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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved. 37 * @(#)mount_nfs.c 8.11 (Berkeley) 5/4/95 38 * $FreeBSD: src/sbin/mount_nfs/mount_nfs.c,v 1.36.2.6 2003/05/13 14:45:40 trhodes Exp $ 39 * $DragonFly: src/sbin/mount_nfs/mount_nfs.c,v 1.14 2008/07/14 22:22:40 dillon Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/socket.h> 45 #include <sys/stat.h> 46 #include <sys/syslog.h> 47 48 #include <rpc/rpc.h> 49 #include <rpc/pmap_clnt.h> 50 #include <rpc/pmap_prot.h> 51 52 #include <vfs/nfs/rpcv2.h> 53 #include <vfs/nfs/nfsproto.h> 54 #include <vfs/nfs/nfs.h> 55 56 #include <arpa/inet.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <fcntl.h> 62 #include <netdb.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <sysexits.h> 67 #include <unistd.h> 68 69 #include "mntopts.h" 70 #include "mounttab.h" 71 72 #define ALTF_BG 0x1 73 #define ALTF_NOCONN 0x2 74 #define ALTF_DUMBTIMR 0x4 75 #define ALTF_INTR 0x8 76 #define ALTF_KERB 0x10 77 #define ALTF_NFSV3 0x20 78 #define ALTF_RDIRPLUS 0x40 79 #define ALTF_MNTUDP 0x80 80 #define ALTF_RESVPORT 0x100 81 #define ALTF_SEQPACKET 0x200 82 #define ALTF_UNUSED400 0x400 83 #define ALTF_SOFT 0x800 84 #define ALTF_TCP 0x1000 85 #define ALTF_PORT 0x2000 86 #define ALTF_NFSV2 0x4000 87 #define ALTF_ACREGMIN 0x8000 88 #define ALTF_ACREGMAX 0x10000 89 #define ALTF_ACDIRMIN 0x20000 90 #define ALTF_ACDIRMAX 0x40000 91 92 struct mntopt mopts[] = { 93 MOPT_STDOPTS, 94 MOPT_FORCE, 95 MOPT_UPDATE, 96 MOPT_ASYNC, 97 { "bg", 0, ALTF_BG, 1 }, 98 { "conn", 1, ALTF_NOCONN, 1 }, 99 { "dumbtimer", 0, ALTF_DUMBTIMR, 1 }, 100 { "intr", 0, ALTF_INTR, 1 }, 101 #ifdef NFSKERB 102 { "kerb", 0, ALTF_KERB, 1 }, 103 #endif 104 { "nfsv3", 0, ALTF_NFSV3, 1 }, 105 { "rdirplus", 0, ALTF_RDIRPLUS, 1 }, 106 { "mntudp", 0, ALTF_MNTUDP, 1 }, 107 { "resvport", 0, ALTF_RESVPORT, 1 }, 108 { "soft", 0, ALTF_SOFT, 1 }, 109 { "tcp", 0, ALTF_TCP, 1 }, 110 { "port=", 0, ALTF_PORT, 1 }, 111 { "nfsv2", 0, ALTF_NFSV2, 1 }, 112 { "acregmin=", 0, ALTF_ACREGMIN, 1 }, 113 { "acregmax=", 0, ALTF_ACREGMAX, 1 }, 114 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 }, 115 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 }, 116 MOPT_NULL 117 }; 118 119 struct nfs_args nfsdefargs = { 120 NFS_ARGSVERSION, 121 NULL, 122 sizeof (struct sockaddr_in), 123 SOCK_DGRAM, 124 0, 125 NULL, 126 0, 127 NFSMNT_RESVPORT, 128 NFS_WSIZE, 129 NFS_RSIZE, 130 NFS_READDIRSIZE, 131 10, 132 NFS_RETRANS, 133 NFS_MAXGRPS, 134 NFS_DEFRAHEAD, 135 0, 136 NFS_DEADTHRESH, 137 NULL, 138 /* args version 4 */ 139 NFS_MINATTRTIMO, 140 NFS_MAXATTRTIMO, 141 NFS_MINDIRATTRTIMO, 142 NFS_MAXDIRATTRTIMO, 143 }; 144 145 /* Table for af,sotype -> netid conversions. */ 146 struct nc_protos { 147 const char *netid; 148 int af; 149 int sotype; 150 } nc_protos[] = { 151 {"udp", AF_INET, SOCK_DGRAM}, 152 {"tcp", AF_INET, SOCK_STREAM}, 153 {"udp6", AF_INET6, SOCK_DGRAM}, 154 {"tcp6", AF_INET6, SOCK_STREAM}, 155 {NULL, 0, 0} 156 }; 157 158 struct nfhret { 159 u_long stat; 160 long vers; 161 long auth; 162 long fhsize; 163 u_char nfh[NFSX_V3FHMAX]; 164 }; 165 #define BGRND 1 166 #define ISBGRND 2 167 int retrycnt = -1; 168 int opflags = 0; 169 int nfsproto = IPPROTO_UDP; 170 int mnttcp_ok = 1; 171 char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */ 172 enum mountmode { 173 ANY, 174 V2, 175 V3 176 } mountmode = ANY; 177 178 #ifdef NFSKERB 179 char inst[INST_SZ]; 180 char