1 /* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */
4 * Copyright (c)2005 YAMAMOTO Takashi,
5 * Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/callout.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h> /* hz */
39 #include <sys/socket.h> /* for net/if.h */
40 #include <sys/sockio.h>
41 #include <sys/sysctl.h>
42 #include <machine/stdarg.h>
44 #include <sys/rwlock.h>
47 #include <net/if_dl.h>
48 #include <net/ethernet.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
52 #include <net/if_lagg.h>
53 #include <net/ieee8023ad_lacp.h>
56 * actor system priority and port priority.
57 * XXX should be configurable.
60 #define LACP_SYSTEM_PRIO 0x8000
61 #define LACP_PORT_PRIO 0x8000
63 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
64 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
66 static const struct tlv_template lacp_info_tlv_template[] = {
67 { LACP_TYPE_ACTORINFO,
68 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
69 { LACP_TYPE_PARTNERINFO,
70 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
71 { LACP_TYPE_COLLECTORINFO,
72 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
76 static const struct tlv_template marker_info_tlv_template[] = {
78 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
82 static const struct tlv_template marker_response_tlv_template[] = {
83 { MARKER_TYPE_RESPONSE,
84 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
88 typedef void (*lacp_timer_func_t)(struct lacp_port *);
90 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
91 static void lacp_fill_markerinfo(struct lacp_port *,
92 struct lacp_markerinfo *);
94 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
95 static void lacp_suppress_distributing(struct lacp_softc *,
96 struct lacp_aggregator *);
97 static void lacp_transit_expire(void *);
98 static void lacp_update_portmap(struct lacp_softc *);
99 static void lacp_select_active_aggregator(struct lacp_softc *);
100 static uint16_t lacp_compose_key(struct lacp_port *);
101 static int tlv_check(const void *, size_t, const struct tlvhdr *,
102 const struct tlv_template *, boolean_t);
103 static void lacp_tick(void *);
105 static void lacp_fill_aggregator_id(struct lacp_aggregator *,
106 const struct lacp_port *);
107 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
108 const struct lacp_peerinfo *);
109 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
110 const struct lacp_port *);
111 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
112 const struct lacp_peerinfo *);
114 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
116 static void lacp_aggregator_addref(struct lacp_softc *,
117 struct lacp_aggregator *);
118 static void lacp_aggregator_delref(struct lacp_softc *,
119 struct lacp_aggregator *);
121 /* receive machine */
123 static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
124 static int lacp_marker_input(struct lacp_port *, struct mbuf *);
125 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
126 static void lacp_sm_rx_timer(struct lacp_port *);
127 static void lacp_sm_rx_set_expired(struct lacp_port *);
128 static void lacp_sm_rx_update_ntt(struct lacp_port *,
129 const struct lacpdu *);
130 static void lacp_sm_rx_record_pdu(struct lacp_port *,
131 const struct lacpdu *);
132 static void lacp_sm_rx_update_selected(struct lacp_port *,
133 const struct lacpdu *);
134 static void lacp_sm_rx_record_default(struct lacp_port *);
135 static void lacp_sm_rx_update_default_selected(struct lacp_port *);
136 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
137 const struct lacp_peerinfo *);
141 static void lacp_sm_mux(struct lacp_port *);
142 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
143 static void lacp_sm_mux_timer(struct lacp_port *);
145 /* periodic transmit machine */
147 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
148 static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
149 static void lacp_sm_ptx_timer(struct lacp_port *);
151 /* transmit machine */
153 static void lacp_sm_tx(struct lacp_port *);
154 static void lacp_sm_assert_ntt(struct lacp_port *);
156 static void lacp_run_timers(struct lacp_port *);
157 static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
158 const struct lacp_peerinfo *);
159 static int lacp_compare_systemid(const struct lacp_systemid *,
160 const struct lacp_systemid *);
161 static void lacp_port_enable(struct lacp_port *);
162 static void lacp_port_disable(struct lacp_port *);
163 static void lacp_select(struct lacp_port *);
164 static void lacp_unselect(struct lacp_port *);
165 static void lacp_disable_collecting(struct lacp_port *);
166 static void lacp_enable_collecting(struct lacp_port *);
167 static void lacp_disable_distributing(struct lacp_port *);
168 static void lacp_enable_distributing(struct lacp_port *);
169 static int lacp_xmit_lacpdu(struct lacp_port *);
170 static int lacp_xmit_marker(struct lacp_port *);
174 static void lacp_dump_lacpdu(const struct lacpdu *);
175 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
177 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
178 const struct lacp_peerinfo *, char *, size_t);
179 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
181 static const char *lacp_format_state(uint8_t, char *, size_t);
182 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
183 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
185 static const char *lacp_format_portid(const struct lacp_portid *, char *,
187 static void lacp_dprintf(const struct lacp_port *, const char *, ...)
