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 #define MLOG_MASK_PREFIX ML_INODE
42 #include <cluster/masklog.h>
50 #include "extent_map.h"
63 #include "refcounttree.h"
65 #include "buffer_head_io.h"
67 static int ocfs2_sync_inode(struct inode *inode)
69 filemap_fdatawrite(inode->i_mapping);
70 return sync_mapping_buffers(inode->i_mapping);
73 static int ocfs2_init_file_private(struct inode *inode, struct file *file)
75 struct ocfs2_file_private *fp;
77 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
82 mutex_init(&fp->fp_mutex);
83 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
84 file->private_data = fp;
89 static void ocfs2_free_file_private(struct inode *inode, struct file *file)
91 struct ocfs2_file_private *fp = file->private_data;
92 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
95 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
96 ocfs2_lock_res_free(&fp->fp_flock);
98 file->private_data = NULL;
102 static int ocfs2_file_open(struct inode *inode, struct file *file)
105 int mode = file->f_flags;
106 struct ocfs2_inode_info *oi = OCFS2_I(inode);
108 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
109 file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name);
111 if (file->f_mode & FMODE_WRITE)
112 dquot_initialize(inode);
114 spin_lock(&oi->ip_lock);
116 /* Check that the inode hasn't been wiped from disk by another
117 * node. If it hasn't then we're safe as long as we hold the
118 * spin lock until our increment of open count. */
119 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
120 spin_unlock(&oi->ip_lock);
127 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
130 spin_unlock(&oi->ip_lock);
132 status = ocfs2_init_file_private(inode, file);
135 * We want to set open count back if we're failing the
138 spin_lock(&oi->ip_lock);
140 spin_unlock(&oi->ip_lock);
148 static int ocfs2_file_release(struct inode *inode, struct file *file)
150 struct ocfs2_inode_info *oi = OCFS2_I(inode);
152 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
153 file->f_path.dentry->d_name.len,
154 file->f_path.dentry->d_name.name);
156 spin_lock(&oi->ip_lock);
157 if (!--oi->ip_open_count)
158 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
159 spin_unlock(&oi->ip_lock);
161 ocfs2_free_file_private(inode, file);
168 static int ocfs2_dir_open(struct inode *inode, struct file *file)
170 return ocfs2_init_file_private(inode, file);
173 static int ocfs2_dir_release(struct inode *inode, struct file *file)
175 ocfs2_free_file_private(inode, file);
179 static int ocfs2_sync_file(struct file *file, int datasync)
183 struct dentry *dentry = file->f_path.dentry;
184 struct inode *inode = file->f_mapping->host;
185 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
187 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync,
188 dentry->d_name.len, dentry->d_name.name);
190 err = ocfs2_sync_inode(dentry->d_inode);
194 if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) {
196 * We still have to flush drive's caches to get data to the
199 if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
200 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL,
201 NULL, BLKDEV_IFL_WAIT);
205 journal = osb->journal->j_journal;
206 err = jbd2_journal_force_commit(journal);
211 return (err < 0) ? -EIO : 0;
214 int ocfs2_should_update_atime(struct inode *inode,
215 struct vfsmount *vfsmnt)
218 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
220 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
223 if ((inode->i_flags & S_NOATIME) ||
224 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
228 * We can be called with no vfsmnt structure - NFSD will
231 * Note that our action here is different than touch_atime() -
232 * if we can't tell whether this is a noatime mount, then we
233 * don't know whether to trust the value of s_atime_quantum.
238 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
239 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
242 if (vfsmnt->mnt_flags & MNT_RELATIME) {
243 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
244 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
251 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
257 int ocfs2_update_inode_atime(struct inode *inode,
258 struct buffer_head *bh)
261 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
263 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
267 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
268 if (IS_ERR(handle)) {
269 ret = PTR_ERR(handle);
274 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
275 OCFS2_JOURNAL_ACCESS_WRITE);
282 * Don't use ocfs2_mark_inode_dirty() here as we don't always
283 * have i_mutex to guard against concurrent changes to other
286 inode->i_atime = CURRENT_TIME;
287 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
288 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
289 ocfs2_journal_dirty(handle, bh);
292 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
298 static int ocfs2_set_inode_size(handle_t *handle,
300 struct buffer_head *fe_bh,
306 i_size_write(inode, new_i_size);
307 inode->i_blocks = ocfs2_inode_sector_count(inode);
308 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
310 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;
392 * We need to CoW the cluster contains the offset if it is reflinked
393 * since we will call ocfs2_zero_range_for_truncate later which will
394 * write "0" from offset to the end of the cluster.
396 status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
402 /* TODO: This needs to actually orphan the inode in this
405 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
406 if (IS_ERR(handle)) {
407 status = PTR_ERR(handle);
412 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
413 OCFS2_JOURNAL_ACCESS_WRITE);
420 * Do this before setting i_size.
