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>
35 #include <sys/eventhandler.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <sys/kernel.h> /* hz */
40 #include <sys/socket.h> /* for net/if.h */
41 #include <sys/sockio.h>
42 #include <sys/sysctl.h>
43 #include <machine/stdarg.h>
45 #include <sys/rwlock.h>
46 #include <sys/taskqueue.h>
49 #include <net/if_var.h>
50 #include <net/if_dl.h>
51 #include <net/ethernet.h>
52 #include <net/if_media.h>
53 #include <net/if_types.h>
55 #include <net/if_lagg.h>
56 #include <net/ieee8023ad_lacp.h>
59 * actor system priority and port priority.
60 * XXX should be configurable.
63 #define LACP_SYSTEM_PRIO 0x8000
64 #define LACP_PORT_PRIO 0x8000
66 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
67 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
69 static const struct tlv_template lacp_info_tlv_template[] = {
70 { LACP_TYPE_ACTORINFO,
71 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
72 { LACP_TYPE_PARTNERINFO,
73 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
74 { LACP_TYPE_COLLECTORINFO,
75 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
79 static const struct tlv_template marker_info_tlv_template[] = {
81 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
85 static const struct tlv_template marker_response_tlv_template[] = {
86 { MARKER_TYPE_RESPONSE,
87 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
91 typedef void (*lacp_timer_func_t)(struct lacp_port *);
93 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
94 static void lacp_fill_markerinfo(struct lacp_port *,
95 struct lacp_markerinfo *);
97 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
98 static void lacp_suppress_distributing(struct lacp_softc *,
99 struct lacp_aggregator *);
100 static void lacp_transit_expire(void *);
101 static void lacp_update_portmap(struct lacp_softc *);
102 static void lacp_select_active_aggregator(struct lacp_softc *);
103 static uint16_t lacp_compose_key(struct lacp_port *);
104 static int tlv_check(const void *, size_t, const struct tlvhdr *,
105 const struct tlv_template *, boolean_t);
106 static void lacp_tick(void *);
108 static void lacp_fill_aggregator_id(struct lacp_aggregator *,
109 const struct lacp_port *);
110 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
111 const struct lacp_peerinfo *);
112 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
113 const struct lacp_port *);
114 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
115 const struct lacp_peerinfo *);
117 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
119 static void lacp_aggregator_addref(struct lacp_softc *,
120 struct lacp_aggregator *);
121 static void lacp_aggregator_delref(struct lacp_softc *,
122 struct lacp_aggregator *);
124 /* receive machine */
126 static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
127 static int lacp_marker_input(struct lacp_port *, struct mbuf *);
128 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
129 static void lacp_sm_rx_timer(struct lacp_port *);
130 static void lacp_sm_rx_set_expired(struct lacp_port *);
131 static void lacp_sm_rx_update_ntt(struct lacp_port *,
132 const struct lacpdu *);
133 static void lacp_sm_rx_record_pdu(struct lacp_port *,
134 const struct lacpdu *);
135 static void lacp_sm_rx_update_selected(struct lacp_port *,
136 const struct lacpdu *);
137 static void lacp_sm_rx_record_default(struct lacp_port *);
138 static void lacp_sm_rx_update_default_selected(struct lacp_port *);
139 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
140 const struct lacp_peerinfo *);
144 static void lacp_sm_mux(struct lacp_port *);
145 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
146 static void lacp_sm_mux_timer(struct lacp_port *);
148 /* periodic transmit machine */
150 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
151 static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
152 static void lacp_sm_ptx_timer(struct lacp_port *);
154 /* transmit machine */
156 static void lacp_sm_tx(struct lacp_port *);
157 static void lacp_sm_assert_ntt(struct lacp_port *);
159 static void lacp_run_timers(struct lacp_port *);
160 static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
161 const struct lacp_peerinfo *);
162 static int lacp_compare_systemid(const struct lacp_systemid *,
163 const struct lacp_systemid *);
164 static void lacp_port_enable(struct lacp_port *);
165 static void lacp_port_disable(struct lacp_port *);
166 static void lacp_select(struct lacp_port *);
167 static void lacp_unselect(struct lacp_port *);
168 static void lacp_disable_collecting(struct lacp_port *);
169 static void lacp_enable_collecting(struct lacp_port *);
170 static void lacp_disable_distributing(struct lacp_port *);
171 static void lacp_enable_distributing(struct lacp_port *);
172 static int lacp_xmit_lacpdu(struct lacp_port *);
173 static int lacp_xmit_marker(struct lacp_port *);
177 static void lacp_dump_lacpdu(const struct lacpdu *);
178 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
180 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
181 const struct lacp_peerinfo *, char *, size_t);
182 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
184 static const char *lacp_format_state(uint8_t, char *, size_t);
185 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
186 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
188 static const char *lacp_format_portid(const struct lacp_portid *, char *,
190 static void lacp_dprintf(const struct lacp_port *, const char *, ...)
