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 "opt_ratelimit.h"
35 #include <sys/param.h>
36 #include <sys/callout.h>
37 #include <sys/eventhandler.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h> /* hz */
42 #include <sys/socket.h> /* for net/if.h */
43 #include <sys/sockio.h>
44 #include <sys/sysctl.h>
45 #include <machine/stdarg.h>
47 #include <sys/rwlock.h>
48 #include <sys/taskqueue.h>
51 #include <net/if_var.h>
52 #include <net/if_dl.h>
53 #include <net/ethernet.h>
54 #include <net/if_media.h>
55 #include <net/if_types.h>
57 #include <net/if_lagg.h>
58 #include <net/ieee8023ad_lacp.h>
61 * actor system priority and port priority.
62 * XXX should be configurable.
65 #define LACP_SYSTEM_PRIO 0x8000
66 #define LACP_PORT_PRIO 0x8000
68 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
69 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
71 static const struct tlv_template lacp_info_tlv_template[] = {
72 { LACP_TYPE_ACTORINFO,
73 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
74 { LACP_TYPE_PARTNERINFO,
75 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
76 { LACP_TYPE_COLLECTORINFO,
77 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
81 static const struct tlv_template marker_info_tlv_template[] = {
83 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
87 static const struct tlv_template marker_response_tlv_template[] = {
88 { MARKER_TYPE_RESPONSE,
89 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
93 typedef void (*lacp_timer_func_t)(struct lacp_port *);
95 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
96 static void lacp_fill_markerinfo(struct lacp_port *,
97 struct lacp_markerinfo *);
99 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
100 static void lacp_suppress_distributing(struct lacp_softc *,
101 struct lacp_aggregator *);
102 static void lacp_transit_expire(void *);
103 static void lacp_update_portmap(struct lacp_softc *);
104 static void lacp_select_active_aggregator(struct lacp_softc *);
105 static uint16_t lacp_compose_key(struct lacp_port *);
106 static int tlv_check(const void *, size_t, const struct tlvhdr *,
107 const struct tlv_template *, boolean_t);
108 static void lacp_tick(void *);
110 static void lacp_fill_aggregator_id(struct lacp_aggregator *,
111 const struct lacp_port *);
112 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
113 const struct lacp_peerinfo *);
114 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
115 const struct lacp_port *);
116 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
117 const struct lacp_peerinfo *);
119 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
121 static void lacp_aggregator_addref(struct lacp_softc *,
122 struct lacp_aggregator *);
123 static void lacp_aggregator_delref(struct lacp_softc *,
124 struct lacp_aggregator *);
126 /* receive machine */
128 static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
129 static int lacp_marker_input(struct lacp_port *, struct mbuf *);
130 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
131 static void lacp_sm_rx_timer(struct lacp_port *);
132 static void lacp_sm_rx_set_expired(struct lacp_port *);
133 static void lacp_sm_rx_update_ntt(struct lacp_port *,
134 const struct lacpdu *);
135 static void lacp_sm_rx_record_pdu(struct lacp_port *,
136 const struct lacpdu *);
137 static void lacp_sm_rx_update_selected(struct lacp_port *,
138 const struct lacpdu *);
139 static void lacp_sm_rx_record_default(struct lacp_port *);
140 static void lacp_sm_rx_update_default_selected(struct lacp_port *);
141 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
142 const struct lacp_peerinfo *);
146 static void lacp_sm_mux(struct lacp_port *);
147 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
148 static void lacp_sm_mux_timer(struct lacp_port *);
150 /* periodic transmit machine */
152 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
153 static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
154 static void lacp_sm_ptx_timer(struct lacp_port *);
156 /* transmit machine */
158 static void lacp_sm_tx(struct lacp_port *);
159 static void lacp_sm_assert_ntt(struct lacp_port *);
161 static void lacp_run_timers(struct lacp_port *);
162 static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
163 const struct lacp_peerinfo *);
164 static int lacp_compare_systemid(const struct lacp_systemid *,
165 const struct lacp_systemid *);
166 static void lacp_port_enable(struct lacp_port *);
167 static void lacp_port_disable(struct lacp_port *);
168 static void lacp_select(struct lacp_port *);
169 static void lacp_unselect(struct lacp_port *);
170 static void lacp_disable_collecting(struct lacp_port *);
171 static void lacp_enable_collecting(struct lacp_port *);
172 static void lacp_disable_distributing(struct lacp_port *);
173 static void lacp_enable_distributing(struct lacp_port *);
174 static int lacp_xmit_lacpdu(struct lacp_port *);
175 static int lacp_xmit_marker(struct lacp_port *);
179 static void lacp_dump_lacpdu(const struct lacpdu *);
180 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
182 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
183 const struct lacp_peerinfo *, char *, size_t);
184 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
186 static const char *lacp_format_state(uint8_t, char *, size_t);
187 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
188 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
190 static const char *lacp_format_portid(const struct lacp_portid *, char *,
192 static void lacp_dprintf(const struct lacp_port *, const char *, ...)
