mirror of
https://github.com/apache/httpd.git
synced 2025-11-06 16:49:32 +03:00
dd6569995c
configured value is not a multiple of the number of threads per child. We said we did previously but we forgot to. git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91880 13f79535-47bb-0310-9956-ffa450edef68
1672 lines
57 KiB
C
1672 lines
57 KiB
C
/* ====================================================================
|
|
* The Apache Software License, Version 1.1
|
|
*
|
|
* Copyright (c) 2000-2001 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.
|
|
*/
|
|
|
|
/* The purpose of this MPM is to fix the design flaws in the threaded
|
|
* model. Because of the way that pthreads and mutex locks interact,
|
|
* it is basically impossible to cleanly gracefully shutdown a child
|
|
* process if multiple threads are all blocked in accept. This model
|
|
* fixes those problems.
|
|
*/
|
|
|
|
#include "apr.h"
|
|
#include "apr_portable.h"
|
|
#include "apr_strings.h"
|
|
#include "apr_file_io.h"
|
|
#include "apr_thread_proc.h"
|
|
#include "apr_signal.h"
|
|
#include "apr_thread_mutex.h"
|
|
#include "apr_proc_mutex.h"
|
|
#define APR_WANT_STRFUNC
|
|
#include "apr_want.h"
|
|
|
|
#if APR_HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if APR_HAVE_SYS_SOCKET_H
|
|
#include <sys/socket.h>
|
|
#endif
|
|
#if APR_HAVE_SYS_WAIT_H
|
|
#include <sys/wait.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_PROCESSOR_H
|
|
#include <sys/processor.h> /* for bindprocessor() */
|
|
#endif
|
|
|
|
#if !APR_HAS_THREADS
|
|
#error The Worker MPM requires APR threads, but they are unavailable.
|
|
#endif
|
|
|
|
#define CORE_PRIVATE
|
|
|
|
#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 "ap_listen.h"
|
|
#include "scoreboard.h"
|
|
#include "fdqueue.h"
|
|
|
|
#include <signal.h>
|
|
#include <limits.h> /* for INT_MAX */
|
|
|
|
/*
|
|
* Actual definitions of config globals
|
|
*/
|
|
|
|
int ap_threads_per_child=0; /* Worker threads per child */
|
|
static int ap_daemons_to_start=0;
|
|
static int min_spare_threads=0;
|
|
static int max_spare_threads=0;
|
|
static int ap_daemons_limit=0;
|
|
static int dying = 0;
|
|
static int workers_may_exit = 0;
|
|
static int requests_this_child;
|
|
static int num_listensocks = 0;
|
|
static apr_socket_t **listensocks;
|
|
static fd_queue_t *worker_queue;
|
|
|
|
/* The structure used to pass unique initialization info to each thread */
|
|
typedef struct {
|
|
int pid;
|
|
int tid;
|
|
int sd;
|
|
} proc_info;
|
|
|
|
/* Structure used to pass information to the thread responsible for
|
|
* creating the rest of the threads.
|
|
*/
|
|
typedef struct {
|
|
apr_thread_t **threads;
|
|
int child_num_arg;
|
|
apr_threadattr_t *threadattr;
|
|
} thread_starter;
|
|
|
|
/*
|
|
* The max child slot ever assigned, preserved across restarts. Necessary
|
|
* to deal with MaxClients changes across AP_SIG_GRACEFUL restarts. We
|
|
* use this value to optimize routines that have to scan the entire
|
|
* scoreboard.
|
|
*/
|
|
int ap_max_daemons_limit = -1;
|
|
|
|
char ap_coredump_dir[MAX_STRING_LEN];
|
|
|
|
static apr_file_t *pipe_of_death_in = NULL;
|
|
static apr_file_t *pipe_of_death_out = NULL;
|
|
/* insures that a child process only consumes one character */
|
|
static apr_thread_mutex_t *pipe_of_death_mutex;
|
|
|
|
/* *Non*-shared http_main globals... */
|
|
|
|
server_rec *ap_server_conf;
|
|
|
|
/* The worker MPM respects a couple of runtime flags that can aid
|
|
* in debugging. Setting the -DNO_DETACH flag will prevent the root process
|
|
* from detaching from its controlling terminal. Additionally, setting
|
|
* the -DONE_PROCESS flag (which implies -DNO_DETACH) will get you the
|
|
* child_main loop running in the process which originally started up.
|
|
* This gives you 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 apr_pool_t *pconf; /* Pool for config stuff */
|
|
static apr_pool_t *pchild; /* Pool for httpd child stuff */
|
|
|
|
static pid_t ap_my_pid; /* Linux getpid() doesn't work except in main
|
|
thread. Use this instead */
|
|
static pid_t parent_pid;
|
|
/* Keep track of the number of worker threads currently active */
|
|
static int worker_thread_count;
|
|
static apr_thread_mutex_t *worker_thread_count_mutex;
|
|
|
|
/* Locks for accept serialization */
|
|
static apr_proc_mutex_t *accept_mutex;
|
|
static const char *lock_fname;
|
|
|
|
#ifdef NO_SERIALIZED_ACCEPT
|
|
#define SAFE_ACCEPT(stmt) APR_SUCCESS
|
|
#else
|
|
#define SAFE_ACCEPT(stmt) (stmt)
|
|
#endif
|
|
|
|
static void signal_workers(void)
|
|
{
|
|
workers_may_exit = 1;
|
|
/* XXX: This will happen naturally on a graceful, and we don't care otherwise.
