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_UNUSED080 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", 1, ALTF_TCP, 1 }, 107 { "resvport", 0, ALTF_RESVPORT, 1 }, 108 { "soft", 0, ALTF_SOFT, 1 }, 109 { "tcp", 0, ALTF_TCP, 1 }, 110 { "udp", 1, ALTF_TCP, 1 }, 111 { "port=", 0, ALTF_PORT, 1 }, 112 { "nfsv2", 0, ALTF_NFSV2, 1 }, 113 { "acregmin=", 0, ALTF_ACREGMIN, 1 }, 114 { "acregmax=", 0, ALTF_ACREGMAX, 1 }, 115 { "acdirmin=", 0, ALTF_ACDIRMIN, 1 }, 116 { "acdirmax=", 0, ALTF_ACDIRMAX, 1 }, 117 MOPT_NULL 118 }; 119 120 struct nfs_args nfsdefargs = { 121 NFS_ARGSVERSION, 122 NULL, 123 sizeof (struct sockaddr_in), 124 0, 125 0, 126 NULL, 127 0, 128 NFSMNT_RESVPORT, 129 NFS_WSIZE, 130 NFS_RSIZE, 131 NFS_READDIRSIZE, 132 10, 133 NFS_RETRANS, 134 NFS_MAXGRPS, 135 NFS_DEFRAHEAD, 136 0, 137 NFS_DEADTHRESH, 138 NULL, 139 /* args version 4 */ 140 NFS_MINATTRTIMO, 141 NFS_MAXATTRTIMO, 142 NFS_MINDIRATTRTIMO, 143 NFS_MAXDIRATTRTIMO, 144 }; 145 146 /* Table for af,sotype -> netid conversions. */ 147 struct nc_protos { 148 const char *netid; 149 int af; 150 int sotype; 151 } nc_protos[] = { 152 {"udp", AF_INET, SOCK_DGRAM}, 153 {"tcp", AF_INET, SOCK_STREAM}, 154 {"udp6", AF_INET6, SOCK_DGRAM}, 155 {"tcp6", AF_INET6, SOCK_STREAM}, 156 {NULL, 0, 0} 157 }; 158 159 struct nfhret { 160 u_long stat; 161 long vers; 162 long auth; 163 long fhsize; 164 u_char nfh[NFSX_V3FHMAX]; 165 }; 166 #define BGRND 1 167 #define ISBGRND 2 168 int retrycnt = -1; 169 int opflags = 0; 170 int nfsproto; 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 = ALTF_TCP; 283 nfsargs = nfsdefargs; 284 nfsargsp = &nfsargs; 285 if (altflags & ALTF_TCP) { 286 nfsproto = IPPROTO_TCP; 287 nfsargsp->sotype = SOCK_STREAM; 288 } else { 289 nfsproto = IPPROTO_UDP; 290 nfsargsp->sotype = SOCK_DGRAM; 291 } 292 while ((c = getopt(argc, argv, 293 "23a:bcdD:g:I:iKlm:No:PR:r:sTt:w:x:U")) != -1) 294 switch (c) { 295 case '2': 296 mountmode = V2; 297 break; 298 case '3': 299 mountmode = V3; 300 break; 301 case 'a': 302 num = strtol(optarg, &p, 10); 303 if (*p || num < 0) 304 errx(1, "illegal -a value -- %s", optarg); 305 nfsargsp->readahead = num; 306 nfsargsp->flags |= NFSMNT_READAHEAD; 307 break; 308 case 'b': 309 opflags |= BGRND; 310 break; 311 case 'c': 312 nfsargsp->flags |= NFSMNT_NOCONN; 313 break; 314 case 'D': 315 num = strtol(optarg, &p, 10); 316 if (*p || num <= 0) 317 errx(1, "illegal -D value -- %s", optarg); 318 nfsargsp->deadthresh = num; 319 nfsargsp->flags |= NFSMNT_DEADTHRESH; 320 break; 321 case 'd': 322 nfsargsp->flags |= NFSMNT_DUMBTIMR; 323 break; 324 #if 0 /* XXXX */ 325 case 'g': 326 num = strtol(optarg, &p, 10); 327 if (*p || num <= 0) 328 errx(1, "illegal -g value -- %s", optarg); 329 set_rpc_maxgrouplist(num); 330 nfsargsp->maxgrouplist = num; 331 nfsargsp->flags |= NFSMNT_MAXGRPS; 332 break; 333 #endif 334 case 'I': 335 num = strtol(optarg, &p, 10); 336 if (*p || num <= 0) 337 errx(1, "illegal -I value -- %s", optarg); 338 nfsargsp->readdirsize = num; 339 nfsargsp->flags |= NFSMNT_READDIRSIZE; 340 break; 341 case 'i': 342 nfsargsp->flags |= NFSMNT_INT; 343 break; 344 #ifdef NFSKERB 345 case 'K': 346 nfsargsp->flags |= NFSMNT_KERB; 347 break; 348 #endif 349 case 'l': 350 nfsargsp->flags |= NFSMNT_RDIRPLUS; 351 break; 352 #ifdef NFSKERB 353 