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 * Copyright (c) 2014, 2016 Marcelo Araujo <araujo@FreeBSD.org>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21 #include "opt_inet.h"
22 #include "opt_inet6.h"
23 #include "opt_kern_tls.h"
24 #include "opt_ratelimit.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/lock.h>
39 #include <sys/rmlock.h>
40 #include <sys/sx.h>
41 #include <sys/taskqueue.h>
42 #include <sys/eventhandler.h>
43
44 #include <net/ethernet.h>
45 #include <net/if.h>
46 #include <net/if_clone.h>
47 #include <net/if_arp.h>
48 #include <net/if_dl.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 #include <net/if_var.h>
52 #include <net/if_private.h>
53 #include <net/bpf.h>
54 #include <net/route.h>
55 #include <net/vnet.h>
56 #include <net/infiniband.h>
57
58 #if defined(INET) || defined(INET6)
59 #include <netinet/in.h>
60 #include <netinet/ip.h>
61 #endif
62 #ifdef INET
63 #include <netinet/in_systm.h>
64 #include <netinet/if_ether.h>
65 #endif
66
67 #ifdef INET6
68 #include <netinet/ip6.h>
69 #include <netinet6/in6_var.h>
70 #include <netinet6/in6_ifattach.h>
71 #endif
72
73 #include <net/if_vlan_var.h>
74 #include <net/if_lagg.h>
75 #include <net/ieee8023ad_lacp.h>
76
77 #ifdef DEV_NETMAP
78 MODULE_DEPEND(if_lagg, netmap, 1, 1, 1);
79 #endif
80
81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx")
82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx)
83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx)
84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx)
85 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED)
86 #define LAGG_SLOCK(_sc) sx_slock(&(_sc)->sc_sx)
87 #define LAGG_SUNLOCK(_sc) sx_sunlock(&(_sc)->sc_sx)
88 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED)
89
90 /* Special flags we should propagate to the lagg ports. */
91 static struct {
92 int flag;
93 int (*func)(struct ifnet *, int);
94 } lagg_pflags[] = {
95 {IFF_PROMISC, ifpromisc},
96 {IFF_ALLMULTI, if_allmulti},
97 {0, NULL}
98 };
99
100 struct lagg_snd_tag {
101 struct m_snd_tag com;
102 struct m_snd_tag *tag;
103 };
104
105 VNET_DEFINE_STATIC(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
106 #define V_lagg_list VNET(lagg_list)
107 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx);
108 #define V_lagg_list_mtx VNET(lagg_list_mtx)
109 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \
110 "if_lagg list", NULL, MTX_DEF)
111 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx)
112 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx)
113 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx)
114 static eventhandler_tag lagg_detach_cookie = NULL;
115
116 static int lagg_clone_create(struct if_clone *, char *, size_t,
117 struct ifc_data *, struct ifnet **);
118 static int lagg_clone_destroy(struct if_clone *, struct ifnet *, uint32_t);
119 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner);
120 #define V_lagg_cloner VNET(lagg_cloner)
121 static const char laggname[] = "lagg";
122 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface");
123
124 static void lagg_capabilities(struct lagg_softc *);
125 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
126 static int lagg_port_destroy(struct lagg_port *, int);
127 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *);
128 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *);
129 static void lagg_linkstate(struct lagg_softc *);
130 static void lagg_port_state(struct ifnet *, int);
131 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
132 static int lagg_port_output(struct ifnet *, struct mbuf *,
133 const struct sockaddr *, struct route *);
134 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
135 #ifdef LAGG_PORT_STACKING
136 static int lagg_port_checkstacking(struct lagg_softc *);
137 #endif
138 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
139 static void lagg_if_updown(struct lagg_softc *, bool);
140 static void lagg_init(void *);
141 static void lagg_stop(struct lagg_softc *);
142 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
143 #if defined(KERN_TLS) || defined(RATELIMIT)
144 static int lagg_snd_tag_alloc(struct ifnet *,
145 union if_snd_tag_alloc_params *,
146 struct m_snd_tag **);
147 static int lagg_snd_tag_modify(struct m_snd_tag *,
148 union if_snd_tag_modify_params *);
149 static int lagg_snd_tag_query(struct m_snd_tag *,
150 union if_snd_tag_query_params *);
151 static void lagg_snd_tag_free(struct m_snd_tag *);
152 static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *);
153 static void lagg_ratelimit_query(struct ifnet *,
154 struct if_ratelimit_query_results *);
155 #endif
156 static int lagg_setmulti(struct lagg_port *);
157 static int lagg_clrmulti(struct lagg_port *);
158 static void lagg_setcaps(struct lagg_port *, int cap, int cap2);
159 static int lagg_setflag(struct lagg_port *, int, int,
160 int (*func)(struct ifnet *, int));
161 static int lagg_setflags(struct lagg_port *, int status);
162 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt);
163 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *);
164 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *);
165 static void lagg_qflush(struct ifnet *);
166 static int lagg_media_change(struct ifnet *);
167 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
168 static struct lagg_port *lagg_link_active(struct lagg_softc *,
169 struct lagg_port *);
170
171 /* Simple round robin */
172 static void lagg_rr_attach(struct lagg_softc *);
173 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
174
175 /* Active failover */
176 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
177 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
178 struct mbuf *);
179
180 /* Loadbalancing */
181 static void lagg_lb_attach(struct lagg_softc *);
182 static void lagg_lb_detach(struct lagg_softc *);
183 static int lagg_lb_port_create(struct lagg_port *);
184 static void lagg_lb_port_destroy(struct lagg_port *);
185 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
186 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
187
188 /* Broadcast */
189 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *);
190
191 /* 802.3ad LACP */
192 static void lagg_lacp_attach(struct lagg_softc *);
193 static void lagg_lacp_detach(struct lagg_softc *);
194 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
195 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
196 struct mbuf *);
197 static void lagg_lacp_lladdr(struct lagg_softc *);
198
199 /* Default input */
200 static struct mbuf *lagg_default_input(struct lagg_softc *, struct lagg_port *,
201 struct mbuf *);
202
203 /* lagg protocol table */
204 static const struct lagg_proto {
205 lagg_proto pr_num;
206 void (*pr_attach)(struct lagg_softc *);
207 void (*pr_detach)(struct lagg_softc *);
208 int (*pr_start)(struct lagg_softc *, struct mbuf *);
209 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *,
210 struct mbuf *);
211 int (*pr_addport)(struct lagg_port *);
212 void (*pr_delport)(struct lagg_port *);
213 void (*pr_linkstate)(struct lagg_port *);
214 void (*pr_init)(struct lagg_softc *);
215 void (*pr_stop)(struct lagg_softc *);
216 void (*pr_lladdr)(struct lagg_softc *);
217 void (*pr_request)(struct lagg_softc *, void *);
218 void (*pr_portreq)(struct lagg_port *, void *);
219 } lagg_protos[] = {
220 {
221 .pr_num = LAGG_PROTO_NONE
222 },
223 {
224 .pr_num = LAGG_PROTO_ROUNDROBIN,
225 .pr_attach = lagg_rr_attach,
226 .pr_start = lagg_rr_start,
227 .pr_input = lagg_default_input,
228 },
229 {
230 .pr_num = LAGG_PROTO_FAILOVER,
231 .pr_start = lagg_fail_start,
232 .pr_input = lagg_fail_input,
233 },
234 {
235 .pr_num = LAGG_PROTO_LOADBALANCE,
236 .pr_attach = lagg_lb_attach,
237 .pr_detach = lagg_lb_detach,
238 .pr_start = lagg_lb_start,
239 .pr_input = lagg_default_input,
240 .pr_addport = lagg_lb_port_create,
241 .pr_delport = lagg_lb_port_destroy,
242 },
243 {
244 .pr_num = LAGG_PROTO_LACP,
245 .pr_attach = lagg_lacp_attach,
246 .pr_detach = lagg_lacp_detach,
247 .pr_start = lagg_lacp_start,
248 .pr_input = lagg_lacp_input,
249 .pr_addport = lacp_port_create,
250 .pr_delport = lacp_port_destroy,
251 .pr_linkstate = lacp_linkstate,
252 .pr_init = lacp_init,
253 .pr_stop = lacp_stop,
254 .pr_lladdr = lagg_lacp_lladdr,
255 .pr_request = lacp_req,
256 .pr_portreq = lacp_portreq,
257 },
258 {
259 .pr_num = LAGG_PROTO_BROADCAST,
260 .pr_start = lagg_bcast_start,
261 .pr_input = lagg_default_input,
262 },
263 };
264
265 SYSCTL_DECL(_net_link);
266 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
267 "Link Aggregation");
268
269 /* Allow input on any failover links */
270 VNET_DEFINE_STATIC(int, lagg_failover_rx_all);
271 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
272 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
273 &VNET_NAME(lagg_failover_rx_all), 0,
274 "Accept input from any interface in a failover lagg");
275
276 /* Default value for using flowid */
277 VNET_DEFINE_STATIC(int, def_use_flowid) = 0;
278 #define V_def_use_flowid VNET(def_use_flowid)
279 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid,
280 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_flowid), 0,
281 "Default setting for using flow id for load sharing");
282
283 /* Default value for using numa */
284 VNET_DEFINE_STATIC(int, def_use_numa) = 1;
285 #define V_def_use_numa VNET(def_use_numa)
286 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa,
287 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_numa), 0,
288 "Use numa to steer flows");
289
290 /* Default value for flowid shift */
291 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16;
292 #define V_def_flowid_shift VNET(def_flowid_shift)
293 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift,
294 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_flowid_shift), 0,
295 "Default setting for flowid shift for load sharing");
296
297 static void
vnet_lagg_init(const void * unused __unused)298 vnet_lagg_init(const void *unused __unused)
299 {
300
301 LAGG_LIST_LOCK_INIT();
302 SLIST_INIT(&V_lagg_list);
303 struct if_clone_addreq req = {
304 .create_f = lagg_clone_create,
305 .destroy_f = lagg_clone_destroy,
306 .flags = IFC_F_AUTOUNIT,
307 };
308 V_lagg_cloner = ifc_attach_cloner(laggname, &req);
309 }
310 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
311 vnet_lagg_init, NULL);
312
313 static void
vnet_lagg_uninit(const void * unused __unused)314 vnet_lagg_uninit(const void *unused __unused)
315 {
316
317 ifc_detach_cloner(V_lagg_cloner);
