xref: /freebsd/sys/net/if_infiniband.c (revision 19261079) 
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 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/devctl.h>
35 #include <sys/eventhandler.h>
36 #include <sys/kernel.h>
37 #include <sys/mbuf.h>
38 #include <sys/module.h>
39 #include <sys/socket.h>
40 #include <sys/sysctl.h>
41 
42 #include <net/bpf.h>
43 #include <net/ethernet.h>
44 #include <net/infiniband.h>
45 #include <net/if.h>
46 #include <net/if_var.h>
47 #include <net/if_dl.h>
48 #include <net/if_media.h>
49 #include <net/if_lagg.h>
50 #include <net/if_llatbl.h>
51 #include <net/if_types.h>
52 #include <net/netisr.h>
53 #include <net/route.h>
54 #include <netinet/if_ether.h>
55 #include <netinet/in.h>
56 #include <netinet/ip6.h>
57 #include <netinet6/in6_var.h>
58 #include <netinet6/nd6.h>
59 
60 #include <security/mac/mac_framework.h>
61 
62 /* if_lagg(4) support */
63 struct mbuf *(*lagg_input_infiniband_p)(struct ifnet *, struct mbuf *);
64 
65 #ifdef INET
66 static inline void
67 infiniband_ipv4_multicast_map(uint32_t addr,
68     const uint8_t *broadcast, uint8_t *buf)
69 {
70 	uint8_t scope;
71 
72 	addr = ntohl(addr);
73 	scope = broadcast[5] & 0xF;
74 
75 	buf[0] = 0;
76 	buf[1] = 0xff;
77 	buf[2] = 0xff;
78 	buf[3] = 0xff;
79 	buf[4] = 0xff;
80 	buf[5] = 0x10 | scope;
81 	buf[6] = 0x40;
82 	buf[7] = 0x1b;
83 	buf[8] = broadcast[8];
84 	buf[9] = broadcast[9];
85 	buf[10] = 0;
86 	buf[11] = 0;
87 	buf[12] = 0;
88 	buf[13] = 0;
89 	buf[14] = 0;
90 	buf[15] = 0;
91 	buf[16] = (addr >> 24) & 0xff;
92 	buf[17] = (addr >> 16) & 0xff;
93 	buf[18] = (addr >> 8) & 0xff;
94 	buf[19] = addr & 0xff;
95 }
96 #endif
97 
98 #ifdef INET6
99 static inline void
100 infiniband_ipv6_multicast_map(const struct in6_addr *addr,
101     const uint8_t *broadcast, uint8_t *buf)
102 {
103 	uint8_t scope;
104 
105 	scope = broadcast[5] & 0xF;
106 
107 	buf[0] = 0;
108 	buf[1] = 0xff;
109 	buf[2] = 0xff;
110 	buf[3] = 0xff;
111 	buf[4] = 0xff;
112 	buf[5] = 0x10 | scope;
113 	buf[6] = 0x60;
114 	buf[7] = 0x1b;
115 	buf[8] = broadcast[8];
116 	buf[9] = broadcast[9];
117 	memcpy(&buf[10], &addr->s6_addr[6], 10);
118 }
119 #endif
120 
121 /*
122  * This is for clients that have an infiniband_header in the mbuf.
123  */
124 void
125 infiniband_bpf_mtap(struct ifnet *ifp, struct mbuf *mb)
126 {
127 	struct infiniband_header *ibh;
128 	struct ether_header eh;
129 
130 	if (mb->m_len < sizeof(*ibh))
131 		return;
132 
133 	ibh = mtod(mb, struct infiniband_header *);
134 	eh.ether_type = ibh->ib_protocol;
135 	memset(eh.ether_shost, 0, ETHER_ADDR_LEN);
136 	memcpy(eh.ether_dhost, ibh->ib_hwaddr + 4, ETHER_ADDR_LEN);
137 	mb->m_data += sizeof(*ibh);
138 	mb->m_len -= sizeof(*ibh);
139 	mb->m_pkthdr.len -= sizeof(*ibh);
140 	bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
141 	mb->m_data -= sizeof(*ibh);
142 	mb->m_len += sizeof(*ibh);
143 	mb->m_pkthdr.len += sizeof(*ibh);
144 }
145 
146 static void
147 update_mbuf_csumflags(struct mbuf *src, struct mbuf *dst)
148 {
149 	int csum_flags = 0;
150 
151 	if (src->m_pkthdr.csum_flags & CSUM_IP)
152 		csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID);
153 	if (src->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
154 		csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR);
155 	if (src->m_pkthdr.csum_flags & CSUM_SCTP)
156 		csum_flags |= CSUM_SCTP_VALID;
157 	dst->m_pkthdr.csum_flags |= csum_flags;
158 	if (csum_flags & CSUM_DATA_VALID)
159 		dst->m_pkthdr.csum_data = 0xffff;
160 }
161 
162 /*
163  * Handle link-layer encapsulation requests.
