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>
40 #define MLOG_MASK_PREFIX ML_INODE
41 #include <cluster/masklog.h>
49 #include "extent_map.h"
62 #include "refcounttree.h"
64 #include "buffer_head_io.h"
66 static int ocfs2_sync_inode(struct inode
*inode
)
68 filemap_fdatawrite(inode
->i_mapping
);
69 return sync_mapping_buffers(inode
->i_mapping
);
72 static int ocfs2_init_file_private(struct inode
*inode
, struct file
*file
)
74 struct ocfs2_file_private
*fp
;
76 fp
= kzalloc(sizeof(struct ocfs2_file_private
), GFP_KERNEL
);
81 mutex_init(&fp
->fp_mutex
);
82 ocfs2_file_lock_res_init(&fp
->fp_flock
, fp
);
83 file
->private_data
= fp
;
88 static void ocfs2_free_file_private(struct inode
*inode
, struct file
*file
)
90 struct ocfs2_file_private
*fp
= file
->private_data
;
91 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
94 ocfs2_simple_drop_lockres(osb
, &fp
->fp_flock
);
95 ocfs2_lock_res_free(&fp
->fp_flock
);
97 file
->private_data
= NULL
;
101 static int ocfs2_file_open(struct inode
*inode
, struct file
*file
)
104 int mode
= file
->f_flags
;
105 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
107 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode
, file
,
108 file
->f_path
.dentry
->d_name
.len
, file
->f_path
.dentry
->d_name
.name
);
110 if (file
->f_mode
& FMODE_WRITE
)
111 dquot_initialize(inode
);
113 spin_lock(&oi
->ip_lock
);
115 /* Check that the inode hasn't been wiped from disk by another
116 * node. If it hasn't then we're safe as long as we hold the
117 * spin lock until our increment of open count. */
118 if (OCFS2_I(inode
)->ip_flags
& OCFS2_INODE_DELETED
) {
119 spin_unlock(&oi
->ip_lock
);
126 oi
->ip_flags
|= OCFS2_INODE_OPEN_DIRECT
;
129 spin_unlock(&oi
->ip_lock
);
131 status
= ocfs2_init_file_private(inode
, file
);
134 * We want to set open count back if we're failing the
137 spin_lock(&oi
->ip_lock
);
139 spin_unlock(&oi
->ip_lock
);
147 static int ocfs2_file_release(struct inode
*inode
, struct file
*file
)
149 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
151 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode
, file
,
152 file
->f_path
.dentry
->d_name
.len
,
153 file
->f_path
.dentry
->d_name
.name
);
155 spin_lock(&oi
->ip_lock
);
156 if (!--oi
->ip_open_count
)
157 oi
->ip_flags
&= ~OCFS2_INODE_OPEN_DIRECT
;
158 spin_unlock(&oi
->ip_lock
);
160 ocfs2_free_file_private(inode
, file
);
167 static int ocfs2_dir_open(struct inode
*inode
, struct file
*file
)
169 return ocfs2_init_file_private(inode
, file
);
172 static int ocfs2_dir_release(struct inode
*inode
, struct file
*file
)
174 ocfs2_free_file_private(inode
, file
);
178 static int ocfs2_sync_file(struct file
*file
, int datasync
)
182 struct dentry
*dentry
= file
->f_path
.dentry
;
183 struct inode
*inode
= file
->f_mapping
->host
;
184 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
186 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file
, dentry
, datasync
,
187 dentry
->d_name
.len
, dentry
->d_name
.name
);
189 err
= ocfs2_sync_inode(dentry
->d_inode
);
193 if (datasync
&& !(inode
->i_state
& I_DIRTY_DATASYNC
))
196 journal
= osb
->journal
->j_journal
;
197 err
= jbd2_journal_force_commit(journal
);
202 return (err
< 0) ? -EIO
: 0;
205 int ocfs2_should_update_atime(struct inode
*inode
,
206 struct vfsmount
*vfsmnt
)
209 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
211 if (ocfs2_is_hard_readonly(osb
) || ocfs2_is_soft_readonly(osb
))
214 if ((inode
->i_flags
& S_NOATIME
) ||
215 ((inode
->i_sb
->s_flags
& MS_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
219 * We can be called with no vfsmnt structure - NFSD will
222 * Note that our action here is different than touch_atime() -
223 * if we can't tell whether this is a noatime mount, then we
224 * don't know whether to trust the value of s_atime_quantum.
229 if ((vfsmnt
->mnt_flags
& MNT_NOATIME
) ||
230 ((vfsmnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
233 if (vfsmnt
->mnt_flags
& MNT_RELATIME
) {
234 if ((timespec_compare(&inode
->i_atime
, &inode
->i_mtime
) <= 0) ||
235 (timespec_compare(&inode
->i_atime
, &inode
->i_ctime
) <= 0))
242 if ((now
.tv_sec
- inode
->i_atime
.tv_sec
<= osb
->s_atime_quantum
))
248 int ocfs2_update_inode_atime(struct inode
*inode
,
249 struct buffer_head
*bh
)
252 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
254 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*) bh
->b_data
;
258 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
259 if (IS_ERR(handle
)) {
260 ret
= PTR_ERR(handle
);
265 ret
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), bh
,
266 OCFS2_JOURNAL_ACCESS_WRITE
);
273 * Don't use ocfs2_mark_inode_dirty() here as we don't always
274 * have i_mutex to guard against concurrent changes to other
277 inode
->i_atime
= CURRENT_TIME
;
278 di
->i_atime
= cpu_to_le64(inode
->i_atime
.tv_sec
);
279 di
->i_atime_nsec
= cpu_to_le32(inode
->i_atime
.tv_nsec
);
280 ocfs2_journal_dirty(handle
, bh
);
283 ocfs2_commit_trans(OCFS2_SB(inode
->i_sb
), handle
);
289 static int ocfs2_set_inode_size(handle_t
*handle
,
291 struct buffer_head
*fe_bh
,
297 i_size_write(inode
, new_i_size
);
298 inode
->i_blocks
= ocfs2_inode_sector_count(inode
);
299 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
301 status
= ocfs2_mark_inode_dirty(handle
, inode
, fe_bh
);
312 int ocfs2_simple_size_update(struct inode
*inode
,
313 struct buffer_head
*di_bh
,
317 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
318 handle_t
*handle
= NULL
;
320 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
321 if (IS_ERR(handle
)) {
322 ret
= PTR_ERR(handle
);
327 ret
= ocfs2_set_inode_size(handle
, inode
, di_bh
,
332 ocfs2_commit_trans(osb
, handle
);
337 static int ocfs2_cow_file_pos(struct inode
*inode
,
338 struct buffer_head
*fe_bh
,
342 u32 phys
, cpos
= offset
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
343 unsigned int num_clusters
= 0;
344 unsigned int ext_flags
= 0;
347 * If the new offset is aligned to the range of the cluster, there is
348 * no space for ocfs2_zero_range_for_truncate to fill, so no need to
351 if ((offset
& (OCFS2_SB(inode
->i_sb
)->s_clustersize
- 1)) == 0)
354 status
= ocfs2_get_clusters(inode
, cpos
, &phys
,
355 &num_clusters
, &ext_flags
);
361 if (!(ext_flags
& OCFS2_EXT_REFCOUNTED
))
364 return ocfs2_refcount_cow(inode
, fe_bh
, cpos
, 1, cpos
+1);
370 static int ocfs2_orphan_for_truncate(struct ocfs2_super
*osb
,
372 struct buffer_head
*fe_bh
,
377 struct ocfs2_dinode
*di
;
383 * We need to CoW the cluster contains the offset if it is reflinked
384 * since we will call ocfs2_zero_range_for_truncate later which will
385 * write "0" from offset to the end of the cluster.
