60 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2 3#ifndef BTRFS_TREE_MOD_LOG_H4#define BTRFS_TREE_MOD_LOG_H5 6#include <linux/list.h>7 8struct extent_buffer;9struct btrfs_fs_info;10struct btrfs_path;11struct btrfs_root;12struct btrfs_seq_list;13 14/* Represents a tree mod log user. */15struct btrfs_seq_list {16 struct list_head list;17 u64 seq;18};19 20#define BTRFS_SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }21#define BTRFS_SEQ_LAST ((u64)-1)22 23enum btrfs_mod_log_op {24 BTRFS_MOD_LOG_KEY_REPLACE,25 BTRFS_MOD_LOG_KEY_ADD,26 BTRFS_MOD_LOG_KEY_REMOVE,27 BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING,28 BTRFS_MOD_LOG_KEY_REMOVE_WHILE_MOVING,29 BTRFS_MOD_LOG_MOVE_KEYS,30 BTRFS_MOD_LOG_ROOT_REPLACE,31};32 33u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,34 struct btrfs_seq_list *elem);35void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,36 struct btrfs_seq_list *elem);37int btrfs_tree_mod_log_insert_root(struct extent_buffer *old_root,38 struct extent_buffer *new_root,39 bool log_removal);40int btrfs_tree_mod_log_insert_key(const struct extent_buffer *eb, int slot,41 enum btrfs_mod_log_op op);42int btrfs_tree_mod_log_free_eb(struct extent_buffer *eb);43struct extent_buffer *btrfs_tree_mod_log_rewind(struct btrfs_fs_info *fs_info,44 struct btrfs_path *path,45 struct extent_buffer *eb,46 u64 time_seq);47struct extent_buffer *btrfs_get_old_root(struct btrfs_root *root, u64 time_seq);48int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);49int btrfs_tree_mod_log_eb_copy(struct extent_buffer *dst,50 const struct extent_buffer *src,51 unsigned long dst_offset,52 unsigned long src_offset,53 int nr_items);54int btrfs_tree_mod_log_insert_move(const struct extent_buffer *eb,55 int dst_slot, int src_slot,56 int nr_items);57u64 btrfs_tree_mod_log_lowest_seq(struct btrfs_fs_info *fs_info);58 59#endif60