FreeBSD/Linux Kernel Cross Reference
sys/net/if_lagg.c
1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
2
3 /*
4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/cdefs.h>
21 __FBSDID("$FreeBSD$");
22
23 #include "opt_inet.h"
24 #include "opt_inet6.h"
25
26 #include <sys/param.h>
27 #include <sys/kernel.h>
28 #include <sys/malloc.h>
29 #include <sys/mbuf.h>
30 #include <sys/queue.h>
31 #include <sys/socket.h>
32 #include <sys/sockio.h>
33 #include <sys/sysctl.h>
34 #include <sys/module.h>
35 #include <sys/priv.h>
36 #include <sys/systm.h>
37 #include <sys/proc.h>
38 #include <sys/hash.h>
39 #include <sys/lock.h>
40 #include <sys/rwlock.h>
41 #include <sys/taskqueue.h>
42
43 #include <net/ethernet.h>
44 #include <net/if.h>
45 #include <net/if_clone.h>
46 #include <net/if_arp.h>
47 #include <net/if_dl.h>
48 #include <net/if_llc.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 #include <net/if_var.h>
52 #include <net/bpf.h>
53
54 #ifdef INET
55 #include <netinet/in.h>
56 #include <netinet/in_systm.h>
57 #include <netinet/if_ether.h>
58 #include <netinet/ip.h>
59 #endif
60
61 #ifdef INET6
62 #include <netinet/ip6.h>
63 #endif
64
65 #include <net/if_vlan_var.h>
66 #include <net/if_lagg.h>
67 #include <net/ieee8023ad_lacp.h>
68
69 /* Special flags we should propagate to the lagg ports. */
70 static struct {
71 int flag;
72 int (*func)(struct ifnet *, int);
73 } lagg_pflags[] = {
74 {IFF_PROMISC, ifpromisc},
75 {IFF_ALLMULTI, if_allmulti},
76 {0, NULL}
77 };
78
79 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */
80 static struct mtx lagg_list_mtx;
81 eventhandler_tag lagg_detach_cookie = NULL;
82
83 static int lagg_clone_create(struct if_clone *, int, caddr_t);
84 static void lagg_clone_destroy(struct ifnet *);
85 static void lagg_lladdr(struct lagg_softc *, uint8_t *);
86 static void lagg_capabilities(struct lagg_softc *);
87 static void lagg_port_lladdr(struct lagg_port *, uint8_t *);
88 static void lagg_port_setlladdr(void *, int);
89 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
90 static int lagg_port_destroy(struct lagg_port *, int);
91 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
92 static void lagg_linkstate(struct lagg_softc *);
93 static void lagg_port_state(struct ifnet *, int);
94 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
95 static int lagg_port_output(struct ifnet *, struct mbuf *,
96 struct sockaddr *, struct rtentry *);
97 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
98 static int lagg_port_checkstacking(struct lagg_softc *);
99 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
100 static void lagg_init(void *);
101 static void lagg_stop(struct lagg_softc *);
102 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
103 static int lagg_ether_setmulti(struct lagg_softc *);
104 static int lagg_ether_cmdmulti(struct lagg_port *, int);
105 static int lagg_setflag(struct lagg_port *, int, int,
106 int (*func)(struct ifnet *, int));
107 static int lagg_setflags(struct lagg_port *, int status);
108 static void lagg_start(struct ifnet *);
109 static int lagg_media_change(struct ifnet *);
110 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
111 static struct lagg_port *lagg_link_active(struct lagg_softc *,
112 struct lagg_port *);
113 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *);
114
115 IFC_SIMPLE_DECLARE(lagg, 0);
116
117 /* Simple round robin */
118 static int lagg_rr_attach(struct lagg_softc *);
119 static int lagg_rr_detach(struct lagg_softc *);
120 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
121 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
122 struct mbuf *);
123
124 /* Active failover */
125 static int lagg_fail_attach(struct lagg_softc *);
126 static int lagg_fail_detach(struct lagg_softc *);
127 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
128 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
129 struct mbuf *);
130
131 /* Loadbalancing */
132 static int lagg_lb_attach(struct lagg_softc *);
133 static int lagg_lb_detach(struct lagg_softc *);
134 static int lagg_lb_port_create(struct lagg_port *);
135 static void lagg_lb_port_destroy(struct lagg_port *);
136 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
137 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
138 struct mbuf *);
139 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
140
141 /* 802.3ad LACP */
142 static int lagg_lacp_attach(struct lagg_softc *);
143 static int lagg_lacp_detach(struct lagg_softc *);
144 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
145 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
146 struct mbuf *);
147 static void lagg_lacp_lladdr(struct lagg_softc *);
148
149 /* lagg protocol table */
150 static const struct {
151 int ti_proto;
152 int (*ti_attach)(struct lagg_softc *);
153 } lagg_protos[] = {
154 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach },
155 { LAGG_PROTO_FAILOVER, lagg_fail_attach },
156 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach },
157 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach },
158 { LAGG_PROTO_LACP, lagg_lacp_attach },
159 { LAGG_PROTO_NONE, NULL }
160 };
161
162 static int
163 lagg_modevent(module_t mod, int type, void *data)
164 {
165
166 switch (type) {
167 case MOD_LOAD:
168 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF);
169 SLIST_INIT(&lagg_list);
170 if_clone_attach(&lagg_cloner);
171 lagg_input_p = lagg_input;
172 lagg_linkstate_p = lagg_port_state;
173 lagg_detach_cookie = EVENTHANDLER_REGISTER(
174 ifnet_departure_event, lagg_port_ifdetach, NULL,
175 EVENTHANDLER_PRI_ANY);
176 break;
177 case MOD_UNLOAD:
178 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
179 lagg_detach_cookie);
180 if_clone_detach(&lagg_cloner);
181 lagg_input_p = NULL;
182 lagg_linkstate_p = NULL;
183 mtx_destroy(&lagg_list_mtx);
184 break;
185 default:
186 return (EOPNOTSUPP);
187 }
188 return (0);
189 }
190
191 static moduledata_t lagg_mod = {
192 "if_lagg",
193 lagg_modevent,
194 0
195 };
196
197 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
198
199 static int
200 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
201 {
202 struct lagg_softc *sc;
203 struct ifnet *ifp;
204 int i, error = 0;
205 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
206
207 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
208 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
209 if (ifp == NULL) {
210 free(sc, M_DEVBUF);
211 return (ENOSPC);
212 }
213
214 sc->sc_proto = LAGG_PROTO_NONE;
215 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) {
216 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) {
217 sc->sc_proto = lagg_protos[i].ti_proto;
218 if ((error = lagg_protos[i].ti_attach(sc)) != 0) {
219 if_free_type(ifp, IFT_ETHER);
220 free(sc, M_DEVBUF);
221 return (error);
222 }
223 break;
224 }
225 }
226 LAGG_LOCK_INIT(sc);
227 SLIST_INIT(&sc->sc_ports);
228 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
229
230 /* Initialise pseudo media types */
231 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
232 lagg_media_status);
233 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
234 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
235
236 if_initname(ifp, ifc->ifc_name, unit);
237 ifp->if_type = IFT_ETHER;
238 ifp->if_softc = sc;
239 ifp->if_start = lagg_start;
240 ifp->if_init = lagg_init;
241 ifp->if_ioctl = lagg_ioctl;
242 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
243
244 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
245 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
246 IFQ_SET_READY(&ifp->if_snd);
247
248 /*
249 * Attach as an ordinary ethernet device, childs will be attached
250 * as special device IFT_IEEE8023ADLAG.
251 */
252 ether_ifattach(ifp, eaddr);
253
254 /* Insert into the global list of laggs */
255 mtx_lock(&lagg_list_mtx);
256 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries);
257 mtx_unlock(&lagg_list_mtx);
258
259 return (0);
260 }
261
262 static void
263 lagg_clone_destroy(struct ifnet *ifp)
264 {
265 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
266 struct lagg_port *lp;
267
268 LAGG_WLOCK(sc);
269
270 lagg_stop(sc);
271 ifp->if_flags &= ~IFF_UP;
272
273 /* Shutdown and remove lagg ports */
274 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
275 lagg_port_destroy(lp, 1);
276 /* Unhook the aggregation protocol */
277 (*sc->sc_detach)(sc);
278
279 LAGG_WUNLOCK(sc);
280
281 ifmedia_removeall(&sc->sc_media);
282 ether_ifdetach(ifp);
283 if_free_type(ifp, IFT_ETHER);
284
285 mtx_lock(&lagg_list_mtx);
286 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries);
287 mtx_unlock(&lagg_list_mtx);
288
289 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
290 LAGG_LOCK_DESTROY(sc);
291 free(sc, M_DEVBUF);
292 }
293
294 static void
295 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
296 {
297 struct ifnet *ifp = sc->sc_ifp;
298
299 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
300 return;
301
302 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
303 /* Let the protocol know the MAC has changed */
304 if (sc->sc_lladdr != NULL)
305 (*sc->sc_lladdr)(sc);
306 }
307
308 static void
309 lagg_capabilities(struct lagg_softc *sc)
310 {
311 struct lagg_port *lp;
312 int cap = ~0, ena = ~0;
313
314 LAGG_WLOCK_ASSERT(sc);
315
316 /* Get capabilities from the lagg ports */
317 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
318 cap &= lp->lp_ifp->if_capabilities;
319 ena &= lp->lp_ifp->if_capenable;
320 }
321 cap = (cap == ~0 ? 0 : cap);
322 ena = (ena == ~0 ? 0 : ena);
323
324 if (sc->sc_ifp->if_capabilities != cap ||
325 sc->sc_ifp->if_capenable != ena) {
326 sc->sc_ifp->if_capabilities = cap;
327 sc->sc_ifp->if_capenable = ena;
328 getmicrotime(&sc->sc_ifp->if_lastchange);
329
330 if (sc->sc_ifflags & IFF_DEBUG)
331 if_printf(sc->sc_ifp,
332 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
333 }
334 }
335
336 static void
337 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr)
338 {
339 struct lagg_softc *sc = lp->lp_softc;
340 struct ifnet *ifp = lp->lp_ifp;
341 struct lagg_llq *llq;
342 int pending = 0;
343
344 LAGG_WLOCK_ASSERT(sc);
345
346 if (lp->lp_detaching ||
347 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
348 return;
349
350 /* Check to make sure its not already queued to be changed */
351 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
352 if (llq->llq_ifp == ifp) {
353 pending = 1;
354 break;
355 }
356 }
357
358 if (!pending) {
359 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT);
360 if (llq == NULL) /* XXX what to do */
361 return;
362 }
363
364 /* Update the lladdr even if pending, it may have changed */
365 llq->llq_ifp = ifp;
366 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
367
368 if (!pending)
369 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
370
371 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
372 }
373
374 /*
375 * Set the interface MAC address from a taskqueue to avoid a LOR.
376 */
377 static void
378 lagg_port_setlladdr(void *arg, int pending)
379 {
380 struct lagg_softc *sc = (struct lagg_softc *)arg;
381 struct lagg_llq *llq, *head;
382 struct ifnet *ifp;
383 int error;
384
385 /* Grab a local reference of the queue and remove it from the softc */
386 LAGG_WLOCK(sc);
387 head = SLIST_FIRST(&sc->sc_llq_head);
388 SLIST_FIRST(&sc->sc_llq_head) = NULL;
389 LAGG_WUNLOCK(sc);
390
391 /*
392 * Traverse the queue and set the lladdr on each ifp. It is safe to do
393 * unlocked as we have the only reference to it.
