130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/* $NetBSD: devopen.c,v 1.3 2014/01/05 21:09:33 jakllsch Exp $ */
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/*-
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tohru Nishimura.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <lib/libsa/stand.h>
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#include <lib/libsa/nfs.h>
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#include <lib/libsa/ufs.h>
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#include <lib/libsa/tftp.h>
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#include <lib/libkern/libkern.h>
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#include "globals.h"
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#include "memfs.h"
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struct devsw devnet = { "net", net_strategy, net_open, net_close, noioctl };
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struct devsw devdsk = { "dsk", dsk_strategy, dsk_open, dsk_close, noioctl };
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struct fs_ops file_system[1] = { FS_OPS(null) };
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int nfsys = 1;
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struct fs_ops fs_nfs = FS_OPS(nfs);
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struct fs_ops fs_tftp = FS_OPS(tftp);
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struct fs_ops fs_ffsv2 = FS_OPS(ffsv2);
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struct fs_ops fs_ffsv1 = FS_OPS(ffsv1);
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struct fs_ops fs_mem = FS_OPS(mem);
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static void parseunit(const char *, int *, int *, char **);
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int
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devopen(struct open_file *of, const char *name, char **file)
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{
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int error;
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int unit, part;
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extern char bootfile[]; /* handed by DHCP */
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if (of->f_flags != F_READ)
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return EPERM;
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if (strncmp("mem:", name, 4) == 0) {
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of->f_dev = NULL;
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of->f_flags |= F_NODEV;
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file_system[0] = fs_mem;
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*file = (char *)&name[4];
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return 0; /* MEM */
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}
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if (strncmp("net:", name, 4) == 0 || strncmp("nfs:", name, 4) == 0) {
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of->f_dev = &devnet;
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if ((error = net_open(of, &name[4], "nfs")) != 0)
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return error;
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file_system[0] = fs_nfs;
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*file = bootfile; /* resolved fname */
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return 0; /* NFS */
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}
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if (strncmp("tftp:", name, 5) == 0) {
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of->f_dev = &devnet;
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if ((error = net_open(of, &name[5], "tftp")) != 0)
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return error;
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file_system[0] = fs_tftp;
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*file = bootfile; /* resolved fname */
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return 0; /* TFTP */
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}
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if (name[0] == 'w' && name[1] == 'd') {
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parseunit(&name[2], &unit, &part, file);
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of->f_dev = &devdsk;
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if (*file == NULL || **file <= ' ')
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*file = "netbsd";
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if ((error = dsk_open(of, unit, part, *file)) != 0)
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return error;
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file_system[0] = *dsk_fsops(of);
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return 0; /* FFS */
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}
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return ENOENT;
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}
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static void
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parseunit(const char *name, int *unitp, int *partp, char **pathp)
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{
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const char *p = name;
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int unit, part;
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unit = part = -1;
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while (*p != ':' && *p != '\0') {
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if (unit == -1 && *p >= '0' && *p <= '9')
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unit = *p - '0';
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if (part == -1 && *p >= 'a' && *p < 'a' + 16)
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part = *p - 'a';
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p += 1;
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}
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*unitp = (unit == -1) ? 0 : unit;
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*partp = (part == -1) ? 0 : part;
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*pathp = (*p == ':') ? (char *)p + 1 : NULL;
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}
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/* ARGSUSED */
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int
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noioctl(struct open_file *f, u_long cmd, void *data)
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{
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return EINVAL;
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}
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