1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
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.
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.
20 #include <sys/cdefs.h>
21 __FBSDID("$FreeBSD$");
24 #include "opt_inet6.h"
26 #include <sys/param.h>
27 #include <sys/kernel.h>
28 #include <sys/malloc.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>
36 #include <sys/systm.h>
40 #include <sys/rmlock.h>
41 #include <sys/taskqueue.h>
42 #include <sys/eventhandler.h>
44 #include <net/ethernet.h>
46 #include <net/if_clone.h>
47 #include <net/if_arp.h>
48 #include <net/if_dl.h>
49 #include <net/if_llc.h>
50 #include <net/if_media.h>
51 #include <net/if_types.h>
52 #include <net/if_var.h>
55 #if defined(INET) || defined(INET6)
56 #include <netinet/in.h>
59 #include <netinet/in_systm.h>
60 #include <netinet/if_ether.h>
61 #include <netinet/ip.h>
65 #include <netinet/ip6.h>
66 #include <netinet6/in6_var.h>
67 #include <netinet6/in6_ifattach.h>
70 #include <net/if_vlan_var.h>
71 #include <net/if_lagg.h>
72 #include <net/ieee8023ad_lacp.h>
74 /* Special flags we should propagate to the lagg ports. */
77 int (*func)(struct ifnet *, int);
79 {IFF_PROMISC, ifpromisc},
80 {IFF_ALLMULTI, if_allmulti},
84 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */
85 static struct mtx lagg_list_mtx;
86 eventhandler_tag lagg_detach_cookie = NULL;
88 static int lagg_clone_create(struct if_clone *, int, caddr_t);
89 static void lagg_clone_destroy(struct ifnet *);
90 static struct if_clone *lagg_cloner;
91 static const char laggname[] = "lagg";
93 static void lagg_lladdr(struct lagg_softc *, uint8_t *);
94 static void lagg_capabilities(struct lagg_softc *);
95 static void lagg_port_lladdr(struct lagg_port *, uint8_t *);
96 static void lagg_port_setlladdr(void *, int);
97 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
98 static int lagg_port_destroy(struct lagg_port *, int);
99 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
100 static void lagg_linkstate(struct lagg_softc *);
101 static void lagg_port_state(struct ifnet *, int);
102 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
103 static int lagg_port_output(struct ifnet *, struct mbuf *,
104 const struct sockaddr *, struct route *);
105 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
106 #ifdef LAGG_PORT_STACKING
107 static int lagg_port_checkstacking(struct lagg_softc *);
109 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
110 static void lagg_init(void *);
111 static void lagg_stop(struct lagg_softc *);
112 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
113 static int lagg_ether_setmulti(struct lagg_softc *);
114 static int lagg_ether_cmdmulti(struct lagg_port *, int);
115 static int lagg_setflag(struct lagg_port *, int, int,
116 int (*func)(struct ifnet *, int));
117 static int lagg_setflags(struct lagg_port *, int status);
118 static int lagg_transmit(struct ifnet *, struct mbuf *);
119 static void lagg_qflush(struct ifnet *);
120 static int lagg_media_change(struct ifnet *);
121 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
122 static struct lagg_port *lagg_link_active(struct lagg_softc *,
124 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *);
125 static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS);
127 /* Simple round robin */
128 static int lagg_rr_attach(struct lagg_softc *);
129 static int lagg_rr_detach(struct lagg_softc *);
130 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
131 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
134 /* Active failover */
135 static int lagg_fail_attach(struct lagg_softc *);
136 static int lagg_fail_detach(struct lagg_softc *);
137 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
138 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
142 static int lagg_lb_attach(struct lagg_softc *);
143 static int lagg_lb_detach(struct lagg_softc *);
144 static int lagg_lb_port_create(struct lagg_port *);
145 static void lagg_lb_port_destroy(struct lagg_port *);
146 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
147 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
149 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
152 static int lagg_lacp_attach(struct lagg_softc *);
153 static int lagg_lacp_detach(struct lagg_softc *);
154 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
155 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
157 static void lagg_lacp_lladdr(struct lagg_softc *);
159 static void lagg_callout(void *);
161 /* lagg protocol table */
162 static const struct {
164 int (*ti_attach)(struct lagg_softc *);
166 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach },
167 { LAGG_PROTO_FAILOVER, lagg_fail_attach },
168 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach },
169 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach },
170 { LAGG_PROTO_LACP, lagg_lacp_attach },
171 { LAGG_PROTO_NONE, NULL }
174 SYSCTL_DECL(_net_link);
175 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
178 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */
179 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW,
180 &lagg_failover_rx_all, 0,
181 "Accept input from any interface in a failover lagg");
182 static int def_use_flowid = 1; /* Default value for using M_FLOWID */
183 TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid);
184 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW,
186 "Default setting for using flow id for load sharing");
189 lagg_modevent(module_t mod, int type, void *data)
194 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF);
195 SLIST_INIT(&lagg_list);
196 lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
197 lagg_clone_destroy, 0);
198 lagg_input_p = lagg_input;
199 lagg_linkstate_p = lagg_port_state;
200 lagg_detach_cookie = EVENTHANDLER_REGISTER(
201 ifnet_departure_event, lagg_port_ifdetach, NULL,
202 EVENTHANDLER_PRI_ANY);
205 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
207 if_clone_detach(lagg_cloner);
209 lagg_linkstate_p = NULL;
210 mtx_destroy(&lagg_list_mtx);
218 static moduledata_t lagg_mod = {
224 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
225 MODULE_VERSION(if_lagg, 1);
228 * This routine is run via an vlan
232 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
234 struct lagg_softc *sc = ifp->if_softc;
235 struct lagg_port *lp;
236 struct rm_priotracker tracker;
238 if (ifp->if_softc != arg) /* Not our event */
241 LAGG_RLOCK(sc, &tracker);
242 if (!SLIST_EMPTY(&sc->sc_ports)) {
243 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
244 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
246 LAGG_RUNLOCK(sc, &tracker);
250 * This routine is run via an vlan
254 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