|
|
ap_queue_signal_all_wakeup(worker_queue); */
|
|
ap_queue_interrupt_all(worker_queue);
|
|
}
|
|
|
|
AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result)
|
|
{
|
|
switch(query_code){
|
|
case AP_MPMQ_MAX_DAEMON_USED:
|
|
*result = ap_max_daemons_limit;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_IS_THREADED:
|
|
*result = AP_MPMQ_STATIC;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_IS_FORKED:
|
|
*result = AP_MPMQ_DYNAMIC;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_HARD_LIMIT_DAEMONS:
|
|
*result = HARD_SERVER_LIMIT;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_HARD_LIMIT_THREADS:
|
|
*result = HARD_THREAD_LIMIT;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MAX_THREADS:
|
|
*result = ap_threads_per_child;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MIN_SPARE_DAEMONS:
|
|
*result = 0;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MIN_SPARE_THREADS:
|
|
*result = min_spare_threads;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MAX_SPARE_DAEMONS:
|
|
*result = 0;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MAX_SPARE_THREADS:
|
|
*result = max_spare_threads;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MAX_REQUESTS_DAEMON:
|
|
*result = ap_max_requests_per_child;
|
|
return APR_SUCCESS;
|
|
case AP_MPMQ_MAX_DAEMONS:
|
|
*result = ap_daemons_limit;
|
|
return APR_SUCCESS;
|
|
}
|
|
return APR_ENOTIMPL;
|
|
}
|
|
|
|
/* 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) {
|
|
apr_pool_destroy(pchild);
|
|
}
|
|
exit(code);
|
|
}
|
|
|
|
/* handle all varieties of core dumping signals */
|
|
static void sig_coredump(int sig)
|
|
{
|
|
chdir(ap_coredump_dir);
|
|
apr_signal(sig, SIG_DFL);
|
|
if (ap_my_pid == parent_pid) {
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
|
|
0, ap_server_conf,
|
|
"seg fault or similar nasty error detected "
|
|
"in the parent process");
|
|
|
|
/* XXX we can probably add some rudimentary cleanup code here,
|
|
* like getting rid of the pid file. If any additional bad stuff
|
|
* happens, we are protected from recursive errors taking down the
|
|
* system since this function is no longer the signal handler GLA
|
|
*/
|
|
}
|
|
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;
|
|
ap_generation_t volatile ap_my_generation;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
static 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 */
|
|
static 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;
|
|
if (is_graceful) {
|
|
apr_pool_cleanup_kill(pconf, NULL, ap_cleanup_scoreboard);
|
|
}
|
|
}
|
|
|
|
static void sig_term(int sig)
|
|
{
|
|
ap_start_shutdown();
|
|
}
|
|
|
|
static void restart(int sig)
|
|
{
|
|
ap_start_restart(sig == AP_SIG_GRACEFUL);
|
|
}
|
|
|
|
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 AP_SIG_GRACEFUL while we're busy
|
|
* processing one */
|
|
sigaddset(&sa.sa_mask, SIGHUP);
|
|
sigaddset(&sa.sa_mask, AP_SIG_GRACEFUL);
|
|
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(AP_SIG_GRACEFUL, &sa, NULL) < 0)
|
|
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(" AP_SIG_GRACEFUL_STRING ")");
|
|
#else
|
|
if (!one_process) {
|
|
apr_signal(SIGSEGV, sig_coredump);
|
|
#ifdef SIGBUS
|
|
apr_signal(SIGBUS, sig_coredump);
|
|
#endif /* SIGBUS */
|
|
#ifdef SIGABORT
|
|
apr_signal(SIGABORT, sig_coredump);
|
|
#endif /* SIGABORT */
|
|
#ifdef SIGABRT
|
|
apr_signal(SIGABRT, sig_coredump);
|
|
#endif /* SIGABRT */
|
|
#ifdef SIGILL
|
|
apr_signal(SIGILL, sig_coredump);
|
|
#endif /* SIGILL */
|
|
#ifdef SIGXCPU
|
|
apr_signal(SIGXCPU, SIG_DFL);
|
|
#endif /* SIGXCPU */
|
|
#ifdef SIGXFSZ
|
|
apr_signal(SIGXFSZ, SIG_DFL);
|
|
#endif /* SIGXFSZ */
|
|
}
|
|
|
|
apr_signal(SIGTERM, sig_term);
|
|
#ifdef SIGHUP
|
|
apr_signal(SIGHUP, restart);
|
|
#endif /* SIGHUP */
|
|
#ifdef AP_SIG_GRACEFUL
|
|
apr_signal(AP_SIG_GRACEFUL, restart);
|
|
#endif /* AP_SIG_GRACEFUL */
|
|
#ifdef SIGPIPE
|
|
apr_signal(SIGPIPE, SIG_IGN);
|
|
#endif /* SIGPIPE */
|
|
|
|
#endif
|
|
}
|
|
|
|
/*****************************************************************
|
|
* Here follows a long bunch of generic server bookkeeping stuff...
