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/fcntl.h> 52 #include <sys/fnv_hash.h> 53 #include <sys/linker.h> 54 #include <sys/module.h> 55 #include <sys/mount.h> 56 #include <sys/queue.h> 57 #include <sys/stat.h> 58 #include <sys/sysctl.h> 59 #include <sys/syslog.h> 60 61 #include <rpc/rpc.h> 62 #include <rpc/rpc_com.h> 63 #include <rpc/pmap_clnt.h> 64 #include <rpc/pmap_prot.h> 65 #include <rpcsvc/mount.h> 66 #include <nfs/nfsproto.h> 67 #include <nfs/nfssvc.h> 68 #include <nfsserver/nfs.h> 69 70 #include <fs/nfs/nfsport.h> 71 72 #include <arpa/inet.h> 73 74 #include <ctype.h> 75 #include <err.h> 76 #include <errno.h> 77 #include <grp.h> 78 #include <libutil.h> 79 #include <limits.h> 80 #include <netdb.h> 81 #include <pwd.h> 82 #include <signal.h> 83 #include <stdio.h> 84 #include <stdlib.h> 85 #include <string.h> 86 #include <unistd.h> 87 #include "pathnames.h" 88 #include "mntopts.h" 89 90 #ifdef DEBUG 91 #include <stdarg.h> 92 #endif 93 94 /* 95 * Structures for keeping the mount list and export list 96 */ 97 struct mountlist { 98 char ml_host[MNTNAMLEN+1]; 99 char ml_dirp[MNTPATHLEN+1]; 100 101 SLIST_ENTRY(mountlist) next; 102 }; 103 104 struct dirlist { 105 struct dirlist *dp_left; 106 struct dirlist *dp_right; 107 int dp_flag; 108 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 109 char *dp_dirp; 110 }; 111 /* dp_flag bits */ 112 #define DP_DEFSET 0x1 113 #define DP_HOSTSET 0x2 114 115 struct exportlist { 116 struct dirlist *ex_dirl; 117 struct dirlist *ex_defdir; 118 struct grouplist *ex_grphead; 119 int ex_flag; 120 fsid_t ex_fs; 121 char *ex_fsdir; 122 char *ex_indexfile; 123 struct xucred ex_defanon; 124 int ex_defexflags; 125 int ex_numsecflavors; 126 int ex_secflavors[MAXSECFLAVORS]; 127 int ex_defnumsecflavors; 128 int ex_defsecflavors[MAXSECFLAVORS]; 129 130 SLIST_ENTRY(exportlist) entries; 131 }; 132 /* ex_flag bits */ 133 #define EX_LINKED 0x1 134 #define EX_DONE 0x2 135 #define EX_DEFSET 0x4 136 #define EX_PUBLICFH 0x8 137 138 SLIST_HEAD(exportlisthead, exportlist); 139 140 struct netmsk { 141 struct sockaddr_storage nt_net; 142 struct sockaddr_storage nt_mask; 143 char *nt_name; 144 }; 145 146 union grouptypes { 147 struct addrinfo *gt_addrinfo; 148 struct netmsk gt_net; 149 }; 150 151 struct grouplist { 152 int gr_type; 153 union grouptypes gr_ptr; 154 struct grouplist *gr_next; 155 struct xucred gr_anon; 156 int gr_exflags; 157 int gr_flag; 158 int gr_numsecflavors; 159 int gr_secflavors[MAXSECFLAVORS]; 160 }; 161 /* Group types */ 162 #define GT_NULL 0x0 163 #define GT_HOST 0x1 164 #define GT_NET 0x2 165 #define GT_DEFAULT 0x3 166 #define GT_IGNORE 0x5 167 168 /* Group flags */ 169 #define GR_FND 0x1 170 171 struct hostlist { 172 int ht_flag; /* Uses DP_xx bits */ 173 struct grouplist *ht_grp; 174 struct hostlist *ht_next; 175 }; 176 177 struct fhreturn { 178 int fhr_flag; 179 int fhr_vers; 180 nfsfh_t fhr_fh; 181 int fhr_numsecflavors; 182 int *fhr_secflavors; 183 }; 184 185 #define GETPORT_MAXTRY 20 /* Max tries to get a port # */ 186 187 /* Global defs */ 188 static char *add_expdir(struct dirlist **, char *, int); 189 static void add_dlist(struct dirlist **, struct dirlist *, 190 struct grouplist *, int, struct exportlist *, 191 struct xucred *, int); 192 static void add_mlist(char *, char *); 193 static int check_dirpath(char *); 194 static int check_options(struct dirlist *); 195 static int checkmask(struct sockaddr *sa); 196 static int chk_host(struct dirlist *, struct sockaddr *, int *, int *, 197 int *, int **); 198 static char *strsep_quote(char **stringp, const char *delim); 199 static int create_service(struct netconfig *nconf); 200 static void complete_service(struct netconfig *nconf, char *port_str); 201 static void clearout_service(void); 202 static void del_mlist(char *hostp, char *dirp); 203 static struct dirlist *dirp_search(struct dirlist *, char *); 204 static int do_export_mount(struct exportlist *, struct statfs *); 205 static int do_mount(struct exportlist *, struct grouplist *, int, 206 struct xucred *, char *, int, struct statfs *, int, int *); 207 static int do_opt(char **, char **, struct exportlist *, 208 struct grouplist *, int *, int *, struct xucred *); 209 static struct exportlist *ex_search(fsid_t *, struct exportlisthead *); 210 static struct exportlist *get_exp(void); 211 static void free_dir(struct dirlist *); 212 static void free_exp(struct exportlist *); 213 static void free_grp(struct grouplist *); 214 static void free_host(struct hostlist *); 215 static void free_v4rootexp(void); 216 static void get_exportlist_one(int); 217 static void get_exportlist(int); 218 static void insert_exports(struct exportlist *, struct exportlisthead *); 219 static void free_exports(struct exportlisthead *); 220 static void read_exportfile(int); 221 static int compare_nmount_exportlist(struct iovec *, int, char *); 222 static int compare_export(struct exportlist *, struct exportlist *); 223 static int compare_cred(struct xucred *, struct xucred *); 224 static int compare_secflavor(int *, int *, int); 225 static void delete_export(struct iovec *, int, struct statfs *, char *); 226 static int get_host(char *, struct grouplist *, struct grouplist *); 227 static struct hostlist *get_ht(void); 228 static int get_line(void); 229 static void get_mountlist(void); 230 static int get_net(char *, struct netmsk *, int); 231 static void getexp_err(struct exportlist *, struct grouplist *, const char *); 232 static struct grouplist *get_grp(void); 233 static void hang_dirp(struct dirlist *, struct grouplist *, 234 struct exportlist *, int, struct xucred *, int); 235 static void huphandler(int sig); 236 static int makemask(struct sockaddr_storage *ssp, int bitlen); 237 static void mntsrv(struct svc_req *, SVCXPRT *); 238 static void nextfield(char **, char **); 239 static void out_of_mem(void); 240 static void parsecred(char *, struct xucred *); 241 static int parsesec(char *, struct exportlist *); 242 static int put_exlist(struct dirlist *, XDR *, struct dirlist *, 243 int *, int); 244 static void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 245 static int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 246 struct sockaddr *samask); 247 static int scan_tree(struct dirlist *, struct sockaddr *); 248 static void usage(void); 249 static int xdr_dir(XDR *, char *); 250 static int xdr_explist(XDR *, caddr_t); 251 static int xdr_explist_brief(XDR *, caddr_t); 252 static int xdr_explist_common(XDR *, caddr_t, int); 253 static int xdr_fhs(XDR *, caddr_t); 254 static int xdr_mlist(XDR *, caddr_t); 255 static void terminate(int); 256 257 #define EXPHASH(f) (fnv_32_buf((f), sizeof(fsid_t), 0) % exphashsize) 258 static struct exportlisthead *exphead = NULL; 259 static struct exportlisthead *oldexphead = NULL; 260 static int exphashsize = 0; 261 static SLIST_HEAD(, mountlist) mlhead = SLIST_HEAD_INITIALIZER(&mlhead); 262 static char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 263 static char **exnames; 264 static char **hosts = NULL; 265 static struct xucred def_anon = { 266 XUCRED_VERSION, 267 (uid_t)65534, 268 1, 269 { (gid_t)65533 }, 270 { NULL } 271 }; 272 static int force_v2 = 0; 273 static int resvport_only = 1; 274 static int nhosts = 0; 275 static int dir_only = 1; 276 static int dolog = 0; 277 static int got_sighup = 0; 278 static int xcreated = 0; 279 280 static char *svcport_str = NULL; 281 static int mallocd_svcport = 0; 282 static int *sock_fd; 283 static int sock_fdcnt; 284 static int sock_fdpos; 285 static int suspend_nfsd = 0; 286 287 static int opt_flags; 288 static int have_v6 = 1; 289 290 static int v4root_phase = 0; 291 static char v4root_dirpath[PATH_MAX + 1]; 292 static struct exportlist *v4root_ep = NULL; 293 static int has_publicfh = 0; 294 static int has_set_publicfh = 0; 295 296 static struct pidfh *pfh = NULL; 297 /* Bits for opt_flags above */ 298 #define OP_MAPROOT 0x01 299 #define OP_MAPALL 0x02 300 /* 0x4 free */ 301 #define OP_MASK 0x08 302 #define OP_NET 0x10 303 #define OP_ALLDIRS 0x40 304 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 305 #define OP_QUIET 0x100 306 #define OP_MASKLEN 0x200 307 #define OP_SEC 0x400 308 309 #ifdef DEBUG 310 static int debug = 1; 311 static void SYSLOG(int, const char *, ...) __printflike(2, 3); 312 #define syslog SYSLOG 313 #else 314 static int debug = 0; 315 #endif 316 317 /* 318 * The LOGDEBUG() syslog() calls are always compiled into the daemon. 319 * To enable them, create a file at _PATH_MOUNTDDEBUG. This file can be empty. 320 * To disable the logging, just delete the file at _PATH_MOUNTDDEBUG. 321 */ 322 static int logdebug = 0; 323 #define LOGDEBUG(format, ...) \ 324 (logdebug ? syslog(LOG_DEBUG, format, ## __VA_ARGS__) : 0) 325 326 /* 327 * Similar to strsep(), but it allows for quoted strings 328 * and escaped characters. 329 * 330 * It returns the string (or NULL, if *stringp is NULL), 331 * which is a de-quoted version of the string if necessary. 332 * 333 * It modifies *stringp in place. 334 */ 335 static char * 336 strsep_quote(char **stringp, const char *delim) 337 { 338 char *srcptr, *dstptr, *retval; 339 char quot = 0; 340 341 if (stringp == NULL || *stringp == NULL) 342 return (NULL); 343 344 srcptr = dstptr = retval = *stringp; 345 346 while (*srcptr) { 347 /* 348 * We're looking for several edge cases here. 349 * First: if we're in quote state (quot != 0), 350 * then we ignore the delim characters, but otherwise 351 * process as normal, unless it is the quote character. 352 * Second: if the current character is a backslash, 353 * we take the next character as-is, without checking 354 * for delim, quote, or backslash. Exception: if the 355 * next character is a NUL, that's the end of the string. 356 * Third: if the character is a quote character, we toggle 357 * quote state. 358 * Otherwise: check the current character for NUL, or 359 * being in delim, and end the string if either is true. 360 */ 361 if (*srcptr == '\\') { 362 srcptr++; 363 /* 364 * The edge case here is if the next character 365 * is NUL, we want to stop processing. But if 366 * it's not NUL, then we simply want to copy it. 367 */ 368 if (*srcptr) { 369 *dstptr++ = *srcptr++; 370 } 371 continue; 372 } 373 if (quot == 0 && (*srcptr == '\'' || *srcptr == '"')) { 374 quot = *srcptr++; 375 continue; 376 } 377 if (quot && *srcptr == quot) { 378 /* End of the quoted part */ 379 quot = 0; 380 srcptr++; 381 continue; 382 } 383 if (!quot && strchr(delim, *srcptr)) 384 break; 385 *dstptr++ = *srcptr++; 386 } 387 388 *stringp = (*srcptr == '\0') ? NULL : srcptr + 1; 389 *dstptr = 0; /* Terminate the string */ 390 return (retval); 391 } 392 393 /* 394 * Mountd server for NFS mount protocol as described in: 395 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 396 * The optional arguments are the exports file name 397 * default: _PATH_EXPORTS 398 * and "-n" to allow nonroot mount. 399 */ 400 int 401 main(int argc, char **argv) 402 { 403 fd_set readfds; 404 struct netconfig *nconf; 405 char *endptr, **hosts_bak; 406 void *nc_handle; 407 pid_t otherpid; 408 in_port_t svcport; 409 int c, k, s; 410 int maxrec = RPC_MAXDATASIZE; 411 int attempt_cnt, port_len, port_pos, ret; 412 char **port_list; 413 414 /* Check that another mountd isn't already running. */ 415 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 416 if (pfh == NULL) { 417 if (errno == EEXIST) 418 errx(1, "mountd already running, pid: %d.", otherpid); 419 warn("cannot open or create pidfile"); 420 } 421 422 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 423 if (s < 0) 424 have_v6 = 0; 425 else 426 close(s); 427 428 while ((c = getopt(argc, argv, "2deh:lnp:rS")) != -1) 429 switch (c) { 430 case '2': 431 force_v2 = 1; 432 break; 433 case 'e': 434 /* now a no-op, since this is the default */ 435 break; 436 case 'n': 437 resvport_only = 0; 438 break; 439 case 'r': 440 dir_only = 0; 441 break; 442 case 'd': 443 debug = debug ? 