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ed(1): simplify by using arc4random_buf().
[freebsd-src.git] / sys / net / ieee8023ad_lacp.c
blob4863ac98035b41edb5e788da150a7e851d0a4cab
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, CTLFLAG_RWTUN,
201 &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 &ethermulticastaddr_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, SIOCGIFMEDIA, (caddr_t)&ifmr);
465 if (error != 0)
466 return;
467
468 LACP_LOCK(lsc);
469 media = ifmr.ifm_active;
470 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
471 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
472 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
473 old_state = lp->lp_state;
474 old_key = lp->lp_key;
475
476 lp->lp_media = media;
477 /*
478 * If the port is not an active full duplex Ethernet link then it can
479 * not be aggregated.
480 */
481 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
482 ifp->if_link_state != LINK_STATE_UP) {
483 lacp_port_disable(lp);
484 } else {
485 lacp_port_enable(lp);
486 }
487 lp->lp_key = lacp_compose_key(lp);
488
489 if (old_state != lp->lp_state || old_key != lp->lp_key) {
490 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
491 lp->lp_selected = LACP_UNSELECTED;
492 }
493 LACP_UNLOCK(lsc);
494 }
495
496 static void
497 lacp_tick(void *arg)
498 {
499 struct lacp_softc *lsc = arg;
500 struct lacp_port *lp;
501
502 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
503 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
504 continue;
505
506 CURVNET_SET(lp->lp_ifp->if_vnet);
507 lacp_run_timers(lp);
508
509 lacp_select(lp);
510 lacp_sm_mux(lp);
511 lacp_sm_tx(lp);
512 lacp_sm_ptx_tx_schedule(lp);
513 CURVNET_RESTORE();
514 }
515 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
516 }
517
518 int
519 lacp_port_create(struct lagg_port *lgp)
520 {
521 struct lagg_softc *sc = lgp->lp_softc;
522 struct lacp_softc *lsc = LACP_SOFTC(sc);
523 struct lacp_port *lp;
524 struct ifnet *ifp = lgp->lp_ifp;
525 struct sockaddr_dl sdl;
526 struct ifmultiaddr *rifma = NULL;
527 int error;
528
529 boolean_t active = TRUE; /* XXX should be configurable */
530 boolean_t fast = FALSE; /* Configurable via ioctl */
531
532 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
533 sdl.sdl_alen = ETHER_ADDR_LEN;
534
535 bcopy(&ethermulticastaddr_slowprotocols,
536 LLADDR(&sdl), ETHER_ADDR_LEN);
537 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
538 if (error) {
539 printf("%s: ADDMULTI failed on %s\n", __func__,
540 lgp->lp_ifp->if_xname);
541 return (error);
542 }
543
544 lp = malloc(sizeof(struct lacp_port),
545 M_DEVBUF, M_NOWAIT|M_ZERO);
546 if (lp == NULL)
547 return (ENOMEM);
548
549 LACP_LOCK(lsc);
550 lgp->lp_psc = lp;
551 lp->lp_ifp = ifp;
552 lp->lp_lagg = lgp;
553 lp->lp_lsc = lsc;
554 lp->lp_ifma = rifma;
555
556 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
557
558 lacp_fill_actorinfo(lp, &lp->lp_actor);
559 lacp_fill_markerinfo(lp, &lp->lp_marker);
560 lp->lp_state =
561 (active ? LACP_STATE_ACTIVITY : 0) |
562 (fast ? LACP_STATE_TIMEOUT : 0);
563 lp->lp_aggregator = NULL;
564 lacp_sm_rx_set_expired(lp);
565 LACP_UNLOCK(lsc);
566 lacp_linkstate(lgp);
567
568 return (0);
569 }
570
571 void
572 lacp_port_destroy(struct lagg_port *lgp)
573 {
574 struct lacp_port *lp = LACP_PORT(lgp);
575 struct lacp_softc *lsc = lp->lp_lsc;
576 int i;
577
578 LACP_LOCK(lsc);
579 for (i = 0; i < LACP_NTIMER; i++) {
580 LACP_TIMER_DISARM(lp, i);
581 }
582
583 lacp_disable_collecting(lp);
584 lacp_disable_distributing(lp);
585 lacp_unselect(lp);
586
587 LIST_REMOVE(lp, lp_next);
588 LACP_UNLOCK(lsc);
589
590 /* The address may have already been removed by if_purgemaddrs() */
591 if (!lgp->lp_detaching)
592 if_delmulti_ifma(lp->lp_ifma);
593
594 free(lp, M_DEVBUF);
595 }
596
597 void
598 lacp_req(struct lagg_softc *sc, void *data)
599 {
600 struct lacp_opreq *req = (struct lacp_opreq *)data;
601 struct lacp_softc *lsc = LACP_SOFTC(sc);
602 struct lacp_aggregator *la;
603
604 bzero(req, sizeof(struct lacp_opreq));
605
606 /*
607 * If the LACP softc is NULL, return with the opreq structure full of
608 * zeros. It is normal for the softc to be NULL while the lagg is
609 * being destroyed.
