1 /* 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. 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 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved. 33 * @(#)mount_nfs.c 8.11 (Berkeley) 5/4/95 34 * $FreeBSD: src/sbin/mount_nfs/mount_nfs.c,v 1.36.2.6 2003/05/13 14:45:40 trhodes Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/mount.h> 39 #include <sys/socket.h> 40 #include <sys/stat.h> 41 #include <sys/syslog.h> 42 43 #include <rpc/rpc.h> 44 #include <rpc/pmap_clnt.h> 45 #include <rpc/pmap_prot.h> 46 47 #include <vfs/nfs/rpcv2.h> 48 #include <vfs/nfs/nfsproto.h> 49 #include <vfs/nfs/nfs.h> 50 51 #include <arpa/inet.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <mntopts.h> 58 #include <netdb.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <sysexits.h> 63 #include <unistd.h> 64 65 #include "mounttab.h" 66 67 #define ALTF_BG 0x1 68 #define ALTF_NOCONN 0x2 69 #define ALTF_DUMBTIMR 0x4 70 #define ALTF_INTR 0x8 71 #define ALTF_KERB 0x10 72 #define ALTF_NFSV3 0x20 73 #define ALTF_RDIRPLUS 0x40 74 #define ALTF_CACHE 0x80 75 #define ALTF_RESVPORT 0x100 76 #define ALTF_SEQPACKET 0x200 77 #define ALTF_UNUSED400 0x400 78 #define ALTF_SOFT 0x800 79 #define ALTF_TCP 0x1000 80 #define ALTF_PORT 0x2000 81 #define ALTF_NFSV2 0x4000 82 #define ALTF_ACREGMIN 0x8000 83 #define ALTF_ACREGMAX 0x10000 84 #define ALTF_ACDIRMIN 0x20000 85 #define ALTF_ACDIRMAX 0x40000 86 87 struct mntopt mopts[] = { 88 MOPT_STDOPTS, 89 MOPT_FORCE, 90 MOPT_UPDATE, 91 MOPT_ASYNC, 92 { "bg", 0, ALTF_BG, 1 }, 93 { "conn", 1, ALTF_NOCONN, 1 }, 94 { "dumbtimer", 0, ALTF_DUMBTIMR, 1 }, 95 { "intr", 0, ALTF_INTR, 1 }, 96 #ifdef NFSKERB 97 { "kerb", 0, ALTF_KERB, 1 }, 98 #endif 99 { "nfsv3", 0, ALTF_NFSV3, 1 }, 100 { "rdirplus", 0, ALTF_RDIRPLUS, 1 }, 101 { "mntudp", 1, ALTF_TCP, 1 }, 102 { "resvport", 0, ALTF_RESVPORT, 1 }, 103 { "soft", 0, ALTF_SOFT, 1 }, 104 { "tcp", 0, ALTF_TCP, 1 }, 105 { "udp", 1, ALTF_TCP, 1 }, 106 { "port=", 0, ALTF_PORT, 1 }, 107 { "nfsv2", 0, ALTF_NFSV2, 1 }, 108 { "acregmin=", 0, ALTF_ACREGMIN, 1 }, 109 { "acregmax=", 0, ALTF_ACREGMAX, 1 }, 110 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 }, 111 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 }, 112 { "cache", 0, ALTF_CACHE, 1 }, 113 MOPT_NULL 114 }; 115 116 struct nfs_args nfsdefargs = { 117 NFS_ARGSVERSION, 118 NULL, 119 sizeof (struct sockaddr_in), 120 0, 121 0, 122 NULL, 123 0, 124 NFSMNT_RESVPORT, 125 NFS_WSIZE, 126 NFS_RSIZE, 127 NFS_READDIRSIZE, 128 10, 129 NFS_RETRANS, 130 NFS_MAXGRPS, 131 NFS_DEFRAHEAD, 132 0, 133 NFS_DEADTHRESH, 134 NULL, 135 /* args version 4 */ 136 NFS_MINATTRTIMO, 137 NFS_MAXATTRTIMO, 138 NFS_MINDIRATTRTIMO, 139 NFS_MAXDIRATTRTIMO, 140 }; 141 142 /* Table for af,sotype -> netid conversions. */ 143 struct nc_protos { 144 const char *netid; 145 int af; 146 int sotype; 147 } nc_protos[] = { 148 {"udp", AF_INET, SOCK_DGRAM}, 149 {"tcp", AF_INET, SOCK_STREAM}, 150 {"udp6", AF_INET6, SOCK_DGRAM}, 151 {"tcp6", AF_INET6, SOCK_STREAM}, 152 {NULL, 0, 0} 153 }; 154 155 struct nfhret { 156 u_long stat; 157 long vers; 158 long auth; 159 long fhsize; 160 u_char nfh[NFSX_V3FHMAX]; 161 }; 162 #define BGRND 1 163 #define ISBGRND 2 164 int retrycnt = -1; 165 int opflags = 0; 166 int nfsproto; 167 char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */ 168 enum mountmode { 169 ANY, 170 V2, 171 V3 172 } mountmode = ANY; 173 174 #ifdef NFSKERB 175 char inst[INST_SZ]; 176 char realm[REALM_SZ]; 