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src/sys/net/trunklacp.c

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/* $OpenBSD: trunklacp.c,v 1.32 2019/10/02 22:31:08 dlg Exp $ */
/* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */
/* $FreeBSD:ieee8023ad_lacp.c,v 1.15 2008/03/16 19:25:30 thompsa Exp $ */
/*
* Copyright (c)2005 YAMAMOTO Takashi,
* Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <sys/queue.h>
#include <sys/task.h>
#include <sys/timeout.h>
#include <crypto/siphash.h>
#include <net/if.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net/if_trunk.h>
#include <net/trunklacp.h>
const u_int8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
const struct tlv_template lacp_info_tlv_template[] = {
{ LACP_TYPE_ACTORINFO,
sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
{ LACP_TYPE_PARTNERINFO,
sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
{ LACP_TYPE_COLLECTORINFO,
sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
{ 0, 0 },
};
const struct tlv_template marker_info_tlv_template[] = {
{ MARKER_TYPE_INFO,
sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
{ 0, 0 },
};
const struct tlv_template marker_response_tlv_template[] = {
{ MARKER_TYPE_RESPONSE,
sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
{ 0, 0 },
};
typedef void (*lacp_timer_func_t)(struct lacp_port *);
void lacp_default_partner(struct lacp_softc *,
struct lacp_peerinfo *);
void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
void lacp_fill_markerinfo(struct lacp_port *,
struct lacp_markerinfo *);
u_int64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
void lacp_suppress_distributing(struct lacp_softc *,
struct lacp_aggregator *);
void lacp_transit_expire(void *);
void lacp_update_portmap(struct lacp_softc *);
void lacp_select_active_aggregator(struct lacp_softc *);
u_int16_t lacp_compose_key(struct lacp_port *);
int tlv_check(const void *, size_t, const struct tlvhdr *,
const struct tlv_template *, int);
void lacp_tick(void *);
void lacp_fill_aggregator_id(struct lacp_aggregator *,
const struct lacp_port *);
void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
const struct lacp_peerinfo *);
int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
const struct lacp_port *);
int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
const struct lacp_peerinfo *);
struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
struct lacp_port *);
void lacp_aggregator_addref(struct lacp_softc *,
struct lacp_aggregator *);
void lacp_aggregator_delref(struct lacp_softc *,
struct lacp_aggregator *);
/* receive machine */
void lacp_input_process(void *);
int lacp_pdu_input(struct lacp_port *, struct mbuf *);
int lacp_marker_input(struct lacp_port *, struct mbuf *);
void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
void lacp_sm_rx_timer(struct lacp_port *);
void lacp_sm_rx_set_expired(struct lacp_port *);
void lacp_sm_rx_update_ntt(struct lacp_port *,
const struct lacpdu *);
void lacp_sm_rx_record_pdu(struct lacp_port *,
const struct lacpdu *);
void lacp_sm_rx_update_selected(struct lacp_port *,
const struct lacpdu *);
void lacp_sm_rx_record_default(struct lacp_port *);
void lacp_sm_rx_update_default_selected(struct lacp_port *);
void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
const struct lacp_peerinfo *);
/* mux machine */
void lacp_sm_mux(struct lacp_port *);
void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
void lacp_sm_mux_timer(struct lacp_port *);
/* periodic transmit machine */
void lacp_sm_ptx_update_timeout(struct lacp_port *, u_int8_t);
void lacp_sm_ptx_tx_schedule(struct lacp_port *);
void lacp_sm_ptx_timer(struct lacp_port *);
/* transmit machine */
void lacp_sm_tx(struct lacp_port *);
void lacp_sm_assert_ntt(struct lacp_port *);
void lacp_run_timers(struct lacp_port *);
int lacp_compare_peerinfo(const struct lacp_peerinfo *,
const struct lacp_peerinfo *);
int lacp_compare_systemid(const struct lacp_systemid *,
const struct lacp_systemid *);
void lacp_port_enable(struct lacp_port *);
void lacp_port_disable(struct lacp_port *);
void lacp_select(struct lacp_port *);
void lacp_unselect(struct lacp_port *);
void lacp_disable_collecting(struct lacp_port *);
void lacp_enable_collecting(struct lacp_port *);
void lacp_disable_distributing(struct lacp_port *);
void lacp_enable_distributing(struct lacp_port *);
int lacp_xmit_lacpdu(struct lacp_port *);
int lacp_xmit_marker(struct lacp_port *);
#if defined(LACP_DEBUG)
void lacp_dump_lacpdu(const struct lacpdu *);
const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
size_t);
const char *lacp_format_lagid(const struct lacp_peerinfo *,
const struct lacp_peerinfo *, char *, size_t);
const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
char *, size_t);
const char *lacp_format_state(u_int8_t, char *, size_t);
const char *lacp_format_mac(const u_int8_t *, char *, size_t);
const char *lacp_format_systemid(const struct lacp_systemid *, char *,
size_t);
const char *lacp_format_portid(const struct lacp_portid *, char *,
size_t);
void lacp_dprintf(const struct lacp_port *, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
#define LACP_DPRINTF(a) lacp_dprintf a
#else
#define LACP_DPRINTF(a) /* nothing */
#endif
const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
[LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
[LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
[LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
};
void
lacp_default_partner(struct lacp_softc *lsc, struct lacp_peerinfo *peer)
{
peer->lip_systemid.lsi_prio = lsc->lsc_sys_prio;
peer->lip_key = 0;
peer->lip_portid.lpi_prio = lsc->lsc_port_prio;
peer->lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING;
}
int
lacp_input(struct trunk_port *tp, struct mbuf *m)
{
struct lacp_port *lp = LACP_PORT(tp);
struct lacp_softc *lsc = lp->lp_lsc;
struct lacp_aggregator *la = lp->lp_aggregator;
struct ether_header *eh;
u_int8_t subtype;
eh = mtod(m, struct ether_header *);
if (ntohs(eh->ether_type) == ETHERTYPE_SLOW) {
if (m->m_pkthdr.len < (sizeof(*eh) + sizeof(subtype)))
return (-1);
m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype);
switch (subtype) {
case SLOWPROTOCOLS_SUBTYPE_LACP:
case SLOWPROTOCOLS_SUBTYPE_MARKER:
mq_enqueue(&lp->lp_mq, m);
task_add(systq, &lsc->lsc_input);
return (1);
}
}
/*
* If the port is not collecting or not in the active aggregator then
* free and return.
*/
/* This port is joined to the active aggregator */
if ((lp->lp_state & LACP_STATE_COLLECTING) == 0 ||
la == NULL || la != lsc->lsc_active_aggregator) {
m_freem(m);
return (-1);
}
/* Not a subtype we are interested in */
return (0);
}
void
lacp_input_process(void *arg)
{
struct lacp_softc *lsc = arg;
struct lacp_port *lp;
struct mbuf *m;
u_int8_t subtype;
LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
while ((m = mq_dequeue(&lp->lp_mq)) != NULL) {
m_copydata(m, sizeof(struct ether_header),
sizeof(subtype), &subtype);
switch (subtype) {
case SLOWPROTOCOLS_SUBTYPE_LACP:
lacp_pdu_input(lp, m);
break;
case SLOWPROTOCOLS_SUBTYPE_MARKER:
lacp_marker_input(lp, m);
break;
}
}
}
}
/*
* lacp_pdu_input: process lacpdu
*/
int
lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
{
struct lacpdu *du;
int error = 0;
if (m->m_pkthdr.len != sizeof(*du))
goto bad;
if (m->m_len < sizeof(*du)) {
m = m_pullup(m, sizeof(*du));
if (m == NULL)
return (ENOMEM);
}
du = mtod(m, struct lacpdu *);
if (memcmp(&du->ldu_eh.ether_dhost,
&ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN))
goto bad;
/*
* ignore the version for compatibility with
* the future protocol revisions.
*/
#if 0
if (du->ldu_sph.sph_version != 1)
goto bad;
#endif
/*
* ignore tlv types for compatibility with the
* future protocol revisions. (IEEE 802.3-2005 43.4.12)
*/
if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
lacp_info_tlv_template, 0))
goto bad;
#if defined(LACP_DEBUG)
LACP_DPRINTF((lp, "lacpdu receive\n"));
lacp_dump_lacpdu(du);
#endif /* defined(LACP_DEBUG) */
lacp_sm_rx(lp, du);
m_freem(m);
return (error);
bad:
m_freem(m);
return (EINVAL);
}
void
lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct trunk_port *tp = lp->lp_trunk;
struct trunk_softc *sc = tp->tp_trunk;
info->lip_systemid.lsi_prio = htons(lsc->lsc_sys_prio);
memcpy(&info->lip_systemid.lsi_mac,
sc->tr_ac.ac_enaddr, ETHER_ADDR_LEN);
info->lip_portid.lpi_prio = htons(lsc->lsc_port_prio);
info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
info->lip_state = lp->lp_state;
}
void
lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
{
struct ifnet *ifp = lp->lp_ifp;
/* Fill in the port index and system id (encoded as the MAC) */
info->mi_rq_port = htons(ifp->if_index);
memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
info->mi_rq_xid = htonl(0);
}
int
lacp_xmit_lacpdu(struct lacp_port *lp)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct trunk_port *tp = lp->lp_trunk;
struct mbuf *m;
struct lacpdu *du;
int error;
m = m_gethdr(M_DONTWAIT, MT_DATA);
if (m == NULL)
return (ENOMEM);
m->m_len = m->m_pkthdr.len = sizeof(*du);
m->m_pkthdr.pf.prio = lsc->lsc_ifq_prio;
du = mtod(m, struct lacpdu *);
memset(du, 0, sizeof(*du));
memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
ETHER_ADDR_LEN);
memcpy(&du->ldu_eh.ether_shost, tp->tp_lladdr, ETHER_ADDR_LEN);
du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
du->ldu_sph.sph_version = 1;
TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
du->ldu_actor = lp->lp_actor;
TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
sizeof(du->ldu_partner));
du->ldu_partner = lp->lp_partner;
TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
sizeof(du->ldu_collector));
du->ldu_collector.lci_maxdelay = 0;
#if defined(LACP_DEBUG)
LACP_DPRINTF((lp, "lacpdu transmit\n"));
lacp_dump_lacpdu(du);
#endif /* defined(LACP_DEBUG) */
m->m_flags |= M_MCAST;
/*
* XXX should use higher priority queue.
* otherwise network congestion can break aggregation.
*/
error = if_enqueue(lp->lp_ifp, m);
return (error);
}
int
lacp_xmit_marker(struct lacp_port *lp)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct trunk_port *tp = lp->lp_trunk;
struct mbuf *m;
struct markerdu *mdu;
int error;
m = m_gethdr(M_DONTWAIT, MT_DATA);
if (m == NULL)
return (ENOMEM);
m->m_len = m->m_pkthdr.len = sizeof(*mdu);
m->m_pkthdr.pf.prio = lsc->lsc_ifq_prio;
mdu = mtod(m, struct markerdu *);
memset(mdu, 0, sizeof(*mdu));
memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
ETHER_ADDR_LEN);
memcpy(&mdu->mdu_eh.ether_shost, tp->tp_lladdr, ETHER_ADDR_LEN);
mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
mdu->mdu_sph.sph_version = 1;
/* Bump the transaction id and copy over the marker info */
lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
mdu->mdu_info = lp->lp_marker;
LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%s, id=%u\n",
ntohs(mdu->mdu_info.mi_rq_port),
ether_sprintf(mdu->mdu_info.mi_rq_system),
ntohl(mdu->mdu_info.mi_rq_xid)));
m->m_flags |= M_MCAST;
error = if_enqueue(lp->lp_ifp, m);
return (error);
}
void
lacp_linkstate(struct trunk_port *tp)
{
struct lacp_port *lp = LACP_PORT(tp);
u_int8_t old_state;
u_int16_t old_key;
old_state = lp->lp_state;
old_key = lp->lp_key;
/*
* If the port is not an active full duplex Ethernet link then it can
* not be aggregated.
*/
if (tp->tp_link_state == LINK_STATE_UNKNOWN ||
tp->tp_link_state == LINK_STATE_FULL_DUPLEX)
lacp_port_enable(lp);
else
lacp_port_disable(lp);
lp->lp_key = lacp_compose_key(lp);
if (old_state != lp->lp_state || old_key != lp->lp_key) {
LACP_DPRINTF((lp, "-> UNSELECTED\n"));
lp->lp_selected = LACP_UNSELECTED;
}
}
void
lacp_tick(void *arg)
{
struct lacp_softc *lsc = arg;
struct lacp_port *lp;
LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
continue;
lacp_run_timers(lp);
lacp_select(lp);
lacp_sm_mux(lp);
lacp_sm_tx(lp);
lacp_sm_ptx_tx_schedule(lp);
}
timeout_add_sec(&lsc->lsc_callout, 1);
}
int
lacp_port_create(struct trunk_port *tp)
{
struct trunk_softc *sc = tp->tp_trunk;
struct lacp_softc *lsc = LACP_SOFTC(sc);
struct lacp_port *lp;
struct ifnet *ifp = tp->tp_if;
struct ifreq ifr;
int error;
bzero(&ifr, sizeof(ifr));
ifr.ifr_addr.sa_family = AF_UNSPEC;
ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;
bcopy(&ethermulticastaddr_slowprotocols,
ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);
error = ether_addmulti(&ifr, (struct arpcom *)ifp);
if (error && error != ENETRESET) {
printf("%s: ADDMULTI failed on %s\n", __func__, tp->tp_ifname);
return (error);
}
lp = malloc(sizeof(struct lacp_port),
M_DEVBUF, M_NOWAIT|M_ZERO);
if (lp == NULL)
return (ENOMEM);
tp->tp_psc = (caddr_t)lp;
lp->lp_ifp = ifp;
lp->lp_trunk = tp;
lp->lp_lsc = lsc;
mq_init(&lp->lp_mq, 8, IPL_NET);
LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
lacp_fill_actorinfo(lp, &lp->lp_actor);
lacp_fill_markerinfo(lp, &lp->lp_marker);
lp->lp_state =
(lsc->lsc_mode ? LACP_STATE_ACTIVITY : 0) |
(lsc->lsc_timeout ? LACP_STATE_TIMEOUT : 0);
lp->lp_aggregator = NULL;
lacp_sm_rx_set_expired(lp);
lacp_linkstate(tp);
return (0);
}
void
lacp_port_destroy(struct trunk_port *tp)
{
struct lacp_port *lp = LACP_PORT(tp);
struct mbuf *m;
int i;
for (i = 0; i < LACP_NTIMER; i++)
LACP_TIMER_DISARM(lp, i);
lacp_disable_collecting(lp);
lacp_disable_distributing(lp);
lacp_unselect(lp);
LIST_REMOVE(lp, lp_next);
while ((m = mq_dequeue(&lp->lp_mq)) != NULL)
m_freem(m);
free(lp, M_DEVBUF, sizeof(*lp));
}
void
lacp_req(struct trunk_softc *sc, caddr_t data)
{
struct lacp_opreq *req = (struct lacp_opreq *)data;
struct lacp_softc *lsc = LACP_SOFTC(sc);
struct lacp_aggregator *la = lsc->lsc_active_aggregator;
bzero(req, sizeof(struct lacp_opreq));
if (la != NULL) {
req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
ETHER_ADDR_LEN);
req->actor_key = ntohs(la->la_actor.lip_key);
req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
req->actor_state = la->la_actor.lip_state;
req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
ETHER_ADDR_LEN);
req->partner_key = ntohs(la->la_partner.lip_key);
req->partner_portprio =
ntohs(la->la_partner.lip_portid.lpi_prio);
req->partner_portno =
ntohs(la->la_partner.lip_portid.lpi_portno);
req->partner_state = la->la_partner.lip_state;
}
}
u_int
lacp_port_status(struct trunk_port *lgp)
{
struct lacp_port *lp = LACP_PORT(lgp);
struct lacp_softc *lsc = lp->lp_lsc;
struct lacp_aggregator *la = lp->lp_aggregator;
u_int flags = 0;
/* This port is joined to the active aggregator */
if (la != NULL && la == lsc->lsc_active_aggregator)
flags |= TRUNK_PORT_ACTIVE;
if (lp->lp_state & LACP_STATE_COLLECTING)
flags |= TRUNK_PORT_COLLECTING;
if (lp->lp_state & LACP_STATE_DISTRIBUTING)
flags |= TRUNK_PORT_DISTRIBUTING;
return (flags);
}
void
lacp_portreq(struct trunk_port *tp, caddr_t data)
{
struct lacp_opreq *req = (struct lacp_opreq *)data;
struct lacp_port *lp = LACP_PORT(tp);
req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
ETHER_ADDR_LEN);
req->actor_key = ntohs(lp->lp_actor.lip_key);
req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
req->actor_state = lp->lp_actor.lip_state;
req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
ETHER_ADDR_LEN);
req->partner_key = ntohs(lp->lp_partner.lip_key);
req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
req->partner_state = lp->lp_partner.lip_state;
}
void
lacp_disable_collecting(struct lacp_port *lp)
{
LACP_DPRINTF((lp, "collecting disabled\n"));
lp->lp_state &= ~LACP_STATE_COLLECTING;
}
void
lacp_enable_collecting(struct lacp_port *lp)
{
LACP_DPRINTF((lp, "collecting enabled\n"));
lp->lp_state |= LACP_STATE_COLLECTING;
}
void
lacp_disable_distributing(struct lacp_port *lp)
{
struct lacp_aggregator *la = lp->lp_aggregator;
struct lacp_softc *lsc = lp->lp_lsc;
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif /* defined(LACP_DEBUG) */
if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0)
return;
KASSERT(!TAILQ_EMPTY(&la->la_ports));
KASSERT(la->la_nports > 0);
KASSERT(la->la_refcnt >= la->la_nports);
LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
"nports %d -> %d\n",
lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
la->la_nports, la->la_nports - 1));
TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
la->la_nports--;
if (lsc->lsc_active_aggregator == la) {
lacp_suppress_distributing(lsc, la);
lacp_select_active_aggregator(lsc);
/* regenerate the port map, the active aggregator has changed */
lacp_update_portmap(lsc);
}
lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
}
void
lacp_enable_distributing(struct lacp_port *lp)
{
struct lacp_aggregator *la = lp->lp_aggregator;
struct lacp_softc *lsc = lp->lp_lsc;
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif /* defined(LACP_DEBUG) */
if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0)
return;
LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
"nports %d -> %d\n",
lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
la->la_nports, la->la_nports + 1));
KASSERT(la->la_refcnt > la->la_nports);
TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
la->la_nports++;
lp->lp_state |= LACP_STATE_DISTRIBUTING;
if (lsc->lsc_active_aggregator == la) {
lacp_suppress_distributing(lsc, la);
lacp_update_portmap(lsc);
} else
/* try to become the active aggregator */
lacp_select_active_aggregator(lsc);
}
void
lacp_transit_expire(void *vp)
{
struct lacp_softc *lsc = vp;
LACP_DPRINTF((NULL, "%s\n", __func__));
lsc->lsc_suppress_distributing = 0;
}
int
lacp_attach(struct trunk_softc *sc)
{
struct lacp_softc *lsc;
lsc = malloc(sizeof(struct lacp_softc),
M_DEVBUF, M_NOWAIT|M_ZERO);
if (lsc == NULL)
return (ENOMEM);
sc->tr_psc = (caddr_t)lsc;
lsc->lsc_softc = sc;
arc4random_buf(&lsc->lsc_hashkey, sizeof(lsc->lsc_hashkey));
lsc->lsc_active_aggregator = NULL;
TAILQ_INIT(&lsc->lsc_aggregators);
LIST_INIT(&lsc->lsc_ports);
/* set default admin values */
lsc->lsc_mode = LACP_DEFAULT_MODE;
lsc->lsc_timeout = LACP_DEFAULT_TIMEOUT;
lsc->lsc_sys_prio = LACP_DEFAULT_SYSTEM_PRIO;
lsc->lsc_port_prio = LACP_DEFAULT_PORT_PRIO;
lsc->lsc_ifq_prio = LACP_DEFAULT_IFQ_PRIO;
timeout_set(&lsc->lsc_transit_callout, lacp_transit_expire, lsc);
timeout_set(&lsc->lsc_callout, lacp_tick, lsc);
task_set(&lsc->lsc_input, lacp_input_process, lsc);
/* if the trunk is already up then do the same */
if (sc->tr_ac.ac_if.if_flags & IFF_RUNNING)
lacp_init(sc);
return (0);
}
int
lacp_detach(struct trunk_softc *sc)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators));
KASSERT(lsc->lsc_active_aggregator == NULL);
sc->tr_psc = NULL;
timeout_del(&lsc->lsc_transit_callout);
timeout_del(&lsc->lsc_callout);
free(lsc, M_DEVBUF, sizeof(*lsc));
return (0);
}
void
lacp_init(struct trunk_softc *sc)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
timeout_add_sec(&lsc->lsc_callout, 1);
}
void
lacp_stop(struct trunk_softc *sc)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
timeout_del(&lsc->lsc_transit_callout);
timeout_del(&lsc->lsc_callout);
}
struct trunk_port *
lacp_select_tx_port(struct trunk_softc *sc, struct mbuf *m)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
struct lacp_portmap *pm;
struct lacp_port *lp;
u_int32_t hash;
if (__predict_false(lsc->lsc_suppress_distributing)) {
LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
return (NULL);
}
pm = &lsc->lsc_pmap[lsc->lsc_activemap];
if (pm->pm_count == 0) {
LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
return (NULL);
}
hash = trunk_hashmbuf(m, &lsc->lsc_hashkey);
hash %= pm->pm_count;
lp = pm->pm_map[hash];
KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0);
return (lp->lp_trunk);
}
/*
* lacp_suppress_distributing: drop transmit packets for a while
* to preserve packet ordering.
*/
void
lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
{
struct lacp_port *lp;
if (lsc->lsc_active_aggregator != la)
return;
LACP_DPRINTF((NULL, "%s\n", __func__));
lsc->lsc_suppress_distributing = 1;
/* send a marker frame down each port to verify the queues are empty */
LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
lp->lp_flags |= LACP_PORT_MARK;
lacp_xmit_marker(lp);
}
/* set a timeout for the marker frames */
timeout_add_msec(&lsc->lsc_transit_callout, LACP_TRANSIT_DELAY);
}
int
lacp_compare_peerinfo(const struct lacp_peerinfo *a,
const struct lacp_peerinfo *b)
{
return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
}
int
lacp_compare_systemid(const struct lacp_systemid *a,
const struct lacp_systemid *b)
{
return (memcmp(a, b, sizeof(*a)));
}
#if 0 /* unused */
int
lacp_compare_portid(const struct lacp_portid *a,
const struct lacp_portid *b)
{
return (memcmp(a, b, sizeof(*a)));
}
#endif
u_int64_t
lacp_aggregator_bandwidth(struct lacp_aggregator *la)
{
struct lacp_port *lp;
u_int64_t speed;
lp = TAILQ_FIRST(&la->la_ports);
if (lp == NULL)
return (0);
speed = lp->lp_ifp->if_baudrate;
speed *= la->la_nports;
if (speed == 0) {
LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
lp->lp_media, la->la_nports));
}
return (speed);
}
/*
* lacp_select_active_aggregator: select an aggregator to be used to transmit
* packets from trunk(4) interface.
*/
void
lacp_select_active_aggregator(struct lacp_softc *lsc)
{
struct lacp_aggregator *la;
struct lacp_aggregator *best_la = NULL;
u_int64_t best_speed = 0;
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif /* defined(LACP_DEBUG) */
LACP_DPRINTF((NULL, "%s:\n", __func__));
TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
u_int64_t speed;
if (la->la_nports == 0)
continue;
speed = lacp_aggregator_bandwidth(la);
LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
speed, la->la_nports));
/*
* This aggregator is chosen if
* the partner has a better system priority
* or, the total aggregated speed is higher
* or, it is already the chosen aggregator
*/
if ((best_la == NULL || LACP_SYS_PRI(la->la_partner) <
LACP_SYS_PRI(best_la->la_partner)) ||
speed > best_speed ||
(speed == best_speed &&
la == lsc->lsc_active_aggregator)) {
best_la = la;
best_speed = speed;
}
}
KASSERT(best_la == NULL || best_la->la_nports > 0);
KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports));
#if defined(LACP_DEBUG)
if (lsc->lsc_active_aggregator != best_la) {
LACP_DPRINTF((NULL, "active aggregator changed\n"));
LACP_DPRINTF((NULL, "old %s\n",
lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
buf, sizeof(buf))));
} else
LACP_DPRINTF((NULL, "active aggregator not changed\n"));
LACP_DPRINTF((NULL, "new %s\n",
lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
#endif /* defined(LACP_DEBUG) */
if (lsc->lsc_active_aggregator != best_la) {
lsc->lsc_active_aggregator = best_la;
lacp_update_portmap(lsc);
if (best_la)
lacp_suppress_distributing(lsc, best_la);
}
}
/*
* Updated the inactive portmap array with the new list of ports and
* make it live.
*/
void
lacp_update_portmap(struct lacp_softc *lsc)
{
struct lacp_aggregator *la;
struct lacp_portmap *p;
struct lacp_port *lp;
u_int newmap;
int i;
newmap = lsc->lsc_activemap == 0 ? 1 : 0;
p = &lsc->lsc_pmap[newmap];
la = lsc->lsc_active_aggregator;
bzero(p, sizeof(struct lacp_portmap));
if (la != NULL && la->la_nports > 0) {
p->pm_count = la->la_nports;
i = 0;
TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
p->pm_map[i++] = lp;
KASSERT(i == p->pm_count);
}
/* switch the active portmap over */
lsc->lsc_activemap = newmap;
LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
lsc->lsc_activemap,
lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
}
u_int16_t
lacp_compose_key(struct lacp_port *lp)
{
struct trunk_port *tp = lp->lp_trunk;
struct trunk_softc *sc = tp->tp_trunk;
u_int64_t speed;
u_int16_t key;
if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
/* bit 0..14: (some bits of) if_index of this port */
key = lp->lp_ifp->if_index;
/* non-aggregatable */
key |= 0x8000;
} else {
/* bit 0..2: speed indication */
speed = lp->lp_ifp->if_baudrate;
if (speed == 0)
key = 0;
else if (speed <= IF_Mbps(1))
key = 1;
else if (speed <= IF_Mbps(10))
key = 2;
else if (speed <= IF_Mbps(100))
key = 3;
else if (speed <= IF_Gbps(1))
key = 4;
else if (speed <= IF_Gbps(10))
key = 5;
else if (speed <= IF_Gbps(100))
key = 6;
else
key = 7;
/* bit 3..13: (some bits of) if_index of the trunk device */
key |= sc->tr_ac.ac_if.if_index << 3;
/* bit 14: the port active flag (includes link state) */
if (TRUNK_PORTACTIVE(tp))
key |= 0x4000;
else
key &= ~0x4000;
/* clear the non-aggregatable bit */
key &= ~0x8000;
}
return (htons(key));
}
void
lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
{
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif
LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
__func__,
lacp_format_lagid(&la->la_actor, &la->la_partner,
buf, sizeof(buf)),
la->la_refcnt, la->la_refcnt + 1));
KASSERT(la->la_refcnt > 0);
la->la_refcnt++;
KASSERT(la->la_refcnt > la->la_nports);
}
void
lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
{
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif
LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
__func__,
lacp_format_lagid(&la->la_actor, &la->la_partner,
buf, sizeof(buf)),
la->la_refcnt, la->la_refcnt - 1));
KASSERT(la->la_refcnt > la->la_nports);
la->la_refcnt--;
if (la->la_refcnt > 0)
return;
KASSERT(la->la_refcnt == 0);
KASSERT(lsc->lsc_active_aggregator != la);
TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
free(la, M_DEVBUF, sizeof(*la));
}
/*
* lacp_aggregator_get: allocate an aggregator.
*/
struct lacp_aggregator *
lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
{
struct lacp_aggregator *la;
la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
if (la) {
la->la_refcnt = 1;
la->la_nports = 0;
TAILQ_INIT(&la->la_ports);
la->la_pending = 0;
TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
}
return (la);
}
/*
* lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
*/
void
lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
{
lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
}
void
lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
const struct lacp_peerinfo *lpi_port)
{
memset(lpi_aggr, 0, sizeof(*lpi_aggr));
lpi_aggr->lip_systemid = lpi_port->lip_systemid;
lpi_aggr->lip_key = lpi_port->lip_key;
}
/*
* lacp_aggregator_is_compatible: check if a port can join to an aggregator.
