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/linker.h> 49 #include <sys/module.h> 50 #include <sys/mount.h> 51 #include <sys/socket.h> 52 #include <sys/stat.h> 53 #include <sys/syslog.h> 54 #include <sys/uio.h> 55 56 #include <rpc/rpc.h> 57 #include <rpc/pmap_clnt.h> 58 #include <rpc/pmap_prot.h> 59 #include <rpcsvc/nfs_prot.h> 60 #include <rpcsvc/mount.h> 61 62 #include <nfsclient/nfs.h> 63 64 #include <arpa/inet.h> 65 66 #include <ctype.h> 67 #include <err.h> 68 #include <errno.h> 69 #include <fcntl.h> 70 #include <netdb.h> 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <strings.h> 75 #include <sysexits.h> 76 #include <unistd.h> 77 78 #include "mntopts.h" 79 #include "mounttab.h" 80 81 /* Table for af,sotype -> netid conversions. */ 82 struct nc_protos { 83 const char *netid; 84 int af; 85 int sotype; 86 } nc_protos[] = { 87 {"udp", AF_INET, SOCK_DGRAM}, 88 {"tcp", AF_INET, SOCK_STREAM}, 89 {"udp6", AF_INET6, SOCK_DGRAM}, 90 {"tcp6", AF_INET6, SOCK_STREAM}, 91 {NULL, 0, 0} 92 }; 93 94 struct nfhret { 95 u_long stat; 96 long vers; 97 long auth; 98 long fhsize; 99 u_char nfh[NFS3_FHSIZE]; 100 }; 101 #define BGRND 1 102 #define ISBGRND 2 103 #define OF_NOINET4 4 104 #define OF_NOINET6 8 105 int retrycnt = -1; 106 int opflags = 0; 107 int nfsproto = IPPROTO_TCP; 108 int mnttcp_ok = 1; 109 int noconn = 0; 110 char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */ 111 struct sockaddr *addr; 112 int addrlen = 0; 113 u_char *fh = NULL; 114 int fhsize = 0; 115 int secflavor = -1; 116 int got_principal = 0; 117 118 enum mountmode { 119 ANY, 120 V2, 121 V3, 122 V4 123 } mountmode = ANY; 124 125 /* Return codes for nfs_tryproto. */ 126 enum tryret { 127 TRYRET_SUCCESS, 128 TRYRET_TIMEOUT, /* No response received. */ 129 TRYRET_REMOTEERR, /* Error received from remote server. */ 130 TRYRET_LOCALERR /* Local failure. */ 131 }; 132 133 static int fallback_mount(struct iovec *iov, int iovlen, int mntflags); 134 static int sec_name_to_num(char *sec); 135 static char *sec_num_to_name(int num); 136 static int getnfsargs(char *, struct iovec **iov, int *iovlen); 137 /* void set_rpc_maxgrouplist(int); */ 138 static struct netconfig *getnetconf_cached(const char *netid); 139 static const char *netidbytype(int af, int sotype); 140 static void usage(void) __dead2; 141 static int xdr_dir(XDR *, char *); 142 static int xdr_fh(XDR *, struct nfhret *); 143 static enum tryret nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, 144 char **errstr, struct iovec **iov, int *iovlen); 145 static enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr); 146 147 int 148 main(int argc, char *argv[]) 149 { 150 int c; 151 struct iovec *iov; 152 int mntflags, num, iovlen; 153 int osversion; 154 char *name, *p, *spec, *fstype; 155 char mntpath[MAXPATHLEN], errmsg[255]; 156 char hostname[MAXHOSTNAMELEN + 1], *gssname, gssn[MAXHOSTNAMELEN + 50]; 157 158 mntflags = 0; 159 iov = NULL; 160 iovlen = 0; 161 memset(errmsg, 0, sizeof(errmsg)); 162 gssname = NULL; 163 164 fstype = strrchr(argv[0], '_'); 165 if (fstype == NULL) 166 errx(EX_USAGE, "argv[0] must end in _fstype"); 167 168 ++fstype; 169 170 while ((c = getopt(argc, argv, 171 "23a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1) 172 switch (c) { 173 case '2': 174 mountmode = V2; 175 break; 176 case '3': 177 mountmode = V3; 178 break; 179 case 'a': 180 printf("-a deprecated, use -o readahead=<value>\n"); 181 build_iovec(&iov, &iovlen, "readahead", optarg, (size_t)-1); 182 break; 183 case 'b': 184 opflags |= BGRND; 185 break; 186 case 'c': 187 printf("-c deprecated, use -o noconn\n"); 188 build_iovec(&iov, &iovlen, "noconn", NULL, 0); 189 noconn = 1; 190 break; 191 case 'D': 192 printf("-D deprecated, use -o deadthresh=<value>\n"); 193 build_iovec(&iov, &iovlen, "deadthresh", optarg, (size_t)-1); 194 break; 195 case 'd': 196 printf("-d deprecated, use -o dumbtimer"); 197 build_iovec(&iov, &iovlen, "dumbtimer", NULL, 0); 198 break; 199 case 'g': 200 printf("-g deprecated, use -o maxgroups"); 201 num = strtol(optarg, &p, 10); 202 if (*p || num <= 0) 203 errx(1, "illegal -g value -- %s", optarg); 204 //set_rpc_maxgrouplist(num); 205 