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7 #include "buckets.h" 8 #include "debug.h" 9 #include "super.h" 10 11 enum bkey_invalid_flags; 12 13 /* How out of date a pointer gen is allowed to be: */ 14 #define BUCKET_GC_GEN_MAX 96U 15 16 static inline bool bch2_dev_bucket_exists(struct bch_fs *c, struct bpos pos) 17 { 18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 unsigned bch2_bucket_sectors(struct bch_alloc_v4 a) 75 { 76 return a.dirty_sectors + a.cached_sectors; 77 } 78 79 static inline unsigned bch2_bucket_sectors_dirty(struct bch_alloc_v4 a) 80 { 81 return a.dirty_sectors; 82 } 83 84 static inline unsigned bch2_bucket_sectors_fragmented(struct bch_dev *ca, 85 struct bch_alloc_v4 a) 86 { 87 int d = bch2_bucket_sectors_dirty(a); 88 89 return d ? max(0, ca->mi.bucket_size - d) : 0; 90 } 91 92 static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a) 93 { 94 return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0; 95 } 96 97 #define DATA_TYPES_MOVABLE \ 98 ((1U << BCH_DATA_btree)| \ 99 (1U << BCH_DATA_user)| \ 100 (1U << BCH_DATA_stripe)) 101 102 static inline bool data_type_movable(enum bch_data_type type) 103 { 104 return (1U << type) & DATA_TYPES_MOVABLE; 105 } 106 107 static inline u64 alloc_lru_idx_fragmentation(struct bch_alloc_v4 a, 108 struct bch_dev *ca) 109 { 110 if (!data_type_movable(a.data_type) || 111 !bch2_bucket_sectors_fragmented(ca, a)) 112 return 0; 113 114 u64 d = bch2_bucket_sectors_dirty(a); 115 return div_u64(d * (1ULL << 31), ca->mi.bucket_size); 116 } 117 118 static inline u64 alloc_freespace_genbits(struct bch_alloc_v4 a) 119 { 120 return ((u64) alloc_gc_gen(a) >> 4) << 56; 121 } 122 123 static inline struct bpos alloc_freespace_pos(struct bpos pos, struct bch_alloc_v4 a) 124 { 125 pos.offset |= alloc_freespace_genbits(a); 126 return pos; 127 } 128 129 static inline unsigned alloc_v4_u64s(const struct bch_alloc_v4 *a) 130 { 131 unsigned ret = (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?: 132 BCH_ALLOC_V4_U64s_V0) + 133 BCH_ALLOC_V4_NR_BACKPOINTERS(a) * 134 (sizeof(struct bch_backpointer) / sizeof(u64)); 135 136 BUG_ON(ret > U8_MAX - BKEY_U64s); 137 return ret; 138 } 139 140 static inline void set_alloc_v4_u64s(struct bkey_i_alloc_v4 *a) 141 { 142 set_bkey_val_u64s(&a->k, alloc_v4_u64s(&a->v)); 143 } 144 145 struct bkey_i_alloc_v4 * 146 bch2_trans_start_alloc_update(struct btree_trans *, struct btree_iter *, struct bpos); 147 148 void __bch2_alloc_to_v4(struct bkey_s_c, struct bch_alloc_v4 *); 149 150 static inline const struct bch_alloc_v4 *bch2_alloc_to_v4(struct bkey_s_c k, struct bch_alloc_v4 *convert) 151 { 152 const struct bch_alloc_v4 *ret; 153 154 if (unlikely(k.k->type != KEY_TYPE_alloc_v4)) 155 goto slowpath; 156 157 ret = bkey_s_c_to_alloc_v4(k).v; 158 if (BCH_ALLOC_V4_BACKPOINTERS_START(ret) != BCH_ALLOC_V4_U64s) 159 goto slowpath; 160 161 return ret; 162 slowpath: 163 __bch2_alloc_to_v4(k, convert); 164 return convert; 165 } 166 167 struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *, struct bkey_s_c); 168 169 int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int); 170 171 int bch2_alloc_v1_invalid(struct bch_fs *, struct bkey_s_c, 172 enum bkey_invalid_flags, struct printbuf *); 173 int bch2_alloc_v2_invalid(struct bch_fs *, struct bkey_s_c, 174 enum bkey_invalid_flags, struct printbuf *); 175 int bch2_alloc_v3_invalid(struct bch_fs *, struct bkey_s_c, 176 enum bkey_invalid_flags, struct printbuf *); 177 int