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authorJan Kara <jack@suse.cz>2010-08-05 20:32:45 +0200
committerTao Ma <tao.ma@oracle.com>2010-09-08 14:25:55 +0800
commit04eda1a18019bb387dc7e97ee99979dd88dc608a (patch)
tree8162ad0ec77c7ef80903a1fec134b43b71a7d272 /fs
parentf63afdb2c32db850fa1bfccf84643a8885cbeb61 (diff)
ocfs2: Flush drive's caches on fdatasync
When 'barrier' mount option is specified, we have to issue a cache flush during fdatasync(2). We have to do this even if inode doesn't have I_DIRTY_DATASYNC set because we still have to get written *data* to disk so that they are not lost in case of crash. Acked-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz> Singed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/ocfs2/file.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 81296b4e3646..6b2be0f2eacd 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -36,6 +36,7 @@
#include <linux/writeback.h>
#include <linux/falloc.h>
#include <linux/quotaops.h>
+#include <linux/blkdev.h>
#define MLOG_MASK_PREFIX ML_INODE
#include <cluster/masklog.h>
@@ -190,8 +191,16 @@ static int ocfs2_sync_file(struct file *file, int datasync)
if (err)
goto bail;
- if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+ if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) {
+ /*
+ * We still have to flush drive's caches to get data to the
+ * platter
+ */
+ if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
+ blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL,
+ NULL, BLKDEV_IFL_WAIT);
goto bail;
+ }
journal = osb->journal->j_journal;
err = jbd2_journal_force_commit(journal);