xref: /freebsd/sys/net/if_infiniband.c (revision d0b2dbfa0ecf2bbc9709efc5e20baf8e4b44bbbf) 
1 /*-
2  * Copyright (c) 2020 Mellanox Technologies. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  */
25 
26 #include "opt_inet.h"
27 #include "opt_inet6.h"
28 #include "opt_kbd.h"
29 
30 #include <sys/cdefs.h>
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/devctl.h>
34 #include <sys/eventhandler.h>
35 #include <sys/kernel.h>
36 #include <sys/mbuf.h>
37 #include <sys/module.h>
38 #include <sys/socket.h>
39 #include <sys/sysctl.h>
40 #ifdef KDB
41 #include <sys/kdb.h>
42 #endif
43 
44 #include <net/bpf.h>
45 #include <net/ethernet.h>
46 #include <net/infiniband.h>
47 #include <net/if.h>
48 #include <net/if_var.h>
49 #include <net/if_private.h>
50 #include <net/if_dl.h>
51 #include <net/if_media.h>
52 #include <net/if_lagg.h>
53 #include <net/if_llatbl.h>
54 #include <net/if_types.h>
55 #include <net/netisr.h>
56 #include <net/route.h>
57 #include <netinet/if_ether.h>
58 #include <netinet/in.h>
59 #include <netinet/ip6.h>
60 #include <netinet6/in6_var.h>
61 #include <netinet6/nd6.h>
62 
63 #include <security/mac/mac_framework.h>
64 
65 /* if_lagg(4) support */
66 struct mbuf *(*lagg_input_infiniband_p)(struct ifnet *, struct mbuf *);
67 
68 #ifdef INET
69 static inline void
70 infiniband_ipv4_multicast_map(uint32_t addr,
71     const uint8_t *broadcast, uint8_t *buf)
72 {
73 	uint8_t scope;
74 
75 	addr = ntohl(addr);
76 	scope = broadcast[5] & 0xF;
77 
78 	buf[0] = 0;
79 	buf[1] = 0xff;
80 	buf[2] = 0xff;
81 	buf[3] = 0xff;
82 	buf[4] = 0xff;
83 	buf[5] = 0x10 | scope;
84 	buf[6] = 0x40;
85 	buf[7] = 0x1b;
86 	buf[8] = broadcast[8];
87 	buf[9] = broadcast[9];
88 	buf[10] = 0;
89 	buf[11] = 0;
90 	buf[12] = 0;
91 	buf[13] = 0;
92 	buf[14] = 0;
93 	buf[15] = 0;
94 	buf[16] = (addr >> 24) & 0xff;
95 	buf[17] = (addr >> 16) & 0xff;
96 	buf[18] = (addr >> 8) & 0xff;
97 	buf[19] = addr & 0xff;
98 }
99 #endif
100 
101 #ifdef INET6
102 static inline void
103 infiniband_ipv6_multicast_map(const struct in6_addr *addr,
104     const uint8_t *broadcast, uint8_t *buf)
105 {
106 	uint8_t scope;
107 
108 	scope = broadcast[5] & 0xF;
109 
110 	buf[0] = 0;
111 	buf[1] = 0xff;
112 	buf[2] = 0xff;
113 	buf[3] = 0xff;
114 	buf[4] = 0xff;
115 	buf[5] = 0x10 | scope;
116 	buf[6] = 0x60;
117 	buf[7] = 0x1b;
118 	buf[8] = broadcast[8];
119 	buf[9] = broadcast[9];
120 	memcpy(&buf[10], &addr->s6_addr[6], 10);
121 }
122 #endif
123 
124 /*
125  * This is for clients that have an infiniband_header in the mbuf.