|
|
*/
|
|
|
|
int ap_graceful_stop_signalled(void)
|
|
/* XXX this is really a bad confusing obsolete name
|
|
* maybe it should be ap_mpm_process_exiting?
|
|
*/
|
|
{
|
|
return workers_may_exit;
|
|
}
|
|
|
|
/*****************************************************************
|
|
* Child process main loop.
|
|
*/
|
|
|
|
static void process_socket(apr_pool_t *p, apr_socket_t *sock, int my_child_num, int my_thread_num)
|
|
{
|
|
conn_rec *current_conn;
|
|
long conn_id = AP_ID_FROM_CHILD_THREAD(my_child_num, my_thread_num);
|
|
int csd;
|
|
|
|
apr_os_sock_get(&csd, 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);
|
|
apr_socket_close(sock);
|
|
return;
|
|
}
|
|
|
|
ap_sock_disable_nagle(sock);
|
|
|
|
current_conn = ap_new_connection(p, ap_server_conf, sock, conn_id);
|
|
if (current_conn) {
|
|
ap_process_connection(current_conn);
|
|
}
|
|
}
|
|
|
|
/* requests_this_child has gone to zero or below. See if the admin coded
|
|
"MaxRequestsPerChild 0", and keep going in that case. Doing it this way
|
|
simplifies the hot path in worker_thread */
|
|
static void check_infinite_requests(void)
|
|
{
|
|
if (ap_max_requests_per_child) {
|
|
signal_workers();
|
|
}
|
|
else {
|
|
/* wow! if you're executing this code, you may have set a record.
|
|
* either this child process has served over 2 billion requests, or
|
|
* you're running a threaded 2.0 on a 16 bit machine.
|
|
*
|
|
* I'll buy pizza and beers at Apachecon for the first person to do
|
|
* the former without cheating (dorking with INT_MAX, or running with
|
|
* uncommitted performance patches, for example).
|
|
*
|
|
* for the latter case, you probably deserve a beer too. Greg Ames
|
|
*/
|
|
|
|
requests_this_child = INT_MAX; /* keep going */
|
|
}
|
|
}
|
|
|
|
/* Sets workers_may_exit if we received a character on the pipe_of_death */
|
|
static void check_pipe_of_death(void)
|
|
{
|
|
apr_thread_mutex_lock(pipe_of_death_mutex);
|
|
if (!workers_may_exit) {
|
|
apr_status_t ret;
|
|
char pipe_read_char;
|
|
apr_size_t n = 1;
|
|
|
|
ret = apr_recv(listensocks[0], &pipe_read_char, &n);
|
|
if (APR_STATUS_IS_EAGAIN(ret)) {
|
|
/* 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. */
|
|
signal_workers();
|
|
}
|
|
}
|
|
apr_thread_mutex_unlock(pipe_of_death_mutex);
|
|
}
|
|
|
|
static void *listener_thread(apr_thread_t *thd, void * dummy)
|
|
{
|
|
proc_info * ti = dummy;
|
|
int process_slot = ti->pid;
|
|
int thread_slot = ti->tid;
|
|
apr_pool_t *tpool = apr_thread_pool_get(thd);
|
|
apr_socket_t *csd = NULL;
|
|
apr_pool_t *ptrans; /* Pool for per-transaction stuff */
|
|
apr_socket_t *sd = NULL;
|
|
int n;
|
|
int curr_pollfd, last_pollfd = 0;
|
|
apr_pollfd_t *pollset;
|
|
apr_status_t rv;
|
|
|
|
free(ti);
|
|
|
|
apr_thread_mutex_lock(worker_thread_count_mutex);
|
|
worker_thread_count++;
|
|
apr_thread_mutex_unlock(worker_thread_count_mutex);
|
|
|
|
apr_poll_setup(&pollset, num_listensocks+1, tpool);
|
|
for(n=0 ; n <= num_listensocks ; ++n)
|
|
apr_poll_socket_add(pollset, listensocks[n], APR_POLLIN);
|
|
|
|
/* TODO: Switch to a system where threads reuse the results from earlier
|
|
poll calls - manoj */
|
|
while (1) {
|
|
/* TODO: requests_this_child should be synchronized - aaron */
|
|
if (requests_this_child <= 0) {
|
|
check_infinite_requests();
|
|
}
|
|
if (workers_may_exit) break;
|
|
|
|
if ((rv = SAFE_ACCEPT(apr_proc_mutex_lock(accept_mutex)))
|
|
!= APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"apr_proc_mutex_lock failed. Attempting to shutdown "
|
|
"process gracefully.");
|
|
signal_workers();
|
|
}
|
|
|
|
while (!workers_may_exit) {
|
|
apr_status_t ret;
|
|
apr_int16_t event;
|
|
|
|
ret = apr_poll(pollset, &n, -1);
|
|
if (ret != APR_SUCCESS) {
|
|
if (APR_STATUS_IS_EINTR(ret)) {
|
|
continue;
|
|
}
|
|
|
|
/* apr_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, "apr_poll: (listen)");
|
|
signal_workers();
|
|
}
|
|
|
|
if (workers_may_exit) break;
|
|
|
|
apr_poll_revents_get(&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? */
|
|
apr_poll_revents_get(&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) {
|
|
/* create a new transaction pool for each accepted socket */
|
|
apr_pool_create(&ptrans, tpool);
|
|
|
|
if ((rv = apr_accept(&csd, sd, ptrans)) != APR_SUCCESS) {
|
|
csd = NULL;
|
|
