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 cache_sb {
   9         uint8_t         magic[16];
  10 #define CACHE_CLEAN             1
  11 #define CACHE_SYNC              2
  12 #define CACHE_BACKING_DEVICE    4
  13         uint32_t        version;
  14         uint16_t        block_size;     /* sectors */
  15         uint16_t        bucket_size;    /* sectors */
  16         uint32_t        journal_start;  /* buckets */
  17         uint32_t        first_bucket;   /* start of data */
  18         uint64_t        nbuckets;       /* device size */
  19         uint64_t        btree_root;
  20         uint16_t        btree_level;
  21         uint16_t        nr_in_set;
  22         uint16_t        nr_this_dev;
  23         uint16_t        _pad[1];
  24         uint8_t         uuid[16];
  25         uint8_t         set_uuid[16];
  26 };
  27
  28 struct bucket_disk {
  29         uint16_t        priority;
  30         uint8_t         generation;
  31 } __attribute((packed));
  32
  33 #endif