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>
39 #define MLOG_MASK_PREFIX ML_INODE
40 #include <cluster/masklog.h>
48 #include "extent_map.h"
61 #include "buffer_head_io.h"
63 static int ocfs2_sync_inode(struct inode *inode)
65 filemap_fdatawrite(inode->i_mapping);
66 return sync_mapping_buffers(inode->i_mapping);
69 static int ocfs2_init_file_private(struct inode *inode, struct file *file)
71 struct ocfs2_file_private *fp;
73 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
78 mutex_init(&fp->fp_mutex);
79 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
80 file->private_data = fp;
85 static void ocfs2_free_file_private(struct inode *inode, struct file *file)
87 struct ocfs2_file_private *fp = file->private_data;
88 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
91 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
92 ocfs2_lock_res_free(&fp->fp_flock);
94 file->private_data = NULL;
98 static int ocfs2_file_open(struct inode *inode, struct file *file)
101 int mode = file->f_flags;
102 struct ocfs2_inode_info *oi = OCFS2_I(inode);
104 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
105 file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name);
107 spin_lock(&oi->ip_lock);
109 /* Check that the inode hasn't been wiped from disk by another
110 * node. If it hasn't then we're safe as long as we hold the
111 * spin lock until our increment of open count. */
112 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
113 spin_unlock(&oi->ip_lock);
120 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
123 spin_unlock(&oi->ip_lock);
125 status = ocfs2_init_file_private(inode, file);
128 * We want to set open count back if we're failing the
131 spin_lock(&oi->ip_lock);
133 spin_unlock(&oi->ip_lock);
141 static int ocfs2_file_release(struct inode *inode, struct file *file)
143 struct ocfs2_inode_info *oi = OCFS2_I(inode);
145 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
146 file->f_path.dentry->d_name.len,
147 file->f_path.dentry->d_name.name);
149 spin_lock(&oi->ip_lock);
150 if (!--oi->ip_open_count)
151 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
152 spin_unlock(&oi->ip_lock);
154 ocfs2_free_file_private(inode, file);
161 static int ocfs2_dir_open(struct inode *inode, struct file *file)
163 return ocfs2_init_file_private(inode, file);
166 static int ocfs2_dir_release(struct inode *inode, struct file *file)
168 ocfs2_free_file_private(inode, file);
172 static int ocfs2_sync_file(struct file *file,
173 struct dentry *dentry,
178 struct inode *inode = dentry->d_inode;
179 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
181 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync,
182 dentry->d_name.len, dentry->d_name.name);
184 err = ocfs2_sync_inode(dentry->d_inode);
188 journal = osb->journal->j_journal;
189 err = jbd2_journal_force_commit(journal);
194 return (err < 0) ? -EIO : 0;
197 int ocfs2_should_update_atime(struct inode *inode,
198 struct vfsmount *vfsmnt)
201 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
203 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
206 if ((inode->i_flags & S_NOATIME) ||
207 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
211 * We can be called with no vfsmnt structure - NFSD will
214 * Note that our action here is different than touch_atime() -
215 * if we can't tell whether this is a noatime mount, then we
216 * don't know whether to trust the value of s_atime_quantum.
221 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
222 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
225 if (vfsmnt->mnt_flags & MNT_RELATIME) {
226 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
227 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
234 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
240 int ocfs2_update_inode_atime(struct inode *inode,
241 struct buffer_head *bh)
244 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
246 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
250 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
251 if (IS_ERR(handle)) {
252 ret = PTR_ERR(handle);
257 ret = ocfs2_journal_access(handle, inode, bh,
258 OCFS2_JOURNAL_ACCESS_WRITE);
265 * Don't use ocfs2_mark_inode_dirty() here as we don't always
266 * have i_mutex to guard against concurrent changes to other
269 inode->i_atime = CURRENT_TIME;
270 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
271 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
273 ret = ocfs2_journal_dirty(handle, bh);
278 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
284 static int ocfs2_set_inode_size(handle_t *handle,
286 struct buffer_head *fe_bh,
292 i_size_write(inode, new_i_size);
293 inode->i_blocks = ocfs2_inode_sector_count(inode);
294 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
296 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
307 static int ocfs2_simple_size_update(struct inode *inode,
308 struct buffer_head *di_bh,
312 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
313 handle_t *handle = NULL;
315 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
316 if (IS_ERR(handle)) {
317 ret = PTR_ERR(handle);
322 ret = ocfs2_set_inode_size(handle, inode, di_bh,
327 ocfs2_commit_trans(osb, handle);
332 static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
334 struct buffer_head *fe_bh,
339 struct ocfs2_dinode *di;
344 /* TODO: This needs to actually orphan the inode in this
347 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
348 if (IS_ERR(handle)) {
349 status = PTR_ERR(handle);
354 status = ocfs2_journal_access(handle, inode, fe_bh,
355 OCFS2_JOURNAL_ACCESS_WRITE);
362 * Do this before setting i_size.
