1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Code for manipulating bucket marks for garbage collection.
5 * Copyright 2014 Datera, Inc.
11 #include "buckets_types.h"
13 #include "sb-members.h"
15 static inline size_t sector_to_bucket(const struct bch_dev *ca, sector_t s)
17 return div_u64(s, ca->mi.bucket_size);
20 static inline sector_t bucket_to_sector(const struct bch_dev *ca, size_t b)
22 return ((sector_t) b) * ca->mi.bucket_size;
25 static inline sector_t bucket_remainder(const struct bch_dev *ca, sector_t s)
29 div_u64_rem(s, ca->mi.bucket_size, &remainder);
33 static inline size_t sector_to_bucket_and_offset(const struct bch_dev *ca, sector_t s,
36 return div_u64_rem(s, ca->mi.bucket_size, offset);
39 #define for_each_bucket(_b, _buckets) \
40 for (_b = (_buckets)->b + (_buckets)->first_bucket; \
41 _b < (_buckets)->b + (_buckets)->nbuckets; _b++)
43 static inline void bucket_unlock(struct bucket *b)
45 smp_store_release(&b->lock, 0);
48 static inline void bucket_lock(struct bucket *b)
50 while (xchg(&b->lock, 1))
54 static inline struct bucket_array *gc_bucket_array(struct bch_dev *ca)
56 return rcu_dereference_check(ca->buckets_gc,
58 percpu_rwsem_is_held(&ca->fs->mark_lock) ||
59 lockdep_is_held(&ca->fs->gc_lock) ||
60 lockdep_is_held(&ca->bucket_lock));
63 static inline struct bucket *gc_bucket(struct bch_dev *ca, size_t b)
65 struct bucket_array *buckets = gc_bucket_array(ca);
67 BUG_ON(b < buckets->first_bucket || b >= buckets->nbuckets);
68 return buckets->b + b;
71 static inline struct bucket_gens *bucket_gens(struct bch_dev *ca)
73 return rcu_dereference_check(ca->bucket_gens,
75 percpu_rwsem_is_held(&ca->fs->mark_lock) ||
76 lockdep_is_held(&ca->fs->gc_lock) ||
77 lockdep_is_held(&ca->bucket_lock));
80 static inline u8 *bucket_gen(struct bch_dev *ca, size_t b)
82 struct bucket_gens *gens = bucket_gens(ca);
84 BUG_ON(b < gens->first_bucket || b >= gens->nbuckets);
88 static inline size_t PTR_BUCKET_NR(const struct bch_dev *ca,
89 const struct bch_extent_ptr *ptr)
91 return sector_to_bucket(ca, ptr->offset);
94 static inline struct bpos PTR_BUCKET_POS(const struct bch_fs *c,
95 const struct bch_extent_ptr *ptr)
97 struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
99 return POS(ptr->dev, PTR_BUCKET_NR(ca, ptr));
102 static inline struct bpos PTR_BUCKET_POS_OFFSET(const struct bch_fs *c,
103 const struct bch_extent_ptr *ptr,
106 struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
108 return POS(ptr->dev, sector_to_bucket_and_offset(ca, ptr->offset, bucket_offset));
111 static inline struct bucket *PTR_GC_BUCKET(struct bch_dev *ca,
112 const struct bch_extent_ptr *ptr)
114 return gc_bucket(ca, PTR_BUCKET_NR(ca, ptr));
117 static inline enum bch_data_type ptr_data_type(const struct bkey *k,
118 const struct bch_extent_ptr *ptr)
120 if (bkey_is_btree_ptr(k))
121 return BCH_DATA_btree;
123 return ptr->cached ? BCH_DATA_cached : BCH_DATA_user;
126 static inline s64 ptr_disk_sectors(s64 sectors, struct extent_ptr_decoded p)
128 EBUG_ON(sectors < 0);
130 return crc_is_compressed(p.crc)
131 ? DIV_ROUND_UP_ULL(sectors * p.crc.compressed_size,
132 p.crc.uncompressed_size)
136 static inline int gen_cmp(u8 a, u8 b)
141 static inline int gen_after(u8 a, u8 b)
143 int r = gen_cmp(a, b);
145 return r > 0 ? r : 0;
149 * ptr_stale() - check if a pointer points into a bucket that has been
