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[linux-2.6.git] / fs / btrfs / free-space-cache.h
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
22 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
23                          u64 bytenr, u64 size);
24 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
25                             u64 bytenr, u64 size);
26 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
27                                    *block_group);
28 u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
29                                u64 offset, u64 bytes, u64 empty_size);
30 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
31                            u64 bytes);
32 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);
33 int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
34                              struct btrfs_root *root,
35                              struct btrfs_block_group_cache *block_group,
36                              struct btrfs_free_cluster *cluster,
37                              u64 offset, u64 bytes, u64 empty_size);
38 void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
39 u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
40                              struct btrfs_free_cluster *cluster, u64 bytes,
41                              u64 min_start);
42 int btrfs_return_cluster_to_free_space(
43                                struct btrfs_block_group_cache *block_group,
44                                struct btrfs_free_cluster *cluster);
45 #endif