1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Herb Hasler and Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1989, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /*not lint*/ 40 41 #if 0 42 #ifndef lint 43 static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95"; 44 #endif /*not lint*/ 45 #endif 46 47 #include <sys/cdefs.h> 48 #include <sys/param.h> 49 #include <sys/conf.h> 50 #include <sys/fcntl.h> 51 #include <sys/fnv_hash.h> 52 #include <sys/linker.h> 53 #include <sys/module.h> 54 #include <sys/mount.h> 55 #include <sys/queue.h> 56 #include <sys/stat.h> 57 #include <sys/sysctl.h> 58 #include <sys/syslog.h> 59 60 #include <rpc/rpc.h> 61 #include <rpc/rpc_com.h> 62 #include <rpc/pmap_clnt.h> 63 #include <rpc/pmap_prot.h> 64 #include <rpcsvc/mount.h> 65 #include <nfs/nfsproto.h> 66 #include <nfs/nfssvc.h> 67 #include <nfsserver/nfs.h> 68 69 #include <fs/nfs/nfsport.h> 70 71 #include <arpa/inet.h> 72 73 #include <ctype.h> 74 #include <err.h> 75 #include <errno.h> 76 #include <grp.h> 77 #include <libutil.h> 78 #include <limits.h> 79 #include <netdb.h> 80 #include <pwd.h> 81 #include <signal.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <unistd.h> 86 #include "pathnames.h" 87 #include "mntopts.h" 88 89 #ifdef DEBUG 90 #include <stdarg.h> 91 #endif 92 93 /* 94 * Structures for keeping the mount list and export list 95 */ 96 struct mountlist { 97 char ml_host[MNTNAMLEN+1]; 98 char ml_dirp[MNTPATHLEN+1]; 99 100 SLIST_ENTRY(mountlist) next; 101 }; 102 103 struct dirlist { 104 struct dirlist *dp_left; 105 struct dirlist *dp_right; 106 int dp_flag; 107 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 108 char *dp_dirp; 109 }; 110 /* dp_flag bits */ 111 #define DP_DEFSET 0x1 112 #define DP_HOSTSET 0x2 113 114 /* 115 * maproot/mapall credentials. 116 * cr_smallgrps can be used for a group list up to SMALLNGROUPS in size. 117 * Larger group lists are malloc'd/free'd. 118 */ 119 #define SMALLNGROUPS 32 120 struct expcred { 121 uid_t cr_uid; 122 int cr_ngroups; 123 gid_t cr_smallgrps[SMALLNGROUPS]; 124 gid_t *cr_groups; 125 }; 126 127 struct exportlist { 128 struct dirlist *ex_dirl; 129 struct dirlist *ex_defdir; 130 struct grouplist *ex_grphead; 131 int ex_flag; 132 fsid_t ex_fs; 133 char *ex_fsdir; 134 char *ex_indexfile; 135 struct expcred ex_defanon; 136 uint64_t ex_defexflags; 137 int ex_numsecflavors; 138 int ex_secflavors[MAXSECFLAVORS]; 139 int ex_defnumsecflavors; 140 int ex_defsecflavors[MAXSECFLAVORS]; 141 142 SLIST_ENTRY(exportlist) entries; 143 }; 144 /* ex_flag bits */ 145 #define EX_LINKED 0x1 146 #define EX_DONE 0x2 147 #define EX_DEFSET 0x4 148 #define EX_PUBLICFH 0x8 149 150 SLIST_HEAD(exportlisthead, exportlist); 151 152 struct netmsk { 153 struct sockaddr_storage nt_net; 154 struct sockaddr_storage nt_mask; 155 char *nt_name; 156 }; 157 158 union grouptypes { 159 struct addrinfo *gt_addrinfo; 160 struct netmsk gt_net; 161 }; 162 163 struct grouplist { 164 int gr_type; 165 union grouptypes gr_ptr; 166 struct grouplist *gr_next; 167 struct expcred gr_anon; 168 uint64_t gr_exflags; 169 int gr_flag; 170 int gr_numsecflavors; 171 int gr_secflavors[MAXSECFLAVORS]; 172 }; 173 /* Group types */ 174 #define GT_NULL 0x0 175 #define GT_HOST 0x1 176 #define GT_NET 0x2 177 #define GT_DEFAULT 0x3 178 #define GT_IGNORE 0x5 179 180 /* Group flags */ 181 #define GR_FND 0x1 182 183 struct hostlist { 184 int ht_flag; /* Uses DP_xx bits */ 185 struct grouplist *ht_grp; 186 struct hostlist *ht_next; 187 }; 188 189 struct fhreturn { 190 int fhr_flag; 191 int fhr_vers; 192 nfsfh_t fhr_fh; 193 int fhr_numsecflavors; 194 int *fhr_secflavors; 195 }; 196 197 #define GETPORT_MAXTRY 20 /* Max tries to get a port # */ 198 199 /* 200 * How long to delay a reload of exports when there are RPC request(s) 201 * to process, in usec. Must be less than 1second. 202 */ 203 #define RELOADDELAY 250000 204 205 /* Global defs */ 206 static char *add_expdir(struct dirlist **, char *, int); 207 static void add_dlist(struct dirlist **, struct dirlist *, 208 struct grouplist *, int, struct exportlist *, 209 struct expcred *, uint64_t); 210 static void add_mlist(char *, char *); 211 static int check_path_component(const char *, char **); 212 static int check_dirpath(char *, char **); 213 static int check_statfs(const char *, struct statfs *, char **); 214 static int check_options(struct dirlist *); 215 static int checkmask(struct sockaddr *sa); 216 static int chk_host(struct dirlist *, struct sockaddr *, int *, int *, 217 int *, int **); 218 static char *strsep_quote(char **stringp, const char *delim); 219 static int create_service(struct netconfig *nconf); 220 static void complete_service(struct netconfig *nconf, char *port_str); 221 static void clearout_service(void); 222 static void del_mlist(char *hostp, char *dirp); 223 static struct dirlist *dirp_search(struct dirlist *, char *); 224 static int do_export_mount(struct exportlist *, struct statfs *); 225 static int do_mount(struct exportlist *, struct grouplist *, uint64_t, 226 struct expcred *, char *, int, struct statfs *, int, int *); 227 static int do_opt(char **, char **, struct exportlist *, 228 struct grouplist *, int *, uint64_t *, struct expcred *); 229 static struct exportlist *ex_search(fsid_t *, struct exportlisthead *); 230 static struct exportlist *get_exp(void); 231 static void free_dir(struct dirlist *); 232 static void free_exp(struct exportlist *); 233 static void free_grp(struct grouplist *); 234 static void free_host(struct hostlist *); 235 static void free_v4rootexp(void); 236 static void get_exportlist_one(int); 237 static void get_exportlist(int); 238 static void insert_exports(struct exportlist *, struct exportlisthead *); 239 static void free_exports(struct exportlisthead *); 240 static void read_exportfile(int); 241 static int compare_nmount_exportlist(struct iovec *, int, char *); 242 static int compare_export(struct exportlist *, struct exportlist *); 243 static int compare_cred(struct expcred *, struct expcred *); 244 static int compare_secflavor(int *, int *, int); 245 static void delete_export(struct iovec *, int, struct statfs *, char *); 246 static int get_host(char *, struct grouplist *, struct grouplist *); 247 static struct hostlist *get_ht(void); 248 static int get_line(void); 249 static void get_mountlist(void); 250 static int get_net(char *, struct netmsk *, int); 251 static void getexp_err(struct exportlist *, struct grouplist *, const char *); 252 static struct grouplist *get_grp(void); 253 static void hang_dirp(struct dirlist *, struct grouplist *, 254 struct exportlist *, int, struct expcred *, uint64_t); 255 static void huphandler(int sig); 256 static int makemask(struct sockaddr_storage *ssp, int bitlen); 257 static void mntsrv(struct svc_req *, SVCXPRT *); 258 static void nextfield(char **, char **); 259 static void out_of_mem(void); 260 static void parsecred(char *, struct expcred *); 261 static int parsesec(char *, struct exportlist *); 262 static int put_exlist(struct dirlist *, XDR *, struct dirlist *, 263 int *, int); 264 static void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 265 static int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 266 struct sockaddr *samask); 267 static int scan_tree(struct dirlist *, struct sockaddr *); 268 static void usage(void); 269 static int xdr_dir(XDR *, char *); 270 static int xdr_explist(XDR *, caddr_t); 271 static int xdr_explist_brief(XDR *, caddr_t); 272 static int xdr_explist_common(XDR *, caddr_t, int); 273 static int xdr_fhs(XDR *, caddr_t); 274 static int xdr_mlist(XDR *, caddr_t); 275 static void terminate(int); 276 static void cp_cred(struct expcred *, struct expcred *); 277 278 #define EXPHASH(f) (fnv_32_buf((f), sizeof(fsid_t), 0) % exphashsize) 279 static struct exportlisthead *exphead = NULL; 280 static struct exportlisthead *oldexphead = NULL; 281 static int exphashsize = 0; 282 static SLIST_HEAD(, mountlist) mlhead = SLIST_HEAD_INITIALIZER(&mlhead); 283 static char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 284 static char **exnames; 285 static char **hosts = NULL; 286 static int force_v2 = 0; 287 static int resvport_only = 1; 288 static int nhosts = 0; 289 static int dir_only = 1; 290 static int dolog = 0; 291 static _Atomic(int) got_sighup = 0; 292 static int xcreated = 0; 293 294 static char *svcport_str = NULL; 295 static int mallocd_svcport = 0; 296 static int *sock_fd; 297 static int sock_fdcnt; 298 static int sock_fdpos; 299 static int suspend_nfsd = 0; 300 301 static int opt_flags; 302 static int have_v6 = 1; 303 304 static int v4root_phase = 0; 305 static char v4root_dirpath[PATH_MAX + 1]; 306 static struct exportlist *v4root_ep = NULL; 307 static int has_publicfh = 0; 308 static int has_set_publicfh = 0; 309 310 static struct pidfh *pfh = NULL; 311 /* Bits for opt_flags above */ 312 #define OP_MAPROOT 0x01 313 #define OP_MAPALL 0x02 314 /* 0x4 free */ 315 #define OP_MASK 0x08 316 #define OP_NET 0x10 317 #define OP_ALLDIRS 0x40 318 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 319 #define OP_QUIET 0x100 320 #define OP_MASKLEN 0x200 321 #define OP_SEC 0x400 322 #define OP_CLASSMASK 0x800 /* mask not specified, is Class A/B/C default */ 323 324 #ifdef DEBUG 325 static int debug = 1; 326 static void SYSLOG(int, const char *, ...) __printflike(2, 3); 327 #define syslog SYSLOG 328 #else 329 static int debug = 0; 330 #endif 331 332 /* 333 * The LOGDEBUG() syslog() calls are always compiled into the daemon. 334 * To enable them, create a file at _PATH_MOUNTDDEBUG. This file can be empty. 335 * To disable the logging, just delete the file at _PATH_MOUNTDDEBUG. 336 */ 337 static int logdebug = 0; 338 #define LOGDEBUG(format, ...) \ 339 (logdebug ? syslog(LOG_DEBUG, format, ## __VA_ARGS__) : 0) 340 341 /* 342 * Similar to strsep(), but it allows for quoted strings 343 * and escaped characters. 344 * 345 * It returns the string (or NULL, if *stringp is NULL), 346 * which is a de-quoted version of the string if necessary. 347 * 348 * It modifies *stringp in place. 349 */ 350 static char * 351 strsep_quote(char **stringp, const char *delim) 352 { 353 char *srcptr, *dstptr, *retval; 354 char quot = 0; 355 356 if (stringp == NULL || *stringp == NULL) 357 return (NULL); 358 359 srcptr = dstptr = retval = *stringp; 360 361 while (*srcptr) { 362 /* 363 * We're looking for several edge cases here. 364 * First: if we're in quote state (quot != 0), 365 * then we ignore the delim characters, but otherwise 366 * process as normal, unless it is the quote character. 367 * Second: if the current character is a backslash, 368 * we take the next character as-is, without checking 369 * for delim, quote, or backslash. Exception: if the 370 * next character is a NUL, that's the end of the string. 371 * Third: if the character is a quote character, we toggle 372 * quote state. 373 * Otherwise: check the current character for NUL, or 374 * being in delim, and end the string if either is true. 375 */ 376 if (*srcptr == '\\') { 377 srcptr++; 378 /* 379 * The edge case here is if the next character 380 * is NUL, we want to stop processing. But if 381 * it's not NUL, then we simply want to copy it. 382 */ 383 if (*srcptr) { 384 *dstptr++ = *srcptr++; 385 } 386 continue; 387 } 388 if (quot == 0 && (*srcptr == '\'' || *srcptr == '"')) { 389 quot = *srcptr++; 390 continue; 391 } 392 if (quot && *srcptr == quot) { 393 /* End of the quoted part */ 394 quot = 0; 395 srcptr++; 396 continue; 397 } 398 if (!quot && strchr(delim, *srcptr)) 399 break; 400 *dstptr++ = *srcptr++; 401 } 402 403 *stringp = (*srcptr == '\0') ? NULL : srcptr + 1; 404 *dstptr = 0; /* Terminate the string */ 405 return (retval); 406 } 407 408 /* 409 * Mountd server for NFS mount protocol as described in: 410 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 411 * The optional arguments are the exports file name 412 * default: _PATH_EXPORTS 413 * and "-n" to allow nonroot mount. 414 */ 415 int 416 main(int argc, char **argv) 417 { 418 fd_set readfds; 419 struct netconfig *nconf; 420 char *endptr, **hosts_bak; 421 void *nc_handle; 422 pid_t otherpid; 423 in_port_t svcport; 424 int c, k, s; 425 int maxrec = RPC_MAXDATASIZE; 426 int attempt_cnt, port_len, port_pos, ret; 427 char **port_list; 428 uint64_t curtime, nexttime; 429 struct timeval tv; 430 struct timespec tp; 431 sigset_t sig_mask, sighup_mask; 432 int enable_rpcbind; 433 434 enable_rpcbind = 1; 435 /* Check that another mountd isn't already running. */ 436 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 437 if (pfh == NULL) { 438 if (errno == EEXIST) 439 errx(1, "mountd already running, pid: %d.", otherpid); 440 warn("cannot open or create pidfile"); 441 } 442 443 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 444 if (s < 0) 445 have_v6 = 0; 446 else 447 close(s); 448 449 while ((c = getopt(argc, argv, "2deh:lnp:RrS")) != -1) 450 switch (c) { 451 case '2': 452 force_v2 = 1; 453 break; 454 case 'e': 455 /* now a no-op, since this is the default */ 456 break; 457 case 'n': 458 resvport_only = 0; 459 break; 460 case 'R': 461 /* Do not support Mount protocol */ 462 enable_rpcbind = 0; 463 break; 464 case 'r': 465 dir_only = 0; 466 break; 467 case 'd': 468 debug = debug ? 