+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Code for manipulating bucket marks for garbage collection.
*
#define _BUCKETS_H
#include "buckets_types.h"
-#include "super.h"
+#include "extents.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++)
-#define bucket_cmpxchg(g, new, expr) \
-({ \
- u64 _v = atomic64_read(&(g)->_mark.v); \
- struct bucket_mark _old; \
- \
- do { \
- (new).v.counter = _old.v.counter = _v; \
- expr; \
- } while ((_v = atomic64_cmpxchg(&(g)->_mark.v, \
- _old.v.counter, \
- (new).v.counter)) != _old.v.counter);\
- _old; \
-})
+/*
+ * 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);
+
+ clear_bit_unlock(BUCKET_LOCK_BITNR, (void *) &b->lock);
+ wake_up_bit((void *) &b->lock, BUCKET_LOCK_BITNR);
+}
-static inline struct bucket_array *bucket_array(struct bch_dev *ca)
+static inline void bucket_lock(struct bucket *b)
{
- return rcu_dereference_check(ca->buckets,
+ wait_on_bit_lock((void *) &b->lock, BUCKET_LOCK_BITNR,
+ TASK_UNINTERRUPTIBLE);
+}
+
+static inline struct bucket_array *gc_bucket_array(struct bch_dev *ca)
+{
+ return rcu_dereference_check(ca->buckets_gc,
!ca->fs ||
- percpu_rwsem_is_held(&ca->fs->usage_lock) ||
+ percpu_rwsem_is_held(&ca->fs->mark_lock) ||
lockdep_is_held(&ca->fs->gc_lock) ||
lockdep_is_held(&ca->bucket_lock));
}
-static inline struct bucket *bucket(struct bch_dev *ca, size_t b)
+static inline struct bucket *gc_bucket(struct bch_dev *ca, size_t b)
{
- struct bucket_array *buckets = bucket_array(ca);
+ struct bucket_array *buckets = gc_bucket_array(ca);
BUG_ON(b < buckets->first_bucket || b >= buckets->nbuckets);
return buckets->b + b;
}
-static inline void bucket_io_clock_reset(struct bch_fs *c, struct bch_dev *ca,
- size_t b, int rw)
+static inline struct bucket_gens *bucket_gens(struct bch_dev *ca)
{
- bucket(ca, b)->io_time[rw] = c->bucket_clock[rw].hand;
+ return rcu_dereference_check(ca->bucket_gens,
+ !ca->fs ||
+ percpu_rwsem_is_held(&ca->fs->mark_lock) ||
+ lockdep_is_held(&ca->fs->gc_lock) ||
+ lockdep_is_held(&ca->bucket_lock));
}
-static inline u16 bucket_last_io(struct bch_fs *c, struct bucket *g, int rw)
+static inline u8 *bucket_gen(struct bch_dev *ca, size_t b)
{
- return c->bucket_clock[rw].hand - g->io_time[rw];
-}
+ struct bucket_gens *gens = bucket_gens(ca);
-/*
- * bucket_gc_gen() returns the difference between the bucket's current gen and
- * the oldest gen of any pointer into that bucket in the btree.
- */
-
-static inline u8 bucket_gc_gen(struct bch_dev *ca, size_t b)
-{
- return bucket(ca, b)->mark.gen - ca->oldest_gens[b];
+ BUG_ON(b < gens->first_bucket || b >= gens->nbuckets);
+ return gens->b + b;
}
static inline size_t PTR_BUCKET_NR(const struct bch_dev *ca,
return sector_to_bucket(ca, ptr->offset);
}
-static inline struct bucket *PTR_BUCKET(struct bch_dev *ca,
- const struct bch_extent_ptr *ptr)
+static inline struct bpos PTR_BUCKET_POS(const struct bch_fs *c,
+ const struct bch_extent_ptr *ptr)
{
- return bucket(ca, PTR_BUCKET_NR(ca, ptr));
+ struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
+
+ return POS(ptr->dev, PTR_BUCKET_NR(ca, ptr));
}
-static inline struct bucket_mark ptr_bucket_mark(struct bch_dev *ca,
- const struct bch_extent_ptr *ptr)
+static inline struct bpos PTR_BUCKET_POS_OFFSET(const struct bch_fs *c,
+ const struct bch_extent_ptr *ptr,
+ u32 *bucket_offset)
{
- struct bucket_mark m;
+ struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
- rcu_read_lock();
- m = READ_ONCE(bucket(ca, PTR_BUCKET_NR(ca, ptr))->mark);
- rcu_read_unlock();
+ 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 m;
+ 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)
static inline u8 ptr_stale(struct bch_dev *ca,
const struct bch_extent_ptr *ptr)
{
- return gen_after(ptr_bucket_mark(ca, ptr).gen, ptr->gen);
-}
-
-/* bucket gc marks */
+ u8 ret;
-/* The dirty and cached sector counts saturate. If this occurs,
- * reference counting alone will not free the bucket, and a btree
