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