1 /* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */
2
3 /*-
4 * Copyright (c)2005 YAMAMOTO Takashi,
5 * Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
16 *
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
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/8.3/sys/net/ieee8023ad_lacp.c 232314 2012-02-29 20:22:45Z thompsa $");
32
33 #include <sys/param.h>
34 #include <sys/callout.h>
35 #include <sys/mbuf.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h> /* hz */
39 #include <sys/socket.h> /* for net/if.h */
40 #include <sys/sockio.h>
41 #include <machine/stdarg.h>
42 #include <sys/lock.h>
43 #include <sys/rwlock.h>
44
45 #include <net/if.h>
46 #include <net/if_dl.h>
47 #include <net/ethernet.h>
48 #include <net/if_media.h>
49 #include <net/if_types.h>
50
51 #include <net/if_lagg.h>
52 #include <net/ieee8023ad_lacp.h>
53
54 /*
55 * actor system priority and port priority.
56 * XXX should be configurable.
57 */
58
59 #define LACP_SYSTEM_PRIO 0x8000
60 #define LACP_PORT_PRIO 0x8000
61
62 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
63 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
64
65 static const struct tlv_template lacp_info_tlv_template[] = {
66 { LACP_TYPE_ACTORINFO,
67 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
68 { LACP_TYPE_PARTNERINFO,
69 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
70 { LACP_TYPE_COLLECTORINFO,
71 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
72 { 0, 0 },
73 };
74
75 static const struct tlv_template marker_info_tlv_template[] = {
76 { MARKER_TYPE_INFO,
77 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
78 { 0, 0 },
79 };
80
81 static const struct tlv_template marker_response_tlv_template[] = {
82 { MARKER_TYPE_RESPONSE,
83 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
84 { 0, 0 },
85 };
86
87 typedef void (*lacp_timer_func_t)(struct lacp_port *);
88
89 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
90 static void lacp_fill_markerinfo(struct lacp_port *,
91 struct lacp_markerinfo *);
92
93 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
94 static void lacp_suppress_distributing(struct lacp_softc *,
95 struct lacp_aggregator *);
96 static void lacp_transit_expire(void *);
97 static void lacp_update_portmap(struct lacp_softc *);
98 static void lacp_select_active_aggregator(struct lacp_softc *);
99 static uint16_t lacp_compose_key(struct lacp_port *);
100 static int tlv_check(const void *, size_t, const struct tlvhdr *,
101 const struct tlv_template *, boolean_t);
102 static void lacp_tick(void *);
103
104 static void lacp_fill_aggregator_id(struct lacp_aggregator *,
105 const struct lacp_port *);
106 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
107 const struct lacp_peerinfo *);
108 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
109 const struct lacp_port *);
110 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
111 const struct lacp_peerinfo *);
112
113 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
114 struct lacp_port *);
115 static void lacp_aggregator_addref(struct lacp_softc *,
116 struct lacp_aggregator *);
117 static void lacp_aggregator_delref(struct lacp_softc *,
118 struct lacp_aggregator *);
119
120 /* receive machine */
121
122 static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
123 static int lacp_marker_input(struct lacp_port *, struct mbuf *);
124 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
125 static void lacp_sm_rx_timer(struct lacp_port *);
126 static void lacp_sm_rx_set_expired(struct lacp_port *);
127 static void lacp_sm_rx_update_ntt(struct lacp_port *,
128 const struct lacpdu *);
129 static void lacp_sm_rx_record_pdu(struct lacp_port *,
130 const struct lacpdu *);
131 static void lacp_sm_rx_update_selected(struct lacp_port *,
132 const struct lacpdu *);
133 static void lacp_sm_rx_record_default(struct lacp_port *);
134 static void lacp_sm_rx_update_default_selected(struct lacp_port *);
135 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
136 const struct lacp_peerinfo *);
137
138 /* mux machine */
139
140 static void lacp_sm_mux(struct lacp_port *);
141 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
142 static void lacp_sm_mux_timer(struct lacp_port *);
143
144 /* periodic transmit machine */
145
146 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
147 static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
148 static void lacp_sm_ptx_timer(struct lacp_port *);
149
150 /* transmit machine */
151
152 static void lacp_sm_tx(struct lacp_port *);
153 static void lacp_sm_assert_ntt(struct lacp_port *);
154
155 static void lacp_run_timers(struct lacp_port *);
156 static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
157 const struct lacp_peerinfo *);
158 static int lacp_compare_systemid(const struct lacp_systemid *,
159 const struct lacp_systemid *);
160 static void lacp_port_enable(struct lacp_port *);
161 static void lacp_port_disable(struct lacp_port *);
162 static void lacp_select(struct lacp_port *);
163 static void lacp_unselect(struct lacp_port *);
164 static void lacp_disable_collecting(struct lacp_port *);
165 static void lacp_enable_collecting(struct lacp_port *);
166 static void lacp_disable_distributing(struct lacp_port *);
167 static void lacp_enable_distributing(struct lacp_port *);
168 static int lacp_xmit_lacpdu(struct lacp_port *);
169 static int lacp_xmit_marker(struct lacp_port *);
170
171 #if defined(LACP_DEBUG)
172 static void lacp_dump_lacpdu(const struct lacpdu *);
173 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
174 size_t);
175 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
176 const struct lacp_peerinfo *, char *, size_t);
177 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
178 char *, size_t);
179 static const char *lacp_format_state(uint8_t, char *, size_t);
180 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
181 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
182 size_t);
183 static const char *lacp_format_portid(const struct lacp_portid *, char *,
184 size_t);
185 static void lacp_dprintf(const struct lacp_port *, const char *, ...)
186 __attribute__((__format__(__printf__, 2, 3)));
187 #define LACP_DPRINTF(a) lacp_dprintf a
188 #else
189 #define LACP_DPRINTF(a) /* nothing */
190 #endif
191
192 /*
193 * partner administration variables.
194 * XXX should be configurable.