193 __attribute__((__format__(__printf__, 2, 3)));
195 static VNET_DEFINE(int, lacp_debug);
196 #define V_lacp_debug VNET(lacp_debug)
197 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad");
198 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
199 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
201 static VNET_DEFINE(int, lacp_default_strict_mode) = 1;
202 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode, CTLFLAG_RWTUN,
203 &VNET_NAME(lacp_default_strict_mode), 0,
204 "LACP strict protocol compliance default");
206 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
207 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
208 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
211 * partner administration variables.
212 * XXX should be configurable.
215 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
216 .lip_systemid = { .lsi_prio = 0xffff },
217 .lip_portid = { .lpi_prio = 0xffff },
218 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
219 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
222 static const struct lacp_peerinfo lacp_partner_admin_strict = {
223 .lip_systemid = { .lsi_prio = 0xffff },
224 .lip_portid = { .lpi_prio = 0xffff },
228 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
229 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
230 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
231 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
235 lacp_input(struct lagg_port *lgp, struct mbuf *m)
237 struct lacp_port *lp = LACP_PORT(lgp);
240 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
245 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
247 case SLOWPROTOCOLS_SUBTYPE_LACP:
248 lacp_pdu_input(lp, m);
251 case SLOWPROTOCOLS_SUBTYPE_MARKER:
252 lacp_marker_input(lp, m);
256 /* Not a subtype we are interested in */
261 * lacp_pdu_input: process lacpdu
264 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
266 struct lacp_softc *lsc = lp->lp_lsc;
270 if (m->m_pkthdr.len != sizeof(*du)) {
274 if ((m->m_flags & M_MCAST) == 0) {
278 if (m->m_len < sizeof(*du)) {
279 m = m_pullup(m, sizeof(*du));
285 du = mtod(m, struct lacpdu *);
287 if (memcmp(&du->ldu_eh.ether_dhost,
288 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
293 * ignore the version for compatibility with
294 * the future protocol revisions.
297 if (du->ldu_sph.sph_version != 1) {
303 * ignore tlv types for compatibility with
304 * the future protocol revisions.
306 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
307 lacp_info_tlv_template, FALSE)) {
311 if (V_lacp_debug > 0) {
312 lacp_dprintf(lp, "lacpdu receive\n");
313 lacp_dump_lacpdu(du);
316 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
317 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
334 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
336 struct lagg_port *lgp = lp->lp_lagg;
337 struct lagg_softc *sc = lgp->lp_softc;
339 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
340 memcpy(&info->lip_systemid.lsi_mac,
341 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
342 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
343 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
344 info->lip_state = lp->lp_state;
348 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
350 struct ifnet *ifp = lp->lp_ifp;
352 /* Fill in the port index and system id (encoded as the MAC) */
353 info->mi_rq_port = htons(ifp->if_index);
354 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
355 info->mi_rq_xid = htonl(0);
359 lacp_xmit_lacpdu(struct lacp_port *lp)
361 struct lagg_port *lgp = lp->lp_lagg;
366 LACP_LOCK_ASSERT(lp->lp_lsc);
368 m = m_gethdr(M_NOWAIT, MT_DATA);
372 m->m_len = m->m_pkthdr.len = sizeof(*du);
374 du = mtod(m, struct lacpdu *);
375 memset(du, 0, sizeof(*du));
377 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
379 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
380 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
382 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
383 du->ldu_sph.sph_version = 1;
385 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
386 du->ldu_actor = lp->lp_actor;
388 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
389 sizeof(du->ldu_partner));
390 du->ldu_partner = lp->lp_partner;
392 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
393 sizeof(du->ldu_collector));
394 du->ldu_collector.lci_maxdelay = 0;
396 if (V_lacp_debug > 0) {
397 lacp_dprintf(lp, "lacpdu transmit\n");
398 lacp_dump_lacpdu(du);
401 m->m_flags |= M_MCAST;
404 * XXX should use higher priority queue.
405 * otherwise network congestion can break aggregation.