256 struct lagg_softc *sc = ifp->if_softc;
257 struct lagg_port *lp;
258 struct rm_priotracker tracker;
260 if (ifp->if_softc != arg) /* Not our event */
263 LAGG_RLOCK(sc, &tracker);
264 if (!SLIST_EMPTY(&sc->sc_ports)) {
265 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
266 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
268 LAGG_RUNLOCK(sc, &tracker);
272 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
274 struct lagg_softc *sc;
277 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
278 struct sysctl_oid *oid;
279 char num[14]; /* sufficient for 32 bits */
281 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
282 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
288 sc->sc_ipackets = counter_u64_alloc(M_WAITOK);
289 sc->sc_opackets = counter_u64_alloc(M_WAITOK);
290 sc->sc_ibytes = counter_u64_alloc(M_WAITOK);
291 sc->sc_obytes = counter_u64_alloc(M_WAITOK);
293 sysctl_ctx_init(&sc->ctx);
294 snprintf(num, sizeof(num), "%u", unit);
295 sc->use_flowid = def_use_flowid;
296 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx,
297 &SYSCTL_NODE_CHILDREN(_net_link, lagg),
298 OID_AUTO, num, CTLFLAG_RD, NULL, "");
299 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
300 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid,
301 "Use flow id for load sharing");
302 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
303 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count,
304 "Total number of ports");
305 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
306 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active,
307 "I", "Total number of active ports");
308 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
309 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping,
310 sc->sc_flapping, "Total number of port change events");
311 /* Hash all layers by default */
312 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4;
314 sc->sc_proto = LAGG_PROTO_NONE;
315 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) {
316 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) {
317 sc->sc_proto = lagg_protos[i].ti_proto;
318 if ((error = lagg_protos[i].ti_attach(sc)) != 0) {
327 LAGG_CALLOUT_LOCK_INIT(sc);
328 SLIST_INIT(&sc->sc_ports);
329 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
332 * This uses the callout lock rather than the rmlock; one can't
333 * hold said rmlock during SWI.
335 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0);
337 /* Initialise pseudo media types */
338 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
340 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
341 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
343 if_initname(ifp, laggname, unit);
345 ifp->if_transmit = lagg_transmit;
346 ifp->if_qflush = lagg_qflush;
347 ifp->if_init = lagg_init;
348 ifp->if_ioctl = lagg_ioctl;
349 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
350 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
353 * Attach as an ordinary ethernet device, children will be attached
354 * as special device IFT_IEEE8023ADLAG.
356 ether_ifattach(ifp, eaddr);
358 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
359 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
360 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
361 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
363 /* Insert into the global list of laggs */
364 mtx_lock(&lagg_list_mtx);
365 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries);
366 mtx_unlock(&lagg_list_mtx);
368 callout_reset(&sc->sc_callout, hz, lagg_callout, sc);
374 lagg_clone_destroy(struct ifnet *ifp)
376 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
377 struct lagg_port *lp;
382 ifp->if_flags &= ~IFF_UP;
384 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
385 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
387 /* Shutdown and remove lagg ports */
388 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
389 lagg_port_destroy(lp, 1);
390 /* Unhook the aggregation protocol */
391 if (sc->sc_detach != NULL)
392 (*sc->sc_detach)(sc);
396 sysctl_ctx_free(&sc->ctx);
397 ifmedia_removeall(&sc->sc_media);
401 /* This grabs sc_callout_mtx, serialising it correctly */
402 callout_drain(&sc->sc_callout);
404 /* At this point it's drained; we can free this */
405 counter_u64_free(sc->sc_ipackets);
406 counter_u64_free(sc->sc_opackets);
407 counter_u64_free(sc->sc_ibytes);
408 counter_u64_free(sc->sc_obytes);
410 mtx_lock(&lagg_list_mtx);
411 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries);
412 mtx_unlock(&lagg_list_mtx);
414 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
415 LAGG_LOCK_DESTROY(sc);
416 LAGG_CALLOUT_LOCK_DESTROY(sc);
421 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
423 struct ifnet *ifp = sc->sc_ifp;
425 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
428 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
429 /* Let the protocol know the MAC has changed */
430 if (sc->sc_lladdr != NULL)
431 (*sc->sc_lladdr)(sc);
432 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
436 lagg_capabilities(struct lagg_softc *sc)
438 struct lagg_port *lp;
439 int cap = ~0, ena = ~0;
442 LAGG_WLOCK_ASSERT(sc);
444 /* Get capabilities from the lagg ports */
445 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
446 cap &= lp->lp_ifp->if_capabilities;
447 ena &= lp->lp_ifp->if_capenable;
448 hwa &= lp->lp_ifp->if_hwassist;
450 cap = (cap == ~0 ? 0 : cap);
451 ena = (ena == ~0 ? 0 : ena);
452 hwa = (hwa == ~0 ? 0 : hwa);
454 if (sc->sc_ifp->if_capabilities != cap ||
455 sc->sc_ifp->if_capenable != ena ||
456 sc->sc_ifp->if_hwassist != hwa) {
457 sc->sc_ifp->if_capabilities = cap;
458 sc->sc_ifp->if_capenable = ena;
459 sc->sc_ifp->if_hwassist = hwa;
460 getmicrotime(&sc->sc_ifp->if_lastchange);
462 if (sc->sc_ifflags & IFF_DEBUG)
463 if_printf(sc->sc_ifp,
464 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
469 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr)
471 struct lagg_softc *sc = lp->lp_softc;
472 struct ifnet *ifp = lp->lp_ifp;
473 struct lagg_llq *llq;
476 LAGG_WLOCK_ASSERT(sc);
478 if (lp->lp_detaching ||
479 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
482 /* Check to make sure its not already queued to be changed */
483 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
484 if (llq->llq_ifp == ifp) {
491 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT);
492 if (llq == NULL) /* XXX what to do */
496 /* Update the lladdr even if pending, it may have changed */
498 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
501 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
503 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
507 * Set the interface MAC address from a taskqueue to avoid a LOR.
510 lagg_port_setlladdr(void *arg, int pending)
512 struct lagg_softc *sc = (struct lagg_softc *)arg;
513 struct lagg_llq *llq, *head;
517 /* Grab a local reference of the queue and remove it from the softc */
519 head = SLIST_FIRST(&sc->sc_llq_head);
520 SLIST_FIRST(&sc->sc_llq_head) = NULL;
524 * Traverse the queue and set the lladdr on each ifp. It is safe to do
525 * unlocked as we have the only reference to it.
527 for (llq = head; llq != NULL; llq = head) {
530 /* Set the link layer address */
531 CURVNET_SET(ifp->if_vnet);
532 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN);
535 printf("%s: setlladdr failed on %s\n", __func__,
538 head = SLIST_NEXT(llq, llq_entries);
544 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
546 struct lagg_softc *sc_ptr;
547 struct lagg_port *lp;
550 LAGG_WLOCK_ASSERT(sc);
552 /* Limit the maximal number of lagg ports */
553 if (sc->sc_count >= LAGG_MAX_PORTS)
556 /* Check if port has already been associated to a lagg */
557 if (ifp->if_lagg != NULL) {
558 /* Port is already in the current lagg? */
559 lp = (struct lagg_port *)ifp->if_lagg;
560 if (lp->lp_softc == sc)
565 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
566 if (ifp->if_type != IFT_ETHER)
567 return (EPROTONOSUPPORT);
571 * The member interface should not have inet6 address because
572 * two interfaces with a valid link-local scope zone must not be
573 * merged in any form. This restriction is needed to
574 * prevent violation of link-local scope zone. Attempts to
575 * add a member interface which has inet6 addresses triggers
576 * removal of all inet6 addresses on the member interface.
578 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
579 if (in6ifa_llaonifp(lp->lp_ifp)) {
580 in6_ifdetach(lp->lp_ifp);
581 if_printf(sc->sc_ifp,
582 "IPv6 addresses on %s have been removed "
583 "before adding it as a member to prevent "
584 "IPv6 address scope violation.\n",
585 lp->lp_ifp->if_xname);
588 if (in6ifa_llaonifp(ifp)) {
590 if_printf(sc->sc_ifp,
591 "IPv6 addresses on %s have been removed "
592 "before adding it as a member to prevent "
593 "IPv6 address scope violation.\n",
597 /* Allow the first Ethernet member to define the MTU */
598 if (SLIST_EMPTY(&sc->sc_ports))
599 sc->sc_ifp->if_mtu = ifp->if_mtu;
600 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
601 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
606 if ((lp = malloc(sizeof(struct lagg_port),
607 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
610 /* Check if port is a stacked lagg */
611 mtx_lock(&lagg_list_mtx);
612 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) {
613 if (ifp == sc_ptr->sc_ifp) {
614 mtx_unlock(&lagg_list_mtx);
617 /* XXX disable stacking for the moment, its untested */
618 #ifdef LAGG_PORT_STACKING
619 lp->lp_flags |= LAGG_PORT_STACK;
620 if (lagg_port_checkstacking(sc_ptr) >=
622 mtx_unlock(&lagg_list_mtx);
629 mtx_unlock(&lagg_list_mtx);
631 /* Change the interface type */
632 lp->lp_iftype = ifp->if_type;
633 ifp->if_type = IFT_IEEE8023ADLAG;
635 lp->lp_ioctl = ifp->if_ioctl;
636 ifp->if_ioctl = lagg_port_ioctl;
637 lp->lp_output = ifp->if_output;
638 ifp->if_output = lagg_port_output;
643 /* Save port link layer address */
644 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
646 if (SLIST_EMPTY(&sc->sc_ports)) {
648 lagg_lladdr(sc, IF_LLADDR(ifp));
650 /* Update link layer address for this port */
651 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp));
654 /* Insert into the list of ports */
655 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
658 /* Update lagg capabilities */
659 lagg_capabilities(sc);
662 /* Add multicast addresses and interface flags to this port */
663 lagg_ether_cmdmulti(lp, 1);
664 lagg_setflags(lp, 1);
666 if (sc->sc_port_create != NULL)
667 error = (*sc->sc_port_create)(lp);
669 /* remove the port again, without calling sc_port_destroy */
670 lagg_port_destroy(lp, 0);
677 #ifdef LAGG_PORT_STACKING
679 lagg_port_checkstacking(struct lagg_softc *sc)
681 struct lagg_softc *sc_ptr;
682 struct lagg_port *lp;
685 LAGG_WLOCK_ASSERT(sc);
687 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
688 if (lp->lp_flags & LAGG_PORT_STACK) {
689 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
690 m = MAX(m, lagg_port_checkstacking(sc_ptr));
699 lagg_port_destroy(struct lagg_port *lp, int runpd)
701 struct lagg_softc *sc = lp->lp_softc;
702 struct lagg_port *lp_ptr;
703 struct lagg_llq *llq;
704 struct ifnet *ifp = lp->lp_ifp;
706 LAGG_WLOCK_ASSERT(sc);
708 if (runpd && sc->sc_port_destroy != NULL)
709 (*sc->sc_port_destroy)(lp);
712 * Remove multicast addresses and interface flags from this port and
713 * reset the MAC address, skip if the interface is being detached.
