1087 lines
29 KiB
C
1087 lines
29 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 <sys/types.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/ucred.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <rpcsvc/nfs_prot.h>
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#include <netdb.h>
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#include <arpa/inet.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 <sysexits.h>
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#include <getopt.h>
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static int debug = 0;
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#define NFSD_STABLERESTART "/var/db/nfs-stablerestart"
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#define NFSD_STABLEBACKUP "/var/db/nfs-stablerestart.bak"
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#define MAXNFSDCNT 256
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#define DEFNFSDCNT 4
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static pid_t children[MAXNFSDCNT]; /* PIDs of children */
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static int nfsdcnt; /* number of children */
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static int nfsdcnt_set;
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static int minthreads;
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static int maxthreads;
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static int nfssvc_nfsd; /* Set to correct NFSSVC_xxx flag */
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static int stablefd = -1; /* Fd for the stable restart file */
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static int backupfd; /* Fd for the backup stable restart file */
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static const char *getopt_shortopts;
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static const char *getopt_usage;
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static int minthreads_set;
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static int maxthreads_set;
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static struct option longopts[] = {
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{ "debug", no_argument, &debug, 1 },
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{ "minthreads", required_argument, &minthreads_set, 1 },
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{ "maxthreads", required_argument, &maxthreads_set, 1 },
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{ NULL, 0, NULL, 0}
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};
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static void cleanup(int);
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static void child_cleanup(int);
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static void killchildren(void);
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static void nfsd_exit(int);
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static void nonfs(int);
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static void reapchild(int);
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static int setbindhost(struct addrinfo **ia, const char *bindhost,
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struct addrinfo hints);
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static void start_server(int);
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static void unregistration(void);
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static void usage(void);
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static void open_stable(int *, int *);
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static void copy_stable(int, int);
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static void backup_stable(int);
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static void set_nfsdcnt(int);
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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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* -e - 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, error, s;
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int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
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int nfssvc_addsock;
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int longindex = 0;
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const char *lopt;
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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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getopt_shortopts = "ah:n:rdtue";
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getopt_usage =
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"usage:\n"
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" nfsd [-ardtue] [-h bindip]\n"
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" [-n numservers] [--minthreads #] [--maxthreads #]\n";
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while ((ch = getopt_long(argc, argv, getopt_shortopts, longopts,
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&longindex)) != -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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set_nfsdcnt(atoi(optarg));
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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 'e':
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/* now a no-op, since this is the default */
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break;
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case 0:
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lopt = longopts[longindex].name;
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if (!strcmp(lopt, "minthreads")) {
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minthreads = atoi(optarg);
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} else if (!strcmp(lopt, "maxthreads")) {
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maxthreads = atoi(optarg);
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}
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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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if (minthreads_set && maxthreads_set && minthreads > maxthreads)
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errx(EX_USAGE,
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"error: minthreads(%d) can't be greater than "
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"maxthreads(%d)", minthreads, maxthreads);
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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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set_nfsdcnt(atoi(argv[0]));
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/*
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* Unless the "-o" option was specified, try and run "nfsd".
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* If "-o" was specified, try and run "nfsserver".