364 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
365 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
372 i_size_write(inode, new_i_size);
373 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
375 di = (struct ocfs2_dinode *) fe_bh->b_data;
376 di->i_size = cpu_to_le64(new_i_size);
377 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
378 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
380 status = ocfs2_journal_dirty(handle, fe_bh);
385 ocfs2_commit_trans(osb, handle);
392 static int ocfs2_truncate_file(struct inode *inode,
393 struct buffer_head *di_bh,
397 struct ocfs2_dinode *fe = NULL;
398 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
399 struct ocfs2_truncate_context *tc = NULL;
401 mlog_entry("(inode = %llu, new_i_size = %llu\n",
402 (unsigned long long)OCFS2_I(inode)->ip_blkno,
403 (unsigned long long)new_i_size);
405 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
406 * already validated it */
407 fe = (struct ocfs2_dinode *) di_bh->b_data;
409 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
410 "Inode %llu, inode i_size = %lld != di "
411 "i_size = %llu, i_flags = 0x%x\n",
412 (unsigned long long)OCFS2_I(inode)->ip_blkno,
414 (unsigned long long)le64_to_cpu(fe->i_size),
415 le32_to_cpu(fe->i_flags));
417 if (new_i_size > le64_to_cpu(fe->i_size)) {
418 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
419 (unsigned long long)le64_to_cpu(fe->i_size),
420 (unsigned long long)new_i_size);
426 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
427 (unsigned long long)le64_to_cpu(fe->i_blkno),
428 (unsigned long long)le64_to_cpu(fe->i_size),
429 (unsigned long long)new_i_size);
431 /* lets handle the simple truncate cases before doing any more
432 * cluster locking. */
433 if (new_i_size == le64_to_cpu(fe->i_size))
436 down_write(&OCFS2_I(inode)->ip_alloc_sem);
439 * The inode lock forced other nodes to sync and drop their
440 * pages, which (correctly) happens even if we have a truncate
441 * without allocation change - ocfs2 cluster sizes can be much
442 * greater than page size, so we have to truncate them
445 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
446 truncate_inode_pages(inode->i_mapping, new_i_size);
448 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
449 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
450 i_size_read(inode), 1);
454 goto bail_unlock_sem;
457 /* alright, we're going to need to do a full blown alloc size
458 * change. Orphan the inode so that recovery can complete the
459 * truncate if necessary. This does the task of marking
461 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
464 goto bail_unlock_sem;
467 status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc);
470 goto bail_unlock_sem;
473 status = ocfs2_commit_truncate(osb, inode, di_bh, tc);
476 goto bail_unlock_sem;
479 /* TODO: orphan dir cleanup here. */
481 up_write(&OCFS2_I(inode)->ip_alloc_sem);
490 * extend file allocation only here.
491 * we'll update all the disk stuff, and oip->alloc_size
493 * expect stuff to be locked, a transaction started and enough data /
494 * metadata reservations in the contexts.
496 * Will return -EAGAIN, and a reason if a restart is needed.
497 * If passed in, *reason will always be set, even in error.
499 int ocfs2_add_inode_data(struct ocfs2_super *osb,
504 struct buffer_head *fe_bh,
506 struct ocfs2_alloc_context *data_ac,
507 struct ocfs2_alloc_context *meta_ac,
508 enum ocfs2_alloc_restarted *reason_ret)
511 struct ocfs2_extent_tree et;
513 ocfs2_init_dinode_extent_tree(&et, inode, fe_bh);
514 ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
515 clusters_to_add, mark_unwritten,
517 data_ac, meta_ac, reason_ret);
522 static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
523 u32 clusters_to_add, int mark_unwritten)
526 int restart_func = 0;
529 struct buffer_head *bh = NULL;
530 struct ocfs2_dinode *fe = NULL;
531 handle_t *handle = NULL;
532 struct ocfs2_alloc_context *data_ac = NULL;
533 struct ocfs2_alloc_context *meta_ac = NULL;
534 enum ocfs2_alloc_restarted why;
535 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
536 struct ocfs2_extent_tree et;
538 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
541 * This function only exists for file systems which don't
544 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
546 status = ocfs2_read_inode_block(inode, &bh);
551 fe = (struct ocfs2_dinode *) bh->b_data;
554 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
