1 1.10 christos /* $NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $ */ 2 1.1 dsl 3 1.1 dsl /*- 4 1.1 dsl * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 1.1 dsl * All rights reserved. 6 1.1 dsl * 7 1.1 dsl * This code is derived from software contributed to The NetBSD Foundation 8 1.1 dsl * by David Laight. 9 1.1 dsl * 10 1.1 dsl * Redistribution and use in source and binary forms, with or without 11 1.1 dsl * modification, are permitted provided that the following conditions 12 1.1 dsl * are met: 13 1.1 dsl * 1. Redistributions of source code must retain the above copyright 14 1.1 dsl * notice, this list of conditions and the following disclaimer. 15 1.1 dsl * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 dsl * notice, this list of conditions and the following disclaimer in the 17 1.1 dsl * documentation and/or other materials provided with the distribution. 18 1.1 dsl * 19 1.1 dsl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1 dsl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1 dsl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1 dsl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1 dsl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1 dsl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1 dsl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1 dsl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1 dsl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1 dsl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1 dsl * POSSIBILITY OF SUCH DAMAGE. 30 1.1 dsl */ 31 1.1 dsl 32 1.2 yamt /*- 33 1.2 yamt * Copyright (c) 1993 John Brezak 34 1.2 yamt * All rights reserved. 35 1.2 yamt * 36 1.2 yamt * Redistribution and use in source and binary forms, with or without 37 1.2 yamt * modification, are permitted provided that the following conditions 38 1.2 yamt * are met: 39 1.2 yamt * 1. Redistributions of source code must retain the above copyright 40 1.2 yamt * notice, this list of conditions and the following disclaimer. 41 1.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 42 1.2 yamt * notice, this list of conditions and the following disclaimer in the 43 1.2 yamt * documentation and/or other materials provided with the distribution. 44 1.2 yamt * 3. The name of the author may not be used to endorse or promote products 45 1.2 yamt * derived from this software without specific prior written permission. 46 1.2 yamt * 47 1.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 48 1.2 yamt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 49 1.2 yamt * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 50 1.2 yamt * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 51 1.2 yamt * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 52 1.2 yamt * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 53 1.2 yamt * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 1.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 55 1.2 yamt * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 56 1.2 yamt * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 57 1.2 yamt * POSSIBILITY OF SUCH DAMAGE. 58 1.2 yamt */ 59 1.2 yamt 60 1.2 yamt /* 61 1.2 yamt * Copyright (c) 1992, 1993, 1994 62 1.2 yamt * The Regents of the University of California. All rights reserved. 63 1.2 yamt * 64 1.2 yamt * This code is derived from software contributed to Berkeley by 65 1.2 yamt * Rick Macklem at The University of Guelph. 