23
24#include "opt_inet.h"
25#include "opt_inet6.h"
26
27#include <sys/param.h>
28#include <sys/kernel.h>
29#include <sys/malloc.h>
30#include <sys/mbuf.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>
36#include <sys/priv.h>
37#include <sys/systm.h>
38#include <sys/proc.h>
39#include <sys/lock.h>
40#include <sys/rmlock.h>
41#include <sys/taskqueue.h>
42#include <sys/eventhandler.h>
43
44#include <net/ethernet.h>
45#include <net/if.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>
52#include <net/bpf.h>
53#include <net/vnet.h>
54
55#if defined(INET) || defined(INET6)
56#include <netinet/in.h>
57#include <netinet/ip.h>
58#endif
59#ifdef INET
60#include <netinet/in_systm.h>
61#include <netinet/if_ether.h>
62#endif
63
64#ifdef INET6
65#include <netinet/ip6.h>
66#include <netinet6/in6_var.h>
67#include <netinet6/in6_ifattach.h>
68#endif
69
70#include <net/if_vlan_var.h>
71#include <net/if_lagg.h>
72#include <net/ieee8023ad_lacp.h>
73
74/* Special flags we should propagate to the lagg ports. */
75static struct {
76 int flag;
77 int (*func)(struct ifnet *, int);
78} lagg_pflags[] = {
79 {IFF_PROMISC, ifpromisc},
80 {IFF_ALLMULTI, if_allmulti},
81 {0, NULL}
82};
83
84VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
85#define V_lagg_list VNET(lagg_list)
86static 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)
93eventhandler_tag lagg_detach_cookie = NULL;
94
95static int lagg_clone_create(struct if_clone *, int, caddr_t);
96static void lagg_clone_destroy(struct ifnet *);
97static VNET_DEFINE(struct if_clone *, lagg_cloner);
98#define V_lagg_cloner VNET(lagg_cloner)
99static const char laggname[] = "lagg";
100
101static void lagg_lladdr(struct lagg_softc *, uint8_t *);
102static void lagg_capabilities(struct lagg_softc *);
103static void lagg_port_lladdr(struct lagg_port *, uint8_t *, lagg_llqtype);
104static void lagg_port_setlladdr(void *, int);
105static int lagg_port_create(struct lagg_softc *, struct ifnet *);
106static int lagg_port_destroy(struct lagg_port *, int);
107static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
108static void lagg_linkstate(struct lagg_softc *);
109static void lagg_port_state(struct ifnet *, int);
110static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
111static int lagg_port_output(struct ifnet *, struct mbuf *,
112 const struct sockaddr *, struct route *);
113static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
114#ifdef LAGG_PORT_STACKING
115static int lagg_port_checkstacking(struct lagg_softc *);
116#endif
117static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
118static void lagg_init(void *);
119static void lagg_stop(struct lagg_softc *);
120static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
121static int lagg_ether_setmulti(struct lagg_softc *);
122static int lagg_ether_cmdmulti(struct lagg_port *, int);
123static int lagg_setflag(struct lagg_port *, int, int,
124 int (*func)(struct ifnet *, int));
125static int lagg_setflags(struct lagg_port *, int status);
126static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt);
127static int lagg_transmit(struct ifnet *, struct mbuf *);
128static void lagg_qflush(struct ifnet *);
129static int lagg_media_change(struct ifnet *);
130static void lagg_media_status(struct ifnet *, struct ifmediareq *);
131static struct lagg_port *lagg_link_active(struct lagg_softc *,
132 struct lagg_port *);
133
134/* Simple round robin */
135static void lagg_rr_attach(struct lagg_softc *);
136static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
137static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
138 struct mbuf *);
139
140/* Active failover */
141static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
142static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
143 struct mbuf *);
144
145/* Loadbalancing */
146static void lagg_lb_attach(struct lagg_softc *);
147static void lagg_lb_detach(struct lagg_softc *);
148static int lagg_lb_port_create(struct lagg_port *);
149static void lagg_lb_port_destroy(struct lagg_port *);
150static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
151static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
152 struct mbuf *);
153static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
154
155/* Broadcast */
156static int lagg_bcast_start(struct lagg_softc *, struct mbuf *);
157static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *,
158 struct mbuf *);
159
160/* 802.3ad LACP */
161static void lagg_lacp_attach(struct lagg_softc *);
162static void lagg_lacp_detach(struct lagg_softc *);
163static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
164static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
165 struct mbuf *);
166static void lagg_lacp_lladdr(struct lagg_softc *);
167
168/* lagg protocol table */
169static const struct lagg_proto {
170 lagg_proto pr_num;
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 *,
175 struct mbuf *);
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 *);
184} lagg_protos[] = {
185 {
186 .pr_num = LAGG_PROTO_NONE
187 },
188 {
189 .pr_num = LAGG_PROTO_ROUNDROBIN,
190 .pr_attach = lagg_rr_attach,
191 .pr_start = lagg_rr_start,
192 .pr_input = lagg_rr_input,
193 },
194 {
195 .pr_num = LAGG_PROTO_FAILOVER,
196 .pr_start = lagg_fail_start,
197 .pr_input = lagg_fail_input,
198 },
199 {
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,
207 },
208 {
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,
222 },
223 {
224 .pr_num = LAGG_PROTO_BROADCAST,
225 .pr_start = lagg_bcast_start,
226 .pr_input = lagg_bcast_input,
227 },
228};
229
230SYSCTL_DECL(_net_link);
231SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
232 "Link Aggregation");
233
234/* Allow input on any failover links */
235static VNET_DEFINE(int, lagg_failover_rx_all);
236#define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
237SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
238 &VNET_NAME(lagg_failover_rx_all), 0,
239 "Accept input from any interface in a failover lagg");
240
241/* Default value for using flowid */
242static VNET_DEFINE(int, def_use_flowid) = 1;
243#define V_def_use_flowid VNET(def_use_flowid)
244SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN,
245 &VNET_NAME(def_use_flowid), 0,
246 "Default setting for using flow id for load sharing");
247
248/* Default value for flowid shift */
249static VNET_DEFINE(int, def_flowid_shift) = 16;
250#define V_def_flowid_shift VNET(def_flowid_shift)
251SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN,
252 &VNET_NAME(def_flowid_shift), 0,
253 "Default setting for flowid shift for load sharing");
254
255static void
256vnet_lagg_init(const void *unused __unused)
257{
258
259 LAGG_LIST_LOCK_INIT();
260 SLIST_INIT(&V_lagg_list);
261 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
262 lagg_clone_destroy, 0);
263}
264VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
265 vnet_lagg_init, NULL);
266
267static void
268vnet_lagg_uninit(const void *unused __unused)
269{
270
271 if_clone_detach(V_lagg_cloner);
272 LAGG_LIST_LOCK_DESTROY();
273}
274VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
275 vnet_lagg_uninit, NULL);
276
277static int
278lagg_modevent(module_t mod, int type, void *data)
279{
280
281 switch (type) {
282 case MOD_LOAD:
283 lagg_input_p = lagg_input;
284 lagg_linkstate_p = lagg_port_state;
285 lagg_detach_cookie = EVENTHANDLER_REGISTER(
286 ifnet_departure_event, lagg_port_ifdetach, NULL,
287 EVENTHANDLER_PRI_ANY);
288 break;
289 case MOD_UNLOAD:
290 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
291 lagg_detach_cookie);
292 lagg_input_p = NULL;
293 lagg_linkstate_p = NULL;
294 break;
295 default:
296 return (EOPNOTSUPP);
297 }
298 return (0);
299}
300
301static moduledata_t lagg_mod = {
302 "if_lagg",
303 lagg_modevent,
304 0
305};
306
307DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
308MODULE_VERSION(if_lagg, 1);
309
310static void
311lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr)
312{
313
314 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto",
315 __func__, sc));
316
317 if (sc->sc_ifflags & IFF_DEBUG)
318 if_printf(sc->sc_ifp, "using proto %u\n", pr);
319
320 if (lagg_protos[pr].pr_attach != NULL)
321 lagg_protos[pr].pr_attach(sc);
322 sc->sc_proto = pr;
323}
324
325static void
326lagg_proto_detach(struct lagg_softc *sc)
327{
328 lagg_proto pr;
329
330 LAGG_WLOCK_ASSERT(sc);
331
332 pr = sc->sc_proto;
333 sc->sc_proto = LAGG_PROTO_NONE;
334
335 if (lagg_protos[pr].pr_detach != NULL)
336 lagg_protos[pr].pr_detach(sc);
337 else
338 LAGG_WUNLOCK(sc);
339}
340
341static int
342lagg_proto_start(struct lagg_softc *sc, struct mbuf *m)
343{
344
345 return (lagg_protos[sc->sc_proto].pr_start(sc, m));
346}
347
348static struct mbuf *
349lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
350{
351
352 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m));
353}
354
355static int
356lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp)
357{
358
359 if (lagg_protos[sc->sc_proto].pr_addport == NULL)
360 return (0);
361 else
362 return (lagg_protos[sc->sc_proto].pr_addport(lp));
363}
364
365static void
366lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp)
367{
368
369 if (lagg_protos[sc->sc_proto].pr_delport != NULL)
370 lagg_protos[sc->sc_proto].pr_delport(lp);
371}
372
373static void
374lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp)
375{
376
377 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL)
378 lagg_protos[sc->sc_proto].pr_linkstate(lp);
379}
380
381static void
382lagg_proto_init(struct lagg_softc *sc)
383{
384
385 if (lagg_protos[sc->sc_proto].pr_init != NULL)
386 lagg_protos[sc->sc_proto].pr_init(sc);
387}
388
389static void
390lagg_proto_stop(struct lagg_softc *sc)
391{
392
393 if (lagg_protos[sc->sc_proto].pr_stop != NULL)
394 lagg_protos[sc->sc_proto].pr_stop(sc);
395}
396
397static void
398lagg_proto_lladdr(struct lagg_softc *sc)
399{
400
401 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL)
402 lagg_protos[sc->sc_proto].pr_lladdr(sc);
403}
404
405static void
406lagg_proto_request(struct lagg_softc *sc, void *v)
407{
408
409 if (lagg_protos[sc->sc_proto].pr_request != NULL)
410 lagg_protos[sc->sc_proto].pr_request(sc, v);
411}
412
413static void
414lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v)
415{
416
417 if (lagg_protos[sc->sc_proto].pr_portreq != NULL)
418 lagg_protos[sc->sc_proto].pr_portreq(lp, v);
419}
420
421/*
422 * This routine is run via an vlan
423 * config EVENT
424 */
425static void
426lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
427{
428 struct lagg_softc *sc = ifp->if_softc;
429 struct lagg_port *lp;
430 struct rm_priotracker tracker;
431
432 if (ifp->if_softc != arg) /* Not our event */
433 return;
434
435 LAGG_RLOCK(sc, &tracker);
436 if (!SLIST_EMPTY(&sc->sc_ports)) {
437 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
438 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
439 }
440 LAGG_RUNLOCK(sc, &tracker);
441}
442
443/*
444 * This routine is run via an vlan
445 * unconfig EVENT
446 */
447static void
448lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
449{
450 struct lagg_softc *sc = ifp->if_softc;
451 struct lagg_port *lp;
452 struct rm_priotracker tracker;
453
454 if (ifp->if_softc != arg) /* Not our event */
455 return;
456
457 LAGG_RLOCK(sc, &tracker);
458 if (!SLIST_EMPTY(&sc->sc_ports)) {
459 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
460 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
461 }
462 LAGG_RUNLOCK(sc, &tracker);
463}
464
465static int
466lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
467{
468 struct lagg_softc *sc;
469 struct ifnet *ifp;
470 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
471
472 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
473 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
474 if (ifp == NULL) {
475 free(sc, M_DEVBUF);
476 return (ENOSPC);
477 }
478
479 if (V_def_use_flowid)
480 sc->sc_opts |= LAGG_OPT_USE_FLOWID;
481 sc->flowid_shift = V_def_flowid_shift;
482
483 /* Hash all layers by default */
484 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4;
485
486 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT);
487
488 LAGG_LOCK_INIT(sc);
489 SLIST_INIT(&sc->sc_ports);
490 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
491
492 /* Initialise pseudo media types */
493 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
494 lagg_media_status);
495 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
496 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
497
498 if_initname(ifp, laggname, unit);
499 ifp->if_softc = sc;
500 ifp->if_transmit = lagg_transmit;
501 ifp->if_qflush = lagg_qflush;
502 ifp->if_init = lagg_init;
503 ifp->if_ioctl = lagg_ioctl;
504 ifp->if_get_counter = lagg_get_counter;
505 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
506 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
507
508 /*
509 * Attach as an ordinary ethernet device, children will be attached
510 * as special device IFT_IEEE8023ADLAG.
511 */
512 ether_ifattach(ifp, eaddr);
513
514 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
515 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
516 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
517 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
518
519 /* Insert into the global list of laggs */
520 LAGG_LIST_LOCK();
521 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
522 LAGG_LIST_UNLOCK();
523
524 return (0);
525}
526
527static void
528lagg_clone_destroy(struct ifnet *ifp)
529{
530 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
531 struct lagg_port *lp;
532
533 LAGG_WLOCK(sc);
534
535 lagg_stop(sc);
536 ifp->if_flags &= ~IFF_UP;
537
538 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
539 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
540
541 /* Shutdown and remove lagg ports */
542 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
543 lagg_port_destroy(lp, 1);
544 /* Unhook the aggregation protocol */
545 lagg_proto_detach(sc);
546 LAGG_UNLOCK_ASSERT(sc);
547
548 ifmedia_removeall(&sc->sc_media);
549 ether_ifdetach(ifp);
550 if_free(ifp);
551
552 LAGG_LIST_LOCK();
553 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
554 LAGG_LIST_UNLOCK();
555
556 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
557 LAGG_LOCK_DESTROY(sc);
558 free(sc, M_DEVBUF);
559}
560
561/*
562 * Set link-layer address on the lagg interface itself.
563 *
564 * Set noinline to be dtrace-friendly
565 */
566static __noinline void
567lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
568{
569 struct ifnet *ifp = sc->sc_ifp;
570 struct lagg_port lp;
571
572 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
573 return;
574
575 LAGG_WLOCK_ASSERT(sc);
576 /*
577 * Set the link layer address on the lagg interface.
578 * lagg_proto_lladdr() notifies the MAC change to
579 * the aggregation protocol. iflladdr_event handler which
580 * may trigger gratuitous ARPs for INET will be handled in
581 * a taskqueue.
582 */
583 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
584 lagg_proto_lladdr(sc);
585
586 /*
587 * Send notification request for lagg interface
588 * itself. Note that new lladdr is already set.
589 */
590 bzero(&lp, sizeof(lp));
591 lp.lp_ifp = sc->sc_ifp;
592 lp.lp_softc = sc;
593
594 /* Do not request lladdr change */
595 lagg_port_lladdr(&lp, lladdr, LAGG_LLQTYPE_VIRT);
596}
597
598static void
599lagg_capabilities(struct lagg_softc *sc)
600{
601 struct lagg_port *lp;
602 int cap = ~0, ena = ~0;
603 u_long hwa = ~0UL;
604 struct ifnet_hw_tsomax hw_tsomax;
605
606 LAGG_WLOCK_ASSERT(sc);
607
608 memset(&hw_tsomax, 0, sizeof(hw_tsomax));
609
610 /* Get capabilities from the lagg ports */
611 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
612 cap &= lp->lp_ifp->if_capabilities;
613 ena &= lp->lp_ifp->if_capenable;
614 hwa &= lp->lp_ifp->if_hwassist;
615 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
616 }
617 cap = (cap == ~0 ? 0 : cap);
618 ena = (ena == ~0 ? 0 : ena);
619 hwa = (hwa == ~0 ? 0 : hwa);
620
621 if (sc->sc_ifp->if_capabilities != cap ||
622 sc->sc_ifp->if_capenable != ena ||
623 sc->sc_ifp->if_hwassist != hwa ||
624 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
625 sc->sc_ifp->if_capabilities = cap;
626 sc->sc_ifp->if_capenable = ena;
627 sc->sc_ifp->if_hwassist = hwa;
628 getmicrotime(&sc->sc_ifp->if_lastchange);
629
630 if (sc->sc_ifflags & IFF_DEBUG)
631 if_printf(sc->sc_ifp,
632 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
633 }
634}
635
636/*
637 * Enqueue interface lladdr notification.
638 * If request is already queued, it is updated.
639 * If setting lladdr is also desired, @do_change has to be set to 1.
640 *
641 * Set noinline to be dtrace-friendly
642 */
643static __noinline void
644lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr, lagg_llqtype llq_type)
645{
646 struct lagg_softc *sc = lp->lp_softc;
647 struct ifnet *ifp = lp->lp_ifp;
648 struct lagg_llq *llq;
649
650 LAGG_WLOCK_ASSERT(sc);
651
652 /*
653 * Do not enqueue requests where lladdr is the same for
654 * "physical" interfaces (e.g. ports in lagg)
655 */
656 if (llq_type == LAGG_LLQTYPE_PHYS &&
657 memcmp(IF_LLADDR(ifp), lladdr, ETHER_ADDR_LEN) == 0)
658 return;
659
660 /* Check to make sure its not already queued to be changed */
661 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
662 if (llq->llq_ifp == ifp) {
663 /* Update lladdr, it may have changed */
664 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
665 return;
666 }
667 }
668
669 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT | M_ZERO);
670 if (llq == NULL) /* XXX what to do */
671 return;
672
673 llq->llq_ifp = ifp;
674 llq->llq_type = llq_type;
675 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
676 /* XXX: We should insert to tail */
677 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
678
679 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
680}
681
682/*
683 * Set the interface MAC address from a taskqueue to avoid a LOR.
684 *
685 * Set noinline to be dtrace-friendly
686 */
687static __noinline void
688lagg_port_setlladdr(void *arg, int pending)
689{
690 struct lagg_softc *sc = (struct lagg_softc *)arg;
691 struct lagg_llq *llq, *head;
692 struct ifnet *ifp;
693
694 /* Grab a local reference of the queue and remove it from the softc */
695 LAGG_WLOCK(sc);
696 head = SLIST_FIRST(&sc->sc_llq_head);
697 SLIST_FIRST(&sc->sc_llq_head) = NULL;
698 LAGG_WUNLOCK(sc);
699
700 /*
701 * Traverse the queue and set the lladdr on each ifp. It is safe to do
702 * unlocked as we have the only reference to it.
703 */
704 for (llq = head; llq != NULL; llq = head) {
705 ifp = llq->llq_ifp;
706
707 CURVNET_SET(ifp->if_vnet);
708
709 /*
710 * Set the link layer address on the laggport interface.
711 * Note that if_setlladdr() or iflladdr_event handler
712 * may result in arp transmission / lltable updates.
713 */
714 if (llq->llq_type == LAGG_LLQTYPE_PHYS)
715 if_setlladdr(ifp, llq->llq_lladdr,
716 ETHER_ADDR_LEN);
717 else
718 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
719 CURVNET_RESTORE();
720 head = SLIST_NEXT(llq, llq_entries);
721 free(llq, M_DEVBUF);
722 }
723}
724
725static int
726lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
727{
728 struct lagg_softc *sc_ptr;
729 struct lagg_port *lp, *tlp;
730 int error, i;
731 uint64_t *pval;
732
733 LAGG_WLOCK_ASSERT(sc);
734
735 /* Limit the maximal number of lagg ports */
736 if (sc->sc_count >= LAGG_MAX_PORTS)
737 return (ENOSPC);
738
739 /* Check if port has already been associated to a lagg */
740 if (ifp->if_lagg != NULL) {
741 /* Port is already in the current lagg? */
742 lp = (struct lagg_port *)ifp->if_lagg;
743 if (lp->lp_softc == sc)
744 return (EEXIST);
745 return (EBUSY);
746 }
747
748 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
749 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN)
750 return (EPROTONOSUPPORT);
751
752 /* Allow the first Ethernet member to define the MTU */
753 if (SLIST_EMPTY(&sc->sc_ports))
754 sc->sc_ifp->if_mtu = ifp->if_mtu;
755 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
756 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
757 ifp->if_xname);
758 return (EINVAL);
759 }
760
761 if ((lp = malloc(sizeof(struct lagg_port),
762 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
763 return (ENOMEM);
764
765 /* Check if port is a stacked lagg */
766 LAGG_LIST_LOCK();
767 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
768 if (ifp == sc_ptr->sc_ifp) {
769 LAGG_LIST_UNLOCK();
770 free(lp, M_DEVBUF);
771 return (EINVAL);
772 /* XXX disable stacking for the moment, its untested */
773#ifdef LAGG_PORT_STACKING
774 lp->lp_flags |= LAGG_PORT_STACK;
775 if (lagg_port_checkstacking(sc_ptr) >=
776 LAGG_MAX_STACKING) {
777 LAGG_LIST_UNLOCK();
778 free(lp, M_DEVBUF);
779 return (E2BIG);
780 }
781#endif
782 }
783 }
784 LAGG_LIST_UNLOCK();
785
786 /* Change the interface type */
787 lp->lp_iftype = ifp->if_type;
788 ifp->if_type = IFT_IEEE8023ADLAG;
789 ifp->if_lagg = lp;
790 lp->lp_ioctl = ifp->if_ioctl;
791 ifp->if_ioctl = lagg_port_ioctl;
792 lp->lp_output = ifp->if_output;
793 ifp->if_output = lagg_port_output;
794
795 lp->lp_ifp = ifp;
796 lp->lp_softc = sc;
797
798 /* Save port link layer address */
799 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
800
801 if (SLIST_EMPTY(&sc->sc_ports)) {
802 sc->sc_primary = lp;
803 /* First port in lagg. Update/notify lagg lladdress */
804 lagg_lladdr(sc, IF_LLADDR(ifp));
805 } else {
806
807 /*
808 * Update link layer address for this port and
809 * send notifications to other subsystems.
810 */
811 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp), LAGG_LLQTYPE_PHYS);
812 }
813
814 /*
815 * Insert into the list of ports.
816 * Keep ports sorted by if_index. It is handy, when configuration
817 * is predictable and `ifconfig laggN create ...` command
818 * will lead to the same result each time.
819 */
820 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
821 if (tlp->lp_ifp->if_index < ifp->if_index && (
822 SLIST_NEXT(tlp, lp_entries) == NULL ||
823 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index >
824 ifp->if_index))
825 break;
826 }
827 if (tlp != NULL)
828 SLIST_INSERT_AFTER(tlp, lp, lp_entries);
829 else
830 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
831 sc->sc_count++;
832
833 /* Update lagg capabilities */
834 lagg_capabilities(sc);
835 lagg_linkstate(sc);
836
837 /* Read port counters */
838 pval = lp->port_counters.val;
839 for (i = 0; i < IFCOUNTERS; i++, pval++)
840 *pval = ifp->if_get_counter(ifp, i);
841 /* Add multicast addresses and interface flags to this port */
842 lagg_ether_cmdmulti(lp, 1);
843 lagg_setflags(lp, 1);
844
845 if ((error = lagg_proto_addport(sc, lp)) != 0) {
846 /* Remove the port, without calling pr_delport. */
847 lagg_port_destroy(lp, 0);
848 return (error);
849 }
850
851 return (0);
852}
853
854#ifdef LAGG_PORT_STACKING
855static int
856lagg_port_checkstacking(struct lagg_softc *sc)
857{
858 struct lagg_softc *sc_ptr;
859 struct lagg_port *lp;
860 int m = 0;
861
862 LAGG_WLOCK_ASSERT(sc);
863
864 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
865 if (lp->lp_flags & LAGG_PORT_STACK) {
866 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
867 m = MAX(m, lagg_port_checkstacking(sc_ptr));
868 }
869 }
870
871 return (m + 1);
872}
873#endif
874
875static int
876lagg_port_destroy(struct lagg_port *lp, int rundelport)
877{
878 struct lagg_softc *sc = lp->lp_softc;
879 struct lagg_port *lp_ptr, *lp0;
880 struct lagg_llq *llq;
881 struct ifnet *ifp = lp->lp_ifp;
882 uint64_t *pval, vdiff;
883 int i;
884
885 LAGG_WLOCK_ASSERT(sc);
886
887 if (rundelport)
888 lagg_proto_delport(sc, lp);
889
890 /*
891 * Remove multicast addresses and interface flags from this port and
892 * reset the MAC address, skip if the interface is being detached.
893 */
894 if (!lp->lp_detaching) {
895 lagg_ether_cmdmulti(lp, 0);
896 lagg_setflags(lp, 0);
897 lagg_port_lladdr(lp, lp->lp_lladdr, LAGG_LLQTYPE_PHYS);
898 }
899
900 /* Restore interface */
901 ifp->if_type = lp->lp_iftype;
902 ifp->if_ioctl = lp->lp_ioctl;
903 ifp->if_output = lp->lp_output;
904 ifp->if_lagg = NULL;
905
906 /* Update detached port counters */
907 pval = lp->port_counters.val;
908 for (i = 0; i < IFCOUNTERS; i++, pval++) {
909 vdiff = ifp->if_get_counter(ifp, i) - *pval;
910 sc->detached_counters.val[i] += vdiff;
911 }
912
913 /* Finally, remove the port from the lagg */
914 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
915 sc->sc_count--;
916
917 /* Update the primary interface */
918 if (lp == sc->sc_primary) {
919 uint8_t lladdr[ETHER_ADDR_LEN];
920
921 if ((lp0 = SLIST_FIRST(&sc->sc_ports)) == NULL) {
922 bzero(&lladdr, ETHER_ADDR_LEN);
923 } else {
924 bcopy(lp0->lp_lladdr,
925 lladdr, ETHER_ADDR_LEN);
926 }
927 lagg_lladdr(sc, lladdr);
928
929 /* Mark lp0 as new primary */
930 sc->sc_primary = lp0;
931
932 /*
933 * Enqueue lladdr update/notification for each port
934 * (new primary needs update as well, to switch from
935 * old lladdr to its 'real' one).
936 */
937 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
938 lagg_port_lladdr(lp_ptr, lladdr, LAGG_LLQTYPE_PHYS);
939 }
940
941 /* Remove any pending lladdr changes from the queue */
942 if (lp->lp_detaching) {
943 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
944 if (llq->llq_ifp == ifp) {
945 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
946 llq_entries);
947 free(llq, M_DEVBUF);
948 break; /* Only appears once */
949 }
950 }
951 }
952
953 if (lp->lp_ifflags)
954 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
955
956 free(lp, M_DEVBUF);
957
958 /* Update lagg capabilities */
959 lagg_capabilities(sc);
960 lagg_linkstate(sc);
961
962 return (0);
963}
964
965static int
966lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
967{
968 struct lagg_reqport *rp = (struct lagg_reqport *)data;
969 struct lagg_softc *sc;
970 struct lagg_port *lp = NULL;
971 int error = 0;
972 struct rm_priotracker tracker;
973
974 /* Should be checked by the caller */
975 if (ifp->if_type != IFT_IEEE8023ADLAG ||
976 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
977 goto fallback;
978
979 switch (cmd) {
980 case SIOCGLAGGPORT:
981 if (rp->rp_portname[0] == '\0' ||
982 ifunit(rp->rp_portname) != ifp) {
983 error = EINVAL;
984 break;
985 }
986
987 LAGG_RLOCK(sc, &tracker);
988 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
989 error = ENOENT;
990 LAGG_RUNLOCK(sc, &tracker);
991 break;
992 }
993
994 lagg_port2req(lp, rp);
995 LAGG_RUNLOCK(sc, &tracker);
996 break;
997
998 case SIOCSIFCAP:
999 if (lp->lp_ioctl == NULL) {
1000 error = EINVAL;
1001 break;
1002 }
1003 error = (*lp->lp_ioctl)(ifp, cmd, data);
1004 if (error)
1005 break;
1006
1007 /* Update lagg interface capabilities */
1008 LAGG_WLOCK(sc);
1009 lagg_capabilities(sc);
1010 LAGG_WUNLOCK(sc);
1011 break;
1012
1013 case SIOCSIFMTU:
1014 /* Do not allow the MTU to be changed once joined */
1015 error = EINVAL;
1016 break;
1017
1018 default:
1019 goto fallback;
1020 }
1021
1022 return (error);
1023
1024fallback:
1025 if (lp->lp_ioctl != NULL)
1026 return ((*lp->lp_ioctl)(ifp, cmd, data));
1027
1028 return (EINVAL);
1029}
1030
1031/*
1032 * Requests counter @cnt data.
1033 *
1034 * Counter value is calculated the following way:
1035 * 1) for each port, sum difference between current and "initial" measurements.
1036 * 2) add lagg logical interface counters.
1037 * 3) add data from detached_counters array.
1038 *
1039 * We also do the following things on ports attach/detach:
1040 * 1) On port attach we store all counters it has into port_counter array.
1041 * 2) On port detach we add the different between "initial" and
1042 * current counters data to detached_counters array.
1043 */
1044static uint64_t
1045lagg_get_counter(struct ifnet *ifp, ift_counter cnt)
1046{
1047 struct lagg_softc *sc;
1048 struct lagg_port *lp;
1049 struct ifnet *lpifp;
1050 struct rm_priotracker tracker;
1051 uint64_t newval, oldval, vsum;
1052
1053 /* Revise this when we've got non-generic counters. */
1054 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1055
1056 sc = (struct lagg_softc *)ifp->if_softc;
1057 LAGG_RLOCK(sc, &tracker);
1058
1059 vsum = 0;
1060 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1061 /* Saved attached value */
1062 oldval = lp->port_counters.val[cnt];
1063 /* current value */
1064 lpifp = lp->lp_ifp;
1065 newval = lpifp->if_get_counter(lpifp, cnt);
1066 /* Calculate diff and save new */
1067 vsum += newval - oldval;
1068 }
1069
1070 /*
1071 * Add counter data which might be added by upper
1072 * layer protocols operating on logical interface.
1073 */
1074 vsum += if_get_counter_default(ifp, cnt);
1075
1076 /*
1077 * Add counter data from detached ports counters
1078 */
1079 vsum += sc->detached_counters.val[cnt];
1080
1081 LAGG_RUNLOCK(sc, &tracker);
1082
1083 return (vsum);
1084}
1085
1086/*
1087 * For direct output to child ports.
1088 */
1089static int
1090lagg_port_output(struct ifnet *ifp, struct mbuf *m,
1091 const struct sockaddr *dst, struct route *ro)
1092{
1093 struct lagg_port *lp = ifp->if_lagg;
1094
1095 switch (dst->sa_family) {
1096 case pseudo_AF_HDRCMPLT:
1097 case AF_UNSPEC:
1098 return ((*lp->lp_output)(ifp, m, dst, ro));
1099 }
1100
1101 /* drop any other frames */
1102 m_freem(m);
1103 return (ENETDOWN);
1104}
1105
1106static void
1107lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
1108{
1109 struct lagg_port *lp;
1110 struct lagg_softc *sc;
1111
1112 if ((lp = ifp->if_lagg) == NULL)
1113 return;
1114 /* If the ifnet is just being renamed, don't do anything. */
1115 if (ifp->if_flags & IFF_RENAMING)
1116 return;
1117
1118 sc = lp->lp_softc;
1119
1120 LAGG_WLOCK(sc);
1121 lp->lp_detaching = 1;
1122 lagg_port_destroy(lp, 1);
1123 LAGG_WUNLOCK(sc);
1124}
1125
1126static void
1127lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
1128{
1129 struct lagg_softc *sc = lp->lp_softc;
1130
1131 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
1132 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
1133 rp->rp_prio = lp->lp_prio;
1134 rp->rp_flags = lp->lp_flags;
1135 lagg_proto_portreq(sc, lp, &rp->rp_psc);
1136
1137 /* Add protocol specific flags */
1138 switch (sc->sc_proto) {
1139 case LAGG_PROTO_FAILOVER:
1140 if (lp == sc->sc_primary)
1141 rp->rp_flags |= LAGG_PORT_MASTER;
1142 if (lp == lagg_link_active(sc, sc->sc_primary))
1143 rp->rp_flags |= LAGG_PORT_ACTIVE;
1144 break;
1145
1146 case LAGG_PROTO_ROUNDROBIN:
1147 case LAGG_PROTO_LOADBALANCE:
1148 case LAGG_PROTO_BROADCAST:
1149 if (LAGG_PORTACTIVE(lp))
1150 rp->rp_flags |= LAGG_PORT_ACTIVE;
1151 break;
1152
1153 case LAGG_PROTO_LACP:
1154 /* LACP has a different definition of active */
1155 if (lacp_isactive(lp))
1156 rp->rp_flags |= LAGG_PORT_ACTIVE;
1157 if (lacp_iscollecting(lp))
1158 rp->rp_flags |= LAGG_PORT_COLLECTING;
1159 if (lacp_isdistributing(lp))
1160 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
1161 break;
1162 }
1163
1164}
1165
1166static void
1167lagg_init(void *xsc)
1168{
1169 struct lagg_softc *sc = (struct lagg_softc *)xsc;
1170 struct ifnet *ifp = sc->sc_ifp;
1171 struct lagg_port *lp;
1172
1173 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1174 return;
1175
1176 LAGG_WLOCK(sc);
1177
1178 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1179
1180 /*
1181 * Update the port lladdrs if needed.
1182 * This might be if_setlladdr() notification
1183 * that lladdr has been changed.
1184 */
1185 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1186 lagg_port_lladdr(lp, IF_LLADDR(ifp), LAGG_LLQTYPE_PHYS);
1187
1188 lagg_proto_init(sc);
1189
1190 LAGG_WUNLOCK(sc);
1191}
1192
1193static void
1194lagg_stop(struct lagg_softc *sc)
1195{
1196 struct ifnet *ifp = sc->sc_ifp;
1197
1198 LAGG_WLOCK_ASSERT(sc);
1199
1200 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1201 return;
1202
1203 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1204
1205 lagg_proto_stop(sc);
1206}
1207
1208static int
1209lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1210{
1211 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1212 struct lagg_reqall *ra = (struct lagg_reqall *)data;
1213 struct lagg_reqopts *ro = (struct lagg_reqopts *)data;
1214 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
1215 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
1216 struct ifreq *ifr = (struct ifreq *)data;
1217 struct lagg_port *lp;
1218 struct ifnet *tpif;
1219 struct thread *td = curthread;
1220 char *buf, *outbuf;
1221 int count, buflen, len, error = 0;
1222 struct rm_priotracker tracker;
1223
1224 bzero(&rpbuf, sizeof(rpbuf));
1225
1226 switch (cmd) {
1227 case SIOCGLAGG:
1228 LAGG_RLOCK(sc, &tracker);
1229 count = 0;
1230 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1231 count++;
1232 buflen = count * sizeof(struct lagg_reqport);
1233 LAGG_RUNLOCK(sc, &tracker);
1234
1235 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1236
1237 LAGG_RLOCK(sc, &tracker);
1238 ra->ra_proto = sc->sc_proto;
1239 lagg_proto_request(sc, &ra->ra_psc);
1240 count = 0;
1241 buf = outbuf;
1242 len = min(ra->ra_size, buflen);
1243 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1244 if (len < sizeof(rpbuf))
1245 break;
1246
1247 lagg_port2req(lp, &rpbuf);
1248 memcpy(buf, &rpbuf, sizeof(rpbuf));
1249 count++;
1250 buf += sizeof(rpbuf);
1251 len -= sizeof(rpbuf);
1252 }
1253 LAGG_RUNLOCK(sc, &tracker);
1254 ra->ra_ports = count;
1255 ra->ra_size = count * sizeof(rpbuf);
1256 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1257 free(outbuf, M_TEMP);
1258 break;
1259 case SIOCSLAGG:
1260 error = priv_check(td, PRIV_NET_LAGG);
1261 if (error)
1262 break;
| 23
24#include "opt_inet.h"
25#include "opt_inet6.h"
26
27#include <sys/param.h>
28#include <sys/kernel.h>
29#include <sys/malloc.h>
30#include <sys/mbuf.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>
36#include <sys/priv.h>
37#include <sys/systm.h>
38#include <sys/proc.h>
39#include <sys/lock.h>
40#include <sys/rmlock.h>
41#include <sys/taskqueue.h>
42#include <sys/eventhandler.h>
43
44#include <net/ethernet.h>
45#include <net/if.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>
52#include <net/bpf.h>
53#include <net/vnet.h>
54
55#if defined(INET) || defined(INET6)
56#include <netinet/in.h>
57#include <netinet/ip.h>
58#endif
59#ifdef INET
60#include <netinet/in_systm.h>
61#include <netinet/if_ether.h>
62#endif
63
64#ifdef INET6
65#include <netinet/ip6.h>
66#include <netinet6/in6_var.h>
67#include <netinet6/in6_ifattach.h>
68#endif
69
70#include <net/if_vlan_var.h>
71#include <net/if_lagg.h>
72#include <net/ieee8023ad_lacp.h>
73
74/* Special flags we should propagate to the lagg ports. */
75static struct {
76 int flag;
77 int (*func)(struct ifnet *, int);
78} lagg_pflags[] = {
79 {IFF_PROMISC, ifpromisc},
80 {IFF_ALLMULTI, if_allmulti},
81 {0, NULL}
82};
83
84VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
85#define V_lagg_list VNET(lagg_list)
86static 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)
93eventhandler_tag lagg_detach_cookie = NULL;
94
95static int lagg_clone_create(struct if_clone *, int, caddr_t);
96static void lagg_clone_destroy(struct ifnet *);
97static VNET_DEFINE(struct if_clone *, lagg_cloner);
98#define V_lagg_cloner VNET(lagg_cloner)
99static const char laggname[] = "lagg";
100
101static void lagg_lladdr(struct lagg_softc *, uint8_t *);
102static void lagg_capabilities(struct lagg_softc *);
103static void lagg_port_lladdr(struct lagg_port *, uint8_t *, lagg_llqtype);
104static void lagg_port_setlladdr(void *, int);
105static int lagg_port_create(struct lagg_softc *, struct ifnet *);
106static int lagg_port_destroy(struct lagg_port *, int);
107static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
108static void lagg_linkstate(struct lagg_softc *);
109static void lagg_port_state(struct ifnet *, int);
110static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
111static int lagg_port_output(struct ifnet *, struct mbuf *,
112 const struct sockaddr *, struct route *);
113static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
114#ifdef LAGG_PORT_STACKING
115static int lagg_port_checkstacking(struct lagg_softc *);
116#endif
117static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
118static void lagg_init(void *);
119static void lagg_stop(struct lagg_softc *);
120static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
121static int lagg_ether_setmulti(struct lagg_softc *);
122static int lagg_ether_cmdmulti(struct lagg_port *, int);
123static int lagg_setflag(struct lagg_port *, int, int,
124 int (*func)(struct ifnet *, int));
125static int lagg_setflags(struct lagg_port *, int status);
126static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt);
127static int lagg_transmit(struct ifnet *, struct mbuf *);
128static void lagg_qflush(struct ifnet *);
129static int lagg_media_change(struct ifnet *);
130static void lagg_media_status(struct ifnet *, struct ifmediareq *);
131static struct lagg_port *lagg_link_active(struct lagg_softc *,
132 struct lagg_port *);
133
134/* Simple round robin */
135static void lagg_rr_attach(struct lagg_softc *);
136static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
137static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
138 struct mbuf *);
139
140/* Active failover */
141static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
142static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
143 struct mbuf *);
144
145/* Loadbalancing */
146static void lagg_lb_attach(struct lagg_softc *);
147static void lagg_lb_detach(struct lagg_softc *);
148static int lagg_lb_port_create(struct lagg_port *);
149static void lagg_lb_port_destroy(struct lagg_port *);
150static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
151static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
152 struct mbuf *);
153static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
154
155/* Broadcast */
156static int lagg_bcast_start(struct lagg_softc *, struct mbuf *);
157static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *,
158 struct mbuf *);
159
160/* 802.3ad LACP */
161static void lagg_lacp_attach(struct lagg_softc *);
162static void lagg_lacp_detach(struct lagg_softc *);
163static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
164static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
165 struct mbuf *);
166static void lagg_lacp_lladdr(struct lagg_softc *);
167
168/* lagg protocol table */
169static const struct lagg_proto {
170 lagg_proto pr_num;
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 *,
175 struct mbuf *);
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 *);
184} lagg_protos[] = {
185 {
186 .pr_num = LAGG_PROTO_NONE
187 },
188 {
189 .pr_num = LAGG_PROTO_ROUNDROBIN,
190 .pr_attach = lagg_rr_attach,
191 .pr_start = lagg_rr_start,
192 .pr_input = lagg_rr_input,
193 },
194 {
195 .pr_num = LAGG_PROTO_FAILOVER,
196 .pr_start = lagg_fail_start,
197 .pr_input = lagg_fail_input,
198 },
199 {
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,
207 },
208 {
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,
222 },
223 {
224 .pr_num = LAGG_PROTO_BROADCAST,
225 .pr_start = lagg_bcast_start,
226 .pr_input = lagg_bcast_input,
227 },
228};
229
230SYSCTL_DECL(_net_link);
231SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
232 "Link Aggregation");
233
234/* Allow input on any failover links */
235static VNET_DEFINE(int, lagg_failover_rx_all);
236#define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
237SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
238 &VNET_NAME(lagg_failover_rx_all), 0,
239 "Accept input from any interface in a failover lagg");
240
241/* Default value for using flowid */
242static VNET_DEFINE(int, def_use_flowid) = 1;
243#define V_def_use_flowid VNET(def_use_flowid)
244SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN,
245 &VNET_NAME(def_use_flowid), 0,
246 "Default setting for using flow id for load sharing");
247
248/* Default value for flowid shift */
249static VNET_DEFINE(int, def_flowid_shift) = 16;
250#define V_def_flowid_shift VNET(def_flowid_shift)
251SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN,
252 &VNET_NAME(def_flowid_shift), 0,
253 "Default setting for flowid shift for load sharing");
254
255static void
256vnet_lagg_init(const void *unused __unused)
257{
258
259 LAGG_LIST_LOCK_INIT();
260 SLIST_INIT(&V_lagg_list);
261 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
262 lagg_clone_destroy, 0);
263}
264VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
265 vnet_lagg_init, NULL);
266
267static void
268vnet_lagg_uninit(const void *unused __unused)
269{
270
271 if_clone_detach(V_lagg_cloner);
272 LAGG_LIST_LOCK_DESTROY();
273}
274VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
275 vnet_lagg_uninit, NULL);
276
277static int
278lagg_modevent(module_t mod, int type, void *data)
279{
280
281 switch (type) {
282 case MOD_LOAD:
283 lagg_input_p = lagg_input;
284 lagg_linkstate_p = lagg_port_state;
285 lagg_detach_cookie = EVENTHANDLER_REGISTER(
286 ifnet_departure_event, lagg_port_ifdetach, NULL,
287 EVENTHANDLER_PRI_ANY);
288 break;
289 case MOD_UNLOAD:
290 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
291 lagg_detach_cookie);
292 lagg_input_p = NULL;
293 lagg_linkstate_p = NULL;
294 break;
295 default:
296 return (EOPNOTSUPP);
297 }
298 return (0);
299}
300
301static moduledata_t lagg_mod = {
302 "if_lagg",
303 lagg_modevent,
304 0
305};
306
307DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
308MODULE_VERSION(if_lagg, 1);
309
310static void
311lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr)
312{
313
314 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto",
315 __func__, sc));
316
317 if (sc->sc_ifflags & IFF_DEBUG)
318 if_printf(sc->sc_ifp, "using proto %u\n", pr);
319
320 if (lagg_protos[pr].pr_attach != NULL)
321 lagg_protos[pr].pr_attach(sc);
322 sc->sc_proto = pr;
323}
324
325static void
326lagg_proto_detach(struct lagg_softc *sc)
327{
328 lagg_proto pr;
329
330 LAGG_WLOCK_ASSERT(sc);
331
332 pr = sc->sc_proto;
333 sc->sc_proto = LAGG_PROTO_NONE;
334
335 if (lagg_protos[pr].pr_detach != NULL)
336 lagg_protos[pr].pr_detach(sc);
337 else
338 LAGG_WUNLOCK(sc);
339}
340
341static int
342lagg_proto_start(struct lagg_softc *sc, struct mbuf *m)
343{
344
345 return (lagg_protos[sc->sc_proto].pr_start(sc, m));
346}
347
348static struct mbuf *
349lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
350{
351
352 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m));
353}
354
355static int
356lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp)
357{
358
359 if (lagg_protos[sc->sc_proto].pr_addport == NULL)
360 return (0);
361 else
362 return (lagg_protos[sc->sc_proto].pr_addport(lp));
363}
364
365static void
366lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp)
367{
368
369 if (lagg_protos[sc->sc_proto].pr_delport != NULL)
370 lagg_protos[sc->sc_proto].pr_delport(lp);
371}
372
373static void
374lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp)
375{
376
377 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL)
378 lagg_protos[sc->sc_proto].pr_linkstate(lp);
379}
380
381static void
382lagg_proto_init(struct lagg_softc *sc)
383{
384
385 if (lagg_protos[sc->sc_proto].pr_init != NULL)
386 lagg_protos[sc->sc_proto].pr_init(sc);
387}
388
389static void
390lagg_proto_stop(struct lagg_softc *sc)
391{
392
393 if (lagg_protos[sc->sc_proto].pr_stop != NULL)
394 lagg_protos[sc->sc_proto].pr_stop(sc);
395}
396
397static void
398lagg_proto_lladdr(struct lagg_softc *sc)
399{
400
401 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL)
402 lagg_protos[sc->sc_proto].pr_lladdr(sc);
403}
404
405static void
406lagg_proto_request(struct lagg_softc *sc, void *v)
407{
408
409 if (lagg_protos[sc->sc_proto].pr_request != NULL)
410 lagg_protos[sc->sc_proto].pr_request(sc, v);
411}
412
413static void
414lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v)
415{
416
417 if (lagg_protos[sc->sc_proto].pr_portreq != NULL)
418 lagg_protos[sc->sc_proto].pr_portreq(lp, v);
419}
420
421/*
422 * This routine is run via an vlan
423 * config EVENT
424 */
425static void
426lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
427{
428 struct lagg_softc *sc = ifp->if_softc;
429 struct lagg_port *lp;
430 struct rm_priotracker tracker;
431
432 if (ifp->if_softc != arg) /* Not our event */
433 return;
434
435 LAGG_RLOCK(sc, &tracker);
436 if (!SLIST_EMPTY(&sc->sc_ports)) {
437 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
438 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
439 }
440 LAGG_RUNLOCK(sc, &tracker);
441}
442
443/*
444 * This routine is run via an vlan
445 * unconfig EVENT
446 */
447static void
448lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
449{
450 struct lagg_softc *sc = ifp->if_softc;
451 struct lagg_port *lp;
452 struct rm_priotracker tracker;
453
454 if (ifp->if_softc != arg) /* Not our event */
455 return;
456
457 LAGG_RLOCK(sc, &tracker);
458 if (!SLIST_EMPTY(&sc->sc_ports)) {
459 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
460 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
461 }
462 LAGG_RUNLOCK(sc, &tracker);
463}
464
465static int
466lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
467{
468 struct lagg_softc *sc;
469 struct ifnet *ifp;
470 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
471
472 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
473 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
474 if (ifp == NULL) {
475 free(sc, M_DEVBUF);
476 return (ENOSPC);
477 }
478
479 if (V_def_use_flowid)
480 sc->sc_opts |= LAGG_OPT_USE_FLOWID;
481 sc->flowid_shift = V_def_flowid_shift;
482
483 /* Hash all layers by default */
484 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4;
485
486 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT);
487
488 LAGG_LOCK_INIT(sc);
489 SLIST_INIT(&sc->sc_ports);
490 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
491
492 /* Initialise pseudo media types */
493 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
494 lagg_media_status);
495 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
496 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
497
498 if_initname(ifp, laggname, unit);
499 ifp->if_softc = sc;
500 ifp->if_transmit = lagg_transmit;
501 ifp->if_qflush = lagg_qflush;
502 ifp->if_init = lagg_init;
503 ifp->if_ioctl = lagg_ioctl;
504 ifp->if_get_counter = lagg_get_counter;
505 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
506 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
507
508 /*
509 * Attach as an ordinary ethernet device, children will be attached
510 * as special device IFT_IEEE8023ADLAG.
511 */
512 ether_ifattach(ifp, eaddr);
513
514 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
515 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
516 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
517 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
518
519 /* Insert into the global list of laggs */
520 LAGG_LIST_LOCK();
521 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
522 LAGG_LIST_UNLOCK();
523
524 return (0);
525}
526
527static void
528lagg_clone_destroy(struct ifnet *ifp)
529{
530 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
531 struct lagg_port *lp;
532
533 LAGG_WLOCK(sc);
534
535 lagg_stop(sc);
536 ifp->if_flags &= ~IFF_UP;
537
538 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
539 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
540
541 /* Shutdown and remove lagg ports */
542 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
543 lagg_port_destroy(lp, 1);
544 /* Unhook the aggregation protocol */
545 lagg_proto_detach(sc);
546 LAGG_UNLOCK_ASSERT(sc);
547
548 ifmedia_removeall(&sc->sc_media);
549 ether_ifdetach(ifp);
550 if_free(ifp);
551
552 LAGG_LIST_LOCK();
553 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
554 LAGG_LIST_UNLOCK();
555
556 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
557 LAGG_LOCK_DESTROY(sc);
558 free(sc, M_DEVBUF);
559}
560
561/*
562 * Set link-layer address on the lagg interface itself.
563 *
564 * Set noinline to be dtrace-friendly
565 */
566static __noinline void
567lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
568{
569 struct ifnet *ifp = sc->sc_ifp;
570 struct lagg_port lp;
571
572 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
573 return;
574
575 LAGG_WLOCK_ASSERT(sc);
576 /*
577 * Set the link layer address on the lagg interface.
578 * lagg_proto_lladdr() notifies the MAC change to
579 * the aggregation protocol. iflladdr_event handler which
580 * may trigger gratuitous ARPs for INET will be handled in
581 * a taskqueue.
582 */
583 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
584 lagg_proto_lladdr(sc);
585
586 /*
587 * Send notification request for lagg interface
588 * itself. Note that new lladdr is already set.
589 */
590 bzero(&lp, sizeof(lp));
591 lp.lp_ifp = sc->sc_ifp;
592 lp.lp_softc = sc;
593
594 /* Do not request lladdr change */
595 lagg_port_lladdr(&lp, lladdr, LAGG_LLQTYPE_VIRT);
596}
597
598static void
599lagg_capabilities(struct lagg_softc *sc)
600{
601 struct lagg_port *lp;
602 int cap = ~0, ena = ~0;
603 u_long hwa = ~0UL;
604 struct ifnet_hw_tsomax hw_tsomax;
605
606 LAGG_WLOCK_ASSERT(sc);
607
608 memset(&hw_tsomax, 0, sizeof(hw_tsomax));
609
610 /* Get capabilities from the lagg ports */
611 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
612 cap &= lp->lp_ifp->if_capabilities;
613 ena &= lp->lp_ifp->if_capenable;
614 hwa &= lp->lp_ifp->if_hwassist;
615 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
616 }
617 cap = (cap == ~0 ? 0 : cap);
618 ena = (ena == ~0 ? 0 : ena);
619 hwa = (hwa == ~0 ? 0 : hwa);
620
621 if (sc->sc_ifp->if_capabilities != cap ||
622 sc->sc_ifp->if_capenable != ena ||
623 sc->sc_ifp->if_hwassist != hwa ||
624 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
625 sc->sc_ifp->if_capabilities = cap;
626 sc->sc_ifp->if_capenable = ena;
627 sc->sc_ifp->if_hwassist = hwa;
628 getmicrotime(&sc->sc_ifp->if_lastchange);
629
630 if (sc->sc_ifflags & IFF_DEBUG)
631 if_printf(sc->sc_ifp,
632 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
633 }
634}
635
636/*
637 * Enqueue interface lladdr notification.
638 * If request is already queued, it is updated.
639 * If setting lladdr is also desired, @do_change has to be set to 1.
640 *
641 * Set noinline to be dtrace-friendly
642 */
643static __noinline void
644lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr, lagg_llqtype llq_type)
645{
646 struct lagg_softc *sc = lp->lp_softc;
647 struct ifnet *ifp = lp->lp_ifp;
648 struct lagg_llq *llq;
649
650 LAGG_WLOCK_ASSERT(sc);
651
652 /*
653 * Do not enqueue requests where lladdr is the same for
654 * "physical" interfaces (e.g. ports in lagg)
655 */
656 if (llq_type == LAGG_LLQTYPE_PHYS &&
657 memcmp(IF_LLADDR(ifp), lladdr, ETHER_ADDR_LEN) == 0)
658 return;
659
660 /* Check to make sure its not already queued to be changed */
661 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
662 if (llq->llq_ifp == ifp) {
663 /* Update lladdr, it may have changed */
664 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
665 return;
666 }
667 }
668
669 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT | M_ZERO);
670 if (llq == NULL) /* XXX what to do */
671 return;
672
673 llq->llq_ifp = ifp;
674 llq->llq_type = llq_type;
675 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
676 /* XXX: We should insert to tail */
677 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
678
679 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
680}
681
682/*
683 * Set the interface MAC address from a taskqueue to avoid a LOR.
684 *
685 * Set noinline to be dtrace-friendly
686 */
687static __noinline void
688lagg_port_setlladdr(void *arg, int pending)
689{
690 struct lagg_softc *sc = (struct lagg_softc *)arg;
691 struct lagg_llq *llq, *head;
692 struct ifnet *ifp;
693
694 /* Grab a local reference of the queue and remove it from the softc */
695 LAGG_WLOCK(sc);
696 head = SLIST_FIRST(&sc->sc_llq_head);
697 SLIST_FIRST(&sc->sc_llq_head) = NULL;
698 LAGG_WUNLOCK(sc);
699
700 /*
701 * Traverse the queue and set the lladdr on each ifp. It is safe to do
702 * unlocked as we have the only reference to it.
703 */
704 for (llq = head; llq != NULL; llq = head) {
705 ifp = llq->llq_ifp;
706
707 CURVNET_SET(ifp->if_vnet);
708
709 /*
710 * Set the link layer address on the laggport interface.
711 * Note that if_setlladdr() or iflladdr_event handler
712 * may result in arp transmission / lltable updates.
713 */
714 if (llq->llq_type == LAGG_LLQTYPE_PHYS)
715 if_setlladdr(ifp, llq->llq_lladdr,
716 ETHER_ADDR_LEN);
717 else
718 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
719 CURVNET_RESTORE();
720 head = SLIST_NEXT(llq, llq_entries);
721 free(llq, M_DEVBUF);
722 }
723}
724
725static int
726lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
727{
728 struct lagg_softc *sc_ptr;
729 struct lagg_port *lp, *tlp;
730 int error, i;
731 uint64_t *pval;
732
733 LAGG_WLOCK_ASSERT(sc);
734
735 /* Limit the maximal number of lagg ports */
736 if (sc->sc_count >= LAGG_MAX_PORTS)
737 return (ENOSPC);
738
739 /* Check if port has already been associated to a lagg */
740 if (ifp->if_lagg != NULL) {
741 /* Port is already in the current lagg? */
742 lp = (struct lagg_port *)ifp->if_lagg;
743 if (lp->lp_softc == sc)
744 return (EEXIST);
745 return (EBUSY);
746 }
747
748 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
749 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN)
750 return (EPROTONOSUPPORT);
751
752 /* Allow the first Ethernet member to define the MTU */
753 if (SLIST_EMPTY(&sc->sc_ports))
754 sc->sc_ifp->if_mtu = ifp->if_mtu;
755 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
756 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
757 ifp->if_xname);
758 return (EINVAL);
759 }
760
761 if ((lp = malloc(sizeof(struct lagg_port),
762 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
763 return (ENOMEM);
764
765 /* Check if port is a stacked lagg */
766 LAGG_LIST_LOCK();
767 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
768 if (ifp == sc_ptr->sc_ifp) {
769 LAGG_LIST_UNLOCK();
770 free(lp, M_DEVBUF);
771 return (EINVAL);
772 /* XXX disable stacking for the moment, its untested */
773#ifdef LAGG_PORT_STACKING
774 lp->lp_flags |= LAGG_PORT_STACK;
775 if (lagg_port_checkstacking(sc_ptr) >=
776 LAGG_MAX_STACKING) {
777 LAGG_LIST_UNLOCK();
778 free(lp, M_DEVBUF);
779 return (E2BIG);
780 }
781#endif
782 }
783 }
784 LAGG_LIST_UNLOCK();
785
786 /* Change the interface type */
787 lp->lp_iftype = ifp->if_type;
788 ifp->if_type = IFT_IEEE8023ADLAG;
789 ifp->if_lagg = lp;
790 lp->lp_ioctl = ifp->if_ioctl;
791 ifp->if_ioctl = lagg_port_ioctl;
792 lp->lp_output = ifp->if_output;
793 ifp->if_output = lagg_port_output;
794
795 lp->lp_ifp = ifp;
796 lp->lp_softc = sc;
797
798 /* Save port link layer address */
799 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
800
801 if (SLIST_EMPTY(&sc->sc_ports)) {
802 sc->sc_primary = lp;
803 /* First port in lagg. Update/notify lagg lladdress */
804 lagg_lladdr(sc, IF_LLADDR(ifp));
805 } else {
806
807 /*
808 * Update link layer address for this port and
809 * send notifications to other subsystems.
810 */
811 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp), LAGG_LLQTYPE_PHYS);
812 }
813
814 /*
815 * Insert into the list of ports.
816 * Keep ports sorted by if_index. It is handy, when configuration
817 * is predictable and `ifconfig laggN create ...` command
818 * will lead to the same result each time.
819 */
820 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
821 if (tlp->lp_ifp->if_index < ifp->if_index && (
822 SLIST_NEXT(tlp, lp_entries) == NULL ||
823 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index >
824 ifp->if_index))
825 break;
826 }
827 if (tlp != NULL)
828 SLIST_INSERT_AFTER(tlp, lp, lp_entries);
829 else
830 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
831 sc->sc_count++;
832
833 /* Update lagg capabilities */
834 lagg_capabilities(sc);
835 lagg_linkstate(sc);
836
837 /* Read port counters */
838 pval = lp->port_counters.val;
839 for (i = 0; i < IFCOUNTERS; i++, pval++)
840 *pval = ifp->if_get_counter(ifp, i);
841 /* Add multicast addresses and interface flags to this port */
842 lagg_ether_cmdmulti(lp, 1);
843 lagg_setflags(lp, 1);
844
845 if ((error = lagg_proto_addport(sc, lp)) != 0) {
846 /* Remove the port, without calling pr_delport. */
847 lagg_port_destroy(lp, 0);
848 return (error);
849 }
850
851 return (0);
852}
853
854#ifdef LAGG_PORT_STACKING
855static int
856lagg_port_checkstacking(struct lagg_softc *sc)
857{
858 struct lagg_softc *sc_ptr;
859 struct lagg_port *lp;
860 int m = 0;
861
862 LAGG_WLOCK_ASSERT(sc);
863
864 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
865 if (lp->lp_flags & LAGG_PORT_STACK) {
866 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
867 m = MAX(m, lagg_port_checkstacking(sc_ptr));
868 }
869 }
870
871 return (m + 1);
872}
873#endif
874
875static int
876lagg_port_destroy(struct lagg_port *lp, int rundelport)
877{
878 struct lagg_softc *sc = lp->lp_softc;
879 struct lagg_port *lp_ptr, *lp0;
880 struct lagg_llq *llq;
881 struct ifnet *ifp = lp->lp_ifp;
882 uint64_t *pval, vdiff;
883 int i;
884
885 LAGG_WLOCK_ASSERT(sc);
886
887 if (rundelport)
888 lagg_proto_delport(sc, lp);
889
890 /*
891 * Remove multicast addresses and interface flags from this port and
892 * reset the MAC address, skip if the interface is being detached.
893 */
894 if (!lp->lp_detaching) {
895 lagg_ether_cmdmulti(lp, 0);
896 lagg_setflags(lp, 0);
897 lagg_port_lladdr(lp, lp->lp_lladdr, LAGG_LLQTYPE_PHYS);
898 }
899
900 /* Restore interface */
901 ifp->if_type = lp->lp_iftype;
902 ifp->if_ioctl = lp->lp_ioctl;
903 ifp->if_output = lp->lp_output;
904 ifp->if_lagg = NULL;
905
906 /* Update detached port counters */
907 pval = lp->port_counters.val;
908 for (i = 0; i < IFCOUNTERS; i++, pval++) {
909 vdiff = ifp->if_get_counter(ifp, i) - *pval;
910 sc->detached_counters.val[i] += vdiff;
911 }
912
913 /* Finally, remove the port from the lagg */
914 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
915 sc->sc_count--;
916
917 /* Update the primary interface */
918 if (lp == sc->sc_primary) {
919 uint8_t lladdr[ETHER_ADDR_LEN];
920
921 if ((lp0 = SLIST_FIRST(&sc->sc_ports)) == NULL) {
922 bzero(&lladdr, ETHER_ADDR_LEN);
923 } else {
924 bcopy(lp0->lp_lladdr,
925 lladdr, ETHER_ADDR_LEN);
926 }
927 lagg_lladdr(sc, lladdr);
928
929 /* Mark lp0 as new primary */
930 sc->sc_primary = lp0;
931
932 /*
933 * Enqueue lladdr update/notification for each port
934 * (new primary needs update as well, to switch from
935 * old lladdr to its 'real' one).
936 */
937 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
938 lagg_port_lladdr(lp_ptr, lladdr, LAGG_LLQTYPE_PHYS);
939 }
940
941 /* Remove any pending lladdr changes from the queue */
942 if (lp->lp_detaching) {
943 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
944 if (llq->llq_ifp == ifp) {
945 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
946 llq_entries);
947 free(llq, M_DEVBUF);
948 break; /* Only appears once */
949 }
950 }
951 }
952
953 if (lp->lp_ifflags)
954 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
955
956 free(lp, M_DEVBUF);
957
958 /* Update lagg capabilities */
959 lagg_capabilities(sc);
960 lagg_linkstate(sc);
961
962 return (0);
963}
964
965static int
966lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
967{
968 struct lagg_reqport *rp = (struct lagg_reqport *)data;
969 struct lagg_softc *sc;
970 struct lagg_port *lp = NULL;
971 int error = 0;
972 struct rm_priotracker tracker;
973
974 /* Should be checked by the caller */
975 if (ifp->if_type != IFT_IEEE8023ADLAG ||
976 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
977 goto fallback;
978
979 switch (cmd) {
980 case SIOCGLAGGPORT:
981 if (rp->rp_portname[0] == '\0' ||
982 ifunit(rp->rp_portname) != ifp) {
983 error = EINVAL;
984 break;
985 }
986
987 LAGG_RLOCK(sc, &tracker);
988 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
989 error = ENOENT;
990 LAGG_RUNLOCK(sc, &tracker);
991 break;
992 }
993
994 lagg_port2req(lp, rp);
995 LAGG_RUNLOCK(sc, &tracker);
996 break;
997
998 case SIOCSIFCAP:
999 if (lp->lp_ioctl == NULL) {
1000 error = EINVAL;
1001 break;
1002 }
1003 error = (*lp->lp_ioctl)(ifp, cmd, data);
1004 if (error)
1005 break;
1006
1007 /* Update lagg interface capabilities */
1008 LAGG_WLOCK(sc);
1009 lagg_capabilities(sc);
1010 LAGG_WUNLOCK(sc);
1011 break;
1012
1013 case SIOCSIFMTU:
1014 /* Do not allow the MTU to be changed once joined */
1015 error = EINVAL;
1016 break;
1017
1018 default:
1019 goto fallback;
1020 }
1021
1022 return (error);
1023
1024fallback:
1025 if (lp->lp_ioctl != NULL)
1026 return ((*lp->lp_ioctl)(ifp, cmd, data));
1027
1028 return (EINVAL);
1029}
1030
1031/*
1032 * Requests counter @cnt data.
1033 *
1034 * Counter value is calculated the following way:
1035 * 1) for each port, sum difference between current and "initial" measurements.
1036 * 2) add lagg logical interface counters.
1037 * 3) add data from detached_counters array.
1038 *
1039 * We also do the following things on ports attach/detach:
1040 * 1) On port attach we store all counters it has into port_counter array.
1041 * 2) On port detach we add the different between "initial" and
1042 * current counters data to detached_counters array.
1043 */
1044static uint64_t
1045lagg_get_counter(struct ifnet *ifp, ift_counter cnt)
1046{
1047 struct lagg_softc *sc;
1048 struct lagg_port *lp;
1049 struct ifnet *lpifp;
1050 struct rm_priotracker tracker;
1051 uint64_t newval, oldval, vsum;
1052
1053 /* Revise this when we've got non-generic counters. */
1054 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1055
1056 sc = (struct lagg_softc *)ifp->if_softc;
1057 LAGG_RLOCK(sc, &tracker);
1058
1059 vsum = 0;
1060 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1061 /* Saved attached value */
1062 oldval = lp->port_counters.val[cnt];
1063 /* current value */
1064 lpifp = lp->lp_ifp;
1065 newval = lpifp->if_get_counter(lpifp, cnt);
1066 /* Calculate diff and save new */
1067 vsum += newval - oldval;
1068 }
1069
1070 /*
1071 * Add counter data which might be added by upper
1072 * layer protocols operating on logical interface.
1073 */
1074 vsum += if_get_counter_default(ifp, cnt);
1075
1076 /*
1077 * Add counter data from detached ports counters
1078 */
1079 vsum += sc->detached_counters.val[cnt];
1080
1081 LAGG_RUNLOCK(sc, &tracker);
1082
1083 return (vsum);
1084}
1085
1086/*
1087 * For direct output to child ports.
1088 */
1089static int
1090lagg_port_output(struct ifnet *ifp, struct mbuf *m,
1091 const struct sockaddr *dst, struct route *ro)
1092{
1093 struct lagg_port *lp = ifp->if_lagg;
1094
1095 switch (dst->sa_family) {
1096 case pseudo_AF_HDRCMPLT:
1097 case AF_UNSPEC:
1098 return ((*lp->lp_output)(ifp, m, dst, ro));
1099 }
1100
1101 /* drop any other frames */
1102 m_freem(m);
1103 return (ENETDOWN);
1104}
1105
1106static void
1107lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
1108{
1109 struct lagg_port *lp;
1110 struct lagg_softc *sc;
1111
1112 if ((lp = ifp->if_lagg) == NULL)
1113 return;
1114 /* If the ifnet is just being renamed, don't do anything. */
1115 if (ifp->if_flags & IFF_RENAMING)
1116 return;
1117
1118 sc = lp->lp_softc;
1119
1120 LAGG_WLOCK(sc);
1121 lp->lp_detaching = 1;
1122 lagg_port_destroy(lp, 1);
1123 LAGG_WUNLOCK(sc);
1124}
1125
1126static void
1127lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
1128{
1129 struct lagg_softc *sc = lp->lp_softc;
1130
1131 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
1132 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
1133 rp->rp_prio = lp->lp_prio;
1134 rp->rp_flags = lp->lp_flags;
1135 lagg_proto_portreq(sc, lp, &rp->rp_psc);
1136
1137 /* Add protocol specific flags */
1138 switch (sc->sc_proto) {
1139 case LAGG_PROTO_FAILOVER:
1140 if (lp == sc->sc_primary)
1141 rp->rp_flags |= LAGG_PORT_MASTER;
1142 if (lp == lagg_link_active(sc, sc->sc_primary))
1143 rp->rp_flags |= LAGG_PORT_ACTIVE;
1144 break;
1145
1146 case LAGG_PROTO_ROUNDROBIN:
1147 case LAGG_PROTO_LOADBALANCE:
1148 case LAGG_PROTO_BROADCAST:
1149 if (LAGG_PORTACTIVE(lp))
1150 rp->rp_flags |= LAGG_PORT_ACTIVE;
1151 break;
1152
1153 case LAGG_PROTO_LACP:
1154 /* LACP has a different definition of active */
1155 if (lacp_isactive(lp))
1156 rp->rp_flags |= LAGG_PORT_ACTIVE;
1157 if (lacp_iscollecting(lp))
1158 rp->rp_flags |= LAGG_PORT_COLLECTING;
1159 if (lacp_isdistributing(lp))
1160 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
1161 break;
1162 }
1163
1164}
1165
1166static void
1167lagg_init(void *xsc)
1168{
1169 struct lagg_softc *sc = (struct lagg_softc *)xsc;
1170 struct ifnet *ifp = sc->sc_ifp;
1171 struct lagg_port *lp;
1172
1173 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1174 return;
1175
1176 LAGG_WLOCK(sc);
1177
1178 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1179
1180 /*
1181 * Update the port lladdrs if needed.
1182 * This might be if_setlladdr() notification
1183 * that lladdr has been changed.
1184 */
1185 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1186 lagg_port_lladdr(lp, IF_LLADDR(ifp), LAGG_LLQTYPE_PHYS);
1187
1188 lagg_proto_init(sc);
1189
1190 LAGG_WUNLOCK(sc);
1191}
1192
1193static void
1194lagg_stop(struct lagg_softc *sc)
1195{
1196 struct ifnet *ifp = sc->sc_ifp;
1197
1198 LAGG_WLOCK_ASSERT(sc);
1199
1200 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1201 return;
1202
1203 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1204
1205 lagg_proto_stop(sc);
1206}
1207
1208static int
1209lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1210{
1211 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1212 struct lagg_reqall *ra = (struct lagg_reqall *)data;
1213 struct lagg_reqopts *ro = (struct lagg_reqopts *)data;
1214 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
1215 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
1216 struct ifreq *ifr = (struct ifreq *)data;
1217 struct lagg_port *lp;
1218 struct ifnet *tpif;
1219 struct thread *td = curthread;
1220 char *buf, *outbuf;
1221 int count, buflen, len, error = 0;
1222 struct rm_priotracker tracker;
1223
1224 bzero(&rpbuf, sizeof(rpbuf));
1225
1226 switch (cmd) {
1227 case SIOCGLAGG:
1228 LAGG_RLOCK(sc, &tracker);
1229 count = 0;
1230 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1231 count++;
1232 buflen = count * sizeof(struct lagg_reqport);
1233 LAGG_RUNLOCK(sc, &tracker);
1234
1235 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1236
1237 LAGG_RLOCK(sc, &tracker);
1238 ra->ra_proto = sc->sc_proto;
1239 lagg_proto_request(sc, &ra->ra_psc);
1240 count = 0;
1241 buf = outbuf;
1242 len = min(ra->ra_size, buflen);
1243 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1244 if (len < sizeof(rpbuf))
1245 break;
1246
1247 lagg_port2req(lp, &rpbuf);
1248 memcpy(buf, &rpbuf, sizeof(rpbuf));
1249 count++;
1250 buf += sizeof(rpbuf);
1251 len -= sizeof(rpbuf);
1252 }
1253 LAGG_RUNLOCK(sc, &tracker);
1254 ra->ra_ports = count;
1255 ra->ra_size = count * sizeof(rpbuf);
1256 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1257 free(outbuf, M_TEMP);
1258 break;
1259 case SIOCSLAGG:
1260 error = priv_check(td, PRIV_NET_LAGG);
1261 if (error)
1262 break;
|
1264 error = EPROTONOSUPPORT;
1265 break;
1266 }
1267
1268 LAGG_WLOCK(sc);
1269 lagg_proto_detach(sc);
1270 LAGG_UNLOCK_ASSERT(sc);
1271 lagg_proto_attach(sc, ra->ra_proto);
1272 break;
1273 case SIOCGLAGGOPTS:
1274 ro->ro_opts = sc->sc_opts;
1275 if (sc->sc_proto == LAGG_PROTO_LACP) {
1276 struct lacp_softc *lsc;
1277
1278 lsc = (struct lacp_softc *)sc->sc_psc;
1279 if (lsc->lsc_debug.lsc_tx_test != 0)
1280 ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
1281 if (lsc->lsc_debug.lsc_rx_test != 0)
1282 ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
1283 if (lsc->lsc_strict_mode != 0)
1284 ro->ro_opts |= LAGG_OPT_LACP_STRICT;
1285 if (lsc->lsc_fast_timeout != 0)
1286 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT;
1287
1288 ro->ro_active = sc->sc_active;
1289 } else {
1290 ro->ro_active = 0;
1291 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1292 ro->ro_active += LAGG_PORTACTIVE(lp);
1293 }
1294 ro->ro_bkt = sc->sc_bkt;
1295 ro->ro_flapping = sc->sc_flapping;
1296 ro->ro_flowid_shift = sc->flowid_shift;
1297 break;
1298 case SIOCSLAGGOPTS:
1299 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) {
1300 if (ro->ro_bkt == 0)
1301 sc->sc_bkt = 1; // Minimum 1 packet per iface.
1302 else
1303 sc->sc_bkt = ro->ro_bkt;
1304 }
1305 error = priv_check(td, PRIV_NET_LAGG);
1306 if (error)
1307 break;
1308 if (ro->ro_opts == 0)
1309 break;
1310 /*
1311 * Set options. LACP options are stored in sc->sc_psc,
1312 * not in sc_opts.
1313 */
1314 int valid, lacp;
1315
1316 switch (ro->ro_opts) {
1317 case LAGG_OPT_USE_FLOWID:
1318 case -LAGG_OPT_USE_FLOWID:
1319 case LAGG_OPT_FLOWIDSHIFT:
1320 valid = 1;
1321 lacp = 0;
1322 break;
1323 case LAGG_OPT_LACP_TXTEST:
1324 case -LAGG_OPT_LACP_TXTEST:
1325 case LAGG_OPT_LACP_RXTEST:
1326 case -LAGG_OPT_LACP_RXTEST:
1327 case LAGG_OPT_LACP_STRICT:
1328 case -LAGG_OPT_LACP_STRICT:
1329 case LAGG_OPT_LACP_TIMEOUT:
1330 case -LAGG_OPT_LACP_TIMEOUT:
1331 valid = lacp = 1;
1332 break;
1333 default:
1334 valid = lacp = 0;
1335 break;
1336 }
1337
1338 LAGG_WLOCK(sc);
1339
1340 if (valid == 0 ||
1341 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
1342 /* Invalid combination of options specified. */
1343 error = EINVAL;
1344 LAGG_WUNLOCK(sc);
1345 break; /* Return from SIOCSLAGGOPTS. */
1346 }
1347 /*
1348 * Store new options into sc->sc_opts except for
1349 * FLOWIDSHIFT and LACP options.
1350 */
1351 if (lacp == 0) {
1352 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
1353 sc->flowid_shift = ro->ro_flowid_shift;
1354 else if (ro->ro_opts > 0)
1355 sc->sc_opts |= ro->ro_opts;
1356 else
1357 sc->sc_opts &= ~ro->ro_opts;
1358 } else {
1359 struct lacp_softc *lsc;
1360 struct lacp_port *lp;
1361
1362 lsc = (struct lacp_softc *)sc->sc_psc;
1363
1364 switch (ro->ro_opts) {
1365 case LAGG_OPT_LACP_TXTEST:
1366 lsc->lsc_debug.lsc_tx_test = 1;
1367 break;
1368 case -LAGG_OPT_LACP_TXTEST:
1369 lsc->lsc_debug.lsc_tx_test = 0;
1370 break;
1371 case LAGG_OPT_LACP_RXTEST:
1372 lsc->lsc_debug.lsc_rx_test = 1;
1373 break;
1374 case -LAGG_OPT_LACP_RXTEST:
1375 lsc->lsc_debug.lsc_rx_test = 0;
1376 break;
1377 case LAGG_OPT_LACP_STRICT:
1378 lsc->lsc_strict_mode = 1;
1379 break;
1380 case -LAGG_OPT_LACP_STRICT:
1381 lsc->lsc_strict_mode = 0;
1382 break;
1383 case LAGG_OPT_LACP_TIMEOUT:
1384 LACP_LOCK(lsc);
1385 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1386 lp->lp_state |= LACP_STATE_TIMEOUT;
1387 LACP_UNLOCK(lsc);
1388 lsc->lsc_fast_timeout = 1;
1389 break;
1390 case -LAGG_OPT_LACP_TIMEOUT:
1391 LACP_LOCK(lsc);
1392 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1393 lp->lp_state &= ~LACP_STATE_TIMEOUT;
1394 LACP_UNLOCK(lsc);
1395 lsc->lsc_fast_timeout = 0;
1396 break;
1397 }
1398 }
1399 LAGG_WUNLOCK(sc);
1400 break;
1401 case SIOCGLAGGFLAGS:
1402 rf->rf_flags = 0;
1403 LAGG_RLOCK(sc, &tracker);
1404 if (sc->sc_flags & MBUF_HASHFLAG_L2)
1405 rf->rf_flags |= LAGG_F_HASHL2;
1406 if (sc->sc_flags & MBUF_HASHFLAG_L3)
1407 rf->rf_flags |= LAGG_F_HASHL3;
1408 if (sc->sc_flags & MBUF_HASHFLAG_L4)
1409 rf->rf_flags |= LAGG_F_HASHL4;
1410 LAGG_RUNLOCK(sc, &tracker);
1411 break;
1412 case SIOCSLAGGHASH:
1413 error = priv_check(td, PRIV_NET_LAGG);
1414 if (error)
1415 break;
1416 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1417 error = EINVAL;
1418 break;
1419 }
1420 LAGG_WLOCK(sc);
1421 sc->sc_flags = 0;
1422 if (rf->rf_flags & LAGG_F_HASHL2)
1423 sc->sc_flags |= MBUF_HASHFLAG_L2;
1424 if (rf->rf_flags & LAGG_F_HASHL3)
1425 sc->sc_flags |= MBUF_HASHFLAG_L3;
1426 if (rf->rf_flags & LAGG_F_HASHL4)
1427 sc->sc_flags |= MBUF_HASHFLAG_L4;
1428 LAGG_WUNLOCK(sc);
1429 break;
1430 case SIOCGLAGGPORT:
1431 if (rp->rp_portname[0] == '\0' ||
1432 (tpif = ifunit(rp->rp_portname)) == NULL) {
1433 error = EINVAL;
1434 break;
1435 }
1436
1437 LAGG_RLOCK(sc, &tracker);
1438 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1439 lp->lp_softc != sc) {
1440 error = ENOENT;
1441 LAGG_RUNLOCK(sc, &tracker);
1442 break;
1443 }
1444
1445 lagg_port2req(lp, rp);
1446 LAGG_RUNLOCK(sc, &tracker);
1447 break;
1448 case SIOCSLAGGPORT:
1449 error = priv_check(td, PRIV_NET_LAGG);
1450 if (error)
1451 break;
1452 if (rp->rp_portname[0] == '\0' ||
1453 (tpif = ifunit(rp->rp_portname)) == NULL) {
1454 error = EINVAL;
1455 break;
1456 }
1457#ifdef INET6
1458 /*
1459 * A laggport interface should not have inet6 address
1460 * because two interfaces with a valid link-local
1461 * scope zone must not be merged in any form. This
1462 * restriction is needed to prevent violation of
1463 * link-local scope zone. Attempts to add a laggport
1464 * interface which has inet6 addresses triggers
1465 * removal of all inet6 addresses on the member
1466 * interface.
1467 */
1468 if (in6ifa_llaonifp(tpif)) {
1469 in6_ifdetach(tpif);
1470 if_printf(sc->sc_ifp,
1471 "IPv6 addresses on %s have been removed "
1472 "before adding it as a member to prevent "
1473 "IPv6 address scope violation.\n",
1474 tpif->if_xname);
1475 }
1476#endif
1477 LAGG_WLOCK(sc);
1478 error = lagg_port_create(sc, tpif);
1479 LAGG_WUNLOCK(sc);
1480 break;
1481 case SIOCSLAGGDELPORT:
1482 error = priv_check(td, PRIV_NET_LAGG);
1483 if (error)
1484 break;
1485 if (rp->rp_portname[0] == '\0' ||
1486 (tpif = ifunit(rp->rp_portname)) == NULL) {
1487 error = EINVAL;
1488 break;
1489 }
1490
1491 LAGG_WLOCK(sc);
1492 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1493 lp->lp_softc != sc) {
1494 error = ENOENT;
1495 LAGG_WUNLOCK(sc);
1496 break;
1497 }
1498
1499 error = lagg_port_destroy(lp, 1);
1500 LAGG_WUNLOCK(sc);
1501 break;
1502 case SIOCSIFFLAGS:
1503 /* Set flags on ports too */
1504 LAGG_WLOCK(sc);
1505 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1506 lagg_setflags(lp, 1);
1507 }
1508 LAGG_WUNLOCK(sc);
1509
1510 if (!(ifp->if_flags & IFF_UP) &&
1511 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1512 /*
1513 * If interface is marked down and it is running,
1514 * then stop and disable it.
1515 */
1516 LAGG_WLOCK(sc);
1517 lagg_stop(sc);
1518 LAGG_WUNLOCK(sc);
1519 } else if ((ifp->if_flags & IFF_UP) &&
1520 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1521 /*
1522 * If interface is marked up and it is stopped, then
1523 * start it.
1524 */
1525 (*ifp->if_init)(sc);
1526 }
1527 break;
1528 case SIOCADDMULTI:
1529 case SIOCDELMULTI:
1530 LAGG_WLOCK(sc);
1531 error = lagg_ether_setmulti(sc);
1532 LAGG_WUNLOCK(sc);
1533 break;
1534 case SIOCSIFMEDIA:
1535 case SIOCGIFMEDIA:
1536 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1537 break;
1538
1539 case SIOCSIFCAP:
1540 case SIOCSIFMTU:
1541 /* Do not allow the MTU or caps to be directly changed */
1542 error = EINVAL;
1543 break;
1544
1545 default:
1546 error = ether_ioctl(ifp, cmd, data);
1547 break;
1548 }
1549 return (error);
1550}
1551
1552static int
1553lagg_ether_setmulti(struct lagg_softc *sc)
1554{
1555 struct lagg_port *lp;
1556
1557 LAGG_WLOCK_ASSERT(sc);
1558
1559 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1560 /* First, remove any existing filter entries. */
1561 lagg_ether_cmdmulti(lp, 0);
1562 /* copy all addresses from the lagg interface to the port */
1563 lagg_ether_cmdmulti(lp, 1);
1564 }
1565 return (0);
1566}
1567
1568static int
1569lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1570{
1571 struct lagg_softc *sc = lp->lp_softc;
1572 struct ifnet *ifp = lp->lp_ifp;
1573 struct ifnet *scifp = sc->sc_ifp;
1574 struct lagg_mc *mc;
1575 struct ifmultiaddr *ifma;
1576 int error;
1577
1578 LAGG_WLOCK_ASSERT(sc);
1579
1580 if (set) {
1581 IF_ADDR_WLOCK(scifp);
1582 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1583 if (ifma->ifma_addr->sa_family != AF_LINK)
1584 continue;
1585 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1586 if (mc == NULL) {
1587 IF_ADDR_WUNLOCK(scifp);
1588 return (ENOMEM);
1589 }
1590 bcopy(ifma->ifma_addr, &mc->mc_addr,
1591 ifma->ifma_addr->sa_len);
1592 mc->mc_addr.sdl_index = ifp->if_index;
1593 mc->mc_ifma = NULL;
1594 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1595 }
1596 IF_ADDR_WUNLOCK(scifp);
1597 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
1598 error = if_addmulti(ifp,
1599 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
1600 if (error)
1601 return (error);
1602 }
1603 } else {
1604 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1605 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1606 if (mc->mc_ifma && !lp->lp_detaching)
1607 if_delmulti_ifma(mc->mc_ifma);
1608 free(mc, M_DEVBUF);
1609 }
1610 }
1611 return (0);
1612}
1613
1614/* Handle a ref counted flag that should be set on the lagg port as well */
1615static int
1616lagg_setflag(struct lagg_port *lp, int flag, int status,
1617 int (*func)(struct ifnet *, int))
1618{
1619 struct lagg_softc *sc = lp->lp_softc;
1620 struct ifnet *scifp = sc->sc_ifp;
1621 struct ifnet *ifp = lp->lp_ifp;
1622 int error;
1623
1624 LAGG_WLOCK_ASSERT(sc);
1625
1626 status = status ? (scifp->if_flags & flag) : 0;
1627 /* Now "status" contains the flag value or 0 */
1628
1629 /*
1630 * See if recorded ports status is different from what
1631 * we want it to be. If it is, flip it. We record ports
1632 * status in lp_ifflags so that we won't clear ports flag
1633 * we haven't set. In fact, we don't clear or set ports
1634 * flags directly, but get or release references to them.
1635 * That's why we can be sure that recorded flags still are
1636 * in accord with actual ports flags.
1637 */
1638 if (status != (lp->lp_ifflags & flag)) {
1639 error = (*func)(ifp, status);
1640 if (error)
1641 return (error);
1642 lp->lp_ifflags &= ~flag;
1643 lp->lp_ifflags |= status;
1644 }
1645 return (0);
1646}
1647
1648/*
1649 * Handle IFF_* flags that require certain changes on the lagg port
1650 * if "status" is true, update ports flags respective to the lagg
1651 * if "status" is false, forcedly clear the flags set on port.
1652 */
1653static int
1654lagg_setflags(struct lagg_port *lp, int status)
1655{
1656 int error, i;
1657
1658 for (i = 0; lagg_pflags[i].flag; i++) {
1659 error = lagg_setflag(lp, lagg_pflags[i].flag,
1660 status, lagg_pflags[i].func);
1661 if (error)
1662 return (error);
1663 }
1664 return (0);
1665}
1666
1667static int
1668lagg_transmit(struct ifnet *ifp, struct mbuf *m)
1669{
1670 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1671 int error, len, mcast;
1672 struct rm_priotracker tracker;
1673
1674 len = m->m_pkthdr.len;
1675 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
1676
1677 LAGG_RLOCK(sc, &tracker);
1678 /* We need a Tx algorithm and at least one port */
1679 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
1680 LAGG_RUNLOCK(sc, &tracker);
1681 m_freem(m);
1682 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1683 return (ENXIO);
1684 }
1685
1686 ETHER_BPF_MTAP(ifp, m);
1687
1688 error = lagg_proto_start(sc, m);
1689 LAGG_RUNLOCK(sc, &tracker);
1690
1691 if (error != 0)
1692 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1693
1694 return (error);
1695}
1696
1697/*
1698 * The ifp->if_qflush entry point for lagg(4) is no-op.
1699 */
1700static void
1701lagg_qflush(struct ifnet *ifp __unused)
1702{
1703}
1704
1705static struct mbuf *
1706lagg_input(struct ifnet *ifp, struct mbuf *m)
1707{
1708 struct lagg_port *lp = ifp->if_lagg;
1709 struct lagg_softc *sc = lp->lp_softc;
1710 struct ifnet *scifp = sc->sc_ifp;
1711 struct rm_priotracker tracker;
1712
1713 LAGG_RLOCK(sc, &tracker);
1714 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1715 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1716 sc->sc_proto == LAGG_PROTO_NONE) {
1717 LAGG_RUNLOCK(sc, &tracker);
1718 m_freem(m);
1719 return (NULL);
1720 }
1721
1722 ETHER_BPF_MTAP(scifp, m);
1723
1724 if (lp->lp_detaching != 0) {
1725 m_freem(m);
1726 m = NULL;
1727 } else
1728 m = lagg_proto_input(sc, lp, m);
1729
1730 if (m != NULL) {
1731 if (scifp->if_flags & IFF_MONITOR) {
1732 m_freem(m);
1733 m = NULL;
1734 }
1735 }
1736
1737 LAGG_RUNLOCK(sc, &tracker);
1738 return (m);
1739}
1740
1741static int
1742lagg_media_change(struct ifnet *ifp)
1743{
1744 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1745
1746 if (sc->sc_ifflags & IFF_DEBUG)
1747 printf("%s\n", __func__);
1748
1749 /* Ignore */
1750 return (0);
1751}
1752
1753static void
1754lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1755{
1756 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1757 struct lagg_port *lp;
1758 struct rm_priotracker tracker;
1759
1760 imr->ifm_status = IFM_AVALID;
1761 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1762
1763 LAGG_RLOCK(sc, &tracker);
1764 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1765 if (LAGG_PORTACTIVE(lp))
1766 imr->ifm_status |= IFM_ACTIVE;
1767 }
1768 LAGG_RUNLOCK(sc, &tracker);
1769}
1770
1771static void
1772lagg_linkstate(struct lagg_softc *sc)
1773{
1774 struct lagg_port *lp;
1775 int new_link = LINK_STATE_DOWN;
1776 uint64_t speed;
1777
1778 /* Our link is considered up if at least one of our ports is active */
1779 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1780 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) {
1781 new_link = LINK_STATE_UP;
1782 break;
1783 }
1784 }
1785 if_link_state_change(sc->sc_ifp, new_link);
1786
1787 /* Update if_baudrate to reflect the max possible speed */
1788 switch (sc->sc_proto) {
1789 case LAGG_PROTO_FAILOVER:
1790 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
1791 sc->sc_primary->lp_ifp->if_baudrate : 0;
1792 break;
1793 case LAGG_PROTO_ROUNDROBIN:
1794 case LAGG_PROTO_LOADBALANCE:
1795 case LAGG_PROTO_BROADCAST:
1796 speed = 0;
1797 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1798 speed += lp->lp_ifp->if_baudrate;
1799 sc->sc_ifp->if_baudrate = speed;
1800 break;
1801 case LAGG_PROTO_LACP:
1802 /* LACP updates if_baudrate itself */
1803 break;
1804 }
1805}
1806
1807static void
1808lagg_port_state(struct ifnet *ifp, int state)
1809{
1810 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1811 struct lagg_softc *sc = NULL;
1812
1813 if (lp != NULL)
1814 sc = lp->lp_softc;
1815 if (sc == NULL)
1816 return;
1817
1818 LAGG_WLOCK(sc);
1819 lagg_linkstate(sc);
1820 lagg_proto_linkstate(sc, lp);
1821 LAGG_WUNLOCK(sc);
1822}
1823
1824struct lagg_port *
1825lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1826{
1827 struct lagg_port *lp_next, *rval = NULL;
1828 // int new_link = LINK_STATE_DOWN;
1829
1830 LAGG_RLOCK_ASSERT(sc);
1831 /*
1832 * Search a port which reports an active link state.
1833 */
1834
1835 if (lp == NULL)
1836 goto search;
1837 if (LAGG_PORTACTIVE(lp)) {
1838 rval = lp;
1839 goto found;
1840 }
1841 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1842 LAGG_PORTACTIVE(lp_next)) {
1843 rval = lp_next;
1844 goto found;
1845 }
1846
1847search:
1848 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1849 if (LAGG_PORTACTIVE(lp_next)) {
1850 rval = lp_next;
1851 goto found;
1852 }
1853 }
1854
1855found:
1856 if (rval != NULL) {
1857 /*
1858 * The IEEE 802.1D standard assumes that a lagg with
1859 * multiple ports is always full duplex. This is valid
1860 * for load sharing laggs and if at least two links
1861 * are active. Unfortunately, checking the latter would
1862 * be too expensive at this point.
1863 XXX
1864 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1865 (sc->sc_count > 1))
1866 new_link = LINK_STATE_FULL_DUPLEX;
1867 else
1868 new_link = rval->lp_link_state;
1869 */
1870 }
1871
1872 return (rval);
1873}
1874
1875int
1876lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1877{
1878
1879 return (ifp->if_transmit)(ifp, m);
1880}
1881
1882/*
1883 * Simple round robin aggregation
1884 */
1885static void
1886lagg_rr_attach(struct lagg_softc *sc)
1887{
1888 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1889 sc->sc_seq = 0;
1890 sc->sc_bkt_count = sc->sc_bkt;
1891}
1892
1893static int
1894lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1895{
1896 struct lagg_port *lp;
1897 uint32_t p;
1898
1899 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0)
1900 sc->sc_bkt_count = sc->sc_bkt;
1901
1902 if (sc->sc_bkt > 0) {
1903 atomic_subtract_int(&sc->sc_bkt_count, 1);
1904 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt))
1905 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1906 else
1907 p = sc->sc_seq;
1908 } else
1909 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1910
1911 p %= sc->sc_count;
1912 lp = SLIST_FIRST(&sc->sc_ports);
1913
1914 while (p--)
1915 lp = SLIST_NEXT(lp, lp_entries);
1916
1917 /*
1918 * Check the port's link state. This will return the next active
1919 * port if the link is down or the port is NULL.
1920 */
1921 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1922 m_freem(m);
1923 return (ENETDOWN);
1924 }
1925
1926 /* Send mbuf */
1927 return (lagg_enqueue(lp->lp_ifp, m));
1928}
1929
1930static struct mbuf *
1931lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1932{
1933 struct ifnet *ifp = sc->sc_ifp;
1934
1935 /* Just pass in the packet to our lagg device */
1936 m->m_pkthdr.rcvif = ifp;
1937
1938 return (m);
1939}
1940
1941/*
1942 * Broadcast mode
1943 */
1944static int
1945lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m)
1946{
1947 int active_ports = 0;
1948 int errors = 0;
1949 int ret;
1950 struct lagg_port *lp, *last = NULL;
1951 struct mbuf *m0;
1952
1953 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1954 if (!LAGG_PORTACTIVE(lp))
1955 continue;
1956
1957 active_ports++;
1958
1959 if (last != NULL) {
1960 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT);
1961 if (m0 == NULL) {
1962 ret = ENOBUFS;
1963 errors++;
1964 break;
1965 }
1966
1967 ret = lagg_enqueue(last->lp_ifp, m0);
1968 if (ret != 0)
1969 errors++;
1970 }
1971 last = lp;
1972 }
1973 if (last == NULL) {
1974 m_freem(m);
1975 return (ENOENT);
1976 }
1977 if ((last = lagg_link_active(sc, last)) == NULL) {
1978 m_freem(m);
1979 return (ENETDOWN);
1980 }
1981
1982 ret = lagg_enqueue(last->lp_ifp, m);
1983 if (ret != 0)
1984 errors++;
1985
1986 if (errors == 0)
1987 return (ret);
1988
1989 return (0);
1990}
1991
1992static struct mbuf*
1993lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1994{
1995 struct ifnet *ifp = sc->sc_ifp;
1996
1997 /* Just pass in the packet to our lagg device */
1998 m->m_pkthdr.rcvif = ifp;
1999 return (m);
2000}
2001
2002/*
2003 * Active failover
2004 */
2005static int
2006lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
2007{
2008 struct lagg_port *lp;
2009
2010 /* Use the master port if active or the next available port */
2011 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
2012 m_freem(m);
2013 return (ENETDOWN);
2014 }
2015
2016 /* Send mbuf */
2017 return (lagg_enqueue(lp->lp_ifp, m));
2018}
2019
2020static struct mbuf *
2021lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2022{
2023 struct ifnet *ifp = sc->sc_ifp;
2024 struct lagg_port *tmp_tp;
2025
2026 if (lp == sc->sc_primary || V_lagg_failover_rx_all) {
2027 m->m_pkthdr.rcvif = ifp;
2028 return (m);
2029 }
2030
2031 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
2032 tmp_tp = lagg_link_active(sc, sc->sc_primary);
2033 /*
2034 * If tmp_tp is null, we've recieved a packet when all
2035 * our links are down. Weird, but process it anyways.
2036 */
2037 if ((tmp_tp == NULL || tmp_tp == lp)) {
2038 m->m_pkthdr.rcvif = ifp;
2039 return (m);
2040 }
2041 }
2042
2043 m_freem(m);
2044 return (NULL);
2045}
2046
2047/*
2048 * Loadbalancing
2049 */
2050static void
2051lagg_lb_attach(struct lagg_softc *sc)
2052{
2053 struct lagg_port *lp;
2054 struct lagg_lb *lb;
2055
2056 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO);
2057
2058 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
2059
2060 lb->lb_key = m_ether_tcpip_hash_init();
2061 sc->sc_psc = lb;
2062
2063 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2064 lagg_lb_port_create(lp);
2065}
2066
2067static void
2068lagg_lb_detach(struct lagg_softc *sc)
2069{
2070 struct lagg_lb *lb;
2071
2072 lb = (struct lagg_lb *)sc->sc_psc;
2073 LAGG_WUNLOCK(sc);
2074 if (lb != NULL)
2075 free(lb, M_DEVBUF);
2076}
2077
2078static int
2079lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
2080{
2081 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2082 struct lagg_port *lp_next;
2083 int i = 0;
2084
2085 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
2086 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2087 if (lp_next == lp)
2088 continue;
2089 if (i >= LAGG_MAX_PORTS)
2090 return (EINVAL);
2091 if (sc->sc_ifflags & IFF_DEBUG)
2092 printf("%s: port %s at index %d\n",
2093 sc->sc_ifname, lp_next->lp_ifp->if_xname, i);
2094 lb->lb_ports[i++] = lp_next;
2095 }
2096
2097 return (0);
2098}
2099
2100static int
2101lagg_lb_port_create(struct lagg_port *lp)
2102{
2103 struct lagg_softc *sc = lp->lp_softc;
2104 return (lagg_lb_porttable(sc, NULL));
2105}
2106
2107static void
2108lagg_lb_port_destroy(struct lagg_port *lp)
2109{
2110 struct lagg_softc *sc = lp->lp_softc;
2111 lagg_lb_porttable(sc, lp);
2112}
2113
2114static int
2115lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
2116{
2117 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2118 struct lagg_port *lp = NULL;
2119 uint32_t p = 0;
2120
2121 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
2122 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
2123 p = m->m_pkthdr.flowid >> sc->flowid_shift;
2124 else
2125 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key);
2126 p %= sc->sc_count;
2127 lp = lb->lb_ports[p];
2128
2129 /*
2130 * Check the port's link state. This will return the next active
2131 * port if the link is down or the port is NULL.
2132 */
2133 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2134 m_freem(m);
2135 return (ENETDOWN);
2136 }
2137
2138 /* Send mbuf */
2139 return (lagg_enqueue(lp->lp_ifp, m));
2140}
2141
2142static struct mbuf *
2143lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2144{
2145 struct ifnet *ifp = sc->sc_ifp;
2146
2147 /* Just pass in the packet to our lagg device */
2148 m->m_pkthdr.rcvif = ifp;
2149
2150 return (m);
2151}
2152
2153/*
2154 * 802.3ad LACP
2155 */
2156static void
2157lagg_lacp_attach(struct lagg_softc *sc)
2158{
2159 struct lagg_port *lp;
2160
2161 lacp_attach(sc);
2162 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2163 lacp_port_create(lp);
2164}
2165
2166static void
2167lagg_lacp_detach(struct lagg_softc *sc)
2168{
2169 struct lagg_port *lp;
2170 void *psc;
2171
2172 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2173 lacp_port_destroy(lp);
2174
2175 psc = sc->sc_psc;
2176 sc->sc_psc = NULL;
2177 LAGG_WUNLOCK(sc);
2178
2179 lacp_detach(psc);
2180}
2181
2182static void
2183lagg_lacp_lladdr(struct lagg_softc *sc)
2184{
2185 struct lagg_port *lp;
2186
2187 /* purge all the lacp ports */
2188 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2189 lacp_port_destroy(lp);
2190
2191 /* add them back in */
2192 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2193 lacp_port_create(lp);
2194}
2195
2196static int
2197lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
2198{
2199 struct lagg_port *lp;
2200
2201 lp = lacp_select_tx_port(sc, m);
2202 if (lp == NULL) {
2203 m_freem(m);
2204 return (ENETDOWN);
2205 }
2206
2207 /* Send mbuf */
2208 return (lagg_enqueue(lp->lp_ifp, m));
2209}
2210
2211static struct mbuf *
2212lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2213{
2214 struct ifnet *ifp = sc->sc_ifp;
2215 struct ether_header *eh;
2216 u_short etype;
2217
2218 eh = mtod(m, struct ether_header *);
2219 etype = ntohs(eh->ether_type);
2220
2221 /* Tap off LACP control messages */
2222 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
2223 m = lacp_input(lp, m);
2224 if (m == NULL)
2225 return (NULL);
2226 }
2227
2228 /*
2229 * If the port is not collecting or not in the active aggregator then
2230 * free and return.
2231 */
2232 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
2233 m_freem(m);
2234 return (NULL);
2235 }
2236
2237 m->m_pkthdr.rcvif = ifp;
2238 return (m);
2239}
2240
| 1264 error = EPROTONOSUPPORT;
1265 break;
1266 }
1267
1268 LAGG_WLOCK(sc);
1269 lagg_proto_detach(sc);
1270 LAGG_UNLOCK_ASSERT(sc);
1271 lagg_proto_attach(sc, ra->ra_proto);
1272 break;
1273 case SIOCGLAGGOPTS:
1274 ro->ro_opts = sc->sc_opts;
1275 if (sc->sc_proto == LAGG_PROTO_LACP) {
1276 struct lacp_softc *lsc;
1277
1278 lsc = (struct lacp_softc *)sc->sc_psc;
1279 if (lsc->lsc_debug.lsc_tx_test != 0)
1280 ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
1281 if (lsc->lsc_debug.lsc_rx_test != 0)
1282 ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
1283 if (lsc->lsc_strict_mode != 0)
1284 ro->ro_opts |= LAGG_OPT_LACP_STRICT;
1285 if (lsc->lsc_fast_timeout != 0)
1286 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT;
1287
1288 ro->ro_active = sc->sc_active;
1289 } else {
1290 ro->ro_active = 0;
1291 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1292 ro->ro_active += LAGG_PORTACTIVE(lp);
1293 }
1294 ro->ro_bkt = sc->sc_bkt;
1295 ro->ro_flapping = sc->sc_flapping;
1296 ro->ro_flowid_shift = sc->flowid_shift;
1297 break;
1298 case SIOCSLAGGOPTS:
1299 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) {
1300 if (ro->ro_bkt == 0)
1301 sc->sc_bkt = 1; // Minimum 1 packet per iface.
1302 else
1303 sc->sc_bkt = ro->ro_bkt;
1304 }
1305 error = priv_check(td, PRIV_NET_LAGG);
1306 if (error)
1307 break;
1308 if (ro->ro_opts == 0)
1309 break;
1310 /*
1311 * Set options. LACP options are stored in sc->sc_psc,
1312 * not in sc_opts.
1313 */
1314 int valid, lacp;
1315
1316 switch (ro->ro_opts) {
1317 case LAGG_OPT_USE_FLOWID:
1318 case -LAGG_OPT_USE_FLOWID:
1319 case LAGG_OPT_FLOWIDSHIFT:
1320 valid = 1;
1321 lacp = 0;
1322 break;
1323 case LAGG_OPT_LACP_TXTEST:
1324 case -LAGG_OPT_LACP_TXTEST:
1325 case LAGG_OPT_LACP_RXTEST:
1326 case -LAGG_OPT_LACP_RXTEST:
1327 case LAGG_OPT_LACP_STRICT:
1328 case -LAGG_OPT_LACP_STRICT:
1329 case LAGG_OPT_LACP_TIMEOUT:
1330 case -LAGG_OPT_LACP_TIMEOUT:
1331 valid = lacp = 1;
1332 break;
1333 default:
1334 valid = lacp = 0;
1335 break;
1336 }
1337
1338 LAGG_WLOCK(sc);
1339
1340 if (valid == 0 ||
1341 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
1342 /* Invalid combination of options specified. */
1343 error = EINVAL;
1344 LAGG_WUNLOCK(sc);
1345 break; /* Return from SIOCSLAGGOPTS. */
1346 }
1347 /*
1348 * Store new options into sc->sc_opts except for
1349 * FLOWIDSHIFT and LACP options.
1350 */
1351 if (lacp == 0) {
1352 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
1353 sc->flowid_shift = ro->ro_flowid_shift;
1354 else if (ro->ro_opts > 0)
1355 sc->sc_opts |= ro->ro_opts;
1356 else
1357 sc->sc_opts &= ~ro->ro_opts;
1358 } else {
1359 struct lacp_softc *lsc;
1360 struct lacp_port *lp;
1361
1362 lsc = (struct lacp_softc *)sc->sc_psc;
1363
1364 switch (ro->ro_opts) {
1365 case LAGG_OPT_LACP_TXTEST:
1366 lsc->lsc_debug.lsc_tx_test = 1;
1367 break;
1368 case -LAGG_OPT_LACP_TXTEST:
1369 lsc->lsc_debug.lsc_tx_test = 0;
1370 break;
1371 case LAGG_OPT_LACP_RXTEST:
1372 lsc->lsc_debug.lsc_rx_test = 1;
1373 break;
1374 case -LAGG_OPT_LACP_RXTEST:
1375 lsc->lsc_debug.lsc_rx_test = 0;
1376 break;
1377 case LAGG_OPT_LACP_STRICT:
1378 lsc->lsc_strict_mode = 1;
1379 break;
1380 case -LAGG_OPT_LACP_STRICT:
1381 lsc->lsc_strict_mode = 0;
1382 break;
1383 case LAGG_OPT_LACP_TIMEOUT:
1384 LACP_LOCK(lsc);
1385 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1386 lp->lp_state |= LACP_STATE_TIMEOUT;
1387 LACP_UNLOCK(lsc);
1388 lsc->lsc_fast_timeout = 1;
1389 break;
1390 case -LAGG_OPT_LACP_TIMEOUT:
1391 LACP_LOCK(lsc);
1392 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1393 lp->lp_state &= ~LACP_STATE_TIMEOUT;
1394 LACP_UNLOCK(lsc);
1395 lsc->lsc_fast_timeout = 0;
1396 break;
1397 }
1398 }
1399 LAGG_WUNLOCK(sc);
1400 break;
1401 case SIOCGLAGGFLAGS:
1402 rf->rf_flags = 0;
1403 LAGG_RLOCK(sc, &tracker);
1404 if (sc->sc_flags & MBUF_HASHFLAG_L2)
1405 rf->rf_flags |= LAGG_F_HASHL2;
1406 if (sc->sc_flags & MBUF_HASHFLAG_L3)
1407 rf->rf_flags |= LAGG_F_HASHL3;
1408 if (sc->sc_flags & MBUF_HASHFLAG_L4)
1409 rf->rf_flags |= LAGG_F_HASHL4;
1410 LAGG_RUNLOCK(sc, &tracker);
1411 break;
1412 case SIOCSLAGGHASH:
1413 error = priv_check(td, PRIV_NET_LAGG);
1414 if (error)
1415 break;
1416 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1417 error = EINVAL;
1418 break;
1419 }
1420 LAGG_WLOCK(sc);
1421 sc->sc_flags = 0;
1422 if (rf->rf_flags & LAGG_F_HASHL2)
1423 sc->sc_flags |= MBUF_HASHFLAG_L2;
1424 if (rf->rf_flags & LAGG_F_HASHL3)
1425 sc->sc_flags |= MBUF_HASHFLAG_L3;
1426 if (rf->rf_flags & LAGG_F_HASHL4)
1427 sc->sc_flags |= MBUF_HASHFLAG_L4;
1428 LAGG_WUNLOCK(sc);
1429 break;
1430 case SIOCGLAGGPORT:
1431 if (rp->rp_portname[0] == '\0' ||
1432 (tpif = ifunit(rp->rp_portname)) == NULL) {
1433 error = EINVAL;
1434 break;
1435 }
1436
1437 LAGG_RLOCK(sc, &tracker);
1438 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1439 lp->lp_softc != sc) {
1440 error = ENOENT;
1441 LAGG_RUNLOCK(sc, &tracker);
1442 break;
1443 }
1444
1445 lagg_port2req(lp, rp);
1446 LAGG_RUNLOCK(sc, &tracker);
1447 break;
1448 case SIOCSLAGGPORT:
1449 error = priv_check(td, PRIV_NET_LAGG);
1450 if (error)
1451 break;
1452 if (rp->rp_portname[0] == '\0' ||
1453 (tpif = ifunit(rp->rp_portname)) == NULL) {
1454 error = EINVAL;
1455 break;
1456 }
1457#ifdef INET6
1458 /*
1459 * A laggport interface should not have inet6 address
1460 * because two interfaces with a valid link-local
1461 * scope zone must not be merged in any form. This
1462 * restriction is needed to prevent violation of
1463 * link-local scope zone. Attempts to add a laggport
1464 * interface which has inet6 addresses triggers
1465 * removal of all inet6 addresses on the member
1466 * interface.
1467 */
1468 if (in6ifa_llaonifp(tpif)) {
1469 in6_ifdetach(tpif);
1470 if_printf(sc->sc_ifp,
1471 "IPv6 addresses on %s have been removed "
1472 "before adding it as a member to prevent "
1473 "IPv6 address scope violation.\n",
1474 tpif->if_xname);
1475 }
1476#endif
1477 LAGG_WLOCK(sc);
1478 error = lagg_port_create(sc, tpif);
1479 LAGG_WUNLOCK(sc);
1480 break;
1481 case SIOCSLAGGDELPORT:
1482 error = priv_check(td, PRIV_NET_LAGG);
1483 if (error)
1484 break;
1485 if (rp->rp_portname[0] == '\0' ||
1486 (tpif = ifunit(rp->rp_portname)) == NULL) {
1487 error = EINVAL;
1488 break;
1489 }
1490
1491 LAGG_WLOCK(sc);
1492 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1493 lp->lp_softc != sc) {
1494 error = ENOENT;
1495 LAGG_WUNLOCK(sc);
1496 break;
1497 }
1498
1499 error = lagg_port_destroy(lp, 1);
1500 LAGG_WUNLOCK(sc);
1501 break;
1502 case SIOCSIFFLAGS:
1503 /* Set flags on ports too */
1504 LAGG_WLOCK(sc);
1505 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1506 lagg_setflags(lp, 1);
1507 }
1508 LAGG_WUNLOCK(sc);
1509
1510 if (!(ifp->if_flags & IFF_UP) &&
1511 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1512 /*
1513 * If interface is marked down and it is running,
1514 * then stop and disable it.
1515 */
1516 LAGG_WLOCK(sc);
1517 lagg_stop(sc);
1518 LAGG_WUNLOCK(sc);
1519 } else if ((ifp->if_flags & IFF_UP) &&
1520 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1521 /*
1522 * If interface is marked up and it is stopped, then
1523 * start it.
1524 */
1525 (*ifp->if_init)(sc);
1526 }
1527 break;
1528 case SIOCADDMULTI:
1529 case SIOCDELMULTI:
1530 LAGG_WLOCK(sc);
1531 error = lagg_ether_setmulti(sc);
1532 LAGG_WUNLOCK(sc);
1533 break;
1534 case SIOCSIFMEDIA:
1535 case SIOCGIFMEDIA:
1536 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1537 break;
1538
1539 case SIOCSIFCAP:
1540 case SIOCSIFMTU:
1541 /* Do not allow the MTU or caps to be directly changed */
1542 error = EINVAL;
1543 break;
1544
1545 default:
1546 error = ether_ioctl(ifp, cmd, data);
1547 break;
1548 }
1549 return (error);
1550}
1551
1552static int
1553lagg_ether_setmulti(struct lagg_softc *sc)
1554{
1555 struct lagg_port *lp;
1556
1557 LAGG_WLOCK_ASSERT(sc);
1558
1559 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1560 /* First, remove any existing filter entries. */
1561 lagg_ether_cmdmulti(lp, 0);
1562 /* copy all addresses from the lagg interface to the port */
1563 lagg_ether_cmdmulti(lp, 1);
1564 }
1565 return (0);
1566}
1567
1568static int
1569lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1570{
1571 struct lagg_softc *sc = lp->lp_softc;
1572 struct ifnet *ifp = lp->lp_ifp;
1573 struct ifnet *scifp = sc->sc_ifp;
1574 struct lagg_mc *mc;
1575 struct ifmultiaddr *ifma;
1576 int error;
1577
1578 LAGG_WLOCK_ASSERT(sc);
1579
1580 if (set) {
1581 IF_ADDR_WLOCK(scifp);
1582 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1583 if (ifma->ifma_addr->sa_family != AF_LINK)
1584 continue;
1585 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1586 if (mc == NULL) {
1587 IF_ADDR_WUNLOCK(scifp);
1588 return (ENOMEM);
1589 }
1590 bcopy(ifma->ifma_addr, &mc->mc_addr,
1591 ifma->ifma_addr->sa_len);
1592 mc->mc_addr.sdl_index = ifp->if_index;
1593 mc->mc_ifma = NULL;
1594 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1595 }
1596 IF_ADDR_WUNLOCK(scifp);
1597 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
1598 error = if_addmulti(ifp,
1599 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
1600 if (error)
1601 return (error);
1602 }
1603 } else {
1604 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1605 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1606 if (mc->mc_ifma && !lp->lp_detaching)
1607 if_delmulti_ifma(mc->mc_ifma);
1608 free(mc, M_DEVBUF);
1609 }
1610 }
1611 return (0);
1612}
1613
1614/* Handle a ref counted flag that should be set on the lagg port as well */
1615static int
1616lagg_setflag(struct lagg_port *lp, int flag, int status,
1617 int (*func)(struct ifnet *, int))
1618{
1619 struct lagg_softc *sc = lp->lp_softc;
1620 struct ifnet *scifp = sc->sc_ifp;
1621 struct ifnet *ifp = lp->lp_ifp;
1622 int error;
1623
1624 LAGG_WLOCK_ASSERT(sc);
1625
1626 status = status ? (scifp->if_flags & flag) : 0;
1627 /* Now "status" contains the flag value or 0 */
1628
1629 /*
1630 * See if recorded ports status is different from what
1631 * we want it to be. If it is, flip it. We record ports
1632 * status in lp_ifflags so that we won't clear ports flag
1633 * we haven't set. In fact, we don't clear or set ports
1634 * flags directly, but get or release references to them.
1635 * That's why we can be sure that recorded flags still are
1636 * in accord with actual ports flags.
1637 */
1638 if (status != (lp->lp_ifflags & flag)) {
1639 error = (*func)(ifp, status);
1640 if (error)
1641 return (error);
1642 lp->lp_ifflags &= ~flag;
1643 lp->lp_ifflags |= status;
1644 }
1645 return (0);
1646}
1647
1648/*
1649 * Handle IFF_* flags that require certain changes on the lagg port
1650 * if "status" is true, update ports flags respective to the lagg
1651 * if "status" is false, forcedly clear the flags set on port.
1652 */
1653static int
1654lagg_setflags(struct lagg_port *lp, int status)
1655{
1656 int error, i;
1657
1658 for (i = 0; lagg_pflags[i].flag; i++) {
1659 error = lagg_setflag(lp, lagg_pflags[i].flag,
1660 status, lagg_pflags[i].func);
1661 if (error)
1662 return (error);
1663 }
1664 return (0);
1665}
1666
1667static int
1668lagg_transmit(struct ifnet *ifp, struct mbuf *m)
1669{
1670 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1671 int error, len, mcast;
1672 struct rm_priotracker tracker;
1673
1674 len = m->m_pkthdr.len;
1675 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
1676
1677 LAGG_RLOCK(sc, &tracker);
1678 /* We need a Tx algorithm and at least one port */
1679 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
1680 LAGG_RUNLOCK(sc, &tracker);
1681 m_freem(m);
1682 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1683 return (ENXIO);
1684 }
1685
1686 ETHER_BPF_MTAP(ifp, m);
1687
1688 error = lagg_proto_start(sc, m);
1689 LAGG_RUNLOCK(sc, &tracker);
1690
1691 if (error != 0)
1692 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1693
1694 return (error);
1695}
1696
1697/*
1698 * The ifp->if_qflush entry point for lagg(4) is no-op.
1699 */
1700static void
1701lagg_qflush(struct ifnet *ifp __unused)
1702{
1703}
1704
1705static struct mbuf *
1706lagg_input(struct ifnet *ifp, struct mbuf *m)
1707{
1708 struct lagg_port *lp = ifp->if_lagg;
1709 struct lagg_softc *sc = lp->lp_softc;
1710 struct ifnet *scifp = sc->sc_ifp;
1711 struct rm_priotracker tracker;
1712
1713 LAGG_RLOCK(sc, &tracker);
1714 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1715 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1716 sc->sc_proto == LAGG_PROTO_NONE) {
1717 LAGG_RUNLOCK(sc, &tracker);
1718 m_freem(m);
1719 return (NULL);
1720 }
1721
1722 ETHER_BPF_MTAP(scifp, m);
1723
1724 if (lp->lp_detaching != 0) {
1725 m_freem(m);
1726 m = NULL;
1727 } else
1728 m = lagg_proto_input(sc, lp, m);
1729
1730 if (m != NULL) {
1731 if (scifp->if_flags & IFF_MONITOR) {
1732 m_freem(m);
1733 m = NULL;
1734 }
1735 }
1736
1737 LAGG_RUNLOCK(sc, &tracker);
1738 return (m);
1739}
1740
1741static int
1742lagg_media_change(struct ifnet *ifp)
1743{
1744 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1745
1746 if (sc->sc_ifflags & IFF_DEBUG)
1747 printf("%s\n", __func__);
1748
1749 /* Ignore */
1750 return (0);
1751}
1752
1753static void
1754lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1755{
1756 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1757 struct lagg_port *lp;
1758 struct rm_priotracker tracker;
1759
1760 imr->ifm_status = IFM_AVALID;
1761 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1762
1763 LAGG_RLOCK(sc, &tracker);
1764 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1765 if (LAGG_PORTACTIVE(lp))
1766 imr->ifm_status |= IFM_ACTIVE;
1767 }
1768 LAGG_RUNLOCK(sc, &tracker);
1769}
1770
1771static void
1772lagg_linkstate(struct lagg_softc *sc)
1773{
1774 struct lagg_port *lp;
1775 int new_link = LINK_STATE_DOWN;
1776 uint64_t speed;
1777
1778 /* Our link is considered up if at least one of our ports is active */
1779 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1780 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) {
1781 new_link = LINK_STATE_UP;
1782 break;
1783 }
1784 }
1785 if_link_state_change(sc->sc_ifp, new_link);
1786
1787 /* Update if_baudrate to reflect the max possible speed */
1788 switch (sc->sc_proto) {
1789 case LAGG_PROTO_FAILOVER:
1790 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
1791 sc->sc_primary->lp_ifp->if_baudrate : 0;
1792 break;
1793 case LAGG_PROTO_ROUNDROBIN:
1794 case LAGG_PROTO_LOADBALANCE:
1795 case LAGG_PROTO_BROADCAST:
1796 speed = 0;
1797 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1798 speed += lp->lp_ifp->if_baudrate;
1799 sc->sc_ifp->if_baudrate = speed;
1800 break;
1801 case LAGG_PROTO_LACP:
1802 /* LACP updates if_baudrate itself */
1803 break;
1804 }
1805}
1806
1807static void
1808lagg_port_state(struct ifnet *ifp, int state)
1809{
1810 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1811 struct lagg_softc *sc = NULL;
1812
1813 if (lp != NULL)
1814 sc = lp->lp_softc;
1815 if (sc == NULL)
1816 return;
1817
1818 LAGG_WLOCK(sc);
1819 lagg_linkstate(sc);
1820 lagg_proto_linkstate(sc, lp);
1821 LAGG_WUNLOCK(sc);
1822}
1823
1824struct lagg_port *
1825lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1826{
1827 struct lagg_port *lp_next, *rval = NULL;
1828 // int new_link = LINK_STATE_DOWN;
1829
1830 LAGG_RLOCK_ASSERT(sc);
1831 /*
1832 * Search a port which reports an active link state.
1833 */
1834
1835 if (lp == NULL)
1836 goto search;
1837 if (LAGG_PORTACTIVE(lp)) {
1838 rval = lp;
1839 goto found;
1840 }
1841 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1842 LAGG_PORTACTIVE(lp_next)) {
1843 rval = lp_next;
1844 goto found;
1845 }
1846
1847search:
1848 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1849 if (LAGG_PORTACTIVE(lp_next)) {
1850 rval = lp_next;
1851 goto found;
1852 }
1853 }
1854
1855found:
1856 if (rval != NULL) {
1857 /*
1858 * The IEEE 802.1D standard assumes that a lagg with
1859 * multiple ports is always full duplex. This is valid
1860 * for load sharing laggs and if at least two links
1861 * are active. Unfortunately, checking the latter would
1862 * be too expensive at this point.
1863 XXX
1864 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1865 (sc->sc_count > 1))
1866 new_link = LINK_STATE_FULL_DUPLEX;
1867 else
1868 new_link = rval->lp_link_state;
1869 */
1870 }
1871
1872 return (rval);
1873}
1874
1875int
1876lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1877{
1878
1879 return (ifp->if_transmit)(ifp, m);
1880}
1881
1882/*
1883 * Simple round robin aggregation
1884 */
1885static void
1886lagg_rr_attach(struct lagg_softc *sc)
1887{
1888 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1889 sc->sc_seq = 0;
1890 sc->sc_bkt_count = sc->sc_bkt;
1891}
1892
1893static int
1894lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1895{
1896 struct lagg_port *lp;
1897 uint32_t p;
1898
1899 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0)
1900 sc->sc_bkt_count = sc->sc_bkt;
1901
1902 if (sc->sc_bkt > 0) {
1903 atomic_subtract_int(&sc->sc_bkt_count, 1);
1904 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt))
1905 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1906 else
1907 p = sc->sc_seq;
1908 } else
1909 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1910
1911 p %= sc->sc_count;
1912 lp = SLIST_FIRST(&sc->sc_ports);
1913
1914 while (p--)
1915 lp = SLIST_NEXT(lp, lp_entries);
1916
1917 /*
1918 * Check the port's link state. This will return the next active
1919 * port if the link is down or the port is NULL.
1920 */
1921 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1922 m_freem(m);
1923 return (ENETDOWN);
1924 }
1925
1926 /* Send mbuf */
1927 return (lagg_enqueue(lp->lp_ifp, m));
1928}
1929
1930static struct mbuf *
1931lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1932{
1933 struct ifnet *ifp = sc->sc_ifp;
1934
1935 /* Just pass in the packet to our lagg device */
1936 m->m_pkthdr.rcvif = ifp;
1937
1938 return (m);
1939}
1940
1941/*
1942 * Broadcast mode
1943 */
1944static int
1945lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m)
1946{
1947 int active_ports = 0;
1948 int errors = 0;
1949 int ret;
1950 struct lagg_port *lp, *last = NULL;
1951 struct mbuf *m0;
1952
1953 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1954 if (!LAGG_PORTACTIVE(lp))
1955 continue;
1956
1957 active_ports++;
1958
1959 if (last != NULL) {
1960 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT);
1961 if (m0 == NULL) {
1962 ret = ENOBUFS;
1963 errors++;
1964 break;
1965 }
1966
1967 ret = lagg_enqueue(last->lp_ifp, m0);
1968 if (ret != 0)
1969 errors++;
1970 }
1971 last = lp;
1972 }
1973 if (last == NULL) {
1974 m_freem(m);
1975 return (ENOENT);
1976 }
1977 if ((last = lagg_link_active(sc, last)) == NULL) {
1978 m_freem(m);
1979 return (ENETDOWN);
1980 }
1981
1982 ret = lagg_enqueue(last->lp_ifp, m);
1983 if (ret != 0)
1984 errors++;
1985
1986 if (errors == 0)
1987 return (ret);
1988
1989 return (0);
1990}
1991
1992static struct mbuf*
1993lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1994{
1995 struct ifnet *ifp = sc->sc_ifp;
1996
1997 /* Just pass in the packet to our lagg device */
1998 m->m_pkthdr.rcvif = ifp;
1999 return (m);
2000}
2001
2002/*
2003 * Active failover
2004 */
2005static int
2006lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
2007{
2008 struct lagg_port *lp;
2009
2010 /* Use the master port if active or the next available port */
2011 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
2012 m_freem(m);
2013 return (ENETDOWN);
2014 }
2015
2016 /* Send mbuf */
2017 return (lagg_enqueue(lp->lp_ifp, m));
2018}
2019
2020static struct mbuf *
2021lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2022{
2023 struct ifnet *ifp = sc->sc_ifp;
2024 struct lagg_port *tmp_tp;
2025
2026 if (lp == sc->sc_primary || V_lagg_failover_rx_all) {
2027 m->m_pkthdr.rcvif = ifp;
2028 return (m);
2029 }
2030
2031 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
2032 tmp_tp = lagg_link_active(sc, sc->sc_primary);
2033 /*
2034 * If tmp_tp is null, we've recieved a packet when all
2035 * our links are down. Weird, but process it anyways.
2036 */
2037 if ((tmp_tp == NULL || tmp_tp == lp)) {
2038 m->m_pkthdr.rcvif = ifp;
2039 return (m);
2040 }
2041 }
2042
2043 m_freem(m);
2044 return (NULL);
2045}
2046
2047/*
2048 * Loadbalancing
2049 */
2050static void
2051lagg_lb_attach(struct lagg_softc *sc)
2052{
2053 struct lagg_port *lp;
2054 struct lagg_lb *lb;
2055
2056 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO);
2057
2058 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
2059
2060 lb->lb_key = m_ether_tcpip_hash_init();
2061 sc->sc_psc = lb;
2062
2063 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2064 lagg_lb_port_create(lp);
2065}
2066
2067static void
2068lagg_lb_detach(struct lagg_softc *sc)
2069{
2070 struct lagg_lb *lb;
2071
2072 lb = (struct lagg_lb *)sc->sc_psc;
2073 LAGG_WUNLOCK(sc);
2074 if (lb != NULL)
2075 free(lb, M_DEVBUF);
2076}
2077
2078static int
2079lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
2080{
2081 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2082 struct lagg_port *lp_next;
2083 int i = 0;
2084
2085 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
2086 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2087 if (lp_next == lp)
2088 continue;
2089 if (i >= LAGG_MAX_PORTS)
2090 return (EINVAL);
2091 if (sc->sc_ifflags & IFF_DEBUG)
2092 printf("%s: port %s at index %d\n",
2093 sc->sc_ifname, lp_next->lp_ifp->if_xname, i);
2094 lb->lb_ports[i++] = lp_next;
2095 }
2096
2097 return (0);
2098}
2099
2100static int
2101lagg_lb_port_create(struct lagg_port *lp)
2102{
2103 struct lagg_softc *sc = lp->lp_softc;
2104 return (lagg_lb_porttable(sc, NULL));
2105}
2106
2107static void
2108lagg_lb_port_destroy(struct lagg_port *lp)
2109{
2110 struct lagg_softc *sc = lp->lp_softc;
2111 lagg_lb_porttable(sc, lp);
2112}
2113
2114static int
2115lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
2116{
2117 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2118 struct lagg_port *lp = NULL;
2119 uint32_t p = 0;
2120
2121 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
2122 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
2123 p = m->m_pkthdr.flowid >> sc->flowid_shift;
2124 else
2125 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key);
2126 p %= sc->sc_count;
2127 lp = lb->lb_ports[p];
2128
2129 /*
2130 * Check the port's link state. This will return the next active
2131 * port if the link is down or the port is NULL.
2132 */
2133 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2134 m_freem(m);
2135 return (ENETDOWN);
2136 }
2137
2138 /* Send mbuf */
2139 return (lagg_enqueue(lp->lp_ifp, m));
2140}
2141
2142static struct mbuf *
2143lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2144{
2145 struct ifnet *ifp = sc->sc_ifp;
2146
2147 /* Just pass in the packet to our lagg device */
2148 m->m_pkthdr.rcvif = ifp;
2149
2150 return (m);
2151}
2152
2153/*
2154 * 802.3ad LACP
2155 */
2156static void
2157lagg_lacp_attach(struct lagg_softc *sc)
2158{
2159 struct lagg_port *lp;
2160
2161 lacp_attach(sc);
2162 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2163 lacp_port_create(lp);
2164}
2165
2166static void
2167lagg_lacp_detach(struct lagg_softc *sc)
2168{
2169 struct lagg_port *lp;
2170 void *psc;
2171
2172 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2173 lacp_port_destroy(lp);
2174
2175 psc = sc->sc_psc;
2176 sc->sc_psc = NULL;
2177 LAGG_WUNLOCK(sc);
2178
2179 lacp_detach(psc);
2180}
2181
2182static void
2183lagg_lacp_lladdr(struct lagg_softc *sc)
2184{
2185 struct lagg_port *lp;
2186
2187 /* purge all the lacp ports */
2188 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2189 lacp_port_destroy(lp);
2190
2191 /* add them back in */
2192 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2193 lacp_port_create(lp);
2194}
2195
2196static int
2197lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
2198{
2199 struct lagg_port *lp;
2200
2201 lp = lacp_select_tx_port(sc, m);
2202 if (lp == NULL) {
2203 m_freem(m);
2204 return (ENETDOWN);
2205 }
2206
2207 /* Send mbuf */
2208 return (lagg_enqueue(lp->lp_ifp, m));
2209}
2210
2211static struct mbuf *
2212lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2213{
2214 struct ifnet *ifp = sc->sc_ifp;
2215 struct ether_header *eh;
2216 u_short etype;
2217
2218 eh = mtod(m, struct ether_header *);
2219 etype = ntohs(eh->ether_type);
2220
2221 /* Tap off LACP control messages */
2222 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
2223 m = lacp_input(lp, m);
2224 if (m == NULL)
2225 return (NULL);
2226 }
2227
2228 /*
2229 * If the port is not collecting or not in the active aggregator then
2230 * free and return.
2231 */
2232 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
2233 m_freem(m);
2234 return (NULL);
2235 }
2236
2237 m->m_pkthdr.rcvif = ifp;
2238 return (m);
2239}
2240
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