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;
10 struct btrfs_delayed_ref_head;
12 enum btrfs_extent_allocation_policy {
13 BTRFS_EXTENT_ALLOC_CLUSTERED,
14 BTRFS_EXTENT_ALLOC_ZONED,
17 struct find_free_extent_ctl {
18 /* Basic allocation info */
26 /* Where to start the search inside the bg */
29 /* For clustered allocation */
31 struct btrfs_free_cluster *last_ptr;
35 bool orig_have_caching_bg;
37 /* Allocation is called for tree-log */
40 /* Allocation is called for data relocation */
43 /* RAID index, converted from flags */
47 * Current loop number, check find_free_extent_update_loop() for details
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.
58 /* If current block group is cached */
61 /* Max contiguous hole found */
64 /* Total free space from free space cache, not always contiguous */
70 /* Hint where to start looking for an empty space */
73 /* Allocation policy */
74 enum btrfs_extent_allocation_policy policy;
76 /* Whether or not the allocator is currently following a hint */
79 /* Size class of block groups to prefer in early loops */
80 enum btrfs_block_group_size_class size_class;
83 enum btrfs_inline_ref_type {
84 BTRFS_REF_TYPE_INVALID,
90 int 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);
93 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
95 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, u64 min_bytes);
96 u64 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);
99 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
100 int 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,
104 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
106 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
107 const struct extent_buffer *eb);
108 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
109 int btrfs_cross_ref_exist(struct btrfs_root *root,
110 u64 objectid, u64 offset, u64 bytenr, bool strict,
111 struct btrfs_path *path);
112 struct 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,
119 enum btrfs_lock_nesting nest);
120 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
122 struct extent_buffer *buf,
123 u64 parent, int last_ref);
124 int 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);
128 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
129 u64 root_objectid, u64 owner, u64 offset,
130 struct btrfs_key *ins);
131 int 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);
134 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
135 struct extent_buffer *buf, int full_backref);
136 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
137 struct extent_buffer *buf, int full_backref);
138 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
139 struct extent_buffer *eb, u64 flags);
140 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
142 u64 btrfs_get_extent_owner_root(struct btrfs_fs_info *fs_info,
143 struct extent_buffer *leaf, int slot);
144 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
145 u64 start, u64 len, int delalloc);
146 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans,
147 const struct extent_buffer *eb);
148 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
149 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_ref *generic_ref);
150 int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
152 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
153 struct btrfs_root *root,
154 struct extent_buffer *node,
155 struct extent_buffer *parent);