195 */
196
197 static const struct lacp_peerinfo lacp_partner_admin = {
198 .lip_systemid = { .lsi_prio = 0xffff },
199 .lip_portid = { .lpi_prio = 0xffff },
200 #if 1
201 /* optimistic */
202 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
203 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
204 #else
205 /* pessimistic */
206 .lip_state = 0,
207 #endif
208 };
209
210 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
211 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
212 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
213 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
214 };
215
216 struct mbuf *
217 lacp_input(struct lagg_port *lgp, struct mbuf *m)
218 {
219 struct lacp_port *lp = LACP_PORT(lgp);
220 uint8_t subtype;
221
222 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
223 m_freem(m);
224 return (NULL);
225 }
226
227 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
228 switch (subtype) {
229 case SLOWPROTOCOLS_SUBTYPE_LACP:
230 lacp_pdu_input(lp, m);
231 return (NULL);
232
233 case SLOWPROTOCOLS_SUBTYPE_MARKER:
234 lacp_marker_input(lp, m);
235 return (NULL);
236 }
237
238 /* Not a subtype we are interested in */
239 return (m);
240 }
241
242 /*
243 * lacp_pdu_input: process lacpdu
244 */
245 static int
246 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
247 {
248 struct lacp_softc *lsc = lp->lp_lsc;
249 struct lacpdu *du;
250 int error = 0;
251
252 if (m->m_pkthdr.len != sizeof(*du)) {
253 goto bad;
254 }
255
256 if ((m->m_flags & M_MCAST) == 0) {
257 goto bad;
258 }
259
260 if (m->m_len < sizeof(*du)) {
261 m = m_pullup(m, sizeof(*du));
262 if (m == NULL) {
263 return (ENOMEM);
264 }
265 }
266
267 du = mtod(m, struct lacpdu *);
268
269 if (memcmp(&du->ldu_eh.ether_dhost,
270 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
271 goto bad;
272 }
273
274 /*
275 * ignore the version for compatibility with
276 * the future protocol revisions.
277 */
278 #if 0
279 if (du->ldu_sph.sph_version != 1) {
280 goto bad;
281 }
282 #endif
283
284 /*
285 * ignore tlv types for compatibility with
286 * the future protocol revisions.
287 */
288 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
289 lacp_info_tlv_template, FALSE)) {
290 goto bad;
291 }
292
293 #if defined(LACP_DEBUG)
294 LACP_DPRINTF((lp, "lacpdu receive\n"));
295 lacp_dump_lacpdu(du);
296 #endif /* defined(LACP_DEBUG) */
297
298 LACP_LOCK(lsc);
299 lacp_sm_rx(lp, du);
300 LACP_UNLOCK(lsc);
301
302 m_freem(m);
303 return (error);
304
305 bad:
306 m_freem(m);
307 return (EINVAL);
308 }
309
310 static void
311 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
312 {
313 struct lagg_port *lgp = lp->lp_lagg;
314 struct lagg_softc *sc = lgp->lp_softc;
315
316 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
317 memcpy(&info->lip_systemid.lsi_mac,
318 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
319 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
320 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
321 info->lip_state = lp->lp_state;
322 }
323
324 static void
325 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
326 {
327 struct ifnet *ifp = lp->lp_ifp;
328
329 /* Fill in the port index and system id (encoded as the MAC) */
330 info->mi_rq_port = htons(ifp->if_index);
331 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
332 info->mi_rq_xid = htonl(0);
333 }
334
335 static int
336 lacp_xmit_lacpdu(struct lacp_port *lp)
337 {
338 struct lagg_port *lgp = lp->lp_lagg;
339 struct mbuf *m;
340 struct lacpdu *du;
341 int error;
342
343 LACP_LOCK_ASSERT(lp->lp_lsc);
344
345 m = m_gethdr(M_DONTWAIT, MT_DATA);
346 if (m == NULL) {
347 return (ENOMEM);
348 }
349 m->m_len = m->m_pkthdr.len = sizeof(*du);
350
351 du = mtod(m, struct lacpdu *);
352 memset(du, 0, sizeof(*du));
353
354 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
355 ETHER_ADDR_LEN);
356 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
357 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
358
359 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
360 du->ldu_sph.sph_version = 1;
361
362 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
363 du->ldu_actor = lp->lp_actor;
364
365 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
366 sizeof(du->ldu_partner));
367 du->ldu_partner = lp->lp_partner;
368
369 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
370 sizeof(du->ldu_collector));
371 du->ldu_collector.lci_maxdelay = 0;
372
373 #if defined(LACP_DEBUG)
374 LACP_DPRINTF((lp, "lacpdu transmit\n"));
375 lacp_dump_lacpdu(du);
376 #endif /* defined(LACP_DEBUG) */
377
378 m->m_flags |= M_MCAST;
379
380 /*
381 * XXX should use higher priority queue.
382 * otherwise network congestion can break aggregation.
383 */
384
385 error = lagg_enqueue(lp->lp_ifp, m);
386 return (error);
387 }
388
389 static int
390 lacp_xmit_marker(struct lacp_port *lp)
391 {
392 struct lagg_port *lgp = lp->lp_lagg;
393 struct mbuf *m;
394 struct markerdu *mdu;
395 int error;
396
397 LACP_LOCK_ASSERT(lp->lp_lsc);
398
399 m = m_gethdr(M_DONTWAIT, MT_DATA);
400 if (m == NULL) {
401 return (ENOMEM);
402 }
403 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
404
405 mdu = mtod(m, struct markerdu *);
406 memset(mdu, 0, sizeof(*mdu));
407
408 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
409 ETHER_ADDR_LEN);
410 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
411 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
412
413 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
414 mdu->mdu_sph.sph_version = 1;
415
416 /* Bump the transaction id and copy over the marker info */
417 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
418 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
419 mdu->mdu_info = lp->lp_marker;
420
421 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
422 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
423 ntohl(mdu->mdu_info.mi_rq_xid)));
424
425 m->m_flags |= M_MCAST;
426 error = lagg_enqueue(lp->lp_ifp, m);
427 return (error);
428 }
429
430 void
431 lacp_linkstate(struct lagg_port *lgp)
432 {
433 struct lacp_port *lp = LACP_PORT(lgp);
434 struct lacp_softc *lsc = lp->lp_lsc;
435 struct ifnet *ifp = lgp->lp_ifp;
436 struct ifmediareq ifmr;
437 int error = 0;
438 u_int media;
439 uint8_t old_state;
440 uint16_t old_key;
441
442 bzero((char *)&ifmr, sizeof(ifmr));
443 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
444 if (error != 0)
445 return;
446
447 LACP_LOCK(lsc);
448 media = ifmr.ifm_active;
449 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
450 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
451 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
452 old_state = lp->lp_state;
453 old_key = lp->lp_key;
454
455 lp->lp_media = media;
456 /*
457 * If the port is not an active full duplex Ethernet link then it can
458 * not be aggregated.
