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"
60 #include "buffer_head_io.h"
62 static int ocfs2_sync_inode(struct inode *inode)
64 filemap_fdatawrite(inode->i_mapping);
65 return sync_mapping_buffers(inode->i_mapping);
68 static int ocfs2_init_file_private(struct inode *inode, struct file *file)
70 struct ocfs2_file_private *fp;
72 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
77 mutex_init(&fp->fp_mutex);
78 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
79 file->private_data = fp;
84 static void ocfs2_free_file_private(struct inode *inode, struct file *file)
86 struct ocfs2_file_private *fp = file->private_data;
87 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
90 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
91 ocfs2_lock_res_free(&fp->fp_flock);
93 file->private_data = NULL;
97 static int ocfs2_file_open(struct inode *inode, struct file *file)
100 int mode = file->f_flags;
101 struct ocfs2_inode_info *oi = OCFS2_I(inode);
103 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
104 file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name);
106 spin_lock(&oi->ip_lock);
108 /* Check that the inode hasn't been wiped from disk by another
109 * node. If it hasn't then we're safe as long as we hold the
110 * spin lock until our increment of open count. */
111 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
112 spin_unlock(&oi->ip_lock);
119 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
122 spin_unlock(&oi->ip_lock);
124 status = ocfs2_init_file_private(inode, file);
127 * We want to set open count back if we're failing the
130 spin_lock(&oi->ip_lock);
132 spin_unlock(&oi->ip_lock);
140 static int ocfs2_file_release(struct inode *inode, struct file *file)
142 struct ocfs2_inode_info *oi = OCFS2_I(inode);
144 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
145 file->f_path.dentry->d_name.len,
146 file->f_path.dentry->d_name.name);
148 spin_lock(&oi->ip_lock);
149 if (!--oi->ip_open_count)
150 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
151 spin_unlock(&oi->ip_lock);
153 ocfs2_free_file_private(inode, file);
160 static int ocfs2_dir_open(struct inode *inode, struct file *file)
162 return ocfs2_init_file_private(inode, file);
165 static int ocfs2_dir_release(struct inode *inode, struct file *file)
167 ocfs2_free_file_private(inode, file);
171 static int ocfs2_sync_file(struct file *file,
172 struct dentry *dentry,
177 struct inode *inode = dentry->d_inode;
178 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
180 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync,
181 dentry->d_name.len, dentry->d_name.name);
183 err = ocfs2_sync_inode(dentry->d_inode);
187 journal = osb->journal->j_journal;
188 err = jbd2_journal_force_commit(journal);
193 return (err < 0) ? -EIO : 0;
196 int ocfs2_should_update_atime(struct inode *inode,
197 struct vfsmount *vfsmnt)
200 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
202 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
205 if ((inode->i_flags & S_NOATIME) ||
206 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
210 * We can be called with no vfsmnt structure - NFSD will
213 * Note that our action here is different than touch_atime() -
214 * if we can't tell whether this is a noatime mount, then we
215 * don't know whether to trust the value of s_atime_quantum.
220 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
221 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
224 if (vfsmnt->mnt_flags & MNT_RELATIME) {
225 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
226 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
233 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
239 int ocfs2_update_inode_atime(struct inode *inode,
240 struct buffer_head *bh)
243 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
245 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
249 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
250 if (handle == NULL) {
256 ret = ocfs2_journal_access(handle, inode, bh,
257 OCFS2_JOURNAL_ACCESS_WRITE);
264 * Don't use ocfs2_mark_inode_dirty() here as we don't always
265 * have i_mutex to guard against concurrent changes to other
268 inode->i_atime = CURRENT_TIME;
269 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
270 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
272 ret = ocfs2_journal_dirty(handle, bh);
277 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
283 static int ocfs2_set_inode_size(handle_t *handle,
285 struct buffer_head *fe_bh,
291 i_size_write(inode, new_i_size);
292 inode->i_blocks = ocfs2_inode_sector_count(inode);
293 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
295 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
306 static int ocfs2_simple_size_update(struct inode *inode,
307 struct buffer_head *di_bh,
311 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
312 handle_t *handle = NULL;
314 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
315 if (handle == NULL) {
321 ret = ocfs2_set_inode_size(handle, inode, di_bh,
326 ocfs2_commit_trans(osb, handle);
331 static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
333 struct buffer_head *fe_bh,
338 struct ocfs2_dinode *di;
343 /* TODO: This needs to actually orphan the inode in this
346 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
347 if (IS_ERR(handle)) {
348 status = PTR_ERR(handle);
353 status = ocfs2_journal_access(handle, inode, fe_bh,
354 OCFS2_JOURNAL_ACCESS_WRITE);
361 * Do this before setting i_size.