152 static inline u8 ptr_stale(struct bch_dev *ca,
153 const struct bch_extent_ptr *ptr)
158 ret = gen_after(*bucket_gen(ca, PTR_BUCKET_NR(ca, ptr)), ptr->gen);
166 void bch2_dev_usage_read_fast(struct bch_dev *, struct bch_dev_usage *);
167 static inline struct bch_dev_usage bch2_dev_usage_read(struct bch_dev *ca)
169 struct bch_dev_usage ret;
171 bch2_dev_usage_read_fast(ca, &ret);
175 void bch2_dev_usage_init(struct bch_dev *);
177 static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_watermark watermark)
182 case BCH_WATERMARK_NR:
184 case BCH_WATERMARK_stripe:
185 reserved += ca->mi.nbuckets >> 6;
187 case BCH_WATERMARK_normal:
188 reserved += ca->mi.nbuckets >> 6;
190 case BCH_WATERMARK_copygc:
191 reserved += ca->nr_btree_reserve;
193 case BCH_WATERMARK_btree:
194 reserved += ca->nr_btree_reserve;
196 case BCH_WATERMARK_btree_copygc:
197 case BCH_WATERMARK_reclaim:
204 static inline u64 dev_buckets_free(struct bch_dev *ca,
205 struct bch_dev_usage usage,
206 enum bch_watermark watermark)
209 usage.d[BCH_DATA_free].buckets -
210 ca->nr_open_buckets -
211 bch2_dev_buckets_reserved(ca, watermark));
214 static inline u64 __dev_buckets_available(struct bch_dev *ca,
215 struct bch_dev_usage usage,
216 enum bch_watermark watermark)
219 usage.d[BCH_DATA_free].buckets
220 + usage.d[BCH_DATA_cached].buckets
221 + usage.d[BCH_DATA_need_gc_gens].buckets
222 + usage.d[BCH_DATA_need_discard].buckets
223 - ca->nr_open_buckets
224 - bch2_dev_buckets_reserved(ca, watermark));
227 static inline u64 dev_buckets_available(struct bch_dev *ca,
228 enum bch_watermark watermark)
230 return __dev_buckets_available(ca, bch2_dev_usage_read(ca), watermark);
233 /* Filesystem usage: */
235 static inline unsigned __fs_usage_u64s(unsigned nr_replicas)
237 return sizeof(struct bch_fs_usage) / sizeof(u64) + nr_replicas;
240 static inline unsigned fs_usage_u64s(struct bch_fs *c)
242 return __fs_usage_u64s(READ_ONCE(c->replicas.nr));
245 static inline unsigned __fs_usage_online_u64s(unsigned nr_replicas)
247 return sizeof(struct bch_fs_usage_online) / sizeof(u64) + nr_replicas;
250 static inline unsigned fs_usage_online_u64s(struct bch_fs *c)
252 return __fs_usage_online_u64s(READ_ONCE(c->replicas.nr));
255 static inline unsigned dev_usage_u64s(void)
257 return sizeof(struct bch_dev_usage) / sizeof(u64);
260 u64 bch2_fs_usage_read_one(struct bch_fs *, u64 *);
262 struct bch_fs_usage_online *bch2_fs_usage_read(struct bch_fs *);
264 void bch2_fs_usage_acc_to_base(struct bch_fs *, unsigned);
266 void bch2_fs_usage_to_text(struct printbuf *,
267 struct bch_fs *, struct bch_fs_usage_online *);
269 u64 bch2_fs_sectors_used(struct bch_fs *, struct bch_fs_usage_online *);
271 struct bch_fs_usage_short
272 bch2_fs_usage_read_short(struct bch_fs *);
274 /* key/bucket marking: */
276 static inline struct bch_fs_usage *fs_usage_ptr(struct bch_fs *c,
277 unsigned journal_seq,
280 percpu_rwsem_assert_held(&c->mark_lock);
281 BUG_ON(!gc && !journal_seq);
283 return this_cpu_ptr(gc
285 : c->usage[journal_seq & JOURNAL_BUF_MASK]);
288 int bch2_replicas_deltas_realloc(struct btree_trans *, unsigned);
290 void bch2_fs_usage_initialize(struct bch_fs *);
292 int bch2_mark_metadata_bucket(struct bch_fs *, struct bch_dev *,
293 size_t, enum bch_data_type, unsigned,
294 struct gc_pos, unsigned);