case 'm': 354 strncpy(realm, optarg, REALM_SZ - 1); 355 realm[REALM_SZ - 1] = '\0'; 356 break; 357 #endif 358 case 'N': 359 nfsargsp->flags &= ~NFSMNT_RESVPORT; 360 break; 361 case 'o': 362 altflags = 0; 363 set_flags(&altflags, &nfsargsp->flags, TRUE); 364 if (nfsproto == IPPROTO_TCP) 365 altflags |= ALTF_TCP; 366 if (mountmode == V2) 367 altflags |= ALTF_NFSV2; 368 else if (mountmode == V3) 369 altflags |= ALTF_NFSV3; 370 getmntopts(optarg, mopts, &mntflags, &altflags); 371 set_flags(&altflags, &nfsargsp->flags, FALSE); 372 /* 373 * Handle altflags which don't map directly to 374 * mount flags. 375 */ 376 if(altflags & ALTF_BG) 377 opflags |= BGRND; 378 if (altflags & ALTF_TCP) { 379 nfsproto = IPPROTO_TCP; 380 nfsargsp->sotype = SOCK_STREAM; 381 } else { 382 nfsproto = IPPROTO_UDP; 383 nfsargsp->sotype = SOCK_DGRAM; 384 } 385 if(altflags & ALTF_PORT) { 386 /* 387 * XXX Converting from a string to an int 388 * and back again is silly, and we should 389 * allow /etc/services names. 390 */ 391 asprintf(&portspec, "%d", 392 atoi(strstr(optarg, "port=") + 5)); 393 if (portspec == NULL) 394 err(1, "asprintf"); 395 } 396 mountmode = ANY; 397 if(altflags & ALTF_NFSV2) 398 mountmode = V2; 399 if(altflags & ALTF_NFSV3) 400 mountmode = V3; 401 if(altflags & ALTF_ACREGMIN) 402 nfsargsp->acregmin = atoi(strstr(optarg, 403 "acregmin=") + 9); 404 if(altflags & ALTF_ACREGMAX) 405 nfsargsp->acregmax = atoi(strstr(optarg, 406 "acregmax=") + 9); 407 if(altflags & ALTF_ACDIRMIN) 408 nfsargsp->acdirmin = atoi(strstr(optarg, 409 "acdirmin=") + 9); 410 if(altflags & ALTF_ACDIRMAX) 411 nfsargsp->acdirmax = atoi(strstr(optarg, 412 "acdirmax=") + 9); 413 break; 414 case 'P': 415 /* obsolete for NFSMNT_RESVPORT, now default */ 416 break; 417 case 'R': 418 num = strtol(optarg, &p, 10); 419 if (*p || num < 0) 420 errx(1, "illegal -R value -- %s", optarg); 421 retrycnt = num; 422 break; 423 case 'r': 424 num = strtol(optarg, &p, 10); 425 if (*p || num <= 0) 426 errx(1, "illegal -r value -- %s", optarg); 427 nfsargsp->rsize = num; 428 nfsargsp->flags |= NFSMNT_RSIZE; 429 break; 430 case 's': 431 nfsargsp->flags |= NFSMNT_SOFT; 432 break; 433 case 'T': 434 nfsargsp->sotype = SOCK_STREAM; 435 nfsproto = IPPROTO_TCP; 436 altflags |= ALTF_TCP; 437 break; 438 case 't': 439 num = strtol(optarg, &p, 10); 440 if (*p || num <= 0) 441 errx(1, "illegal -t value -- %s", optarg); 442 nfsargsp->timeo = num; 443 nfsargsp->flags |= NFSMNT_TIMEO; 444 break; 445 case 'w': 446 num = strtol(optarg, &p, 10); 447 if (*p || num <= 0) 448 errx(1, "illegal -w value -- %s", optarg); 449 nfsargsp->wsize = num; 450 nfsargsp->flags |= NFSMNT_WSIZE; 451 break; 452 case 'x': 453 num = strtol(optarg, &p, 10); 454 if (*p || num <= 0) 455 errx(1, "illegal -x value -- %s", optarg); 456 nfsargsp->retrans = num; 457 nfsargsp->flags |= NFSMNT_RETRANS; 458 break; 459 case 'U': 460 nfsargsp->sotype = SOCK_DGRAM; 461 nfsproto = IPPROTO_UDP; 462 altflags &= ~ALTF_TCP; 463 break; 464 default: 465 usage(); 466 break; 467 } 468 argc -= optind; 469 argv += optind; 470 471 if (argc != 2) { 472 usage(); 473 /* NOTREACHED */ 474 } 475 476 spec = *argv++; 477 name = *argv; 478 479 if (retrycnt == -1) 480 /* The default is to keep retrying forever. */ 481 retrycnt = 0; 482 if (!getnfsargs(spec, nfsargsp)) 