nfsd.c revision 1.11
1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1989, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif not lint 42 43 #ifndef lint 44 /*static char sccsid[] = "from: @(#)nfsd.c 8.7 (Berkeley) 2/22/94";*/ 45 static char *rcsid = "$Id: nfsd.c,v 1.11 1994/06/08 19:31:49 mycroft Exp $"; 46 #endif not lint 47 48 #include <sys/param.h> 49 #include <sys/syslog.h> 50 #include <sys/ioctl.h> 51 #include <sys/stat.h> 52 #include <sys/wait.h> 53 #include <sys/uio.h> 54 #include <sys/ucred.h> 55 #include <sys/mount.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 59 #include <rpc/rpc.h> 60 #include <rpc/pmap_clnt.h> 61 #include <rpc/pmap_prot.h> 62 63 #ifdef ISO 64 #include <netiso/iso.h> 65 #endif 66 #include <nfs/rpcv2.h> 67 #include <nfs/nfsv2.h> 68 #include <nfs/nfs.h> 69 70 #ifdef KERBEROS 71 #include <kerberosIV/des.h> 72 #include <kerberosIV/krb.h> 73 #endif 74 75 #include <err.h> 76 #include <errno.h> 77 #include <fcntl.h> 78 #include <grp.h> 79 #include <pwd.h> 80 #include <signal.h> 81 #include <stdio.h> 82 #include <stdlib.h> 83 #include <strings.h> 84 #include <unistd.h> 85 86 /* Global defs */ 87 #ifdef DEBUG 88 #define syslog(e, s) fprintf(stderr,(s)) 89 int debug = 1; 90 #else 91 int debug = 0; 92 #endif 93 94 struct nfsd_srvargs nsd; 95 96 #ifdef KERBEROS 97 char lnam[ANAME_SZ]; 98 KTEXT_ST kt; 99 AUTH_DAT auth; 100 char inst[INST_SZ]; 101 #endif 102 103 void nonfs __P((int)); 104 void reapchild __P((int)); 105 void usage __P((void)); 106 107 /* 108 * Nfs server daemon mostly just a user context for nfssvc() 109 * 110 * 1 - do file descriptor and signal cleanup 111 * 2 - fork the nfsd(s) 112 * 3 - create server socket(s) 113 * 4 - register socket with portmap 114 * 115 * For connectionless protocols, just pass the socket into the kernel via. 116 * nfssvc(). 117 * For connection based sockets, loop doing accepts. When you get a new 118 * socket from accept, pass the msgsock into the kernel via. nfssvc(). 119 * The arguments are: 120 * -c - support iso cltp clients 121 * -r - reregister with portmapper 122 * -t - support tcp nfs clients 123 * -u - support udp nfs clients 124 * followed by "n" which is the number of nfsds' to fork off 125 */ 126 int 127 main(argc, argv, envp) 128 int argc; 129 char *argv[], *envp[]; 130 { 131 extern int optind; 132 struct group *grp; 133 struct nfsd_args nfsdargs; 134 struct passwd *pwd; 135 struct ucred *cr; 136 struct sockaddr_in inetaddr, inetpeer; 137 #ifdef ISO 138 struct sockaddr_iso isoaddr, isopeer; 139 #endif 140 fd_set ready, sockbits; 141 int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock; 142 int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock; 143 int tp4cnt, tp4flag, tp4sock, tpipcnt, tpipflag, tpipsock, udpflag; 144 char *cp, **cpp; 145 146 #define MAXNFSDCNT 20 147 #define DEFNFSDCNT 4 148 nfsdcnt = DEFNFSDCNT; 149 cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0; 150 tpipflag = udpflag = 0; 151 #ifdef ISO 152 #define GETOPT "cn:rtu" 153 #define USAGE "[-crtu] [-n num_servers]" 154 #else 155 #define GETOPT "n:rtu" 156 #define USAGE "[-rtu] [-n num_servers]" 157 #endif 158 while ((ch = getopt(argc, argv, GETOPT)) != EOF) 159 switch (ch) { 160 case 'n': 161 nfsdcnt = atoi(optarg); 162 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) { 163 warnx("nfsd count %d; reset to %d", DEFNFSDCNT); 164 nfsdcnt = DEFNFSDCNT; 165 } 166 break; 167 case 'r': 168 reregister = 1; 169 break; 170 case 't': 171 tcpflag = 1; 172 break; 173 case 'u': 174 udpflag = 1; 175 break; 176 #ifdef ISO 177 case 'c': 178 cltpflag = 1; 179 break; 180 #ifdef notyet 181 case 'i': 182 tp4cnt = 1; 183 break; 184 case 'p': 185 tpipcnt = 1; 186 break; 187 #endif /* notyet */ 188 #endif /* ISO */ 189 default: 190 case '?': 191 usage(); 192 }; 193 argv += optind; 194 argc -= optind; 195 196 /* 197 * XXX 198 * Backward compatibility, trailing number is the count of daemons. 