0 : 1; 444 break; 445 case 'l': 446 dolog = 1; 447 break; 448 case 'p': 449 endptr = NULL; 450 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 451 if (endptr == NULL || *endptr != '\0' || 452 svcport == 0 || svcport >= IPPORT_MAX) 453 usage(); 454 svcport_str = strdup(optarg); 455 break; 456 case 'h': 457 ++nhosts; 458 hosts_bak = hosts; 459 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 460 if (hosts_bak == NULL) { 461 if (hosts != NULL) { 462 for (k = 0; k < nhosts; k++) 463 free(hosts[k]); 464 free(hosts); 465 out_of_mem(); 466 } 467 } 468 hosts = hosts_bak; 469 hosts[nhosts - 1] = strdup(optarg); 470 if (hosts[nhosts - 1] == NULL) { 471 for (k = 0; k < (nhosts - 1); k++) 472 free(hosts[k]); 473 free(hosts); 474 out_of_mem(); 475 } 476 break; 477 case 'S': 478 suspend_nfsd = 1; 479 break; 480 default: 481 usage(); 482 } 483 484 if (modfind("nfsd") < 0) { 485 /* Not present in kernel, try loading it */ 486 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 487 errx(1, "NFS server is not available"); 488 } 489 490 argc -= optind; 491 argv += optind; 492 if (argc > 0) 493 exnames = argv; 494 else 495 exnames = exnames_default; 496 openlog("mountd", LOG_PID, LOG_DAEMON); 497 if (debug) 498 warnx("getting export list"); 499 get_exportlist(0); 500 if (debug) 501 warnx("getting mount list"); 502 get_mountlist(); 503 if (debug) 504 warnx("here we go"); 505 if (debug == 0) { 506 daemon(0, 0); 507 signal(SIGINT, SIG_IGN); 508 signal(SIGQUIT, SIG_IGN); 509 } 510 signal(SIGHUP, huphandler); 511 signal(SIGTERM, terminate); 512 signal(SIGPIPE, SIG_IGN); 513 514 pidfile_write(pfh); 515 516 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 517 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 518 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 519 520 if (!resvport_only) { 521 if (sysctlbyname("vfs.nfsd.nfs_privport", NULL, NULL, 522 &resvport_only, sizeof(resvport_only)) != 0 && 523 errno != ENOENT) { 524 syslog(LOG_ERR, "sysctl: %m"); 525 exit(1); 526 } 527 } 528 529 /* 530 * If no hosts were specified, add a wildcard entry to bind to 531 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the 532 * list. 533 */ 534 if (nhosts == 0) { 535 hosts = malloc(sizeof(char *)); 536 if (hosts == NULL) 537 out_of_mem(); 538 hosts[0] = "*"; 539 nhosts = 1; 540 } else { 541 hosts_bak = hosts; 542 if (have_v6) { 543 hosts_bak = realloc(hosts, (nhosts + 2) * 544 sizeof(char *)); 545 if (hosts_bak == NULL) { 546 for (k = 0; k < nhosts; k++) 547 free(hosts[k]); 548 free(hosts); 549 out_of_mem(); 550 } else 551 hosts = hosts_bak; 552 nhosts += 2; 553 hosts[nhosts - 2] = "::1"; 554 } else { 555 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *)); 556 if (hosts_bak == NULL) { 557 for (k = 0; k < nhosts; k++) 558 free(hosts[k]); 559 free(hosts); 560 out_of_mem(); 561 } else { 562 nhosts += 1; 563 hosts = hosts_bak; 564 } 565 } 566 567 hosts[nhosts - 1] = "127.0.0.1"; 568 } 569 570 attempt_cnt = 1; 571 sock_fdcnt = 0; 572 sock_fd = NULL; 573 port_list = NULL; 574 port_len = 0; 575 nc_handle = setnetconfig(); 576 while ((nconf = getnetconfig(nc_handle))) { 577 if (nconf->nc_flag & NC_VISIBLE) { 578 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 579 "inet6") == 0) { 580 /* DO NOTHING */ 581 } else { 582 ret = create_service(nconf); 583 if (ret == 1) 584 /* Ignore this call */ 585 continue; 586 if (ret < 0) { 587 /* 588 * Failed to bind port, so close off 589 * all sockets created and try again 590 * if the port# was dynamically 591 * assigned via bind(2). 592 */ 593 clearout_service(); 594 if (mallocd_svcport != 0 && 595 attempt_cnt < GETPORT_MAXTRY) { 596 free(svcport_str); 597 svcport_str = NULL; 598 mallocd_svcport = 0; 599 } else { 600 errno = EADDRINUSE; 601 syslog(LOG_ERR, 602 "bindresvport_sa: %m"); 603 exit(1); 604 } 605 606 /* Start over at the first service. */ 607 free(sock_fd); 608 sock_fdcnt = 0; 609 sock_fd = NULL; 610 nc_handle = setnetconfig(); 611 attempt_cnt++; 612 } else if (mallocd_svcport != 0 && 613 attempt_cnt == GETPORT_MAXTRY) { 614 /* 615 * For the last attempt, allow 616 * different port #s for each nconf 617 * by saving the svcport_str and 618 * setting it back to NULL. 619 */ 620 port_list = realloc(port_list, 621 (port_len + 1) * sizeof(char *)); 622 if (port_list == NULL) 623 out_of_mem(); 624 port_list[port_len++] = svcport_str; 625 svcport_str = NULL; 626 mallocd_svcport = 0; 627 } 628 } 629 } 630 } 631 632 /* 633 * Successfully bound the ports, so call complete_service() to 634 * do the rest of the setup on the service(s). 635 */ 636 sock_fdpos = 0; 637 port_pos = 0; 638 nc_handle = setnetconfig(); 639 while ((nconf = getnetconfig(nc_handle))) { 640 if (nconf->nc_flag & NC_VISIBLE) { 641 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 642 "inet6") == 0) { 643 /* DO NOTHING */ 644 } else if (port_list != NULL) { 645 if (port_pos >= port_len) { 646 syslog(LOG_ERR, "too many port#s"); 647 exit(1); 648 } 649 complete_service(nconf, port_list[port_pos++]); 650 } else 651 complete_service(nconf, svcport_str); 652 } 653 } 654 endnetconfig(nc_handle); 655 free(sock_fd); 656 if (port_list != NULL) { 657 for (port_pos = 0; port_pos < port_len; port_pos++) 658 free(port_list[port_pos]); 659 free(port_list); 660 } 661 662 if (xcreated == 0) { 663 syslog(LOG_ERR, "could not create any services"); 664 exit(1); 665 } 666 667 /* Expand svc_run() here so that we can call get_exportlist(). */ 668 for (;;) { 669 if (got_sighup) { 670 get_exportlist(1); 671 got_sighup = 0; 672 } 673 readfds = svc_fdset; 674 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) { 675 case -1: 676 if (errno == EINTR) 677 continue; 678 syslog(LOG_ERR, "mountd died: select: %m"); 679 exit(1); 680 case 0: 681 continue; 682 default: 683 svc_getreqset(&readfds); 684 } 685 } 686 } 687 688 /* 689 * This routine creates and binds sockets on the appropriate 690 * addresses. It gets called one time for each transport. 691 * It returns 0 upon success, 1 for ingore the call and -1 to indicate 692 * bind failed with EADDRINUSE. 693 * Any file descriptors that have been created are stored in sock_fd and 694 * the total count of them is maintained in sock_fdcnt. 695 */ 696 static int 697 create_service(struct netconfig *nconf) 698 { 699 struct addrinfo hints, *res = NULL; 700 struct sockaddr_in *sin; 701 struct sockaddr_in6 *sin6; 702 struct __rpc_sockinfo si; 703 int aicode; 704 int fd; 705 int nhostsbak; 706 int one = 1; 707 int r; 708 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 709 int mallocd_res; 710 711 if ((nconf->nc_semantics != NC_TPI_CLTS) && 712 (nconf->nc_semantics != NC_TPI_COTS) && 713 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 714 return (1); /* not my type */ 715 716 /* 717 * XXX - using RPC library internal functions. 718 */ 719 if (!__rpc_nconf2sockinfo(nconf, &si)) { 720 syslog(LOG_ERR, "cannot get information for %s", 721 nconf->nc_netid); 722 return (1); 723 } 724 725 /* Get mountd's address on this transport */ 726 memset(&hints, 0, sizeof hints); 727 hints.ai_family = si.si_af; 728 hints.ai_socktype = si.si_socktype; 729 hints.ai_protocol = si.si_proto; 730 731 /* 732 * Bind to specific IPs if asked to 733 */ 734 nhostsbak = nhosts; 735 while (nhostsbak > 0) { 736 --nhostsbak; 737 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int)); 738 if (sock_fd == NULL) 739 out_of_mem(); 740 sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */ 741 mallocd_res = 0; 742 743 hints.ai_flags = AI_PASSIVE; 744 745 /* 746 * XXX - using RPC library internal functions. 747 */ 748 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 749 int non_fatal = 0; 750 if (errno == EAFNOSUPPORT && 751 nconf->nc_semantics != NC_TPI_CLTS) 752 non_fatal = 1; 753 754 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 755 "cannot create socket for %s", nconf->nc_netid); 756 if (non_fatal != 0) 757 continue; 758 exit(1); 759 } 760 761 switch (hints.ai_family) { 762 case AF_INET: 763 if (inet_pton(AF_INET, hosts[nhostsbak], 764 host_addr) == 1) { 765 hints.ai_flags |= AI_NUMERICHOST; 766 } else { 767 /* 768 * Skip if we have an AF_INET6 address. 769 */ 770 if (inet_pton(AF_INET6, hosts[nhostsbak], 771 host_addr) == 1) { 772 close(fd); 773 continue; 774 } 775 } 776 break; 777 case AF_INET6: 778 if (inet_pton(AF_INET6, hosts[nhostsbak], 779 host_addr) == 1) { 780 hints.ai_flags |= AI_NUMERICHOST; 781 } else { 782 /* 783 * Skip if we have an AF_INET address. 784 */ 785 if (inet_pton(AF_INET, hosts[nhostsbak], 786 host_addr) == 1) { 787 close(fd); 788 continue; 789 } 790 } 791 792 /* 793 * We're doing host-based access checks here, so don't 794 * allow v4-in-v6 to confuse things. The kernel will 795 * disable it by default on NFS sockets too. 796 */ 797 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 798 sizeof one) < 0) { 799 syslog(LOG_ERR, 800 "can't disable v4-in-v6 on IPv6 socket"); 801 exit(1); 802 } 803 break; 804 default: 805 break; 806 } 807 808 /* 809 * If no hosts were specified, just bind to INADDR_ANY 810 */ 811 if (strcmp("*", hosts[nhostsbak]) == 0) { 812 if (svcport_str == NULL) { 813 res = malloc(sizeof(struct addrinfo)); 814 if (res == NULL) 815 out_of_mem(); 816 mallocd_res = 1; 817 res->ai_flags = hints.ai_flags; 818 res->ai_family = hints.ai_family; 819 res->ai_protocol = hints.ai_protocol; 820 switch (res->ai_family) { 821 case AF_INET: 822 sin = malloc(sizeof(struct sockaddr_in)); 823 if (sin == NULL) 824 out_of_mem(); 825 sin->sin_family = AF_INET; 826 sin->sin_port = htons(0); 827 sin->sin_addr.s_addr = htonl(INADDR_ANY); 828 res->ai_addr = (struct sockaddr*) sin; 829 res->ai_addrlen = (socklen_t) 830 sizeof(struct sockaddr_in); 831 break; 832 case AF_INET6: 833 sin6 = malloc(sizeof(struct sockaddr_in6)); 834 if (sin6 == NULL) 835 out_of_mem(); 836 sin6->sin6_family = AF_INET6; 837 sin6->sin6_port = htons(0); 838 sin6->sin6_addr = in6addr_any; 839 res->ai_addr = (struct sockaddr*) sin6; 840 res->ai_addrlen = (socklen_t) 841 sizeof(struct sockaddr_in6); 842 break; 843 default: 844 syslog(LOG_ERR, "bad addr fam %d", 845 res->ai_family); 846 exit(1); 847 } 848 } else { 849 if ((aicode = getaddrinfo(NULL, svcport_str, 850 &hints, &res)) != 0) { 851 syslog(LOG_ERR, 852 "cannot get local address for %s: %s", 853 nconf->nc_netid, 854 gai_strerror(aicode)); 855 close(fd); 856 continue; 857 } 858 } 859 } else { 860 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 861 &hints, &res)) != 0) { 862 syslog(LOG_ERR, 863 "cannot get local address for %s: %s", 864 nconf->nc_netid, gai_strerror(aicode)); 865 close(fd); 866 continue; 867 } 868 } 869 870 /* Store the fd. */ 871 sock_fd[sock_fdcnt - 1] = fd; 872 873 /* Now, attempt the bind. */ 874 r = bindresvport_sa(fd, res->ai_addr); 875 if (r != 0) { 876 if (errno == EADDRINUSE && mallocd_svcport != 0) { 877 if (mallocd_res != 0) { 878 free(res->ai_addr); 879 free(res); 880 } else 881 freeaddrinfo(res); 882 return (-1); 883 } 884 syslog(LOG_ERR, "bindresvport_sa: %m"); 885 exit(1); 886 } 887 888 if (svcport_str == NULL) { 889 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 890 if (svcport_str == NULL) 891 out_of_mem(); 892 mallocd_svcport = 1; 893 894 if (getnameinfo(res->ai_addr, 895 res->ai_addr->sa_len, NULL, NI_MAXHOST, 896 svcport_str, NI_MAXSERV * sizeof(char), 897 NI_NUMERICHOST | NI_NUMERICSERV)) 898 errx(1, "Cannot get port number"); 899 } 900 if (mallocd_res != 0) { 901 free(res->ai_addr); 902 free(res); 903 } else 904 freeaddrinfo(res); 905 res = NULL; 906 } 907 return (0); 908 } 909 910 /* 911 * Called after all the create_service() calls have succeeded, to complete 912 * the setup and registration. 913 */ 914 static void 915 complete_service(struct netconfig *nconf, char *port_str) 916 { 917 struct addrinfo hints, *res = NULL; 918 struct __rpc_sockinfo si; 919 struct netbuf servaddr; 920 SVCXPRT *transp = NULL; 921 int aicode, fd, nhostsbak; 922 int registered = 0; 923 924 if ((nconf->nc_semantics != NC_TPI_CLTS) && 925 (nconf->nc_semantics != NC_TPI_COTS) && 926 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 927 return; /* not my type */ 928 929 /* 930 * XXX - using RPC library internal functions. 931 */ 932 if (!__rpc_nconf2sockinfo(nconf, &si)) { 933 syslog(LOG_ERR, "cannot get information for %s", 934 nconf->nc_netid); 935 return; 936 } 937 938 nhostsbak = nhosts; 939 while (nhostsbak > 0) { 940 --nhostsbak; 941 if (sock_fdpos >= sock_fdcnt) { 942 /* Should never happen. */ 943 syslog(LOG_ERR, "Ran out of socket fd's"); 944 return; 945 } 946 fd = sock_fd[sock_fdpos++]; 947 if (fd < 0) 948 continue; 949 950 /* 951 * Using -1 tells listen(2) to use 952 * kern.ipc.soacceptqueue for the backlog. 