mount_nfs.c revision 1.2
1 /* 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1992, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 /*static char sccsid[] = "from: @(#)mount_nfs.c 8.3 (Berkeley) 3/27/94";*/ 45 static char *rcsid = "$Id: mount_nfs.c,v 1.2 1994/06/24 12:04:53 pk Exp $"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/mount.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/stat.h> 53 #include <sys/syslog.h> 54 55 #include <rpc/rpc.h> 56 #include <rpc/pmap_clnt.h> 57 #include <rpc/pmap_prot.h> 58 59 #ifdef ISO 60 #include <netiso/iso.h> 61 #endif 62 63 #ifdef KERBEROS 64 #include <kerberosIV/des.h> 65 #include <kerberosIV/krb.h> 66 #endif 67 68 #include <nfs/rpcv2.h> 69 #include <nfs/nfsv2.h> 70 #define KERNEL 71 #include <nfs/nfs.h> 72 #undef KERNEL 73 #include <nfs/nqnfs.h> 74 75 #include <arpa/inet.h> 76 77 #include <ctype.h> 78 #include <err.h> 79 #include <errno.h> 80 #include <fcntl.h> 81 #include <netdb.h> 82 #include <signal.h> 83 #include <stdio.h> 84 #include <stdlib.h> 85 #include <strings.h> 86 #include <unistd.h> 87 88 #include "mntopts.h" 89 90 struct mntopt mopts[] = { 91 MOPT_STDOPTS, 92 MOPT_FORCE, 93 MOPT_UPDATE, 94 { NULL } 95 }; 96 97 struct nfs_args nfsdefargs = { 98 (struct sockaddr *)0, 99 sizeof (struct sockaddr_in), 100 SOCK_DGRAM, 101 0, 102 (nfsv2fh_t *)0, 103 0, 104 NFS_WSIZE, 105 NFS_RSIZE, 106 NFS_TIMEO, 107 NFS_RETRANS, 108 NFS_MAXGRPS, 109 NFS_DEFRAHEAD, 110 NQ_DEFLEASE, 111 NQ_DEADTHRESH, 112 (char *)0, 113 }; 114 115 struct nfhret { 116 u_long stat; 117 nfsv2fh_t nfh; 118 }; 119 #define DEF_RETRY 10000 120 #define BGRND 1 121 #define ISBGRND 2 122 int retrycnt = DEF_RETRY; 123 int opflags = 0; 124 125 #ifdef KERBEROS 126 char inst[INST_SZ]; 127 char realm[REALM_SZ]; 128 KTEXT_ST kt; 129 #endif 130 131 int getnfsargs __P((char *, struct nfs_args *)); 132 #ifdef ISO 133 struct iso_addr *iso_addr __P((const char *)); 134 #endif 135 void set_rpc_maxgrouplist __P((int)); 136 __dead void usage __P((void)); 137 int xdr_dir __P((XDR *, char *)); 138 int xdr_fh __P((XDR *, struct nfhret *)); 139 140 int 141 main(argc, argv) 142 int argc; 143 char *argv[]; 144 { 145 register int c; 146 register struct nfs_args *nfsargsp; 147 struct nfs_args nfsargs; 148 struct nfsd_cargs ncd; 149 int mntflags, i, nfssvc_flag, num; 150 char *name, *p, *spec; 151 int error = 0; 152 #ifdef KERBEROS 153 uid_t last_ruid; 154 #endif 155 156 #ifdef KERBEROS 157 last_ruid = -1; 158 (void)strcpy(realm, KRB_REALM); 159 #endif 160 retrycnt = DEF_RETRY; 161 162 mntflags = 0; 163 nfsargs = nfsdefargs; 164 nfsargsp = &nfsargs; 165 while ((c = getopt(argc, argv, 166 "a:bcdD:g:iKklL:Mm:o:PpqR:r:sTt:w:x:")) != EOF) 167 switch (c) { 168 case 'a': 169 num = strtol(optarg, &p, 10); 170 if (*p || num < 0) 171 errx(1, "illegal -a value -- %s", optarg); 172 nfsargsp->readahead = num; 173 nfsargsp->flags |= NFSMNT_READAHEAD; 174 break; 175 case 'b': 176 opflags |= BGRND; 177 break; 178 case 'c': 179 nfsargsp->flags |= NFSMNT_NOCONN; 180 break; 181 case 'D': 182 num = strtol(optarg, &p, 10); 183 if (*p || num <= 0) 184 errx(1, "illegal -D value -- %s", optarg); 185 nfsargsp->deadthresh = num; 