Btrfs: Leaf reference cache update

[mirror_ubuntu-artful-kernel.git] / fs / btrfs / ref-cache.h

diff --git a/fs/btrfs/ref-cache.h b/fs/btrfs/ref-cache.h
index 79ecc47110f2b95ac2bec30f7f84bcd7e00677bf..823c049f72f184ca8d1269c4963f1d2e90467e3f 100644 (file)
--- a/fs/btrfs/ref-cache.h
+++ b/fs/btrfs/ref-cache.h
@@ -15,6 +15,8 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 021110-1307, USA.
  */
+#ifndef __REFCACHE__
+#define __REFCACHE__
 
 struct btrfs_extent_info {
        u64 bytenr;
@@ -25,7 +27,6 @@ struct btrfs_extent_info {
 
 struct btrfs_leaf_ref {
        struct rb_node rb_node;
-       struct btrfs_key key;
        int in_tree;
        atomic_t usage;
 
@@ -33,14 +34,9 @@ struct btrfs_leaf_ref {
        u64 owner;
        u64 generation;
        int nritems;
-       struct btrfs_extent_info extents[];
-};
 
-struct btrfs_leaf_ref_tree {
-       struct rb_root root;
-       struct btrfs_leaf_ref *last;
-       u64 generation;
-       spinlock_t lock;
+       struct list_head list;
+       struct btrfs_extent_info extents[];
 };
 
 static inline size_t btrfs_leaf_ref_size(int nr_extents)
@@ -53,7 +49,7 @@ static inline void btrfs_leaf_ref_tree_init(struct btrfs_leaf_ref_tree *tree)
 {
        tree->root.rb_node = NULL;
        tree->last = NULL;
-       tree->generation = 0;
+       INIT_LIST_HEAD(&tree->list);
        spin_lock_init(&tree->lock);
 }
 
@@ -66,7 +62,9 @@ void btrfs_leaf_ref_tree_init(struct btrfs_leaf_ref_tree *tree);
 struct btrfs_leaf_ref *btrfs_alloc_leaf_ref(int nr_extents);
 void btrfs_free_leaf_ref(struct btrfs_leaf_ref *ref);
 struct btrfs_leaf_ref *btrfs_lookup_leaf_ref(struct btrfs_root *root,
-                                            struct btrfs_key *key);
+                                            u64 bytenr);
 int btrfs_add_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);
 int btrfs_remove_leaf_refs(struct btrfs_root *root);
 int btrfs_remove_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);
+
+#endif