transfer_to
);
1209 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1210 if (IS_ERR(handle
)) {
1211 status
= PTR_ERR(handle
);
1217 setattr_copy(inode
, attr
);
1218 mark_inode_dirty(inode
);
1220 status
= ocfs2_mark_inode_dirty(handle
, inode
, bh
);
1225 ocfs2_commit_trans(osb
, handle
);
1227 ocfs2_inode_unlock(inode
, 1);
1230 ocfs2_rw_unlock(inode
, 1);
1234 /* Release quota pointers in case we acquired them */
1235 for (qtype
= 0; qtype
< MAXQUOTAS
; qtype
++)
1236 dqput(transfer_to
[qtype
]);
1238 if (!status
&& attr
->ia_valid
& ATTR_MODE
) {
1239 status
= posix_acl_chmod(inode
, inode
->i_mode
);
1247 int ocfs2_getattr(struct vfsmount
*mnt
,
1248 struct dentry
*dentry
,
1251 struct inode
*inode
= dentry
->d_inode
;
1252 struct super_block
*sb
= dentry
->d_inode
->i_sb
;
1253 struct ocfs2_super
*osb
= sb
->s_fs_info
;
1256 err
= ocfs2_inode_revalidate(dentry
);
1263 generic_fillattr(inode
, stat
);
1265 /* We set the blksize from the cluster size for performance */
1266 stat
->blksize
= osb
->s_clustersize
;
1272 int ocfs2_permission(struct inode
*inode
, int mask
)
1276 if (mask
& MAY_NOT_BLOCK
)
1279 ret
= ocfs2_inode_lock(inode
, NULL
, 0);
1286 ret
= generic_permission(inode
, mask
);
1288 ocfs2_inode_unlock(inode
, 0);
1293 static int __ocfs2_write_remove_suid(struct inode
*inode
,
1294 struct buffer_head
*bh
)
1298 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1299 struct ocfs2_dinode
*di
;
1301 trace_ocfs2_write_remove_suid(
1302 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
1305 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1306 if (IS_ERR(handle
)) {
1307 ret
= PTR_ERR(handle
);
1312 ret
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), bh
,
1313 OCFS2_JOURNAL_ACCESS_WRITE
);
1319 inode
->i_mode
&= ~S_ISUID
;
1320 if ((inode
->i_mode
& S_ISGID
) && (inode
->i_mode
& S_IXGRP
))
1321 inode
->i_mode
&= ~S_ISGID
;
1323 di
= (struct ocfs2_dinode
*) bh
->b_data
;
1324 di
->i_mode
= cpu_to_le16(inode
->i_mode
);
1326 ocfs2_journal_dirty(handle
, bh
);
1329 ocfs2_commit_trans(osb
, handle
);
1335 * Will look for holes and unwritten extents in the range starting at
1336 * pos for count bytes (inclusive).
1338 static int ocfs2_check_range_for_holes(struct inode
*inode
, loff_t pos
,
1342 unsigned int extent_flags
;
1343 u32 cpos
, clusters
, extent_len
, phys_cpos
;
1344 struct super_block
*sb
= inode
->i_sb
;
1346 cpos
= pos
>> OCFS2_SB(sb
)->s_clustersize_bits
;
1347 clusters
= ocfs2_clusters_for_bytes(sb
, pos
+ count
) - cpos
;
1350 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
, &extent_len
,
1357 if (phys_cpos
== 0 || (extent_flags
& OCFS2_EXT_UNWRITTEN
)) {
1362 if (extent_len
> clusters
)
1363 extent_len
= clusters
;
1365 clusters
-= extent_len
;
1372 static int ocfs2_write_remove_suid(struct inode
*inode
)
1375 struct buffer_head
*bh
= NULL
;
1377 ret
= ocfs2_read_inode_block(inode
, &bh
);
1383 ret
= __ocfs2_write_remove_suid(inode
, bh
);
1390 * Allocate enough extents to cover the region starting at byte offset
1391 * start for len bytes. Existing extents are skipped, any extents
1392 * added are marked as "unwritten".
1394 static int ocfs2_allocate_unwritten_extents(struct inode
*inode
,
1398 u32 cpos
, phys_cpos
, clusters
, alloc_size
;
1399 u64 end
= start
+ len
;
1400 struct buffer_head
*di_bh
= NULL
;
1402 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1403 ret
= ocfs2_read_inode_block(inode
, &di_bh
);
1410 * Nothing to do if the requested reservation range
1411 * fits within the inode.
1413 if (ocfs2_size_fits_inline_data(di_bh
, end
))
1416 ret
= ocfs2_convert_inline_data_to_extents(inode
, di_bh
);
1424 * We consider both start and len to be inclusive.
1426 cpos
= start
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
1427 clusters
= ocfs2_clusters_for_bytes(inode
->i_sb
, start
+ len
);
1431 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
,
1439 * Hole or existing extent len can be arbitrary, so
1440 * cap it to our own allocation request.
1442 if (alloc_size
> clusters
)
1443 alloc_size
= clusters
;
1447 * We already have an allocation at this
1448 * region so we can safely skip it.