186 nfsargsp->flags |= NFSMNT_DEADTHRESH; 187 break; 188 case 'd': 189 nfsargsp->flags |= NFSMNT_DUMBTIMR; 190 break; 191 #if 0 /* XXXX */ 192 case 'g': 193 num = strtol(optarg, &p, 10); 194 if (*p || num <= 0) 195 errx(1, "illegal -g value -- %s", optarg); 196 set_rpc_maxgrouplist(num); 197 nfsargsp->maxgrouplist = num; 198 nfsargsp->flags |= NFSMNT_MAXGRPS; 199 break; 200 #endif 201 case 'i': 202 nfsargsp->flags |= NFSMNT_INT; 203 break; 204 #ifdef KERBEROS 205 case 'K': 206 nfsargsp->flags |= NFSMNT_KERB; 207 break; 208 #endif 209 case 'k': 210 nfsargsp->flags |= NFSMNT_NQLOOKLEASE; 211 break; 212 case 'L': 213 num = strtol(optarg, &p, 10); 214 if (*p || num < 2) 215 errx(1, "illegal -L value -- %s", optarg); 216 nfsargsp->leaseterm = num; 217 nfsargsp->flags |= NFSMNT_LEASETERM; 218 break; 219 case 'l': 220 nfsargsp->flags |= NFSMNT_RDIRALOOK; 221 break; 222 case 'M': 223 nfsargsp->flags |= NFSMNT_MYWRITE; 224 break; 225 #ifdef KERBEROS 226 case 'm': 227 (void)strncpy(realm, optarg, REALM_SZ - 1); 228 realm[REALM_SZ - 1] = '\0'; 229 break; 230 #endif 231 case 'o': 232 getmntopts(optarg, mopts, &mntflags); 233 break; 234 case 'P': 235 nfsargsp->flags |= NFSMNT_RESVPORT; 236 break; 237 #ifdef ISO 238 case 'p': 239 nfsargsp->sotype = SOCK_SEQPACKET; 240 break; 241 #endif 242 case 'q': 243 nfsargsp->flags |= NFSMNT_NQNFS; 244 break; 245 case 'R': 246 num = strtol(optarg, &p, 10); 247 if (*p || num <= 0) 248 errx(1, "illegal -R value -- %s", optarg); 249 retrycnt = num; 250 break; 251 case 'r': 252 num = strtol(optarg, &p, 10); 253 if (*p || num <= 0) 254 errx(1, "illegal -r value -- %s", optarg); 255 nfsargsp->rsize = num; 256 nfsargsp->flags |= NFSMNT_RSIZE; 257 break; 258 case 's': 259 nfsargsp->flags |= NFSMNT_SOFT; 260 break; 261 case 'T': 262 nfsargsp->sotype = SOCK_STREAM; 263 break; 264 case 't': 265 num = strtol(optarg, &p, 10); 266 if (*p || num <= 0) 267 errx(1, "illegal -t value -- %s", optarg); 268 nfsargsp->timeo = num; 269 nfsargsp->flags |= NFSMNT_TIMEO; 270 break; 271 case 'w': 272 num = strtol(optarg, &p, 10); 273 if (*p || num <= 0) 274 errx(1, "illegal -w value -- %s", optarg); 275 nfsargsp->wsize = num; 276 nfsargsp->flags |= NFSMNT_WSIZE; 277 break; 278 case 'x': 279 num = strtol(optarg, &p, 10); 280 if (*p || num <= 0) 281 errx(1, "illegal -x value -- %s", optarg); 282 nfsargsp->retrans = num; 283 nfsargsp->flags |= NFSMNT_RETRANS; 284 break; 285 default: 286 usage(); 287 break; 288 } 289 argc -= optind; 290 argv += optind; 291 292 if (argc != 2) 293 error = 1; 294 295 spec = *argv++; 296 name = *argv; 297 298 if (!getnfsargs(spec, nfsargsp)) 299 exit(1); 300 if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) 301 err(1, "%s", name); 302 if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) { 303 if ((opflags & ISBGRND) == 0) { 304 if (i = fork()) { 305 if (i == -1) 306 err(1, "nqnfs 1"); 307 exit(0); 308 } 309 (void) setsid(); 310 (void) close(STDIN_FILENO); 311 (void) close(STDOUT_FILENO); 312 (void) close(STDERR_FILENO); 313 (void) chdir("/"); 314 } 315 openlog("mount_nfs:", LOG_PID, LOG_DAEMON); 316 nfssvc_flag = NFSSVC_MNTD; 317 ncd.ncd_dirp = name; 318 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { 319 if (errno != ENEEDAUTH) { 320 syslog(LOG_ERR, "nfssvc err %m"); 321 continue; 322 } 323 nfssvc_flag = 324 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; 325 #ifdef KERBEROS 326 /* 327 * Set up as ncd_authuid for the kerberos call. 328 * Must set ruid to ncd_authuid and reset the 329 * ticket name iff ncd_authuid is not the same 330 * as last time, so that the right ticket file 331 * is found. 