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/* Copyright (c) 2011 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "lacp.h"
#include <assert.h>
#include <stdlib.h>
#include "dynamic-string.h"
#include "hash.h"
#include "hmap.h"
#include "ofpbuf.h"
#include "packets.h"
#include "poll-loop.h"
#include "shash.h"
#include "timer.h"
#include "timeval.h"
#include "unixctl.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(lacp);
/* Masks for lacp_info state member. */
#define LACP_STATE_ACT 0x01 /* Activity. Active or passive? */
#define LACP_STATE_TIME 0x02 /* Timeout. Short or long timeout? */
#define LACP_STATE_AGG 0x04 /* Aggregation. Is the link is bondable? */
#define LACP_STATE_SYNC 0x08 /* Synchronization. Is the link in up to date? */
#define LACP_STATE_COL 0x10 /* Collecting. Is the link receiving frames? */
#define LACP_STATE_DIST 0x20 /* Distributing. Is the link sending frames? */
#define LACP_STATE_DEF 0x40 /* Defaulted. Using default partner info? */
#define LACP_STATE_EXP 0x80 /* Expired. Using expired partner info? */
#define LACP_FAST_TIME_TX 1000 /* Fast transmission rate. */
#define LACP_SLOW_TIME_TX 30000 /* Slow transmission rate. */
#define LACP_RX_MULTIPLIER 3 /* Multiply by TX rate to get RX rate. */
#define LACP_INFO_LEN 15
struct lacp_info {
ovs_be16 sys_priority; /* System priority. */
uint8_t sys_id[ETH_ADDR_LEN]; /* System ID. */
ovs_be16 key; /* Operational key. */
ovs_be16 port_priority; /* Port priority. */
ovs_be16 port_id; /* Port ID. */
uint8_t state; /* State mask. See LACP_STATE macros. */
} __attribute__((packed));
BUILD_ASSERT_DECL(LACP_INFO_LEN == sizeof(struct lacp_info));
#define LACP_PDU_LEN 110
struct lacp_pdu {
uint8_t subtype; /* Always 1. */
uint8_t version; /* Always 1. */
uint8_t actor_type; /* Always 1. */
uint8_t actor_len; /* Always 20. */
struct lacp_info actor; /* LACP actor information. */
uint8_t z1[3]; /* Reserved. Always 0. */
uint8_t partner_type; /* Always 2. */
uint8_t partner_len; /* Always 20. */
struct lacp_info partner; /* LACP partner information. */
uint8_t z2[3]; /* Reserved. Always 0. */
uint8_t collector_type; /* Always 3. */
uint8_t collector_len; /* Always 16. */
ovs_be16 collector_delay; /* Maximum collector delay. Set to UINT16_MAX. */
uint8_t z3[64]; /* Combination of several fields. Always 0. */
} __attribute__((packed));
BUILD_ASSERT_DECL(LACP_PDU_LEN == sizeof(struct lacp_pdu));
/* Implementation. */
enum slave_status {
LACP_CURRENT, /* Current State. Partner up to date. */
LACP_EXPIRED, /* Expired State. Partner out of date. */
LACP_DEFAULTED, /* Defaulted State. No partner. */
};
struct lacp {
struct list node; /* Node in all_lacps list. */
char *name; /* Name of this lacp object. */
uint8_t sys_id[ETH_ADDR_LEN]; /* System ID. */
uint16_t sys_priority; /* System Priority. */
bool active; /* Active or Passive. */
struct hmap slaves; /* Slaves this LACP object controls. */
struct slave *key_slave; /* Slave whose ID will be the aggregation key. */
bool fast; /* True if using fast probe interval. */
bool negotiated; /* True if LACP negotiations were successful. */
bool update; /* True if lacp_update() needs to be called. */
};
struct slave {
void *aux; /* Handle used to identify this slave. */
struct hmap_node node; /* Node in master's slaves map. */
struct lacp *lacp; /* LACP object containing this slave. */
uint16_t port_id; /* Port ID. */
uint16_t port_priority; /* Port Priority. */
uint16_t key; /* Aggregation Key. 0 if default. */
char *name; /* Name of this slave. */
