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("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/callout.h>
35 #include <sys/eventhandler.h>
36 #include <sys/mbuf.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <sys/kernel.h> /* hz */
40 #include <sys/socket.h> /* for net/if.h */
41 #include <sys/sockio.h>
42 #include <sys/sysctl.h>
43 #include <machine/stdarg.h>
44 #include <sys/lock.h>
45 #include <sys/rwlock.h>
46 #include <sys/taskqueue.h>
47
48 #include <net/if.h>
49 #include <net/if_var.h>
50 #include <net/if_dl.h>
51 #include <net/ethernet.h>
52 #include <net/if_media.h>
53 #include <net/if_types.h>
54
55 #include <net/if_lagg.h>
56 #include <net/ieee8023ad_lacp.h>
57
58 /*
59 * actor system priority and port priority.
60 * XXX should be configurable.
61 */
62
63 #define LACP_SYSTEM_PRIO 0x8000
64 #define LACP_PORT_PRIO 0x8000
65
66 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
67 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
68
69 static const struct tlv_template lacp_info_tlv_template[] = {
70 { LACP_TYPE_ACTORINFO,
71 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
72 { LACP_TYPE_PARTNERINFO,
73 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
74 { LACP_TYPE_COLLECTORINFO,
75 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
76 { 0, 0 },
77 };
78
79 static const struct tlv_template marker_info_tlv_template[] = {
80 { MARKER_TYPE_INFO,
81 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
82 { 0, 0 },
83 };
84
85 static const struct tlv_template marker_response_tlv_template[] = {
86 { MARKER_TYPE_RESPONSE,
87 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
88 { 0, 0 },
89 };
90
91 typedef void (*lacp_timer_func_t)(struct lacp_port *);
92
93 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
94 static void lacp_fill_markerinfo(struct lacp_port *,
95 struct lacp_markerinfo *);
96
97 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
98 static void lacp_suppress_distributing(struct lacp_softc *,
99 struct lacp_aggregator *);
100 static void lacp_transit_expire(void *);
101 static void lacp_update_portmap(struct lacp_softc *);
102 static void lacp_select_active_aggregator(struct lacp_softc *);
103 static uint16_t lacp_compose_key(struct lacp_port *);
104 static int tlv_check(const void *, size_t, const struct tlvhdr *,
105 const struct tlv_template *, boolean_t);
106 static void lacp_tick(void *);
107
108 static void lacp_fill_aggregator_id(struct lacp_aggregator *,
109 const struct lacp_port *);
110 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
111 const struct lacp_peerinfo *);
112 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
113 const struct lacp_port *);
114 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
115 const struct lacp_peerinfo *);
116
117 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
118 struct lacp_port *);
119 static void lacp_aggregator_addref(struct lacp_softc *,
120 struct lacp_aggregator *);
121 static void lacp_aggregator_delref(struct lacp_softc *,
122 struct lacp_aggregator *);
123
124 /* receive machine */
125
126 static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
127 static int lacp_marker_input(struct lacp_port *, struct mbuf *);
128 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
129 static void lacp_sm_rx_timer(struct lacp_port *);
130 static void lacp_sm_rx_set_expired(struct lacp_port *);
131 static void lacp_sm_rx_update_ntt(struct lacp_port *,
132 const struct lacpdu *);
133 static void lacp_sm_rx_record_pdu(struct lacp_port *,
134 const struct lacpdu *);
135 static void lacp_sm_rx_update_selected(struct lacp_port *,
136 const struct lacpdu *);
137 static void lacp_sm_rx_record_default(struct lacp_port *);
138 static void lacp_sm_rx_update_default_selected(struct lacp_port *);
139 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
140 const struct lacp_peerinfo *);
141
142 /* mux machine */
143
144 static void lacp_sm_mux(struct lacp_port *);
145 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
146 static void lacp_sm_mux_timer(struct lacp_port *);
147
148 /* periodic transmit machine */
149
150 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
151 static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
152 static void lacp_sm_ptx_timer(struct lacp_port *);
153
154 /* transmit machine */
155
156 static void lacp_sm_tx(struct lacp_port *);
157 static void lacp_sm_assert_ntt(struct lacp_port *);
158
159 static void lacp_run_timers(struct lacp_port *);
160 static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
161 const struct lacp_peerinfo *);
162 static int lacp_compare_systemid(const struct lacp_systemid *,
163 const struct lacp_systemid *);
164 static void lacp_port_enable(struct lacp_port *);
165 static void lacp_port_disable(struct lacp_port *);
166 static void lacp_select(struct lacp_port *);
167 static void lacp_unselect(struct lacp_port *);
168 static void lacp_disable_collecting(struct lacp_port *);
169 static void lacp_enable_collecting(struct lacp_port *);
170 static void lacp_disable_distributing(struct lacp_port *);
171 static void lacp_enable_distributing(struct lacp_port *);
172 static int lacp_xmit_lacpdu(struct lacp_port *);
173 static int lacp_xmit_marker(struct lacp_port *);
174
175 /* Debugging */
176
177 static void lacp_dump_lacpdu(const struct lacpdu *);
178 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
179 size_t);
180 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
181 const struct lacp_peerinfo *, char *, size_t);
182 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
183 char *, size_t);
184 static const char *lacp_format_state(uint8_t, char *, size_t);
185 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
186 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
187 size_t);
188 static const char *lacp_format_portid(const struct lacp_portid *, char *,
189 size_t);
190 static void lacp_dprintf(const struct lacp_port *, const char *, ...)
191 __attribute__((__format__(__printf__, 2, 3)));
192
193 static VNET_DEFINE(int, lacp_debug);
194 #define V_lacp_debug VNET(lacp_debug)
195 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad");
196 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
197 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
198
199 static VNET_DEFINE(int, lacp_default_strict_mode) = 1;
200 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode,
201 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(lacp_default_strict_mode), 0,
202 "LACP strict protocol compliance default");
203
204 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
205 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
206 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
207
208 /*
209 * partner administration variables.
210 * XXX should be configurable.
211 */
212
213 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
214 .lip_systemid = { .lsi_prio = 0xffff },
215 .lip_portid = { .lpi_prio = 0xffff },
216 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
217 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
218 };
219
220 static const struct lacp_peerinfo lacp_partner_admin_strict = {
221 .lip_systemid = { .lsi_prio = 0xffff },
222 .lip_portid = { .lpi_prio = 0xffff },
223 .lip_state = 0,
224 };
225
226 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
227 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
228 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
229 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
230 };
231
232 struct mbuf *
233 lacp_input(struct lagg_port *lgp, struct mbuf *m)
234 {
235 struct lacp_port *lp = LACP_PORT(lgp);
236 uint8_t subtype;
237
238 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
239 m_freem(m);
240 return (NULL);
241 }
242
243 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
244 switch (subtype) {
245 case SLOWPROTOCOLS_SUBTYPE_LACP:
246 lacp_pdu_input(lp, m);
247 return (NULL);
248
249 case SLOWPROTOCOLS_SUBTYPE_MARKER:
250 lacp_marker_input(lp, m);
251 return (NULL);
252 }
253
254 /* Not a subtype we are interested in */
255 return (m);
256 }
257
258 /*
259 * lacp_pdu_input: process lacpdu
260 */
261 static int
262 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
263 {
264 struct lacp_softc *lsc = lp->lp_lsc;
265 struct lacpdu *du;
266 int error = 0;
267
268 if (m->m_pkthdr.len != sizeof(*du)) {
269 goto bad;
270 }
271
272 if ((m->m_flags & M_MCAST) == 0) {
273 goto bad;
274 }
275
276 if (m->m_len < sizeof(*du)) {
277 m = m_pullup(m, sizeof(*du));
278 if (m == NULL) {
279 return (ENOMEM);
280 }
281 }
282
283 du = mtod(m, struct lacpdu *);
284
285 if (memcmp(&du->ldu_eh.ether_dhost,
286 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
287 goto bad;
288 }
289
290 /*
291 * ignore the version for compatibility with
292 * the future protocol revisions.
