dexter.c revision 6f984345bbfa9342dde1f2b7b8c35b7987d078af
842ae4bd224140319ae7feec1872b93dfd491143fielding/* ====================================================================
842ae4bd224140319ae7feec1872b93dfd491143fielding * The Apache Software License, Version 1.1
842ae4bd224140319ae7feec1872b93dfd491143fielding *
842ae4bd224140319ae7feec1872b93dfd491143fielding * Copyright (c) 2000 The Apache Software Foundation. All rights
842ae4bd224140319ae7feec1872b93dfd491143fielding * reserved.
842ae4bd224140319ae7feec1872b93dfd491143fielding *
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * Redistribution and use in source and binary forms, with or without
04891cf70e0bfc38bfb027541dc821f04c754ff7nd * modification, are permitted provided that the following conditions
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * are met:
04891cf70e0bfc38bfb027541dc821f04c754ff7nd *
04891cf70e0bfc38bfb027541dc821f04c754ff7nd * 1. Redistributions of source code must retain the above copyright
04891cf70e0bfc38bfb027541dc821f04c754ff7nd * notice, this list of conditions and the following disclaimer.
04891cf70e0bfc38bfb027541dc821f04c754ff7nd *
04891cf70e0bfc38bfb027541dc821f04c754ff7nd * 2. Redistributions in binary form must reproduce the above copyright
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * notice, this list of conditions and the following disclaimer in
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * the documentation and/or other materials provided with the
3568de757bac0b47256647504c186d17ca272f85rbb * distribution.
3568de757bac0b47256647504c186d17ca272f85rbb *
3568de757bac0b47256647504c186d17ca272f85rbb * 3. The end-user documentation included with the redistribution,
3568de757bac0b47256647504c186d17ca272f85rbb * if any, must include the following acknowledgment:
3568de757bac0b47256647504c186d17ca272f85rbb * "This product includes software developed by the
3568de757bac0b47256647504c186d17ca272f85rbb * Apache Software Foundation (http://www.apache.org/)."
3568de757bac0b47256647504c186d17ca272f85rbb * Alternately, this acknowledgment may appear in the software itself,
3568de757bac0b47256647504c186d17ca272f85rbb * if and wherever such third-party acknowledgments normally appear.
3568de757bac0b47256647504c186d17ca272f85rbb *
3568de757bac0b47256647504c186d17ca272f85rbb * 4. The names "Apache" and "Apache Software Foundation" must
3568de757bac0b47256647504c186d17ca272f85rbb * not be used to endorse or promote products derived from this
3568de757bac0b47256647504c186d17ca272f85rbb * software without prior written permission. For written
3568de757bac0b47256647504c186d17ca272f85rbb * permission, please contact apache@apache.org.
3568de757bac0b47256647504c186d17ca272f85rbb *
3568de757bac0b47256647504c186d17ca272f85rbb * 5. Products derived from this software may not be called "Apache",
3568de757bac0b47256647504c186d17ca272f85rbb * nor may "Apache" appear in their name, without prior written
3568de757bac0b47256647504c186d17ca272f85rbb * permission of the Apache Software Foundation.
3568de757bac0b47256647504c186d17ca272f85rbb *
3568de757bac0b47256647504c186d17ca272f85rbb * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
3568de757bac0b47256647504c186d17ca272f85rbb * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3568de757bac0b47256647504c186d17ca272f85rbb * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3568de757bac0b47256647504c186d17ca272f85rbb * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
3568de757bac0b47256647504c186d17ca272f85rbb * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
3568de757bac0b47256647504c186d17ca272f85rbb * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
3568de757bac0b47256647504c186d17ca272f85rbb * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
3568de757bac0b47256647504c186d17ca272f85rbb * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
3568de757bac0b47256647504c186d17ca272f85rbb * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
3568de757bac0b47256647504c186d17ca272f85rbb * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
3568de757bac0b47256647504c186d17ca272f85rbb * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3568de757bac0b47256647504c186d17ca272f85rbb * SUCH DAMAGE.
3568de757bac0b47256647504c186d17ca272f85rbb * ====================================================================
3568de757bac0b47256647504c186d17ca272f85rbb *
3568de757bac0b47256647504c186d17ca272f85rbb * This software consists of voluntary contributions made by many
3568de757bac0b47256647504c186d17ca272f85rbb * individuals on behalf of the Apache Software Foundation. For more
3568de757bac0b47256647504c186d17ca272f85rbb * information on the Apache Software Foundation, please see
3568de757bac0b47256647504c186d17ca272f85rbb * <http://www.apache.org/>.
3568de757bac0b47256647504c186d17ca272f85rbb *
3568de757bac0b47256647504c186d17ca272f85rbb * Portions of this software are based upon public domain software
3568de757bac0b47256647504c186d17ca272f85rbb * originally written at the National Center for Supercomputing Applications,
3568de757bac0b47256647504c186d17ca272f85rbb * University of Illinois, Urbana-Champaign.
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding */
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#define CORE_PRIVATE
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
3568de757bac0b47256647504c186d17ca272f85rbb#include "ap_config.h"
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick#include "apr_portable.h"
3568de757bac0b47256647504c186d17ca272f85rbb#include "apr_strings.h"
3568de757bac0b47256647504c186d17ca272f85rbb#include "apr_file_io.h"
3568de757bac0b47256647504c186d17ca272f85rbb#include "httpd.h"
3568de757bac0b47256647504c186d17ca272f85rbb#include "http_main.h"
98fb535f829e2a95aabd82420931f476661fa8e3jorton#include "http_log.h"
db12cd62083041bf90945eeb90cc40fbd2340797trawick#include "http_config.h" /* for read_config */
db12cd62083041bf90945eeb90cc40fbd2340797trawick#include "http_core.h" /* for get_remote_host */
db12cd62083041bf90945eeb90cc40fbd2340797trawick#include "http_connection.h"
333eac96e4fb7d6901cb75e6ca7bb22b2ccb84cetrawick#include "ap_mpm.h"
333eac96e4fb7d6901cb75e6ca7bb22b2ccb84cetrawick#include "unixd.h"
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem#include "mpm_common.h"
3568de757bac0b47256647504c186d17ca272f85rbb#include "ap_listen.h"
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#include "mpm_default.h"
3568de757bac0b47256647504c186d17ca272f85rbb#include "mpm.h"
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#include "scoreboard.h"
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#ifdef HAVE_UNISTD_H
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include <unistd.h>
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#endif
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include <poll.h>
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#ifdef HAVE_SYS_SOCKET_H
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#include <sys/socket.h>
8f3ec4772d2aeb347cf40e87c77627bb784dd018rbb#endif
8f3ec4772d2aeb347cf40e87c77627bb784dd018rbb#ifdef HAVE_NETINET_TCP_H
3d96ee83babeec32482c9082c9426340cee8c44dwrowe#include <netinet/tcp.h>
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding#endif
b6e310e482c42cc323a28fa6fec653e11e0552e5jorton#include <pthread.h>
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick#include <signal.h>
98fb535f829e2a95aabd82420931f476661fa8e3jorton
f0e395a55abfcad3d2bd7c63470003b08a93d567nd/*
f0e395a55abfcad3d2bd7c63470003b08a93d567nd * Actual definitions of config globals
f0e395a55abfcad3d2bd7c63470003b08a93d567nd */
f0e395a55abfcad3d2bd7c63470003b08a93d567nd
98fb535f829e2a95aabd82420931f476661fa8e3jortonstatic int threads_to_start = 0; /* Worker threads per child */
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic int min_spare_threads = 0;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic int max_spare_threads = 0;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic int max_threads = 0;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic int max_requests_per_child = 0;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic const char *ap_pid_fname=NULL;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickAP_DECLARE_DATA const char *ap_scoreboard_fname=NULL;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic int num_daemons=0;
7cd5419264796cfeaf8215383cf0f89130a81fectrawickstatic int workers_may_exit = 0;
3568de757bac0b47256647504c186d17ca272f85rbbstatic int requests_this_child;
41634f717c623556a16b27b25d7d909a66fe20f8wrowestatic int num_listenfds = 0;
3568de757bac0b47256647504c186d17ca272f85rbbstatic apr_socket_t **listenfds;
3568de757bac0b47256647504c186d17ca272f85rbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstruct ap_ctable ap_child_table[HARD_SERVER_LIMIT];
3568de757bac0b47256647504c186d17ca272f85rbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz/*
3568de757bac0b47256647504c186d17ca272f85rbb * The max child slot ever assigned, preserved across restarts. Necessary
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz * to deal with NumServers changes across SIGWINCH restarts. We use this
3568de757bac0b47256647504c186d17ca272f85rbb * value to optimize routines that have to scan the entire child table.
