20d0a5e544
This includes the addition of a new flag "-4" that will force use of the experimental server with nfsv4 support in it. This commit also adds two new man pages to the repository that are NFSv4 specific. One describes the file used by the server to restart nfsv4 services safely. The other is a brief overview of nfsv4 and its setup. Reviewed by: dfr Approved by: kib (mentor)
974 lines
26 KiB
C
974 lines
26 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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* 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 const 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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#if 0
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static char sccsid[] = "@(#)nfsd.c 8.9 (Berkeley) 3/29/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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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/wait.h>
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#include <sys/mount.h>
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#include <sys/fcntl.h>
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#include <sys/linker.h>
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#include <sys/module.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfsserver/nfs.h>
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#include <nfs/nfssvc.h>
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#include <err.h>
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#include <errno.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 <string.h>
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#include <unistd.h>
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#include <netdb.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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#define NFSD_STABLERESTART "/var/db/nfs-stablerestart"
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#define MAXNFSDCNT 256
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#define DEFNFSDCNT 4
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pid_t children[MAXNFSDCNT]; /* PIDs of children */
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int nfsdcnt; /* number of children */
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int new_syscall;
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int run_v4server = 0; /* Force running of nfsv4 server */
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int nfssvc_nfsd; /* Set to correct NFSSVC_xxx flag */
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void cleanup(int);
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void child_cleanup(int);
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void killchildren(void);
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void nfsd_exit(int);
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void nonfs(int);
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void reapchild(int);
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int setbindhost(struct addrinfo **ia, const char *bindhost,
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struct addrinfo hints);
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void start_server(int);
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void unregistration(void);
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void usage(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 rpcbind
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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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* -r - reregister with rpcbind
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* -d - unregister with rpcbind
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* -t - support tcp nfs clients
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* -u - support udp nfs clients
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* -4 - forces it to run a server that supports nfsv4
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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(int argc, char **argv)
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{
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struct nfsd_addsock_args addsockargs;
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struct addrinfo *ai_udp, *ai_tcp, *ai_udp6, *ai_tcp6, hints;
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struct netconfig *nconf_udp, *nconf_tcp, *nconf_udp6, *nconf_tcp6;
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struct netbuf nb_udp, nb_tcp, nb_udp6, nb_tcp6;
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struct sockaddr_in inetpeer;
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struct sockaddr_in6 inet6peer;
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fd_set ready, sockbits;
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fd_set v4bits, v6bits;
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int ch, connect_type_cnt, i, maxsock, msgsock;
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socklen_t len;
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int on = 1, unregister, reregister, sock;
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int tcp6sock, ip6flag, tcpflag, tcpsock;
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int udpflag, ecode, s, srvcnt;
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int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
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int stablefd, nfssvc_addsock;
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char **bindhost = NULL;
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pid_t pid;
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nfsdcnt = DEFNFSDCNT;
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unregister = reregister = tcpflag = maxsock = 0;
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bindanyflag = udpflag = connect_type_cnt = bindhostc = 0;
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#define GETOPT "ah:n:rdtu4"
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#define USAGE "[-ardtu4] [-n num_servers] [-h bindip]"
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while ((ch = getopt(argc, argv, GETOPT)) != -1)
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switch (ch) {
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case 'a':
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bindanyflag = 1;
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break;
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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", nfsdcnt,
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DEFNFSDCNT);
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nfsdcnt = DEFNFSDCNT;
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}
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break;
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case 'h':
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup(optarg);
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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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 'd':
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unregister = 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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case '4':
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run_v4server = 1;
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break;
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default:
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case '?':
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usage();
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};
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if (!tcpflag && !udpflag)
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udpflag = 1;
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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", nfsdcnt,
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DEFNFSDCNT);
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nfsdcnt = DEFNFSDCNT;
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}
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}
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/*
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* If the "-4" option was specified OR only the nfsd module is
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* found in the server, run "nfsd".
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* Otherwise, try and run "nfsserver".