build_iovec(&iov, &iovlen, "maxgroups", optarg, (size_t)-1); 206 break; 207 case 'I': 208 printf("-I deprecated, use -o readdirsize=<value>\n"); 209 build_iovec(&iov, &iovlen, "readdirsize", optarg, (size_t)-1); 210 break; 211 case 'i': 212 printf("-i deprecated, use -o intr\n"); 213 build_iovec(&iov, &iovlen, "intr", NULL, 0); 214 break; 215 case 'L': 216 printf("-L deprecated, use -o nolockd\n"); 217 build_iovec(&iov, &iovlen, "nolockd", NULL, 0); 218 break; 219 case 'l': 220 printf("-l deprecated, -o rdirplus\n"); 221 build_iovec(&iov, &iovlen, "rdirplus", NULL, 0); 222 break; 223 case 'N': 224 printf("-N deprecated, do not specify -o resvport\n"); 225 break; 226 case 'o': { 227 int pass_flag_to_nmount; 228 char *opt = optarg; 229 while (opt) { 230 char *pval = NULL; 231 char *pnextopt = NULL; 232 char *val = ""; 233 pass_flag_to_nmount = 1; 234 pnextopt = strchr(opt, ','); 235 if (pnextopt != NULL) { 236 *pnextopt = '\0'; 237 pnextopt++; 238 } 239 pval = strchr(opt, '='); 240 if (pval != NULL) { 241 *pval = '\0'; 242 val = pval + 1; 243 } 244 if (strcmp(opt, "bg") == 0) { 245 opflags |= BGRND; 246 pass_flag_to_nmount=0; 247 } else if (strcmp(opt, "fg") == 0) { 248 /* same as not specifying -o bg */ 249 pass_flag_to_nmount=0; 250 } else if (strcmp(opt, "gssname") == 0) { 251 pass_flag_to_nmount = 0; 252 gssname = val; 253 } else if (strcmp(opt, "mntudp") == 0) { 254 mnttcp_ok = 0; 255 nfsproto = IPPROTO_UDP; 256 } else if (strcmp(opt, "udp") == 0) { 257 nfsproto = IPPROTO_UDP; 258 } else if (strcmp(opt, "tcp") == 0) { 259 nfsproto = IPPROTO_TCP; 260 } else if (strcmp(opt, "noinet4") == 0) { 261 pass_flag_to_nmount=0; 262 opflags |= OF_NOINET4; 263 } else if (strcmp(opt, "noinet6") == 0) { 264 pass_flag_to_nmount=0; 265 opflags |= OF_NOINET6; 266 } else if (strcmp(opt, "noconn") == 0) { 267 noconn = 1; 268 } else if (strcmp(opt, "nfsv2") == 0) { 269 pass_flag_to_nmount=0; 270 mountmode = V2; 271 } else if (strcmp(opt, "nfsv3") == 0) { 272 mountmode = V3; 273 } else if (strcmp(opt, "nfsv4") == 0) { 274 pass_flag_to_nmount=0; 275 mountmode = V4; 276 fstype = "nfs"; 277 nfsproto = IPPROTO_TCP; 278 if (portspec == NULL) 279 portspec = "2049"; 280 } else if (strcmp(opt, "port") == 0) { 281 pass_flag_to_nmount=0; 282 asprintf(&portspec, "%d", 283 atoi(val)); 284 if (portspec == NULL) 285 err(1, "asprintf"); 286 } else if (strcmp(opt, "principal") == 0) { 287 got_principal = 1; 288 } else if (strcmp(opt, "sec") == 0) { 289 /* 290 * Don't add this option to 291 * the iovec yet - we will 292 * negotiate which sec flavor 293 * to use with the remote 294 * mountd. 295 */ 296 pass_flag_to_nmount=0; 297 secflavor = sec_name_to_num(val); 298 if (secflavor < 0) { 299 errx(1, 300 "illegal sec value -- %s", 301 val); 302 } 303 } else if (strcmp(opt, "retrycnt") == 0) { 304 pass_flag_to_nmount=0; 305 num = strtol(val, &p, 10); 306 if (*p || num < 0) 307 errx(1, "illegal retrycnt value -- %s", val); 308 retrycnt = num; 309 } else if (strcmp(opt, "maxgroups") == 0) { 310 num = strtol(val, &p, 10); 311 if (*p || num <= 0) 312 errx(1, "illegal maxgroups value -- %s", val); 313 //set_rpc_maxgrouplist(num); 314 } 315 if (pass_flag_to_nmount) 316 build_iovec(&iov, &iovlen, opt, val, 317 strlen(val) + 1); 318 opt = pnextopt; 319 } 320 } 321 break; 322 case 'P': 323 /* obsolete for -o noresvport now default */ 324 printf("-P deprecated, use -o noresvport\n"); 325 build_iovec(&iov, &iovlen, "noresvport", NULL, 0); 326 break; 327 case 'R': 328 printf("-R deprecated, use -o retrycnt=<retrycnt>\n"); 329 num = strtol(optarg, &p, 10); 330 if (*p || num < 0) 331 errx(1, "illegal -R value -- %s", optarg); 332 retrycnt = num; 333 break; 334 case 'r': 335 printf("-r deprecated, use -o rsize=<rsize>\n"); 336 build_iovec(&iov, &iovlen, "rsize", optarg, (size_t)-1); 337 break; 338 case 's': 339 printf("-s deprecated, use -o soft\n"); 340 build_iovec(&iov, &iovlen, "soft", NULL, 0); 341 break; 342 case 'T': 343 nfsproto = IPPROTO_TCP; 344 printf("-T deprecated, use -o tcp\n"); 345 break; 346 case 't': 347 printf("-t deprecated, use -o timeout=<value>\n"); 348 build_iovec(&iov, &iovlen, "timeout", optarg, (size_t)-1); 