diff options
Diffstat (limited to 'fs/bcachefs/buckets.h')
| -rw-r--r-- | fs/bcachefs/buckets.h | 369 |
1 files changed, 0 insertions, 369 deletions
diff --git a/fs/bcachefs/buckets.h b/fs/bcachefs/buckets.h deleted file mode 100644 index 49a3807a5eab..000000000000 --- a/fs/bcachefs/buckets.h +++ /dev/null @@ -1,369 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Code for manipulating bucket marks for garbage collection. - * - * Copyright 2014 Datera, Inc. - */ - -#ifndef _BUCKETS_H -#define _BUCKETS_H - -#include "buckets_types.h" -#include "extents.h" -#include "sb-members.h" - -static inline u64 sector_to_bucket(const struct bch_dev *ca, sector_t s) -{ - return div_u64(s, ca->mi.bucket_size); -} - -static inline sector_t bucket_to_sector(const struct bch_dev *ca, size_t b) -{ - return ((sector_t) b) * ca->mi.bucket_size; -} - -static inline sector_t bucket_remainder(const struct bch_dev *ca, sector_t s) -{ - u32 remainder; - - div_u64_rem(s, ca->mi.bucket_size, &remainder); - return remainder; -} - -static inline u64 sector_to_bucket_and_offset(const struct bch_dev *ca, sector_t s, u32 *offset) -{ - return div_u64_rem(s, ca->mi.bucket_size, offset); -} - -#define for_each_bucket(_b, _buckets) \ - for (_b = (_buckets)->b + (_buckets)->first_bucket; \ - _b < (_buckets)->b + (_buckets)->nbuckets; _b++) - -static inline void bucket_unlock(struct bucket *b) -{ - BUILD_BUG_ON(!((union ulong_byte_assert) { .ulong = 1UL << BUCKET_LOCK_BITNR }).byte); - - clear_bit_unlock(BUCKET_LOCK_BITNR, (void *) &b->lock); - smp_mb__after_atomic(); - wake_up_bit((void *) &b->lock, BUCKET_LOCK_BITNR); -} - -static inline void bucket_lock(struct bucket *b) -{ - wait_on_bit_lock((void *) &b->lock, BUCKET_LOCK_BITNR, - TASK_UNINTERRUPTIBLE); -} - -static inline struct bucket *gc_bucket(struct bch_dev *ca, size_t b) -{ - return bucket_valid(ca, b) - ? genradix_ptr(&ca->buckets_gc, b) - : NULL; -} - -static inline struct bucket_gens *bucket_gens(struct bch_dev *ca) -{ - return rcu_dereference_check(ca->bucket_gens, - lockdep_is_held(&ca->fs->state_lock)); -} - -static inline u8 *bucket_gen(struct bch_dev *ca, size_t b) -{ - struct bucket_gens *gens = bucket_gens(ca); - - if (b - gens->first_bucket >= gens->nbuckets_minus_first) - return NULL; - return gens->b + b; -} - -static inline int bucket_gen_get_rcu(struct bch_dev *ca, size_t b) -{ - u8 *gen = bucket_gen(ca, b); - return gen ? *gen : -1; -} - -static inline int bucket_gen_get(struct bch_dev *ca, size_t b) -{ - guard(rcu)(); - return bucket_gen_get_rcu(ca, b); -} - -static inline size_t PTR_BUCKET_NR(const struct bch_dev *ca, - const struct bch_extent_ptr *ptr) -{ - return sector_to_bucket(ca, ptr->offset); -} - -static inline struct bpos PTR_BUCKET_POS(const struct bch_dev *ca, - const struct bch_extent_ptr *ptr) -{ - return POS(ptr->dev, PTR_BUCKET_NR(ca, ptr)); -} - -static inline struct bpos PTR_BUCKET_POS_OFFSET(const struct bch_dev *ca, - const struct bch_extent_ptr *ptr, - u32 *bucket_offset) -{ - return POS(ptr->dev, sector_to_bucket_and_offset(ca, ptr->offset, bucket_offset)); -} - -static inline struct bucket *PTR_GC_BUCKET(struct bch_dev *ca, - const struct bch_extent_ptr *ptr) -{ - return gc_bucket(ca, PTR_BUCKET_NR(ca, ptr)); -} - -static inline enum bch_data_type ptr_data_type(const struct bkey *k, - const struct bch_extent_ptr *ptr) -{ - if (bkey_is_btree_ptr(k)) - return