394 */
395 for (llq = head; llq != NULL; llq = head) {
396 ifp = llq->llq_ifp;
397
398 /* Set the link layer address */
399 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN);
400 if (error)
401 printf("%s: setlladdr failed on %s\n", __func__,
402 ifp->if_xname);
403
404 head = SLIST_NEXT(llq, llq_entries);
405 free(llq, M_DEVBUF);
406 }
407 }
408
409 static int
410 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
411 {
412 struct lagg_softc *sc_ptr;
413 struct lagg_port *lp;
414 int error = 0;
415
416 LAGG_WLOCK_ASSERT(sc);
417
418 /* Limit the maximal number of lagg ports */
419 if (sc->sc_count >= LAGG_MAX_PORTS)
420 return (ENOSPC);
421
422 /* New lagg port has to be in an idle state */
423 if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
424 return (EBUSY);
425
426 /* Check if port has already been associated to a lagg */
427 if (ifp->if_lagg != NULL)
428 return (EBUSY);
429
430 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
431 if (ifp->if_type != IFT_ETHER)
432 return (EPROTONOSUPPORT);
433
434 /* Allow the first Ethernet member to define the MTU */
435 if (SLIST_EMPTY(&sc->sc_ports))
436 sc->sc_ifp->if_mtu = ifp->if_mtu;
437 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
438 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
439 ifp->if_xname);
440 return (EINVAL);
441 }
442
443 if ((lp = malloc(sizeof(struct lagg_port),
444 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
445 return (ENOMEM);
446
447 /* Check if port is a stacked lagg */
448 mtx_lock(&lagg_list_mtx);
449 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) {
450 if (ifp == sc_ptr->sc_ifp) {
451 mtx_unlock(&lagg_list_mtx);
452 free(lp, M_DEVBUF);
453 return (EINVAL);
454 /* XXX disable stacking for the moment, its untested
455 lp->lp_flags |= LAGG_PORT_STACK;
456 if (lagg_port_checkstacking(sc_ptr) >=
457 LAGG_MAX_STACKING) {
458 mtx_unlock(&lagg_list_mtx);
459 free(lp, M_DEVBUF);
460 return (E2BIG);
461 }
462 */
463 }
464 }
465 mtx_unlock(&lagg_list_mtx);
466
467 /* Change the interface type */
468 lp->lp_iftype = ifp->if_type;
469 ifp->if_type = IFT_IEEE8023ADLAG;
470 ifp->if_lagg = lp;
471 lp->lp_ioctl = ifp->if_ioctl;
472 ifp->if_ioctl = lagg_port_ioctl;
473 lp->lp_output = ifp->if_output;
474 ifp->if_output = lagg_port_output;
475
476 lp->lp_ifp = ifp;
477 lp->lp_softc = sc;
478
479 /* Save port link layer address */
480 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
481
482 if (SLIST_EMPTY(&sc->sc_ports)) {
483 sc->sc_primary = lp;
484 lagg_lladdr(sc, IF_LLADDR(ifp));
485 } else {
486 /* Update link layer address for this port */
487 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp));
488 }
489
490 /* Insert into the list of ports */
491 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
492 sc->sc_count++;
493
494 /* Update lagg capabilities */
495 lagg_capabilities(sc);
496 lagg_linkstate(sc);
497
498 /* Add multicast addresses and interface flags to this port */
499 lagg_ether_cmdmulti(lp, 1);
500 lagg_setflags(lp, 1);
501
502 if (sc->sc_port_create != NULL)
503 error = (*sc->sc_port_create)(lp);
504 if (error) {
505 /* remove the port again, without calling sc_port_destroy */
506 lagg_port_destroy(lp, 0);
507 return (error);
508 }
509
510 return (error);
511 }
512
513 static int
514 lagg_port_checkstacking(struct lagg_softc *sc)
515 {
516 struct lagg_softc *sc_ptr;
517 struct lagg_port *lp;
518 int m = 0;
519
520 LAGG_WLOCK_ASSERT(sc);
521
522 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
523 if (lp->lp_flags & LAGG_PORT_STACK) {
524 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
525 m = MAX(m, lagg_port_checkstacking(sc_ptr));
526 }
527 }
528
529 return (m + 1);
530 }
531
532 static int
533 lagg_port_destroy(struct lagg_port *lp, int runpd)
534 {
535 struct lagg_softc *sc = lp->lp_softc;
536 struct lagg_port *lp_ptr;
537 struct lagg_llq *llq;
538 struct ifnet *ifp = lp->lp_ifp;
539
540 LAGG_WLOCK_ASSERT(sc);
541
542 if (runpd && sc->sc_port_destroy != NULL)
543 (*sc->sc_port_destroy)(lp);
544
545 /*
546 * Remove multicast addresses and interface flags from this port and
547 * reset the MAC address, skip if the interface is being detached.
548 */
549 if (!lp->lp_detaching) {
550 lagg_ether_cmdmulti(lp, 0);
551 lagg_setflags(lp, 0);
552 lagg_port_lladdr(lp, lp->lp_lladdr);
553 }
554
555 /* Restore interface */
556 ifp->if_type = lp->lp_iftype;
557 ifp->if_ioctl = lp->lp_ioctl;
558 ifp->if_output = lp->lp_output;
559 ifp->if_lagg = NULL;
560
561 /* Finally, remove the port from the lagg */
562 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
563 sc->sc_count--;
564
565 /* Update the primary interface */
566 if (lp == sc->sc_primary) {
567 uint8_t lladdr[ETHER_ADDR_LEN];
568
569 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) {
570 bzero(&lladdr, ETHER_ADDR_LEN);
571 } else {
572 bcopy(lp_ptr->lp_lladdr,
573 lladdr, ETHER_ADDR_LEN);
574 }
575 lagg_lladdr(sc, lladdr);
576 sc->sc_primary = lp_ptr;
577
578 /* Update link layer address for each port */
579 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
580 lagg_port_lladdr(lp_ptr, lladdr);
581 }
582
583 /* Remove any pending lladdr changes from the queue */
584 if (lp->lp_detaching) {
585 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
586 if (llq->llq_ifp == ifp) {
587 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
588 llq_entries);
589 free(llq, M_DEVBUF);
590 break; /* Only appears once */
591 }
592 }
593 }
594
595 if (lp->lp_ifflags)
596 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
597
598 free(lp, M_DEVBUF);
599
600 /* Update lagg capabilities */
601 lagg_capabilities(sc);
602 lagg_linkstate(sc);
603
604 return (0);
605 }
606
607 static int
608 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
609 {
610 struct lagg_reqport *rp = (struct lagg_reqport *)data;
611 struct lagg_softc *sc;
612 struct lagg_port *lp = NULL;
613 int error = 0;
614
615 /* Should be checked by the caller */
616 if (ifp->if_type != IFT_IEEE8023ADLAG ||
617 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
618 goto fallback;
619
620 switch (cmd) {
621 case SIOCGLAGGPORT:
622 if (rp->rp_portname[0] == '\0' ||
623 ifunit(rp->rp_portname) != ifp) {
624 error = EINVAL;
625 break;
626 }
627
628 LAGG_RLOCK(sc);
629 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
630 error = ENOENT;
631 LAGG_RUNLOCK(sc);
632 break;
633 }
634
635 lagg_port2req(lp, rp);
636 LAGG_RUNLOCK(sc);
637 break;
638
639 case SIOCSIFCAP:
640 if (lp->lp_ioctl == NULL) {
641 error = EINVAL;
642 break;
643 }
644 error = (*lp->lp_ioctl)(ifp, cmd, data);
645 if (error)
646 break;
647
648 /* Update lagg interface capabilities */
649 LAGG_WLOCK(sc);
650 lagg_capabilities(sc);
651 LAGG_WUNLOCK(sc);
652 break;
653
654 case SIOCSIFMTU:
655 /* Do not allow the MTU to be changed once joined */
656 error = EINVAL;
657 break;
658
659 default:
660 goto fallback;
661 }
662
663 return (error);
664
665 fallback:
666 if (lp->lp_ioctl != NULL)
667 return ((*lp->lp_ioctl)(ifp, cmd, data));
668
669 return (EINVAL);
670 }
671
672 static int
673 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
674 struct sockaddr *dst, struct rtentry *rt0)
675 {
676 struct lagg_port *lp = ifp->if_lagg;
677 struct ether_header *eh;
678 short type = 0;
679
680 switch (dst->sa_family) {
681 case pseudo_AF_HDRCMPLT:
682 case AF_UNSPEC:
683 eh = (struct ether_header *)dst->sa_data;
684 type = eh->ether_type;
685 break;
686 }
687
688 /*
689 * Only allow ethernet types required to initiate or maintain the link,
690 * aggregated frames take a different path.