363 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
364 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
371 i_size_write(inode, new_i_size);
372 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
374 di = (struct ocfs2_dinode *) fe_bh->b_data;
375 di->i_size = cpu_to_le64(new_i_size);
376 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
377 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
379 status = ocfs2_journal_dirty(handle, fe_bh);
384 ocfs2_commit_trans(osb, handle);
391 static int ocfs2_truncate_file(struct inode *inode,
392 struct buffer_head *di_bh,
396 struct ocfs2_dinode *fe = NULL;
397 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
398 struct ocfs2_truncate_context *tc = NULL;
400 mlog_entry("(inode = %llu, new_i_size = %llu\n",
401 (unsigned long long)OCFS2_I(inode)->ip_blkno,
402 (unsigned long long)new_i_size);
404 fe = (struct ocfs2_dinode *) di_bh->b_data;
405 if (!OCFS2_IS_VALID_DINODE(fe)) {
406 OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
411 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
412 "Inode %llu, inode i_size = %lld != di "
413 "i_size = %llu, i_flags = 0x%x\n",
414 (unsigned long long)OCFS2_I(inode)->ip_blkno,
416 (unsigned long long)le64_to_cpu(fe->i_size),
417 le32_to_cpu(fe->i_flags));
419 if (new_i_size > le64_to_cpu(fe->i_size)) {
420 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
421 (unsigned long long)le64_to_cpu(fe->i_size),
422 (unsigned long long)new_i_size);
428 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
429 (unsigned long long)le64_to_cpu(fe->i_blkno),
430 (unsigned long long)le64_to_cpu(fe->i_size),
431 (unsigned long long)new_i_size);
433 /* lets handle the simple truncate cases before doing any more
434 * cluster locking. */
435 if (new_i_size == le64_to_cpu(fe->i_size))
438 down_write(&OCFS2_I(inode)->ip_alloc_sem);
441 * The inode lock forced other nodes to sync and drop their
442 * pages, which (correctly) happens even if we have a truncate
443 * without allocation change - ocfs2 cluster sizes can be much
444 * greater than page size, so we have to truncate them
447 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
448 truncate_inode_pages(inode->i_mapping, new_i_size);
450 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
451 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
452 i_size_read(inode), 1);
456 goto bail_unlock_sem;
459 /* alright, we're going to need to do a full blown alloc size
460 * change. Orphan the inode so that recovery can complete the
461 * truncate if necessary. This does the task of marking
463 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
466 goto bail_unlock_sem;
469 status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc);
472 goto bail_unlock_sem;
475 status = ocfs2_commit_truncate(osb, inode, di_bh, tc);
478 goto bail_unlock_sem;
481 /* TODO: orphan dir cleanup here. */
483 up_write(&OCFS2_I(inode)->ip_alloc_sem);
492 * extend file allocation only here.
493 * we'll update all the disk stuff, and oip->alloc_size
495 * expect stuff to be locked, a transaction started and enough data /
496 * metadata reservations in the contexts.
498 * Will return -EAGAIN, and a reason if a restart is needed.
499 * If passed in, *reason will always be set, even in error.
501 int ocfs2_add_inode_data(struct ocfs2_super *osb,
506 struct buffer_head *fe_bh,
508 struct ocfs2_alloc_context *data_ac,
509 struct ocfs2_alloc_context *meta_ac,
510 enum ocfs2_alloc_restarted *reason_ret)
513 struct ocfs2_extent_tree et;
515 ocfs2_init_dinode_extent_tree(&et, inode, fe_bh);
516 ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
517 clusters_to_add, mark_unwritten,
519 data_ac, meta_ac, reason_ret);
524 static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
525 u32 clusters_to_add, int mark_unwritten)
528 int restart_func = 0;
531 struct buffer_head *bh = NULL;
532 struct ocfs2_dinode *fe = NULL;
533 handle_t *handle = NULL;
534 struct ocfs2_alloc_context *data_ac = NULL;
535 struct ocfs2_alloc_context *meta_ac = NULL;
536 enum ocfs2_alloc_restarted why;
537 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
538 struct ocfs2_extent_tree et;
540 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
543 * This function only exists for file systems which don't
546 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
548 status = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno, &bh);
554 fe = (struct ocfs2_dinode *) bh->b_data;
555 if (!OCFS2_IS_VALID_DINODE(fe)) {
556 OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