387 status
= ocfs2_cow_file_pos(inode
, fe_bh
, new_i_size
);
393 /* TODO: This needs to actually orphan the inode in this
396 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
397 if (IS_ERR(handle
)) {
398 status
= PTR_ERR(handle
);
403 status
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), fe_bh
,
404 OCFS2_JOURNAL_ACCESS_WRITE
);
411 * Do this before setting i_size.
413 cluster_bytes
= ocfs2_align_bytes_to_clusters(inode
->i_sb
, new_i_size
);
414 status
= ocfs2_zero_range_for_truncate(inode
, handle
, new_i_size
,
421 i_size_write(inode
, new_i_size
);
422 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
424 di
= (struct ocfs2_dinode
*) fe_bh
->b_data
;
425 di
->i_size
= cpu_to_le64(new_i_size
);
426 di
->i_ctime
= di
->i_mtime
= cpu_to_le64(inode
->i_ctime
.tv_sec
);
427 di
->i_ctime_nsec
= di
->i_mtime_nsec
= cpu_to_le32(inode
->i_ctime
.tv_nsec
);
429 ocfs2_journal_dirty(handle
, fe_bh
);
432 ocfs2_commit_trans(osb
, handle
);
439 static int ocfs2_truncate_file(struct inode
*inode
,
440 struct buffer_head
*di_bh
,
444 struct ocfs2_dinode
*fe
= NULL
;
445 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
447 mlog_entry("(inode = %llu, new_i_size = %llu\n",
448 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
449 (unsigned long long)new_i_size
);
451 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
452 * already validated it */
453 fe
= (struct ocfs2_dinode
*) di_bh
->b_data
;
455 mlog_bug_on_msg(le64_to_cpu(fe
->i_size
) != i_size_read(inode
),
456 "Inode %llu, inode i_size = %lld != di "
457 "i_size = %llu, i_flags = 0x%x\n",
458 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
460 (unsigned long long)le64_to_cpu(fe
->i_size
),
461 le32_to_cpu(fe
->i_flags
));
463 if (new_i_size
> le64_to_cpu(fe
->i_size
)) {
464 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
465 (unsigned long long)le64_to_cpu(fe
->i_size
),
466 (unsigned long long)new_i_size
);
472 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
473 (unsigned long long)le64_to_cpu(fe
->i_blkno
),
474 (unsigned long long)le64_to_cpu(fe
->i_size
),
475 (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
);
535 * extend file allocation only here.
536 * we'll update all the disk stuff, and oip->alloc_size
538 * expect stuff to be locked, a transaction started and enough data /
539 * metadata reservations in the contexts.
541 * Will return -EAGAIN, and a reason if a restart is needed.
542 * If passed in, *reason will always be set, even in error.
544 int ocfs2_add_inode_data(struct ocfs2_super
*osb
,
549 struct buffer_head
*fe_bh
,
551 struct ocfs2_alloc_context
*data_ac
,
552 struct ocfs2_alloc_context
*meta_ac
,
553 enum ocfs2_alloc_restarted
*reason_ret
)
556 struct ocfs2_extent_tree et
;
558 ocfs2_init_dinode_extent_tree(&et
, INODE_CACHE(inode
), fe_bh
);
559 ret
= ocfs2_add_clusters_in_btree(handle
, &et
, logical_offset
,
560 clusters_to_add
, mark_unwritten
,
561 data_ac
, meta_ac
, reason_ret
);
566 static int __ocfs2_extend_allocation(struct inode
*inode
, u32 logical_start
,
567 u32 clusters_to_add
, int mark_unwritten
)
570 int restart_func
= 0;
573 struct buffer_head
*bh
= NULL
;
574 struct ocfs2_dinode
*fe
= NULL
;
575 handle_t
*handle
= NULL
;
576 struct ocfs2_alloc_context
*data_ac
= NULL
;
577 struct ocfs2_alloc_context
*meta_ac
= NULL
;
578 enum ocfs2_alloc_restarted why
;
579 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
580 struct ocfs2_extent_tree et
;
583 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add
);
586 * This function only exists for file systems which don't
589 BUG_ON(mark_unwritten
&& !ocfs2_sparse_alloc(osb
));
591 status
= ocfs2_read_inode_block(inode
, &bh
);
596 fe
= (struct ocfs2_dinode
*) bh
->b_data
;
599 BUG_ON(le32_to_cpu(fe
->i_clusters
) != OCFS2_I(inode
)->ip_clusters
);
601 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
602 "clusters_to_add = %u\n",
603 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
604 (long long)i_size_read(inode
), le32_to_cpu(fe
->i_clusters
),
606 ocfs2_init_dinode_extent_tree(&et
, INODE_CACHE(inode
), bh
);
607 status
= ocfs2_lock_allocators(inode
, &et
, clusters_to_add
, 0,
614 credits
= ocfs2_calc_extend_credits(osb
->sb
, &fe
->id2
.i_list
,
616 handle
= ocfs2_start_trans(osb
, credits
);
617 if (IS_ERR(handle
)) {
618 status
= PTR_ERR(handle
);
624 restarted_transaction
:
625 status
= dquot_alloc_space_nodirty(inode
,
626 ocfs2_clusters_to_bytes(osb
->sb
, clusters_to_add
));
631 /* reserve a write to the file entry early on - that we if we
632 * run out of credits in the allocation path, we can still
634 status
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), bh
,
635 OCFS2_JOURNAL_ACCESS_WRITE
);
641 prev_clusters
= OCFS2_I(inode
)->ip_clusters
;
643 status
= ocfs2_add_inode_data(osb
,
653 if ((status
< 0) && (status
!= -EAGAIN
)) {
654 if (status
!= -ENOSPC
)
659 ocfs2_journal_dirty(handle
, bh
);
661 spin_lock(&OCFS2_I(inode
)->ip_lock
);
662 clusters_to_add
-= (OCFS2_I(inode
)->ip_clusters
- prev_clusters
);
663 spin_unlock(&OCFS2_I(inode
)->ip_lock
);
664 /* Release unused quota reservation */
665 dquot_free_space(inode
,
666 ocfs2_clusters_to_bytes(osb
->sb
, clusters_to_add
));
669 if (why
!= RESTART_NONE
&& clusters_to_add
) {
670 if (why
== RESTART_META
) {
671 mlog(0, "restarting function.\n");
675 BUG_ON(why
!= RESTART_TRANS
);
677 mlog(0, "restarting transaction.\n");
678 /* TODO: This can be more intelligent. */
679 credits
= ocfs2_calc_extend_credits(osb
->sb
,
682 status
= ocfs2_extend_trans(handle
, credits
);
684 /* handle still has to be committed at
690 goto restarted_transaction
;
694 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
695 le32_to_cpu(fe
->i_clusters
),
696 (unsigned long long)le64_to_cpu(fe
->i_size
));
697 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
698 OCFS2_I(inode
)->ip_clusters
, (long long)i_size_read(inode
));
701 if (status
< 0 && did_quota
)
702 dquot_free_space(inode
,
703 ocfs2_clusters_to_bytes(osb
->sb
, clusters_to_add
));
705 ocfs2_commit_trans(osb
, handle
);
709 ocfs2_free_alloc_context(data_ac
);
713 ocfs2_free_alloc_context(meta_ac
);
716 if ((!status
) && restart_func
) {
727 /* Some parts of this taken from generic_cont_expand, which turned out
728 * to be too fragile to do exactly what we need without us having to
729 * worry about recursive locking in ->write_begin() and ->write_end(). */
730 static int ocfs2_write_zero_page(struct inode
*inode
,
733 struct address_space
*mapping
= inode
->i_mapping
;
737 handle_t
*handle
= NULL
;
740 offset
= (size
& (PAGE_CACHE_SIZE
-1)); /* Within page */
741 /* ugh. in prepare/commit_write, if from==to==start of block, we
742 ** skip the prepare. make sure we never send an offset for the start
745 if ((offset
& (inode
->i_sb
->s_blocksize
- 1)) == 0) {
748 index
= size
>> PAGE_CACHE_SHIFT
;
750 page
= grab_cache_page(mapping
, index
);
757 ret
= ocfs2_prepare_write_nolock(inode
, page
, offset
, offset
);
763 if (ocfs2_should_order_data(inode
)) {
764 handle
= ocfs2_start_walk_page_trans(inode
, page
, offset
,
766 if (IS_ERR(handle
)) {
767 ret
= PTR_ERR(handle
);
773 /* must not update i_size! */
774 ret
= block_commit_write(page
, offset
, offset
);
781 ocfs2_commit_trans(OCFS2_SB(inode
->i_sb
), handle
);
784 page_cache_release(page
);
789 static int ocfs2_zero_extend(struct inode
*inode
,
794 struct super_block
*sb
= inode
->i_sb
;
796 start_off
= ocfs2_align_bytes_to_blocks(sb
, i_size_read(inode
));
797 while (start_off
< zero_to_size
) {
798 ret
= ocfs2_write_zero_page(inode
, start_off
);
804 start_off
+= sb
->s_blocksize
;
807 * Very large extends have the potential to lock up
808 * the cpu for extended periods of time.
