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 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
13 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
14 enum bch_sb_field_type, unsigned);
15 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
17 #define field_to_type(_f, _name) \
18 container_of_or_null(_f, struct bch_sb_field_##_name, field)
20 #define x(_name, _nr) \
21 static inline struct bch_sb_field_##_name * \
22 bch2_sb_get_##_name(struct bch_sb *sb) \
24 return field_to_type(bch2_sb_field_get(sb, \
25 BCH_SB_FIELD_##_name), _name); \
28 static inline struct bch_sb_field_##_name * \
29 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
31 return field_to_type(bch2_sb_field_resize(sb, \
32 BCH_SB_FIELD_##_name, u64s), _name); \
38 extern const char * const bch2_sb_fields[];
40 struct bch_sb_field_ops {
41 const char * (*validate)(struct bch_sb *, struct bch_sb_field *);
42 void (*to_text)(struct printbuf *, struct bch_sb *,
43 struct bch_sb_field *);
46 static inline __le64 bch2_sb_magic(struct bch_fs *c)
49 memcpy(&ret, &c->sb.uuid, sizeof(ret));
53 static inline __u64 jset_magic(struct bch_fs *c)
55 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
58 static inline __u64 bset_magic(struct bch_fs *c)
60 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
63 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
64 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
66 void bch2_free_super(struct bch_sb_handle *);
67 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
69 const char *bch2_sb_validate(struct bch_sb_handle *);
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_journal: */
83 static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
86 ? (__le64 *) vstruct_end(&j->field) - j->buckets
90 /* BCH_SB_FIELD_members: */
92 static inline bool bch2_member_exists(struct bch_member *m)
94 return !bch2_is_zero(m->uuid.b, sizeof(uuid_le));
97 static inline bool bch2_dev_exists(struct bch_sb *sb,
98 struct bch_sb_field_members *mi,
101 return dev < sb->nr_devices &&
102 bch2_member_exists(&mi->members[dev]);
105 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
107 return (struct bch_member_cpu) {
108 .nbuckets = le64_to_cpu(mi->nbuckets),
109 .first_bucket = le16_to_cpu(mi->first_bucket),
110 .bucket_size = le16_to_cpu(mi->bucket_size),
111 .group = BCH_MEMBER_GROUP(mi),
112 .state = BCH_MEMBER_STATE(mi),
113 .replacement = BCH_MEMBER_REPLACEMENT(mi),
114 .discard = BCH_MEMBER_DISCARD(mi),
115 .data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
116 .durability = BCH_MEMBER_DURABILITY(mi)
117 ? BCH_MEMBER_DURABILITY(mi) - 1
119 .valid = !bch2_is_zero(mi->uuid.b, sizeof(uuid_le)),
123 /* BCH_SB_FIELD_clean: */
126 bch2_journal_super_entries_add_common(struct bch_fs *,
127 struct jset_entry *, u64);
129 void bch2_sb_clean_renumber(struct bch_sb_field_clean *, int);
131 int bch2_fs_mark_dirty(struct bch_fs *);
132 void bch2_fs_mark_clean(struct bch_fs *);
134 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
135 struct bch_sb_field *);
137 #endif /* _BCACHEFS_SUPER_IO_H */