459 */
460 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
461 ifp->if_link_state != LINK_STATE_UP) {
462 lacp_port_disable(lp);
463 } else {
464 lacp_port_enable(lp);
465 }
466 lp->lp_key = lacp_compose_key(lp);
467
468 if (old_state != lp->lp_state || old_key != lp->lp_key) {
469 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
470 lp->lp_selected = LACP_UNSELECTED;
471 }
472 LACP_UNLOCK(lsc);
473 }
474
475 static void
476 lacp_tick(void *arg)
477 {
478 struct lacp_softc *lsc = arg;
479 struct lacp_port *lp;
480
481 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
482 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
483 continue;
484
485 lacp_run_timers(lp);
486
487 lacp_select(lp);
488 lacp_sm_mux(lp);
489 lacp_sm_tx(lp);
490 lacp_sm_ptx_tx_schedule(lp);
491 }
492 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
493 }
494
495 int
496 lacp_port_create(struct lagg_port *lgp)
497 {
498 struct lagg_softc *sc = lgp->lp_softc;
499 struct lacp_softc *lsc = LACP_SOFTC(sc);
500 struct lacp_port *lp;
501 struct ifnet *ifp = lgp->lp_ifp;
502 struct sockaddr_dl sdl;
503 struct ifmultiaddr *rifma = NULL;
504 int error;
505
506 boolean_t active = TRUE; /* XXX should be configurable */
507 boolean_t fast = FALSE; /* XXX should be configurable */
508
509 bzero((char *)&sdl, sizeof(sdl));
510 sdl.sdl_len = sizeof(sdl);
511 sdl.sdl_family = AF_LINK;
512 sdl.sdl_index = ifp->if_index;
513 sdl.sdl_type = IFT_ETHER;
514 sdl.sdl_alen = ETHER_ADDR_LEN;
515
516 bcopy(ðermulticastaddr_slowprotocols,
517 LLADDR(&sdl), ETHER_ADDR_LEN);
518 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
519 if (error) {
520 printf("%s: ADDMULTI failed on %s\n", __func__, lgp->lp_ifname);
521 return (error);
522 }
523
524 lp = malloc(sizeof(struct lacp_port),
525 M_DEVBUF, M_NOWAIT|M_ZERO);
526 if (lp == NULL)
527 return (ENOMEM);
528
529 LACP_LOCK(lsc);
530 lgp->lp_psc = (caddr_t)lp;
531 lp->lp_ifp = ifp;
532 lp->lp_lagg = lgp;
533 lp->lp_lsc = lsc;
534 lp->lp_ifma = rifma;
535
536 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
537
538 lacp_fill_actorinfo(lp, &lp->lp_actor);
539 lacp_fill_markerinfo(lp, &lp->lp_marker);
540 lp->lp_state =
541 (active ? LACP_STATE_ACTIVITY : 0) |
542 (fast ? LACP_STATE_TIMEOUT : 0);
543 lp->lp_aggregator = NULL;
544 lacp_sm_rx_set_expired(lp);
545 LACP_UNLOCK(lsc);
546 lacp_linkstate(lgp);
547
548 return (0);
549 }
550
551 void
552 lacp_port_destroy(struct lagg_port *lgp)
553 {
554 struct lacp_port *lp = LACP_PORT(lgp);
555 struct lacp_softc *lsc = lp->lp_lsc;
556 int i;
557
558 LACP_LOCK(lsc);
559 for (i = 0; i < LACP_NTIMER; i++) {
560 LACP_TIMER_DISARM(lp, i);
561 }
562
563 lacp_disable_collecting(lp);
564 lacp_disable_distributing(lp);
565 lacp_unselect(lp);
566
567 /* The address may have already been removed by if_purgemaddrs() */
568 if (!lgp->lp_detaching)
569 if_delmulti_ifma(lp->lp_ifma);
570
571 LIST_REMOVE(lp, lp_next);
572 LACP_UNLOCK(lsc);
573 free(lp, M_DEVBUF);
574 }
575
576 void
577 lacp_req(struct lagg_softc *sc, caddr_t data)
578 {
579 struct lacp_opreq *req = (struct lacp_opreq *)data;
580 struct lacp_softc *lsc = LACP_SOFTC(sc);
581 struct lacp_aggregator *la = lsc->lsc_active_aggregator;
582
583 LACP_LOCK(lsc);
584 bzero(req, sizeof(struct lacp_opreq));
585 if (la != NULL) {
586 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
587 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
588 ETHER_ADDR_LEN);
589 req->actor_key = ntohs(la->la_actor.lip_key);
590 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
591 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
592 req->actor_state = la->la_actor.lip_state;
593
594 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
595 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
596 ETHER_ADDR_LEN);
597 req->partner_key = ntohs(la->la_partner.lip_key);
598 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
599 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
600 req->partner_state = la->la_partner.lip_state;
601 }
602 LACP_UNLOCK(lsc);
603 }
604
605 void
606 lacp_portreq(struct lagg_port *lgp, caddr_t data)
607 {
608 struct lacp_opreq *req = (struct lacp_opreq *)data;
609 struct lacp_port *lp = LACP_PORT(lgp);
610 struct lacp_softc *lsc = lp->lp_lsc;
611
612 LACP_LOCK(lsc);
613 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
614 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
615 ETHER_ADDR_LEN);
616 req->actor_key = ntohs(lp->lp_actor.lip_key);
617 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
618 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
619 req->actor_state = lp->lp_actor.lip_state;
620
621 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
622 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
623 ETHER_ADDR_LEN);
624 req->partner_key = ntohs(lp->lp_partner.lip_key);
625 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
626 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
627 req->partner_state = lp->lp_partner.lip_state;
628 LACP_UNLOCK(lsc);
629 }
630
631 static void
632 lacp_disable_collecting(struct lacp_port *lp)
633 {
634 LACP_DPRINTF((lp, "collecting disabled\n"));
635 lp->lp_state &= ~LACP_STATE_COLLECTING;
636 }
637
638 static void
639 lacp_enable_collecting(struct lacp_port *lp)
640 {
641 LACP_DPRINTF((lp, "collecting enabled\n"));
642 lp->lp_state |= LACP_STATE_COLLECTING;
643 }
644
645 static void
646 lacp_disable_distributing(struct lacp_port *lp)
647 {
648 struct lacp_aggregator *la = lp->lp_aggregator;
649 struct lacp_softc *lsc = lp->lp_lsc;
650 #if defined(LACP_DEBUG)
651 char buf[LACP_LAGIDSTR_MAX+1];
652 #endif /* defined(LACP_DEBUG) */
653
654 LACP_LOCK_ASSERT(lsc);
655
656 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
657 return;
658 }
659
660 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
661 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
662 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
663
664 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
665 "nports %d -> %d\n",