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*/
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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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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 && errno != EAFNOSUPPORT)
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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(NFS_PROGRAM, 2, nconf_udp, &nb_udp)) ||
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(!rpcb_set(NFS_PROGRAM, 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(NFS_PROGRAM, 2, nconf_udp6, &nb_udp6)) ||
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(!rpcb_set(NFS_PROGRAM, 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(NFS_PROGRAM, 2, nconf_tcp, &nb_tcp)) ||
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(!rpcb_set(NFS_PROGRAM, 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(NFS_PROGRAM, 2, nconf_tcp6, &nb_tcp6)) ||
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(!rpcb_set(NFS_PROGRAM, 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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(void)signal(SIGUSR2, backup_stable);
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openlog("nfsd", LOG_PID | (debug ? LOG_PERROR : 0), 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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* It and the backup copy will be created as empty files
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* the first time this nfsd is started and should never be
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* deleted/replaced 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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open_stable(&stablefd, &backupfd);
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if (stablefd < 0) {
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syslog(LOG_ERR, "Can't open %s: %m\n", NFSD_STABLERESTART);
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exit(1);
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}
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/* This system call will fail for old kernels, but that's ok. */
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nfssvc(NFSSVC_BACKUPSTABLE, NULL);
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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: %m\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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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,
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ai_udp->ai_protocol)) < 0) {
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syslog(LOG_ERR,
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"can't create udp socket");
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nfsd_exit(1);
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}
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if (bind(sock, ai_udp->ai_addr,
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ai_udp->ai_addrlen) < 0) {
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syslog(LOG_ERR,
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"can't bind udp addr %s: %m",
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bindhost[i]);
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nfsd_exit(1);
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}
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freeaddrinfo(ai_udp);
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addsockargs.sock = sock;
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addsockargs.name = NULL;
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addsockargs.namelen = 0;
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if (nfssvc(nfssvc_addsock, &addsockargs) < 0) {
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syslog(LOG_ERR, "can't Add UDP socket");
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nfsd_exit(1);
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}
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(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(NFS_PROGRAM, 2, nconf_udp, &nb_udp)) ||
|
|
(!rpcb_set(NFS_PROGRAM, 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(NFS_PROGRAM, 2, nconf_udp6, &nb_udp6)) ||
|
|
(!rpcb_set(NFS_PROGRAM, 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 tcp 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, -1) < 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(NFS_PROGRAM, 2, nconf_tcp,
|
|
&nb_tcp)) || (!rpcb_set(NFS_PROGRAM, 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, -1) < 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(NFS_PROGRAM, 2, nconf_tcp6, &nb_tcp6)) ||
|
|
(!rpcb_set(NFS_PROGRAM, 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) {
|
|
error = errno;
|
|
if (error == EINTR)
|
|
continue;
|
|
syslog(LOG_ERR, "select failed: %m");
|
|
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) {
|
|
error = errno;
|
|
syslog(LOG_ERR, "accept failed: %m");
|
|
if (error == ECONNABORTED ||
|
|
error == 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) {
|
|
error = errno;
|
|
syslog(LOG_ERR,
|
|
"accept failed: %m");
|
|
if (error == ECONNABORTED ||
|
|
error == 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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static void
|
|
set_nfsdcnt(int proposed)
|
|
{
|
|
|
|
if (proposed < 1) {
|
|
warnx("nfsd count too low %d; reset to %d", proposed,
|
|
DEFNFSDCNT);
|
|
nfsdcnt = DEFNFSDCNT;
|
|
} else if (proposed > MAXNFSDCNT) {
|
|
warnx("nfsd count too high %d; truncated to %d", proposed,
|
|
MAXNFSDCNT);
|
|
nfsdcnt = MAXNFSDCNT;
|
|
} else
|
|
nfsdcnt = proposed;
|
|
nfsdcnt_set = 1;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "%s", getopt_usage);
|
|
exit(1);
|
|
}
|
|
|
|
static void
|
|
nonfs(__unused int signo)
|
|
{
|
|
syslog(LOG_ERR, "missing system call: NFS not available");
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
}
|
|
|
|
static void
|
|
unregistration(void)
|
|
{
|
|
if ((!rpcb_unset(NFS_PROGRAM, 2, NULL)) ||
|
|
(!rpcb_unset(NFS_PROGRAM, 3, NULL)))
|
|
syslog(LOG_ERR, "rpcb_unset failed");
|
|
}
|
|
|
|
static void
|
|
killchildren(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nfsdcnt; i++) {
|
|
if (children[i] > 0)
|
|
kill(children[i], SIGKILL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cleanup master after SIGUSR1.
|
|
*/
|
|
static void
|
|
cleanup(__unused int signo)
|
|
{
|
|
nfsd_exit(0);
|
|
}
|
|
|
|
/*
|
|
* Cleanup child after SIGUSR1.
