1 files changed, 6 insertions, 1 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index cd0c7cd2c8fb..28e3cb2607ff 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -160,7 +160,7 @@ enum {
         Opt_compress_type, Opt_compress_force, Opt_compress_force_type,
         Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard,
         Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed,
-        Opt_enospc_debug, Opt_subvolrootid, Opt_err,
+        Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_err,
 };
 
 static match_table_t tokens = {
@@ -191,6 +191,7 @@ static match_table_t tokens = {
         {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"},
         {Opt_enospc_debug, "enospc_debug"},
         {Opt_subvolrootid, "subvolrootid=%d"},
+        {Opt_defrag, "autodefrag"},
         {Opt_err, NULL},
 };
 
@@ -369,6 +370,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
                 case Opt_enospc_debug:
                         btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG);
                         break;
+                case Opt_defrag:
+                        printk(KERN_INFO "btrfs: enabling auto defrag");
+                        btrfs_set_opt(info->mount_opt, AUTO_DEFRAG);
+                        break;
                 case Opt_err:
                         printk(KERN_INFO "btrfs: unrecognized mount option "
                                "'%s'\n", p);