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| author | Li Dongyang <lidongyang@novell.com> | 2010-04-17 17:49:10 +0800 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2010-04-30 13:45:13 -0700 |
| commit | 6b933c8e6f1a2f3118082c455eef25f9b1ac7b45 (patch) | |
| tree | bf31f4067a95aa23a354edfa89810c9eaaf71aaa /fs/ocfs2 | |
| parent | f9221fd80343285514568da6c5dbda0f87109de8 (diff) | |
| download | linux-6b933c8e6f1a2f3118082c455eef25f9b1ac7b45.tar.gz linux-6b933c8e6f1a2f3118082c455eef25f9b1ac7b45.tar.bz2 linux-6b933c8e6f1a2f3118082c455eef25f9b1ac7b45.zip | |
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')
| -rw-r--r-- | fs/ocfs2/file.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 20e0ee58dd39..a5fbd9cea968 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: |