1 /* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5 *
6 * Copyright (c)2005 YAMAMOTO Takashi,
7 * Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include "opt_kern_tls.h"
36 #include "opt_ratelimit.h"
37
38 #include <sys/param.h>
39 #include <sys/callout.h>
40 #include <sys/eventhandler.h>
41 #include <sys/mbuf.h>
42 #include <sys/systm.h>
43 #include <sys/malloc.h>
44 #include <sys/kernel.h> /* hz */
45 #include <sys/socket.h> /* for net/if.h */
46 #include <sys/sockio.h>
47 #include <sys/sysctl.h>
48 #include <machine/stdarg.h>
49 #include <sys/lock.h>
50 #include <sys/rwlock.h>
51 #include <sys/taskqueue.h>
52 #include <sys/time.h>
53
54 #include <net/if.h>
55 #include <net/if_var.h>
56 #include <net/if_private.h>
57 #include <net/if_dl.h>
58 #include <net/ethernet.h>
59 #include <net/infiniband.h>
60 #include <net/if_media.h>
61 #include <net/if_types.h>
62
63 #include <net/if_lagg.h>
64 #include <net/ieee8023ad_lacp.h>
65
66 /*
67 * actor system priority and port priority.
68 * XXX should be configurable.
69 */
70
71 #define LACP_SYSTEM_PRIO 0x8000
72 #define LACP_PORT_PRIO 0x8000
73
74 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
75 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
76
77 static const struct tlv_template lacp_info_tlv_template[] = {
78 { LACP_TYPE_ACTORINFO,
79 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
80 { LACP_TYPE_PARTNERINFO,
81 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
82 { LACP_TYPE_COLLECTORINFO,
83 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
84 { 0, 0 },
85 };
86
87 static const struct tlv_template marker_info_tlv_template[] = {
88 { MARKER_TYPE_INFO,
89 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
90 { 0, 0 },
91 };
92
93 static const struct tlv_template marker_response_tlv_template[] = {
94 { MARKER_TYPE_RESPONSE,
95 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
96 { 0, 0 },
97 };
98
99 typedef void (*lacp_timer_func_t)(struct lacp_port *);
100
101 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
102 static void lacp_fill_markerinfo(struct lacp_port *,
103 struct lacp_markerinfo *);
104
105 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
106 static void lacp_suppress_distributing(struct lacp_softc *,
107 struct lacp_aggregator *);
108 static void lacp_transit_expire(void *);
109 static void lacp_update_portmap(struct lacp_softc *);
110 static void lacp_select_active_aggregator(struct lacp_softc *);
111 static uint16_t lacp_compose_key(struct lacp_port *);
112 static int tlv_check(const void *, size_t, const struct tlvhdr *,
113 const struct tlv_template *, boolean_t);
114 static void lacp_tick(void *);
115
116 static void lacp_fill_aggregator_id(struct lacp_aggregator *,
117 const struct lacp_port *);
118 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
119 const struct lacp_peerinfo *);
120 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *,
121 const struct lacp_port *);
122 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
123 const struct lacp_peerinfo *);
124
125 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
126 struct lacp_port *);
127 static void lacp_aggregator_addref(struct lacp_softc *,
128 struct lacp_aggregator *);
129 static void lacp_aggregator_delref(struct lacp_softc *,
130 struct lacp_aggregator *);
131
132 /* receive machine */
133
134 static int lacp_pdu_input(struct lacp_port *, struct mbuf *);
135 static int lacp_marker_input(struct lacp_port *, struct mbuf *);
136 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
137 static void lacp_sm_rx_timer(struct lacp_port *);
138 static void lacp_sm_rx_set_expired(struct lacp_port *);
139 static void lacp_sm_rx_update_ntt(struct lacp_port *,
140 const struct lacpdu *);
141 static void lacp_sm_rx_record_pdu(struct lacp_port *,
142 const struct lacpdu *);
143 static void lacp_sm_rx_update_selected(struct lacp_port *,
144 const struct lacpdu *);
145 static void lacp_sm_rx_record_default(struct lacp_port *);
146 static void lacp_sm_rx_update_default_selected(struct lacp_port *);
147 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
148 const struct lacp_peerinfo *);
149
150 /* mux machine */
151
152 static void lacp_sm_mux(struct lacp_port *);
153 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
154 static void lacp_sm_mux_timer(struct lacp_port *);
155
156 /* periodic transmit machine */
157
158 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
159 static void lacp_sm_ptx_tx_schedule(struct lacp_port *);
160 static void lacp_sm_ptx_timer(struct lacp_port *);
161
162 /* transmit machine */
163
164 static void lacp_sm_tx(struct lacp_port *);
165 static void lacp_sm_assert_ntt(struct lacp_port *);
166
167 static void lacp_run_timers(struct lacp_port *);
168 static int lacp_compare_peerinfo(const struct lacp_peerinfo *,
169 const struct lacp_peerinfo *);
170 static int lacp_compare_systemid(const struct lacp_systemid *,
171 const struct lacp_systemid *);
172 static void lacp_port_enable(struct lacp_port *);
173 static void lacp_port_disable(struct lacp_port *);
174 static void lacp_select(struct lacp_port *);
175 static void lacp_unselect(struct lacp_port *);
176 static void lacp_disable_collecting(struct lacp_port *);
177 static void lacp_enable_collecting(struct lacp_port *);
178 static void lacp_disable_distributing(struct lacp_port *);
179 static void lacp_enable_distributing(struct lacp_port *);
180 static int lacp_xmit_lacpdu(struct lacp_port *);
181 static int lacp_xmit_marker(struct lacp_port *);
182
183 /* Debugging */
184
185 static void lacp_dump_lacpdu(const struct lacpdu *);
186 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
187 size_t);
188 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
189 const struct lacp_peerinfo *, char *, size_t);
190 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
191 char *, size_t);
192 static const char *lacp_format_state(uint8_t, char *, size_t);
193 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
194 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
195 size_t);
196 static const char *lacp_format_portid(const struct lacp_portid *, char *,
197 size_t);
198 static void lacp_dprintf(const struct lacp_port *, const char *, ...)
199 __attribute__((__format__(__printf__, 2, 3)));
200
201 VNET_DEFINE_STATIC(int, lacp_debug);
202 #define V_lacp_debug VNET(lacp_debug)
203 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
204 "ieee802.3ad");
205 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
206 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
207
208 VNET_DEFINE_STATIC(int, lacp_default_strict_mode) = 1;
209 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode,
210 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(lacp_default_strict_mode), 0,
211 "LACP strict protocol compliance default");
212 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
213 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
214 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
215
216 /*
217 * partner administration variables.
218 * XXX should be configurable.
219 */
220
221 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
222 .lip_systemid = { .lsi_prio = 0xffff },
223 .lip_portid = { .lpi_prio = 0xffff },
224 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
225 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
226 };
227
228 static const struct lacp_peerinfo lacp_partner_admin_strict = {
229 .lip_systemid = { .lsi_prio = 0xffff },
230 .lip_portid = { .lpi_prio = 0xffff },
231 .lip_state = 0,
232 };
233
234 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
235 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
236 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
237 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
238 };
239
240 struct mbuf *
241 lacp_input(struct lagg_port *lgp, struct mbuf *m)
242 {
243 struct lacp_port *lp = LACP_PORT(lgp);
244 uint8_t subtype;
245
246 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
247 m_freem(m);
248 return (NULL);
249 }
250
251 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
252 switch (subtype) {
253 case SLOWPROTOCOLS_SUBTYPE_LACP:
254 lacp_pdu_input(lp, m);
255 return (NULL);
256
257 case SLOWPROTOCOLS_SUBTYPE_MARKER:
258 lacp_marker_input(lp, m);
259 return (NULL);
260 }
261
262 /* Not a subtype we are interested in */
263 return (m);
264 }
265
266 /*
267 * lacp_pdu_input: process lacpdu
268 */
269 static int
270 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
271 {
272 struct lacp_softc *lsc = lp->lp_lsc;
273 struct lacpdu *du;
274 int error = 0;
275
276 if (m->m_pkthdr.len != sizeof(*du)) {
277 goto bad;
278 }
279
280 if ((m->m_flags & M_MCAST) == 0) {
281 goto bad;
282 }
283
284 if (m->m_len < sizeof(*du)) {
285 m = m_pullup(m, sizeof(*du));
286 if (m == NULL) {
287 return (ENOMEM);
288 }
289 }
290
291 du = mtod(m, struct lacpdu *);
292
293 if (memcmp(&du->ldu_eh.ether_dhost,
294 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
295 goto bad;
296 }
297
298 /*
299 * ignore the version for compatibility with
300 * the future protocol revisions.
