232 lines
6.0 KiB
C
232 lines
6.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _BCACHEFS_SB_MEMBERS_H
|
|
#define _BCACHEFS_SB_MEMBERS_H
|
|
|
|
#include "darray.h"
|
|
|
|
extern char * const bch2_member_error_strs[];
|
|
|
|
static inline struct bch_member *
|
|
__bch2_members_v2_get_mut(struct bch_sb_field_members_v2 *mi, unsigned i)
|
|
{
|
|
return (void *) mi->_members + (i * le16_to_cpu(mi->member_bytes));
|
|
}
|
|
|
|
int bch2_sb_members_v2_init(struct bch_fs *c);
|
|
int bch2_sb_members_cpy_v2_v1(struct bch_sb_handle *disk_sb);
|
|
struct bch_member *bch2_members_v2_get_mut(struct bch_sb *sb, int i);
|
|
struct bch_member bch2_sb_member_get(struct bch_sb *sb, int i);
|
|
|
|
static inline bool bch2_dev_is_online(struct bch_dev *ca)
|
|
{
|
|
return !percpu_ref_is_zero(&ca->io_ref);
|
|
}
|
|
|
|
static inline bool bch2_dev_is_readable(struct bch_dev *ca)
|
|
{
|
|
return bch2_dev_is_online(ca) &&
|
|
ca->mi.state != BCH_MEMBER_STATE_failed;
|
|
}
|
|
|
|
static inline bool bch2_dev_get_ioref(struct bch_dev *ca, int rw)
|
|
{
|
|
if (!percpu_ref_tryget(&ca->io_ref))
|
|
return false;
|
|
|
|
if (ca->mi.state == BCH_MEMBER_STATE_rw ||
|
|
(ca->mi.state == BCH_MEMBER_STATE_ro && rw == READ))
|
|
return true;
|
|
|
|
percpu_ref_put(&ca->io_ref);
|
|
return false;
|
|
}
|
|
|
|
static inline unsigned dev_mask_nr(const struct bch_devs_mask *devs)
|
|
{
|
|
return bitmap_weight(devs->d, BCH_SB_MEMBERS_MAX);
|
|
}
|
|
|
|
static inline bool bch2_dev_list_has_dev(struct bch_devs_list devs,
|
|
unsigned dev)
|
|
{
|
|
darray_for_each(devs, i)
|
|
if (*i == dev)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline void bch2_dev_list_drop_dev(struct bch_devs_list *devs,
|
|
unsigned dev)
|
|
{
|
|
darray_for_each(*devs, i)
|
|
if (*i == dev) {
|
|
darray_remove_item(devs, i);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static inline void bch2_dev_list_add_dev(struct bch_devs_list *devs,
|
|
unsigned dev)
|
|
{
|
|
if (!bch2_dev_list_has_dev(*devs, dev)) {
|
|
BUG_ON(devs->nr >= ARRAY_SIZE(devs->data));
|
|
devs->data[devs->nr++] = dev;
|
|
}
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_dev_list_single(unsigned dev)
|
|
{
|
|
return (struct bch_devs_list) { .nr = 1, .data[0] = dev };
|
|
}
|
|
|
|
static inline struct bch_dev *__bch2_next_dev_idx(struct bch_fs *c, unsigned idx,
|
|
const struct bch_devs_mask *mask)
|
|
{
|
|
struct bch_dev *ca = NULL;
|
|
|
|
while ((idx = mask
|
|
? find_next_bit(mask->d, c->sb.nr_devices, idx)
|
|
: idx) < c->sb.nr_devices &&
|
|
!(ca = rcu_dereference_check(c->devs[idx],
|
|
lockdep_is_held(&c->state_lock))))
|
|
idx++;
|
|
|
|
return ca;
|
|
}
|
|
|
|
static inline struct bch_dev *__bch2_next_dev(struct bch_fs *c, struct bch_dev *ca,
|
|
const struct bch_devs_mask *mask)
|
|
{
|
|
return __bch2_next_dev_idx(c, ca ? ca->dev_idx + 1 : 0, mask);
|
|
}
|
|
|
|
#define for_each_member_device_rcu(_c, _ca, _mask) \
|
|
for (struct bch_dev *_ca = NULL; \
|
|
(_ca = __bch2_next_dev((_c), _ca, (_mask)));)
|
|
|
|
static inline struct bch_dev *bch2_get_next_dev(struct bch_fs *c, struct bch_dev *ca)
|
|
{
|
|
if (ca)
|
|
percpu_ref_put(&ca->ref);
|
|
|
|
rcu_read_lock();
|
|
if ((ca = __bch2_next_dev(c, ca, 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(_c, _ca) \
