2 * Copyright (c) 2011-2014 M3S, Srl - Italy
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * Rapid Spanning Tree Protocol (IEEE 802.1D-2004) public interface.
21 * Martino Fornasa <mf@fornasa.it>
22 * Daniele Venturino <daniele.venturino@m3s.it>
24 * References to IEEE 802.1D-2004 standard are enclosed in square brackets.
25 * E.g. [17.3], [Table 17-1], etc.
32 #include "rstp-common.h"
33 #include "rstp-state-machines.h"
34 #include <arpa/inet.h>
36 #include <netinet/in.h>
38 #include <sys/types.h>
39 #include "byte-order.h"
40 #include "connectivity.h"
42 #include "ofproto/ofproto.h"
49 VLOG_DEFINE_THIS_MODULE(rstp
);
51 struct ovs_mutex rstp_mutex
= OVS_MUTEX_INITIALIZER
;
53 static struct list all_rstps__
= LIST_INITIALIZER(&all_rstps__
);
54 static struct list
*const all_rstps
OVS_GUARDED_BY(rstp_mutex
) = &all_rstps__
;
56 /* Internal use only. */
57 static void rstp_set_bridge_address__(struct rstp
*, rstp_identifier
)
58 OVS_REQUIRES(rstp_mutex
);
59 static void rstp_set_bridge_priority__(struct rstp
*, int new_priority
)
60 OVS_REQUIRES(rstp_mutex
);
61 static void rstp_set_bridge_ageing_time__(struct rstp
*, int new_ageing_time
)
62 OVS_REQUIRES(rstp_mutex
);
63 static void rstp_set_bridge_force_protocol_version__(struct rstp
*,
64 enum rstp_force_protocol_version
)
65 OVS_REQUIRES(rstp_mutex
);
66 static void rstp_set_bridge_hello_time__(struct rstp
*)
67 OVS_REQUIRES(rstp_mutex
);
68 static void rstp_set_bridge_max_age__(struct rstp
*, int new_max_age
)
69 OVS_REQUIRES(rstp_mutex
);
70 static void rstp_set_bridge_forward_delay__(struct rstp
*, int new_forward_delay
)
71 OVS_REQUIRES(rstp_mutex
);
72 static void rstp_set_bridge_transmit_hold_count__(struct rstp
*,
73 int new_transmit_hold_count
)
74 OVS_REQUIRES(rstp_mutex
);
75 static void rstp_set_bridge_migrate_time__(struct rstp
*)
76 OVS_REQUIRES(rstp_mutex
);
77 static void rstp_set_bridge_times__(struct rstp
*, int new_forward_delay
,
78 int new_hello_time
, int new_max_age
,
80 OVS_REQUIRES(rstp_mutex
);
82 static struct rstp_port
*rstp_get_port__(struct rstp
*rstp
,
84 OVS_REQUIRES(rstp_mutex
);
85 static void set_port_id__(struct rstp_port
*)
86 OVS_REQUIRES(rstp_mutex
);
87 static void update_port_enabled__(struct rstp_port
*)
88 OVS_REQUIRES(rstp_mutex
);
89 static void set_bridge_priority__(struct rstp
*)
90 OVS_REQUIRES(rstp_mutex
);
91 static void reinitialize_rstp__(struct rstp
*)
92 OVS_REQUIRES(rstp_mutex
);
93 static bool is_port_number_available__(struct rstp
*, int, struct rstp_port
*)
94 OVS_REQUIRES(rstp_mutex
);
95 static uint16_t rstp_first_free_number__(struct rstp
*, struct rstp_port
*)
96 OVS_REQUIRES(rstp_mutex
);
97 static void rstp_initialize_port_defaults__(struct rstp_port
*)
98 OVS_REQUIRES(rstp_mutex
);
99 static void rstp_port_set_priority__(struct rstp_port
*, int priority
)
100 OVS_REQUIRES(rstp_mutex
);
101 static void rstp_port_set_port_number__(struct rstp_port
*,
102 uint16_t port_number
)
103 OVS_REQUIRES(rstp_mutex
);
104 static void rstp_port_set_path_cost__(struct rstp_port
*, uint32_t path_cost
)
105 OVS_REQUIRES(rstp_mutex
);
106 static void rstp_port_set_administrative_bridge_port__(struct rstp_port
*,
107 uint8_t admin_port_state
)
108 OVS_REQUIRES(rstp_mutex
);
109 static void rstp_port_set_admin_edge__(struct rstp_port
*, bool admin_edge
)
110 OVS_REQUIRES(rstp_mutex
);
111 static void rstp_port_set_auto_edge__(struct rstp_port
*, bool auto_edge
)
112 OVS_REQUIRES(rstp_mutex
);
113 static void rstp_port_set_admin_point_to_point_mac__(struct rstp_port
*,
114 enum rstp_admin_point_to_point_mac_state admin_p2p_mac_state
)
115 OVS_REQUIRES(rstp_mutex
);
116 static void rstp_port_set_mcheck__(struct rstp_port
*, bool mcheck
)
117 OVS_REQUIRES(rstp_mutex
);
118 static void reinitialize_port__(struct rstp_port
*p
)
119 OVS_REQUIRES(rstp_mutex
);
122 rstp_state_name(enum rstp_state state
)
129 case RSTP_FORWARDING
:
131 case RSTP_DISCARDING
:
139 rstp_port_role_name(enum rstp_port_role role
)
144 case ROLE_DESIGNATED
:
157 /* Caller has to hold a reference to prevent 'rstp' from being deleted
158 * while taking a new reference. */
160 rstp_ref(struct rstp
*rstp
)
161 OVS_EXCLUDED(rstp_mutex
)
164 ovs_refcount_ref(&rstp
->ref_cnt
);