422 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
423 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
430 i_size_write(inode, new_i_size);
431 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
433 di = (struct ocfs2_dinode *) fe_bh->b_data;
434 di->i_size = cpu_to_le64(new_i_size);
435 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
436 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
438 ocfs2_journal_dirty(handle, fe_bh);
441 ocfs2_commit_trans(osb, handle);
448 static int ocfs2_truncate_file(struct inode *inode,
449 struct buffer_head *di_bh,
453 struct ocfs2_dinode *fe = NULL;
454 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
456 mlog_entry("(inode = %llu, new_i_size = %llu\n",
457 (unsigned long long)OCFS2_I(inode)->ip_blkno,
458 (unsigned long long)new_i_size);
460 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
461 * already validated it */
462 fe = (struct ocfs2_dinode *) di_bh->b_data;
464 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
465 "Inode %llu, inode i_size = %lld != di "
466 "i_size = %llu, i_flags = 0x%x\n",
467 (unsigned long long)OCFS2_I(inode)->ip_blkno,
469 (unsigned long long)le64_to_cpu(fe->i_size),
470 le32_to_cpu(fe->i_flags));
472 if (new_i_size > le64_to_cpu(fe->i_size)) {
473 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
474 (unsigned long long)le64_to_cpu(fe->i_size),
475 (unsigned long long)new_i_size);
481 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
482 (unsigned long long)le64_to_cpu(fe->i_blkno),
483 (unsigned long long)le64_to_cpu(fe->i_size),
484 (unsigned long long)new_i_size);
486 /* lets handle the simple truncate cases before doing any more
487 * cluster locking. */
488 if (new_i_size == le64_to_cpu(fe->i_size))
491 down_write(&OCFS2_I(inode)->ip_alloc_sem);
493 ocfs2_resv_discard(&osb->osb_la_resmap,
494 &OCFS2_I(inode)->ip_la_data_resv);
497 * The inode lock forced other nodes to sync and drop their
498 * pages, which (correctly) happens even if we have a truncate
499 * without allocation change - ocfs2 cluster sizes can be much
500 * greater than page size, so we have to truncate them
503 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
504 truncate_inode_pages(inode->i_mapping, new_i_size);
506 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
507 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
508 i_size_read(inode), 1);
512 goto bail_unlock_sem;
515 /* alright, we're going to need to do a full blown alloc size
516 * change. Orphan the inode so that recovery can complete the
517 * truncate if necessary. This does the task of marking
519 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
522 goto bail_unlock_sem;
525 status = ocfs2_commit_truncate(osb, inode, di_bh);
528 goto bail_unlock_sem;
531 /* TODO: orphan dir cleanup here. */
533 up_write(&OCFS2_I(inode)->ip_alloc_sem);
536 if (!status && OCFS2_I(inode)->ip_clusters == 0)
537 status = ocfs2_try_remove_refcount_tree(inode, di_bh);
544 * extend file allocation only here.
545 * we'll update all the disk stuff, and oip->alloc_size
547 * expect stuff to be locked, a transaction started and enough data /
548 * metadata reservations in the contexts.
550 * Will return -EAGAIN, and a reason if a restart is needed.
551 * If passed in, *reason will always be set, even in error.
553 int ocfs2_add_inode_data(struct ocfs2_super *osb,
558 struct buffer_head *fe_bh,
560 struct ocfs2_alloc_context *data_ac,
561 struct ocfs2_alloc_context *meta_ac,
562 enum ocfs2_alloc_restarted *reason_ret)
565 struct ocfs2_extent_tree et;
567 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh);
568 ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
569 clusters_to_add, mark_unwritten,
570 data_ac, meta_ac, reason_ret);
575 static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
576 u32 clusters_to_add, int mark_unwritten)
579 int restart_func = 0;
582 struct buffer_head *bh = NULL;
583 struct ocfs2_dinode *fe = NULL;
584 handle_t *handle = NULL;
585 struct ocfs2_alloc_context *data_ac = NULL;
586 struct ocfs2_alloc_context *meta_ac = NULL;
587 enum ocfs2_alloc_restarted why;
588 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
589 struct ocfs2_extent_tree et;
592 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
595 * This function only exists for file systems which don't
598 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
600 status = ocfs2_read_inode_block(inode, &bh);
605 fe = (struct ocfs2_dinode *) bh->b_data;
608 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
610 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
611 "clusters_to_add = %u\n",
612 (unsigned long long)OCFS2_I(inode)->ip_blkno,
613 (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
615 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh);
616 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
623 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
625 handle = ocfs2_start_trans(osb, credits);
626 if (IS_ERR(handle)) {
627 status = PTR_ERR(handle);
633 restarted_transaction:
634 status = dquot_alloc_space_nodirty(inode,
635 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
640 /* reserve a write to the file entry early on - that we if we
641 * run out of credits in the allocation path, we can still
643 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
644 OCFS2_JOURNAL_ACCESS_WRITE);
650 prev_clusters = OCFS2_I(inode)->ip_clusters;
652 status = ocfs2_add_inode_data(osb,
662 if ((status < 0) && (status != -EAGAIN)) {
663 if (status != -ENOSPC)
668 ocfs2_journal_dirty(handle, bh);
670 spin_lock(&OCFS2_I(inode)->ip_lock);
671 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
672 spin_unlock(&OCFS2_I(inode)->ip_lock);
673 /* Release unused quota reservation */
674 dquot_free_space(inode,
675 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
678 if (why != RESTART_NONE && clusters_to_add) {
679 if (why == RESTART_META) {
680 mlog(0, "restarting function.\n");
684 BUG_ON(why != RESTART_TRANS);
686 mlog(0, "restarting transaction.\n");
687 /* TODO: This can be more intelligent. */
688 credits = ocfs2_calc_extend_credits(osb->sb,
691 status = ocfs2_extend_trans(handle, credits);
693 /* handle still has to be committed at
699 goto restarted_transaction;
703 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
704 le32_to_cpu(fe->i_clusters),
705 (unsigned long long)le64_to_cpu(fe->i_size));
706 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
707 OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode));
710 if (status < 0 && did_quota)
711 dquot_free_space(inode,
712 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
714 ocfs2_commit_trans(osb, handle);
718 ocfs2_free_alloc_context(data_ac);
722 ocfs2_free_alloc_context(meta_ac);
725 if ((!status) && restart_func) {
737 * While a write will already be ordering the data, a truncate will not.
738 * Thus, we need to explicitly order the zeroed pages.
