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ieee8023ad_lacp.c
2206 lines (1853 loc) · 53.9 KB
/
ieee8023ad_lacp.c
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/* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-NetBSD
*
* 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_kern_tls.h"
#include "opt_ratelimit.h"
#include <sys/param.h>
#include <sys/callout.h>
#include <sys/eventhandler.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h> /* hz */
#include <sys/socket.h> /* for net/if.h */
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <machine/stdarg.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <sys/taskqueue.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/ethernet.h>
#include <net/infiniband.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_lagg.h>
#include <net/ieee8023ad_lacp.h>
/*
* actor system priority and port priority.
* XXX should be configurable.
*/
#define LACP_SYSTEM_PRIO 0x8000
#define LACP_PORT_PRIO 0x8000
const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
static 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 },
};
static const struct tlv_template marker_info_tlv_template[] = {
{ MARKER_TYPE_INFO,
sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
{ 0, 0 },
};
static 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 *);
static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
static void lacp_fill_markerinfo(struct lacp_port *,
struct lacp_markerinfo *);
static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
static void lacp_suppress_distributing(struct lacp_softc *,
struct lacp_aggregator *);
static void lacp_transit_expire(void *);
static void lacp_update_portmap(struct lacp_softc *);
static void lacp_select_active_aggregator(struct lacp_softc *);
static uint16_t lacp_compose_key(struct lacp_port *);
static int tlv_check(const void *, size_t, const struct tlvhdr *,
const struct tlv_template *, boolean_t);
static void lacp_tick(void *);
static void lacp_fill_aggregator_id(struct lacp_aggregator *,
const struct lacp_port *);
static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
const struct lacp_peerinfo *);
static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
const struct lacp_port *);
static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
const struct lacp_peerinfo *);
static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
struct lacp_port *);
static void lacp_aggregator_addref(struct lacp_softc *,
struct lacp_aggregator *);
static void lacp_aggregator_delref(struct lacp_softc *,
struct lacp_aggregator *);
/* receive machine */
static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
static int lacp_marker_input(struct lacp_port *, struct mbuf *);
static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
static void lacp_sm_rx_timer(struct lacp_port *);
static void lacp_sm_rx_set_expired(struct lacp_port *);
static void lacp_sm_rx_update_ntt(struct lacp_port *,
const struct lacpdu *);
static void lacp_sm_rx_record_pdu(struct lacp_port *,
const struct lacpdu *);
static void lacp_sm_rx_update_selected(struct lacp_port *,
const struct lacpdu *);
static void lacp_sm_rx_record_default(struct lacp_port *);
static void lacp_sm_rx_update_default_selected(struct lacp_port *);
static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
const struct lacp_peerinfo *);
/* mux machine */
static void lacp_sm_mux(struct lacp_port *);
static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
static void lacp_sm_mux_timer(struct lacp_port *);
/* periodic transmit machine */
static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
static void lacp_sm_ptx_timer(struct lacp_port *);
/* transmit machine */
static void lacp_sm_tx(struct lacp_port *);
static void lacp_sm_assert_ntt(struct lacp_port *);
static void lacp_run_timers(struct lacp_port *);
static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
const struct lacp_peerinfo *);
static int lacp_compare_systemid(const struct lacp_systemid *,
const struct lacp_systemid *);
static void lacp_port_enable(struct lacp_port *);
static void lacp_port_disable(struct lacp_port *);
static void lacp_select(struct lacp_port *);
static void lacp_unselect(struct lacp_port *);
static void lacp_disable_collecting(struct lacp_port *);
static void lacp_enable_collecting(struct lacp_port *);
static void lacp_disable_distributing(struct lacp_port *);
static void lacp_enable_distributing(struct lacp_port *);
static int lacp_xmit_lacpdu(struct lacp_port *);
static int lacp_xmit_marker(struct lacp_port *);
/* Debugging */
static void lacp_dump_lacpdu(const struct lacpdu *);
static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
size_t);
static const char *lacp_format_lagid(const struct lacp_peerinfo *,
const struct lacp_peerinfo *, char *, size_t);
static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
char *, size_t);
static const char *lacp_format_state(uint8_t, char *, size_t);
static const char *lacp_format_mac(const uint8_t *, char *, size_t);
static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
size_t);
static const char *lacp_format_portid(const struct lacp_portid *, char *,
size_t);
static void lacp_dprintf(const struct lacp_port *, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
VNET_DEFINE_STATIC(int, lacp_debug);
#define V_lacp_debug VNET(lacp_debug)
SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"ieee802.3ad");
SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
&VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
VNET_DEFINE_STATIC(int, lacp_default_strict_mode) = 1;
SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode,
CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(lacp_default_strict_mode), 0,
"LACP strict protocol compliance default");
#define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
#define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
#define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
/*
* partner administration variables.
* XXX should be configurable.
*/
static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
.lip_systemid = { .lsi_prio = 0xffff },
.lip_portid = { .lpi_prio = 0xffff },
.lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
};
static const struct lacp_peerinfo lacp_partner_admin_strict = {
.lip_systemid = { .lsi_prio = 0xffff },
.lip_portid = { .lpi_prio = 0xffff },
.lip_state = 0,
};
static 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,
};
struct mbuf *
lacp_input(struct lagg_port *lgp, struct mbuf *m)
{
struct lacp_port *lp = LACP_PORT(lgp);
uint8_t subtype;
if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
m_freem(m);
return (NULL);
}
m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
switch (subtype) {
case SLOWPROTOCOLS_SUBTYPE_LACP:
lacp_pdu_input(lp, m);
return (NULL);
case SLOWPROTOCOLS_SUBTYPE_MARKER:
lacp_marker_input(lp, m);
return (NULL);
}
/* Not a subtype we are interested in */
return (m);
}
/*
* lacp_pdu_input: process lacpdu
*/
static int
lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
{
struct lacp_softc *lsc = lp->lp_lsc;
struct lacpdu *du;
int error = 0;
if (m->m_pkthdr.len != sizeof(*du)) {
goto bad;
}
if ((m->m_flags & M_MCAST) == 0) {
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,
ðermulticastaddr_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.
*/
if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
lacp_info_tlv_template, FALSE)) {
goto bad;
}
if (V_lacp_debug > 0) {
lacp_dprintf(lp, "lacpdu receive\n");
lacp_dump_lacpdu(du);
}
if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
LACP_TPRINTF((lp, "Dropping RX PDU\n"));
goto bad;
}
LACP_LOCK(lsc);
lacp_sm_rx(lp, du);
LACP_UNLOCK(lsc);
m_freem(m);
return (error);
bad:
m_freem(m);
return (EINVAL);
}
static void
lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
{
struct lagg_port *lgp = lp->lp_lagg;
struct lagg_softc *sc = lgp->lp_softc;
info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
memcpy(&info->lip_systemid.lsi_mac,
IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
info->lip_state = lp->lp_state;
}
static 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);
}
static int
lacp_xmit_lacpdu(struct lacp_port *lp)
{
struct lagg_port *lgp = lp->lp_lagg;
struct mbuf *m;
struct lacpdu *du;
int error;
LACP_LOCK_ASSERT(lp->lp_lsc);
m = m_gethdr(M_NOWAIT, MT_DATA);
if (m == NULL) {
return (ENOMEM);
}
m->m_len = m->m_pkthdr.len = sizeof(*du);
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, lgp->lp_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 (V_lacp_debug > 0) {
lacp_dprintf(lp, "lacpdu transmit\n");
lacp_dump_lacpdu(du);
}
m->m_flags |= M_MCAST;
/*
* XXX should use higher priority queue.
* otherwise network congestion can break aggregation.
*/
error = lagg_enqueue(lp->lp_ifp, m);
return (error);
}
static int
lacp_xmit_marker(struct lacp_port *lp)
{
struct lagg_port *lgp = lp->lp_lagg;
struct mbuf *m;
struct markerdu *mdu;
int error;
LACP_LOCK_ASSERT(lp->lp_lsc);
m = m_gethdr(M_NOWAIT, MT_DATA);
if (m == NULL) {
return (ENOMEM);
}
m->m_len = m->m_pkthdr.len = sizeof(*mdu);
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, lgp->lp_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=%6D, id=%u\n",
ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
ntohl(mdu->mdu_info.mi_rq_xid)));
m->m_flags |= M_MCAST;
error = lagg_enqueue(lp->lp_ifp, m);
return (error);
}
void
lacp_linkstate(struct lagg_port *lgp)
{
struct lacp_port *lp = LACP_PORT(lgp);
struct lacp_softc *lsc = lp->lp_lsc;
struct ifnet *ifp = lgp->lp_ifp;
struct ifmediareq ifmr;
int error = 0;
u_int media;
uint8_t old_state;
uint16_t old_key;
bzero((char *)&ifmr, sizeof(ifmr));
error = (*ifp->if_ioctl)(ifp, SIOCGIFXMEDIA, (caddr_t)&ifmr);
if (error != 0) {
bzero((char *)&ifmr, sizeof(ifmr));
error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
}
if (error != 0)
return;
LACP_LOCK(lsc);
media = ifmr.ifm_active;
LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
"link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
(media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
old_state = lp->lp_state;
old_key = lp->lp_key;
lp->lp_media = media;
/*
* If the port is not an active full duplex Ethernet link then it can
* not be aggregated.
*/
if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
ifp->if_link_state != LINK_STATE_UP) {
lacp_port_disable(lp);
} else {
lacp_port_enable(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;
}
LACP_UNLOCK(lsc);
}
static 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;
CURVNET_SET(lp->lp_ifp->if_vnet);
lacp_run_timers(lp);
lacp_select(lp);
lacp_sm_mux(lp);
lacp_sm_tx(lp);
lacp_sm_ptx_tx_schedule(lp);
CURVNET_RESTORE();
}
callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
}
int
lacp_port_create(struct lagg_port *lgp)
{
struct lagg_softc *sc = lgp->lp_softc;
struct lacp_softc *lsc = LACP_SOFTC(sc);
struct lacp_port *lp;
struct ifnet *ifp = lgp->lp_ifp;
struct sockaddr_dl sdl;
struct ifmultiaddr *rifma = NULL;
int error;
link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
sdl.sdl_alen = ETHER_ADDR_LEN;
bcopy(ðermulticastaddr_slowprotocols,
LLADDR(&sdl), ETHER_ADDR_LEN);
error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
if (error) {
printf("%s: ADDMULTI failed on %s\n", __func__,
lgp->lp_ifp->if_xname);
return (error);
}
lp = malloc(sizeof(struct lacp_port),
M_DEVBUF, M_NOWAIT|M_ZERO);
if (lp == NULL)
return (ENOMEM);
LACP_LOCK(lsc);
lgp->lp_psc = lp;
lp->lp_ifp = ifp;
lp->lp_lagg = lgp;
lp->lp_lsc = lsc;
lp->lp_ifma = rifma;
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 = LACP_STATE_ACTIVITY;
lp->lp_aggregator = NULL;
lacp_sm_rx_set_expired(lp);
LACP_UNLOCK(lsc);
lacp_linkstate(lgp);
return (0);
}
void
lacp_port_destroy(struct lagg_port *lgp)
{
struct lacp_port *lp = LACP_PORT(lgp);
struct lacp_softc *lsc = lp->lp_lsc;
int i;
LACP_LOCK(lsc);
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);
LACP_UNLOCK(lsc);
/* The address may have already been removed by if_purgemaddrs() */
if (!lgp->lp_detaching)
if_delmulti_ifma(lp->lp_ifma);
free(lp, M_DEVBUF);
}
void
lacp_req(struct lagg_softc *sc, void *data)
{
struct lacp_opreq *req = (struct lacp_opreq *)data;
struct lacp_softc *lsc = LACP_SOFTC(sc);
struct lacp_aggregator *la;
bzero(req, sizeof(struct lacp_opreq));
/*
* If the LACP softc is NULL, return with the opreq structure full of
* zeros. It is normal for the softc to be NULL while the lagg is
* being destroyed.
*/
if (NULL == lsc)
return;
la = lsc->lsc_active_aggregator;
LACP_LOCK(lsc);
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;
}
LACP_UNLOCK(lsc);
}
void
lacp_portreq(struct lagg_port *lgp, void *data)
{
struct lacp_opreq *req = (struct lacp_opreq *)data;
struct lacp_port *lp = LACP_PORT(lgp);
struct lacp_softc *lsc = lp->lp_lsc;
LACP_LOCK(lsc);
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;
LACP_UNLOCK(lsc);
}
static void
lacp_disable_collecting(struct lacp_port *lp)
{
LACP_DPRINTF((lp, "collecting disabled\n"));
lp->lp_state &= ~LACP_STATE_COLLECTING;
}
static void
lacp_enable_collecting(struct lacp_port *lp)
{
LACP_DPRINTF((lp, "collecting enabled\n"));
lp->lp_state |= LACP_STATE_COLLECTING;
}
static void
lacp_disable_distributing(struct lacp_port *lp)
{
struct lacp_aggregator *la = lp->lp_aggregator;
struct lacp_softc *lsc = lp->lp_lsc;
struct lagg_softc *sc = lsc->lsc_softc;
char buf[LACP_LAGIDSTR_MAX+1];
LACP_LOCK_ASSERT(lsc);
if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
return;
}
KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
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--;
sc->sc_active = 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;
if_link_state_change(sc->sc_ifp,
sc->sc_active ? LINK_STATE_UP : LINK_STATE_DOWN);
}
static void
lacp_enable_distributing(struct lacp_port *lp)
{
struct lacp_aggregator *la = lp->lp_aggregator;
struct lacp_softc *lsc = lp->lp_lsc;
struct lagg_softc *sc = lsc->lsc_softc;
char buf[LACP_LAGIDSTR_MAX+1];
LACP_LOCK_ASSERT(lsc);
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, ("aggregator refcnt invalid"));
TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
la->la_nports++;
sc->sc_active = 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);
if_link_state_change(sc->sc_ifp,
sc->sc_active ? LINK_STATE_UP : LINK_STATE_DOWN);
}
static void
lacp_transit_expire(void *vp)
{
struct lacp_softc *lsc = vp;
LACP_LOCK_ASSERT(lsc);
CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
LACP_TRACE(NULL);
CURVNET_RESTORE();
lsc->lsc_suppress_distributing = FALSE;
}
void
lacp_attach(struct lagg_softc *sc)
{
struct lacp_softc *lsc;
lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_psc = lsc;
lsc->lsc_softc = sc;
lsc->lsc_hashkey = m_ether_tcpip_hash_init();
lsc->lsc_active_aggregator = NULL;
lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
LACP_LOCK_INIT(lsc);
TAILQ_INIT(&lsc->lsc_aggregators);
LIST_INIT(&lsc->lsc_ports);
callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
/* if the lagg is already up then do the same */
if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
lacp_init(sc);
}
void
lacp_detach(void *psc)
{
struct lacp_softc *lsc = (struct lacp_softc *)psc;
KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
("aggregators still active"));
KASSERT(lsc->lsc_active_aggregator == NULL,
("aggregator still attached"));
callout_drain(&lsc->lsc_transit_callout);
callout_drain(&lsc->lsc_callout);
LACP_LOCK_DESTROY(lsc);
free(lsc, M_DEVBUF);
}
void
lacp_init(struct lagg_softc *sc)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
LACP_LOCK(lsc);
callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
LACP_UNLOCK(lsc);
}
void
lacp_stop(struct lagg_softc *sc)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
LACP_LOCK(lsc);
callout_stop(&lsc->lsc_transit_callout);
callout_stop(&lsc->lsc_callout);
LACP_UNLOCK(lsc);
}
struct lagg_port *
lacp_select_tx_port_by_hash(struct lagg_softc *sc, uint32_t hash,
uint8_t numa_domain, int *err)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
struct lacp_portmap *pm;
struct lacp_port *lp;
struct lacp_port **map;
int count;
if (__predict_false(lsc->lsc_suppress_distributing)) {
LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
*err = ENOBUFS;
return (NULL);
}
pm = &lsc->lsc_pmap[lsc->lsc_activemap];
if (pm->pm_count == 0) {
LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
*err = ENETDOWN;
return (NULL);
}
#ifdef NUMA
if ((sc->sc_opts & LAGG_OPT_USE_NUMA) &&
pm->pm_num_dom > 1 && numa_domain < MAXMEMDOM) {
count = pm->pm_numa[numa_domain].count;
if (count > 0) {
map = pm->pm_numa[numa_domain].map;
} else {
/* No ports on this domain; use global hash. */
map = pm->pm_map;
count = pm->pm_count;
}
} else
#endif
{
map = pm->pm_map;
count = pm->pm_count;
}
hash %= count;
lp = map[hash];
KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
("aggregated port is not distributing"));
return (lp->lp_lagg);
}
struct lagg_port *
lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m, int *err)
{
struct lacp_softc *lsc = LACP_SOFTC(sc);
uint32_t hash;
uint8_t numa_domain;
if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
hash = m->m_pkthdr.flowid >> sc->flowid_shift;
else
hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey);
numa_domain = m->m_pkthdr.numa_domain;
return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, err));
}
/*
* lacp_suppress_distributing: drop transmit packets for a while
* to preserve packet ordering.
*/
static void
lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
{
struct lacp_port *lp;
if (lsc->lsc_active_aggregator != la) {
return;
}
LACP_TRACE(NULL);
lsc->lsc_suppress_distributing = TRUE;
/* 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 */
callout_reset(&lsc->lsc_transit_callout,
LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
}
static int
lacp_compare_peerinfo(const struct lacp_peerinfo *a,
const struct lacp_peerinfo *b)
{
return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
}
static int
lacp_compare_systemid(const struct lacp_systemid *a,
const struct lacp_systemid *b)
{
return (memcmp(a, b, sizeof(*a)));
}
#if 0 /* unused */
static int
lacp_compare_portid(const struct lacp_portid *a,
const struct lacp_portid *b)
{
return (memcmp(a, b, sizeof(*a)));
}
#endif
static uint64_t
lacp_aggregator_bandwidth(struct lacp_aggregator *la)
{
struct lacp_port *lp;
uint64_t speed;
lp = TAILQ_FIRST(&la->la_ports);
if (lp == NULL) {
return (0);
}
speed = ifmedia_baudrate(lp->lp_media);
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 lagg(4) interface.
*/
static void
lacp_select_active_aggregator(struct lacp_softc *lsc)
{
struct lacp_aggregator *la;
struct lacp_aggregator *best_la = NULL;
uint64_t best_speed = 0;
char buf[LACP_LAGIDSTR_MAX+1];
LACP_TRACE(NULL);
TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
uint64_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));