817 int ocfs2_extend_no_holes(struct inode
*inode
, u64 new_i_size
, u64 zero_to
)
821 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
823 clusters_to_add
= ocfs2_clusters_for_bytes(inode
->i_sb
, new_i_size
);
824 if (clusters_to_add
< oi
->ip_clusters
)
827 clusters_to_add
-= oi
->ip_clusters
;
829 if (clusters_to_add
) {
830 ret
= __ocfs2_extend_allocation(inode
, oi
->ip_clusters
,
839 * Call this even if we don't add any clusters to the tree. We
840 * still need to zero the area between the old i_size and the
843 ret
= ocfs2_zero_extend(inode
, zero_to
);
851 static int ocfs2_extend_file(struct inode
*inode
,
852 struct buffer_head
*di_bh
,
856 struct ocfs2_inode_info
*oi
= OCFS2_I(inode
);
860 /* setattr sometimes calls us like this. */
864 if (i_size_read(inode
) == new_i_size
)
866 BUG_ON(new_i_size
< i_size_read(inode
));
869 * Fall through for converting inline data, even if the fs
870 * supports sparse files.
872 * The check for inline data here is legal - nobody can add
873 * the feature since we have i_mutex. We must check it again
874 * after acquiring ip_alloc_sem though, as paths like mmap
875 * might have raced us to converting the inode to extents.
877 if (!(oi
->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
878 && ocfs2_sparse_alloc(OCFS2_SB(inode
->i_sb
)))
879 goto out_update_size
;
882 * The alloc sem blocks people in read/write from reading our
883 * allocation until we're done changing it. We depend on
884 * i_mutex to block other extend/truncate calls while we're
887 down_write(&oi
->ip_alloc_sem
);
889 if (oi
->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
891 * We can optimize small extends by keeping the inodes
894 if (ocfs2_size_fits_inline_data(di_bh
, new_i_size
)) {
895 up_write(&oi
->ip_alloc_sem
);
896 goto out_update_size
;
899 ret
= ocfs2_convert_inline_data_to_extents(inode
, di_bh
);
901 up_write(&oi
->ip_alloc_sem
);
908 if (!ocfs2_sparse_alloc(OCFS2_SB(inode
->i_sb
)))
909 ret
= ocfs2_extend_no_holes(inode
, new_i_size
, new_i_size
);
911 up_write(&oi
->ip_alloc_sem
);
919 ret
= ocfs2_simple_size_update(inode
, di_bh
, new_i_size
);
927 int ocfs2_setattr(struct dentry
*dentry
, struct iattr
*attr
)
929 int status
= 0, size_change
;
930 struct inode
*inode
= dentry
->d_inode
;
931 struct super_block
*sb
= inode
->i_sb
;
932 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
933 struct buffer_head
*bh
= NULL
;
934 handle_t
*handle
= NULL
;
935 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
938 mlog_entry("(0x%p, '%.*s')\n", dentry
,
939 dentry
->d_name
.len
, dentry
->d_name
.name
);
941 /* ensuring we don't even attempt to truncate a symlink */
942 if (S_ISLNK(inode
->i_mode
))
943 attr
->ia_valid
&= ~ATTR_SIZE
;
945 if (attr
->ia_valid
& ATTR_MODE
)
946 mlog(0, "mode change: %d\n", attr
->ia_mode
);
947 if (attr
->ia_valid
& ATTR_UID
)
948 mlog(0, "uid change: %d\n", attr
->ia_uid
);
949 if (attr
->ia_valid
& ATTR_GID
)
950 mlog(0, "gid change: %d\n", attr
->ia_gid
);
951 if (attr
->ia_valid
& ATTR_SIZE
)
952 mlog(0, "size change...\n");
953 if (attr
->ia_valid
& (ATTR_ATIME
| ATTR_MTIME
| ATTR_CTIME
))
954 mlog(0, "time change...\n");
956 #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
957 | ATTR_GID | ATTR_UID | ATTR_MODE)
958 if (!(attr
->ia_valid
& OCFS2_VALID_ATTRS
)) {
959 mlog(0, "can't handle attrs: 0x%x\n", attr
->ia_valid
);
963 status
= inode_change_ok(inode
, attr
);
967 if (is_quota_modification(inode
, attr
))
968 dquot_initialize(inode
);
969 size_change
= S_ISREG(inode
->i_mode
) && attr
->ia_valid
& ATTR_SIZE
;
971 status
= ocfs2_rw_lock(inode
, 1);
978 status
= ocfs2_inode_lock(inode
, &bh
, 1);
980 if (status
!= -ENOENT
)
985 if (size_change
&& attr
->ia_size
!= i_size_read(inode
)) {
986 status
= inode_newsize_ok(inode
, attr
->ia_size
);
990 if (i_size_read(inode
) > attr
->ia_size
) {
991 if (ocfs2_should_order_data(inode
)) {
992 status
= ocfs2_begin_ordered_truncate(inode
,
997 status
= ocfs2_truncate_file(inode
, bh
, attr
->ia_size
);
999 status
= ocfs2_extend_file(inode
, bh
, attr
->ia_size
);
1001 if (status
!= -ENOSPC
)
1008 if ((attr
->ia_valid
& ATTR_UID
&& attr
->ia_uid
!= inode
->i_uid
) ||
1009 (attr
->ia_valid
& ATTR_GID
&& attr
->ia_gid
!= inode
->i_gid
)) {
1011 * Gather pointers to quota structures so that allocation /
1012 * freeing of quota structures happens here and not inside
1013 * dquot_transfer() where we have problems with lock ordering
1015 if (attr
->ia_valid
& ATTR_UID
&& attr
->ia_uid
!= inode
->i_uid
1016 && OCFS2_HAS_RO_COMPAT_FEATURE(sb
,
1017 OCFS2_FEATURE_RO_COMPAT_USRQUOTA
)) {
1018 transfer_to
[USRQUOTA
] = dqget(sb
, attr
->ia_uid
,
1020 if (!transfer_to
[USRQUOTA
]) {
1025 if (attr
->ia_valid
& ATTR_GID
&& attr
->ia_gid
!= inode
->i_gid
1026 && OCFS2_HAS_RO_COMPAT_FEATURE(sb
,
1027 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA
)) {
1028 transfer_to
[GRPQUOTA
] = dqget(sb
, attr
->ia_gid
,
1030 if (!transfer_to
[GRPQUOTA
]) {
1035 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
+
1036 2 * ocfs2_quota_trans_credits(sb
));
1037 if (IS_ERR(handle
)) {
1038 status
= PTR_ERR(handle
);
1042 status
= __dquot_transfer(inode
, transfer_to
);
1046 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1047 if (IS_ERR(handle
)) {
1048 status
= PTR_ERR(handle
);
1055 * This will intentionally not wind up calling simple_setsize(),
1056 * since all the work for a size change has been done above.
