FreeBSD/Linux Kernel Cross Reference
sys/net/if_lagg.c
1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
2
3 /*
4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/cdefs.h>
21 __FBSDID("$FreeBSD: releng/10.1/sys/net/if_lagg.c 270136 2014-08-18 15:54:35Z mav $");
22
23 #include "opt_inet.h"
24 #include "opt_inet6.h"
25
26 #include <sys/param.h>
27 #include <sys/kernel.h>
28 #include <sys/malloc.h>
29 #include <sys/mbuf.h>
30 #include <sys/queue.h>
31 #include <sys/socket.h>
32 #include <sys/sockio.h>
33 #include <sys/sysctl.h>
34 #include <sys/module.h>
35 #include <sys/priv.h>
36 #include <sys/systm.h>
37 #include <sys/proc.h>
38 #include <sys/hash.h>
39 #include <sys/lock.h>
40 #include <sys/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_llc.h>
50 #include <net/if_media.h>
51 #include <net/if_types.h>
52 #include <net/if_var.h>
53 #include <net/bpf.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. */
75 static 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
84 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */
85 static struct mtx lagg_list_mtx;
86 eventhandler_tag lagg_detach_cookie = NULL;
87
88 static int lagg_clone_create(struct if_clone *, int, caddr_t);
89 static void lagg_clone_destroy(struct ifnet *);
90 static struct if_clone *lagg_cloner;
91 static const char laggname[] = "lagg";
92
93 static void lagg_lladdr(struct lagg_softc *, uint8_t *);
94 static void lagg_capabilities(struct lagg_softc *);
95 static void lagg_port_lladdr(struct lagg_port *, uint8_t *);
96 static void lagg_port_setlladdr(void *, int);
97 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
98 static int lagg_port_destroy(struct lagg_port *, int);
99 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
100 static void lagg_linkstate(struct lagg_softc *);
101 static void lagg_port_state(struct ifnet *, int);
102 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
103 static int lagg_port_output(struct ifnet *, struct mbuf *,
104 const struct sockaddr *, struct route *);
105 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
106 #ifdef LAGG_PORT_STACKING
107 static int lagg_port_checkstacking(struct lagg_softc *);
108 #endif
109 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
110 static void lagg_init(void *);
111 static void lagg_stop(struct lagg_softc *);
112 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
113 static int lagg_ether_setmulti(struct lagg_softc *);
114 static int lagg_ether_cmdmulti(struct lagg_port *, int);
115 static int lagg_setflag(struct lagg_port *, int, int,
116 int (*func)(struct ifnet *, int));
117 static int lagg_setflags(struct lagg_port *, int status);
118 static int lagg_transmit(struct ifnet *, struct mbuf *);
119 static void lagg_qflush(struct ifnet *);
120 static int lagg_media_change(struct ifnet *);
121 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
122 static struct lagg_port *lagg_link_active(struct lagg_softc *,
123 struct lagg_port *);
124 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *);
125 static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS);
126
127 /* Simple round robin */
128 static int lagg_rr_attach(struct lagg_softc *);
129 static int lagg_rr_detach(struct lagg_softc *);
130 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
131 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
132 struct mbuf *);
133
134 /* Active failover */
135 static int lagg_fail_attach(struct lagg_softc *);
136 static int lagg_fail_detach(struct lagg_softc *);
137 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
138 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
139 struct mbuf *);
140
141 /* Loadbalancing */
142 static int lagg_lb_attach(struct lagg_softc *);
143 static int lagg_lb_detach(struct lagg_softc *);
144 static int lagg_lb_port_create(struct lagg_port *);
145 static void lagg_lb_port_destroy(struct lagg_port *);
146 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
147 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
148 struct mbuf *);
149 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
150
151 /* 802.3ad LACP */
152 static int lagg_lacp_attach(struct lagg_softc *);
153 static int lagg_lacp_detach(struct lagg_softc *);
154 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
155 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
156 struct mbuf *);
157 static void lagg_lacp_lladdr(struct lagg_softc *);
158
159 static void lagg_callout(void *);
160
161 /* lagg protocol table */
162 static const struct {
163 int ti_proto;
164 int (*ti_attach)(struct lagg_softc *);
165 } lagg_protos[] = {
166 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach },
167 { LAGG_PROTO_FAILOVER, lagg_fail_attach },
168 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach },
169 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach },
170 { LAGG_PROTO_LACP, lagg_lacp_attach },
171 { LAGG_PROTO_NONE, NULL }
172 };
173
174 SYSCTL_DECL(_net_link);
175 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
176 "Link Aggregation");
177
178 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */
179 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW,
180 &lagg_failover_rx_all, 0,
181 "Accept input from any interface in a failover lagg");
182 static int def_use_flowid = 1; /* Default value for using M_FLOWID */
183 TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid);
184 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW,
185 &def_use_flowid, 0,
186 "Default setting for using flow id for load sharing");
187 static int def_flowid_shift = 16; /* Default value for using M_FLOWID */
188 TUNABLE_INT("net.link.lagg.default_flowid_shift", &def_flowid_shift);
189 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RW,
190 &def_flowid_shift, 0,
191 "Default setting for flowid shift for load sharing");
192
193 static int
194 lagg_modevent(module_t mod, int type, void *data)
195 {
196
197 switch (type) {
198 case MOD_LOAD:
199 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF);
200 SLIST_INIT(&lagg_list);
201 lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
202 lagg_clone_destroy, 0);
203 lagg_input_p = lagg_input;
204 lagg_linkstate_p = lagg_port_state;
205 lagg_detach_cookie = EVENTHANDLER_REGISTER(
206 ifnet_departure_event, lagg_port_ifdetach, NULL,
207 EVENTHANDLER_PRI_ANY);
208 break;
209 case MOD_UNLOAD:
210 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
211 lagg_detach_cookie);
212 if_clone_detach(lagg_cloner);
213 lagg_input_p = NULL;
214 lagg_linkstate_p = NULL;
215 mtx_destroy(&lagg_list_mtx);
216 break;
217 default:
218 return (EOPNOTSUPP);
219 }
220 return (0);
221 }
222
223 static moduledata_t lagg_mod = {
224 "if_lagg",
225 lagg_modevent,
226 0
227 };
228
229 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
230 MODULE_VERSION(if_lagg, 1);
231
232 /*
233 * This routine is run via an vlan
234 * config EVENT
235 */
236 static void
237 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
238 {
239 struct lagg_softc *sc = ifp->if_softc;
240 struct lagg_port *lp;
241 struct rm_priotracker tracker;
242
243 if (ifp->if_softc != arg) /* Not our event */
244 return;
245
246 LAGG_RLOCK(sc, &tracker);
247 if (!SLIST_EMPTY(&sc->sc_ports)) {
248 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
249 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
250 }
251 LAGG_RUNLOCK(sc, &tracker);
252 }
253
254 /*
255 * This routine is run via an vlan
256 * unconfig EVENT
257 */
258 static void
259 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
260 {
261 struct lagg_softc *sc = ifp->if_softc;
262 struct lagg_port *lp;
263 struct rm_priotracker tracker;
264
265 if (ifp->if_softc != arg) /* Not our event */
266 return;
267
268 LAGG_RLOCK(sc, &tracker);
269 if (!SLIST_EMPTY(&sc->sc_ports)) {
270 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
271 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
272 }
273 LAGG_RUNLOCK(sc, &tracker);
274 }
275
276 static int
277 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
278 {
279 struct lagg_softc *sc;
280 struct ifnet *ifp;
281 int i, error = 0;
282 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
283 struct sysctl_oid *oid;
284 char num[14]; /* sufficient for 32 bits */
285
286 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
287 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
288 if (ifp == NULL) {
289 free(sc, M_DEVBUF);
290 return (ENOSPC);
291 }
292
293 sc->sc_ipackets = counter_u64_alloc(M_WAITOK);
294 sc->sc_opackets = counter_u64_alloc(M_WAITOK);
295 sc->sc_ibytes = counter_u64_alloc(M_WAITOK);
296 sc->sc_obytes = counter_u64_alloc(M_WAITOK);
297
298 sysctl_ctx_init(&sc->ctx);
299 snprintf(num, sizeof(num), "%u", unit);
300 sc->use_flowid = def_use_flowid;
301 sc->flowid_shift = def_flowid_shift;
302 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx,
303 &SYSCTL_NODE_CHILDREN(_net_link, lagg),
304 OID_AUTO, num, CTLFLAG_RD, NULL, "");
305 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
306 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid,
307 sc->use_flowid, "Use flow id for load sharing");
308 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
309 "flowid_shift", CTLTYPE_INT|CTLFLAG_RW, &sc->flowid_shift,
310 sc->flowid_shift,
311 "Shift flowid bits to prevent multiqueue collisions");
312 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
313 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count,
314 "Total number of ports");
315 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
316 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active,
317 "I", "Total number of active ports");
318 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
319 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping,
320 sc->sc_flapping, "Total number of port change events");
321 /* Hash all layers by default */
322 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4;
323
324 sc->sc_proto = LAGG_PROTO_NONE;
325 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) {
326 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) {
327 sc->sc_proto = lagg_protos[i].ti_proto;
328 if ((error = lagg_protos[i].ti_attach(sc)) != 0) {
329 if_free(ifp);
330 free(sc, M_DEVBUF);
331 return (error);
332 }
333 break;
334 }
335 }
336 LAGG_LOCK_INIT(sc);
337 LAGG_CALLOUT_LOCK_INIT(sc);
338 SLIST_INIT(&sc->sc_ports);
339 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
340
341 /*
342 * This uses the callout lock rather than the rmlock; one can't
343 * hold said rmlock during SWI.