408 error = lagg_enqueue(lp->lp_ifp, m);
413 lacp_xmit_marker(struct lacp_port *lp)
415 struct lagg_port *lgp = lp->lp_lagg;
417 struct markerdu *mdu;
420 LACP_LOCK_ASSERT(lp->lp_lsc);
422 m = m_gethdr(M_NOWAIT, MT_DATA);
426 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
428 mdu = mtod(m, struct markerdu *);
429 memset(mdu, 0, sizeof(*mdu));
431 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
433 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
434 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
436 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
437 mdu->mdu_sph.sph_version = 1;
439 /* Bump the transaction id and copy over the marker info */
440 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
441 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
442 mdu->mdu_info = lp->lp_marker;
444 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
445 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
446 ntohl(mdu->mdu_info.mi_rq_xid)));
448 m->m_flags |= M_MCAST;
449 error = lagg_enqueue(lp->lp_ifp, m);
454 lacp_linkstate(struct lagg_port *lgp)
456 struct lacp_port *lp = LACP_PORT(lgp);
457 struct lacp_softc *lsc = lp->lp_lsc;
458 struct ifnet *ifp = lgp->lp_ifp;
459 struct ifmediareq ifmr;
465 bzero((char *)&ifmr, sizeof(ifmr));
466 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
471 media = ifmr.ifm_active;
472 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
473 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
474 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
475 old_state = lp->lp_state;
476 old_key = lp->lp_key;
478 lp->lp_media = media;
480 * If the port is not an active full duplex Ethernet link then it can
483 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
484 ifp->if_link_state != LINK_STATE_UP) {
485 lacp_port_disable(lp);
487 lacp_port_enable(lp);
489 lp->lp_key = lacp_compose_key(lp);
491 if (old_state != lp->lp_state || old_key != lp->lp_key) {
492 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
493 lp->lp_selected = LACP_UNSELECTED;
501 struct lacp_softc *lsc = arg;
502 struct lacp_port *lp;
504 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
505 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
508 CURVNET_SET(lp->lp_ifp->if_vnet);
514 lacp_sm_ptx_tx_schedule(lp);
517 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
521 lacp_port_create(struct lagg_port *lgp)
523 struct lagg_softc *sc = lgp->lp_softc;
524 struct lacp_softc *lsc = LACP_SOFTC(sc);
525 struct lacp_port *lp;
526 struct ifnet *ifp = lgp->lp_ifp;
527 struct sockaddr_dl sdl;
528 struct ifmultiaddr *rifma = NULL;
531 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
532 sdl.sdl_alen = ETHER_ADDR_LEN;
534 bcopy(ðermulticastaddr_slowprotocols,
535 LLADDR(&sdl), ETHER_ADDR_LEN);
536 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
538 printf("%s: ADDMULTI failed on %s\n", __func__,
539 lgp->lp_ifp->if_xname);
543 lp = malloc(sizeof(struct lacp_port),
544 M_DEVBUF, M_NOWAIT|M_ZERO);
555 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
557 lacp_fill_actorinfo(lp, &lp->lp_actor);
558 lacp_fill_markerinfo(lp, &lp->lp_marker);
559 lp->lp_state = LACP_STATE_ACTIVITY;
560 lp->lp_aggregator = NULL;
561 lacp_sm_rx_set_expired(lp);
569 lacp_port_destroy(struct lagg_port *lgp)
571 struct lacp_port *lp = LACP_PORT(lgp);
572 struct lacp_softc *lsc = lp->lp_lsc;
576 for (i = 0; i < LACP_NTIMER; i++) {
577 LACP_TIMER_DISARM(lp, i);
580 lacp_disable_collecting(lp);
581 lacp_disable_distributing(lp);
584 LIST_REMOVE(lp, lp_next);
587 /* The address may have already been removed by if_purgemaddrs() */
588 if (!lgp->lp_detaching)
589 if_delmulti_ifma(lp->lp_ifma);
595 lacp_req(struct lagg_softc *sc, void *data)
597 struct lacp_opreq *req = (struct lacp_opreq *)data;
598 struct lacp_softc *lsc = LACP_SOFTC(sc);
599 struct lacp_aggregator *la;
601 bzero(req, sizeof(struct lacp_opreq));
604 * If the LACP softc is NULL, return with the opreq structure full of
605 * zeros. It is normal for the softc to be NULL while the lagg is
611 la = lsc->lsc_active_aggregator;
614 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
615 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
617 req->actor_key = ntohs(la->la_actor.lip_key);
618 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
619 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
620 req->actor_state = la->la_actor.lip_state;
622 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
623 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
625 req->partner_key = ntohs(la->la_partner.lip_key);
626 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
627 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
628 req->partner_state = la->la_partner.lip_state;
634 lacp_portreq(struct lagg_port *lgp, void *data)
636 struct lacp_opreq *req = (struct lacp_opreq *)data;
637 struct lacp_port *lp = LACP_PORT(lgp);
638 struct lacp_softc *lsc = lp->lp_lsc;
641 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
642 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
644 req->actor_key = ntohs(lp->lp_actor.lip_key);
645 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
646 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
647 req->actor_state = lp->lp_actor.lip_state;
649 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
650 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
652 req->partner_key = ntohs(lp->lp_partner.lip_key);
653 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
654 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
655 req->partner_state = lp->lp_partner.lip_state;
660 lacp_disable_collecting(struct lacp_port *lp)
662 LACP_DPRINTF((lp, "collecting disabled\n"));
663 lp->lp_state &= ~LACP_STATE_COLLECTING;
667 lacp_enable_collecting(struct lacp_port *lp)
669 LACP_DPRINTF((lp, "collecting enabled\n"));
670 lp->lp_state |= LACP_STATE_COLLECTING;
674 lacp_disable_distributing(struct lacp_port *lp)
676 struct lacp_aggregator *la = lp->lp_aggregator;