*/
int
lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
const struct lacp_port *lp)
{
if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
!(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION))
return (0);
if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION))
return (0);
if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner))
return (0);
if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor))
return (0);
return (1);
}
int
lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
const struct lacp_peerinfo *b)
{
if (memcmp(&a->lip_systemid, &b->lip_systemid,
sizeof(a->lip_systemid)))
return (0);
if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key)))
return (0);
return (1);
}
void
lacp_port_enable(struct lacp_port *lp)
{
lp->lp_state |= LACP_STATE_AGGREGATION;
}
void
lacp_port_disable(struct lacp_port *lp)
{
lacp_set_mux(lp, LACP_MUX_DETACHED);
lp->lp_state &= ~LACP_STATE_AGGREGATION;
lp->lp_selected = LACP_UNSELECTED;
lacp_sm_rx_record_default(lp);
lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
lp->lp_state &= ~LACP_STATE_EXPIRED;
}
/*
* lacp_select: select an aggregator. create one if necessary.
*/
void
lacp_select(struct lacp_port *lp)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct lacp_aggregator *la;
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif
if (lp->lp_aggregator)
return;
KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE));
LACP_DPRINTF((lp, "port lagid=%s\n",
lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
buf, sizeof(buf))));
TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
if (lacp_aggregator_is_compatible(la, lp))
break;
}
if (la == NULL) {
la = lacp_aggregator_get(lsc, lp);
if (la == NULL) {
LACP_DPRINTF((lp, "aggregator creation failed\n"));
/*
* will retry on the next tick.
*/
return;
}
lacp_fill_aggregator_id(la, lp);
LACP_DPRINTF((lp, "aggregator created\n"));
} else {
LACP_DPRINTF((lp, "compatible aggregator found\n"));
if (la->la_refcnt == LACP_MAX_PORTS)
return;
lacp_aggregator_addref(lsc, la);
}
LACP_DPRINTF((lp, "aggregator lagid=%s\n",
lacp_format_lagid(&la->la_actor, &la->la_partner,
buf, sizeof(buf))));
lp->lp_aggregator = la;
lp->lp_selected = LACP_SELECTED;
}
/*
* lacp_unselect: finish unselect/detach process.
*/
void
lacp_unselect(struct lacp_port *lp)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct lacp_aggregator *la = lp->lp_aggregator;
KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE));
if (la == NULL)
return;
lp->lp_aggregator = NULL;
lacp_aggregator_delref(lsc, la);
}
/* mux machine */
void
lacp_sm_mux(struct lacp_port *lp)
{
enum lacp_mux_state new_state;
int p_sync =
(lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
int p_collecting =
(lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
enum lacp_selected selected = lp->lp_selected;
struct lacp_aggregator *la;
/* LACP_DPRINTF((lp, "%s: state %d\n", __func__, lp->lp_mux_state)); */
re_eval:
la = lp->lp_aggregator;
KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL);
new_state = lp->lp_mux_state;
switch (lp->lp_mux_state) {
case LACP_MUX_DETACHED:
if (selected != LACP_UNSELECTED)
new_state = LACP_MUX_WAITING;
break;
case LACP_MUX_WAITING:
KASSERT(la->la_pending > 0 ||
!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE));
if (selected == LACP_SELECTED && la->la_pending == 0)
new_state = LACP_MUX_ATTACHED;
else if (selected == LACP_UNSELECTED)
new_state = LACP_MUX_DETACHED;
break;
case LACP_MUX_ATTACHED:
if (selected == LACP_SELECTED && p_sync)
new_state = LACP_MUX_COLLECTING;
else if (selected != LACP_SELECTED)
new_state = LACP_MUX_DETACHED;
break;
case LACP_MUX_COLLECTING:
if (selected == LACP_SELECTED && p_sync && p_collecting)
new_state = LACP_MUX_DISTRIBUTING;
else if (selected != LACP_SELECTED || !p_sync)
new_state = LACP_MUX_ATTACHED;
break;
case LACP_MUX_DISTRIBUTING:
if (selected != LACP_SELECTED || !p_sync || !p_collecting)
new_state = LACP_MUX_COLLECTING;
break;
default:
panic("%s: unknown state", __func__);
}
if (lp->lp_mux_state == new_state)
return;
lacp_set_mux(lp, new_state);
goto re_eval;
}
void
lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
{
struct lacp_aggregator *la = lp->lp_aggregator;
if (lp->lp_mux_state == new_state)
return;
switch (new_state) {
case LACP_MUX_DETACHED:
lp->lp_state &= ~LACP_STATE_SYNC;
lacp_disable_distributing(lp);
lacp_disable_collecting(lp);
lacp_sm_assert_ntt(lp);
/* cancel timer */
if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
KASSERT(la->la_pending > 0);
la->la_pending--;
}
LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
lacp_unselect(lp);
break;
case LACP_MUX_WAITING:
LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
LACP_AGGREGATE_WAIT_TIME);
la->la_pending++;
break;
case LACP_MUX_ATTACHED:
lp->lp_state |= LACP_STATE_SYNC;
lacp_disable_collecting(lp);
lacp_sm_assert_ntt(lp);
break;
case LACP_MUX_COLLECTING:
lacp_enable_collecting(lp);
lacp_disable_distributing(lp);
lacp_sm_assert_ntt(lp);
break;
case LACP_MUX_DISTRIBUTING:
lacp_enable_distributing(lp);
break;
default:
panic("%s: unknown state", __func__);
}
LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
lp->lp_mux_state = new_state;
}
void
lacp_sm_mux_timer(struct lacp_port *lp)
{
struct lacp_aggregator *la = lp->lp_aggregator;
#if defined(LACP_DEBUG)
char buf[LACP_LAGIDSTR_MAX+1];
#endif
KASSERT(la->la_pending > 0);
LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
lacp_format_lagid(&la->la_actor, &la->la_partner,
buf, sizeof(buf)),
la->la_pending, la->la_pending - 1));
la->la_pending--;
}
/* periodic transmit machine */
void
lacp_sm_ptx_update_timeout(struct lacp_port *lp, u_int8_t oldpstate)
{
if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
LACP_STATE_TIMEOUT))
return;
LACP_DPRINTF((lp, "partner timeout changed\n"));
/*
* FAST_PERIODIC -> SLOW_PERIODIC
* or
* SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
*
* let lacp_sm_ptx_tx_schedule to update timeout.
*/
LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
/* if timeout has been shortened, assert NTT. */
if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT))
lacp_sm_assert_ntt(lp);
}
void
lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
{
int timeout;
if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
!(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
/* NO_PERIODIC */
LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
return;
}
if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC))
return;
timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
}
void
lacp_sm_ptx_timer(struct lacp_port *lp)
{
lacp_sm_assert_ntt(lp);
}
void
lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
{
int timeout;
/* check LACP_DISABLED first */
if (!(lp->lp_state & LACP_STATE_AGGREGATION))
return;
/* check loopback condition. */
if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
&lp->lp_actor.lip_systemid))
return;
/*
* EXPIRED, DEFAULTED, CURRENT -> CURRENT
*/
lacp_sm_rx_update_selected(lp, du);
lacp_sm_rx_update_ntt(lp, du);
lacp_sm_rx_record_pdu(lp, du);
timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
lp->lp_state &= ~LACP_STATE_EXPIRED;
/* kick transmit machine without waiting the next tick. */
lacp_sm_tx(lp);
}
void
lacp_sm_rx_set_expired(struct lacp_port *lp)
{
lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
lp->lp_state |= LACP_STATE_EXPIRED;
}
void
lacp_sm_rx_timer(struct lacp_port *lp)
{
if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
/* CURRENT -> EXPIRED */
LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
lacp_sm_rx_set_expired(lp);
} else {
/* EXPIRED -> DEFAULTED */
LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
lacp_sm_rx_update_default_selected(lp);
lacp_sm_rx_record_default(lp);
lp->lp_state &= ~LACP_STATE_EXPIRED;
}
}
void
lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
{
int active;
u_int8_t oldpstate;
#if defined(LACP_DEBUG)
char buf[LACP_STATESTR_MAX+1];
#endif
/* LACP_DPRINTF((lp, "%s\n", __func__)); */
oldpstate = lp->lp_partner.lip_state;
active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
|| ((lp->lp_state & LACP_STATE_ACTIVITY) &&
(du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
lp->lp_partner = du->ldu_actor;
if (active &&
((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
LACP_STATE_AGGREGATION) &&
!lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
|| (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
/* XXX nothing? */
} else
lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
lp->lp_state &= ~LACP_STATE_DEFAULTED;
if (oldpstate != lp->lp_partner.lip_state) {
LACP_DPRINTF((lp, "old pstate %s\n",
lacp_format_state(oldpstate, buf, sizeof(buf))));
LACP_DPRINTF((lp, "new pstate %s\n",
lacp_format_state(lp->lp_partner.lip_state, buf,
sizeof(buf))));
}
lacp_sm_ptx_update_timeout(lp, oldpstate);
}
void
lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
{
/* LACP_DPRINTF((lp, "%s\n", __func__)); */
if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
!LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
lacp_sm_assert_ntt(lp);
}
}
void
lacp_sm_rx_record_default(struct lacp_port *lp)
{
struct lacp_softc *lsc;
u_int8_t oldpstate;
lsc = lp->lp_lsc;
/* LACP_DPRINTF((lp, "%s\n", __func__)); */
oldpstate = lp->lp_partner.lip_state;
lacp_default_partner(lsc, &(lp->lp_partner));
lp->lp_state |= LACP_STATE_DEFAULTED;
lacp_sm_ptx_update_timeout(lp, oldpstate);
}
void
lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
const struct lacp_peerinfo *info)
{
/* LACP_DPRINTF((lp, "%s\n", __func__)); */
if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
!LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
LACP_STATE_AGGREGATION)) {
lp->lp_selected = LACP_UNSELECTED;
/* mux machine will clean up lp->lp_aggregator */
}
}
void
lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
{
/* LACP_DPRINTF((lp, "%s\n", __func__)); */
lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
}
void
lacp_sm_rx_update_default_selected(struct lacp_port *lp)
{
struct lacp_softc *lsc;
struct lacp_peerinfo peer;
lsc = lp->lp_lsc;
lacp_default_partner(lsc, &peer);
/* LACP_DPRINTF((lp, "%s\n", __func__)); */
lacp_sm_rx_update_selected_from_peerinfo(lp, &peer);
}
/* transmit machine */
void
lacp_sm_tx(struct lacp_port *lp)
{
int error;
if (!(lp->lp_state & LACP_STATE_AGGREGATION)
#if 1
|| (!(lp->lp_state & LACP_STATE_ACTIVITY)
&& !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
#endif
) {
lp->lp_flags &= ~LACP_PORT_NTT;
}
if (!(lp->lp_flags & LACP_PORT_NTT))
return;
/* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
(3 / LACP_FAST_PERIODIC_TIME)) == 0) {
LACP_DPRINTF((lp, "rate limited pdu\n"));
return;
}
error = lacp_xmit_lacpdu(lp);
if (error == 0)
lp->lp_flags &= ~LACP_PORT_NTT;
else
LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
error));
}
void
lacp_sm_assert_ntt(struct lacp_port *lp)
{
lp->lp_flags |= LACP_PORT_NTT;
}
void
lacp_run_timers(struct lacp_port *lp)
{
int i;
for (i = 0; i < LACP_NTIMER; i++) {