177 struct { 178 u_long kind; 179 KTEXT_ST kt; 180 } ktick; 181 struct nfsrpc_nickverf kverf; 182 struct nfsrpc_fullblock kin, kout; 183 NFSKERBKEY_T kivec; 184 CREDENTIALS kcr; 185 struct timeval ktv; 186 NFSKERBKEYSCHED_T kerb_keysched; 187 #endif 188 189 /* Return codes for nfs_tryproto. */ 190 enum tryret { 191 TRYRET_SUCCESS, 192 TRYRET_TIMEOUT, /* No response received. */ 193 TRYRET_REMOTEERR, /* Error received from remote server. */ 194 TRYRET_LOCALERR /* Local failure. */ 195 }; 196 197 #if 0 198 void set_rpc_maxgrouplist(int); 199 #endif 200 static struct netconfig *getnetconf_cached(const char *); 201 static const char *netidbytype(int, int); 202 static int getnfsargs(char *, struct nfs_args *); 203 static void usage(void) __dead2; 204 static int xdr_dir(XDR *, char *); 205 static int xdr_fh(XDR *, struct nfhret *); 206 static enum tryret 207 nfs_tryproto(struct nfs_args *, struct addrinfo *, 208 char *, char *, char **); 209 static enum tryret 210 returncode(enum clnt_stat, struct rpc_err *); 211 212 /* 213 * Used to set mount flags with getmntopts. Call with dir=TRUE to 214 * initialize altflags from the current mount flags. Call with 215 * dir=FALSE to update mount flags with the new value of altflags after 216 * the call to getmntopts. 217 */ 218 static void 219 set_flags(int* altflags, int* nfsflags, int dir) 220 { 221 #define F2(af, nf) \ 222 if (dir) { \ 223 if (*nfsflags & NFSMNT_##nf) \ 224 *altflags |= ALTF_##af; \ 225 else \ 226 *altflags &= ~ALTF_##af; \ 227 } else { \ 228 if (*altflags & ALTF_##af) \ 229 *nfsflags |= NFSMNT_##nf; \ 230 else \ 231 *nfsflags &= ~NFSMNT_##nf; \ 232 } 233 #define F(f) F2(f,f) 234 235 F(NOCONN); 236 F(DUMBTIMR); 237 F2(INTR, INT); 238 #ifdef NFSKERB 239 F(KERB); 240 #endif 241 F(RDIRPLUS); 242 F(RESVPORT); 243 F(SOFT); 244 F(ACREGMIN); 245 F(ACREGMAX); 246 F(ACDIRMIN); 247 F(ACDIRMAX); 248 #ifdef NFSMNT_CACHE 249 F(CACHE); 250 #endif 251 252 #undef F 253 #undef F2 254 } 255 256 int 257 main(int argc, char **argv) 258 { 259 int c; 260 struct nfs_args *nfsargsp; 261 struct nfs_args nfsargs; 262 struct nfsd_cargs ncd; 263 int mntflags, altflags, nfssvc_flag, num; 264 char *name, *p, *spec; 265 char mntpath[MAXPATHLEN]; 266 struct vfsconf vfc; 267 int error = 0; 268 #ifdef NFSKERB 269 uid_t last_ruid; 270 271 last_ruid = -1; 272 strcpy(realm, KRB_REALM); 273 if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF || 274 sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK || 275 ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED || 276 ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED) 277 fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n"); 278 #endif /* NFSKERB */ 279 280 mntflags = 0; 281 altflags = ALTF_TCP | ALTF_RDIRPLUS; 282 nfsargs = nfsdefargs; 283 nfsargsp = &nfsargs; 284 if (altflags & ALTF_TCP) { 285 nfsproto = IPPROTO_TCP; 286 nfsargsp->sotype = SOCK_STREAM; 287 } else { 288 nfsproto = IPPROTO_UDP; 289 nfsargsp->sotype = SOCK_DGRAM; 290 } 291 while ((c = getopt(argc, argv, 292 "23a:bcdD:g:I:iKlm:No:PR:r:sTt:w:x:U")) != -1) 293 switch (c) { 294 case '2': 295 mountmode = V2; 296 break; 297 case '3': 298 mountmode = V3; 299 break; 300 case 'a': 301 num = strtol(optarg, &p, 10); 302 if (*p || num < 0) 303 errx(1, "illegal -a value -- %s", optarg); 304 nfsargsp->readahead = num; 305 nfsargsp->flags |= NFSMNT_READAHEAD; 306 break; 307 case 'b': 308 opflags |= BGRND; 309 break; 310 case 'c': 311 