666 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
667 la->la_nports, la->la_nports - 1));
668
669 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
670 la->la_nports--;
671
672 if (lsc->lsc_active_aggregator == la) {
673 lacp_suppress_distributing(lsc, la);
674 lacp_select_active_aggregator(lsc);
675 /* regenerate the port map, the active aggregator has changed */
676 lacp_update_portmap(lsc);
677 }
678
679 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
680 }
681
682 static void
683 lacp_enable_distributing(struct lacp_port *lp)
684 {
685 struct lacp_aggregator *la = lp->lp_aggregator;
686 struct lacp_softc *lsc = lp->lp_lsc;
687 #if defined(LACP_DEBUG)
688 char buf[LACP_LAGIDSTR_MAX+1];
689 #endif /* defined(LACP_DEBUG) */
690
691 LACP_LOCK_ASSERT(lsc);
692
693 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
694 return;
695 }
696
697 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
698 "nports %d -> %d\n",
699 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
700 la->la_nports, la->la_nports + 1));
701
702 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
703 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
704 la->la_nports++;
705
706 lp->lp_state |= LACP_STATE_DISTRIBUTING;
707
708 if (lsc->lsc_active_aggregator == la) {
709 lacp_suppress_distributing(lsc, la);
710 lacp_update_portmap(lsc);
711 } else
712 /* try to become the active aggregator */
713 lacp_select_active_aggregator(lsc);
714 }
715
716 static void
717 lacp_transit_expire(void *vp)
718 {
719 struct lacp_softc *lsc = vp;
720
721 LACP_LOCK_ASSERT(lsc);
722
723 LACP_DPRINTF((NULL, "%s\n", __func__));
724 lsc->lsc_suppress_distributing = FALSE;
725 }
726
727 int
728 lacp_attach(struct lagg_softc *sc)
729 {
730 struct lacp_softc *lsc;
731
732 lsc = malloc(sizeof(struct lacp_softc),
733 M_DEVBUF, M_NOWAIT|M_ZERO);
734 if (lsc == NULL)
735 return (ENOMEM);
736
737 sc->sc_psc = (caddr_t)lsc;
738 lsc->lsc_softc = sc;
739
740 lsc->lsc_hashkey = arc4random();
741 lsc->lsc_active_aggregator = NULL;
742 LACP_LOCK_INIT(lsc);
743 TAILQ_INIT(&lsc->lsc_aggregators);
744 LIST_INIT(&lsc->lsc_ports);
745
746 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
747 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
748
749 /* if the lagg is already up then do the same */
750 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
751 lacp_init(sc);
752
753 return (0);
754 }
755
756 int
757 lacp_detach(struct lagg_softc *sc)
758 {
759 struct lacp_softc *lsc = LACP_SOFTC(sc);
760
761 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
762 ("aggregators still active"));
763 KASSERT(lsc->lsc_active_aggregator == NULL,
764 ("aggregator still attached"));
765
766 sc->sc_psc = NULL;
767 callout_drain(&lsc->lsc_transit_callout);
768 callout_drain(&lsc->lsc_callout);
769
770 LACP_LOCK_DESTROY(lsc);
771 free(lsc, M_DEVBUF);
772 return (0);
773 }
774
775 void
776 lacp_init(struct lagg_softc *sc)
777 {
778 struct lacp_softc *lsc = LACP_SOFTC(sc);
779
780 LACP_LOCK(lsc);
781 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
782 LACP_UNLOCK(lsc);
783 }
784
785 void
786 lacp_stop(struct lagg_softc *sc)
787 {
788 struct lacp_softc *lsc = LACP_SOFTC(sc);
789
790 LACP_LOCK(lsc);
791 callout_stop(&lsc->lsc_transit_callout);
792 callout_stop(&lsc->lsc_callout);
793 LACP_UNLOCK(lsc);
794 }
795
796 struct lagg_port *
797 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
798 {
799 struct lacp_softc *lsc = LACP_SOFTC(sc);
800 struct lacp_portmap *pm;
801 struct lacp_port *lp;
802 uint32_t hash;
803
804 if (__predict_false(lsc->lsc_suppress_distributing)) {
805 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
806 return (NULL);
807 }
808
809 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
810 if (pm->pm_count == 0) {
811 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
812 return (NULL);
813 }
814
815 if (sc->use_flowid && (m->m_flags & M_FLOWID))
816 hash = m->m_pkthdr.flowid;
817 else
818 hash = lagg_hashmbuf(m, lsc->lsc_hashkey);
819 hash %= pm->pm_count;
820 lp = pm->pm_map[hash];
821
822 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
823 ("aggregated port is not distributing"));
824
825 return (lp->lp_lagg);
826 }
827 /*
828 * lacp_suppress_distributing: drop transmit packets for a while
829 * to preserve packet ordering.
830 */
831
832 static void
833 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
834 {
835 struct lacp_port *lp;
836
837 if (lsc->lsc_active_aggregator != la) {
838 return;
839 }
840
841 LACP_DPRINTF((NULL, "%s\n", __func__));
842 lsc->lsc_suppress_distributing = TRUE;
843
844 /* send a marker frame down each port to verify the queues are empty */
845 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
846 lp->lp_flags |= LACP_PORT_MARK;
847 lacp_xmit_marker(lp);
848 }
849
850 /* set a timeout for the marker frames */
851 callout_reset(&lsc->lsc_transit_callout,
852 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
853 }
854
855 static int
856 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
857 const struct lacp_peerinfo *b)
858 {
859 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
860 }
861
862 static int
863 lacp_compare_systemid(const struct lacp_systemid *a,
864 const struct lacp_systemid *b)
865 {
866 return (memcmp(a, b, sizeof(*a)));
867 }
868
869 #if 0 /* unused */
870 static int
871 lacp_compare_portid(const struct lacp_portid *a,
872 const struct lacp_portid *b)
873 {
874 return (memcmp(a, b, sizeof(*a)));
875 }
876 #endif
877
878 static uint64_t
879 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
880 {
881 struct lacp_port *lp;
882 uint64_t speed;
883
884 lp = TAILQ_FIRST(&la->la_ports);
885 if (lp == NULL) {
886 return (0);
887 }
888
889 speed = ifmedia_baudrate(lp->lp_media);
890 speed *= la->la_nports;
891 if (speed == 0) {
892 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
893 lp->lp_media, la->la_nports));
894 }
895
896 return (speed);
897 }
898
899 /*
900 * lacp_select_active_aggregator: select an aggregator to be used to transmit
901 * packets from lagg(4) interface.