1057 * Otherwise, we could get into problems with truncate as
1058 * ip_alloc_sem is used there to protect against i_size
1061 status
= inode_setattr(inode
, attr
);
1067 status
= ocfs2_mark_inode_dirty(handle
, inode
, bh
);
1072 ocfs2_commit_trans(osb
, handle
);
1074 ocfs2_inode_unlock(inode
, 1);
1077 ocfs2_rw_unlock(inode
, 1);
1081 /* Release quota pointers in case we acquired them */
1082 for (qtype
= 0; qtype
< MAXQUOTAS
; qtype
++)
1083 dqput(transfer_to
[qtype
]);
1085 if (!status
&& attr
->ia_valid
& ATTR_MODE
) {
1086 status
= ocfs2_acl_chmod(inode
);
1095 int ocfs2_getattr(struct vfsmount
*mnt
,
1096 struct dentry
*dentry
,
1099 struct inode
*inode
= dentry
->d_inode
;
1100 struct super_block
*sb
= dentry
->d_inode
->i_sb
;
1101 struct ocfs2_super
*osb
= sb
->s_fs_info
;
1106 err
= ocfs2_inode_revalidate(dentry
);
1113 generic_fillattr(inode
, stat
);
1115 /* We set the blksize from the cluster size for performance */
1116 stat
->blksize
= osb
->s_clustersize
;
1124 int ocfs2_permission(struct inode
*inode
, int mask
)
1130 ret
= ocfs2_inode_lock(inode
, NULL
, 0);
1137 ret
= generic_permission(inode
, mask
, ocfs2_check_acl
);
1139 ocfs2_inode_unlock(inode
, 0);
1145 static int __ocfs2_write_remove_suid(struct inode
*inode
,
1146 struct buffer_head
*bh
)
1150 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1151 struct ocfs2_dinode
*di
;
1153 mlog_entry("(Inode %llu, mode 0%o)\n",
1154 (unsigned long long)OCFS2_I(inode
)->ip_blkno
, inode
->i_mode
);
1156 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1157 if (IS_ERR(handle
)) {
1158 ret
= PTR_ERR(handle
);
1163 ret
= ocfs2_journal_access_di(handle
, INODE_CACHE(inode
), bh
,
1164 OCFS2_JOURNAL_ACCESS_WRITE
);
1170 inode
->i_mode
&= ~S_ISUID
;
1171 if ((inode
->i_mode
& S_ISGID
) && (inode
->i_mode
& S_IXGRP
))
1172 inode
->i_mode
&= ~S_ISGID
;
1174 di
= (struct ocfs2_dinode
*) bh
->b_data
;
1175 di
->i_mode
= cpu_to_le16(inode
->i_mode
);
1177 ocfs2_journal_dirty(handle
, bh
);
1180 ocfs2_commit_trans(osb
, handle
);
1187 * Will look for holes and unwritten extents in the range starting at
1188 * pos for count bytes (inclusive).
1190 static int ocfs2_check_range_for_holes(struct inode
*inode
, loff_t pos
,
1194 unsigned int extent_flags
;
1195 u32 cpos
, clusters
, extent_len
, phys_cpos
;
1196 struct super_block
*sb
= inode
->i_sb
;
1198 cpos
= pos
>> OCFS2_SB(sb
)->s_clustersize_bits
;
1199 clusters
= ocfs2_clusters_for_bytes(sb
, pos
+ count
) - cpos
;
1202 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
, &extent_len
,
1209 if (phys_cpos
== 0 || (extent_flags
& OCFS2_EXT_UNWRITTEN
)) {
1214 if (extent_len
> clusters
)
1215 extent_len
= clusters
;
1217 clusters
-= extent_len
;
1224 static int ocfs2_write_remove_suid(struct inode
*inode
)
1227 struct buffer_head
*bh
= NULL
;
1229 ret
= ocfs2_read_inode_block(inode
, &bh
);
1235 ret
= __ocfs2_write_remove_suid(inode
, bh
);
1242 * Allocate enough extents to cover the region starting at byte offset
1243 * start for len bytes. Existing extents are skipped, any extents
1244 * added are marked as "unwritten".
1246 static int ocfs2_allocate_unwritten_extents(struct inode
*inode
,
1250 u32 cpos
, phys_cpos
, clusters
, alloc_size
;
1251 u64 end
= start
+ len
;
1252 struct buffer_head
*di_bh
= NULL
;
1254 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1255 ret
= ocfs2_read_inode_block(inode
, &di_bh
);
1262 * Nothing to do if the requested reservation range
1263 * fits within the inode.
1265 if (ocfs2_size_fits_inline_data(di_bh
, end
))
1268 ret
= ocfs2_convert_inline_data_to_extents(inode
, di_bh
);
1276 * We consider both start and len to be inclusive.
1278 cpos
= start
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
1279 clusters
= ocfs2_clusters_for_bytes(inode
->i_sb
, start
+ len
);
1283 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
,
1291 * Hole or existing extent len can be arbitrary, so
1292 * cap it to our own allocation request.
1294 if (alloc_size
> clusters
)
1295 alloc_size
= clusters
;
1299 * We already have an allocation at this
1300 * region so we can safely skip it.
1305 ret
= __ocfs2_extend_allocation(inode
, cpos
, alloc_size
, 1);
1314 clusters
-= alloc_size
;
1325 * Truncate a byte range, avoiding pages within partial clusters. This
1326 * preserves those pages for the zeroing code to write to.
1328 static void ocfs2_truncate_cluster_pages(struct inode
*inode
, u64 byte_start
,
1331 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1333 struct address_space
*mapping
= inode
->i_mapping
;
1335 start
= (loff_t
)ocfs2_align_bytes_to_clusters(inode
->i_sb
, byte_start
);
1336 end
= byte_start
+ byte_len
;
1337 end
= end
& ~(osb
->s_clustersize
- 1);
1340 unmap_mapping_range(mapping
, start
, end
- start
, 0);
1341 truncate_inode_pages_range(mapping
, start
, end
- 1);
1345 static int ocfs2_zero_partial_clusters(struct inode
*inode
,
1349 u64 tmpend
, end
= start
+ len
;
1350 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1351 unsigned int csize
= osb
->s_clustersize
;
1355 * The "start" and "end" values are NOT necessarily part of
1356 * the range whose allocation is being deleted. Rather, this
1357 * is what the user passed in with the request. We must zero
1358 * partial clusters here. There's no need to worry about
1359 * physical allocation - the zeroing code knows to skip holes.
1361 mlog(0, "byte start: %llu, end: %llu\n",
1362 (unsigned long long)start
, (unsigned long long)end
);
1365 * If both edges are on a cluster boundary then there's no
1366 * zeroing required as the region is part of the allocation to
1369 if ((start
& (csize
- 1)) == 0 && (end
& (csize
- 1)) == 0)
1372 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1373 if (IS_ERR(handle
)) {
1374 ret
= PTR_ERR(handle
);
1380 * We want to get the byte offset of the end of the 1st cluster.
