1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1989, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)nfsd.c 8.9 (Berkeley) 3/29/95"; 44 #endif 45 #endif /* not lint */ 46 47 #include <sys/param.h> 48 #include <sys/syslog.h> 49 #include <sys/wait.h> 50 #include <sys/mount.h> 51 #include <sys/fcntl.h> 52 #include <sys/linker.h> 53 #include <sys/module.h> 54 #include <sys/types.h> 55 #include <sys/stat.h> 56 #include <sys/sysctl.h> 57 #include <sys/ucred.h> 58 59 #include <rpc/rpc.h> 60 #include <rpc/pmap_clnt.h> 61 #include <rpcsvc/nfs_prot.h> 62 63 #include <netdb.h> 64 #include <arpa/inet.h> 65 #include <nfs/nfssvc.h> 66 67 #include <fs/nfs/nfsproto.h> 68 #include <fs/nfs/nfskpiport.h> 69 #include <fs/nfs/nfs.h> 70 71 #include <err.h> 72 #include <errno.h> 73 #include <signal.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <unistd.h> 78 #include <sysexits.h> 79 80 #include <getopt.h> 81 82 static int debug = 0; 83 84 #define NFSD_STABLERESTART "/var/db/nfs-stablerestart" 85 #define NFSD_STABLEBACKUP "/var/db/nfs-stablerestart.bak" 86 #define MAXNFSDCNT 256 87 #define DEFNFSDCNT 4 88 #define NFS_VER2 2 89 #define NFS_VER3 3 90 #define NFS_VER4 4 91 static pid_t children[MAXNFSDCNT]; /* PIDs of children */ 92 static pid_t masterpid; /* PID of master/parent */ 93 static int nfsdcnt; /* number of children */ 94 static int nfsdcnt_set; 95 static int minthreads; 96 static int maxthreads; 97 static int nfssvc_nfsd; /* Set to correct NFSSVC_xxx flag */ 98 static int stablefd = -1; /* Fd for the stable restart file */ 99 static int backupfd; /* Fd for the backup stable restart file */ 100 static const char *getopt_shortopts; 101 static const char *getopt_usage; 102 static int nfs_minvers = NFS_VER2; 103 104 static int minthreads_set; 105 static int maxthreads_set; 106 107 static struct option longopts[] = { 108 { "debug", no_argument, &debug, 1 }, 109 { "minthreads", required_argument, &minthreads_set, 1 }, 110 { "maxthreads", required_argument, &maxthreads_set, 1 }, 111 { "pnfs", required_argument, NULL, 'p' }, 112 { "mirror", required_argument, NULL, 'm' }, 113 { NULL, 0, NULL, 0} 114 }; 115 116 static void cleanup(int); 117 static void child_cleanup(int); 118 static void killchildren(void); 119 static void nfsd_exit(int); 120 static void nonfs(int); 121 static void reapchild(int); 122 static int setbindhost(struct addrinfo **ia, const char *bindhost, 123 struct addrinfo hints); 124 static void start_server(int, struct nfsd_nfsd_args *, const char *vhost); 125 static void unregistration(void); 126 static void usage(void); 127 static void open_stable(int *, int *); 128 static void copy_stable(int, int); 129 static void backup_stable(int); 130 static void set_nfsdcnt(int); 131 static void parse_dsserver(const char *, struct nfsd_nfsd_args *); 132 133 /* 134 * Nfs server daemon mostly just a user context for nfssvc() 135 * 136 * 1 - do file descriptor and signal cleanup 137 * 2 - fork the nfsd(s) 138 * 3 - create server socket(s) 139 * 4 - register socket with rpcbind 140 * 141 * For connectionless protocols, just pass the socket into the kernel via. 142 * nfssvc(). 143 * For connection based sockets, loop doing accepts. When you get a new 144 * socket from accept, pass the msgsock into the kernel via. nfssvc(). 145 * The arguments are: 146 * -r - reregister with rpcbind 147 * -d - unregister with rpcbind 148 * -t - support tcp nfs clients 149 * -u - support udp nfs clients 150 * -e - forces it to run a server that supports nfsv4 151 * -p - enable a pNFS service 152 * -m - set the mirroring level for a pNFS service 153 * followed by "n" which is the number of nfsds' to fork off 154 */ 155 int 156 main(int argc, char **argv) 157 { 158 struct nfsd_addsock_args addsockargs; 159 struct addrinfo *ai_udp, *ai_tcp, *ai_udp6, *ai_tcp6, hints; 160 struct netconfig *nconf_udp, *nconf_tcp, *nconf_udp6, *nconf_tcp6; 161 struct netbuf nb_udp, nb_tcp, nb_udp6, nb_tcp6; 162 struct sockaddr_storage peer; 163 fd_set ready, sockbits; 164 int ch, connect_type_cnt, i, maxsock, msgsock; 165 socklen_t len; 166 int on = 1, unregister, reregister, sock; 167 int tcp6sock, ip6flag, tcpflag, tcpsock; 168 int udpflag, ecode, error, s; 169 int bindhostc, bindanyflag, rpcbreg, rpcbregcnt; 170 int nfssvc_addsock; 171 int jailed, longindex = 0; 172 size_t jailed_size, nfs_minvers_size; 173 const char *lopt; 174 char **bindhost = NULL; 175 pid_t pid; 176 struct nfsd_nfsd_args nfsdargs; 177 const char *vhostname = NULL; 178 179 nfsdargs.mirrorcnt = 1; 180 nfsdargs.addr = NULL; 181 nfsdargs.addrlen = 0; 182 nfsdcnt = DEFNFSDCNT; 183 unregister = reregister = tcpflag = maxsock = 0; 184 bindanyflag = udpflag = connect_type_cnt = bindhostc = 0; 185 getopt_shortopts = "ah:n:rdtuep:m:V:"; 