188 __attribute__((__format__(__printf__, 2, 3)));
190 static VNET_DEFINE(int, lacp_debug);
191 #define V_lacp_debug VNET(lacp_debug)
192 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad");
193 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
194 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
196 static VNET_DEFINE(int, lacp_default_strict_mode) = 1;
197 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode, CTLFLAG_RWTUN,
198 &VNET_NAME(lacp_default_strict_mode), 0,
199 "LACP strict protocol compliance default");
201 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
202 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
203 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
206 * partner administration variables.
207 * XXX should be configurable.
210 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
211 .lip_systemid = { .lsi_prio = 0xffff },
212 .lip_portid = { .lpi_prio = 0xffff },
213 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
214 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
217 static const struct lacp_peerinfo lacp_partner_admin_strict = {
218 .lip_systemid = { .lsi_prio = 0xffff },
219 .lip_portid = { .lpi_prio = 0xffff },
223 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
224 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
225 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
226 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
230 lacp_input(struct lagg_port *lgp, struct mbuf *m)
232 struct lacp_port *lp = LACP_PORT(lgp);
235 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
240 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
242 case SLOWPROTOCOLS_SUBTYPE_LACP:
243 lacp_pdu_input(lp, m);
246 case SLOWPROTOCOLS_SUBTYPE_MARKER:
247 lacp_marker_input(lp, m);
251 /* Not a subtype we are interested in */
256 * lacp_pdu_input: process lacpdu
259 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
261 struct lacp_softc *lsc = lp->lp_lsc;
265 if (m->m_pkthdr.len != sizeof(*du)) {
269 if ((m->m_flags & M_MCAST) == 0) {
273 if (m->m_len < sizeof(*du)) {
274 m = m_pullup(m, sizeof(*du));
280 du = mtod(m, struct lacpdu *);
282 if (memcmp(&du->ldu_eh.ether_dhost,
283 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
288 * ignore the version for compatibility with
289 * the future protocol revisions.
292 if (du->ldu_sph.sph_version != 1) {
298 * ignore tlv types for compatibility with
299 * the future protocol revisions.
301 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
302 lacp_info_tlv_template, FALSE)) {
306 if (V_lacp_debug > 0) {
307 lacp_dprintf(lp, "lacpdu receive\n");
308 lacp_dump_lacpdu(du);
311 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
312 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
329 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
331 struct lagg_port *lgp = lp->lp_lagg;
332 struct lagg_softc *sc = lgp->lp_softc;
334 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
335 memcpy(&info->lip_systemid.lsi_mac,
336 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
337 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
338 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
339 info->lip_state = lp->lp_state;
343 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
345 struct ifnet *ifp = lp->lp_ifp;
347 /* Fill in the port index and system id (encoded as the MAC) */
348 info->mi_rq_port = htons(ifp->if_index);
349 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
350 info->mi_rq_xid = htonl(0);
354 lacp_xmit_lacpdu(struct lacp_port *lp)
356 struct lagg_port *lgp = lp->lp_lagg;
361 LACP_LOCK_ASSERT(lp->lp_lsc);
363 m = m_gethdr(M_NOWAIT, MT_DATA);
367 m->m_len = m->m_pkthdr.len = sizeof(*du);
369 du = mtod(m, struct lacpdu *);
370 memset(du, 0, sizeof(*du));
372 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
374 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
375 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
377 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
378 du->ldu_sph.sph_version = 1;
380 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
381 du->ldu_actor = lp->lp_actor;
383 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
384 sizeof(du->ldu_partner));
385 du->ldu_partner = lp->lp_partner;
387 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
388 sizeof(du->ldu_collector));
389 du->ldu_collector.lci_maxdelay = 0;
391 if (V_lacp_debug > 0) {
392 lacp_dprintf(lp, "lacpdu transmit\n");
393 lacp_dump_lacpdu(du);
396 m->m_flags |= M_MCAST;
399 * XXX should use higher priority queue.
400 * otherwise network congestion can break aggregation.
