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>
6 * Copyright (c) 2014 Marcelo Araujo <araujo@FreeBSD.org>
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <sys/cdefs.h>
22 __FBSDID("$FreeBSD$");
25 #include "opt_inet6.h"
27 #include <sys/param.h>
28 #include <sys/kernel.h>
29 #include <sys/malloc.h>
31 #include <sys/queue.h>
32 #include <sys/socket.h>
33 #include <sys/sockio.h>
34 #include <sys/sysctl.h>
35 #include <sys/module.h>
37 #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_media.h>
50 #include <net/if_types.h>
51 #include <net/if_var.h>
55 #if defined(INET) || defined(INET6)
56 #include <netinet/in.h>
57 #include <netinet/ip.h>
60 #include <netinet/in_systm.h>
61 #include <netinet/if_ether.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 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
85 #define V_lagg_list VNET(lagg_list)
86 static VNET_DEFINE(struct mtx, lagg_list_mtx);
87 #define V_lagg_list_mtx VNET(lagg_list_mtx)
88 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \
89 "if_lagg list", NULL, MTX_DEF)
90 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx)
91 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx)
92 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx)
93 eventhandler_tag lagg_detach_cookie = NULL;
95 static int lagg_clone_create(struct if_clone *, int, caddr_t);
96 static void lagg_clone_destroy(struct ifnet *);
97 static VNET_DEFINE(struct if_clone *, lagg_cloner);
98 #define V_lagg_cloner VNET(lagg_cloner)
99 static const char laggname[] = "lagg";
101 static void lagg_lladdr(struct lagg_softc *, uint8_t *);
102 static void lagg_capabilities(struct lagg_softc *);
103 static void lagg_port_lladdr(struct lagg_port *, uint8_t *);
104 static void lagg_port_setlladdr(void *, int);
105 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
106 static int lagg_port_destroy(struct lagg_port *, int);
107 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
108 static void lagg_linkstate(struct lagg_softc *);
109 static void lagg_port_state(struct ifnet *, int);
110 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
111 static int lagg_port_output(struct ifnet *, struct mbuf *,
112 const struct sockaddr *, struct route *);
113 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
114 #ifdef LAGG_PORT_STACKING
115 static int lagg_port_checkstacking(struct lagg_softc *);
117 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
118 static void lagg_init(void *);
119 static void lagg_stop(struct lagg_softc *);
120 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
121 static int lagg_ether_setmulti(struct lagg_softc *);
122 static int lagg_ether_cmdmulti(struct lagg_port *, int);
123 static int lagg_setflag(struct lagg_port *, int, int,
124 int (*func)(struct ifnet *, int));
125 static int lagg_setflags(struct lagg_port *, int status);
126 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt);
127 static int lagg_transmit(struct ifnet *, struct mbuf *);
128 static void lagg_qflush(struct ifnet *);
129 static int lagg_media_change(struct ifnet *);
130 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
131 static struct lagg_port *lagg_link_active(struct lagg_softc *,
134 /* Simple round robin */
135 static void lagg_rr_attach(struct lagg_softc *);
136 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
137 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
140 /* Active failover */
141 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
142 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
146 static void lagg_lb_attach(struct lagg_softc *);
147 static void lagg_lb_detach(struct lagg_softc *);
148 static int lagg_lb_port_create(struct lagg_port *);
149 static void lagg_lb_port_destroy(struct lagg_port *);
150 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
151 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
153 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
156 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *);
157 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *,
161 static void lagg_lacp_attach(struct lagg_softc *);
162 static void lagg_lacp_detach(struct lagg_softc *);
163 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
164 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
166 static void lagg_lacp_lladdr(struct lagg_softc *);
168 /* lagg protocol table */
169 static const struct lagg_proto {
171 void (*pr_attach)(struct lagg_softc *);
172 void (*pr_detach)(struct lagg_softc *);
173 int (*pr_start)(struct lagg_softc *, struct mbuf *);
174 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *,
176 int (*pr_addport)(struct lagg_port *);
177 void (*pr_delport)(struct lagg_port *);
178 void (*pr_linkstate)(struct lagg_port *);
179 void (*pr_init)(struct lagg_softc *);
180 void (*pr_stop)(struct lagg_softc *);
181 void (*pr_lladdr)(struct lagg_softc *);
182 void (*pr_request)(struct lagg_softc *, void *);
183 void (*pr_portreq)(struct lagg_port *, void *);
186 .pr_num = LAGG_PROTO_NONE
189 .pr_num = LAGG_PROTO_ROUNDROBIN,
190 .pr_attach = lagg_rr_attach,
191 .pr_start = lagg_rr_start,
192 .pr_input = lagg_rr_input,
195 .pr_num = LAGG_PROTO_FAILOVER,
196 .pr_start = lagg_fail_start,
197 .pr_input = lagg_fail_input,
200 .pr_num = LAGG_PROTO_LOADBALANCE,
201 .pr_attach = lagg_lb_attach,
202 .pr_detach = lagg_lb_detach,
203 .pr_start = lagg_lb_start,
204 .pr_input = lagg_lb_input,
205 .pr_addport = lagg_lb_port_create,
206 .pr_delport = lagg_lb_port_destroy,
209 .pr_num = LAGG_PROTO_LACP,
210 .pr_attach = lagg_lacp_attach,
211 .pr_detach = lagg_lacp_detach,
212 .pr_start = lagg_lacp_start,
213 .pr_input = lagg_lacp_input,
214 .pr_addport = lacp_port_create,
215 .pr_delport = lacp_port_destroy,
216 .pr_linkstate = lacp_linkstate,
217 .pr_init = lacp_init,
218 .pr_stop = lacp_stop,
219 .pr_lladdr = lagg_lacp_lladdr,
220 .pr_request = lacp_req,
221 .pr_portreq = lacp_portreq,
224 .pr_num = LAGG_PROTO_ETHERCHANNEL,
225 .pr_attach = lagg_lb_attach,
226 .pr_detach = lagg_lb_detach,
227 .pr_start = lagg_lb_start,
228 .pr_input = lagg_lb_input,
231 .pr_num = LAGG_PROTO_BROADCAST,
232 .pr_start = lagg_bcast_start,
