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ovs/lib/lacp.c
Ben Pfaff 91fc374a9c Eliminate use of term "slave" in bond, LACP, and bundle contexts. 
The new term is "member".

Most of these changes should not change user-visible behavior.  One
place where they do is in "ovs-ofctl dump-flows", which will now output
"members:..." inside "bundle" actions instead of "slaves:...".  I don't
expect this to cause real problems in most systems.  The old syntax
is still supported on input for backward compatibility.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
2020-10-21 11:28:24 -07:00

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/* Copyright (c) 2011, 2012, 2013, 2014, 2015 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 <stdlib.h>
#include "connectivity.h"
#include "openvswitch/dynamic-string.h"
#include "hash.h"
#include "openvswitch/hmap.h"
#include "dp-packet.h"
#include "ovs-atomic.h"
#include "packets.h"
#include "openvswitch/poll-loop.h"
#include "seq.h"
#include "openvswitch/shash.h"
#include "timer.h"
#include "timeval.h"
#include "unixctl.h"
#include "openvswitch/vlog.h"
#include "util.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
OVS_PACKED(
struct lacp_info {
ovs_be16 sys_priority; /* System priority. */
struct eth_addr sys_id; /* 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. */
});
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. */
};
BUILD_ASSERT_DECL(LACP_PDU_LEN == sizeof(struct lacp_pdu));
/* Implementation. */
enum pdu_subtype {
SUBTYPE_UNUSED = 0,
SUBTYPE_LACP, /* Link Aggregation Control Protocol. */
SUBTYPE_MARKER, /* Link Aggregation Marker Protocol. */
};
enum member_status {
LACP_CURRENT, /* Current State. Partner up to date. */
LACP_EXPIRED, /* Expired State. Partner out of date. */
LACP_DEFAULTED, /* Defaulted State. No partner. */
};
/* A LACP primary interface. */
struct lacp {
struct ovs_list node; /* Node in all_lacps list. */
char *name; /* Name of this lacp object. */
struct eth_addr sys_id; /* System ID. */
uint16_t sys_priority; /* System Priority. */
bool active; /* Active or Passive. */
struct hmap members; /* Members this LACP object controls. */
struct member *key_member; /* Member whose ID will be 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. */
bool fallback_ab; /* True if fallback to active-backup on LACP failure. */
struct ovs_refcount ref_cnt;
};
/* A LACP member interface. */
struct member {
void *aux; /* Handle used to identify this member. */
struct hmap_node node; /* Node in primary's members map. */
struct lacp *lacp; /* LACP object containing this member. */
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 member. */
enum member_status status; /* Member status. */
bool attached; /* Attached. Traffic may flow. */
bool carrier_up; /* Carrier state of link. */
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. */
uint32_t count_rx_pdus; /* dot3adAggPortStatsLACPDUsRx */
uint32_t count_rx_pdus_bad; /* dot3adAggPortStatsIllegalRx */
uint32_t count_rx_pdus_marker; /* dot3adAggPortStatsMarkerPDUsRx */
uint32_t count_tx_pdus; /* dot3adAggPortStatsLACPDUsTx */
uint32_t count_link_expired; /* Num of times link expired */
uint32_t count_link_defaulted; /* Num of times link defaulted */
uint32_t count_carrier_changed; /* Num of times link status changed */
};
static struct ovs_mutex mutex;
static struct ovs_list all_lacps__ = OVS_LIST_INITIALIZER(&all_lacps__);
static struct ovs_list *const all_lacps OVS_GUARDED_BY(mutex) = &all_lacps__;
static void lacp_update_attached(struct lacp *) OVS_REQUIRES(mutex);
static void member_destroy(struct member *) OVS_REQUIRES(mutex);
static void member_set_defaulted(struct member *) OVS_REQUIRES(mutex);