677 struct lacp_softc *lsc = lp->lp_lsc;
678 struct lagg_softc *sc = lsc->lsc_softc;
679 char buf[LACP_LAGIDSTR_MAX+1];
681 LACP_LOCK_ASSERT(lsc);
683 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
687 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
688 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
689 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
691 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
693 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
694 la->la_nports, la->la_nports - 1));
696 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
698 sc->sc_active = la->la_nports;
700 if (lsc->lsc_active_aggregator == la) {
701 lacp_suppress_distributing(lsc, la);
702 lacp_select_active_aggregator(lsc);
703 /* regenerate the port map, the active aggregator has changed */
704 lacp_update_portmap(lsc);
707 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
711 lacp_enable_distributing(struct lacp_port *lp)
713 struct lacp_aggregator *la = lp->lp_aggregator;
714 struct lacp_softc *lsc = lp->lp_lsc;
715 struct lagg_softc *sc = lsc->lsc_softc;
716 char buf[LACP_LAGIDSTR_MAX+1];
718 LACP_LOCK_ASSERT(lsc);
720 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
724 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
726 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
727 la->la_nports, la->la_nports + 1));
729 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
730 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
732 sc->sc_active = la->la_nports;
734 lp->lp_state |= LACP_STATE_DISTRIBUTING;
736 if (lsc->lsc_active_aggregator == la) {
737 lacp_suppress_distributing(lsc, la);
738 lacp_update_portmap(lsc);
740 /* try to become the active aggregator */
741 lacp_select_active_aggregator(lsc);
745 lacp_transit_expire(void *vp)
747 struct lacp_softc *lsc = vp;
749 LACP_LOCK_ASSERT(lsc);
751 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
755 lsc->lsc_suppress_distributing = FALSE;
759 lacp_attach(struct lagg_softc *sc)
761 struct lacp_softc *lsc;
763 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
768 lsc->lsc_hashkey = m_ether_tcpip_hash_init();
769 lsc->lsc_active_aggregator = NULL;
770 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
772 TAILQ_INIT(&lsc->lsc_aggregators);
773 LIST_INIT(&lsc->lsc_ports);
775 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
776 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
778 /* if the lagg is already up then do the same */
779 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
784 lacp_detach(void *psc)
786 struct lacp_softc *lsc = (struct lacp_softc *)psc;
788 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
789 ("aggregators still active"));
790 KASSERT(lsc->lsc_active_aggregator == NULL,
791 ("aggregator still attached"));
793 callout_drain(&lsc->lsc_transit_callout);
794 callout_drain(&lsc->lsc_callout);
796 LACP_LOCK_DESTROY(lsc);
801 lacp_init(struct lagg_softc *sc)
803 struct lacp_softc *lsc = LACP_SOFTC(sc);
806 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
811 lacp_stop(struct lagg_softc *sc)
813 struct lacp_softc *lsc = LACP_SOFTC(sc);
816 callout_stop(&lsc->lsc_transit_callout);
817 callout_stop(&lsc->lsc_callout);
822 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
824 struct lacp_softc *lsc = LACP_SOFTC(sc);
825 struct lacp_portmap *pm;
826 struct lacp_port *lp;
829 if (__predict_false(lsc->lsc_suppress_distributing)) {
830 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
834 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
835 if (pm->pm_count == 0) {
836 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
840 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
841 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
842 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
844 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey);
845 hash %= pm->pm_count;
846 lp = pm->pm_map[hash];
848 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
849 ("aggregated port is not distributing"));
851 return (lp->lp_lagg);
856 lacp_select_tx_port_by_hash(struct lagg_softc *sc, uint32_t flowid)
858 struct lacp_softc *lsc = LACP_SOFTC(sc);
859 struct lacp_portmap *pm;
860 struct lacp_port *lp;
863 if (__predict_false(lsc->lsc_suppress_distributing)) {
864 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
868 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
869 if (pm->pm_count == 0) {
870 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
874 hash = flowid >> sc->flowid_shift;
875 hash %= pm->pm_count;
876 lp = pm->pm_map[hash];
878 return (lp->lp_lagg);
883 * lacp_suppress_distributing: drop transmit packets for a while
884 * to preserve packet ordering.
888 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
890 struct lacp_port *lp;
892 if (lsc->lsc_active_aggregator != la) {
898 lsc->lsc_suppress_distributing = TRUE;
900 /* send a marker frame down each port to verify the queues are empty */
901 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
902 lp->lp_flags |= LACP_PORT_MARK;
903 lacp_xmit_marker(lp);
906 /* set a timeout for the marker frames */
907 callout_reset(&lsc->lsc_transit_callout,
908 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
912 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
913 const struct lacp_peerinfo *b)
915 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
919 lacp_compare_systemid(const struct lacp_systemid *a,
920 const struct lacp_systemid *b)
922 return (memcmp(a, b, sizeof(*a)));
927 lacp_compare_portid(const struct lacp_portid *a,
928 const struct lacp_portid *b)
930 return (memcmp(a, b, sizeof(*a)));
935 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
937 struct lacp_port *lp;
940 lp = TAILQ_FIRST(&la->la_ports);
945 speed = ifmedia_baudrate(lp->lp_media);
946 speed *= la->la_nports;
948 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
949 lp->lp_media, la->la_nports));
956 * lacp_select_active_aggregator: select an aggregator to be used to transmit
957 * packets from lagg(4) interface.
