sblock
#define sblock sb.ie_fs
#define sblock sb.iu_fs
#define sblock ufs.fs
#define sblock (*sblk.b_un.b_fs)
#define sblock fsun1.fs /* the new superblock */
#define sblock fsun->fs
#define sblock ext2fsun.m_ext2fs
#define sblock sb_un.sblk
#define sblock sbun.sb
sblock(struct sockbuf *sb, int flags)
#define sblock fsun.fs