getnfsargs_small.c revision 1.5
1 /* $NetBSD: getnfsargs_small.c,v 1.5 2006/07/07 17:25:01 hubertf 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 * 3. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /*- 36 * Copyright (c) 1993 John Brezak 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. The name of the author may not be used to endorse or promote products 48 * derived from this software without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 51 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 52 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 53 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 54 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 55 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 56 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 58 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 59 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 60 * POSSIBILITY OF SUCH DAMAGE. 61 */ 62 63 /* 64 * Copyright (c) 1992, 1993, 1994 65 * The Regents of the University of California. All rights reserved. 66 * 67 * This code is derived from software contributed to Berkeley by 68 * Rick Macklem at The University of Guelph. 69 * 70 * Redistribution and use in source and binary forms, with or without 71 * modification, are permitted provided that the following conditions 72 * are met: 73 * 1. Redistributions of source code must retain the above copyright 74 * notice, this list of conditions and the following disclaimer. 75 * 2. Redistributions in binary form must reproduce the above copyright 76 * notice, this list of conditions and the following disclaimer in the 77 * documentation and/or other materials provided with the distribution. 78 * 3. Neither the name of the University nor the names of its contributors 79 * may be used to endorse or promote products derived from this software 80 * without specific prior written permission. 81 * 82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 92 * SUCH DAMAGE. 93 */ 94 95 #include <sys/cdefs.h> 96 __RCSID("$NetBSD: getnfsargs_small.c,v 1.5 2006/07/07 17:25:01 hubertf Exp $"); 97 98 #include <sys/param.h> 99 #include <sys/mount.h> 100 #include <sys/socket.h> 101 #include <sys/stat.h> 102 #include <syslog.h> 103 104 #include <nfs/rpcv2.h> 105 #include <nfs/nfsproto.h> 106 #include <nfs/nfs.h> 107 #include <nfs/nqnfs.h> 108 #include <nfs/nfsmount.h> 109 110 #include <arpa/inet.h> 111 112 #include <ctype.h> 113 #include <err.h> 114 #include <errno.h> 115 #include <fcntl.h> 116 #include <netdb.h> 117 #include <signal.h> 118 #include <stdio.h> 119 #include <stdlib.h> 120 #include <string.h> 121 #include <unistd.h> 122 #include <util.h> 123 124 #include "mount_nfs.h" 125 126 #include "iodesc.h" 127 typedef int32_t n_long; 128 #include "rpc.h" 129 130 #define RPC_HEADER_WORDS 28 /* more than enough */ 131 #define FNAME_SIZE 512 132 133 struct nfhret { 134 long fhsize; 135 u_char nfh[NFSX_V3FHMAX]; 136 }; 137 138 /* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */ 139 static int 140 nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret) 141 { 142 size_t len; 143 struct args { 144 uint32_t len; 145 char path[FNAME_SIZE]; 146 } *args; 147 struct repl { 148 uint32_t errval; 149 u_char fh[NFSX_V3FHMAX]; 150 } *repl; 151 struct { 152 uint32_t h[RPC_HEADER_WORDS]; 153 struct args d; 154 } sdata; 155 struct { 156 uint32_t h[RPC_HEADER_WORDS]; 157 struct repl d; 158 } rdata; 159 ssize_t cc; 160 161 args = &sdata.d; 162 repl = &rdata.d; 163 164 memset(args, 0, sizeof(*args)); 165 len = strlen(path); 166 if (len > sizeof(args->path)) 167 len = sizeof(args->path); 168 args->len = htonl(len); 169 memcpy(args->path, path, len); 170 len = 4 + roundup(len, 4); 171 172 cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT, 173 args, len, repl, sizeof(*repl)); 174 if (cc == -1) { 175 /* errno was set by rpc_call */ 176 return errno; 177 } 178 if (cc < 4) 179 return EBADRPC; 180 if (repl->errval) 181 return ntohl(repl->errval); 182 nfhret->fhsize = cc; 183 memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh)); 184 return 0; 185 } 186 187 int 188 getnfsargs(char *spec, struct nfs_args *nfsargsp) 189 { 190 struct addrinfo hints, *ai_nfs; 191 int ecode; 192 int nfsvers, mntvers; 193 char *hostp, *delimp; 194 static struct nfhret nfhret; 195 static char nam[MNAMELEN + 1]; 196 struct iodesc d; 197 int nfs_port; 198 199 strlcpy(nam, spec, sizeof(nam)); 200 if ((delimp = strchr(spec, '@')) != NULL) { 201 hostp = delimp + 1; 202 } else if ((delimp = strrchr(spec, ':')) != NULL) { 203 hostp = spec; 204 spec = delimp + 1; 205 } else { 206 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 207 return 0; 208 } 209 *delimp = '\0'; 210 211 memset(&hints, 0, sizeof hints); 212 hints.ai_socktype = nfsargsp->sotype; 213 214 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 215 warnx("can't get net id for host \"%s\": %s", hostp, 216 gai_strerror(ecode)); 217 return 0; 218 } 219 220 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 221 nfsvers = NFS_VER3; 222 mntvers = RPCMNT_VER3; 223 } else { 224 nfsvers = NFS_VER2; 225 mntvers = RPCMNT_VER1; 226 } 227 228 d.socket = -1; 229 for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) { 230 if (d.ai == NULL) { 231 if (nfsvers == NFS_VER3 && !force3) { 232 nfsvers = NFS_VER2; 233 mntvers = RPCMNT_VER1; 234 d.ai = ai_nfs; 235 continue; 236 } 237 return 0; 238 } 239 nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers); 240 if (nfs_port == -1) 241 continue; 242 if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0) 243 break; 244 } 245 246 if (port != 0) 247 nfs_port = port; 248 set_port(d.ai->ai_addr, htons(nfs_port)); 249 250 nfsargsp->hostname = nam; 251 nfsargsp->addr = d.ai->ai_addr; 252 nfsargsp->addrlen = d.ai->ai_addrlen; 253 254 nfsargsp->fh = nfhret.nfh; 255 if (nfsvers == NFS_VER3) { 256 nfsargsp->fhsize = ntohl(*(uint32_t *)nfhret.nfh); 257 nfsargsp->fh += 4; 258 } else { 259 nfsargsp->fhsize = NFSX_V2FH; 260 nfsargsp->flags &= ~NFSMNT_NFSV3; 261 } 262 return 1; 263 } 264
Indexes created Wed Sep 24 05:09:52 GMT 2025