0 : 1; 469 break; 470 case 'l': 471 dolog = 1; 472 break; 473 case 'p': 474 endptr = NULL; 475 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 476 if (endptr == NULL || *endptr != '\0' || 477 svcport == 0 || svcport >= IPPORT_MAX) 478 usage(); 479 svcport_str = strdup(optarg); 480 break; 481 case 'h': 482 ++nhosts; 483 hosts_bak = hosts; 484 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 485 if (hosts_bak == NULL) { 486 if (hosts != NULL) { 487 for (k = 0; k < nhosts; k++) 488 free(hosts[k]); 489 free(hosts); 490 out_of_mem(); 491 } 492 } 493 hosts = hosts_bak; 494 hosts[nhosts - 1] = strdup(optarg); 495 if (hosts[nhosts - 1] == NULL) { 496 for (k = 0; k < (nhosts - 1); k++) 497 free(hosts[k]); 498 free(hosts); 499 out_of_mem(); 500 } 501 break; 502 case 'S': 503 suspend_nfsd = 1; 504 break; 505 default: 506 usage(); 507 } 508 if (enable_rpcbind == 0) { 509 if (svcport_str != NULL) { 510 warnx("-p option not compatible with -R, ignored"); 511 free(svcport_str); 512 svcport_str = NULL; 513 } 514 if (nhosts > 0) { 515 warnx("-h option not compatible with -R, ignored"); 516 for (k = 0; k < nhosts; k++) 517 free(hosts[k]); 518 free(hosts); 519 hosts = NULL; 520 nhosts = 0; 521 } 522 } 523 524 if (modfind("nfsd") < 0) { 525 /* Not present in kernel, try loading it */ 526 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 527 errx(1, "NFS server is not available"); 528 } 529 530 argc -= optind; 531 argv += optind; 532 if (argc > 0) 533 exnames = argv; 534 else 535 exnames = exnames_default; 536 openlog("mountd", LOG_PID, LOG_DAEMON); 537 if (debug) 538 warnx("getting export list"); 539 get_exportlist(0); 540 if (debug) 541 warnx("getting mount list"); 542 get_mountlist(); 543 if (debug) 544 warnx("here we go"); 545 if (debug == 0) { 546 daemon(0, 0); 547 signal(SIGINT, SIG_IGN); 548 signal(SIGQUIT, SIG_IGN); 549 } 550 signal(SIGHUP, huphandler); 551 signal(SIGTERM, terminate); 552 signal(SIGPIPE, SIG_IGN); 553 554 pidfile_write(pfh); 555 556 if (enable_rpcbind != 0) { 557 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 558 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 559 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 560 561 if (!resvport_only) { 562 if (sysctlbyname("vfs.nfsd.nfs_privport", NULL, NULL, 563 &resvport_only, sizeof(resvport_only)) != 0 && 564 errno != ENOENT) { 565 syslog(LOG_ERR, "sysctl: %m"); 566 exit(1); 567 } 568 } 569 570 /* 571 * If no hosts were specified, add a wildcard entry to bind to 572 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added 573 * to the list. 574 */ 575 if (nhosts == 0) { 576 hosts = malloc(sizeof(char *)); 577 if (hosts == NULL) 578 out_of_mem(); 579 hosts[0] = "*"; 580 nhosts = 1; 581 } else { 582 hosts_bak = hosts; 583 if (have_v6) { 584 hosts_bak = realloc(hosts, (nhosts + 2) * 585 sizeof(char *)); 586 if (hosts_bak == NULL) { 587 for (k = 0; k < nhosts; k++) 588 free(hosts[k]); 589 free(hosts); 590 out_of_mem(); 591 } else 592 hosts = hosts_bak; 593 nhosts += 2; 594 hosts[nhosts - 2] = "::1"; 595 } else { 596 hosts_bak = realloc(hosts, (nhosts + 1) * 597 sizeof(char *)); 598 if (hosts_bak == NULL) { 599 for (k = 0; k < nhosts; k++) 600 free(hosts[k]); 601 free(hosts); 602 out_of_mem(); 603 } else { 604 nhosts += 1; 605 hosts = hosts_bak; 606 } 607 } 608 609 hosts[nhosts - 1] = "127.0.0.1"; 610 } 611 } 612 613 attempt_cnt = 1; 614 sock_fdcnt = 0; 615 sock_fd = NULL; 616 port_list = NULL; 617 port_len = 0; 618 if (enable_rpcbind != 0) { 619 nc_handle = setnetconfig(); 620 while ((nconf = getnetconfig(nc_handle))) { 621 if (nconf->nc_flag & NC_VISIBLE) { 622 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 623 "inet6") == 0) { 624 /* DO NOTHING */ 625 } else { 626 ret = create_service(nconf); 627 if (ret == 1) 628 /* Ignore this call */ 629 continue; 630 if (ret < 0) { 631 /* 632 * Failed to bind port, so close 633 * off all sockets created and 634 * try again if the port# was 635 * dynamically assigned via 636 * bind(2). 637 */ 638 clearout_service(); 639 if (mallocd_svcport != 0 && 640 attempt_cnt < 641 GETPORT_MAXTRY) { 642 free(svcport_str); 643 svcport_str = NULL; 644 mallocd_svcport = 0; 645 } else { 646 errno = EADDRINUSE; 647 syslog(LOG_ERR, 648 "bindresvport_sa:" 649 " %m"); 650 exit(1); 651 } 652 653 /* 654 * Start over at the first 655 * service. 656 */ 657 free(sock_fd); 658 sock_fdcnt = 0; 659 sock_fd = NULL; 660 nc_handle = setnetconfig(); 661 attempt_cnt++; 662 } else if (mallocd_svcport != 0 && 663 attempt_cnt == GETPORT_MAXTRY) { 664 /* 665 * For the last attempt, allow 666 * different port #s for each 667 * nconf by saving the 668 * svcport_str setting it back 669 * to NULL. 670 */ 671 port_list = realloc(port_list, 672 (port_len + 1) * 673 sizeof(char *)); 674 if (port_list == NULL) 675 out_of_mem(); 676 port_list[port_len++] = 677 svcport_str; 678 svcport_str = NULL; 679 mallocd_svcport = 0; 680 } 681 } 682 } 683 } 684 685 /* 686 * Successfully bound the ports, so call complete_service() to 687 * do the rest of the setup on the service(s). 688 */ 689 sock_fdpos = 0; 690 port_pos = 0; 691 nc_handle = setnetconfig(); 692 while ((nconf = getnetconfig(nc_handle))) { 693 if (nconf->nc_flag & NC_VISIBLE) { 694 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 695 "inet6") == 0) { 696 /* DO NOTHING */ 697 } else if (port_list != NULL) { 698 if (port_pos >= port_len) { 699 syslog(LOG_ERR, "too many" 700 " port#s"); 701 exit(1); 702 } 703 complete_service(nconf, 704 port_list[port_pos++]); 705 } else 706 complete_service(nconf, svcport_str); 707 } 708 } 709 endnetconfig(nc_handle); 710 free(sock_fd); 711 if (port_list != NULL) { 712 for (port_pos = 0; port_pos < port_len; port_pos++) 713 free(port_list[port_pos]); 714 free(port_list); 715 } 716 717 if (xcreated == 0) { 718 syslog(LOG_ERR, "could not create any services"); 719 exit(1); 720 } 721 } 722 723 /* Expand svc_run() here so that we can call get_exportlist(). */ 724 curtime = nexttime = 0; 725 sigemptyset(&sighup_mask); 726 sigaddset(&sighup_mask, SIGHUP); 727 for (;;) { 728 clock_gettime(CLOCK_MONOTONIC, &tp); 729 curtime = tp.tv_sec; 730 curtime = curtime * 1000000 + tp.tv_nsec / 1000; 731 sigprocmask(SIG_BLOCK, &sighup_mask, &sig_mask); 732 if (got_sighup && curtime >= nexttime) { 733 got_sighup = 0; 734 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 735 get_exportlist(1); 736 clock_gettime(CLOCK_MONOTONIC, &tp); 737 nexttime = tp.tv_sec; 738 nexttime = nexttime * 1000000 + tp.tv_nsec / 1000 + 739 RELOADDELAY; 740 } else 741 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 742 743 /* 744 * If a reload is pending, poll for received request(s), 745 * otherwise set a RELOADDELAY timeout, since a SIGHUP 746 * could be processed between the got_sighup test and 747 * the select() system call. 748 */ 749 tv.tv_sec = 0; 750 if (got_sighup) 751 tv.tv_usec = 0; 752 else 753 tv.tv_usec = RELOADDELAY; 754 if (enable_rpcbind != 0) { 755 readfds = svc_fdset; 756 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, 757 &tv)) { 758 case -1: 759 if (errno == EINTR) { 760 /* Allow a reload now. */ 761 nexttime = 0; 762 continue; 763 } 764 syslog(LOG_ERR, "mountd died: select: %m"); 765 exit(1); 766 case 0: 767 /* Allow a reload now. */ 768 nexttime = 0; 769 continue; 770 default: 771 svc_getreqset(&readfds); 772 } 773 } else { 774 /* Simply wait for a signal. */ 775 sigsuspend(&sig_mask); 776 } 777 } 778 } 779 780 /* 781 * This routine creates and binds sockets on the appropriate 782 * addresses. It gets called one time for each transport. 783 * It returns 0 upon success, 1 for ignore the call and -1 to indicate 784 * bind failed with EADDRINUSE. 785 * Any file descriptors that have been created are stored in sock_fd and 786 * the total count of them is maintained in sock_fdcnt. 787 */ 788 static int 789 create_service(struct netconfig *nconf) 790 { 791 struct addrinfo hints, *res = NULL; 792 struct sockaddr_in *sin; 793 struct sockaddr_in6 *sin6; 794 struct __rpc_sockinfo si; 795 int aicode; 796 int fd; 797 int nhostsbak; 798 int one = 1; 799 int r; 800 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 801 int mallocd_res; 802 803 if ((nconf->nc_semantics != NC_TPI_CLTS) && 804 (nconf->nc_semantics != NC_TPI_COTS) && 805 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 806 return (1); /* not my type */ 807 808 /* 809 * XXX - using RPC library internal functions. 810 */ 811 if (!__rpc_nconf2sockinfo(nconf, &si)) { 812 syslog(LOG_ERR, "cannot get information for %s", 813 nconf->nc_netid); 814 return (1); 815 } 816 817 /* Get mountd's address on this transport */ 818 memset(&hints, 0, sizeof hints); 819 hints.ai_family = si.si_af; 820 hints.ai_socktype = si.si_socktype; 821 hints.ai_protocol = si.si_proto; 822 823 /* 824 * Bind to specific IPs if asked to 825 */ 826 nhostsbak = nhosts; 827 while (nhostsbak > 0) { 828 --nhostsbak; 829 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int)); 830 if (sock_fd == NULL) 831 out_of_mem(); 832 sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */ 833 mallocd_res = 0; 834 835 hints.ai_flags = AI_PASSIVE; 836 837 /* 838 * XXX - using RPC library internal functions. 839 */ 840 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 841 int non_fatal = 0; 842 if (errno == EAFNOSUPPORT && 843 nconf->nc_semantics != NC_TPI_CLTS) 844 non_fatal = 1; 845 846 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 847 "cannot create socket for %s", nconf->nc_netid); 848 if (non_fatal != 0) 849 continue; 850 exit(1); 851 } 852 853 switch (hints.ai_family) { 854 case AF_INET: 855 if (inet_pton(AF_INET, hosts[nhostsbak], 856 host_addr) == 1) { 857 hints.ai_flags |= AI_NUMERICHOST; 858 } else { 859 /* 860 * Skip if we have an AF_INET6 address. 861 */ 862 if (inet_pton(AF_INET6, hosts[nhostsbak], 863 host_addr) == 1) { 864 close(fd); 865 continue; 866 } 867 } 868 break; 869 case AF_INET6: 870 if (inet_pton(AF_INET6, hosts[nhostsbak], 871 host_addr) == 1) { 872 hints.ai_flags |= AI_NUMERICHOST; 873 } else { 874 /* 875 * Skip if we have an AF_INET address. 876 */ 877 if (inet_pton(AF_INET, hosts[nhostsbak], 878 host_addr) == 1) { 879 close(fd); 880 continue; 881 } 882 } 883 884 /* 885 * We're doing host-based access checks here, so don't 886 * allow v4-in-v6 to confuse things. The kernel will 887 * disable it by default on NFS sockets too. 888 */ 889 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 890 sizeof one) < 0) { 891 syslog(LOG_ERR, 892 "can't disable v4-in-v6 on IPv6 socket"); 893 exit(1); 894 } 895 break; 896 default: 897 break; 898 } 899 900 /* 901 * If no hosts were specified, just bind to INADDR_ANY 902 */ 903 if (strcmp("*", hosts[nhostsbak]) == 0) { 904 if (svcport_str == NULL) { 905 res = malloc(sizeof(struct addrinfo)); 906 if (res == NULL) 907 out_of_mem(); 908 mallocd_res = 1; 909 res->ai_flags = hints.ai_flags; 910 res->ai_family = hints.ai_family; 911 res->ai_protocol = hints.ai_protocol; 912 switch (res->ai_family) { 913 case AF_INET: 914 sin = malloc(sizeof(struct sockaddr_in)); 915 if (sin == NULL) 916 out_of_mem(); 917 sin->sin_family = AF_INET; 918 sin->sin_port = htons(0); 919 sin->sin_addr.s_addr = htonl(INADDR_ANY); 920 res->ai_addr = (struct sockaddr*) sin; 921 res->ai_addrlen = (socklen_t) 922 sizeof(struct sockaddr_in); 923 break; 924 case AF_INET6: 925 sin6 = malloc(sizeof(struct sockaddr_in6)); 926 if (sin6 == NULL) 927 out_of_mem(); 928 sin6->sin6_family = AF_INET6; 929 sin6->sin6_port = htons(0); 930 sin6->sin6_addr = in6addr_any; 931 res->ai_addr = (struct sockaddr*) sin6; 932 res->ai_addrlen = (socklen_t) 933 sizeof(struct sockaddr_in6); 934 break; 935 default: 936 syslog(LOG_ERR, "bad addr fam %d", 937 res->ai_family); 938 exit(1); 939 } 940 } else { 941 if ((aicode = getaddrinfo(NULL, svcport_str, 942 &hints, &res)) != 0) { 943 syslog(LOG_ERR, 944 "cannot get local address for %s: %s", 945 nconf->nc_netid, 946 gai_strerror(aicode)); 947 close(fd); 948 continue; 949 } 950 } 951 } else { 952 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 953 &hints, &res)) != 0) { 954 syslog(LOG_ERR, 955 "cannot get local address for %s: %s", 956 nconf->nc_netid, gai_strerror(aicode)); 957 close(fd); 958 continue; 959 } 960 } 961 962 /* Store the fd. */ 963 sock_fd[sock_fdcnt - 1] = fd; 964 965 /* Now, attempt the bind. */ 966 r = bindresvport_sa(fd, res->ai_addr); 967 if (r != 0) { 968 if (errno == EADDRINUSE && mallocd_svcport != 0) { 969 if (mallocd_res != 0) { 970 free(res->ai_addr); 971 free(res); 972 } else 973 freeaddrinfo(res); 974 return (-1); 975 } 976 syslog(LOG_ERR, "bindresvport_sa: %m"); 977 exit(1); 978 } 979 980 if (svcport_str == NULL) { 981 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 982 if (svcport_str == NULL) 983 out_of_mem(); 984 mallocd_svcport = 1; 985 986 if (getnameinfo(res->ai_addr, 987 res->ai_addr->sa_len, NULL, NI_MAXHOST, 988 svcport_str, NI_MAXSERV * sizeof(char), 989 NI_NUMERICHOST | NI_NUMERICSERV)) 990 errx(1, "Cannot get port number"); 991 } 992 if (mallocd_res != 0) { 993 free(res->ai_addr); 994 free(res); 995 } else 996 freeaddrinfo(res); 997 res = NULL; 998 } 999 return (0); 1000 } 1001 1002 /* 1003 * Called after all the create_service() calls have succeeded, to complete 1004 * the setup and registration. 1005 */ 1006 static void 1007 complete_service(struct netconfig *nconf, char *port_str) 1008 { 1009 struct addrinfo hints, *res = NULL; 1010 struct __rpc_sockinfo si; 1011 struct netbuf servaddr; 1012 SVCXPRT *transp = NULL; 1013 int aicode, fd, nhostsbak; 1014 int registered = 0; 1015 1016 if ((nconf->nc_semantics != NC_TPI_CLTS) && 1017 (nconf->nc_semantics != NC_TPI_COTS) && 1018 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 1019 return; /* not my type */ 1020 1021 /* 1022 * XXX - using RPC library internal functions. 