961 lacp_select_active_aggregator(struct lacp_softc *lsc)
963 struct lacp_aggregator *la;
964 struct lacp_aggregator *best_la = NULL;
965 uint64_t best_speed = 0;
966 char buf[LACP_LAGIDSTR_MAX+1];
970 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
973 if (la->la_nports == 0) {
977 speed = lacp_aggregator_bandwidth(la);
978 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
979 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
980 speed, la->la_nports));
983 * This aggregator is chosen if the partner has a better
984 * system priority or, the total aggregated speed is higher
985 * or, it is already the chosen aggregator
987 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
988 LACP_SYS_PRI(best_la->la_partner)) ||
989 speed > best_speed ||
990 (speed == best_speed &&
991 la == lsc->lsc_active_aggregator)) {
997 KASSERT(best_la == NULL || best_la->la_nports > 0,
998 ("invalid aggregator refcnt"));
999 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
1000 ("invalid aggregator list"));
1002 if (lsc->lsc_active_aggregator != best_la) {
1003 LACP_DPRINTF((NULL, "active aggregator changed\n"));
1004 LACP_DPRINTF((NULL, "old %s\n",
1005 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
1006 buf, sizeof(buf))));
1008 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
1010 LACP_DPRINTF((NULL, "new %s\n",
1011 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
1013 if (lsc->lsc_active_aggregator != best_la) {
1014 lsc->lsc_active_aggregator = best_la;
1015 lacp_update_portmap(lsc);
1017 lacp_suppress_distributing(lsc, best_la);
1023 * Updated the inactive portmap array with the new list of ports and
1027 lacp_update_portmap(struct lacp_softc *lsc)
1029 struct lagg_softc *sc = lsc->lsc_softc;
1030 struct lacp_aggregator *la;
1031 struct lacp_portmap *p;
1032 struct lacp_port *lp;
1037 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1038 p = &lsc->lsc_pmap[newmap];
1039 la = lsc->lsc_active_aggregator;
1041 bzero(p, sizeof(struct lacp_portmap));
1043 if (la != NULL && la->la_nports > 0) {
1044 p->pm_count = la->la_nports;
1046 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
1047 p->pm_map[i++] = lp;
1048 KASSERT(i == p->pm_count, ("Invalid port count"));
1049 speed = lacp_aggregator_bandwidth(la);
1051 sc->sc_ifp->if_baudrate = speed;
1053 /* switch the active portmap over */
1054 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1055 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1057 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1061 lacp_compose_key(struct lacp_port *lp)
1063 struct lagg_port *lgp = lp->lp_lagg;
1064 struct lagg_softc *sc = lgp->lp_softc;
1065 u_int media = lp->lp_media;
1068 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1071 * non-aggregatable links should have unique keys.
1073 * XXX this isn't really unique as if_index is 16 bit.
1076 /* bit 0..14: (some bits of) if_index of this port */
1077 key = lp->lp_ifp->if_index;
1081 u_int subtype = IFM_SUBTYPE(media);
1083 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1084 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1086 /* bit 0..4: IFM_SUBTYPE modulo speed */
1108 case IFM_1000_SGMII:
1109 case IFM_1000_CX_SGMII:
1115 case IFM_10G_TWINAX:
1116 case IFM_10G_TWINAX_LONG:
1171 /* bit 5..14: (some bits of) if_index of lagg device */
1172 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1175 return (htons(key));
1179 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1181 char buf[LACP_LAGIDSTR_MAX+1];
1183 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1185 lacp_format_lagid(&la->la_actor, &la->la_partner,
1187 la->la_refcnt, la->la_refcnt + 1));
1189 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1191 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1195 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1197 char buf[LACP_LAGIDSTR_MAX+1];
1199 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1201 lacp_format_lagid(&la->la_actor, &la->la_partner,
1203 la->la_refcnt, la->la_refcnt - 1));
1205 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1207 if (la->la_refcnt > 0) {
1211 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1212 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1214 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1220 * lacp_aggregator_get: allocate an aggregator.
1223 static struct lacp_aggregator *
1224 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1226 struct lacp_aggregator *la;
1228 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1232 TAILQ_INIT(&la->la_ports);
1234 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1241 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1245 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1247 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1248 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1250 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1254 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1255 const struct lacp_peerinfo *lpi_port)
1257 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1258 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1259 lpi_aggr->lip_key = lpi_port->lip_key;
1263 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1267 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1268 const struct lacp_port *lp)
1270 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1271 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1275 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1279 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1283 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1291 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1292 const struct lacp_peerinfo *b)
1294 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1295 sizeof(a->lip_systemid))) {
1299 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1307 lacp_port_enable(struct lacp_port *lp)
1309 lp->lp_state |= LACP_STATE_AGGREGATION;
1313 lacp_port_disable(struct lacp_port *lp)
1315 lacp_set_mux(lp, LACP_MUX_DETACHED);
1317 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1318 lp->lp_selected = LACP_UNSELECTED;
1319 lacp_sm_rx_record_default(lp);
1320 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1321 lp->lp_state &= ~LACP_STATE_EXPIRED;
1325 * lacp_select: select an aggregator. create one if necessary.