301 */
302 #if 0
303 if (du->ldu_sph.sph_version != 1) {
304 goto bad;
305 }
306 #endif
307
308 /*
309 * ignore tlv types for compatibility with
310 * the future protocol revisions.
311 */
312 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
313 lacp_info_tlv_template, FALSE)) {
314 goto bad;
315 }
316
317 if (V_lacp_debug > 0) {
318 lacp_dprintf(lp, "lacpdu receive\n");
319 lacp_dump_lacpdu(du);
320 }
321
322 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
323 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
324 goto bad;
325 }
326
327 LACP_LOCK(lsc);
328 lacp_sm_rx(lp, du);
329 LACP_UNLOCK(lsc);
330
331 m_freem(m);
332 return (error);
333
334 bad:
335 m_freem(m);
336 return (EINVAL);
337 }
338
339 static void
340 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
341 {
342 struct lagg_port *lgp = lp->lp_lagg;
343 struct lagg_softc *sc = lgp->lp_softc;
344
345 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
346 memcpy(&info->lip_systemid.lsi_mac,
347 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
348 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
349 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
350 info->lip_state = lp->lp_state;
351 }
352
353 static void
354 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
355 {
356 struct ifnet *ifp = lp->lp_ifp;
357
358 /* Fill in the port index and system id (encoded as the MAC) */
359 info->mi_rq_port = htons(ifp->if_index);
360 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
361 info->mi_rq_xid = htonl(0);
362 }
363
364 static int
365 lacp_xmit_lacpdu(struct lacp_port *lp)
366 {
367 struct lagg_port *lgp = lp->lp_lagg;
368 struct mbuf *m;
369 struct lacpdu *du;
370 int error;
371
372 LACP_LOCK_ASSERT(lp->lp_lsc);
373
374 m = m_gethdr(M_NOWAIT, MT_DATA);
375 if (m == NULL) {
376 return (ENOMEM);
377 }
378 m->m_len = m->m_pkthdr.len = sizeof(*du);
379
380 du = mtod(m, struct lacpdu *);
381 memset(du, 0, sizeof(*du));
382
383 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
384 ETHER_ADDR_LEN);
385 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
386 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
387
388 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
389 du->ldu_sph.sph_version = 1;
390
391 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
392 du->ldu_actor = lp->lp_actor;
393
394 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
395 sizeof(du->ldu_partner));
396 du->ldu_partner = lp->lp_partner;
397
398 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
399 sizeof(du->ldu_collector));
400 du->ldu_collector.lci_maxdelay = 0;
401
402 if (V_lacp_debug > 0) {
403 lacp_dprintf(lp, "lacpdu transmit\n");
404 lacp_dump_lacpdu(du);
405 }
406
407 m->m_flags |= M_MCAST;
408
409 /*
410 * XXX should use higher priority queue.
411 * otherwise network congestion can break aggregation.
412 */
413
414 error = lagg_enqueue(lp->lp_ifp, m);
415 return (error);
416 }
417
418 static int
419 lacp_xmit_marker(struct lacp_port *lp)
420 {
421 struct lagg_port *lgp = lp->lp_lagg;
422 struct mbuf *m;
423 struct markerdu *mdu;
424 int error;
425
426 LACP_LOCK_ASSERT(lp->lp_lsc);
427
428 m = m_gethdr(M_NOWAIT, MT_DATA);
429 if (m == NULL) {
430 return (ENOMEM);
431 }
432 m->m_len = m->m_pkthdr.len = sizeof(*mdu);
433
434 mdu = mtod(m, struct markerdu *);
435 memset(mdu, 0, sizeof(*mdu));
436
437 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
438 ETHER_ADDR_LEN);
439 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
440 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
441
442 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
443 mdu->mdu_sph.sph_version = 1;
444
445 /* Bump the transaction id and copy over the marker info */
446 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
447 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
448 mdu->mdu_info = lp->lp_marker;
449
450 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
451 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
452 ntohl(mdu->mdu_info.mi_rq_xid)));
453
454 m->m_flags |= M_MCAST;
455 error = lagg_enqueue(lp->lp_ifp, m);
456 return (error);
457 }
458
459 void
460 lacp_linkstate(struct lagg_port *lgp)
461 {
462 struct lacp_port *lp = LACP_PORT(lgp);
463 struct lacp_softc *lsc = lp->lp_lsc;
464 struct ifnet *ifp = lgp->lp_ifp;
465 struct ifmediareq ifmr;
466 int error = 0;
467 u_int media;
468 uint8_t old_state;
469 uint16_t old_key;
470
471 bzero((char *)&ifmr, sizeof(ifmr));
472 error = (*ifp->if_ioctl)(ifp, SIOCGIFXMEDIA, (caddr_t)&ifmr);
473 if (error != 0) {
474 bzero((char *)&ifmr, sizeof(ifmr));
475 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
476 }
477 if (error != 0)
478 return;
479
480 LACP_LOCK(lsc);
481 media = ifmr.ifm_active;
482 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
483 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
484 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
485 old_state = lp->lp_state;
486 old_key = lp->lp_key;
487
488 lp->lp_media = media;
489 /*
490 * If the port is not an active full duplex Ethernet link then it can
491 * not be aggregated.
492 */
493 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
494 ifp->if_link_state != LINK_STATE_UP) {
495 lacp_port_disable(lp);
496 } else {
497 lacp_port_enable(lp);
498 }
499 lp->lp_key = lacp_compose_key(lp);
500
501 if (old_state != lp->lp_state || old_key != lp->lp_key) {
502 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
503 lp->lp_selected = LACP_UNSELECTED;
504 }
505 LACP_UNLOCK(lsc);
506 }
507
508 static void
509 lacp_tick(void *arg)
510 {
511 struct lacp_softc *lsc = arg;
512 struct lacp_port *lp;
513
514 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
515 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
516 continue;
517
518 CURVNET_SET(lp->lp_ifp->if_vnet);
519 lacp_run_timers(lp);
520
521 lacp_select(lp);
522 lacp_sm_mux(lp);
523 lacp_sm_tx(lp);
524 lacp_sm_ptx_tx_schedule(lp);
525 CURVNET_RESTORE();
526 }
527 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
528 }
529
530 int
531 lacp_port_create(struct lagg_port *lgp)
532 {
533 struct lagg_softc *sc = lgp->lp_softc;
534 struct lacp_softc *lsc = LACP_SOFTC(sc);
535 struct lacp_port *lp;
536 struct ifnet *ifp = lgp->lp_ifp;
537 struct sockaddr_dl sdl;
538 struct ifmultiaddr *rifma = NULL;
539 int error;
540
541 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
542 sdl.sdl_alen = ETHER_ADDR_LEN;
543
544 bcopy(ðermulticastaddr_slowprotocols,
545 LLADDR(&sdl), ETHER_ADDR_LEN);
546 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
547 if (error) {
548 printf("%s: ADDMULTI failed on %s\n", __func__,
549 lgp->lp_ifp->if_xname);
550 return (error);
551 }
552
553 lp = malloc(sizeof(struct lacp_port),
554 M_DEVBUF, M_NOWAIT|M_ZERO);
555 if (lp == NULL)
556 return (ENOMEM);
557
558 LACP_LOCK(lsc);
559 lgp->lp_psc = lp;
560 lp->lp_ifp = ifp;
561 lp->lp_lagg = lgp;
562 lp->lp_lsc = lsc;
563 lp->lp_ifma = rifma;
564
565 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
566
567 lacp_fill_actorinfo(lp, &lp->lp_actor);
568 lacp_fill_markerinfo(lp, &lp->lp_marker);
569 lp->lp_state = LACP_STATE_ACTIVITY;
570 lp->lp_aggregator = NULL;
571 lacp_sm_rx_set_expired(lp);
572 LACP_UNLOCK(lsc);
573 lacp_linkstate(lgp);
574
575 return (0);
576 }
577
578 void
579 lacp_port_destroy(struct lagg_port *lgp)
580 {
581 struct lacp_port *lp = LACP_PORT(lgp);
582 struct lacp_softc *lsc = lp->lp_lsc;
583 int i;
584
585 LACP_LOCK(lsc);
586 for (i = 0; i < LACP_NTIMER; i++) {
587 LACP_TIMER_DISARM(lp, i);
588 }
589
590 lacp_disable_collecting(lp);
591 lacp_disable_distributing(lp);
592 lacp_unselect(lp);
593
594 LIST_REMOVE(lp, lp_next);
595 LACP_UNLOCK(lsc);
596
597 /* The address may have already been removed by if_purgemaddrs() */
598 if (!lgp->lp_detaching)
599 if_delmulti_ifma(lp->lp_ifma);
600
601 free(lp, M_DEVBUF);
602 }
603
604 void
605 lacp_req(struct lagg_softc *sc, void *data)
606 {
607 struct lacp_opreq *req = (struct lacp_opreq *)data;
608 struct lacp_softc *lsc = LACP_SOFTC(sc);
609 struct lacp_aggregator *la;
610
611 bzero(req, sizeof(struct lacp_opreq));
612
613 /*
614 * If the LACP softc is NULL, return with the opreq structure full of
615 * zeros. It is normal for the softc to be NULL while the lagg is
616 * being destroyed.