740 static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode)
742 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
743 handle_t *handle = NULL;
746 if (!ocfs2_should_order_data(inode))
749 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
750 if (IS_ERR(handle)) {
756 ret = ocfs2_jbd2_file_inode(handle, inode);
763 ocfs2_commit_trans(osb, handle);
764 handle = ERR_PTR(ret);
769 /* Some parts of this taken from generic_cont_expand, which turned out
770 * to be too fragile to do exactly what we need without us having to
771 * worry about recursive locking in ->write_begin() and ->write_end(). */
772 static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from,
775 struct address_space *mapping = inode->i_mapping;
777 unsigned long index = abs_from >> PAGE_CACHE_SHIFT;
778 handle_t *handle = NULL;
780 unsigned zero_from, zero_to, block_start, block_end;
782 BUG_ON(abs_from >= abs_to);
783 BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT));
784 BUG_ON(abs_from & (inode->i_blkbits - 1));
786 page = find_or_create_page(mapping, index, GFP_NOFS);
793 /* Get the offsets within the page that we want to zero */
794 zero_from = abs_from & (PAGE_CACHE_SIZE - 1);
795 zero_to = abs_to & (PAGE_CACHE_SIZE - 1);
797 zero_to = PAGE_CACHE_SIZE;
800 "abs_from = %llu, abs_to = %llu, index = %lu, zero_from = %u, zero_to = %u\n",
801 (unsigned long long)abs_from, (unsigned long long)abs_to,
802 index, zero_from, zero_to);
804 /* We know that zero_from is block aligned */
805 for (block_start = zero_from; block_start < zero_to;
806 block_start = block_end) {
807 block_end = block_start + (1 << inode->i_blkbits);
810 * block_start is block-aligned. Bump it by one to
811 * force ocfs2_{prepare,commit}_write() to zero the
814 ret = ocfs2_prepare_write_nolock(inode, page,
823 handle = ocfs2_zero_start_ordered_transaction(inode);
824 if (IS_ERR(handle)) {
825 ret = PTR_ERR(handle);
831 /* must not update i_size! */
832 ret = block_commit_write(page, block_start + 1,
841 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
845 page_cache_release(page);
851 * Find the next range to zero. We do this in terms of bytes because
852 * that's what ocfs2_zero_extend() wants, and it is dealing with the
853 * pagecache. We may return multiple extents.
855 * zero_start and zero_end are ocfs2_zero_extend()s current idea of what
856 * needs to be zeroed. range_start and range_end return the next zeroing
857 * range. A subsequent call should pass the previous range_end as its
858 * zero_start. If range_end is 0, there's nothing to do.
860 * Unwritten extents are skipped over. Refcounted extents are CoWd.
862 static int ocfs2_zero_extend_get_range(struct inode *inode,
863 struct buffer_head *di_bh,
864 u64 zero_start, u64 zero_end,
865 u64 *range_start, u64 *range_end)
867 int rc = 0, needs_cow = 0;
868 u32 p_cpos, zero_clusters = 0;
870 zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
871 u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end);
872 unsigned int num_clusters = 0;
873 unsigned int ext_flags = 0;
875 while (zero_cpos < last_cpos) {
876 rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos,
877 &num_clusters, &ext_flags);
883 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
884 zero_clusters = num_clusters;
885 if (ext_flags & OCFS2_EXT_REFCOUNTED)
890 zero_cpos += num_clusters;
892 if (!zero_clusters) {
897 while ((zero_cpos + zero_clusters) < last_cpos) {
898 rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters,
899 &p_cpos, &num_clusters,
906 if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN))
908 if (ext_flags & OCFS2_EXT_REFCOUNTED)
910 zero_clusters += num_clusters;
912 if ((zero_cpos + zero_clusters) > last_cpos)
913 zero_clusters = last_cpos - zero_cpos;
916 rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos, zero_clusters,
924 *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos);
925 *range_end = ocfs2_clusters_to_bytes(inode->i_sb,
926 zero_cpos + zero_clusters);
933 * Zero one range returned from ocfs2_zero_extend_get_range(). The caller
934 * has made sure that the entire range needs zeroing.
936 static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start,
941 u64 zero_pos = range_start;
943 mlog(0, "range_start = %llu, range_end = %llu\n",
944 (unsigned long long)range_start,
945 (unsigned long long)range_end);
946 BUG_ON(range_start >= range_end);
948 while (zero_pos < range_end) {
949 next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE;
950 if (next_pos > range_end)
951 next_pos = range_end;
952 rc = ocfs2_write_zero_page(inode, zero_pos, next_pos);
960 * Very large extends have the potential to lock up
961 * the cpu for extended periods of time.
969 int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
973 u64 zero_start, range_start = 0, range_end = 0;
974 struct super_block *sb = inode->i_sb;
976 zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
977 mlog(0, "zero_start %llu for i_size %llu\n",
978 (unsigned long long)zero_start,
979 (unsigned long long)i_size_read(inode));
980 while (zero_start < zero_to_size) {
981 ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start,
992 if (range_start < zero_start)
993 range_start = zero_start;
994 if (range_end > zero_to_size)
995 range_end = zero_to_size;
997 ret = ocfs2_zero_extend_range(inode, range_start,
1003 zero_start = range_end;
1009 int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
1010 u64 new_i_size, u64 zero_to)
1013 u32 clusters_to_add;
1014 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1017 * Only quota files call this without a bh, and they can't be
1020 BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
1021 BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));
1023 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
1024 if (clusters_to_add < oi->ip_clusters)
1025 clusters_to_add = 0;
1027 clusters_to_add -= oi->ip_clusters;
1029 if (clusters_to_add) {
1030 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
1031 clusters_to_add, 0);
1039 * Call this even if we don't add any clusters to the tree. We
1040 * still need to zero the area between the old i_size and the
1043 ret = ocfs2_zero_extend(inode, di_bh, zero_to);
1051 static int ocfs2_extend_file(struct inode *inode,
1052 struct buffer_head *di_bh,
1056 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1060 /* setattr sometimes calls us like this. */
1061 if (new_i_size == 0)
1064 if (i_size_read(inode) == new_i_size)
1066 BUG_ON(new_i_size < i_size_read(inode));
1069 * The alloc sem blocks people in read/write from reading our
1070 * allocation until we're done changing it. We depend on
1071 * i_mutex to block other extend/truncate calls while we're
1072 * here. We even have to hold it for sparse files because there
1073 * might be some tail zeroing.