static void member_set_expired(struct member *) OVS_REQUIRES(mutex);
static void member_get_actor(struct member *, struct lacp_info *actor)
OVS_REQUIRES(mutex);
static void member_get_priority(struct member *, struct lacp_info *priority)
OVS_REQUIRES(mutex);
static bool member_may_tx(const struct member *)
OVS_REQUIRES(mutex);
static struct member *member_lookup(const struct lacp *, const void *member)
OVS_REQUIRES(mutex);
static bool info_tx_equal(struct lacp_info *, struct lacp_info *)
OVS_REQUIRES(mutex);
static bool member_may_enable__(struct member *) OVS_REQUIRES(mutex);
static unixctl_cb_func lacp_unixctl_show;
static unixctl_cb_func lacp_unixctl_show_stats;
/* 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 'p' which represents a packet containing a LACP PDU. This function
* returns NULL if 'p' is malformed, or does not represent a LACP PDU format
* supported by OVS. Otherwise, it returns a pointer to the lacp_pdu contained
* within 'p'. It also returns the subtype of PDU.*/
static const struct lacp_pdu *
parse_lacp_packet(const struct dp_packet *p, enum pdu_subtype *subtype)
{
const struct lacp_pdu *pdu;
pdu = dp_packet_at(p, (uint8_t *)dp_packet_l3(p) - (uint8_t *)dp_packet_data(p),
LACP_PDU_LEN);
if (pdu && pdu->subtype == 1
&& pdu->actor_type == 1 && pdu->actor_len == 20
&& pdu->partner_type == 2 && pdu->partner_len == 20) {
*subtype = SUBTYPE_LACP;
return pdu;
} else if (pdu && pdu->subtype == SUBTYPE_MARKER) {
*subtype = SUBTYPE_MARKER;
return NULL;
} else{
*subtype = SUBTYPE_UNUSED;
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);
unixctl_command_register("lacp/show-stats", "[port]", 0, 1,
lacp_unixctl_show_stats, NULL);
}
static void
lacp_lock(void) OVS_ACQUIRES(mutex)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
if (ovsthread_once_start(&once)) {
ovs_mutex_init_recursive(&mutex);
ovsthread_once_done(&once);
}
ovs_mutex_lock(&mutex);
}
static void
lacp_unlock(void) OVS_RELEASES(mutex)
{
ovs_mutex_unlock(&mutex);
}
/* Creates a LACP object. */
struct lacp *
lacp_create(void) OVS_EXCLUDED(mutex)
{
struct lacp *lacp;
lacp = xzalloc(sizeof *lacp);
hmap_init(&lacp->members);
ovs_refcount_init(&lacp->ref_cnt);
lacp_lock();
ovs_list_push_back(all_lacps, &lacp->node);
lacp_unlock();
return lacp;
}
struct lacp *
lacp_ref(const struct lacp *lacp_)
{
struct lacp *lacp = CONST_CAST(struct lacp *, lacp_);
if (lacp) {
ovs_refcount_ref(&lacp->ref_cnt);
}
return lacp;
}
/* Destroys 'lacp' and its members. Does nothing if 'lacp' is NULL. */
void
lacp_unref(struct lacp *lacp) OVS_EXCLUDED(mutex)
{
if (lacp && ovs_refcount_unref_relaxed(&lacp->ref_cnt) == 1) {
struct member *member, *next;
lacp_lock();
HMAP_FOR_EACH_SAFE (member, next, node, &lacp->members) {
member_destroy(member);
}
hmap_destroy(&lacp->members);
ovs_list_remove(&lacp->node);
free(lacp->name);
free(lacp);
lacp_unlock();
}
}
/* Configures 'lacp' with settings from 's'. */
void
lacp_configure(struct lacp *lacp, const struct lacp_settings *s)
OVS_EXCLUDED(mutex)
{
ovs_assert(!eth_addr_is_zero(s->id));
lacp_lock();
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) {
lacp->sys_id = s->id;
lacp->sys_priority = s->priority;
lacp->update = true;
}
lacp->active = s->active;
lacp->fast = s->fast;
if (lacp->fallback_ab != s->fallback_ab_cfg) {
lacp->fallback_ab = s->fallback_ab_cfg;
lacp->update = true;
}
lacp_unlock();
}
/* 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) OVS_EXCLUDED(mutex)
{
bool ret;
lacp_lock();
ret = lacp->active;
lacp_unlock();
return ret;
}
/* Processes 'packet' which was received on 'member_'. This function should be
* called on all packets received on 'member_' with Ethernet Type
* ETH_TYPE_LACP.
