rbb 00/07/07 10:35:44
Modified: src/main mpm_common.c
src/modules/mpm config.m4
Added: src/modules/mpm/mpmt Makefile.in config.m4 mpm.h
mpm_default.h mpmt.c scoreboard.c scoreboard.h
Log:
Initial version of the mpmt MPM. This MPM can emulate dexter, mpmt_pthread,
and prefork. This basically just combines a lot of common code. This
builds and serves pages in all three modes, but I don't think killing
the server works in any of them. The configuration system hasn't changed
at all, so using --with-mpm=(prefork|dexter|mpmt_pthread) all work.
My goal is to remove the three separate MPMs in a few days, and then work
on merging one of the BeOS and the OS/2 MPMs into this as well. :-)
Revision Changes Path
1.18 +2 -2 apache-2.0/src/main/mpm_common.c
Index: mpm_common.c
===================================================================
RCS file: /home/cvs/apache-2.0/src/main/mpm_common.c,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -r1.17 -r1.18
--- mpm_common.c 2000/06/22 18:28:06 1.17
+++ mpm_common.c 2000/07/07 17:35:38 1.18
@@ -78,10 +78,10 @@
#include <sys/time.h> /* for timeval definitions */
#endif
-#if defined(DEXTER_MPM) || defined(MPMT_BEOS_MPM) || defined(BEOS_MPM)
+#if defined(DEXTER) || defined(MPMT_BEOS_MPM) || defined(BEOS_MPM)
#define CHILD_TABLE 1
#define CHILD_INFO_TABLE ap_child_table
-#elif defined(MPMT_PTHREAD_MPM) || defined (PREFORK_MPM)
+#elif defined(MPMT_PTHREAD) || defined (NO_THREADS)
#define SCOREBOARD 1
#define CHILD_INFO_TABLE ap_scoreboard_image->parent
#endif
1.18 +23 -2 apache-2.0/src/modules/mpm/config.m4
Index: config.m4
===================================================================
RCS file: /home/cvs/apache-2.0/src/modules/mpm/config.m4,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -r1.17 -r1.18
--- config.m4 2000/06/12 17:04:39 1.17
+++ config.m4 2000/07/07 17:35:41 1.18
@@ -32,9 +32,30 @@
APACHE_CHECK_SIGWAIT_ONE_ARG
APACHE_FAST_OUTPUT(modules/mpm/Makefile)
+
MPM_NAME=$apache_cv_mpm
-MPM_DIR=modules/mpm/$MPM_NAME
-MPM_LIB=$MPM_DIR/lib${MPM_NAME}.la
+if test "$MPM_NAME" = "prefork" ; then
+ MPM_NAME="mpmt_pthread"
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -DNO_THREADS"
+
+ ac_cv_enable_threads="no"
+ AC_CACHE_SAVE
+fi
+
+if test "$MPM_NAME" = "mpmt_pthread" ; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -DMPMT_PTHREAD"
+elif test "$MPM_NAME" = "dexter" ; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -DDEXTER"
+fi
+
+if test "$MPM_NAME" = "dexter" -o "$MPM_NAME" = "mpmt_pthread"; then
+ MPM_DIR=modules/mpm/mpmt;
+ MPM_LIB=$MPM_DIR/libmpmt.la
+ MPM_NAME="mpmt"
+else
+ MPM_DIR=modules/mpm/$MPM_NAME
+ MPM_LIB=$MPM_DIR/lib${MPM_NAME}.la
+fi
APACHE_SUBST(MPM_NAME)
MODLIST="$MODLIST mpm_${MPM_NAME}"
1.1 apache-2.0/src/modules/mpm/mpmt/Makefile.in
Index: Makefile.in
===================================================================
LTLIBRARY_NAME = libmpmt.la
LTLIBRARY_SOURCES = mpmt.c scoreboard.c
include $(top_srcdir)/build/ltlib.mk
1.1 apache-2.0/src/modules/mpm/mpmt/config.m4
Index: config.m4
===================================================================
dnl ## XXX - Need a more thorough check of the proper flags to use
if test "$MPM_NAME" = "mpmt_pthread" -o "$MPM_NAME" = "dexter" ; then
ac_cv_enable_threads="yes"
AC_CACHE_SAVE
APACHE_FAST_OUTPUT(modules/mpm/mpmt/Makefile)
APACHE_MPM_PTHREAD
fi
dnl Obsolete scoreboard code uses this.
AC_CHECK_HEADERS(sys/times.h)
AC_CHECK_FUNCS(times)
1.1 apache-2.0/src/modules/mpm/mpmt/mpm.h
Index: mpm.h
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#include "scoreboard.h"
#include "unixd.h"
#ifndef APACHE_MPM_MPMT_H
#define APACHE_MPM_MPMT_H
#define MPMT_MPM
#ifdef DEXTER
/* Table of child status */
#define SERVER_DEAD 0
#define SERVER_DYING 1
#define SERVER_ALIVE 2
typedef struct ap_ctable{
pid_t pid;
unsigned char status;
} ap_ctable;
#endif
#ifdef DEXTER
/* variables only needed for dexter */
extern ap_ctable ap_child_table[HARD_SERVER_LIMIT];
#elif defined(MPMT_PTHREAD)
/* variables only needed for mpmt_pthread */
extern int ap_threads_per_child;
extern int ap_max_requests_per_child;
extern int ap_extended_status;
extern unsigned int ap_my_pid;
extern scoreboard *ap_scoreboard_image;
#endif
/* variables needed for ANY mpmt MPM */
extern server_rec *ap_server_conf;
extern int ap_max_daemons_limit;
#endif /* APACHE_MPM_MPMT_PTHREAD_H */
1.1 apache-2.0/src/modules/mpm/mpmt/mpm_default.h
Index: mpm_default.h
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#ifndef APACHE_MPM_DEFAULT_H
#define APACHE_MPM_DEFAULT_H
/* Number of servers to spawn off by default --- also, if fewer than
* this free when the caretaker checks, it will spawn more.
*/
#ifndef DEFAULT_START_DAEMON
#if defined(DEXTER)
#define DEFAULT_START_DAEMON 2
/* In Dexter, we also have to know how many threads each server should
* start by default.
*/
#ifndef DEFAULT_START_THREAD
#define DEFAULT_START_THREAD 5
#endif
#elif defined(MPMT_PTHREAD)
#define DEFAULT_START_DAEMON 5
#endif /* defined MPMT_PTHREAD */
#endif /* ndef DEFAULT_START_DAEMON */
/* Maximum number of *free* servers --- more than this, and
* they will die off.
*/
#ifndef DEFAULT_MAX_FREE_DAEMON
#define DEFAULT_MAX_FREE_DAEMON 10
#endif
/* Minimum --- fewer than this, and more will be created */
#ifndef DEFAULT_MIN_FREE_DAEMON
#define DEFAULT_MIN_FREE_DAEMON 5
#endif
/* Limit on the total --- clients will be locked out if more servers than
* this are needed. It is intended solely to keep the server from crashing
* when things get out of hand.
*
* We keep a hard maximum number of servers, for two reasons --- first off,
* in case something goes seriously wrong, we want to stop the fork bomb
* short of actually crashing the machine we're running on by filling some
* kernel table. Secondly, it keeps the size of the scoreboard file small
* enough that we can read the whole thing without worrying too much about
* the overhead.
*/
#ifdef NO_THREADS
#define HARD_SERVER_LIMIT 256
#endif
#ifndef HARD_SERVER_LIMIT
#define HARD_SERVER_LIMIT 8
#endif
/* Limit on the threads per process. Clients will be locked out if more than
* this * HARD_SERVER_LIMIT are needed.
*
* We keep this for one reason it keeps the size of the scoreboard file small
* enough that we can read the whole thing without worrying too much about
* the overhead.
*/
#ifdef NO_THREADS
#define HARD_THREAD_LIMIT 1
#endif
#ifndef HARD_THREAD_LIMIT
#define HARD_THREAD_LIMIT 64
#endif
#ifdef NO_THREADS
#define DEFAULT_THREADS_PER_CHILD 1
#endif
#ifndef DEFAULT_THREADS_PER_CHILD
#define DEFAULT_THREADS_PER_CHILD 50
#endif
/* File used for accept locking, when we use a file */
#ifndef DEFAULT_LOCKFILE
#define DEFAULT_LOCKFILE "logs/accept.lock"
#endif
/* Scoreboard file, if there is one */
#ifndef DEFAULT_SCOREBOARD
#define DEFAULT_SCOREBOARD "logs/apache_runtime_status"
#endif
/* Where the main/parent process's pid is logged */
#ifndef DEFAULT_PIDLOG
#define DEFAULT_PIDLOG "logs/httpd.pid"
#endif
/*
* Interval, in microseconds, between scoreboard maintenance.
*/
#ifndef SCOREBOARD_MAINTENANCE_INTERVAL
#define SCOREBOARD_MAINTENANCE_INTERVAL 1000000
#endif
/* Number of requests to try to handle in a single process. If <= 0,
* the children don't die off.
*/
#ifndef DEFAULT_MAX_REQUESTS_PER_CHILD
#define DEFAULT_MAX_REQUESTS_PER_CHILD 10000
#endif
#endif /* AP_MPM_DEFAULT_H */
1.1 apache-2.0/src/modules/mpm/mpmt/mpmt.c
Index: mpmt.c
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#define CORE_PRIVATE
#include "apr_portable.h"
#include "apr_file_io.h"
#include "apr_thread_proc.h"
#include "ap_config.h"
#include "httpd.h"
#include "http_main.h"
#include "http_log.h"
#include "http_config.h" /* for read_config */
#include "http_core.h" /* for get_remote_host */
#include "http_connection.h"
#include "ap_mpm.h"
#include "unixd.h"
#include "mpm_common.h"
#include "iol_socket.h"
#include "ap_listen.h"
#include "scoreboard.h"
#include "mpm_default.h"
#include "mpm.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <pthread.h>
#include <signal.h>
/*
* Actual definitions of config globals
*/
#ifdef DEXTER
static int max_threads = 0;
struct ap_ctable ap_child_table[HARD_SERVER_LIMIT];
#endif
#ifndef DEXTER
static time_t ap_restart_time = 0;
API_VAR_EXPORT int ap_extended_status = 0;
/* The structure used to pass unique initialization info to each thread */
typedef struct {
int pid;
int tid;
int sd;
ap_pool_t *tpool; /* "pthread" would be confusing */
} proc_info;
#endif
int ap_threads_per_child = 0; /* Worker threads per child started at startup */
int ap_max_requests_per_child = 0;
static const char *ap_pid_fname = NULL;
API_VAR_EXPORT const char *ap_scoreboard_fname = NULL;
static int ap_daemons_to_start = 0;
static int min_spare_threads = 0;
static int max_spare_threads = 0;
static int workers_may_exit = 0;
static int requests_this_child;
static int num_listensocks = 0;
static ap_socket_t **listensocks;
/*
* The max child slot ever assigned, preserved across restarts. Necessary
* to deal with MaxClients changes across SIGWINCH restarts. We use this
* value to optimize routines that have to scan the entire scoreboard.