953 */ 954 if (nconf->nc_semantics != NC_TPI_CLTS) 955 listen(fd, -1); 956 957 if (nconf->nc_semantics == NC_TPI_CLTS ) 958 transp = svc_dg_create(fd, 0, 0); 959 else 960 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 961 RPC_MAXDATASIZE); 962 963 if (transp != (SVCXPRT *) NULL) { 964 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS, mntsrv, 965 NULL)) 966 syslog(LOG_ERR, 967 "can't register %s MOUNTVERS service", 968 nconf->nc_netid); 969 if (!force_v2) { 970 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS3, 971 mntsrv, NULL)) 972 syslog(LOG_ERR, 973 "can't register %s MOUNTVERS3 service", 974 nconf->nc_netid); 975 } 976 } else 977 syslog(LOG_WARNING, "can't create %s services", 978 nconf->nc_netid); 979 980 if (registered == 0) { 981 registered = 1; 982 memset(&hints, 0, sizeof hints); 983 hints.ai_flags = AI_PASSIVE; 984 hints.ai_family = si.si_af; 985 hints.ai_socktype = si.si_socktype; 986 hints.ai_protocol = si.si_proto; 987 988 if ((aicode = getaddrinfo(NULL, port_str, &hints, 989 &res)) != 0) { 990 syslog(LOG_ERR, "cannot get local address: %s", 991 gai_strerror(aicode)); 992 exit(1); 993 } 994 995 servaddr.buf = malloc(res->ai_addrlen); 996 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 997 servaddr.len = res->ai_addrlen; 998 999 rpcb_set(MOUNTPROG, MOUNTVERS, nconf, &servaddr); 1000 rpcb_set(MOUNTPROG, MOUNTVERS3, nconf, &servaddr); 1001 1002 xcreated++; 1003 freeaddrinfo(res); 1004 } 1005 } /* end while */ 1006 } 1007 1008 /* 1009 * Clear out sockets after a failure to bind one of them, so that the 1010 * cycle of socket creation/binding can start anew. 1011 */ 1012 static void 1013 clearout_service(void) 1014 { 1015 int i; 1016 1017 for (i = 0; i < sock_fdcnt; i++) { 1018 if (sock_fd[i] >= 0) { 1019 shutdown(sock_fd[i], SHUT_RDWR); 1020 close(sock_fd[i]); 1021 } 1022 } 1023 } 1024 1025 static void 1026 usage(void) 1027 { 1028 fprintf(stderr, 1029 "usage: mountd [-2] [-d] [-e] [-l] [-n] [-p <port>] [-r] " 1030 "[-S] [-h <bindip>] [export_file ...]\n"); 1031 exit(1); 1032 } 1033 1034 /* 1035 * The mount rpc service 1036 */ 1037 void 1038 mntsrv(struct svc_req *rqstp, SVCXPRT *transp) 1039 { 1040 struct exportlist *ep; 1041 struct dirlist *dp; 1042 struct fhreturn fhr; 1043 struct stat stb; 1044 struct statfs fsb; 1045 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 1046 int lookup_failed = 1; 1047 struct sockaddr *saddr; 1048 u_short sport; 1049 char rpcpath[MNTPATHLEN + 1], dirpath[MAXPATHLEN]; 1050 int bad = 0, defset, hostset; 1051 sigset_t sighup_mask; 1052 int numsecflavors, *secflavorsp; 1053 1054 sigemptyset(&sighup_mask); 1055 sigaddset(&sighup_mask, SIGHUP); 1056 saddr = svc_getrpccaller(transp)->buf; 1057 switch (saddr->sa_family) { 1058 case AF_INET6: 1059 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 1060 break; 1061 case AF_INET: 1062 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 1063 break; 1064 default: 1065 syslog(LOG_ERR, "request from unknown address family"); 1066 return; 1067 } 1068 switch (rqstp->rq_proc) { 1069 case MOUNTPROC_MNT: 1070 case MOUNTPROC_UMNT: 1071 case MOUNTPROC_UMNTALL: 1072 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, 1073 sizeof host, NULL, 0, 0); 1074 } 1075 getnameinfo(saddr, saddr->sa_len, numerichost, 1076 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 1077 switch (rqstp->rq_proc) { 1078 case NULLPROC: 1079 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 1080 syslog(LOG_ERR, "can't send reply"); 1081 return; 1082 case MOUNTPROC_MNT: 1083 if (sport >= IPPORT_RESERVED && resvport_only) { 1084 syslog(LOG_NOTICE, 1085 "mount request from %s from unprivileged port", 1086 numerichost); 1087 svcerr_weakauth(transp); 1088 return; 1089 } 1090 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1091 syslog(LOG_NOTICE, "undecodable mount request from %s", 1092 numerichost); 1093 svcerr_decode(transp); 1094 return; 1095 } 1096 1097 /* 1098 * Get the real pathname and make sure it is a directory 1099 * or a regular file if the -r option was specified 1100 * and it exists. 1101 */ 1102 if (realpath(rpcpath, dirpath) == NULL || 1103 stat(dirpath, &stb) < 0 || 1104 statfs(dirpath, &fsb) < 0) { 1105 chdir("/"); /* Just in case realpath doesn't */ 1106 syslog(LOG_NOTICE, 1107 "mount request from %s for non existent path %s", 1108 numerichost, dirpath); 1109 if (debug) 1110 warnx("stat failed on %s", dirpath); 1111 bad = ENOENT; /* We will send error reply later */ 1112 } 1113 if (!bad && 1114 !S_ISDIR(stb.st_mode) && 1115 (dir_only || !S_ISREG(stb.st_mode))) { 1116 syslog(LOG_NOTICE, 1117 "mount request from %s for non-directory path %s", 1118 numerichost, dirpath); 1119 if (debug) 1120 warnx("mounting non-directory %s", dirpath); 1121 bad = ENOTDIR; /* We will send error reply later */ 1122 } 1123 1124 /* Check in the exports list */ 1125 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1126 if (bad) 1127 ep = NULL; 1128 else 1129 ep = ex_search(&fsb.f_fsid, exphead); 1130 hostset = defset = 0; 1131 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset, 1132 &numsecflavors, &secflavorsp) || 1133 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 1134 chk_host(dp, saddr, &defset, &hostset, &numsecflavors, 1135 &secflavorsp)) || 1136 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 1137 scan_tree(ep->ex_dirl, saddr) == 0))) { 1138 if (bad) { 1139 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1140 (caddr_t)&bad)) 1141 syslog(LOG_ERR, "can't send reply"); 1142 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1143 return; 1144 } 1145 if (hostset & DP_HOSTSET) { 1146 fhr.fhr_flag = hostset; 1147 fhr.fhr_numsecflavors = numsecflavors; 1148 fhr.fhr_secflavors = secflavorsp; 1149 } else { 1150 fhr.fhr_flag = defset; 1151 fhr.fhr_numsecflavors = ep->ex_defnumsecflavors; 1152 fhr.fhr_secflavors = ep->ex_defsecflavors; 1153 } 1154 fhr.fhr_vers = rqstp->rq_vers; 1155 /* Get the file handle */ 1156 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 1157 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 1158 bad = errno; 1159 syslog(LOG_ERR, "can't get fh for %s", dirpath); 1160 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1161 (caddr_t)&bad)) 1162 syslog(LOG_ERR, "can't send reply"); 1163 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1164 return; 1165 } 1166 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, 1167 (caddr_t)&fhr)) 1168 syslog(LOG_ERR, "can't send reply"); 1169 if (!lookup_failed) 1170 add_mlist(host, dirpath); 1171 else 1172 add_mlist(numerichost, dirpath); 1173 if (debug) 1174 warnx("mount successful"); 1175 if (dolog) 1176 syslog(LOG_NOTICE, 1177 "mount request succeeded from %s for %s", 1178 numerichost, dirpath); 1179 } else { 1180 if (!bad) 1181 bad = EACCES; 1182 syslog(LOG_NOTICE, 1183 "mount request denied from %s for %s", 1184 numerichost, dirpath); 1185 } 1186 1187 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, 1188 (caddr_t)&bad)) 1189 syslog(LOG_ERR, "can't send reply"); 1190 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1191 return; 1192 case MOUNTPROC_DUMP: 1193 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL)) 1194 syslog(LOG_ERR, "can't send reply"); 1195 else if (dolog) 1196 syslog(LOG_NOTICE, 1197 "dump request succeeded from %s", 1198 numerichost); 1199 return; 1200 case MOUNTPROC_UMNT: 1201 if (sport >= IPPORT_RESERVED && resvport_only) { 1202 syslog(LOG_NOTICE, 1203 "umount request from %s from unprivileged port", 1204 numerichost); 1205 svcerr_weakauth(transp); 1206 return; 1207 } 1208 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1209 syslog(LOG_NOTICE, "undecodable umount request from %s", 1210 numerichost); 1211 svcerr_decode(transp); 1212 return; 1213 } 1214 if (realpath(rpcpath, dirpath) == NULL) { 1215 syslog(LOG_NOTICE, "umount request from %s " 1216 "for non existent path %s", 1217 numerichost, dirpath); 1218 } 1219 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1220 syslog(LOG_ERR, "can't send reply"); 1221 if (!lookup_failed) 1222 del_mlist(host, dirpath); 1223 del_mlist(numerichost, dirpath); 1224 if (dolog) 1225 syslog(LOG_NOTICE, 1226 "umount request succeeded from %s for %s", 1227 numerichost, dirpath); 1228 return; 1229 case MOUNTPROC_UMNTALL: 1230 if (sport >= IPPORT_RESERVED && resvport_only) { 1231 syslog(LOG_NOTICE, 1232 "umountall request from %s from unprivileged port", 1233 numerichost); 1234 svcerr_weakauth(transp); 1235 return; 1236 } 1237 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1238 syslog(LOG_ERR, "can't send reply"); 1239 if (!lookup_failed) 1240 del_mlist(host, NULL); 1241 del_mlist(numerichost, NULL); 1242 if (dolog) 1243 syslog(LOG_NOTICE, 1244 "umountall request succeeded from %s", 1245 numerichost); 1246 return; 1247 case MOUNTPROC_EXPORT: 1248 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL)) 1249 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, 1250 (caddr_t)NULL)) 1251 syslog(LOG_ERR, "can't send reply"); 1252 if (dolog) 1253 syslog(LOG_NOTICE, 1254 "export request succeeded from %s", 1255 numerichost); 1256 return; 1257 default: 1258 svcerr_noproc(transp); 1259 return; 1260 } 1261 } 1262 1263 /* 1264 * Xdr conversion for a dirpath string 1265 */ 1266 static int 1267 xdr_dir(XDR *xdrsp, char *dirp) 1268 { 1269 return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); 1270 } 1271 1272 /* 1273 * Xdr routine to generate file handle reply 1274 */ 1275 static int 1276 xdr_fhs(XDR *xdrsp, caddr_t cp) 1277 { 1278 struct fhreturn *fhrp = (struct fhreturn *)cp; 1279 u_long ok = 0, len, auth; 1280 int i; 1281 1282 if (!xdr_long(xdrsp, &ok)) 1283 return (0); 1284 switch (fhrp->fhr_vers) { 1285 case 1: 1286 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 1287 case 3: 1288 len = NFSX_V3FH; 1289 if (!xdr_long(xdrsp, &len)) 1290 return (0); 1291 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 1292 return (0); 1293 if (fhrp->fhr_numsecflavors) { 1294 if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors)) 1295 return (0); 1296 for (i = 0; i < fhrp->fhr_numsecflavors; i++) 1297 if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i])) 1298 return (0); 1299 return (1); 1300 } else { 1301 auth = AUTH_SYS; 1302 len = 1; 1303 if (!xdr_long(xdrsp, &len)) 1304 return (0); 1305 return (xdr_long(xdrsp, &auth)); 1306 } 1307 } 1308 return (0); 1309 } 1310 1311 static int 1312 xdr_mlist(XDR *xdrsp, caddr_t cp __unused) 1313 { 1314 struct mountlist *mlp; 1315 int true = 1; 1316 int false = 0; 1317 char *strp; 1318 1319 SLIST_FOREACH(mlp, &mlhead, next) { 1320 if (!xdr_bool(xdrsp, &true)) 1321 return (0); 1322 strp = &mlp->ml_host[0]; 1323 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 1324 return (0); 1325 strp = &mlp->ml_dirp[0]; 1326 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1327 return (0); 1328 } 1329 if (!xdr_bool(xdrsp, &false)) 1330 return (0); 1331 return (1); 1332 } 1333 1334 /* 1335 * Xdr conversion for export list 1336 */ 1337 static int 1338 xdr_explist_common(XDR *xdrsp, caddr_t cp __unused, int brief) 1339 { 1340 struct exportlist *ep; 1341 int false = 0; 1342 int putdef; 1343 sigset_t sighup_mask; 1344 int i; 1345 1346 sigemptyset(&sighup_mask); 1347 sigaddset(&sighup_mask, SIGHUP); 1348 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1349 1350 for (i = 0; i < exphashsize; i++) 1351 SLIST_FOREACH(ep, &exphead[i], entries) { 1352 putdef = 0; 1353 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 1354 &putdef, brief)) 1355 goto errout; 1356 if (ep->ex_defdir && putdef == 0 && 1357 put_exlist(ep->ex_defdir, xdrsp, NULL, 1358 &putdef, brief)) 1359 goto errout; 1360 } 1361 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1362 if (!xdr_bool(xdrsp, &false)) 1363 return (0); 1364 return (1); 1365 errout: 1366 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1367 return (0); 1368 } 1369 1370 /* 1371 * Called from xdr_explist() to traverse the tree and export the 1372 * directory paths. 