mount_nfs.c revision 1.10
1 /* $NetBSD: mount_nfs.c,v 1.10 1995/05/21 15:17:13 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #ifndef lint 40 static char copyright[] = 41 "@(#) Copyright (c) 1992, 1993, 1994\n\ 42 The Regents of the University of California. All rights reserved.\n"; 43 #endif /* not lint */ 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)mount_nfs.c 8.3 (Berkeley) 3/27/94"; 48 #else 49 static char rcsid[] = "$NetBSD: mount_nfs.c,v 1.10 1995/05/21 15:17:13 mycroft Exp $"; 50 #endif 51 #endif /* not lint */ 52 53 #include <sys/param.h> 54 #include <sys/mount.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/stat.h> 58 #include <syslog.h> 59 60 #include <rpc/rpc.h> 61 #include <rpc/pmap_clnt.h> 62 #include <rpc/pmap_prot.h> 63 64 #ifdef ISO 65 #include <netiso/iso.h> 66 #endif 67 68 #ifdef KERBEROS 69 #include <kerberosIV/des.h> 70 #include <kerberosIV/krb.h> 71 #endif 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsv2.h> 75 #define _KERNEL 76 #include <nfs/nfs.h> 77 #undef _KERNEL 78 #include <nfs/nqnfs.h> 79 80 #include <arpa/inet.h> 81 82 #include <ctype.h> 83 #include <err.h> 84 #include <errno.h> 85 #include <fcntl.h> 86 #include <netdb.h> 87 #include <signal.h> 88 #include <stdio.h> 89 #include <stdlib.h> 90 #include <strings.h> 91 #include <unistd.h> 92 93 #include "mntopts.h" 94 95 struct mntopt mopts[] = { 96 MOPT_STDOPTS, 97 MOPT_FORCE, 98 MOPT_UPDATE, 99 { NULL } 100 }; 101 102 struct nfs_args nfsdefargs = { 103 (struct sockaddr *)0, 104 sizeof (struct sockaddr_in), 105 SOCK_DGRAM, 106 0, 107 (nfsv2fh_t *)0, 108 0, 109 NFS_WSIZE, 110 NFS_RSIZE, 111 NFS_TIMEO, 112 NFS_RETRANS, 113 NFS_MAXGRPS, 114 NFS_DEFRAHEAD, 115 NQ_DEFLEASE, 116 NQ_DEADTHRESH, 117 (char *)0, 118 }; 119 120 struct nfhret { 121 u_long stat; 122 nfsv2fh_t nfh; 123 }; 124 #define DEF_RETRY 10000 125 #define BGRND 1 126 #define ISBGRND 2 127 int retrycnt = DEF_RETRY; 128 int opflags = 0; 129 130 #ifdef KERBEROS 131 char inst[INST_SZ]; 132 char realm[REALM_SZ]; 133 KTEXT_ST kt; 134 #endif 135 136 int getnfsargs __P((char *, struct nfs_args *)); 137 #ifdef ISO 138 struct iso_addr *iso_addr __P((const char *)); 139 #endif 140 void set_rpc_maxgrouplist __P((int)); 141 __dead void usage __P((void)); 142 int xdr_dir __P((XDR *, char *)); 143 int xdr_fh __P((XDR *, struct nfhret *)); 144 145 int 146 main(argc, argv) 147 int argc; 148 char *argv[]; 149 { 150 register int c; 151 register struct nfs_args *nfsargsp; 152 struct nfs_args nfsargs; 153 struct nfsd_cargs ncd; 154 int mntflags, i, nfssvc_flag, num; 155 char *name, *p, *spec; 156 int error = 0; 157 #ifdef KERBEROS 158 uid_t last_ruid; 159 #endif 160 161 #ifdef KERBEROS 162 last_ruid = -1; 163 if (krb_get_lrealm(realm, 0) != KSUCCESS) 164 (void)strcpy(realm, KRB_REALM); 165 #endif 166 retrycnt = DEF_RETRY; 167 168 mntflags = 0; 169 nfsargs = nfsdefargs; 170 nfsargsp = &nfsargs; 171 while ((c = getopt(argc, argv, 172 "a:bcdD:g:iKklL:Mm:o:PpqR:r:sTt:w:x:")) != EOF) 173 switch (c) { 174 case 'a': 175 num = strtol(optarg, &p, 10); 176 if (*p || num < 0) 177 errx(1, "illegal -a value -- %s", optarg); 178 nfsargsp->readahead = num; 179 nfsargsp->flags |= NFSMNT_READAHEAD; 180 break; 181 case 'b': 182 opflags |= BGRND; 