556 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
557 "clusters_to_add = %u\n",
558 (unsigned long long)OCFS2_I(inode)->ip_blkno,
559 (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
561 ocfs2_init_dinode_extent_tree(&et, inode, bh);
562 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
569 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
571 handle = ocfs2_start_trans(osb, credits);
572 if (IS_ERR(handle)) {
573 status = PTR_ERR(handle);
579 restarted_transaction:
580 /* reserve a write to the file entry early on - that we if we
581 * run out of credits in the allocation path, we can still
583 status = ocfs2_journal_access(handle, inode, bh,
584 OCFS2_JOURNAL_ACCESS_WRITE);
590 prev_clusters = OCFS2_I(inode)->ip_clusters;
592 status = ocfs2_add_inode_data(osb,
602 if ((status < 0) && (status != -EAGAIN)) {
603 if (status != -ENOSPC)
608 status = ocfs2_journal_dirty(handle, bh);
614 spin_lock(&OCFS2_I(inode)->ip_lock);
615 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
616 spin_unlock(&OCFS2_I(inode)->ip_lock);
618 if (why != RESTART_NONE && clusters_to_add) {
619 if (why == RESTART_META) {
620 mlog(0, "restarting function.\n");
623 BUG_ON(why != RESTART_TRANS);
625 mlog(0, "restarting transaction.\n");
626 /* TODO: This can be more intelligent. */
627 credits = ocfs2_calc_extend_credits(osb->sb,
630 status = ocfs2_extend_trans(handle, credits);
632 /* handle still has to be committed at
638 goto restarted_transaction;
642 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
643 le32_to_cpu(fe->i_clusters),
644 (unsigned long long)le64_to_cpu(fe->i_size));
645 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
646 OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode));
650 ocfs2_commit_trans(osb, handle);
654 ocfs2_free_alloc_context(data_ac);
658 ocfs2_free_alloc_context(meta_ac);
661 if ((!status) && restart_func) {
672 /* Some parts of this taken from generic_cont_expand, which turned out
673 * to be too fragile to do exactly what we need without us having to
674 * worry about recursive locking in ->write_begin() and ->write_end(). */
675 static int ocfs2_write_zero_page(struct inode *inode,
678 struct address_space *mapping = inode->i_mapping;
682 handle_t *handle = NULL;
685 offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */
686 /* ugh. in prepare/commit_write, if from==to==start of block, we
687 ** skip the prepare. make sure we never send an offset for the start
690 if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) {
693 index = size >> PAGE_CACHE_SHIFT;
695 page = grab_cache_page(mapping, index);
702 ret = ocfs2_prepare_write_nolock(inode, page, offset, offset);
708 if (ocfs2_should_order_data(inode)) {
709 handle = ocfs2_start_walk_page_trans(inode, page, offset,
711 if (IS_ERR(handle)) {
712 ret = PTR_ERR(handle);
718 /* must not update i_size! */
719 ret = block_commit_write(page, offset, offset);
726 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
729 page_cache_release(page);
734 static int ocfs2_zero_extend(struct inode *inode,
739 struct super_block *sb = inode->i_sb;
741 start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
742 while (start_off < zero_to_size) {
743 ret = ocfs2_write_zero_page(inode, start_off);
749 start_off += sb->s_blocksize;
752 * Very large extends have the potential to lock up
753 * the cpu for extended periods of time.
762 int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to)
766 struct ocfs2_inode_info *oi = OCFS2_I(inode);
768 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
769 if (clusters_to_add < oi->ip_clusters)
772 clusters_to_add -= oi->ip_clusters;
774 if (clusters_to_add) {
775 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
784 * Call this even if we don't add any clusters to the tree. We
785 * still need to zero the area between the old i_size and the
788 ret = ocfs2_zero_extend(inode, zero_to);
796 static int ocfs2_extend_file(struct inode *inode,
797 struct buffer_head *di_bh,
801 struct ocfs2_inode_info *oi = OCFS2_I(inode);
805 /* setattr sometimes calls us like this. */
809 if (i_size_read(inode) == new_i_size)
811 BUG_ON(new_i_size < i_size_read(inode));
814 * Fall through for converting inline data, even if the fs
815 * supports sparse files.
817 * The check for inline data here is legal - nobody can add
818 * the feature since we have i_mutex. We must check it again
819 * after acquiring ip_alloc_sem though, as paths like mmap
820 * might have raced us to converting the inode to extents.
