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 	if (br_opt_get(p->br, BROPT_MST_ENABLED)) {  in br_set_state()
47 		err = br_mst_set_state(p, 0, state, NULL);  in br_set_state()
49 			br_warn(p->br, "error setting MST state on port %u(%s)\n",  in br_set_state()
50 				p->port_no, netdev_name(p->dev));  in br_set_state()
52 	err = switchdev_port_attr_set(p->dev, &attr, NULL);  in br_set_state()
54 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",  in br_set_state()
55 				(unsigned int) p->port_no, p->dev->name);  in br_set_state()
57 		br_info(p->br, "port %u(%s) entered %s state\n",  in br_set_state()
58 				(unsigned int) p->port_no, p->dev->name,  in br_set_state()
59 				br_port_state_names[p->state]);  in br_set_state()
61 	if (p->br->stp_enabled == BR_KERNEL_STP) {  in br_set_state()
62 		switch (p->state) {  in br_set_state()
64 			p->stp_xstats.transition_blk++;  in br_set_state()
67 			p->stp_xstats.transition_fwd++;  in br_set_state()
75 	struct net_bridge_port *p;  in br_port_get_stp_state()  local
79 	p = br_port_get_rtnl(dev);  in br_port_get_stp_state()
80 	if (!p)  in br_port_get_stp_state()
83 	return p->state;  in br_port_get_stp_state()
90 	struct net_bridge_port *p;  in br_get_port()  local
92 	list_for_each_entry_rcu(p, &br->port_list, list,  in br_get_port()
94 		if (p->port_no == port_no)  in br_get_port()
95 			return p;  in br_get_port()
102 static int br_should_become_root_port(const struct net_bridge_port *p,  in br_should_become_root_port()  argument
109 	br = p->br;  in br_should_become_root_port()
110 	if (p->state == BR_STATE_DISABLED ||  in br_should_become_root_port()
111 	    br_is_designated_port(p))  in br_should_become_root_port()
114 	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)  in br_should_become_root_port()
122 	t = memcmp(&p->designated_root, &rp->designated_root, 8);  in br_should_become_root_port()
128 	if (p->designated_cost + p->path_cost <  in br_should_become_root_port()
131 	else if (p->designated_cost + p->path_cost >  in br_should_become_root_port()
135 	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);  in br_should_become_root_port()
141 	if (p->designated_port < rp->designated_port)  in br_should_become_root_port()
143 	else if (p->designated_port > rp->designated_port)  in br_should_become_root_port()
146 	if (p->port_id < rp->port_id)  in br_should_become_root_port()
153 			       struct net_bridge_port *p)  in br_root_port_block()  argument
157 		  (unsigned int) p->port_no, p->dev->name);  in br_root_port_block()
159 	br_set_state(p, BR_STATE_LISTENING);  in br_root_port_block()
160 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_root_port_block()
163 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_root_port_block()
169 	struct net_bridge_port *p;  in br_root_selection()  local
172 	list_for_each_entry(p, &br->port_list, list) {  in br_root_selection()
173 		if (!br_should_become_root_port(p, root_port))  in br_root_selection()
176 		if (p->flags & BR_ROOT_BLOCK)  in br_root_selection()
177 			br_root_port_block(br, p);  in br_root_selection()
179 			root_port = p->port_no;  in br_root_selection()
188 		p = br_get_port(br, root_port);  in br_root_selection()
189 		br->designated_root = p->designated_root;  in br_root_selection()
190 		br->root_path_cost = p->designated_cost + p->path_cost;  in br_root_selection()
210 void br_transmit_config(struct net_bridge_port *p)  in br_transmit_config()  argument
215 	if (timer_pending(&p->hold_timer)) {  in br_transmit_config()
216 		p->config_pending = 1;  in br_transmit_config()
220 	br = p->br;  in br_transmit_config()
223 	bpdu.topology_change_ack = p->topology_change_ack;  in br_transmit_config()
227 	bpdu.port_id = p->port_id;  in br_transmit_config()