realm[REALM_SZ]; 181 struct { 182 u_long kind; 183 KTEXT_ST kt; 184 } ktick; 185 struct nfsrpc_nickverf kverf; 186 struct nfsrpc_fullblock kin, kout; 187 NFSKERBKEY_T kivec; 188 CREDENTIALS kcr; 189 struct timeval ktv; 190 NFSKERBKEYSCHED_T kerb_keysched; 191 #endif 192 193 /* Return codes for nfs_tryproto. */ 194 enum tryret { 195 TRYRET_SUCCESS, 196 TRYRET_TIMEOUT, /* No response received. */ 197 TRYRET_REMOTEERR, /* Error received from remote server. */ 198 TRYRET_LOCALERR /* Local failure. */ 199 }; 200 201 #if 0 202 void set_rpc_maxgrouplist(int); 203 #endif 204 static struct netconfig *getnetconf_cached(const char *); 205 static const char *netidbytype(int, int); 206 static int getnfsargs(char *, struct nfs_args *); 207 static void usage(void) __dead2; 208 static int xdr_dir(XDR *, char *); 209 static int xdr_fh(XDR *, struct nfhret *); 210 static enum tryret 211 nfs_tryproto(struct nfs_args *, struct addrinfo *, 212 char *, char *, char **); 213 static enum tryret 214 returncode(enum clnt_stat, struct rpc_err *); 215 216 /* 217 * Used to set mount flags with getmntopts. Call with dir=TRUE to 218 * initialize altflags from the current mount flags. Call with 219 * dir=FALSE to update mount flags with the new value of altflags after 220 * the call to getmntopts. 221 */ 222 static void 223 set_flags(int* altflags, int* nfsflags, int dir) 224 { 225 #define F2(af, nf) \ 226 if (dir) { \ 227 if (*nfsflags & NFSMNT_##nf) \ 228 *altflags |= ALTF_##af; \ 229 else \ 230 *altflags &= ~ALTF_##af; \ 231 } else { \ 232 if (*altflags & ALTF_##af) \ 233 *nfsflags |= NFSMNT_##nf; \ 234 else \ 235 *nfsflags &= ~NFSMNT_##nf; \ 236 } 237 #define F(f) F2(f,f) 238 239 F(NOCONN); 240 F(DUMBTIMR); 241 F2(INTR, INT); 242 #ifdef NFSKERB 243 F(KERB); 244 #endif 245 F(RDIRPLUS); 246 F(RESVPORT); 247 F(SOFT); 248 F(ACREGMIN); 249 F(ACREGMAX); 250 F(ACDIRMIN); 251 F(ACDIRMAX); 252 253 #undef F 254 #undef F2 255 } 256 257 int 258 main(int argc, char **argv) 259 { 260 int c; 261 struct nfs_args *nfsargsp; 262 struct nfs_args nfsargs; 263 struct nfsd_cargs ncd; 264 int mntflags, altflags, nfssvc_flag, num; 265 char *name, *p, *spec; 266 char mntpath[MAXPATHLEN]; 267 struct vfsconf vfc; 268 int error = 0; 269 #ifdef NFSKERB 270 uid_t last_ruid; 271 272 last_ruid = -1; 273 strcpy(realm, KRB_REALM); 274 if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF || 275 sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK || 276 ((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED || 277 ((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED) 278 fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n"); 279 #endif /* NFSKERB */ 280 281 mntflags = 0; 282 altflags = 0; 283 nfsargs = nfsdefargs; 284 nfsargsp = &nfsargs; 285 while ((c = getopt(argc, argv, 286 "23a:bcdD:g:I:iKlm:No:PR:r:sTt:w:x:U")) != -1) 287 switch (c) { 288 case '2': 289 mountmode = V2; 290 break; 291 case '3': 292 mountmode = V3; 293 break; 294 case 'a': 295 num = strtol(optarg, &p, 10); 296 if (*p || num < 0) 297 errx(1, "illegal -a value -- %s", optarg); 298 nfsargsp->readahead = num; 299 nfsargsp->flags |= NFSMNT_READAHEAD; 300 break; 301 case 'b': 302 opflags |= BGRND; 303 break; 304 case 'c': 305 nfsargsp->flags |= NFSMNT_NOCONN; 306 break; 307 case 'D': 308 num = strtol(optarg, &p, 10); 309 if (*p || num <= 0) 310 errx(1, "illegal -D value -- %s", optarg); 311 nfsargsp->deadthresh = num; 312 nfsargsp->flags |= NFSMNT_DEADTHRESH; 313 break; 314 