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 9 struct btrfs_free_cluster; 10 11 enum btrfs_extent_allocation_policy { 12 BTRFS_EXTENT_ALLOC_CLUSTERED, 13 BTRFS_EXTENT_ALLOC_ZONED, 14 }; 15 16 struct find_free_extent_ctl { 17 /* Basic allocation info */ 18 u64 ram_bytes; 19 u64 num_bytes; 20 u64 min_alloc_size; 21 u64 empty_size; 22 u64 flags; 23 int delalloc; 24 25 /* Where to start the search inside the bg */ 26 u64 search_start; 27 28 /* For clustered allocation */ 29 u64 empty_cluster; 30 struct btrfs_free_cluster *last_ptr; 31 bool use_cluster; 32 33 bool have_caching_bg; 34 bool orig_have_caching_bg; 35 36 /* Allocation is called for tree-log */ 37 bool for_treelog; 38 39 /* Allocation is called for data relocation */ 40 bool for_data_reloc; 41 42 /* RAID index, converted from flags */ 43 int index; 44 45 /* 46 * Current loop number, check find_free_extent_update_loop() for details 47 */ 48 int loop; 49 50 /* 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. 54 */ 55 bool retry_uncached; 56 57 /* If current block group is cached */ 58 int cached; 59 60 /* Max contiguous hole found */ 61 u64 max_extent_size; 62 63 /* Total free space from free space cache, not always contiguous */ 64 u64 total_free_space; 65 66 /* Found result */ 67 u64 found_offset; 68 69 /* Hint where to start looking for an empty space */ 70 u64 hint_byte; 71 72 /* Allocation policy */ 73 enum btrfs_extent_allocation_policy policy; 74 75 /* Whether or not the allocator is currently following a hint */ 76 bool hinted; 77 78 /* Size class of block groups to prefer in early loops */ 79 enum btrfs_block_group_size_class size_class; 80 }; 81 82 enum btrfs_inline_ref_type { 83 BTRFS_REF_TYPE_INVALID, 84 BTRFS_REF_TYPE_BLOCK, 85 BTRFS_REF_TYPE_DATA, 86 BTRFS_REF_TYPE_ANY, 87 }; 88 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); 93 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, 103 int reserved); 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, 114 int level, u64 hint, 115 u64 empty_size, 116 enum btrfs_lock_nesting nest); 117 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 118 u64 root_id, 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); 138 139 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, 145 int for_reloc); 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); 150 151 #endif 152