29 void br_set_state(struct net_bridge_port *p, unsigned int state)  in br_set_state()  argument
32 		.orig_dev = p->dev,  in br_set_state()
42 	if (p->flags & BR_MRP_AWARE)  in br_set_state()
45 	p->state = state;  in br_set_state()
46 	err = switchdev_port_attr_set(p->dev, &attr, NULL);  in br_set_state()
48 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",  in br_set_state()
49 				(unsigned int) p->port_no, p->dev->name);  in br_set_state()
51 		br_info(p->br, "port %u(%s) entered %s state\n",  in br_set_state()
52 				(unsigned int) p->port_no, p->dev->name,  in br_set_state()
53 				br_port_state_names[p->state]);  in br_set_state()
55 	if (p->br->stp_enabled == BR_KERNEL_STP) {  in br_set_state()
56 		switch (p->state) {  in br_set_state()
58 			p->stp_xstats.transition_blk++;  in br_set_state()
61 			p->stp_xstats.transition_fwd++;  in br_set_state()
69 	struct net_bridge_port *p;  in br_port_get_stp_state()  local
73 	p = br_port_get_rtnl(dev);  in br_port_get_stp_state()
74 	if (!p)  in br_port_get_stp_state()
77 	return p->state;  in br_port_get_stp_state()
84 	struct net_bridge_port *p;  in br_get_port()  local
86 	list_for_each_entry_rcu(p, &br->port_list, list,  in br_get_port()
88 		if (p->port_no == port_no)  in br_get_port()
89 			return p;  in br_get_port()
96 static int br_should_become_root_port(const struct net_bridge_port *p,  in br_should_become_root_port()  argument
103 	br = p->br;  in br_should_become_root_port()
104 	if (p->state == BR_STATE_DISABLED ||  in br_should_become_root_port()
105 	    br_is_designated_port(p))  in br_should_become_root_port()
108 	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)  in br_should_become_root_port()
116 	t = memcmp(&p->designated_root, &rp->designated_root, 8);  in br_should_become_root_port()
122 	if (p->designated_cost + p->path_cost <  in br_should_become_root_port()
125 	else if (p->designated_cost + p->path_cost >  in br_should_become_root_port()
129 	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);  in br_should_become_root_port()
135 	if (p->designated_port < rp->designated_port)  in br_should_become_root_port()
137 	else if (p->designated_port > rp->designated_port)  in br_should_become_root_port()
140 	if (p->port_id < rp->port_id)  in br_should_become_root_port()
147 			       struct net_bridge_port *p)  in br_root_port_block()  argument
151 		  (unsigned int) p->port_no, p->dev->name);  in br_root_port_block()
153 	br_set_state(p, BR_STATE_LISTENING);  in br_root_port_block()
154 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_root_port_block()
157 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_root_port_block()
163 	struct net_bridge_port *p;  in br_root_selection()  local
166 	list_for_each_entry(p, &br->port_list, list) {  in br_root_selection()
167 		if (!br_should_become_root_port(p, root_port))  in br_root_selection()
170 		if (p->flags & BR_ROOT_BLOCK)  in br_root_selection()
171 			br_root_port_block(br, p);  in br_root_selection()
173 			root_port = p->port_no;  in br_root_selection()
182 		p = br_get_port(br, root_port);  in br_root_selection()
183 		br->designated_root = p->designated_root;  in br_root_selection()
184 		br->root_path_cost = p->designated_cost + p->path_cost;  in br_root_selection()
204 void br_transmit_config(struct net_bridge_port *p)  in br_transmit_config()  argument
209 	if (timer_pending(&p->hold_timer)) {  in br_transmit_config()
210 		p->config_pending = 1;  in br_transmit_config()
214 	br = p->br;  in br_transmit_config()
217 	bpdu.topology_change_ack = p->topology_change_ack;  in br_transmit_config()
221 	bpdu.port_id = p->port_id;  in br_transmit_config()
235 		br_send_config_bpdu(p, &bpdu);  in br_transmit_config()
