1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | |
3 | #ifndef BTRFS_TREE_MOD_LOG_H |
4 | #define BTRFS_TREE_MOD_LOG_H |
5 | |
6 | #include "ctree.h" |
7 | |
8 | /* Represents a tree mod log user. */ |
9 | struct btrfs_seq_list { |
10 | struct list_head list; |
11 | u64 seq; |
12 | }; |
13 | |
14 | #define BTRFS_SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } |
15 | #define BTRFS_SEQ_LAST ((u64)-1) |
16 | |
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, |
25 | }; |
26 | |
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, |
33 | bool log_removal); |
34 | int btrfs_tree_mod_log_insert_key(struct extent_buffer *eb, int slot, |
35 | enum btrfs_mod_log_op op); |
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, |
40 | u64 time_seq); |
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, |
47 | int nr_items); |
48 | int btrfs_tree_mod_log_insert_move(struct extent_buffer *eb, |
49 | int dst_slot, int src_slot, |
50 | int nr_items); |
51 | u64 btrfs_tree_mod_log_lowest_seq(struct btrfs_fs_info *fs_info); |
52 | |
53 | #endif |
54 | |