33 void br_log_state(const struct net_bridge_port *p)  in br_log_state()  argument
35 	br_info(p->br, "port %u(%s) entered %s state\n",  in br_log_state()
36 		(unsigned int) p->port_no, p->dev->name,  in br_log_state()
37 		br_port_state_names[p->state]);  in br_log_state()
40 void br_set_state(struct net_bridge_port *p, unsigned int state)  in br_set_state()  argument
49 	p->state = state;  in br_set_state()
50 	err = switchdev_port_attr_set(p->dev, &attr);  in br_set_state()
52 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",  in br_set_state()
53 				(unsigned int) p->port_no, p->dev->name);  in br_set_state()
59 	struct net_bridge_port *p;  in br_get_port()  local
61 	list_for_each_entry_rcu(p, &br->port_list, list) {  in br_get_port()
62 		if (p->port_no == port_no)  in br_get_port()
63 			return p;  in br_get_port()
70 static int br_should_become_root_port(const struct net_bridge_port *p,  in br_should_become_root_port()  argument
77 	br = p->br;  in br_should_become_root_port()
78 	if (p->state == BR_STATE_DISABLED ||  in br_should_become_root_port()
79 	    br_is_designated_port(p))  in br_should_become_root_port()
82 	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)  in br_should_become_root_port()
90 	t = memcmp(&p->designated_root, &rp->designated_root, 8);  in br_should_become_root_port()
96 	if (p->designated_cost + p->path_cost <  in br_should_become_root_port()
99 	else if (p->designated_cost + p->path_cost >  in br_should_become_root_port()
103 	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);  in br_should_become_root_port()
109 	if (p->designated_port < rp->designated_port)  in br_should_become_root_port()
111 	else if (p->designated_port > rp->designated_port)  in br_should_become_root_port()
114 	if (p->port_id < rp->port_id)  in br_should_become_root_port()
121 			       struct net_bridge_port *p)  in br_root_port_block()  argument
125 		  (unsigned int) p->port_no, p->dev->name);  in br_root_port_block()
127 	br_set_state(p, BR_STATE_LISTENING);  in br_root_port_block()
128 	br_log_state(p);  in br_root_port_block()
129 	br_ifinfo_notify(RTM_NEWLINK, p);  in br_root_port_block()
132 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_root_port_block()
138 	struct net_bridge_port *p;  in br_root_selection()  local
141 	list_for_each_entry(p, &br->port_list, list) {  in br_root_selection()
142 		if (!br_should_become_root_port(p, root_port))  in br_root_selection()
145 		if (p->flags & BR_ROOT_BLOCK)  in br_root_selection()
146 			br_root_port_block(br, p);  in br_root_selection()
148 			root_port = p->port_no;  in br_root_selection()
157 		p = br_get_port(br, root_port);  in br_root_selection()
158 		br->designated_root = p->designated_root;  in br_root_selection()
159 		br->root_path_cost = p->designated_cost + p->path_cost;  in br_root_selection()
179 void br_transmit_config(struct net_bridge_port *p)  in br_transmit_config()  argument
184 	if (timer_pending(&p->hold_timer)) {  in br_transmit_config()
185 		p->config_pending = 1;  in br_transmit_config()
189 	br = p->br;  in br_transmit_config()
192 	bpdu.topology_change_ack = p->topology_change_ack;  in br_transmit_config()
196 	bpdu.port_id = p->port_id;  in br_transmit_config()
210 		br_send_config_bpdu(p, &bpdu);  in br_transmit_config()
211 		p->topology_change_ack = 0;  in br_transmit_config()
212 		p->config_pending = 0;  in br_transmit_config()
213 		if (p->br->stp_enabled == BR_KERNEL_STP)  in br_transmit_config()
214 			mod_timer(&p->hold_timer,  in br_transmit_config()