483 exit(1); 484 485 /* resolve the mountpoint with realpath(3) */ 486 checkpath(name, mntpath); 487 488 error = getvfsbyname("nfs", &vfc); 489 if (error && vfsisloadable("nfs")) { 490 if(vfsload("nfs")) 491 err(EX_OSERR, "vfsload(nfs)"); 492 endvfsent(); /* clear cache */ 493 error = getvfsbyname("nfs", &vfc); 494 } 495 if (error) 496 errx(EX_OSERR, "nfs filesystem is not available"); 497 498 if (mount(vfc.vfc_name, mntpath, mntflags, nfsargsp)) 499 err(1, "%s", mntpath); 500 if (nfsargsp->flags & NFSMNT_KERB) { 501 if ((opflags & ISBGRND) == 0) { 502 if (daemon(0, 0) != 0) 503 err(1, "daemon"); 504 } 505 openlog("mount_nfs", LOG_PID, LOG_DAEMON); 506 nfssvc_flag = NFSSVC_MNTD; 507 ncd.ncd_dirp = mntpath; 508 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { 509 if (errno != ENEEDAUTH) { 510 syslog(LOG_ERR, "nfssvc err %m"); 511 continue; 512 } 513 nfssvc_flag = 514 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; 515 #ifdef NFSKERB 516 /* 517 * Set up as ncd_authuid for the kerberos call. 518 * Must set ruid to ncd_authuid and reset the 519 * ticket name iff ncd_authuid is not the same 520 * as last time, so that the right ticket file 521 * is found. 522 * Get the Kerberos credential structure so that 523 * we have the session key and get a ticket for 524 * this uid. 525 * For more info see the IETF Draft "Authentication 526 * in ONC RPC". 527 */ 528 if (ncd.ncd_authuid != last_ruid) { 529 char buf[512]; 530 sprintf(buf, "%s%d", TKT_ROOT, ncd.ncd_authuid); 531 krb_set_tkt_string(buf); 532 last_ruid = ncd.ncd_authuid; 533 } 534 setreuid(ncd.ncd_authuid, 0); 535 kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr); 536 if (kret == RET_NOTKT) { 537 kret = get_ad_tkt(NFS_KERBSRV, inst, realm, 538 DEFAULT_TKT_LIFE); 539 if (kret == KSUCCESS) 540 kret = krb_get_cred(NFS_KERBSRV, inst, realm, 541 &kcr); 542 } 543 if (kret == KSUCCESS) 544 kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst, 545 realm, 0); 546 547 /* 548 * Fill in the AKN_FULLNAME authenticator and verifier. 549 * Along with the Kerberos ticket, we need to build 550 * the timestamp verifier and encrypt it in CBC mode. 551 */ 552 if (kret == KSUCCESS && 553 ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED) 554 && gettimeofday(&ktv, NULL) == 0) { 555 ncd.ncd_authtype = RPCAUTH_KERB4; 556 ncd.ncd_authstr = (u_char *)&ktick; 557 ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) + 558 3 * NFSX_UNSIGNED; 559 ncd.ncd_verfstr = (u_char *)&kverf; 560 ncd.ncd_verflen = sizeof (kverf); 561 memmove(ncd.ncd_key, kcr.session, 562 sizeof (kcr.session)); 563 kin.t1 = htonl(ktv.tv_sec); 564 kin.t2 = htonl(ktv.tv_usec); 565 kin.w1 = htonl(NFS_KERBTTL); 566 kin.w2 = htonl(NFS_KERBTTL - 1); 567 bzero((caddr_t)kivec, sizeof (kivec)); 568 569 /* 570 * Encrypt kin in CBC mode using the session 571 * key in kcr. 572 */ 573 XXX 574 575 /* 576 * Finally, fill the timestamp verifier into the 577 * authenticator and verifier. 