66 1.2 yamt * 67 1.2 yamt * Redistribution and use in source and binary forms, with or without 68 1.2 yamt * modification, are permitted provided that the following conditions 69 1.2 yamt * are met: 70 1.2 yamt * 1. Redistributions of source code must retain the above copyright 71 1.2 yamt * notice, this list of conditions and the following disclaimer. 72 1.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 73 1.2 yamt * notice, this list of conditions and the following disclaimer in the 74 1.2 yamt * documentation and/or other materials provided with the distribution. 75 1.2 yamt * 3. Neither the name of the University nor the names of its contributors 76 1.2 yamt * may be used to endorse or promote products derived from this software 77 1.2 yamt * without specific prior written permission. 78 1.2 yamt * 79 1.2 yamt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 80 1.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 81 1.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 82 1.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 83 1.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 84 1.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 85 1.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 86 1.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 87 1.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 88 1.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 89 1.2 yamt * SUCH DAMAGE. 90 1.2 yamt */ 91 1.2 yamt 92 1.1 dsl #include <sys/cdefs.h> 93 1.10 christos __RCSID("$NetBSD: getnfsargs_small.c,v 1.10 2013/06/29 22:56:26 christos Exp $"); 94 1.1 dsl 95 1.1 dsl #include <sys/param.h> 96 1.1 dsl #include <sys/mount.h> 97 1.1 dsl #include <sys/socket.h> 98 1.1 dsl #include <sys/stat.h> 99 1.1 dsl #include <syslog.h> 100 1.1 dsl 101 1.1 dsl #include <nfs/rpcv2.h> 102 1.1 dsl #include <nfs/nfsproto.h> 103 1.1 dsl #include <nfs/nfs.h> 104 1.1 dsl #include <nfs/nfsmount.h> 105 1.1 dsl 106 1.1 dsl #include <arpa/inet.h> 107 1.1 dsl 108 1.1 dsl #include <err.h> 109 1.1 dsl #include <errno.h> 110 1.1 dsl #include <fcntl.h> 111 1.1 dsl #include <netdb.h> 112 1.1 dsl #include <signal.h> 113 1.1 dsl #include <stdio.h> 114 1.1 dsl #include <stdlib.h> 115 1.1 dsl #include <string.h> 116 1.1 dsl #include <unistd.h> 117 1.1 dsl #include <util.h> 118 1.1 dsl 119 1.1 dsl #include "mount_nfs.h" 120 1.1 dsl 121 1.1 dsl #include "iodesc.h" 122 1.1 dsl typedef int32_t n_long; 123 1.1 dsl #include "rpc.h" 124 1.1 dsl 125 1.1 dsl #define RPC_HEADER_WORDS 28 /* more than enough */ 126 1.1 dsl #define FNAME_SIZE 512 127 1.1 dsl 128 1.1 dsl struct nfhret { 129 1.1 dsl long fhsize; 130 1.1 dsl u_char nfh[NFSX_V3FHMAX]; 131 1.1 dsl }; 132 1.1 dsl 133 1.10 christos int retrycnt = DEF_RETRY; 134 1.10 christos int opflags = 0; 135 1.10 christos int force2 = 0; 136 1.10 christos int force3 = 0; 137 1.10 christos int mnttcp_ok = 1; 138 1.10 christos int port = 0; 139 1.10 christos 140 1.1 dsl /* Ripped from src/sys/arch/i386/stand/libsa/nfs.c */ 141 1.1 dsl static int 142 1.1 dsl nfs_getrootfh(struct iodesc *d, const char *path, int mntvers, struct nfhret *nfhret) 143 1.1 dsl { 144 1.1 dsl size_t len; 145 1.1 dsl struct args { 146 1.1 dsl uint32_t len; 147 1.1 dsl char path[FNAME_SIZE]; 148 1.1 dsl } *args; 149 1.1 dsl struct repl { 150 1.1 dsl uint32_t errval; 151 1.1 dsl u_char fh[NFSX_V3FHMAX]; 152 1.1 dsl } *repl; 153 1.1 dsl struct { 154 1.1 dsl uint32_t h[RPC_HEADER_WORDS]; 155 1.1 dsl struct args d; 156 1.1 dsl } sdata; 157 1.1 dsl struct { 158 1.1 dsl uint32_t