617 */
618 if (NULL == lsc)
619 return;
620
621 la = lsc->lsc_active_aggregator;
622 LACP_LOCK(lsc);
623 if (la != NULL) {
624 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
625 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
626 ETHER_ADDR_LEN);
627 req->actor_key = ntohs(la->la_actor.lip_key);
628 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
629 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
630 req->actor_state = la->la_actor.lip_state;
631
632 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
633 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
634 ETHER_ADDR_LEN);
635 req->partner_key = ntohs(la->la_partner.lip_key);
636 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
637 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
638 req->partner_state = la->la_partner.lip_state;
639 }
640 LACP_UNLOCK(lsc);
641 }
642
643 void
644 lacp_portreq(struct lagg_port *lgp, void *data)
645 {
646 struct lacp_opreq *req = (struct lacp_opreq *)data;
647 struct lacp_port *lp = LACP_PORT(lgp);
648 struct lacp_softc *lsc = lp->lp_lsc;
649
650 LACP_LOCK(lsc);
651 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
652 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
653 ETHER_ADDR_LEN);
654 req->actor_key = ntohs(lp->lp_actor.lip_key);
655 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
656 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
657 req->actor_state = lp->lp_actor.lip_state;
658
659 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
660 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
661 ETHER_ADDR_LEN);
662 req->partner_key = ntohs(lp->lp_partner.lip_key);
663 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
664 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
665 req->partner_state = lp->lp_partner.lip_state;
666 LACP_UNLOCK(lsc);
667 }
668
669 static void
670 lacp_disable_collecting(struct lacp_port *lp)
671 {
672 LACP_DPRINTF((lp, "collecting disabled\n"));
673 lp->lp_state &= ~LACP_STATE_COLLECTING;
674 }
675
676 static void
677 lacp_enable_collecting(struct lacp_port *lp)
678 {
679 LACP_DPRINTF((lp, "collecting enabled\n"));
680 lp->lp_state |= LACP_STATE_COLLECTING;
681 }
682
683 static void
684 lacp_disable_distributing(struct lacp_port *lp)
685 {
686 struct lacp_aggregator *la = lp->lp_aggregator;
687 struct lacp_softc *lsc = lp->lp_lsc;
688 struct lagg_softc *sc = lsc->lsc_softc;
689 char buf[LACP_LAGIDSTR_MAX+1];
690
691 LACP_LOCK_ASSERT(lsc);
692
693 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
694 return;
695 }
696
697 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
698 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
699 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
700
701 LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
702 "nports %d -> %d\n",
703 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
704 la->la_nports, la->la_nports - 1));
705
706 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
707 la->la_nports--;
708 sc->sc_active = la->la_nports;
709
710 if (lsc->lsc_active_aggregator == la) {
711 lacp_suppress_distributing(lsc, la);
712 lacp_select_active_aggregator(lsc);
713 /* regenerate the port map, the active aggregator has changed */
714 lacp_update_portmap(lsc);
715 }
716
717 lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
718 if_link_state_change(sc->sc_ifp,
719 sc->sc_active ? LINK_STATE_UP : LINK_STATE_DOWN);
720 }
721
722 static void
723 lacp_enable_distributing(struct lacp_port *lp)
724 {
725 struct lacp_aggregator *la = lp->lp_aggregator;
726 struct lacp_softc *lsc = lp->lp_lsc;
727 struct lagg_softc *sc = lsc->lsc_softc;
728 char buf[LACP_LAGIDSTR_MAX+1];
729
730 LACP_LOCK_ASSERT(lsc);
731
732 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
733 return;
734 }
735
736 LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
737 "nports %d -> %d\n",
738 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
739 la->la_nports, la->la_nports + 1));
740
741 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
742 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
743 la->la_nports++;
744 sc->sc_active = la->la_nports;
745
746 lp->lp_state |= LACP_STATE_DISTRIBUTING;
747
748 if (lsc->lsc_active_aggregator == la) {
749 lacp_suppress_distributing(lsc, la);
750 lacp_update_portmap(lsc);
751 } else
752 /* try to become the active aggregator */
753 lacp_select_active_aggregator(lsc);
754
755 if_link_state_change(sc->sc_ifp,
756 sc->sc_active ? LINK_STATE_UP : LINK_STATE_DOWN);
757 }
758
759 static void
760 lacp_transit_expire(void *vp)
761 {
762 struct lacp_softc *lsc = vp;
763
764 LACP_LOCK_ASSERT(lsc);
765
766 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
767 LACP_TRACE(NULL);
768 CURVNET_RESTORE();
769
770 lsc->lsc_suppress_distributing = FALSE;
771 }
772
773 void
774 lacp_attach(struct lagg_softc *sc)
775 {
776 struct lacp_softc *lsc;
777
778 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
779
780 sc->sc_psc = lsc;
781 lsc->lsc_softc = sc;
782
783 lsc->lsc_hashkey = m_ether_tcpip_hash_init();
784 lsc->lsc_active_aggregator = NULL;
785 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
786 LACP_LOCK_INIT(lsc);
787 TAILQ_INIT(&lsc->lsc_aggregators);
788 LIST_INIT(&lsc->lsc_ports);
789
790 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
791 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
792
793 /* if the lagg is already up then do the same */
794 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
795 lacp_init(sc);
796 }
797
798 void
799 lacp_detach(void *psc)
800 {
801 struct lacp_softc *lsc = (struct lacp_softc *)psc;
802
803 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
804 ("aggregators still active"));
805 KASSERT(lsc->lsc_active_aggregator == NULL,
806 ("aggregator still attached"));
807
808 callout_drain(&lsc->lsc_transit_callout);
809 callout_drain(&lsc->lsc_callout);
810
811 LACP_LOCK_DESTROY(lsc);
812 free(lsc, M_DEVBUF);
813 }
814
815 void
816 lacp_init(struct lagg_softc *sc)
817 {
818 struct lacp_softc *lsc = LACP_SOFTC(sc);
819
820 LACP_LOCK(lsc);
821 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
822 LACP_UNLOCK(lsc);
823 }
824
825 void
826 lacp_stop(struct lagg_softc *sc)
827 {
828 struct lacp_softc *lsc = LACP_SOFTC(sc);
829
830 LACP_LOCK(lsc);
831 callout_stop(&lsc->lsc_transit_callout);
832 callout_stop(&lsc->lsc_callout);
833 LACP_UNLOCK(lsc);
834 }
835
836 struct lagg_port *
837 lacp_select_tx_port_by_hash(struct lagg_softc *sc, uint32_t hash,
838 uint8_t numa_domain, int *err)
839 {
840 struct lacp_softc *lsc = LACP_SOFTC(sc);
841 struct lacp_portmap *pm;
842 struct lacp_port *lp;
843 struct lacp_port **map;
844 int count;
845
846 if (__predict_false(lsc->lsc_suppress_distributing)) {
847 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
848 *err = ENOBUFS;
849 return (NULL);
850 }
851
852 pm = &lsc->lsc_pmap[lsc->lsc_activemap];
853 if (pm->pm_count == 0) {
854 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
855 *err = ENETDOWN;
856 return (NULL);
857 }
858
859 #ifdef NUMA
860 if ((sc->sc_opts & LAGG_OPT_USE_NUMA) &&
861 pm->pm_num_dom > 1 && numa_domain < MAXMEMDOM) {
862 count = pm->pm_numa[numa_domain].count;
863 if (count > 0) {
864 map = pm->pm_numa[numa_domain].map;
865 } else {
866 /* No ports on this domain; use global hash. */
867 map = pm->pm_map;
868 count = pm->pm_count;
869 }
870 } else
871 #endif
872 {
873 map = pm->pm_map;
874 count = pm->pm_count;
875 }
876
877 hash %= count;
878 lp = map[hash];
879
880 return (lp->lp_lagg);
881 }
882
883 struct lagg_port *
884 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m, int *err)
885 {
886 struct lacp_softc *lsc = LACP_SOFTC(sc);
887 uint32_t hash;
888 uint8_t numa_domain;
889
890 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
891 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
892 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
893 else
894 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey);
895
896 numa_domain = m->m_pkthdr.numa_domain;
897 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, err));
898 }
899
900 /*
901 * lacp_suppress_distributing: drop transmit packets for a while
902 * to preserve packet ordering.
