/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SB_MEMBERS_H
#define _BCACHEFS_SB_MEMBERS_H
#include "darray.h"
#include "bkey_types.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 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 void bch2_dev_get(struct bch_dev *ca)
{
#ifdef CONFIG_BCACHEFS_DEBUG
BUG_ON(atomic_long_inc_return(&ca->ref) <= 1L);
#else
percpu_ref_get(&ca->ref);
#endif
}
static inline void __bch2_dev_put(struct bch_dev *ca)
{
#ifdef CONFIG_BCACHEFS_DEBUG
long r = atomic_long_dec_return(&ca->ref);
if (r < (long) !ca->dying)
panic("bch_dev->ref underflow, last put: %pS\n", (void *) ca->last_put);
ca->last_put = _THIS_IP_;
if (!r)
complete(&ca->ref_completion);
#else
percpu_ref_put(&ca->ref);
#endif
}
static inline void bch2_dev_put(struct bch_dev *ca)
{
if (ca)
__bch2_dev_put(ca);
}
static inline struct bch_dev *bch2_get_next_dev(struct bch_fs *c, struct bch_dev *ca)
{
rcu_read_lock();
bch2_dev_put(ca);
if ((ca = __bch2_next_dev(c, ca, NULL)))
bch2_dev_get(ca);
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)
{
rcu_read_lock();
if (ca)
percpu_ref_put(&ca->io_ref);
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))
static inline bool bch2_dev_exists(const struct bch_fs *c, unsigned dev)
{
return dev < c->sb.nr_devices && c->devs[dev];
}
static inline bool bucket_valid(const struct bch_dev *ca, u64 b)
{
return b - ca->mi.first_bucket < ca->mi.nbuckets_minus_first;
}
static inline struct bch_dev *bch2_dev_have_ref(const struct bch_fs *c, unsigned dev)
{
EBUG_ON(!bch2_dev_exists(c, dev));
return rcu_dereference_check(c->devs[dev], 1);
}
static inline struct bch_dev *bch2_dev_locked(struct bch_fs *c, unsigned dev)
{
EBUG_ON(!bch2_dev_exists(c, dev));
return rcu_dereference_protected(c->devs[dev],
lockdep_is_held(&c->sb_lock) ||
lockdep_is_held(&c->state_lock));
}
static inline struct bch_dev *bch2_dev_rcu_noerror(struct bch_fs *c, unsigned dev)
{
return c && dev < c->sb.nr_devices
? rcu_dereference(c->devs[dev])
: NULL;
}
void bch2_dev_missing(struct bch_fs *, unsigned);
static inline struct bch_dev *bch2_dev_rcu(struct bch_fs *c, unsigned dev)
{
struct bch_dev *ca = bch2_dev_rcu_noerror(c, dev);
if (unlikely(!ca))
bch2_dev_missing(c, dev);
return ca;
}
static inline struct bch_dev *bch2_dev_tryget_noerror(struct bch_fs *c, unsigned dev)
{
rcu_read_lock();
struct bch_dev *ca = bch2_dev_rcu_noerror(c, dev);
if (ca)
bch2_dev_get(ca);
rcu_read_unlock();
return ca;
}
static inline struct bch_dev *bch2_dev_tryget(struct bch_fs *c, unsigned dev)
{
struct bch_dev *ca = bch2_dev_tryget_noerror(c, dev);
if (unlikely(!ca))
bch2_dev_missing(c, dev);
return ca;
}
static inline struct bch_dev *bch2_dev_bucket_tryget_noerror(struct bch_fs *c, struct bpos bucket)
{
struct bch_dev *ca = bch2_dev_tryget_noerror(c, bucket.inode);
if (ca && !bucket_valid(ca, bucket.offset)) {
bch2_dev_put(ca);
ca = NULL;
}
return ca;
}
void bch2_dev_bucket_missing(struct bch_fs *, struct bpos);
static inline struct bch_dev *bch2_dev_bucket_tryget(struct bch_fs *c, struct bpos bucket)
{
struct bch_dev *ca = bch2_dev_bucket_tryget_noerror(c, bucket);
if (!ca)
bch2_dev_bucket_missing(c, bucket);
return ca;
}
static inline struct bch_dev *bch2_dev_iterate_noerror(struct bch_fs *c, struct bch_dev *ca, unsigned dev_idx)
{
if (ca && ca->dev_idx == dev_idx)
return ca;
bch2_dev_put(ca);
return bch2_dev_tryget_noerror(c, dev_idx);
}
static inline struct bch_dev *bch2_dev_iterate(struct bch_fs *c, struct bch_dev *ca, unsigned dev_idx)
{
if (ca && ca->dev_idx == dev_idx)
return ca;
bch2_dev_put(ca);
return bch2_dev_tryget(c, dev_idx);
}
static inline struct bch_dev *bch2_dev_get_ioref(struct bch_fs *c, unsigned dev, int rw)
{
rcu_read_lock();
struct bch_dev *ca = bch2_dev_rcu(c, dev);
if (ca && !percpu_ref_tryget(&ca->io_ref))
ca = NULL;
rcu_read_unlock();
if (ca &&
(ca->mi.state == BCH_MEMBER_STATE_rw ||
(ca->mi.state == BCH_MEMBER_STATE_ro && rw == READ)))
return ca;
if (ca)
percpu_ref_put(&ca->io_ref);
return NULL;
}
/* 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_alive(struct bch_member *m)
{
return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
}
static inline bool bch2_member_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_alive(&m);
}
return false;
}
unsigned bch2_sb_nr_devices(const struct bch_sb *);
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),
.nbuckets_minus_first = le64_to_cpu(mi->nbuckets) -
le16_to_cpu(mi->first_bucket),
.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_alive(mi),
.btree_bitmap_shift = mi->btree_bitmap_shift,
.btree_allocated_bitmap = le64_to_cpu(mi->btree_allocated_bitmap),
};
}
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 *);
static inline bool bch2_dev_btree_bitmap_marked_sectors(struct bch_dev *ca, u64 start, unsigned sectors)
{
u64 end = start + sectors;
if (end > 64ULL << ca->mi.btree_bitmap_shift)
return false;
for (unsigned bit = start >> ca->mi.btree_bitmap_shift;
(u64) bit << ca->mi.btree_bitmap_shift < end;
bit++)
if (!(ca->mi.btree_allocated_bitmap & BIT_ULL(bit)))
return false;
return true;
}
bool bch2_dev_btree_bitmap_marked(struct bch_fs *, struct bkey_s_c);
void bch2_dev_btree_bitmap_mark(struct bch_fs *, struct bkey_s_c);
int bch2_sb_member_alloc(struct bch_fs *);
#endif /* _BCACHEFS_SB_MEMBERS_H */
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