562 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
564 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
565 "clusters_to_add = %u\n",
566 (unsigned long long)OCFS2_I(inode)->ip_blkno,
567 (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
569 ocfs2_init_dinode_extent_tree(&et, inode, bh);
570 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
577 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
579 handle = ocfs2_start_trans(osb, credits);
580 if (IS_ERR(handle)) {
581 status = PTR_ERR(handle);
587 restarted_transaction:
588 /* reserve a write to the file entry early on - that we if we
589 * run out of credits in the allocation path, we can still
591 status = ocfs2_journal_access(handle, inode, bh,
592 OCFS2_JOURNAL_ACCESS_WRITE);
598 prev_clusters = OCFS2_I(inode)->ip_clusters;
600 status = ocfs2_add_inode_data(osb,
610 if ((status < 0) && (status != -EAGAIN)) {
611 if (status != -ENOSPC)
616 status = ocfs2_journal_dirty(handle, bh);
622 spin_lock(&OCFS2_I(inode)->ip_lock);
623 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
624 spin_unlock(&OCFS2_I(inode)->ip_lock);
626 if (why != RESTART_NONE && clusters_to_add) {
627 if (why == RESTART_META) {
628 mlog(0, "restarting function.\n");
631 BUG_ON(why != RESTART_TRANS);
633 mlog(0, "restarting transaction.\n");
634 /* TODO: This can be more intelligent. */
635 credits = ocfs2_calc_extend_credits(osb->sb,
638 status = ocfs2_extend_trans(handle, credits);
640 /* handle still has to be committed at
646 goto restarted_transaction;
650 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
651 le32_to_cpu(fe->i_clusters),
652 (unsigned long long)le64_to_cpu(fe->i_size));
653 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
654 OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode));
658 ocfs2_commit_trans(osb, handle);
662 ocfs2_free_alloc_context(data_ac);
666 ocfs2_free_alloc_context(meta_ac);
669 if ((!status) && restart_func) {
680 /* Some parts of this taken from generic_cont_expand, which turned out
681 * to be too fragile to do exactly what we need without us having to
682 * worry about recursive locking in ->prepare_write() and
683 * ->commit_write(). */
684 static int ocfs2_write_zero_page(struct inode *inode,
687 struct address_space *mapping = inode->i_mapping;
691 handle_t *handle = NULL;
694 offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */
695 /* ugh. in prepare/commit_write, if from==to==start of block, we
696 ** skip the prepare. make sure we never send an offset for the start
699 if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) {
702 index = size >> PAGE_CACHE_SHIFT;
704 page = grab_cache_page(mapping, index);
711 ret = ocfs2_prepare_write_nolock(inode, page, offset, offset);
717 if (ocfs2_should_order_data(inode)) {
718 handle = ocfs2_start_walk_page_trans(inode, page, offset,
720 if (IS_ERR(handle)) {
721 ret = PTR_ERR(handle);
727 /* must not update i_size! */
728 ret = block_commit_write(page, offset, offset);
735 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
738 page_cache_release(page);
743 static int ocfs2_zero_extend(struct inode *inode,
748 struct super_block *sb = inode->i_sb;
750 start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
751 while (start_off < zero_to_size) {
752 ret = ocfs2_write_zero_page(inode, start_off);
758 start_off += sb->s_blocksize;
761 * Very large extends have the potential to lock up
762 * the cpu for extended periods of time.
771 int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to)
775 struct ocfs2_inode_info *oi = OCFS2_I(inode);
777 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
778 if (clusters_to_add < oi->ip_clusters)
781 clusters_to_add -= oi->ip_clusters;
783 if (clusters_to_add) {
784 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
793 * Call this even if we don't add any clusters to the tree. We
794 * still need to zero the area between the old i_size and the
797 ret = ocfs2_zero_extend(inode, zero_to);
805 static int ocfs2_extend_file(struct inode *inode,
806 struct buffer_head *di_bh,
810 struct ocfs2_inode_info *oi = OCFS2_I(inode);
814 /* setattr sometimes calls us like this. */
818 if (i_size_read(inode) == new_i_size)
820 BUG_ON(new_i_size < i_size_read(inode));
823 * Fall through for converting inline data, even if the fs
824 * supports sparse files.
826 * The check for inline data here is legal - nobody can add
827 * the feature since we have i_mutex. We must check it again
828 * after acquiring ip_alloc_sem though, as paths like mmap
829 * might have raced us to converting the inode to extents.