1023 */ 1024 if (!__rpc_nconf2sockinfo(nconf, &si)) { 1025 syslog(LOG_ERR, "cannot get information for %s", 1026 nconf->nc_netid); 1027 return; 1028 } 1029 1030 nhostsbak = nhosts; 1031 while (nhostsbak > 0) { 1032 --nhostsbak; 1033 if (sock_fdpos >= sock_fdcnt) { 1034 /* Should never happen. */ 1035 syslog(LOG_ERR, "Ran out of socket fd's"); 1036 return; 1037 } 1038 fd = sock_fd[sock_fdpos++]; 1039 if (fd < 0) 1040 continue; 1041 1042 /* 1043 * Using -1 tells listen(2) to use 1044 * kern.ipc.soacceptqueue for the backlog. 1045 */ 1046 if (nconf->nc_semantics != NC_TPI_CLTS) 1047 listen(fd, -1); 1048 1049 if (nconf->nc_semantics == NC_TPI_CLTS ) 1050 transp = svc_dg_create(fd, 0, 0); 1051 else 1052 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 1053 RPC_MAXDATASIZE); 1054 1055 if (transp != (SVCXPRT *) NULL) { 1056 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS, mntsrv, 1057 NULL)) 1058 syslog(LOG_ERR, 1059 "can't register %s MOUNTVERS service", 1060 nconf->nc_netid); 1061 if (!force_v2) { 1062 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS3, 1063 mntsrv, NULL)) 1064 syslog(LOG_ERR, 1065 "can't register %s MOUNTVERS3 service", 1066 nconf->nc_netid); 1067 } 1068 } else 1069 syslog(LOG_WARNING, "can't create %s services", 1070 nconf->nc_netid); 1071 1072 if (registered == 0) { 1073 registered = 1; 1074 memset(&hints, 0, sizeof hints); 1075 hints.ai_flags = AI_PASSIVE; 1076 hints.ai_family = si.si_af; 1077 hints.ai_socktype = si.si_socktype; 1078 hints.ai_protocol = si.si_proto; 1079 1080 if ((aicode = getaddrinfo(NULL, port_str, &hints, 1081 &res)) != 0) { 1082 syslog(LOG_ERR, "cannot get local address: %s", 1083 gai_strerror(aicode)); 1084 exit(1); 1085 } 1086 1087 servaddr.buf = malloc(res->ai_addrlen); 1088 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 1089 servaddr.len = res->ai_addrlen; 1090 1091 rpcb_set(MOUNTPROG, MOUNTVERS, nconf, &servaddr); 1092 rpcb_set(MOUNTPROG, MOUNTVERS3, nconf, &servaddr); 1093 1094 xcreated++; 1095 freeaddrinfo(res); 1096 } 1097 } /* end while */ 1098 } 1099 1100 /* 1101 * Clear out sockets after a failure to bind one of them, so that the 1102 * cycle of socket creation/binding can start anew. 1103 */ 1104 static void 1105 clearout_service(void) 1106 { 1107 int i; 1108 1109 for (i = 0; i < sock_fdcnt; i++) { 1110 if (sock_fd[i] >= 0) { 1111 shutdown(sock_fd[i], SHUT_RDWR); 1112 close(sock_fd[i]); 1113 } 1114 } 1115 } 1116 1117 static void 1118 usage(void) 1119 { 1120 fprintf(stderr, 1121 "usage: mountd [-2] [-d] [-e] [-l] [-n] [-p <port>] [-r] " 1122 "[-S] [-h <bindip>] [export_file ...]\n"); 1123 exit(1); 1124 } 1125 1126 /* 1127 * The mount rpc service 1128 */ 1129 void 1130 mntsrv(struct svc_req *rqstp, SVCXPRT *transp) 1131 { 1132 struct exportlist *ep; 1133 struct dirlist *dp; 1134 struct fhreturn fhr; 1135 struct stat stb; 1136 struct statfs fsb; 1137 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 1138 int lookup_failed = 1; 1139 struct sockaddr *saddr; 1140 u_short sport; 1141 char rpcpath[MNTPATHLEN + 1], dirpath[MAXPATHLEN]; 1142 int defset, hostset; 1143 long bad = 0; 1144 sigset_t sighup_mask; 1145 int numsecflavors, *secflavorsp; 1146 1147 sigemptyset(&sighup_mask); 1148 sigaddset(&sighup_mask, SIGHUP); 1149 saddr = svc_getrpccaller(transp)->buf; 1150 switch (saddr->sa_family) { 1151 case AF_INET6: 1152 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 1153 break; 1154 case AF_INET: 1155 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 1156 break; 1157 default: 1158 syslog(LOG_ERR, "request from unknown address family"); 1159 return; 1160 } 1161 switch (rqstp->rq_proc) { 1162 case MOUNTPROC_MNT: 1163 case MOUNTPROC_UMNT: 1164 case MOUNTPROC_UMNTALL: 1165 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, 1166 sizeof host, NULL, 0, 0); 1167 } 1168 getnameinfo(saddr, saddr->sa_len, numerichost, 1169 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 1170 switch (rqstp->rq_proc) { 1171 case NULLPROC: 1172 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 1173 syslog(LOG_ERR, "can't send reply"); 1174 return; 1175 case MOUNTPROC_MNT: 1176 if (sport >= IPPORT_RESERVED && resvport_only) { 1177 syslog(LOG_NOTICE, 1178 "mount request from %s from unprivileged port", 1179 numerichost); 1180 svcerr_weakauth(transp); 1181 return; 1182 } 1183 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1184 syslog(LOG_NOTICE, "undecodable mount request from %s", 1185 numerichost); 1186 svcerr_decode(transp); 1187 return; 1188 } 1189 1190 /* 1191 * Get the real pathname and make sure it is a directory 1192 * or a regular file if the -r option was specified 1193 * and it exists. 1194 */ 1195 if (realpath(rpcpath, dirpath) == NULL || 1196 stat(dirpath, &stb) < 0 || 1197 statfs(dirpath, &fsb) < 0) { 1198 chdir("/"); /* Just in case realpath doesn't */ 1199 syslog(LOG_NOTICE, 1200 "mount request from %s for non existent path %s", 1201 numerichost, dirpath); 1202 if (debug) 1203 warnx("stat failed on %s", dirpath); 1204 bad = ENOENT; /* We will send error reply later */ 1205 } 1206 if (!bad && 1207 !S_ISDIR(stb.st_mode) && 1208 (dir_only || !S_ISREG(stb.st_mode))) { 1209 syslog(LOG_NOTICE, 1210 "mount request from %s for non-directory path %s", 1211 numerichost, dirpath); 1212 if (debug) 1213 warnx("mounting non-directory %s", dirpath); 1214 bad = ENOTDIR; /* We will send error reply later */ 1215 } 1216 1217 /* Check in the exports list */ 1218 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1219 if (bad) 1220 ep = NULL; 1221 else 1222 ep = ex_search(&fsb.f_fsid, exphead); 1223 hostset = defset = 0; 1224 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset, 1225 &numsecflavors, &secflavorsp) || 1226 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 1227 chk_host(dp, saddr, &defset, &hostset, &numsecflavors, 1228 &secflavorsp)) || 1229 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 1230 scan_tree(ep->ex_dirl, saddr) == 0))) { 1231 if (bad) { 1232 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1233 (caddr_t)&bad)) 1234 syslog(LOG_ERR, "can't send reply"); 1235 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1236 return; 1237 } 1238 if (hostset & DP_HOSTSET) { 1239 fhr.fhr_flag = hostset; 1240 fhr.fhr_numsecflavors = numsecflavors; 1241 fhr.fhr_secflavors = secflavorsp; 1242 } else { 1243 fhr.fhr_flag = defset; 1244 fhr.fhr_numsecflavors = ep->ex_defnumsecflavors; 1245 fhr.fhr_secflavors = ep->ex_defsecflavors; 1246 } 1247 fhr.fhr_vers = rqstp->rq_vers; 1248 /* Get the file handle */ 1249 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 1250 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 1251 bad = errno; 1252 syslog(LOG_ERR, "can't get fh for %s", dirpath); 1253 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1254 (caddr_t)&bad)) 1255 syslog(LOG_ERR, "can't send reply"); 1256 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1257 return; 1258 } 1259 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, 1260 (caddr_t)&fhr)) 1261 syslog(LOG_ERR, "can't send reply"); 1262 if (!lookup_failed) 1263 add_mlist(host, dirpath); 1264 else 1265 add_mlist(numerichost, dirpath); 1266 if (debug) 1267 warnx("mount successful"); 1268 if (dolog) 1269 syslog(LOG_NOTICE, 1270 "mount request succeeded from %s for %s", 1271 numerichost, dirpath); 1272 } else { 1273 if (!bad) 1274 bad = EACCES; 1275 syslog(LOG_NOTICE, 1276 "mount request denied from %s for %s", 1277 numerichost, dirpath); 1278 } 1279 1280 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, 1281 (caddr_t)&bad)) 1282 syslog(LOG_ERR, "can't send reply"); 1283 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1284 return; 1285 case MOUNTPROC_DUMP: 1286 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL)) 1287 syslog(LOG_ERR, "can't send reply"); 1288 else if (dolog) 1289 syslog(LOG_NOTICE, 1290 "dump request succeeded from %s", 1291 numerichost); 1292 return; 1293 case MOUNTPROC_UMNT: 1294 if (sport >= IPPORT_RESERVED && resvport_only) { 1295 syslog(LOG_NOTICE, 1296 "umount request from %s from unprivileged port", 1297 numerichost); 1298 svcerr_weakauth(transp); 1299 return; 1300 } 1301 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1302 syslog(LOG_NOTICE, "undecodable umount request from %s", 1303 numerichost); 1304 svcerr_decode(transp); 1305 return; 1306 } 1307 if (realpath(rpcpath, dirpath) == NULL) { 1308 syslog(LOG_NOTICE, "umount request from %s " 1309 "for non existent path %s", 1310 numerichost, dirpath); 1311 } 1312 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1313 syslog(LOG_ERR, "can't send reply"); 1314 if (!lookup_failed) 1315 del_mlist(host, dirpath); 1316 del_mlist(numerichost, dirpath); 1317 if (dolog) 1318 syslog(LOG_NOTICE, 1319 "umount request succeeded from %s for %s", 1320 numerichost, dirpath); 1321 return; 1322 case MOUNTPROC_UMNTALL: 1323 if (sport >= IPPORT_RESERVED && resvport_only) { 1324 syslog(LOG_NOTICE, 1325 "umountall request from %s from unprivileged port", 1326 numerichost); 1327 svcerr_weakauth(transp); 1328 return; 1329 } 1330 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1331 syslog(LOG_ERR, "can't send reply"); 1332 if (!lookup_failed) 1333 del_mlist(host, NULL); 1334 del_mlist(numerichost, NULL); 1335 if (dolog) 1336 syslog(LOG_NOTICE, 1337 "umountall request succeeded from %s", 1338 numerichost); 1339 return; 1340 case MOUNTPROC_EXPORT: 1341 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL)) 1342 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, 1343 (caddr_t)NULL)) 1344 syslog(LOG_ERR, "can't send reply"); 1345 if (dolog) 1346 syslog(LOG_NOTICE, 1347 "export request succeeded from %s", 1348 numerichost); 1349 return; 1350 default: 1351 svcerr_noproc(transp); 1352 return; 1353 } 1354 } 1355 1356 /* 1357 * Xdr conversion for a dirpath string 1358 */ 1359 static int 1360 xdr_dir(XDR *xdrsp, char *dirp) 1361 { 1362 return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); 1363 } 1364 1365 /* 1366 * Xdr routine to generate file handle reply 1367 */ 1368 static int 1369 xdr_fhs(XDR *xdrsp, caddr_t cp) 1370 { 1371 struct fhreturn *fhrp = (struct fhreturn *)cp; 1372 u_long ok = 0, len, auth; 1373 int i; 1374 1375 if (!xdr_long(xdrsp, &ok)) 1376 return (0); 1377 switch (fhrp->fhr_vers) { 1378 case 1: 1379 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 1380 case 3: 1381 len = NFSX_V3FH; 1382 if (!xdr_long(xdrsp, &len)) 1383 return (0); 1384 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 1385 return (0); 1386 if (fhrp->fhr_numsecflavors) { 1387 if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors)) 1388 return (0); 1389 for (i = 0; i < fhrp->fhr_numsecflavors; i++) 1390 if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i])) 1391 return (0); 1392 return (1); 1393 } else { 1394 auth = AUTH_SYS; 1395 len = 1; 1396 if (!xdr_long(xdrsp, &len)) 1397 return (0); 1398 return (xdr_long(xdrsp, &auth)); 1399 } 1400 } 1401 return (0); 1402 } 1403 1404 static int 1405 xdr_mlist(XDR *xdrsp, caddr_t cp __unused) 1406 { 1407 struct mountlist *mlp; 1408 int true = 1; 1409 int false = 0; 1410 char *strp; 1411 1412 SLIST_FOREACH(mlp, &mlhead, next) { 1413 if (!xdr_bool(xdrsp, &true)) 1414 return (0); 1415 strp = &mlp->ml_host[0]; 1416 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 1417 return (0); 1418 strp = &mlp->ml_dirp[0]; 1419 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1420 return (0); 1421 } 1422 if (!xdr_bool(xdrsp, &false)) 1423 return (0); 1424 return (1); 1425 } 1426 1427 /* 1428 * Xdr conversion for export list 1429 */ 1430 static int 1431 xdr_explist_common(XDR *xdrsp, caddr_t cp __unused, int brief) 1432 { 1433 struct exportlist *ep; 1434 int false = 0; 1435 int putdef; 1436 sigset_t sighup_mask; 1437 int i; 1438 1439 sigemptyset(&sighup_mask); 1440 sigaddset(&sighup_mask, SIGHUP); 1441 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1442 1443 for (i = 0; i < exphashsize; i++) 1444 SLIST_FOREACH(ep, &exphead[i], entries) { 1445 putdef = 0; 1446 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 1447 &putdef, brief)) 1448 goto errout; 1449 if (ep->ex_defdir && putdef == 0 && 1450 put_exlist(ep->ex_defdir, xdrsp, NULL, 1451 &putdef, brief)) 1452 goto errout; 1453 } 1454 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1455 if (!xdr_bool(xdrsp, &false)) 1456 return (0); 1457 return (1); 1458 errout: 1459 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1460 return (0); 1461 } 1462 1463 /* 1464 * Called from xdr_explist() to traverse the tree and export the 1465 * directory paths. 