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/10.4/sys/net/if_lagg.c 313112 2017-02-02 23:04:01Z asomers $");
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 #include <net/vnet.h>
55
56 #if defined(INET) || defined(INET6)
57 #include <netinet/in.h>
58 #include <netinet/ip.h>
59 #endif
60 #ifdef INET
61 #include <netinet/in_systm.h>
62 #include <netinet/if_ether.h>
63 #endif
64
65 #ifdef INET6
66 #include <netinet/ip6.h>
67 #include <netinet6/in6_var.h>
68 #include <netinet6/in6_ifattach.h>
69 #endif
70
71 #include <net/if_vlan_var.h>
72 #include <net/if_lagg.h>
73 #include <net/ieee8023ad_lacp.h>
74
75 /* Special flags we should propagate to the lagg ports. */
76 static struct {
77 int flag;
78 int (*func)(struct ifnet *, int);
79 } lagg_pflags[] = {
80 {IFF_PROMISC, ifpromisc},
81 {IFF_ALLMULTI, if_allmulti},
82 {0, NULL}
83 };
84
85 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
86 #define V_lagg_list VNET(lagg_list)
87 static VNET_DEFINE(struct mtx, lagg_list_mtx);
88 #define V_lagg_list_mtx VNET(lagg_list_mtx)
89 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \
90 "if_lagg list", NULL, MTX_DEF)
91 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx)
92 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx)
93 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx)
94 eventhandler_tag lagg_detach_cookie = NULL;
95
96 static int lagg_clone_create(struct if_clone *, int, caddr_t);
97 static void lagg_clone_destroy(struct ifnet *);
98 static VNET_DEFINE(struct if_clone *, lagg_cloner);
99 #define V_lagg_cloner VNET(lagg_cloner)
100 static const char laggname[] = "lagg";
101
102 static void lagg_lladdr(struct lagg_softc *, uint8_t *);
103 static void lagg_capabilities(struct lagg_softc *);
104 static void lagg_port_lladdr(struct lagg_port *, uint8_t *);
105 static void lagg_port_setlladdr(void *, int);
106 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
107 static int lagg_port_destroy(struct lagg_port *, int);
108 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
109 static void lagg_linkstate(struct lagg_softc *);
110 static void lagg_port_state(struct ifnet *, int);
111 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
112 static int lagg_port_output(struct ifnet *, struct mbuf *,
113 const struct sockaddr *, struct route *);
114 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
115 #ifdef LAGG_PORT_STACKING
116 static int lagg_port_checkstacking(struct lagg_softc *);
117 #endif
118 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
119 static void lagg_init(void *);
120 static void lagg_stop(struct lagg_softc *);
121 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
122 static int lagg_ether_setmulti(struct lagg_softc *);
123 static int lagg_ether_cmdmulti(struct lagg_port *, int);
124 static int lagg_setflag(struct lagg_port *, int, int,
125 int (*func)(struct ifnet *, int));
126 static int lagg_setflags(struct lagg_port *, int status);
127 static int lagg_transmit(struct ifnet *, struct mbuf *);
128 static void lagg_qflush(struct ifnet *);
129 static int lagg_media_change(struct ifnet *);
130 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
131 static struct lagg_port *lagg_link_active(struct lagg_softc *,
132 struct lagg_port *);
133 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *);
134
135 /* Simple round robin */
136 static void lagg_rr_attach(struct lagg_softc *);
137 static int lagg_rr_detach(struct lagg_softc *);
138 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
139 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
140 struct mbuf *);
141
142 /* Active failover */
143 static void lagg_fail_attach(struct lagg_softc *);
144 static int lagg_fail_detach(struct lagg_softc *);
145 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
146 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
147 struct mbuf *);
148
149 /* Loadbalancing */
150 static void lagg_lb_attach(struct lagg_softc *);
151 static int lagg_lb_detach(struct lagg_softc *);
152 static int lagg_lb_port_create(struct lagg_port *);
153 static void lagg_lb_port_destroy(struct lagg_port *);
154 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
155 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
156 struct mbuf *);
157 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
158
159 /* 802.3ad LACP */
160 static void lagg_lacp_attach(struct lagg_softc *);
161 static int lagg_lacp_detach(struct lagg_softc *);
162 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
163 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
164 struct mbuf *);
165 static void lagg_lacp_lladdr(struct lagg_softc *);
166
167 static void lagg_callout(void *);
168
169 /* lagg protocol table */
170 static const struct lagg_proto {
171 lagg_proto ti_proto;
172 void (*ti_attach)(struct lagg_softc *);
173 } lagg_protos[] = {
174 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach },
175 { LAGG_PROTO_FAILOVER, lagg_fail_attach },
176 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach },
177 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach },
178 { LAGG_PROTO_LACP, lagg_lacp_attach },
179 { LAGG_PROTO_NONE, NULL }
180 };
181
182 SYSCTL_DECL(_net_link);
183 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
184 "Link Aggregation");
185
186 /* Allow input on any failover links */
187 static VNET_DEFINE(int, lagg_failover_rx_all);
188 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
189 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
190 &VNET_NAME(lagg_failover_rx_all), 0,
191 "Accept input from any interface in a failover lagg");
192
193 /* Default value for using M_FLOWID */
194 static VNET_DEFINE(int, def_use_flowid) = 1;
195 #define V_def_use_flowid VNET(def_use_flowid)
196 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN,
197 &VNET_NAME(def_use_flowid), 0,
198 "Default setting for using flow id for load sharing");
199
200 /* Default value for using M_FLOWID */
201 static VNET_DEFINE(int, def_flowid_shift) = 16;
202 #define V_def_flowid_shift VNET(def_flowid_shift)
203 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN,
204 &VNET_NAME(def_flowid_shift), 0,
205 "Default setting for flowid shift for load sharing");
206
207 static void
208 vnet_lagg_init(const void *unused __unused)
209 {
210
211 LAGG_LIST_LOCK_INIT();
212 SLIST_INIT(&V_lagg_list);
213 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
214 lagg_clone_destroy, 0);
215 }
216 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
217 vnet_lagg_init, NULL);
218
219 static void
220 vnet_lagg_uninit(const void *unused __unused)
221 {
222
223 if_clone_detach(V_lagg_cloner);
224 LAGG_LIST_LOCK_DESTROY();
225 }
226 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
227 vnet_lagg_uninit, NULL);
228
229 static int
230 lagg_modevent(module_t mod, int type, void *data)
231 {
232
233 switch (type) {
234 case MOD_LOAD:
235 lagg_input_p = lagg_input;
236 lagg_linkstate_p = lagg_port_state;
237 lagg_detach_cookie = EVENTHANDLER_REGISTER(
238 ifnet_departure_event, lagg_port_ifdetach, NULL,
239 EVENTHANDLER_PRI_ANY);
240 break;
241 case MOD_UNLOAD:
242 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
243 lagg_detach_cookie);
244 lagg_input_p = NULL;
245 lagg_linkstate_p = NULL;
246 break;
247 default:
248 return (EOPNOTSUPP);
249 }
250 return (0);
251 }
252
253 static moduledata_t lagg_mod = {
254 "if_lagg",
255 lagg_modevent,
256 0
257 };
258
259 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
260 MODULE_VERSION(if_lagg, 1);
261
262 /*
263 * This routine is run via an vlan
264 * config EVENT
265 */
266 static void
267 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
268 {
269 struct lagg_softc *sc = ifp->if_softc;
270 struct lagg_port *lp;
271 struct rm_priotracker tracker;
272
273 if (ifp->if_softc != arg) /* Not our event */
274 return;
275
276 LAGG_RLOCK(sc, &tracker);
277 if (!SLIST_EMPTY(&sc->sc_ports)) {
278 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
279 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
280 }
281 LAGG_RUNLOCK(sc, &tracker);
282 }
283
284 /*
285 * This routine is run via an vlan
286 * unconfig EVENT
287 */
288 static void
289 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
290 {
291 struct lagg_softc *sc = ifp->if_softc;
292 struct lagg_port *lp;
293 struct rm_priotracker tracker;
294
295 if (ifp->if_softc != arg) /* Not our event */
296 return;
297
298 LAGG_RLOCK(sc, &tracker);
299 if (!SLIST_EMPTY(&sc->sc_ports)) {
300 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
301 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
302 }
303 LAGG_RUNLOCK(sc, &tracker);
304 }
305
306 static int
307 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
308 {
309 struct lagg_softc *sc;
310 struct ifnet *ifp;
311 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
312 int i;
313
314 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
315 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
316 if (ifp == NULL) {
317 free(sc, M_DEVBUF);
318 return (ENOSPC);
319 }
320
321 sc->sc_ipackets = counter_u64_alloc(M_WAITOK);
322 sc->sc_opackets = counter_u64_alloc(M_WAITOK);
323 sc->sc_ibytes = counter_u64_alloc(M_WAITOK);
324 sc->sc_obytes = counter_u64_alloc(M_WAITOK);
325
326 if (V_def_use_flowid)
327 sc->sc_opts |= LAGG_OPT_USE_FLOWID;
328 sc->flowid_shift = V_def_flowid_shift;
329
330 /* Hash all layers by default */
331 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4;
332
333 sc->sc_proto = LAGG_PROTO_NONE;
334 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) {
335 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) {
336 sc->sc_proto = lagg_protos[i].ti_proto;
337 lagg_protos[i].ti_attach(sc);
338 break;
339 }
340 }
341 LAGG_LOCK_INIT(sc);
342 LAGG_CALLOUT_LOCK_INIT(sc);
343 SLIST_INIT(&sc->sc_ports);
344 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
345
346 /*
347 * This uses the callout lock rather than the rmlock; one can't
348 * hold said rmlock during SWI.
