/**
* Process a ping message
*
* \param[in] ping Ping to process
*/
static void
sup_process_ping(const sup_ping_t *ping)
{
sup_node_t *node;
#ifdef WITH_TRACE
__trace("<-- from node %u: incarnation=%hu", ping->sender, ping->incarnation);
sup_view_debug(&ping->view);
#endif
EXA_ASSERT(sup_check_ping(ping, 'R'));
node = sup_cluster_node(&cluster, ping->sender);
if (node == NULL)
{
/* First time the node is seen, let's add it to the cluster */
sup_cluster_add_node(&cluster, ping->sender);
node = sup_cluster_node(&cluster, ping->sender);
EXA_ASSERT(node);
}
if (node != self)
update_node_info(node, ping);
switch (self->view.state)
{
case SUP_STATE_UNKNOWN:
/* Can't possibly be in UNKNOWN state */
EXA_ASSERT(false);
break;
case SUP_STATE_CHANGE:
state_change_process_ping(ping);
break;
case SUP_STATE_ACCEPT:
state_accept_process_ping(ping);
break;
case SUP_STATE_COMMIT:
state_commit_process_ping(ping);
break;
}
}
/**
* Send a ping to all instances of Csupd using examsg.
*
* \param[in] cluster Cluster
* \param[in] view View to send
*/
void
sup_send_ping(const sup_cluster_t *cluster, const sup_view_t *view)
{
sup_ping_msg_t ping_msg;
int err;
ping_msg.any.type = EXAMSG_SUP_PING;
ping_msg.ping.sender = cluster->self->id;
ping_msg.ping.incarnation = cluster->self->incarnation;
sup_view_copy(&ping_msg.ping.view, view);
EXA_ASSERT(sup_check_ping(&ping_msg.ping, 'S'));
err = examsgSendNoBlock(sup_mh, EXAMSG_CMSGD_ID, EXAMSG_LOCALHOST,
&ping_msg, sizeof(ping_msg));
if (err != sizeof(ping_msg))
__debug("cannot send ping : %s (%d)", exa_error_msg(err), err);
}