*/
bool
lacp_process_packet(struct lacp *lacp, const void *member_,
const struct dp_packet *packet)
OVS_EXCLUDED(mutex)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
const struct lacp_pdu *pdu;
long long int tx_rate;
struct member *member;
bool lacp_may_enable = false;
enum pdu_subtype subtype;
lacp_lock();
member = member_lookup(lacp, member_);
if (!member) {
goto out;
}
member->count_rx_pdus++;
pdu = parse_lacp_packet(packet, &subtype);
switch (subtype) {
case SUBTYPE_LACP:
break;
case SUBTYPE_MARKER:
member->count_rx_pdus_marker++;
VLOG_DBG("%s: received a LACP marker PDU.", lacp->name);
goto out;
case SUBTYPE_UNUSED:
default:
member->count_rx_pdus_bad++;
VLOG_WARN_RL(&rl, "%s: received an unparsable LACP PDU.",
lacp->name);
goto out;
}
/* On some NICs L1 state reporting is slow. In case LACP packets are
* received while carrier (L1) state is still down, drop the LACP PDU and
* trigger re-checking of L1 state. */
if (!member->carrier_up) {
VLOG_INFO_RL(&rl, "%s: carrier state is DOWN,"
" dropping received LACP PDU.", member->name);
seq_change(connectivity_seq_get());
goto out;
}
member->status = LACP_CURRENT;
tx_rate = lacp->fast ? LACP_FAST_TIME_TX : LACP_SLOW_TIME_TX;
timer_set_duration(&member->rx, LACP_RX_MULTIPLIER * tx_rate);
member->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
* members. */
if (memcmp(&member->partner, &pdu->actor, sizeof pdu->actor)) {
lacp->update = true;
member->partner = pdu->actor;
}
/* Evaluate may_enable here to avoid dropping of packets till main thread
* sets may_enable to true. */
lacp_may_enable = member_may_enable__(member);
out:
lacp_unlock();
return lacp_may_enable;
}
/* Returns the lacp_status of the given 'lacp' object (which may be NULL). */
enum lacp_status
lacp_status(const struct lacp *lacp) OVS_EXCLUDED(mutex)
{
if (lacp) {
enum lacp_status ret;
lacp_lock();
ret = lacp->negotiated ? LACP_NEGOTIATED : LACP_CONFIGURED;
lacp_unlock();
return ret;
} else {
/* Don't take 'mutex'. It might not even be initialized, since we
* don't know that any lacp object has been created. */
return LACP_DISABLED;
}
}
/* Registers 'member_' as subordinate to 'lacp'. This should be called at
* least once per member in a LACP managed bond. Should also be called
* whenever a member's settings change. */
void
lacp_member_register(struct lacp *lacp, void *member_,
const struct lacp_member_settings *s)
OVS_EXCLUDED(mutex)
{
struct member *member;
lacp_lock();
member = member_lookup(lacp, member_);
if (!member) {
member = xzalloc(sizeof *member);
member->lacp = lacp;
member->aux = member_;
hmap_insert(&lacp->members, &member->node, hash_pointer(member_, 0));
member_set_defaulted(member);
if (!lacp->key_member) {
lacp->key_member = member;
}
}
if (!member->name || strcmp(s->name, member->name)) {
free(member->name);
member->name = xstrdup(s->name);
}
if (member->port_id != s->id
|| member->port_priority != s->priority
|| member->key != s->key) {
member->port_id = s->id;
member->port_priority = s->priority;
member->key = s->key;
lacp->update = true;
if (lacp->active || lacp->negotiated) {
member_set_expired(member);
}
}
lacp_unlock();
}
/* Unregisters 'member_' with 'lacp'. */
void
lacp_member_unregister(struct lacp *lacp, const void *member_)
OVS_EXCLUDED(mutex)
{
struct member *member;
lacp_lock();
member = member_lookup(lacp, member_);
if (member) {
member_destroy(member);
lacp->update = true;
}
lacp_unlock();
}
/* This function should be called whenever the carrier status of 'member_' has
* changed. If 'lacp' is null, this function has no effect.*/
void
lacp_member_carrier_changed(const struct lacp *lacp, const void *member_,
bool carrier_up)
OVS_EXCLUDED(mutex)
{
struct member *member;
if (!lacp) {
return;
}
lacp_lock();
member = member_lookup(lacp, member_);
if (!member) {
goto out;
}
if (member->status == LACP_CURRENT || member->lacp->active) {
member_set_expired(member);
}
if (member->carrier_up != carrier_up) {
member->carrier_up = carrier_up;
member->count_carrier_changed++;
}
out:
lacp_unlock();
}
static bool
member_may_enable__(struct member *member) OVS_REQUIRES(mutex)
{