578 */ 579 ktick.kind = htonl(RPCAKN_FULLNAME); 580 kverf.kind = htonl(RPCAKN_FULLNAME); 581 NFS_KERBW1(ktick.kt) = kout.w1; 582 ktick.kt.length = htonl(ktick.kt.length); 583 kverf.verf.t1 = kout.t1; 584 kverf.verf.t2 = kout.t2; 585 kverf.verf.w2 = kout.w2; 586 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; 587 } 588 setreuid(0, 0); 589 #endif /* NFSKERB */ 590 } 591 } 592 exit(0); 593 } 594 595 static int 596 getnfsargs(char *spec, struct nfs_args *nfsargsp) 597 { 598 struct addrinfo hints, *ai_nfs, *ai; 599 #ifdef NFSKERB 600 char host[NI_MAXHOST], serv[NI_MAXSERV]; 601 #endif 602 enum tryret ret; 603 int ecode, speclen, remoteerr; 604 char *hostp, *delimp, *errstr; 605 #ifdef NFSKERB 606 char *cp; 607 #endif 608 size_t len; 609 static char nam[MNAMELEN + 1]; 610 611 if ((delimp = strrchr(spec, ':')) != NULL) { 612 hostp = spec; 613 spec = delimp + 1; 614 } else if ((delimp = strrchr(spec, '@')) != NULL) { 615 warnx("path@server syntax is deprecated, use server:path"); 616 hostp = delimp + 1; 617 } else { 618 warnx("no <host>:<dirpath> nfs-name"); 619 return (0); 620 } 621 *delimp = '\0'; 622 623 /* 624 * If there has been a trailing slash at mounttime it seems 625 * that some mountd implementations fail to remove the mount 626 * entries from their mountlist while unmounting. 627 */ 628 for (speclen = strlen(spec); 629 speclen > 1 && spec[speclen - 1] == '/'; 630 speclen--) 631 spec[speclen - 1] = '\0'; 632 if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { 633 warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG)); 634 return (0); 635 } 636 /* Make both '@' and ':' notations equal */ 637 if (*hostp != '\0') { 638 len = strlen(hostp); 639 memmove(nam, hostp, len); 640 nam[len] = ':'; 641 memmove(nam + len + 1, spec, speclen); 642 nam[len + speclen + 1] = '\0'; 643 } 644 645 /* 646 * Handle an internet host address and reverse resolve it if 647 * doing Kerberos. 648 */ 649 memset(&hints, 0, sizeof hints); 650 hints.ai_flags = AI_NUMERICHOST; 651 hints.ai_socktype = nfsargsp->sotype; 652 if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) == 0) { 653 #ifdef NFSKERB 654 if ((nfsargsp->flags & NFSMNT_KERB)) { 655 hints.ai_flags = 0; 656 if (getnameinfo(ai_nfs->ai_addr, ai_nfs->ai_addrlen, 657 host, sizeof host, serv, sizeof serv, 0) != 0) { 658 warnx("can't reverse resolve net address"); 659 return (0); 660 } 661 hostp = host; 662 } 663 #endif /* NFSKERB */ 664 } else { 665 hints.ai_flags = 0; 666 if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs)) 667 != 0) { 668 if (portspec == NULL) 669 errx(1, "%s: %s", hostp, gai_strerror(ecode)); 670 else 671 errx(1, "%s:%s: %s", hostp, portspec, 672 gai_strerror(ecode)); 673 return (0); 674 } 675 } 676 #ifdef NFSKERB 677 if (nfsargsp->flags & NFSMNT_KERB) { 678 strncpy(inst, hp->h_name, INST_SZ); 679 inst[INST_SZ - 1] = '\0'; 680 if (cp = strchr(inst, '.')) 681 *cp = '\0'; 682 } 683 #endif /* NFSKERB */ 684 685 ret = TRYRET_LOCALERR; 686 for (;;) { 687 /* 688 * Try each entry returned by getaddrinfo(). Note the 689 * occurence of remote errors by setting `remoteerr'. 690 */ 691 remoteerr = 0; 692 for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) { 693 ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr); 694 if (ret == TRYRET_SUCCESS) 695 break; 696 if (ret != TRYRET_LOCALERR) 697 remoteerr = 1; 698 if ((opflags & ISBGRND) == 0) 699 fprintf(stderr, "%s\n", errstr); 700 } 701 if (ret == TRYRET_SUCCESS) 702 break; 703 704 /* Exit if all errors were local. */ 705 if (!remoteerr) 706 exit(1); 707 708 /* 709 * If retrycnt == 0, we are to keep retrying forever. 