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 #include <sys/param.h> 36 #include <sys/conf.h> 37 #include <sys/fcntl.h> 38 #include <sys/fnv_hash.h> 39 #include <sys/linker.h> 40 #include <sys/module.h> 41 #include <sys/mount.h> 42 #include <sys/queue.h> 43 #include <sys/stat.h> 44 #include <sys/sysctl.h> 45 #include <sys/syslog.h> 46 47 #include <rpc/rpc.h> 48 #include <rpc/rpc_com.h> 49 #include <rpc/pmap_clnt.h> 50 #include <rpc/pmap_prot.h> 51 #include <rpcsvc/mount.h> 52 #include <nfs/nfsproto.h> 53 #include <nfs/nfssvc.h> 54 #include <nfsserver/nfs.h> 55 56 #include <fs/nfs/nfsport.h> 57 58 #include <arpa/inet.h> 59 60 #include <assert.h> 61 #include <ctype.h> 62 #include <err.h> 63 #include <errno.h> 64 #include <grp.h> 65 #include <libutil.h> 66 #include <limits.h> 67 #include <mntopts.h> 68 #include <netdb.h> 69 #include <pwd.h> 70 #include <signal.h> 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <unistd.h> 75 #include <vis.h> 76 #include "pathnames.h" 77 78 #ifdef DEBUG 79 #include <stdarg.h> 80 #endif 81 82 /* 83 * Structures for keeping the mount list and export list 84 */ 85 struct mountlist { 86 char ml_host[MNTNAMLEN+1]; 87 char ml_dirp[MNTPATHLEN+1]; 88 89 SLIST_ENTRY(mountlist) next; 90 }; 91 92 struct dirlist { 93 struct dirlist *dp_left; 94 struct dirlist *dp_right; 95 int dp_flag; 96 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 97 char *dp_dirp; 98 }; 99 /* dp_flag bits */ 100 #define DP_DEFSET 0x1 101 #define DP_HOSTSET 0x2 102 103 /* 104 * maproot/mapall credentials. 105 * cr_smallgrps can be used for a group list up to SMALLNGROUPS in size. 106 * Larger group lists are malloc'd/free'd. 107 */ 108 #define SMALLNGROUPS 32 109 struct expcred { 110 uid_t cr_uid; 111 int cr_ngroups; 112 gid_t cr_smallgrps[SMALLNGROUPS]; 113 gid_t *cr_groups; 114 }; 115 116 struct exportlist { 117 struct dirlist *ex_dirl; 118 struct dirlist *ex_defdir; 119 struct grouplist *ex_grphead; 120 int ex_flag; 121 fsid_t ex_fs; 122 char *ex_fsdir; 123 char *ex_indexfile; 124 struct expcred ex_defanon; 125 uint64_t ex_defexflags; 126 int ex_numsecflavors; 127 int ex_secflavors[MAXSECFLAVORS]; 128 int ex_defnumsecflavors; 129 int ex_defsecflavors[MAXSECFLAVORS]; 130 131 SLIST_ENTRY(exportlist) entries; 132 }; 133 /* ex_flag bits */ 134 #define EX_LINKED 0x01 135 #define EX_DONE 0x02 136 #define EX_DEFSET 0x04 137 #define EX_PUBLICFH 0x08 138 #define EX_ADMINWARN 0x10 139 140 SLIST_HEAD(exportlisthead, exportlist); 141 142 struct netmsk { 143 struct sockaddr_storage nt_net; 144 struct sockaddr_storage nt_mask; 145 char *nt_name; 146 }; 147 148 union grouptypes { 149 struct addrinfo *gt_addrinfo; 150 struct netmsk gt_net; 151 }; 152 153 struct grouplist { 154 int gr_type; 155 union grouptypes gr_ptr; 156 struct grouplist *gr_next; 157 struct expcred gr_anon; 158 uint64_t gr_exflags; 159 int gr_flag; 160 int gr_numsecflavors; 161 int gr_secflavors[MAXSECFLAVORS]; 162 }; 163 /* Group types */ 164 #define GT_NULL 0x0 165 #define GT_HOST 0x1 166 #define GT_NET 0x2 167 #define GT_DEFAULT 0x3 168 #define GT_IGNORE 0x5 169 170 /* Group flags */ 171 #define GR_FND 0x1 172 173 struct hostlist { 174 int ht_flag; /* Uses DP_xx bits */ 175 struct grouplist *ht_grp; 176 struct hostlist *ht_next; 177 }; 178 179 struct fhreturn { 180 int fhr_flag; 181 int fhr_vers; 182 nfsfh_t fhr_fh; 183 int fhr_numsecflavors; 184 int *fhr_secflavors; 185 }; 186 187 #define GETPORT_MAXTRY 20 /* Max tries to get a port # */ 188 189 /* 190 * How long to delay a reload of exports when there are RPC request(s) 191 * to process, in usec. Must be less than 1second. 192 */ 193 #define RELOADDELAY 250000 194 195 /* Global defs */ 196 static char *add_expdir(struct dirlist **, char *, int); 197 static void add_dlist(struct dirlist **, struct dirlist *, 198 struct grouplist *, int, struct exportlist *, 199 struct expcred *, uint64_t); 200 static void add_mlist(char *, char *); 201 static int check_path_component(const char *, char **); 202 static int check_dirpath(char *, char **); 203 static int check_statfs(const char *, struct statfs *, char **); 204 static int check_options(struct dirlist *); 205 static int checkmask(struct sockaddr *sa); 206 static int chk_host(struct dirlist *, struct sockaddr *, int *, int *, 207 int *, int **); 208 static char *strsep_quote(char **stringp, const char *delim); 209 static int create_service(struct netconfig *nconf); 210 static void complete_service(struct netconfig *nconf, char *port_str); 211 static void clearout_service(void); 212 static void del_mlist(char *hostp, char *dirp); 213 static struct dirlist *dirp_search(struct dirlist *, char *); 214 static int do_export_mount(struct exportlist *, struct statfs *); 215 static int do_mount(struct exportlist *, struct grouplist *, uint64_t, 216 struct expcred *, char *, int, struct statfs *, int, int *); 217 static int do_opt(char **, char **, struct exportlist *, 218 struct grouplist *, int *, uint64_t *, struct expcred *, 219 char *); 220 static struct exportlist *ex_search(fsid_t *, struct exportlisthead *); 221 static struct exportlist *get_exp(void); 222 static void free_dir(struct dirlist *); 223 static void free_exp(struct exportlist *); 224 static void free_grp(struct grouplist *); 225 static void free_host(struct hostlist *); 226 static void free_v4rootexp(void); 227 static void get_exportlist_one(int); 228 static void get_exportlist(int); 229 static void insert_exports(struct exportlist *, struct exportlisthead *); 230 static void free_exports(struct exportlisthead *); 231 static void read_exportfile(int); 232 static int compare_nmount_exportlist(struct iovec *, int, char *); 233 static int compare_export(struct exportlist *, struct exportlist *); 234 static int compare_addr(struct grouplist *, struct grouplist *); 235 static int compare_cred(struct expcred *, struct expcred *); 236 static int compare_secflavor(int *, int *, int); 237 static void delete_export(struct iovec *, int, struct statfs *, char *); 238 static int get_host(char *, struct grouplist *, struct grouplist *); 239 static struct hostlist *get_ht(void); 240 static int get_line(void); 241 static void get_mountlist(void); 242 static int get_net(char *, struct netmsk *, int); 243 static void getexp_err(struct exportlist *, struct grouplist *, const char *); 244 static struct grouplist *get_grp(void); 245 static void hang_dirp(struct dirlist *, struct grouplist *, 246 struct exportlist *, int, struct expcred *, uint64_t); 247 static void huphandler(int sig); 248 static int makemask(struct sockaddr_storage *ssp, int bitlen); 249 static void mntsrv(struct svc_req *, SVCXPRT *); 250 static void nextfield(char **, char **); 251 static void out_of_mem(void) __dead2; 252 static void parsecred(char *, struct expcred *); 253 static int parsesec(char *, struct exportlist *); 254 static int put_exlist(struct dirlist *, XDR *, struct dirlist *, 255 int *, int); 256 static void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 257 static int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 258 struct sockaddr *samask); 259 static int scan_tree(struct dirlist *, struct sockaddr *); 260 static void usage(void); 261 static int xdr_dir(XDR *, char *); 262 static int xdr_explist(XDR *, caddr_t); 263 static int xdr_explist_brief(XDR *, caddr_t); 264 static int xdr_explist_common(XDR *, caddr_t, int); 265 static int xdr_fhs(XDR *, caddr_t); 266 static int xdr_mlist(XDR *, caddr_t); 267 static void terminate(int); 268 static void cp_cred(struct expcred *, struct expcred *); 269 270 static gid_t nogroup(); 271 272 #define EXPHASH(f) (fnv_32_buf((f), sizeof(fsid_t), 0) % exphashsize) 273 static struct exportlisthead *exphead = NULL; 274 static struct exportlisthead *oldexphead = NULL; 275 static int exphashsize = 0; 276 static SLIST_HEAD(, mountlist) mlhead = SLIST_HEAD_INITIALIZER(&mlhead); 277 static char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 278 static char **exnames; 279 static char **hosts = NULL; 280 static int force_v2 = 0; 281 static int warn_admin = 1; 282 static int resvport_only = 1; 283 static int nhosts = 0; 284 static int dir_only = 1; 285 static int dolog = 0; 286 static _Atomic(int) got_sighup = 0; 287 static int xcreated = 0; 288 289 static char *svcport_str = NULL; 290 static int mallocd_svcport = 0; 291 static int *sock_fd; 292 static int sock_fdcnt; 293 static int sock_fdpos; 294 static int suspend_nfsd = 0; 295 static int nofork = 0; 296 static int skiplocalhost = 0; 297 static int alldirs_fail = 0; 298 299 static int opt_flags; 300 static int have_v6 = 1; 301 302 static int v4root_phase = 0; 303 static char v4root_dirpath[PATH_MAX + 1]; 304 static struct exportlist *v4root_ep = NULL; 305 static int has_publicfh = 0; 306 static int has_set_publicfh = 0; 307 308 static struct pidfh *pfh = NULL; 309 310 /* Temporary storage for credentials' groups. */ 311 static long tngroups_max; 312 static gid_t *tmp_groups = NULL; 313 314 /* Bits for opt_flags above */ 315 #define OP_MAPROOT 0x01 316 #define OP_MAPALL 0x02 317 /* 0x4 free */ 318 #define OP_MASK 0x08 319 #define OP_NET 0x10 320 #define OP_ALLDIRS 0x40 321 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 322 #define OP_QUIET 0x100 323 #define OP_MASKLEN 0x200 324 #define OP_SEC 0x400 325 #define OP_CLASSMASK 0x800 /* mask not specified, is Class A/B/C default */ 326 #define OP_NOTROOT 0x1000 /* Mark the the mount path is not a fs root */ 327 328 #ifdef DEBUG 329 static int debug = 1; 330 static void SYSLOG(int, const char *, ...) __printflike(2, 3); 331 #define syslog SYSLOG 332 #else 333 static int debug = 0; 334 #endif 335 336 /* 337 * The LOGDEBUG() syslog() calls are always compiled into the daemon. 338 * To enable them, create a file at _PATH_MOUNTDDEBUG. This file can be empty. 339 * To disable the logging, just delete the file at _PATH_MOUNTDDEBUG. 340 */ 341 static int logdebug = 0; 342 #define LOGDEBUG(format, ...) \ 343 (logdebug ? syslog(LOG_DEBUG, format, ## __VA_ARGS__) : 0) 344 345 /* 346 * Similar to strsep(), but it allows for quoted strings 347 * and escaped characters. 348 * 349 * It returns the string (or NULL, if *stringp is NULL), 350 * which is a de-quoted version of the string if necessary. 351 * 352 * It modifies *stringp in place. 353 */ 354 static char * 355 strsep_quote(char **stringp, const char *delim) 356 { 357 char *srcptr, *dstptr, *retval; 358 char quot = 0; 359 360 if (stringp == NULL || *stringp == NULL) 361 return (NULL); 362 363 srcptr = dstptr = retval = *stringp; 364 365 while (*srcptr) { 366 /* 367 * We're looking for several edge cases here. 368 * First: if we're in quote state (quot != 0), 369 * then we ignore the delim characters, but otherwise 370 * process as normal, unless it is the quote character. 371 * Second: if the current character is a backslash, 372 * we take the next character as-is, without checking 373 * for delim, quote, or backslash. Exception: if the 374 * next character is a NUL, that's the end of the string. 375 * Third: if the character is a quote character, we toggle 376 * quote state. 377 * Otherwise: check the current character for NUL, or 378 * being in delim, and end the string if either is true. 379 */ 380 if (*srcptr == '\\') { 381 srcptr++; 382 /* 383 * The edge case here is if the next character 384 * is NUL, we want to stop processing. But if 385 * it's not NUL, then we simply want to copy it. 386 */ 387 if (*srcptr) { 388 *dstptr++ = *srcptr++; 389 } 390 continue; 391 } 392 if (quot == 0 && (*srcptr == '\'' || *srcptr == '"')) { 393 quot = *srcptr++; 394 continue; 395 } 396 if (quot && *srcptr == quot) { 397 /* End of the quoted part */ 398 quot = 0; 399 srcptr++; 400 continue; 401 } 402 if (!quot && strchr(delim, *srcptr)) 403 break; 404 *dstptr++ = *srcptr++; 405 } 406 407 *stringp = (*srcptr == '\0') ? NULL : srcptr + 1; 408 *dstptr = 0; /* Terminate the string */ 409 return (retval); 410 } 411 412 /* 413 * Mountd server for NFS mount protocol as described in: 414 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 415 * The optional arguments are the exports file name 416 * default: _PATH_EXPORTS 417 * and "-n" to allow nonroot mount. 418 */ 419 int 420 main(int argc, char **argv) 421 { 422 fd_set readfds; 423 struct netconfig *nconf; 424 char *endptr, **hosts_bak; 425 void *nc_handle; 426 pid_t otherpid; 427 in_port_t svcport; 428 int c, k, s; 429 int maxrec = RPC_MAXDATASIZE; 430 int attempt_cnt, port_len, port_pos, ret; 431 char **port_list; 432 uint64_t curtime, nexttime; 433 struct timeval tv; 434 struct timespec tp; 435 sigset_t sig_mask, sighup_mask; 436 int enable_rpcbind; 437 438 enable_rpcbind = 1; 439 /* Check that another mountd isn't already running. */ 440 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 441 if (pfh == NULL) { 442 if (errno == EEXIST) 443 errx(1, "mountd already running, pid: %d.", otherpid); 444 warn("cannot open or create pidfile"); 445 } 446 447 openlog("mountd", LOG_PID, LOG_DAEMON); 448 449 /* How many groups do we support? */ 450 tngroups_max = sysconf(_SC_NGROUPS_MAX); 451 if (tngroups_max == -1) 452 tngroups_max = NGROUPS_MAX; 453 /* Add space for the effective GID. */ 454 ++tngroups_max; 455 tmp_groups = malloc(tngroups_max); 456 if (tmp_groups == NULL) 457 out_of_mem(); 458 459 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 460 if (s < 0) 461 have_v6 = 0; 462 else 463 close(s); 464 465 while ((c = getopt(argc, argv, "2Aadeh:lNnp:RrSs")) != -1) 466 switch (c) { 467 case '2': 468 force_v2 = 1; 469 break; 470 case 'A': 471 warn_admin = 0; 472 break; 473 case 'a': 474 alldirs_fail = 1; 475 break; 476 case 'e': 477 /* now a no-op, since this is the default */ 478 break; 479 case 'n': 480 resvport_only = 0; 481 break; 482 case 'R': 483 /* Do not support Mount protocol */ 484 enable_rpcbind = 0; 485 break; 486 case 'r': 487 dir_only = 0; 488 break; 489 case 'd': 490 debug = debug ? 