1075 down_write(&oi->ip_alloc_sem);
1077 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1079 * We can optimize small extends by keeping the inodes
1082 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
1083 up_write(&oi->ip_alloc_sem);
1084 goto out_update_size;
1087 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1089 up_write(&oi->ip_alloc_sem);
1095 if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
1096 ret = ocfs2_zero_extend(inode, di_bh, new_i_size);
1098 ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size,
1101 up_write(&oi->ip_alloc_sem);
1109 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
1117 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
1119 int status = 0, size_change;
1120 struct inode *inode = dentry->d_inode;
1121 struct super_block *sb = inode->i_sb;
1122 struct ocfs2_super *osb = OCFS2_SB(sb);
1123 struct buffer_head *bh = NULL;
1124 handle_t *handle = NULL;
1125 struct dquot *transfer_to[MAXQUOTAS] = { };
1128 mlog_entry("(0x%p, '%.*s')\n", dentry,
1129 dentry->d_name.len, dentry->d_name.name);
1131 /* ensuring we don't even attempt to truncate a symlink */
1132 if (S_ISLNK(inode->i_mode))
1133 attr->ia_valid &= ~ATTR_SIZE;
1135 if (attr->ia_valid & ATTR_MODE)
1136 mlog(0, "mode change: %d\n", attr->ia_mode);
1137 if (attr->ia_valid & ATTR_UID)
1138 mlog(0, "uid change: %d\n", attr->ia_uid);
1139 if (attr->ia_valid & ATTR_GID)
1140 mlog(0, "gid change: %d\n", attr->ia_gid);
1141 if (attr->ia_valid & ATTR_SIZE)
1142 mlog(0, "size change...\n");
1143 if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
1144 mlog(0, "time change...\n");
1146 #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
1147 | ATTR_GID | ATTR_UID | ATTR_MODE)
1148 if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
1149 mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
1153 status = inode_change_ok(inode, attr);
1157 if (is_quota_modification(inode, attr))
1158 dquot_initialize(inode);
1159 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
1161 status = ocfs2_rw_lock(inode, 1);
1168 status = ocfs2_inode_lock(inode, &bh, 1);
1170 if (status != -ENOENT)
1172 goto bail_unlock_rw;
1175 if (size_change && attr->ia_size != i_size_read(inode)) {
1176 status = inode_newsize_ok(inode, attr->ia_size);
1180 if (i_size_read(inode) > attr->ia_size) {
1181 if (ocfs2_should_order_data(inode)) {
1182 status = ocfs2_begin_ordered_truncate(inode,
1187 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
1189 status = ocfs2_extend_file(inode, bh, attr->ia_size);
1191 if (status != -ENOSPC)
1198 if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
1199 (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
1201 * Gather pointers to quota structures so that allocation /
1202 * freeing of quota structures happens here and not inside
1203 * dquot_transfer() where we have problems with lock ordering
1205 if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
1206 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1207 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1208 transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid,
1210 if (!transfer_to[USRQUOTA]) {
1215 if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid
1216 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1217 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1218 transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid,
1220 if (!transfer_to[GRPQUOTA]) {
1225 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
1226 2 * ocfs2_quota_trans_credits(sb));
1227 if (IS_ERR(handle)) {
1228 status = PTR_ERR(handle);
1232 status = __dquot_transfer(inode, transfer_to);
1236 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1237 if (IS_ERR(handle)) {
1238 status = PTR_ERR(handle);
1245 * This will intentionally not wind up calling truncate_setsize(),
1246 * since all the work for a size change has been done above.
1247 * Otherwise, we could get into problems with truncate as
1248 * ip_alloc_sem is used there to protect against i_size
1251 * XXX: this means the conditional below can probably be removed.
1253 if ((attr->ia_valid & ATTR_SIZE) &&
1254 attr->ia_size != i_size_read(inode)) {
1255 status = vmtruncate(inode, attr->ia_size);
1262 setattr_copy(inode, attr);
1263 mark_inode_dirty(inode);
1265 status = ocfs2_mark_inode_dirty(handle, inode, bh);
1270 ocfs2_commit_trans(osb, handle);
1272 ocfs2_inode_unlock(inode, 1);
1275 ocfs2_rw_unlock(inode, 1);
1279 /* Release quota pointers in case we acquired them */
1280 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1281 dqput(transfer_to[qtype]);
1283 if (!status && attr->ia_valid & ATTR_MODE) {
1284 status = ocfs2_acl_chmod(inode);
1293 int ocfs2_getattr(struct vfsmount *mnt,
1294 struct dentry *dentry,
1297 struct inode *inode = dentry->d_inode;
1298 struct super_block *sb = dentry->d_inode->i_sb;
1299 struct ocfs2_super *osb = sb->s_fs_info;
1304 err = ocfs2_inode_revalidate(dentry);
1311 generic_fillattr(inode, stat);
1313 /* We set the blksize from the cluster size for performance */
1314 stat->blksize = osb->s_clustersize;
1322 int ocfs2_permission(struct inode *inode, int mask)
1328 ret = ocfs2_inode_lock(inode, NULL, 0);
1335 ret = generic_permission(inode, mask, ocfs2_check_acl);
1337 ocfs2_inode_unlock(inode, 0);
1343 static int __ocfs2_write_remove_suid(struct inode *inode,
1344 struct buffer_head *bh)
1348 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1349 struct ocfs2_dinode *di;
1351 mlog_entry("(Inode %llu, mode 0%o)\n",
1352 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
1354 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1355 if (IS_ERR(handle)) {
1356 ret = PTR_ERR(handle);
1361 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1362 OCFS2_JOURNAL_ACCESS_WRITE);
1368 inode->i_mode &= ~S_ISUID;
1369 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1370 inode->i_mode &= ~S_ISGID;
1372 di = (struct ocfs2_dinode *) bh->b_data;
1373 di->i_mode = cpu_to_le16(inode->i_mode);
1375 ocfs2_journal_dirty(handle, bh);
1378 ocfs2_commit_trans(osb, handle);
1385 * Will look for holes and unwritten extents in the range starting at
1386 * pos for count bytes (inclusive).