nfsargsp->flags |= NFSMNT_NOCONN; 312 break; 313 case 'D': 314 num = strtol(optarg, &p, 10); 315 if (*p || num <= 0) 316 errx(1, "illegal -D value -- %s", optarg); 317 nfsargsp->deadthresh = num; 318 nfsargsp->flags |= NFSMNT_DEADTHRESH; 319 break; 320 case 'd': 321 nfsargsp->flags |= NFSMNT_DUMBTIMR; 322 break; 323 #if 0 /* XXXX */ 324 case 'g': 325 num = strtol(optarg, &p, 10); 326 if (*p || num <= 0) 327 errx(1, "illegal -g value -- %s", optarg); 328 set_rpc_maxgrouplist(num); 329 nfsargsp->maxgrouplist = num; 330 nfsargsp->flags |= NFSMNT_MAXGRPS; 331 break; 332 #endif 333 case 'I': 334 num = strtol(optarg, &p, 10); 335 if (*p || num <= 0) 336 errx(1, "illegal -I value -- %s", optarg); 337 nfsargsp->readdirsize = num; 338 nfsargsp->flags |= NFSMNT_READDIRSIZE; 339 break; 340 case 'i': 341 nfsargsp->flags |= NFSMNT_INT; 342 break; 343 #ifdef NFSKERB 344 case 'K': 345 nfsargsp->flags |= NFSMNT_KERB; 346 break; 347 #endif 348 case 'l': 349 nfsargsp->flags |= NFSMNT_RDIRPLUS; 350 break; 351 #ifdef NFSKERB 352 case 'm': 353 strncpy(realm, optarg, REALM_SZ - 1); 354 realm[REALM_SZ - 1] = '\0'; 355 break; 356 #endif 357 case 'N': 358 nfsargsp->flags &= ~NFSMNT_RESVPORT; 359 break; 360 case 'o': 361 set_flags(&altflags, &nfsargsp->flags, TRUE); 362 altflags |= ALTF_RDIRPLUS; 363 if (nfsproto == IPPROTO_TCP) 364 altflags |= ALTF_TCP; 365 if (mountmode == V2) 366 altflags |= ALTF_NFSV2; 367 else if (mountmode == V3) 368 altflags |= ALTF_NFSV3; 369 getmntopts(optarg, mopts, &mntflags, &altflags); 370 set_flags(&altflags, &nfsargsp->flags, FALSE); 371 /* 372 * Handle altflags which don't map directly to 373 * mount flags. 374 */ 375 if(altflags & ALTF_BG) 376 opflags |= BGRND; 377 if (altflags & ALTF_TCP) { 378 nfsproto = IPPROTO_TCP; 379 nfsargsp->sotype = SOCK_STREAM; 380 } else { 381 nfsproto = IPPROTO_UDP; 382 nfsargsp->sotype = SOCK_DGRAM; 383 } 384 if(altflags & ALTF_PORT) { 385 /* 386 * XXX Converting from a string to an int 387 * and back again is silly, and we should 388 * allow /etc/services names. 389 */ 390 asprintf(&portspec, "%d", 391 atoi(strstr(optarg, "port=") + 5)); 392 if (portspec == NULL) 393 err(1, "asprintf"); 394 } 395 mountmode = ANY; 396 if(altflags & ALTF_NFSV2) 397 mountmode = V2; 398 if(altflags & ALTF_NFSV3) 399 mountmode = V3; 400 if(altflags & ALTF_ACREGMIN) 401 nfsargsp->acregmin = atoi(strstr(optarg, 402 "acregmin=") + 9); 403 if(altflags & ALTF_ACREGMAX) 404 nfsargsp->acregmax = atoi(strstr(optarg, 405 "acregmax=") + 9); 406 if(altflags & ALTF_ACDIRMIN) 407 nfsargsp->acdirmin = atoi(strstr(optarg, 408 "acdirmin=") + 9); 409 if(altflags & ALTF_ACDIRMAX) 410 nfsargsp->acdirmax = atoi(strstr(optarg, 411 "acdirmax=") + 9); 412 break; 413 case 'P': 414 /* obsolete for NFSMNT_RESVPORT, now default */ 415 break; 416 case 'R': 417 num = strtol(optarg, &p, 10); 418 if (*p || num < 0) 419 errx(1, "illegal -R value -- %s", optarg); 420 retrycnt = num; 421 break; 422 case 'r': 423 num = strtol(optarg, &p, 10); 424 if (*p || num <= 0) 425 errx(1, "illegal -r value -- %s", optarg); 426 nfsargsp->rsize = num; 427 nfsargsp->flags |= NFSMNT_RSIZE; 428 break; 429 case 's': 430 nfsargsp->flags |= NFSMNT_SOFT; 431 break; 432 case 'T': 433 nfsargsp->sotype = SOCK_STREAM; 434 nfsproto = IPPROTO_TCP; 435 altflags |= ALTF_TCP; 436 break; 437 case 't': 438 num = strtol(optarg, &p, 10); 439 if (*p || num <= 0) 440 errx(1, "illegal -t value -- %s", optarg); 441 nfsargsp->timeo = num; 442 nfsargsp->flags |= NFSMNT_TIMEO; 443 break; 444 case 'w': 445 num = strtol(optarg, &p, 10); 446 if (*p || num <= 0) 447 errx(1, "illegal -w value -- %s", optarg); 448 nfsargsp->wsize = num; 449 nfsargsp->flags |= NFSMNT_WSIZE; 450 break; 451 case 'x': 452 num = strtol(optarg, &p, 10); 453 if (*p || num <= 0) 454 errx(1, "illegal -x value -- %s", optarg); 455 nfsargsp->retrans = num; 456 nfsargsp->flags |= NFSMNT_RETRANS; 457 break; 458 case 'U': 459 nfsargsp->sotype = SOCK_DGRAM; 460 nfsproto = IPPROTO_UDP; 461 altflags &= ~ALTF_TCP; 462 break; 463 default: 464 usage(); 465 break; 466 } 467 argc -= optind; 468 argv += optind; 469 470 if (argc != 2) { 471 usage(); 472 /* NOTREACHED */ 473 } 474 475 spec = *argv++; 476 name = *argv; 477 478 if (retrycnt == -1) 479 /* The default is to keep retrying forever. */ 480 retrycnt = 0; 481 if (!getnfsargs(spec, nfsargsp)) 482 exit(1); 483 484 /* resolve the mountpoint with realpath(3) */ 485 checkpath(name, mntpath); 486 487 error = getvfsbyname("nfs", &vfc); 488 if (error && vfsisloadable("nfs")) { 489 if(vfsload("nfs")) 490 err(EX_OSERR, "vfsload(nfs)"); 491 endvfsent(); /* clear cache */ 492 error = getvfsbyname("nfs", &vfc); 493 } 494 if (error) 495 errx(EX_OSERR, "nfs filesystem is not available"); 496 497 if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp)) 498 err(1, "%s", mntpath); 499 if (nfsargsp->flags & NFSMNT_KERB) { 500 if ((opflags & ISBGRND) == 0) { 501 if (daemon(0, 0) != 0) 502 err(1, "daemon"); 503 } 504 openlog("mount_nfs", LOG_PID, LOG_DAEMON); 505 nfssvc_flag = NFSSVC_MNTD; 506 ncd.ncd_dirp = mntpath; 507 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { 508 if (errno != ENEEDAUTH) { 509 syslog(LOG_ERR, "nfssvc err %m"); 510 continue; 511 } 512 nfssvc_flag = 513 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; 514 #ifdef NFSKERB 515 /* 516 * Set up as ncd_authuid for the kerberos call. 517 * Must set ruid to ncd_authuid and reset the 518 * ticket name iff ncd_authuid is not the same 519 * as last time, so that the right ticket file 520 * is found. 521 * Get the Kerberos credential structure so that 522 * we have the session key and get a ticket for 523 * this uid. 524 * For more info see the IETF Draft "Authentication 525 * in ONC RPC". 526 */ 527 if (ncd.ncd_authuid != last_ruid) { 528 char buf[512]; 529 sprintf(buf, "%s%d", TKT_ROOT, ncd.ncd_authuid); 530 krb_set_tkt_string(buf); 531 last_ruid = ncd.ncd_authuid; 532 } 533 setreuid(ncd.ncd_authuid, 0); 534 kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr); 535 if (kret == RET_NOTKT) { 536 kret = get_ad_tkt(NFS_KERBSRV, inst, realm, 537 DEFAULT_TKT_LIFE); 538 if (kret == KSUCCESS) 539 kret = krb_get_cred(NFS_KERBSRV, inst, realm, 540 &kcr); 541 } 542 if (kret == KSUCCESS) 543 kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst, 544 realm, 0); 545 546 /* 547 * Fill in the AKN_FULLNAME authenticator and verifier. 548 * Along with the Kerberos ticket, we need to build 549 * the timestamp verifier and encrypt it in CBC mode. 550 */ 551 if (kret == KSUCCESS && 552 ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED) 553 && gettimeofday(&ktv, NULL) == 0) { 554 ncd.ncd_authtype = RPCAUTH_KERB4; 555 ncd.ncd_authstr = (u_char *)&ktick; 556 ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) + 557 3 * NFSX_UNSIGNED; 558 ncd.ncd_verfstr = (u_char *)&kverf; 559 ncd.ncd_verflen = sizeof (kverf); 560 memmove(ncd.ncd_key, kcr.session, 561 sizeof (kcr.session)); 562 kin.t1 = htonl(ktv.tv_sec); 563 kin.t2 = htonl(ktv.tv_usec); 564 kin.w1 = htonl(NFS_KERBTTL); 565 kin.w2 = htonl(NFS_KERBTTL - 1); 566 bzero((caddr_t)kivec, sizeof (kivec)); 567 568 /* 569 * Encrypt kin in CBC mode using the session 570 * key in kcr. 571 */ 572 XXX 573 574 /* 575 * Finally, fill the timestamp verifier into the 576 * authenticator and verifier. 