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);  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()
70 	struct net_bridge_port *p;  in br_get_port()  local
72 	list_for_each_entry_rcu(p, &br->port_list, list,  in br_get_port()
74 		if (p->port_no == port_no)  in br_get_port()
75 			return p;  in br_get_port()
82 static int br_should_become_root_port(const struct net_bridge_port *p,  in br_should_become_root_port()  argument
89 	br = p->br;  in br_should_become_root_port()
90 	if (p->state == BR_STATE_DISABLED ||  in br_should_become_root_port()
91 	    br_is_designated_port(p))  in br_should_become_root_port()
94 	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)  in br_should_become_root_port()
102 	t = memcmp(&p->designated_root, &rp->designated_root, 8);  in br_should_become_root_port()
108 	if (p->designated_cost + p->path_cost <  in br_should_become_root_port()
111 	else if (p->designated_cost + p->path_cost >  in br_should_become_root_port()
115 	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);  in br_should_become_root_port()
121 	if (p->designated_port < rp->designated_port)  in br_should_become_root_port()
123 	else if (p->designated_port > rp->designated_port)  in br_should_become_root_port()
126 	if (p->port_id < rp->port_id)  in br_should_become_root_port()
133 			       struct net_bridge_port *p)  in br_root_port_block()  argument
137 		  (unsigned int) p->port_no, p->dev->name);  in br_root_port_block()
139 	br_set_state(p, BR_STATE_LISTENING);  in br_root_port_block()
140 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_root_port_block()
143 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_root_port_block()
149 	struct net_bridge_port *p;  in br_root_selection()  local
152 	list_for_each_entry(p, &br->port_list, list) {  in br_root_selection()
153 		if (!br_should_become_root_port(p, root_port))  in br_root_selection()
156 		if (p->flags & BR_ROOT_BLOCK)  in br_root_selection()
157 			br_root_port_block(br, p);  in br_root_selection()
159 			root_port = p->port_no;  in br_root_selection()
168 		p = br_get_port(br, root_port);  in br_root_selection()
169 		br->designated_root = p->designated_root;  in br_root_selection()
170 		br->root_path_cost = p->designated_cost + p->path_cost;  in br_root_selection()
190 void br_transmit_config(struct net_bridge_port *p)  in br_transmit_config()  argument
195 	if (timer_pending(&p->hold_timer)) {  in br_transmit_config()
196 		p->config_pending = 1;  in br_transmit_config()
200 	br = p->br;  in br_transmit_config()
203 	bpdu.topology_change_ack = p->topology_change_ack;  in br_transmit_config()
207 	bpdu.port_id = p->port_id;  in br_transmit_config()
221 		br_send_config_bpdu(p, &bpdu);  in br_transmit_config()
222 		p->topology_change_ack = 0;  in br_transmit_config()
223 		p->config_pending = 0;  in br_transmit_config()
224 		if (p->br->stp_enabled == BR_KERNEL_STP)  in br_transmit_config()
225 			mod_timer(&p->hold_timer,  in br_transmit_config()
231 static void br_record_config_information(struct net_bridge_port *p,  in br_record_config_information()  argument
234 	p->designated_root = bpdu->root;  in br_record_config_information()
235 	p->designated_cost = bpdu->root_path_cost;  in br_record_config_information()
236 	p->designated_bridge = bpdu->bridge_id;  in br_record_config_information()
237 	p->designated_port = bpdu->port_id;  in br_record_config_information()
238 	p->designated_age = jiffies - bpdu->message_age;  in br_record_config_information()
240 	mod_timer(&p->message_age_timer, jiffies  in br_record_config_information()
257 	struct net_bridge_port *p;  in br_transmit_tcn()  local
259 	p = br_get_port(br, br->root_port);  in br_transmit_tcn()
260 	if (p)  in br_transmit_tcn()
261 		br_send_tcn_bpdu(p);  in br_transmit_tcn()
268 static int br_should_become_designated_port(const struct net_bridge_port *p)  in br_should_become_designated_port()  argument
273 	br = p->br;  in br_should_become_designated_port()
274 	if (br_is_designated_port(p))  in br_should_become_designated_port()
277 	if (memcmp(&p->designated_root, &br->designated_root, 8))  in br_should_become_designated_port()
280 	if (br->root_path_cost < p->designated_cost)  in br_should_become_designated_port()
282 	else if (br->root_path_cost > p->designated_cost)  in br_should_become_designated_port()
285 	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);  in br_should_become_designated_port()
291 	if (p->port_id < p->designated_port)  in br_should_become_designated_port()
300 	struct net_bridge_port *p;  in br_designated_port_selection()  local
302 	list_for_each_entry(p, &br->port_list, list) {  in br_designated_port_selection()
303 		if (p->state != BR_STATE_DISABLED &&  in br_designated_port_selection()
304 		    br_should_become_designated_port(p))  in br_designated_port_selection()
305 			br_become_designated_port(p);  in br_designated_port_selection()
311 static int br_supersedes_port_info(const struct net_bridge_port *p,  in br_supersedes_port_info()  argument
316 	t = memcmp(&bpdu->root, &p->designated_root, 8);  in br_supersedes_port_info()