126  */
127 void
128 infiniband_bpf_mtap(struct ifnet *ifp, struct mbuf *mb)
129 {
130 	struct infiniband_header *ibh;
131 	struct ether_header eh;
132 
133 	if (!bpf_peers_present(ifp->if_bpf))
134 		return;
135 
136 	M_ASSERTVALID(mb);
137 	if (mb->m_len < sizeof(*ibh))
138 		return;
139 
140 	ibh = mtod(mb, struct infiniband_header *);
141 	eh.ether_type = ibh->ib_protocol;
142 	memset(eh.ether_shost, 0, ETHER_ADDR_LEN);
143 	memcpy(eh.ether_dhost, ibh->ib_hwaddr + 4, ETHER_ADDR_LEN);
144 	mb->m_data += sizeof(*ibh);
145 	mb->m_len -= sizeof(*ibh);
146 	mb->m_pkthdr.len -= sizeof(*ibh);
147 	bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
148 	mb->m_data -= sizeof(*ibh);
149 	mb->m_len += sizeof(*ibh);
150 	mb->m_pkthdr.len += sizeof(*ibh);
151 }
152 
153 static void
154 update_mbuf_csumflags(struct mbuf *src, struct mbuf *dst)
155 {
156 	int csum_flags = 0;
157 
158 	if (src->m_pkthdr.csum_flags & CSUM_IP)
159 		csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID);
160 	if (src->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
161 		csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR);
162 	if (src->m_pkthdr.csum_flags & CSUM_SCTP)
163 		csum_flags |= CSUM_SCTP_VALID;
164 	dst->m_pkthdr.csum_flags |= csum_flags;
165 	if (csum_flags & CSUM_DATA_VALID)
166 		dst->m_pkthdr.csum_data = 0xffff;
167 }
168 
169 /*
170  * Handle link-layer encapsulation requests.
171  */
172 static int
173 infiniband_requestencap(struct ifnet *ifp, struct if_encap_req *req)
174 {
175 	struct infiniband_header *ih;
176 	struct arphdr *ah;
177 	uint16_t etype;
178 	const uint8_t *lladdr;
179 
180 	if (req->rtype != IFENCAP_LL)
181 		return (EOPNOTSUPP);
182 
183 	if (req->bufsize < INFINIBAND_HDR_LEN)
184 		return (ENOMEM);
185 
186 	ih = (struct infiniband_header *)req->buf;
187 	lladdr = req->lladdr;
188 	req->lladdr_off = 0;
189 
190 	switch (req->family) {
191 	case AF_INET:
192 		etype = htons(ETHERTYPE_IP);
193 		break;
194 	case AF_INET6:
195 		etype = htons(ETHERTYPE_IPV6);
196 		break;
197 	case AF_ARP:
198 		ah = (struct arphdr *)req->hdata;
199 		ah->ar_hrd = htons(ARPHRD_INFINIBAND);
200 
201 		switch (ntohs(ah->ar_op)) {
202 		case ARPOP_REVREQUEST:
203 		case ARPOP_REVREPLY:
204 			etype = htons(ETHERTYPE_REVARP);
205 			break;
206 		case ARPOP_REQUEST:
207 		case ARPOP_REPLY:
208 		default:
209 			etype = htons(ETHERTYPE_ARP);
210 			break;
211 		}
212 
213 		if (req->flags & IFENCAP_FLAG_BROADCAST)
214 			lladdr = ifp->if_broadcastaddr;
215 		break;
216 	default:
217 		return (EAFNOSUPPORT);
218 	}
219 
220 	ih->ib_protocol = etype;
221 	ih->ib_reserved = 0;
222 	memcpy(ih->ib_hwaddr, lladdr, INFINIBAND_ADDR_LEN);
223 	req->bufsize = sizeof(struct infiniband_header);
224 
225 	return (0);
226 }
227 
228 static int
229 infiniband_resolve_addr(struct ifnet *ifp, struct mbuf *m,
230     const struct sockaddr *dst, struct route *ro, uint8_t *phdr,
231     uint32_t *pflags, struct llentry **plle)
