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 int lacp_debug = 0;
191 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad");
192 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_TUN,
193 &lacp_debug, 0, "Enable LACP debug logging (1=debug, 2=trace)");
194 TUNABLE_INT("net.link.lagg.lacp.debug", &lacp_debug);
196 #define LACP_DPRINTF(a) if (lacp_debug & 0x01) { lacp_dprintf a ; }
197 #define LACP_TRACE(a) if (lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
198 #define LACP_TPRINTF(a) if (lacp_debug & 0x04) { lacp_dprintf a ; }
201 * partner administration variables.
202 * XXX should be configurable.
205 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
206 .lip_systemid = { .lsi_prio = 0xffff },
207 .lip_portid = { .lpi_prio = 0xffff },
208 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
209 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
212 static const struct lacp_peerinfo lacp_partner_admin_strict = {
213 .lip_systemid = { .lsi_prio = 0xffff },
214 .lip_portid = { .lpi_prio = 0xffff },
218 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
219 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
220 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
221 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
225 lacp_input(struct lagg_port *lgp, struct mbuf *m)
227 struct lacp_port *lp = LACP_PORT(lgp);
230 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
235 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
237 case SLOWPROTOCOLS_SUBTYPE_LACP:
238 lacp_pdu_input(lp, m);
241 case SLOWPROTOCOLS_SUBTYPE_MARKER:
242 lacp_marker_input(lp, m);
246 /* Not a subtype we are interested in */
251 * lacp_pdu_input: process lacpdu
254 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
256 struct lacp_softc *lsc = lp->lp_lsc;
260 if (m->m_pkthdr.len != sizeof(*du)) {
264 if ((m->m_flags & M_MCAST) == 0) {
268 if (m->m_len < sizeof(*du)) {
269 m = m_pullup(m, sizeof(*du));
275 du = mtod(m, struct lacpdu *);
277 if (memcmp(&du->ldu_eh.ether_dhost,
278 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
283 * ignore the version for compatibility with
284 * the future protocol revisions.
287 if (du->ldu_sph.sph_version != 1) {
293 * ignore tlv types for compatibility with
294 * the future protocol revisions.
296 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
297 lacp_info_tlv_template, FALSE)) {
301 if (lacp_debug > 0) {
302 lacp_dprintf(lp, "lacpdu receive\n");
303 lacp_dump_lacpdu(du);
306 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
307 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
324 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
326 struct lagg_port *lgp = lp->lp_lagg;
327 struct lagg_softc *sc = lgp->lp_softc;
329 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
330 memcpy(&info->lip_systemid.lsi_mac,
331 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
332 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
333 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
334 info->lip_state = lp->lp_state;
338 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
340 struct ifnet *ifp = lp->lp_ifp;
342 /* Fill in the port index and system id (encoded as the MAC) */
343 info->mi_rq_port = htons(ifp->if_index);
344 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
345 info->mi_rq_xid = htonl(0);
349 lacp_xmit_lacpdu(struct lacp_port *lp)
351 struct lagg_port *lgp = lp->lp_lagg;
356 LACP_LOCK_ASSERT(lp->lp_lsc);
358 m = m_gethdr(M_NOWAIT, MT_DATA);
362 m->m_len = m->m_pkthdr.len = sizeof(*du);
364 du = mtod(m, struct lacpdu *);
365 memset(du, 0, sizeof(*du));
367 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
369 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
370 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
372 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
373 du->ldu_sph.sph_version = 1;
375 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
376 du->ldu_actor = lp->lp_actor;
378 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
379 sizeof(du->ldu_partner));
380 du->ldu_partner = lp->lp_partner;
382 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
383 sizeof(du->ldu_collector));
384 du->ldu_collector.lci_maxdelay = 0;
386 if (lacp_debug > 0) {
387 lacp_dprintf(lp, "lacpdu transmit\n");
388 lacp_dump_lacpdu(du);
391 m->m_flags |= M_MCAST;
394 * XXX should use higher priority queue.
395 * otherwise network congestion can break aggregation.
