linux/fs/btrfs/extent-tree.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef BTRFS_EXTENT_TREE_H
#define BTRFS_EXTENT_TREE_H

enum btrfs_inline_ref_type {
	BTRFS_REF_TYPE_INVALID,
	BTRFS_REF_TYPE_BLOCK,
	BTRFS_REF_TYPE_DATA,
	BTRFS_REF_TYPE_ANY,
};

int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
				     struct btrfs_extent_inline_ref *iref,
				     enum btrfs_inline_ref_type is_data);
u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);

int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
			      u64 start, u64 num_bytes);
void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, unsigned long count);
void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
				  struct btrfs_delayed_ref_root *delayed_refs,
				  struct btrfs_delayed_ref_head *head);
int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_fs_info *fs_info, u64 bytenr,
			     u64 offset, int metadata, u64 *refs, u64 *flags);
int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
		     int reserved);
int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
				    u64 bytenr, u64 num_bytes);
int btrfs_exclude_logged_extents(struct extent_buffer *eb);
int btrfs_cross_ref_exist(struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr, bool strict,
			  struct btrfs_path *path);
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
					     struct btrfs_root *root,
					     u64 parent, u64 root_objectid,
					     const struct btrfs_disk_key *key,
					     int level, u64 hint,
					     u64 empty_size,
					     enum btrfs_lock_nesting nest);
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   u64 root_id,
			   struct extent_buffer *buf,
			   u64 parent, int last_ref);
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
				     struct btrfs_root *root, u64 owner,
				     u64 offset, u64 ram_bytes,
				     struct btrfs_key *ins);
int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
				   u64 root_objectid, u64 owner, u64 offset,
				   struct btrfs_key *ins);
int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
			 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
			 struct btrfs_key *ins, int is_data, int delalloc);
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		  struct extent_buffer *buf, int full_backref);
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		  struct extent_buffer *buf, int full_backref);
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct extent_buffer *eb, u64 flags, int level);
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);

int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
			       u64 start, u64 len, int delalloc);
int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, u64 len);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_ref *generic_ref);
int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
				     int for_reloc);
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);

#endif