169 /* Frees RSTP struct when reference count reaches zero. */
171 rstp_unref(struct rstp
*rstp
)
172 OVS_EXCLUDED(rstp_mutex
)
174 if (rstp
&& ovs_refcount_unref_relaxed(&rstp
->ref_cnt
) == 1) {
175 ovs_mutex_lock(&rstp_mutex
);
177 /* Each RSTP port points back to struct rstp without holding a
178 * reference for that pointer. This is OK as we never move
179 * ports from one bridge to another, and holders always
180 * release their ports before releasing the bridge. This
181 * means that there should be not ports at this time. */
182 ovs_assert(hmap_is_empty(&rstp
->ports
));
184 list_remove(&rstp
->node
);
185 ovs_mutex_unlock(&rstp_mutex
);
191 /* Returns the port number. Mutex is needed to guard against
192 * concurrent reinitialization (which can temporarily clear the
195 rstp_port_get_number(const struct rstp_port
*p
)
196 OVS_EXCLUDED(rstp_mutex
)
200 ovs_mutex_lock(&rstp_mutex
);
201 number
= p
->port_number
;
202 ovs_mutex_unlock(&rstp_mutex
);
207 static void rstp_unixctl_tcn(struct unixctl_conn
*, int argc
,
208 const char *argv
[], void *aux
);
210 /* Decrements the State Machines' timers. */
212 rstp_tick_timers(struct rstp
*rstp
)
213 OVS_EXCLUDED(rstp_mutex
)
215 ovs_mutex_lock(&rstp_mutex
);
216 decrease_rstp_port_timers__(rstp
);
217 ovs_mutex_unlock(&rstp_mutex
);
220 /* Processes an incoming BPDU. */
222 rstp_port_received_bpdu(struct rstp_port
*rp
, const void *bpdu
,
224 OVS_EXCLUDED(rstp_mutex
)
226 ovs_mutex_lock(&rstp_mutex
);
227 /* Only process packets on ports that have RSTP enabled. */
228 if (rp
&& rp
->rstp_state
!= RSTP_DISABLED
) {
229 process_received_bpdu__(rp
, bpdu
, bpdu_size
);
231 ovs_mutex_unlock(&rstp_mutex
);
236 OVS_EXCLUDED(rstp_mutex
)
238 unixctl_command_register("rstp/tcn", "[bridge]", 0, 1, rstp_unixctl_tcn
,
242 /* Creates and returns a new RSTP instance that initially has no ports. */
244 rstp_create(const char *name
, rstp_identifier bridge_address
,
245 void (*send_bpdu
)(struct ofpbuf
*bpdu
, void *port_aux
,
248 OVS_EXCLUDED(rstp_mutex
)
252 VLOG_DBG("Creating RSTP instance");
254 rstp
= xzalloc(sizeof *rstp
);
255 rstp
->name
= xstrdup(name
);
257 /* Initialize the ports map before calling any setters,
258 * so that the state machines will see an empty ports map. */
259 hmap_init(&rstp
->ports
);
261 ovs_mutex_lock(&rstp_mutex
);
262 /* Set bridge address. */
263 rstp_set_bridge_address__(rstp
, bridge_address
);
264 /* Set default parameters values. */
265 rstp_set_bridge_priority__(rstp
, RSTP_DEFAULT_PRIORITY
);
266 rstp_set_bridge_ageing_time__(rstp
, RSTP_DEFAULT_AGEING_TIME
);
267 rstp_set_bridge_force_protocol_version__(rstp
, FPV_DEFAULT
);
268 rstp_set_bridge_forward_delay__(rstp
, RSTP_DEFAULT_BRIDGE_FORWARD_DELAY
);
269 rstp_set_bridge_hello_time__(rstp
);
270 rstp_set_bridge_max_age__(rstp
, RSTP_DEFAULT_BRIDGE_MAX_AGE
);
271 rstp_set_bridge_migrate_time__(rstp
);
272 rstp_set_bridge_transmit_hold_count__(rstp
,
273 RSTP_DEFAULT_TRANSMIT_HOLD_COUNT
);
274 rstp_set_bridge_times__(rstp
, RSTP_DEFAULT_BRIDGE_FORWARD_DELAY
,
275 RSTP_BRIDGE_HELLO_TIME
,
276 RSTP_DEFAULT_BRIDGE_MAX_AGE
, 0);
277 rstp
->send_bpdu
= send_bpdu
;
279 rstp
->changes
= false;
282 ovs_refcount_init(&rstp
->ref_cnt
);
284 list_push_back(all_rstps
, &rstp
->node
);
285 ovs_mutex_unlock(&rstp_mutex
);
287 VLOG_DBG("RSTP instance creation done");
291 /* Called by rstp_set_bridge_address() and rstp_set_bridge_priority(),
292 * it updates the bridge priority vector according to the values passed by
296 set_bridge_priority__(struct rstp
*rstp
)
297 OVS_REQUIRES(rstp_mutex
)
301 rstp
->bridge_priority
.root_bridge_id
= rstp
->bridge_identifier
;
302 rstp
->bridge_priority
.designated_bridge_id
= rstp
->bridge_identifier
;
303 VLOG_DBG("%s: new bridge identifier: "RSTP_ID_FMT
"", rstp
->name
,
304 RSTP_ID_ARGS(rstp
->bridge_identifier
));
306 /* [17.13] When the bridge address changes, recalculates all priority
309 HMAP_FOR_EACH (p
, node
, &rstp
->ports
) {
313 rstp
->changes
= true;
314 updt_roles_tree__(rstp
);
317 /* Sets the bridge address. */
319 rstp_set_bridge_address__(struct rstp
*rstp
, rstp_identifier bridge_address
)
320 OVS_REQUIRES(rstp_mutex
)
322 VLOG_DBG("%s: set bridge address to: "RSTP_ID_FMT
"", rstp
->name
,
323 RSTP_ID_ARGS(bridge_address
));
325 rstp
