1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_SUPER_IO_H
3 #define _BCACHEFS_SUPER_IO_H
7 #include "super_types.h"
10 #include <asm/byteorder.h>
12 static inline bool bch2_version_compatible(u16 version)
14 return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
15 version >= bcachefs_metadata_version_min;
18 void bch2_version_to_text(struct printbuf *, unsigned);
19 unsigned bch2_latest_compatible_version(unsigned);
21 u64 bch2_upgrade_recovery_passes(struct bch_fs *c,
25 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
26 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
27 enum bch_sb_field_type, unsigned);
28 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
30 #define field_to_type(_f, _name) \
31 container_of_or_null(_f, struct bch_sb_field_##_name, field)
33 #define x(_name, _nr) \
34 static inline struct bch_sb_field_##_name * \
35 bch2_sb_get_##_name(struct bch_sb *sb) \
37 return field_to_type(bch2_sb_field_get(sb, \
38 BCH_SB_FIELD_##_name), _name); \
41 static inline struct bch_sb_field_##_name * \
42 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
44 return field_to_type(bch2_sb_field_resize(sb, \
45 BCH_SB_FIELD_##_name, u64s), _name); \
51 extern const char * const bch2_sb_fields[];
53 struct bch_sb_field_ops {
54 int (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
55 void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
58 static inline __le64 bch2_sb_magic(struct bch_fs *c)
62 memcpy(&ret, &c->sb.uuid, sizeof(ret));
66 static inline __u64 jset_magic(struct bch_fs *c)
68 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
71 static inline __u64 bset_magic(struct bch_fs *c)
73 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
76 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
77 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
79 void bch2_free_super(struct bch_sb_handle *);
80 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
82 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
83 int bch2_write_super(struct bch_fs *);
84 void __bch2_check_set_feature(struct bch_fs *, unsigned);
86 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
88 if (!(c->sb.features & (1ULL << feat)))
89 __bch2_check_set_feature(c, feat);
92 /* BCH_SB_FIELD_members: */
94 static inline bool bch2_member_exists(struct bch_member *m)
96 return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
99 static inline bool bch2_dev_exists(struct bch_sb *sb,
100 struct bch_sb_field_members *mi,
103 return dev < sb->nr_devices &&
104 bch2_member_exists(&mi->members[dev]);
107 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
109 return (struct bch_member_cpu) {
110 .nbuckets = le64_to_cpu(mi->nbuckets),
111 .first_bucket = le16_to_cpu(mi->first_bucket),
112 .bucket_size = le16_to_cpu(mi->bucket_size),
113 .group = BCH_MEMBER_GROUP(mi),
114 .state = BCH_MEMBER_STATE(mi),
115 .discard = BCH_MEMBER_DISCARD(mi),
116 .data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
117 .durability = BCH_MEMBER_DURABILITY(mi)
118 ? BCH_MEMBER_DURABILITY(mi) - 1
120 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
121 .valid = bch2_member_exists(mi),
125 void bch2_sb_maybe_downgrade(struct bch_fs *);
126 void bch2_sb_upgrade(struct bch_fs *, unsigned);
128 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
129 struct bch_sb_field *);
130 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
131 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
133 #endif /* _BCACHEFS_SUPER_IO_H */