186 getopt_usage = 187 "usage:\n" 188 " nfsd [-ardtue] [-h bindip]\n" 189 " [-n numservers] [--minthreads #] [--maxthreads #]\n" 190 " [-p/--pnfs dsserver0:/dsserver0-mounted-on-dir,...," 191 "dsserverN:/dsserverN-mounted-on-dir] [-m mirrorlevel]\n" 192 " [-V virtual_hostname]\n"; 193 while ((ch = getopt_long(argc, argv, getopt_shortopts, longopts, 194 &longindex)) != -1) 195 switch (ch) { 196 case 'V': 197 if (strlen(optarg) <= MAXHOSTNAMELEN) 198 vhostname = optarg; 199 else 200 warnx("Virtual host name (%s) is too long", 201 optarg); 202 break; 203 case 'a': 204 bindanyflag = 1; 205 break; 206 case 'n': 207 set_nfsdcnt(atoi(optarg)); 208 break; 209 case 'h': 210 bindhostc++; 211 bindhost = realloc(bindhost,sizeof(char *)*bindhostc); 212 if (bindhost == NULL) 213 errx(1, "Out of memory"); 214 bindhost[bindhostc-1] = strdup(optarg); 215 if (bindhost[bindhostc-1] == NULL) 216 errx(1, "Out of memory"); 217 break; 218 case 'r': 219 reregister = 1; 220 break; 221 case 'd': 222 unregister = 1; 223 break; 224 case 't': 225 tcpflag = 1; 226 break; 227 case 'u': 228 udpflag = 1; 229 break; 230 case 'e': 231 /* now a no-op, since this is the default */ 232 break; 233 case 'p': 234 /* Parse out the DS server host names and mount pts. */ 235 parse_dsserver(optarg, &nfsdargs); 236 break; 237 case 'm': 238 /* Set the mirror level for a pNFS service. */ 239 i = atoi(optarg); 240 if (i < 2 || i > NFSDEV_MAXMIRRORS) 241 errx(1, "Mirror level out of range 2<-->%d", 242 NFSDEV_MAXMIRRORS); 243 nfsdargs.mirrorcnt = i; 244 break; 245 case 0: 246 lopt = longopts[longindex].name; 247 if (!strcmp(lopt, "minthreads")) { 248 minthreads = atoi(optarg); 249 } else if (!strcmp(lopt, "maxthreads")) { 250 maxthreads = atoi(optarg); 251 } 252 break; 253 default: 254 case '?': 255 usage(); 256 } 257 if (!tcpflag && !udpflag) 258 udpflag = 1; 259 argv += optind; 260 argc -= optind; 261 if (minthreads_set && maxthreads_set && minthreads > maxthreads) 262 errx(EX_USAGE, 263 "error: minthreads(%d) can't be greater than " 264 "maxthreads(%d)", minthreads, maxthreads); 265 266 /* 267 * XXX 268 * Backward compatibility, trailing number is the count of daemons. 269 */ 270 if (argc > 1) 271 usage(); 272 if (argc == 1) 273 set_nfsdcnt(atoi(argv[0])); 274 275 /* 276 * Unless the "-o" option was specified, try and run "nfsd". 277 * If "-o" was specified, try and run "nfsserver". 278 */ 279 if (modfind("nfsd") < 0) { 280 /* Not present in kernel, try loading it */ 281 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 282 errx(1, "NFS server is not available"); 283 } 284 285 ip6flag = 1; 286 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 287 if (s == -1) { 288 if (errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT) 289 err(1, "socket"); 290 ip6flag = 0; 291 } else if (getnetconfigent("udp6") == NULL || 292 getnetconfigent("tcp6") == NULL) { 293 ip6flag = 0; 294 } 295 if (s != -1) 296 close(s); 297 298 if (bindhostc == 0 || bindanyflag) { 299 bindhostc++; 300 bindhost = realloc(bindhost,sizeof(char *)*bindhostc); 301 if (bindhost == NULL) 302 errx(1, "Out of memory"); 303 bindhost[bindhostc-1] = strdup("*"); 304 if (bindhost[bindhostc-1] == NULL) 305 errx(1, "Out of memory"); 306 } 307 308 if (unregister) { 309 /* 310 * Unregister before setting nfs_minvers, in case the 311 * value of vfs.nfsd.server_min_nfsvers has changed 312 * since registering with rpcbind. 313 */ 314 unregistration(); 315 exit (0); 316 } 317 318 nfs_minvers_size = sizeof(nfs_minvers); 319 error = sysctlbyname("vfs.nfsd.server_min_nfsvers", &nfs_minvers, 320 &nfs_minvers_size, NULL, 0); 321 if (error != 0 || nfs_minvers < NFS_VER2 || nfs_minvers > NFS_VER4) { 322 warnx("sysctlbyname(vfs.nfsd.server_min_nfsvers) failed," 323 " defaulting to NFSv2"); 324 nfs_minvers = NFS_VER2; 325 } 326 327 if (reregister) { 328 if (udpflag) { 329 memset(&hints, 0, sizeof hints); 330 hints.ai_flags = AI_PASSIVE; 331 hints.ai_family = AF_INET; 332 hints.ai_socktype = SOCK_DGRAM; 333 hints.ai_protocol = IPPROTO_UDP; 334 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp); 335 if (ecode != 0) 336 err(1, "getaddrinfo udp: %s", gai_strerror(ecode)); 337 nconf_udp = getnetconfigent("udp"); 338 if (nconf_udp == NULL) 339 err(1, "getnetconfigent udp failed"); 340 nb_udp.buf = ai_udp->ai_addr; 341 nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen; 342 if (nfs_minvers == NFS_VER2) 343 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp, 344 &nb_udp)) 345 err(1, "rpcb_set udp failed"); 346 if (nfs_minvers <= NFS_VER3) 347 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp, 348 &nb_udp)) 349 err(1, "rpcb_set udp failed"); 350 freeaddrinfo(ai_udp); 351 } 352 if (udpflag && ip6flag) { 353 memset(&hints, 0, sizeof