183 break; 184 case 'c': 185 nfsargsp->flags |= NFSMNT_NOCONN; 186 break; 187 case 'D': 188 num = strtol(optarg, &p, 10); 189 if (*p || num <= 0) 190 errx(1, "illegal -D value -- %s", optarg); 191 nfsargsp->deadthresh = num; 192 nfsargsp->flags |= NFSMNT_DEADTHRESH; 193 break; 194 case 'd': 195 nfsargsp->flags |= NFSMNT_DUMBTIMR; 196 break; 197 #if 0 /* XXXX */ 198 case 'g': 199 num = strtol(optarg, &p, 10); 200 if (*p || num <= 0) 201 errx(1, "illegal -g value -- %s", optarg); 202 set_rpc_maxgrouplist(num); 203 nfsargsp->maxgrouplist = num; 204 nfsargsp->flags |= NFSMNT_MAXGRPS; 205 break; 206 #endif 207 case 'i': 208 nfsargsp->flags |= NFSMNT_INT; 209 break; 210 #ifdef KERBEROS 211 case 'K': 212 nfsargsp->flags |= NFSMNT_KERB; 213 break; 214 #endif 215 case 'k': 216 nfsargsp->flags |= NFSMNT_NQLOOKLEASE; 217 break; 218 case 'L': 219 num = strtol(optarg, &p, 10); 220 if (*p || num < 2) 221 errx(1, "illegal -L value -- %s", optarg); 222 nfsargsp->leaseterm = num; 223 nfsargsp->flags |= NFSMNT_LEASETERM; 224 break; 225 case 'l': 226 nfsargsp->flags |= NFSMNT_RDIRALOOK; 227 break; 228 case 'M': 229 nfsargsp->flags |= NFSMNT_MYWRITE; 230 break; 231 #ifdef KERBEROS 232 case 'm': 233 (void)strncpy(realm, optarg, REALM_SZ - 1); 234 realm[REALM_SZ - 1] = '\0'; 235 break; 236 #endif 237 case 'o': 238 getmntopts(optarg, mopts, &mntflags); 239 break; 240 case 'P': 241 nfsargsp->flags |= NFSMNT_RESVPORT; 242 break; 243 #ifdef ISO 244 case 'p': 245 nfsargsp->sotype = SOCK_SEQPACKET; 246 break; 247 #endif 248 case 'q': 249 nfsargsp->flags |= NFSMNT_NQNFS; 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 retrycnt = num; 256 break; 257 case 'r': 258 num = strtol(optarg, &p, 10); 259 if (*p || num <= 0) 260 errx(1, "illegal -r value -- %s", optarg); 261 nfsargsp->rsize = num; 262 nfsargsp->flags |= NFSMNT_RSIZE; 263 break; 264 case 's': 265 nfsargsp->flags |= NFSMNT_SOFT; 266 break; 267 case 'T': 268 nfsargsp->sotype = SOCK_STREAM; 269 break; 270 case 't': 271 num = strtol(optarg, &p, 10); 272 if (*p || num <= 0) 273 errx(1, "illegal -t value -- %s", optarg); 274 nfsargsp->timeo = num; 275 nfsargsp->flags |= NFSMNT_TIMEO; 276 break; 277 case 'w': 278 num = strtol(optarg, &p, 10); 279 if (*p || num <= 0) 280 errx(1, "illegal -w value -- %s", optarg); 281 nfsargsp->wsize = num; 282 nfsargsp->flags |= NFSMNT_WSIZE; 283 break; 284 case 'x': 285 num = strtol(optarg, &p, 10); 286 if (*p || num <= 0) 287 errx(1, "illegal -x value -- %s", optarg); 288 nfsargsp->retrans = num; 289 nfsargsp->flags |= NFSMNT_RETRANS; 290 break; 291 default: 292 usage(); 293 break; 294 } 295 argc -= optind; 296 argv += optind; 297 298 if (argc != 2) 299 usage(); 300 301 spec = *argv++; 302 name = *argv; 303 304 if (!getnfsargs(spec, nfsargsp)) 305 exit(1); 306 if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) 307 err(1, "%s", name); 308 if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) { 309 if ((opflags & ISBGRND) == 0) { 310 if (i = fork()) { 311 if (i == -1) 312 err(1, "nqnfs 1"); 313 exit(0); 314 } 315 (void) setsid(); 316 (void) close(STDIN_FILENO); 317 (void) close(STDOUT_FILENO); 318 (void) close(STDERR_FILENO); 319 (void) chdir("/"); 320 } 321 openlog("mount_nfs:", LOG_PID, LOG_DAEMON); 