mirror of
https://github.com/koverstreet/bcachefs-tools.git
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137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
#ifndef _BCACHE_SUPER_H
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#define _BCACHE_SUPER_H
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#include "extents.h"
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#include <linux/bcache-ioctl.h>
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static inline size_t sector_to_bucket(const struct bch_dev *ca, sector_t s)
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{
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return s >> ca->bucket_bits;
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}
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static inline sector_t bucket_to_sector(const struct bch_dev *ca, size_t b)
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{
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return ((sector_t) b) << ca->bucket_bits;
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}
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static inline sector_t bucket_remainder(const struct bch_dev *ca, sector_t s)
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{
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return s & (ca->mi.bucket_size - 1);
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}
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static inline struct bch_dev *__bch_next_dev(struct bch_fs *c, unsigned *iter)
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{
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struct bch_dev *ca = NULL;
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while (*iter < c->sb.nr_devices &&
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!(ca = rcu_dereference_check(c->devs[*iter],
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lockdep_is_held(&c->state_lock))))
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(*iter)++;
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return ca;
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}
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#define __for_each_member_device(ca, c, iter) \
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for ((iter) = 0; ((ca) = __bch_next_dev((c), &(iter))); (iter)++)
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#define for_each_member_device_rcu(ca, c, iter) \
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__for_each_member_device(ca, c, iter)
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static inline struct bch_dev *bch_get_next_dev(struct bch_fs *c, unsigned *iter)
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{
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struct bch_dev *ca;
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rcu_read_lock();
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if ((ca = __bch_next_dev(c, iter)))
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percpu_ref_get(&ca->ref);
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rcu_read_unlock();
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return ca;
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}
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/*
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* If you break early, you must drop your ref on the current device
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*/
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#define for_each_member_device(ca, c, iter) \
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for ((iter) = 0; \
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(ca = bch_get_next_dev(c, &(iter))); \
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percpu_ref_put(&ca->ref), (iter)++)
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static inline struct bch_dev *bch_get_next_online_dev(struct bch_fs *c,
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unsigned *iter,
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int state_mask)
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{
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struct bch_dev *ca;
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rcu_read_lock();
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while ((ca = __bch_next_dev(c, iter)) &&
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(!((1 << ca->mi.state) & state_mask) ||
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!percpu_ref_tryget(&ca->io_ref)))
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(*iter)++;
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rcu_read_unlock();
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return ca;
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}
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#define __for_each_online_member(ca, c, iter, state_mask) \
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for ((iter) = 0; \
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(ca = bch_get_next_online_dev(c, &(iter), state_mask)); \
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percpu_ref_put(&ca->io_ref), (iter)++)
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#define for_each_online_member(ca, c, iter) \
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__for_each_online_member(ca, c, iter, ~0)
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#define for_each_rw_member(ca, c, iter) \
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__for_each_online_member(ca, c, iter, 1 << BCH_MEMBER_STATE_RW)
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#define for_each_readable_member(ca, c, iter) \
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__for_each_online_member(ca, c, iter, \
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(1 << BCH_MEMBER_STATE_RW)|(1 << BCH_MEMBER_STATE_RO))
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struct bch_fs *bch_bdev_to_fs(struct block_device *);
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struct bch_fs *bch_uuid_to_fs(uuid_le);
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int bch_congested(struct bch_fs *, int);
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void bch_dev_release(struct kobject *);
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bool bch_dev_state_allowed(struct bch_fs *, struct bch_dev *,
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enum bch_member_state, int);
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int __bch_dev_set_state(struct bch_fs *, struct bch_dev *,
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enum bch_member_state, int);
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int bch_dev_set_state(struct bch_fs *, struct bch_dev *,
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enum bch_member_state, int);
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int bch_dev_fail(struct bch_dev *, int);
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int bch_dev_remove(struct bch_fs *, struct bch_dev *, int);
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int bch_dev_add(struct bch_fs *, const char *);
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int bch_dev_online(struct bch_fs *, const char *);
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int bch_dev_offline(struct bch_fs *, struct bch_dev *, int);
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int bch_dev_migrate(struct bch_fs *, struct bch_dev *);
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void bch_fs_detach(struct bch_fs *);
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bool bch_fs_emergency_read_only(struct bch_fs *);
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void bch_fs_read_only(struct bch_fs *);
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const char *bch_fs_read_write(struct bch_fs *);
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void bch_fs_release(struct kobject *);
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void bch_fs_stop_async(struct bch_fs *);
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void bch_fs_stop(struct bch_fs *);
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const char *bch_fs_start(struct bch_fs *);
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const char *bch_fs_open(char * const *, unsigned, struct bch_opts,
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struct bch_fs **);
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const char *bch_fs_open_incremental(const char *path);
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extern struct workqueue_struct *bcache_io_wq;
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extern struct crypto_shash *bch_sha256;
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extern struct kobj_type bch_fs_ktype;
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extern struct kobj_type bch_fs_internal_ktype;
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extern struct kobj_type bch_fs_time_stats_ktype;
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extern struct kobj_type bch_fs_opts_dir_ktype;
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extern struct kobj_type bch_dev_ktype;
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#endif /* _BCACHE_SUPER_H */
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