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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #if 0 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1992, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95"; 42 #endif /* not lint */ 43 #endif 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/param.h> 48 #include <sys/mount.h> 49 #include <sys/socket.h> 50 #include <sys/stat.h> 51 #include <sys/syslog.h> 52 #include <sys/uio.h> 53 54 #include <rpc/rpc.h> 55 #include <rpc/pmap_clnt.h> 56 #include <rpc/pmap_prot.h> 57 58 #include <nfs/rpcv2.h> 59 #include <nfs/nfsproto.h> 60 #include <nfsclient/nfs.h> 61 #include <nfsclient/nfsargs.h> 62 63 #include <arpa/inet.h> 64 65 #include <ctype.h> 66 #include <err.h> 67 #include <errno.h> 68 #include <fcntl.h> 69 #include <netdb.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <strings.h> 74 #include <sysexits.h> 75 #include <unistd.h> 76 77 #include "mntopts.h" 78 #include "mounttab.h" 79 80 #define ALTF_BG 0x1 81 #define ALTF_NOCONN 0x2 82 #define ALTF_DUMBTIMR 0x4 83 #define ALTF_INTR 0x8 84 #define ALTF_NFSV3 0x20 85 #define ALTF_RDIRPLUS 0x40 86 #define ALTF_MNTUDP 0x80 87 #define ALTF_RESVPORT 0x100 88 #define ALTF_SEQPACKET 0x200 89 #define ALTF_SOFT 0x800 90 #define ALTF_TCP 0x1000 91 #define ALTF_PORT 0x2000 92 #define ALTF_NFSV2 0x4000 93 #define ALTF_ACREGMIN 0x8000 94 #define ALTF_ACREGMAX 0x10000 95 #define ALTF_ACDIRMIN 0x20000 96 #define ALTF_ACDIRMAX 0x40000 97 #define ALTF_NOLOCKD 0x80000 98 #define ALTF_NOINET4 0x100000 99 #define ALTF_NOINET6 0x200000 100 101 struct mntopt mopts[] = { 102 MOPT_STDOPTS, 103 MOPT_FORCE, 104 MOPT_UPDATE, 105 MOPT_ASYNC, 106 { "bg", 0, ALTF_BG, 1 }, 107 { "conn", 1, ALTF_NOCONN, 1 }, 108 { "dumbtimer", 0, ALTF_DUMBTIMR, 1 }, 109 { "intr", 0, ALTF_INTR, 1 }, 110 { "nfsv3", 0, ALTF_NFSV3, 1 }, 111 { "rdirplus", 0, ALTF_RDIRPLUS, 1 }, 112 { "mntudp", 0, ALTF_MNTUDP, 1 }, 113 { "resvport", 0, ALTF_RESVPORT, 1 }, 114 { "soft", 0, ALTF_SOFT, 1 }, 115 { "tcp", 0, ALTF_TCP, 1 }, 116 { "port=", 0, ALTF_PORT, 1 }, 117 { "nfsv2", 0, ALTF_NFSV2, 1 }, 118 { "acregmin=", 0, ALTF_ACREGMIN, 1 }, 119 { "acregmax=", 0, ALTF_ACREGMAX, 1 }, 120 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 }, 121 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 }, 122 { "lockd", 1, ALTF_NOLOCKD, 1 }, 123 { "inet4", 1, ALTF_NOINET4, 1 }, 124 { "inet6", 1, ALTF_NOINET6, 1 }, 125 MOPT_END 126 }; 127 128 struct nfs_args nfsdefargs = { 129 NFS_ARGSVERSION, 130 NULL, 131 sizeof (struct sockaddr_in), 132 SOCK_DGRAM, 133 0, 134 NULL, 135 0, 136 NFSMNT_RESVPORT, 137 NFS_WSIZE, 138 NFS_RSIZE, 139 NFS_READDIRSIZE, 140 10, 141 NFS_RETRANS, 142 NFS_MAXGRPS, 143 NFS_DEFRAHEAD, 144 0, /* was: NQ_DEFLEASE */ 145 NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */ 146 NULL, 147 /* args version 4 */ 148 NFS_MINATTRTIMO, 149 NFS_MAXATTRTIMO, 150 NFS_MINDIRATTRTIMO, 151 NFS_MAXDIRATTRTIMO, 152 }; 153 154 /* Table for af,sotype -> netid conversions. */ 155 struct nc_protos { 156 char *netid; 157 int af; 158 int sotype; 159 } nc_protos[] = { 160 {"udp", AF_INET, SOCK_DGRAM}, 161 {"tcp", AF_INET, SOCK_STREAM}, 162 {"udp6", AF_INET6, SOCK_DGRAM}, 163 {"tcp6", AF_INET6, SOCK_STREAM}, 164 {NULL, 0, 0} 165 }; 166 167 struct nfhret { 168 u_long stat; 169 long vers; 170 long auth; 171 long fhsize; 172 u_char nfh[NFSX_V3FHMAX]; 173 }; 174 #define BGRND 1 175 #define ISBGRND 2 176 #define OF_NOINET4 4 177 #define OF_NOINET6 8 178 int retrycnt = -1; 179 int opflags = 0; 180 int nfsproto = IPPROTO_UDP; 181 int mnttcp_ok = 1; 182 char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */ 183 enum mountmode { 184 ANY, 185 V2, 186 V3 187 } mountmode = ANY; 188 189 /* Return codes for nfs_tryproto. */ 190 enum tryret { 191 TRYRET_SUCCESS, 192 TRYRET_TIMEOUT, /* No response received. */ 193 TRYRET_REMOTEERR, /* Error received from remote server. */ 194 TRYRET_LOCALERR /* Local failure. */ 195 }; 196 197 int getnfsargs(char *, struct nfs_args *); 198 /* void set_rpc_maxgrouplist(int); */ 199 struct netconfig *getnetconf_cached(const char *netid); 200 char *netidbytype(int af, int sotype); 201 void usage(void) __dead2; 202 int xdr_dir(XDR *, char *); 203 int xdr_fh(XDR *, struct nfhret *); 204 enum tryret nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, 205 char *hostp, char *spec, char **errstr); 206 enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr); 207 208 /* 209 * Used to set mount flags with getmntopts. Call with dir=TRUE to 210 * initialize altflags from the current mount flags. Call with 211 * dir=FALSE to update mount flags with the new value of altflags after 212 * the call to getmntopts. 213 */ 214 static void 215 set_flags(int* altflags, int* nfsflags, int dir) 216 { 217 #define F2(af, nf) \ 218 if (dir) { \ 219 if (*nfsflags & NFSMNT_##nf) \ 220 *altflags |= ALTF_##af; \ 221 else \ 222 *altflags &= ~ALTF_##af; \ 223 } else { \ 224 if (*altflags & ALTF_##af) \ 225 *nfsflags |= NFSMNT_##nf; \ 226 else \ 227 *nfsflags &= ~NFSMNT_##nf; \ 228 } 229 #define F(f) F2(f,f) 230 231 F(NOCONN); 232 F(DUMBTIMR); 233 F2(INTR, INT); 234 F(RDIRPLUS); 235 F(RESVPORT); 236 F(SOFT); 237 F(ACREGMIN); 238 F(ACREGMAX); 239 F(ACDIRMIN); 240 F(ACDIRMAX); 241 F(NOLOCKD); 242 243 #undef F 244 #undef F2 245 } 246 247 int 248 main(int argc, char *argv[]) 249 { 250 int c; 251 struct nfs_args *nfsargsp; 252 struct nfs_args nfsargs; 253 struct iovec *iov; 254 int mntflags, altflags, num; 255 int iovlen; 256 char *name, *p, *spec, *fstype; 257 char mntpath[MAXPATHLEN], errmsg[255]; 258 259 mntflags = 0; 260 altflags = 0; 261 nfsargs = nfsdefargs; 262 nfsargsp = &nfsargs; 263 iov = NULL; 264 iovlen = 0; 265 memset(errmsg, 0, sizeof(errmsg)); 266 267 fstype = strrchr(argv[0], '_'); 268 if (fstype == NULL) 269 errx(EX_USAGE, "argv[0] must end in _fstype"); 270 271 ++fstype; 272 273 while ((c = getopt(argc, argv, 274 "23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1) 275 switch (c) { 276 case '2': 277 mountmode = V2; 278 break; 279 case '3': 280 mountmode = V3; 281 break; 282 case 'a': 283 num = strtol(optarg, &p, 10); 284 if (*p || num < 0) 285 errx(1, "illegal -a value -- %s", optarg); 286 nfsargsp->readahead = num; 287 nfsargsp->flags |= NFSMNT_READAHEAD; 288 break; 289 case 'b': 290 opflags |= BGRND; 291 break; 292 case 'c': 293 nfsargsp->flags |= NFSMNT_NOCONN; 294 break; 295 case 'D': 296 num = strtol(optarg, &p, 10); 297 if (*p || num <= 0) 298 errx(1, "illegal -D value -- %s", optarg); 299 nfsargsp->deadthresh = num; 300 nfsargsp->flags |= NFSMNT_DEADTHRESH; 301 break; 302 case 'd': 303 nfsargsp->flags |= NFSMNT_DUMBTIMR; 304 break; 305 #if 0 /* XXXX */ 306 case 'g': 307 num = strtol(optarg, &p, 10); 308 if (*p || num <= 0) 309 errx(1, "illegal -g value -- %s", optarg); 310 