332 */ 333 if (ncd.ncd_authuid != last_ruid) { 334 krb_set_tkt_string(""); 335 last_ruid = ncd.ncd_authuid; 336 } 337 setreuid(ncd.ncd_authuid, 0); 338 if (krb_mk_req(&kt, "rcmd", inst, realm, 0) == 339 KSUCCESS && 340 kt.length <= (RPCAUTH_MAXSIZ - 2 * NFSX_UNSIGNED)) { 341 ncd.ncd_authtype = RPCAUTH_NQNFS; 342 ncd.ncd_authlen = kt.length; 343 ncd.ncd_authstr = (char *)kt.dat; 344 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; 345 } 346 setreuid(0, 0); 347 #endif /* KERBEROS */ 348 } 349 } 350 exit(0); 351 } 352 353 int 354 getnfsargs(spec, nfsargsp) 355 char *spec; 356 struct nfs_args *nfsargsp; 357 { 358 register CLIENT *clp; 359 struct hostent *hp; 360 static struct sockaddr_in saddr; 361 #ifdef ISO 362 static struct sockaddr_iso isoaddr; 363 struct iso_addr *isop; 364 int isoflag = 0; 365 #endif 366 struct timeval pertry, try; 367 enum clnt_stat clnt_stat; 368 int so = RPC_ANYSOCK, i; 369 char *hostp, *delimp; 370 #ifdef KERBEROS 371 char *cp; 372 #endif 373 u_short tport; 374 static struct nfhret nfhret; 375 static char nam[MNAMELEN + 1]; 376 377 strncpy(nam, spec, MNAMELEN); 378 nam[MNAMELEN] = '\0'; 379 if ((delimp = strchr(spec, '@')) != NULL) { 380 hostp = delimp + 1; 381 } else if ((delimp = strchr(spec, ':')) != NULL) { 382 hostp = spec; 383 spec = delimp + 1; 384 } else { 385 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 386 return (0); 387 } 388 *delimp = '\0'; 389 /* 390 * DUMB!! Until the mount protocol works on iso transport, we must 391 * supply both an iso and an inet address for the host. 392 */ 393 #ifdef ISO 394 if (!strncmp(hostp, "iso=", 4)) { 395 u_short isoport; 396 397 hostp += 4; 398 isoflag++; 399 if ((delimp = strchr(hostp, '+')) == NULL) { 400 warnx("no iso+inet address"); 401 return (0); 402 } 403 *delimp = '\0'; 404 if ((isop = iso_addr(hostp)) == NULL) { 405 warnx("bad ISO address"); 406 return (0); 407 } 408 bzero((caddr_t)&isoaddr, sizeof (isoaddr)); 409 bcopy((caddr_t)isop, (caddr_t)&isoaddr.siso_addr, 410 sizeof (struct iso_addr)); 411 isoaddr.siso_len = sizeof (isoaddr); 412 isoaddr.siso_family = AF_ISO; 413 isoaddr.siso_tlen = 2; 414 isoport = htons(NFS_PORT); 415 bcopy((caddr_t)&isoport, TSEL(&isoaddr), isoaddr.siso_tlen); 416 hostp = delimp + 1; 417 } 418 #endif /* ISO */ 419 420 /* 421 * Handle an internet host address and reverse resolve it if 422 * doing Kerberos. 