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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);
static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f)
{
return le32_to_cpu(f->u64s) * sizeof(u64);
}
#define field_to_type(_f, _name) \
container_of_or_null(_f, struct bch_sb_field_##_name, field)
struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);
#define bch2_sb_field_get(_sb, _name) \
field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)
struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,
enum bch_sb_field_type, unsigned);
#define bch2_sb_field_resize(_sb, _name, _u64s) \
field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *,
enum bch_sb_field_type, unsigned);
#define bch2_sb_field_get_minsize(_sb, _name, _u64s) \
field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
#define bch2_sb_field_nr_entries(_f) \
(_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) / \
sizeof(_f->entries[0])) \
: 0)
void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
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_read_super_silent(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);
}
bool bch2_check_version_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_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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