set_rpc_maxgrouplist(num); 311 nfsargsp->maxgrouplist = num; 312 nfsargsp->flags |= NFSMNT_MAXGRPS; 313 break; 314 #endif 315 case 'I': 316 num = strtol(optarg, &p, 10); 317 if (*p || num <= 0) 318 errx(1, "illegal -I value -- %s", optarg); 319 nfsargsp->readdirsize = num; 320 nfsargsp->flags |= NFSMNT_READDIRSIZE; 321 break; 322 case 'i': 323 nfsargsp->flags |= NFSMNT_INT; 324 break; 325 case 'L': 326 nfsargsp->flags |= NFSMNT_NOLOCKD; 327 break; 328 case 'l': 329 nfsargsp->flags |= NFSMNT_RDIRPLUS; 330 break; 331 case 'N': 332 nfsargsp->flags &= ~NFSMNT_RESVPORT; 333 break; 334 case 'o': 335 altflags = 0; 336 set_flags(&altflags, &nfsargsp->flags, TRUE); 337 if (mountmode == V2) 338 altflags |= ALTF_NFSV2; 339 else if (mountmode == V3) 340 altflags |= ALTF_NFSV3; 341 getmntopts(optarg, mopts, &mntflags, &altflags); 342 set_flags(&altflags, &nfsargsp->flags, FALSE); 343 /* 344 * Handle altflags which don't map directly to 345 * mount flags. 346 */ 347 if (altflags & ALTF_BG) 348 opflags |= BGRND; 349 if (altflags & ALTF_NOINET4) 350 opflags |= OF_NOINET4; 351 if (altflags & ALTF_NOINET6) 352 opflags |= OF_NOINET6; 353 if (altflags & ALTF_MNTUDP) 354 mnttcp_ok = 0; 355 if (altflags & ALTF_TCP) { 356 nfsargsp->sotype = SOCK_STREAM; 357 nfsproto = IPPROTO_TCP; 358 } 359 if (altflags & ALTF_PORT) { 360 /* 361 * XXX Converting from a string to an int 362 * and back again is silly, and we should 363 * allow /etc/services names. 364 */ 365 p = strstr(optarg, "port="); 366 if (p) { 367 asprintf(&portspec, "%d", 368 atoi(p + 5)); 369 if (portspec == NULL) 370 err(1, "asprintf"); 371 } 372 } 373 mountmode = ANY; 374 if (altflags & ALTF_NFSV2) 375 mountmode = V2; 376 if (altflags & ALTF_NFSV3) 377 mountmode = V3; 378 if (altflags & ALTF_ACREGMIN) { 379 p = strstr(optarg, "acregmin="); 380 if (p) 381 nfsargsp->acregmin = atoi(p + 9); 382 } 383 if (altflags & ALTF_ACREGMAX) { 384 p = strstr(optarg, "acregmax="); 385 if (p) 386 nfsargsp->acregmax = atoi(p + 9); 387 } 388 if (altflags & ALTF_ACDIRMIN) { 389 p = strstr(optarg, "acdirmin="); 390 if (p) 391 nfsargsp->acdirmin = atoi(p + 9); 392 } 393 if (altflags & ALTF_ACDIRMAX) { 394 p = strstr(optarg, "acdirmax="); 395 if (p) 396 nfsargsp->acdirmax = atoi(p + 9); 397 } 398 break; 399 case 'P': 400 /* obsolete for NFSMNT_RESVPORT, now default */ 401 break; 402 case 'R': 403 num = strtol(optarg, &p, 10); 404 if (*p || num < 0) 405 errx(1, "illegal -R value -- %s", optarg); 406 retrycnt = num; 407 break; 408 case 'r': 409 num = strtol(optarg, &p, 10); 410 if (*p || num <= 0) 411 errx(1, "illegal -r value -- %s", optarg); 412 nfsargsp->rsize = num; 413 nfsargsp->flags |= NFSMNT_RSIZE; 414 break; 415 case 's': 416 nfsargsp->flags |= NFSMNT_SOFT; 417 break; 418 case 'T': 419 nfsargsp->sotype = SOCK_STREAM; 420 nfsproto = IPPROTO_TCP; 421 break; 422 case 't': 423 num = strtol(optarg, &p, 10); 424 if (*p || num <= 0) 425 errx(1, "illegal -t value -- %s", optarg); 426 nfsargsp->timeo = num; 427 nfsargsp->flags |= NFSMNT_TIMEO; 428 break; 429 case 'w': 430 num = strtol(optarg, &p, 10); 431 if (*p || num <= 0) 432 errx(1, "illegal -w value -- %s", optarg); 433 nfsargsp->wsize = num; 434 nfsargsp->flags |= NFSMNT_WSIZE; 435 break; 436 case 'x': 437 num = strtol(optarg, &p, 10); 438 if (*p || num <= 0) 439 errx(1, "illegal -x value -- %s", optarg); 440 nfsargsp->retrans = num; 441 nfsargsp->flags |= NFSMNT_RETRANS; 442 break; 443 case 'U': 444 mnttcp_ok = 0; 445 break; 446 default: 447 usage(); 448 break; 449 } 450 argc -= optind; 451 argv += optind; 452 453 if (argc != 2) { 454 usage(); 455 /* NOTREACHED */ 456 } 457 458 spec = *argv++; 459 name = *argv; 460 461 if (retrycnt == -1) 462 /* The default is to keep retrying forever. */ 463 retrycnt = 0; 464 if (!getnfsargs(spec, nfsargsp)) 465 exit(1); 466 467 /* resolve the mountpoint with realpath(3) */ 468 (void)checkpath(name, mntpath); 469 470 build_iovec(&iov, &iovlen, "nfs_args", nfsargsp, sizeof(*nfsargsp)); 471 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 472 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 473 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 474 475 if (nmount(iov, iovlen, mntflags)) 476 err(1, "%s, %s", mntpath, errmsg); 477 478 exit(0); 479 } 480 481 int 482 getnfsargs(char *spec, struct nfs_args *nfsargsp) 483 { 484 struct addrinfo hints, *ai_nfs, *ai; 485 enum tryret ret; 486 int ecode, speclen, remoteerr; 487 char *hostp, *delimp, *errstr; 488 size_t len; 489 static char nam[MNAMELEN + 1]; 490 491 if ((delimp = strrchr(spec, ':')) != NULL) { 492 hostp = spec; 493 spec = delimp + 1; 494 } else if ((delimp = strrchr(spec, '@')) != NULL) { 495 warnx("path@server syntax is deprecated, use server:path"); 496 hostp = delimp + 1; 497 } else { 498 warnx("no <host>:<dirpath> nfs-name"); 499 return (0); 500 } 501 *delimp = '\0'; 502 503 /* 504 * If there has been a trailing slash at mounttime it seems 505 * that some mountd implementations fail to remove the mount 506 * entries from their mountlist while unmounting. 507 */ 508 for (speclen = strlen(spec); 509 speclen > 1 && spec[speclen - 1] == '/'; 510 speclen--) 511 spec[speclen - 1] = '\0'; 512 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 513 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); 514 return (0); 515 } 516 /* Make both '@' and ':' notations equal */ 517 if (*hostp != '\0') { 518 len = strlen(hostp); 519 memmove(nam, hostp, len); 520 nam[len] = ':'; 521 memmove(nam + len + 1, spec, speclen); 522 nam[len + speclen + 1] = '\0'; 523 } 524 525 /* 526 * Handle an internet host address. 527 */ 528 memset(&hints, 0, sizeof hints); 529 hints.ai_flags = AI_NUMERICHOST; 530 hints.ai_socktype = nfsargsp->sotype; 531 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) { 532 hints.ai_flags = 0; 533 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) 534 != 0) { 535 if (portspec == NULL) 536 errx(1, "%s: %s", hostp, gai_strerror(ecode)); 537 else 538 errx(1, "%s:%s: %s", hostp, portspec, 539 gai_strerror(ecode)); 540 return (0); 541 } 542 } 543 544 ret = TRYRET_LOCALERR; 545 for (;;) { 546 /* 547 * Try each entry returned by getaddrinfo(). Note the 548 * occurence of remote errors by setting `remoteerr'. 549 */ 550 remoteerr = 0; 551 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { 552 if ((ai->ai_family == AF_INET6) && 553 (opflags & OF_NOINET6)) 554 continue; 555 if ((ai->ai_family == AF_INET) && 556 (opflags & OF_NOINET4)) 557 continue; 558 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr); 559 if (ret == TRYRET_SUCCESS) 560 break; 561 if (ret != TRYRET_LOCALERR) 562 remoteerr = 1; 563 if ((opflags & ISBGRND) == 0) 564 fprintf(stderr, "%s\n", errstr); 565 } 566 if (ret == TRYRET_SUCCESS) 567 break; 568 569 /* Exit if all errors were local. */ 570 if (!remoteerr) 571 exit(1); 572 573 /* 574 * If retrycnt == 0, we are to keep retrying forever. 