xref: /titanic_44/usr/src/uts/common/io/strplumb.c (revision f80ce222af313ec87dc070b2219b29c81c5e5d8c)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #include	<sys/param.h>
27 #include	<sys/types.h>
28 #include	<sys/user.h>
29 #include	<sys/vfs.h>
30 #include	<sys/vnode.h>
31 #include	<sys/file.h>
32 #include	<sys/stream.h>
33 #include	<sys/stropts.h>
34 #include	<sys/strsubr.h>
35 #include	<sys/dlpi.h>
36 #include	<sys/vnode.h>
37 #include	<sys/socket.h>
38 #include	<sys/sockio.h>
39 #include	<net/if.h>
40 
41 #include	<sys/cred.h>
42 #include	<sys/sysmacros.h>
43 
44 #include	<sys/sad.h>
45 #include	<sys/kstr.h>
46 #include	<sys/bootconf.h>
47 #include	<sys/bootprops.h>
48 
49 #include	<sys/errno.h>
50 #include	<sys/modctl.h>
51 #include	<sys/sunddi.h>
52 #include	<sys/sunldi.h>
53 #include	<sys/esunddi.h>
54 #include	<sys/promif.h>
55 
56 #include	<sys/strlog.h>
57 #include	<sys/log.h>
58 #include	<sys/ethernet.h>
59 #include	<sys/ddi_implfuncs.h>
60 
61 #include	<sys/dld.h>
62 #include	<sys/mac_client.h>
63 
64 /*
65  * Debug Macros
66  */
67 int	strplumbdebug = 0;
68 
69 extern ib_boot_prop_t *iscsiboot_prop;
70 
71 #define	DBG0(_f) \
72 	if (strplumbdebug != 0) \
73 		printf("strplumb: " _f)
74 
75 #define	DBG1(_f, _a) \
76 	if (strplumbdebug != 0) \
77 		printf("strplumb: " _f, (_a))
78 
79 #define	DBG2(_f, _a, _b) \
80 	if (strplumbdebug != 0) \
81 		printf("strplumb: " _f, (_a), (_b))
82 
83 #define	DBG3(_f, _a, _b, _c) \
84 	if (strplumbdebug != 0) \
85 		printf("strplumb: " _f, (_a), (_b), (_c))
86 
87 /*
88  * Module linkage information for the kernel.
89  */
90 #define	STRPLUMB_IDENT	"STREAMS Plumbing Module"
91 
92 static struct modlmisc modlmisc = {
93 	&mod_miscops,
94 	STRPLUMB_IDENT
95 };
96 
97 static struct modlinkage modlinkage = {
98 	MODREV_1,
99 	&modlmisc,
100 	NULL
101 };
102 
103 int
104 _init(void)
105 {
106 	return (mod_install(&modlinkage));
107 }
108 
109 int
110 _fini(void)
111 {
112 	return (mod_remove(&modlinkage));
113 }
114 
115 int
116 _info(struct modinfo *modinfop)
117 {
118 	return (mod_info(&modlinkage, modinfop));
119 }
120 
121 #define	ARP		"arp"
122 #define	TCP		"tcp"
123 #define	TCP6		"tcp6"
124 #define	UDP		"udp"
125 #define	UDP6		"udp6"
126 #define	ICMP		"icmp"
127 #define	ICMP6		"icmp6"
128 #define	IP		"ip"
129 #define	IP6		"ip6"
130 #define	TIMOD		"timod"
131 
132 #define	UDPDEV		"/devices/pseudo/udp@0:udp"
133 #define	TCP6DEV		"/devices/pseudo/tcp6@0:tcp6"
134 #define	UDP6DEV		"/devices/pseudo/udp6@0:udp6"
135 #define	IP6DEV		"/devices/pseudo/ip6@0:ip6"
136 
137 typedef struct strplumb_modspec {
138 	char	*sm_type;
139 	char	*sm_name;
140 } strplumb_modspec_t;
141 
142 static strplumb_modspec_t	strplumb_modlist[] = {
143 	{ "drv", DLD_DRIVER_NAME },
144 	{ "drv", IP },
145 	{ "drv", IP6 },
146 	{ "drv", TCP },
147 	{ "drv", TCP6 },
148 	{ "drv", UDP },
149 	{ "drv", UDP6 },
150 	{ "drv", ICMP },
151 	{ "drv", ICMP6 },
152 	{ "drv", ARP },
153 	{ "strmod", TIMOD }
154 };
155 
156 /*
157  * Called from swapgeneric.c:loadrootmodules() in the network boot case.