349 break; 350 case 'w': 351 printf("-w deprecated, use -o wsize=<value>\n"); 352 build_iovec(&iov, &iovlen, "wsize", optarg, (size_t)-1); 353 break; 354 case 'x': 355 printf("-x deprecated, use -o retrans=<value>\n"); 356 build_iovec(&iov, &iovlen, "retrans", optarg, (size_t)-1); 357 break; 358 case 'U': 359 printf("-U deprecated, use -o mntudp\n"); 360 mnttcp_ok = 0; 361 nfsproto = IPPROTO_UDP; 362 build_iovec(&iov, &iovlen, "mntudp", NULL, 0); 363 break; 364 default: 365 usage(); 366 break; 367 } 368 argc -= optind; 369 argv += optind; 370 371 if (argc != 2) { 372 usage(); 373 /* NOTREACHED */ 374 } 375 376 spec = *argv++; 377 name = *argv; 378 379 if (retrycnt == -1) 380 /* The default is to keep retrying forever. */ 381 retrycnt = 0; 382 383 /* 384 * If the fstye is "oldnfs", run the old NFS client unless the 385 * "nfsv4" option was specified. 386 */ 387 if (strcmp(fstype, "nfs") == 0) { 388 if (modfind("nfscl") < 0) { 389 /* Not present in kernel, try loading it */ 390 if (kldload("nfscl") < 0 || 391 modfind("nfscl") < 0) 392 errx(1, "nfscl is not available"); 393 } 394 } 395 396 /* 397 * Add the fqdn to the gssname, as required. 398 */ 399 if (gssname != NULL) { 400 if (strchr(gssname, '@') == NULL && 401 gethostname(hostname, MAXHOSTNAMELEN) == 0) { 402 snprintf(gssn, sizeof (gssn), "%s@%s", gssname, 403 hostname); 404 gssname = gssn; 405 } 406 build_iovec(&iov, &iovlen, "gssname", gssname, 407 strlen(gssname) + 1); 408 } 409 410 if (!getnfsargs(spec, &iov, &iovlen)) 411 exit(1); 412 413 /* resolve the mountpoint with realpath(3) */ 414 (void)checkpath(name, mntpath); 415 416 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 417 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 418 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 419 420 /* 421 * XXX: 422 * Backwards compatibility routines for older kernels. 423 * Remove this and fallback_mount() code when we do not need to support 424 * NFS mounts against older kernels which still need 425 * struct nfs_args to be passed in via nmount(). 426 */ 427 osversion = getosreldate(); 428 if (osversion >= 702100) { 429 if (nmount(iov, iovlen, mntflags)) 430 err(1, "%s, %s", mntpath, errmsg); 431 } else { 432 if (fallback_mount(iov, iovlen, mntflags)) 433 err(1, "%s, %s", mntpath, errmsg); 434 } 435 436 exit(0); 437 } 438 439 static int 440 findopt(struct iovec *iov, int iovlen, const char *name, 441 char **valuep, int *lenp) 442 { 443 int i; 444 445 for (i = 0; i < iovlen/2; i++, iov += 2) { 446 if (strcmp(name, iov[0].iov_base) == 0) { 447 if (valuep) 448 *valuep = iov[1].iov_base; 449 if (lenp) 450 *lenp = iov[1].iov_len; 451 return (0); 452 } 453 } 454 return (ENOENT); 455 } 456 457 static void 458 copyopt(struct iovec **newiov, int *newiovlen, 459 struct iovec *iov, int iovlen, const char *name) 460 { 461 char *value; 462 int len; 463 464 if (findopt(iov, iovlen, name, &value, &len) == 0) 465 build_iovec(newiov, newiovlen, name, value, len); 466 } 467 468 /* 469 * XXX: This function is provided for backwards 470 * compatibility with older kernels which did not support 471 * passing NFS mount options to nmount() as individual 472 * parameters. It should be eventually be removed. 473 */ 474 static int 475 fallback_mount(struct iovec *iov, int iovlen, int mntflags) 476 { 477 struct nfs_args args = { 478 .version = NFS_ARGSVERSION, 479 .addr = NULL, 480 .addrlen = sizeof (struct sockaddr_in), 481 .sotype = SOCK_STREAM, 482 .proto = 0, 483 .fh = NULL, 484 .fhsize = 0, 485 .flags = NFSMNT_RESVPORT, 486 .wsize = NFS_WSIZE, 487 .rsize = NFS_RSIZE, 488 .readdirsize = NFS_READDIRSIZE, 489 .timeo = 10, 490 .retrans = NFS_RETRANS, 491 .maxgrouplist = NFS_MAXGRPS, 492 .readahead = NFS_DEFRAHEAD, 493 .wcommitsize = 0, /* was: NQ_DEFLEASE */ 494 .deadthresh = NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */ 495 .hostname = NULL, 496 /* args version 4 */ 497 .acregmin = NFS_MINATTRTIMO, 498 .acregmax = NFS_MAXATTRTIMO, 499 .acdirmin = NFS_MINDIRATTRTIMO, 500 .acdirmax = NFS_MAXDIRATTRTIMO, 501 }; 502 int ret; 503 char *opt; 504 struct iovec *newiov; 505 int newiovlen; 506 507 if (findopt(iov, iovlen, "dumbtimer", NULL, NULL) == 