403 error = lagg_enqueue(lp->lp_ifp, m);
408 lacp_xmit_marker(struct lacp_port *lp)
410 struct lagg_port *lgp = lp->lp_lagg;
412 struct markerdu *mdu;
415 LACP_LOCK_ASSERT(lp->lp_lsc);
417 m = m_gethdr(M_NOWAIT, MT_DATA);
421 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
423 mdu = mtod(m, struct markerdu *);
424 memset(mdu, 0, sizeof(*mdu));
426 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
428 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
429 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
431 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
432 mdu->mdu_sph.sph_version = 1;
434 /* Bump the transaction id and copy over the marker info */
435 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
436 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
437 mdu->mdu_info = lp->lp_marker;
439 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
440 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
441 ntohl(mdu->mdu_info.mi_rq_xid)));
443 m->m_flags |= M_MCAST;
444 error = lagg_enqueue(lp->lp_ifp, m);
449 lacp_linkstate(struct lagg_port *lgp)
451 struct lacp_port *lp = LACP_PORT(lgp);
452 struct lacp_softc *lsc = lp->lp_lsc;
453 struct ifnet *ifp = lgp->lp_ifp;
454 struct ifmediareq ifmr;
460 bzero((char *)&ifmr, sizeof(ifmr));
461 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
466 media = ifmr.ifm_active;
467 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
468 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
469 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
470 old_state = lp->lp_state;
471 old_key = lp->lp_key;
473 lp->lp_media = media;
475 * If the port is not an active full duplex Ethernet link then it can
478 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
479 ifp->if_link_state != LINK_STATE_UP) {
480 lacp_port_disable(lp);
482 lacp_port_enable(lp);
484 lp->lp_key = lacp_compose_key(lp);
486 if (old_state != lp->lp_state || old_key != lp->lp_key) {
487 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
488 lp->lp_selected = LACP_UNSELECTED;
496 struct lacp_softc *lsc = arg;
497 struct lacp_port *lp;
499 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
500 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
503 CURVNET_SET(lp->lp_ifp->if_vnet);
509 lacp_sm_ptx_tx_schedule(lp);
512 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
516 lacp_port_create(struct lagg_port *lgp)
518 struct lagg_softc *sc = lgp->lp_softc;
519 struct lacp_softc *lsc = LACP_SOFTC(sc);
520 struct lacp_port *lp;
521 struct ifnet *ifp = lgp->lp_ifp;
522 struct sockaddr_dl sdl;
523 struct ifmultiaddr *rifma = NULL;
526 bzero((char *)&sdl, sizeof(sdl));
527 sdl.sdl_len = sizeof(sdl);
528 sdl.sdl_family = AF_LINK;
529 sdl.sdl_index = ifp->if_index;
530 sdl.sdl_type = IFT_ETHER;
531 sdl.sdl_alen = ETHER_ADDR_LEN;
533 bcopy(ðermulticastaddr_slowprotocols,
534 LLADDR(&sdl), ETHER_ADDR_LEN);
535 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
537 printf("%s: ADDMULTI failed on %s\n", __func__, lgp->lp_ifname);
541 lp = malloc(sizeof(struct lacp_port),
542 M_DEVBUF, M_NOWAIT|M_ZERO);
547 lgp->lp_psc = (caddr_t)lp;
553 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
555 lacp_fill_actorinfo(lp, &lp->lp_actor);
556 lacp_fill_markerinfo(lp, &lp->lp_marker);
557 lp->lp_state = LACP_STATE_ACTIVITY;
558 lp->lp_aggregator = NULL;
559 lacp_sm_rx_set_expired(lp);
567 lacp_port_destroy(struct lagg_port *lgp)
569 struct lacp_port *lp = LACP_PORT(lgp);
570 struct lacp_softc *lsc = lp->lp_lsc;
574 for (i = 0; i < LACP_NTIMER; i++) {
575 LACP_TIMER_DISARM(lp, i);
578 lacp_disable_collecting(lp);
579 lacp_disable_distributing(lp);
582 LIST_REMOVE(lp, lp_next);
585 /* The address may have already been removed by if_purgemaddrs() */
586 if (!lgp->lp_detaching)
587 if_delmulti_ifma(lp->lp_ifma);
593 lacp_req(struct lagg_softc *sc, caddr_t data)
595 struct lacp_opreq *req = (struct lacp_opreq *)data;
596 struct lacp_softc *lsc = LACP_SOFTC(sc);
597 struct lacp_aggregator *la;
599 bzero(req, sizeof(struct lacp_opreq));
602 * If the LACP softc is NULL, return with the opreq structure full of
603 * zeros. It is normal for the softc to be NULL while the lagg is
609 la = lsc->lsc_active_aggregator;
612 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
613 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
615 req->actor_key = ntohs(la->la_actor.lip_key);
616 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
617 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
618 req->actor_state = la->la_actor.lip_state;
620 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
621 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
623 req->partner_key = ntohs(la->la_partner.lip_key);
624 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
625 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
626 req->partner_state = la->la_partner.lip_state;
632 lacp_portreq(struct lagg_port *lgp, caddr_t data)
634 struct lacp_opreq *req = (struct lacp_opreq *)data;
635 struct lacp_port *lp = LACP_PORT(lgp);
636 struct lacp_softc *lsc = lp->lp_lsc;
639 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
640 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
642 req->actor_key = ntohs(lp->lp_actor.lip_key);
643 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
644 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
645 req->actor_state = lp->lp_actor.lip_state;
647 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
648 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
650 req->partner_key = ntohs(lp->lp_partner.lip_key);
651 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
652 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
653 req->partner_state = lp->lp_partner.lip_state;
658 lacp_disable_collecting(struct lacp_port *lp)
