mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-02 00:00:03 +03:00
268 lines
6.5 KiB
C
268 lines
6.5 KiB
C
/*
|
|
* Code for manipulating bucket marks for garbage collection.
|
|
*
|
|
* Copyright 2014 Datera, Inc.
|
|
*/
|
|
|
|
#ifndef _BUCKETS_H
|
|
#define _BUCKETS_H
|
|
|
|
#include "buckets_types.h"
|
|
#include "super.h"
|
|
|
|
#define for_each_bucket(b, ca) \
|
|
for (b = (ca)->buckets + (ca)->mi.first_bucket; \
|
|
b < (ca)->buckets + (ca)->mi.nbuckets; b++)
|
|
|
|
#define bucket_cmpxchg(g, new, expr) \
|
|
({ \
|
|
u64 _v = READ_ONCE((g)->_mark.counter); \
|
|
struct bucket_mark _old; \
|
|
\
|
|
do { \
|
|
(new).counter = _old.counter = _v; \
|
|
expr; \
|
|
} while ((_v = cmpxchg(&(g)->_mark.counter, \
|
|
_old.counter, \
|
|
(new).counter)) != _old.counter);\
|
|
_old; \
|
|
})
|
|
|
|
/*
|
|
* 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, struct bucket *g)
|
|
{
|
|
unsigned long r = g - ca->buckets;
|
|
return g->mark.gen - ca->oldest_gens[r];
|
|
}
|
|
|
|
static inline size_t PTR_BUCKET_NR(const struct bch_dev *ca,
|
|
const struct bch_extent_ptr *ptr)
|
|
{
|
|
return sector_to_bucket(ca, ptr->offset);
|
|
}
|
|
|
|
/*
|
|
* Returns 0 if no pointers or device offline - only for tracepoints!
|
|
*/
|
|
static inline size_t PTR_BUCKET_NR_TRACE(const struct bch_fs *c,
|
|
const struct bkey_i *k,
|
|
unsigned ptr)
|
|
{
|
|
size_t bucket = 0;
|
|
#if 0
|
|
if (bkey_extent_is_data(&k->k)) {
|
|
const struct bch_extent_ptr *ptr;
|
|
|
|
extent_for_each_ptr(bkey_i_to_s_c_extent(k), ptr) {
|
|
const struct bch_dev *ca = c->devs[ptr->dev];
|
|
bucket = PTR_BUCKET_NR(ca, ptr);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
return bucket;
|
|
}
|
|
|
|
static inline struct bucket *PTR_BUCKET(const struct bch_dev *ca,
|
|
const struct bch_extent_ptr *ptr)
|
|
{
|
|
return ca->buckets + PTR_BUCKET_NR(ca, ptr);
|
|
}
|
|
|
|
static inline u8 __gen_after(u8 a, u8 b)
|
|
{
|
|
u8 r = a - b;
|
|
|
|
return r > 128U ? 0 : r;
|
|
}
|
|
|
|
static inline u8 gen_after(u8 a, u8 b)
|
|
{
|
|
u8 r = a - b;
|
|
|
|
BUG_ON(r > 128U);
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* ptr_stale() - check if a pointer points into a bucket that has been
|
|
* invalidated.
|
|
*/
|
|
static inline u8 ptr_stale(const struct bch_dev *ca,
|
|
const struct bch_extent_ptr *ptr)
|
|
{
|
|
return gen_after(PTR_BUCKET(ca, ptr)->mark.gen, ptr->gen);
|
|
}
|
|
|
|
/* bucket heaps */
|
|
|
|
static inline bool bucket_min_cmp(struct bucket_heap_entry l,
|
|
struct bucket_heap_entry r)
|
|
{
|
|
return l.val < r.val;
|
|
}
|
|
|
|
static inline bool bucket_max_cmp(struct bucket_heap_entry l,
|
|
struct bucket_heap_entry r)
|
|
{
|
|
return l.val > r.val;
|
|
}
|
|
|
|
static inline void bucket_heap_push(struct bch_dev *ca, struct bucket *g,
|
|
unsigned long val)
|
|
{
|
|
struct bucket_heap_entry new = { g, val };
|
|
|
|
if (!heap_full(&ca->heap))
|
|
heap_add(&ca->heap, new, bucket_min_cmp);
|
|
else if (bucket_min_cmp(new, heap_peek(&ca->heap))) {
|
|
ca->heap.data[0] = new;
|
|
heap_sift(&ca->heap, 0, bucket_min_cmp);
|
|
}
|
|
}
|
|
|
|
/* bucket gc marks */
|
|
|
|
/* 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)
|
|
|
|
static inline bool bucket_unused(struct bucket *g)
|
|
{
|
|
return !g->mark.counter;
|
|
}
|
|
|
|
static inline unsigned bucket_sectors_used(struct bucket *g)
|
|
{
|
|
return g->mark.dirty_sectors + g->mark.cached_sectors;
|
|
}
|
|
|
|
/* Per device stats: */
|
|
|
|
struct bch_dev_usage __bch_dev_usage_read(struct bch_dev *);
