When nfsd was started with only UDP servers, the master nfsd would
spin in a loop eating CPU time. This bug has existed since the TI-RPC import. The problem is that we should only enter the select loop if at least one TCP server was started. Fix this by having the master nfsd become a UDP server itself if there are no TCP servers. Also improve/correct the code for cleaning up slave nfsd processes and unregistering with rpcbind when the master nfsd exits. One issue that remains open is that if a slave nfsd dies, then all nfsds will shut down. This is because nfssvc() in the master nfsd returns 0 when the master nfsd receives a SIGCHLD. Submitted by: tmm
This commit is contained in:
Ian Dowse
parent
446975de60
commit
fef7dd5a5f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=85034
184
sbin/nfsd/nfsd.c
184
sbin/nfsd/nfsd.c
@ -52,6 +52,8 @@ static const char rcsid[] =
|
||||
#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>
|
||||
@ -64,6 +66,7 @@ static const char rcsid[] =
|
||||
|
||||
#include <err.h>
|
||||
#include <errno.h>
|
||||
#include <signal.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <strings.h>
|
||||
@ -86,12 +89,16 @@ pid_t children[MAXNFSDCNT]; /* PIDs of children */
|
||||
int nfsdcnt; /* number of children */
|
||||
|
||||
void cleanup(int);
|
||||
void child_cleanup(int);
|
||||
void killchildren(void);
|
||||
void nonfs (int);
|
||||
void reapchild (int);
|
||||
int setbindhost (struct addrinfo **ia, const char *bindhost, struct addrinfo hints);
|
||||
void unregistration (void);
|
||||
void usage (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()
|
||||
@ -126,13 +133,12 @@ main(argc, argv, envp)
|
||||
fd_set ready, sockbits;
|
||||
fd_set v4bits, v6bits;
|
||||
int ch, connect_type_cnt, i, len, maxsock, msgsock;
|
||||
int nfssvc_flag, on = 1, unregister, reregister, sock;
|
||||
int on = 1, unregister, reregister, sock;
|
||||
int tcp6sock, ip6flag, tcpflag, tcpsock;
|
||||
int udpflag, ecode, s;
|
||||
int bindhostc = 0, bindanyflag, rpcbreg, rpcbregcnt;
|
||||
int udpflag, ecode, s, srvcnt;
|
||||
int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
|
||||
char **bindhost = NULL;
|
||||
pid_t pid;
|
||||
int error;
|
||||
|
||||
if (modfind("nfsserver") < 0) {
|
||||
/* Not present in kernel, try loading it */
|
||||
@ -141,8 +147,8 @@ main(argc, argv, envp)
|
||||
}
|
||||
|
||||
nfsdcnt = DEFNFSDCNT;
|
||||
unregister = reregister = tcpflag = 0;
|
||||
bindanyflag = udpflag;
|
||||
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)
|
||||
@ -313,8 +319,6 @@ main(argc, argv, envp)
|
||||
daemon(0, 0);
|
||||
(void)signal(SIGHUP, SIG_IGN);
|
||||
(void)signal(SIGINT, SIG_IGN);
|
||||
(void)signal(SIGSYS, nonfs);
|
||||
(void)signal(SIGUSR1, cleanup);
|
||||
/*
|
||||
* nfsd sits in the kernel most of the time. It needs
|
||||
* to ignore SIGTERM/SIGQUIT in order to stay alive as long
|
||||
@ -324,40 +328,31 @@ main(argc, argv, envp)
|
||||
(void)signal(SIGTERM, SIG_IGN);
|
||||
(void)signal(SIGQUIT, SIG_IGN);
|
||||
}
|
||||
(void)signal(SIGSYS, nonfs);
|
||||
(void)signal(SIGCHLD, reapchild);
|
||||
|
||||
openlog("nfsd:", LOG_PID, LOG_DAEMON);
|
||||
openlog("nfsd", LOG_PID, LOG_DAEMON);
|
||||
|
||||
for (i = 0; i < nfsdcnt; i++) {
|
||||
/* 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");
|
||||
killchildren();
|
||||
exit (1);
|
||||
nfsd_exit(1);
|
||||
case 0:
|
||||
break;
|
||||
default:
|
||||
children[i] = pid;
|
||||
continue;
|
||||
}
|
||||
|
||||