- * GC must be performed. */
-#define GC_MAX_SECTORS_USED ((1U << 15) - 1)
+ rcu_read_lock();
+ ret = gen_after(*bucket_gen(ca, PTR_BUCKET_NR(ca, ptr)), ptr->gen);
+ rcu_read_unlock();
-static inline unsigned bucket_sectors_used(struct bucket_mark mark)
-{
- return mark.dirty_sectors + mark.cached_sectors;
+ return ret;
}
-static inline bool bucket_unused(struct bucket_mark mark)
+/* 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)
{
- return !mark.owned_by_allocator &&
- !mark.data_type &&
- !bucket_sectors_used(mark);
-}
+ struct bch_dev_usage ret;
-/* Device usage: */
+ bch2_dev_usage_read_fast(ca, &ret);
+ return ret;
+}
-struct bch_dev_usage __bch2_dev_usage_read(struct bch_dev *);
-struct bch_dev_usage bch2_dev_usage_read(struct bch_fs *, struct bch_dev *);
+void bch2_dev_usage_init(struct bch_dev *);
+void bch2_dev_usage_to_text(struct printbuf *, struct bch_dev_usage *);
-static inline u64 __dev_buckets_available(struct bch_dev *ca,
- struct bch_dev_usage stats)
+static inline u64 bch2_dev_buckets_reserved(struct bch_dev *ca, enum bch_watermark watermark)
{
- u64 total = ca->mi.nbuckets - ca->mi.first_bucket;
+ s64 reserved = 0;
- if (WARN_ONCE(stats.buckets_unavailable > total,
- "buckets_unavailable overflow (%llu > %llu)\n",
- stats.buckets_unavailable, total))
- return 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:
+ break;
+ }
- return total - stats.buckets_unavailable;
+ return reserved;
}
-/*
- * Number of reclaimable buckets - only for use by the allocator thread:
- */
-static inline u64 dev_buckets_available(struct bch_fs *c, struct bch_dev *ca)
+static inline u64 dev_buckets_free(struct bch_dev *ca,
+ struct bch_dev_usage usage,
+ enum bch_watermark watermark)
{
- return __dev_buckets_available(ca, bch2_dev_usage_read(c, ca));
+ return max_t(s64, 0,
+ usage.d[BCH_DATA_free].buckets -
+ ca->nr_open_buckets -
+ bch2_dev_buckets_reserved(ca, watermark));
}
-static inline u64 __dev_buckets_free(struct bch_dev *ca,
- struct bch_dev_usage stats)
+static inline u64 __dev_buckets_available(struct bch_dev *ca,
+ struct bch_dev_usage usage,
+ enum bch_watermark watermark)
{
- return __dev_buckets_available(ca, stats) +
- fifo_used(&ca->free[RESERVE_NONE]) +
- fifo_used(&ca->free_inc);
+ 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
+ - ca->nr_open_buckets
+ - bch2_dev_buckets_reserved(ca, watermark));
}
-static inline u64 dev_buckets_free(struct bch_fs *c, struct bch_dev *ca)
+static inline u64 dev_buckets_available(struct bch_dev *ca,
+ enum bch_watermark watermark)
{
- return __dev_buckets_free(ca, bch2_dev_usage_read(c, ca));
+ return __dev_buckets_available(ca, bch2_dev_usage_read(ca), watermark);
}
/* Filesystem usage: */
-static inline enum bch_data_type s_alloc_to_data_type(enum s_alloc s)
+static inline unsigned __fs_usage_u64s(unsigned nr_replicas)
{
- switch (s) {
- case S_META:
- return BCH_DATA_BTREE;
- case S_DIRTY:
- return BCH_DATA_USER;
- default:
- BUG();
- }
+ return sizeof(struct bch_fs_usage) / sizeof(u64) + nr_replicas;
+}
+
+static inline unsigned fs_usage_u64s(struct bch_fs *c)
+{
+ return __fs_usage_u64s(READ_ONCE(c->replicas.nr));
}
-struct bch_fs_usage __bch2_fs_usage_read(struct bch_fs *);
-struct bch_fs_usage bch2_fs_usage_read(struct bch_fs *);
-void bch2_fs_usage_apply(struct bch_fs *, struct bch_fs_usage *,
- struct disk_reservation *, struct gc_pos);
+static inline unsigned __fs_usage_online_u64s(unsigned nr_replicas)
+{
+ return sizeof(struct bch_fs_usage_online) / sizeof(u64) + nr_replicas;
+}
-u64 __bch2_fs_sectors_used(struct bch_fs *, struct bch_fs_usage);
-u64 bch2_fs_sectors_used(struct bch_fs *, struct bch_fs_usage);
-u64 bch2_fs_sectors_free(struct bch_fs *, struct bch_fs_usage);
+static inline unsigned fs_usage_online_u64s(struct bch_fs *c)
+{
+ return __fs_usage_online_u64s(READ_ONCE(c->replicas.nr));
+}
-static inline bool is_available_bucket(struct bucket_mark mark)