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz *
3568de757bac0b47256647504c186d17ca272f85rbb * XXX - It might not be worth keeping this code in. There aren't very
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * many child processes in this MPM.
41634f717c623556a16b27b25d7d909a66fe20f8wrowe */
3568de757bac0b47256647504c186d17ca272f85rbbint ap_max_daemons_limit = -1;
3568de757bac0b47256647504c186d17ca272f85rbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzchar ap_coredump_dir[MAX_STRING_LEN];
3568de757bac0b47256647504c186d17ca272f85rbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic apr_file_t *pipe_of_death_in = NULL;
3568de757bac0b47256647504c186d17ca272f85rbbstatic apr_file_t *pipe_of_death_out = NULL;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic pthread_mutex_t pipe_of_death_mutex;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding/* *Non*-shared http_main globals... */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
3568de757bac0b47256647504c186d17ca272f85rbbserver_rec *ap_server_conf;
fc1efab92032301e317f07e1b3a00082d9d71f3frbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz/* one_process --- debugging mode variable; can be set from the command line
24b534291150023e6b68eca89ddd33e475ccddc0wrowe * with the -X flag. If set, this gets you the child_main loop running
3568de757bac0b47256647504c186d17ca272f85rbb * in the process which originally started up (no detach, no make_child),
24b534291150023e6b68eca89ddd33e475ccddc0wrowe * which is a pretty nice debugging environment. (You'll get a SIGHUP
3568de757bac0b47256647504c186d17ca272f85rbb * early in standalone_main; just continue through. This is the server
24b534291150023e6b68eca89ddd33e475ccddc0wrowe * trying to kill off any child processes which it might have lying
24b534291150023e6b68eca89ddd33e475ccddc0wrowe * around --- Apache doesn't keep track of their pids, it just sends
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz * SIGHUP to the process group, ignoring it in the root process.
3568de757bac0b47256647504c186d17ca272f85rbb * Continue through and you'll be fine.).
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
3568de757bac0b47256647504c186d17ca272f85rbbstatic int one_process = 0;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#ifdef DEBUG_SIGSTOP
3568de757bac0b47256647504c186d17ca272f85rbbint raise_sigstop_flags;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#endif
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
3568de757bac0b47256647504c186d17ca272f85rbbstatic apr_pool_t *pconf; /* Pool for config stuff */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic apr_pool_t *pchild; /* Pool for httpd child stuff */
3568de757bac0b47256647504c186d17ca272f85rbbstatic apr_pool_t *thread_pool_parent; /* Parent of per-thread pools */
3568de757bac0b47256647504c186d17ca272f85rbbstatic pthread_mutex_t thread_pool_parent_mutex;
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbbstatic int child_num;
3568de757bac0b47256647504c186d17ca272f85rbbstatic unsigned int my_pid; /* Linux getpid() doesn't work except in
3568de757bac0b47256647504c186d17ca272f85rbb main thread. Use this instead */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz/* Keep track of the number of worker threads currently active */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic int worker_thread_count;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic pthread_mutex_t worker_thread_count_mutex;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic int worker_thread_free_ids[HARD_THREAD_LIMIT];
3568de757bac0b47256647504c186d17ca272f85rbbstatic pthread_attr_t worker_thread_attr;
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb/* Keep track of the number of idle worker threads */
3568de757bac0b47256647504c186d17ca272f85rbbstatic int idle_thread_count;
3568de757bac0b47256647504c186d17ca272f85rbbstatic pthread_mutex_t idle_thread_count_mutex;
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb/* Locks for accept serialization */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#ifdef NO_SERIALIZED_ACCEPT
3568de757bac0b47256647504c186d17ca272f85rbb#define SAFE_ACCEPT(stmt) APR_SUCCESS
3568de757bac0b47256647504c186d17ca272f85rbb#else
3568de757bac0b47256647504c186d17ca272f85rbb#define SAFE_ACCEPT(stmt) (stmt)
3568de757bac0b47256647504c186d17ca272f85rbbstatic apr_lock_t *accept_mutex;
3568de757bac0b47256647504c186d17ca272f85rbb#endif /* NO_SERIALIZED_ACCEPT */
3568de757bac0b47256647504c186d17ca272f85rbbstatic const char *lock_fname;
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbbAP_DECLARE(int) ap_get_max_daemons(void)
3568de757bac0b47256647504c186d17ca272f85rbb{
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding return ap_max_daemons_limit;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding}
3568de757bac0b47256647504c186d17ca272f85rbb
239f998fbee5ac5b114b965bb76e217cce0003edstoddard/* a clean exit from a child with proper cleanup */
78ae889ffe0fdfab72f56c6993b0f302cb48da55rbbstatic void clean_child_exit(int code)
3568de757bac0b47256647504c186d17ca272f85rbb{
6653a33e820463abd4f81915b7a1eba0f602e200brianp if (pchild) {
6653a33e820463abd4f81915b7a1eba0f602e200brianp apr_destroy_pool(pchild);
6653a33e820463abd4f81915b7a1eba0f602e200brianp }
41634f717c623556a16b27b25d7d909a66fe20f8wrowe exit(code);
41634f717c623556a16b27b25d7d909a66fe20f8wrowe}
6653a33e820463abd4f81915b7a1eba0f602e200brianp
3568de757bac0b47256647504c186d17ca272f85rbb/* handle all varieties of core dumping signals */
ad83978f20c7d1a4323059d9af122e56fcd353bdstoddardstatic void sig_coredump(int sig)
6653a33e820463abd4f81915b7a1eba0f602e200brianp{
7cd5419264796cfeaf8215383cf0f89130a81fectrawick chdir(ap_coredump_dir);
3568de757bac0b47256647504c186d17ca272f85rbb apr_signal(sig, SIG_DFL);
6653a33e820463abd4f81915b7a1eba0f602e200brianp kill(getpid(), sig);
6653a33e820463abd4f81915b7a1eba0f602e200brianp /* At this point we've got sig blocked, because we're still inside
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm * the signal handler. When we leave the signal handler it will
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm * be unblocked, and we'll take the signal... and coredump or whatever
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick * is appropriate for this particular Unix. In addition the parent
36c8049de63c446926139936c3d195330a0539cetrawick * will see the real signal we received -- whereas if we called
3568de757bac0b47256647504c186d17ca272f85rbb * abort() here, the parent would only see SIGABRT.