293 */
294 #if 0
295 if (du->ldu_sph.sph_version != 1) {
296 goto bad;
297 }
298 #endif
299
300 /*
301 * ignore tlv types for compatibility with
302 * the future protocol revisions.
303 */
304 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
305 lacp_info_tlv_template, FALSE)) {
306 goto bad;
307 }
308
309 if (V_lacp_debug > 0) {
310 lacp_dprintf(lp, "lacpdu receive\n");
311 lacp_dump_lacpdu(du);
312 }
313
314 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
315 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
316 goto bad;
317 }
318
319 LACP_LOCK(lsc);
320 lacp_sm_rx(lp, du);
321 LACP_UNLOCK(lsc);
322
323 m_freem(m);
324 return (error);
325
326 bad:
327 m_freem(m);
328 return (EINVAL);
329 }
330
331 static void
332 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
333 {
334 struct lagg_port *lgp = lp->lp_lagg;
335 struct lagg_softc *sc = lgp->lp_softc;
336
337 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
338 memcpy(&info->lip_systemid.lsi_mac,
339 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
340 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
341 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
342 info->lip_state = lp->lp_state;
343 }
344
345 static void
346 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
347 {
348 struct ifnet *ifp = lp->lp_ifp;
349
350 /* Fill in the port index and system id (encoded as the MAC) */
351 info->mi_rq_port = htons(ifp->if_index);
352 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
353 info->mi_rq_xid = htonl(0);
354 }
355
356 static int
357 lacp_xmit_lacpdu(struct lacp_port *lp)
358 {
359 struct lagg_port *lgp = lp->lp_lagg;
360 struct mbuf *m;
361 struct lacpdu *du;
362 int error;
363
364 LACP_LOCK_ASSERT(lp->lp_lsc);
365
366 m = m_gethdr(M_NOWAIT, MT_DATA);
367 if (m == NULL) {
368 return (ENOMEM);
369 }
370 m->m_len = m->m_pkthdr.len = sizeof(*du);
371
372 du = mtod(m, struct lacpdu *);
373 memset(du, 0, sizeof(*du));
374
375 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
376 ETHER_ADDR_LEN);
377 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
378 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
379
380 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
381 du->ldu_sph.sph_version = 1;
382
383 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
384 du->ldu_actor = lp->lp_actor;
385
386 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
387 sizeof(du->ldu_partner));
388 du->ldu_partner = lp->lp_partner;
389
390 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
391 sizeof(du->ldu_collector));
392 du->ldu_collector.lci_maxdelay = 0;
393
394 if (V_lacp_debug > 0) {
395 lacp_dprintf(lp, "lacpdu transmit\n");
396 lacp_dump_lacpdu(du);
397 }
398
399 m->m_flags |= M_MCAST;
400
401 /*
402 * XXX should use higher priority queue.
403 * otherwise network congestion can break aggregation.
404 */
405
406 error = lagg_enqueue(lp->lp_ifp, m);
407 return (error);
408 }
409
410 static int
411 lacp_xmit_marker(struct lacp_port *lp)
412 {
413 struct lagg_port *lgp = lp->lp_lagg;
414 struct mbuf *m;
415 struct markerdu *mdu;
416 int error;
417
418 LACP_LOCK_ASSERT(lp->lp_lsc);
419
420 m = m_gethdr(M_NOWAIT, MT_DATA);
421 if (m == NULL) {
422 return (ENOMEM);
423 }
424 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
425
426 mdu = mtod(m, struct markerdu *);
427 memset(mdu, 0, sizeof(*mdu));
428
429 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
430 ETHER_ADDR_LEN);
431 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
432 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
433
434 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
435 mdu->mdu_sph.sph_version = 1;
436
437 /* Bump the transaction id and copy over the marker info */
438 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
439 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
440 mdu->mdu_info = lp->lp_marker;
441
442 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
443 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
444 ntohl(mdu->mdu_info.mi_rq_xid)));
445
446 m->m_flags |= M_MCAST;
447 error = lagg_enqueue(lp->lp_ifp, m);
448 return (error);
449 }
450
451 void
452 lacp_linkstate(struct lagg_port *lgp)
453 {
454 struct lacp_port *lp = LACP_PORT(lgp);
455 struct lacp_softc *lsc = lp->lp_lsc;
456 struct ifnet *ifp = lgp->lp_ifp;
457 struct ifmediareq ifmr;
458 int error = 0;
459 u_int media;
460 uint8_t old_state;
461 uint16_t old_key;
462
463 bzero((char *)&ifmr, sizeof(ifmr));
464 error = (*ifp->if_ioctl)(ifp, SIOCGIFXMEDIA, (caddr_t)&ifmr);
465 if (error != 0) {
466 bzero((char *)&ifmr, sizeof(ifmr));
467 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
468 }
469 if (error != 0)
470 return;
471
472 LACP_LOCK(lsc);
473 media = ifmr.ifm_active;
474 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
475 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
476 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
477 old_state = lp->lp_state;
478 old_key = lp->lp_key;
479
480 lp->lp_media = media;
481 /*
482 * If the port is not an active full duplex Ethernet link then it can
483 * not be aggregated.