423 */ 424 if (isdigit(*hostp)) { 425 if ((saddr.sin_addr.s_addr = inet_addr(hostp)) == -1) { 426 warnx("bad net address %s", hostp); 427 return (0); 428 } 429 if ((nfsargsp->flags & NFSMNT_KERB)) { 430 if ((hp = gethostbyaddr((char *)&saddr.sin_addr.s_addr, 431 sizeof (u_long), AF_INET)) == (struct hostent *)0) { 432 warnx("can't reverse resolve net address"); 433 return (0); 434 } 435 bcopy(hp->h_addr, (caddr_t)&saddr.sin_addr, hp->h_length); 436 } 437 } else if ((hp = gethostbyname(hostp)) == NULL) { 438 warnx("can't get net id for host"); 439 return (0); 440 } else 441 bcopy(hp->h_addr, (caddr_t)&saddr.sin_addr, hp->h_length); 442 #ifdef KERBEROS 443 if (nfsargsp->flags & NFSMNT_KERB) { 444 strncpy(inst, hp->h_name, INST_SZ); 445 inst[INST_SZ - 1] = '\0'; 446 if (cp = strchr(inst, '.')) 447 *cp = '\0'; 448 } 449 #endif /* KERBEROS */ 450 451 nfhret.stat = EACCES; /* Mark not yet successful */ 452 while (retrycnt > 0) { 453 saddr.sin_family = AF_INET; 454 saddr.sin_port = htons(PMAPPORT); 455 if ((tport = pmap_getport(&saddr, RPCPROG_NFS, 456 NFS_VER2, IPPROTO_UDP)) == 0) { 457 if ((opflags & ISBGRND) == 0) 458 clnt_pcreateerror("NFS Portmap"); 459 } else { 460 saddr.sin_port = 0; 461 pertry.tv_sec = 10; 462 pertry.tv_usec = 0; 463 if ((clp = clntudp_create(&saddr, RPCPROG_MNT, 464 RPCMNT_VER1, pertry, &so)) == NULL) { 465 if ((opflags & ISBGRND) == 0) 466 clnt_pcreateerror("Cannot MNT PRC"); 467 } else { 468 clp->cl_auth = authunix_create_default(); 469 try.tv_sec = 10; 470 try.tv_usec = 0; 471 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 472 xdr_dir, spec, xdr_fh, &nfhret, try); 473 if (clnt_stat != RPC_SUCCESS) { 474 if ((opflags & ISBGRND) == 0) 475 warnx("%s", clnt_sperror(clp, 476 "bad MNT RPC")); 477 } else { 478 auth_destroy(clp->cl_auth); 479 clnt_destroy(clp); 480 retrycnt = 0; 481 } 482 } 483 } 484 if (--retrycnt > 0) { 485 if (opflags & BGRND) { 486 opflags &= ~BGRND; 487 if (i = fork()) { 488 if (i == -1) 489 err(1, "nqnfs 2"); 490 exit(0); 491 } 492 (void) setsid(); 493 (void) close(STDIN_FILENO); 494 (void) close(STDOUT_FILENO); 495 (void) close(STDERR_FILENO); 496 (void) chdir("/"); 497 opflags |= ISBGRND; 498 } 499 sleep(60); 500 } 501 } 502 if (nfhret.stat) { 503 if (opflags & ISBGRND) 504 exit(1); 505 warn("can't access %s", spec); 506 return (0); 507 } 508 saddr.sin_port = htons(tport); 509 #ifdef ISO 510 if (isoflag) { 511 nfsargsp->addr = (struct sockaddr *) &isoaddr; 512 nfsargsp->addrlen = sizeof (isoaddr); 513 } else 514 #endif /* ISO */ 515 { 516 nfsargsp->addr = (struct sockaddr *) &saddr; 517 nfsargsp->addrlen = sizeof (saddr); 518 } 519 nfsargsp->fh = &nfhret.nfh; 520 nfsargsp->hostname = nam; 521 return (1); 522 } 523 524 /* 525 * xdr routines for mount rpc's 526 */ 527 int 528 xdr_dir(xdrsp, dirp) 529 XDR *xdrsp; 530 char *dirp; 531 { 532 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 533 } 534 535 int 536 xdr_fh(xdrsp, np) 537 XDR *xdrsp; 538 struct nfhret *np; 539 { 540 if (!xdr_u_long(xdrsp, &(np->stat))) 541 return (0); 542 if (np->stat) 543 return (1); 544 return (xdr_opaque(xdrsp, (caddr_t)&(np->nfh), NFSX_FH)); 545 } 546 547 __dead void 548 usage() 549 { 550 (void)fprintf(stderr, "usage: mount_nfs %s\n%s\n%s\n%s\n", 551 "[-bcdiKklMPqsT] [-a maxreadahead] [-D deadthresh]", 552 "\t[-g maxgroups] [-L leaseterm] [-m realm] [-o options] [-R retrycnt]", 553 "\t[-r readsize] [-t timeout] [-w writesize] [-x retrans]", 554 "\trhost:path node"); 555 exit(1); 556 } 557
Indexes created Mon Sep 29 18:09:42 GMT 2025