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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SUPER_IO_H
#define _BCACHEFS_SUPER_IO_H
#include "extents.h"
#include "eytzinger.h"
#include "super_types.h"
#include "super.h"
#include "sb-members.h"
#include <asm/byteorder.h>
static inline bool bch2_version_compatible(u16 version)
{
return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
version >= bcachefs_metadata_version_min;
}
void bch2_version_to_text(struct printbuf *, unsigned);
unsigned bch2_latest_compatible_version(unsigned);
u64 bch2_upgrade_recovery_passes(struct bch_fs *c,
unsigned,
unsigned);
struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
enum bch_sb_field_type, unsigned);
void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
#define field_to_type(_f, _name) \
container_of_or_null(_f, struct bch_sb_field_##_name, field)
#define x(_name, _nr) \
static inline struct bch_sb_field_##_name * \
bch2_sb_get_##_name(struct bch_sb *sb) \
{ \
return field_to_type(bch2_sb_field_get(sb, \
BCH_SB_FIELD_##_name), _name); \
} \
\
static inline struct bch_sb_field_##_name * \
bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
{ \
return field_to_type(bch2_sb_field_resize(sb, \
BCH_SB_FIELD_##_name, u64s), _name); \
}
BCH_SB_FIELDS()
#undef x
extern const char * const bch2_sb_fields[];
struct bch_sb_field_ops {
int (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
};
static inline __le64 bch2_sb_magic(struct bch_fs *c)
{
__le64 ret;
memcpy(&ret, &c->sb.uuid, sizeof(ret));
return ret;
}
static inline __u64 jset_magic(struct bch_fs *c)
{
return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
}
static inline __u64 bset_magic(struct bch_fs *c)
{
return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
}
int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
void bch2_free_super(struct bch_sb_handle *);
int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
int bch2_write_super(struct bch_fs *);
void __bch2_check_set_feature(struct bch_fs *, unsigned);
static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
{
if (!(c->sb.features & (1ULL << feat)))
__bch2_check_set_feature(c, feat);
}
/* BCH_SB_FIELD_members: */
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_maybe_downgrade(struct bch_fs *);
void bch2_sb_upgrade(struct bch_fs *, unsigned);
void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
struct bch_sb_field *);
void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
#endif /* _BCACHEFS_SUPER_IO_H */
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