0 : 1; 491 break; 492 case 'l': 493 dolog = 1; 494 break; 495 case 'p': 496 endptr = NULL; 497 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 498 if (endptr == NULL || *endptr != '\0' || 499 svcport == 0 || svcport >= IPPORT_MAX) 500 usage(); 501 svcport_str = strdup(optarg); 502 break; 503 case 'h': 504 ++nhosts; 505 hosts_bak = hosts; 506 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 507 if (hosts_bak == NULL) { 508 if (hosts != NULL) { 509 for (k = 0; k < nhosts; k++) 510 free(hosts[k]); 511 free(hosts); 512 out_of_mem(); 513 } 514 } 515 hosts = hosts_bak; 516 hosts[nhosts - 1] = strdup(optarg); 517 if (hosts[nhosts - 1] == NULL) { 518 for (k = 0; k < (nhosts - 1); k++) 519 free(hosts[k]); 520 free(hosts); 521 out_of_mem(); 522 } 523 break; 524 case 'S': 525 suspend_nfsd = 1; 526 break; 527 case 'N': 528 nofork = 1; 529 break; 530 case 's': 531 skiplocalhost = 1; 532 break; 533 default: 534 usage(); 535 } 536 if (enable_rpcbind == 0) { 537 if (svcport_str != NULL) { 538 warnx("-p option not compatible with -R, ignored"); 539 free(svcport_str); 540 svcport_str = NULL; 541 } 542 if (nhosts > 0) { 543 warnx("-h option not compatible with -R, ignored"); 544 for (k = 0; k < nhosts; k++) 545 free(hosts[k]); 546 free(hosts); 547 hosts = NULL; 548 nhosts = 0; 549 } 550 } 551 552 if (nhosts == 0 && skiplocalhost != 0) 553 warnx("-s without -h, ignored"); 554 555 if (modfind("nfsd") < 0) { 556 /* Not present in kernel, try loading it */ 557 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 558 errx(1, "NFS server is not available"); 559 } 560 561 argc -= optind; 562 argv += optind; 563 if (argc > 0) 564 exnames = argv; 565 else 566 exnames = exnames_default; 567 if (debug) 568 warnx("getting export list"); 569 get_exportlist(0); 570 if (debug) 571 warnx("getting mount list"); 572 get_mountlist(); 573 if (debug) 574 warnx("here we go"); 575 if (debug == 0 && nofork == 0) { 576 daemon(0, 0); 577 signal(SIGINT, SIG_IGN); 578 signal(SIGQUIT, SIG_IGN); 579 } 580 signal(SIGHUP, huphandler); 581 signal(SIGTERM, terminate); 582 signal(SIGPIPE, SIG_IGN); 583 584 pidfile_write(pfh); 585 586 if (enable_rpcbind != 0) { 587 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 588 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 589 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 590 591 if (!resvport_only) { 592 if (sysctlbyname("vfs.nfsd.nfs_privport", NULL, NULL, 593 &resvport_only, sizeof(resvport_only)) != 0 && 594 errno != ENOENT) { 595 syslog(LOG_ERR, "sysctl: %m"); 596 exit(1); 597 } 598 } 599 600 /* 601 * If no hosts were specified, add a wildcard entry to bind to 602 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added 603 * to the list. 604 */ 605 if (nhosts == 0) { 606 hosts = malloc(sizeof(char *)); 607 if (hosts == NULL) 608 out_of_mem(); 609 hosts[0] = "*"; 610 nhosts = 1; 611 } else if (skiplocalhost == 0) { 612 hosts_bak = hosts; 613 if (have_v6) { 614 hosts_bak = realloc(hosts, (nhosts + 2) * 615 sizeof(char *)); 616 if (hosts_bak == NULL) { 617 for (k = 0; k < nhosts; k++) 618 free(hosts[k]); 619 free(hosts); 620 out_of_mem(); 621 } else 622 hosts = hosts_bak; 623 nhosts += 2; 624 hosts[nhosts - 2] = "::1"; 625 } else { 626 hosts_bak = realloc(hosts, (nhosts + 1) * 627 sizeof(char *)); 628 if (hosts_bak == NULL) { 629 for (k = 0; k < nhosts; k++) 630 free(hosts[k]); 631 free(hosts); 632 out_of_mem(); 633 } else { 634 nhosts += 1; 635 hosts = hosts_bak; 636 } 637 } 638 639 hosts[nhosts - 1] = "127.0.0.1"; 640 } 641 } 642 643 attempt_cnt = 1; 644 sock_fdcnt = 0; 645 sock_fd = NULL; 646 port_list = NULL; 647 port_len = 0; 648 if (enable_rpcbind != 0) { 649 nc_handle = setnetconfig(); 650 while ((nconf = getnetconfig(nc_handle))) { 651 if (nconf->nc_flag & NC_VISIBLE) { 652 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 653 "inet6") == 0) { 654 /* DO NOTHING */ 655 } else { 656 ret = create_service(nconf); 657 if (ret == 1) 658 /* Ignore this call */ 659 continue; 660 if (ret < 0) { 661 /* 662 * Failed to bind port, so close 663 * off all sockets created and 664 * try again if the port# was 665 * dynamically assigned via 666 * bind(2). 667 */ 668 clearout_service(); 669 if (mallocd_svcport != 0 && 670 attempt_cnt < 671 GETPORT_MAXTRY) { 672 free(svcport_str); 673 svcport_str = NULL; 674 mallocd_svcport = 0; 675 } else { 676 errno = EADDRINUSE; 677 syslog(LOG_ERR, 678 "bindresvport_sa:" 679 " %m"); 680 exit(1); 681 } 682 683 /* 684 * Start over at the first 685 * service. 686 */ 687 free(sock_fd); 688 sock_fdcnt = 0; 689 sock_fd = NULL; 690 nc_handle = setnetconfig(); 691 attempt_cnt++; 692 } else if (mallocd_svcport != 0 && 693 attempt_cnt == GETPORT_MAXTRY) { 694 /* 695 * For the last attempt, allow 696 * different port #s for each 697 * nconf by saving the 698 * svcport_str setting it back 699 * to NULL. 700 */ 701 port_list = realloc(port_list, 702 (port_len + 1) * 703 sizeof(char *)); 704 if (port_list == NULL) 705 out_of_mem(); 706 port_list[port_len++] = 707 svcport_str; 708 svcport_str = NULL; 709 mallocd_svcport = 0; 710 } 711 } 712 } 713 } 714 715 /* 716 * Successfully bound the ports, so call complete_service() to 717 * do the rest of the setup on the service(s). 718 */ 719 sock_fdpos = 0; 720 port_pos = 0; 721 nc_handle = setnetconfig(); 722 while ((nconf = getnetconfig(nc_handle))) { 723 if (nconf->nc_flag & NC_VISIBLE) { 724 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 725 "inet6") == 0) { 726 /* DO NOTHING */ 727 } else if (port_list != NULL) { 728 if (port_pos >= port_len) { 729 syslog(LOG_ERR, "too many" 730 " port#s"); 731 exit(1); 732 } 733 complete_service(nconf, 734 port_list[port_pos++]); 735 } else 736 complete_service(nconf, svcport_str); 737 } 738 } 739 endnetconfig(nc_handle); 740 free(sock_fd); 741 if (port_list != NULL) { 742 for (port_pos = 0; port_pos < port_len; port_pos++) 743 free(port_list[port_pos]); 744 free(port_list); 745 } 746 747 if (xcreated == 0) { 748 syslog(LOG_ERR, "could not create any services"); 749 exit(1); 750 } 751 } 752 753 /* Expand svc_run() here so that we can call get_exportlist(). */ 754 curtime = nexttime = 0; 755 sigemptyset(&sighup_mask); 756 sigaddset(&sighup_mask, SIGHUP); 757 for (;;) { 758 clock_gettime(CLOCK_MONOTONIC, &tp); 759 curtime = tp.tv_sec; 760 curtime = curtime * 1000000 + tp.tv_nsec / 1000; 761 sigprocmask(SIG_BLOCK, &sighup_mask, &sig_mask); 762 if (got_sighup && curtime >= nexttime) { 763 got_sighup = 0; 764 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 765 get_exportlist(1); 766 clock_gettime(CLOCK_MONOTONIC, &tp); 767 nexttime = tp.tv_sec; 768 nexttime = nexttime * 1000000 + tp.tv_nsec / 1000 + 769 RELOADDELAY; 770 } else 771 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 772 773 /* 774 * If a reload is pending, poll for received request(s), 775 * otherwise set a RELOADDELAY timeout, since a SIGHUP 776 * could be processed between the got_sighup test and 777 * the select() system call. 778 */ 779 tv.tv_sec = 0; 780 if (got_sighup) 781 tv.tv_usec = 0; 782 else 783 tv.tv_usec = RELOADDELAY; 784 if (enable_rpcbind != 0) { 785 readfds = svc_fdset; 786 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, 787 &tv)) { 788 case -1: 789 if (errno == EINTR) { 790 /* Allow a reload now. */ 791 nexttime = 0; 792 continue; 793 } 794 syslog(LOG_ERR, "mountd died: select: %m"); 795 exit(1); 796 case 0: 797 /* Allow a reload now. */ 798 nexttime = 0; 799 continue; 800 default: 801 svc_getreqset(&readfds); 802 } 803 } else { 804 /* Simply wait for a signal. */ 805 sigsuspend(&sig_mask); 806 } 807 } 808 } 809 810 /* 811 * This routine creates and binds sockets on the appropriate 812 * addresses. It gets called one time for each transport. 813 * It returns 0 upon success, 1 for ignore the call and -1 to indicate 814 * bind failed with EADDRINUSE. 815 * Any file descriptors that have been created are stored in sock_fd and 816 * the total count of them is maintained in sock_fdcnt. 817 */ 818 static int 819 create_service(struct netconfig *nconf) 820 { 821 struct addrinfo hints, *res = NULL; 822 struct sockaddr_in *sin; 823 struct sockaddr_in6 *sin6; 824 struct __rpc_sockinfo si; 825 int aicode; 826 int fd; 827 int nhostsbak; 828 int one = 1; 829 int r; 830 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 831 int mallocd_res; 832 833 if ((nconf->nc_semantics != NC_TPI_CLTS) && 834 (nconf->nc_semantics != NC_TPI_COTS) && 835 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 836 return (1); /* not my type */ 837 838 /* 839 * XXX - using RPC library internal functions. 840 */ 841 if (!__rpc_nconf2sockinfo(nconf, &si)) { 842 syslog(LOG_ERR, "cannot get information for %s", 843 nconf->nc_netid); 844 return (1); 845 } 846 847 /* Get mountd's address on this transport */ 848 memset(&hints, 0, sizeof hints); 849 hints.ai_family = si.si_af; 850 hints.ai_socktype = si.si_socktype; 851 hints.ai_protocol = si.si_proto; 852 853 /* 854 * Bind to specific IPs if asked to 855 */ 856 nhostsbak = nhosts; 857 while (nhostsbak > 0) { 858 --nhostsbak; 859 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int)); 860 if (sock_fd == NULL) 861 out_of_mem(); 862 sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */ 863 mallocd_res = 0; 864 865 hints.ai_flags = AI_PASSIVE; 866 867 /* 868 * XXX - using RPC library internal functions. 869 */ 870 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 871 int non_fatal = 0; 872 if (errno == EAFNOSUPPORT && 873 nconf->nc_semantics != NC_TPI_CLTS) 874 non_fatal = 1; 875 876 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 877 "cannot create socket for %s", nconf->nc_netid); 878 if (non_fatal != 0) 879 continue; 880 exit(1); 881 } 882 883 switch (hints.ai_family) { 884 case AF_INET: 885 if (inet_pton(AF_INET, hosts[nhostsbak], 886 host_addr) == 1) { 887 hints.ai_flags |= AI_NUMERICHOST; 888 } else { 889 /* 890 * Skip if we have an AF_INET6 address. 891 */ 892 if (inet_pton(AF_INET6, hosts[nhostsbak], 893 host_addr) == 1) { 894 close(fd); 895 continue; 896 } 897 } 898 break; 899 case AF_INET6: 900 if (inet_pton(AF_INET6, hosts[nhostsbak], 901 host_addr) == 1) { 902 hints.ai_flags |= AI_NUMERICHOST; 903 } else { 904 /* 905 * Skip if we have an AF_INET address. 906 */ 907 if (inet_pton(AF_INET, hosts[nhostsbak], 908 host_addr) == 1) { 909 close(fd); 910 continue; 911 } 912 } 913 914 /* 915 * We're doing host-based access checks here, so don't 916 * allow v4-in-v6 to confuse things. The kernel will 917 * disable it by default on NFS sockets too. 918 */ 919 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 920 sizeof one) < 0) { 921 syslog(LOG_ERR, 922 "can't disable v4-in-v6 on IPv6 socket"); 923 exit(1); 924 } 925 break; 926 default: 927 break; 928 } 929 930 /* 931 * If no hosts were specified, just bind to INADDR_ANY 932 */ 933 if (strcmp("*", hosts[nhostsbak]) == 0) { 934 if (svcport_str == NULL) { 935 res = malloc(sizeof(struct addrinfo)); 936 if (res == NULL) 937 out_of_mem(); 938 mallocd_res = 1; 939 res->ai_flags = hints.ai_flags; 940 res->ai_family = hints.ai_family; 941 res->ai_protocol = hints.ai_protocol; 942 switch (res->ai_family) { 943 case AF_INET: 944 sin = malloc(sizeof(struct sockaddr_in)); 945 if (sin == NULL) 946 out_of_mem(); 947 sin->sin_family = AF_INET; 948 sin->sin_port = htons(0); 949 sin->sin_addr.s_addr = htonl(INADDR_ANY); 950 res->ai_addr = (struct sockaddr*) sin; 951 res->ai_addrlen = (socklen_t) 952 sizeof(struct sockaddr_in); 953 break; 954 case AF_INET6: 955 sin6 = malloc(sizeof(struct sockaddr_in6)); 956 if (sin6 == NULL) 957 out_of_mem(); 958 sin6->sin6_family = AF_INET6; 959 sin6->sin6_port = htons(0); 960 sin6->sin6_addr = in6addr_any; 961 res->ai_addr = (struct sockaddr*) sin6; 962 res->ai_addrlen = (socklen_t) 963 sizeof(struct sockaddr_in6); 964 break; 965 default: 966 syslog(LOG_ERR, "bad addr fam %d", 967 res->ai_family); 968 exit(1); 969 } 970 } else { 971 if ((aicode = getaddrinfo(NULL, svcport_str, 972 &hints, &res)) != 0) { 973 syslog(LOG_ERR, 974 "cannot get local address for %s: %s", 975 nconf->nc_netid, 976 gai_strerror(aicode)); 977 close(fd); 978 continue; 979 } 980 } 981 } else { 982 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 983 &hints, &res)) != 0) { 984 syslog(LOG_ERR, 985 "cannot get local address for %s: %s", 986 nconf->nc_netid, gai_strerror(aicode)); 987 close(fd); 988 continue; 989 } 990 } 991 992 /* Store the fd. */ 993 sock_fd[sock_fdcnt - 1] = fd; 994 995 /* Now, attempt the bind. */ 996 r = bindresvport_sa(fd, res->ai_addr); 997 if (r != 0) { 998 if (errno == EADDRINUSE && mallocd_svcport != 0) { 999 if (mallocd_res != 0) { 1000 free(res->ai_addr); 1001 free(res); 1002 } else 1003 freeaddrinfo(res); 1004 return (-1); 1005 } 1006 syslog(LOG_ERR, "bindresvport_sa: %m"); 1007 exit(1); 1008 } 1009 1010 if (svcport_str == NULL) { 1011 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 1012 if (svcport_str == NULL) 1013 out_of_mem(); 1014 mallocd_svcport = 1; 1015 1016 if (getnameinfo(res->ai_addr, 1017 res->ai_addr->sa_len, NULL, NI_MAXHOST, 1018 svcport_str, NI_MAXSERV * sizeof(char), 1019 NI_NUMERICHOST | NI_NUMERICSERV)) 1020 errx(1, "Cannot get port number"); 1021 } 1022 if (mallocd_res != 0) { 1023 free(res->ai_addr); 1024 free(res); 1025 } else 1026 freeaddrinfo(res); 1027 res = NULL; 1028 } 1029 return (0); 1030 } 1031 1032 /* 1033 * Called after all the create_service() calls have succeeded, to complete 1034 * the setup and registration. 1035 */ 1036 static void 1037 complete_service(struct netconfig *nconf, char *port_str) 1038 { 1039 struct addrinfo hints, *res = NULL; 1040 struct __rpc_sockinfo si; 1041 struct netbuf servaddr; 1042 SVCXPRT *transp = NULL; 1043 int aicode, fd, nhostsbak; 1044 int registered = 0; 1045 1046 if ((nconf->nc_semantics != NC_TPI_CLTS) && 1047 (nconf->nc_semantics != NC_TPI_COTS) && 1048 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 1049 return; /* not my type */ 1050 1051 /* 1052 * XXX - using RPC library internal functions. 