X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Fbuckets.h;h=853bc9dd129440e56bb5d7ed935ff8ce9ef1f7a5;hb=70f2681838973f20a918b518f82d382b3556963d;hp=5ed9441cb115f5e2f7a74126b4b987464f8aad4b;hpb=9a058f14283a3591a8b173a667d0b43a8b34c0ae;p=bcachefs-tools-debian diff --git a/libbcachefs/buckets.h b/libbcachefs/buckets.h index 5ed9441..853bc9d 100644 --- a/libbcachefs/buckets.h +++ b/libbcachefs/buckets.h @@ -15,57 +15,49 @@ for (_b = (_buckets)->b + (_buckets)->first_bucket; \ _b < (_buckets)->b + (_buckets)->nbuckets; _b++) -#define bucket_cmpxchg(g, new, expr) \ -({ \ - struct bucket *_g = g; \ - 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; \ -}) - -static inline struct bucket_array *__bucket_array(struct bch_dev *ca, - bool gc) +static inline void bucket_unlock(struct bucket *b) { - return rcu_dereference_check(ca->buckets[gc], + smp_store_release(&b->lock, 0); +} + +static inline void bucket_lock(struct bucket *b) +{ + while (xchg(&b->lock, 1)) + cpu_relax(); +} + +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->mark_lock) || lockdep_is_held(&ca->fs->gc_lock) || lockdep_is_held(&ca->bucket_lock)); } -static inline struct bucket_array *bucket_array(struct bch_dev *ca) +static inline struct bucket *gc_bucket(struct bch_dev *ca, size_t b) { - return __bucket_array(ca, false); -} - -static inline struct bucket *__bucket(struct bch_dev *ca, size_t b, bool gc) -{ - struct bucket_array *buckets = __bucket_array(ca, gc); + struct bucket_array *buckets = gc_bucket_array(ca); BUG_ON(b < buckets->first_bucket || b >= buckets->nbuckets); return buckets->b + b; } -static inline struct bucket *bucket(struct bch_dev *ca, size_t b) +static inline struct bucket_gens *bucket_gens(struct bch_dev *ca) { - return __bucket(ca, b, false); + 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)); } -/* - * 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 bucket *g) +static inline u8 *bucket_gen(struct bch_dev *ca, size_t b) { - return g->mark.gen - g->oldest_gen; + struct bucket_gens *gens = bucket_gens(ca); + + 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, @@ -74,11 +66,18 @@ 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, - bool gc) +static inline struct bpos PTR_BUCKET_POS(const struct bch_fs *c, + const struct bch_extent_ptr *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 *PTR_GC_BUCKET(struct bch_dev *ca, + const struct bch_extent_ptr *ptr) { - return __bucket(ca, PTR_BUCKET_NR(ca, ptr), gc); + return gc_bucket(ca, PTR_BUCKET_NR(ca, ptr)); } static inline enum bch_data_type ptr_data_type(const struct bkey *k, @@ -91,18 +90,6 @@ static inline enum bch_data_type ptr_data_type(const struct bkey *k, return ptr->cached ? BCH_DATA_cached : BCH_DATA_user; } -static inline struct bucket_mark ptr_bucket_mark(struct bch_dev *ca, - const struct bch_extent_ptr *ptr) -{ - struct bucket_mark m; - - rcu_read_lock(); - m = READ_ONCE(PTR_BUCKET(ca, ptr, 0)->mark); - rcu_read_unlock(); - - return m; -} - static inline int gen_cmp(u8 a, u8 b) { return (s8) (a - b); @@ -122,26 +109,13 @@ static inline int gen_after(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 */ - -static inline unsigned bucket_sectors_used(struct bucket_mark mark) -{ - return mark.dirty_sectors + mark.cached_sectors; -} + u8 ret; -static inline bool is_available_bucket(struct bucket_mark mark) -{ - return !mark.dirty_sectors && !mark.stripe; -} + rcu_read_lock(); + ret = gen_after(*bucket_gen(ca, PTR_BUCKET_NR(ca, ptr)), ptr->gen); + rcu_read_unlock(); -static inline bool bucket_needs_journal_commit(struct bucket_mark m, - u16 last_seq_ondisk) -{ - return m.journal_seq_valid && - ((s16) m.journal_seq - (s16) last_seq_ondisk > 0); + return ret; } /* Device usage: */ @@ -149,50 +123,50 @@ static inline bool bucket_needs_journal_commit(struct bucket_mark m, struct bch_dev_usage bch2_dev_usage_read(struct bch_dev *); static inline u64 __dev_buckets_available(struct bch_dev *ca, - struct bch_dev_usage stats) + struct bch_dev_usage stats, + enum alloc_reserve reserve) { - u64 total = ca->mi.nbuckets - ca->mi.first_bucket; + s64 total = ca->mi.nbuckets - ca->mi.first_bucket; + s64 reserved = 0; + + switch (reserve) { + case RESERVE_none: + reserved += ca->mi.nbuckets >> 6; + fallthrough; + case RESERVE_movinggc: + reserved += ca->nr_btree_reserve; + fallthrough; + case RESERVE_btree: + reserved += ca->nr_btree_reserve; + fallthrough; + case RESERVE_btree_movinggc: + break; + default: + BUG(); + } if (WARN_ONCE(stats.buckets_unavailable > total, "buckets_unavailable overflow (%llu > %llu)\n", stats.buckets_unavailable, total)) return 0; - return total - stats.buckets_unavailable; + return max_t(s64, 0, + total - + stats.buckets_unavailable - + ca->nr_open_buckets - + reserved); } -static inline u64 dev_buckets_available(struct bch_dev *ca) +static inline u64 dev_buckets_available(struct bch_dev *ca, + enum alloc_reserve reserve) { - return __dev_buckets_available(ca, bch2_dev_usage_read(ca)); -} - -static inline u64 __dev_buckets_reclaimable(struct bch_dev *ca, - struct bch_dev_usage stats) -{ - struct bch_fs *c = ca->fs; - s64 available = __dev_buckets_available(ca, stats); - unsigned i; - - spin_lock(&c->freelist_lock); - for (i = 0; i < RESERVE_NR; i++) - available -= fifo_used(&ca->free[i]); - available -= fifo_used(&ca->free_inc); - available -= ca->nr_open_buckets; - spin_unlock(&c->freelist_lock); - - return max(available, 0LL); -} - -static inline u64 dev_buckets_reclaimable(struct bch_dev *ca) -{ - return __dev_buckets_reclaimable(ca, bch2_dev_usage_read(ca)); + return __dev_buckets_available(ca, bch2_dev_usage_read(ca), reserve); } /* Filesystem usage: */ static inline unsigned fs_usage_u64s(struct bch_fs *c) { - return sizeof(struct bch_fs_usage) / sizeof(u64) + READ_ONCE(c->replicas.nr); } @@ -218,22 +192,55 @@ bch2_fs_usage_read_short(struct bch_fs *); /* key/bucket marking: */ -void bch2_bucket_seq_cleanup(struct bch_fs *); void bch2_fs_usage_initialize(struct bch_fs *); -void bch2_mark_alloc_bucket(struct bch_fs *, struct bch_dev *, size_t, bool); void bch2_mark_metadata_bucket(struct bch_fs *, struct bch_dev *, size_t, enum bch_data_type, unsigned, struct gc_pos, unsigned); -int bch2_mark_key(struct btree_trans *, struct bkey_s_c, 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_update(struct btree_trans *, struct btree_path *, - struct bkey_i *, unsigned); +int bch2_trans_mark_extent(struct btree_trans *, struct bkey_s_c, struct bkey_i *, unsigned); +int bch2_trans_mark_stripe(struct btree_trans *, struct bkey_s_c, struct bkey_i *, unsigned); +int bch2_trans_mark_inode(struct btree_trans *, struct bkey_s_c, struct bkey_i *, unsigned); +int bch2_trans_mark_reservation(struct btree_trans *, struct bkey_s_c, struct bkey_i *, unsigned); +int bch2_trans_mark_reflink_p(struct btree_trans *, struct bkey_s_c, struct bkey_i *, unsigned); + +int bch2_mark_key(struct btree_trans *, struct bkey_s_c, struct bkey_s_c, unsigned); int bch2_trans_mark_key(struct btree_trans *, struct bkey_s_c, - struct bkey_s_c, unsigned); -void bch2_trans_fs_usage_apply(struct btree_trans *, struct replicas_delta_list *); + struct bkey_i *, unsigned); + +static inline int bch2_trans_mark_old(struct btree_trans *trans, + struct bkey_s_c old, unsigned flags) +{ + struct bkey_i deleted; + + bkey_init(&deleted.k); + deleted.k.p = old.k->p; + + return bch2_trans_mark_key(trans, old, &deleted, + BTREE_TRIGGER_OVERWRITE|flags); +} + +static inline int bch2_trans_mark_new(struct btree_trans *trans, + struct bkey_i *new, unsigned flags) +{ + struct bkey_i deleted; + + bkey_init(&deleted.k); + deleted.k.p = new->k.p; + + return bch2_trans_mark_key(trans, bkey_i_to_s_c(&deleted), new, + BTREE_TRIGGER_INSERT|flags); +} + +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);