233 .pr_input = lagg_bcast_input,
237 SYSCTL_DECL(_net_link);
238 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
241 /* Allow input on any failover links */
242 static VNET_DEFINE(int, lagg_failover_rx_all);
243 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
244 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
245 &VNET_NAME(lagg_failover_rx_all), 0,
246 "Accept input from any interface in a failover lagg");
248 /* Default value for using flowid */
249 static VNET_DEFINE(int, def_use_flowid) = 1;
250 #define V_def_use_flowid VNET(def_use_flowid)
251 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN,
252 &VNET_NAME(def_use_flowid), 0,
253 "Default setting for using flow id for load sharing");
255 /* Default value for flowid shift */
256 static VNET_DEFINE(int, def_flowid_shift) = 16;
257 #define V_def_flowid_shift VNET(def_flowid_shift)
258 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN,
259 &VNET_NAME(def_flowid_shift), 0,
260 "Default setting for flowid shift for load sharing");
263 vnet_lagg_init(const void *unused __unused)
266 LAGG_LIST_LOCK_INIT();
267 SLIST_INIT(&V_lagg_list);
268 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
269 lagg_clone_destroy, 0);
271 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
272 vnet_lagg_init, NULL);
275 vnet_lagg_uninit(const void *unused __unused)
278 if_clone_detach(V_lagg_cloner);
279 LAGG_LIST_LOCK_DESTROY();
281 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
282 vnet_lagg_uninit, NULL);
285 lagg_modevent(module_t mod, int type, void *data)
290 lagg_input_p = lagg_input;
291 lagg_linkstate_p = lagg_port_state;
292 lagg_detach_cookie = EVENTHANDLER_REGISTER(
293 ifnet_departure_event, lagg_port_ifdetach, NULL,
294 EVENTHANDLER_PRI_ANY);
297 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
300 lagg_linkstate_p = NULL;
308 static moduledata_t lagg_mod = {
314 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
315 MODULE_VERSION(if_lagg, 1);
318 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr)
321 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto",
324 if (sc->sc_ifflags & IFF_DEBUG)
325 if_printf(sc->sc_ifp, "using proto %u\n", pr);
327 if (lagg_protos[pr].pr_attach != NULL)
328 lagg_protos[pr].pr_attach(sc);
333 lagg_proto_detach(struct lagg_softc *sc)
337 LAGG_WLOCK_ASSERT(sc);
340 sc->sc_proto = LAGG_PROTO_NONE;
342 if (lagg_protos[pr].pr_detach != NULL)
343 lagg_protos[pr].pr_detach(sc);
349 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m)
352 return (lagg_protos[sc->sc_proto].pr_start(sc, m));
356 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
359 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m));
363 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp)
366 if (lagg_protos[sc->sc_proto].pr_addport == NULL)
369 return (lagg_protos[sc->sc_proto].pr_addport(lp));
373 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp)
376 if (lagg_protos[sc->sc_proto].pr_delport != NULL)
377 lagg_protos[sc->sc_proto].pr_delport(lp);
381 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp)
384 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL)
385 lagg_protos[sc->sc_proto].pr_linkstate(lp);
389 lagg_proto_init(struct lagg_softc *sc)
392 if (lagg_protos[sc->sc_proto].pr_init != NULL)
393 lagg_protos[sc->sc_proto].pr_init(sc);
397 lagg_proto_stop(struct lagg_softc *sc)
400 if (lagg_protos[sc->sc_proto].pr_stop != NULL)
401 lagg_protos[sc->sc_proto].pr_stop(sc);
405 lagg_proto_lladdr(struct lagg_softc *sc)
408 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL)
409 lagg_protos[sc->sc_proto].pr_lladdr(sc);
413 lagg_proto_request(struct lagg_softc *sc, void *v)
416 if (lagg_protos[sc->sc_proto].pr_request != NULL)
417 lagg_protos[sc->sc_proto].pr_request(sc, v);
421 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v)
424 if (lagg_protos[sc->sc_proto].pr_portreq != NULL)
425 lagg_protos[sc->sc_proto].pr_portreq(lp, v);
429 * This routine is run via an vlan
433 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
435 struct lagg_softc *sc = ifp->if_softc;
436 struct lagg_port *lp;
437 struct rm_priotracker tracker;
439 if (ifp->if_softc != arg) /* Not our event */
442 LAGG_RLOCK(sc, &tracker);
443 if (!SLIST_EMPTY(&sc->sc_ports)) {
444 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
445 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
447 LAGG_RUNLOCK(sc, &tracker);
451 * This routine is run via an vlan
455 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
457 struct lagg_softc *sc = ifp->if_softc;
458 struct lagg_port *lp;
459 struct rm_priotracker tracker;
461 if (ifp->if_softc != arg) /* Not our event */
464 LAGG_RLOCK(sc, &tracker);
465 if (!SLIST_EMPTY(&sc->sc_ports)) {
466 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
467 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
469 LAGG_RUNLOCK(sc, &tracker);
473 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
475 struct lagg_softc *sc;
477 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
479 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
480 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
486 if (V_def_use_flowid)
487 sc->sc_opts |= LAGG_OPT_USE_FLOWID;
488 sc->flowid_shift = V_def_flowid_shift;
490 /* Hash all layers by default */
491 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4;
493 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT);
496 SLIST_INIT(&sc->sc_ports);
497 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
499 /* Initialise pseudo media types */
500 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
502 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
503 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
505 if_initname(ifp, laggname, unit);
507 ifp->if_transmit = lagg_transmit;
508 ifp->if_qflush = lagg_qflush;
509 ifp->if_init = lagg_init;
510 ifp->if_ioctl = lagg_ioctl;
511 ifp->if_get_counter = lagg_get_counter;
512 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
513 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
516 * Attach as an ordinary ethernet device, children will be attached
517 * as special device IFT_IEEE8023ADLAG.