1053 */ 1054 if (!__rpc_nconf2sockinfo(nconf, &si)) { 1055 syslog(LOG_ERR, "cannot get information for %s", 1056 nconf->nc_netid); 1057 return; 1058 } 1059 1060 nhostsbak = nhosts; 1061 while (nhostsbak > 0) { 1062 --nhostsbak; 1063 if (sock_fdpos >= sock_fdcnt) { 1064 /* Should never happen. */ 1065 syslog(LOG_ERR, "Ran out of socket fd's"); 1066 return; 1067 } 1068 fd = sock_fd[sock_fdpos++]; 1069 if (fd < 0) 1070 continue; 1071 1072 /* 1073 * Using -1 tells listen(2) to use 1074 * kern.ipc.soacceptqueue for the backlog. 1075 */ 1076 if (nconf->nc_semantics != NC_TPI_CLTS) 1077 listen(fd, -1); 1078 1079 if (nconf->nc_semantics == NC_TPI_CLTS ) 1080 transp = svc_dg_create(fd, 0, 0); 1081 else 1082 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 1083 RPC_MAXDATASIZE); 1084 1085 if (transp != (SVCXPRT *) NULL) { 1086 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS, mntsrv, 1087 NULL)) 1088 syslog(LOG_ERR, 1089 "can't register %s MOUNTVERS service", 1090 nconf->nc_netid); 1091 if (!force_v2) { 1092 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS3, 1093 mntsrv, NULL)) 1094 syslog(LOG_ERR, 1095 "can't register %s MOUNTVERS3 service", 1096 nconf->nc_netid); 1097 } 1098 } else 1099 syslog(LOG_WARNING, "can't create %s services", 1100 nconf->nc_netid); 1101 1102 if (registered == 0) { 1103 registered = 1; 1104 memset(&hints, 0, sizeof hints); 1105 hints.ai_flags = AI_PASSIVE; 1106 hints.ai_family = si.si_af; 1107 hints.ai_socktype = si.si_socktype; 1108 hints.ai_protocol = si.si_proto; 1109 1110 if ((aicode = getaddrinfo(NULL, port_str, &hints, 1111 &res)) != 0) { 1112 syslog(LOG_ERR, "cannot get local address: %s", 1113 gai_strerror(aicode)); 1114 exit(1); 1115 } 1116 1117 servaddr.buf = malloc(res->ai_addrlen); 1118 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 1119 servaddr.len = res->ai_addrlen; 1120 1121 rpcb_set(MOUNTPROG, MOUNTVERS, nconf, &servaddr); 1122 rpcb_set(MOUNTPROG, MOUNTVERS3, nconf, &servaddr); 1123 1124 xcreated++; 1125 freeaddrinfo(res); 1126 } 1127 } /* end while */ 1128 } 1129 1130 /* 1131 * Clear out sockets after a failure to bind one of them, so that the 1132 * cycle of socket creation/binding can start anew. 1133 */ 1134 static void 1135 clearout_service(void) 1136 { 1137 int i; 1138 1139 for (i = 0; i < sock_fdcnt; i++) { 1140 if (sock_fd[i] >= 0) { 1141 shutdown(sock_fd[i], SHUT_RDWR); 1142 close(sock_fd[i]); 1143 } 1144 } 1145 } 1146 1147 static void 1148 usage(void) 1149 { 1150 fprintf(stderr, 1151 "usage: mountd [-2] [-d] [-e] [-l] [-N] [-n] [-p <port>] [-r] [-S] " 1152 "[-s] [-h <bindip>] [export_file ...]\n"); 1153 exit(1); 1154 } 1155 1156 /* 1157 * The mount rpc service 1158 */ 1159 void 1160 mntsrv(struct svc_req *rqstp, SVCXPRT *transp) 1161 { 1162 struct exportlist *ep; 1163 struct dirlist *dp; 1164 struct fhreturn fhr; 1165 struct stat stb; 1166 struct statfs fsb; 1167 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 1168 int lookup_failed = 1; 1169 struct sockaddr *saddr; 1170 u_short sport; 1171 char rpcpath[MNTPATHLEN + 1], dirpath[MAXPATHLEN]; 1172 int defset, hostset; 1173 long bad = 0; 1174 sigset_t sighup_mask; 1175 int numsecflavors, *secflavorsp; 1176 1177 sigemptyset(&sighup_mask); 1178 sigaddset(&sighup_mask, SIGHUP); 1179 saddr = svc_getrpccaller(transp)->buf; 1180 switch (saddr->sa_family) { 1181 case AF_INET6: 1182 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 1183 break; 1184 case AF_INET: 1185 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 1186 break; 1187 default: 1188 syslog(LOG_ERR, "request from unknown address family"); 1189 return; 1190 } 1191 switch (rqstp->rq_proc) { 1192 case MOUNTPROC_MNT: 1193 case MOUNTPROC_UMNT: 1194 case MOUNTPROC_UMNTALL: 1195 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, 1196 sizeof host, NULL, 0, 0); 1197 } 1198 getnameinfo(saddr, saddr->sa_len, numerichost, 1199 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 1200 switch (rqstp->rq_proc) { 1201 case NULLPROC: 1202 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 1203 syslog(LOG_ERR, "can't send reply"); 1204 return; 1205 case MOUNTPROC_MNT: 1206 if (sport >= IPPORT_RESERVED && resvport_only) { 1207 syslog(LOG_NOTICE, 1208 "mount request from %s from unprivileged port", 1209 numerichost); 1210 svcerr_weakauth(transp); 1211 return; 1212 } 1213 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1214 syslog(LOG_NOTICE, "undecodable mount request from %s", 1215 numerichost); 1216 svcerr_decode(transp); 1217 return; 1218 } 1219 1220 /* 1221 * Get the real pathname and make sure it is a directory 1222 * or a regular file if the -r option was specified 1223 * and it exists. 1224 */ 1225 if (realpath(rpcpath, dirpath) == NULL || 1226 stat(dirpath, &stb) < 0 || 1227 statfs(dirpath, &fsb) < 0) { 1228 chdir("/"); /* Just in case realpath doesn't */ 1229 syslog(LOG_NOTICE, 1230 "mount request from %s for non existent path %s", 1231 numerichost, dirpath); 1232 if (debug) 1233 warnx("stat failed on %s", dirpath); 1234 bad = ENOENT; /* We will send error reply later */ 1235 } 1236 if (!bad && 1237 !S_ISDIR(stb.st_mode) && 1238 (dir_only || !S_ISREG(stb.st_mode))) { 1239 syslog(LOG_NOTICE, 1240 "mount request from %s for non-directory path %s", 1241 numerichost, dirpath); 1242 if (debug) 1243 warnx("mounting non-directory %s", dirpath); 1244 bad = ENOTDIR; /* We will send error reply later */ 1245 } 1246 1247 /* Check in the exports list */ 1248 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1249 if (bad) 1250 ep = NULL; 1251 else 1252 ep = ex_search(&fsb.f_fsid, exphead); 1253 hostset = defset = 0; 1254 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset, 1255 &numsecflavors, &secflavorsp) || 1256 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 1257 chk_host(dp, saddr, &defset, &hostset, &numsecflavors, 1258 &secflavorsp)) || 1259 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 1260 scan_tree(ep->ex_dirl, saddr) == 0))) { 1261 if (bad) { 1262 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1263 (caddr_t)&bad)) 1264 syslog(LOG_ERR, "can't send reply"); 1265 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1266 return; 1267 } 1268 if (hostset & DP_HOSTSET) { 1269 fhr.fhr_flag = hostset; 1270 fhr.fhr_numsecflavors = numsecflavors; 1271 fhr.fhr_secflavors = secflavorsp; 1272 } else { 1273 fhr.fhr_flag = defset; 1274 fhr.fhr_numsecflavors = ep->ex_defnumsecflavors; 1275 fhr.fhr_secflavors = ep->ex_defsecflavors; 1276 } 1277 fhr.fhr_vers = rqstp->rq_vers; 1278 /* Get the file handle */ 1279 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 1280 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 1281 bad = errno; 1282 syslog(LOG_ERR, "can't get fh for %s", dirpath); 1283 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1284 (caddr_t)&bad)) 1285 syslog(LOG_ERR, "can't send reply"); 1286 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1287 return; 1288 } 1289 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, 1290 (caddr_t)&fhr)) 1291 syslog(LOG_ERR, "can't send reply"); 1292 if (!lookup_failed) 1293 add_mlist(host, dirpath); 1294 else 1295 add_mlist(numerichost, dirpath); 1296 if (debug) 1297 warnx("mount successful"); 1298 if (dolog) 1299 syslog(LOG_NOTICE, 1300 "mount request succeeded from %s for %s", 1301 numerichost, dirpath); 1302 } else { 1303 if (!bad) 1304 bad = EACCES; 1305 syslog(LOG_NOTICE, 1306 "mount request denied from %s for %s", 1307 numerichost, dirpath); 1308 } 1309 1310 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, 1311 (caddr_t)&bad)) 1312 syslog(LOG_ERR, "can't send reply"); 1313 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1314 return; 1315 case MOUNTPROC_DUMP: 1316 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL)) 1317 syslog(LOG_ERR, "can't send reply"); 1318 else if (dolog) 1319 syslog(LOG_NOTICE, 1320 "dump request succeeded from %s", 1321 numerichost); 1322 return; 1323 case MOUNTPROC_UMNT: 1324 if (sport >= IPPORT_RESERVED && resvport_only) { 1325 syslog(LOG_NOTICE, 1326 "umount request from %s from unprivileged port", 1327 numerichost); 1328 svcerr_weakauth(transp); 1329 return; 1330 } 1331 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1332 syslog(LOG_NOTICE, "undecodable umount request from %s", 1333 numerichost); 1334 svcerr_decode(transp); 1335 return; 1336 } 1337 if (realpath(rpcpath, dirpath) == NULL) { 1338 syslog(LOG_NOTICE, "umount request from %s " 1339 "for non existent path %s", 1340 numerichost, dirpath); 1341 } 1342 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1343 syslog(LOG_ERR, "can't send reply"); 1344 if (!lookup_failed) 1345 del_mlist(host, dirpath); 1346 del_mlist(numerichost, dirpath); 1347 if (dolog) 1348 syslog(LOG_NOTICE, 1349 "umount request succeeded from %s for %s", 1350 numerichost, dirpath); 1351 return; 1352 case MOUNTPROC_UMNTALL: 1353 if (sport >= IPPORT_RESERVED && resvport_only) { 1354 syslog(LOG_NOTICE, 1355 "umountall request from %s from unprivileged port", 1356 numerichost); 1357 svcerr_weakauth(transp); 1358 return; 1359 } 1360 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1361 syslog(LOG_ERR, "can't send reply"); 1362 if (!lookup_failed) 1363 del_mlist(host, NULL); 1364 del_mlist(numerichost, NULL); 1365 if (dolog) 1366 syslog(LOG_NOTICE, 1367 "umountall request succeeded from %s", 1368 numerichost); 1369 return; 1370 case MOUNTPROC_EXPORT: 1371 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL)) 1372 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, 1373 (caddr_t)NULL)) 1374 syslog(LOG_ERR, "can't send reply"); 1375 if (dolog) 1376 syslog(LOG_NOTICE, 1377 "export request succeeded from %s", 1378 numerichost); 1379 return; 1380 default: 1381 svcerr_noproc(transp); 1382 return; 1383 } 1384 } 1385 1386 /* 1387 * Xdr conversion for a dirpath string 1388 */ 1389 static int 1390 xdr_dir(XDR *xdrsp, char *dirp) 1391 { 1392 return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); 1393 } 1394 1395 /* 1396 * Xdr routine to generate file handle reply 1397 */ 1398 static int 1399 xdr_fhs(XDR *xdrsp, caddr_t cp) 1400 { 1401 struct fhreturn *fhrp = (struct fhreturn *)cp; 1402 u_long ok = 0, len, auth; 1403 int i; 1404 1405 if (!xdr_long(xdrsp, &ok)) 1406 return (0); 1407 switch (fhrp->fhr_vers) { 1408 case 1: 1409 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 1410 case 3: 1411 len = NFSX_V3FH; 1412 if (!xdr_long(xdrsp, &len)) 1413 return (0); 1414 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 1415 return (0); 1416 if (fhrp->fhr_numsecflavors) { 1417 if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors)) 1418 return (0); 1419 for (i = 0; i < fhrp->fhr_numsecflavors; i++) 1420 if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i])) 1421 return (0); 1422 return (1); 1423 } else { 1424 auth = AUTH_SYS; 1425 len = 1; 1426 if (!xdr_long(xdrsp, &len)) 1427 return (0); 1428 return (xdr_long(xdrsp, &auth)); 1429 } 1430 } 1431 return (0); 1432 } 1433 1434 static int 1435 xdr_mlist(XDR *xdrsp, caddr_t cp __unused) 1436 { 1437 struct mountlist *mlp; 1438 int true = 1; 1439 int false = 0; 1440 char *strp; 1441 1442 SLIST_FOREACH(mlp, &mlhead, next) { 1443 if (!xdr_bool(xdrsp, &true)) 1444 return (0); 1445 strp = &mlp->ml_host[0]; 1446 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 1447 return (0); 1448 strp = &mlp->ml_dirp[0]; 1449 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1450 return (0); 1451 } 1452 if (!xdr_bool(xdrsp, &false)) 1453 return (0); 1454 return (1); 1455 } 1456 1457 /* 1458 * Xdr conversion for export list 1459 */ 1460 static int 1461 xdr_explist_common(XDR *xdrsp, caddr_t cp __unused, int brief) 1462 { 1463 struct exportlist *ep; 1464 int false = 0; 1465 int putdef; 1466 sigset_t sighup_mask; 1467 int i; 1468 1469 sigemptyset(&sighup_mask); 1470 sigaddset(&sighup_mask, SIGHUP); 1471 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1472 1473 for (i = 0; i < exphashsize; i++) 1474 SLIST_FOREACH(ep, &exphead[i], entries) { 1475 putdef = 0; 1476 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 1477 &putdef, brief)) 1478 goto errout; 1479 if (ep->ex_defdir && putdef == 0 && 1480 put_exlist(ep->ex_defdir, xdrsp, NULL, 1481 &putdef, brief)) 1482 goto errout; 1483 } 1484 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1485 if (!xdr_bool(xdrsp, &false)) 1486 return (0); 1487 return (1); 1488 errout: 1489 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1490 return (0); 1491 } 1492 1493 /* 1494 * Called from xdr_explist() to traverse the tree and export the 1495 * directory paths. 