1 | /* $NetBSD: ieee8023ad_lacp.c,v 1.10 2011/07/01 02:46:24 joerg Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c)2005 YAMAMOTO Takashi, |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
26 | * SUCH DAMAGE. |
27 | */ |
28 | |
29 | #include <sys/cdefs.h> |
30 | __KERNEL_RCSID(0, "$NetBSD: ieee8023ad_lacp.c,v 1.10 2011/07/01 02:46:24 joerg Exp $" ); |
31 | |
32 | #include <sys/param.h> |
33 | #include <sys/callout.h> |
34 | #include <sys/mbuf.h> |
35 | #include <sys/systm.h> |
36 | #include <sys/malloc.h> |
37 | #include <sys/kernel.h> /* hz */ |
38 | |
39 | #include <net/if.h> |
40 | #include <net/if_dl.h> |
41 | #include <net/if_ether.h> |
42 | #include <net/if_media.h> |
43 | |
44 | #include <net/agr/if_agrvar_impl.h> |
45 | #include <net/agr/if_agrsubr.h> |
46 | #include <net/agr/ieee8023_slowprotocols.h> |
47 | #include <net/agr/ieee8023_tlv.h> |
48 | #include <net/agr/ieee8023ad.h> |
49 | #include <net/agr/ieee8023ad_lacp.h> |
50 | #include <net/agr/ieee8023ad_lacp_impl.h> |
51 | #include <net/agr/ieee8023ad_impl.h> |
52 | #include <net/agr/ieee8023ad_lacp_sm.h> |
53 | #include <net/agr/ieee8023ad_lacp_debug.h> |
54 | |
55 | static void lacp_fill_actorinfo(struct agr_port *, struct lacp_peerinfo *); |
56 | |
57 | static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *); |
58 | static void lacp_suppress_distributing(struct lacp_softc *, |
59 | struct lacp_aggregator *); |
60 | static void lacp_transit_expire(void *); |
61 | static void lacp_select_active_aggregator(struct lacp_softc *); |
62 | static uint16_t lacp_compose_key(struct lacp_port *); |
63 | |
64 | /* |
65 | * actor system priority and port priority. |
66 | * XXX should be configurable. |
67 | */ |
68 | |
69 | #define LACP_SYSTEM_PRIO 0x8000 |
70 | #define LACP_PORT_PRIO 0x8000 |
71 | |
72 | static const struct tlv_template lacp_info_tlv_template[] = { |
73 | { LACP_TYPE_ACTORINFO, |
74 | sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, |
75 | { LACP_TYPE_PARTNERINFO, |
76 | sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, |
77 | { LACP_TYPE_COLLECTORINFO, |
78 | sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) }, |
79 | { 0, 0 }, |
80 | }; |
81 | |
82 | /* |
83 | * ieee8023ad_lacp_input: process lacpdu |
84 | * |
85 | * => called from ether_input. (ie. at IPL_NET) |
86 | * |
87 | * XXX is it better to defer processing to lower IPL? |
88 | * XXX anyway input rate should be very low... |
89 | */ |
90 | |
91 | int |
92 | ieee8023ad_lacp_input(struct ifnet *ifp, struct mbuf *m) |
93 | { |
94 | struct lacpdu *du; |
95 | struct agr_softc *sc; |
96 | struct agr_port *port; |
97 | struct lacp_port *lp; |
98 | int error = 0; |
99 | |
100 | port = ifp->if_agrprivate; /* XXX race with agr_remport. */ |
101 | if (__predict_false(port->port_flags & AGRPORT_DETACHING)) { |
102 | goto bad; |
103 | } |
104 | |
105 | sc = AGR_SC_FROM_PORT(port); |
106 | KASSERT(port); |
107 | |
108 | /* running static config? */ |
109 | if (AGR_STATIC(sc)) { |
110 | /* static config, no lacp */ |
111 | goto bad; |
112 | } |
113 | |
114 | |
115 | if (m->m_pkthdr.len != sizeof(*du)) { |
116 | goto bad; |
117 | } |
118 | |
119 | if ((m->m_flags & M_MCAST) == 0) { |
120 | goto bad; |
121 | } |
122 | |
123 | if (m->m_len < sizeof(*du)) { |
124 | m = m_pullup(m, sizeof(*du)); |
125 | if (m == NULL) { |
126 | return ENOMEM; |
127 | } |
128 | } |
