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#ifndef _BCACHEFS_SUPER_H
#define _BCACHEFS_SUPER_H
#include "extents.h"
#include "bcachefs_ioctl.h"
#include <linux/math64.h>
static inline size_t sector_to_bucket(const struct bch_dev *ca, sector_t s)
{
return div_u64(s, ca->mi.bucket_size);
}
static inline sector_t bucket_to_sector(const struct bch_dev *ca, size_t b)
{
return ((sector_t) b) * ca->mi.bucket_size;
}
static inline sector_t bucket_remainder(const struct bch_dev *ca, sector_t s)
{
u32 remainder;
div_u64_rem(s, ca->mi.bucket_size, &remainder);
return remainder;
}
static inline bool bch2_dev_is_online(struct bch_dev *ca)
{
return !percpu_ref_is_zero(&ca->io_ref);
}
static inline unsigned dev_mask_nr(struct bch_devs_mask *devs)
{
return bitmap_weight(devs->d, BCH_SB_MEMBERS_MAX);
}
static inline struct bch_dev *__bch2_next_dev(struct bch_fs *c, unsigned *iter,
struct bch_devs_mask *mask)
{
struct bch_dev *ca = NULL;
while ((*iter = mask
? find_next_bit(mask->d, c->sb.nr_devices, *iter)
: *iter) < c->sb.nr_devices &&
!(ca = rcu_dereference_check(c->devs[*iter],
lockdep_is_held(&c->state_lock))))
(*iter)++;
return ca;
}
#define __for_each_member_device(ca, c, iter, mask) \
for ((iter) = 0; ((ca) = __bch2_next_dev((c), &(iter), mask)); (iter)++)
#define for_each_member_device_rcu(ca, c, iter, mask) \
__for_each_member_device(ca, c, iter, mask)
static inline struct bch_dev *bch2_get_next_dev(struct bch_fs *c, unsigned *iter)
{
struct bch_dev *ca;
rcu_read_lock();
if ((ca = __bch2_next_dev(c, iter, NULL)))
percpu_ref_get(&ca->ref);
rcu_read_unlock();
return ca;
}
/*
* If you break early, you must drop your ref on the current device
*/
#define for_each_member_device(ca, c, iter) \
for ((iter) = 0; \
(ca = bch2_get_next_dev(c, &(iter))); \
percpu_ref_put(&ca->ref), (iter)++)
static inline struct bch_dev *bch2_get_next_online_dev(struct bch_fs *c,
unsigned *iter,
int state_mask)
{
struct bch_dev *ca;
rcu_read_lock();
while ((ca = __bch2_next_dev(c, iter, NULL)) &&
(!((1 << ca->mi.state) & state_mask) ||
!percpu_ref_tryget(&ca->io_ref)))
(*iter)++;
rcu_read_unlock();
return ca;
}
#define __for_each_online_member(ca, c, iter, state_mask) \
for ((iter) = 0; \
(ca = bch2_get_next_online_dev(c, &(iter), state_mask)); \
percpu_ref_put(&ca->io_ref), (iter)++)
#define for_each_online_member(ca, c, iter) \
__for_each_online_member(ca, c, iter, ~0)
#define for_each_rw_member(ca, c, iter) \
__for_each_online_member(ca, c, iter, 1 << BCH_MEMBER_STATE_RW)
#define for_each_readable_member(ca, c, iter) \
__for_each_online_member(ca, c, iter, \
(1 << BCH_MEMBER_STATE_RW)|(1 << BCH_MEMBER_STATE_RO))
/* XXX kill, move to struct bch_fs */
static inline struct bch_devs_mask bch2_online_devs(struct bch_fs *c)
{
struct bch_devs_mask devs;
struct bch_dev *ca;
unsigned i;
memset(&devs, 0, sizeof(devs));
for_each_online_member(ca, c, i)
__set_bit(ca->dev_idx, devs.d);
return devs;
}
struct bch_fs *bch2_bdev_to_fs(struct block_device *);
struct bch_fs *bch2_uuid_to_fs(uuid_le);
int bch2_congested(struct bch_fs *, int);
bool bch2_dev_state_allowed(struct bch_fs *, struct bch_dev *,
enum bch_member_state, int);
int __bch2_dev_set_state(struct bch_fs *, struct bch_dev *,
enum bch_member_state, int);
int bch2_dev_set_state(struct bch_fs *, struct bch_dev *,
enum bch_member_state, int);
int bch2_dev_fail(struct bch_dev *, int);
int bch2_dev_remove(struct bch_fs *, struct bch_dev *, int);
int bch2_dev_add(struct bch_fs *, const char *);
int bch2_dev_online(struct bch_fs *, const char *);
int bch2_dev_offline(struct bch_fs *, struct bch_dev *, int);
int bch2_dev_evacuate(struct bch_fs *, struct bch_dev *);
bool bch2_fs_emergency_read_only(struct bch_fs *);
void bch2_fs_read_only(struct bch_fs *);
const char *bch2_fs_read_write(struct bch_fs *);
void bch2_fs_stop(struct bch_fs *);
const char *bch2_fs_start(struct bch_fs *);
const char *bch2_fs_open(char * const *, unsigned, struct bch_opts,
struct bch_fs **);
const char *bch2_fs_open_incremental(const char *path);
#endif /* _BCACHEFS_SUPER_H */
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