1466 */ 1467 static int 1468 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, 1469 int brief) 1470 { 1471 struct grouplist *grp; 1472 struct hostlist *hp; 1473 int true = 1; 1474 int false = 0; 1475 int gotalldir = 0; 1476 char *strp; 1477 1478 if (dp) { 1479 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1480 return (1); 1481 if (!xdr_bool(xdrsp, &true)) 1482 return (1); 1483 strp = dp->dp_dirp; 1484 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1485 return (1); 1486 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1487 gotalldir = 1; 1488 *putdefp = 1; 1489 } 1490 if (brief) { 1491 if (!xdr_bool(xdrsp, &true)) 1492 return (1); 1493 strp = "(...)"; 1494 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1495 return (1); 1496 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1497 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1498 hp = dp->dp_hosts; 1499 while (hp) { 1500 grp = hp->ht_grp; 1501 if (grp->gr_type == GT_HOST) { 1502 if (!xdr_bool(xdrsp, &true)) 1503 return (1); 1504 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1505 if (!xdr_string(xdrsp, &strp, 1506 MNTNAMLEN)) 1507 return (1); 1508 } else if (grp->gr_type == GT_NET) { 1509 if (!xdr_bool(xdrsp, &true)) 1510 return (1); 1511 strp = grp->gr_ptr.gt_net.nt_name; 1512 if (!xdr_string(xdrsp, &strp, 1513 MNTNAMLEN)) 1514 return (1); 1515 } 1516 hp = hp->ht_next; 1517 if (gotalldir && hp == (struct hostlist *)NULL) { 1518 hp = adp->dp_hosts; 1519 gotalldir = 0; 1520 } 1521 } 1522 } 1523 if (!xdr_bool(xdrsp, &false)) 1524 return (1); 1525 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1526 return (1); 1527 } 1528 return (0); 1529 } 1530 1531 static int 1532 xdr_explist(XDR *xdrsp, caddr_t cp) 1533 { 1534 1535 return xdr_explist_common(xdrsp, cp, 0); 1536 } 1537 1538 static int 1539 xdr_explist_brief(XDR *xdrsp, caddr_t cp) 1540 { 1541 1542 return xdr_explist_common(xdrsp, cp, 1); 1543 } 1544 1545 static char *line; 1546 static size_t linesize; 1547 static FILE *exp_file; 1548 1549 /* 1550 * Get the export list from one, currently open file 1551 */ 1552 static void 1553 get_exportlist_one(int passno) 1554 { 1555 struct exportlist *ep; 1556 struct grouplist *grp, *tgrp, *savgrp; 1557 struct dirlist *dirhead; 1558 struct statfs fsb; 1559 struct expcred anon; 1560 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1561 char *err_msg = NULL; 1562 int len, has_host, got_nondir, dirplen, netgrp; 1563 uint64_t exflags; 1564 1565 v4root_phase = 0; 1566 anon.cr_groups = NULL; 1567 dirhead = (struct dirlist *)NULL; 1568 while (get_line()) { 1569 if (debug) 1570 warnx("got line %s", line); 1571 cp = line; 1572 nextfield(&cp, &endcp); 1573 if (*cp == '#') 1574 goto nextline; 1575 1576 /* 1577 * Set defaults. 1578 */ 1579 has_host = FALSE; 1580 anon.cr_groups = anon.cr_smallgrps; 1581 anon.cr_uid = UID_NOBODY; 1582 anon.cr_ngroups = 1; 1583 anon.cr_groups[0] = GID_NOGROUP; 1584 exflags = MNT_EXPORTED; 1585 got_nondir = 0; 1586 opt_flags = 0; 1587 ep = (struct exportlist *)NULL; 1588 dirp = NULL; 1589 1590 /* 1591 * Handle the V4 root dir. 1592 */ 1593 if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') { 1594 /* 1595 * V4: just indicates that it is the v4 root point, 1596 * so skip over that and set v4root_phase. 1597 */ 1598 if (v4root_phase > 0) { 1599 syslog(LOG_ERR, "V4:duplicate line, ignored"); 1600 goto nextline; 1601 } 1602 v4root_phase = 1; 1603 cp += 3; 1604 nextfield(&cp, &endcp); 1605 } 1606 1607 /* 1608 * Create new exports list entry 1609 */ 1610 len = endcp-cp; 1611 tgrp = grp = get_grp(); 1612 while (len > 0) { 1613 if (len > MNTNAMLEN) { 1614 getexp_err(ep, tgrp, "mountpoint too long"); 1615 goto nextline; 1616 } 1617 if (*cp == '-') { 1618 if (ep == (struct exportlist *)NULL) { 1619 getexp_err(ep, tgrp, 1620 "flag before export path definition"); 1621 goto nextline; 1622 } 1623 if (debug) 1624 warnx("doing opt %s", cp); 1625 got_nondir = 1; 1626 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1627 &exflags, &anon)) { 1628 getexp_err(ep, tgrp, NULL); 1629 goto nextline; 1630 } 1631 } else if (*cp == '/') { 1632 savedc = *endcp; 1633 *endcp = '\0'; 1634 if (v4root_phase > 1) { 1635 if (dirp != NULL) { 1636 getexp_err(ep, tgrp, "Multiple V4 dirs"); 1637 goto nextline; 1638 } 1639 } 1640 if (check_dirpath(cp, &err_msg) && 1641 check_statfs(cp, &fsb, &err_msg)) { 1642 if ((fsb.f_flags & MNT_AUTOMOUNTED) != 0) 1643 syslog(LOG_ERR, "Warning: exporting of " 1644 "automounted fs %s not supported", cp); 1645 if (got_nondir) { 1646 getexp_err(ep, tgrp, "dirs must be first"); 1647 goto nextline; 1648 } 1649 if (v4root_phase == 1) { 1650 if (dirp != NULL) { 1651 getexp_err(ep, tgrp, "Multiple V4 dirs"); 1652 goto nextline; 1653 } 1654 if (strlen(v4root_dirpath) == 0) { 1655 strlcpy(v4root_dirpath, cp, 1656 sizeof (v4root_dirpath)); 1657 } else if (strcmp(v4root_dirpath, cp) 1658 != 0) { 1659 syslog(LOG_ERR, 1660 "different V4 dirpath %s", cp); 1661 getexp_err(ep, tgrp, NULL); 1662 goto nextline; 1663 } 1664 dirp = cp; 1665 v4root_phase = 2; 1666 got_nondir = 1; 1667 ep = get_exp(); 1668 } else { 1669 if (ep) { 1670 if (fsidcmp(&ep->ex_fs, &fsb.f_fsid) 1671 != 0) { 1672 getexp_err(ep, tgrp, 1673 "fsid mismatch"); 1674 goto nextline; 1675 } 1676 } else { 1677 /* 1678 * See if this directory is already 1679 * in the list. 1680 */ 1681 ep = ex_search(&fsb.f_fsid, exphead); 1682 if (ep == (struct exportlist *)NULL) { 1683 ep = get_exp(); 1684 ep->ex_fs = fsb.f_fsid; 1685 ep->ex_fsdir = strdup(fsb.f_mntonname); 1686 if (ep->ex_fsdir == NULL) 1687 out_of_mem(); 1688 if (debug) 1689 warnx( 1690 "making new ep fs=0x%x,0x%x", 1691 fsb.f_fsid.val[0], 1692 fsb.f_fsid.val[1]); 1693 } else if (debug) 1694 warnx("found ep fs=0x%x,0x%x", 1695 fsb.f_fsid.val[0], 1696 fsb.f_fsid.val[1]); 1697 } 1698 1699 /* 1700 * Add dirpath to export mount point. 1701 */ 1702 dirp = add_expdir(&dirhead, cp, len); 1703 dirplen = len; 1704 } 1705 } else { 1706 if (err_msg != NULL) { 1707 getexp_err(ep, tgrp, err_msg); 1708 free(err_msg); 1709 err_msg = NULL; 1710 } else { 1711 getexp_err(ep, tgrp, 1712 "symbolic link in export path or " 1713 "statfs failed"); 1714 } 1715 goto nextline; 1716 } 1717 *endcp = savedc; 1718 } else { 1719 savedc = *endcp; 1720 *endcp = '\0'; 1721 got_nondir = 1; 1722 if (ep == (struct exportlist *)NULL) { 1723 getexp_err(ep, tgrp, 1724 "host(s) before export path definition"); 1725 goto nextline; 1726 } 1727 1728 /* 1729 * Get the host or netgroup. 1730 */ 1731 setnetgrent(cp); 1732 netgrp = getnetgrent(&hst, &usr, &dom); 1733 do { 1734 if (has_host) { 1735 grp->gr_next = get_grp(); 1736 grp = grp->gr_next; 1737 } 1738 if (netgrp) { 1739 if (hst == 0) { 1740 syslog(LOG_ERR, 1741 "null hostname in netgroup %s, skipping", cp); 1742 grp->gr_type = GT_IGNORE; 1743 } else if (get_host(hst, grp, tgrp)) { 1744 syslog(LOG_ERR, 1745 "bad host %s in netgroup %s, skipping", hst, cp); 1746 grp->gr_type = GT_IGNORE; 1747 } 1748 } else if (get_host(cp, grp, tgrp)) { 1749 syslog(LOG_ERR, "bad host %s, skipping", cp); 1750 grp->gr_type = GT_IGNORE; 1751 } 1752 has_host = TRUE; 1753 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1754 endnetgrent(); 1755 *endcp = savedc; 1756 } 1757 cp = endcp; 1758 nextfield(&cp, &endcp); 1759 len = endcp - cp; 1760 } 1761 if (opt_flags & OP_CLASSMASK) 1762 syslog(LOG_WARNING, 1763 "WARNING: No mask specified for %s, " 1764 "using out-of-date default", 1765 (&grp->gr_ptr.gt_net)->nt_name); 1766 if (check_options(dirhead)) { 1767 getexp_err(ep, tgrp, NULL); 1768 goto nextline; 1769 } 1770 if (!has_host) { 1771 grp->gr_type = GT_DEFAULT; 1772 if (debug) 1773 warnx("adding a default entry"); 1774 1775 /* 1776 * Don't allow a network export coincide with a list of 1777 * host(s) on the same line. 1778 */ 1779 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1780 getexp_err(ep, tgrp, "network/host conflict"); 1781 goto nextline; 1782 1783 /* 1784 * If an export list was specified on this line, make sure 1785 * that we have at least one valid entry, otherwise skip it. 1786 */ 1787 } else { 1788 grp = tgrp; 1789 while (grp && grp->gr_type == GT_IGNORE) 1790 grp = grp->gr_next; 1791 if (! grp) { 1792 getexp_err(ep, tgrp, "no valid entries"); 1793 goto nextline; 1794 } 1795 } 1796 1797 if (v4root_phase == 1) { 1798 getexp_err(ep, tgrp, "V4:root, no dirp, ignored"); 1799 goto nextline; 1800 } 1801 1802 /* 1803 * Loop through hosts, pushing the exports into the kernel. 1804 * After loop, tgrp points to the start of the list and 1805 * grp points to the last entry in the list. 1806 * Do not do the do_mount() for passno == 1, since the 1807 * second pass will do it, as required. 1808 */ 1809 grp = tgrp; 1810 do { 1811 grp->gr_exflags = exflags; 1812 cp_cred(&grp->gr_anon, &anon); 1813 if (v4root_phase == 2 && passno == 0) 1814 LOGDEBUG("do_mount v4root"); 1815 if (passno == 0 && do_mount(ep, grp, exflags, &anon, 1816 dirp, dirplen, &fsb, ep->ex_numsecflavors, 1817 ep->ex_secflavors)) { 1818 getexp_err(ep, tgrp, NULL); 1819 goto nextline; 1820 } 1821 } while (grp->gr_next && (grp = grp->gr_next)); 1822 1823 /* 1824 * For V4: don't enter in mount lists. 1825 */ 1826 if (v4root_phase > 0 && v4root_phase <= 2) { 1827 /* 1828 * These structures are used for the reload, 1829 * so save them for that case. Otherwise, just 1830 * free them up now. 1831 */ 1832 if (passno == 1 && ep != NULL) { 1833 savgrp = tgrp; 1834 while (tgrp != NULL) { 1835 /* 1836 * Save the security flavors and exflags 1837 * for this host set in the groups. 1838 */ 1839 tgrp->gr_numsecflavors = 1840 ep->ex_numsecflavors; 1841 if (ep->ex_numsecflavors > 0) 1842 memcpy(tgrp->gr_secflavors, 1843 ep->ex_secflavors, 1844 sizeof(ep->ex_secflavors)); 1845 tgrp = tgrp->gr_next; 1846 } 1847 if (v4root_ep == NULL) { 1848 v4root_ep = ep; 1849 ep = NULL; /* Don't free below. */ 1850 } 1851 grp->gr_next = v4root_ep->ex_grphead; 1852 v4root_ep->ex_grphead = savgrp; 1853 } 1854 if (ep != NULL) 1855 free_exp(ep); 1856 while (tgrp != NULL) { 1857 grp = tgrp; 1858 tgrp = tgrp->gr_next; 1859 free_grp(grp); 1860 } 1861 goto nextline; 1862 } 1863 1864 /* 1865 * Success. Update the data structures. 1866 */ 1867 if (has_host) { 1868 hang_dirp(dirhead, tgrp, ep, opt_flags, &anon, exflags); 1869 grp->gr_next = ep->ex_grphead; 1870 ep->ex_grphead = tgrp; 1871 } else { 1872 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1873 opt_flags, &anon, exflags); 1874 free_grp(grp); 1875 } 1876 dirhead = (struct dirlist *)NULL; 1877 if ((ep->ex_flag & EX_LINKED) == 0) { 1878 insert_exports(ep, exphead); 1879 1880 ep->ex_flag |= EX_LINKED; 1881 } 1882 nextline: 1883 v4root_phase = 0; 1884 if (dirhead) { 1885 free_dir(dirhead); 1886 dirhead = (struct dirlist *)NULL; 1887 } 1888 if (anon.cr_groups != anon.cr_smallgrps) { 1889 free(anon.cr_groups); 1890 anon.cr_groups = NULL; 1891 } 1892 } 1893 } 1894 1895 /* 1896 * Get the export list from all specified files 1897 */ 1898 static void 1899 get_exportlist(int passno) 1900 { 1901 struct export_args export; 1902 struct iovec *iov; 1903 struct statfs *mntbufp; 1904 char errmsg[255]; 1905 int error, i, nfs_maxvers, num; 1906 int iovlen; 1907 struct nfsex_args eargs; 1908 FILE *debug_file; 1909 size_t nfs_maxvers_size; 1910 1911 if ((debug_file = fopen(_PATH_MOUNTDDEBUG, "r")) != NULL) { 1912 fclose(debug_file); 1913 logdebug = 1; 1914 } else 1915 logdebug = 0; 1916 LOGDEBUG("passno=%d", passno); 1917 v4root_dirpath[0] = '\0'; 1918 free_v4rootexp(); 1919 if (passno == 1) { 1920 /* 1921 * Save the current lists as old ones, so that the new lists 1922 * can be compared with the old ones in the 2nd pass. 1923 */ 1924 for (i = 0; i < exphashsize; i++) { 1925 SLIST_FIRST(&oldexphead[i]) = SLIST_FIRST(&exphead[i]); 1926 SLIST_INIT(&exphead[i]); 1927 } 1928 1929 /* Note that the public fh has not yet been set. */ 1930 has_set_publicfh = 0; 1931 1932 /* Read the export file(s) and process them */ 1933 read_exportfile(passno); 1934 } else { 1935 /* 1936 * Just make the old lists empty. 1937 * exphashsize == 0 for the first call, before oldexphead 1938 * has been initialized-->loop won't be executed. 1939 */ 1940 for (i = 0; i < exphashsize; i++) 1941 SLIST_INIT(&oldexphead[i]); 1942 } 1943 1944 bzero(&export, sizeof(export)); 1945 export.ex_flags = MNT_DELEXPORT; 1946 iov = NULL; 1947 iovlen = 0; 1948 bzero(errmsg, sizeof(errmsg)); 1949 1950 if (suspend_nfsd != 0) 1951 (void)nfssvc(NFSSVC_SUSPENDNFSD, NULL); 1952 /* 1953 * Delete the old V4 root dir. 1954 */ 1955 bzero(&eargs, sizeof (eargs)); 1956 eargs.export.ex_flags = MNT_DELEXPORT; 1957 if (nfssvc(NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT, (caddr_t)&eargs) < 0 && 1958 errno != ENOENT) 1959 syslog(LOG_ERR, "Can't delete exports for V4:"); 1960 1961 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1962 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1963 build_iovec(&iov, &iovlen, "from", NULL, 0); 1964 build_iovec(&iov, &iovlen, "update", NULL, 0); 1965 build_iovec(&iov, &iovlen, "export", &export, 1966 sizeof(export)); 1967 build_iovec(&iov, &iovlen, "errmsg", errmsg, 1968 sizeof(errmsg)); 1969 1970 /* 1971 * For passno == 1, compare the old and new lists updating the kernel 1972 * exports for any cases that have changed. 1973 * This call is doing the second pass through the lists. 1974 * If it fails, fall back on the bulk reload. 1975 */ 1976 if (passno == 1 && compare_nmount_exportlist(iov, iovlen, errmsg) == 1977 0) { 1978 LOGDEBUG("compareok"); 1979 /* Free up the old lists. */ 1980 free_exports(oldexphead); 1981 } else { 1982 LOGDEBUG("doing passno=0"); 1983 /* 1984 * Clear flag that notes if a public fh has been exported. 1985 * It is set by do_mount() if MNT_EXPUBLIC is set for the entry. 1986 */ 1987 has_publicfh = 0; 1988 1989 /* exphead == NULL if not yet allocated (first call). */ 1990 if (exphead != NULL) { 1991 /* 1992 * First, get rid of the old lists. 1993 */ 1994 free_exports(exphead); 1995 free_exports(oldexphead); 1996 } 1997 1998 /* 1999 * And delete exports that are in the kernel for all local 2000 * filesystems. 2001 * XXX: Should know how to handle all local exportable 2002 * filesystems. 