903 */
904
905 static void
906 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
907 {
908 struct lacp_port *lp;
909
910 if (lsc->lsc_active_aggregator != la) {
911 return;
912 }
913
914 LACP_TRACE(NULL);
915
916 lsc->lsc_suppress_distributing = TRUE;
917
918 /* send a marker frame down each port to verify the queues are empty */
919 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
920 lp->lp_flags |= LACP_PORT_MARK;
921 if (lacp_xmit_marker(lp) != 0)
922 lp->lp_flags &= ~LACP_PORT_MARK;
923 }
924
925 /* set a timeout for the marker frames */
926 callout_reset(&lsc->lsc_transit_callout,
927 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
928 }
929
930 static int
931 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
932 const struct lacp_peerinfo *b)
933 {
934 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
935 }
936
937 static int
938 lacp_compare_systemid(const struct lacp_systemid *a,
939 const struct lacp_systemid *b)
940 {
941 return (memcmp(a, b, sizeof(*a)));
942 }
943
944 #if 0 /* unused */
945 static int
946 lacp_compare_portid(const struct lacp_portid *a,
947 const struct lacp_portid *b)
948 {
949 return (memcmp(a, b, sizeof(*a)));
950 }
951 #endif
952
953 static uint64_t
954 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
955 {
956 struct lacp_port *lp;
957 uint64_t speed;
958
959 lp = TAILQ_FIRST(&la->la_ports);
960 if (lp == NULL) {
961 return (0);
962 }
963
964 speed = ifmedia_baudrate(lp->lp_media);
965 speed *= la->la_nports;
966 if (speed == 0) {
967 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
968 lp->lp_media, la->la_nports));
969 }
970
971 return (speed);
972 }
973
974 /*
975 * lacp_select_active_aggregator: select an aggregator to be used to transmit
976 * packets from lagg(4) interface.
977 */
978
979 static void
980 lacp_select_active_aggregator(struct lacp_softc *lsc)
981 {
982 struct lacp_aggregator *la;
983 struct lacp_aggregator *best_la = NULL;
984 uint64_t best_speed = 0;
985 char buf[LACP_LAGIDSTR_MAX+1];
986
987 LACP_TRACE(NULL);
988
989 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
990 uint64_t speed;
991
992 if (la->la_nports == 0) {
993 continue;
994 }
995
996 speed = lacp_aggregator_bandwidth(la);
997 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
998 lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
999 speed, la->la_nports));
1000
1001 /*
1002 * This aggregator is chosen if the partner has a better
1003 * system priority or, the total aggregated speed is higher
1004 * or, it is already the chosen aggregator
1005 */
1006 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
1007 LACP_SYS_PRI(best_la->la_partner)) ||
1008 speed > best_speed ||
1009 (speed == best_speed &&
1010 la == lsc->lsc_active_aggregator)) {
1011 best_la = la;
1012 best_speed = speed;
1013 }
1014 }
1015
1016 KASSERT(best_la == NULL || best_la->la_nports > 0,
1017 ("invalid aggregator refcnt"));
1018 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
1019 ("invalid aggregator list"));
1020
1021 if (lsc->lsc_active_aggregator != best_la) {
1022 LACP_DPRINTF((NULL, "active aggregator changed\n"));
1023 LACP_DPRINTF((NULL, "old %s\n",
1024 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
1025 buf, sizeof(buf))));
1026 } else {
1027 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
1028 }
1029 LACP_DPRINTF((NULL, "new %s\n",
1030 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
1031
1032 if (lsc->lsc_active_aggregator != best_la) {
1033 lsc->lsc_active_aggregator = best_la;
1034 lacp_update_portmap(lsc);
1035 if (best_la) {
1036 lacp_suppress_distributing(lsc, best_la);
1037 }
1038 }
1039 }
1040
1041 /*
1042 * Updated the inactive portmap array with the new list of ports and
1043 * make it live.
1044 */
1045 static void
1046 lacp_update_portmap(struct lacp_softc *lsc)
1047 {
1048 struct lagg_softc *sc = lsc->lsc_softc;
1049 struct lacp_aggregator *la;
1050 struct lacp_portmap *p;
1051 struct lacp_port *lp;
1052 uint64_t speed;
1053 u_int newmap;
1054 int i;
1055 #ifdef NUMA
1056 int count;
1057 uint8_t domain;
1058 #endif
1059
1060 newmap = lsc->lsc_activemap == 0 ? 1 : 0;
1061 p = &lsc->lsc_pmap[newmap];
1062 la = lsc->lsc_active_aggregator;
1063 speed = 0;
1064 bzero(p, sizeof(struct lacp_portmap));
1065
1066 if (la != NULL && la->la_nports > 0) {
1067 p->pm_count = la->la_nports;
1068 i = 0;
1069 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) {
1070 p->pm_map[i++] = lp;
1071 #ifdef NUMA
1072 domain = lp->lp_ifp->if_numa_domain;
1073 if (domain >= MAXMEMDOM)
1074 continue;
1075 count = p->pm_numa[domain].count;
1076 p->pm_numa[domain].map[count] = lp;
1077 p->pm_numa[domain].count++;
1078 #endif
1079 }
1080 KASSERT(i == p->pm_count, ("Invalid port count"));
1081
1082 #ifdef NUMA
1083 for (i = 0; i < MAXMEMDOM; i++) {
1084 if (p->pm_numa[i].count != 0)
1085 p->pm_num_dom++;
1086 }
1087 #endif
1088 speed = lacp_aggregator_bandwidth(la);
1089 }
1090 sc->sc_ifp->if_baudrate = speed;
1091 EVENTHANDLER_INVOKE(ifnet_event, sc->sc_ifp,
1092 IFNET_EVENT_UPDATE_BAUDRATE);
1093
1094 /* switch the active portmap over */
1095 atomic_store_rel_int(&lsc->lsc_activemap, newmap);
1096 LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
1097 lsc->lsc_activemap,
1098 lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
1099 }
1100
1101 static uint16_t
1102 lacp_compose_key(struct lacp_port *lp)
1103 {
1104 struct lagg_port *lgp = lp->lp_lagg;
1105 struct lagg_softc *sc = lgp->lp_softc;
1106 u_int media = lp->lp_media;
1107 uint16_t key;
1108
1109 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
1110 /*
1111 * non-aggregatable links should have unique keys.