1453 ret
= __ocfs2_extend_allocation(inode
, cpos
, alloc_size
, 1);
1462 clusters
-= alloc_size
;
1473 * Truncate a byte range, avoiding pages within partial clusters. This
1474 * preserves those pages for the zeroing code to write to.
1476 static void ocfs2_truncate_cluster_pages(struct inode
*inode
, u64 byte_start
,
1479 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1481 struct address_space
*mapping
= inode
->i_mapping
;
1483 start
= (loff_t
)ocfs2_align_bytes_to_clusters(inode
->i_sb
, byte_start
);
1484 end
= byte_start
+ byte_len
;
1485 end
= end
& ~(osb
->s_clustersize
- 1);
1488 unmap_mapping_range(mapping
, start
, end
- start
, 0);
1489 truncate_inode_pages_range(mapping
, start
, end
- 1);
1493 static int ocfs2_zero_partial_clusters(struct inode
*inode
,
1497 u64 tmpend
, end
= start
+ len
;
1498 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1499 unsigned int csize
= osb
->s_clustersize
;
1503 * The "start" and "end" values are NOT necessarily part of
1504 * the range whose allocation is being deleted. Rather, this
1505 * is what the user passed in with the request. We must zero
1506 * partial clusters here. There's no need to worry about
1507 * physical allocation - the zeroing code knows to skip holes.
1509 trace_ocfs2_zero_partial_clusters(
1510 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
1511 (unsigned long long)start
, (unsigned long long)end
);
1514 * If both edges are on a cluster boundary then there's no
1515 * zeroing required as the region is part of the allocation to
1518 if ((start
& (csize
- 1)) == 0 && (end
& (csize
- 1)) == 0)
1521 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1522 if (IS_ERR(handle
)) {
1523 ret
= PTR_ERR(handle
);
1529 * We want to get the byte offset of the end of the 1st cluster.
1531 tmpend
= (u64
)osb
->s_clustersize
+ (start
& ~(osb
->s_clustersize
- 1));
1535 trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start
,
1536 (unsigned long long)tmpend
);
1538 ret
= ocfs2_zero_range_for_truncate(inode
, handle
, start
, tmpend
);
1544 * This may make start and end equal, but the zeroing
1545 * code will skip any work in that case so there's no
1546 * need to catch it up here.
1548 start
= end
& ~(osb
->s_clustersize
- 1);
1550 trace_ocfs2_zero_partial_clusters_range2(
1551 (unsigned long long)start
, (unsigned long long)end
);
1553 ret
= ocfs2_zero_range_for_truncate(inode
, handle
, start
, end
);
1558 ocfs2_commit_trans(osb
, handle
);
1563 static int ocfs2_find_rec(struct ocfs2_extent_list
*el
, u32 pos
)
1566 struct ocfs2_extent_rec
*rec
= NULL
;
1568 for (i
= le16_to_cpu(el
->l_next_free_rec
) - 1; i
>= 0; i
--) {
1570 rec
= &el
->l_recs
[i
];
1572 if (le32_to_cpu(rec
->e_cpos
) < pos
)
1580 * Helper to calculate the punching pos and length in one run, we handle the
1581 * following three cases in order:
1583 * - remove the entire record
1584 * - remove a partial record
1585 * - no record needs to be removed (hole-punching completed)
1587 static void ocfs2_calc_trunc_pos(struct inode
*inode
,
1588 struct ocfs2_extent_list
*el
,
1589 struct ocfs2_extent_rec
*rec
,
1590 u32 trunc_start
, u32
*trunc_cpos
,
1591 u32
*trunc_len
, u32
*trunc_end
,
1592 u64
*blkno
, int *done
)
1597 range
= le32_to_cpu(rec
->e_cpos
) + ocfs2_rec_clusters(el
, rec
);
1599 if (le32_to_cpu(rec
->e_cpos
) >= trunc_start
) {
1601 * remove an entire extent record.
1603 *trunc_cpos
= le32_to_cpu(rec
->e_cpos
);
1605 * Skip holes if any.
1607 if (range
< *trunc_end
)
1609 *trunc_len
= *trunc_end
- le32_to_cpu(rec
->e_cpos
);
1610 *blkno
= le64_to_cpu(rec
->e_blkno
);
1611 *trunc_end
= le32_to_cpu(rec
->e_cpos
);
1612 } else if (range
> trunc_start
) {
1614 * remove a partial extent record, which means we're
1615 * removing the last extent record.
1617 *trunc_cpos
= trunc_start
;
1621 if (range
< *trunc_end
)
1623 *trunc_len
= *trunc_end
- trunc_start
;
1624 coff
= trunc_start
- le32_to_cpu(rec
->e_cpos
);
1625 *blkno
= le64_to_cpu(rec
->e_blkno
) +
1626 ocfs2_clusters_to_blocks(inode
->i_sb
, coff
);
1627 *trunc_end
= trunc_start
;
1630 * It may have two following possibilities:
1632 * - last record has been removed
1633 * - trunc_start was within a hole
1635 * both two cases mean the completion of hole punching.