349 */
350 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0);
351
352 /* Initialise pseudo media types */
353 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
354 lagg_media_status);
355 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
356 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
357
358 if_initname(ifp, laggname, unit);
359 ifp->if_softc = sc;
360 ifp->if_transmit = lagg_transmit;
361 ifp->if_qflush = lagg_qflush;
362 ifp->if_init = lagg_init;
363 ifp->if_ioctl = lagg_ioctl;
364 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
365 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
366
367 /*
368 * Attach as an ordinary ethernet device, children will be attached
369 * as special device IFT_IEEE8023ADLAG.
370 */
371 ether_ifattach(ifp, eaddr);
372
373 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
374 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
375 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
376 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
377
378 /* Insert into the global list of laggs */
379 LAGG_LIST_LOCK();
380 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
381 LAGG_LIST_UNLOCK();
382
383 callout_reset(&sc->sc_callout, hz, lagg_callout, sc);
384
385 return (0);
386 }
387
388 static void
389 lagg_clone_destroy(struct ifnet *ifp)
390 {
391 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
392 struct lagg_port *lp;
393
394 LAGG_WLOCK(sc);
395
396 lagg_stop(sc);
397 ifp->if_flags &= ~IFF_UP;
398
399 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
400 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
401
402 /* Shutdown and remove lagg ports */
403 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
404 lagg_port_destroy(lp, 1);
405 /* Unhook the aggregation protocol */
406 if (sc->sc_detach != NULL)
407 (*sc->sc_detach)(sc);
408 else
409 LAGG_WUNLOCK(sc);
410
411 ifmedia_removeall(&sc->sc_media);
412 ether_ifdetach(ifp);
413 if_free(ifp);
414
415 /* This grabs sc_callout_mtx, serialising it correctly */
416 callout_drain(&sc->sc_callout);
417
418 /* At this point it's drained; we can free this */
419 counter_u64_free(sc->sc_ipackets);
420 counter_u64_free(sc->sc_opackets);
421 counter_u64_free(sc->sc_ibytes);
422 counter_u64_free(sc->sc_obytes);
423
424 LAGG_LIST_LOCK();
425 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
426 LAGG_LIST_UNLOCK();
427
428 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
429 LAGG_LOCK_DESTROY(sc);
430 LAGG_CALLOUT_LOCK_DESTROY(sc);
431 free(sc, M_DEVBUF);
432 }
433
434 static void
435 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
436 {
437 struct ifnet *ifp = sc->sc_ifp;
438 struct lagg_port lp;
439
440 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
441 return;
442
443 LAGG_WLOCK_ASSERT(sc);
444 /*
445 * Set the link layer address on the lagg interface.
446 * sc_lladdr() notifies the MAC change to
447 * the aggregation protocol. iflladdr_event handler which
448 * may trigger gratuitous ARPs for INET will be handled in
449 * a taskqueue.
450 */
451 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
452 if (sc->sc_lladdr != NULL)
453 (*sc->sc_lladdr)(sc);
454
455 bzero(&lp, sizeof(lp));
456 lp.lp_ifp = sc->sc_ifp;
457 lp.lp_softc = sc;
458
459 lagg_port_lladdr(&lp, lladdr);
460 }
461
462 static void
463 lagg_capabilities(struct lagg_softc *sc)
464 {
465 struct lagg_port *lp;
466 int cap = ~0, ena = ~0;
467 u_long hwa = ~0UL;
468 struct ifnet_hw_tsomax hw_tsomax;
469
470 LAGG_WLOCK_ASSERT(sc);
471
472 memset(&hw_tsomax, 0, sizeof(hw_tsomax));
473
474 /* Get capabilities from the lagg ports */
475 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
476 cap &= lp->lp_ifp->if_capabilities;
477 ena &= lp->lp_ifp->if_capenable;
478 hwa &= lp->lp_ifp->if_hwassist;
479 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
480 }
481 cap = (cap == ~0 ? 0 : cap);
482 ena = (ena == ~0 ? 0 : ena);
483 hwa = (hwa == ~0 ? 0 : hwa);
484
485 if (sc->sc_ifp->if_capabilities != cap ||
486 sc->sc_ifp->if_capenable != ena ||
487 sc->sc_ifp->if_hwassist != hwa ||
488 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
489 sc->sc_ifp->if_capabilities = cap;
490 sc->sc_ifp->if_capenable = ena;
491 sc->sc_ifp->if_hwassist = hwa;
492 getmicrotime(&sc->sc_ifp->if_lastchange);
493
494 if (sc->sc_ifflags & IFF_DEBUG)
495 if_printf(sc->sc_ifp,
496 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
497 }
498 }
499
500 static void
501 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr)
502 {
503 struct lagg_softc *sc = lp->lp_softc;
504 struct ifnet *ifp = lp->lp_ifp;
505 struct lagg_llq *llq;
506 int pending = 0;
507 int primary;
508
509 LAGG_WLOCK_ASSERT(sc);
510
511 primary = (sc->sc_primary->lp_ifp == ifp) ? 1 : 0;
512 if (primary == 0 && (lp->lp_detaching ||
513 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0))
514 return;
515
516 /* Check to make sure its not already queued to be changed */
517 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
518 if (llq->llq_ifp == ifp) {
519 pending = 1;
520 break;
521 }
522 }
523
524 if (!pending) {
525 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT);
526 if (llq == NULL) /* XXX what to do */
527 return;
528 }
529
530 /* Update the lladdr even if pending, it may have changed */
531 llq->llq_ifp = ifp;
532 llq->llq_primary = primary;
533 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
534
535 if (!pending)
536 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
537
538 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
539 }
540
541 /*
542 * Set the interface MAC address from a taskqueue to avoid a LOR.
543 */
544 static void
545 lagg_port_setlladdr(void *arg, int pending)
546 {
547 struct lagg_softc *sc = (struct lagg_softc *)arg;
548 struct lagg_llq *llq, *head;
549 struct ifnet *ifp;
550 int error;
551
552 /* Grab a local reference of the queue and remove it from the softc */
553 LAGG_WLOCK(sc);
554 head = SLIST_FIRST(&sc->sc_llq_head);
555 SLIST_FIRST(&sc->sc_llq_head) = NULL;
556 LAGG_WUNLOCK(sc);
557
558 /*
559 * Traverse the queue and set the lladdr on each ifp. It is safe to do
560 * unlocked as we have the only reference to it.
561 */
562 for (llq = head; llq != NULL; llq = head) {
563 ifp = llq->llq_ifp;
564
565 CURVNET_SET(ifp->if_vnet);
566 if (llq->llq_primary == 0) {
567 /*
568 * Set the link layer address on the laggport interface.
569 * if_setlladdr() triggers gratuitous ARPs for INET.
