X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Fbuckets.h;h=379101d7e585b414de3757fc161a4c4f407b14a7;hb=93241a1c9a7dbef987f524a9dea3fc61e87e845b;hp=ef4e100aa9b6882786bf5ac1f42ca90341e62727;hpb=cfa816bf3f823a3bedfedd8e214ea929c5c755fe;p=bcachefs-tools-debian diff --git a/libbcachefs/buckets.h b/libbcachefs/buckets.h index ef4e100..379101d 100644 --- a/libbcachefs/buckets.h +++ b/libbcachefs/buckets.h @@ -10,21 +10,75 @@ #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); + + clear_bit_unlock(BUCKET_LOCK_BITNR, (void *) &b->lock); + wake_up_bit((void *) &b->lock, BUCKET_LOCK_BITNR); } static inline void bucket_lock(struct bucket *b) { - while (xchg(&b->lock, 1)) - cpu_relax(); + wait_on_bit_lock((void *) &b->lock, BUCKET_LOCK_BITNR, + TASK_UNINTERRUPTIBLE); } static inline struct bucket_array *gc_bucket_array(struct bch_dev *ca) @@ -149,6 +203,7 @@ static inline struct bch_dev_usage bch2_dev_usage_read(struct bch_dev *ca) } void bch2_dev_usage_init(struct bch_dev *); +void bch2_dev_usage_to_text(struct printbuf *, struct bch_dev_usage *); static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_watermark watermark) { @@ -156,7 +211,7 @@ static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_waterma switch (watermark) { case BCH_WATERMARK_NR: - unreachable(); + BUG(); case BCH_WATERMARK_stripe: reserved += ca->mi.nbuckets >> 6; fallthrough; @@ -170,6 +225,7 @@ static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_waterma reserved += ca->nr_btree_reserve; fallthrough; case BCH_WATERMARK_btree_copygc: + case BCH_WATERMARK_reclaim: break; } @@ -248,6 +304,23 @@ 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_update_replicas_list(struct btree_trans *, + struct bch_replicas_entry_v1 *, s64); +int bch2_update_cached_sectors_list(struct btree_trans *, unsigned, s64); +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 *, @@ -260,32 +333,25 @@ 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_inode(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); - -#define mem_trigger_run_insert_then_overwrite(_fn, _trans, _btree_id, _level, _old, _new, _flags)\ +#define mem_trigger_run_overwrite_then_insert(_fn, _trans, _btree_id, _level, _old, _new, _flags)\ ({ \ int ret = 0; \ \ - if (_new.k->type) \ - ret = _fn(_trans, _btree_id, _level, _new, _flags & ~BTREE_TRIGGER_OVERWRITE); \ - if (_old.k->type && !ret) \ + 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, _flags & ~BTREE_TRIGGER_OVERWRITE); \ ret; \ }) -#define trigger_run_insert_then_overwrite(_fn, _trans, _btree_id, _level, _old, _new, _flags) \ - mem_trigger_run_insert_then_overwrite(_fn, _trans, _btree_id, _level, _old, bkey_i_to_s_c(_new), _flags) +#define trigger_run_overwrite_then_insert(_fn, _trans, _btree_id, _level, _old, _new, _flags) \ + mem_trigger_run_overwrite_then_insert(_fn, _trans, _btree_id, _level, _old, bkey_i_to_s_c(_new), _flags) 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 *); @@ -293,6 +359,28 @@ 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 *); +int bch2_trans_mark_dev_sbs(struct bch_fs *); + +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: */