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" 122 typedef int32_t n_long; 123 #include "rpc.h" 124 125 #define RPC_HEADER_WORDS 28 /* more than enough */ 126 #define FNAME_SIZE 512 127 128 struct nfhret { 129 long fhsize; 130 u_char nfh[NFSX_V3FHMAX]; 131 }; 132 133 int retrycnt = DEF_RETRY; 134 int opflags = 0; 135 int force2 = 0; 136 int force3 = 0; 137 int mnttcp_ok = 1; 138 int port = 0; 139 140 /* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */ 141 static int 142 nfs_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 } 188 189 int 190 getnfsargs(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
Indexes created Sat Sep 20 22:09:52 GMT 2025