enum slave_status status; /* Slave status. */
bool attached; /* Attached. Traffic may flow. */
struct lacp_info partner; /* Partner information. */
struct lacp_info ntt_actor; /* Used to decide if we Need To Transmit. */
struct timer tx; /* Next message transmission timer. */
struct timer rx; /* Expected message receive timer. */
};
static struct list all_lacps = LIST_INITIALIZER(&all_lacps);
static void lacp_update_attached(struct lacp *);
static void slave_destroy(struct slave *);
static void slave_set_defaulted(struct slave *);
static void slave_set_expired(struct slave *);
static void slave_get_actor(struct slave *, struct lacp_info *actor);
static void slave_get_priority(struct slave *, struct lacp_info *priority);
static bool slave_may_tx(const struct slave *);
static struct slave *slave_lookup(const struct lacp *, const void *slave);
static bool info_tx_equal(struct lacp_info *, struct lacp_info *);
static unixctl_cb_func lacp_unixctl_show;
/* Populates 'pdu' with a LACP PDU comprised of 'actor' and 'partner'. */
static void
compose_lacp_pdu(const struct lacp_info *actor,
const struct lacp_info *partner, struct lacp_pdu *pdu)
{
memset(pdu, 0, sizeof *pdu);
pdu->subtype = 1;
pdu->version = 1;
pdu->actor_type = 1;
pdu->actor_len = 20;
pdu->actor = *actor;
pdu->partner_type = 2;
pdu->partner_len = 20;
pdu->partner = *partner;
pdu->collector_type = 3;
pdu->collector_len = 16;
pdu->collector_delay = htons(0);
}
/* Parses 'b' which represents a packet containing a LACP PDU. This function
* returns NULL if 'b' is malformed, or does not represent a LACP PDU format
* supported by OVS. Otherwise, it returns a pointer to the lacp_pdu contained
* within 'b'. */
static const struct lacp_pdu *
parse_lacp_packet(const struct ofpbuf *b)
{
const struct lacp_pdu *pdu;
pdu = ofpbuf_at(b, (uint8_t *)b->l3 - (uint8_t *)b->data, LACP_PDU_LEN);
if (pdu && pdu->subtype == 1
&& pdu->actor_type == 1 && pdu->actor_len == 20
&& pdu->partner_type == 2 && pdu->partner_len == 20) {
return pdu;
} else {
return NULL;
}
}
/* LACP Protocol Implementation. */
/* Initializes the lacp module. */
void
lacp_init(void)
{
unixctl_command_register("lacp/show", "[port]", 0, 1,
lacp_unixctl_show, NULL);
}
/* Creates a LACP object. */
struct lacp *
lacp_create(void)
{
struct lacp *lacp;
lacp = xzalloc(sizeof *lacp);
hmap_init(&lacp->slaves);
list_push_back(&all_lacps, &lacp->node);
return lacp;
}
/* Destroys 'lacp' and its slaves. Does nothing if 'lacp' is NULL. */
void
lacp_destroy(struct lacp *lacp)
{
if (lacp) {
struct slave *slave, *next;
HMAP_FOR_EACH_SAFE (slave, next, node, &lacp->slaves) {
slave_destroy(slave);
}
hmap_destroy(&lacp->slaves);
list_remove(&lacp->node);
free(lacp->name);
free(lacp);
}
}
/* Configures 'lacp' with settings from 's'. */
void
lacp_configure(struct lacp *lacp, const struct lacp_settings *s)
{
assert(!eth_addr_is_zero(s->id));
if (!lacp->name || strcmp(s->name, lacp->name)) {
free(lacp->name);
lacp->name = xstrdup(s->name);
}
if (!eth_addr_equals(lacp->sys_id, s->id)
|| lacp->sys_priority != s->priority) {
memcpy(lacp->sys_id, s->id, ETH_ADDR_LEN);
lacp->sys_priority = s->priority;
lacp->update = true;
}
lacp->active = s->active;
lacp->fast = s->fast;
}
/* Returns true if 'lacp' is configured in active mode, false if 'lacp' is
* configured for passive mode. */
bool
lacp_is_active(const struct lacp *lacp)
{
return lacp->active;
}
/* Processes 'packet' which was received on 'slave_'. This function should be
* called on all packets received on 'slave_' with Ethernet Type ETH_TYPE_LACP.