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*/
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if (run_v4server > 0) {
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if (modfind("nfsd") < 0) {
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/* Not present in kernel, try loading it */
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if (kldload("nfsd") < 0 || modfind("nfsd") < 0)
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errx(1, "NFS server is not available");
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}
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} else if (modfind("nfsserver") < 0 && modfind("nfsd") >= 0) {
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run_v4server = 1;
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} else if (modfind("nfsserver") < 0) {
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/* Not present in kernel, try loading it */
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if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0)
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errx(1, "NFS server is not available");
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}
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ip6flag = 1;
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s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (s == -1) {
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if (errno != EPROTONOSUPPORT)
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err(1, "socket");
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ip6flag = 0;
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} else if (getnetconfigent("udp6") == NULL ||
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getnetconfigent("tcp6") == NULL) {
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ip6flag = 0;
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}
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if (s != -1)
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close(s);
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if (bindhostc == 0 || bindanyflag) {
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup("*");
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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}
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if (unregister) {
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unregistration();
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exit (0);
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}
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if (reregister) {
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if (udpflag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
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if (ecode != 0)
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err(1, "getaddrinfo udp: %s", gai_strerror(ecode));
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nconf_udp = getnetconfigent("udp");
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if (nconf_udp == NULL)
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err(1, "getnetconfigent udp failed");
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nb_udp.buf = ai_udp->ai_addr;
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nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp, &nb_udp)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_udp, &nb_udp)))
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err(1, "rpcb_set udp failed");
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freeaddrinfo(ai_udp);
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}
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if (udpflag && ip6flag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
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if (ecode != 0)
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err(1, "getaddrinfo udp6: %s", gai_strerror(ecode));
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nconf_udp6 = getnetconfigent("udp6");
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if (nconf_udp6 == NULL)
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err(1, "getnetconfigent udp6 failed");
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nb_udp6.buf = ai_udp6->ai_addr;
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nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp6, &nb_udp6)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_udp6, &nb_udp6)))
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err(1, "rpcb_set udp6 failed");
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freeaddrinfo(ai_udp6);
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}
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if (tcpflag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp);
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if (ecode != 0)
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err(1, "getaddrinfo tcp: %s", gai_strerror(ecode));
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nconf_tcp = getnetconfigent("tcp");
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if (nconf_tcp == NULL)
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err(1, "getnetconfigent tcp failed");
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nb_tcp.buf = ai_tcp->ai_addr;
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nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp, &nb_tcp)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_tcp, &nb_tcp)))
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err(1, "rpcb_set tcp failed");
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freeaddrinfo(ai_tcp);
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}
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if (tcpflag && ip6flag) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
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if (ecode != 0)
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err(1, "getaddrinfo tcp6: %s", gai_strerror(ecode));
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nconf_tcp6 = getnetconfigent("tcp6");
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if (nconf_tcp6 == NULL)
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err(1, "getnetconfigent tcp6 failed");
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nb_tcp6.buf = ai_tcp6->ai_addr;
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nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
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if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp6, &nb_tcp6)) ||
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(!rpcb_set(RPCPROG_NFS, 3, nconf_tcp6, &nb_tcp6)))
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err(1, "rpcb_set tcp6 failed");
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freeaddrinfo(ai_tcp6);
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}
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exit (0);
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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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/*
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* nfsd sits in the kernel most of the time. It needs
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* to ignore SIGTERM/SIGQUIT in order to stay alive as long
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* as possible during a shutdown, otherwise loopback
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* mounts will not be able to unmount.
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*/
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(void)signal(SIGTERM, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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}
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(void)signal(SIGSYS, nonfs);
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(void)signal(SIGCHLD, reapchild);
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openlog("nfsd", LOG_PID, LOG_DAEMON);
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/*
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* For V4, we open the stablerestart file and call nfssvc()
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* to get it loaded. This is done before the daemons do the
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* regular nfssvc() call to service NFS requests.
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* (This way the file remains open until the last nfsd is killed
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* off.)
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* Note that this file is not created by this daemon and can
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* only be relocated by recompiling the daemon, in order to
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* minimize accidentally starting up with the wrong file.
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* If should be created as an empty file Read and Write for
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* root before the first time you run NFS v4 and should never
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* be re-initialized if at all possible. It should live on a
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* local, non-volatile storage device that does not do hardware
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* level write-back caching. (See SCSI doc for more information
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* on how to prevent write-back caching on SCSI disks.)
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*/
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if (run_v4server > 0) {
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stablefd = open(NFSD_STABLERESTART, O_RDWR, 0);
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if (stablefd < 0) {
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syslog(LOG_ERR, "Can't open %s\n", NFSD_STABLERESTART);
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exit(1);
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}
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if (nfssvc(NFSSVC_STABLERESTART, (caddr_t)&stablefd) < 0) {
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syslog(LOG_ERR, "Can't read stable storage file\n");
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exit(1);
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}
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nfssvc_addsock = NFSSVC_NFSDADDSOCK;
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nfssvc_nfsd = NFSSVC_NFSDNFSD;
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new_syscall = TRUE;
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} else {
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nfssvc_addsock = NFSSVC_ADDSOCK;
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nfssvc_nfsd = NFSSVC_NFSD;
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/*
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* Figure out if the kernel supports the new-style
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* NFSSVC_NFSD. Old kernels will return ENXIO because they
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* don't recognise the flag value, new ones will return EINVAL
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* because argp is NULL.
