41  *    Or not - resetting the counter and bridging the frame would create a
45  *    frame is received from a particular node, we know something is wrong.
94 					   struct hsr_frame_info *frame)  in create_stripped_skb()  argument
112 	if (frame->is_vlan)  in create_stripped_skb()
122 static struct sk_buff *frame_get_stripped_skb(struct hsr_frame_info *frame,  in frame_get_stripped_skb()  argument
125 	if (!frame->skb_std)  in frame_get_stripped_skb()
126 		frame->skb_std = create_stripped_skb(frame->skb_hsr, frame);  in frame_get_stripped_skb()
127 	return skb_clone(frame->skb_std, GFP_ATOMIC);  in frame_get_stripped_skb()
131 static void hsr_fill_tag(struct sk_buff *skb, struct hsr_frame_info *frame,  in hsr_fill_tag()  argument
144 	if (frame->is_vlan)  in hsr_fill_tag()
151 	hsr_ethhdr->hsr_tag.sequence_nr = htons(frame->sequence_nr);  in hsr_fill_tag()
158 					 struct hsr_frame_info *frame,  in create_tagged_skb()  argument
175 	if (frame->is_vlan)  in create_tagged_skb()
183 	hsr_fill_tag(skb, frame, port, port->hsr->protVersion);  in create_tagged_skb()
188 /* If the original frame was an HSR tagged frame, just clone it to be sent
189  * unchanged. Otherwise, create a private frame especially tagged for 'port'.
191 static struct sk_buff *frame_get_tagged_skb(struct hsr_frame_info *frame,  in frame_get_tagged_skb()  argument
194 	if (frame->skb_hsr)  in frame_get_tagged_skb()
195 		return skb_clone(frame->skb_hsr, GFP_ATOMIC);  in frame_get_tagged_skb()
198 		WARN_ONCE(1, "HSR: Bug: trying to create a tagged frame for a non-ring port");  in frame_get_tagged_skb()
202 	return create_tagged_skb(frame->skb_std, frame, port);  in frame_get_tagged_skb()
227 		    struct hsr_frame_info *frame)  in hsr_xmit()  argument
229 	if (frame->port_rcv->type == HSR_PT_MASTER) {  in hsr_xmit()
230 		hsr_addr_subst_dest(frame->node_src, skb, port);  in hsr_xmit()
233 		 * address of outgoing frame with that of the outgoing slave's.  in hsr_xmit()
241 /* Forward the frame through all devices except:
243  * - If it's a HSR frame: through a device where it has passed before
244  * - To the local HSR master only if the frame is directly addressed to it, or
245  *   a non-supervision multicast or broadcast frame.
247  * HSR slave devices should insert a HSR tag into the frame, or forward the
248  * frame unchanged if it's already tagged. Interlink devices should strip HSR
252 static void hsr_forward_do(struct hsr_frame_info *frame)  in hsr_forward_do()  argument
257 	hsr_for_each_port(frame->port_rcv->hsr, port) {  in hsr_forward_do()
258 		/* Don't send frame back the way it came */  in hsr_forward_do()
259 		if (port == frame->port_rcv)  in hsr_forward_do()
263 		if ((port->type == HSR_PT_MASTER) && !frame->is_local_dest)  in hsr_forward_do()
267 		if ((port->type != HSR_PT_MASTER) && frame->is_local_exclusive)  in hsr_forward_do()
270 		/* Don't send frame over port where it has been sent before */  in hsr_forward_do()
271 		if (hsr_register_frame_out(port, frame->node_src,  in hsr_forward_do()
272 					   frame->sequence_nr))  in hsr_forward_do()
275 		if (frame->is_supervision && (port->type == HSR_PT_MASTER)) {  in hsr_forward_do()
276 			hsr_handle_sup_frame(frame->skb_hsr,  in hsr_forward_do()
277 					     frame->node_src,  in hsr_forward_do()
278 					     frame->port_rcv);  in hsr_forward_do()
283 			skb = frame_get_tagged_skb(frame, port);  in hsr_forward_do()
285 			skb = frame_get_stripped_skb(frame, port);  in hsr_forward_do()
287 			/* FIXME: Record the dropped frame? */  in hsr_forward_do()
293 			hsr_deliver_master(skb, port->dev, frame->node_src);  in hsr_forward_do()
295 			hsr_xmit(skb, port, frame);  in hsr_forward_do()
301 			     struct hsr_frame_info *frame)  in check_local_dest()  argument
304 		frame->is_local_exclusive = true;  in check_local_dest()
307 		frame->is_local_exclusive = false;  in check_local_dest()
313 		frame->is_local_dest = true;  in check_local_dest()
315 		frame->is_local_dest = false;  in check_local_dest()
320 static int hsr_fill_frame_info(struct hsr_frame_info *frame,  in hsr_fill_frame_info()  argument
326 	frame->is_supervision = is_supervision_frame(port->hsr, skb);  in hsr_fill_frame_info()
327 	frame->node_src = hsr_get_node(port, skb, frame->is_supervision);  in hsr_fill_frame_info()
328 	if (frame->node_src == NULL)  in hsr_fill_frame_info()
332 	frame->is_vlan = false;  in hsr_fill_frame_info()
334 		frame->is_vlan = true;  in hsr_fill_frame_info()
340 		frame->skb_std = NULL;  in hsr_fill_frame_info()
341 		frame->skb_hsr = skb;  in hsr_fill_frame_info()
342 		frame->sequence_nr = hsr_get_skb_sequence_nr(skb);  in hsr_fill_frame_info()
344 		frame->skb_std = skb;  in hsr_fill_frame_info()
345 		frame->skb_hsr = NULL;  in hsr_fill_frame_info()
348 		frame->sequence_nr = port->hsr->sequence_nr;  in hsr_fill_frame_info()
353 	frame->port_rcv = port;  in hsr_fill_frame_info()
354 	check_local_dest(port->hsr, skb, frame);  in hsr_fill_frame_info()
362 	struct hsr_frame_info frame;  in hsr_forward_skb()  local
365 		WARN_ONCE(1, "%s:%d: Malformed frame (port_src %s)\n",  in hsr_forward_skb()
370 	if (hsr_fill_frame_info(&frame, skb, port) < 0)  in hsr_forward_skb()
372 	hsr_register_frame_in(frame.node_src, port, frame.sequence_nr);  in hsr_forward_skb()
373 	hsr_forward_do(&frame);  in hsr_forward_skb()
375 	if (frame.skb_hsr != NULL)  in hsr_forward_skb()
376 		kfree_skb(frame.skb_hsr);  in hsr_forward_skb()
377 	if (frame.skb_std != NULL)  in hsr_forward_skb()
378 		kfree_skb(frame.skb_std);  in hsr_forward_skb()