1 // SPDX-License-Identifier: GPL-2.0
3 #ifndef BTRFS_TREE_MOD_LOG_H
4 #define BTRFS_TREE_MOD_LOG_H
8 /* Represents a tree mod log user. */
9 struct btrfs_seq_list
{
10 struct list_head list
;
14 #define BTRFS_SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
15 #define BTRFS_SEQ_LAST ((u64)-1)
17 enum btrfs_mod_log_op
{
18 BTRFS_MOD_LOG_KEY_REPLACE
,
19 BTRFS_MOD_LOG_KEY_ADD
,
20 BTRFS_MOD_LOG_KEY_REMOVE
,
21 BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING
,
22 BTRFS_MOD_LOG_KEY_REMOVE_WHILE_MOVING
,
23 BTRFS_MOD_LOG_MOVE_KEYS
,
24 BTRFS_MOD_LOG_ROOT_REPLACE
,
27 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
28 struct btrfs_seq_list
*elem
);
29 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
30 struct btrfs_seq_list
*elem
);
31 int btrfs_tree_mod_log_insert_root(struct extent_buffer
*old_root
,
32 struct extent_buffer
*new_root
,
34 int btrfs_tree_mod_log_insert_key(struct extent_buffer
*eb
, int slot
,
35 enum btrfs_mod_log_op op
, gfp_t flags
);
36 int btrfs_tree_mod_log_free_eb(struct extent_buffer
*eb
);
37 struct extent_buffer
*btrfs_tree_mod_log_rewind(struct btrfs_fs_info
*fs_info
,
38 struct btrfs_path
*path
,
39 struct extent_buffer
*eb
,
41 struct extent_buffer
*btrfs_get_old_root(struct btrfs_root
*root
, u64 time_seq
);
42 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
43 int btrfs_tree_mod_log_eb_copy(struct extent_buffer
*dst
,
44 struct extent_buffer
*src
,
45 unsigned long dst_offset
,
46 unsigned long src_offset
,
48 int btrfs_tree_mod_log_insert_move(struct extent_buffer
*eb
,
49 int dst_slot
, int src_slot
,
51 u64
btrfs_tree_mod_log_lowest_seq(struct btrfs_fs_info
*fs_info
);