1328 lacp_select(struct lacp_port *lp)
1330 struct lacp_softc *lsc = lp->lp_lsc;
1331 struct lacp_aggregator *la;
1332 char buf[LACP_LAGIDSTR_MAX+1];
1334 if (lp->lp_aggregator) {
1338 /* If we haven't heard from our peer, skip this step. */
1339 if (lp->lp_state & LACP_STATE_DEFAULTED)
1342 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1343 ("timer_wait_while still active"));
1345 LACP_DPRINTF((lp, "port lagid=%s\n",
1346 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1347 buf, sizeof(buf))));
1349 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1350 if (lacp_aggregator_is_compatible(la, lp)) {
1356 la = lacp_aggregator_get(lsc, lp);
1358 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1361 * will retry on the next tick.
1366 lacp_fill_aggregator_id(la, lp);
1367 LACP_DPRINTF((lp, "aggregator created\n"));
1369 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1370 if (la->la_refcnt == LACP_MAX_PORTS)
1372 lacp_aggregator_addref(lsc, la);
1375 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1376 lacp_format_lagid(&la->la_actor, &la->la_partner,
1377 buf, sizeof(buf))));
1379 lp->lp_aggregator = la;
1380 lp->lp_selected = LACP_SELECTED;
1384 * lacp_unselect: finish unselect/detach process.
1388 lacp_unselect(struct lacp_port *lp)
1390 struct lacp_softc *lsc = lp->lp_lsc;
1391 struct lacp_aggregator *la = lp->lp_aggregator;
1393 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1394 ("timer_wait_while still active"));
1400 lp->lp_aggregator = NULL;
1401 lacp_aggregator_delref(lsc, la);
1407 lacp_sm_mux(struct lacp_port *lp)
1409 struct lagg_port *lgp = lp->lp_lagg;
1410 struct lagg_softc *sc = lgp->lp_softc;
1411 enum lacp_mux_state new_state;
1413 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1414 boolean_t p_collecting =
1415 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1416 enum lacp_selected selected = lp->lp_selected;
1417 struct lacp_aggregator *la;
1419 if (V_lacp_debug > 1)
1420 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
1421 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
1422 lp->lp_mux_state, selected, p_sync, p_collecting);
1425 la = lp->lp_aggregator;
1426 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1427 ("MUX not detached"));
1428 new_state = lp->lp_mux_state;
1429 switch (lp->lp_mux_state) {
1430 case LACP_MUX_DETACHED:
1431 if (selected != LACP_UNSELECTED) {
1432 new_state = LACP_MUX_WAITING;
1435 case LACP_MUX_WAITING:
1436 KASSERT(la->la_pending > 0 ||
1437 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1438 ("timer_wait_while still active"));
1439 if (selected == LACP_SELECTED && la->la_pending == 0) {
1440 new_state = LACP_MUX_ATTACHED;
1441 } else if (selected == LACP_UNSELECTED) {
1442 new_state = LACP_MUX_DETACHED;
1445 case LACP_MUX_ATTACHED:
1446 if (selected == LACP_SELECTED && p_sync) {
1447 new_state = LACP_MUX_COLLECTING;
1448 } else if (selected != LACP_SELECTED) {
1449 new_state = LACP_MUX_DETACHED;
1452 case LACP_MUX_COLLECTING:
1453 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1454 new_state = LACP_MUX_DISTRIBUTING;
1455 } else if (selected != LACP_SELECTED || !p_sync) {
1456 new_state = LACP_MUX_ATTACHED;
1459 case LACP_MUX_DISTRIBUTING:
1460 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1461 new_state = LACP_MUX_COLLECTING;
1462 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
1467 panic("%s: unknown state", __func__);
1470 if (lp->lp_mux_state == new_state) {
1474 lacp_set_mux(lp, new_state);
1479 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1481 struct lacp_aggregator *la = lp->lp_aggregator;
1483 if (lp->lp_mux_state == new_state) {
1487 switch (new_state) {
1488 case LACP_MUX_DETACHED:
1489 lp->lp_state &= ~LACP_STATE_SYNC;
1490 lacp_disable_distributing(lp);
1491 lacp_disable_collecting(lp);
1492 lacp_sm_assert_ntt(lp);
1494 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1495 KASSERT(la->la_pending > 0,
1496 ("timer_wait_while not active"));
1499 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1502 case LACP_MUX_WAITING:
1503 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1504 LACP_AGGREGATE_WAIT_TIME);
1507 case LACP_MUX_ATTACHED:
1508 lp->lp_state |= LACP_STATE_SYNC;
1509 lacp_disable_collecting(lp);
1510 lacp_sm_assert_ntt(lp);
1512 case LACP_MUX_COLLECTING:
1513 lacp_enable_collecting(lp);
1514 lacp_disable_distributing(lp);
1515 lacp_sm_assert_ntt(lp);
1517 case LACP_MUX_DISTRIBUTING:
1518 lacp_enable_distributing(lp);
1521 panic("%s: unknown state", __func__);
1524 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1526 lp->lp_mux_state = new_state;
1530 lacp_sm_mux_timer(struct lacp_port *lp)
1532 struct lacp_aggregator *la = lp->lp_aggregator;
1533 char buf[LACP_LAGIDSTR_MAX+1];
1535 KASSERT(la->la_pending > 0, ("no pending event"));
1537 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1538 lacp_format_lagid(&la->la_actor, &la->la_partner,
1540 la->la_pending, la->la_pending - 1));
1545 /* periodic transmit machine */
1548 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1550 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1551 LACP_STATE_TIMEOUT)) {
1555 LACP_DPRINTF((lp, "partner timeout changed\n"));
1558 * FAST_PERIODIC -> SLOW_PERIODIC
1560 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1562 * let lacp_sm_ptx_tx_schedule to update timeout.
