osd_jail_call
error = osd_jail_call(pr, PR_METHOD_CHECK, opts);
error = osd_jail_call(pr, PR_METHOD_CREATE, opts);
error = osd_jail_call(pr, PR_METHOD_SET, opts);
error = osd_jail_call(pr, PR_METHOD_GET, opts);
error = osd_jail_call(pr, PR_METHOD_ATTACH, td);
(void)osd_jail_call(td->td_ucred->cr_prison, PR_METHOD_ATTACH, td);
(void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL);