1 /* Copyright (c) 2011 Nicira Networks
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
22 #include "dynamic-string.h"
27 #include "poll-loop.h"
33 VLOG_DEFINE_THIS_MODULE(lacp);
35 /* Masks for lacp_info state member. */
36 #define LACP_STATE_ACT 0x01 /* Activity. Active or passive? */
37 #define LACP_STATE_TIME 0x02 /* Timeout. Short or long timeout? */
38 #define LACP_STATE_AGG 0x04 /* Aggregation. Is the link is bondable? */
39 #define LACP_STATE_SYNC 0x08 /* Synchronization. Is the link in up to date? */
40 #define LACP_STATE_COL 0x10 /* Collecting. Is the link receiving frames? */
41 #define LACP_STATE_DIST 0x20 /* Distributing. Is the link sending frames? */
42 #define LACP_STATE_DEF 0x40 /* Defaulted. Using default partner info? */
43 #define LACP_STATE_EXP 0x80 /* Expired. Using expired partner info? */
45 #define LACP_FAST_TIME_TX 1000 /* Fast transmission rate. */
46 #define LACP_SLOW_TIME_TX 30000 /* Slow transmission rate. */
47 #define LACP_RX_MULTIPLIER 3 /* Multiply by TX rate to get RX rate. */
49 #define LACP_INFO_LEN 15
51 ovs_be16 sys_priority; /* System priority. */
52 uint8_t sys_id[ETH_ADDR_LEN]; /* System ID. */
53 ovs_be16 key; /* Operational key. */
54 ovs_be16 port_priority; /* Port priority. */
55 ovs_be16 port_id; /* Port ID. */
56 uint8_t state; /* State mask. See LACP_STATE macros. */
57 } __attribute__((packed));
58 BUILD_ASSERT_DECL(LACP_INFO_LEN == sizeof(struct lacp_info));
60 #define LACP_PDU_LEN 110
62 uint8_t subtype; /* Always 1. */
63 uint8_t version; /* Always 1. */
65 uint8_t actor_type; /* Always 1. */
66 uint8_t actor_len; /* Always 20. */
67 struct lacp_info actor; /* LACP actor information. */
68 uint8_t z1[3]; /* Reserved. Always 0. */
70 uint8_t partner_type; /* Always 2. */
71 uint8_t partner_len; /* Always 20. */
72 struct lacp_info partner; /* LACP partner information. */
73 uint8_t z2[3]; /* Reserved. Always 0. */
75 uint8_t collector_type; /* Always 3. */
76 uint8_t collector_len; /* Always 16. */
77 ovs_be16 collector_delay; /* Maximum collector delay. Set to UINT16_MAX. */
78 uint8_t z3[64]; /* Combination of several fields. Always 0. */
79 } __attribute__((packed));
80 BUILD_ASSERT_DECL(LACP_PDU_LEN == sizeof(struct lacp_pdu));
85 LACP_CURRENT, /* Current State. Partner up to date. */
86 LACP_EXPIRED, /* Expired State. Partner out of date. */
87 LACP_DEFAULTED, /* Defaulted State. No partner. */
91 struct list node; /* Node in all_lacps list. */
92 char *name; /* Name of this lacp object. */
93 uint8_t sys_id[ETH_ADDR_LEN]; /* System ID. */
94 uint16_t sys_priority; /* System Priority. */
95 bool active; /* Active or Passive. */
97 struct hmap slaves; /* Slaves this LACP object controls. */
98 struct slave *key_slave; /* Slave whose ID will be the aggregation key. */
100 enum lacp_time lacp_time; /* Fast, Slow or Custom LACP time. */
101 long long int custom_time; /* LACP_TIME_CUSTOM transmission rate. */
102 bool negotiated; /* True if LACP negotiations were successful. */
103 bool update; /* True if lacp_update() needs to be called. */
104 bool heartbeat; /* LACP heartbeat mode. */
108 void *aux; /* Handle used to identify this slave. */
109 struct hmap_node node; /* Node in master's slaves map. */
111 struct lacp *lacp; /* LACP object containing this slave. */
112 uint16_t port_id; /* Port ID. */
113 uint16_t port_priority; /* Port Priority. */
114 uint16_t key; /* Aggregation Key. 0 if default. */
115 char *name; /* Name of this slave. */
117 enum slave_status status; /* Slave status. */
118 bool attached; /* Attached. Traffic may flow. */
119 struct lacp_info partner; /* Partner information. */
120 struct lacp_info ntt_actor; /* Used to decide if we Need To Transmit. */
121 struct timer tx; /* Next message transmission timer. */
122 struct timer rx; /* Expected message receive timer. */
125 static struct list all_lacps = LIST_INITIALIZER(&all_lacps);
127 static void lacp_update_attached(struct lacp *);
129 static void slave_destroy(struct slave *);
130 static void slave_set_defaulted(struct slave *);
131 static void slave_set_expired(struct slave *);
132 static void slave_get_actor(struct slave *, struct lacp_info *actor);
133 static void slave_get_priority(struct slave *, struct lacp_info *priority);
134 static bool slave_may_tx(const struct slave *);
135 static struct slave *slave_lookup(const struct lacp *, const void *slave);
136 static bool info_tx_equal(struct lacp_info *, struct lacp_info *);
138 static void lacp_unixctl_show(struct unixctl_conn *, const char *args,
141 /* Populates 'pdu' with a LACP PDU comprised of 'actor' and 'partner'. */
143 compose_lacp_pdu(const struct lacp_info *actor,
144 const struct lacp_info *partner, struct lacp_pdu *pdu)
146 memset(pdu, 0, sizeof *pdu);
155 pdu->partner_type = 2;
156 pdu->partner_len = 20;
157 pdu->partner = *partner;
159 pdu->collector_type = 3;
160 pdu->collector_len = 16;
161 pdu->collector_delay = htons(0);
164 /* Parses 'b' which represents a packet containing a LACP PDU. This function
165 * returns NULL if 'b' is malformed, or does not represent a LACP PDU format
166 * supported by OVS. Otherwise, it returns a pointer to the lacp_pdu contained
168 static const struct lacp_pdu *
169 parse_lacp_packet(const struct ofpbuf *b)
171 const struct lacp_pdu *pdu;
173 pdu = ofpbuf_at(b, (uint8_t *)b->l3 - (uint8_t *)b->data, LACP_PDU_LEN);
175 if (pdu && pdu->subtype == 1
176 && pdu->actor_type == 1 && pdu->actor_len == 20
177 && pdu->partner_type == 2 && pdu->partner_len == 20) {
184 /* LACP Protocol Implementation. */
186 /* Initializes the lacp module. */
190 unixctl_command_register("lacp/show", "[port]", lacp_unixctl_show, NULL);
193 /* Creates a LACP object. */
199 lacp = xzalloc(sizeof *lacp);
200 hmap_init(&lacp->slaves);
201 list_push_back(&all_lacps, &lacp->node);
205 /* Destroys 'lacp' and its slaves. Does nothing if 'lacp' is NULL. */
207 lacp_destroy(struct lacp *lacp)
210 struct slave *slave, *next;
212 HMAP_FOR_EACH_SAFE (slave, next, node, &lacp->slaves) {
213 slave_destroy(slave);
216 hmap_destroy(&lacp->slaves);
217 list_remove(&lacp->node);
223 /* Configures 'lacp' with settings from 's'. */
225 lacp_configure(struct lacp *lacp, const struct lacp_settings *s)
227 assert(!eth_addr_is_zero(s->id));
229 if (!lacp->name || strcmp(s->name, lacp->name)) {
231 lacp->name = xstrdup(s->name);
234 if (!eth_addr_equals(lacp->sys_id, s->id)
235 || lacp->sys_priority != s->priority
236 || lacp->heartbeat != s->heartbeat) {
237 memcpy(lacp->sys_id, s->id, ETH_ADDR_LEN);
238 lacp->sys_priority = s->priority;
239 lacp->heartbeat = s->heartbeat;
243 lacp->active = s->active;
244 lacp->lacp_time = s->lacp_time;
245 lacp->custom_time = MAX(TIME_UPDATE_INTERVAL, s->custom_time);
248 /* Returns true if 'lacp' is configured in active mode, false if 'lacp' is
249 * configured for passive mode. */
251 lacp_is_active(const struct lacp *lacp)
256 /* Processes 'packet' which was received on 'slave_'. This function should be
257 * called on all packets received on 'slave_' with Ethernet Type ETH_TYPE_LACP.
