git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/super-io.h

   1 #ifndef _BCACHEFS_SUPER_IO_H
   2 #define _BCACHEFS_SUPER_IO_H
   3
   4 #include "extents.h"
   5 #include "eytzinger.h"
   6 #include "super_types.h"
   7 #include "super.h"
   8
   9 #include <asm/byteorder.h>
  10
  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);
  14 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
  15
  16 #define field_to_type(_f, _name)                                        \
  17         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  18
  19 #define x(_name, _nr)                                                   \
  20 static inline struct bch_sb_field_##_name *                             \
  21 bch2_sb_get_##_name(struct bch_sb *sb)                                  \
  22 {                                                                       \
  23         return field_to_type(bch2_sb_field_get(sb,                      \
  24                                 BCH_SB_FIELD_##_name), _name);          \
  25 }                                                                       \
  26                                                                         \
  27 static inline struct bch_sb_field_##_name *                             \
  28 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
  29 {                                                                       \
  30         return field_to_type(bch2_sb_field_resize(sb,                   \
  31                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  32 }
  33
  34 BCH_SB_FIELDS()
  35 #undef x
  36
  37 extern const char * const bch2_sb_fields[];
  38
  39 struct bch_sb_field_ops {
  40         const char *    (*validate)(struct bch_sb *, struct bch_sb_field *);
  41         void            (*to_text)(struct printbuf *, struct bch_sb *,
  42                                    struct bch_sb_field *);
  43 };
  44
  45 static inline bool bch2_sb_test_feature(struct bch_sb *sb,
  46                                         enum bch_sb_features f)
  47 {
  48         unsigned w = f / 64;
  49         unsigned b = f % 64;
  50
  51         return le64_to_cpu(sb->features[w]) & (1ULL << b);
  52 }
  53
  54 static inline void bch2_sb_set_feature(struct bch_sb *sb,
  55                                        enum bch_sb_features f)
  56 {
  57         if (!bch2_sb_test_feature(sb, f)) {
  58                 unsigned w = f / 64;
  59                 unsigned b = f % 64;
  60
  61                 le64_add_cpu(&sb->features[w], 1ULL << b);
  62         }
  63 }
  64
  65 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  66 {
  67         __le64 ret;
  68         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  69         return ret;
  70 }
  71
  72 static inline __u64 jset_magic(struct bch_fs *c)
  73 {
  74         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  75 }
  76
  77 static inline __u64 bset_magic(struct bch_fs *c)
  78 {
  79         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  80 }
  81
  82 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  83 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  84
  85 void bch2_free_super(struct bch_sb_handle *);
  86 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  87
  88 const char *bch2_sb_validate(struct bch_sb_handle *);
  89
  90 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
  91 void bch2_write_super(struct bch_fs *);
  92
  93 /* BCH_SB_FIELD_journal: */
  94
  95 static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
  96 {
  97         return j
  98                 ? (__le64 *) vstruct_end(&j->field) - j->buckets
  99                 : 0;
 100 }
 101
 102 /* BCH_SB_FIELD_members: */
 103
 104 static inline bool bch2_member_exists(struct bch_member *m)
 105 {
 106         return !bch2_is_zero(m->uuid.b, sizeof(uuid_le));
 107 }
 108
 109 static inline bool bch2_dev_exists(struct bch_sb *sb,
 110                                    struct bch_sb_field_members *mi,
 111                                    unsigned dev)
 112 {
 113         return dev < sb->nr_devices &&
 114                 bch2_member_exists(&mi->members[dev]);
 115 }
 116
 117 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
 118 {
 119         return (struct bch_member_cpu) {
 120                 .nbuckets       = le64_to_cpu(mi->nbuckets),
 121                 .first_bucket   = le16_to_cpu(mi->first_bucket),
 122                 .bucket_size    = le16_to_cpu(mi->bucket_size),
 123                 .group          = BCH_MEMBER_GROUP(mi),
 124                 .state          = BCH_MEMBER_STATE(mi),
 125                 .replacement    = BCH_MEMBER_REPLACEMENT(mi),
 126                 .discard        = BCH_MEMBER_DISCARD(mi),
 127                 .data_allowed   = BCH_MEMBER_DATA_ALLOWED(mi),
 128                 .durability     = BCH_MEMBER_DURABILITY(mi)
 129                         ? BCH_MEMBER_DURABILITY(mi) - 1
 130                         : 1,
 131                 .valid          = !bch2_is_zero(mi->uuid.b, sizeof(uuid_le)),
 132         };
 133 }
 134
 135 /* BCH_SB_FIELD_clean: */
 136
 137 void bch2_fs_mark_clean(struct bch_fs *, bool);
 138
 139 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 140                            struct bch_sb_field *);
 141
 142 #endif /* _BCACHEFS_SUPER_IO_H */