fs_iblkno         196 ufs/ffs/fs.h   	int32_t	 fs_iblkno;		/* offset of inode-blocks / frags */
fs_iblkno         468 ufs/ffs/fs.h   #define	cgimin(fs, c)	(cgstart(fs, c) + (fs)->fs_iblkno)	/* inode blk */