831 if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
832 && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
833 goto out_update_size;
836 * The alloc sem blocks people in read/write from reading our
837 * allocation until we're done changing it. We depend on
838 * i_mutex to block other extend/truncate calls while we're
841 down_write(&oi->ip_alloc_sem);
843 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
845 * We can optimize small extends by keeping the inodes
848 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
849 up_write(&oi->ip_alloc_sem);
850 goto out_update_size;
853 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
855 up_write(&oi->ip_alloc_sem);
862 if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
863 ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
865 up_write(&oi->ip_alloc_sem);
873 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
881 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
883 int status = 0, size_change;
884 struct inode *inode = dentry->d_inode;
885 struct super_block *sb = inode->i_sb;
886 struct ocfs2_super *osb = OCFS2_SB(sb);
887 struct buffer_head *bh = NULL;
888 handle_t *handle = NULL;
890 mlog_entry("(0x%p, '%.*s')\n", dentry,
891 dentry->d_name.len, dentry->d_name.name);
893 /* ensuring we don't even attempt to truncate a symlink */
894 if (S_ISLNK(inode->i_mode))
895 attr->ia_valid &= ~ATTR_SIZE;
897 if (attr->ia_valid & ATTR_MODE)
898 mlog(0, "mode change: %d\n", attr->ia_mode);
899 if (attr->ia_valid & ATTR_UID)
900 mlog(0, "uid change: %d\n", attr->ia_uid);
901 if (attr->ia_valid & ATTR_GID)
902 mlog(0, "gid change: %d\n", attr->ia_gid);
903 if (attr->ia_valid & ATTR_SIZE)
904 mlog(0, "size change...\n");
905 if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
906 mlog(0, "time change...\n");
908 #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
909 | ATTR_GID | ATTR_UID | ATTR_MODE)
910 if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
911 mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
915 status = inode_change_ok(inode, attr);
919 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
921 status = ocfs2_rw_lock(inode, 1);
928 status = ocfs2_inode_lock(inode, &bh, 1);
930 if (status != -ENOENT)
935 if (size_change && attr->ia_size != i_size_read(inode)) {
936 if (attr->ia_size > sb->s_maxbytes) {
941 if (i_size_read(inode) > attr->ia_size) {
942 if (ocfs2_should_order_data(inode)) {
943 status = ocfs2_begin_ordered_truncate(inode,
948 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
950 status = ocfs2_extend_file(inode, bh, attr->ia_size);
952 if (status != -ENOSPC)
959 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
960 if (IS_ERR(handle)) {
961 status = PTR_ERR(handle);
967 * This will intentionally not wind up calling vmtruncate(),
968 * since all the work for a size change has been done above.
969 * Otherwise, we could get into problems with truncate as
970 * ip_alloc_sem is used there to protect against i_size
973 status = inode_setattr(inode, attr);
979 status = ocfs2_mark_inode_dirty(handle, inode, bh);
984 ocfs2_commit_trans(osb, handle);
986 ocfs2_inode_unlock(inode, 1);
989 ocfs2_rw_unlock(inode, 1);
997 int ocfs2_getattr(struct vfsmount *mnt,
998 struct dentry *dentry,
1001 struct inode *inode = dentry->d_inode;
1002 struct super_block *sb = dentry->d_inode->i_sb;
1003 struct ocfs2_super *osb = sb->s_fs_info;
1008 err = ocfs2_inode_revalidate(dentry);
1015 generic_fillattr(inode, stat);
1017 /* We set the blksize from the cluster size for performance */
1018 stat->blksize = osb->s_clustersize;
1026 int ocfs2_permission(struct inode *inode, int mask)
1032 ret = ocfs2_inode_lock(inode, NULL, 0);
1039 ret = generic_permission(inode, mask, NULL);
1041 ocfs2_inode_unlock(inode, 0);
1047 static int __ocfs2_write_remove_suid(struct inode *inode,
1048 struct buffer_head *bh)
1052 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1053 struct ocfs2_dinode *di;
1055 mlog_entry("(Inode %llu, mode 0%o)\n",
1056 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
1058 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1059 if (handle == NULL) {
1065 ret = ocfs2_journal_access(handle, inode, bh,
1066 OCFS2_JOURNAL_ACCESS_WRITE);
1072 inode->i_mode &= ~S_ISUID;
1073 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1074 inode->i_mode &= ~S_ISGID;
1076 di = (struct ocfs2_dinode *) bh->b_data;
1077 di->i_mode = cpu_to_le16(inode->i_mode);
1079 ret = ocfs2_journal_dirty(handle, bh);
1084 ocfs2_commit_trans(osb, handle);
1091 * Will look for holes and unwritten extents in the range starting at
1092 * pos for count bytes (inclusive).
1094 static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
1098 unsigned int extent_flags;
1099 u32 cpos, clusters, extent_len, phys_cpos;
1100 struct super_block *sb = inode->i_sb;
1102 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
1103 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
1106 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
1113 if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
1118 if (extent_len > clusters)
1119 extent_len = clusters;
1121 clusters -= extent_len;
1128 static int ocfs2_write_remove_suid(struct inode *inode)
1131 struct buffer_head *bh = NULL;
1132 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1134 ret = ocfs2_read_block(inode, oi->ip_blkno, &bh);
1140 ret = __ocfs2_write_remove_suid(inode, bh);
1147 * Allocate enough extents to cover the region starting at byte offset
1148 * start for len bytes. Existing extents are skipped, any extents
1149 * added are marked as "unwritten".
1151 static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1155 u32 cpos, phys_cpos, clusters, alloc_size;
1156 u64 end = start + len;
1157 struct buffer_head *di_bh = NULL;
1159 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1160 ret = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno,
1168 * Nothing to do if the requested reservation range
1169 * fits within the inode.
1171 if (ocfs2_size_fits_inline_data(di_bh, end))
1174 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1182 * We consider both start and len to be inclusive.
1184 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1185 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1189 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1197 * Hole or existing extent len can be arbitrary, so
1198 * cap it to our own allocation request.
