Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / sys / i386 / i386 / autoconf.c
CommitLineData
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1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
37 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
b13267a5 38 * $DragonFly: src/sys/i386/i386/Attic/autoconf.c,v 1.27 2006/09/10 01:26:38 dillon Exp $
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39 */
40
41/*
42 * Setup the system to run on the current machine.
43 *
44 * Configure() is called at boot time and initializes the vba
45 * device tables and the memory controller monitoring. Available
46 * devices are determined (from possibilities mentioned in ioconf.c),
47 * and the drivers are initialized.
48 */
49#include "opt_bootp.h"
50#include "opt_ffs.h"
51#include "opt_cd9660.h"
52#include "opt_nfs.h"
53#include "opt_nfsroot.h"
54#include "opt_bus.h"
55#include "opt_rootdevname.h"
56
1f2de5d4 57#include "use_isa.h"
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58
59#include <sys/param.h>
60#include <sys/systm.h>
fabb8ceb 61#include <sys/bootmaj.h>
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62#include <sys/bus.h>
63#include <sys/conf.h>
64#include <sys/disklabel.h>
65#include <sys/diskslice.h>
66#include <sys/reboot.h>
67#include <sys/kernel.h>
68#include <sys/malloc.h>
69#include <sys/mount.h>
70#include <sys/cons.h>
8f41e33b 71#include <sys/thread.h>
335dda38 72#include <sys/device.h>
37e7efec 73#include <sys/machintr.h>
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74
75#include <machine/bootinfo.h>
76#include <machine/ipl.h>
77#include <machine/md_var.h>
984263bc 78#include <machine/smp.h>
27c6605f 79#include <i386/icu/icu.h>
984263bc 80
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81#include <machine/pcb.h>
82#include <machine/pcb_ext.h>
83#include <machine/vm86.h>
84#include <machine/globaldata.h>
8f41e33b 85
984263bc 86#if NISA > 0
1f2de5d4 87#include <bus/isa/isavar.h>
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88
89device_t isa_bus_device = 0;
90#endif
91
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92static void configure_first (void *);
93static void configure (void *);
94static void configure_final (void *);
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95
96#if defined(FFS) && defined(FFS_ROOT)
3ae0cd58 97static void setroot (void);
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98#endif
99
100#if defined(NFS) && defined(NFS_ROOT)
f15db79e 101#if !defined(BOOTP_NFSROOT)
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102static void pxe_setup_nfsdiskless(void);
103#endif
f15db79e 104#endif
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105
106SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
107/* SI_ORDER_SECOND is hookable */
108SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
109/* SI_ORDER_MIDDLE is hookable */
110SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
111
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112cdev_t rootdev = NOCDEV;
113cdev_t dumpdev = NOCDEV;
984263bc 114
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115/*
116 * Determine i/o configuration for a machine.
117 */
118static void
119configure_first(dummy)
120 void *dummy;
121{
122}
123
124static void
125configure(dummy)
126 void *dummy;
127{
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128 /*
129 * Final interrupt support acviation, then enable hardware interrupts.
984263bc 130 */
37e7efec 131 MachIntrABI.finalize();
8a8d5d85 132 cpu_enable_intr();
984263bc 133
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134 /*
135 * This will configure all devices, generally starting with the
136 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
137 * dummies up the attach in order to delay legacy initialization
138 * until after all other busses/subsystems have had a chance
139 * at those resources.
140 */
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141 root_bus_configure();
142
143#if NISA > 0
144 /*
145 * Explicitly probe and attach ISA last. The isa bus saves
146 * it's device node at attach time for us here.
147 */
148 if (isa_bus_device)
149 isa_probe_children(isa_bus_device);
150#endif
151
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152 /*
153 * Allow lowering of the ipl to the lowest kernel level if we
154 * panic (or call tsleep() before clearing `cold'). No level is
155 * completely safe (since a panic may occur in a critical region
156 * at splhigh()), but we want at least bio interrupts to work.
157 */
e43a034f 158 safepri = TDPRI_KERN_USER;
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159}
160
161static void
162configure_final(dummy)
163 void *dummy;
164{
165 int i;
166
167 cninit_finish();
168
169 if (bootverbose) {
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170#ifdef APIC_IO
171 imen_dump();
172#endif /* APIC_IO */
173
174 /*
175 * Print out the BIOS's idea of the disk geometries.
176 */
177 printf("BIOS Geometries:\n");
178 for (i = 0; i < N_BIOS_GEOM; i++) {
179 unsigned long bios_geom;
180 int max_cylinder, max_head, max_sector;
181
182 bios_geom = bootinfo.bi_bios_geom[i];
183
184 /*
185 * XXX the bootstrap punts a 1200K floppy geometry
186 * when the get-disk-geometry interrupt fails. Skip
187 * drives that have this geometry.