822 if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
823 && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
824 goto out_update_size;
827 * The alloc sem blocks people in read/write from reading our
828 * allocation until we're done changing it. We depend on
829 * i_mutex to block other extend/truncate calls while we're
832 down_write(&oi->ip_alloc_sem);
834 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
836 * We can optimize small extends by keeping the inodes
839 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
840 up_write(&oi->ip_alloc_sem);
841 goto out_update_size;
844 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
846 up_write(&oi->ip_alloc_sem);
853 if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
854 ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
856 up_write(&oi->ip_alloc_sem);
864 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
872 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
874 int status = 0, size_change;
875 struct inode *inode = dentry->d_inode;
876 struct super_block *sb = inode->i_sb;
877 struct ocfs2_super *osb = OCFS2_SB(sb);
878 struct buffer_head *bh = NULL;
879 handle_t *handle = NULL;
881 mlog_entry("(0x%p, '%.*s')\n", dentry,
882 dentry->d_name.len, dentry->d_name.name);
884 /* ensuring we don't even attempt to truncate a symlink */
885 if (S_ISLNK(inode->i_mode))
886 attr->ia_valid &= ~ATTR_SIZE;
888 if (attr->ia_valid & ATTR_MODE)
889 mlog(0, "mode change: %d\n", attr->ia_mode);
890 if (attr->ia_valid & ATTR_UID)
891 mlog(0, "uid change: %d\n", attr->ia_uid);
892 if (attr->ia_valid & ATTR_GID)
893 mlog(0, "gid change: %d\n", attr->ia_gid);
894 if (attr->ia_valid & ATTR_SIZE)
895 mlog(0, "size change...\n");
896 if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
897 mlog(0, "time change...\n");
899 #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
900 | ATTR_GID | ATTR_UID | ATTR_MODE)
901 if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
902 mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
906 status = inode_change_ok(inode, attr);
910 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
912 status = ocfs2_rw_lock(inode, 1);
919 status = ocfs2_inode_lock(inode, &bh, 1);
921 if (status != -ENOENT)
926 if (size_change && attr->ia_size != i_size_read(inode)) {
927 if (attr->ia_size > sb->s_maxbytes) {
932 if (i_size_read(inode) > attr->ia_size) {
933 if (ocfs2_should_order_data(inode)) {
934 status = ocfs2_begin_ordered_truncate(inode,
939 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
941 status = ocfs2_extend_file(inode, bh, attr->ia_size);
943 if (status != -ENOSPC)
950 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
951 if (IS_ERR(handle)) {
952 status = PTR_ERR(handle);
958 * This will intentionally not wind up calling vmtruncate(),
959 * since all the work for a size change has been done above.
960 * Otherwise, we could get into problems with truncate as
961 * ip_alloc_sem is used there to protect against i_size
964 status = inode_setattr(inode, attr);
970 status = ocfs2_mark_inode_dirty(handle, inode, bh);
975 ocfs2_commit_trans(osb, handle);
977 ocfs2_inode_unlock(inode, 1);
980 ocfs2_rw_unlock(inode, 1);
984 if (!status && attr->ia_valid & ATTR_MODE) {
985 status = ocfs2_acl_chmod(inode);
994 int ocfs2_getattr(struct vfsmount *mnt,
995 struct dentry *dentry,
998 struct inode *inode = dentry->d_inode;
999 struct super_block *sb = dentry->d_inode->i_sb;
1000 struct ocfs2_super *osb = sb->s_fs_info;
1005 err = ocfs2_inode_revalidate(dentry);
1012 generic_fillattr(inode, stat);
1014 /* We set the blksize from the cluster size for performance */
1015 stat->blksize = osb->s_clustersize;
1023 int ocfs2_permission(struct inode *inode, int mask)
1029 ret = ocfs2_inode_lock(inode, NULL, 0);
1036 ret = generic_permission(inode, mask, ocfs2_check_acl);
1038 ocfs2_inode_unlock(inode, 0);
1044 static int __ocfs2_write_remove_suid(struct inode *inode,
1045 struct buffer_head *bh)
1049 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1050 struct ocfs2_dinode *di;
1052 mlog_entry("(Inode %llu, mode 0%o)\n",
1053 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
1055 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1056 if (IS_ERR(handle)) {
1057 ret = PTR_ERR(handle);
1062 ret = ocfs2_journal_access(handle, inode, bh,
1063 OCFS2_JOURNAL_ACCESS_WRITE);
1069 inode->i_mode &= ~S_ISUID;
1070 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1071 inode->i_mode &= ~S_ISGID;
1073 di = (struct ocfs2_dinode *) bh->b_data;
1074 di->i_mode = cpu_to_le16(inode->i_mode);
1076 ret = ocfs2_journal_dirty(handle, bh);
1081 ocfs2_commit_trans(osb, handle);
1088 * Will look for holes and unwritten extents in the range starting at
1089 * pos for count bytes (inclusive).
1091 static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
1095 unsigned int extent_flags;
1096 u32 cpos, clusters, extent_len, phys_cpos;
1097 struct super_block *sb = inode->i_sb;
1099 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
1100 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
1103 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
1110 if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
1115 if (extent_len > clusters)
1116 extent_len = clusters;
1118 clusters -= extent_len;
1125 static int ocfs2_write_remove_suid(struct inode *inode)
1128 struct buffer_head *bh = NULL;
1130 ret = ocfs2_read_inode_block(inode, &bh);
1136 ret = __ocfs2_write_remove_suid(inode, bh);
1143 * Allocate enough extents to cover the region starting at byte offset
1144 * start for len bytes. Existing extents are skipped, any extents
1145 * added are marked as "unwritten".
