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 <linux/list.h> |
7 | |
8 | struct extent_buffer; |
9 | struct btrfs_fs_info; |
10 | struct btrfs_path; |
11 | struct btrfs_root; |
12 | struct btrfs_seq_list; |
13 | |
14 | /* Represents a tree mod log user. */ |
15 | struct 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 | |
23 | enum 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 | |
33 | u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, |
34 | struct btrfs_seq_list *elem); |
35 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, |
36 | struct btrfs_seq_list *elem); |
37 | int btrfs_tree_mod_log_insert_root(struct extent_buffer *old_root, |
38 | struct extent_buffer *new_root, |
39 | bool log_removal); |
40 | int btrfs_tree_mod_log_insert_key(struct extent_buffer *eb, int slot, |
41 | enum btrfs_mod_log_op op); |
42 | int btrfs_tree_mod_log_free_eb(struct extent_buffer *eb); |
43 | struct 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); |
47 | struct extent_buffer *btrfs_get_old_root(struct btrfs_root *root, u64 time_seq); |
48 | int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); |
49 | int btrfs_tree_mod_log_eb_copy(struct extent_buffer *dst, |
50 | struct extent_buffer *src, |
51 | unsigned long dst_offset, |
52 | unsigned long src_offset, |
53 | int nr_items); |
54 | int btrfs_tree_mod_log_insert_move(struct extent_buffer *eb, |
55 | int dst_slot, int src_slot, |
56 | int nr_items); |
57 | u64 btrfs_tree_mod_log_lowest_seq(struct btrfs_fs_info *fs_info); |
58 | |
59 | #endif |
60 | |