158  */
159 int
160 strplumb_load(void)
161 {
162 	uint_t			i;
163 	strplumb_modspec_t	*p;
164 
165 	DBG0("loading modules\n");
166 
167 	for (i = 0, p = strplumb_modlist;
168 	    i < sizeof (strplumb_modlist) / sizeof (strplumb_modlist[0]);
169 	    i++, p++) {
170 		if (modloadonly(p->sm_type, p->sm_name) < 0) {
171 			printf("strplumb: failed to load %s/%s\n",
172 			    p->sm_type, p->sm_name);
173 			return (EFAULT);
174 		}
175 	}
176 
177 	return (0);
178 }
179 
180 static int
181 strplumb_init(void)
182 {
183 	uint_t			i;
184 	strplumb_modspec_t	*p;
185 	int			err;
186 
187 	DBG0("initializing modules\n");
188 
189 	for (i = 0, p = strplumb_modlist;
190 	    i < sizeof (strplumb_modlist) / sizeof (strplumb_modlist[0]);
191 	    i++, p++) {
192 		if (strcmp(p->sm_type, "drv") == 0)
193 			err = (i_ddi_attach_pseudo_node(p->sm_name) != NULL) ?
194 			    0 : EFAULT;
195 		else
196 			err = (modload(p->sm_type, p->sm_name) < 0) ?
197 			    EFAULT : 0;
198 
199 		if (err != 0)  {
200 			printf("strplumb: failed to initialize %s/%s\n",
201 			    p->sm_type, p->sm_name);
202 			return (err);
203 		}
204 	}
205 
206 	return (0);
207 }
208 
209 /*
210  * Can be set in /etc/system in the case of local booting. See comment below.
211  */
212 char	*ndev_name = 0;
213 int	ndev_unit = 0;
214 
215 /*
216  * If we booted diskless then strplumb() will have been called from
217  * swapgeneric.c:rootconf(). All we can do in that case is plumb the
218  * network device that we booted from.
219  *
220  * If we booted from a local disk, we will have been called from main(),
221  * and normally we defer the plumbing of interfaces until network/physical.
222  * This can be overridden by setting "ndev_name" in /etc/system.
223  */
224 static int
225 resolve_boot_path(void)
226 {
227 	char			*devpath;
228 	dev_info_t		*dip;
229 	const char		*driver;
230 	int			instance;
231 #ifdef	_OBP
232 	char			stripped_path[OBP_MAXPATHLEN];
233 #endif
234 
235 	if (strncmp(rootfs.bo_fstype, "nfs", 3) == 0)
236 		devpath = rootfs.bo_name;
237 	else
238 		devpath = strplumb_get_netdev_path();
239 
240 	if (devpath != NULL) {
241 		DBG1("resolving boot-path: %s\n", devpath);
242 #ifdef _OBP
243 		/*
244 		 * OBP passes options e.g, "net:dhcp"
245 		 * remove them here
246 		 */
247 		prom_strip_options(devpath, stripped_path);
248 		devpath = stripped_path;
249 #endif
250 		/*
251 		 * Hold the devi since this is the root device.
