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