1382 tmpend
= (u64
)osb
->s_clustersize
+ (start
& ~(osb
->s_clustersize
- 1));
1386 mlog(0, "1st range: start: %llu, tmpend: %llu\n",
1387 (unsigned long long)start
, (unsigned long long)tmpend
);
1389 ret
= ocfs2_zero_range_for_truncate(inode
, handle
, start
, tmpend
);
1395 * This may make start and end equal, but the zeroing
1396 * code will skip any work in that case so there's no
1397 * need to catch it up here.
1399 start
= end
& ~(osb
->s_clustersize
- 1);
1401 mlog(0, "2nd range: start: %llu, end: %llu\n",
1402 (unsigned long long)start
, (unsigned long long)end
);
1404 ret
= ocfs2_zero_range_for_truncate(inode
, handle
, start
, end
);
1409 ocfs2_commit_trans(osb
, handle
);
1414 static int ocfs2_find_rec(struct ocfs2_extent_list
*el
, u32 pos
)
1417 struct ocfs2_extent_rec
*rec
= NULL
;
1419 for (i
= le16_to_cpu(el
->l_next_free_rec
) - 1; i
>= 0; i
--) {
1421 rec
= &el
->l_recs
[i
];
1423 if (le32_to_cpu(rec
->e_cpos
) < pos
)
1431 * Helper to calculate the punching pos and length in one run, we handle the
1432 * following three cases in order:
1434 * - remove the entire record
1435 * - remove a partial record
1436 * - no record needs to be removed (hole-punching completed)
1438 static void ocfs2_calc_trunc_pos(struct inode
*inode
,
1439 struct ocfs2_extent_list
*el
,
1440 struct ocfs2_extent_rec
*rec
,
1441 u32 trunc_start
, u32
*trunc_cpos
,
1442 u32
*trunc_len
, u32
*trunc_end
,
1443 u64
*blkno
, int *done
)
1448 range
= le32_to_cpu(rec
->e_cpos
) + ocfs2_rec_clusters(el
, rec
);
1450 if (le32_to_cpu(rec
->e_cpos
) >= trunc_start
) {
1451 *trunc_cpos
= le32_to_cpu(rec
->e_cpos
);
1453 * Skip holes if any.
1455 if (range
< *trunc_end
)
1457 *trunc_len
= *trunc_end
- le32_to_cpu(rec
->e_cpos
);
1458 *blkno
= le64_to_cpu(rec
->e_blkno
);
1459 *trunc_end
= le32_to_cpu(rec
->e_cpos
);
1460 } else if (range
> trunc_start
) {
1461 *trunc_cpos
= trunc_start
;
1462 *trunc_len
= *trunc_end
- trunc_start
;
1463 coff
= trunc_start
- le32_to_cpu(rec
->e_cpos
);
1464 *blkno
= le64_to_cpu(rec
->e_blkno
) +
1465 ocfs2_clusters_to_blocks(inode
->i_sb
, coff
);
1466 *trunc_end
= trunc_start
;
1469 * It may have two following possibilities:
1471 * - last record has been removed
1472 * - trunc_start was within a hole
1474 * both two cases mean the completion of hole punching.
1482 static int ocfs2_remove_inode_range(struct inode
*inode
,
1483 struct buffer_head
*di_bh
, u64 byte_start
,
1486 int ret
= 0, flags
= 0, done
= 0, i
;
1487 u32 trunc_start
, trunc_len
, trunc_end
, trunc_cpos
, phys_cpos
;
1489 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1490 struct ocfs2_cached_dealloc_ctxt dealloc
;
1491 struct address_space
*mapping
= inode
->i_mapping
;
1492 struct ocfs2_extent_tree et
;
1493 struct ocfs2_path
*path
= NULL
;
1494 struct ocfs2_extent_list
*el
= NULL
;
1495 struct ocfs2_extent_rec
*rec
= NULL
;
1496 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
1497 u64 blkno
, refcount_loc
= le64_to_cpu(di
->i_refcount_loc
);
1499 ocfs2_init_dinode_extent_tree(&et
, INODE_CACHE(inode
), di_bh
);
1500 ocfs2_init_dealloc_ctxt(&dealloc
);
1505 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1506 ret
= ocfs2_truncate_inline(inode
, di_bh
, byte_start
,
1507 byte_start
+ byte_len
, 0);
1513 * There's no need to get fancy with the page cache
1514 * truncate of an inline-data inode. We're talking
1515 * about less than a page here, which will be cached
1516 * in the dinode buffer anyway.
1518 unmap_mapping_range(mapping
, 0, 0, 0);
1519 truncate_inode_pages(mapping
, 0);
1524 * For reflinks, we may need to CoW 2 clusters which might be
1525 * partially zero'd later, if hole's start and end offset were
1526 * within one cluster(means is not exactly aligned to clustersize).
1529 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_HAS_REFCOUNT_FL
) {
1531 ret
= ocfs2_cow_file_pos(inode
, di_bh
, byte_start
);
1537 ret
= ocfs2_cow_file_pos(inode
, di_bh
, byte_start
+ byte_len
);
1544 trunc_start
= ocfs2_clusters_for_bytes(osb
->sb
, byte_start
);
1545 trunc_end
= (byte_start
+ byte_len
) >> osb
->s_clustersize_bits
;
1546 cluster_in_el
= trunc_end
;
1548 mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, cend: %u\n",
1549 (unsigned long long)OCFS2_I(inode
)->ip_blkno
,
1550 (unsigned long long)byte_start
,
1551 (unsigned long long)byte_len
, trunc_start
, trunc_end
);
1553 ret
= ocfs2_zero_partial_clusters(inode
, byte_start
, byte_len
);
1559 path
= ocfs2_new_path_from_et(&et
);
1566 while (trunc_end
> trunc_start
) {
1568 ret
= ocfs2_find_path(INODE_CACHE(inode
), path
,
1575 el
= path_leaf_el(path
);
1577 i
= ocfs2_find_rec(el
, trunc_end
);
1579 * Need to go to previous extent block.
1582 if (path
->p_tree_depth
== 0)
1585 ret
= ocfs2_find_cpos_for_left_leaf(inode
->i_sb
,
1594 * We've reached the leftmost extent block,
1595 * it's safe to leave.
1597 if (cluster_in_el
== 0)
1601 * The 'pos' searched for previous extent block is
1602 * always one cluster less than actual trunc_end.