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*/
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new_syscall = FALSE;
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if (nfssvc(NFSSVC_NFSD, NULL) < 0 && errno == EINVAL)
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new_syscall = TRUE;
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}
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if (!new_syscall) {
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/* If we use UDP only, we start the last server below. */
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srvcnt = tcpflag ? nfsdcnt : nfsdcnt - 1;
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for (i = 0; i < srvcnt; i++) {
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switch ((pid = fork())) {
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case -1:
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syslog(LOG_ERR, "fork: %m");
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nfsd_exit(1);
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case 0:
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break;
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default:
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children[i] = pid;
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continue;
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}
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(void)signal(SIGUSR1, child_cleanup);
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setproctitle("server");
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start_server(0);
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}
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} else if (tcpflag) {
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/*
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* For TCP mode, we fork once to start the first
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* kernel nfsd thread. The kernel will add more
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* threads as needed.
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*/
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pid = fork();
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if (pid == -1) {
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syslog(LOG_ERR, "fork: %m");
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nfsd_exit(1);
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}
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if (pid) {
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children[0] = pid;
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} else {
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(void)signal(SIGUSR1, child_cleanup);
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setproctitle("server");
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start_server(0);
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}
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}
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(void)signal(SIGUSR1, cleanup);
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FD_ZERO(&v4bits);
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FD_ZERO(&v6bits);
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FD_ZERO(&sockbits);
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rpcbregcnt = 0;
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/* Set up the socket for udp and rpcb register it. */
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if (udpflag) {
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rpcbreg = 0;
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for (i = 0; i < bindhostc; i++) {
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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if (setbindhost(&ai_udp, bindhost[i], hints) == 0) {
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rpcbreg = 1;
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rpcbregcnt++;
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if ((sock = socket(ai_udp->ai_family,
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ai_udp->ai_socktype,
|
|
ai_udp->ai_protocol)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create udp socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (bind(sock, ai_udp->ai_addr,
|
|
ai_udp->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind udp addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_udp);
|
|
addsockargs.sock = sock;
|
|
addsockargs.name = NULL;
|
|
addsockargs.namelen = 0;
|
|
if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
|
|
syslog(LOG_ERR, "can't Add UDP socket");
|
|
nfsd_exit(1);
|
|
}
|
|
(void)close(sock);
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo udp: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_udp = getnetconfigent("udp");
|
|
if (nconf_udp == NULL)
|
|
err(1, "getnetconfigent udp failed");
|
|
nb_udp.buf = ai_udp->ai_addr;
|
|
nb_udp.len = nb_udp.maxlen = ai_udp->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp, &nb_udp)) ||
|
|
(!rpcb_set(RPCPROG_NFS, 3, nconf_udp, &nb_udp)))
|
|
err(1, "rpcb_set udp failed");
|
|
freeaddrinfo(ai_udp);
|
|
}
|
|
}
|
|
|
|
/* Set up the socket for udp6 and rpcb register it. */
|
|
if (udpflag && ip6flag) {
|
|
rpcbreg = 0;
|
|
for (i = 0; i < bindhostc; i++) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
if (setbindhost(&ai_udp6, bindhost[i], hints) == 0) {
|
|
rpcbreg = 1;
|
|
rpcbregcnt++;
|
|
