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

   1 #ifndef _BCACHE_SUPER_IO_H
   2 #define _BCACHE_SUPER_IO_H
   3
   4 #include "extents.h"
   5 #include "super_types.h"
   6
   7 #include <asm/byteorder.h>
   8
   9 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
  10 struct bch_sb_field *bch2_sb_field_resize(struct bcache_superblock *,
  11                                          enum bch_sb_field_type, unsigned);
  12 struct bch_sb_field *bch2_fs_sb_field_resize(struct bch_fs *,
  13                                          enum bch_sb_field_type, unsigned);
  14
  15 #define field_to_type(_f, _name)                                        \
  16         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  17
  18 #define BCH_SB_FIELD_TYPE(_name)                                        \
  19 static inline struct bch_sb_field_##_name *                             \
  20 bch2_sb_get_##_name(struct bch_sb *sb)                                  \
  21 {                                                                       \
  22         return field_to_type(bch2_sb_field_get(sb,                      \
  23                                 BCH_SB_FIELD_##_name), _name);          \
  24 }                                                                       \
  25                                                                         \
  26 static inline struct bch_sb_field_##_name *                             \
  27 bch2_sb_resize_##_name(struct bcache_superblock *sb, unsigned u64s)     \
  28 {                                                                       \
  29         return field_to_type(bch2_sb_field_resize(sb,                   \
  30                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  31 }                                                                       \
  32                                                                         \
  33 static inline struct bch_sb_field_##_name *                             \
  34 bch2_fs_sb_resize_##_name(struct bch_fs *c, unsigned u64s)              \
  35 {                                                                       \
  36         return field_to_type(bch2_fs_sb_field_resize(c,                 \
  37                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  38 }
  39
  40 BCH_SB_FIELD_TYPE(journal);
  41 BCH_SB_FIELD_TYPE(members);
  42 BCH_SB_FIELD_TYPE(crypt);
  43
  44 static inline bool bch2_sb_test_feature(struct bch_sb *sb,
  45                                         enum bch_sb_features f)
  46 {
  47         unsigned w = f / 64;
  48         unsigned b = f % 64;
  49
  50         return le64_to_cpu(sb->features[w]) & (1ULL << b);
  51 }
  52
  53 static inline void bch2_sb_set_feature(struct bch_sb *sb,
  54                                        enum bch_sb_features f)
  55 {
  56         if (!bch2_sb_test_feature(sb, f)) {
  57                 unsigned w = f / 64;
  58                 unsigned b = f % 64;
  59
  60                 le64_add_cpu(&sb->features[w], 1ULL << b);
  61         }
  62 }
  63
  64 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  65 {
  66         __le64 ret;
  67         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  68         return ret;
  69 }
  70
  71 static inline __u64 jset_magic(struct bch_fs *c)
  72 {
  73         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  74 }
  75
  76 static inline __u64 pset_magic(struct bch_fs *c)
  77 {
  78         return __le64_to_cpu(bch2_sb_magic(c) ^ PSET_MAGIC);
  79 }
  80
  81 static inline __u64 bset_magic(struct bch_fs *c)
  82 {
  83         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  84 }
  85
  86 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
  87 {
  88         return (struct bch_member_cpu) {
  89                 .nbuckets       = le64_to_cpu(mi->nbuckets),
  90                 .first_bucket   = le16_to_cpu(mi->first_bucket),
  91                 .bucket_size    = le16_to_cpu(mi->bucket_size),
  92                 .state          = BCH_MEMBER_STATE(mi),
  93                 .tier           = BCH_MEMBER_TIER(mi),
  94                 .has_metadata   = BCH_MEMBER_HAS_METADATA(mi),
  95                 .has_data       = BCH_MEMBER_HAS_DATA(mi),
  96                 .replacement    = BCH_MEMBER_REPLACEMENT(mi),
  97                 .discard        = BCH_MEMBER_DISCARD(mi),
  98                 .valid          = !bch2_is_zero(mi->uuid.b, sizeof(uuid_le)),
  99         };
 100 }
 101
 102 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
 103 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
 104
 105 void bch2_free_super(struct bcache_superblock *);
 106 int bch2_super_realloc(struct bcache_superblock *, unsigned);
 107
 108 const char *bch2_validate_journal_layout(struct bch_sb *,
 109                                          struct bch_member_cpu);
 110 const char *bch2_validate_cache_super(struct bcache_superblock *);
 111
 112 const char *bch2_read_super(struct bcache_superblock *,
 113                            struct bch_opts, const char *);
 114 void bch2_write_super(struct bch_fs *);
 115
 116 void bch2_check_mark_super_slowpath(struct bch_fs *,
 117                                     const struct bkey_i *, bool);
 118
 119 static inline bool bch2_check_super_marked(struct bch_fs *c,
 120                                            const struct bkey_i *k, bool meta)
 121 {
 122         struct bkey_s_c_extent e = bkey_i_to_s_c_extent(k);
 123         const struct bch_extent_ptr *ptr;
 124         unsigned nr_replicas = 0;
 125         bool ret = true;
 126
 127         extent_for_each_ptr(e, ptr) {
 128                 struct bch_dev *ca = c->devs[ptr->dev];
 129
 130                 if (ptr->cached)
 131                         continue;
 132
 133                 if (!(meta
 134                       ? ca->mi.has_metadata
 135                       : ca->mi.has_data)) {
 136                         ret = false;
 137                         break;
 138                 }
 139
 140                 nr_replicas++;
 141         }
 142
 143         if (nr_replicas <
 144             (meta ? c->sb.meta_replicas_have : c->sb.data_replicas_have))
 145                 ret = false;
 146
 147         return ret;
 148 }
 149
 150 static inline void bch2_check_mark_super(struct bch_fs *c,
 151                                          const struct bkey_i *k, bool meta)
 152 {
 153         if (bch2_check_super_marked(c, k, meta))
 154                 return;
 155
 156         bch2_check_mark_super_slowpath(c, k, meta);
 157 }
 158
 159 #endif /* _BCACHE_SUPER_IO_H */