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/fs/btrfs/super.c b/fs/btrfs/super.c
index 6567865..e84e6cb 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -325,6 +325,7 @@
Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow,
+ Opt_datasum,
Opt_err,
};
@@ -334,6 +335,7 @@
{Opt_subvolid, "subvolid=%s"},
{Opt_device, "device=%s"},
{Opt_nodatasum, "nodatasum"},
+ {Opt_datasum, "datasum"},
{Opt_nodatacow, "nodatacow"},
{Opt_datacow, "datacow"},
{Opt_nobarrier, "nobarrier"},
@@ -434,6 +436,14 @@
btrfs_info(root->fs_info, "setting nodatasum");
btrfs_set_opt(info->mount_opt, NODATASUM);
break;
+ case Opt_datasum:
+ if (btrfs_test_opt(root, NODATACOW))
+ btrfs_info(root->fs_info, "setting datasum, datacow enabled");
+ else
+ btrfs_info(root->fs_info, "setting datasum");
+ btrfs_clear_opt(info->mount_opt, NODATACOW);
+ btrfs_clear_opt(info->mount_opt, NODATASUM);
+ break;
case Opt_nodatacow:
if (!btrfs_test_opt(root, COMPRESS) ||
!btrfs_test_opt(root, FORCE_COMPRESS)) {