BCH_DATA_btree; - - return ptr->cached ? BCH_DATA_cached : BCH_DATA_user; -} - -static inline s64 ptr_disk_sectors(s64 sectors, struct extent_ptr_decoded p) -{ - EBUG_ON(sectors < 0); - - return crc_is_compressed(p.crc) - ? DIV_ROUND_UP_ULL(sectors * p.crc.compressed_size, - p.crc.uncompressed_size) - : sectors; -} - -static inline int gen_cmp(u8 a, u8 b) -{ - return (s8) (a - b); -} - -static inline int gen_after(u8 a, u8 b) -{ - return max(0, gen_cmp(a, b)); -} - -static inline int dev_ptr_stale_rcu(struct bch_dev *ca, const struct bch_extent_ptr *ptr) -{ - int gen = bucket_gen_get_rcu(ca, PTR_BUCKET_NR(ca, ptr)); - return gen < 0 ? gen : gen_after(gen, ptr->gen); -} - -/** - * dev_ptr_stale() - check if a pointer points into a bucket that has been - * invalidated. - */ -static inline int dev_ptr_stale(struct bch_dev *ca, const struct bch_extent_ptr *ptr) -{ - guard(rcu)(); - return dev_ptr_stale_rcu(ca, ptr); -} - -/* Device usage: */ - -void bch2_dev_usage_read_fast(struct bch_dev *, struct bch_dev_usage *); -static inline struct bch_dev_usage bch2_dev_usage_read(struct bch_dev *ca) -{ - struct bch_dev_usage ret; - - bch2_dev_usage_read_fast(ca, &ret); - return ret; -} - -void bch2_dev_usage_full_read_fast(struct bch_dev *, struct bch_dev_usage_full *); -static inline struct bch_dev_usage_full bch2_dev_usage_full_read(struct bch_dev *ca) -{ - struct bch_dev_usage_full ret; - - bch2_dev_usage_full_read_fast(ca, &ret); - return ret; -} - -void bch2_dev_usage_to_text(struct printbuf *, struct bch_dev *, struct bch_dev_usage_full *); - -static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_watermark watermark) -{ - s64 reserved = 0; - - switch (watermark) { - case BCH_WATERMARK_NR: - BUG(); - case BCH_WATERMARK_stripe: - reserved += ca->mi.nbuckets >> 6; - fallthrough; - case BCH_WATERMARK_normal: - reserved += ca->mi.nbuckets >> 6; - fallthrough; - case BCH_WATERMARK_copygc: - reserved += ca->nr_btree_reserve; - fallthrough; - case BCH_WATERMARK_btree: - reserved += ca->nr_btree_reserve; - fallthrough; - case BCH_WATERMARK_btree_copygc: - case BCH_WATERMARK_reclaim: - case BCH_WATERMARK_interior_updates: - break; - } - - return reserved; -} - -static inline u64 dev_buckets_free(struct bch_dev *ca, - struct bch_dev_usage usage, - enum bch_watermark watermark) -{ - return max_t(s64, 0, - usage.buckets[BCH_DATA_free]- - ca->nr_open_buckets - - bch2_dev_buckets_reserved(ca, watermark)); -} - -static inline u64 __dev_buckets_available(struct bch_dev *ca, - struct bch_dev_usage usage, - enum bch_watermark watermark) -{ - return max_t(s64, 0, - usage.buckets[BCH_DATA_free] - + usage.buckets[BCH_DATA_cached] - + usage.buckets[BCH_DATA_need_gc_gens] - + usage.buckets[BCH_DATA_need_discard] - - ca->nr_open_buckets - - bch2_dev_buckets_reserved(ca, watermark)); -} - -static inline u64 dev_buckets_available(struct bch_dev *ca, - enum bch_watermark watermark) -{ - return __dev_buckets_available(ca, bch2_dev_usage_read(ca), watermark); -} - -/* Filesystem usage: */ - -struct bch_fs_usage_short -bch2_fs_usage_read_short(struct bch_fs *); - -int bch2_bucket_ref_update(struct btree_trans *, struct bch_dev *, - struct bkey_s_c, const struct bch_extent_ptr *, - s64, enum bch_data_type, u8, u8, u32 *); - -int bch2_check_fix_ptrs(struct btree_trans *, - enum btree_id, unsigned, struct bkey_s_c, - enum btree_iter_update_trigger_flags); - -int