dd028aa8111afb6534fece555e8c2d408894671etrawick */
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding}
e8f95a682820a599fe41b22977010636be5c2717jim
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic void just_die(int sig)
ca53a74f4012a45cbad48e940eddf27d866981f9dougm{
ca53a74f4012a45cbad48e940eddf27d866981f9dougm clean_child_exit(0);
ca53a74f4012a45cbad48e940eddf27d866981f9dougm}
dd028aa8111afb6534fece555e8c2d408894671etrawick
dd028aa8111afb6534fece555e8c2d408894671etrawick/*****************************************************************
6653a33e820463abd4f81915b7a1eba0f602e200brianp * Connection structures and accounting...
6653a33e820463abd4f81915b7a1eba0f602e200brianp */
6653a33e820463abd4f81915b7a1eba0f602e200brianp
6653a33e820463abd4f81915b7a1eba0f602e200brianp/* volatile just in case */
6653a33e820463abd4f81915b7a1eba0f602e200brianpstatic int volatile shutdown_pending;
6653a33e820463abd4f81915b7a1eba0f602e200brianpstatic int volatile restart_pending;
6653a33e820463abd4f81915b7a1eba0f602e200brianpstatic int volatile is_graceful;
6653a33e820463abd4f81915b7a1eba0f602e200brianp
6653a33e820463abd4f81915b7a1eba0f602e200brianp/*
6653a33e820463abd4f81915b7a1eba0f602e200brianp * ap_start_shutdown() and ap_start_restart(), below, are a first stab at
6653a33e820463abd4f81915b7a1eba0f602e200brianp * functions to initiate shutdown or restart without relying on signals.
6653a33e820463abd4f81915b7a1eba0f602e200brianp * Previously this was initiated in sig_term() and restart() signal handlers,
6653a33e820463abd4f81915b7a1eba0f602e200brianp * but we want to be able to start a shutdown/restart from other sources --
6653a33e820463abd4f81915b7a1eba0f602e200brianp * e.g. on Win32, from the service manager. Now the service manager can
6653a33e820463abd4f81915b7a1eba0f602e200brianp * call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
6653a33e820463abd4f81915b7a1eba0f602e200brianp * these functions can also be called by the child processes, since global
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick * variables are no longer used to pass on the required action to the parent.
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick *
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick * These should only be called from the parent process itself, since the
239f998fbee5ac5b114b965bb76e217cce0003edstoddard * parent process will use the shutdown_pending and restart_pending variables
3568de757bac0b47256647504c186d17ca272f85rbb * to determine whether to shutdown or restart. The child process should
3568de757bac0b47256647504c186d17ca272f85rbb * call signal_parent() directly to tell the parent to die -- this will
3568de757bac0b47256647504c186d17ca272f85rbb * cause neither of those variable to be set, which the parent will
12901074f5d6b36d08be84d8637b6f2c21e0da26trawick * assume means something serious is wrong (which it will be, for the
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard * child to force an exit) and so do an exit anyway.
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard */
3568de757bac0b47256647504c186d17ca272f85rbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic void ap_start_shutdown(void)
48d2edbfb84e5559b5da0f8d614ccab805cc67a8rbb{
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding if (shutdown_pending == 1) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard /* Um, is this _probably_ not an error, if the user has
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * tried to do a shutdown twice quickly, so we won't
f2e009134c7e279f99dfca5bd421f721bf1f7840jorton * worry about reporting it.
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding */
3568de757bac0b47256647504c186d17ca272f85rbb return;
3568de757bac0b47256647504c186d17ca272f85rbb }
3568de757bac0b47256647504c186d17ca272f85rbb shutdown_pending = 1;
3568de757bac0b47256647504c186d17ca272f85rbb}
3568de757bac0b47256647504c186d17ca272f85rbb
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard/* do a graceful restart if graceful == 1 */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddardstatic void ap_start_restart(int graceful)
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz{
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (restart_pending == 1) {
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem /* Probably not an error - don't bother reporting it */
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem return;
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem }
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem restart_pending = 1;
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem is_graceful = graceful;
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem if (is_graceful) {
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem apr_kill_cleanup(pconf, NULL, ap_cleanup_shared_mem);
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem }
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem}
83a5021aef5ebb67395b93f75df4fd0f0b4fc8c8fuankg
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddardstatic void sig_term(int sig)
9f979f5c8061f6f6f560d1824e0e378ff5b91931rpluem{
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_start_shutdown();
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard}
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddardstatic void restart(int sig)
f2e009134c7e279f99dfca5bd421f721bf1f7840jorton{
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#ifndef WIN32
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_start_restart(sig == SIGWINCH);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#else
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_start_restart(1);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#endif
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard}
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
3568de757bac0b47256647504c186d17ca272f85rbbstatic void set_signals(void)
3568de757bac0b47256647504c186d17ca272f85rbb{
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick#ifndef NO_USE_SIGACTION
7cd5419264796cfeaf8215383cf0f89130a81fectrawick struct sigaction sa;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick
7cd5419264796cfeaf8215383cf0f89130a81fectrawick sigemptyset(&sa.sa_mask);
7cd5419264796cfeaf8215383cf0f89130a81fectrawick sa.sa_flags = 0;
e8f95a682820a599fe41b22977010636be5c2717jim
98cd3186185bb28ae6c95a3f159899fcf56a663ftrawick if (!one_process) {
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick sa.sa_handler = sig_coredump;
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick#if defined(SA_ONESHOT)
3568de757bac0b47256647504c186d17ca272f85rbb sa.sa_flags = SA_ONESHOT;
a72ba68ecbbc61e4b513e50d6000245c33f753dcwrowe#elif defined(SA_RESETHAND)
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm sa.sa_flags = SA_RESETHAND;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (sigaction(SIGSEGV, &sa, NULL) < 0)
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)");
