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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
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_check_trunc_cache_free_space(struct btrfs_root *root,
58 struct btrfs_block_rsv *rsv);
59int btrfs_truncate_free_space_cache(struct btrfs_root *root,
60 struct btrfs_trans_handle *trans,
61 struct inode *inode);
62int load_free_space_cache(struct btrfs_fs_info *fs_info,
63 struct btrfs_block_group_cache *block_group);
64int 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);
68
69struct 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,
78 struct btrfs_path *path,
79 struct inode *inode);
80
81void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
82int __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}
91int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
92 u64 bytenr, u64 size);
93void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
94void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
95 *block_group);
96u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
97 u64 offset, u64 bytes, u64 empty_size,
98 u64 *max_extent_size);
99u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
100void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
101 u64 bytes);
102int btrfs_find_space_cluster(struct btrfs_root *root,
103 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,
109 u64 min_start, u64 *max_extent_size);
110int btrfs_return_cluster_to_free_space(
111 struct btrfs_block_group_cache *block_group,
112 struct btrfs_free_cluster *cluster);
113int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
114 u64 *trimmed, u64 start, u64 end, u64 minlen);
115
116/* 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
123
124#endif