241 		br_send_config_bpdu(p, &bpdu);  in br_transmit_config()
242 		p->topology_change_ack = 0;  in br_transmit_config()
243 		p->config_pending = 0;  in br_transmit_config()
244 		if (p->br->stp_enabled == BR_KERNEL_STP)  in br_transmit_config()
245 			mod_timer(&p->hold_timer,  in br_transmit_config()
251 static void br_record_config_information(struct net_bridge_port *p,  in br_record_config_information()  argument
254 	p->designated_root = bpdu->root;  in br_record_config_information()
255 	p->designated_cost = bpdu->root_path_cost;  in br_record_config_information()
256 	p->designated_bridge = bpdu->bridge_id;  in br_record_config_information()
257 	p->designated_port = bpdu->port_id;  in br_record_config_information()
258 	p->designated_age = jiffies - bpdu->message_age;  in br_record_config_information()
260 	mod_timer(&p->message_age_timer, jiffies  in br_record_config_information()
277 	struct net_bridge_port *p;  in br_transmit_tcn()  local
279 	p = br_get_port(br, br->root_port);  in br_transmit_tcn()
280 	if (p)  in br_transmit_tcn()
281 		br_send_tcn_bpdu(p);  in br_transmit_tcn()
288 static int br_should_become_designated_port(const struct net_bridge_port *p)  in br_should_become_designated_port()  argument
293 	br = p->br;  in br_should_become_designated_port()
294 	if (br_is_designated_port(p))  in br_should_become_designated_port()
297 	if (memcmp(&p->designated_root, &br->designated_root, 8))  in br_should_become_designated_port()
300 	if (br->root_path_cost < p->designated_cost)  in br_should_become_designated_port()
302 	else if (br->root_path_cost > p->designated_cost)  in br_should_become_designated_port()
305 	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);  in br_should_become_designated_port()
311 	if (p->port_id < p->designated_port)  in br_should_become_designated_port()
320 	struct net_bridge_port *p;  in br_designated_port_selection()  local
322 	list_for_each_entry(p, &br->port_list, list) {  in br_designated_port_selection()
323 		if (p->state != BR_STATE_DISABLED &&  in br_designated_port_selection()
324 		    br_should_become_designated_port(p))  in br_designated_port_selection()
325 			br_become_designated_port(p);  in br_designated_port_selection()
331 static int br_supersedes_port_info(const struct net_bridge_port *p,  in br_supersedes_port_info()  argument
336 	t = memcmp(&bpdu->root, &p->designated_root, 8);  in br_supersedes_port_info()
342 	if (bpdu->root_path_cost < p->designated_cost)  in br_supersedes_port_info()
344 	else if (bpdu->root_path_cost > p->designated_cost)  in br_supersedes_port_info()
347 	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);  in br_supersedes_port_info()
353 	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))  in br_supersedes_port_info()
356 	if (bpdu->port_id <= p->designated_port)  in br_supersedes_port_info()
395 	struct net_bridge_port *p;  in br_config_bpdu_generation()  local
397 	list_for_each_entry(p, &br->port_list, list) {  in br_config_bpdu_generation()
398 		if (p->state != BR_STATE_DISABLED &&  in br_config_bpdu_generation()
399 		    br_is_designated_port(p))  in br_config_bpdu_generation()
400 			br_transmit_config(p);  in br_config_bpdu_generation()
405 static void br_reply(struct net_bridge_port *p)  in br_reply()  argument
407 	br_transmit_config(p);  in br_reply()
418 void br_become_designated_port(struct net_bridge_port *p)  in br_become_designated_port()  argument
422 	br = p->br;  in br_become_designated_port()
423 	p->designated_root = br->designated_root;  in br_become_designated_port()
424 	p->designated_cost = br->root_path_cost;  in br_become_designated_port()
425 	p->designated_bridge = br->bridge_id;  in br_become_designated_port()