191 __attribute__((__format__(__printf__, 2, 3)));
193 static VNET_DEFINE(int, lacp_debug);
194 #define V_lacp_debug VNET(lacp_debug)
195 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad");
196 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
197 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
199 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
200 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
201 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
204 * partner administration variables.
205 * XXX should be configurable.
208 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
209 .lip_systemid = { .lsi_prio = 0xffff },
210 .lip_portid = { .lpi_prio = 0xffff },
211 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
212 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
215 static const struct lacp_peerinfo lacp_partner_admin_strict = {
216 .lip_systemid = { .lsi_prio = 0xffff },
217 .lip_portid = { .lpi_prio = 0xffff },
221 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
222 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
223 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
224 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
228 lacp_input(struct lagg_port *lgp, struct mbuf *m)
230 struct lacp_port *lp = LACP_PORT(lgp);
233 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
238 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
240 case SLOWPROTOCOLS_SUBTYPE_LACP:
241 lacp_pdu_input(lp, m);
244 case SLOWPROTOCOLS_SUBTYPE_MARKER:
245 lacp_marker_input(lp, m);
249 /* Not a subtype we are interested in */
254 * lacp_pdu_input: process lacpdu
257 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
259 struct lacp_softc *lsc = lp->lp_lsc;
263 if (m->m_pkthdr.len != sizeof(*du)) {
267 if ((m->m_flags & M_MCAST) == 0) {
271 if (m->m_len < sizeof(*du)) {
272 m = m_pullup(m, sizeof(*du));
278 du = mtod(m, struct lacpdu *);
280 if (memcmp(&du->ldu_eh.ether_dhost,
281 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
286 * ignore the version for compatibility with
287 * the future protocol revisions.
290 if (du->ldu_sph.sph_version != 1) {
296 * ignore tlv types for compatibility with
297 * the future protocol revisions.
299 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
300 lacp_info_tlv_template, FALSE)) {
304 if (V_lacp_debug > 0) {
305 lacp_dprintf(lp, "lacpdu receive\n");
306 lacp_dump_lacpdu(du);
309 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
310 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
327 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
329 struct lagg_port *lgp = lp->lp_lagg;
330 struct lagg_softc *sc = lgp->lp_softc;
332 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
333 memcpy(&info->lip_systemid.lsi_mac,
334 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
335 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
336 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
337 info->lip_state = lp->lp_state;
341 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
343 struct ifnet *ifp = lp->lp_ifp;
345 /* Fill in the port index and system id (encoded as the MAC) */
346 info->mi_rq_port = htons(ifp->if_index);
347 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
348 info->mi_rq_xid = htonl(0);
352 lacp_xmit_lacpdu(struct lacp_port *lp)
354 struct lagg_port *lgp = lp->lp_lagg;
359 LACP_LOCK_ASSERT(lp->lp_lsc);
361 m = m_gethdr(M_NOWAIT, MT_DATA);
365 m->m_len = m->m_pkthdr.len = sizeof(*du);
367 du = mtod(m, struct lacpdu *);
368 memset(du, 0, sizeof(*du));
370 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
372 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
373 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
375 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
376 du->ldu_sph.sph_version = 1;
378 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
379 du->ldu_actor = lp->lp_actor;
381 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
382 sizeof(du->ldu_partner));
383 du->ldu_partner = lp->lp_partner;
385 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
386 sizeof(du->ldu_collector));
387 du->ldu_collector.lci_maxdelay = 0;
389 if (V_lacp_debug > 0) {
390 lacp_dprintf(lp, "lacpdu transmit\n");
391 lacp_dump_lacpdu(du);
394 m->m_flags |= M_MCAST;
397 * XXX should use higher priority queue.