252 		 */
253 		if ((dip = e_ddi_hold_devi_by_path(devpath, 0)) == NULL) {
254 			printf("strplumb: unable to hold root device: %s\n",
255 			    devpath);
256 			return (ENXIO);
257 		}
258 
259 		driver = ddi_driver_name(dip);
260 		instance = ddi_get_instance(dip);
261 	} else {
262 		if (ndev_name == NULL)
263 			return (ENODEV);
264 
265 		DBG2("using ndev_name (%s) ndev_unit (%d)\n", ndev_name,
266 		    ndev_unit);
267 
268 		if (i_ddi_attach_hw_nodes(ndev_name) != DDI_SUCCESS) {
269 			printf("strplumb: cannot load ndev_name '%s'\n",
270 			    ndev_name);
271 			return (ENXIO);
272 		}
273 
274 		driver = ndev_name;
275 		instance = ndev_unit;
276 	}
277 
278 	(void) snprintf(rootfs.bo_devname, BO_MAXOBJNAME,
279 	    "/devices/pseudo/clone@0:%s", driver);
280 	(void) snprintf(rootfs.bo_ifname, BO_MAXOBJNAME, "%s%d",
281 	    driver, instance);
282 	rootfs.bo_ppa = instance;
283 	return (0);
284 }
285 
286 static int
287 getifflags(ldi_handle_t lh, struct lifreq *lifrp)
288 {
289 	struct strioctl	iocb;
290 	int		rval;
291 
292 	iocb.ic_cmd = SIOCGLIFFLAGS;
293 	iocb.ic_timout = 15;
294 	iocb.ic_len = sizeof (struct lifreq);
295 	iocb.ic_dp = (char *)lifrp;
296 
297 	return (ldi_ioctl(lh, I_STR, (intptr_t)&iocb, FKIOCTL, CRED(), &rval));
298 
299 }
300 
301 static int
302 setifname(ldi_handle_t lh, struct lifreq *lifrp)
303 {
304 	struct strioctl	iocb;
305 	int		rval;
306 
307 	iocb.ic_cmd = SIOCSLIFNAME;
308 	iocb.ic_timout = 15;
309 	iocb.ic_len = sizeof (struct lifreq);
310 	iocb.ic_dp = (char *)lifrp;
311 
312 	return (ldi_ioctl(lh, I_STR, (intptr_t)&iocb, FKIOCTL, CRED(), &rval));
313 }
314 
315 static int
316 strplumb_dev(ldi_ident_t li)
317 {
318 	ldi_handle_t	lh = NULL;
319 	ldi_handle_t	mux_lh = NULL;
320 	int		err;
321 	struct lifreq	lifr;
322 	struct ifreq	ifr;
323 	int		rval;
324 	int		af = 0;
325 	char		*name = NULL;
326 
327 	bzero(&lifr, sizeof (struct lifreq));
328 	bzero(&ifr, sizeof (ifr));
329 
330 	if (iscsiboot_prop != NULL) {
331 		af = iscsiboot_prop->boot_nic.sin_family;
332 	}
333 
334 	/*
335 	 * Now set up the links. Ultimately, we should have two streams
336 	 * permanently linked under UDP.  One stream consists of the
337 	 * ARP-[ifname] combination, while the other consists of IP-[ifname].
338 	 *
339 	 * We pin underneath UDP here to match what is done in ifconfig(1m);
340 	 * otherwise, ifconfig will be unable to unplumb the stream (the major
341 	 * number and mux id must both match for a successful I_PUNLINK).
342 	 *
343 	 * There are subtleties in the plumbing which make it essential to
344 	 * follow the logic used in ifconfig(1m) very closely.
345 	 */
346 
347 	/*
348 	 * Plumb UDP-IP-<dev>
349 	 */
350 
351 	if ((err = ldi_open_by_name(rootfs.bo_devname, FREAD|FWRITE, CRED(),
352 	    &lh, li)) != 0) {
353 		printf("strplumb: open %s failed: %d\n", rootfs.bo_devname,
354 		    err);
355 		goto done;
356 	}
357 
358 
359 	if ((err = ldi_ioctl(lh, I_PUSH, (intptr_t)IP, FKIOCTL, CRED(),
360 	    &rval)) != 0) {