1388 static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
1392 unsigned int extent_flags;
1393 u32 cpos, clusters, extent_len, phys_cpos;
1394 struct super_block *sb = inode->i_sb;
1396 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
1397 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
1400 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
1407 if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
1412 if (extent_len > clusters)
1413 extent_len = clusters;
1415 clusters -= extent_len;
1422 static int ocfs2_write_remove_suid(struct inode *inode)
1425 struct buffer_head *bh = NULL;
1427 ret = ocfs2_read_inode_block(inode, &bh);
1433 ret = __ocfs2_write_remove_suid(inode, bh);
1440 * Allocate enough extents to cover the region starting at byte offset
1441 * start for len bytes. Existing extents are skipped, any extents
1442 * added are marked as "unwritten".
1444 static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1448 u32 cpos, phys_cpos, clusters, alloc_size;
1449 u64 end = start + len;
1450 struct buffer_head *di_bh = NULL;
1452 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1453 ret = ocfs2_read_inode_block(inode, &di_bh);
1460 * Nothing to do if the requested reservation range
1461 * fits within the inode.
1463 if (ocfs2_size_fits_inline_data(di_bh, end))
1466 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1474 * We consider both start and len to be inclusive.
1476 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1477 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1481 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1489 * Hole or existing extent len can be arbitrary, so
1490 * cap it to our own allocation request.
1492 if (alloc_size > clusters)
1493 alloc_size = clusters;
1497 * We already have an allocation at this
1498 * region so we can safely skip it.
1503 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1512 clusters -= alloc_size;
1523 * Truncate a byte range, avoiding pages within partial clusters. This
1524 * preserves those pages for the zeroing code to write to.
1526 static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1529 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1531 struct address_space *mapping = inode->i_mapping;
1533 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1534 end = byte_start + byte_len;
1535 end = end & ~(osb->s_clustersize - 1);
1538 unmap_mapping_range(mapping, start, end - start, 0);
1539 truncate_inode_pages_range(mapping, start, end - 1);
1543 static int ocfs2_zero_partial_clusters(struct inode *inode,
1547 u64 tmpend, end = start + len;
1548 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1549 unsigned int csize = osb->s_clustersize;
1553 * The "start" and "end" values are NOT necessarily part of
1554 * the range whose allocation is being deleted. Rather, this
1555 * is what the user passed in with the request. We must zero
1556 * partial clusters here. There's no need to worry about
1557 * physical allocation - the zeroing code knows to skip holes.
1559 mlog(0, "byte start: %llu, end: %llu\n",
1560 (unsigned long long)start, (unsigned long long)end);
1563 * If both edges are on a cluster boundary then there's no
1564 * zeroing required as the region is part of the allocation to
1567 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1570 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1571 if (IS_ERR(handle)) {
1572 ret = PTR_ERR(handle);
1578 * We want to get the byte offset of the end of the 1st cluster.
1580 tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
1584 mlog(0, "1st range: start: %llu, tmpend: %llu\n",
1585 (unsigned long long)start, (unsigned long long)tmpend);
1587 ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
1593 * This may make start and end equal, but the zeroing
1594 * code will skip any work in that case so there's no
1595 * need to catch it up here.
1597 start = end & ~(osb->s_clustersize - 1);
1599 mlog(0, "2nd range: start: %llu, end: %llu\n",
1600 (unsigned long long)start, (unsigned long long)end);
1602 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1607 ocfs2_commit_trans(osb, handle);
1612 static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos)
1615 struct ocfs2_extent_rec *rec = NULL;
1617 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
1619 rec = &el->l_recs[i];
1621 if (le32_to_cpu(rec->e_cpos) < pos)
1629 * Helper to calculate the punching pos and length in one run, we handle the
1630 * following three cases in order:
1632 * - remove the entire record
1633 * - remove a partial record
1634 * - no record needs to be removed (hole-punching completed)
1636 static void ocfs2_calc_trunc_pos(struct inode *inode,
1637 struct ocfs2_extent_list *el,
1638 struct ocfs2_extent_rec *rec,
1639 u32 trunc_start, u32 *trunc_cpos,
1640 u32 *trunc_len, u32 *trunc_end,
1641 u64 *blkno, int *done)
1646 range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
1648 if (le32_to_cpu(rec->e_cpos) >= trunc_start) {
1649 *trunc_cpos = le32_to_cpu(rec->e_cpos);
1651 * Skip holes if any.
1653 if (range < *trunc_end)
1655 *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos);
1656 *blkno = le64_to_cpu(rec->e_blkno);
1657 *trunc_end = le32_to_cpu(rec->e_cpos);
1658 } else if (range > trunc_start) {
1659 *trunc_cpos = trunc_start;
1660 *trunc_len = *trunc_end - trunc_start;
1661 coff = trunc_start - le32_to_cpu(rec->e_cpos);
1662 *blkno = le64_to_cpu(rec->e_blkno) +
1663 ocfs2_clusters_to_blocks(inode->i_sb, coff);
1664 *trunc_end = trunc_start;
1667 * It may have two following possibilities:
1669 * - last record has been removed
1670 * - trunc_start was within a hole
1672 * both two cases mean the completion of hole punching.
1680 static int ocfs2_remove_inode_range(struct inode *inode,
1681 struct buffer_head *di_bh, u64 byte_start,
1684 int ret = 0, flags = 0, done = 0, i;
1685 u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos;
1687 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1688 struct ocfs2_cached_dealloc_ctxt dealloc;
1689 struct address_space *mapping = inode->i_mapping;
1690 struct ocfs2_extent_tree et;
1691 struct ocfs2_path *path = NULL;
1692 struct ocfs2_extent_list *el = NULL;
1693 struct ocfs2_extent_rec *rec = NULL;
1694 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1695 u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc);
1697 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
1698 ocfs2_init_dealloc_ctxt(&dealloc);
1703 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1704 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
1705 byte_start + byte_len, 0);
1711 * There's no need to get fancy with the page cache
1712 * truncate of an inline-data inode. We're talking
1713 * about less than a page here, which will be cached
1714 * in the dinode buffer anyway.