220 static void br_record_config_information(struct net_bridge_port *p,  in br_record_config_information()  argument
223 	p->designated_root = bpdu->root;  in br_record_config_information()
224 	p->designated_cost = bpdu->root_path_cost;  in br_record_config_information()
225 	p->designated_bridge = bpdu->bridge_id;  in br_record_config_information()
226 	p->designated_port = bpdu->port_id;  in br_record_config_information()
227 	p->designated_age = jiffies - bpdu->message_age;  in br_record_config_information()
229 	mod_timer(&p->message_age_timer, jiffies  in br_record_config_information()
246 	struct net_bridge_port *p;  in br_transmit_tcn()  local
248 	p = br_get_port(br, br->root_port);  in br_transmit_tcn()
249 	if (p)  in br_transmit_tcn()
250 		br_send_tcn_bpdu(p);  in br_transmit_tcn()
257 static int br_should_become_designated_port(const struct net_bridge_port *p)  in br_should_become_designated_port()  argument
262 	br = p->br;  in br_should_become_designated_port()
263 	if (br_is_designated_port(p))  in br_should_become_designated_port()
266 	if (memcmp(&p->designated_root, &br->designated_root, 8))  in br_should_become_designated_port()
269 	if (br->root_path_cost < p->designated_cost)  in br_should_become_designated_port()
271 	else if (br->root_path_cost > p->designated_cost)  in br_should_become_designated_port()
274 	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);  in br_should_become_designated_port()
280 	if (p->port_id < p->designated_port)  in br_should_become_designated_port()
289 	struct net_bridge_port *p;  in br_designated_port_selection()  local
291 	list_for_each_entry(p, &br->port_list, list) {  in br_designated_port_selection()
292 		if (p->state != BR_STATE_DISABLED &&  in br_designated_port_selection()
293 		    br_should_become_designated_port(p))  in br_designated_port_selection()
294 			br_become_designated_port(p);  in br_designated_port_selection()
300 static int br_supersedes_port_info(const struct net_bridge_port *p,  in br_supersedes_port_info()  argument
305 	t = memcmp(&bpdu->root, &p->designated_root, 8);  in br_supersedes_port_info()
311 	if (bpdu->root_path_cost < p->designated_cost)  in br_supersedes_port_info()
313 	else if (bpdu->root_path_cost > p->designated_cost)  in br_supersedes_port_info()
316 	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);  in br_supersedes_port_info()
322 	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))  in br_supersedes_port_info()
325 	if (bpdu->port_id <= p->designated_port)  in br_supersedes_port_info()
364 	struct net_bridge_port *p;  in br_config_bpdu_generation()  local
366 	list_for_each_entry(p, &br->port_list, list) {  in br_config_bpdu_generation()
367 		if (p->state != BR_STATE_DISABLED &&  in br_config_bpdu_generation()
368 		    br_is_designated_port(p))  in br_config_bpdu_generation()
369 			br_transmit_config(p);  in br_config_bpdu_generation()
374 static void br_reply(struct net_bridge_port *p)  in br_reply()  argument
376 	br_transmit_config(p);  in br_reply()
387 void br_become_designated_port(struct net_bridge_port *p)  in br_become_designated_port()  argument
391 	br = p->br;  in br_become_designated_port()
392 	p->designated_root = br->designated_root;  in br_become_designated_port()
393 	p->designated_cost = br->root_path_cost;  in br_become_designated_port()
394 	p->designated_bridge = br->bridge_id;  in br_become_designated_port()
395 	p->designated_port = p->port_id;  in br_become_designated_port()
400 static void br_make_blocking(struct net_bridge_port *p)  in br_make_blocking()  argument