*/
void
lacp_process_packet(struct lacp *lacp, const void *slave_,
const struct ofpbuf *packet)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
struct slave *slave = slave_lookup(lacp, slave_);
const struct lacp_pdu *pdu;
long long int tx_rate;
pdu = parse_lacp_packet(packet);
if (!pdu) {
VLOG_WARN_RL(&rl, "%s: received an unparsable LACP PDU.", lacp->name);
return;
}
slave->status = LACP_CURRENT;
tx_rate = lacp->fast ? LACP_FAST_TIME_TX : LACP_SLOW_TIME_TX;
timer_set_duration(&slave->rx, LACP_RX_MULTIPLIER * tx_rate);
slave->ntt_actor = pdu->partner;
/* Update our information about our partner if it's out of date. This may
* cause priorities to change so re-calculate attached status of all
* slaves. */
if (memcmp(&slave->partner, &pdu->actor, sizeof pdu->actor)) {
lacp->update = true;
slave->partner = pdu->actor;
}
}
/* Returns the lacp_status of the given 'lacp' object (which may be NULL). */
enum lacp_status
lacp_status(const struct lacp *lacp)
{
if (!lacp) {
return LACP_DISABLED;
} else if (lacp->negotiated) {
return LACP_NEGOTIATED;
} else {
return LACP_CONFIGURED;
}
}
/* Registers 'slave_' as subordinate to 'lacp'. This should be called at least
* once per slave in a LACP managed bond. Should also be called whenever a
* slave's settings change. */
void
lacp_slave_register(struct lacp *lacp, void *slave_,
const struct lacp_slave_settings *s)
{
struct slave *slave = slave_lookup(lacp, slave_);
if (!slave) {
slave = xzalloc(sizeof *slave);
slave->lacp = lacp;
slave->aux = slave_;
hmap_insert(&lacp->slaves, &slave->node, hash_pointer(slave_, 0));
slave_set_defaulted(slave);
if (!lacp->key_slave) {
lacp->key_slave = slave;
}
}
if (!slave->name || strcmp(s->name, slave->name)) {
free(slave->name);
slave->name = xstrdup(s->name);
}
if (slave->port_id != s->id
|| slave->port_priority != s->priority
|| slave->key != s->key) {
slave->port_id = s->id;
slave->port_priority = s->priority;
slave->key = s->key;
lacp->update = true;
if (lacp->active || lacp->negotiated) {
slave_set_expired(slave);
}
}
}
/* Unregisters 'slave_' with 'lacp'. */
void
lacp_slave_unregister(struct lacp *lacp, const void *slave_)
{
struct slave *slave = slave_lookup(lacp, slave_);
if (slave) {
slave_destroy(slave);
lacp->update = true;
}
}
/* This function should be called whenever the carrier status of 'slave_' has
* changed. If 'lacp' is null, this function has no effect.*/
void
lacp_slave_carrier_changed(const struct lacp *lacp, const void *slave_)
{
if (lacp) {
struct slave *slave = slave_lookup(lacp, slave_);
if (slave->status == LACP_CURRENT || slave->lacp->active) {
slave_set_expired(slave);
}
}
}
static bool
slave_may_enable__(struct slave *slave)
{
/* The slave may be enabled if it's attached to an aggregator and its
* partner is synchronized.*/
return slave->attached && (slave->partner.state & LACP_STATE_SYNC);
}
/* This function should be called before enabling 'slave_' to send or receive
* traffic. If it returns false, 'slave_' should not enabled. As a
* convenience, returns true if 'lacp' is NULL. */
bool
lacp_slave_may_enable(const struct lacp *lacp, const void *slave_)
{
if (lacp) {
return slave_may_enable__(slave_lookup(lacp, slave_));
} else {
return true;
}
}
/* Returns the port ID used for 'slave_' in LACP communications. */
uint16_t
lacp_slave_get_port_id(const struct lacp *lacp, const void *slave_)
{
struct slave *slave = slave_lookup(lacp, slave_);
return slave->port_id;
}
/* Returns true if partner information on 'slave_' is up to date. 'slave_'
