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 MOPT_END 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(int argc, char *argv[]) 248 { 249 int c; 250 struct nfs_args *nfsargsp; 251 struct nfs_args nfsargs; 252 int mntflags, altflags, num; 253 char *name, *p, *spec; 254 char mntpath[MAXPATHLEN]; 255 256 mntflags = 0; 257 altflags = 0; 258 nfsargs = nfsdefargs; 259 nfsargsp = &nfsargs; 260 while ((c = getopt(argc, argv, 261 "23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1) 262 switch (c) { 263 case '2': 264 mountmode = V2; 265 break; 266 case '3': 267 mountmode = V3; 268 break; 269 case 'a': 270 num = strtol(optarg, &p, 10); 271 if (*p || num < 0) 272 errx(1, "illegal -a value -- %s", optarg); 273 nfsargsp->readahead = num; 274 nfsargsp->flags |= NFSMNT_READAHEAD; 275 break; 276 case 'b': 277 opflags |= BGRND; 278 break; 279 case 'c': 280 nfsargsp->flags |= NFSMNT_NOCONN; 281 break; 282 case 'D': 283 num = strtol(optarg, &p, 10); 284 if (*p || num <= 0) 285 errx(1, "illegal -D value -- %s", optarg); 286 nfsargsp->deadthresh = num; 287 nfsargsp->flags |= NFSMNT_DEADTHRESH; 288 break; 289 case 'd': 290 nfsargsp->flags |= NFSMNT_DUMBTIMR; 291 break; 292 #if 0 /* XXXX */ 293 case 'g': 294 num = strtol(optarg, &p, 10); 295 if (*p || num <= 0) 296 errx(1, "illegal -g value -- %s", optarg); 297 set_rpc_maxgrouplist(num); 298 nfsargsp->maxgrouplist = num; 299 nfsargsp->flags |= NFSMNT_MAXGRPS; 300 break; 301 #endif 302 case 'I': 303 num = strtol(optarg, &p, 10); 304 if (*p || num <= 0) 305 errx(1, "illegal -I value -- %s", optarg); 306 nfsargsp->readdirsize = num; 307 nfsargsp->flags |= NFSMNT_READDIRSIZE; 308 break; 309 case 'i': 310 nfsargsp->flags |= NFSMNT_INT; 311 break; 312 case 'L': 313 nfsargsp->flags |= NFSMNT_NOLOCKD; 314 break; 315 case 'l': 316 nfsargsp->flags |= NFSMNT_RDIRPLUS; 317 break; 318 case 'N': 319 nfsargsp->flags &= ~NFSMNT_RESVPORT; 320 break; 321 case 'o': 322 altflags = 0; 323 set_flags(&altflags, &nfsargsp->flags, TRUE); 324 if (mountmode == V2) 325 altflags |= ALTF_NFSV2; 326 else if (mountmode == V3) 327 altflags |= ALTF_NFSV3; 328 getmntopts(optarg, mopts, &mntflags, &altflags); 329 set_flags(&altflags, &nfsargsp->flags, FALSE); 330 /* 331 * Handle altflags which don't map directly to 332 * mount flags. 333 */ 334 if (altflags & ALTF_BG) 335 opflags |= BGRND; 336 if (altflags & ALTF_NOINET4) 337 opflags |= OF_NOINET4; 338 if (altflags & ALTF_NOINET6) 339 opflags |= OF_NOINET6; 340 if (altflags & ALTF_MNTUDP) 341 mnttcp_ok = 0; 342 if (altflags & ALTF_TCP) { 343 nfsargsp->sotype = SOCK_STREAM; 344 nfsproto = IPPROTO_TCP; 345 } 346 if (altflags & ALTF_PORT) { 347 /* 348 * XXX Converting from a string to an int 349 * and back again is silly, and we should 350 * allow /etc/services names. 351 */ 352 p = strstr(optarg, "port="); 353 if (p) { 354 asprintf(&portspec, "%d", 355 atoi(p + 5)); 356 if (portspec == NULL) 357 err(1, "asprintf"); 358 } 359 } 360 mountmode = ANY; 361 if (altflags & ALTF_NFSV2) 362 mountmode = V2; 363 if (altflags & ALTF_NFSV3) 364 mountmode = V3; 365 if (altflags & ALTF_ACREGMIN) { 366 p = strstr(optarg, "acregmin="); 367 if (p) 368 nfsargsp->acregmin = atoi(p + 9); 369 } 370 if (altflags & ALTF_ACREGMAX) { 371 p = strstr(optarg, "acregmax="); 372 if (p) 373 nfsargsp->acregmax = atoi(p + 9); 374 } 375 if (altflags & ALTF_ACDIRMIN) { 376 p = strstr(optarg, "acdirmin="); 377 if (p) 378 nfsargsp->acdirmin = atoi(p + 9); 379 } 380 if (altflags & ALTF_ACDIRMAX) { 381 p = strstr(optarg, "acdirmax="); 382 if (p) 383 nfsargsp->acdirmax = atoi(p + 9); 384 } 385 break; 386 case 'P': 