case 'd': 315 nfsargsp->flags |= NFSMNT_DUMBTIMR; 316 break; 317 #if 0 /* XXXX */ 318 case 'g': 319 num = strtol(optarg, &p, 10); 320 if (*p || num <= 0) 321 errx(1, "illegal -g value -- %s", optarg); 322 set_rpc_maxgrouplist(num); 323 nfsargsp->maxgrouplist = num; 324 nfsargsp->flags |= NFSMNT_MAXGRPS; 325 break; 326 #endif 327 case 'I': 328 num = strtol(optarg, &p, 10); 329 if (*p || num <= 0) 330 errx(1, "illegal -I value -- %s", optarg); 331 nfsargsp->readdirsize = num; 332 nfsargsp->flags |= NFSMNT_READDIRSIZE; 333 break; 334 case 'i': 335 nfsargsp->flags |= NFSMNT_INT; 336 break; 337 #ifdef NFSKERB 338 case 'K': 339 nfsargsp->flags |= NFSMNT_KERB; 340 break; 341 #endif 342 case 'l': 343 nfsargsp->flags |= NFSMNT_RDIRPLUS; 344 break; 345 #ifdef NFSKERB 346 case 'm': 347 strncpy(realm, optarg, REALM_SZ - 1); 348 realm[REALM_SZ - 1] = '\0'; 349 break; 350 #endif 351 case 'N': 352 nfsargsp->flags &= ~NFSMNT_RESVPORT; 353 break; 354 case 'o': 355 altflags = 0; 356 set_flags(&altflags, &nfsargsp->flags, TRUE); 357 if (mountmode == V2) 358 altflags |= ALTF_NFSV2; 359 else if (mountmode == V3) 360 altflags |= ALTF_NFSV3; 361 getmntopts(optarg, mopts, &mntflags, &altflags); 362 set_flags(&altflags, &nfsargsp->flags, FALSE); 363 /* 364 * Handle altflags which don't map directly to 365 * mount flags. 366 */ 367 if(altflags & ALTF_BG) 368 opflags |= BGRND; 369 if(altflags & ALTF_MNTUDP) 370 mnttcp_ok = 0; 371 if(altflags & ALTF_TCP) { 372 nfsargsp->sotype = SOCK_STREAM; 373 nfsproto = IPPROTO_TCP; 374 } 375 if(altflags & ALTF_PORT) { 376 /* 377 * XXX Converting from a string to an int 378 * and back again is silly, and we should 379 * allow /etc/services names. 380 */ 381 asprintf(&portspec, "%d", 382 atoi(strstr(optarg, "port=") + 5)); 383 if (portspec == NULL) 384 err(1, "asprintf"); 385 } 386 mountmode = ANY; 387 if(altflags & ALTF_NFSV2) 388 mountmode = V2; 389 if(altflags & ALTF_NFSV3) 390 mountmode = V3; 391 if(altflags & ALTF_ACREGMIN) 392 nfsargsp->acregmin = atoi(strstr(optarg, 393 "acregmin=") + 9); 394 if(altflags & ALTF_ACREGMAX) 395 nfsargsp->acregmax = atoi(strstr(optarg, 396 "acregmax=") + 9); 397 if(altflags & ALTF_ACDIRMIN) 398 nfsargsp->acdirmin = atoi(strstr(optarg, 399 "acdirmin=") + 9); 400 if(altflags & ALTF_ACDIRMAX) 401 nfsargsp->acdirmax = atoi(strstr(optarg, 402 "acdirmax=") + 9); 403 break; 404 case 'P': 405 /* obsolete for NFSMNT_RESVPORT, now default */ 406 break; 407 case 'R': 408 num = strtol(optarg, &p, 10); 409 if (*p || num < 0) 410 errx(1, "illegal -R value -- %s", optarg); 411 retrycnt = num; 412 break; 413 case 'r': 414 num = strtol(optarg, &p, 10); 415 if (*p || num <= 0) 416 errx(1, "illegal -r value -- %s", optarg); 417 nfsargsp->rsize = num; 418 nfsargsp->flags |= NFSMNT_RSIZE; 419 break; 420 case 's': 421 nfsargsp->flags |= NFSMNT_SOFT; 422 break; 423 case 'T': 424 nfsargsp->sotype = SOCK_STREAM; 425 nfsproto = IPPROTO_TCP; 426 break; 427 case 't': 428 num = strtol(optarg, &p, 10); 429 if (*p || num <= 0) 430 errx(1, "illegal -t value -- %s", optarg); 431 nfsargsp->timeo = num; 432 nfsargsp->flags |= NFSMNT_TIMEO; 433 break; 434 case 'w': 435 num = strtol(optarg, &p, 10); 436 if (*p || num <= 0) 437 errx(1, "illegal -w value -- %s", optarg); 438 nfsargsp->wsize = num; 439 nfsargsp->flags |= NFSMNT_WSIZE; 440 break; 441 case 'x': 442 num = strtol(optarg, &p, 10); 443 if (*p || num <= 0) 444 errx(1, "illegal -x value -- %s", optarg); 445 nfsargsp->retrans = num; 446 nfsargsp->flags |= NFSMNT_RETRANS; 447 break; 448 case 'U': 449 mnttcp_ok = 0; 450 break; 451 default: 452 usage(); 453 break; 454 } 455 argc -= optind; 456 argv += optind; 457 458 if (argc != 2) { 459 usage(); 460 /* NOTREACHED */ 461 } 462 463 spec = *argv++; 464 name = *argv; 465 466 if (retrycnt == -1) 467 /* The default is to keep retrying forever. */ 468 retrycnt = 0; 469 if (!getnfsargs(spec, nfsargsp)) 470 exit(1); 471 472 /* resolve the mountpoint with realpath(3) */ 473 checkpath(name, mntpath); 474 475 error = getvfsbyname("nfs", &vfc); 476 if (error && vfsisloadable("nfs")) { 477 if(vfsload("nfs")) 478 err(EX_OSERR, "vfsload(nfs)"); 479 endvfsent(); /* clear cache */ 480 error = getvfsbyname("nfs", &vfc); 481 } 482 if (error) 483 errx(EX_OSERR, "nfs filesystem is not available"); 484 485 if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp)) 486 err(1, "%s", mntpath); 487 if (nfsargsp->flags & NFSMNT_KERB) { 488 if ((opflags & ISBGRND) == 0) { 489 if (daemon(0, 0) != 0) 490 err(1, "daemon"); 491 } 492 openlog("mount_nfs", LOG_PID, LOG_DAEMON); 493 nfssvc_flag = NFSSVC_MNTD; 494 ncd.ncd_dirp = mntpath; 495 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { 496 if (errno != ENEEDAUTH) { 497 syslog(LOG_ERR, "nfssvc err %m"); 498 continue; 499 } 500 nfssvc_flag = 501 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; 502 #ifdef NFSKERB 503 /* 504 * Set up as ncd_authuid for the kerberos call. 505 * Must set ruid to ncd_authuid and reset the 506 * ticket name iff ncd_authuid is not the same 507 * as last time, so that the right ticket file 508 * is found. 509 * Get the Kerberos credential structure so that 510 * we have the session key and get a ticket for 511 * this uid. 512 * For more info see the IETF Draft "Authentication 513 * in ONC RPC". 514 */ 515 if (ncd.ncd_authuid != last_ruid) { 516 char buf[512]; 517 sprintf(buf, "%s%d", TKT_ROOT, ncd.ncd_authuid); 518 krb_set_tkt_string(buf); 519 last_ruid = ncd.ncd_authuid; 520 } 521 setreuid(ncd.ncd_authuid, 0); 522 kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr); 523 if (kret == RET_NOTKT) { 524 kret = get_ad_tkt(NFS_KERBSRV, inst, realm, 525 DEFAULT_TKT_LIFE); 526 if (kret == KSUCCESS) 527 kret = krb_get_cred(NFS_KERBSRV, inst, realm, 528 &kcr); 529 } 530 if (kret == KSUCCESS) 531 kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst, 532 realm, 0); 533 534 /* 535 * Fill in the AKN_FULLNAME authenticator and verifier. 536 * Along with the Kerberos ticket, we need to build 537 * the timestamp verifier and encrypt it in CBC mode. 538 */ 539 if (kret == KSUCCESS && 540 ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED) 541 && gettimeofday(&ktv, NULL) == 0) { 542 ncd.ncd_authtype = RPCAUTH_KERB4; 543 ncd.ncd_authstr = (u_char *)&ktick; 544 ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) + 545 3 * NFSX_UNSIGNED; 546 ncd.ncd_verfstr = (u_char *)&kverf; 547 ncd.ncd_verflen = sizeof (kverf); 548 memmove(ncd.ncd_key, kcr.session, 549 sizeof (kcr.session)); 550 kin.t1 = htonl(ktv.tv_sec); 551 kin.t2 = htonl(ktv.tv_usec); 552 kin.w1 = htonl(NFS_KERBTTL); 553 kin.w2 = htonl(NFS_KERBTTL - 1); 554 bzero((caddr_t)kivec, sizeof (kivec)); 555 556 /* 557 * Encrypt kin in CBC mode using the session 558 * key in kcr. 559 */ 560 XXX 561 562 /* 563 * Finally, fill the timestamp verifier into the 564 * authenticator and verifier. 