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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef BTRFS_EXTENT_TREE_H
4#define BTRFS_EXTENT_TREE_H
5
6#include "misc.h"
7#include "block-group.h"
8
9struct btrfs_free_cluster;
10struct btrfs_delayed_ref_head;
11
12enum btrfs_extent_allocation_policy {
13 BTRFS_EXTENT_ALLOC_CLUSTERED,
14 BTRFS_EXTENT_ALLOC_ZONED,
15};
16
17struct find_free_extent_ctl {
18 /* Basic allocation info */
19 u64 ram_bytes;
20 u64 num_bytes;
21 u64 min_alloc_size;
22 u64 empty_size;
23 u64 flags;
24 int delalloc;
25
26 /* Where to start the search inside the bg */
27 u64 search_start;
28
29 /* For clustered allocation */
30 u64 empty_cluster;
31 struct btrfs_free_cluster *last_ptr;
32 bool use_cluster;
33
34 bool have_caching_bg;
35 bool orig_have_caching_bg;
36
37 /* Allocation is called for tree-log */
38 bool for_treelog;
39
40 /* Allocation is called for data relocation */
41 bool for_data_reloc;
42
43 /* RAID index, converted from flags */
44 int index;
45
46 /*
47 * Current loop number, check find_free_extent_update_loop() for details
48 */
49 int loop;
50
51 /*
52 * Set to true if we're retrying the allocation on this block group
53 * after waiting for caching progress, this is so that we retry only
54 * once before moving on to another block group.
55 */
56 bool retry_uncached;
57
58 /* If current block group is cached */
59 int cached;
60
61 /* Max contiguous hole found */
62 u64 max_extent_size;
63
64 /* Total free space from free space cache, not always contiguous */
65 u64 total_free_space;
66
67 /* Found result */
68 u64 found_offset;
69
70 /* Hint where to start looking for an empty space */
71 u64 hint_byte;
72
73 /* Allocation policy */
74 enum btrfs_extent_allocation_policy policy;
75
76 /* Whether or not the allocator is currently following a hint */
77 bool hinted;
78
79 /* Size class of block groups to prefer in early loops */
80 enum btrfs_block_group_size_class size_class;
81};
82
83enum btrfs_inline_ref_type {
84 BTRFS_REF_TYPE_INVALID,
85 BTRFS_REF_TYPE_BLOCK,
86 BTRFS_REF_TYPE_DATA,
87 BTRFS_REF_TYPE_ANY,
88};
89
90int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
91 struct btrfs_extent_inline_ref *iref,
92 enum btrfs_inline_ref_type is_data);
93u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
94
95int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, u64 min_bytes);
96u64 btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
97 struct btrfs_delayed_ref_root *delayed_refs,
98 struct btrfs_delayed_ref_head *head);
99int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
100int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
101 struct btrfs_fs_info *fs_info, u64 bytenr,
102 u64 offset, int metadata, u64 *refs, u64 *flags,
103 u64 *owner_root);
104int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
105 int reserved);
106int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
107 const struct extent_buffer *eb);
108int btrfs_exclude_logged_extents(struct extent_buffer *eb);
109int btrfs_cross_ref_exist(struct btrfs_root *root,
110 u64 objectid, u64 offset, u64 bytenr, bool strict,
111 struct btrfs_path *path);
112struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
113 struct btrfs_root *root,
114 u64 parent, u64 root_objectid,
115 const struct btrfs_disk_key *key,
116 int level, u64 hint,
117 u64 empty_size,
118 u64 reloc_src_root,
119 enum btrfs_lock_nesting nest);
120void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
121 u64 root_id,
122 struct extent_buffer *buf,
123 u64 parent, int last_ref);
124int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
125 struct btrfs_root *root, u64 owner,
126 u64 offset, u64 ram_bytes,
127 struct btrfs_key *ins);
128int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
129 u64 root_objectid, u64 owner, u64 offset,
130 struct btrfs_key *ins);
131int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
132 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
133 struct btrfs_key *ins, int is_data, int delalloc);
134int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
135 struct extent_buffer *buf, int full_backref);
136int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
137 struct extent_buffer *buf, int full_backref);
138int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
139 struct extent_buffer *eb, u64 flags);
140int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
141
142u64 btrfs_get_extent_owner_root(struct btrfs_fs_info *fs_info,
143 struct extent_buffer *leaf, int slot);
144int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
145 u64 start, u64 len, int delalloc);
146int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans,
147 const struct extent_buffer *eb);
148int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
149int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_ref *generic_ref);
150int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
151 int for_reloc);
152int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
153 struct btrfs_root *root,
154 struct extent_buffer *node,
155 struct extent_buffer *parent);
156
157#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef BTRFS_EXTENT_TREE_H
4#define BTRFS_EXTENT_TREE_H
5
