/* | |
* Super block | |
* Fits into a sector-sized buffer at address 0 of each allocation group. | |
* Only the first of these is ever updated except during growfs. | |
*/ | |
struct xfs_buf; | |
struct xfs_mount; | |
#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */ | |
typedef struct xfs_sb | |
{ | |
__u32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ | |
__u32 sb_blocksize; /* logical block size, bytes */ | |
__u64 sb_dblocks; /* number of data blocks */ | |
} xfs_sb_t; |