232 {
233 #if defined(INET) || defined(INET6)
234 	struct infiniband_header *ih = (struct infiniband_header *)phdr;
235 #endif
236 	uint32_t lleflags = 0;
237 	int error = 0;
238 
239 	if (plle)
240 		*plle = NULL;
241 
242 	switch (dst->sa_family) {
243 #ifdef INET
244 	case AF_INET:
245 		if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) {
246 			error = arpresolve(ifp, 0, m, dst, phdr, &lleflags, plle);
247 		} else {
248 			if (m->m_flags & M_BCAST) {
249 				memcpy(ih->ib_hwaddr, ifp->if_broadcastaddr,
250 				    INFINIBAND_ADDR_LEN);
251 			} else {
252 				infiniband_ipv4_multicast_map(
253 				    ((const struct sockaddr_in *)dst)->sin_addr.s_addr,
254 				    ifp->if_broadcastaddr, ih->ib_hwaddr);
255 			}
256 			ih->ib_protocol = htons(ETHERTYPE_IP);
257 			ih->ib_reserved = 0;
258 		}
259 		break;
260 #endif
261 #ifdef INET6
262 	case AF_INET6:
263 		if ((m->m_flags & M_MCAST) == 0) {
264 			int af = RO_GET_FAMILY(ro, dst);
265 			error = nd6_resolve(ifp, LLE_SF(af, 0), m, dst, phdr,
266 			    &lleflags, plle);
267 		} else {
268 			infiniband_ipv6_multicast_map(
269 			    &((const struct sockaddr_in6 *)dst)->sin6_addr,
270 			    ifp->if_broadcastaddr, ih->ib_hwaddr);
271 			ih->ib_protocol = htons(ETHERTYPE_IPV6);
272 			ih->ib_reserved = 0;
273 		}
274 		break;
275 #endif
276 	default:
277 		if_printf(ifp, "can't handle af%d\n", dst->sa_family);
278 		if (m != NULL)
279 			m_freem(m);
280 		return (EAFNOSUPPORT);
281 	}
282 
283 	if (error == EHOSTDOWN) {
284 		if (ro != NULL && (ro->ro_flags & RT_HAS_GW) != 0)
285 			error = EHOSTUNREACH;
286 	}
287 
288 	if (error != 0)
289 		return (error);
290 
291 	*pflags = RT_MAY_LOOP;
292 	if (lleflags & LLE_IFADDR)
293 		*pflags |= RT_L2_ME;
294 
295 	return (0);
296 }
297 
298 /*
299  * Infiniband output routine.
300  */
301 static int
302 infiniband_output(struct ifnet *ifp, struct mbuf *m,
303     const struct sockaddr *dst, struct route *ro)
304 {
305 	uint8_t linkhdr[INFINIBAND_HDR_LEN];
306 	uint8_t *phdr;
307 	struct llentry *lle = NULL;
308 	struct infiniband_header *ih;
309 	int error = 0;
310 	int hlen;	/* link layer header length */
311 	uint32_t pflags;
312 	bool addref;
313 
314 	NET_EPOCH_ASSERT();
315 
316 	addref = false;
317 	phdr = NULL;
318 	pflags = 0;
319 	if (ro != NULL) {
320 		/* XXX BPF uses ro_prepend */
321 		if (ro->ro_prepend != NULL) {
322 			phdr = ro->ro_prepend;
323 			hlen = ro->ro_plen;
324 		} else if (!(m->m_flags & (M_BCAST | M_MCAST))) {
325 			if ((ro->ro_flags & RT_LLE_CACHE) != 0) {
326 				lle = ro->ro_lle;
327 				if (lle != NULL &&
328 				    (lle->la_flags & LLE_VALID) == 0) {
329 					LLE_FREE(lle);
330 					lle = NULL;	/* redundant */
331 					ro->ro_lle = NULL;
332 				}
333 				if (lle == NULL) {
334 					/* if we lookup, keep cache */
335 					addref = 1;
336 				} else
337 					/*
338 					 * Notify LLE code that
339 					 * the entry was used
340 					 * by datapath.
341 					 */
342 					llentry_provide_feedback(lle);
343 			}
344 			if (lle != NULL) {
345 				phdr = lle->r_linkdata;
346 				hlen = lle->r_hdrlen;
347 				pflags = lle->r_flags;
348 			}
349 		}
350 	}
351 
352 #ifdef MAC
353 	error = mac_ifnet_check_transmit(ifp, m);
354 	if (error)
355 		goto bad;
356 #endif
357 
358 	M_PROFILE(m);
359 	if (ifp->if_flags & IFF_MONITOR) {
360 		error = ENETDOWN;
361 		goto bad;
362 	}
363 	if (!((ifp->if_flags & IFF_UP) &&
364 	    (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
365 		error = ENETDOWN;
366 		goto bad;
367 	}
368 
369 	if (phdr == NULL) {
370 		/* No prepend data supplied. Try to calculate ourselves. */
371 		phdr = linkhdr;
372 		hlen = INFINIBAND_HDR_LEN;
373 		error = infiniband_resolve_addr(ifp, m, dst, ro, phdr, &pflags,
374 		    addref ? &lle : NULL);
375 		if (addref && lle != NULL)
376 			ro->ro_lle = lle;
377 		if (error != 0)
378 			return (error == EWOULDBLOCK ? 0 : error);
379 	}
380 
381 	if ((pflags & RT_L2_ME) != 0) {
382 		update_mbuf_csumflags(m, m);
383 		return (if_simloop(ifp, m, RO_GET_FAMILY(ro, dst), 0));
384 	}
385 
386 	/*
387 	 * Add local infiniband header. If no space in first mbuf,
388 	 * allocate another.
389 	 */
390 	M_PREPEND(m, INFINIBAND_HDR_LEN, M_NOWAIT);
391 	if (m == NULL) {
392 		error = ENOBUFS;
393 		goto bad;
394 	}
395 	if ((pflags & RT_HAS_HEADER) == 0) {
396 		ih = mtod(m, struct infiniband_header *);
397 		memcpy(ih, phdr, hlen);
398 	}
399 
400 	/*
401 	 * Queue message on interface, update output statistics if
402 	 * successful, and start output if interface not yet active.
403 	 */
404 	return (ifp->if_transmit(ifp, m));
405 bad:
406 	if (m != NULL)
407 		m_freem(m);
408 	return (error);
409 }
410 
411 /*
412  * Process a received Infiniband packet.
413  */
414 static void
415 infiniband_input(struct ifnet *ifp, struct mbuf *m)
416 {
417 	struct infiniband_header *ibh;
418 	struct epoch_tracker et;
419 	int isr;
420 	bool needs_epoch;
421 
422 	needs_epoch = (ifp->if_flags & IFF_NEEDSEPOCH);
423 #ifdef INVARIANTS
424 	/*
425 	 * This temporary code is here to prevent epoch unaware and unmarked
426 	 * drivers to panic the system.  Once all drivers are taken care of,
427 	 * the whole INVARIANTS block should go away.
