35  *    Or not - resetting the counter and bridging the frame would create a
39  *    frame is received from a particular node, we know something is wrong.
87 					   struct hsr_frame_info *frame)  in create_stripped_skb()  argument
105 	if (frame->is_vlan)  in create_stripped_skb()
115 static struct sk_buff *frame_get_stripped_skb(struct hsr_frame_info *frame,  in frame_get_stripped_skb()  argument
118 	if (!frame->skb_std)  in frame_get_stripped_skb()
119 		frame->skb_std = create_stripped_skb(frame->skb_hsr, frame);  in frame_get_stripped_skb()
120 	return skb_clone(frame->skb_std, GFP_ATOMIC);  in frame_get_stripped_skb()
123 static void hsr_fill_tag(struct sk_buff *skb, struct hsr_frame_info *frame,  in hsr_fill_tag()  argument
136 	if (frame->is_vlan)  in hsr_fill_tag()
143 	hsr_ethhdr->hsr_tag.sequence_nr = htons(frame->sequence_nr);  in hsr_fill_tag()
150 					 struct hsr_frame_info *frame,  in create_tagged_skb()  argument
167 	if (frame->is_vlan)  in create_tagged_skb()
175 	hsr_fill_tag(skb, frame, port, port->hsr->prot_version);  in create_tagged_skb()
180 /* If the original frame was an HSR tagged frame, just clone it to be sent
181  * unchanged. Otherwise, create a private frame especially tagged for 'port'.
183 static struct sk_buff *frame_get_tagged_skb(struct hsr_frame_info *frame,  in frame_get_tagged_skb()  argument
186 	if (frame->skb_hsr)  in frame_get_tagged_skb()
187 		return skb_clone(frame->skb_hsr, GFP_ATOMIC);  in frame_get_tagged_skb()
190 		WARN_ONCE(1, "HSR: Bug: trying to create a tagged frame for a non-ring port");  in frame_get_tagged_skb()
194 	return create_tagged_skb(frame->skb_std, frame, port);  in frame_get_tagged_skb()
218 		    struct hsr_frame_info *frame)  in hsr_xmit()  argument
220 	if (frame->port_rcv->type == HSR_PT_MASTER) {  in hsr_xmit()
221 		hsr_addr_subst_dest(frame->node_src, skb, port);  in hsr_xmit()
224 		 * address of outgoing frame with that of the outgoing slave's.  in hsr_xmit()
231 /* Forward the frame through all devices except:
233  * - If it's a HSR frame: through a device where it has passed before
234  * - To the local HSR master only if the frame is directly addressed to it, or
235  *   a non-supervision multicast or broadcast frame.
237  * HSR slave devices should insert a HSR tag into the frame, or forward the
238  * frame unchanged if it's already tagged. Interlink devices should strip HSR
242 static void hsr_forward_do(struct hsr_frame_info *frame)  in hsr_forward_do()  argument
247 	hsr_for_each_port(frame->port_rcv->hsr, port) {  in hsr_forward_do()
248 		/* Don't send frame back the way it came */  in hsr_forward_do()
249 		if (port == frame->port_rcv)  in hsr_forward_do()
253 		if (port->type == HSR_PT_MASTER && !frame->is_local_dest)  in hsr_forward_do()
257 		if (port->type != HSR_PT_MASTER && frame->is_local_exclusive)  in hsr_forward_do()
260 		/* Don't send frame over port where it has been sent before */  in hsr_forward_do()
261 		if (hsr_register_frame_out(port, frame->node_src,  in hsr_forward_do()
262 					   frame->sequence_nr))  in hsr_forward_do()
265 		if (frame->is_supervision && port->type == HSR_PT_MASTER) {  in hsr_forward_do()
266 			hsr_handle_sup_frame(frame->skb_hsr,  in hsr_forward_do()
267 					     frame->node_src,  in hsr_forward_do()
268 					     frame->port_rcv);  in hsr_forward_do()
273 			skb = frame_get_tagged_skb(frame, port);  in hsr_forward_do()
275 			skb = frame_get_stripped_skb(frame, port);  in hsr_forward_do()
277 			/* FIXME: Record the dropped frame? */  in hsr_forward_do()
283 			hsr_deliver_master(skb, port->dev, frame->node_src);  in hsr_forward_do()
285 			hsr_xmit(skb, port, frame);  in hsr_forward_do()
290 			     struct hsr_frame_info *frame)  in check_local_dest()  argument
293 		frame->is_local_exclusive = true;  in check_local_dest()
296 		frame->is_local_exclusive = false;  in check_local_dest()
302 		frame->is_local_dest = true;  in check_local_dest()
304 		frame->is_local_dest = false;  in check_local_dest()
308 static int hsr_fill_frame_info(struct hsr_frame_info *frame,  in hsr_fill_frame_info()  argument
314 	frame->is_supervision = is_supervision_frame(port->hsr, skb);  in hsr_fill_frame_info()
315 	frame->node_src = hsr_get_node(port, skb, frame->is_supervision);  in hsr_fill_frame_info()
316 	if (!frame->node_src)  in hsr_fill_frame_info()
320 	frame->is_vlan = false;  in hsr_fill_frame_info()
322 		frame->is_vlan = true;  in hsr_fill_frame_info()
328 		frame->skb_std = NULL;  in hsr_fill_frame_info()
329 		frame->skb_hsr = skb;  in hsr_fill_frame_info()
330 		frame->sequence_nr = hsr_get_skb_sequence_nr(skb);  in hsr_fill_frame_info()
332 		frame->skb_std = skb;  in hsr_fill_frame_info()
333 		frame->skb_hsr = NULL;  in hsr_fill_frame_info()
336 		frame->sequence_nr = port->hsr->sequence_nr;  in hsr_fill_frame_info()
341 	frame->port_rcv = port;  in hsr_fill_frame_info()
342 	check_local_dest(port->hsr, skb, frame);  in hsr_fill_frame_info()
350 	struct hsr_frame_info frame;  in hsr_forward_skb()  local
353 		WARN_ONCE(1, "%s:%d: Malformed frame (port_src %s)\n",  in hsr_forward_skb()
358 	if (hsr_fill_frame_info(&frame, skb, port) < 0)  in hsr_forward_skb()
360 	hsr_register_frame_in(frame.node_src, port, frame.sequence_nr);  in hsr_forward_skb()
361 	hsr_forward_do(&frame);  in hsr_forward_skb()
370 	if (frame.skb_hsr)  in hsr_forward_skb()
371 		kfree_skb(frame.skb_hsr);  in hsr_forward_skb()
372 	if (frame.skb_std)  in hsr_forward_skb()
373 		kfree_skb(frame.skb_std);  in hsr_forward_skb()