7  * Frame router for HSR and PRP.
20 /* The uses I can see for these HSR supervision frames are:
35 static bool is_supervision_frame(struct hsr_priv *hsr, struct sk_buff *skb)  in is_supervision_frame()  argument
48 			      hsr->sup_multicast_addr))  in is_supervision_frame()
63 		if (hsr_V1_hdr->hsr.encap_proto != htons(ETH_P_PRP))  in is_supervision_frame()
120 static bool is_proxy_supervision_frame(struct hsr_priv *hsr,  in is_proxy_supervision_frame()  argument
129 	/* Get the HSR protocol revision. */  in is_proxy_supervision_frame()
142 	/* For RedBox (HSR-SAN) check if we have received the supervision  in is_proxy_supervision_frame()
145 	return hsr_is_node_in_db(&hsr->proxy_node_db,  in is_proxy_supervision_frame()
232 	lane_id |= port->hsr->net_id;  in prp_set_lan_id()
273 	if (port->hsr->prot_version) {  in hsr_set_path_id()
296 	/* pad to minimum packet size which is 60 + 6 (HSR tag) */  in hsr_fill_tag()
311 		 * the hsr tag is after the vlan tag.  in hsr_fill_tag()
328 /* If the original frame was an HSR tagged frame, just clone it to be sent
349 	/* Create the new skb with enough headroom to fit the HSR tag */  in hsr_create_tagged_frame()
371 	return hsr_fill_tag(skb, frame, port, port->hsr->prot_version);  in hsr_create_tagged_frame()
432 	/* When HSR node is used as RedBox - the frame received from HSR ring  in hsr_xmit()
438 				port->hsr->macaddress_redbox);  in hsr_xmit()
460 	 * Do not send HSR supervisory frames to SAN devices  in hsr_drop_frame()
465 	/* Do not forward to other HSR port (A or B) unicast frames which  in hsr_drop_frame()
471 	    hsr_is_node_in_db(&port->hsr->proxy_node_db,  in hsr_drop_frame()
484 		    hsr_is_node_in_db(&port->hsr->node_db,  in hsr_drop_frame()
498 		    hsr_is_node_in_db(&port->hsr->proxy_node_db,  in hsr_drop_frame()
509  * - If it's a HSR frame: through a device where it has passed before
511  * - To the local HSR master only if the frame is directly addressed to it, or
514  * HSR slave devices should insert a HSR tag into the frame, or forward the
515  * frame unchanged if it's already tagged. Interlink devices should strip HSR
516  * tags if they're of the non-HSR type (but only after duplicate discard). The
517  * master device always strips HSR tags.
525 	hsr_for_each_port(frame->port_rcv->hsr, port) {  in hsr_forward_do()
526 		struct hsr_priv *hsr = port->hsr;  in hsr_forward_do()  local
549 		    hsr->proto_ops->register_frame_out &&  in hsr_forward_do()
550 		    hsr->proto_ops->register_frame_out(port, frame))  in hsr_forward_do()
560 		 * between ports, or sending HSR supervision to RedBox.  in hsr_forward_do()
562 		if (hsr->proto_ops->drop_frame &&  in hsr_forward_do()
563 		    hsr->proto_ops->drop_frame(frame, port))  in hsr_forward_do()
568 			skb = hsr->proto_ops->create_tagged_frame(frame, port);  in hsr_forward_do()
570 			skb = hsr->proto_ops->get_untagged_frame(frame, port);  in hsr_forward_do()
589 static void check_local_dest(struct hsr_priv *hsr, struct sk_buff *skb,  in check_local_dest()  argument
592 	if (hsr_addr_is_self(hsr, eth_hdr(skb)->h_dest)) {  in check_local_dest()
612 	struct hsr_priv *hsr = port->hsr;  in handle_std_frame()  local
624 		lockdep_assert_held(&hsr->seqnr_lock);  in handle_std_frame()
625 		frame->sequence_nr = hsr->sequence_nr;  in handle_std_frame()
626 		hsr->sequence_nr++;  in handle_std_frame()
634 	struct hsr_priv *hsr = port->hsr;  in hsr_fill_frame_info()  local
637 	if ((!hsr->prot_version && proto == htons(ETH_P_PRP)) ||  in hsr_fill_frame_info()
643 		/* HSR tagged frame :- Data or Supervision */  in hsr_fill_frame_info()
679 	struct hsr_priv *hsr = port->hsr;  in fill_frame_info()  local
691 	frame->is_supervision = is_supervision_frame(port->hsr, skb);  in fill_frame_info()
692 	if (frame->is_supervision && hsr->redbox)  in fill_frame_info()
694 			is_proxy_supervision_frame(port->hsr, skb);  in fill_frame_info()
696 	n_db = &hsr->node_db;  in fill_frame_info()
698 		n_db = &hsr->proxy_node_db;  in fill_frame_info()
724 	ret = hsr->proto_ops->fill_frame_info(proto, skb, frame);  in fill_frame_info()
728 	check_local_dest(port->hsr, skb, frame);  in fill_frame_info()