/* The member may be enabled if it's attached to an aggregator and its
* partner is synchronized.*/
return member->attached && (member->partner.state & LACP_STATE_SYNC
|| (member->lacp && member->lacp->fallback_ab
&& member->status == LACP_DEFAULTED));
}
/* This function should be called before enabling 'member_' to send or receive
* traffic. If it returns false, 'member_' should not enabled. As a
* convenience, returns true if 'lacp' is NULL. */
bool
lacp_member_may_enable(const struct lacp *lacp, const void *member_)
OVS_EXCLUDED(mutex)
{
if (lacp) {
struct member *member;
bool ret = false;
lacp_lock();
member = member_lookup(lacp, member_);
if (member) {
/* It is only called when carrier is up. So, enable member's
* carrier state if it is currently down. */
if (!member->carrier_up) {
member->carrier_up = true;
}
ret = member_may_enable__(member);
}
lacp_unlock();
return ret;
} else {
return true;
}
}
/* Returns true if partner information on 'member_' is up to date. 'member_'
* not being current, generally indicates a connectivity problem, or a
* misconfigured (or broken) partner. */
bool
lacp_member_is_current(const struct lacp *lacp, const void *member_)
OVS_EXCLUDED(mutex)
{
struct member *member;
bool ret;
lacp_lock();
member = member_lookup(lacp, member_);
ret = member ? member->status != LACP_DEFAULTED : false;
lacp_unlock();
return ret;
}
/* This function should be called periodically to update 'lacp'. */
void
lacp_run(struct lacp *lacp, lacp_send_pdu *send_pdu) OVS_EXCLUDED(mutex)
{
struct member *member;
lacp_lock();
HMAP_FOR_EACH (member, node, &lacp->members) {
if (timer_expired(&member->rx)) {
enum member_status old_status = member->status;
if (member->status == LACP_CURRENT) {
member_set_expired(member);
member->count_link_expired++;
} else if (member->status == LACP_EXPIRED) {
member_set_defaulted(member);
member->count_link_defaulted++;
}
if (member->status != old_status) {
seq_change(connectivity_seq_get());
}
}
}
if (lacp->update) {
lacp_update_attached(lacp);
seq_change(connectivity_seq_get());
}
HMAP_FOR_EACH (member, node, &lacp->members) {
struct lacp_info actor;
if (!member_may_tx(member)) {
continue;
}
member_get_actor(member, &actor);
if (timer_expired(&member->tx)
|| !info_tx_equal(&actor, &member->ntt_actor)) {
long long int duration;
struct lacp_pdu pdu;
member->ntt_actor = actor;
compose_lacp_pdu(&actor, &member->partner, &pdu);
send_pdu(member->aux, &pdu, sizeof pdu);
member->count_tx_pdus++;
duration = (member->partner.state & LACP_STATE_TIME
? LACP_FAST_TIME_TX
: LACP_SLOW_TIME_TX);
timer_set_duration(&member->tx, duration);
seq_change(connectivity_seq_get());
}
}
lacp_unlock();
}
/* Causes poll_block() to wake up when lacp_run() needs to be called again. */
void
lacp_wait(struct lacp *lacp) OVS_EXCLUDED(mutex)
{
struct member *member;
lacp_lock();
HMAP_FOR_EACH (member, node, &lacp->members) {
if (member_may_tx(member)) {
timer_wait(&member->tx);
}
if (member->status != LACP_DEFAULTED) {
timer_wait(&member->rx);
}
}
lacp_unlock();
}
/* Static Helpers. */
/* Updates the attached status of all members controlled by 'lacp' and sets its
* negotiated parameter to true if any members are attachable. */
static void
lacp_update_attached(struct lacp *lacp) OVS_REQUIRES(mutex)
{
struct member *lead, *lead_current, *member;
struct lacp_info lead_pri;
bool lead_enable;
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
lacp->update = false;
lead = NULL;
lead_current = NULL;
lead_enable = false;
/* Check if there is a working interface.
* Store as lead_current, if there is one. */
HMAP_FOR_EACH (member, node, &lacp->members) {
if (member->status == LACP_CURRENT && member->attached) {
struct lacp_info pri;
member_get_priority(member, &pri);
if (!lead_current || memcmp(&pri, &lead_pri, sizeof pri) < 0) {
lead_current = member;
lead = lead_current;
lead_pri = pri;
lead_enable = true;
}
}
}
/* Find interface with highest priority. */
HMAP_FOR_EACH (member, node, &lacp->members) {
struct lacp_info pri;
member->attached = false;
/* XXX: In the future allow users to configure the expected system ID.