1643 static int ocfs2_remove_inode_range(struct inode
*inode
,
1644 struct buffer_head
*di_bh
, u64 byte_start
,
1647 int ret
= 0, flags
= 0, done
= 0, i
;
1648 u32 trunc_start
, trunc_len
, trunc_end
, trunc_cpos
, phys_cpos
;
1650 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1651 struct ocfs2_cached_dealloc_ctxt dealloc
;
1652 struct address_space
*mapping
= inode
->i_mapping
;
1653 struct ocfs2_extent_tree et
;
1654 struct ocfs2_path
*path
= NULL
;
1655 struct ocfs2_extent_list
*el
= NULL
;
1656 struct ocfs2_extent_rec
*rec
= NULL
;
1657 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
1658 u64 blkno
, refcount_loc
= le64_to_cpu(di
->i_refcount_loc
);
1660 ocfs2_init_dinode_extent_tree(&et
, INODE_CACHE(inode
), di_bh
);
1661 ocfs2_init_dealloc_ctxt(&dealloc
);
1663 trace_ocfs2_remove_inode_range(
1664 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
1665 (unsigned long long)byte_start
,
1666 (unsigned long long)byte_len
);
1671 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1672 ret
= ocfs2_truncate_inline(inode
, di_bh
, byte_start
,
1673 byte_start
+ byte_len
, 0);
1679 * There's no need to get fancy with the page cache
1680 * truncate of an inline-data inode. We're talking
1681 * about less than a page here, which will be cached
1682 * in the dinode buffer anyway.
1684 unmap_mapping_range(mapping
, 0, 0, 0);
1685 truncate_inode_pages(mapping
, 0);
1690 * For reflinks, we may need to CoW 2 clusters which might be
1691 * partially zero'd later, if hole's start and end offset were
1692 * within one cluster(means is not exactly aligned to clustersize).
1695 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_HAS_REFCOUNT_FL
) {
1697 ret
= ocfs2_cow_file_pos(inode
, di_bh
, byte_start
);
1703 ret
= ocfs2_cow_file_pos(inode
, di_bh
, byte_start
+ byte_len
);
1710 trunc_start
= ocfs2_clusters_for_bytes(osb
->sb
, byte_start
);
1711 trunc_end
= (byte_start
+ byte_len
) >> osb
->s_clustersize_bits
;
1712 cluster_in_el
= trunc_end
;
1714 ret
= ocfs2_zero_partial_clusters(inode
, byte_start
, byte_len
);
1720 path
= ocfs2_new_path_from_et(&et
);
1727 while (trunc_end
> trunc_start
) {
1729 ret
= ocfs2_find_path(INODE_CACHE(inode
), path
,
1736 el
= path_leaf_el(path
);
1738 i
= ocfs2_find_rec(el
, trunc_end
);
1740 * Need to go to previous extent block.
1743 if (path
->p_tree_depth
== 0)
1746 ret
= ocfs2_find_cpos_for_left_leaf(inode
->i_sb
,
1755 * We've reached the leftmost extent block,
1756 * it's safe to leave.
1758 if (cluster_in_el
== 0)
1762 * The 'pos' searched for previous extent block is
1763 * always one cluster less than actual trunc_end.
1765 trunc_end
= cluster_in_el
+ 1;
1767 ocfs2_reinit_path(path
, 1);
1772 rec
= &el
->l_recs
[i
];
1774 ocfs2_calc_trunc_pos(inode
, el
, rec
, trunc_start
, &trunc_cpos
,
1775 &trunc_len
, &trunc_end
, &blkno
, &done
);
1779 flags
= rec
->e_flags
;
1780 phys_cpos
= ocfs2_blocks_to_clusters(inode
->i_sb
, blkno
);
1782 ret
= ocfs2_remove_btree_range(inode
, &et
, trunc_cpos
,
1783 phys_cpos
, trunc_len
, flags
,
1784 &dealloc
, refcount_loc
);
1790 cluster_in_el
= trunc_end
;
1792 ocfs2_reinit_path(path
, 1);
1795 ocfs2_truncate_cluster_pages(inode
, byte_start
, byte_len
);
1798 ocfs2_free_path(path
);
1799 ocfs2_schedule_truncate_log_flush(osb
, 1);
1800 ocfs2_run_deallocs(osb
, &dealloc
);
1806 * Parts of this function taken from xfs_change_file_space()
1808 static int __ocfs2_change_file_space(struct file
*file
, struct inode
*inode
,
1809 loff_t f_pos
, unsigned int cmd
,
1810 struct ocfs2_space_resv
*sr
,
1816 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1817 struct buffer_head
