Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight

[linux-2.6-omap-h63xx.git] / fs / btrfs / ref-cache.h

diff --git a/fs/btrfs/ref-cache.h b/fs/btrfs/ref-cache.h
index c361b321c0c32289b2557c395354587c6f7656ef..16f3183d7c59058909707d72ad16315d091bc098 100644 (file)
--- a/fs/btrfs/ref-cache.h
+++ b/fs/btrfs/ref-cache.h
@@ -19,14 +19,18 @@
 #define __REFCACHE__
 
 struct btrfs_extent_info {
+       /* bytenr and num_bytes find the extent in the extent allocation tree */
        u64 bytenr;
        u64 num_bytes;
+
+       /* objectid and offset find the back reference for the file */
        u64 objectid;
        u64 offset;
 };
 
 struct btrfs_leaf_ref {
        struct rb_node rb_node;
+       struct btrfs_leaf_ref_tree *tree;
        int in_tree;
        atomic_t usage;
 
@@ -64,8 +68,10 @@ struct btrfs_leaf_ref *btrfs_alloc_leaf_ref(struct btrfs_root *root,
 void btrfs_free_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);
 struct btrfs_leaf_ref *btrfs_lookup_leaf_ref(struct btrfs_root *root,
                                             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, u64 max_root_gen);
+int btrfs_add_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref,
+                      int shared);
+int btrfs_remove_leaf_refs(struct btrfs_root *root, u64 max_root_gen,
+                          int shared);
 int btrfs_remove_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);
 
 #endif