402 	if (p->state != BR_STATE_DISABLED &&  in br_make_blocking()
403 	    p->state != BR_STATE_BLOCKING) {  in br_make_blocking()
404 		if (p->state == BR_STATE_FORWARDING ||  in br_make_blocking()
405 		    p->state == BR_STATE_LEARNING)  in br_make_blocking()
406 			br_topology_change_detection(p->br);  in br_make_blocking()
408 		br_set_state(p, BR_STATE_BLOCKING);  in br_make_blocking()
409 		br_log_state(p);  in br_make_blocking()
410 		br_ifinfo_notify(RTM_NEWLINK, p);  in br_make_blocking()
412 		del_timer(&p->forward_delay_timer);  in br_make_blocking()
417 static void br_make_forwarding(struct net_bridge_port *p)  in br_make_forwarding()  argument
419 	struct net_bridge *br = p->br;  in br_make_forwarding()
421 	if (p->state != BR_STATE_BLOCKING)  in br_make_forwarding()
425 		br_set_state(p, BR_STATE_FORWARDING);  in br_make_forwarding()
427 		del_timer(&p->forward_delay_timer);  in br_make_forwarding()
429 		br_set_state(p, BR_STATE_LISTENING);  in br_make_forwarding()
431 		br_set_state(p, BR_STATE_LEARNING);  in br_make_forwarding()
433 	br_log_state(p);  in br_make_forwarding()
434 	br_ifinfo_notify(RTM_NEWLINK, p);  in br_make_forwarding()
437 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_make_forwarding()
443 	struct net_bridge_port *p;  in br_port_state_selection()  local
446 	list_for_each_entry(p, &br->port_list, list) {  in br_port_state_selection()
447 		if (p->state == BR_STATE_DISABLED)  in br_port_state_selection()
452 			if (p->port_no == br->root_port) {  in br_port_state_selection()
453 				p->config_pending = 0;  in br_port_state_selection()
454 				p->topology_change_ack = 0;  in br_port_state_selection()
455 				br_make_forwarding(p);  in br_port_state_selection()
456 			} else if (br_is_designated_port(p)) {  in br_port_state_selection()
457 				del_timer(&p->message_age_timer);  in br_port_state_selection()
458 				br_make_forwarding(p);  in br_port_state_selection()
460 				p->config_pending = 0;  in br_port_state_selection()
461 				p->topology_change_ack = 0;  in br_port_state_selection()
462 				br_make_blocking(p);  in br_port_state_selection()
466 		if (p->state != BR_STATE_BLOCKING)  in br_port_state_selection()
467 			br_multicast_enable_port(p);  in br_port_state_selection()
472 		if (p->state == BR_STATE_FORWARDING)  in br_port_state_selection()
483 static void br_topology_change_acknowledge(struct net_bridge_port *p)  in br_topology_change_acknowledge()  argument
485 	p->topology_change_ack = 1;  in br_topology_change_acknowledge()
486 	br_transmit_config(p);  in br_topology_change_acknowledge()
490 void br_received_config_bpdu(struct net_bridge_port *p,  in br_received_config_bpdu()  argument
496 	br = p->br;  in br_received_config_bpdu()
499 	if (br_supersedes_port_info(p, bpdu)) {  in br_received_config_bpdu()
500 		br_record_config_information(p, bpdu);  in br_received_config_bpdu()
515 		if (p->port_no == br->root_port) {  in br_received_config_bpdu()
521 	} else if (br_is_designated_port(p)) {  in br_received_config_bpdu()
522 		br_reply(p);  in br_received_config_bpdu()
527 void br_received_tcn_bpdu(struct net_bridge_port *p)  in br_received_tcn_bpdu()  argument
529 	if (br_is_designated_port(p)) {  in br_received_tcn_bpdu()
530 		br_info(p->br, "port %u(%s) received tcn bpdu\n",  in br_received_tcn_bpdu()
531 			(unsigned int) p->port_no, p->dev->name);  in br_received_tcn_bpdu()
533 		br_topology_change_detection(p->br);  in br_received_tcn_bpdu()
534 		br_topology_change_acknowledge(p);  in br_received_tcn_bpdu()