1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_BTREE_KEY_CACHE_H
3 #define _BCACHEFS_BTREE_KEY_CACHE_H
4
bch2_nr_btree_keys_need_flush(struct bch_fs * c)5 static inline size_t bch2_nr_btree_keys_need_flush(struct bch_fs *c)
6 {
7 size_t nr_dirty = atomic_long_read(&c->btree_key_cache.nr_dirty);
8 size_t nr_keys = atomic_long_read(&c->btree_key_cache.nr_keys);
9 size_t max_dirty = 1024 + nr_keys / 2;
10
11 return max_t(ssize_t, 0, nr_dirty - max_dirty);
12 }
13
__bch2_btree_key_cache_must_wait(struct bch_fs * c)14 static inline ssize_t __bch2_btree_key_cache_must_wait(struct bch_fs *c)
15 {
16 size_t nr_dirty = atomic_long_read(&c->btree_key_cache.nr_dirty);
17 size_t nr_keys = atomic_long_read(&c->btree_key_cache.nr_keys);
18 size_t max_dirty = 4096 + (nr_keys * 3) / 4;
19
20 return nr_dirty - max_dirty;
21 }
22
bch2_btree_key_cache_must_wait(struct bch_fs * c)23 static inline bool bch2_btree_key_cache_must_wait(struct bch_fs *c)
24 {
25 return __bch2_btree_key_cache_must_wait(c) > 0;
26 }
27
bch2_btree_key_cache_wait_done(struct bch_fs * c)28 static inline bool bch2_btree_key_cache_wait_done(struct bch_fs *c)
29 {
30 size_t nr_dirty = atomic_long_read(&c->btree_key_cache.nr_dirty);
31 size_t nr_keys = atomic_long_read(&c->btree_key_cache.nr_keys);
32 size_t max_dirty = 2048 + (nr_keys * 5) / 8;
33
34 return nr_dirty <= max_dirty;
35 }
36
37 int bch2_btree_key_cache_journal_flush(struct journal *,
38 struct journal_entry_pin *, u64);
39
40 struct bkey_cached *
41 bch2_btree_key_cache_find(struct bch_fs *, enum btree_id, struct bpos);
42
43 int bch2_btree_path_traverse_cached(struct btree_trans *, struct btree_path *,
44 unsigned);
45
46 bool bch2_btree_insert_key_cached(struct btree_trans *, unsigned,
47 struct btree_insert_entry *);
48 void bch2_btree_key_cache_drop(struct btree_trans *,
49 struct btree_path *);
50
51 void bch2_fs_btree_key_cache_exit(struct btree_key_cache *);
52 void bch2_fs_btree_key_cache_init_early(struct btree_key_cache *);
53 int bch2_fs_btree_key_cache_init(struct btree_key_cache *);
54
55 void bch2_btree_key_cache_to_text(struct printbuf *, struct btree_key_cache *);
56
57 void bch2_btree_key_cache_exit(void);
58 int __init bch2_btree_key_cache_init(void);
59
60 #endif /* _BCACHEFS_BTREE_KEY_CACHE_H */
61