610 */
611 if (NULL == lsc)
612 return;
613
614 la = lsc->lsc_active_aggregator;
615 LACP_LOCK(lsc);
616 if (la != NULL) {
617 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
618 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
619 ETHER_ADDR_LEN);
620 req->actor_key = ntohs(la->la_actor.lip_key);
621 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
622 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
623 req->actor_state = la->la_actor.lip_state;
624
625 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
626 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
627 ETHER_ADDR_LEN);
628 req->partner_key = ntohs(la->la_partner.lip_key);
629 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
630 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
631 req->partner_state = la->la_partner.lip_state;
632 }
633 LACP_UNLOCK(lsc);
634 }
635
636 void
637 lacp_portreq(struct lagg_port *lgp, void *data)
638 {
639 struct lacp_opreq *req = (struct lacp_opreq *)data;
640 struct lacp_port *lp = LACP_PORT(lgp);
641 struct lacp_softc *lsc = lp->lp_lsc;
642
643 LACP_LOCK(lsc);
644 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
645 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
646 ETHER_ADDR_LEN);
647 req->actor_key = ntohs(lp->lp_actor.lip_key);
648 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
649 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
650 req->actor_state = lp->lp_actor.lip_state;
651
652 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
653 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
654 ETHER_ADDR_LEN);
655 req->partner_key = ntohs(lp->lp_partner.lip_key);
656 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
657 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
658 req->partner_state = lp->lp_partner.lip_state;
659 LACP_UNLOCK(lsc);
660 }
661
662 static void
663 lacp_disable_collecting(struct lacp_port *lp)
664 {
665 LACP_DPRINTF((lp, "collecting disabled\n"));
666 lp->lp_state &= ~LACP_STATE_COLLECTING;
667 }
668
669 static void
670 lacp_enable_collecting(struct lacp_port *lp)
671 {
672 LACP_DPRINTF((lp, "collecting enabled\n"));
673 lp->lp_state |= LACP_STATE_COLLECTING;
674 }
675
676 static void
677 lacp_disable_distributing(struct lacp_port *lp)
678 {
679 struct lacp_aggregator *la = lp->lp_aggregator;
680 struct lacp_softc *lsc = lp->lp_lsc;
681 struct lagg_softc *sc = lsc->lsc_softc;
682 char buf[LACP_LAGIDSTR_MAX+1];
683
684 LACP_LOCK_ASSERT(lsc);
685
686 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
687 return;
688 }
689
690 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
691 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
692 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
693
694 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
695 "nports %d -> %d\n",
696 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
697 la->la_nports, la->la_nports - 1));
698
699 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
700 la->la_nports--;
701 sc->sc_active = la->la_nports;
702
703 if (lsc->lsc_active_aggregator == la) {
704 lacp_suppress_distributing(lsc, la);
705 lacp_select_active_aggregator(lsc);
706 /* regenerate the port map, the active aggregator has changed */
707 lacp_update_portmap(lsc);
708 }
709
710 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
711 }
712
713 static void
714 lacp_enable_distributing(struct lacp_port *lp)
715 {
716 struct lacp_aggregator *la = lp->lp_aggregator;
717 struct lacp_softc *lsc = lp->lp_lsc;
718 struct lagg_softc *sc = lsc->lsc_softc;
719 char buf[LACP_LAGIDSTR_MAX+1];
720
721 LACP_LOCK_ASSERT(lsc);
722
723 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
724 return;
725 }
726
727 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
728 "nports %d -> %d\n",
729 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
730 la->la_nports, la->la_nports + 1));
731
732 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
733 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
734 la->la_nports++;
735 sc->sc_active = la->la_nports;
736
737 lp->lp_state |= LACP_STATE_DISTRIBUTING;
738
739 if (lsc->lsc_active_aggregator == la) {
740 lacp_suppress_distributing(lsc, la);
741 lacp_update_portmap(lsc);
742 } else
743 /* try to become the active aggregator */
744 lacp_select_active_aggregator(lsc);
745 }
746
747 static void
748 lacp_transit_expire(void *vp)
749 {
750 struct lacp_softc *lsc = vp;
751
752 LACP_LOCK_ASSERT(lsc);
753
754 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
755 LACP_TRACE(NULL);
756 CURVNET_RESTORE();
757
758 lsc->lsc_suppress_distributing = FALSE;
759 }
760
761 void
762 lacp_attach(struct lagg_softc *sc)
763 {
764 struct lacp_softc *lsc;
765
766 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
767
768 sc->sc_psc = lsc;
769 lsc->lsc_softc = sc;
770
771 lsc->lsc_hashkey = m_ether_tcpip_hash_init();
772 lsc->lsc_active_aggregator = NULL;
773 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
774 LACP_LOCK_INIT(lsc);
775 TAILQ_INIT(&lsc->lsc_aggregators);
776 LIST_INIT(&lsc->lsc_ports);
777
778 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
779 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
780
781 /* if the lagg is already up then do the same */
782 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
783 lacp_init(sc);
784 }
785
786 void
787 lacp_detach(void *psc)
788 {
789 struct lacp_softc *lsc = (struct lacp_softc *)psc;
790
791 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
792 ("aggregators still active"));
793 KASSERT(lsc->lsc_active_aggregator == NULL,
794 ("aggregator still attached"));
795
796 callout_drain(&lsc->lsc_transit_callout);
797 callout_drain(&lsc->lsc_callout);
798
799 LACP_LOCK_DESTROY(lsc);
800 free(lsc, M_DEVBUF);
801 }
802
803 void
804 lacp_init(struct lagg_softc *sc)
805 {
806 struct lacp_softc *lsc = LACP_SOFTC(sc);
807
808 LACP_LOCK(lsc);
809 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
810 LACP_UNLOCK(lsc);
811 }
812
813 void
814 lacp_stop(struct lagg_softc *sc)
815 {
816 struct lacp_softc *lsc = LACP_SOFTC(sc);
817
818 LACP_LOCK(lsc);
819 callout_stop(&lsc->lsc_transit_callout);
820 callout_stop(&lsc->lsc_callout);
821 LACP_UNLOCK(lsc);
822 }
823
824 struct lagg_port *
825 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m)
826 {
827 struct lacp_softc *lsc = LACP_SOFTC(sc);
828 struct lacp_portmap *pm;
829 struct lacp_port *lp;
830 uint32_t hash;
831
832 if (__predict_false(lsc->lsc_suppress_distributing)) {
833 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
834 return (NULL);
835 }
836
837 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
838 if (pm->pm_count == 0) {
839 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
840 return (NULL);
841 }
842
843 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
844 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
845 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
846 else
847 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey);
848 hash %= pm->pm_count;
849 lp = pm->pm_map[hash];
850
851 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0,
852 ("aggregated port is not distributing"));
853
854 return (lp->lp_lagg);
855 }
856 /*
857 * lacp_suppress_distributing: drop transmit packets for a while
858 * to preserve packet ordering.