1200 if (alloc_size > clusters)
1201 alloc_size = clusters;
1205 * We already have an allocation at this
1206 * region so we can safely skip it.
1211 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1220 clusters -= alloc_size;
1230 static int __ocfs2_remove_inode_range(struct inode *inode,
1231 struct buffer_head *di_bh,
1232 u32 cpos, u32 phys_cpos, u32 len,
1233 struct ocfs2_cached_dealloc_ctxt *dealloc)
1236 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
1237 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1238 struct inode *tl_inode = osb->osb_tl_inode;
1240 struct ocfs2_alloc_context *meta_ac = NULL;
1241 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1242 struct ocfs2_extent_tree et;
1244 ocfs2_init_dinode_extent_tree(&et, inode, di_bh);
1246 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
1252 mutex_lock(&tl_inode->i_mutex);
1254 if (ocfs2_truncate_log_needs_flush(osb)) {
1255 ret = __ocfs2_flush_truncate_log(osb);
1262 handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
1263 if (handle == NULL) {
1269 ret = ocfs2_journal_access(handle, inode, di_bh,
1270 OCFS2_JOURNAL_ACCESS_WRITE);
1276 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
1283 OCFS2_I(inode)->ip_clusters -= len;
1284 di->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1286 ret = ocfs2_journal_dirty(handle, di_bh);
1292 ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len);
1297 ocfs2_commit_trans(osb, handle);
1299 mutex_unlock(&tl_inode->i_mutex);
1302 ocfs2_free_alloc_context(meta_ac);
1308 * Truncate a byte range, avoiding pages within partial clusters. This
1309 * preserves those pages for the zeroing code to write to.
1311 static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1314 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1316 struct address_space *mapping = inode->i_mapping;
1318 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1319 end = byte_start + byte_len;
1320 end = end & ~(osb->s_clustersize - 1);
1323 unmap_mapping_range(mapping, start, end - start, 0);
1324 truncate_inode_pages_range(mapping, start, end - 1);
1328 static int ocfs2_zero_partial_clusters(struct inode *inode,
1332 u64 tmpend, end = start + len;
1333 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1334 unsigned int csize = osb->s_clustersize;
1338 * The "start" and "end" values are NOT necessarily part of
1339 * the range whose allocation is being deleted. Rather, this
1340 * is what the user passed in with the request. We must zero
1341 * partial clusters here. There's no need to worry about
1342 * physical allocation - the zeroing code knows to skip holes.
1344 mlog(0, "byte start: %llu, end: %llu\n",
1345 (unsigned long long)start, (unsigned long long)end);
1348 * If both edges are on a cluster boundary then there's no
1349 * zeroing required as the region is part of the allocation to
1352 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1355 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1356 if (handle == NULL) {
1363 * We want to get the byte offset of the end of the 1st cluster.
1365 tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
1369 mlog(0, "1st range: start: %llu, tmpend: %llu\n",
1370 (unsigned long long)start, (unsigned long long)tmpend);
1372 ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
1378 * This may make start and end equal, but the zeroing
1379 * code will skip any work in that case so there's no
1380 * need to catch it up here.
1382 start = end & ~(osb->s_clustersize - 1);
1384 mlog(0, "2nd range: start: %llu, end: %llu\n",
1385 (unsigned long long)start, (unsigned long long)end);
1387 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1392 ocfs2_commit_trans(osb, handle);
1397 static int ocfs2_remove_inode_range(struct inode *inode,
1398 struct buffer_head *di_bh, u64 byte_start,
1402 u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
1403 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1404 struct ocfs2_cached_dealloc_ctxt dealloc;
1405 struct address_space *mapping = inode->i_mapping;
1407 ocfs2_init_dealloc_ctxt(&dealloc);
1412 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1413 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
1414 byte_start + byte_len, 0);
1420 * There's no need to get fancy with the page cache
1421 * truncate of an inline-data inode. We're talking
1422 * about less than a page here, which will be cached
1423 * in the dinode buffer anyway.