660 LACP_DPRINTF((lp, "collecting disabled\n"));
661 lp->lp_state &= ~LACP_STATE_COLLECTING;
665 lacp_enable_collecting(struct lacp_port *lp)
667 LACP_DPRINTF((lp, "collecting enabled\n"));
668 lp->lp_state |= LACP_STATE_COLLECTING;
672 lacp_disable_distributing(struct lacp_port *lp)
674 struct lacp_aggregator *la = lp->lp_aggregator;
675 struct lacp_softc *lsc = lp->lp_lsc;
676 struct lagg_softc *sc = lsc->lsc_softc;
677 char buf[LACP_LAGIDSTR_MAX+1];
679 LACP_LOCK_ASSERT(lsc);
681 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
685 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
686 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
687 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
689 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
691 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
692 la->la_nports, la->la_nports - 1));
694 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
696 sc->sc_active = la->la_nports;
698 if (lsc->lsc_active_aggregator == la) {
699 lacp_suppress_distributing(lsc, la);
700 lacp_select_active_aggregator(lsc);
701 /* regenerate the port map, the active aggregator has changed */
702 lacp_update_portmap(lsc);
705 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
709 lacp_enable_distributing(struct lacp_port *lp)
711 struct lacp_aggregator *la = lp->lp_aggregator;
712 struct lacp_softc *lsc = lp->lp_lsc;
713 struct lagg_softc *sc = lsc->lsc_softc;
714 char buf[LACP_LAGIDSTR_MAX+1];
716 LACP_LOCK_ASSERT(lsc);
718 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
722 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
724 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
725 la->la_nports, la->la_nports + 1));
727 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
728 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
730 sc->sc_active = la->la_nports;
732 lp->lp_state |= LACP_STATE_DISTRIBUTING;
734 if (lsc->lsc_active_aggregator == la) {
735 lacp_suppress_distributing(lsc, la);
736 lacp_update_portmap(lsc);
738 /* try to become the active aggregator */
739 lacp_select_active_aggregator(lsc);
743 lacp_transit_expire(void *vp)
745 struct lacp_softc *lsc = vp;
747 LACP_LOCK_ASSERT(lsc);
749 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
753 lsc->lsc_suppress_distributing = FALSE;
757 lacp_attach(struct lagg_softc *sc)
759 struct lacp_softc *lsc;
761 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
763 sc->sc_psc = (caddr_t)lsc;
766 lsc->lsc_hashkey = arc4random();
767 lsc->lsc_active_aggregator = NULL;
768 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
770 TAILQ_INIT(&lsc->lsc_aggregators);
771 LIST_INIT(&lsc->lsc_ports);
773 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
774 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
776 /* if the lagg is already up then do the same */
777 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
782 lacp_detach(void *psc)
784 struct lacp_softc *lsc = (struct lacp_softc *)psc;
786 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
787 ("aggregators still active"));
788 KASSERT(lsc->lsc_active_aggregator == NULL,
789 ("aggregator still attached"));
791 callout_drain(&lsc->lsc_transit_callout);
792 callout_drain(&lsc->lsc_callout);
794 LACP_LOCK_DESTROY(lsc);
800 lacp_init(struct lagg_softc *sc)
802 struct lacp_softc *lsc = LACP_SOFTC(sc);
805 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
810 lacp_stop(struct lagg_softc *sc)
812 struct lacp_softc *lsc = LACP_SOFTC(sc);
815 callout_stop(&lsc->lsc_transit_callout);
816 callout_stop(&lsc->lsc_callout);
821 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
823 struct lacp_softc *lsc = LACP_SOFTC(sc);
824 struct lacp_portmap *pm;
825 struct lacp_port *lp;
828 if (__predict_false(lsc->lsc_suppress_distributing)) {
829 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
833 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
834 if (pm->pm_count == 0) {
835 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
839 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
840 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
841 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
843 hash = lagg_hashmbuf(sc, m, lsc->lsc_hashkey);
844 hash %= pm->pm_count;
845 lp = pm->pm_map[hash];
847 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
848 ("aggregated port is not distributing"));
850 return (lp->lp_lagg);
853 * lacp_suppress_distributing: drop transmit packets for a while
854 * to preserve packet ordering.
858 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
860 struct lacp_port *lp;
862 if (lsc->lsc_active_aggregator != la) {
868 lsc->lsc_suppress_distributing = TRUE;
870 /* send a marker frame down each port to verify the queues are empty */
871 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
872 lp->lp_flags |= LACP_PORT_MARK;
873 lacp_xmit_marker(lp);
876 /* set a timeout for the marker frames */
877 callout_reset(&lsc->lsc_transit_callout,
878 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
882 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
883 const struct lacp_peerinfo *b)
885 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
889 lacp_compare_systemid(const struct lacp_systemid *a,
890 const struct lacp_systemid *b)
892 return (memcmp(a, b, sizeof(*a)));
897 lacp_compare_portid(const struct lacp_portid *a,
898 const struct lacp_portid *b)
900 return (memcmp(a, b, sizeof(*a)));
905 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
907 struct lacp_port *lp;
910 lp = TAILQ_FIRST(&la->la_ports);
915 speed = ifmedia_baudrate(lp->lp_media);
916 speed *= la->la_nports;
918 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
919 lp->lp_media, la->la_nports));
926 * lacp_select_active_aggregator: select an aggregator to be used to transmit
927 * packets from lagg(4) interface.
