590 lines
15 KiB
C
590 lines
15 KiB
C
/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif not lint
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#ifndef lint
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static char sccsid[] = "@(#)nfsd.c 8.7 (Berkeley) 2/22/94";
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#endif not lint
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#include <sys/param.h>
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#include <sys/syslog.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sys/uio.h>
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#include <sys/ucred.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_prot.h>
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#ifdef ISO
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#include <netiso/iso.h>
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#endif
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#include <nfs/rpcv2.h>
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#include <nfs/nfsv2.h>
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#include <nfs/nfs.h>
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#ifdef KERBEROS
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#include <kerberosIV/des.h>
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#include <kerberosIV/krb.h>
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#endif
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <grp.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <unistd.h>
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/* Global defs */
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#ifdef DEBUG
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#define syslog(e, s) fprintf(stderr,(s))
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int debug = 1;
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#else
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int debug = 0;
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#endif
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struct nfsd_srvargs nsd;
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char **Argv = NULL; /* pointer to argument vector */
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char *LastArg = NULL; /* end of argv */
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#ifdef KERBEROS
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char lnam[ANAME_SZ];
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KTEXT_ST kt;
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AUTH_DAT auth;
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char inst[INST_SZ];
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#endif
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void nonfs __P((int));
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void reapchild __P((int));
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void setproctitle __P((char *));
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void usage __P((void));
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/*
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* Nfs server daemon mostly just a user context for nfssvc()
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*
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* 1 - do file descriptor and signal cleanup
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* 2 - fork the nfsd(s)
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* 3 - create server socket(s)
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* 4 - register socket with portmap
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*
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* For connectionless protocols, just pass the socket into the kernel via.
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* nfssvc().
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* For connection based sockets, loop doing accepts. When you get a new
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* socket from accept, pass the msgsock into the kernel via. nfssvc().
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* The arguments are:
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* -c - support iso cltp clients
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* -r - reregister with portmapper
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* -t - support tcp nfs clients
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* -u - support udp nfs clients
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* followed by "n" which is the number of nfsds' to fork off
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*/
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int
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main(argc, argv, envp)
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int argc;
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char *argv[], *envp[];
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{
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extern int optind;
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struct group *grp;
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struct nfsd_args nfsdargs;
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struct passwd *pwd;
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struct ucred *cr;
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struct sockaddr_in inetaddr, inetpeer;
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#ifdef ISO
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struct sockaddr_iso isoaddr, isopeer;
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#endif
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fd_set ready, sockbits;
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int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
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int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
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int tp4cnt, tp4flag, tp4sock, tpipcnt, tpipflag, tpipsock, udpflag;
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char *cp, **cpp;
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/* Save start and extent of argv for setproctitle. */
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Argv = argv;
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if (envp == 0 || *envp == 0)
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envp = argv;
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while (*envp)
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envp++;
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LastArg = envp[-1] + strlen(envp[-1]);
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#define MAXNFSDCNT 20
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#define DEFNFSDCNT 4
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nfsdcnt = DEFNFSDCNT;
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cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
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tpipflag = udpflag = 0;
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#ifdef ISO
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#define GETOPT "cn:rtu"
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#define USAGE "[-crtu] [-n num_servers]"
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#else
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#define GETOPT "n:rtu"
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#define USAGE "[-rtu] [-n num_servers]"
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#endif
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while ((ch = getopt(argc, argv, GETOPT)) != EOF)
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switch (ch) {
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case 'n':
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nfsdcnt = atoi(optarg);
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if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
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warnx("nfsd count %d; reset to %d", DEFNFSDCNT);
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nfsdcnt = DEFNFSDCNT;
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}
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break;
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case 'r':
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reregister = 1;
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break;
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case 't':
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tcpflag = 1;
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break;
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case 'u':
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udpflag = 1;
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break;
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#ifdef ISO
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case 'c':
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cltpflag = 1;
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break;
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#ifdef notyet
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case 'i':
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tp4cnt = 1;
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break;
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case 'p':
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tpipcnt = 1;
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break;
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#endif /* notyet */
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#endif /* ISO */
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default:
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case '?':
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usage();
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};
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argv += optind;
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argc -= optind;
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/*
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* XXX
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* Backward compatibility, trailing number is the count of daemons.