129 | |
130 | du = mtod(m, struct lacpdu *); |
131 | |
132 | if (memcmp(&du->ldu_eh.ether_dhost, |
133 | ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { |
134 | goto bad; |
135 | } |
136 | |
137 | KASSERT(du->ldu_sph.sph_subtype == SLOWPROTOCOLS_SUBTYPE_LACP); |
138 | |
139 | /* |
140 | * ignore the version for compatibility with |
141 | * the future protocol revisions. |
142 | */ |
143 | |
144 | #if 0 |
145 | if (du->ldu_sph.sph_version != 1) { |
146 | goto bad; |
147 | } |
148 | #endif |
149 | |
150 | /* |
151 | * ignore tlv types for compatibility with |
152 | * the future protocol revisions. |
153 | */ |
154 | |
155 | if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor, |
156 | lacp_info_tlv_template, false)) { |
157 | goto bad; |
158 | } |
159 | |
160 | AGR_LOCK(sc); |
161 | lp = LACP_PORT(port); |
162 | |
163 | #if defined(LACP_DEBUG) |
164 | if (lacpdebug) { |
165 | LACP_DPRINTF((lp, "lacpdu receive\n" )); |
166 | lacp_dump_lacpdu(du); |
167 | } |
168 | #endif /* defined(LACP_DEBUG) */ |
169 | lacp_sm_rx(lp, du); |
170 | |
171 | AGR_UNLOCK(sc); |
172 | |
173 | m_freem(m); |
174 | |
175 | return error; |
176 | |
177 | bad: |
178 | m_freem(m); |
179 | return EINVAL; |
180 | } |
181 | |
182 | static void |
183 | lacp_fill_actorinfo(struct agr_port *port, struct lacp_peerinfo *info) |
184 | { |
185 | struct lacp_port *lp = LACP_PORT(port); |
186 | |
187 | info->lip_systemid.lsi_prio = htobe16(LACP_SYSTEM_PRIO); |
188 | memcpy(&info->lip_systemid.lsi_mac, |
189 | CLLADDR(port->port_ifp->if_sadl), ETHER_ADDR_LEN); |
190 | info->lip_portid.lpi_prio = htobe16(LACP_PORT_PRIO); |
191 | info->lip_portid.lpi_portno = htobe16(port->port_ifp->if_index); |
192 | info->lip_state = lp->lp_state; |
193 | } |
194 | |
195 | int |
196 | lacp_xmit_lacpdu(struct lacp_port *lp) |
197 | { |
198 | struct agr_port *port = lp->lp_agrport; |
199 | struct mbuf *m; |
200 | struct lacpdu *du; |
201 | int error; |
202 | |
203 | /* running static config? */ |
204 | if (AGR_STATIC(AGR_SC_FROM_PORT(port))) { |
205 | /* static config, no lacp transmit */ |
206 | return 0; |
207 | } |
208 | |
209 | KDASSERT(MHLEN >= sizeof(*du)); |
210 | |
211 | m = m_gethdr(M_DONTWAIT, MT_DATA); |
212 | if (m == NULL) { |
213 | return ENOMEM; |
214 | } |
215 | m->m_len = m->m_pkthdr.len = sizeof(*du); |
216 | |
217 | du = mtod(m, struct lacpdu *); |
218 | memset(du, 0, sizeof(*du)); |
219 | |
220 | memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols, |
221 | ETHER_ADDR_LEN); |
222 | memcpy(&du->ldu_eh.ether_shost, &port->port_origlladdr, ETHER_ADDR_LEN); |
223 | du->ldu_eh.ether_type = htobe16(ETHERTYPE_SLOWPROTOCOLS); |
224 | |
225 | du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP; |
226 | du->ldu_sph.sph_version = 1; |
227 | |
228 | TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor)); |
229 | du->ldu_actor = lp->lp_actor; |
230 | |
231 | TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO, |
232 | sizeof(du->ldu_partner)); |
233 | du->ldu_partner = lp->lp_partner; |
234 | |
235 | TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO, |
236 | sizeof(du->ldu_collector)); |
237 | du->ldu_collector.lci_maxdelay = 0; |
238 | |
239 | #if defined(LACP_DEBUG) |
240 | if (lacpdebug) { |
241 | LACP_DPRINTF((lp, "lacpdu transmit\n" )); |
242 | lacp_dump_lacpdu(du); |
243 | } |
244 | #endif /* defined(LACP_DEBUG) */ |
