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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BCACHEFS_SUPER_IO_H3#define _BCACHEFS_SUPER_IO_H4 5#include "extents.h"6#include "eytzinger.h"7#include "super_types.h"8#include "super.h"9#include "sb-members.h"10 11#include <asm/byteorder.h>12 13static inline bool bch2_version_compatible(u16 version)14{15 return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&16 version >= bcachefs_metadata_version_min;17}18 19void bch2_version_to_text(struct printbuf *, unsigned);20unsigned bch2_latest_compatible_version(unsigned);21 22static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f)23{24 return le32_to_cpu(f->u64s) * sizeof(u64);25}26 27#define field_to_type(_f, _name) \28 container_of_or_null(_f, struct bch_sb_field_##_name, field)29 30struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);31#define bch2_sb_field_get(_sb, _name) \32 field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)33 34struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,35 enum bch_sb_field_type, unsigned);36#define bch2_sb_field_resize(_sb, _name, _u64s) \37 field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)38 39struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *,40 enum bch_sb_field_type, unsigned);41#define bch2_sb_field_get_minsize(_sb, _name, _u64s) \42 field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)43 44#define bch2_sb_field_nr_entries(_f) \45 (_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) / \46 sizeof(_f->entries[0])) \47 : 0)48 49void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);50 51extern const char * const bch2_sb_fields[];52 53struct bch_sb_field_ops {54 int (*validate)(struct bch_sb *, struct bch_sb_field *,55 enum bch_validate_flags, struct printbuf *);56 void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);57};58 59static inline __le64 bch2_sb_magic(struct bch_fs *c)60{61 __le64 ret;62 63 memcpy(&ret, &c->sb.uuid, sizeof(ret));64 return ret;65}66 67static inline __u64 jset_magic(struct bch_fs *c)68{69 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);70}71 72static inline __u64 bset_magic(struct bch_fs *c)73{74 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);75}76 77int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);78int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);79 80void bch2_free_super(struct bch_sb_handle *);81int bch2_sb_realloc(struct bch_sb_handle *, unsigned);82 83int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);84int bch2_read_super_silent(const char *, struct bch_opts *, struct bch_sb_handle *);85int bch2_write_super(struct bch_fs *);86void __bch2_check_set_feature(struct bch_fs *, unsigned);87 88static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)89{90 if (!(c->sb.features & (1ULL << feat)))91 __bch2_check_set_feature(c, feat);92}93 94bool bch2_check_version_downgrade(struct bch_fs *);95void bch2_sb_upgrade(struct bch_fs *, unsigned);96 97void __bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,98 struct bch_sb_field *);99void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,100 struct bch_sb_field *);101void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);102void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);103 104#endif /* _BCACHEFS_SUPER_IO_H */105