*/
int ap_max_daemons_limit = -1;
static char ap_coredump_dir[MAX_STRING_LEN];
static ap_file_t *pipe_of_death_in = NULL;
static ap_file_t *pipe_of_death_out = NULL;
static pthread_mutex_t pipe_of_death_mutex;
/* *Non*-shared http_main globals... */
server_rec *ap_server_conf;
/* one_process --- debugging mode variable; can be set from the command line
* with the -X flag. If set, this gets you the child_main loop running
* in the process which originally started up (no detach, no make_child),
* which is a pretty nice debugging environment. (You'll get a SIGHUP
* early in standalone_main; just continue through. This is the server
* trying to kill off any child processes which it might have lying
* around --- Apache doesn't keep track of their pids, it just sends
* SIGHUP to the process group, ignoring it in the root process.
* Continue through and you'll be fine.).
*/
static int one_process = 0;
#ifdef DEBUG_SIGSTOP
int raise_sigstop_flags;
#endif
static ap_pool_t *pconf; /* Pool for config stuff */
static ap_pool_t *pchild; /* Pool for httpd child stuff */
#ifdef DEXTER
static ap_pool_t *thread_pool_parent; /* Parent of per-thread pools */
static pthread_mutex_t thread_pool_parent_mutex;
#endif
static int child_num; /* This can be gotten rid of in time. look for the
the conn_rec stuff to see how. rbb */
unsigned int ap_my_pid; /* Linux getpid() doesn't work except in main
thread. Use this instead */
/* Keep track of the number of worker threads currently active */
/* These could probably all go away too with a little work. */
static int worker_thread_count;
static pthread_mutex_t worker_thread_count_mutex;
static pthread_attr_t worker_thread_attr;
#ifdef DEXTER
static int worker_thread_free_ids[HARD_THREAD_LIMIT];
/* Keep track of the number of idle worker threads */
static int idle_thread_count;
static pthread_mutex_t idle_thread_count_mutex;
#endif
/* Locks for accept serialization */
#ifdef NO_SERIALIZED_ACCEPT
#define SAFE_ACCEPT(stmt) APR_SUCCESS
#else
#define SAFE_ACCEPT(stmt) (stmt)
#endif
static pthread_mutex_t thread_accept_mutex = PTHREAD_MUTEX_INITIALIZER;
static ap_lock_t *process_accept_mutex;
static const char *lock_fname;
API_EXPORT(int) ap_get_max_daemons(void)
{
return ap_max_daemons_limit;
}
/* a clean exit from a child with proper cleanup */
static void clean_child_exit(int code) __attribute__ ((noreturn));
static void clean_child_exit(int code)
{
if (pchild) {
ap_destroy_pool(pchild);
}
exit(code);
}
/* handle all varieties of core dumping signals */
static void sig_coredump(int sig)
{
chdir(ap_coredump_dir);
ap_signal(sig, SIG_DFL);
kill(ap_my_pid, sig);
/* At this point we've got sig blocked, because we're still inside
* the signal handler. When we leave the signal handler it will
* be unblocked, and we'll take the signal... and coredump or whatever
* is appropriate for this particular Unix. In addition the parent
* will see the real signal we received -- whereas if we called
* abort() here, the parent would only see SIGABRT.
*/
}
static void just_die(int sig)
{
clean_child_exit(0);
}
/*****************************************************************
* Connection structures and accounting...
*/
/* volatile just in case */
static int volatile shutdown_pending;
static int volatile restart_pending;
static int volatile is_graceful;
#ifndef DEXTER
ap_generation_t volatile ap_my_generation;
#endif
/*
* ap_start_shutdown() and ap_start_restart(), below, are a first stab at
* functions to initiate shutdown or restart without relying on signals.
* Previously this was initiated in sig_term() and restart() signal handlers,
* but we want to be able to start a shutdown/restart from other sources --
* e.g. on Win32, from the service manager. Now the service manager can
* call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
* these functions can also be called by the child processes, since global
* variables are no longer used to pass on the required action to the parent.
*
* These should only be called from the parent process itself, since the
* parent process will use the shutdown_pending and restart_pending variables
* to determine whether to shutdown or restart. The child process should
* call signal_parent() directly to tell the parent to die -- this will
* cause neither of those variable to be set, which the parent will
* assume means something serious is wrong (which it will be, for the
* child to force an exit) and so do an exit anyway.
*/
void ap_start_shutdown(void)
{
if (shutdown_pending == 1) {
/* Um, is this _probably_ not an error, if the user has
* tried to do a shutdown twice quickly, so we won't
* worry about reporting it.
*/
return;
}
shutdown_pending = 1;
}
/* do a graceful restart if graceful == 1 */
void ap_start_restart(int graceful)
{
if (restart_pending == 1) {
/* Probably not an error - don't bother reporting it */
return;
}
restart_pending = 1;
is_graceful = graceful;
}
static void sig_term(int sig)
{
ap_start_shutdown();
}
static void restart(int sig)
{
#ifndef WIN32
ap_start_restart(sig == SIGWINCH);
#else
ap_start_restart(1);
#endif
}
static void set_signals(void)
{
#ifndef NO_USE_SIGACTION
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (!one_process) {
sa.sa_handler = sig_coredump;
#if defined(SA_ONESHOT)
sa.sa_flags = SA_ONESHOT;
#elif defined(SA_RESETHAND)
sa.sa_flags = SA_RESETHAND;
#endif
if (sigaction(SIGSEGV, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)");
#ifdef SIGBUS
if (sigaction(SIGBUS, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)");
#endif
#ifdef SIGABORT
if (sigaction(SIGABORT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABORT)");
#endif
#ifdef SIGABRT
if (sigaction(SIGABRT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)");
#endif
#ifdef SIGILL
if (sigaction(SIGILL, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)");
#endif
sa.sa_flags = 0;
}
sa.sa_handler = sig_term;
if (sigaction(SIGTERM, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
#ifdef SIGINT
if (sigaction(SIGINT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
#endif
#ifdef SIGXCPU
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXCPU, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)");
#endif
#ifdef SIGXFSZ
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXFSZ, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)");
#endif
#ifdef SIGPIPE
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
#endif
/* we want to ignore HUPs and WINCH while we're busy processing one */
sigaddset(&sa.sa_mask, SIGHUP);
sigaddset(&sa.sa_mask, SIGWINCH);
sa.sa_handler = restart;
if (sigaction(SIGHUP, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
if (sigaction(SIGWINCH, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGWINCH)");
#else
if (!one_process) {
ap_signal(SIGSEGV, sig_coredump);
#ifdef SIGBUS
ap_signal(SIGBUS, sig_coredump);
#endif /* SIGBUS */
#ifdef SIGABORT
ap_signal(SIGABORT, sig_coredump);
#endif /* SIGABORT */
#ifdef SIGABRT
ap_signal(SIGABRT, sig_coredump);
#endif /* SIGABRT */
#ifdef SIGILL
ap_signal(SIGILL, sig_coredump);
#endif /* SIGILL */
#ifdef SIGXCPU
ap_signal(SIGXCPU, SIG_DFL);
#endif /* SIGXCPU */
#ifdef SIGXFSZ
ap_signal(SIGXFSZ, SIG_DFL);
#endif /* SIGXFSZ */
}
ap_signal(SIGTERM, sig_term);
#ifdef SIGHUP
ap_signal(SIGHUP, restart);
#endif /* SIGHUP */
#ifdef SIGWINCH
ap_signal(SIGWINCH, restart);
#endif /* SIGWINCH */
#ifdef SIGPIPE
ap_signal(SIGPIPE, SIG_IGN);
#endif /* SIGPIPE */
#endif
}
static void process_child_status(ap_proc_t *pid, ap_wait_t status)
{
/* Child died... if it died due to a fatal error,
* we should simply bail out.
*/
if ((WIFEXITED(status)) &&
WEXITSTATUS(status) == APEXIT_CHILDFATAL) {
ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, 0, ap_server_conf,
"Child %ld returned a Fatal error... \n"
"Apache is exiting!",
(long)pid->pid);
exit(APEXIT_CHILDFATAL);
}
if (WIFSIGNALED(status)) {
switch (WTERMSIG(status)) {
case SIGTERM:
case SIGHUP:
case SIGUSR1:
case SIGKILL:
break;
default:
#ifdef SYS_SIGLIST
#ifdef WCOREDUMP
if (WCOREDUMP(status)) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
0, ap_server_conf,
"child pid %ld exit signal %s (%d), "
"possible coredump in %s",
(long)pid->pid, (WTERMSIG(status) >= NumSIG) ? "" :
SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status),
ap_coredump_dir);
}
else {
#endif
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
0, ap_server_conf,
"child pid %ld exit signal %s (%d)",
(long)pid->pid,
SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status));
#ifdef WCOREDUMP
}
#endif
#else
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
0, ap_server_conf,
"child pid %ld exit signal %d",
(long)pid->pid, WTERMSIG(status));
#endif
}
}
}
static int setup_listeners(server_rec *s)
{
ap_listen_rec *lr;
int num_listeners = 0;
if (ap_listen_open(s->process, s->port)) {
return 0;
}
for (lr = ap_listeners; lr; lr = lr->next) {
num_listeners++;
}
return num_listeners;
}
/*****************************************************************
* Here follows a long bunch of generic server bookkeeping stuff...
*/
#if defined(TCP_NODELAY) && !defined(MPE) && !defined(TPF)
static void sock_disable_nagle(int s)
{
/* The Nagle algorithm says that we should delay sending partial
* packets in hopes of getting more data. We don't want to do
* this; we are not telnet. There are bad interactions between
* persistent connections and Nagle's algorithm that have very severe
* performance penalties. (Failing to disable Nagle is not much of a
* problem with simple HTTP.)
*
* In spite of these problems, failure here is not a shooting offense.
*/
int just_say_no = 1;
if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char *) &just_say_no,
sizeof(int)) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf,
"setsockopt: (TCP_NODELAY)");
}
}
#else
#define sock_disable_nagle(s) /* NOOP */
#endif
int ap_graceful_stop_signalled(void)
{
/* XXX - Does this really work? - Manoj */
return is_graceful;
}
/*****************************************************************
* Child process main loop.
