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()
39 	p->state = state;  in br_set_state()
40 	err = switchdev_port_attr_set(p->dev, &attr);  in br_set_state()
42 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",  in br_set_state()
43 				(unsigned int) p->port_no, p->dev->name);  in br_set_state()
45 		br_info(p->br, "port %u(%s) entered %s state\n",  in br_set_state()
46 				(unsigned int) p->port_no, p->dev->name,  in br_set_state()
47 				br_port_state_names[p->state]);  in br_set_state()
53 	struct net_bridge_port *p;  in br_get_port()  local
55 	list_for_each_entry_rcu(p, &br->port_list, list) {  in br_get_port()
56 		if (p->port_no == port_no)  in br_get_port()
57 			return p;  in br_get_port()
64 static int br_should_become_root_port(const struct net_bridge_port *p,  in br_should_become_root_port()  argument
71 	br = p->br;  in br_should_become_root_port()
72 	if (p->state == BR_STATE_DISABLED ||  in br_should_become_root_port()
73 	    br_is_designated_port(p))  in br_should_become_root_port()
76 	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)  in br_should_become_root_port()
84 	t = memcmp(&p->designated_root, &rp->designated_root, 8);  in br_should_become_root_port()
90 	if (p->designated_cost + p->path_cost <  in br_should_become_root_port()
93 	else if (p->designated_cost + p->path_cost >  in br_should_become_root_port()
97 	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);  in br_should_become_root_port()
103 	if (p->designated_port < rp->designated_port)  in br_should_become_root_port()
105 	else if (p->designated_port > rp->designated_port)  in br_should_become_root_port()
108 	if (p->port_id < rp->port_id)  in br_should_become_root_port()
115 			       struct net_bridge_port *p)  in br_root_port_block()  argument
119 		  (unsigned int) p->port_no, p->dev->name);  in br_root_port_block()
121 	br_set_state(p, BR_STATE_LISTENING);  in br_root_port_block()
122 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_root_port_block()
125 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_root_port_block()
131 	struct net_bridge_port *p;  in br_root_selection()  local
134 	list_for_each_entry(p, &br->port_list, list) {  in br_root_selection()
135 		if (!br_should_become_root_port(p, root_port))  in br_root_selection()
138 		if (p->flags & BR_ROOT_BLOCK)  in br_root_selection()
139 			br_root_port_block(br, p);  in br_root_selection()
141 			root_port = p->port_no;  in br_root_selection()
150 		p = br_get_port(br, root_port);  in br_root_selection()
151 		br->designated_root = p->designated_root;  in br_root_selection()
152 		br->root_path_cost = p->designated_cost + p->path_cost;  in br_root_selection()
172 void br_transmit_config(struct net_bridge_port *p)  in br_transmit_config()  argument
177 	if (timer_pending(&p->hold_timer)) {  in br_transmit_config()
178 		p->config_pending = 1;  in br_transmit_config()
182 	br = p->br;  in br_transmit_config()
185 	bpdu.topology_change_ack = p->topology_change_ack;  in br_transmit_config()
189 	bpdu.port_id = p->port_id;  in br_transmit_config()
203 		br_send_config_bpdu(p, &bpdu);  in br_transmit_config()
204 		p->topology_change_ack = 0;  in br_transmit_config()
205 		p->config_pending = 0;  in br_transmit_config()
206 		if (p->br->stp_enabled == BR_KERNEL_STP)  in br_transmit_config()
207 			mod_timer(&p->hold_timer,  in br_transmit_config()
213 static void br_record_config_information(struct net_bridge_port *p,  in br_record_config_information()  argument
216 	p->designated_root = bpdu->root;  in br_record_config_information()
217 	p->designated_cost = bpdu->root_path_cost;  in br_record_config_information()
218 	p->designated_bridge = bpdu->bridge_id;  in br_record_config_information()
219 	p->designated_port = bpdu->port_id;  in br_record_config_information()
220 	p->designated_age = jiffies - bpdu->message_age;  in br_record_config_information()
222 	mod_timer(&p->message_age_timer, jiffies  in br_record_config_information()
239 	struct net_bridge_port *p;  in br_transmit_tcn()  local
241 	p = br_get_port(br, br->root_port);  in br_transmit_tcn()
242 	if (p)  in br_transmit_tcn()
243 		br_send_tcn_bpdu(p);  in br_transmit_tcn()
250 static int br_should_become_designated_port(const struct net_bridge_port *p)  in br_should_become_designated_port()  argument
255 	br = p->br;  in br_should_become_designated_port()
256 	if (br_is_designated_port(p))  in br_should_become_designated_port()
259 	if (memcmp(&p->designated_root, &br->designated_root, 8))  in br_should_become_designated_port()
262 	if (br->root_path_cost < p->designated_cost)  in br_should_become_designated_port()
264 	else if (br->root_path_cost > p->designated_cost)  in br_should_become_designated_port()
267 	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);  in br_should_become_designated_port()
273 	if (p->port_id < p->designated_port)  in br_should_become_designated_port()
282 	struct net_bridge_port *p;  in br_designated_port_selection()  local
284 	list_for_each_entry(p, &br->port_list, list) {  in br_designated_port_selection()
285 		if (p->state != BR_STATE_DISABLED &&  in br_designated_port_selection()
286 		    br_should_become_designated_port(p))  in br_designated_port_selection()