hints); 354 hints.ai_flags = AI_PASSIVE; 355 hints.ai_family = AF_INET6; 356 hints.ai_socktype = SOCK_DGRAM; 357 hints.ai_protocol = IPPROTO_UDP; 358 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6); 359 if (ecode != 0) 360 err(1, "getaddrinfo udp6: %s", gai_strerror(ecode)); 361 nconf_udp6 = getnetconfigent("udp6"); 362 if (nconf_udp6 == NULL) 363 err(1, "getnetconfigent udp6 failed"); 364 nb_udp6.buf = ai_udp6->ai_addr; 365 nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen; 366 if (nfs_minvers == NFS_VER2) 367 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp6, 368 &nb_udp6)) 369 err(1, "rpcb_set udp6 failed"); 370 if (nfs_minvers <= NFS_VER3) 371 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp6, 372 &nb_udp6)) 373 err(1, "rpcb_set udp6 failed"); 374 freeaddrinfo(ai_udp6); 375 } 376 if (tcpflag) { 377 memset(&hints, 0, sizeof hints); 378 hints.ai_flags = AI_PASSIVE; 379 hints.ai_family = AF_INET; 380 hints.ai_socktype = SOCK_STREAM; 381 hints.ai_protocol = IPPROTO_TCP; 382 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp); 383 if (ecode != 0) 384 err(1, "getaddrinfo tcp: %s", gai_strerror(ecode)); 385 nconf_tcp = getnetconfigent("tcp"); 386 if (nconf_tcp == NULL) 387 err(1, "getnetconfigent tcp failed"); 388 nb_tcp.buf = ai_tcp->ai_addr; 389 nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen; 390 if (nfs_minvers == NFS_VER2) 391 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp, 392 &nb_tcp)) 393 err(1, "rpcb_set tcp failed"); 394 if (nfs_minvers <= NFS_VER3) 395 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp, 396 &nb_tcp)) 397 err(1, "rpcb_set tcp failed"); 398 freeaddrinfo(ai_tcp); 399 } 400 if (tcpflag && ip6flag) { 401 memset(&hints, 0, sizeof hints); 402 hints.ai_flags = AI_PASSIVE; 403 hints.ai_family = AF_INET6; 404 hints.ai_socktype = SOCK_STREAM; 405 hints.ai_protocol = IPPROTO_TCP; 406 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6); 407 if (ecode != 0) 408 err(1, "getaddrinfo tcp6: %s", gai_strerror(ecode)); 409 nconf_tcp6 = getnetconfigent("tcp6"); 410 if (nconf_tcp6 == NULL) 411 err(1, "getnetconfigent tcp6 failed"); 412 nb_tcp6.buf = ai_tcp6->ai_addr; 413 nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen; 414 if (nfs_minvers == NFS_VER2) 415 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp6, 416 &nb_tcp6)) 417 err(1, "rpcb_set tcp6 failed"); 418 if (nfs_minvers <= NFS_VER3) 419 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp6, 420 &nb_tcp6)) 421 err(1, "rpcb_set tcp6 failed"); 422 freeaddrinfo(ai_tcp6); 423 } 424 exit (0); 425 } 426 if (debug == 0) { 427 daemon(0, 0); 428 (void)signal(SIGHUP, SIG_IGN); 429 (void)signal(SIGINT, SIG_IGN); 430 /* 431 * nfsd sits in the kernel most of the time. It needs 432 * to ignore SIGTERM/SIGQUIT in order to stay alive as long 433 * as possible during a shutdown, otherwise loopback 434 * mounts will not be able to unmount. 435 */ 436 (void)signal(SIGTERM, SIG_IGN); 437 (void)signal(SIGQUIT, SIG_IGN); 438 } 439 (void)signal(SIGSYS, nonfs); 440 (void)signal(SIGCHLD, reapchild); 441 (void)signal(SIGUSR2, backup_stable); 442 443 openlog("nfsd", LOG_PID | (debug ? LOG_PERROR : 0), LOG_DAEMON); 444 445 /* 446 * For V4, we open the stablerestart file and call nfssvc() 447 * to get it loaded. This is done before the daemons do the 448 * regular nfssvc() call to service NFS requests. 449 * (This way the file remains open until the last nfsd is killed 450 * off.) 451 * It and the backup copy will be created as empty files 452 * the first time this nfsd is started and should never be 453 * deleted/replaced if at all possible. It should live on a 454 * local, non-volatile storage device that does not do hardware 455 * level write-back caching. (See SCSI doc for more information 456 * on how to prevent write-back caching on SCSI disks.) 457 */ 458 open_stable(&stablefd, &backupfd); 459 if (stablefd < 0) { 460 syslog(LOG_ERR, "Can't open %s: %m\n", NFSD_STABLERESTART); 461 exit(1); 462 } 463 /* This system call will fail for old kernels, but that's ok. */ 464 nfssvc(NFSSVC_BACKUPSTABLE, NULL); 465 if (nfssvc(NFSSVC_STABLERESTART, (caddr_t)&stablefd) < 0) { 466 if (errno == EPERM) { 467 jailed = 0; 468 jailed_size = sizeof(jailed); 469 sysctlbyname("security.jail.jailed", &jailed, 470 &jailed_size, NULL, 0); 471 if (jailed != 0) 472 syslog(LOG_ERR, "nfssvc stablerestart failed: " 473 "allow.nfsd might not be configured"); 474 else 475 syslog(LOG_ERR, "nfssvc stablerestart failed"); 476 } else if (errno == ENXIO) 477 syslog(LOG_ERR, "nfssvc stablerestart failed: is nfsd " 478 "already running?"); 479 else 480 syslog(LOG_ERR, "Can't read stable storage file: %m\n"); 481 exit(1); 482 } 483 nfssvc_addsock = NFSSVC_NFSDADDSOCK; 484 nfssvc_nfsd = NFSSVC_NFSDNFSD | NFSSVC_NEWSTRUCT; 485 486 if (tcpflag) { 487 /* 488 * For TCP mode, we fork once to start the first 489 * kernel nfsd thread. The kernel will add more 490 * threads as needed. 