484 */
485 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
486 ifp->if_link_state != LINK_STATE_UP) {
487 lacp_port_disable(lp);
488 } else {
489 lacp_port_enable(lp);
490 }
491 lp->lp_key = lacp_compose_key(lp);
492
493 if (old_state != lp->lp_state || old_key != lp->lp_key) {
494 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
495 lp->lp_selected = LACP_UNSELECTED;
496 }
497 LACP_UNLOCK(lsc);
498 }
499
500 static void
501 lacp_tick(void *arg)
502 {
503 struct lacp_softc *lsc = arg;
504 struct lacp_port *lp;
505
506 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
507 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
508 continue;
509
510 CURVNET_SET(lp->lp_ifp->if_vnet);
511 lacp_run_timers(lp);
512
513 lacp_select(lp);
514 lacp_sm_mux(lp);
515 lacp_sm_tx(lp);
516 lacp_sm_ptx_tx_schedule(lp);
517 CURVNET_RESTORE();
518 }
519 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
520 }
521
522 int
523 lacp_port_create(struct lagg_port *lgp)
524 {
525 struct lagg_softc *sc = lgp->lp_softc;
526 struct lacp_softc *lsc = LACP_SOFTC(sc);
527 struct lacp_port *lp;
528 struct ifnet *ifp = lgp->lp_ifp;
529 struct sockaddr_dl sdl;
530 struct ifmultiaddr *rifma = NULL;
531 int error;
532
533 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
534 sdl.sdl_alen = ETHER_ADDR_LEN;
535
536 bcopy(ðermulticastaddr_slowprotocols,
537 LLADDR(&sdl), ETHER_ADDR_LEN);
538 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
539 if (error) {
540 printf("%s: ADDMULTI failed on %s\n", __func__,
541 lgp->lp_ifp->if_xname);
542 return (error);
543 }
544
545 lp = malloc(sizeof(struct lacp_port),
546 M_DEVBUF, M_NOWAIT|M_ZERO);
547 if (lp == NULL)
548 return (ENOMEM);
549
550 LACP_LOCK(lsc);
551 lgp->lp_psc = lp;
552 lp->lp_ifp = ifp;
553 lp->lp_lagg = lgp;
554 lp->lp_lsc = lsc;
555 lp->lp_ifma = rifma;
556
557 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
558
559 lacp_fill_actorinfo(lp, &lp->lp_actor);
560 lacp_fill_markerinfo(lp, &lp->lp_marker);
561 lp->lp_state = LACP_STATE_ACTIVITY;
562 lp->lp_aggregator = NULL;
563 lacp_sm_rx_set_expired(lp);
564 LACP_UNLOCK(lsc);
565 lacp_linkstate(lgp);
566
567 return (0);
568 }
569
570 void
571 lacp_port_destroy(struct lagg_port *lgp)
572 {
573 struct lacp_port *lp = LACP_PORT(lgp);
574 struct lacp_softc *lsc = lp->lp_lsc;
575 int i;
576
577 LACP_LOCK(lsc);
578 for (i = 0; i < LACP_NTIMER; i++) {
579 LACP_TIMER_DISARM(lp, i);
580 }
581
582 lacp_disable_collecting(lp);
583 lacp_disable_distributing(lp);
584 lacp_unselect(lp);
585
586 LIST_REMOVE(lp, lp_next);
587 LACP_UNLOCK(lsc);
588
589 /* The address may have already been removed by if_purgemaddrs() */
590 if (!lgp->lp_detaching)
591 if_delmulti_ifma(lp->lp_ifma);
592
593 free(lp, M_DEVBUF);
594 }
595
596 void
597 lacp_req(struct lagg_softc *sc, void *data)
598 {
599 struct lacp_opreq *req = (struct lacp_opreq *)data;
600 struct lacp_softc *lsc = LACP_SOFTC(sc);
601 struct lacp_aggregator *la;
602
603 bzero(req, sizeof(struct lacp_opreq));
604
605 /*
606 * If the LACP softc is NULL, return with the opreq structure full of
607 * zeros. It is normal for the softc to be NULL while the lagg is
608 * being destroyed.
609 */
610 if (NULL == lsc)
611 return;
612
613 la = lsc->lsc_active_aggregator;
614 LACP_LOCK(lsc);
615 if (la != NULL) {
616 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
617 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
618 ETHER_ADDR_LEN);
619 req->actor_key = ntohs(la->la_actor.lip_key);
620 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
621 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
622 req->actor_state = la->la_actor.lip_state;
623
624 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
625 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
626 ETHER_ADDR_LEN);
627 req->partner_key = ntohs(la->la_partner.lip_key);
628 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
629 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
630 req->partner_state = la->la_partner.lip_state;
631 }
632 LACP_UNLOCK(lsc);
633 }
634
635 void
636 lacp_portreq(struct lagg_port *lgp, void *data)
637 {
638 struct lacp_opreq *req = (struct lacp_opreq *)data;
639 struct lacp_port *lp = LACP_PORT(lgp);
640 struct lacp_softc *lsc = lp->lp_lsc;
641
642 LACP_LOCK(lsc);
643 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
644 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
645 ETHER_ADDR_LEN);
646 req->actor_key = ntohs(lp->lp_actor.lip_key);
647 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
648 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
649 req->actor_state = lp->lp_actor.lip_state;
650
651 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
652 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
653 ETHER_ADDR_LEN);
654 req->partner_key = ntohs(lp->lp_partner.lip_key);
655 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
656 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
657 req->partner_state = lp->lp_partner.lip_state;
658 LACP_UNLOCK(lsc);
659 }
660
661 static void
662 lacp_disable_collecting(struct lacp_port *lp)
663 {
664 LACP_DPRINTF((lp, "collecting disabled\n"));
665 lp->lp_state &= ~LACP_STATE_COLLECTING;
666 }
667
668 static void
669 lacp_enable_collecting(struct lacp_port *lp)
670 {
671 LACP_DPRINTF((lp, "collecting enabled\n"));
672 lp->lp_state |= LACP_STATE_COLLECTING;
673 }
674
675 static void
676 lacp_disable_distributing(struct lacp_port *lp)
677 {
678 struct lacp_aggregator *la = lp->lp_aggregator;
679 struct lacp_softc *lsc = lp->lp_lsc;
680 struct lagg_softc *sc = lsc->lsc_softc;
681 char buf[LACP_LAGIDSTR_MAX+1];
682
683 LACP_LOCK_ASSERT(lsc);
684
685 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
686 return;
687 }
688
689 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
690 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
691 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
692
693 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
694 "nports %d -> %d\n",
695 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
696 la->la_nports, la->la_nports - 1));
697
698 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
699 la->la_nports--;
700 sc->sc_active = la->la_nports;
701
702 if (lsc->lsc_active_aggregator == la) {
703 lacp_suppress_distributing(lsc, la);
704 lacp_select_active_aggregator(lsc);
705 /* regenerate the port map, the active aggregator has changed */
706 lacp_update_portmap(lsc);
707 }
708
709 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
710 }
711
712 static void
713 lacp_enable_distributing(struct lacp_port *lp)
714 {
715 struct lacp_aggregator *la = lp->lp_aggregator;
716 struct lacp_softc *lsc = lp->lp_lsc;
717 struct lagg_softc *sc = lsc->lsc_softc;
718 char buf[LACP_LAGIDSTR_MAX+1];
719
720 LACP_LOCK_ASSERT(lsc);
721
722 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
723 return;
724 }
725
726 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
727 "nports %d -> %d\n",
728 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
729 la->la_nports, la->la_nports + 1));
730
731 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
732 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
733 la->la_nports++;
734 sc->sc_active = la->la_nports;
735
736 lp->lp_state |= LACP_STATE_DISTRIBUTING;
737
738 if (lsc->lsc_active_aggregator == la) {
739 lacp_suppress_distributing(lsc, la);
740 lacp_update_portmap(lsc);
741 } else
742 /* try to become the active aggregator */
743 lacp_select_active_aggregator(lsc);
744 }
745
746 static void
747 lacp_transit_expire(void *vp)
748 {
749 struct lacp_softc *lsc = vp;
750
751 LACP_LOCK_ASSERT(lsc);
752
753 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
754 LACP_TRACE(NULL);
755 CURVNET_RESTORE();
756
757 lsc->lsc_suppress_distributing = FALSE;
758 }
759
760 void
761 lacp_attach(struct lagg_softc *sc)
762 {
763 struct lacp_softc *lsc;
764
765 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
766
767 sc->sc_psc = lsc;
768 lsc->lsc_softc = sc;
769
770 lsc->lsc_hashkey = m_ether_tcpip_hash_init();
771 lsc->lsc_active_aggregator = NULL;
772 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
773 LACP_LOCK_INIT(lsc);
774 TAILQ_INIT(&lsc->lsc_aggregators);
775 LIST_INIT(&lsc->lsc_ports);
776
777 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
778 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
779
780 /* if the lagg is already up then do the same */
781 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
782 lacp_init(sc);
783 }
784
785 void
786 lacp_detach(void *psc)
787 {
788 struct lacp_softc *lsc = (struct lacp_softc *)psc;
789
790 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
791 ("aggregators still active"));
792 KASSERT(lsc->lsc_active_aggregator == NULL,
793 ("aggregator still attached"));
794
795 callout_drain(&lsc->lsc_transit_callout);
796 callout_drain(&lsc->lsc_callout);
797
798 LACP_LOCK_DESTROY(lsc);
799 free(lsc, M_DEVBUF);
800 }
801
802 void
803 lacp_init(struct lagg_softc *sc)
804 {
805 struct lacp_softc *lsc = LACP_SOFTC(sc);
806
807 LACP_LOCK(lsc);
808 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
809 LACP_UNLOCK(lsc);
810 }
811
812 void
813 lacp_stop(struct lagg_softc *sc)
814 {
815 struct lacp_softc *lsc = LACP_SOFTC(sc);
816
817 LACP_LOCK(lsc);
818 callout_stop(&lsc->lsc_transit_callout);
819 callout_stop(&lsc->lsc_callout);
820 LACP_UNLOCK(lsc);
821 }
822
823 struct lagg_port *
824 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
825 {
826 struct lacp_softc *lsc = LACP_SOFTC(sc);
827 struct lacp_portmap *pm;
828 struct lacp_port *lp;
829 uint32_t hash;
830
831 if (__predict_false(lsc->lsc_suppress_distributing)) {
832 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
833 return (NULL);
834 }
835
836 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
837 if (pm->pm_count == 0) {
838 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
839 return (NULL);
840 }
841
842 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
843 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
844 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
845 else
846 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey);
847 hash %= pm->pm_count;
848 lp = pm->pm_map[hash];
849
850 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
851 ("aggregated port is not distributing"));
852
853 return (lp->lp_lagg);
854 }
855 /*
856 * lacp_suppress_distributing: drop transmit packets for a while
857 * to preserve packet ordering.