1373 */ 1374 static int 1375 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, 1376 int brief) 1377 { 1378 struct grouplist *grp; 1379 struct hostlist *hp; 1380 int true = 1; 1381 int false = 0; 1382 int gotalldir = 0; 1383 char *strp; 1384 1385 if (dp) { 1386 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1387 return (1); 1388 if (!xdr_bool(xdrsp, &true)) 1389 return (1); 1390 strp = dp->dp_dirp; 1391 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1392 return (1); 1393 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1394 gotalldir = 1; 1395 *putdefp = 1; 1396 } 1397 if (brief) { 1398 if (!xdr_bool(xdrsp, &true)) 1399 return (1); 1400 strp = "(...)"; 1401 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1402 return (1); 1403 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1404 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1405 hp = dp->dp_hosts; 1406 while (hp) { 1407 grp = hp->ht_grp; 1408 if (grp->gr_type == GT_HOST) { 1409 if (!xdr_bool(xdrsp, &true)) 1410 return (1); 1411 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1412 if (!xdr_string(xdrsp, &strp, 1413 MNTNAMLEN)) 1414 return (1); 1415 } else if (grp->gr_type == GT_NET) { 1416 if (!xdr_bool(xdrsp, &true)) 1417 return (1); 1418 strp = grp->gr_ptr.gt_net.nt_name; 1419 if (!xdr_string(xdrsp, &strp, 1420 MNTNAMLEN)) 1421 return (1); 1422 } 1423 hp = hp->ht_next; 1424 if (gotalldir && hp == (struct hostlist *)NULL) { 1425 hp = adp->dp_hosts; 1426 gotalldir = 0; 1427 } 1428 } 1429 } 1430 if (!xdr_bool(xdrsp, &false)) 1431 return (1); 1432 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1433 return (1); 1434 } 1435 return (0); 1436 } 1437 1438 static int 1439 xdr_explist(XDR *xdrsp, caddr_t cp) 1440 { 1441 1442 return xdr_explist_common(xdrsp, cp, 0); 1443 } 1444 1445 static int 1446 xdr_explist_brief(XDR *xdrsp, caddr_t cp) 1447 { 1448 1449 return xdr_explist_common(xdrsp, cp, 1); 1450 } 1451 1452 static char *line; 1453 static size_t linesize; 1454 static FILE *exp_file; 1455 1456 /* 1457 * Get the export list from one, currently open file 1458 */ 1459 static void 1460 get_exportlist_one(int passno) 1461 { 1462 struct exportlist *ep; 1463 struct grouplist *grp, *tgrp, *savgrp; 1464 struct dirlist *dirhead; 1465 struct statfs fsb; 1466 struct xucred anon; 1467 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1468 int len, has_host, exflags, got_nondir, dirplen, netgrp; 1469 1470 v4root_phase = 0; 1471 dirhead = (struct dirlist *)NULL; 1472 while (get_line()) { 1473 if (debug) 1474 warnx("got line %s", line); 1475 cp = line; 1476 nextfield(&cp, &endcp); 1477 if (*cp == '#') 1478 goto nextline; 1479 1480 /* 1481 * Set defaults. 1482 */ 1483 has_host = FALSE; 1484 anon = def_anon; 1485 exflags = MNT_EXPORTED; 1486 got_nondir = 0; 1487 opt_flags = 0; 1488 ep = (struct exportlist *)NULL; 1489 dirp = NULL; 1490 1491 /* 1492 * Handle the V4 root dir. 1493 */ 1494 if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') { 1495 /* 1496 * V4: just indicates that it is the v4 root point, 1497 * so skip over that and set v4root_phase. 1498 */ 1499 if (v4root_phase > 0) { 1500 syslog(LOG_ERR, "V4:duplicate line, ignored"); 1501 goto nextline; 1502 } 1503 v4root_phase = 1; 1504 cp += 3; 1505 nextfield(&cp, &endcp); 1506 } 1507 1508 /* 1509 * Create new exports list entry 1510 */ 1511 len = endcp-cp; 1512 tgrp = grp = get_grp(); 1513 while (len > 0) { 1514 if (len > MNTNAMLEN) { 1515 getexp_err(ep, tgrp, "mountpoint too long"); 1516 goto nextline; 1517 } 1518 if (*cp == '-') { 1519 if (ep == (struct exportlist *)NULL) { 1520 getexp_err(ep, tgrp, 1521 "flag before export path definition"); 1522 goto nextline; 1523 } 1524 if (debug) 1525 warnx("doing opt %s", cp); 1526 got_nondir = 1; 1527 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1528 &exflags, &anon)) { 1529 getexp_err(ep, tgrp, NULL); 1530 goto nextline; 1531 } 1532 } else if (*cp == '/') { 1533 savedc = *endcp; 1534 *endcp = '\0'; 1535 if (v4root_phase > 1) { 1536 if (dirp != NULL) { 1537 getexp_err(ep, tgrp, "Multiple V4 dirs"); 1538 goto nextline; 1539 } 1540 } 1541 if (check_dirpath(cp) && 1542 statfs(cp, &fsb) >= 0) { 1543 if ((fsb.f_flags & MNT_AUTOMOUNTED) != 0) 1544 syslog(LOG_ERR, "Warning: exporting of " 1545 "automounted fs %s not supported", cp); 1546 if (got_nondir) { 1547 getexp_err(ep, tgrp, "dirs must be first"); 1548 goto nextline; 1549 } 1550 if (v4root_phase == 1) { 1551 if (dirp != NULL) { 1552 getexp_err(ep, tgrp, "Multiple V4 dirs"); 1553 goto nextline; 1554 } 1555 if (strlen(v4root_dirpath) == 0) { 1556 strlcpy(v4root_dirpath, cp, 1557 sizeof (v4root_dirpath)); 1558 } else if (strcmp(v4root_dirpath, cp) 1559 != 0) { 1560 syslog(LOG_ERR, 1561 "different V4 dirpath %s", cp); 1562 getexp_err(ep, tgrp, NULL); 1563 goto nextline; 1564 } 1565 dirp = cp; 1566 v4root_phase = 2; 1567 got_nondir = 1; 1568 ep = get_exp(); 1569 } else { 1570 if (ep) { 1571 if (fsidcmp(&ep->ex_fs, &fsb.f_fsid) 1572 != 0) { 1573 getexp_err(ep, tgrp, 1574 "fsid mismatch"); 1575 goto nextline; 1576 } 1577 } else { 1578 /* 1579 * See if this directory is already 1580 * in the list. 1581 */ 1582 ep = ex_search(&fsb.f_fsid, exphead); 1583 if (ep == (struct exportlist *)NULL) { 1584 ep = get_exp(); 1585 ep->ex_fs = fsb.f_fsid; 1586 ep->ex_fsdir = strdup(fsb.f_mntonname); 1587 if (ep->ex_fsdir == NULL) 1588 out_of_mem(); 1589 if (debug) 1590 warnx( 1591 "making new ep fs=0x%x,0x%x", 1592 fsb.f_fsid.val[0], 1593 fsb.f_fsid.val[1]); 1594 } else if (debug) 1595 warnx("found ep fs=0x%x,0x%x", 1596 fsb.f_fsid.val[0], 1597 fsb.f_fsid.val[1]); 1598 } 1599 1600 /* 1601 * Add dirpath to export mount point. 1602 */ 1603 dirp = add_expdir(&dirhead, cp, len); 1604 dirplen = len; 1605 } 1606 } else { 1607 getexp_err(ep, tgrp, 1608 "symbolic link in export path or statfs failed"); 1609 goto nextline; 1610 } 1611 *endcp = savedc; 1612 } else { 1613 savedc = *endcp; 1614 *endcp = '\0'; 1615 got_nondir = 1; 1616 if (ep == (struct exportlist *)NULL) { 1617 getexp_err(ep, tgrp, 1618 "host(s) before export path definition"); 1619 goto nextline; 1620 } 1621 1622 /* 1623 * Get the host or netgroup. 1624 */ 1625 setnetgrent(cp); 1626 netgrp = getnetgrent(&hst, &usr, &dom); 1627 do { 1628 if (has_host) { 1629 grp->gr_next = get_grp(); 1630 grp = grp->gr_next; 1631 } 1632 if (netgrp) { 1633 if (hst == 0) { 1634 syslog(LOG_ERR, 1635 "null hostname in netgroup %s, skipping", cp); 1636 grp->gr_type = GT_IGNORE; 1637 } else if (get_host(hst, grp, tgrp)) { 1638 syslog(LOG_ERR, 1639 "bad host %s in netgroup %s, skipping", hst, cp); 1640 grp->gr_type = GT_IGNORE; 1641 } 1642 } else if (get_host(cp, grp, tgrp)) { 1643 syslog(LOG_ERR, "bad host %s, skipping", cp); 1644 grp->gr_type = GT_IGNORE; 1645 } 1646 has_host = TRUE; 1647 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1648 endnetgrent(); 1649 *endcp = savedc; 1650 } 1651 cp = endcp; 1652 nextfield(&cp, &endcp); 1653 len = endcp - cp; 1654 } 1655 if (check_options(dirhead)) { 1656 getexp_err(ep, tgrp, NULL); 1657 goto nextline; 1658 } 1659 if (!has_host) { 1660 grp->gr_type = GT_DEFAULT; 1661 if (debug) 1662 warnx("adding a default entry"); 1663 1664 /* 1665 * Don't allow a network export coincide with a list of 1666 * host(s) on the same line. 1667 */ 1668 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1669 getexp_err(ep, tgrp, "network/host conflict"); 1670 goto nextline; 1671 1672 /* 1673 * If an export list was specified on this line, make sure 1674 * that we have at least one valid entry, otherwise skip it. 1675 */ 1676 } else { 1677 grp = tgrp; 1678 while (grp && grp->gr_type == GT_IGNORE) 1679 grp = grp->gr_next; 1680 if (! grp) { 1681 getexp_err(ep, tgrp, "no valid entries"); 1682 goto nextline; 1683 } 1684 } 1685 1686 if (v4root_phase == 1) { 1687 getexp_err(ep, tgrp, "V4:root, no dirp, ignored"); 1688 goto nextline; 1689 } 1690 1691 /* 1692 * Loop through hosts, pushing the exports into the kernel. 1693 * After loop, tgrp points to the start of the list and 1694 * grp points to the last entry in the list. 1695 * Do not do the do_mount() for passno == 1, since the 1696 * second pass will do it, as required. 1697 */ 1698 grp = tgrp; 1699 do { 1700 grp->gr_exflags = exflags; 1701 grp->gr_anon = anon; 1702 if (v4root_phase == 2 && passno == 0) 1703 LOGDEBUG("do_mount v4root"); 1704 if (passno == 0 && do_mount(ep, grp, exflags, &anon, 1705 dirp, dirplen, &fsb, ep->ex_numsecflavors, 1706 ep->ex_secflavors)) { 1707 getexp_err(ep, tgrp, NULL); 1708 goto nextline; 1709 } 1710 } while (grp->gr_next && (grp = grp->gr_next)); 1711 1712 /* 1713 * For V4: don't enter in mount lists. 1714 */ 1715 if (v4root_phase > 0 && v4root_phase <= 2) { 1716 /* 1717 * These structures are used for the reload, 1718 * so save them for that case. Otherwise, just 1719 * free them up now. 1720 */ 1721 if (passno == 1 && ep != NULL) { 1722 savgrp = tgrp; 1723 while (tgrp != NULL) { 1724 /* 1725 * Save the security flavors and exflags 1726 * for this host set in the groups. 1727 */ 1728 tgrp->gr_numsecflavors = 1729 ep->ex_numsecflavors; 1730 if (ep->ex_numsecflavors > 0) 1731 memcpy(tgrp->gr_secflavors, 1732 ep->ex_secflavors, 1733 sizeof(ep->ex_secflavors)); 1734 tgrp = tgrp->gr_next; 1735 } 1736 if (v4root_ep == NULL) { 1737 v4root_ep = ep; 1738 ep = NULL; /* Don't free below. */ 1739 } 1740 grp->gr_next = v4root_ep->ex_grphead; 1741 v4root_ep->ex_grphead = savgrp; 1742 } 1743 if (ep != NULL) 1744 free_exp(ep); 1745 while (tgrp != NULL) { 1746 grp = tgrp; 1747 tgrp = tgrp->gr_next; 1748 free_grp(grp); 1749 } 1750 goto nextline; 1751 } 1752 1753 /* 1754 * Success. Update the data structures. 1755 */ 1756 if (has_host) { 1757 hang_dirp(dirhead, tgrp, ep, opt_flags, &anon, exflags); 1758 grp->gr_next = ep->ex_grphead; 1759 ep->ex_grphead = tgrp; 1760 } else { 1761 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1762 opt_flags, &anon, exflags); 1763 free_grp(grp); 1764 } 1765 dirhead = (struct dirlist *)NULL; 1766 if ((ep->ex_flag & EX_LINKED) == 0) { 1767 insert_exports(ep, exphead); 1768 1769 ep->ex_flag |= EX_LINKED; 1770 } 1771 nextline: 1772 v4root_phase = 0; 1773 if (dirhead) { 1774 free_dir(dirhead); 1775 dirhead = (struct dirlist *)NULL; 1776 } 1777 } 1778 } 1779 1780 /* 1781 * Get the export list from all specified files 1782 */ 1783 static void 1784 get_exportlist(int passno) 1785 { 1786 struct export_args export; 1787 struct iovec *iov; 1788 struct statfs *mntbufp; 1789 char errmsg[255]; 1790 int num, i; 1791 int iovlen; 1792 struct nfsex_args eargs; 1793 FILE *debug_file; 1794 1795 if ((debug_file = fopen(_PATH_MOUNTDDEBUG, "r")) != NULL) { 1796 fclose(debug_file); 1797 logdebug = 1; 1798 } else 1799 logdebug = 0; 1800 LOGDEBUG("passno=%d", passno); 1801 v4root_dirpath[0] = '\0'; 1802 free_v4rootexp(); 1803 if (passno == 1) { 1804 /* 1805 * Save the current lists as old ones, so that the new lists 1806 * can be compared with the old ones in the 2nd pass. 1807 */ 1808 for (i = 0; i < exphashsize; i++) { 1809 SLIST_FIRST(&oldexphead[i]) = SLIST_FIRST(&exphead[i]); 1810 SLIST_INIT(&exphead[i]); 1811 } 1812 1813 /* Note that the public fh has not yet been set. */ 1814 has_set_publicfh = 0; 1815 1816 /* Read the export file(s) and process them */ 1817 read_exportfile(passno); 1818 } else { 1819 /* 1820 * Just make the old lists empty. 1821 * exphashsize == 0 for the first call, before oldexphead 1822 * has been initialized-->loop won't be executed. 1823 */ 1824 for (i = 0; i < exphashsize; i++) 1825 SLIST_INIT(&oldexphead[i]); 1826 } 1827 1828 bzero(&export, sizeof(export)); 1829 export.ex_flags = MNT_DELEXPORT; 1830 iov = NULL; 1831 iovlen = 0; 1832 bzero(errmsg, sizeof(errmsg)); 1833 1834 if (suspend_nfsd != 0) 1835 (void)nfssvc(NFSSVC_SUSPENDNFSD, NULL); 1836 /* 1837 * Delete the old V4 root dir. 1838 */ 1839 bzero(&eargs, sizeof (eargs)); 1840 eargs.export.ex_flags = MNT_DELEXPORT; 1841 if (nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 && 1842 errno != ENOENT) 1843 syslog(LOG_ERR, "Can't delete exports for V4:"); 1844 1845 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1846 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1847 build_iovec(&iov, &iovlen, "from", NULL, 0); 1848 build_iovec(&iov, &iovlen, "update", NULL, 0); 1849 build_iovec(&iov, &iovlen, "export", &export, 1850 sizeof(export)); 1851 build_iovec(&iov, &iovlen, "errmsg", errmsg, 1852 sizeof(errmsg)); 1853 1854 /* 1855 * For passno == 1, compare the old and new lists updating the kernel 1856 * exports for any cases that have changed. 1857 * This call is doing the second pass through the lists. 1858 * If it fails, fall back on the bulk reload. 1859 */ 1860 if (passno == 1 && compare_nmount_exportlist(iov, iovlen, errmsg) == 1861 0) { 1862 LOGDEBUG("compareok"); 1863 /* Free up the old lists. */ 1864 free_exports(oldexphead); 1865 } else { 1866 LOGDEBUG("doing passno=0"); 1867 /* 1868 * Clear flag that notes if a public fh has been exported. 1869 * It is set by do_mount() if MNT_EXPUBLIC is set for the entry. 1870 */ 1871 has_publicfh = 0; 1872 1873 /* exphead == NULL if not yet allocated (first call). */ 1874 if (exphead != NULL) { 1875 /* 1876 * First, get rid of the old lists. 1877 */ 1878 free_exports(exphead); 1879 free_exports(oldexphead); 1880 } 1881 1882 /* 1883 * And delete exports that are in the kernel for all local 1884 * filesystems. 1885 * XXX: Should know how to handle all local exportable 1886 * filesystems. 