260 lacp_process_packet(struct lacp *lacp, const void *slave_,
261 const struct ofpbuf *packet)
263 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
264 struct slave *slave = slave_lookup(lacp, slave_);
265 const struct lacp_pdu *pdu;
266 long long int tx_rate;
268 pdu = parse_lacp_packet(packet);
270 VLOG_WARN_RL(&rl, "%s: received an unparsable LACP PDU.", lacp->name);
274 switch (lacp->lacp_time) {
276 tx_rate = LACP_FAST_TIME_TX;
279 tx_rate = LACP_SLOW_TIME_TX;
281 case LACP_TIME_CUSTOM:
282 tx_rate = lacp->custom_time;
284 default: NOT_REACHED();
287 slave->status = LACP_CURRENT;
288 timer_set_duration(&slave->rx, LACP_RX_MULTIPLIER * tx_rate);
290 slave->ntt_actor = pdu->partner;
292 /* Update our information about our partner if it's out of date. This may
293 * cause priorities to change so re-calculate attached status of all
295 if (memcmp(&slave->partner, &pdu->actor, sizeof pdu->actor)) {
297 slave->partner = pdu->actor;
301 /* Returns true if 'lacp' has successfully negotiated with its partner. False
302 * if 'lacp' is NULL. */
304 lacp_negotiated(const struct lacp *lacp)
306 return lacp ? lacp->negotiated : false;
309 /* Registers 'slave_' as subordinate to 'lacp'. This should be called at least
310 * once per slave in a LACP managed bond. Should also be called whenever a
311 * slave's settings change. */
313 lacp_slave_register(struct lacp *lacp, void *slave_,
314 const struct lacp_slave_settings *s)
316 struct slave *slave = slave_lookup(lacp, slave_);
319 slave = xzalloc(sizeof *slave);
322 hmap_insert(&lacp->slaves, &slave->node, hash_pointer(slave_, 0));
323 slave_set_defaulted(slave);
325 if (!lacp->key_slave) {
326 lacp->key_slave = slave;
330 if (!slave->name || strcmp(s->name, slave->name)) {
332 slave->name = xstrdup(s->name);
335 if (slave->port_id != s->id
336 || slave->port_priority != s->priority
337 || slave->key != s->key) {
338 slave->port_id = s->id;
339 slave->port_priority = s->priority;
344 if (lacp->active || lacp->negotiated) {
345 slave_set_expired(slave);
350 /* Unregisters 'slave_' with 'lacp'. */
352 lacp_slave_unregister(struct lacp *lacp, const void *slave_)
354 struct slave *slave = slave_lookup(lacp, slave_);
357 slave_destroy(slave);
362 /* This function should be called whenever the carrier status of 'slave_' has
365 lacp_slave_carrier_changed(const struct lacp *lacp, const void *slave_)
367 struct slave *slave = slave_lookup(lacp, slave_);
369 if (slave->status == LACP_CURRENT || slave->lacp->active) {
370 slave_set_expired(slave);
374 /* This function should be called before enabling 'slave_' to send or receive
375 * traffic. If it returns false, 'slave_' should not enabled. As a
376 * convenience, returns true if 'lacp' is NULL. */
378 lacp_slave_may_enable(const struct lacp *lacp, const void *slave_)
381 struct slave *slave = slave_lookup(lacp, slave_);
383 /* The slave may be enabled if it's attached to an aggregator and its
384 * partner is synchronized. The only exception is defaulted slaves.