361 		printf("strplumb: push IP failed: %d\n", err);
362 		goto done;
363 	}
364 
365 	if ((err = getifflags(lh, &lifr)) != 0)
366 		goto done;
367 
368 	if (af == 0 || af == AF_INET) {
369 		lifr.lifr_flags |= IFF_IPV4;
370 		lifr.lifr_flags &= ~IFF_IPV6;
371 		name = UDPDEV;
372 	} else {
373 		/*
374 		 * iscsi boot is used with ipv6 enabled
375 		 */
376 		lifr.lifr_flags |= IFF_IPV6;
377 		lifr.lifr_flags &= ~IFF_IPV4;
378 		name = UDP6DEV;
379 	}
380 	(void) strlcpy(lifr.lifr_name, rootfs.bo_ifname,
381 	    sizeof (lifr.lifr_name));
382 	lifr.lifr_ppa = rootfs.bo_ppa;
383 
384 	if ((err = setifname(lh, &lifr)) != 0)
385 		goto done;
386 
387 	/* get the flags and check if ARP is needed */
388 	if ((err = getifflags(lh, &lifr)) != 0) {
389 		printf("strplumb: getifflags %s IP failed, error %d\n",
390 		    lifr.lifr_name, err);
391 		goto done;
392 	}
393 	if ((err = ldi_open_by_name(name, FREAD|FWRITE, CRED(), &mux_lh,
394 	    li)) != 0) {
395 		printf("strplumb: open of %s failed: %d\n", name, err);
396 		goto done;
397 	}
398 	if ((err = ldi_ioctl(mux_lh, I_PLINK, (intptr_t)lh,
399 	    FREAD|FWRITE|FNOCTTY|FKIOCTL, CRED(),
400 	    &(ifr.ifr_ip_muxid))) != 0) {
401 		printf("strplumb: plink UDP-ARP-IP-%s failed: %d\n",
402 		    rootfs.bo_ifname, err);
403 		goto done;
404 	}
405 
406 	/* if ARP is not needed, we are done */
407 	if (lifr.lifr_flags & (IFF_NOARP | IFF_IPV6))
408 		goto done;
409 
410 	DBG2("UDP-ARP-IP-%s muxid: %d\n", rootfs.bo_ifname, ifr.ifr_ip_muxid);
411 
412 	(void) ldi_close(lh, FREAD|FWRITE, CRED());
413 	lh = NULL;
414 
415 	/*
416 	 * Plumb UDP-ARP-<dev>
417 	 */
418 
419 	if ((err = ldi_open_by_name(rootfs.bo_devname, FREAD|FWRITE, CRED(),
420 	    &lh, li)) != 0) {
421 		printf("strplumb: open %s failed: %d\n", rootfs.bo_devname,
422 		    err);
423 		goto done;
424 	}
425 
426 	if ((err = ldi_ioctl(lh, I_PUSH, (intptr_t)ARP, FKIOCTL, CRED(),
427 	    &rval)) != 0) {
428 		printf("strplumb: push ARP failed: %d\n", err);
429 		goto done;
430 	}
431 
432 	if ((err = setifname(lh, &lifr)) != 0)
433 		goto done;
434 
435 	if ((err = ldi_ioctl(mux_lh, I_PLINK, (intptr_t)lh,
436 	    FREAD|FWRITE|FNOCTTY|FKIOCTL, CRED(),
437 	    &(ifr.ifr_arp_muxid))) != 0) {
438 		printf("strplumb: plink UDP-ARP-%s failed: %d\n",
439 		    rootfs.bo_ifname, err);
440 		goto done;
441 	}
442 
443 	DBG2("UDP-ARP-%s muxid: %d\n", rootfs.bo_ifname, ifr.ifr_arp_muxid);
444 
445 	/*
446 	 * Cache the mux ids.
447 	 */
448 	(void) strlcpy(ifr.ifr_name, rootfs.bo_ifname, sizeof (ifr.ifr_name));
449 
450 	if ((err = ldi_ioctl(mux_lh, SIOCSIFMUXID, (intptr_t)&ifr, FKIOCTL,
451 	    CRED(), &rval)) != 0) {
452 		printf("strplumb: SIOCSIFMUXID failed: %d\n", err);
453 		goto done;
454 	}
455 
456 done:
457 	if (lh != NULL)
458 		(void) ldi_close(lh, FREAD|FWRITE, CRED());
459 
460 	if (mux_lh != NULL)
461 		(void) ldi_close(mux_lh, FREAD|FWRITE, CRED());
462 
463 	return (err);
464 }
465 
466 /*
467  * Do streams plumbing for internet protocols.