*di_bh
= NULL
;
1819 unsigned long long max_off
= inode
->i_sb
->s_maxbytes
;
1821 if (ocfs2_is_hard_readonly(osb
) || ocfs2_is_soft_readonly(osb
))
1824 mutex_lock(&inode
->i_mutex
);
1827 * This prevents concurrent writes on other nodes
1829 ret
= ocfs2_rw_lock(inode
, 1);
1835 ret
= ocfs2_inode_lock(inode
, &di_bh
, 1);
1841 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
)) {
1843 goto out_inode_unlock
;
1846 switch (sr
->l_whence
) {
1847 case 0: /*SEEK_SET*/
1849 case 1: /*SEEK_CUR*/
1850 sr
->l_start
+= f_pos
;
1852 case 2: /*SEEK_END*/
1853 sr
->l_start
+= i_size_read(inode
);
1857 goto out_inode_unlock
;
1861 llen
= sr
->l_len
> 0 ? sr
->l_len
- 1 : sr
->l_len
;
1864 || sr
->l_start
> max_off
1865 || (sr
->l_start
+ llen
) < 0
1866 || (sr
->l_start
+ llen
) > max_off
) {
1868 goto out_inode_unlock
;
1870 size
= sr
->l_start
+ sr
->l_len
;
1872 if (cmd
== OCFS2_IOC_RESVSP
|| cmd
== OCFS2_IOC_RESVSP64
||
1873 cmd
== OCFS2_IOC_UNRESVSP
|| cmd
== OCFS2_IOC_UNRESVSP64
) {
1874 if (sr
->l_len
<= 0) {
1876 goto out_inode_unlock
;
1880 if (file
&& should_remove_suid(file
->f_path
.dentry
)) {
1881 ret
= __ocfs2_write_remove_suid(inode
, di_bh
);
1884 goto out_inode_unlock
;
1888 down_write(&OCFS2_I(inode
)->ip_alloc_sem
);
1890 case OCFS2_IOC_RESVSP
:
1891 case OCFS2_IOC_RESVSP64
:
1893 * This takes unsigned offsets, but the signed ones we
1894 * pass have been checked against overflow above.
1896 ret
= ocfs2_allocate_unwritten_extents(inode
, sr
->l_start
,
1899 case OCFS2_IOC_UNRESVSP
:
1900 case OCFS2_IOC_UNRESVSP64
:
1901 ret
= ocfs2_remove_inode_range(inode
, di_bh
, sr
->l_start
,
1907 up_write(&OCFS2_I(inode
)->ip_alloc_sem
);
1910 goto out_inode_unlock
;
1914 * We update c/mtime for these changes
1916 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1917 if (IS_ERR(handle
)) {
1918 ret
= PTR_ERR(handle
);
1920 goto out_inode_unlock
;
1923 if (change_size
&& i_size_read(inode
) < size
)
1924 i_size_write(inode
, size
);
1926 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
1927 ret
= ocfs2_mark_inode_dirty(handle
, inode
, di_bh
);
1931 if (file
&& (file
->f_flags
& O_SYNC
))
1934 ocfs2_commit_trans(osb
, handle
);
1938 ocfs2_inode_unlock(inode
, 1);
1940 ocfs2_rw_unlock(inode
, 1);
1943 mutex_unlock(&inode
->i_mutex
);
1947 int ocfs2_change_file_space(struct file
*file
, unsigned int cmd
,
1948 struct ocfs2_space_resv
*sr
)
1950 struct inode
*inode
= file_inode(file
);
1951 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1954 if ((cmd
== OCFS2_IOC_RESVSP
|| cmd
== OCFS2_IOC_RESVSP64
) &&
1955 !ocfs2_writes_unwritten_extents(osb
))
1957 else if ((cmd
== OCFS2_IOC_UNRESVSP
|| cmd
== OCFS2_IOC_UNRESVSP64
) &&
1958 !ocfs2_sparse_alloc(osb
))
1961 if (!S_ISREG(inode
->i_mode
))
1964 if (!(file
->f_mode
& FMODE_WRITE
))
1967 ret
= mnt_want_write_file(file
);
1970 ret
= __ocfs2_change_file_space(file
, inode
, file
->f_pos
, cmd
, sr
, 0);
1971 mnt_drop_write_file(file
);
1975 static long ocfs2_fallocate(struct file
*file
, int mode
, loff_t offset
,
1978 struct inode
*inode
= file_inode(file
);
1979 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1980 struct ocfs2_space_resv sr
;
1981 int change_size
= 1;
1982 int cmd
= OCFS2_IOC_RESVSP64
;
1984 if (mode
& ~(FALLOC_FL_KEEP_SIZE
| FALLOC_FL_PUNCH_HOLE
))
1986 if (!ocfs2_writes_unwritten_extents(osb
))
1989 if (mode
& FALLOC_FL_KEEP_SIZE
)
1992 if (mode
& FALLOC_FL_PUNCH_HOLE
)
1993 cmd
= OCFS2_IOC_UNRESVSP64
;
1996 sr
.l_start
= (s64
)offset
;
1997 sr
.l_len
= (s64
)len
;
1999 return __ocfs2_change_file_space(NULL
, inode
, offset