322 nfssvc_flag = NFSSVC_MNTD; 323 ncd.ncd_dirp = name; 324 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { 325 if (errno != ENEEDAUTH) { 326 syslog(LOG_ERR, "nfssvc err %m"); 327 continue; 328 } 329 nfssvc_flag = 330 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; 331 #ifdef KERBEROS 332 /* 333 * Set up as ncd_authuid for the kerberos call. 334 * Must set ruid to ncd_authuid and reset the 335 * ticket name iff ncd_authuid is not the same 336 * as last time, so that the right ticket file 337 * is found. 338 */ 339 if (ncd.ncd_authuid != last_ruid) { 340 krb_set_tkt_string(""); 341 last_ruid = ncd.ncd_authuid; 342 } 343 setreuid(ncd.ncd_authuid, 0); 344 if (krb_mk_req(&kt, "rcmd", inst, realm, 0) == 345 KSUCCESS && 346 kt.length <= (RPCAUTH_MAXSIZ - 2 * NFSX_UNSIGNED)) { 347 ncd.ncd_authtype = RPCAUTH_NQNFS; 348 ncd.ncd_authlen = kt.length; 349 ncd.ncd_authstr = (char *)kt.dat; 350 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; 351 } 352 setreuid(0, 0); 353 #endif /* KERBEROS */ 354 } 355 } 356 exit(0); 357 } 358 359 int 360 getnfsargs(spec, nfsargsp) 361 char *spec; 362 struct nfs_args *nfsargsp; 363 { 364 register CLIENT *clp; 365 struct hostent *hp; 366 static struct sockaddr_in saddr; 367 #ifdef ISO 368 static struct sockaddr_iso isoaddr; 369 struct iso_addr *isop; 370 int isoflag = 0; 371 #endif 372 struct timeval pertry, try; 373 enum clnt_stat clnt_stat; 374 int so = RPC_ANYSOCK, i; 375 char *hostp, *delimp; 376 #ifdef KERBEROS 377 char *cp; 378 #endif 379 u_short tport; 380 static struct nfhret nfhret; 381 static char nam[MNAMELEN + 1]; 382 383 strncpy(nam, spec, MNAMELEN); 384 nam[MNAMELEN] = '\0'; 385 if ((delimp = strchr(spec, '@')) != NULL) { 386 hostp = delimp + 1; 387 } else if ((delimp = strchr(spec, ':')) != NULL) { 388 hostp = spec; 389 spec = delimp + 1; 390 } else { 391 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 392 return (0); 393 } 394 *delimp = '\0'; 395 /* 396 * DUMB!! Until the mount protocol works on iso transport, we must 397 * supply both an iso and an inet address for the host. 398 */ 399 #ifdef ISO 400 if (!strncmp(hostp, "iso=", 4)) { 401 u_short isoport; 402 403 hostp += 4; 404 isoflag++; 405 if ((delimp = strchr(hostp, '+')) == NULL) { 406 warnx("no iso+inet address"); 407 return (0); 408 } 409 *delimp = '\0'; 410 if ((isop = iso_addr(hostp)) == NULL) { 411 warnx("bad ISO address"); 412 return (0); 413 } 414 memset(&isoaddr, 0, sizeof (isoaddr)); 415 memcpy(&isoaddr.siso_addr, isop, sizeof (struct iso_addr)); 416 isoaddr.siso_len = sizeof (isoaddr); 417 isoaddr.siso_family = AF_ISO; 418 isoaddr.siso_tlen = 2; 419 isoport = htons(NFS_PORT); 420 memcpy(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen); 421 hostp = delimp + 1; 422 } 423 #endif /* ISO */ 424 425 /* 426 * Handle an internet host address and reverse resolve it if 427 * doing Kerberos. 428 */ 429 if (inet_aton(hostp, &saddr.sin_addr) != 0) { 430 if ((nfsargsp->flags & NFSMNT_KERB)) { 431 if ((hp = gethostbyaddr((char *)&saddr.sin_addr.s_addr, 432 sizeof (u_long), AF_INET)) == (struct hostent *)0) { 433 warnx("can't reverse resolve net address"); 434 return (0); 435 } 436 } 437 } else { 438 hp = gethostbyname(hostp); 439 if (hp == NULL) { 440 warnx("can't get net id for host"); 441 return (0); 442 } 443 memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length); 444 } 445 #ifdef KERBEROS 446 if (nfsargsp->flags & NFSMNT_KERB) { 447 strncpy(inst, hp->h_name, INST_SZ); 448 inst[INST_SZ - 1] = '\0'; 449 if (cp = strchr(inst, '.')) 