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#ifndef _BCACHE_ALLOC_H
#define _BCACHE_ALLOC_H
#include "alloc_types.h"
struct bkey;
struct bucket;
struct cache;
struct cache_set;
struct cache_group;
static inline size_t prios_per_bucket(const struct cache *ca)
{
return (bucket_bytes(ca) - sizeof(struct prio_set)) /
sizeof(struct bucket_disk);
}
static inline size_t prio_buckets(const struct cache *ca)
{
return DIV_ROUND_UP((size_t) (ca)->mi.nbuckets, prios_per_bucket(ca));
}
void bch_dev_group_remove(struct cache_group *, struct cache *);
void bch_dev_group_add(struct cache_group *, struct cache *);
int bch_prio_read(struct cache *);
void bch_recalc_min_prio(struct cache *, int);
size_t bch_bucket_alloc(struct cache *, enum alloc_reserve);
void bch_open_bucket_put(struct cache_set *, struct open_bucket *);
struct open_bucket *bch_alloc_sectors_start(struct cache_set *,
struct write_point *,
unsigned, unsigned,
enum alloc_reserve,
struct closure *);
void bch_alloc_sectors_append_ptrs(struct cache_set *, struct bkey_i_extent *,
unsigned, struct open_bucket *, unsigned);
void bch_alloc_sectors_done(struct cache_set *, struct write_point *,
struct open_bucket *);
struct open_bucket *bch_alloc_sectors(struct cache_set *, struct write_point *,
struct bkey_i_extent *, unsigned, unsigned,
enum alloc_reserve, struct closure *);
static inline void bch_wake_allocator(struct cache *ca)
{
struct task_struct *p;
rcu_read_lock();
if ((p = ACCESS_ONCE(ca->alloc_thread)))
wake_up_process(p);
rcu_read_unlock();
}
static inline struct cache *cache_group_next_rcu(struct cache_group *devs,
unsigned *iter)
{
struct cache *ret = NULL;
while (*iter < devs->nr &&
!(ret = rcu_dereference(devs->d[*iter].dev)))
(*iter)++;
return ret;
}
#define group_for_each_cache_rcu(ca, devs, iter) \
for ((iter) = 0; \
((ca) = cache_group_next_rcu((devs), &(iter))); \
(iter)++)
static inline struct cache *cache_group_next(struct cache_group *devs,
unsigned *iter)
{
struct cache *ret;
rcu_read_lock();
if ((ret = cache_group_next_rcu(devs, iter)))
percpu_ref_get(&ret->ref);
rcu_read_unlock();
return ret;
}
#define group_for_each_cache(ca, devs, iter) \
for ((iter) = 0; \
(ca = cache_group_next(devs, &(iter))); \
percpu_ref_put(&ca->ref), (iter)++)
#define __open_bucket_next_online_device(_c, _ob, _ptr, _ca) \
({ \
(_ca) = NULL; \
\
while ((_ptr) < (_ob)->ptrs + (_ob)->nr_ptrs && \
!((_ca) = PTR_CACHE(_c, _ptr))) \
(_ptr)++; \
(_ca); \
})
#define open_bucket_for_each_online_device(_c, _ob, _ptr, _ca) \
for ((_ptr) = (_ob)->ptrs; \
((_ca) = __open_bucket_next_online_device(_c, _ob, _ptr, _ca));\
(_ptr)++)
void bch_recalc_capacity(struct cache_set *);
void bch_dev_allocator_stop(struct cache *);
int bch_dev_allocator_start(struct cache *);
void bch_fs_allocator_init(struct cache_set *);
#endif /* _BCACHE_ALLOC_H */
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