+static inline unsigned dev_usage_u64s(void)
{
- return (!mark.owned_by_allocator &&
- !mark.dirty_sectors &&
- !mark.nouse);
+ return sizeof(struct bch_dev_usage) / sizeof(u64);
}
-static inline bool bucket_needs_journal_commit(struct bucket_mark m,
- u16 last_seq_ondisk)
+u64 bch2_fs_usage_read_one(struct bch_fs *, u64 *);
+
+struct bch_fs_usage_online *bch2_fs_usage_read(struct bch_fs *);
+
+void bch2_fs_usage_acc_to_base(struct bch_fs *, unsigned);
+
+void bch2_fs_usage_to_text(struct printbuf *,
+ struct bch_fs *, struct bch_fs_usage_online *);
+
+u64 bch2_fs_sectors_used(struct bch_fs *, struct bch_fs_usage_online *);
+
+struct bch_fs_usage_short
+bch2_fs_usage_read_short(struct bch_fs *);
+
+void bch2_dev_usage_update(struct bch_fs *, struct bch_dev *,
+ const struct bch_alloc_v4 *,
+ const struct bch_alloc_v4 *, u64, bool);
+void bch2_dev_usage_update_m(struct bch_fs *, struct bch_dev *,
+ struct bucket *, struct bucket *);
+
+/* key/bucket marking: */
+
+static inline struct bch_fs_usage *fs_usage_ptr(struct bch_fs *c,
+ unsigned journal_seq,
+ bool gc)
{
- return m.journal_seq_valid &&
- ((s16) m.journal_seq - (s16) last_seq_ondisk > 0);
+ 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]);
}
-void bch2_bucket_seq_cleanup(struct bch_fs *);
+int bch2_update_replicas(struct bch_fs *, struct bkey_s_c,
+ struct bch_replicas_entry_v1 *, s64,
+ unsigned, bool);
+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_check_bucket_ref(struct btree_trans *, struct bkey_s_c,
+ const struct bch_extent_ptr *,
+ s64, enum bch_data_type, u8, u8, u32);
+
+int bch2_mark_metadata_bucket(struct bch_fs *, struct bch_dev *,
+ size_t, enum bch_data_type, unsigned,
+ struct gc_pos, unsigned);
+
+int bch2_trigger_extent(struct btree_trans *, enum btree_id, unsigned,
+ struct bkey_s_c, struct bkey_s, unsigned);
+int bch2_trigger_reservation(struct btree_trans *, enum btree_id, unsigned,
+ struct bkey_s_c, struct bkey_s, unsigned);
+
+#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_fs_usage_revert(struct btree_trans *, struct replicas_delta_list *);
+int bch2_trans_fs_usage_apply(struct btree_trans *, struct replicas_delta_list *);
-bool bch2_invalidate_bucket(struct bch_fs *, struct bch_dev *,
- size_t, struct bucket_mark *);
-void bch2_mark_alloc_bucket(struct bch_fs *, struct bch_dev *,
- size_t, bool, struct gc_pos, unsigned);
-void bch2_mark_metadata_bucket(struct bch_fs *, struct bch_dev *,
- size_t, enum bch_data_type, unsigned,
- struct gc_pos, unsigned);
+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 *);
-#define BCH_BUCKET_MARK_NOATOMIC (1 << 0)
-#define BCH_BUCKET_MARK_MAY_MAKE_UNAVAILABLE (1 << 1)
-#define BCH_BUCKET_MARK_GC_WILL_VISIT (1 << 2)
-#define BCH_BUCKET_MARK_GC_LOCK_HELD (1 << 3)
+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;
-void bch2_mark_key(struct bch_fs *, struct bkey_s_c, s64, bool, struct gc_pos,
- struct bch_fs_usage *, u64, unsigned);
+ if (!b)
+ return true;
-void bch2_recalc_sectors_available(struct bch_fs *);
+ 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);
-void __bch2_disk_reservation_put(struct bch_fs *, struct disk_reservation *);
+ 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)
{
- if (res->sectors)
- __bch2_disk_reservation_put(c, res);
+ if (res->sectors) {
+ this_cpu_sub(*c->online_reserved, res->sectors);
+ res->sectors = 0;
+ }
}
#define BCH_DISK_RESERVATION_NOFAIL (1 << 0)
-#define BCH_DISK_RESERVATION_GC_LOCK_HELD (1 << 1)
-#define BCH_DISK_RESERVATION_BTREE_LOCKS_HELD (1 << 2)
-int bch2_disk_reservation_add(struct bch_fs *,
- struct disk_reservation *,
- unsigned, 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)
static inline int bch2_disk_reservation_get(struct bch_fs *c,
struct disk_reservation *res,
- unsigned sectors,
- unsigned nr_replicas,
+ 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);
+}
+
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 *);
projects / bcachefs-tools-debian / blobdiff