199 */ 200 if (argc > 1) 201 usage(); 202 if (argc == 1) { 203 nfsdcnt = atoi(argv[0]); 204 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) { 205 warnx("nfsd count %d; reset to %d", DEFNFSDCNT); 206 nfsdcnt = DEFNFSDCNT; 207 } 208 } 209 210 if (debug == 0) { 211 daemon(0, 0); 212 (void)signal(SIGHUP, SIG_IGN); 213 (void)signal(SIGINT, SIG_IGN); 214 (void)signal(SIGQUIT, SIG_IGN); 215 (void)signal(SIGSYS, nonfs); 216 (void)signal(SIGTERM, SIG_IGN); 217 } 218 (void)signal(SIGCHLD, reapchild); 219 220 if (reregister) { 221 if (udpflag && 222 !pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) 223 err(1, "can't register with portmap for UDP."); 224 if (tcpflag && 225 !pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) 226 err(1, "can't register with portmap for TCP."); 227 exit(0); 228 } 229 openlog("nfsd:", LOG_PID, LOG_DAEMON); 230 231 for (i = 0; i < nfsdcnt; i++) { 232 switch (fork()) { 233 case -1: 234 syslog(LOG_ERR, "fork: %m"); 235 exit (1); 236 case 0: 237 break; 238 default: 239 continue; 240 } 241 242 setproctitle("nfsd-srv"); 243 nfssvc_flag = NFSSVC_NFSD; 244 nsd.nsd_nfsd = NULL; 245 #ifdef KERBEROS 246 nsd.nsd_authstr = (char *)kt.dat; 247 #endif 248 while (nfssvc(nfssvc_flag, &nsd) < 0) { 249 if (errno != ENEEDAUTH) { 250 syslog(LOG_ERR, "nfssvc: %m"); 251 exit(1); 252 } 253 nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL; 254 #ifdef KERBEROS 255 kt.length = nsd.nsd_authlen; 256 kt.mbz = 0; 257 (void)strcpy(inst, "*"); 258 if (krb_rd_req(&kt, "rcmd", 259 inst, nsd.nsd_haddr, &auth, "") == RD_AP_OK && 260 krb_kntoln(&auth, lnam) == KSUCCESS && 261 (pwd = getpwnam(lnam)) != NULL) { 262 cr = &nsd.nsd_cr; 263 cr->cr_uid = pwd->pw_uid; 264 cr->cr_groups[0] = pwd->pw_gid; 265 cr->cr_ngroups = 1; 266 setgrent(); 267 while ((grp = getgrent()) != NULL) { 268 if (grp->gr_gid == cr->cr_groups[0]) 269 continue; 270 for (cpp = grp->gr_mem; 271 *cpp != NULL; ++cpp) 272 if (!strcmp(*cpp, lnam)) 273 break; 274 if (*cpp == NULL) 275 continue; 276 cr->cr_groups[cr->cr_ngroups++] 277 = grp->gr_gid; 278 if (cr->cr_ngroups == NGROUPS) 279 break; 280 } 281 endgrent(); 282 nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN; 283 } 284 #endif /* KERBEROS */ 285 } 286 exit(0); 287 } 288 289 /* If we are serving udp, set up the socket. */ 290 if (udpflag) { 291 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 292 syslog(LOG_ERR, "can't create udp socket"); 293 exit(1); 294 } 295 inetaddr.sin_family = AF_INET; 296 inetaddr.sin_addr.s_addr = INADDR_ANY; 297 inetaddr.sin_port = htons(NFS_PORT); 298 inetaddr.sin_len = sizeof(inetaddr); 299 if (bind(sock, 300 (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) { 301 syslog(LOG_ERR, "can't bind udp addr"); 302 exit(1); 303 } 304 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) { 305 syslog(LOG_ERR, "can't register with udp portmap"); 306 exit(1); 307 } 308 nfsdargs.sock = sock; 309 nfsdargs.name = NULL; 310 nfsdargs.namelen = 0; 311 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) { 312 syslog(LOG_ERR, "can't Add UDP socket"); 313 exit(1); 314 } 315 (void)close(sock); 