btrfs: Add datacow mount option.
authorQu Wenruo <quwenruo@cn.fujitsu.com>
Mon, 6 Jan 2014 01:58:31 +0000 (09:58 +0800)
committerChris Mason <clm@fb.com>
Tue, 28 Jan 2014 21:20:19 +0000 (13:20 -0800)
commita258af7a3e395a1d36190c81614dca0bcb5f6012
treebd04146ab46bd470efbc4728cd0e9c4b7b472157
parentbd0330ad2174d1a5f762eee2ee58f0148f10d575
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>
Documentation/filesystems/btrfs.txt
fs/btrfs/super.c