236 		p->topology_change_ack = 0;  in br_transmit_config()
237 		p->config_pending = 0;  in br_transmit_config()
238 		if (p->br->stp_enabled == BR_KERNEL_STP)  in br_transmit_config()
239 			mod_timer(&p->hold_timer,  in br_transmit_config()
245 static void br_record_config_information(struct net_bridge_port *p,  in br_record_config_information()  argument
248 	p->designated_root = bpdu->root;  in br_record_config_information()
249 	p->designated_cost = bpdu->root_path_cost;  in br_record_config_information()
250 	p->designated_bridge = bpdu->bridge_id;  in br_record_config_information()
251 	p->designated_port = bpdu->port_id;  in br_record_config_information()
252 	p->designated_age = jiffies - bpdu->message_age;  in br_record_config_information()
254 	mod_timer(&p->message_age_timer, jiffies  in br_record_config_information()
271 	struct net_bridge_port *p;  in br_transmit_tcn()  local
273 	p = br_get_port(br, br->root_port);  in br_transmit_tcn()
274 	if (p)  in br_transmit_tcn()
275 		br_send_tcn_bpdu(p);  in br_transmit_tcn()
282 static int br_should_become_designated_port(const struct net_bridge_port *p)  in br_should_become_designated_port()  argument
287 	br = p->br;  in br_should_become_designated_port()
288 	if (br_is_designated_port(p))  in br_should_become_designated_port()
291 	if (memcmp(&p->designated_root, &br->designated_root, 8))  in br_should_become_designated_port()
294 	if (br->root_path_cost < p->designated_cost)  in br_should_become_designated_port()
296 	else if (br->root_path_cost > p->designated_cost)  in br_should_become_designated_port()
299 	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);  in br_should_become_designated_port()
305 	if (p->port_id < p->designated_port)  in br_should_become_designated_port()
314 	struct net_bridge_port *p;  in br_designated_port_selection()  local
316 	list_for_each_entry(p, &br->port_list, list) {  in br_designated_port_selection()
317 		if (p->state != BR_STATE_DISABLED &&  in br_designated_port_selection()
318 		    br_should_become_designated_port(p))  in br_designated_port_selection()
319 			br_become_designated_port(p);  in br_designated_port_selection()
325 static int br_supersedes_port_info(const struct net_bridge_port *p,  in br_supersedes_port_info()  argument
330 	t = memcmp(&bpdu->root, &p->designated_root, 8);  in br_supersedes_port_info()
336 	if (bpdu->root_path_cost < p->designated_cost)  in br_supersedes_port_info()
338 	else if (bpdu->root_path_cost > p->designated_cost)  in br_supersedes_port_info()
341 	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);  in br_supersedes_port_info()
347 	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))  in br_supersedes_port_info()
350 	if (bpdu->port_id <= p->designated_port)  in br_supersedes_port_info()
389 	struct net_bridge_port *p;  in br_config_bpdu_generation()  local
391 	list_for_each_entry(p, &br->port_list, list) {  in br_config_bpdu_generation()
392 		if (p->state != BR_STATE_DISABLED &&  in br_config_bpdu_generation()
393 		    br_is_designated_port(p))  in br_config_bpdu_generation()
394 			br_transmit_config(p);  in br_config_bpdu_generation()
399 static void br_reply(struct net_bridge_port *p)  in br_reply()  argument
401 	br_transmit_config(p);  in br_reply()
412 void br_become_designated_port(struct net_bridge_port *p)  in br_become_designated_port()  argument
416 	br = p->br;  in br_become_designated_port()
417 	p->designated_root = br->designated_root;  in br_become_designated_port()
418 	p->designated_cost = br->root_path_cost;  in br_become_designated_port()
419 	p->designated_bridge = br->bridge_id;  in br_become_designated_port()
