275 lines
7.6 KiB
C
275 lines
7.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_ALLOC_BACKGROUND_H
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#define _BCACHEFS_ALLOC_BACKGROUND_H
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#include "bcachefs.h"
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#include "alloc_types.h"
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#include "buckets.h"
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#include "debug.h"
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#include "super.h"
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enum bkey_invalid_flags;
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/* How out of date a pointer gen is allowed to be: */
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#define BUCKET_GC_GEN_MAX 96U
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static inline bool bch2_dev_bucket_exists(struct bch_fs *c, struct bpos pos)
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{
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struct bch_dev *ca;
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if (!bch2_dev_exists2(c, pos.inode))
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return false;
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ca = bch_dev_bkey_exists(c, pos.inode);
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return pos.offset >= ca->mi.first_bucket &&
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pos.offset < ca->mi.nbuckets;
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}
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static inline u64 bucket_to_u64(struct bpos bucket)
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{
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return (bucket.inode << 48) | bucket.offset;
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}
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static inline struct bpos u64_to_bucket(u64 bucket)
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{
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return POS(bucket >> 48, bucket & ~(~0ULL << 48));
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}
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static inline u8 alloc_gc_gen(struct bch_alloc_v4 a)
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{
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return a.gen - a.oldest_gen;
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}
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static inline enum bch_data_type __alloc_data_type(u32 dirty_sectors,
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u32 cached_sectors,
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u32 stripe,
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struct bch_alloc_v4 a,
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enum bch_data_type data_type)
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{
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if (stripe)
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return data_type == BCH_DATA_parity ? data_type : BCH_DATA_stripe;
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if (dirty_sectors)
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return data_type;
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if (cached_sectors)
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return BCH_DATA_cached;
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if (BCH_ALLOC_V4_NEED_DISCARD(&a))
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return BCH_DATA_need_discard;
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if (alloc_gc_gen(a) >= BUCKET_GC_GEN_MAX)
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return BCH_DATA_need_gc_gens;
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return BCH_DATA_free;
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}
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static inline enum bch_data_type alloc_data_type(struct bch_alloc_v4 a,
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enum bch_data_type data_type)
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{
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return __alloc_data_type(a.dirty_sectors, a.cached_sectors,
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a.stripe, a, data_type);
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}
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static inline enum bch_data_type bucket_data_type(enum bch_data_type data_type)
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{
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return data_type == BCH_DATA_stripe ? BCH_DATA_user : data_type;
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}
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static inline unsigned bch2_bucket_sectors(struct bch_alloc_v4 a)
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{
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return a.dirty_sectors + a.cached_sectors;
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}
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static inline unsigned bch2_bucket_sectors_dirty(struct bch_alloc_v4 a)
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{
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return a.dirty_sectors;
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}
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static inline unsigned bch2_bucket_sectors_fragmented(struct bch_dev *ca,
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struct bch_alloc_v4 a)
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{
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int d = bch2_bucket_sectors_dirty(a);
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return d ? max(0, ca->mi.bucket_size - d) : 0;
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}
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static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a)
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{
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return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0;
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}
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#define DATA_TYPES_MOVABLE \
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((1U << BCH_DATA_btree)| \
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(1U << BCH_DATA_user)| \
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(1U << BCH_DATA_stripe))
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static inline bool data_type_movable(enum bch_data_type type)
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{
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return (1U << type) & DATA_TYPES_MOVABLE;
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}
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static inline u64 alloc_lru_idx_fragmentation(struct bch_alloc_v4 a,
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struct bch_dev *ca)
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{
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if (!data_type_movable(a.data_type) ||
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!bch2_bucket_sectors_fragmented(ca, a))
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return 0;
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u64 d = bch2_bucket_sectors_dirty(a);
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return div_u64(d * (1ULL << 31), ca->mi.bucket_size);
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}
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static inline u64 alloc_freespace_genbits(struct bch_alloc_v4 a)
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{
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return ((u64) alloc_gc_gen(a) >> 4) << 56;
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}
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static inline struct bpos alloc_freespace_pos(struct bpos pos, struct bch_alloc_v4 a)
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{
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pos.offset |= alloc_freespace_genbits(a);
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return pos;
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}
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static inline unsigned alloc_v4_u64s(const struct bch_alloc_v4 *a)
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{
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unsigned ret = (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?:
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BCH_ALLOC_V4_U64s_V0) +
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BCH_ALLOC_V4_NR_BACKPOINTERS(a) *
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(sizeof(struct bch_backpointer) / sizeof(u64));
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BUG_ON(ret > U8_MAX - BKEY_U64s);
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return ret;
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}
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static inline void set_alloc_v4_u64s(struct bkey_i_alloc_v4 *a)
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{
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set_bkey_val_u64s(&a->k, alloc_v4_u64s(&a->v));
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}