570 */
571 error = if_setlladdr(ifp, llq->llq_lladdr,
572 ETHER_ADDR_LEN);
573 if (error)
574 printf("%s: setlladdr failed on %s\n", __func__,
575 ifp->if_xname);
576 } else
577 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
578 CURVNET_RESTORE();
579 head = SLIST_NEXT(llq, llq_entries);
580 free(llq, M_DEVBUF);
581 }
582 }
583
584 static int
585 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
586 {
587 struct lagg_softc *sc_ptr;
588 struct lagg_port *lp, *tlp;
589 int error = 0;
590
591 LAGG_WLOCK_ASSERT(sc);
592
593 /* Limit the maximal number of lagg ports */
594 if (sc->sc_count >= LAGG_MAX_PORTS)
595 return (ENOSPC);
596
597 /* Check if port has already been associated to a lagg */
598 if (ifp->if_lagg != NULL) {
599 /* Port is already in the current lagg? */
600 lp = (struct lagg_port *)ifp->if_lagg;
601 if (lp->lp_softc == sc)
602 return (EEXIST);
603 return (EBUSY);
604 }
605
606 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
607 if (ifp->if_type != IFT_ETHER)
608 return (EPROTONOSUPPORT);
609
610 /* Allow the first Ethernet member to define the MTU */
611 if (SLIST_EMPTY(&sc->sc_ports))
612 sc->sc_ifp->if_mtu = ifp->if_mtu;
613 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
614 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
615 ifp->if_xname);
616 return (EINVAL);
617 }
618
619 if ((lp = malloc(sizeof(struct lagg_port),
620 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
621 return (ENOMEM);
622
623 /* Check if port is a stacked lagg */
624 LAGG_LIST_LOCK();
625 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
626 if (ifp == sc_ptr->sc_ifp) {
627 LAGG_LIST_UNLOCK();
628 free(lp, M_DEVBUF);
629 return (EINVAL);
630 /* XXX disable stacking for the moment, its untested */
631 #ifdef LAGG_PORT_STACKING
632 lp->lp_flags |= LAGG_PORT_STACK;
633 if (lagg_port_checkstacking(sc_ptr) >=
634 LAGG_MAX_STACKING) {
635 LAGG_LIST_UNLOCK();
636 free(lp, M_DEVBUF);
637 return (E2BIG);
638 }
639 #endif
640 }
641 }
642 LAGG_LIST_UNLOCK();
643
644 /* Change the interface type */
645 lp->lp_iftype = ifp->if_type;
646 ifp->if_type = IFT_IEEE8023ADLAG;
647 ifp->if_lagg = lp;
648 lp->lp_ioctl = ifp->if_ioctl;
649 ifp->if_ioctl = lagg_port_ioctl;
650 lp->lp_output = ifp->if_output;
651 ifp->if_output = lagg_port_output;
652
653 lp->lp_ifp = ifp;
654 lp->lp_softc = sc;
655
656 /* Save port link layer address */
657 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
658
659 if (SLIST_EMPTY(&sc->sc_ports)) {
660 sc->sc_primary = lp;
661 lagg_lladdr(sc, IF_LLADDR(ifp));
662 } else {
663 /* Update link layer address for this port */
664 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp));
665 }
666
667 /*
668 * Insert into the list of ports.
669 * Keep ports sorted by if_index. It is handy, when configuration
670 * is predictable and `ifconfig laggN create ...` command
671 * will lead to the same result each time.
672 */
673 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
674 if (tlp->lp_ifp->if_index < ifp->if_index && (
675 SLIST_NEXT(tlp, lp_entries) == NULL ||
676 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index >
677 ifp->if_index))
678 break;
679 }
680 if (tlp != NULL)
681 SLIST_INSERT_AFTER(tlp, lp, lp_entries);
682 else
683 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
684 sc->sc_count++;
685
686 /* Update lagg capabilities */
687 lagg_capabilities(sc);
688 lagg_linkstate(sc);
689
690 /* Add multicast addresses and interface flags to this port */
691 lagg_ether_cmdmulti(lp, 1);
692 lagg_setflags(lp, 1);
693
694 if (sc->sc_port_create != NULL)
695 error = (*sc->sc_port_create)(lp);
696 if (error) {
697 /* remove the port again, without calling sc_port_destroy */
698 lagg_port_destroy(lp, 0);
699 return (error);
700 }
701
702 return (error);
703 }
704
705 #ifdef LAGG_PORT_STACKING
706 static int
707 lagg_port_checkstacking(struct lagg_softc *sc)
708 {
709 struct lagg_softc *sc_ptr;
710 struct lagg_port *lp;
711 int m = 0;
712
713 LAGG_WLOCK_ASSERT(sc);
714
715 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
716 if (lp->lp_flags & LAGG_PORT_STACK) {
717 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
718 m = MAX(m, lagg_port_checkstacking(sc_ptr));
719 }
720 }
721
722 return (m + 1);
723 }
724 #endif
725
726 static int
727 lagg_port_destroy(struct lagg_port *lp, int runpd)
728 {
729 struct lagg_softc *sc = lp->lp_softc;
730 struct lagg_port *lp_ptr;
731 struct lagg_llq *llq;
732 struct ifnet *ifp = lp->lp_ifp;
733
734 LAGG_WLOCK_ASSERT(sc);
735
736 if (runpd && sc->sc_port_destroy != NULL)
737 (*sc->sc_port_destroy)(lp);
738
739 /*
740 * Remove multicast addresses and interface flags from this port and
741 * reset the MAC address, skip if the interface is being detached.
742 */
743 if (!lp->lp_detaching) {
744 lagg_ether_cmdmulti(lp, 0);
745 lagg_setflags(lp, 0);
746 lagg_port_lladdr(lp, lp->lp_lladdr);
747 }
748
749 /* Restore interface */
750 ifp->if_type = lp->lp_iftype;
751 ifp->if_ioctl = lp->lp_ioctl;
752 ifp->if_output = lp->lp_output;
753 ifp->if_lagg = NULL;
754
755 /* Finally, remove the port from the lagg */
756 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
757 sc->sc_count--;
758
759 /* Update the primary interface */
760 if (lp == sc->sc_primary) {
761 uint8_t lladdr[ETHER_ADDR_LEN];
762
763 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) {
764 bzero(&lladdr, ETHER_ADDR_LEN);
765 } else {
766 bcopy(lp_ptr->lp_lladdr,
767 lladdr, ETHER_ADDR_LEN);
768 }
769 lagg_lladdr(sc, lladdr);
770 sc->sc_primary = lp_ptr;
771
772 /* Update link layer address for each port */
773 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
774 lagg_port_lladdr(lp_ptr, lladdr);
775 }
776
777 /* Remove any pending lladdr changes from the queue */
778 if (lp->lp_detaching) {
779 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
780 if (llq->llq_ifp == ifp) {
781 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
782 llq_entries);
783 free(llq, M_DEVBUF);
784 break; /* Only appears once */
785 }
786 }
787 }
788
789 if (lp->lp_ifflags)
790 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
791
792 free(lp, M_DEVBUF);
793
794 /* Update lagg capabilities */
795 lagg_capabilities(sc);
796 lagg_linkstate(sc);
797
798 return (0);
799 }
800
801 static int
802 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
803 {
804 struct lagg_reqport *rp = (struct lagg_reqport *)data;
805 struct lagg_softc *sc;
806 struct lagg_port *lp = NULL;
807 int error = 0;
808 struct rm_priotracker tracker;
809
810 /* Should be checked by the caller */
811 if (ifp->if_type != IFT_IEEE8023ADLAG ||
812 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
813 goto fallback;
814
815 switch (cmd) {
816 case SIOCGLAGGPORT:
817 if (rp->rp_portname[0] == '\0' ||
818 ifunit(rp->rp_portname) != ifp) {
819 error = EINVAL;
820 break;
821 }
822
823 LAGG_RLOCK(sc, &tracker);
824 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
825 error = ENOENT;
826 LAGG_RUNLOCK(sc, &tracker);
827 break;
828 }
829
830 lagg_port2req(lp, rp);
831 LAGG_RUNLOCK(sc, &tracker);
832 break;
833
834 case SIOCSIFCAP:
835 if (lp->lp_ioctl == NULL) {
836 error = EINVAL;
837 break;
838 }
839 error = (*lp->lp_ioctl)(ifp, cmd, data);
840 if (error)
841 break;
842
843 /* Update lagg interface capabilities */
844 LAGG_WLOCK(sc);
845 lagg_capabilities(sc);
846 LAGG_WUNLOCK(sc);
847 break;
848
849 case SIOCSIFMTU:
850 /* Do not allow the MTU to be changed once joined */
851 error = EINVAL;
852 break;
853
854 default:
855 goto fallback;
856 }
857
858 return (error);
859
860 fallback:
861 if (lp != NULL && lp->lp_ioctl != NULL)
862 return ((*lp->lp_ioctl)(ifp, cmd, data));
863
864 return (EINVAL);
865 }
866
867 /*
868 * For direct output to child ports.
869 */
870 static int
871 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
872 const struct sockaddr *dst, struct route *ro)
873 {
874 struct lagg_port *lp = ifp->if_lagg;
875
876 switch (dst->sa_family) {
877 case pseudo_AF_HDRCMPLT:
878 case AF_UNSPEC:
879 return ((*lp->lp_output)(ifp, m, dst, ro));
880 }
881
882 /* drop any other frames */
883 m_freem(m);
884 return (ENETDOWN);
885 }
886
887 static void
888 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
889 {
890 struct lagg_port *lp;
891 struct lagg_softc *sc;
892
893 if ((lp = ifp->if_lagg) == NULL)
894 return;
895 /* If the ifnet is just being renamed, don't do anything. */
896 if (ifp->if_flags & IFF_RENAMING)
897 return;
898
899 sc = lp->lp_softc;
900
901 LAGG_WLOCK(sc);
902 lp->lp_detaching = 1;
903 lagg_port_destroy(lp, 1);
904 LAGG_WUNLOCK(sc);
905 }
906
907 static void
908 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
909 {
910 struct lagg_softc *sc = lp->lp_softc;
911
912 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
913 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
914 rp->rp_prio = lp->lp_prio;
915 rp->rp_flags = lp->lp_flags;
916 if (sc->sc_portreq != NULL)
917 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc);
918
919 /* Add protocol specific flags */
920 switch (sc->sc_proto) {
921 case LAGG_PROTO_FAILOVER:
922 if (lp == sc->sc_primary)
923 rp->rp_flags |= LAGG_PORT_MASTER;
924 if (lp == lagg_link_active(sc, sc->sc_primary))
925 rp->rp_flags |= LAGG_PORT_ACTIVE;
926 break;
927
928 case LAGG_PROTO_ROUNDROBIN:
929 case LAGG_PROTO_LOADBALANCE:
930 case LAGG_PROTO_ETHERCHANNEL:
931 if (LAGG_PORTACTIVE(lp))
932 rp->rp_flags |= LAGG_PORT_ACTIVE;
933 break;
934
935 case LAGG_PROTO_LACP:
936 /* LACP has a different definition of active */
937 if (lacp_isactive(lp))
938 rp->rp_flags |= LAGG_PORT_ACTIVE;
939 if (lacp_iscollecting(lp))
940 rp->rp_flags |= LAGG_PORT_COLLECTING;
941 if (lacp_isdistributing(lp))
942 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
943 break;
944 }
945
946 }
947
948 static void
949 lagg_init(void *xsc)
950 {
951 struct lagg_softc *sc = (struct lagg_softc *)xsc;
952 struct lagg_port *lp;
953 struct ifnet *ifp = sc->sc_ifp;
954
955 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
956 return;
957
958 LAGG_WLOCK(sc);
959
960 ifp->if_drv_flags |= IFF_DRV_RUNNING;
961 /* Update the port lladdrs */
962 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
963 lagg_port_lladdr(lp, IF_LLADDR(ifp));
964
965 if (sc->sc_init != NULL)
966 (*sc->sc_init)(sc);
967
968 LAGG_WUNLOCK(sc);
969 }
970
971 static void
972 lagg_stop(struct lagg_softc *sc)
973 {
974 struct ifnet *ifp = sc->sc_ifp;
975
976 LAGG_WLOCK_ASSERT(sc);
977
978 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
979 return;
980
981 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
982
983 if (sc->sc_stop != NULL)
984 (*sc->sc_stop)(sc);
985 }
986
987 static int
988 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
989 {
990 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
991 struct lagg_reqall *ra = (struct lagg_reqall *)data;
992 struct lagg_reqopts *ro = (struct lagg_reqopts *)data;
993 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
994 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
995 struct ifreq *ifr = (struct ifreq *)data;
996 struct lagg_port *lp;
997 const struct lagg_proto *proto = NULL;
998 struct ifnet *tpif;
999 struct thread *td = curthread;
1000 char *buf, *outbuf;
1001 int count, buflen, len, error = 0;
1002 struct rm_priotracker tracker;
1003
1004 bzero(&rpbuf, sizeof(rpbuf));
1005
1006 switch (cmd) {
1007 case SIOCGLAGG:
1008 LAGG_RLOCK(sc, &tracker);
1009 count = 0;
1010 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1011 count++;
1012 buflen = count * sizeof(struct lagg_reqport);
1013 LAGG_RUNLOCK(sc, &tracker);
1014
1015 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1016
1017 LAGG_RLOCK(sc, &tracker);
1018 ra->ra_proto = sc->sc_proto;
1019 if (sc->sc_req != NULL)
1020 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc);
1021
1022 count = 0;
1023 buf = outbuf;
1024 len = min(ra->ra_size, buflen);
1025 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1026 if (len < sizeof(rpbuf))
1027 break;
1028
1029 lagg_port2req(lp, &rpbuf);
1030 memcpy(buf, &rpbuf, sizeof(rpbuf));
1031 count++;
1032 buf += sizeof(rpbuf);
1033 len -= sizeof(rpbuf);
1034 }
1035 LAGG_RUNLOCK(sc, &tracker);
1036 ra->ra_ports = count;
1037 ra->ra_size = count * sizeof(rpbuf);
1038 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1039 free(outbuf, M_TEMP);
1040 break;
1041 case SIOCSLAGG:
1042 error = priv_check(td, PRIV_NET_LAGG);
1043 if (error)
1044 break;
1045 for (proto = lagg_protos; proto->ti_proto != LAGG_PROTO_NONE;
1046 proto++) {
1047 if (proto->ti_proto == ra->ra_proto) {
1048 if (sc->sc_ifflags & IFF_DEBUG)
1049 printf("%s: using proto %u\n",
1050 sc->sc_ifname, proto->ti_proto);
1051 break;
1052 }
1053 }
1054 if (proto->ti_proto >= LAGG_PROTO_MAX) {
1055 error = EPROTONOSUPPORT;
1056 break;
1057 }
1058 /* Set to LAGG_PROTO_NONE during the attach. */
1059 LAGG_WLOCK(sc);
1060 if (sc->sc_proto != LAGG_PROTO_NONE) {
1061 int (*sc_detach)(struct lagg_softc *sc);
1062
1063 /* Reset protocol and pointers */
1064 sc->sc_proto = LAGG_PROTO_NONE;
1065 sc_detach = sc->sc_detach;
1066 sc->sc_detach = NULL;
1067 sc->sc_start = NULL;
1068 sc->sc_input = NULL;
1069 sc->sc_port_create = NULL;
1070 sc->sc_port_destroy = NULL;
1071 sc->sc_linkstate = NULL;
1072 sc->sc_init = NULL;
1073 sc->sc_stop = NULL;
1074 sc->sc_lladdr = NULL;
1075 sc->sc_req = NULL;
1076 sc->sc_portreq = NULL;
1077
1078 if (sc_detach != NULL)
1079 sc_detach(sc);
1080 else
1081 LAGG_WUNLOCK(sc);
1082 } else
1083 LAGG_WUNLOCK(sc);
1084 if (proto->ti_proto != LAGG_PROTO_NONE)
1085 proto->ti_attach(sc);
1086 LAGG_WLOCK(sc);
1087 sc->sc_proto = proto->ti_proto;
1088 LAGG_WUNLOCK(sc);
1089 break;
1090 case SIOCGLAGGOPTS:
1091 ro->ro_opts = sc->sc_opts;
1092 if (sc->sc_proto == LAGG_PROTO_LACP) {
1093 struct lacp_softc *lsc;
1094
1095 lsc = (struct lacp_softc *)sc->sc_psc;
1096 if (lsc->lsc_debug.lsc_tx_test != 0)
1097 ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
1098 if (lsc->lsc_debug.lsc_rx_test != 0)
1099 ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
1100 if (lsc->lsc_strict_mode != 0)
1101 ro->ro_opts |= LAGG_OPT_LACP_STRICT;
1102 if (lsc->lsc_fast_timeout != 0)
1103 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT;
1104
1105 ro->ro_active = sc->sc_active;
1106 } else {
1107 ro->ro_active = 0;
1108 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1109 ro->ro_active += LAGG_PORTACTIVE(lp);
1110 }
1111 ro->ro_flapping = sc->sc_flapping;
1112 ro->ro_flowid_shift = sc->flowid_shift;
1113 break;
1114 case SIOCSLAGGOPTS:
1115 error = priv_check(td, PRIV_NET_LAGG);
1116 if (error)
1117 break;
1118 if (ro->ro_opts == 0)
1119 break;
1120 /*
1121 * Set options. LACP options are stored in sc->sc_psc,
1122 * not in sc_opts.
1123 */
1124 int valid, lacp;
1125
1126 switch (ro->ro_opts) {
1127 case LAGG_OPT_USE_FLOWID:
1128 case -LAGG_OPT_USE_FLOWID:
1129 case LAGG_OPT_FLOWIDSHIFT:
1130 valid = 1;
1131 lacp = 0;
1132 break;
1133 case LAGG_OPT_LACP_TXTEST:
1134 case -LAGG_OPT_LACP_TXTEST:
1135 case LAGG_OPT_LACP_RXTEST:
1136 case -LAGG_OPT_LACP_RXTEST:
1137 case LAGG_OPT_LACP_STRICT:
1138 case -LAGG_OPT_LACP_STRICT:
1139 case LAGG_OPT_LACP_TIMEOUT:
1140 case -LAGG_OPT_LACP_TIMEOUT:
1141 valid = lacp = 1;
1142 break;
1143 default:
1144 valid = lacp = 0;
1145 break;
1146 }
1147
1148 LAGG_WLOCK(sc);
1149 if (valid == 0 ||
1150 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
1151 /* Invalid combination of options specified. */
1152 error = EINVAL;
1153 LAGG_WUNLOCK(sc);
1154 break; /* Return from SIOCSLAGGOPTS. */
1155 }
1156 /*
1157 * Store new options into sc->sc_opts except for
1158 * FLOWIDSHIFT and LACP options.
1159 */
1160 if (lacp == 0) {
1161 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
1162 sc->flowid_shift = ro->ro_flowid_shift;
1163 else if (ro->ro_opts > 0)
1164 sc->sc_opts |= ro->ro_opts;
1165 else
1166 sc->sc_opts &= ~ro->ro_opts;
1167 } else {
1168 struct lacp_softc *lsc;
1169 struct lacp_port *lp;
1170
1171 lsc = (struct lacp_softc *)sc->sc_psc;
1172
1173 switch (ro->ro_opts) {
1174 case LAGG_OPT_LACP_TXTEST:
1175 lsc->lsc_debug.lsc_tx_test = 1;
1176 break;
1177 case -LAGG_OPT_LACP_TXTEST:
1178 lsc->lsc_debug.lsc_tx_test = 0;
1179 break;
1180 case LAGG_OPT_LACP_RXTEST:
1181 lsc->lsc_debug.lsc_rx_test = 1;
1182 break;
1183 case -LAGG_OPT_LACP_RXTEST:
1184 lsc->lsc_debug.lsc_rx_test = 0;
1185 break;
1186 case LAGG_OPT_LACP_STRICT:
1187 lsc->lsc_strict_mode = 1;
1188 break;
1189 case -LAGG_OPT_LACP_STRICT:
1190 lsc->lsc_strict_mode = 0;
1191 break;
1192 case LAGG_OPT_LACP_TIMEOUT:
1193 LACP_LOCK(lsc);
1194 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1195 lp->lp_state |= LACP_STATE_TIMEOUT;
1196 LACP_UNLOCK(lsc);
1197 lsc->lsc_fast_timeout = 1;
1198 break;
1199 case -LAGG_OPT_LACP_TIMEOUT:
1200 LACP_LOCK(lsc);
1201 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1202 lp->lp_state &= ~LACP_STATE_TIMEOUT;
1203 LACP_UNLOCK(lsc);
1204 lsc->lsc_fast_timeout = 0;
1205 break;
1206 }
1207 }
1208 LAGG_WUNLOCK(sc);
1209 break;
1210 case SIOCGLAGGFLAGS:
1211 rf->rf_flags = sc->sc_flags;
1212 break;
1213 case SIOCSLAGGHASH:
1214 error = priv_check(td, PRIV_NET_LAGG);
1215 if (error)
1216 break;
1217 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1218 error = EINVAL;
1219 break;
1220 }
1221 LAGG_WLOCK(sc);
1222 sc->sc_flags &= ~LAGG_F_HASHMASK;
1223 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK;
1224 LAGG_WUNLOCK(sc);
1225 break;
1226 case SIOCGLAGGPORT:
1227 if (rp->rp_portname[0] == '\0' ||
1228 (tpif = ifunit(rp->rp_portname)) == NULL) {
1229 error = EINVAL;
1230 break;
1231 }
1232
1233 LAGG_RLOCK(sc, &tracker);
1234 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1235 lp->lp_softc != sc) {
1236 error = ENOENT;
1237 LAGG_RUNLOCK(sc, &tracker);
1238 break;
1239 }
1240
1241 lagg_port2req(lp, rp);
1242 LAGG_RUNLOCK(sc, &tracker);
1243 break;
1244 case SIOCSLAGGPORT:
1245 error = priv_check(td, PRIV_NET_LAGG);
1246 if (error)
1247 break;
1248 if (rp->rp_portname[0] == '\0' ||
1249 (tpif = ifunit(rp->rp_portname)) == NULL) {
1250 error = EINVAL;
1251 break;
1252 }
1253 #ifdef INET6
1254 /*
1255 * A laggport interface should not have inet6 address
1256 * because two interfaces with a valid link-local
1257 * scope zone must not be merged in any form. This
1258 * restriction is needed to prevent violation of
1259 * link-local scope zone. Attempts to add a laggport
1260 * interface which has inet6 addresses triggers
1261 * removal of all inet6 addresses on the member
1262 * interface.
1263 */
1264 if (in6ifa_llaonifp(tpif)) {
1265 in6_ifdetach(tpif);
1266 if_printf(sc->sc_ifp,
1267 "IPv6 addresses on %s have been removed "
1268 "before adding it as a member to prevent "
1269 "IPv6 address scope violation.\n",
1270 tpif->if_xname);
1271 }
1272 #endif
1273 LAGG_WLOCK(sc);
1274 error = lagg_port_create(sc, tpif);
1275 LAGG_WUNLOCK(sc);
1276 break;
1277 case SIOCSLAGGDELPORT:
1278 error = priv_check(td, PRIV_NET_LAGG);
1279 if (error)
1280 break;
1281 if (rp->rp_portname[0] == '\0' ||
1282 (tpif = ifunit(rp->rp_portname)) == NULL) {
1283 error = EINVAL;
1284 break;
1285 }
1286
1287 LAGG_WLOCK(sc);
1288 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1289 lp->lp_softc != sc) {
1290 error = ENOENT;
1291 LAGG_WUNLOCK(sc);
1292 break;
1293 }
1294
1295 error = lagg_port_destroy(lp, 1);
1296 LAGG_WUNLOCK(sc);
1297 break;
1298 case SIOCSIFFLAGS:
1299 /* Set flags on ports too */
1300 LAGG_WLOCK(sc);
1301 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1302 lagg_setflags(lp, 1);
1303 }
1304 LAGG_WUNLOCK(sc);
1305
1306 if (!(ifp->if_flags & IFF_UP) &&
1307 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1308 /*
1309 * If interface is marked down and it is running,
1310 * then stop and disable it.
1311 */
1312 LAGG_WLOCK(sc);
1313 lagg_stop(sc);
1314 LAGG_WUNLOCK(sc);
1315 } else if ((ifp->if_flags & IFF_UP) &&
1316 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1317 /*
1318 * If interface is marked up and it is stopped, then
1319 * start it.
1320 */
1321 (*ifp->if_init)(sc);
1322 }
1323 break;
1324 case SIOCADDMULTI:
1325 case SIOCDELMULTI:
1326 LAGG_WLOCK(sc);
1327 error = lagg_ether_setmulti(sc);
1328 LAGG_WUNLOCK(sc);
1329 break;
1330 case SIOCSIFMEDIA:
1331 case SIOCGIFMEDIA:
1332 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1333 break;
1334
1335 case SIOCSIFCAP:
1336 case SIOCSIFMTU:
1337 /* Do not allow the MTU or caps to be directly changed */
1338 error = EINVAL;
1339 break;
1340
1341 default:
1342 error = ether_ioctl(ifp, cmd, data);
1343 break;
1344 }
1345 return (error);
1346 }
1347
1348 static int
1349 lagg_ether_setmulti(struct lagg_softc *sc)
1350 {
1351 struct lagg_port *lp;
1352
1353 LAGG_WLOCK_ASSERT(sc);
1354
1355 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1356 /* First, remove any existing filter entries. */
1357 lagg_ether_cmdmulti(lp, 0);
1358 /* copy all addresses from the lagg interface to the port */
1359 lagg_ether_cmdmulti(lp, 1);
1360 }
1361 return (0);
1362 }
1363
1364 static int
1365 lagg_ether_cmdmulti(struct lagg_port *lp, int set)
1366 {
1367 struct lagg_softc *sc = lp->lp_softc;
1368 struct ifnet *ifp = lp->lp_ifp;
1369 struct ifnet *scifp = sc->sc_ifp;
1370 struct lagg_mc *mc;
1371 struct ifmultiaddr *ifma;
1372 int error;
1373
1374 LAGG_WLOCK_ASSERT(sc);
1375
1376 if (set) {
1377 IF_ADDR_WLOCK(scifp);
1378 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
1379 if (ifma->ifma_addr->sa_family != AF_LINK)
1380 continue;
1381 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
1382 if (mc == NULL) {
1383 IF_ADDR_WUNLOCK(scifp);
1384 return (ENOMEM);
1385 }
1386 bcopy(ifma->ifma_addr, &mc->mc_addr,
1387 ifma->ifma_addr->sa_len);
1388 mc->mc_addr.sdl_index = ifp->if_index;
1389 mc->mc_ifma = NULL;
1390 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
1391 }
1392 IF_ADDR_WUNLOCK(scifp);
1393 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
1394 error = if_addmulti(ifp,
1395 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
1396 if (error)
1397 return (error);
1398 }
1399 } else {
1400 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
1401 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
1402 if (mc->mc_ifma && !lp->lp_detaching)
1403 if_delmulti_ifma(mc->mc_ifma);
1404 free(mc, M_DEVBUF);
1405 }
1406 }
1407 return (0);
1408 }
1409
1410 /* Handle a ref counted flag that should be set on the lagg port as well */
1411 static int
1412 lagg_setflag(struct lagg_port *lp, int flag, int status,
1413 int (*func)(struct ifnet *, int))
1414 {
1415 struct lagg_softc *sc = lp->lp_softc;
1416 struct ifnet *scifp = sc->sc_ifp;
1417 struct ifnet *ifp = lp->lp_ifp;
1418 int error;
1419
1420 LAGG_WLOCK_ASSERT(sc);
1421
1422 status = status ? (scifp->if_flags & flag) : 0;
1423 /* Now "status" contains the flag value or 0 */
1424
1425 /*
1426 * See if recorded ports status is different from what
1427 * we want it to be. If it is, flip it. We record ports
1428 * status in lp_ifflags so that we won't clear ports flag
1429 * we haven't set. In fact, we don't clear or set ports
1430 * flags directly, but get or release references to them.
1431 * That's why we can be sure that recorded flags still are
1432 * in accord with actual ports flags.
1433 */
1434 if (status != (lp->lp_ifflags & flag)) {
1435 error = (*func)(ifp, status);
1436 if (error)
1437 return (error);
1438 lp->lp_ifflags &= ~flag;
1439 lp->lp_ifflags |= status;
1440 }
1441 return (0);
1442 }
1443
1444 /*
1445 * Handle IFF_* flags that require certain changes on the lagg port
1446 * if "status" is true, update ports flags respective to the lagg
1447 * if "status" is false, forcedly clear the flags set on port.
1448 */
1449 static int
1450 lagg_setflags(struct lagg_port *lp, int status)
1451 {
1452 int error, i;
1453
1454 for (i = 0; lagg_pflags[i].flag; i++) {
1455 error = lagg_setflag(lp, lagg_pflags[i].flag,
1456 status, lagg_pflags[i].func);
1457 if (error)
1458 return (error);
1459 }
1460 return (0);
1461 }
1462
1463 static int
1464 lagg_transmit(struct ifnet *ifp, struct mbuf *m)
1465 {
1466 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1467 int error, len, mcast;
1468 struct rm_priotracker tracker;
1469
1470 len = m->m_pkthdr.len;
1471 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
1472
1473 LAGG_RLOCK(sc, &tracker);
1474 /* We need a Tx algorithm and at least one port */
1475 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
1476 LAGG_RUNLOCK(sc, &tracker);
1477 m_freem(m);
1478 ifp->if_oerrors++;
1479 return (ENXIO);
1480 }
1481
1482 ETHER_BPF_MTAP(ifp, m);
1483
1484 error = (*sc->sc_start)(sc, m);
1485 LAGG_RUNLOCK(sc, &tracker);
1486
1487 if (error == 0) {
1488 counter_u64_add(sc->sc_opackets, 1);
1489 counter_u64_add(sc->sc_obytes, len);
1490 ifp->if_omcasts += mcast;
1491 } else
1492 ifp->if_oerrors++;
1493
1494 return (error);
1495 }
1496
1497 /*
1498 * The ifp->if_qflush entry point for lagg(4) is no-op.
1499 */
1500 static void
1501 lagg_qflush(struct ifnet *ifp __unused)
1502 {
1503 }
1504
1505 static struct mbuf *
1506 lagg_input(struct ifnet *ifp, struct mbuf *m)
1507 {
1508 struct lagg_port *lp = ifp->if_lagg;
1509 struct lagg_softc *sc = lp->lp_softc;
1510 struct ifnet *scifp = sc->sc_ifp;
1511 struct rm_priotracker tracker;
1512
1513 LAGG_RLOCK(sc, &tracker);
1514 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1515 (lp->lp_flags & LAGG_PORT_DISABLED) ||
1516 sc->sc_proto == LAGG_PROTO_NONE) {
1517 LAGG_RUNLOCK(sc, &tracker);
1518 m_freem(m);
1519 return (NULL);
1520 }
1521
1522 ETHER_BPF_MTAP(scifp, m);
1523
1524 m = (lp->lp_detaching == 0) ? (*sc->sc_input)(sc, lp, m) : NULL;
1525
1526 if (m != NULL) {
1527 counter_u64_add(sc->sc_ipackets, 1);
1528 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len);
1529
1530 if (scifp->if_flags & IFF_MONITOR) {
1531 m_freem(m);
1532 m = NULL;
1533 }
1534 }
1535
1536 LAGG_RUNLOCK(sc, &tracker);
1537 return (m);
1538 }
1539
1540 static int
1541 lagg_media_change(struct ifnet *ifp)
1542 {
1543 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1544
1545 if (sc->sc_ifflags & IFF_DEBUG)
1546 printf("%s\n", __func__);
1547
1548 /* Ignore */
1549 return (0);
1550 }
1551
1552 static void
1553 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1554 {
1555 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1556 struct lagg_port *lp;
1557 struct rm_priotracker tracker;
1558
1559 imr->ifm_status = IFM_AVALID;
1560 imr->ifm_active = IFM_ETHER | IFM_AUTO;
1561
1562 LAGG_RLOCK(sc, &tracker);
1563 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1564 if (LAGG_PORTACTIVE(lp))
1565 imr->ifm_status |= IFM_ACTIVE;
1566 }
1567 LAGG_RUNLOCK(sc, &tracker);
1568 }
1569
1570 static void
1571 lagg_linkstate(struct lagg_softc *sc)
1572 {
1573 struct lagg_port *lp;
1574 int new_link = LINK_STATE_DOWN;
1575 uint64_t speed;
1576
1577 /* Our link is considered up if at least one of our ports is active */
1578 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1579 if (lp->lp_link_state == LINK_STATE_UP) {
1580 new_link = LINK_STATE_UP;
1581 break;
1582 }
1583 }
1584 if_link_state_change(sc->sc_ifp, new_link);
1585
1586 /* Update if_baudrate to reflect the max possible speed */
1587 switch (sc->sc_proto) {
1588 case LAGG_PROTO_FAILOVER:
1589 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
1590 sc->sc_primary->lp_ifp->if_baudrate : 0;
1591 break;
1592 case LAGG_PROTO_ROUNDROBIN:
1593 case LAGG_PROTO_LOADBALANCE:
1594 case LAGG_PROTO_ETHERCHANNEL:
1595 speed = 0;
1596 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1597 speed += lp->lp_ifp->if_baudrate;
1598 sc->sc_ifp->if_baudrate = speed;
1599 break;
1600 case LAGG_PROTO_LACP:
1601 /* LACP updates if_baudrate itself */
1602 break;
1603 }
1604 }
1605
1606 static void
1607 lagg_port_state(struct ifnet *ifp, int state)
1608 {
1609 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
1610 struct lagg_softc *sc = NULL;
1611
1612 if (lp != NULL)
1613 sc = lp->lp_softc;
1614 if (sc == NULL)
1615 return;
1616
1617 LAGG_WLOCK(sc);
1618 lagg_linkstate(sc);
1619 if (sc->sc_linkstate != NULL)
1620 (*sc->sc_linkstate)(lp);
1621 LAGG_WUNLOCK(sc);
1622 }
1623
1624 struct lagg_port *
1625 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
1626 {
1627 struct lagg_port *lp_next, *rval = NULL;
1628 // int new_link = LINK_STATE_DOWN;
1629
1630 LAGG_RLOCK_ASSERT(sc);
1631 /*
1632 * Search a port which reports an active link state.
1633 */
1634
1635 if (lp == NULL)
1636 goto search;
1637 if (LAGG_PORTACTIVE(lp)) {
1638 rval = lp;
1639 goto found;
1640 }
1641 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
1642 LAGG_PORTACTIVE(lp_next)) {
1643 rval = lp_next;
1644 goto found;
1645 }
1646
1647 search:
1648 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1649 if (LAGG_PORTACTIVE(lp_next)) {
1650 rval = lp_next;
1651 goto found;
1652 }
1653 }
1654
1655 found:
1656 if (rval != NULL) {
1657 /*
1658 * The IEEE 802.1D standard assumes that a lagg with
1659 * multiple ports is always full duplex. This is valid
1660 * for load sharing laggs and if at least two links
1661 * are active. Unfortunately, checking the latter would
1662 * be too expensive at this point.
1663 XXX
1664 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
1665 (sc->sc_count > 1))
1666 new_link = LINK_STATE_FULL_DUPLEX;
1667 else
1668 new_link = rval->lp_link_state;
1669 */
1670 }
1671
1672 return (rval);
1673 }
1674
1675 static const void *
1676 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf)
1677 {
1678 if (m->m_pkthdr.len < (off + len)) {
1679 return (NULL);
1680 } else if (m->m_len < (off + len)) {
1681 m_copydata(m, off, len, buf);
1682 return (buf);
1683 }
1684 return (mtod(m, char *) + off);
1685 }
1686
1687 uint32_t
1688 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key)
1689 {
1690 uint16_t etype;
1691 uint32_t p = key;
1692 int off;
1693 struct ether_header *eh;
1694 const struct ether_vlan_header *vlan;
1695 #ifdef INET
1696 const struct ip *ip;
1697 const uint32_t *ports;
1698 int iphlen;
1699 #endif
1700 #ifdef INET6
1701 const struct ip6_hdr *ip6;
1702 uint32_t flow;
1703 #endif
1704 union {
1705 #ifdef INET
1706 struct ip ip;
1707 #endif
1708 #ifdef INET6
1709 struct ip6_hdr ip6;
1710 #endif
1711 struct ether_vlan_header vlan;
1712 uint32_t port;
1713 } buf;
1714
1715
1716 off = sizeof(*eh);
1717 if (m->m_len < off)
1718 goto out;
1719 eh = mtod(m, struct ether_header *);
1720 etype = ntohs(eh->ether_type);
1721 if (sc->sc_flags & LAGG_F_HASHL2) {
1722 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p);
1723 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p);
1724 }
1725
1726 /* Special handling for encapsulating VLAN frames */
1727 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) {
1728 p = hash32_buf(&m->m_pkthdr.ether_vtag,
1729 sizeof(m->m_pkthdr.ether_vtag), p);
1730 } else if (etype == ETHERTYPE_VLAN) {
1731 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf);
1732 if (vlan == NULL)
1733 goto out;
1734
1735 if (sc->sc_flags & LAGG_F_HASHL2)
1736 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p);
1737 etype = ntohs(vlan->evl_proto);
1738 off += sizeof(*vlan) - sizeof(*eh);
1739 }
1740
1741 switch (etype) {
1742 #ifdef INET
1743 case ETHERTYPE_IP:
1744 ip = lagg_gethdr(m, off, sizeof(*ip), &buf);
1745 if (ip == NULL)
1746 goto out;
1747
1748 if (sc->sc_flags & LAGG_F_HASHL3) {
1749 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p);
1750 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p);
1751 }
1752 if (!(sc->sc_flags & LAGG_F_HASHL4))
1753 break;
1754 switch (ip->ip_p) {
1755 case IPPROTO_TCP:
1756 case IPPROTO_UDP:
1757 case IPPROTO_SCTP:
1758 iphlen = ip->ip_hl << 2;
1759 if (iphlen < sizeof(*ip))
1760 break;
1761 off += iphlen;
1762 ports = lagg_gethdr(m, off, sizeof(*ports), &buf);
1763 if (ports == NULL)
1764 break;
1765 p = hash32_buf(ports, sizeof(*ports), p);
1766 break;
1767 }
1768 break;
1769 #endif
1770 #ifdef INET6
1771 case ETHERTYPE_IPV6:
1772 if (!(sc->sc_flags & LAGG_F_HASHL3))
1773 break;
1774 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf);
1775 if (ip6 == NULL)
1776 goto out;
1777
1778 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p);
1779 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p);
1780 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
1781 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */
1782 break;
1783 #endif
1784 }
1785 out:
1786 return (p);
1787 }
1788
1789 int
1790 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
1791 {
1792
1793 return (ifp->if_transmit)(ifp, m);
1794 }
1795
1796 /*
1797 * Simple round robin aggregation
1798 */
1799 static void
1800 lagg_rr_attach(struct lagg_softc *sc)
1801 {
1802 sc->sc_detach = lagg_rr_detach;
1803 sc->sc_start = lagg_rr_start;
1804 sc->sc_input = lagg_rr_input;
1805 sc->sc_detach = NULL;
1806 sc->sc_port_create = NULL;
1807 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1808 sc->sc_seq = 0;
1809 }
1810
1811 static int
1812 lagg_rr_detach(struct lagg_softc *sc)
1813 {
1814 return (0);
1815 }
1816
1817 static int
1818 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
1819 {
1820 struct lagg_port *lp;
1821 uint32_t p;
1822
1823 p = atomic_fetchadd_32(&sc->sc_seq, 1);
1824 p %= sc->sc_count;
1825 lp = SLIST_FIRST(&sc->sc_ports);
1826 while (p--)
1827 lp = SLIST_NEXT(lp, lp_entries);
1828
1829 /*
1830 * Check the port's link state. This will return the next active
1831 * port if the link is down or the port is NULL.
1832 */
1833 if ((lp = lagg_link_active(sc, lp)) == NULL) {
1834 m_freem(m);
1835 return (ENETDOWN);
1836 }
1837
1838 /* Send mbuf */
1839 return (lagg_enqueue(lp->lp_ifp, m));
1840 }
1841
1842 static struct mbuf *
1843 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1844 {
1845 struct ifnet *ifp = sc->sc_ifp;
1846
1847 /* Just pass in the packet to our lagg device */
1848 m->m_pkthdr.rcvif = ifp;
1849
1850 return (m);
1851 }
1852
1853 /*
1854 * Active failover
1855 */
1856 static void
1857 lagg_fail_attach(struct lagg_softc *sc)
1858 {
1859 sc->sc_detach = lagg_fail_detach;
1860 sc->sc_start = lagg_fail_start;
1861 sc->sc_input = lagg_fail_input;
1862 sc->sc_port_create = NULL;
1863 sc->sc_port_destroy = NULL;
1864 sc->sc_detach = NULL;
1865 }
1866
1867 static int
1868 lagg_fail_detach(struct lagg_softc *sc)
1869 {
1870 return (0);
1871 }
1872
1873 static int
1874 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
1875 {
1876 struct lagg_port *lp;
1877
1878 /* Use the master port if active or the next available port */
1879 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
1880 m_freem(m);
1881 return (ENETDOWN);
1882 }
1883
1884 /* Send mbuf */
1885 return (lagg_enqueue(lp->lp_ifp, m));
1886 }
1887
1888 static struct mbuf *
1889 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
1890 {
1891 struct ifnet *ifp = sc->sc_ifp;
1892 struct lagg_port *tmp_tp;
1893
1894 if (lp == sc->sc_primary || V_lagg_failover_rx_all) {
1895 m->m_pkthdr.rcvif = ifp;
1896 return (m);
1897 }
1898
1899 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
1900 tmp_tp = lagg_link_active(sc, sc->sc_primary);
1901 /*
1902 * If tmp_tp is null, we've recieved a packet when all
1903 * our links are down. Weird, but process it anyways.
1904 */
1905 if ((tmp_tp == NULL || tmp_tp == lp)) {
1906 m->m_pkthdr.rcvif = ifp;
1907 return (m);
1908 }
1909 }
1910
1911 m_freem(m);
1912 return (NULL);
1913 }
1914
1915 /*
1916 * Loadbalancing
1917 */
1918 static void
1919 lagg_lb_attach(struct lagg_softc *sc)
1920 {
1921 struct lagg_port *lp;
1922 struct lagg_lb *lb;
1923
1924 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO);
1925
1926 sc->sc_detach = lagg_lb_detach;
1927 sc->sc_start = lagg_lb_start;
1928 sc->sc_input = lagg_lb_input;
1929 sc->sc_port_create = lagg_lb_port_create;
1930 sc->sc_port_destroy = lagg_lb_port_destroy;
1931 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
1932
1933 lb->lb_key = arc4random();
1934 sc->sc_psc = (caddr_t)lb;
1935
1936 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1937 lagg_lb_port_create(lp);
1938 }
1939
1940 static int
1941 lagg_lb_detach(struct lagg_softc *sc)
1942 {
1943 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1944 LAGG_WUNLOCK(sc);
1945 if (lb != NULL)
1946 free(lb, M_DEVBUF);
1947 return (0);
1948 }
1949
1950 static int
1951 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
1952 {
1953 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1954 struct lagg_port *lp_next;
1955 int i = 0;
1956
1957 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
1958 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
1959 if (lp_next == lp)
1960 continue;
1961 if (i >= LAGG_MAX_PORTS)
1962 return (EINVAL);
1963 if (sc->sc_ifflags & IFF_DEBUG)
1964 printf("%s: port %s at index %d\n",
1965 sc->sc_ifname, lp_next->lp_ifname, i);
1966 lb->lb_ports[i++] = lp_next;
1967 }
1968
1969 return (0);
1970 }
1971
1972 static int
1973 lagg_lb_port_create(struct lagg_port *lp)
1974 {
1975 struct lagg_softc *sc = lp->lp_softc;
1976 return (lagg_lb_porttable(sc, NULL));
1977 }
1978
1979 static void
1980 lagg_lb_port_destroy(struct lagg_port *lp)
1981 {
1982 struct lagg_softc *sc = lp->lp_softc;
1983 lagg_lb_porttable(sc, lp);
1984 }
1985
1986 static int
1987 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
1988 {
1989 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
1990 struct lagg_port *lp = NULL;
1991 uint32_t p = 0;
1992
1993 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
1994 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
1995 p = m->m_pkthdr.flowid >> sc->flowid_shift;
1996 else
1997 p = lagg_hashmbuf(sc, m, lb->lb_key);
1998 p %= sc->sc_count;
1999 lp = lb->lb_ports[p];
2000
2001 /*
2002 * Check the port's link state. This will return the next active
2003 * port if the link is down or the port is NULL.
2004 */
2005 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2006 m_freem(m);
2007 return (ENETDOWN);
2008 }
2009
2010 /* Send mbuf */
2011 return (lagg_enqueue(lp->lp_ifp, m));
2012 }
2013
2014 static struct mbuf *
2015 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2016 {
2017 struct ifnet *ifp = sc->sc_ifp;
2018
2019 /* Just pass in the packet to our lagg device */
2020 m->m_pkthdr.rcvif = ifp;
2021
2022 return (m);
2023 }
2024
2025 /*
2026 * 802.3ad LACP
2027 */
2028 static void
2029 lagg_lacp_attach(struct lagg_softc *sc)
2030 {
2031 struct lagg_port *lp;
2032
2033 sc->sc_detach = lagg_lacp_detach;
2034 sc->sc_port_create = lacp_port_create;
2035 sc->sc_port_destroy = lacp_port_destroy;
2036 sc->sc_linkstate = lacp_linkstate;
2037 sc->sc_start = lagg_lacp_start;
2038 sc->sc_input = lagg_lacp_input;
2039 sc->sc_init = lacp_init;
2040 sc->sc_stop = lacp_stop;
2041 sc->sc_lladdr = lagg_lacp_lladdr;
2042 sc->sc_req = lacp_req;
2043 sc->sc_portreq = lacp_portreq;
2044
2045 lacp_attach(sc);
2046
2047 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2048 lacp_port_create(lp);
2049 }
2050
2051 static int
2052 lagg_lacp_detach(struct lagg_softc *sc)
2053 {
2054 struct lagg_port *lp;
2055 void *psc;
2056
2057 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2058 lacp_port_destroy(lp);
2059
2060 psc = sc->sc_psc;
2061 sc->sc_psc = NULL;
2062 LAGG_WUNLOCK(sc);
2063
2064 lacp_detach(psc);
2065
2066 return (0);
2067 }
2068
2069 static void
2070 lagg_lacp_lladdr(struct lagg_softc *sc)
2071 {
2072 struct lagg_port *lp;
2073
2074 /* purge all the lacp ports */
2075 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2076 lacp_port_destroy(lp);
2077
2078 /* add them back in */
2079 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2080 lacp_port_create(lp);
2081 }
2082
2083 static int
2084 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
2085 {
2086 struct lagg_port *lp;
2087
2088 lp = lacp_select_tx_port(sc, m);
2089 if (lp == NULL) {
2090 m_freem(m);
2091 return (ENETDOWN);
2092 }
2093
2094 /* Send mbuf */
2095 return (lagg_enqueue(lp->lp_ifp, m));
2096 }
2097
2098 static struct mbuf *
2099 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2100 {
2101 struct ifnet *ifp = sc->sc_ifp;
2102 struct ether_header *eh;
2103 u_short etype;
2104
2105 eh = mtod(m, struct ether_header *);
2106 etype = ntohs(eh->ether_type);
2107
2108 /* Tap off LACP control messages */
2109 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
2110 m = lacp_input(lp, m);
2111 if (m == NULL)
2112 return (NULL);
2113 }
2114
2115 /*
2116 * If the port is not collecting or not in the active aggregator then
2117 * free and return.
2118 */
2119 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
2120 m_freem(m);
2121 return (NULL);
2122 }
2123
2124 m->m_pkthdr.rcvif = ifp;
2125 return (m);
2126 }
2127
2128 static void
2129 lagg_callout(void *arg)
2130 {
2131 struct lagg_softc *sc = (struct lagg_softc *)arg;
2132 struct ifnet *ifp = sc->sc_ifp;
2133
2134 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets);
2135 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets);
2136 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes);
2137 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes);
2138
2139 callout_reset(&sc->sc_callout, hz, lagg_callout, sc);
2140 }
Cache object: 33247b955c336e2489123dec76aee909
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