1 /* SPDX-License-Identifier: GPL-2.0 */
6 #include "buckets_types.h"
7 #include "extents_types.h"
9 int bch2_stripe_invalid(const struct bch_fs *, struct bkey_s_c,
10 unsigned, struct printbuf *);
11 void bch2_stripe_to_text(struct printbuf *, struct bch_fs *,
14 #define bch2_bkey_ops_stripe ((struct bkey_ops) { \
15 .key_invalid = bch2_stripe_invalid, \
16 .val_to_text = bch2_stripe_to_text, \
17 .swab = bch2_ptr_swab, \
18 .trans_trigger = bch2_trans_mark_stripe, \
19 .atomic_trigger = bch2_mark_stripe, \
22 static inline unsigned stripe_csums_per_device(const struct bch_stripe *s)
24 return DIV_ROUND_UP(le16_to_cpu(s->sectors),
25 1 << s->csum_granularity_bits);
28 static inline unsigned stripe_csum_offset(const struct bch_stripe *s,
29 unsigned dev, unsigned csum_idx)
31 unsigned csum_bytes = bch_crc_bytes[s->csum_type];
33 return sizeof(struct bch_stripe) +
34 sizeof(struct bch_extent_ptr) * s->nr_blocks +
35 (dev * stripe_csums_per_device(s) + csum_idx) * csum_bytes;
38 static inline unsigned stripe_blockcount_offset(const struct bch_stripe *s,
41 return stripe_csum_offset(s, s->nr_blocks, 0) +
45 static inline unsigned stripe_blockcount_get(const struct bch_stripe *s,
48 return le16_to_cpup((void *) s + stripe_blockcount_offset(s, idx));
51 static inline void stripe_blockcount_set(struct bch_stripe *s,
52 unsigned idx, unsigned v)
54 __le16 *p = (void *) s + stripe_blockcount_offset(s, idx);
59 static inline unsigned stripe_val_u64s(const struct bch_stripe *s)
61 return DIV_ROUND_UP(stripe_blockcount_offset(s, s->nr_blocks),
65 static inline void *stripe_csum(struct bch_stripe *s,
66 unsigned block, unsigned csum_idx)
68 EBUG_ON(block >= s->nr_blocks);
69 EBUG_ON(csum_idx >= stripe_csums_per_device(s));
71 return (void *) s + stripe_csum_offset(s, block, csum_idx);
74 static inline struct bch_csum stripe_csum_get(struct bch_stripe *s,
75 unsigned block, unsigned csum_idx)
77 struct bch_csum csum = { 0 };
79 memcpy(&csum, stripe_csum(s, block, csum_idx), bch_crc_bytes[s->csum_type]);
83 static inline void stripe_csum_set(struct bch_stripe *s,
84 unsigned block, unsigned csum_idx,
87 memcpy(stripe_csum(s, block, csum_idx), &csum, bch_crc_bytes[s->csum_type]);
90 static inline bool __bch2_ptr_matches_stripe(const struct bch_extent_ptr *stripe_ptr,
91 const struct bch_extent_ptr *data_ptr,
94 return data_ptr->dev == stripe_ptr->dev &&
95 data_ptr->gen == stripe_ptr->gen &&
96 data_ptr->offset >= stripe_ptr->offset &&
97 data_ptr->offset < stripe_ptr->offset + sectors;
100 static inline bool bch2_ptr_matches_stripe(const struct bch_stripe *s,
101 struct extent_ptr_decoded p)
103 unsigned nr_data = s->nr_blocks - s->nr_redundant;
107 if (p.ec.block >= nr_data)
110 return __bch2_ptr_matches_stripe(&s->ptrs[p.ec.block], &p.ptr,
111 le16_to_cpu(s->sectors));
114 static inline bool bch2_ptr_matches_stripe_m(const struct gc_stripe *m,
115 struct extent_ptr_decoded p)
117 unsigned nr_data = m->nr_blocks - m->nr_redundant;