318 LAGG_LIST_LOCK_DESTROY();
319 }
320 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY,
321 vnet_lagg_uninit, NULL);
322
323 static int
lagg_modevent(module_t mod,int type,void * data)324 lagg_modevent(module_t mod, int type, void *data)
325 {
326
327 switch (type) {
328 case MOD_LOAD:
329 lagg_input_ethernet_p = lagg_input_ethernet;
330 lagg_input_infiniband_p = lagg_input_infiniband;
331 lagg_linkstate_p = lagg_port_state;
332 lagg_detach_cookie = EVENTHANDLER_REGISTER(
333 ifnet_departure_event, lagg_port_ifdetach, NULL,
334 EVENTHANDLER_PRI_ANY);
335 break;
336 case MOD_UNLOAD:
337 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
338 lagg_detach_cookie);
339 lagg_input_ethernet_p = NULL;
340 lagg_input_infiniband_p = NULL;
341 lagg_linkstate_p = NULL;
342 break;
343 default:
344 return (EOPNOTSUPP);
345 }
346 return (0);
347 }
348
349 static moduledata_t lagg_mod = {
350 "if_lagg",
351 lagg_modevent,
352 0
353 };
354
355 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
356 MODULE_VERSION(if_lagg, 1);
357 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1);
358
359 static void
lagg_proto_attach(struct lagg_softc * sc,lagg_proto pr)360 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr)
361 {
362
363 LAGG_XLOCK_ASSERT(sc);
364 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto",
365 __func__, sc));
366
367 if (sc->sc_ifflags & IFF_DEBUG)
368 if_printf(sc->sc_ifp, "using proto %u\n", pr);
369
370 if (lagg_protos[pr].pr_attach != NULL)
371 lagg_protos[pr].pr_attach(sc);
372 sc->sc_proto = pr;
373 }
374
375 static void
lagg_proto_detach(struct lagg_softc * sc)376 lagg_proto_detach(struct lagg_softc *sc)
377 {
378 lagg_proto pr;
379
380 LAGG_XLOCK_ASSERT(sc);
381 pr = sc->sc_proto;
382 sc->sc_proto = LAGG_PROTO_NONE;
383
384 if (lagg_protos[pr].pr_detach != NULL)
385 lagg_protos[pr].pr_detach(sc);
386 }
387
388 static inline int
lagg_proto_start(struct lagg_softc * sc,struct mbuf * m)389 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m)
390 {
391
392 return (lagg_protos[sc->sc_proto].pr_start(sc, m));
393 }
394
395 static inline struct mbuf *
lagg_proto_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)396 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
397 {
398
399 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m));
400 }
401
402 static int
lagg_proto_addport(struct lagg_softc * sc,struct lagg_port * lp)403 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp)
404 {
405
406 if (lagg_protos[sc->sc_proto].pr_addport == NULL)
407 return (0);
408 else
409 return (lagg_protos[sc->sc_proto].pr_addport(lp));
410 }
411
412 static void
lagg_proto_delport(struct lagg_softc * sc,struct lagg_port * lp)413 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp)
414 {
415
416 if (lagg_protos[sc->sc_proto].pr_delport != NULL)
417 lagg_protos[sc->sc_proto].pr_delport(lp);
418 }
419
420 static void
lagg_proto_linkstate(struct lagg_softc * sc,struct lagg_port * lp)421 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp)
422 {
423
424 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL)
425 lagg_protos[sc->sc_proto].pr_linkstate(lp);
426 }
427
428 static void
lagg_proto_init(struct lagg_softc * sc)429 lagg_proto_init(struct lagg_softc *sc)
430 {
431
432 if (lagg_protos[sc->sc_proto].pr_init != NULL)
433 lagg_protos[sc->sc_proto].pr_init(sc);
434 }
435
436 static void
lagg_proto_stop(struct lagg_softc * sc)437 lagg_proto_stop(struct lagg_softc *sc)
438 {
439
440 if (lagg_protos[sc->sc_proto].pr_stop != NULL)
441 lagg_protos[sc->sc_proto].pr_stop(sc);
442 }
443
444 static void
lagg_proto_lladdr(struct lagg_softc * sc)445 lagg_proto_lladdr(struct lagg_softc *sc)
446 {
447
448 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL)
449 lagg_protos[sc->sc_proto].pr_lladdr(sc);
450 }
451
452 static void
lagg_proto_request(struct lagg_softc * sc,void * v)453 lagg_proto_request(struct lagg_softc *sc, void *v)
454 {
455
456 if (lagg_protos[sc->sc_proto].pr_request != NULL)
457 lagg_protos[sc->sc_proto].pr_request(sc, v);
458 }
459
460 static void
lagg_proto_portreq(struct lagg_softc * sc,struct lagg_port * lp,void * v)461 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v)
462 {
463
464 if (lagg_protos[sc->sc_proto].pr_portreq != NULL)
465 lagg_protos[sc->sc_proto].pr_portreq(lp, v);
466 }
467
468 /*
469 * This routine is run via an vlan
470 * config EVENT
471 */
472 static void
lagg_register_vlan(void * arg,struct ifnet * ifp,u_int16_t vtag)473 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
474 {
475 struct lagg_softc *sc = ifp->if_softc;
476 struct lagg_port *lp;
477
478 if (ifp->if_softc != arg) /* Not our event */
479 return;
480
481 LAGG_XLOCK(sc);
482 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
483 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
484 LAGG_XUNLOCK(sc);
485 }
486
487 /*
488 * This routine is run via an vlan
489 * unconfig EVENT
490 */
491 static void
lagg_unregister_vlan(void * arg,struct ifnet * ifp,u_int16_t vtag)492 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
493 {
494 struct lagg_softc *sc = ifp->if_softc;
495 struct lagg_port *lp;
496
497 if (ifp->if_softc != arg) /* Not our event */
498 return;
499
500 LAGG_XLOCK(sc);
501 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
502 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
503 LAGG_XUNLOCK(sc);
504 }
505
506 static int
lagg_clone_create(struct if_clone * ifc,char * name,size_t len,struct ifc_data * ifd,struct ifnet ** ifpp)507 lagg_clone_create(struct if_clone *ifc, char *name, size_t len,
508 struct ifc_data *ifd, struct ifnet **ifpp)
509 {
510 struct iflaggparam iflp;
511 struct lagg_softc *sc;
512 struct ifnet *ifp;
513 int if_type;
514 int error;
515 static const uint8_t eaddr[LAGG_ADDR_LEN];
516
517 if (ifd->params != NULL) {
518 error = ifc_copyin(ifd, &iflp, sizeof(iflp));
519 if (error)
520 return (error);
521
522 switch (iflp.lagg_type) {
523 case LAGG_TYPE_ETHERNET:
524 if_type = IFT_ETHER;
525 break;
526 case LAGG_TYPE_INFINIBAND:
527 if_type = IFT_INFINIBAND;
528 break;
529 default:
530 return (EINVAL);
531 }
532 } else {
533 if_type = IFT_ETHER;
534 }
535
536 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK | M_ZERO);
537 ifp = sc->sc_ifp = if_alloc(if_type);
538 LAGG_SX_INIT(sc);
539
540 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF);
541 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0);
542
543 LAGG_XLOCK(sc);
544 if (V_def_use_flowid)
545 sc->sc_opts |= LAGG_OPT_USE_FLOWID;
546 if (V_def_use_numa)
547 sc->sc_opts |= LAGG_OPT_USE_NUMA;
548 sc->flowid_shift = V_def_flowid_shift;
549
550 /* Hash all layers by default */
551 sc->sc_flags = MBUF_HASHFLAG_L2 | MBUF_HASHFLAG_L3 | MBUF_HASHFLAG_L4;
552
553 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT);
554
555 CK_SLIST_INIT(&sc->sc_ports);
556
557 switch (if_type) {
558 case IFT_ETHER:
559 /* Initialise pseudo media types */
560 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
561 lagg_media_status);
562 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
563 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
564
565 if_initname(ifp, laggname, ifd->unit);
566 ifp->if_transmit = lagg_transmit_ethernet;
567 break;
568 case IFT_INFINIBAND:
569 if_initname(ifp, laggname, ifd->unit);
570 ifp->if_transmit = lagg_transmit_infiniband;
571 break;
572 default:
573 break;
574 }
575 ifp->if_softc = sc;
576 ifp->if_qflush = lagg_qflush;
577 ifp->if_init = lagg_init;
578 ifp->if_ioctl = lagg_ioctl;
579 ifp->if_get_counter = lagg_get_counter;
580 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
581 #if defined(KERN_TLS) || defined(RATELIMIT)
582 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc;
583 ifp->if_ratelimit_query = lagg_ratelimit_query;
584 #endif
585 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
586
587 /*
588 * Attach as an ordinary ethernet device, children will be attached
589 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG.
590 */
591 switch (if_type) {
592 case IFT_ETHER:
593 ether_ifattach(ifp, eaddr);
594 break;
595 case IFT_INFINIBAND:
596 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr);
597 break;
598 default:
599 break;
600 }
601
602 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
603 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
604 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
605 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
606
607 /* Insert into the global list of laggs */
608 LAGG_LIST_LOCK();
609 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
610 LAGG_LIST_UNLOCK();
611 LAGG_XUNLOCK(sc);
612 *ifpp = ifp;
613
614 return (0);
615 }
616
617 static int
lagg_clone_destroy(struct if_clone * ifc,struct ifnet * ifp,uint32_t flags)618 lagg_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags)
619 {
620 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
621 struct lagg_port *lp;
622
623 LAGG_XLOCK(sc);
624 sc->sc_destroying = 1;
625 lagg_stop(sc);
626 ifp->if_flags &= ~IFF_UP;
627
628 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
629 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
630
631 /* Shutdown and remove lagg ports */
632 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL)
633 lagg_port_destroy(lp, 1);
634
635 /* Unhook the aggregation protocol */
636 lagg_proto_detach(sc);
637 LAGG_XUNLOCK(sc);
638
639 switch (ifp->if_type) {
640 case IFT_ETHER:
641 ether_ifdetach(ifp);
642 ifmedia_removeall(&sc->sc_media);
643 break;
644 case IFT_INFINIBAND:
645 infiniband_ifdetach(ifp);
646 break;
647 default:
648 break;
649 }
650 if_free(ifp);
651
652 LAGG_LIST_LOCK();
653 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
654 LAGG_LIST_UNLOCK();
655
656 mtx_destroy(&sc->sc_mtx);
657 LAGG_SX_DESTROY(sc);
658 free(sc, M_LAGG);
659
660 return (0);
661 }
662
663 static void
lagg_capabilities(struct lagg_softc * sc)664 lagg_capabilities(struct lagg_softc *sc)
665 {
666 struct lagg_port *lp;
667 int cap, cap2, ena, ena2, pena, pena2;
668 uint64_t hwa;
669 struct ifnet_hw_tsomax hw_tsomax;
670
671 LAGG_XLOCK_ASSERT(sc);
672
673 /* Get common enabled capabilities for the lagg ports */
674 ena = ena2 = ~0;
675 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
676 ena &= lp->lp_ifp->if_capenable;
677 ena2 &= lp->lp_ifp->if_capenable2;
678 }
679 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL)
680 ena = ena2 = 0;
681
682 /*
683 * Apply common enabled capabilities back to the lagg ports.
684 * May require several iterations if they are dependent.