387 /* obsolete for NFSMNT_RESVPORT, now default */ 388 break; 389 case 'R': 390 num = strtol(optarg, &p, 10); 391 if (*p || num < 0) 392 errx(1, "illegal -R value -- %s", optarg); 393 retrycnt = num; 394 break; 395 case 'r': 396 num = strtol(optarg, &p, 10); 397 if (*p || num <= 0) 398 errx(1, "illegal -r value -- %s", optarg); 399 nfsargsp->rsize = num; 400 nfsargsp->flags |= NFSMNT_RSIZE; 401 break; 402 case 's': 403 nfsargsp->flags |= NFSMNT_SOFT; 404 break; 405 case 'T': 406 nfsargsp->sotype = SOCK_STREAM; 407 nfsproto = IPPROTO_TCP; 408 break; 409 case 't': 410 num = strtol(optarg, &p, 10); 411 if (*p || num <= 0) 412 errx(1, "illegal -t value -- %s", optarg); 413 nfsargsp->timeo = num; 414 nfsargsp->flags |= NFSMNT_TIMEO; 415 break; 416 case 'w': 417 num = strtol(optarg, &p, 10); 418 if (*p || num <= 0) 419 errx(1, "illegal -w value -- %s", optarg); 420 nfsargsp->wsize = num; 421 nfsargsp->flags |= NFSMNT_WSIZE; 422 break; 423 case 'x': 424 num = strtol(optarg, &p, 10); 425 if (*p || num <= 0) 426 errx(1, "illegal -x value -- %s", optarg); 427 nfsargsp->retrans = num; 428 nfsargsp->flags |= NFSMNT_RETRANS; 429 break; 430 case 'U': 431 mnttcp_ok = 0; 432 break; 433 default: 434 usage(); 435 break; 436 } 437 argc -= optind; 438 argv += optind; 439 440 if (argc != 2) { 441 usage(); 442 /* NOTREACHED */ 443 } 444 445 spec = *argv++; 446 name = *argv; 447 448 if (retrycnt == -1) 449 /* The default is to keep retrying forever. */ 450 retrycnt = 0; 451 if (!getnfsargs(spec, nfsargsp)) 452 exit(1); 453 454 /* resolve the mountpoint with realpath(3) */ 455 (void)checkpath(name, mntpath); 456 457 if (mount("nfs", mntpath, mntflags, nfsargsp)) 458 err(1, "%s", mntpath); 459 460 exit(0); 461 } 462 463 int 464 getnfsargs(char *spec, struct nfs_args *nfsargsp) 465 { 466 struct addrinfo hints, *ai_nfs, *ai; 467 enum tryret ret; 468 int ecode, speclen, remoteerr; 469 char *hostp, *delimp, *errstr; 470 size_t len; 471 static char nam[MNAMELEN + 1]; 472 473 if ((delimp = strrchr(spec, ':')) != NULL) { 474 hostp = spec; 475 spec = delimp + 1; 476 } else if ((delimp = strrchr(spec, '@')) != NULL) { 477 warnx("path@server syntax is deprecated, use server:path"); 478 hostp = delimp + 1; 479 } else { 480 warnx("no <host>:<dirpath> nfs-name"); 481 return (0); 482 } 483 *delimp = '\0'; 484 485 /* 486 * If there has been a trailing slash at mounttime it seems 487 * that some mountd implementations fail to remove the mount 488 * entries from their mountlist while unmounting. 489 */ 490 for (speclen = strlen(spec); 491 speclen > 1 && spec[speclen - 1] == '/'; 492 speclen--) 493 spec[speclen - 1] = '\0'; 494 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 495 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); 496 return (0); 497 } 498 /* Make both '@' and ':' notations equal */ 499 if (*hostp != '\0') { 500 len = strlen(hostp); 501 memmove(nam, hostp, len); 502 nam[len] = ':'; 503 memmove(nam + len + 1, spec, speclen); 504 nam[len + speclen + 1] = '\0'; 505 } 506 507 /* 508 * Handle an internet host address. 509 */ 510 memset(&hints, 0, sizeof hints); 511 hints.ai_flags = AI_NUMERICHOST; 512 hints.ai_socktype = nfsargsp->sotype; 513 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) { 514 hints.ai_flags = 0; 515 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) 516 != 0) { 517 if (portspec == NULL) 518 errx(1, "%s: %s", hostp, gai_strerror(ecode)); 519 else 520 errx(1, "%s:%s: %s", hostp, portspec, 521 gai_strerror(ecode)); 522 return (0); 523 } 524 } 525 526 ret = TRYRET_LOCALERR; 527 for (;;) { 528 /* 529 * Try each entry returned by getaddrinfo(). Note the 530 * occurence of remote errors by setting `remoteerr'. 