565 */ 566 ktick.kind = htonl(RPCAKN_FULLNAME); 567 kverf.kind = htonl(RPCAKN_FULLNAME); 568 NFS_KERBW1(ktick.kt) = kout.w1; 569 ktick.kt.length = htonl(ktick.kt.length); 570 kverf.verf.t1 = kout.t1; 571 kverf.verf.t2 = kout.t2; 572 kverf.verf.w2 = kout.w2; 573 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; 574 } 575 setreuid(0, 0); 576 #endif /* NFSKERB */ 577 } 578 } 579 exit(0); 580 } 581 582 static int 583 getnfsargs(char *spec, struct nfs_args *nfsargsp) 584 { 585 struct addrinfo hints, *ai_nfs, *ai; 586 #ifdef NFSKERB 587 char host[NI_MAXHOST], serv[NI_MAXSERV]; 588 #endif 589 enum tryret ret; 590 int ecode, speclen, remoteerr; 591 char *hostp, *delimp, *errstr; 592 #ifdef NFSKERB 593 char *cp; 594 #endif 595 size_t len; 596 static char nam[MNAMELEN + 1]; 597 598 if ((delimp = strrchr(spec, ':')) != NULL) { 599 hostp = spec; 600 spec = delimp + 1; 601 } else if ((delimp = strrchr(spec, '@')) != NULL) { 602 warnx("path@server syntax is deprecated, use server:path"); 603 hostp = delimp + 1; 604 } else { 605 warnx("no <host>:<dirpath> nfs-name"); 606 return (0); 607 } 608 *delimp = '\0'; 609 610 /* 611 * If there has been a trailing slash at mounttime it seems 612 * that some mountd implementations fail to remove the mount 613 * entries from their mountlist while unmounting. 614 */ 615 for (speclen = strlen(spec); 616 speclen > 1 && spec[speclen - 1] == '/'; 617 speclen--) 618 spec[speclen - 1] = '\0'; 619 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 620 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); 621 return (0); 622 } 623 /* Make both '@' and ':' notations equal */ 624 if (*hostp != '\0') { 625 len = strlen(hostp); 626 memmove(nam, hostp, len); 627 nam[len] = ':'; 628 memmove(nam + len + 1, spec, speclen); 629 nam[len + speclen + 1] = '\0'; 630 } 631 632 /* 633 * Handle an internet host address and reverse resolve it if 634 * doing Kerberos. 635 */ 636 memset(&hints, 0, sizeof hints); 637 hints.ai_flags = AI_NUMERICHOST; 638 hints.ai_socktype = nfsargsp->sotype; 639 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) == 0) { 640 #ifdef NFSKERB 641 if ((nfsargsp->flags & NFSMNT_KERB)) { 642 hints.ai_flags = 0; 643 if (getnameinfo(ai_nfs->ai_addr, ai_nfs->ai_addrlen, 644 host, sizeof host, serv, sizeof serv, 0) != 0) { 645 warnx("can't reverse resolve net address"); 646 return (0); 647 } 648 hostp = host; 649 } 650 #endif /* NFSKERB */ 651 } else { 652 hints.ai_flags = 0; 653 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) 654 != 0) { 655 if (portspec == NULL) 656 errx(1, "%s: %s", hostp, gai_strerror(ecode)); 657 else 658 errx(1, "%s:%s: %s", hostp, portspec, 659 gai_strerror(ecode)); 660 return (0); 661 } 662 } 663 #ifdef NFSKERB 664 if (nfsargsp->flags & NFSMNT_KERB) { 665 strncpy(inst, hp->h_name, INST_SZ); 666 inst[INST_SZ - 1] = '\0'; 667 if (cp = strchr(inst, '.')) 668 *cp = '\0'; 669 } 670 #endif /* NFSKERB */ 671 672 ret = TRYRET_LOCALERR; 673 for (;;) { 674 /* 675 * Try each entry returned by getaddrinfo(). Note the 676 * occurence of remote errors by setting `remoteerr'. 677 */ 678 remoteerr = 0; 679 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { 680 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr); 681 if (ret == TRYRET_SUCCESS) 682 break; 683 if (ret != TRYRET_LOCALERR) 684 remoteerr = 1; 685 if ((opflags & ISBGRND) == 0) 686 fprintf(stderr, "%s\n", errstr); 687 } 688 if (ret == TRYRET_SUCCESS) 689 break; 690 691 /* Exit if all errors were local. */ 692 if (!remoteerr) 693 exit(1); 694 695 /* 696 * If retrycnt == 0, we are to keep retrying forever. 