nfsd.c revision 1.16
1 /* $NetBSD: nfsd.c,v 1.16 1995/03/18 14:59:00 cgd Exp $ */ 2 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #ifndef lint 40 static char copyright[] = 41 "@(#) Copyright (c) 1989, 1993, 1994\n\ 42 The Regents of the University of California. All rights reserved.\n"; 43 #endif not lint 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)nfsd.c 8.7 (Berkeley) 2/22/94"; 48 #else 49 static char rcsid[] = "$NetBSD: nfsd.c,v 1.16 1995/03/18 14:59:00 cgd Exp $"; 50 #endif 51 #endif not lint 52 53 #include <sys/param.h> 54 #include <sys/syslog.h> 55 #include <sys/ioctl.h> 56 #include <sys/stat.h> 57 #include <sys/wait.h> 58 #include <sys/uio.h> 59 #include <sys/ucred.h> 60 #include <sys/mount.h> 61 #include <sys/socket.h> 62 #include <sys/socketvar.h> 63 64 #include <rpc/rpc.h> 65 #include <rpc/pmap_clnt.h> 66 #include <rpc/pmap_prot.h> 67 68 #ifdef ISO 69 #include <netiso/iso.h> 70 #endif 71 #include <nfs/rpcv2.h> 72 #include <nfs/nfsv2.h> 73 #include <nfs/nfs.h> 74 75 #ifdef KERBEROS 76 #include <kerberosIV/des.h> 77 #include <kerberosIV/krb.h> 78 #endif 79 80 #include <err.h> 81 #include <errno.h> 82 #include <fcntl.h> 83 #include <grp.h> 84 #include <pwd.h> 85 #include <signal.h> 86 #include <stdio.h> 87 #include <stdlib.h> 88 #include <strings.h> 89 #include <unistd.h> 90 91 /* Global defs */ 92 #ifdef DEBUG 93 #define syslog(e, s) fprintf(stderr,(s)) 94 int debug = 1; 95 #else 96 int debug = 0; 97 #endif 98 99 struct nfsd_srvargs nsd; 100 101 #ifdef KERBEROS 102 char lnam[ANAME_SZ]; 103 KTEXT_ST kt; 104 AUTH_DAT auth; 105 char inst[INST_SZ]; 106 #endif 107 108 void nonfs __P((int)); 109 void reapchild __P((int)); 110 void usage __P((void)); 111 112 /* 113 * Nfs server daemon mostly just a user context for nfssvc() 114 * 115 * 1 - do file descriptor and signal cleanup 116 * 2 - fork the nfsd(s) 117 * 3 - create server socket(s) 118 * 4 - register socket with portmap 119 * 120 * For connectionless protocols, just pass the socket into the kernel via. 121 * nfssvc(). 122 * For connection based sockets, loop doing accepts. When you get a new 123 * socket from accept, pass the msgsock into the kernel via. nfssvc(). 124 * The arguments are: 125 * -c - support iso cltp clients 126 * -r - reregister with portmapper 127 * -t - support tcp nfs clients 128 * -u - support udp nfs clients 129 * followed by "n" which is the number of nfsds' to fork off 130 */ 131 int 132 main(argc, argv, envp) 133 int argc; 134 char *argv[], *envp[]; 135 { 136 extern int optind; 137 struct group *grp; 138 struct nfsd_args nfsdargs; 139 struct passwd *pwd; 140 struct ucred *cr; 141 struct sockaddr_in inetaddr, inetpeer; 142 #ifdef ISO 143 struct sockaddr_iso isoaddr, isopeer; 144 #endif 145 fd_set ready, sockbits; 146 int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock; 147 int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock; 148 int tp4cnt, tp4flag, tp4sock, tpipcnt, tpipflag, tpipsock, udpflag; 149 char *cp, **cpp; 150 151 #define MAXNFSDCNT 20 152 #define DEFNFSDCNT 4 153 nfsdcnt = DEFNFSDCNT; 154 cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0; 155 tpipflag = udpflag = 0; 156 #ifdef ISO 157 #define GETOPT "cn:rtu" 158 #define USAGE "[-crtu] [-n num_servers]" 159 #else 160 #define GETOPT "n:rtu" 161 #define USAGE "[-rtu] [-n num_servers]" 162 #endif 163 while ((ch = getopt(argc, argv, GETOPT)) != EOF) 164 switch (ch) { 165 case 'n': 166 nfsdcnt = atoi(optarg); 167 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) { 168 warnx("nfsd count %d; reset to %d", DEFNFSDCNT); 169 