164  */
165 static int
166 infiniband_requestencap(struct ifnet *ifp, struct if_encap_req *req)
167 {
168 	struct infiniband_header *ih;
169 	struct arphdr *ah;
170 	uint16_t etype;
171 	const uint8_t *lladdr;
172 
173 	if (req->rtype != IFENCAP_LL)
174 		return (EOPNOTSUPP);
175 
176 	if (req->bufsize < INFINIBAND_HDR_LEN)
177 		return (ENOMEM);
178 
179 	ih = (struct infiniband_header *)req->buf;
180 	lladdr = req->lladdr;
181 	req->lladdr_off = 0;
182 
183 	switch (req->family) {
184 	case AF_INET:
185 		etype = htons(ETHERTYPE_IP);
186 		break;
187 	case AF_INET6:
188 		etype = htons(ETHERTYPE_IPV6);
189 		break;
190 	case AF_ARP:
191 		ah = (struct arphdr *)req->hdata;
192 		ah->ar_hrd = htons(ARPHRD_INFINIBAND);
193 
194 		switch (ntohs(ah->ar_op)) {
195 		case ARPOP_REVREQUEST:
196 		case ARPOP_REVREPLY:
197 			etype = htons(ETHERTYPE_REVARP);
198 			break;
199 		case ARPOP_REQUEST:
200 		case ARPOP_REPLY:
201 		default:
202 			etype = htons(ETHERTYPE_ARP);
203 			break;
204 		}
205 
206 		if (req->flags & IFENCAP_FLAG_BROADCAST)
207 			lladdr = ifp->if_broadcastaddr;
208 		break;
209 	default:
210 		return (EAFNOSUPPORT);
211 	}
212 
213 	ih->ib_protocol = etype;
214 	ih->ib_reserved = 0;
215 	memcpy(ih->ib_hwaddr, lladdr, INFINIBAND_ADDR_LEN);
216 	req->bufsize = sizeof(struct infiniband_header);
217 
218 	return (0);
219 }
220 
221 static int
222 infiniband_resolve_addr(struct ifnet *ifp, struct mbuf *m,
223     const struct sockaddr *dst, struct route *ro, uint8_t *phdr,
224     uint32_t *pflags, struct llentry **plle)
225 {
226 	struct infiniband_header *ih;
227 	uint32_t lleflags = 0;
228 	int error = 0;
229 
230 	if (plle)
231 		*plle = NULL;
232 	ih = (struct infiniband_header *)phdr;
233 
234 	switch (dst->sa_family) {
235 #ifdef INET
236 	case AF_INET:
237 		if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) {
238 			error = arpresolve(ifp, 0, m, dst, phdr, &lleflags, plle);
239 		} else {
240 			if (m->m_flags & M_BCAST) {
241 				memcpy(ih->ib_hwaddr, ifp->if_broadcastaddr,
242 				    INFINIBAND_ADDR_LEN);
243 			} else {
244 				infiniband_ipv4_multicast_map(
245 				    ((const struct sockaddr_in *)dst)->sin_addr.s_addr,
246 				    ifp->if_broadcastaddr, ih->ib_hwaddr);
247 			}
248 			ih->ib_protocol = htons(ETHERTYPE_IP);
249 			ih->ib_reserved = 0;
250 		}
251 		break;
252 #endif
253 #ifdef INET6
254 	case AF_INET6:
255 		if ((m->m_flags & M_MCAST) == 0) {
256 			int af = RO_GET_FAMILY(ro, dst);
257 			error = nd6_resolve(ifp, LLE_SF(af, 0), m, dst, phdr,
258 			    &lleflags, plle);
259 		} else {
260 			infiniband_ipv6_multicast_map(
261 			    &((const struct sockaddr_in6 *)dst)->sin6_addr,
262 			    ifp->if_broadcastaddr, ih->ib_hwaddr);
263 			ih->ib_protocol = htons(ETHERTYPE_IPV6);
264 			ih->ib_reserved = 0;
265 		}
266 		break;
267 #endif
268 	default:
269 		if_printf(ifp, "can't handle af%d\n", dst->sa_family);
270 		if (m != NULL)
271 			m_freem(m);
272 		return (EAFNOSUPPORT);
273 	}
274 
275 	if (error == EHOSTDOWN) {
276 		if (ro != NULL && (ro->ro_flags & RT_HAS_GW) != 0)
277 			error = EHOSTUNREACH;
278 	}
279 
280 	if (error != 0)
281 		return (error);
282 
283 	*pflags = RT_MAY_LOOP;
284 	if (lleflags & LLE_IFADDR)
285 		*pflags |= RT_L2_ME;
286 
287 	return (0);
288 }
289 
290 /*
291  * Infiniband output routine.
