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>
/* communicate with ocfs2_dio_end_io */
ocfs2_iocb_set_rw_locked(iocb, rw_level);
/* 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;
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
ppos, count, ocount);
if (written < 0) {
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
ppos, count, ocount);
if (written < 0) {
- 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;