[linux-block.git] / fs / bcachefs / lru.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_LRU_H
#define _BCACHEFS_LRU_H

#define LRU_TIME_BITS	48
#define LRU_TIME_MAX	((1ULL << LRU_TIME_BITS) - 1)

static inline u64 lru_pos_id(struct bpos pos)
{
	return pos.inode >> LRU_TIME_BITS;
}

static inline u64 lru_pos_time(struct bpos pos)
{
	return pos.inode & ~(~0ULL << LRU_TIME_BITS);
}

static inline struct bpos lru_pos(u16 lru_id, u64 dev_bucket, u64 time)
{
	struct bpos pos = POS(((u64) lru_id << LRU_TIME_BITS)|time, dev_bucket);

	EBUG_ON(time > LRU_TIME_MAX);
	EBUG_ON(lru_pos_id(pos) != lru_id);
	EBUG_ON(lru_pos_time(pos) != time);
	EBUG_ON(pos.offset != dev_bucket);

	return pos;
}

#define BCH_LRU_TYPES()		\
	x(read)			\
	x(fragmentation)

enum bch_lru_type {
#define x(n) BCH_LRU_##n,
	BCH_LRU_TYPES()
#undef x
};

#define BCH_LRU_FRAGMENTATION_START	((1U << 16) - 1)

static inline enum bch_lru_type lru_type(struct bkey_s_c l)
{
	u16 lru_id = l.k->p.inode >> 48;

	if (lru_id == BCH_LRU_FRAGMENTATION_START)
		return BCH_LRU_fragmentation;
	return BCH_LRU_read;
}

int bch2_lru_invalid(const struct bch_fs *, struct bkey_s_c,
		     enum bkey_invalid_flags, struct printbuf *);
void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);

void bch2_lru_pos_to_text(struct printbuf *, struct bpos);

#define bch2_bkey_ops_lru ((struct bkey_ops) {	\
	.key_invalid	= bch2_lru_invalid,	\
	.val_to_text	= bch2_lru_to_text,	\
	.min_val_size	= 8,			\
})

int bch2_lru_del(struct btree_trans *, u16, u64, u64);
int bch2_lru_set(struct btree_trans *, u16, u64, u64);
int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);

int bch2_check_lrus(struct bch_fs *);

#endif /* _BCACHEFS_LRU_H */
Commit	Line	Data
d326ab2f KO	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _BCACHEFS_LRU_H
	3	#define _BCACHEFS_LRU_H
	4
83f33d68 KO	5	#define LRU_TIME_BITS 48
	6	#define LRU_TIME_MAX ((1ULL << LRU_TIME_BITS) - 1)
	7
83f33d68 KO	8	static inline u64 lru_pos_id(struct bpos pos)
	9	{
	10	return pos.inode >> LRU_TIME_BITS;
	11	}
	12
	13	static inline u64 lru_pos_time(struct bpos pos)
	14	{
	15	return pos.inode & ~(~0ULL << LRU_TIME_BITS);
	16	}
	17
8e992c6c KO	18	static inline struct bpos lru_pos(u16 lru_id, u64 dev_bucket, u64 time)
	19	{
	20	struct bpos pos = POS(((u64) lru_id << LRU_TIME_BITS)\|time, dev_bucket);
	21
	22	EBUG_ON(time > LRU_TIME_MAX);
	23	EBUG_ON(lru_pos_id(pos) != lru_id);
	24	EBUG_ON(lru_pos_time(pos) != time);
	25	EBUG_ON(pos.offset != dev_bucket);
	26
	27	return pos;
	28	}
	29
80c33085 KO	30	#define BCH_LRU_TYPES() \
	31	x(read) \
	32	x(fragmentation)
	33
	34	enum bch_lru_type {
	35	#define x(n) BCH_LRU_##n,
	36	BCH_LRU_TYPES()
	37	#undef x
	38	};
	39
	40	#define BCH_LRU_FRAGMENTATION_START ((1U << 16) - 1)
	41
	42	static inline enum bch_lru_type lru_type(struct bkey_s_c l)
	43	{
	44	u16 lru_id = l.k->p.inode >> 48;
	45
	46	if (lru_id == BCH_LRU_FRAGMENTATION_START)
	47	return BCH_LRU_fragmentation;
	48	return BCH_LRU_read;
	49	}
	50
8726dc93 KO	51	int bch2_lru_invalid(const struct bch_fs *, struct bkey_s_c,
8726dc93 KO	52	enum bkey_invalid_flags, struct printbuf *);
d326ab2f KO	53	void bch2_lru_to_text(struct printbuf , struct bch_fs , struct bkey_s_c);
d326ab2f KO	54
629a21b6 KO	55	void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
629a21b6 KO	56
a1019576	57	#define bch2_bkey_ops_lru ((struct bkey_ops) { \
d326ab2f KO	58	.key_invalid = bch2_lru_invalid, \
d326ab2f KO	59	.val_to_text = bch2_lru_to_text, \
174f930b	60	.min_val_size = 8, \
a1019576	61	})
d326ab2f	62
83f33d68 KO	63	int bch2_lru_del(struct btree_trans *, u16, u64, u64);
	64	int bch2_lru_set(struct btree_trans *, u16, u64, u64);
	65	int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
d326ab2f	66
d8a161ad	67	int bch2_check_lrus(struct bch_fs *);
5add07d5	68
d326ab2f	69	#endif /* _BCACHEFS_LRU_H */