426 	p->designated_port = p->port_id;  in br_become_designated_port()
431 static void br_make_blocking(struct net_bridge_port *p)  in br_make_blocking()  argument
433 	if (p->state != BR_STATE_DISABLED &&  in br_make_blocking()
434 	    p->state != BR_STATE_BLOCKING) {  in br_make_blocking()
435 		if (p->state == BR_STATE_FORWARDING ||  in br_make_blocking()
436 		    p->state == BR_STATE_LEARNING)  in br_make_blocking()
437 			br_topology_change_detection(p->br);  in br_make_blocking()
439 		br_set_state(p, BR_STATE_BLOCKING);  in br_make_blocking()
440 		br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_blocking()
442 		del_timer(&p->forward_delay_timer);  in br_make_blocking()
447 static void br_make_forwarding(struct net_bridge_port *p)  in br_make_forwarding()  argument
449 	struct net_bridge *br = p->br;  in br_make_forwarding()
451 	if (p->state != BR_STATE_BLOCKING)  in br_make_forwarding()
455 		br_set_state(p, BR_STATE_FORWARDING);  in br_make_forwarding()
457 		del_timer(&p->forward_delay_timer);  in br_make_forwarding()
459 		br_set_state(p, BR_STATE_LISTENING);  in br_make_forwarding()
461 		br_set_state(p, BR_STATE_LEARNING);  in br_make_forwarding()
463 	br_ifinfo_notify(RTM_NEWLINK, NULL, p);  in br_make_forwarding()
466 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_make_forwarding()
472 	struct net_bridge_port *p;  in br_port_state_selection()  local
475 	list_for_each_entry(p, &br->port_list, list) {  in br_port_state_selection()
476 		if (p->state == BR_STATE_DISABLED)  in br_port_state_selection()
481 			if (p->port_no == br->root_port) {  in br_port_state_selection()
482 				p->config_pending = 0;  in br_port_state_selection()
483 				p->topology_change_ack = 0;  in br_port_state_selection()
484 				br_make_forwarding(p);  in br_port_state_selection()
485 			} else if (br_is_designated_port(p)) {  in br_port_state_selection()
486 				del_timer(&p->message_age_timer);  in br_port_state_selection()
487 				br_make_forwarding(p);  in br_port_state_selection()
489 				p->config_pending = 0;  in br_port_state_selection()
490 				p->topology_change_ack = 0;  in br_port_state_selection()
491 				br_make_blocking(p);  in br_port_state_selection()
495 		if (p->state != BR_STATE_BLOCKING)  in br_port_state_selection()
496 			br_multicast_enable_port(p);  in br_port_state_selection()
501 		if (p->state == BR_STATE_FORWARDING)  in br_port_state_selection()
512 static void br_topology_change_acknowledge(struct net_bridge_port *p)  in br_topology_change_acknowledge()  argument
514 	p->topology_change_ack = 1;  in br_topology_change_acknowledge()
515 	br_transmit_config(p);  in br_topology_change_acknowledge()
519 void br_received_config_bpdu(struct net_bridge_port *p,  in br_received_config_bpdu()  argument
525 	p->stp_xstats.rx_bpdu++;  in br_received_config_bpdu()
527 	br = p->br;  in br_received_config_bpdu()
530 	if (br_supersedes_port_info(p, bpdu)) {  in br_received_config_bpdu()
531 		br_record_config_information(p, bpdu);  in br_received_config_bpdu()
546 		if (p->port_no == br->root_port) {  in br_received_config_bpdu()
552 	} else if (br_is_designated_port(p)) {  in br_received_config_bpdu()
553 		br_reply(p);  in br_received_config_bpdu()
558 void br_received_tcn_bpdu(struct net_bridge_port *p)  in br_received_tcn_bpdu()  argument
560 	p->stp_xstats.rx_tcn++;  in br_received_tcn_bpdu()
562 	if (br_is_designated_port(p)) {  in br_received_tcn_bpdu()
563 		br_info(p->br, "port %u(%s) received tcn bpdu\n",  in br_received_tcn_bpdu()
564 			(unsigned int) p->port_no, p->dev->name);  in br_received_tcn_bpdu()
566 		br_topology_change_detection(p->br);  in br_received_tcn_bpdu()
567 		br_topology_change_acknowledge(p);  in br_received_tcn_bpdu()