1565 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1568 * if timeout has been shortened, assert NTT.
1571 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1572 lacp_sm_assert_ntt(lp);
1577 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1581 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1582 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1588 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1592 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1596 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1597 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1599 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1603 lacp_sm_ptx_timer(struct lacp_port *lp)
1605 lacp_sm_assert_ntt(lp);
1609 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1614 * check LACP_DISABLED first
1617 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1622 * check loopback condition.
1625 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1626 &lp->lp_actor.lip_systemid)) {
1631 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1634 lacp_sm_rx_update_selected(lp, du);
1635 lacp_sm_rx_update_ntt(lp, du);
1636 lacp_sm_rx_record_pdu(lp, du);
1638 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1639 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1640 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1642 lp->lp_state &= ~LACP_STATE_EXPIRED;
1645 * kick transmit machine without waiting the next tick.
1652 lacp_sm_rx_set_expired(struct lacp_port *lp)
1654 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1655 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1656 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1657 lp->lp_state |= LACP_STATE_EXPIRED;
1661 lacp_sm_rx_timer(struct lacp_port *lp)
1663 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1664 /* CURRENT -> EXPIRED */
1665 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1666 lacp_sm_rx_set_expired(lp);
1668 /* EXPIRED -> DEFAULTED */
1669 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1670 lacp_sm_rx_update_default_selected(lp);
1671 lacp_sm_rx_record_default(lp);
1672 lp->lp_state &= ~LACP_STATE_EXPIRED;
1677 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1681 char buf[LACP_STATESTR_MAX+1];
1685 oldpstate = lp->lp_partner.lip_state;
1687 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1688 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1689 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1691 lp->lp_partner = du->ldu_actor;
1693 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1694 LACP_STATE_AGGREGATION) &&
1695 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1696 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1698 * XXX Maintain legacy behavior of leaving the
1699 * LACP_STATE_SYNC bit unchanged from the partner's
1700 * advertisement if lsc_strict_mode is false.
1701 * TODO: We should re-examine the concept of the "strict mode"
1702 * to ensure it makes sense to maintain a non-strict mode.
1704 if (lp->lp_lsc->lsc_strict_mode)
1705 lp->lp_partner.lip_state |= LACP_STATE_SYNC;
1707 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1710 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1712 if (oldpstate != lp->lp_partner.lip_state) {
1713 LACP_DPRINTF((lp, "old pstate %s\n",
1714 lacp_format_state(oldpstate, buf, sizeof(buf))));
1715 LACP_DPRINTF((lp, "new pstate %s\n",
1716 lacp_format_state(lp->lp_partner.lip_state, buf,
1720 lacp_sm_ptx_update_timeout(lp, oldpstate);
1724 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1729 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1730 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1731 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1732 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1733 lacp_sm_assert_ntt(lp);
1738 lacp_sm_rx_record_default(struct lacp_port *lp)
1744 oldpstate = lp->lp_partner.lip_state;
1745 if (lp->lp_lsc->lsc_strict_mode)
1746 lp->lp_partner = lacp_partner_admin_strict;
1748 lp->lp_partner = lacp_partner_admin_optimistic;
1749 lp->lp_state |= LACP_STATE_DEFAULTED;
1750 lacp_sm_ptx_update_timeout(lp, oldpstate);
1754 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1755 const struct lacp_peerinfo *info)
1760 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1761 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1762 LACP_STATE_AGGREGATION)) {
1763 lp->lp_selected = LACP_UNSELECTED;
1764 /* mux machine will clean up lp->lp_aggregator */
1769 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1774 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1778 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1783 if (lp->lp_lsc->lsc_strict_mode)
1784 lacp_sm_rx_update_selected_from_peerinfo(lp,
1785 &lacp_partner_admin_strict);
1787 lacp_sm_rx_update_selected_from_peerinfo(lp,
1788 &lacp_partner_admin_optimistic);
1791 /* transmit machine */
1794 lacp_sm_tx(struct lacp_port *lp)
1798 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1800 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1801 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1804 lp->lp_flags &= ~LACP_PORT_NTT;
1807 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1811 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1812 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1813 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1814 LACP_DPRINTF((lp, "rate limited pdu\n"));