->address
= bridge_address
;
326 rstp
->bridge_identifier
= bridge_address
;
327 set_bridge_priority__(rstp
);
330 /* Sets the bridge address. */
332 rstp_set_bridge_address(struct rstp
*rstp
, rstp_identifier bridge_address
)
333 OVS_EXCLUDED(rstp_mutex
)
335 ovs_mutex_lock(&rstp_mutex
);
336 rstp_set_bridge_address__(rstp
, bridge_address
);
337 ovs_mutex_unlock(&rstp_mutex
);
341 rstp_get_name(const struct rstp
*rstp
)
342 OVS_EXCLUDED(rstp_mutex
)
346 ovs_mutex_lock(&rstp_mutex
);
348 ovs_mutex_unlock(&rstp_mutex
);
353 rstp_get_bridge_id(const struct rstp
*rstp
)
354 OVS_EXCLUDED(rstp_mutex
)
356 rstp_identifier bridge_id
;
358 ovs_mutex_lock(&rstp_mutex
);
359 bridge_id
= rstp
->bridge_identifier
;
360 ovs_mutex_unlock(&rstp_mutex
);
365 /* Sets the bridge priority. */
367 rstp_set_bridge_priority__(struct rstp
*rstp
, int new_priority
)
368 OVS_REQUIRES(rstp_mutex
)
370 new_priority
= ROUND_DOWN(new_priority
, RSTP_PRIORITY_STEP
);
372 if (new_priority
>= RSTP_MIN_PRIORITY
373 && new_priority
<= RSTP_MAX_PRIORITY
) {
374 VLOG_DBG("%s: set bridge priority to %d", rstp
->name
, new_priority
);
376 rstp
->priority
= new_priority
;
377 rstp
->bridge_identifier
&= 0x0000ffffffffffffULL
;
378 rstp
->bridge_identifier
|= (uint64_t)new_priority
<< 48;
379 set_bridge_priority__(rstp
);
384 rstp_set_bridge_priority(struct rstp
*rstp
, int new_priority
)
385 OVS_EXCLUDED(rstp_mutex
)
387 ovs_mutex_lock(&rstp_mutex
);
388 rstp_set_bridge_priority__(rstp
, new_priority
);
389 ovs_mutex_unlock(&rstp_mutex
);
392 /* Sets the bridge ageing time. */
394 rstp_set_bridge_ageing_time__(struct rstp
*rstp
, int new_ageing_time
)
395 OVS_REQUIRES(rstp_mutex
)
397 if (new_ageing_time
>= RSTP_MIN_AGEING_TIME
398 && new_ageing_time
<= RSTP_MAX_AGEING_TIME
) {
399 VLOG_DBG("%s: set ageing time to %d", rstp
->name
, new_ageing_time
);
401 rstp
->ageing_time
= new_ageing_time
;
406 rstp_set_bridge_ageing_time(struct rstp
*rstp
, int new_ageing_time
)
407 OVS_EXCLUDED(rstp_mutex
)
409 ovs_mutex_lock(&rstp_mutex
);
410 rstp_set_bridge_ageing_time__(rstp
, new_ageing_time
);
411 ovs_mutex_unlock(&rstp_mutex
);
414 /* Reinitializes RSTP when switching from RSTP mode to STP mode
418 reinitialize_rstp__(struct rstp
*rstp
)
419 OVS_REQUIRES(rstp_mutex
)
422 static struct hmap ports
;
425 /* Copy rstp in temp */
429 /* stop and clear rstp */
430 memset(rstp
, 0, sizeof(struct rstp
));
432 /* Initialize rstp. */
433 rstp
->name
= temp
.name
;
435 /* Initialize the ports hmap before calling any setters,
436 * so that the state machines will see an empty ports list. */
437 hmap_init(&rstp
->ports
);
439 /* Set bridge address. */
440 rstp_set_bridge_address__(rstp
, temp
.address
);
441 /* Set default parameters values. */
442 rstp_set_bridge_priority__(rstp
, RSTP_DEFAULT_PRIORITY
);
443 rstp_set_bridge_ageing_time__(rstp
, RSTP_DEFAULT_AGEING_TIME
);
444 rstp_set_bridge_forward_delay__(rstp
, RSTP_DEFAULT_BRIDGE_FORWARD_DELAY
);
445 rstp_set_bridge_hello_time__(rstp
);
446 rstp_set_bridge_max_age__(rstp
, RSTP_DEFAULT_BRIDGE_MAX_AGE
);
447 rstp_set_bridge_migrate_time__(rstp
);
448 rstp_set_bridge_transmit_hold_count__(rstp
,
449 RSTP_DEFAULT_TRANSMIT_HOLD_COUNT
);
450 rstp_set_bridge_times__(rstp
, RSTP_DEFAULT_BRIDGE_FORWARD_DELAY
,
451 RSTP_BRIDGE_HELLO_TIME
,
452 RSTP_DEFAULT_BRIDGE_MAX_AGE
, 0);
454 rstp
->send_bpdu
= temp
.send_bpdu
;
455 rstp
->aux
= temp
.aux
;
456 rstp
->node
= temp
.node
;
457 rstp
->changes
= false;
463 HMAP_FOR_EACH (p
, node
, &rstp
->ports
) {
464 reinitialize_port__(p
);
467 rstp
->ref_cnt
= temp
.ref_cnt
;
470 /* Sets the force protocol version parameter. */
472 rstp_set_bridge_force_protocol_version__(struct rstp
*rstp
,
473 enum rstp_force_protocol_version new_force_protocol_version
)
474 OVS_REQUIRES(rstp_mutex
)
476 if (new_force_protocol_version
!= rstp
->force_protocol_version
&&
477 (new_force_protocol_version
== FPV_STP_COMPATIBILITY
||
478 new_force_protocol_version
== FPV_DEFAULT
)) {
479 VLOG_DBG("%s: set bridge Force Protocol Version to %d", rstp
->name
,
480 new_force_protocol_version
);
482 /* [17.13] The Spanning Tree Protocol Entity shall be reinitialized,
483 * as specified by the assertion of BEGIN (17.18.1) in the state
484 * machine specification.
