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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_DISK_GROUPS_H
#define _BCACHEFS_DISK_GROUPS_H
extern const struct bch_sb_field_ops bch_sb_field_ops_disk_groups;
static inline unsigned disk_groups_nr(struct bch_sb_field_disk_groups *groups)
{
return groups
? (vstruct_end(&groups->field) -
(void *) &groups->entries[0]) / sizeof(struct bch_disk_group)
: 0;
}
struct target {
enum {
TARGET_NULL,
TARGET_DEV,
TARGET_GROUP,
} type;
union {
unsigned dev;
unsigned group;
};
};
#define TARGET_DEV_START 1
#define TARGET_GROUP_START (256 + TARGET_DEV_START)
static inline u16 dev_to_target(unsigned dev)
{
return TARGET_DEV_START + dev;
}
static inline u16 group_to_target(unsigned group)
{
return TARGET_GROUP_START + group;
}
static inline struct target target_decode(unsigned target)
{
if (target >= TARGET_GROUP_START)
return (struct target) {
.type = TARGET_GROUP,
.group = target - TARGET_GROUP_START
};
if (target >= TARGET_DEV_START)
return (struct target) {
.type = TARGET_DEV,
.group = target - TARGET_DEV_START
};
return (struct target) { .type = TARGET_NULL };
}
const struct bch_devs_mask *bch2_target_to_mask(struct bch_fs *, unsigned);
static inline struct bch_devs_mask target_rw_devs(struct bch_fs *c,
enum bch_data_type data_type,
u16 target)
{
struct bch_devs_mask devs = c->rw_devs[data_type];
const struct bch_devs_mask *t = bch2_target_to_mask(c, target);
if (t)
bitmap_and(devs.d, devs.d, t->d, BCH_SB_MEMBERS_MAX);
return devs;
}
bool bch2_dev_in_target(struct bch_fs *, unsigned, unsigned);
int bch2_disk_path_find(struct bch_sb_handle *, const char *);
/* Exported for userspace bcachefs-tools: */
int bch2_disk_path_find_or_create(struct bch_sb_handle *, const char *);
void bch2_disk_path_to_text(struct printbuf *, struct bch_sb *, unsigned);
int bch2_opt_target_parse(struct bch_fs *, const char *, u64 *);
void bch2_opt_target_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
int bch2_sb_disk_groups_to_cpu(struct bch_fs *);
int bch2_dev_group_set(struct bch_fs *, struct bch_dev *, const char *);
const char *bch2_sb_validate_disk_groups(struct bch_sb *,
struct bch_sb_field *);
#endif /* _BCACHEFS_DISK_GROUPS_H */
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