bch2_alloc_v4_invalid(struct bch_fs *, struct bkey_s_c, 178 enum bkey_invalid_flags, struct printbuf *); 179 void bch2_alloc_v4_swab(struct bkey_s); 180 void bch2_alloc_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 181 182 #define bch2_bkey_ops_alloc ((struct bkey_ops) { \ 183 .key_invalid = bch2_alloc_v1_invalid, \ 184 .val_to_text = bch2_alloc_to_text, \ 185 .trigger = bch2_trigger_alloc, \ 186 .min_val_size = 8, \ 187 }) 188 189 #define bch2_bkey_ops_alloc_v2 ((struct bkey_ops) { \ 190 .key_invalid = bch2_alloc_v2_invalid, \ 191 .val_to_text = bch2_alloc_to_text, \ 192 .trigger = bch2_trigger_alloc, \ 193 .min_val_size = 8, \ 194 }) 195 196 #define bch2_bkey_ops_alloc_v3 ((struct bkey_ops) { \ 197 .key_invalid = bch2_alloc_v3_invalid, \ 198 .val_to_text = bch2_alloc_to_text, \ 199 .trigger = bch2_trigger_alloc, \ 200 .min_val_size = 16, \ 201 }) 202 203 #define bch2_bkey_ops_alloc_v4 ((struct bkey_ops) { \ 204 .key_invalid = bch2_alloc_v4_invalid, \ 205 .val_to_text = bch2_alloc_to_text, \ 206 .swab = bch2_alloc_v4_swab, \ 207 .trigger = bch2_trigger_alloc, \ 208 .min_val_size = 48, \ 209 }) 210 211 int bch2_bucket_gens_invalid(struct bch_fs *, struct bkey_s_c, 212 enum bkey_invalid_flags, struct printbuf *); 213 void bch2_bucket_gens_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 214 215 #define bch2_bkey_ops_bucket_gens ((struct bkey_ops) { \ 216 .key_invalid = bch2_bucket_gens_invalid, \ 217 .val_to_text = bch2_bucket_gens_to_text, \ 218 }) 219 220 int bch2_bucket_gens_init(struct bch_fs *); 221 222 static inline bool bkey_is_alloc(const struct bkey *k) 223 { 224 return k->type == KEY_TYPE_alloc || 225 k->type == KEY_TYPE_alloc_v2 || 226 k->type == KEY_TYPE_alloc_v3; 227 } 228 229 int bch2_alloc_read(struct bch_fs *); 230 231 int bch2_trigger_alloc(struct btree_trans *, enum btree_id, unsigned, 232 struct bkey_s_c, struct bkey_s, unsigned); 233 int bch2_check_alloc_info(struct bch_fs *); 234 int bch2_check_alloc_to_lru_refs(struct bch_fs *); 235 void bch2_do_discards(struct bch_fs *); 236 237 static inline u64 should_invalidate_buckets(struct bch_dev *ca, 238 struct bch_dev_usage u) 239 { 240 u64 want_free = ca->mi.nbuckets >> 7; 241 u64 free = max_t(s64, 0, 242 u.d[BCH_DATA_free].buckets 243 + u.d[BCH_DATA_need_discard].buckets 244 - bch2_dev_buckets_reserved(ca, BCH_WATERMARK_stripe)); 245 246 return clamp_t(s64, want_free - free, 0, u.d[BCH_DATA_cached].buckets); 247 } 248 249 void bch2_do_invalidates(struct bch_fs *); 250 251 static inline struct bch_backpointer *alloc_v4_backpointers(struct bch_alloc_v4 *a) 252 { 253 return (void *) ((u64 *) &a->v + 254 (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?: 255 BCH_ALLOC_V4_U64s_V0)); 256 } 257 258 static inline const struct bch_backpointer *alloc_v4_backpointers_c(const struct bch_alloc_v4 *a) 259 { 260 return (void *) ((u64 *) &a->v + BCH_ALLOC_V4_BACKPOINTERS_START(a)); 261 } 262 263 int bch2_dev_freespace_init(struct bch_fs *, struct bch_dev *, u64, u64); 264 int bch2_fs_freespace_init(struct bch_fs *); 265 266 void bch2_recalc_capacity(struct bch_fs *); 267 u64 bch2_min_rw_member_capacity(struct bch_fs *); 268 269 void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *); 270 void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *); 271 272 void bch2_fs_allocator_background_exit(struct bch_fs *); 273 void bch2_fs_allocator_background_init(struct bch_fs *); 274 275 #endif /* _BCACHEFS_ALLOC_BACKGROUND_H */ 276