931 lacp_select_active_aggregator(struct lacp_softc *lsc)
933 struct lacp_aggregator *la;
934 struct lacp_aggregator *best_la = NULL;
935 uint64_t best_speed = 0;
936 char buf[LACP_LAGIDSTR_MAX+1];
940 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
943 if (la->la_nports == 0) {
947 speed = lacp_aggregator_bandwidth(la);
948 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
949 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
950 speed, la->la_nports));
952 /* This aggregator is chosen if
953 * the partner has a better system priority
954 * or, the total aggregated speed is higher
955 * or, it is already the chosen aggregator
957 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
958 LACP_SYS_PRI(best_la->la_partner)) ||
959 speed > best_speed ||
960 (speed == best_speed &&
961 la == lsc->lsc_active_aggregator)) {
967 KASSERT(best_la == NULL || best_la->la_nports > 0,
968 ("invalid aggregator refcnt"));
969 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
970 ("invalid aggregator list"));
972 if (lsc->lsc_active_aggregator != best_la) {
973 LACP_DPRINTF((NULL, "active aggregator changed\n"));
974 LACP_DPRINTF((NULL, "old %s\n",
975 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
978 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
980 LACP_DPRINTF((NULL, "new %s\n",
981 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
983 if (lsc->lsc_active_aggregator != best_la) {
984 lsc->lsc_active_aggregator = best_la;
985 lacp_update_portmap(lsc);
987 lacp_suppress_distributing(lsc, best_la);
993 * Updated the inactive portmap array with the new list of ports and
997 lacp_update_portmap(struct lacp_softc *lsc)
999 struct lagg_softc *sc = lsc->lsc_softc;
1000 struct lacp_aggregator *la;
1001 struct lacp_portmap *p;
1002 struct lacp_port *lp;
1007 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1008 p = &lsc->lsc_pmap[newmap];
1009 la = lsc->lsc_active_aggregator;
1011 bzero(p, sizeof(struct lacp_portmap));
1013 if (la != NULL && la->la_nports > 0) {
1014 p->pm_count = la->la_nports;
1016 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
1017 p->pm_map[i++] = lp;
1018 KASSERT(i == p->pm_count, ("Invalid port count"));
1019 speed = lacp_aggregator_bandwidth(la);
1021 sc->sc_ifp->if_baudrate = speed;
1023 /* switch the active portmap over */
1024 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1025 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1027 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1031 lacp_compose_key(struct lacp_port *lp)
1033 struct lagg_port *lgp = lp->lp_lagg;
1034 struct lagg_softc *sc = lgp->lp_softc;
1035 u_int media = lp->lp_media;
1038 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1041 * non-aggregatable links should have unique keys.
1043 * XXX this isn't really unique as if_index is 16 bit.
1046 /* bit 0..14: (some bits of) if_index of this port */
1047 key = lp->lp_ifp->if_index;
1051 u_int subtype = IFM_SUBTYPE(media);
1053 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1054 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1056 /* bit 0..4: IFM_SUBTYPE modulo speed */
1078 case IFM_1000_SGMII:
1079 case IFM_1000_CX_SGMII:
1085 case IFM_10G_TWINAX:
1086 case IFM_10G_TWINAX_LONG:
1141 /* bit 5..14: (some bits of) if_index of lagg device */
1142 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1145 return (htons(key));
1149 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1151 char buf[LACP_LAGIDSTR_MAX+1];
1153 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1155 lacp_format_lagid(&la->la_actor, &la->la_partner,
1157 la->la_refcnt, la->la_refcnt + 1));
1159 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1161 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1165 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1167 char buf[LACP_LAGIDSTR_MAX+1];
1169 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1171 lacp_format_lagid(&la->la_actor, &la->la_partner,
1173 la->la_refcnt, la->la_refcnt - 1));
1175 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1177 if (la->la_refcnt > 0) {
1181 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1182 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1184 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1190 * lacp_aggregator_get: allocate an aggregator.
1193 static struct lacp_aggregator *
1194 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1196 struct lacp_aggregator *la;
1198 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1202 TAILQ_INIT(&la->la_ports);
1204 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1211 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1215 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1217 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1218 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1220 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1224 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1225 const struct lacp_peerinfo *lpi_port)
1227 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1228 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1229 lpi_aggr->lip_key = lpi_port->lip_key;
1233 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1237 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1238 const struct lacp_port *lp)
1240 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1241 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1245 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1249 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1253 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1261 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1262 const struct lacp_peerinfo *b)
1264 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1265 sizeof(a->lip_systemid))) {
1269 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1277 lacp_port_enable(struct lacp_port *lp)
1279 lp->lp_state |= LACP_STATE_AGGREGATION;
1283 lacp_port_disable(struct lacp_port *lp)
1285 lacp_set_mux(lp, LACP_MUX_DETACHED);
1287 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1288 lp->lp_selected = LACP_UNSELECTED;
1289 lacp_sm_rx_record_default(lp);
1290 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1291 lp->lp_state &= ~LACP_STATE_EXPIRED;
1295 * lacp_select: select an aggregator. create one if necessary.