575 * Otherwise decrement it, and exit if it hits zero. 576 */ 577 if (retrycnt != 0 && --retrycnt == 0) 578 exit(1); 579 580 if ((opflags & (BGRND | ISBGRND)) == BGRND) { 581 warnx("Cannot immediately mount %s:%s, backgrounding", 582 hostp, spec); 583 opflags |= ISBGRND; 584 if (daemon(0, 0) != 0) 585 err(1, "daemon"); 586 } 587 sleep(60); 588 } 589 freeaddrinfo(ai_nfs); 590 nfsargsp->hostname = nam; 591 /* Add mounted file system to PATH_MOUNTTAB */ 592 if (!add_mtab(hostp, spec)) 593 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); 594 return (1); 595 } 596 597 /* 598 * Try to set up the NFS arguments according to the address 599 * family, protocol (and possibly port) specified in `ai'. 600 * 601 * Returns TRYRET_SUCCESS if successful, or: 602 * TRYRET_TIMEOUT The server did not respond. 603 * TRYRET_REMOTEERR The server reported an error. 604 * TRYRET_LOCALERR Local failure. 605 * 606 * In all error cases, *errstr will be set to a statically-allocated string 607 * describing the error. 608 */ 609 enum tryret 610 nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, 611 char *spec, char **errstr) 612 { 613 static char errbuf[256]; 614 struct sockaddr_storage nfs_ss; 615 struct netbuf nfs_nb; 616 struct nfhret nfhret; 617 struct timeval try; 618 struct rpc_err rpcerr; 619 CLIENT *clp; 620 struct netconfig *nconf, *nconf_mnt; 621 char *netid, *netid_mnt; 622 int doconnect, nfsvers, mntvers; 623 enum clnt_stat stat; 624 enum mountmode trymntmode; 625 626 trymntmode = mountmode; 627 errbuf[0] = '\0'; 628 *errstr = errbuf; 629 630 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) { 631 snprintf(errbuf, sizeof errbuf, 632 "af %d sotype %d not supported", ai->ai_family, 633 nfsargsp->sotype); 634 return (TRYRET_LOCALERR); 635 } 636 if ((nconf = getnetconf_cached(netid)) == NULL) { 637 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); 638 return (TRYRET_LOCALERR); 639 } 640 /* The RPCPROG_MNT netid may be different. */ 641 if (mnttcp_ok) { 642 netid_mnt = netid; 643 nconf_mnt = nconf; 644 } else { 645 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM)) 646 == NULL) { 647 snprintf(errbuf, sizeof errbuf, 648 "af %d sotype SOCK_DGRAM not supported", 649 ai->ai_family); 650 return (TRYRET_LOCALERR); 651 } 652 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) { 653 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt, 654 nc_sperror()); 655 return (TRYRET_LOCALERR); 656 } 657 } 658 659 tryagain: 660 if (trymntmode == V2) { 661 nfsvers = 2; 662 mntvers = 1; 663 } else { 664 nfsvers = 3; 665 mntvers = 3; 666 } 667 668 if (portspec != NULL) { 669 /* `ai' contains the complete nfsd sockaddr. */ 670 nfs_nb.buf = ai->ai_addr; 671 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; 672 } else { 673 /* Ask the remote rpcbind. */ 674 nfs_nb.buf = &nfs_ss; 675 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; 676 677 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, 678 hostp)) { 679 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && 680 trymntmode == ANY) { 681 trymntmode = V2; 682 goto tryagain; 683 } 684 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", 685 netid, hostp, spec, 686 clnt_spcreateerror("RPCPROG_NFS")); 687 return (returncode(rpc_createerr.cf_stat, 688 &rpc_createerr.cf_error)); 689 } 690 } 691 692 /* Check that the server (nfsd) responds on the port we have chosen. */ 693 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers, 694 0, 0); 695 if (clp == NULL) { 696 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 697 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); 698 return (returncode(rpc_createerr.cf_stat, 699 &rpc_createerr.cf_error)); 700 } 701 if (nfsargsp->sotype == SOCK_DGRAM && 702 !