|
|
struct bch_dev_usage bch_dev_usage_read(struct bch_dev *);
|
|
|
|
static inline u64 __dev_buckets_available(struct bch_dev *ca,
|
|
struct bch_dev_usage stats)
|
|
{
|
|
return max_t(s64, 0,
|
|
ca->mi.nbuckets - ca->mi.first_bucket -
|
|
stats.buckets_dirty -
|
|
stats.buckets_alloc -
|
|
stats.buckets_meta);
|
|
}
|
|
|
|
/*
|
|
* Number of reclaimable buckets - only for use by the allocator thread:
|
|
*/
|
|
static inline u64 dev_buckets_available(struct bch_dev *ca)
|
|
{
|
|
return __dev_buckets_available(ca, bch_dev_usage_read(ca));
|
|
}
|
|
|
|
static inline u64 __dev_buckets_free(struct bch_dev *ca,
|
|
struct bch_dev_usage stats)
|
|
{
|
|
return __dev_buckets_available(ca, stats) +
|
|
fifo_used(&ca->free[RESERVE_NONE]) +
|
|
fifo_used(&ca->free_inc);
|
|
}
|
|
|
|
static inline u64 dev_buckets_free(struct bch_dev *ca)
|
|
{
|
|
return __dev_buckets_free(ca, bch_dev_usage_read(ca));
|
|
}
|
|
|
|
/* Cache set stats: */
|
|
|
|
struct bch_fs_usage __bch_fs_usage_read(struct bch_fs *);
|
|
struct bch_fs_usage bch_fs_usage_read(struct bch_fs *);
|
|
void bch_fs_usage_apply(struct bch_fs *, struct bch_fs_usage *,
|
|
struct disk_reservation *, struct gc_pos);
|
|
|
|
static inline u64 __bch_fs_sectors_used(struct bch_fs *c)
|
|
{
|
|
struct bch_fs_usage stats = __bch_fs_usage_read(c);
|
|
u64 reserved = stats.persistent_reserved +
|
|
stats.online_reserved;
|
|
|
|
return stats.s[S_COMPRESSED][S_META] +
|
|
stats.s[S_COMPRESSED][S_DIRTY] +
|
|
reserved +
|
|
(reserved >> 7);
|
|
}
|
|
|
|
static inline u64 bch_fs_sectors_used(struct bch_fs *c)
|
|
{
|
|
return min(c->capacity, __bch_fs_sectors_used(c));
|
|
}
|
|
|
|
/* XXX: kill? */
|
|
static inline u64 sectors_available(struct bch_fs *c)
|
|
{
|
|
struct bch_dev *ca;
|
|
unsigned i;
|
|
u64 ret = 0;
|
|
|
|
rcu_read_lock();
|
|
for_each_member_device_rcu(ca, c, i)
|
|
ret += dev_buckets_available(ca) << ca->bucket_bits;
|
|
rcu_read_unlock();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline bool is_available_bucket(struct bucket_mark mark)
|
|
{
|
|
return (!mark.owned_by_allocator &&
|
|
mark.data_type == BUCKET_DATA &&
|
|
!mark.dirty_sectors &&
|
|
!mark.nouse);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void bch_bucket_seq_cleanup(struct bch_fs *);
|
|
|
|
void bch_invalidate_bucket(struct bch_dev *, struct bucket *);
|
|
void bch_mark_free_bucket(struct bch_dev *, struct bucket *);
|
|
void bch_mark_alloc_bucket(struct bch_dev *, struct bucket *, bool);
|
|
void bch_mark_metadata_bucket(struct bch_dev *, struct bucket *,
|
|
enum bucket_data_type, bool);
|
|
|
|
void __bch_gc_mark_key(struct bch_fs *, struct bkey_s_c, s64, bool,
|
|
struct bch_fs_usage *);
|
|
void bch_gc_mark_key(struct bch_fs *, struct bkey_s_c, s64, bool);
|
|
void bch_mark_key(struct bch_fs *, struct bkey_s_c, s64, bool,
|
|
struct gc_pos, struct bch_fs_usage *, u64);
|
|
|
|
void bch_recalc_sectors_available(struct bch_fs *);
|
|
|
|
void bch_disk_reservation_put(struct bch_fs *,
|
|
struct disk_reservation *);
|
|
|
|
#define BCH_DISK_RESERVATION_NOFAIL (1 << 0)
|
|
#define BCH_DISK_RESERVATION_METADATA (1 << 1)
|
|
#define BCH_DISK_RESERVATION_GC_LOCK_HELD (1 << 2)
|
|
#define BCH_DISK_RESERVATION_BTREE_LOCKS_HELD (1 << 3)
|
|
|
|
int bch_disk_reservation_add(struct bch_fs *,
|
|
struct disk_reservation *,
|
|
unsigned, int);
|
|
int bch_disk_reservation_get(struct bch_fs *,
|
|
struct disk_reservation *,
|
|
unsigned, int);
|
|
|
|
#endif /* _BUCKETS_H */
|