1147 static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1151 u32 cpos, phys_cpos, clusters, alloc_size;
1152 u64 end = start + len;
1153 struct buffer_head *di_bh = NULL;
1155 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1156 ret = ocfs2_read_inode_block(inode, &di_bh);
1163 * Nothing to do if the requested reservation range
1164 * fits within the inode.
1166 if (ocfs2_size_fits_inline_data(di_bh, end))
1169 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1177 * We consider both start and len to be inclusive.
1179 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1180 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1184 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1192 * Hole or existing extent len can be arbitrary, so
1193 * cap it to our own allocation request.
1195 if (alloc_size > clusters)
1196 alloc_size = clusters;
1200 * We already have an allocation at this
1201 * region so we can safely skip it.
1206 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1215 clusters -= alloc_size;
1226 * Truncate a byte range, avoiding pages within partial clusters. This
1227 * preserves those pages for the zeroing code to write to.
1229 static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1232 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1234 struct address_space *mapping = inode->i_mapping;
1236 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1237 end = byte_start + byte_len;
1238 end = end & ~(osb->s_clustersize - 1);
1241 unmap_mapping_range(mapping, start, end - start, 0);
1242 truncate_inode_pages_range(mapping, start, end - 1);
1246 static int ocfs2_zero_partial_clusters(struct inode *inode,
1250 u64 tmpend, end = start + len;
1251 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1252 unsigned int csize = osb->s_clustersize;
1256 * The "start" and "end" values are NOT necessarily part of
1257 * the range whose allocation is being deleted. Rather, this
1258 * is what the user passed in with the request. We must zero
1259 * partial clusters here. There's no need to worry about
1260 * physical allocation - the zeroing code knows to skip holes.
1262 mlog(0, "byte start: %llu, end: %llu\n",
1263 (unsigned long long)start, (unsigned long long)end);
1266 * If both edges are on a cluster boundary then there's no
1267 * zeroing required as the region is part of the allocation to
1270 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1273 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1274 if (IS_ERR(handle)) {
1275 ret = PTR_ERR(handle);
1281 * We want to get the byte offset of the end of the 1st cluster.
1283 tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
1287 mlog(0, "1st range: start: %llu, tmpend: %llu\n",
1288 (unsigned long long)start, (unsigned long long)tmpend);
1290 ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
1296 * This may make start and end equal, but the zeroing
1297 * code will skip any work in that case so there's no
1298 * need to catch it up here.
1300 start = end & ~(osb->s_clustersize - 1);
1302 mlog(0, "2nd range: start: %llu, end: %llu\n",
1303 (unsigned long long)start, (unsigned long long)end);
1305 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1310 ocfs2_commit_trans(osb, handle);
1315 static int ocfs2_remove_inode_range(struct inode *inode,
1316 struct buffer_head *di_bh, u64 byte_start,
1320 u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
1321 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1322 struct ocfs2_cached_dealloc_ctxt dealloc;
1323 struct address_space *mapping = inode->i_mapping;
1324 struct ocfs2_extent_tree et;
1326 ocfs2_init_dinode_extent_tree(&et, inode, di_bh);
1327 ocfs2_init_dealloc_ctxt(&dealloc);
1332 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1333 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
1334 byte_start + byte_len, 0);
1340 * There's no need to get fancy with the page cache
1341 * truncate of an inline-data inode. We're talking
1342 * about less than a page here, which will be cached
1343 * in the dinode buffer anyway.
1345 unmap_mapping_range(mapping, 0, 0, 0);
1346 truncate_inode_pages(mapping, 0);
1350 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
1351 trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
1352 if (trunc_len >= trunc_start)
1353 trunc_len -= trunc_start;
1357 mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
1358 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1359 (unsigned long long)byte_start,
1360 (unsigned long long)byte_len, trunc_start, trunc_len);
1362 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1370 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1377 if (alloc_size > trunc_len)
1378 alloc_size = trunc_len;
1380 /* Only do work for non-holes */
1381 if (phys_cpos != 0) {
1382 ret = ocfs2_remove_btree_range(inode, &et, cpos,
1383 phys_cpos, alloc_size,
1392 trunc_len -= alloc_size;
1395 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1398 ocfs2_schedule_truncate_log_flush(osb, 1);
1399 ocfs2_run_deallocs(osb, &dealloc);
1405 * Parts of this function taken from xfs_change_file_space()
1407 static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1408 loff_t f_pos, unsigned int cmd,
1409 struct ocfs2_space_resv *sr,
1415 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1416 struct buffer_head *di_bh = NULL;
1418 unsigned long long max_off = inode->i_sb->s_maxbytes;
1420 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1423 mutex_lock(&inode->i_mutex);
1426 * This prevents concurrent writes on other nodes
1428 ret = ocfs2_rw_lock(inode, 1);
1434 ret = ocfs2_inode_lock(inode, &di_bh, 1);
1440 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1442 goto out_inode_unlock;
1445 switch (sr->l_whence) {
1446 case 0: /*SEEK_SET*/
1448 case 1: /*SEEK_CUR*/
1449 sr->l_start += f_pos;
1451 case 2: /*SEEK_END*/
1452 sr->l_start += i_size_read(inode);
1456 goto out_inode_unlock;
1460 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1463 || sr->l_start > max_off
1464 || (sr->l_start + llen) < 0
1465 || (sr->l_start + llen) > max_off) {
1467 goto out_inode_unlock;
1469 size = sr->l_start + sr->l_len;
1471 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1472 if (sr->l_len <= 0) {
1474 goto out_inode_unlock;
1478 if (file && should_remove_suid(file->f_path.dentry)) {
1479 ret = __ocfs2_write_remove_suid(inode, di_bh);
1482 goto out_inode_unlock;
1486 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1488 case OCFS2_IOC_RESVSP:
1489 case OCFS2_IOC_RESVSP64:
1491 * This takes unsigned offsets, but the signed ones we
1492 * pass have been checked against overflow above.
