2 * Copyright (C) 2008 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
21 struct btrfs_extent_info {
28 struct btrfs_leaf_ref {
29 struct rb_node rb_node;
39 struct list_head list;
40 struct btrfs_extent_info extents[];
43 static inline size_t btrfs_leaf_ref_size(int nr_extents)
45 return sizeof(struct btrfs_leaf_ref) +
46 sizeof(struct btrfs_extent_info) * nr_extents;
49 static inline void btrfs_leaf_ref_tree_init(struct btrfs_leaf_ref_tree *tree)
51 tree->root.rb_node = NULL;
52 INIT_LIST_HEAD(&tree->list);
53 spin_lock_init(&tree->lock);
56 static inline int btrfs_leaf_ref_tree_empty(struct btrfs_leaf_ref_tree *tree)
58 return RB_EMPTY_ROOT(&tree->root);
61 void btrfs_leaf_ref_tree_init(struct btrfs_leaf_ref_tree *tree);
62 struct btrfs_leaf_ref *btrfs_alloc_leaf_ref(struct btrfs_root *root,
64 void btrfs_free_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);
65 struct btrfs_leaf_ref *btrfs_lookup_leaf_ref(struct btrfs_root *root,
67 int btrfs_add_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);
68 int btrfs_remove_leaf_refs(struct btrfs_root *root, u64 max_root_gen);
69 int btrfs_remove_leaf_ref(struct btrfs_root *root, struct btrfs_leaf_ref *ref);