715 if (!lp->lp_detaching) {
716 lagg_ether_cmdmulti(lp, 0);
717 lagg_setflags(lp, 0);
718 lagg_port_lladdr(lp, lp->lp_lladdr);
721 /* Restore interface */
722 ifp->if_type = lp->lp_iftype;
723 ifp->if_ioctl = lp->lp_ioctl;
724 ifp->if_output = lp->lp_output;
727 /* Finally, remove the port from the lagg */
728 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
731 /* Update the primary interface */
732 if (lp == sc->sc_primary) {
733 uint8_t lladdr[ETHER_ADDR_LEN];
735 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) {
736 bzero(&lladdr, ETHER_ADDR_LEN);
738 bcopy(lp_ptr->lp_lladdr,
739 lladdr, ETHER_ADDR_LEN);
741 lagg_lladdr(sc, lladdr);
742 sc->sc_primary = lp_ptr;
744 /* Update link layer address for each port */
745 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
746 lagg_port_lladdr(lp_ptr, lladdr);
749 /* Remove any pending lladdr changes from the queue */
750 if (lp->lp_detaching) {
751 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
752 if (llq->llq_ifp == ifp) {
753 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
756 break; /* Only appears once */
762 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
766 /* Update lagg capabilities */
767 lagg_capabilities(sc);
774 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
776 struct lagg_reqport *rp = (struct lagg_reqport *)data;
777 struct lagg_softc *sc;
778 struct lagg_port *lp = NULL;
780 struct rm_priotracker tracker;
782 /* Should be checked by the caller */
783 if (ifp->if_type != IFT_IEEE8023ADLAG ||
784 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
789 if (rp->rp_portname[0] == '\0' ||
790 ifunit(rp->rp_portname) != ifp) {
795 LAGG_RLOCK(sc, &tracker);
796 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
798 LAGG_RUNLOCK(sc, &tracker);
802 lagg_port2req(lp, rp);
803 LAGG_RUNLOCK(sc, &tracker);
807 if (lp->lp_ioctl == NULL) {
811 error = (*lp->lp_ioctl)(ifp, cmd, data);
815 /* Update lagg interface capabilities */
817 lagg_capabilities(sc);
822 /* Do not allow the MTU to be changed once joined */
833 if (lp->lp_ioctl != NULL)
834 return ((*lp->lp_ioctl)(ifp, cmd, data));
840 * For direct output to child ports.
843 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
844 const struct sockaddr *dst, struct route *ro)
846 struct lagg_port *lp = ifp->if_lagg;
848 switch (dst->sa_family) {
849 case pseudo_AF_HDRCMPLT:
851 return ((*lp->lp_output)(ifp, m, dst, ro));
854 /* drop any other frames */
860 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
862 struct lagg_port *lp;
863 struct lagg_softc *sc;
865 if ((lp = ifp->if_lagg) == NULL)
867 /* If the ifnet is just being renamed, don't do anything. */
868 if (ifp->if_flags & IFF_RENAMING)
874 lp->lp_detaching = 1;
875 lagg_port_destroy(lp, 1);
880 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
882 struct lagg_softc *sc = lp->lp_softc;
884 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
885 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
886 rp->rp_prio = lp->lp_prio;
887 rp->rp_flags = lp->lp_flags;
888 if (sc->sc_portreq != NULL)
889 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc);
891 /* Add protocol specific flags */
892 switch (sc->sc_proto) {
893 case LAGG_PROTO_FAILOVER:
894 if (lp == sc->sc_primary)
895 rp->rp_flags |= LAGG_PORT_MASTER;
896 if (lp == lagg_link_active(sc, sc->sc_primary))
897 rp->rp_flags |= LAGG_PORT_ACTIVE;
900 case LAGG_PROTO_ROUNDROBIN:
901 case LAGG_PROTO_LOADBALANCE:
902 case LAGG_PROTO_ETHERCHANNEL:
903 if (LAGG_PORTACTIVE(lp))
904 rp->rp_flags |= LAGG_PORT_ACTIVE;
907 case LAGG_PROTO_LACP:
908 /* LACP has a different definition of active */
909 if (lacp_isactive(lp))
910 rp->rp_flags |= LAGG_PORT_ACTIVE;
911 if (lacp_iscollecting(lp))
912 rp->rp_flags |= LAGG_PORT_COLLECTING;
913 if (lacp_isdistributing(lp))
914 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
923 struct lagg_softc *sc = (struct lagg_softc *)xsc;
924 struct lagg_port *lp;
925 struct ifnet *ifp = sc->sc_ifp;
927 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
932 ifp->if_drv_flags |= IFF_DRV_RUNNING;