385 * They are not required to have synchronized partners because they
386 * have no partners at all. They will only be attached if negotiations
387 * failed on all slaves in the bond. */
388 return slave->attached && (slave->partner.state & LACP_STATE_SYNC
389 || slave->status == LACP_DEFAULTED);
395 /* Returns the port ID used for 'slave_' in LACP communications. */
397 lacp_slave_get_port_id(const struct lacp *lacp, const void *slave_)
399 struct slave *slave = slave_lookup(lacp, slave_);
400 return slave->port_id;
403 /* Returns true if partner information on 'slave_' is up to date. 'slave_'
404 * not being current, generally indicates a connectivity problem, or a
405 * misconfigured (or broken) partner. */
407 lacp_slave_is_current(const struct lacp *lacp, const void *slave_)
409 return slave_lookup(lacp, slave_)->status != LACP_DEFAULTED;
412 /* This function should be called periodically to update 'lacp'. */
414 lacp_run(struct lacp *lacp, lacp_send_pdu *send_pdu)
418 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
419 if (timer_expired(&slave->rx)) {
420 if (slave->status == LACP_CURRENT) {
421 slave_set_expired(slave);
422 } else if (slave->status == LACP_EXPIRED) {
423 slave_set_defaulted(slave);
429 lacp_update_attached(lacp);
432 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
433 struct lacp_info actor;
435 if (!slave_may_tx(slave)) {
439 slave_get_actor(slave, &actor);
441 if (timer_expired(&slave->tx)
442 || !info_tx_equal(&actor, &slave->ntt_actor)) {
443 long long int duration;
446 slave->ntt_actor = actor;
447 compose_lacp_pdu(&actor, &slave->partner, &pdu);
448 send_pdu(slave->aux, &pdu, sizeof pdu);
450 if (lacp->lacp_time == LACP_TIME_CUSTOM) {
451 duration = lacp->custom_time;
453 duration = (slave->partner.state & LACP_STATE_TIME
455 : LACP_SLOW_TIME_TX);
458 timer_set_duration(&slave->tx, duration);
463 /* Causes poll_block() to wake up when lacp_run() needs to be called again. */
465 lacp_wait(struct lacp *lacp)
469 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
470 if (slave_may_tx(slave)) {
471 timer_wait(&slave->tx);
474 if (slave->status != LACP_DEFAULTED) {
475 timer_wait(&slave->rx);
480 /* Static Helpers. */
482 /* Updates the attached status of all slaves controlled by 'lacp' and sets its
483 * negotiated parameter to true if any slaves are attachable. */
485 lacp_update_attached(struct lacp *lacp)
487 struct slave *lead, *slave;
488 struct lacp_info lead_pri;
489 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
491 if (lacp->heartbeat) {
492 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
493 slave->attached = slave->status != LACP_DEFAULTED;
498 lacp->update = false;
501 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
502 struct lacp_info pri;
504 slave->attached = true;
506 /* XXX: In the future allow users to configure the expected system ID.
507 * For now just special case loopback. */
508 if (eth_addr_equals(slave->partner.sys_id, slave->lacp->sys_id)) {
509 VLOG_WARN_RL(&rl, "slave %s: Loopback detected. Slave is "
510 "connected to its own bond", slave->name);
511 slave->attached = false;
515 if (slave->status == LACP_DEFAULTED) {
519 slave_get_priority(slave, &pri);
521 if (!lead || memcmp(&pri, &lead_pri, sizeof pri) < 0) {
527 lacp->negotiated = lead != NULL;
530 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
531 if (slave->status == LACP_DEFAULTED
532 || lead->partner.key != slave->partner.key
533 || !eth_addr_equals(lead->partner.sys_id,
534 slave->partner.sys_id)) {
535 slave->attached = false;
542 slave_destroy(struct slave *slave)
545 struct lacp *lacp = slave->lacp;
548 hmap_remove(&lacp->slaves, &slave->node);
550 if (lacp->key_slave == slave) {
551 struct hmap_node *slave_node = hmap_first(&lacp->slaves);
554 lacp->key_slave = CONTAINER_OF(slave_node, struct slave, node);
556 lacp->key_slave = NULL;
566 slave_set_defaulted(struct slave *slave)
568 memset(&slave->partner, 0, sizeof slave->partner);
570 slave->lacp->update = true;
571 slave->status = LACP_DEFAULTED;
575 slave_set_expired(struct slave *slave)
577 struct lacp *lacp = slave->lacp;
579 slave->status = LACP_EXPIRED;
580 slave->partner.state |= LACP_STATE_TIME;
581 slave->partner.state &= ~LACP_STATE_SYNC;
583 /* The spec says we should wait LACP_RX_MULTIPLIER * LACP_FAST_TIME_TX.
