diff options
Diffstat (limited to 'fs/bcachefs/buckets.h')
| -rw-r--r-- | fs/bcachefs/buckets.h | 52 |
1 files changed, 16 insertions, 36 deletions
diff --git a/fs/bcachefs/buckets.h b/fs/bcachefs/buckets.h index a9acdd6c0c86..1c38b165f48b 100644 --- a/fs/bcachefs/buckets.h +++ b/fs/bcachefs/buckets.h @@ -39,33 +39,6 @@ static inline u64 sector_to_bucket_and_offset(const struct bch_dev *ca, sector_t 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) { BUILD_BUG_ON(!((union ulong_byte_assert) { .ulong = 1UL << BUCKET_LOCK_BITNR }).byte); @@ -167,9 +140,7 @@ static inline int gen_cmp(u8 a, u8 b) static inline int gen_after(u8 a, u8 b) { - int r = gen_cmp(a, b); - - return r > 0 ? r : 0; + return max(0, gen_cmp(a, b)); } static inline int dev_ptr_stale_rcu(struct bch_dev *ca, const struct bch_extent_ptr *ptr) @@ -201,7 +172,16 @@ static inline struct bch_dev_usage bch2_dev_usage_read(struct bch_dev *ca) return ret; } -void bch2_dev_usage_to_text(struct printbuf *, struct bch_dev *, struct bch_dev_usage *); +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) { @@ -236,7 +216,7 @@ static inline u64 dev_buckets_free(struct bch_dev *ca, enum bch_watermark watermark) { return max_t(s64, 0, - usage.d[BCH_DATA_free].buckets - + usage.buckets[BCH_DATA_free]- ca->nr_open_buckets - bch2_dev_buckets_reserved(ca, watermark)); } @@ -246,10 +226,10 @@ static inline u64 __dev_buckets_available(struct bch_dev *ca, enum bch_watermark watermark) { return max_t(s64, 0, - usage.d[BCH_DATA_free].buckets - + usage.d[BCH_DATA_cached].buckets - + usage.d[BCH_DATA_need_gc_gens].buckets - + usage.d[BCH_DATA_need_discard].buckets + 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)); } |