(void)signal(SIGUSR1, child_cleanup);
|
||||
setproctitle("server");
|
||||
nfssvc_flag = NFSSVC_NFSD;
|
||||
nsd.nsd_nfsd = NULL;
|
||||
while (nfssvc(nfssvc_flag, &nsd) < 0) {
|
||||
if (errno) {
|
||||
syslog(LOG_ERR, "nfssvc: %m");
|
||||
exit(1);
|
||||
}
|
||||
nfssvc_flag = NFSSVC_NFSD;
|
||||
}
|
||||
exit(0);
|
||||
|
||||
start_server(0);
|
||||
}
|
||||
|
||||
if (atexit(killchildren) == -1) {
|
||||
syslog(LOG_ERR, "atexit: %s", strerror(errno));
|
||||
exit(1);
|
||||
}
|
||||
(void)signal(SIGUSR1, cleanup);
|
||||
FD_ZERO(&v4bits);
|
||||
FD_ZERO(&v6bits);
|
||||
|
||||
@ -379,14 +374,14 @@ main(argc, argv, envp)
|
||||
ai_udp->ai_protocol)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create udp socket");
|
||||
exit(1);
|
||||
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]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_udp);
|
||||
nfsdargs.sock = sock;
|
||||
@ -394,7 +389,7 @@ main(argc, argv, envp)
|
||||
nfsdargs.namelen = 0;
|
||||
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
|
||||
syslog(LOG_ERR, "can't Add UDP socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
(void)close(sock);
|
||||
}
|
||||
@ -409,7 +404,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo udp: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_udp = getnetconfigent("udp");
|
||||
if (nconf_udp == NULL)
|
||||
@ -440,7 +435,7 @@ main(argc, argv, envp)
|
||||
ai_udp6->ai_protocol)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create udp6 socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(sock, IPPROTO_IPV6,
|
||||
IPV6_BINDV6ONLY,
|
||||
@ -448,14 +443,14 @@ main(argc, argv, envp)
|
||||
syslog(LOG_ERR,
|
||||
"can't set v6-only binding for "
|
||||
"udp6 socket: %m");
|
||||
exit(1);
|
||||
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]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_udp6);
|
||||
nfsdargs.sock = sock;
|
||||
@ -464,7 +459,7 @@ main(argc, argv, envp)
|
||||
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't add UDP6 socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
(void)close(sock);
|
||||
}
|
||||
@ -479,7 +474,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo udp6: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_udp6 = getnetconfigent("udp6");
|
||||
if (nconf_udp6 == NULL)
|
||||
@ -509,7 +504,7 @@ main(argc, argv, envp)
|
||||
0)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create tpc socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(tcpsock, SOL_SOCKET,
|
||||
SO_REUSEADDR,
|
||||
@ -521,11 +516,11 @@ main(argc, argv, envp)
|
||||
syslog(LOG_ERR,
|
||||
"can't bind tcp addr %s: %m",
|
||||
bindhost[i]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (listen(tcpsock, 5) < 0) {
|
||||
syslog(LOG_ERR, "listen failed");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_tcp);
|
||||
FD_SET(tcpsock, &sockbits);
|
||||
@ -545,7 +540,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo tcp: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_tcp = getnetconfigent("tcp");
|
||||
if (nconf_tcp == NULL)
|
||||
@ -577,7 +572,7 @@ main(argc, argv, envp)
|
||||
ai_tcp6->ai_protocol)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create tcp6 socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(tcp6sock, SOL_SOCKET,
|
||||
SO_REUSEADDR,
|
||||
@ -589,18 +584,18 @@ main(argc, argv, envp)
|
||||
syslog(LOG_ERR,
|
||||
"can't set v6-only binding for tcp6 "
|
||||
"socket: %m");
|
||||
exit(1);
|
||||