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
|
|
"apr_accept");
|
|
}
|
|
if ((rv = SAFE_ACCEPT(apr_proc_mutex_unlock(accept_mutex)))
|
|
!= APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"apr_proc_mutex_lock failed. Attempting to "
|
|
"shutdown process gracefully.");
|
|
signal_workers();
|
|
}
|
|
if (csd != NULL) {
|
|
rv = ap_queue_push(worker_queue, csd, ptrans);
|
|
if (rv) {
|
|
/* trash the connection; we couldn't queue the connected
|
|
* socket to a worker
|
|
*/
|
|
apr_socket_close(csd);
|
|
ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf,
|
|
"ap_queue_push failed with error code %d",
|
|
rv);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if ((rv = SAFE_ACCEPT(apr_proc_mutex_unlock(accept_mutex)))
|
|
!= APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"apr_proc_mutex_unlock failed. Attempting to "
|
|
"shutdown process gracefully.");
|
|
signal_workers();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
ap_update_child_status(process_slot, thread_slot, (dying) ? SERVER_DEAD : SERVER_GRACEFUL,
|
|
(request_rec *) NULL);
|
|
dying = 1;
|
|
ap_scoreboard_image->parent[process_slot].quiescing = 1;
|
|
kill(ap_my_pid, SIGTERM);
|
|
|
|
/* Unsure if this can be safely uncommented. -aaron
|
|
apr_thread_exit(thd, APR_SUCCESS);
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
static void *worker_thread(apr_thread_t *thd, void * dummy)
|
|
{
|
|
proc_info * ti = dummy;
|
|
int process_slot = ti->pid;
|
|
int thread_slot = ti->tid;
|
|
apr_socket_t *csd = NULL;
|
|
apr_pool_t *ptrans; /* Pool for per-transaction stuff */
|
|
apr_status_t rv;
|
|
|
|
free(ti);
|
|
|
|
ap_update_child_status(process_slot, thread_slot, SERVER_STARTING, NULL);
|
|
while (!workers_may_exit) {
|
|
ap_update_child_status(process_slot, thread_slot, SERVER_READY, NULL);
|
|
rv = ap_queue_pop(worker_queue, &csd, &ptrans);
|
|
/* We get FD_QUEUE_EINTR whenever ap_queue_pop() has been interrupted
|
|
* from an explicit call to ap_queue_interrupt_all(). This allows
|
|
* us to unblock threads stuck in ap_queue_pop() when a shutdown
|
|
* is pending. */
|
|
if (rv == FD_QUEUE_EINTR || !csd) {
|
|
continue;
|
|
}
|
|
process_socket(ptrans, csd, process_slot, thread_slot);
|
|
requests_this_child--; /* FIXME: should be synchronized - aaron */
|
|
apr_pool_destroy(ptrans);
|
|
}
|
|
|
|
ap_update_child_status(process_slot, thread_slot,
|
|
(dying) ? SERVER_DEAD : SERVER_GRACEFUL, (request_rec *) NULL);
|
|
apr_thread_mutex_lock(worker_thread_count_mutex);
|
|
worker_thread_count--;
|
|
apr_thread_mutex_unlock(worker_thread_count_mutex);
|
|
|
|
apr_thread_exit(thd, APR_SUCCESS);
|
|
return NULL;
|
|
}
|
|
|
|
static int check_signal(int signum)
|
|
{
|
|
switch (signum) {
|
|
case SIGTERM:
|
|
case SIGINT:
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void *start_threads(apr_thread_t *thd, void *dummy)
|
|
{
|
|
thread_starter *ts = dummy;
|
|
apr_thread_t **threads = ts->threads;
|
|
apr_threadattr_t *thread_attr = ts->threadattr;
|
|
int child_num_arg = ts->child_num_arg;
|
|
int my_child_num = child_num_arg;
|
|
proc_info *my_info = NULL;
|
|
apr_status_t rv;
|
|
int i = 0;
|
|
int threads_created = 0;
|
|
apr_thread_t *listener;
|
|
|
|
/* We must create the fd queues before we start up the listener
|
|
* and worker threads. */
|
|
worker_queue = apr_pcalloc(pchild, sizeof(*worker_queue));
|
|
ap_queue_init(worker_queue, ap_threads_per_child, pchild);
|
|
|
|
my_info = (proc_info *)malloc(sizeof(proc_info));
|
|
my_info->pid = my_child_num;
|
|
my_info->tid = i;
|
|
my_info->sd = 0;
|
|
apr_thread_create(&listener, thread_attr, listener_thread, my_info, pchild);
|
|
while (1) {
|
|
/* ap_threads_per_child does not include the listener thread */
|
|
for (i = 0; i < ap_threads_per_child; i++) {
|
|
int status = ap_scoreboard_image->servers[child_num_arg][i].status;
|
|
|
|
if (status != SERVER_GRACEFUL && status != SERVER_DEAD) {
|
|
continue;
|
|
}
|
|
|
|
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 = my_child_num;
|
|
my_info->tid = i;
|
|
my_info->sd = 0;
|
|
|
|
/* We are creating threads right now */
|
|
ap_update_child_status(my_child_num, i, SERVER_STARTING, NULL);
|
|
/* We let each thread update its own scoreboard entry. This is
|
|
* done because it lets us deal with tid better.
