static void
make_path( routing_switch *routing_switch, uint64_t in_datapath_id, uint16_t in_port,
uint64_t out_datapath_id, uint16_t out_port, const buffer *packet ) {
dlist_element *hops = resolve_path( routing_switch->path_resolver, in_datapath_id, in_port, out_datapath_id, out_port );
if ( hops == NULL ) {
warn( "No available path found ( %#" PRIx64 ":%u -> %#" PRIx64 ":%u ).",
in_datapath_id, in_port, out_datapath_id, out_port );
discard_packet_in( in_datapath_id, in_port, packet );
return;
}
// ask path manager to install flow entries
size_t length = offsetof( path_manager_path, hops ) + sizeof( path_manager_hop ) * count_hops( hops );
path_manager_path *path = xmalloc( length );
set_match_from_packet( &path->match, OFPP_NONE, 0, packet );
path->n_hops = count_hops( hops );
dlist_element *e = get_first_element( hops );
for( int i = 0; e != NULL; e = e->next, i++ ) {
path_resolver_hop *hop = e->data;
path->hops[ i ].datapath_id = hop->dpid;
path->hops[ i ].in_port = hop->in_port_no;
path->hops[ i ].out_port = hop->out_port_no;
}
send_message( PATH_SETUP_SERVICE_NAME, MESSENGER_PATH_SETUP_REQUEST, ( void * ) path, length );
xfree( path );
// send packet out to tail switch
output_packet_from_last_switch( hops, packet );
// free hop list
free_hop_list( hops );
}
static void
make_path( routing_switch *routing_switch, uint64_t in_datapath_id, uint16_t in_port,
uint64_t out_datapath_id, uint16_t out_port, const buffer *packet ) {
dlist_element *hops = resolve_path( routing_switch->pathresolver, in_datapath_id, in_port, out_datapath_id, out_port );
if ( hops == NULL ) {
warn( "No available path found ( %#" PRIx64 ":%u -> %#" PRIx64 ":%u ).",
in_datapath_id, in_port, out_datapath_id, out_port );
discard_packet_in( in_datapath_id, in_port, packet );
return;
}
// count elements
uint32_t hop_count = count_hops( hops );
// send flow entry from tail switch
for ( dlist_element *e = get_last_element( hops ); e != NULL; e = e->prev, hop_count-- ) {
uint16_t idle_timer = ( uint16_t ) ( routing_switch->idle_timeout + hop_count );
modify_flow_entry( e->data, packet, idle_timer );
} // for(;;)
// send packet out for tail switch
dlist_element *e = get_last_element( hops );
pathresolver_hop *last_hop = e->data;
output_packet_from_last_switch( last_hop, packet );
// free them
free_hop_list( hops );
}
static void xping (flux_t *h, uint32_t nodeid, uint32_t xnodeid, const char *svc)
{
flux_future_t *f;
const char *route;
if (!(f = flux_rpc_pack (h, "req.xping", nodeid, 0,
"{s:i s:s}", "rank", xnodeid, "service", svc))
|| flux_rpc_get_unpack (f, "{s:s}", "route", &route) < 0)
log_err_exit ("req.xping");
printf ("hops=%d\n", count_hops (route));
flux_future_destroy (f);
}
static void
resolve_path_replied( void *user_data, dlist_element *hops ) {
assert( user_data != NULL );
resolve_path_replied_params *param = user_data;
routing_switch *routing_switch = param->routing_switch;
buffer *original_packet = param->original_packet;
if ( hops == NULL ) {
warn( "No available path found." );
free_buffer( original_packet );
xfree( param );
return;
}
original_packet->user_data = NULL;
if ( !parse_packet( original_packet ) ) {
warn( "Received unsupported packet" );
free_packet( original_packet );
free_hop_list( hops );
xfree( param );
return;
}
// count elements
uint32_t hop_count = count_hops( hops );
// send flow entry from tail switch
for ( dlist_element *e = get_last_element( hops ); e != NULL; e = e->prev, hop_count-- ) {
uint16_t idle_timer = ( uint16_t ) ( routing_switch->idle_timeout + hop_count );
modify_flow_entry( e->data, original_packet, idle_timer );
} // for(;;)
// send packet out for tail switch
dlist_element *e = get_last_element( hops );
pathresolver_hop *last_hop = e->data;
output_packet_from_last_switch( last_hop, original_packet );
// free them
free_hop_list( hops );
free_packet( original_packet );
xfree( param );
}
static void xping (flux_t *h, uint32_t nodeid, uint32_t xnodeid, const char *svc)
{
flux_future_t *f;
const char *json_str;
json_object *in = Jnew ();
json_object *out = NULL;
const char *route;
Jadd_int (in, "rank", xnodeid);
Jadd_str (in, "service", svc);
if (!(f = flux_rpc (h, "req.xping", Jtostr (in), nodeid, 0))
|| flux_rpc_get (f, &json_str) < 0)
log_err_exit ("req.xping");
if (!json_str
|| !(out = Jfromstr (json_str))
|| !Jget_str (out, "route", &route))
log_errn_exit (EPROTO, "req.xping");
printf ("hops=%d\n", count_hops (route));
Jput (out);
Jput (in);
flux_future_destroy (f);
}