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm#ifdef SIGBUS
3cbd177a6c885562f9ad0cf11695f044489c881dgregames if (sigaction(SIGBUS, &sa, NULL) < 0)
dd028aa8111afb6534fece555e8c2d408894671etrawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)");
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif
3cbd177a6c885562f9ad0cf11695f044489c881dgregames#ifdef SIGABORT
3cbd177a6c885562f9ad0cf11695f044489c881dgregames if (sigaction(SIGABORT, &sa, NULL) < 0)
3cbd177a6c885562f9ad0cf11695f044489c881dgregames ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABORT)");
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif
5a0f707b48da7703cbe6bc087f13a6735b1c742dgregames#ifdef SIGABRT
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (sigaction(SIGABRT, &sa, NULL) < 0)
5a0f707b48da7703cbe6bc087f13a6735b1c742dgregames ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)");
5a0f707b48da7703cbe6bc087f13a6735b1c742dgregames#endif
5a0f707b48da7703cbe6bc087f13a6735b1c742dgregames#ifdef SIGILL
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (sigaction(SIGILL, &sa, NULL) < 0)
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)");
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm#endif
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz sa.sa_flags = 0;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard }
ad83978f20c7d1a4323059d9af122e56fcd353bdstoddard sa.sa_handler = sig_term;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick if (sigaction(SIGTERM, &sa, NULL) < 0)
7cd5419264796cfeaf8215383cf0f89130a81fectrawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#ifdef SIGINT
7cd5419264796cfeaf8215383cf0f89130a81fectrawick if (sigaction(SIGINT, &sa, NULL) < 0)
7cd5419264796cfeaf8215383cf0f89130a81fectrawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#endif
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#ifdef SIGXCPU
7cd5419264796cfeaf8215383cf0f89130a81fectrawick sa.sa_handler = SIG_DFL;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick if (sigaction(SIGXCPU, &sa, NULL) < 0)
7cd5419264796cfeaf8215383cf0f89130a81fectrawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)");
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#endif
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#ifdef SIGXFSZ
7cd5419264796cfeaf8215383cf0f89130a81fectrawick sa.sa_handler = SIG_DFL;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick if (sigaction(SIGXFSZ, &sa, NULL) < 0)
7cd5419264796cfeaf8215383cf0f89130a81fectrawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)");
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#endif
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#ifdef SIGPIPE
7cd5419264796cfeaf8215383cf0f89130a81fectrawick sa.sa_handler = SIG_IGN;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick if (sigaction(SIGPIPE, &sa, NULL) < 0)
7cd5419264796cfeaf8215383cf0f89130a81fectrawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#endif
7cd5419264796cfeaf8215383cf0f89130a81fectrawick
ad83978f20c7d1a4323059d9af122e56fcd353bdstoddard /* we want to ignore HUPs and WINCH while we're busy processing one */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz sigaddset(&sa.sa_mask, SIGHUP);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard sigaddset(&sa.sa_mask, SIGWINCH);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard sa.sa_handler = restart;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (sigaction(SIGHUP, &sa, NULL) < 0)
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (sigaction(SIGWINCH, &sa, NULL) < 0)
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGWINCH)");
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#else
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (!one_process) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_signal(SIGSEGV, sig_coredump);
3568de757bac0b47256647504c186d17ca272f85rbb#ifdef SIGBUS
7cd5419264796cfeaf8215383cf0f89130a81fectrawick apr_signal(SIGBUS, sig_coredump);
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#endif /* SIGBUS */
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#ifdef SIGABORT
7cd5419264796cfeaf8215383cf0f89130a81fectrawick apr_signal(SIGABORT, sig_coredump);
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#endif /* SIGABORT */
7cd5419264796cfeaf8215383cf0f89130a81fectrawick#ifdef SIGABRT
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm apr_signal(SIGABRT, sig_coredump);
3568de757bac0b47256647504c186d17ca272f85rbb#endif /* SIGABRT */
3568de757bac0b47256647504c186d17ca272f85rbb#ifdef SIGILL
74fd6d9aeadb9022086259c5c1ae00bc0dda9c9astoddard apr_signal(SIGILL, sig_coredump);
72b6f1cf3e616473e1c26464b3193b13c2c09e87brianp#endif /* SIGILL */
72b6f1cf3e616473e1c26464b3193b13c2c09e87brianp#ifdef SIGXCPU
3568de757bac0b47256647504c186d17ca272f85rbb apr_signal(SIGXCPU, SIG_DFL);
3568de757bac0b47256647504c186d17ca272f85rbb#endif /* SIGXCPU */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#ifdef SIGXFSZ
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_signal(SIGXFSZ, SIG_DFL);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif /* SIGXFSZ */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard }
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_signal(SIGTERM, sig_term);
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick#ifdef SIGHUP
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_signal(SIGHUP, restart);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif /* SIGHUP */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#ifdef SIGWINCH
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz apr_signal(SIGWINCH, restart);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#endif /* SIGWINCH */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#ifdef SIGPIPE
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz apr_signal(SIGPIPE, SIG_IGN);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#endif /* SIGPIPE */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz}
dd028aa8111afb6534fece555e8c2d408894671etrawick
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard/*****************************************************************
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard * Here follows a long bunch of generic server bookkeeping stuff...
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard */
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbbint ap_graceful_stop_signalled(void)
3568de757bac0b47256647504c186d17ca272f85rbb{
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard /* XXX - Does this really work? - Manoj */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz return is_graceful;
f714f1a7002928d785e53e70349700a7f595fee3trawick}
f714f1a7002928d785e53e70349700a7f595fee3trawick
3568de757bac0b47256647504c186d17ca272f85rbb/*****************************************************************
ad83978f20c7d1a4323059d9af122e56fcd353bdstoddard * Child process main loop.