*/
static void process_socket(ap_pool_t *p, ap_socket_t *sock, long conn_id)
{
BUFF *conn_io;
conn_rec *current_conn;
ap_iol *iol;
int csd;
ap_status_t rv;
int my_child_num = conn_id / HARD_THREAD_LIMIT;
int my_thread_num = conn_id % HARD_THREAD_LIMIT;
if ((rv = ap_get_os_sock(&csd, sock)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, "ap_get_os_sock");
}
if (csd >= FD_SETSIZE) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, NULL,
"new file descriptor %d is too large; you probably need "
"to rebuild Apache with a larger FD_SETSIZE "
"(currently %d)",
csd, FD_SETSIZE);
ap_close_socket(sock);
return;
}
sock_disable_nagle(csd);
iol = ap_iol_attach_socket(p, sock);
#ifndef DEXTER
/* TODO -- scoreboard stuff that needs to be finished rbb */
(void) ap_update_child_status(my_child_num, my_thread_num,
SERVER_BUSY_READ, (request_rec *) NULL);
#endif
conn_io = ap_bcreate(p, B_RDWR);
ap_bpush_iol(conn_io, iol);
current_conn = ap_new_apr_connection(p, ap_server_conf, conn_io, sock,
conn_id);
ap_process_connection(current_conn);
ap_lingering_close(current_conn);
}
static void *worker_thread(void *);
#ifdef DEXTER
/* Starts a thread as long as we're below max_threads */
static int start_thread(void)
{
pthread_t thread;
pthread_mutex_lock(&worker_thread_count_mutex);
if (worker_thread_count < max_threads) {
if (pthread_create(&thread, &worker_thread_attr, worker_thread,
&worker_thread_free_ids[worker_thread_count])) {
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
"pthread_create: unable to create worker thread");
/* In case system resources are maxxed out, we don't want
Apache running away with the CPU trying to fork over and
over and over again if we exit. */
sleep(10);
workers_may_exit = 1;
pthread_mutex_unlock(&worker_thread_count_mutex);
return 0;
}
else {
worker_thread_count++;
}
}
else {
static int reported = 0;
if (!reported) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, ap_server_conf,
"server reached MaxThreadsPerChild setting, consider raising the"
" MaxThreadsPerChild or NumServers settings");
reported = 1;
}
pthread_mutex_unlock(&worker_thread_count_mutex);
return 0;
}
pthread_mutex_unlock(&worker_thread_count_mutex);
return 1;
}
#else
/* Starts a thread as long as we're below max_threads */
static int start_thread(void)
{
proc_info *my_info = NULL;
pthread_t thread;
my_info = (proc_info *)malloc(sizeof(proc_info));
if (my_info == NULL) {
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
"malloc: out of memory");
clean_child_exit(APEXIT_CHILDFATAL);
}
my_info->pid = child_num;
my_info->tid = worker_thread_count;
my_info->sd = 0;
ap_create_pool(&my_info->tpool, pchild);
/* We are creating threads right now */
(void) ap_update_child_status(child_num, worker_thread_count,
SERVER_STARTING, (request_rec *) NULL);
#ifndef NO_THREADS
if (pthread_create(&thread, &worker_thread_attr, worker_thread, my_info)) {
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
"pthread_create: unable to create worker thread");
/* In case system resources are maxxed out, we don't want
Apache running away with the CPU trying to fork over and
over and over again if we exit. */
sleep(10);
clean_child_exit(APEXIT_CHILDFATAL);
}
#else
worker_thread(my_info);
/* The SIGTERM shouldn't let us reach this point, but just in case... */
clean_child_exit(APEXIT_OK);
#endif
/* We let each thread update it's own scoreboard entry. This is done
* because it let's us deal with tid better.
*/
}
#endif
/* Sets workers_may_exit if we received a character on the pipe_of_death */
static void check_pipe_of_death(void)
{
pthread_mutex_lock(&pipe_of_death_mutex);
if (!workers_may_exit) {
ap_status_t ret;
char pipe_read_char;
ap_ssize_t n = 1;
ret = ap_recv(listensocks[0], &pipe_read_char, &n);
if (ap_canonical_error(ret) == APR_EAGAIN) {
/* It lost the lottery. It must continue to suffer
* through a life of servitude. */
}
else {
/* It won the lottery (or something else is very
* wrong). Embrace death with open arms. */
workers_may_exit = 1;
}
}
pthread_mutex_unlock(&pipe_of_death_mutex);
}
#ifdef DEXTER
/* idle_thread_count should be incremented before starting a worker_thread */
static void *worker_thread(void *arg)
{
ap_socket_t *csd = NULL;
ap_pool_t *tpool; /* Pool for this thread */
ap_pool_t *ptrans; /* Pool for per-transaction stuff */
ap_socket_t *sd = NULL;
int srv;
int curr_pollfd, last_pollfd = 0;
int thread_just_started = 1;
int thread_num = *((int *) arg);
long conn_id = child_num * HARD_THREAD_LIMIT + thread_num;
ap_pollfd_t *pollset;
int n;
ap_status_t rv;
pthread_mutex_lock(&thread_pool_parent_mutex);
ap_create_pool(&tpool, thread_pool_parent);
pthread_mutex_unlock(&thread_pool_parent_mutex);
ap_create_pool(&ptrans, tpool);
ap_setup_poll(&pollset, num_listensocks+1, tpool);
for(n=0 ; n <= num_listensocks ; ++n)
ap_add_poll_socket(pollset, listensocks[n], APR_POLLIN);
while (!workers_may_exit) {
workers_may_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0);
if (workers_may_exit) break;
if (!thread_just_started) {
pthread_mutex_lock(&idle_thread_count_mutex);
if (idle_thread_count < max_spare_threads) {
idle_thread_count++;
pthread_mutex_unlock(&idle_thread_count_mutex);
}
else {
pthread_mutex_unlock(&idle_thread_count_mutex);
break;
}
}
else {
thread_just_started = 0;
}
pthread_mutex_lock(&thread_accept_mutex);
if (workers_may_exit) {
pthread_mutex_unlock(&thread_accept_mutex);
break;
} if ((rv = SAFE_ACCEPT(ap_lock(process_accept_mutex)))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"ap_lock failed. Attempting to shutdown "
"process gracefully.");
workers_may_exit = 1;
}
while (!workers_may_exit) {
ap_int16_t event;
srv = ap_poll(pollset, &n, -1);
if (srv != APR_SUCCESS) {
if (ap_canonical_error(srv) == APR_EINTR) {
continue;
}
/* ap_poll() will only return errors in catastrophic
* circumstances. Let's try exiting gracefully, for now. */
ap_log_error(APLOG_MARK, APLOG_ERR, srv, (const server_rec *)
ap_server_conf, "ap_poll: (listen)"); workers_may_exit = 1;
}
if (workers_may_exit) break;
ap_get_revents(&event, listensocks[0], pollset);
if (event & APR_POLLIN) {
/* A process got a signal on the shutdown pipe. Check if we're
* the lucky process to die. */
check_pipe_of_death();
continue;
}
if (num_listensocks == 1) {
sd = ap_listeners->sd;
goto got_fd;
}
else {
/* find a listener */
curr_pollfd = last_pollfd;
do {
curr_pollfd++; if (curr_pollfd > num_listensocks) {
curr_pollfd = 1;
}
/* XXX: Should we check for POLLERR? */
ap_get_revents(&event, listensocks[curr_pollfd], pollset);
if (event & APR_POLLIN) {
last_pollfd = curr_pollfd;
sd = listensocks[curr_pollfd];
goto got_fd;
}
} while (curr_pollfd != last_pollfd);
}
}
got_fd:
if (!workers_may_exit) {
if ((rv = ap_accept(&csd, sd, ptrans)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, "ap_accept");
}
if ((rv = SAFE_ACCEPT(ap_unlock(process_accept_mutex)))
!= APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"ap_unlock failed. Attempting to shutdown "
"process gracefully.");
workers_may_exit = 1;
}
pthread_mutex_unlock(&thread_accept_mutex);
pthread_mutex_lock(&idle_thread_count_mutex);
if (idle_thread_count > min_spare_threads) {
idle_thread_count--;
}
else {
if (!start_thread()) {
idle_thread_count--;
}
}
pthread_mutex_unlock(&idle_thread_count_mutex);
process_socket(ptrans, csd, conn_id); requests_this_child--;
} else {
if ((rv = SAFE_ACCEPT(ap_unlock(process_accept_mutex)))
!= APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"ap_unlock failed. Attempting to shutdown "
"process gracefully.");
workers_may_exit = 1;
}
pthread_mutex_unlock(&thread_accept_mutex);
pthread_mutex_lock(&idle_thread_count_mutex);
idle_thread_count--;
pthread_mutex_unlock(&idle_thread_count_mutex);
break;
}
ap_clear_pool(ptrans);
}
pthread_mutex_lock(&thread_pool_parent_mutex);
ap_destroy_pool(tpool);
pthread_mutex_unlock(&thread_pool_parent_mutex);
pthread_mutex_lock(&worker_thread_count_mutex);
worker_thread_count--;
worker_thread_free_ids[worker_thread_count] = thread_num;
if (worker_thread_count == 0) { /* All the threads have exited, now finish the shutdown process
* by signalling the sigwait thread */
kill(ap_my_pid, SIGTERM);
}
pthread_mutex_unlock(&worker_thread_count_mutex);
return NULL;
}
#else
static void * worker_thread(void * dummy)
{
proc_info * ti = dummy;
int process_slot = ti->pid;
int thread_slot = ti->tid;
ap_pool_t *tpool = ti->tpool;
ap_socket_t *csd = NULL;
ap_pool_t *ptrans; /* Pool for per-transaction stuff */
ap_socket_t *sd = NULL;
int n;
int curr_pollfd, last_pollfd = 0;
ap_pollfd_t *pollset;
ap_status_t rv;
free(ti);
ap_create_pool(&ptrans, tpool);
pthread_mutex_lock(&worker_thread_count_mutex);
worker_thread_count++;
pthread_mutex_unlock(&worker_thread_count_mutex);
ap_setup_poll(&pollset, num_listensocks+1, tpool);
for(n=0 ; n <= num_listensocks ; ++n)
ap_add_poll_socket(pollset, listensocks[n], APR_POLLIN);
/* TODO: Switch to a system where threads reuse the results from earlier
poll calls - manoj */
while (!workers_may_exit) {
workers_may_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0);
if (workers_may_exit) break;
(void) ap_update_child_status(process_slot, thread_slot, SERVER_READY,
(request_rec *) NULL);
pthread_mutex_lock(&thread_accept_mutex);
if (workers_may_exit) {
pthread_mutex_unlock(&thread_accept_mutex);
break;
}
if ((rv = SAFE_ACCEPT(ap_lock(process_accept_mutex)))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"ap_lock failed. Attempting to shutdown "
"process gracefully.");
workers_may_exit = 1;
}
while (!workers_may_exit) {
ap_status_t ret;
ap_int16_t event;
ret = ap_poll(pollset, &n, -1);
if (ret != APR_SUCCESS) {
if (ap_canonical_error(ret) == APR_EINTR) {
continue;
}
/* ap_poll() will only return errors in catastrophic
* circumstances. Let's try exiting gracefully, for now. */