398 * otherwise network congestion can break aggregation.
401 error = lagg_enqueue(lp->lp_ifp, m);
406 lacp_xmit_marker(struct lacp_port *lp)
408 struct lagg_port *lgp = lp->lp_lagg;
410 struct markerdu *mdu;
413 LACP_LOCK_ASSERT(lp->lp_lsc);
415 m = m_gethdr(M_NOWAIT, MT_DATA);
419 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
421 mdu = mtod(m, struct markerdu *);
422 memset(mdu, 0, sizeof(*mdu));
424 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
426 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
427 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
429 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
430 mdu->mdu_sph.sph_version = 1;
432 /* Bump the transaction id and copy over the marker info */
433 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
434 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
435 mdu->mdu_info = lp->lp_marker;
437 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
438 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
439 ntohl(mdu->mdu_info.mi_rq_xid)));
441 m->m_flags |= M_MCAST;
442 error = lagg_enqueue(lp->lp_ifp, m);
447 lacp_linkstate(struct lagg_port *lgp)
449 struct lacp_port *lp = LACP_PORT(lgp);
450 struct lacp_softc *lsc = lp->lp_lsc;
451 struct ifnet *ifp = lgp->lp_ifp;
452 struct ifmediareq ifmr;
458 bzero((char *)&ifmr, sizeof(ifmr));
459 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
464 media = ifmr.ifm_active;
465 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
466 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
467 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
468 old_state = lp->lp_state;
469 old_key = lp->lp_key;
471 lp->lp_media = media;
473 * If the port is not an active full duplex Ethernet link then it can
476 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
477 ifp->if_link_state != LINK_STATE_UP) {
478 lacp_port_disable(lp);
480 lacp_port_enable(lp);
482 lp->lp_key = lacp_compose_key(lp);
484 if (old_state != lp->lp_state || old_key != lp->lp_key) {
485 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
486 lp->lp_selected = LACP_UNSELECTED;
494 struct lacp_softc *lsc = arg;
495 struct lacp_port *lp;
497 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
498 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
501 CURVNET_SET(lp->lp_ifp->if_vnet);
507 lacp_sm_ptx_tx_schedule(lp);
510 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
514 lacp_port_create(struct lagg_port *lgp)
516 struct lagg_softc *sc = lgp->lp_softc;
517 struct lacp_softc *lsc = LACP_SOFTC(sc);
518 struct lacp_port *lp;
519 struct ifnet *ifp = lgp->lp_ifp;
520 struct sockaddr_dl sdl;
521 struct ifmultiaddr *rifma = NULL;
524 boolean_t active = TRUE; /* XXX should be configurable */
525 boolean_t fast = FALSE; /* XXX should be configurable */
527 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
528 sdl.sdl_alen = ETHER_ADDR_LEN;
530 bcopy(ðermulticastaddr_slowprotocols,
531 LLADDR(&sdl), ETHER_ADDR_LEN);
532 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
534 printf("%s: ADDMULTI failed on %s\n", __func__,
535 lgp->lp_ifp->if_xname);
539 lp = malloc(sizeof(struct lacp_port),
540 M_DEVBUF, M_NOWAIT|M_ZERO);
551 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
553 lacp_fill_actorinfo(lp, &lp->lp_actor);
554 lacp_fill_markerinfo(lp, &lp->lp_marker);
556 (active ? LACP_STATE_ACTIVITY : 0) |
557 (fast ? LACP_STATE_TIMEOUT : 0);
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, void *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, void *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);
766 lsc->lsc_hashkey = arc4random();
767 lsc->lsc_active_aggregator = NULL;
768 lsc->lsc_strict_mode = 1;
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);
799 lacp_init(struct lagg_softc *sc)
801 struct lacp_softc *lsc = LACP_SOFTC(sc);
804 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
809 lacp_stop(struct lagg_softc *sc)
811 struct lacp_softc *lsc = LACP_SOFTC(sc);
814 callout_stop(&lsc->lsc_transit_callout);
815 callout_stop(&lsc->lsc_callout);
820 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
822 struct lacp_softc *lsc = LACP_SOFTC(sc);
823 struct lacp_portmap *pm;
824 struct lacp_port *lp;
827 if (__predict_false(lsc->lsc_suppress_distributing)) {
828 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
832 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
833 if (pm->pm_count == 0) {
834 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
838 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && (m->m_flags & M_FLOWID))
839 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
841 hash = lagg_hashmbuf(sc, m, lsc->lsc_hashkey);
842 hash %= pm->pm_count;
843 lp = pm->pm_map[hash];
845 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
846 ("aggregated port is not distributing"));
848 return (lp->lp_lagg);
851 * lacp_suppress_distributing: drop transmit packets for a while
852 * to preserve packet ordering.