2003 */ 2004 num = getmntinfo(&mntbufp, MNT_NOWAIT); 2005 2006 /* Allocate hash tables, for first call. */ 2007 if (exphead == NULL) { 2008 /* Target an average linked list length of 10. */ 2009 exphashsize = num / 10; 2010 if (exphashsize < 1) 2011 exphashsize = 1; 2012 else if (exphashsize > 100000) 2013 exphashsize = 100000; 2014 exphead = malloc(exphashsize * sizeof(*exphead)); 2015 oldexphead = malloc(exphashsize * sizeof(*oldexphead)); 2016 if (exphead == NULL || oldexphead == NULL) 2017 errx(1, "Can't malloc hash tables"); 2018 2019 for (i = 0; i < exphashsize; i++) { 2020 SLIST_INIT(&exphead[i]); 2021 SLIST_INIT(&oldexphead[i]); 2022 } 2023 } 2024 2025 for (i = 0; i < num; i++) 2026 delete_export(iov, iovlen, &mntbufp[i], errmsg); 2027 2028 2029 /* Read the export file(s) and process them */ 2030 read_exportfile(0); 2031 } 2032 2033 if (strlen(v4root_dirpath) == 0) { 2034 /* Check to see if a V4: line is needed. */ 2035 nfs_maxvers_size = sizeof(nfs_maxvers); 2036 error = sysctlbyname("vfs.nfsd.server_max_nfsvers", 2037 &nfs_maxvers, &nfs_maxvers_size, NULL, 0); 2038 if (error != 0 || nfs_maxvers < NFS_VER2 || nfs_maxvers > 2039 NFS_VER4) { 2040 syslog(LOG_ERR, "sysctlbyname(vfs.nfsd." 2041 "server_max_nfsvers) failed, defaulting to NFSv3"); 2042 nfs_maxvers = NFS_VER3; 2043 } 2044 if (nfs_maxvers == NFS_VER4) 2045 syslog(LOG_ERR, "NFSv4 requires at least one V4: line"); 2046 } 2047 2048 if (iov != NULL) { 2049 /* Free strings allocated by strdup() in getmntopts.c */ 2050 free(iov[0].iov_base); /* fstype */ 2051 free(iov[2].iov_base); /* fspath */ 2052 free(iov[4].iov_base); /* from */ 2053 free(iov[6].iov_base); /* update */ 2054 free(iov[8].iov_base); /* export */ 2055 free(iov[10].iov_base); /* errmsg */ 2056 2057 /* free iov, allocated by realloc() */ 2058 free(iov); 2059 iovlen = 0; 2060 } 2061 2062 /* 2063 * If there was no public fh, clear any previous one set. 2064 */ 2065 if (has_publicfh == 0) { 2066 LOGDEBUG("clear public fh"); 2067 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 2068 } 2069 2070 /* Resume the nfsd. If they weren't suspended, this is harmless. */ 2071 (void)nfssvc(NFSSVC_RESUMENFSD, NULL); 2072 LOGDEBUG("eo get_exportlist"); 2073 } 2074 2075 /* 2076 * Insert an export entry in the appropriate list. 2077 */ 2078 static void 2079 insert_exports(struct exportlist *ep, struct exportlisthead *exhp) 2080 { 2081 uint32_t i; 2082 2083 i = EXPHASH(&ep->ex_fs); 2084 LOGDEBUG("fs=%s hash=%i", ep->ex_fsdir, i); 2085 SLIST_INSERT_HEAD(&exhp[i], ep, entries); 2086 } 2087 2088 /* 2089 * Free up the exports lists passed in as arguments. 2090 */ 2091 static void 2092 free_exports(struct exportlisthead *exhp) 2093 { 2094 struct exportlist *ep, *ep2; 2095 int i; 2096 2097 for (i = 0; i < exphashsize; i++) { 2098 SLIST_FOREACH_SAFE(ep, &exhp[i], entries, ep2) { 2099 SLIST_REMOVE(&exhp[i], ep, exportlist, entries); 2100 free_exp(ep); 2101 } 2102 SLIST_INIT(&exhp[i]); 2103 } 2104 } 2105 2106 /* 2107 * Read the exports file(s) and call get_exportlist_one() for each line. 2108 */ 2109 static void 2110 read_exportfile(int passno) 2111 { 2112 int done, i; 2113 2114 /* 2115 * Read in the exports file and build the list, calling 2116 * nmount() as we go along to push the export rules into the kernel. 2117 */ 2118 done = 0; 2119 for (i = 0; exnames[i] != NULL; i++) { 2120 if (debug) 2121 warnx("reading exports from %s", exnames[i]); 2122 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 2123 syslog(LOG_WARNING, "can't open %s", exnames[i]); 2124 continue; 2125 } 2126 get_exportlist_one(passno); 2127 fclose(exp_file); 2128 done++; 2129 } 2130 if (done == 0) { 2131 syslog(LOG_ERR, "can't open any exports file"); 2132 exit(2); 2133 } 2134 } 2135 2136 /* 2137 * Compare the export lists against the old ones and do nmount() operations 2138 * for any cases that have changed. This avoids doing nmount() for entries 2139 * that have not changed. 2140 * Return 0 upon success, 1 otherwise. 2141 */ 2142 static int 2143 compare_nmount_exportlist(struct iovec *iov, int iovlen, char *errmsg) 2144 { 2145 struct exportlist *ep, *oep; 2146 struct grouplist *grp; 2147 struct statfs fs, ofs; 2148 int i, ret; 2149 2150 /* 2151 * Loop through the current list and look for an entry in the old 2152 * list. 2153 * If found, check to see if it the same. 2154 * If it is not the same, delete and re-export. 2155 * Then mark it done on the old list. 2156 * else (not found) 2157 * export it. 2158 * Any entries left in the old list after processing must have their 2159 * exports deleted. 2160 */ 2161 for (i = 0; i < exphashsize; i++) 2162 SLIST_FOREACH(ep, &exphead[i], entries) { 2163 LOGDEBUG("foreach ep=%s", ep->ex_fsdir); 2164 oep = ex_search(&ep->ex_fs, oldexphead); 2165 if (oep != NULL) { 2166 /* 2167 * Check the mount paths are the same. 2168 * If not, return 1 so that the reload of the 2169 * exports will be done in bulk, the 2170 * passno == 0 way. 2171 */ 2172 LOGDEBUG("found old exp"); 2173 if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0) 2174 return (1); 2175 LOGDEBUG("same fsdir"); 2176 /* 2177 * Test to see if the entry is the same. 2178 * If not the same delete exports and 2179 * re-export. 2180 */ 2181 if (compare_export(ep, oep) != 0) { 2182 /* 2183 * Clear has_publicfh if if was set 2184 * in the old exports, but only if it 2185 * has not been set during processing of 2186 * the exports for this pass, as 2187 * indicated by has_set_publicfh. 2188 */ 2189 if (has_set_publicfh == 0 && 2190 (oep->ex_flag & EX_PUBLICFH) != 0) 2191 has_publicfh = 0; 2192 2193 /* Delete and re-export. */ 2194 if (statfs(ep->ex_fsdir, &fs) < 0) 2195 return (1); 2196 delete_export(iov, iovlen, &fs, errmsg); 2197 ret = do_export_mount(ep, &fs); 2198 if (ret != 0) 2199 return (ret); 2200 } 2201 oep->ex_flag |= EX_DONE; 2202 LOGDEBUG("exdone"); 2203 } else { 2204 LOGDEBUG("not found so export"); 2205 /* Not found, so do export. */ 2206 if (statfs(ep->ex_fsdir, &fs) < 0) 2207 return (1); 2208 ret = do_export_mount(ep, &fs); 2209 if (ret != 0) 2210 return (ret); 2211 } 2212 } 2213 2214 /* Delete exports not done. */ 2215 for (i = 0; i < exphashsize; i++) 2216 SLIST_FOREACH(oep, &oldexphead[i], entries) { 2217 if ((oep->ex_flag & EX_DONE) == 0) { 2218 LOGDEBUG("not done delete=%s", oep->ex_fsdir); 2219 if (statfs(oep->ex_fsdir, &ofs) >= 0 && 2220 fsidcmp(&oep->ex_fs, &ofs.f_fsid) == 0) { 2221 LOGDEBUG("do delete"); 2222 /* 2223 * Clear has_publicfh if if was set 2224 * in the old exports, but only if it 2225 * has not been set during processing of 2226 * the exports for this pass, as 2227 * indicated by has_set_publicfh. 2228 */ 2229 if (has_set_publicfh == 0 && 2230 (oep->ex_flag & EX_PUBLICFH) != 0) 2231 has_publicfh = 0; 2232 2233 delete_export(iov, iovlen, &ofs, 2234 errmsg); 2235 } 2236 } 2237 } 2238 2239 /* Do the V4 root exports, as required. */ 2240 grp = NULL; 2241 if (v4root_ep != NULL) 2242 grp = v4root_ep->ex_grphead; 2243 v4root_phase = 2; 2244 while (v4root_ep != NULL && grp != NULL) { 2245 LOGDEBUG("v4root expath=%s", v4root_dirpath); 2246 ret = do_mount(v4root_ep, grp, grp->gr_exflags, &grp->gr_anon, 2247 v4root_dirpath, strlen(v4root_dirpath), &fs, 2248 grp->gr_numsecflavors, grp->gr_secflavors); 2249 if (ret != 0) { 2250 v4root_phase = 0; 2251 return (ret); 2252 } 2253 grp = grp->gr_next; 2254 } 2255 v4root_phase = 0; 2256 free_v4rootexp(); 2257 return (0); 2258 } 2259 2260 /* 2261 * Compare old and current exportlist entries for the fsid and return 0 2262 * if they are the same, 1 otherwise. 2263 */ 2264 static int 2265 compare_export(struct exportlist *ep, struct exportlist *oep) 2266 { 2267 struct grouplist *grp, *ogrp; 2268 2269 if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0) 2270 return (1); 2271 if ((ep->ex_flag & EX_DEFSET) != (oep->ex_flag & EX_DEFSET)) 2272 return (1); 2273 if ((ep->ex_defdir != NULL && oep->ex_defdir == NULL) || 2274 (ep->ex_defdir == NULL && oep->ex_defdir != NULL)) 2275 return (1); 2276 if (ep->ex_defdir != NULL && (ep->ex_defdir->dp_flag & DP_DEFSET) != 2277 (oep->ex_defdir->dp_flag & DP_DEFSET)) 2278 return (1); 2279 if ((ep->ex_flag & EX_DEFSET) != 0 && (ep->ex_defnumsecflavors != 2280 oep->ex_defnumsecflavors || ep->ex_defexflags != 2281 oep->ex_defexflags || compare_cred(&ep->ex_defanon, 2282 &oep->ex_defanon) != 0 || compare_secflavor(ep->ex_defsecflavors, 2283 oep->ex_defsecflavors, ep->ex_defnumsecflavors) != 0)) 2284 return (1); 2285 2286 /* Now, check all the groups. */ 2287 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next) 2288 ogrp->gr_flag = 0; 2289 for (grp = ep->ex_grphead; grp != NULL; grp = grp->gr_next) { 2290 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = 2291 ogrp->gr_next) 2292 if ((ogrp->gr_flag & GR_FND) == 0 && 2293 grp->gr_numsecflavors == ogrp->gr_numsecflavors && 2294 grp->gr_exflags == ogrp->gr_exflags && 2295 compare_cred(&grp->gr_anon, &ogrp->gr_anon) == 0 && 2296 compare_secflavor(grp->gr_secflavors, 2297 ogrp->gr_secflavors, grp->gr_numsecflavors) == 0) 2298 break; 2299 if (ogrp != NULL) 2300 ogrp->gr_flag |= GR_FND; 2301 else 2302 return (1); 2303 } 2304 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next) 2305 if ((ogrp->gr_flag & GR_FND) == 0) 2306 return (1); 2307 return (0); 2308 } 2309 2310 /* 2311 * This algorithm compares two arrays of "n" items. It returns 0 if they are 2312 * the "same" and 1 otherwise. Although suboptimal, it is always safe to 2313 * return 1, which makes compare_nmount_export() reload the exports entry. 2314 * "same" refers to having the same set of values in the two arrays. 2315 * The arrays are in no particular order and duplicates (multiple entries 2316 * in an array with the same value) is allowed. 2317 * The algorithm is inefficient, but the common case of identical arrays is 2318 * handled first and "n" is normally fairly small. 2319 * Since the two functions need the same algorithm but for arrays of 2320 * different types (gid_t vs int), this is done as a macro. 2321 */ 2322 #define COMPARE_ARRAYS(a1, a2, n) \ 2323 do { \ 2324 int fnd, fndarray[(n)], i, j; \ 2325 /* Handle common case of identical arrays. */ \ 2326 for (i = 0; i < (n); i++) \ 2327 if ((a1)[i] != (a2)[i]) \ 2328 break; \ 2329 if (i == (n)) \ 2330 return (0); \ 2331 for (i = 0; i < (n); i++) \ 2332 fndarray[i] = 0; \ 2333 for (i = 0; i < (n); i++) { \ 2334 fnd = 0; \ 2335 for (j = 0; j < (n); j++) { \ 2336 if ((a1)[i] == (a2)[j]) { \ 2337 fndarray[j] = 1; \ 2338 fnd = 1; \ 2339 } \ 2340 } \ 2341 if (fnd == 0) \ 2342 return (1); \ 2343 } \ 2344 for (i = 0; i < (n); i++) \ 2345 if (fndarray[i] == 0) \ 2346 return (1); \ 2347 return (0); \ 2348 } while (0) 2349 2350 /* 2351 * Compare two struct expcred's. Return 0 if the same and 1 otherwise. 2352 */ 2353 static int 2354 compare_cred(struct expcred *cr0, struct expcred *cr1) 2355 { 2356 2357 if (cr0->cr_uid != cr1->cr_uid || cr0->cr_ngroups != cr1->cr_ngroups) 2358 return (1); 2359 2360 COMPARE_ARRAYS(cr0->cr_groups, cr1->cr_groups, cr0->cr_ngroups); 2361 } 2362 2363 /* 2364 * Compare two lists of security flavors. Return 0 if the same and 1 otherwise. 2365 */ 2366 static int 2367 compare_secflavor(int *sec1, int *sec2, int nsec) 2368 { 2369 2370 COMPARE_ARRAYS(sec1, sec2, nsec); 2371 } 2372 2373 /* 2374 * Delete an exports entry. 2375 */ 2376 static void 2377 delete_export(struct iovec *iov, int iovlen, struct statfs *fsp, char *errmsg) 2378 { 2379 struct xvfsconf vfc; 2380 2381 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 2382 syslog(LOG_ERR, "getvfsbyname() failed for %s", 2383 fsp->f_fstypename); 2384 return; 2385 } 2386 2387 /* 2388 * We do not need to delete "export" flag from 2389 * filesystems that do not have it set. 2390 */ 2391 if (!(fsp->f_flags & MNT_EXPORTED)) 2392 return; 2393 /* 2394 * Do not delete export for network filesystem by 2395 * passing "export" arg to nmount(). 2396 * It only makes sense to do this for local filesystems. 2397 */ 2398 if (vfc.vfc_flags & VFCF_NETWORK) 2399 return; 2400 2401 iov[1].iov_base = fsp->f_fstypename; 2402 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 2403 iov[3].iov_base = fsp->f_mntonname; 2404 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 2405 iov[5].iov_base = fsp->f_mntfromname; 2406 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 2407 errmsg[0] = '\0'; 2408 2409 /* 2410 * EXDEV is returned when path exists but is not a 2411 * mount point. May happens if raced with unmount. 2412 */ 2413 if (nmount(iov, iovlen, fsp->f_flags) < 0 && errno != ENOENT && 2414 errno != ENOTSUP && errno != EXDEV) { 2415 syslog(LOG_ERR, 2416 "can't delete exports for %s: %m %s", 2417 fsp->f_mntonname, errmsg); 2418 } 2419 } 2420 2421 /* 2422 * Allocate an export list element 2423 */ 2424 static struct exportlist * 2425 get_exp(void) 2426 { 2427 struct exportlist *ep; 2428 2429 ep = (struct exportlist *)calloc(1, sizeof (struct exportlist)); 2430 if (ep == (struct exportlist *)NULL) 2431 out_of_mem(); 2432 return (ep); 2433 } 2434 2435 /* 2436 * Allocate a group list element 2437 */ 2438 static struct grouplist * 2439 get_grp(void) 2440 { 2441 struct grouplist *gp; 2442 2443 gp = (struct grouplist *)calloc(1, sizeof (struct grouplist)); 2444 if (gp == (struct grouplist *)NULL) 2445 out_of_mem(); 2446 return (gp); 2447 } 2448 2449 /* 2450 * Clean up upon an error in get_exportlist(). 2451 */ 2452 static void 2453 getexp_err(struct exportlist *ep, struct grouplist *grp, const char *reason) 2454 { 2455 struct grouplist *tgrp; 2456 2457 if (!