531 */ 532 remoteerr = 0; 533 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { 534 if ((ai->ai_family == AF_INET6) && 535 (opflags & OF_NOINET6)) 536 continue; 537 if ((ai->ai_family == AF_INET) && 538 (opflags & OF_NOINET4)) 539 continue; 540 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr); 541 if (ret == TRYRET_SUCCESS) 542 break; 543 if (ret != TRYRET_LOCALERR) 544 remoteerr = 1; 545 if ((opflags & ISBGRND) == 0) 546 fprintf(stderr, "%s\n", errstr); 547 } 548 if (ret == TRYRET_SUCCESS) 549 break; 550 551 /* Exit if all errors were local. */ 552 if (!remoteerr) 553 exit(1); 554 555 /* 556 * If retrycnt == 0, we are to keep retrying forever. 557 * Otherwise decrement it, and exit if it hits zero. 558 */ 559 if (retrycnt != 0 && --retrycnt == 0) 560 exit(1); 561 562 if ((opflags & (BGRND | ISBGRND)) == BGRND) { 563 warnx("Cannot immediately mount %s:%s, backgrounding", 564 hostp, spec); 565 opflags |= ISBGRND; 566 if (daemon(0, 0) != 0) 567 err(1, "daemon"); 568 } 569 sleep(60); 570 } 571 freeaddrinfo(ai_nfs); 572 nfsargsp->hostname = nam; 573 /* Add mounted file system to PATH_MOUNTTAB */ 574 if (!add_mtab(hostp, spec)) 575 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); 576 return (1); 577 } 578 579 /* 580 * Try to set up the NFS arguments according to the address 581 * family, protocol (and possibly port) specified in `ai'. 582 * 583 * Returns TRYRET_SUCCESS if successful, or: 584 * TRYRET_TIMEOUT The server did not respond. 585 * TRYRET_REMOTEERR The server reported an error. 586 * TRYRET_LOCALERR Local failure. 587 * 588 * In all error cases, *errstr will be set to a statically-allocated string 589 * describing the error. 590 */ 591 enum tryret 592 nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, 593 char *spec, char **errstr) 594 { 595 static char errbuf[256]; 596 struct sockaddr_storage nfs_ss; 597 struct netbuf nfs_nb; 598 struct nfhret nfhret; 599 struct timeval try; 600 struct rpc_err rpcerr; 601 CLIENT *clp; 602 struct netconfig *nconf, *nconf_mnt; 603 char *netid, *netid_mnt; 604 int doconnect, nfsvers, mntvers; 605 enum clnt_stat stat; 606 enum mountmode trymntmode; 607 608 trymntmode = mountmode; 609 errbuf[0] = '\0'; 610 *errstr = errbuf; 611 612 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) { 613 snprintf(errbuf, sizeof errbuf, 614 "af %d sotype %d not supported", ai->ai_family, 615 nfsargsp->sotype); 616 return (TRYRET_LOCALERR); 617 } 618 if ((nconf = getnetconf_cached(netid)) == NULL) { 619 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); 620 return (TRYRET_LOCALERR); 621 } 622 /* The RPCPROG_MNT netid may be different. */ 623 if (mnttcp_ok) { 624 netid_mnt = netid; 625 nconf_mnt = nconf; 626 } else { 627 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM)) 628 == NULL) { 629 snprintf(errbuf, sizeof errbuf, 630 "af %d sotype SOCK_DGRAM not supported", 631 ai->ai_family); 632 return (TRYRET_LOCALERR); 633 } 634 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) { 635 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt, 636 nc_sperror()); 637 return (TRYRET_LOCALERR); 638 } 639 } 640 641 tryagain: 642 if (trymntmode == V2) { 643 nfsvers = 2; 644 mntvers = 1; 645 } else { 646 nfsvers = 3; 647 mntvers = 3; 648 } 649 650 if (portspec != NULL) { 651 /* `ai' contains the complete nfsd sockaddr. */ 652 nfs_nb.buf = ai->ai_addr; 653 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; 654 } else { 655 /* Ask the remote rpcbind. */ 656 nfs_nb.buf = &nfs_ss; 657 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; 