344 */
345 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0);
346
347 /* Initialise pseudo media types */
348 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
349 lagg_media_status);
350 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
351 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
352
353 if_initname(ifp, laggname, unit);
354 ifp->if_softc = sc;
355 ifp->if_transmit = lagg_transmit;
356 ifp->if_qflush = lagg_qflush;
357 ifp->if_init = lagg_init;
358 ifp->if_ioctl = lagg_ioctl;
359 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
360 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
361
362 /*
363 * Attach as an ordinary ethernet device, children will be attached
364 * as special device IFT_IEEE8023ADLAG.
365 */
366 ether_ifattach(ifp, eaddr);
367
368 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
369 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
370 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
371 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
372
373 /* Insert into the global list of laggs */
374 mtx_lock(&lagg_list_mtx);
375 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries);
376 mtx_unlock(&lagg_list_mtx);
377
378 callout_reset(&sc->sc_callout, hz, lagg_callout, sc);
379
380 return (0);
381 }
382
383 static void
384 lagg_clone_destroy(struct ifnet *ifp)
385 {
386 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
387 struct lagg_port *lp;
388
389 LAGG_WLOCK(sc);
390
391 lagg_stop(sc);
392 ifp->if_flags &= ~IFF_UP;
393
394 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
395 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
396
397 /* Shutdown and remove lagg ports */
398 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
399 lagg_port_destroy(lp, 1);
400 /* Unhook the aggregation protocol */
401 if (sc->sc_detach != NULL)
402 (*sc->sc_detach)(sc);
403
404 LAGG_WUNLOCK(sc);
405
406 sysctl_ctx_free(&sc->ctx);
407 ifmedia_removeall(&sc->sc_media);
408 ether_ifdetach(ifp);
409 if_free(ifp);
410
411 /* This grabs sc_callout_mtx, serialising it correctly */
412 callout_drain(&sc->sc_callout);
413
414 /* At this point it's drained; we can free this */
415 counter_u64_free(sc->sc_ipackets);
416 counter_u64_free(sc->sc_opackets);
417 counter_u64_free(sc->sc_ibytes);
418 counter_u64_free(sc->sc_obytes);
419
420 mtx_lock(&lagg_list_mtx);
421 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries);
422 mtx_unlock(&lagg_list_mtx);
423
424 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
425 LAGG_LOCK_DESTROY(sc);
426 LAGG_CALLOUT_LOCK_DESTROY(sc);
427 free(sc, M_DEVBUF);
428 }
429
430 static void
431 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
432 {
433 struct ifnet *ifp = sc->sc_ifp;
434
435 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
436 return;
437
438 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
439 /* Let the protocol know the MAC has changed */
440 if (sc->sc_lladdr != NULL)
441 (*sc->sc_lladdr)(sc);
442 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
443 }
444
445 static void
446 lagg_capabilities(struct lagg_softc *sc)
447 {
448 struct lagg_port *lp;
449 int cap = ~0, ena = ~0;
450 u_long hwa = ~0UL;
451 #if defined(INET) || defined(INET6)
452 u_int hw_tsomax = IP_MAXPACKET; /* Initialize to the maximum value. */
453 #else
454 u_int hw_tsomax = ~0; /* if_hw_tsomax is only for INET/INET6, but.. */
455 #endif
456
457 LAGG_WLOCK_ASSERT(sc);
458
459 /* Get capabilities from the lagg ports */
460 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
461 cap &= lp->lp_ifp->if_capabilities;
462 ena &= lp->lp_ifp->if_capenable;
463 hwa &= lp->lp_ifp->if_hwassist;
464 /* Set to the minimum value of the lagg ports. */
465 if (lp->lp_ifp->if_hw_tsomax < hw_tsomax &&
466 lp->lp_ifp->if_hw_tsomax > 0)
467 hw_tsomax = lp->lp_ifp->if_hw_tsomax;
468 }
469 cap = (cap == ~0 ? 0 : cap);
470 ena = (ena == ~0 ? 0 : ena);
471 hwa = (hwa == ~0 ? 0 : hwa);
472
473 if (sc->sc_ifp->if_capabilities != cap ||
474 sc->sc_ifp->if_capenable != ena ||
475 sc->sc_ifp->if_hwassist != hwa ||
476 sc->sc_ifp->if_hw_tsomax != hw_tsomax) {
477 sc->sc_ifp->if_capabilities = cap;
478 sc->sc_ifp->if_capenable = ena;
479 sc->sc_ifp->if_hwassist = hwa;
480 sc->sc_ifp->if_hw_tsomax = hw_tsomax;
481 getmicrotime(&sc->sc_ifp->if_lastchange);
482
483 if (sc->sc_ifflags & IFF_DEBUG)
484 if_printf(sc->sc_ifp,
485 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
486 }
487 }
488
489 static void
490 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr)
491 {
492 struct lagg_softc *sc = lp->lp_softc;
493 struct ifnet *ifp = lp->lp_ifp;
494 struct lagg_llq *llq;
495 int pending = 0;
496
497 LAGG_WLOCK_ASSERT(sc);
498
499 if (lp->lp_detaching ||
500 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
501 return;
502
503 /* Check to make sure its not already queued to be changed */
504 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
505 if (llq->llq_ifp == ifp) {
506 pending = 1;
507 break;
508 }
509 }
510
511 if (!pending) {
512 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT);
513 if (llq == NULL) /* XXX what to do */
514 return;
515 }
516
517 /* Update the lladdr even if pending, it may have changed */
518 llq->llq_ifp = ifp;
519 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
520
521 if (!pending)
522 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
523
524 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
525 }
526
527 /*
528 * Set the interface MAC address from a taskqueue to avoid a LOR.