(opt_flags & OP_QUIET)) { 2458 if (reason != NULL) 2459 syslog(LOG_ERR, "bad exports list line '%s': %s", line, 2460 reason); 2461 else 2462 syslog(LOG_ERR, "bad exports list line '%s'", line); 2463 } 2464 if (ep && (ep->ex_flag & EX_LINKED) == 0) 2465 free_exp(ep); 2466 while (grp) { 2467 tgrp = grp; 2468 grp = grp->gr_next; 2469 free_grp(tgrp); 2470 } 2471 } 2472 2473 /* 2474 * Search the export list for a matching fs. 2475 */ 2476 static struct exportlist * 2477 ex_search(fsid_t *fsid, struct exportlisthead *exhp) 2478 { 2479 struct exportlist *ep; 2480 uint32_t i; 2481 2482 i = EXPHASH(fsid); 2483 SLIST_FOREACH(ep, &exhp[i], entries) { 2484 if (fsidcmp(&ep->ex_fs, fsid) == 0) 2485 return (ep); 2486 } 2487 2488 return (ep); 2489 } 2490 2491 /* 2492 * Add a directory path to the list. 2493 */ 2494 static char * 2495 add_expdir(struct dirlist **dpp, char *cp, int len) 2496 { 2497 struct dirlist *dp; 2498 2499 dp = malloc(sizeof (struct dirlist)); 2500 if (dp == (struct dirlist *)NULL) 2501 out_of_mem(); 2502 dp->dp_left = *dpp; 2503 dp->dp_right = (struct dirlist *)NULL; 2504 dp->dp_flag = 0; 2505 dp->dp_hosts = (struct hostlist *)NULL; 2506 dp->dp_dirp = strndup(cp, len); 2507 if (dp->dp_dirp == NULL) 2508 out_of_mem(); 2509 *dpp = dp; 2510 return (dp->dp_dirp); 2511 } 2512 2513 /* 2514 * Hang the dir list element off the dirpath binary tree as required 2515 * and update the entry for host. 2516 */ 2517 static void 2518 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 2519 int flags, struct expcred *anoncrp, uint64_t exflags) 2520 { 2521 struct hostlist *hp; 2522 struct dirlist *dp2; 2523 2524 if (flags & OP_ALLDIRS) { 2525 if (ep->ex_defdir) 2526 free((caddr_t)dp); 2527 else 2528 ep->ex_defdir = dp; 2529 if (grp == (struct grouplist *)NULL) { 2530 ep->ex_flag |= EX_DEFSET; 2531 ep->ex_defdir->dp_flag |= DP_DEFSET; 2532 /* Save the default security flavors list. */ 2533 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2534 if (ep->ex_numsecflavors > 0) 2535 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2536 sizeof(ep->ex_secflavors)); 2537 cp_cred(&ep->ex_defanon, anoncrp); 2538 ep->ex_defexflags = exflags; 2539 } else while (grp) { 2540 hp = get_ht(); 2541 hp->ht_grp = grp; 2542 hp->ht_next = ep->ex_defdir->dp_hosts; 2543 ep->ex_defdir->dp_hosts = hp; 2544 /* Save the security flavors list for this host set. */ 2545 grp->gr_numsecflavors = ep->ex_numsecflavors; 2546 if (ep->ex_numsecflavors > 0) 2547 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2548 sizeof(ep->ex_secflavors)); 2549 grp = grp->gr_next; 2550 } 2551 } else { 2552 2553 /* 2554 * Loop through the directories adding them to the tree. 2555 */ 2556 while (dp) { 2557 dp2 = dp->dp_left; 2558 add_dlist(&ep->ex_dirl, dp, grp, flags, ep, anoncrp, 2559 exflags); 2560 dp = dp2; 2561 } 2562 } 2563 } 2564 2565 /* 2566 * Traverse the binary tree either updating a node that is already there 2567 * for the new directory or adding the new node. 2568 */ 2569 static void 2570 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 2571 int flags, struct exportlist *ep, struct expcred *anoncrp, 2572 uint64_t exflags) 2573 { 2574 struct dirlist *dp; 2575 struct hostlist *hp; 2576 int cmp; 2577 2578 dp = *dpp; 2579 if (dp) { 2580 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 2581 if (cmp > 0) { 2582 add_dlist(&dp->dp_left, newdp, grp, flags, ep, anoncrp, 2583 exflags); 2584 return; 2585 } else if (cmp < 0) { 2586 add_dlist(&dp->dp_right, newdp, grp, flags, ep, anoncrp, 2587 exflags); 2588 return; 2589 } else 2590 free((caddr_t)newdp); 2591 } else { 2592 dp = newdp; 2593 dp->dp_left = (struct dirlist *)NULL; 2594 *dpp = dp; 2595 } 2596 if (grp) { 2597 2598 /* 2599 * Hang all of the host(s) off of the directory point. 2600 */ 2601 do { 2602 hp = get_ht(); 2603 hp->ht_grp = grp; 2604 hp->ht_next = dp->dp_hosts; 2605 dp->dp_hosts = hp; 2606 /* Save the security flavors list for this host set. */ 2607 grp->gr_numsecflavors = ep->ex_numsecflavors; 2608 if (ep->ex_numsecflavors > 0) 2609 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2610 sizeof(ep->ex_secflavors)); 2611 grp = grp->gr_next; 2612 } while (grp); 2613 } else { 2614 ep->ex_flag |= EX_DEFSET; 2615 dp->dp_flag |= DP_DEFSET; 2616 /* Save the default security flavors list. */ 2617 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2618 if (ep->ex_numsecflavors > 0) 2619 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2620 sizeof(ep->ex_secflavors)); 2621 cp_cred(&ep->ex_defanon, anoncrp); 2622 ep->ex_defexflags = exflags; 2623 } 2624 } 2625 2626 /* 2627 * Search for a dirpath on the export point. 2628 */ 2629 static struct dirlist * 2630 dirp_search(struct dirlist *dp, char *dirp) 2631 { 2632 int cmp; 2633 2634 if (dp) { 2635 cmp = strcmp(dp->dp_dirp, dirp); 2636 if (cmp > 0) 2637 return (dirp_search(dp->dp_left, dirp)); 2638 else if (cmp < 0) 2639 return (dirp_search(dp->dp_right, dirp)); 2640 else 2641 return (dp); 2642 } 2643 return (dp); 2644 } 2645 2646 /* 2647 * Scan for a host match in a directory tree. 2648 */ 2649 static int 2650 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 2651 int *hostsetp, int *numsecflavors, int **secflavorsp) 2652 { 2653 struct hostlist *hp; 2654 struct grouplist *grp; 2655 struct addrinfo *ai; 2656 2657 if (dp) { 2658 if (dp->dp_flag & DP_DEFSET) 2659 *defsetp = dp->dp_flag; 2660 hp = dp->dp_hosts; 2661 while (hp) { 2662 grp = hp->ht_grp; 2663 switch (grp->gr_type) { 2664 case GT_HOST: 2665 ai = grp->gr_ptr.gt_addrinfo; 2666 for (; ai; ai = ai->ai_next) { 2667 if (!sacmp(ai->ai_addr, saddr, NULL)) { 2668 *hostsetp = 2669 (hp->ht_flag | DP_HOSTSET); 2670 if (numsecflavors != NULL) { 2671 *numsecflavors = 2672 grp->gr_numsecflavors; 2673 *secflavorsp = 2674 grp->gr_secflavors; 2675 } 2676 return (1); 2677 } 2678 } 2679 break; 2680 case GT_NET: 2681 if (!sacmp(saddr, (struct sockaddr *) 2682 &grp->gr_ptr.gt_net.nt_net, 2683 (struct sockaddr *) 2684 &grp->gr_ptr.gt_net.nt_mask)) { 2685 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2686 if (numsecflavors != NULL) { 2687 *numsecflavors = 2688 grp->gr_numsecflavors; 2689 *secflavorsp = 2690 grp->gr_secflavors; 2691 } 2692 return (1); 2693 } 2694 break; 2695 } 2696 hp = hp->ht_next; 2697 } 2698 } 2699 return (0); 2700 } 2701 2702 /* 2703 * Scan tree for a host that matches the address. 2704 */ 2705 static int 2706 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2707 { 2708 int defset, hostset; 2709 2710 if (dp) { 2711 if (scan_tree(dp->dp_left, saddr)) 2712 return (1); 2713 if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL)) 2714 return (1); 2715 if (scan_tree(dp->dp_right, saddr)) 2716 return (1); 2717 } 2718 return (0); 2719 } 2720 2721 /* 2722 * Traverse the dirlist tree and free it up. 2723 */ 2724 static void 2725 free_dir(struct dirlist *dp) 2726 { 2727 2728 if (dp) { 2729 free_dir(dp->dp_left); 2730 free_dir(dp->dp_right); 2731 free_host(dp->dp_hosts); 2732 free(dp->dp_dirp); 2733 free(dp); 2734 } 2735 } 2736 2737 /* 2738 * Parse a colon separated list of security flavors 2739 */ 2740 static int 2741 parsesec(char *seclist, struct exportlist *ep) 2742 { 2743 char *cp, savedc; 2744 int flavor; 2745 2746 ep->ex_numsecflavors = 0; 2747 for (;;) { 2748 cp = strchr(seclist, ':'); 2749 if (cp) { 2750 savedc = *cp; 2751 *cp = '\0'; 2752 } 2753 2754 if (!strcmp(seclist, "sys")) 2755 flavor = AUTH_SYS; 2756 else if (!strcmp(seclist, "krb5")) 2757 flavor = RPCSEC_GSS_KRB5; 2758 else if (!strcmp(seclist, "krb5i")) 2759 flavor = RPCSEC_GSS_KRB5I; 2760 else if (!strcmp(seclist, "krb5p")) 2761 flavor = RPCSEC_GSS_KRB5P; 2762 else { 2763 if (cp) 2764 *cp = savedc; 2765 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2766 return (1); 2767 } 2768 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2769 if (cp) 2770 *cp = savedc; 2771 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2772 return (1); 2773 } 2774 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2775 ep->ex_numsecflavors++; 2776 if (cp) { 2777 *cp = savedc; 2778 seclist = cp + 1; 2779 } else { 2780 break; 2781 } 2782 } 2783 return (0); 2784 } 2785 2786 /* 2787 * Parse the option string and update fields. 2788 * Option arguments may either be -<option>=<value> or 2789 * -<option> <value> 2790 */ 2791 static int 2792 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2793 int *has_hostp, uint64_t *exflagsp, struct expcred *cr) 2794 { 2795 char *cpoptarg, *cpoptend; 2796 char *cp, *endcp, *cpopt, savedc, savedc2; 2797 int allflag, usedarg; 2798 2799 savedc2 = '\0'; 2800 cpopt = *cpp; 2801 cpopt++; 2802 cp = *endcpp; 2803 savedc = *cp; 2804 *cp = '\0'; 2805 while (cpopt && *cpopt) { 2806 allflag = 1; 2807 usedarg = -2; 2808 if ((cpoptend = strchr(cpopt, ','))) { 2809 *cpoptend++ = '\0'; 2810 if ((cpoptarg = strchr(cpopt, '='))) 2811 *cpoptarg++ = '\0'; 2812 } else { 2813 if ((cpoptarg = strchr(cpopt, '='))) 2814 *cpoptarg++ = '\0'; 2815 else { 2816 *cp = savedc; 2817 nextfield(&cp, &endcp); 2818 **endcpp = '\0'; 2819 if (endcp > cp && *cp != '-') { 2820 cpoptarg = cp; 2821 savedc2 = *endcp; 2822 *endcp = '\0'; 2823 usedarg = 0; 2824 } 2825 } 2826 } 2827 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2828 *exflagsp |= MNT_EXRDONLY; 2829 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2830 !(allflag = strcmp(cpopt, "mapall")) || 2831 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2832 usedarg++; 2833 parsecred(cpoptarg, cr); 2834 if (allflag == 0) { 2835 *exflagsp |= MNT_EXPORTANON; 2836 opt_flags |= OP_MAPALL; 2837 } else 2838 opt_flags |= OP_MAPROOT; 2839 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2840 !strcmp(cpopt, "m"))) { 2841 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2842 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2843 return (1); 2844 } 2845 usedarg++; 2846 opt_flags |= OP_MASK; 2847 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2848 !strcmp(cpopt, "n"))) { 2849 if (strchr(cpoptarg, '/') != NULL) { 2850 if (debug) 2851 fprintf(stderr, "setting OP_MASKLEN\n"); 2852 opt_flags |= OP_MASKLEN; 2853 } 2854 if (grp->gr_type != GT_NULL) { 2855 syslog(LOG_ERR, "network/host conflict"); 2856 return (1); 2857 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2858 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2859 return (1); 2860 } 2861 grp->gr_type = GT_NET; 2862 *has_hostp = 1; 2863 usedarg++; 2864 opt_flags |= OP_NET; 2865 } else if (!strcmp(cpopt, "alldirs")) { 2866 opt_flags |= OP_ALLDIRS; 2867 } else if (!strcmp(cpopt, "public")) { 2868 *exflagsp |= MNT_EXPUBLIC; 2869 } else if (!strcmp(cpopt, "webnfs")) { 2870 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2871 opt_flags |= OP_MAPALL; 2872 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2873 ep->ex_indexfile = strdup(cpoptarg); 2874 } else if (!strcmp(cpopt, "quiet")) { 2875 opt_flags |= OP_QUIET; 2876 } else if (cpoptarg && !strcmp(cpopt, "sec")) { 2877 if (parsesec(cpoptarg, ep)) 2878 return (1); 2879 opt_flags |= OP_SEC; 2880 usedarg++; 2881 } else if (!strcmp(cpopt, "tls")) { 2882 *exflagsp |= MNT_EXTLS; 2883 } else if (!strcmp(cpopt, "tlscert")) { 2884 *exflagsp |= (MNT_EXTLS | MNT_EXTLSCERT); 2885 } else if (!strcmp(cpopt, "tlscertuser")) { 2886 *exflagsp |= (MNT_EXTLS | MNT_EXTLSCERT | 2887 MNT_EXTLSCERTUSER); 2888 } else { 2889 syslog(LOG_ERR, "bad opt %s", cpopt); 2890 return (1); 2891 } 2892 if (usedarg >= 0) { 2893 *endcp = savedc2; 2894 **endcpp = savedc; 2895 if (usedarg > 0) { 2896 *cpp = cp; 2897 *endcpp = endcp; 2898 } 2899 return (0); 2900 } 2901 cpopt = cpoptend; 2902 } 2903 **endcpp = savedc; 2904 return (0); 2905 } 2906 2907 /* 2908 * Translate a character string to the corresponding list of network 2909 * addresses for a hostname. 2910 */ 2911 static int 2912 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 2913 { 2914 struct grouplist *checkgrp; 2915 struct addrinfo *ai, *tai, hints; 2916 int ecode; 2917 char host[NI_MAXHOST]; 2918 2919 if (grp->gr_type != GT_NULL) { 2920 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2921 return (1); 2922 } 2923 memset(&hints, 0, sizeof hints); 2924 hints.ai_flags = AI_CANONNAME; 2925 hints.ai_protocol = IPPROTO_UDP; 2926 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2927 if (ecode != 0) { 2928 syslog(LOG_ERR,"can't get address info for host %s", cp); 2929 return 1; 2930 } 2931 grp->gr_ptr.gt_addrinfo = ai; 2932 while (ai != NULL) { 2933 if (ai->ai_canonname == NULL) { 2934 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2935 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2936 strlcpy(host, "?", sizeof(host)); 2937 ai->ai_canonname = strdup(host); 2938 ai->ai_flags |= AI_CANONNAME; 2939 } 2940 if (debug) 2941 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2942 /* 2943 * Sanity check: make sure we don't already have an entry 2944 * for this host in the grouplist. 2945 */ 2946 for (checkgrp = tgrp; checkgrp != NULL; 2947 checkgrp = checkgrp->gr_next) { 2948 if (checkgrp->gr_type != GT_HOST) 2949 continue; 2950 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2951 tai = tai->ai_next) { 2952 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2953 continue; 2954 if (debug) 2955 fprintf(stderr, 2956 "ignoring duplicate host %s\n", 2957 ai->ai_canonname); 2958 grp->gr_type = GT_IGNORE; 2959 return (0); 2960 } 2961 } 2962 ai = ai->ai_next; 2963 } 2964 grp->gr_type = GT_HOST; 2965 return (0); 2966 } 2967 2968 /* 2969 * Free up an exports list component 2970 */ 2971 static void 2972 free_exp(struct exportlist *ep) 2973 { 2974 struct grouplist *grp, *tgrp; 2975 2976 if (ep->ex_defdir) { 2977 free_host(ep->ex_defdir->dp_hosts); 2978 free((caddr_t)ep->ex_defdir); 2979 } 2980 if (ep->ex_fsdir) 2981 free(ep->ex_fsdir); 2982 if (ep->ex_indexfile) 2983 free(ep->ex_indexfile); 2984 free_dir(ep->ex_dirl); 2985 grp = ep->ex_grphead; 2986 while (grp) { 2987 tgrp = grp; 2988 grp = grp->gr_next; 2989 free_grp(tgrp); 2990 } 2991 if (ep->ex_defanon.cr_groups != ep->ex_defanon.cr_smallgrps) 2992 free(ep->ex_defanon.cr_groups); 2993 free((caddr_t)ep); 2994 } 2995 2996 /* 2997 * Free up the v4root exports. 