858 */
859
860 static void
861 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
862 {
863 struct lacp_port *lp;
864
865 if (lsc->lsc_active_aggregator != la) {
866 return;
867 }
868
869 LACP_TRACE(NULL);
870
871 lsc->lsc_suppress_distributing = TRUE;
872
873 /* send a marker frame down each port to verify the queues are empty */
874 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
875 lp->lp_flags |= LACP_PORT_MARK;
876 lacp_xmit_marker(lp);
877 }
878
879 /* set a timeout for the marker frames */
880 callout_reset(&lsc->lsc_transit_callout,
881 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
882 }
883
884 static int
885 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
886 const struct lacp_peerinfo *b)
887 {
888 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
889 }
890
891 static int
892 lacp_compare_systemid(const struct lacp_systemid *a,
893 const struct lacp_systemid *b)
894 {
895 return (memcmp(a, b, sizeof(*a)));
896 }
897
898 #if 0 /* unused */
899 static int
900 lacp_compare_portid(const struct lacp_portid *a,
901 const struct lacp_portid *b)
902 {
903 return (memcmp(a, b, sizeof(*a)));
904 }
905 #endif
906
907 static uint64_t
908 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
909 {
910 struct lacp_port *lp;
911 uint64_t speed;
912
913 lp = TAILQ_FIRST(&la->la_ports);
914 if (lp == NULL) {
915 return (0);
916 }
917
918 speed = ifmedia_baudrate(lp->lp_media);
919 speed *= la->la_nports;
920 if (speed == 0) {
921 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
922 lp->lp_media, la->la_nports));
923 }
924
925 return (speed);
926 }
927
928 /*
929 * lacp_select_active_aggregator: select an aggregator to be used to transmit
930 * packets from lagg(4) interface.
931 */
932
933 static void
934 lacp_select_active_aggregator(struct lacp_softc *lsc)
935 {
936 struct lacp_aggregator *la;
937 struct lacp_aggregator *best_la = NULL;
938 uint64_t best_speed = 0;
939 char buf[LACP_LAGIDSTR_MAX+1];
940
941 LACP_TRACE(NULL);
942
943 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
944 uint64_t speed;
945
946 if (la->la_nports == 0) {
947 continue;
948 }
949
950 speed = lacp_aggregator_bandwidth(la);
951 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
952 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
953 speed, la->la_nports));
954
955 /*
956 * This aggregator is chosen if the partner has a better
957 * system priority or, the total aggregated speed is higher
958 * or, it is already the chosen aggregator
959 */
960 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
961 LACP_SYS_PRI(best_la->la_partner)) ||
962 speed > best_speed ||
963 (speed == best_speed &&
964 la == lsc->lsc_active_aggregator)) {
965 best_la = la;
966 best_speed = speed;
967 }
968 }
969
970 KASSERT(best_la == NULL || best_la->la_nports > 0,
971 ("invalid aggregator refcnt"));
972 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
973 ("invalid aggregator list"));
974
975 if (lsc->lsc_active_aggregator != best_la) {
976 LACP_DPRINTF((NULL, "active aggregator changed\n"));
977 LACP_DPRINTF((NULL, "old %s\n",
978 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
979 buf, sizeof(buf))));
980 } else {
981 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
982 }
983 LACP_DPRINTF((NULL, "new %s\n",
984 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
985
986 if (lsc->lsc_active_aggregator != best_la) {
987 lsc->lsc_active_aggregator = best_la;
988 lacp_update_portmap(lsc);
989 if (best_la) {
990 lacp_suppress_distributing(lsc, best_la);
991 }
992 }
993 }
994
995 /*
996 * Updated the inactive portmap array with the new list of ports and
997 * make it live.
998 */
999 static void
1000 lacp_update_portmap(struct lacp_softc *lsc)
1001 {
1002 struct lagg_softc *sc = lsc->lsc_softc;
1003 struct lacp_aggregator *la;
1004 struct lacp_portmap *p;
1005 struct lacp_port *lp;
1006 uint64_t speed;
1007 u_int newmap;
1008 int i;
1009
1010 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1011 p = &lsc->lsc_pmap[newmap];
1012 la = lsc->lsc_active_aggregator;
1013 speed = 0;
1014 bzero(p, sizeof(struct lacp_portmap));
1015
1016 if (la != NULL && la->la_nports > 0) {
1017 p->pm_count = la->la_nports;
1018 i = 0;
1019 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
1020 p->pm_map[i++] = lp;
1021 KASSERT(i == p->pm_count, ("Invalid port count"));
1022 speed = lacp_aggregator_bandwidth(la);
1023 }
1024 sc->sc_ifp->if_baudrate = speed;
1025
1026 /* switch the active portmap over */
1027 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1028 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1029 lsc->lsc_activemap,
1030 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1031 }
1032
1033 static uint16_t
1034 lacp_compose_key(struct lacp_port *lp)
1035 {
1036 struct lagg_port *lgp = lp->lp_lagg;
1037 struct lagg_softc *sc = lgp->lp_softc;
1038 u_int media = lp->lp_media;
1039 uint16_t key;
1040
1041 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1042
1043 /*
1044 * non-aggregatable links should have unique keys.
1045 *
1046 * XXX this isn't really unique as if_index is 16 bit.
