1/* 2 * Copyright (C) 2009 Oracle. All rights reserved. 3 * 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. 7 * 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. 12 * 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. 17 */ 18 19#ifndef __BTRFS_FREE_SPACE_CACHE 20#define __BTRFS_FREE_SPACE_CACHE 21 22struct btrfs_free_space { 23 struct rb_node offset_index; 24 u64 offset; 25 u64 bytes; 26 unsigned long *bitmap; 27 struct list_head list; 28}; 29 30int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, 31 u64 bytenr, u64 size); 32int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, 33 u64 bytenr, u64 size); 34void btrfs_remove_free_space_cache(struct btrfs_block_group_cache 35 *block_group); 36u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group, 37 u64 offset, u64 bytes, u64 empty_size); 38void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group, 39 u64 bytes); 40u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group); 41int btrfs_find_space_cluster(struct btrfs_trans_handle *trans, 42 struct btrfs_root *root, 43 struct btrfs_block_group_cache *block_group, 44 struct btrfs_free_cluster *cluster, 45 u64 offset, u64 bytes, u64 empty_size); 46void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster); 47u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group, 48 struct btrfs_free_cluster *cluster, u64 bytes, 49 u64 min_start); 50int btrfs_return_cluster_to_free_space( 51 struct btrfs_block_group_cache *block_group, 52 struct btrfs_free_cluster *cluster); 53#endif 54