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