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
44 	p->state = state;  in br_set_state()
45 	err = netdev_switch_port_stp_update(p->dev, state);  in br_set_state()
47 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",  in br_set_state()
48 				(unsigned int) p->port_no, p->dev->name);  in br_set_state()
54 	struct net_bridge_port *p;  in br_get_port()  local
56 	list_for_each_entry_rcu(p, &br->port_list, list) {  in br_get_port()
57 		if (p->port_no == port_no)  in br_get_port()
58 			return p;  in br_get_port()
65 static int br_should_become_root_port(const struct net_bridge_port *p,  in br_should_become_root_port()  argument
72 	br = p->br;  in br_should_become_root_port()
73 	if (p->state == BR_STATE_DISABLED ||  in br_should_become_root_port()
74 	    br_is_designated_port(p))  in br_should_become_root_port()
77 	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)  in br_should_become_root_port()
85 	t = memcmp(&p->designated_root, &rp->designated_root, 8);  in br_should_become_root_port()
91 	if (p->designated_cost + p->path_cost <  in br_should_become_root_port()
94 	else if (p->designated_cost + p->path_cost >  in br_should_become_root_port()
98 	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);  in br_should_become_root_port()
104 	if (p->designated_port < rp->designated_port)  in br_should_become_root_port()
106 	else if (p->designated_port > rp->designated_port)  in br_should_become_root_port()
109 	if (p->port_id < rp->port_id)  in br_should_become_root_port()
116 			       struct net_bridge_port *p)  in br_root_port_block()  argument
120 		  (unsigned int) p->port_no, p->dev->name);  in br_root_port_block()
122 	br_set_state(p, BR_STATE_LISTENING);  in br_root_port_block()
123 	br_log_state(p);  in br_root_port_block()
124 	br_ifinfo_notify(RTM_NEWLINK, p);  in br_root_port_block()
127 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_root_port_block()
133 	struct net_bridge_port *p;  in br_root_selection()  local
136 	list_for_each_entry(p, &br->port_list, list) {  in br_root_selection()
137 		if (!br_should_become_root_port(p, root_port))  in br_root_selection()
140 		if (p->flags & BR_ROOT_BLOCK)  in br_root_selection()
141 			br_root_port_block(br, p);  in br_root_selection()
143 			root_port = p->port_no;  in br_root_selection()
152 		p = br_get_port(br, root_port);  in br_root_selection()
153 		br->designated_root = p->designated_root;  in br_root_selection()
154 		br->root_path_cost = p->designated_cost + p->path_cost;  in br_root_selection()
174 void br_transmit_config(struct net_bridge_port *p)  in br_transmit_config()  argument
179 	if (timer_pending(&p->hold_timer)) {  in br_transmit_config()
180 		p->config_pending = 1;  in br_transmit_config()
184 	br = p->br;  in br_transmit_config()
187 	bpdu.topology_change_ack = p->topology_change_ack;  in br_transmit_config()
191 	bpdu.port_id = p->port_id;  in br_transmit_config()
205 		br_send_config_bpdu(p, &bpdu);  in br_transmit_config()
206 		p->topology_change_ack = 0;  in br_transmit_config()
207 		p->config_pending = 0;  in br_transmit_config()
208 		mod_timer(&p->hold_timer,  in br_transmit_config()
214 static void br_record_config_information(struct net_bridge_port *p,  in br_record_config_information()  argument
217 	p->designated_root = bpdu->root;  in br_record_config_information()
218 	p->designated_cost = bpdu->root_path_cost;  in br_record_config_information()
219 	p->designated_bridge = bpdu->bridge_id;  in br_record_config_information()
220 	p->designated_port = bpdu->port_id;  in br_record_config_information()
221 	p->designated_age = jiffies - bpdu->message_age;  in br_record_config_information()
223 	mod_timer(&p->message_age_timer, jiffies  in br_record_config_information()
240 	struct net_bridge_port *p;  in br_transmit_tcn()  local
242 	p = br_get_port(br, br->root_port);  in br_transmit_tcn()
243 	if (p)  in br_transmit_tcn()
244 		br_send_tcn_bpdu(p);  in br_transmit_tcn()
251 static int br_should_become_designated_port(const struct net_bridge_port *p)  in br_should_become_designated_port()  argument
256 	br = p->br;  in br_should_become_designated_port()
257 	if (br_is_designated_port(p))  in br_should_become_designated_port()
260 	if (memcmp(&p->designated_root, &br->designated_root, 8))  in br_should_become_designated_port()
263 	if (br->root_path_cost < p->designated_cost)  in br_should_become_designated_port()
265 	else if (br->root_path_cost > p->designated_cost)  in br_should_become_designated_port()
268 	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);  in br_should_become_designated_port()
274 	if (p->port_id < p->designated_port)  in br_should_become_designated_port()
283 	struct net_bridge_port *p;  in br_designated_port_selection()  local
285 	list_for_each_entry(p, &br->port_list, list) {  in br_designated_port_selection()
286 		if (p->state != BR_STATE_DISABLED &&  in br_designated_port_selection()
287 		    br_should_become_designated_port(p))  in br_designated_port_selection()
288 			br_become_designated_port(p);  in br_designated_port_selection()