902 */
903
904 static void
905 lacp_select_active_aggregator(struct lacp_softc *lsc)
906 {
907 struct lagg_softc *sc = lsc->lsc_softc;
908 struct lacp_aggregator *la;
909 struct lacp_aggregator *best_la = NULL;
910 uint64_t best_speed = 0;
911 #if defined(LACP_DEBUG)
912 char buf[LACP_LAGIDSTR_MAX+1];
913 #endif /* defined(LACP_DEBUG) */
914
915 LACP_DPRINTF((NULL, "%s:\n", __func__));
916
917 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
918 uint64_t speed;
919
920 if (la->la_nports == 0) {
921 continue;
922 }
923
924 speed = lacp_aggregator_bandwidth(la);
925 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
926 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
927 speed, la->la_nports));
928
929 /* This aggregator is chosen if
930 * the partner has a better system priority
931 * or, the total aggregated speed is higher
932 * or, it is already the chosen aggregator
933 */
934 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
935 LACP_SYS_PRI(best_la->la_partner)) ||
936 speed > best_speed ||
937 (speed == best_speed &&
938 la == lsc->lsc_active_aggregator)) {
939 best_la = la;
940 best_speed = speed;
941 }
942 }
943
944 KASSERT(best_la == NULL || best_la->la_nports > 0,
945 ("invalid aggregator refcnt"));
946 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
947 ("invalid aggregator list"));
948
949 #if defined(LACP_DEBUG)
950 if (lsc->lsc_active_aggregator != best_la) {
951 LACP_DPRINTF((NULL, "active aggregator changed\n"));
952 LACP_DPRINTF((NULL, "old %s\n",
953 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
954 buf, sizeof(buf))));
955 } else {
956 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
957 }
958 LACP_DPRINTF((NULL, "new %s\n",
959 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
960 #endif /* defined(LACP_DEBUG) */
961
962 if (lsc->lsc_active_aggregator != best_la) {
963 sc->sc_ifp->if_baudrate = best_speed;
964 lsc->lsc_active_aggregator = best_la;
965 lacp_update_portmap(lsc);
966 if (best_la) {
967 lacp_suppress_distributing(lsc, best_la);
968 }
969 }
970 }
971
972 /*
973 * Updated the inactive portmap array with the new list of ports and
974 * make it live.
975 */
976 static void
977 lacp_update_portmap(struct lacp_softc *lsc)
978 {
979 struct lacp_aggregator *la;
980 struct lacp_portmap *p;
981 struct lacp_port *lp;
982 u_int newmap;
983 int i;
984
985 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
986 p = &lsc->lsc_pmap[newmap];
987 la = lsc->lsc_active_aggregator;
988 bzero(p, sizeof(struct lacp_portmap));
989
990 if (la != NULL && la->la_nports > 0) {
991 p->pm_count = la->la_nports;
992 i = 0;
993 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
994 p->pm_map[i++] = lp;
995 KASSERT(i == p->pm_count, ("Invalid port count"));
996 }
997
998 /* switch the active portmap over */
999 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1000 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1001 lsc->lsc_activemap,
1002 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1003 }
1004
1005 static uint16_t
1006 lacp_compose_key(struct lacp_port *lp)
1007 {
1008 struct lagg_port *lgp = lp->lp_lagg;
1009 struct lagg_softc *sc = lgp->lp_softc;
1010 u_int media = lp->lp_media;
1011 uint16_t key;
1012
1013 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1014
1015 /*
1016 * non-aggregatable links should have unique keys.
1017 *
1018 * XXX this isn't really unique as if_index is 16 bit.
1019 */
1020
1021 /* bit 0..14: (some bits of) if_index of this port */
1022 key = lp->lp_ifp->if_index;
1023 /* bit 15: 1 */
1024 key |= 0x8000;
1025 } else {
1026 u_int subtype = IFM_SUBTYPE(media);
1027
1028 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1029 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1030
1031 /* bit 0..4: IFM_SUBTYPE */
1032 key = subtype;
1033 /* bit 5..14: (some bits of) if_index of lagg device */
1034 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1035 /* bit 15: 0 */
1036 }
1037 return (htons(key));
1038 }
1039
1040 static void
1041 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1042 {
1043 #if defined(LACP_DEBUG)
1044 char buf[LACP_LAGIDSTR_MAX+1];
1045 #endif
1046
1047 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1048 __func__,
1049 lacp_format_lagid(&la->la_actor, &la->la_partner,
1050 buf, sizeof(buf)),
1051 la->la_refcnt, la->la_refcnt + 1));
1052
1053 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1054 la->la_refcnt++;
1055 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1056 }
1057
1058 static void
1059 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1060 {
1061 #if defined(LACP_DEBUG)
1062 char buf[LACP_LAGIDSTR_MAX+1];
1063 #endif
1064
1065 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1066 __func__,
1067 lacp_format_lagid(&la->la_actor, &la->la_partner,
1068 buf, sizeof(buf)),
1069 la->la_refcnt, la->la_refcnt - 1));
1070
1071 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1072 la->la_refcnt--;
1073 if (la->la_refcnt > 0) {
1074 return;
1075 }
1076
1077 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1078 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1079
1080 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1081
1082 free(la, M_DEVBUF);
1083 }
1084
1085 /*
1086 * lacp_aggregator_get: allocate an aggregator.
1087 */
1088
1089 static struct lacp_aggregator *
1090 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1091 {
1092 struct lacp_aggregator *la;
1093
1094 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1095 if (la) {
1096 la->la_refcnt = 1;
1097 la->la_nports = 0;
1098 TAILQ_INIT(&la->la_ports);
1099 la->la_pending = 0;
1100 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1101 }
1102
1103 return (la);
1104 }
1105
1106 /*
1107 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1108 */
1109
1110 static void
1111 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1112 {
1113 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1114 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1115
1116 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1117 }
1118
1119 static void
1120 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1121 const struct lacp_peerinfo *lpi_port)
1122 {
1123 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1124 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1125 lpi_aggr->lip_key = lpi_port->lip_key;
1126 }
1127
1128 /*
1129 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1130 */
1131
1132 static int
1133 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1134 const struct lacp_port *lp)
1135 {
1136 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1137 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1138 return (0);
1139 }
1140
1141 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1142 return (0);
1143 }
1144
1145 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1146 return (0);
1147 }
1148
1149 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1150 return (0);
1151 }
1152
1153 return (1);
1154 }
1155
1156 static int
1157 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1158 const struct lacp_peerinfo *b)
1159 {
1160 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1161 sizeof(a->lip_systemid))) {
1162 return (0);
1163 }
1164
1165 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1166 return (0);
1167 }
1168
1169 return (1);
1170 }
1171
1172 static void
1173 lacp_port_enable(struct lacp_port *lp)
1174 {
1175 lp->lp_state |= LACP_STATE_AGGREGATION;
1176 }
1177
1178 static void
1179 lacp_port_disable(struct lacp_port *lp)
1180 {
1181 lacp_set_mux(lp, LACP_MUX_DETACHED);
1182
1183 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1184 lp->lp_selected = LACP_UNSELECTED;
1185 lacp_sm_rx_record_default(lp);
1186 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1187 lp->lp_state &= ~LACP_STATE_EXPIRED;
1188 }
1189
1190 /*
1191 * lacp_select: select an aggregator. create one if necessary.