691 */
692 switch (ntohs(type)) {
693 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */
694 return ((*lp->lp_output)(ifp, m, dst, rt0));
695 }
696
697 /* drop any other frames */
698 m_freem(m);
699 return (EBUSY);
700 }
701
702 static void
703 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
704 {
705 struct lagg_port *lp;
706 struct lagg_softc *sc;
707
708 if ((lp = ifp->if_lagg) == NULL)
709 return;
710
711 sc = lp->lp_softc;
712
713 LAGG_WLOCK(sc);
714 lp->lp_detaching = 1;
715 lagg_port_destroy(lp, 1);
716 LAGG_WUNLOCK(sc);
717 }
718
719 static void
720 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
721 {
722 struct lagg_softc *sc = lp->lp_softc;
723
724 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
725 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
726 rp->rp_prio = lp->lp_prio;
727 rp->rp_flags = lp->lp_flags;
728 if (sc->sc_portreq != NULL)
729 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc);
730
731 /* Add protocol specific flags */
732 switch (sc->sc_proto) {
733 case LAGG_PROTO_FAILOVER:
734 if (lp == sc->sc_primary)
735 rp->rp_flags |= LAGG_PORT_MASTER;
736 if (lp == lagg_link_active(sc, sc->sc_primary))
737 rp->rp_flags |= LAGG_PORT_ACTIVE;
738 break;
739
740 case LAGG_PROTO_ROUNDROBIN:
741 case LAGG_PROTO_LOADBALANCE:
742 case LAGG_PROTO_ETHERCHANNEL:
743 if (LAGG_PORTACTIVE(lp))
744 rp->rp_flags |= LAGG_PORT_ACTIVE;
745 break;
746
747 case LAGG_PROTO_LACP:
748 /* LACP has a different definition of active */
749 if (lacp_port_isactive(lp))
750 rp->rp_flags |= LAGG_PORT_ACTIVE;
751 break;
752 }
753
754 }
755
756 static void
757 lagg_init(void *xsc)
758 {
759 struct lagg_softc *sc = (struct lagg_softc *)xsc;
760 struct lagg_port *lp;
761 struct ifnet *ifp = sc->sc_ifp;
762
763 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
764 return;
765
766 LAGG_WLOCK(sc);
767
768 ifp->if_drv_flags |= IFF_DRV_RUNNING;
769 /* Update the port lladdrs */
770 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
771 lagg_port_lladdr(lp, IF_LLADDR(ifp));
772
773 if (sc->sc_init != NULL)
774 (*sc->sc_init)(sc);
775
776 LAGG_WUNLOCK(sc);
777 }
778
779 static void
780 lagg_stop(struct lagg_softc *sc)
781 {
782 struct ifnet *ifp = sc->sc_ifp;
783
784 LAGG_WLOCK_ASSERT(sc);
785
786 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
787 return;
788
789 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
790
791 if (sc->sc_stop != NULL)
792 (*sc->sc_stop)(sc);
793 }
794
795 static int
796 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
797 {
798 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
799 struct lagg_reqall *ra = (struct lagg_reqall *)data;
800 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
801 struct ifreq *ifr = (struct ifreq *)data;
802 struct lagg_port *lp;
803 struct ifnet *tpif;
804 struct thread *td = curthread;
805 char *buf, *outbuf;
806 int count, buflen, len, error = 0;
807
808 bzero(&rpbuf, sizeof(rpbuf));
809
810 switch (cmd) {
811 case SIOCGLAGG:
812 LAGG_RLOCK(sc);
813 count = 0;
814 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
815 count++;
816 buflen = count * sizeof(struct lagg_reqport);
817 LAGG_RUNLOCK(sc);
818
819 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
820
821 LAGG_RLOCK(sc);
822 ra->ra_proto = sc->sc_proto;
823 if (sc->sc_req != NULL)
824 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc);
825
826 count = 0;
827 buf = outbuf;
828 len = min(ra->ra_size, buflen);
829 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
830 if (len < sizeof(rpbuf))
831 break;
832
833 lagg_port2req(lp, &rpbuf);
834 memcpy(buf, &rpbuf, sizeof(rpbuf));
835 count++;
836 buf += sizeof(rpbuf);
837 len -= sizeof(rpbuf);
838 }
839 LAGG_RUNLOCK(sc);
840 ra->ra_ports = count;
841 ra->ra_size = count * sizeof(rpbuf);
842 error = copyout(outbuf, ra->ra_port, ra->ra_size);
843 free(outbuf, M_TEMP);
844 break;
845 case SIOCSLAGG:
846 error = priv_check(td, PRIV_NET_LAGG);
847 if (error)
848 break;
849 if (ra->ra_proto >= LAGG_PROTO_MAX) {
850 error = EPROTONOSUPPORT;
851 break;
852 }
853 if (sc->sc_proto != LAGG_PROTO_NONE) {
854 LAGG_WLOCK(sc);
855 error = sc->sc_detach(sc);
856 /* Reset protocol and pointers */
857 sc->sc_proto = LAGG_PROTO_NONE;
858 sc->sc_detach = NULL;
859 sc->sc_start = NULL;
860 sc->sc_input = NULL;
861 sc->sc_port_create = NULL;
862 sc->sc_port_destroy = NULL;
863 sc->sc_linkstate = NULL;
864 sc->sc_init = NULL;
865 sc->sc_stop = NULL;
866 sc->sc_lladdr = NULL;
867 sc->sc_req = NULL;
868 sc->sc_portreq = NULL;
869 LAGG_WUNLOCK(sc);
870 }
871 if (error != 0)
872 break;
873 for (int i = 0; i < (sizeof(lagg_protos) /
874 sizeof(lagg_protos[0])); i++) {
875 if (lagg_protos[i].ti_proto == ra->ra_proto) {
876 if (sc->sc_ifflags & IFF_DEBUG)
877 printf("%s: using proto %u\n",
878 sc->sc_ifname,
879 lagg_protos[i].ti_proto);
880 LAGG_WLOCK(sc);
881 sc->sc_proto = lagg_protos[i].ti_proto;
882 if (sc->sc_proto != LAGG_PROTO_NONE)
883 error = lagg_protos[i].ti_attach(sc);
