git.sesse.net Git - bcachefs-tools-debian/blob - bcache.h

   1 #ifndef _BCACHE_H
   2 #define _BCACHE_H
   3
   4 static const char bcache_magic[] = {
   5         0xc6, 0x85, 0x73, 0xf6, 0x4e, 0x1a, 0x45, 0xca,
   6         0x82, 0x65, 0xf5, 0x7f, 0x48, 0xba, 0x6d, 0x81 };
   7
   8 struct bkey {
   9         uint64_t        header;
  10         uint64_t        key;
  11         uint64_t        ptr[];
  12 };
  13
  14 struct cache_sb {
  15         uint8_t         magic[16];
  16         uint8_t         uuid[16];
  17         uint8_t         set_uuid[16];
  18         uint64_t        sequence;
  19
  20 #define CACHE_CLEAN             1
  21 #define CACHE_SYNC              2
  22 #define CACHE_BACKING_DEV       4
  23         uint32_t        version;
  24         uint16_t        block_size;     /* sectors */
  25         uint16_t        bucket_size;    /* sectors */
  26         uint32_t        journal_start;  /* buckets */
  27         uint32_t        first_bucket;   /* start of data */
  28         uint64_t        nbuckets;       /* device size */
  29
  30         union {
  31                 struct bkey     btree_root;
  32                 uint64_t        _pad[8];
  33         };
  34         uint16_t        btree_level;
  35         uint16_t        nr_in_set;
  36         uint16_t        nr_this_dev;
  37         uint16_t        _pad[1];
  38 };
  39
  40 struct bucket_disk {
  41         uint16_t        priority;
  42         uint8_t         generation;
  43 } __attribute((packed));
  44
  45 #endif