710 * Otherwise decrement it, and exit if it hits zero. 711 */ 712 if (retrycnt != 0 && --retrycnt == 0) 713 exit(1); 714 715 if ((opflags & (BGRND | ISBGRND)) == BGRND) { 716 warnx("Cannot immediately mount %s:%s, backgrounding", 717 hostp, spec); 718 opflags |= ISBGRND; 719 if (daemon(0, 0) != 0) 720 err(1, "daemon"); 721 } 722 sleep(60); 723 } 724 freeaddrinfo(ai_nfs); 725 nfsargsp->hostname = nam; 726 /* Add mounted filesystem to PATH_MOUNTTAB */ 727 if (!add_mtab(hostp, spec)) 728 warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec); 729 return (1); 730 } 731 732 /* 733 * Try to set up the NFS arguments according to the address 734 * family, protocol (and possibly port) specified in `ai'. 735 * 736 * Returns TRYRET_SUCCESS if successful, or: 737 * TRYRET_TIMEOUT The server did not respond. 738 * TRYRET_REMOTEERR The server reported an error. 739 * TRYRET_LOCALERR Local failure. 740 * 741 * In all error cases, *errstr will be set to a statically-allocated string 742 * describing the error. 743 */ 744 static enum tryret 745 nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp, 746 char *spec, char **errstr) 747 { 748 static char errbuf[256]; 749 struct sockaddr_storage nfs_ss; 750 struct netbuf nfs_nb; 751 struct nfhret nfhret; 752 struct timeval try; 753 struct rpc_err rpcerr; 754 CLIENT *clp; 755 struct netconfig *nconf, *nconf_mnt; 756 const char *netid, *netid_mnt; 757 int doconnect, nfsvers, mntvers; 758 enum clnt_stat status; 759 enum mountmode trymntmode; 760 761 trymntmode = mountmode; 762 errbuf[0] = '\0'; 763 *errstr = errbuf; 764 765 if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) { 766 snprintf(errbuf, sizeof errbuf, 767 "af %d sotype %d not supported", ai->ai_family, 768 nfsargsp->sotype); 769 return (TRYRET_LOCALERR); 770 } 771 if ((nconf = getnetconf_cached(netid)) == NULL) { 772 snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror()); 773 return (TRYRET_LOCALERR); 774 } 775 776 netid_mnt = netid; 777 nconf_mnt = nconf; 778 779 tryagain: 780 if (trymntmode == V2) { 781 nfsvers = 2; 782 mntvers = 1; 783 } else { 784 nfsvers = 3; 785 mntvers = 3; 786 } 787 788 if (portspec != NULL) { 789 /* `ai' contains the complete nfsd sockaddr. */ 790 nfs_nb.buf = ai->ai_addr; 791 nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen; 792 } else { 793 /* Ask the remote rpcbind. */ 794 nfs_nb.buf = &nfs_ss; 795 nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss; 796 797 if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb, 798 hostp)) { 799 if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH && 800 trymntmode == ANY) { 801 trymntmode = V2; 802 goto tryagain; 803 } 804 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", 805 netid, hostp, spec, 806 clnt_spcreateerror("RPCPROG_NFS")); 807 return (returncode(rpc_createerr.cf_stat, 808 &rpc_createerr.cf_error)); 809 } 810 } 811 812 /* Check that the server (nfsd) responds on the port we have chosen. */ 813 clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers, 814 0, 0); 815 if (clp == NULL) { 816 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 817 hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS")); 818 return (returncode(rpc_createerr.cf_stat, 819 &rpc_createerr.cf_error)); 820 } 821 if (nfsargsp->sotype == SOCK_DGRAM && 822 !