1047 */
1048
1049 /* bit 0..14: (some bits of) if_index of this port */
1050 key = lp->lp_ifp->if_index;
1051 /* bit 15: 1 */
1052 key |= 0x8000;
1053 } else {
1054 u_int subtype = IFM_SUBTYPE(media);
1055
1056 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1057 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1058
1059 /* bit 0..4: IFM_SUBTYPE modulo speed */
1060 switch (subtype) {
1061 case IFM_10_T:
1062 case IFM_10_2:
1063 case IFM_10_5:
1064 case IFM_10_STP:
1065 case IFM_10_FL:
1066 key = IFM_10_T;
1067 break;
1068 case IFM_100_TX:
1069 case IFM_100_FX:
1070 case IFM_100_T4:
1071 case IFM_100_VG:
1072 case IFM_100_T2:
1073 case IFM_100_T:
1074 case IFM_100_SGMII:
1075 key = IFM_100_TX;
1076 break;
1077 case IFM_1000_SX:
1078 case IFM_1000_LX:
1079 case IFM_1000_CX:
1080 case IFM_1000_T:
1081 case IFM_1000_KX:
1082 case IFM_1000_SGMII:
1083 case IFM_1000_CX_SGMII:
1084 key = IFM_1000_SX;
1085 break;
1086 case IFM_10G_LR:
1087 case IFM_10G_SR:
1088 case IFM_10G_CX4:
1089 case IFM_10G_TWINAX:
1090 case IFM_10G_TWINAX_LONG:
1091 case IFM_10G_LRM:
1092 case IFM_10G_T:
1093 case IFM_10G_KX4:
1094 case IFM_10G_KR:
1095 case IFM_10G_CR1:
1096 case IFM_10G_ER:
1097 case IFM_10G_SFI:
1098 case IFM_10G_AOC:
1099 key = IFM_10G_LR;
1100 break;
1101 case IFM_20G_KR2:
1102 key = IFM_20G_KR2;
1103 break;
1104 case IFM_2500_KX:
1105 case IFM_2500_T:
1106 case IFM_2500_X:
1107 key = IFM_2500_KX;
1108 break;
1109 case IFM_5000_T:
1110 case IFM_5000_KR:
1111 case IFM_5000_KR_S:
1112 case IFM_5000_KR1:
1113 key = IFM_5000_T;
1114 break;
1115 case IFM_50G_PCIE:
1116 case IFM_50G_CR2:
1117 case IFM_50G_KR2:
1118 case IFM_50G_SR2:
1119 case IFM_50G_LR2:
1120 case IFM_50G_LAUI2_AC:
1121 case IFM_50G_LAUI2:
1122 case IFM_50G_AUI2_AC:
1123 case IFM_50G_AUI2:
1124 case IFM_50G_CP:
1125 case IFM_50G_SR:
1126 case IFM_50G_LR:
1127 case IFM_50G_FR:
1128 case IFM_50G_KR_PAM4:
1129 case IFM_50G_AUI1_AC:
1130 case IFM_50G_AUI1:
1131 key = IFM_50G_PCIE;
1132 break;
1133 case IFM_56G_R4:
1134 key = IFM_56G_R4;
1135 break;
1136 case IFM_25G_PCIE:
1137 case IFM_25G_CR:
1138 case IFM_25G_KR:
1139 case IFM_25G_SR:
1140 case IFM_25G_LR:
1141 case IFM_25G_ACC:
1142 case IFM_25G_AOC:
1143 case IFM_25G_T:
1144 case IFM_25G_CR_S:
1145 case IFM_25G_CR1:
1146 case IFM_25G_KR_S:
1147 case IFM_25G_AUI:
1148 case IFM_25G_KR1:
1149 key = IFM_25G_PCIE;
1150 break;
1151 case IFM_40G_CR4:
1152 case IFM_40G_SR4:
1153 case IFM_40G_LR4:
1154 case IFM_40G_XLPPI:
1155 case IFM_40G_KR4:
1156 case IFM_40G_XLAUI:
1157 case IFM_40G_XLAUI_AC:
1158 case IFM_40G_ER4:
1159 key = IFM_40G_CR4;
1160 break;
1161 case IFM_100G_CR4:
1162 case IFM_100G_SR4:
1163 case IFM_100G_KR4:
1164 case IFM_100G_LR4:
1165 case IFM_100G_CAUI4_AC:
1166 case IFM_100G_CAUI4:
1167 case IFM_100G_AUI4_AC:
1168 case IFM_100G_AUI4:
1169 case IFM_100G_CR_PAM4:
1170 case IFM_100G_KR_PAM4:
1171 case IFM_100G_CP2:
1172 case IFM_100G_SR2:
1173 case IFM_100G_DR:
1174 case IFM_100G_KR2_PAM4:
1175 case IFM_100G_CAUI2_AC:
1176 case IFM_100G_CAUI2:
1177 case IFM_100G_AUI2_AC:
1178 case IFM_100G_AUI2:
1179 key = IFM_100G_CR4;
1180 break;
1181 case IFM_200G_CR4_PAM4:
1182 case IFM_200G_SR4:
1183 case IFM_200G_FR4:
1184 case IFM_200G_LR4:
1185 case IFM_200G_DR4:
1186 case IFM_200G_KR4_PAM4:
1187 case IFM_200G_AUI4_AC:
1188 case IFM_200G_AUI4:
1189 case IFM_200G_AUI8_AC:
1190 case IFM_200G_AUI8:
1191 key = IFM_200G_CR4_PAM4;
1192 break;
1193 case IFM_400G_FR8:
1194 case IFM_400G_LR8:
1195 case IFM_400G_DR4:
1196 case IFM_400G_AUI8_AC:
1197 case IFM_400G_AUI8:
1198 key = IFM_400G_FR8;
1199 break;
1200 default:
1201 key = subtype;
1202 break;
1203 }
1204 /* bit 5..14: (some bits of) if_index of lagg device */
1205 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1206 /* bit 15: 0 */
1207 }
1208 return (htons(key));
1209 }
1210
1211 static void
1212 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1213 {
1214 char buf[LACP_LAGIDSTR_MAX+1];
1215
1216 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1217 __func__,
1218 lacp_format_lagid(&la->la_actor, &la->la_partner,
1219 buf, sizeof(buf)),
1220 la->la_refcnt, la->la_refcnt + 1));
1221
1222 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1223 la->la_refcnt++;
1224 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1225 }
1226
1227 static void
1228 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1229 {
1230 char buf[LACP_LAGIDSTR_MAX+1];
1231
1232 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1233 __func__,
1234 lacp_format_lagid(&la->la_actor, &la->la_partner,
1235 buf, sizeof(buf)),
1236 la->la_refcnt, la->la_refcnt - 1));
1237
1238 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1239 la->la_refcnt--;
1240 if (la->la_refcnt > 0) {
1241 return;
1242 }
1243
1244 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1245 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1246
1247 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1248
1249 free(la, M_DEVBUF);
1250 }
1251
1252 /*
1253 * lacp_aggregator_get: allocate an aggregator.
1254 */
1255
1256 static struct lacp_aggregator *
1257 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1258 {
1259 struct lacp_aggregator *la;
1260
1261 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1262 if (la) {
1263 la->la_refcnt = 1;
1264 la->la_nports = 0;
1265 TAILQ_INIT(&la->la_ports);
1266 la->la_pending = 0;
1267 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1268 }
1269
1270 return (la);
1271 }
1272
1273 /*
1274 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1275 */
1276
1277 static void
1278 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1279 {
1280 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1281 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1282
1283 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1284 }
1285
1286 static void
1287 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1288 const struct lacp_peerinfo *lpi_port)
1289 {
1290 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1291 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1292 lpi_aggr->lip_key = lpi_port->lip_key;
1293 }
1294
1295 /*
1296 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1297 */
1298
1299 static int
1300 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1301 const struct lacp_port *lp)
1302 {
1303 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1304 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1305 return (0);
1306 }
1307
1308 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1309 return (0);
1310 }
1311
1312 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1313 return (0);
1314 }
1315
1316 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1317 return (0);
1318 }
1319
1320 return (1);
1321 }
1322
1323 static int
1324 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1325 const struct lacp_peerinfo *b)
1326 {
1327 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1328 sizeof(a->lip_systemid))) {
1329 return (0);
1330 }
1331
1332 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1333 return (0);
1334 }
1335
1336 return (1);
1337 }
1338
1339 static void
1340 lacp_port_enable(struct lacp_port *lp)
1341 {
1342 lp->lp_state |= LACP_STATE_AGGREGATION;
1343 }
1344
1345 static void
1346 lacp_port_disable(struct lacp_port *lp)
1347 {
1348 lacp_set_mux(lp, LACP_MUX_DETACHED);
1349
1350 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1351 lp->lp_selected = LACP_UNSELECTED;
1352 lacp_sm_rx_record_default(lp);
1353 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1354 lp->lp_state &= ~LACP_STATE_EXPIRED;
1355 }
1356
1357 /*
1358 * lacp_select: select an aggregator. create one if necessary.
