Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[cascardo/linux.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index e720d3e..3a57f99 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2586,6 +2586,7 @@ int open_ctree(struct super_block *sb,
        int num_backups_tried = 0;
        int backup_index = 0;
        int max_active;
+       int clear_free_space_tree = 0;
 
        tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
        chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
@@ -3148,6 +3149,26 @@ retry_root_backup:
        if (sb->s_flags & MS_RDONLY)
                return 0;
 
+       if (btrfs_test_opt(fs_info, CLEAR_CACHE) &&
+           btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
+               clear_free_space_tree = 1;
+       } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) &&
+                  !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) {
+               btrfs_warn(fs_info, "free space tree is invalid");
+               clear_free_space_tree = 1;
+       }
+
+       if (clear_free_space_tree) {
+               btrfs_info(fs_info, "clearing free space tree");
+               ret = btrfs_clear_free_space_tree(fs_info);
+               if (ret) {
+                       btrfs_warn(fs_info,
+                                  "failed to clear free space tree: %d", ret);
+                       close_ctree(tree_root);
+                       return ret;
+               }
+       }
+
        if (btrfs_test_opt(tree_root->fs_info, FREE_SPACE_TREE) &&
            !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
                btrfs_info(fs_info, "creating free space tree");
@@ -3185,18 +3206,6 @@ retry_root_backup:
 
        btrfs_qgroup_rescan_resume(fs_info);
 
-       if (btrfs_test_opt(tree_root->fs_info, CLEAR_CACHE) &&
-           btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) {
-               btrfs_info(fs_info, "clearing free space tree");
-               ret = btrfs_clear_free_space_tree(fs_info);
-               if (ret) {
-                       btrfs_warn(fs_info,
-                               "failed to clear free space tree: %d", ret);
-                       close_ctree(tree_root);
-                       return ret;
-               }
-       }
-
        if (!fs_info->uuid_root) {
                btrfs_info(fs_info, "creating UUID tree");
                ret = btrfs_create_uuid_tree(fs_info);