1298 lacp_select(struct lacp_port *lp)
1300 struct lacp_softc *lsc = lp->lp_lsc;
1301 struct lacp_aggregator *la;
1302 char buf[LACP_LAGIDSTR_MAX+1];
1304 if (lp->lp_aggregator) {
1308 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1309 ("timer_wait_while still active"));
1311 LACP_DPRINTF((lp, "port lagid=%s\n",
1312 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1313 buf, sizeof(buf))));
1315 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1316 if (lacp_aggregator_is_compatible(la, lp)) {
1322 la = lacp_aggregator_get(lsc, lp);
1324 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1327 * will retry on the next tick.
1332 lacp_fill_aggregator_id(la, lp);
1333 LACP_DPRINTF((lp, "aggregator created\n"));
1335 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1336 if (la->la_refcnt == LACP_MAX_PORTS)
1338 lacp_aggregator_addref(lsc, la);
1341 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1342 lacp_format_lagid(&la->la_actor, &la->la_partner,
1343 buf, sizeof(buf))));
1345 lp->lp_aggregator = la;
1346 lp->lp_selected = LACP_SELECTED;
1350 * lacp_unselect: finish unselect/detach process.
1354 lacp_unselect(struct lacp_port *lp)
1356 struct lacp_softc *lsc = lp->lp_lsc;
1357 struct lacp_aggregator *la = lp->lp_aggregator;
1359 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1360 ("timer_wait_while still active"));
1366 lp->lp_aggregator = NULL;
1367 lacp_aggregator_delref(lsc, la);
1373 lacp_sm_mux(struct lacp_port *lp)
1375 struct lagg_port *lgp = lp->lp_lagg;
1376 struct lagg_softc *sc = lgp->lp_softc;
1377 enum lacp_mux_state new_state;
1379 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1380 boolean_t p_collecting =
1381 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1382 enum lacp_selected selected = lp->lp_selected;
1383 struct lacp_aggregator *la;
1385 if (V_lacp_debug > 1)
1386 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
1387 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
1388 lp->lp_mux_state, selected, p_sync, p_collecting);
1391 la = lp->lp_aggregator;
1392 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1393 ("MUX not detached"));
1394 new_state = lp->lp_mux_state;
1395 switch (lp->lp_mux_state) {
1396 case LACP_MUX_DETACHED:
1397 if (selected != LACP_UNSELECTED) {
1398 new_state = LACP_MUX_WAITING;
1401 case LACP_MUX_WAITING:
1402 KASSERT(la->la_pending > 0 ||
1403 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1404 ("timer_wait_while still active"));
1405 if (selected == LACP_SELECTED && la->la_pending == 0) {
1406 new_state = LACP_MUX_ATTACHED;
1407 } else if (selected == LACP_UNSELECTED) {
1408 new_state = LACP_MUX_DETACHED;
1411 case LACP_MUX_ATTACHED:
1412 if (selected == LACP_SELECTED && p_sync) {
1413 new_state = LACP_MUX_COLLECTING;
1414 } else if (selected != LACP_SELECTED) {
1415 new_state = LACP_MUX_DETACHED;
1418 case LACP_MUX_COLLECTING:
1419 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1420 new_state = LACP_MUX_DISTRIBUTING;
1421 } else if (selected != LACP_SELECTED || !p_sync) {
1422 new_state = LACP_MUX_ATTACHED;
1425 case LACP_MUX_DISTRIBUTING:
1426 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1427 new_state = LACP_MUX_COLLECTING;
1428 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
1433 panic("%s: unknown state", __func__);
1436 if (lp->lp_mux_state == new_state) {
1440 lacp_set_mux(lp, new_state);
1445 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1447 struct lacp_aggregator *la = lp->lp_aggregator;
1449 if (lp->lp_mux_state == new_state) {
1453 switch (new_state) {
1454 case LACP_MUX_DETACHED:
1455 lp->lp_state &= ~LACP_STATE_SYNC;
1456 lacp_disable_distributing(lp);
1457 lacp_disable_collecting(lp);
1458 lacp_sm_assert_ntt(lp);
1460 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1461 KASSERT(la->la_pending > 0,
1462 ("timer_wait_while not active"));
1465 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1468 case LACP_MUX_WAITING:
1469 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1470 LACP_AGGREGATE_WAIT_TIME);
1473 case LACP_MUX_ATTACHED:
1474 lp->lp_state |= LACP_STATE_SYNC;
1475 lacp_disable_collecting(lp);
1476 lacp_sm_assert_ntt(lp);
1478 case LACP_MUX_COLLECTING:
1479 lacp_enable_collecting(lp);
1480 lacp_disable_distributing(lp);
1481 lacp_sm_assert_ntt(lp);
1483 case LACP_MUX_DISTRIBUTING:
1484 lacp_enable_distributing(lp);
1487 panic("%s: unknown state", __func__);
1490 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1492 lp->lp_mux_state = new_state;
1496 lacp_sm_mux_timer(struct lacp_port *lp)
1498 struct lacp_aggregator *la = lp->lp_aggregator;
1499 char buf[LACP_LAGIDSTR_MAX+1];
1501 KASSERT(la->la_pending > 0, ("no pending event"));
1503 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1504 lacp_format_lagid(&la->la_actor, &la->la_partner,
1506 la->la_pending, la->la_pending - 1));
1511 /* periodic transmit machine */
1514 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1516 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1517 LACP_STATE_TIMEOUT)) {
1521 LACP_DPRINTF((lp, "partner timeout changed\n"));
1524 * FAST_PERIODIC -> SLOW_PERIODIC
1526 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1528 * let lacp_sm_ptx_tx_schedule to update timeout.