491 */ 492 masterpid = getpid(); 493 pid = fork(); 494 if (pid == -1) { 495 syslog(LOG_ERR, "fork: %m"); 496 nfsd_exit(1); 497 } 498 if (pid) { 499 children[0] = pid; 500 } else { 501 (void)signal(SIGUSR1, child_cleanup); 502 setproctitle("server"); 503 start_server(0, &nfsdargs, vhostname); 504 } 505 } 506 507 (void)signal(SIGUSR1, cleanup); 508 FD_ZERO(&sockbits); 509 510 rpcbregcnt = 0; 511 /* Set up the socket for udp and rpcb register it. */ 512 if (udpflag) { 513 rpcbreg = 0; 514 for (i = 0; i < bindhostc; i++) { 515 memset(&hints, 0, sizeof hints); 516 hints.ai_flags = AI_PASSIVE; 517 hints.ai_family = AF_INET; 518 hints.ai_socktype = SOCK_DGRAM; 519 hints.ai_protocol = IPPROTO_UDP; 520 if (setbindhost(&ai_udp, bindhost[i], hints) == 0) { 521 rpcbreg = 1; 522 rpcbregcnt++; 523 if ((sock = socket(ai_udp->ai_family, 524 ai_udp->ai_socktype, 525 ai_udp->ai_protocol)) < 0) { 526 syslog(LOG_ERR, 527 "can't create udp socket"); 528 nfsd_exit(1); 529 } 530 if (bind(sock, ai_udp->ai_addr, 531 ai_udp->ai_addrlen) < 0) { 532 syslog(LOG_ERR, 533 "can't bind udp addr %s: %m", 534 bindhost[i]); 535 nfsd_exit(1); 536 } 537 freeaddrinfo(ai_udp); 538 addsockargs.sock = sock; 539 addsockargs.name = NULL; 540 addsockargs.namelen = 0; 541 if (nfssvc(nfssvc_addsock, &addsockargs) < 0) { 542 syslog(LOG_ERR, "can't Add UDP socket"); 543 nfsd_exit(1); 544 } 545 (void)close(sock); 546 } 547 } 548 if (rpcbreg == 1) { 549 memset(&hints, 0, sizeof hints); 550 hints.ai_flags = AI_PASSIVE; 551 hints.ai_family = AF_INET; 552 hints.ai_socktype = SOCK_DGRAM; 553 hints.ai_protocol = IPPROTO_UDP; 554 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp); 555 if (ecode != 0) { 556 syslog(LOG_ERR, "getaddrinfo udp: %s", 557 gai_strerror(ecode)); 558 nfsd_exit(1); 559 } 560 nconf_udp = getnetconfigent("udp"); 561 if (nconf_udp == NULL) 562 err(1, "getnetconfigent udp failed"); 563 nb_udp.buf = ai_udp->ai_addr; 564 nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen; 565 if (nfs_minvers == NFS_VER2) 566 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp, 567 &nb_udp)) 568 err(1, "rpcb_set udp failed"); 569 if (nfs_minvers <= NFS_VER3) 570 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp, 571 &nb_udp)) 572 err(1, "rpcb_set udp failed"); 573 freeaddrinfo(ai_udp); 574 } 575 } 576 577 /* Set up the socket for udp6 and rpcb register it. */ 578 if (udpflag && ip6flag) { 579 rpcbreg = 0; 580 for (i = 0; i < bindhostc; i++) { 581 memset(&hints, 0, sizeof hints); 582 hints.ai_flags = AI_PASSIVE; 583 hints.ai_family = AF_INET6; 584 hints.ai_socktype = SOCK_DGRAM; 585 hints.ai_protocol = IPPROTO_UDP; 586 if (setbindhost(&ai_udp6, bindhost[i], hints) == 0) { 587 rpcbreg = 1; 588 rpcbregcnt++; 589 if ((sock = socket(ai_udp6->ai_family, 590 ai_udp6->ai_socktype, 591 ai_udp6->ai_protocol)) < 0) { 592 syslog(LOG_ERR, 593 "can't create udp6 socket"); 594 nfsd_exit(1); 595 } 596 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, 597 &on, sizeof on) < 0) { 598 syslog(LOG_ERR, 599 "can't set v6-only binding for " 600 "udp6 socket: %m"); 601 nfsd_exit(1); 602 } 603 if (bind(sock, ai_udp6->ai_addr, 604 ai_udp6->ai_addrlen) < 0) { 605 syslog(LOG_ERR, 606 "can't bind udp6 addr %s: %m", 607 bindhost[i]); 608 nfsd_exit(1); 609 } 610 freeaddrinfo(ai_udp6); 611 addsockargs.sock = sock; 612 addsockargs.name = NULL; 613 addsockargs.namelen = 0; 614 if (nfssvc(nfssvc_addsock, &addsockargs) < 0) { 615 syslog(LOG_ERR, 616 "can't add UDP6 socket"); 617 nfsd_exit(1); 618 } 619 (void)close(sock); 620 } 621 } 622 if (rpcbreg == 1) { 623 memset(&hints, 0, sizeof hints); 624 hints.ai_flags = AI_PASSIVE; 625 hints.ai_family = AF_INET6; 626 hints.ai_socktype = SOCK_DGRAM; 627 hints.ai_protocol = IPPROTO_UDP; 628 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6); 629 if (ecode != 0) { 630 syslog(LOG_ERR, "getaddrinfo udp6: %s", 631 gai_strerror(ecode)); 632 nfsd_exit(1); 633 } 634 nconf_udp6 = getnetconfigent("udp6"); 635 if (nconf_udp6 == NULL) 636 err(1, "getnetconfigent udp6 failed"); 637 nb_udp6.buf = ai_udp6->ai_addr; 638 nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen; 639 if (nfs_minvers == NFS_VER2) 640 if (!rpcb_set(NFS_PROGRAM, 2, nconf_udp6, 641 &nb_udp6)) 642 err(1, 643 "rpcb_set udp6 failed"); 644 if (nfs_minvers <= NFS_VER3) 645 if (!rpcb_set(NFS_PROGRAM, 3, nconf_udp6, 646 &nb_udp6)) 647 err(1, 648 "rpcb_set udp6 failed"); 649 freeaddrinfo(ai_udp6); 650 } 651 } 652 653 /* Set up the socket for tcp and rpcb register it. */ 654 if (tcpflag) { 655 rpcbreg = 0; 656 for (i = 0; i < bindhostc; i++) { 657 memset(&hints, 0, sizeof hints); 658 hints.ai_flags = AI_PASSIVE; 659 hints.ai_family = AF_INET; 660 hints.ai_socktype = SOCK_STREAM; 661 hints.ai_protocol = IPPROTO_TCP; 662 if (setbindhost(&ai_tcp, bindhost[i], hints) == 0) { 663 rpcbreg = 1; 664 rpcbregcnt++; 665 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 666 0)) < 0) { 667 syslog(LOG_ERR, 668 "can't create tcp socket"); 669 nfsd_exit(1); 670 } 671 if (setsockopt(tcpsock, SOL_SOCKET, 672 SO_REUSEADDR, 673 (char *)&on, sizeof(on)) < 0) 674 syslog(LOG_ERR, 675 "setsockopt SO_REUSEADDR: %m"); 676 if (bind(tcpsock, ai_tcp->ai_addr, 677 ai_tcp->ai_addrlen) < 0) { 678 syslog(LOG_ERR, 679 "can't bind tcp addr %s: %m", 680 bindhost[i]); 681 nfsd_exit(1); 682 } 683 if (listen(tcpsock, -1) < 0) { 684 syslog(LOG_ERR, "listen failed"); 685 nfsd_exit(1); 686 } 687 freeaddrinfo(ai_tcp); 688 FD_SET(tcpsock, &sockbits); 689 maxsock = tcpsock; 690 connect_type_cnt++; 691 } 692 } 693 if (rpcbreg == 1) { 694 memset(&hints, 0, sizeof hints); 695 hints.ai_flags = AI_PASSIVE; 696 hints.ai_family = AF_INET; 697 hints.ai_socktype = SOCK_STREAM; 698 hints.ai_protocol = IPPROTO_TCP; 699 ecode = getaddrinfo(NULL, "nfs", &hints, 700 &ai_tcp); 701 if (ecode != 0) { 702 syslog(LOG_ERR, "getaddrinfo tcp: %s", 703 gai_strerror(ecode)); 704 nfsd_exit(1); 705 } 706 nconf_tcp = getnetconfigent("tcp"); 707 if (nconf_tcp == NULL) 708 err(1, "getnetconfigent tcp failed"); 709 nb_tcp.buf = ai_tcp->ai_addr; 710 nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen; 711 if (nfs_minvers == NFS_VER2) 712 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp, 713 &nb_tcp)) 714 err(1, "rpcb_set tcp failed"); 715 if (nfs_minvers <= NFS_VER3) 716 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp, 717 &nb_tcp)) 718 err(1, "rpcb_set tcp failed"); 719 freeaddrinfo(ai_tcp); 720 } 721 } 722 723 /* Set up the socket for tcp6 and rpcb register it. */ 724 if (tcpflag && ip6flag) { 725 rpcbreg = 0; 726 for (i = 0; i < bindhostc; i++) { 727 memset(&hints, 0, sizeof hints); 728 hints.ai_flags = AI_PASSIVE; 729 hints.ai_family = AF_INET6; 730 hints.ai_socktype = SOCK_STREAM; 731 hints.ai_protocol = IPPROTO_TCP; 732 if (setbindhost(&ai_tcp6, bindhost[i], hints) == 0) { 733 rpcbreg = 1; 734 rpcbregcnt++; 735 if ((tcp6sock = socket(ai_tcp6->ai_family, 736 ai_tcp6->ai_socktype, 737 ai_tcp6->ai_protocol)) < 0) { 738 syslog(LOG_ERR, 739 "can't create tcp6 socket"); 740 nfsd_exit(1); 741 } 742 if (setsockopt(tcp6sock, SOL_SOCKET, 743 SO_REUSEADDR, 744 (char *)&on, sizeof(on)) < 0) 745 syslog(LOG_ERR, 746 "setsockopt SO_REUSEADDR: %m"); 747 if (setsockopt(tcp6sock, IPPROTO_IPV6, 748 IPV6_V6ONLY, &on, sizeof on) < 0) { 749 syslog(LOG_ERR, 750 "can't set v6-only binding for tcp6 " 751 "socket: %m"); 752 nfsd_exit(1); 753 } 754 if (bind(tcp6sock, ai_tcp6->ai_addr, 755 ai_tcp6->ai_addrlen) < 0) { 756 syslog(LOG_ERR, 757 "can't bind tcp6 addr %s: %m", 758 bindhost[i]); 759 nfsd_exit(1); 760 } 761 if (listen(tcp6sock, -1) < 0) { 762 syslog(LOG_ERR, "listen failed"); 763 nfsd_exit(1); 764 } 765 freeaddrinfo(ai_tcp6); 766 FD_SET(tcp6sock, &sockbits); 767 if (maxsock < tcp6sock) 768 maxsock = tcp6sock; 769 connect_type_cnt++; 770 } 771 } 772 if (rpcbreg == 1) { 773 memset(&hints, 0, sizeof hints); 774 hints.ai_flags = AI_PASSIVE; 775 hints.ai_family = AF_INET6; 776 hints.ai_socktype = SOCK_STREAM; 777 hints.ai_protocol = IPPROTO_TCP; 778 ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6); 779 if (ecode != 0) { 780 syslog(LOG_ERR, "getaddrinfo tcp6: %s", 781 gai_strerror(ecode)); 782 nfsd_exit(1); 783 } 784 nconf_tcp6 = getnetconfigent("tcp6"); 785 if (nconf_tcp6 == NULL) 786 err(1, "getnetconfigent tcp6 failed"); 787 nb_tcp6.buf = ai_tcp6->ai_addr; 788 nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen; 789 if (nfs_minvers == NFS_VER2) 790 if (!rpcb_set(NFS_PROGRAM, 2, nconf_tcp6, 791 &nb_tcp6)) 792 err(1, "rpcb_set tcp6 failed"); 793 if (nfs_minvers <= NFS_VER3) 794 if (!rpcb_set(NFS_PROGRAM, 3, nconf_tcp6, 795 &nb_tcp6)) 796 err(1, "rpcb_set tcp6 failed"); 797 freeaddrinfo(ai_tcp6); 798 } 799 } 800 801 if (rpcbregcnt == 0) { 802 syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m"); 803 nfsd_exit(1); 804 } 805 806 if (tcpflag && connect_type_cnt == 0) { 807 syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m"); 808 nfsd_exit(1); 809 } 810 811 setproctitle("master"); 812 /* 813 * We always want a master to have a clean way to shut nfsd down 814 * (with unregistration): if the master is killed, it unregisters and 815 * kills all children. If we run for UDP only (and so do not have to 816 * loop waiting for accept), we instead make the parent 817 * a "server" too. start_server will not return. 