|
|
*/
|
|
if ((rv = apr_thread_create(&threads[i], thread_attr, worker_thread, my_info, pchild))) {
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
|
|
"apr_thread_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);
|
|
}
|
|
threads_created++;
|
|
}
|
|
if (workers_may_exit || threads_created == ap_threads_per_child) {
|
|
break;
|
|
}
|
|
sleep(1); /* wait for previous generation to clean up an entry */
|
|
}
|
|
|
|
/* What state should this child_main process be listed as in the scoreboard...?
|
|
* ap_update_child_status(my_child_num, i, SERVER_STARTING, (request_rec *) NULL);
|
|
*
|
|
* This state should be listed separately in the scoreboard, in some kind
|
|
* of process_status, not mixed in with the worker threads' status.
|
|
* "life_status" is almost right, but it's in the worker's structure, and
|
|
* the name could be clearer. gla
|
|
*/
|
|
apr_thread_exit(thd, APR_SUCCESS);
|
|
return NULL;
|
|
}
|
|
|
|
static void child_main(int child_num_arg)
|
|
{
|
|
apr_thread_t **threads;
|
|
int i;
|
|
ap_listen_rec *lr;
|
|
apr_status_t rv;
|
|
thread_starter *ts;
|
|
apr_threadattr_t *thread_attr;
|
|
apr_thread_t *start_thread_id;
|
|
|
|
ap_my_pid = getpid();
|
|
apr_pool_create(&pchild, pconf);
|
|
|
|
/*stuff to do before we switch id's, so we have permissions.*/
|
|
reopen_scoreboard(pchild);
|
|
|
|
rv = SAFE_ACCEPT(apr_proc_mutex_child_init(&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_run_child_init(pchild, ap_server_conf);
|
|
|
|
/* done with init critical section */
|
|
|
|
rv = apr_setup_signal_thread();
|
|
if (rv != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"Couldn't initialize signal thread");
|
|
clean_child_exit(APEXIT_CHILDFATAL);
|
|
}
|
|
|
|
if (ap_max_requests_per_child) {
|
|
requests_this_child = ap_max_requests_per_child;
|
|
}
|
|
else {
|
|
/* coding a value of zero means infinity */
|
|
requests_this_child = INT_MAX;
|
|
}
|
|
|
|
/* Set up the pollfd array */
|
|
listensocks = apr_pcalloc(pchild,
|
|
sizeof(*listensocks) * (num_listensocks + 1));
|
|
#if APR_FILES_AS_SOCKETS
|
|
apr_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 */
|
|
|
|
/* clear the storage; we may not create all our threads immediately, and we want
|
|
* a 0 entry to indicate a thread which was not created
|
|
*/
|
|
threads = (apr_thread_t **)calloc(1, sizeof(apr_thread_t *) * ap_threads_per_child);
|
|
if (threads == NULL) {
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
|
|
"malloc: out of memory");
|
|
clean_child_exit(APEXIT_CHILDFATAL);
|
|
}
|
|
worker_thread_count = 0;
|
|
apr_thread_mutex_create(&worker_thread_count_mutex,
|
|
APR_THREAD_MUTEX_DEFAULT, pchild);
|
|
apr_thread_mutex_create(&pipe_of_death_mutex,
|
|
APR_THREAD_MUTEX_DEFAULT, pchild);
|
|
|
|
ts = (thread_starter *)apr_palloc(pchild, sizeof(*ts));
|
|
|
|
apr_threadattr_create(&thread_attr, pchild);
|
|
apr_threadattr_detach_set(thread_attr, 0); /* 0 means PTHREAD_CREATE_JOINABLE */
|
|
|
|
ts->threads = threads;
|
|
ts->child_num_arg = child_num_arg;
|
|
ts->threadattr = thread_attr;
|
|
|
|
if ((rv = apr_thread_create(&start_thread_id, thread_attr, start_threads, ts, pchild))) {
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
|
|
"apr_thread_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);
|
|
}
|
|
|
|
apr_signal_thread(check_signal);
|
|
|
|
signal_workers(); /* helps us terminate a little more quickly when
|
|
* the dispatch of the signal thread
|
|
* beats the Pipe of Death and the browsers
|
|
*/
|
|
|
|
/* A terminating signal was received. Now join each of the workers to clean them up.
|
|
* If the worker already exited, then the join frees their resources and returns.
|
|
* If the worker hasn't exited, then this blocks until they have (then cleans up).
|
|
*/
|
|
apr_thread_join(&rv, start_thread_id);
|
|
for (i = 0; i < ap_threads_per_child; i++) {
|
|
if (threads[i]) { /* if we ever created this thread */
|
|
apr_thread_join(&rv, threads[i]);
|
|
}
|
|
}
|
|
|
|
free(threads);
|
|
|
|
clean_child_exit(0);
|
|
}
|
|
|
|
static int make_child(server_rec *s, int slot)
|
|
{
|
|
int pid;
|
|
|
|
if (slot + 1 > ap_max_daemons_limit) {
|
|
ap_max_daemons_limit = slot + 1;
|
|
}
|
|
|
|
if (one_process) {
|
|
set_signals();
|
|
ap_scoreboard_image->parent[slot].pid = getpid();
|
|
child_main(slot);
|
|
}
|
|
|
|
if ((pid = fork()) == -1) {
|
|
ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, "fork: Unable to fork new process");
|
|
|
|
/* fork didn't succeed. Fix the scoreboard or else
|
|
* it will say SERVER_STARTING forever and ever
|
|
*/
|
|
ap_update_child_status(slot, 0, SERVER_DEAD, NULL);
|
|
|
|
/* 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 HAVE_BINDPROCESSOR
|
|
/* By default, AIX binds to a single processor. This bit unbinds
|
|
* children which will then bind to another CPU.