* not being current, generally indicates a connectivity problem, or a
* misconfigured (or broken) partner. */
bool
lacp_slave_is_current(const struct lacp *lacp, const void *slave_)
{
return slave_lookup(lacp, slave_)->status != LACP_DEFAULTED;
}
/* This function should be called periodically to update 'lacp'. */
void
lacp_run(struct lacp *lacp, lacp_send_pdu *send_pdu)
{
struct slave *slave;
HMAP_FOR_EACH (slave, node, &lacp->slaves) {
if (timer_expired(&slave->rx)) {
if (slave->status == LACP_CURRENT) {
slave_set_expired(slave);
} else if (slave->status == LACP_EXPIRED) {
slave_set_defaulted(slave);
}
}
}
if (lacp->update) {
lacp_update_attached(lacp);
}
HMAP_FOR_EACH (slave, node, &lacp->slaves) {
struct lacp_info actor;
if (!slave_may_tx(slave)) {
continue;
}
slave_get_actor(slave, &actor);
if (timer_expired(&slave->tx)
|| !info_tx_equal(&actor, &slave->ntt_actor)) {
long long int duration;
struct lacp_pdu pdu;
slave->ntt_actor = actor;
compose_lacp_pdu(&actor, &slave->partner, &pdu);
send_pdu(slave->aux, &pdu, sizeof pdu);
duration = (slave->partner.state & LACP_STATE_TIME
? LACP_FAST_TIME_TX
: LACP_SLOW_TIME_TX);
timer_set_duration(&slave->tx, duration);
}
}
}
/* Causes poll_block() to wake up when lacp_run() needs to be called again. */
void
lacp_wait(struct lacp *lacp)
{
struct slave *slave;
HMAP_FOR_EACH (slave, node, &lacp->slaves) {
if (slave_may_tx(slave)) {
timer_wait(&slave->tx);
}
if (slave->status != LACP_DEFAULTED) {
timer_wait(&slave->rx);
}
}
}
/* Static Helpers. */
/* Updates the attached status of all slaves controlled by 'lacp' and sets its
* negotiated parameter to true if any slaves are attachable. */
static void
lacp_update_attached(struct lacp *lacp)
{
struct slave *lead, *slave;
struct lacp_info lead_pri;
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
lacp->update = false;
lead = NULL;
HMAP_FOR_EACH (slave, node, &lacp->slaves) {
struct lacp_info pri;
slave->attached = false;
/* XXX: In the future allow users to configure the expected system ID.
* For now just special case loopback. */
if (eth_addr_equals(slave->partner.sys_id, slave->lacp->sys_id)) {
VLOG_WARN_RL(&rl, "slave %s: Loopback detected. Slave is "
"connected to its own bond", slave->name);
continue;
}
if (slave->status == LACP_DEFAULTED) {
continue;
}
slave->attached = true;
slave_get_priority(slave, &pri);
if (!lead || memcmp(&pri, &lead_pri, sizeof pri) < 0) {
lead = slave;
lead_pri = pri;
}
}
lacp->negotiated = lead != NULL;
if (lead) {
HMAP_FOR_EACH (slave, node, &lacp->slaves) {
if (lead->partner.key != slave->partner.key
|| !eth_addr_equals(lead->partner.sys_id,
slave->partner.sys_id)) {
slave->attached = false;
}
}
}
}
static void
slave_destroy(struct slave *slave)
{
if (slave) {
struct lacp *lacp = slave->lacp;
lacp->update = true;
hmap_remove(&lacp->slaves, &slave->node);
if (lacp->key_slave == slave) {
struct hmap_node *slave_node = hmap_first(&lacp->slaves);
if (slave_node) {
lacp->key_slave = CONTAINER_OF(slave_node, struct slave, node);
} else {
lacp->key_slave = NULL;
}
}
free(slave->name);
free(slave);
}
}
static void
slave_set_defaulted(struct slave *slave)
{
memset(&slave->partner, 0, sizeof slave->partner);
slave->lacp->update = true;
slave->status = LACP_DEFAULTED;
}
static void
slave_set_expired(struct slave *slave)
{
slave->status = LACP_EXPIRED;
slave->partner.state |= LACP_STATE_TIME;
slave->partner.state &= ~LACP_STATE_SYNC;
timer_set_duration(&slave->rx, LACP_RX_MULTIPLIER * LACP_FAST_TIME_TX);
