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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2009 Oracle. All rights reserved.
4 */
5
6#ifndef BTRFS_FREE_SPACE_CACHE_H
7#define BTRFS_FREE_SPACE_CACHE_H
8
9struct btrfs_free_space {
10 struct rb_node offset_index;
11 u64 offset;
12 u64 bytes;
13 u64 max_extent_size;
14 unsigned long *bitmap;
15 struct list_head list;
16};
17
18struct btrfs_free_space_ctl {
19 spinlock_t tree_lock;
20 struct rb_root free_space_offset;
21 u64 free_space;
22 int extents_thresh;
23 int free_extents;
24 int total_bitmaps;
25 int unit;
26 u64 start;
27 const struct btrfs_free_space_op *op;
28 void *private;
29 struct mutex cache_writeout_mutex;
30 struct list_head trimming_ranges;
31};
32
33struct btrfs_free_space_op {
34 void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
35 bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
36 struct btrfs_free_space *info);
37};
38
39struct btrfs_io_ctl;
40
41struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
42 struct btrfs_block_group_cache
43 *block_group, struct btrfs_path *path);
44int create_free_space_inode(struct btrfs_fs_info *fs_info,
45 struct btrfs_trans_handle *trans,
46 struct btrfs_block_group_cache *block_group,
47 struct btrfs_path *path);
48
49int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
50 struct btrfs_block_rsv *rsv);
51int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
52 struct btrfs_block_group_cache *block_group,
53 struct inode *inode);
54int load_free_space_cache(struct btrfs_fs_info *fs_info,
55 struct btrfs_block_group_cache *block_group);
56int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
57 struct btrfs_block_group_cache *block_group,
58 struct btrfs_path *path);
59int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
60 struct btrfs_trans_handle *trans,
61 struct btrfs_block_group_cache *block_group,
62 struct btrfs_path *path);
63struct inode *lookup_free_ino_inode(struct btrfs_root *root,
64 struct btrfs_path *path);
65int create_free_ino_inode(struct btrfs_root *root,
66 struct btrfs_trans_handle *trans,
67 struct btrfs_path *path);
68int load_free_ino_cache(struct btrfs_fs_info *fs_info,
69 struct btrfs_root *root);
70int btrfs_write_out_ino_cache(struct btrfs_root *root,
71 struct btrfs_trans_handle *trans,
72 struct btrfs_path *path,
73 struct inode *inode);
74
75void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
76int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
77 struct btrfs_free_space_ctl *ctl,
78 u64 bytenr, u64 size);
79static inline int
80btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
81 u64 bytenr, u64 size)
82{
83 return __btrfs_add_free_space(block_group->fs_info,
84 block_group->free_space_ctl,
85 bytenr, size);
86}
87int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
88 u64 bytenr, u64 size);
89void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
90void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
91 *block_group);
92u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
93 u64 offset, u64 bytes, u64 empty_size,
94 u64 *max_extent_size);
95u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
96void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
97 u64 bytes);
98int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
99 struct btrfs_block_group_cache *block_group,
100 struct btrfs_free_cluster *cluster,
101 u64 offset, u64 bytes, u64 empty_size);
102void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
103u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
104 struct btrfs_free_cluster *cluster, u64 bytes,
105 u64 min_start, u64 *max_extent_size);
106int btrfs_return_cluster_to_free_space(
107 struct btrfs_block_group_cache *block_group,
108 struct btrfs_free_cluster *cluster);
109int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
110 u64 *trimmed, u64 start, u64 end, u64 minlen);
111
112/* Support functions for running our sanity tests */
113#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
114int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
115 u64 offset, u64 bytes, bool bitmap);
116int test_check_exists(struct btrfs_block_group_cache *cache,
117 u64 offset, u64 bytes);
118#endif
119
120#endif
1/*
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
22struct 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
30struct 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
49struct 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);
56
57int btrfs_truncate_free_space_cache(struct btrfs_root *root,
58 struct btrfs_trans_handle *trans,
59 struct btrfs_path *path,
60 struct inode *inode);
61int load_free_space_cache(struct btrfs_fs_info *fs_info,
62 struct btrfs_block_group_cache *block_group);
63int 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);
67
68struct 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
79void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
80int __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}
89int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
90 u64 bytenr, u64 size);
91void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
92void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
93 *block_group);
94u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
95 u64 offset, u64 bytes, u64 empty_size);
96u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
97void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
98 u64 bytes);
99int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
100 struct btrfs_root *root,
101 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);
111int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
112 u64 *trimmed, u64 start, u64 end, u64 minlen);
113#endif