577 */ 578 ktick.kind = htonl(RPCAKN_FULLNAME); 579 kverf.kind = htonl(RPCAKN_FULLNAME); 580 NFS_KERBW1(ktick.kt) = kout.w1; 581 ktick.kt.length = htonl(ktick.kt.length); 582 kverf.verf.t1 = kout.t1; 583 kverf.verf.t2 = kout.t2; 584 kverf.verf.w2 = kout.w2; 585 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; 586 } 587 setreuid(0, 0); 588 #endif /* NFSKERB */ 589 } 590 } 591 exit(0); 592 } 593 594 static int 595 getnfsargs(char *spec, struct nfs_args *nfsargsp) 596 { 597 struct addrinfo hints, *ai_nfs, *ai; 598 #ifdef NFSKERB 599 char host[NI_MAXHOST], serv[NI_MAXSERV]; 600 #endif 601 enum tryret ret; 602 int ecode, speclen, remoteerr; 603 char *hostp, *delimp, *errstr; 604 #ifdef NFSKERB 605 char *cp; 606 #endif 607 size_t len; 608 static char nam[MNAMELEN + 1]; 609 610 if ((delimp = strrchr(spec, ':')) != NULL) { 611 hostp = spec; 612 spec = delimp + 1; 613 } else if ((delimp = strrchr(spec, '@')) != NULL) { 614 warnx("path@server syntax is deprecated, use server:path"); 615 hostp = delimp + 1; 616 } else { 617 warnx("no <host>:<dirpath> nfs-name"); 618 return (0); 619 } 620 *delimp = '\0'; 621 622 /* 623 * If there has been a trailing slash at mounttime it seems 624 * that some mountd implementations fail to remove the mount 625 * entries from their mountlist while unmounting. 626 */ 627 for (speclen = strlen(spec); 628 speclen > 1 && spec[speclen - 1] == '/'; 629 speclen--) 630 spec[speclen - 1] = '\0'; 631 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 632 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); 633 return (0); 634 } 635 /* Make both '@' and ':' notations equal */ 636 if (*hostp != '\0') { 637 len = strlen(hostp); 638 memmove(nam, hostp, len); 639 nam[len] = ':'; 640 memmove(nam + len + 1, spec, speclen); 641 nam[len + speclen + 1] = '\0'; 642 } 643 644 /* 645 * Handle an internet host address and reverse resolve it if 646 * doing Kerberos. 647 */ 648 memset(&hints, 0, sizeof hints); 649 hints.ai_flags = AI_NUMERICHOST; 650 hints.ai_socktype = nfsargsp->sotype; 651 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) == 0) { 652 #ifdef NFSKERB 653 if ((nfsargsp->flags & NFSMNT_KERB)) { 654 hints.ai_flags = 0; 655 if (getnameinfo(ai_nfs->ai_addr, ai_nfs->ai_addrlen, 656 host, sizeof host, serv, sizeof serv, 0) != 0) { 657 warnx("can't reverse resolve net address"); 658 return (0); 659 } 660 hostp = host; 661 } 662 #endif /* NFSKERB */ 663 } else { 664 hints.ai_flags = 0; 665 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) 666 != 0) { 667 if (portspec == NULL) 668 errx(1, "%s: %s", hostp, gai_strerror(ecode)); 669 else 670 errx(1, "%s:%s: %s", hostp, portspec, 671 gai_strerror(ecode)); 672 return (0); 673 } 674 } 675 #ifdef NFSKERB 676 if (nfsargsp->flags & NFSMNT_KERB) { 677 strncpy(inst, hp->h_name, INST_SZ); 678 inst[INST_SZ - 1] = '\0'; 679 if (cp = strchr(inst, '.')) 680 *cp = '\0'; 681 } 682 #endif /* NFSKERB */ 683 684 ret = TRYRET_LOCALERR; 685 for (;;) { 686 /* 687 * Try each entry returned by getaddrinfo(). Note the 688 * occurence of remote errors by setting `remoteerr'. 