1494 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1497 case OCFS2_IOC_UNRESVSP:
1498 case OCFS2_IOC_UNRESVSP64:
1499 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1505 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1508 goto out_inode_unlock;
1512 * We update c/mtime for these changes
1514 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1515 if (IS_ERR(handle)) {
1516 ret = PTR_ERR(handle);
1518 goto out_inode_unlock;
1521 if (change_size && i_size_read(inode) < size)
1522 i_size_write(inode, size);
1524 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1525 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1529 ocfs2_commit_trans(osb, handle);
1533 ocfs2_inode_unlock(inode, 1);
1535 ocfs2_rw_unlock(inode, 1);
1538 mutex_unlock(&inode->i_mutex);
1542 int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1543 struct ocfs2_space_resv *sr)
1545 struct inode *inode = file->f_path.dentry->d_inode;
1546 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);;
1548 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1549 !ocfs2_writes_unwritten_extents(osb))
1551 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1552 !ocfs2_sparse_alloc(osb))
1555 if (!S_ISREG(inode->i_mode))
1558 if (!(file->f_mode & FMODE_WRITE))
1561 return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
1564 static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
1567 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1568 struct ocfs2_space_resv sr;
1569 int change_size = 1;
1571 if (!ocfs2_writes_unwritten_extents(osb))
1574 if (S_ISDIR(inode->i_mode))
1577 if (mode & FALLOC_FL_KEEP_SIZE)
1581 sr.l_start = (s64)offset;
1582 sr.l_len = (s64)len;
1584 return __ocfs2_change_file_space(NULL, inode, offset,
1585 OCFS2_IOC_RESVSP64, &sr, change_size);
1588 static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
1594 int ret = 0, meta_level = 0;
1595 struct inode *inode = dentry->d_inode;
1596 loff_t saved_pos, end;
1599 * We start with a read level meta lock and only jump to an ex
1600 * if we need to make modifications here.
1603 ret = ocfs2_inode_lock(inode, NULL, meta_level);
1610 /* Clear suid / sgid if necessary. We do this here
1611 * instead of later in the write path because
1612 * remove_suid() calls ->setattr without any hint that
1613 * we may have already done our cluster locking. Since
1614 * ocfs2_setattr() *must* take cluster locks to
1615 * proceeed, this will lead us to recursively lock the
1616 * inode. There's also the dinode i_size state which
1617 * can be lost via setattr during extending writes (we
1618 * set inode->i_size at the end of a write. */
1619 if (should_remove_suid(dentry)) {
1620 if (meta_level == 0) {
1621 ocfs2_inode_unlock(inode, meta_level);
1626 ret = ocfs2_write_remove_suid(inode);
1633 /* work on a copy of ppos until we're sure that we won't have
1634 * to recalculate it due to relocking. */
1636 saved_pos = i_size_read(inode);
1637 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
1642 end = saved_pos + count;
1645 * Skip the O_DIRECT checks if we don't need
1648 if (!direct_io || !(*direct_io))
1652 * There's no sane way to do direct writes to an inode
1655 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1661 * Allowing concurrent direct writes means
1662 * i_size changes wouldn't be synchronized, so
1663 * one node could wind up truncating another
1666 if (end > i_size_read(inode)) {
1672 * We don't fill holes during direct io, so
1673 * check for them here. If any are found, the
1674 * caller will have to retake some cluster
1675 * locks and initiate the io as buffered.