292  */
293 static int
294 infiniband_output(struct ifnet *ifp, struct mbuf *m,
295     const struct sockaddr *dst, struct route *ro)
296 {
297 	uint8_t linkhdr[INFINIBAND_HDR_LEN];
298 	uint8_t *phdr;
299 	struct llentry *lle = NULL;
300 	struct infiniband_header *ih;
301 	int error = 0;
302 	int hlen;	/* link layer header length */
303 	uint32_t pflags;
304 	bool addref;
305 
306 	NET_EPOCH_ASSERT();
307 
308 	addref = false;
309 	phdr = NULL;
310 	pflags = 0;
311 	if (ro != NULL) {
312 		/* XXX BPF uses ro_prepend */
313 		if (ro->ro_prepend != NULL) {
314 			phdr = ro->ro_prepend;
315 			hlen = ro->ro_plen;
316 		} else if (!(m->m_flags & (M_BCAST | M_MCAST))) {
317 			if ((ro->ro_flags & RT_LLE_CACHE) != 0) {
318 				lle = ro->ro_lle;
319 				if (lle != NULL &&
320 				    (lle->la_flags & LLE_VALID) == 0) {
321 					LLE_FREE(lle);
322 					lle = NULL;	/* redundant */
323 					ro->ro_lle = NULL;
324 				}
325 				if (lle == NULL) {
326 					/* if we lookup, keep cache */
327 					addref = 1;
328 				} else
329 					/*
330 					 * Notify LLE code that
331 					 * the entry was used
332 					 * by datapath.
333 					 */
334 					llentry_provide_feedback(lle);
335 			}
336 			if (lle != NULL) {
337 				phdr = lle->r_linkdata;
338 				hlen = lle->r_hdrlen;
339 				pflags = lle->r_flags;
340 			}
341 		}
342 	}
343 
344 #ifdef MAC
345 	error = mac_ifnet_check_transmit(ifp, m);
346 	if (error)
347 		goto bad;
348 #endif
349 
350 	M_PROFILE(m);
351 	if (ifp->if_flags & IFF_MONITOR) {
352 		error = ENETDOWN;
353 		goto bad;
354 	}
355 	if (!((ifp->if_flags & IFF_UP) &&
356 	    (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
357 		error = ENETDOWN;
358 		goto bad;
359 	}
360 
361 	if (phdr == NULL) {
362 		/* No prepend data supplied. Try to calculate ourselves. */
363 		phdr = linkhdr;
364 		hlen = INFINIBAND_HDR_LEN;
365 		error = infiniband_resolve_addr(ifp, m, dst, ro, phdr, &pflags,
366 		    addref ? &lle : NULL);
367 		if (addref && lle != NULL)
368 			ro->ro_lle = lle;
369 		if (error != 0)
370 			return (error == EWOULDBLOCK ? 0 : error);
371 	}
372 
373 	if ((pflags & RT_L2_ME) != 0) {
374 		update_mbuf_csumflags(m, m);
375 		return (if_simloop(ifp, m, RO_GET_FAMILY(ro, dst), 0));
376 	}
377 
378 	/*
379 	 * Add local infiniband header. If no space in first mbuf,
380 	 * allocate another.
381 	 */
382 	M_PREPEND(m, INFINIBAND_HDR_LEN, M_NOWAIT);
383 	if (m == NULL) {
384 		error = ENOBUFS;
385 		goto bad;
386 	}
387 	if ((pflags & RT_HAS_HEADER) == 0) {
388 		ih = mtod(m, struct infiniband_header *);
389 		memcpy(ih, phdr, hlen);
390 	}
391 
392 	/*
393 	 * Queue message on interface, update output statistics if
394 	 * successful, and start output if interface not yet active.
