1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_LRU_H 3 #define _BCACHEFS_LRU_H 4 5 #define LRU_TIME_BITS 48 6 #define LRU_TIME_MAX ((1ULL << LRU_TIME_BITS) - 1) 7 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 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 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 51 int bch2_lru_invalid(struct bch_fs *, struct bkey_s_c, 52 enum bkey_invalid_flags, struct printbuf *); 53 void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 54 55 void bch2_lru_pos_to_text(struct printbuf *, struct bpos); 56 57 #define bch2_bkey_ops_lru ((struct bkey_ops) { \ 58 .key_invalid = bch2_lru_invalid, \ 59 .val_to_text = bch2_lru_to_text, \ 60 .min_val_size = 8, \ 61 }) 62 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); 66 67 int bch2_check_lrus(struct bch_fs *); 68 69 #endif /* _BCACHEFS_LRU_H */ 70