697 * Otherwise decrement it, and exit if it hits zero. 698 */ 699 if (retrycnt != 0 && --retrycnt == 0) 700 exit(1); 701 702 if ((opflags & (BGRND | ISBGRND)) == BGRND) { 703 warnx("Cannot immediately mount %s:%s, backgrounding", 704 hostp, spec); 705 opflags |= ISBGRND; 706 if (daemon(0, 0) != 0) 707 err(1, "daemon"); 708 } 709 sleep(60); 710 } 711 freeaddrinfo(ai_nfs); 712 nfsargsp->hostname = nam; 713 /* Add mounted filesystem to PATH_MOUNTTAB */ 714 if (!add_mtab(hostp, spec)) 715 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); 716 return (1); 717 } 718 719 /* 720 * Try to set up the NFS arguments according to the address 721 * family, protocol (and possibly port) specified in `ai'. 722 * 723 * Returns TRYRET_SUCCESS if successful, or: 724 * TRYRET_TIMEOUT The server did not respond. 725 * TRYRET_REMOTEERR The server reported an error. 726 * TRYRET_LOCALERR Local failure. 727 * 728 * In all error cases, *errstr will be set to a statically-allocated string 729 * describing the error. 730 */ 731 static enum tryret 732 nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, 733 char *spec, char **errstr) 734 { 735 static char errbuf[256]; 736 struct sockaddr_storage nfs_ss; 737 struct netbuf nfs_nb; 738 struct nfhret nfhret; 739 struct timeval try; 740 struct rpc_err rpcerr; 741 CLIENT *clp; 742 struct netconfig *nconf, *nconf_mnt; 743 const char *netid, *netid_mnt; 744 int doconnect, nfsvers, mntvers; 745 enum clnt_stat status; 746 enum mountmode trymntmode; 747 748 trymntmode = mountmode; 749 errbuf[0] = '\0'; 750 *errstr = errbuf; 751 752 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) { 753 snprintf(errbuf, sizeof errbuf, 754 "af %d sotype %d not supported", ai->ai_family, 755 nfsargsp->sotype); 756 return (TRYRET_LOCALERR); 757 } 758 if ((nconf = getnetconf_cached(netid)) == NULL) { 759 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); 760 return (TRYRET_LOCALERR); 761 } 762 /* The RPCPROG_MNT netid may be different. */ 763 if (mnttcp_ok) { 764 netid_mnt = netid; 765 nconf_mnt = nconf; 766 } else { 767 if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM)) 768 == NULL) { 769 snprintf(errbuf, sizeof errbuf, 770 "af %d sotype SOCK_DGRAM not supported", 771 ai->ai_family); 772 return (TRYRET_LOCALERR); 773 } 774 if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) { 775 snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt, 776 nc_sperror()); 777 return (TRYRET_LOCALERR); 778 } 779 } 780 781 tryagain: 782 if (trymntmode == V2) { 783 nfsvers = 2; 784 mntvers = 1; 785 } else { 786 nfsvers = 3; 787 mntvers = 3; 788 } 789 790 if (portspec != NULL) { 791 /* `ai' contains the complete nfsd sockaddr. */ 792 nfs_nb.buf = ai->ai_addr; 793 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; 794 } else { 795 /* Ask the remote rpcbind. */ 796 nfs_nb.buf = &nfs_ss; 797 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; 798 799 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, 800 hostp)) { 801 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && 802 trymntmode == ANY) { 803 trymntmode = V2; 804 goto tryagain; 805 } 806 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", 807 netid, hostp, spec, 808 clnt_spcreateerror("RPCPROG_NFS")); 809 return (returncode(rpc_createerr.cf_stat, 810 &rpc_createerr.cf_error)); 811 } 812 } 813 814 /* Check that the server (nfsd) responds on the port we have chosen. */ 815 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers, 816 0, 0); 817 if (clp == NULL) { 818 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 819 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); 820 return (returncode(rpc_createerr.cf_stat, 821 &rpc_createerr.cf_error)); 822 } 823 if (nfsargsp->sotype == SOCK_DGRAM && 824 !