Btrfs progs v4.17.1
[btrfs-progs-unstable/devel.git] / free-space-cache.h
blob707fb6d39886026017a1a6d2402e4a5f70842a15
1 /*
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_H__
20 #define __BTRFS_FREE_SPACE_CACHE_H__
22 #include "kerncompat.h"
23 #include "ctree.h"
24 #include "rbtree.h"
26 struct btrfs_free_space {
27 struct rb_node offset_index;
28 u64 offset;
29 u64 bytes;
30 unsigned long *bitmap;
31 struct list_head list;
34 struct btrfs_free_space_ctl {
35 struct rb_root free_space_offset;
36 u64 free_space;
37 int extents_thresh;
38 int free_extents;
39 int total_bitmaps;
40 int unit;
41 u64 start;
42 void *private;
43 u32 sectorsize;
46 int load_free_space_cache(struct btrfs_fs_info *fs_info,
47 struct btrfs_block_group_cache *block_group);
49 void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
50 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
51 *block_group);
52 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
53 u64 bytes);
54 struct btrfs_free_space *
55 btrfs_find_free_space(struct btrfs_free_space_ctl *ctl, u64 offset, u64 bytes);
56 int btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group,
57 int sectorsize);
58 void unlink_free_space(struct btrfs_free_space_ctl *ctl,
59 struct btrfs_free_space *info);
60 int btrfs_add_free_space(struct btrfs_free_space_ctl *ctl, u64 offset,
61 u64 bytes);
62 int btrfs_clear_free_space_cache(struct btrfs_fs_info *fs_info,
63 struct btrfs_block_group_cache *bg);
64 #endif