398 error = lagg_enqueue(lp->lp_ifp, m);
403 lacp_xmit_marker(struct lacp_port *lp)
405 struct lagg_port *lgp = lp->lp_lagg;
407 struct markerdu *mdu;
410 LACP_LOCK_ASSERT(lp->lp_lsc);
412 m = m_gethdr(M_NOWAIT, MT_DATA);
416 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
418 mdu = mtod(m, struct markerdu *);
419 memset(mdu, 0, sizeof(*mdu));
421 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
423 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
424 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
426 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
427 mdu->mdu_sph.sph_version = 1;
429 /* Bump the transaction id and copy over the marker info */
430 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
431 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
432 mdu->mdu_info = lp->lp_marker;
434 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
435 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
436 ntohl(mdu->mdu_info.mi_rq_xid)));
438 m->m_flags |= M_MCAST;
439 error = lagg_enqueue(lp->lp_ifp, m);
444 lacp_linkstate(struct lagg_port *lgp)
446 struct lacp_port *lp = LACP_PORT(lgp);
447 struct lacp_softc *lsc = lp->lp_lsc;
448 struct ifnet *ifp = lgp->lp_ifp;
449 struct ifmediareq ifmr;
455 bzero((char *)&ifmr, sizeof(ifmr));
456 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
461 media = ifmr.ifm_active;
462 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
463 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
464 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
465 old_state = lp->lp_state;
466 old_key = lp->lp_key;
468 lp->lp_media = media;
470 * If the port is not an active full duplex Ethernet link then it can
473 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
474 ifp->if_link_state != LINK_STATE_UP) {
475 lacp_port_disable(lp);
477 lacp_port_enable(lp);
479 lp->lp_key = lacp_compose_key(lp);
481 if (old_state != lp->lp_state || old_key != lp->lp_key) {
482 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
483 lp->lp_selected = LACP_UNSELECTED;
491 struct lacp_softc *lsc = arg;
492 struct lacp_port *lp;
494 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
495 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
503 lacp_sm_ptx_tx_schedule(lp);
505 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
509 lacp_port_create(struct lagg_port *lgp)
511 struct lagg_softc *sc = lgp->lp_softc;
512 struct lacp_softc *lsc = LACP_SOFTC(sc);
513 struct lacp_port *lp;
514 struct ifnet *ifp = lgp->lp_ifp;
515 struct sockaddr_dl sdl;
516 struct ifmultiaddr *rifma = NULL;
519 boolean_t active = TRUE; /* XXX should be configurable */
520 boolean_t fast = FALSE; /* XXX should be configurable */
522 bzero((char *)&sdl, sizeof(sdl));
523 sdl.sdl_len = sizeof(sdl);
524 sdl.sdl_family = AF_LINK;
525 sdl.sdl_index = ifp->if_index;
526 sdl.sdl_type = IFT_ETHER;
527 sdl.sdl_alen = ETHER_ADDR_LEN;
529 bcopy(ðermulticastaddr_slowprotocols,
530 LLADDR(&sdl), ETHER_ADDR_LEN);
531 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
533 printf("%s: ADDMULTI failed on %s\n", __func__, lgp->lp_ifname);
537 lp = malloc(sizeof(struct lacp_port),
538 M_DEVBUF, M_NOWAIT|M_ZERO);
543 lgp->lp_psc = (caddr_t)lp;
549 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
551 lacp_fill_actorinfo(lp, &lp->lp_actor);
552 lacp_fill_markerinfo(lp, &lp->lp_marker);
554 (active ? LACP_STATE_ACTIVITY : 0) |
555 (fast ? LACP_STATE_TIMEOUT : 0);
556 lp->lp_aggregator = NULL;
557 lacp_sm_rx_set_expired(lp);
565 lacp_port_destroy(struct lagg_port *lgp)
567 struct lacp_port *lp = LACP_PORT(lgp);
568 struct lacp_softc *lsc = lp->lp_lsc;
572 for (i = 0; i < LACP_NTIMER; i++) {
573 LACP_TIMER_DISARM(lp, i);
576 lacp_disable_collecting(lp);
577 lacp_disable_distributing(lp);
580 /* The address may have already been removed by if_purgemaddrs() */