450 *cp = '\0'; 451 } 452 #endif /* KERBEROS */ 453 454 nfhret.stat = EACCES; /* Mark not yet successful */ 455 while (retrycnt > 0) { 456 saddr.sin_family = AF_INET; 457 saddr.sin_port = htons(PMAPPORT); 458 if ((tport = pmap_getport(&saddr, RPCPROG_NFS, 459 NFS_VER2, nfsargsp->sotype == SOCK_STREAM ? IPPROTO_TCP : 460 IPPROTO_UDP)) == 0) { 461 if ((opflags & ISBGRND) == 0) 462 clnt_pcreateerror("NFS Portmap"); 463 } else { 464 saddr.sin_port = 0; 465 pertry.tv_sec = 10; 466 pertry.tv_usec = 0; 467 if ((clp = (nfsargsp->sotype == SOCK_STREAM ? 468 clnttcp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 469 &so, 0, 0) : 470 clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 471 pertry, &so))) == NULL) { 472 if ((opflags & ISBGRND) == 0) 473 clnt_pcreateerror("Cannot MNT PRC"); 474 } else { 475 clp->cl_auth = authunix_create_default(); 476 try.tv_sec = 10; 477 try.tv_usec = 0; 478 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 479 xdr_dir, spec, xdr_fh, &nfhret, try); 480 if (clnt_stat != RPC_SUCCESS) { 481 if ((opflags & ISBGRND) == 0) 482 warnx("%s", clnt_sperror(clp, 483 "bad MNT RPC")); 484 } else { 485 auth_destroy(clp->cl_auth); 486 clnt_destroy(clp); 487 retrycnt = 0; 488 } 489 } 490 } 491 if (--retrycnt > 0) { 492 if (opflags & BGRND) { 493 opflags &= ~BGRND; 494 if (i = fork()) { 495 if (i == -1) 496 err(1, "nqnfs 2"); 497 exit(0); 498 } 499 (void) setsid(); 500 (void) close(STDIN_FILENO); 501 (void) close(STDOUT_FILENO); 502 (void) close(STDERR_FILENO); 503 (void) chdir("/"); 504 opflags |= ISBGRND; 505 } 506 sleep(60); 507 } 508 } 509 if (nfhret.stat) { 510 if (opflags & ISBGRND) 511 exit(1); 512 errno = nfhret.stat; 513 warn("can't access %s", spec); 514 return (0); 515 } 516 saddr.sin_port = htons(tport); 517 #ifdef ISO 518 if (isoflag) { 519 nfsargsp->addr = (struct sockaddr *) &isoaddr; 520 nfsargsp->addrlen = sizeof (isoaddr); 521 } else 522 #endif /* ISO */ 523 { 524 nfsargsp->addr = (struct sockaddr *) &saddr; 525 nfsargsp->addrlen = sizeof (saddr); 526 } 527 nfsargsp->fh = &nfhret.nfh; 528 nfsargsp->hostname = nam; 529 return (1); 530 } 531 532 /* 533 * xdr routines for mount rpc's 534 */ 535 int 536 xdr_dir(xdrsp, dirp) 537 XDR *xdrsp; 538 char *dirp; 539 { 540 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 541 } 542 543 int 544 xdr_fh(xdrsp, np) 545 XDR *xdrsp; 546 struct nfhret *np; 547 { 548 if (!xdr_u_long(xdrsp, &(np->stat))) 549 return (0); 550 if (np->stat) 551 return (1); 552 return (xdr_opaque(xdrsp, (caddr_t)&(np->nfh), NFSX_FH)); 553 } 554 555 __dead void 556 usage() 557 { 558 (void)fprintf(stderr, "usage: mount_nfs %s\n%s\n%s\n%s\n", 559 "[-bcdiKklMPqsT] [-a maxreadahead] [-D deadthresh]", 560 "\t[-g maxgroups] [-L leaseterm] [-m realm] [-o options] [-R retrycnt]", 561 "\t[-r readsize] [-t timeout] [-w writesize] [-x retrans]", 562 "\trhost:path node"); 563 exit(1); 564 } 565
Indexes created Mon Sep 29 21:09:56 GMT 2025