933 /* Update the port lladdrs */
934 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
935 lagg_port_lladdr(lp, IF_LLADDR(ifp));
937 if (sc->sc_init != NULL)
944 lagg_stop(struct lagg_softc *sc)
946 struct ifnet *ifp = sc->sc_ifp;
948 LAGG_WLOCK_ASSERT(sc);
950 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
953 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
955 if (sc->sc_stop != NULL)
960 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
962 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
963 struct lagg_reqall *ra = (struct lagg_reqall *)data;
964 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
965 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
966 struct ifreq *ifr = (struct ifreq *)data;
967 struct lagg_port *lp;
969 struct thread *td = curthread;
971 int count, buflen, len, error = 0;
972 struct rm_priotracker tracker;
974 bzero(&rpbuf, sizeof(rpbuf));
978 LAGG_RLOCK(sc, &tracker);
980 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
982 buflen = count * sizeof(struct lagg_reqport);
983 LAGG_RUNLOCK(sc, &tracker);
985 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
987 LAGG_RLOCK(sc, &tracker);
988 ra->ra_proto = sc->sc_proto;
989 if (sc->sc_req != NULL)
990 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc);
994 len = min(ra->ra_size, buflen);
995 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
996 if (len < sizeof(rpbuf))
999 lagg_port2req(lp, &rpbuf);
1000 memcpy(buf, &rpbuf, sizeof(rpbuf));
1002 buf += sizeof(rpbuf);
1003 len -= sizeof(rpbuf);
1005 LAGG_RUNLOCK(sc, &tracker);
1006 ra->ra_ports = count;
1007 ra->ra_size = count * sizeof(rpbuf);
1008 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1009 free(outbuf, M_TEMP);
1012 error = priv_check(td, PRIV_NET_LAGG);
1015 if (ra->ra_proto >= LAGG_PROTO_MAX) {
1016 error = EPROTONOSUPPORT;
1020 if (sc->sc_proto != LAGG_PROTO_NONE) {
1021 /* Reset protocol first in case detach unlocks */
1022 sc->sc_proto = LAGG_PROTO_NONE;
1023 error = sc->sc_detach(sc);
1024 sc->sc_detach = NULL;
1025 sc->sc_start = NULL;
1026 sc->sc_input = NULL;
1027 sc->sc_port_create = NULL;
1028 sc->sc_port_destroy = NULL;
1029 sc->sc_linkstate = NULL;
1032 sc->sc_lladdr = NULL;
1034 sc->sc_portreq = NULL;
1035 } else if (sc->sc_input != NULL) {
1036 /* Still detaching */
1043 for (int i = 0; i < (sizeof(lagg_protos) /
1044 sizeof(lagg_protos[0])); i++) {
1045 if (lagg_protos[i].ti_proto == ra->ra_proto) {
1046 if (sc->sc_ifflags & IFF_DEBUG)
1047 printf("%s: using proto %u\n",
1049 lagg_protos[i].ti_proto);
1050 sc->sc_proto = lagg_protos[i].ti_proto;
1051 if (sc->sc_proto != LAGG_PROTO_NONE)
1052 error = lagg_protos[i].ti_attach(sc);
1058 error = EPROTONOSUPPORT;
1060 case SIOCGLAGGFLAGS:
1061 rf->rf_flags = sc->sc_flags;
1064 error = priv_check(td, PRIV_NET_LAGG);
1067 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1072 sc->sc_flags &= ~LAGG_F_HASHMASK;
1073 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK;
1077 if (rp->rp_portname[0] == '\0' ||
1078 (tpif = ifunit(rp->rp_portname)) == NULL) {
1083 LAGG_RLOCK(sc, &tracker);
1084 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1085 lp->lp_softc != sc) {
1087 LAGG_RUNLOCK(sc, &tracker);
1091 lagg_port2req(lp, rp);
1092 LAGG_RUNLOCK(sc, &tracker);
1095 error = priv_check(td, PRIV_NET_LAGG);
1098 if (rp->rp_portname[0] == '\0' ||
1099 (tpif = ifunit(rp->rp_portname)) == NULL) {
1104 error = lagg_port_create(sc, tpif);
1107 case SIOCSLAGGDELPORT:
1108 error = priv_check(td, PRIV_NET_LAGG);
1111 if (rp->rp_portname[0] == '\0' ||
1112 (tpif = ifunit(rp->rp_portname)) == NULL) {
1118 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1119 lp->lp_softc != sc) {
1125 error = lagg_port_destroy(lp, 1);
1129 /* Set flags on ports too */
1131 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1132 lagg_setflags(lp, 1);
1136 if (!(ifp->if_flags & IFF_UP) &&
1137 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1139 * If interface is marked down and it is running,
1140 * then stop and disable it.