859 */
860
861 static void
862 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
863 {
864 struct lacp_port *lp;
865
866 if (lsc->lsc_active_aggregator != la) {
867 return;
868 }
869
870 LACP_TRACE(NULL);
871
872 lsc->lsc_suppress_distributing = TRUE;
873
874 /* send a marker frame down each port to verify the queues are empty */
875 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
876 lp->lp_flags |= LACP_PORT_MARK;
877 lacp_xmit_marker(lp);
878 }
879
880 /* set a timeout for the marker frames */
881 callout_reset(&lsc->lsc_transit_callout,
882 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
883 }
884
885 static int
886 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
887 const struct lacp_peerinfo *b)
888 {
889 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
890 }
891
892 static int
893 lacp_compare_systemid(const struct lacp_systemid *a,
894 const struct lacp_systemid *b)
895 {
896 return (memcmp(a, b, sizeof(*a)));
897 }
898
899 #if 0 /* unused */
900 static int
901 lacp_compare_portid(const struct lacp_portid *a,
902 const struct lacp_portid *b)
903 {
904 return (memcmp(a, b, sizeof(*a)));
905 }
906 #endif
907
908 static uint64_t
909 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
910 {
911 struct lacp_port *lp;
912 uint64_t speed;
913
914 lp = TAILQ_FIRST(&la->la_ports);
915 if (lp == NULL) {
916 return (0);
917 }
918
919 speed = ifmedia_baudrate(lp->lp_media);
920 speed *= la->la_nports;
921 if (speed == 0) {
922 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
923 lp->lp_media, la->la_nports));
924 }
925
926 return (speed);
927 }
928
929 /*
930 * lacp_select_active_aggregator: select an aggregator to be used to transmit
931 * packets from lagg(4) interface.
932 */
933
934 static void
935 lacp_select_active_aggregator(struct lacp_softc *lsc)
936 {
937 struct lacp_aggregator *la;
938 struct lacp_aggregator *best_la = NULL;
939 uint64_t best_speed = 0;
940 char buf[LACP_LAGIDSTR_MAX+1];
941
942 LACP_TRACE(NULL);
943
944 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
945 uint64_t speed;
946
947 if (la->la_nports == 0) {
948 continue;
949 }
950
951 speed = lacp_aggregator_bandwidth(la);
952 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
953 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
954 speed, la->la_nports));
955
956 /*
957 * This aggregator is chosen if the partner has a better
958 * system priority or, the total aggregated speed is higher
959 * or, it is already the chosen aggregator
960 */
961 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
962 LACP_SYS_PRI(best_la->la_partner)) ||
963 speed > best_speed ||
964 (speed == best_speed &&
965 la == lsc->lsc_active_aggregator)) {
966 best_la = la;
967 best_speed = speed;
968 }
969 }
970
971 KASSERT(best_la == NULL || best_la->la_nports > 0,
972 ("invalid aggregator refcnt"));
973 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
974 ("invalid aggregator list"));
975
976 if (lsc->lsc_active_aggregator != best_la) {
977 LACP_DPRINTF((NULL, "active aggregator changed\n"));
978 LACP_DPRINTF((NULL, "old %s\n",
979 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
980 buf, sizeof(buf))));
981 } else {
982 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
983 }
984 LACP_DPRINTF((NULL, "new %s\n",
985 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
986
987 if (lsc->lsc_active_aggregator != best_la) {
988 lsc->lsc_active_aggregator = best_la;
989 lacp_update_portmap(lsc);
990 if (best_la) {
991 lacp_suppress_distributing(lsc, best_la);
992 }
993 }
994 }
995
996 /*
997 * Updated the inactive portmap array with the new list of ports and
998 * make it live.
999 */
1000 static void
1001 lacp_update_portmap(struct lacp_softc *lsc)
1002 {
1003 struct lagg_softc *sc = lsc->lsc_softc;
1004 struct lacp_aggregator *la;
1005 struct lacp_portmap *p;
1006 struct lacp_port *lp;
1007 uint64_t speed;
1008 u_int newmap;
1009 int i;
1010
1011 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1012 p = &lsc->lsc_pmap[newmap];
1013 la = lsc->lsc_active_aggregator;
1014 speed = 0;
1015 bzero(p, sizeof(struct lacp_portmap));
1016
1017 if (la != NULL && la->la_nports > 0) {
1018 p->pm_count = la->la_nports;
1019 i = 0;
1020 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q)
1021 p->pm_map[i++] = lp;
1022 KASSERT(i == p->pm_count, ("Invalid port count"));
1023 speed = lacp_aggregator_bandwidth(la);
1024 }
1025 sc->sc_ifp->if_baudrate = speed;
1026
1027 /* switch the active portmap over */
1028 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1029 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1030 lsc->lsc_activemap,
1031 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1032 }
1033
1034 static uint16_t
1035 lacp_compose_key(struct lacp_port *lp)
1036 {
1037 struct lagg_port *lgp = lp->lp_lagg;
1038 struct lagg_softc *sc = lgp->lp_softc;
1039 u_int media = lp->lp_media;
1040 uint16_t key;
1041
1042 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1043
1044 /*
1045 * non-aggregatable links should have unique keys.