0) 508 args.flags |= NFSMNT_DUMBTIMR; 509 if (findopt(iov, iovlen, "noconn", NULL, NULL) == 0) 510 args.flags |= NFSMNT_NOCONN; 511 if (findopt(iov, iovlen, "conn", NULL, NULL) == 0) 512 args.flags |= NFSMNT_NOCONN; 513 if (findopt(iov, iovlen, "nolockd", NULL, NULL) == 0) 514 args.flags |= NFSMNT_NOLOCKD; 515 if (findopt(iov, iovlen, "lockd", NULL, NULL) == 0) 516 args.flags &= ~NFSMNT_NOLOCKD; 517 if (findopt(iov, iovlen, "intr", NULL, NULL) == 0) 518 args.flags |= NFSMNT_INT; 519 if (findopt(iov, iovlen, "rdirplus", NULL, NULL) == 0) 520 args.flags |= NFSMNT_RDIRPLUS; 521 if (findopt(iov, iovlen, "resvport", NULL, NULL) == 0) 522 args.flags |= NFSMNT_RESVPORT; 523 if (findopt(iov, iovlen, "noresvport", NULL, NULL) == 0) 524 args.flags &= ~NFSMNT_RESVPORT; 525 if (findopt(iov, iovlen, "soft", NULL, NULL) == 0) 526 args.flags |= NFSMNT_SOFT; 527 if (findopt(iov, iovlen, "hard", NULL, NULL) == 0) 528 args.flags &= ~NFSMNT_SOFT; 529 if (findopt(iov, iovlen, "mntudp", NULL, NULL) == 0) 530 args.sotype = SOCK_DGRAM; 531 if (findopt(iov, iovlen, "udp", NULL, NULL) == 0) 532 args.sotype = SOCK_DGRAM; 533 if (findopt(iov, iovlen, "tcp", NULL, NULL) == 0) 534 args.sotype = SOCK_STREAM; 535 if (findopt(iov, iovlen, "nfsv3", NULL, NULL) == 0) 536 args.flags |= NFSMNT_NFSV3; 537 if (findopt(iov, iovlen, "readdirsize", &opt, NULL) == 0) { 538 if (opt == NULL) { 539 errx(1, "illegal readdirsize"); 540 } 541 ret = sscanf(opt, "%d", &args.readdirsize); 542 if (ret != 1 || args.readdirsize <= 0) { 543 errx(1, "illegal readdirsize: %s", opt); 544 } 545 args.flags |= NFSMNT_READDIRSIZE; 546 } 547 if (findopt(iov, iovlen, "readahead", &opt, NULL) == 0) { 548 if (opt == NULL) { 549 errx(1, "illegal readahead"); 550 } 551 ret = sscanf(opt, "%d", &args.readahead); 552 if (ret != 1 || args.readahead <= 0) { 553 errx(1, "illegal readahead: %s", opt); 554 } 555 args.flags |= NFSMNT_READAHEAD; 556 } 557 if (findopt(iov, iovlen, "wsize", &opt, NULL) == 0) { 558 if (opt == NULL) { 559 errx(1, "illegal wsize"); 560 } 561 ret = sscanf(opt, "%d", &args.wsize); 562 if (ret != 1 || args.wsize <= 0) { 563 errx(1, "illegal wsize: %s", opt); 564 } 565 args.flags |= NFSMNT_WSIZE; 566 } 567 if (findopt(iov, iovlen, "rsize", &opt, NULL) == 0) { 568 if (opt == NULL) { 569 errx(1, "illegal rsize"); 570 } 571 ret = sscanf(opt, "%d", &args.rsize); 572 if (ret != 1 || args.rsize <= 0) { 573 errx(1, "illegal wsize: %s", opt); 574 } 575 args.flags |= NFSMNT_RSIZE; 576 } 577 if (findopt(iov, iovlen, "retrans", &opt, NULL) == 0) { 578 if (opt == NULL) { 579 errx(1, "illegal retrans"); 580 } 581 ret = sscanf(opt, "%d", &args.retrans); 582 if (ret != 1 || args.retrans <= 0) { 583 errx(1, "illegal retrans: %s", opt); 584 } 585 args.flags |= NFSMNT_RETRANS; 586 } 587 if (findopt(iov, iovlen, "acregmin", &opt, NULL) == 0) { 588 ret = sscanf(opt, "%d", &args.acregmin); 589 if (ret != 1 || args.acregmin < 0) { 590 errx(1, "illegal acregmin: %s", opt); 591 } 592 args.flags |= NFSMNT_ACREGMIN; 593 } 594 if (findopt(iov, iovlen, "acregmax", &opt, NULL) == 0) { 595 ret = sscanf(opt, "%d", &args.acregmax); 596 if (ret != 1 || args.acregmax < 0) { 597 errx(1, "illegal acregmax: %s", opt); 598 } 599 args.flags |= NFSMNT_ACREGMAX; 600 } 601 if (findopt(iov, iovlen, "acdirmin", &opt, NULL) == 0) { 602 ret = sscanf(opt, "%d", &args.acdirmin); 603 if (ret != 1 || args.acdirmin < 0) { 604 errx(1, "illegal acdirmin: %s", opt); 605 } 606 args.flags |= NFSMNT_ACDIRMIN; 607 } 608 if (findopt(iov, iovlen, "acdirmax", &opt, NULL) == 0) { 609 ret = sscanf(opt, "%d", &args.acdirmax); 610 if (ret != 1 || args.acdirmax < 0) { 611 errx(1, "illegal acdirmax: %s", opt); 612 } 613 args.flags |= NFSMNT_ACDIRMAX; 614 } 615 if (findopt(iov, iovlen, "deadthresh", &opt, NULL) == 0) { 616 ret = sscanf(opt, "%d", &args.deadthresh); 617 if (ret != 1 || args.deadthresh <= 0) { 618 errx(1, "illegal deadthresh: %s", opt); 619 } 620 args.flags |= NFSMNT_DEADTHRESH; 621 } 622 if (findopt(iov, iovlen, "timeout", &opt, NULL) == 0) { 623 ret = sscanf(opt, "%d", &args.timeo); 624 if (ret != 1 || args.timeo <= 0) { 625 errx(1, "illegal timeout: %s", opt); 626 } 627 args.flags |= NFSMNT_TIMEO; 628 } 629 if (findopt(iov, iovlen, "maxgroups", &opt, NULL) == 0) { 630 ret = sscanf(opt, "%d", &args.maxgrouplist); 631 if (ret != 1 || args.timeo <= 0) { 632 errx(1, "illegal maxgroups: %s", opt); 633 } 634 args.flags |= NFSMNT_MAXGRPS; 635 } 636 if (findopt(iov, iovlen, "addr", &opt, 637 &args.addrlen) == 0) { 638 args.addr = (struct sockaddr *) opt; 639 } 640 if (findopt(iov, iovlen, "fh", &opt, &args.fhsize) == 0) { 641 args.fh = opt; 642 } 643 if (findopt(iov, iovlen, "hostname", &args.hostname, 644 NULL) == 0) { 645 } 646 if (args.hostname == NULL) { 647 errx(1, "Invalid hostname"); 648 } 649 650 newiov = NULL; 651 newiovlen = 0; 652 653 build_iovec(&newiov, &newiovlen, "nfs_args", &args, sizeof(args)); 654 copyopt(&newiov, &newiovlen, iov, iovlen, "fstype"); 655 copyopt(&newiov, &newiovlen, iov, iovlen, "fspath"); 656 copyopt(&newiov, &newiovlen, iov, iovlen, "errmsg"); 657 658 return nmount(newiov, newiovlen, mntflags); 659 } 660 661 static int 662 sec_name_to_num(char *sec) 663 { 664 if (!strcmp(sec, "krb5")) 665 return (RPCSEC_GSS_KRB5); 666 if (!strcmp(sec, "krb5i")) 667 return (RPCSEC_GSS_KRB5I); 668 if (!strcmp(sec, "krb5p")) 669 return (RPCSEC_GSS_KRB5P); 670 if (!strcmp(sec, "sys")) 671 return (AUTH_SYS); 672 return (-1); 673 } 674 675 static char * 676 sec_num_to_name(int flavor) 677 { 678 switch (flavor) { 679 case RPCSEC_GSS_KRB5: 680 return ("krb5"); 681 case RPCSEC_GSS_KRB5I: 682 return ("krb5i"); 683 case RPCSEC_GSS_KRB5P: 684 return ("krb5p"); 685 case AUTH_SYS: 686 return ("sys"); 687 } 688 return (NULL); 689 } 690 691 static int 692 getnfsargs(char *spec, struct iovec **iov, int *iovlen) 693 { 694 struct addrinfo hints, *ai_nfs, *ai; 695 enum tryret ret; 696 int ecode, speclen, remoteerr, offset, have_bracket = 0; 697 char *hostp, *delimp, *errstr; 698 size_t len; 699 static char nam[MNAMELEN + 1], pname[MAXHOSTNAMELEN + 5]; 700 701 if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL && 702 *(delimp + 1) == ':') { 703 hostp = spec + 1; 704 spec = delimp + 2; 705 have_bracket = 1; 706 } else if ((delimp = strrchr(spec, ':')) != NULL) { 707 hostp = spec; 708 spec = delimp + 1; 709 } else if ((delimp = strrchr(spec, '@')) != NULL) { 710 warnx("path@server syntax is deprecated, use server:path"); 711 hostp = delimp + 1; 712 } else { 713 warnx("no <host>:<dirpath> nfs-name"); 714 return (0); 715 } 716 *delimp = '\0'; 717 718 /* 719 * If there has been a trailing slash at mounttime it seems 720 * that some mountd implementations fail to remove the mount 721 * entries from their mountlist while unmounting. 722 */ 723 for (speclen = strlen(spec); 724 speclen > 1 && spec[speclen - 1] == '/'; 725 speclen--) 726 spec[speclen - 1] = '\0'; 727 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 728 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); 729 return (0); 730 } 731 /* Make both '@' and ':' notations equal */ 732 if (*hostp != '\0') { 733 len = strlen(hostp); 734 offset = 0; 735 if (have_bracket) 736 nam[offset++] = '['; 737 memmove(nam + offset, hostp, len); 738 if (have_bracket) 739 nam[len + offset++] = ']'; 740 nam[len + offset++] = ':'; 741 memmove(nam + len + offset, spec, speclen); 742 nam[len + speclen + offset] = '\0'; 743 } 744 745 /* 746 * Handle an internet host address. 747 */ 748 memset(&hints, 0, sizeof hints); 749 hints.ai_flags = AI_NUMERICHOST; 750 if (nfsproto == IPPROTO_TCP) 751 hints.ai_socktype = SOCK_STREAM; 752 else if (nfsproto == IPPROTO_UDP) 753 hints.ai_socktype = SOCK_DGRAM; 754 755 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) { 756 hints.ai_flags = AI_CANONNAME; 757 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) 758 != 0) { 759 if (portspec == NULL) 760 errx(1, "%s: %s", hostp, gai_strerror(ecode)); 761 else 762 errx(1, "%s:%s: %s", hostp, portspec, 763 gai_strerror(ecode)); 764 return (0); 765 } 766 767 /* 768 * For a Kerberized nfs mount where the "principal" 769 * argument has not been set, add it here. 770 */ 771 if (got_principal == 0 && secflavor >= 0 && 772 secflavor != AUTH_SYS && ai_nfs->ai_canonname != NULL) { 773 snprintf(pname, sizeof (pname), "nfs@%s", 774 ai_nfs->ai_canonname); 775 build_iovec(iov, iovlen, "principal", pname, 776 strlen(pname) + 1); 777 } 778 } 779 780 ret = TRYRET_LOCALERR; 781 for (;;) { 782 /* 783 * Try each entry returned by getaddrinfo(). Note the 784 * occurence of remote errors by setting `remoteerr'. 