CIFSSEC_MUST_SIGN
unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL);
if (global_secflags & CIFSSEC_MUST_SIGN) {
mnt_sign_required = ((global_secflags & CIFSSEC_MUST_SIGN) ==
CIFSSEC_MUST_SIGN);