ap_log_error(APLOG_MARK, APLOG_ERR, ret, (const server_rec *)
ap_server_conf, "ap_poll: (listen)");
workers_may_exit = 1;
}
if (workers_may_exit) break;
ap_get_revents(&event, listensocks[0], pollset);
if (event & APR_POLLIN) {
/* A process got a signal on the shutdown pipe. Check if we're
* the lucky process to die. */
check_pipe_of_death();
continue;
}
if (num_listensocks == 1) {
sd = ap_listeners->sd;
goto got_fd;
}
else {
/* find a listener */
curr_pollfd = last_pollfd;
do {
curr_pollfd++;
if (curr_pollfd > num_listensocks) {
curr_pollfd = 1;
}
/* XXX: Should we check for POLLERR? */
ap_get_revents(&event, listensocks[curr_pollfd], pollset);
if (event & APR_POLLIN) {
last_pollfd = curr_pollfd;
sd=listensocks[curr_pollfd];
goto got_fd;
}
} while (curr_pollfd != last_pollfd);
}
}
got_fd:
if (!workers_may_exit) {
if ((rv = ap_accept(&csd, sd, ptrans)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
"ap_accept");
}
if ((rv = SAFE_ACCEPT(ap_unlock(process_accept_mutex)))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"ap_unlock failed. Attempting to shutdown "
"process gracefully.");
workers_may_exit = 1;
}
pthread_mutex_unlock(&thread_accept_mutex);
process_socket(ptrans, csd, process_slot * HARD_THREAD_LIMIT + thread_slot);
requests_this_child--;
}
else {
if ((rv = SAFE_ACCEPT(ap_unlock(process_accept_mutex)))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"ap_unlock failed. Attempting to shutdown "
"process gracefully.");
workers_may_exit = 1;
}
pthread_mutex_unlock(&thread_accept_mutex);
break;
}
ap_clear_pool(ptrans);
}
ap_destroy_pool(tpool);
ap_update_child_status(process_slot, thread_slot, SERVER_DEAD,
(request_rec *) NULL);
pthread_mutex_lock(&worker_thread_count_mutex);
worker_thread_count--;
if (worker_thread_count == 0) {
/* All the threads have exited, now finish the shutdown process
* by signalling the sigwait thread */
kill(ap_my_pid, SIGTERM);
}
pthread_mutex_unlock(&worker_thread_count_mutex);
return NULL;
}
#endif
static void child_main(int child_num_arg)
{
sigset_t sig_mask;
int signal_received;
int i;
ap_listen_rec *lr;
ap_status_t rv;
ap_my_pid = getpid();
child_num = child_num_arg;
ap_create_pool(&pchild, pconf);
/*stuff to do before we switch id's, so we have permissions.*/
#ifndef DEXTER
reopen_scoreboard(pchild);
#endif
rv = SAFE_ACCEPT(ap_child_init_lock(&process_accept_mutex, lock_fname,
pchild));
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
"Couldn't initialize cross-process lock in child");
clean_child_exit(APEXIT_CHILDFATAL);
}
if (unixd_setup_child()) {
clean_child_exit(APEXIT_CHILDFATAL);
}
ap_child_init_hook(pchild, ap_server_conf);
/*done with init critical section */
/* All threads should mask signals out, accoring to sigwait(2) man page */
sigfillset(&sig_mask);
#if defined(SIGPROCMASK_SETS_THREAD_MASK) || defined (NO_THREADS)
if (sigprocmask(SIG_SETMASK, &sig_mask, NULL) != 0) {
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, "sigprocmask");
}
#else
if (pthread_sigmask(SIG_SETMASK, &sig_mask, NULL) != 0) {
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, "pthread_sigmask");
}
#endif
requests_this_child = ap_max_requests_per_child;
/* Set up the pollfd array */
listensocks = ap_pcalloc(pchild,
sizeof(*listensocks) * (num_listensocks + 1));
#if APR_FILES_AS_SOCKETS
ap_socket_from_file(&listensocks[0], pipe_of_death_in);
#endif
for (lr = ap_listeners, i = 1; i <= num_listensocks; lr = lr->next, ++i)
listensocks[i]=lr->sd;
/* Setup worker threads */
#ifdef DEXTER
if (ap_threads_per_child > max_threads) {
ap_threads_per_child = max_threads;
}
idle_thread_count = ap_threads_per_child;
for (i = 0; i < max_threads; i++) {
worker_thread_free_ids[i] = i;
}
ap_create_pool(&thread_pool_parent, pchild);
pthread_mutex_init(&thread_pool_parent_mutex, NULL);
pthread_mutex_init(&idle_thread_count_mutex, NULL);
#endif
worker_thread_count = 0;
pthread_mutex_init(&worker_thread_count_mutex, NULL);
pthread_mutex_init(&pipe_of_death_mutex, NULL);
pthread_attr_init(&worker_thread_attr);
#ifdef PTHREAD_ATTR_SETDETACHSTATE_ARG2_ADDR
{
int on = 1;
pthread_attr_setdetachstate(&worer_thread_attr, &on);
}
#else
pthread_attr_setdetachstate(&worker_thread_attr, PTHREAD_CREATE_DETACHED);
#endif
for (i=0; i < ap_threads_per_child; i++) {
/* start_thread shouldn't fail here */
if (!start_thread()) {
break;
}
}
#ifndef DEXTER
pthread_attr_destroy(&worker_thread_attr);
#endif
/* This thread will be the one responsible for handling signals */
sigemptyset(&sig_mask);
sigaddset(&sig_mask, SIGTERM);
sigaddset(&sig_mask, SIGINT);
ap_sigwait(&sig_mask, &signal_received);
switch (signal_received) {
case SIGTERM:
case SIGINT:
just_die(signal_received);
break;
default:
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
"received impossible signal: %d", signal_received);
just_die(SIGTERM);
}
}
static int make_child(server_rec *s, int slot, time_t now)
{
int pid;
if (slot + 1 > ap_max_daemons_limit) {
ap_max_daemons_limit = slot + 1;
}
if (one_process) {
set_signals();
#ifdef DEXTER
/* TODO scoreboard stuff -- rbb */
ap_child_table[slot].pid = getpid();
ap_child_table[slot].status = SERVER_ALIVE;
#else
ap_scoreboard_image->parent[slot].pid = getpid();
#endif
child_main(slot);
}
#ifndef DEXTER
/* TODO scoreboard stuff -- rbb */
/* Tag this slot as occupied so that perform_idle_server_maintenance
* doesn't try to steal it */
(void) ap_update_child_status(slot, 0, SERVER_STARTING, (request_rec *) NULL);
#endif
if ((pid = fork()) == -1) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, "fork: Unable to fork new process");
#ifndef DEXTER
/* TODO scoreboard stuff -- rbb */
/* fork didn't succeed. Fix the scoreboard or else
* it will say SERVER_STARTING forever and ever
*/
(void) ap_update_child_status(slot, 0, SERVER_DEAD, (request_rec *) NULL);
#endif
/* In case system resources are maxxed out, we don't want
* Apache running away with the CPU trying to fork over and
* over and over again.
*/
sleep(10);
return -1;
}
if (!pid) {
#ifdef AIX_BIND_PROCESSOR
/* By default, AIX binds to a single processor. This bit unbinds
children which will then bind to another CPU.
*/
#include <sys/processor.h>
int status = bindprocessor(BINDPROCESS, (int)getpid(),
PROCESSOR_CLASS_ANY);
if (status != OK)
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING,
ap_server_conf, "processor unbind failed %d", status);
#endif
RAISE_SIGSTOP(MAKE_CHILD);
#ifndef DEXTER
/* TODO: This needs to be seriously looked into */
ap_signal(SIGTERM, just_die);
#endif
child_main(slot);
return 0;
}
/* else */
#ifdef DEXTER
/* TODO scoreboard stuff -- rbb */
ap_child_table[slot].pid = pid;
ap_child_table[slot].status = SERVER_ALIVE;
#else
ap_scoreboard_image->parent[slot].pid = pid;
#endif
return 0;
}
/* start up a bunch of children */
#ifdef DEXTER
static int startup_children(int number_to_start)
#else
static void startup_children(int number_to_start)
#endif
{
int i;
for (i = 0; number_to_start && i < ap_daemons_to_start; ++i) {
#ifdef DEXTER
/* TODO: scoreboard stuff -- rbb */
if (ap_child_table[i].status != SERVER_DEAD) {
#else
if (ap_scoreboard_image->parent[i].pid != 0) {
#endif
continue;
}
if (make_child(ap_server_conf, i, 0) < 0) {
break;
}
--number_to_start;
}
#ifdef DEXTER
return number_to_start;
#endif
}
/*
* idle_spawn_rate is the number of children that will be spawned on the
* next maintenance cycle if there aren't enough idle servers. It is
* doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
* without the need to spawn.
*/
static int idle_spawn_rate = 1;
#ifndef MAX_SPAWN_RATE
#define MAX_SPAWN_RATE (32)
#endif
static int hold_off_on_exponential_spawning;
#ifdef DEXTER
static void perform_idle_server_maintenance(void)
{
int i;
time_t now = 0;
int free_length;
int free_slots[MAX_SPAWN_RATE];
int last_non_dead = -1;
/* initialize the free_list */
free_length = 0;
for (i = 0; i < ap_daemons_to_start; ++i) {
if (ap_child_table[i].status == SERVER_DEAD) {
if (free_length < idle_spawn_rate) {
free_slots[free_length] = i;
++free_length;
}
}
else {
last_non_dead = i;
}
if (i >= ap_max_daemons_limit && free_length >= idle_spawn_rate) {
break;
}
}
ap_max_daemons_limit = last_non_dead + 1;
if (free_length > 0) {
for (i = 0; i < free_length; ++i) {
make_child(ap_server_conf, free_slots[i], now);
}
/* the next time around we want to spawn twice as many if this
* wasn't good enough, but not if we've just done a graceful
*/
if (hold_off_on_exponential_spawning) {
--hold_off_on_exponential_spawning;
}
else if (idle_spawn_rate < MAX_SPAWN_RATE) {
idle_spawn_rate *= 2;
}
}
else {
idle_spawn_rate = 1;
}
}
#else
static void perform_idle_server_maintenance(void)
{
int i, j;
int idle_thread_count;
thread_score *ss;
time_t now = 0;
int free_length;
int free_slots[MAX_SPAWN_RATE];
int last_non_dead;
int total_non_dead;
ap_ssize_t one = 1;
ap_status_t rv;
/* initialize the free_list */
free_length = 0;
idle_thread_count = 0;
last_non_dead = -1;
total_non_dead = 0;
ap_sync_scoreboard_image();
for (i = 0; i < ap_max_daemons_limit; ++i) {
/* Initialization to satisfy the compiler. It doesn't know
* that ap_threads_per_child is always > 0 */
int status = SERVER_DEAD;
int any_dying_threads = 0;
int all_dead_threads = 1;
int idle_thread_addition = 0;
if (i >= ap_max_daemons_limit && free_length == idle_spawn_rate)
break;
for (j = 0; j < ap_threads_per_child; j++) {
ss = &ap_scoreboard_image->servers[i][j];
status = ss->status;
any_dying_threads = any_dying_threads || (status == SERVER_DEAD)
|| (status == SERVER_GRACEFUL);
all_dead_threads = all_dead_threads && (status == SERVER_DEAD);
/* We consider a starting server as idle because we started it
* at least a cycle ago, and if it still hasn't finished starting
* then we're just going to swamp things worse by forking more.