685 */
686 do {
687 pena = ena;
688 pena2 = ena2;
689 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
690 lagg_setcaps(lp, ena, ena2);
691 ena &= lp->lp_ifp->if_capenable;
692 ena2 &= lp->lp_ifp->if_capenable2;
693 }
694 } while (pena != ena || pena2 != ena2);
695 ena2 &= ~IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD);
696
697 /* Get other capabilities from the lagg ports */
698 cap = cap2 = ~0;
699 hwa = ~(uint64_t)0;
700 memset(&hw_tsomax, 0, sizeof(hw_tsomax));
701 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
702 cap &= lp->lp_ifp->if_capabilities;
703 cap2 &= lp->lp_ifp->if_capabilities2;
704 hwa &= lp->lp_ifp->if_hwassist;
705 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
706 }
707 cap2 &= ~IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD);
708 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL)
709 cap = cap2 = hwa = 0;
710
711 if (sc->sc_ifp->if_capabilities != cap ||
712 sc->sc_ifp->if_capenable != ena ||
713 sc->sc_ifp->if_capenable2 != ena2 ||
714 sc->sc_ifp->if_hwassist != hwa ||
715 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
716 sc->sc_ifp->if_capabilities = cap;
717 sc->sc_ifp->if_capabilities2 = cap2;
718 sc->sc_ifp->if_capenable = ena;
719 sc->sc_ifp->if_capenable2 = ena2;
720 sc->sc_ifp->if_hwassist = hwa;
721 getmicrotime(&sc->sc_ifp->if_lastchange);
722
723 if (sc->sc_ifflags & IFF_DEBUG)
724 if_printf(sc->sc_ifp,
725 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
726 }
727 }
728
729 static int
lagg_port_create(struct lagg_softc * sc,struct ifnet * ifp)730 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
731 {
732 struct lagg_softc *sc_ptr;
733 struct lagg_port *lp, *tlp;
734 struct ifreq ifr;
735 int error, i, oldmtu;
736 int if_type;
737 uint64_t *pval;
738
739 LAGG_XLOCK_ASSERT(sc);
740
741 if (sc->sc_ifp == ifp) {
742 if_printf(sc->sc_ifp,
743 "cannot add a lagg to itself as a port\n");
744 return (EINVAL);
745 }
746
747 if (sc->sc_destroying == 1)
748 return (ENXIO);
749
750 /* Limit the maximal number of lagg ports */
751 if (sc->sc_count >= LAGG_MAX_PORTS)
752 return (ENOSPC);
753
754 /* Check if port has already been associated to a lagg */
755 if (ifp->if_lagg != NULL) {
756 /* Port is already in the current lagg? */
757 lp = (struct lagg_port *)ifp->if_lagg;
758 if (lp->lp_softc == sc)
759 return (EEXIST);
760 return (EBUSY);
761 }
762
763 switch (sc->sc_ifp->if_type) {
764 case IFT_ETHER:
765 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
766 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN)
767 return (EPROTONOSUPPORT);
768 if_type = IFT_IEEE8023ADLAG;
769 break;
770 case IFT_INFINIBAND:
771 /* XXX Disallow non-infiniband interfaces */
772 if (ifp->if_type != IFT_INFINIBAND)
773 return (EPROTONOSUPPORT);
774 if_type = IFT_INFINIBANDLAG;
775 break;
776 default:
777 break;
778 }
779
780 /* Allow the first Ethernet member to define the MTU */
781 oldmtu = -1;
782 if (CK_SLIST_EMPTY(&sc->sc_ports)) {
783 sc->sc_ifp->if_mtu = ifp->if_mtu;
784 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
785 if (ifp->if_ioctl == NULL) {
786 if_printf(sc->sc_ifp, "cannot change MTU for %s\n",
787 ifp->if_xname);
788 return (EINVAL);
789 }
790 oldmtu = ifp->if_mtu;
791 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name));
792 ifr.ifr_mtu = sc->sc_ifp->if_mtu;
793 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr);
794 if (error != 0) {
795 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
796 ifp->if_xname);
797 return (error);
798 }
799 ifr.ifr_mtu = oldmtu;
800 }
801
802 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK | M_ZERO);
803 lp->lp_softc = sc;
804
805 /* Check if port is a stacked lagg */
806 LAGG_LIST_LOCK();
807 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
808 if (ifp == sc_ptr->sc_ifp) {
809 LAGG_LIST_UNLOCK();
810 free(lp, M_LAGG);
811 if (oldmtu != -1)
812 (*ifp->if_ioctl)(ifp, SIOCSIFMTU,
813 (caddr_t)&ifr);
814 return (EINVAL);
815 /* XXX disable stacking for the moment, its untested */
816 #ifdef LAGG_PORT_STACKING
817 lp->lp_flags |= LAGG_PORT_STACK;
818 if (lagg_port_checkstacking(sc_ptr) >=
819 LAGG_MAX_STACKING) {
820 LAGG_LIST_UNLOCK();
821 free(lp, M_LAGG);
822 if (oldmtu != -1)
823 (*ifp->if_ioctl)(ifp, SIOCSIFMTU,
824 (caddr_t)&ifr);
825 return (E2BIG);
826 }
827 #endif
828 }
829 }
830 LAGG_LIST_UNLOCK();
831
832 if_ref(ifp);
833 lp->lp_ifp = ifp;
834
835 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen);
836 lp->lp_ifcapenable = ifp->if_capenable;
837 if (CK_SLIST_EMPTY(&sc->sc_ports)) {
838 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen);
839 lagg_proto_lladdr(sc);
840 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
841 } else {
842 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen);
843 }
844 lagg_setflags(lp, 1);
845
846 if (CK_SLIST_EMPTY(&sc->sc_ports))
847 sc->sc_primary = lp;
848
849 /* Change the interface type */
850 lp->lp_iftype = ifp->if_type;
851 ifp->if_type = if_type;
852 ifp->if_lagg = lp;
853 lp->lp_ioctl = ifp->if_ioctl;
854 ifp->if_ioctl = lagg_port_ioctl;
855 lp->lp_output = ifp->if_output;
856 ifp->if_output = lagg_port_output;
857
858 /* Read port counters */
859 pval = lp->port_counters.val;
860 for (i = 0; i < IFCOUNTERS; i++, pval++)
861 *pval = ifp->if_get_counter(ifp, i);
862
863 /*
864 * Insert into the list of ports.
865 * Keep ports sorted by if_index. It is handy, when configuration
866 * is predictable and `ifconfig laggN create ...` command
867 * will lead to the same result each time.
868 */
869 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
870 if (tlp->lp_ifp->if_index < ifp->if_index && (
871 CK_SLIST_NEXT(tlp, lp_entries) == NULL ||
872 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index >
873 ifp->if_index))
874 break;
875 }
876 if (tlp != NULL)
877 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries);
878 else
879 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
880 sc->sc_count++;
881
882 lagg_setmulti(lp);
883
884 if ((error = lagg_proto_addport(sc, lp)) != 0) {
885 /* Remove the port, without calling pr_delport. */
886 lagg_port_destroy(lp, 0);
887 if (oldmtu != -1)
888 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr);
889 return (error);
890 }
891
892 /* Update lagg capabilities */
893 lagg_capabilities(sc);
894 lagg_linkstate(sc);
895
896 return (0);
897 }
898
899 #ifdef LAGG_PORT_STACKING
900 static int
lagg_port_checkstacking(struct lagg_softc * sc)901 lagg_port_checkstacking(struct lagg_softc *sc)
902 {
903 struct lagg_softc *sc_ptr;
904 struct lagg_port *lp;
905 int m = 0;
906
907 LAGG_SXLOCK_ASSERT(sc);
908 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
909 if (lp->lp_flags & LAGG_PORT_STACK) {
910 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
911 m = MAX(m, lagg_port_checkstacking(sc_ptr));
912 }
913 }
914
915 return (m + 1);
916 }
917 #endif
918
919 static void
lagg_port_destroy_cb(epoch_context_t ec)920 lagg_port_destroy_cb(epoch_context_t ec)
921 {
922 struct lagg_port *lp;
923 struct ifnet *ifp;
924
925 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx);
926 ifp = lp->lp_ifp;
927
928 if_rele(ifp);
929 free(lp, M_LAGG);
930 }
931
932 static int
lagg_port_destroy(struct lagg_port * lp,int rundelport)933 lagg_port_destroy(struct lagg_port *lp, int rundelport)
934 {
935 struct lagg_softc *sc = lp->lp_softc;
936 struct lagg_port *lp_ptr, *lp0;
937 struct ifnet *ifp = lp->lp_ifp;
938 uint64_t *pval, vdiff;
939 int i;
940
941 LAGG_XLOCK_ASSERT(sc);
942
943 if (rundelport)
944 lagg_proto_delport(sc, lp);
945
946 if (lp->lp_detaching == 0)
947 lagg_clrmulti(lp);
948
949 /* Restore interface */
950 ifp->if_type = lp->lp_iftype;
951 ifp->if_ioctl = lp->lp_ioctl;
952 ifp->if_output = lp->lp_output;
953 ifp->if_lagg = NULL;
954
955 /* Update detached port counters */
956 pval = lp->port_counters.val;
957 for (i = 0; i < IFCOUNTERS; i++, pval++) {
958 vdiff = ifp->if_get_counter(ifp, i) - *pval;
959 sc->detached_counters.val[i] += vdiff;
960 }
961
962 /* Finally, remove the port from the lagg */
963 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
964 sc->sc_count--;
965
966 /* Update the primary interface */
967 if (lp == sc->sc_primary) {
968 uint8_t lladdr[LAGG_ADDR_LEN];
969
970 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL)
971 bzero(&lladdr, LAGG_ADDR_LEN);
972 else
973 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN);
974 sc->sc_primary = lp0;
975 if (sc->sc_destroying == 0) {
976 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen);
977 lagg_proto_lladdr(sc);
978 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
979
980 /*
981 * Update lladdr for each port (new primary needs update
982 * as well, to switch from old lladdr to its 'real' one).
983 * We can skip this if the lagg is being destroyed.
984 */
985 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
986 if_setlladdr(lp_ptr->lp_ifp, lladdr,
987 lp_ptr->lp_ifp->if_addrlen);
988 }
989 }
990
991 if (lp->lp_ifflags)
992 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
993
994 if (lp->lp_detaching == 0) {
995 lagg_setflags(lp, 0);
996 lagg_setcaps(lp, lp->lp_ifcapenable, lp->lp_ifcapenable2);
997 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen);
998 }
999
1000 /*
1001 * free port and release it's ifnet reference after a grace period has
1002 * elapsed.
1003 */
1004 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx);
1005 /* Update lagg capabilities */
1006 lagg_capabilities(sc);
1007 lagg_linkstate(sc);
1008
1009 return (0);
1010 }
1011
1012 static int
lagg_port_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)1013 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1014 {
1015 struct lagg_reqport *rp = (struct lagg_reqport *)data;
1016 struct lagg_softc *sc;
1017 struct lagg_port *lp = NULL;
1018 int error = 0;
1019
1020 /* Should be checked by the caller */
1021 switch (ifp->if_type) {
1022 case IFT_IEEE8023ADLAG:
1023 case IFT_INFINIBANDLAG:
1024 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
1025 goto fallback;
1026 break;
1027 default:
1028 goto fallback;
1029 }
1030
1031 switch (cmd) {
1032 case SIOCGLAGGPORT:
1033 if (rp->rp_portname[0] == '\0' ||
1034 ifunit(rp->rp_portname) != ifp) {
1035 error = EINVAL;
1036 break;
1037 }
1038
1039 LAGG_SLOCK(sc);
1040 if (__predict_true((lp = ifp->if_lagg) != NULL &&
1041 lp->lp_softc == sc))
1042 lagg_port2req(lp, rp);
1043 else
1044 error = ENOENT; /* XXXGL: can happen? */
1045 LAGG_SUNLOCK(sc);
1046 break;
1047
1048 case SIOCSIFCAP:
1049 case SIOCSIFCAPNV:
1050 if (lp->lp_ioctl == NULL) {
1051 error = EINVAL;
1052 break;
1053 }
1054 error = (*lp->lp_ioctl)(ifp, cmd, data);
1055 if (error)
1056 break;
1057
1058 /* Update lagg interface capabilities */
1059 LAGG_XLOCK(sc);
1060 lagg_capabilities(sc);
1061 LAGG_XUNLOCK(sc);
1062 VLAN_CAPABILITIES(sc->sc_ifp);
1063 break;
1064
1065 case SIOCSIFMTU:
1066 /* Do not allow the MTU to be changed once joined */
1067 error = EINVAL;
1068 break;
1069
1070 default:
1071 goto fallback;
1072 }
1073
1074 return (error);
1075
1076 fallback:
1077 if (lp != NULL && lp->lp_ioctl != NULL)
1078 return ((*lp->lp_ioctl)(ifp, cmd, data));
1079
1080 return (EINVAL);
1081 }
1082
1083 /*
1084 * Requests counter @cnt data.
1085 *
1086 * Counter value is calculated the following way:
1087 * 1) for each port, sum difference between current and "initial" measurements.
1088 * 2) add lagg logical interface counters.
1089 * 3) add data from detached_counters array.
1090 *
1091 * We also do the following things on ports attach/detach:
1092 * 1) On port attach we store all counters it has into port_counter array.
1093 * 2) On port detach we add the different between "initial" and
1094 * current counters data to detached_counters array.
1095 */
1096 static uint64_t
lagg_get_counter(struct ifnet * ifp,ift_counter cnt)1097 lagg_get_counter(struct ifnet *ifp, ift_counter cnt)
1098 {
1099 struct epoch_tracker et;
1100 struct lagg_softc *sc;
1101 struct lagg_port *lp;
1102 struct ifnet *lpifp;
1103 uint64_t newval, oldval, vsum;
1104
1105 /* Revise this when we've got non-generic counters. */
1106 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1107
1108 sc = (struct lagg_softc *)ifp->if_softc;
1109
1110 vsum = 0;
1111 NET_EPOCH_ENTER(et);
1112 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1113 /* Saved attached value */
1114 oldval = lp->port_counters.val[cnt];
1115 /* current value */
1116 lpifp = lp->lp_ifp;
1117 newval = lpifp->if_get_counter(lpifp, cnt);
1118 /* Calculate diff and save new */
1119 vsum += newval - oldval;
1120 }
1121 NET_EPOCH_EXIT(et);
1122
1123 /*
1124 * Add counter data which might be added by upper
1125 * layer protocols operating on logical interface.
1126 */
1127 vsum += if_get_counter_default(ifp, cnt);
1128
1129 /*
1130 * Add counter data from detached ports counters
1131 */
1132 vsum += sc->detached_counters.val[cnt];
1133
1134 return (vsum);
1135 }
1136
1137 /*
1138 * For direct output to child ports.
1139 */
1140 static int
lagg_port_output(struct ifnet * ifp,struct mbuf * m,const struct sockaddr * dst,struct route * ro)1141 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
1142 const struct sockaddr *dst, struct route *ro)
1143 {
1144 struct lagg_port *lp = ifp->if_lagg;
1145
1146 switch (dst->sa_family) {
1147 case pseudo_AF_HDRCMPLT:
1148 case AF_UNSPEC:
1149 if (lp != NULL)
1150 return ((*lp->lp_output)(ifp, m, dst, ro));
1151 }
1152
1153 /* drop any other frames */
1154 m_freem(m);
1155 return (ENETDOWN);
1156 }
1157
1158 static void
lagg_port_ifdetach(void * arg __unused,struct ifnet * ifp)1159 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
1160 {
1161 struct lagg_port *lp;
1162 struct lagg_softc *sc;
1163
1164 if ((lp = ifp->if_lagg) == NULL)
1165 return;
1166 /* If the ifnet is just being renamed, don't do anything. */
1167 if (ifp->if_flags & IFF_RENAMING)
1168 return;
1169
1170 sc = lp->lp_softc;
1171
1172 LAGG_XLOCK(sc);
1173 lp->lp_detaching = 1;
1174 lagg_port_destroy(lp, 1);
1175 LAGG_XUNLOCK(sc);
1176 VLAN_CAPABILITIES(sc->sc_ifp);
1177 }
1178
1179 static void
lagg_port2req(struct lagg_port * lp,struct lagg_reqport * rp)1180 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
1181 {
1182 struct lagg_softc *sc = lp->lp_softc;
1183
1184 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
1185 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
1186 rp->rp_prio = lp->lp_prio;
1187 rp->rp_flags = lp->lp_flags;
1188 lagg_proto_portreq(sc, lp, &rp->rp_psc);
1189
1190 /* Add protocol specific flags */
1191 switch (sc->sc_proto) {
1192 case LAGG_PROTO_FAILOVER:
1193 if (lp == sc->sc_primary)
1194 rp->rp_flags |= LAGG_PORT_MASTER;
1195 if (lp == lagg_link_active(sc, sc->sc_primary))
1196 rp->rp_flags |= LAGG_PORT_ACTIVE;
1197 break;
1198
1199 case LAGG_PROTO_ROUNDROBIN:
1200 case LAGG_PROTO_LOADBALANCE:
1201 case LAGG_PROTO_BROADCAST:
1202 if (LAGG_PORTACTIVE(lp))
1203 rp->rp_flags |= LAGG_PORT_ACTIVE;
1204 break;
1205
1206 case LAGG_PROTO_LACP:
1207 /* LACP has a different definition of active */
1208 if (lacp_isactive(lp))
1209 rp->rp_flags |= LAGG_PORT_ACTIVE;
1210 if (lacp_iscollecting(lp))
1211 rp->rp_flags |= LAGG_PORT_COLLECTING;
1212 if (lacp_isdistributing(lp))
1213 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
1214 break;
1215 }
1216
1217 }
1218
1219 static void
lagg_watchdog_infiniband(void * arg)1220 lagg_watchdog_infiniband(void *arg)
1221 {
1222 struct epoch_tracker et;
1223 struct lagg_softc *sc;
1224 struct lagg_port *lp;
1225 struct ifnet *ifp;
1226 struct ifnet *lp_ifp;
1227
1228 sc = arg;
1229
1230 /*
1231 * Because infiniband nodes have a fixed MAC address, which is
1232 * generated by the so-called GID, we need to regularly update
1233 * the link level address of the parent lagg<N> device when
1234 * the active port changes. Possibly we could piggy-back on
1235 * link up/down events aswell, but using a timer also provides
1236 * a guarantee against too frequent events. This operation
1237 * does not have to be atomic.
1238 */
1239 NET_EPOCH_ENTER(et);
1240 lp = lagg_link_active(sc, sc->sc_primary);
1241 if (lp != NULL) {
1242 ifp = sc->sc_ifp;
1243 lp_ifp = lp->lp_ifp;
1244
1245 if (ifp != NULL && lp_ifp != NULL &&
1246 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 ||
1247 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) {
1248 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen);
1249 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen);
1250
1251 CURVNET_SET(ifp->if_vnet);
1252 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
1253 CURVNET_RESTORE();
1254 }
1255 }
1256 NET_EPOCH_EXIT(et);
1257
1258 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg);
1259 }
1260
1261 static void
lagg_if_updown(struct lagg_softc * sc,bool up)1262 lagg_if_updown(struct lagg_softc *sc, bool up)
1263 {
1264 struct ifreq ifr = {};
1265 struct lagg_port *lp;
1266
1267 LAGG_XLOCK_ASSERT(sc);
1268
1269 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1270 if (up)
1271 if_up(lp->lp_ifp);
1272 else
1273 if_down(lp->lp_ifp);
1274
1275 if (lp->lp_ioctl != NULL)
1276 lp->lp_ioctl(lp->lp_ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1277 }
1278 }
1279
1280 static void
lagg_init(void * xsc)1281 lagg_init(void *xsc)
1282 {
1283 struct lagg_softc *sc = (struct lagg_softc *)xsc;
1284 struct ifnet *ifp = sc->sc_ifp;
1285 struct lagg_port *lp;
1286
1287 LAGG_XLOCK(sc);
1288 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1289 LAGG_XUNLOCK(sc);
1290 return;
1291 }
1292
1293 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1294
1295 /*
1296 * Update the port lladdrs if needed.
1297 * This might be if_setlladdr() notification
1298 * that lladdr has been changed.
1299 */
1300 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1301 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp),
1302 ifp->if_addrlen) != 0)
1303 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen);
1304 }
1305
1306 lagg_if_updown(sc, true);
1307
1308 lagg_proto_init(sc);
1309
1310 if (ifp->if_type == IFT_INFINIBAND) {
1311 mtx_lock(&sc->sc_mtx);
1312 lagg_watchdog_infiniband(sc);
1313 mtx_unlock(&sc->sc_mtx);
1314 }
1315
1316 LAGG_XUNLOCK(sc);
1317 }
1318
1319 static void
lagg_stop(struct lagg_softc * sc)1320 lagg_stop(struct lagg_softc *sc)
1321 {
1322 struct ifnet *ifp = sc->sc_ifp;
1323
1324 LAGG_XLOCK_ASSERT(sc);
1325
1326 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1327 return;
1328
1329 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1330
1331 lagg_proto_stop(sc);
1332
1333 mtx_lock(&sc->sc_mtx);
1334 callout_stop(&sc->sc_watchdog);
1335 mtx_unlock(&sc->sc_mtx);
1336
1337 lagg_if_updown(sc, false);
1338
1339 callout_drain(&sc->sc_watchdog);
1340 }
1341
1342 static int
lagg_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)1343 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1344 {
1345 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1346 struct lagg_reqall *ra = (struct lagg_reqall *)data;
1347 struct lagg_reqopts *ro = (struct lagg_reqopts *)data;
1348 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
1349 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
1350 struct ifreq *ifr = (struct ifreq *)data;
1351 struct lagg_port *lp;
1352 struct ifnet *tpif;
1353 struct thread *td = curthread;
1354 char *buf, *outbuf;
1355 int count, buflen, len, error = 0, oldmtu;
1356
1357 bzero(&rpbuf, sizeof(rpbuf));
1358
1359 /* XXX: This can race with lagg_clone_destroy. */
1360
1361 switch (cmd) {
1362 case SIOCGLAGG:
1363 LAGG_XLOCK(sc);
1364 buflen = sc->sc_count * sizeof(struct lagg_reqport);
1365 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1366 ra->ra_proto = sc->sc_proto;
1367 lagg_proto_request(sc, &ra->ra_psc);
1368 count = 0;
1369 buf = outbuf;
1370 len = min(ra->ra_size, buflen);
1371 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1372 if (len < sizeof(rpbuf))
1373 break;
1374
1375 lagg_port2req(lp, &rpbuf);
1376 memcpy(buf, &rpbuf, sizeof(rpbuf));
1377 count++;
1378 buf += sizeof(rpbuf);
1379 len -= sizeof(rpbuf);
1380 }
1381 LAGG_XUNLOCK(sc);
1382 ra->ra_ports = count;
1383 ra->ra_size = count * sizeof(rpbuf);
1384 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1385 free(outbuf, M_TEMP);
1386 break;
1387 case SIOCSLAGG:
1388 error = priv_check(td, PRIV_NET_LAGG);
1389 if (error)
1390 break;
1391 if (ra->ra_proto >= LAGG_PROTO_MAX) {
1392 error = EPROTONOSUPPORT;
1393 break;
1394 }
1395 /* Infiniband only supports the failover protocol. */
1396 if (ra->ra_proto != LAGG_PROTO_FAILOVER &&
1397 ifp->if_type == IFT_INFINIBAND) {
1398 error = EPROTONOSUPPORT;
1399 break;
1400 }
1401 LAGG_XLOCK(sc);
1402 lagg_proto_detach(sc);
1403 lagg_proto_attach(sc, ra->ra_proto);
1404 LAGG_XUNLOCK(sc);
1405 break;
1406 case SIOCGLAGGOPTS:
1407 LAGG_XLOCK(sc);
1408 ro->ro_opts = sc->sc_opts;
1409 if (sc->sc_proto == LAGG_PROTO_LACP) {
1410 struct lacp_softc *lsc;
1411
1412 lsc = (struct lacp_softc *)sc->sc_psc;
1413 if (lsc->lsc_debug.lsc_tx_test != 0)
1414 ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
1415 if (lsc->lsc_debug.lsc_rx_test != 0)
1416 ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
1417 if (lsc->lsc_strict_mode != 0)
1418 ro->ro_opts |= LAGG_OPT_LACP_STRICT;
1419 if (lsc->lsc_fast_timeout != 0)
1420 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO;
1421
1422 ro->ro_active = sc->sc_active;
1423 } else {
1424 ro->ro_active = 0;
1425 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1426 ro->ro_active += LAGG_PORTACTIVE(lp);
1427 }
1428 ro->ro_bkt = sc->sc_stride;
1429 ro->ro_flapping = sc->sc_flapping;
1430 ro->ro_flowid_shift = sc->flowid_shift;
1431 LAGG_XUNLOCK(sc);
1432 break;
1433 case SIOCSLAGGOPTS:
1434 error = priv_check(td, PRIV_NET_LAGG);
1435 if (error)
1436 break;
1437
1438 /*
1439 * The stride option was added without defining a corresponding
1440 * LAGG_OPT flag, so handle a non-zero value before checking
1441 * anything else to preserve compatibility.
1442 */
1443 LAGG_XLOCK(sc);
1444 if (ro->ro_opts == 0 && ro->ro_bkt != 0) {
1445 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) {
1446 LAGG_XUNLOCK(sc);
1447 error = EINVAL;
1448 break;
1449 }
1450 sc->sc_stride = ro->ro_bkt;
1451 }
1452 if (ro->ro_opts == 0) {
1453 LAGG_XUNLOCK(sc);
1454 break;
1455 }
1456
1457 /*
1458 * Set options. LACP options are stored in sc->sc_psc,
1459 * not in sc_opts.
1460 */
1461 int valid, lacp;
1462
1463 switch (ro->ro_opts) {
1464 case LAGG_OPT_USE_FLOWID:
1465 case -LAGG_OPT_USE_FLOWID:
1466 case LAGG_OPT_USE_NUMA:
1467 case -LAGG_OPT_USE_NUMA:
1468 case LAGG_OPT_FLOWIDSHIFT:
1469 case LAGG_OPT_RR_LIMIT:
1470 valid = 1;
1471 lacp = 0;
1472 break;
1473 case LAGG_OPT_LACP_TXTEST:
1474 case -LAGG_OPT_LACP_TXTEST:
1475 case LAGG_OPT_LACP_RXTEST:
1476 case -LAGG_OPT_LACP_RXTEST:
1477 case LAGG_OPT_LACP_STRICT:
1478 case -LAGG_OPT_LACP_STRICT:
1479 case LAGG_OPT_LACP_FAST_TIMO:
1480 case -LAGG_OPT_LACP_FAST_TIMO:
1481 valid = lacp = 1;
1482 break;
1483 default:
1484 valid = lacp = 0;
1485 break;
1486 }
1487
1488 if (valid == 0 ||
1489 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
1490 /* Invalid combination of options specified. */
1491 error = EINVAL;
1492 LAGG_XUNLOCK(sc);
1493 break; /* Return from SIOCSLAGGOPTS. */
1494 }
1495
1496 /*
1497 * Store new options into sc->sc_opts except for
1498 * FLOWIDSHIFT, RR and LACP options.
1499 */
1500 if (lacp == 0) {
1501 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
1502 sc->flowid_shift = ro->ro_flowid_shift;
1503 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) {
1504 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN ||
1505 ro->ro_bkt == 0) {
1506 error = EINVAL;
1507 LAGG_XUNLOCK(sc);
1508 break;
1509 }
1510 sc->sc_stride = ro->ro_bkt;
1511 } else if (ro->ro_opts > 0)
1512 sc->sc_opts |= ro->ro_opts;
1513 else
1514 sc->sc_opts &= ~ro->ro_opts;
1515 } else {
1516 struct lacp_softc *lsc;
1517 struct lacp_port *lp;
1518
1519 lsc = (struct lacp_softc *)sc->sc_psc;
1520
1521 switch (ro->ro_opts) {
1522 case LAGG_OPT_LACP_TXTEST:
1523 lsc->lsc_debug.lsc_tx_test = 1;
1524 break;
1525 case -LAGG_OPT_LACP_TXTEST:
1526 lsc->lsc_debug.lsc_tx_test = 0;
1527 break;
1528 case LAGG_OPT_LACP_RXTEST:
1529 lsc->lsc_debug.lsc_rx_test = 1;
1530 break;
1531 case -LAGG_OPT_LACP_RXTEST:
1532 lsc->lsc_debug.lsc_rx_test = 0;
1533 break;
1534 case LAGG_OPT_LACP_STRICT:
1535 lsc->lsc_strict_mode = 1;
1536 break;
1537 case -LAGG_OPT_LACP_STRICT:
1538 lsc->lsc_strict_mode = 0;
1539 break;
1540 case LAGG_OPT_LACP_FAST_TIMO:
1541 LACP_LOCK(lsc);
1542 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1543 lp->lp_state |= LACP_STATE_TIMEOUT;
1544 LACP_UNLOCK(lsc);
1545 lsc->lsc_fast_timeout = 1;
1546 break;
1547 case -LAGG_OPT_LACP_FAST_TIMO:
1548 LACP_LOCK(lsc);
1549 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1550 lp->lp_state &= ~LACP_STATE_TIMEOUT;
1551 LACP_UNLOCK(lsc);
1552 lsc->lsc_fast_timeout = 0;
1553 break;
1554 }
1555 }
1556 LAGG_XUNLOCK(sc);
1557 break;
1558 case SIOCGLAGGFLAGS:
1559 rf->rf_flags = 0;
1560 LAGG_XLOCK(sc);
1561 if (sc->sc_flags & MBUF_HASHFLAG_L2)
1562 rf->rf_flags |= LAGG_F_HASHL2;
1563 if (sc->sc_flags & MBUF_HASHFLAG_L3)
1564 rf->rf_flags |= LAGG_F_HASHL3;
1565 if (sc->sc_flags & MBUF_HASHFLAG_L4)
1566 rf->rf_flags |= LAGG_F_HASHL4;
1567 LAGG_XUNLOCK(sc);
1568 break;
1569 case SIOCSLAGGHASH:
1570 error = priv_check(td, PRIV_NET_LAGG);
1571 if (error)
1572 break;
1573 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1574 error = EINVAL;
1575 break;
1576 }
1577 LAGG_XLOCK(sc);
1578 sc->sc_flags = 0;
1579 if (rf->rf_flags & LAGG_F_HASHL2)
1580 sc->sc_flags |= MBUF_HASHFLAG_L2;
1581 if (rf->rf_flags & LAGG_F_HASHL3)
1582 sc->sc_flags |= MBUF_HASHFLAG_L3;
1583 if (rf->rf_flags & LAGG_F_HASHL4)
1584 sc->sc_flags |= MBUF_HASHFLAG_L4;
1585 LAGG_XUNLOCK(sc);
1586 break;
1587 case SIOCGLAGGPORT:
1588 if (rp->rp_portname[0] == '\0' ||
1589 (tpif = ifunit_ref(rp->rp_portname)) == NULL) {
1590 error = EINVAL;
1591 break;
1592 }
1593
1594 LAGG_SLOCK(sc);
1595 if (__predict_true((lp = tpif->if_lagg) != NULL &&
1596 lp->lp_softc == sc))
1597 lagg_port2req(lp, rp);
1598 else
1599 error = ENOENT; /* XXXGL: can happen? */
1600 LAGG_SUNLOCK(sc);
1601 if_rele(tpif);
1602 break;
1603
1604 case SIOCSLAGGPORT:
1605 error = priv_check(td, PRIV_NET_LAGG);
1606 if (error)
1607 break;
1608 if (rp->rp_portname[0] == '\0' ||
1609 (tpif = ifunit_ref(rp->rp_portname)) == NULL) {
1610 error = EINVAL;
1611 break;
1612 }
1613 #ifdef INET6
1614 /*
1615 * A laggport interface should not have inet6 address
1616 * because two interfaces with a valid link-local
1617 * scope zone must not be merged in any form. This
1618 * restriction is needed to prevent violation of
1619 * link-local scope zone. Attempts to add a laggport
1620 * interface which has inet6 addresses triggers
1621 * removal of all inet6 addresses on the member
1622 * interface.
1623 */
1624 if (in6ifa_llaonifp(tpif)) {
1625 in6_ifdetach(tpif);
1626 if_printf(sc->sc_ifp,
1627 "IPv6 addresses on %s have been removed "
1628 "before adding it as a member to prevent "
1629 "IPv6 address scope violation.\n",
1630 tpif->if_xname);
1631 }
1632 #endif
1633 oldmtu = ifp->if_mtu;
1634 LAGG_XLOCK(sc);
1635 error = lagg_port_create(sc, tpif);
1636 LAGG_XUNLOCK(sc);
1637 if_rele(tpif);
1638
1639 /*
1640 * LAGG MTU may change during addition of the first port.
1641 * If it did, do network layer specific procedure.
1642 */
1643 if (ifp->if_mtu != oldmtu)
1644 if_notifymtu(ifp);
1645
1646 VLAN_CAPABILITIES(ifp);
1647 break;
1648 case SIOCSLAGGDELPORT:
1649 error = priv_check(td, PRIV_NET_LAGG);
1650 if (error)
1651 break;
1652 if (rp->rp_portname[0] == '\0' ||
1653 (tpif = ifunit_ref(rp->rp_portname)) == NULL) {
1654 error = EINVAL;
1655 break;
1656 }
1657
1658 LAGG_XLOCK(sc);
1659 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1660 lp->lp_softc != sc) {
1661 error = ENOENT;
1662 LAGG_XUNLOCK(sc);
1663 if_rele(tpif);
1664 break;
1665 }
1666
1667 error = lagg_port_destroy(lp, 1);
1668 LAGG_XUNLOCK(sc);
1669 if_rele(tpif);
1670 VLAN_CAPABILITIES(ifp);
1671 break;
1672 case SIOCSIFFLAGS:
1673 /* Set flags on ports too */
1674 LAGG_XLOCK(sc);
1675 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1676 lagg_setflags(lp, 1);
1677 }
1678
1679 if (!(ifp->if_flags & IFF_UP) &&
1680 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1681 /*
1682 * If interface is marked down and it is running,
1683 * then stop and disable it.
1684 */
1685 lagg_stop(sc);
1686 LAGG_XUNLOCK(sc);
1687 } else if ((ifp->if_flags & IFF_UP) &&
1688 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1689 /*
1690 * If interface is marked up and it is stopped, then
1691 * start it.
