btrfs: Add datasum mount option.
Add datasum mount option to enable checksum 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>
diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt
index bbd1f0f..e05c6ae 100644
--- a/Documentation/filesystems/btrfs.txt
+++ b/Documentation/filesystems/btrfs.txt
@@ -159,8 +159,10 @@
Enable/disable data copy-on-write for newly created files.
Nodatacow implies nodatasum, and disables all compression.
+ datasum(*)
nodatasum
- Disable data checksumming for newly created files.
+ Enable/disable data checksumming for newly created files.
+ Datasum implies datacow.
notreelog
Disable the tree logging used for fsync and O_SYNC writes.