(nfsargsp->flags & NFSMNT_NOCONN)) { 823 /* 824 * Use connect(), to match what the kernel does. This 825 * catches cases where the server responds from the 826 * wrong source address. 827 */ 828 doconnect = 1; 829 if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) { 830 clnt_destroy(clp); 831 snprintf(errbuf, sizeof errbuf, 832 "[%s] %s:%s: CLSET_CONNECT failed", netid, hostp, 833 spec); 834 return (TRYRET_LOCALERR); 835 } 836 } 837 838 try.tv_sec = 10; 839 try.tv_usec = 0; 840 status = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL, 841 (xdrproc_t)xdr_void, NULL, try); 842 if (status != RPC_SUCCESS) { 843 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 844 clnt_destroy(clp); 845 trymntmode = V2; 846 goto tryagain; 847 } 848 clnt_geterr(clp, &rpcerr); 849 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid, 850 hostp, spec, clnt_sperror(clp, "NFSPROC_NULL")); 851 clnt_destroy(clp); 852 return (returncode(status, &rpcerr)); 853 } 854 clnt_destroy(clp); 855 856 /* Send the RPCMNT_MOUNT RPC to get the root filehandle. */ 857 try.tv_sec = 10; 858 try.tv_usec = 0; 859 clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt); 860 if (clp == NULL) { 861 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 862 hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create")); 863 return (returncode(rpc_createerr.cf_stat, 864 &rpc_createerr.cf_error)); 865 } 866 clp->cl_auth = authsys_create_default(); 867 if (nfsargsp->flags & NFSMNT_KERB) 868 nfhret.auth = RPCAUTH_KERB4; 869 else 870 nfhret.auth = RPCAUTH_UNIX; 871 nfhret.vers = mntvers; 872 status = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec, 873 (xdrproc_t)xdr_fh, &nfhret, try); 874 auth_destroy(clp->cl_auth); 875 if (status != RPC_SUCCESS) { 876 if (status == RPC_PROGVERSMISMATCH && trymntmode == ANY) { 877 clnt_destroy(clp); 878 trymntmode = V2; 879 goto tryagain; 880 } 881 clnt_geterr(clp, &rpcerr); 882 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 883 hostp, spec, clnt_sperror(clp, "RPCPROG_MNT")); 884 clnt_destroy(clp); 885 return (returncode(status, &rpcerr)); 886 } 887 clnt_destroy(clp); 888 889 if (nfhret.stat != 0) { 890 snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt, 891 hostp, spec, strerror(nfhret.stat)); 892 return (TRYRET_REMOTEERR); 893 } 894 895 /* 896 * Store the filehandle and server address in nfsargsp, making 897 * sure to copy any locally allocated structures. 898 */ 899 nfsargsp->addrlen = nfs_nb.len; 900 nfsargsp->addr = malloc(nfsargsp->addrlen); 901 nfsargsp->fhsize = nfhret.fhsize; 902 nfsargsp->fh = malloc(nfsargsp->fhsize); 903 if (nfsargsp->addr == NULL || nfsargsp->fh == NULL) 904 err(1, "malloc"); 905 bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen); 906 bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize); 907 908 if (nfsvers == 3) 909 nfsargsp->flags |= NFSMNT_NFSV3; 910 else 911 nfsargsp->flags &= ~NFSMNT_NFSV3; 912 913 return (TRYRET_SUCCESS); 914 } 915 916 917 /* 918 * Catagorise a RPC return status and error into an `enum tryret' 919 * return code. 920 */ 921 static enum tryret 922 returncode(enum clnt_stat status, struct rpc_err *rpcerr) 923 { 924 switch (status) { 925 case RPC_TIMEDOUT: 926 return (TRYRET_TIMEOUT); 927 case RPC_PMAPFAILURE: 928 case RPC_PROGNOTREGISTERED: 929 case