519 ether_ifattach(ifp, eaddr);
521 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
522 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
523 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
524 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
526 /* Insert into the global list of laggs */
528 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
535 lagg_clone_destroy(struct ifnet *ifp)
537 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
538 struct lagg_port *lp;
543 ifp->if_flags &= ~IFF_UP;
545 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
546 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
548 /* Shutdown and remove lagg ports */
549 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
550 lagg_port_destroy(lp, 1);
551 /* Unhook the aggregation protocol */
552 lagg_proto_detach(sc);
554 ifmedia_removeall(&sc->sc_media);
559 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
562 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
563 LAGG_LOCK_DESTROY(sc);
568 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
570 struct ifnet *ifp = sc->sc_ifp;
573 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
576 LAGG_WLOCK_ASSERT(sc);
578 * Set the link layer address on the lagg interface.
579 * lagg_proto_lladdr() notifies the MAC change to
580 * the aggregation protocol. iflladdr_event handler which
581 * may trigger gratuitous ARPs for INET will be handled in
584 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
585 lagg_proto_lladdr(sc);
587 bzero(&lp, sizeof(lp));
588 lp.lp_ifp = sc->sc_ifp;
591 lagg_port_lladdr(&lp, lladdr);
595 lagg_capabilities(struct lagg_softc *sc)
597 struct lagg_port *lp;
598 int cap = ~0, ena = ~0;
600 struct ifnet_hw_tsomax hw_tsomax;
602 LAGG_WLOCK_ASSERT(sc);
604 memset(&hw_tsomax, 0, sizeof(hw_tsomax));
606 /* Get capabilities from the lagg ports */
607 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
608 cap &= lp->lp_ifp->if_capabilities;
609 ena &= lp->lp_ifp->if_capenable;
610 hwa &= lp->lp_ifp->if_hwassist;
611 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
613 cap = (cap == ~0 ? 0 : cap);
614 ena = (ena == ~0 ? 0 : ena);
615 hwa = (hwa == ~0 ? 0 : hwa);
617 if (sc->sc_ifp->if_capabilities != cap ||
618 sc->sc_ifp->if_capenable != ena ||
619 sc->sc_ifp->if_hwassist != hwa ||
620 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
621 sc->sc_ifp->if_capabilities = cap;
622 sc->sc_ifp->if_capenable = ena;
623 sc->sc_ifp->if_hwassist = hwa;
624 getmicrotime(&sc->sc_ifp->if_lastchange);
626 if (sc->sc_ifflags & IFF_DEBUG)
627 if_printf(sc->sc_ifp,
628 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
633 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr)
635 struct lagg_softc *sc = lp->lp_softc;
636 struct ifnet *ifp = lp->lp_ifp;
637 struct lagg_llq *llq;
641 LAGG_WLOCK_ASSERT(sc);
643 primary = (sc->sc_primary->lp_ifp == ifp) ? 1 : 0;
644 if (primary == 0 && (lp->lp_detaching ||
645 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0))
648 /* Check to make sure its not already queued to be changed */
649 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
650 if (llq->llq_ifp == ifp) {
657 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT);
658 if (llq == NULL) /* XXX what to do */
662 /* Update the lladdr even if pending, it may have changed */
664 llq->llq_primary = primary;
665 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
668 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
670 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
674 * Set the interface MAC address from a taskqueue to avoid a LOR.
677 lagg_port_setlladdr(void *arg, int pending)
679 struct lagg_softc *sc = (struct lagg_softc *)arg;
680 struct lagg_llq *llq, *head;
684 /* Grab a local reference of the queue and remove it from the softc */
686 head = SLIST_FIRST(&sc->sc_llq_head);
687 SLIST_FIRST(&sc->sc_llq_head) = NULL;
691 * Traverse the queue and set the lladdr on each ifp. It is safe to do
692 * unlocked as we have the only reference to it.
694 for (llq = head; llq != NULL; llq = head) {
697 CURVNET_SET(ifp->if_vnet);
698 if (llq->llq_primary == 0) {
700 * Set the link layer address on the laggport interface.
701 * if_setlladdr() triggers gratuitous ARPs for INET.
703 error = if_setlladdr(ifp, llq->llq_lladdr,
706 printf("%s: setlladdr failed on %s\n", __func__,
709 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
711 head = SLIST_NEXT(llq, llq_entries);
717 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
719 struct lagg_softc *sc_ptr;
720 struct lagg_port *lp, *tlp;
724 LAGG_WLOCK_ASSERT(sc);
726 /* Limit the maximal number of lagg ports */
727 if (sc->sc_count >= LAGG_MAX_PORTS)
730 /* Check if port has already been associated to a lagg */
731 if (ifp->if_lagg != NULL) {
732 /* Port is already in the current lagg? */
733 lp = (struct lagg_port *)ifp->if_lagg;
734 if (lp->lp_softc == sc)
739 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
740 if (ifp->if_type != IFT_ETHER)
741 return (EPROTONOSUPPORT);
743 /* Allow the first Ethernet member to define the MTU */
744 if (SLIST_EMPTY(&sc->sc_ports))
745 sc->sc_ifp->if_mtu = ifp->if_mtu;
746 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
747 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
752 if ((lp = malloc(sizeof(struct lagg_port),
753 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
756 /* Check if port is a stacked lagg */
758 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
759 if (ifp == sc_ptr->sc_ifp) {
763 /* XXX disable stacking for the moment, its untested */
764 #ifdef LAGG_PORT_STACKING
765 lp->lp_flags |= LAGG_PORT_STACK;
766 if (lagg_port_checkstacking(sc_ptr) >=
777 /* Change the interface type */
778 lp->lp_iftype = ifp->if_type;
779 ifp->if_type = IFT_IEEE8023ADLAG;
781 lp->lp_ioctl = ifp->if_ioctl;
782 ifp->if_ioctl = lagg_port_ioctl;
783 lp->lp_output = ifp->if_output;
784 ifp->if_output = lagg_port_output;
789 /* Save port link layer address */
790 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
792 if (SLIST_EMPTY(&sc->sc_ports)) {
794 lagg_lladdr(sc, IF_LLADDR(ifp));
796 /* Update link layer address for this port */
797 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp));
801 * Insert into the list of ports.