}
static void
slave_get_actor(struct slave *slave, struct lacp_info *actor)
{
struct lacp *lacp = slave->lacp;
uint16_t key;
uint8_t state = 0;
if (lacp->active) {
state |= LACP_STATE_ACT;
}
if (lacp->fast) {
state |= LACP_STATE_TIME;
}
if (slave->attached) {
state |= LACP_STATE_SYNC;
}
if (slave->status == LACP_DEFAULTED) {
state |= LACP_STATE_DEF;
}
if (slave->status == LACP_EXPIRED) {
state |= LACP_STATE_EXP;
}
if (hmap_count(&lacp->slaves) > 1) {
state |= LACP_STATE_AGG;
}
if (slave->attached || !lacp->negotiated) {
state |= LACP_STATE_COL | LACP_STATE_DIST;
}
key = lacp->key_slave->key;
if (!key) {
key = lacp->key_slave->port_id;
}
actor->state = state;
actor->key = htons(key);
actor->port_priority = htons(slave->port_priority);
actor->port_id = htons(slave->port_id);
actor->sys_priority = htons(lacp->sys_priority);
memcpy(&actor->sys_id, lacp->sys_id, ETH_ADDR_LEN);
}
/* Given 'slave', populates 'priority' with data representing its LACP link
* priority. If two priority objects populated by this function are compared
* using memcmp, the higher priority link will be less than the lower priority
* link. */
static void
slave_get_priority(struct slave *slave, struct lacp_info *priority)
{
uint16_t partner_priority, actor_priority;
/* Choose the lacp_info of the higher priority system by comparing their
* system priorities and mac addresses. */
actor_priority = slave->lacp->sys_priority;
partner_priority = ntohs(slave->partner.sys_priority);
if (actor_priority < partner_priority) {
slave_get_actor(slave, priority);
} else if (partner_priority < actor_priority) {
*priority = slave->partner;
} else if (eth_addr_compare_3way(slave->lacp->sys_id,
slave->partner.sys_id) < 0) {
slave_get_actor(slave, priority);
} else {
*priority = slave->partner;
}
/* Key and state are not used in priority comparisons. */
priority->key = 0;
priority->state = 0;
}
static bool
slave_may_tx(const struct slave *slave)
{
return slave->lacp->active || slave->status != LACP_DEFAULTED;
}
static struct slave *
slave_lookup(const struct lacp *lacp, const void *slave_)
{
struct slave *slave;
HMAP_FOR_EACH_IN_BUCKET (slave, node, hash_pointer(slave_, 0),
&lacp->slaves) {
if (slave->aux == slave_) {
return slave;
}
}
return NULL;
}
/* Two lacp_info structures are tx_equal if and only if they do not differ in
* ways which would require a lacp_pdu transmission. */
static bool
info_tx_equal(struct lacp_info *a, struct lacp_info *b)
{
/* LACP specification dictates that we transmit whenever the actor and
* remote_actor differ in the following fields: Port, Port Priority,
* System, System Priority, Aggregation Key, Activity State, Timeout State,
* Sync State, and Aggregation State. The state flags are most likely to
* change so are checked first. */
return !((a->state ^ b->state) & (LACP_STATE_ACT
| LACP_STATE_TIME
| LACP_STATE_SYNC
| LACP_STATE_AGG))
&& a->port_id == b->port_id
&& a->port_priority == b->port_priority
&& a->key == b->key
&& a->sys_priority == b->sys_priority
&& eth_addr_equals(a->sys_id, b->sys_id);
}
static struct lacp *
lacp_find(const char *name)
{
struct lacp *lacp;
LIST_FOR_EACH (lacp, node, &all_lacps) {
if (!strcmp(lacp->name, name)) {
return lacp;
}
}
return NULL;
}
static void
ds_put_lacp_state(struct ds *ds, uint8_t state)
{
if (state & LACP_STATE_ACT) {
ds_put_cstr(ds, " activity");
}
if (state & LACP_STATE_TIME) {
ds_put_cstr(ds, " timeout");
}
if (state & LACP_STATE_AGG) {
ds_put_cstr(ds, " aggregation");
}
if (state & LACP_STATE_SYNC) {