1677 ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
1690 ocfs2_inode_unlock(inode, meta_level);
1696 static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
1697 const struct iovec *iov,
1698 unsigned long nr_segs,
1701 int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
1703 ssize_t written = 0;
1704 size_t ocount; /* original count */
1705 size_t count; /* after file limit checks */
1706 loff_t old_size, *ppos = &iocb->ki_pos;
1708 struct file *file = iocb->ki_filp;
1709 struct inode *inode = file->f_path.dentry->d_inode;
1710 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1712 mlog_entry("(0x%p, %u, '%.*s')\n", file,
1713 (unsigned int)nr_segs,
1714 file->f_path.dentry->d_name.len,
1715 file->f_path.dentry->d_name.name);
1717 if (iocb->ki_left == 0)
1720 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
1722 appending = file->f_flags & O_APPEND ? 1 : 0;
1723 direct_io = file->f_flags & O_DIRECT ? 1 : 0;
1725 mutex_lock(&inode->i_mutex);
1728 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
1730 down_read(&inode->i_alloc_sem);
1734 /* concurrent O_DIRECT writes are allowed */
1735 rw_level = !direct_io;
1736 ret = ocfs2_rw_lock(inode, rw_level);
1742 can_do_direct = direct_io;
1743 ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos,
1744 iocb->ki_left, appending,
1752 * We can't complete the direct I/O as requested, fall back to
1755 if (direct_io && !can_do_direct) {
1756 ocfs2_rw_unlock(inode, rw_level);
1757 up_read(&inode->i_alloc_sem);
1767 * To later detect whether a journal commit for sync writes is
1768 * necessary, we sample i_size, and cluster count here.
1770 old_size = i_size_read(inode);
1771 old_clusters = OCFS2_I(inode)->ip_clusters;
1773 /* communicate with ocfs2_dio_end_io */
1774 ocfs2_iocb_set_rw_locked(iocb, rw_level);
1777 ret = generic_segment_checks(iov, &nr_segs, &ocount,
1782 ret = generic_write_checks(file, ppos, &count,
1783 S_ISBLK(inode->i_mode));
1787 written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
1788 ppos, count, ocount);
1791 * direct write may have instantiated a few
1792 * blocks outside i_size. Trim these off again.
1793 * Don't need i_size_read because we hold i_mutex.
1795 if (*ppos + count > inode->i_size)
1796 vmtruncate(inode, inode->i_size);
1801 written = generic_file_aio_write_nolock(iocb, iov, nr_segs,
1806 /* buffered aio wouldn't have proper lock coverage today */
1807 BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
1809 if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
1811 * The generic write paths have handled getting data
1812 * to disk, but since we don't make use of the dirty
1813 * inode list, a manual journal commit is necessary
1816 if (old_size != i_size_read(inode) ||
1817 old_clusters != OCFS2_I(inode)->ip_clusters) {
1818 ret = jbd2_journal_force_commit(osb->journal->j_journal);
1825 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
1826 * function pointer which is called when o_direct io completes so that
1827 * it can unlock our rw lock. (it's the clustered equivalent of
1828 * i_alloc_sem; protects truncate from racing with pending ios).
1829 * Unfortunately there are error cases which call end_io and others
1830 * that don't. so we don't have to unlock the rw_lock if either an
1831 * async dio is going to do it in the future or an end_io after an
1832 * error has already done it.
1834 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
1841 ocfs2_rw_unlock(inode, rw_level);
1845 up_read(&inode->i_alloc_sem);
1847 mutex_unlock(&inode->i_mutex);
1850 return written ? written : ret;
1853 static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
1860 struct inode *inode = out->f_path.dentry->d_inode;
1862 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe,
1864 out->f_path.dentry->d_name.len,
1865 out->f_path.dentry->d_name.name);
1867 inode_double_lock(inode, pipe->inode);
1869 ret = ocfs2_rw_lock(inode, 1);
1875 ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0,
1882 ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags);
1885 ocfs2_rw_unlock(inode, 1);
1887 inode_double_unlock(inode, pipe->inode);
1893 static ssize_t ocfs2_file_splice_read(struct file *in,
1895 struct pipe_inode_info *pipe,
1900 struct inode *inode = in->f_path.dentry->d_inode;
1902 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe,
1904 in->f_path.dentry->d_name.len,
1905 in->f_path.dentry->d_name.name);
1908 * See the comment in ocfs2_file_aio_read()
1910 ret = ocfs2_inode_lock(inode, NULL, 0);
1915 ocfs2_inode_unlock(inode, 0);
1917 ret = generic_file_splice_read(in, ppos, pipe, len, flags);
1924 static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
1925 const struct iovec *iov,
1926 unsigned long nr_segs,
1929 int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
1930 struct file *filp = iocb->ki_filp;
1931 struct inode *inode = filp->f_path.dentry->d_inode;
1933 mlog_entry("(0x%p, %u, '%.*s')\n", filp,
1934 (unsigned int)nr_segs,
1935 filp->f_path.dentry->d_name.len,
1936 filp->f_path.dentry->d_name.name);
1945 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
1946 * need locks to protect pending reads from racing with truncate.