1192 */
1193 static void
1194 lacp_select(struct lacp_port *lp)
1195 {
1196 struct lacp_softc *lsc = lp->lp_lsc;
1197 struct lacp_aggregator *la;
1198 #if defined(LACP_DEBUG)
1199 char buf[LACP_LAGIDSTR_MAX+1];
1200 #endif
1201
1202 if (lp->lp_aggregator) {
1203 return;
1204 }
1205
1206 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1207 ("timer_wait_while still active"));
1208
1209 LACP_DPRINTF((lp, "port lagid=%s\n",
1210 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1211 buf, sizeof(buf))));
1212
1213 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1214 if (lacp_aggregator_is_compatible(la, lp)) {
1215 break;
1216 }
1217 }
1218
1219 if (la == NULL) {
1220 la = lacp_aggregator_get(lsc, lp);
1221 if (la == NULL) {
1222 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1223
1224 /*
1225 * will retry on the next tick.
1226 */
1227
1228 return;
1229 }
1230 lacp_fill_aggregator_id(la, lp);
1231 LACP_DPRINTF((lp, "aggregator created\n"));
1232 } else {
1233 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1234 if (la->la_refcnt == LACP_MAX_PORTS)
1235 return;
1236 lacp_aggregator_addref(lsc, la);
1237 }
1238
1239 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1240 lacp_format_lagid(&la->la_actor, &la->la_partner,
1241 buf, sizeof(buf))));
1242
1243 lp->lp_aggregator = la;
1244 lp->lp_selected = LACP_SELECTED;
1245 }
1246
1247 /*
1248 * lacp_unselect: finish unselect/detach process.
1249 */
1250
1251 static void
1252 lacp_unselect(struct lacp_port *lp)
1253 {
1254 struct lacp_softc *lsc = lp->lp_lsc;
1255 struct lacp_aggregator *la = lp->lp_aggregator;
1256
1257 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1258 ("timer_wait_while still active"));
1259
1260 if (la == NULL) {
1261 return;
1262 }
1263
1264 lp->lp_aggregator = NULL;
1265 lacp_aggregator_delref(lsc, la);
1266 }
1267
1268 /* mux machine */
1269
1270 static void
1271 lacp_sm_mux(struct lacp_port *lp)
1272 {
1273 enum lacp_mux_state new_state;
1274 boolean_t p_sync =
1275 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1276 boolean_t p_collecting =
1277 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1278 enum lacp_selected selected = lp->lp_selected;
1279 struct lacp_aggregator *la;
1280
1281 /* LACP_DPRINTF((lp, "%s: state %d\n", __func__, lp->lp_mux_state)); */
1282
1283 re_eval:
1284 la = lp->lp_aggregator;
1285 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1286 ("MUX not detached"));
1287 new_state = lp->lp_mux_state;
1288 switch (lp->lp_mux_state) {
1289 case LACP_MUX_DETACHED:
1290 if (selected != LACP_UNSELECTED) {
1291 new_state = LACP_MUX_WAITING;
1292 }
1293 break;
1294 case LACP_MUX_WAITING:
1295 KASSERT(la->la_pending > 0 ||
1296 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1297 ("timer_wait_while still active"));
1298 if (selected == LACP_SELECTED && la->la_pending == 0) {
1299 new_state = LACP_MUX_ATTACHED;
1300 } else if (selected == LACP_UNSELECTED) {
1301 new_state = LACP_MUX_DETACHED;
1302 }
1303 break;
1304 case LACP_MUX_ATTACHED:
1305 if (selected == LACP_SELECTED && p_sync) {
1306 new_state = LACP_MUX_COLLECTING;
1307 } else if (selected != LACP_SELECTED) {
1308 new_state = LACP_MUX_DETACHED;
1309 }
1310 break;
1311 case LACP_MUX_COLLECTING:
1312 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1313 new_state = LACP_MUX_DISTRIBUTING;
1314 } else if (selected != LACP_SELECTED || !p_sync) {
1315 new_state = LACP_MUX_ATTACHED;
1316 }
1317 break;
1318 case LACP_MUX_DISTRIBUTING:
1319 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1320 new_state = LACP_MUX_COLLECTING;
1321 }
1322 break;
1323 default:
1324 panic("%s: unknown state", __func__);
1325 }
1326
1327 if (lp->lp_mux_state == new_state) {
1328 return;
1329 }
1330
1331 lacp_set_mux(lp, new_state);
1332 goto re_eval;
1333 }
1334
1335 static void
1336 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1337 {
1338 struct lacp_aggregator *la = lp->lp_aggregator;
1339
1340 if (lp->lp_mux_state == new_state) {
1341 return;
1342 }
1343
1344 switch (new_state) {
1345 case LACP_MUX_DETACHED:
1346 lp->lp_state &= ~LACP_STATE_SYNC;
1347 lacp_disable_distributing(lp);
1348 lacp_disable_collecting(lp);
1349 lacp_sm_assert_ntt(lp);
1350 /* cancel timer */
1351 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1352 KASSERT(la->la_pending > 0,
1353 ("timer_wait_while not active"));
1354 la->la_pending--;
1355 }
1356 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1357 lacp_unselect(lp);
1358 break;
1359 case LACP_MUX_WAITING:
1360 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1361 LACP_AGGREGATE_WAIT_TIME);
1362 la->la_pending++;
1363 break;
1364 case LACP_MUX_ATTACHED:
1365 lp->lp_state |= LACP_STATE_SYNC;
1366 lacp_disable_collecting(lp);
1367 lacp_sm_assert_ntt(lp);
1368 break;
1369 case LACP_MUX_COLLECTING:
1370 lacp_enable_collecting(lp);
1371 lacp_disable_distributing(lp);
1372 lacp_sm_assert_ntt(lp);
1373 break;
1374 case LACP_MUX_DISTRIBUTING:
1375 lacp_enable_distributing(lp);
1376 break;
1377 default:
1378 panic("%s: unknown state", __func__);
1379 }
1380
1381 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1382
1383 lp->lp_mux_state = new_state;
1384 }
1385
1386 static void
1387 lacp_sm_mux_timer(struct lacp_port *lp)
1388 {
1389 struct lacp_aggregator *la = lp->lp_aggregator;
1390 #if defined(LACP_DEBUG)
1391 char buf[LACP_LAGIDSTR_MAX+1];
1392 #endif
1393
1394 KASSERT(la->la_pending > 0, ("no pending event"));
1395
1396 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1397 lacp_format_lagid(&la->la_actor, &la->la_partner,
1398 buf, sizeof(buf)),
1399 la->la_pending, la->la_pending - 1));
1400
1401 la->la_pending--;
1402 }
1403
1404 /* periodic transmit machine */
1405
1406 static void
1407 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1408 {
1409 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1410 LACP_STATE_TIMEOUT)) {
1411 return;
1412 }
1413
1414 LACP_DPRINTF((lp, "partner timeout changed\n"));
1415
1416 /*
1417 * FAST_PERIODIC -> SLOW_PERIODIC
1418 * or
1419 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1420 *
1421 * let lacp_sm_ptx_tx_schedule to update timeout.
1422 */
1423
1424 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1425
1426 /*
1427 * if timeout has been shortened, assert NTT.
