1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_SUPER_IO_H
3 #define _BCACHEFS_SUPER_IO_H
7 #include "super_types.h"
9 #include "sb-members.h"
11 #include <asm/byteorder.h>
13 static inline bool bch2_version_compatible(u16 version)
15 return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
16 version >= bcachefs_metadata_version_min;
19 void bch2_version_to_text(struct printbuf *, unsigned);
20 unsigned bch2_latest_compatible_version(unsigned);
22 u64 bch2_upgrade_recovery_passes(struct bch_fs *c,
26 #define field_to_type(_f, _name) \
27 container_of_or_null(_f, struct bch_sb_field_##_name, field)
29 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);
30 #define bch2_sb_field_get(_sb, _name) \
31 field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)
33 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,
34 enum bch_sb_field_type, unsigned);
35 #define bch2_sb_field_resize(_sb, _name, _u64s) \
36 field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
38 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
40 extern const char * const bch2_sb_fields[];
42 struct bch_sb_field_ops {
43 int (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
44 void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
47 static inline __le64 bch2_sb_magic(struct bch_fs *c)
51 memcpy(&ret, &c->sb.uuid, sizeof(ret));
55 static inline __u64 jset_magic(struct bch_fs *c)
57 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
60 static inline __u64 bset_magic(struct bch_fs *c)
62 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
65 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
66 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
68 void bch2_free_super(struct bch_sb_handle *);
69 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
71 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
72 int bch2_write_super(struct bch_fs *);
73 void __bch2_check_set_feature(struct bch_fs *, unsigned);
75 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
77 if (!(c->sb.features & (1ULL << feat)))
78 __bch2_check_set_feature(c, feat);
81 /* BCH_SB_FIELD_members_v1: */
83 static inline bool bch2_member_exists(struct bch_member *m)
85 return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
88 static inline bool bch2_dev_exists(struct bch_sb *sb,
91 if (dev < sb->nr_devices) {
92 struct bch_member m = bch2_sb_member_get(sb, dev);
93 return bch2_member_exists(&m);
98 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
100 return (struct bch_member_cpu) {
101 .nbuckets = le64_to_cpu(mi->nbuckets),
102 .first_bucket = le16_to_cpu(mi->first_bucket),
103 .bucket_size = le16_to_cpu(mi->bucket_size),
104 .group = BCH_MEMBER_GROUP(mi),
105 .state = BCH_MEMBER_STATE(mi),
106 .discard = BCH_MEMBER_DISCARD(mi),
107 .data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
108 .durability = BCH_MEMBER_DURABILITY(mi)
109 ? BCH_MEMBER_DURABILITY(mi) - 1
111 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
112 .valid = bch2_member_exists(mi),
116 void bch2_sb_maybe_downgrade(struct bch_fs *);
117 void bch2_sb_upgrade(struct bch_fs *, unsigned);
119 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
120 struct bch_sb_field *);
121 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
122 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
124 #endif /* _BCACHEFS_SUPER_IO_H */