856 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
858 struct lacp_port *lp;
860 if (lsc->lsc_active_aggregator != la) {
866 lsc->lsc_suppress_distributing = TRUE;
868 /* send a marker frame down each port to verify the queues are empty */
869 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
870 lp->lp_flags |= LACP_PORT_MARK;
871 lacp_xmit_marker(lp);
874 /* set a timeout for the marker frames */
875 callout_reset(&lsc->lsc_transit_callout,
876 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
880 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
881 const struct lacp_peerinfo *b)
883 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
887 lacp_compare_systemid(const struct lacp_systemid *a,
888 const struct lacp_systemid *b)
890 return (memcmp(a, b, sizeof(*a)));
895 lacp_compare_portid(const struct lacp_portid *a,
896 const struct lacp_portid *b)
898 return (memcmp(a, b, sizeof(*a)));
903 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
905 struct lacp_port *lp;
908 lp = TAILQ_FIRST(&la->la_ports);
913 speed = ifmedia_baudrate(lp->lp_media);
914 speed *= la->la_nports;
916 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
917 lp->lp_media, la->la_nports));
924 * lacp_select_active_aggregator: select an aggregator to be used to transmit
925 * packets from lagg(4) interface.
929 lacp_select_active_aggregator(struct lacp_softc *lsc)
931 struct lacp_aggregator *la;
932 struct lacp_aggregator *best_la = NULL;
933 uint64_t best_speed = 0;
934 char buf[LACP_LAGIDSTR_MAX+1];
938 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
941 if (la->la_nports == 0) {
945 speed = lacp_aggregator_bandwidth(la);
946 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
947 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
948 speed, la->la_nports));
951 * This aggregator is chosen if the partner has a better
952 * system priority or, the total aggregated speed is higher
953 * or, it is already the chosen aggregator
955 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
956 LACP_SYS_PRI(best_la->la_partner)) ||
957 speed > best_speed ||
958 (speed == best_speed &&
959 la == lsc->lsc_active_aggregator)) {
965 KASSERT(best_la == NULL || best_la->la_nports > 0,
966 ("invalid aggregator refcnt"));
967 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
968 ("invalid aggregator list"));
970 if (lsc->lsc_active_aggregator != best_la) {
971 LACP_DPRINTF((NULL, "active aggregator changed\n"));
972 LACP_DPRINTF((NULL, "old %s\n",
973 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
976 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
978 LACP_DPRINTF((NULL, "new %s\n",
979 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
981 if (lsc->lsc_active_aggregator != best_la) {
982 lsc->lsc_active_aggregator = best_la;
983 lacp_update_portmap(lsc);
985 lacp_suppress_distributing(lsc, best_la);
991 * Updated the inactive portmap array with the new list of ports and
995 lacp_update_portmap(struct lacp_softc *lsc)
997 struct lagg_softc *sc = lsc->lsc_softc;
998 struct lacp_aggregator *la;
999 struct lacp_portmap *p;
1000 struct lacp_port *lp;
1005 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1006 p = &lsc->lsc_pmap[newmap];
1007 la = lsc->lsc_active_aggregator;
1009 bzero(p, sizeof(struct lacp_portmap));
1011 if (la != NULL && la->la_nports > 0) {
1012 p->pm_count = la->la_nports;
1014 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
1015 p->pm_map[i++] = lp;
1016 KASSERT(i == p->pm_count, ("Invalid port count"));
1017 speed = lacp_aggregator_bandwidth(la);
1019 sc->sc_ifp->if_baudrate = speed;
1021 /* switch the active portmap over */
1022 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1023 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1025 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1029 lacp_compose_key(struct lacp_port *lp)
1031 struct lagg_port *lgp = lp->lp_lagg;
1032 struct lagg_softc *sc = lgp->lp_softc;
1033 u_int media = lp->lp_media;
1036 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1039 * non-aggregatable links should have unique keys.