1425 unmap_mapping_range(mapping, 0, 0, 0);
1426 truncate_inode_pages(mapping, 0);
1430 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
1431 trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
1432 if (trunc_len >= trunc_start)
1433 trunc_len -= trunc_start;
1437 mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
1438 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1439 (unsigned long long)byte_start,
1440 (unsigned long long)byte_len, trunc_start, trunc_len);
1442 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1450 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1457 if (alloc_size > trunc_len)
1458 alloc_size = trunc_len;
1460 /* Only do work for non-holes */
1461 if (phys_cpos != 0) {
1462 ret = __ocfs2_remove_inode_range(inode, di_bh, cpos,
1463 phys_cpos, alloc_size,
1472 trunc_len -= alloc_size;
1475 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1478 ocfs2_schedule_truncate_log_flush(osb, 1);
1479 ocfs2_run_deallocs(osb, &dealloc);
1485 * Parts of this function taken from xfs_change_file_space()
1487 static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1488 loff_t f_pos, unsigned int cmd,
1489 struct ocfs2_space_resv *sr,
1495 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1496 struct buffer_head *di_bh = NULL;
1498 unsigned long long max_off = inode->i_sb->s_maxbytes;
1500 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1503 mutex_lock(&inode->i_mutex);
1506 * This prevents concurrent writes on other nodes
1508 ret = ocfs2_rw_lock(inode, 1);
1514 ret = ocfs2_inode_lock(inode, &di_bh, 1);
1520 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1522 goto out_inode_unlock;
1525 switch (sr->l_whence) {
1526 case 0: /*SEEK_SET*/
1528 case 1: /*SEEK_CUR*/
1529 sr->l_start += f_pos;
1531 case 2: /*SEEK_END*/
1532 sr->l_start += i_size_read(inode);
1536 goto out_inode_unlock;
1540 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1543 || sr->l_start > max_off
1544 || (sr->l_start + llen) < 0
1545 || (sr->l_start + llen) > max_off) {
1547 goto out_inode_unlock;
1549 size = sr->l_start + sr->l_len;
1551 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1552 if (sr->l_len <= 0) {
1554 goto out_inode_unlock;
1558 if (file && should_remove_suid(file->f_path.dentry)) {
1559 ret = __ocfs2_write_remove_suid(inode, di_bh);
1562 goto out_inode_unlock;
1566 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1568 case OCFS2_IOC_RESVSP:
1569 case OCFS2_IOC_RESVSP64:
1571 * This takes unsigned offsets, but the signed ones we
1572 * pass have been checked against overflow above.
1574 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1577 case OCFS2_IOC_UNRESVSP:
1578 case OCFS2_IOC_UNRESVSP64:
1579 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1585 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1588 goto out_inode_unlock;
1592 * We update c/mtime for these changes
1594 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1595 if (IS_ERR(handle)) {
1596 ret = PTR_ERR(handle);
1598 goto out_inode_unlock;
1601 if (change_size && i_size_read(inode) < size)
1602 i_size_write(inode, size);
1604 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1605 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1609 ocfs2_commit_trans(osb, handle);
1613 ocfs2_inode_unlock(inode, 1);
1615 ocfs2_rw_unlock(inode, 1);
1618 mutex_unlock(&inode->i_mutex);
1622 int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1623 struct ocfs2_space_resv *sr)
1625 struct inode *inode = file->f_path.dentry->d_inode;
1626 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);;
1628 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1629 !ocfs2_writes_unwritten_extents(osb))
1631 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1632 !ocfs2_sparse_alloc(osb))
1635 if (!S_ISREG(inode->i_mode))
1638 if (!(file->f_mode & FMODE_WRITE))
1641 return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
1644 static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
1647 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1648 struct ocfs2_space_resv sr;
1649 int change_size = 1;
1651 if (!ocfs2_writes_unwritten_extents(osb))
1654 if (S_ISDIR(inode->i_mode))
1657 if (mode & FALLOC_FL_KEEP_SIZE)
1661 sr.l_start = (s64)offset;
1662 sr.l_len = (s64)len;
1664 return __ocfs2_change_file_space(NULL, inode, offset,
1665 OCFS2_IOC_RESVSP64, &sr, change_size);
1668 static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
1674 int ret = 0, meta_level = 0;
1675 struct inode *inode = dentry->d_inode;
1676 loff_t saved_pos, end;
1679 * We start with a read level meta lock and only jump to an ex
1680 * if we need to make modifications here.
1683 ret = ocfs2_inode_lock(inode, NULL, meta_level);
1690 /* Clear suid / sgid if necessary. We do this here
1691 * instead of later in the write path because
1692 * remove_suid() calls ->setattr without any hint that
1693 * we may have already done our cluster locking. Since
1694 * ocfs2_setattr() *must* take cluster locks to
1695 * proceeed, this will lead us to recursively lock the
1696 * inode. There's also the dinode i_size state which
1697 * can be lost via setattr during extending writes (we
1698 * set inode->i_size at the end of a write. */
1699 if (should_remove_suid(dentry)) {
1700 if (meta_level == 0) {
1701 ocfs2_inode_unlock(inode, meta_level);
1706 ret = ocfs2_write_remove_suid(inode);
1713 /* work on a copy of ppos until we're sure that we won't have
1714 * to recalculate it due to relocking. */
1716 saved_pos = i_size_read(inode);
1717 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
1722 end = saved_pos + count;
1725 * Skip the O_DIRECT checks if we don't need
1728 if (!direct_io || !(*direct_io))
1732 * There's no sane way to do direct writes to an inode
1735 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1741 * Allowing concurrent direct writes means
1742 * i_size changes wouldn't be synchronized, so
1743 * one node could wind up truncating another
1746 if (end > i_size_read(inode)) {
1752 * We don't fill holes during direct io, so
1753 * check for them here. If any are found, the
1754 * caller will have to retake some cluster
1755 * locks and initiate the io as buffered.
