1/* $NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $ */
2
3/*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by David Laight.
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/*-
33 * Copyright (c) 1993 John Brezak
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. The name of the author may not be used to endorse or promote products
45 * derived from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
49 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
50 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
51 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
52 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
53 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
55 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
56 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
57 * POSSIBILITY OF SUCH DAMAGE.
58 */
59
60/*
61 * Copyright (c) 1992, 1993, 1994
62 * The Regents of the University of California. All rights reserved.
63 *
64 * This code is derived from software contributed to Berkeley by
65 * Rick Macklem at The University of Guelph.
66 *
67 * Redistribution and use in source and binary forms, with or without
68 * modification, are permitted provided that the following conditions
69 * are met:
70 * 1. Redistributions of source code must retain the above copyright
71 * notice, this list of conditions and the following disclaimer.
72 * 2. Redistributions in binary form must reproduce the above copyright
73 * notice, this list of conditions and the following disclaimer in the
74 * documentation and/or other materials provided with the distribution.
75 * 3. Neither the name of the University nor the names of its contributors
76 * may be used to endorse or promote products derived from this software
77 * without specific prior written permission.
78 *
79 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
80 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
81 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
82 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
83 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
84 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
85 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
86 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
87 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
88 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
89 * SUCH DAMAGE.
90 */
91
92#include <sys/cdefs.h>
93__RCSID("$NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $");
94
95#include <sys/param.h>
96#include <sys/mount.h>
97#include <sys/socket.h>
98#include <sys/stat.h>
99#include <syslog.h>
100
101#include <nfs/rpcv2.h>
102#include <nfs/nfsproto.h>
103#include <nfs/nfs.h>
104#include <nfs/nfsmount.h>
105
106#include <arpa/inet.h>
107
108#include <err.h>
109#include <errno.h>
110#include <fcntl.h>
111#include <netdb.h>
112#include <signal.h>
113#include <stdio.h>
114#include <stdlib.h>
115#include <string.h>
116#include <unistd.h>
117#include <util.h>
118
119#include "mount_nfs.h"
120
121#include "iodesc.h"
122typedef int32_t n_long;
123#include "rpc.h"
124
125#define RPC_HEADER_WORDS 28 /* more than enough */
126#define FNAME_SIZE 512
127
128struct nfhret {
129 long fhsize;
130 u_char nfh[NFSX_V3FHMAX];
131};
132
133int retrycnt = DEF_RETRY;
134int opflags = 0;
135int force2 = 0;
136int force3 = 0;
137int mnttcp_ok = 1;
138int port = 0;
139
140/* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */
141static int
142nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret)
143{
144 size_t len;
145 struct args {
146 uint32_t len;
147 char path[FNAME_SIZE];
148 } *args;
149 struct repl {
150 uint32_t errval;
151 u_char fh[NFSX_V3FHMAX];
152 } *repl;
153 struct {
154 uint32_t h[RPC_HEADER_WORDS];
155 struct args d;
156 } sdata;
157 struct {
158 uint32_t h[RPC_HEADER_WORDS];
159 struct repl d;
160 } rdata;
161 ssize_t cc;
162
163 args = &sdata.d;
164 repl = &rdata.d;
165
166 memset(args, 0, sizeof(*args));
167 len = strlen(path);
168 if (len > sizeof(args->path))
169 len = sizeof(args->path);
170 args->len = htonl(len);
171 memcpy(args->path, path, len);
172 len = 4 + roundup(len, 4);
173
174 cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT,
175 args, len, repl, sizeof(*repl));
176 if (cc == -1) {
177 /* errno was set by rpc_call */
178 return errno;
179 }
180 if (cc < 4)
181 return EBADRPC;
182 if (repl->errval)
183 return ntohl(repl->errval);
184 nfhret->fhsize = cc;
185 memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh));
186 return 0;
187}
188
189int
190getnfsargs(char *spec, struct nfs_args *nfsargsp)
191{
192 struct addrinfo hints, *ai_nfs;
193 int ecode;
194 int nfsvers, mntvers;
195 char *hostp, *delimp;
196 static struct nfhret nfhret;
197 static char nam[MNAMELEN + 1];
198 struct iodesc d;
199 int nfs_port;
200
201 strlcpy(nam, spec, sizeof(nam));
202 if ((delimp = strchr(spec, '@')) != NULL) {
203 hostp = delimp + 1;
204 } else if ((delimp = strrchr(spec, ':')) != NULL) {
205 hostp = spec;
206 spec = delimp + 1;
207 } else {
208 warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
209 return 0;
210 }
211 *delimp = '\0';
212
213 memset(&hints, 0, sizeof hints);
214 hints.ai_socktype = nfsargsp->sotype;
215
216 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) {
217 warnx("can't get net id for host \"%s\": %s", hostp,
218 gai_strerror(ecode));
219 return 0;
220 }
221
222 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) {
223 nfsvers = NFS_VER3;
224 mntvers = RPCMNT_VER3;
225 } else {
226 nfsvers = NFS_VER2;
227 mntvers = RPCMNT_VER1;
228 }
229
230 d.socket = -1;
231 for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) {
232 if (d.ai == NULL) {
233 if (nfsvers == NFS_VER3 && !force3) {
234 nfsvers = NFS_VER2;
235 mntvers = RPCMNT_VER1;
236 d.ai = ai_nfs;
237 continue;
238 }
239 return 0;
240 }
241 nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers);
242 if (nfs_port == -1)
243 continue;
244 if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0)
245 break;
246 }
247
248 if (port != 0)
249 nfs_port = port;
250 set_port(d.ai->ai_addr, htons(nfs_port));
251
252 nfsargsp->hostname = nam;
253 nfsargsp->addr = d.ai->ai_addr;
254 nfsargsp->addrlen = d.ai->ai_addrlen;
255
256 nfsargsp->fh = nfhret.nfh;
257 if (nfsvers == NFS_VER3) {
258 nfsargsp->fhsize = be32dec(nfhret.nfh);
259 nfsargsp->fh += sizeof(uint32_t);
260 } else {
261 nfsargsp->fhsize = NFSX_V2FH;
262 nfsargsp->flags &= ~NFSMNT_NFSV3;
263 }
264 return 1;
265}
266