1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_ALLOC_BACKGROUND_H
3 #define _BCACHEFS_ALLOC_BACKGROUND_H
6 #include "alloc_types.h"
11 /* How out of date a pointer gen is allowed to be: */
12 #define BUCKET_GC_GEN_MAX 96U
14 static inline bool bch2_dev_bucket_exists(struct bch_fs *c, struct bpos pos)
18 if (!bch2_dev_exists2(c, pos.inode))
21 ca = bch_dev_bkey_exists(c, pos.inode);
22 return pos.offset >= ca->mi.first_bucket &&
23 pos.offset < ca->mi.nbuckets;
26 static inline u8 alloc_gc_gen(struct bch_alloc_v4 a)
28 return a.gen - a.oldest_gen;
31 static inline enum bch_data_type __alloc_data_type(u32 dirty_sectors,
34 struct bch_alloc_v4 a,
35 enum bch_data_type data_type)
40 return BCH_DATA_stripe;
42 return BCH_DATA_cached;
43 if (BCH_ALLOC_V4_NEED_DISCARD(&a))
44 return BCH_DATA_need_discard;
45 if (alloc_gc_gen(a) >= BUCKET_GC_GEN_MAX)
46 return BCH_DATA_need_gc_gens;
50 static inline enum bch_data_type alloc_data_type(struct bch_alloc_v4 a,
51 enum bch_data_type data_type)
53 return __alloc_data_type(a.dirty_sectors, a.cached_sectors,
54 a.stripe, a, data_type);
57 static inline u64 alloc_lru_idx(struct bch_alloc_v4 a)
59 return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0;
62 static inline u64 alloc_freespace_genbits(struct bch_alloc_v4 a)
64 return ((u64) alloc_gc_gen(a) >> 4) << 56;
67 static inline struct bpos alloc_freespace_pos(struct bpos pos, struct bch_alloc_v4 a)
69 pos.offset |= alloc_freespace_genbits(a);
73 static inline unsigned alloc_v4_u64s(const struct bch_alloc_v4 *a)
75 unsigned ret = (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?:
76 BCH_ALLOC_V4_U64s_V0) +
77 BCH_ALLOC_V4_NR_BACKPOINTERS(a) *
78 (sizeof(struct bch_backpointer) / sizeof(u64));
80 BUG_ON(ret > U8_MAX - BKEY_U64s);
84 static inline void set_alloc_v4_u64s(struct bkey_i_alloc_v4 *a)
86 set_bkey_val_u64s(&a->k, alloc_v4_u64s(&a->v));
89 struct bkey_i_alloc_v4 *
90 bch2_trans_start_alloc_update(struct btree_trans *, struct btree_iter *, struct bpos);
92 void bch2_alloc_to_v4(struct bkey_s_c, struct bch_alloc_v4 *);
93 struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *, struct bkey_s_c);
95 int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int);
97 #define ALLOC_SCAN_BATCH(ca) max_t(size_t, 1, (ca)->mi.nbuckets >> 9)
99 int bch2_alloc_v1_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
100 int bch2_alloc_v2_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
101 int bch2_alloc_v3_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
102 int bch2_alloc_v4_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
103 void bch2_alloc_v4_swab(struct bkey_s);
104 void bch2_alloc_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
106 #define bch2_bkey_ops_alloc (struct bkey_ops) { \
107 .key_invalid = bch2_alloc_v1_invalid, \
108 .val_to_text = bch2_alloc_to_text, \
109 .trans_trigger = bch2_trans_mark_alloc, \
110 .atomic_trigger = bch2_mark_alloc, \
113 #define bch2_bkey_ops_alloc_v2 (struct bkey_ops) { \
114 .key_invalid = bch2_alloc_v2_invalid, \
115 .val_to_text = bch2_alloc_to_text, \
116 .trans_trigger = bch2_trans_mark_alloc, \
117 .atomic_trigger = bch2_mark_alloc, \
120 #define bch2_bkey_ops_alloc_v3 (struct bkey_ops) { \
121 .key_invalid = bch2_alloc_v3_invalid, \
122 .val_to_text = bch2_alloc_to_text, \
123 .trans_trigger = bch2_trans_mark_alloc, \
124 .atomic_trigger = bch2_mark_alloc, \
127 #define bch2_bkey_ops_alloc_v4 (struct bkey_ops) { \
128 .key_invalid = bch2_alloc_v4_invalid, \
129 .val_to_text = bch2_alloc_to_text, \
130 .swab = bch2_alloc_v4_swab, \
131 .trans_trigger = bch2_trans_mark_alloc, \
132 .atomic_trigger = bch2_mark_alloc, \
135 static inline bool bkey_is_alloc(const struct bkey *k)
137 return k->type == KEY_TYPE_alloc ||
138 k->type == KEY_TYPE_alloc_v2 ||
139 k->type == KEY_TYPE_alloc_v3;
142 int bch2_alloc_read(struct bch_fs *);
144 int bch2_trans_mark_alloc(struct btree_trans *, enum btree_id, unsigned,
145 struct bkey_s_c, struct bkey_i *, unsigned);
146 int bch2_check_alloc_info(struct bch_fs *);
147 int bch2_check_alloc_to_lru_refs(struct bch_fs *);
148 void bch2_do_discards(struct bch_fs *);
150 static inline u64 should_invalidate_buckets(struct bch_dev *ca,
151 struct bch_dev_usage u)
153 u64 want_free = ca->mi.nbuckets >> 7;
154 u64 free = max_t(s64, 0,
155 u.d[BCH_DATA_free].buckets
156 + u.d[BCH_DATA_need_discard].buckets
157 - bch2_dev_buckets_reserved(ca, RESERVE_none));
159 return clamp_t(s64, want_free - free, 0, u.d[BCH_DATA_cached].buckets);
162 void bch2_do_invalidates(struct bch_fs *);
164 static inline struct bch_backpointer *alloc_v4_backpointers(struct bch_alloc_v4 *a)
166 return (void *) ((u64 *) &a->v + BCH_ALLOC_V4_BACKPOINTERS_START(a));
169 static inline const struct bch_backpointer *alloc_v4_backpointers_c(const struct bch_alloc_v4 *a)
171 return (void *) ((u64 *) &a->v + BCH_ALLOC_V4_BACKPOINTERS_START(a));
174 int bch2_fs_freespace_init(struct bch_fs *);
176 void bch2_recalc_capacity(struct bch_fs *);
178 void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *);
179 void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *);
181 void bch2_fs_allocator_background_init(struct bch_fs *);
183 #endif /* _BCACHEFS_ALLOC_BACKGROUND_H */