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*/
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if (argc > 1)
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usage();
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if (argc == 1) {
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nfsdcnt = atoi(argv[0]);
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if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
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warnx("nfsd count %d; reset to %d", DEFNFSDCNT);
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nfsdcnt = DEFNFSDCNT;
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}
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}
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if (debug == 0) {
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daemon(0, 0);
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(void)signal(SIGHUP, SIG_IGN);
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(void)signal(SIGINT, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGSYS, nonfs);
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(void)signal(SIGTERM, SIG_IGN);
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}
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(void)signal(SIGCHLD, reapchild);
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if (reregister) {
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if (udpflag &&
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!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT))
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err(1, "can't register with portmap for UDP.");
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if (tcpflag &&
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!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT))
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err(1, "can't register with portmap for TCP.");
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exit(0);
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}
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openlog("nfsd:", LOG_PID, LOG_DAEMON);
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for (i = 0; i < nfsdcnt; i++) {
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switch (fork()) {
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case -1:
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syslog(LOG_ERR, "fork: %m");
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exit (1);
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case 0:
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break;
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default:
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continue;
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}
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setproctitle("nfsd-srv");
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nfssvc_flag = NFSSVC_NFSD;
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nsd.nsd_nfsd = NULL;
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#ifdef KERBEROS
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nsd.nsd_authstr = (char *)kt.dat;
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#endif
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while (nfssvc(nfssvc_flag, &nsd) < 0) {
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if (errno != ENEEDAUTH) {
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syslog(LOG_ERR, "nfssvc: %m");
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exit(1);
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}
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nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
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#ifdef KERBEROS
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kt.length = nsd.nsd_authlen;
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kt.mbz = 0;
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(void)strcpy(inst, "*");
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if (krb_rd_req(&kt, "rcmd",
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inst, nsd.nsd_haddr, &auth, "") == RD_AP_OK &&
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krb_kntoln(&auth, lnam) == KSUCCESS &&
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(pwd = getpwnam(lnam)) != NULL) {
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cr = &nsd.nsd_cr;
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cr->cr_uid = pwd->pw_uid;
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cr->cr_groups[0] = pwd->pw_gid;
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cr->cr_ngroups = 1;
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setgrent();
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while ((grp = getgrent()) != NULL) {
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if (grp->gr_gid == cr->cr_groups[0])
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continue;
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for (cpp = grp->gr_mem;
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*cpp != NULL; ++cpp)
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if (!strcmp(*cpp, lnam))
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break;
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if (*cpp == NULL)
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continue;
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cr->cr_groups[cr->cr_ngroups++]
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= grp->gr_gid;
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if (cr->cr_ngroups == NGROUPS)
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break;
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}
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endgrent();
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nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
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}
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#endif /* KERBEROS */
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}
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exit(0);
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}
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/* If we are serving udp, set up the socket. */
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if (udpflag) {
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if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create udp socket");
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exit(1);
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}
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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if (bind(sock,
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(struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind udp addr");
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exit(1);
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}
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if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
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syslog(LOG_ERR, "can't register with udp portmap");
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exit(1);
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}
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nfsdargs.sock = sock;
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nfsdargs.name = NULL;
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nfsdargs.namelen = 0;
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if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
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syslog(LOG_ERR, "can't Add UDP socket");
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exit(1);
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}
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(void)close(sock);
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}
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#ifdef ISO
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/* If we are serving cltp, set up the socket. */
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if (cltpflag) {
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if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create cltp socket");
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exit(1);
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}
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memset(&isoaddr, 0, sizeof(isoaddr));
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isoaddr.siso_family = AF_ISO;
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isoaddr.siso_tlen = 2;
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cp = TSEL(&isoaddr);
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*cp++ = (NFS_PORT >> 8);
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*cp = (NFS_PORT & 0xff);
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isoaddr.siso_len = sizeof(isoaddr);
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if (bind(sock,
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(struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
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syslog(LOG_ERR, "can't bind cltp addr");
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exit(1);
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}
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#ifdef notyet
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/*
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* XXX
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* Someday this should probably use "rpcbind", the son of
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* portmap.
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*/
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if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
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syslog(LOG_ERR, "can't register with udp portmap");
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exit(1);
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}
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#endif /* notyet */
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nfsdargs.sock = sock;
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nfsdargs.name = NULL;
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nfsdargs.namelen = 0;
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if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
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syslog(LOG_ERR, "can't add UDP socket");
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exit(1);
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}
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close(sock);
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}
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#endif /* ISO */
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/* Now set up the master server socket waiting for tcp connections. */
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on = 1;
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FD_ZERO(&sockbits);
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connect_type_cnt = 0;
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if (tcpflag) {
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if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create tcp socket");
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exit(1);
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}
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if (setsockopt(tcpsock,
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SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
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syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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if (bind(tcpsock,
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(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind tcp addr");
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exit(1);
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}
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if (listen(tcpsock, 5) < 0) {
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syslog(LOG_ERR, "listen failed");
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exit(1);
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}
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if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
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syslog(LOG_ERR, "can't register tcp with portmap");
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exit(1);
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}
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FD_SET(tcpsock, &sockbits);
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maxsock = tcpsock;
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connect_type_cnt++;
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}
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#ifdef notyet
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/* Now set up the master server socket waiting for tp4 connections. */
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if (tp4flag) {
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if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
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syslog(LOG_ERR, "can't create tp4 socket");
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exit(1);
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}
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if (setsockopt(tp4sock,
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SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
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syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
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memset(&isoaddr, 0, sizeof(isoaddr));
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isoaddr.siso_family = AF_ISO;
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isoaddr.siso_tlen = 2;
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cp = TSEL(&isoaddr);
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*cp++ = (NFS_PORT >> 8);
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*cp = (NFS_PORT & 0xff);
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isoaddr.siso_len = sizeof(isoaddr);
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if (bind(tp4sock,
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(struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
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syslog(LOG_ERR, "can't bind tp4 addr");
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exit(1);
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}
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if (listen(tp4sock, 5) < 0) {
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syslog(LOG_ERR, "listen failed");
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exit(1);
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}
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/*
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* XXX
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* Someday this should probably use "rpcbind", the son of
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* portmap.