1496 */ 1497 static int 1498 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, 1499 int brief) 1500 { 1501 struct grouplist *grp; 1502 struct hostlist *hp; 1503 int true = 1; 1504 int false = 0; 1505 int gotalldir = 0; 1506 char *strp; 1507 1508 if (dp) { 1509 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1510 return (1); 1511 if (!xdr_bool(xdrsp, &true)) 1512 return (1); 1513 strp = dp->dp_dirp; 1514 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1515 return (1); 1516 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1517 gotalldir = 1; 1518 *putdefp = 1; 1519 } 1520 if (brief) { 1521 if (!xdr_bool(xdrsp, &true)) 1522 return (1); 1523 strp = "(...)"; 1524 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1525 return (1); 1526 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1527 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1528 hp = dp->dp_hosts; 1529 while (hp) { 1530 grp = hp->ht_grp; 1531 if (grp->gr_type == GT_HOST) { 1532 if (!xdr_bool(xdrsp, &true)) 1533 return (1); 1534 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1535 if (!xdr_string(xdrsp, &strp, 1536 MNTNAMLEN)) 1537 return (1); 1538 } else if (grp->gr_type == GT_NET) { 1539 if (!xdr_bool(xdrsp, &true)) 1540 return (1); 1541 strp = grp->gr_ptr.gt_net.nt_name; 1542 if (!xdr_string(xdrsp, &strp, 1543 MNTNAMLEN)) 1544 return (1); 1545 } 1546 hp = hp->ht_next; 1547 if (gotalldir && hp == (struct hostlist *)NULL) { 1548 hp = adp->dp_hosts; 1549 gotalldir = 0; 1550 } 1551 } 1552 } 1553 if (!xdr_bool(xdrsp, &false)) 1554 return (1); 1555 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1556 return (1); 1557 } 1558 return (0); 1559 } 1560 1561 static int 1562 xdr_explist(XDR *xdrsp, caddr_t cp) 1563 { 1564 1565 return xdr_explist_common(xdrsp, cp, 0); 1566 } 1567 1568 static int 1569 xdr_explist_brief(XDR *xdrsp, caddr_t cp) 1570 { 1571 1572 return xdr_explist_common(xdrsp, cp, 1); 1573 } 1574 1575 static char *line; 1576 static size_t linesize; 1577 static FILE *exp_file; 1578 1579 /* 1580 * Get the export list from one, currently open file 1581 */ 1582 static void 1583 get_exportlist_one(int passno) 1584 { 1585 struct exportlist *ep; 1586 struct grouplist *grp, *tgrp, *savgrp; 1587 struct dirlist *dirhead; 1588 struct statfs fsb; 1589 struct expcred anon; 1590 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1591 char *err_msg = NULL; 1592 int len, has_host, got_nondir, dirplen, netgrp; 1593 uint64_t exflags; 1594 char unvis_dir[PATH_MAX + 1]; 1595 int unvis_len; 1596 1597 v4root_phase = 0; 1598 dirhead = (struct dirlist *)NULL; 1599 unvis_dir[0] = '\0'; 1600 fsb.f_mntonname[0] = '\0'; 1601 1602 while (get_line()) { 1603 if (debug) 1604 warnx("got line %s", line); 1605 cp = line; 1606 nextfield(&cp, &endcp); 1607 if (*cp == '#') 1608 goto nextline; 1609 1610 /* 1611 * Set defaults. 1612 */ 1613 has_host = FALSE; 1614 anon.cr_uid = UID_NOBODY; 1615 anon.cr_ngroups = 1; 1616 anon.cr_groups = tmp_groups; 1617 anon.cr_groups[0] = nogroup(); 1618 exflags = MNT_EXPORTED; 1619 got_nondir = 0; 1620 opt_flags = 0; 1621 ep = (struct exportlist *)NULL; 1622 dirp = NULL; 1623 1624 /* 1625 * Handle the V4 root dir. 1626 */ 1627 if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') { 1628 /* 1629 * V4: just indicates that it is the v4 root point, 1630 * so skip over that and set v4root_phase. 1631 */ 1632 if (v4root_phase > 0) { 1633 syslog(LOG_ERR, "V4:duplicate line, ignored"); 1634 goto nextline; 1635 } 1636 v4root_phase = 1; 1637 cp += 3; 1638 nextfield(&cp, &endcp); 1639 } 1640 1641 /* 1642 * Create new exports list entry 1643 */ 1644 len = endcp-cp; 1645 tgrp = grp = get_grp(); 1646 while (len > 0) { 1647 if (len > MNTNAMLEN) { 1648 getexp_err(ep, tgrp, "mountpoint too long"); 1649 goto nextline; 1650 } 1651 if (*cp == '-') { 1652 if (ep == (struct exportlist *)NULL) { 1653 getexp_err(ep, tgrp, 1654 "flag before export path definition"); 1655 goto nextline; 1656 } 1657 if (debug) 1658 warnx("doing opt %s", cp); 1659 got_nondir = 1; 1660 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1661 &exflags, &anon, unvis_dir)) { 1662 getexp_err(ep, tgrp, NULL); 1663 goto nextline; 1664 } 1665 } else if (*cp == '/') { 1666 savedc = *endcp; 1667 *endcp = '\0'; 1668 unvis_len = strnunvis(unvis_dir, sizeof(unvis_dir), 1669 cp); 1670 if (unvis_len <= 0) { 1671 getexp_err(ep, tgrp, "Cannot strunvis " 1672 "decode dir"); 1673 goto nextline; 1674 } 1675 if (v4root_phase > 1) { 1676 if (dirp != NULL) { 1677 getexp_err(ep, tgrp, "Multiple V4 dirs"); 1678 goto nextline; 1679 } 1680 } 1681 if (check_dirpath(unvis_dir, &err_msg) && 1682 check_statfs(unvis_dir, &fsb, &err_msg)) { 1683 if ((fsb.f_flags & MNT_AUTOMOUNTED) != 0) 1684 syslog(LOG_ERR, "Warning: exporting of " 1685 "automounted fs %s not supported", 1686 unvis_dir); 1687 if (got_nondir) { 1688 getexp_err(ep, tgrp, "dirs must be first"); 1689 goto nextline; 1690 } 1691 if (v4root_phase == 1) { 1692 if (dirp != NULL) { 1693 getexp_err(ep, tgrp, "Multiple V4 dirs"); 1694 goto nextline; 1695 } 1696 if (strlen(v4root_dirpath) == 0) { 1697 strlcpy(v4root_dirpath, unvis_dir, 1698 sizeof (v4root_dirpath)); 1699 } else if (strcmp(v4root_dirpath, unvis_dir) 1700 != 0) { 1701 syslog(LOG_ERR, 1702 "different V4 dirpath %s", 1703 unvis_dir); 1704 getexp_err(ep, tgrp, NULL); 1705 goto nextline; 1706 } 1707 dirp = unvis_dir; 1708 v4root_phase = 2; 1709 got_nondir = 1; 1710 ep = get_exp(); 1711 } else { 1712 if (ep) { 1713 if (fsidcmp(&ep->ex_fs, &fsb.f_fsid) 1714 != 0) { 1715 getexp_err(ep, tgrp, 1716 "fsid mismatch"); 1717 goto nextline; 1718 } 1719 } else { 1720 /* 1721 * See if this directory is already 1722 * in the list. 1723 */ 1724 ep = ex_search(&fsb.f_fsid, exphead); 1725 if (ep == (struct exportlist *)NULL) { 1726 ep = get_exp(); 1727 ep->ex_fs = fsb.f_fsid; 1728 ep->ex_fsdir = strdup(fsb.f_mntonname); 1729 if (ep->ex_fsdir == NULL) 1730 out_of_mem(); 1731 if (debug) 1732 warnx( 1733 "making new ep fs=0x%x,0x%x", 1734 fsb.f_fsid.val[0], 1735 fsb.f_fsid.val[1]); 1736 } else if (debug) 1737 warnx("found ep fs=0x%x,0x%x", 1738 fsb.f_fsid.val[0], 1739 fsb.f_fsid.val[1]); 1740 } 1741 1742 if (strcmp(unvis_dir, fsb.f_mntonname) != 1743 0) 1744 opt_flags |= OP_NOTROOT; 1745 1746 /* 1747 * Add dirpath to export mount point. 1748 */ 1749 dirp = add_expdir(&dirhead, unvis_dir, 1750 unvis_len); 1751 dirplen = unvis_len; 1752 } 1753 } else { 1754 if (err_msg != NULL) { 1755 getexp_err(ep, tgrp, err_msg); 1756 free(err_msg); 1757 err_msg = NULL; 1758 } else { 1759 getexp_err(ep, tgrp, 1760 "symbolic link in export path or " 1761 "statfs failed"); 1762 } 1763 goto nextline; 1764 } 1765 *endcp = savedc; 1766 } else { 1767 savedc = *endcp; 1768 *endcp = '\0'; 1769 got_nondir = 1; 1770 if (ep == (struct exportlist *)NULL) { 1771 getexp_err(ep, tgrp, 1772 "host(s) before export path definition"); 1773 goto nextline; 1774 } 1775 1776 /* 1777 * Get the host or netgroup. 1778 */ 1779 setnetgrent(cp); 1780 netgrp = getnetgrent(&hst, &usr, &dom); 1781 do { 1782 if (has_host) { 1783 grp->gr_next = get_grp(); 1784 grp = grp->gr_next; 1785 } 1786 if (netgrp) { 1787 if (hst == 0) { 1788 syslog(LOG_ERR, 1789 "null hostname in netgroup %s, skipping", cp); 1790 grp->gr_type = GT_IGNORE; 1791 } else if (get_host(hst, grp, tgrp)) { 1792 syslog(LOG_ERR, 1793 "bad host %s in netgroup %s, skipping", hst, cp); 1794 grp->gr_type = GT_IGNORE; 1795 } 1796 } else if (get_host(cp, grp, tgrp)) { 1797 syslog(LOG_ERR, "bad host %s, skipping", cp); 1798 grp->gr_type = GT_IGNORE; 1799 } 1800 has_host = TRUE; 1801 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1802 endnetgrent(); 1803 *endcp = savedc; 1804 } 1805 cp = endcp; 1806 nextfield(&cp, &endcp); 1807 len = endcp - cp; 1808 } 1809 if (opt_flags & OP_CLASSMASK) 1810 syslog(LOG_ERR, 1811 "WARNING: No mask specified for %s, " 1812 "using out-of-date default", 1813 (&grp->gr_ptr.gt_net)->nt_name); 1814 if ((opt_flags & OP_NOTROOT) != 0 && warn_admin != 0 && 1815 (ep->ex_flag & EX_ADMINWARN) == 0 && unvis_dir[0] != '\0' && 1816 fsb.f_mntonname[0] != '\0') { 1817 if (debug) 1818 warnx("exporting %s exports entire %s file " 1819 "system", unvis_dir, fsb.f_mntonname); 1820 syslog(LOG_ERR, "Warning: exporting %s exports " 1821 "entire %s file system", unvis_dir, 1822 fsb.f_mntonname); 1823 ep->ex_flag |= EX_ADMINWARN; 1824 } 1825 if (check_options(dirhead)) { 1826 getexp_err(ep, tgrp, NULL); 1827 goto nextline; 1828 } 1829 if (!has_host) { 1830 grp->gr_type = GT_DEFAULT; 1831 if (debug) 1832 warnx("adding a default entry"); 1833 1834 /* 1835 * Don't allow a network export coincide with a list of 1836 * host(s) on the same line. 1837 */ 1838 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1839 getexp_err(ep, tgrp, "network/host conflict"); 1840 goto nextline; 1841 1842 /* 1843 * If an export list was specified on this line, make sure 1844 * that we have at least one valid entry, otherwise skip it. 1845 */ 1846 } else { 1847 grp = tgrp; 1848 while (grp && grp->gr_type == GT_IGNORE) 1849 grp = grp->gr_next; 1850 if (! grp) { 1851 getexp_err(ep, tgrp, "no valid entries"); 1852 goto nextline; 1853 } 1854 } 1855 1856 if (v4root_phase == 1) { 1857 getexp_err(ep, tgrp, "V4:root, no dirp, ignored"); 1858 goto nextline; 1859 } 1860 1861 /* 1862 * Loop through hosts, pushing the exports into the kernel. 1863 * After loop, tgrp points to the start of the list and 1864 * grp points to the last entry in the list. 1865 * Do not do the do_mount() for passno == 1, since the 1866 * second pass will do it, as required. 1867 */ 1868 grp = tgrp; 1869 do { 1870 grp->gr_exflags = exflags; 1871 cp_cred(&grp->gr_anon, &anon); 1872 if (v4root_phase == 2 && passno == 0) 1873 LOGDEBUG("do_mount v4root"); 1874 if (passno == 0 && do_mount(ep, grp, exflags, &anon, 1875 dirp, dirplen, &fsb, ep->ex_numsecflavors, 1876 ep->ex_secflavors)) { 1877 getexp_err(ep, tgrp, NULL); 1878 goto nextline; 1879 } 1880 } while (grp->gr_next && (grp = grp->gr_next)); 1881 1882 /* 1883 * For V4: don't enter in mount lists. 1884 */ 1885 if (v4root_phase > 0 && v4root_phase <= 2) { 1886 /* 1887 * These structures are used for the reload, 1888 * so save them for that case. Otherwise, just 1889 * free them up now. 1890 */ 1891 if (passno == 1 && ep != NULL) { 1892 savgrp = tgrp; 1893 while (tgrp != NULL) { 1894 /* 1895 * Save the security flavors and exflags 1896 * for this host set in the groups. 1897 */ 1898 tgrp->gr_numsecflavors = 1899 ep->ex_numsecflavors; 1900 if (ep->ex_numsecflavors > 0) 1901 memcpy(tgrp->gr_secflavors, 1902 ep->ex_secflavors, 1903 sizeof(ep->ex_secflavors)); 1904 tgrp = tgrp->gr_next; 1905 } 1906 if (v4root_ep == NULL) { 1907 v4root_ep = ep; 1908 ep = NULL; /* Don't free below. */ 1909 } 1910 grp->gr_next = v4root_ep->ex_grphead; 1911 v4root_ep->ex_grphead = savgrp; 1912 } 1913 if (ep != NULL) 1914 free_exp(ep); 1915 while (tgrp != NULL) { 1916 grp = tgrp; 1917 tgrp = tgrp->gr_next; 1918 free_grp(grp); 1919 } 1920 goto nextline; 1921 } 1922 1923 /* 1924 * Success. Update the data structures. 1925 */ 1926 if (has_host) { 1927 hang_dirp(dirhead, tgrp, ep, opt_flags, &anon, exflags); 1928 grp->gr_next = ep->ex_grphead; 1929 ep->ex_grphead = tgrp; 1930 } else { 1931 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1932 opt_flags, &anon, exflags); 1933 free_grp(grp); 1934 } 1935 dirhead = (struct dirlist *)NULL; 1936 if ((ep->ex_flag & EX_LINKED) == 0) { 1937 insert_exports(ep, exphead); 1938 1939 ep->ex_flag |= EX_LINKED; 1940 } 1941 nextline: 1942 v4root_phase = 0; 1943 if (dirhead) { 1944 free_dir(dirhead); 1945 dirhead = (struct dirlist *)NULL; 1946 } 1947 } 1948 } 1949 1950 /* 1951 * Get the export list from all specified files 1952 */ 1953 static void 1954 get_exportlist(int passno) 1955 { 1956 struct export_args export; 1957 struct iovec *iov; 1958 struct statfs *mntbufp; 1959 char errmsg[255]; 1960 int error, i, nfs_maxvers, num; 1961 int iovlen; 1962 struct nfsex_args eargs; 1963 FILE *debug_file; 1964 size_t nfs_maxvers_size; 1965 1966 if ((debug_file = fopen(_PATH_MOUNTDDEBUG, "r")) != NULL) { 1967 fclose(debug_file); 1968 logdebug = 1; 1969 } else 1970 logdebug = 0; 1971 LOGDEBUG("passno=%d", passno); 1972 v4root_dirpath[0] = '\0'; 1973 free_v4rootexp(); 1974 if (passno == 1) { 1975 /* 1976 * Save the current lists as old ones, so that the new lists 1977 * can be compared with the old ones in the 2nd pass. 1978 */ 1979 for (i = 0; i < exphashsize; i++) { 1980 SLIST_FIRST(&oldexphead[i]) = SLIST_FIRST(&exphead[i]); 1981 SLIST_INIT(&exphead[i]); 1982 } 1983 1984 /* Note that the public fh has not yet been set. */ 1985 has_set_publicfh = 0; 1986 1987 /* Read the export file(s) and process them */ 1988 read_exportfile(passno); 1989 } else { 1990 /* 1991 * Just make the old lists empty. 1992 * exphashsize == 0 for the first call, before oldexphead 1993 * has been initialized-->loop won't be executed. 1994 */ 1995 for (i = 0; i < exphashsize; i++) 1996 SLIST_INIT(&oldexphead[i]); 1997 } 1998 1999 bzero(&export, sizeof(export)); 2000 export.ex_flags = MNT_DELEXPORT; 2001 iov = NULL; 2002 iovlen = 0; 2003 bzero(errmsg, sizeof(errmsg)); 2004 2005 if (suspend_nfsd != 0) 2006 (void)nfssvc(NFSSVC_SUSPENDNFSD, NULL); 2007 /* 2008 * Delete the old V4 root dir. 2009 */ 2010 bzero(&eargs, sizeof (eargs)); 2011 eargs.export.ex_flags = MNT_DELEXPORT; 2012 if (nfssvc(NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT, (caddr_t)&eargs) < 0 && 2013 errno != ENOENT) 2014 syslog(LOG_ERR, "Can't delete exports for V4:"); 2015 2016 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2017 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2018 build_iovec(&iov, &iovlen, "from", NULL, 0); 2019 build_iovec(&iov, &iovlen, "update", NULL, 0); 2020 build_iovec(&iov, &iovlen, "export", &export, 2021 sizeof(export)); 2022 build_iovec(&iov, &iovlen, "errmsg", errmsg, 2023 sizeof(errmsg)); 2024 2025 /* 2026 * For passno == 1, compare the old and new lists updating the kernel 2027 * exports for any cases that have changed. 2028 * This call is doing the second pass through the lists. 2029 * If it fails, fall back on the bulk reload. 2030 */ 2031 if (passno == 1 && compare_nmount_exportlist(iov, iovlen, errmsg) == 2032 0) { 2033 LOGDEBUG("compareok"); 2034 /* Free up the old lists. */ 2035 free_exports(oldexphead); 2036 } else { 2037 LOGDEBUG("doing passno=0"); 2038 /* 2039 * Clear flag that notes if a public fh has been exported. 2040 * It is set by do_mount() if MNT_EXPUBLIC is set for the entry. 2041 */ 2042 has_publicfh = 0; 2043 2044 /* exphead == NULL if not yet allocated (first call). */ 2045 if (exphead != NULL) { 2046 /* 2047 * First, get rid of the old lists. 2048 */ 2049 free_exports(exphead); 2050 free_exports(oldexphead); 2051 } 2052 2053 /* 2054 * And delete exports that are in the kernel for all local 2055 * filesystems. 2056 * XXX: Should know how to handle all local exportable 2057 * filesystems. 