785 */ 786 remoteerr = 0; 787 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { 788 if ((ai->ai_family == AF_INET6) && 789 (opflags & OF_NOINET6)) 790 continue; 791 if ((ai->ai_family == AF_INET) && 792 (opflags & OF_NOINET4)) 793 continue; 794 ret = nfs_tryproto(ai, hostp, spec, &errstr, iov, 795 iovlen); 796 if (ret == TRYRET_SUCCESS) 797 break; 798 if (ret != TRYRET_LOCALERR) 799 remoteerr = 1; 800 if ((opflags & ISBGRND) == 0) 801 fprintf(stderr, "%s\n", errstr); 802 } 803 if (ret == TRYRET_SUCCESS) 804 break; 805 806 /* Exit if all errors were local. */ 807 if (!remoteerr) 808 exit(1); 809 810 /* 811 * If retrycnt == 0, we are to keep retrying forever. 812 * Otherwise decrement it, and exit if it hits zero. 813 */ 814 if (retrycnt != 0 && --retrycnt == 0) 815 exit(1); 816 817 if ((opflags & (BGRND | ISBGRND)) == BGRND) { 818 warnx("Cannot immediately mount %s:%s, backgrounding", 819 hostp, spec); 820 opflags |= ISBGRND; 821 if (daemon(0, 0) != 0) 822 err(1, "daemon"); 823 } 824 sleep(60); 825 } 826 freeaddrinfo(ai_nfs); 827 828 build_iovec(iov, iovlen, "hostname", nam, (size_t)-1); 829 /* Add mounted file system to PATH_MOUNTTAB */ 830 if (!add_mtab(hostp, spec)) 831 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); 832 return (1); 833 } 834 835 /* 836 * Try to set up the NFS arguments according to the address 837 * family, protocol (and possibly port) specified in `ai'. 838 * 839 * Returns TRYRET_SUCCESS if successful, or: 840 * TRYRET_TIMEOUT The server did not respond. 841 * TRYRET_REMOTEERR The server reported an error. 842 * TRYRET_LOCALERR Local failure. 843 * 844 * In all error cases, *errstr will be set to a statically-allocated string 845 * describing the error. 846 */ 847 static enum tryret 848 nfs_tryproto(struct addrinfo *ai, char *hostp, char *spec, char **errstr, 849 struct iovec **iov, int *iovlen) 850 { 851 static char errbuf[256]; 852 struct sockaddr_storage nfs_ss; 853 struct netbuf nfs_nb; 854 struct nfhret nfhret; 855 struct timeval try; 856 struct rpc_err rpcerr; 857 CLIENT *clp; 858 struct netconfig *nconf, *nconf_mnt; 859 const char *netid, *netid_mnt; 860 char *secname; 861 int doconnect, nfsvers, mntvers, sotype; 862 enum clnt_stat stat; 863 enum mountmode trymntmode; 864 865 sotype = 0; 866 trymntmode = mountmode; 867 errbuf[0] = '\0'; 868 *errstr = errbuf; 869 870 if (nfsproto == IPPROTO_TCP) 871 sotype = SOCK_STREAM; 872 else if (nfsproto == IPPROTO_UDP) 873 sotype = SOCK_DGRAM; 874 875 if ((netid = netidbytype(ai->ai_family, sotype)) == NULL) { 876 snprintf(errbuf, sizeof errbuf, 877 "af %d sotype %d not supported", ai->ai_family, sotype); 878 return (TRYRET_LOCALERR); 879 } 880 if ((nconf = getnetconf_cached(netid)) == NULL) { 881 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); 882 return (TRYRET_LOCALERR); 883 } 884 /* The RPCPROG_MNT netid may be different. */ 885 if (mnttcp_ok) { 886 netid_mnt = netid; 887 nconf_mnt = nconf; 888 } else { 889 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM)) 890 == NULL) { 891 snprintf(errbuf, sizeof errbuf, 892 "af %d sotype SOCK_DGRAM not supported", 893 ai->ai_family); 894 return (TRYRET_LOCALERR); 895 } 896 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) { 897 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt, 898 nc_sperror()); 899 return (TRYRET_LOCALERR); 900 } 901 } 902 903 tryagain: 904 if (trymntmode == V4) { 905 nfsvers = 4; 906 } else if (trymntmode == V2) { 907 nfsvers = 2; 908 mntvers = 1; 909 } else { 910 nfsvers = 3; 911 mntvers = 3; 912 } 913 914 if (portspec != NULL) { 915 /* `ai' contains the complete nfsd sockaddr. */ 916 nfs_nb.buf = ai->ai_addr; 917 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; 918 } else { 919 /* Ask the remote rpcbind. */ 920 nfs_nb.buf = &nfs_ss; 921 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; 922 923 if (!rpcb_getaddr(NFS_PROGRAM, nfsvers, nconf, &nfs_nb, 924 hostp)) { 925 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && 926 trymntmode == ANY) { 927 trymntmode = V2; 928 goto tryagain; 929 } 930 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", 931 netid, hostp, spec, 932 clnt_spcreateerror("RPCPROG_NFS")); 933 return (returncode(rpc_createerr.cf_stat, 934 &rpc_createerr.cf_error)); 935 } 936 } 937 938 /* Check that the server (nfsd) responds on the port we have chosen. */ 939 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, NFS_PROGRAM, nfsvers, 940 0, 0); 941 if (clp == NULL) { 942 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 943 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); 944 return (returncode(rpc_createerr.cf_stat, 945 &rpc_createerr.cf_error)); 946 } 947 if (sotype == SOCK_DGRAM && noconn == 0) { 948 /* 949 * Use connect(), to match what the kernel does. This 950 * catches cases where the server responds from the 951 * wrong source address. 952 */ 953 doconnect = 1; 954 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { 955 clnt_destroy(clp); 956 snprintf(errbuf, sizeof errbuf, 957 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, 958 spec); 959 return (TRYRET_LOCALERR); 960 } 961 } 962 963 try.tv_sec = 10; 964 try.tv_usec = 0; 965 stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL, 966 (xdrproc_t)xdr_void, NULL, try); 967 if (stat != RPC_SUCCESS) { 968 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 969 clnt_destroy(clp); 970 trymntmode = V2; 971 goto tryagain; 972 } 973 clnt_geterr(clp, &rpcerr); 974 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 975 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); 976 clnt_destroy(clp); 977 return (returncode(stat, &rpcerr)); 978 } 979 clnt_destroy(clp); 980 981 /* 982 * For NFSv4, there is no mount protocol. 983 */ 984 if (trymntmode == V4) { 985 /* 986 * Store the server address in nfsargsp, making 987 * sure to copy any locally allocated structures. 988 */ 989 addrlen = nfs_nb.len; 990 addr = malloc(addrlen); 991 if (addr == NULL) 992 err(1, "malloc"); 993 bcopy(nfs_nb.buf, addr, addrlen); 994 995 build_iovec(iov, iovlen, "addr", addr, addrlen); 996 secname = sec_num_to_name(secflavor); 997 if (secname != NULL) 998 build_iovec(iov, iovlen, "sec", secname, (size_t)-1); 999 build_iovec(iov, iovlen, "nfsv4", NULL, 0); 1000 build_iovec(iov, iovlen, "dirpath", spec, (size_t)-1); 1001 1002 return (TRYRET_SUCCESS); 1003 } 1004 1005 /* Send the MOUNTPROC_MNT RPC to get the root filehandle. */ 1006 try.tv_sec = 10; 1007 try.tv_usec = 0; 1008 clp = clnt_tp_create(hostp, MOUNTPROG, mntvers, nconf_mnt); 1009 if (clp == NULL) { 1010 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 1011 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); 1012 return (returncode(rpc_createerr.cf_stat, 1013 &rpc_createerr.cf_error)); 1014 } 1015 clp->cl_auth = authsys_create_default(); 1016 nfhret.auth = secflavor; 1017 nfhret.vers = mntvers; 1018 stat = clnt_call(clp, MOUNTPROC_MNT, (xdrproc_t)xdr_dir, spec, 1019 (xdrproc_t)xdr_fh, &nfhret, 1020 try); 1021 auth_destroy(clp->cl_auth); 1022 if (stat != RPC_SUCCESS) { 1023 if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 1024 clnt_destroy(clp); 1025 trymntmode = V2; 1026 goto tryagain; 1027 } 1028 clnt_geterr(clp, &rpcerr); 1029 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 1030 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); 1031 clnt_destroy(clp); 1032 return (returncode(stat, &rpcerr)); 1033 } 1034 clnt_destroy(clp); 1035 1036 if (nfhret.stat != 0) { 1037 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 1038 hostp, spec, strerror(nfhret.stat)); 1039 return (TRYRET_REMOTEERR); 1040 } 1041 1042 /* 1043 * Store the filehandle and server address in nfsargsp, making 1044 * sure to copy any locally allocated structures. 