296 int bch2_mark_alloc(struct btree_trans *, enum btree_id, unsigned,
297 struct bkey_s_c, struct bkey_s_c, unsigned);
298 int bch2_mark_extent(struct btree_trans *, enum btree_id, unsigned,
299 struct bkey_s_c, struct bkey_s_c, unsigned);
300 int bch2_mark_stripe(struct btree_trans *, enum btree_id, unsigned,
301 struct bkey_s_c, struct bkey_s_c, unsigned);
302 int bch2_mark_reservation(struct btree_trans *, enum btree_id, unsigned,
303 struct bkey_s_c, struct bkey_s_c, unsigned);
304 int bch2_mark_reflink_p(struct btree_trans *, enum btree_id, unsigned,
305 struct bkey_s_c, struct bkey_s_c, unsigned);
307 int bch2_trans_mark_extent(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned);
308 int bch2_trans_mark_stripe(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned);
309 int bch2_trans_mark_reservation(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned);
310 int bch2_trans_mark_reflink_p(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned);
312 void bch2_trans_fs_usage_revert(struct btree_trans *, struct replicas_delta_list *);
313 int bch2_trans_fs_usage_apply(struct btree_trans *, struct replicas_delta_list *);
315 int bch2_trans_mark_metadata_bucket(struct btree_trans *, struct bch_dev *,
316 size_t, enum bch_data_type, unsigned);
317 int bch2_trans_mark_dev_sb(struct bch_fs *, struct bch_dev *);
319 static inline bool is_superblock_bucket(struct bch_dev *ca, u64 b)
321 struct bch_sb_layout *layout = &ca->disk_sb.sb->layout;
322 u64 b_offset = bucket_to_sector(ca, b);
323 u64 b_end = bucket_to_sector(ca, b + 1);
329 for (i = 0; i < layout->nr_superblocks; i++) {
330 u64 offset = le64_to_cpu(layout->sb_offset[i]);
331 u64 end = offset + (1 << layout->sb_max_size_bits);
333 if (!(offset >= b_end || end <= b_offset))
340 /* disk reservations: */
342 static inline void bch2_disk_reservation_put(struct bch_fs *c,
343 struct disk_reservation *res)
346 this_cpu_sub(*c->online_reserved, res->sectors);
351 #define BCH_DISK_RESERVATION_NOFAIL (1 << 0)
353 int __bch2_disk_reservation_add(struct bch_fs *,
354 struct disk_reservation *,
357 static inline int bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res,
358 u64 sectors, int flags)
364 old = this_cpu_read(c->pcpu->sectors_available);
366 return __bch2_disk_reservation_add(c, res, sectors, flags);
369 } while (this_cpu_cmpxchg(c->pcpu->sectors_available, old, new) != old);
371 this_cpu_add(*c->online_reserved, sectors);
372 res->sectors += sectors;
375 return __bch2_disk_reservation_add(c, res, sectors, flags);
379 static inline struct disk_reservation
380 bch2_disk_reservation_init(struct bch_fs *c, unsigned nr_replicas)
382 return (struct disk_reservation) {
386 .gen = c->capacity_gen,
388 .nr_replicas = nr_replicas,
392 static inline int bch2_disk_reservation_get(struct bch_fs *c,
393 struct disk_reservation *res,
394 u64 sectors, unsigned nr_replicas,
397 *res = bch2_disk_reservation_init(c, nr_replicas);
399 return bch2_disk_reservation_add(c, res, sectors * nr_replicas, flags);
402 #define RESERVE_FACTOR 6
404 static inline u64 avail_factor(u64 r)
406 return div_u64(r << RESERVE_FACTOR, (1 << RESERVE_FACTOR) + 1);
409 int bch2_dev_buckets_resize(struct bch_fs *, struct bch_dev *, u64);
410 void bch2_dev_buckets_free(struct bch_dev *);
411 int bch2_dev_buckets_alloc(struct bch_fs *, struct bch_dev *);
413 #endif /* _BUCKETS_H */