428 	 */
429 	if (!needs_epoch && !in_epoch(net_epoch_preempt)) {
430 		static bool printedonce;
431 
432 		needs_epoch = true;
433 		if (!printedonce) {
434 			printedonce = true;
435 			if_printf(ifp, "called %s w/o net epoch! "
436 			    "PLEASE file a bug report.", __func__);
437 #ifdef KDB
438 			kdb_backtrace();
439 #endif
440 		}
441 	}
442 #endif
443 
444 	CURVNET_SET_QUIET(ifp->if_vnet);
445 	if (__predict_false(needs_epoch))
446 		NET_EPOCH_ENTER(et);
447 
448 	if ((ifp->if_flags & IFF_UP) == 0) {
449 		if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
450 		m_freem(m);
451 		goto done;
452 	}
453 
454 	ibh = mtod(m, struct infiniband_header *);
455 
456 	/*
457 	 * Reset layer specific mbuf flags to avoid confusing upper
458 	 * layers:
459 	 */
460 	m->m_flags &= ~M_VLANTAG;
461 	m_clrprotoflags(m);
462 
463 	if (INFINIBAND_IS_MULTICAST(ibh->ib_hwaddr)) {
464 		if (memcmp(ibh->ib_hwaddr, ifp->if_broadcastaddr,
465 		    ifp->if_addrlen) == 0)
466 			m->m_flags |= M_BCAST;
467 		else
468 			m->m_flags |= M_MCAST;
469 		if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
470 	}
471 
472 	/* Let BPF have it before we strip the header. */
473 	infiniband_bpf_mtap(ifp, m);
474 
475 	/* Allow monitor mode to claim this frame, after stats are updated. */
476 	if (ifp->if_flags & IFF_MONITOR) {
477 		m_freem(m);
478 		goto done;
479 	}
480 
481 	/* Direct packet to correct FIB based on interface config. */
482 	M_SETFIB(m, ifp->if_fib);
483 
484 	/* Handle input from a lagg<N> port */
485 	if (ifp->if_type == IFT_INFINIBANDLAG) {
486 		KASSERT(lagg_input_infiniband_p != NULL,
487 		    ("%s: if_lagg not loaded!", __func__));
488 		m = (*lagg_input_infiniband_p)(ifp, m);
489 		if (__predict_false(m == NULL))
490 			goto done;
491 		ifp = m->m_pkthdr.rcvif;
492 	}
493 
494 	/*
495 	 * Dispatch frame to upper layer.
496 	 */
497 	switch (ibh->ib_protocol) {
498 #ifdef INET
499 	case htons(ETHERTYPE_IP):
500 		isr = NETISR_IP;
501 		break;
502 
503 	case htons(ETHERTYPE_ARP):
504 		if (ifp->if_flags & IFF_NOARP) {
505 			/* Discard packet if ARP is disabled on interface */
506 			m_freem(m);
507 			goto done;
508 		}
509 		isr = NETISR_ARP;
510 		break;
511 #endif
512 #ifdef INET6
513 	case htons(ETHERTYPE_IPV6):
514 		isr = NETISR_IPV6;
515 		break;
516 #endif
517 	default:
518 		if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
519 		m_freem(m);
520 		goto done;
521 	}
522 
523 	/* Strip off the Infiniband header. */
524 	m_adj(m, INFINIBAND_HDR_LEN);
525 
526 #ifdef MAC
527 	/*
528 	 * Tag the mbuf with an appropriate MAC label before any other
529 	 * consumers can get to it.
530 	 */
531 	mac_ifnet_create_mbuf(ifp, m);
532 #endif
533 	/* Allow monitor mode to claim this frame, after stats are updated. */
534 	netisr_dispatch(isr, m);
535 done:
536 	if (__predict_false(needs_epoch))
537 		NET_EPOCH_EXIT(et);
538 	CURVNET_RESTORE();
539 }
540 
541 static int
542 infiniband_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
543     struct sockaddr *sa)
544 {
545 	struct sockaddr_dl *sdl;
546 #ifdef INET
547 	struct sockaddr_in *sin;
548 #endif
549 #ifdef INET6
550 	struct sockaddr_in6 *sin6;
551 #endif
552 	uint8_t *e_addr;
553 
554 	switch (sa->sa_family) {
555 	case AF_LINK:
556 		/*
557 		 * No mapping needed. Just check that it's a valid MC address.
558 		 */
559 		sdl = (struct sockaddr_dl *)sa;
560 		e_addr = LLADDR(sdl);
561 		if (!INFINIBAND_IS_MULTICAST(e_addr))
562 			return (EADDRNOTAVAIL);
563 		*llsa = NULL;
564 		return 0;
565 
566 #ifdef INET
567 	case AF_INET:
568 		sin = (struct sockaddr_in *)sa;
569 		if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
570 			return (EADDRNOTAVAIL);
571 		sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
572 		sdl->sdl_alen = INFINIBAND_ADDR_LEN;
573 		e_addr = LLADDR(sdl);
574 		infiniband_ipv4_multicast_map(
575 		    sin->sin_addr.s_addr, ifp->if_broadcastaddr, e_addr);
576 		*llsa = (struct sockaddr *)sdl;
577 		return (0);
578 #endif
579 #ifdef INET6
580 	case AF_INET6:
581 		sin6 = (struct sockaddr_in6 *)sa;
582 		/*
583 		 * An IP6 address of 0 means listen to all of the
584 		 * multicast address used for IP6. This has no meaning
585 		 * in infiniband.
