MD_VERIFY
mdio.md_options |= MD_VERIFY;
mdio.md_options &= ~MD_VERIFY;
if (mdiox.md_options & MD_VERIFY) {
sc->flags &= ~MD_VERIFY;
if (g_handleattr_int(bp, "MNT::verified", (sc->flags & MD_VERIFY) != 0))
| ((mdr->md_options & MD_VERIFY) ? O_VERIFY : 0);
MD_VERIFY | MD_MUSTDEALLOC);
if ((mdr->md_options & MD_VERIFY) != 0)