1112 *
1113 * XXX this isn't really unique as if_index is 16 bit.
1114 */
1115
1116 /* bit 0..14: (some bits of) if_index of this port */
1117 key = lp->lp_ifp->if_index;
1118 /* bit 15: 1 */
1119 key |= 0x8000;
1120 } else {
1121 u_int subtype = IFM_SUBTYPE(media);
1122
1123 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
1124 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
1125
1126 /* bit 0..4: IFM_SUBTYPE modulo speed */
1127 switch (subtype) {
1128 case IFM_10_T:
1129 case IFM_10_2:
1130 case IFM_10_5:
1131 case IFM_10_STP:
1132 case IFM_10_FL:
1133 key = IFM_10_T;
1134 break;
1135 case IFM_100_TX:
1136 case IFM_100_FX:
1137 case IFM_100_T4:
1138 case IFM_100_VG:
1139 case IFM_100_T2:
1140 case IFM_100_T:
1141 case IFM_100_SGMII:
1142 key = IFM_100_TX;
1143 break;
1144 case IFM_1000_SX:
1145 case IFM_1000_LX:
1146 case IFM_1000_CX:
1147 case IFM_1000_T:
1148 case IFM_1000_KX:
1149 case IFM_1000_SGMII:
1150 case IFM_1000_CX_SGMII:
1151 key = IFM_1000_SX;
1152 break;
1153 case IFM_10G_LR:
1154 case IFM_10G_SR:
1155 case IFM_10G_CX4:
1156 case IFM_10G_TWINAX:
1157 case IFM_10G_TWINAX_LONG:
1158 case IFM_10G_LRM:
1159 case IFM_10G_T:
1160 case IFM_10G_KX4:
1161 case IFM_10G_KR:
1162 case IFM_10G_CR1:
1163 case IFM_10G_ER:
1164 case IFM_10G_SFI:
1165 case IFM_10G_AOC:
1166 key = IFM_10G_LR;
1167 break;
1168 case IFM_20G_KR2:
1169 key = IFM_20G_KR2;
1170 break;
1171 case IFM_2500_KX:
1172 case IFM_2500_T:
1173 case IFM_2500_X:
1174 key = IFM_2500_KX;
1175 break;
1176 case IFM_5000_T:
1177 case IFM_5000_KR:
1178 case IFM_5000_KR_S:
1179 case IFM_5000_KR1:
1180 key = IFM_5000_T;
1181 break;
1182 case IFM_50G_PCIE:
1183 case IFM_50G_CR2:
1184 case IFM_50G_KR2:
1185 case IFM_50G_KR4:
1186 case IFM_50G_SR2:
1187 case IFM_50G_LR2:
1188 case IFM_50G_LAUI2_AC:
1189 case IFM_50G_LAUI2:
1190 case IFM_50G_AUI2_AC:
1191 case IFM_50G_AUI2:
1192 case IFM_50G_CP:
1193 case IFM_50G_SR:
1194 case IFM_50G_LR:
1195 case IFM_50G_FR:
1196 case IFM_50G_KR_PAM4:
1197 case IFM_50G_AUI1_AC:
1198 case IFM_50G_AUI1:
1199 key = IFM_50G_PCIE;
1200 break;
1201 case IFM_56G_R4:
1202 key = IFM_56G_R4;
1203 break;
1204 case IFM_25G_PCIE:
1205 case IFM_25G_CR:
1206 case IFM_25G_KR:
1207 case IFM_25G_SR:
1208 case IFM_25G_LR:
1209 case IFM_25G_ACC:
1210 case IFM_25G_AOC:
1211 case IFM_25G_T:
1212 case IFM_25G_CR_S:
1213 case IFM_25G_CR1:
1214 case IFM_25G_KR_S:
1215 case IFM_25G_AUI:
1216 case IFM_25G_KR1:
1217 key = IFM_25G_PCIE;
1218 break;
1219 case IFM_40G_CR4:
1220 case IFM_40G_SR4:
1221 case IFM_40G_LR4:
1222 case IFM_40G_LM4:
1223 case IFM_40G_XLPPI:
1224 case IFM_40G_KR4:
1225 case IFM_40G_XLAUI:
1226 case IFM_40G_XLAUI_AC:
1227 case IFM_40G_ER4:
1228 key = IFM_40G_CR4;
1229 break;
1230 case IFM_100G_CR4:
1231 case IFM_100G_SR4:
1232 case IFM_100G_KR4:
1233 case IFM_100G_LR4:
1234 case IFM_100G_CAUI4_AC:
1235 case IFM_100G_CAUI4:
1236 case IFM_100G_AUI4_AC:
1237 case IFM_100G_AUI4:
1238 case IFM_100G_CR_PAM4:
1239 case IFM_100G_KR_PAM4:
1240 case IFM_100G_CP2:
1241 case IFM_100G_SR2:
1242 case IFM_100G_DR:
1243 case IFM_100G_KR2_PAM4:
1244 case IFM_100G_CAUI2_AC:
1245 case IFM_100G_CAUI2:
1246 case IFM_100G_AUI2_AC:
1247 case IFM_100G_AUI2:
1248 key = IFM_100G_CR4;
1249 break;
1250 case IFM_200G_CR4_PAM4:
1251 case IFM_200G_SR4:
1252 case IFM_200G_FR4:
1253 case IFM_200G_LR4:
1254 case IFM_200G_DR4:
1255 case IFM_200G_KR4_PAM4:
1256 case IFM_200G_AUI4_AC:
1257 case IFM_200G_AUI4:
1258 case IFM_200G_AUI8_AC:
1259 case IFM_200G_AUI8:
1260 key = IFM_200G_CR4_PAM4;
1261 break;
1262 case IFM_400G_FR8:
1263 case IFM_400G_LR8:
1264 case IFM_400G_DR4:
1265 case IFM_400G_AUI8_AC:
1266 case IFM_400G_AUI8:
1267 key = IFM_400G_FR8;
1268 break;
1269 default:
1270 key = subtype;
1271 break;
1272 }
1273 /* bit 5..14: (some bits of) if_index of lagg device */
1274 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
1275 /* bit 15: 0 */
1276 }
1277 return (htons(key));
1278 }
1279
1280 static void
1281 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1282 {
1283 char buf[LACP_LAGIDSTR_MAX+1];
1284
1285 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1286 __func__,
1287 lacp_format_lagid(&la->la_actor, &la->la_partner,
1288 buf, sizeof(buf)),
1289 la->la_refcnt, la->la_refcnt + 1));
1290
1291 KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
1292 la->la_refcnt++;
1293 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
1294 }
1295
1296 static void
1297 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
1298 {
1299 char buf[LACP_LAGIDSTR_MAX+1];
1300
1301 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
1302 __func__,
1303 lacp_format_lagid(&la->la_actor, &la->la_partner,
1304 buf, sizeof(buf)),
1305 la->la_refcnt, la->la_refcnt - 1));
1306
1307 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
1308 la->la_refcnt--;
1309 if (la->la_refcnt > 0) {
1310 return;
1311 }
1312
1313 KASSERT(la->la_refcnt == 0, ("refcount not zero"));
1314 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
1315
1316 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
1317
1318 free(la, M_DEVBUF);
1319 }
1320
1321 /*
1322 * lacp_aggregator_get: allocate an aggregator.
1323 */
1324
1325 static struct lacp_aggregator *
1326 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
1327 {
1328 struct lacp_aggregator *la;
1329
1330 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
1331 if (la) {
1332 la->la_refcnt = 1;
1333 la->la_nports = 0;
1334 TAILQ_INIT(&la->la_ports);
1335 la->la_pending = 0;
1336 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
1337 }
1338
1339 return (la);
1340 }
1341
1342 /*
1343 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
1344 */
1345
1346 static void
1347 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
1348 {
1349 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
1350 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
1351
1352 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
1353 }
1354
1355 static void
1356 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
1357 const struct lacp_peerinfo *lpi_port)
1358 {
1359 memset(lpi_aggr, 0, sizeof(*lpi_aggr));
1360 lpi_aggr->lip_systemid = lpi_port->lip_systemid;
1361 lpi_aggr->lip_key = lpi_port->lip_key;
1362 }
1363
1364 /*
1365 * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
1366 */
1367
1368 static int
1369 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
1370 const struct lacp_port *lp)
1371 {
1372 if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
1373 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
1374 return (0);
1375 }
1376
1377 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
1378 return (0);
1379 }
1380
1381 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
1382 return (0);
1383 }
1384
1385 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
1386 return (0);
1387 }
1388
1389 return (1);
1390 }
1391
1392 static int
1393 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
1394 const struct lacp_peerinfo *b)
1395 {
1396 if (memcmp(&a->lip_systemid, &b->lip_systemid,
1397 sizeof(a->lip_systemid))) {
1398 return (0);
1399 }
1400
1401 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
1402 return (0);
1403 }
1404
1405 return (1);
1406 }
1407
1408 static void
1409 lacp_port_enable(struct lacp_port *lp)
1410 {
1411 lp->lp_state |= LACP_STATE_AGGREGATION;
1412 }
1413
1414 static void
1415 lacp_port_disable(struct lacp_port *lp)
1416 {
1417 lacp_set_mux(lp, LACP_MUX_DETACHED);
1418
1419 lp->lp_state &= ~LACP_STATE_AGGREGATION;
1420 lp->lp_selected = LACP_UNSELECTED;
1421 lacp_sm_rx_record_default(lp);
1422 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
1423 lp->lp_state &= ~LACP_STATE_EXPIRED;
1424 }
1425
1426 /*
1427 * lacp_select: select an aggregator. create one if necessary.
1428 */
1429 static void
1430 lacp_select(struct lacp_port *lp)
1431 {
1432 struct lacp_softc *lsc = lp->lp_lsc;
1433 struct lacp_aggregator *la;
1434 char buf[LACP_LAGIDSTR_MAX+1];
1435
1436 if (lp->lp_aggregator) {
1437 return;
1438 }
1439
1440 /* If we haven't heard from our peer, skip this step. */
1441 if (lp->lp_state & LACP_STATE_DEFAULTED)
1442 return;
1443
1444 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1445 ("timer_wait_while still active"));
1446
1447 LACP_DPRINTF((lp, "port lagid=%s\n",
1448 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
1449 buf, sizeof(buf))));
1450
1451 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
1452 if (lacp_aggregator_is_compatible(la, lp)) {
1453 break;
1454 }
1455 }
1456
1457 if (la == NULL) {
1458 la = lacp_aggregator_get(lsc, lp);
1459 if (la == NULL) {
1460 LACP_DPRINTF((lp, "aggregator creation failed\n"));
1461
1462 /*
1463 * will retry on the next tick.
1464 */
1465
1466 return;
1467 }
1468 lacp_fill_aggregator_id(la, lp);
1469 LACP_DPRINTF((lp, "aggregator created\n"));
1470 } else {
1471 LACP_DPRINTF((lp, "compatible aggregator found\n"));
1472 if (la->la_refcnt == LACP_MAX_PORTS)
1473 return;
1474 lacp_aggregator_addref(lsc, la);
1475 }
1476
1477 LACP_DPRINTF((lp, "aggregator lagid=%s\n",
1478 lacp_format_lagid(&la->la_actor, &la->la_partner,
1479 buf, sizeof(buf))));
1480
1481 lp->lp_aggregator = la;
1482 lp->lp_selected = LACP_SELECTED;
1483 }
1484
1485 /*
1486 * lacp_unselect: finish unselect/detach process.
1487 */
1488
1489 static void
1490 lacp_unselect(struct lacp_port *lp)
1491 {
1492 struct lacp_softc *lsc = lp->lp_lsc;
1493 struct lacp_aggregator *la = lp->lp_aggregator;
1494
1495 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1496 ("timer_wait_while still active"));
1497
1498 if (la == NULL) {
1499 return;
1500 }
1501
1502 lp->lp_aggregator = NULL;
1503 lacp_aggregator_delref(lsc, la);
1504 }
1505
1506 /* mux machine */
1507
1508 static void
1509 lacp_sm_mux(struct lacp_port *lp)
1510 {
1511 struct lagg_port *lgp = lp->lp_lagg;
1512 struct lagg_softc *sc = lgp->lp_softc;
1513 enum lacp_mux_state new_state;
1514 boolean_t p_sync =
1515 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
1516 boolean_t p_collecting =
1517 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
1518 enum lacp_selected selected = lp->lp_selected;
1519 struct lacp_aggregator *la;
1520
1521 if (V_lacp_debug > 1)
1522 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
1523 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
1524 lp->lp_mux_state, selected, p_sync, p_collecting);
1525
1526 re_eval:
1527 la = lp->lp_aggregator;
1528 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
1529 ("MUX not detached"));
1530 new_state = lp->lp_mux_state;
1531 switch (lp->lp_mux_state) {
1532 case LACP_MUX_DETACHED:
1533 if (selected != LACP_UNSELECTED) {
1534 new_state = LACP_MUX_WAITING;
1535 }
1536 break;
1537 case LACP_MUX_WAITING:
1538 KASSERT(la->la_pending > 0 ||
1539 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
1540 ("timer_wait_while still active"));
1541 if (selected == LACP_SELECTED && la->la_pending == 0) {
1542 new_state = LACP_MUX_ATTACHED;
1543 } else if (selected == LACP_UNSELECTED) {
1544 new_state = LACP_MUX_DETACHED;
1545 }
1546 break;
1547 case LACP_MUX_ATTACHED:
1548 if (selected == LACP_SELECTED && p_sync) {
1549 new_state = LACP_MUX_COLLECTING;
1550 } else if (selected != LACP_SELECTED) {
1551 new_state = LACP_MUX_DETACHED;
1552 }
1553 break;
1554 case LACP_MUX_COLLECTING:
1555 if (selected == LACP_SELECTED && p_sync && p_collecting) {
1556 new_state = LACP_MUX_DISTRIBUTING;
1557 } else if (selected != LACP_SELECTED || !p_sync) {
1558 new_state = LACP_MUX_ATTACHED;
1559 }
1560 break;
1561 case LACP_MUX_DISTRIBUTING:
1562 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
1563 new_state = LACP_MUX_COLLECTING;
1564 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
1565 sc->sc_flapping++;
1566 }
1567 break;
1568 default:
1569 panic("%s: unknown state", __func__);
1570 }
1571
1572 if (lp->lp_mux_state == new_state) {
1573 return;
1574 }
1575
1576 lacp_set_mux(lp, new_state);
1577 goto re_eval;
1578 }
1579
1580 static void
1581 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
1582 {
1583 struct lacp_aggregator *la = lp->lp_aggregator;
1584
1585 if (lp->lp_mux_state == new_state) {
1586 return;
1587 }
1588
1589 switch (new_state) {
1590 case LACP_MUX_DETACHED:
1591 lp->lp_state &= ~LACP_STATE_SYNC;
1592 lacp_disable_distributing(lp);
1593 lacp_disable_collecting(lp);
1594 lacp_sm_assert_ntt(lp);
1595 /* cancel timer */
1596 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
1597 KASSERT(la->la_pending > 0,
1598 ("timer_wait_while not active"));
1599 la->la_pending--;
1600 }
1601 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
1602 lacp_unselect(lp);
1603 break;
1604 case LACP_MUX_WAITING:
1605 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
1606 LACP_AGGREGATE_WAIT_TIME);
1607 la->la_pending++;
1608 break;
1609 case LACP_MUX_ATTACHED:
1610 lp->lp_state |= LACP_STATE_SYNC;
1611 lacp_disable_collecting(lp);
1612 lacp_sm_assert_ntt(lp);
1613 break;
1614 case LACP_MUX_COLLECTING:
1615 lacp_enable_collecting(lp);
1616 lacp_disable_distributing(lp);
1617 lacp_sm_assert_ntt(lp);
1618 break;
1619 case LACP_MUX_DISTRIBUTING:
1620 lacp_enable_distributing(lp);
1621 break;
1622 default:
1623 panic("%s: unknown state", __func__);
1624 }
1625
1626 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
1627
1628 lp->lp_mux_state = new_state;
1629 }
1630
1631 static void
1632 lacp_sm_mux_timer(struct lacp_port *lp)
1633 {
1634 struct lacp_aggregator *la = lp->lp_aggregator;
1635 char buf[LACP_LAGIDSTR_MAX+1];
1636
1637 KASSERT(la->la_pending > 0, ("no pending event"));
1638
1639 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
1640 lacp_format_lagid(&la->la_actor, &la->la_partner,
1641 buf, sizeof(buf)),
1642 la->la_pending, la->la_pending - 1));
1643
1644 la->la_pending--;
1645 }
1646
1647 /* periodic transmit machine */
1648
1649 static void
1650 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
1651 {
1652 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
1653 LACP_STATE_TIMEOUT)) {
1654 return;
1655 }
1656
1657 LACP_DPRINTF((lp, "partner timeout changed\n"));
1658
1659 /*
1660 * FAST_PERIODIC -> SLOW_PERIODIC
1661 * or
1662 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
1663 *
1664 * let lacp_sm_ptx_tx_schedule to update timeout.
