blob: 8f2613f779edc6bfb2dfcac1e6884f2d7ad156b7 [file] [log] [blame]
Chris Masonfa9c0d72009-04-03 09:47:43 -04001/*
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
Josef Bacik96303082009-07-13 21:29:25 -040022struct 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
Li Zefan34d52cb2011-03-29 13:46:06 +080030struct btrfs_free_space_ctl {
31 spinlock_t tree_lock;
32 struct rb_root free_space_offset;
33 u64 free_space;
34 int extents_thresh;
35 int free_extents;
36 int total_bitmaps;
37 int unit;
38 u64 start;
39 struct btrfs_free_space_op *op;
40 void *private;
41};
42
43struct btrfs_free_space_op {
44 void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
45 bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
46 struct btrfs_free_space *info);
47};
48
Josef Bacik0af3d002010-06-21 14:48:16 -040049struct inode *lookup_free_space_inode(struct btrfs_root *root,
50 struct btrfs_block_group_cache
51 *block_group, struct btrfs_path *path);
52int create_free_space_inode(struct btrfs_root *root,
53 struct btrfs_trans_handle *trans,
54 struct btrfs_block_group_cache *block_group,
55 struct btrfs_path *path);
Josef Bacik0cb59c92010-07-02 12:14:14 -040056
Josef Bacik0af3d002010-06-21 14:48:16 -040057int btrfs_truncate_free_space_cache(struct btrfs_root *root,
58 struct btrfs_trans_handle *trans,
59 struct btrfs_path *path,
60 struct inode *inode);
Josef Bacik9d66e232010-08-25 16:54:15 -040061int load_free_space_cache(struct btrfs_fs_info *fs_info,
62 struct btrfs_block_group_cache *block_group);
Josef Bacik0cb59c92010-07-02 12:14:14 -040063int btrfs_write_out_cache(struct btrfs_root *root,
64 struct btrfs_trans_handle *trans,
65 struct btrfs_block_group_cache *block_group,
66 struct btrfs_path *path);
Li Zefan581bb052011-04-20 10:06:11 +080067
Li Zefan82d59022011-04-20 10:33:24 +080068struct inode *lookup_free_ino_inode(struct btrfs_root *root,
69 struct btrfs_path *path);
70int create_free_ino_inode(struct btrfs_root *root,
71 struct btrfs_trans_handle *trans,
72 struct btrfs_path *path);
73int load_free_ino_cache(struct btrfs_fs_info *fs_info,
74 struct btrfs_root *root);
75int btrfs_write_out_ino_cache(struct btrfs_root *root,
76 struct btrfs_trans_handle *trans,
77 struct btrfs_path *path);
78
Li Zefan34d52cb2011-03-29 13:46:06 +080079void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
Li Zefan581bb052011-04-20 10:06:11 +080080int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
81 u64 bytenr, u64 size);
82static inline int
83btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
84 u64 bytenr, u64 size)
85{
86 return __btrfs_add_free_space(block_group->free_space_ctl,
87 bytenr, size);
88}
Chris Masonfa9c0d72009-04-03 09:47:43 -040089int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
90 u64 bytenr, u64 size);
Li Zefan581bb052011-04-20 10:06:11 +080091void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
Chris Masonfa9c0d72009-04-03 09:47:43 -040092void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
Li Zefan581bb052011-04-20 10:06:11 +080093 *block_group);
Chris Masonfa9c0d72009-04-03 09:47:43 -040094u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
95 u64 offset, u64 bytes, u64 empty_size);
Li Zefan581bb052011-04-20 10:06:11 +080096u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
Chris Masonfa9c0d72009-04-03 09:47:43 -040097void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
98 u64 bytes);
Chris Masonfa9c0d72009-04-03 09:47:43 -040099int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
Chris Mason451d7582009-06-09 20:28:34 -0400100 struct btrfs_root *root,
Chris Masonfa9c0d72009-04-03 09:47:43 -0400101 struct btrfs_block_group_cache *block_group,
102 struct btrfs_free_cluster *cluster,
103 u64 offset, u64 bytes, u64 empty_size);
104void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
105u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
106 struct btrfs_free_cluster *cluster, u64 bytes,
107 u64 min_start);
108int btrfs_return_cluster_to_free_space(
109 struct btrfs_block_group_cache *block_group,
110 struct btrfs_free_cluster *cluster);
Li Dongyangf7039b12011-03-24 10:24:28 +0000111int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
112 u64 *trimmed, u64 start, u64 end, u64 minlen);
Chris Masonfa9c0d72009-04-03 09:47:43 -0400113#endif