X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Fbuckets.h;h=ecbeb7280f87f3cd2f9d3146412ebe8ebdf68da6;hb=a053ebfb8c89e023a44c365e369f4053cfc53376;hp=6881502d95f1abf9b62b44997c9c83bd42abeb79;hpb=bad0c8c50758b4447d529f61017c1a8c85976a3e;p=bcachefs-tools-debian diff --git a/libbcachefs/buckets.h b/libbcachefs/buckets.h index 6881502..ecbeb72 100644 --- a/libbcachefs/buckets.h +++ b/libbcachefs/buckets.h @@ -10,21 +10,72 @@ #include "buckets_types.h" #include "extents.h" -#include "super.h" +#include "sb-members.h" + +static inline size_t 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 size_t 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++) +/* + * Ugly hack alert: + * + * We need to cram a spinlock in a single byte, because that's what we have left + * in struct bucket, and we care about the size of these - during fsck, we need + * in memory state for every single bucket on every device. + * + * We used to do + * while (xchg(&b->lock, 1) cpu_relax(); + * but, it turns out not all architectures support xchg on a single byte. + * + * So now we use bit_spin_lock(), with fun games since we can't burn a whole + * ulong for this - we just need to make sure the lock bit always ends up in the + * first byte. + */ + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ +#define BUCKET_LOCK_BITNR 0 +#else +#define BUCKET_LOCK_BITNR (BITS_PER_LONG - 1) +#endif + +union ulong_byte_assert { + ulong ulong; + u8 byte; +}; + static inline void bucket_unlock(struct bucket *b) { - smp_store_release(&b->lock, 0); + BUILD_BUG_ON(!((union ulong_byte_assert) { .ulong = 1UL << BUCKET_LOCK_BITNR }).byte); + bit_spin_unlock(BUCKET_LOCK_BITNR, (void *) &b->lock); } static inline void bucket_lock(struct bucket *b) { - while (xchg(&b->lock, 1)) - cpu_relax(); + bit_spin_lock(BUCKET_LOCK_BITNR, (void *) &b->lock); } static inline struct bucket_array *gc_bucket_array(struct bch_dev *ca) @@ -139,24 +190,38 @@ static inline u8 ptr_stale(struct bch_dev *ca, /* Device usage: */ -struct bch_dev_usage bch2_dev_usage_read(struct bch_dev *); +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_init(struct bch_dev *); -static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum alloc_reserve reserve) +static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_watermark watermark) { s64 reserved = 0; - switch (reserve) { - case RESERVE_none: + 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 RESERVE_movinggc: + case BCH_WATERMARK_copygc: reserved += ca->nr_btree_reserve; fallthrough; - case RESERVE_btree: + case BCH_WATERMARK_btree: reserved += ca->nr_btree_reserve; fallthrough; - case RESERVE_btree_movinggc: + case BCH_WATERMARK_btree_copygc: + case BCH_WATERMARK_reclaim: break; } @@ -165,17 +230,17 @@ static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum alloc_reser static inline u64 dev_buckets_free(struct bch_dev *ca, struct bch_dev_usage usage, - enum alloc_reserve reserve) + enum bch_watermark watermark) { return max_t(s64, 0, usage.d[BCH_DATA_free].buckets - ca->nr_open_buckets - - bch2_dev_buckets_reserved(ca, reserve)); + bch2_dev_buckets_reserved(ca, watermark)); } static inline u64 __dev_buckets_available(struct bch_dev *ca, struct bch_dev_usage usage, - enum alloc_reserve reserve) + enum bch_watermark watermark) { return max_t(s64, 0, usage.d[BCH_DATA_free].buckets @@ -183,21 +248,35 @@ static inline u64 __dev_buckets_available(struct bch_dev *ca, + usage.d[BCH_DATA_need_gc_gens].buckets + usage.d[BCH_DATA_need_discard].buckets - ca->nr_open_buckets - - bch2_dev_buckets_reserved(ca, reserve)); + - bch2_dev_buckets_reserved(ca, watermark)); } static inline u64 dev_buckets_available(struct bch_dev *ca, - enum alloc_reserve reserve) + enum bch_watermark watermark) { - return __dev_buckets_available(ca, bch2_dev_usage_read(ca), reserve); + return __dev_buckets_available(ca, bch2_dev_usage_read(ca), watermark); } /* Filesystem usage: */ +static inline unsigned __fs_usage_u64s(unsigned nr_replicas) +{ + return sizeof(struct bch_fs_usage) / sizeof(u64) + nr_replicas; +} + static inline unsigned fs_usage_u64s(struct bch_fs *c) { - return sizeof(struct bch_fs_usage) / sizeof(u64) + - READ_ONCE(c->replicas.nr); + return __fs_usage_u64s(READ_ONCE(c->replicas.nr)); +} + +static inline unsigned __fs_usage_online_u64s(unsigned