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>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
45 #include <sys/mount.h>
46 #include <sys/socket.h>
49 #include <net/if_dl.h>
50 #include <net/if_types.h>
51 #include <net/if_var.h>
52 #include <net/ethernet.h>
55 #include <netinet/in.h>
56 #include <nfs/nfsproto.h>
57 #include <nfsclient/nfs.h>
58 #include <nfs/nfsdiskless.h>
60 #define NFS_IFACE_TIMEOUT_SECS 10 /* Timeout for interface to appear. */
62 static int inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa);
63 static int hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa);
64 static int decode_nfshandle(char *ev, u_char *fh, int maxfh);
67 * This structure must be filled in by a primary bootstrap or bootstrap
68 * server for a diskless/dataless machine. It is initialized below just
69 * to ensure that it is allocated to initialized data (.data not .bss).
71 struct nfs_diskless nfs_diskless = { { { 0 } } };
72 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
73 int nfs_diskless_valid = 0;
76 * Validate/sanity check a rsize/wsize parameter.
79 checkrwsize(unsigned long v, const char *name)
82 * 32K is used as an upper bound because most servers
83 * limit block size to satisfy IPv4's limit of
84 * 64K/reassembled packet. The lower bound is pretty
87 if (!(4 <= v && v <= 32*1024)) {
88 printf("nfs_parse_options: invalid %s %lu ignored\n", name, v);
95 * Parse mount options and apply them to the supplied
96 * nfs_diskless state. Used also by bootp/dhcp support.
99 nfs_parse_options(const char *envopts, struct nfs_args *nd)
101 char *opts, *o, *otmp;
104 opts = strdup(envopts, M_TEMP);
106 while ((o = strsep(&otmp, ":;, ")) != NULL) {
108 ; /* Skip empty options. */
109 else if (strcmp(o, "soft") == 0)
110 nd->flags |= NFSMNT_SOFT;
111 else if (strcmp(o, "intr") == 0)
112 nd->flags |= NFSMNT_INT;
113 else if (strcmp(o, "conn") == 0)
114 nd->flags |= NFSMNT_NOCONN;
115 else if (strcmp(o, "nolockd") == 0)
116 nd->flags |= NFSMNT_NOLOCKD;
117 else if (strcmp(o, "nocto") == 0)
118 nd->flags |= NFSMNT_NOCTO;
119 else if (strcmp(o, "nfsv2") == 0)
120 nd->flags &= ~(NFSMNT_NFSV3 | NFSMNT_NFSV4);
121 else if (strcmp(o, "nfsv3") == 0) {
122 nd->flags &= ~NFSMNT_NFSV4;
123 nd->flags |= NFSMNT_NFSV3;
124 } else if (strcmp(o, "tcp") == 0)
125 nd->sotype = SOCK_STREAM;
126 else if (strcmp(o, "udp") == 0)
127 nd->sotype = SOCK_DGRAM;
128 else if (strncmp(o, "rsize=", 6) == 0) {
129 v = strtoul(o+6, NULL, 10);
130 if (checkrwsize(v, "rsize")) {
132 nd->flags |= NFSMNT_RSIZE;
134 } else if (strncmp(o, "wsize=", 6) == 0) {
135 v = strtoul(o+6, NULL, 10);
136 if (checkrwsize(v, "wsize")) {
138 nd->flags |= NFSMNT_WSIZE;
141 printf("%s: skipping unknown option \"%s\"\n",
148 * Populate the essential fields in the nfsv3_diskless structure.
150 * The loader is expected to export the following environment variables:
152 * boot.netif.name name of boot interface
153 * boot.netif.ip IP address on boot interface
154 * boot.netif.netmask netmask on boot interface
155 * boot.netif.gateway default gateway (optional)
156 * boot.netif.hwaddr hardware address of boot interface
157 * boot.netif.mtu interface mtu from bootp/dhcp (optional)
158 * boot.nfsroot.server IP address of root filesystem server
159 * boot.nfsroot.path path of the root filesystem on server
160 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
161 * boot.nfsroot.nfshandlelen and length of this handle (for NFSv3 only)
162 * boot.nfsroot.options NFS options for the root filesystem
165 nfs_setup_diskless(void)
167 struct nfs_diskless *nd = &nfs_diskless;
168 struct nfsv3_diskless *nd3 = &nfsv3_diskless;
171 struct sockaddr_dl *sdl, ourdl;
172 struct sockaddr_in myaddr, netmask;
174 int cnt, fhlen, is_nfsv3;
178 if (nfs_diskless_valid != 0)
181 /* get handle size. If this succeeds, it's an NFSv3 setup. */
182 if ((cp = kern_getenv("boot.nfsroot.nfshandlelen")) != NULL) {
183 cnt = sscanf(cp, "%d", &len);
185 if (cnt != 1 || len == 0 || len > NFSX_V3FHMAX) {
186 printf("nfs_diskless: bad NFS handle len\n");
189 nd3->root_fhsize = len;
193 /* set up interface */
194 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
196 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
197 printf("nfs_diskless: no netmask\n");
201 bcopy(&myaddr, &nd3->myif.ifra_addr, sizeof(myaddr));
202 bcopy(&myaddr, &nd3->myif.ifra_broadaddr, sizeof(myaddr));
203 ((struct sockaddr_in *)
204 &nd3->myif.ifra_broadaddr)->sin_addr.s_addr =
205 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
206 bcopy(&netmask, &nd3->myif.ifra_mask, sizeof(netmask));