395 	 */
396 	return (ifp->if_transmit(ifp, m));
397 bad:
398 	if (m != NULL)
399 		m_freem(m);
400 	return (error);
401 }
402 
403 /*
404  * Process a received Infiniband packet.
405  */
406 static void
407 infiniband_input(struct ifnet *ifp, struct mbuf *m)
408 {
409 	struct infiniband_header *ibh;
410 	struct epoch_tracker et;
411 	int isr;
412 
413 	CURVNET_SET_QUIET(ifp->if_vnet);
414 
415 	if ((ifp->if_flags & IFF_UP) == 0) {
416 		if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
417 		m_freem(m);
418 		goto done;
419 	}
420 
421 	ibh = mtod(m, struct infiniband_header *);
422 
423 	/*
424 	 * Reset layer specific mbuf flags to avoid confusing upper
425 	 * layers:
426 	 */
427 	m->m_flags &= ~M_VLANTAG;
428 	m_clrprotoflags(m);
429 
430 	if (INFINIBAND_IS_MULTICAST(ibh->ib_hwaddr)) {
431 		if (memcmp(ibh->ib_hwaddr, ifp->if_broadcastaddr,
432 		    ifp->if_addrlen) == 0)
433 			m->m_flags |= M_BCAST;
434 		else
435 			m->m_flags |= M_MCAST;
436 		if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
437 	}
438 
439 	/* Let BPF have it before we strip the header. */
440 	INFINIBAND_BPF_MTAP(ifp, m);
441 
442 	/* Allow monitor mode to claim this frame, after stats are updated. */
443 	if (ifp->if_flags & IFF_MONITOR) {
444 		m_freem(m);
445 		goto done;
446 	}
447 
448 	/* Direct packet to correct FIB based on interface config. */
449 	M_SETFIB(m, ifp->if_fib);
450 
451 	/* Handle input from a lagg<N> port */
452 	if (ifp->if_type == IFT_INFINIBANDLAG) {
453 		KASSERT(lagg_input_infiniband_p != NULL,
454 		    ("%s: if_lagg not loaded!", __func__));
455 		m = (*lagg_input_infiniband_p)(ifp, m);
456 		if (__predict_false(m == NULL))
457 			goto done;
458 		ifp = m->m_pkthdr.rcvif;
459 	}
460 
461 	/*
462 	 * Dispatch frame to upper layer.
463 	 */
464 	switch (ibh->ib_protocol) {
465 #ifdef INET
466 	case htons(ETHERTYPE_IP):
467 		isr = NETISR_IP;
468 		break;
469 
470 	case htons(ETHERTYPE_ARP):
471 		if (ifp->if_flags & IFF_NOARP) {
472 			/* Discard packet if ARP is disabled on interface */
473 			m_freem(m);
474 			goto done;
475 		}
476 		isr = NETISR_ARP;
477 		break;
478 #endif
479 #ifdef INET6
480 	case htons(ETHERTYPE_IPV6):
481 		isr = NETISR_IPV6;
482 		break;
483 #endif
484 	default:
485 		if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
486 		m_freem(m);
487 		goto done;
488 	}
489 
490 	/* Strip off the Infiniband header. */
491 	m_adj(m, INFINIBAND_HDR_LEN);
492 
493 #ifdef MAC
494 	/*
495 	 * Tag the mbuf with an appropriate MAC label before any other
496 	 * consumers can get to it.
497 	 */
498 	mac_ifnet_create_mbuf(ifp, m);
499 #endif
500 	/* Allow monitor mode to claim this frame, after stats are updated. */
501 	NET_EPOCH_ENTER(et);
502 	netisr_dispatch(isr, m);
503 	NET_EPOCH_EXIT(et);
504 done:
505 	CURVNET_RESTORE();
506 }
507 
508 static int
509 infiniband_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
510     struct sockaddr *sa)
511 {
512 	struct sockaddr_dl *sdl;
513 #ifdef INET
514 	struct sockaddr_in *sin;
515 #endif
516 #ifdef INET6
517 	struct sockaddr_in6 *sin6;
518 #endif
519 	uint8_t *e_addr;
520 
521 	switch (sa->sa_family) {
522 	case AF_LINK:
523 		/*
524 		 * No mapping needed. Just check that it's a valid MC address.
