1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_ALLOC_BACKGROUND_H 3 #define _BCACHEFS_ALLOC_BACKGROUND_H 4 5 #include "bcachefs.h" 6 #include "alloc_types.h" 7 #include "buckets.h" 8 #include "debug.h" 9 #include "super.h" 10 11 enum bkey_invalid_flags; 12 13 /* How out of date a pointer gen is allowed to be: */ 14 #define BUCKET_GC_GEN_MAX 96U 15 16 static inline bool bch2_dev_bucket_exists(struct bch_fs *c, struct bpos pos) 17 { 18 struct bch_dev *ca; 19 20 if (!bch2_dev_exists2(c, pos.inode)) 21 return false; 22 23 ca = bch_dev_bkey_exists(c, pos.inode); 24 return pos.offset >= ca->mi.first_bucket && 25 pos.offset < ca->mi.nbuckets; 26 } 27 28 static inline u64 bucket_to_u64(struct bpos bucket) 29 { 30 return (bucket.inode << 48) | bucket.offset; 31 } 32 33 static inline struct bpos u64_to_bucket(u64 bucket) 34 { 35 return POS(bucket >> 48, bucket & ~(~0ULL << 48)); 36 } 37 38 static inline u8 alloc_gc_gen(struct bch_alloc_v4 a) 39 { 40 return a.gen - a.oldest_gen; 41 } 42 43 static inline enum bch_data_type __alloc_data_type(u32 dirty_sectors, 44 u32 cached_sectors, 45 u32 stripe, 46 struct bch_alloc_v4 a, 47 enum bch_data_type data_type) 48 { 49 if (stripe) 50 return data_type == BCH_DATA_parity ? data_type : BCH_DATA_stripe; 51 if (dirty_sectors) 52 return data_type; 53 if (cached_sectors) 54 return BCH_DATA_cached; 55 if (BCH_ALLOC_V4_NEED_DISCARD(&a)) 56 return BCH_DATA_need_discard; 57 if (alloc_gc_gen(a) >= BUCKET_GC_GEN_MAX) 58 return BCH_DATA_need_gc_gens; 59 return BCH_DATA_free; 60 } 61 62 static inline enum bch_data_type alloc_data_type(struct bch_alloc_v4 a, 63 enum bch_data_type data_type) 64 { 65 return __alloc_data_type(a.dirty_sectors, a.cached_sectors, 66 a.stripe, a, data_type); 67 } 68 69 static inline enum bch_data_type bucket_data_type(enum bch_data_type data_type) 70 { 71 return data_type == BCH_DATA_stripe ? BCH_DATA_user : data_type; 72 } 73 74 static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a) 75 { 76 return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0; 77 } 78 79 #define DATA_TYPES_MOVABLE \ 80 ((1U << BCH_DATA_btree)| \ 81 (1U << BCH_DATA_user)| \ 82 (1U << BCH_DATA_stripe)) 83 84 static inline bool data_type_movable(enum bch_data_type type) 85 { 86 return (1U << type) & DATA_TYPES_MOVABLE; 87 } 88 89 static inline u64 alloc_lru_idx_fragmentation(struct bch_alloc_v4 a, 90 struct bch_dev *ca) 91 { 92 if (!data_type_movable(a.data_type) || 93 a.dirty_sectors >= ca->mi.bucket_size) 94 return 0; 95 96 return div_u64((u64) a.dirty_sectors * (1ULL << 31), ca->mi.bucket_size); 97 } 98 99 static inline u64 alloc_freespace_genbits(struct bch_alloc_v4 a) 100 { 101 return ((u64) alloc_gc_gen(a) >> 4) << 56; 102 } 103 104 static inline struct bpos alloc_freespace_pos(struct bpos pos, struct bch_alloc_v4 a) 105 { 106 pos.offset |= alloc_freespace_genbits(a); 107 return pos; 108 } 109 110 static inline unsigned alloc_v4_u64s(const struct bch_alloc_v4 *a) 111 { 112 unsigned ret = (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?: 113 BCH_ALLOC_V4_U64s_V0) + 114 BCH_ALLOC_V4_NR_BACKPOINTERS(a) * 115 (sizeof(struct bch_backpointer) / sizeof(u64)); 116 117 BUG_ON(ret > U8_MAX - BKEY_U64s); 118 return ret; 119 } 120 121 static inline void set_alloc_v4_u64s(struct bkey_i_alloc_v4 *a) 122 { 123 set_bkey_val_u64s(&a->k, alloc_v4_u64s(&a->v)); 124 } 125 126 struct bkey_i_alloc_v4 * 127 bch2_trans_start_alloc_update(struct btree_trans *, struct btree_iter *, struct bpos); 128 129 void __bch2_alloc_to_v4(struct bkey_s_c, struct bch_alloc_v4 *); 130 131 static inline const struct bch_alloc_v4 *bch2_alloc_to_v4(struct bkey_s_c k, struct bch_alloc_v4 *convert) 132 { 133 const struct bch_alloc_v4 *ret; 134 135 if (unlikely(k.k->type != KEY_TYPE_alloc_v4)) 136 goto slowpath; 137 138 ret = bkey_s_c_to_alloc_v4(k).v; 139 if (BCH_ALLOC_V4_BACKPOINTERS_START(ret) != BCH_ALLOC_V4_U64s) 140 goto slowpath; 141 142 return ret; 143 slowpath: 144 __bch2_alloc_to_v4(k, convert); 145 return convert; 146 } 147 148 struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *, struct