2058 */ 2059 num = getmntinfo(&mntbufp, MNT_NOWAIT); 2060 2061 /* Allocate hash tables, for first call. */ 2062 if (exphead == NULL) { 2063 /* Target an average linked list length of 10. */ 2064 exphashsize = num / 10; 2065 if (exphashsize < 1) 2066 exphashsize = 1; 2067 else if (exphashsize > 100000) 2068 exphashsize = 100000; 2069 exphead = malloc(exphashsize * sizeof(*exphead)); 2070 oldexphead = malloc(exphashsize * sizeof(*oldexphead)); 2071 if (exphead == NULL || oldexphead == NULL) 2072 errx(1, "Can't malloc hash tables"); 2073 2074 for (i = 0; i < exphashsize; i++) { 2075 SLIST_INIT(&exphead[i]); 2076 SLIST_INIT(&oldexphead[i]); 2077 } 2078 } 2079 2080 for (i = 0; i < num; i++) 2081 delete_export(iov, iovlen, &mntbufp[i], errmsg); 2082 2083 2084 /* Read the export file(s) and process them */ 2085 read_exportfile(0); 2086 } 2087 2088 if (strlen(v4root_dirpath) == 0) { 2089 /* Check to see if a V4: line is needed. */ 2090 nfs_maxvers_size = sizeof(nfs_maxvers); 2091 error = sysctlbyname("vfs.nfsd.server_max_nfsvers", 2092 &nfs_maxvers, &nfs_maxvers_size, NULL, 0); 2093 if (error != 0 || nfs_maxvers < NFS_VER2 || nfs_maxvers > 2094 NFS_VER4) { 2095 syslog(LOG_ERR, "sysctlbyname(vfs.nfsd." 2096 "server_max_nfsvers) failed, defaulting to NFSv3"); 2097 nfs_maxvers = NFS_VER3; 2098 } 2099 if (nfs_maxvers == NFS_VER4) 2100 syslog(LOG_ERR, "NFSv4 requires at least one V4: line"); 2101 } 2102 2103 free_iovec(&iov, &iovlen); 2104 2105 /* 2106 * If there was no public fh, clear any previous one set. 2107 */ 2108 if (has_publicfh == 0) { 2109 LOGDEBUG("clear public fh"); 2110 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 2111 } 2112 2113 /* Resume the nfsd. If they weren't suspended, this is harmless. */ 2114 (void)nfssvc(NFSSVC_RESUMENFSD, NULL); 2115 LOGDEBUG("eo get_exportlist"); 2116 } 2117 2118 /* 2119 * Insert an export entry in the appropriate list. 2120 */ 2121 static void 2122 insert_exports(struct exportlist *ep, struct exportlisthead *exhp) 2123 { 2124 uint32_t i; 2125 2126 i = EXPHASH(&ep->ex_fs); 2127 LOGDEBUG("fs=%s hash=%i", ep->ex_fsdir, i); 2128 SLIST_INSERT_HEAD(&exhp[i], ep, entries); 2129 } 2130 2131 /* 2132 * Free up the exports lists passed in as arguments. 2133 */ 2134 static void 2135 free_exports(struct exportlisthead *exhp) 2136 { 2137 struct exportlist *ep, *ep2; 2138 int i; 2139 2140 for (i = 0; i < exphashsize; i++) { 2141 SLIST_FOREACH_SAFE(ep, &exhp[i], entries, ep2) { 2142 SLIST_REMOVE(&exhp[i], ep, exportlist, entries); 2143 free_exp(ep); 2144 } 2145 SLIST_INIT(&exhp[i]); 2146 } 2147 } 2148 2149 /* 2150 * Read the exports file(s) and call get_exportlist_one() for each line. 2151 */ 2152 static void 2153 read_exportfile(int passno) 2154 { 2155 int done, i; 2156 2157 /* 2158 * Read in the exports file and build the list, calling 2159 * nmount() as we go along to push the export rules into the kernel. 2160 */ 2161 done = 0; 2162 for (i = 0; exnames[i] != NULL; i++) { 2163 if (debug) 2164 warnx("reading exports from %s", exnames[i]); 2165 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 2166 syslog(LOG_WARNING, "can't open %s", exnames[i]); 2167 continue; 2168 } 2169 get_exportlist_one(passno); 2170 fclose(exp_file); 2171 done++; 2172 } 2173 if (done == 0) { 2174 syslog(LOG_ERR, "can't open any exports file"); 2175 exit(2); 2176 } 2177 } 2178 2179 /* 2180 * Compare the export lists against the old ones and do nmount() operations 2181 * for any cases that have changed. This avoids doing nmount() for entries 2182 * that have not changed. 2183 * Return 0 upon success, 1 otherwise. 2184 */ 2185 static int 2186 compare_nmount_exportlist(struct iovec *iov, int iovlen, char *errmsg) 2187 { 2188 struct exportlist *ep, *oep; 2189 struct grouplist *grp; 2190 struct statfs fs, ofs; 2191 int i, ret; 2192 2193 /* 2194 * Loop through the current list and look for an entry in the old 2195 * list. 2196 * If found, check to see if it the same. 2197 * If it is not the same, delete and re-export. 2198 * Then mark it done on the old list. 2199 * else (not found) 2200 * export it. 2201 * Any entries left in the old list after processing must have their 2202 * exports deleted. 2203 */ 2204 for (i = 0; i < exphashsize; i++) 2205 SLIST_FOREACH(ep, &exphead[i], entries) { 2206 LOGDEBUG("foreach ep=%s", ep->ex_fsdir); 2207 oep = ex_search(&ep->ex_fs, oldexphead); 2208 if (oep != NULL) { 2209 /* 2210 * Check the mount paths are the same. 2211 * If not, return 1 so that the reload of the 2212 * exports will be done in bulk, the 2213 * passno == 0 way. 2214 */ 2215 LOGDEBUG("found old exp"); 2216 if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0) 2217 return (1); 2218 LOGDEBUG("same fsdir"); 2219 /* 2220 * Test to see if the entry is the same. 2221 * If not the same delete exports and 2222 * re-export. 2223 */ 2224 if (compare_export(ep, oep) != 0) { 2225 /* 2226 * Clear has_publicfh if if was set 2227 * in the old exports, but only if it 2228 * has not been set during processing of 2229 * the exports for this pass, as 2230 * indicated by has_set_publicfh. 2231 */ 2232 if (has_set_publicfh == 0 && 2233 (oep->ex_flag & EX_PUBLICFH) != 0) 2234 has_publicfh = 0; 2235 2236 /* Delete and re-export. */ 2237 if (statfs(ep->ex_fsdir, &fs) < 0) 2238 return (1); 2239 delete_export(iov, iovlen, &fs, errmsg); 2240 ret = do_export_mount(ep, &fs); 2241 if (ret != 0) 2242 return (ret); 2243 } 2244 oep->ex_flag |= EX_DONE; 2245 LOGDEBUG("exdone"); 2246 } else { 2247 LOGDEBUG("not found so export"); 2248 /* Not found, so do export. */ 2249 if (statfs(ep->ex_fsdir, &fs) < 0) 2250 return (1); 2251 ret = do_export_mount(ep, &fs); 2252 if (ret != 0) 2253 return (ret); 2254 } 2255 } 2256 2257 /* Delete exports not done. */ 2258 for (i = 0; i < exphashsize; i++) 2259 SLIST_FOREACH(oep, &oldexphead[i], entries) { 2260 if ((oep->ex_flag & EX_DONE) == 0) { 2261 LOGDEBUG("not done delete=%s", oep->ex_fsdir); 2262 if (statfs(oep->ex_fsdir, &ofs) >= 0 && 2263 fsidcmp(&oep->ex_fs, &ofs.f_fsid) == 0) { 2264 LOGDEBUG("do delete"); 2265 /* 2266 * Clear has_publicfh if if was set 2267 * in the old exports, but only if it 2268 * has not been set during processing of 2269 * the exports for this pass, as 2270 * indicated by has_set_publicfh. 2271 */ 2272 if (has_set_publicfh == 0 && 2273 (oep->ex_flag & EX_PUBLICFH) != 0) 2274 has_publicfh = 0; 2275 2276 delete_export(iov, iovlen, &ofs, 2277 errmsg); 2278 } 2279 } 2280 } 2281 2282 /* Do the V4 root exports, as required. */ 2283 grp = NULL; 2284 if (v4root_ep != NULL) 2285 grp = v4root_ep->ex_grphead; 2286 v4root_phase = 2; 2287 while (v4root_ep != NULL && grp != NULL) { 2288 LOGDEBUG("v4root expath=%s", v4root_dirpath); 2289 ret = do_mount(v4root_ep, grp, grp->gr_exflags, &grp->gr_anon, 2290 v4root_dirpath, strlen(v4root_dirpath), &fs, 2291 grp->gr_numsecflavors, grp->gr_secflavors); 2292 if (ret != 0) { 2293 v4root_phase = 0; 2294 return (ret); 2295 } 2296 grp = grp->gr_next; 2297 } 2298 v4root_phase = 0; 2299 free_v4rootexp(); 2300 return (0); 2301 } 2302 2303 /* 2304 * Compare old and current exportlist entries for the fsid and return 0 2305 * if they are the same, 1 otherwise. 2306 */ 2307 static int 2308 compare_export(struct exportlist *ep, struct exportlist *oep) 2309 { 2310 struct grouplist *grp, *ogrp; 2311 2312 if (strcmp(ep->ex_fsdir, oep->ex_fsdir) != 0) 2313 return (1); 2314 if ((ep->ex_flag & EX_DEFSET) != (oep->ex_flag & EX_DEFSET)) 2315 return (1); 2316 if ((ep->ex_defdir != NULL && oep->ex_defdir == NULL) || 2317 (ep->ex_defdir == NULL && oep->ex_defdir != NULL)) 2318 return (1); 2319 if (ep->ex_defdir != NULL && (ep->ex_defdir->dp_flag & DP_DEFSET) != 2320 (oep->ex_defdir->dp_flag & DP_DEFSET)) 2321 return (1); 2322 if ((ep->ex_flag & EX_DEFSET) != 0 && (ep->ex_defnumsecflavors != 2323 oep->ex_defnumsecflavors || ep->ex_defexflags != 2324 oep->ex_defexflags || compare_cred(&ep->ex_defanon, 2325 &oep->ex_defanon) != 0 || compare_secflavor(ep->ex_defsecflavors, 2326 oep->ex_defsecflavors, ep->ex_defnumsecflavors) != 0)) 2327 return (1); 2328 2329 /* Now, check all the groups. */ 2330 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next) 2331 ogrp->gr_flag = 0; 2332 for (grp = ep->ex_grphead; grp != NULL; grp = grp->gr_next) { 2333 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = 2334 ogrp->gr_next) 2335 if ((ogrp->gr_flag & GR_FND) == 0 && 2336 grp->gr_numsecflavors == ogrp->gr_numsecflavors && 2337 grp->gr_exflags == ogrp->gr_exflags && 2338 compare_cred(&grp->gr_anon, &ogrp->gr_anon) == 0 && 2339 compare_secflavor(grp->gr_secflavors, 2340 ogrp->gr_secflavors, grp->gr_numsecflavors) == 0 && 2341 compare_addr(grp, ogrp) == 0) 2342 break; 2343 if (ogrp != NULL) 2344 ogrp->gr_flag |= GR_FND; 2345 else 2346 return (1); 2347 } 2348 for (ogrp = oep->ex_grphead; ogrp != NULL; ogrp = ogrp->gr_next) 2349 if ((ogrp->gr_flag & GR_FND) == 0) 2350 return (1); 2351 return (0); 2352 } 2353 2354 /* 2355 * Compare the addresses in the group. It is safe to return they are not 2356 * the same when the are, so only return they are the same when they are 2357 * exactly the same. 2358 */ 2359 static int 2360 compare_addr(struct grouplist *grp, struct grouplist *ogrp) 2361 { 2362 struct addrinfo *ai, *oai; 2363 2364 if (grp->gr_type != ogrp->gr_type) 2365 return (1); 2366 switch (grp->gr_type) { 2367 case GT_HOST: 2368 ai = grp->gr_ptr.gt_addrinfo; 2369 oai = ogrp->gr_ptr.gt_addrinfo; 2370 for (; ai != NULL && oai != NULL; ai = ai->ai_next, 2371 oai = oai->ai_next) { 2372 if (sacmp(ai->ai_addr, oai->ai_addr, NULL) != 0) 2373 return (1); 2374 } 2375 if (ai != NULL || oai != NULL) 2376 return (1); 2377 break; 2378 case GT_NET: 2379 /* First compare the masks and then the nets. */ 2380 if (sacmp((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask, 2381 (struct sockaddr *)&ogrp->gr_ptr.gt_net.nt_mask, NULL) != 0) 2382 return (1); 2383 if (sacmp((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net, 2384 (struct sockaddr *)&ogrp->gr_ptr.gt_net.nt_net, 2385 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask) != 0) 2386 return (1); 2387 break; 2388 default: 2389 return (1); 2390 } 2391 return (0); 2392 } 2393 2394 /* 2395 * This algorithm compares two arrays of "n" items. It returns 0 if they are 2396 * the "same" and 1 otherwise. Although suboptimal, it is always safe to 2397 * return 1, which makes compare_nmount_export() reload the exports entry. 2398 * "same" refers to having the same set of values in the two arrays. 2399 * The arrays are in no particular order and duplicates (multiple entries 2400 * in an array with the same value) is allowed. 2401 * The algorithm is inefficient, but the common case of identical arrays is 2402 * handled first and "n" is normally fairly small. 2403 * Since the two functions need the same algorithm but for arrays of 2404 * different types (gid_t vs int), this is done as a macro. 2405 */ 2406 #define COMPARE_ARRAYS(a1, a2, n) \ 2407 do { \ 2408 int fnd, fndarray[(n)], i, j; \ 2409 /* Handle common case of identical arrays. */ \ 2410 for (i = 0; i < (n); i++) \ 2411 if ((a1)[i] != (a2)[i]) \ 2412 break; \ 2413 if (i == (n)) \ 2414 return (0); \ 2415 for (i = 0; i < (n); i++) \ 2416 fndarray[i] = 0; \ 2417 for (i = 0; i < (n); i++) { \ 2418 fnd = 0; \ 2419 for (j = 0; j < (n); j++) { \ 2420 if ((a1)[i] == (a2)[j]) { \ 2421 fndarray[j] = 1; \ 2422 fnd = 1; \ 2423 } \ 2424 } \ 2425 if (fnd == 0) \ 2426 return (1); \ 2427 } \ 2428 for (i = 0; i < (n); i++) \ 2429 if (fndarray[i] == 0) \ 2430 return (1); \ 2431 return (0); \ 2432 } while (0) 2433 2434 /* 2435 * Compare two struct expcred's. Return 0 if the same and 1 otherwise. 2436 */ 2437 static int 2438 compare_cred(struct expcred *cr0, struct expcred *cr1) 2439 { 2440 2441 if (cr0->cr_uid != cr1->cr_uid || cr0->cr_ngroups != cr1->cr_ngroups) 2442 return (1); 2443 2444 COMPARE_ARRAYS(cr0->cr_groups, cr1->cr_groups, cr0->cr_ngroups); 2445 } 2446 2447 /* 2448 * Compare two lists of security flavors. Return 0 if the same and 1 otherwise. 2449 */ 2450 static int 2451 compare_secflavor(int *sec1, int *sec2, int nsec) 2452 { 2453 2454 COMPARE_ARRAYS(sec1, sec2, nsec); 2455 } 2456 2457 /* 2458 * Delete an exports entry. 2459 */ 2460 static void 2461 delete_export(struct iovec *iov, int iovlen, struct statfs *fsp, char *errmsg) 2462 { 2463 struct xvfsconf vfc; 2464 2465 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 2466 syslog(LOG_ERR, "getvfsbyname() failed for %s", 2467 fsp->f_fstypename); 2468 return; 2469 } 2470 2471 /* 2472 * We do not need to delete "export" flag from 2473 * filesystems that do not have it set. 2474 */ 2475 if (!(fsp->f_flags & MNT_EXPORTED)) 2476 return; 2477 /* 2478 * Do not delete export for network filesystem by 2479 * passing "export" arg to nmount(). 2480 * It only makes sense to do this for local filesystems. 2481 */ 2482 if (vfc.vfc_flags & VFCF_NETWORK) 2483 return; 2484 2485 iov[1].iov_base = fsp->f_fstypename; 2486 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 2487 iov[3].iov_base = fsp->f_mntonname; 2488 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 2489 iov[5].iov_base = fsp->f_mntfromname; 2490 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 2491 errmsg[0] = '\0'; 2492 2493 /* 2494 * EXDEV is returned when path exists but is not a 2495 * mount point. May happens if raced with unmount. 2496 */ 2497 if (nmount(iov, iovlen, fsp->f_flags) < 0 && errno != ENOENT && 2498 errno != ENOTSUP && errno != EXDEV) { 2499 syslog(LOG_ERR, 2500 "can't delete exports for %s: %m %s", 2501 fsp->f_mntonname, errmsg); 2502 } 2503 } 2504 2505 /* 2506 * Allocate an export list element 2507 */ 2508 static struct exportlist * 2509 get_exp(void) 2510 { 2511 struct exportlist *ep; 2512 2513 ep = (struct exportlist *)calloc(1, sizeof (struct exportlist)); 2514 if (ep == (struct exportlist *)NULL) 2515 out_of_mem(); 2516 return (ep); 2517 } 2518 2519 /* 2520 * Allocate a group list element 2521 */ 2522 static struct grouplist * 2523 get_grp(void) 2524 { 2525 struct grouplist *gp; 2526 2527 gp = (struct grouplist *)calloc(1, sizeof (struct grouplist)); 2528 if (gp == (struct grouplist *)NULL) 2529 out_of_mem(); 2530 return (gp); 2531 } 2532 2533 /* 2534 * Clean up upon an error in get_exportlist(). 