1046 *
1047 * XXX this isn't really unique as if_index is 16 bit.
1048 */
1049
1050 /* bit 0..14: (some bits of) if_index of this port */
1051 key = lp->lp_ifp->if_index;
1052 /* bit 15: 1 */
1053 key |= 0x8000;
1054 } else {
1055 u_int subtype = IFM_SUBTYPE(media);
1056
1057 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1058 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1059
1060 /* bit 0..4: IFM_SUBTYPE modulo speed */
1061 switch (subtype) {
1062 case IFM_10_T:
1063 case IFM_10_2:
1064 case IFM_10_5:
1065 case IFM_10_STP:
1066 case IFM_10_FL:
1067 key = IFM_10_T;
1068 break;
1069 case IFM_100_TX:
1070 case IFM_100_FX:
1071 case IFM_100_T4:
1072 case IFM_100_VG:
1073 case IFM_100_T2:
1074 case IFM_100_T:
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 key = IFM_10G_LR;
1099 break;
1100 case IFM_20G_KR2:
1101 key = IFM_20G_KR2;
1102 break;
1103 case IFM_2500_KX:
1104 case IFM_2500_T:
1105 key = IFM_2500_KX;
1106 break;
1107 case IFM_5000_T:
1108 key = IFM_5000_T;
1109 break;
1110 case IFM_50G_PCIE:
1111 case IFM_50G_CR2:
1112 case IFM_50G_KR2:
1113 key = IFM_50G_PCIE;
1114 break;
1115 case IFM_56G_R4:
1116 key = IFM_56G_R4;
1117 break;
1118 case IFM_25G_PCIE:
1119 case IFM_25G_CR:
1120 case IFM_25G_KR:
1121 case IFM_25G_SR:
1122 key = IFM_25G_PCIE;
1123 break;
1124 case IFM_40G_CR4:
1125 case IFM_40G_SR4:
1126 case IFM_40G_LR4:
1127 case IFM_40G_XLPPI:
1128 case IFM_40G_KR4:
1129 key = IFM_40G_CR4;
1130 break;
1131 case IFM_100G_CR4:
1132 case IFM_100G_SR4:
1133 case IFM_100G_KR4:
1134 case IFM_100G_LR4:
1135 key = IFM_100G_CR4;
1136 break;
1137 default:
1138 key = subtype;
1139 break;
1140 }
1141 /* bit 5..14: (some bits of) if_index of lagg device */
1142 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1143 /* bit 15: 0 */
1144 }
1145 return (htons(key));
1146 }
1147
1148 static void
1149 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1150 {
1151 char buf[LACP_LAGIDSTR_MAX+1];
1152
1153 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1154 __func__,
1155 lacp_format_lagid(&la->la_actor, &la->la_partner,
1156 buf, sizeof(buf)),
1157 la->la_refcnt, la->la_refcnt + 1));
1158
1159 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1160 la->la_refcnt++;
1161 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1162 }
1163
1164 static void
1165 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1166 {
1167 char buf[LACP_LAGIDSTR_MAX+1];
1168
1169 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1170 __func__,
1171 lacp_format_lagid(&la->la_actor, &la->la_partner,
1172 buf, sizeof(buf)),
1173 la->la_refcnt, la->la_refcnt - 1));
1174
1175 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1176 la->la_refcnt--;
1177 if (la->la_refcnt > 0) {
1178 return;
1179 }
1180
1181 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1182 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1183
1184 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1185
1186 free(la, M_DEVBUF);
1187 }
1188
1189 /*
1190 * lacp_aggregator_get: allocate an aggregator.
1191 */
1192
1193 static struct lacp_aggregator *
1194 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1195 {
1196 struct lacp_aggregator *la;
1197
1198 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1199 if (la) {
1200 la->la_refcnt = 1;
1201 la->la_nports = 0;
1202 TAILQ_INIT(&la->la_ports);
1203 la->la_pending = 0;
1204 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1205 }
1206
1207 return (la);
1208 }
1209
1210 /*
1211 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1212 */
1213
1214 static void
1215 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1216 {
1217 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1218 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1219
1220 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1221 }
1222
1223 static void
1224 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1225 const struct lacp_peerinfo *lpi_port)
1226 {
1227 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1228 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1229 lpi_aggr->lip_key = lpi_port->lip_key;
1230 }
1231
1232 /*
1233 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1234 */
1235
1236 static int
1237 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1238 const struct lacp_port *lp)
1239 {
1240 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1241 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1242 return (0);
1243 }
1244
1245 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1246 return (0);
1247 }
1248
1249 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1250 return (0);
1251 }
1252
1253 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1254 return (0);
1255 }
1256
1257 return (1);
1258 }
1259
1260 static int
1261 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1262 const struct lacp_peerinfo *b)
1263 {
1264 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1265 sizeof(a->lip_systemid))) {
1266 return (0);
1267 }
1268
1269 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1270 return (0);
1271 }
1272
1273 return (1);
1274 }
1275
1276 static void
1277 lacp_port_enable(struct lacp_port *lp)
1278 {
1279 lp->lp_state |= LACP_STATE_AGGREGATION;
1280 }
1281
1282 static void
1283 lacp_port_disable(struct lacp_port *lp)
1284 {
1285 lacp_set_mux(lp, LACP_MUX_DETACHED);
1286
1287 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1288 lp->lp_selected = LACP_UNSELECTED;
1289 lacp_sm_rx_record_default(lp);
1290 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1291 lp->lp_state &= ~LACP_STATE_EXPIRED;
1292 }
1293
1294 /*
1295 * lacp_select: select an aggregator. create one if necessary.