1818 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
1819 error = lacp_xmit_lacpdu(lp);
1821 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
1825 lp->lp_flags &= ~LACP_PORT_NTT;
1827 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1833 lacp_sm_assert_ntt(struct lacp_port *lp)
1836 lp->lp_flags |= LACP_PORT_NTT;
1840 lacp_run_timers(struct lacp_port *lp)
1844 for (i = 0; i < LACP_NTIMER; i++) {
1845 KASSERT(lp->lp_timer[i] >= 0,
1846 ("invalid timer value %d", lp->lp_timer[i]));
1847 if (lp->lp_timer[i] == 0) {
1849 } else if (--lp->lp_timer[i] <= 0) {
1850 if (lacp_timer_funcs[i]) {
1851 (*lacp_timer_funcs[i])(lp);
1858 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1860 struct lacp_softc *lsc = lp->lp_lsc;
1861 struct lagg_port *lgp = lp->lp_lagg;
1862 struct lacp_port *lp2;
1863 struct markerdu *mdu;
1867 if (m->m_pkthdr.len != sizeof(*mdu)) {
1871 if ((m->m_flags & M_MCAST) == 0) {
1875 if (m->m_len < sizeof(*mdu)) {
1876 m = m_pullup(m, sizeof(*mdu));
1882 mdu = mtod(m, struct markerdu *);
1884 if (memcmp(&mdu->mdu_eh.ether_dhost,
1885 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
1889 if (mdu->mdu_sph.sph_version != 1) {
1893 switch (mdu->mdu_tlv.tlv_type) {
1894 case MARKER_TYPE_INFO:
1895 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1896 marker_info_tlv_template, TRUE)) {
1899 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
1900 memcpy(&mdu->mdu_eh.ether_dhost,
1901 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
1902 memcpy(&mdu->mdu_eh.ether_shost,
1903 lgp->lp_lladdr, ETHER_ADDR_LEN);
1904 error = lagg_enqueue(lp->lp_ifp, m);
1907 case MARKER_TYPE_RESPONSE:
1908 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1909 marker_response_tlv_template, TRUE)) {
1912 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
1913 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
1914 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
1916 /* Verify that it is the last marker we sent out */
1917 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
1918 sizeof(struct lacp_markerinfo)))
1922 lp->lp_flags &= ~LACP_PORT_MARK;
1924 if (lsc->lsc_suppress_distributing) {
1925 /* Check if any ports are waiting for a response */
1926 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
1927 if (lp2->lp_flags & LACP_PORT_MARK) {
1934 /* All interface queues are clear */
1935 LACP_DPRINTF((NULL, "queue flush complete\n"));
1936 lsc->lsc_suppress_distributing = FALSE;
1950 LACP_DPRINTF((lp, "bad marker frame\n"));
1956 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
1957 const struct tlv_template *tmpl, boolean_t check_type)
1959 while (/* CONSTCOND */ 1) {
1960 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
1963 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
1964 tlv->tlv_length != tmpl->tmpl_length) {
1967 if (tmpl->tmpl_type == 0) {
1970 tlv = (const struct tlvhdr *)
1971 ((const char *)tlv + tlv->tlv_length);
1980 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
1982 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
1994 lacp_format_systemid(const struct lacp_systemid *sysid,
1995 char *buf, size_t buflen)
1997 char macbuf[LACP_MACSTR_MAX+1];
1999 snprintf(buf, buflen, "%04X,%s",
2000 ntohs(sysid->lsi_prio),
2001 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
2007 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
2009 snprintf(buf, buflen, "%04X,%04X",
2010 ntohs(portid->lpi_prio),
2011 ntohs(portid->lpi_portno));
2017 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
2019 char sysid[LACP_SYSTEMIDSTR_MAX+1];
2020 char portid[LACP_PORTIDSTR_MAX+1];
2022 snprintf(buf, buflen, "(%s,%04X,%s)",
2023 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
2024 ntohs(peer->lip_key),
2025 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
2031 lacp_format_lagid(const struct lacp_peerinfo *a,
2032 const struct lacp_peerinfo *b, char *buf, size_t buflen)
2034 char astr[LACP_PARTNERSTR_MAX+1];
2035 char bstr[LACP_PARTNERSTR_MAX+1];
2039 * there's a convention to display small numbered peer
2043 if (lacp_compare_peerinfo(a, b) > 0) {
2044 const struct lacp_peerinfo *t;
2052 snprintf(buf, buflen, "[%s,%s]",
2053 lacp_format_partner(a, astr, sizeof(astr)),
2054 lacp_format_partner(b, bstr, sizeof(bstr)));
2060 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
2061 char *buf, size_t buflen)
2067 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
2071 lacp_format_state(uint8_t state, char *buf, size_t buflen)
2073 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
2078 lacp_dump_lacpdu(const struct lacpdu *du)
2080 char buf[LACP_PARTNERSTR_MAX+1];
2081 char buf2[LACP_STATESTR_MAX+1];
2083 printf("actor=%s\n",
2084 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
2085 printf("actor.state=%s\n",
2086 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
2087 printf("partner=%s\n",
2088 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
2089 printf("partner.state=%s\n",
2090 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
2092 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
2096 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
2101 printf("%s: ", lp->lp_ifp->if_xname);