Btrfs: add mount -o auto_defrag

[linux-2.6-block.git] / fs / btrfs / super.c

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index cd0c7cd2c8fb775533e97e3d3158f2fe6b98f5e5..28e3cb2607ff4155589d17ff7575768a2c84e467 100644 (file)
--- 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);