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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_SUPER_IO_H
   3 #define _BCACHEFS_SUPER_IO_H
   4
   5 #include "extents.h"
   6 #include "eytzinger.h"
   7 #include "super_types.h"
   8 #include "super.h"
   9
  10 #include <asm/byteorder.h>
  11
  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);
  16
  17 #define field_to_type(_f, _name)                                        \
  18         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  19
  20 #define x(_name, _nr)                                                   \
  21 static inline struct bch_sb_field_##_name *                             \
  22 bch2_sb_get_##_name(struct bch_sb *sb)                                  \
  23 {                                                                       \
  24         return field_to_type(bch2_sb_field_get(sb,                      \
  25                                 BCH_SB_FIELD_##_name), _name);          \
  26 }                                                                       \
  27                                                                         \
  28 static inline struct bch_sb_field_##_name *                             \
  29 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
  30 {                                                                       \
  31         return field_to_type(bch2_sb_field_resize(sb,                   \
  32                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  33 }
  34
  35 BCH_SB_FIELDS()
  36 #undef x
  37
  38 extern const char * const bch2_sb_fields[];
  39
  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 *);
  44 };
  45
  46 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  47 {
  48         __le64 ret;
  49         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  50         return ret;
  51 }
  52
  53 static inline __u64 jset_magic(struct bch_fs *c)
  54 {
  55         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  56 }
  57
  58 static inline __u64 bset_magic(struct bch_fs *c)
  59 {
  60         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  61 }
  62
  63 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  64 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  65
  66 void bch2_free_super(struct bch_sb_handle *);
  67 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  68
  69 const char *bch2_sb_validate(struct bch_sb_handle *);
  70
  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);
  74
  75 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
  76 {
  77         if (!(c->sb.features & (1ULL << feat)))
  78                 __bch2_check_set_feature(c, feat);
  79 }
  80
  81 /* BCH_SB_FIELD_journal: */
  82
  83 static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
  84 {
  85         return j
  86                 ? (__le64 *) vstruct_end(&j->field) - j->buckets
  87                 : 0;
  88 }
  89
  90 /* BCH_SB_FIELD_members: */
  91
  92 static inline bool bch2_member_exists(struct bch_member *m)
  93 {
  94         return !bch2_is_zero(m->uuid.b, sizeof(uuid_le));
  95 }
  96
  97 static inline bool bch2_dev_exists(struct bch_sb *sb,
  98                                    struct bch_sb_field_members *mi,
  99                                    unsigned dev)
 100 {
 101         return dev < sb->nr_devices &&
 102                 bch2_member_exists(&mi->members[dev]);
 103 }
 104
 105 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
 106 {
 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
 118                         : 1,
 119                 .valid          = !bch2_is_zero(mi->uuid.b, sizeof(uuid_le)),
 120         };
 121 }
 122
 123 /* BCH_SB_FIELD_clean: */
 124
 125 struct jset_entry *
 126 bch2_journal_super_entries_add_common(struct bch_fs *,
 127                                       struct jset_entry *, u64);
 128
 129 void bch2_sb_clean_renumber(struct bch_sb_field_clean *, int);
 130
 131 int bch2_fs_mark_dirty(struct bch_fs *);
 132 void bch2_fs_mark_clean(struct bch_fs *);
 133
 134 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 135                            struct bch_sb_field *);
 136
 137 #endif /* _BCACHEFS_SUPER_IO_H */