1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
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37 * $FreeBSD: head/sys/nfsclient/nfs_diskless.c 103770 2002-09-22 00:59:02Z jake $
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37 * $FreeBSD: head/sys/nfsclient/nfs_diskless.c 108172 2002-12-22 05:35:03Z hsu $ |
38 */ 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/kernel.h> 43#include <sys/malloc.h> 44#include <sys/mount.h> 45 46#include <sys/socket.h> 47#include <net/if.h> 48#include <net/if_dl.h> 49#include <net/if_types.h> 50#include <net/if_var.h> 51#include <net/ethernet.h> 52#include <netinet/in.h> 53#include <nfs/rpcv2.h> 54#include <nfs/nfsproto.h> 55#include <nfsclient/nfs.h> 56#include <nfsclient/nfsdiskless.h> 57 58static int inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa); 59static int hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa); 60static int decode_nfshandle(char *ev, u_char *fh); 61 62/* 63 * Populate the essential fields in the nfsv3_diskless structure. 64 * 65 * The loader is expected to export the following environment variables: 66 * 67 * boot.netif.ip IP address on boot interface 68 * boot.netif.netmask netmask on boot interface 69 * boot.netif.gateway default gateway (optional) 70 * boot.netif.hwaddr hardware address of boot interface 71 * boot.nfsroot.server IP address of root filesystem server 72 * boot.nfsroot.path path of the root filesystem on server 73 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 74 */ 75void 76nfs_setup_diskless(void) 77{ 78 struct nfs_diskless *nd = &nfs_diskless; 79 struct ifnet *ifp; 80 struct ifaddr *ifa; 81 struct sockaddr_dl *sdl, ourdl; 82 struct sockaddr_in myaddr, netmask; 83 char *cp; 84 85 if (nfs_diskless_valid) 86 return; 87 /* set up interface */ 88 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 89 return; 90 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 91 printf("nfs_diskless: no netmask\n"); 92 return; 93 } 94 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 95 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 96 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 97 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 98 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 99 100 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 101 printf("nfs_diskless: no hardware address\n"); 102 return; 103 } 104 ifa = NULL;
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105 IFNET_RLOCK(); |
106 TAILQ_FOREACH(ifp, &ifnet, if_link) { 107 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 108 if ((ifa->ifa_addr->sa_family == AF_LINK) && 109 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 110 if ((sdl->sdl_type == ourdl.sdl_type) && 111 (sdl->sdl_alen == ourdl.sdl_alen) && 112 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 113 ourdl.sdl_data + ourdl.sdl_nlen,
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113 sdl->sdl_alen))
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114 sdl->sdl_alen)) { 115 IFNET_RUNLOCK(); |
116 goto match_done;
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117 } |
118 } 119 } 120 }
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121 IFNET_RUNLOCK(); |
122 printf("nfs_diskless: no interface\n"); 123 return; /* no matching interface */ 124match_done: 125 sprintf(nd->myif.ifra_name, "%s%d", ifp->if_name, ifp->if_unit); 126 127 /* set up gateway */ 128 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 129 130 /* XXX set up swap? */ 131 132 /* set up root mount */ 133 nd->root_args.rsize = 8192; /* XXX tunable? */ 134 nd->root_args.wsize = 8192; 135 nd->root_args.sotype = SOCK_DGRAM; 136 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT); 137 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 138 printf("nfs_diskless: no server\n"); 139 return; 140 } 141 nd->root_saddr.sin_port = htons(NFS_PORT); 142 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 143 printf("nfs_diskless: no NFS handle\n"); 144 return; 145 } 146 if ((cp = getenv("boot.nfsroot.path")) != NULL) { 147 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 148 freeenv(cp); 149 } 150 151 nfs_diskless_valid = 1; 152} 153 154static int 155inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 156{ 157 u_int32_t a[4]; 158 char *cp; 159 int count; 160 161 bzero(sa, sizeof(*sa)); 162 sa->sin_len = sizeof(*sa); 163 sa->sin_family = AF_INET; 164 165 if ((cp = getenv(ev)) == NULL) 166 return (1); 167 count = sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]); 168 freeenv(cp); 169 if (count != 4) 170 return (1); 171 sa->sin_addr.s_addr = 172 htonl((a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3]); 173 return (0); 174} 175 176static int 177hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 178{ 179 char *cp; 180 u_int32_t a[6]; 181 int count; 182 183 bzero(sa, sizeof(*sa)); 184 sa->sdl_len = sizeof(*sa); 185 sa->sdl_family = AF_LINK; 186 sa->sdl_type = IFT_ETHER; 187 sa->sdl_alen = ETHER_ADDR_LEN; 188 if ((cp = getenv(ev)) == NULL) 189 return (1); 190 count = sscanf(cp, "%x:%x:%x:%x:%x:%x", 191 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]); 192 freeenv(cp); 193 if (count != 6) 194 return (1); 195 sa->sdl_data[0] = a[0]; 196 sa->sdl_data[1] = a[1]; 197 sa->sdl_data[2] = a[2]; 198 sa->sdl_data[3] = a[3]; 199 sa->sdl_data[4] = a[4]; 200 sa->sdl_data[5] = a[5]; 201 return (0); 202} 203 204static int 205decode_nfshandle(char *ev, u_char *fh) 206{ 207 u_char *cp, *ep; 208 int len, val; 209 210 ep = cp = getenv(ev); 211 if (cp == NULL) 212 return (0); 213 if ((strlen(cp) < 2) || (*cp != 'X')) { 214 freeenv(ep); 215 return (0); 216 } 217 len = 0; 218 cp++; 219 for (;;) { 220 if (*cp == 'X') { 221 freeenv(ep); 222 return (len); 223 } 224 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) { 225 freeenv(ep); 226 return (0); 227 } 228 *(fh++) = val; 229 len++; 230 cp += 2; 231 if (len > NFSX_V2FH) { 232 freeenv(ep); 233 return (0); 234 } 235 } 236}
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