581 if (!lgp->lp_detaching)
582 if_delmulti_ifma(lp->lp_ifma);
584 LIST_REMOVE(lp, lp_next);
590 lacp_req(struct lagg_softc *sc, caddr_t data)
592 struct lacp_opreq *req = (struct lacp_opreq *)data;
593 struct lacp_softc *lsc = LACP_SOFTC(sc);
594 struct lacp_aggregator *la;
596 bzero(req, sizeof(struct lacp_opreq));
599 * If the LACP softc is NULL, return with the opreq structure full of
600 * zeros. It is normal for the softc to be NULL while the lagg is
606 la = lsc->lsc_active_aggregator;
609 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
610 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
612 req->actor_key = ntohs(la->la_actor.lip_key);
613 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
614 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
615 req->actor_state = la->la_actor.lip_state;
617 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
618 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
620 req->partner_key = ntohs(la->la_partner.lip_key);
621 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
622 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
623 req->partner_state = la->la_partner.lip_state;
629 lacp_portreq(struct lagg_port *lgp, caddr_t data)
631 struct lacp_opreq *req = (struct lacp_opreq *)data;
632 struct lacp_port *lp = LACP_PORT(lgp);
633 struct lacp_softc *lsc = lp->lp_lsc;
636 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
637 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
639 req->actor_key = ntohs(lp->lp_actor.lip_key);
640 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
641 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
642 req->actor_state = lp->lp_actor.lip_state;
644 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
645 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
647 req->partner_key = ntohs(lp->lp_partner.lip_key);
648 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
649 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
650 req->partner_state = lp->lp_partner.lip_state;
655 lacp_disable_collecting(struct lacp_port *lp)
657 LACP_DPRINTF((lp, "collecting disabled\n"));
658 lp->lp_state &= ~LACP_STATE_COLLECTING;
662 lacp_enable_collecting(struct lacp_port *lp)
664 LACP_DPRINTF((lp, "collecting enabled\n"));
665 lp->lp_state |= LACP_STATE_COLLECTING;
669 lacp_disable_distributing(struct lacp_port *lp)
671 struct lacp_aggregator *la = lp->lp_aggregator;
672 struct lacp_softc *lsc = lp->lp_lsc;
673 struct lagg_softc *sc = lsc->lsc_softc;
674 char buf[LACP_LAGIDSTR_MAX+1];
676 LACP_LOCK_ASSERT(lsc);
678 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
682 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
683 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
684 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
686 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
688 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
689 la->la_nports, la->la_nports - 1));
691 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
693 sc->sc_active = la->la_nports;
695 if (lsc->lsc_active_aggregator == la) {
696 lacp_suppress_distributing(lsc, la);
697 lacp_select_active_aggregator(lsc);
698 /* regenerate the port map, the active aggregator has changed */
699 lacp_update_portmap(lsc);
702 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
706 lacp_enable_distributing(struct lacp_port *lp)
708 struct lacp_aggregator *la = lp->lp_aggregator;
709 struct lacp_softc *lsc = lp->lp_lsc;
710 struct lagg_softc *sc = lsc->lsc_softc;
711 char buf[LACP_LAGIDSTR_MAX+1];
713 LACP_LOCK_ASSERT(lsc);
715 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
719 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
721 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
722 la->la_nports, la->la_nports + 1));
724 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