208 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
209 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
210 ((struct sockaddr_in *)
211 &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
212 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
213 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
216 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
217 printf("nfs_diskless: no hardware address\n");
221 timeout_at = time_uptime + NFS_IFACE_TIMEOUT_SECS;
223 CURVNET_SET(TD_TO_VNET(curthread));
225 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
226 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
227 if (ifa->ifa_addr->sa_family == AF_LINK) {
228 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
229 if ((sdl->sdl_type == ourdl.sdl_type) &&
230 (sdl->sdl_alen == ourdl.sdl_alen) &&
243 if (time_uptime < timeout_at) {
244 pause("nfssdl", hz / 5);
247 printf("nfs_diskless: no interface\n");
248 return; /* no matching interface */
250 kern_setenv("boot.netif.name", ifp->if_xname);
252 strlcpy(nd3->myif.ifra_name, ifp->if_xname,
253 sizeof(nd3->myif.ifra_name));
256 inaddr_to_sockaddr("boot.netif.gateway", &nd3->mygateway);
258 /* set up root mount */
259 nd3->root_args.rsize = 32768; /* XXX tunable? */
260 nd3->root_args.wsize = 32768;
261 nd3->root_args.sotype = SOCK_STREAM;
262 nd3->root_args.flags = (NFSMNT_NFSV3 | NFSMNT_WSIZE |
263 NFSMNT_RSIZE | NFSMNT_RESVPORT);
264 if (inaddr_to_sockaddr("boot.nfsroot.server",
266 printf("nfs_diskless: no server\n");
269 nd3->root_saddr.sin_port = htons(NFS_PORT);
270 fhlen = decode_nfshandle("boot.nfsroot.nfshandle",
271 &nd3->root_fh[0], NFSX_V3FHMAX);
273 printf("nfs_diskless: no NFS handle\n");
276 if (fhlen != nd3->root_fhsize) {
277 printf("nfs_diskless: bad NFS handle len=%d\n", fhlen);
280 if ((cp = kern_getenv("boot.nfsroot.path")) != NULL) {
281 strncpy(nd3->root_hostnam, cp, MNAMELEN - 1);
284 if ((cp = kern_getenv("boot.nfsroot.options")) != NULL) {
285 nfs_parse_options(cp, &nd3->root_args);
289 nfs_diskless_valid = 3;
291 strlcpy(nd->myif.ifra_name, ifp->if_xname,
292 sizeof(nd->myif.ifra_name));
295 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
297 /* set up root mount */
298 nd->root_args.rsize = 8192; /* XXX tunable? */
299 nd->root_args.wsize = 8192;
300 nd->root_args.sotype = SOCK_STREAM;
301 nd->root_args.flags = (NFSMNT_WSIZE |
302 NFSMNT_RSIZE | NFSMNT_RESVPORT);
303 if (inaddr_to_sockaddr("boot.nfsroot.server",
305 printf("nfs_diskless: no server\n");
308 nd->root_saddr.sin_port = htons(NFS_PORT);
309 if (decode_nfshandle("boot.nfsroot.nfshandle",
310 &nd->root_fh[0], NFSX_V2FH) == 0) {
311 printf("nfs_diskless: no NFS handle\n");
314 if ((cp = kern_getenv("boot.nfsroot.path")) != NULL) {
315 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
318 if ((cp = kern_getenv("boot.nfsroot.options")) != NULL) {
319 struct nfs_args args;
322 * XXX yech, convert between old and current
325 args.flags = nd->root_args.flags;
326 args.sotype = nd->root_args.sotype;
327 args.rsize = nd->root_args.rsize;
328 args.wsize = nd->root_args.wsize;
329 nfs_parse_options(cp, &args);
330 nd->root_args.flags = args.flags;
331 nd->root_args.sotype = args.sotype;
332 nd->root_args.rsize = args.rsize;
333 nd->root_args.wsize = args.wsize;
337 nfs_diskless_valid = 1;
342 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
348 bzero(sa, sizeof(*sa));
349 sa->sin_len = sizeof(*sa);
350 sa->sin_family = AF_INET;
352 if ((cp = kern_getenv(ev)) == NULL)
354 count = sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]);
358 sa->sin_addr.s_addr =
359 htonl((a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3]);
364 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
370 bzero(sa, sizeof(*sa));
371 sa->sdl_len = sizeof(*sa);
372 sa->sdl_family = AF_LINK;
373 sa->sdl_type = IFT_ETHER;
374 sa->sdl_alen = ETHER_ADDR_LEN;
375 if ((cp = kern_getenv(ev)) == NULL)
377 count = sscanf(cp, "%x:%x:%x:%x:%x:%x",
378 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]);
382 sa->sdl_data[0] = a[0];
383 sa->sdl_data[1] = a[1];
384 sa->sdl_data[2] = a[2];
385 sa->sdl_data[3] = a[3];
386 sa->sdl_data[4] = a[4];
387 sa->sdl_data[5] = a[5];
392 decode_nfshandle(char *ev, u_char *fh, int maxfh)
397 ep = cp = kern_getenv(ev);
400 if ((strlen(cp) < 2) || (*cp != 'X')) {
411 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) {
425 #if !defined(BOOTP_NFSROOT)
430 nfs_setup_diskless();
431 if (nfs_diskless_valid)
432 rootdevnames[0] = "nfs:";
435 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, nfs_rootconf, NULL);