245 | |
246 | m->m_flags |= M_MCAST; |
247 | |
248 | /* |
249 | * XXX should use higher priority queue. |
250 | * otherwise network congestion can break aggregation. |
251 | */ |
252 | |
253 | error = agr_xmit_frame(port->port_ifp, m); |
254 | return error; |
255 | } |
256 | |
257 | void |
258 | ieee8023ad_lacp_portstate(struct agr_port *port) |
259 | { |
260 | struct lacp_port *lp = LACP_PORT(port); |
261 | u_int media = port->port_media; |
262 | uint8_t old_state; |
263 | uint16_t old_key; |
264 | |
265 | AGR_ASSERT_LOCKED(AGR_SC_FROM_PORT(port)); |
266 | |
267 | LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x\n" , lp->lp_media, media)); |
268 | |
269 | old_state = lp->lp_state; |
270 | old_key = lp->lp_key; |
271 | |
272 | lp->lp_media = media; |
273 | if ((media & IFM_HDX) != 0) { |
274 | lp->lp_state &= ~LACP_STATE_AGGREGATION; |
275 | } else { |
276 | lp->lp_state |= LACP_STATE_AGGREGATION; |
277 | } |
278 | lp->lp_key = lacp_compose_key(lp); |
279 | |
280 | if (old_state != lp->lp_state || old_key != lp->lp_key) { |
281 | LACP_DPRINTF((lp, "-> UNSELECTED\n" )); |
282 | lp->lp_selected = LACP_UNSELECTED; |
283 | } |
284 | } |
285 | |
286 | void |
287 | ieee8023ad_lacp_porttick(struct agr_softc *sc, struct agr_port *port) |
288 | { |
289 | struct lacp_port *lp = LACP_PORT(port); |
290 | |
291 | AGR_ASSERT_LOCKED(sc); |
292 | |
293 | lacp_run_timers(lp); |
294 | |
295 | lacp_select(lp); |
296 | lacp_sm_mux(lp); |
297 | lacp_sm_tx(lp); |
298 | lacp_sm_ptx_tx_schedule(lp); |
299 | } |
300 | |
301 | void |
302 | lacp_portinit(struct agr_port *port) |
303 | { |
304 | struct lacp_port *lp = LACP_PORT(port); |
305 | bool active = true; /* XXX should be configurable */ |
306 | bool fast = false; /* XXX should be configurable */ |
307 | |
308 | lp->lp_agrport = port; |
309 | lacp_fill_actorinfo(port, &lp->lp_actor); |
310 | lp->lp_state = |
311 | (active ? LACP_STATE_ACTIVITY : 0) | |
312 | (fast ? LACP_STATE_TIMEOUT : 0); |
313 | lp->lp_aggregator = NULL; |
314 | lp->lp_media = port->port_media; /* XXX */ |
315 | lp->lp_key = lacp_compose_key(lp); |
316 | lacp_sm_rx_set_expired(lp); |
317 | } |
318 | |
319 | void |
320 | lacp_portfini(struct agr_port *port) |
321 | { |
322 | struct lacp_port *lp = LACP_PORT(port); |
323 | struct lacp_aggregator *la = lp->lp_aggregator; |
324 | int i; |
325 | |
326 | LACP_DPRINTF((lp, "portfini\n" )); |
327 | |
328 | for (i = 0; i < LACP_NTIMER; i++) { |
329 | LACP_TIMER_DISARM(lp, i); |
330 | } |
331 | |
332 | if (la == NULL) { |
333 | return; |
334 | } |
335 | |
336 | lacp_disable_distributing(lp); |
337 | lacp_unselect(lp); |
338 | } |
339 | |
340 | /* -------------------- */ |
341 | void |
342 | lacp_disable_collecting(struct lacp_port *lp) |
343 | { |
344 | struct agr_port *port = lp->lp_agrport; |
345 | |
346 | lp->lp_state &= ~LACP_STATE_COLLECTING; |
347 | port->port_flags &= ~AGRPORT_COLLECTING; |
348 | } |
349 | |
350 | void |
351 | lacp_enable_collecting(struct lacp_port *lp) |
352 | { |
353 | struct agr_port *port = lp->lp_agrport; |
354 | |
355 | lp->lp_state |= LACP_STATE_COLLECTING; |
356 | port->port_flags |= AGRPORT_COLLECTING; |
357 | } |
358 | |
359 | void |
360 | lacp_disable_distributing(struct lacp_port *lp) |
361 | { |
362 | struct agr_port *port = lp->lp_agrport; |
363 | struct lacp_aggregator *la = lp->lp_aggregator; |