RPC_PROGVERSMISMATCH: 930 /* XXX, these can be local or remote. */ 931 case RPC_CANTSEND: 932 case RPC_CANTRECV: 933 return (TRYRET_REMOTEERR); 934 case RPC_SYSTEMERROR: 935 switch (rpcerr->re_errno) { 936 case ETIMEDOUT: 937 return (TRYRET_TIMEOUT); 938 case ENOMEM: 939 break; 940 default: 941 return (TRYRET_REMOTEERR); 942 } 943 /* FALLTHROUGH */ 944 default: 945 break; 946 } 947 return (TRYRET_LOCALERR); 948 } 949 950 /* 951 * Look up a netid based on an address family and socket type. 952 * `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM. 953 * 954 * XXX there should be a library function for this. 955 */ 956 static const char * 957 netidbytype(int af, int sotype) 958 { 959 struct nc_protos *p; 960 961 for (p = nc_protos; p->netid != NULL; p++) { 962 if (af != p->af || sotype != p->sotype) 963 continue; 964 return (p->netid); 965 } 966 return (NULL); 967 } 968 969 /* 970 * Look up a netconfig entry based on a netid, and cache the result so 971 * that we don't need to remember to call freenetconfigent(). 972 * 973 * Otherwise it behaves just like getnetconfigent(), so nc_*error() 974 * work on failure. 975 */ 976 static struct netconfig * 977 getnetconf_cached(const char *netid) 978 { 979 static struct nc_entry { 980 struct netconfig *nconf; 981 struct nc_entry *next; 982 } *head; 983 struct nc_entry *p; 984 struct netconfig *nconf; 985 986 for (p = head; p != NULL; p = p->next) 987 if (strcmp(netid, p->nconf->nc_netid) == 0) 988 return (p->nconf); 989 990 if ((nconf = getnetconfigent(netid)) == NULL) 991 return (NULL); 992 if ((p = malloc(sizeof(*p))) == NULL) 993 err(1, "malloc"); 994 p->nconf = nconf; 995 p->next = head; 996 head = p; 997 998 return (p->nconf); 999 } 1000 1001 /* 1002 * xdr routines for mount rpc's 1003 */ 1004 static int 1005 xdr_dir(XDR *xdrsp, char *dirp) 1006 { 1007 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 1008 } 1009 1010 static int 1011 xdr_fh(XDR *xdrsp, struct nfhret *np) 1012 { 1013 int i; 1014 long auth, authcnt, authfnd = 0; 1015 1016 if (!xdr_u_long(xdrsp, &np->stat)) 1017 return (0); 1018 if (np->stat) 1019 return (1); 1020 switch (np->vers) { 1021 case 1: 1022 np->fhsize = NFSX_V2FH; 1023 return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH)); 1024 case 3: 1025 if (!xdr_long(xdrsp, &np->fhsize)) 1026 return (0); 1027 if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX) 1028 return (0); 1029 if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize)) 1030 return (0); 1031 if (!xdr_long(xdrsp, &authcnt)) 1032 return (0); 1033 for (i = 0; i < authcnt; i++) { 1034 if (!xdr_long(xdrsp, &auth)) 1035 return (0); 1036 if (auth == np->auth) 1037 authfnd++; 1038 } 1039 /* 1040 * Some servers, such as DEC's OSF/1 return a nil authenticator 1041 * list to indicate RPCAUTH_UNIX. 1042 */ 1043 if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX)) 1044 np->stat = EAUTH; 1045 return (1); 1046 }; 1047 return (0); 1048 } 1049 1050 static void 1051 usage(void) 1052 { 1053 fprintf(stderr, "%s\n%s\n%s\n%s\n", 1054 "usage: mount_nfs [-23KNPTUbcdils] [-D deadthresh] [-I readdirsize]", 1055 " [-R retrycnt] [-a maxreadahead]", 1056 " [-g maxgroups] [-m realm] [-o options] [-r readsize]", 1057 " [-t timeout] [-w writesize] [-x retrans] rhost:path node"); 1058 exit(1); 1059 } 1060