* So we hopefully won't need to fork more if we count it.
* This depends on the ordering of SERVER_READY and SERVER_STARTING.
*/
if (status <= SERVER_READY) {
++idle_thread_addition;
}
}
if (all_dead_threads && free_length < idle_spawn_rate) {
free_slots[free_length] = i;
++free_length;
}
if (!all_dead_threads) {
last_non_dead = i;
}
if (!any_dying_threads) {
++total_non_dead;
idle_thread_count += idle_thread_addition;
}
}
ap_max_daemons_limit = last_non_dead + 1;
if (idle_thread_count > max_spare_threads) {
/* Kill off one child */
char char_of_death = '!';
if ((rv = ap_write(pipe_of_death_out, &char_of_death, &one)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, "write pipe_of_death");
}
idle_spawn_rate = 1;
}
else if (idle_thread_count < min_spare_threads) {
/* terminate the free list */
if (free_length == 0) {
/* only report this condition once */
static int reported = 0;
if (!reported) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, ap_server_conf,
"server reached MaxClients setting, consider"
" raising the MaxClients setting");
reported = 1;
}
idle_spawn_rate = 1;
}
else {
if (idle_spawn_rate >= 8) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, ap_server_conf,
"server seems busy, (you may need "
"to increase StartServers, ThreadsPerChild "
"or Min/MaxSparetThreads), "
"spawning %d children, there are around %d idle "
"threads, and %d total children", idle_spawn_rate,
idle_thread_count, total_non_dead);
}
for (i = 0; i < free_length; ++i) {
make_child(ap_server_conf, free_slots[i], now);
}
/* the next time around we want to spawn twice as many if this
* wasn't good enough, but not if we've just done a graceful
*/
if (hold_off_on_exponential_spawning) {
--hold_off_on_exponential_spawning;
}
else if (idle_spawn_rate < MAX_SPAWN_RATE) {
idle_spawn_rate *= 2;
}
}
}
else {
idle_spawn_rate = 1;
}
}
#endif
static void server_main_loop(int remaining_children_to_start)
{
int child_slot;
ap_wait_t status;
ap_proc_t pid;
int i;
while (!restart_pending && !shutdown_pending) {
ap_wait_or_timeout(&status, &pid, pconf);
if (pid.pid != -1) {
process_child_status(&pid, status);
#ifdef DEXTER
/* TODO: scoreboard stuff -- rbb */
/* non-fatal death... note that it's gone in the child table and
* clean out the status table. */
child_slot = -1;
for (i = 0; i < ap_max_daemons_limit; ++i) {
if (ap_child_table[i].pid == pid.pid) {
int j;
child_slot = i;
for (j = 0; j < HARD_THREAD_LIMIT; j++) {
ap_dexter_force_reset_connection_status(i * HARD_THREAD_LIMIT + j);
}
break;
}
}
if (child_slot >= 0) {
ap_child_table[child_slot].status = SERVER_DEAD;
#else
/* non-fatal death... note that it's gone in the scoreboard. */
child_slot = find_child_by_pid(&pid);
if (child_slot >= 0) {
ap_mpmt_pthread_force_reset_connection_status(child_slot);
for (i = 0; i < ap_threads_per_child; i++)
ap_update_child_status(child_slot, i, SERVER_DEAD, (request_rec *) NULL);
#endif
if (remaining_children_to_start
#ifdef DEXTER
&& child_slot < ap_daemons_to_start) {
#else
&& child_slot < ap_max_daemons_limit) {
#endif
/* we're still doing a 1-for-1 replacement of dead
* children with new children
*/
make_child(ap_server_conf, child_slot, time(NULL));
--remaining_children_to_start;
}
#ifdef APR_HAS_OTHER_CHILD
}
else if (ap_reap_other_child(&pid, status) == 0) {
/* handled */
#endif
}
else if (is_graceful) {
/* Great, we've probably just lost a slot in the
* scoreboard. Somehow we don't know about this child.
*/
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0,
ap_server_conf,
"long lost child came home! (pid %ld)",
(long)pid.pid);
}
/* Don't perform idle maintenance when a child dies,
* only do it when there's a timeout. Remember only a
* finite number of children can die, and it's pretty
* pathological for a lot to die suddenly.
*/
continue;
}
else if (remaining_children_to_start) {
/* we hit a 1 second timeout in which none of the previous
* generation of children needed to be reaped... so assume
* they're all done, and pick up the slack if any is left.
*/
#ifdef DEXTER
remaining_children_to_start = \
startup_children(remaining_children_to_start);
#else
startup_children(remaining_children_to_start);
remaining_children_to_start = 0;
#endif
/* In any event we really shouldn't do the code below because
* few of the servers we just started are in the IDLE state
* yet, so we'd mistakenly create an extra server.
*/
continue;
}
perform_idle_server_maintenance();
}
}
int ap_mpm_run(ap_pool_t *_pconf, ap_pool_t *plog, server_rec *s)
{
int remaining_children_to_start;
ap_status_t rv;
ap_ssize_t one = 1;
int i;
pconf = _pconf;
ap_server_conf = s;
rv = ap_create_pipe(&pipe_of_death_in, &pipe_of_death_out, pconf);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv,
(const server_rec*) ap_server_conf,
"ap_create_pipe (pipe_of_death)");
exit(1);
}
if ((rv = ap_set_pipe_timeout(pipe_of_death_in, 0)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv,
(const server_rec*) ap_server_conf,
"ap_set_pipe_timeout (pipe_of_death)");
exit(1);
}
ap_server_conf = s;
if ((num_listensocks = setup_listeners(ap_server_conf)) < 1) {
/* XXX: hey, what's the right way for the mpm to indicate a fatal error? */
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, 0, s,
"no listening sockets available, shutting down");
return 1;
}
ap_log_pid(pconf, ap_pid_fname);
/* Initialize cross-process accept lock */
lock_fname = ap_psprintf(_pconf, "%s.%u",
ap_server_root_relative(_pconf, lock_fname),
ap_my_pid);
rv = ap_create_lock(&process_accept_mutex, APR_MUTEX, APR_CROSS_PROCESS,
lock_fname, _pconf);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
"Couldn't create cross-process lock");
return 1;
}
if (!is_graceful) {
reinit_scoreboard(pconf);
}
#ifdef DEXTER
/* TODO: scoreboard stuff -- rbb */
/* Initialize the child table */
if (!is_graceful) {
for (i = 0; i < HARD_SERVER_LIMIT; i++) {
ap_child_table[i].status = SERVER_DEAD;
}
}
#endif
set_signals();
/* Don't thrash... */
#ifndef DEXTER
if (max_spare_threads < min_spare_threads + ap_threads_per_child)
max_spare_threads = min_spare_threads + ap_threads_per_child;
#endif
/* If we're doing a graceful_restart then we're going to see a lot
* of children exiting immediately when we get into the main loop
* below (because we just sent them SIGWINCH). This happens pretty
* rapidly... and for each one that exits we'll start a new one until
* we reach at least daemons_min_free. But we may be permitted to
* start more than that, so we'll just keep track of how many we're
* supposed to start up without the 1 second penalty between each fork.
*/
remaining_children_to_start = ap_daemons_to_start;
#ifndef DEXTER
if (remaining_children_to_start > ap_max_daemons_limit) {
remaining_children_to_start = ap_max_daemons_limit;
}
#endif
if (!is_graceful) {
#ifdef DEXTER
remaining_children_to_start = \
startup_children(remaining_children_to_start);
#else
startup_children(remaining_children_to_start);
remaining_children_to_start = 0;
#endif
}
else {
/* give the system some time to recover before kicking into
* exponential mode */
hold_off_on_exponential_spawning = 10;
}
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"%s configured -- resuming normal operations",
ap_get_server_version());
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, ap_server_conf,
"Server built: %s", ap_get_server_built());
restart_pending = shutdown_pending = 0;
server_main_loop(remaining_children_to_start);
if (shutdown_pending) {
/* Time to gracefully shut down:
* Kill child processes, tell them to call child_exit, etc...
*/
if (unixd_killpg(getpgrp(), SIGTERM) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "killpg SIGTERM");
}
ap_reclaim_child_processes(1); /* Start with SIGTERM */
/* cleanup pid file on normal shutdown */
{
const char *pidfile = NULL;
pidfile = ap_server_root_relative (pconf, ap_pid_fname);
if ( pidfile != NULL && unlink(pidfile) == 0)
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0,
ap_server_conf,
"removed PID file %s (pid=%ld)",
pidfile, (long)getpid());
}
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"caught SIGTERM, shutting down");
return 1;
}
/* we've been told to restart */
ap_signal(SIGHUP, SIG_IGN);
if (one_process) {
/* not worth thinking about */
return 1;
}
#ifndef DEXTER
/* advance to the next generation */
/* XXX: we really need to make sure this new generation number isn't in
* use by any of the children.
*/
++ap_my_generation;
ap_scoreboard_image->global.running_generation = ap_my_generation;
update_scoreboard_global();
#endif
if (is_graceful) {
#ifndef DEXTER
int j;
#endif
char char_of_death = '!';
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"SIGWINCH received. Doing graceful restart");
/* This is mostly for debugging... so that we know what is still
* gracefully dealing with existing request.