2998 */ 2999 static void 3000 free_v4rootexp(void) 3001 { 3002 3003 if (v4root_ep != NULL) { 3004 free_exp(v4root_ep); 3005 v4root_ep = NULL; 3006 } 3007 } 3008 3009 /* 3010 * Free hosts. 3011 */ 3012 static void 3013 free_host(struct hostlist *hp) 3014 { 3015 struct hostlist *hp2; 3016 3017 while (hp) { 3018 hp2 = hp; 3019 hp = hp->ht_next; 3020 free((caddr_t)hp2); 3021 } 3022 } 3023 3024 static struct hostlist * 3025 get_ht(void) 3026 { 3027 struct hostlist *hp; 3028 3029 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 3030 if (hp == (struct hostlist *)NULL) 3031 out_of_mem(); 3032 hp->ht_next = (struct hostlist *)NULL; 3033 hp->ht_flag = 0; 3034 return (hp); 3035 } 3036 3037 /* 3038 * Out of memory, fatal 3039 */ 3040 static void 3041 out_of_mem(void) 3042 { 3043 3044 syslog(LOG_ERR, "out of memory"); 3045 exit(2); 3046 } 3047 3048 /* 3049 * Call do_mount() from the struct exportlist, for each case needed. 3050 */ 3051 static int 3052 do_export_mount(struct exportlist *ep, struct statfs *fsp) 3053 { 3054 struct grouplist *grp, defgrp; 3055 int ret; 3056 size_t dirlen; 3057 3058 LOGDEBUG("do_export_mount=%s", ep->ex_fsdir); 3059 dirlen = strlen(ep->ex_fsdir); 3060 if ((ep->ex_flag & EX_DEFSET) != 0) { 3061 defgrp.gr_type = GT_DEFAULT; 3062 defgrp.gr_next = NULL; 3063 /* We have an entry for all other hosts/nets. */ 3064 LOGDEBUG("ex_defexflags=0x%jx", (uintmax_t)ep->ex_defexflags); 3065 ret = do_mount(ep, &defgrp, ep->ex_defexflags, &ep->ex_defanon, 3066 ep->ex_fsdir, dirlen, fsp, ep->ex_defnumsecflavors, 3067 ep->ex_defsecflavors); 3068 if (ret != 0) 3069 return (ret); 3070 } 3071 3072 /* Do a mount for each group. */ 3073 grp = ep->ex_grphead; 3074 while (grp != NULL) { 3075 LOGDEBUG("do mount gr_type=0x%x gr_exflags=0x%jx", 3076 grp->gr_type, (uintmax_t)grp->gr_exflags); 3077 ret = do_mount(ep, grp, grp->gr_exflags, &grp->gr_anon, 3078 ep->ex_fsdir, dirlen, fsp, grp->gr_numsecflavors, 3079 grp->gr_secflavors); 3080 if (ret != 0) 3081 return (ret); 3082 grp = grp->gr_next; 3083 } 3084 return (0); 3085 } 3086 3087 /* 3088 * Do the nmount() syscall with the update flag to push the export info into 3089 * the kernel. 3090 */ 3091 static int 3092 do_mount(struct exportlist *ep, struct grouplist *grp, uint64_t exflags, 3093 struct expcred *anoncrp, char *dirp, int dirplen, struct statfs *fsb, 3094 int numsecflavors, int *secflavors) 3095 { 3096 struct statfs fsb1; 3097 struct addrinfo *ai; 3098 struct export_args *eap; 3099 char errmsg[255]; 3100 char *cp; 3101 int done; 3102 char savedc; 3103 struct iovec *iov; 3104 int i, iovlen; 3105 int ret; 3106 struct nfsex_args nfsea; 3107 3108 eap = &nfsea.export; 3109 3110 cp = NULL; 3111 savedc = '\0'; 3112 iov = NULL; 3113 iovlen = 0; 3114 ret = 0; 3115 3116 bzero(eap, sizeof (struct export_args)); 3117 bzero(errmsg, sizeof(errmsg)); 3118 eap->ex_flags = exflags; 3119 eap->ex_uid = anoncrp->cr_uid; 3120 eap->ex_ngroups = anoncrp->cr_ngroups; 3121 if (eap->ex_ngroups > 0) { 3122 eap->ex_groups = malloc(eap->ex_ngroups * sizeof(gid_t)); 3123 memcpy(eap->ex_groups, anoncrp->cr_groups, eap->ex_ngroups * 3124 sizeof(gid_t)); 3125 } 3126 LOGDEBUG("do_mount exflags=0x%jx", (uintmax_t)exflags); 3127 eap->ex_indexfile = ep->ex_indexfile; 3128 if (grp->gr_type == GT_HOST) 3129 ai = grp->gr_ptr.gt_addrinfo; 3130 else 3131 ai = NULL; 3132 eap->ex_numsecflavors = numsecflavors; 3133 LOGDEBUG("do_mount numsec=%d", numsecflavors); 3134 for (i = 0; i < eap->ex_numsecflavors; i++) 3135 eap->ex_secflavors[i] = secflavors[i]; 3136 if (eap->ex_numsecflavors == 0) { 3137 eap->ex_numsecflavors = 1; 3138 eap->ex_secflavors[0] = AUTH_SYS; 3139 } 3140 done = FALSE; 3141 3142 if (v4root_phase == 0) { 3143 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 3144 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 3145 build_iovec(&iov, &iovlen, "from", NULL, 0); 3146 build_iovec(&iov, &iovlen, "update", NULL, 0); 3147 build_iovec(&iov, &iovlen, "export", eap, 3148 sizeof (struct export_args)); 3149 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 3150 } 3151 3152 while (!done) { 3153 switch (grp->gr_type) { 3154 case GT_HOST: 3155 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 3156 goto skip; 3157 eap->ex_addr = ai->ai_addr; 3158 eap->ex_addrlen = ai->ai_addrlen; 3159 eap->ex_masklen = 0; 3160 break; 3161 case GT_NET: 3162 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 3163 have_v6 == 0) 3164 goto skip; 3165 eap->ex_addr = 3166 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 3167 eap->ex_addrlen = 3168 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 3169 eap->ex_mask = 3170 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 3171 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 3172 break; 3173 case GT_DEFAULT: 3174 eap->ex_addr = NULL; 3175 eap->ex_addrlen = 0; 3176 eap->ex_mask = NULL; 3177 eap->ex_masklen = 0; 3178 break; 3179 case GT_IGNORE: 3180 ret = 0; 3181 goto error_exit; 3182 break; 3183 default: 3184 syslog(LOG_ERR, "bad grouptype"); 3185 if (cp) 3186 *cp = savedc; 3187 ret = 1; 3188 goto error_exit; 3189 } 3190 3191 /* 3192 * For V4:, use the nfssvc() syscall, instead of mount(). 3193 */ 3194 if (v4root_phase == 2) { 3195 nfsea.fspec = v4root_dirpath; 3196 if (nfssvc(NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT, 3197 (caddr_t)&nfsea) < 0) { 3198 syslog(LOG_ERR, "Exporting V4: failed"); 3199 ret = 2; 3200 goto error_exit; 3201 } 3202 } else { 3203 /* 3204 * XXX: 3205 * Maybe I should just use the fsb->f_mntonname path 3206 * instead of looping back up the dirp to the mount 3207 * point?? 3208 * Also, needs to know how to export all types of local 3209 * exportable filesystems and not just "ufs". 3210 */ 3211 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 3212 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 3213 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 3214 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 3215 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 3216 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 3217 errmsg[0] = '\0'; 3218 3219 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 3220 if (cp) 3221 *cp-- = savedc; 3222 else 3223 cp = dirp + dirplen - 1; 3224 if (opt_flags & OP_QUIET) { 3225 ret = 1; 3226 goto error_exit; 3227 } 3228 if (errno == EPERM) { 3229 if (debug) 3230 warnx("can't change attributes for %s: %s", 3231 dirp, errmsg); 3232 syslog(LOG_ERR, 3233 "can't change attributes for %s: %s", 3234 dirp, errmsg); 3235 ret = 1; 3236 goto error_exit; 3237 } 3238 if (opt_flags & OP_ALLDIRS) { 3239 if (errno == EINVAL) 3240 syslog(LOG_ERR, 3241 "-alldirs requested but %s is not a filesystem mountpoint", 3242 dirp); 3243 else 3244 syslog(LOG_ERR, 3245 "could not remount %s: %m", 3246 dirp); 3247 ret = 1; 3248 goto error_exit; 3249 } 3250 /* back up over the last component */ 3251 while (cp > dirp && *cp == '/') 3252 cp--; 3253 while (cp > dirp && *(cp - 1) != '/') 3254 cp--; 3255 if (cp == dirp) { 3256 if (debug) 3257 warnx("mnt unsucc"); 3258 syslog(LOG_ERR, "can't export %s %s", 3259 dirp, errmsg); 3260 ret = 1; 3261 goto error_exit; 3262 } 3263 savedc = *cp; 3264 *cp = '\0'; 3265 /* 3266 * Check that we're still on the same 3267 * filesystem. 3268 */ 3269 if (statfs(dirp, &fsb1) != 0 || 3270 fsidcmp(&fsb1.f_fsid, &fsb->f_fsid) != 0) { 3271 *cp = savedc; 3272 syslog(LOG_ERR, 3273 "can't export %s %s", dirp, 3274 errmsg); 3275 ret = 1; 3276 goto error_exit; 3277 } 3278 } 3279 } 3280 3281 /* 3282 * For the experimental server: 3283 * If this is the public directory, get the file handle 3284 * and load it into the kernel via the nfssvc() syscall. 3285 */ 3286 if ((exflags & MNT_EXPUBLIC) != 0) { 3287 fhandle_t fh; 3288 char *public_name; 3289 3290 if (eap->ex_indexfile != NULL) 3291 public_name = eap->ex_indexfile; 3292 else 3293 public_name = dirp; 3294 if (getfh(public_name, &fh) < 0) 3295 syslog(LOG_ERR, 3296 "Can't get public fh for %s", public_name); 3297 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 3298 syslog(LOG_ERR, 3299 "Can't set public fh for %s", public_name); 3300 else { 3301 has_publicfh = 1; 3302 has_set_publicfh = 1; 3303 ep->ex_flag |= EX_PUBLICFH; 3304 } 3305 } 3306 skip: 3307 if (ai != NULL) 3308 ai = ai->ai_next; 3309 if (ai == NULL) 3310 done = TRUE; 3311 } 3312 if (cp) 3313 *cp = savedc; 3314 error_exit: 3315 free(eap->ex_groups); 3316 /* free strings allocated by strdup() in getmntopts.c */ 3317 if (iov != NULL) { 3318 free(iov[0].iov_base); /* fstype */ 3319 free(iov[2].iov_base); /* fspath */ 3320 free(iov[4].iov_base); /* from */ 3321 free(iov[6].iov_base); /* update */ 3322 free(iov[8].iov_base); /* export */ 3323 free(iov[10].iov_base); /* errmsg */ 3324 3325 /* free iov, allocated by realloc() */ 3326 free(iov); 3327 } 3328 return (ret); 3329 } 3330 3331 /* 3332 * Translate a net address. 3333 * 3334 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 3335 */ 3336 static int 3337 get_net(char *cp, struct netmsk *net, int maskflg) 3338 { 3339 struct netent *np = NULL; 3340 char *name, *p, *prefp; 3341 struct sockaddr_in sin; 3342 struct sockaddr *sa = NULL; 3343 struct addrinfo hints, *ai = NULL; 3344 char netname[NI_MAXHOST]; 3345 long preflen; 3346 3347 p = prefp = NULL; 3348 if ((opt_flags & OP_MASKLEN) && !maskflg) { 3349 p = strchr(cp, '/'); 3350 *p = '\0'; 3351 prefp = p + 1; 3352 } 3353 3354 /* 3355 * Check for a numeric address first. We wish to avoid 3356 * possible DNS lookups in getnetbyname(). 3357 */ 3358 if (isxdigit(*cp) || *cp == ':') { 3359 memset(&hints, 0, sizeof hints); 3360 /* Ensure the mask and the network have the same family. */ 3361 if (maskflg && (opt_flags & OP_NET)) 3362 hints.ai_family = net->nt_net.ss_family; 3363 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 3364 hints.ai_family = net->nt_mask.ss_family; 3365 else 3366 hints.ai_family = AF_UNSPEC; 3367 hints.ai_flags = AI_NUMERICHOST; 3368 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 3369 sa = ai->ai_addr; 3370 if (sa != NULL && ai->ai_family == AF_INET) { 3371 /* 3372 * The address in `cp' is really a network address, so 3373 * use inet_network() to re-interpret this correctly. 3374 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 3375 */ 3376 bzero(&sin, sizeof sin); 3377 sin.sin_family = AF_INET; 3378 sin.sin_len = sizeof sin; 3379 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 3380 if (debug) 3381 fprintf(stderr, "get_net: v4 addr %s\n", 3382 inet_ntoa(sin.sin_addr)); 3383 sa = (struct sockaddr *)&sin; 3384 } 3385 } 3386 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 3387 bzero(&sin, sizeof sin); 3388 sin.sin_family = AF_INET; 3389 sin.sin_len = sizeof sin; 3390 sin.sin_addr = inet_makeaddr(np->n_net, 0); 3391 sa = (struct sockaddr *)&sin; 3392 } 3393 if (sa == NULL) 3394 goto fail; 3395 3396 if (maskflg) { 3397 /* The specified sockaddr is a mask. */ 3398 if (checkmask(sa) != 0) 3399 goto fail; 3400 bcopy(sa, &net->nt_mask, sa->sa_len); 3401 opt_flags |= OP_HAVEMASK; 3402 opt_flags &= ~OP_CLASSMASK; 3403 } else { 3404 /* The specified sockaddr is a network address. */ 3405 bcopy(sa, &net->nt_net, sa->sa_len); 3406 3407 /* Get a network name for the export list. */ 3408 if (np) { 3409 name = np->n_name; 3410 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 3411 NULL, 0, NI_NUMERICHOST) == 0) { 3412 name = netname; 3413 } else { 3414 goto fail; 3415 } 3416 if ((net->nt_name = strdup(name)) == NULL) 3417 out_of_mem(); 3418 3419 /* 3420 * Extract a mask from either a "/<masklen>" suffix, or 3421 * from the class of an IPv4 address. 3422 */ 3423 if (opt_flags & OP_MASKLEN) { 3424 preflen = strtol(prefp, NULL, 10); 3425 if (preflen < 0L || preflen == LONG_MAX) 3426 goto fail; 3427 bcopy(sa, &net->nt_mask, sa->sa_len); 3428 if (makemask(&net->nt_mask, (int)preflen) != 0) 3429 goto fail; 3430 opt_flags |= OP_HAVEMASK; 3431 *p = '/'; 3432 } else if (sa->sa_family == AF_INET && 3433 (opt_flags & OP_MASK) == 0) { 3434 in_addr_t addr; 3435 3436 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 3437 if (IN_CLASSA(addr)) 3438 preflen = 8; 3439 else if (IN_CLASSB(addr)) 3440 preflen = 16; 3441 else if (IN_CLASSC(addr)) 3442 preflen = 24; 3443 else if (IN_CLASSD(addr)) /* XXX Multicast??? */ 3444 preflen = 28; 3445 else 3446 preflen = 32; /* XXX */ 3447 3448 bcopy(sa, &net->nt_mask, sa->sa_len); 3449 makemask(&net->nt_mask, (int)preflen); 3450 opt_flags |= OP_HAVEMASK | OP_CLASSMASK; 3451 } 3452 } 3453 3454 if (ai) 3455 freeaddrinfo(ai); 3456 return 0; 3457 3458 fail: 3459 if (ai) 3460 freeaddrinfo(ai); 3461 return 1; 3462 } 3463 3464 /* 3465 * Parse out the next white space separated field 3466 */ 3467 static void 3468 nextfield(char **cp, char **endcp) 3469 { 3470 char *p; 3471 char quot = 0; 3472 3473 p = *cp; 3474 while (*p == ' ' || *p == '\t') 3475 p++; 3476 *cp = p; 3477 while (*p != '\0') { 3478 if (quot) { 3479 if (*p == quot) 3480 quot = 0; 3481 } else { 3482 if (*p == '\\' && *(p + 1) != '\0') 3483 p++; 3484 else if (*p == '\'' || *p == '"') 3485 quot = *p; 3486 else if (*p == ' ' || *p == '\t') 3487 break; 3488 } 3489 p++; 3490 }; 3491 *endcp = p; 3492 } 3493 3494 /* 3495 * Get an exports file line. Skip over blank lines and handle line 3496 * continuations. 