1716 unmap_mapping_range(mapping, 0, 0, 0);
1717 truncate_inode_pages(mapping, 0);
1722 * For reflinks, we may need to CoW 2 clusters which might be
1723 * partially zero'd later, if hole's start and end offset were
1724 * within one cluster(means is not exactly aligned to clustersize).
1727 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) {
1729 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
1735 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
1742 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
1743 trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits;
1744 cluster_in_el = trunc_end;
1746 mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, cend: %u\n",
1747 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1748 (unsigned long long)byte_start,
1749 (unsigned long long)byte_len, trunc_start, trunc_end);
1751 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1757 path = ocfs2_new_path_from_et(&et);
1764 while (trunc_end > trunc_start) {
1766 ret = ocfs2_find_path(INODE_CACHE(inode), path,
1773 el = path_leaf_el(path);
1775 i = ocfs2_find_rec(el, trunc_end);
1777 * Need to go to previous extent block.
1780 if (path->p_tree_depth == 0)
1783 ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb,
1792 * We've reached the leftmost extent block,
1793 * it's safe to leave.
1795 if (cluster_in_el == 0)
1799 * The 'pos' searched for previous extent block is
1800 * always one cluster less than actual trunc_end.
1802 trunc_end = cluster_in_el + 1;
1804 ocfs2_reinit_path(path, 1);
1809 rec = &el->l_recs[i];
1811 ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos,
1812 &trunc_len, &trunc_end, &blkno, &done);
1816 flags = rec->e_flags;
1817 phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
1819 ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
1820 phys_cpos, trunc_len, flags,
1821 &dealloc, refcount_loc);
1827 cluster_in_el = trunc_end;
1829 ocfs2_reinit_path(path, 1);
1832 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1835 ocfs2_schedule_truncate_log_flush(osb, 1);
1836 ocfs2_run_deallocs(osb, &dealloc);
1842 * Parts of this function taken from xfs_change_file_space()
1844 static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1845 loff_t f_pos, unsigned int cmd,
1846 struct ocfs2_space_resv *sr,
1852 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1853 struct buffer_head *di_bh = NULL;
1855 unsigned long long max_off = inode->i_sb->s_maxbytes;
1857 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1860 mutex_lock(&inode->i_mutex);
1863 * This prevents concurrent writes on other nodes
1865 ret = ocfs2_rw_lock(inode, 1);
1871 ret = ocfs2_inode_lock(inode, &di_bh, 1);
1877 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1879 goto out_inode_unlock;
1882 switch (sr->l_whence) {
1883 case 0: /*SEEK_SET*/
1885 case 1: /*SEEK_CUR*/
1886 sr->l_start += f_pos;
1888 case 2: /*SEEK_END*/
1889 sr->l_start += i_size_read(inode);
1893 goto out_inode_unlock;
1897 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1900 || sr->l_start > max_off
1901 || (sr->l_start + llen) < 0
1902 || (sr->l_start + llen) > max_off) {
1904 goto out_inode_unlock;
1906 size = sr->l_start + sr->l_len;
1908 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1909 if (sr->l_len <= 0) {
1911 goto out_inode_unlock;
1915 if (file && should_remove_suid(file->f_path.dentry)) {
1916 ret = __ocfs2_write_remove_suid(inode, di_bh);
1919 goto out_inode_unlock;
1923 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1925 case OCFS2_IOC_RESVSP:
1926 case OCFS2_IOC_RESVSP64:
1928 * This takes unsigned offsets, but the signed ones we
1929 * pass have been checked against overflow above.
1931 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1934 case OCFS2_IOC_UNRESVSP:
1935 case OCFS2_IOC_UNRESVSP64:
1936 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1942 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1945 goto out_inode_unlock;
1949 * We update c/mtime for these changes
1951 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1952 if (IS_ERR(handle)) {
1953 ret = PTR_ERR(handle);
1955 goto out_inode_unlock;
1958 if (change_size && i_size_read(inode) < size)
1959 i_size_write(inode, size);
1961 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1962 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1966 ocfs2_commit_trans(osb, handle);
1970 ocfs2_inode_unlock(inode, 1);
1972 ocfs2_rw_unlock(inode, 1);
1975 mutex_unlock(&inode->i_mutex);
1979 int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1980 struct ocfs2_space_resv *sr)
1982 struct inode *inode = file->f_path.dentry->d_inode;
1983 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1985 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1986 !ocfs2_writes_unwritten_extents(osb))
1988 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1989 !ocfs2_sparse_alloc(osb))
1992 if (!S_ISREG(inode->i_mode))
1995 if (!(file->f_mode & FMODE_WRITE))
1998 return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
2001 static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
2004 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2005 struct ocfs2_space_resv sr;
2006 int change_size = 1;
2008 if (!ocfs2_writes_unwritten_extents(osb))
2011 if (S_ISDIR(inode->i_mode))
2014 if (mode & FALLOC_FL_KEEP_SIZE)
2018 sr.l_start = (s64)offset;
2019 sr.l_len = (s64)len;
2021 return __ocfs2_change_file_space(NULL, inode, offset,
2022 OCFS2_IOC_RESVSP64, &sr, change_size);
2025 int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
2029 unsigned int extent_flags;
2030 u32 cpos, clusters, extent_len, phys_cpos;
2031 struct super_block *sb = inode->i_sb;
2033 if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
2034 !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) ||
2035 OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
2038 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
2039 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
2042 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
2049 if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
2054 if (extent_len > clusters)
2055 extent_len = clusters;
2057 clusters -= extent_len;
2064 static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
2065 loff_t pos, size_t count,
2069 struct buffer_head *di_bh = NULL;
2070 u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
2072 ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;
2074 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2082 ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX);
2090 static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
2097 int ret = 0, meta_level = 0;
2098 struct inode *inode = dentry->d_inode;
2099 loff_t saved_pos, end;
2102 * We start with a read level meta lock and only jump to an ex
2103 * if we need to make modifications here.