1359 */
1360 static void
1361 lacp_select(struct lacp_port *lp)
1362 {
1363 struct lacp_softc *lsc = lp->lp_lsc;
1364 struct lacp_aggregator *la;
1365 char buf[LACP_LAGIDSTR_MAX+1];
1366
1367 if (lp->lp_aggregator) {
1368 return;
1369 }
1370
1371 /* If we haven't heard from our peer, skip this step. */
1372 if (lp->lp_state & LACP_STATE_DEFAULTED)
1373 return;
1374
1375 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1376 ("timer_wait_while still active"));
1377
1378 LACP_DPRINTF((lp, "port lagid=%s\n",
1379 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1380 buf, sizeof(buf))));
1381
1382 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1383 if (lacp_aggregator_is_compatible(la, lp)) {
1384 break;
1385 }
1386 }
1387
1388 if (la == NULL) {
1389 la = lacp_aggregator_get(lsc, lp);
1390 if (la == NULL) {
1391 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1392
1393 /*
1394 * will retry on the next tick.
1395 */
1396
1397 return;
1398 }
1399 lacp_fill_aggregator_id(la, lp);
1400 LACP_DPRINTF((lp, "aggregator created\n"));
1401 } else {
1402 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1403 if (la->la_refcnt == LACP_MAX_PORTS)
1404 return;
1405 lacp_aggregator_addref(lsc, la);
1406 }
1407
1408 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1409 lacp_format_lagid(&la->la_actor, &la->la_partner,
1410 buf, sizeof(buf))));
1411
1412 lp->lp_aggregator = la;
1413 lp->lp_selected = LACP_SELECTED;
1414 }
1415
1416 /*
1417 * lacp_unselect: finish unselect/detach process.
1418 */
1419
1420 static void
1421 lacp_unselect(struct lacp_port *lp)
1422 {
1423 struct lacp_softc *lsc = lp->lp_lsc;
1424 struct lacp_aggregator *la = lp->lp_aggregator;
1425
1426 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1427 ("timer_wait_while still active"));
1428
1429 if (la == NULL) {
1430 return;
1431 }
1432
1433 lp->lp_aggregator = NULL;
1434 lacp_aggregator_delref(lsc, la);
1435 }
1436
1437 /* mux machine */
1438
1439 static void
1440 lacp_sm_mux(struct lacp_port *lp)
1441 {
1442 struct lagg_port *lgp = lp->lp_lagg;
1443 struct lagg_softc *sc = lgp->lp_softc;
1444 enum lacp_mux_state new_state;
1445 boolean_t p_sync =
1446 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1447 boolean_t p_collecting =
1448 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1449 enum lacp_selected selected = lp->lp_selected;
1450 struct lacp_aggregator *la;
1451
1452 if (V_lacp_debug > 1)
1453 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
1454 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
1455 lp->lp_mux_state, selected, p_sync, p_collecting);
1456
1457 re_eval:
1458 la = lp->lp_aggregator;
1459 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1460 ("MUX not detached"));
1461 new_state = lp->lp_mux_state;
1462 switch (lp->lp_mux_state) {
1463 case LACP_MUX_DETACHED:
1464 if (selected != LACP_UNSELECTED) {
1465 new_state = LACP_MUX_WAITING;
1466 }
1467 break;
1468 case LACP_MUX_WAITING:
1469 KASSERT(la->la_pending > 0 ||
1470 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1471 ("timer_wait_while still active"));
1472 if (selected == LACP_SELECTED && la->la_pending == 0) {
1473 new_state = LACP_MUX_ATTACHED;
1474 } else if (selected == LACP_UNSELECTED) {
1475 new_state = LACP_MUX_DETACHED;
1476 }
1477 break;
1478 case LACP_MUX_ATTACHED:
1479 if (selected == LACP_SELECTED && p_sync) {
1480 new_state = LACP_MUX_COLLECTING;
1481 } else if (selected != LACP_SELECTED) {
1482 new_state = LACP_MUX_DETACHED;
1483 }
1484 break;
1485 case LACP_MUX_COLLECTING:
1486 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1487 new_state = LACP_MUX_DISTRIBUTING;
1488 } else if (selected != LACP_SELECTED || !p_sync) {
1489 new_state = LACP_MUX_ATTACHED;
1490 }
1491 break;
1492 case LACP_MUX_DISTRIBUTING:
1493 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1494 new_state = LACP_MUX_COLLECTING;
1495 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
1496 sc->sc_flapping++;
1497 }
1498 break;
1499 default:
1500 panic("%s: unknown state", __func__);
1501 }
1502
1503 if (lp->lp_mux_state == new_state) {
1504 return;
1505 }
1506
1507 lacp_set_mux(lp, new_state);
1508 goto re_eval;
1509 }
1510
1511 static void
1512 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1513 {
1514 struct lacp_aggregator *la = lp->lp_aggregator;
1515
1516 if (lp->lp_mux_state == new_state) {
1517 return;
1518 }
1519
1520 switch (new_state) {
1521 case LACP_MUX_DETACHED:
1522 lp->lp_state &= ~LACP_STATE_SYNC;
1523 lacp_disable_distributing(lp);
1524 lacp_disable_collecting(lp);
1525 lacp_sm_assert_ntt(lp);
1526 /* cancel timer */
1527 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1528 KASSERT(la->la_pending > 0,
1529 ("timer_wait_while not active"));
1530 la->la_pending--;
1531 }
1532 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1533 lacp_unselect(lp);
1534 break;
1535 case LACP_MUX_WAITING:
1536 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1537 LACP_AGGREGATE_WAIT_TIME);
1538 la->la_pending++;
1539 break;
1540 case LACP_MUX_ATTACHED:
1541 lp->lp_state |= LACP_STATE_SYNC;
1542 lacp_disable_collecting(lp);
1543 lacp_sm_assert_ntt(lp);
1544 break;
1545 case LACP_MUX_COLLECTING:
1546 lacp_enable_collecting(lp);
1547 lacp_disable_distributing(lp);
1548 lacp_sm_assert_ntt(lp);
1549 break;
1550 case LACP_MUX_DISTRIBUTING:
1551 lacp_enable_distributing(lp);
1552 break;
1553 default:
1554 panic("%s: unknown state", __func__);
1555 }
1556
1557 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1558
1559 lp->lp_mux_state = new_state;
1560 }
1561
1562 static void
1563 lacp_sm_mux_timer(struct lacp_port *lp)
1564 {
1565 struct lacp_aggregator *la = lp->lp_aggregator;
1566 char buf[LACP_LAGIDSTR_MAX+1];
1567
1568 KASSERT(la->la_pending > 0, ("no pending event"));
1569
1570 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1571 lacp_format_lagid(&la->la_actor, &la->la_partner,
1572 buf, sizeof(buf)),
1573 la->la_pending, la->la_pending - 1));
1574
1575 la->la_pending--;
1576 }
1577
1578 /* periodic transmit machine */
1579
1580 static void
1581 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1582 {
1583 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1584 LACP_STATE_TIMEOUT)) {
1585 return;
1586 }
1587
1588 LACP_DPRINTF((lp, "partner timeout changed\n"));
1589
1590 /*
1591 * FAST_PERIODIC -> SLOW_PERIODIC
1592 * or
1593 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1594 *
1595 * let lacp_sm_ptx_tx_schedule to update timeout.