2535 */ 2536 static void 2537 getexp_err(struct exportlist *ep, struct grouplist *grp, const char *reason) 2538 { 2539 struct grouplist *tgrp; 2540 2541 if (!(opt_flags & OP_QUIET)) { 2542 if (reason != NULL) 2543 syslog(LOG_ERR, "bad exports list line '%s': %s", line, 2544 reason); 2545 else 2546 syslog(LOG_ERR, "bad exports list line '%s'", line); 2547 } 2548 if (ep && (ep->ex_flag & EX_LINKED) == 0) 2549 free_exp(ep); 2550 while (grp) { 2551 tgrp = grp; 2552 grp = grp->gr_next; 2553 free_grp(tgrp); 2554 } 2555 } 2556 2557 /* 2558 * Search the export list for a matching fs. 2559 */ 2560 static struct exportlist * 2561 ex_search(fsid_t *fsid, struct exportlisthead *exhp) 2562 { 2563 struct exportlist *ep; 2564 uint32_t i; 2565 2566 i = EXPHASH(fsid); 2567 SLIST_FOREACH(ep, &exhp[i], entries) { 2568 if (fsidcmp(&ep->ex_fs, fsid) == 0) 2569 return (ep); 2570 } 2571 2572 return (ep); 2573 } 2574 2575 /* 2576 * Add a directory path to the list. 2577 */ 2578 static char * 2579 add_expdir(struct dirlist **dpp, char *cp, int len) 2580 { 2581 struct dirlist *dp; 2582 2583 dp = malloc(sizeof (struct dirlist)); 2584 if (dp == (struct dirlist *)NULL) 2585 out_of_mem(); 2586 dp->dp_left = *dpp; 2587 dp->dp_right = (struct dirlist *)NULL; 2588 dp->dp_flag = 0; 2589 dp->dp_hosts = (struct hostlist *)NULL; 2590 dp->dp_dirp = strndup(cp, len); 2591 if (dp->dp_dirp == NULL) 2592 out_of_mem(); 2593 *dpp = dp; 2594 return (dp->dp_dirp); 2595 } 2596 2597 /* 2598 * Hang the dir list element off the dirpath binary tree as required 2599 * and update the entry for host. 2600 */ 2601 static void 2602 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 2603 int flags, struct expcred *anoncrp, uint64_t exflags) 2604 { 2605 struct hostlist *hp; 2606 struct dirlist *dp2; 2607 2608 if (flags & OP_ALLDIRS) { 2609 if (ep->ex_defdir) 2610 free((caddr_t)dp); 2611 else 2612 ep->ex_defdir = dp; 2613 if (grp == (struct grouplist *)NULL) { 2614 ep->ex_flag |= EX_DEFSET; 2615 ep->ex_defdir->dp_flag |= DP_DEFSET; 2616 /* Save the default security flavors list. */ 2617 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2618 if (ep->ex_numsecflavors > 0) 2619 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2620 sizeof(ep->ex_secflavors)); 2621 cp_cred(&ep->ex_defanon, anoncrp); 2622 ep->ex_defexflags = exflags; 2623 } else while (grp) { 2624 hp = get_ht(); 2625 hp->ht_grp = grp; 2626 hp->ht_next = ep->ex_defdir->dp_hosts; 2627 ep->ex_defdir->dp_hosts = hp; 2628 /* Save the security flavors list for this host set. */ 2629 grp->gr_numsecflavors = ep->ex_numsecflavors; 2630 if (ep->ex_numsecflavors > 0) 2631 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2632 sizeof(ep->ex_secflavors)); 2633 grp = grp->gr_next; 2634 } 2635 } else { 2636 2637 /* 2638 * Loop through the directories adding them to the tree. 2639 */ 2640 while (dp) { 2641 dp2 = dp->dp_left; 2642 add_dlist(&ep->ex_dirl, dp, grp, flags, ep, anoncrp, 2643 exflags); 2644 dp = dp2; 2645 } 2646 } 2647 } 2648 2649 /* 2650 * Traverse the binary tree either updating a node that is already there 2651 * for the new directory or adding the new node. 2652 */ 2653 static void 2654 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 2655 int flags, struct exportlist *ep, struct expcred *anoncrp, 2656 uint64_t exflags) 2657 { 2658 struct dirlist *dp; 2659 struct hostlist *hp; 2660 int cmp; 2661 2662 dp = *dpp; 2663 if (dp) { 2664 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 2665 if (cmp > 0) { 2666 add_dlist(&dp->dp_left, newdp, grp, flags, ep, anoncrp, 2667 exflags); 2668 return; 2669 } else if (cmp < 0) { 2670 add_dlist(&dp->dp_right, newdp, grp, flags, ep, anoncrp, 2671 exflags); 2672 return; 2673 } else 2674 free((caddr_t)newdp); 2675 } else { 2676 dp = newdp; 2677 dp->dp_left = (struct dirlist *)NULL; 2678 *dpp = dp; 2679 } 2680 if (grp) { 2681 2682 /* 2683 * Hang all of the host(s) off of the directory point. 2684 */ 2685 do { 2686 hp = get_ht(); 2687 hp->ht_grp = grp; 2688 hp->ht_next = dp->dp_hosts; 2689 dp->dp_hosts = hp; 2690 /* Save the security flavors list for this host set. */ 2691 grp->gr_numsecflavors = ep->ex_numsecflavors; 2692 if (ep->ex_numsecflavors > 0) 2693 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2694 sizeof(ep->ex_secflavors)); 2695 grp = grp->gr_next; 2696 } while (grp); 2697 } else { 2698 ep->ex_flag |= EX_DEFSET; 2699 dp->dp_flag |= DP_DEFSET; 2700 /* Save the default security flavors list. */ 2701 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2702 if (ep->ex_numsecflavors > 0) 2703 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2704 sizeof(ep->ex_secflavors)); 2705 cp_cred(&ep->ex_defanon, anoncrp); 2706 ep->ex_defexflags = exflags; 2707 } 2708 } 2709 2710 /* 2711 * Search for a dirpath on the export point. 2712 */ 2713 static struct dirlist * 2714 dirp_search(struct dirlist *dp, char *dirp) 2715 { 2716 int cmp; 2717 2718 if (dp) { 2719 cmp = strcmp(dp->dp_dirp, dirp); 2720 if (cmp > 0) 2721 return (dirp_search(dp->dp_left, dirp)); 2722 else if (cmp < 0) 2723 return (dirp_search(dp->dp_right, dirp)); 2724 else 2725 return (dp); 2726 } 2727 return (dp); 2728 } 2729 2730 /* 2731 * Scan for a host match in a directory tree. 2732 */ 2733 static int 2734 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 2735 int *hostsetp, int *numsecflavors, int **secflavorsp) 2736 { 2737 struct hostlist *hp; 2738 struct grouplist *grp; 2739 struct addrinfo *ai; 2740 2741 if (dp) { 2742 if (dp->dp_flag & DP_DEFSET) 2743 *defsetp = dp->dp_flag; 2744 hp = dp->dp_hosts; 2745 while (hp) { 2746 grp = hp->ht_grp; 2747 switch (grp->gr_type) { 2748 case GT_HOST: 2749 ai = grp->gr_ptr.gt_addrinfo; 2750 for (; ai; ai = ai->ai_next) { 2751 if (!sacmp(ai->ai_addr, saddr, NULL)) { 2752 *hostsetp = 2753 (hp->ht_flag | DP_HOSTSET); 2754 if (numsecflavors != NULL) { 2755 *numsecflavors = 2756 grp->gr_numsecflavors; 2757 *secflavorsp = 2758 grp->gr_secflavors; 2759 } 2760 return (1); 2761 } 2762 } 2763 break; 2764 case GT_NET: 2765 if (!sacmp(saddr, (struct sockaddr *) 2766 &grp->gr_ptr.gt_net.nt_net, 2767 (struct sockaddr *) 2768 &grp->gr_ptr.gt_net.nt_mask)) { 2769 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2770 if (numsecflavors != NULL) { 2771 *numsecflavors = 2772 grp->gr_numsecflavors; 2773 *secflavorsp = 2774 grp->gr_secflavors; 2775 } 2776 return (1); 2777 } 2778 break; 2779 } 2780 hp = hp->ht_next; 2781 } 2782 } 2783 return (0); 2784 } 2785 2786 /* 2787 * Scan tree for a host that matches the address. 2788 */ 2789 static int 2790 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2791 { 2792 int defset, hostset; 2793 2794 if (dp) { 2795 if (scan_tree(dp->dp_left, saddr)) 2796 return (1); 2797 if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL)) 2798 return (1); 2799 if (scan_tree(dp->dp_right, saddr)) 2800 return (1); 2801 } 2802 return (0); 2803 } 2804 2805 /* 2806 * Traverse the dirlist tree and free it up. 2807 */ 2808 static void 2809 free_dir(struct dirlist *dp) 2810 { 2811 2812 if (dp) { 2813 free_dir(dp->dp_left); 2814 free_dir(dp->dp_right); 2815 free_host(dp->dp_hosts); 2816 free(dp->dp_dirp); 2817 free(dp); 2818 } 2819 } 2820 2821 /* 2822 * Parse a colon separated list of security flavors 2823 */ 2824 static int 2825 parsesec(char *seclist, struct exportlist *ep) 2826 { 2827 char *cp, savedc; 2828 int flavor; 2829 2830 ep->ex_numsecflavors = 0; 2831 for (;;) { 2832 cp = strchr(seclist, ':'); 2833 if (cp) { 2834 savedc = *cp; 2835 *cp = '\0'; 2836 } 2837 2838 if (!strcmp(seclist, "sys")) 2839 flavor = AUTH_SYS; 2840 else if (!strcmp(seclist, "krb5")) 2841 flavor = RPCSEC_GSS_KRB5; 2842 else if (!strcmp(seclist, "krb5i")) 2843 flavor = RPCSEC_GSS_KRB5I; 2844 else if (!strcmp(seclist, "krb5p")) 2845 flavor = RPCSEC_GSS_KRB5P; 2846 else { 2847 if (cp) 2848 *cp = savedc; 2849 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2850 return (1); 2851 } 2852 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2853 if (cp) 2854 *cp = savedc; 2855 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2856 return (1); 2857 } 2858 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2859 ep->ex_numsecflavors++; 2860 if (cp) { 2861 *cp = savedc; 2862 seclist = cp + 1; 2863 } else { 2864 break; 2865 } 2866 } 2867 return (0); 2868 } 2869 2870 /* 2871 * Parse the option string and update fields. 2872 * Option arguments may either be -<option>=<value> or 2873 * -<option> <value> 2874 */ 2875 static int 2876 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2877 int *has_hostp, uint64_t *exflagsp, struct expcred *cr, char *unvis_dir) 2878 { 2879 char *cpoptarg, *cpoptend; 2880 char *cp, *endcp, *cpopt, savedc, savedc2; 2881 int allflag, usedarg, fnd_equal; 2882 2883 savedc2 = '\0'; 2884 cpopt = *cpp; 2885 cpopt++; 2886 cp = *endcpp; 2887 savedc = *cp; 2888 *cp = '\0'; 2889 while (cpopt && *cpopt) { 2890 allflag = 1; 2891 usedarg = -2; 2892 fnd_equal = 0; 2893 if ((cpoptend = strchr(cpopt, ','))) { 2894 *cpoptend++ = '\0'; 2895 if ((cpoptarg = strchr(cpopt, '='))) { 2896 *cpoptarg++ = '\0'; 2897 fnd_equal = 1; 2898 } 2899 } else { 2900 if ((cpoptarg = strchr(cpopt, '='))) { 2901 *cpoptarg++ = '\0'; 2902 fnd_equal = 1; 2903 } else { 2904 *cp = savedc; 2905 nextfield(&cp, &endcp); 2906 **endcpp = '\0'; 2907 if (endcp > cp && *cp != '-') { 2908 cpoptarg = cp; 2909 savedc2 = *endcp; 2910 *endcp = '\0'; 2911 usedarg = 0; 2912 } 2913 } 2914 } 2915 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2916 if (fnd_equal == 1) { 2917 syslog(LOG_ERR, "= after op: %s", cpopt); 2918 return (1); 2919 } 2920 *exflagsp |= MNT_EXRDONLY; 2921 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2922 !(allflag = strcmp(cpopt, "mapall")) || 2923 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2924 usedarg++; 2925 parsecred(cpoptarg, cr); 2926 if (allflag == 0) { 2927 *exflagsp |= MNT_EXPORTANON; 2928 opt_flags |= OP_MAPALL; 2929 } else 2930 opt_flags |= OP_MAPROOT; 2931 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2932 !strcmp(cpopt, "m"))) { 2933 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2934 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2935 return (1); 2936 } 2937 usedarg++; 2938 opt_flags |= OP_MASK; 2939 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2940 !strcmp(cpopt, "n"))) { 2941 if (strchr(cpoptarg, '/') != NULL) { 2942 if (debug) 2943 fprintf(stderr, "setting OP_MASKLEN\n"); 2944 opt_flags |= OP_MASKLEN; 2945 } 2946 if (grp->gr_type != GT_NULL) { 2947 syslog(LOG_ERR, "network/host conflict"); 2948 return (1); 2949 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2950 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2951 return (1); 2952 } 2953 grp->gr_type = GT_NET; 2954 *has_hostp = 1; 2955 usedarg++; 2956 opt_flags |= OP_NET; 2957 } else if (!strcmp(cpopt, "alldirs")) { 2958 if (fnd_equal == 1) { 2959 syslog(LOG_ERR, "= after op: %s", cpopt); 2960 return (1); 2961 } 2962 if ((opt_flags & OP_NOTROOT) != 0) { 2963 syslog(LOG_ERR, "%s: path %s not mount point", 2964 cpopt, unvis_dir); 2965 if (alldirs_fail != 0) 2966 return (1); 2967 } 2968 opt_flags |= OP_ALLDIRS; 2969 } else if (!strcmp(cpopt, "public")) { 2970 if (fnd_equal == 1) { 2971 syslog(LOG_ERR, "= after op: %s", cpopt); 2972 return (1); 2973 } 2974 *exflagsp |= MNT_EXPUBLIC; 2975 } else if (!strcmp(cpopt, "webnfs")) { 2976 if (fnd_equal == 1) { 2977 syslog(LOG_ERR, "= after op: %s", cpopt); 2978 return (1); 2979 } 2980 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2981 opt_flags |= OP_MAPALL; 2982 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2983 ep->ex_indexfile = strdup(cpoptarg); 2984 } else if (!strcmp(cpopt, "quiet")) { 2985 if (fnd_equal == 1) { 2986 syslog(LOG_ERR, "= after op: %s", cpopt); 2987 return (1); 2988 } 2989 opt_flags |= OP_QUIET; 2990 } else if (cpoptarg && !strcmp(cpopt, "sec")) { 2991 if (parsesec(cpoptarg, ep)) 2992 return (1); 2993 opt_flags |= OP_SEC; 2994 usedarg++; 2995 } else if (!strcmp(cpopt, "tls")) { 2996 if (fnd_equal == 1) { 2997 syslog(LOG_ERR, "= after op: %s", cpopt); 2998 return (1); 2999 } 3000 *exflagsp |= MNT_EXTLS; 3001 } else if (!strcmp(cpopt, "tlscert")) { 3002 if (fnd_equal == 1) { 3003 syslog(LOG_ERR, "= after op: %s", cpopt); 3004 return (1); 3005 } 3006 *exflagsp |= (MNT_EXTLS | MNT_EXTLSCERT); 3007 } else if (!strcmp(cpopt, "tlscertuser")) { 3008 if (fnd_equal == 1) { 3009 syslog(LOG_ERR, "= after op: %s", cpopt); 3010 return (1); 3011 } 3012 *exflagsp |= (MNT_EXTLS | MNT_EXTLSCERT | 3013 MNT_EXTLSCERTUSER); 3014 } else { 3015 syslog(LOG_ERR, "bad opt %s", cpopt); 3016 return (1); 3017 } 3018 if (usedarg >= 0) { 3019 *endcp = savedc2; 3020 **endcpp = savedc; 3021 if (usedarg > 0) { 3022 *cpp = cp; 3023 *endcpp = endcp; 3024 } 3025 return (0); 3026 } 3027 cpopt = cpoptend; 3028 } 3029 **endcpp = savedc; 3030 return (0); 3031 } 3032 3033 /* 3034 * Translate a character string to the corresponding list of network 3035 * addresses for a hostname. 3036 */ 3037 static int 3038 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 3039 { 3040 struct grouplist *checkgrp; 3041 struct addrinfo *ai, *tai, hints; 3042 int ecode; 3043 char host[NI_MAXHOST]; 3044 3045 if (grp->gr_type != GT_NULL) { 3046 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 3047 return (1); 3048 } 3049 memset(&hints, 0, sizeof hints); 3050 hints.ai_flags = AI_CANONNAME; 3051 hints.ai_protocol = IPPROTO_UDP; 3052 ecode = getaddrinfo(cp, NULL, &hints, &ai); 3053 if (ecode != 0) { 3054 syslog(LOG_ERR,"can't get address info for host %s", cp); 3055 return 1; 3056 } 3057 grp->gr_ptr.gt_addrinfo = ai; 3058 while (ai != NULL) { 3059 if (ai->ai_canonname == NULL) { 3060 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 3061 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 3062 strlcpy(host, "?", sizeof(host)); 3063 ai->ai_canonname = strdup(host); 3064 ai->ai_flags |= AI_CANONNAME; 3065 } 3066 if (debug) 3067 fprintf(stderr, "got host %s\n", ai->ai_canonname); 3068 /* 3069 * Sanity check: make sure we don't already have an entry 3070 * for this host in the grouplist. 