1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef BTRFS_EXTENT_TREE_H
4 #define BTRFS_EXTENT_TREE_H
7 #include "block-group.h"
9 struct btrfs_free_cluster;
11 enum btrfs_extent_allocation_policy {
12 BTRFS_EXTENT_ALLOC_CLUSTERED,
13 BTRFS_EXTENT_ALLOC_ZONED,
16 struct find_free_extent_ctl {
17 /* Basic allocation info */
25 /* Where to start the search inside the bg */
28 /* For clustered allocation */
30 struct btrfs_free_cluster *last_ptr;
34 bool orig_have_caching_bg;
36 /* Allocation is called for tree-log */
39 /* Allocation is called for data relocation */
42 /* RAID index, converted from flags */
46 * Current loop number, check find_free_extent_update_loop() for details
51 * Set to true if we're retrying the allocation on this block group
52 * after waiting for caching progress, this is so that we retry only
53 * once before moving on to another block group.
57 /* If current block group is cached */
60 /* Max contiguous hole found */
63 /* Total free space from free space cache, not always contiguous */
69 /* Hint where to start looking for an empty space */
72 /* Allocation policy */
73 enum btrfs_extent_allocation_policy policy;
75 /* Whether or not the allocator is currently following a hint */
78 /* Size class of block groups to prefer in early loops */
79 enum btrfs_block_group_size_class size_class;
82 enum btrfs_inline_ref_type {
83 BTRFS_REF_TYPE_INVALID,
89 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
90 struct btrfs_extent_inline_ref *iref,
91 enum btrfs_inline_ref_type is_data);
92 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
94 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, unsigned long count);
95 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
96 struct btrfs_delayed_ref_root *delayed_refs,
97 struct btrfs_delayed_ref_head *head);
98 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
99 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
100 struct btrfs_fs_info *fs_info, u64 bytenr,
101 u64 offset, int metadata, u64 *refs, u64 *flags);
102 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
104 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
105 u64 bytenr, u64 num_bytes);
106 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
107 int btrfs_cross_ref_exist(struct btrfs_root *root,
108 u64 objectid, u64 offset, u64 bytenr, bool strict,
109 struct btrfs_path *path);
110 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
111 struct btrfs_root *root,
112 u64 parent, u64 root_objectid,
113 const struct btrfs_disk_key *key,
116 enum btrfs_lock_nesting nest);
117 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
119 struct extent_buffer *buf,
120 u64 parent, int last_ref);
121 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
122 struct btrfs_root *root, u64 owner,
123 u64 offset, u64 ram_bytes,
124 struct btrfs_key *ins);
125 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
126 u64 root_objectid, u64 owner, u64 offset,
127 struct btrfs_key *ins);
128 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
129 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
130 struct btrfs_key *ins, int is_data, int delalloc);
131 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
132 struct extent_buffer *buf, int full_backref);
133 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
134 struct extent_buffer *buf, int full_backref);
135 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
136 struct extent_buffer *eb, u64 flags);
137 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
139 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
140 u64 start, u64 len, int delalloc);
141 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, u64 len);
142 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
143 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_ref *generic_ref);
144 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
146 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
147 struct btrfs_root *root,
148 struct extent_buffer *node,
149 struct extent_buffer *parent);