The patch titled
Subject: ocfs2: fix several issues of append dio
has been added to the -mm tree. Its filename is
ocfs2-fix-several-issues-of-append-dio.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-fix-several-issues-of-append-dio.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-fix-several-issues-of-append-dio.patch
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------------------------------------------------------
From: Joseph Qi <joseph.qi@xxxxxxxxxx>
Subject: ocfs2: fix several issues of append dio
1) Take rw EX lock in case of append dio.
2) Explicitly treat the error code -EIOCBQUEUED as normal.
3) Set di_bh to NULL after brelse if it may be used again later.
Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxx>
Cc: Yiwen Jiang <jiangyiwen@xxxxxxxxxx>
Cc: Weiwei Wang <wangww631@xxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/aops.c | 7 ++++++-
fs/ocfs2/file.c | 5 ++++-
2 files changed, 10 insertions(+), 2 deletions(-)
diff -puN fs/ocfs2/aops.c~ocfs2-fix-several-issues-of-append-dio fs/ocfs2/aops.c
--- a/fs/ocfs2/aops.c~ocfs2-fix-several-issues-of-append-dio
+++ a/fs/ocfs2/aops.c
@@ -860,7 +860,8 @@ static ssize_t ocfs2_direct_IO_write(str
written = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, iter,
offset, ocfs2_direct_IO_get_blocks,
ocfs2_dio_end_io, NULL, 0);
- if (unlikely(written < 0)) {
+ /* overwrite aio may return -EIOCBQUEUED, and it is not an error */
+ if ((written < 0) && (written != -EIOCBQUEUED)) {
loff_t i_size = i_size_read(inode);
if (offset + count > i_size) {
@@ -879,12 +880,14 @@ static ssize_t ocfs2_direct_IO_write(str
ocfs2_inode_unlock(inode, 1);
brelse(di_bh);
+ di_bh = NULL;
goto clean_orphan;
}
}
ocfs2_inode_unlock(inode, 1);
brelse(di_bh);
+ di_bh = NULL;
ret = jbd2_journal_force_commit(journal);
if (ret < 0)
@@ -939,10 +942,12 @@ clean_orphan:
if (tmp_ret < 0) {
ret = tmp_ret;
mlog_errno(ret);
+ brelse(di_bh);
goto out;
}
ocfs2_inode_unlock(inode, 1);
+ brelse(di_bh);
tmp_ret = jbd2_journal_force_commit(journal);
if (tmp_ret < 0) {
diff -puN fs/ocfs2/file.c~ocfs2-fix-several-issues-of-append-dio fs/ocfs2/file.c
--- a/fs/ocfs2/file.c~ocfs2-fix-several-issues-of-append-dio
+++ a/fs/ocfs2/file.c
@@ -2265,6 +2265,8 @@ static ssize_t ocfs2_file_write_iter(str
OCFS2_MOUNT_COHERENCY_BUFFERED);
int unaligned_dio = 0;
int dropped_dio = 0;
+ int append_write = ((iocb->ki_pos + count) >=
+ i_size_read(inode) ? 1 : 0);
trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
(unsigned long long)OCFS2_I(inode)->ip_blkno,
@@ -2284,8 +2286,9 @@ relock:
/*
* Concurrent O_DIRECT writes are allowed with
* mount_option "coherency=buffered".
+ * For append write, we must take rw EX.
*/
- rw_level = (!direct_io || full_coherency);
+ rw_level = (!direct_io || full_coherency || append_write);
ret = ocfs2_rw_lock(inode, rw_level);
if (ret < 0) {
_
Patches currently in -mm which might be from joseph.qi@xxxxxxxxxx are
ocfs2-fix-bug-in-ocfs2_downconvert_thread_do_work.patch
ocfs2-fix-bug-in-ocfs2_downconvert_thread_do_work-v2.patch
ocfs2-fix-race-between-dio-and-recover-orphan.patch
ocfs2-fix-several-issues-of-append-dio.patch
ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed.patch
ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed-v2.patch
ocfs2-fix-race-between-crashed-dio-and-rm.patch
ocfs2-avoid-access-invalid-address-when-read-o2dlm-debug-messages.patch
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