468  */
469 int
470 strplumb(void)
471 {
472 	ldi_ident_t	li;
473 	int		err;
474 
475 	if ((err = strplumb_init()) != 0)
476 		return (err);
477 
478 	if ((err = ldi_ident_from_mod(&modlinkage, &li)) != 0)
479 		return (err);
480 
481 	if ((err = resolve_boot_path()) != 0)
482 		goto done;
483 
484 	DBG1("rootfs.bo_devname: %s\n", rootfs.bo_devname);
485 	DBG1("rootfs.bo_ifname: %s\n", rootfs.bo_ifname);
486 	DBG1("rootfs.bo_ppa: %d\n", rootfs.bo_ppa);
487 
488 	if ((err = strplumb_dev(li)) != 0)
489 		goto done;
490 
491 done:
492 	ldi_ident_release(li);
493 
494 	return (err);
495 }
496 
497 /* multiboot:  diskless boot interface discovery */
498 
499 #ifndef	_OBP
500 
501 static uchar_t boot_macaddr[16];
502 static int boot_maclen;
503 static uchar_t *getmacaddr(dev_info_t *dip, size_t *maclenp);
504 static int matchmac(dev_info_t *dip, void *arg);
505 
506 #endif  /* !_OBP */
507 
508 char *
509 strplumb_get_netdev_path(void)
510 {
511 #ifdef	_OBP
512 	char		fstype[OBP_MAXPROPNAME];
513 	static char	iscsi_network_path[BO_MAXOBJNAME]	= {0};
514 	int		proplen;
515 	char		*p	= NULL;
516 
517 	if (bop_getprop("fstype", fstype) == -1)
518 		return (NULL);
519 
520 	if (strncmp(fstype, "nfs", 3) == 0)
521 		return (prom_bootpath());
522 	else if (iscsiboot_prop != NULL) {
523 		proplen =  BOP_GETPROPLEN(bootops,
524 		    BP_ISCSI_NETWORK_BOOTPATH);
525 		if (proplen > 0) {
526 			if (BOP_GETPROP(bootops,
527 			    BP_ISCSI_NETWORK_BOOTPATH,
528 			    iscsi_network_path) > 0) {
529 				p = strchr(iscsi_network_path, ':');
530 				if (p != NULL) {
531 					*p = '\0';
532 				}
533 				return (iscsi_network_path);
534 			}
535 		}
536 	}
537 	return (NULL);
538 #else
539 
540 	char *macstr, *devpath = NULL;
541 	uchar_t *bootp;
542 	uint_t bootp_len;
543 
544 	if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
545 	    DDI_PROP_DONTPASS, BP_BOOT_MAC, &macstr) == DDI_SUCCESS) {
546 		/*
547 		 * hard coded ether mac len for booting floppy on
548 		 * machines with old cards
549 		 */
550 		boot_maclen = ether_aton(macstr, boot_macaddr);
551 		if (boot_maclen != 6) {
552 			cmn_err(CE_WARN,
553 			    "malformed boot_mac property, %d bytes",
554 			    boot_maclen);
555 		}
556 		ddi_prop_free(macstr);
557 	} else if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, ddi_root_node(),
558 	    DDI_PROP_DONTPASS, BP_BOOTP_RESPONSE, &bootp, &bootp_len)
559 	    == DDI_SUCCESS) {
560 
561 		/*
562 		 * These offsets are defined by dhcp standard
563 		 * Should use structure offsets
564 		 */
565 		boot_maclen = *(bootp + 2);
566 		ASSERT(boot_maclen <= 16);
567 		bcopy(bootp + 28, boot_macaddr, boot_maclen);
568 
569 		dhcack = kmem_alloc(bootp_len, KM_SLEEP);
570 		bcopy(bootp, dhcack, bootp_len);
571 		dhcacklen = bootp_len;
572 
573 		ddi_prop_free(bootp);
574 	} else  if (iscsiboot_prop != NULL) {
575 		bcopy(iscsiboot_prop->boot_nic.nic_mac,
576 		    boot_macaddr, IB_BOOT_MACLEN);
577 		boot_maclen = IB_BOOT_MACLEN;
578 	} else {
579 		return (NULL);
580 	}
581 
582 	ddi_walk_devs(ddi_root_node(), matchmac, (void *)&devpath);
583 	return (devpath);
584 
585 #endif  /* _OBP */
586 }
587 
588 #ifndef _OBP
589 
590 /*
591  * Get boot path from the boot_mac address