529 */
530 static void
531 lagg_port_setlladdr(void *arg, int pending)
532 {
533 struct lagg_softc *sc = (struct lagg_softc *)arg;
534 struct lagg_llq *llq, *head;
535 struct ifnet *ifp;
536 int error;
537
538 /* Grab a local reference of the queue and remove it from the softc */
539 LAGG_WLOCK(sc);
540 head = SLIST_FIRST(&sc->sc_llq_head);
541 SLIST_FIRST(&sc->sc_llq_head) = NULL;
542 LAGG_WUNLOCK(sc);
543
544 /*
545 * Traverse the queue and set the lladdr on each ifp. It is safe to do
546 * unlocked as we have the only reference to it.
547 */
548 for (llq = head; llq != NULL; llq = head) {
549 ifp = llq->llq_ifp;
550
551 /* Set the link layer address */
552 CURVNET_SET(ifp->if_vnet);
553 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN);
554 CURVNET_RESTORE();
555 if (error)
556 printf("%s: setlladdr failed on %s\n", __func__,
557 ifp->if_xname);
558
559 head = SLIST_NEXT(llq, llq_entries);
560 free(llq, M_DEVBUF);
561 }
562 }
563
564 static int
565 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
566 {
567 struct lagg_softc *sc_ptr;
568 struct lagg_port *lp;
569 int error = 0;
570
571 LAGG_WLOCK_ASSERT(sc);
572
573 /* Limit the maximal number of lagg ports */
574 if (sc->sc_count >= LAGG_MAX_PORTS)
575 return (ENOSPC);
576
577 /* Check if port has already been associated to a lagg */
578 if (ifp->if_lagg != NULL) {
579 /* Port is already in the current lagg? */
580 lp = (struct lagg_port *)ifp->if_lagg;
581 if (lp->lp_softc == sc)
582 return (EEXIST);
583 return (EBUSY);
584 }
585
586 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
587 if (ifp->if_type != IFT_ETHER)
588 return (EPROTONOSUPPORT);
589
590 #ifdef INET6
591 /*
592 * The member interface should not have inet6 address because
593 * two interfaces with a valid link-local scope zone must not be
594 * merged in any form. This restriction is needed to
595 * prevent violation of link-local scope zone. Attempts to
596 * add a member interface which has inet6 addresses triggers
597 * removal of all inet6 addresses on the member interface.
598 */
599 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
600 if (in6ifa_llaonifp(lp->lp_ifp)) {
601 in6_ifdetach(lp->lp_ifp);
602 if_printf(sc->sc_ifp,
603 "IPv6 addresses on %s have been removed "
604 "before adding it as a member to prevent "
605 "IPv6 address scope violation.\n",
606 lp->lp_ifp->if_xname);
607 }
608 }
609 if (in6ifa_llaonifp(ifp)) {
610 in6_ifdetach(ifp);
611 if_printf(sc->sc_ifp,
612 "IPv6 addresses on %s have been removed "
613 "before adding it as a member to prevent "
614 "IPv6 address scope violation.\n",
615 ifp->if_xname);
616 }
617 #endif
618 /* Allow the first Ethernet member to define the MTU */
619 if (SLIST_EMPTY(&sc->sc_ports))
620 sc->sc_ifp->if_mtu = ifp->if_mtu;
621 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
622 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
623 ifp->if_xname);
624 return (EINVAL);
625 }
626
627 if ((lp = malloc(sizeof(struct lagg_port),
628 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
629 return (ENOMEM);
630
631 /* Check if port is a stacked lagg */
632 mtx_lock(&lagg_list_mtx);
633 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) {
634 if (ifp == sc_ptr->sc_ifp) {
635 mtx_unlock(&lagg_list_mtx);
636 free(lp, M_DEVBUF);
637 return (EINVAL);
638 /* XXX disable stacking for the moment, its untested */
639 #ifdef LAGG_PORT_STACKING
640 lp->lp_flags |= LAGG_PORT_STACK;
641 if (lagg_port_checkstacking(sc_ptr) >=
642 LAGG_MAX_STACKING) {
643 mtx_unlock(&lagg_list_mtx);
644 free(lp, M_DEVBUF);
645 return (E2BIG);
646 }
647 #endif
648 }
649 }
650 mtx_unlock(&lagg_list_mtx);
651
652 /* Change the interface type */
653 lp->lp_iftype = ifp->if_type;
654 ifp->if_type = IFT_IEEE8023ADLAG;
655 ifp->if_lagg = lp;
656 lp->lp_ioctl = ifp->if_ioctl;
657 ifp->if_ioctl = lagg_port_ioctl;
658 lp->lp_output = ifp->if_output;
659 ifp->if_output = lagg_port_output;
660
661 lp->lp_ifp = ifp;
662 lp->lp_softc = sc;
663
664 /* Save port link layer address */
665 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
666
667 if (SLIST_EMPTY(&sc->sc_ports)) {
668 sc->sc_primary = lp;
669 lagg_lladdr(sc, IF_LLADDR(ifp));
670 } else {
671 /* Update link layer address for this port */
672 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp));
673 }
674
675 /* Insert into the list of ports */
676 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
677 sc->sc_count++;
678
679 /* Update lagg capabilities */
680 lagg_capabilities(sc);
681 lagg_linkstate(sc);
682
683 /* Add multicast addresses and interface flags to this port */
684 lagg_ether_cmdmulti(lp, 1);
685 lagg_setflags(lp, 1);
686
687 if (sc->sc_port_create != NULL)
688 error = (*sc->sc_port_create)(lp);
689 if (error) {
690 /* remove the port again, without calling sc_port_destroy */
691 lagg_port_destroy(lp, 0);
692 return (error);
693 }
694
695 return (error);
696 }
697
698 #ifdef LAGG_PORT_STACKING
699 static int
700 lagg_port_checkstacking(struct lagg_softc *sc)
701 {
702 struct lagg_softc *sc_ptr;
703 struct lagg_port *lp;
704 int m = 0;
705
706 LAGG_WLOCK_ASSERT(sc);
707
708 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
709 if (lp->lp_flags & LAGG_PORT_STACK) {
710 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
711 m = MAX(m, lagg_port_checkstacking(sc_ptr));
712 }
713 }
714
715 return (m + 1);
716 }
717 #endif
718
719 static int
720 lagg_port_destroy(struct lagg_port *lp, int runpd)
721 {
722 struct lagg_softc *sc = lp->lp_softc;
723 struct lagg_port *lp_ptr;
724 struct lagg_llq *llq;
725 struct ifnet *ifp = lp->lp_ifp;
726
727 LAGG_WLOCK_ASSERT(sc);
728
729 if (runpd && sc->sc_port_destroy != NULL)
730 (*sc->sc_port_destroy)(lp);
731
732 /*
733 * Remove multicast addresses and interface flags from this port and
734 * reset the MAC address, skip if the interface is being detached.
735 */
736 if (!lp->lp_detaching) {
737 lagg_ether_cmdmulti(lp, 0);
738 lagg_setflags(lp, 0);
739 lagg_port_lladdr(lp, lp->lp_lladdr);
740 }
741
742 /* Restore interface */
743 ifp->if_type = lp->lp_iftype;
744 ifp->if_ioctl = lp->lp_ioctl;
745 ifp->if_output = lp->lp_output;
746 ifp->if_lagg = NULL;
747
748 /* Finally, remove the port from the lagg */
749 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
750 sc->sc_count--;
751
752 /* Update the primary interface */
753 if (lp == sc->sc_primary) {
754 uint8_t lladdr[ETHER_ADDR_LEN];
755
756 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) {
757 bzero(&lladdr, ETHER_ADDR_LEN);
758 } else {
759 bcopy(lp_ptr->lp_lladdr,
760 lladdr, ETHER_ADDR_LEN);
761 }
762 lagg_lladdr(sc, lladdr);
763 sc->sc_primary = lp_ptr;
764
765 /* Update link layer address for each port */
766 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
767 lagg_port_lladdr(lp_ptr, lladdr);
768 }
769
770 /* Remove any pending lladdr changes from the queue */
771 if (lp->lp_detaching) {
772 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
773 if (llq->llq_ifp == ifp) {
774 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
775 llq_entries);
776 free(llq, M_DEVBUF);
777 break; /* Only appears once */
778 }
779 }
780 }
781
782 if (lp->lp_ifflags)
783 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
784
785 free(lp, M_DEVBUF);
786
787 /* Update lagg capabilities */
788 lagg_capabilities(sc);
789 lagg_linkstate(sc);
790
791 return (0);
792 }
793
794 static int
795 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
796 {
797 struct lagg_reqport *rp = (struct lagg_reqport *)data;
798 struct lagg_softc *sc;
799 struct lagg_port *lp = NULL;
800 int error = 0;
801 struct rm_priotracker tracker;
802
803 /* Should be checked by the caller */
804 if (ifp->if_type != IFT_IEEE8023ADLAG ||
805 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
806 goto fallback;
807
808 switch (cmd) {
809 case SIOCGLAGGPORT:
810 if (rp->rp_portname[0] == '\0' ||
811 ifunit(rp->rp_portname) != ifp) {
812 error = EINVAL;
813 break;
814 }
815
816 LAGG_RLOCK(sc, &tracker);
817 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
818 error = ENOENT;
819 LAGG_RUNLOCK(sc, &tracker);
820 break;
821 }
822
823 lagg_port2req(lp, rp);
824 LAGG_RUNLOCK(sc, &tracker);
825 break;
826
827 case SIOCSIFCAP:
828 if (lp->lp_ioctl == NULL) {
829 error = EINVAL;
830 break;
831 }
832 error = (*lp->lp_ioctl)(ifp, cmd, data);
833 if (error)
834 break;
835
836 /* Update lagg interface capabilities */
837 LAGG_WLOCK(sc);
838 lagg_capabilities(sc);
839 LAGG_WUNLOCK(sc);
840 break;
841
842 case SIOCSIFMTU:
843 /* Do not allow the MTU to be changed once joined */
844 error = EINVAL;
845 break;
846
847 default:
848 goto fallback;
849 }
850
851 return (error);
852
853 fallback:
854 if (lp->lp_ioctl != NULL)
855 return ((*lp->lp_ioctl)(ifp, cmd, data));
856
857 return (EINVAL);
858 }
859
860 /*
861 * For direct output to child ports.
862 */
863 static int
864 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
865 const struct sockaddr *dst, struct route *ro)
866 {
867 struct lagg_port *lp = ifp->if_lagg;
868
869 switch (dst->sa_family) {
870 case pseudo_AF_HDRCMPLT:
871 case AF_UNSPEC:
872 return ((*lp->lp_output)(ifp, m, dst, ro));
873 }
874
875 /* drop any other frames */
876 m_freem(m);
877 return (ENETDOWN);
878 }
879
880 static void
881 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
882 {
883 struct lagg_port *lp;
884 struct lagg_softc *sc;
885
886 if ((lp = ifp->if_lagg) == NULL)
887 return;
888 /* If the ifnet is just being renamed, don't do anything. */
889 if (ifp->if_flags & IFF_RENAMING)
890 return;
891
892 sc = lp->lp_softc;
893
894 LAGG_WLOCK(sc);
895 lp->lp_detaching = 1;
896 lagg_port_destroy(lp, 1);
897 LAGG_WUNLOCK(sc);
898 }
899
900 static void
901 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
902 {
903 struct lagg_softc *sc = lp->lp_softc;
904
905 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
906 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
907 rp->rp_prio = lp->lp_prio;
908 rp->rp_flags = lp->lp_flags;
909 if (sc->sc_portreq != NULL)
910 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc);
911
912 /* Add protocol specific flags */
913 switch (sc->sc_proto) {
914 case LAGG_PROTO_FAILOVER:
915 if (lp == sc->sc_primary)
916 rp->rp_flags |= LAGG_PORT_MASTER;
917 if (lp == lagg_link_active(sc, sc->sc_primary))
918 rp->rp_flags |= LAGG_PORT_ACTIVE;
919 break;
920
921 case LAGG_PROTO_ROUNDROBIN:
922 case LAGG_PROTO_LOADBALANCE:
923 case LAGG_PROTO_ETHERCHANNEL:
924 if (LAGG_PORTACTIVE(lp))
925 rp->rp_flags |= LAGG_PORT_ACTIVE;
926 break;
927
928 case LAGG_PROTO_LACP:
929 /* LACP has a different definition of active */
930 if (lacp_isactive(lp))
931 rp->rp_flags |= LAGG_PORT_ACTIVE;
932 if (lacp_iscollecting(lp))
933 rp->rp_flags |= LAGG_PORT_COLLECTING;
934 if (lacp_isdistributing(lp))
935 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
936 break;
937 }
938
939 }
940
941 static void
942 lagg_init(void *xsc)
943 {
944 struct lagg_softc *sc = (struct lagg_softc *)xsc;
945 struct lagg_port *lp;
946 struct ifnet *ifp = sc->sc_ifp;
947
948 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
949 return;
950
951 LAGG_WLOCK(sc);
952
953 ifp->if_drv_flags |= IFF_DRV_RUNNING;
954 /* Update the port lladdrs */
955 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
956 lagg_port_lladdr(lp, IF_LLADDR(ifp));
957
958 if (sc->sc_init != NULL)
959 (*sc->sc_init)(sc);
960
961 LAGG_WUNLOCK(sc);
962 }
963
964 static void
965 lagg_stop(struct lagg_softc *sc)
966 {
967 struct ifnet *ifp = sc->sc_ifp;
968
969 LAGG_WLOCK_ASSERT(sc);
970
971 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
972 return;
973
974 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
975
976 if (sc->sc_stop != NULL)
977 (*sc->sc_stop)(sc);
978 }
979
980 static int
981 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
982 {
983 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
984 struct lagg_reqall *ra = (struct lagg_reqall *)data;
985 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
986 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
987 struct ifreq *ifr = (struct ifreq *)data;
988 struct lagg_port *lp;
989 struct ifnet *tpif;
990 struct thread *td = curthread;
991 char *buf, *outbuf;
992 int count, buflen, len, error = 0;
993 struct rm_priotracker tracker;
994
995 bzero(&rpbuf, sizeof(rpbuf));
996
997 switch (cmd) {
998 case SIOCGLAGG:
999 LAGG_RLOCK(sc, &tracker);
1000 count = 0;
1001 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1002 count++;
1003 buflen = count * sizeof(struct lagg_reqport);
1004 LAGG_RUNLOCK(sc, &tracker);
1005
1006 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1007
1008 LAGG_RLOCK(sc, &tracker);
1009 ra->ra_proto = sc->sc_proto;
1010 if (sc->sc_req != NULL)
1011 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc);
1012
1013 count = 0;
1014 buf = outbuf;
1015 len = min(ra->ra_size, buflen);
1016 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1017 if (len < sizeof(rpbuf))
1018 break;
1019
1020 lagg_port2req(lp, &rpbuf);
1021 memcpy(buf, &rpbuf, sizeof(rpbuf));
1022 count++;
1023 buf += sizeof(rpbuf);
1024 len -= sizeof(rpbuf);
1025 }
1026 LAGG_RUNLOCK(sc, &tracker);
1027 ra->ra_ports = count;
1028 ra->ra_size = count * sizeof(rpbuf);
1029 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1030 free(outbuf, M_TEMP);
1031 break;
1032 case SIOCSLAGG:
1033 error = priv_check(td, PRIV_NET_LAGG);
1034 if (error)
1035 break;
1036 if (ra->ra_proto >= LAGG_PROTO_MAX) {
1037 error = EPROTONOSUPPORT;
1038 break;
1039 }
1040 LAGG_WLOCK(sc);
1041 if (sc->sc_proto != LAGG_PROTO_NONE) {
1042 /* Reset protocol first in case detach unlocks */
1043 sc->sc_proto = LAGG_PROTO_NONE;
1044 error = sc->sc_detach(sc);
1045 sc->sc_detach = NULL;
1046 sc->sc_start = NULL;
1047 sc->sc_input = NULL;
1048 sc->sc_port_create = NULL;
1049 sc->sc_port_destroy = NULL;
1050 sc->sc_linkstate = NULL;
1051 sc->sc_init = NULL;
1052 sc->sc_stop = NULL;
1053 sc->sc_lladdr = NULL;
1054 sc->sc_req = NULL;
1055 sc->sc_portreq = NULL;
1056 } else if (sc->sc_input != NULL) {
1057 /* Still detaching */
1058 error = EBUSY;
1059 }
1060 if (error != 0) {
1061 LAGG_WUNLOCK(sc);
1062 break;
1063 }
1064 for (int i = 0; i < (sizeof(lagg_protos) /
1065 sizeof(lagg_protos[0])); i++) {
1066 if (lagg_protos[i].ti_proto == ra->ra_proto) {
1067 if (sc->sc_ifflags & IFF_DEBUG)
1068 printf("%s: using proto %u\n",
1069 sc->sc_ifname,
1070 lagg_protos[i].ti_proto);
1071 sc->sc_proto = lagg_protos[i].ti_proto;
1072 if (sc->sc_proto != LAGG_PROTO_NONE)
1073 error = lagg_protos[i].ti_attach(sc);
1074 LAGG_WUNLOCK(sc);
1075 return (error);
1076 }
1077 }
1078 LAGG_WUNLOCK(sc);
1079 error = EPROTONOSUPPORT;
1080 break;
1081 case SIOCGLAGGFLAGS:
1082 rf->rf_flags = sc->sc_flags;
1083 break;
1084 case SIOCSLAGGHASH:
1085 error = priv_check(td, PRIV_NET_LAGG);
1086 if (error)
1087 break;
1088 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1089 error = EINVAL;
1090 break;
1091 }
1092 LAGG_WLOCK(sc);
1093 sc->sc_flags &= ~LAGG_F_HASHMASK;
1094 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK;
1095 LAGG_WUNLOCK(sc);
1096 break;
1097 case SIOCGLAGGPORT:
1098 if (rp->rp_portname[0] == '\0' ||
1099 (tpif = ifunit(rp->rp_portname)) == NULL) {
1100 error = EINVAL;
1101 break;
1102 }
1103
1104 LAGG_RLOCK(sc, &tracker);
1105 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1106 lp->lp_softc != sc) {
1107 error = ENOENT;
1108 LAGG_RUNLOCK(sc, &tracker);
1109 break;
1110 }
1111
1112 lagg_port2req(lp, rp);
1113 LAGG_RUNLOCK(sc, &tracker);
1114 break;
1115 case SIOCSLAGGPORT:
1116 error = priv_check(td, PRIV_NET_LAGG);
1117 if (error)
1118 break;
1119 if (rp->rp_portname[0] == '\0' ||
1120 (tpif = ifunit(rp->rp_portname)) == NULL) {
1121 error = EINVAL;
1122 break;
1123 }
1124 LAGG_WLOCK(sc);
1125 error = lagg_port_create(sc, tpif);
1126 LAGG_WUNLOCK(sc);
1127 break;
1128 case SIOCSLAGGDELPORT:
1129 error = priv_check(td, PRIV_NET_LAGG);
1130 if (error)
1131 break;
1132 if (rp->rp_portname[0] == '\0' ||
1133 (tpif = ifunit(rp->rp_portname)) == NULL) {
1134 error = EINVAL;
1135 break;
1136 }
1137
1138 LAGG_WLOCK(sc);
1139 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1140 lp->lp_softc != sc) {
1141 error = ENOENT;
1142 LAGG_WUNLOCK(sc);
1143 break;
1144 }
1145
1146 error = lagg_port_destroy(lp, 1);
1147 LAGG_WUNLOCK(sc);
1148 break;
1149 case SIOCSIFFLAGS:
1150 /* Set flags on ports too */
1151 LAGG_WLOCK(sc);
1152 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1153 lagg_setflags(lp, 1);
1154 }
1155 LAGG_WUNLOCK(sc);
1156
1157 if (!(ifp->if_flags & IFF_UP) &&
1158 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1159 /*
1160 * If interface is marked down and it is running,
1161 * then stop and disable it.
1162 */
1163 LAGG_WLOCK(sc);
1164 lagg_stop(sc);
1165 LAGG_WUNLOCK(sc);
1166 } else if ((ifp->if_flags & IFF_UP) &&
1167 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1168 /*
1169 * If interface is marked up and it is stopped, then
1170 * start it.
1171 */
1172 (*ifp->if_init)(sc);
1173 }
1174 break;
1175 case SIOCADDMULTI:
1176 case SIOCDELMULTI:
1177 LAGG_WLOCK(sc);
1178 error = lagg_ether_setmulti(sc);
1179 LAGG_WUNLOCK(sc);
1180 break;
1181 case SIOCSIFMEDIA:
1182 case SIOCGIFMEDIA:
1183 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1184 break;
1185
1186 case SIOCSIFCAP:
1187 case SIOCSIFMTU:
1188 /* Do not allow the MTU or caps to be directly changed */
1189 error = EINVAL;
1190 break;
1191
1192 default:
1193 error = ether_ioctl(ifp, cmd, data);
1194 break;
1195 }
1196 return (error);
1197 }
1198
1199 static int
1200 lagg_ether_setmulti(struct lagg_softc *sc)
1201 {
1202 struct lagg_port *lp;
1203
1204 LAGG_WLOCK_ASSERT(sc);
1205
1206 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1207 /* First, remove any existing filter entries. */
1208 lagg_ether_cmdmulti(lp, 0);
1209 /* copy all addresses from the lagg interface to the port */
1210 lagg_ether_cmdmulti(lp, 1);
1211 }
1212 return (0);
1213 }
1214
1215 static int
1216 lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1217 {
1218 struct lagg_softc *sc = lp->lp_softc;
1219 struct ifnet *ifp = lp->lp_ifp;
1220 struct ifnet *scifp = sc->sc_ifp;
1221 struct lagg_mc *mc;
1222 struct ifmultiaddr *ifma;
1223 int error;
1224
1225 LAGG_WLOCK_ASSERT(sc);
1226
1227 if (set) {
1228 IF_ADDR_WLOCK(scifp);
1229 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1230 if (ifma->ifma_addr->sa_family != AF_LINK)
1231 continue;
1232 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1233 if (mc == NULL) {
1234 IF_ADDR_WUNLOCK(scifp);
1235 return (ENOMEM);
1236 }
1237 bcopy(ifma->ifma_addr, &mc->mc_addr,
1238 ifma->ifma_addr->sa_len);
1239 mc->mc_addr.sdl_index = ifp->if_index;
1240 mc->mc_ifma = NULL;
1241 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1242 }
1243 IF_ADDR_WUNLOCK(scifp);
1244 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
1245 error = if_addmulti(ifp,
1246 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
1247 if (error)
1248 return (error);
1249 }
1250 } else {
1251 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1252 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1253 if (mc->mc_ifma && !lp->lp_detaching)
1254 if_delmulti_ifma(mc->mc_ifma);
1255 free(mc, M_DEVBUF);
1256 }
1257 }
1258 return (0);
1259 }
1260
1261 /* Handle a ref counted flag that should be set on the lagg port as well */
1262 static int
1263 lagg_setflag(struct lagg_port *lp, int flag, int status,
1264 int (*func)(struct ifnet *, int))
1265 {
1266 struct lagg_softc *sc = lp->lp_softc;
1267 struct ifnet *scifp = sc->sc_ifp;
1268 struct ifnet *ifp = lp->lp_ifp;
1269 int error;
1270
1271 LAGG_WLOCK_ASSERT(sc);
1272
1273 status = status ? (scifp->if_flags & flag) : 0;
1274 /* Now "status" contains the flag value or 0 */
1275
1276 /*
1277 * See if recorded ports status is different from what
1278 * we want it to be. If it is, flip it. We record ports
1279 * status in lp_ifflags so that we won't clear ports flag
1280 * we haven't set. In fact, we don't clear or set ports
1281 * flags directly, but get or release references to them.