1428 */
1429
1430 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1431 lacp_sm_assert_ntt(lp);
1432 }
1433 }
1434
1435 static void
1436 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1437 {
1438 int timeout;
1439
1440 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1441 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1442
1443 /*
1444 * NO_PERIODIC
1445 */
1446
1447 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1448 return;
1449 }
1450
1451 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1452 return;
1453 }
1454
1455 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1456 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1457
1458 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1459 }
1460
1461 static void
1462 lacp_sm_ptx_timer(struct lacp_port *lp)
1463 {
1464 lacp_sm_assert_ntt(lp);
1465 }
1466
1467 static void
1468 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1469 {
1470 int timeout;
1471
1472 /*
1473 * check LACP_DISABLED first
1474 */
1475
1476 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1477 return;
1478 }
1479
1480 /*
1481 * check loopback condition.
1482 */
1483
1484 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1485 &lp->lp_actor.lip_systemid)) {
1486 return;
1487 }
1488
1489 /*
1490 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1491 */
1492
1493 lacp_sm_rx_update_selected(lp, du);
1494 lacp_sm_rx_update_ntt(lp, du);
1495 lacp_sm_rx_record_pdu(lp, du);
1496
1497 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1498 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1499 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1500
1501 lp->lp_state &= ~LACP_STATE_EXPIRED;
1502
1503 /*
1504 * kick transmit machine without waiting the next tick.
1505 */
1506
1507 lacp_sm_tx(lp);
1508 }
1509
1510 static void
1511 lacp_sm_rx_set_expired(struct lacp_port *lp)
1512 {
1513 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1514 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1515 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1516 lp->lp_state |= LACP_STATE_EXPIRED;
1517 }
1518
1519 static void
1520 lacp_sm_rx_timer(struct lacp_port *lp)
1521 {
1522 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1523 /* CURRENT -> EXPIRED */
1524 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1525 lacp_sm_rx_set_expired(lp);
1526 } else {
1527 /* EXPIRED -> DEFAULTED */
1528 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1529 lacp_sm_rx_update_default_selected(lp);
1530 lacp_sm_rx_record_default(lp);
1531 lp->lp_state &= ~LACP_STATE_EXPIRED;
1532 }
1533 }
1534
1535 static void
1536 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1537 {
1538 boolean_t active;
1539 uint8_t oldpstate;
1540 #if defined(LACP_DEBUG)
1541 char buf[LACP_STATESTR_MAX+1];
1542 #endif
1543
1544 /* LACP_DPRINTF((lp, "%s\n", __func__)); */
1545
1546 oldpstate = lp->lp_partner.lip_state;
1547
1548 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1549 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1550 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1551
1552 lp->lp_partner = du->ldu_actor;
1553 if (active &&
1554 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1555 LACP_STATE_AGGREGATION) &&
1556 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1557 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1558 /* XXX nothing? */
1559 } else {
1560 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1561 }
1562
1563 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1564
1565 if (oldpstate != lp->lp_partner.lip_state) {
1566 LACP_DPRINTF((lp, "old pstate %s\n",
1567 lacp_format_state(oldpstate, buf, sizeof(buf))));
1568 LACP_DPRINTF((lp, "new pstate %s\n",
1569 lacp_format_state(lp->lp_partner.lip_state, buf,
1570 sizeof(buf))));
1571 }
1572
1573 lacp_sm_ptx_update_timeout(lp, oldpstate);
1574 }
1575
1576 static void
1577 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1578 {
1579 /* LACP_DPRINTF((lp, "%s\n", __func__)); */
1580
1581 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1582 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1583 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1584 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1585 lacp_sm_assert_ntt(lp);
1586 }
1587 }
1588
1589 static void
1590 lacp_sm_rx_record_default(struct lacp_port *lp)
1591 {
1592 uint8_t oldpstate;
1593
1594 /* LACP_DPRINTF((lp, "%s\n", __func__)); */
1595
1596 oldpstate = lp->lp_partner.lip_state;
1597 lp->lp_partner = lacp_partner_admin;
1598 lp->lp_state |= LACP_STATE_DEFAULTED;
1599 lacp_sm_ptx_update_timeout(lp, oldpstate);
1600 }
1601
1602 static void
1603 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1604 const struct lacp_peerinfo *info)
1605 {
1606 /* LACP_DPRINTF((lp, "%s\n", __func__)); */
1607
1608 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1609 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1610 LACP_STATE_AGGREGATION)) {
1611 lp->lp_selected = LACP_UNSELECTED;
1612 /* mux machine will clean up lp->lp_aggregator */
1613 }
1614 }
1615
1616 static void
1617 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1618 {
1619 /* LACP_DPRINTF((lp, "%s\n", __func__)); */
1620
1621 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1622 }
1623
1624 static void
1625 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1626 {
1627 /* LACP_DPRINTF((lp, "%s\n", __func__)); */
1628
1629 lacp_sm_rx_update_selected_from_peerinfo(lp, &lacp_partner_admin);
1630 }
1631
1632 /* transmit machine */
1633
1634 static void
1635 lacp_sm_tx(struct lacp_port *lp)
1636 {
1637 int error;
1638
1639 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1640 #if 1
1641 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1642 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1643 #endif
1644 ) {
1645 lp->lp_flags &= ~LACP_PORT_NTT;
1646 }
1647
1648 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1649 return;
1650 }
1651
1652 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1653 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1654 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1655 LACP_DPRINTF((lp, "rate limited pdu\n"));
1656 return;
1657 }
1658
1659 error = lacp_xmit_lacpdu(lp);
1660
1661 if (error == 0) {
1662 lp->lp_flags &= ~LACP_PORT_NTT;
1663 } else {
1664 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1665 error));
1666 }
1667 }
1668
1669 static void
1670 lacp_sm_assert_ntt(struct lacp_port *lp)
1671 {
1672
1673 lp->lp_flags |= LACP_PORT_NTT;
1674 }
1675
1676 static void
1677 lacp_run_timers(struct lacp_port *lp)
1678 {
1679 int i;
1680
1681 for (i = 0; i < LACP_NTIMER; i++) {