364 | struct lacp_softc *lsc = LACP_SOFTC(AGR_SC_FROM_PORT(port)); |
365 | #if defined(LACP_DEBUG) |
366 | char buf[LACP_LAGIDSTR_MAX+1]; |
367 | #endif /* defined(LACP_DEBUG) */ |
368 | |
369 | if ((lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { |
370 | return; |
371 | } |
372 | |
373 | KASSERT(la); |
374 | KASSERT(!TAILQ_EMPTY(&la->la_ports)); |
375 | KASSERT(la->la_nports > 0); |
376 | KASSERT(la->la_refcnt >= la->la_nports); |
377 | |
378 | LACP_DPRINTF((lp, "disable distributing on aggregator %s, " |
379 | "nports %d -> %d\n" , |
380 | lacp_format_lagid_aggregator(la, buf, sizeof(buf)), |
381 | la->la_nports, la->la_nports - 1)); |
382 | |
383 | TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); |
384 | la->la_nports--; |
385 | |
386 | lacp_suppress_distributing(lsc, la); |
387 | |
388 | lp->lp_state &= ~LACP_STATE_DISTRIBUTING; |
389 | port->port_flags &= ~AGRPORT_DISTRIBUTING; |
390 | |
391 | if (lsc->lsc_active_aggregator == la) { |
392 | lacp_select_active_aggregator(lsc); |
393 | } |
394 | } |
395 | |
396 | void |
397 | lacp_enable_distributing(struct lacp_port *lp) |
398 | { |
399 | struct agr_port *port = lp->lp_agrport; |
400 | struct lacp_aggregator *la = lp->lp_aggregator; |
401 | struct lacp_softc *lsc = LACP_SOFTC(AGR_SC_FROM_PORT(port)); |
402 | #if defined(LACP_DEBUG) |
403 | char buf[LACP_LAGIDSTR_MAX+1]; |
404 | #endif /* defined(LACP_DEBUG) */ |
405 | |
406 | if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { |
407 | return; |
408 | } |
409 | |
410 | KASSERT(la); |
411 | |
412 | LACP_DPRINTF((lp, "enable distributing on aggregator %s, " |
413 | "nports %d -> %d\n" , |
414 | lacp_format_lagid_aggregator(la, buf, sizeof(buf)), |
415 | la->la_nports, la->la_nports + 1)); |
416 | |
417 | KASSERT(la->la_refcnt > la->la_nports); |
418 | TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); |
419 | la->la_nports++; |
420 | |
421 | lacp_suppress_distributing(lsc, la); |
422 | |
423 | lp->lp_state |= LACP_STATE_DISTRIBUTING; |
424 | port->port_flags |= AGRPORT_DISTRIBUTING; |
425 | |
426 | if (lsc->lsc_active_aggregator != la) { |
427 | lacp_select_active_aggregator(lsc); |
428 | } |
429 | } |
430 | |
431 | static void |
432 | lacp_transit_expire(void *vp) |
433 | { |
434 | struct agr_softc *sc = vp; |
435 | struct lacp_softc *lsc = LACP_SOFTC(sc); |
436 | |
437 | AGR_LOCK(sc); |
438 | LACP_DPRINTF((NULL, "%s\n" , __func__)); |
439 | lsc->lsc_suppress_distributing = false; |
440 | AGR_UNLOCK(sc); |
441 | } |
442 | |
443 | /* -------------------- */ |
444 | /* XXX */ |
445 | void |
446 | ieee8023ad_portinit(struct agr_port *port) |
447 | { |
448 | struct ieee8023ad_port *iport = IEEE8023AD_PORT(port); |
449 | |
450 | memset(iport, 0, sizeof(*iport)); |
451 | |
452 | lacp_portinit(port); |
453 | } |
454 | |
455 | void |
456 | ieee8023ad_portfini(struct agr_port *port) |
457 | { |
458 | struct agr_softc *sc = AGR_SC_FROM_PORT(port); |
459 | |
460 | AGR_LOCK(sc); |
461 | |
462 | lacp_portfini(port); |
463 | |
464 | AGR_UNLOCK(sc); |
465 | } |
466 | |
467 | void |
468 | ieee8023ad_ctor(struct agr_softc *sc) |
469 | { |
470 | struct ieee8023ad_softc *isc = IEEE8023AD_SOFTC(sc); |
471 | struct lacp_softc *lsc = &isc->isc_lacpsc; |
472 | |
473 | lsc->lsc_active_aggregator = NULL; |
474 | TAILQ_INIT(&lsc->lsc_aggregators); |
475 | callout_init(&lsc->lsc_transit_callout, 0); |