if ((sock = socket(ai_udp6->ai_family,
|
|
ai_udp6->ai_socktype,
|
|
ai_udp6->ai_protocol)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create udp6 socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
&on, sizeof on) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't set v6-only binding for "
|
|
"udp6 socket: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
if (bind(sock, ai_udp6->ai_addr,
|
|
ai_udp6->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind udp6 addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_udp6);
|
|
addsockargs.sock = sock;
|
|
addsockargs.name = NULL;
|
|
addsockargs.namelen = 0;
|
|
if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't add UDP6 socket");
|
|
nfsd_exit(1);
|
|
}
|
|
(void)close(sock);
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = IPPROTO_UDP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints, &ai_udp6);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo udp6: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_udp6 = getnetconfigent("udp6");
|
|
if (nconf_udp6 == NULL)
|
|
err(1, "getnetconfigent udp6 failed");
|
|
nb_udp6.buf = ai_udp6->ai_addr;
|
|
nb_udp6.len = nb_udp6.maxlen = ai_udp6->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_udp6, &nb_udp6)) ||
|
|
(!rpcb_set(RPCPROG_NFS, 3, nconf_udp6, &nb_udp6)))
|
|
err(1, "rpcb_set udp6 failed");
|
|
freeaddrinfo(ai_udp6);
|
|
}
|
|
}
|
|
|
|
/* Set up the socket for tcp and rpcb register it. */
|
|
if (tcpflag) {
|
|
rpcbreg = 0;
|
|
for (i = 0; i < bindhostc; i++) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
if (setbindhost(&ai_tcp, bindhost[i], hints) == 0) {
|
|
rpcbreg = 1;
|
|
rpcbregcnt++;
|
|
if ((tcpsock = socket(AF_INET, SOCK_STREAM,
|
|
0)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create tpc socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(tcpsock, SOL_SOCKET,
|
|
SO_REUSEADDR,
|
|
(char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR,
|
|
"setsockopt SO_REUSEADDR: %m");
|
|
if (bind(tcpsock, ai_tcp->ai_addr,
|
|
ai_tcp->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind tcp addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
if (listen(tcpsock, 5) < 0) {
|
|
syslog(LOG_ERR, "listen failed");
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_tcp);
|
|
FD_SET(tcpsock, &sockbits);
|
|
FD_SET(tcpsock, &v4bits);
|
|
maxsock = tcpsock;
|
|
connect_type_cnt++;
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints,
|
|
&ai_tcp);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo tcp: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_tcp = getnetconfigent("tcp");
|
|
if (nconf_tcp == NULL)
|
|
err(1, "getnetconfigent tcp failed");
|
|
nb_tcp.buf = ai_tcp->ai_addr;
|
|
nb_tcp.len = nb_tcp.maxlen = ai_tcp->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp,
|
|
&nb_tcp)) || (!rpcb_set(RPCPROG_NFS, 3,
|
|
nconf_tcp, &nb_tcp)))
|
|
err(1, "rpcb_set tcp failed");
|
|
freeaddrinfo(ai_tcp);
|
|
}
|
|
}
|
|
|
|
/* Set up the socket for tcp6 and rpcb register it. */
|
|
if (tcpflag && ip6flag) {
|
|
rpcbreg = 0;
|
|
for (i = 0; i < bindhostc; i++) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
if (setbindhost(&ai_tcp6, bindhost[i], hints) == 0) {
|
|
rpcbreg = 1;
|
|
rpcbregcnt++;
|
|
if ((tcp6sock = socket(ai_tcp6->ai_family,
|
|
ai_tcp6->ai_socktype,
|
|
ai_tcp6->ai_protocol)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't create tcp6 socket");
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(tcp6sock, SOL_SOCKET,
|
|
SO_REUSEADDR,
|
|
(char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR,
|
|
"setsockopt SO_REUSEADDR: %m");
|
|
if (setsockopt(tcp6sock, IPPROTO_IPV6,
|
|
IPV6_V6ONLY, &on, sizeof on) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't set v6-only binding for tcp6 "
|
|
"socket: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
if (bind(tcp6sock, ai_tcp6->ai_addr,
|
|
ai_tcp6->ai_addrlen) < 0) {
|
|
syslog(LOG_ERR,
|
|
"can't bind tcp6 addr %s: %m",
|
|
bindhost[i]);
|
|
nfsd_exit(1);
|
|
}
|
|
if (listen(tcp6sock, 5) < 0) {
|
|
syslog(LOG_ERR, "listen failed");
|
|
nfsd_exit(1);
|
|
}
|
|
freeaddrinfo(ai_tcp6);
|
|
FD_SET(tcp6sock, &sockbits);
|
|
FD_SET(tcp6sock, &v6bits);
|
|
if (maxsock < tcp6sock)
|
|
maxsock = tcp6sock;
|
|
connect_type_cnt++;
|
|
}
|
|
}
|
|
if (rpcbreg == 1) {
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
ecode = getaddrinfo(NULL, "nfs", &hints, &ai_tcp6);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo tcp6: %s",
|
|
gai_strerror(ecode));
|
|
nfsd_exit(1);
|
|
}
|
|
nconf_tcp6 = getnetconfigent("tcp6");
|
|
if (nconf_tcp6 == NULL)
|
|
err(1, "getnetconfigent tcp6 failed");
|
|
nb_tcp6.buf = ai_tcp6->ai_addr;
|
|
nb_tcp6.len = nb_tcp6.maxlen = ai_tcp6->ai_addrlen;
|
|
if ((!rpcb_set(RPCPROG_NFS, 2, nconf_tcp6, &nb_tcp6)) ||
|
|
(!rpcb_set(RPCPROG_NFS, 3, nconf_tcp6, &nb_tcp6)))
|
|
err(1, "rpcb_set tcp6 failed");
|
|
freeaddrinfo(ai_tcp6);
|
|
}
|
|
}
|
|
|
|
if (rpcbregcnt == 0) {
|
|
syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
|
|
if (tcpflag && connect_type_cnt == 0) {
|
|
syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m");
|
|
nfsd_exit(1);
|
|
}
|
|
|
|
setproctitle("master");
|
|
/*
|
|
* We always want a master to have a clean way to to shut nfsd down
|
|
* (with unregistration): if the master is killed, it unregisters and
|
|
* kills all children. If we run for UDP only (and so do not have to
|
|
* loop waiting waiting for accept), we instead make the parent
|
|
* a "server" too. start_server will not return.