1041 * XXX this isn't really unique as if_index is 16 bit.
1044 /* bit 0..14: (some bits of) if_index of this port */
1045 key = lp->lp_ifp->if_index;
1049 u_int subtype = IFM_SUBTYPE(media);
1051 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1052 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1054 /* bit 0..4: IFM_SUBTYPE modulo speed */
1079 case IFM_10G_TWINAX:
1080 case IFM_10G_TWINAX_LONG:
1093 /* bit 5..14: (some bits of) if_index of lagg device */
1094 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1097 return (htons(key));
1101 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1103 char buf[LACP_LAGIDSTR_MAX+1];
1105 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1107 lacp_format_lagid(&la->la_actor, &la->la_partner,
1109 la->la_refcnt, la->la_refcnt + 1));
1111 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1113 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1117 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1119 char buf[LACP_LAGIDSTR_MAX+1];
1121 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1123 lacp_format_lagid(&la->la_actor, &la->la_partner,
1125 la->la_refcnt, la->la_refcnt - 1));
1127 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1129 if (la->la_refcnt > 0) {
1133 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1134 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1136 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1142 * lacp_aggregator_get: allocate an aggregator.
1145 static struct lacp_aggregator *
1146 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1148 struct lacp_aggregator *la;
1150 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1154 TAILQ_INIT(&la->la_ports);
1156 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1163 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1167 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1169 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1170 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1172 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1176 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1177 const struct lacp_peerinfo *lpi_port)
1179 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1180 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1181 lpi_aggr->lip_key = lpi_port->lip_key;
1185 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1189 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1190 const struct lacp_port *lp)
1192 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1193 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1197 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1201 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1205 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1213 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1214 const struct lacp_peerinfo *b)
1216 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1217 sizeof(a->lip_systemid))) {
1221 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1229 lacp_port_enable(struct lacp_port *lp)
1231 lp->lp_state |= LACP_STATE_AGGREGATION;
1235 lacp_port_disable(struct lacp_port *lp)
1237 lacp_set_mux(lp, LACP_MUX_DETACHED);
1239 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1240 lp->lp_selected = LACP_UNSELECTED;
1241 lacp_sm_rx_record_default(lp);
1242 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1243 lp->lp_state &= ~LACP_STATE_EXPIRED;
1247 * lacp_select: select an aggregator. create one if necessary.
1250 lacp_select(struct lacp_port *lp)
1252 struct lacp_softc *lsc = lp->lp_lsc;
1253 struct lacp_aggregator *la;
1254 char buf[LACP_LAGIDSTR_MAX+1];
1256 if (lp->lp_aggregator) {
1260 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1261 ("timer_wait_while still active"));
1263 LACP_DPRINTF((lp, "port lagid=%s\n",
1264 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1265 buf, sizeof(buf))));
1267 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1268 if (lacp_aggregator_is_compatible(la, lp)) {
1274 la = lacp_aggregator_get(lsc, lp);
1276 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1279 * will retry on the next tick.
1284 lacp_fill_aggregator_id(la, lp);
1285 LACP_DPRINTF((lp, "aggregator created\n"));
1287 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1288 if (la->la_refcnt == LACP_MAX_PORTS)
1290 lacp_aggregator_addref(lsc, la);
1293 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1294 lacp_format_lagid(&la->la_actor, &la->la_partner,
1295 buf, sizeof(buf))));
1297 lp->lp_aggregator = la;
1298 lp->lp_selected = LACP_SELECTED;
1302 * lacp_unselect: finish unselect/detach process.