h[RPC_HEADER_WORDS]; 159 1.1 dsl struct repl d; 160 1.1 dsl } rdata; 161 1.1 dsl ssize_t cc; 162 1.1 dsl 163 1.1 dsl args = &sdata.d; 164 1.1 dsl repl = &rdata.d; 165 1.1 dsl 166 1.1 dsl memset(args, 0, sizeof(*args)); 167 1.1 dsl len = strlen(path); 168 1.1 dsl if (len > sizeof(args->path)) 169 1.1 dsl len = sizeof(args->path); 170 1.1 dsl args->len = htonl(len); 171 1.1 dsl memcpy(args->path, path, len); 172 1.1 dsl len = 4 + roundup(len, 4); 173 1.1 dsl 174 1.1 dsl cc = rpc_call(d, RPCPROG_MNT, mntvers, RPCMNT_MOUNT, 175 1.1 dsl args, len, repl, sizeof(*repl)); 176 1.1 dsl if (cc == -1) { 177 1.1 dsl /* errno was set by rpc_call */ 178 1.1 dsl return errno; 179 1.1 dsl } 180 1.1 dsl if (cc < 4) 181 1.1 dsl return EBADRPC; 182 1.1 dsl if (repl->errval) 183 1.1 dsl return ntohl(repl->errval); 184 1.1 dsl nfhret->fhsize = cc; 185 1.1 dsl memcpy(nfhret->nfh, repl->fh, sizeof(repl->fh)); 186 1.1 dsl return 0; 187 1.1 dsl } 188 1.1 dsl 189 1.1 dsl int 190 1.1 dsl getnfsargs(char *spec, struct nfs_args *nfsargsp) 191 1.1 dsl { 192 1.1 dsl struct addrinfo hints, *ai_nfs; 193 1.1 dsl int ecode; 194 1.1 dsl int nfsvers, mntvers; 195 1.1 dsl char *hostp, *delimp; 196 1.1 dsl static struct nfhret nfhret; 197 1.1 dsl static char nam[MNAMELEN + 1]; 198 1.1 dsl struct iodesc d; 199 1.1 dsl int nfs_port; 200 1.1 dsl 201 1.5 hubertf strlcpy(nam, spec, sizeof(nam)); 202 1.1 dsl if ((delimp = strchr(spec, '@')) != NULL) { 203 1.1 dsl hostp = delimp + 1; 204 1.1 dsl } else if ((delimp = strrchr(spec, ':')) != NULL) { 205 1.1 dsl hostp = spec; 206 1.1 dsl spec = delimp + 1; 207 1.1 dsl } else { 208 1.1 dsl warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 209 1.1 dsl return 0; 210 1.1 dsl } 211 1.1 dsl *delimp = '\0'; 212 1.1 dsl 213 1.1 dsl memset(&hints, 0, sizeof hints); 214 1.1 dsl hints.ai_socktype = nfsargsp->sotype; 215 1.1 dsl 216 1.1 dsl if ((ecode = getaddrinfo(hostp, "nfs", &hints, &ai_nfs)) != 0) { 217 1.1 dsl warnx("can't get net id for host \"%s\": %s", hostp, 218 1.1 dsl gai_strerror(ecode)); 219 1.1 dsl return 0; 220 1.1 dsl } 221 1.1 dsl 222 1.4 yamt if ((nfsargsp->flags & NFSMNT_NFSV3) != 0) { 223 1.4 yamt nfsvers = NFS_VER3; 224 1.4 yamt mntvers = RPCMNT_VER3; 225 1.4 yamt } else { 226 1.1 dsl nfsvers = NFS_VER2; 227 1.1 dsl mntvers = RPCMNT_VER1; 228 1.1 dsl } 229 1.1 dsl 230 1.1 dsl d.socket = -1; 231 1.1 dsl for (d.ai = ai_nfs; ; d.ai = d.ai->ai_next) { 232 1.1 dsl if (d.ai == NULL) { 233 1.1 dsl if (nfsvers == NFS_VER3 && !force3) { 234 1.1 dsl nfsvers = NFS_VER2; 235 1.1 dsl mntvers = RPCMNT_VER1; 236 1.1 dsl d.ai = ai_nfs; 237 1.1 dsl continue; 238 1.1 dsl } 239 1.1 dsl return 0; 240 1.1 dsl } 241 1.1 dsl nfs_port = rpc_getport(&d, RPCPROG_NFS, nfsvers); 242 1.1 dsl if (nfs_port == -1) 243 1.1 dsl continue; 244 1.1 dsl if (nfs_getrootfh(&d, spec, mntvers, &nfhret) == 0) 245 1.1 dsl break; 246 1.1 dsl } 247 1.1 dsl 248 1.1 dsl if (port != 0) 249 1.1 dsl nfs_port = port; 250 1.1 dsl set_port(d.ai->ai_addr, htons(nfs_port)); 251 1.1 dsl 252 1.1 dsl nfsargsp->hostname = nam; 253 1.1 dsl nfsargsp->addr = d.ai->ai_addr; 254 1.1 dsl nfsargsp->addrlen = d.ai->ai_addrlen; 255 1.1 dsl 256 1.1 dsl nfsargsp->fh = nfhret.nfh; 257 1.1 dsl if (nfsvers == NFS_VER3) { 258 1.9 mrg nfsargsp->fhsize = be32dec(nfhret.nfh); 259 1.9 mrg nfsargsp->fh += sizeof(uint32_t); 260 1.1 dsl } else { 261 1.3 yamt nfsargsp->fhsize = NFSX_V2FH; 262 1.1 dsl nfsargsp->flags &= ~NFSMNT_NFSV3; 263 1.1 dsl } 264 1.1 dsl return 1; 265 1.1 dsl } 266