Btrfs: fix OOPS of empty filesystem after balance

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / extent-tree.c

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a561060f5ffb958667d02748220c1d3b7c946b67..f619c3cb13b7006cc7f95e273996917bbcebcf67 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8778,6 +8778,29 @@ out:
        return ret;
 }
 
+int btrfs_init_space_info(struct btrfs_fs_info *fs_info)
+{
+       struct btrfs_space_info *space_info;
+       int ret;
+
+       ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_SYSTEM, 0, 0,
+                                                                &space_info);
+       if (ret)
+               return ret;
+
+       ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA, 0, 0,
+                                                                &space_info);
+       if (ret)
+               return ret;
+
+       ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_DATA, 0, 0,
+                                                                &space_info);
+       if (ret)
+               return ret;
+
+       return ret;
+}
+
 int btrfs_error_unpin_extent_range(struct btrfs_root *root, u64 start, u64 end)
 {
        return unpin_extent_range(root, start, end);