1596 */
1597
1598 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1599
1600 /*
1601 * if timeout has been shortened, assert NTT.
1602 */
1603
1604 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1605 lacp_sm_assert_ntt(lp);
1606 }
1607 }
1608
1609 static void
1610 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1611 {
1612 int timeout;
1613
1614 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1615 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1616
1617 /*
1618 * NO_PERIODIC
1619 */
1620
1621 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1622 return;
1623 }
1624
1625 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1626 return;
1627 }
1628
1629 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1630 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1631
1632 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1633 }
1634
1635 static void
1636 lacp_sm_ptx_timer(struct lacp_port *lp)
1637 {
1638 lacp_sm_assert_ntt(lp);
1639 }
1640
1641 static void
1642 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1643 {
1644 int timeout;
1645
1646 /*
1647 * check LACP_DISABLED first
1648 */
1649
1650 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1651 return;
1652 }
1653
1654 /*
1655 * check loopback condition.
1656 */
1657
1658 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1659 &lp->lp_actor.lip_systemid)) {
1660 return;
1661 }
1662
1663 /*
1664 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1665 */
1666
1667 lacp_sm_rx_update_selected(lp, du);
1668 lacp_sm_rx_update_ntt(lp, du);
1669 lacp_sm_rx_record_pdu(lp, du);
1670
1671 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1672 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1673 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1674
1675 lp->lp_state &= ~LACP_STATE_EXPIRED;
1676
1677 /*
1678 * kick transmit machine without waiting the next tick.
1679 */
1680
1681 lacp_sm_tx(lp);
1682 }
1683
1684 static void
1685 lacp_sm_rx_set_expired(struct lacp_port *lp)
1686 {
1687 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1688 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1689 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1690 lp->lp_state |= LACP_STATE_EXPIRED;
1691 }
1692
1693 static void
1694 lacp_sm_rx_timer(struct lacp_port *lp)
1695 {
1696 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1697 /* CURRENT -> EXPIRED */
1698 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1699 lacp_sm_rx_set_expired(lp);
1700 } else {
1701 /* EXPIRED -> DEFAULTED */
1702 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1703 lacp_sm_rx_update_default_selected(lp);
1704 lacp_sm_rx_record_default(lp);
1705 lp->lp_state &= ~LACP_STATE_EXPIRED;
1706 }
1707 }
1708
1709 static void
1710 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1711 {
1712 boolean_t active;
1713 uint8_t oldpstate;
1714 char buf[LACP_STATESTR_MAX+1];
1715
1716 LACP_TRACE(lp);
1717
1718 oldpstate = lp->lp_partner.lip_state;
1719
1720 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1721 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1722 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1723
1724 lp->lp_partner = du->ldu_actor;
1725 if (active &&
1726 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1727 LACP_STATE_AGGREGATION) &&
1728 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1729 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1730 /*
1731 * XXX Maintain legacy behavior of leaving the
1732 * LACP_STATE_SYNC bit unchanged from the partner's
1733 * advertisement if lsc_strict_mode is false.
1734 * TODO: We should re-examine the concept of the "strict mode"
1735 * to ensure it makes sense to maintain a non-strict mode.
1736 */
1737 if (lp->lp_lsc->lsc_strict_mode)
1738 lp->lp_partner.lip_state |= LACP_STATE_SYNC;
1739 } else {
1740 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1741 }
1742
1743 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1744
1745 if (oldpstate != lp->lp_partner.lip_state) {
1746 LACP_DPRINTF((lp, "old pstate %s\n",
1747 lacp_format_state(oldpstate, buf, sizeof(buf))));
1748 LACP_DPRINTF((lp, "new pstate %s\n",
1749 lacp_format_state(lp->lp_partner.lip_state, buf,
1750 sizeof(buf))));
1751 }
1752
1753 lacp_sm_ptx_update_timeout(lp, oldpstate);
1754 }
1755
1756 static void
1757 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1758 {
1759
1760 LACP_TRACE(lp);
1761
1762 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1763 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1764 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1765 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1766 lacp_sm_assert_ntt(lp);
1767 }
1768 }
1769
1770 static void
1771 lacp_sm_rx_record_default(struct lacp_port *lp)
1772 {
1773 uint8_t oldpstate;
1774
1775 LACP_TRACE(lp);
1776
1777 oldpstate = lp->lp_partner.lip_state;
1778 if (lp->lp_lsc->lsc_strict_mode)
1779 lp->lp_partner = lacp_partner_admin_strict;
1780 else
1781 lp->lp_partner = lacp_partner_admin_optimistic;
1782 lp->lp_state |= LACP_STATE_DEFAULTED;
1783 lacp_sm_ptx_update_timeout(lp, oldpstate);
1784 }
1785
1786 static void
1787 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1788 const struct lacp_peerinfo *info)
1789 {
1790
1791 LACP_TRACE(lp);
1792
1793 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1794 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1795 LACP_STATE_AGGREGATION)) {
1796 lp->lp_selected = LACP_UNSELECTED;
1797 /* mux machine will clean up lp->lp_aggregator */
1798 }
1799 }
1800
1801 static void
1802 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1803 {
1804
1805 LACP_TRACE(lp);
1806
1807 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1808 }
1809
1810 static void
1811 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1812 {
1813
1814 LACP_TRACE(lp);
1815
1816 if (lp->lp_lsc->lsc_strict_mode)
1817 lacp_sm_rx_update_selected_from_peerinfo(lp,
1818 &lacp_partner_admin_strict);
1819 else
1820 lacp_sm_rx_update_selected_from_peerinfo(lp,
1821 &lacp_partner_admin_optimistic);
1822 }
1823
1824 /* transmit machine */
1825
1826 static void
1827 lacp_sm_tx(struct lacp_port *lp)
1828 {
1829 int error = 0;
1830
1831 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1832 #if 1
1833 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1834 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1835 #endif
1836 ) {
1837 lp->lp_flags &= ~LACP_PORT_NTT;
1838 }
1839
1840 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1841 return;
1842 }
1843
1844 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1845 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1846 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1847 LACP_DPRINTF((lp, "rate limited pdu\n"));
1848 return;
1849 }
1850
1851 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
1852 error = lacp_xmit_lacpdu(lp);
1853 } else {
1854 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
1855 }
1856
1857 if (error == 0) {