, cmd
, &sr
,
2003 int ocfs2_check_range_for_refcount(struct inode
*inode
, loff_t pos
,
2007 unsigned int extent_flags
;
2008 u32 cpos
, clusters
, extent_len
, phys_cpos
;
2009 struct super_block
*sb
= inode
->i_sb
;
2011 if (!ocfs2_refcount_tree(OCFS2_SB(inode
->i_sb
)) ||
2012 !(OCFS2_I(inode
)->ip_dyn_features
& OCFS2_HAS_REFCOUNT_FL
) ||
2013 OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
2016 cpos
= pos
>> OCFS2_SB(sb
)->s_clustersize_bits
;
2017 clusters
= ocfs2_clusters_for_bytes(sb
, pos
+ count
) - cpos
;
2020 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
, &extent_len
,
2027 if (phys_cpos
&& (extent_flags
& OCFS2_EXT_REFCOUNTED
)) {
2032 if (extent_len
> clusters
)
2033 extent_len
= clusters
;
2035 clusters
-= extent_len
;
2042 static void ocfs2_aiodio_wait(struct inode
*inode
)
2044 wait_queue_head_t
*wq
= ocfs2_ioend_wq(inode
);
2046 wait_event(*wq
, (atomic_read(&OCFS2_I(inode
)->ip_unaligned_aio
) == 0));
2049 static int ocfs2_is_io_unaligned(struct inode
*inode
, size_t count
, loff_t pos
)
2051 int blockmask
= inode
->i_sb
->s_blocksize
- 1;
2052 loff_t final_size
= pos
+ count
;
2054 if ((pos
& blockmask
) || (final_size
& blockmask
))
2059 static int ocfs2_prepare_inode_for_refcount(struct inode
*inode
,
2061 loff_t pos
, size_t count
,
2065 struct buffer_head
*di_bh
= NULL
;
2066 u32 cpos
= pos
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
2068 ocfs2_clusters_for_bytes(inode
->i_sb
, pos
+ count
) - cpos
;
2070 ret
= ocfs2_inode_lock(inode
, &di_bh
, 1);
2078 ret
= ocfs2_refcount_cow(inode
, di_bh
, cpos
, clusters
, UINT_MAX
);
2086 static int ocfs2_prepare_inode_for_write(struct file
*file
,
2093 int ret
= 0, meta_level
= 0;
2094 struct dentry
*dentry
= file
->f_path
.dentry
;
2095 struct inode
*inode
= dentry
->d_inode
;
2096 loff_t saved_pos
= 0, end
;
2099 * We start with a read level meta lock and only jump to an ex
2100 * if we need to make modifications here.
2103 ret
= ocfs2_inode_lock(inode
, NULL
, meta_level
);
2110 /* Clear suid / sgid if necessary. We do this here
2111 * instead of later in the write path because
2112 * remove_suid() calls ->setattr without any hint that
2113 * we may have already done our cluster locking. Since
2114 * ocfs2_setattr() *must* take cluster locks to
2115 * proceed, this will lead us to recursively lock the
2116 * inode. There's also the dinode i_size state which
2117 * can be lost via setattr during extending writes (we
2118 * set inode->i_size at the end of a write. */
2119 if (should_remove_suid(dentry
)) {
2120 if (meta_level
== 0) {
2121 ocfs2_inode_unlock(inode
, meta_level
);
2126 ret
= ocfs2_write_remove_suid(inode
);
2133 /* work on a copy of ppos until we're sure that we won't have
2134 * to recalculate it due to relocking. */
2136 saved_pos
= i_size_read(inode
);
2140 end
= saved_pos
+ count
;
2142 ret
= ocfs2_check_range_for_refcount(inode
, saved_pos
, count
);
2144 ocfs2_inode_unlock(inode
, meta_level
);
2147 ret
= ocfs2_prepare_inode_for_refcount(inode
,
2164 * Skip the O_DIRECT checks if we don't need
2167 if (!direct_io
|| !(*direct_io
))
2171 * There's no sane way to do direct writes to an inode
2174 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
2180 * Allowing concurrent direct writes means
2181 * i_size changes wouldn't be synchronized, so
2182 * one node could wind up truncating another
2185 if (end
> i_size_read(inode
)) {
2191 * We don't fill holes during direct io, so
2192 * check for them here. If any are found, the
2193 * caller will have to retake some cluster
2194 * locks and initiate the io as buffered.