1604 trunc_end
= cluster_in_el
+ 1;
1606 ocfs2_reinit_path(path
, 1);
1611 rec
= &el
->l_recs
[i
];
1613 ocfs2_calc_trunc_pos(inode
, el
, rec
, trunc_start
, &trunc_cpos
,
1614 &trunc_len
, &trunc_end
, &blkno
, &done
);
1618 flags
= rec
->e_flags
;
1619 phys_cpos
= ocfs2_blocks_to_clusters(inode
->i_sb
, blkno
);
1621 ret
= ocfs2_remove_btree_range(inode
, &et
, trunc_cpos
,
1622 phys_cpos
, trunc_len
, flags
,
1623 &dealloc
, refcount_loc
);
1629 cluster_in_el
= trunc_end
;
1631 ocfs2_reinit_path(path
, 1);
1634 ocfs2_truncate_cluster_pages(inode
, byte_start
, byte_len
);
1637 ocfs2_schedule_truncate_log_flush(osb
, 1);
1638 ocfs2_run_deallocs(osb
, &dealloc
);
1644 * Parts of this function taken from xfs_change_file_space()
1646 static int __ocfs2_change_file_space(struct file
*file
, struct inode
*inode
,
1647 loff_t f_pos
, unsigned int cmd
,
1648 struct ocfs2_space_resv
*sr
,
1654 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1655 struct buffer_head
*di_bh
= NULL
;
1657 unsigned long long max_off
= inode
->i_sb
->s_maxbytes
;
1659 if (ocfs2_is_hard_readonly(osb
) || ocfs2_is_soft_readonly(osb
))
1662 mutex_lock(&inode
->i_mutex
);
1665 * This prevents concurrent writes on other nodes
1667 ret
= ocfs2_rw_lock(inode
, 1);
1673 ret
= ocfs2_inode_lock(inode
, &di_bh
, 1);
1679 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
)) {
1681 goto out_inode_unlock
;
1684 switch (sr
->l_whence
) {
1685 case 0: /*SEEK_SET*/
1687 case 1: /*SEEK_CUR*/
1688 sr
->l_start
+= f_pos
;
1690 case 2: /*SEEK_END*/
1691 sr
->l_start
+= i_size_read(inode
);
1695 goto out_inode_unlock
;
1699 llen
= sr
->l_len
> 0 ? sr
->l_len
- 1 : sr
->l_len
;
1702 || sr
->l_start
> max_off
1703 || (sr
->l_start
+ llen
) < 0
1704 || (sr
->l_start
+ llen
) > max_off
) {
1706 goto out_inode_unlock
;
1708 size
= sr
->l_start
+ sr
->l_len
;
1710 if (cmd
== OCFS2_IOC_RESVSP
|| cmd
== OCFS2_IOC_RESVSP64
) {
1711 if (sr
->l_len
<= 0) {
1713 goto out_inode_unlock
;
1717 if (file
&& should_remove_suid(file
->f_path
.dentry
)) {
1718 ret
= __ocfs2_write_remove_suid(inode
, di_bh
);
1721 goto out_inode_unlock
;
1725 down_write(&OCFS2_I(inode
)->ip_alloc_sem
);
1727 case OCFS2_IOC_RESVSP
:
1728 case OCFS2_IOC_RESVSP64
:
1730 * This takes unsigned offsets, but the signed ones we
1731 * pass have been checked against overflow above.
1733 ret
= ocfs2_allocate_unwritten_extents(inode
, sr
->l_start
,
1736 case OCFS2_IOC_UNRESVSP
:
1737 case OCFS2_IOC_UNRESVSP64
:
1738 ret
= ocfs2_remove_inode_range(inode
, di_bh
, sr
->l_start
,
1744 up_write(&OCFS2_I(inode
)->ip_alloc_sem
);
1747 goto out_inode_unlock
;
1751 * We update c/mtime for these changes
1753 handle
= ocfs2_start_trans(osb
, OCFS2_INODE_UPDATE_CREDITS
);
1754 if (IS_ERR(handle
)) {
1755 ret
= PTR_ERR(handle
);
1757 goto out_inode_unlock
;
1760 if (change_size
&& i_size_read(inode
) < size
)
1761 i_size_write(inode
, size
);
1763 inode
->i_ctime
= inode
->i_mtime
= CURRENT_TIME
;
1764 ret
= ocfs2_mark_inode_dirty(handle
, inode
, di_bh
);
1768 ocfs2_commit_trans(osb
, handle
);
1772 ocfs2_inode_unlock(inode
, 1);
1774 ocfs2_rw_unlock(inode
, 1);
1777 mutex_unlock(&inode
->i_mutex
);
1781 int ocfs2_change_file_space(struct file
*file
, unsigned int cmd
,
1782 struct ocfs2_space_resv
*sr
)
1784 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1785 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1787 if ((cmd
== OCFS2_IOC_RESVSP
|| cmd
== OCFS2_IOC_RESVSP64
) &&
1788 !ocfs2_writes_unwritten_extents(osb
))
1790 else if ((cmd
== OCFS2_IOC_UNRESVSP
|| cmd
== OCFS2_IOC_UNRESVSP64
) &&
1791 !ocfs2_sparse_alloc(osb
))
1794 if (!S_ISREG(inode
->i_mode
))
1797 if (!(file
->f_mode
& FMODE_WRITE
))
1800 return __ocfs2_change_file_space(file
, inode
, file
->f_pos
, cmd
, sr
, 0);
1803 static long ocfs2_fallocate(struct inode
*inode
, int mode
, loff_t offset
,
1806 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
1807 struct ocfs2_space_resv sr
;
1808 int change_size
= 1;
1810 if (!ocfs2_writes_unwritten_extents(osb
))
1813 if (S_ISDIR(inode
->i_mode
))
1816 if (mode
& FALLOC_FL_KEEP_SIZE
)
1820 sr
.l_start
= (s64
)offset
;
1821 sr
.l_len
= (s64
)len
;
1823 return __ocfs2_change_file_space(NULL
, inode
, offset
,
1824 OCFS2_IOC_RESVSP64
, &sr
, change_size
);
1827 int ocfs2_check_range_for_refcount(struct inode
*inode
, loff_t pos
,
1831 unsigned int extent_flags
;
1832 u32 cpos
, clusters
, extent_len
, phys_cpos
;
1833 struct super_block
*sb
= inode
->i_sb
;
1835 if (!ocfs2_refcount_tree(OCFS2_SB(inode
->i_sb
)) ||
1836 !(OCFS2_I(inode
)->ip_dyn_features
& OCFS2_HAS_REFCOUNT_FL
) ||
1837 OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
1840 cpos
= pos
>> OCFS2_SB(sb
)->s_clustersize_bits
;
1841 clusters
= ocfs2_clusters_for_bytes(sb
, pos
+ count
) - cpos
;
1844 ret
= ocfs2_get_clusters(inode
, cpos
, &phys_cpos
, &extent_len
,
1851 if (phys_cpos
&& (extent_flags
& OCFS2_EXT_REFCOUNTED
)) {
1856 if (extent_len
> clusters
)
1857 extent_len
= clusters
;
1859 clusters
-= extent_len
;
1866 static int ocfs2_prepare_inode_for_refcount(struct inode
*inode
,
1867 loff_t pos
, size_t count
,
1871 struct buffer_head
*di_bh
= NULL
;
1872 u32 cpos
= pos
>> OCFS2_SB(inode
->i_sb
)->s_clustersize_bits
;
1874 ocfs2_clusters_for_bytes(inode
->i_sb
, pos
+ count
) - cpos
;
1876 ret
= ocfs2_inode_lock(inode
, &di_bh
, 1);
1884 ret
= ocfs2_refcount_cow(inode
, di_bh
, cpos
, clusters
, UINT_MAX
);
1892 static int ocfs2_prepare_inode_for_write(struct dentry
*dentry
,
1899 int ret
= 0, meta_level
= 0;
1900 struct inode
*inode
= dentry
->d_inode
;
1901 loff_t saved_pos
, end
;
1904 * We start with a read level meta lock and only jump to an ex
1905 * if we need to make modifications here.
