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authorLi Dongyang <lidongyang@novell.com>2010-04-17 17:49:10 +0800
committerJoel Becker <joel.becker@oracle.com>2010-04-30 13:45:13 -0700
commit6b933c8e6f1a2f3118082c455eef25f9b1ac7b45 (patch)
treebf31f4067a95aa23a354edfa89810c9eaaf71aaa /fs/ocfs2/file.c
parentf9221fd80343285514568da6c5dbda0f87109de8 (diff)
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ocfs2: Avoid direct write if we fall back to buffered I/O
when we fall back to buffered write from direct write, we call __generic_file_aio_write() but that will end up doing direct write even we are only prepared to do buffered write because the file has the O_DIRECT flag set. This is a fix for https://bugzilla.novell.com/show_bug.cgi?id=591039 revised with Joel's comments. Signed-off-by: Li Dongyang <lidongyang@novell.com> Acked-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/file.c')
-rw-r--r--fs/ocfs2/file.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 20e0ee58dd3..a5fbd9cea96 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1982,18 +1982,18 @@ relock:
/* communicate with ocfs2_dio_end_io */
ocfs2_iocb_set_rw_locked(iocb, rw_level);
- if (direct_io) {
- ret = generic_segment_checks(iov, &nr_segs, &ocount,
- VERIFY_READ);
- if (ret)
- goto out_dio;
+ ret = generic_segment_checks(iov, &nr_segs, &ocount,
+ VERIFY_READ);
+ if (ret)
+ goto out_dio;
- count = ocount;
- ret = generic_write_checks(file, ppos, &count,
- S_ISBLK(inode->i_mode));
- if (ret)
- goto out_dio;
+ count = ocount;
+ ret = generic_write_checks(file, ppos, &count,
+ S_ISBLK(inode->i_mode));
+ if (ret)
+ goto out_dio;
+ if (direct_io) {
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
ppos, count, ocount);
if (written < 0) {
@@ -2008,7 +2008,10 @@ relock:
goto out_dio;
}
} else {
- written = __generic_file_aio_write(iocb, iov, nr_segs, ppos);
+ current->backing_dev_info = file->f_mapping->backing_dev_info;
+ written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos,
+ ppos, count, 0);
+ current->backing_dev_info = NULL;
}
out_dio: