2 * Copyright (C) 2009 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.
19 #ifndef __BTRFS_FREE_SPACE_CACHE
20 #define __BTRFS_FREE_SPACE_CACHE
22 struct btrfs_free_space {
23 struct rb_node offset_index;
26 unsigned long *bitmap;
27 struct list_head list;
30 struct btrfs_free_space_ctl {
31 struct rb_root free_space_offset;
41 int load_free_space_cache(struct btrfs_fs_info *fs_info,
42 struct btrfs_block_group_cache *block_group);
44 void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
45 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
47 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
49 struct btrfs_free_space *
50 btrfs_find_free_space(struct btrfs_free_space_ctl *ctl, u64 offset, u64 bytes);
51 int btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group,
53 void unlink_free_space(struct btrfs_free_space_ctl *ctl,
54 struct btrfs_free_space *info);