316 } 317 318 #ifdef ISO 319 /* If we are serving cltp, set up the socket. */ 320 if (cltpflag) { 321 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) { 322 syslog(LOG_ERR, "can't create cltp socket"); 323 exit(1); 324 } 325 memset(&isoaddr, 0, sizeof(isoaddr)); 326 isoaddr.siso_family = AF_ISO; 327 isoaddr.siso_tlen = 2; 328 cp = TSEL(&isoaddr); 329 *cp++ = (NFS_PORT >> 8); 330 *cp = (NFS_PORT & 0xff); 331 isoaddr.siso_len = sizeof(isoaddr); 332 if (bind(sock, 333 (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) { 334 syslog(LOG_ERR, "can't bind cltp addr"); 335 exit(1); 336 } 337 #ifdef notyet 338 /* 339 * XXX 340 * Someday this should probably use "rpcbind", the son of 341 * portmap. 342 */ 343 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) { 344 syslog(LOG_ERR, "can't register with udp portmap"); 345 exit(1); 346 } 347 #endif /* notyet */ 348 nfsdargs.sock = sock; 349 nfsdargs.name = NULL; 350 nfsdargs.namelen = 0; 351 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) { 352 syslog(LOG_ERR, "can't add UDP socket"); 353 exit(1); 354 } 355 close(sock); 356 } 357 #endif /* ISO */ 358 359 /* Now set up the master server socket waiting for tcp connections. */ 360 on = 1; 361 FD_ZERO(&sockbits); 362 connect_type_cnt = 0; 363 if (tcpflag) { 364 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 365 syslog(LOG_ERR, "can't create tcp socket"); 366 exit(1); 367 } 368 if (setsockopt(tcpsock, 369 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 370 syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 371 inetaddr.sin_family = AF_INET; 372 inetaddr.sin_addr.s_addr = INADDR_ANY; 373 inetaddr.sin_port = htons(NFS_PORT); 374 inetaddr.sin_len = sizeof(inetaddr); 375 if (bind(tcpsock, 376 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) { 377 syslog(LOG_ERR, "can't bind tcp addr"); 378 exit(1); 379 } 380 if (listen(tcpsock, 5) < 0) { 381 syslog(LOG_ERR, "listen failed"); 382 exit(1); 383 } 384 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) { 385 syslog(LOG_ERR, "can't register tcp with portmap"); 386 exit(1); 387 } 388 FD_SET(tcpsock, &sockbits); 389 maxsock = tcpsock; 390 connect_type_cnt++; 391 } 392 393 #ifdef notyet 394 /* Now set up the master server socket waiting for tp4 connections. */ 395 if (tp4flag) { 396 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) { 397 syslog(LOG_ERR, "can't create tp4 socket"); 398 exit(1); 399 } 400 if (setsockopt(tp4sock, 401 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 402 syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 403 memset(&isoaddr, 0, sizeof(isoaddr)); 404 isoaddr.siso_family = AF_ISO; 405 isoaddr.siso_tlen = 2; 406 cp = TSEL(&isoaddr); 407 *cp++ = (NFS_PORT >> 8); 408 *cp = (NFS_PORT & 0xff); 409 isoaddr.siso_len = sizeof(isoaddr); 410 if (bind(tp4sock, 411 (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) { 412 syslog(LOG_ERR, "can't bind tp4 addr"); 413 exit(1); 414 } 415 if (listen(tp4sock, 5) < 0) { 416 syslog(LOG_ERR, "listen failed"); 417 exit(1); 418 } 419 /* 420 * XXX 421 * Someday this should probably use "rpcbind", the son of 422 * portmap. 