287 			br_become_designated_port(p);  in br_designated_port_selection()
293 static int br_supersedes_port_info(const struct net_bridge_port *p,  in br_supersedes_port_info()  argument
298 	t = memcmp(&bpdu->root, &p->designated_root, 8);  in br_supersedes_port_info()
304 	if (bpdu->root_path_cost < p->designated_cost)  in br_supersedes_port_info()
306 	else if (bpdu->root_path_cost > p->designated_cost)  in br_supersedes_port_info()
309 	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);  in br_supersedes_port_info()
315 	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))  in br_supersedes_port_info()
318 	if (bpdu->port_id <= p->designated_port)  in br_supersedes_port_info()
357 	struct net_bridge_port *p;  in br_config_bpdu_generation()  local
359 	list_for_each_entry(p, &br->port_list, list) {  in br_config_bpdu_generation()
360 		if (p->state != BR_STATE_DISABLED &&  in br_config_bpdu_generation()
361 		    br_is_designated_port(p))  in br_config_bpdu_generation()
362 			br_transmit_config(p);  in br_config_bpdu_generation()
367 static void br_reply(struct net_bridge_port *p)  in br_reply()  argument
369 	br_transmit_config(p);  in br_reply()
380 void br_become_designated_port(struct net_bridge_port *p)  in br_become_designated_port()  argument
384 	br = p->br;  in br_become_designated_port()
385 	p->designated_root = br->designated_root;  in br_become_designated_port()
386 	p->designated_cost = br->root_path_cost;  in br_become_designated_port()
387 	p->designated_bridge = br->bridge_id;  in br_become_designated_port()
388 	p->designated_port = p->port_id;  in br_become_designated_port()
393 static void br_make_blocking(struct net_bridge_port *p)  in br_make_blocking()  argument
395 	if (p->state != BR_STATE_DISABLED &&  in br_make_blocking()
396 	    p->state != BR_STATE_BLOCKING) {  in br_make_blocking()
397 		if (p->state == BR_STATE_FORWARDING ||  in br_make_blocking()
398 		    p->state == BR_STATE_LEARNING)  in br_make_blocking()
399 			br_topology_change_detection(p->br);  in br_make_blocking()
401 		br_set_state(p, BR_STATE_BLOCKING);  in br_make_blocking()
402 		br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_blocking()
404 		del_timer(&p->forward_delay_timer);  in br_make_blocking()
409 static void br_make_forwarding(struct net_bridge_port *p)  in br_make_forwarding()  argument
411 	struct net_bridge *br = p->br;  in br_make_forwarding()
413 	if (p->state != BR_STATE_BLOCKING)  in br_make_forwarding()
417 		br_set_state(p, BR_STATE_FORWARDING);  in br_make_forwarding()
419 		del_timer(&p->forward_delay_timer);  in br_make_forwarding()
421 		br_set_state(p, BR_STATE_LISTENING);  in br_make_forwarding()
423 		br_set_state(p, BR_STATE_LEARNING);  in br_make_forwarding()
425 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_forwarding()
428 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_make_forwarding()
434 	struct net_bridge_port *p;  in br_port_state_selection()  local
437 	list_for_each_entry(p, &br->port_list, list) {  in br_port_state_selection()
438 		if (p->state == BR_STATE_DISABLED)  in br_port_state_selection()
443 			if (p->port_no == br->root_port) {  in br_port_state_selection()
444 				p->config_pending = 0;  in br_port_state_selection()
445 				p->topology_change_ack = 0;  in br_port_state_selection()
446 				br_make_forwarding(p);  in br_port_state_selection()
447 			} else if (br_is_designated_port(p)) {  in br_port_state_selection()
448 				del_timer(&p->message_age_timer);  in br_port_state_selection()
449 				br_make_forwarding(p);  in br_port_state_selection()
451 				p->config_pending = 0;  in br_port_state_selection()
452 				p->topology_change_ack = 0;  in br_port_state_selection()
453 				br_make_blocking(p);  in br_port_state_selection()
457 		if (p->state != BR_STATE_BLOCKING)  in br_port_state_selection()
458 			br_multicast_enable_port(p);  in br_port_state_selection()
463 		if (p->state == BR_STATE_FORWARDING)  in br_port_state_selection()
474 static void br_topology_change_acknowledge(struct net_bridge_port *p)  in br_topology_change_acknowledge()  argument
476 	p->topology_change_ack = 1;  in br_topology_change_acknowledge()
477 	br_transmit_config(p);  in br_topology_change_acknowledge()
481 void br_received_config_bpdu(struct net_bridge_port *p,  in br_received_config_bpdu()  argument
487 	br = p->br;  in br_received_config_bpdu()
490 	if (br_supersedes_port_info(p, bpdu)) {  in br_received_config_bpdu()
491 		br_record_config_information(p, bpdu);  in br_received_config_bpdu()
506 		if (p->port_no == br->root_port) {  in br_received_config_bpdu()
512 	} else if (br_is_designated_port(p)) {  in br_received_config_bpdu()
513 		br_reply(p);  in br_received_config_bpdu()
518 void br_received_tcn_bpdu(struct net_bridge_port *p)  in br_received_tcn_bpdu()  argument
520 	if (br_is_designated_port(p)) {  in br_received_tcn_bpdu()
521 		br_info(p->br, "port %u(%s) received tcn bpdu\n",  in br_received_tcn_bpdu()
522 			(unsigned int) p->port_no, p->dev->name);  in br_received_tcn_bpdu()
524 		br_topology_change_detection(p->br);  in br_received_tcn_bpdu()
525 		br_topology_change_acknowledge(p);  in br_received_tcn_bpdu()