486 reinitialize_rstp__(rstp
);
487 rstp
->force_protocol_version
= new_force_protocol_version
;
488 if (rstp
->force_protocol_version
< 2) {
489 rstp
->stp_version
= true;
490 rstp
->rstp_version
= false;
492 rstp
->stp_version
= false;
493 rstp
->rstp_version
= true;
495 rstp
->changes
= true;
501 rstp_set_bridge_force_protocol_version(struct rstp
*rstp
,
502 enum rstp_force_protocol_version new_force_protocol_version
)
503 OVS_EXCLUDED(rstp_mutex
)
505 ovs_mutex_lock(&rstp_mutex
);
506 rstp_set_bridge_force_protocol_version__(rstp
, new_force_protocol_version
);
507 ovs_mutex_unlock(&rstp_mutex
);
510 /* Sets the bridge Hello Time parameter. */
512 rstp_set_bridge_hello_time__(struct rstp
*rstp
)
513 OVS_REQUIRES(rstp_mutex
)
515 VLOG_DBG("%s: set RSTP Hello Time to %d", rstp
->name
,
516 RSTP_BRIDGE_HELLO_TIME
);
517 /* 2 is the only acceptable value. */
518 rstp
->bridge_hello_time
= RSTP_BRIDGE_HELLO_TIME
;
521 /* Sets the bridge max age parameter. */
523 rstp_set_bridge_max_age__(struct rstp
*rstp
, int new_max_age
)
524 OVS_REQUIRES(rstp_mutex
)
526 if (rstp
->bridge_max_age
!= new_max_age
527 && new_max_age
>= RSTP_MIN_BRIDGE_MAX_AGE
528 && new_max_age
<= RSTP_MAX_BRIDGE_MAX_AGE
) {
530 if ((2 * (rstp
->bridge_forward_delay
- 1) >= new_max_age
)
531 && (new_max_age
>= 2 * rstp
->bridge_hello_time
)) {
532 VLOG_DBG("%s: set RSTP bridge Max Age to %d", rstp
->name
,
535 rstp
->bridge_max_age
= new_max_age
;
536 rstp
->bridge_times
.max_age
= new_max_age
;
537 rstp
->changes
= true;
538 updt_roles_tree__(rstp
);
544 rstp_set_bridge_max_age(struct rstp
*rstp
, int new_max_age
)
545 OVS_EXCLUDED(rstp_mutex
)
547 ovs_mutex_lock(&rstp_mutex
);
548 rstp_set_bridge_max_age__(rstp
, new_max_age
);
549 ovs_mutex_unlock(&rstp_mutex
);
552 /* Sets the bridge forward delay parameter. */
554 rstp_set_bridge_forward_delay__(struct rstp
*rstp
, int new_forward_delay
)
555 OVS_REQUIRES(rstp_mutex
)
557 if (rstp
->bridge_forward_delay
!= new_forward_delay
558 && new_forward_delay
>= RSTP_MIN_BRIDGE_FORWARD_DELAY
559 && new_forward_delay
<= RSTP_MAX_BRIDGE_FORWARD_DELAY
) {
560 if (2 * (new_forward_delay
- 1) >= rstp
->bridge_max_age
) {
561 VLOG_DBG("%s: set RSTP Forward Delay to %d", rstp
->name
,
563 rstp
->bridge_forward_delay
= new_forward_delay
;
564 rstp
->bridge_times
.forward_delay
= new_forward_delay
;
565 rstp
->changes
= true;
566 updt_roles_tree__(rstp
);
572 rstp_set_bridge_forward_delay(struct rstp
*rstp
, int new_forward_delay
)
573 OVS_EXCLUDED(rstp_mutex
)
575 ovs_mutex_lock(&rstp_mutex
);
576 rstp_set_bridge_forward_delay__(rstp
, new_forward_delay
);
577 ovs_mutex_unlock(&rstp_mutex
);
580 /* Sets the bridge transmit hold count parameter. */
582 rstp_set_bridge_transmit_hold_count__(struct rstp
*rstp
,
583 int new_transmit_hold_count
)
584 OVS_REQUIRES(rstp_mutex
)
586 if (new_transmit_hold_count
>= RSTP_MIN_TRANSMIT_HOLD_COUNT
587 && new_transmit_hold_count
<= RSTP_MAX_TRANSMIT_HOLD_COUNT
) {
590 VLOG_DBG("%s: set RSTP Transmit Hold Count to %d", rstp
->name
,
591 new_transmit_hold_count
);
592 /* Resetting txCount on all ports [17.13]. */
594 rstp
->transmit_hold_count
= new_transmit_hold_count
;
595 HMAP_FOR_EACH (p
, node
, &rstp
->ports
) {
602 rstp_set_bridge_transmit_hold_count(struct rstp
*rstp
,
603 int new_transmit_hold_count
)
604 OVS_EXCLUDED(rstp_mutex
)
606 ovs_mutex_lock(&rstp_mutex
);
607 rstp_set_bridge_transmit_hold_count__(rstp
, new_transmit_hold_count
);
608 ovs_mutex_unlock(&rstp_mutex
);
611 /* Sets the bridge migrate time parameter. */
613 rstp_set_bridge_migrate_time__(struct rstp
*rstp
)
614 OVS_REQUIRES(rstp_mutex
)
616 VLOG_DBG("%s: set RSTP Migrate Time to %d", rstp
->name
,
618 /* 3 is the only acceptable value */
619 rstp
->migrate_time
= RSTP_MIGRATE_TIME
;
622 /* Sets the bridge times. */
624 rstp_set_bridge_times__(struct rstp
*rstp
, int new_forward_delay
,
625 int new_hello_time
, int new_max_age
,
627 OVS_REQUIRES(rstp_mutex
)
629 VLOG_DBG("%s: set RSTP times to (%d, %d, %d, %d)", rstp
->name
,
630 new_forward_delay
, new_hello_time
, new_max_age
, new_message_age
);
631 if (new_forward_delay
>= RSTP_MIN_BRIDGE_FORWARD_DELAY
632 && new_forward_delay
<= RSTP_MAX_BRIDGE_FORWARD_DELAY
) {
633 rstp
->bridge_times
.forward_delay
= new_forward_delay
;
635 if (new_hello_time
== RSTP_BRIDGE_HELLO_TIME
) {
636 rstp
->bridge_times
.hello_time
= new_hello_time
;
638 if (new_max_age
>= RSTP_MIN_BRIDGE_MAX_AGE
639 && new_max_age
<= RSTP_MAX_BRIDGE_MAX_AGE
) {
640 rstp
->bridge_times
.max_age
= new_max_age
;
642 rstp
->bridge_times
.message_age
= new_message_age
;
645 /* Sets the port id, it is called by rstp_port_set_port_number__() or
646 * rstp_port_set_priority__().