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]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (listen(tcp6sock, 5) < 0) {
|
||||
syslog(LOG_ERR, "listen failed");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_tcp6);
|
||||
FD_SET(tcp6sock, &sockbits);
|
||||
@ -620,7 +615,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo tcp6: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_tcp6 = getnetconfigent("tcp6");
|
||||
if (nconf_tcp6 == NULL)
|
||||
@ -636,15 +631,24 @@ main(argc, argv, envp)
|
||||
|
||||
if (rpcbregcnt == 0) {
|
||||
syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
|
||||
if ((tcpflag) && (connect_type_cnt == 0)) {
|
||||
if (tcpflag && connect_type_cnt == 0) {
|
||||
syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m");
|
||||
exit(1);
|
||||
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
|
||||
@ -656,7 +660,7 @@ main(argc, argv, envp)
|
||||
if (select(maxsock + 1,
|
||||
&ready, NULL, NULL, NULL) < 1) {
|
||||
syslog(LOG_ERR, "select failed: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
}
|
||||
for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) {
|
||||
@ -666,7 +670,7 @@ main(argc, argv, envp)
|
||||
if ((msgsock = accept(tcpsock,
|
||||
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
||||
syslog(LOG_ERR, "accept failed: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
memset(inetpeer.sin_zero, 0,
|
||||
sizeof(inetpeer.sin_zero));
|
||||
@ -676,7 +680,7 @@ main(argc, argv, envp)
|
||||
"setsockopt SO_KEEPALIVE: %m");
|
||||
nfsdargs.sock = msgsock;
|
||||
nfsdargs.name = (caddr_t)&inetpeer;
|
||||
nfsdargs.namelen = sizeof(inetpeer);
|
||||
nfsdargs.namelen = len;
|
||||
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
||||
(void)close(msgsock);
|
||||
} else if (FD_ISSET(tcpsock, &v6bits)) {
|
||||
@ -686,7 +690,7 @@ main(argc, argv, envp)
|
||||
&len)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"accept failed: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(msgsock, SOL_SOCKET,
|
||||
SO_KEEPALIVE, (char *)&on,
|
||||
@ -695,7 +699,7 @@ main(argc, argv, envp)
|
||||
"SO_KEEPALIVE: %m");
|
||||
nfsdargs.sock = msgsock;
|
||||
nfsdargs.name = (caddr_t)&inet6peer;
|
||||
nfsdargs.namelen = sizeof(inet6peer);
|
||||
nfsdargs.namelen = len;
|
||||
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
||||
(void)close(msgsock);
|
||||
}
|
||||
@ -767,8 +771,14 @@ void
|
||||
reapchild(signo)
|
||||
int signo;
|
||||
{
|
||||
pid_t pid;
|
||||
int i;
|
||||
|
||||
while (wait3(NULL, WNOHANG, NULL) > 0);
|
||||
while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
|
||||
for (i = 0; i < nfsdcnt; i++)
|
||||
if (pid == children[i])
|
||||
children[i] = -1;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
@ -783,32 +793,52 @@ void
|
||||
killchildren()
|
||||
{
|
||||
int i;
|
||||
sigset_t sigs;
|
||||
|
||||
sigemptyset(&sigs);
|
||||
/*
|
||||
* Block SIGCHLD to avoid killing a reaped process (although it is
|
||||
* unlikely, the pid might have been reused).
|
||||
*/
|
||||
sigaddset(&sigs, SIGCHLD);
|
||||
if (sigprocmask(SIG_BLOCK, &sigs, NULL) == -1) {
|
||||
syslog(LOG_ERR, "sigprocmask: %s",
|
||||
strerror(errno));
|
||||
return;
|
||||
}
|
||||
for (i = 0; i < nfsdcnt; i++) {
|
||||
if (children[i] > 0)
|
||||
kill(children[i], SIGKILL);
|
||||
}
|
||||
if (sigprocmask(SIG_UNBLOCK, &sigs, NULL) == -1) {
|
||||
syslog(LOG_ERR, "sigprocmask: %s", strerror(errno));
|
||||
}
|
||||
unregistration();
|
||||
}
|
||||
|
||||
/*
|
||||
* Cleanup master after SIGUSR1.