1296 */
1297 static void
1298 lacp_select(struct lacp_port *lp)
1299 {
1300 struct lacp_softc *lsc = lp->lp_lsc;
1301 struct lacp_aggregator *la;
1302 char buf[LACP_LAGIDSTR_MAX+1];
1303
1304 if (lp->lp_aggregator) {
1305 return;
1306 }
1307
1308 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1309 ("timer_wait_while still active"));
1310
1311 LACP_DPRINTF((lp, "port lagid=%s\n",
1312 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1313 buf, sizeof(buf))));
1314
1315 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1316 if (lacp_aggregator_is_compatible(la, lp)) {
1317 break;
1318 }
1319 }
1320
1321 if (la == NULL) {
1322 la = lacp_aggregator_get(lsc, lp);
1323 if (la == NULL) {
1324 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1325
1326 /*
1327 * will retry on the next tick.
1328 */
1329
1330 return;
1331 }
1332 lacp_fill_aggregator_id(la, lp);
1333 LACP_DPRINTF((lp, "aggregator created\n"));
1334 } else {
1335 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1336 if (la->la_refcnt == LACP_MAX_PORTS)
1337 return;
1338 lacp_aggregator_addref(lsc, la);
1339 }
1340
1341 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1342 lacp_format_lagid(&la->la_actor, &la->la_partner,
1343 buf, sizeof(buf))));
1344
1345 lp->lp_aggregator = la;
1346 lp->lp_selected = LACP_SELECTED;
1347 }
1348
1349 /*
1350 * lacp_unselect: finish unselect/detach process.
1351 */
1352
1353 static void
1354 lacp_unselect(struct lacp_port *lp)
1355 {
1356 struct lacp_softc *lsc = lp->lp_lsc;
1357 struct lacp_aggregator *la = lp->lp_aggregator;
1358
1359 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1360 ("timer_wait_while still active"));
1361
1362 if (la == NULL) {
1363 return;
1364 }
1365
1366 lp->lp_aggregator = NULL;
1367 lacp_aggregator_delref(lsc, la);
1368 }
1369
1370 /* mux machine */
1371
1372 static void
1373 lacp_sm_mux(struct lacp_port *lp)
1374 {
1375 struct lagg_port *lgp = lp->lp_lagg;
1376 struct lagg_softc *sc = lgp->lp_softc;
1377 enum lacp_mux_state new_state;
1378 boolean_t p_sync =
1379 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1380 boolean_t p_collecting =
1381 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1382 enum lacp_selected selected = lp->lp_selected;
1383 struct lacp_aggregator *la;
1384
1385 if (V_lacp_debug > 1)
1386 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
1387 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
1388 lp->lp_mux_state, selected, p_sync, p_collecting);
1389
1390 re_eval:
1391 la = lp->lp_aggregator;
1392 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1393 ("MUX not detached"));
1394 new_state = lp->lp_mux_state;
1395 switch (lp->lp_mux_state) {
1396 case LACP_MUX_DETACHED:
1397 if (selected != LACP_UNSELECTED) {
1398 new_state = LACP_MUX_WAITING;
1399 }
1400 break;
1401 case LACP_MUX_WAITING:
1402 KASSERT(la->la_pending > 0 ||
1403 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1404 ("timer_wait_while still active"));
1405 if (selected == LACP_SELECTED && la->la_pending == 0) {
1406 new_state = LACP_MUX_ATTACHED;
1407 } else if (selected == LACP_UNSELECTED) {
1408 new_state = LACP_MUX_DETACHED;
1409 }
1410 break;
1411 case LACP_MUX_ATTACHED:
1412 if (selected == LACP_SELECTED && p_sync) {
1413 new_state = LACP_MUX_COLLECTING;
1414 } else if (selected != LACP_SELECTED) {
1415 new_state = LACP_MUX_DETACHED;
1416 }
1417 break;
1418 case LACP_MUX_COLLECTING:
1419 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1420 new_state = LACP_MUX_DISTRIBUTING;
1421 } else if (selected != LACP_SELECTED || !p_sync) {
1422 new_state = LACP_MUX_ATTACHED;
1423 }
1424 break;
1425 case LACP_MUX_DISTRIBUTING:
1426 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1427 new_state = LACP_MUX_COLLECTING;
1428 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
1429 sc->sc_flapping++;
1430 }
1431 break;
1432 default:
1433 panic("%s: unknown state", __func__);
1434 }
1435
1436 if (lp->lp_mux_state == new_state) {
1437 return;
1438 }
1439
1440 lacp_set_mux(lp, new_state);
1441 goto re_eval;
1442 }
1443
1444 static void
1445 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1446 {