649 set_port_id__(struct rstp_port
*p
)
650 OVS_REQUIRES(rstp_mutex
)
655 /* [9.2.7] Port identifier. */
656 p
->port_id
= p
->port_number
| (p
->priority
<< 8);
657 VLOG_DBG("%s: new RSTP port id "RSTP_PORT_ID_FMT
"", rstp
->name
,
661 /* Sets the port priority. */
663 rstp_port_set_priority__(struct rstp_port
*port
, int priority
)
664 OVS_REQUIRES(rstp_mutex
)
666 if (priority
>= RSTP_MIN_PORT_PRIORITY
667 && priority
<= RSTP_MAX_PORT_PRIORITY
) {
668 VLOG_DBG("%s, port %u: set RSTP port priority to %d", port
->rstp
->name
,
669 port
->port_number
, priority
);
671 priority
-= priority
% RSTP_STEP_PORT_PRIORITY
;
672 port
->priority
= priority
;
674 port
->selected
= false;
675 port
->reselect
= true;
679 /* Checks if a port number is available. */
681 is_port_number_available__(struct rstp
*rstp
, int n
, struct rstp_port
*port
)
682 OVS_REQUIRES(rstp_mutex
)
684 if (n
>= 1 && n
<= RSTP_MAX_PORTS
) {
685 struct rstp_port
*p
= rstp_get_port__(rstp
, n
);
687 return p
== NULL
|| p
== port
;
693 rstp_first_free_number__(struct rstp
*rstp
, struct rstp_port
*rstp_port
)
694 OVS_REQUIRES(rstp_mutex
)
698 while (free_number
<= RSTP_MAX_PORTS
) {
699 if (is_port_number_available__(rstp
, free_number
, rstp_port
)) {
704 VLOG_DBG("%s, No free port number available.", rstp
->name
);
708 /* Sets the port number. */
710 rstp_port_set_port_number__(struct rstp_port
*port
, uint16_t port_number
)
711 OVS_REQUIRES(rstp_mutex
)
713 /* If new_port_number is available, use it, otherwise use the first free
714 * available port number. */
716 is_port_number_available__(port
->rstp
, port_number
, port
)
718 : rstp_first_free_number__(port
->rstp
, port
);
721 /* [17.13] is not clear. I suppose that a port number change
722 * should trigger reselection like a port priority change. */
723 port
->selected
= false;
724 port
->reselect
= true;
726 VLOG_DBG("%s: set new RSTP port number %d", port
->rstp
->name
,
730 /* Converts the link speed to a port path cost [Table 17-3]. */
732 rstp_convert_speed_to_cost(unsigned int speed
)
736 value
= speed
>= 10000000 ? 2 /* 10 Tb/s. */
737 : speed
>= 1000000 ? 20 /* 1 Tb/s. */
738 : speed
>= 100000 ? 200 /* 100 Gb/s. */
739 : speed
>= 10000 ? 2000 /* 10 Gb/s. */
740 : speed
>= 1000 ? 20000 /* 1 Gb/s. */
741 : speed
>= 100 ? 200000 /* 100 Mb/s. */
742 : speed
>= 10 ? 2000000 /* 10 Mb/s. */
743 : speed
>= 1 ? 20000000 /* 1 Mb/s. */
744 : RSTP_DEFAULT_PORT_PATH_COST
; /* 100 Mb/s. */
749 /* Sets the port path cost. */
751 rstp_port_set_path_cost__(struct rstp_port
*port
, uint32_t path_cost
)
752 OVS_REQUIRES(rstp_mutex
)
754 if (path_cost
>= RSTP_MIN_PORT_PATH_COST
755 && path_cost
<= RSTP_MAX_PORT_PATH_COST
) {
756 VLOG_DBG("%s, port %u, set RSTP port path cost to %d",
757 port
->rstp
->name
, port
->port_number
, path_cost
);
759 port
->port_path_cost
= path_cost
;
760 port
->selected
= false;
761 port
->reselect
= true;
765 /* Gets the root path cost. */
767 rstp_get_root_path_cost(const struct rstp
*rstp
)
768 OVS_EXCLUDED(rstp_mutex
)
772 ovs_mutex_lock(&rstp_mutex
);
773 cost
= rstp
->root_priority
.root_path_cost
;
774 ovs_mutex_unlock(&rstp_mutex
);
778 /* Returns true if something has happened to 'rstp' which necessitates
779 * flushing the client's MAC learning table.
782 rstp_check_and_reset_fdb_flush(struct rstp
*rstp
)
783 OVS_EXCLUDED(rstp_mutex
)
790 ovs_mutex_lock(&rstp_mutex
);
791 HMAP_FOR_EACH (p
, node
, &rstp
->ports
) {
794 /* fdb_flush should be reset by the filtering database
795 * once the entries are removed if rstp_version is TRUE, and
796 * immediately if stp_version is TRUE.*/
797 p
->fdb_flush
= false;
800 ovs_mutex_unlock(&rstp_mutex
);
804 /* Finds a port whose state has changed, and returns the aux pointer set for
805 * the port. A NULL pointer is returned when no changed port is found. On
806 * return '*portp' contains the pointer to the rstp port that changed, or NULL
807 * if no changed port can be found.
809 * If '*portp' is passed as non-NULL, it must be the value set by the last
810 * invocation of this function.
812 * This function may only be called by the thread that creates and deletes
813 * ports. Otherwise this function is not thread safe, as the returned
814 * '*portp' could become stale before it is used in the next invocation. */
816 rstp_get_next_changed_port_aux(struct rstp
*rstp
, struct rstp_port
**portp
)
820 ovs_mutex_lock(&rstp_mutex
);
821 if (*portp
== NULL
) {
824 HMAP_FOR_EACH (p
, node
, &rstp
->ports
) {
825 if (p
->state_changed
) {
826 p
->state_changed
= false;
832 } else { /* continue */
833 struct rstp_port
*p
= *portp
;
835 HMAP_FOR_EACH_CONTINUE (p
, node
, &rstp
->ports
) {
836 if (p
->state_changed
) {
837 p
->state_changed
= false;
844 /* No changed port found. */
847 ovs_mutex_unlock(&rstp_mutex
);
851 /* Returns the port in 'rstp' with number 'port_number'.