* For now just special case loopback. */
if (eth_addr_equals(member->partner.sys_id, member->lacp->sys_id)) {
VLOG_WARN_RL(&rl, "member %s: Loopback detected. Interface is "
"connected to its own bond", member->name);
continue;
}
if (member->status == LACP_DEFAULTED) {
if (lacp->fallback_ab) {
member->attached = true;
}
continue;
}
member_get_priority(member, &pri);
bool enable = member_may_enable__(member);
/* Check if partner MAC address is the same as on the working
* interface. Activate member only if the MAC is the same, or
* there is no working interface. */
if (!lead_current || (lead_current
&& eth_addr_equals(member->partner.sys_id,
lead_current->partner.sys_id))) {
member->attached = true;
}
if (member->attached &&
(!lead
|| enable > lead_enable
|| (enable == lead_enable
&& memcmp(&pri, &lead_pri, sizeof pri) < 0))) {
lead = member;
lead_enable = enable;
lead_pri = pri;
}
}
lacp->negotiated = lead != NULL;
if (lead) {
HMAP_FOR_EACH (member, node, &lacp->members) {
if ((lacp->fallback_ab && member->status == LACP_DEFAULTED)
|| lead->partner.key != member->partner.key
|| !eth_addr_equals(lead->partner.sys_id,
member->partner.sys_id)) {
member->attached = false;
}
}
}
}
static void
member_destroy(struct member *member) OVS_REQUIRES(mutex)
{
if (member) {
struct lacp *lacp = member->lacp;
lacp->update = true;
hmap_remove(&lacp->members, &member->node);
if (lacp->key_member == member) {
struct hmap_node *member_node = hmap_first(&lacp->members);
if (member_node) {
lacp->key_member = CONTAINER_OF(member_node, struct member,
node);
} else {
lacp->key_member = NULL;
}
}
free(member->name);
free(member);
}
}
static void
member_set_defaulted(struct member *member) OVS_REQUIRES(mutex)
{
memset(&member->partner, 0, sizeof member->partner);
member->lacp->update = true;
member->status = LACP_DEFAULTED;
}
static void
member_set_expired(struct member *member) OVS_REQUIRES(mutex)
{
member->status = LACP_EXPIRED;
member->partner.state |= LACP_STATE_TIME;
member->partner.state &= ~LACP_STATE_SYNC;
timer_set_duration(&member->rx, LACP_RX_MULTIPLIER * LACP_FAST_TIME_TX);
}
static void
member_get_actor(struct member *member, struct lacp_info *actor)
OVS_REQUIRES(mutex)
{
struct lacp *lacp = member->lacp;
uint16_t key;
uint8_t state = 0;
if (lacp->active) {
state |= LACP_STATE_ACT;
}
if (lacp->fast) {
state |= LACP_STATE_TIME;
}
if (member->attached) {
state |= LACP_STATE_SYNC;
}
if (member->status == LACP_DEFAULTED) {
state |= LACP_STATE_DEF;
}
if (member->status == LACP_EXPIRED) {
state |= LACP_STATE_EXP;
}
if (hmap_count(&lacp->members) > 1) {
state |= LACP_STATE_AGG;
}
if (member->attached || !lacp->negotiated) {
state |= LACP_STATE_COL | LACP_STATE_DIST;
}
key = lacp->key_member->key;
if (!key) {
key = lacp->key_member->port_id;
}
actor->state = state;
actor->key = htons(key);
actor->port_priority = htons(member->port_priority);
actor->port_id = htons(member->port_id);
actor->sys_priority = htons(lacp->sys_priority);
actor->sys_id = lacp->sys_id;
}
/* Given 'member', 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
member_get_priority(struct member *member, struct lacp_info *priority)
OVS_REQUIRES(mutex)
{
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 = member->lacp->sys_priority;
partner_priority = ntohs(member->partner.sys_priority);
if (actor_priority < partner_priority) {
member_get_actor(member, priority);
} else if (partner_priority < actor_priority) {
*priority = member->partner;
} else if (eth_addr_compare_3way(member->lacp->sys_id,
member->partner.sys_id) < 0) {