884 LAGG_WUNLOCK(sc);
885 return (error);
886 }
887 }
888 error = EPROTONOSUPPORT;
889 break;
890 case SIOCGLAGGPORT:
891 if (rp->rp_portname[0] == '\0' ||
892 (tpif = ifunit(rp->rp_portname)) == NULL) {
893 error = EINVAL;
894 break;
895 }
896
897 LAGG_RLOCK(sc);
898 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
899 lp->lp_softc != sc) {
900 error = ENOENT;
901 LAGG_RUNLOCK(sc);
902 break;
903 }
904
905 lagg_port2req(lp, rp);
906 LAGG_RUNLOCK(sc);
907 break;
908 case SIOCSLAGGPORT:
909 error = priv_check(td, PRIV_NET_LAGG);
910 if (error)
911 break;
912 if (rp->rp_portname[0] == '\0' ||
913 (tpif = ifunit(rp->rp_portname)) == NULL) {
914 error = EINVAL;
915 break;
916 }
917 LAGG_WLOCK(sc);
918 error = lagg_port_create(sc, tpif);
919 LAGG_WUNLOCK(sc);
920 break;
921 case SIOCSLAGGDELPORT:
922 error = priv_check(td, PRIV_NET_LAGG);
923 if (error)
924 break;
925 if (rp->rp_portname[0] == '\0' ||
926 (tpif = ifunit(rp->rp_portname)) == NULL) {
927 error = EINVAL;
928 break;
929 }
930
931 LAGG_WLOCK(sc);
932 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
933 lp->lp_softc != sc) {
934 error = ENOENT;
935 LAGG_WUNLOCK(sc);
936 break;
937 }
938
939 error = lagg_port_destroy(lp, 1);
940 LAGG_WUNLOCK(sc);
941 break;
942 case SIOCSIFFLAGS:
943 /* Set flags on ports too */
944 LAGG_WLOCK(sc);
945 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
946 lagg_setflags(lp, 1);
947 }
948 LAGG_WUNLOCK(sc);
949
950 if (!(ifp->if_flags & IFF_UP) &&
951 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
952 /*
953 * If interface is marked down and it is running,
954 * then stop and disable it.
955 */
956 LAGG_WLOCK(sc);
957 lagg_stop(sc);
958 LAGG_WUNLOCK(sc);
959 } else if ((ifp->if_flags & IFF_UP) &&
960 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
961 /*
962 * If interface is marked up and it is stopped, then
963 * start it.
964 */
965 (*ifp->if_init)(sc);
966 }
967 break;
968 case SIOCADDMULTI:
969 case SIOCDELMULTI:
970 LAGG_WLOCK(sc);
971 error = lagg_ether_setmulti(sc);
972 LAGG_WUNLOCK(sc);
973 break;
974 case SIOCSIFMEDIA:
975 case SIOCGIFMEDIA:
976 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
977 break;
978
979 case SIOCSIFCAP:
980 case SIOCSIFMTU:
981 /* Do not allow the MTU or caps to be directly changed */
982 error = EINVAL;
983 break;
984
985 default:
986 error = ether_ioctl(ifp, cmd, data);
987 break;
988 }
989 return (error);
990 }
991
992 static int
993 lagg_ether_setmulti(struct lagg_softc *sc)
994 {
995 struct lagg_port *lp;
996
997 LAGG_WLOCK_ASSERT(sc);
998
999 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1000 /* First, remove any existing filter entries. */
1001 lagg_ether_cmdmulti(lp, 0);
1002 /* copy all addresses from the lagg interface to the port */
1003 lagg_ether_cmdmulti(lp, 1);
1004 }
1005 return (0);
1006 }
1007
1008 static int
1009 lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1010 {
1011 struct lagg_softc *sc = lp->lp_softc;
1012 struct ifnet *ifp = lp->lp_ifp;
1013 struct ifnet *scifp = sc->sc_ifp;
1014 struct lagg_mc *mc;
1015 struct ifmultiaddr *ifma, *rifma = NULL;
1016 struct sockaddr_dl sdl;
1017 int error;
1018
1019 LAGG_WLOCK_ASSERT(sc);
1020
1021 bzero((char *)&sdl, sizeof(sdl));
1022 sdl.sdl_len = sizeof(sdl);
1023 sdl.sdl_family = AF_LINK;
1024 sdl.sdl_type = IFT_ETHER;
1025 sdl.sdl_alen = ETHER_ADDR_LEN;
1026 sdl.sdl_index = ifp->if_index;
1027
1028 if (set) {
1029 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1030 if (ifma->ifma_addr->sa_family != AF_LINK)
1031 continue;
1032 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
1033 LLADDR(&sdl), ETHER_ADDR_LEN);
1034
1035 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
1036 if (error)
1037 return (error);
1038 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1039 if (mc == NULL)
1040 return (ENOMEM);
1041 mc->mc_ifma = rifma;
1042 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1043 }
1044 } else {
1045 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1046 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1047 if_delmulti_ifma(mc->mc_ifma);
1048 free(mc, M_DEVBUF);
1049 }
1050 }
1051 return (0);
1052 }
1053
1054 /* Handle a ref counted flag that should be set on the lagg port as well */
1055 static int
1056 lagg_setflag(struct lagg_port *lp, int flag, int status,
1057 int (*func)(struct ifnet *, int))
1058 {
1059 struct lagg_softc *sc = lp->lp_softc;
1060 struct ifnet *scifp = sc->sc_ifp;
1061 struct ifnet *ifp = lp->lp_ifp;
1062 int error;
1063
1064 LAGG_WLOCK_ASSERT(sc);
1065
1066 status = status ? (scifp->if_flags & flag) : 0;
1067 /* Now "status" contains the flag value or 0 */
1068
1069 /*
1070 * See if recorded ports status is different from what
1071 * we want it to be. If it is, flip it. We record ports
1072 * status in lp_ifflags so that we won't clear ports flag
1073 * we haven't set. In fact, we don't clear or set ports
1074 * flags directly, but get or release references to them.