188 */
189 if (bios_geom == 0x4f010f)
190 continue;
191
192 printf(" %x:%08lx ", i, bios_geom);
193 max_cylinder = bios_geom >> 16;
194 max_head = (bios_geom >> 8) & 0xff;
195 max_sector = bios_geom & 0xff;
196 printf(
197 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
198 max_cylinder, max_cylinder + 1,
199 max_head, max_head + 1,
200 max_sector, max_sector);
201 }
202 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
203
204 printf("Device configuration finished.\n");
205 }
206 cold = 0;
207}
208
209#ifdef BOOTP
f15db79e 210void bootpc_init(void);
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211#endif
212/*
213 * Do legacy root filesystem discovery.
214 */
215void
216cpu_rootconf()
217{
218#ifdef BOOTP
219 bootpc_init();
220#endif
221#if defined(NFS) && defined(NFS_ROOT)
222#if !defined(BOOTP_NFSROOT)
223 pxe_setup_nfsdiskless();
224 if (nfs_diskless_valid)
225#endif
226 rootdevnames[0] = "nfs:";
227#endif
228#if defined(FFS) && defined(FFS_ROOT)
229 if (!rootdevnames[0])
230 setroot();
231#endif
232}
233SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
234
b13267a5 235u_long bootdev = 0; /* not a cdev_t - encoding is different */
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236
237#if defined(FFS) && defined(FFS_ROOT)
238#define FDMAJOR 2
239#define FDUNITSHIFT 6
240
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241/*
242 * The boot code uses old block device major numbers to pass bootdev to
243 * us. We have to translate these to character device majors because
244 * we don't have block devices any more.
245 */
246static int
247boot_translate_majdev(int bmajor)
248{
249 static int conv[] = { BOOTMAJOR_CONVARY };
250
251 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
252 return(conv[bmajor]);
253 return(-1);
254}
255
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256/*
257 * Attempt to find the device from which we were booted.
258 * If we can do so, and not instructed not to do so,
259 * set rootdevs[] and rootdevnames[] to correspond to the
260 * boot device(s).
261 *
262 * This code survives in order to allow the system to be
263 * booted from legacy environments that do not correctly
264 * populate the kernel environment. There are significant
265 * restrictions on the bootability of the system in this
266 * situation; it can only be mounting root from a 'da'
267 * 'wd' or 'fd' device, and the root filesystem must be ufs.
268 */
269static void
270setroot()
271{
272 int majdev, mindev, unit, slice, part;
b13267a5 273 cdev_t newrootdev, dev;
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274 char partname[2];
275 char *sname;
276
277 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
278 printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
279 return;
280 }
fabb8ceb 281 majdev = boot_translate_majdev(B_TYPE(bootdev));
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282 if (bootverbose) {
283 printf("bootdev: %08lx type=%ld unit=%ld "
284 "slice=%ld part=%ld major=%d\n",
285 bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
286 B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
287 }
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288 dev = udev2dev(makeudev(majdev, 0), 0);
289 if (!dev_is_good(dev))
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290 return;
291 unit = B_UNIT(bootdev);
292 slice = B_SLICE(bootdev);
293 if (slice == WHOLE_DISK_SLICE)
294 slice = COMPATIBILITY_SLICE;
295 if (slice < 0 || slice >= MAX_SLICES) {
296 printf("bad slice\n");
297 return;
298 }
299
300 /*
301 * XXX kludge for inconsistent unit numbering and lack of slice
302 * support for floppies.
303 */
fabb8ceb 304 if (majdev == FD_CDEV_MAJOR) {
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305 slice = COMPATIBILITY_SLICE;
306 part = RAW_PART;
307 mindev = unit << FDUNITSHIFT;
308 } else {
309 part = B_PARTITION(bootdev);
310 mindev = dkmakeminor(unit, slice, part);
311 }
e4c9c0c8 312 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
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313 if (!dev_is_good(newrootdev))
314 return;
984263bc 315 sname = dsname(newrootdev, unit, slice, part, partname);
efda3bd0 316 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
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317 sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
318
319 /*
320 * For properly dangerously dedicated disks (ones with a historical
321 * bogus partition table), the boot blocks will give slice = 4, but
322 * the kernel will only provide the compatibility slice since it
323 * knows that slice 4 is not a real slice. Arrange to try mounting
324 * the compatibility slice as root if mounting the slice passed by
325 * the boot blocks fails. This handles the dangerously dedicated
326 * case and perhaps others.