818 */ 819 if (!tcpflag) 820 start_server(1, &nfsdargs, vhostname); 821 822 /* 823 * Loop forever accepting connections and passing the sockets 824 * into the kernel for the mounts. 825 */ 826 for (;;) { 827 ready = sockbits; 828 if (connect_type_cnt > 1) { 829 if (select(maxsock + 1, 830 &ready, NULL, NULL, NULL) < 1) { 831 error = errno; 832 if (error == EINTR) 833 continue; 834 syslog(LOG_ERR, "select failed: %m"); 835 nfsd_exit(1); 836 } 837 } 838 for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) { 839 if (FD_ISSET(tcpsock, &ready)) { 840 len = sizeof(peer); 841 if ((msgsock = accept(tcpsock, 842 (struct sockaddr *)&peer, &len)) < 0) { 843 error = errno; 844 syslog(LOG_ERR, "accept failed: %m"); 845 if (error == ECONNABORTED || 846 error == EINTR) 847 continue; 848 nfsd_exit(1); 849 } 850 if (setsockopt(msgsock, SOL_SOCKET, 851 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 852 syslog(LOG_ERR, 853 "setsockopt SO_KEEPALIVE: %m"); 854 addsockargs.sock = msgsock; 855 addsockargs.name = (caddr_t)&peer; 856 addsockargs.namelen = len; 857 nfssvc(nfssvc_addsock, &addsockargs); 858 (void)close(msgsock); 859 } 860 } 861 } 862 } 863 864 static int 865 setbindhost(struct addrinfo **ai, const char *bindhost, struct addrinfo hints) 866 { 867 int ecode; 868 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 869 const char *hostptr; 870 871 if (bindhost == NULL || strcmp("*", bindhost) == 0) 872 hostptr = NULL; 873 else 874 hostptr = bindhost; 875 876 if (hostptr != NULL) { 877 switch (hints.ai_family) { 878 case AF_INET: 879 if (inet_pton(AF_INET, hostptr, host_addr) == 1) { 880 hints.ai_flags = AI_NUMERICHOST; 881 } else { 882 if (inet_pton(AF_INET6, hostptr, 883 host_addr) == 1) 884 return (1); 885 } 886 break; 887 case AF_INET6: 888 if (inet_pton(AF_INET6, hostptr, host_addr) == 1) { 889 hints.ai_flags = AI_NUMERICHOST; 890 } else { 891 if (inet_pton(AF_INET, hostptr, 892 host_addr) == 1) 893 return (1); 894 } 895 break; 896 default: 897 break; 898 } 899 } 900 901 ecode = getaddrinfo(hostptr, "nfs", &hints, ai); 902 if (ecode != 0) { 903 syslog(LOG_ERR, "getaddrinfo %s: %s", bindhost, 904 gai_strerror(ecode)); 905 return (1); 906 } 907 return (0); 908 } 909 910 static void 911 set_nfsdcnt(int proposed) 912 { 913 914 if (proposed < 1) { 915 warnx("nfsd count too low %d; reset to %d", proposed, 916 DEFNFSDCNT); 917 nfsdcnt = DEFNFSDCNT; 918 } else if (proposed > MAXNFSDCNT) { 919 warnx("nfsd count too high %d; truncated to %d", proposed, 920 MAXNFSDCNT); 921 nfsdcnt = MAXNFSDCNT; 922 } else 923 nfsdcnt = proposed; 924 nfsdcnt_set = 1; 925 } 926 927 static void 928 usage(void) 929 { 930 (void)fprintf(stderr, "%s", getopt_usage); 931 exit(1); 932 } 933 934 static void 935 nonfs(__unused int signo) 936 { 937 syslog(LOG_ERR, "missing system call: NFS not available"); 938 } 939 940 static void 941 reapchild(__unused int signo) 942 { 943 pid_t pid; 944 int i; 945 946 while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) { 947 for (i = 0; i < nfsdcnt; i++) 948 if (pid == children[i]) 949 children[i] = -1; 950 } 951 } 952 953 static void 954 unregistration(void) 955 { 956 if ((nfs_minvers == NFS_VER2 && !rpcb_unset(NFS_PROGRAM, 2, NULL)) || 957 (nfs_minvers <= NFS_VER3 && !rpcb_unset(NFS_PROGRAM, 3, NULL))) 958 syslog(LOG_ERR, "rpcb_unset failed"); 959 } 960 961 static void 962 killchildren(void) 963 { 964 int i; 965 966 for (i = 0; i < nfsdcnt; i++) { 967 if (children[i] > 0) 968 kill(children[i], SIGKILL); 969 } 970 } 971 972 /* 973 * Cleanup master after SIGUSR1. 974 */ 975 static void 976 cleanup(__unused int signo) 977 { 978 nfsd_exit(0); 979 } 980 981 /* 982 * Cleanup child after SIGUSR1. 983 */ 984 static void 985 child_cleanup(__unused int signo) 986 { 987 exit(0); 988 } 989 990 static void 991 nfsd_exit(int status) 992 { 993 killchildren(); 994 unregistration(); 995 exit(status); 996 } 997 998 static int 999 get_tuned_nfsdcount(void) 1000 { 1001 int ncpu, error, tuned_nfsdcnt; 1002 size_t ncpu_size; 1003 1004 ncpu_size = sizeof(ncpu); 1005 error = sysctlbyname("hw.ncpu", &ncpu, &ncpu_size, NULL, 0); 1006 if (error) { 1007 warnx("sysctlbyname(hw.ncpu) failed defaulting to %d nfs servers", 1008 DEFNFSDCNT); 1009 tuned_nfsdcnt = DEFNFSDCNT; 1010 } else { 1011 tuned_nfsdcnt = ncpu * 8; 1012 } 1013 return tuned_nfsdcnt; 1014 } 1015 1016 static void 1017 start_server(int master, struct nfsd_nfsd_args *nfsdargp, const char *vhost) 1018 { 1019 char principal[MAXHOSTNAMELEN + 5]; 1020 int status, error; 1021 char hostname[MAXHOSTNAMELEN + 1], *cp; 1022 struct addrinfo *aip, hints; 1023 1024 status = 0; 1025 if (vhost == NULL) 1026 gethostname(hostname, sizeof (hostname)); 1027 else 1028 strlcpy(hostname, vhost, sizeof (hostname)); 1029 snprintf(principal, sizeof (principal), "nfs@%s", hostname); 1030 if ((cp = strchr(hostname, '.')) == NULL || 1031 *(cp + 1) == '\0') { 1032 /* If not fully qualified, try getaddrinfo() */ 1033 memset((void *)&hints, 0, sizeof (hints)); 1034 hints.ai_flags = AI_CANONNAME; 1035 error = getaddrinfo(hostname, NULL, &hints, &aip); 1036 if (error == 0) { 1037 if (aip->ai_canonname != NULL && 1038 (cp = strchr(aip->ai_canonname, '.')) != 1039 NULL && *(cp + 1) != '\0') 1040 snprintf(principal, sizeof (principal), 1041 "nfs@%s", aip->ai_canonname); 1042 freeaddrinfo(aip); 1043 } 1044 } 1045 nfsdargp->principal = principal; 1046 1047 if (nfsdcnt_set) 1048 nfsdargp->minthreads = nfsdargp->maxthreads = nfsdcnt; 1049 else { 1050 nfsdargp->minthreads = minthreads_set ? minthreads : get_tuned_nfsdcount(); 1051 nfsdargp->maxthreads = maxthreads_set ? maxthreads : nfsdargp->minthreads; 1052 if (nfsdargp->maxthreads < nfsdargp->minthreads) 1053 nfsdargp->maxthreads = nfsdargp->minthreads; 1054 } 1055 error = nfssvc(nfssvc_nfsd, nfsdargp); 1056 if (error < 0 && errno == EAUTH) { 1057 /* 1058 * This indicates that it could not register the 1059 * rpcsec_gss credentials, usually because the 1060 * gssd daemon isn't running. 1061 * (only the experimental server with nfsv4) 1062 */ 1063 syslog(LOG_ERR, "No gssd, using AUTH_SYS only"); 1064 principal[0] = '\0'; 1065 error = nfssvc(nfssvc_nfsd, nfsdargp); 1066 } 1067 if (error < 0) { 1068 if (errno == ENXIO) { 1069 syslog(LOG_ERR, "Bad -p option, cannot run"); 1070 if (masterpid != 0 && master == 0) 1071 kill(masterpid, SIGUSR1); 1072 } else 1073 syslog(LOG_ERR, "nfssvc: %m"); 1074 status = 1; 1075 } 1076 if (master) 1077 nfsd_exit(status); 1078 else 1079 exit(status); 1080 } 1081 1082 /* 1083 * Open the stable restart file and return the file descriptor for it. 1084 */ 1085 static void 1086 open_stable(int *stable_fdp, int *backup_fdp) 1087 { 1088 int stable_fd, backup_fd = -1, ret; 1089 struct stat st, backup_st; 1090 1091 /* Open and stat the stable restart file. */ 1092 stable_fd = open(NFSD_STABLERESTART, O_RDWR, 0); 1093 if (stable_fd < 0) 1094 stable_fd = open(NFSD_STABLERESTART, O_RDWR | O_CREAT, 0600); 1095 if (stable_fd >= 0) { 1096 ret = fstat(stable_fd, &st); 1097 if (ret < 0) { 1098 close(stable_fd); 1099 stable_fd = -1; 1100 } 1101 } 1102 1103 /* Open and stat the backup stable restart file. */ 1104 if (stable_fd >= 0) { 1105 backup_fd = open(NFSD_STABLEBACKUP, O_RDWR, 0); 1106 if (backup_fd < 0) 1107 backup_fd = open(NFSD_STABLEBACKUP, O_RDWR | O_CREAT, 1108 0600); 1109 if (backup_fd >= 0) { 1110 ret = fstat(backup_fd, &backup_st); 1111 if (ret < 0) { 1112 close(backup_fd); 1113 backup_fd = -1; 1114 } 1115 } 1116 if (backup_fd < 0) { 1117 close(stable_fd); 1118 stable_fd = -1; 1119 } 1120 } 1121 1122 *stable_fdp = stable_fd; 1123 *backup_fdp = backup_fd; 1124 if (stable_fd < 0) 1125 return; 1126 1127 /* Sync up the 2 files, as required. */ 1128 if (st.st_size > 0) 1129 copy_stable(stable_fd, backup_fd); 1130 else if (backup_st.st_size > 0) 1131 copy_stable(backup_fd, stable_fd); 1132 } 1133 1134 /* 1135 * Copy the stable restart file to the backup or vice versa. 1136 */ 1137 static void 1138 copy_stable(int from_fd, int to_fd) 1139 { 1140 int cnt, ret; 1141 static char buf[1024]; 1142 1143 ret = lseek(from_fd, (off_t)0, SEEK_SET); 1144 if (ret >= 0) 1145 ret = lseek(to_fd, (off_t)0, SEEK_SET); 1146 if (ret >= 0) 1147 ret = ftruncate(to_fd, (off_t)0); 1148 if (ret >= 0) 1149 do { 1150 cnt = read(from_fd, buf, 1024); 1151 if (cnt > 0) 1152 ret = write(to_fd, buf, cnt); 1153 else if (cnt < 0) 1154 ret = cnt; 1155 } while (cnt > 0 && ret >= 0); 1156 if (ret >= 0) 1157 ret = fsync(to_fd); 1158 if (ret < 0) 1159 syslog(LOG_ERR, "stable restart copy failure: %m"); 1160 } 1161 1162 /* 1163 * Back up the stable restart file when indicated by the kernel. 1164 */ 1165 static void 1166 backup_stable(__unused int signo) 1167 { 1168 1169 if (stablefd >= 0) 1170 copy_stable(stablefd, backupfd); 1171 } 1172 1173 /* 1174 * Parse the pNFS string and extract the DS servers and ports numbers. 1175 */ 1176 static void 1177 parse_dsserver(const char *optionarg, struct nfsd_nfsd_args *nfsdargp) 1178 { 1179 char *cp, *cp2, *dsaddr, *dshost, *dspath, *dsvol, nfsprt[9]; 1180 char *mdspath, *mdsp, ip6[INET6_ADDRSTRLEN]; 1181 const char *ad; 1182 int ecode; 1183 u_int adsiz, dsaddrcnt, dshostcnt, dspathcnt, hostsiz, pathsiz; 1184 u_int mdspathcnt; 1185 size_t dsaddrsiz, dshostsiz, dspathsiz, nfsprtsiz, mdspathsiz; 1186 struct addrinfo hints, *ai_tcp, *res; 1187 struct sockaddr_in sin; 1188 struct sockaddr_in6 sin6; 1189 1190 cp = strdup(optionarg); 1191 if (cp == NULL) 1192 errx(1, "Out of memory"); 1193 1194 /* Now, do the host names. */ 1195 dspathsiz = 1024; 1196 dspathcnt = 0; 1197 dspath = malloc(dspathsiz); 1198 if (dspath == NULL) 1199 errx(1, "Out of memory"); 1200 dshostsiz = 1024; 1201 dshostcnt = 0; 1202 dshost = malloc(dshostsiz); 1203 if (dshost == NULL) 1204 errx(1, "Out of memory"); 1205 dsaddrsiz = 1024; 1206 dsaddrcnt = 0; 1207 dsaddr = malloc(dsaddrsiz); 1208 if (dsaddr == NULL) 1209 errx(1, "Out of memory"); 1210 mdspathsiz = 1024; 1211 mdspathcnt = 0; 1212 mdspath = malloc(mdspathsiz); 1213 if (mdspath == NULL) 1214 errx(1, "Out of memory"); 1215 1216 /* Put the NFS port# in "." form. */ 1217 snprintf(nfsprt, 9, ".