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freebsd-dev/sbin/nfsd/nfsd.c
Peter Wemm 37436e4075 Make this compile and not segfault on ia64. ptr = strdup("foo"); is 
fatal if the declaration of strdup() isn't in scope.  The upper 32 bits
of the pointer are lost since it defaults to returning "int".  Fix some
warnings while here, including trying to make gcc-3.1 happy.
2002-05-01 06:49:43 +00:00

846 lines
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C
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/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)nfsd.c 8.9 (Berkeley) 3/29/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/syslog.h>
#include <sys/wait.h>
#include <sys/mount.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfsserver/nfs.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
/* Global defs */
#ifdef DEBUG
#define syslog(e, s...) fprintf(stderr,s)
int debug = 1;
#else
int debug = 0;
#endif
struct nfsd_srvargs nsd;
#define MAXNFSDCNT 20
#define DEFNFSDCNT 4
pid_t children[MAXNFSDCNT]; /* PIDs of children */
int nfsdcnt; /* number of children */
void cleanup(int);
void child_cleanup(int);
void killchildren(void);
void nfsd_exit(int);
void nonfs(int);
void reapchild(int);
int setbindhost(struct addrinfo **ia, const char *bindhost,
struct addrinfo hints);
void start_server(int);
void unregistration(void);
void usage(void);
/*
* Nfs server daemon mostly just a user context for nfssvc()
*
* 1 - do file descriptor and signal cleanup
* 2 - fork the nfsd(s)
* 3 - create server socket(s)
* 4 - register socket with rpcbind
*
* For connectionless protocols, just pass the socket into the kernel via.
* nfssvc().
* For connection based sockets, loop doing accepts. When you get a new
* socket from accept, pass the msgsock into the kernel via. nfssvc().
* The arguments are:
* -r - reregister with rpcbind
* -d - unregister with rpcbind
* -t - support tcp nfs clients
* -u - support udp nfs clients
* followed by "n" which is the number of nfsds' to fork off
*/
int
main(argc, argv, envp)
int argc;
char *argv[], *envp[];
{
struct nfsd_args nfsdargs;
struct addrinfo *ai_udp, *ai_tcp, *ai_udp6, *ai_tcp6, hints;
struct netconfig *nconf_udp, *nconf_tcp, *nconf_udp6, *nconf_tcp6;
struct netbuf nb_udp, nb_tcp, nb_udp6, nb_tcp6;
struct sockaddr_in inetpeer;
struct sockaddr_in6 inet6peer;
fd_set ready, sockbits;
fd_set v4bits, v6bits;
int ch, connect_type_cnt, i, len, maxsock, msgsock;
int on = 1, unregister, reregister, sock;
int tcp6sock, ip6flag, tcpflag, tcpsock;
int udpflag, ecode, s, srvcnt;
int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
char **bindhost = NULL;
pid_t pid;
if (modfind("nfsserver") < 0) {
/* Not present in kernel, try loading it */
if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0)
errx(1, "NFS serveris not available");
}
nfsdcnt = DEFNFSDCNT;
unregister = reregister = tcpflag = maxsock = 0;
bindanyflag = udpflag = connect_type_cnt = bindhostc = 0;
#define GETOPT "ah:n:rdtu"
#define USAGE "[-ardtu] [-n num_servers] [-h bindip]"
while ((ch = getopt(argc, argv, GETOPT)) != -1)
switch (ch) {
case 'a':
bindanyflag = 1;
break;
case 'n':
nfsdcnt = atoi(optarg);
if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
warnx("nfsd count %d; reset to %d", nfsdcnt,
DEFNFSDCNT);
nfsdcnt = DEFNFSDCNT;
}
break;
case 'h':
bindhostc++;
bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
if (bindhost == NULL)
errx(1, "Out of memory");
bindhost[bindhostc-1] = strdup(optarg);
if (bindhost[bindhostc-1] == NULL)
errx(1, "Out of memory");
break;
case 'r':
reregister = 1;
break;
case 'd':
unregister = 1;
break;
case 't':
tcpflag = 1;
break;
case 'u':
udpflag = 1;
break;
default:
case '?':
usage();
};
if (!tcpflag && !udpflag)
udpflag = 1;
argv += optind;
argc -= optind;
/*
* XXX
* Backward compatibility, trailing number is the count of daemons.