member_get_actor(member, priority);
} else {
*priority = member->partner;
}
/* Key and state are not used in priority comparisons. */
priority->key = 0;
priority->state = 0;
}
static bool
member_may_tx(const struct member *member) OVS_REQUIRES(mutex)
{
/* Check for L1 state as well as LACP state. */
return (member->carrier_up) && ((member->lacp->active) ||
(member->status != LACP_DEFAULTED));
}
static struct member *
member_lookup(const struct lacp *lacp, const void *member_) OVS_REQUIRES(mutex)
{
struct member *member;
HMAP_FOR_EACH_IN_BUCKET (member, node, hash_pointer(member_, 0),
&lacp->members) {
if (member->aux == member_) {
return member;
}
}
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) OVS_REQUIRES(mutex)
{
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) OVS_REQUIRES(mutex)
{
struct shash member_shash = SHASH_INITIALIZER(&member_shash);
const struct shash_node **sorted_members = NULL;
struct member *member;
int i;
ds_put_format(ds, "---- %s ----\n", lacp->name);
ds_put_format(ds, " status: %s", lacp->active ? "active" : "passive");
if (lacp->negotiated) {
ds_put_cstr(ds, " negotiated");
}
ds_put_cstr(ds, "\n");
ds_put_format(ds, " sys_id: " ETH_ADDR_FMT "\n", ETH_ADDR_ARGS(lacp->sys_id));
ds_put_format(ds, " sys_priority: %u\n", lacp->sys_priority);
ds_put_cstr(ds, " aggregation key: ");
if (lacp->key_member) {
ds_put_format(ds, "%u", lacp->key_member->key
? lacp->key_member->key
: lacp->key_member->port_id);
} else {
ds_put_cstr(ds, "none");
}
ds_put_cstr(ds, "\n");
ds_put_cstr(ds, " lacp_time: ");
if (lacp->fast) {
ds_put_cstr(ds, "fast\n");
} else {
ds_put_cstr(ds, "slow\n");
}
HMAP_FOR_EACH (member, node, &lacp->members) {
shash_add(&member_shash, member->name, member);
}
sorted_members = shash_sort(&member_shash);
for (i = 0; i < shash_count(&member_shash); i++) {
char *status;
struct lacp_info actor;
member = sorted_members[i]->data;
member_get_actor(member, &actor);
switch (member->status) {
case LACP_CURRENT:
status = "current";
break;
case LACP_EXPIRED:
status = "expired";
break;
case LACP_DEFAULTED:
status = "defaulted";
break;
default:
OVS_NOT_REACHED();
}
ds_put_format(ds, "\nmember: %s: %s %s\n", member->name, status,
member->attached ? "attached" : "detached");
ds_put_format(ds, " port_id: %u\n", member->port_id);
ds_put_format(ds, " port_priority: %u\n", member->port_priority);
ds_put_format(ds, " may_enable: %s\n", (member_may_enable__(member)
? "true" : "false"));
ds_put_format(ds, "\n actor sys_id: " ETH_ADDR_FMT "\n",
ETH_ADDR_ARGS(actor.sys_id));
ds_put_format(ds, " actor sys_priority: %u\n",
ntohs(actor.sys_priority));
ds_put_format(ds, " actor port_id: %u\n",
ntohs(actor.port_id));
ds_put_format(ds, " actor port_priority: %u\n",
ntohs(actor.port_priority));
ds_put_format(ds, " actor key: %u\n",
ntohs(actor.key));
ds_put_cstr(ds, " actor state:");
ds_put_lacp_state(ds, actor.state);
ds_put_cstr(ds, "\n\n");
ds_put_format(ds, " partner sys_id: " ETH_ADDR_FMT "\n",
ETH_ADDR_ARGS(member->partner.sys_id));
ds_put_format(ds, " partner sys_priority: %u\n",
ntohs(member->partner.sys_priority));
ds_put_format(ds, " partner port_id: %u\n",
ntohs(member->partner.port_id));
ds_put_format(ds, " partner port_priority: %u\n",
ntohs(member->partner.port_priority));
ds_put_format(ds, " partner key: %u\n",
ntohs(member->partner.key));
ds_put_cstr(ds, " partner state:");
ds_put_lacp_state(ds, member->partner.state);
ds_put_cstr(ds, "\n");
}
shash_destroy(&member_shash);
free(sorted_members);
}
static void
lacp_print_stats(struct ds *ds, struct lacp *lacp) OVS_REQUIRES(mutex)