2196 ret
= ocfs2_check_range_for_holes(inode
, saved_pos
, count
);
2209 trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode
)->ip_blkno
,
2210 saved_pos
, appending
, count
,
2211 direct_io
, has_refcount
);
2213 if (meta_level
>= 0)
2214 ocfs2_inode_unlock(inode
, meta_level
);
2220 static ssize_t
ocfs2_file_aio_write(struct kiocb
*iocb
,
2221 const struct iovec
*iov
,
2222 unsigned long nr_segs
,
2225 int ret
, direct_io
, appending
, rw_level
, have_alloc_sem
= 0;
2226 int can_do_direct
, has_refcount
= 0;
2227 ssize_t written
= 0;
2228 size_t ocount
; /* original count */
2229 size_t count
; /* after file limit checks */
2230 loff_t old_size
, *ppos
= &iocb
->ki_pos
;
2232 struct file
*file
= iocb
->ki_filp
;
2233 struct inode
*inode
= file_inode(file
);
2234 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
2235 int full_coherency
= !(osb
->s_mount_opt
&
2236 OCFS2_MOUNT_COHERENCY_BUFFERED
);
2237 int unaligned_dio
= 0;
2239 trace_ocfs2_file_aio_write(inode
, file
, file
->f_path
.dentry
,
2240 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
2241 file
->f_path
.dentry
->d_name
.len
,
2242 file
->f_path
.dentry
->d_name
.name
,
2243 (unsigned int)nr_segs
);
2245 if (iocb
->ki_nbytes
== 0)
2248 appending
= file
->f_flags
& O_APPEND
? 1 : 0;
2249 direct_io
= file
->f_flags
& O_DIRECT
? 1 : 0;
2251 mutex_lock(&inode
->i_mutex
);
2253 ocfs2_iocb_clear_sem_locked(iocb
);
2256 /* to match setattr's i_mutex -> rw_lock ordering */
2259 /* communicate with ocfs2_dio_end_io */
2260 ocfs2_iocb_set_sem_locked(iocb
);
2264 * Concurrent O_DIRECT writes are allowed with
2265 * mount_option "coherency=buffered".
2267 rw_level
= (!direct_io
|| full_coherency
);
2269 ret
= ocfs2_rw_lock(inode
, rw_level
);
2276 * O_DIRECT writes with "coherency=full" need to take EX cluster
2277 * inode_lock to guarantee coherency.
2279 if (direct_io
&& full_coherency
) {
2281 * We need to take and drop the inode lock to force
2282 * other nodes to drop their caches. Buffered I/O
2283 * already does this in write_begin().
2285 ret
= ocfs2_inode_lock(inode
, NULL
, 1);
2291 ocfs2_inode_unlock(inode
, 1);
2294 can_do_direct
= direct_io
;
2295 ret
= ocfs2_prepare_inode_for_write(file
, ppos
,
2296 iocb
->ki_nbytes
, appending
,
2297 &can_do_direct
, &has_refcount
);
2303 if (direct_io
&& !is_sync_kiocb(iocb
))
2304 unaligned_dio
= ocfs2_is_io_unaligned(inode
, iocb
->ki_nbytes
,
2308 * We can't complete the direct I/O as requested, fall back to
2311 if (direct_io
&& !can_do_direct
) {
2312 ocfs2_rw_unlock(inode
, rw_level
);
2321 if (unaligned_dio
) {
2323 * Wait on previous unaligned aio to complete before
2326 ocfs2_aiodio_wait(inode
);
2328 /* Mark the iocb as needing a decrement in ocfs2_dio_end_io */
2329 atomic_inc(&OCFS2_I(inode
)->ip_unaligned_aio
);
2330 ocfs2_iocb_set_unaligned_aio(iocb
);
2334 * To later detect whether a journal commit for sync writes is
2335 * necessary, we sample i_size, and cluster count here.
2337 old_size
= i_size_read(inode
);
2338 old_clusters
= OCFS2_I(inode
)->ip_clusters
;
2340 /* communicate with ocfs2_dio_end_io */
2341 ocfs2_iocb_set_rw_locked(iocb
, rw_level
);
2343 ret
= generic_segment_checks(iov
, &nr_segs
, &ocount
,
2349 ret
= generic_write_checks(file
, ppos
, &count
,
2350 S_ISBLK(inode
->i_mode
));
2355 written
= generic_file_direct_write(iocb
, iov
, &nr_segs
, *ppos
,
2356 ppos
, count
, ocount
);
2362 current
->backing_dev_info
= file
->f_mapping
->backing_dev_info
;
2363 written
= generic_file_buffered_write(iocb
, iov
, nr_segs
, *ppos
,
2365 current
->backing_dev_info
= NULL
;
2369 /* buffered aio wouldn't have proper lock coverage today */
2370 BUG_ON(ret
== -EIOCBQUEUED
&& !(file
->f_flags
& O_DIRECT
));
2372 if (((file
->f_flags
& O_DSYNC
) && !direct_io
) || IS_SYNC(inode
) ||
2373 ((file
->f_flags
& O_DIRECT
) && !direct_io
)) {
2374 ret
= filemap_fdatawrite_range(file
->f_mapping
, pos
,
2379 if (!ret
&& ((old_size
!= i_size_read(inode
)) ||
2380 (old_clusters
!= OCFS2_I(inode
)->ip_clusters
) ||
2382 ret
= jbd2_journal_force_commit(osb
->journal
->j_journal
);
2388 ret
= filemap_fdatawait_range(file
->f_mapping
, pos
,
2393 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
2394 * function pointer which is called when o_direct io completes so that
2395 * it can unlock our rw lock.
2396 * Unfortunately there are error cases which call end_io and others
2397 * that don't. so we don't have to unlock the rw_lock if either an
2398 * async dio is going to do it in the future or an end_io after an
2399 * error has already done it.