1908 ret
= ocfs2_inode_lock(inode
, NULL
, meta_level
);
1915 /* Clear suid / sgid if necessary. We do this here
1916 * instead of later in the write path because
1917 * remove_suid() calls ->setattr without any hint that
1918 * we may have already done our cluster locking. Since
1919 * ocfs2_setattr() *must* take cluster locks to
1920 * proceeed, this will lead us to recursively lock the
1921 * inode. There's also the dinode i_size state which
1922 * can be lost via setattr during extending writes (we
1923 * set inode->i_size at the end of a write. */
1924 if (should_remove_suid(dentry
)) {
1925 if (meta_level
== 0) {
1926 ocfs2_inode_unlock(inode
, meta_level
);
1931 ret
= ocfs2_write_remove_suid(inode
);
1938 /* work on a copy of ppos until we're sure that we won't have
1939 * to recalculate it due to relocking. */
1941 saved_pos
= i_size_read(inode
);
1942 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos
);
1947 end
= saved_pos
+ count
;
1949 ret
= ocfs2_check_range_for_refcount(inode
, saved_pos
, count
);
1951 ocfs2_inode_unlock(inode
, meta_level
);
1954 ret
= ocfs2_prepare_inode_for_refcount(inode
,
1970 * Skip the O_DIRECT checks if we don't need
1973 if (!direct_io
|| !(*direct_io
))
1977 * There's no sane way to do direct writes to an inode
1980 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1986 * Allowing concurrent direct writes means
1987 * i_size changes wouldn't be synchronized, so
1988 * one node could wind up truncating another
1991 if (end
> i_size_read(inode
)) {
1997 * We don't fill holes during direct io, so
1998 * check for them here. If any are found, the
1999 * caller will have to retake some cluster
2000 * locks and initiate the io as buffered.
2002 ret
= ocfs2_check_range_for_holes(inode
, saved_pos
, count
);
2015 if (meta_level
>= 0)
2016 ocfs2_inode_unlock(inode
, meta_level
);
2022 static ssize_t
ocfs2_file_aio_write(struct kiocb
*iocb
,
2023 const struct iovec
*iov
,
2024 unsigned long nr_segs
,
2027 int ret
, direct_io
, appending
, rw_level
, have_alloc_sem
= 0;
2028 int can_do_direct
, has_refcount
= 0;
2029 ssize_t written
= 0;
2030 size_t ocount
; /* original count */
2031 size_t count
; /* after file limit checks */
2032 loff_t old_size
, *ppos
= &iocb
->ki_pos
;
2034 struct file
*file
= iocb
->ki_filp
;
2035 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
2036 struct ocfs2_super
*osb
= OCFS2_SB(inode
->i_sb
);
2038 mlog_entry("(0x%p, %u, '%.*s')\n", file
,
2039 (unsigned int)nr_segs
,
2040 file
->f_path
.dentry
->d_name
.len
,
2041 file
->f_path
.dentry
->d_name
.name
);
2043 if (iocb
->ki_left
== 0)
2046 vfs_check_frozen(inode
->i_sb
, SB_FREEZE_WRITE
);
2048 appending
= file
->f_flags
& O_APPEND
? 1 : 0;
2049 direct_io
= file
->f_flags
& O_DIRECT
? 1 : 0;
2051 mutex_lock(&inode
->i_mutex
);
2054 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
2056 down_read(&inode
->i_alloc_sem
);
2060 /* concurrent O_DIRECT writes are allowed */
2061 rw_level
= !direct_io
;
2062 ret
= ocfs2_rw_lock(inode
, rw_level
);
2068 can_do_direct
= direct_io
;
2069 ret
= ocfs2_prepare_inode_for_write(file
->f_path
.dentry
, ppos
,
2070 iocb
->ki_left
, appending
,
2071 &can_do_direct
, &has_refcount
);
2078 * We can't complete the direct I/O as requested, fall back to
2081 if (direct_io
&& !can_do_direct
) {
2082 ocfs2_rw_unlock(inode
, rw_level
);
2083 up_read(&inode
->i_alloc_sem
);
2093 * To later detect whether a journal commit for sync writes is
2094 * necessary, we sample i_size, and cluster count here.
2096 old_size
= i_size_read(inode
);
2097 old_clusters
= OCFS2_I(inode
)->ip_clusters
;
2099 /* communicate with ocfs2_dio_end_io */
2100 ocfs2_iocb_set_rw_locked(iocb
, rw_level
);
2102 ret
= generic_segment_checks(iov
, &nr_segs
, &ocount
,
2108 ret
= generic_write_checks(file
, ppos
, &count
,
2109 S_ISBLK(inode
->i_mode
));
2114 written
= generic_file_direct_write(iocb
, iov
, &nr_segs
, *ppos
,
2115 ppos
, count
, ocount
);
2118 * direct write may have instantiated a few
2119 * blocks outside i_size. Trim these off again.
2120 * Don't need i_size_read because we hold i_mutex.
2122 * XXX(hch): this looks buggy because ocfs2 did not
2123 * actually implement ->truncate. Take a look at
2124 * the new truncate sequence and update this accordingly
2126 if (*ppos
+ count
> inode
->i_size
)
2127 simple_setsize(inode
, inode
->i_size
);
2132 current
->backing_dev_info
= file
->f_mapping
->backing_dev_info
;
2133 written
= generic_file_buffered_write(iocb
, iov
, nr_segs
, *ppos
,
2135 current
->backing_dev_info
= NULL
;
2139 /* buffered aio wouldn't have proper lock coverage today */
2140 BUG_ON(ret
== -EIOCBQUEUED
&& !(file
->f_flags
& O_DIRECT
));
2142 if (((file
->f_flags
& O_DSYNC
) && !direct_io
) || IS_SYNC(inode
) ||
2143 ((file
->f_flags
& O_DIRECT
) && has_refcount
)) {
2144 ret
= filemap_fdatawrite_range(file
->f_mapping
, pos
,
2149 if (!ret
&& ((old_size
!= i_size_read(inode
)) ||
2150 (old_clusters
!= OCFS2_I(inode
)->ip_clusters
) ||
2152 ret
= jbd2_journal_force_commit(osb
->journal
->j_journal
);
2158 ret
= filemap_fdatawait_range(file
->f_mapping
, pos
,
2163 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
2164 * function pointer which is called when o_direct io completes so that
2165 * it can unlock our rw lock. (it's the clustered equivalent of
2166 * i_alloc_sem; protects truncate from racing with pending ios).
2167 * Unfortunately there are error cases which call end_io and others
2168 * that don't. so we don't have to unlock the rw_lock if either an
2169 * async dio is going to do it in the future or an end_io after an
2170 * error has already done it.