658 659 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, 660 hostp)) { 661 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && 662 trymntmode == ANY) { 663 trymntmode = V2; 664 goto tryagain; 665 } 666 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", 667 netid, hostp, spec, 668 clnt_spcreateerror("RPCPROG_NFS")); 669 return (returncode(rpc_createerr.cf_stat, 670 &rpc_createerr.cf_error)); 671 } 672 } 673 674 /* Check that the server (nfsd) responds on the port we have chosen. */ 675 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers, 676 0, 0); 677 if (clp == NULL) { 678 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 679 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); 680 return (returncode(rpc_createerr.cf_stat, 681 &rpc_createerr.cf_error)); 682 } 683 if (nfsargsp->sotype == SOCK_DGRAM && 684 !(nfsargsp->flags & NFSMNT_NOCONN)) { 685 /* 686 * Use connect(), to match what the kernel does. This 687 * catches cases where the server responds from the 688 * wrong source address. 689 */ 690 doconnect = 1; 691 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { 692 clnt_destroy(clp); 693 snprintf(errbuf, sizeof errbuf, 694 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, 695 spec); 696 return (TRYRET_LOCALERR); 697 } 698 } 699 700 try.tv_sec = 10; 701 try.tv_usec = 0; 702 stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL, 703 (xdrproc_t)xdr_void, NULL, 704 try); 705 if (stat != RPC_SUCCESS) { 706 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 707 clnt_destroy(clp); 708 trymntmode = V2; 709 goto tryagain; 710 } 711 clnt_geterr(clp, &rpcerr); 712 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 713 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); 714 clnt_destroy(clp); 715 return (returncode(stat, &rpcerr)); 716 } 717 clnt_destroy(clp); 718 719 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */ 720 try.tv_sec = 10; 721 try.tv_usec = 0; 722 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt); 723 if (clp == NULL) { 724 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 725 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); 726 return (returncode(rpc_createerr.cf_stat, 727 &rpc_createerr.cf_error)); 728 } 729 clp->cl_auth = authsys_create_default(); 730 nfhret.auth = RPCAUTH_UNIX; 731 nfhret.vers = mntvers; 732 stat = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec, 733 (xdrproc_t)xdr_fh, &nfhret, 734 try); 735 auth_destroy(clp->cl_auth); 736 if (stat != RPC_SUCCESS) { 737 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 738 clnt_destroy(clp); 739 trymntmode = V2; 740 goto tryagain; 741 } 742 clnt_geterr(clp, &rpcerr); 743 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 744 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); 745 clnt_destroy(clp); 746 return (returncode(stat, &rpcerr)); 747 } 748 clnt_destroy(clp); 749 750 if (nfhret.stat != 0) { 751 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 752 hostp, spec, strerror(nfhret.stat)); 753 return (TRYRET_REMOTEERR); 754 } 755 756 /* 757 * Store the filehandle and server address in nfsargsp, making 758 * sure to copy any locally allocated structures. 