nfsdcnt = DEFNFSDCNT; 170 } 171 break; 172 case 'r': 173 reregister = 1; 174 break; 175 case 't': 176 tcpflag = 1; 177 break; 178 case 'u': 179 udpflag = 1; 180 break; 181 #ifdef ISO 182 case 'c': 183 cltpflag = 1; 184 break; 185 #ifdef notyet 186 case 'i': 187 tp4cnt = 1; 188 break; 189 case 'p': 190 tpipcnt = 1; 191 break; 192 #endif /* notyet */ 193 #endif /* ISO */ 194 default: 195 case '?': 196 usage(); 197 }; 198 argv += optind; 199 argc -= optind; 200 201 /* 202 * XXX 203 * Backward compatibility, trailing number is the count of daemons. 204 */ 205 if (argc > 1) 206 usage(); 207 if (argc == 1) { 208 nfsdcnt = atoi(argv[0]); 209 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) { 210 warnx("nfsd count %d; reset to %d", DEFNFSDCNT); 211 nfsdcnt = DEFNFSDCNT; 212 } 213 } 214 215 if (debug == 0) { 216 daemon(0, 0); 217 (void)signal(SIGHUP, SIG_IGN); 218 (void)signal(SIGINT, SIG_IGN); 219 (void)signal(SIGQUIT, SIG_IGN); 220 (void)signal(SIGSYS, nonfs); 221 (void)signal(SIGTERM, SIG_IGN); 222 } 223 (void)signal(SIGCHLD, reapchild); 224 225 if (reregister) { 226 if (udpflag && 227 !pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) 228 err(1, "can't register with portmap for UDP."); 229 if (tcpflag && 230 !pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) 231 err(1, "can't register with portmap for TCP."); 232 exit(0); 233 } 234 openlog("nfsd:", LOG_PID, LOG_DAEMON); 235 236 for (i = 0; i < nfsdcnt; i++) { 237 switch (fork()) { 238 case -1: 239 syslog(LOG_ERR, "fork: %m"); 240 exit (1); 241 case 0: 242 break; 243 default: 244 continue; 245 } 246 247 setproctitle("server"); 248 nfssvc_flag = NFSSVC_NFSD; 249 nsd.nsd_nfsd = NULL; 250 #ifdef KERBEROS 251 nsd.nsd_authstr = (char *)kt.dat; 252 #endif 253 while (nfssvc(nfssvc_flag, &nsd) < 0) { 254 if (errno != ENEEDAUTH) { 255 syslog(LOG_ERR, "nfssvc: %m"); 256 exit(1); 257 } 258 nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL; 259 #ifdef KERBEROS 260 kt.length = nsd.nsd_authlen; 261 kt.mbz = 0; 262 (void)strcpy(inst, "*"); 263 if (krb_rd_req(&kt, "rcmd", 264 inst, nsd.nsd_haddr, &auth, "") == RD_AP_OK && 265 krb_kntoln(&auth, lnam) == KSUCCESS && 266 (pwd = getpwnam(lnam)) != NULL) { 267 cr = &nsd.nsd_cr; 268 cr->cr_uid = pwd->pw_uid; 269 cr->cr_groups[0] = pwd->pw_gid; 270 cr->cr_ngroups = 1; 271 setgrent(); 272 while ((grp = getgrent()) != NULL) { 273 if (grp->gr_gid == cr->cr_groups[0]) 274 continue; 275 for (cpp = grp->gr_mem; 276 *cpp != NULL; ++cpp) 277 if (!strcmp(*cpp, lnam)) 278 break; 279 if (*cpp == NULL) 280 continue; 281 cr->cr_groups[cr->cr_ngroups++] 282 = grp->gr_gid; 283 if (cr->cr_ngroups == NGROUPS) 284 break; 285 } 286 endgrent(); 287 nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN; 288 } 289 #endif /* KERBEROS */ 290 } 291 exit(0); 292 } 293 294 /* If we are serving udp, set up the socket. */ 295 if (udpflag) { 296 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 297 syslog(LOG_ERR, "can't create udp socket"); 298 exit(1); 299 } 300 inetaddr.sin_family = AF_INET; 301 inetaddr.sin_addr.s_addr = INADDR_ANY; 302 inetaddr.sin_port = htons(NFS_PORT); 303 inetaddr.sin_len = sizeof(inetaddr); 304 if (bind(sock, 305 (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) { 306 syslog(LOG_ERR, "can't bind udp addr"); 307 exit(1); 308 } 309 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) { 310 syslog(LOG_ERR, "can't register with udp portmap"); 311 exit(1); 312 } 313 nfsdargs.sock = sock; 314 nfsdargs.name = NULL; 315 nfsdargs.namelen = 0; 316 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) { 