1948 if (filp->f_flags & O_DIRECT) {
1949 down_read(&inode->i_alloc_sem);
1952 ret = ocfs2_rw_lock(inode, 0);
1958 /* communicate with ocfs2_dio_end_io */
1959 ocfs2_iocb_set_rw_locked(iocb, rw_level);
1963 * We're fine letting folks race truncates and extending
1964 * writes with read across the cluster, just like they can
1965 * locally. Hence no rw_lock during read.
1967 * Take and drop the meta data lock to update inode fields
1968 * like i_size. This allows the checks down below
1969 * generic_file_aio_read() a chance of actually working.
1971 ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
1976 ocfs2_inode_unlock(inode, lock_level);
1978 ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
1980 mlog(0, "generic_file_aio_read returned -EINVAL\n");
1982 /* buffered aio wouldn't have proper lock coverage today */
1983 BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
1985 /* see ocfs2_file_aio_write */
1986 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
1993 up_read(&inode->i_alloc_sem);
1995 ocfs2_rw_unlock(inode, rw_level);
2001 const struct inode_operations ocfs2_file_iops = {
2002 .setattr = ocfs2_setattr,
2003 .getattr = ocfs2_getattr,
2004 .permission = ocfs2_permission,
2005 .setxattr = generic_setxattr,
2006 .getxattr = generic_getxattr,
2007 .listxattr = ocfs2_listxattr,
2008 .removexattr = generic_removexattr,
2009 .fallocate = ocfs2_fallocate,
2010 .fiemap = ocfs2_fiemap,
2013 const struct inode_operations ocfs2_special_file_iops = {
2014 .setattr = ocfs2_setattr,
2015 .getattr = ocfs2_getattr,
2016 .permission = ocfs2_permission,
2020 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2021 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2023 const struct file_operations ocfs2_fops = {
2024 .llseek = generic_file_llseek,
2025 .read = do_sync_read,
2026 .write = do_sync_write,
2028 .fsync = ocfs2_sync_file,
2029 .release = ocfs2_file_release,
2030 .open = ocfs2_file_open,
2031 .aio_read = ocfs2_file_aio_read,
2032 .aio_write = ocfs2_file_aio_write,
2033 .unlocked_ioctl = ocfs2_ioctl,
2034 #ifdef CONFIG_COMPAT
2035 .compat_ioctl = ocfs2_compat_ioctl,
2038 .flock = ocfs2_flock,
2039 .splice_read = ocfs2_file_splice_read,
2040 .splice_write = ocfs2_file_splice_write,
2043 const struct file_operations ocfs2_dops = {
2044 .llseek = generic_file_llseek,
2045 .read = generic_read_dir,
2046 .readdir = ocfs2_readdir,
2047 .fsync = ocfs2_sync_file,
2048 .release = ocfs2_dir_release,
2049 .open = ocfs2_dir_open,
2050 .unlocked_ioctl = ocfs2_ioctl,
2051 #ifdef CONFIG_COMPAT
2052 .compat_ioctl = ocfs2_compat_ioctl,
2055 .flock = ocfs2_flock,
2059 * POSIX-lockless variants of our file_operations.
2061 * These will be used if the underlying cluster stack does not support
2062 * posix file locking, if the user passes the "localflocks" mount
2063 * option, or if we have a local-only fs.
2065 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2066 * so we still want it in the case of no stack support for
2067 * plocks. Internally, it will do the right thing when asked to ignore
2070 const struct file_operations ocfs2_fops_no_plocks = {
2071 .llseek = generic_file_llseek,
2072 .read = do_sync_read,
2073 .write = do_sync_write,
2075 .fsync = ocfs2_sync_file,
2076 .release = ocfs2_file_release,
2077 .open = ocfs2_file_open,
2078 .aio_read = ocfs2_file_aio_read,
2079 .aio_write = ocfs2_file_aio_write,
2080 .unlocked_ioctl = ocfs2_ioctl,
2081 #ifdef CONFIG_COMPAT
2082 .compat_ioctl = ocfs2_compat_ioctl,
2084 .flock = ocfs2_flock,
2085 .splice_read = ocfs2_file_splice_read,
2086 .splice_write = ocfs2_file_splice_write,
2089 const struct file_operations ocfs2_dops_no_plocks = {
2090 .llseek = generic_file_llseek,
2091 .read = generic_read_dir,
2092 .readdir = ocfs2_readdir,
2093 .fsync = ocfs2_sync_file,
2094 .release = ocfs2_dir_release,
2095 .open = ocfs2_dir_open,
2096 .unlocked_ioctl = ocfs2_ioctl,
2097 #ifdef CONFIG_COMPAT
2098 .compat_ioctl = ocfs2_compat_ioctl,
2100 .flock = ocfs2_flock,