blob: 0cf4977ef70dffb69552c96f108b9b643dfbc152 [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;
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
Miao Xie7b61cd92013-05-13 13:55:09 +000057int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
58 struct btrfs_block_rsv *rsv);
Josef Bacik0af3d002010-06-21 14:48:16 -040059int btrfs_truncate_free_space_cache(struct btrfs_root *root,
60 struct btrfs_trans_handle *trans,
Josef Bacik0af3d002010-06-21 14:48:16 -040061 struct inode *inode);
Josef Bacik9d66e232010-08-25 16:54:15 -040062int load_free_space_cache(struct btrfs_fs_info *fs_info,
63 struct btrfs_block_group_cache *block_group);
Josef Bacik0cb59c92010-07-02 12:14:14 -040064int btrfs_write_out_cache(struct btrfs_root *root,
65 struct btrfs_trans_handle *trans,
66 struct btrfs_block_group_cache *block_group,
67 struct btrfs_path *path);
Li Zefan581bb052011-04-20 10:06:11 +080068
Li Zefan82d59022011-04-20 10:33:24 +080069struct inode *lookup_free_ino_inode(struct btrfs_root *root,
70 struct btrfs_path *path);
71int create_free_ino_inode(struct btrfs_root *root,
72 struct btrfs_trans_handle *trans,
73 struct btrfs_path *path);
74int load_free_ino_cache(struct btrfs_fs_info *fs_info,
75 struct btrfs_root *root);
76int btrfs_write_out_ino_cache(struct btrfs_root *root,
77 struct btrfs_trans_handle *trans,
Filipe David Borba Manana53645a92013-09-20 14:43:28 +010078 struct btrfs_path *path,
79 struct inode *inode);
Li Zefan82d59022011-04-20 10:33:24 +080080
Li Zefan34d52cb2011-03-29 13:46:06 +080081void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
Li Zefan581bb052011-04-20 10:06:11 +080082int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
83 u64 bytenr, u64 size);
84static inline int
85btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
86 u64 bytenr, u64 size)
87{
88 return __btrfs_add_free_space(block_group->free_space_ctl,
89 bytenr, size);
90}
Chris Masonfa9c0d792009-04-03 09:47:43 -040091int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
92 u64 bytenr, u64 size);
Li Zefan581bb052011-04-20 10:06:11 +080093void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
Chris Masonfa9c0d792009-04-03 09:47:43 -040094void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
Li Zefan581bb052011-04-20 10:06:11 +080095 *block_group);
Chris Masonfa9c0d792009-04-03 09:47:43 -040096u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
Miao Xiea4820392013-09-09 13:19:42 +080097 u64 offset, u64 bytes, u64 empty_size,
98 u64 *max_extent_size);
Li Zefan581bb052011-04-20 10:06:11 +080099u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
Chris Masonfa9c0d792009-04-03 09:47:43 -0400100void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
101 u64 bytes);
Josef Bacik00361582013-08-14 14:02:47 -0400102int btrfs_find_space_cluster(struct btrfs_root *root,
Chris Masonfa9c0d792009-04-03 09:47:43 -0400103 struct btrfs_block_group_cache *block_group,
104 struct btrfs_free_cluster *cluster,
105 u64 offset, u64 bytes, u64 empty_size);
106void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
107u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
108 struct btrfs_free_cluster *cluster, u64 bytes,
Miao Xiea4820392013-09-09 13:19:42 +0800109 u64 min_start, u64 *max_extent_size);
Chris Masonfa9c0d792009-04-03 09:47:43 -0400110int btrfs_return_cluster_to_free_space(
111 struct btrfs_block_group_cache *block_group,
112 struct btrfs_free_cluster *cluster);
Li Dongyangf7039b12011-03-24 10:24:28 +0000113int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
114 u64 *trimmed, u64 start, u64 end, u64 minlen);
Josef Bacik74255aa2013-03-15 09:47:08 -0400115
Josef Bacikdc11dd5d2013-08-14 15:05:12 -0400116/* Support functions for runnint our sanity tests */
117#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
118int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
119 u64 offset, u64 bytes, bool bitmap);
120int test_check_exists(struct btrfs_block_group_cache *cache,
121 u64 offset, u64 bytes);
122#endif
Josef Bacik74255aa2013-03-15 09:47:08 -0400123
Chris Masonfa9c0d792009-04-03 09:47:43 -0400124#endif