84f1638795
Add a new superblock section that contains a list of
{ minor version, recovery passes, errors_to_fix }
that is - a list of recovery passes that must be run when downgrading
past a given version, and a list of errors to silently fix.
The upcoming disk accounting rewrite is not going to be fully
compatible: we're going to have to regenerate accounting both when
upgrading to the new version, and also from downgrading from the new
version, since the new method of doing disk space accounting is a
completely different architecture based on deltas, and synchronizing
them for every jounal entry write to maintain compatibility is going to
be too expensive and impractical.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/* 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);
|
|
|
|
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_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_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 */
|