1 files changed, 10 insertions, 0 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6567865a2504..e84e6cb57526 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -325,6 +325,7 @@ enum {
         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 @@ static match_table_t tokens = {
         {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 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
                         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)) {