1145 } else if ((ifp->if_flags & IFF_UP) &&
1146 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1148 * If interface is marked up and it is stopped, then
1151 (*ifp->if_init)(sc);
1157 error = lagg_ether_setmulti(sc);
1162 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1167 /* Do not allow the MTU or caps to be directly changed */
1172 error = ether_ioctl(ifp, cmd, data);
1179 lagg_ether_setmulti(struct lagg_softc *sc)
1181 struct lagg_port *lp;
1183 LAGG_WLOCK_ASSERT(sc);
1185 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1186 /* First, remove any existing filter entries. */
1187 lagg_ether_cmdmulti(lp, 0);
1188 /* copy all addresses from the lagg interface to the port */
1189 lagg_ether_cmdmulti(lp, 1);
1195 lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1197 struct lagg_softc *sc = lp->lp_softc;
1198 struct ifnet *ifp = lp->lp_ifp;
1199 struct ifnet *scifp = sc->sc_ifp;
1201 struct ifmultiaddr *ifma, *rifma = NULL;
1202 struct sockaddr_dl sdl;
1205 LAGG_WLOCK_ASSERT(sc);
1207 bzero((char *)&sdl, sizeof(sdl));
1208 sdl.sdl_len = sizeof(sdl);
1209 sdl.sdl_family = AF_LINK;
1210 sdl.sdl_type = IFT_ETHER;
1211 sdl.sdl_alen = ETHER_ADDR_LEN;
1212 sdl.sdl_index = ifp->if_index;
1215 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1216 if (ifma->ifma_addr->sa_family != AF_LINK)
1218 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
1219 LLADDR(&sdl), ETHER_ADDR_LEN);
1221 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
1224 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1227 mc->mc_ifma = rifma;
1228 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1231 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1232 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1233 if_delmulti_ifma(mc->mc_ifma);
1240 /* Handle a ref counted flag that should be set on the lagg port as well */
1242 lagg_setflag(struct lagg_port *lp, int flag, int status,
1243 int (*func)(struct ifnet *, int))
1245 struct lagg_softc *sc = lp->lp_softc;
1246 struct ifnet *scifp = sc->sc_ifp;
1247 struct ifnet *ifp = lp->lp_ifp;
1250 LAGG_WLOCK_ASSERT(sc);
1252 status = status ? (scifp->if_flags & flag) : 0;
1253 /* Now "status" contains the flag value or 0 */
1256 * See if recorded ports status is different from what
1257 * we want it to be. If it is, flip it. We record ports
1258 * status in lp_ifflags so that we won't clear ports flag
1259 * we haven't set. In fact, we don't clear or set ports
1260 * flags directly, but get or release references to them.
1261 * That's why we can be sure that recorded flags still are
1262 * in accord with actual ports flags.
1264 if (status != (lp->lp_ifflags & flag)) {
1265 error = (*func)(ifp, status);
1268 lp->lp_ifflags &= ~flag;
1269 lp->lp_ifflags |= status;
1275 * Handle IFF_* flags that require certain changes on the lagg port
1276 * if "status" is true, update ports flags respective to the lagg
1277 * if "status" is false, forcedly clear the flags set on port.
1280 lagg_setflags(struct lagg_port *lp, int status)
1284 for (i = 0; lagg_pflags[i].flag; i++) {
1285 error = lagg_setflag(lp, lagg_pflags[i].flag,
1286 status, lagg_pflags[i].func);
1294 lagg_transmit(struct ifnet *ifp, struct mbuf *m)
1296 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1297 int error, len, mcast;
1298 struct rm_priotracker tracker;
1300 len = m->m_pkthdr.len;
1301 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
1303 LAGG_RLOCK(sc, &tracker);
1304 /* We need a Tx algorithm and at least one port */
1305 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
1306 LAGG_RUNLOCK(sc, &tracker);
1312 ETHER_BPF_MTAP(ifp, m);
1314 error = (*sc->sc_start)(sc, m);
1315 LAGG_RUNLOCK(sc, &tracker);
1318 counter_u64_add(sc->sc_opackets, 1);
1319 counter_u64_add(sc->sc_obytes, len);
1320 ifp->if_omcasts += mcast;
1328 * The ifp->if_qflush entry point for lagg(4) is no-op.
1331 lagg_qflush(struct ifnet *ifp __unused)
1335 static struct mbuf *
1336 lagg_input(struct ifnet *ifp, struct mbuf *m)
1338 struct lagg_port *lp = ifp->if_lagg;
1339 struct lagg_softc *sc = lp->lp_softc;
1340 struct ifnet *scifp = sc->sc_ifp;
1341 struct rm_priotracker tracker;
1343 LAGG_RLOCK(sc, &tracker);
1344 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1345 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1346 sc->sc_proto == LAGG_PROTO_NONE) {
1347 LAGG_RUNLOCK(sc, &tracker);
1352 ETHER_BPF_MTAP(scifp, m);
1354 m = (*sc->sc_input)(sc, lp, m);
1357 counter_u64_add(sc->sc_ipackets, 1);
1358 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len);
1360 if (scifp->if_flags & IFF_MONITOR) {
1366 LAGG_RUNLOCK(sc, &tracker);
1371 lagg_media_change(struct ifnet *ifp)
1373 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1375 if (sc->sc_ifflags & IFF_DEBUG)
1376 printf("%s\n", __func__);
1383 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1385 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1386 struct lagg_port *lp;
1387 struct rm_priotracker tracker;
1389 imr->ifm_status = IFM_AVALID;
1390 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1392 LAGG_RLOCK(sc, &tracker);
1393 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1394 if (LAGG_PORTACTIVE(lp))
1395 imr->ifm_status |= IFM_ACTIVE;
1397 LAGG_RUNLOCK(sc, &tracker);
1401 lagg_linkstate(struct lagg_softc *sc)
1403 struct lagg_port *lp;
1404 int new_link = LINK_STATE_DOWN;
1407 /* Our link is considered up if at least one of our ports is active */
1408 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1409 if (lp->lp_link_state == LINK_STATE_UP) {
1410 new_link = LINK_STATE_UP;
1414 if_link_state_change(sc->sc_ifp, new_link);
1416 /* Update if_baudrate to reflect the max possible speed */
1417 switch (sc->sc_proto) {
1418 case LAGG_PROTO_FAILOVER:
1419 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
1420 sc->sc_primary->lp_ifp->if_baudrate : 0;
1422 case LAGG_PROTO_ROUNDROBIN:
1423 case LAGG_PROTO_LOADBALANCE:
1424 case LAGG_PROTO_ETHERCHANNEL:
1426 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1427 speed += lp->lp_ifp->if_baudrate;
1428 sc->sc_ifp->if_baudrate = speed;
1430 case LAGG_PROTO_LACP:
1431 /* LACP updates if_baudrate itself */
1437 lagg_port_state(struct ifnet *ifp, int state)
1439 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1440 struct lagg_softc *sc = NULL;
1449 if (sc->sc_linkstate != NULL)
1450 (*sc->sc_linkstate)(lp);
1455 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1457 struct lagg_port *lp_next, *rval = NULL;
1458 // int new_link = LINK_STATE_DOWN;
1460 LAGG_RLOCK_ASSERT(sc);
1462 * Search a port which reports an active link state.