317 syslog(LOG_ERR, "can't Add UDP socket"); 318 exit(1); 319 } 320 (void)close(sock); 321 } 322 323 #ifdef ISO 324 /* If we are serving cltp, set up the socket. */ 325 if (cltpflag) { 326 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) { 327 syslog(LOG_ERR, "can't create cltp socket"); 328 exit(1); 329 } 330 memset(&isoaddr, 0, sizeof(isoaddr)); 331 isoaddr.siso_family = AF_ISO; 332 isoaddr.siso_tlen = 2; 333 cp = TSEL(&isoaddr); 334 *cp++ = (NFS_PORT >> 8); 335 *cp = (NFS_PORT & 0xff); 336 isoaddr.siso_len = sizeof(isoaddr); 337 if (bind(sock, 338 (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) { 339 syslog(LOG_ERR, "can't bind cltp addr"); 340 exit(1); 341 } 342 #ifdef notyet 343 /* 344 * XXX 345 * Someday this should probably use "rpcbind", the son of 346 * portmap. 347 */ 348 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) { 349 syslog(LOG_ERR, "can't register with udp portmap"); 350 exit(1); 351 } 352 #endif /* notyet */ 353 nfsdargs.sock = sock; 354 nfsdargs.name = NULL; 355 nfsdargs.namelen = 0; 356 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) { 357 syslog(LOG_ERR, "can't add UDP socket"); 358 exit(1); 359 } 360 close(sock); 361 } 362 #endif /* ISO */ 363 364 /* Now set up the master server socket waiting for tcp connections. */ 365 on = 1; 366 FD_ZERO(&sockbits); 367 connect_type_cnt = 0; 368 if (tcpflag) { 369 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 370 syslog(LOG_ERR, "can't create tcp socket"); 371 exit(1); 372 } 373 if (setsockopt(tcpsock, 374 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 375 syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 376 inetaddr.sin_family = AF_INET; 377 inetaddr.sin_addr.s_addr = INADDR_ANY; 378 inetaddr.sin_port = htons(NFS_PORT); 379 inetaddr.sin_len = sizeof(inetaddr); 380 if (bind(tcpsock, 381 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) { 382 syslog(LOG_ERR, "can't bind tcp addr"); 383 exit(1); 384 } 385 if (listen(tcpsock, 5) < 0) { 386 syslog(LOG_ERR, "listen failed"); 387 exit(1); 388 } 389 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) { 390 syslog(LOG_ERR, "can't register tcp with portmap"); 391 exit(1); 392 } 393 FD_SET(tcpsock, &sockbits); 394 maxsock = tcpsock; 395 connect_type_cnt++; 396 } 397 398 #ifdef notyet 399 /* Now set up the master server socket waiting for tp4 connections. */ 400 if (tp4flag) { 401 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) { 402 syslog(LOG_ERR, "can't create tp4 socket"); 403 exit(1); 404 } 405 if (setsockopt(tp4sock, 406 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 407 syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 408 memset(&isoaddr, 0, sizeof(isoaddr)); 409 isoaddr.siso_family = AF_ISO; 410 isoaddr.siso_tlen = 2; 411 cp = TSEL(&isoaddr); 412 *cp++ = (NFS_PORT >> 8); 413 *cp = (NFS_PORT & 0xff); 414 isoaddr.siso_len = sizeof(isoaddr); 415 if (bind(tp4sock, 416 (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) { 417 syslog(LOG_ERR, "can't bind tp4 addr"); 418 exit(1); 419 } 420 if (listen(tp4sock, 5) < 0) { 421 syslog(LOG_ERR, "listen failed"); 422 exit(1); 423 } 424 /* 425 * XXX 426 * Someday this should probably use "rpcbind", the son of 427 * portmap. 