getnfsargs_small.c revision 1.6
1 /* $NetBSD: getnfsargs_small.c,v 1.6 2006/12/27 12:13:55 yamt 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 1.6 2006/12/27 12:13:55 yamt 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 <ctype.h> 112 #include <err.h> 113 #include <errno.h> 114 #include <fcntl.h> 115 #include <netdb.h> 116 #include <signal.h> 117 #include <stdio.h> 118 #include <stdlib.h> 119 #include <string.h> 120 #include <unistd.h> 121 #include <util.h> 122 123 #include "mount_nfs.h" 124 125 #include "iodesc.h" 126 typedef int32_t n_long; 127 #include "rpc.h" 128 129 #define RPC_HEADER_WORDS 28 /* more than enough */ 130 #define FNAME_SIZE 512 131 132 struct nfhret { 133 long fhsize; 134 u_char nfh[NFSX_V3FHMAX]; 135 }; 136 137 /* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */ 138 static int 139 nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret) 140 { 141 size_t len; 142 struct args { 143 uint32_t len; 144 char path[FNAME_SIZE]; 145 } *args; 146 struct repl { 147 uint32_t errval; 148 u_char fh[NFSX_V3FHMAX]; 149 } *repl; 150 struct { 151 uint32_t h[RPC_HEADER_WORDS]; 152 struct args d; 153 } sdata; 154 struct { 155 uint32_t h[RPC_HEADER_WORDS]; 156 struct repl d; 157 } rdata; 158 ssize_t cc; 159 160 args = &sdata.d; 161 repl = &rdata.d; 162 163 memset(args, 0, sizeof(*args)); 164 len = strlen(path); 165 if (len > sizeof(args->path)) 166 len = sizeof(args->path); 167 args->len = htonl(len); 168 memcpy(args->path, path, len); 169 len = 4 + roundup(len, 4); 170 171 cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT, 172 args, len, repl, sizeof(*repl)); 173 if (cc == -1) { 174 /* errno was set by rpc_call */ 175 return errno; 176 } 177 if (cc < 4) 178 return EBADRPC; 179 if (repl->errval) 180 return ntohl(repl->errval); 181 nfhret->fhsize = cc; 182 memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh)); 183 return 0; 184 } 185 186 int 187 getnfsargs(char *spec, struct nfs_args *nfsargsp) 188 { 189 struct addrinfo hints, *ai_nfs; 190 int ecode; 191 int nfsvers, mntvers; 192 char *hostp, *delimp; 193 static struct nfhret nfhret; 194 static char nam[MNAMELEN + 1]; 195 struct iodesc d; 196 int nfs_port; 197 198 strlcpy(nam, spec, sizeof(nam)); 199 if ((delimp = strchr(spec, '@')) != NULL) { 200 hostp = delimp + 1; 201 } else if ((delimp = strrchr(spec, ':')) != NULL) { 202 hostp = spec; 203 spec = delimp + 1; 204 } else { 205 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 206 return 0; 207 } 208 *delimp = '\0'; 209 210 memset(&hints, 0, sizeof hints); 211 hints.ai_socktype = nfsargsp->sotype; 212 213 if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 214 warnx("can't get net id for host \"%s\": %s", hostp, 215 gai_strerror(ecode)); 216 return 0; 217 } 218 219 if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 220 nfsvers = NFS_VER3; 221 mntvers = RPCMNT_VER3; 222 } else { 223 nfsvers = NFS_VER2; 224 mntvers = RPCMNT_VER1; 225 } 226 227 d.socket = -1; 228 for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) { 229 if (d.ai == NULL) { 230 if (nfsvers == NFS_VER3 && !force3) { 231 nfsvers = NFS_VER2; 232 mntvers = RPCMNT_VER1; 233 d.ai = ai_nfs; 234 continue; 235 } 236 return 0; 237 } 238 nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers); 239 if (nfs_port == -1) 240 continue; 241 if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0) 242 break; 243 } 244 245 if (port != 0) 246 nfs_port = port; 247 set_port(d.ai->ai_addr, htons(nfs_port)); 248 249 nfsargsp->hostname = nam; 250 nfsargsp->addr = d.ai->ai_addr; 251 nfsargsp->addrlen = d.ai->ai_addrlen; 252 253 nfsargsp->fh = nfhret.nfh; 254 if (nfsvers == NFS_VER3) { 255 nfsargsp->fhsize = ntohl(*(uint32_t *)nfhret.nfh); 256 nfsargsp->fh += 4; 257 } else { 258 nfsargsp->fhsize = NFSX_V2FH; 259 nfsargsp->flags &= ~NFSMNT_NFSV3; 260 } 261 return 1; 262 } 263
Indexes created Thu Oct 02 01:09:59 GMT 2025