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*/
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if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
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syslog(LOG_ERR, "can't register tcp with portmap");
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exit(1);
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}
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FD_SET(tp4sock, &sockbits);
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maxsock = tp4sock;
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connect_type_cnt++;
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}
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/* Now set up the master server socket waiting for tpip connections. */
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if (tpipflag) {
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if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
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syslog(LOG_ERR, "can't create tpip socket");
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exit(1);
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}
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if (setsockopt(tpipsock,
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SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
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syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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if (bind(tpipsock,
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(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind tcp addr");
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exit(1);
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}
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if (listen(tpipsock, 5) < 0) {
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syslog(LOG_ERR, "listen failed");
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exit(1);
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}
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/*
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* XXX
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* Someday this should probably use "rpcbind", the son of
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* portmap.
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*/
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if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
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syslog(LOG_ERR, "can't register tcp with portmap");
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exit(1);
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}
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FD_SET(tpipsock, &sockbits);
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maxsock = tpipsock;
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connect_type_cnt++;
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}
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#endif /* notyet */
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if (connect_type_cnt == 0)
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exit(0);
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setproctitle("nfsd-master");
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/*
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* Loop forever accepting connections and passing the sockets
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* into the kernel for the mounts.
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*/
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for (;;) {
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ready = sockbits;
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if (connect_type_cnt > 1) {
|
|
if (select(maxsock + 1,
|
|
&ready, NULL, NULL, NULL) < 1) {
|
|
syslog(LOG_ERR, "select failed: %m");
|
|
exit(1);
|
|
}
|
|
}
|
|
if (tcpflag && FD_ISSET(tcpsock, &ready)) {
|
|
len = sizeof(inetpeer);
|
|
if ((msgsock = accept(tcpsock,
|
|
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
|
syslog(LOG_ERR, "accept failed: %m");
|
|
exit(1);
|
|
}
|
|
memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
|
|
if (setsockopt(msgsock, SOL_SOCKET,
|
|
SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR,
|
|
"setsockopt SO_KEEPALIVE: %m");
|
|
nfsdargs.sock = msgsock;
|
|
nfsdargs.name = (caddr_t)&inetpeer;
|
|
nfsdargs.namelen = sizeof(inetpeer);
|
|
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
|
(void)close(msgsock);
|
|
}
|
|
#ifdef notyet
|
|
if (tp4flag && FD_ISSET(tp4sock, &ready)) {
|
|
len = sizeof(isopeer);
|
|
if ((msgsock = accept(tp4sock,
|
|
(struct sockaddr *)&isopeer, &len)) < 0) {
|
|
syslog(LOG_ERR, "accept failed: %m");
|
|
exit(1);
|
|
}
|
|
if (setsockopt(msgsock, SOL_SOCKET,
|
|
SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR,
|
|
"setsockopt SO_KEEPALIVE: %m");
|
|
nfsdargs.sock = msgsock;
|
|
nfsdargs.name = (caddr_t)&isopeer;
|
|
nfsdargs.namelen = len;
|
|
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
|
(void)close(msgsock);
|
|
}
|
|
if (tpipflag && FD_ISSET(tpipsock, &ready)) {
|
|
len = sizeof(inetpeer);
|
|
if ((msgsock = accept(tpipsock,
|
|
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
|
syslog(LOG_ERR, "Accept failed: %m");
|
|
exit(1);
|
|
}
|
|
if (setsockopt(msgsock, SOL_SOCKET,
|
|
SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
|
|
nfsdargs.sock = msgsock;
|
|
nfsdargs.name = (caddr_t)&inetpeer;
|
|
nfsdargs.namelen = len;
|
|
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
|
(void)close(msgsock);
|
|
}
|
|
#endif /* notyet */
|
|
}
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "nfsd %s\n", USAGE);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
nonfs(signo)
|
|
int signo;
|
|
{
|
|
syslog(LOG_ERR, "missing system call: NFS not available.");
|
|
}
|
|
|
|
void
|
|
reapchild(signo)
|
|
int signo;
|
|
{
|
|
|
|
while (wait3(NULL, WNOHANG, NULL));
|
|
}
|
|
|
|
void
|
|
setproctitle(a)
|
|
char *a;
|
|
{
|
|
register char *cp;
|
|
char buf[80];
|
|
|
|
cp = Argv[0];
|
|
(void)snprintf(buf, sizeof(buf), "%s", a);
|
|
(void)strncpy(cp, buf, LastArg - cp);
|
|
cp += strlen(cp);
|
|
while (cp < LastArg)
|
|
*cp++ = ' ';
|
|
}
|