1531 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1534 * if timeout has been shortened, assert NTT.
1537 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1538 lacp_sm_assert_ntt(lp);
1543 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1547 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1548 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1554 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1558 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1562 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1563 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1565 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1569 lacp_sm_ptx_timer(struct lacp_port *lp)
1571 lacp_sm_assert_ntt(lp);
1575 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1580 * check LACP_DISABLED first
1583 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1588 * check loopback condition.
1591 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1592 &lp->lp_actor.lip_systemid)) {
1597 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1600 lacp_sm_rx_update_selected(lp, du);
1601 lacp_sm_rx_update_ntt(lp, du);
1602 lacp_sm_rx_record_pdu(lp, du);
1604 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1605 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1606 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1608 lp->lp_state &= ~LACP_STATE_EXPIRED;
1611 * kick transmit machine without waiting the next tick.
1618 lacp_sm_rx_set_expired(struct lacp_port *lp)
1620 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1621 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1622 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1623 lp->lp_state |= LACP_STATE_EXPIRED;
1627 lacp_sm_rx_timer(struct lacp_port *lp)
1629 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1630 /* CURRENT -> EXPIRED */
1631 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1632 lacp_sm_rx_set_expired(lp);
1634 /* EXPIRED -> DEFAULTED */
1635 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1636 lacp_sm_rx_update_default_selected(lp);
1637 lacp_sm_rx_record_default(lp);
1638 lp->lp_state &= ~LACP_STATE_EXPIRED;
1643 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1647 char buf[LACP_STATESTR_MAX+1];
1651 oldpstate = lp->lp_partner.lip_state;
1653 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1654 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1655 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1657 lp->lp_partner = du->ldu_actor;
1659 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1660 LACP_STATE_AGGREGATION) &&
1661 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1662 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1665 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1668 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1670 if (oldpstate != lp->lp_partner.lip_state) {
1671 LACP_DPRINTF((lp, "old pstate %s\n",
1672 lacp_format_state(oldpstate, buf, sizeof(buf))));
1673 LACP_DPRINTF((lp, "new pstate %s\n",
1674 lacp_format_state(lp->lp_partner.lip_state, buf,
1678 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */
1679 if (lp->lp_lsc->lsc_strict_mode)
1680 lp->lp_partner.lip_state |= LACP_STATE_SYNC;
1682 lacp_sm_ptx_update_timeout(lp, oldpstate);
1686 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1691 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1692 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1693 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1694 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1695 lacp_sm_assert_ntt(lp);
1700 lacp_sm_rx_record_default(struct lacp_port *lp)
1706 oldpstate = lp->lp_partner.lip_state;
1707 if (lp->lp_lsc->lsc_strict_mode)
1708 lp->lp_partner = lacp_partner_admin_strict;
1710 lp->lp_partner = lacp_partner_admin_optimistic;
1711 lp->lp_state |= LACP_STATE_DEFAULTED;
1712 lacp_sm_ptx_update_timeout(lp, oldpstate);
1716 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1717 const struct lacp_peerinfo *info)
1722 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1723 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1724 LACP_STATE_AGGREGATION)) {
1725 lp->lp_selected = LACP_UNSELECTED;
1726 /* mux machine will clean up lp->lp_aggregator */
1731 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1736 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1740 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1745 if (lp->lp_lsc->lsc_strict_mode)
1746 lacp_sm_rx_update_selected_from_peerinfo(lp,
1747 &lacp_partner_admin_strict);
1749 lacp_sm_rx_update_selected_from_peerinfo(lp,
1750 &lacp_partner_admin_optimistic);
1753 /* transmit machine */
1756 lacp_sm_tx(struct lacp_port *lp)
1760 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1762 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1763 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1766 lp->lp_flags &= ~LACP_PORT_NTT;
1769 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1773 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1774 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1775 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1776 LACP_DPRINTF((lp, "rate limited pdu\n"));