1887 */ 1888 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1889 1890 /* Allocate hash tables, for first call. */ 1891 if (exphead == NULL) { 1892 /* Target an average linked list length of 10. */ 1893 exphashsize = num / 10; 1894 if (exphashsize < 1) 1895 exphashsize = 1; 1896 else if (exphashsize > 100000) 1897 exphashsize = 100000; 1898 exphead = malloc(exphashsize * sizeof(*exphead)); 1899 oldexphead = malloc(exphashsize * sizeof(*oldexphead)); 1900 if (exphead == NULL || oldexphead == NULL) 1901 errx(1, "Can't malloc hash tables"); 1902 1903 for (i = 0; i < exphashsize; i++) { 1904 SLIST_INIT(&exphead[i]); 1905 SLIST_INIT(&oldexphead[i]); 1906 } 1907 } 1908 1909 for (i = 0; i < num; i++) 1910 delete_export(iov, iovlen, &mntbufp[i], errmsg); 1911 1912 1913 /* Read the export file(s) and process them */ 1914 read_exportfile(0); 1915 } 1916 1917 if (iov != NULL) { 1918 /* Free strings allocated by strdup() in getmntopts.c */ 1919 free(iov[0].iov_base); /* fstype */ 1920 free(iov[2].iov_base); /* fspath */ 1921 free(iov[4].iov_base); /* from */ 1922 free(iov[6].iov_base); /* update */ 1923 free(iov[8].iov_base); /* export */ 1924 free(iov[10].iov_base); /* errmsg */ 1925 1926 /* free iov, allocated by realloc() */ 1927 free(iov); 1928 iovlen = 0; 1929 } 1930 1931 /* 1932 * If there was no public fh, clear any previous one set. 1933 */ 1934 if (has_publicfh == 0) { 1935 LOGDEBUG("clear public fh"); 1936 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1937 } 1938 1939 /* Resume the nfsd. If they weren't suspended, this is harmless. */ 1940 (void)nfssvc(NFSSVC_RESUMENFSD, NULL); 1941 LOGDEBUG("eo get_exportlist"); 1942 } 1943 1944 /* 1945 * Insert an export entry in the appropriate list. 1946 */ 1947 static void 1948 insert_exports(struct exportlist *ep, struct exportlisthead *exhp) 1949 { 1950 uint32_t i; 1951 1952 i = EXPHASH(&ep->ex_fs); 1953 LOGDEBUG("fs=%s hash=%i", ep->ex_fsdir, i); 1954 SLIST_INSERT_HEAD(&exhp[i], ep, entries); 1955 } 1956 1957 /* 1958 * Free up the exports lists passed in as arguments. 1959 */ 1960 static void 1961 free_exports(struct exportlisthead *exhp) 1962 { 1963 struct exportlist *ep, *ep2; 1964 int i; 1965 1966 for (i = 0; i < exphashsize; i++) { 1967 SLIST_FOREACH_SAFE(ep, &exhp[i], entries, ep2) { 1968 SLIST_REMOVE(&exhp[i], ep, exportlist, entries); 1969 free_exp(ep); 1970 } 1971 SLIST_INIT(&exhp[i]); 1972 } 1973 } 1974 1975 /* 1976 * Read the exports file(s) and call get_exportlist_one() for each line. 1977 */ 1978 static void 1979 read_exportfile(int passno) 1980 { 1981 int done, i; 1982 1983 /* 1984 * Read in the exports file and build the list, calling 1985 * nmount() as we go along to push the export rules into the kernel. 1986 */ 1987 done = 0; 1988 for (i = 0; exnames[i] != NULL; i++) { 1989 if (debug) 1990 warnx("reading exports from %s", exnames[i]); 1991 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1992 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1993 continue; 1994 } 1995 get_exportlist_one(passno); 1996 fclose(exp_file); 1997 done++; 1998 } 1999 if (done == 0) { 2000 syslog(LOG_ERR, "can't open any exports file"); 2001 exit(2); 2002 } 2003 } 2004 2005 /* 2006 * Compare the export lists against the old ones and do nmount() operations 2007 * for any cases that have changed. This avoids doing nmount() for entries 2008 * that have not changed. 2009 * Return 0 upon success, 1 otherwise. 2010 */ 2011 static int 2012 compare_nmount_exportlist(struct iovec *iov, int iovlen, char *errmsg) 2013 { 2014 struct exportlist *ep, *oep; 2015 struct grouplist *grp; 2016 struct statfs fs, ofs; 2017 int i, ret; 2018 2019 /* 2020 * Loop through the current list and look for an entry in the old 2021 * list. 2022 * If found, check to see if it the same. 2023 * If it is not the same, delete and re-export. 2024 * Then mark it done on the old list. 2025 * else (not found) 2026 * export it. 2027 * Any entries left in the old list after processing must have their 2028 * exports deleted. 2029 */ 2030 for (i = 0; i < exphashsize; i++) 2031 SLIST_FOREACH(ep, &exphead[i], entries) { 2032 LOGDEBUG("foreach ep=%s", ep->ex_fsdir); 2033 oep = ex_search(&ep->ex_fs, oldexphead); 2034 if (oep != NULL) { 2035 /* 2036 * Check the mount paths are the same. 2037 * If not, return 1 so that the reload of the 2038 * exports will be done in bulk, the 2039 * passno == 0 way. 2040 */ 2041 LOGDEBUG("found old exp"); 2042 if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0) 2043 return (1); 2044 LOGDEBUG("same fsdir"); 2045 /* 2046 * Test to see if the entry is the same. 2047 * If not the same delete exports and 2048 * re-export. 2049 */ 2050 if (compare_export(ep, oep) != 0) { 2051 /* 2052 * Clear has_publicfh if if was set 2053 * in the old exports, but only if it 2054 * has not been set during processing of 2055 * the exports for this pass, as 2056 * indicated by has_set_publicfh. 2057 */ 2058 if (has_set_publicfh == 0 && 2059 (oep->ex_flag & EX_PUBLICFH) != 0) 2060 has_publicfh = 0; 2061 2062 /* Delete and re-export. */ 2063 if (statfs(ep->ex_fsdir, &fs) < 0) 2064 return (1); 2065 delete_export(iov, iovlen, &fs, errmsg); 2066 ret = do_export_mount(ep, &fs); 2067 if (ret != 0) 2068 return (ret); 2069 } 2070 oep->ex_flag |= EX_DONE; 2071 LOGDEBUG("exdone"); 2072 } else { 2073 LOGDEBUG("not found so export"); 2074 /* Not found, so do export. */ 2075 if (statfs(ep->ex_fsdir, &fs) < 0) 2076 return (1); 2077 ret = do_export_mount(ep, &fs); 2078 if (ret != 0) 2079 return (ret); 2080 } 2081 } 2082 2083 /* Delete exports not done. */ 2084 for (i = 0; i < exphashsize; i++) 2085 SLIST_FOREACH(oep, &oldexphead[i], entries) { 2086 if ((oep->ex_flag & EX_DONE) == 0) { 2087 LOGDEBUG("not done delete=%s", oep->ex_fsdir); 2088 if (statfs(oep->ex_fsdir, &ofs) >= 0 && 2089 fsidcmp(&oep->ex_fs, &ofs.f_fsid) == 0) { 2090 LOGDEBUG("do delete"); 2091 /* 2092 * Clear has_publicfh if if was set 2093 * in the old exports, but only if it 2094 * has not been set during processing of 2095 * the exports for this pass, as 2096 * indicated by has_set_publicfh. 2097 */ 2098 if (has_set_publicfh == 0 && 2099 (oep->ex_flag & EX_PUBLICFH) != 0) 2100 has_publicfh = 0; 2101 2102 delete_export(iov, iovlen, &ofs, 2103 errmsg); 2104 } 2105 } 2106 } 2107 2108 /* Do the V4 root exports, as required. */ 2109 grp = NULL; 2110 if (v4root_ep != NULL) 2111 grp = v4root_ep->ex_grphead; 2112 v4root_phase = 2; 2113 while (v4root_ep != NULL && grp != NULL) { 2114 LOGDEBUG("v4root expath=%s", v4root_dirpath); 2115 ret = do_mount(v4root_ep, grp, grp->gr_exflags, &grp->gr_anon, 2116 v4root_dirpath, strlen(v4root_dirpath), &fs, 2117 grp->gr_numsecflavors, grp->gr_secflavors); 2118 if (ret != 0) { 2119 v4root_phase = 0; 2120 return (ret); 2121 } 2122 grp = grp->gr_next; 2123 } 2124 v4root_phase = 0; 2125 free_v4rootexp(); 2126 return (0); 2127 } 2128 2129 /* 2130 * Compare old and current exportlist entries for the fsid and return 0 2131 * if they are the same, 1 otherwise. 2132 */ 2133 static int 2134 compare_export(struct exportlist *ep, struct exportlist *oep) 2135 { 2136 struct grouplist *grp, *ogrp; 2137 2138 if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0) 2139 return (1); 2140 if ((ep->ex_flag & EX_DEFSET) != (oep->ex_flag & EX_DEFSET)) 2141 return (1); 2142 if ((ep->ex_defdir != NULL && oep->ex_defdir == NULL) || 2143 (ep->ex_defdir == NULL && oep->ex_defdir != NULL)) 2144 return (1); 2145 if (ep->ex_defdir != NULL && (ep->ex_defdir->dp_flag & DP_DEFSET) != 2146 (oep->ex_defdir->dp_flag & DP_DEFSET)) 2147 return (1); 2148 if ((ep->ex_flag & EX_DEFSET) != 0 && (ep->ex_defnumsecflavors != 2149 oep->ex_defnumsecflavors || ep->ex_defexflags != 2150 oep->ex_defexflags || compare_cred(&ep->ex_defanon, 2151 &oep->ex_defanon) != 0 || compare_secflavor(ep->ex_defsecflavors, 2152 oep->ex_defsecflavors, ep->ex_defnumsecflavors) != 0)) 2153 return (1); 2154 2155 /* Now, check all the groups. */ 2156 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next) 2157 ogrp->gr_flag = 0; 2158 for (grp = ep->ex_grphead; grp != NULL; grp = grp->gr_next) { 2159 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = 2160 ogrp->gr_next) 2161 if ((ogrp->gr_flag & GR_FND) == 0 && 2162 grp->gr_numsecflavors == ogrp->gr_numsecflavors && 2163 grp->gr_exflags == ogrp->gr_exflags && 2164 compare_cred(&grp->gr_anon, &ogrp->gr_anon) == 0 && 2165 compare_secflavor(grp->gr_secflavors, 2166 ogrp->gr_secflavors, grp->gr_numsecflavors) == 0) 2167 break; 2168 if (ogrp != NULL) 2169 ogrp->gr_flag |= GR_FND; 2170 else 2171 return (1); 2172 } 2173 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next) 2174 if ((ogrp->gr_flag & GR_FND) == 0) 2175 return (1); 2176 return (0); 2177 } 2178 2179 /* 2180 * This algorithm compares two arrays of "n" items. It returns 0 if they are 2181 * the "same" and 1 otherwise. Although suboptimal, it is always safe to 2182 * return 1, which makes compare_nmount_export() reload the exports entry. 2183 * "same" refers to having the same set of values in the two arrays. 2184 * The arrays are in no particular order and duplicates (multiple entries 2185 * in an array with the same value) is allowed. 2186 * The algorithm is inefficient, but the common case of indentical arrays is 2187 * handled first and "n" is normally fairly small. 2188 * Since the two functions need the same algorithm but for arrays of 2189 * different types (gid_t vs int), this is done as a macro. 2190 */ 2191 #define COMPARE_ARRAYS(a1, a2, n) \ 2192 do { \ 2193 int fnd, fndarray[(n)], i, j; \ 2194 /* Handle common case of identical arrays. */ \ 2195 for (i = 0; i < (n); i++) \ 2196 if ((a1)[i] != (a2)[i]) \ 2197 break; \ 2198 if (i == (n)) \ 2199 return (0); \ 2200 for (i = 0; i < (n); i++) \ 2201 fndarray[i] = 0; \ 2202 for (i = 0; i < (n); i++) { \ 2203 fnd = 0; \ 2204 for (j = 0; j < (n); j++) { \ 2205 if ((a1)[i] == (a2)[j]) { \ 2206 fndarray[j] = 1; \ 2207 fnd = 1; \ 2208 } \ 2209 } \ 2210 if (fnd == 0) \ 2211 return (1); \ 2212 } \ 2213 for (i = 0; i < (n); i++) \ 2214 if (fndarray[i] == 0) \ 2215 return (1); \ 2216 return (0); \ 2217 } while (0) 2218 2219 /* 2220 * Compare to struct xucred's. Return 0 if the same and 1 otherwise. 2221 */ 2222 static int 2223 compare_cred(struct xucred *cr0, struct xucred *cr1) 2224 { 2225 2226 if (cr0->cr_uid != cr1->cr_uid || cr0->cr_ngroups != cr1->cr_ngroups) 2227 return (1); 2228 2229 COMPARE_ARRAYS(cr0->cr_groups, cr1->cr_groups, cr0->cr_ngroups); 2230 } 2231 2232 /* 2233 * Compare two lists of security flavors. Return 0 if the same and 1 otherwise. 2234 */ 2235 static int 2236 compare_secflavor(int *sec1, int *sec2, int nsec) 2237 { 2238 2239 COMPARE_ARRAYS(sec1, sec2, nsec); 2240 } 2241 2242 /* 2243 * Delete an exports entry. 2244 */ 2245 static void 2246 delete_export(struct iovec *iov, int iovlen, struct statfs *fsp, char *errmsg) 2247 { 2248 struct xvfsconf vfc; 2249 2250 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 2251 syslog(LOG_ERR, "getvfsbyname() failed for %s", 2252 fsp->f_fstypename); 2253 return; 2254 } 2255 2256 /* 2257 * We do not need to delete "export" flag from 2258 * filesystems that do not have it set. 2259 */ 2260 if (!(fsp->f_flags & MNT_EXPORTED)) 2261 return; 2262 /* 2263 * Do not delete export for network filesystem by 2264 * passing "export" arg to nmount(). 2265 * It only makes sense to do this for local filesystems. 2266 */ 2267 if (vfc.vfc_flags & VFCF_NETWORK) 2268 return; 2269 2270 iov[1].iov_base = fsp->f_fstypename; 2271 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 2272 iov[3].iov_base = fsp->f_mntonname; 2273 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 2274 iov[5].iov_base = fsp->f_mntfromname; 2275 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 2276 errmsg[0] = '\0'; 2277 2278 /* 2279 * EXDEV is returned when path exists but is not a 2280 * mount point. May happens if raced with unmount. 2281 */ 2282 if (nmount(iov, iovlen, fsp->f_flags) < 0 && errno != ENOENT && 2283 errno != ENOTSUP && errno != EXDEV) { 2284 syslog(LOG_ERR, 2285 "can't delete exports for %s: %m %s", 2286 fsp->f_mntonname, errmsg); 2287 } 2288 } 2289 2290 /* 2291 * Allocate an export list element 2292 */ 2293 static struct exportlist * 2294 get_exp(void) 2295 { 2296 struct exportlist *ep; 2297 2298 ep = (struct exportlist *)calloc(1, sizeof (struct exportlist)); 2299 if (ep == (struct exportlist *)NULL) 2300 out_of_mem(); 2301 return (ep); 2302 } 2303 2304 /* 2305 * Allocate a group list element 2306 */ 2307 static struct grouplist * 2308 get_grp(void) 2309 { 2310 struct grouplist *gp; 2311 2312 gp = (struct grouplist *)calloc(1, sizeof (struct grouplist)); 2313 if (gp == (struct grouplist *)NULL) 2314 out_of_mem(); 2315 return (gp); 2316 } 2317 2318 /* 2319 * Clean up upon an error in get_exportlist(). 2320 */ 2321 static void 2322 getexp_err(struct exportlist *ep, struct grouplist *grp, const char *reason) 2323 { 2324 struct grouplist *tgrp; 2325 2326 if (!