MFLAG_INVERSE
inverse = (m->m_oflags & MFLAG_INVERSE) ? 1 : 0;
MFLAG_INVERSE | MFLAG_SET }
#define MOPT_NOATIME { "atime", MNT_NOATIME, MFLAG_INVERSE | MFLAG_SET }
#define MOPT_NODEV { "dev", MNT_NODEV, MFLAG_INVERSE | MFLAG_SET }
#define MOPT_NOEXEC { "exec", MNT_NOEXEC, MFLAG_INVERSE | MFLAG_SET }
#define MOPT_NOSUID { "suid", MNT_NOSUID, MFLAG_INVERSE | MFLAG_SET }
#define MOPT_NOPERM { "perm", MNT_NOPERM, MFLAG_INVERSE | MFLAG_SET }
#define MOPT_RW { "rw", MNT_RDONLY, MFLAG_INVERSE | MFLAG_SET }
{ "ac", ALTF_NOAC, MFLAG_INVERSE },
{ "conn", ALTF_NOCONN, MFLAG_INVERSE },