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 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
27 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
28 enum bch_sb_field_type, unsigned);
29 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
31 #define field_to_type(_f, _name) \
32 container_of_or_null(_f, struct bch_sb_field_##_name, field)
34 #define x(_name, _nr) \
35 static inline struct bch_sb_field_##_name * \
36 bch2_sb_get_##_name(struct bch_sb *sb) \
38 return field_to_type(bch2_sb_field_get(sb, \
39 BCH_SB_FIELD_##_name), _name); \
42 static inline struct bch_sb_field_##_name * \
43 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
45 return field_to_type(bch2_sb_field_resize(sb, \
46 BCH_SB_FIELD_##_name, u64s), _name); \
52 extern const char * const bch2_sb_fields[];
54 struct bch_sb_field_ops {
55 int (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
56 void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
59 static inline __le64 bch2_sb_magic(struct bch_fs *c)
63 memcpy(&ret, &c->sb.uuid, sizeof(ret));
67 static inline __u64 jset_magic(struct bch_fs *c)
69 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
72 static inline __u64 bset_magic(struct bch_fs *c)
74 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
77 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
78 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
80 void bch2_free_super(struct bch_sb_handle *);
81 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
83 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
84 int bch2_write_super(struct bch_fs *);
85 void __bch2_check_set_feature(struct bch_fs *, unsigned);
87 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
89 if (!(c->sb.features & (1ULL << feat)))
90 __bch2_check_set_feature(c, feat);
93 /* BCH_SB_FIELD_members_v1: */
95 static inline bool bch2_member_exists(struct bch_member *m)
97 return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
100 static inline bool bch2_dev_exists(struct bch_sb *sb,
103 if (dev < sb->nr_devices) {
104 struct bch_member m = bch2_sb_member_get(sb, dev);
105 return bch2_member_exists(&m);
110 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
112 return (struct bch_member_cpu) {
113 .nbuckets = le64_to_cpu(mi->nbuckets),
114 .first_bucket = le16_to_cpu(mi->first_bucket),
115 .bucket_size = le16_to_cpu(mi->bucket_size),
116 .group = BCH_MEMBER_GROUP(mi),
117 .state = BCH_MEMBER_STATE(mi),
118 .discard = BCH_MEMBER_DISCARD(mi),
119 .data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
120 .durability = BCH_MEMBER_DURABILITY(mi)
121 ? BCH_MEMBER_DURABILITY(mi) - 1
123 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
124 .valid = bch2_member_exists(mi),
128 void bch2_sb_maybe_downgrade(struct bch_fs *);
129 void bch2_sb_upgrade(struct bch_fs *, unsigned);
131 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
132 struct bch_sb_field *);
133 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
134 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
136 #endif /* _BCACHEFS_SUPER_IO_H */