038b8b6573
(it only allowed to boot an nfs /netbsd automatically) To make it work for people who can't tell the DHCP server to pass the right kernel file to pxeboot, without losing flexibility for people who can, do the following: Use the filename given by the DHCP server if it contains a ":". A ":" was already used to seperate filesystem and filename, so we don't lose anything. Otoh, a path to pxeboot usually doesn't contain a ":", so it should still work if we got the old pxeboot filename again.
147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/* $NetBSD: devopen.c,v 1.5 2003/11/12 18:44:08 drochner Exp $ */
|
|
|
|
/*
|
|
* Copyright 2001, 2002 Wasabi Systems, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed for the NetBSD Project by
|
|
* Wasabi Systems, Inc.
|
|
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <stand.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <net.h>
|
|
|
|
#include <libi386.h>
|
|
#ifdef _STANDALONE
|
|
#include <lib/libkern/libkern.h>
|
|
#include <bootinfo.h>
|
|
#else
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#include "pxeboot.h"
|
|
|
|
#ifdef _STANDALONE
|
|
struct btinfo_bootpath bibp;
|
|
#endif
|
|
|
|
/*
|
|
* Open the "device" named by the combined file system/file name
|
|
* given as the fname arg. Format is:
|
|
*
|
|
* nfs:netbsd
|
|
* tftp:netbsd
|
|
* netbsd
|
|
*
|
|
* If no file system is specified, we default to the first in the
|
|
* file system table (which ought to be NFS).
|
|
*
|
|
* We always open just one device (the PXE netif).
|
|
*/
|
|
int
|
|
devopen(struct open_file *f, const char *fname, char **file)
|
|
{
|
|
struct devsw *dp;
|
|
char *filename;
|
|
size_t fsnamelen;
|
|
int i, error;
|
|
|
|
dp = &devsw[0];
|
|
|
|
/* Set the default boot file system. */
|
|
bcopy(pxeboot_fstab[0].fst_ops, file_system, sizeof(struct fs_ops));
|
|
|
|
/* if we got passed a filename, pass it to the BOOTP server */
|
|
if (fname)
|
|
strncpy(bootfile, fname, FNAME_SIZE);
|
|
|
|
/* Open the device; this might give us a boot file name. */
|
|
error = (*dp->dv_open)(f, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
f->f_dev = dp;
|
|
|
|
/*
|
|
* If the DHCP server provided a file name:
|
|
* - If it contains a ":", assume it points to a NetBSD kernel.
|
|
* - If not, assume that the DHCP server was not able to pass
|
|
* a separate filename for the kernel. (The name probably
|
|
* was the same as used to load "pxeboot".) Ignore it and
|
|
* use the default in this case.
|
|
* So we cater to simple DHCP servers while being able to
|
|
* use the power of conditional behaviour in modern ones.
|
|
*/
|
|
if (strchr(bootfile, ':'))
|
|
fname = bootfile;
|
|
|
|
filename = (fname ? strchr(fname, ':') : NULL);
|
|
if (filename != NULL) {
|
|
fsnamelen = (size_t)((const char *)filename - fname);
|
|
for (i = 0; i < npxeboot_fstab; i++) {
|
|
if (strncmp(fname, pxeboot_fstab[i].fst_name,
|
|
fsnamelen) == 0) {
|
|
bcopy(pxeboot_fstab[i].fst_ops, file_system,
|
|
sizeof(struct fs_ops));
|
|
break;
|
|
}
|
|
}
|
|
if (i == npxeboot_fstab) {
|
|
printf("Invalid file system type specified in %s\n",
|
|
fname);
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
filename++;
|
|
if (filename[0] == '\0') {
|
|
printf("No file specified in %s\n", fname);
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
} else
|
|
filename = (char *)fname;
|
|
|
|
*file = filename;
|
|
|
|
#ifdef _STANDALONE
|
|
strncpy(bibp.bootpath, filename, sizeof(bibp.bootpath));
|
|
BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
|
|
#endif
|
|
|
|
return (0);
|
|
bad:
|
|
(*dp->dv_close)(f);
|
|
f->f_dev = NULL;
|
|
return (error);
|
|
}
|