428 */ 429 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) { 430 syslog(LOG_ERR, "can't register tcp with portmap"); 431 exit(1); 432 } 433 FD_SET(tp4sock, &sockbits); 434 maxsock = tp4sock; 435 connect_type_cnt++; 436 } 437 438 /* Now set up the master server socket waiting for tpip connections. */ 439 if (tpipflag) { 440 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) { 441 syslog(LOG_ERR, "can't create tpip socket"); 442 exit(1); 443 } 444 if (setsockopt(tpipsock, 445 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 446 syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 447 inetaddr.sin_family = AF_INET; 448 inetaddr.sin_addr.s_addr = INADDR_ANY; 449 inetaddr.sin_port = htons(NFS_PORT); 450 inetaddr.sin_len = sizeof(inetaddr); 451 if (bind(tpipsock, 452 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) { 453 syslog(LOG_ERR, "can't bind tcp addr"); 454 exit(1); 455 } 456 if (listen(tpipsock, 5) < 0) { 457 syslog(LOG_ERR, "listen failed"); 458 exit(1); 459 } 460 /* 461 * XXX 462 * Someday this should probably use "rpcbind", the son of 463 * portmap. 464 */ 465 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) { 466 syslog(LOG_ERR, "can't register tcp with portmap"); 467 exit(1); 468 } 469 FD_SET(tpipsock, &sockbits); 470 maxsock = tpipsock; 471 connect_type_cnt++; 472 } 473 #endif /* notyet */ 474 475 if (connect_type_cnt == 0) 476 exit(0); 477 478 setproctitle("master"); 479 480 /* 481 * Loop forever accepting connections and passing the sockets 482 * into the kernel for the mounts. 483 */ 484 for (;;) { 485 ready = sockbits; 486 if (connect_type_cnt > 1) { 487 if (select(maxsock + 1, 488 &ready, NULL, NULL, NULL) < 1) { 489 syslog(LOG_ERR, "select failed: %m"); 490 exit(1); 491 } 492 } 493 if (tcpflag && FD_ISSET(tcpsock, &ready)) { 494 len = sizeof(inetpeer); 495 if ((msgsock = accept(tcpsock, 496 (struct sockaddr *)&inetpeer, &len)) < 0) { 497 syslog(LOG_ERR, "accept failed: %m"); 498 exit(1); 499 } 500 memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero)); 501 if (setsockopt(msgsock, SOL_SOCKET, 502 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 503 syslog(LOG_ERR, 504 "setsockopt SO_KEEPALIVE: %m"); 505 nfsdargs.sock = msgsock; 506 nfsdargs.name = (caddr_t)&inetpeer; 507 nfsdargs.namelen = sizeof(inetpeer); 508 nfssvc(NFSSVC_ADDSOCK, &nfsdargs); 509 (void)close(msgsock); 510 } 511 #ifdef notyet 512 if (tp4flag && FD_ISSET(tp4sock, &ready)) { 513 len = sizeof(isopeer); 514 if ((msgsock = accept(tp4sock, 515 (struct sockaddr *)&isopeer, &len)) < 0) { 516 syslog(LOG_ERR, "accept failed: %m"); 517 exit(1); 518 } 519 if (setsockopt(msgsock, SOL_SOCKET, 520 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 521 syslog(LOG_ERR, 522 "setsockopt SO_KEEPALIVE: %m"); 523 nfsdargs.sock = msgsock; 524 nfsdargs.name = (caddr_t)&isopeer; 525 nfsdargs.namelen = len; 526 nfssvc(NFSSVC_ADDSOCK, &nfsdargs); 527 (void)close(msgsock); 528 } 529 if (tpipflag && FD_ISSET(tpipsock, &ready)) { 530 len = sizeof(inetpeer); 531 if ((msgsock = accept(tpipsock, 532 (struct sockaddr *)&inetpeer, &len)) < 0) { 533 syslog(LOG_ERR, "Accept failed: %m"); 534 exit(1); 535 } 536 if (setsockopt(msgsock, SOL_SOCKET, 537 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 538 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m"); 539 nfsdargs.sock = msgsock; 540 nfsdargs.name = (caddr_t)&inetpeer; 541 nfsdargs.namelen = len; 542 nfssvc(NFSSVC_ADDSOCK, &nfsdargs); 543 (void)close(msgsock); 544 } 545 #endif /* notyet */ 546 } 547 } 548 549 void 550 usage() 551 { 552 553 (void)fprintf(stderr, "usage: nfsd %s\n", USAGE); 554 exit(1); 555 } 556 557 void 558 nonfs(signo) 559 int signo; 560 { 561 562 syslog(LOG_ERR, "missing system call: NFS not available."); 563 } 564 565 void 566 reapchild(signo) 567 int signo; 568 { 569 570 while (wait3((int *)0, WNOHANG, (struct rusage *)0) > 0); 571 } 572
Indexes created Tue Sep 23 20:09:58 GMT 2025