592  */
593 /*ARGSUSED*/
594 static int
595 matchmac(dev_info_t *dip, void *arg)
596 {
597 	char **devpathp = (char **)arg;
598 	char *model_str;
599 	uchar_t *macaddr;
600 	size_t maclen;
601 
602 	/* XXX Should use "device-type" per IEEE 1275 */
603 	if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, 0,
604 	    "model", &model_str) != DDI_SUCCESS)
605 		return (DDI_WALK_CONTINUE);
606 
607 	if (strcmp(model_str, "Ethernet controller") != 0) {
608 		ddi_prop_free(model_str);
609 		return (DDI_WALK_CONTINUE);
610 	}
611 	ddi_prop_free(model_str);
612 
613 	/* We have a network device now */
614 	if (i_ddi_attach_node_hierarchy(dip) != DDI_SUCCESS) {
615 		return (DDI_WALK_CONTINUE);
616 	}
617 
618 	ASSERT(boot_maclen != 0);
619 	macaddr = getmacaddr(dip, &maclen);
620 	if (macaddr == NULL)
621 		return (DDI_WALK_CONTINUE);
622 
623 	if (maclen != boot_maclen ||
624 	    bcmp(macaddr, boot_macaddr, maclen) != 0) {
625 		kmem_free(macaddr, maclen);
626 		return (DDI_WALK_CONTINUE);
627 	}
628 
629 	/* found hardware with the mac address */
630 	(void) localetheraddr((struct ether_addr *)macaddr, NULL);
631 	kmem_free(macaddr, maclen);
632 
633 	*devpathp = kmem_alloc(MAXPATHLEN, KM_SLEEP);
634 	(void) ddi_pathname(dip, *devpathp);
635 
636 	/* fill in dhcifname */
637 	if (dhcack) {
638 		(void) snprintf(dhcifname, IFNAMSIZ, "%s%d",
639 		    ddi_driver_name(dip), i_ddi_devi_get_ppa(dip));
640 	}
641 	return (DDI_WALK_TERMINATE);
642 }
643 
644 static uchar_t *
645 getmacaddr(dev_info_t *dip, size_t *maclenp)
646 {
647 	int rc, ppa;
648 	ldi_ident_t li;
649 	ldi_handle_t lh;
650 	const char *drv_name = ddi_driver_name(dip);
651 	char *clonepath;
652 	uchar_t *macaddr = NULL;
653 
654 	if (rc = ldi_ident_from_mod(&modlinkage, &li)) {
655 		cmn_err(CE_WARN,
656 		    "getmacaddr: ldi_ident_from_mod failed: %d\n", rc);
657 		return (NULL);
658 	}
659 
660 	clonepath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
661 	(void) snprintf(clonepath, MAXPATHLEN,
662 	    "/devices/pseudo/clone@0:%s", drv_name);
663 
664 	rc = ldi_open_by_name(clonepath, FREAD|FWRITE, CRED(), &lh, li);
665 	ldi_ident_release(li);
666 	if (rc) {
667 		cmn_err(CE_WARN,
668 		    "getmacaddr: ldi_open_by_name(%s) failed: %d\n",
669 		    clonepath, rc);
670 		kmem_free(clonepath, MAXPATHLEN);
671 		return (NULL);
672 	}
673 	kmem_free(clonepath, MAXPATHLEN);
674 
675 	ppa = i_ddi_devi_get_ppa(dip);
676 	if ((dl_attach(lh, ppa, NULL) != 0) ||
677 	    (dl_bind(lh, ETHERTYPE_IP, NULL) != 0)) {
678 		(void) ldi_close(lh, FREAD|FWRITE, CRED());
679 		cmn_err(CE_WARN,
680 		    "getmacaddr: dl_attach/bind(%s%d) failed: %d\n",
681 		    drv_name, ppa, rc);
682 		return (NULL);
683 	}
684 
685 	*maclenp = ETHERADDRL;
686 	macaddr = kmem_alloc(ETHERADDRL, KM_SLEEP);
687 	if (dl_phys_addr(lh, macaddr, maclenp, NULL) != 0 ||
688 	    *maclenp != ETHERADDRL) {
689 		kmem_free(macaddr, ETHERADDRL);
690 		macaddr = NULL;
691 		*maclenp = 0;
692 		cmn_err(CE_WARN,
693 		    "getmacaddr: dl_phys_addr(%s%d) failed: %d\n",
694 		    drv_name, ppa, rc);
695 	}
696 	(void) ldi_close(lh, FREAD|FWRITE, CRED());
697 	return (macaddr);
698 }
699 #endif	/* !_OBP */
700