blob: 33178c490ace0c55418d5ab40415594e1a91bb0c [file] [log] [blame]
Chris Masonfa9c0d792009-04-03 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;
Josef Bacikcef40482015-10-02 16:09:42 -040026 u64 max_extent_size;
Josef Bacik96303082009-07-13 21:29:25 -040027 unsigned long *bitmap;
28 struct list_head list;
29};
30
Li Zefan34d52cb2011-03-29 13:46:06 +080031struct btrfs_free_space_ctl {
32 spinlock_t tree_lock;
33 struct rb_root free_space_offset;
34 u64 free_space;
35 int extents_thresh;
36 int free_extents;
37 int total_bitmaps;
38 int unit;
39 u64 start;
David Sterba20e55062015-11-19 11:42:28 +010040 const struct btrfs_free_space_op *op;
Li Zefan34d52cb2011-03-29 13:46:06 +080041 void *private;
Filipe Manana55507ce2014-12-01 17:04:09 +000042 struct mutex cache_writeout_mutex;
43 struct list_head trimming_ranges;
Li Zefan34d52cb2011-03-29 13:46:06 +080044};
45
46struct btrfs_free_space_op {
47 void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
48 bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
49 struct btrfs_free_space *info);
50};
51
Chris Masonc9dc4c62015-04-04 17:14:42 -070052struct btrfs_io_ctl;
53
Josef Bacik0af3d002010-06-21 14:48:16 -040054struct inode *lookup_free_space_inode(struct btrfs_root *root,
55 struct btrfs_block_group_cache
56 *block_group, struct btrfs_path *path);
57int create_free_space_inode(struct btrfs_root *root,
58 struct btrfs_trans_handle *trans,
59 struct btrfs_block_group_cache *block_group,
60 struct btrfs_path *path);
Josef Bacik0cb59c92010-07-02 12:14:14 -040061
Miao Xie7b61cd92013-05-13 13:55:09 +000062int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
63 struct btrfs_block_rsv *rsv);
Josef Bacik0af3d002010-06-21 14:48:16 -040064int btrfs_truncate_free_space_cache(struct btrfs_root *root,
65 struct btrfs_trans_handle *trans,
Chris Mason1bbc6212015-04-06 12:46:08 -070066 struct btrfs_block_group_cache *block_group,
Josef Bacik0af3d002010-06-21 14:48:16 -040067 struct inode *inode);
Josef Bacik9d66e232010-08-25 16:54:15 -040068int load_free_space_cache(struct btrfs_fs_info *fs_info,
69 struct btrfs_block_group_cache *block_group);
Chris Masonc9dc4c62015-04-04 17:14:42 -070070int btrfs_wait_cache_io(struct btrfs_root *root,
71 struct btrfs_trans_handle *trans,
72 struct btrfs_block_group_cache *block_group,
73 struct btrfs_io_ctl *io_ctl,
74 struct btrfs_path *path, u64 offset);
Josef Bacik0cb59c92010-07-02 12:14:14 -040075int btrfs_write_out_cache(struct btrfs_root *root,
76 struct btrfs_trans_handle *trans,
77 struct btrfs_block_group_cache *block_group,
78 struct btrfs_path *path);
Li Zefan82d59022011-04-20 10:33:24 +080079struct inode *lookup_free_ino_inode(struct btrfs_root *root,
80 struct btrfs_path *path);
81int create_free_ino_inode(struct btrfs_root *root,
82 struct btrfs_trans_handle *trans,
83 struct btrfs_path *path);
84int load_free_ino_cache(struct btrfs_fs_info *fs_info,
85 struct btrfs_root *root);
86int btrfs_write_out_ino_cache(struct btrfs_root *root,
87 struct btrfs_trans_handle *trans,
Filipe David Borba Manana53645a92013-09-20 14:43:28 +010088 struct btrfs_path *path,
89 struct inode *inode);
Li Zefan82d59022011-04-20 10:33:24 +080090
Li Zefan34d52cb2011-03-29 13:46:06 +080091void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
Li Zefan581bb052011-04-20 10:06:11 +080092int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
93 u64 bytenr, u64 size);
94static inline int
95btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
96 u64 bytenr, u64 size)
97{
98 return __btrfs_add_free_space(block_group->free_space_ctl,
99 bytenr, size);
100}
Chris Masonfa9c0d792009-04-03 09:47:43 -0400101int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
102 u64 bytenr, u64 size);
Li Zefan581bb052011-04-20 10:06:11 +0800103void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
Chris Masonfa9c0d792009-04-03 09:47:43 -0400104void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
Li Zefan581bb052011-04-20 10:06:11 +0800105 *block_group);
Chris Masonfa9c0d792009-04-03 09:47:43 -0400106u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
Miao Xiea4820392013-09-09 13:19:42 +0800107 u64 offset, u64 bytes, u64 empty_size,
108 u64 *max_extent_size);
Li Zefan581bb052011-04-20 10:06:11 +0800109u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
Chris Masonfa9c0d792009-04-03 09:47:43 -0400110void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
111 u64 bytes);
Josef Bacik00361582013-08-14 14:02:47 -0400112int btrfs_find_space_cluster(struct btrfs_root *root,
Chris Masonfa9c0d792009-04-03 09:47:43 -0400113 struct btrfs_block_group_cache *block_group,
114 struct btrfs_free_cluster *cluster,
115 u64 offset, u64 bytes, u64 empty_size);
116void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
117u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
118 struct btrfs_free_cluster *cluster, u64 bytes,
Miao Xiea4820392013-09-09 13:19:42 +0800119 u64 min_start, u64 *max_extent_size);
Chris Masonfa9c0d792009-04-03 09:47:43 -0400120int btrfs_return_cluster_to_free_space(
121 struct btrfs_block_group_cache *block_group,
122 struct btrfs_free_cluster *cluster);
Li Dongyangf7039b12011-03-24 10:24:28 +0000123int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
124 u64 *trimmed, u64 start, u64 end, u64 minlen);
Josef Bacik74255aa2013-03-15 09:47:08 -0400125
Josef Bacikdc11dd52013-08-14 15:05:12 -0400126/* Support functions for runnint our sanity tests */
127#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
128int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
129 u64 offset, u64 bytes, bool bitmap);
130int test_check_exists(struct btrfs_block_group_cache *cache,
131 u64 offset, u64 bytes);
132#endif
Josef Bacik74255aa2013-03-15 09:47:08 -0400133
Chris Masonfa9c0d792009-04-03 09:47:43 -0400134#endif