sys/nfs/nfs_bootstatic.c

   1 /*      $NetBSD: nfs_bootstatic.c,v 1.7 2008/11/19 18:36:09 ad Exp $    */
   2
   3 /*
   4  *
   5  * Copyright (c) 2004 Christian Limpach.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29
  30 #include <sys/cdefs.h>
  31 __KERNEL_RCSID(0, "$NetBSD: nfs_bootstatic.c,v 1.7 2008/11/19 18:36:09 ad Exp $");
  32
  33 #ifdef _KERNEL_OPT
  34 #include "opt_nfs_boot.h"
  35 #endif
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/proc.h>
  42 #include <sys/mount.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/socket.h>
  45 #include <sys/socketvar.h>
  46
  47 #include <net/if.h>
  48 #include <net/if_types.h>
  49 #include <net/if_media.h>
  50 #include <net/route.h>
  51 #include <net/if_ether.h>
  52
  53 #include <netinet/in.h>
  54 #include <netinet/if_inarp.h>
  55
  56 #include <nfs/rpcv2.h>
  57
  58 #include <nfs/nfsproto.h>
  59 #include <nfs/nfs.h>
  60 #include <nfs/nfsmount.h>
  61 #include <nfs/nfsdiskless.h>
  62
  63 int (*nfs_bootstatic_callback)(struct nfs_diskless *) = NULL;
  64
  65 int
  66 nfs_bootstatic(struct nfs_diskless *nd, struct lwp *lwp, int *_flags)
  67 {
  68         struct ifnet *ifp = nd->nd_ifp;
  69         struct sockaddr_in *sin;
  70         int error, flags;
  71
  72         if (nfs_bootstatic_callback)
  73                 flags = (*nfs_bootstatic_callback)(nd);
  74         else
  75                 flags = 0;
  76
  77         if (flags & NFS_BOOT_NOSTATIC)
  78                 return EOPNOTSUPP;
  79
  80         if (flags == 0) {
  81 #ifdef NFS_BOOTSTATIC_MYIP
  82                 if (!(*_flags & NFS_BOOT_HAS_MYIP)) {
  83                         nd->nd_myip.s_addr = inet_addr(NFS_BOOTSTATIC_MYIP);
  84                         flags |= NFS_BOOT_HAS_MYIP;
  85                 }
  86 #endif
  87 #ifdef NFS_BOOTSTATIC_GWIP
  88                 if (!(*_flags & NFS_BOOT_HAS_GWIP)) {
  89                         nd->nd_gwip.s_addr = inet_addr(NFS_BOOTSTATIC_GWIP);
  90                         flags |= NFS_BOOT_HAS_GWIP;
  91                 }
  92 #endif
  93 #ifdef NFS_BOOTSTATIC_MASK
  94                 if (!(*_flags & NFS_BOOT_HAS_MASK)) {
  95                         nd->nd_mask.s_addr = inet_addr(NFS_BOOTSTATIC_MASK);
  96                         flags |= NFS_BOOT_HAS_MASK;
  97                 }
  98 #endif
  99 #ifdef NFS_BOOTSTATIC_SERVADDR
 100                 if (!(*_flags & NFS_BOOT_HAS_SERVADDR)) {
 101                         sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr;
 102                         memset((void *)sin, 0, sizeof(*sin));
 103                         sin->sin_len = sizeof(*sin);
 104                         sin->sin_family = AF_INET;
 105                         sin->sin_addr.s_addr = inet_addr(NFS_BOOTSTATIC_SERVADDR);
 106                         flags |= NFS_BOOT_HAS_SERVADDR;
 107                 }
 108 #endif
 109 #ifdef NFS_BOOTSTATIC_SERVER
 110                 if (!(*_flags & NFS_BOOT_HAS_SERVER)) {
 111                         strncpy(nd->nd_root.ndm_host, NFS_BOOTSTATIC_SERVER,
 112                                 MNAMELEN);
 113                         flags |= NFS_BOOT_HAS_SERVER;
 114                         if (strchr(nd->nd_root.ndm_host, ':') != NULL)
 115                                 flags |= NFS_BOOT_HAS_ROOTPATH;
 116                 }
 117 #endif
 118         }
 119
 120         *_flags |= flags;
 121
 122         if (!(*_flags & NFS_BOOT_HAS_SERVADDR) && (*_flags & NFS_BOOT_HAS_SERVER)) {
 123                 char rootserver[MNAMELEN];
 124                 char *sep;
 125
 126                 sep = strchr(nd->nd_root.ndm_host, ':');
 127                 strlcpy(rootserver, nd->nd_root.ndm_host,
 128                         sep - nd->nd_root.ndm_host+1);
 129
 130                 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr;
 131                 memset((void *)sin, 0, sizeof(*sin));
 132                 sin->sin_len = sizeof(*sin);
 133                 sin->sin_family = AF_INET;
 134                 sin->sin_addr.s_addr = inet_addr(rootserver);
 135                 flags |= NFS_BOOT_HAS_SERVADDR;
 136                 *_flags |= NFS_BOOT_HAS_SERVADDR;
 137         }
 138
 139         if (flags & NFS_BOOT_HAS_MYIP)
 140                 aprint_normal("nfs_boot: client_addr=%s\n",
 141                     inet_ntoa(nd->nd_myip));
 142
 143         if (flags & NFS_BOOT_HAS_GWIP)
 144                 aprint_normal("nfs_boot: gateway=%s\n",
 145                     inet_ntoa(nd->nd_gwip));
 146
 147         if (flags & NFS_BOOT_HAS_MASK)
 148                 aprint_normal("nfs_boot: netmask=%s\n",
 149                     inet_ntoa(nd->nd_mask));
 150
 151         if (flags & NFS_BOOT_HAS_SERVADDR) {
 152                 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr;
 153                 aprint_normal("nfs_boot: server=%s\n",
 154                     inet_ntoa(sin->sin_addr));
 155         }
 156
 157         if (flags & NFS_BOOT_HAS_SERVER)
 158                 aprint_normal("nfs_boot: root=%.*s\n", MNAMELEN,
 159                     nd->nd_root.ndm_host);
 160
 161         /*
 162          * Do enough of ifconfig(8) so that the chosen interface
 163          * can talk to the servers.
 164          */
 165         error = nfs_boot_setaddress(ifp, lwp,
 166             *_flags & NFS_BOOT_HAS_MYIP ? nd->nd_myip.s_addr : INADDR_ANY,
 167             *_flags & NFS_BOOT_HAS_MASK ? nd->nd_mask.s_addr : INADDR_ANY,
 168             INADDR_ANY);
 169         if (error) {
 170                 aprint_error("nfs_boot: set ifaddr, error=%d\n", error);
 171                 goto out;
 172         }
 173
 174         if ((*_flags & NFS_BOOT_ALLINFO) != NFS_BOOT_ALLINFO)
 175                 return EADDRNOTAVAIL;
 176
 177         error = 0;
 178
 179  out:
 180
 181         return error;
 182 }