689 */ 690 remoteerr = 0; 691 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { 692 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr); 693 if (ret == TRYRET_SUCCESS) 694 break; 695 if (ret != TRYRET_LOCALERR) 696 remoteerr = 1; 697 if ((opflags & ISBGRND) == 0) 698 fprintf(stderr, "%s\n", errstr); 699 } 700 if (ret == TRYRET_SUCCESS) 701 break; 702 703 /* Exit if all errors were local. */ 704 if (!remoteerr) 705 exit(1); 706 707 /* 708 * If retrycnt == 0, we are to keep retrying forever. 709 * Otherwise decrement it, and exit if it hits zero. 710 */ 711 if (retrycnt != 0 && --retrycnt == 0) 712 exit(1); 713 714 if ((opflags & (BGRND | ISBGRND)) == BGRND) { 715 warnx("Cannot immediately mount %s:%s, backgrounding", 716 hostp, spec); 717 opflags |= ISBGRND; 718 if (daemon(0, 0) != 0) 719 err(1, "daemon"); 720 } 721 sleep(60); 722 } 723 freeaddrinfo(ai_nfs); 724 nfsargsp->hostname = nam; 725 /* Add mounted filesystem to PATH_MOUNTTAB */ 726 if (!add_mtab(hostp, spec)) 727 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); 728 return (1); 729 } 730 731 /* 732 * Try to set up the NFS arguments according to the address 733 * family, protocol (and possibly port) specified in `ai'. 734 * 735 * Returns TRYRET_SUCCESS if successful, or: 736 * TRYRET_TIMEOUT The server did not respond. 737 * TRYRET_REMOTEERR The server reported an error. 738 * TRYRET_LOCALERR Local failure. 739 * 740 * In all error cases, *errstr will be set to a statically-allocated string 741 * describing the error. 742 */ 743 static enum tryret 744 nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, 745 char *spec, char **errstr) 746 { 747 static char errbuf[256]; 748 struct sockaddr_storage nfs_ss; 749 struct netbuf nfs_nb; 750 struct nfhret nfhret; 751 struct timeval try; 752 struct rpc_err rpcerr; 753 CLIENT *clp; 754 struct netconfig *nconf, *nconf_mnt; 755 const char *netid, *netid_mnt; 756 int doconnect, nfsvers, mntvers; 757 enum clnt_stat status; 758 enum mountmode trymntmode; 759 760 trymntmode = mountmode; 761 errbuf[0] = '\0'; 762 *errstr = errbuf; 763 764 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) { 765 snprintf(errbuf, sizeof errbuf, 766 "af %d sotype %d not supported", ai->ai_family, 767 nfsargsp->sotype); 768 return (TRYRET_LOCALERR); 769 } 770 if ((nconf = getnetconf_cached(netid)) == NULL) { 771 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); 772 return (TRYRET_LOCALERR); 773 } 774 775 netid_mnt = netid; 776 nconf_mnt = nconf; 777 778 tryagain: 779 if (trymntmode == V2) { 780 nfsvers = 2; 781 mntvers = 1; 782 } else { 783 nfsvers = 3; 784 mntvers = 3; 785 } 786 787 if (portspec != NULL) { 788 /* `ai' contains the complete nfsd sockaddr. */ 789 nfs_nb.buf = ai->ai_addr; 790 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; 791 } else { 792 /* Ask the remote rpcbind. */ 793 nfs_nb.buf = &nfs_ss; 794 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; 795 796 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, 797 hostp)) { 798 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && 799 trymntmode == ANY) { 800 trymntmode = V2; 801 goto tryagain; 802 } 803 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", 804 netid, hostp, spec, 805 clnt_spcreateerror("RPCPROG_NFS")); 806 return (returncode(rpc_createerr.cf_stat, 807 &rpc_createerr.cf_error)); 808 } 809 } 810 811 /* Check that the server (nfsd) responds on the port we have chosen. */ 812 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers, 813 0, 0); 814 if (clp == NULL) { 815 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 816 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); 817 return (returncode(rpc_createerr.cf_stat, 818 &rpc_createerr.cf_error)); 819 } 820 if (nfsargsp->sotype == SOCK_DGRAM && 821 !