853 * XXX: May only be called while concurrent deletion of ports is excluded. */
854 static struct rstp_port
*
855 rstp_get_port__(struct rstp
*rstp
, uint16_t port_number
)
856 OVS_REQUIRES(rstp_mutex
)
858 struct rstp_port
*port
;
860 ovs_assert(rstp
&& port_number
> 0 && port_number
<= RSTP_MAX_PORTS
);
862 HMAP_FOR_EACH_WITH_HASH (port
, node
, hash_int(port_number
, 0),
864 if (port
->port_number
== port_number
) {
872 rstp_get_port(struct rstp
*rstp
, uint16_t port_number
)
873 OVS_EXCLUDED(rstp_mutex
)
877 ovs_mutex_lock(&rstp_mutex
);
878 p
= rstp_get_port__(rstp
, port_number
);
879 ovs_mutex_unlock(&rstp_mutex
);
884 rstp_get_port_aux(struct rstp
*rstp
, uint16_t port_number
)
885 OVS_EXCLUDED(rstp_mutex
)
890 ovs_mutex_lock(&rstp_mutex
);
891 p
= rstp_get_port__(rstp
, port_number
);
893 ovs_mutex_unlock(&rstp_mutex
);
897 /* Updates the port_enabled parameter. */
899 update_port_enabled__(struct rstp_port
*p
)
900 OVS_REQUIRES(rstp_mutex
)
902 if (p
->mac_operational
&& p
->is_administrative_bridge_port
903 == RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED
) {
904 p
->port_enabled
= true;
906 p
->port_enabled
= false;
910 /* Sets the port MAC_Operational parameter [6.4.2]. */
912 rstp_port_set_mac_operational(struct rstp_port
*p
, bool new_mac_operational
)
913 OVS_EXCLUDED(rstp_mutex
)
917 ovs_mutex_lock(&rstp_mutex
);
919 if (p
->mac_operational
!= new_mac_operational
) {
920 p
->mac_operational
= new_mac_operational
;
921 update_port_enabled__(p
);
922 rstp
->changes
= true;
925 ovs_mutex_unlock(&rstp_mutex
);
928 /* Sets the port Administrative Bridge Port parameter. */
930 rstp_port_set_administrative_bridge_port__(struct rstp_port
*p
,
931 uint8_t admin_port_state
)
932 OVS_REQUIRES(rstp_mutex
)
934 VLOG_DBG("%s, port %u: set RSTP port admin-port-state to %d",
935 p
->rstp
->name
, p
->port_number
, admin_port_state
);
937 if (admin_port_state
== RSTP_ADMIN_BRIDGE_PORT_STATE_DISABLED
938 || admin_port_state
== RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED
) {
940 p
->is_administrative_bridge_port
= admin_port_state
;
941 update_port_enabled__(p
);
945 /* Sets the port oper_point_to_point_mac parameter. */
947 rstp_port_set_oper_point_to_point_mac__(struct rstp_port
*p
,
948 uint8_t new_oper_p2p_mac
)
949 OVS_REQUIRES(rstp_mutex
)
951 if (new_oper_p2p_mac
== RSTP_OPER_P2P_MAC_STATE_DISABLED
952 || new_oper_p2p_mac
== RSTP_OPER_P2P_MAC_STATE_ENABLED
) {
954 p
->oper_point_to_point_mac
= new_oper_p2p_mac
;
955 update_port_enabled__(p
);
959 /* Initializes a port with the defaults values for its parameters. */
961 rstp_initialize_port_defaults__(struct rstp_port
*p
)
962 OVS_REQUIRES(rstp_mutex
)
964 rstp_port_set_administrative_bridge_port__(p
,
965 RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED
);
966 rstp_port_set_oper_point_to_point_mac__(p
,
967 RSTP_OPER_P2P_MAC_STATE_ENABLED
);
968 rstp_port_set_path_cost__(p
, RSTP_DEFAULT_PORT_PATH_COST
);
969 rstp_port_set_admin_edge__(p
, false);
970 rstp_port_set_auto_edge__(p
, true);
971 rstp_port_set_mcheck__(p
, false);
973 /* Initialize state machines. */
974 p
->port_receive_sm_state
= PORT_RECEIVE_SM_INIT
;
975 p
->port_protocol_migration_sm_state
= PORT_PROTOCOL_MIGRATION_SM_INIT
;
976 p
->bridge_detection_sm_state
= BRIDGE_DETECTION_SM_INIT
;
977 p
->port_transmit_sm_state
= PORT_TRANSMIT_SM_INIT
;
978 p
->port_information_sm_state
= PORT_INFORMATION_SM_INIT
;
979 p
->port_role_transition_sm_state
= PORT_ROLE_TRANSITION_SM_INIT
;
980 p
->port_state_transition_sm_state
= PORT_STATE_TRANSITION_SM_INIT
;
981 p
->topology_change_sm_state
= TOPOLOGY_CHANGE_SM_INIT
;
987 reinitialize_port__(struct rstp_port
*p
)
988 OVS_REQUIRES(rstp_mutex
)
990 struct rstp_port temp_port
;
995 memset(p
, 0, sizeof(struct rstp_port
));
997 p
->ref_cnt
= temp_port
.ref_cnt
;
999 p
->node
= temp_port
.node
;
1000 p
->aux
= temp_port
.aux
;
1001 p
->port_number
= temp_port
.port_number
;
1002 p
->port_priority
= temp_port
.port_priority
;
1003 p
->port_id
= temp_port
.port_id
;
1004 p
->rstp_state
= RSTP_DISCARDING
;
1006 rstp_initialize_port_defaults__(p
);
1008 VLOG_DBG("%s: RSTP port "RSTP_PORT_ID_FMT
" reinitialized.", rstp
->name
,
1013 reinitialize_port(struct rstp_port
*p
)
1014 OVS_EXCLUDED(rstp_mutex
)
1016 ovs_mutex_lock(&rstp_mutex
);
1017 reinitialize_port__(p
);
1018 ovs_mutex_unlock(&rstp_mutex
);
1021 /* Sets the port state. */
1023 rstp_port_set_state__(struct rstp_port
*p
, enum rstp_state state
)
1024 OVS_REQUIRES(rstp_mutex
)
1029 VLOG_DBG("%s, port %u: set RSTP port state %s -> %s", rstp
->name
,
1031 rstp_state_name(p
->rstp_state
), rstp_state_name(state
));
1033 if (state
!= p
->rstp_state
&& !p
->state_changed
) {
1034 p
->state_changed
= true;
1035 seq_change(connectivity_seq_get());
1037 p
->rstp_state
= state
;
1041 rstp_port_set_state(struct rstp_port
*p
, enum rstp_state state
)
1042 OVS_EXCLUDED(rstp_mutex
)
1044 ovs_mutex_lock(&rstp_mutex
);
1045 rstp_port_set_state__(p
, state
);
1046 ovs_mutex_unlock(&rstp_mutex
);
1049 /* Adds a RSTP port. */
1051 rstp_add_port(struct rstp
*rstp
)
1052 OVS_EXCLUDED(rstp_mutex
)
1054 struct rstp_port
*p
= xzalloc(sizeof *p
);
1056 ovs_refcount_init(&p
->ref_cnt
);
1058 ovs_mutex_lock(&rstp_mutex
);
1060 rstp_port_set_priority__(p
, RSTP_DEFAULT_PORT_PRIORITY
);
1061 rstp_port_set_port_number__(p
, 0);
1063 rstp_initialize_port_defaults__(p
);
1064 VLOG_DBG("%s: RSTP port "RSTP_PORT_ID_FMT
" initialized.", rstp
->name
,
1067 rstp_port_set_state__(p
, RSTP_DISCARDING
);
1068 hmap_insert(&rstp
->ports
, &p
->node
, hash_int(p
->port_number
, 0));
1069 rstp
->changes
= true;
1071 VLOG_DBG("%s: added port "RSTP_PORT_ID_FMT
"", rstp
->name
, p
->port_id
);
1072 ovs_mutex_unlock(&rstp_mutex
);
1076 /* Caller has to hold a reference to prevent 'rstp_port' from being deleted
1077 * while taking a new reference. */