(opt_flags & OP_QUIET)) { 2327 if (reason != NULL) 2328 syslog(LOG_ERR, "bad exports list line '%s': %s", line, 2329 reason); 2330 else 2331 syslog(LOG_ERR, "bad exports list line '%s'", line); 2332 } 2333 if (ep && (ep->ex_flag & EX_LINKED) == 0) 2334 free_exp(ep); 2335 while (grp) { 2336 tgrp = grp; 2337 grp = grp->gr_next; 2338 free_grp(tgrp); 2339 } 2340 } 2341 2342 /* 2343 * Search the export list for a matching fs. 2344 */ 2345 static struct exportlist * 2346 ex_search(fsid_t *fsid, struct exportlisthead *exhp) 2347 { 2348 struct exportlist *ep; 2349 uint32_t i; 2350 2351 i = EXPHASH(fsid); 2352 SLIST_FOREACH(ep, &exhp[i], entries) { 2353 if (fsidcmp(&ep->ex_fs, fsid) == 0) 2354 return (ep); 2355 } 2356 2357 return (ep); 2358 } 2359 2360 /* 2361 * Add a directory path to the list. 2362 */ 2363 static char * 2364 add_expdir(struct dirlist **dpp, char *cp, int len) 2365 { 2366 struct dirlist *dp; 2367 2368 dp = malloc(sizeof (struct dirlist)); 2369 if (dp == (struct dirlist *)NULL) 2370 out_of_mem(); 2371 dp->dp_left = *dpp; 2372 dp->dp_right = (struct dirlist *)NULL; 2373 dp->dp_flag = 0; 2374 dp->dp_hosts = (struct hostlist *)NULL; 2375 dp->dp_dirp = strndup(cp, len); 2376 if (dp->dp_dirp == NULL) 2377 out_of_mem(); 2378 *dpp = dp; 2379 return (dp->dp_dirp); 2380 } 2381 2382 /* 2383 * Hang the dir list element off the dirpath binary tree as required 2384 * and update the entry for host. 2385 */ 2386 static void 2387 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 2388 int flags, struct xucred *anoncrp, int exflags) 2389 { 2390 struct hostlist *hp; 2391 struct dirlist *dp2; 2392 2393 if (flags & OP_ALLDIRS) { 2394 if (ep->ex_defdir) 2395 free((caddr_t)dp); 2396 else 2397 ep->ex_defdir = dp; 2398 if (grp == (struct grouplist *)NULL) { 2399 ep->ex_flag |= EX_DEFSET; 2400 ep->ex_defdir->dp_flag |= DP_DEFSET; 2401 /* Save the default security flavors list. */ 2402 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2403 if (ep->ex_numsecflavors > 0) 2404 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2405 sizeof(ep->ex_secflavors)); 2406 ep->ex_defanon = *anoncrp; 2407 ep->ex_defexflags = exflags; 2408 } else while (grp) { 2409 hp = get_ht(); 2410 hp->ht_grp = grp; 2411 hp->ht_next = ep->ex_defdir->dp_hosts; 2412 ep->ex_defdir->dp_hosts = hp; 2413 /* Save the security flavors list for this host set. */ 2414 grp->gr_numsecflavors = ep->ex_numsecflavors; 2415 if (ep->ex_numsecflavors > 0) 2416 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2417 sizeof(ep->ex_secflavors)); 2418 grp = grp->gr_next; 2419 } 2420 } else { 2421 2422 /* 2423 * Loop through the directories adding them to the tree. 2424 */ 2425 while (dp) { 2426 dp2 = dp->dp_left; 2427 add_dlist(&ep->ex_dirl, dp, grp, flags, ep, anoncrp, 2428 exflags); 2429 dp = dp2; 2430 } 2431 } 2432 } 2433 2434 /* 2435 * Traverse the binary tree either updating a node that is already there 2436 * for the new directory or adding the new node. 2437 */ 2438 static void 2439 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 2440 int flags, struct exportlist *ep, struct xucred *anoncrp, int exflags) 2441 { 2442 struct dirlist *dp; 2443 struct hostlist *hp; 2444 int cmp; 2445 2446 dp = *dpp; 2447 if (dp) { 2448 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 2449 if (cmp > 0) { 2450 add_dlist(&dp->dp_left, newdp, grp, flags, ep, anoncrp, 2451 exflags); 2452 return; 2453 } else if (cmp < 0) { 2454 add_dlist(&dp->dp_right, newdp, grp, flags, ep, anoncrp, 2455 exflags); 2456 return; 2457 } else 2458 free((caddr_t)newdp); 2459 } else { 2460 dp = newdp; 2461 dp->dp_left = (struct dirlist *)NULL; 2462 *dpp = dp; 2463 } 2464 if (grp) { 2465 2466 /* 2467 * Hang all of the host(s) off of the directory point. 2468 */ 2469 do { 2470 hp = get_ht(); 2471 hp->ht_grp = grp; 2472 hp->ht_next = dp->dp_hosts; 2473 dp->dp_hosts = hp; 2474 /* Save the security flavors list for this host set. */ 2475 grp->gr_numsecflavors = ep->ex_numsecflavors; 2476 if (ep->ex_numsecflavors > 0) 2477 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2478 sizeof(ep->ex_secflavors)); 2479 grp = grp->gr_next; 2480 } while (grp); 2481 } else { 2482 ep->ex_flag |= EX_DEFSET; 2483 dp->dp_flag |= DP_DEFSET; 2484 /* Save the default security flavors list. */ 2485 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2486 if (ep->ex_numsecflavors > 0) 2487 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2488 sizeof(ep->ex_secflavors)); 2489 ep->ex_defanon = *anoncrp; 2490 ep->ex_defexflags = exflags; 2491 } 2492 } 2493 2494 /* 2495 * Search for a dirpath on the export point. 2496 */ 2497 static struct dirlist * 2498 dirp_search(struct dirlist *dp, char *dirp) 2499 { 2500 int cmp; 2501 2502 if (dp) { 2503 cmp = strcmp(dp->dp_dirp, dirp); 2504 if (cmp > 0) 2505 return (dirp_search(dp->dp_left, dirp)); 2506 else if (cmp < 0) 2507 return (dirp_search(dp->dp_right, dirp)); 2508 else 2509 return (dp); 2510 } 2511 return (dp); 2512 } 2513 2514 /* 2515 * Scan for a host match in a directory tree. 2516 */ 2517 static int 2518 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 2519 int *hostsetp, int *numsecflavors, int **secflavorsp) 2520 { 2521 struct hostlist *hp; 2522 struct grouplist *grp; 2523 struct addrinfo *ai; 2524 2525 if (dp) { 2526 if (dp->dp_flag & DP_DEFSET) 2527 *defsetp = dp->dp_flag; 2528 hp = dp->dp_hosts; 2529 while (hp) { 2530 grp = hp->ht_grp; 2531 switch (grp->gr_type) { 2532 case GT_HOST: 2533 ai = grp->gr_ptr.gt_addrinfo; 2534 for (; ai; ai = ai->ai_next) { 2535 if (!sacmp(ai->ai_addr, saddr, NULL)) { 2536 *hostsetp = 2537 (hp->ht_flag | DP_HOSTSET); 2538 if (numsecflavors != NULL) { 2539 *numsecflavors = 2540 grp->gr_numsecflavors; 2541 *secflavorsp = 2542 grp->gr_secflavors; 2543 } 2544 return (1); 2545 } 2546 } 2547 break; 2548 case GT_NET: 2549 if (!sacmp(saddr, (struct sockaddr *) 2550 &grp->gr_ptr.gt_net.nt_net, 2551 (struct sockaddr *) 2552 &grp->gr_ptr.gt_net.nt_mask)) { 2553 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2554 if (numsecflavors != NULL) { 2555 *numsecflavors = 2556 grp->gr_numsecflavors; 2557 *secflavorsp = 2558 grp->gr_secflavors; 2559 } 2560 return (1); 2561 } 2562 break; 2563 } 2564 hp = hp->ht_next; 2565 } 2566 } 2567 return (0); 2568 } 2569 2570 /* 2571 * Scan tree for a host that matches the address. 2572 */ 2573 static int 2574 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2575 { 2576 int defset, hostset; 2577 2578 if (dp) { 2579 if (scan_tree(dp->dp_left, saddr)) 2580 return (1); 2581 if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL)) 2582 return (1); 2583 if (scan_tree(dp->dp_right, saddr)) 2584 return (1); 2585 } 2586 return (0); 2587 } 2588 2589 /* 2590 * Traverse the dirlist tree and free it up. 2591 */ 2592 static void 2593 free_dir(struct dirlist *dp) 2594 { 2595 2596 if (dp) { 2597 free_dir(dp->dp_left); 2598 free_dir(dp->dp_right); 2599 free_host(dp->dp_hosts); 2600 free(dp->dp_dirp); 2601 free(dp); 2602 } 2603 } 2604 2605 /* 2606 * Parse a colon separated list of security flavors 2607 */ 2608 static int 2609 parsesec(char *seclist, struct exportlist *ep) 2610 { 2611 char *cp, savedc; 2612 int flavor; 2613 2614 ep->ex_numsecflavors = 0; 2615 for (;;) { 2616 cp = strchr(seclist, ':'); 2617 if (cp) { 2618 savedc = *cp; 2619 *cp = '\0'; 2620 } 2621 2622 if (!strcmp(seclist, "sys")) 2623 flavor = AUTH_SYS; 2624 else if (!strcmp(seclist, "krb5")) 2625 flavor = RPCSEC_GSS_KRB5; 2626 else if (!strcmp(seclist, "krb5i")) 2627 flavor = RPCSEC_GSS_KRB5I; 2628 else if (!strcmp(seclist, "krb5p")) 2629 flavor = RPCSEC_GSS_KRB5P; 2630 else { 2631 if (cp) 2632 *cp = savedc; 2633 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2634 return (1); 2635 } 2636 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2637 if (cp) 2638 *cp = savedc; 2639 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2640 return (1); 2641 } 2642 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2643 ep->ex_numsecflavors++; 2644 if (cp) { 2645 *cp = savedc; 2646 seclist = cp + 1; 2647 } else { 2648 break; 2649 } 2650 } 2651 return (0); 2652 } 2653 2654 /* 2655 * Parse the option string and update fields. 2656 * Option arguments may either be -<option>=<value> or 2657 * -<option> <value> 2658 */ 2659 static int 2660 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2661 int *has_hostp, int *exflagsp, struct xucred *cr) 2662 { 2663 char *cpoptarg, *cpoptend; 2664 char *cp, *endcp, *cpopt, savedc, savedc2; 2665 int allflag, usedarg; 2666 2667 savedc2 = '\0'; 2668 cpopt = *cpp; 2669 cpopt++; 2670 cp = *endcpp; 2671 savedc = *cp; 2672 *cp = '\0'; 2673 while (cpopt && *cpopt) { 2674 allflag = 1; 2675 usedarg = -2; 2676 if ((cpoptend = strchr(cpopt, ','))) { 2677 *cpoptend++ = '\0'; 2678 if ((cpoptarg = strchr(cpopt, '='))) 2679 *cpoptarg++ = '\0'; 2680 } else { 2681 if ((cpoptarg = strchr(cpopt, '='))) 2682 *cpoptarg++ = '\0'; 2683 else { 2684 *cp = savedc; 2685 nextfield(&cp, &endcp); 2686 **endcpp = '\0'; 2687 if (endcp > cp && *cp != '-') { 2688 cpoptarg = cp; 2689 savedc2 = *endcp; 2690 *endcp = '\0'; 2691 usedarg = 0; 2692 } 2693 } 2694 } 2695 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2696 *exflagsp |= MNT_EXRDONLY; 2697 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2698 !(allflag = strcmp(cpopt, "mapall")) || 2699 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2700 usedarg++; 2701 parsecred(cpoptarg, cr); 2702 if (allflag == 0) { 2703 *exflagsp |= MNT_EXPORTANON; 2704 opt_flags |= OP_MAPALL; 2705 } else 2706 opt_flags |= OP_MAPROOT; 2707 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2708 !strcmp(cpopt, "m"))) { 2709 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2710 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2711 return (1); 2712 } 2713 usedarg++; 2714 opt_flags |= OP_MASK; 2715 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2716 !strcmp(cpopt, "n"))) { 2717 if (strchr(cpoptarg, '/') != NULL) { 2718 if (debug) 2719 fprintf(stderr, "setting OP_MASKLEN\n"); 2720 opt_flags |= OP_MASKLEN; 2721 } 2722 if (grp->gr_type != GT_NULL) { 2723 syslog(LOG_ERR, "network/host conflict"); 2724 return (1); 2725 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2726 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2727 return (1); 2728 } 2729 grp->gr_type = GT_NET; 2730 *has_hostp = 1; 2731 usedarg++; 2732 opt_flags |= OP_NET; 2733 } else if (!strcmp(cpopt, "alldirs")) { 2734 opt_flags |= OP_ALLDIRS; 2735 } else if (!strcmp(cpopt, "public")) { 2736 *exflagsp |= MNT_EXPUBLIC; 2737 } else if (!strcmp(cpopt, "webnfs")) { 2738 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2739 opt_flags |= OP_MAPALL; 2740 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2741 ep->ex_indexfile = strdup(cpoptarg); 2742 } else if (!strcmp(cpopt, "quiet")) { 2743 opt_flags |= OP_QUIET; 2744 } else if (cpoptarg && !strcmp(cpopt, "sec")) { 2745 if (parsesec(cpoptarg, ep)) 2746 return (1); 2747 opt_flags |= OP_SEC; 2748 usedarg++; 2749 } else { 2750 syslog(LOG_ERR, "bad opt %s", cpopt); 2751 return (1); 2752 } 2753 if (usedarg >= 0) { 2754 *endcp = savedc2; 2755 **endcpp = savedc; 2756 if (usedarg > 0) { 2757 *cpp = cp; 2758 *endcpp = endcp; 2759 } 2760 return (0); 2761 } 2762 cpopt = cpoptend; 2763 } 2764 **endcpp = savedc; 2765 return (0); 2766 } 2767 2768 /* 2769 * Translate a character string to the corresponding list of network 2770 * addresses for a hostname. 2771 */ 2772 static int 2773 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 2774 { 2775 struct grouplist *checkgrp; 2776 struct addrinfo *ai, *tai, hints; 2777 int ecode; 2778 char host[NI_MAXHOST]; 2779 2780 if (grp->gr_type != GT_NULL) { 2781 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2782 return (1); 2783 } 2784 memset(&hints, 0, sizeof hints); 2785 hints.ai_flags = AI_CANONNAME; 2786 hints.ai_protocol = IPPROTO_UDP; 2787 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2788 if (ecode != 0) { 2789 syslog(LOG_ERR,"can't get address info for host %s", cp); 2790 return 1; 2791 } 2792 grp->gr_ptr.gt_addrinfo = ai; 2793 while (ai != NULL) { 2794 if (ai->ai_canonname == NULL) { 2795 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2796 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2797 strlcpy(host, "?", sizeof(host)); 2798 ai->ai_canonname = strdup(host); 2799 ai->ai_flags |= AI_CANONNAME; 2800 } 2801 if (debug) 2802 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2803 /* 2804 * Sanity check: make sure we don't already have an entry 2805 * for this host in the grouplist. 