1306 lacp_unselect(struct lacp_port *lp)
1308 struct lacp_softc *lsc = lp->lp_lsc;
1309 struct lacp_aggregator *la = lp->lp_aggregator;
1311 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1312 ("timer_wait_while still active"));
1318 lp->lp_aggregator = NULL;
1319 lacp_aggregator_delref(lsc, la);
1325 lacp_sm_mux(struct lacp_port *lp)
1327 struct lagg_port *lgp = lp->lp_lagg;
1328 struct lagg_softc *sc = lgp->lp_softc;
1329 enum lacp_mux_state new_state;
1331 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1332 boolean_t p_collecting =
1333 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1334 enum lacp_selected selected = lp->lp_selected;
1335 struct lacp_aggregator *la;
1337 if (V_lacp_debug > 1)
1338 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
1339 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
1340 lp->lp_mux_state, selected, p_sync, p_collecting);
1343 la = lp->lp_aggregator;
1344 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1345 ("MUX not detached"));
1346 new_state = lp->lp_mux_state;
1347 switch (lp->lp_mux_state) {
1348 case LACP_MUX_DETACHED:
1349 if (selected != LACP_UNSELECTED) {
1350 new_state = LACP_MUX_WAITING;
1353 case LACP_MUX_WAITING:
1354 KASSERT(la->la_pending > 0 ||
1355 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1356 ("timer_wait_while still active"));
1357 if (selected == LACP_SELECTED && la->la_pending == 0) {
1358 new_state = LACP_MUX_ATTACHED;
1359 } else if (selected == LACP_UNSELECTED) {
1360 new_state = LACP_MUX_DETACHED;
1363 case LACP_MUX_ATTACHED:
1364 if (selected == LACP_SELECTED && p_sync) {
1365 new_state = LACP_MUX_COLLECTING;
1366 } else if (selected != LACP_SELECTED) {
1367 new_state = LACP_MUX_DETACHED;
1370 case LACP_MUX_COLLECTING:
1371 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1372 new_state = LACP_MUX_DISTRIBUTING;
1373 } else if (selected != LACP_SELECTED || !p_sync) {
1374 new_state = LACP_MUX_ATTACHED;
1377 case LACP_MUX_DISTRIBUTING:
1378 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1379 new_state = LACP_MUX_COLLECTING;
1380 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
1385 panic("%s: unknown state", __func__);
1388 if (lp->lp_mux_state == new_state) {
1392 lacp_set_mux(lp, new_state);
1397 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1399 struct lacp_aggregator *la = lp->lp_aggregator;
1401 if (lp->lp_mux_state == new_state) {
1405 switch (new_state) {
1406 case LACP_MUX_DETACHED:
1407 lp->lp_state &= ~LACP_STATE_SYNC;
1408 lacp_disable_distributing(lp);
1409 lacp_disable_collecting(lp);
1410 lacp_sm_assert_ntt(lp);
1412 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1413 KASSERT(la->la_pending > 0,
1414 ("timer_wait_while not active"));
1417 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1420 case LACP_MUX_WAITING:
1421 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1422 LACP_AGGREGATE_WAIT_TIME);
1425 case LACP_MUX_ATTACHED:
1426 lp->lp_state |= LACP_STATE_SYNC;
1427 lacp_disable_collecting(lp);
1428 lacp_sm_assert_ntt(lp);
1430 case LACP_MUX_COLLECTING:
1431 lacp_enable_collecting(lp);
1432 lacp_disable_distributing(lp);
1433 lacp_sm_assert_ntt(lp);
1435 case LACP_MUX_DISTRIBUTING:
1436 lacp_enable_distributing(lp);
1439 panic("%s: unknown state", __func__);
1442 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1444 lp->lp_mux_state = new_state;
1448 lacp_sm_mux_timer(struct lacp_port *lp)
1450 struct lacp_aggregator *la = lp->lp_aggregator;
1451 char buf[LACP_LAGIDSTR_MAX+1];
1453 KASSERT(la->la_pending > 0, ("no pending event"));
1455 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1456 lacp_format_lagid(&la->la_actor, &la->la_partner,
1458 la->la_pending, la->la_pending - 1));
1463 /* periodic transmit machine */
1466 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1468 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1469 LACP_STATE_TIMEOUT)) {
1473 LACP_DPRINTF((lp, "partner timeout changed\n"));
1476 * FAST_PERIODIC -> SLOW_PERIODIC
1478 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1480 * let lacp_sm_ptx_tx_schedule to update timeout.
1483 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1486 * if timeout has been shortened, assert NTT.
1489 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1490 lacp_sm_assert_ntt(lp);
1495 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1499 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1500 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1506 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1510 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1514 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1515 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1517 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1521 lacp_sm_ptx_timer(struct lacp_port *lp)
1523 lacp_sm_assert_ntt(lp);
1527 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1532 * check LACP_DISABLED first
1535 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1540 * check loopback condition.