|
|
*/
|
|
if (!tcpflag)
|
|
start_server(1);
|
|
|
|
/*
|
|
* Loop forever accepting connections and passing the sockets
|
|
* into the kernel for the mounts.
|
|
*/
|
|
for (;;) {
|
|
ready = sockbits;
|
|
if (connect_type_cnt > 1) {
|
|
if (select(maxsock + 1,
|
|
&ready, NULL, NULL, NULL) < 1) {
|
|
syslog(LOG_ERR, "select failed: %m");
|
|
if (errno == EINTR)
|
|
continue;
|
|
nfsd_exit(1);
|
|
}
|
|
}
|
|
for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) {
|
|
if (FD_ISSET(tcpsock, &ready)) {
|
|
if (FD_ISSET(tcpsock, &v4bits)) {
|
|
len = sizeof(inetpeer);
|
|
if ((msgsock = accept(tcpsock,
|
|
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
|
syslog(LOG_ERR, "accept failed: %m");
|
|
if (errno == ECONNABORTED ||
|
|
errno == EINTR)
|
|
continue;
|
|
nfsd_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");
|
|
addsockargs.sock = msgsock;
|
|
addsockargs.name = (caddr_t)&inetpeer;
|
|
addsockargs.namelen = len;
|
|
nfssvc(nfssvc_addsock, &addsockargs);
|
|
(void)close(msgsock);
|
|
} else if (FD_ISSET(tcpsock, &v6bits)) {
|
|
len = sizeof(inet6peer);
|
|
if ((msgsock = accept(tcpsock,
|
|
(struct sockaddr *)&inet6peer,
|
|
&len)) < 0) {
|
|
syslog(LOG_ERR,
|
|
"accept failed: %m");
|
|
if (errno == ECONNABORTED ||
|
|
errno == EINTR)
|
|
continue;
|
|
nfsd_exit(1);
|
|
}
|
|
if (setsockopt(msgsock, SOL_SOCKET,
|
|
SO_KEEPALIVE, (char *)&on,
|
|
sizeof(on)) < 0)
|
|
syslog(LOG_ERR, "setsockopt "
|
|
"SO_KEEPALIVE: %m");
|
|
addsockargs.sock = msgsock;
|
|
addsockargs.name = (caddr_t)&inet6peer;
|
|
addsockargs.namelen = len;
|
|
nfssvc(nfssvc_addsock, &addsockargs);
|
|
(void)close(msgsock);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
setbindhost(struct addrinfo **ai, const char *bindhost, struct addrinfo hints)
|
|
{
|
|
int ecode;
|
|
u_int32_t host_addr[4]; /* IPv4 or IPv6 */
|
|
const char *hostptr;
|
|
|
|
if (bindhost == NULL || strcmp("*", bindhost) == 0)
|
|
hostptr = NULL;
|
|
else
|
|
hostptr = bindhost;
|
|
|
|
if (hostptr != NULL) {
|
|
switch (hints.ai_family) {
|
|
case AF_INET:
|
|
if (inet_pton(AF_INET, hostptr, host_addr) == 1) {
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
} else {
|
|
if (inet_pton(AF_INET6, hostptr,
|
|
host_addr) == 1)
|
|
return (1);
|
|
}
|
|
break;
|
|
case AF_INET6:
|
|
if (inet_pton(AF_INET6, hostptr, host_addr) == 1) {
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
} else {
|
|
if (inet_pton(AF_INET, hostptr,
|
|
host_addr) == 1)
|
|
return (1);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
ecode = getaddrinfo(hostptr, "nfs", &hints, ai);
|
|
if (ecode != 0) {
|
|
syslog(LOG_ERR, "getaddrinfo %s: %s", bindhost,
|
|
gai_strerror(ecode));
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: nfsd %s\n", USAGE);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