*/
if (argc > 1)
usage();
if (argc == 1) {
nfsdcnt = atoi(argv[0]);
if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
warnx("nfsd count %d; reset to %d", nfsdcnt,
DEFNFSDCNT);
nfsdcnt = DEFNFSDCNT;
}
}
ip6flag = 1;
s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (s == -1) {
if (errno != EPROTONOSUPPORT)
err(1, "socket");
ip6flag = 0;
} else if (getnetconfigent("udp6") == NULL ||
getnetconfigent("tcp6") == NULL) {
ip6flag = 0;
}
if (s != -1)
close(s);
if (bindhostc == 0 || bindanyflag) {
bindhostc++;
bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
if (bindhost == NULL)
errx(1, "Out of memory");
bindhost[bindhostc-1] = strdup("*");
if (bindhost[bindhostc-1] == NULL)
errx(1, "Out of memory");
}
if (unregister) {
unregistration();
exit (0);
}
if (reregister) {
if (udpflag) {
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)
err(1, "getaddrinfo udp: %s", gai_strerror(ecode));
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);
}
if (udpflag && ip6flag) {
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)
err(1, "getaddrinfo udp6: %s", gai_strerror(ecode));
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);
}
if (tcpflag) {
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)
err(1, "getaddrinfo tcp: %s", gai_strerror(ecode));
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);
}
if (tcpflag && ip6flag) {
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)
err(1, "getaddrinfo tcp6: %s", gai_strerror(ecode));
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);
}
exit (0);
}
if (debug == 0) {
daemon(0, 0);
(void)signal(SIGHUP, SIG_IGN);
(void)signal(SIGINT, SIG_IGN);
/*
* nfsd sits in the kernel most of the time. It needs
* to ignore SIGTERM/SIGQUIT in order to stay alive as long
* as possible during a shutdown, otherwise loopback
* mounts will not be able to unmount.
*/
(void)signal(SIGTERM, SIG_IGN);
(void)signal(SIGQUIT, SIG_IGN);
}
(void)signal(SIGSYS, nonfs);
(void)signal(SIGCHLD, reapchild);
openlog("nfsd", LOG_PID, LOG_DAEMON);
/* If we use UDP only, we start the last server below. */
srvcnt = tcpflag ? nfsdcnt : nfsdcnt - 1;
for (i = 0; i < srvcnt; i++) {
switch ((pid = fork())) {
case -1:
syslog(LOG_ERR, "fork: %m");
nfsd_exit(1);
case 0:
break;
default:
children[i] = pid;
continue;
}
(void)signal(SIGUSR1, child_cleanup);
setproctitle("server");
start_server(0);
}
(void)signal(SIGUSR1, cleanup);
FD_ZERO(&v4bits);
FD_ZERO(&v6bits);
rpcbregcnt = 0;
/* Set up the socket for udp and rpcb register it. */
if (udpflag) {
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_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
if (setbindhost(&ai_udp, bindhost[i], hints) == 0) {
rpcbreg = 1;
rpcbregcnt++;
if ((sock = socket(ai_udp->ai_family,
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);
nfsdargs.sock = sock;
nfsdargs.name = NULL;
nfsdargs.namelen = 0;
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 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_BINDV6ONLY,
&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);
nfsdargs.sock = sock;
nfsdargs.name = NULL;
nfsdargs.namelen = 0;
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 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_BINDV6ONLY, &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");
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");
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");
nfsdargs.sock = msgsock;
nfsdargs.name = (caddr_t)&inetpeer;
nfsdargs.namelen = len;
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
(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");
nfsd_exit(1);
}
if (setsockopt(msgsock, SOL_SOCKET,
SO_KEEPALIVE, (char *)&on,
sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt "
"SO_KEEPALIVE: %m");
nfsdargs.sock = msgsock;
nfsdargs.name = (caddr_t)&inet6peer;
nfsdargs.namelen = len;
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
(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(signo)
int signo;
{
syslog(LOG_ERR, "missing system call: NFS not available");
}
void
reapchild(signo)
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(signo)
{
nfsd_exit(0);
}
/*
* Cleanup child after SIGUSR1.
*/
void
child_cleanup(signo)
{
exit(0);
}
void
nfsd_exit(int status)
{
killchildren();
unregistration();
exit(status);
}
void
start_server(int master)
{
int status;
status = 0;
nsd.nsd_nfsd = NULL;
if (nfssvc(NFSSVC_NFSD, &nsd) < 0) {
syslog(LOG_ERR, "nfssvc: %m");
status = 1;
}
if (master)
nfsd_exit(status);
else
exit(status);
}
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