1467 if (LAGG_PORTACTIVE(lp)) {
1471 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1472 LAGG_PORTACTIVE(lp_next)) {
1478 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1479 if (LAGG_PORTACTIVE(lp_next)) {
1488 * The IEEE 802.1D standard assumes that a lagg with
1489 * multiple ports is always full duplex. This is valid
1490 * for load sharing laggs and if at least two links
1491 * are active. Unfortunately, checking the latter would
1492 * be too expensive at this point.
1494 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1496 new_link = LINK_STATE_FULL_DUPLEX;
1498 new_link = rval->lp_link_state;
1506 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf)
1508 if (m->m_pkthdr.len < (off + len)) {
1510 } else if (m->m_len < (off + len)) {
1511 m_copydata(m, off, len, buf);
1514 return (mtod(m, char *) + off);
1518 lagg_sysctl_active(SYSCTL_HANDLER_ARGS)
1520 struct lagg_softc *sc = (struct lagg_softc *)arg1;
1521 struct lagg_port *lp;
1524 /* LACP tracks active links automatically, the others do not */
1525 if (sc->sc_proto != LAGG_PROTO_LACP) {
1527 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1528 sc->sc_active += LAGG_PORTACTIVE(lp);
1531 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req);
1532 if ((error) || (req->newptr == NULL))
1539 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key)
1544 struct ether_header *eh;
1545 const struct ether_vlan_header *vlan;
1547 const struct ip *ip;
1548 const uint32_t *ports;
1552 const struct ip6_hdr *ip6;
1562 struct ether_vlan_header vlan;
1570 eh = mtod(m, struct ether_header *);
1571 etype = ntohs(eh->ether_type);
1572 if (sc->sc_flags & LAGG_F_HASHL2) {
1573 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p);
1574 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p);
1577 /* Special handling for encapsulating VLAN frames */
1578 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) {
1579 p = hash32_buf(&m->m_pkthdr.ether_vtag,
1580 sizeof(m->m_pkthdr.ether_vtag), p);
1581 } else if (etype == ETHERTYPE_VLAN) {
1582 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf);
1586 if (sc->sc_flags & LAGG_F_HASHL2)
1587 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p);
1588 etype = ntohs(vlan->evl_proto);
1589 off += sizeof(*vlan) - sizeof(*eh);
1595 ip = lagg_gethdr(m, off, sizeof(*ip), &buf);
1599 if (sc->sc_flags & LAGG_F_HASHL3) {
1600 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p);
1601 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p);
1603 if (!(sc->sc_flags & LAGG_F_HASHL4))
1609 iphlen = ip->ip_hl << 2;
1610 if (iphlen < sizeof(*ip))
1613 ports = lagg_gethdr(m, off, sizeof(*ports), &buf);
1616 p = hash32_buf(ports, sizeof(*ports), p);
1622 case ETHERTYPE_IPV6:
1623 if (!(sc->sc_flags & LAGG_F_HASHL3))
1625 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf);
1629 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p);
1630 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p);
1631 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
1632 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */
1641 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1644 return (ifp->if_transmit)(ifp, m);
1648 * Simple round robin aggregation
1652 lagg_rr_attach(struct lagg_softc *sc)
1654 sc->sc_detach = lagg_rr_detach;
1655 sc->sc_start = lagg_rr_start;
1656 sc->sc_input = lagg_rr_input;
1657 sc->sc_port_create = NULL;
1658 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1665 lagg_rr_detach(struct lagg_softc *sc)
1671 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1673 struct lagg_port *lp;
1676 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1678 lp = SLIST_FIRST(&sc->sc_ports);
1680 lp = SLIST_NEXT(lp, lp_entries);
1683 * Check the port's link state. This will return the next active
1684 * port if the link is down or the port is NULL.