584 * This doesn't make sense when using custom times which can be much
585 * smaller than LACP_FAST_TIME. */
586 timer_set_duration(&slave->rx, (lacp->lacp_time == LACP_TIME_CUSTOM
588 : LACP_RX_MULTIPLIER * LACP_FAST_TIME_TX));
592 slave_get_actor(struct slave *slave, struct lacp_info *actor)
594 struct lacp *lacp = slave->lacp;
599 state |= LACP_STATE_ACT;
602 if (lacp->lacp_time != LACP_TIME_SLOW) {
603 state |= LACP_STATE_TIME;
606 if (slave->attached) {
607 state |= LACP_STATE_SYNC;
610 if (slave->status == LACP_DEFAULTED) {
611 state |= LACP_STATE_DEF;
614 if (slave->status == LACP_EXPIRED) {
615 state |= LACP_STATE_EXP;
618 if (lacp->heartbeat || hmap_count(&lacp->slaves) > 1) {
619 state |= LACP_STATE_AGG;
622 if (slave->attached || !lacp->negotiated) {
623 state |= LACP_STATE_COL | LACP_STATE_DIST;
626 key = lacp->key_slave->key;
628 key = lacp->key_slave->port_id;
631 actor->state = state;
632 actor->key = htons(key);
633 actor->port_priority = htons(slave->port_priority);
634 actor->port_id = htons(slave->port_id);
635 actor->sys_priority = htons(lacp->sys_priority);
636 memcpy(&actor->sys_id, lacp->sys_id, ETH_ADDR_LEN);
639 /* Given 'slave', populates 'priority' with data representing its LACP link
640 * priority. If two priority objects populated by this function are compared
641 * using memcmp, the higher priority link will be less than the lower priority
644 slave_get_priority(struct slave *slave, struct lacp_info *priority)
646 uint16_t partner_priority, actor_priority;
648 /* Choose the lacp_info of the higher priority system by comparing their
649 * system priorities and mac addresses. */
650 actor_priority = slave->lacp->sys_priority;
651 partner_priority = ntohs(slave->partner.sys_priority);
652 if (actor_priority < partner_priority) {
653 slave_get_actor(slave, priority);
654 } else if (partner_priority < actor_priority) {
655 *priority = slave->partner;
656 } else if (eth_addr_compare_3way(slave->lacp->sys_id,
657 slave->partner.sys_id) < 0) {
658 slave_get_actor(slave, priority);
660 *priority = slave->partner;
663 /* Key and state are not used in priority comparisons. */
669 slave_may_tx(const struct slave *slave)
671 return slave->lacp->active || slave->status != LACP_DEFAULTED;
674 static struct slave *
675 slave_lookup(const struct lacp *lacp, const void *slave_)
679 HMAP_FOR_EACH_IN_BUCKET (slave, node, hash_pointer(slave_, 0),
681 if (slave->aux == slave_) {
689 /* Two lacp_info structures are tx_equal if and only if they do not differ in
690 * ways which would require a lacp_pdu transmission. */
692 info_tx_equal(struct lacp_info *a, struct lacp_info *b)
695 /* LACP specification dictates that we transmit whenever the actor and
696 * remote_actor differ in the following fields: Port, Port Priority,
697 * System, System Priority, Aggregation Key, Activity State, Timeout State,
698 * Sync State, and Aggregation State. The state flags are most likely to
699 * change so are checked first. */
700 return !((a->state ^ b->state) & (LACP_STATE_ACT
704 && a->port_id == b->port_id
705 && a->port_priority == b->port_priority
707 && a->sys_priority == b->sys_priority
708 && eth_addr_equals(a->sys_id, b->sys_id);
712 lacp_find(const char *name)
716 LIST_FOR_EACH (lacp, node, &all_lacps) {
717 if (!strcmp(lacp->name, name)) {
726 ds_put_lacp_state(struct ds *ds, uint8_t state)