(nfsargsp->flags & NFSMNT_NOCONN)) { 825 /* 826 * Use connect(), to match what the kernel does. This 827 * catches cases where the server responds from the 828 * wrong source address. 829 */ 830 doconnect = 1; 831 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { 832 clnt_destroy(clp); 833 snprintf(errbuf, sizeof errbuf, 834 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, 835 spec); 836 return (TRYRET_LOCALERR); 837 } 838 } 839 840 try.tv_sec = 10; 841 try.tv_usec = 0; 842 status = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL, 843 (xdrproc_t)xdr_void, NULL, try); 844 if (status != RPC_SUCCESS) { 845 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 846 clnt_destroy(clp); 847 trymntmode = V2; 848 goto tryagain; 849 } 850 clnt_geterr(clp, &rpcerr); 851 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 852 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); 853 clnt_destroy(clp); 854 return (returncode(status, &rpcerr)); 855 } 856 clnt_destroy(clp); 857 858 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */ 859 try.tv_sec = 10; 860 try.tv_usec = 0; 861 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt); 862 if (clp == NULL) { 863 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 864 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); 865 return (returncode(rpc_createerr.cf_stat, 866 &rpc_createerr.cf_error)); 867 } 868 clp->cl_auth = authsys_create_default(); 869 if (nfsargsp->flags & NFSMNT_KERB) 870 nfhret.auth = RPCAUTH_KERB4; 871 else 872 nfhret.auth = RPCAUTH_UNIX; 873 nfhret.vers = mntvers; 874 status = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec, 875 (xdrproc_t)xdr_fh, &nfhret, try); 876 auth_destroy(clp->cl_auth); 877 if (status != RPC_SUCCESS) { 878 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 879 clnt_destroy(clp); 880 trymntmode = V2; 881 goto tryagain; 882 } 883 clnt_geterr(clp, &rpcerr); 884 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 885 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); 886 clnt_destroy(clp); 887 return (returncode(status, &rpcerr)); 888 } 889 clnt_destroy(clp); 890 891 if (nfhret.stat != 0) { 892 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 893 hostp, spec, strerror(nfhret.stat)); 894 return (TRYRET_REMOTEERR); 895 } 896 897 /* 898 * Store the filehandle and server address in nfsargsp, making 899 * sure to copy any locally allocated structures. 900 */ 901 nfsargsp->addrlen = nfs_nb.len; 902 nfsargsp->addr = malloc(nfsargsp->addrlen); 903 nfsargsp->fhsize = nfhret.fhsize; 904 nfsargsp->fh = malloc(nfsargsp->fhsize); 905 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL) 906 err(1, "malloc"); 907 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen); 908 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize); 909 910 if (nfsvers == 3) 911 nfsargsp->flags |= NFSMNT_NFSV3; 912 else 913 nfsargsp->flags &= ~NFSMNT_NFSV3; 914 915 return (TRYRET_SUCCESS); 916 } 917 918 919 /* 920 * Catagorise a RPC return status and error into an `enum tryret' 921 * return code. 922 */ 923 static enum tryret 924 returncode(enum