*/
#ifdef DEXTER
for (i = 0; i < ap_daemons_to_start; ++i) {
if (ap_child_table[i].status != SERVER_DEAD) {
ap_child_table[i].status = SERVER_DYING;
}
}
#else
for (i = 0; i < ap_max_daemons_limit; ++i) {
for (j = 0; j < ap_threads_per_child; j++) {
if (ap_scoreboard_image->servers[i][j].status != SERVER_DEAD) {
ap_scoreboard_image->servers[i][j].status = SERVER_GRACEFUL;
}
}
}
#endif
/* give the children the signal to die */
#ifdef DEXTER
for (i = 0; i < ap_daemons_to_start; ++i) {
#else
for (i = 0; i < ap_max_daemons_limit;) {
#endif
if ((rv = ap_write(pipe_of_death_in, &char_of_death, &one))
!= APR_SUCCESS) {
if (ap_canonical_error(rv) == APR_EINTR) continue;
ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf,
"write pipe_of_death");
}
}
}
else {
/* Kill 'em all. Since the child acts the same on the parents SIGTERM
* and a SIGHUP, we may as well use the same signal, because some user
* pthreads are stealing signals from us left and right.
*/
if (unixd_killpg(getpgrp(), SIGTERM) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "killpg SIGTERM");
}
ap_reclaim_child_processes(1); /* Start with SIGTERM */
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"SIGHUP received. Attempting to restart");
}
#ifndef DEXTER
if (!is_graceful) {
ap_restart_time = time(NULL);
}
#endif
return 0;
}
static void mpmt_pre_config(ap_pool_t *pconf, ap_pool_t *plog, ap_pool_t *ptemp)
{
static int restart_num = 0;
one_process = !!getenv("ONE_PROCESS");
/* sigh, want this only the second time around */
if (restart_num++ == 1) {
is_graceful = 0;
if (!one_process) {
ap_detach();
}
ap_my_pid = getpid();
}
unixd_pre_config();
ap_listen_pre_config();
ap_daemons_to_start = DEFAULT_START_DAEMON;
min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
ap_max_daemons_limit = HARD_SERVER_LIMIT;
ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
ap_pid_fname = DEFAULT_PIDLOG;
ap_scoreboard_fname = DEFAULT_SCOREBOARD;
lock_fname = DEFAULT_LOCKFILE;
ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
#ifdef DEXTER
max_threads = HARD_THREAD_LIMIT;
ap_dexter_set_maintain_connection_status(1);
#else
ap_extended_status = 0;
#endif
ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
}
static void mpmt_hooks(void)
{
INIT_SIGLIST()
one_process = 0;
ap_hook_pre_config(mpmt_pre_config, NULL, NULL, AP_HOOK_MIDDLE);
}
static const char *set_pidfile(cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
if (cmd->server->is_virtual) {
return "PidFile directive not allowed in <VirtualHost>";
}
ap_pid_fname = arg;
return NULL;
}
static const char *set_scoreboard(cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_scoreboard_fname = arg;
return NULL;
}
static const char *set_lockfile(cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
lock_fname = arg;
return NULL;
}
static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_daemons_to_start = atoi(arg);
return NULL;
}
static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
min_spare_threads = atoi(arg);
if (min_spare_threads <= 0) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: detected MinSpareThreads set to non-positive.");
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"Resetting to 1 to avoid almost certain Apache failure.");
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"Please read the documentation.");
min_spare_threads = 1;
}
return NULL;
}
static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
max_spare_threads = atoi(arg);
return NULL;
}
static const char *set_server_limit (cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_max_daemons_limit = atoi(arg);
if (ap_max_daemons_limit > HARD_SERVER_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: MaxClients of %d exceeds compile time limit "
"of %d servers,", ap_max_daemons_limit, HARD_SERVER_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" lowering MaxClients to %d. To increase, please "
"see the", HARD_SERVER_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" HARD_SERVER_LIMIT define in %s.",
AP_MPM_HARD_LIMITS_FILE);
ap_max_daemons_limit = HARD_SERVER_LIMIT;
}
else if (ap_max_daemons_limit < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "WARNING: Require MaxClients > 0, setting to 1\n");
ap_max_daemons_limit = 1;
}
return NULL;
}
static const char *set_threads_per_child (cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_threads_per_child = atoi(arg);
if (ap_threads_per_child > HARD_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: ThreadsPerChild of %d exceeds compile time"
"limit of %d threads,", ap_threads_per_child,
HARD_THREAD_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" lowering ThreadsPerChild to %d. To increase, please"
" see the", HARD_THREAD_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" HARD_THREAD_LIMIT define in %s.",
AP_MPM_HARD_LIMITS_FILE);
}
else if (ap_threads_per_child < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: Require ThreadsPerChild > 0, setting to 1");
ap_threads_per_child = 1;
}
return NULL;
}
#ifdef DEXTER
static const char *set_max_threads(cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) { return err;
}
max_threads = atoi(arg);
if (max_threads > HARD_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: detected MaxThreadsPerChild set higher than");
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"HARD_THREAD_LIMIT. Resetting to %d", HARD_THREAD_LIMIT);
max_threads = HARD_THREAD_LIMIT;
}
return NULL;
}
#endif
static const char *set_max_requests(cmd_parms *cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_max_requests_per_child = atoi(arg);
return NULL;
}
static const char *set_coredumpdir (cmd_parms *cmd, void *dummy,
const char *arg)
{
ap_finfo_t finfo;
const char *fname;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
fname = ap_server_root_relative(cmd->pool, arg);
if ((ap_stat(&finfo, fname, cmd->pool) != APR_SUCCESS) ||
(finfo.filetype != APR_DIR)) {
return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
" does not exist or is not a directory", NULL);
}
ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
return NULL;
}
static const command_rec mpmt_cmds[] = {
UNIX_DAEMON_COMMANDS
LISTEN_COMMANDS
AP_INIT_TAKE1("PidFile", set_pidfile, NULL, RSRC_CONF,
"A file for logging the server process ID"),
AP_INIT_TAKE1("ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF,
"A file for Apache to maintain runtime process management information"),
AP_INIT_TAKE1("LockFile", set_lockfile, NULL, RSRC_CONF,
"The lockfile used when Apache needs to lock the accept() call"),
AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
"Number of child processes launched at server startup"),
AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
"Minimum number of idle children, to handle request spikes"),
AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
"Maximum number of idle children"),
AP_INIT_TAKE1("MaxClients", set_server_limit, NULL, RSRC_CONF,
"Maximum number of children alive at the same time"),
#ifdef DEXTER
AP_INIT_TAKE1("MaxThreadsPerChild", set_max_threads, NULL, RSRC_CONF,
"Maximum number of threads per child"),
#else
AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
"Number of threads each child creates"),
#endif
AP_INIT_TAKE1("MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF,
"Maximum number of requests a particular child serves before dying."),
AP_INIT_TAKE1("CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF,
"The location of the directory Apache changes to before dumping core"),
{ NULL }
};
module MODULE_VAR_EXPORT mpm_mpmt_module = {
MPM20_MODULE_STUFF,
NULL, /* hook to run before apache parses args */
NULL, /* create per-directory config structure */
NULL, /* merge per-directory config structures */
NULL, /* create per-server config structure */
NULL, /* merge per-server config structures */
mpmt_cmds, /* command ap_table_t */
NULL, /* handlers */
mpmt_hooks /* register_hooks */
};
1.1 apache-2.0/src/modules/mpm/mpmt/scoreboard.c
Index: scoreboard.c
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#include "apr_portable.h"
#include "ap_config.h"
#include "httpd.h"
#include "http_log.h"
#include "http_main.h"
#include "http_core.h"
#include "http_config.h"
#include "unixd.h"
#include "http_conf_globals.h"
#include "mpm_status.h"
#include "mpm.h"
#include "scoreboard.h"
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef DEXTER
static scoreboard *ap_scoreboard_image = NULL;
/*****************************************************************
*
* Dealing with the scoreboard... a lot of these variables are global
* only to avoid getting clobbered by the longjmp() that happens when
* a hard timeout expires...
*
* We begin with routines which deal with the file itself...
*/
#if APR_HAS_SHARED_MEMORY
#include "apr_shmem.h"
static ap_shmem_t *scoreboard_shm = NULL;
static ap_status_t cleanup_shared_mem(void *d)
{
ap_shm_free(scoreboard_shm, ap_scoreboard_image);
ap_scoreboard_image = NULL;
ap_shm_destroy(scoreboard_shm);
return APR_SUCCESS;
}
static void setup_shared_mem(ap_pool_t *p)
{
char buf[512];
const char *fname;
fname = ap_server_root_relative(p, ap_scoreboard_fname);
if (ap_shm_init(&scoreboard_shm, SCOREBOARD_SIZE + 40, fname, p) != APR_SUCCESS) {
ap_snprintf(buf, sizeof(buf), "%s: could not open(create) scoreboard",
ap_server_argv0);
perror(buf);
exit(APEXIT_INIT);
}
ap_scoreboard_image = ap_shm_malloc(scoreboard_shm, SCOREBOARD_SIZE);
if (ap_scoreboard_image == NULL) {
ap_snprintf(buf, sizeof(buf), "%s: cannot allocate scoreboard",
ap_server_argv0);
perror(buf);
ap_shm_destroy(scoreboard_shm);
exit(APEXIT_INIT);
}
ap_register_cleanup(p, NULL, cleanup_shared_mem, ap_null_cleanup);
}
void reinit_scoreboard(ap_pool_t *p)
{
if (ap_scoreboard_image == NULL) {
setup_shared_mem(p);
}
memset(ap_scoreboard_image, 0, SCOREBOARD_SIZE);
}
#endif /* APR_SHARED_MEM */
/****
* Above code is shmem code. Below code is interacting with the shmem
****/
static int maintain_connection_status = 1;
void ap_dexter_set_maintain_connection_status(int flag) {
maintain_connection_status = flag;
return;
}
/* Useful to erase the status of children that might be from previous
* generations */
void ap_dexter_force_reset_connection_status(long conn_id)
{
int i;
for (i = 0; i < STATUSES_PER_CONNECTION; i++) {
ap_scoreboard_image->table[conn_id][i].key[0] = '\0';
}
}
void ap_reset_connection_status(long conn_id)
{
if (maintain_connection_status) {
ap_dexter_force_reset_connection_status(conn_id);
}
}
/* Don't mess with the string you get back from this function */
const char *ap_get_connection_status(long conn_id, const char *key)
{
int i = 0;
status_table_entry *ss;
if (!maintain_connection_status) return "";
while (i < STATUSES_PER_CONNECTION) {
ss = &(ap_scoreboard_image->table[conn_id][i]);
if (ss->key[0] == '\0') { break;
}
if (0 == strcmp(ss->key, key)) {
return ss->value;
}
}
return NULL;
}
ap_array_header_t *ap_get_connections(ap_pool_t *p)
{
int i;
ap_array_header_t *connection_list;
long *array_slot;
connection_list = ap_make_array(p, 0, sizeof(long));
/* We assume that there is a connection iff it has an entry in the status
* table. Connections without any status sound problematic to me, so this
* is probably for the best. - manoj */
for (i = 0; i < ap_max_daemons_limit*HARD_THREAD_LIMIT; i++) {
if (ap_scoreboard_image->table[i][0].key[0] != '\0') {
array_slot = ap_push_array(connection_list);
*array_slot = i;
}
}
return connection_list;
}
ap_array_header_t *ap_get_connection_keys(ap_pool_t *p, long conn_id)
{
int i = 0;
status_table_entry *ss;
ap_array_header_t *key_list;
char **array_slot;
key_list = ap_make_array(p, 0, KEY_LENGTH * sizeof(char));
while (i < STATUSES_PER_CONNECTION) {
ss = &(ap_scoreboard_image->table[conn_id][i]);
if (ss->key[0] == '\0') {
break;
}
array_slot = ap_push_array(key_list);
*array_slot = ap_pstrdup(p, ss->key);
i++;
}
return key_list;
}
/* Note: no effort is made here to prevent multiple threads from messing with
* a single connection at the same time. ap_update_connection_status should
* only be called by the thread that owns the connection */
void ap_update_connection_status(long conn_id, const char *key,
const char *value)
{
int i = 0;
status_table_entry *ss;
if (!maintain_connection_status) return;
while (i < STATUSES_PER_CONNECTION) {
ss = &(ap_scoreboard_image->table[conn_id][i]);
if (ss->key[0] == '\0') {
break;
} if (0 == strcmp(ss->key, key)) {
ap_cpystrn(ss->value, value, VALUE_LENGTH);
return;
}
i++;
}
/* Not found. Add an entry for this value */
if (i >= STATUSES_PER_CONNECTION) {
/* No room. Oh well, not much anyone can do about it. */
return;
}
ap_cpystrn(ss->key, key, KEY_LENGTH);
ap_cpystrn(ss->value, value, VALUE_LENGTH);
return;
}
ap_array_header_t *ap_get_status_table(ap_pool_t *p)
{
int i, j;
ap_array_header_t *server_status;
ap_status_table_row_t *array_slot;
status_table_entry *ss;
server_status = ap_make_array(p, 0, sizeof(ap_status_table_row_t));
/* Go ahead and return what's in the connection status table even if we
* aren't maintaining it. We can at least look at what children from
* previous generations are up to. */
for (i = 0; i < ap_max_daemons_limit*HARD_THREAD_LIMIT; i++) {
if (ap_scoreboard_image->table[i][0].key[0] == '\0')
continue;
array_slot = ap_push_array(server_status);
array_slot->data = ap_make_table(p, 0);
array_slot->conn_id = i;
for (j = 0; j < STATUSES_PER_CONNECTION; j++) {
ss = &(ap_scoreboard_image->table[i][j]);
if (ss->key[0] != '\0') {
ap_table_add(array_slot->data, ss->key, ss->value);
}
else {
break;
}
}
}
return server_status;
}
#else
scoreboard *ap_scoreboard_image = NULL;
new_scoreboard *ap_new_scoreboard_image = NULL;
static int maintain_connection_status = 1;
/*****************************************************************
*
* Dealing with the scoreboard... a lot of these variables are global
* only to avoid getting clobbered by the longjmp() that happens when
* a hard timeout expires...
*
* We begin with routines which deal with the file itself...
*/
#if APR_HAS_SHARED_MEMORY
#include "apr_shmem.h"
static ap_shmem_t *scoreboard_shm = NULL;
static ap_status_t cleanup_shared_mem(void *d)
{
ap_shm_free(scoreboard_shm, ap_scoreboard_image);
ap_scoreboard_image = NULL;
ap_shm_destroy(scoreboard_shm);
return APR_SUCCESS;
}
static void setup_shared_mem(ap_pool_t *p)
{
char buf[512];
const char *fname;
fname = ap_server_root_relative(p, ap_scoreboard_fname);
if (ap_shm_init(&scoreboard_shm, SCOREBOARD_SIZE + NEW_SCOREBOARD_SIZE + 40, fname, p) != APR_SUCCESS) {
ap_snprintf(buf, sizeof(buf), "%s: could not open(create) scoreboard",
ap_server_argv0);
perror(buf);
exit(APEXIT_INIT);
}
ap_scoreboard_image = ap_shm_malloc(scoreboard_shm, SCOREBOARD_SIZE);
ap_new_scoreboard_image = ap_shm_malloc(scoreboard_shm, NEW_SCOREBOARD_SIZE);
if (ap_scoreboard_image == NULL || ap_new_scoreboard_image == NULL) {
ap_snprintf(buf, sizeof(buf), "%s: cannot allocate scoreboard",
ap_server_argv0);
perror(buf);
ap_shm_destroy(scoreboard_shm);
exit(APEXIT_INIT);
}
ap_register_cleanup(p, NULL, cleanup_shared_mem, ap_null_cleanup);
ap_scoreboard_image->global.running_generation = 0;
}
void reopen_scoreboard(ap_pool_t *p)
{
}
#endif /* APR_SHARED_MEM */
/* Called by parent process */
void reinit_scoreboard(ap_pool_t *p)
{
int running_gen = 0;
if (ap_scoreboard_image)
running_gen = ap_scoreboard_image->global.running_generation;
if (ap_scoreboard_image == NULL) {
setup_shared_mem(p);
}
memset(ap_scoreboard_image, 0, SCOREBOARD_SIZE);
ap_scoreboard_image->global.running_generation = running_gen;
}
/* Routines called to deal with the scoreboard image
* --- note that we do *not* need write locks, since update_child_status
* only updates a *single* record in place, and only one process writes to
* a given scoreboard slot at a time (either the child process owning that
* slot, or the parent, noting that the child has died).
*
* As a final note --- setting the score entry to getpid() is always safe,
* since when the parent is writing an entry, it's only noting SERVER_DEAD
* anyway.
*/
ap_inline void ap_sync_scoreboard_image(void)
{
}
API_EXPORT(int) ap_exists_scoreboard_image(void)
{
return (ap_scoreboard_image ? 1 : 0);
}
static ap_inline void put_scoreboard_info(int child_num, int thread_num,
thread_score *new_score_rec)
{
/* XXX - needs to be fixed to account for threads */
#ifdef SCOREBOARD_FILE
lseek(scoreboard_fd, (long) child_num * sizeof(thread_score), 0);
force_write(scoreboard_fd, new_score_rec, sizeof(thread_score));
#endif
}
void update_scoreboard_global(void)
{
#ifdef SCOREBOARD_FILE
lseek(scoreboard_fd,
(char *) &ap_scoreboard_image->global -(char *) ap_scoreboard_image, 0);
force_write(scoreboard_fd, &ap_scoreboard_image->global,
sizeof ap_scoreboard_image->global);
#endif
}
void increment_counts(int child_num, int thread_num, request_rec *r)
{
long int bs = 0;
thread_score *ss;
ss = &ap_scoreboard_image->servers[child_num][thread_num];
if (r->sent_bodyct)
ap_bgetopt(r->connection->client, BO_BYTECT, &bs);
#ifdef HAVE_TIMES
times(&ss->times);
#endif
ss->access_count++;
ss->my_access_count++;
ss->conn_count++;
ss->bytes_served += (unsigned long) bs;
ss->my_bytes_served += (unsigned long) bs;
ss->conn_bytes += (unsigned long) bs;
put_scoreboard_info(child_num, thread_num, ss);
}
API_EXPORT(int) find_child_by_pid(ap_proc_t *pid)
{
int i;
int max_daemons_limit = ap_get_max_daemons();
for (i = 0; i < max_daemons_limit; ++i)
if (ap_scoreboard_image->parent[i].pid == pid->pid)
return i;
return -1;
}
int ap_update_child_status(int child_num, int thread_num, int status, request_rec *r)
{
int old_status;
thread_score *ss;
parent_score *ps;
if (child_num < 0)
return -1;
ss = &ap_scoreboard_image->servers[child_num][thread_num];
old_status = ss->status;
ss->status = status;
ps = &ap_scoreboard_image->parent[child_num];
if ((status == SERVER_READY || status == SERVER_ACCEPTING)
&& old_status == SERVER_STARTING) {
ss->tid = pthread_self();
ps->worker_threads = ap_threads_per_child;
}
if (ap_extended_status) {
if (status == SERVER_READY || status == SERVER_DEAD) {
/*
* Reset individual counters
*/
if (status == SERVER_DEAD) {
ss->my_access_count = 0L;
ss->my_bytes_served = 0L;
}
ss->conn_count = (unsigned short) 0;
ss->conn_bytes = (unsigned long) 0;
}
if (r) {
conn_rec *c = r->connection;
ap_cpystrn(ss->client, ap_get_remote_host(c, r->per_dir_config,
REMOTE_NOLOOKUP), sizeof(ss->client));
if (r->the_request == NULL) {
ap_cpystrn(ss->request, "NULL", sizeof(ss->request));
} else if (r->parsed_uri.password == NULL) {
ap_cpystrn(ss->request, r->the_request, sizeof(ss->request));
} else {
/* Don't reveal the password in the server-status view */
ap_cpystrn(ss->request, ap_pstrcat(r->pool, r->method, " ",
ap_unparse_uri_components(r->pool, &r->parsed_uri, UNP_OMITPASSWORD),
r->assbackwards ? NULL : " ", r->protocol, NULL),
sizeof(ss->request));
}
ss->vhostrec = r->server;
}
}
put_scoreboard_info(child_num, thread_num, ss);
return old_status;
}
void ap_time_process_request(int child_num, int thread_num, int status)
{
thread_score *ss;
if (child_num < 0)
return;
ss = &ap_scoreboard_image->servers[child_num][thread_num];
if (status == START_PREQUEST) {
ss->start_time = ap_now();
}
else if (status == STOP_PREQUEST) {
ss->stop_time = ap_now();
}
put_scoreboard_info(child_num, thread_num, ss);
}
/* Useful to erase the status of children that might be from previous
* generations */
void ap_mpmt_pthread_force_reset_connection_status(long conn_id)
{
int i;
for (i = 0; i < STATUSES_PER_CONNECTION; i++) { ap_new_scoreboard_image->table[conn_id][i].key[0] = '\0';
} }
void ap_reset_connection_status(long conn_id)
{
if (maintain_connection_status) {
ap_mpmt_pthread_force_reset_connection_status(conn_id);
}
}
/* Don't mess with the string you get back from this function */
const char *ap_get_connection_status(long conn_id, const char *key)
{
int i = 0;
status_table_entry *ss;
if (!maintain_connection_status) return "";
while (i < STATUSES_PER_CONNECTION) { ss = &(ap_new_scoreboard_image->table[conn_id][i]);
if (ss->key[0] == '\0') { break;
}
if (0 == strcmp(ss->key, key)) {
return ss->value;
}
}
return NULL;
}
ap_array_header_t *ap_get_connections(ap_pool_t *p)
{
int i;
ap_array_header_t *connection_list;
long *array_slot;
int max_daemons_limit = ap_get_max_daemons();
connection_list = ap_make_array(p, 0, sizeof(long));
/* We assume that there is a connection iff it has an entry in the status
* table. Connections without any status sound problematic to me, so this
* is probably for the best. - manoj */
for (i = 0; i < max_daemons_limit*HARD_THREAD_LIMIT; i++) {
if (ap_new_scoreboard_image->table[i][0].key[0] != '\0') {
array_slot = ap_push_array(connection_list);
*array_slot = i;
}
}
return connection_list;
}
ap_array_header_t *ap_get_connection_keys(ap_pool_t *p, long conn_id)
{
int i = 0;
status_table_entry *ss;
ap_array_header_t *key_list;
char **array_slot;
key_list = ap_make_array(p, 0, KEY_LENGTH * sizeof(char));
while (i < STATUSES_PER_CONNECTION) {
ss = &(ap_new_scoreboard_image->table[conn_id][i]);
if (ss->key[0] == '\0') {
break;
}
array_slot = ap_push_array(key_list);
*array_slot = ap_pstrdup(p, ss->key);
i++;
}
return key_list;
}
/* Note: no effort is made here to prevent multiple threads from messing with
* a single connection at the same time. ap_update_connection_status should
* only be called by the thread that owns the connection */
void ap_update_connection_status(long conn_id, const char *key,
const char *value)
{
int i = 0;
status_table_entry *ss;
if (!maintain_connection_status) return;
while (i < STATUSES_PER_CONNECTION) {
ss = &(ap_new_scoreboard_image->table[conn_id][i]);
if (ss->key[0] == '\0') { break;
} if (0 == strcmp(ss->key, key)) {
ap_cpystrn(ss->value, value, VALUE_LENGTH);
return;
}
i++;
}
/* Not found. Add an entry for this value */
if (i >= STATUSES_PER_CONNECTION) {