bch2_trigger_extent(struct btree_trans *, enum btree_id, unsigned, - struct bkey_s_c, struct bkey_s, - enum btree_iter_update_trigger_flags); -int bch2_trigger_reservation(struct btree_trans *, enum btree_id, unsigned, - struct bkey_s_c, struct bkey_s, - enum btree_iter_update_trigger_flags); - -#define trigger_run_overwrite_then_insert(_fn, _trans, _btree_id, _level, _old, _new, _flags)\ -({ \ - int ret = 0; \ - \ - if (_old.k->type) \ - ret = _fn(_trans, _btree_id, _level, _old, _flags & ~BTREE_TRIGGER_insert); \ - if (!ret && _new.k->type) \ - ret = _fn(_trans, _btree_id, _level, _new.s_c, _flags & ~BTREE_TRIGGER_overwrite);\ - ret; \ -}) - -void bch2_trans_account_disk_usage_change(struct btree_trans *); - -int bch2_trans_mark_metadata_bucket(struct btree_trans *, struct bch_dev *, u64, - enum bch_data_type, unsigned, - enum btree_iter_update_trigger_flags); -int bch2_trans_mark_dev_sb(struct bch_fs *, struct bch_dev *, - enum btree_iter_update_trigger_flags); -int bch2_trans_mark_dev_sbs_flags(struct bch_fs *, - enum btree_iter_update_trigger_flags); -int bch2_trans_mark_dev_sbs(struct bch_fs *); - -bool bch2_is_superblock_bucket(struct bch_dev *, u64); - -static inline const char *bch2_data_type_str(enum bch_data_type type) -{ - return type < BCH_DATA_NR - ? __bch2_data_types[type] - : "(invalid data type)"; -} - -/* disk reservations: */ - -static inline void bch2_disk_reservation_put(struct bch_fs *c, - struct disk_reservation *res) -{ - if (res->sectors) { - this_cpu_sub(*c->online_reserved, res->sectors); - res->sectors = 0; - } -} - -enum bch_reservation_flags { - BCH_DISK_RESERVATION_NOFAIL = 1 << 0, - BCH_DISK_RESERVATION_PARTIAL = 1 << 1, -}; - -int __bch2_disk_reservation_add(struct bch_fs *, struct disk_reservation *, - u64, enum bch_reservation_flags); - -static inline int bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res, - u64 sectors, enum bch_reservation_flags flags) -{ -#ifdef __KERNEL__ - u64 old, new; - - old = this_cpu_read(c->pcpu->sectors_available); - do { - if (sectors > old) - return __bch2_disk_reservation_add(c, res, sectors, flags); - - new = old - sectors; - } while (!this_cpu_try_cmpxchg(c->pcpu->sectors_available, &old, new)); - - this_cpu_add(*c->online_reserved, sectors); - res->sectors += sectors; - return 0; -#else - return __bch2_disk_reservation_add(c, res, sectors, flags); -#endif -} - -static inline struct disk_reservation -bch2_disk_reservation_init(struct bch_fs *c, unsigned nr_replicas) -{ - return (struct disk_reservation) { - .sectors = 0, -#if 0 - /* not used yet: */ - .gen = c->capacity_gen, -#endif - .nr_replicas = nr_replicas, - }; -} - -static inline int bch2_disk_reservation_get(struct bch_fs *c, - struct disk_reservation *res, - u64 sectors, unsigned nr_replicas, - int flags) -{ - *res = bch2_disk_reservation_init(c, nr_replicas); - - return bch2_disk_reservation_add(c, res, sectors * nr_replicas, flags); -} - -#define RESERVE_FACTOR 6 - -static inline u64 avail_factor(u64 r) -{ - return div_u64(r << RESERVE_FACTOR, (1 << RESERVE_FACTOR) + 1); -} - -void bch2_buckets_nouse_free(struct bch_fs *); -int bch2_buckets_nouse_alloc(struct bch_fs *); - -int bch2_dev_buckets_resize(struct bch_fs *, struct bch_dev *, u64); -void bch2_dev_buckets_free(struct bch_dev *); -int bch2_dev_buckets_alloc(struct bch_fs *, struct bch_dev *); - -#endif /* _BUCKETS_H */ |