(nfsargsp->flags & NFSMNT_NOCONN)) { 822 /* 823 * Use connect(), to match what the kernel does. This 824 * catches cases where the server responds from the 825 * wrong source address. 826 */ 827 doconnect = 1; 828 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { 829 clnt_destroy(clp); 830 snprintf(errbuf, sizeof errbuf, 831 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, 832 spec); 833 return (TRYRET_LOCALERR); 834 } 835 } 836 837 try.tv_sec = 10; 838 try.tv_usec = 0; 839 status = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL, 840 (xdrproc_t)xdr_void, NULL, try); 841 if (status != RPC_SUCCESS) { 842 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 843 clnt_destroy(clp); 844 trymntmode = V2; 845 goto tryagain; 846 } 847 clnt_geterr(clp, &rpcerr); 848 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 849 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); 850 clnt_destroy(clp); 851 return (returncode(status, &rpcerr)); 852 } 853 clnt_destroy(clp); 854 855 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */ 856 try.tv_sec = 10; 857 try.tv_usec = 0; 858 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt); 859 if (clp == NULL) { 860 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 861 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); 862 return (returncode(rpc_createerr.cf_stat, 863 &rpc_createerr.cf_error)); 864 } 865 clp->cl_auth = authsys_create_default(); 866 if (nfsargsp->flags & NFSMNT_KERB) 867 nfhret.auth = RPCAUTH_KERB4; 868 else 869 nfhret.auth = RPCAUTH_UNIX; 870 nfhret.vers = mntvers; 871 status = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec, 872 (xdrproc_t)xdr_fh, &nfhret, try); 873 auth_destroy(clp->cl_auth); 874 if (status != RPC_SUCCESS) { 875 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 876 clnt_destroy(clp); 877 trymntmode = V2; 878 goto tryagain; 879 } 880 clnt_geterr(clp, &rpcerr); 881 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 882 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); 883 clnt_destroy(clp); 884 return (returncode(status, &rpcerr)); 885 } 886 clnt_destroy(clp); 887 888 if (nfhret.stat != 0) { 889 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 890 hostp, spec, strerror(nfhret.stat)); 891 return (TRYRET_REMOTEERR); 892 } 893 894 /* 895 * Store the filehandle and server address in nfsargsp, making 896 * sure to copy any locally allocated structures. 897 */ 898 nfsargsp->addrlen = nfs_nb.len; 899 nfsargsp->addr = malloc(nfsargsp->addrlen); 900 nfsargsp->fhsize = nfhret.fhsize; 901 nfsargsp->fh = malloc(nfsargsp->fhsize); 902 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL) 903 err(1, "malloc"); 904 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen); 905 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize); 906 907 if (nfsvers == 3) 908 nfsargsp->flags |= NFSMNT_NFSV3; 909 else 910 nfsargsp->flags &= ~NFSMNT_NFSV3; 911 912 return (TRYRET_SUCCESS); 913 } 914 915 916 /* 917 * Catagorise a RPC return status and error into an `enum tryret' 918 * return code. 919 */ 920 static enum tryret 921 returncode(enum