nlm_do_lock
extern int nlm_do_lock(nlm4_lockargs *argp, nlm4_res *result,
if (nlm_do_lock(&args4, &res4, rqstp, TRUE, &rpc))
nlm_do_lock(argp, result, rqstp, TRUE, NULL);
if (nlm_do_lock(argp, &res4, rqstp, TRUE, &rpc))
nlm_do_lock(argp, result, rqstp, FALSE, NULL);