Skip to content

GitLab

Commit 450437f1 authored by Kurt Zeilenga's avatar Kurt Zeilenga
Browse files

Keep -DNO_THREADS from spinning in a tight loop.

parent f1d2d6bf
Hide whitespace changes
Inline Side-by-side
servers/slapd/daemon.c
View file @ 450437f1
/* Revision history
*
* 5-Jun-96 hodges
* Added locking of new_conn_mutex when traversing the c[] array.
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
......@@ -23,6 +30,13 @@
#include <unistd.h>
#endif /* USE_SYSCONF */
#ifdef TCP_WRAPPERS
#include <tcpd.h>
int allow_severity = LOG_INFO;
int deny_severity = LOG_NOTICE;
#endif /* TCP_WRAPPERS */
extern Operation *op_add();
#ifndef SYSERRLIST_IN_STDIO
......@@ -48,7 +62,7 @@ static void set_shutdown();
static void do_nothing();
void
daemon(
slapd_daemon(
int port
)
{
......@@ -64,10 +78,18 @@ daemon(
int on = 1;
#ifdef USE_SYSCONF
dtblsize = sysconf( _SC_OPEN_MAX );
dtblsize = sysconf( _SC_OPEN_MAX );
#else /* USE_SYSCONF */
dtblsize = getdtablesize();
dtblsize = getdtablesize();
#endif /* USE_SYSCONF */
/*
* Add greg@greg.rim.or.jp
*/
#ifdef FD_SETSIZE
if(dtblsize > FD_SETSIZE) {
dtblsize = FD_SETSIZE;
}
#endif /* !FD_SETSIZE */
c = (Connection *) ch_calloc( 1, dtblsize * sizeof(Connection) );
......@@ -127,9 +149,19 @@ daemon(
}
(void) SIGNAL( SIGPIPE, SIG_IGN );
#ifdef linux
/*
* LinuxThreads are implemented using SIGUSR1/USR2,
* so we'll use SIGSTKFLT and SIGUNUSED
*/
(void) SIGNAL( SIGSTKFLT, (void *) do_nothing );
(void) SIGNAL( SIGUNUSED, (void *) set_shutdown );
#else /* !linux */
(void) SIGNAL( SIGUSR1, (void *) do_nothing );
(void) SIGNAL( SIGUSR2, (void *) set_shutdown );
#endif /* !linux */
(void) SIGNAL( SIGTERM, (void *) set_shutdown );
(void) SIGNAL( SIGINT, (void *) set_shutdown );
(void) SIGNAL( SIGHUP, (void *) set_shutdown );
Debug( LDAP_DEBUG_ANY, "slapd starting\n", 0, 0, 0 );
......@@ -156,6 +188,9 @@ daemon(
struct timeval *tvp;
int len, pid;
char *client_name;
char *client_addr;
FD_ZERO( &writefds );
FD_ZERO( &readfds );
FD_SET( tcps, &readfds );
......@@ -164,6 +199,8 @@ daemon(
Debug( LDAP_DEBUG_CONNS,
"listening for connections on %d, activity on:",
tcps, 0, 0 );
pthread_mutex_lock( &new_conn_mutex );
for ( i = 0; i < dtblsize; i++ ) {
if ( c[i].c_sb.sb_sd != -1 ) {
FD_SET( c[i].c_sb.sb_sd, &readfds );
......@@ -176,19 +213,20 @@ daemon(
}
}
Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
pthread_mutex_unlock( &new_conn_mutex );
zero.tv_sec = 0;
zero.tv_usec = 0;
Debug( LDAP_DEBUG_CONNS, "before select active_threads %d\n",
active_threads, 0, 0 );
#ifdef PTHREAD_PREEMPTIVE
#if defined(PTHREAD_PREEMPTIVE) || defined(NO_THREADS)
tvp = NULL;
#else
tvp = active_threads ? &zero : NULL;
#endif
pthread_mutex_unlock( &active_threads_mutex );
switch ( select( dtblsize, &readfds, &writefds, 0, tvp ) ) {
switch ( i = select( dtblsize, &readfds, &writefds, 0, tvp ) ) {
case -1: /* failure - try again */
Debug( LDAP_DEBUG_CONNS,
"select failed errno %d (%s)\n",
......@@ -203,7 +241,7 @@ daemon(
continue;
default: /* something happened - deal with it */
Debug( LDAP_DEBUG_CONNS, "select activity\n", 0, 0, 0 );
Debug( LDAP_DEBUG_CONNS, "select activity on %d descriptors\n", i, 0, 0 );
; /* FALL */
}
pthread_mutex_lock( &currenttime_mutex );
......@@ -225,8 +263,9 @@ daemon(
}
if ( ioctl( ns, FIONBIO, (caddr_t) &on ) == -1 ) {
Debug( LDAP_DEBUG_ANY,
"FIONBIO ioctl on %d faled\n", ns, 0, 0 );