1692 */
1693 LAGG_XUNLOCK(sc);
1694 (*ifp->if_init)(sc);
1695 } else
1696 LAGG_XUNLOCK(sc);
1697 break;
1698 case SIOCADDMULTI:
1699 case SIOCDELMULTI:
1700 LAGG_XLOCK(sc);
1701 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1702 lagg_clrmulti(lp);
1703 lagg_setmulti(lp);
1704 }
1705 LAGG_XUNLOCK(sc);
1706 error = 0;
1707 break;
1708 case SIOCSIFMEDIA:
1709 case SIOCGIFMEDIA:
1710 if (ifp->if_type == IFT_INFINIBAND)
1711 error = EINVAL;
1712 else
1713 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1714 break;
1715
1716 case SIOCSIFCAP:
1717 case SIOCSIFCAPNV:
1718 LAGG_XLOCK(sc);
1719 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1720 if (lp->lp_ioctl != NULL)
1721 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
1722 }
1723 lagg_capabilities(sc);
1724 LAGG_XUNLOCK(sc);
1725 VLAN_CAPABILITIES(ifp);
1726 error = 0;
1727 break;
1728
1729 case SIOCGIFCAPNV:
1730 error = 0;
1731 break;
1732
1733 case SIOCSIFMTU:
1734 LAGG_XLOCK(sc);
1735 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1736 if (lp->lp_ioctl != NULL)
1737 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
1738 else
1739 error = EINVAL;
1740 if (error != 0) {
1741 if_printf(ifp,
1742 "failed to change MTU to %d on port %s, "
1743 "reverting all ports to original MTU (%d)\n",
1744 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu);
1745 break;
1746 }
1747 }
1748 if (error == 0) {
1749 ifp->if_mtu = ifr->ifr_mtu;
1750 } else {
1751 /* set every port back to the original MTU */
1752 ifr->ifr_mtu = ifp->if_mtu;
1753 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1754 if (lp->lp_ioctl != NULL)
1755 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
1756 }
1757 }
1758 lagg_capabilities(sc);
1759 LAGG_XUNLOCK(sc);
1760 VLAN_CAPABILITIES(ifp);
1761 break;
1762
1763 default:
1764 error = ether_ioctl(ifp, cmd, data);
1765 break;
1766 }
1767 return (error);
1768 }
1769
1770 #if defined(KERN_TLS) || defined(RATELIMIT)
1771 #ifdef RATELIMIT
1772 static const struct if_snd_tag_sw lagg_snd_tag_ul_sw = {
1773 .snd_tag_modify = lagg_snd_tag_modify,
1774 .snd_tag_query = lagg_snd_tag_query,
1775 .snd_tag_free = lagg_snd_tag_free,
1776 .next_snd_tag = lagg_next_snd_tag,
1777 .type = IF_SND_TAG_TYPE_UNLIMITED
1778 };
1779
1780 static const struct if_snd_tag_sw lagg_snd_tag_rl_sw = {
1781 .snd_tag_modify = lagg_snd_tag_modify,
1782 .snd_tag_query = lagg_snd_tag_query,
1783 .snd_tag_free = lagg_snd_tag_free,
1784 .next_snd_tag = lagg_next_snd_tag,
1785 .type = IF_SND_TAG_TYPE_RATE_LIMIT
1786 };
1787 #endif
1788
1789 #ifdef KERN_TLS
1790 static const struct if_snd_tag_sw lagg_snd_tag_tls_sw = {
1791 .snd_tag_modify = lagg_snd_tag_modify,
1792 .snd_tag_query = lagg_snd_tag_query,
1793 .snd_tag_free = lagg_snd_tag_free,
1794 .next_snd_tag = lagg_next_snd_tag,
1795 .type = IF_SND_TAG_TYPE_TLS
1796 };
1797
1798 #ifdef RATELIMIT
1799 static const struct if_snd_tag_sw lagg_snd_tag_tls_rl_sw = {
1800 .snd_tag_modify = lagg_snd_tag_modify,
1801 .snd_tag_query = lagg_snd_tag_query,
1802 .snd_tag_free = lagg_snd_tag_free,
1803 .next_snd_tag = lagg_next_snd_tag,
1804 .type = IF_SND_TAG_TYPE_TLS_RATE_LIMIT
1805 };
1806 #endif
1807 #endif
1808
1809 static inline struct lagg_snd_tag *
mst_to_lst(struct m_snd_tag * mst)1810 mst_to_lst(struct m_snd_tag *mst)
1811 {
1812
1813 return (__containerof(mst, struct lagg_snd_tag, com));
1814 }
1815
1816 /*
1817 * Look up the port used by a specific flow. This only works for lagg
1818 * protocols with deterministic port mappings (e.g. not roundrobin).
1819 * In addition protocols which use a hash to map flows to ports must
1820 * be configured to use the mbuf flowid rather than hashing packet
1821 * contents.
1822 */
1823 static struct lagg_port *
lookup_snd_tag_port(struct ifnet * ifp,uint32_t flowid,uint32_t flowtype,uint8_t numa_domain)1824 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype,
1825 uint8_t numa_domain)
1826 {
1827 struct lagg_softc *sc;
1828 struct lagg_port *lp;
1829 struct lagg_lb *lb;
1830 uint32_t hash, p;
1831 int err;
1832
1833 sc = ifp->if_softc;
1834
1835 switch (sc->sc_proto) {
1836 case LAGG_PROTO_FAILOVER:
1837 return (lagg_link_active(sc, sc->sc_primary));
1838 case LAGG_PROTO_LOADBALANCE:
1839 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 ||
1840 flowtype == M_HASHTYPE_NONE)
1841 return (NULL);
1842 p = flowid >> sc->flowid_shift;
1843 p %= sc->sc_count;
1844 lb = (struct lagg_lb *)sc->sc_psc;
1845 lp = lb->lb_ports[p];
1846 return (lagg_link_active(sc, lp));
1847 case LAGG_PROTO_LACP:
1848 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 ||
1849 flowtype == M_HASHTYPE_NONE)
1850 return (NULL);
1851 hash = flowid >> sc->flowid_shift;
1852 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err));
1853 default:
1854 return (NULL);
1855 }
1856 }
1857
1858 static int
lagg_snd_tag_alloc(struct ifnet * ifp,union if_snd_tag_alloc_params * params,struct m_snd_tag ** ppmt)1859 lagg_snd_tag_alloc(struct ifnet *ifp,
1860 union if_snd_tag_alloc_params *params,
1861 struct m_snd_tag **ppmt)
1862 {
1863 struct epoch_tracker et;
1864 const struct if_snd_tag_sw *sw;
1865 struct lagg_snd_tag *lst;
1866 struct lagg_port *lp;
1867 struct ifnet *lp_ifp;
1868 struct m_snd_tag *mst;
1869 int error;
1870
1871 switch (params->hdr.type) {
1872 #ifdef RATELIMIT
1873 case IF_SND_TAG_TYPE_UNLIMITED:
1874 sw = &lagg_snd_tag_ul_sw;
1875 break;
1876 case IF_SND_TAG_TYPE_RATE_LIMIT:
1877 sw = &lagg_snd_tag_rl_sw;
1878 break;
1879 #endif
1880 #ifdef KERN_TLS
1881 case IF_SND_TAG_TYPE_TLS:
1882 sw = &lagg_snd_tag_tls_sw;
1883 break;
1884 case IF_SND_TAG_TYPE_TLS_RX:
1885 /* Return tag from port interface directly. */
1886 sw = NULL;
1887 break;
1888 #ifdef RATELIMIT
1889 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT:
1890 sw = &lagg_snd_tag_tls_rl_sw;
1891 break;
1892 #endif
1893 #endif
1894 default:
1895 return (EOPNOTSUPP);
1896 }
1897
1898 NET_EPOCH_ENTER(et);
1899 lp = lookup_snd_tag_port(ifp, params->hdr.flowid,
1900 params->hdr.flowtype, params->hdr.numa_domain);
1901 if (lp == NULL) {
1902 NET_EPOCH_EXIT(et);
1903 return (EOPNOTSUPP);
1904 }
1905 if (lp->lp_ifp == NULL) {
1906 NET_EPOCH_EXIT(et);
1907 return (EOPNOTSUPP);
1908 }
1909 lp_ifp = lp->lp_ifp;
1910 if_ref(lp_ifp);
1911 NET_EPOCH_EXIT(et);
1912
1913 if (sw != NULL) {
1914 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT);
1915 if (lst == NULL) {
1916 if_rele(lp_ifp);
1917 return (ENOMEM);
1918 }
1919 } else
1920 lst = NULL;
1921
1922 error = m_snd_tag_alloc(lp_ifp, params, &mst);
1923 if_rele(lp_ifp);
1924 if (error) {
1925 free(lst, M_LAGG);
1926 return (error);
1927 }
1928
1929 if (sw != NULL) {
1930 m_snd_tag_init(&lst->com, ifp, sw);
1931 lst->tag = mst;
1932
1933 *ppmt = &lst->com;
1934 } else
1935 *ppmt = mst;
1936
1937 return (0);
1938 }
1939
1940 static struct m_snd_tag *
lagg_next_snd_tag(struct m_snd_tag * mst)1941 lagg_next_snd_tag(struct m_snd_tag *mst)
1942 {
1943 struct lagg_snd_tag *lst;
1944
1945 lst = mst_to_lst(mst);
1946 return (lst->tag);
1947 }
1948
1949 static int
lagg_snd_tag_modify(struct m_snd_tag * mst,union if_snd_tag_modify_params * params)1950 lagg_snd_tag_modify(struct m_snd_tag *mst,
1951 union if_snd_tag_modify_params *params)
1952 {
1953 struct lagg_snd_tag *lst;
1954
1955 lst = mst_to_lst(mst);
1956 return (lst->tag->sw->snd_tag_modify(lst->tag, params));
1957 }
1958
1959 static int
lagg_snd_tag_query(struct m_snd_tag * mst,union if_snd_tag_query_params * params)1960 lagg_snd_tag_query(struct m_snd_tag *mst,
1961 union if_snd_tag_query_params *params)
1962 {
1963 struct lagg_snd_tag *lst;
1964
1965 lst = mst_to_lst(mst);
1966 return (lst->tag->sw->snd_tag_query(lst->tag, params));
1967 }
1968
1969 static void
lagg_snd_tag_free(struct m_snd_tag * mst)1970 lagg_snd_tag_free(struct m_snd_tag *mst)
1971 {
1972 struct lagg_snd_tag *lst;
1973
1974 lst = mst_to_lst(mst);
1975 m_snd_tag_rele(lst->tag);
1976 free(lst, M_LAGG);
1977 }
1978
1979 static void
lagg_ratelimit_query(struct ifnet * ifp __unused,struct if_ratelimit_query_results * q)1980 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q)
1981 {
1982 /*
1983 * For lagg, we have an indirect
1984 * interface. The caller needs to
1985 * get a ratelimit tag on the actual
1986 * interface the flow will go on.