327 */
328 if (slice == COMPATIBILITY_SLICE)
329 return;
330 slice = COMPATIBILITY_SLICE;
331 sname = dsname(newrootdev, unit, slice, part, partname);
efda3bd0 332 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
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333 sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
334}
335#endif
336
337#if defined(NFS) && defined(NFS_ROOT)
f15db79e 338#if !defined(BOOTP_NFSROOT)
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339
340#include <sys/socket.h>
341#include <net/if.h>
342#include <net/if_dl.h>
343#include <net/if_types.h>
344#include <net/if_var.h>
345#include <net/ethernet.h>
346#include <netinet/in.h>
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347#include <vfs/nfs/rpcv2.h>
348#include <vfs/nfs/nfsproto.h>
349#include <vfs/nfs/nfs.h>
350#include <vfs/nfs/nfsdiskless.h>
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351
352extern struct nfs_diskless nfs_diskless;
353
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354/*
355 * Convert a kenv variable to a sockaddr. If the kenv variable does not
356 * exist the sockaddr will remain zerod out (callers typically just check
357 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
358 */
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359static int
360inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
361{
362 u_int32_t a[4];
363 char *cp;
364
365 bzero(sa, sizeof(*sa));
984263bc 366
bc01a404 367 if ((cp = kgetenv(ev)) == NULL)
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368 return(1);
369 if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
370 return(1);
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371 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
372 return(1);
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373 /* XXX is this ordering correct? */
374 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
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375 sa->sin_len = sizeof(*sa);
376 sa->sin_family = AF_INET;
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377 return(0);
378}
379
380static int
381hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
382{
383 char *cp;
384 u_int32_t a[6];
385
386 bzero(sa, sizeof(*sa));
387 sa->sdl_len = sizeof(*sa);
388 sa->sdl_family = AF_LINK;
389 sa->sdl_type = IFT_ETHER;
390 sa->sdl_alen = ETHER_ADDR_LEN;
bc01a404 391 if ((cp = kgetenv(ev)) == NULL)
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392 return(1);
393 if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
394 return(1);
395 sa->sdl_data[0] = a[0];
396 sa->sdl_data[1] = a[1];
397 sa->sdl_data[2] = a[2];
398 sa->sdl_data[3] = a[3];
399 sa->sdl_data[4] = a[4];
400 sa->sdl_data[5] = a[5];
401 return(0);
402}
403
404static int
405decode_nfshandle(char *ev, u_char *fh)
406{
407 u_char *cp;
408 int len, val;
409
bc01a404 410 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
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411 return(0);
412 len = 0;
413 cp++;
414 for (;;) {
415 if (*cp == 'X')
416 return(len);
417 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff))
418 return(0);
419 *(fh++) = val;
420 len++;
421 cp += 2;
422 if (len > NFSX_V2FH)
423 return(0);
424 }
425}
426
427/*
428 * Populate the essential fields in the nfsv3_diskless structure.
429 *
430 * The loader is expected to export the following environment variables:
431 *
432 * boot.netif.ip IP address on boot interface
433 * boot.netif.netmask netmask on boot interface
434 * boot.netif.gateway default gateway (optional)
435 * boot.netif.hwaddr hardware address of boot interface
436 * boot.nfsroot.server IP address of root filesystem server
437 * boot.nfsroot.path path of the root filesystem on server
438 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
439 */
440static void
441pxe_setup_nfsdiskless()
442{
443 struct nfs_diskless *nd = &nfs_diskless;
444 struct ifnet *ifp;
445 struct ifaddr *ifa;
446 struct sockaddr_dl *sdl, ourdl;
447 struct sockaddr_in myaddr, netmask;
448 char *cp;
449
450 /* set up interface */
451 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
452 return;
453 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
454 printf("PXE: no netmask\n");
455 return;
456 }
457 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
458 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
459 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
460 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
461 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
462
463 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
464 printf("PXE: no hardware address\n");
465 return;
466 }
467 ifa = NULL;
468 ifp = TAILQ_FIRST(&ifnet);
469 TAILQ_FOREACH(ifp, &ifnet, if_link) {
470 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
471 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
472 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
473 if ((sdl->sdl_type == ourdl.sdl_type) &&
474 (sdl->sdl_alen == ourdl.sdl_alen) &&
475 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
476 ourdl.sdl_data + ourdl.sdl_nlen,
477 sdl->sdl_alen))
478 goto match_done;
479 }
480 }
481 }
482 printf("PXE: no interface\n");
483 return; /* no matching interface */
484match_done:
3e4a09e7 485 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
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486
487 /* set up gateway */
488 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
489
490 /* XXX set up swap? */
491
492 /* set up root mount */
493 nd->root_args.rsize = 8192; /* XXX tunable? */
494 nd->root_args.wsize = 8192;
495 nd->root_args.sotype = SOCK_DGRAM;
496 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
497 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
498 printf("PXE: no server\n");
499 return;
500 }
501 nd->root_saddr.sin_port = htons(NFS_PORT);
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502
503 /*
504 * A tftp-only loader may pass NFS path information without a
505 * root handle. Generate a warning but continue configuring.
506 */
984263bc 507 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
0e8ff41a 508 printf("PXE: Warning, no NFS handle passed from loader\n");
984263bc 509 }
bc01a404 510 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
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511 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
512
513 nfs_diskless_valid = 1;
514}
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515
516#endif
984263bc 517#endif