2806 */ 2807 for (checkgrp = tgrp; checkgrp != NULL; 2808 checkgrp = checkgrp->gr_next) { 2809 if (checkgrp->gr_type != GT_HOST) 2810 continue; 2811 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2812 tai = tai->ai_next) { 2813 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2814 continue; 2815 if (debug) 2816 fprintf(stderr, 2817 "ignoring duplicate host %s\n", 2818 ai->ai_canonname); 2819 grp->gr_type = GT_IGNORE; 2820 return (0); 2821 } 2822 } 2823 ai = ai->ai_next; 2824 } 2825 grp->gr_type = GT_HOST; 2826 return (0); 2827 } 2828 2829 /* 2830 * Free up an exports list component 2831 */ 2832 static void 2833 free_exp(struct exportlist *ep) 2834 { 2835 struct grouplist *grp, *tgrp; 2836 2837 if (ep->ex_defdir) { 2838 free_host(ep->ex_defdir->dp_hosts); 2839 free((caddr_t)ep->ex_defdir); 2840 } 2841 if (ep->ex_fsdir) 2842 free(ep->ex_fsdir); 2843 if (ep->ex_indexfile) 2844 free(ep->ex_indexfile); 2845 free_dir(ep->ex_dirl); 2846 grp = ep->ex_grphead; 2847 while (grp) { 2848 tgrp = grp; 2849 grp = grp->gr_next; 2850 free_grp(tgrp); 2851 } 2852 free((caddr_t)ep); 2853 } 2854 2855 /* 2856 * Free up the v4root exports. 2857 */ 2858 static void 2859 free_v4rootexp(void) 2860 { 2861 2862 if (v4root_ep != NULL) { 2863 free_exp(v4root_ep); 2864 v4root_ep = NULL; 2865 } 2866 } 2867 2868 /* 2869 * Free hosts. 2870 */ 2871 static void 2872 free_host(struct hostlist *hp) 2873 { 2874 struct hostlist *hp2; 2875 2876 while (hp) { 2877 hp2 = hp; 2878 hp = hp->ht_next; 2879 free((caddr_t)hp2); 2880 } 2881 } 2882 2883 static struct hostlist * 2884 get_ht(void) 2885 { 2886 struct hostlist *hp; 2887 2888 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2889 if (hp == (struct hostlist *)NULL) 2890 out_of_mem(); 2891 hp->ht_next = (struct hostlist *)NULL; 2892 hp->ht_flag = 0; 2893 return (hp); 2894 } 2895 2896 /* 2897 * Out of memory, fatal 2898 */ 2899 static void 2900 out_of_mem(void) 2901 { 2902 2903 syslog(LOG_ERR, "out of memory"); 2904 exit(2); 2905 } 2906 2907 /* 2908 * Call do_mount() from the struct exportlist, for each case needed. 2909 */ 2910 static int 2911 do_export_mount(struct exportlist *ep, struct statfs *fsp) 2912 { 2913 struct grouplist *grp, defgrp; 2914 int ret; 2915 size_t dirlen; 2916 2917 LOGDEBUG("do_export_mount=%s", ep->ex_fsdir); 2918 dirlen = strlen(ep->ex_fsdir); 2919 if ((ep->ex_flag & EX_DEFSET) != 0) { 2920 defgrp.gr_type = GT_DEFAULT; 2921 defgrp.gr_next = NULL; 2922 /* We have an entry for all other hosts/nets. */ 2923 LOGDEBUG("ex_defexflags=0x%x", ep->ex_defexflags); 2924 ret = do_mount(ep, &defgrp, ep->ex_defexflags, &ep->ex_defanon, 2925 ep->ex_fsdir, dirlen, fsp, ep->ex_defnumsecflavors, 2926 ep->ex_defsecflavors); 2927 if (ret != 0) 2928 return (ret); 2929 } 2930 2931 /* Do a mount for each group. */ 2932 grp = ep->ex_grphead; 2933 while (grp != NULL) { 2934 LOGDEBUG("do mount gr_type=0x%x gr_exflags=0x%x", 2935 grp->gr_type, grp->gr_exflags); 2936 ret = do_mount(ep, grp, grp->gr_exflags, &grp->gr_anon, 2937 ep->ex_fsdir, dirlen, fsp, grp->gr_numsecflavors, 2938 grp->gr_secflavors); 2939 if (ret != 0) 2940 return (ret); 2941 grp = grp->gr_next; 2942 } 2943 return (0); 2944 } 2945 2946 /* 2947 * Do the nmount() syscall with the update flag to push the export info into 2948 * the kernel. 2949 */ 2950 static int 2951 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2952 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb, 2953 int numsecflavors, int *secflavors) 2954 { 2955 struct statfs fsb1; 2956 struct addrinfo *ai; 2957 struct export_args *eap; 2958 char errmsg[255]; 2959 char *cp; 2960 int done; 2961 char savedc; 2962 struct iovec *iov; 2963 int i, iovlen; 2964 int ret; 2965 struct nfsex_args nfsea; 2966 2967 eap = &nfsea.export; 2968 2969 cp = NULL; 2970 savedc = '\0'; 2971 iov = NULL; 2972 iovlen = 0; 2973 ret = 0; 2974 2975 bzero(eap, sizeof (struct export_args)); 2976 bzero(errmsg, sizeof(errmsg)); 2977 eap->ex_flags = exflags; 2978 eap->ex_anon = *anoncrp; 2979 LOGDEBUG("do_mount exflags=0x%x", exflags); 2980 eap->ex_indexfile = ep->ex_indexfile; 2981 if (grp->gr_type == GT_HOST) 2982 ai = grp->gr_ptr.gt_addrinfo; 2983 else 2984 ai = NULL; 2985 eap->ex_numsecflavors = numsecflavors; 2986 LOGDEBUG("do_mount numsec=%d", numsecflavors); 2987 for (i = 0; i < eap->ex_numsecflavors; i++) 2988 eap->ex_secflavors[i] = secflavors[i]; 2989 if (eap->ex_numsecflavors == 0) { 2990 eap->ex_numsecflavors = 1; 2991 eap->ex_secflavors[0] = AUTH_SYS; 2992 } 2993 done = FALSE; 2994 2995 if (v4root_phase == 0) { 2996 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2997 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2998 build_iovec(&iov, &iovlen, "from", NULL, 0); 2999 build_iovec(&iov, &iovlen, "update", NULL, 0); 3000 build_iovec(&iov, &iovlen, "export", eap, 3001 sizeof (struct export_args)); 3002 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 3003 } 3004 3005 while (!done) { 3006 switch (grp->gr_type) { 3007 case GT_HOST: 3008 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 3009 goto skip; 3010 eap->ex_addr = ai->ai_addr; 3011 eap->ex_addrlen = ai->ai_addrlen; 3012 eap->ex_masklen = 0; 3013 break; 3014 case GT_NET: 3015 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 3016 have_v6 == 0) 3017 goto skip; 3018 eap->ex_addr = 3019 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 3020 eap->ex_addrlen = 3021 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 3022 eap->ex_mask = 3023 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 3024 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 3025 break; 3026 case GT_DEFAULT: 3027 eap->ex_addr = NULL; 3028 eap->ex_addrlen = 0; 3029 eap->ex_mask = NULL; 3030 eap->ex_masklen = 0; 3031 break; 3032 case GT_IGNORE: 3033 ret = 0; 3034 goto error_exit; 3035 break; 3036 default: 3037 syslog(LOG_ERR, "bad grouptype"); 3038 if (cp) 3039 *cp = savedc; 3040 ret = 1; 3041 goto error_exit; 3042 } 3043 3044 /* 3045 * For V4:, use the nfssvc() syscall, instead of mount(). 3046 */ 3047 if (v4root_phase == 2) { 3048 nfsea.fspec = v4root_dirpath; 3049 if (nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 3050 syslog(LOG_ERR, "Exporting V4: failed"); 3051 return (2); 3052 } 3053 } else { 3054 /* 3055 * XXX: 3056 * Maybe I should just use the fsb->f_mntonname path 3057 * instead of looping back up the dirp to the mount 3058 * point?? 3059 * Also, needs to know how to export all types of local 3060 * exportable filesystems and not just "ufs". 3061 */ 3062 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 3063 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 3064 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 3065 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 3066 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 3067 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 3068 errmsg[0] = '\0'; 3069 3070 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 3071 if (cp) 3072 *cp-- = savedc; 3073 else 3074 cp = dirp + dirplen - 1; 3075 if (opt_flags & OP_QUIET) { 3076 ret = 1; 3077 goto error_exit; 3078 } 3079 if (errno == EPERM) { 3080 if (debug) 3081 warnx("can't change attributes for %s: %s", 3082 dirp, errmsg); 3083 syslog(LOG_ERR, 3084 "can't change attributes for %s: %s", 3085 dirp, errmsg); 3086 ret = 1; 3087 goto error_exit; 3088 } 3089 if (opt_flags & OP_ALLDIRS) { 3090 if (errno == EINVAL) 3091 syslog(LOG_ERR, 3092 "-alldirs requested but %s is not a filesystem mountpoint", 3093 dirp); 3094 else 3095 syslog(LOG_ERR, 3096 "could not remount %s: %m", 3097 dirp); 3098 ret = 1; 3099 goto error_exit; 3100 } 3101 /* back up over the last component */ 3102 while (*cp == '/' && cp > dirp) 3103 cp--; 3104 while (*(cp - 1) != '/' && cp > dirp) 3105 cp--; 3106 if (cp == dirp) { 3107 if (debug) 3108 warnx("mnt unsucc"); 3109 syslog(LOG_ERR, "can't export %s %s", 3110 dirp, errmsg); 3111 ret = 1; 3112 goto error_exit; 3113 } 3114 savedc = *cp; 3115 *cp = '\0'; 3116 /* 3117 * Check that we're still on the same 3118 * filesystem. 3119 */ 3120 if (statfs(dirp, &fsb1) != 0 || 3121 fsidcmp(&fsb1.f_fsid, &fsb->f_fsid) != 0) { 3122 *cp = savedc; 3123 syslog(LOG_ERR, 3124 "can't export %s %s", dirp, 3125 errmsg); 3126 ret = 1; 3127 goto error_exit; 3128 } 3129 } 3130 } 3131 3132 /* 3133 * For the experimental server: 3134 * If this is the public directory, get the file handle 3135 * and load it into the kernel via the nfssvc() syscall. 3136 */ 3137 if ((exflags & MNT_EXPUBLIC) != 0) { 3138 fhandle_t fh; 3139 char *public_name; 3140 3141 if (eap->ex_indexfile != NULL) 3142 public_name = eap->ex_indexfile; 3143 else 3144 public_name = dirp; 3145 if (getfh(public_name, &fh) < 0) 3146 syslog(LOG_ERR, 3147 "Can't get public fh for %s", public_name); 3148 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 3149 syslog(LOG_ERR, 3150 "Can't set public fh for %s", public_name); 3151 else { 3152 has_publicfh = 1; 3153 has_set_publicfh = 1; 3154 ep->ex_flag |= EX_PUBLICFH; 3155 } 3156 } 3157 skip: 3158 if (ai != NULL) 3159 ai = ai->ai_next; 3160 if (ai == NULL) 3161 done = TRUE; 3162 } 3163 if (cp) 3164 *cp = savedc; 3165 error_exit: 3166 /* free strings allocated by strdup() in getmntopts.c */ 3167 if (iov != NULL) { 3168 free(iov[0].iov_base); /* fstype */ 3169 free(iov[2].iov_base); /* fspath */ 3170 free(iov[4].iov_base); /* from */ 3171 free(iov[6].iov_base); /* update */ 3172 free(iov[8].iov_base); /* export */ 3173 free(iov[10].iov_base); /* errmsg */ 3174 3175 /* free iov, allocated by realloc() */ 3176 free(iov); 3177 } 3178 return (ret); 3179 } 3180 3181 /* 3182 * Translate a net address. 3183 * 3184 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 3185 */ 3186 static int 3187 get_net(char *cp, struct netmsk *net, int maskflg) 3188 { 3189 struct netent *np = NULL; 3190 char *name, *p, *prefp; 3191 struct sockaddr_in sin; 3192 struct sockaddr *sa = NULL; 3193 struct addrinfo hints, *ai = NULL; 3194 char netname[NI_MAXHOST]; 3195 long preflen; 3196 3197 p = prefp = NULL; 3198 if ((opt_flags & OP_MASKLEN) && !maskflg) { 3199 p = strchr(cp, '/'); 3200 *p = '\0'; 3201 prefp = p + 1; 3202 } 3203 3204 /* 3205 * Check for a numeric address first. We wish to avoid 3206 * possible DNS lookups in getnetbyname(). 3207 */ 3208 if (isxdigit(*cp) || *cp == ':') { 3209 memset(&hints, 0, sizeof hints); 3210 /* Ensure the mask and the network have the same family. */ 3211 if (maskflg && (opt_flags & OP_NET)) 3212 hints.ai_family = net->nt_net.ss_family; 3213 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 3214 hints.ai_family = net->nt_mask.ss_family; 3215 else 3216 hints.ai_family = AF_UNSPEC; 3217 hints.ai_flags = AI_NUMERICHOST; 3218 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 3219 sa = ai->ai_addr; 3220 if (sa != NULL && ai->ai_family == AF_INET) { 3221 /* 3222 * The address in `cp' is really a network address, so 3223 * use inet_network() to re-interpret this correctly. 3224 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 3225 */ 3226 bzero(&sin, sizeof sin); 3227 sin.sin_family = AF_INET; 3228 sin.sin_len = sizeof sin; 3229 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 3230 if (debug) 3231 fprintf(stderr, "get_net: v4 addr %s\n", 3232 inet_ntoa(sin.sin_addr)); 3233 sa = (struct sockaddr *)&sin; 3234 } 3235 } 3236 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 3237 bzero(&sin, sizeof sin); 3238 sin.sin_family = AF_INET; 3239 sin.sin_len = sizeof sin; 3240 sin.sin_addr = inet_makeaddr(np->n_net, 0); 3241 sa = (struct sockaddr *)&sin; 3242 } 3243 if (sa == NULL) 3244 goto fail; 3245 3246 if (maskflg) { 3247 /* The specified sockaddr is a mask. */ 3248 if (checkmask(sa) != 0) 3249 goto fail; 3250 bcopy(sa, &net->nt_mask, sa->sa_len); 3251 opt_flags |= OP_HAVEMASK; 3252 } else { 3253 /* The specified sockaddr is a network address. */ 3254 bcopy(sa, &net->nt_net, sa->sa_len); 3255 3256 /* Get a network name for the export list. */ 3257 if (np) { 3258 name = np->n_name; 3259 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 3260 NULL, 0, NI_NUMERICHOST) == 0) { 3261 name = netname; 3262 } else { 3263 goto fail; 3264 } 3265 if ((net->nt_name = strdup(name)) == NULL) 3266 out_of_mem(); 3267 3268 /* 3269 * Extract a mask from either a "/<masklen>" suffix, or 3270 * from the class of an IPv4 address. 