728 if (state & LACP_STATE_ACT) {
729 ds_put_cstr(ds, " activity");
732 if (state & LACP_STATE_TIME) {
733 ds_put_cstr(ds, " timeout");
736 if (state & LACP_STATE_AGG) {
737 ds_put_cstr(ds, " aggregation");
740 if (state & LACP_STATE_SYNC) {
741 ds_put_cstr(ds, " synchronized");
744 if (state & LACP_STATE_COL) {
745 ds_put_cstr(ds, " collecting");
748 if (state & LACP_STATE_DIST) {
749 ds_put_cstr(ds, " distributing");
752 if (state & LACP_STATE_DEF) {
753 ds_put_cstr(ds, " defaulted");
756 if (state & LACP_STATE_EXP) {
757 ds_put_cstr(ds, " expired");
762 lacp_print_details(struct ds *ds, struct lacp *lacp)
766 ds_put_format(ds, "---- %s ----\n", lacp->name);
767 ds_put_format(ds, "\tstatus: %s", lacp->active ? "active" : "passive");
768 if (lacp->heartbeat) {
769 ds_put_cstr(ds, " heartbeat");
771 if (lacp->negotiated) {
772 ds_put_cstr(ds, " negotiated");
774 ds_put_cstr(ds, "\n");
776 ds_put_format(ds, "\tsys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(lacp->sys_id));
777 ds_put_format(ds, "\tsys_priority: %u\n", lacp->sys_priority);
778 ds_put_cstr(ds, "\taggregation key: ");
779 if (lacp->key_slave) {
780 ds_put_format(ds, "%u", lacp->key_slave->port_id);
782 ds_put_cstr(ds, "none");
784 ds_put_cstr(ds, "\n");
786 ds_put_cstr(ds, "\tlacp_time: ");
787 switch (lacp->lacp_time) {
789 ds_put_cstr(ds, "fast\n");
792 ds_put_cstr(ds, "slow\n");
794 case LACP_TIME_CUSTOM:
795 ds_put_format(ds, "custom (%lld)\n", lacp->custom_time);
798 ds_put_cstr(ds, "unknown\n");
801 HMAP_FOR_EACH (slave, node, &lacp->slaves) {
803 struct lacp_info actor;
805 slave_get_actor(slave, &actor);
806 switch (slave->status) {
814 status = "defaulted";
820 ds_put_format(ds, "\nslave: %s: %s %s\n", slave->name, status,
821 slave->attached ? "attached" : "detached");
822 ds_put_format(ds, "\tport_id: %u\n", slave->port_id);
823 ds_put_format(ds, "\tport_priority: %u\n", slave->port_priority);
825 ds_put_format(ds, "\n\tactor sys_id: " ETH_ADDR_FMT "\n",
826 ETH_ADDR_ARGS(actor.sys_id));
827 ds_put_format(ds, "\tactor sys_priority: %u\n",
828 ntohs(actor.sys_priority));
829 ds_put_format(ds, "\tactor port_id: %u\n",
830 ntohs(actor.port_id));
831 ds_put_format(ds, "\tactor port_priority: %u\n",
832 ntohs(actor.port_priority));
833 ds_put_format(ds, "\tactor key: %u\n",
835 ds_put_cstr(ds, "\tactor state:");
836 ds_put_lacp_state(ds, actor.state);
837 ds_put_cstr(ds, "\n\n");
839 ds_put_format(ds, "\tpartner sys_id: " ETH_ADDR_FMT "\n",
840 ETH_ADDR_ARGS(slave->partner.sys_id));
841 ds_put_format(ds, "\tpartner sys_priority: %u\n",
842 ntohs(slave->partner.sys_priority));
843 ds_put_format(ds, "\tpartner port_id: %u\n",
844 ntohs(slave->partner.port_id));
845 ds_put_format(ds, "\tpartner port_priority: %u\n",
846 ntohs(slave->partner.port_priority));
847 ds_put_format(ds, "\tpartner key: %u\n",
848 ntohs(slave->partner.key));
849 ds_put_cstr(ds, "\tpartner state:");
850 ds_put_lacp_state(ds, slave->partner.state);
851 ds_put_cstr(ds, "\n");
856 lacp_unixctl_show(struct unixctl_conn *conn,
857 const char *args, void *aux OVS_UNUSED)
859 struct ds ds = DS_EMPTY_INITIALIZER;
863 lacp = lacp_find(args);
865 unixctl_command_reply(conn, 501, "no such lacp object");
868 lacp_print_details(&ds, lacp);
870 LIST_FOR_EACH (lacp, node, &all_lacps) {
871 lacp_print_details(&ds, lacp);
875 unixctl_command_reply(conn, 200, ds_cstr(&ds));