|
||||
*/
|
||||
void
|
||||
cleanup(signo)
|
||||
{
|
||||
killchildren();
|
||||
exit (0);
|
||||
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);
|
||||
}
|
||||
|
||||
@ -52,6 +52,8 @@ static const char rcsid[] =
|
||||
#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>
|
||||
@ -64,6 +66,7 @@ static const char rcsid[] =
|
||||
|
||||
#include <err.h>
|
||||
#include <errno.h>
|
||||
#include <signal.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <strings.h>
|
||||
@ -86,12 +89,16 @@ pid_t children[MAXNFSDCNT]; /* PIDs of children */
|
||||
int nfsdcnt; /* number of children */
|
||||
|
||||
void cleanup(int);
|
||||
void child_cleanup(int);
|
||||
void killchildren(void);
|
||||
void nonfs (int);
|
||||
void reapchild (int);
|
||||
int setbindhost (struct addrinfo **ia, const char *bindhost, struct addrinfo hints);
|
||||
void unregistration (void);
|
||||
void usage (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()
|
||||
@ -126,13 +133,12 @@ main(argc, argv, envp)
|
||||
fd_set ready, sockbits;
|
||||
fd_set v4bits, v6bits;
|
||||
int ch, connect_type_cnt, i, len, maxsock, msgsock;
|
||||
int nfssvc_flag, on = 1, unregister, reregister, sock;
|
||||
int on = 1, unregister, reregister, sock;
|
||||
int tcp6sock, ip6flag, tcpflag, tcpsock;
|
||||
int udpflag, ecode, s;
|
||||
int bindhostc = 0, bindanyflag, rpcbreg, rpcbregcnt;
|
||||
int udpflag, ecode, s, srvcnt;
|
||||
int bindhostc, bindanyflag, rpcbreg, rpcbregcnt;
|
||||
char **bindhost = NULL;
|
||||
pid_t pid;
|
||||
int error;
|
||||
|
||||
if (modfind("nfsserver") < 0) {
|
||||
/* Not present in kernel, try loading it */
|
||||
@ -141,8 +147,8 @@ main(argc, argv, envp)
|
||||
}
|
||||
|
||||
nfsdcnt = DEFNFSDCNT;
|
||||
unregister = reregister = tcpflag = 0;
|
||||
bindanyflag = udpflag;
|
||||
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)
|
||||
@ -313,8 +319,6 @@ main(argc, argv, envp)
|
||||
daemon(0, 0);
|
||||
(void)signal(SIGHUP, SIG_IGN);
|
||||
(void)signal(SIGINT, SIG_IGN);
|
||||
(void)signal(SIGSYS, nonfs);
|
||||
(void)signal(SIGUSR1, cleanup);
|
||||
/*
|
||||
* nfsd sits in the kernel most of the time. It needs
|
||||
* to ignore SIGTERM/SIGQUIT in order to stay alive as long
|
||||
@ -324,40 +328,31 @@ main(argc, argv, envp)
|
||||
(void)signal(SIGTERM, SIG_IGN);
|
||||
(void)signal(SIGQUIT, SIG_IGN);
|
||||
}
|
||||
(void)signal(SIGSYS, nonfs);
|
||||
(void)signal(SIGCHLD, reapchild);
|
||||
|
||||
openlog("nfsd:", LOG_PID, LOG_DAEMON);
|
||||
openlog("nfsd", LOG_PID, LOG_DAEMON);
|
||||
|
||||
for (i = 0; i < nfsdcnt; i++) {
|
||||
/* 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");
|
||||
killchildren();
|
||||
exit (1);
|
||||
nfsd_exit(1);
|
||||
case 0:
|
||||
break;
|
||||
default:
|
||||
children[i] = pid;
|
||||
continue;
|
||||
}
|
||||
|
||||
(void)signal(SIGUSR1, child_cleanup);
|
||||
setproctitle("server");
|
||||
nfssvc_flag = NFSSVC_NFSD;
|
||||
nsd.nsd_nfsd = NULL;
|
||||
while (nfssvc(nfssvc_flag, &nsd) < 0) {
|
||||
if (errno) {
|
||||
syslog(LOG_ERR, "nfssvc: %m");
|
||||
exit(1);
|
||||
}
|
||||
nfssvc_flag = NFSSVC_NFSD;
|
||||
}
|
||||
exit(0);
|
||||
|
||||
start_server(0);
|
||||
}
|
||||
|
||||
if (atexit(killchildren) == -1) {
|
||||
syslog(LOG_ERR, "atexit: %s", strerror(errno));
|
||||
exit(1);
|
||||
}
|
||||
(void)signal(SIGUSR1, cleanup);
|
||||
FD_ZERO(&v4bits);
|
||||
FD_ZERO(&v6bits);
|
||||
|