2106 ret = ocfs2_inode_lock(inode, NULL, meta_level);
2113 /* Clear suid / sgid if necessary. We do this here
2114 * instead of later in the write path because
2115 * remove_suid() calls ->setattr without any hint that
2116 * we may have already done our cluster locking. Since
2117 * ocfs2_setattr() *must* take cluster locks to
2118 * proceeed, this will lead us to recursively lock the
2119 * inode. There's also the dinode i_size state which
2120 * can be lost via setattr during extending writes (we
2121 * set inode->i_size at the end of a write. */
2122 if (should_remove_suid(dentry)) {
2123 if (meta_level == 0) {
2124 ocfs2_inode_unlock(inode, meta_level);
2129 ret = ocfs2_write_remove_suid(inode);
2136 /* work on a copy of ppos until we're sure that we won't have
2137 * to recalculate it due to relocking. */
2139 saved_pos = i_size_read(inode);
2140 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
2145 end = saved_pos + count;
2147 ret = ocfs2_check_range_for_refcount(inode, saved_pos, count);
2149 ocfs2_inode_unlock(inode, meta_level);
2152 ret = ocfs2_prepare_inode_for_refcount(inode,
2168 * Skip the O_DIRECT checks if we don't need
2171 if (!direct_io || !(*direct_io))
2175 * There's no sane way to do direct writes to an inode
2178 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2184 * Allowing concurrent direct writes means
2185 * i_size changes wouldn't be synchronized, so
2186 * one node could wind up truncating another
2189 if (end > i_size_read(inode)) {
2195 * We don't fill holes during direct io, so
2196 * check for them here. If any are found, the
2197 * caller will have to retake some cluster
2198 * locks and initiate the io as buffered.
2200 ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
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->f_path.dentry->d_inode;
2234 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2236 mlog_entry("(0x%p, %u, '%.*s')\n", file,
2237 (unsigned int)nr_segs,
2238 file->f_path.dentry->d_name.len,
2239 file->f_path.dentry->d_name.name);
2241 if (iocb->ki_left == 0)
2244 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
2246 appending = file->f_flags & O_APPEND ? 1 : 0;
2247 direct_io = file->f_flags & O_DIRECT ? 1 : 0;
2249 mutex_lock(&inode->i_mutex);
2252 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
2254 down_read(&inode->i_alloc_sem);
2258 /* concurrent O_DIRECT writes are allowed */
2259 rw_level = !direct_io;
2260 ret = ocfs2_rw_lock(inode, rw_level);
2266 can_do_direct = direct_io;
2267 ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos,
2268 iocb->ki_left, appending,
2269 &can_do_direct, &has_refcount);
2276 * We can't complete the direct I/O as requested, fall back to
2279 if (direct_io && !can_do_direct) {
2280 ocfs2_rw_unlock(inode, rw_level);
2281 up_read(&inode->i_alloc_sem);
2291 * To later detect whether a journal commit for sync writes is
2292 * necessary, we sample i_size, and cluster count here.
2294 old_size = i_size_read(inode);
2295 old_clusters = OCFS2_I(inode)->ip_clusters;
2297 /* communicate with ocfs2_dio_end_io */
2298 ocfs2_iocb_set_rw_locked(iocb, rw_level);
2300 ret = generic_segment_checks(iov, &nr_segs, &ocount,
2306 ret = generic_write_checks(file, ppos, &count,
2307 S_ISBLK(inode->i_mode));
2312 written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
2313 ppos, count, ocount);
2316 * direct write may have instantiated a few
2317 * blocks outside i_size. Trim these off again.
2318 * Don't need i_size_read because we hold i_mutex.
2320 * XXX(truncate): this looks buggy because ocfs2 did not
2321 * actually implement ->truncate. Take a look at
2322 * the new truncate sequence and update this accordingly
2324 if (*ppos + count > inode->i_size)
2325 truncate_setsize(inode, inode->i_size);
2330 current->backing_dev_info = file->f_mapping->backing_dev_info;
2331 written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos,
2333 current->backing_dev_info = NULL;
2337 /* buffered aio wouldn't have proper lock coverage today */
2338 BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
2340 if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) ||
2341 ((file->f_flags & O_DIRECT) && !direct_io)) {
2342 ret = filemap_fdatawrite_range(file->f_mapping, pos,
2347 if (!ret && ((old_size != i_size_read(inode)) ||
2348 (old_clusters != OCFS2_I(inode)->ip_clusters) ||
2350 ret = jbd2_journal_force_commit(osb->journal->j_journal);
2356 ret = filemap_fdatawait_range(file->f_mapping, pos,
2361 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
2362 * function pointer which is called when o_direct io completes so that
2363 * it can unlock our rw lock. (it's the clustered equivalent of
2364 * i_alloc_sem; protects truncate from racing with pending ios).
2365 * Unfortunately there are error cases which call end_io and others
2366 * that don't. so we don't have to unlock the rw_lock if either an
2367 * async dio is going to do it in the future or an end_io after an
2368 * error has already done it.