1543 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1544 &lp->lp_actor.lip_systemid)) {
1549 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1552 lacp_sm_rx_update_selected(lp, du);
1553 lacp_sm_rx_update_ntt(lp, du);
1554 lacp_sm_rx_record_pdu(lp, du);
1556 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1557 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1558 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1560 lp->lp_state &= ~LACP_STATE_EXPIRED;
1563 * kick transmit machine without waiting the next tick.
1570 lacp_sm_rx_set_expired(struct lacp_port *lp)
1572 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1573 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1574 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1575 lp->lp_state |= LACP_STATE_EXPIRED;
1579 lacp_sm_rx_timer(struct lacp_port *lp)
1581 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1582 /* CURRENT -> EXPIRED */
1583 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1584 lacp_sm_rx_set_expired(lp);
1586 /* EXPIRED -> DEFAULTED */
1587 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1588 lacp_sm_rx_update_default_selected(lp);
1589 lacp_sm_rx_record_default(lp);
1590 lp->lp_state &= ~LACP_STATE_EXPIRED;
1595 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1599 char buf[LACP_STATESTR_MAX+1];
1603 oldpstate = lp->lp_partner.lip_state;
1605 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1606 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1607 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1609 lp->lp_partner = du->ldu_actor;
1611 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1612 LACP_STATE_AGGREGATION) &&
1613 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1614 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1617 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1620 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1622 if (oldpstate != lp->lp_partner.lip_state) {
1623 LACP_DPRINTF((lp, "old pstate %s\n",
1624 lacp_format_state(oldpstate, buf, sizeof(buf))));
1625 LACP_DPRINTF((lp, "new pstate %s\n",
1626 lacp_format_state(lp->lp_partner.lip_state, buf,
1630 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */
1631 if (lp->lp_lsc->lsc_strict_mode)
1632 lp->lp_partner.lip_state |= LACP_STATE_SYNC;
1634 lacp_sm_ptx_update_timeout(lp, oldpstate);
1638 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1643 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1644 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1645 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1646 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1647 lacp_sm_assert_ntt(lp);
1652 lacp_sm_rx_record_default(struct lacp_port *lp)
1658 oldpstate = lp->lp_partner.lip_state;
1659 if (lp->lp_lsc->lsc_strict_mode)
1660 lp->lp_partner = lacp_partner_admin_strict;
1662 lp->lp_partner = lacp_partner_admin_optimistic;;
1663 lp->lp_state |= LACP_STATE_DEFAULTED;
1664 lacp_sm_ptx_update_timeout(lp, oldpstate);
1668 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1669 const struct lacp_peerinfo *info)
1674 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1675 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1676 LACP_STATE_AGGREGATION)) {
1677 lp->lp_selected = LACP_UNSELECTED;
1678 /* mux machine will clean up lp->lp_aggregator */
1683 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1688 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1692 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1697 if (lp->lp_lsc->lsc_strict_mode)
1698 lacp_sm_rx_update_selected_from_peerinfo(lp,
1699 &lacp_partner_admin_strict);
1701 lacp_sm_rx_update_selected_from_peerinfo(lp,
1702 &lacp_partner_admin_optimistic);
1705 /* transmit machine */
1708 lacp_sm_tx(struct lacp_port *lp)
1712 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1714 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1715 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1718 lp->lp_flags &= ~LACP_PORT_NTT;
1721 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1725 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1726 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1727 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1728 LACP_DPRINTF((lp, "rate limited pdu\n"));
1732 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
1733 error = lacp_xmit_lacpdu(lp);
1735 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
1739 lp->lp_flags &= ~LACP_PORT_NTT;
1741 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1747 lacp_sm_assert_ntt(struct lacp_port *lp)
1750 lp->lp_flags |= LACP_PORT_NTT;
1754 lacp_run_timers(struct lacp_port *lp)
1758 for (i = 0; i < LACP_NTIMER; i++) {
1759 KASSERT(lp->lp_timer[i] >= 0,