4a13940dc2990df0a798718d3a3f9cf1566c2217bjh */
4a13940dc2990df0a798718d3a3f9cf1566c2217bjh
4a13940dc2990df0a798718d3a3f9cf1566c2217bjhstatic void process_socket(apr_pool_t *p, apr_socket_t *sock, long conn_id)
4a13940dc2990df0a798718d3a3f9cf1566c2217bjh{
3568de757bac0b47256647504c186d17ca272f85rbb conn_rec *current_conn;
3568de757bac0b47256647504c186d17ca272f85rbb int csd;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_status_t rv;
663237d6bcc59ac0997d71d48a1baa55fa29a3d8jim
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if ((rv = apr_get_os_sock(&csd, sock)) != APR_SUCCESS) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, "apr_get_os_sock");
3568de757bac0b47256647504c186d17ca272f85rbb }
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (csd >= FD_SETSIZE) {
663237d6bcc59ac0997d71d48a1baa55fa29a3d8jim ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, NULL,
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard "new file descriptor %d is too large; you probably need "
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard "to rebuild Apache with a larger FD_SETSIZE "
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard "(currently %d)",
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard csd, FD_SETSIZE);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz apr_close_socket(sock);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard return;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard }
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
3568de757bac0b47256647504c186d17ca272f85rbb ap_sock_disable_nagle(sock);
ad83978f20c7d1a4323059d9af122e56fcd353bdstoddard
4a13940dc2990df0a798718d3a3f9cf1566c2217bjh current_conn = ap_new_connection(p, ap_server_conf, sock, conn_id);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_process_connection(current_conn);
3568de757bac0b47256647504c186d17ca272f85rbb ap_lingering_close(current_conn);
4a13940dc2990df0a798718d3a3f9cf1566c2217bjh}
4a13940dc2990df0a798718d3a3f9cf1566c2217bjh
4a13940dc2990df0a798718d3a3f9cf1566c2217bjhstatic void *worker_thread(void *);
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb/* Starts a thread as long as we're below max_threads */
663237d6bcc59ac0997d71d48a1baa55fa29a3d8jimstatic int start_thread(void)
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard{
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard pthread_t thread;
3568de757bac0b47256647504c186d17ca272f85rbb int rc;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard pthread_mutex_lock(&worker_thread_count_mutex);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (worker_thread_count < max_threads) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if ((rc = pthread_create(&thread, &worker_thread_attr, worker_thread,
3568de757bac0b47256647504c186d17ca272f85rbb &worker_thread_free_ids[worker_thread_count]))) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#ifdef PTHREAD_SETS_ERRNO
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz rc = errno;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard#endif
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ap_log_error(APLOG_MARK, APLOG_ALERT, rc, ap_server_conf,
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard "pthread_create: unable to create worker thread");
3568de757bac0b47256647504c186d17ca272f85rbb /* In case system resources are maxxed out, we don't want
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard Apache running away with the CPU trying to fork over and
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz over and over again if we exit. */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz sleep(10);
3568de757bac0b47256647504c186d17ca272f85rbb workers_may_exit = 1;
3568de757bac0b47256647504c186d17ca272f85rbb pthread_mutex_unlock(&worker_thread_count_mutex);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz return 0;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz }
3568de757bac0b47256647504c186d17ca272f85rbb else {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard worker_thread_count++;
3568de757bac0b47256647504c186d17ca272f85rbb }
3568de757bac0b47256647504c186d17ca272f85rbb }
3568de757bac0b47256647504c186d17ca272f85rbb else {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard static int reported = 0;
3568de757bac0b47256647504c186d17ca272f85rbb
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (!reported) {
3568de757bac0b47256647504c186d17ca272f85rbb ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, ap_server_conf,
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick "server reached MaxThreadsPerChild setting, consider raising the"
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick " MaxThreadsPerChild or NumServers settings");
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick reported = 1;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard }
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz pthread_mutex_unlock(&worker_thread_count_mutex);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz return 0;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard }
beb70d51e435dc36c56a72b6cd83556c04db9283wrowe pthread_mutex_unlock(&worker_thread_count_mutex);
fe6baec9bbcd36f932b71a355120cd7b5a685d6cfielding return 1;
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb}
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard/* Sets workers_may_exit if we received a character on the pipe_of_death */
3568de757bac0b47256647504c186d17ca272f85rbbstatic void check_pipe_of_death(void)
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard{
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard pthread_mutex_lock(&pipe_of_death_mutex);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (!workers_may_exit) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard int ret;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard char pipe_read_char;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_size_t n = 1;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard ret = apr_recv(listenfds[0], &pipe_read_char, &n);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard if (APR_STATUS_IS_EAGAIN(ret)) {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard /* It lost the lottery. It must continue to suffer
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard * through a life of servitude. */
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe }
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard else {
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard /* It won the lottery (or something else is very
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard * wrong). Embrace death with open arms. */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard workers_may_exit = 1;
8e9734d1a4af74c141e2a0f880bb51bb061fa03atrawick }
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard }
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard pthread_mutex_unlock(&pipe_of_death_mutex);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard}
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick/* idle_thread_count should be incremented before starting a worker_thread */
3568de757bac0b47256647504c186d17ca272f85rbb
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddardstatic void *worker_thread(void *arg)
cb97ae2ff6969c2789b8e03f1bc4187fa73b6bafwrowe{
0f113d7123e8bd3e3e2e9b6373461a1a773bfccatrawick apr_socket_t *csd = NULL;
0f113d7123e8bd3e3e2e9b6373461a1a773bfccatrawick apr_pool_t *tpool; /* Pool for this thread */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz apr_pool_t *ptrans; /* Pool for per-transaction stuff */
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_socket_t *sd = NULL;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard int srv;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard int curr_pollfd, last_pollfd = 0;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard int thread_just_started = 1;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard int thread_num = *((int *) arg);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard long conn_id = child_num * HARD_THREAD_LIMIT + thread_num;
3568de757bac0b47256647504c186d17ca272f85rbb apr_pollfd_t *pollset;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard int n;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz apr_status_t rv;
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard pthread_mutex_lock(&thread_pool_parent_mutex);
c0659e61002e9d6ff77b2dca72540e0af1b2ca64stoddard apr_create_pool(&tpool, thread_pool_parent);
3568de757bac0b47256647504c186d17ca272f85rbb pthread_mutex_unlock(&thread_pool_parent_mutex);
3568de757bac0b47256647504c186d17ca272f85rbb apr_create_pool(&ptrans, tpool);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick apr_setup_poll(&pollset, num_listenfds+1, tpool);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick for(n=0 ; n <= num_listenfds ; ++n)
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick apr_add_poll_socket(pollset, listenfds[n], APR_POLLIN);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick while (1) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick workers_may_exit |= (max_requests_per_child != 0) && (requests_this_child <= 0);
f886987cd0bd4220c14043c4d9be77ec22902e73trawick if (workers_may_exit) break;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (!thread_just_started) {
f886987cd0bd4220c14043c4d9be77ec22902e73trawick pthread_mutex_lock(&idle_thread_count_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (idle_thread_count < max_spare_threads) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick idle_thread_count++;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_unlock(&idle_thread_count_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz else {
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz pthread_mutex_unlock(&idle_thread_count_mutex);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz break;
a72ba68ecbbc61e4b513e50d6000245c33f753dcwrowe }
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick }
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm else {