||||
@ -379,14 +374,14 @@ main(argc, argv, envp)
|
||||
ai_udp->ai_protocol)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create udp socket");
|
||||
exit(1);
|
||||
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]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_udp);
|
||||
nfsdargs.sock = sock;
|
||||
@ -394,7 +389,7 @@ main(argc, argv, envp)
|
||||
nfsdargs.namelen = 0;
|
||||
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
|
||||
syslog(LOG_ERR, "can't Add UDP socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
(void)close(sock);
|
||||
}
|
||||
@ -409,7 +404,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo udp: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_udp = getnetconfigent("udp");
|
||||
if (nconf_udp == NULL)
|
||||
@ -440,7 +435,7 @@ main(argc, argv, envp)
|
||||
ai_udp6->ai_protocol)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create udp6 socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(sock, IPPROTO_IPV6,
|
||||
IPV6_BINDV6ONLY,
|
||||
@ -448,14 +443,14 @@ main(argc, argv, envp)
|
||||
syslog(LOG_ERR,
|
||||
"can't set v6-only binding for "
|
||||
"udp6 socket: %m");
|
||||
exit(1);
|
||||
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]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_udp6);
|
||||
nfsdargs.sock = sock;
|
||||
@ -464,7 +459,7 @@ main(argc, argv, envp)
|
||||
if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't add UDP6 socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
(void)close(sock);
|
||||
}
|
||||
@ -479,7 +474,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo udp6: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_udp6 = getnetconfigent("udp6");
|
||||
if (nconf_udp6 == NULL)
|
||||
@ -509,7 +504,7 @@ main(argc, argv, envp)
|
||||
0)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create tpc socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(tcpsock, SOL_SOCKET,
|
||||
SO_REUSEADDR,
|
||||
@ -521,11 +516,11 @@ main(argc, argv, envp)
|
||||
syslog(LOG_ERR,
|
||||
"can't bind tcp addr %s: %m",
|
||||
bindhost[i]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (listen(tcpsock, 5) < 0) {
|
||||
syslog(LOG_ERR, "listen failed");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_tcp);
|
||||
FD_SET(tcpsock, &sockbits);
|
||||
@ -545,7 +540,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo tcp: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_tcp = getnetconfigent("tcp");
|
||||
if (nconf_tcp == NULL)
|
||||
@ -577,7 +572,7 @@ main(argc, argv, envp)
|
||||
ai_tcp6->ai_protocol)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"can't create tcp6 socket");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(tcp6sock, SOL_SOCKET,
|
||||
SO_REUSEADDR,
|
||||
@ -589,18 +584,18 @@ main(argc, argv, envp)
|
||||
syslog(LOG_ERR,
|
||||
"can't set v6-only binding for tcp6 "
|
||||
"socket: %m");
|
||||
exit(1);
|
||||
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]);
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (listen(tcp6sock, 5) < 0) {
|
||||
syslog(LOG_ERR, "listen failed");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
freeaddrinfo(ai_tcp6);
|
||||
FD_SET(tcp6sock, &sockbits);
|
||||
@ -620,7 +615,7 @@ main(argc, argv, envp)
|
||||
if (ecode != 0) {
|
||||
syslog(LOG_ERR, "getaddrinfo tcp6: %s",
|
||||
gai_strerror(ecode));
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