1760 ("invalid timer value %d", lp->lp_timer[i]));
1761 if (lp->lp_timer[i] == 0) {
1763 } else if (--lp->lp_timer[i] <= 0) {
1764 if (lacp_timer_funcs[i]) {
1765 (*lacp_timer_funcs[i])(lp);
1772 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1774 struct lacp_softc *lsc = lp->lp_lsc;
1775 struct lagg_port *lgp = lp->lp_lagg;
1776 struct lacp_port *lp2;
1777 struct markerdu *mdu;
1781 if (m->m_pkthdr.len != sizeof(*mdu)) {
1785 if ((m->m_flags & M_MCAST) == 0) {
1789 if (m->m_len < sizeof(*mdu)) {
1790 m = m_pullup(m, sizeof(*mdu));
1796 mdu = mtod(m, struct markerdu *);
1798 if (memcmp(&mdu->mdu_eh.ether_dhost,
1799 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
1803 if (mdu->mdu_sph.sph_version != 1) {
1807 switch (mdu->mdu_tlv.tlv_type) {
1808 case MARKER_TYPE_INFO:
1809 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1810 marker_info_tlv_template, TRUE)) {
1813 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
1814 memcpy(&mdu->mdu_eh.ether_dhost,
1815 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
1816 memcpy(&mdu->mdu_eh.ether_shost,
1817 lgp->lp_lladdr, ETHER_ADDR_LEN);
1818 error = lagg_enqueue(lp->lp_ifp, m);
1821 case MARKER_TYPE_RESPONSE:
1822 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1823 marker_response_tlv_template, TRUE)) {
1826 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
1827 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
1828 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
1830 /* Verify that it is the last marker we sent out */
1831 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
1832 sizeof(struct lacp_markerinfo)))
1836 lp->lp_flags &= ~LACP_PORT_MARK;
1838 if (lsc->lsc_suppress_distributing) {
1839 /* Check if any ports are waiting for a response */
1840 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
1841 if (lp2->lp_flags & LACP_PORT_MARK) {
1848 /* All interface queues are clear */
1849 LACP_DPRINTF((NULL, "queue flush complete\n"));
1850 lsc->lsc_suppress_distributing = FALSE;
1864 LACP_DPRINTF((lp, "bad marker frame\n"));
1870 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
1871 const struct tlv_template *tmpl, boolean_t check_type)
1873 while (/* CONSTCOND */ 1) {
1874 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
1877 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
1878 tlv->tlv_length != tmpl->tmpl_length) {
1881 if (tmpl->tmpl_type == 0) {
1884 tlv = (const struct tlvhdr *)
1885 ((const char *)tlv + tlv->tlv_length);
1894 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
1896 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
1908 lacp_format_systemid(const struct lacp_systemid *sysid,
1909 char *buf, size_t buflen)
1911 char macbuf[LACP_MACSTR_MAX+1];
1913 snprintf(buf, buflen, "%04X,%s",
1914 ntohs(sysid->lsi_prio),
1915 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
1921 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
1923 snprintf(buf, buflen, "%04X,%04X",
1924 ntohs(portid->lpi_prio),
1925 ntohs(portid->lpi_portno));
1931 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
1933 char sysid[LACP_SYSTEMIDSTR_MAX+1];
1934 char portid[LACP_PORTIDSTR_MAX+1];
1936 snprintf(buf, buflen, "(%s,%04X,%s)",
1937 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
1938 ntohs(peer->lip_key),
1939 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
1945 lacp_format_lagid(const struct lacp_peerinfo *a,
1946 const struct lacp_peerinfo *b, char *buf, size_t buflen)
1948 char astr[LACP_PARTNERSTR_MAX+1];
1949 char bstr[LACP_PARTNERSTR_MAX+1];
1953 * there's a convention to display small numbered peer
1957 if (lacp_compare_peerinfo(a, b) > 0) {
1958 const struct lacp_peerinfo *t;
1966 snprintf(buf, buflen, "[%s,%s]",
1967 lacp_format_partner(a, astr, sizeof(astr)),
1968 lacp_format_partner(b, bstr, sizeof(bstr)));
1974 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
1975 char *buf, size_t buflen)
1981 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
1985 lacp_format_state(uint8_t state, char *buf, size_t buflen)
1987 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
1992 lacp_dump_lacpdu(const struct lacpdu *du)
1994 char buf[LACP_PARTNERSTR_MAX+1];
1995 char buf2[LACP_STATESTR_MAX+1];
1997 printf("actor=%s\n",
1998 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
1999 printf("actor.state=%s\n",
2000 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
2001 printf("partner=%s\n",
2002 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
2003 printf("partner.state=%s\n",
2004 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
2006 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
2010 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
2015 printf("%s: ", lp->lp_ifp->if_xname);