1987 */
1988 q->rate_table = NULL;
1989 q->flags = RT_IS_INDIRECT;
1990 q->max_flows = 0;
1991 q->number_of_rates = 0;
1992 }
1993 #endif
1994
1995 static int
lagg_setmulti(struct lagg_port * lp)1996 lagg_setmulti(struct lagg_port *lp)
1997 {
1998 struct lagg_softc *sc = lp->lp_softc;
1999 struct ifnet *ifp = lp->lp_ifp;
2000 struct ifnet *scifp = sc->sc_ifp;
2001 struct lagg_mc *mc;
2002 struct ifmultiaddr *ifma;
2003 int error;
2004
2005 IF_ADDR_WLOCK(scifp);
2006 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
2007 if (ifma->ifma_addr->sa_family != AF_LINK)
2008 continue;
2009 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT);
2010 if (mc == NULL) {
2011 IF_ADDR_WUNLOCK(scifp);
2012 return (ENOMEM);
2013 }
2014 bcopy(ifma->ifma_addr, &mc->mc_addr, ifma->ifma_addr->sa_len);
2015 mc->mc_addr.sdl_index = ifp->if_index;
2016 mc->mc_ifma = NULL;
2017 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
2018 }
2019 IF_ADDR_WUNLOCK(scifp);
2020 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
2021 error = if_addmulti(ifp,
2022 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
2023 if (error)
2024 return (error);
2025 }
2026 return (0);
2027 }
2028
2029 static int
lagg_clrmulti(struct lagg_port * lp)2030 lagg_clrmulti(struct lagg_port *lp)
2031 {
2032 struct lagg_mc *mc;
2033
2034 LAGG_XLOCK_ASSERT(lp->lp_softc);
2035 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
2036 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
2037 if (mc->mc_ifma && lp->lp_detaching == 0)
2038 if_delmulti_ifma(mc->mc_ifma);
2039 free(mc, M_LAGG);
2040 }
2041 return (0);
2042 }
2043
2044 static void
lagg_setcaps(struct lagg_port * lp,int cap,int cap2)2045 lagg_setcaps(struct lagg_port *lp, int cap, int cap2)
2046 {
2047 struct ifreq ifr;
2048 struct siocsifcapnv_driver_data drv_ioctl_data;
2049
2050 if (lp->lp_ifp->if_capenable == cap &&
2051 lp->lp_ifp->if_capenable2 == cap2)
2052 return;
2053 if (lp->lp_ioctl == NULL)
2054 return;
2055 /* XXX */
2056 if ((lp->lp_ifp->if_capabilities & IFCAP_NV) != 0) {
2057 drv_ioctl_data.reqcap = cap;
2058 drv_ioctl_data.reqcap2 = cap2;
2059 drv_ioctl_data.nvcap = NULL;
2060 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAPNV,
2061 (caddr_t)&drv_ioctl_data);
2062 } else {
2063 ifr.ifr_reqcap = cap;
2064 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr);
2065 }
2066 }
2067
2068 /* Handle a ref counted flag that should be set on the lagg port as well */
2069 static int
lagg_setflag(struct lagg_port * lp,int flag,int status,int (* func)(struct ifnet *,int))2070 lagg_setflag(struct lagg_port *lp, int flag, int status,
2071 int (*func)(struct ifnet *, int))
2072 {
2073 struct lagg_softc *sc = lp->lp_softc;
2074 struct ifnet *scifp = sc->sc_ifp;
2075 struct ifnet *ifp = lp->lp_ifp;
2076 int error;
2077
2078 LAGG_XLOCK_ASSERT(sc);
2079
2080 status = status ? (scifp->if_flags & flag) : 0;
2081 /* Now "status" contains the flag value or 0 */
2082
2083 /*
2084 * See if recorded ports status is different from what
2085 * we want it to be. If it is, flip it. We record ports
2086 * status in lp_ifflags so that we won't clear ports flag
2087 * we haven't set. In fact, we don't clear or set ports
2088 * flags directly, but get or release references to them.
2089 * That's why we can be sure that recorded flags still are
2090 * in accord with actual ports flags.
2091 */
2092 if (status != (lp->lp_ifflags & flag)) {
2093 error = (*func)(ifp, status);
2094 if (error)
2095 return (error);
2096 lp->lp_ifflags &= ~flag;
2097 lp->lp_ifflags |= status;
2098 }
2099 return (0);
2100 }
2101
2102 /*
2103 * Handle IFF_* flags that require certain changes on the lagg port
2104 * if "status" is true, update ports flags respective to the lagg
2105 * if "status" is false, forcedly clear the flags set on port.
2106 */
2107 static int
lagg_setflags(struct lagg_port * lp,int status)2108 lagg_setflags(struct lagg_port *lp, int status)
2109 {
2110 int error, i;
2111
2112 for (i = 0; lagg_pflags[i].flag; i++) {
2113 error = lagg_setflag(lp, lagg_pflags[i].flag,
2114 status, lagg_pflags[i].func);
2115 if (error)
2116 return (error);
2117 }
2118 return (0);
2119 }
2120
2121 static int
lagg_transmit_ethernet(struct ifnet * ifp,struct mbuf * m)2122 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m)
2123 {
2124 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2125
2126 NET_EPOCH_ASSERT();
2127 #if defined(KERN_TLS) || defined(RATELIMIT)
2128 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG)
2129 MPASS(m->m_pkthdr.snd_tag->ifp == ifp);
2130 #endif
2131 /* We need a Tx algorithm and at least one port */
2132 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
2133 m_freem(m);
2134 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2135 return (ENXIO);
2136 }
2137
2138 ETHER_BPF_MTAP(ifp, m);
2139
2140 return (lagg_proto_start(sc, m));
2141 }
2142
2143 static int
lagg_transmit_infiniband(struct ifnet * ifp,struct mbuf * m)2144 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m)
2145 {
2146 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2147
2148 NET_EPOCH_ASSERT();
2149 #if defined(KERN_TLS) || defined(RATELIMIT)
2150 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG)
2151 MPASS(m->m_pkthdr.snd_tag->ifp == ifp);
2152 #endif
2153 /* We need a Tx algorithm and at least one port */
2154 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
2155 m_freem(m);
2156 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2157 return (ENXIO);
2158 }
2159
2160 infiniband_bpf_mtap(ifp, m);
2161
2162 return (lagg_proto_start(sc, m));
2163 }
2164
2165 /*
2166 * The ifp->if_qflush entry point for lagg(4) is no-op.
2167 */
2168 static void
lagg_qflush(struct ifnet * ifp __unused)2169 lagg_qflush(struct ifnet *ifp __unused)
2170 {
2171 }
2172
2173 static struct mbuf *
lagg_input_ethernet(struct ifnet * ifp,struct mbuf * m)2174 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m)
2175 {
2176 struct lagg_port *lp = ifp->if_lagg;
2177 struct lagg_softc *sc = lp->lp_softc;
2178 struct ifnet *scifp = sc->sc_ifp;
2179
2180 NET_EPOCH_ASSERT();
2181 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
2182 lp->lp_detaching != 0 ||
2183 sc->sc_proto == LAGG_PROTO_NONE) {
2184 m_freem(m);
2185 return (NULL);
2186 }
2187
2188 m = lagg_proto_input(sc, lp, m);
2189 if (m != NULL) {
2190 ETHER_BPF_MTAP(scifp, m);
2191
2192 if ((scifp->if_flags & IFF_MONITOR) != 0) {
2193 m_freem(m);
2194 m = NULL;
2195 }
2196 }
2197
2198 #ifdef DEV_NETMAP
2199 if (m != NULL && scifp->if_capenable & IFCAP_NETMAP) {
2200 scifp->if_input(scifp, m);
2201 m = NULL;
2202 }
2203 #endif /* DEV_NETMAP */
2204
2205 return (m);
2206 }
2207
2208 static struct mbuf *
lagg_input_infiniband(struct ifnet * ifp,struct mbuf * m)2209 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m)
2210 {
2211 struct lagg_port *lp = ifp->if_lagg;
2212 struct lagg_softc *sc = lp->lp_softc;
2213 struct ifnet *scifp = sc->sc_ifp;
2214
2215 NET_EPOCH_ASSERT();
2216 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
2217 lp->lp_detaching != 0 ||
2218 sc->sc_proto == LAGG_PROTO_NONE) {
2219 m_freem(m);
2220 return (NULL);
2221 }
2222
2223 m = lagg_proto_input(sc, lp, m);
2224 if (m != NULL) {
2225 infiniband_bpf_mtap(scifp, m);
2226
2227 if ((scifp->if_flags & IFF_MONITOR) != 0) {
2228 m_freem(m);
2229 m = NULL;
2230 }
2231 }
2232
2233 return (m);
2234 }
2235
2236 static int
lagg_media_change(struct ifnet * ifp)2237 lagg_media_change(struct ifnet *ifp)
2238 {
2239 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2240
2241 if (sc->sc_ifflags & IFF_DEBUG)
2242 printf("%s\n", __func__);
2243
2244 /* Ignore */
2245 return (0);
2246 }
2247
2248 static void
lagg_media_status(struct ifnet * ifp,struct ifmediareq * imr)2249 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
2250 {
2251 struct epoch_tracker et;
2252 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2253 struct lagg_port *lp;
2254
2255 imr->ifm_status = IFM_AVALID;
2256 imr->ifm_active = IFM_ETHER | IFM_AUTO;
2257
2258 NET_EPOCH_ENTER(et);
2259 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
2260 if (LAGG_PORTACTIVE(lp))
2261 imr->ifm_status |= IFM_ACTIVE;
2262 }
2263 NET_EPOCH_EXIT(et);
2264 }
2265
2266 static void
lagg_linkstate(struct lagg_softc * sc)2267 lagg_linkstate(struct lagg_softc *sc)
2268 {
2269 struct epoch_tracker et;
2270 struct lagg_port *lp;
2271 int new_link = LINK_STATE_DOWN;
2272 uint64_t speed;
2273
2274 LAGG_XLOCK_ASSERT(sc);
2275
2276 /* LACP handles link state itself */
2277 if (sc->sc_proto == LAGG_PROTO_LACP)
2278 return;
2279
2280 /* Our link is considered up if at least one of our ports is active */
2281 NET_EPOCH_ENTER(et);
2282 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
2283 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) {
2284 new_link = LINK_STATE_UP;
2285 break;
2286 }
2287 }
2288 NET_EPOCH_EXIT(et);
2289 if_link_state_change(sc->sc_ifp, new_link);
2290
2291 /* Update if_baudrate to reflect the max possible speed */
2292 switch (sc->sc_proto) {
2293 case LAGG_PROTO_FAILOVER:
2294 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
2295 sc->sc_primary->lp_ifp->if_baudrate : 0;
2296 break;
2297 case LAGG_PROTO_ROUNDROBIN:
2298 case LAGG_PROTO_LOADBALANCE:
2299 case LAGG_PROTO_BROADCAST:
2300 speed = 0;
2301 NET_EPOCH_ENTER(et);
2302 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2303 speed += lp->lp_ifp->if_baudrate;
2304 NET_EPOCH_EXIT(et);
2305 sc->sc_ifp->if_baudrate = speed;
2306 break;
2307 case LAGG_PROTO_LACP:
2308 /* LACP updates if_baudrate itself */
2309 break;
2310 }
2311 }
2312
2313 static void
lagg_port_state(struct ifnet * ifp,int state)2314 lagg_port_state(struct ifnet *ifp, int state)
2315 {
2316 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
2317 struct lagg_softc *sc = NULL;
2318
2319 if (lp != NULL)
2320 sc = lp->lp_softc;
2321 if (sc == NULL)
2322 return;
2323
2324 LAGG_XLOCK(sc);
2325 lagg_linkstate(sc);
2326 lagg_proto_linkstate(sc, lp);
2327 LAGG_XUNLOCK(sc);
2328 }
2329
2330 struct lagg_port *
lagg_link_active(struct lagg_softc * sc,struct lagg_port * lp)2331 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
2332 {
2333 struct lagg_port *lp_next, *rval = NULL;
2334
2335 /*
2336 * Search a port which reports an active link state.