2401 if ((ret
== -EIOCBQUEUED
) || (!ocfs2_iocb_is_rw_locked(iocb
))) {
2407 if (unaligned_dio
) {
2408 ocfs2_iocb_clear_unaligned_aio(iocb
);
2409 atomic_dec(&OCFS2_I(inode
)->ip_unaligned_aio
);
2414 ocfs2_rw_unlock(inode
, rw_level
);
2418 ocfs2_iocb_clear_sem_locked(iocb
);
2420 mutex_unlock(&inode
->i_mutex
);
2427 static int ocfs2_splice_to_file(struct pipe_inode_info
*pipe
,
2429 struct splice_desc
*sd
)
2433 ret
= ocfs2_prepare_inode_for_write(out
, &sd
->pos
,
2434 sd
->total_len
, 0, NULL
, NULL
);
2440 return splice_from_pipe_feed(pipe
, sd
, pipe_to_file
);
2443 static ssize_t
ocfs2_file_splice_write(struct pipe_inode_info
*pipe
,
2450 struct address_space
*mapping
= out
->f_mapping
;
2451 struct inode
*inode
= mapping
->host
;
2452 struct splice_desc sd
= {
2460 trace_ocfs2_file_splice_write(inode
, out
, out
->f_path
.dentry
,
2461 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
2462 out
->f_path
.dentry
->d_name
.len
,
2463 out
->f_path
.dentry
->d_name
.name
, len
);
2467 splice_from_pipe_begin(&sd
);
2469 ret
= splice_from_pipe_next(pipe
, &sd
);
2473 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_CHILD
);
2474 ret
= ocfs2_rw_lock(inode
, 1);
2478 ret
= ocfs2_splice_to_file(pipe
, out
, &sd
);
2479 ocfs2_rw_unlock(inode
, 1);
2481 mutex_unlock(&inode
->i_mutex
);
2483 splice_from_pipe_end(pipe
, &sd
);
2488 ret
= sd
.num_spliced
;
2493 err
= generic_write_sync(out
, *ppos
, ret
);
2499 balance_dirty_pages_ratelimited(mapping
);
2505 static ssize_t
ocfs2_file_splice_read(struct file
*in
,
2507 struct pipe_inode_info
*pipe
,
2511 int ret
= 0, lock_level
= 0;
2512 struct inode
*inode
= file_inode(in
);
2514 trace_ocfs2_file_splice_read(inode
, in
, in
->f_path
.dentry
,
2515 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
2516 in
->f_path
.dentry
->d_name
.len
,
2517 in
->f_path
.dentry
->d_name
.name
, len
);
2520 * See the comment in ocfs2_file_aio_read()
2522 ret
= ocfs2_inode_lock_atime(inode
, in
->f_path
.mnt
, &lock_level
);
2527 ocfs2_inode_unlock(inode
, lock_level
);
2529 ret
= generic_file_splice_read(in
, ppos
, pipe
, len
, flags
);
2535 static ssize_t
ocfs2_file_aio_read(struct kiocb
*iocb
,
2536 const struct iovec
*iov
,
2537 unsigned long nr_segs
,
2540 int ret
= 0, rw_level
= -1, have_alloc_sem
= 0, lock_level
= 0;
2541 struct file
*filp
= iocb
->ki_filp
;
2542 struct inode
*inode
= file_inode(filp
);
2544 trace_ocfs2_file_aio_read(inode
, filp
, filp
->f_path
.dentry
,
2545 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
2546 filp
->f_path
.dentry
->d_name
.len
,
2547 filp
->f_path
.dentry
->d_name
.name
, nr_segs
);
2556 ocfs2_iocb_clear_sem_locked(iocb
);
2559 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2560 * need locks to protect pending reads from racing with truncate.
2562 if (filp
->f_flags
& O_DIRECT
) {
2564 ocfs2_iocb_set_sem_locked(iocb
);
2566 ret
= ocfs2_rw_lock(inode
, 0);
2572 /* communicate with ocfs2_dio_end_io */
2573 ocfs2_iocb_set_rw_locked(iocb
, rw_level
);
2577 * We're fine letting folks race truncates and extending
2578 * writes with read across the cluster, just like they can
2579 * locally. Hence no rw_lock during read.
2581 * Take and drop the meta data lock to update inode fields
2582 * like i_size. This allows the checks down below
2583 * generic_file_aio_read() a chance of actually working.