759 */ 760 nfsargsp->addrlen = nfs_nb.len; 761 nfsargsp->addr = malloc(nfsargsp->addrlen); 762 nfsargsp->fhsize = nfhret.fhsize; 763 nfsargsp->fh = malloc(nfsargsp->fhsize); 764 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL) 765 err(1, "malloc"); 766 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen); 767 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize); 768 769 if (nfsvers == 3) 770 nfsargsp->flags |= NFSMNT_NFSV3; 771 else 772 nfsargsp->flags &= ~NFSMNT_NFSV3; 773 774 return (TRYRET_SUCCESS); 775 } 776 777 778 /* 779 * Catagorise a RPC return status and error into an `enum tryret' 780 * return code. 781 */ 782 enum tryret 783 returncode(enum clnt_stat stat, struct rpc_err *rpcerr) 784 { 785 switch (stat) { 786 case RPC_TIMEDOUT: 787 return (TRYRET_TIMEOUT); 788 case RPC_PMAPFAILURE: 789 case RPC_PROGNOTREGISTERED: 790 case RPC_PROGVERSMISMATCH: 791 /* XXX, these can be local or remote. */ 792 case RPC_CANTSEND: 793 case RPC_CANTRECV: 794 return (TRYRET_REMOTEERR); 795 case RPC_SYSTEMERROR: 796 switch (rpcerr->re_errno) { 797 case ETIMEDOUT: 798 return (TRYRET_TIMEOUT); 799 case ENOMEM: 800 break; 801 default: 802 return (TRYRET_REMOTEERR); 803 } 804 /* FALLTHROUGH */ 805 default: 806 break; 807 } 808 return (TRYRET_LOCALERR); 809 } 810 811 /* 812 * Look up a netid based on an address family and socket type. 813 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. 814 * 815 * XXX there should be a library function for this. 816 */ 817 char * 818 netidbytype(int af, int sotype) 819 { 820 struct nc_protos *p; 821 822 for (p = nc_protos; p->netid != NULL; p++) { 823 if (af != p->af || sotype != p->sotype) 824 continue; 825 return (p->netid); 826 } 827 return (NULL); 828 } 829 830 /* 831 * Look up a netconfig entry based on a netid, and cache the result so 832 * that we don't need to remember to call freenetconfigent(). 833 * 834 * Otherwise it behaves just like getnetconfigent(), so nc_*error() 835 * work on failure. 836 */ 837 struct netconfig * 838 getnetconf_cached(const char *netid) 839 { 840 static struct nc_entry { 841 struct netconfig *nconf; 842 struct nc_entry *next; 843 } *head; 844 struct nc_entry *p; 845 struct netconfig *nconf; 846 847 for (p = head; p != NULL; p = p->next) 848 if (strcmp(netid, p->nconf->nc_netid) == 0) 849 return (p->nconf); 850 851 if ((nconf = getnetconfigent(netid)) == NULL) 852 return (NULL); 853 if ((p = malloc(sizeof(*p))) == NULL) 854 err(1, "malloc"); 855 p->nconf = nconf; 856 p->next = head; 857 head = p; 858 859 return (p->nconf); 860 } 861 862 /* 863 * xdr routines for mount rpc's 864 */ 865 int 866 xdr_dir(XDR *xdrsp, char *dirp) 867 { 868 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 869 } 870 871 int 872 xdr_fh(XDR *xdrsp, struct nfhret *np) 873 { 874 int i; 875 long auth, authcnt, authfnd = 0; 876 877 if (!xdr_u_long(xdrsp, &np->stat)) 878 return (0); 879 if (np->stat) 880 return (1); 881 switch (np->vers) { 882 case 1: 883 np->fhsize = NFSX_V2FH; 884 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 885 case 3: 886 if (!xdr_long(xdrsp, &np->fhsize)) 887 return (0); 888 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 889 return (0); 890 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 891 return (0); 892 if (!xdr_long(xdrsp, &authcnt)) 893 return (0); 894 for (i = 0; i < authcnt; i++) { 895 if (!xdr_long(xdrsp, &auth)) 896 return (0); 897 if (auth == np->auth) 898 authfnd++; 899 } 900 /* 901 * Some servers, such as DEC's OSF/1 return a nil authenticator 902 * list to indicate RPCAUTH_UNIX. 903 */ 904 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 905 np->stat = EAUTH; 906 return (1); 907 }; 908 return (0); 909 } 910 911 void 912 usage() 913 { 914 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 915 "usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]", 916 " [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]", 917 " [-r readsize] [-t timeout] [-w writesize] [-x retrans]", 918 " rhost:path node"); 919 exit(1); 920 } 921