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