137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/* $NetBSD: devopen.c,v 1.7 2008/04/28 20:23:34 martin 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 <sys/disklabel.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/ext2fs.h>
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#include <lib/libsa/dosfs.h>
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#include <lib/libkern/libkern.h>
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int net_open(struct open_file *, ...);
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int net_close(struct open_file *);
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int net_strategy(void *, int, daddr_t, size_t, void *, size_t *);
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int wdopen(struct open_file *, ...);
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int wdclose(struct open_file *);
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int wdstrategy(void *, int, daddr_t, size_t, void *, size_t *);
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int parsefstype(void *);
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static void parseunit(const char *, int *, int *, char **);
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struct devsw devsw[] = {
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{ "net", net_strategy, net_open, net_close, noioctl },
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{ "dsk", wdstrategy, wdopen, wdclose, noioctl },
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};
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int ndevs = sizeof(devsw) / sizeof(devsw[0]);
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struct fs_ops fssw[] = {
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FS_OPS(nfs),
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FS_OPS(ffsv1),
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FS_OPS(ext2fs),
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FS_OPS(dosfs),
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};
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struct fs_ops file_system[1];
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int nfsys = 1;
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int
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devopen(of, name, file)
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struct open_file *of;
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const char *name;
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char **file;
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{
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int error, 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 (strcmp("net:", name) == 0) {
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of->f_dev = &devsw[0];
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if ((error = net_open(of, name)) != 0)
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return error;
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file_system[0] = fssw[0];
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*file = bootfile; /* resolved fname */
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return 0; /* NFS */
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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 = &devsw[1];
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if ((error = wdopen(of, unit, part)) != 0)
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return error;
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switch (parsefstype(of->f_devdata)) {
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default:
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case FS_BSDFFS:
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file_system[0] = fssw[1]; break;
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case FS_EX2FS:
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file_system[0] = fssw[2]; break;
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case FS_MSDOS:
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file_system[0] = fssw[3]; break;
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}
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return 0;
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}
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return ENOENT;
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}
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/* ARGSUSED */
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int
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noioctl(f, cmd, data)
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struct open_file *f;
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u_long cmd;
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void *data;
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{
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return EINVAL;
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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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