|
|
*/
|
|
int status = bindprocessor(BINDPROCESS, (int)getpid(),
|
|
PROCESSOR_CLASS_ANY);
|
|
if (status != OK)
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, ap_server_conf,
|
|
"processor unbind failed %d", status);
|
|
#endif
|
|
RAISE_SIGSTOP(MAKE_CHILD);
|
|
|
|
apr_signal(SIGTERM, just_die);
|
|
child_main(slot);
|
|
|
|
clean_child_exit(0);
|
|
}
|
|
/* else */
|
|
ap_scoreboard_image->parent[slot].quiescing = 0;
|
|
ap_scoreboard_image->parent[slot].pid = pid;
|
|
return 0;
|
|
}
|
|
|
|
/* If there aren't many connections coming in from the network, the child
|
|
* processes may need to be awakened from their network i/o waits.
|
|
* The pipe of death is an effective prod.
|
|
*/
|
|
|
|
static void wake_up_and_die(void)
|
|
{
|
|
int i;
|
|
char char_of_death = '!';
|
|
apr_size_t one = 1;
|
|
apr_status_t rv;
|
|
|
|
for (i = 0; i < ap_daemons_limit;) {
|
|
if ((rv = apr_file_write(pipe_of_death_out, &char_of_death, &one))
|
|
!= APR_SUCCESS) {
|
|
if (APR_STATUS_IS_EINTR(rv)) continue;
|
|
ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf,
|
|
"write pipe_of_death");
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
/* start up a bunch of children */
|
|
static void startup_children(int number_to_start)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
|
|
if (ap_scoreboard_image->parent[i].pid != 0) {
|
|
continue;
|
|
}
|
|
if (make_child(ap_server_conf, i) < 0) {
|
|
break;
|
|
}
|
|
--number_to_start;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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;
|
|
|
|
static void perform_idle_server_maintenance(void)
|
|
{
|
|
int i, j;
|
|
int idle_thread_count;
|
|
worker_score *ws;
|
|
process_score *ps;
|
|
int free_length;
|
|
int totally_free_length = 0;
|
|
int free_slots[MAX_SPAWN_RATE];
|
|
int last_non_dead;
|
|
int total_non_dead;
|
|
apr_size_t one = 1;
|
|
apr_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_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 any_dead_threads = 0;
|
|
int all_dead_threads = 1;
|
|
|
|
if (i >= ap_max_daemons_limit && totally_free_length == idle_spawn_rate)
|
|
break;
|
|
ps = &ap_scoreboard_image->parent[i];
|
|
for (j = 0; j < ap_threads_per_child; j++) {
|
|
ws = &ap_scoreboard_image->servers[i][j];
|
|
status = ws->status;
|
|
|
|
/* XXX any_dying_threads is probably no longer needed GLA */
|
|
any_dying_threads = any_dying_threads || (status == SERVER_GRACEFUL);
|
|
any_dead_threads = any_dead_threads || (status == SERVER_DEAD);
|
|
all_dead_threads = all_dead_threads &&
|
|
(status == SERVER_DEAD ||
|
|
status == SERVER_GRACEFUL);
|
|
|
|
/* 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 && status != SERVER_DEAD &&
|
|
!ps->quiescing &&
|
|
ps->generation == ap_my_generation &&
|
|
/* XXX the following shouldn't be necessary if we clean up
|
|
* properly after seg faults, but we're not yet GLA
|
|
*/
|
|
ps->pid != 0) {
|
|
++idle_thread_count;
|
|
}
|
|
}
|
|
if (any_dead_threads && totally_free_length < idle_spawn_rate
|
|
&& (!ps->pid /* no process in the slot */
|
|
|| ps->quiescing)) { /* or at least one is going away */
|
|
if (all_dead_threads) {
|
|
/* great! we prefer these, because the new process can
|
|
* start more threads sooner. So prioritize this slot
|
|
* by putting it ahead of any slots with active threads.
