1 files changed, 7 insertions, 1 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 07d321552dbe..34ed23d64eb5 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -592,6 +592,10 @@ struct btrfs_fs_info {
         u64 last_alloc;
         u64 last_data_alloc;
 
+        spinlock_t ref_cache_lock;
+        u64 total_ref_cache_size;
+        u64 running_ref_cache_size;
+
         u64 avail_data_alloc_bits;
         u64 avail_metadata_alloc_bits;
         u64 avail_system_alloc_bits;
@@ -613,6 +617,8 @@ struct btrfs_root {
         spinlock_t node_lock;
 
         struct extent_buffer *commit_root;
+        struct btrfs_leaf_ref_tree *ref_tree;
+
         struct btrfs_root_item root_item;
         struct btrfs_key root_key;
         struct btrfs_fs_info *fs_info;
@@ -1430,7 +1436,7 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
                                   u64 search_end, struct btrfs_key *ins,
                                   u64 data);
 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                  struct extent_buffer *buf);
+                  struct extent_buffer *buf, int cache_ref);
 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
                       *root, u64 bytenr, u64 num_bytes,
                       u64 root_objectid, u64 ref_generation,