1447 struct lacp_aggregator *la = lp->lp_aggregator;
1448
1449 if (lp->lp_mux_state == new_state) {
1450 return;
1451 }
1452
1453 switch (new_state) {
1454 case LACP_MUX_DETACHED:
1455 lp->lp_state &= ~LACP_STATE_SYNC;
1456 lacp_disable_distributing(lp);
1457 lacp_disable_collecting(lp);
1458 lacp_sm_assert_ntt(lp);
1459 /* cancel timer */
1460 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1461 KASSERT(la->la_pending > 0,
1462 ("timer_wait_while not active"));
1463 la->la_pending--;
1464 }
1465 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1466 lacp_unselect(lp);
1467 break;
1468 case LACP_MUX_WAITING:
1469 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1470 LACP_AGGREGATE_WAIT_TIME);
1471 la->la_pending++;
1472 break;
1473 case LACP_MUX_ATTACHED:
1474 lp->lp_state |= LACP_STATE_SYNC;
1475 lacp_disable_collecting(lp);
1476 lacp_sm_assert_ntt(lp);
1477 break;
1478 case LACP_MUX_COLLECTING:
1479 lacp_enable_collecting(lp);
1480 lacp_disable_distributing(lp);
1481 lacp_sm_assert_ntt(lp);
1482 break;
1483 case LACP_MUX_DISTRIBUTING:
1484 lacp_enable_distributing(lp);
1485 break;
1486 default:
1487 panic("%s: unknown state", __func__);
1488 }
1489
1490 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1491
1492 lp->lp_mux_state = new_state;
1493 }
1494
1495 static void
1496 lacp_sm_mux_timer(struct lacp_port *lp)
1497 {
1498 struct lacp_aggregator *la = lp->lp_aggregator;
1499 char buf[LACP_LAGIDSTR_MAX+1];
1500
1501 KASSERT(la->la_pending > 0, ("no pending event"));
1502
1503 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1504 lacp_format_lagid(&la->la_actor, &la->la_partner,
1505 buf, sizeof(buf)),
1506 la->la_pending, la->la_pending - 1));
1507
1508 la->la_pending--;
1509 }
1510
1511 /* periodic transmit machine */
1512
1513 static void
1514 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1515 {
1516 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1517 LACP_STATE_TIMEOUT)) {
1518 return;
1519 }
1520
1521 LACP_DPRINTF((lp, "partner timeout changed\n"));
1522
1523 /*
1524 * FAST_PERIODIC -> SLOW_PERIODIC
1525 * or
1526 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1527 *
1528 * let lacp_sm_ptx_tx_schedule to update timeout.
1529 */
1530
1531 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1532
1533 /*
1534 * if timeout has been shortened, assert NTT.
1535 */
1536
1537 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1538 lacp_sm_assert_ntt(lp);
1539 }
1540 }
1541
1542 static void
1543 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1544 {
1545 int timeout;
1546
1547 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1548 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1549
1550 /*
1551 * NO_PERIODIC
1552 */
1553
1554 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1555 return;
1556 }
1557
1558 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1559 return;
1560 }
1561
1562 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1563 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1564
1565 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1566 }
1567
1568 static void
1569 lacp_sm_ptx_timer(struct lacp_port *lp)
1570 {
1571 lacp_sm_assert_ntt(lp);
1572 }
1573
1574 static void
1575 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1576 {
1577 int timeout;
1578
1579 /*
1580 * check LACP_DISABLED first
1581 */
1582
1583 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1584 return;
1585 }
1586
1587 /*
1588 * check loopback condition.
1589 */
1590
1591 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1592 &lp->lp_actor.lip_systemid)) {
1593 return;
1594 }
1595
1596 /*
1597 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1598 */
1599
1600 lacp_sm_rx_update_selected(lp, du);
1601 lacp_sm_rx_update_ntt(lp, du);
1602 lacp_sm_rx_record_pdu(lp, du);
1603
1604 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1605 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1606 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1607
1608 lp->lp_state &= ~LACP_STATE_EXPIRED;
1609
1610 /*
1611 * kick transmit machine without waiting the next tick.
