fstype/xfs_sb.h

   1 #ifndef __XFS_SB_H
   2 #define __XFS_SB_H
   3
   4 /*
   5  * Super block
   6  * Fits into a sector-sized buffer at address 0 of each allocation group.
   7  * Only the first of these is ever updated except during growfs.
   8  */
   9
  10 struct xfs_buf;
  11 struct xfs_mount;
  12
  13 #define XFS_SB_MAGIC            0x58465342      /* 'XFSB' */
  14
  15 typedef struct xfs_sb {
  16         __u32 sb_magicnum;      /* magic number == XFS_SB_MAGIC */
  17         __u32 sb_blocksize;     /* logical block size, bytes */
  18         __u64 sb_dblocks;       /* number of data blocks */
  19 } xfs_sb_t;
  20
  21 #endif /* __XFS_SB_H */