2370 if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
2377 ocfs2_rw_unlock(inode, rw_level);
2381 up_read(&inode->i_alloc_sem);
2383 mutex_unlock(&inode->i_mutex);
2391 static int ocfs2_splice_to_file(struct pipe_inode_info *pipe,
2393 struct splice_desc *sd)
2397 ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, &sd->pos,
2398 sd->total_len, 0, NULL, NULL);
2404 return splice_from_pipe_feed(pipe, sd, pipe_to_file);
2407 static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
2414 struct address_space *mapping = out->f_mapping;
2415 struct inode *inode = mapping->host;
2416 struct splice_desc sd = {
2423 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe,
2425 out->f_path.dentry->d_name.len,
2426 out->f_path.dentry->d_name.name);
2429 mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT);
2431 splice_from_pipe_begin(&sd);
2433 ret = splice_from_pipe_next(pipe, &sd);
2437 mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);
2438 ret = ocfs2_rw_lock(inode, 1);
2442 ret = ocfs2_splice_to_file(pipe, out, &sd);
2443 ocfs2_rw_unlock(inode, 1);
2445 mutex_unlock(&inode->i_mutex);
2447 splice_from_pipe_end(pipe, &sd);
2450 mutex_unlock(&pipe->inode->i_mutex);
2453 ret = sd.num_spliced;
2456 unsigned long nr_pages;
2459 nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
2461 err = generic_write_sync(out, *ppos, ret);
2467 balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
2474 static ssize_t ocfs2_file_splice_read(struct file *in,
2476 struct pipe_inode_info *pipe,
2480 int ret = 0, lock_level = 0;
2481 struct inode *inode = in->f_path.dentry->d_inode;
2483 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe,
2485 in->f_path.dentry->d_name.len,
2486 in->f_path.dentry->d_name.name);
2489 * See the comment in ocfs2_file_aio_read()
2491 ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level);
2496 ocfs2_inode_unlock(inode, lock_level);
2498 ret = generic_file_splice_read(in, ppos, pipe, len, flags);
2505 static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
2506 const struct iovec *iov,
2507 unsigned long nr_segs,
2510 int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
2511 struct file *filp = iocb->ki_filp;
2512 struct inode *inode = filp->f_path.dentry->d_inode;
2514 mlog_entry("(0x%p, %u, '%.*s')\n", filp,
2515 (unsigned int)nr_segs,
2516 filp->f_path.dentry->d_name.len,
2517 filp->f_path.dentry->d_name.name);
2526 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2527 * need locks to protect pending reads from racing with truncate.
2529 if (filp->f_flags & O_DIRECT) {
2530 down_read(&inode->i_alloc_sem);
2533 ret = ocfs2_rw_lock(inode, 0);
2539 /* communicate with ocfs2_dio_end_io */
2540 ocfs2_iocb_set_rw_locked(iocb, rw_level);
2544 * We're fine letting folks race truncates and extending
2545 * writes with read across the cluster, just like they can
2546 * locally. Hence no rw_lock during read.
2548 * Take and drop the meta data lock to update inode fields
2549 * like i_size. This allows the checks down below
2550 * generic_file_aio_read() a chance of actually working.
2552 ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
2557 ocfs2_inode_unlock(inode, lock_level);
2559 ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
2561 mlog(0, "generic_file_aio_read returned -EINVAL\n");
2563 /* buffered aio wouldn't have proper lock coverage today */
2564 BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
2566 /* see ocfs2_file_aio_write */
2567 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2574 up_read(&inode->i_alloc_sem);
2576 ocfs2_rw_unlock(inode, rw_level);
2582 const struct inode_operations ocfs2_file_iops = {
2583 .setattr = ocfs2_setattr,
2584 .getattr = ocfs2_getattr,
2585 .permission = ocfs2_permission,
2586 .setxattr = generic_setxattr,
2587 .getxattr = generic_getxattr,
2588 .listxattr = ocfs2_listxattr,
2589 .removexattr = generic_removexattr,
2590 .fallocate = ocfs2_fallocate,
2591 .fiemap = ocfs2_fiemap,
2594 const struct inode_operations ocfs2_special_file_iops = {
2595 .setattr = ocfs2_setattr,
2596 .getattr = ocfs2_getattr,
2597 .permission = ocfs2_permission,
2601 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2602 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2604 const struct file_operations ocfs2_fops = {
2605 .llseek = generic_file_llseek,
2606 .read = do_sync_read,
2607 .write = do_sync_write,
2609 .fsync = ocfs2_sync_file,
2610 .release = ocfs2_file_release,
2611 .open = ocfs2_file_open,
2612 .aio_read = ocfs2_file_aio_read,
2613 .aio_write = ocfs2_file_aio_write,
2614 .unlocked_ioctl = ocfs2_ioctl,
2615 #ifdef CONFIG_COMPAT
2616 .compat_ioctl = ocfs2_compat_ioctl,
2619 .flock = ocfs2_flock,
2620 .splice_read = ocfs2_file_splice_read,
2621 .splice_write = ocfs2_file_splice_write,
2624 const struct file_operations ocfs2_dops = {
2625 .llseek = generic_file_llseek,
2626 .read = generic_read_dir,
2627 .readdir = ocfs2_readdir,
2628 .fsync = ocfs2_sync_file,
2629 .release = ocfs2_dir_release,
2630 .open = ocfs2_dir_open,
2631 .unlocked_ioctl = ocfs2_ioctl,
2632 #ifdef CONFIG_COMPAT
2633 .compat_ioctl = ocfs2_compat_ioctl,
2636 .flock = ocfs2_flock,
2640 * POSIX-lockless variants of our file_operations.
2642 * These will be used if the underlying cluster stack does not support
2643 * posix file locking, if the user passes the "localflocks" mount
2644 * option, or if we have a local-only fs.
2646 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2647 * so we still want it in the case of no stack support for
2648 * plocks. Internally, it will do the right thing when asked to ignore
2651 const struct file_operations ocfs2_fops_no_plocks = {
2652 .llseek = generic_file_llseek,
2653 .read = do_sync_read,
2654 .write = do_sync_write,
2656 .fsync = ocfs2_sync_file,
2657 .release = ocfs2_file_release,
2658 .open = ocfs2_file_open,
2659 .aio_read = ocfs2_file_aio_read,
2660 .aio_write = ocfs2_file_aio_write,
2661 .unlocked_ioctl = ocfs2_ioctl,
2662 #ifdef CONFIG_COMPAT
2663 .compat_ioctl = ocfs2_compat_ioctl,
2665 .flock = ocfs2_flock,
2666 .splice_read = ocfs2_file_splice_read,
2667 .splice_write = ocfs2_file_splice_write,
2670 const struct file_operations ocfs2_dops_no_plocks = {
2671 .llseek = generic_file_llseek,
2672 .read = generic_read_dir,
2673 .readdir = ocfs2_readdir,
2674 .fsync = ocfs2_sync_file,
2675 .release = ocfs2_dir_release,
2676 .open = ocfs2_dir_open,
2677 .unlocked_ioctl = ocfs2_ioctl,
2678 #ifdef CONFIG_COMPAT
2679 .compat_ioctl = ocfs2_compat_ioctl,
2681 .flock = ocfs2_flock,