1045 */ 1046 addrlen = nfs_nb.len; 1047 addr = malloc(addrlen); 1048 fhsize = nfhret.fhsize; 1049 fh = malloc(fhsize); 1050 if (addr == NULL || fh == NULL) 1051 err(1, "malloc"); 1052 bcopy(nfs_nb.buf, addr, addrlen); 1053 bcopy(nfhret.nfh, fh, fhsize); 1054 1055 build_iovec(iov, iovlen, "addr", addr, addrlen); 1056 build_iovec(iov, iovlen, "fh", fh, fhsize); 1057 secname = sec_num_to_name(nfhret.auth); 1058 if (secname) 1059 build_iovec(iov, iovlen, "sec", secname, (size_t)-1); 1060 if (nfsvers == 3) 1061 build_iovec(iov, iovlen, "nfsv3", NULL, 0); 1062 1063 return (TRYRET_SUCCESS); 1064 } 1065 1066 /* 1067 * Catagorise a RPC return status and error into an `enum tryret' 1068 * return code. 1069 */ 1070 static enum tryret 1071 returncode(enum clnt_stat stat, struct rpc_err *rpcerr) 1072 { 1073 switch (stat) { 1074 case RPC_TIMEDOUT: 1075 return (TRYRET_TIMEOUT); 1076 case RPC_PMAPFAILURE: 1077 case RPC_PROGNOTREGISTERED: 1078 case RPC_PROGVERSMISMATCH: 1079 /* XXX, these can be local or remote. */ 1080 case RPC_CANTSEND: 1081 case RPC_CANTRECV: 1082 return (TRYRET_REMOTEERR); 1083 case RPC_SYSTEMERROR: 1084 switch (rpcerr->re_errno) { 1085 case ETIMEDOUT: 1086 return (TRYRET_TIMEOUT); 1087 case ENOMEM: 1088 break; 1089 default: 1090 return (TRYRET_REMOTEERR); 1091 } 1092 /* FALLTHROUGH */ 1093 default: 1094 break; 1095 } 1096 return (TRYRET_LOCALERR); 1097 } 1098 1099 /* 1100 * Look up a netid based on an address family and socket type. 1101 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. 1102 * 1103 * XXX there should be a library function for this. 1104 */ 1105 static const char * 1106 netidbytype(int af, int sotype) 1107 { 1108 struct nc_protos *p; 1109 1110 for (p = nc_protos; p->netid != NULL; p++) { 1111 if (af != p->af || sotype != p->sotype) 1112 continue; 1113 return (p->netid); 1114 } 1115 return (NULL); 1116 } 1117 1118 /* 1119 * Look up a netconfig entry based on a netid, and cache the result so 1120 * that we don't need to remember to call freenetconfigent(). 1121 * 1122 * Otherwise it behaves just like getnetconfigent(), so nc_*error() 1123 * work on failure. 1124 */ 1125 static struct netconfig * 1126 getnetconf_cached(const char *netid) 1127 { 1128 static struct nc_entry { 1129 struct netconfig *nconf; 1130 struct nc_entry *next; 1131 } *head; 1132 struct nc_entry *p; 1133 struct netconfig *nconf; 1134 1135 for (p = head; p != NULL; p = p->next) 1136 if (strcmp(netid, p->nconf->nc_netid) == 0) 1137 return (p->nconf); 1138 1139 if ((nconf = getnetconfigent(netid)) == NULL) 1140 return (NULL); 1141 if ((p = malloc(sizeof(*p))) == NULL) 1142 err(1, "malloc"); 1143 p->nconf = nconf; 1144 p->next = head; 1145 head = p; 1146 1147 return (p->nconf); 1148 } 1149 1150 /* 1151 * xdr routines for mount rpc's 1152 */ 1153 static int 1154 xdr_dir(XDR *xdrsp, char *dirp) 1155 { 1156 return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); 1157 } 1158 1159 static int 1160 xdr_fh(XDR *xdrsp, struct nfhret *np) 1161 { 1162 int i; 1163 long auth, authcnt, authfnd = 0; 1164 1165 if (!xdr_u_long(xdrsp, &np->stat)) 1166 return (0); 1167 if (np->stat) 1168 return (1); 1169 switch (np->vers) { 1170 case 1: 1171 np->fhsize = NFS_FHSIZE; 1172 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFS_FHSIZE)); 1173 case 3: 1174 if (!xdr_long(xdrsp, &np->fhsize)) 1175 return (0); 1176 if (np->fhsize <= 0 || np->fhsize > NFS3_FHSIZE) 1177 return (0); 1178 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 1179 return (0); 1180 if (!xdr_long(xdrsp, &authcnt)) 1181 return (0); 1182 for (i = 0; i < authcnt; i++) { 1183 if (!xdr_long(xdrsp, &auth)) 1184 return (0); 1185 if (np->auth == -1) { 1186 np->auth = auth; 1187 authfnd++; 1188 } else if (auth == np->auth) { 1189 authfnd++; 1190 } 1191 } 1192 /* 1193 * Some servers, such as DEC's OSF/1 return a nil authenticator 1194 * list to indicate RPCAUTH_UNIX. 1195 */ 1196 if (authcnt == 0 && np->auth == -1) 1197 np->auth = AUTH_SYS; 1198 if (!authfnd && (authcnt > 0 || np->auth != AUTH_SYS)) 1199 np->stat = EAUTH; 1200 return (1); 1201 }; 1202 return (0); 1203 } 1204 1205 static void 1206 usage(void) 1207 { 1208 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 1209 "usage: mount_nfs [-23bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]", 1210 " [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]", 1211 " [-r readsize] [-t timeout] [-w writesize] [-x retrans]", 1212 " rhost:path node"); 1213 exit(1); 1214 } 1215