KASSERT(lp->lp_timer[i] >= 0);
if (lp->lp_timer[i] == 0)
continue;
else if (--lp->lp_timer[i] <= 0) {
if (lacp_timer_funcs[i])
(*lacp_timer_funcs[i])(lp);
}
}
}
int
lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct trunk_port *tp = lp->lp_trunk;
struct lacp_port *lp2;
struct markerdu *mdu;
int error = 0;
int pending = 0;
if (m->m_pkthdr.len != sizeof(*mdu))
goto bad;
if ((m->m_flags & M_MCAST) == 0)
goto bad;
if (m->m_len < sizeof(*mdu)) {
m = m_pullup(m, sizeof(*mdu));
if (m == NULL)
return (ENOMEM);
}
mdu = mtod(m, struct markerdu *);
if (memcmp(&mdu->mdu_eh.ether_dhost,
&ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN))
goto bad;
if (mdu->mdu_sph.sph_version != 1)
goto bad;
switch (mdu->mdu_tlv.tlv_type) {
case MARKER_TYPE_INFO:
if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
marker_info_tlv_template, 1))
goto bad;
mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
memcpy(&mdu->mdu_eh.ether_dhost,
&ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
memcpy(&mdu->mdu_eh.ether_shost,
tp->tp_lladdr, ETHER_ADDR_LEN);
error = if_enqueue(lp->lp_ifp, m);
break;
case MARKER_TYPE_RESPONSE:
if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
marker_response_tlv_template, 1))
goto bad;
LACP_DPRINTF((lp, "marker response, port=%u, sys=%s, id=%u\n",
ntohs(mdu->mdu_info.mi_rq_port),
ether_sprintf(mdu->mdu_info.mi_rq_system),
ntohl(mdu->mdu_info.mi_rq_xid)));
/* Verify that it is the last marker we sent out */
if (memcmp(&mdu->mdu_info, &lp->lp_marker,
sizeof(struct lacp_markerinfo)))
goto bad;
lp->lp_flags &= ~LACP_PORT_MARK;
if (lsc->lsc_suppress_distributing) {
/* Check if any ports are waiting for a response */
LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
if (lp2->lp_flags & LACP_PORT_MARK) {
pending = 1;
break;
}
}
if (pending == 0) {
/* All interface queues are clear */
LACP_DPRINTF((NULL, "queue flush complete\n"));
lsc->lsc_suppress_distributing = 0;
}
}
break;
default:
goto bad;
}
m_freem(m);
return (error);
bad:
LACP_DPRINTF((lp, "bad marker frame\n"));
m_freem(m);
return (EINVAL);
}
int
tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
const struct tlv_template *tmpl, int check_type)
{
while (/* CONSTCOND */ 1) {
if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size)
return (EINVAL);
if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
tlv->tlv_length != tmpl->tmpl_length)
return (EINVAL);
if (tmpl->tmpl_type == 0)
break;
tlv = (const struct tlvhdr *)
((const char *)tlv + tlv->tlv_length);
tmpl++;
}
return (0);
}
#if defined(LACP_DEBUG)
const char *
lacp_format_mac(const u_int8_t *mac, char *buf, size_t buflen)
{
snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
(int)mac[0],
(int)mac[1],
(int)mac[2],
(int)mac[3],
(int)mac[4],
(int)mac[5]);
return (buf);
}
const char *
lacp_format_systemid(const struct lacp_systemid *sysid,
char *buf, size_t buflen)
{
char macbuf[LACP_MACSTR_MAX+1];
snprintf(buf, buflen, "%04X,%s",
ntohs(sysid->lsi_prio),
lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
return (buf);
}
const char *
lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
{
snprintf(buf, buflen, "%04X,%04X",
ntohs(portid->lpi_prio),
ntohs(portid->lpi_portno));
return (buf);
}
const char *
lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
{
char sysid[LACP_SYSTEMIDSTR_MAX+1];
char portid[LACP_PORTIDSTR_MAX+1];
snprintf(buf, buflen, "(%s,%04X,%s)",
lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
ntohs(peer->lip_key),
lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
return (buf);
}
const char *
lacp_format_lagid(const struct lacp_peerinfo *a,
const struct lacp_peerinfo *b, char *buf, size_t buflen)
{
char astr[LACP_PARTNERSTR_MAX+1];
char bstr[LACP_PARTNERSTR_MAX+1];
#if 0
/*
* there's a convention to display small numbered peer
* in the left.
*/
if (lacp_compare_peerinfo(a, b) > 0) {
const struct lacp_peerinfo *t;
t = a;
a = b;
b = t;
}
#endif
snprintf(buf, buflen, "[%s,%s]",
lacp_format_partner(a, astr, sizeof(astr)),
lacp_format_partner(b, bstr, sizeof(bstr)));
return (buf);
}
const char *
lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
char *buf, size_t buflen)
{
if (la == NULL)
return ("(none)");
return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
}
const char *
lacp_format_state(u_int8_t state, char *buf, size_t buflen)
{
snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
return (buf);
}
void
lacp_dump_lacpdu(const struct lacpdu *du)
{
char buf[LACP_PARTNERSTR_MAX+1];
char buf2[LACP_STATESTR_MAX+1];
printf("actor=%s\n",
lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
printf("actor.state=%s\n",
lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
printf("partner=%s\n",
lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
printf("partner.state=%s\n",
lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
}
void
lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
{
va_list va;
if (lp)
printf("%s: ", lp->lp_ifp->if_xname);
va_start(va, fmt);
vprintf(fmt, va);
va_end(va);
}
#endif
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