423 */ 424 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) { 425 syslog(LOG_ERR, "can't register tcp with portmap"); 426 exit(1); 427 } 428 FD_SET(tp4sock, &sockbits); 429 maxsock = tp4sock; 430 connect_type_cnt++; 431 } 432 433 /* Now set up the master server socket waiting for tpip connections. */ 434 if (tpipflag) { 435 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) { 436 syslog(LOG_ERR, "can't create tpip socket"); 437 exit(1); 438 } 439 if (setsockopt(tpipsock, 440 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 441 syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m"); 442 inetaddr.sin_family = AF_INET; 443 inetaddr.sin_addr.s_addr = INADDR_ANY; 444 inetaddr.sin_port = htons(NFS_PORT); 445 inetaddr.sin_len = sizeof(inetaddr); 446 if (bind(tpipsock, 447 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) { 448 syslog(LOG_ERR, "can't bind tcp addr"); 449 exit(1); 450 } 451 if (listen(tpipsock, 5) < 0) { 452 syslog(LOG_ERR, "listen failed"); 453 exit(1); 454 } 455 /* 456 * XXX 457 * Someday this should probably use "rpcbind", the son of 458 * portmap. 459 */ 460 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) { 461 syslog(LOG_ERR, "can't register tcp with portmap"); 462 exit(1); 463 } 464 FD_SET(tpipsock, &sockbits); 465 maxsock = tpipsock; 466 connect_type_cnt++; 467 } 468 #endif /* notyet */ 469 470 if (connect_type_cnt == 0) 471 exit(0); 472 473 setproctitle("nfsd-master"); 474 475 /* 476 * Loop forever accepting connections and passing the sockets 477 * into the kernel for the mounts. 478 */ 479 for (;;) { 480 ready = sockbits; 481 if (connect_type_cnt > 1) { 482 if (select(maxsock + 1, 483 &ready, NULL, NULL, NULL) < 1) { 484 syslog(LOG_ERR, "select failed: %m"); 485 exit(1); 486 } 487 } 488 if (tcpflag && FD_ISSET(tcpsock, &ready)) { 489 len = sizeof(inetpeer); 490 if ((msgsock = accept(tcpsock, 491 (struct sockaddr *)&inetpeer, &len)) < 0) { 492 syslog(LOG_ERR, "accept failed: %m"); 493 exit(1); 494 } 495 memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero)); 496 if (setsockopt(msgsock, SOL_SOCKET, 497 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 498 syslog(LOG_ERR, 499 "setsockopt SO_KEEPALIVE: %m"); 500 nfsdargs.sock = msgsock; 501 nfsdargs.name = (caddr_t)&inetpeer; 502 nfsdargs.namelen = sizeof(inetpeer); 503 nfssvc(NFSSVC_ADDSOCK, &nfsdargs); 504 (void)close(msgsock); 505 } 506 #ifdef notyet 507 if (tp4flag && FD_ISSET(tp4sock, &ready)) { 508 len = sizeof(isopeer); 509 if ((msgsock = accept(tp4sock, 510 (struct sockaddr *)&isopeer, &len)) < 0) { 511 syslog(LOG_ERR, "accept failed: %m"); 512 exit(1); 513 } 514 if (setsockopt(msgsock, SOL_SOCKET, 515 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 516 syslog(LOG_ERR, 517 "setsockopt SO_KEEPALIVE: %m"); 518 nfsdargs.sock = msgsock; 519 nfsdargs.name = (caddr_t)&isopeer; 520 nfsdargs.namelen = len; 521 nfssvc(NFSSVC_ADDSOCK, &nfsdargs); 522 (void)close(msgsock); 523 } 524 if (tpipflag && FD_ISSET(tpipsock, &ready)) { 525 len = sizeof(inetpeer); 526 if ((msgsock = accept(tpipsock, 527 (struct sockaddr *)&inetpeer, &len)) < 0) { 528 syslog(LOG_ERR, "Accept failed: %m"); 529 exit(1); 530 } 531 if (setsockopt(msgsock, SOL_SOCKET, 532 SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0) 533 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m"); 534 nfsdargs.sock = msgsock; 535 nfsdargs.name = (caddr_t)&inetpeer; 536 nfsdargs.namelen = len; 537 nfssvc(NFSSVC_ADDSOCK, &nfsdargs); 538 (void)close(msgsock); 539 } 540 #endif /* notyet */ 541 } 542 } 543 544 void 545 usage() 546 { 547 (void)fprintf(stderr, "nfsd %s\n", USAGE); 548 exit(1); 549 } 550 551 void 552 nonfs(signo) 553 int signo; 554 { 555 syslog(LOG_ERR, "missing system call: NFS not available."); 556 } 557 558 void 559 reapchild(signo) 560 int signo; 561 { 562 563 while (wait3(NULL, WNOHANG, NULL)); 564 } 565
Indexes created Tue Sep 23 14:10:03 GMT 2025