476 | callout_setfunc(&lsc->lsc_transit_callout, lacp_transit_expire, sc); |
477 | } |
478 | |
479 | void |
480 | ieee8023ad_dtor(struct agr_softc *sc) |
481 | { |
482 | struct ieee8023ad_softc *isc = IEEE8023AD_SOFTC(sc); |
483 | struct lacp_softc *lsc = &isc->isc_lacpsc; |
484 | |
485 | LACP_DPRINTF((NULL, "%s\n" , __func__)); |
486 | |
487 | callout_stop(&lsc->lsc_transit_callout); |
488 | KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators)); |
489 | KASSERT(lsc->lsc_active_aggregator == NULL); |
490 | } |
491 | |
492 | /* -------------------- */ |
493 | |
494 | struct agr_port * |
495 | ieee8023ad_select_tx_port(struct agr_softc *sc, struct mbuf *m) |
496 | { |
497 | const struct lacp_softc *lsc = LACP_SOFTC(sc); |
498 | const struct lacp_aggregator *la; |
499 | const struct lacp_port *lp; |
500 | uint32_t hash; |
501 | int nports; |
502 | |
503 | if (__predict_false(lsc->lsc_suppress_distributing && |
504 | !AGR_ROUNDROBIN(sc))) { |
505 | LACP_DPRINTF((NULL, "%s: waiting transit\n" , __func__)); |
506 | sc->sc_if.if_collisions++; /* XXX abuse */ |
507 | return NULL; |
508 | } |
509 | |
510 | la = lsc->lsc_active_aggregator; |
511 | if (__predict_false(la == NULL)) { |
512 | LACP_DPRINTF((NULL, "%s: no active aggregator\n" , __func__)); |
513 | return NULL; |
514 | } |
515 | |
516 | nports = la->la_nports; |
517 | KASSERT(nports > 0); |
518 | |
519 | if (AGR_ROUNDROBIN(sc)) { |
520 | /* packet ordering rule violation */ |
521 | hash = sc->sc_rr_counter++; |
522 | } else { |
523 | hash = (*sc->sc_iftop->iftop_hashmbuf)(sc, m); |
524 | } |
525 | hash %= nports; |
526 | lp = TAILQ_FIRST(&la->la_ports); |
527 | KASSERT(lp != NULL); |
528 | while (hash--) { |
529 | lp = TAILQ_NEXT(lp, lp_dist_q); |
530 | KASSERT(lp != NULL); |
531 | } |
532 | |
533 | KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0); |
534 | |
535 | return lp->lp_agrport; |
536 | } |
537 | |
538 | /* |
539 | * lacp_suppress_distributing: drop transmit packets for a while |
540 | * to preserve packet ordering. |
541 | */ |
542 | |
543 | static void |
544 | lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) |
545 | { |
546 | |
547 | if (lsc->lsc_active_aggregator != la) { |
548 | return; |
549 | } |
550 | |
551 | LACP_DPRINTF((NULL, "%s\n" , __func__)); |
552 | lsc->lsc_suppress_distributing = true; |
553 | /* XXX should consider collector max delay */ |
554 | callout_schedule(&lsc->lsc_transit_callout, |
555 | LACP_TRANSIT_DELAY * hz / 1000); |
556 | } |
557 | |
558 | /* -------------------- */ |
559 | |
560 | int |
561 | lacp_compare_peerinfo(const struct lacp_peerinfo *a, |
562 | const struct lacp_peerinfo *b) |
563 | { |
564 | |
565 | return memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)); |
566 | } |
567 | |
568 | int |
569 | lacp_compare_systemid(const struct lacp_systemid *a, |
570 | const struct lacp_systemid *b) |
571 | { |
572 | |
573 | return memcmp(a, b, sizeof(*a)); |
574 | } |
575 | |
576 | int |
577 | lacp_compare_portid(const struct lacp_portid *a, |
578 | const struct lacp_portid *b) |
579 | { |
580 | |
581 | return memcmp(a, b, sizeof(*a)); |
582 | } |
583 | |
584 | /* -------------------- */ |
585 | |
586 | static uint64_t |
587 | lacp_aggregator_bandwidth(struct lacp_aggregator *la) |
588 | { |
589 | struct lacp_port *lp; |
590 | uint64_t speed; |
591 | |
592 | lp = TAILQ_FIRST(&la->la_ports); |
