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Allow booting from wedges.

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This commit is contained in:
martin 2006-08-14 12:11:26 +00:00
parent fc371b8f09
commit 1db4d327d9
1 changed files with 77 additions and 2 deletions
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79
sys/arch/sparc64/sparc64/autoconf.c
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@ -1,4 +1,4 @@
/* $NetBSD: autoconf.c,v 1.115 2006/03/29 04:16:48 thorpej Exp $ */
/* $NetBSD: autoconf.c,v 1.116 2006/08/14 12:11:26 martin Exp $ */
/*
* Copyright (c) 1996
@ -48,7 +48,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.115 2006/03/29 04:16:48 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.116 2006/08/14 12:11:26 martin Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
@ -64,10 +64,13 @@ __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.115 2006/03/29 04:16:48 thorpej Exp $
#include <sys/reboot.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/fcntl.h>
#include <sys/queue.h>
#include <sys/msgbuf.h>
#include <sys/boot_flag.h>
#include <sys/ksyms.h>
#include <sys/kauth.h>
#include <net/if.h>
@ -578,12 +581,56 @@ cpu_configure()
(void)spl0();
}
static struct vnode *
opendisk(struct device *dv)
{
int bmajor;
struct vnode *tmpvn;
int error;
/*
* Lookup major number for disk block device.
*/
bmajor = devsw_name2blk(dv->dv_xname, NULL, 0);
if (bmajor == -1)
return NULL;
/*
* Fake a temporary vnode for the disk, open it, and read
* and hash the sectors.
*/
if (bdevvp(MAKEDISKDEV(bmajor, device_unit(dv), RAW_PART), &tmpvn))
panic("%s: can't alloc vnode for %s", __func__, dv->dv_xname);
error = VOP_OPEN(tmpvn, FREAD, NOCRED, 0);
if (error) {
#ifndef DEBUG
/*
* Ignore errors caused by missing device, partition,
* or medium.
*/
if (error != ENXIO && error != ENODEV)
#endif
printf("%s: can't open dev %s (%d)\n",
__func__, dv->dv_xname, error);
vput(tmpvn);
return NULL;
}
return tmpvn;
}
void
cpu_rootconf()
{
struct bootpath *bp;
int bootpartition;
struct dkwedge_list wl;
struct dkwedge_info *wi;
struct vnode *vn;
char diskname[16];
int i, error;
KASSERT(booted_device != NULL);
bp = nbootpath == 0 ? NULL : &bootpath[nbootpath-1];
if (bp == NULL)
@ -593,6 +640,34 @@ cpu_rootconf()
else
bootpartition = bp->val[2];
if ((vn = opendisk(booted_device)) == NULL)
goto nowedge;
wl.dkwl_bufsize = sizeof(*wi) * 16;
wl.dkwl_buf = wi = malloc(wl.dkwl_bufsize, M_TEMP, M_WAITOK);
error = VOP_IOCTL(vn, DIOCLWEDGES, &wl, FREAD, NOCRED, 0);
vput(vn);
if (error)
goto nowedge2;
snprintf(diskname, sizeof(diskname), "%s%c", booted_device->dv_xname,
bootpartition + 'a');
for (i = 0; i < wl.dkwl_ncopied; i++) {
if (strcmp(wi[i].dkw_wname, diskname) == 0)
break;
}
if (i == wl.dkwl_ncopied)
goto nowedge2;
dkwedge_set_bootwedge(booted_device, wi[i].dkw_offset, wi[i].dkw_size);
free(wi, M_TEMP);
setroot(booted_wedge, 0);
return;
nowedge2:
free(wi, M_TEMP);
nowedge:
setroot(booted_device, bootpartition);
}