420 	p->designated_port = p->port_id;  in br_become_designated_port()
425 static void br_make_blocking(struct net_bridge_port *p)  in br_make_blocking()  argument
427 	if (p->state != BR_STATE_DISABLED &&  in br_make_blocking()
428 	    p->state != BR_STATE_BLOCKING) {  in br_make_blocking()
429 		if (p->state == BR_STATE_FORWARDING ||  in br_make_blocking()
430 		    p->state == BR_STATE_LEARNING)  in br_make_blocking()
431 			br_topology_change_detection(p->br);  in br_make_blocking()
433 		br_set_state(p, BR_STATE_BLOCKING);  in br_make_blocking()
434 		br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_blocking()
436 		del_timer(&p->forward_delay_timer);  in br_make_blocking()
441 static void br_make_forwarding(struct net_bridge_port *p)  in br_make_forwarding()  argument
443 	struct net_bridge *br = p->br;  in br_make_forwarding()
445 	if (p->state != BR_STATE_BLOCKING)  in br_make_forwarding()
449 		br_set_state(p, BR_STATE_FORWARDING);  in br_make_forwarding()
451 		del_timer(&p->forward_delay_timer);  in br_make_forwarding()
453 		br_set_state(p, BR_STATE_LISTENING);  in br_make_forwarding()
455 		br_set_state(p, BR_STATE_LEARNING);  in br_make_forwarding()
457 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_forwarding()
460 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_make_forwarding()
466 	struct net_bridge_port *p;  in br_port_state_selection()  local
469 	list_for_each_entry(p, &br->port_list, list) {  in br_port_state_selection()
470 		if (p->state == BR_STATE_DISABLED)  in br_port_state_selection()
475 			if (p->port_no == br->root_port) {  in br_port_state_selection()
476 				p->config_pending = 0;  in br_port_state_selection()
477 				p->topology_change_ack = 0;  in br_port_state_selection()
478 				br_make_forwarding(p);  in br_port_state_selection()
479 			} else if (br_is_designated_port(p)) {  in br_port_state_selection()
480 				del_timer(&p->message_age_timer);  in br_port_state_selection()
481 				br_make_forwarding(p);  in br_port_state_selection()
483 				p->config_pending = 0;  in br_port_state_selection()
484 				p->topology_change_ack = 0;  in br_port_state_selection()
485 				br_make_blocking(p);  in br_port_state_selection()
489 		if (p->state != BR_STATE_BLOCKING)  in br_port_state_selection()
490 			br_multicast_enable_port(p);  in br_port_state_selection()
495 		if (p->state == BR_STATE_FORWARDING)  in br_port_state_selection()
506 static void br_topology_change_acknowledge(struct net_bridge_port *p)  in br_topology_change_acknowledge()  argument
508 	p->topology_change_ack = 1;  in br_topology_change_acknowledge()
509 	br_transmit_config(p);  in br_topology_change_acknowledge()
513 void br_received_config_bpdu(struct net_bridge_port *p,  in br_received_config_bpdu()  argument
519 	p->stp_xstats.rx_bpdu++;  in br_received_config_bpdu()
521 	br = p->br;  in br_received_config_bpdu()
524 	if (br_supersedes_port_info(p, bpdu)) {  in br_received_config_bpdu()
525 		br_record_config_information(p, bpdu);  in br_received_config_bpdu()
540 		if (p->port_no == br->root_port) {  in br_received_config_bpdu()
546 	} else if (br_is_designated_port(p)) {  in br_received_config_bpdu()
547 		br_reply(p);  in br_received_config_bpdu()
552 void br_received_tcn_bpdu(struct net_bridge_port *p)  in br_received_tcn_bpdu()  argument
554 	p->stp_xstats.rx_tcn++;  in br_received_tcn_bpdu()
556 	if (br_is_designated_port(p)) {  in br_received_tcn_bpdu()
557 		br_info(p->br, "port %u(%s) received tcn bpdu\n",  in br_received_tcn_bpdu()
558 			(unsigned int) p->port_no, p->dev->name);  in br_received_tcn_bpdu()
560 		br_topology_change_detection(p->br);  in br_received_tcn_bpdu()
561 		br_topology_change_acknowledge(p);  in br_received_tcn_bpdu()