1 #ifndef _BCACHEFS_SUPER_IO_H
2 #define _BCACHEFS_SUPER_IO_H
6 #include "super_types.h"
9 #include <asm/byteorder.h>
11 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
12 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
13 enum bch_sb_field_type, unsigned);
15 #define field_to_type(_f, _name) \
16 container_of_or_null(_f, struct bch_sb_field_##_name, field)
18 #define x(_name, _nr) \
19 static inline struct bch_sb_field_##_name * \
20 bch2_sb_get_##_name(struct bch_sb *sb) \
22 return field_to_type(bch2_sb_field_get(sb, \
23 BCH_SB_FIELD_##_name), _name); \
26 static inline struct bch_sb_field_##_name * \
27 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
29 return field_to_type(bch2_sb_field_resize(sb, \
30 BCH_SB_FIELD_##_name, u64s), _name); \
36 extern const char * const bch2_sb_fields[];
38 struct bch_sb_field_ops {
39 const char * (*validate)(struct bch_sb *, struct bch_sb_field *);
40 void (*to_text)(struct printbuf *, struct bch_sb *,
41 struct bch_sb_field *);
44 static inline bool bch2_sb_test_feature(struct bch_sb *sb,
45 enum bch_sb_features f)
50 return le64_to_cpu(sb->features[w]) & (1ULL << b);
53 static inline void bch2_sb_set_feature(struct bch_sb *sb,
54 enum bch_sb_features f)
56 if (!bch2_sb_test_feature(sb, f)) {
60 le64_add_cpu(&sb->features[w], 1ULL << b);
64 static inline __le64 bch2_sb_magic(struct bch_fs *c)
67 memcpy(&ret, &c->sb.uuid, sizeof(ret));
71 static inline __u64 jset_magic(struct bch_fs *c)
73 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
76 static inline __u64 bset_magic(struct bch_fs *c)
78 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
81 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
82 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
84 void bch2_free_super(struct bch_sb_handle *);
85 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
87 const char *bch2_sb_validate(struct bch_sb_handle *);
89 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
90 void bch2_write_super(struct bch_fs *);
92 /* BCH_SB_FIELD_journal: */
94 static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
97 ? (__le64 *) vstruct_end(&j->field) - j->buckets
101 /* BCH_SB_FIELD_members: */
103 static inline bool bch2_member_exists(struct bch_member *m)
105 return !bch2_is_zero(m->uuid.b, sizeof(uuid_le));
108 static inline bool bch2_dev_exists(struct bch_sb *sb,
109 struct bch_sb_field_members *mi,
112 return dev < sb->nr_devices &&
113 bch2_member_exists(&mi->members[dev]);
116 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
118 return (struct bch_member_cpu) {
119 .nbuckets = le64_to_cpu(mi->nbuckets),
120 .first_bucket = le16_to_cpu(mi->first_bucket),
121 .bucket_size = le16_to_cpu(mi->bucket_size),
122 .group = BCH_MEMBER_GROUP(mi),
123 .state = BCH_MEMBER_STATE(mi),
124 .replacement = BCH_MEMBER_REPLACEMENT(mi),
125 .discard = BCH_MEMBER_DISCARD(mi),
126 .data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
127 .durability = BCH_MEMBER_DURABILITY(mi)
128 ? BCH_MEMBER_DURABILITY(mi) - 1
130 .valid = !bch2_is_zero(mi->uuid.b, sizeof(uuid_le)),
134 /* BCH_SB_FIELD_clean: */
136 void bch2_fs_mark_clean(struct bch_fs *, bool);
138 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
139 struct bch_sb_field *);
141 #endif /* _BCACHEFS_SUPER_IO_H */