|
|
for (; (_ca = bch2_get_next_dev(_c, _ca));)
|
|
|
|
#define for_each_member_device(_c, _ca) \
|
|
for (struct bch_dev *_ca = NULL; \
|
|
(_ca = bch2_get_next_dev(_c, _ca));)
|
|
|
|
static inline struct bch_dev *bch2_get_next_online_dev(struct bch_fs *c,
|
|
struct bch_dev *ca,
|
|
unsigned state_mask)
|
|
{
|
|
if (ca)
|
|
percpu_ref_put(&ca->io_ref);
|
|
|
|
rcu_read_lock();
|
|
while ((ca = __bch2_next_dev(c, ca, NULL)) &&
|
|
(!((1 << ca->mi.state) & state_mask) ||
|
|
!percpu_ref_tryget(&ca->io_ref)))
|
|
;
|
|
rcu_read_unlock();
|
|
|
|
return ca;
|
|
}
|
|
|
|
#define __for_each_online_member(_c, _ca, state_mask) \
|
|
for (struct bch_dev *_ca = NULL; \
|
|
(_ca = bch2_get_next_online_dev(_c, _ca, state_mask));)
|
|
|
|
#define for_each_online_member(c, ca) \
|
|
__for_each_online_member(c, ca, ~0)
|
|
|
|
#define for_each_rw_member(c, ca) \
|
|
__for_each_online_member(c, ca, BIT(BCH_MEMBER_STATE_rw))
|
|
|
|
#define for_each_readable_member(c, ca) \
|
|
__for_each_online_member(c, ca, BIT( BCH_MEMBER_STATE_rw)|BIT(BCH_MEMBER_STATE_ro))
|
|
|
|
/*
|
|
* If a key exists that references a device, the device won't be going away and
|
|
* we can omit rcu_read_lock():
|
|
*/
|
|
static inline struct bch_dev *bch_dev_bkey_exists(const struct bch_fs *c, unsigned idx)
|
|
{
|
|
EBUG_ON(idx >= c->sb.nr_devices || !c->devs[idx]);
|
|
|
|
return rcu_dereference_check(c->devs[idx], 1);
|
|
}
|
|
|
|
static inline struct bch_dev *bch_dev_locked(struct bch_fs *c, unsigned idx)
|
|
{
|
|
EBUG_ON(idx >= c->sb.nr_devices || !c->devs[idx]);
|
|
|
|
return rcu_dereference_protected(c->devs[idx],
|
|
lockdep_is_held(&c->sb_lock) ||
|
|
lockdep_is_held(&c->state_lock));
|
|
}
|
|
|
|
/* 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;
|
|
|
|
memset(&devs, 0, sizeof(devs));
|
|
for_each_online_member(c, ca)
|
|
__set_bit(ca->dev_idx, devs.d);
|
|
return devs;
|
|
}
|
|
|
|
extern const struct bch_sb_field_ops bch_sb_field_ops_members_v1;
|
|
extern const struct bch_sb_field_ops bch_sb_field_ops_members_v2;
|
|
|
|
static inline bool bch2_member_exists(struct bch_member *m)
|
|
{
|
|
return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
|
|
}
|
|
|
|
static inline bool bch2_dev_exists(struct bch_sb *sb, unsigned dev)
|
|
{
|
|
if (dev < sb->nr_devices) {
|
|
struct bch_member m = bch2_sb_member_get(sb, dev);
|
|
return bch2_member_exists(&m);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
|
|
{
|
|
return (struct bch_member_cpu) {
|
|
.nbuckets = le64_to_cpu(mi->nbuckets),
|
|
.first_bucket = le16_to_cpu(mi->first_bucket),
|
|
.bucket_size = le16_to_cpu(mi->bucket_size),
|
|
.group = BCH_MEMBER_GROUP(mi),
|
|
.state = BCH_MEMBER_STATE(mi),
|
|
.discard = BCH_MEMBER_DISCARD(mi),
|
|
.data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
|
|
.durability = BCH_MEMBER_DURABILITY(mi)
|
|
? BCH_MEMBER_DURABILITY(mi) - 1
|
|
: 1,
|
|
.freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
|
|
.valid = bch2_member_exists(mi),
|
|
};
|
|
}
|
|
|
|
void bch2_sb_members_from_cpu(struct bch_fs *);
|
|
|
|
void bch2_dev_io_errors_to_text(struct printbuf *, struct bch_dev *);
|
|
void bch2_dev_errors_reset(struct bch_dev *);
|
|
|
|
#endif /* _BCACHEFS_SB_MEMBERS_H */
|