NetBSD/sys/arch/sandpoint/stand/netboot/devopen.c
2008-04-28 20:22:51 +00:00

137 lines
3.8 KiB
C

/* $NetBSD: devopen.c,v 1.7 2008/04/28 20:23:34 martin Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 THE FOUNDATION OR CONTRIBUTORS
* 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 <sys/disklabel.h>
#include <netinet/in.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/nfs.h>
#include <lib/libsa/ufs.h>
#include <lib/libsa/ext2fs.h>
#include <lib/libsa/dosfs.h>
#include <lib/libkern/libkern.h>
int net_open(struct open_file *, ...);
int net_close(struct open_file *);
int net_strategy(void *, int, daddr_t, size_t, void *, size_t *);
int wdopen(struct open_file *, ...);
int wdclose(struct open_file *);
int wdstrategy(void *, int, daddr_t, size_t, void *, size_t *);
int parsefstype(void *);
static void parseunit(const char *, int *, int *, char **);
struct devsw devsw[] = {
{ "net", net_strategy, net_open, net_close, noioctl },
{ "dsk", wdstrategy, wdopen, wdclose, noioctl },
};
int ndevs = sizeof(devsw) / sizeof(devsw[0]);
struct fs_ops fssw[] = {
FS_OPS(nfs),
FS_OPS(ffsv1),
FS_OPS(ext2fs),
FS_OPS(dosfs),
};
struct fs_ops file_system[1];
int nfsys = 1;
int
devopen(of, name, file)
struct open_file *of;
const char *name;
char **file;
{
int error, unit, part;
extern char bootfile[]; /* handed by DHCP */
if (of->f_flags != F_READ)
return EPERM;
if (strcmp("net:", name) == 0) {
of->f_dev = &devsw[0];
if ((error = net_open(of, name)) != 0)
return error;
file_system[0] = fssw[0];
*file = bootfile; /* resolved fname */
return 0; /* NFS */
}
if (name[0] == 'w' && name[1] == 'd') {
parseunit(&name[2], &unit, &part, file);
of->f_dev = &devsw[1];
if ((error = wdopen(of, unit, part)) != 0)
return error;
switch (parsefstype(of->f_devdata)) {
default:
case FS_BSDFFS:
file_system[0] = fssw[1]; break;
case FS_EX2FS:
file_system[0] = fssw[2]; break;
case FS_MSDOS:
file_system[0] = fssw[3]; break;
}
return 0;
}
return ENOENT;
}
/* ARGSUSED */
int
noioctl(f, cmd, data)
struct open_file *f;
u_long cmd;
void *data;
{
return EINVAL;
}
static void
parseunit(const char *name, int *unitp, int *partp, char **pathp)
{
const char *p = name;
int unit, part;
unit = part = -1;
while (*p != ':' && *p != '\0') {
if (unit == -1 && *p >= '0' && *p <= '9')
unit = *p - '0';
if (part == -1 && *p >= 'a' && *p < 'a' + 16)
part = *p - 'a';
p += 1;
}
*unitp = (unit == -1) ? 0 : unit;
*partp = (part == -1) ? 0 : part;
*pathp = (*p == ':') ? (char *)p + 1 : NULL;
}