1075 * That's why we can be sure that recorded flags still are
1076 * in accord with actual ports flags.
1077 */
1078 if (status != (lp->lp_ifflags & flag)) {
1079 error = (*func)(ifp, status);
1080 if (error)
1081 return (error);
1082 lp->lp_ifflags &= ~flag;
1083 lp->lp_ifflags |= status;
1084 }
1085 return (0);
1086 }
1087
1088 /*
1089 * Handle IFF_* flags that require certain changes on the lagg port
1090 * if "status" is true, update ports flags respective to the lagg
1091 * if "status" is false, forcedly clear the flags set on port.
1092 */
1093 static int
1094 lagg_setflags(struct lagg_port *lp, int status)
1095 {
1096 int error, i;
1097
1098 for (i = 0; lagg_pflags[i].flag; i++) {
1099 error = lagg_setflag(lp, lagg_pflags[i].flag,
1100 status, lagg_pflags[i].func);
1101 if (error)
1102 return (error);
1103 }
1104 return (0);
1105 }
1106
1107 static void
1108 lagg_start(struct ifnet *ifp)
1109 {
1110 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1111 struct mbuf *m;
1112 int error = 0;
1113
1114 LAGG_RLOCK(sc);
1115 for (;; error = 0) {
1116 IFQ_DEQUEUE(&ifp->if_snd, m);
1117 if (m == NULL)
1118 break;
1119
1120 ETHER_BPF_MTAP(ifp, m);
1121
1122 if (sc->sc_proto != LAGG_PROTO_NONE)
1123 error = (*sc->sc_start)(sc, m);
1124 else
1125 m_freem(m);
1126
1127 if (error == 0)
1128 ifp->if_opackets++;
1129 else
1130 ifp->if_oerrors++;
1131 }
1132 LAGG_RUNLOCK(sc);
1133
1134 return;
1135 }
1136
1137 static struct mbuf *
1138 lagg_input(struct ifnet *ifp, struct mbuf *m)
1139 {
1140 struct lagg_port *lp = ifp->if_lagg;
1141 struct lagg_softc *sc = lp->lp_softc;
1142 struct ifnet *scifp = sc->sc_ifp;
1143
1144 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1145 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1146 sc->sc_proto == LAGG_PROTO_NONE) {
1147 m_freem(m);
1148 return (NULL);
1149 }
1150
1151 LAGG_RLOCK(sc);
1152 ETHER_BPF_MTAP(scifp, m);
1153
1154 m = (*sc->sc_input)(sc, lp, m);
1155
1156 if (m != NULL) {
1157 scifp->if_ipackets++;
1158 scifp->if_ibytes += m->m_pkthdr.len;
1159
1160 if (scifp->if_flags & IFF_MONITOR) {
1161 m_freem(m);
1162 m = NULL;
1163 }
1164 }
1165
1166 LAGG_RUNLOCK(sc);
1167 return (m);
1168 }
1169
1170 static int
1171 lagg_media_change(struct ifnet *ifp)
1172 {
1173 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1174
1175 if (sc->sc_ifflags & IFF_DEBUG)
1176 printf("%s\n", __func__);
1177
1178 /* Ignore */
1179 return (0);
1180 }
1181
1182 static void
1183 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1184 {
1185 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1186 struct lagg_port *lp;
1187
1188 imr->ifm_status = IFM_AVALID;
1189 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1190
1191 LAGG_RLOCK(sc);
1192 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1193 if (LAGG_PORTACTIVE(lp))
1194 imr->ifm_status |= IFM_ACTIVE;
1195 }
1196 LAGG_RUNLOCK(sc);
1197 }
1198
1199 static void
1200 lagg_linkstate(struct lagg_softc *sc)
1201 {
1202 struct lagg_port *lp;
1203 int new_link = LINK_STATE_DOWN;
1204
1205 /* Our link is considered up if at least one of our ports is active */
1206 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1207 if (lp->lp_link_state == LINK_STATE_UP) {
1208 new_link = LINK_STATE_UP;
1209 break;
1210 }
1211 }
1212 if_link_state_change(sc->sc_ifp, new_link);
1213 }
1214
1215 static void
1216 lagg_port_state(struct ifnet *ifp, int state)
1217 {
1218 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1219 struct lagg_softc *sc = NULL;
1220
1221 if (lp != NULL)
1222 sc = lp->lp_softc;
1223 if (sc == NULL)
1224 return;
1225
1226 LAGG_WLOCK(sc);
1227 lagg_linkstate(sc);
1228 if (sc->sc_linkstate != NULL)
1229 (*sc->sc_linkstate)(lp);
1230 LAGG_WUNLOCK(sc);
1231 }
1232
1233 struct lagg_port *
1234 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1235 {
1236 struct lagg_port *lp_next, *rval = NULL;
1237 // int new_link = LINK_STATE_DOWN;
1238
1239 LAGG_RLOCK_ASSERT(sc);
1240 /*
1241 * Search a port which reports an active link state.
1242 */
1243
1244 if (lp == NULL)
1245 goto search;
1246 if (LAGG_PORTACTIVE(lp)) {
1247 rval = lp;
1248 goto found;
1249 }
1250 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1251 LAGG_PORTACTIVE(lp_next)) {
1252 rval = lp_next;
1253 goto found;
1254 }
1255
1256 search:
1257 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1258 if (LAGG_PORTACTIVE(lp_next)) {
1259 rval = lp_next;
1260 goto found;
1261 }
1262 }
1263
1264 found:
1265 if (rval != NULL) {
1266 /*
1267 * The IEEE 802.1D standard assumes that a lagg with
1268 * multiple ports is always full duplex. This is valid
1269 * for load sharing laggs and if at least two links
1270 * are active. Unfortunately, checking the latter would
1271 * be too expensive at this point.