1682 KASSERT(lp->lp_timer[i] >= 0,
1683 ("invalid timer value %d", lp->lp_timer[i]));
1684 if (lp->lp_timer[i] == 0) {
1685 continue;
1686 } else if (--lp->lp_timer[i] <= 0) {
1687 if (lacp_timer_funcs[i]) {
1688 (*lacp_timer_funcs[i])(lp);
1689 }
1690 }
1691 }
1692 }
1693
1694 int
1695 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1696 {
1697 struct lacp_softc *lsc = lp->lp_lsc;
1698 struct lagg_port *lgp = lp->lp_lagg;
1699 struct lacp_port *lp2;
1700 struct markerdu *mdu;
1701 int error = 0;
1702 int pending = 0;
1703
1704 if (m->m_pkthdr.len != sizeof(*mdu)) {
1705 goto bad;
1706 }
1707
1708 if ((m->m_flags & M_MCAST) == 0) {
1709 goto bad;
1710 }
1711
1712 if (m->m_len < sizeof(*mdu)) {
1713 m = m_pullup(m, sizeof(*mdu));
1714 if (m == NULL) {
1715 return (ENOMEM);
1716 }
1717 }
1718
1719 mdu = mtod(m, struct markerdu *);
1720
1721 if (memcmp(&mdu->mdu_eh.ether_dhost,
1722 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
1723 goto bad;
1724 }
1725
1726 if (mdu->mdu_sph.sph_version != 1) {
1727 goto bad;
1728 }
1729
1730 switch (mdu->mdu_tlv.tlv_type) {
1731 case MARKER_TYPE_INFO:
1732 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1733 marker_info_tlv_template, TRUE)) {
1734 goto bad;
1735 }
1736 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
1737 memcpy(&mdu->mdu_eh.ether_dhost,
1738 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
1739 memcpy(&mdu->mdu_eh.ether_shost,
1740 lgp->lp_lladdr, ETHER_ADDR_LEN);
1741 error = lagg_enqueue(lp->lp_ifp, m);
1742 break;
1743
1744 case MARKER_TYPE_RESPONSE:
1745 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1746 marker_response_tlv_template, TRUE)) {
1747 goto bad;
1748 }
1749 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
1750 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
1751 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
1752
1753 /* Verify that it is the last marker we sent out */
1754 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
1755 sizeof(struct lacp_markerinfo)))
1756 goto bad;
1757
1758 LACP_LOCK(lsc);
1759 lp->lp_flags &= ~LACP_PORT_MARK;
1760
1761 if (lsc->lsc_suppress_distributing) {
1762 /* Check if any ports are waiting for a response */
1763 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
1764 if (lp2->lp_flags & LACP_PORT_MARK) {
1765 pending = 1;
1766 break;
1767 }
1768 }
1769
1770 if (pending == 0) {
1771 /* All interface queues are clear */
1772 LACP_DPRINTF((NULL, "queue flush complete\n"));
1773 lsc->lsc_suppress_distributing = FALSE;
1774 }
1775 }
1776 LACP_UNLOCK(lsc);
1777 m_freem(m);
1778 break;
1779
1780 default:
1781 goto bad;
1782 }
1783
1784 return (error);
1785
1786 bad:
1787 LACP_DPRINTF((lp, "bad marker frame\n"));
1788 m_freem(m);
1789 return (EINVAL);
1790 }
1791
1792 static int
1793 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
1794 const struct tlv_template *tmpl, boolean_t check_type)
1795 {
1796 while (/* CONSTCOND */ 1) {
1797 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
1798 return (EINVAL);
1799 }
1800 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
1801 tlv->tlv_length != tmpl->tmpl_length) {
1802 return (EINVAL);
1803 }
1804 if (tmpl->tmpl_type == 0) {
1805 break;
1806 }
1807 tlv = (const struct tlvhdr *)
1808 ((const char *)tlv + tlv->tlv_length);
1809 tmpl++;
1810 }
1811
1812 return (0);
1813 }
1814
1815 #if defined(LACP_DEBUG)
1816 const char *
1817 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
1818 {
1819 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
1820 (int)mac[0],
1821 (int)mac[1],
1822 (int)mac[2],
1823 (int)mac[3],
1824 (int)mac[4],
1825 (int)mac[5]);
1826
1827 return (buf);
1828 }
1829
1830 const char *
1831 lacp_format_systemid(const struct lacp_systemid *sysid,
1832 char *buf, size_t buflen)
1833 {
1834 char macbuf[LACP_MACSTR_MAX+1];
1835
1836 snprintf(buf, buflen, "%04X,%s",
1837 ntohs(sysid->lsi_prio),
1838 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
1839
1840 return (buf);
1841 }
1842
1843 const char *
1844 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
1845 {
1846 snprintf(buf, buflen, "%04X,%04X",
1847 ntohs(portid->lpi_prio),
1848 ntohs(portid->lpi_portno));
1849
1850 return (buf);
1851 }
1852
1853 const char *
1854 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
1855 {
1856 char sysid[LACP_SYSTEMIDSTR_MAX+1];
1857 char portid[LACP_PORTIDSTR_MAX+1];
1858
1859 snprintf(buf, buflen, "(%s,%04X,%s)",
1860 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
1861 ntohs(peer->lip_key),
1862 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
1863
1864 return (buf);
1865 }
1866
1867 const char *
1868 lacp_format_lagid(const struct lacp_peerinfo *a,
1869 const struct lacp_peerinfo *b, char *buf, size_t buflen)
1870 {
1871 char astr[LACP_PARTNERSTR_MAX+1];
1872 char bstr[LACP_PARTNERSTR_MAX+1];
1873
1874 #if 0
1875 /*
1876 * there's a convention to display small numbered peer
1877 * in the left.
1878 */
1879
1880 if (lacp_compare_peerinfo(a, b) > 0) {
1881 const struct lacp_peerinfo *t;
1882
1883 t = a;
1884 a = b;
1885 b = t;
1886 }
1887 #endif
1888
1889 snprintf(buf, buflen, "[%s,%s]",
1890 lacp_format_partner(a, astr, sizeof(astr)),
1891 lacp_format_partner(b, bstr, sizeof(bstr)));
1892
1893 return (buf);
1894 }
1895
1896 const char *
1897 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
1898 char *buf, size_t buflen)
1899 {
1900 if (la == NULL) {
1901 return ("(none)");
1902 }
1903
1904 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
1905 }
1906
1907 const char *
1908 lacp_format_state(uint8_t state, char *buf, size_t buflen)
1909 {
1910 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
1911 return (buf);
1912 }
1913
1914 static void
1915 lacp_dump_lacpdu(const struct lacpdu *du)
1916 {
1917 char buf[LACP_PARTNERSTR_MAX+1];
1918 char buf2[LACP_STATESTR_MAX+1];
1919
1920 printf("actor=%s\n",
1921 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
1922 printf("actor.state=%s\n",
1923 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
1924 printf("partner=%s\n",
1925 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
1926 printf("partner.state=%s\n",
1927 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
1928
1929 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
1930 }
1931
1932 static void
1933 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
1934 {
1935 va_list va;
1936
1937 if (lp) {
1938 printf("%s: ", lp->lp_ifp->if_xname);
1939 }
1940
1941 va_start(va, fmt);
1942 vprintf(fmt, va);
1943 va_end(va);
1944 }
1945 #endif
Cache object: ad4fb607c77f58c469342816f9afd4ba
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