525 		 */
526 		sdl = (struct sockaddr_dl *)sa;
527 		e_addr = LLADDR(sdl);
528 		if (!INFINIBAND_IS_MULTICAST(e_addr))
529 			return (EADDRNOTAVAIL);
530 		*llsa = NULL;
531 		return 0;
532 
533 #ifdef INET
534 	case AF_INET:
535 		sin = (struct sockaddr_in *)sa;
536 		if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
537 			return (EADDRNOTAVAIL);
538 		sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
539 		sdl->sdl_alen = INFINIBAND_ADDR_LEN;
540 		e_addr = LLADDR(sdl);
541 		infiniband_ipv4_multicast_map(
542 		    sin->sin_addr.s_addr, ifp->if_broadcastaddr, e_addr);
543 		*llsa = (struct sockaddr *)sdl;
544 		return (0);
545 #endif
546 #ifdef INET6
547 	case AF_INET6:
548 		sin6 = (struct sockaddr_in6 *)sa;
549 		/*
550 		 * An IP6 address of 0 means listen to all of the
551 		 * multicast address used for IP6. This has no meaning
552 		 * in infiniband.
553 		 */
554 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
555 			return (EADDRNOTAVAIL);
556 		if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
557 			return (EADDRNOTAVAIL);
558 		sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
559 		sdl->sdl_alen = INFINIBAND_ADDR_LEN;
560 		e_addr = LLADDR(sdl);
561 		infiniband_ipv6_multicast_map(
562 		    &sin6->sin6_addr, ifp->if_broadcastaddr, e_addr);
563 		*llsa = (struct sockaddr *)sdl;
564 		return (0);
565 #endif
566 	default:
567 		return (EAFNOSUPPORT);
568 	}
569 }
570 
571 void
572 infiniband_ifattach(struct ifnet *ifp, const uint8_t *lla, const uint8_t *llb)
573 {
574 	struct sockaddr_dl *sdl;
575 	struct ifaddr *ifa;
576 	int i;
577 
578 	ifp->if_addrlen = INFINIBAND_ADDR_LEN;
579 	ifp->if_hdrlen = INFINIBAND_HDR_LEN;
580 	ifp->if_mtu = INFINIBAND_MTU;
581 	if_attach(ifp);
582 	ifp->if_output = infiniband_output;
583 	ifp->if_input = infiniband_input;
584 	ifp->if_resolvemulti = infiniband_resolvemulti;
585 	ifp->if_requestencap = infiniband_requestencap;
586 
587 	if (ifp->if_baudrate == 0)
588 		ifp->if_baudrate = IF_Gbps(10); /* default value */
589 	if (llb != NULL)
590 		ifp->if_broadcastaddr = llb;
591 
592 	ifa = ifp->if_addr;
593 	KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
594 	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
595 	sdl->sdl_type = IFT_INFINIBAND;
596 	sdl->sdl_alen = ifp->if_addrlen;
597 
598 	if (lla != NULL) {
599 		memcpy(LLADDR(sdl), lla, ifp->if_addrlen);
600 
601 		if (ifp->if_hw_addr != NULL)
602 			memcpy(ifp->if_hw_addr, lla, ifp->if_addrlen);
603 	} else {
604 		lla = LLADDR(sdl);
605 	}
606 
607 	/* Attach ethernet compatible network device */
608 	bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN);
609 
610 	/* Announce Infiniband MAC address if non-zero. */
611 	for (i = 0; i < ifp->if_addrlen; i++)
612 		if (lla[i] != 0)
613 			break;
614 	if (i != ifp->if_addrlen)
615 		if_printf(ifp, "Infiniband address: %20D\n", lla, ":");
616 
617 	/* Add necessary bits are setup; announce it now. */
618 	EVENTHANDLER_INVOKE(infiniband_ifattach_event, ifp);
619 
620 	if (IS_DEFAULT_VNET(curvnet))
621 		devctl_notify("INFINIBAND", ifp->if_xname, "IFATTACH", NULL);
622 }
623 
624 /*
625  * Perform common duties while detaching an Infiniband interface
626  */
627 void
628 infiniband_ifdetach(struct ifnet *ifp)
629 {
630 	bpfdetach(ifp);
631 	if_detach(ifp);
632 }
633 
634 static int
635 infiniband_modevent(module_t mod, int type, void *data)
636 {
637 	switch (type) {
638 	case MOD_LOAD:
639 	case MOD_UNLOAD:
640 		return (0);
641 	default:
642 		return (EOPNOTSUPP);
643 	}
644 }
645 
646 static moduledata_t infiniband_mod = {
647 	.name = "if_infiniband",
648 	.evhand = &infiniband_modevent,
649 };
650 
651 DECLARE_MODULE(if_infiniband, infiniband_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
652 MODULE_VERSION(if_infiniband, 1);
653