/*
* Purpose: Test whether a specified lock would be granted if requested
* Returns: nlm_granted (or error code)
* Notes:
*/
nlm_testres *
nlm_test_1_svc(nlm_testargs *arg, struct svc_req *rqstp)
{
static nlm_testres result;
struct nlm4_lock arg4;
struct nlm4_holder *holder;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_test", rqstp);
holder = testlock(&arg4, 0);
/*
* Copy the cookie from the argument into the result. Note that this
* is slightly hazardous, as the structure contains a pointer to a
* malloc()ed buffer that will get freed by the caller. However, the
* main function transmits the result before freeing the argument
* so it is in fact safe.
*/
result.cookie = arg->cookie;
if (holder == NULL) {
result.stat.stat = nlm_granted;
} else {
result.stat.stat = nlm_denied;
memcpy(&result.stat.nlm_testrply_u.holder, holder,
sizeof(struct nlm_holder));
result.stat.nlm_testrply_u.holder.l_offset =
(unsigned int)holder->l_offset;
result.stat.nlm_testrply_u.holder.l_len =
(unsigned int)holder->l_len;
}
return &result;
}
void *
nlm_test_msg_1_svc(nlm_testargs *arg, struct svc_req *rqstp)
{
nlm_testres result;
static char dummy;
struct sockaddr_in *addr;
CLIENT *cli;
int success;
struct timeval timeo;
struct nlm4_lock arg4;
struct nlm4_holder *holder;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_test_msg", rqstp);
holder = testlock(&arg4, 0);
result.cookie = arg->cookie;
if (holder == NULL) {
result.stat.stat = nlm_granted;
} else {
result.stat.stat = nlm_denied;
memcpy(&result.stat.nlm_testrply_u.holder, holder,
sizeof(struct nlm_holder));
result.stat.nlm_testrply_u.holder.l_offset =
(unsigned int)holder->l_offset;
result.stat.nlm_testrply_u.holder.l_len =
(unsigned int)holder->l_len;
}
/*
* nlm_test has different result type to the other operations, so
* can't use transmit_result() in this case
*/
addr = svc_getcaller(rqstp->rq_xprt);
if ((cli = get_client(addr, NLM_VERS)) != NULL) {
/* No timeout - not expecting response */
timerclear(&timeo);
success = clnt_call(cli, NLM_TEST_RES, xdr_nlm_testres,
&result, xdr_void, &dummy, timeo);
if (debug_level > 2)
syslog(LOG_DEBUG, "clnt_call returns %d", success);
}
return NULL;
}
/*
* Purpose: Release an existing lock
* Returns: Always granted, unless during grace period
* Notes: "no such lock" error condition is ignored, as the
* protocol uses unreliable UDP datagrams, and may well
* re-try an unlock that has already succeeded.
*/
nlm_res *
nlm_unlock_1_svc(nlm_unlockargs *arg, struct svc_req *rqstp)
{
static nlm_res result;
struct nlm4_lock arg4;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_unlock", rqstp);
result.stat.stat = unlock(&arg4, 0);
result.cookie = arg->cookie;
return &result;
}
void *
nlm_unlock_msg_1_svc(nlm_unlockargs *arg, struct svc_req *rqstp)
{
static nlm_res result;
struct nlm4_lock arg4;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_unlock_msg", rqstp);
result.stat.stat = unlock(&arg4, 0);
result.cookie = arg->cookie;
transmit_result(NLM_UNLOCK_RES, &result, svc_getcaller(rqstp->rq_xprt));
return NULL;
}
void *
nlm_unlock_msg_1_svc(nlm_unlockargs *arg, struct svc_req *rqstp)
{
static nlm_res res;
struct nlm4_lock arg4;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_unlock_msg", rqstp);
res.stat.stat = unlock(&arg4, 0);
res.cookie = arg->cookie;
transmit_result(NLM_UNLOCK_RES, &res, getrpcaddr(rqstp));
return (NULL);
}
void *
nlm_cancel_msg_1_svc(nlm_cancargs *arg, struct svc_req *rqstp)
{
static nlm_res result;
struct nlm4_lock arg4;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_cancel_msg", rqstp);
result.cookie = arg->cookie;
/*
* Since at present we never return 'nlm_blocked', there can never be
* a lock to cancel, so this call always fails.
*/
result.stat.stat = unlock(&arg4, LOCK_CANCEL);
transmit_result(NLM_CANCEL_RES, &result, svc_getcaller(rqstp->rq_xprt));
return NULL;
}
/*
* Purpose: Cancel a blocked lock request
* Returns: granted or denied
* Notes:
*/
nlm_res *
nlm_cancel_1_svc(nlm_cancargs *arg, struct svc_req *rqstp)
{
static nlm_res result;
struct nlm4_lock arg4;
nlmtonlm4(&arg->alock, &arg4);
if (debug_level)
log_from_addr("nlm_cancel", rqstp);
/* copy cookie from arg to result. See comment in nlm_test_1() */
result.cookie = arg->cookie;
/*
* Since at present we never return 'nlm_blocked', there can never be
* a lock to cancel, so this call always fails.
*/
result.stat.stat = unlock(&arg4, LOCK_CANCEL);
return &result;
}
/*
* Purposes: Establish a lock
* Returns: granted, denied or blocked
* Notes: *** grace period support missing
*/
nlm_res *
nlm_lock_1_svc(nlm_lockargs *arg, struct svc_req *rqstp)
{
static nlm_res result;
struct nlm4_lockargs arg4;
nlmtonlm4(&arg->alock, &arg4.alock);
arg4.cookie = arg->cookie;
arg4.block = arg->block;
arg4.exclusive = arg->exclusive;
arg4.reclaim = arg->reclaim;
arg4.state = arg->state;
if (debug_level)
log_from_addr("nlm_lock", rqstp);
/* copy cookie from arg to result. See comment in nlm_test_1() */
result.cookie = arg->cookie;
result.stat.stat = getlock(&arg4, rqstp, LOCK_MON);
return &result;
}
void *
nlm_lock_msg_1_svc(nlm_lockargs *arg, struct svc_req *rqstp)
{
static nlm_res result;
struct nlm4_lockargs arg4;
nlmtonlm4(&arg->alock, &arg4.alock);
arg4.cookie = arg->cookie;
arg4.block = arg->block;
arg4.exclusive = arg->exclusive;
arg4.reclaim = arg->reclaim;
arg4.state = arg->state;
if (debug_level)
log_from_addr("nlm_lock_msg", rqstp);
result.cookie = arg->cookie;
result.stat.stat = getlock(&arg4, rqstp, LOCK_ASYNC | LOCK_MON);
transmit_result(NLM_LOCK_RES, &result, svc_getcaller(rqstp->rq_xprt));
return NULL;
}
