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// SPDX-License-Identifier: GPL-2.0
#ifndef BTRFS_TREE_MOD_LOG_H
#define BTRFS_TREE_MOD_LOG_H
#include "ctree.h"
/* Represents a tree mod log user. */
struct btrfs_seq_list {
struct list_head list;
u64 seq;
};
#define BTRFS_SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
#define BTRFS_SEQ_LAST ((u64)-1)
enum btrfs_mod_log_op {
BTRFS_MOD_LOG_KEY_REPLACE,
BTRFS_MOD_LOG_KEY_ADD,
BTRFS_MOD_LOG_KEY_REMOVE,
BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING,
BTRFS_MOD_LOG_KEY_REMOVE_WHILE_MOVING,
BTRFS_MOD_LOG_MOVE_KEYS,
BTRFS_MOD_LOG_ROOT_REPLACE,
};
u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
struct btrfs_seq_list *elem);
void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
struct btrfs_seq_list *elem);
int btrfs_tree_mod_log_insert_root(struct extent_buffer *old_root,
struct extent_buffer *new_root,
bool log_removal);
int btrfs_tree_mod_log_insert_key(struct extent_buffer *eb, int slot,
enum btrfs_mod_log_op op, gfp_t flags);
int btrfs_tree_mod_log_free_eb(struct extent_buffer *eb);
struct extent_buffer *btrfs_tree_mod_log_rewind(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
struct extent_buffer *eb,
u64 time_seq);
struct extent_buffer *btrfs_get_old_root(struct btrfs_root *root, u64 time_seq);
int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
int btrfs_tree_mod_log_eb_copy(struct extent_buffer *dst,
struct extent_buffer *src,
unsigned long dst_offset,
unsigned long src_offset,
int nr_items);
int btrfs_tree_mod_log_insert_move(struct extent_buffer *eb,
int dst_slot, int src_slot,
int nr_items);
u64 btrfs_tree_mod_log_lowest_seq(struct btrfs_fs_info *fs_info);
#endif
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