593 | if (lp == NULL) { |
594 | return 0; |
595 | } |
596 | |
597 | speed = ifmedia_baudrate(lp->lp_media); |
598 | speed *= la->la_nports; |
599 | if (speed == 0) { |
600 | LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n" , |
601 | lp->lp_media, la->la_nports)); |
602 | } |
603 | |
604 | return speed; |
605 | } |
606 | |
607 | /* |
608 | * lacp_select_active_aggregator: select an aggregator to be used to transmit |
609 | * packets from agr(4) interface. |
610 | */ |
611 | |
612 | static void |
613 | lacp_select_active_aggregator(struct lacp_softc *lsc) |
614 | { |
615 | struct lacp_aggregator *la; |
616 | struct lacp_aggregator *best_la = NULL; |
617 | uint64_t best_speed = 0; |
618 | #if defined(LACP_DEBUG) |
619 | char buf[LACP_LAGIDSTR_MAX+1]; |
620 | #endif /* defined(LACP_DEBUG) */ |
621 | |
622 | LACP_DPRINTF((NULL, "%s:\n" , __func__)); |
623 | |
624 | TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { |
625 | uint64_t speed; |
626 | |
627 | if (la->la_nports == 0) { |
628 | continue; |
629 | } |
630 | |
631 | speed = lacp_aggregator_bandwidth(la); |
632 | LACP_DPRINTF((NULL, "%s, speed=%" PRIu64 ", nports=%d\n" , |
633 | lacp_format_lagid_aggregator(la, buf, sizeof(buf)), |
634 | speed, la->la_nports)); |
635 | if (speed > best_speed || |
636 | (speed == best_speed && |
637 | la == lsc->lsc_active_aggregator)) { |
638 | best_la = la; |
639 | best_speed = speed; |
640 | } |
641 | } |
642 | |
643 | KASSERT(best_la == NULL || best_la->la_nports > 0); |
644 | KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports)); |
645 | |
646 | #if defined(LACP_DEBUG) |
647 | if (lsc->lsc_active_aggregator != best_la) { |
648 | LACP_DPRINTF((NULL, "active aggregator changed\n" )); |
649 | LACP_DPRINTF((NULL, "old %s\n" , |
650 | lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, |
651 | buf, sizeof(buf)))); |
652 | } else { |
653 | LACP_DPRINTF((NULL, "active aggregator not changed\n" )); |
654 | } |
655 | LACP_DPRINTF((NULL, "new %s\n" , |
656 | lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); |
657 | #endif /* defined(LACP_DEBUG) */ |
658 | |
659 | if (lsc->lsc_active_aggregator != best_la) { |
660 | lsc->lsc_active_aggregator = best_la; |
661 | if (best_la) { |
662 | lacp_suppress_distributing(lsc, best_la); |
663 | } |
664 | } |
665 | } |
666 | |
667 | uint16_t |
668 | lacp_compose_key(struct lacp_port *lp) |
669 | { |
670 | u_int media = lp->lp_media; |
671 | uint16_t key; |
672 | |
673 | KASSERT(IFM_TYPE(media) == IFM_ETHER); |
674 | |
675 | if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { |
676 | |
677 | /* |
678 | * non-aggregatable links should have unique keys. |
679 | * |
680 | * XXX this isn't really unique as if_index is 16 bit. |
681 | */ |
682 | |
683 | /* bit 0..14: (some bits of) if_index of this port */ |
684 | key = lp->lp_agrport->port_ifp->if_index; |
685 | /* bit 15: 1 */ |
686 | key |= 0x8000; |
687 | } else { |
688 | u_int subtype = IFM_SUBTYPE(media); |
689 | |
690 | KASSERT((media & IFM_HDX) == 0); /* should be handled above */ |
691 | KASSERT((subtype & 0x1f) == subtype); |
692 | |
693 | /* bit 0..4: IFM_SUBTYPE */ |
694 | key = subtype; |
695 | /* bit 5..14: (some bits of) if_index of agr device */ |
696 | key |= 0x7fe0 & ((lp->lp_agrport->port_agrifp->if_index) << 5); |
697 | /* bit 15: 0 */ |
698 | } |
699 | |
700 | return htobe16(key); |
701 | } |
702 | |