1079 rstp_port_ref(const struct rstp_port
*rp_
)
1080 OVS_EXCLUDED(rstp_mutex
)
1082 struct rstp_port
*rp
= CONST_CAST(struct rstp_port
*, rp_
);
1085 ovs_refcount_ref(&rp
->ref_cnt
);
1090 /* Frees RSTP struct. This can be caller by any thread. */
1092 rstp_port_unref(struct rstp_port
*rp
)
1093 OVS_EXCLUDED(rstp_mutex
)
1095 if (rp
&& ovs_refcount_unref_relaxed(&rp
->ref_cnt
) == 1) {
1098 ovs_mutex_lock(&rstp_mutex
);
1100 rstp_port_set_state__(rp
, RSTP_DISABLED
);
1101 hmap_remove(&rstp
->ports
, &rp
->node
);
1102 VLOG_DBG("%s: removed port "RSTP_PORT_ID_FMT
"", rstp
->name
,
1104 ovs_mutex_unlock(&rstp_mutex
);
1109 /* Sets the port Admin Edge parameter. */
1111 rstp_port_set_admin_edge__(struct rstp_port
*port
, bool admin_edge
)
1112 OVS_REQUIRES(rstp_mutex
)
1114 if (port
->admin_edge
!= admin_edge
) {
1115 VLOG_DBG("%s, port %u: set RSTP Admin Edge to %d", port
->rstp
->name
,
1116 port
->port_number
, admin_edge
);
1118 port
->admin_edge
= admin_edge
;
1122 /* Sets the port Auto Edge parameter. */
1124 rstp_port_set_auto_edge__(struct rstp_port
*port
, bool auto_edge
)
1125 OVS_REQUIRES(rstp_mutex
)
1127 if (port
->auto_edge
!= auto_edge
) {
1128 VLOG_DBG("%s, port %u: set RSTP Auto Edge to %d", port
->rstp
->name
,
1129 port
->port_number
, auto_edge
);
1131 port
->auto_edge
= auto_edge
;
1135 /* Sets the port admin_point_to_point_mac parameter. */
1136 static void rstp_port_set_admin_point_to_point_mac__(struct rstp_port
*port
,
1137 enum rstp_admin_point_to_point_mac_state admin_p2p_mac_state
)
1138 OVS_REQUIRES(rstp_mutex
)
1140 VLOG_DBG("%s, port %u: set RSTP port admin-point-to-point-mac to %d",
1141 port
->rstp
->name
, port
->port_number
, admin_p2p_mac_state
);
1143 if (admin_p2p_mac_state
== RSTP_ADMIN_P2P_MAC_FORCE_TRUE
) {
1144 port
->admin_point_to_point_mac
= admin_p2p_mac_state
;
1145 rstp_port_set_oper_point_to_point_mac__(port
,
1146 RSTP_OPER_P2P_MAC_STATE_ENABLED
);
1147 } else if (admin_p2p_mac_state
== RSTP_ADMIN_P2P_MAC_FORCE_FALSE
) {
1148 port
->admin_point_to_point_mac
= admin_p2p_mac_state
;
1149 rstp_port_set_oper_point_to_point_mac__(port
,
1150 RSTP_OPER_P2P_MAC_STATE_DISABLED
);
1151 } else if (admin_p2p_mac_state
== RSTP_ADMIN_P2P_MAC_AUTO
) {
1152 /* If adminPointToPointMAC is set to Auto, then the value of
1153 * operPointToPointMAC is determined in accordance with the
1154 * specific procedures defined for the MAC entity concerned, as
1155 * defined in 6.5. If these procedures determine that the MAC
1156 * entity is connected to a point-to-point LAN, then
1157 * operPointToPointMAC is set TRUE; otherwise it is set FALSE.
1158 * In the absence of a specific definition of how to determine
1159 * whether the MAC is connected to a point-to-point LAN or not,
1160 * the value of operPointToPointMAC shall be FALSE. */
1161 port
->admin_point_to_point_mac
= admin_p2p_mac_state
;
1162 rstp_port_set_oper_point_to_point_mac__(
1163 port
, RSTP_OPER_P2P_MAC_STATE_DISABLED
);
1167 /* Sets the port mcheck parameter.
1168 * [17.19.13] May be set by management to force the Port Protocol Migration
1169 * state machine to transmit RST BPDUs for a MigrateTime (17.13.9) period, to
1170 * test whether all STP Bridges (17.4) on the attached LAN have been removed
1171 * and the Port can continue to transmit RSTP BPDUs. Setting mcheck has no
1172 * effect if stpVersion (17.20.12) is TRUE, i.e., the Bridge is operating in
1173 * STP Compatibility mode.
1176 rstp_port_set_mcheck__(struct rstp_port
*port
, bool mcheck
)
1177 OVS_REQUIRES(rstp_mutex
)
1179 if (mcheck
== true && port
->rstp
->force_protocol_version
>= 2) {
1180 port
->mcheck
= true;
1182 VLOG_DBG("%s, port %u: set RSTP mcheck to %d", port
->rstp
->name
,
1183 port
->port_number
, mcheck
);
1187 /* Returns the designated bridge id. */
1189 rstp_get_designated_id(const struct rstp
*rstp
)
1190 OVS_EXCLUDED(rstp_mutex
)
1192 rstp_identifier designated_id
;
1194 ovs_mutex_lock(&rstp_mutex
);
1195 designated_id
= rstp
->root_priority
.designated_bridge_id
;
1196 ovs_mutex_unlock(&rstp_mutex
);
1198 return designated_id
;
1201 /* Returns the root bridge id. */
1203 rstp_get_root_id(const struct rstp
*rstp
)
1204 OVS_EXCLUDED(rstp_mutex
)
1206 rstp_identifier root_id
;
1208 ovs_mutex_lock(&rstp_mutex
);
1209 root_id
= rstp
->root_priority
.root_bridge_id
;
1210 ovs_mutex_unlock(&rstp_mutex
);
1215 /* Returns the designated port id. */
1217 rstp_get_designated_port_id(const struct rstp
*rstp
)
1218 OVS_EXCLUDED(rstp_mutex
)
1220 uint16_t designated_port_id
;
1222 ovs_mutex_lock(&rstp_mutex
);
1223 designated_port_id
= rstp
->root_priority
.designated_port_id
;
1224 ovs_mutex_unlock(&rstp_mutex
);
1226 return designated_port_id
;
1229 /* Return the bridge port id. */
1231 rstp_get_bridge_port_id(const struct rstp
*rstp
)
1232 OVS_EXCLUDED(rstp_mutex
)
1234 uint16_t bridge_port_id
;
1236 ovs_mutex_lock(&rstp_mutex
);
1237 bridge_port_id
= rstp
->root_priority
.bridge_port_id
;
1238 ovs_mutex_unlock(&rstp_mutex
);
1240 return bridge_port_id
;
1243 /* Returns true if the bridge believes to the be root of the spanning tree,
1247 rstp_is_root_bridge(const struct rstp
*rstp
)
1248 OVS_EXCLUDED(rstp_mutex
)
1252 ovs_mutex_lock(&rstp_mutex
);
1253 is_root
= rstp
->bridge_identifier
==
1254 rstp
->root_priority
.designated_bridge_id
;
1255 ovs_mutex_unlock(&rstp_mutex
);
1260 /* Returns the bridge ID of the bridge currently believed to be the root. */
1262 rstp_get_designated_root(const struct rstp
*rstp
)
1263 OVS_EXCLUDED(rstp_mutex
)
1265 rstp_identifier designated_root
;
1267 ovs_mutex_lock(&rstp_mutex
);
1268 designated_root
= rstp
->root_priority
.designated_bridge_id
;
1269 ovs_mutex_unlock(&rstp_mutex
);
1271 return designated_root
;
1274 /* Returns the port connecting 'rstp' to the root bridge, or a null pointer if
1275 * there is no such port.