clnt_stat status, struct rpc_err *rpcerr) 922 { 923 switch (status) { 924 case RPC_TIMEDOUT: 925 return (TRYRET_TIMEOUT); 926 case RPC_PMAPFAILURE: 927 case RPC_PROGNOTREGISTERED: 928 case RPC_PROGVERSMISMATCH: 929 /* XXX, these can be local or remote. */ 930 case RPC_CANTSEND: 931 case RPC_CANTRECV: 932 return (TRYRET_REMOTEERR); 933 case RPC_SYSTEMERROR: 934 switch (rpcerr->re_errno) { 935 case ETIMEDOUT: 936 return (TRYRET_TIMEOUT); 937 case ENOMEM: 938 break; 939 default: 940 return (TRYRET_REMOTEERR); 941 } 942 /* FALLTHROUGH */ 943 default: 944 break; 945 } 946 return (TRYRET_LOCALERR); 947 } 948 949 /* 950 * Look up a netid based on an address family and socket type. 951 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. 952 * 953 * XXX there should be a library function for this. 954 */ 955 static const char * 956 netidbytype(int af, int sotype) 957 { 958 struct nc_protos *p; 959 960 for (p = nc_protos; p->netid != NULL; p++) { 961 if (af != p->af || sotype != p->sotype) 962 continue; 963 return (p->netid); 964 } 965 return (NULL); 966 } 967 968 /* 969 * Look up a netconfig entry based on a netid, and cache the result so 970 * that we don't need to remember to call freenetconfigent(). 971 * 972 * Otherwise it behaves just like getnetconfigent(), so nc_*error() 973 * work on failure. 974 */ 975 static struct netconfig * 976 getnetconf_cached(const char *netid) 977 { 978 static struct nc_entry { 979 struct netconfig *nconf; 980 struct nc_entry *next; 981 } *head; 982 struct nc_entry *p; 983 struct netconfig *nconf; 984 985 for (p = head; p != NULL; p = p->next) 986 if (strcmp(netid, p->nconf->nc_netid) == 0) 987 return (p->nconf); 988 989 if ((nconf = getnetconfigent(netid)) == NULL) 990 return (NULL); 991 if ((p = malloc(sizeof(*p))) == NULL) 992 err(1, "malloc"); 993 p->nconf = nconf; 994 p->next = head; 995 head = p; 996 997 return (p->nconf); 998 } 999 1000 /* 1001 * xdr routines for mount rpc's 1002 */ 1003 static int 1004 xdr_dir(XDR *xdrsp, char *dirp) 1005 { 1006 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 1007 } 1008 1009 static int 1010 xdr_fh(XDR *xdrsp, struct nfhret *np) 1011 { 1012 int i; 1013 long auth, authcnt, authfnd = 0; 1014 1015 if (!xdr_u_long(xdrsp, &np->stat)) 1016 return (0); 1017 if (np->stat) 1018 return (1); 1019 switch (np->vers) { 1020 case 1: 1021 np->fhsize = NFSX_V2FH; 1022 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 1023 case 3: 1024 if (!xdr_long(xdrsp, &np->fhsize)) 1025 return (0); 1026 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 1027 return (0); 1028 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 1029 return (0); 1030 if (!xdr_long(xdrsp, &authcnt)) 1031 return (0); 1032 for (i = 0; i < authcnt; i++) { 1033 if (!xdr_long(xdrsp, &auth)) 1034 return (0); 1035 if (auth == np->auth) 1036 authfnd++; 1037 } 1038 /* 1039 * Some servers, such as DEC's OSF/1 return a nil authenticator 1040 * list to indicate RPCAUTH_UNIX. 1041 */ 1042 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 1043 np->stat = EAUTH; 1044 return (1); 1045 }; 1046 return (0); 1047 } 1048 1049 static void 1050 usage(void) 1051 { 1052 fprintf(stderr, "%s\n%s\n%s\n%s\n", 1053 "usage: mount_nfs [-23KNPTUbcdils] [-D deadthresh] [-I readdirsize]", 1054 " [-R retrycnt] [-a maxreadahead]", 1055 " [-g maxgroups] [-m realm] [-o options] [-r readsize]", 1056 " [-t timeout] [-w writesize] [-x retrans] rhost:path node"); 1057 exit(1); 1058 } 1059