%d.%d", 2049 >> 8, 2049 & 0xff); 1218 nfsprtsiz = strlen(nfsprt); 1219 1220 ai_tcp = NULL; 1221 /* Loop around for each DS server name. */ 1222 do { 1223 cp2 = strchr(cp, ','); 1224 if (cp2 != NULL) { 1225 /* Not the last DS in the list. */ 1226 *cp2++ = '\0'; 1227 if (*cp2 == '\0') 1228 usage(); 1229 } 1230 1231 dsvol = strchr(cp, ':'); 1232 if (dsvol == NULL || *(dsvol + 1) == '\0') 1233 usage(); 1234 *dsvol++ = '\0'; 1235 1236 /* Optional path for MDS file system to be stored on DS. */ 1237 mdsp = strchr(dsvol, '#'); 1238 if (mdsp != NULL) { 1239 if (*(mdsp + 1) == '\0' || mdsp <= dsvol) 1240 usage(); 1241 *mdsp++ = '\0'; 1242 } 1243 1244 /* Append this pathname to dspath. */ 1245 pathsiz = strlen(dsvol); 1246 if (dspathcnt + pathsiz + 1 > dspathsiz) { 1247 dspathsiz *= 2; 1248 dspath = realloc(dspath, dspathsiz); 1249 if (dspath == NULL) 1250 errx(1, "Out of memory"); 1251 } 1252 strcpy(&dspath[dspathcnt], dsvol); 1253 dspathcnt += pathsiz + 1; 1254 1255 /* Append this pathname to mdspath. */ 1256 if (mdsp != NULL) 1257 pathsiz = strlen(mdsp); 1258 else 1259 pathsiz = 0; 1260 if (mdspathcnt + pathsiz + 1 > mdspathsiz) { 1261 mdspathsiz *= 2; 1262 mdspath = realloc(mdspath, mdspathsiz); 1263 if (mdspath == NULL) 1264 errx(1, "Out of memory"); 1265 } 1266 if (mdsp != NULL) 1267 strcpy(&mdspath[mdspathcnt], mdsp); 1268 else 1269 mdspath[mdspathcnt] = '\0'; 1270 mdspathcnt += pathsiz + 1; 1271 1272 if (ai_tcp != NULL) 1273 freeaddrinfo(ai_tcp); 1274 1275 /* Get the fully qualified domain name and IP address. */ 1276 memset(&hints, 0, sizeof(hints)); 1277 hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; 1278 hints.ai_family = PF_UNSPEC; 1279 hints.ai_socktype = SOCK_STREAM; 1280 hints.ai_protocol = IPPROTO_TCP; 1281 ecode = getaddrinfo(cp, NULL, &hints, &ai_tcp); 1282 if (ecode != 0) 1283 err(1, "getaddrinfo pnfs: %s %s", cp, 1284 gai_strerror(ecode)); 1285 ad = NULL; 1286 for (res = ai_tcp; res != NULL; res = res->ai_next) { 1287 if (res->ai_addr->sa_family == AF_INET) { 1288 if (res->ai_addrlen < sizeof(sin)) 1289 err(1, "getaddrinfo() returned " 1290 "undersized IPv4 address"); 1291 /* 1292 * Mips cares about sockaddr_in alignment, 1293 * so copy the address. 1294 */ 1295 memcpy(&sin, res->ai_addr, sizeof(sin)); 1296 ad = inet_ntoa(sin.sin_addr); 1297 break; 1298 } else if (res->ai_family == AF_INET6) { 1299 if (res->ai_addrlen < sizeof(sin6)) 1300 err(1, "getaddrinfo() returned " 1301 "undersized IPv6 address"); 1302 /* 1303 * Mips cares about sockaddr_in6 alignment, 1304 * so copy the address. 1305 */ 1306 memcpy(&sin6, res->ai_addr, sizeof(sin6)); 1307 ad = inet_ntop(AF_INET6, &sin6.sin6_addr, ip6, 1308 sizeof(ip6)); 1309 1310 /* 1311 * XXX 1312 * Since a link local address will only 1313 * work if the client and DS are in the 1314 * same scope zone, only use it if it is 1315 * the only address. 1316 */ 1317 if (ad != NULL && 1318 !IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) 1319 break; 1320 } 1321 } 1322 if (ad == NULL) 1323 err(1, "No IP address for %s", cp); 1324 1325 /* Append this address to dsaddr. */ 1326 adsiz = strlen(ad); 1327 if (dsaddrcnt + adsiz + nfsprtsiz + 1 > dsaddrsiz) { 1328 dsaddrsiz *= 2; 1329 dsaddr = realloc(dsaddr, dsaddrsiz); 1330 if (dsaddr == NULL) 1331 errx(1, "Out of memory"); 1332 } 1333 strcpy(&dsaddr[dsaddrcnt], ad); 1334 strcat(&dsaddr[dsaddrcnt], nfsprt); 1335 dsaddrcnt += adsiz + nfsprtsiz + 1; 1336 1337 /* Append this hostname to dshost. */ 1338 hostsiz = strlen(ai_tcp->ai_canonname); 1339 if (dshostcnt + hostsiz + 1 > dshostsiz) { 1340 dshostsiz *= 2; 1341 dshost = realloc(dshost, dshostsiz); 1342 if (dshost == NULL) 1343 errx(1, "Out of memory"); 1344 } 1345 strcpy(&dshost[dshostcnt], ai_tcp->ai_canonname); 1346 dshostcnt += hostsiz + 1; 1347 1348 cp = cp2; 1349 } while (cp != NULL); 1350 1351 nfsdargp->addr = dsaddr; 1352 nfsdargp->addrlen = dsaddrcnt; 1353 nfsdargp->dnshost = dshost; 1354 nfsdargp->dnshostlen = dshostcnt; 1355 nfsdargp->dspath = dspath; 1356 nfsdargp->dspathlen = dspathcnt; 1357 nfsdargp->mdspath = mdspath; 1358 nfsdargp->mdspathlen = mdspathcnt; 1359 freeaddrinfo(ai_tcp); 1360 } 1361 1362