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm thread_just_started = 0;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm }
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick if ((rv = SAFE_ACCEPT(apr_lock(accept_mutex)))
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick != APR_SUCCESS) {
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm "apr_lock failed. Attempting to shutdown "
3568de757bac0b47256647504c186d17ca272f85rbb "process gracefully.");
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm workers_may_exit = 1;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz }
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz while (!workers_may_exit) {
e8f95a682820a599fe41b22977010636be5c2717jim apr_int16_t event;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm srv = apr_poll(pollset, &n, -1);
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (srv != APR_SUCCESS) {
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (APR_STATUS_IS_EINTR(srv)) {
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm continue;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm }
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm /* apr_poll() will only return errors in catastrophic
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm * circumstances. Let's try exiting gracefully, for now. */
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm ap_log_error(APLOG_MARK, APLOG_ERR, srv, (const server_rec *)
36c8049de63c446926139936c3d195330a0539cetrawick ap_server_conf, "apr_poll: (listen)");
36c8049de63c446926139936c3d195330a0539cetrawick workers_may_exit = 1;
36c8049de63c446926139936c3d195330a0539cetrawick }
36c8049de63c446926139936c3d195330a0539cetrawick if (workers_may_exit) break;
36c8049de63c446926139936c3d195330a0539cetrawick
36c8049de63c446926139936c3d195330a0539cetrawick apr_get_revents(&event, listenfds[0], pollset);
36c8049de63c446926139936c3d195330a0539cetrawick if (event & APR_POLLIN) {
36c8049de63c446926139936c3d195330a0539cetrawick /* A process got a signal on the shutdown pipe. Check if we're
e8f95a682820a599fe41b22977010636be5c2717jim * the lucky process to die. */
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick check_pipe_of_death();
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm continue;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
36c8049de63c446926139936c3d195330a0539cetrawick if (num_listenfds == 1) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick sd = ap_listeners->sd;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick goto got_fd;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick else {
cb97ae2ff6969c2789b8e03f1bc4187fa73b6bafwrowe /* find a listener */
36c8049de63c446926139936c3d195330a0539cetrawick curr_pollfd = last_pollfd;
36c8049de63c446926139936c3d195330a0539cetrawick do {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick curr_pollfd++;
e8f95a682820a599fe41b22977010636be5c2717jim if (curr_pollfd > num_listenfds) {
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm curr_pollfd = 1;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /* XXX: Should we check for POLLERR? */
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick apr_get_revents(&event, listenfds[curr_pollfd], pollset);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (event & APR_POLLIN) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick last_pollfd = curr_pollfd;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick sd = listenfds[curr_pollfd];
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick goto got_fd;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick } while (curr_pollfd != last_pollfd);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick got_fd:
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (!workers_may_exit) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if ((rv = apr_accept(&csd, sd, ptrans)) != APR_SUCCESS) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick csd = NULL;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, "apr_accept");
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if ((rv = SAFE_ACCEPT(apr_unlock(accept_mutex)))
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick != APR_SUCCESS) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick "apr_unlock failed. Attempting to shutdown "
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick "process gracefully.");
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick workers_may_exit = 1;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_lock(&idle_thread_count_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (idle_thread_count > min_spare_threads) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick idle_thread_count--;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick else {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (!start_thread()) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick idle_thread_count--;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_unlock(&idle_thread_count_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (csd != NULL) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick process_socket(ptrans, csd, conn_id);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick requests_this_child--;
e8f95a682820a599fe41b22977010636be5c2717jim }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick } else {
f886987cd0bd4220c14043c4d9be77ec22902e73trawick if ((rv = SAFE_ACCEPT(apr_unlock(accept_mutex)))
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick != APR_SUCCESS) {
f886987cd0bd4220c14043c4d9be77ec22902e73trawick ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick "apr_unlock failed. Attempting to shutdown "
f886987cd0bd4220c14043c4d9be77ec22902e73trawick "process gracefully.");
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm workers_may_exit = 1;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm }
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm pthread_mutex_lock(&idle_thread_count_mutex);
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm idle_thread_count--;
3568de757bac0b47256647504c186d17ca272f85rbb pthread_mutex_unlock(&idle_thread_count_mutex);
72b6f1cf3e616473e1c26464b3193b13c2c09e87brianp break;
72b6f1cf3e616473e1c26464b3193b13c2c09e87brianp }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick apr_clear_pool(ptrans);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_lock(&thread_pool_parent_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick apr_destroy_pool(tpool);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_unlock(&thread_pool_parent_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_lock(&worker_thread_count_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick worker_thread_count--;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick worker_thread_free_ids[worker_thread_count] = thread_num;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (worker_thread_count == 0) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /* All the threads have exited, now finish the shutdown process
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm * by signalling the sigwait thread */
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick kill(my_pid, SIGTERM);
f2e009134c7e279f99dfca5bd421f721bf1f7840jorton }
f2e009134c7e279f99dfca5bd421f721bf1f7840jorton pthread_mutex_unlock(&worker_thread_count_mutex);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm return NULL;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick}
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
64c351fd973428b5bb4c28e983fa86875ea4e60fdougmstatic void child_main(int child_num_arg)
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick{
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick sigset_t sig_mask;
36c8049de63c446926139936c3d195330a0539cetrawick int signal_received;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick int i;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_listen_rec *lr;
f886987cd0bd4220c14043c4d9be77ec22902e73trawick apr_status_t rv;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
cb97ae2ff6969c2789b8e03f1bc4187fa73b6bafwrowe my_pid = getpid();
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick child_num = child_num_arg;
36c8049de63c446926139936c3d195330a0539cetrawick apr_create_pool(&pchild, pconf);
36c8049de63c446926139936c3d195330a0539cetrawick
36c8049de63c446926139936c3d195330a0539cetrawick /*stuff to do before we switch id's, so we have permissions.*/
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
e8f95a682820a599fe41b22977010636be5c2717jim rv = SAFE_ACCEPT(apr_child_init_lock(&accept_mutex, lock_fname,
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm pchild));
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (rv != APR_SUCCESS) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick "Couldn't initialize cross-process lock in child");
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick clean_child_exit(APEXIT_CHILDFATAL);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (unixd_setup_child()) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick clean_child_exit(APEXIT_CHILDFATAL);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_child_init_hook(pchild, ap_server_conf);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /*done with init critical section */
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /* All threads should mask signals out, accoring to sigwait(2) man page */
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick sigfillset(&sig_mask);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick#ifdef SIGPROCMASK_SETS_THREAD_MASK
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (sigprocmask(SIG_SETMASK, &sig_mask, NULL) != 0) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, "sigprocmask");
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick#else
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if ((rv = pthread_sigmask(SIG_SETMASK, &sig_mask, NULL)) != 0) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick#ifdef PTHREAD_SETS_ERRNO
