2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include "opt_bootp.h"
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>
46 #include <sys/socket.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 <rpc/rpcclnt.h>
54 #include <nfs/rpcv2.h>
55 #include <nfs/nfsproto.h>
56 #include <nfsclient/nfs.h>
57 #include <nfsclient/nfsdiskless.h>
59 static int inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa);
60 static int hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa);
61 static int decode_nfshandle(char *ev, u_char *fh);
64 * Validate/sanity check a rsize/wsize parameter.
67 checkrwsize(unsigned long v, const char *name)
70 * 32K is used as an upper bound because most servers
71 * limit block size to satisfy IPv4's limit of
72 * 64K/reassembled packet. The lower bound is pretty
75 if (!(4 <= v && v <= 32*1024)) {
76 printf("nfs_parse_options: invalid %s %lu ignored\n", name, v);
83 * Parse mount options and apply them to the supplied
84 * nfs_diskless state. Used also by bootp/dhcp support.
87 nfs_parse_options(const char *envopts, struct nfs_args *nd)
89 char *opts, *o, *otmp;
92 opts = strdup(envopts, M_TEMP);
94 while ((o = strsep(&otmp, ":;, ")) != NULL) {
96 ; /* Skip empty options. */
97 else if (strcmp(o, "soft") == 0)
98 nd->flags |= NFSMNT_SOFT;
99 else if (strcmp(o, "intr") == 0)
100 nd->flags |= NFSMNT_INT;
101 else if (strcmp(o, "conn") == 0)
102 nd->flags |= NFSMNT_NOCONN;
103 else if (strcmp(o, "nolockd") == 0)
104 nd->flags |= NFSMNT_NOLOCKD;
105 else if (strcmp(o, "nfsv2") == 0)
106 nd->flags &= ~(NFSMNT_NFSV3 | NFSMNT_NFSV4);
107 else if (strcmp(o, "nfsv3") == 0) {
108 nd->flags &= ~NFSMNT_NFSV4;
109 nd->flags |= NFSMNT_NFSV3;
110 } else if (strcmp(o, "tcp") == 0)
111 nd->sotype = SOCK_STREAM;
112 else if (strcmp(o, "udp") == 0)
113 nd->sotype = SOCK_DGRAM;
114 else if (strncmp(o, "rsize=", 6) == 0) {
115 v = strtoul(o+6, NULL, 10);
116 if (checkrwsize(v, "rsize")) {
118 nd->flags |= NFSMNT_RSIZE;
120 } else if (strncmp(o, "wsize=", 6) == 0) {
121 v = strtoul(o+6, NULL, 10);
122 if (checkrwsize(v, "wsize")) {
124 nd->flags |= NFSMNT_WSIZE;
127 printf("%s: skipping unknown option \"%s\"\n",
134 * Populate the essential fields in the nfsv3_diskless structure.
136 * The loader is expected to export the following environment variables:
138 * boot.netif.name name of boot interface
139 * boot.netif.ip IP address on boot interface
140 * boot.netif.netmask netmask on boot interface
141 * boot.netif.gateway default gateway (optional)
142 * boot.netif.hwaddr hardware address of boot interface
143 * boot.nfsroot.server IP address of root filesystem server
144 * boot.nfsroot.path path of the root filesystem on server
145 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
146 * boot.nfsroot.options NFS options for the root filesystem
149 nfs_setup_diskless(void)
151 struct nfs_diskless *nd = &nfs_diskless;
154 struct sockaddr_dl *sdl, ourdl;
155 struct sockaddr_in myaddr, netmask;
158 if (nfs_diskless_valid)
160 /* set up interface */
161 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
163 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
164 printf("nfs_diskless: no netmask\n");
167 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
168 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
169 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
170 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
171 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
173 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
174 printf("nfs_diskless: no hardware address\n");
179 TAILQ_FOREACH(ifp, &ifnet, if_link) {
180 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
181 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
182 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
183 if ((sdl->sdl_type == ourdl.sdl_type) &&
184 (sdl->sdl_alen == ourdl.sdl_alen) &&
185 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
186 ourdl.sdl_data + ourdl.sdl_nlen,
195 printf("nfs_diskless: no interface\n");
196 return; /* no matching interface */
198 setenv("boot.netif.name", ifp->if_xname);
199 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
202 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
204 /* set up root mount */
205 nd->root_args.rsize = 8192; /* XXX tunable? */
206 nd->root_args.wsize = 8192;
207 nd->root_args.sotype = SOCK_DGRAM;
208 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
209 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
210 printf("nfs_diskless: no server\n");
213 nd->root_saddr.sin_port = htons(NFS_PORT);
214 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
215 printf("nfs_diskless: no NFS handle\n");
218 if ((cp = getenv("boot.nfsroot.path")) != NULL) {
219 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
222 if ((cp = getenv("boot.nfsroot.options")) != NULL) {
223 struct nfs_args args;
225 /* XXX yech, convert between old and current arg format */
226 args.flags = nd->root_args.flags;
227 args.sotype = nd->root_args.sotype;
228 args.rsize = nd->root_args.rsize;
229 args.wsize = nd->root_args.wsize;
230 nfs_parse_options(cp, &args);
231 nd->root_args.flags = args.flags;
232 nd->root_args.sotype = args.sotype;
233 nd->root_args.rsize = args.rsize;
234 nd->root_args.wsize = args.wsize;
238 nfs_diskless_valid = 1;
242 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
248 bzero(sa, sizeof(*sa));
249 sa->sin_len = sizeof(*sa);
250 sa->sin_family = AF_INET;
252 if ((cp = getenv(ev)) == NULL)
254 count = sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]);
258 sa->sin_addr.s_addr =
259 htonl((a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3]);
264 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
270 bzero(sa, sizeof(*sa));
271 sa->sdl_len = sizeof(*sa);
272 sa->sdl_family = AF_LINK;
273 sa->sdl_type = IFT_ETHER;
274 sa->sdl_alen = ETHER_ADDR_LEN;
275 if ((cp = getenv(ev)) == NULL)
277 count = sscanf(cp, "%x:%x:%x:%x:%x:%x",
278 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]);
282 sa->sdl_data[0] = a[0];
283 sa->sdl_data[1] = a[1];
284 sa->sdl_data[2] = a[2];
285 sa->sdl_data[3] = a[3];
286 sa->sdl_data[4] = a[4];
287 sa->sdl_data[5] = a[5];
292 decode_nfshandle(char *ev, u_char *fh)
297 ep = cp = getenv(ev);
300 if ((strlen(cp) < 2) || (*cp != 'X')) {
311 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) {
318 if (len > NFSX_V2FH) {
325 #if !defined(BOOTP_NFSROOT)
330 nfs_setup_diskless();
331 if (nfs_diskless_valid)
332 rootdevnames[0] = "nfs:";
335 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, nfs_rootconf, NULL)