+++ /dev/null
-/* 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 */
projects / bcachefs-tools-debian / blobdiff