tree bd04146ab46bd470efbc4728cd0e9c4b7b472157
parent bd0330ad2174d1a5f762eee2ee58f0148f10d575
author Qu Wenruo <quwenruo@cn.fujitsu.com> 1388973511 +0800
committer Chris Mason <clm@fb.com> 1390944019 -0800

btrfs: Add datacow mount option.

Add datacow mount option to enable copy-on-write with
remount option.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>