294 static int br_supersedes_port_info(const struct net_bridge_port *p,  in br_supersedes_port_info()  argument
299 	t = memcmp(&bpdu->root, &p->designated_root, 8);  in br_supersedes_port_info()
305 	if (bpdu->root_path_cost < p->designated_cost)  in br_supersedes_port_info()
307 	else if (bpdu->root_path_cost > p->designated_cost)  in br_supersedes_port_info()
310 	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);  in br_supersedes_port_info()
316 	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))  in br_supersedes_port_info()
319 	if (bpdu->port_id <= p->designated_port)  in br_supersedes_port_info()
358 	struct net_bridge_port *p;  in br_config_bpdu_generation()  local
360 	list_for_each_entry(p, &br->port_list, list) {  in br_config_bpdu_generation()
361 		if (p->state != BR_STATE_DISABLED &&  in br_config_bpdu_generation()
362 		    br_is_designated_port(p))  in br_config_bpdu_generation()
363 			br_transmit_config(p);  in br_config_bpdu_generation()
368 static void br_reply(struct net_bridge_port *p)  in br_reply()  argument
370 	br_transmit_config(p);  in br_reply()
381 void br_become_designated_port(struct net_bridge_port *p)  in br_become_designated_port()  argument
385 	br = p->br;  in br_become_designated_port()
386 	p->designated_root = br->designated_root;  in br_become_designated_port()
387 	p->designated_cost = br->root_path_cost;  in br_become_designated_port()
388 	p->designated_bridge = br->bridge_id;  in br_become_designated_port()
389 	p->designated_port = p->port_id;  in br_become_designated_port()
394 static void br_make_blocking(struct net_bridge_port *p)  in br_make_blocking()  argument
396 	if (p->state != BR_STATE_DISABLED &&  in br_make_blocking()
397 	    p->state != BR_STATE_BLOCKING) {  in br_make_blocking()
398 		if (p->state == BR_STATE_FORWARDING ||  in br_make_blocking()
399 		    p->state == BR_STATE_LEARNING)  in br_make_blocking()
400 			br_topology_change_detection(p->br);  in br_make_blocking()
402 		br_set_state(p, BR_STATE_BLOCKING);  in br_make_blocking()
403 		br_log_state(p);  in br_make_blocking()
404 		br_ifinfo_notify(RTM_NEWLINK, p);  in br_make_blocking()
406 		del_timer(&p->forward_delay_timer);  in br_make_blocking()
411 static void br_make_forwarding(struct net_bridge_port *p)  in br_make_forwarding()  argument
413 	struct net_bridge *br = p->br;  in br_make_forwarding()
415 	if (p->state != BR_STATE_BLOCKING)  in br_make_forwarding()
419 		br_set_state(p, BR_STATE_FORWARDING);  in br_make_forwarding()
421 		del_timer(&p->forward_delay_timer);  in br_make_forwarding()
423 		br_set_state(p, BR_STATE_LISTENING);  in br_make_forwarding()
425 		br_set_state(p, BR_STATE_LEARNING);  in br_make_forwarding()
427 	br_multicast_enable_port(p);  in br_make_forwarding()
428 	br_log_state(p);  in br_make_forwarding()
429 	br_ifinfo_notify(RTM_NEWLINK, p);  in br_make_forwarding()
432 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);  in br_make_forwarding()
438 	struct net_bridge_port *p;  in br_port_state_selection()  local
441 	list_for_each_entry(p, &br->port_list, list) {  in br_port_state_selection()
442 		if (p->state == BR_STATE_DISABLED)  in br_port_state_selection()
447 			if (p->port_no == br->root_port) {  in br_port_state_selection()
448 				p->config_pending = 0;  in br_port_state_selection()
449 				p->topology_change_ack = 0;  in br_port_state_selection()
450 				br_make_forwarding(p);  in br_port_state_selection()
451 			} else if (br_is_designated_port(p)) {  in br_port_state_selection()
452 				del_timer(&p->message_age_timer);  in br_port_state_selection()
453 				br_make_forwarding(p);  in br_port_state_selection()
455 				p->config_pending = 0;  in br_port_state_selection()
456 				p->topology_change_ack = 0;  in br_port_state_selection()
457 				br_make_blocking(p);  in br_port_state_selection()
461 		if (p->state == BR_STATE_FORWARDING)  in br_port_state_selection()
472 static void br_topology_change_acknowledge(struct net_bridge_port *p)  in br_topology_change_acknowledge()  argument
474 	p->topology_change_ack = 1;  in br_topology_change_acknowledge()
475 	br_transmit_config(p);  in br_topology_change_acknowledge()
479 void br_received_config_bpdu(struct net_bridge_port *p,  in br_received_config_bpdu()  argument
485 	br = p->br;  in br_received_config_bpdu()
488 	if (br_supersedes_port_info(p, bpdu)) {  in br_received_config_bpdu()
489 		br_record_config_information(p, bpdu);  in br_received_config_bpdu()
504 		if (p->port_no == br->root_port) {  in br_received_config_bpdu()
510 	} else if (br_is_designated_port(p)) {  in br_received_config_bpdu()
511 		br_reply(p);  in br_received_config_bpdu()
516 void br_received_tcn_bpdu(struct net_bridge_port *p)  in br_received_tcn_bpdu()  argument
518 	if (br_is_designated_port(p)) {  in br_received_tcn_bpdu()
519 		br_info(p->br, "port %u(%s) received tcn bpdu\n",  in br_received_tcn_bpdu()
520 			(unsigned int) p->port_no, p->dev->name);  in br_received_tcn_bpdu()
522 		br_topology_change_detection(p->br);  in br_received_tcn_bpdu()
523 		br_topology_change_acknowledge(p);  in br_received_tcn_bpdu()