nr_replicas) +{ + return sizeof(struct bch_fs_usage_online) / sizeof(u64) + nr_replicas; +} + +static inline unsigned fs_usage_online_u64s(struct bch_fs *c) +{ + return __fs_usage_online_u64s(READ_ONCE(c->replicas.nr)); } static inline unsigned dev_usage_u64s(void) @@ -221,47 +300,108 @@ bch2_fs_usage_read_short(struct bch_fs *); /* key/bucket marking: */ +static inline struct bch_fs_usage *fs_usage_ptr(struct bch_fs *c, + unsigned journal_seq, + bool gc) +{ + percpu_rwsem_assert_held(&c->mark_lock); + BUG_ON(!gc && !journal_seq); + + return this_cpu_ptr(gc + ? c->usage_gc + : c->usage[journal_seq & JOURNAL_BUF_MASK]); +} + +int bch2_replicas_deltas_realloc(struct btree_trans *, unsigned); + void bch2_fs_usage_initialize(struct bch_fs *); int bch2_mark_metadata_bucket(struct bch_fs *, struct bch_dev *, size_t, enum bch_data_type, unsigned, struct gc_pos, unsigned); -int bch2_mark_alloc(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); -int bch2_mark_extent(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); -int bch2_mark_stripe(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); -int bch2_mark_inode(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); -int bch2_mark_reservation(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); -int bch2_mark_reflink_p(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); +int bch2_mark_alloc(struct btree_trans *, enum btree_id, unsigned, + struct bkey_s_c, struct bkey_s_c, unsigned); +int bch2_mark_extent(struct btree_trans *, enum btree_id, unsigned, + struct bkey_s_c, struct bkey_s_c, unsigned); +int bch2_mark_stripe(struct btree_trans *, enum btree_id, unsigned, + struct bkey_s_c, struct bkey_s_c, unsigned); +int bch2_mark_reservation(struct btree_trans *, enum btree_id, unsigned, + struct bkey_s_c, struct bkey_s_c, unsigned); +int bch2_mark_reflink_p(struct btree_trans *, enum btree_id, unsigned, + struct bkey_s_c, struct bkey_s_c, unsigned); int bch2_trans_mark_extent(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned); int bch2_trans_mark_stripe(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned); -int bch2_trans_mark_inode(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned); int bch2_trans_mark_reservation(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned); int bch2_trans_mark_reflink_p(struct btree_trans *, enum btree_id, unsigned, struct bkey_s_c, struct bkey_i *, unsigned); -int bch2_mark_key(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); - +void bch2_trans_fs_usage_revert(struct btree_trans *, struct replicas_delta_list *); int bch2_trans_fs_usage_apply(struct btree_trans *, struct replicas_delta_list *); int bch2_trans_mark_metadata_bucket(struct btree_trans *, struct bch_dev *, size_t, enum bch_data_type, unsigned); int bch2_trans_mark_dev_sb(struct bch_fs *, struct bch_dev *); +static inline bool is_superblock_bucket(struct bch_dev *ca, u64 b) +{ + struct bch_sb_layout *layout = &ca->disk_sb.sb->layout; + u64 b_offset = bucket_to_sector(ca, b); + u64 b_end = bucket_to_sector(ca, b + 1); + unsigned i; + + if (!b) + return true; + + for (i = 0; i < layout->nr_superblocks; i++) { + u64 offset = le64_to_cpu(layout->sb_offset[i]); + u64 end = offset + (1 << layout->sb_max_size_bits); + + if (!(offset >= b_end || end <= b_offset)) + return true; + } + + return false; +} + /* disk reservations: */ static inline void bch2_disk_reservation_put(struct bch_fs *c, struct disk_reservation *res) { - this_cpu_sub(*c->online_reserved, res->sectors); - res->sectors = 0; + if (res->sectors) { + this_cpu_sub(*c->online_reserved, res->sectors); + res->sectors = 0; + } } #define BCH_DISK_RESERVATION_NOFAIL (1 << 0) -int bch2_disk_reservation_add(struct bch_fs *, - struct disk_reservation *, - u64, int); +int __bch2_disk_reservation_add(struct bch_fs *, + struct disk_reservation *, + u64, int); + +static inline int bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res, + u64 sectors, int flags) +{ +#ifdef __KERNEL__ + u64 old, new; + + do { + old = this_cpu_read(c->pcpu->sectors_available); + if (sectors > old) + return __bch2_disk_reservation_add(c, res, sectors, flags); + + new = old - sectors; + } while (this_cpu_cmpxchg(c->pcpu->sectors_available, old, new) != old); + + 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)