3071 */ 3072 for (checkgrp = tgrp; checkgrp != NULL; 3073 checkgrp = checkgrp->gr_next) { 3074 if (checkgrp->gr_type != GT_HOST) 3075 continue; 3076 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 3077 tai = tai->ai_next) { 3078 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 3079 continue; 3080 if (debug) 3081 fprintf(stderr, 3082 "ignoring duplicate host %s\n", 3083 ai->ai_canonname); 3084 grp->gr_type = GT_IGNORE; 3085 return (0); 3086 } 3087 } 3088 ai = ai->ai_next; 3089 } 3090 grp->gr_type = GT_HOST; 3091 return (0); 3092 } 3093 3094 /* 3095 * Free up an exports list component 3096 */ 3097 static void 3098 free_exp(struct exportlist *ep) 3099 { 3100 struct grouplist *grp, *tgrp; 3101 3102 if (ep->ex_defdir) { 3103 free_host(ep->ex_defdir->dp_hosts); 3104 free((caddr_t)ep->ex_defdir); 3105 } 3106 if (ep->ex_fsdir) 3107 free(ep->ex_fsdir); 3108 if (ep->ex_indexfile) 3109 free(ep->ex_indexfile); 3110 free_dir(ep->ex_dirl); 3111 grp = ep->ex_grphead; 3112 while (grp) { 3113 tgrp = grp; 3114 grp = grp->gr_next; 3115 free_grp(tgrp); 3116 } 3117 if (ep->ex_defanon.cr_groups != ep->ex_defanon.cr_smallgrps) 3118 free(ep->ex_defanon.cr_groups); 3119 free((caddr_t)ep); 3120 } 3121 3122 /* 3123 * Free up the v4root exports. 3124 */ 3125 static void 3126 free_v4rootexp(void) 3127 { 3128 3129 if (v4root_ep != NULL) { 3130 free_exp(v4root_ep); 3131 v4root_ep = NULL; 3132 } 3133 } 3134 3135 /* 3136 * Free hosts. 3137 */ 3138 static void 3139 free_host(struct hostlist *hp) 3140 { 3141 struct hostlist *hp2; 3142 3143 while (hp) { 3144 hp2 = hp; 3145 hp = hp->ht_next; 3146 free((caddr_t)hp2); 3147 } 3148 } 3149 3150 static struct hostlist * 3151 get_ht(void) 3152 { 3153 struct hostlist *hp; 3154 3155 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 3156 if (hp == (struct hostlist *)NULL) 3157 out_of_mem(); 3158 hp->ht_next = (struct hostlist *)NULL; 3159 hp->ht_flag = 0; 3160 return (hp); 3161 } 3162 3163 /* 3164 * Out of memory, fatal 3165 */ 3166 static void 3167 out_of_mem(void) 3168 { 3169 3170 syslog(LOG_ERR, "out of memory"); 3171 exit(2); 3172 } 3173 3174 /* 3175 * Call do_mount() from the struct exportlist, for each case needed. 3176 */ 3177 static int 3178 do_export_mount(struct exportlist *ep, struct statfs *fsp) 3179 { 3180 struct grouplist *grp, defgrp; 3181 int ret; 3182 size_t dirlen; 3183 3184 LOGDEBUG("do_export_mount=%s", ep->ex_fsdir); 3185 dirlen = strlen(ep->ex_fsdir); 3186 if ((ep->ex_flag & EX_DEFSET) != 0) { 3187 defgrp.gr_type = GT_DEFAULT; 3188 defgrp.gr_next = NULL; 3189 /* We have an entry for all other hosts/nets. */ 3190 LOGDEBUG("ex_defexflags=0x%jx", (uintmax_t)ep->ex_defexflags); 3191 ret = do_mount(ep, &defgrp, ep->ex_defexflags, &ep->ex_defanon, 3192 ep->ex_fsdir, dirlen, fsp, ep->ex_defnumsecflavors, 3193 ep->ex_defsecflavors); 3194 if (ret != 0) 3195 return (ret); 3196 } 3197 3198 /* Do a mount for each group. */ 3199 grp = ep->ex_grphead; 3200 while (grp != NULL) { 3201 LOGDEBUG("do mount gr_type=0x%x gr_exflags=0x%jx", 3202 grp->gr_type, (uintmax_t)grp->gr_exflags); 3203 ret = do_mount(ep, grp, grp->gr_exflags, &grp->gr_anon, 3204 ep->ex_fsdir, dirlen, fsp, grp->gr_numsecflavors, 3205 grp->gr_secflavors); 3206 if (ret != 0) 3207 return (ret); 3208 grp = grp->gr_next; 3209 } 3210 return (0); 3211 } 3212 3213 /* 3214 * Do the nmount() syscall with the update flag to push the export info into 3215 * the kernel. 3216 */ 3217 static int 3218 do_mount(struct exportlist *ep, struct grouplist *grp, uint64_t exflags, 3219 struct expcred *anoncrp, char *dirp, int dirplen, struct statfs *fsb, 3220 int numsecflavors, int *secflavors) 3221 { 3222 struct statfs fsb1; 3223 struct addrinfo *ai; 3224 struct export_args *eap; 3225 char errmsg[255]; 3226 char *cp; 3227 int done; 3228 char savedc; 3229 struct iovec *iov; 3230 int i, iovlen; 3231 int ret; 3232 struct nfsex_args nfsea; 3233 3234 eap = &nfsea.export; 3235 3236 cp = NULL; 3237 savedc = '\0'; 3238 iov = NULL; 3239 iovlen = 0; 3240 ret = 0; 3241 3242 bzero(eap, sizeof (struct export_args)); 3243 bzero(errmsg, sizeof(errmsg)); 3244 eap->ex_flags = exflags; 3245 eap->ex_uid = anoncrp->cr_uid; 3246 eap->ex_ngroups = anoncrp->cr_ngroups; 3247 /* 3248 * Use the memory pointed to by 'anoncrp', as it outlives 'eap' which is 3249 * local to this function. 3250 */ 3251 eap->ex_groups = anoncrp->cr_groups; 3252 LOGDEBUG("do_mount exflags=0x%jx", (uintmax_t)exflags); 3253 eap->ex_indexfile = ep->ex_indexfile; 3254 if (grp->gr_type == GT_HOST) 3255 ai = grp->gr_ptr.gt_addrinfo; 3256 else 3257 ai = NULL; 3258 eap->ex_numsecflavors = numsecflavors; 3259 LOGDEBUG("do_mount numsec=%d", numsecflavors); 3260 for (i = 0; i < eap->ex_numsecflavors; i++) 3261 eap->ex_secflavors[i] = secflavors[i]; 3262 if (eap->ex_numsecflavors == 0) { 3263 eap->ex_numsecflavors = 1; 3264 eap->ex_secflavors[0] = AUTH_SYS; 3265 } 3266 done = FALSE; 3267 3268 if (v4root_phase == 0) { 3269 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 3270 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 3271 build_iovec(&iov, &iovlen, "from", NULL, 0); 3272 build_iovec(&iov, &iovlen, "update", NULL, 0); 3273 build_iovec(&iov, &iovlen, "export", eap, 3274 sizeof (struct export_args)); 3275 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 3276 } 3277 3278 while (!done) { 3279 switch (grp->gr_type) { 3280 case GT_HOST: 3281 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 3282 goto skip; 3283 eap->ex_addr = ai->ai_addr; 3284 eap->ex_addrlen = ai->ai_addrlen; 3285 eap->ex_masklen = 0; 3286 break; 3287 case GT_NET: 3288 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 3289 have_v6 == 0) 3290 goto skip; 3291 eap->ex_addr = 3292 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 3293 eap->ex_addrlen = 3294 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 3295 eap->ex_mask = 3296 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 3297 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 3298 break; 3299 case GT_DEFAULT: 3300 eap->ex_addr = NULL; 3301 eap->ex_addrlen = 0; 3302 eap->ex_mask = NULL; 3303 eap->ex_masklen = 0; 3304 break; 3305 case GT_IGNORE: 3306 ret = 0; 3307 goto error_exit; 3308 break; 3309 default: 3310 syslog(LOG_ERR, "bad grouptype"); 3311 if (cp) 3312 *cp = savedc; 3313 ret = 1; 3314 goto error_exit; 3315 } 3316 3317 /* 3318 * For V4:, use the nfssvc() syscall, instead of mount(). 3319 */ 3320 if (v4root_phase == 2) { 3321 nfsea.fspec = v4root_dirpath; 3322 if (nfssvc(NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT, 3323 (caddr_t)&nfsea) < 0) { 3324 syslog(LOG_ERR, "Exporting V4: failed"); 3325 ret = 2; 3326 goto error_exit; 3327 } 3328 } else { 3329 /* 3330 * XXX: 3331 * Maybe I should just use the fsb->f_mntonname path 3332 * instead of looping back up the dirp to the mount 3333 * point?? 3334 * Also, needs to know how to export all types of local 3335 * exportable filesystems and not just "ufs". 3336 */ 3337 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 3338 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 3339 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 3340 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 3341 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 3342 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 3343 errmsg[0] = '\0'; 3344 3345 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 3346 if (cp) 3347 *cp-- = savedc; 3348 else 3349 cp = dirp + dirplen - 1; 3350 if (opt_flags & OP_QUIET) { 3351 ret = 1; 3352 goto error_exit; 3353 } 3354 if (errno == EPERM) { 3355 if (debug) 3356 warnx("can't change attributes for %s: %s", 3357 dirp, errmsg); 3358 syslog(LOG_ERR, 3359 "can't change attributes for %s: %s", 3360 dirp, errmsg); 3361 ret = 1; 3362 goto error_exit; 3363 } 3364 if ((opt_flags & OP_ALLDIRS) && 3365 alldirs_fail != 0) { 3366 if (errno == EINVAL) 3367 syslog(LOG_ERR, 3368 "-alldirs requested but %s is not a filesystem mountpoint", 3369 dirp); 3370 else 3371 syslog(LOG_ERR, 3372 "could not remount %s: %m", 3373 dirp); 3374 ret = 1; 3375 goto error_exit; 3376 } 3377 /* back up over the last component */ 3378 while (cp > dirp && *cp == '/') 3379 cp--; 3380 while (cp > dirp && *(cp - 1) != '/') 3381 cp--; 3382 if (cp == dirp) { 3383 if (debug) 3384 warnx("mnt unsucc"); 3385 syslog(LOG_ERR, "can't export %s %s", 3386 dirp, errmsg); 3387 ret = 1; 3388 goto error_exit; 3389 } 3390 savedc = *cp; 3391 *cp = '\0'; 3392 /* 3393 * Check that we're still on the same 3394 * filesystem. 3395 */ 3396 if (statfs(dirp, &fsb1) != 0 || 3397 fsidcmp(&fsb1.f_fsid, &fsb->f_fsid) != 0) { 3398 *cp = savedc; 3399 syslog(LOG_ERR, 3400 "can't export %s %s", dirp, 3401 errmsg); 3402 ret = 1; 3403 goto error_exit; 3404 } 3405 } 3406 } 3407 3408 /* 3409 * For the experimental server: 3410 * If this is the public directory, get the file handle 3411 * and load it into the kernel via the nfssvc() syscall. 3412 */ 3413 if ((exflags & MNT_EXPUBLIC) != 0) { 3414 fhandle_t fh; 3415 char *public_name; 3416 3417 if (eap->ex_indexfile != NULL) 3418 public_name = eap->ex_indexfile; 3419 else 3420 public_name = dirp; 3421 if (getfh(public_name, &fh) < 0) 3422 syslog(LOG_ERR, 3423 "Can't get public fh for %s", public_name); 3424 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 3425 syslog(LOG_ERR, 3426 "Can't set public fh for %s", public_name); 3427 else { 3428 has_publicfh = 1; 3429 has_set_publicfh = 1; 3430 ep->ex_flag |= EX_PUBLICFH; 3431 } 3432 } 3433 skip: 3434 if (ai != NULL) 3435 ai = ai->ai_next; 3436 if (ai == NULL) 3437 done = TRUE; 3438 } 3439 if (cp) 3440 *cp = savedc; 3441 error_exit: 3442 free_iovec(&iov, &iovlen); 3443 return (ret); 3444 } 3445 3446 /* 3447 * Translate a net address. 3448 * 3449 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 3450 */ 3451 static int 3452 get_net(char *cp, struct netmsk *net, int maskflg) 3453 { 3454 struct netent *np = NULL; 3455 char *name, *p, *prefp; 3456 struct sockaddr_in sin; 3457 struct sockaddr *sa = NULL; 3458 struct addrinfo hints, *ai = NULL; 3459 char netname[NI_MAXHOST]; 3460 long preflen; 3461 3462 p = prefp = NULL; 3463 if ((opt_flags & OP_MASKLEN) && !maskflg) { 3464 p = strchr(cp, '/'); 3465 *p = '\0'; 3466 prefp = p + 1; 3467 } 3468 3469 /* 3470 * Check for a numeric address first. We wish to avoid 3471 * possible DNS lookups in getnetbyname(). 3472 */ 3473 if (isxdigit(*cp) || *cp == ':') { 3474 memset(&hints, 0, sizeof hints); 3475 /* Ensure the mask and the network have the same family. */ 3476 if (maskflg && (opt_flags & OP_NET)) 3477 hints.ai_family = net->nt_net.ss_family; 3478 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 3479 hints.ai_family = net->nt_mask.ss_family; 3480 else 3481 hints.ai_family = AF_UNSPEC; 3482 hints.ai_flags = AI_NUMERICHOST; 3483 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 3484 sa = ai->ai_addr; 3485 if (sa != NULL && ai->ai_family == AF_INET) { 3486 /* 3487 * The address in `cp' is really a network address, so 3488 * use inet_network() to re-interpret this correctly. 3489 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 3490 */ 3491 bzero(&sin, sizeof sin); 3492 sin.sin_family = AF_INET; 3493 sin.sin_len = sizeof sin; 3494 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 3495 if (debug) 3496 fprintf(stderr, "get_net: v4 addr %s\n", 3497 inet_ntoa(sin.sin_addr)); 3498 sa = (struct sockaddr *)&sin; 3499 } 3500 } 3501 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 3502 bzero(&sin, sizeof sin); 3503 sin.sin_family = AF_INET; 3504 sin.sin_len = sizeof sin; 3505 sin.sin_addr = inet_makeaddr(np->n_net, 0); 3506 sa = (struct sockaddr *)&sin; 3507 } 3508 if (sa == NULL) 3509 goto fail; 3510 3511 if (maskflg) { 3512 /* The specified sockaddr is a mask. */ 3513 if (checkmask(sa) != 0) 3514 goto fail; 3515 bcopy(sa, &net->nt_mask, sa->sa_len); 3516 opt_flags |= OP_HAVEMASK; 3517 opt_flags &= ~OP_CLASSMASK; 3518 } else { 3519 /* The specified sockaddr is a network address. */ 3520 bcopy(sa, &net->nt_net, sa->sa_len); 3521 3522 /* Get a network name for the export list. */ 3523 if (np) { 3524 name = np->n_name; 3525 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 3526 NULL, 0, NI_NUMERICHOST) == 0) { 3527 name = netname; 3528 } else { 3529 goto fail; 3530 } 3531 if ((net->nt_name = strdup(name)) == NULL) 3532 out_of_mem(); 3533 3534 /* 3535 * Extract a mask from either a "/<masklen>" suffix, or 3536 * from the class of an IPv4 address. 3537 */ 3538 if (opt_flags & OP_MASKLEN) { 3539 preflen = strtol(prefp, NULL, 10); 3540 if (preflen < 0L || preflen == LONG_MAX) 3541 goto fail; 3542 bcopy(sa, &net->nt_mask, sa->sa_len); 3543 if (makemask(&net->nt_mask, (int)preflen) != 0) 3544 goto fail; 3545 opt_flags |= OP_HAVEMASK; 3546 *p = '/'; 3547 } else if (sa->sa_family == AF_INET && 3548 (opt_flags & OP_MASK) == 0) { 3549 in_addr_t addr; 3550 3551 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 3552 if (IN_CLASSA(addr)) 3553 preflen = 8; 3554 else if (IN_CLASSB(addr)) 3555 preflen = 16; 3556 else if (IN_CLASSC(addr)) 3557 preflen = 24; 3558 else if (IN_CLASSD(addr)) /* XXX Multicast??? */ 3559 preflen = 28; 3560 else 3561 preflen = 32; /* XXX */ 3562 3563 bcopy(sa, &net->nt_mask, sa->sa_len); 3564 makemask(&net->nt_mask, (int)preflen); 3565 opt_flags |= OP_HAVEMASK | OP_CLASSMASK; 3566 } 3567 } 3568 3569 if (ai) 3570 freeaddrinfo(ai); 3571 return 0; 3572 3573 fail: 3574 if (ai) 3575 freeaddrinfo(ai); 3576 return 1; 3577 } 3578 3579 /* 3580 * Parse out the next white space separated field 3581 */ 3582 static void 3583 nextfield(char **cp, char **endcp) 3584 { 3585 char *p; 3586 char quot = 0; 3587 3588 p = *cp; 3589 while (*p == ' ' || *p == '\t') 3590 p++; 3591 *cp = p; 3592 while (*p != '\0') { 3593 if (quot) { 3594 if (*p == quot) 3595 quot = 0; 3596 } else { 3597 if (*p == '\\' && *(p + 1) != '\0') 3598 p++; 3599 else if (*p == '\'' || *p == '"') 3600 quot = *p; 3601 else if (*p == ' ' || *p == '\t') 3602 break; 3603 } 3604 p++; 3605 }; 3606 *endcp = p; 3607 } 3608 3609 /* 3610 * Get an exports file line. Skip over blank lines and handle line 3611 * continuations. 