1780 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
1781 error = lacp_xmit_lacpdu(lp);
1783 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
1787 lp->lp_flags &= ~LACP_PORT_NTT;
1789 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1795 lacp_sm_assert_ntt(struct lacp_port *lp)
1798 lp->lp_flags |= LACP_PORT_NTT;
1802 lacp_run_timers(struct lacp_port *lp)
1806 for (i = 0; i < LACP_NTIMER; i++) {
1807 KASSERT(lp->lp_timer[i] >= 0,
1808 ("invalid timer value %d", lp->lp_timer[i]));
1809 if (lp->lp_timer[i] == 0) {
1811 } else if (--lp->lp_timer[i] <= 0) {
1812 if (lacp_timer_funcs[i]) {
1813 (*lacp_timer_funcs[i])(lp);
1820 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1822 struct lacp_softc *lsc = lp->lp_lsc;
1823 struct lagg_port *lgp = lp->lp_lagg;
1824 struct lacp_port *lp2;
1825 struct markerdu *mdu;
1829 if (m->m_pkthdr.len != sizeof(*mdu)) {
1833 if ((m->m_flags & M_MCAST) == 0) {
1837 if (m->m_len < sizeof(*mdu)) {
1838 m = m_pullup(m, sizeof(*mdu));
1844 mdu = mtod(m, struct markerdu *);
1846 if (memcmp(&mdu->mdu_eh.ether_dhost,
1847 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
1851 if (mdu->mdu_sph.sph_version != 1) {
1855 switch (mdu->mdu_tlv.tlv_type) {
1856 case MARKER_TYPE_INFO:
1857 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1858 marker_info_tlv_template, TRUE)) {
1861 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
1862 memcpy(&mdu->mdu_eh.ether_dhost,
1863 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
1864 memcpy(&mdu->mdu_eh.ether_shost,
1865 lgp->lp_lladdr, ETHER_ADDR_LEN);
1866 error = lagg_enqueue(lp->lp_ifp, m);
1869 case MARKER_TYPE_RESPONSE:
1870 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1871 marker_response_tlv_template, TRUE)) {
1874 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
1875 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
1876 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
1878 /* Verify that it is the last marker we sent out */
1879 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
1880 sizeof(struct lacp_markerinfo)))
1884 lp->lp_flags &= ~LACP_PORT_MARK;
1886 if (lsc->lsc_suppress_distributing) {
1887 /* Check if any ports are waiting for a response */
1888 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
1889 if (lp2->lp_flags & LACP_PORT_MARK) {
1896 /* All interface queues are clear */
1897 LACP_DPRINTF((NULL, "queue flush complete\n"));
1898 lsc->lsc_suppress_distributing = FALSE;
1912 LACP_DPRINTF((lp, "bad marker frame\n"));
1918 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
1919 const struct tlv_template *tmpl, boolean_t check_type)
1921 while (/* CONSTCOND */ 1) {
1922 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
1925 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
1926 tlv->tlv_length != tmpl->tmpl_length) {
1929 if (tmpl->tmpl_type == 0) {
1932 tlv = (const struct tlvhdr *)
1933 ((const char *)tlv + tlv->tlv_length);
1942 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
1944 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
1956 lacp_format_systemid(const struct lacp_systemid *sysid,
1957 char *buf, size_t buflen)
1959 char macbuf[LACP_MACSTR_MAX+1];
1961 snprintf(buf, buflen, "%04X,%s",
1962 ntohs(sysid->lsi_prio),
1963 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
1969 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
1971 snprintf(buf, buflen, "%04X,%04X",
1972 ntohs(portid->lpi_prio),
1973 ntohs(portid->lpi_portno));
1979 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
1981 char sysid[LACP_SYSTEMIDSTR_MAX+1];
1982 char portid[LACP_PORTIDSTR_MAX+1];
1984 snprintf(buf, buflen, "(%s,%04X,%s)",
1985 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
1986 ntohs(peer->lip_key),
1987 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
1993 lacp_format_lagid(const struct lacp_peerinfo *a,
1994 const struct lacp_peerinfo *b, char *buf, size_t buflen)
1996 char astr[LACP_PARTNERSTR_MAX+1];
1997 char bstr[LACP_PARTNERSTR_MAX+1];
2001 * there's a convention to display small numbered peer
2005 if (lacp_compare_peerinfo(a, b) > 0) {
2006 const struct lacp_peerinfo *t;
2014 snprintf(buf, buflen, "[%s,%s]",
2015 lacp_format_partner(a, astr, sizeof(astr)),
2016 lacp_format_partner(b, bstr, sizeof(bstr)));
2022 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
2023 char *buf, size_t buflen)
2029 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
2033 lacp_format_state(uint8_t state, char *buf, size_t buflen)
2035 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
2040 lacp_dump_lacpdu(const struct lacpdu *du)
2042 char buf[LACP_PARTNERSTR_MAX+1];
2043 char buf2[LACP_STATESTR_MAX+1];
2045 printf("actor=%s\n",
2046 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
2047 printf("actor.state=%s\n",
2048 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
2049 printf("partner=%s\n",
2050 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
2051 printf("partner.state=%s\n",
2052 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
2054 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
2058 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
2063 printf("%s: ", lp->lp_ifp->if_xname);