2585 ret
= ocfs2_inode_lock_atime(inode
, filp
->f_path
.mnt
, &lock_level
);
2590 ocfs2_inode_unlock(inode
, lock_level
);
2592 ret
= generic_file_aio_read(iocb
, iov
, nr_segs
, iocb
->ki_pos
);
2593 trace_generic_file_aio_read_ret(ret
);
2595 /* buffered aio wouldn't have proper lock coverage today */
2596 BUG_ON(ret
== -EIOCBQUEUED
&& !(filp
->f_flags
& O_DIRECT
));
2598 /* see ocfs2_file_aio_write */
2599 if (ret
== -EIOCBQUEUED
|| !ocfs2_iocb_is_rw_locked(iocb
)) {
2606 ocfs2_iocb_clear_sem_locked(iocb
);
2609 ocfs2_rw_unlock(inode
, rw_level
);
2614 /* Refer generic_file_llseek_unlocked() */
2615 static loff_t
ocfs2_file_llseek(struct file
*file
, loff_t offset
, int whence
)
2617 struct inode
*inode
= file
->f_mapping
->host
;
2620 mutex_lock(&inode
->i_mutex
);
2626 offset
+= inode
->i_size
;
2630 offset
= file
->f_pos
;
2633 offset
+= file
->f_pos
;
2637 ret
= ocfs2_seek_data_hole_offset(file
, &offset
, whence
);
2646 offset
= vfs_setpos(file
, offset
, inode
->i_sb
->s_maxbytes
);
2649 mutex_unlock(&inode
->i_mutex
);
2655 const struct inode_operations ocfs2_file_iops
= {
2656 .setattr
= ocfs2_setattr
,
2657 .getattr
= ocfs2_getattr
,
2658 .permission
= ocfs2_permission
,
2659 .setxattr
= generic_setxattr
,
2660 .getxattr
= generic_getxattr
,
2661 .listxattr
= ocfs2_listxattr
,
2662 .removexattr
= generic_removexattr
,
2663 .fiemap
= ocfs2_fiemap
,
2664 .get_acl
= ocfs2_iop_get_acl
,
2665 .set_acl
= ocfs2_iop_set_acl
,
2668 const struct inode_operations ocfs2_special_file_iops
= {
2669 .setattr
= ocfs2_setattr
,
2670 .getattr
= ocfs2_getattr
,
2671 .permission
= ocfs2_permission
,
2672 .get_acl
= ocfs2_iop_get_acl
,
2673 .set_acl
= ocfs2_iop_set_acl
,
2677 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2678 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2680 const struct file_operations ocfs2_fops
= {
2681 .llseek
= ocfs2_file_llseek
,
2682 .read
= do_sync_read
,
2683 .write
= do_sync_write
,
2685 .fsync
= ocfs2_sync_file
,
2686 .release
= ocfs2_file_release
,
2687 .open
= ocfs2_file_open
,
2688 .aio_read
= ocfs2_file_aio_read
,
2689 .aio_write
= ocfs2_file_aio_write
,
2690 .unlocked_ioctl
= ocfs2_ioctl
,
2691 #ifdef CONFIG_COMPAT
2692 .compat_ioctl
= ocfs2_compat_ioctl
,
2695 .flock
= ocfs2_flock
,
2696 .splice_read
= ocfs2_file_splice_read
,
2697 .splice_write
= ocfs2_file_splice_write
,
2698 .fallocate
= ocfs2_fallocate
,
2701 const struct file_operations ocfs2_dops
= {
2702 .llseek
= generic_file_llseek
,
2703 .read
= generic_read_dir
,
2704 .iterate
= ocfs2_readdir
,
2705 .fsync
= ocfs2_sync_file
,
2706 .release
= ocfs2_dir_release
,
2707 .open
= ocfs2_dir_open
,
2708 .unlocked_ioctl
= ocfs2_ioctl
,
2709 #ifdef CONFIG_COMPAT
2710 .compat_ioctl
= ocfs2_compat_ioctl
,
2713 .flock
= ocfs2_flock
,
2717 * POSIX-lockless variants of our file_operations.
2719 * These will be used if the underlying cluster stack does not support
2720 * posix file locking, if the user passes the "localflocks" mount
2721 * option, or if we have a local-only fs.
2723 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2724 * so we still want it in the case of no stack support for
2725 * plocks. Internally, it will do the right thing when asked to ignore
2728 const struct file_operations ocfs2_fops_no_plocks
= {
2729 .llseek
= ocfs2_file_llseek
,
2730 .read
= do_sync_read
,
2731 .write
= do_sync_write
,
2733 .fsync
= ocfs2_sync_file
,
2734 .release
= ocfs2_file_release
,
2735 .open
= ocfs2_file_open
,
2736 .aio_read
= ocfs2_file_aio_read
,
2737 .aio_write
= ocfs2_file_aio_write
,
2738 .unlocked_ioctl
= ocfs2_ioctl
,
2739 #ifdef CONFIG_COMPAT
2740 .compat_ioctl
= ocfs2_compat_ioctl
,
2742 .flock
= ocfs2_flock
,
2743 .splice_read
= ocfs2_file_splice_read
,
2744 .splice_write
= ocfs2_file_splice_write
,
2745 .fallocate
= ocfs2_fallocate
,
2748 const struct file_operations ocfs2_dops_no_plocks
= {
2749 .llseek
= generic_file_llseek
,
2750 .read
= generic_read_dir
,
2751 .iterate
= ocfs2_readdir
,
2752 .fsync
= ocfs2_sync_file
,
2753 .release
= ocfs2_dir_release
,
2754 .open
= ocfs2_dir_open
,
2755 .unlocked_ioctl
= ocfs2_ioctl
,
2756 #ifdef CONFIG_COMPAT
2757 .compat_ioctl
= ocfs2_compat_ioctl
,
2759 .flock
= ocfs2_flock
,