1665 */
1666
1667 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1668
1669 /*
1670 * if timeout has been shortened, assert NTT.
1671 */
1672
1673 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
1674 lacp_sm_assert_ntt(lp);
1675 }
1676 }
1677
1678 static void
1679 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
1680 {
1681 int timeout;
1682
1683 if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
1684 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
1685 /*
1686 * NO_PERIODIC
1687 */
1688
1689 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
1690 return;
1691 }
1692
1693 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
1694 return;
1695 }
1696
1697 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
1698 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
1699
1700 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
1701 }
1702
1703 static void
1704 lacp_sm_ptx_timer(struct lacp_port *lp)
1705 {
1706 lacp_sm_assert_ntt(lp);
1707 }
1708
1709 static void
1710 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
1711 {
1712 int timeout;
1713
1714 /*
1715 * check LACP_DISABLED first
1716 */
1717
1718 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
1719 return;
1720 }
1721
1722 /*
1723 * check loopback condition.
1724 */
1725
1726 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
1727 &lp->lp_actor.lip_systemid)) {
1728 return;
1729 }
1730
1731 /*
1732 * EXPIRED, DEFAULTED, CURRENT -> CURRENT
1733 */
1734
1735 microuptime(&lp->lp_last_lacpdu_rx);
1736 lacp_sm_rx_update_selected(lp, du);
1737 lacp_sm_rx_update_ntt(lp, du);
1738 lacp_sm_rx_record_pdu(lp, du);
1739
1740 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
1741 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
1742 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
1743
1744 lp->lp_state &= ~LACP_STATE_EXPIRED;
1745
1746 /*
1747 * kick transmit machine without waiting the next tick.
1748 */
1749
1750 lacp_sm_tx(lp);
1751 }
1752
1753 static void
1754 lacp_sm_rx_set_expired(struct lacp_port *lp)
1755 {
1756 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1757 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
1758 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
1759 lp->lp_state |= LACP_STATE_EXPIRED;
1760 }
1761
1762 static void
1763 lacp_sm_rx_timer(struct lacp_port *lp)
1764 {
1765 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
1766 /* CURRENT -> EXPIRED */
1767 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
1768 lacp_sm_rx_set_expired(lp);
1769 } else {
1770 /* EXPIRED -> DEFAULTED */
1771 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
1772 lacp_sm_rx_update_default_selected(lp);
1773 lacp_sm_rx_record_default(lp);
1774 lp->lp_state &= ~LACP_STATE_EXPIRED;
1775 }
1776 }
1777
1778 static void
1779 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
1780 {
1781 boolean_t active;
1782 uint8_t oldpstate;
1783 char buf[LACP_STATESTR_MAX+1];
1784
1785 LACP_TRACE(lp);
1786
1787 oldpstate = lp->lp_partner.lip_state;
1788
1789 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
1790 || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
1791 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
1792
1793 lp->lp_partner = du->ldu_actor;
1794 if (active &&
1795 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1796 LACP_STATE_AGGREGATION) &&
1797 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
1798 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
1799 /*
1800 * XXX Maintain legacy behavior of leaving the
1801 * LACP_STATE_SYNC bit unchanged from the partner's
1802 * advertisement if lsc_strict_mode is false.
1803 * TODO: We should re-examine the concept of the "strict mode"
1804 * to ensure it makes sense to maintain a non-strict mode.
1805 */
1806 if (lp->lp_lsc->lsc_strict_mode)
1807 lp->lp_partner.lip_state |= LACP_STATE_SYNC;
1808 } else {
1809 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
1810 }
1811
1812 lp->lp_state &= ~LACP_STATE_DEFAULTED;
1813
1814 if (oldpstate != lp->lp_partner.lip_state) {
1815 LACP_DPRINTF((lp, "old pstate %s\n",
1816 lacp_format_state(oldpstate, buf, sizeof(buf))));
1817 LACP_DPRINTF((lp, "new pstate %s\n",
1818 lacp_format_state(lp->lp_partner.lip_state, buf,
1819 sizeof(buf))));
1820 }
1821
1822 lacp_sm_ptx_update_timeout(lp, oldpstate);
1823 }
1824
1825 static void
1826 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
1827 {
1828
1829 LACP_TRACE(lp);
1830
1831 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
1832 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
1833 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
1834 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
1835 lacp_sm_assert_ntt(lp);
1836 }
1837 }
1838
1839 static void
1840 lacp_sm_rx_record_default(struct lacp_port *lp)
1841 {
1842 uint8_t oldpstate;
1843
1844 LACP_TRACE(lp);
1845
1846 oldpstate = lp->lp_partner.lip_state;
1847 if (lp->lp_lsc->lsc_strict_mode)
1848 lp->lp_partner = lacp_partner_admin_strict;
1849 else
1850 lp->lp_partner = lacp_partner_admin_optimistic;
1851 lp->lp_state |= LACP_STATE_DEFAULTED;
1852 lacp_sm_ptx_update_timeout(lp, oldpstate);
1853 }
1854
1855 static void
1856 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
1857 const struct lacp_peerinfo *info)
1858 {
1859
1860 LACP_TRACE(lp);
1861
1862 if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
1863 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
1864 LACP_STATE_AGGREGATION)) {
1865 lp->lp_selected = LACP_UNSELECTED;
1866 /* mux machine will clean up lp->lp_aggregator */
1867 }
1868 }
1869
1870 static void
1871 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
1872 {
1873
1874 LACP_TRACE(lp);
1875
1876 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
1877 }
1878
1879 static void
1880 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
1881 {
1882
1883 LACP_TRACE(lp);
1884
1885 if (lp->lp_lsc->lsc_strict_mode)
1886 lacp_sm_rx_update_selected_from_peerinfo(lp,
1887 &lacp_partner_admin_strict);
1888 else
1889 lacp_sm_rx_update_selected_from_peerinfo(lp,
1890 &lacp_partner_admin_optimistic);
1891 }
1892
1893 /* transmit machine */
1894
1895 static void
1896 lacp_sm_tx(struct lacp_port *lp)
1897 {
1898 int error = 0;
1899
1900 if (!(lp->lp_state & LACP_STATE_AGGREGATION)
1901 #if 1
1902 || (!(lp->lp_state & LACP_STATE_ACTIVITY)
1903 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
1904 #endif
1905 ) {
1906 lp->lp_flags &= ~LACP_PORT_NTT;
1907 }
1908
1909 if (!(lp->lp_flags & LACP_PORT_NTT)) {
1910 return;
1911 }
1912
1913 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
1914 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
1915 (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
1916 LACP_DPRINTF((lp, "rate limited pdu\n"));
1917 return;
1918 }
1919
1920 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
1921 error = lacp_xmit_lacpdu(lp);
1922 } else {
1923 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
1924 }
1925
1926 if (error == 0) {
1927 lp->lp_flags &= ~LACP_PORT_NTT;
1928 } else {
1929 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
1930 error));
1931 }
1932 }
1933
1934 static void
