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 inode
*lookup_free_space_inode(struct btrfs_root
*root
,
31 struct btrfs_block_group_cache
32 *block_group
, struct btrfs_path
*path
);
33 int create_free_space_inode(struct btrfs_root
*root
,
34 struct btrfs_trans_handle
*trans
,
35 struct btrfs_block_group_cache
*block_group
,
36 struct btrfs_path
*path
);
37 int btrfs_truncate_free_space_cache(struct btrfs_root
*root
,
38 struct btrfs_trans_handle
*trans
,
39 struct btrfs_path
*path
,
41 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
42 u64 bytenr
, u64 size
);
43 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
44 u64 bytenr
, u64 size
);
45 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
47 u64
btrfs_find_space_for_alloc(struct btrfs_block_group_cache
*block_group
,
48 u64 offset
, u64 bytes
, u64 empty_size
);
49 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
51 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);
52 int btrfs_find_space_cluster(struct btrfs_trans_handle
*trans
,
53 struct btrfs_root
*root
,
54 struct btrfs_block_group_cache
*block_group
,
55 struct btrfs_free_cluster
*cluster
,
56 u64 offset
, u64 bytes
, u64 empty_size
);
57 void btrfs_init_free_cluster(struct btrfs_free_cluster
*cluster
);
58 u64
btrfs_alloc_from_cluster(struct btrfs_block_group_cache
*block_group
,
59 struct btrfs_free_cluster
*cluster
, u64 bytes
,
61 int btrfs_return_cluster_to_free_space(
62 struct btrfs_block_group_cache
*block_group
,
63 struct btrfs_free_cluster
*cluster
);
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