1612 */
1613
1614 lacp_sm_tx(lp);
1615 }
1616
1617 static void
1618 lacp_sm_rx_set_expired(struct lacp_port *lp)
1619 {
1620 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1621 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1622 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1623 lp->lp_state |= LACP_STATE_EXPIRED;
1624 }
1625
1626 static void
1627 lacp_sm_rx_timer(struct lacp_port *lp)
1628 {
1629 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1630 /* CURRENT -> EXPIRED */
1631 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1632 lacp_sm_rx_set_expired(lp);
1633 } else {
1634 /* EXPIRED -> DEFAULTED */
1635 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1636 lacp_sm_rx_update_default_selected(lp);
1637 lacp_sm_rx_record_default(lp);
1638 lp->lp_state &= ~LACP_STATE_EXPIRED;
1639 }
1640 }
1641
1642 static void
1643 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1644 {
1645 boolean_t active;
1646 uint8_t oldpstate;
1647 char buf[LACP_STATESTR_MAX+1];
1648
1649 LACP_TRACE(lp);
1650
1651 oldpstate = lp->lp_partner.lip_state;
1652
1653 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1654 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1655 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1656
1657 lp->lp_partner = du->ldu_actor;
1658 if (active &&
1659 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1660 LACP_STATE_AGGREGATION) &&
1661 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1662 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1663 /* XXX nothing? */
1664 } else {
1665 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1666 }
1667
1668 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1669
1670 if (oldpstate != lp->lp_partner.lip_state) {
1671 LACP_DPRINTF((lp, "old pstate %s\n",
1672 lacp_format_state(oldpstate, buf, sizeof(buf))));
1673 LACP_DPRINTF((lp, "new pstate %s\n",
1674 lacp_format_state(lp->lp_partner.lip_state, buf,
1675 sizeof(buf))));
1676 }
1677
1678 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */
1679 if (lp->lp_lsc->lsc_strict_mode)
1680 lp->lp_partner.lip_state |= LACP_STATE_SYNC;
1681
1682 lacp_sm_ptx_update_timeout(lp, oldpstate);
1683 }
1684
1685 static void
1686 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1687 {
1688
1689 LACP_TRACE(lp);
1690
1691 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1692 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1693 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1694 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1695 lacp_sm_assert_ntt(lp);
1696 }
1697 }
1698
1699 static void
1700 lacp_sm_rx_record_default(struct lacp_port *lp)
1701 {
1702 uint8_t oldpstate;
1703
1704 LACP_TRACE(lp);
1705
1706 oldpstate = lp->lp_partner.lip_state;
1707 if (lp->lp_lsc->lsc_strict_mode)
1708 lp->lp_partner = lacp_partner_admin_strict;
1709 else
1710 lp->lp_partner = lacp_partner_admin_optimistic;
1711 lp->lp_state |= LACP_STATE_DEFAULTED;
1712 lacp_sm_ptx_update_timeout(lp, oldpstate);
1713 }
1714
1715 static void
1716 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1717 const struct lacp_peerinfo *info)
1718 {
1719
1720 LACP_TRACE(lp);
1721
1722 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1723 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1724 LACP_STATE_AGGREGATION)) {
1725 lp->lp_selected = LACP_UNSELECTED;
1726 /* mux machine will clean up lp->lp_aggregator */
1727 }
1728 }
1729
1730 static void
1731 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1732 {
1733
1734 LACP_TRACE(lp);
1735
1736 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1737 }
1738
1739 static void
1740 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1741 {
1742
1743 LACP_TRACE(lp);
1744
1745 if (lp->lp_lsc->lsc_strict_mode)
1746 lacp_sm_rx_update_selected_from_peerinfo(lp,
1747 &lacp_partner_admin_strict);
1748 else
1749 lacp_sm_rx_update_selected_from_peerinfo(lp,
1750 &lacp_partner_admin_optimistic);
1751 }
1752
1753 /* transmit machine */
1754
1755 static void
1756 lacp_sm_tx(struct lacp_port *lp)
1757 {
1758 int error = 0;
1759
1760 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1761 #if 1
1762 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1763 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1764 #endif
1765 ) {
1766 lp->lp_flags &= ~LACP_PORT_NTT;
1767 }
1768
1769 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1770 return;
1771 }
1772
1773 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1774 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1775 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1776 LACP_DPRINTF((lp, "rate limited pdu\n"));
1777 return;
1778 }
1779
1780 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
1781 error = lacp_xmit_lacpdu(lp);
1782 } else {
1783 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
1784 }
1785
1786 if (error == 0) {
1787 lp->lp_flags &= ~LACP_PORT_NTT;
1788 } else {
1789 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1790 error));
1791 }
1792 }
1793
1794 static void
1795 lacp_sm_assert_ntt(struct lacp_port *lp)
1796 {
1797
1798 lp->lp_flags |= LACP_PORT_NTT;
1799 }
1800
1801 static void
1802 lacp_run_timers(struct lacp_port *lp)
1803 {
1804 int i;
1805
1806 for (i = 0; i < LACP_NTIMER; i++) {
1807 KASSERT(lp->lp_timer[i] >= 0,
1808 ("invalid timer value %d", lp->lp_timer[i]));
1809 if (lp->lp_timer[i] == 0) {
1810 continue;
1811 } else if (--lp->lp_timer[i] <= 0) {
1812 if (lacp_timer_funcs[i]) {
1813 (*lacp_timer_funcs[i])(lp);
1814 }
1815 }
1816 }
1817 }
1818
1819 int
1820 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1821 {
1822 struct lacp_softc *lsc = lp->lp_lsc;
1823 struct lagg_port *lgp = lp->lp_lagg;
1824 struct lacp_port *lp2;
1825 struct markerdu *mdu;
1826 int error = 0;
1827 int pending = 0;
1828
1829 if (m->m_pkthdr.len != sizeof(*mdu)) {
1830 goto bad;
1831 }
1832
1833 if ((m->m_flags & M_MCAST) == 0) {
1834 goto bad;