586 		 */
587 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
588 			return (EADDRNOTAVAIL);
589 		if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
590 			return (EADDRNOTAVAIL);
591 		sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
592 		sdl->sdl_alen = INFINIBAND_ADDR_LEN;
593 		e_addr = LLADDR(sdl);
594 		infiniband_ipv6_multicast_map(
595 		    &sin6->sin6_addr, ifp->if_broadcastaddr, e_addr);
596 		*llsa = (struct sockaddr *)sdl;
597 		return (0);
598 #endif
599 	default:
600 		return (EAFNOSUPPORT);
601 	}
602 }
603 
604 void
605 infiniband_ifattach(struct ifnet *ifp, const uint8_t *lla, const uint8_t *llb)
606 {
607 	struct sockaddr_dl *sdl;
608 	struct ifaddr *ifa;
609 	int i;
610 
611 	ifp->if_addrlen = INFINIBAND_ADDR_LEN;
612 	ifp->if_hdrlen = INFINIBAND_HDR_LEN;
613 	ifp->if_mtu = INFINIBAND_MTU;
614 	if_attach(ifp);
615 	ifp->if_output = infiniband_output;
616 	ifp->if_input = infiniband_input;
617 	ifp->if_resolvemulti = infiniband_resolvemulti;
618 	ifp->if_requestencap = infiniband_requestencap;
619 
620 	if (ifp->if_baudrate == 0)
621 		ifp->if_baudrate = IF_Gbps(10); /* default value */
622 	if (llb != NULL)
623 		ifp->if_broadcastaddr = llb;
624 
625 	ifa = ifp->if_addr;
626 	KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
627 	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
628 	sdl->sdl_type = IFT_INFINIBAND;
629 	sdl->sdl_alen = ifp->if_addrlen;
630 
631 	if (lla != NULL) {
632 		memcpy(LLADDR(sdl), lla, ifp->if_addrlen);
633 
634 		if (ifp->if_hw_addr != NULL)
635 			memcpy(ifp->if_hw_addr, lla, ifp->if_addrlen);
636 	} else {
637 		lla = LLADDR(sdl);
638 	}
639 
640 	/* Attach ethernet compatible network device */
641 	bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN);
642 
643 	/* Announce Infiniband MAC address if non-zero. */
644 	for (i = 0; i < ifp->if_addrlen; i++)
645 		if (lla[i] != 0)
646 			break;
647 	if (i != ifp->if_addrlen)
648 		if_printf(ifp, "Infiniband address: %20D\n", lla, ":");
649 
650 	/* Add necessary bits are setup; announce it now. */
651 	EVENTHANDLER_INVOKE(infiniband_ifattach_event, ifp);
652 
653 	if (IS_DEFAULT_VNET(curvnet))
654 		devctl_notify("INFINIBAND", ifp->if_xname, "IFATTACH", NULL);
655 }
656 
657 /*
658  * Perform common duties while detaching an Infiniband interface
659  */
660 void
661 infiniband_ifdetach(struct ifnet *ifp)
662 {
663 	bpfdetach(ifp);
664 	if_detach(ifp);
665 }
666 
667 static int
668 infiniband_modevent(module_t mod, int type, void *data)
669 {
670 	switch (type) {
671 	case MOD_LOAD:
672 	case MOD_UNLOAD:
673 		return (0);
674 	default:
675 		return (EOPNOTSUPP);
676 	}
677 }
678 
679 static moduledata_t infiniband_mod = {
680 	.name = "if_infiniband",
681 	.evhand = &infiniband_modevent,
682 };
683 
684 DECLARE_MODULE(if_infiniband, infiniband_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
685 MODULE_VERSION(if_infiniband, 1);
686