1272 XXX
1273 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1274 (sc->sc_count > 1))
1275 new_link = LINK_STATE_FULL_DUPLEX;
1276 else
1277 new_link = rval->lp_link_state;
1278 */
1279 }
1280
1281 return (rval);
1282 }
1283
1284 static const void *
1285 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf)
1286 {
1287 if (m->m_pkthdr.len < (off + len)) {
1288 return (NULL);
1289 } else if (m->m_len < (off + len)) {
1290 m_copydata(m, off, len, buf);
1291 return (buf);
1292 }
1293 return (mtod(m, char *) + off);
1294 }
1295
1296 uint32_t
1297 lagg_hashmbuf(struct mbuf *m, uint32_t key)
1298 {
1299 uint16_t etype;
1300 uint32_t p = 0;
1301 int off;
1302 struct ether_header *eh;
1303 struct ether_vlan_header vlanbuf;
1304 const struct ether_vlan_header *vlan;
1305 #ifdef INET
1306 const struct ip *ip;
1307 struct ip ipbuf;
1308 #endif
1309 #ifdef INET6
1310 const struct ip6_hdr *ip6;
1311 struct ip6_hdr ip6buf;
1312 uint32_t flow;
1313 #endif
1314
1315 off = sizeof(*eh);
1316 if (m->m_len < off)
1317 goto out;
1318 eh = mtod(m, struct ether_header *);
1319 etype = ntohs(eh->ether_type);
1320 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key);
1321 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p);
1322
1323 /* Special handling for encapsulating VLAN frames */
1324 if (m->m_flags & M_VLANTAG) {
1325 p = hash32_buf(&m->m_pkthdr.ether_vtag,
1326 sizeof(m->m_pkthdr.ether_vtag), p);
1327 } else if (etype == ETHERTYPE_VLAN) {
1328 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf);
1329 if (vlan == NULL)
1330 goto out;
1331
1332 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p);
1333 etype = ntohs(vlan->evl_proto);
1334 off += sizeof(*vlan) - sizeof(*eh);
1335 }
1336
1337 switch (etype) {
1338 #ifdef INET
1339 case ETHERTYPE_IP:
1340 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf);
1341 if (ip == NULL)
1342 goto out;
1343
1344 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p);
1345 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p);
1346 break;
1347 #endif
1348 #ifdef INET6
1349 case ETHERTYPE_IPV6:
1350 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf);
1351 if (ip6 == NULL)
1352 goto out;
1353
1354 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p);
1355 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p);
1356 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
1357 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */
1358 break;
1359 #endif
1360 }
1361 out:
1362 return (p);
1363 }
1364
1365 int
1366 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1367 {
1368 int error = 0;
1369
1370 IFQ_HANDOFF(ifp, m, error);
1371 if (error)
1372 ifp->if_oerrors++;
1373 return (error);
1374 }
1375
1376 /*
1377 * Simple round robin aggregation
1378 */
1379
1380 static int
1381 lagg_rr_attach(struct lagg_softc *sc)
1382 {
1383 sc->sc_detach = lagg_rr_detach;
1384 sc->sc_start = lagg_rr_start;
1385 sc->sc_input = lagg_rr_input;
1386 sc->sc_port_create = NULL;
1387 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1388 sc->sc_seq = 0;
1389
1390 return (0);
1391 }
1392
1393 static int
1394 lagg_rr_detach(struct lagg_softc *sc)
1395 {
1396 return (0);
1397 }
1398
1399 static int
1400 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1401 {
1402 struct lagg_port *lp;
1403 uint32_t p;
1404
1405 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1406 p %= sc->sc_count;
1407 lp = SLIST_FIRST(&sc->sc_ports);
1408 while (p--)
1409 lp = SLIST_NEXT(lp, lp_entries);
1410
1411 /*
1412 * Check the port's link state. This will return the next active
1413 * port if the link is down or the port is NULL.
1414 */
1415 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1416 m_freem(m);
1417 return (ENOENT);
1418 }
1419
1420 /* Send mbuf */
1421 return (lagg_enqueue(lp->lp_ifp, m));
1422 }
1423
1424 static struct mbuf *
1425 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1426 {
1427 struct ifnet *ifp = sc->sc_ifp;
1428
1429 /* Just pass in the packet to our lagg device */
1430 m->m_pkthdr.rcvif = ifp;
1431
1432 return (m);
1433 }
1434
1435 /*
1436 * Active failover
1437 */
1438
1439 static int
1440 lagg_fail_attach(struct lagg_softc *sc)
1441 {
1442 sc->sc_detach = lagg_fail_detach;
1443 sc->sc_start = lagg_fail_start;
1444 sc->sc_input = lagg_fail_input;
1445 sc->sc_port_create = NULL;
1446 sc->sc_port_destroy = NULL;
1447
1448 return (0);
1449 }
1450
1451 static int
1452 lagg_fail_detach(struct lagg_softc *sc)
1453 {
1454 return (0);
1455 }
1456
1457 static int
1458 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
1459 {
1460 struct lagg_port *lp;
1461
1462 /* Use the master port if active or the next available port */
1463 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
1464 m_freem(m);
1465 return (ENOENT);
1466 }
1467
1468 /* Send mbuf */
1469 return (lagg_enqueue(lp->lp_ifp, m));
1470 }
1471
1472 static struct mbuf *
1473 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1474 {
1475 struct ifnet *ifp = sc->sc_ifp;
1476 struct lagg_port *tmp_tp;
1477
1478 if (lp == sc->sc_primary) {
1479 m->m_pkthdr.rcvif = ifp;
1480 return (m);
1481 }
1482
1483 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
1484 tmp_tp = lagg_link_active(sc, sc->sc_primary);
1485 /*
1486 * If tmp_tp is null, we've recieved a packet when all
1487 * our links are down. Weird, but process it anyways.