725 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
727 sc->sc_active = la->la_nports;
729 lp->lp_state |= LACP_STATE_DISTRIBUTING;
731 if (lsc->lsc_active_aggregator == la) {
732 lacp_suppress_distributing(lsc, la);
733 lacp_update_portmap(lsc);
735 /* try to become the active aggregator */
736 lacp_select_active_aggregator(lsc);
740 lacp_transit_expire(void *vp)
742 struct lacp_softc *lsc = vp;
744 LACP_LOCK_ASSERT(lsc);
748 lsc->lsc_suppress_distributing = FALSE;
752 lacp_attach_sysctl(struct lacp_softc *lsc, struct sysctl_oid *p_oid)
754 struct lagg_softc *sc = lsc->lsc_softc;
756 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(p_oid), OID_AUTO,
759 &lsc->lsc_strict_mode,
760 lsc->lsc_strict_mode,
761 "Enable LACP strict mode");
765 lacp_attach_sysctl_debug(struct lacp_softc *lsc, struct sysctl_oid *p_oid)
767 struct lagg_softc *sc = lsc->lsc_softc;
768 struct sysctl_oid *oid;
770 /* Create a child of the parent lagg interface */
771 oid = SYSCTL_ADD_NODE(&sc->ctx, SYSCTL_CHILDREN(p_oid),
772 OID_AUTO, "debug", CTLFLAG_RD, NULL, "DEBUG");
774 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
777 &lsc->lsc_debug.lsc_rx_test,
778 lsc->lsc_debug.lsc_rx_test,
779 "Bitmap of if_dunit entries to drop RX frames for");
780 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
783 &lsc->lsc_debug.lsc_tx_test,
784 lsc->lsc_debug.lsc_tx_test,
785 "Bitmap of if_dunit entries to drop TX frames for");
789 lacp_attach(struct lagg_softc *sc)
791 struct lacp_softc *lsc;
792 struct sysctl_oid *oid;
794 lsc = malloc(sizeof(struct lacp_softc),
795 M_DEVBUF, M_NOWAIT|M_ZERO);
799 sc->sc_psc = (caddr_t)lsc;
802 lsc->lsc_hashkey = arc4random();
803 lsc->lsc_active_aggregator = NULL;
804 lsc->lsc_strict_mode = 1;
806 TAILQ_INIT(&lsc->lsc_aggregators);
807 LIST_INIT(&lsc->lsc_ports);
809 /* Create a child of the parent lagg interface */
810 oid = SYSCTL_ADD_NODE(&sc->ctx, SYSCTL_CHILDREN(sc->sc_oid),
811 OID_AUTO, "lacp", CTLFLAG_RD, NULL, "LACP");
813 /* Attach sysctl nodes */
814 lacp_attach_sysctl(lsc, oid);
815 lacp_attach_sysctl_debug(lsc, oid);
817 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
818 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
820 /* if the lagg is already up then do the same */
821 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
828 lacp_detach(struct lagg_softc *sc)
830 struct lacp_softc *lsc = LACP_SOFTC(sc);
832 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
833 ("aggregators still active"));
834 KASSERT(lsc->lsc_active_aggregator == NULL,
835 ("aggregator still attached"));
838 callout_drain(&lsc->lsc_transit_callout);
839 callout_drain(&lsc->lsc_callout);
841 LACP_LOCK_DESTROY(lsc);
847 lacp_init(struct lagg_softc *sc)
849 struct lacp_softc *lsc = LACP_SOFTC(sc);
852 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
857 lacp_stop(struct lagg_softc *sc)
859 struct lacp_softc *lsc = LACP_SOFTC(sc);
862 callout_stop(&lsc->lsc_transit_callout);
863 callout_stop(&lsc->lsc_callout);
868 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
870 struct lacp_softc *lsc = LACP_SOFTC(sc);
871 struct lacp_portmap *pm;
872 struct lacp_port *lp;
875 if (__predict_false(lsc->lsc_suppress_distributing)) {
876 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
880 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
881 if (pm->pm_count == 0) {
882 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
886 if (sc->use_flowid && (m->m_flags & M_FLOWID))
887 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
889 hash = lagg_hashmbuf(sc, m, lsc->lsc_hashkey);
890 hash %= pm->pm_count;
891 lp = pm->pm_map[hash];
893 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
894 ("aggregated port is not distributing"));
896 return (lp->lp_lagg);
899 * lacp_suppress_distributing: drop transmit packets for a while
900 * to preserve packet ordering.