3612 */ 3613 static int 3614 get_line(void) 3615 { 3616 char *p, *cp; 3617 size_t len; 3618 int totlen, cont_line; 3619 3620 /* 3621 * Loop around ignoring blank lines and getting all continuation lines. 3622 */ 3623 p = line; 3624 totlen = 0; 3625 do { 3626 if ((p = fgetln(exp_file, &len)) == NULL) 3627 return (0); 3628 cp = p + len - 1; 3629 cont_line = 0; 3630 while (cp >= p && 3631 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 3632 if (*cp == '\\') 3633 cont_line = 1; 3634 cp--; 3635 len--; 3636 } 3637 if (cont_line) { 3638 *++cp = ' '; 3639 len++; 3640 } 3641 if (linesize < len + totlen + 1) { 3642 linesize = len + totlen + 1; 3643 line = realloc(line, linesize); 3644 if (line == NULL) 3645 out_of_mem(); 3646 } 3647 memcpy(line + totlen, p, len); 3648 totlen += len; 3649 line[totlen] = '\0'; 3650 } while (totlen == 0 || cont_line); 3651 return (1); 3652 } 3653 3654 /* 3655 * Parse a description of a credential. 3656 */ 3657 static void 3658 parsecred(char *names, struct expcred *cr) 3659 { 3660 char *name; 3661 struct passwd *pw; 3662 unsigned long name_ul; 3663 char *end = NULL; 3664 3665 assert(cr->cr_groups == tmp_groups); 3666 3667 /* 3668 * Parse the user and if possible get its password table entry. 3669 * 'cr_uid' is filled when exiting this block. 3670 */ 3671 name = strsep_quote(&names, ":"); 3672 name_ul = strtoul(name, &end, 10); 3673 if (*end != '\0' || end == name) 3674 pw = getpwnam(name); 3675 else 3676 pw = getpwuid((uid_t)name_ul); 3677 if (pw != NULL) { 3678 cr->cr_uid = pw->pw_uid; 3679 } else if (*end != '\0' || end == name) { 3680 syslog(LOG_ERR, "unknown user: %s", name); 3681 cr->cr_uid = UID_NOBODY; 3682 goto nogroup; 3683 } else { 3684 cr->cr_uid = name_ul; 3685 } 3686 3687 /* 3688 * Credentials specified as those of a user (i.e., use its associated 3689 * groups as specified in the password database). 3690 */ 3691 if (names == NULL) { 3692 if (pw == NULL) { 3693 syslog(LOG_ERR, "no passwd entry for user: %s, " 3694 "can't determine groups", name); 3695 goto nogroup; 3696 } 3697 3698 cr->cr_ngroups = tngroups_max; 3699 if (getgrouplist(pw->pw_name, pw->pw_gid, 3700 cr->cr_groups, &cr->cr_ngroups) != 0) { 3701 syslog(LOG_ERR, "too many groups"); 3702 cr->cr_ngroups = tngroups_max; 3703 } 3704 return; 3705 } 3706 3707 /* 3708 * Explicit credentials specified as a colon separated list: 3709 * uid:gid:gid:... 3710 */ 3711 cr->cr_ngroups = 0; 3712 while (names != NULL && *names != '\0') { 3713 const struct group *gr; 3714 gid_t group; 3715 3716 name = strsep_quote(&names, ":"); 3717 name_ul = strtoul(name, &end, 10); 3718 if (*end != '\0' || end == name) { 3719 if ((gr = getgrnam(name)) == NULL) { 3720 syslog(LOG_ERR, "unknown group: %s", name); 3721 continue; 3722 } 3723 group = gr->gr_gid; 3724 } else { 3725 group = name_ul; 3726 } 3727 if (cr->cr_ngroups == tngroups_max) { 3728 syslog(LOG_ERR, "too many groups"); 3729 break; 3730 } 3731 cr->cr_groups[cr->cr_ngroups++] = group; 3732 } 3733 if (cr->cr_ngroups == 0) 3734 goto nogroup; 3735 return; 3736 3737 nogroup: 3738 cr->cr_ngroups = 1; 3739 cr->cr_groups[0] = nogroup(); 3740 } 3741 3742 #define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 3743 /* 3744 * Routines that maintain the remote mounttab 3745 */ 3746 static void 3747 get_mountlist(void) 3748 { 3749 struct mountlist *mlp; 3750 char *host, *dirp, *cp; 3751 char str[STRSIZ]; 3752 FILE *mlfile; 3753 3754 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 3755 if (errno == ENOENT) 3756 return; 3757 else { 3758 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 3759 return; 3760 } 3761 } 3762 while (fgets(str, STRSIZ, mlfile) != NULL) { 3763 cp = str; 3764 host = strsep(&cp, " \t\n"); 3765 dirp = strsep(&cp, " \t\n"); 3766 if (host == NULL || dirp == NULL) 3767 continue; 3768 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3769 if (mlp == (struct mountlist *)NULL) 3770 out_of_mem(); 3771 strncpy(mlp->ml_host, host, MNTNAMLEN); 3772 mlp->ml_host[MNTNAMLEN] = '\0'; 3773 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3774 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3775 3776 SLIST_INSERT_HEAD(&mlhead, mlp, next); 3777 } 3778 fclose(mlfile); 3779 } 3780 3781 static void 3782 del_mlist(char *hostp, char *dirp) 3783 { 3784 struct mountlist *mlp, *mlp2; 3785 FILE *mlfile; 3786 int fnd = 0; 3787 3788 SLIST_FOREACH_SAFE(mlp, &mlhead, next, mlp2) { 3789 if (!strcmp(mlp->ml_host, hostp) && 3790 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 3791 fnd = 1; 3792 SLIST_REMOVE(&mlhead, mlp, mountlist, next); 3793 free((caddr_t)mlp); 3794 } 3795 } 3796 if (fnd) { 3797 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 3798 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 3799 return; 3800 } 3801 SLIST_FOREACH(mlp, &mlhead, next) { 3802 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3803 } 3804 fclose(mlfile); 3805 } 3806 } 3807 3808 static void 3809 add_mlist(char *hostp, char *dirp) 3810 { 3811 struct mountlist *mlp; 3812 FILE *mlfile; 3813 3814 SLIST_FOREACH(mlp, &mlhead, next) { 3815 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 3816 return; 3817 } 3818 3819 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3820 if (mlp == (struct mountlist *)NULL) 3821 out_of_mem(); 3822 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 3823 mlp->ml_host[MNTNAMLEN] = '\0'; 3824 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3825 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3826 SLIST_INSERT_HEAD(&mlhead, mlp, next); 3827 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 3828 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 3829 return; 3830 } 3831 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3832 fclose(mlfile); 3833 } 3834 3835 /* 3836 * Free up a group list. 3837 */ 3838 static void 3839 free_grp(struct grouplist *grp) 3840 { 3841 if (grp->gr_type == GT_HOST) { 3842 if (grp->gr_ptr.gt_addrinfo != NULL) 3843 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 3844 } else if (grp->gr_type == GT_NET) { 3845 if (grp->gr_ptr.gt_net.nt_name) 3846 free(grp->gr_ptr.gt_net.nt_name); 3847 } 3848 if (grp->gr_anon.cr_groups != grp->gr_anon.cr_smallgrps) 3849 free(grp->gr_anon.cr_groups); 3850 free((caddr_t)grp); 3851 } 3852 3853 #ifdef DEBUG 3854 static void 3855 SYSLOG(int pri, const char *fmt, ...) 3856 { 3857 va_list ap; 3858 3859 va_start(ap, fmt); 3860 vfprintf(stderr, fmt, ap); 3861 va_end(ap); 3862 } 3863 #endif /* DEBUG */ 3864 3865 /* 3866 * Check options for consistency. 3867 */ 3868 static int 3869 check_options(struct dirlist *dp) 3870 { 3871 3872 if (v4root_phase == 0 && dp == NULL) 3873 return (1); 3874 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 3875 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 3876 return (1); 3877 } 3878 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 3879 syslog(LOG_ERR, "-mask requires -network"); 3880 return (1); 3881 } 3882 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 3883 syslog(LOG_ERR, "-network requires mask specification"); 3884 return (1); 3885 } 3886 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3887 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3888 return (1); 3889 } 3890 if (v4root_phase > 0 && 3891 (opt_flags & 3892 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3893 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3894 return (1); 3895 } 3896 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3897 syslog(LOG_ERR, "-alldirs has multiple directories"); 3898 return (1); 3899 } 3900 return (0); 3901 } 3902 3903 static int 3904 check_path_component(const char *path, char **err) 3905 { 3906 struct stat sb; 3907 3908 if (lstat(path, &sb)) { 3909 asprintf(err, "%s: lstat() failed: %s.\n", 3910 path, strerror(errno)); 3911 return (0); 3912 } 3913 3914 switch (sb.st_mode & S_IFMT) { 3915 case S_IFDIR: 3916 return (1); 3917 case S_IFLNK: 3918 asprintf(err, "%s: path is a symbolic link.\n", path); 3919 break; 3920 case S_IFREG: 3921 asprintf(err, "%s: path is a file rather than a directory.\n", 3922 path); 3923 break; 3924 default: 3925 asprintf(err, "%s: path is not a directory.\n", path); 3926 } 3927 3928 return (0); 3929 } 3930 3931 /* 3932 * Check each path component for the presence of symbolic links. Return true 3933 */ 3934 static int 3935 check_dirpath(char *dirp, char **err) 3936 { 3937 char *cp; 3938 3939 cp = dirp + 1; 3940 while (*cp) { 3941 if (*cp == '/') { 3942 *cp = '\0'; 3943 3944 if (!check_path_component(dirp, err)) { 3945 *cp = '/'; 3946 return (0); 3947 } 3948 3949 *cp = '/'; 3950 } 3951 cp++; 3952 } 3953 3954 if (!check_path_component(dirp, err)) 3955 return (0); 3956 3957 return (1); 3958 } 3959 3960 /* 3961 * Populate statfs information. Return true on success. 3962 */ 3963 static int 3964 check_statfs(const char *dirp, struct statfs *fsb, char **err) 3965 { 3966 if (statfs(dirp, fsb)) { 3967 asprintf(err, "%s: statfs() failed: %s\n", dirp, 3968 strerror(errno)); 3969 return (0); 3970 } 3971 3972 return (1); 3973 } 3974 3975 /* 3976 * Make a netmask according to the specified prefix length. The ss_family 3977 * and other non-address fields must be initialised before calling this. 3978 */ 3979 static int 3980 makemask(struct sockaddr_storage *ssp, int bitlen) 3981 { 3982 u_char *p; 3983 int bits, i, len; 3984 3985 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3986 return (-1); 3987 if (bitlen > len * CHAR_BIT) 3988 return (-1); 3989 3990 for (i = 0; i < len; i++) { 3991 bits = MIN(CHAR_BIT, bitlen); 3992 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3993 bitlen -= bits; 3994 } 3995 return 0; 3996 } 3997 3998 /* 3999 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 4000 * is acceptable (i.e. of the form 1...10....0). 4001 */ 4002 static int 4003 checkmask(struct sockaddr *sa) 4004 { 4005 u_char *mask; 4006 int i, len; 4007 4008 if ((mask = sa_rawaddr(sa, &len)) == NULL) 4009 return (-1); 4010 4011 for (i = 0; i < len; i++) 4012 if (mask[i] != 0xff) 4013 break; 4014 if (i < len) { 4015 if (~mask[i] & (u_char)(~mask[i] + 1)) 4016 return (-1); 4017 i++; 4018 } 4019 for (; i < len; i++) 4020 if (mask[i] != 0) 4021 return (-1); 4022 return (0); 4023 } 4024 4025 /* 4026 * Compare two sockaddrs according to a specified mask. Return zero if 4027 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 4028 * If samask is NULL, perform a full comparison. 4029 */ 4030 static int 4031 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 4032 { 4033 unsigned char *p1, *p2, *mask; 4034 int len, i; 4035 4036 if (sa1->sa_family != sa2->sa_family || 4037 (p1 = sa_rawaddr(sa1, &len)) == NULL || 4038 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 4039 return (1); 4040 4041 switch (sa1->sa_family) { 4042 case AF_INET6: 4043 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 4044 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 4045 return (1); 4046 break; 4047 } 4048 4049 /* Simple binary comparison if no mask specified. */ 4050 if (samask == NULL) 4051 return (memcmp(p1, p2, len)); 4052 4053 /* Set up the mask, and do a mask-based comparison. */ 4054 if (sa1->sa_family != samask->sa_family || 4055 (mask = sa_rawaddr(samask, NULL)) == NULL) 4056 return (1); 4057 4058 for (i = 0; i < len; i++) 4059 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 4060 return (1); 4061 return (0); 4062 } 4063 4064 /* 4065 * Return a pointer to the part of the sockaddr that contains the 4066 * raw address, and set *nbytes to its length in bytes. Returns 4067 * NULL if the address family is unknown. 4068 */ 4069 static void * 4070 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 4071 void *p; 4072 int len; 4073 4074 switch (sa->sa_family) { 4075 case AF_INET: 4076 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 4077 p = &((struct sockaddr_in *)sa)->sin_addr; 4078 break; 4079 case AF_INET6: 4080 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 4081 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 4082 break; 4083 default: 4084 p = NULL; 4085 len = 0; 4086 } 4087 4088 if (nbytes != NULL) 4089 *nbytes = len; 4090 return (p); 4091 } 4092 4093 static void 4094 huphandler(int sig __unused) 4095 { 4096 4097 got_sighup = 1; 4098 } 4099 4100 static void 4101 terminate(int sig __unused) 4102 { 4103 free(tmp_groups); 4104 pidfile_remove(pfh); 4105 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 4106 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 4107 exit (0); 4108 } 4109 4110 static void 4111 cp_cred(struct expcred *outcr, struct expcred *incr) 4112 { 4113 4114 outcr->cr_uid = incr->cr_uid; 4115 outcr->cr_ngroups = incr->cr_ngroups; 4116 if (outcr->cr_ngroups > SMALLNGROUPS) 4117 outcr->cr_groups = malloc(outcr->cr_ngroups * sizeof(gid_t)); 4118 else 4119 outcr->cr_groups = outcr->cr_smallgrps; 4120 memcpy(outcr->cr_groups, incr->cr_groups, incr->cr_ngroups * 4121 sizeof(gid_t)); 4122 } 4123 4124 static gid_t 4125 nogroup() 4126 { 4127 static gid_t nogroup = 0; /* 0 means unset. */ 4128 4129 if (nogroup == 0) { 4130 const struct group *gr = getgrnam("nogroup"); 4131 4132 if (gr != NULL && gr->gr_gid != 0) 4133 nogroup = gr->gr_gid; 4134 else 4135 nogroup = GID_NOGROUP; 4136 } 4137 return (nogroup); 4138 } 4139