3271 */ 3272 if (opt_flags & OP_MASKLEN) { 3273 preflen = strtol(prefp, NULL, 10); 3274 if (preflen < 0L || preflen == LONG_MAX) 3275 goto fail; 3276 bcopy(sa, &net->nt_mask, sa->sa_len); 3277 if (makemask(&net->nt_mask, (int)preflen) != 0) 3278 goto fail; 3279 opt_flags |= OP_HAVEMASK; 3280 *p = '/'; 3281 } else if (sa->sa_family == AF_INET && 3282 (opt_flags & OP_MASK) == 0) { 3283 in_addr_t addr; 3284 3285 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 3286 if (IN_CLASSA(addr)) 3287 preflen = 8; 3288 else if (IN_CLASSB(addr)) 3289 preflen = 16; 3290 else if (IN_CLASSC(addr)) 3291 preflen = 24; 3292 else if (IN_CLASSD(addr)) 3293 preflen = 28; 3294 else 3295 preflen = 32; /* XXX */ 3296 3297 bcopy(sa, &net->nt_mask, sa->sa_len); 3298 makemask(&net->nt_mask, (int)preflen); 3299 opt_flags |= OP_HAVEMASK; 3300 } 3301 } 3302 3303 if (ai) 3304 freeaddrinfo(ai); 3305 return 0; 3306 3307 fail: 3308 if (ai) 3309 freeaddrinfo(ai); 3310 return 1; 3311 } 3312 3313 /* 3314 * Parse out the next white space separated field 3315 */ 3316 static void 3317 nextfield(char **cp, char **endcp) 3318 { 3319 char *p; 3320 char quot = 0; 3321 3322 p = *cp; 3323 while (*p == ' ' || *p == '\t') 3324 p++; 3325 *cp = p; 3326 while (*p != '\0') { 3327 if (quot) { 3328 if (*p == quot) 3329 quot = 0; 3330 } else { 3331 if (*p == '\\' && *(p + 1) != '\0') 3332 p++; 3333 else if (*p == '\'' || *p == '"') 3334 quot = *p; 3335 else if (*p == ' ' || *p == '\t') 3336 break; 3337 } 3338 p++; 3339 }; 3340 *endcp = p; 3341 } 3342 3343 /* 3344 * Get an exports file line. Skip over blank lines and handle line 3345 * continuations. 3346 */ 3347 static int 3348 get_line(void) 3349 { 3350 char *p, *cp; 3351 size_t len; 3352 int totlen, cont_line; 3353 3354 /* 3355 * Loop around ignoring blank lines and getting all continuation lines. 3356 */ 3357 p = line; 3358 totlen = 0; 3359 do { 3360 if ((p = fgetln(exp_file, &len)) == NULL) 3361 return (0); 3362 cp = p + len - 1; 3363 cont_line = 0; 3364 while (cp >= p && 3365 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 3366 if (*cp == '\\') 3367 cont_line = 1; 3368 cp--; 3369 len--; 3370 } 3371 if (cont_line) { 3372 *++cp = ' '; 3373 len++; 3374 } 3375 if (linesize < len + totlen + 1) { 3376 linesize = len + totlen + 1; 3377 line = realloc(line, linesize); 3378 if (line == NULL) 3379 out_of_mem(); 3380 } 3381 memcpy(line + totlen, p, len); 3382 totlen += len; 3383 line[totlen] = '\0'; 3384 } while (totlen == 0 || cont_line); 3385 return (1); 3386 } 3387 3388 /* 3389 * Parse a description of a credential. 3390 */ 3391 static void 3392 parsecred(char *namelist, struct xucred *cr) 3393 { 3394 char *name; 3395 int cnt; 3396 char *names; 3397 struct passwd *pw; 3398 struct group *gr; 3399 gid_t groups[XU_NGROUPS + 1]; 3400 int ngroups; 3401 3402 cr->cr_version = XUCRED_VERSION; 3403 /* 3404 * Set up the unprivileged user. 3405 */ 3406 cr->cr_uid = 65534; 3407 cr->cr_groups[0] = 65533; 3408 cr->cr_ngroups = 1; 3409 /* 3410 * Get the user's password table entry. 3411 */ 3412 names = namelist; 3413 name = strsep_quote(&names, ":"); 3414 /* Bug? name could be NULL here */ 3415 if (isdigit(*name) || *name == '-') 3416 pw = getpwuid(atoi(name)); 3417 else 3418 pw = getpwnam(name); 3419 /* 3420 * Credentials specified as those of a user. 3421 */ 3422 if (names == NULL) { 3423 if (pw == NULL) { 3424 syslog(LOG_ERR, "unknown user: %s", name); 3425 return; 3426 } 3427 cr->cr_uid = pw->pw_uid; 3428 ngroups = XU_NGROUPS + 1; 3429 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) { 3430 syslog(LOG_ERR, "too many groups"); 3431 ngroups = XU_NGROUPS + 1; 3432 } 3433 3434 /* 3435 * Compress out duplicate. 3436 */ 3437 cr->cr_ngroups = ngroups - 1; 3438 cr->cr_groups[0] = groups[0]; 3439 for (cnt = 2; cnt < ngroups; cnt++) 3440 cr->cr_groups[cnt - 1] = groups[cnt]; 3441 return; 3442 } 3443 /* 3444 * Explicit credential specified as a colon separated list: 3445 * uid:gid:gid:... 3446 */ 3447 if (pw != NULL) 3448 cr->cr_uid = pw->pw_uid; 3449 else if (isdigit(*name) || *name == '-') 3450 cr->cr_uid = atoi(name); 3451 else { 3452 syslog(LOG_ERR, "unknown user: %s", name); 3453 return; 3454 } 3455 cr->cr_ngroups = 0; 3456 while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) { 3457 name = strsep_quote(&names, ":"); 3458 if (isdigit(*name) || *name == '-') { 3459 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 3460 } else { 3461 if ((gr = getgrnam(name)) == NULL) { 3462 syslog(LOG_ERR, "unknown group: %s", name); 3463 continue; 3464 } 3465 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 3466 } 3467 } 3468 if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS) 3469 syslog(LOG_ERR, "too many groups"); 3470 } 3471 3472 #define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 3473 /* 3474 * Routines that maintain the remote mounttab 3475 */ 3476 static void 3477 get_mountlist(void) 3478 { 3479 struct mountlist *mlp; 3480 char *host, *dirp, *cp; 3481 char str[STRSIZ]; 3482 FILE *mlfile; 3483 3484 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 3485 if (errno == ENOENT) 3486 return; 3487 else { 3488 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 3489 return; 3490 } 3491 } 3492 while (fgets(str, STRSIZ, mlfile) != NULL) { 3493 cp = str; 3494 host = strsep(&cp, " \t\n"); 3495 dirp = strsep(&cp, " \t\n"); 3496 if (host == NULL || dirp == NULL) 3497 continue; 3498 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3499 if (mlp == (struct mountlist *)NULL) 3500 out_of_mem(); 3501 strncpy(mlp->ml_host, host, MNTNAMLEN); 3502 mlp->ml_host[MNTNAMLEN] = '\0'; 3503 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3504 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3505 3506 SLIST_INSERT_HEAD(&mlhead, mlp, next); 3507 } 3508 fclose(mlfile); 3509 } 3510 3511 static void 3512 del_mlist(char *hostp, char *dirp) 3513 { 3514 struct mountlist *mlp, *mlp2; 3515 FILE *mlfile; 3516 int fnd = 0; 3517 3518 SLIST_FOREACH_SAFE(mlp, &mlhead, next, mlp2) { 3519 if (!strcmp(mlp->ml_host, hostp) && 3520 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 3521 fnd = 1; 3522 SLIST_REMOVE(&mlhead, mlp, mountlist, next); 3523 free((caddr_t)mlp); 3524 } 3525 } 3526 if (fnd) { 3527 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 3528 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 3529 return; 3530 } 3531 SLIST_FOREACH(mlp, &mlhead, next) { 3532 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3533 } 3534 fclose(mlfile); 3535 } 3536 } 3537 3538 static void 3539 add_mlist(char *hostp, char *dirp) 3540 { 3541 struct mountlist *mlp; 3542 FILE *mlfile; 3543 3544 SLIST_FOREACH(mlp, &mlhead, next) { 3545 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 3546 return; 3547 } 3548 3549 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3550 if (mlp == (struct mountlist *)NULL) 3551 out_of_mem(); 3552 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 3553 mlp->ml_host[MNTNAMLEN] = '\0'; 3554 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3555 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3556 SLIST_INSERT_HEAD(&mlhead, mlp, next); 3557 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 3558 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 3559 return; 3560 } 3561 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3562 fclose(mlfile); 3563 } 3564 3565 /* 3566 * Free up a group list. 3567 */ 3568 static void 3569 free_grp(struct grouplist *grp) 3570 { 3571 if (grp->gr_type == GT_HOST) { 3572 if (grp->gr_ptr.gt_addrinfo != NULL) 3573 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 3574 } else if (grp->gr_type == GT_NET) { 3575 if (grp->gr_ptr.gt_net.nt_name) 3576 free(grp->gr_ptr.gt_net.nt_name); 3577 } 3578 free((caddr_t)grp); 3579 } 3580 3581 #ifdef DEBUG 3582 static void 3583 SYSLOG(int pri, const char *fmt, ...) 3584 { 3585 va_list ap; 3586 3587 va_start(ap, fmt); 3588 vfprintf(stderr, fmt, ap); 3589 va_end(ap); 3590 } 3591 #endif /* DEBUG */ 3592 3593 /* 3594 * Check options for consistency. 3595 */ 3596 static int 3597 check_options(struct dirlist *dp) 3598 { 3599 3600 if (v4root_phase == 0 && dp == NULL) 3601 return (1); 3602 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 3603 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 3604 return (1); 3605 } 3606 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 3607 syslog(LOG_ERR, "-mask requires -network"); 3608 return (1); 3609 } 3610 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 3611 syslog(LOG_ERR, "-network requires mask specification"); 3612 return (1); 3613 } 3614 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3615 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3616 return (1); 3617 } 3618 if (v4root_phase > 0 && 3619 (opt_flags & 3620 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3621 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3622 return (1); 3623 } 3624 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3625 syslog(LOG_ERR, "-alldirs has multiple directories"); 3626 return (1); 3627 } 3628 return (0); 3629 } 3630 3631 /* 3632 * Check an absolute directory path for any symbolic links. Return true 3633 */ 3634 static int 3635 check_dirpath(char *dirp) 3636 { 3637 char *cp; 3638 int ret = 1; 3639 struct stat sb; 3640 3641 cp = dirp + 1; 3642 while (*cp && ret) { 3643 if (*cp == '/') { 3644 *cp = '\0'; 3645 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3646 ret = 0; 3647 *cp = '/'; 3648 } 3649 cp++; 3650 } 3651 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3652 ret = 0; 3653 return (ret); 3654 } 3655 3656 /* 3657 * Make a netmask according to the specified prefix length. The ss_family 3658 * and other non-address fields must be initialised before calling this. 3659 */ 3660 static int 3661 makemask(struct sockaddr_storage *ssp, int bitlen) 3662 { 3663 u_char *p; 3664 int bits, i, len; 3665 3666 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3667 return (-1); 3668 if (bitlen > len * CHAR_BIT) 3669 return (-1); 3670 3671 for (i = 0; i < len; i++) { 3672 bits = MIN(CHAR_BIT, bitlen); 3673 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3674 bitlen -= bits; 3675 } 3676 return 0; 3677 } 3678 3679 /* 3680 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 3681 * is acceptable (i.e. of the form 1...10....0). 3682 */ 3683 static int 3684 checkmask(struct sockaddr *sa) 3685 { 3686 u_char *mask; 3687 int i, len; 3688 3689 if ((mask = sa_rawaddr(sa, &len)) == NULL) 3690 return (-1); 3691 3692 for (i = 0; i < len; i++) 3693 if (mask[i] != 0xff) 3694 break; 3695 if (i < len) { 3696 if (~mask[i] & (u_char)(~mask[i] + 1)) 3697 return (-1); 3698 i++; 3699 } 3700 for (; i < len; i++) 3701 if (mask[i] != 0) 3702 return (-1); 3703 return (0); 3704 } 3705 3706 /* 3707 * Compare two sockaddrs according to a specified mask. Return zero if 3708 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 3709 * If samask is NULL, perform a full comparison. 3710 */ 3711 static int 3712 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 3713 { 3714 unsigned char *p1, *p2, *mask; 3715 int len, i; 3716 3717 if (sa1->sa_family != sa2->sa_family || 3718 (p1 = sa_rawaddr(sa1, &len)) == NULL || 3719 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 3720 return (1); 3721 3722 switch (sa1->sa_family) { 3723 case AF_INET6: 3724 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 3725 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 3726 return (1); 3727 break; 3728 } 3729 3730 /* Simple binary comparison if no mask specified. */ 3731 if (samask == NULL) 3732 return (memcmp(p1, p2, len)); 3733 3734 /* Set up the mask, and do a mask-based comparison. */ 3735 if (sa1->sa_family != samask->sa_family || 3736 (mask = sa_rawaddr(samask, NULL)) == NULL) 3737 return (1); 3738 3739 for (i = 0; i < len; i++) 3740 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3741 return (1); 3742 return (0); 3743 } 3744 3745 /* 3746 * Return a pointer to the part of the sockaddr that contains the 3747 * raw address, and set *nbytes to its length in bytes. Returns 3748 * NULL if the address family is unknown. 3749 */ 3750 static void * 3751 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3752 void *p; 3753 int len; 3754 3755 switch (sa->sa_family) { 3756 case AF_INET: 3757 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3758 p = &((struct sockaddr_in *)sa)->sin_addr; 3759 break; 3760 case AF_INET6: 3761 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3762 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3763 break; 3764 default: 3765 p = NULL; 3766 len = 0; 3767 } 3768 3769 if (nbytes != NULL) 3770 *nbytes = len; 3771 return (p); 3772 } 3773 3774 static void 3775 huphandler(int sig __unused) 3776 { 3777 3778 got_sighup = 1; 3779 } 3780 3781 static void 3782 terminate(int sig __unused) 3783 { 3784 pidfile_remove(pfh); 3785 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 3786 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 3787 exit (0); 3788 } 3789