"FIONBIO ioctl on %d failed\n", ns, 0, 0 );
}
c[ns].c_sb.sb_sd = ns;
Debug( LDAP_DEBUG_CONNS, "new connection on %d\n", ns,
0, 0 );
......@@ -234,43 +273,76 @@ daemon(
pthread_mutex_lock( &ops_mutex );
c[ns].c_connid = num_conns++;
pthread_mutex_unlock( &ops_mutex );
len = sizeof(from);
if ( getpeername( ns, (struct sockaddr *) &from, &len )
== 0 ) {
char *s;
#ifdef REVERSE_LOOKUP
char *s;
client_addr = inet_ntoa( from.sin_addr );
#if defined(REVERSE_LOOKUP) || defined(TCP_WRAPPERS)
hp = gethostbyaddr( (char *)
&(from.sin_addr.s_addr),
sizeof(from.sin_addr.s_addr), AF_INET );
#else
hp = NULL;
#endif
Statslog( LDAP_DEBUG_STATS,
"conn=%d fd=%d connection from %s (%s)\n",
c[ns].c_connid, ns, hp == NULL ? "unknown"
: hp->h_name, inet_ntoa( from.sin_addr ),
0 );
if(hp) {
client_name = hp->h_name;
if ( c[ns].c_addr != NULL ) {
free( c[ns].c_addr );
}
c[ns].c_addr = strdup( inet_ntoa(
from.sin_addr ) );
if ( c[ns].c_domain != NULL ) {
free( c[ns].c_domain );
}
c[ns].c_domain = strdup( hp == NULL ? "" :
hp->h_name );
/* normalize the domain */
for ( s = c[ns].c_domain; *s; s++ ) {
*s = TOLOWER( *s );
/* normalize the domain */
for ( s = client_name; *s; s++ ) {
*s = TOLOWER( *s );
}
} else {
client_name = NULL;
}
#else
client_name = NULL;
#endif
} else {
client_name = NULL;;
client_addr = NULL;
}
#ifdef TCP_WRAPPERS
if(!hosts_ctl("slapd", client_name, client_addr,
STRING_UNKNOWN))
{
/* DENY ACCESS */
Statslog( LDAP_DEBUG_STATS,
"conn=%d fd=%d connection from unknown\n",
c[ns].c_connid, ns, 0, 0, 0 );
"conn=%d fd=%d connection from %s (%s) denied.\n",
c[ns].c_connid, ns,
client_name == NULL ? "unknown" : client_name,
client_addr == NULL ? "unknown" : client_addr,
0 );
close(ns);
pthread_mutex_unlock( &new_conn_mutex );
continue;
}
#endif /* TCP_WRAPPERS */
Statslog( LDAP_DEBUG_STATS,
"conn=%d fd=%d connection from %s (%s) accepted.\n",
c[ns].c_connid, ns,
client_name == NULL ? "unknown" : client_name,
client_addr == NULL ? "unknown" : client_addr,
0 );
if ( c[ns].c_addr != NULL ) {
free( c[ns].c_addr );
}
c[ns].c_addr = strdup( client_addr );
if ( c[ns].c_domain != NULL ) {
free( c[ns].c_domain );
}
c[ns].c_domain = strdup( client_name == NULL
? "" : client_name );
pthread_mutex_lock( &c[ns].c_dnmutex );
if ( c[ns].c_dn != NULL ) {
free( c[ns].c_dn );
......@@ -349,15 +421,33 @@ set_shutdown()
{
Debug( LDAP_DEBUG_ANY, "slapd got shutdown signal\n", 0, 0, 0 );
slapd_shutdown = 1;
#ifdef linux
/*
* LinuxThreads are implemented using SIGUSR1/USR2,
* so we'll use SIGSTKFLT and SIGUNUSED
*/
pthread_kill( listener_tid, SIGSTKFLT );
(void) SIGNAL( SIGUNUSED, (void *) set_shutdown );
#else /* !linux */
pthread_kill( listener_tid, SIGUSR1 );
(void) SIGNAL( SIGUSR2, (void *) set_shutdown );
#endif /* !linux */
(void) SIGNAL( SIGTERM, (void *) set_shutdown );
(void) SIGNAL( SIGINT, (void *) set_shutdown );
(void) SIGNAL( SIGHUP, (void *) set_shutdown );
}
static void
do_nothing()
{
Debug( LDAP_DEBUG_TRACE, "slapd got SIGUSR1\n", 0, 0, 0 );
Debug( LDAP_DEBUG_TRACE, "slapd got do_nothing signal\n", 0, 0, 0 );
#ifdef linux
/*
* LinuxThreads are implemented using SIGUSR1/USR2,
* so we'll use SIGSTKFLT and SIGUNUSED
*/
(void) SIGNAL( SIGSTKFLT, (void *) do_nothing );
#else /* !linux */
(void) SIGNAL( SIGUSR1, (void *) do_nothing );
#endif /* !linux */
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment