extlinux/btrfs.h

   1 #ifndef _BTRFS_H_
   2 #define _BTRFS_H_
   3
   4 #define BTRFS_SUPER_MAGIC 0x9123683E
   5 #define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
   6 #define BTRFS_SUPER_INFO_SIZE 4096
   7 #define BTRFS_MAGIC "_BHRfS_M"
   8 #define BTRFS_CSUM_SIZE 32
   9 #define BTRFS_FSID_SIZE 16
  10
  11 struct btrfs_super_block {
  12         unsigned char csum[BTRFS_CSUM_SIZE];
  13         /* the first 3 fields must match struct btrfs_header */
  14         unsigned char fsid[BTRFS_FSID_SIZE];    /* FS specific uuid */
  15         u64 bytenr; /* this block number */
  16         u64 flags;
  17
  18         /* allowed to be different from the btrfs_header from here own down */
  19         u64 magic;
  20 } __attribute__ ((__packed__));
  21
  22 #endif