3497 */ 3498 static int 3499 get_line(void) 3500 { 3501 char *p, *cp; 3502 size_t len; 3503 int totlen, cont_line; 3504 3505 /* 3506 * Loop around ignoring blank lines and getting all continuation lines. 3507 */ 3508 p = line; 3509 totlen = 0; 3510 do { 3511 if ((p = fgetln(exp_file, &len)) == NULL) 3512 return (0); 3513 cp = p + len - 1; 3514 cont_line = 0; 3515 while (cp >= p && 3516 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 3517 if (*cp == '\\') 3518 cont_line = 1; 3519 cp--; 3520 len--; 3521 } 3522 if (cont_line) { 3523 *++cp = ' '; 3524 len++; 3525 } 3526 if (linesize < len + totlen + 1) { 3527 linesize = len + totlen + 1; 3528 line = realloc(line, linesize); 3529 if (line == NULL) 3530 out_of_mem(); 3531 } 3532 memcpy(line + totlen, p, len); 3533 totlen += len; 3534 line[totlen] = '\0'; 3535 } while (totlen == 0 || cont_line); 3536 return (1); 3537 } 3538 3539 /* 3540 * Parse a description of a credential. 3541 */ 3542 static void 3543 parsecred(char *namelist, struct expcred *cr) 3544 { 3545 char *name; 3546 int inpos; 3547 char *names; 3548 struct passwd *pw; 3549 struct group *gr; 3550 gid_t groups[NGROUPS_MAX + 1]; 3551 int ngroups; 3552 unsigned long name_ul; 3553 char *end = NULL; 3554 3555 /* 3556 * Set up the unprivileged user. 3557 */ 3558 cr->cr_groups = cr->cr_smallgrps; 3559 cr->cr_uid = UID_NOBODY; 3560 cr->cr_groups[0] = GID_NOGROUP; 3561 cr->cr_ngroups = 1; 3562 /* 3563 * Get the user's password table entry. 3564 */ 3565 names = namelist; 3566 name = strsep_quote(&names, ":"); 3567 /* Bug? name could be NULL here */ 3568 name_ul = strtoul(name, &end, 10); 3569 if (*end != '\0' || end == name) 3570 pw = getpwnam(name); 3571 else 3572 pw = getpwuid((uid_t)name_ul); 3573 /* 3574 * Credentials specified as those of a user. 3575 */ 3576 if (names == NULL) { 3577 if (pw == NULL) { 3578 syslog(LOG_ERR, "unknown user: %s", name); 3579 return; 3580 } 3581 cr->cr_uid = pw->pw_uid; 3582 ngroups = NGROUPS_MAX + 1; 3583 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) { 3584 syslog(LOG_ERR, "too many groups"); 3585 ngroups = NGROUPS_MAX + 1; 3586 } 3587 3588 /* 3589 * Compress out duplicate. 3590 */ 3591 if (ngroups > 1 && groups[0] == groups[1]) { 3592 ngroups--; 3593 inpos = 2; 3594 } else { 3595 inpos = 1; 3596 } 3597 if (ngroups > NGROUPS_MAX) 3598 ngroups = NGROUPS_MAX; 3599 if (ngroups > SMALLNGROUPS) 3600 cr->cr_groups = malloc(ngroups * sizeof(gid_t)); 3601 cr->cr_ngroups = ngroups; 3602 cr->cr_groups[0] = groups[0]; 3603 memcpy(&cr->cr_groups[1], &groups[inpos], (ngroups - 1) * 3604 sizeof(gid_t)); 3605 return; 3606 } 3607 /* 3608 * Explicit credential specified as a colon separated list: 3609 * uid:gid:gid:... 3610 */ 3611 if (pw != NULL) { 3612 cr->cr_uid = pw->pw_uid; 3613 } else if (*end != '\0' || end == name) { 3614 syslog(LOG_ERR, "unknown user: %s", name); 3615 return; 3616 } else { 3617 cr->cr_uid = name_ul; 3618 } 3619 cr->cr_ngroups = 0; 3620 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS_MAX) { 3621 name = strsep_quote(&names, ":"); 3622 name_ul = strtoul(name, &end, 10); 3623 if (*end != '\0' || end == name) { 3624 if ((gr = getgrnam(name)) == NULL) { 3625 syslog(LOG_ERR, "unknown group: %s", name); 3626 continue; 3627 } 3628 groups[cr->cr_ngroups++] = gr->gr_gid; 3629 } else { 3630 groups[cr->cr_ngroups++] = name_ul; 3631 } 3632 } 3633 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS_MAX) 3634 syslog(LOG_ERR, "too many groups"); 3635 if (cr->cr_ngroups > SMALLNGROUPS) 3636 cr->cr_groups = malloc(cr->cr_ngroups * sizeof(gid_t)); 3637 memcpy(cr->cr_groups, groups, cr->cr_ngroups * sizeof(gid_t)); 3638 } 3639 3640 #define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 3641 /* 3642 * Routines that maintain the remote mounttab 3643 */ 3644 static void 3645 get_mountlist(void) 3646 { 3647 struct mountlist *mlp; 3648 char *host, *dirp, *cp; 3649 char str[STRSIZ]; 3650 FILE *mlfile; 3651 3652 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 3653 if (errno == ENOENT) 3654 return; 3655 else { 3656 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 3657 return; 3658 } 3659 } 3660 while (fgets(str, STRSIZ, mlfile) != NULL) { 3661 cp = str; 3662 host = strsep(&cp, " \t\n"); 3663 dirp = strsep(&cp, " \t\n"); 3664 if (host == NULL || dirp == NULL) 3665 continue; 3666 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3667 if (mlp == (struct mountlist *)NULL) 3668 out_of_mem(); 3669 strncpy(mlp->ml_host, host, MNTNAMLEN); 3670 mlp->ml_host[MNTNAMLEN] = '\0'; 3671 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3672 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3673 3674 SLIST_INSERT_HEAD(&mlhead, mlp, next); 3675 } 3676 fclose(mlfile); 3677 } 3678 3679 static void 3680 del_mlist(char *hostp, char *dirp) 3681 { 3682 struct mountlist *mlp, *mlp2; 3683 FILE *mlfile; 3684 int fnd = 0; 3685 3686 SLIST_FOREACH_SAFE(mlp, &mlhead, next, mlp2) { 3687 if (!strcmp(mlp->ml_host, hostp) && 3688 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 3689 fnd = 1; 3690 SLIST_REMOVE(&mlhead, mlp, mountlist, next); 3691 free((caddr_t)mlp); 3692 } 3693 } 3694 if (fnd) { 3695 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 3696 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 3697 return; 3698 } 3699 SLIST_FOREACH(mlp, &mlhead, next) { 3700 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3701 } 3702 fclose(mlfile); 3703 } 3704 } 3705 3706 static void 3707 add_mlist(char *hostp, char *dirp) 3708 { 3709 struct mountlist *mlp; 3710 FILE *mlfile; 3711 3712 SLIST_FOREACH(mlp, &mlhead, next) { 3713 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 3714 return; 3715 } 3716 3717 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3718 if (mlp == (struct mountlist *)NULL) 3719 out_of_mem(); 3720 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 3721 mlp->ml_host[MNTNAMLEN] = '\0'; 3722 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3723 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3724 SLIST_INSERT_HEAD(&mlhead, mlp, next); 3725 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 3726 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 3727 return; 3728 } 3729 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3730 fclose(mlfile); 3731 } 3732 3733 /* 3734 * Free up a group list. 3735 */ 3736 static void 3737 free_grp(struct grouplist *grp) 3738 { 3739 if (grp->gr_type == GT_HOST) { 3740 if (grp->gr_ptr.gt_addrinfo != NULL) 3741 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 3742 } else if (grp->gr_type == GT_NET) { 3743 if (grp->gr_ptr.gt_net.nt_name) 3744 free(grp->gr_ptr.gt_net.nt_name); 3745 } 3746 if (grp->gr_anon.cr_groups != grp->gr_anon.cr_smallgrps) 3747 free(grp->gr_anon.cr_groups); 3748 free((caddr_t)grp); 3749 } 3750 3751 #ifdef DEBUG 3752 static void 3753 SYSLOG(int pri, const char *fmt, ...) 3754 { 3755 va_list ap; 3756 3757 va_start(ap, fmt); 3758 vfprintf(stderr, fmt, ap); 3759 va_end(ap); 3760 } 3761 #endif /* DEBUG */ 3762 3763 /* 3764 * Check options for consistency. 3765 */ 3766 static int 3767 check_options(struct dirlist *dp) 3768 { 3769 3770 if (v4root_phase == 0 && dp == NULL) 3771 return (1); 3772 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 3773 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 3774 return (1); 3775 } 3776 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 3777 syslog(LOG_ERR, "-mask requires -network"); 3778 return (1); 3779 } 3780 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 3781 syslog(LOG_ERR, "-network requires mask specification"); 3782 return (1); 3783 } 3784 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3785 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3786 return (1); 3787 } 3788 if (v4root_phase > 0 && 3789 (opt_flags & 3790 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3791 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3792 return (1); 3793 } 3794 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3795 syslog(LOG_ERR, "-alldirs has multiple directories"); 3796 return (1); 3797 } 3798 return (0); 3799 } 3800 3801 static int 3802 check_path_component(const char *path, char **err) 3803 { 3804 struct stat sb; 3805 3806 if (lstat(path, &sb)) { 3807 asprintf(err, "%s: lstat() failed: %s.\n", 3808 path, strerror(errno)); 3809 return (0); 3810 } 3811 3812 switch (sb.st_mode & S_IFMT) { 3813 case S_IFDIR: 3814 return (1); 3815 case S_IFLNK: 3816 asprintf(err, "%s: path is a symbolic link.\n", path); 3817 break; 3818 case S_IFREG: 3819 asprintf(err, "%s: path is a file rather than a directory.\n", 3820 path); 3821 break; 3822 default: 3823 asprintf(err, "%s: path is not a directory.\n", path); 3824 } 3825 3826 return (0); 3827 } 3828 3829 /* 3830 * Check each path component for the presence of symbolic links. Return true 3831 */ 3832 static int 3833 check_dirpath(char *dirp, char **err) 3834 { 3835 char *cp; 3836 3837 cp = dirp + 1; 3838 while (*cp) { 3839 if (*cp == '/') { 3840 *cp = '\0'; 3841 3842 if (!check_path_component(dirp, err)) { 3843 *cp = '/'; 3844 return (0); 3845 } 3846 3847 *cp = '/'; 3848 } 3849 cp++; 3850 } 3851 3852 if (!check_path_component(dirp, err)) 3853 return (0); 3854 3855 return (1); 3856 } 3857 3858 /* 3859 * Populate statfs information. Return true on success. 3860 */ 3861 static int 3862 check_statfs(const char *dirp, struct statfs *fsb, char **err) 3863 { 3864 if (statfs(dirp, fsb)) { 3865 asprintf(err, "%s: statfs() failed: %s\n", dirp, 3866 strerror(errno)); 3867 return (0); 3868 } 3869 3870 return (1); 3871 } 3872 3873 /* 3874 * Make a netmask according to the specified prefix length. The ss_family 3875 * and other non-address fields must be initialised before calling this. 3876 */ 3877 static int 3878 makemask(struct sockaddr_storage *ssp, int bitlen) 3879 { 3880 u_char *p; 3881 int bits, i, len; 3882 3883 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3884 return (-1); 3885 if (bitlen > len * CHAR_BIT) 3886 return (-1); 3887 3888 for (i = 0; i < len; i++) { 3889 bits = MIN(CHAR_BIT, bitlen); 3890 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3891 bitlen -= bits; 3892 } 3893 return 0; 3894 } 3895 3896 /* 3897 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 3898 * is acceptable (i.e. of the form 1...10....0). 3899 */ 3900 static int 3901 checkmask(struct sockaddr *sa) 3902 { 3903 u_char *mask; 3904 int i, len; 3905 3906 if ((mask = sa_rawaddr(sa, &len)) == NULL) 3907 return (-1); 3908 3909 for (i = 0; i < len; i++) 3910 if (mask[i] != 0xff) 3911 break; 3912 if (i < len) { 3913 if (~mask[i] & (u_char)(~mask[i] + 1)) 3914 return (-1); 3915 i++; 3916 } 3917 for (; i < len; i++) 3918 if (mask[i] != 0) 3919 return (-1); 3920 return (0); 3921 } 3922 3923 /* 3924 * Compare two sockaddrs according to a specified mask. Return zero if 3925 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 3926 * If samask is NULL, perform a full comparison. 3927 */ 3928 static int 3929 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 3930 { 3931 unsigned char *p1, *p2, *mask; 3932 int len, i; 3933 3934 if (sa1->sa_family != sa2->sa_family || 3935 (p1 = sa_rawaddr(sa1, &len)) == NULL || 3936 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 3937 return (1); 3938 3939 switch (sa1->sa_family) { 3940 case AF_INET6: 3941 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 3942 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 3943 return (1); 3944 break; 3945 } 3946 3947 /* Simple binary comparison if no mask specified. */ 3948 if (samask == NULL) 3949 return (memcmp(p1, p2, len)); 3950 3951 /* Set up the mask, and do a mask-based comparison. */ 3952 if (sa1->sa_family != samask->sa_family || 3953 (mask = sa_rawaddr(samask, NULL)) == NULL) 3954 return (1); 3955 3956 for (i = 0; i < len; i++) 3957 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3958 return (1); 3959 return (0); 3960 } 3961 3962 /* 3963 * Return a pointer to the part of the sockaddr that contains the 3964 * raw address, and set *nbytes to its length in bytes. Returns 3965 * NULL if the address family is unknown. 3966 */ 3967 static void * 3968 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3969 void *p; 3970 int len; 3971 3972 switch (sa->sa_family) { 3973 case AF_INET: 3974 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3975 p = &((struct sockaddr_in *)sa)->sin_addr; 3976 break; 3977 case AF_INET6: 3978 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3979 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3980 break; 3981 default: 3982 p = NULL; 3983 len = 0; 3984 } 3985 3986 if (nbytes != NULL) 3987 *nbytes = len; 3988 return (p); 3989 } 3990 3991 static void 3992 huphandler(int sig __unused) 3993 { 3994 3995 got_sighup = 1; 3996 } 3997 3998 static void 3999 terminate(int sig __unused) 4000 { 4001 pidfile_remove(pfh); 4002 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 4003 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 4004 exit (0); 4005 } 4006 4007 static void 4008 cp_cred(struct expcred *outcr, struct expcred *incr) 4009 { 4010 4011 outcr->cr_uid = incr->cr_uid; 4012 outcr->cr_ngroups = incr->cr_ngroups; 4013 if (outcr->cr_ngroups > SMALLNGROUPS) 4014 outcr->cr_groups = malloc(outcr->cr_ngroups * sizeof(gid_t)); 4015 else 4016 outcr->cr_groups = outcr->cr_smallgrps; 4017 memcpy(outcr->cr_groups, incr->cr_groups, incr->cr_ngroups * 4018 sizeof(gid_t)); 4019 } 4020