nonfs(__unused int signo)
|
|
{
|
|
syslog(LOG_ERR, "missing system call: NFS not available");
|
|
}
|
|
|
|
void
|
|
reapchild(__unused int signo)
|
|
{
|
|
pid_t pid;
|
|
int i;
|
|
|
|
while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
|
|
for (i = 0; i < nfsdcnt; i++)
|
|
if (pid == children[i])
|
|
children[i] = -1;
|
|
}
|
|
}
|
|
|
|
void
|
|
unregistration()
|
|
{
|
|
if ((!rpcb_unset(RPCPROG_NFS, 2, NULL)) ||
|
|
(!rpcb_unset(RPCPROG_NFS, 3, NULL)))
|
|
syslog(LOG_ERR, "rpcb_unset failed");
|
|
}
|
|
|
|
void
|
|
killchildren()
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nfsdcnt; i++) {
|
|
if (children[i] > 0)
|
|
kill(children[i], SIGKILL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cleanup master after SIGUSR1.
|
|
*/
|
|
void
|
|
cleanup(__unused int signo)
|
|
{
|
|
nfsd_exit(0);
|
|
}
|
|
|
|
/*
|
|
* Cleanup child after SIGUSR1.
|
|
*/
|
|
void
|
|
child_cleanup(__unused int signo)
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
void
|
|
nfsd_exit(int status)
|
|
{
|
|
killchildren();
|
|
unregistration();
|
|
exit(status);
|
|
}
|
|
|
|
void
|
|
start_server(int master)
|
|
{
|
|
char principal[MAXHOSTNAMELEN + 5];
|
|
struct nfsd_nfsd_args nfsdargs;
|
|
int status, error;
|
|
char hostname[MAXHOSTNAMELEN + 1], *cp;
|
|
struct addrinfo *aip, hints;
|
|
|
|
status = 0;
|
|
if (new_syscall) {
|
|
gethostname(hostname, sizeof (hostname));
|
|
snprintf(principal, sizeof (principal), "nfs@%s", hostname);
|
|
if ((cp = strchr(hostname, '.')) == NULL ||
|
|
*(cp + 1) == '\0') {
|
|
/* If not fully qualified, try getaddrinfo() */
|
|
memset((void *)&hints, 0, sizeof (hints));
|
|
hints.ai_flags = AI_CANONNAME;
|
|
error = getaddrinfo(hostname, NULL, &hints, &aip);
|
|
if (error == 0) {
|
|
if (aip->ai_canonname != NULL &&
|
|
(cp = strchr(aip->ai_canonname, '.')) !=
|
|
NULL && *(cp + 1) != '\0')
|
|
snprintf(principal, sizeof (principal),
|
|
"nfs@%s", aip->ai_canonname);
|
|
freeaddrinfo(aip);
|
|
}
|
|
}
|
|
nfsdargs.principal = principal;
|
|
nfsdargs.minthreads = nfsdcnt;
|
|
nfsdargs.maxthreads = nfsdcnt;
|
|
error = nfssvc(nfssvc_nfsd, &nfsdargs);
|
|
if (error < 0 && errno == EAUTH) {
|
|
/*
|
|
* This indicates that it could not register the
|
|
* rpcsec_gss credentials, usually because the
|
|
* gssd daemon isn't running.
|
|
* (only the experimental server with nfsv4)
|
|
*/
|
|
syslog(LOG_ERR, "No gssd, using AUTH_SYS only");
|
|
principal[0] = '\0';
|
|
error = nfssvc(nfssvc_nfsd, &nfsdargs);
|
|
}
|
|
if (error < 0) {
|
|
syslog(LOG_ERR, "nfssvc: %m");
|
|
status = 1;
|
|
}
|
|
} else {
|
|
if (nfssvc(NFSSVC_OLDNFSD, NULL) < 0) {
|
|
syslog(LOG_ERR, "nfssvc: %m");
|
|
status = 1;
|
|
}
|
|
}
|
|
if (master)
|
|
nfsd_exit(status);
|
|
else
|
|
exit(status);
|
|
}
|