2172 if ((ret
== -EIOCBQUEUED
) || (!ocfs2_iocb_is_rw_locked(iocb
))) {
2179 ocfs2_rw_unlock(inode
, rw_level
);
2183 up_read(&inode
->i_alloc_sem
);
2185 mutex_unlock(&inode
->i_mutex
);
2193 static int ocfs2_splice_to_file(struct pipe_inode_info
*pipe
,
2195 struct splice_desc
*sd
)
2199 ret
= ocfs2_prepare_inode_for_write(out
->f_path
.dentry
, &sd
->pos
,
2200 sd
->total_len
, 0, NULL
, NULL
);
2206 return splice_from_pipe_feed(pipe
, sd
, pipe_to_file
);
2209 static ssize_t
ocfs2_file_splice_write(struct pipe_inode_info
*pipe
,
2216 struct address_space
*mapping
= out
->f_mapping
;
2217 struct inode
*inode
= mapping
->host
;
2218 struct splice_desc sd
= {
2225 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out
, pipe
,
2227 out
->f_path
.dentry
->d_name
.len
,
2228 out
->f_path
.dentry
->d_name
.name
);
2231 mutex_lock_nested(&pipe
->inode
->i_mutex
, I_MUTEX_PARENT
);
2233 splice_from_pipe_begin(&sd
);
2235 ret
= splice_from_pipe_next(pipe
, &sd
);
2239 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_CHILD
);
2240 ret
= ocfs2_rw_lock(inode
, 1);
2244 ret
= ocfs2_splice_to_file(pipe
, out
, &sd
);
2245 ocfs2_rw_unlock(inode
, 1);
2247 mutex_unlock(&inode
->i_mutex
);
2249 splice_from_pipe_end(pipe
, &sd
);
2252 mutex_unlock(&pipe
->inode
->i_mutex
);
2255 ret
= sd
.num_spliced
;
2258 unsigned long nr_pages
;
2261 nr_pages
= (ret
+ PAGE_CACHE_SIZE
- 1) >> PAGE_CACHE_SHIFT
;
2263 err
= generic_write_sync(out
, *ppos
, ret
);
2269 balance_dirty_pages_ratelimited_nr(mapping
, nr_pages
);
2276 static ssize_t
ocfs2_file_splice_read(struct file
*in
,
2278 struct pipe_inode_info
*pipe
,
2282 int ret
= 0, lock_level
= 0;
2283 struct inode
*inode
= in
->f_path
.dentry
->d_inode
;
2285 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in
, pipe
,
2287 in
->f_path
.dentry
->d_name
.len
,
2288 in
->f_path
.dentry
->d_name
.name
);
2291 * See the comment in ocfs2_file_aio_read()
2293 ret
= ocfs2_inode_lock_atime(inode
, in
->f_vfsmnt
, &lock_level
);
2298 ocfs2_inode_unlock(inode
, lock_level
);
2300 ret
= generic_file_splice_read(in
, ppos
, pipe
, len
, flags
);
2307 static ssize_t
ocfs2_file_aio_read(struct kiocb
*iocb
,
2308 const struct iovec
*iov
,
2309 unsigned long nr_segs
,
2312 int ret
= 0, rw_level
= -1, have_alloc_sem
= 0, lock_level
= 0;
2313 struct file
*filp
= iocb
->ki_filp
;
2314 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2316 mlog_entry("(0x%p, %u, '%.*s')\n", filp
,
2317 (unsigned int)nr_segs
,
2318 filp
->f_path
.dentry
->d_name
.len
,
2319 filp
->f_path
.dentry
->d_name
.name
);
2328 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2329 * need locks to protect pending reads from racing with truncate.
2331 if (filp
->f_flags
& O_DIRECT
) {
2332 down_read(&inode
->i_alloc_sem
);
2335 ret
= ocfs2_rw_lock(inode
, 0);
2341 /* communicate with ocfs2_dio_end_io */
2342 ocfs2_iocb_set_rw_locked(iocb
, rw_level
);
2346 * We're fine letting folks race truncates and extending
2347 * writes with read across the cluster, just like they can
2348 * locally. Hence no rw_lock during read.
2350 * Take and drop the meta data lock to update inode fields
2351 * like i_size. This allows the checks down below
2352 * generic_file_aio_read() a chance of actually working.
2354 ret
= ocfs2_inode_lock_atime(inode
, filp
->f_vfsmnt
, &lock_level
);
2359 ocfs2_inode_unlock(inode
, lock_level
);
2361 ret
= generic_file_aio_read(iocb
, iov
, nr_segs
, iocb
->ki_pos
);
2363 mlog(0, "generic_file_aio_read returned -EINVAL\n");
2365 /* buffered aio wouldn't have proper lock coverage today */
2366 BUG_ON(ret
== -EIOCBQUEUED
&& !(filp
->f_flags
& O_DIRECT
));
2368 /* see ocfs2_file_aio_write */
2369 if (ret
== -EIOCBQUEUED
|| !ocfs2_iocb_is_rw_locked(iocb
)) {
2376 up_read(&inode
->i_alloc_sem
);
2378 ocfs2_rw_unlock(inode
, rw_level
);
2384 const struct inode_operations ocfs2_file_iops
= {
2385 .setattr
= ocfs2_setattr
,
2386 .getattr
= ocfs2_getattr
,
2387 .permission
= ocfs2_permission
,
2388 .setxattr
= generic_setxattr
,
2389 .getxattr
= generic_getxattr
,
2390 .listxattr
= ocfs2_listxattr
,
2391 .removexattr
= generic_removexattr
,
2392 .fallocate
= ocfs2_fallocate
,
2393 .fiemap
= ocfs2_fiemap
,
2396 const struct inode_operations ocfs2_special_file_iops
= {
2397 .setattr
= ocfs2_setattr
,
2398 .getattr
= ocfs2_getattr
,
2399 .permission
= ocfs2_permission
,
2403 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2404 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2406 const struct file_operations ocfs2_fops
= {
2407 .llseek
= generic_file_llseek
,
2408 .read
= do_sync_read
,
2409 .write
= do_sync_write
,
2411 .fsync
= ocfs2_sync_file
,
2412 .release
= ocfs2_file_release
,
2413 .open
= ocfs2_file_open
,
2414 .aio_read
= ocfs2_file_aio_read
,
2415 .aio_write
= ocfs2_file_aio_write
,
2416 .unlocked_ioctl
= ocfs2_ioctl
,
2417 #ifdef CONFIG_COMPAT
2418 .compat_ioctl
= ocfs2_compat_ioctl
,
2421 .flock
= ocfs2_flock
,
2422 .splice_read
= ocfs2_file_splice_read
,
2423 .splice_write
= ocfs2_file_splice_write
,
2426 const struct file_operations ocfs2_dops
= {
2427 .llseek
= generic_file_llseek
,
2428 .read
= generic_read_dir
,
2429 .readdir
= ocfs2_readdir
,
2430 .fsync
= ocfs2_sync_file
,
2431 .release
= ocfs2_dir_release
,
2432 .open
= ocfs2_dir_open
,
2433 .unlocked_ioctl
= ocfs2_ioctl
,
2434 #ifdef CONFIG_COMPAT
2435 .compat_ioctl
= ocfs2_compat_ioctl
,
2438 .flock
= ocfs2_flock
,
2442 * POSIX-lockless variants of our file_operations.
2444 * These will be used if the underlying cluster stack does not support
2445 * posix file locking, if the user passes the "localflocks" mount
2446 * option, or if we have a local-only fs.
2448 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2449 * so we still want it in the case of no stack support for
2450 * plocks. Internally, it will do the right thing when asked to ignore
2453 const struct file_operations ocfs2_fops_no_plocks
= {
2454 .llseek
= generic_file_llseek
,
2455 .read
= do_sync_read
,
2456 .write
= do_sync_write
,
2458 .fsync
= ocfs2_sync_file
,
2459 .release
= ocfs2_file_release
,
2460 .open
= ocfs2_file_open
,
2461 .aio_read
= ocfs2_file_aio_read
,
2462 .aio_write
= ocfs2_file_aio_write
,
2463 .unlocked_ioctl
= ocfs2_ioctl
,
2464 #ifdef CONFIG_COMPAT
2465 .compat_ioctl
= ocfs2_compat_ioctl
,
2467 .flock
= ocfs2_flock
,
2468 .splice_read
= ocfs2_file_splice_read
,
2469 .splice_write
= ocfs2_file_splice_write
,
2472 const struct file_operations ocfs2_dops_no_plocks
= {
2473 .llseek
= generic_file_llseek
,
2474 .read
= generic_read_dir
,
2475 .readdir
= ocfs2_readdir
,
2476 .fsync
= ocfs2_sync_file
,
2477 .release
= ocfs2_dir_release
,
2478 .open
= ocfs2_dir_open
,
2479 .unlocked_ioctl
= ocfs2_ioctl
,
2480 #ifdef CONFIG_COMPAT
2481 .compat_ioctl
= ocfs2_compat_ioctl
,
2483 .flock
= ocfs2_flock
,