1686 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1692 return (lagg_enqueue(lp->lp_ifp, m));
1695 static struct mbuf *
1696 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1698 struct ifnet *ifp = sc->sc_ifp;
1700 /* Just pass in the packet to our lagg device */
1701 m->m_pkthdr.rcvif = ifp;
1711 lagg_fail_attach(struct lagg_softc *sc)
1713 sc->sc_detach = lagg_fail_detach;
1714 sc->sc_start = lagg_fail_start;
1715 sc->sc_input = lagg_fail_input;
1716 sc->sc_port_create = NULL;
1717 sc->sc_port_destroy = NULL;
1723 lagg_fail_detach(struct lagg_softc *sc)
1729 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
1731 struct lagg_port *lp;
1733 /* Use the master port if active or the next available port */
1734 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
1740 return (lagg_enqueue(lp->lp_ifp, m));
1743 static struct mbuf *
1744 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1746 struct ifnet *ifp = sc->sc_ifp;
1747 struct lagg_port *tmp_tp;
1749 if (lp == sc->sc_primary || lagg_failover_rx_all) {
1750 m->m_pkthdr.rcvif = ifp;
1754 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
1755 tmp_tp = lagg_link_active(sc, sc->sc_primary);
1757 * If tmp_tp is null, we've recieved a packet when all
1758 * our links are down. Weird, but process it anyways.
1760 if ((tmp_tp == NULL || tmp_tp == lp)) {
1761 m->m_pkthdr.rcvif = ifp;
1775 lagg_lb_attach(struct lagg_softc *sc)
1777 struct lagg_port *lp;
1780 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb),
1781 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
1784 sc->sc_detach = lagg_lb_detach;
1785 sc->sc_start = lagg_lb_start;
1786 sc->sc_input = lagg_lb_input;
1787 sc->sc_port_create = lagg_lb_port_create;
1788 sc->sc_port_destroy = lagg_lb_port_destroy;
1789 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1791 lb->lb_key = arc4random();
1792 sc->sc_psc = (caddr_t)lb;
1794 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1795 lagg_lb_port_create(lp);
1801 lagg_lb_detach(struct lagg_softc *sc)
1803 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1810 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
1812 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1813 struct lagg_port *lp_next;
1816 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
1817 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1820 if (i >= LAGG_MAX_PORTS)
1822 if (sc->sc_ifflags & IFF_DEBUG)
1823 printf("%s: port %s at index %d\n",
1824 sc->sc_ifname, lp_next->lp_ifname, i);
1825 lb->lb_ports[i++] = lp_next;
1832 lagg_lb_port_create(struct lagg_port *lp)
1834 struct lagg_softc *sc = lp->lp_softc;
1835 return (lagg_lb_porttable(sc, NULL));
1839 lagg_lb_port_destroy(struct lagg_port *lp)
1841 struct lagg_softc *sc = lp->lp_softc;
1842 lagg_lb_porttable(sc, lp);
1846 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
1848 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1849 struct lagg_port *lp = NULL;
1852 if (sc->use_flowid && (m->m_flags & M_FLOWID))
1853 p = m->m_pkthdr.flowid;
1855 p = lagg_hashmbuf(sc, m, lb->lb_key);
1857 lp = lb->lb_ports[p];
1860 * Check the port's link state. This will return the next active
1861 * port if the link is down or the port is NULL.
1863 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1869 return (lagg_enqueue(lp->lp_ifp, m));
1872 static struct mbuf *
1873 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1875 struct ifnet *ifp = sc->sc_ifp;
1877 /* Just pass in the packet to our lagg device */
1878 m->m_pkthdr.rcvif = ifp;
1888 lagg_lacp_attach(struct lagg_softc *sc)
1890 struct lagg_port *lp;
1893 sc->sc_detach = lagg_lacp_detach;
1894 sc->sc_port_create = lacp_port_create;
1895 sc->sc_port_destroy = lacp_port_destroy;
1896 sc->sc_linkstate = lacp_linkstate;
1897 sc->sc_start = lagg_lacp_start;
1898 sc->sc_input = lagg_lacp_input;
1899 sc->sc_init = lacp_init;
1900 sc->sc_stop = lacp_stop;
1901 sc->sc_lladdr = lagg_lacp_lladdr;
1902 sc->sc_req = lacp_req;
1903 sc->sc_portreq = lacp_portreq;
1905 error = lacp_attach(sc);
1909 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1910 lacp_port_create(lp);
1916 lagg_lacp_detach(struct lagg_softc *sc)
1918 struct lagg_port *lp;
1921 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1922 lacp_port_destroy(lp);
1924 /* unlocking is safe here */
1926 error = lacp_detach(sc);
1933 lagg_lacp_lladdr(struct lagg_softc *sc)
1935 struct lagg_port *lp;
1937 /* purge all the lacp ports */
1938 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1939 lacp_port_destroy(lp);
1941 /* add them back in */
1942 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1943 lacp_port_create(lp);
1947 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
1949 struct lagg_port *lp;
1951 lp = lacp_select_tx_port(sc, m);
1958 return (lagg_enqueue(lp->lp_ifp, m));
1961 static struct mbuf *
1962 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1964 struct ifnet *ifp = sc->sc_ifp;
1965 struct ether_header *eh;
1968 eh = mtod(m, struct ether_header *);
1969 etype = ntohs(eh->ether_type);
1971 /* Tap off LACP control messages */
1972 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
1973 m = lacp_input(lp, m);
1979 * If the port is not collecting or not in the active aggregator then
1982 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
1987 m->m_pkthdr.rcvif = ifp;
1992 lagg_callout(void *arg)
1994 struct lagg_softc *sc = (struct lagg_softc *)arg;
1995 struct ifnet *ifp = sc->sc_ifp;
1997 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets);
1998 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets);
1999 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes);
2000 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes);
2002 callout_reset(&sc->sc_callout, hz, lagg_callout, sc);