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick rv = errno;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick#endif
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick "pthread_sigmask");
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick }
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick#endif
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick requests_this_child = max_requests_per_child;
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /* Set up the pollfd array */
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick listenfds = apr_pcalloc(pchild, sizeof(*listenfds) * (num_listenfds + 1));
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick#if APR_FILES_AS_SOCKETS
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick apr_socket_from_file(&listenfds[0], pipe_of_death_in);
e8f95a682820a599fe41b22977010636be5c2717jim#endif
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick for (lr = ap_listeners, i = 1; i <= num_listenfds; lr = lr->next, ++i)
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick listenfds[i]=lr->sd;
f886987cd0bd4220c14043c4d9be77ec22902e73trawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /* Setup worker threads */
f886987cd0bd4220c14043c4d9be77ec22902e73trawick
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick if (threads_to_start > max_threads) {
f886987cd0bd4220c14043c4d9be77ec22902e73trawick threads_to_start = max_threads;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm }
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm idle_thread_count = threads_to_start;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm worker_thread_count = 0;
64c351fd973428b5bb4c28e983fa86875ea4e60fdougm for (i = 0; i < max_threads; i++) {
3568de757bac0b47256647504c186d17ca272f85rbb worker_thread_free_ids[i] = i;
72b6f1cf3e616473e1c26464b3193b13c2c09e87brianp }
72b6f1cf3e616473e1c26464b3193b13c2c09e87brianp apr_create_pool(&thread_pool_parent, pchild);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_init(&thread_pool_parent_mutex, NULL);
e8f95a682820a599fe41b22977010636be5c2717jim pthread_mutex_init(&idle_thread_count_mutex, NULL);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_init(&worker_thread_count_mutex, NULL);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_mutex_init(&pipe_of_death_mutex, NULL);
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick pthread_attr_init(&worker_thread_attr);
e8f95a682820a599fe41b22977010636be5c2717jim#ifdef PTHREAD_ATTR_SETDETACHSTATE_ARG2_ADDR
44d2e75323651320b480d8bc2f098448a08de4fcwrowe {
44d2e75323651320b480d8bc2f098448a08de4fcwrowe int on = 1;
44d2e75323651320b480d8bc2f098448a08de4fcwrowe
44d2e75323651320b480d8bc2f098448a08de4fcwrowe pthread_attr_setdetachstate(&worker_thread_attr, &on);
44d2e75323651320b480d8bc2f098448a08de4fcwrowe }
44d2e75323651320b480d8bc2f098448a08de4fcwrowe#else
44d2e75323651320b480d8bc2f098448a08de4fcwrowe pthread_attr_setdetachstate(&worker_thread_attr, PTHREAD_CREATE_DETACHED);
44d2e75323651320b480d8bc2f098448a08de4fcwrowe#endif
44d2e75323651320b480d8bc2f098448a08de4fcwrowe
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick /* We are creating worker threads right now */
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick for (i=0; i < threads_to_start; i++) {
2e7f1d7da527c09e717251e186deffe55e6fbd0ftrawick /* start_thread shouldn't fail here */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (!start_thread()) {
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick break;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz }
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe }
3568de757bac0b47256647504c186d17ca272f85rbb
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe /* This thread will be the one responsible for handling signals */
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe sigemptyset(&sig_mask);
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe sigaddset(&sig_mask, SIGTERM);
f886987cd0bd4220c14043c4d9be77ec22902e73trawick sigaddset(&sig_mask, SIGINT);
f886987cd0bd4220c14043c4d9be77ec22902e73trawick ap_sigwait(&sig_mask, &signal_received);
f886987cd0bd4220c14043c4d9be77ec22902e73trawick switch (signal_received) {
f886987cd0bd4220c14043c4d9be77ec22902e73trawick case SIGTERM:
f886987cd0bd4220c14043c4d9be77ec22902e73trawick case SIGINT:
f886987cd0bd4220c14043c4d9be77ec22902e73trawick just_die(signal_received);
f886987cd0bd4220c14043c4d9be77ec22902e73trawick break;
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe default:
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe "received impossible signal: %d", signal_received);
1ec8bd0373f11c07688ec9afbbf778cf78a0bc52wrowe just_die(SIGTERM);
3568de757bac0b47256647504c186d17ca272f85rbb }
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz}
8bfe865d8d61be4ba4a89e45427a3c4211ebabdctrawick
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic int make_child(server_rec *s, int slot, time_t now)
3568de757bac0b47256647504c186d17ca272f85rbb{
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz int pid;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz if (slot + 1 > ap_max_daemons_limit) {
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz ap_max_daemons_limit = slot + 1;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz }
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb if (one_process) {
98fb535f829e2a95aabd82420931f476661fa8e3jorton set_signals();
98fb535f829e2a95aabd82420931f476661fa8e3jorton ap_child_table[slot].pid = getpid();
e8f95a682820a599fe41b22977010636be5c2717jim ap_child_table[slot].status = SERVER_ALIVE;
e8f95a682820a599fe41b22977010636be5c2717jim child_main(slot);
98fb535f829e2a95aabd82420931f476661fa8e3jorton }
98fb535f829e2a95aabd82420931f476661fa8e3jorton
e8f95a682820a599fe41b22977010636be5c2717jim if ((pid = fork()) == -1) {
98fb535f829e2a95aabd82420931f476661fa8e3jorton ap_log_error(APLOG_MARK, APLOG_ERR, errno, s,
98fb535f829e2a95aabd82420931f476661fa8e3jorton "fork: Unable to fork new process");
98fb535f829e2a95aabd82420931f476661fa8e3jorton /* In case system resources are maxxed out, we don't want
3568de757bac0b47256647504c186d17ca272f85rbb Apache running away with the CPU trying to fork over and
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz over and over again. */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz sleep(10);
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb return -1;
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding }
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding if (!pid) {
85c5af648e9f414bd4f157490766d2fd5515a9f5rpluem#ifdef AIX_BIND_PROCESSOR
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe /* By default, AIX binds to a single processor. This bit unbinds
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe children which will then bind to another CPU.
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe */
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe#include <sys/processor.h>
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe int status = bindprocessor(BINDPROCESS, (int)getpid(),
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe PROCESSOR_CLASS_ANY);
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe if (status != OK)
85c5af648e9f414bd4f157490766d2fd5515a9f5rpluem ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno,
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe ap_server_conf, "processor unbind failed %d", status);
3568de757bac0b47256647504c186d17ca272f85rbb#endif
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz RAISE_SIGSTOP(MAKE_CHILD);
3568de757bac0b47256647504c186d17ca272f85rbb
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz /* XXX - For an unthreaded server, a signal handler will be necessary
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz apr_signal(SIGTERM, just_die);
3568de757bac0b47256647504c186d17ca272f85rbb */
3568de757bac0b47256647504c186d17ca272f85rbb child_main(slot);
3568de757bac0b47256647504c186d17ca272f85rbb
3568de757bac0b47256647504c186d17ca272f85rbb return 0;
3568de757bac0b47256647504c186d17ca272f85rbb }
3568de757bac0b47256647504c186d17ca272f85rbb /* else */
ec020ca384efb30d501a5af796ddc3bb237d7b8fgregames ap_child_table[slot].pid = pid;
3568de757bac0b47256647504c186d17ca272f85rbb ap_child_table[slot].status = SERVER_ALIVE;
ce03576b2434cec77f2921db9d5b6a0510581c23rederpj
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick return 0;
cd8f8c995d415473f3bfb0b329b2450f2a722c3atrawick}
9d0665da83d1e22c0ea0e5f6f940f70f75bf5237ianh
3568de757bac0b47256647504c186d17ca272f85rbb/* start up a bunch of children */
3568de757bac0b47256647504c186d17ca272f85rbbstatic int startup_children(int number_to_start)
7cd5419264796cfeaf8215383cf0f89130a81fectrawick{
7cd5419264796cfeaf8215383cf0f89130a81fectrawick int i;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick
7cd5419264796cfeaf8215383cf0f89130a81fectrawick for (i = 0; number_to_start && i < num_daemons; ++i) {
7cd5419264796cfeaf8215383cf0f89130a81fectrawick if (ap_child_table[i].pid) {
7cd5419264796cfeaf8215383cf0f89130a81fectrawick continue;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick }
73e8b26287de5c06fa470d36162e103dbac9c7e5wrowe if (make_child(ap_server_conf, i, 0) < 0) {
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding break;
b980ad7fdc218b4855cde9f75a747527f50c554dwrowe }
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe --number_to_start;
3568de757bac0b47256647504c186d17ca272f85rbb }
7cd5419264796cfeaf8215383cf0f89130a81fectrawick return number_to_start;
7cd5419264796cfeaf8215383cf0f89130a81fectrawick}
7cd5419264796cfeaf8215383cf0f89130a81fectrawick
ca53a74f4012a45cbad48e940eddf27d866981f9dougm
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding/*
3d96ee83babeec32482c9082c9426340cee8c44dwrowe * spawn_rate is the number of children that will be spawned on the
0f081398cf0eef8cc7c66a535d450110a92dc8aefielding * next maintenance cycle if there aren't enough servers. It is
302dc1f7b3feee23a91ad8f3cf3cb2edd95a557bmanoj * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz * without the need to spawn.