ds_put_cstr(ds, " synchronized");
}
if (state & LACP_STATE_COL) {
ds_put_cstr(ds, " collecting");
}
if (state & LACP_STATE_DIST) {
ds_put_cstr(ds, " distributing");
}
if (state & LACP_STATE_DEF) {
ds_put_cstr(ds, " defaulted");
}
if (state & LACP_STATE_EXP) {
ds_put_cstr(ds, " expired");
}
}
static void
lacp_print_details(struct ds *ds, struct lacp *lacp)
{
struct shash slave_shash = SHASH_INITIALIZER(&slave_shash);
const struct shash_node **sorted_slaves = NULL;
struct slave *slave;
int i;
ds_put_format(ds, "---- %s ----\n", lacp->name);
ds_put_format(ds, "\tstatus: %s", lacp->active ? "active" : "passive");
if (lacp->negotiated) {
ds_put_cstr(ds, " negotiated");
}
ds_put_cstr(ds, "\n");
ds_put_format(ds, "\tsys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(lacp->sys_id));
ds_put_format(ds, "\tsys_priority: %u\n", lacp->sys_priority);
ds_put_cstr(ds, "\taggregation key: ");
if (lacp->key_slave) {
ds_put_format(ds, "%u", lacp->key_slave->port_id);
} else {
ds_put_cstr(ds, "none");
}
ds_put_cstr(ds, "\n");
ds_put_cstr(ds, "\tlacp_time: ");
if (lacp->fast) {
ds_put_cstr(ds, "fast\n");
} else {
ds_put_cstr(ds, "slow\n");
}
HMAP_FOR_EACH (slave, node, &lacp->slaves) {
shash_add(&slave_shash, slave->name, slave);
}
sorted_slaves = shash_sort(&slave_shash);
for (i = 0; i < shash_count(&slave_shash); i++) {
char *status;
struct lacp_info actor;
slave = sorted_slaves[i]->data;
slave_get_actor(slave, &actor);
switch (slave->status) {
case LACP_CURRENT:
status = "current";
break;
case LACP_EXPIRED:
status = "expired";
break;
case LACP_DEFAULTED:
status = "defaulted";
break;
default:
NOT_REACHED();
}
ds_put_format(ds, "\nslave: %s: %s %s\n", slave->name, status,
slave->attached ? "attached" : "detached");
ds_put_format(ds, "\tport_id: %u\n", slave->port_id);
ds_put_format(ds, "\tport_priority: %u\n", slave->port_priority);
ds_put_format(ds, "\tmay_enable: %s\n", (slave_may_enable__(slave)
? "true" : "false"));
ds_put_format(ds, "\n\tactor sys_id: " ETH_ADDR_FMT "\n",
ETH_ADDR_ARGS(actor.sys_id));
ds_put_format(ds, "\tactor sys_priority: %u\n",
ntohs(actor.sys_priority));
ds_put_format(ds, "\tactor port_id: %u\n",
ntohs(actor.port_id));
ds_put_format(ds, "\tactor port_priority: %u\n",
ntohs(actor.port_priority));
ds_put_format(ds, "\tactor key: %u\n",
ntohs(actor.key));
ds_put_cstr(ds, "\tactor state:");
ds_put_lacp_state(ds, actor.state);
ds_put_cstr(ds, "\n\n");
ds_put_format(ds, "\tpartner sys_id: " ETH_ADDR_FMT "\n",
ETH_ADDR_ARGS(slave->partner.sys_id));
ds_put_format(ds, "\tpartner sys_priority: %u\n",
ntohs(slave->partner.sys_priority));
ds_put_format(ds, "\tpartner port_id: %u\n",
ntohs(slave->partner.port_id));
ds_put_format(ds, "\tpartner port_priority: %u\n",
ntohs(slave->partner.port_priority));
ds_put_format(ds, "\tpartner key: %u\n",
ntohs(slave->partner.key));
ds_put_cstr(ds, "\tpartner state:");
ds_put_lacp_state(ds, slave->partner.state);
ds_put_cstr(ds, "\n");
}
shash_destroy(&slave_shash);
free(sorted_slaves);
}
static void
lacp_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[],
void *aux OVS_UNUSED)
{
struct ds ds = DS_EMPTY_INITIALIZER;
struct lacp *lacp;
if (argc > 1) {
lacp = lacp_find(argv[1]);
if (!lacp) {
unixctl_command_reply_error(conn, "no such lacp object");
return;
}
lacp_print_details(&ds, lacp);
} else {
LIST_FOR_EACH (lacp, node, &all_lacps) {
lacp_print_details(&ds, lacp);
}
}
unixctl_command_reply(conn, ds_cstr(&ds));
ds_destroy(&ds);
}
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