802 * Keep ports sorted by if_index. It is handy, when configuration
803 * is predictable and `ifconfig laggN create ...` command
804 * will lead to the same result each time.
806 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
807 if (tlp->lp_ifp->if_index < ifp->if_index && (
808 SLIST_NEXT(tlp, lp_entries) == NULL ||
809 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index >
814 SLIST_INSERT_AFTER(tlp, lp, lp_entries);
816 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
819 /* Update lagg capabilities */
820 lagg_capabilities(sc);
823 /* Read port counters */
824 pval = lp->port_counters.val;
825 for (i = 0; i < IFCOUNTERS; i++, pval++)
826 *pval = ifp->if_get_counter(ifp, i);
827 /* Add multicast addresses and interface flags to this port */
828 lagg_ether_cmdmulti(lp, 1);
829 lagg_setflags(lp, 1);
831 if ((error = lagg_proto_addport(sc, lp)) != 0) {
832 /* Remove the port, without calling pr_delport. */
833 lagg_port_destroy(lp, 0);
840 #ifdef LAGG_PORT_STACKING
842 lagg_port_checkstacking(struct lagg_softc *sc)
844 struct lagg_softc *sc_ptr;
845 struct lagg_port *lp;
848 LAGG_WLOCK_ASSERT(sc);
850 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
851 if (lp->lp_flags & LAGG_PORT_STACK) {
852 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
853 m = MAX(m, lagg_port_checkstacking(sc_ptr));
862 lagg_port_destroy(struct lagg_port *lp, int rundelport)
864 struct lagg_softc *sc = lp->lp_softc;
865 struct lagg_port *lp_ptr;
866 struct lagg_llq *llq;
867 struct ifnet *ifp = lp->lp_ifp;
868 uint64_t *pval, vdiff;
871 LAGG_WLOCK_ASSERT(sc);
874 lagg_proto_delport(sc, lp);
877 * Remove multicast addresses and interface flags from this port and
878 * reset the MAC address, skip if the interface is being detached.
880 if (!lp->lp_detaching) {
881 lagg_ether_cmdmulti(lp, 0);
882 lagg_setflags(lp, 0);
883 lagg_port_lladdr(lp, lp->lp_lladdr);
886 /* Restore interface */
887 ifp->if_type = lp->lp_iftype;
888 ifp->if_ioctl = lp->lp_ioctl;
889 ifp->if_output = lp->lp_output;
892 /* Update detached port counters */
893 pval = lp->port_counters.val;
894 for (i = 0; i < IFCOUNTERS; i++, pval++) {
895 vdiff = ifp->if_get_counter(ifp, i) - *pval;
896 sc->detached_counters.val[i] += vdiff;
899 /* Finally, remove the port from the lagg */
900 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
903 /* Update the primary interface */
904 if (lp == sc->sc_primary) {
905 uint8_t lladdr[ETHER_ADDR_LEN];
907 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) {
908 bzero(&lladdr, ETHER_ADDR_LEN);
910 bcopy(lp_ptr->lp_lladdr,
911 lladdr, ETHER_ADDR_LEN);
913 lagg_lladdr(sc, lladdr);
914 sc->sc_primary = lp_ptr;
916 /* Update link layer address for each port */
917 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
918 lagg_port_lladdr(lp_ptr, lladdr);
921 /* Remove any pending lladdr changes from the queue */
922 if (lp->lp_detaching) {
923 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
924 if (llq->llq_ifp == ifp) {
925 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
928 break; /* Only appears once */
934 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
938 /* Update lagg capabilities */
939 lagg_capabilities(sc);
946 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
948 struct lagg_reqport *rp = (struct lagg_reqport *)data;
949 struct lagg_softc *sc;
950 struct lagg_port *lp = NULL;
952 struct rm_priotracker tracker;
954 /* Should be checked by the caller */
955 if (ifp->if_type != IFT_IEEE8023ADLAG ||
956 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
961 if (rp->rp_portname[0] == '\0' ||
962 ifunit(rp->rp_portname) != ifp) {
967 LAGG_RLOCK(sc, &tracker);
968 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
970 LAGG_RUNLOCK(sc, &tracker);
974 lagg_port2req(lp, rp);
975 LAGG_RUNLOCK(sc, &tracker);
979 if (lp->lp_ioctl == NULL) {
983 error = (*lp->lp_ioctl)(ifp, cmd, data);
987 /* Update lagg interface capabilities */
989 lagg_capabilities(sc);
994 /* Do not allow the MTU to be changed once joined */
1005 if (lp->lp_ioctl != NULL)
1006 return ((*lp->lp_ioctl)(ifp, cmd, data));
1012 * Requests counter @cnt data.
1014 * Counter value is calculated the following way:
1015 * 1) for each port, sum difference between current and "initial" measurements.
1016 * 2) add lagg logical interface counters.
1017 * 3) add data from detached_counters array.
1019 * We also do the following things on ports attach/detach:
1020 * 1) On port attach we store all counters it has into port_counter array.
1021 * 2) On port detach we add the different between "initial" and
1022 * current counters data to detached_counters array.
1025 lagg_get_counter(struct ifnet *ifp, ift_counter cnt)
1027 struct lagg_softc *sc;
1028 struct lagg_port *lp;
1029 struct ifnet *lpifp;
1030 struct rm_priotracker tracker;
1031 uint64_t newval, oldval, vsum;
1033 /* Revise this when we've got non-generic counters. */
1034 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1036 sc = (struct lagg_softc *)ifp->if_softc;
1037 LAGG_RLOCK(sc, &tracker);
1040 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1041 /* Saved attached value */
1042 oldval = lp->port_counters.val[cnt];
1045 newval = lpifp->if_get_counter(lpifp, cnt);
1046 /* Calculate diff and save new */
1047 vsum += newval - oldval;
1051 * Add counter data which might be added by upper
1052 * layer protocols operating on logical interface.
1054 vsum += if_get_counter_default(ifp, cnt);
1057 * Add counter data from detached ports counters
1059 vsum += sc->detached_counters.val[cnt];
1061 LAGG_RUNLOCK(sc, &tracker);
1067 * For direct output to child ports.
1070 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
1071 const struct sockaddr *dst, struct route *ro)
1073 struct lagg_port *lp = ifp->if_lagg;
1075 switch (dst->sa_family) {
1076 case pseudo_AF_HDRCMPLT:
1078 return ((*lp->lp_output)(ifp, m, dst, ro));
1081 /* drop any other frames */
1087 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
1089 struct lagg_port *lp;
1090 struct lagg_softc *sc;
1092 if ((lp = ifp->if_lagg) == NULL)
1094 /* If the ifnet is just being renamed, don't do anything. */
1095 if (ifp->if_flags & IFF_RENAMING)
1101 lp->lp_detaching = 1;
1102 lagg_port_destroy(lp, 1);
1107 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
1109 struct lagg_softc *sc = lp->lp_softc;
1111 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
1112 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
1113 rp->rp_prio = lp->lp_prio;
1114 rp->rp_flags = lp->lp_flags;
1115 lagg_proto_portreq(sc, lp, &rp->rp_psc);
1117 /* Add protocol specific flags */
1118 switch (sc->sc_proto) {
1119 case LAGG_PROTO_FAILOVER:
1120 if (lp == sc->sc_primary)
1121 rp->rp_flags |= LAGG_PORT_MASTER;
1122 if (lp == lagg_link_active(sc, sc->sc_primary))
1123 rp->rp_flags |= LAGG_PORT_ACTIVE;
1126 case LAGG_PROTO_ROUNDROBIN:
1127 case LAGG_PROTO_LOADBALANCE:
1128 case LAGG_PROTO_ETHERCHANNEL:
1129 case LAGG_PROTO_BROADCAST:
1130 if (LAGG_PORTACTIVE(lp))
1131 rp->rp_flags |= LAGG_PORT_ACTIVE;
1134 case LAGG_PROTO_LACP:
1135 /* LACP has a different definition of active */
1136 if (lacp_isactive(lp))
1137 rp->rp_flags |= LAGG_PORT_ACTIVE;
1138 if (lacp_iscollecting(lp))
1139 rp->rp_flags |= LAGG_PORT_COLLECTING;
1140 if (lacp_isdistributing(lp))
1141 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
1148 lagg_init(void *xsc)
1150 struct lagg_softc *sc = (struct lagg_softc *)xsc;
1151 struct lagg_port *lp;
1152 struct ifnet *ifp = sc->sc_ifp;
1154 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1159 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1160 /* Update the port lladdrs */
1161 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1162 lagg_port_lladdr(lp, IF_LLADDR(ifp));
1164 lagg_proto_init(sc);
1170 lagg_stop(struct lagg_softc *sc)
1172 struct ifnet *ifp = sc->sc_ifp;
1174 LAGG_WLOCK_ASSERT(sc);
1176 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1179 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1181 lagg_proto_stop(sc);
1185 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1187 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1188 struct lagg_reqall *ra = (struct lagg_reqall *)data;
1189 struct lagg_reqopts *ro = (struct lagg_reqopts *)data;
1190 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
1191 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
1192 struct ifreq *ifr = (struct ifreq *)data;
1193 struct lagg_port *lp;
1195 struct thread *td = curthread;
1197 int count, buflen, len, error = 0;
1198 struct rm_priotracker tracker;
1200 bzero(&rpbuf, sizeof(rpbuf));
1204 LAGG_RLOCK(sc, &tracker);
1206 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1208 buflen = count * sizeof(struct lagg_reqport);
1209 LAGG_RUNLOCK(sc, &tracker);
1211 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1213 LAGG_RLOCK(sc, &tracker);
1214 ra->ra_proto = sc->sc_proto;
1215 lagg_proto_request(sc, &ra->ra_psc);
1218 len = min(ra->ra_size, buflen);
1219 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1220 if (len < sizeof(rpbuf))
1223 lagg_port2req(lp, &rpbuf);
1224 memcpy(buf, &rpbuf, sizeof(rpbuf));
1226 buf += sizeof(rpbuf);
1227 len -= sizeof(rpbuf);
1229 LAGG_RUNLOCK(sc, &tracker);
1230 ra->ra_ports = count;
1231 ra->ra_size = count * sizeof(rpbuf);
1232 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1233 free(outbuf, M_TEMP);
1236 error = priv_check(td, PRIV_NET_LAGG);
1239 if (ra->ra_proto < 1 || ra->ra_proto >= LAGG_PROTO_MAX) {
1240 error = EPROTONOSUPPORT;
1245 lagg_proto_detach(sc);
1246 lagg_proto_attach(sc, ra->ra_proto);
1249 ro->ro_opts = sc->sc_opts;
1250 if (sc->sc_proto == LAGG_PROTO_LACP) {
1251 struct lacp_softc *lsc;
1253 lsc = (struct lacp_softc *)sc->sc_psc;
1254 if (lsc->lsc_debug.lsc_tx_test != 0)
1255 ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
1256 if (lsc->lsc_debug.lsc_rx_test != 0)
1257 ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
1258 if (lsc->lsc_strict_mode != 0)
1259 ro->ro_opts |= LAGG_OPT_LACP_STRICT;
1261 ro->ro_active = sc->sc_active;
1264 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1265 ro->ro_active += LAGG_PORTACTIVE(lp);
1267 ro->ro_flapping = sc->sc_flapping;
1268 ro->ro_flowid_shift = sc->flowid_shift;
1271 error = priv_check(td, PRIV_NET_LAGG);
1274 if (ro->ro_opts == 0)
1277 * Set options. LACP options are stored in sc->sc_psc,
1282 switch (ro->ro_opts) {
1283 case LAGG_OPT_USE_FLOWID:
1284 case -LAGG_OPT_USE_FLOWID:
1285 case LAGG_OPT_FLOWIDSHIFT:
1289 case LAGG_OPT_LACP_TXTEST:
1290 case -LAGG_OPT_LACP_TXTEST:
1291 case LAGG_OPT_LACP_RXTEST:
1292 case -LAGG_OPT_LACP_RXTEST:
1293 case LAGG_OPT_LACP_STRICT:
1294 case -LAGG_OPT_LACP_STRICT:
1304 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
1305 /* Invalid combination of options specified. */
1308 break; /* Return from SIOCSLAGGOPTS. */
1311 * Store new options into sc->sc_opts except for
1312 * FLOWIDSHIFT and LACP options.
1315 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
1316 sc->flowid_shift = ro->ro_flowid_shift;
1317 else if (ro->ro_opts > 0)
1318 sc->sc_opts |= ro->ro_opts;
1320 sc->sc_opts &= ~ro->ro_opts;
1322 struct lacp_softc *lsc;
1324 lsc = (struct lacp_softc *)sc->sc_psc;
1326 switch (ro->ro_opts) {
1327 case LAGG_OPT_LACP_TXTEST:
1328 lsc->lsc_debug.lsc_tx_test = 1;
1330 case -LAGG_OPT_LACP_TXTEST:
1331 lsc->lsc_debug.lsc_tx_test = 0;
1333 case LAGG_OPT_LACP_RXTEST:
1334 lsc->lsc_debug.lsc_rx_test = 1;
1336 case -LAGG_OPT_LACP_RXTEST:
1337 lsc->lsc_debug.lsc_rx_test = 0;
1339 case LAGG_OPT_LACP_STRICT:
1340 lsc->lsc_strict_mode = 1;
1342 case -LAGG_OPT_LACP_STRICT:
1343 lsc->lsc_strict_mode = 0;
1349 case SIOCGLAGGFLAGS:
1351 LAGG_RLOCK(sc, &tracker);
1352 if (sc->sc_flags & MBUF_HASHFLAG_L2)
1353 rf->rf_flags |= LAGG_F_HASHL2;
1354 if (sc->sc_flags & MBUF_HASHFLAG_L3)
1355 rf->rf_flags |= LAGG_F_HASHL3;
1356 if (sc->sc_flags & MBUF_HASHFLAG_L4)
1357 rf->rf_flags |= LAGG_F_HASHL4;
1358 LAGG_RUNLOCK(sc, &tracker);
1361 error = priv_check(td, PRIV_NET_LAGG);
1364 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1370 if (rf->rf_flags & LAGG_F_HASHL2)
1371 sc->sc_flags |= MBUF_HASHFLAG_L2;
1372 if (rf->rf_flags & LAGG_F_HASHL3)
1373 sc->sc_flags |= MBUF_HASHFLAG_L3;
1374 if (rf->rf_flags & LAGG_F_HASHL4)
1375 sc->sc_flags |= MBUF_HASHFLAG_L4;
1379 if (rp->rp_portname[0] == '\0' ||
1380 (tpif = ifunit(rp->rp_portname)) == NULL) {
1385 LAGG_RLOCK(sc, &tracker);
1386 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1387 lp->lp_softc != sc) {
1389 LAGG_RUNLOCK(sc, &tracker);
1393 lagg_port2req(lp, rp);
1394 LAGG_RUNLOCK(sc, &tracker);
1397 error = priv_check(td, PRIV_NET_LAGG);
1400 if (rp->rp_portname[0] == '\0' ||
1401 (tpif = ifunit(rp->rp_portname)) == NULL) {
1407 * A laggport interface should not have inet6 address
1408 * because two interfaces with a valid link-local
1409 * scope zone must not be merged in any form. This
1410 * restriction is needed to prevent violation of
1411 * link-local scope zone. Attempts to add a laggport
1412 * interface which has inet6 addresses triggers
1413 * removal of all inet6 addresses on the member
1416 if (in6ifa_llaonifp(tpif)) {
1418 if_printf(sc->sc_ifp,
1419 "IPv6 addresses on %s have been removed "
1420 "before adding it as a member to prevent "
1421 "IPv6 address scope violation.\n",
1426 error = lagg_port_create(sc, tpif);
1429 case SIOCSLAGGDELPORT:
1430 error = priv_check(td, PRIV_NET_LAGG);
1433 if (rp->rp_portname[0] == '\0' ||
1434 (tpif = ifunit(rp->rp_portname)) == NULL) {
1440 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1441 lp->lp_softc != sc) {
1447 error = lagg_port_destroy(lp, 1);
1451 /* Set flags on ports too */
1453 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1454 lagg_setflags(lp, 1);
1458 if (!(ifp->if_flags & IFF_UP) &&
1459 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1461 * If interface is marked down and it is running,
1462 * then stop and disable it.
1467 } else if ((ifp->if_flags & IFF_UP) &&
1468 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1470 * If interface is marked up and it is stopped, then
1473 (*ifp->if_init)(sc);
1479 error = lagg_ether_setmulti(sc);
1484 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1489 /* Do not allow the MTU or caps to be directly changed */
1494 error = ether_ioctl(ifp, cmd, data);
1501 lagg_ether_setmulti(struct lagg_softc *sc)
1503 struct lagg_port *lp;
1505 LAGG_WLOCK_ASSERT(sc);
1507 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1508 /* First, remove any existing filter entries. */
1509 lagg_ether_cmdmulti(lp, 0);
1510 /* copy all addresses from the lagg interface to the port */
1511 lagg_ether_cmdmulti(lp, 1);
1517 lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1519 struct lagg_softc *sc = lp->lp_softc;
1520 struct ifnet *ifp = lp->lp_ifp;
1521 struct ifnet *scifp = sc->sc_ifp;
1523 struct ifmultiaddr *ifma;
1526 LAGG_WLOCK_ASSERT(sc);
1529 IF_ADDR_WLOCK(scifp);
1530 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1531 if (ifma->ifma_addr->sa_family != AF_LINK)
1533 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1535 IF_ADDR_WUNLOCK(scifp);
1538 bcopy(ifma->ifma_addr, &mc->mc_addr,
1539 ifma->ifma_addr->sa_len);
1540 mc->mc_addr.sdl_index = ifp->if_index;
1542 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1544 IF_ADDR_WUNLOCK(scifp);
1545 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
1546 error = if_addmulti(ifp,
1547 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
1552 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1553 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1554 if (mc->mc_ifma && !lp->lp_detaching)
1555 if_delmulti_ifma(mc->mc_ifma);
1562 /* Handle a ref counted flag that should be set on the lagg port as well */
1564 lagg_setflag(struct lagg_port *lp, int flag, int status,
1565 int (*func)(struct ifnet *, int))
1567 struct lagg_softc *sc = lp->lp_softc;
1568 struct ifnet *scifp = sc->sc_ifp;
1569 struct ifnet *ifp = lp->lp_ifp;
1572 LAGG_WLOCK_ASSERT(sc);
1574 status = status ? (scifp->if_flags & flag) : 0;
1575 /* Now "status" contains the flag value or 0 */
1578 * See if recorded ports status is different from what
1579 * we want it to be. If it is, flip it. We record ports
1580 * status in lp_ifflags so that we won't clear ports flag
1581 * we haven't set. In fact, we don't clear or set ports
1582 * flags directly, but get or release references to them.
1583 * That's why we can be sure that recorded flags still are
1584 * in accord with actual ports flags.
1586 if (status != (lp->lp_ifflags & flag)) {
1587 error = (*func)(ifp, status);
1590 lp->lp_ifflags &= ~flag;
1591 lp->lp_ifflags |= status;
1597 * Handle IFF_* flags that require certain changes on the lagg port
1598 * if "status" is true, update ports flags respective to the lagg
1599 * if "status" is false, forcedly clear the flags set on port.
1602 lagg_setflags(struct lagg_port *lp, int status)
1606 for (i = 0; lagg_pflags[i].flag; i++) {
1607 error = lagg_setflag(lp, lagg_pflags[i].flag,
1608 status, lagg_pflags[i].func);
1616 lagg_transmit(struct ifnet *ifp, struct mbuf *m)
1618 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1619 int error, len, mcast;
1620 struct rm_priotracker tracker;
1622 len = m->m_pkthdr.len;
1623 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
1625 LAGG_RLOCK(sc, &tracker);
1626 /* We need a Tx algorithm and at least one port */
1627 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
1628 LAGG_RUNLOCK(sc, &tracker);
1630 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1634 ETHER_BPF_MTAP(ifp, m);
1636 error = lagg_proto_start(sc, m);
1637 LAGG_RUNLOCK(sc, &tracker);
1640 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1646 * The ifp->if_qflush entry point for lagg(4) is no-op.
1649 lagg_qflush(struct ifnet *ifp __unused)
1653 static struct mbuf *
1654 lagg_input(struct ifnet *ifp, struct mbuf *m)
1656 struct lagg_port *lp = ifp->if_lagg;
1657 struct lagg_softc *sc = lp->lp_softc;
1658 struct ifnet *scifp = sc->sc_ifp;
1659 struct rm_priotracker tracker;
1661 LAGG_RLOCK(sc, &tracker);
1662 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1663 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1664 sc->sc_proto == LAGG_PROTO_NONE) {
1665 LAGG_RUNLOCK(sc, &tracker);
1670 ETHER_BPF_MTAP(scifp, m);
1672 if (lp->lp_detaching != 0) {
1676 m = lagg_proto_input(sc, lp, m);
1679 if (scifp->if_flags & IFF_MONITOR) {
1685 LAGG_RUNLOCK(sc, &tracker);
1690 lagg_media_change(struct ifnet *ifp)
1692 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1694 if (sc->sc_ifflags & IFF_DEBUG)
1695 printf("%s\n", __func__);
1702 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1704 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1705 struct lagg_port *lp;
1706 struct rm_priotracker tracker;
1708 imr->ifm_status = IFM_AVALID;
1709 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1711 LAGG_RLOCK(sc, &tracker);
1712 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1713 if (LAGG_PORTACTIVE(lp))
1714 imr->ifm_status |= IFM_ACTIVE;
1716 LAGG_RUNLOCK(sc, &tracker);
1720 lagg_linkstate(struct lagg_softc *sc)
1722 struct lagg_port *lp;
1723 int new_link = LINK_STATE_DOWN;
1726 /* Our link is considered up if at least one of our ports is active */
1727 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1728 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) {
1729 new_link = LINK_STATE_UP;
1733 if_link_state_change(sc->sc_ifp, new_link);
1735 /* Update if_baudrate to reflect the max possible speed */
1736 switch (sc->sc_proto) {
1737 case LAGG_PROTO_FAILOVER:
1738 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
1739 sc->sc_primary->lp_ifp->if_baudrate : 0;
1741 case LAGG_PROTO_ROUNDROBIN:
1742 case LAGG_PROTO_LOADBALANCE:
1743 case LAGG_PROTO_ETHERCHANNEL:
1744 case LAGG_PROTO_BROADCAST:
1746 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1747 speed += lp->lp_ifp->if_baudrate;
1748 sc->sc_ifp->if_baudrate = speed;
1750 case LAGG_PROTO_LACP:
1751 /* LACP updates if_baudrate itself */
1757 lagg_port_state(struct ifnet *ifp, int state)
1759 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1760 struct lagg_softc *sc = NULL;
1769 lagg_proto_linkstate(sc, lp);
1774 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1776 struct lagg_port *lp_next, *rval = NULL;
1777 // int new_link = LINK_STATE_DOWN;
1779 LAGG_RLOCK_ASSERT(sc);
1781 * Search a port which reports an active link state.
1786 if (LAGG_PORTACTIVE(lp)) {
1790 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1791 LAGG_PORTACTIVE(lp_next)) {
1797 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1798 if (LAGG_PORTACTIVE(lp_next)) {
1807 * The IEEE 802.1D standard assumes that a lagg with
1808 * multiple ports is always full duplex. This is valid
1809 * for load sharing laggs and if at least two links
1810 * are active. Unfortunately, checking the latter would
1811 * be too expensive at this point.
1813 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1815 new_link = LINK_STATE_FULL_DUPLEX;
1817 new_link = rval->lp_link_state;
1825 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1828 return (ifp->if_transmit)(ifp, m);
1832 * Simple round robin aggregation
1835 lagg_rr_attach(struct lagg_softc *sc)
1837 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1842 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1844 struct lagg_port *lp;
1847 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1849 lp = SLIST_FIRST(&sc->sc_ports);
1851 lp = SLIST_NEXT(lp, lp_entries);
1854 * Check the port's link state. This will return the next active
1855 * port if the link is down or the port is NULL.
1857 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1863 return (lagg_enqueue(lp->lp_ifp, m));
1866 static struct mbuf *
1867 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1869 struct ifnet *ifp = sc->sc_ifp;
1871 /* Just pass in the packet to our lagg device */
1872 m->m_pkthdr.rcvif = ifp;
1881 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m)
1883 int active_ports = 0;
1886 struct lagg_port *lp, *last = NULL;
1889 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1890 if (!LAGG_PORTACTIVE(lp))
1896 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT);
1903 ret = lagg_enqueue(last->lp_ifp, m0);
1913 if ((last = lagg_link_active(sc, last)) == NULL) {
1918 ret = lagg_enqueue(last->lp_ifp, m);
1929 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1931 struct ifnet *ifp = sc->sc_ifp;
1933 /* Just pass in the packet to our lagg device */
1934 m->m_pkthdr.rcvif = ifp;
1942 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
1944 struct lagg_port *lp;
1946 /* Use the master port if active or the next available port */
1947 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
1953 return (lagg_enqueue(lp->lp_ifp, m));
1956 static struct mbuf *
1957 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1959 struct ifnet *ifp = sc->sc_ifp;
1960 struct lagg_port *tmp_tp;
1962 if (lp == sc->sc_primary || V_lagg_failover_rx_all) {
1963 m->m_pkthdr.rcvif = ifp;
1967 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
1968 tmp_tp = lagg_link_active(sc, sc->sc_primary);
1970 * If tmp_tp is null, we've recieved a packet when all
1971 * our links are down. Weird, but process it anyways.
1973 if ((tmp_tp == NULL || tmp_tp == lp)) {
1974 m->m_pkthdr.rcvif = ifp;
1987 lagg_lb_attach(struct lagg_softc *sc)
1989 struct lagg_port *lp;
1992 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO);
1994 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1996 lb->lb_key = m_ether_tcpip_hash_init();
1999 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2000 lagg_lb_port_create(lp);
2004 lagg_lb_detach(struct lagg_softc *sc)
2008 lb = (struct lagg_lb *)sc->sc_psc;
2015 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
2017 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2018 struct lagg_port *lp_next;
2021 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
2022 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2025 if (i >= LAGG_MAX_PORTS)
2027 if (sc->sc_ifflags & IFF_DEBUG)
2028 printf("%s: port %s at index %d\n",
2029 sc->sc_ifname, lp_next->lp_ifp->if_xname, i);
2030 lb->lb_ports[i++] = lp_next;
2037 lagg_lb_port_create(struct lagg_port *lp)
2039 struct lagg_softc *sc = lp->lp_softc;
2040 return (lagg_lb_porttable(sc, NULL));
2044 lagg_lb_port_destroy(struct lagg_port *lp)
2046 struct lagg_softc *sc = lp->lp_softc;
2047 lagg_lb_porttable(sc, lp);
2051 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
2053 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2054 struct lagg_port *lp = NULL;
2057 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
2058 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
2059 p = m->m_pkthdr.flowid >> sc->flowid_shift;
2061 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key);
2063 lp = lb->lb_ports[p];
2066 * Check the port's link state. This will return the next active
2067 * port if the link is down or the port is NULL.
2069 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2075 return (lagg_enqueue(lp->lp_ifp, m));
2078 static struct mbuf *
2079 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2081 struct ifnet *ifp = sc->sc_ifp;
2083 /* Just pass in the packet to our lagg device */
2084 m->m_pkthdr.rcvif = ifp;
2093 lagg_lacp_attach(struct lagg_softc *sc)
2095 struct lagg_port *lp;
2098 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2099 lacp_port_create(lp);
2103 lagg_lacp_detach(struct lagg_softc *sc)
2105 struct lagg_port *lp;
2108 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2109 lacp_port_destroy(lp);
2119 lagg_lacp_lladdr(struct lagg_softc *sc)
2121 struct lagg_port *lp;
2123 /* purge all the lacp ports */
2124 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2125 lacp_port_destroy(lp);
2127 /* add them back in */
2128 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2129 lacp_port_create(lp);
2133 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
2135 struct lagg_port *lp;
2137 lp = lacp_select_tx_port(sc, m);
2144 return (lagg_enqueue(lp->lp_ifp, m));
2147 static struct mbuf *
2148 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2150 struct ifnet *ifp = sc->sc_ifp;
2151 struct ether_header *eh;
2154 eh = mtod(m, struct ether_header *);
2155 etype = ntohs(eh->ether_type);
2157 /* Tap off LACP control messages */
2158 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
2159 m = lacp_input(lp, m);
2165 * If the port is not collecting or not in the active aggregator then
2168 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
2173 m->m_pkthdr.rcvif = ifp;