clnt_stat status, struct rpc_err *rpcerr) 925 { 926 switch (status) { 927 case RPC_TIMEDOUT: 928 return (TRYRET_TIMEOUT); 929 case RPC_PMAPFAILURE: 930 case RPC_PROGNOTREGISTERED: 931 case RPC_PROGVERSMISMATCH: 932 /* XXX, these can be local or remote. */ 933 case RPC_CANTSEND: 934 case RPC_CANTRECV: 935 return (TRYRET_REMOTEERR); 936 case RPC_SYSTEMERROR: 937 switch (rpcerr->re_errno) { 938 case ETIMEDOUT: 939 return (TRYRET_TIMEOUT); 940 case ENOMEM: 941 break; 942 default: 943 return (TRYRET_REMOTEERR); 944 } 945 /* FALLTHROUGH */ 946 default: 947 break; 948 } 949 return (TRYRET_LOCALERR); 950 } 951 952 /* 953 * Look up a netid based on an address family and socket type. 954 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. 955 * 956 * XXX there should be a library function for this. 957 */ 958 static const char * 959 netidbytype(int af, int sotype) 960 { 961 struct nc_protos *p; 962 963 for (p = nc_protos; p->netid != NULL; p++) { 964 if (af != p->af || sotype != p->sotype) 965 continue; 966 return (p->netid); 967 } 968 return (NULL); 969 } 970 971 /* 972 * Look up a netconfig entry based on a netid, and cache the result so 973 * that we don't need to remember to call freenetconfigent(). 974 * 975 * Otherwise it behaves just like getnetconfigent(), so nc_*error() 976 * work on failure. 977 */ 978 static struct netconfig * 979 getnetconf_cached(const char *netid) 980 { 981 static struct nc_entry { 982 struct netconfig *nconf; 983 struct nc_entry *next; 984 } *head; 985 struct nc_entry *p; 986 struct netconfig *nconf; 987 988 for (p = head; p != NULL; p = p->next) 989 if (strcmp(netid, p->nconf->nc_netid) == 0) 990 return (p->nconf); 991 992 if ((nconf = getnetconfigent(netid)) == NULL) 993 return (NULL); 994 if ((p = malloc(sizeof(*p))) == NULL) 995 err(1, "malloc"); 996 p->nconf = nconf; 997 p->next = head; 998 head = p; 999 1000 return (p->nconf); 1001 } 1002 1003 /* 1004 * xdr routines for mount rpc's 1005 */ 1006 static int 1007 xdr_dir(XDR *xdrsp, char *dirp) 1008 { 1009 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 1010 } 1011 1012 static int 1013 xdr_fh(XDR *xdrsp, struct nfhret *np) 1014 { 1015 int i; 1016 long auth, authcnt, authfnd = 0; 1017 1018 if (!xdr_u_long(xdrsp, &np->stat)) 1019 return (0); 1020 if (np->stat) 1021 return (1); 1022 switch (np->vers) { 1023 case 1: 1024 np->fhsize = NFSX_V2FH; 1025 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 1026 case 3: 1027 if (!xdr_long(xdrsp, &np->fhsize)) 1028 return (0); 1029 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 1030 return (0); 1031 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 1032 return (0); 1033 if (!xdr_long(xdrsp, &authcnt)) 1034 return (0); 1035 for (i = 0; i < authcnt; i++) { 1036 if (!xdr_long(xdrsp, &auth)) 1037 return (0); 1038 if (auth == np->auth) 1039 authfnd++; 1040 } 1041 /* 1042 * Some servers, such as DEC's OSF/1 return a nil authenticator 1043 * list to indicate RPCAUTH_UNIX. 1044 */ 1045 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 1046 np->stat = EAUTH; 1047 return (1); 1048 }; 1049 return (0); 1050 } 1051 1052 static void 1053 usage(void) 1054 { 1055 fprintf(stderr, "%s\n%s\n%s\n%s\n", 1056 "usage: mount_nfs [-23KNPTUbcdils] [-D deadthresh] [-I readdirsize]", 1057 " [-R retrycnt] [-a maxreadahead]", 1058 " [-g maxgroups] [-m realm] [-o options] [-r readsize]", 1059 " [-t timeout] [-w writesize] [-x retrans] rhost:path node"); 1060 exit(1); 1061 } 1062