|
|
*
|
|
* first, make room by moving a slot that's potentially still
|
|
* in use to the end of the array
|
|
*/
|
|
free_slots[free_length] = free_slots[totally_free_length];
|
|
free_slots[totally_free_length++] = i;
|
|
}
|
|
else {
|
|
/* slot is still in use - back of the bus
|
|
*/
|
|
free_slots[free_length] = i;
|
|
}
|
|
++free_length;
|
|
}
|
|
/* XXX if (!ps->quiescing) is probably more reliable GLA */
|
|
if (!any_dying_threads) {
|
|
last_non_dead = i;
|
|
++total_non_dead;
|
|
}
|
|
}
|
|
ap_max_daemons_limit = last_non_dead + 1;
|
|
|
|
if (idle_thread_count > max_spare_threads) {
|
|
char char_of_death = '!';
|
|
/* Kill off one child */
|
|
if ((rv = apr_file_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 (free_length > idle_spawn_rate) {
|
|
free_length = idle_spawn_rate;
|
|
}
|
|
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/MaxSpareThreads), "
|
|
"spawning %d children, there are around %d idle "
|
|
"threads, and %d total children", free_length,
|
|
idle_thread_count, total_non_dead);
|
|
}
|
|
for (i = 0; i < free_length; ++i) {
|
|
make_child(ap_server_conf, free_slots[i]);
|
|
}
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
static void server_main_loop(int remaining_children_to_start)
|
|
{
|
|
int child_slot;
|
|
apr_exit_why_e exitwhy;
|
|
int status;
|
|
apr_proc_t pid;
|
|
int i;
|
|
|
|
while (!restart_pending && !shutdown_pending) {
|
|
ap_wait_or_timeout(&exitwhy, &status, &pid, pconf);
|
|
|
|
if (pid.pid != -1) {
|
|
ap_process_child_status(&pid, exitwhy, status);
|
|
/* non-fatal death... note that it's gone in the scoreboard. */
|
|
child_slot = find_child_by_pid(&pid);
|
|
if (child_slot >= 0) {
|
|
for (i = 0; i < ap_threads_per_child; i++)
|
|
ap_update_child_status(child_slot, i, SERVER_DEAD, (request_rec *) NULL);
|
|
|
|
ap_scoreboard_image->parent[child_slot].pid = 0;
|
|
ap_scoreboard_image->parent[child_slot].quiescing = 0;
|
|
if (remaining_children_to_start
|
|
&& child_slot < ap_daemons_limit) {
|
|
/* we're still doing a 1-for-1 replacement of dead
|
|
* children with new children
|
|
*/
|
|
make_child(ap_server_conf, child_slot);
|
|
--remaining_children_to_start;
|
|
}
|
|
#if APR_HAS_OTHER_CHILD
|
|
}
|
|
else if (apr_proc_other_child_read(&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.
|
|
*/
|
|
startup_children(remaining_children_to_start);
|
|
remaining_children_to_start = 0;
|
|
/* 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(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
|
|
{
|
|
int remaining_children_to_start;
|
|
apr_status_t rv;
|
|
|
|
pconf = _pconf;
|
|
ap_server_conf = s;
|
|
|
|
rv = apr_file_pipe_create(&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,
|
|
"apr_file_pipe_create (pipe_of_death)");
|
|
exit(1);
|
|
}
|
|
|
|
if ((rv = apr_file_pipe_timeout_set(pipe_of_death_in, 0)) != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_ERR, rv,
|
|
(const server_rec*) ap_server_conf,
|
|
"apr_file_pipe_timeout_set (pipe_of_death)");
|
|
exit(1);
|
|
}
|
|
|
|
if ((num_listensocks = ap_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 = apr_psprintf(_pconf, "%s.%" APR_OS_PROC_T_FMT,
|
|
ap_server_root_relative(_pconf, lock_fname),
|
|
ap_my_pid);
|
|
rv = apr_proc_mutex_create_np(&accept_mutex, lock_fname,
|
|
ap_accept_lock_mech, _pconf);
|
|
if (rv != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
|
|
"Couldn't create accept lock");
|
|
return 1;
|
|
}
|
|
|
|
#if APR_USE_SYSVSEM_SERIALIZE
|
|
if (ap_accept_lock_mech == APR_LOCK_DEFAULT ||
|
|
ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
|
|
#else
|
|
if (ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
|
|
#endif
|
|
rv = unixd_set_proc_mutex_perms(accept_mutex);
|
|
if (rv != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
|
|
"Couldn't set permissions on cross-process lock");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (!is_graceful) {
|
|
ap_run_pre_mpm(pconf, SB_SHARED);
|
|
}
|
|
|
|
set_signals();
|
|
/* Don't thrash... */
|
|
if (max_spare_threads < min_spare_threads + ap_threads_per_child)
|
|
max_spare_threads = min_spare_threads + ap_threads_per_child;
|
|
|
|
/* 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 AP_SIG_GRACEFUL). 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;
|
|
if (remaining_children_to_start > ap_daemons_limit) {
|
|
remaining_children_to_start = ap_daemons_limit;
|
|
}
|
|
if (!is_graceful) {
|
|
startup_children(remaining_children_to_start);
|
|
remaining_children_to_start = 0;
|
|
}
|
|
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...
|
|
*/
|
|
wake_up_and_die();
|
|
|
|
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 */
|
|
apr_signal(SIGHUP, SIG_IGN);
|
|
|
|
if (one_process) {
|
|
/* not worth thinking about */
|
|
return 1;
|
|
}
|
|
|
|
/* 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();
|
|
|
|
/* wake up the children...time to die. But we'll have more soon */
|
|
wake_up_and_die();
|
|
|
|
if (is_graceful) {
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
|
|
AP_SIG_GRACEFUL_STRING " received. Doing graceful restart");
|
|
|
|
/* This is mostly for debugging... so that we know what is still
|
|
* gracefully dealing with existing request.