(nfsargsp->flags & NFSMNT_NOCONN)) { 703 /* 704 * Use connect(), to match what the kernel does. This 705 * catches cases where the server responds from the 706 * wrong source address. 707 */ 708 doconnect = 1; 709 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { 710 clnt_destroy(clp); 711 snprintf(errbuf, sizeof errbuf, 712 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, 713 spec); 714 return (TRYRET_LOCALERR); 715 } 716 } 717 718 try.tv_sec = 10; 719 try.tv_usec = 0; 720 stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL, 721 (xdrproc_t)xdr_void, NULL, 722 try); 723 if (stat != RPC_SUCCESS) { 724 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 725 clnt_destroy(clp); 726 trymntmode = V2; 727 goto tryagain; 728 } 729 clnt_geterr(clp, &rpcerr); 730 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 731 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); 732 clnt_destroy(clp); 733 return (returncode(stat, &rpcerr)); 734 } 735 clnt_destroy(clp); 736 737 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */ 738 try.tv_sec = 10; 739 try.tv_usec = 0; 740 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt); 741 if (clp == NULL) { 742 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 743 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); 744 return (returncode(rpc_createerr.cf_stat, 745 &rpc_createerr.cf_error)); 746 } 747 clp->cl_auth = authsys_create_default(); 748 nfhret.auth = RPCAUTH_UNIX; 749 nfhret.vers = mntvers; 750 stat = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec, 751 (xdrproc_t)xdr_fh, &nfhret, 752 try); 753 auth_destroy(clp->cl_auth); 754 if (stat != RPC_SUCCESS) { 755 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 756 clnt_destroy(clp); 757 trymntmode = V2; 758 goto tryagain; 759 } 760 clnt_geterr(clp, &rpcerr); 761 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 762 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); 763 clnt_destroy(clp); 764 return (returncode(stat, &rpcerr)); 765 } 766 clnt_destroy(clp); 767 768 if (nfhret.stat != 0) { 769 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 770 hostp, spec, strerror(nfhret.stat)); 771 return (TRYRET_REMOTEERR); 772 } 773 774 /* 775 * Store the filehandle and server address in nfsargsp, making 776 * sure to copy any locally allocated structures. 777 */ 778 nfsargsp->addrlen = nfs_nb.len; 779 nfsargsp->addr = malloc(nfsargsp->addrlen); 780 nfsargsp->fhsize = nfhret.fhsize; 781 nfsargsp->fh = malloc(nfsargsp->fhsize); 782 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL) 783 err(1, "malloc"); 784 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen); 785 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize); 786 787 if (nfsvers == 3) 788 nfsargsp->flags |= NFSMNT_NFSV3; 789 else 790 nfsargsp->flags &= ~NFSMNT_NFSV3; 791 792 return (TRYRET_SUCCESS); 793 } 794 795 796 /* 797 * Catagorise a RPC return status and error into an `enum tryret' 798 * return code. 799 */ 800 enum tryret 801 returncode(enum clnt_stat stat, struct rpc_err *rpcerr) 802 { 803 switch (stat) { 804 case RPC_TIMEDOUT: 805 return (TRYRET_TIMEOUT); 806 case RPC_PMAPFAILURE: 807 case RPC_PROGNOTREGISTERED: 808 case RPC_PROGVERSMISMATCH: 809 /* XXX, these can be local or remote. */ 810 case RPC_CANTSEND: 811 case RPC_CANTRECV: 812 return (TRYRET_REMOTEERR); 813 case RPC_SYSTEMERROR: 814 switch (rpcerr->re_errno) { 815 case ETIMEDOUT: 816 return (TRYRET_TIMEOUT); 817 case ENOMEM: 818 break; 819 default: 820 return (TRYRET_REMOTEERR); 821 } 822 /* FALLTHROUGH */ 823 default: 824 break; 825 } 826 return (TRYRET_LOCALERR); 827 } 828 829 /* 830 * Look up a netid based on an address family and socket type. 831 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. 832 * 833 * XXX there should be a library function for this. 834 */ 835 char * 836 netidbytype(int af, int sotype) 837 { 838 struct nc_protos *p; 839 840 for (p = nc_protos; p->netid != NULL; p++) { 841 if (af != p->af || sotype != p->sotype) 842 continue; 843 return (p->netid); 844 } 845 return (NULL); 846 } 847 848 /* 849 * Look up a netconfig entry based on a netid, and cache the result so 850 * that we don't need to remember to call freenetconfigent(). 851 * 852 * Otherwise it behaves just like getnetconfigent(), so nc_*error() 853 * work on failure. 854 */ 855 struct netconfig * 856 getnetconf_cached(const char *netid) 857 { 858 static struct nc_entry { 859 struct netconfig *nconf; 860 struct nc_entry *next; 861 } *head; 862 struct nc_entry *p; 863 struct netconfig *nconf; 864 865 for (p = head; p != NULL; p = p->next) 866 if (strcmp(netid, p->nconf->nc_netid) == 0) 867 return (p->nconf); 868 869 if ((nconf = getnetconfigent(netid)) == NULL) 870 return (NULL); 871 if ((p = malloc(sizeof(*p))) == NULL) 872 err(1, "malloc"); 873 p->nconf = nconf; 874 p->next = head; 875 head = p; 876 877 return (p->nconf); 878 } 879 880 /* 881 * xdr routines for mount rpc's 882 */ 883 int 884 xdr_dir(XDR *xdrsp, char *dirp) 885 { 886 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 887 } 888 889 int 890 xdr_fh(XDR *xdrsp, struct nfhret *np) 891 { 892 int i; 893 long auth, authcnt, authfnd = 0; 894 895 if (!xdr_u_long(xdrsp, &np->stat)) 896 return (0); 897 if (np->stat) 898 return (1); 899 switch (np->vers) { 900 case 1: 901 np->fhsize = NFSX_V2FH; 902 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 903 case 3: 904 if (!xdr_long(xdrsp, &np->fhsize)) 905 return (0); 906 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 907 return (0); 908 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 909 return (0); 910 if (!xdr_long(xdrsp, &authcnt)) 911 return (0); 912 for (i = 0; i < authcnt; i++) { 913 if (!xdr_long(xdrsp, &auth)) 914 return (0); 915 if (auth == np->auth) 916 authfnd++; 917 } 918 /* 919 * Some servers, such as DEC's OSF/1 return a nil authenticator 920 * list to indicate RPCAUTH_UNIX. 921 */ 922 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 923 np->stat = EAUTH; 924 return (1); 925 }; 926 return (0); 927 } 928 929 void 930 usage() 931 { 932 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 933 "usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]", 934 " [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]", 935 " [-r readsize] [-t timeout] [-w writesize] [-x retrans]", 936 " rhost:path node"); 937 exit(1); 938 } 939