1858 lp->lp_flags &= ~LACP_PORT_NTT;
1859 } else {
1860 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1861 error));
1862 }
1863 }
1864
1865 static void
1866 lacp_sm_assert_ntt(struct lacp_port *lp)
1867 {
1868
1869 lp->lp_flags |= LACP_PORT_NTT;
1870 }
1871
1872 static void
1873 lacp_run_timers(struct lacp_port *lp)
1874 {
1875 int i;
1876
1877 for (i = 0; i < LACP_NTIMER; i++) {
1878 KASSERT(lp->lp_timer[i] >= 0,
1879 ("invalid timer value %d", lp->lp_timer[i]));
1880 if (lp->lp_timer[i] == 0) {
1881 continue;
1882 } else if (--lp->lp_timer[i] <= 0) {
1883 if (lacp_timer_funcs[i]) {
1884 (*lacp_timer_funcs[i])(lp);
1885 }
1886 }
1887 }
1888 }
1889
1890 int
1891 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1892 {
1893 struct lacp_softc *lsc = lp->lp_lsc;
1894 struct lagg_port *lgp = lp->lp_lagg;
1895 struct lacp_port *lp2;
1896 struct markerdu *mdu;
1897 int error = 0;
1898 int pending = 0;
1899
1900 if (m->m_pkthdr.len != sizeof(*mdu)) {
1901 goto bad;
1902 }
1903
1904 if ((m->m_flags & M_MCAST) == 0) {
1905 goto bad;
1906 }
1907
1908 if (m->m_len < sizeof(*mdu)) {
1909 m = m_pullup(m, sizeof(*mdu));
1910 if (m == NULL) {
1911 return (ENOMEM);
1912 }
1913 }
1914
1915 mdu = mtod(m, struct markerdu *);
1916
1917 if (memcmp(&mdu->mdu_eh.ether_dhost,
1918 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
1919 goto bad;
1920 }
1921
1922 if (mdu->mdu_sph.sph_version != 1) {
1923 goto bad;
1924 }
1925
1926 switch (mdu->mdu_tlv.tlv_type) {
1927 case MARKER_TYPE_INFO:
1928 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1929 marker_info_tlv_template, TRUE)) {
1930 goto bad;
1931 }
1932 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
1933 memcpy(&mdu->mdu_eh.ether_dhost,
1934 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
1935 memcpy(&mdu->mdu_eh.ether_shost,
1936 lgp->lp_lladdr, ETHER_ADDR_LEN);
1937 error = lagg_enqueue(lp->lp_ifp, m);
1938 break;
1939
1940 case MARKER_TYPE_RESPONSE:
1941 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1942 marker_response_tlv_template, TRUE)) {
1943 goto bad;
1944 }
1945 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
1946 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
1947 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
1948
1949 /* Verify that it is the last marker we sent out */
1950 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
1951 sizeof(struct lacp_markerinfo)))
1952 goto bad;
1953
1954 LACP_LOCK(lsc);
1955 lp->lp_flags &= ~LACP_PORT_MARK;
1956
1957 if (lsc->lsc_suppress_distributing) {
1958 /* Check if any ports are waiting for a response */
1959 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
1960 if (lp2->lp_flags & LACP_PORT_MARK) {
1961 pending = 1;
1962 break;
1963 }
1964 }
1965
1966 if (pending == 0) {
1967 /* All interface queues are clear */
1968 LACP_DPRINTF((NULL, "queue flush complete\n"));
1969 lsc->lsc_suppress_distributing = FALSE;
1970 }
1971 }
1972 LACP_UNLOCK(lsc);
1973 m_freem(m);
1974 break;
1975
1976 default:
1977 goto bad;
1978 }
1979
1980 return (error);
1981
1982 bad:
1983 LACP_DPRINTF((lp, "bad marker frame\n"));
1984 m_freem(m);
1985 return (EINVAL);
1986 }
1987
1988 static int
1989 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
1990 const struct tlv_template *tmpl, boolean_t check_type)
1991 {
1992 while (/* CONSTCOND */ 1) {
1993 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
1994 return (EINVAL);
1995 }
1996 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
1997 tlv->tlv_length != tmpl->tmpl_length) {
1998 return (EINVAL);
1999 }
2000 if (tmpl->tmpl_type == 0) {
2001 break;
2002 }
2003 tlv = (const struct tlvhdr *)
2004 ((const char *)tlv + tlv->tlv_length);
2005 tmpl++;
2006 }
2007
2008 return (0);
2009 }
2010
2011 /* Debugging */
2012 const char *
2013 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
2014 {
2015 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
2016 (int)mac[0],
2017 (int)mac[1],
2018 (int)mac[2],
2019 (int)mac[3],
2020 (int)mac[4],
2021 (int)mac[5]);
2022
2023 return (buf);
2024 }
2025
2026 const char *
2027 lacp_format_systemid(const struct lacp_systemid *sysid,
2028 char *buf, size_t buflen)
2029 {
2030 char macbuf[LACP_MACSTR_MAX+1];
2031
2032 snprintf(buf, buflen, "%04X,%s",
2033 ntohs(sysid->lsi_prio),
2034 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
2035
2036 return (buf);
2037 }
2038
2039 const char *
2040 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
2041 {
2042 snprintf(buf, buflen, "%04X,%04X",
2043 ntohs(portid->lpi_prio),
2044 ntohs(portid->lpi_portno));
2045
2046 return (buf);
2047 }
2048
2049 const char *
2050 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
2051 {
2052 char sysid[LACP_SYSTEMIDSTR_MAX+1];
2053 char portid[LACP_PORTIDSTR_MAX+1];
2054
2055 snprintf(buf, buflen, "(%s,%04X,%s)",
2056 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
2057 ntohs(peer->lip_key),
2058 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
2059
2060 return (buf);
2061 }
2062
2063 const char *
2064 lacp_format_lagid(const struct lacp_peerinfo *a,
2065 const struct lacp_peerinfo *b, char *buf, size_t buflen)
2066 {
2067 char astr[LACP_PARTNERSTR_MAX+1];
2068 char bstr[LACP_PARTNERSTR_MAX+1];
2069
2070 #if 0
2071 /*
2072 * there's a convention to display small numbered peer
2073 * in the left.
2074 */
2075
2076 if (lacp_compare_peerinfo(a, b) > 0) {
2077 const struct lacp_peerinfo *t;
2078
2079 t = a;
2080 a = b;
2081 b = t;
2082 }
2083 #endif
2084
2085 snprintf(buf, buflen, "[%s,%s]",
2086 lacp_format_partner(a, astr, sizeof(astr)),
2087 lacp_format_partner(b, bstr, sizeof(bstr)));
2088
2089 return (buf);
2090 }
2091
2092 const char *
2093 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
2094 char *buf, size_t buflen)
2095 {
2096 if (la == NULL) {
2097 return ("(none)");
2098 }
2099
2100 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
2101 }
2102
2103 const char *
2104 lacp_format_state(uint8_t state, char *buf, size_t buflen)
2105 {
2106 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
2107 return (buf);
2108 }
2109
2110 static void
2111 lacp_dump_lacpdu(const struct lacpdu *du)
2112 {
2113 char buf[LACP_PARTNERSTR_MAX+1];
2114 char buf2[LACP_STATESTR_MAX+1];
2115
2116 printf("actor=%s\n",
2117 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
2118 printf("actor.state=%s\n",
2119 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
2120 printf("partner=%s\n",
2121 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
2122 printf("partner.state=%s\n",
2123 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
2124
2125 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
2126 }
2127
2128 static void
2129 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
2130 {
2131 va_list va;
2132
2133 if (lp) {
2134 printf("%s: ", lp->lp_ifp->if_xname);
2135 }
2136
2137 va_start(va, fmt);
2138 vprintf(fmt, va);
2139 va_end(va);
2140 }
Cache object: 9e983488eef9159a48990d42c673c2b0
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