|
|
*/
|
|
static void
|
|
child_cleanup(__unused int signo)
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
nfsd_exit(int status)
|
|
{
|
|
killchildren();
|
|
unregistration();
|
|
exit(status);
|
|
}
|
|
|
|
static int
|
|
get_tuned_nfsdcount(void)
|
|
{
|
|
int ncpu, error, tuned_nfsdcnt;
|
|
size_t ncpu_size;
|
|
|
|
ncpu_size = sizeof(ncpu);
|
|
error = sysctlbyname("hw.ncpu", &ncpu, &ncpu_size, NULL, 0);
|
|
if (error) {
|
|
warnx("sysctlbyname(hw.ncpu) failed defaulting to %d nfs servers",
|
|
DEFNFSDCNT);
|
|
tuned_nfsdcnt = DEFNFSDCNT;
|
|
} else {
|
|
tuned_nfsdcnt = ncpu * 8;
|
|
}
|
|
return tuned_nfsdcnt;
|
|
}
|
|
|
|
static 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;
|
|
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;
|
|
|
|
if (nfsdcnt_set)
|
|
nfsdargs.minthreads = nfsdargs.maxthreads = nfsdcnt;
|
|
else {
|
|
nfsdargs.minthreads = minthreads_set ? minthreads : get_tuned_nfsdcount();
|
|
nfsdargs.maxthreads = maxthreads_set ? maxthreads : nfsdargs.minthreads;
|
|
if (nfsdargs.maxthreads < nfsdargs.minthreads)
|
|
nfsdargs.maxthreads = nfsdargs.minthreads;
|
|
}
|
|
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;
|
|
}
|
|
if (master)
|
|
nfsd_exit(status);
|
|
else
|
|
exit(status);
|
|
}
|
|
|
|
/*
|
|
* Open the stable restart file and return the file descriptor for it.
|
|
*/
|
|
static void
|
|
open_stable(int *stable_fdp, int *backup_fdp)
|
|
{
|
|
int stable_fd, backup_fd = -1, ret;
|
|
struct stat st, backup_st;
|
|
|
|
/* Open and stat the stable restart file. */
|
|
stable_fd = open(NFSD_STABLERESTART, O_RDWR, 0);
|
|
if (stable_fd < 0)
|
|
stable_fd = open(NFSD_STABLERESTART, O_RDWR | O_CREAT, 0600);
|
|
if (stable_fd >= 0) {
|
|
ret = fstat(stable_fd, &st);
|
|
if (ret < 0) {
|
|
close(stable_fd);
|
|
stable_fd = -1;
|
|
}
|
|
}
|
|
|
|
/* Open and stat the backup stable restart file. */
|
|
if (stable_fd >= 0) {
|
|
backup_fd = open(NFSD_STABLEBACKUP, O_RDWR, 0);
|
|
if (backup_fd < 0)
|
|
backup_fd = open(NFSD_STABLEBACKUP, O_RDWR | O_CREAT,
|
|
0600);
|
|
if (backup_fd >= 0) {
|
|
ret = fstat(backup_fd, &backup_st);
|
|
if (ret < 0) {
|
|
close(backup_fd);
|
|
backup_fd = -1;
|
|
}
|
|
}
|
|
if (backup_fd < 0) {
|
|
close(stable_fd);
|
|
stable_fd = -1;
|
|
}
|
|
}
|
|
|
|
*stable_fdp = stable_fd;
|
|
*backup_fdp = backup_fd;
|
|
if (stable_fd < 0)
|
|
return;
|
|
|
|
/* Sync up the 2 files, as required. */
|
|
if (st.st_size > 0)
|
|
copy_stable(stable_fd, backup_fd);
|
|
else if (backup_st.st_size > 0)
|
|
copy_stable(backup_fd, stable_fd);
|
|
}
|
|
|
|
/*
|
|
* Copy the stable restart file to the backup or vice versa.
|
|
*/
|
|
static void
|
|
copy_stable(int from_fd, int to_fd)
|
|
{
|
|
int cnt, ret;
|
|
static char buf[1024];
|
|
|
|
ret = lseek(from_fd, (off_t)0, SEEK_SET);
|
|
if (ret >= 0)
|
|
ret = lseek(to_fd, (off_t)0, SEEK_SET);
|
|
if (ret >= 0)
|
|
ret = ftruncate(to_fd, (off_t)0);
|
|
if (ret >= 0)
|
|
do {
|
|
cnt = read(from_fd, buf, 1024);
|
|
if (cnt > 0)
|
|
ret = write(to_fd, buf, cnt);
|
|
else if (cnt < 0)
|
|
ret = cnt;
|
|
} while (cnt > 0 && ret >= 0);
|
|
if (ret >= 0)
|
|
ret = fsync(to_fd);
|
|
if (ret < 0)
|
|
syslog(LOG_ERR, "stable restart copy failure: %m");
|
|
}
|
|
|
|
/*
|
|
* Back up the stable restart file when indicated by the kernel.
|
|
*/
|
|
static void
|
|
backup_stable(__unused int signo)
|
|
{
|
|
|
|
if (stablefd >= 0)
|
|
copy_stable(stablefd, backupfd);
|
|
}
|
|
|