1278 rstp_get_root_port(struct rstp
*rstp
)
1279 OVS_EXCLUDED(rstp_mutex
)
1281 struct rstp_port
*p
;
1283 ovs_mutex_lock(&rstp_mutex
);
1284 HMAP_FOR_EACH (p
, node
, &rstp
->ports
) {
1285 if (p
->port_id
== rstp
->root_port_id
) {
1286 ovs_mutex_unlock(&rstp_mutex
);
1290 ovs_mutex_unlock(&rstp_mutex
);
1294 /* Returns the state of port 'p'. */
1296 rstp_port_get_state(const struct rstp_port
*p
)
1298 enum rstp_state state
;
1300 ovs_mutex_lock(&rstp_mutex
);
1301 state
= p
->rstp_state
;
1302 ovs_mutex_unlock(&rstp_mutex
);
1307 /* Retrieves port status. */
1309 rstp_port_get_status(const struct rstp_port
*p
, uint16_t *id
,
1310 enum rstp_state
*state
, enum rstp_port_role
*role
,
1311 rstp_identifier
*designated_bridge_id
,
1312 uint16_t *designated_port_id
,
1313 uint32_t *designated_path_cost
, int *tx_count
,
1314 int *rx_count
, int *error_count
, int *uptime
)
1315 OVS_EXCLUDED(rstp_mutex
)
1317 ovs_mutex_lock(&rstp_mutex
);
1319 *state
= p
->rstp_state
;
1322 *designated_bridge_id
= p
->port_priority
.designated_bridge_id
;
1323 *designated_port_id
= p
->port_priority
.designated_port_id
;
1324 *designated_path_cost
= p
->port_priority
.root_path_cost
;
1326 *tx_count
= p
->tx_count
;
1327 *rx_count
= p
->rx_rstp_bpdu_cnt
;
1328 *error_count
= p
->error_count
;
1329 *uptime
= p
->uptime
;
1330 ovs_mutex_unlock(&rstp_mutex
);
1334 rstp_port_set(struct rstp_port
*port
, uint16_t port_num
, int priority
,
1335 uint32_t path_cost
, bool is_admin_edge
, bool is_auto_edge
,
1336 enum rstp_admin_point_to_point_mac_state admin_p2p_mac_state
,
1337 bool admin_port_state
, bool do_mcheck
, void *aux
)
1338 OVS_EXCLUDED(rstp_mutex
)
1340 ovs_mutex_lock(&rstp_mutex
);
1342 rstp_port_set_priority__(port
, priority
);
1343 rstp_port_set_port_number__(port
, port_num
);
1344 rstp_port_set_path_cost__(port
, path_cost
);
1345 rstp_port_set_admin_edge__(port
, is_admin_edge
);
1346 rstp_port_set_auto_edge__(port
, is_auto_edge
);
1347 rstp_port_set_admin_point_to_point_mac__(port
, admin_p2p_mac_state
);
1348 rstp_port_set_administrative_bridge_port__(port
, admin_port_state
);
1349 rstp_port_set_mcheck__(port
, do_mcheck
);
1350 ovs_mutex_unlock(&rstp_mutex
);
1353 /* Individual setters only used by test-rstp.c. */
1355 rstp_port_set_priority(struct rstp_port
*port
, int priority
)
1356 OVS_EXCLUDED(rstp_mutex
)
1358 ovs_mutex_lock(&rstp_mutex
);
1359 rstp_port_set_priority__(port
, priority
);
1360 ovs_mutex_unlock(&rstp_mutex
);
1364 rstp_port_set_path_cost(struct rstp_port
*port
, uint32_t path_cost
)
1365 OVS_EXCLUDED(rstp_mutex
)
1367 ovs_mutex_lock(&rstp_mutex
);
1368 rstp_port_set_path_cost__(port
, path_cost
);
1369 ovs_mutex_unlock(&rstp_mutex
);
1373 rstp_port_set_aux(struct rstp_port
*port
, void *aux
)
1374 OVS_EXCLUDED(rstp_mutex
)
1376 ovs_mutex_lock(&rstp_mutex
);
1378 ovs_mutex_unlock(&rstp_mutex
);
1382 static struct rstp
*
1383 rstp_find(const char *name
)
1384 OVS_REQUIRES(rstp_mutex
)
1388 LIST_FOR_EACH (rstp
, node
, all_rstps
) {
1389 if (!strcmp(rstp
->name
, name
)) {
1397 rstp_unixctl_tcn(struct unixctl_conn
*conn
, int argc
,
1398 const char *argv
[], void *aux OVS_UNUSED
)
1399 OVS_EXCLUDED(rstp_mutex
)
1401 ovs_mutex_lock(&rstp_mutex
);
1403 struct rstp
*rstp
= rstp_find(argv
[1]);
1405 unixctl_command_reply_error(conn
, "No such RSTP object");
1408 rstp
->changes
= true;
1412 LIST_FOR_EACH (rstp
, node
, all_rstps
) {
1413 rstp
->changes
= true;
1417 unixctl_command_reply(conn
, "OK");
1420 ovs_mutex_unlock(&rstp_mutex
);