/* No room. Oh well, not much anyone can do about it. */
return;
}
ap_cpystrn(ss->key, key, KEY_LENGTH);
ap_cpystrn(ss->value, value, VALUE_LENGTH);
return;
}
ap_array_header_t *ap_get_status_table(ap_pool_t *p)
{
int i, j;
ap_array_header_t *server_status;
ap_status_table_row_t *array_slot;
int max_daemons_limit = ap_get_max_daemons();
status_table_entry *ss;
server_status = ap_make_array(p, 0, sizeof(ap_status_table_row_t));
/* Go ahead and return what's in the connection status table even if we
* aren't maintaining it. We can at least look at what children from
* previous generations are up to. */
for (i = 0; i < max_daemons_limit*HARD_THREAD_LIMIT; i++) {
if (ap_new_scoreboard_image->table[i][0].key[0] == '\0')
continue;
array_slot = ap_push_array(server_status);
array_slot->data = ap_make_table(p, 0);
array_slot->conn_id = i;
for (j = 0; j < STATUSES_PER_CONNECTION; j++) {
ss = &(ap_new_scoreboard_image->table[i][j]);
if (ss->key[0] != '\0') {
ap_table_add(array_slot->data, ss->key, ss->value);
}
else {
break;
}
}
}
return server_status;
}
#endif
1.1 apache-2.0/src/modules/mpm/mpmt/scoreboard.h
Index: scoreboard.h
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#ifndef APACHE_SCOREBOARD_H
#define APACHE_SCOREBOARD_H
#include <pthread.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef HAVE_SYS_TIMES_H
#include <sys/time.h>
#include <sys/times.h>
#elif defined(TPF)
#include <time.h>
#endif
#include "mpm_default.h" /* For HARD_.*_LIMIT */
/*The optimized timeout code only works if we're not using a scoreboard file*/
#if defined(USE_MEM_BASED_SCOREBOARD)
#define OPTIMIZE_TIMEOUTS
#endif
#ifdef DEXTER
void reinit_scoreboard(ap_pool_t *p);
API_EXPORT(void) reopen_scoreboard(ap_pool_t *p);
/* The stuff for Dexter's status table */
#include "mpm_status.h"
void ap_dexter_set_maintain_connection_status(int flag);
void ap_dexter_force_reset_connection_status(long conn_id);
#define KEY_LENGTH 16
#define VALUE_LENGTH 64
typedef struct {
char key[KEY_LENGTH];
char value[VALUE_LENGTH];
} status_table_entry;
#define STATUSES_PER_CONNECTION 10
typedef struct {
status_table_entry
table[HARD_SERVER_LIMIT*HARD_THREAD_LIMIT][STATUSES_PER_CONNECTION];
} scoreboard;
#define SCOREBOARD_SIZE sizeof(scoreboard)
API_VAR_EXPORT extern const char *ap_scoreboard_fname;
#else
/* Scoreboard info on a process is, for now, kept very brief ---
* just status value and pid (the latter so that the caretaker process
* can properly update the scoreboard when a process dies). We may want
* to eventually add a separate set of long_score structures which would
* give, for each process, the number of requests serviced, and info on
* the current, or most recent, request.
*
* Status values:
*/
#define SERVER_DEAD 0
#define SERVER_STARTING 1 /* Server Starting up */
#define SERVER_READY 2 /* Waiting for connection (or accept() lock) */
#define SERVER_BUSY_READ 3 /* Reading a client request */
#define SERVER_BUSY_WRITE 4 /* Processing a client request */
#define SERVER_BUSY_KEEPALIVE 5 /* Waiting for more requests via keepalive */
#define SERVER_BUSY_LOG 6 /* Logging the request */
#define SERVER_BUSY_DNS 7 /* Looking up a hostname */
#define SERVER_GRACEFUL 8 /* server is gracefully finishing request */
#define SERVER_ACCEPTING 9 /* thread is accepting connections */
#define SERVER_QUEUEING 10 /* thread is putting connection on the queue */
#define SERVER_NUM_STATUS 11 /* number of status settings */
/* A "virtual time" is simply a counter that indicates that a child is
* making progress. The parent checks up on each child, and when they have
* made progress it resets the last_rtime element. But when the child hasn't
* made progress in a time that's roughly timeout_len seconds long, it is
* sent a SIGALRM.
*
* vtime is an optimization that is used only when the scoreboard is in
* shared memory (it's not easy/feasible to do it in a scoreboard file).
* The essential observation is that timeouts rarely occur, the vast majority
* of hits finish before any timeout happens. So it really sucks to have to
* ask the operating system to set up and destroy alarms many times during
* a request.
*/
typedef unsigned vtime_t;
/* Type used for generation indicies. Startup and every restart cause a
* new generation of children to be spawned. Children within the same
* generation share the same configuration information -- pointers to stuff
* created at config time in the parent are valid across children. For
* example, the vhostrec pointer in the scoreboard below is valid in all
* children of the same generation.
*
* The safe way to access the vhost pointer is like this:
*
* short_score *ss = pointer to whichver slot is interesting;
* parent_score *ps = pointer to whichver slot is interesting;
* server_rec *vh = ss->vhostrec;
*
* if (ps->generation != ap_my_generation) {
* vh = NULL;
* }
*
* then if vh is not NULL it's valid in this child.
*
* This avoids various race conditions around restarts.
*/
typedef int ap_generation_t;
/* stuff which is thread specific */
typedef struct {
#ifdef OPTIMIZE_TIMEOUTS
vtime_t cur_vtime; /* the child's current vtime */
unsigned short timeout_len; /* length of the timeout */
#endif
pthread_t tid;
unsigned char status;
unsigned long access_count;
unsigned long bytes_served;
unsigned long my_access_count;
unsigned long my_bytes_served;
unsigned long conn_bytes;
unsigned short conn_count;
ap_time_t start_time;
ap_time_t stop_time;
#ifdef HAVE_TIMES
struct tms times;
#endif
#ifndef OPTIMIZE_TIMEOUTS
time_t last_used;
#endif
char client[32]; /* Keep 'em small... */
char request[64]; /* We just want an idea... */
server_rec *vhostrec; /* What virtual host is being accessed? */
/* SEE ABOVE FOR SAFE USAGE! */
} thread_score;
typedef struct {
ap_generation_t running_generation; /* the generation of children which
* should still be serving requests. */
} global_score;
/* stuff which the parent generally writes and the children rarely read */
typedef struct {
pid_t pid;
ap_generation_t generation; /* generation of this child */
int worker_threads;
#ifdef OPTIMIZE_TIMEOUTS
time_t last_rtime; /* time(0) of the last change */
vtime_t last_vtime; /* the last vtime the parent has seen */
#endif
} parent_score;
typedef struct {
thread_score servers[HARD_SERVER_LIMIT][HARD_THREAD_LIMIT];
parent_score parent[HARD_SERVER_LIMIT];
global_score global;
} scoreboard;
#define KEY_LENGTH 16
#define VALUE_LENGTH 64
typedef struct {
char key[KEY_LENGTH];
char value[VALUE_LENGTH];
} status_table_entry;
#define STATUSES_PER_CONNECTION 10
typedef struct {
status_table_entry
table[HARD_SERVER_LIMIT*HARD_THREAD_LIMIT][STATUSES_PER_CONNECTION];
} new_scoreboard;
#define SCOREBOARD_SIZE sizeof(scoreboard)
#define NEW_SCOREBOARD_SIZE sizeof(new_scoreboard)
#ifdef TPF
#define SCOREBOARD_NAME "SCOREBRD"
#define SCOREBOARD_FRAMES SCOREBOARD_SIZE/4095 + 1
#endif
API_EXPORT(int) ap_exists_scoreboard_image(void);
void reinit_scoreboard(ap_pool_t *p);
void cleanup_scoreboard(void);
API_EXPORT(void) ap_sync_scoreboard_image(void);
void ap_mpmt_pthread_force_reset_connection_status(long conn_id);
API_EXPORT(void) reopen_scoreboard(ap_pool_t *p);
ap_inline void ap_sync_scoreboard_image(void);
void increment_counts(int child_num, int thread_num, request_rec *r);
void update_scoreboard_global(void);
API_EXPORT(int) find_child_by_pid(ap_proc_t *pid);
int ap_update_child_status(int child_num, int thread_num, int status, request_rec *r);
void ap_time_process_request(int child_num, int thread_num, int status);
API_VAR_EXPORT extern scoreboard *ap_scoreboard_image;
API_VAR_EXPORT extern const char *ap_scoreboard_fname;
API_VAR_EXPORT extern ap_generation_t volatile ap_my_generation;
/* for time_process_request() in http_main.c */
#define START_PREQUEST 1
#define STOP_PREQUEST 2
#endif
#ifdef __cplusplus
}
#endif
#endif /* !APACHE_SCOREBOARD_H */
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