1935 lacp_sm_assert_ntt(struct lacp_port *lp)
1936 {
1937
1938 lp->lp_flags |= LACP_PORT_NTT;
1939 }
1940
1941 static void
1942 lacp_run_timers(struct lacp_port *lp)
1943 {
1944 int i;
1945 struct timeval time_diff;
1946
1947 for (i = 0; i < LACP_NTIMER; i++) {
1948 KASSERT(lp->lp_timer[i] >= 0,
1949 ("invalid timer value %d", lp->lp_timer[i]));
1950 if (lp->lp_timer[i] == 0) {
1951 continue;
1952 } else {
1953 if (i == LACP_TIMER_CURRENT_WHILE) {
1954 microuptime(&time_diff);
1955 timevalsub(&time_diff, &lp->lp_last_lacpdu_rx);
1956 if (time_diff.tv_sec) {
1957 /* At least one sec has elapsed since last LACP packet. */
1958 --lp->lp_timer[i];
1959 }
1960 } else {
1961 --lp->lp_timer[i];
1962 }
1963
1964 if ((lp->lp_timer[i] <= 0) && (lacp_timer_funcs[i])) {
1965 (*lacp_timer_funcs[i])(lp);
1966 }
1967 }
1968 }
1969 }
1970
1971 int
1972 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
1973 {
1974 struct lacp_softc *lsc = lp->lp_lsc;
1975 struct lagg_port *lgp = lp->lp_lagg;
1976 struct lacp_port *lp2;
1977 struct markerdu *mdu;
1978 int error = 0;
1979 int pending = 0;
1980
1981 if (m->m_pkthdr.len != sizeof(*mdu)) {
1982 goto bad;
1983 }
1984
1985 if ((m->m_flags & M_MCAST) == 0) {
1986 goto bad;
1987 }
1988
1989 if (m->m_len < sizeof(*mdu)) {
1990 m = m_pullup(m, sizeof(*mdu));
1991 if (m == NULL) {
1992 return (ENOMEM);
1993 }
1994 }
1995
1996 mdu = mtod(m, struct markerdu *);
1997
1998 if (memcmp(&mdu->mdu_eh.ether_dhost,
1999 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
2000 goto bad;
2001 }
2002
2003 if (mdu->mdu_sph.sph_version != 1) {
2004 goto bad;
2005 }
2006
2007 switch (mdu->mdu_tlv.tlv_type) {
2008 case MARKER_TYPE_INFO:
2009 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
2010 marker_info_tlv_template, TRUE)) {
2011 goto bad;
2012 }
2013 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
2014 memcpy(&mdu->mdu_eh.ether_dhost,
2015 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
2016 memcpy(&mdu->mdu_eh.ether_shost,
2017 lgp->lp_lladdr, ETHER_ADDR_LEN);
2018 error = lagg_enqueue(lp->lp_ifp, m);
2019 break;
2020
2021 case MARKER_TYPE_RESPONSE:
2022 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
2023 marker_response_tlv_template, TRUE)) {
2024 goto bad;
2025 }
2026 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
2027 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
2028 ":", ntohl(mdu->mdu_info.mi_rq_xid)));
2029
2030 /* Verify that it is the last marker we sent out */
2031 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
2032 sizeof(struct lacp_markerinfo)))
2033 goto bad;
2034
2035 LACP_LOCK(lsc);
2036 lp->lp_flags &= ~LACP_PORT_MARK;
2037
2038 if (lsc->lsc_suppress_distributing) {
2039 /* Check if any ports are waiting for a response */
2040 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
2041 if (lp2->lp_flags & LACP_PORT_MARK) {
2042 pending = 1;
2043 break;
2044 }
2045 }
2046
2047 if (pending == 0) {
2048 /* All interface queues are clear */
2049 LACP_DPRINTF((NULL, "queue flush complete\n"));
2050 lsc->lsc_suppress_distributing = FALSE;
2051 }
2052 }
2053 LACP_UNLOCK(lsc);
2054 m_freem(m);
2055 break;
2056
2057 default:
2058 goto bad;
2059 }
2060
2061 return (error);
2062
2063 bad:
2064 LACP_DPRINTF((lp, "bad marker frame\n"));
2065 m_freem(m);
2066 return (EINVAL);
2067 }
2068
2069 static int
2070 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
2071 const struct tlv_template *tmpl, boolean_t check_type)
2072 {
2073 while (/* CONSTCOND */ 1) {
2074 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
2075 return (EINVAL);
2076 }
2077 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
2078 tlv->tlv_length != tmpl->tmpl_length) {
2079 return (EINVAL);
2080 }
2081 if (tmpl->tmpl_type == 0) {
2082 break;
2083 }
2084 tlv = (const struct tlvhdr *)
2085 ((const char *)tlv + tlv->tlv_length);
2086 tmpl++;
2087 }
2088
2089 return (0);
2090 }
2091
2092 /* Debugging */
2093 const char *
2094 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
2095 {
2096 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
2097 (int)mac[0],
2098 (int)mac[1],
2099 (int)mac[2],
2100 (int)mac[3],
2101 (int)mac[4],
2102 (int)mac[5]);
2103
2104 return (buf);
2105 }
2106
2107 const char *
2108 lacp_format_systemid(const struct lacp_systemid *sysid,
2109 char *buf, size_t buflen)
2110 {
2111 char macbuf[LACP_MACSTR_MAX+1];
2112
2113 snprintf(buf, buflen, "%04X,%s",
2114 ntohs(sysid->lsi_prio),
2115 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
2116
2117 return (buf);
2118 }
2119
2120 const char *
2121 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
2122 {
2123 snprintf(buf, buflen, "%04X,%04X",
2124 ntohs(portid->lpi_prio),
2125 ntohs(portid->lpi_portno));
2126
2127 return (buf);
2128 }
2129
2130 const char *
2131 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
2132 {
2133 char sysid[LACP_SYSTEMIDSTR_MAX+1];
2134 char portid[LACP_PORTIDSTR_MAX+1];
2135
2136 snprintf(buf, buflen, "(%s,%04X,%s)",
2137 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
2138 ntohs(peer->lip_key),
2139 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
2140
2141 return (buf);
2142 }
2143
2144 const char *
2145 lacp_format_lagid(const struct lacp_peerinfo *a,
2146 const struct lacp_peerinfo *b, char *buf, size_t buflen)
2147 {
2148 char astr[LACP_PARTNERSTR_MAX+1];
2149 char bstr[LACP_PARTNERSTR_MAX+1];
2150
2151 #if 0
2152 /*
2153 * there's a convention to display small numbered peer
2154 * in the left.
2155 */
2156
2157 if (lacp_compare_peerinfo(a, b) > 0) {
2158 const struct lacp_peerinfo *t;
2159
2160 t = a;
2161 a = b;
2162 b = t;
2163 }
2164 #endif
2165
2166 snprintf(buf, buflen, "[%s,%s]",
2167 lacp_format_partner(a, astr, sizeof(astr)),
2168 lacp_format_partner(b, bstr, sizeof(bstr)));
2169
2170 return (buf);
2171 }
2172
2173 const char *
2174 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
2175 char *buf, size_t buflen)
2176 {
2177 if (la == NULL) {
2178 return ("(none)");
2179 }
2180
2181 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
2182 }
2183
2184 const char *
2185 lacp_format_state(uint8_t state, char *buf, size_t buflen)
2186 {
2187 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
2188 return (buf);
2189 }
2190
2191 static void
2192 lacp_dump_lacpdu(const struct lacpdu *du)
2193 {
2194 char buf[LACP_PARTNERSTR_MAX+1];
2195 char buf2[LACP_STATESTR_MAX+1];
2196
2197 printf("actor=%s\n",
2198 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
2199 printf("actor.state=%s\n",
2200 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
2201 printf("partner=%s\n",
2202 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
2203 printf("partner.state=%s\n",
2204 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
2205
2206 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
2207 }
2208
2209 static void
2210 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
2211 {
2212 va_list va;
2213
2214 if (lp) {
2215 printf("%s: ", lp->lp_ifp->if_xname);
2216 }
2217
2218 va_start(va, fmt);
2219 vprintf(fmt, va);
2220 va_end(va);
2221 }
Cache object: dc1bd725c2387606df3d872f770667ec
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