1757 ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
1770 ocfs2_inode_unlock(inode, meta_level);
1776 static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
1777 const struct iovec *iov,
1778 unsigned long nr_segs,
1781 int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
1783 ssize_t written = 0;
1784 size_t ocount; /* original count */
1785 size_t count; /* after file limit checks */
1786 loff_t old_size, *ppos = &iocb->ki_pos;
1788 struct file *file = iocb->ki_filp;
1789 struct inode *inode = file->f_path.dentry->d_inode;
1790 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1792 mlog_entry("(0x%p, %u, '%.*s')\n", file,
1793 (unsigned int)nr_segs,
1794 file->f_path.dentry->d_name.len,
1795 file->f_path.dentry->d_name.name);
1797 if (iocb->ki_left == 0)
1800 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
1802 appending = file->f_flags & O_APPEND ? 1 : 0;
1803 direct_io = file->f_flags & O_DIRECT ? 1 : 0;
1805 mutex_lock(&inode->i_mutex);
1808 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
1810 down_read(&inode->i_alloc_sem);
1814 /* concurrent O_DIRECT writes are allowed */
1815 rw_level = !direct_io;
1816 ret = ocfs2_rw_lock(inode, rw_level);
1822 can_do_direct = direct_io;
1823 ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos,
1824 iocb->ki_left, appending,
1832 * We can't complete the direct I/O as requested, fall back to
1835 if (direct_io && !can_do_direct) {
1836 ocfs2_rw_unlock(inode, rw_level);
1837 up_read(&inode->i_alloc_sem);
1847 * To later detect whether a journal commit for sync writes is
1848 * necessary, we sample i_size, and cluster count here.
1850 old_size = i_size_read(inode);
1851 old_clusters = OCFS2_I(inode)->ip_clusters;
1853 /* communicate with ocfs2_dio_end_io */
1854 ocfs2_iocb_set_rw_locked(iocb, rw_level);
1857 ret = generic_segment_checks(iov, &nr_segs, &ocount,
1862 ret = generic_write_checks(file, ppos, &count,
1863 S_ISBLK(inode->i_mode));
1867 written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
1868 ppos, count, ocount);
1874 written = generic_file_aio_write_nolock(iocb, iov, nr_segs,
1879 /* buffered aio wouldn't have proper lock coverage today */
1880 BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
1882 if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
1884 * The generic write paths have handled getting data
1885 * to disk, but since we don't make use of the dirty
1886 * inode list, a manual journal commit is necessary
1889 if (old_size != i_size_read(inode) ||
1890 old_clusters != OCFS2_I(inode)->ip_clusters) {
1891 ret = jbd2_journal_force_commit(osb->journal->j_journal);
1898 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
1899 * function pointer which is called when o_direct io completes so that
1900 * it can unlock our rw lock. (it's the clustered equivalent of
1901 * i_alloc_sem; protects truncate from racing with pending ios).
1902 * Unfortunately there are error cases which call end_io and others
1903 * that don't. so we don't have to unlock the rw_lock if either an
1904 * async dio is going to do it in the future or an end_io after an
1905 * error has already done it.
1907 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
1914 ocfs2_rw_unlock(inode, rw_level);
1918 up_read(&inode->i_alloc_sem);
1920 mutex_unlock(&inode->i_mutex);
1923 return written ? written : ret;
1926 static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
1933 struct inode *inode = out->f_path.dentry->d_inode;
1935 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe,
1937 out->f_path.dentry->d_name.len,
1938 out->f_path.dentry->d_name.name);
1940 inode_double_lock(inode, pipe->inode);
1942 ret = ocfs2_rw_lock(inode, 1);
1948 ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0,
1955 ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags);
1958 ocfs2_rw_unlock(inode, 1);
1960 inode_double_unlock(inode, pipe->inode);
1966 static ssize_t ocfs2_file_splice_read(struct file *in,
1968 struct pipe_inode_info *pipe,
1973 struct inode *inode = in->f_path.dentry->d_inode;
1975 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe,
1977 in->f_path.dentry->d_name.len,
1978 in->f_path.dentry->d_name.name);
1981 * See the comment in ocfs2_file_aio_read()
1983 ret = ocfs2_inode_lock(inode, NULL, 0);
1988 ocfs2_inode_unlock(inode, 0);
1990 ret = generic_file_splice_read(in, ppos, pipe, len, flags);
1997 static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
1998 const struct iovec *iov,
1999 unsigned long nr_segs,
2002 int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
2003 struct file *filp = iocb->ki_filp;
2004 struct inode *inode = filp->f_path.dentry->d_inode;
2006 mlog_entry("(0x%p, %u, '%.*s')\n", filp,
2007 (unsigned int)nr_segs,
2008 filp->f_path.dentry->d_name.len,
2009 filp->f_path.dentry->d_name.name);
2018 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2019 * need locks to protect pending reads from racing with truncate.
