--- /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