bkey_s_c); 149 150 int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int); 151 152 int bch2_alloc_v1_invalid(struct bch_fs *, struct bkey_s_c, 153 enum bkey_invalid_flags, struct printbuf *); 154 int bch2_alloc_v2_invalid(struct bch_fs *, struct bkey_s_c, 155 enum bkey_invalid_flags, struct printbuf *); 156 int bch2_alloc_v3_invalid(struct bch_fs *, struct bkey_s_c, 157 enum bkey_invalid_flags, struct printbuf *); 158 int bch2_alloc_v4_invalid(struct bch_fs *, struct bkey_s_c, 159 enum bkey_invalid_flags, struct printbuf *); 160 void bch2_alloc_v4_swab(struct bkey_s); 161 void bch2_alloc_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 162 163 #define bch2_bkey_ops_alloc ((struct bkey_ops) { \ 164 .key_invalid = bch2_alloc_v1_invalid, \ 165 .val_to_text = bch2_alloc_to_text, \ 166 .trans_trigger = bch2_trans_mark_alloc, \ 167 .atomic_trigger = bch2_mark_alloc, \ 168 .min_val_size = 8, \ 169 }) 170 171 #define bch2_bkey_ops_alloc_v2 ((struct bkey_ops) { \ 172 .key_invalid = bch2_alloc_v2_invalid, \ 173 .val_to_text = bch2_alloc_to_text, \ 174 .trans_trigger = bch2_trans_mark_alloc, \ 175 .atomic_trigger = bch2_mark_alloc, \ 176 .min_val_size = 8, \ 177 }) 178 179 #define bch2_bkey_ops_alloc_v3 ((struct bkey_ops) { \ 180 .key_invalid = bch2_alloc_v3_invalid, \ 181 .val_to_text = bch2_alloc_to_text, \ 182 .trans_trigger = bch2_trans_mark_alloc, \ 183 .atomic_trigger = bch2_mark_alloc, \ 184 .min_val_size = 16, \ 185 }) 186 187 #define bch2_bkey_ops_alloc_v4 ((struct bkey_ops) { \ 188 .key_invalid = bch2_alloc_v4_invalid, \ 189 .val_to_text = bch2_alloc_to_text, \ 190 .swab = bch2_alloc_v4_swab, \ 191 .trans_trigger = bch2_trans_mark_alloc, \ 192 .atomic_trigger = bch2_mark_alloc, \ 193 .min_val_size = 48, \ 194 }) 195 196 int bch2_bucket_gens_invalid(struct bch_fs *, struct bkey_s_c, 197 enum bkey_invalid_flags, struct printbuf *); 198 void bch2_bucket_gens_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 199 200 #define bch2_bkey_ops_bucket_gens ((struct bkey_ops) { \ 201 .key_invalid = bch2_bucket_gens_invalid, \ 202 .val_to_text = bch2_bucket_gens_to_text, \ 203 }) 204 205 int bch2_bucket_gens_init(struct bch_fs *); 206 207 static inline bool bkey_is_alloc(const struct bkey *k) 208 { 209 return k->type == KEY_TYPE_alloc || 210 k->type == KEY_TYPE_alloc_v2 || 211 k->type == KEY_TYPE_alloc_v3; 212 } 213 214 int bch2_alloc_read(struct bch_fs *); 215 216 int bch2_trans_mark_alloc(struct btree_trans *, enum btree_id, unsigned, 217 struct bkey_s_c, struct bkey_i *, unsigned); 218 int bch2_check_alloc_info(struct bch_fs *); 219 int bch2_check_alloc_to_lru_refs(struct bch_fs *); 220 void bch2_do_discards(struct bch_fs *); 221 222 static inline u64 should_invalidate_buckets(struct bch_dev *ca, 223 struct bch_dev_usage u) 224 { 225 u64 want_free = ca->mi.nbuckets >> 7; 226 u64 free = max_t(s64, 0, 227 u.d[BCH_DATA_free].buckets 228 + u.d[BCH_DATA_need_discard].buckets 229 - bch2_dev_buckets_reserved(ca, BCH_WATERMARK_stripe)); 230 231 return clamp_t(s64, want_free - free, 0, u.d[BCH_DATA_cached].buckets); 232 } 233 234 void bch2_do_invalidates(struct bch_fs *); 235 236 static inline struct bch_backpointer *alloc_v4_backpointers(struct bch_alloc_v4 *a) 237 { 238 return (void *) ((u64 *) &a->v + 239 (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?: 240 BCH_ALLOC_V4_U64s_V0)); 241 } 242 243 static inline const struct bch_backpointer *alloc_v4_backpointers_c(const struct bch_alloc_v4 *a) 244 { 245 return (void *) ((u64 *) &a->v + BCH_ALLOC_V4_BACKPOINTERS_START(a)); 246 } 247 248 int bch2_dev_freespace_init(struct bch_fs *, struct bch_dev *, u64, u64); 249 int bch2_fs_freespace_init(struct bch_fs *); 250 251 void bch2_recalc_capacity(struct bch_fs *); 252 u64 bch2_min_rw_member_capacity(struct bch_fs *); 253 254 void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *); 255 void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *); 256 257 void bch2_fs_allocator_background_init(struct bch_fs *); 258 259 #endif /* _BCACHEFS_ALLOC_BACKGROUND_H */ 260