{
struct shash member_shash = SHASH_INITIALIZER(&member_shash);
const struct shash_node **sorted_members = NULL;
struct member *member;
int i;
ds_put_format(ds, "---- %s statistics ----\n", lacp->name);
HMAP_FOR_EACH (member, node, &lacp->members) {
shash_add(&member_shash, member->name, member);
}
sorted_members = shash_sort(&member_shash);
for (i = 0; i < shash_count(&member_shash); i++) {
member = sorted_members[i]->data;
ds_put_format(ds, "\nmember: %s:\n", member->name);
ds_put_format(ds, " TX PDUs: %u\n", member->count_tx_pdus);
ds_put_format(ds, " RX PDUs: %u\n", member->count_rx_pdus);
ds_put_format(ds, " RX Bad PDUs: %u\n", member->count_rx_pdus_bad);
ds_put_format(ds, " RX Marker Request PDUs: %u\n",
member->count_rx_pdus_marker);
ds_put_format(ds, " Link Expired: %u\n",
member->count_link_expired);
ds_put_format(ds, " Link Defaulted: %u\n",
member->count_link_defaulted);
ds_put_format(ds, " Carrier Status Changed: %u\n",
member->count_carrier_changed);
}
shash_destroy(&member_shash);
free(sorted_members);
}
static void
lacp_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[],
void *aux OVS_UNUSED) OVS_EXCLUDED(mutex)
{
struct ds ds = DS_EMPTY_INITIALIZER;
struct lacp *lacp;
lacp_lock();
if (argc > 1) {
lacp = lacp_find(argv[1]);
if (!lacp) {
unixctl_command_reply_error(conn, "no such lacp object");
goto out;
}
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);
out:
lacp_unlock();
}
static void
lacp_unixctl_show_stats(struct unixctl_conn *conn,
int argc,
const char *argv[],
void *aux OVS_UNUSED) OVS_EXCLUDED(mutex)
{
struct ds ds = DS_EMPTY_INITIALIZER;
struct lacp *lacp;
lacp_lock();
if (argc > 1) {
lacp = lacp_find(argv[1]);
if (!lacp) {
unixctl_command_reply_error(conn, "no such lacp object");
goto out;
}
lacp_print_stats(&ds, lacp);
} else {
LIST_FOR_EACH (lacp, node, all_lacps) {
lacp_print_stats(&ds, lacp);
}
}
unixctl_command_reply(conn, ds_cstr(&ds));
ds_destroy(&ds);
out:
lacp_unlock();
}
/* Extract a snapshot of the current state and counters for a member port.
Return false if the member is not active. */
bool
lacp_get_member_stats(const struct lacp *lacp, const void *member_,
struct lacp_member_stats *stats)
OVS_EXCLUDED(mutex)
{
struct member *member;
struct lacp_info actor;
bool ret;
ovs_mutex_lock(&mutex);
member = member_lookup(lacp, member_);
if (member) {
ret = true;
member_get_actor(member, &actor);
stats->dot3adAggPortActorSystemID = actor.sys_id;
stats->dot3adAggPortPartnerOperSystemID = member->partner.sys_id;
stats->dot3adAggPortAttachedAggID = (lacp->key_member->key ?
lacp->key_member->key :
lacp->key_member->port_id);
/* Construct my admin-state. Assume aggregation is configured on. */
stats->dot3adAggPortActorAdminState = LACP_STATE_AGG;
if (lacp->active) {
stats->dot3adAggPortActorAdminState |= LACP_STATE_ACT;
}
if (lacp->fast) {
stats->dot3adAggPortActorAdminState |= LACP_STATE_TIME;
}
/* XXX Not sure how to know the partner admin state. It
* might have to be captured and remembered during the
* negotiation phase.
*/
stats->dot3adAggPortPartnerAdminState = 0;
stats->dot3adAggPortActorOperState = actor.state;
stats->dot3adAggPortPartnerOperState = member->partner.state;
/* Read out the latest counters */
stats->dot3adAggPortStatsLACPDUsRx = member->count_rx_pdus;
stats->dot3adAggPortStatsIllegalRx = member->count_rx_pdus_bad;
stats->dot3adAggPortStatsLACPDUsTx = member->count_tx_pdus;
} else {
ret = false;
}
ovs_mutex_unlock(&mutex);
return ret;
}
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