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struct bkey_i_alloc_v4 *
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bch2_trans_start_alloc_update(struct btree_trans *, struct btree_iter *, struct bpos);
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void __bch2_alloc_to_v4(struct bkey_s_c, struct bch_alloc_v4 *);
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static inline const struct bch_alloc_v4 *bch2_alloc_to_v4(struct bkey_s_c k, struct bch_alloc_v4 *convert)
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{
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const struct bch_alloc_v4 *ret;
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if (unlikely(k.k->type != KEY_TYPE_alloc_v4))
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goto slowpath;
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ret = bkey_s_c_to_alloc_v4(k).v;
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if (BCH_ALLOC_V4_BACKPOINTERS_START(ret) != BCH_ALLOC_V4_U64s)
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goto slowpath;
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return ret;
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slowpath:
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__bch2_alloc_to_v4(k, convert);
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return convert;
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}
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struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *, struct bkey_s_c);
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int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int);
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int bch2_alloc_v1_invalid(struct bch_fs *, struct bkey_s_c,
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enum bkey_invalid_flags, struct printbuf *);
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int bch2_alloc_v2_invalid(struct bch_fs *, struct bkey_s_c,
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enum bkey_invalid_flags, struct printbuf *);
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int bch2_alloc_v3_invalid(struct bch_fs *, struct bkey_s_c,
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enum bkey_invalid_flags, struct printbuf *);
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int bch2_alloc_v4_invalid(struct bch_fs *, struct bkey_s_c,
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enum bkey_invalid_flags, struct printbuf *);
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void bch2_alloc_v4_swab(struct bkey_s);
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void bch2_alloc_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
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#define bch2_bkey_ops_alloc ((struct bkey_ops) { \
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.key_invalid = bch2_alloc_v1_invalid, \
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.val_to_text = bch2_alloc_to_text, \
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.trigger = bch2_trigger_alloc, \
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.min_val_size = 8, \
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})
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#define bch2_bkey_ops_alloc_v2 ((struct bkey_ops) { \
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.key_invalid = bch2_alloc_v2_invalid, \
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.val_to_text = bch2_alloc_to_text, \
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.trigger = bch2_trigger_alloc, \
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.min_val_size = 8, \
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})
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#define bch2_bkey_ops_alloc_v3 ((struct bkey_ops) { \
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.key_invalid = bch2_alloc_v3_invalid, \
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.val_to_text = bch2_alloc_to_text, \
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.trigger = bch2_trigger_alloc, \
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.min_val_size = 16, \
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})
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#define bch2_bkey_ops_alloc_v4 ((struct bkey_ops) { \
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.key_invalid = bch2_alloc_v4_invalid, \
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.val_to_text = bch2_alloc_to_text, \
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.swab = bch2_alloc_v4_swab, \
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.trigger = bch2_trigger_alloc, \
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.min_val_size = 48, \
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})
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int bch2_bucket_gens_invalid(struct bch_fs *, struct bkey_s_c,
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enum bkey_invalid_flags, struct printbuf *);
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void bch2_bucket_gens_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
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#define bch2_bkey_ops_bucket_gens ((struct bkey_ops) { \
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.key_invalid = bch2_bucket_gens_invalid, \
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.val_to_text = bch2_bucket_gens_to_text, \
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})
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int bch2_bucket_gens_init(struct bch_fs *);
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static inline bool bkey_is_alloc(const struct bkey *k)
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{
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return k->type == KEY_TYPE_alloc ||
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k->type == KEY_TYPE_alloc_v2 ||
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k->type == KEY_TYPE_alloc_v3;
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}
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int bch2_alloc_read(struct bch_fs *);
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int bch2_trigger_alloc(struct btree_trans *, enum btree_id, unsigned,
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struct bkey_s_c, struct bkey_s, unsigned);
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int bch2_check_alloc_info(struct bch_fs *);
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int bch2_check_alloc_to_lru_refs(struct bch_fs *);
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void bch2_do_discards(struct bch_fs *);
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static inline u64 should_invalidate_buckets(struct bch_dev *ca,
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struct bch_dev_usage u)
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{
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u64 want_free = ca->mi.nbuckets >> 7;
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u64 free = max_t(s64, 0,
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u.d[BCH_DATA_free].buckets
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+ u.d[BCH_DATA_need_discard].buckets
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- bch2_dev_buckets_reserved(ca, BCH_WATERMARK_stripe));
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return clamp_t(s64, want_free - free, 0, u.d[BCH_DATA_cached].buckets);
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}
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void bch2_do_invalidates(struct bch_fs *);
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static inline struct bch_backpointer *alloc_v4_backpointers(struct bch_alloc_v4 *a)
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{
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return (void *) ((u64 *) &a->v +
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(BCH_ALLOC_V4_BACKPOINTERS_START(a) ?:
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BCH_ALLOC_V4_U64s_V0));
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}
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static inline const struct bch_backpointer *alloc_v4_backpointers_c(const struct bch_alloc_v4 *a)
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{
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return (void *) ((u64 *) &a->v + BCH_ALLOC_V4_BACKPOINTERS_START(a));
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}
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int bch2_dev_freespace_init(struct bch_fs *, struct bch_dev *, u64, u64);
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int bch2_fs_freespace_init(struct bch_fs *);
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void bch2_recalc_capacity(struct bch_fs *);
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u64 bch2_min_rw_member_capacity(struct bch_fs *);
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void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *);
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void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *);
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void bch2_fs_allocator_background_init(struct bch_fs *);
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#endif /* _BCACHEFS_ALLOC_BACKGROUND_H */
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