1835 }
1836
1837 if (m->m_len < sizeof(*mdu)) {
1838 m = m_pullup(m, sizeof(*mdu));
1839 if (m == NULL) {
1840 return (ENOMEM);
1841 }
1842 }
1843
1844 mdu = mtod(m, struct markerdu *);
1845
1846 if (memcmp(&mdu->mdu_eh.ether_dhost,
1847 &ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
1848 goto bad;
1849 }
1850
1851 if (mdu->mdu_sph.sph_version != 1) {
1852 goto bad;
1853 }
1854
1855 switch (mdu->mdu_tlv.tlv_type) {
1856 case MARKER_TYPE_INFO:
1857 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1858 marker_info_tlv_template, TRUE)) {
1859 goto bad;
1860 }
1861 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
1862 memcpy(&mdu->mdu_eh.ether_dhost,
1863 &ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
1864 memcpy(&mdu->mdu_eh.ether_shost,
1865 lgp->lp_lladdr, ETHER_ADDR_LEN);
1866 error = lagg_enqueue(lp->lp_ifp, m);
1867 break;
1868
1869 case MARKER_TYPE_RESPONSE:
1870 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
1871 marker_response_tlv_template, TRUE)) {
1872 goto bad;
1873 }
1874 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
1875 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
1876 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
1877
1878 /* Verify that it is the last marker we sent out */
1879 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
1880 sizeof(struct lacp_markerinfo)))
1881 goto bad;
1882
1883 LACP_LOCK(lsc);
1884 lp->lp_flags &= ~LACP_PORT_MARK;
1885
1886 if (lsc->lsc_suppress_distributing) {
1887 /* Check if any ports are waiting for a response */
1888 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
1889 if (lp2->lp_flags & LACP_PORT_MARK) {
1890 pending = 1;
1891 break;
1892 }
1893 }
1894
1895 if (pending == 0) {
1896 /* All interface queues are clear */
1897 LACP_DPRINTF((NULL, "queue flush complete\n"));
1898 lsc->lsc_suppress_distributing = FALSE;
1899 }
1900 }
1901 LACP_UNLOCK(lsc);
1902 m_freem(m);
1903 break;
1904
1905 default:
1906 goto bad;
1907 }
1908
1909 return (error);
1910
1911 bad:
1912 LACP_DPRINTF((lp, "bad marker frame\n"));
1913 m_freem(m);
1914 return (EINVAL);
1915 }
1916
1917 static int
1918 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
1919 const struct tlv_template *tmpl, boolean_t check_type)
1920 {
1921 while (/* CONSTCOND */ 1) {
1922 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
1923 return (EINVAL);
1924 }
1925 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
1926 tlv->tlv_length != tmpl->tmpl_length) {
1927 return (EINVAL);
1928 }
1929 if (tmpl->tmpl_type == 0) {
1930 break;
1931 }
1932 tlv = (const struct tlvhdr *)
1933 ((const char *)tlv + tlv->tlv_length);
1934 tmpl++;
1935 }
1936
1937 return (0);
1938 }
1939
1940 /* Debugging */
1941 const char *
1942 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
1943 {
1944 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
1945 (int)mac[0],
1946 (int)mac[1],
1947 (int)mac[2],
1948 (int)mac[3],
1949 (int)mac[4],
1950 (int)mac[5]);
1951
1952 return (buf);
1953 }
1954
1955 const char *
1956 lacp_format_systemid(const struct lacp_systemid *sysid,
1957 char *buf, size_t buflen)
1958 {
1959 char macbuf[LACP_MACSTR_MAX+1];
1960
1961 snprintf(buf, buflen, "%04X,%s",
1962 ntohs(sysid->lsi_prio),
1963 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
1964
1965 return (buf);
1966 }
1967
1968 const char *
1969 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
1970 {
1971 snprintf(buf, buflen, "%04X,%04X",
1972 ntohs(portid->lpi_prio),
1973 ntohs(portid->lpi_portno));
1974
1975 return (buf);
1976 }
1977
1978 const char *
1979 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
1980 {
1981 char sysid[LACP_SYSTEMIDSTR_MAX+1];
1982 char portid[LACP_PORTIDSTR_MAX+1];
1983
1984 snprintf(buf, buflen, "(%s,%04X,%s)",
1985 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
1986 ntohs(peer->lip_key),
1987 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
1988
1989 return (buf);
1990 }
1991
1992 const char *
1993 lacp_format_lagid(const struct lacp_peerinfo *a,
1994 const struct lacp_peerinfo *b, char *buf, size_t buflen)
1995 {
1996 char astr[LACP_PARTNERSTR_MAX+1];
1997 char bstr[LACP_PARTNERSTR_MAX+1];
1998
1999 #if 0
2000 /*
2001 * there's a convention to display small numbered peer
2002 * in the left.
2003 */
2004
2005 if (lacp_compare_peerinfo(a, b) > 0) {
2006 const struct lacp_peerinfo *t;
2007
2008 t = a;
2009 a = b;
2010 b = t;
2011 }
2012 #endif
2013
2014 snprintf(buf, buflen, "[%s,%s]",
2015 lacp_format_partner(a, astr, sizeof(astr)),
2016 lacp_format_partner(b, bstr, sizeof(bstr)));
2017
2018 return (buf);
2019 }
2020
2021 const char *
2022 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
2023 char *buf, size_t buflen)
2024 {
2025 if (la == NULL) {
2026 return ("(none)");
2027 }
2028
2029 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
2030 }
2031
2032 const char *
2033 lacp_format_state(uint8_t state, char *buf, size_t buflen)
2034 {
2035 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
2036 return (buf);
2037 }
2038
2039 static void
2040 lacp_dump_lacpdu(const struct lacpdu *du)
2041 {
2042 char buf[LACP_PARTNERSTR_MAX+1];
2043 char buf2[LACP_STATESTR_MAX+1];
2044
2045 printf("actor=%s\n",
2046 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
2047 printf("actor.state=%s\n",
2048 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
2049 printf("partner=%s\n",
2050 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
2051 printf("partner.state=%s\n",
2052 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
2053
2054 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
2055 }
2056
2057 static void
2058 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
2059 {
2060 va_list va;
2061
2062 if (lp) {
2063 printf("%s: ", lp->lp_ifp->if_xname);
2064 }
2065
2066 va_start(va, fmt);
2067 vprintf(fmt, va);
2068 va_end(va);
2069 }
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