sys/arch/sandpoint/stand/netboot/devopen.c

   1 /* $NetBSD: devopen.c,v 1.9 2009/03/14 15:36:13 dsl Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Tohru Nishimura.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/param.h>
  33
  34 #include <netinet/in.h>
  35
  36 #include <lib/libsa/stand.h>
  37 #include <lib/libsa/nfs.h>
  38 #include <lib/libkern/libkern.h>
  39
  40 #include "globals.h"
  41
  42 struct devsw devsw[] = {
  43         { "net", net_strategy, net_open, net_close, noioctl },
  44 };
  45 int ndevs = sizeof(devsw) / sizeof(devsw[0]);
  46
  47 struct fs_ops fssw[] = {
  48         FS_OPS(nfs),
  49 };
  50 struct fs_ops file_system[1];
  51 int nfsys = 1;
  52
  53 int
  54 devopen(struct open_file *of, const char *name, char **file)
  55 {
  56         int error;
  57         extern char bootfile[]; /* handed by DHCP */
  58
  59         if (of->f_flags != F_READ)
  60                 return EPERM;
  61
  62         if (strcmp("net:", name) == 0) {
  63                 of->f_dev = &devsw[0];
  64                 if ((error = net_open(of, name)) != 0)
  65                         return error;
  66                 file_system[0] = fssw[0];
  67                 *file = bootfile;       /* resolved fname */
  68                 return 0;               /* NFS */
  69         }
  70 #if 0 /* later */
  71         if (name[0] == 'w' && name[1] == 'd') {
  72                 parseunit(&name[2], &unit, &part, file);
  73                 of->f_dev = &devsw[1];
  74                 if ((error = wdopen(of, unit, part)) != 0)
  75                         return error;
  76                 switch (parsefstype(of->f_devdata)) {
  77                 default:
  78                 case FS_BSDFFS:
  79                         file_system[0] = fssw[1]; break;
  80                 case FS_EX2FS:
  81                         file_system[0] = fssw[2]; break;
  82                 case FS_MSDOS:
  83                         file_system[0] = fssw[3]; break;
  84                 }
  85                 return 0;
  86         }
  87 #endif
  88         return ENOENT;
  89 }
  90
  91 /* ARGSUSED */
  92 int
  93 noioctl(struct open_file *f, u_long cmd, void *data)
  94 {
  95
  96         return EINVAL;
  97 }
  98
  99 #if 0
 100 static void
 101 parseunit(const char *name, int *unitp, int *partp, char **pathp)
 102 {
 103         const char *p = name;
 104         int unit, part;
 105
 106         unit = part = -1;
 107         while (*p != ':' && *p != '\0') {
 108                 if (unit == -1 && *p >= '0' && *p <= '9')
 109                         unit = *p - '0';
 110                 if (part == -1 && *p >= 'a' && *p < 'a' + 16)
 111                         part = *p - 'a';
 112                 p += 1;
 113         }
 114         *unitp = (unit == -1) ? 0 : unit;
 115         *partp = (part == -1) ? 0 : part;
 116         *pathp = (*p == ':') ? (char *)p + 1 : NULL;
 117 }
 118 #endif