2337 */
2338
2339 #ifdef INVARIANTS
2340 /*
2341 * This is called with either in the network epoch
2342 * or with LAGG_XLOCK(sc) held.
2343 */
2344 if (!in_epoch(net_epoch_preempt))
2345 LAGG_XLOCK_ASSERT(sc);
2346 #endif
2347
2348 if (lp == NULL)
2349 goto search;
2350 if (LAGG_PORTACTIVE(lp)) {
2351 rval = lp;
2352 goto found;
2353 }
2354 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL &&
2355 LAGG_PORTACTIVE(lp_next)) {
2356 rval = lp_next;
2357 goto found;
2358 }
2359
2360 search:
2361 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2362 if (LAGG_PORTACTIVE(lp_next)) {
2363 return (lp_next);
2364 }
2365 }
2366 found:
2367 return (rval);
2368 }
2369
2370 int
lagg_enqueue(struct ifnet * ifp,struct mbuf * m)2371 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
2372 {
2373
2374 #if defined(KERN_TLS) || defined(RATELIMIT)
2375 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) {
2376 struct lagg_snd_tag *lst;
2377 struct m_snd_tag *mst;
2378
2379 mst = m->m_pkthdr.snd_tag;
2380 lst = mst_to_lst(mst);
2381 if (lst->tag->ifp != ifp) {
2382 m_freem(m);
2383 return (EAGAIN);
2384 }
2385 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag);
2386 m_snd_tag_rele(mst);
2387 }
2388 #endif
2389 return (ifp->if_transmit)(ifp, m);
2390 }
2391
2392 /*
2393 * Simple round robin aggregation
2394 */
2395 static void
lagg_rr_attach(struct lagg_softc * sc)2396 lagg_rr_attach(struct lagg_softc *sc)
2397 {
2398 sc->sc_seq = 0;
2399 sc->sc_stride = 1;
2400 }
2401
2402 static int
lagg_rr_start(struct lagg_softc * sc,struct mbuf * m)2403 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
2404 {
2405 struct lagg_port *lp;
2406 uint32_t p;
2407
2408 p = atomic_fetchadd_32(&sc->sc_seq, 1);
2409 p /= sc->sc_stride;
2410 p %= sc->sc_count;
2411 lp = CK_SLIST_FIRST(&sc->sc_ports);
2412
2413 while (p--)
2414 lp = CK_SLIST_NEXT(lp, lp_entries);
2415
2416 /*
2417 * Check the port's link state. This will return the next active
2418 * port if the link is down or the port is NULL.
2419 */
2420 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2421 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2422 m_freem(m);
2423 return (ENETDOWN);
2424 }
2425
2426 /* Send mbuf */
2427 return (lagg_enqueue(lp->lp_ifp, m));
2428 }
2429
2430 /*
2431 * Broadcast mode
2432 */
2433 static int
lagg_bcast_start(struct lagg_softc * sc,struct mbuf * m)2434 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m)
2435 {
2436 int errors = 0;
2437 int ret;
2438 struct lagg_port *lp, *last = NULL;
2439 struct mbuf *m0;
2440
2441 NET_EPOCH_ASSERT();
2442 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
2443 if (!LAGG_PORTACTIVE(lp))
2444 continue;
2445
2446 if (last != NULL) {
2447 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT);
2448 if (m0 == NULL) {
2449 ret = ENOBUFS;
2450 errors++;
2451 break;
2452 }
2453 lagg_enqueue(last->lp_ifp, m0);
2454 }
2455 last = lp;
2456 }
2457
2458 if (last == NULL) {
2459 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2460 m_freem(m);
2461 return (ENOENT);
2462 }
2463 if ((last = lagg_link_active(sc, last)) == NULL) {
2464 errors++;
2465 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors);
2466 m_freem(m);
2467 return (ENETDOWN);
2468 }
2469
2470 ret = lagg_enqueue(last->lp_ifp, m);
2471 if (errors != 0)
2472 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors);
2473
2474 return (ret);
2475 }
2476
2477 /*
2478 * Active failover
2479 */
2480 static int
lagg_fail_start(struct lagg_softc * sc,struct mbuf * m)2481 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
2482 {
2483 struct lagg_port *lp;
2484
2485 /* Use the master port if active or the next available port */
2486 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
2487 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2488 m_freem(m);
2489 return (ENETDOWN);
2490 }
2491
2492 /* Send mbuf */
2493 return (lagg_enqueue(lp->lp_ifp, m));
2494 }
2495
2496 static struct mbuf *
lagg_fail_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)2497 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2498 {
2499 struct ifnet *ifp = sc->sc_ifp;
2500 struct lagg_port *tmp_tp;
2501
2502 if (lp == sc->sc_primary || V_lagg_failover_rx_all) {
2503 m->m_pkthdr.rcvif = ifp;
2504 return (m);
2505 }
2506
2507 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
2508 tmp_tp = lagg_link_active(sc, sc->sc_primary);
2509 /*
2510 * If tmp_tp is null, we've received a packet when all
2511 * our links are down. Weird, but process it anyways.
2512 */
2513 if (tmp_tp == NULL || tmp_tp == lp) {
2514 m->m_pkthdr.rcvif = ifp;
2515 return (m);
2516 }
2517 }
2518
2519 m_freem(m);
2520 return (NULL);
2521 }
2522
2523 /*
2524 * Loadbalancing
2525 */
2526 static void
lagg_lb_attach(struct lagg_softc * sc)2527 lagg_lb_attach(struct lagg_softc *sc)
2528 {
2529 struct lagg_port *lp;
2530 struct lagg_lb *lb;
2531
2532 LAGG_XLOCK_ASSERT(sc);
2533 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO);
2534 lb->lb_key = m_ether_tcpip_hash_init();
2535 sc->sc_psc = lb;
2536
2537 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2538 lagg_lb_port_create(lp);
2539 }
2540
2541 static void
lagg_lb_detach(struct lagg_softc * sc)2542 lagg_lb_detach(struct lagg_softc *sc)
2543 {
2544 struct lagg_lb *lb;
2545
2546 lb = (struct lagg_lb *)sc->sc_psc;
2547 if (lb != NULL)
2548 free(lb, M_LAGG);
2549 }
2550
2551 static int
lagg_lb_porttable(struct lagg_softc * sc,struct lagg_port * lp)2552 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
2553 {
2554 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2555 struct lagg_port *lp_next;
2556 int i = 0, rv;
2557
2558 rv = 0;
2559 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
2560 LAGG_XLOCK_ASSERT(sc);
2561 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2562 if (lp_next == lp)
2563 continue;
2564 if (i >= LAGG_MAX_PORTS) {
2565 rv = EINVAL;
2566 break;
2567 }
2568 if (sc->sc_ifflags & IFF_DEBUG)
2569 printf("%s: port %s at index %d\n",
2570 sc->sc_ifname, lp_next->lp_ifp->if_xname, i);
2571 lb->lb_ports[i++] = lp_next;
2572 }
2573
2574 return (rv);
2575 }
2576
2577 static int
lagg_lb_port_create(struct lagg_port * lp)2578 lagg_lb_port_create(struct lagg_port *lp)
2579 {
2580 struct lagg_softc *sc = lp->lp_softc;
2581 return (lagg_lb_porttable(sc, NULL));
2582 }
2583
2584 static void
lagg_lb_port_destroy(struct lagg_port * lp)2585 lagg_lb_port_destroy(struct lagg_port *lp)
2586 {
2587 struct lagg_softc *sc = lp->lp_softc;
2588 lagg_lb_porttable(sc, lp);
2589 }
2590
2591 static int
lagg_lb_start(struct lagg_softc * sc,struct mbuf * m)2592 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
2593 {
2594 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2595 struct lagg_port *lp = NULL;
2596 uint32_t p = 0;
2597
2598 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
2599 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
2600 p = m->m_pkthdr.flowid >> sc->flowid_shift;
2601 else
2602 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key);
2603 p %= sc->sc_count;
2604 lp = lb->lb_ports[p];
2605
2606 /*
2607 * Check the port's link state. This will return the next active
2608 * port if the link is down or the port is NULL.
2609 */
2610 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2611 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2612 m_freem(m);
2613 return (ENETDOWN);
2614 }
2615
2616 /* Send mbuf */
2617 return (lagg_enqueue(lp->lp_ifp, m));
2618 }
2619
2620 /*
2621 * 802.3ad LACP
2622 */
2623 static void
lagg_lacp_attach(struct lagg_softc * sc)2624 lagg_lacp_attach(struct lagg_softc *sc)
2625 {
2626 struct lagg_port *lp;
2627
2628 lacp_attach(sc);
2629 LAGG_XLOCK_ASSERT(sc);
2630 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2631 lacp_port_create(lp);
2632 }
2633
2634 static void
lagg_lacp_detach(struct lagg_softc * sc)2635 lagg_lacp_detach(struct lagg_softc *sc)
2636 {
2637 struct lagg_port *lp;
2638 void *psc;
2639
2640 LAGG_XLOCK_ASSERT(sc);
2641 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2642 lacp_port_destroy(lp);
2643
2644 psc = sc->sc_psc;
2645 sc->sc_psc = NULL;
2646 lacp_detach(psc);
2647 }
2648
2649 static void
lagg_lacp_lladdr(struct lagg_softc * sc)2650 lagg_lacp_lladdr(struct lagg_softc *sc)
2651 {
2652 struct lagg_port *lp;
2653
2654 LAGG_SXLOCK_ASSERT(sc);
2655
2656 /* purge all the lacp ports */
2657 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2658 lacp_port_destroy(lp);
2659
2660 /* add them back in */
2661 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2662 lacp_port_create(lp);
2663 }
2664
2665 static int
lagg_lacp_start(struct lagg_softc * sc,struct mbuf * m)2666 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
2667 {
2668 struct lagg_port *lp;
2669 int err;
2670
2671 lp = lacp_select_tx_port(sc, m, &err);
2672 if (lp == NULL) {
2673 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2674 m_freem(m);
2675 return (err);
2676 }
2677
2678 /* Send mbuf */
2679 return (lagg_enqueue(lp->lp_ifp, m));
2680 }
2681
2682 static struct mbuf *
lagg_lacp_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)2683 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2684 {
2685 struct ifnet *ifp = sc->sc_ifp;
2686 struct ether_header *eh;
2687 u_short etype;
2688
2689 eh = mtod(m, struct ether_header *);
2690 etype = ntohs(eh->ether_type);
2691
2692 /* Tap off LACP control messages */
2693 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
2694 m = lacp_input(lp, m);
2695 if (m == NULL)
2696 return (NULL);
2697 }
2698
2699 /*
2700 * If the port is not collecting or not in the active aggregator then
2701 * free and return.
2702 */
2703 if (!lacp_iscollecting(lp) || !lacp_isactive(lp)) {
2704 m_freem(m);
2705 return (NULL);
2706 }
2707
2708 m->m_pkthdr.rcvif = ifp;
2709 return (m);
2710 }
2711
2712 /* Default input */
2713 static struct mbuf *
lagg_default_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)2714 lagg_default_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2715 {
2716 struct ifnet *ifp = sc->sc_ifp;
2717
2718 /* Just pass in the packet to our lagg device */
2719 m->m_pkthdr.rcvif = ifp;
2720
2721 return (m);
2722 }
2723