|
|
*/
|
|
|
|
}
|
|
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");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void worker_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
|
|
{
|
|
static int restart_num = 0;
|
|
int no_detach, debug;
|
|
ap_directive_t *pdir;
|
|
ap_directive_t *max_clients = NULL;
|
|
|
|
/* make sure that "ThreadsPerChild" gets set before "MaxClients" */
|
|
for (pdir = ap_conftree; pdir != NULL; pdir = pdir->next) {
|
|
if (strncasecmp(pdir->directive, "ThreadsPerChild", 15) == 0) {
|
|
if (!max_clients) {
|
|
break; /* we're in the clear, got ThreadsPerChild first */
|
|
}
|
|
else {
|
|
/* now to swap the data */
|
|
ap_directive_t temp;
|
|
|
|
temp.directive = pdir->directive;
|
|
temp.args = pdir->args;
|
|
/* Make sure you don't change 'next', or you may get loops! */
|
|
/* XXX: first_child, parent, and data can never be set
|
|
* for these directives, right? -aaron */
|
|
temp.filename = pdir->filename;
|
|
temp.line_num = pdir->line_num;
|
|
|
|
pdir->directive = max_clients->directive;
|
|
pdir->args = max_clients->args;
|
|
pdir->filename = max_clients->filename;
|
|
pdir->line_num = max_clients->line_num;
|
|
|
|
max_clients->directive = temp.directive;
|
|
max_clients->args = temp.args;
|
|
max_clients->filename = temp.filename;
|
|
max_clients->line_num = temp.line_num;
|
|
break;
|
|
}
|
|
}
|
|
else if (!max_clients
|
|
&& strncasecmp(pdir->directive, "MaxClients", 10) == 0) {
|
|
max_clients = pdir;
|
|
}
|
|
}
|
|
|
|
debug = ap_exists_config_define("DEBUG");
|
|
|
|
if (debug)
|
|
no_detach = one_process = 1;
|
|
else
|
|
{
|
|
one_process = ap_exists_config_define("ONE_PROCESS");
|
|
no_detach = ap_exists_config_define("NO_DETACH");
|
|
}
|
|
|
|
/* sigh, want this only the second time around */
|
|
if (restart_num++ == 1) {
|
|
is_graceful = 0;
|
|
|
|
if (!one_process && !no_detach) {
|
|
apr_proc_detach();
|
|
}
|
|
parent_pid = ap_my_pid = getpid();
|
|
}
|
|
|
|
unixd_pre_config(ptemp);
|
|
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_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;
|
|
ap_extended_status = 0;
|
|
|
|
apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
|
|
}
|
|
|
|
static void worker_hooks(apr_pool_t *p)
|
|
{
|
|
one_process = 0;
|
|
|
|
ap_hook_pre_config(worker_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
|
|
}
|
|
|
|
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)
|
|
{
|
|
int max_clients;
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
/* It is ok to use ap_threads_per_child here because we are
|
|
* sure that it gets set before MaxClients in the pre_config stage. */
|
|
max_clients = atoi(arg);
|
|
if (max_clients < ap_threads_per_child) {
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"WARNING: MaxClients (%d) must be at least as large",
|
|
max_clients);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" large as ThreadsPerChild (%d). Automatically",
|
|
ap_threads_per_child);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" increasing MaxClients to %d.",
|
|
ap_threads_per_child);
|
|
max_clients = ap_threads_per_child;
|
|
}
|
|
ap_daemons_limit = max_clients / ap_threads_per_child;
|
|
if ((max_clients > 0) && (max_clients % ap_threads_per_child)) {
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"WARNING: MaxClients (%d) is not an integer multiple",
|
|
max_clients);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" of ThreadsPerChild (%d), lowering MaxClients to %d",
|
|
ap_threads_per_child,
|
|
ap_daemons_limit * ap_threads_per_child);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" for a maximum of %d child processes,",
|
|
ap_daemons_limit);
|
|
max_clients = ap_daemons_limit * ap_threads_per_child;
|
|
}
|
|
if (ap_daemons_limit > HARD_SERVER_LIMIT) {
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"WARNING: MaxClients of %d would require %d servers,",
|
|
max_clients, ap_daemons_limit);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" and would exceed the compile time limit of %d.",
|
|
HARD_SERVER_LIMIT);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" Automatically lowering MaxClients to %d. To increase,",
|
|
HARD_SERVER_LIMIT);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" please see the HARD_SERVER_LIMIT define in %s.",
|
|
AP_MPM_HARD_LIMITS_FILE);
|
|
ap_daemons_limit = HARD_SERVER_LIMIT;
|
|
}
|
|
else if (ap_daemons_limit < 1) {
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "WARNING: Require MaxClients > 0, setting to 1");
|
|
ap_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);
|
|
ap_threads_per_child = HARD_THREAD_LIMIT;
|
|
}
|
|
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;
|
|
}
|
|
|
|
static const command_rec worker_cmds[] = {
|
|
UNIX_DAEMON_COMMANDS
|
|
LISTEN_COMMANDS
|
|
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"),
|
|
AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
|
|
"Number of threads each child creates"),
|
|
{ NULL }
|
|
};
|
|
|
|
module AP_MODULE_DECLARE_DATA mpm_worker_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 */
|
|
worker_cmds, /* command apr_table_t */
|
|
worker_hooks /* register_hooks */
|
|
};
|
|
|