getnfsargs_small.c revision 1.7
1 /* $NetBSD: getnfsargs_small.c,v 1.7 2007/03/10 00:30:37 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 1.7 2007/03/10 00:30:37 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/nfsmount.h> 108 109 #include <arpa/inet.h> 110 111 #include <err.h> 112 #include <errno.h> 113 #include <fcntl.h> 114 #include <netdb.h> 115 #include <signal.h> 116 #include <stdio.h> 117 #include <stdlib.h> 118 #include <string.h> 119 #include <unistd.h> 120 #include <util.h> 121 122 #include "mount_nfs.h" 123 124 #include "iodesc.h" 125 typedef int32_t n_long; 126 #include "rpc.h" 127 128 #define RPC_HEADER_WORDS 28 /* more than enough */ 129 #define FNAME_SIZE 512 130 131 struct nfhret { 132 long fhsize; 133 u_char nfh[NFSX_V3FHMAX]; 134 }; 135 136 /* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */ 137 static int 138 nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret) 139 { 140 size_t len; 141 struct args { 142 uint32_t len; 143 char path[FNAME_SIZE]; 144 } *args; 145 struct repl { 146 uint32_t errval; 147 u_char fh[NFSX_V3FHMAX]; 148 } *repl; 149 struct { 150 uint32_t h[RPC_HEADER_WORDS]; 151 struct args d; 152 } sdata; 153 struct { 154 uint32_t h[RPC_HEADER_WORDS]; 155 struct repl d; 156 } rdata; 157 ssize_t cc; 158 159 args = &sdata.d; 160 repl = &rdata.d; 161 162 memset(args, 0, sizeof(*args)); 163 len = strlen(path); 164 if (len > sizeof(args->path)) 165 len = sizeof(args->path); 166 args->len = htonl(len); 167 memcpy(args->path, path, len); 168 len = 4 + roundup(len, 4); 169 170 cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT, 171 args, len, repl, sizeof(*repl)); 172 if (cc == -1) { 173 /* errno was set by rpc_call */ 174 return errno; 175 } 176 if (cc < 4) 177 return EBADRPC; 178 if (repl->errval) 179 return ntohl(repl->errval); 180 nfhret->fhsize = cc; 181 memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh)); 182 return 0; 183 } 184 185 int 186 getnfsargs(char *spec, struct nfs_args *nfsargsp) 187 { 188 struct addrinfo hints, *ai_nfs; 189 int ecode; 190 int nfsvers, mntvers; 191 char *hostp, *delimp; 192 static struct nfhret nfhret; 193 static char nam[MNAMELEN + 1]; 194 struct iodesc d; 195 int nfs_port; 196 197 strlcpy(nam, spec, sizeof(nam)); 198 if ((delimp = strchr(spec, '@')) != NULL) { 199 hostp = delimp + 1; 200 } else if ((delimp = strrchr(spec, ':')) != NULL) { 201 hostp = spec; 202 spec = delimp + 1; 203 } else { 204 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 205 return 0; 206 } 207 *delimp = '\0'; 208 209 memset(&hints, 0, sizeof hints); 210 hints.ai_socktype = nfsargsp->sotype; 211 212 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 213 warnx("can't get net id for host \"%s\": %s", hostp, 214 gai_strerror(ecode)); 215 return 0; 216 } 217 218 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 219 nfsvers = NFS_VER3; 220 mntvers = RPCMNT_VER3; 221 } else { 222 nfsvers = NFS_VER2; 223 mntvers = RPCMNT_VER1; 224 } 225 226 d.socket = -1; 227 for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) { 228 if (d.ai == NULL) { 229 if (nfsvers == NFS_VER3 && !force3) { 230 nfsvers = NFS_VER2; 231 mntvers = RPCMNT_VER1; 232 d.ai = ai_nfs; 233 continue; 234 } 235 return 0; 236 } 237 nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers); 238 if (nfs_port == -1) 239 continue; 240 if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0) 241 break; 242 } 243 244 if (port != 0) 245 nfs_port = port; 246 set_port(d.ai->ai_addr, htons(nfs_port)); 247 248 nfsargsp->hostname = nam; 249 nfsargsp->addr = d.ai->ai_addr; 250 nfsargsp->addrlen = d.ai->ai_addrlen; 251 252 nfsargsp->fh = nfhret.nfh; 253 if (nfsvers == NFS_VER3) { 254 nfsargsp->fhsize = ntohl(*(uint32_t *)nfhret.nfh); 255 nfsargsp->fh += 4; 256 } else { 257 nfsargsp->fhsize = NFSX_V2FH; 258 nfsargsp->flags &= ~NFSMNT_NFSV3; 259 } 260 return 1; 261 } 262
Indexes created Thu Oct 02 01:09:59 GMT 2025