121 if (p.ec.block >= nr_data)
124 return __bch2_ptr_matches_stripe(&m->ptrs[p.ec.block], &p.ptr,
130 struct ec_stripe_buf {
131 /* might not be buffering the entire stripe: */
134 unsigned long valid[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
136 void *data[BCH_BKEY_PTRS_MAX];
139 struct bkey_i_stripe key;
144 struct ec_stripe_head;
152 struct ec_stripe_new {
154 struct ec_stripe_head *h;
156 struct list_head list;
158 struct hlist_node hash;
161 struct closure iodone;
163 atomic_t ref[STRIPE_REF_NR];
171 bool have_existing_stripe;
173 unsigned long blocks_gotten[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
174 unsigned long blocks_allocated[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
175 open_bucket_idx_t blocks[BCH_BKEY_PTRS_MAX];
176 struct disk_reservation res;
178 struct ec_stripe_buf new_stripe;
179 struct ec_stripe_buf existing_stripe;
182 struct ec_stripe_head {
183 struct list_head list;
189 enum alloc_reserve reserve;
191 struct bch_devs_mask devs;
192 unsigned nr_active_devs;
196 struct dev_stripe_state block_stripe;
197 struct dev_stripe_state parity_stripe;
199 struct ec_stripe_new *s;
202 int bch2_ec_read_extent(struct bch_fs *, struct bch_read_bio *);
204 void *bch2_writepoint_ec_buf(struct bch_fs *, struct write_point *);
206 void bch2_ec_bucket_cancel(struct bch_fs *, struct open_bucket *);
208 int bch2_ec_stripe_new_alloc(struct bch_fs *, struct ec_stripe_head *);
210 void bch2_ec_stripe_head_put(struct bch_fs *, struct ec_stripe_head *);
211 struct ec_stripe_head *bch2_ec_stripe_head_get(struct btree_trans *,
212 unsigned, unsigned, unsigned,
213 enum alloc_reserve, struct closure *);
215 void bch2_stripes_heap_update(struct bch_fs *, struct stripe *, size_t);
216 void bch2_stripes_heap_del(struct bch_fs *, struct stripe *, size_t);
217 void bch2_stripes_heap_insert(struct bch_fs *, struct stripe *, size_t);
219 void bch2_do_stripe_deletes(struct bch_fs *);
220 void bch2_ec_do_stripe_creates(struct bch_fs *);
221 void bch2_ec_stripe_new_free(struct bch_fs *, struct ec_stripe_new *);
223 static inline void ec_stripe_new_get(struct ec_stripe_new *s,
224 enum ec_stripe_ref ref)
226 atomic_inc(&s->ref[ref]);
229 static inline void ec_stripe_new_put(struct bch_fs *c, struct ec_stripe_new *s,
230 enum ec_stripe_ref ref)
232 BUG_ON(atomic_read(&s->ref[ref]) <= 0);
234 if (atomic_dec_and_test(&s->ref[ref]))
236 case STRIPE_REF_stripe:
237 bch2_ec_stripe_new_free(c, s);
240 bch2_ec_do_stripe_creates(c);
247 void bch2_ec_stop_dev(struct bch_fs *, struct bch_dev *);
248 void bch2_fs_ec_stop(struct bch_fs *);
249 void bch2_fs_ec_flush(struct bch_fs *);
251 int bch2_stripes_read(struct bch_fs *);
253 void bch2_stripes_heap_to_text(struct printbuf *, struct bch_fs *);
254 void bch2_new_stripes_to_text(struct printbuf *, struct bch_fs *);
256 void bch2_fs_ec_exit(struct bch_fs *);
257 void bch2_fs_ec_init_early(struct bch_fs *);
258 int bch2_fs_ec_init(struct bch_fs *);
260 #endif /* _BCACHEFS_EC_H */