2021 if (filp->f_flags & O_DIRECT) {
2022 down_read(&inode->i_alloc_sem);
2025 ret = ocfs2_rw_lock(inode, 0);
2031 /* communicate with ocfs2_dio_end_io */
2032 ocfs2_iocb_set_rw_locked(iocb, rw_level);
2036 * We're fine letting folks race truncates and extending
2037 * writes with read across the cluster, just like they can
2038 * locally. Hence no rw_lock during read.
2040 * Take and drop the meta data lock to update inode fields
2041 * like i_size. This allows the checks down below
2042 * generic_file_aio_read() a chance of actually working.
2044 ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
2049 ocfs2_inode_unlock(inode, lock_level);
2051 ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
2053 mlog(0, "generic_file_aio_read returned -EINVAL\n");
2055 /* buffered aio wouldn't have proper lock coverage today */
2056 BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
2058 /* see ocfs2_file_aio_write */
2059 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2066 up_read(&inode->i_alloc_sem);
2068 ocfs2_rw_unlock(inode, rw_level);
2074 const struct inode_operations ocfs2_file_iops = {
2075 .setattr = ocfs2_setattr,
2076 .getattr = ocfs2_getattr,
2077 .permission = ocfs2_permission,
2078 .setxattr = generic_setxattr,
2079 .getxattr = generic_getxattr,
2080 .listxattr = ocfs2_listxattr,
2081 .removexattr = generic_removexattr,
2082 .fallocate = ocfs2_fallocate,
2083 .fiemap = ocfs2_fiemap,
2086 const struct inode_operations ocfs2_special_file_iops = {
2087 .setattr = ocfs2_setattr,
2088 .getattr = ocfs2_getattr,
2089 .permission = ocfs2_permission,
2093 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2094 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2096 const struct file_operations ocfs2_fops = {
2097 .llseek = generic_file_llseek,
2098 .read = do_sync_read,
2099 .write = do_sync_write,
2101 .fsync = ocfs2_sync_file,
2102 .release = ocfs2_file_release,
2103 .open = ocfs2_file_open,
2104 .aio_read = ocfs2_file_aio_read,
2105 .aio_write = ocfs2_file_aio_write,
2106 .unlocked_ioctl = ocfs2_ioctl,
2107 #ifdef CONFIG_COMPAT
2108 .compat_ioctl = ocfs2_compat_ioctl,
2111 .flock = ocfs2_flock,
2112 .splice_read = ocfs2_file_splice_read,
2113 .splice_write = ocfs2_file_splice_write,
2116 const struct file_operations ocfs2_dops = {
2117 .llseek = generic_file_llseek,
2118 .read = generic_read_dir,
2119 .readdir = ocfs2_readdir,
2120 .fsync = ocfs2_sync_file,
2121 .release = ocfs2_dir_release,
2122 .open = ocfs2_dir_open,
2123 .unlocked_ioctl = ocfs2_ioctl,
2124 #ifdef CONFIG_COMPAT
2125 .compat_ioctl = ocfs2_compat_ioctl,
2128 .flock = ocfs2_flock,
2132 * POSIX-lockless variants of our file_operations.
2134 * These will be used if the underlying cluster stack does not support
2135 * posix file locking, if the user passes the "localflocks" mount
2136 * option, or if we have a local-only fs.
2138 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2139 * so we still want it in the case of no stack support for
2140 * plocks. Internally, it will do the right thing when asked to ignore
2143 const struct file_operations ocfs2_fops_no_plocks = {
2144 .llseek = generic_file_llseek,
2145 .read = do_sync_read,
2146 .write = do_sync_write,
2148 .fsync = ocfs2_sync_file,
2149 .release = ocfs2_file_release,
2150 .open = ocfs2_file_open,
2151 .aio_read = ocfs2_file_aio_read,
2152 .aio_write = ocfs2_file_aio_write,
2153 .unlocked_ioctl = ocfs2_ioctl,
2154 #ifdef CONFIG_COMPAT
2155 .compat_ioctl = ocfs2_compat_ioctl,
2157 .flock = ocfs2_flock,
2158 .splice_read = ocfs2_file_splice_read,
2159 .splice_write = ocfs2_file_splice_write,
2162 const struct file_operations ocfs2_dops_no_plocks = {
2163 .llseek = generic_file_llseek,
2164 .read = generic_read_dir,
2165 .readdir = ocfs2_readdir,
2166 .fsync = ocfs2_sync_file,
2167 .release = ocfs2_dir_release,
2168 .open = ocfs2_dir_open,
2169 .unlocked_ioctl = ocfs2_ioctl,
2170 #ifdef CONFIG_COMPAT
2171 .compat_ioctl = ocfs2_compat_ioctl,
2173 .flock = ocfs2_flock,