nconf_tcp6 = getnetconfigent("tcp6");
|
||||
if (nconf_tcp6 == NULL)
|
||||
@ -636,15 +631,24 @@ main(argc, argv, envp)
|
||||
|
||||
if (rpcbregcnt == 0) {
|
||||
syslog(LOG_ERR, "rpcb_set() failed, nothing to do: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
|
||||
if ((tcpflag) && (connect_type_cnt == 0)) {
|
||||
if (tcpflag && connect_type_cnt == 0) {
|
||||
syslog(LOG_ERR, "tcp connects == 0, nothing to do: %m");
|
||||
exit(1);
|
||||
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
|
||||
@ -656,7 +660,7 @@ main(argc, argv, envp)
|
||||
if (select(maxsock + 1,
|
||||
&ready, NULL, NULL, NULL) < 1) {
|
||||
syslog(LOG_ERR, "select failed: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
}
|
||||
for (tcpsock = 0; tcpsock <= maxsock; tcpsock++) {
|
||||
@ -666,7 +670,7 @@ main(argc, argv, envp)
|
||||
if ((msgsock = accept(tcpsock,
|
||||
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
||||
syslog(LOG_ERR, "accept failed: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
memset(inetpeer.sin_zero, 0,
|
||||
sizeof(inetpeer.sin_zero));
|
||||
@ -676,7 +680,7 @@ main(argc, argv, envp)
|
||||
"setsockopt SO_KEEPALIVE: %m");
|
||||
nfsdargs.sock = msgsock;
|
||||
nfsdargs.name = (caddr_t)&inetpeer;
|
||||
nfsdargs.namelen = sizeof(inetpeer);
|
||||
nfsdargs.namelen = len;
|
||||
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
||||
(void)close(msgsock);
|
||||
} else if (FD_ISSET(tcpsock, &v6bits)) {
|
||||
@ -686,7 +690,7 @@ main(argc, argv, envp)
|
||||
&len)) < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"accept failed: %m");
|
||||
exit(1);
|
||||
nfsd_exit(1);
|
||||
}
|
||||
if (setsockopt(msgsock, SOL_SOCKET,
|
||||
SO_KEEPALIVE, (char *)&on,
|
||||
@ -695,7 +699,7 @@ main(argc, argv, envp)
|
||||
"SO_KEEPALIVE: %m");
|
||||
nfsdargs.sock = msgsock;
|
||||
nfsdargs.name = (caddr_t)&inet6peer;
|
||||
nfsdargs.namelen = sizeof(inet6peer);
|
||||
nfsdargs.namelen = len;
|
||||
nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
|
||||
(void)close(msgsock);
|
||||
}
|
||||
@ -767,8 +771,14 @@ void
|
||||
reapchild(signo)
|
||||
int signo;
|
||||
{
|
||||
pid_t pid;
|
||||
int i;
|
||||
|
||||
while (wait3(NULL, WNOHANG, NULL) > 0);
|
||||
while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
|
||||
for (i = 0; i < nfsdcnt; i++)
|
||||
if (pid == children[i])
|
||||
children[i] = -1;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
@ -783,32 +793,52 @@ void
|
||||
killchildren()
|
||||
{
|
||||
int i;
|
||||
sigset_t sigs;
|
||||
|
||||
sigemptyset(&sigs);
|
||||
/*
|
||||
* Block SIGCHLD to avoid killing a reaped process (although it is
|
||||
* unlikely, the pid might have been reused).
|
||||
*/
|
||||
sigaddset(&sigs, SIGCHLD);
|
||||
if (sigprocmask(SIG_BLOCK, &sigs, NULL) == -1) {
|
||||
syslog(LOG_ERR, "sigprocmask: %s",
|
||||
strerror(errno));
|
||||
return;
|
||||
}
|
||||
for (i = 0; i < nfsdcnt; i++) {
|
||||
if (children[i] > 0)
|
||||
kill(children[i], SIGKILL);
|
||||
}
|
||||
if (sigprocmask(SIG_UNBLOCK, &sigs, NULL) == -1) {
|
||||
syslog(LOG_ERR, "sigprocmask: %s", strerror(errno));
|
||||
}
|
||||
unregistration();
|
||||
}
|
||||
|
||||
/*
|
||||
* Cleanup master after SIGUSR1.
|
||||
*/
|
||||
void
|
||||
cleanup(signo)
|
||||
{
|
||||
killchildren();
|
||||
exit (0);
|
||||
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);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user