904 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
906 struct lacp_port *lp;
908 if (lsc->lsc_active_aggregator != la) {
914 lsc->lsc_suppress_distributing = TRUE;
916 /* send a marker frame down each port to verify the queues are empty */
917 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
918 lp->lp_flags |= LACP_PORT_MARK;
919 lacp_xmit_marker(lp);
922 /* set a timeout for the marker frames */
923 callout_reset(&lsc->lsc_transit_callout,
924 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
928 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
929 const struct lacp_peerinfo *b)
931 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
935 lacp_compare_systemid(const struct lacp_systemid *a,
936 const struct lacp_systemid *b)
938 return (memcmp(a, b, sizeof(*a)));
943 lacp_compare_portid(const struct lacp_portid *a,
944 const struct lacp_portid *b)
946 return (memcmp(a, b, sizeof(*a)));
951 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
953 struct lacp_port *lp;
956 lp = TAILQ_FIRST(&la->la_ports);
961 speed = ifmedia_baudrate(lp->lp_media);
962 speed *= la->la_nports;
964 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
965 lp->lp_media, la->la_nports));
972 * lacp_select_active_aggregator: select an aggregator to be used to transmit
973 * packets from lagg(4) interface.
977 lacp_select_active_aggregator(struct lacp_softc *lsc)
979 struct lacp_aggregator *la;
980 struct lacp_aggregator *best_la = NULL;
981 uint64_t best_speed = 0;
982 char buf[LACP_LAGIDSTR_MAX+1];
986 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
989 if (la->la_nports == 0) {
993 speed = lacp_aggregator_bandwidth(la);
994 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
995 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
996 speed, la->la_nports));
998 /* This aggregator is chosen if
999 * the partner has a better system priority
1000 * or, the total aggregated speed is higher
1001 * or, it is already the chosen aggregator
1003 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
1004 LACP_SYS_PRI(best_la->la_partner)) ||
1005 speed > best_speed ||
1006 (speed == best_speed &&
1007 la == lsc->lsc_active_aggregator)) {
1013 KASSERT(best_la == NULL || best_la->la_nports > 0,
1014 ("invalid aggregator refcnt"));
1015 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
1016 ("invalid aggregator list"));
1018 if (lsc->lsc_active_aggregator != best_la) {
1019 LACP_DPRINTF((NULL, "active aggregator changed\n"));
1020 LACP_DPRINTF((NULL, "old %s\n",
1021 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
1022 buf, sizeof(buf))));
1024 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
1026 LACP_DPRINTF((NULL, "new %s\n",
1027 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
1029 if (lsc->lsc_active_aggregator != best_la) {
1030 lsc->lsc_active_aggregator = best_la;
1031 lacp_update_portmap(lsc);
1033 lacp_suppress_distributing(lsc, best_la);
1039 * Updated the inactive portmap array with the new list of ports and
1043 lacp_update_portmap(struct lacp_softc *lsc)
1045 struct lagg_softc *sc = lsc->lsc_softc;
1046 struct lacp_aggregator *la;
1047 struct lacp_portmap *p;
1048 struct lacp_port *lp;
1053 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1054 p = &lsc->lsc_pmap[newmap];
1055 la = lsc->lsc_active_aggregator;
1057 bzero(p, sizeof(struct lacp_portmap));
1059 if (la != NULL && la->la_nports > 0) {
1060 p->pm_count = la->la_nports;
1062 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
1063 p->pm_map[i++] = lp;
1064 KASSERT(i == p->pm_count, ("Invalid port count"));
1065 speed = lacp_aggregator_bandwidth(la);
1067 sc->sc_ifp->if_baudrate = speed;
1069 /* switch the active portmap over */
1070 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1071 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1073 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1077 lacp_compose_key(struct lacp_port *lp)
1079 struct lagg_port *lgp = lp->lp_lagg;
1080 struct lagg_softc *sc = lgp->lp_softc;
1081 u_int media = lp->lp_media;
1084 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1087 * non-aggregatable links should have unique keys.
1089 * XXX this isn't really unique as if_index is 16 bit.
1092 /* bit 0..14: (some bits of) if_index of this port */
1093 key = lp->lp_ifp->if_index;
1097 u_int subtype = IFM_SUBTYPE(media);
1099 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1100 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1102 /* bit 0..4: IFM_SUBTYPE modulo speed */
1127 case IFM_10G_TWINAX:
1128 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;
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);