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz */
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantzstatic int spawn_rate = 1;
28c170ac8e99644de58cad454c6e0f9b4b359be6jerenkrantz#ifndef MAX_SPAWN_RATE
0cb6873985efbf0cc9644114925df6baa4b32d5awrowe#define MAX_SPAWN_RATE (32)
3568de757bac0b47256647504c186d17ca272f85rbb#endif
0f081398cf0eef8cc7c66a535d450110a92dc8aefieldingstatic int hold_off_on_exponential_spawning;
3568de757bac0b47256647504c186d17ca272f85rbb
static void perform_child_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 < num_daemons; ++i) {
if (ap_child_table[i].pid == 0) {
if (free_length < spawn_rate) {
free_slots[free_length] = i;
++free_length;
}
}
else {
last_non_dead = i;
}
if (i >= ap_max_daemons_limit && free_length >= 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 (spawn_rate < MAX_SPAWN_RATE) {
spawn_rate *= 2;
}
}
else {
spawn_rate = 1;
}
}
static void server_main_loop(int remaining_children_to_start)
{
int child_slot;
apr_wait_t status;
apr_proc_t pid;
int i;
while (!restart_pending && !shutdown_pending) {
ap_wait_or_timeout(&status, &pid, pconf);
if (pid.pid != -1) {
ap_process_child_status(&pid, status);
/* 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].pid = 0;
if (remaining_children_to_start
&& child_slot < num_daemons) {
/* 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;
}
#if APR_HAS_OTHER_CHILD
}
else if (apr_reap_other_child(&pid, status) == 0) {
/* handled */
#endif
}
else if (is_graceful) {
/* Great, we've probably just lost a slot in the
* child table. 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.
*/
remaining_children_to_start = \
startup_children(remaining_children_to_start);
/* 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_child_maintenance();
}
}
int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
{
int remaining_children_to_start;
int i;
apr_status_t rv;
apr_size_t one = 1;
pconf = _pconf;
ap_server_conf = s;
if ((rv = apr_create_pipe(&pipe_of_death_in, &pipe_of_death_out, pconf))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv,
(const server_rec*) ap_server_conf,
"apr_create_pipe (pipe_of_death)");
exit(1);
}
if ((rv = apr_set_pipe_timeout(pipe_of_death_in, 0)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv,
(const server_rec*) ap_server_conf,
"apr_set_pipe_timeout (pipe_of_death)");
exit(1);
}
ap_server_conf = s;
if ((num_listenfds = 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.%u",
ap_server_root_relative(_pconf, lock_fname),
my_pid);
rv = SAFE_ACCEPT(apr_create_lock(&accept_mutex, APR_MUTEX,
APR_LOCKALL, 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);
}
/* Initialize the child table */
if (!is_graceful) {
for (i = 0; i < HARD_SERVER_LIMIT; i++) {
ap_child_table[i].pid = 0;
}
}
set_signals();
/* 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 = num_daemons;
if (!is_graceful) {
remaining_children_to_start = \
startup_children(remaining_children_to_start);
}
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 */
apr_signal(SIGHUP, SIG_IGN);
if (one_process) {
/* not worth thinking about */
return 1;
}
if (is_graceful) {
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.
*/
for (i = 0; i < num_daemons; ++i) {
if (ap_child_table[i].pid) {
ap_child_table[i].status = SERVER_DYING;
}
}
/* give the children the signal to die */
for (i = 0; i < num_daemons;) {
if ((rv = apr_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++;
}
}
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 dexter_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
{
static int restart_num = 0;
int no_detach = 0;
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_detach();
}
my_pid = getpid();
}
unixd_pre_config(ptemp);
ap_listen_pre_config();
num_daemons = DEFAULT_NUM_DAEMON;
threads_to_start = DEFAULT_START_THREAD;
min_spare_threads = DEFAULT_MIN_SPARE_THREAD;
max_spare_threads = DEFAULT_MAX_SPARE_THREAD;
max_threads = HARD_THREAD_LIMIT;
ap_pid_fname = DEFAULT_PIDLOG;
ap_scoreboard_fname = DEFAULT_SCOREBOARD;
lock_fname = DEFAULT_LOCKFILE;
max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
ap_dexter_set_maintain_connection_status(1);
apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
}
static void dexter_hooks(apr_pool_t *p)
{
INIT_SIGLIST()
one_process = 0;
ap_hook_pre_config(dexter_pre_config, NULL, NULL, APR_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_num_daemons (cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
num_daemons = atoi(arg);
if (num_daemons > HARD_SERVER_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: NumServers of %d exceeds compile time limit "
"of %d servers,", num_daemons, HARD_SERVER_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" lowering NumServers 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);
num_daemons = HARD_SERVER_LIMIT;
}
else if (num_daemons < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: Require NumServers > 0, setting to 1");
num_daemons = 1;
}
return NULL;
}
static const char *set_threads_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;
}
threads_to_start = atoi(arg);
if (threads_to_start > HARD_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: StartThreads of %d exceeds compile time"
" limit of %d threads,", threads_to_start,
HARD_THREAD_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" lowering StartThreads 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 (threads_to_start < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: Require StartThreads > 0, setting to 1");
threads_to_start = 1;
}
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);
if (max_spare_threads >= HARD_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: detected MinSpareThreads set higher than");
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"HARD_THREAD_LIMIT. Resetting to %d", HARD_THREAD_LIMIT);
max_spare_threads = HARD_THREAD_LIMIT;
}
return NULL;
}
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;
}
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;
}
max_requests_per_child = atoi(arg);
return NULL;
}
static const char *set_maintain_connection_status(cmd_parms *cmd,
void *dummy, int arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_dexter_set_maintain_connection_status(arg != 0);
return NULL;
}
static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, const char *arg)
{
apr_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 ((apr_stat(&finfo, fname, APR_FINFO_NORM, cmd->pool) != APR_SUCCESS)
|| (finfo.filetype != APR_DIR)) {
return apr_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
" does not exist or is not a directory", NULL);
}
apr_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
return NULL;
}
static const command_rec dexter_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("NumServers", set_num_daemons, NULL, RSRC_CONF,
"Number of children alive at the same time"),
AP_INIT_TAKE1("StartThreads", set_threads_to_start, NULL, RSRC_CONF,
"Number of threads each child creates"),
AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
"Minimum number of idle threads per child, to handle request spikes"),
AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
"Maximum number of idle threads per child"),
AP_INIT_TAKE1("MaxThreadsPerChild", set_max_threads, NULL, RSRC_CONF,
"Maximum number of threads per child"),
AP_INIT_TAKE1("MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF,
"Maximum number of requests a particular child serves before dying."),
AP_INIT_FLAG("ConnectionStatus", set_maintain_connection_status, NULL, RSRC_CONF,
"Whether or not to maintain status information on current connections"),
AP_INIT_TAKE1("CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF,
"The location of the directory Apache changes to before dumping core"),
{ NULL }
};
module AP_MODULE_DECLARE_DATA mpm_dexter_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 */
dexter_cmds, /* command apr_table_t */
dexter_hooks /* register_hooks */
};