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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_ALLOC_BACKGROUND_H
#define _BCACHEFS_ALLOC_BACKGROUND_H
#include "bcachefs.h"
#include "alloc_types.h"
#include "buckets.h"
#include "debug.h"
#include "super.h"
/* How out of date a pointer gen is allowed to be: */
#define BUCKET_GC_GEN_MAX 96U
static inline u8 alloc_gc_gen(struct bch_alloc_v4 a)
{
return a.gen - a.oldest_gen;
}
enum bucket_state {
BUCKET_free,
BUCKET_need_gc_gens,
BUCKET_need_discard,
BUCKET_cached,
BUCKET_dirty,
};
extern const char * const bch2_bucket_states[];
static inline enum bucket_state bucket_state(struct bch_alloc_v4 a)
{
if (a.dirty_sectors || a.stripe)
return BUCKET_dirty;
if (a.cached_sectors)
return BUCKET_cached;
BUG_ON(a.data_type);
if (BCH_ALLOC_V4_NEED_DISCARD(&a))
return BUCKET_need_discard;
if (alloc_gc_gen(a) >= BUCKET_GC_GEN_MAX)
return BUCKET_need_gc_gens;
return BUCKET_free;
}
static inline u64 alloc_lru_idx(struct bch_alloc_v4 a)
{
return bucket_state(a) == BUCKET_cached ? a.io_time[READ] : 0;
}
static inline u64 alloc_freespace_genbits(struct bch_alloc_v4 a)
{
return ((u64) alloc_gc_gen(a) >> 4) << 56;
}
static inline struct bpos alloc_freespace_pos(struct bpos pos, struct bch_alloc_v4 a)
{
pos.offset |= alloc_freespace_genbits(a);
return pos;
}
struct bkey_i_alloc_v4 *
bch2_trans_start_alloc_update(struct btree_trans *, struct btree_iter *, struct bpos);
void bch2_alloc_to_v4(struct bkey_s_c, struct bch_alloc_v4 *);
struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *, struct bkey_s_c);
int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int);
#define ALLOC_SCAN_BATCH(ca) max_t(size_t, 1, (ca)->mi.nbuckets >> 9)
const char *bch2_alloc_v1_invalid(const struct bch_fs *, struct bkey_s_c);
const char *bch2_alloc_v2_invalid(const struct bch_fs *, struct bkey_s_c);
const char *bch2_alloc_v3_invalid(const struct bch_fs *, struct bkey_s_c);
const char *bch2_alloc_v4_invalid(const struct bch_fs *, struct bkey_s_c k);
void bch2_alloc_v4_swab(struct bkey_s);
void bch2_alloc_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
#define bch2_bkey_ops_alloc (struct bkey_ops) { \
.key_invalid = bch2_alloc_v1_invalid, \
.val_to_text = bch2_alloc_to_text, \
.trans_trigger = bch2_trans_mark_alloc, \
.atomic_trigger = bch2_mark_alloc, \
}
#define bch2_bkey_ops_alloc_v2 (struct bkey_ops) { \
.key_invalid = bch2_alloc_v2_invalid, \
.val_to_text = bch2_alloc_to_text, \
.trans_trigger = bch2_trans_mark_alloc, \
.atomic_trigger = bch2_mark_alloc, \
}
#define bch2_bkey_ops_alloc_v3 (struct bkey_ops) { \
.key_invalid = bch2_alloc_v3_invalid, \
.val_to_text = bch2_alloc_to_text, \
.trans_trigger = bch2_trans_mark_alloc, \
.atomic_trigger = bch2_mark_alloc, \
}
#define bch2_bkey_ops_alloc_v4 (struct bkey_ops) { \
.key_invalid = bch2_alloc_v4_invalid, \
.val_to_text = bch2_alloc_to_text, \
.swab = bch2_alloc_v4_swab, \
.trans_trigger = bch2_trans_mark_alloc, \
.atomic_trigger = bch2_mark_alloc, \
}
static inline bool bkey_is_alloc(const struct bkey *k)
{
return k->type == KEY_TYPE_alloc ||
k->type == KEY_TYPE_alloc_v2 ||
k->type == KEY_TYPE_alloc_v3;
}
int bch2_alloc_read(struct bch_fs *, bool, bool);
int bch2_trans_mark_alloc(struct btree_trans *, struct bkey_s_c,
struct bkey_i *, unsigned);
void bch2_do_discards(struct bch_fs *);
int bch2_fs_freespace_init(struct bch_fs *);
void bch2_recalc_capacity(struct bch_fs *);
void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *);
void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *);
void bch2_fs_allocator_background_init(struct bch_fs *);
#endif /* _BCACHEFS_ALLOC_BACKGROUND_H */
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