/* ARGSUSED */
void
ip_dce_reclaim(void *args)
{
netstack_handle_t nh;
netstack_t *ns;
netstack_next_init(&nh);
while ((ns = netstack_next(&nh)) != NULL) {
ip_dce_reclaim_stack(ns->netstack_ip);
netstack_rele(ns);
}
netstack_next_fini(&nh);
}
/* ARGSUSED */
void
sctp_conn_reclaim(void *arg)
{
netstack_handle_t nh;
netstack_t *ns;
sctp_stack_t *sctps;
extern pgcnt_t lotsfree, needfree;
if (!sctp_do_reclaim)
return;
/*
* The reclaim function may be called even when the system is not
* really under memory pressure.
*/
if (freemem >= lotsfree + needfree)
return;
netstack_next_init(&nh);
while ((ns = netstack_next(&nh)) != NULL) {
int i;
int64_t tot_assoc = 0;
/*
* During boot time, the first netstack_t is created and
* initialized before SCTP has registered with the netstack
* framework. If this reclaim function is called before SCTP
* has finished its initialization, netstack_next() will
* return the first netstack_t (since its netstack_flags is
* not NSF_UNINIT). And its netstack_sctp will be NULL. We
* need to catch it.
*
* All subsequent netstack_t creation will not have this
* problem since the initialization is not finished until SCTP
* has finished its own sctp_stack_t initialization. Hence
* netstack_next() will not return one with NULL netstack_sctp.
*/
if ((sctps = ns->netstack_sctp) == NULL) {
netstack_rele(ns);
continue;
}
/*
* Even if the system is under memory pressure, the reason may
* not be because of SCTP activity. Check the number of
* associations in each stack. If the number exceeds the
* threshold (maxusers), turn on defensive mode.
*/
for (i = 0; i < sctps->sctps_sc_cnt; i++)
tot_assoc += sctps->sctps_sc[i]->sctp_sc_assoc_cnt;
if (tot_assoc < maxusers) {
netstack_rele(ns);
continue;
}
mutex_enter(&sctps->sctps_reclaim_lock);
if (!sctps->sctps_reclaim) {
sctps->sctps_reclaim = B_TRUE;
sctps->sctps_reclaim_tid = timeout(sctp_reclaim_timer,
sctps, MSEC_TO_TICK(sctps->sctps_reclaim_period));
SCTP_KSTAT(sctps, sctp_reclaim_cnt);
}
mutex_exit(&sctps->sctps_reclaim_lock);
netstack_rele(ns);
}
netstack_next_fini(&nh);
}
