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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_BTREE_JOURNAL_ITER_H
3#define _BCACHEFS_BTREE_JOURNAL_ITER_H
4
5#include "bkey.h"
6
7struct journal_iter {
8 struct list_head list;
9 enum btree_id btree_id;
10 unsigned level;
11 size_t idx;
12 struct journal_keys *keys;
13};
14
15/*
16 * Iterate over keys in the btree, with keys from the journal overlaid on top:
17 */
18
19struct btree_and_journal_iter {
20 struct btree_trans *trans;
21 struct btree *b;
22 struct btree_node_iter node_iter;
23 struct bkey unpacked;
24
25 struct journal_iter journal;
26 struct bpos pos;
27 bool at_end;
28 bool prefetch;
29};
30
31static inline int __journal_key_cmp(enum btree_id l_btree_id,
32 unsigned l_level,
33 struct bpos l_pos,
34 const struct journal_key *r)
35{
36 return (cmp_int(l_btree_id, r->btree_id) ?:
37 cmp_int(l_level, r->level) ?:
38 bpos_cmp(l_pos, r->k->k.p));
39}
40
41static inline int journal_key_cmp(const struct journal_key *l, const struct journal_key *r)
42{
43 return __journal_key_cmp(l->btree_id, l->level, l->k->k.p, r);
44}
45
46struct bkey_i *bch2_journal_keys_peek_upto(struct bch_fs *, enum btree_id,
47 unsigned, struct bpos, struct bpos, size_t *);
48struct bkey_i *bch2_journal_keys_peek_slot(struct bch_fs *, enum btree_id,
49 unsigned, struct bpos);
50
51int bch2_btree_and_journal_iter_prefetch(struct btree_trans *, struct btree_path *,
52 struct btree_and_journal_iter *);
53
54int bch2_journal_key_insert_take(struct bch_fs *, enum btree_id,
55 unsigned, struct bkey_i *);
56int bch2_journal_key_insert(struct bch_fs *, enum btree_id,
57 unsigned, struct bkey_i *);
58int bch2_journal_key_delete(struct bch_fs *, enum btree_id,
59 unsigned, struct bpos);
60bool bch2_key_deleted_in_journal(struct btree_trans *, enum btree_id, unsigned, struct bpos);
61void bch2_journal_key_overwritten(struct bch_fs *, enum btree_id, unsigned, struct bpos);
62
63void bch2_btree_and_journal_iter_advance(struct btree_and_journal_iter *);
64struct bkey_s_c bch2_btree_and_journal_iter_peek(struct btree_and_journal_iter *);
65
66void bch2_btree_and_journal_iter_exit(struct btree_and_journal_iter *);
67void __bch2_btree_and_journal_iter_init_node_iter(struct btree_trans *,
68 struct btree_and_journal_iter *, struct btree *,
69 struct btree_node_iter, struct bpos);
70void bch2_btree_and_journal_iter_init_node_iter(struct btree_trans *,
71 struct btree_and_journal_iter *, struct btree *);
72
73void bch2_journal_keys_put(struct bch_fs *);
74
75static inline void bch2_journal_keys_put_initial(struct bch_fs *c)
76{
77 if (c->journal_keys.initial_ref_held)
78 bch2_journal_keys_put(c);
79 c->journal_keys.initial_ref_held = false;
80}
81
82void bch2_journal_entries_free(struct bch_fs *);
83
84int bch2_journal_keys_sort(struct bch_fs *);
85
86void bch2_shoot_down_journal_keys(struct bch_fs *, enum btree_id,
87 unsigned, unsigned,
88 struct bpos, struct bpos);
89
90void bch2_journal_keys_dump(struct bch_fs *);
91
92#endif /* _BCACHEFS_BTREE_JOURNAL_ITER_H */