6#include <linux/types.h>
7#include "misc.h"
8#include "block-group.h"
9#include "locking.h"
10
11struct extent_buffer;
12struct btrfs_free_cluster;
13struct btrfs_fs_info;
14struct btrfs_root;
15struct btrfs_path;
16struct btrfs_ref;
17struct btrfs_disk_key;
18struct btrfs_delayed_ref_head;
19struct btrfs_delayed_ref_root;
20struct btrfs_extent_inline_ref;
21
22enum btrfs_extent_allocation_policy {
23 BTRFS_EXTENT_ALLOC_CLUSTERED,
24 BTRFS_EXTENT_ALLOC_ZONED,
25};
26
27struct find_free_extent_ctl {
28 /* Basic allocation info */
29 u64 ram_bytes;
30 u64 num_bytes;
31 u64 min_alloc_size;
32 u64 empty_size;
33 u64 flags;
34 int delalloc;
35
36 /* Where to start the search inside the bg */
37 u64 search_start;
38
39 /* For clustered allocation */
40 u64 empty_cluster;
41 struct btrfs_free_cluster *last_ptr;
42 bool use_cluster;
43
44 bool have_caching_bg;
45 bool orig_have_caching_bg;
46
47 /* Allocation is called for tree-log */
48 bool for_treelog;
49
50 /* Allocation is called for data relocation */
51 bool for_data_reloc;
52
53 /* RAID index, converted from flags */
54 int index;
55
56 /*
57 * Current loop number, check find_free_extent_update_loop() for details
58 */
59 int loop;
60
61 /*
62 * Set to true if we're retrying the allocation on this block group
63 * after waiting for caching progress, this is so that we retry only
64 * once before moving on to another block group.
65 */
66 bool retry_uncached;
67
68 /* If current block group is cached */
69 int cached;
70
71 /* Max contiguous hole found */
72 u64 max_extent_size;
73
74 /* Total free space from free space cache, not always contiguous */
75 u64 total_free_space;
76
77 /* Found result */
78 u64 found_offset;
79
80 /* Hint where to start looking for an empty space */
81 u64 hint_byte;
82
83 /* Allocation policy */
84 enum btrfs_extent_allocation_policy policy;
85
86 /* Whether or not the allocator is currently following a hint */
87 bool hinted;
88
89 /* Size class of block groups to prefer in early loops */
90 enum btrfs_block_group_size_class size_class;
91};
92
93enum btrfs_inline_ref_type {
94 BTRFS_REF_TYPE_INVALID,
95 BTRFS_REF_TYPE_BLOCK,
96 BTRFS_REF_TYPE_DATA,
97 BTRFS_REF_TYPE_ANY,
98};
99
100int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
101 struct btrfs_extent_inline_ref *iref,
102 enum btrfs_inline_ref_type is_data);
103u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
104
105int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, u64 min_bytes);
106u64 btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
107 struct btrfs_delayed_ref_root *delayed_refs,
108 struct btrfs_delayed_ref_head *head);
109int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
110int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
111 struct btrfs_fs_info *fs_info, u64 bytenr,
112 u64 offset, int metadata, u64 *refs, u64 *flags,
113 u64 *owner_root);
114int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
115 int reserved);
116int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
117 const struct extent_buffer *eb);
118int btrfs_exclude_logged_extents(struct extent_buffer *eb);
119int btrfs_cross_ref_exist(struct btrfs_root *root,
120 u64 objectid, u64 offset, u64 bytenr, bool strict,
121 struct btrfs_path *path);
122struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
123 struct btrfs_root *root,
124 u64 parent, u64 root_objectid,
125 const struct btrfs_disk_key *key,
126 int level, u64 hint,
127 u64 empty_size,
128 u64 reloc_src_root,
129 enum btrfs_lock_nesting nest);
130void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
131 u64 root_id,
132 struct extent_buffer *buf,
133 u64 parent, int last_ref);
134int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
135 struct btrfs_root *root, u64 owner,
136 u64 offset, u64 ram_bytes,
137 struct btrfs_key *ins);
138int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
139 u64 root_objectid, u64 owner, u64 offset,
140 struct btrfs_key *ins);
141int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
142 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
143 struct btrfs_key *ins, int is_data, int delalloc);
144int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
145 struct extent_buffer *buf, int full_backref);
146int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
147 struct extent_buffer *buf, int full_backref);
148int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
149 struct extent_buffer *eb, u64 flags);
150int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
151
152u64 btrfs_get_extent_owner_root(struct btrfs_fs_info *fs_info,
153 struct extent_buffer *leaf, int slot);
154int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
155 u64 start, u64 len, int delalloc);
156int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans,
157 const struct extent_buffer *eb);
158int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
159int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_ref *generic_ref);
160int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
161 int for_reloc);
162int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
163 struct btrfs_root *root,
164 struct extent_buffer *node,
165 struct extent_buffer *parent);
166
167#endif