1282 * That's why we can be sure that recorded flags still are
1283 * in accord with actual ports flags.
1284 */
1285 if (status != (lp->lp_ifflags & flag)) {
1286 error = (*func)(ifp, status);
1287 if (error)
1288 return (error);
1289 lp->lp_ifflags &= ~flag;
1290 lp->lp_ifflags |= status;
1291 }
1292 return (0);
1293 }
1294
1295 /*
1296 * Handle IFF_* flags that require certain changes on the lagg port
1297 * if "status" is true, update ports flags respective to the lagg
1298 * if "status" is false, forcedly clear the flags set on port.
1299 */
1300 static int
1301 lagg_setflags(struct lagg_port *lp, int status)
1302 {
1303 int error, i;
1304
1305 for (i = 0; lagg_pflags[i].flag; i++) {
1306 error = lagg_setflag(lp, lagg_pflags[i].flag,
1307 status, lagg_pflags[i].func);
1308 if (error)
1309 return (error);
1310 }
1311 return (0);
1312 }
1313
1314 static int
1315 lagg_transmit(struct ifnet *ifp, struct mbuf *m)
1316 {
1317 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1318 int error, len, mcast;
1319 struct rm_priotracker tracker;
1320
1321 len = m->m_pkthdr.len;
1322 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
1323
1324 LAGG_RLOCK(sc, &tracker);
1325 /* We need a Tx algorithm and at least one port */
1326 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
1327 LAGG_RUNLOCK(sc, &tracker);
1328 m_freem(m);
1329 ifp->if_oerrors++;
1330 return (ENXIO);
1331 }
1332
1333 ETHER_BPF_MTAP(ifp, m);
1334
1335 error = (*sc->sc_start)(sc, m);
1336 LAGG_RUNLOCK(sc, &tracker);
1337
1338 if (error == 0) {
1339 counter_u64_add(sc->sc_opackets, 1);
1340 counter_u64_add(sc->sc_obytes, len);
1341 ifp->if_omcasts += mcast;
1342 } else
1343 ifp->if_oerrors++;
1344
1345 return (error);
1346 }
1347
1348 /*
1349 * The ifp->if_qflush entry point for lagg(4) is no-op.
1350 */
1351 static void
1352 lagg_qflush(struct ifnet *ifp __unused)
1353 {
1354 }
1355
1356 static struct mbuf *
1357 lagg_input(struct ifnet *ifp, struct mbuf *m)
1358 {
1359 struct lagg_port *lp = ifp->if_lagg;
1360 struct lagg_softc *sc = lp->lp_softc;
1361 struct ifnet *scifp = sc->sc_ifp;
1362 struct rm_priotracker tracker;
1363
1364 LAGG_RLOCK(sc, &tracker);
1365 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1366 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1367 sc->sc_proto == LAGG_PROTO_NONE) {
1368 LAGG_RUNLOCK(sc, &tracker);
1369 m_freem(m);
1370 return (NULL);
1371 }
1372
1373 ETHER_BPF_MTAP(scifp, m);
1374
1375 m = (*sc->sc_input)(sc, lp, m);
1376
1377 if (m != NULL) {
1378 counter_u64_add(sc->sc_ipackets, 1);
1379 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len);
1380
1381 if (scifp->if_flags & IFF_MONITOR) {
1382 m_freem(m);
1383 m = NULL;
1384 }
1385 }
1386
1387 LAGG_RUNLOCK(sc, &tracker);
1388 return (m);
1389 }
1390
1391 static int
1392 lagg_media_change(struct ifnet *ifp)
1393 {
1394 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1395
1396 if (sc->sc_ifflags & IFF_DEBUG)
1397 printf("%s\n", __func__);
1398
1399 /* Ignore */
1400 return (0);
1401 }
1402
1403 static void
1404 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1405 {
1406 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1407 struct lagg_port *lp;
1408 struct rm_priotracker tracker;
1409
1410 imr->ifm_status = IFM_AVALID;
1411 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1412
1413 LAGG_RLOCK(sc, &tracker);
1414 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1415 if (LAGG_PORTACTIVE(lp))
1416 imr->ifm_status |= IFM_ACTIVE;
1417 }
1418 LAGG_RUNLOCK(sc, &tracker);
1419 }
1420
1421 static void
1422 lagg_linkstate(struct lagg_softc *sc)
1423 {
1424 struct lagg_port *lp;
1425 int new_link = LINK_STATE_DOWN;
1426 uint64_t speed;
1427
1428 /* Our link is considered up if at least one of our ports is active */
1429 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1430 if (lp->lp_link_state == LINK_STATE_UP) {
1431 new_link = LINK_STATE_UP;
1432 break;
1433 }
1434 }
1435 if_link_state_change(sc->sc_ifp, new_link);
1436
1437 /* Update if_baudrate to reflect the max possible speed */
1438 switch (sc->sc_proto) {
1439 case LAGG_PROTO_FAILOVER:
1440 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
1441 sc->sc_primary->lp_ifp->if_baudrate : 0;
1442 break;
1443 case LAGG_PROTO_ROUNDROBIN:
1444 case LAGG_PROTO_LOADBALANCE:
1445 case LAGG_PROTO_ETHERCHANNEL:
1446 speed = 0;
1447 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1448 speed += lp->lp_ifp->if_baudrate;
1449 sc->sc_ifp->if_baudrate = speed;
1450 break;
1451 case LAGG_PROTO_LACP:
1452 /* LACP updates if_baudrate itself */
1453 break;
1454 }
1455 }
1456
1457 static void
1458 lagg_port_state(struct ifnet *ifp, int state)
1459 {
1460 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1461 struct lagg_softc *sc = NULL;
1462
1463 if (lp != NULL)
1464 sc = lp->lp_softc;
1465 if (sc == NULL)
1466 return;
1467
1468 LAGG_WLOCK(sc);
1469 lagg_linkstate(sc);
1470 if (sc->sc_linkstate != NULL)
1471 (*sc->sc_linkstate)(lp);
1472 LAGG_WUNLOCK(sc);
1473 }
1474
1475 struct lagg_port *
1476 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1477 {
1478 struct lagg_port *lp_next, *rval = NULL;
1479 // int new_link = LINK_STATE_DOWN;
1480
1481 LAGG_RLOCK_ASSERT(sc);
1482 /*
1483 * Search a port which reports an active link state.
1484 */
1485
1486 if (lp == NULL)
1487 goto search;
1488 if (LAGG_PORTACTIVE(lp)) {
1489 rval = lp;
1490 goto found;
1491 }
1492 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1493 LAGG_PORTACTIVE(lp_next)) {
1494 rval = lp_next;
1495 goto found;
1496 }
1497
1498 search:
1499 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1500 if (LAGG_PORTACTIVE(lp_next)) {
1501 rval = lp_next;
1502 goto found;
1503 }
1504 }
1505
1506 found:
1507 if (rval != NULL) {
1508 /*
1509 * The IEEE 802.1D standard assumes that a lagg with
1510 * multiple ports is always full duplex. This is valid
1511 * for load sharing laggs and if at least two links
1512 * are active. Unfortunately, checking the latter would
1513 * be too expensive at this point.
1514 XXX
1515 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1516 (sc->sc_count > 1))
1517 new_link = LINK_STATE_FULL_DUPLEX;
1518 else
1519 new_link = rval->lp_link_state;
1520 */
1521 }
1522
1523 return (rval);
1524 }
1525
1526 static const void *
1527 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf)
1528 {
1529 if (m->m_pkthdr.len < (off + len)) {
1530 return (NULL);
1531 } else if (m->m_len < (off + len)) {
1532 m_copydata(m, off, len, buf);
1533 return (buf);
1534 }
1535 return (mtod(m, char *) + off);
1536 }
1537
1538 static int
1539 lagg_sysctl_active(SYSCTL_HANDLER_ARGS)
1540 {
1541 struct lagg_softc *sc = (struct lagg_softc *)arg1;
1542 struct lagg_port *lp;
1543 int error;
1544
1545 /* LACP tracks active links automatically, the others do not */
1546 if (sc->sc_proto != LAGG_PROTO_LACP) {
1547 sc->sc_active = 0;
1548 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1549 sc->sc_active += LAGG_PORTACTIVE(lp);
1550 }
1551
1552 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req);
1553 if ((error) || (req->newptr == NULL))
1554 return (error);
1555
1556 return (0);
1557 }
1558
1559 uint32_t
1560 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key)
1561 {
1562 uint16_t etype;
1563 uint32_t p = key;
1564 int off;
1565 struct ether_header *eh;
1566 const struct ether_vlan_header *vlan;
1567 #ifdef INET
1568 const struct ip *ip;
1569 const uint32_t *ports;
1570 int iphlen;
1571 #endif
1572 #ifdef INET6
1573 const struct ip6_hdr *ip6;
1574 uint32_t flow;
1575 #endif
1576 union {
1577 #ifdef INET
1578 struct ip ip;
1579 #endif
1580 #ifdef INET6
1581 struct ip6_hdr ip6;
1582 #endif
1583 struct ether_vlan_header vlan;
1584 uint32_t port;
1585 } buf;
1586
1587
1588 off = sizeof(*eh);
1589 if (m->m_len < off)
1590 goto out;
1591 eh = mtod(m, struct ether_header *);
1592 etype = ntohs(eh->ether_type);
1593 if (sc->sc_flags & LAGG_F_HASHL2) {
1594 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p);
1595 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p);
1596 }
1597
1598 /* Special handling for encapsulating VLAN frames */
1599 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) {
1600 p = hash32_buf(&m->m_pkthdr.ether_vtag,
1601 sizeof(m->m_pkthdr.ether_vtag), p);
1602 } else if (etype == ETHERTYPE_VLAN) {
1603 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf);
1604 if (vlan == NULL)
1605 goto out;
1606
1607 if (sc->sc_flags & LAGG_F_HASHL2)
1608 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p);
1609 etype = ntohs(vlan->evl_proto);
1610 off += sizeof(*vlan) - sizeof(*eh);
1611 }
1612
1613 switch (etype) {
1614 #ifdef INET
1615 case ETHERTYPE_IP:
1616 ip = lagg_gethdr(m, off, sizeof(*ip), &buf);
1617 if (ip == NULL)
1618 goto out;
1619
1620 if (sc->sc_flags & LAGG_F_HASHL3) {
1621 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p);
1622 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p);
1623 }
1624 if (!(sc->sc_flags & LAGG_F_HASHL4))
1625 break;
1626 switch (ip->ip_p) {
1627 case IPPROTO_TCP:
1628 case IPPROTO_UDP:
1629 case IPPROTO_SCTP:
1630 iphlen = ip->ip_hl << 2;
1631 if (iphlen < sizeof(*ip))
1632 break;
1633 off += iphlen;
1634 ports = lagg_gethdr(m, off, sizeof(*ports), &buf);
1635 if (ports == NULL)
1636 break;
1637 p = hash32_buf(ports, sizeof(*ports), p);
1638 break;
1639 }
1640 break;
1641 #endif
1642 #ifdef INET6
1643 case ETHERTYPE_IPV6:
1644 if (!(sc->sc_flags & LAGG_F_HASHL3))
1645 break;
1646 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf);
1647 if (ip6 == NULL)
1648 goto out;
1649
1650 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p);
1651 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p);
1652 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
1653 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */
1654 break;
1655 #endif
1656 }
1657 out:
1658 return (p);
1659 }
1660
1661 int
1662 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1663 {
1664
1665 return (ifp->if_transmit)(ifp, m);
1666 }
1667
1668 /*
1669 * Simple round robin aggregation
1670 */
1671
1672 static int
1673 lagg_rr_attach(struct lagg_softc *sc)
1674 {
1675 sc->sc_detach = lagg_rr_detach;
1676 sc->sc_start = lagg_rr_start;
1677 sc->sc_input = lagg_rr_input;
1678 sc->sc_port_create = NULL;
1679 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1680 sc->sc_seq = 0;
1681
1682 return (0);
1683 }
1684
1685 static int
1686 lagg_rr_detach(struct lagg_softc *sc)
1687 {
1688 return (0);
1689 }
1690
1691 static int
1692 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1693 {
1694 struct lagg_port *lp;
1695 uint32_t p;
1696
1697 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1698 p %= sc->sc_count;
1699 lp = SLIST_FIRST(&sc->sc_ports);
1700 while (p--)
1701 lp = SLIST_NEXT(lp, lp_entries);
1702
1703 /*
1704 * Check the port's link state. This will return the next active
1705 * port if the link is down or the port is NULL.
1706 */
1707 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1708 m_freem(m);
1709 return (ENETDOWN);
1710 }
1711
1712 /* Send mbuf */
1713 return (lagg_enqueue(lp->lp_ifp, m));
1714 }
1715
1716 static struct mbuf *
1717 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1718 {
1719 struct ifnet *ifp = sc->sc_ifp;
1720
1721 /* Just pass in the packet to our lagg device */
1722 m->m_pkthdr.rcvif = ifp;
1723
1724 return (m);
1725 }
1726
1727 /*
1728 * Active failover
1729 */
1730
1731 static int
1732 lagg_fail_attach(struct lagg_softc *sc)
1733 {
1734 sc->sc_detach = lagg_fail_detach;
1735 sc->sc_start = lagg_fail_start;
1736 sc->sc_input = lagg_fail_input;
1737 sc->sc_port_create = NULL;
1738 sc->sc_port_destroy = NULL;
1739
1740 return (0);
1741 }
1742
1743 static int
1744 lagg_fail_detach(struct lagg_softc *sc)
1745 {
1746 return (0);
1747 }
1748
1749 static int
1750 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
1751 {
1752 struct lagg_port *lp;
1753
1754 /* Use the master port if active or the next available port */
1755 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
1756 m_freem(m);
1757 return (ENETDOWN);
1758 }
1759
1760 /* Send mbuf */
1761 return (lagg_enqueue(lp->lp_ifp, m));
1762 }
1763
1764 static struct mbuf *
1765 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1766 {
1767 struct ifnet *ifp = sc->sc_ifp;
1768 struct lagg_port *tmp_tp;
1769
1770 if (lp == sc->sc_primary || lagg_failover_rx_all) {
1771 m->m_pkthdr.rcvif = ifp;
1772 return (m);
1773 }
1774
1775 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
1776 tmp_tp = lagg_link_active(sc, sc->sc_primary);
1777 /*
1778 * If tmp_tp is null, we've recieved a packet when all
1779 * our links are down. Weird, but process it anyways.
1780 */
1781 if ((tmp_tp == NULL || tmp_tp == lp)) {
1782 m->m_pkthdr.rcvif = ifp;
1783 return (m);
1784 }
1785 }
1786
1787 m_freem(m);
1788 return (NULL);
1789 }
1790
1791 /*
1792 * Loadbalancing
1793 */
1794
1795 static int
1796 lagg_lb_attach(struct lagg_softc *sc)
1797 {
1798 struct lagg_port *lp;
1799 struct lagg_lb *lb;
1800
1801 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb),
1802 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
1803 return (ENOMEM);
1804
1805 sc->sc_detach = lagg_lb_detach;
1806 sc->sc_start = lagg_lb_start;
1807 sc->sc_input = lagg_lb_input;
1808 sc->sc_port_create = lagg_lb_port_create;
1809 sc->sc_port_destroy = lagg_lb_port_destroy;
1810 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1811
1812 lb->lb_key = arc4random();
1813 sc->sc_psc = (caddr_t)lb;
1814
1815 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1816 lagg_lb_port_create(lp);
1817
1818 return (0);
1819 }
1820
1821 static int
1822 lagg_lb_detach(struct lagg_softc *sc)
1823 {
1824 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1825 if (lb != NULL)
1826 free(lb, M_DEVBUF);
1827 return (0);
1828 }
1829
1830 static int
1831 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
1832 {
1833 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1834 struct lagg_port *lp_next;
1835 int i = 0;
1836
1837 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
1838 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1839 if (lp_next == lp)
1840 continue;
1841 if (i >= LAGG_MAX_PORTS)
1842 return (EINVAL);
1843 if (sc->sc_ifflags & IFF_DEBUG)
1844 printf("%s: port %s at index %d\n",
1845 sc->sc_ifname, lp_next->lp_ifname, i);
1846 lb->lb_ports[i++] = lp_next;
1847 }
1848
1849 return (0);
1850 }
1851
1852 static int
1853 lagg_lb_port_create(struct lagg_port *lp)
1854 {
1855 struct lagg_softc *sc = lp->lp_softc;
1856 return (lagg_lb_porttable(sc, NULL));
1857 }
1858
1859 static void
1860 lagg_lb_port_destroy(struct lagg_port *lp)
1861 {
1862 struct lagg_softc *sc = lp->lp_softc;
1863 lagg_lb_porttable(sc, lp);
1864 }
1865
1866 static int
1867 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
1868 {
1869 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1870 struct lagg_port *lp = NULL;
1871 uint32_t p = 0;
1872
1873 if (sc->use_flowid && (m->m_flags & M_FLOWID))
1874 p = m->m_pkthdr.flowid >> sc->flowid_shift;
1875 else
1876 p = lagg_hashmbuf(sc, m, lb->lb_key);
1877 p %= sc->sc_count;
1878 lp = lb->lb_ports[p];
1879
1880 /*
1881 * Check the port's link state. This will return the next active
1882 * port if the link is down or the port is NULL.
1883 */
1884 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1885 m_freem(m);
1886 return (ENETDOWN);
1887 }
1888
1889 /* Send mbuf */
1890 return (lagg_enqueue(lp->lp_ifp, m));
1891 }
1892
1893 static struct mbuf *
1894 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1895 {
1896 struct ifnet *ifp = sc->sc_ifp;
1897
1898 /* Just pass in the packet to our lagg device */
1899 m->m_pkthdr.rcvif = ifp;
1900
1901 return (m);
1902 }
1903
1904 /*
1905 * 802.3ad LACP
1906 */
1907
1908 static int
1909 lagg_lacp_attach(struct lagg_softc *sc)
1910 {
1911 struct lagg_port *lp;
1912 int error;
1913
1914 sc->sc_detach = lagg_lacp_detach;
1915 sc->sc_port_create = lacp_port_create;
1916 sc->sc_port_destroy = lacp_port_destroy;
1917 sc->sc_linkstate = lacp_linkstate;
1918 sc->sc_start = lagg_lacp_start;
1919 sc->sc_input = lagg_lacp_input;
1920 sc->sc_init = lacp_init;
1921 sc->sc_stop = lacp_stop;
1922 sc->sc_lladdr = lagg_lacp_lladdr;
1923 sc->sc_req = lacp_req;
1924 sc->sc_portreq = lacp_portreq;
1925
1926 error = lacp_attach(sc);
1927 if (error)
1928 return (error);
1929
1930 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1931 lacp_port_create(lp);
1932
1933 return (error);
1934 }
1935
1936 static int
1937 lagg_lacp_detach(struct lagg_softc *sc)
1938 {
1939 struct lagg_port *lp;
1940 int error;
1941
1942 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1943 lacp_port_destroy(lp);
1944
1945 /* unlocking is safe here */
1946 LAGG_WUNLOCK(sc);
1947 error = lacp_detach(sc);
1948 LAGG_WLOCK(sc);
1949
1950 return (error);
1951 }
1952
1953 static void
1954 lagg_lacp_lladdr(struct lagg_softc *sc)
1955 {
1956 struct lagg_port *lp;
1957
1958 /* purge all the lacp ports */
1959 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1960 lacp_port_destroy(lp);
1961
1962 /* add them back in */
1963 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1964 lacp_port_create(lp);
1965 }
1966
1967 static int
1968 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
1969 {
1970 struct lagg_port *lp;
1971
1972 lp = lacp_select_tx_port(sc, m);
1973 if (lp == NULL) {
1974 m_freem(m);
1975 return (ENETDOWN);
1976 }
1977
1978 /* Send mbuf */
1979 return (lagg_enqueue(lp->lp_ifp, m));
1980 }
1981
1982 static struct mbuf *
1983 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1984 {
1985 struct ifnet *ifp = sc->sc_ifp;
1986 struct ether_header *eh;
1987 u_short etype;
1988
1989 eh = mtod(m, struct ether_header *);
1990 etype = ntohs(eh->ether_type);
1991
1992 /* Tap off LACP control messages */
1993 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
1994 m = lacp_input(lp, m);
1995 if (m == NULL)
1996 return (NULL);
1997 }
1998
1999 /*
2000 * If the port is not collecting or not in the active aggregator then
2001 * free and return.
2002 */
2003 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
2004 m_freem(m);
2005 return (NULL);
2006 }
2007
2008 m->m_pkthdr.rcvif = ifp;
2009 return (m);
2010 }
2011
2012 static void
2013 lagg_callout(void *arg)
2014 {
2015 struct lagg_softc *sc = (struct lagg_softc *)arg;
2016 struct ifnet *ifp = sc->sc_ifp;
2017
2018 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets);
2019 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets);
2020 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes);
2021 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes);
2022
2023 callout_reset(&sc->sc_callout, hz, lagg_callout, sc);
2024 }
Cache object: 2af6489807ec229e1df906cbd49c5a91
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