322 	if (bpdu->root_path_cost < p->designated_cost)  in br_supersedes_port_info()
324 	else if (bpdu->root_path_cost > p->designated_cost)  in br_supersedes_port_info()
327 	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);  in br_supersedes_port_info()
333 	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))  in br_supersedes_port_info()
336 	if (bpdu->port_id <= p->designated_port)  in br_supersedes_port_info()
375 	struct net_bridge_port *p;  in br_config_bpdu_generation()  local
377 	list_for_each_entry(p, &br->port_list, list) {  in br_config_bpdu_generation()
378 		if (p->state != BR_STATE_DISABLED &&  in br_config_bpdu_generation()
379 		    br_is_designated_port(p))  in br_config_bpdu_generation()
380 			br_transmit_config(p);  in br_config_bpdu_generation()
385 static void br_reply(struct net_bridge_port *p)  in br_reply()  argument
387 	br_transmit_config(p);  in br_reply()
398 void br_become_designated_port(struct net_bridge_port *p)  in br_become_designated_port()  argument
402 	br = p->br;  in br_become_designated_port()
403 	p->designated_root = br->designated_root;  in br_become_designated_port()
404 	p->designated_cost = br->root_path_cost;  in br_become_designated_port()
405 	p->designated_bridge = br->bridge_id;  in br_become_designated_port()
406 	p->designated_port = p->port_id;  in br_become_designated_port()
411 static void br_make_blocking(struct net_bridge_port *p)  in br_make_blocking()  argument
413 	if (p->state != BR_STATE_DISABLED &&  in br_make_blocking()
414 	    p->state != BR_STATE_BLOCKING) {  in br_make_blocking()
415 		if (p->state == BR_STATE_FORWARDING ||  in br_make_blocking()
416 		    p->state == BR_STATE_LEARNING)  in br_make_blocking()
417 			br_topology_change_detection(p->br);  in br_make_blocking()
419 		br_set_state(p, BR_STATE_BLOCKING);  in br_make_blocking()
420 		br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_blocking()
422 		del_timer(&p->forward_delay_timer);  in br_make_blocking()
427 static void br_make_forwarding(struct net_bridge_port *p)  in br_make_forwarding()  argument
429 	struct net_bridge *br = p->br;  in br_make_forwarding()
431 	if (p->state != BR_STATE_BLOCKING)  in br_make_forwarding()
435 		br_set_state(p, BR_STATE_FORWARDING);  in br_make_forwarding()
437 		del_timer(&p->forward_delay_timer);  in br_make_forwarding()
439 		br_set_state(p, BR_STATE_LISTENING);  in br_make_forwarding()
441 		br_set_state(p, BR_STATE_LEARNING);  in br_make_forwarding()
443 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_forwarding()
446 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_make_forwarding()
452 	struct net_bridge_port *p;  in br_port_state_selection()  local
455 	list_for_each_entry(p, &br->port_list, list) {  in br_port_state_selection()
456 		if (p->state == BR_STATE_DISABLED)  in br_port_state_selection()
461 			if (p->port_no == br->root_port) {  in br_port_state_selection()
462 				p->config_pending = 0;  in br_port_state_selection()
463 				p->topology_change_ack = 0;  in br_port_state_selection()
464 				br_make_forwarding(p);  in br_port_state_selection()
465 			} else if (br_is_designated_port(p)) {  in br_port_state_selection()
466 				del_timer(&p->message_age_timer);  in br_port_state_selection()
467 				br_make_forwarding(p);  in br_port_state_selection()
469 				p->config_pending = 0;  in br_port_state_selection()
470 				p->topology_change_ack = 0;  in br_port_state_selection()
471 				br_make_blocking(p);  in br_port_state_selection()
475 		if (p->state != BR_STATE_BLOCKING)  in br_port_state_selection()
476 			br_multicast_enable_port(p);  in br_port_state_selection()
481 		if (p->state == BR_STATE_FORWARDING)  in br_port_state_selection()
492 static void br_topology_change_acknowledge(struct net_bridge_port *p)  in br_topology_change_acknowledge()  argument
494 	p->topology_change_ack = 1;  in br_topology_change_acknowledge()
495 	br_transmit_config(p);  in br_topology_change_acknowledge()
499 void br_received_config_bpdu(struct net_bridge_port *p,  in br_received_config_bpdu()  argument
505 	p->stp_xstats.rx_bpdu++;  in br_received_config_bpdu()
507 	br = p->br;  in br_received_config_bpdu()
510 	if (br_supersedes_port_info(p, bpdu)) {  in br_received_config_bpdu()
511 		br_record_config_information(p, bpdu);  in br_received_config_bpdu()
526 		if (p->port_no == br->root_port) {  in br_received_config_bpdu()
532 	} else if (br_is_designated_port(p)) {  in br_received_config_bpdu()
533 		br_reply(p);  in br_received_config_bpdu()
538 void br_received_tcn_bpdu(struct net_bridge_port *p)  in br_received_tcn_bpdu()  argument
540 	p->stp_xstats.rx_tcn++;  in br_received_tcn_bpdu()
542 	if (br_is_designated_port(p)) {  in br_received_tcn_bpdu()
543 		br_info(p->br, "port %u(%s) received tcn bpdu\n",  in br_received_tcn_bpdu()
544 			(unsigned int) p->port_no, p->dev->name);  in br_received_tcn_bpdu()
546 		br_topology_change_detection(p->br);  in br_received_tcn_bpdu()
547 		br_topology_change_acknowledge(p);  in br_received_tcn_bpdu()