1488 */
1489 if ((tmp_tp == NULL || tmp_tp == lp)) {
1490 m->m_pkthdr.rcvif = ifp;
1491 return (m);
1492 }
1493 }
1494
1495 m_freem(m);
1496 return (NULL);
1497 }
1498
1499 /*
1500 * Loadbalancing
1501 */
1502
1503 static int
1504 lagg_lb_attach(struct lagg_softc *sc)
1505 {
1506 struct lagg_port *lp;
1507 struct lagg_lb *lb;
1508
1509 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb),
1510 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
1511 return (ENOMEM);
1512
1513 sc->sc_detach = lagg_lb_detach;
1514 sc->sc_start = lagg_lb_start;
1515 sc->sc_input = lagg_lb_input;
1516 sc->sc_port_create = lagg_lb_port_create;
1517 sc->sc_port_destroy = lagg_lb_port_destroy;
1518 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1519
1520 lb->lb_key = arc4random();
1521 sc->sc_psc = (caddr_t)lb;
1522
1523 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1524 lagg_lb_port_create(lp);
1525
1526 return (0);
1527 }
1528
1529 static int
1530 lagg_lb_detach(struct lagg_softc *sc)
1531 {
1532 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1533 if (lb != NULL)
1534 free(lb, M_DEVBUF);
1535 return (0);
1536 }
1537
1538 static int
1539 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
1540 {
1541 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1542 struct lagg_port *lp_next;
1543 int i = 0;
1544
1545 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
1546 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1547 if (lp_next == lp)
1548 continue;
1549 if (i >= LAGG_MAX_PORTS)
1550 return (EINVAL);
1551 if (sc->sc_ifflags & IFF_DEBUG)
1552 printf("%s: port %s at index %d\n",
1553 sc->sc_ifname, lp_next->lp_ifname, i);
1554 lb->lb_ports[i++] = lp_next;
1555 }
1556
1557 return (0);
1558 }
1559
1560 static int
1561 lagg_lb_port_create(struct lagg_port *lp)
1562 {
1563 struct lagg_softc *sc = lp->lp_softc;
1564 return (lagg_lb_porttable(sc, NULL));
1565 }
1566
1567 static void
1568 lagg_lb_port_destroy(struct lagg_port *lp)
1569 {
1570 struct lagg_softc *sc = lp->lp_softc;
1571 lagg_lb_porttable(sc, lp);
1572 }
1573
1574 static int
1575 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
1576 {
1577 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1578 struct lagg_port *lp = NULL;
1579 uint32_t p = 0;
1580 int idx;
1581
1582 p = lagg_hashmbuf(m, lb->lb_key);
1583 if ((idx = p % sc->sc_count) >= LAGG_MAX_PORTS) {
1584 m_freem(m);
1585 return (EINVAL);
1586 }
1587 lp = lb->lb_ports[idx];
1588
1589 /*
1590 * Check the port's link state. This will return the next active
1591 * port if the link is down or the port is NULL.
1592 */
1593 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1594 m_freem(m);
1595 return (ENOENT);
1596 }
1597
1598 /* Send mbuf */
1599 return (lagg_enqueue(lp->lp_ifp, m));
1600 }
1601
1602 static struct mbuf *
1603 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1604 {
1605 struct ifnet *ifp = sc->sc_ifp;
1606
1607 /* Just pass in the packet to our lagg device */
1608 m->m_pkthdr.rcvif = ifp;
1609
1610 return (m);
1611 }
1612
1613 /*
1614 * 802.3ad LACP
1615 */
1616
1617 static int
1618 lagg_lacp_attach(struct lagg_softc *sc)
1619 {
1620 struct lagg_port *lp;
1621 int error;
1622
1623 sc->sc_detach = lagg_lacp_detach;
1624 sc->sc_port_create = lacp_port_create;
1625 sc->sc_port_destroy = lacp_port_destroy;
1626 sc->sc_linkstate = lacp_linkstate;
1627 sc->sc_start = lagg_lacp_start;
1628 sc->sc_input = lagg_lacp_input;
1629 sc->sc_init = lacp_init;
1630 sc->sc_stop = lacp_stop;
1631 sc->sc_lladdr = lagg_lacp_lladdr;
1632 sc->sc_req = lacp_req;
1633 sc->sc_portreq = lacp_portreq;
1634
1635 error = lacp_attach(sc);
1636 if (error)
1637 return (error);
1638
1639 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1640 lacp_port_create(lp);
1641
1642 return (error);
1643 }
1644
1645 static int
1646 lagg_lacp_detach(struct lagg_softc *sc)
1647 {
1648 struct lagg_port *lp;
1649 int error;
1650
1651 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1652 lacp_port_destroy(lp);
1653
1654 /* unlocking is safe here */
1655 LAGG_WUNLOCK(sc);
1656 error = lacp_detach(sc);
1657 LAGG_WLOCK(sc);
1658
1659 return (error);
1660 }
1661
1662 static void
1663 lagg_lacp_lladdr(struct lagg_softc *sc)
1664 {
1665 struct lagg_port *lp;
1666
1667 /* purge all the lacp ports */
1668 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1669 lacp_port_destroy(lp);
1670
1671 /* add them back in */
1672 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1673 lacp_port_create(lp);
1674 }
1675
1676 static int
1677 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
1678 {
1679 struct lagg_port *lp;
1680
1681 lp = lacp_select_tx_port(sc, m);
1682 if (lp == NULL) {
1683 m_freem(m);
1684 return (EBUSY);
1685 }
1686
1687 /* Send mbuf */
1688 return (lagg_enqueue(lp->lp_ifp, m));
1689 }
1690
1691 static struct mbuf *
1692 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1693 {
1694 struct ifnet *ifp = sc->sc_ifp;
1695 struct ether_header *eh;
1696 u_short etype;
1697
1698 eh = mtod(m, struct ether_header *);
1699 etype = ntohs(eh->ether_type);
1700
1701 /* Tap off LACP control messages */
1702 if (etype == ETHERTYPE_SLOW) {
1703 lacp_input(lp, m);
1704 return (NULL);
1705 }
1706
1707 /*
1708 * If the port is not collecting or not in the active aggregator then
1709 * free and return.
1710 */
1711 if ((lp->lp_flags & LAGG_PORT_COLLECTING) == 0 ||
1712 lacp_port_isactive(lp) == 0) {
1713 m_freem(m);
1714 return (NULL);
1715 }
1716
1717 m->m_pkthdr.rcvif = ifp;
1718 return (m);
1719 }
Cache object: f785427b1aad5953f4b3cfc11490bcf4
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