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APR functions (grumble). This is needed for apr_stat, which will be in the suexec path coming up. git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86710 13f79535-47bb-0310-9956-ffa450edef68
1423 lines
46 KiB
C
1423 lines
46 KiB
C
/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2000 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" must
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* not be used to endorse or promote products derived from this
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* software without prior written permission. For written
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* permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* nor may "Apache" appear in their name, without prior written
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* permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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* Portions of this software are based upon public domain software
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* originally written at the National Center for Supercomputing Applications,
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* University of Illinois, Urbana-Champaign.
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*/
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#define CORE_PRIVATE
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#include "apr_portable.h"
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#include "apr_strings.h"
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#include "apr_file_io.h"
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#include "apr_thread_proc.h"
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#include "ap_config.h"
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#include "httpd.h"
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#include "http_main.h"
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#include "http_log.h"
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#include "http_config.h" /* for read_config */
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#include "http_core.h" /* for get_remote_host */
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#include "http_connection.h"
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#include "ap_mpm.h"
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#include "unixd.h"
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#include "mpm_common.h"
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#include "ap_listen.h"
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#include "scoreboard.h"
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#ifdef HAVE_NETINET_TCP_H
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#include <netinet/tcp.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#include <pthread.h>
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#include <signal.h>
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/*
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* Actual definitions of config globals
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*/
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int ap_threads_per_child=0; /* Worker threads per child */
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int ap_max_requests_per_child=0;
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static const char *ap_pid_fname=NULL;
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AP_DECLARE_DATA const char *ap_scoreboard_fname=NULL;
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static int ap_daemons_to_start=0;
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static int min_spare_threads=0;
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static int max_spare_threads=0;
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static int ap_daemons_limit=0;
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static time_t ap_restart_time=0;
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AP_DECLARE_DATA int ap_extended_status = 0;
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static int workers_may_exit = 0;
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static int requests_this_child;
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static int num_listensocks = 0;
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static apr_socket_t **listensocks;
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/* The structure used to pass unique initialization info to each thread */
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typedef struct {
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int pid;
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int tid;
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int sd;
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apr_pool_t *tpool; /* "pthread" would be confusing */
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} proc_info;
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/*
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* The max child slot ever assigned, preserved across restarts. Necessary
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* to deal with MaxClients changes across SIGWINCH restarts. We use this
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* value to optimize routines that have to scan the entire scoreboard.
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*/
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int ap_max_daemons_limit = -1;
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char ap_coredump_dir[MAX_STRING_LEN];
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static apr_file_t *pipe_of_death_in = NULL;
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static apr_file_t *pipe_of_death_out = NULL;
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static pthread_mutex_t pipe_of_death_mutex;
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/* *Non*-shared http_main globals... */
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server_rec *ap_server_conf;
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/* one_process --- debugging mode variable; can be set from the command line
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* with the -X flag. If set, this gets you the child_main loop running
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* in the process which originally started up (no detach, no make_child),
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* which is a pretty nice debugging environment. (You'll get a SIGHUP
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* early in standalone_main; just continue through. This is the server
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* trying to kill off any child processes which it might have lying
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* around --- Apache doesn't keep track of their pids, it just sends
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* SIGHUP to the process group, ignoring it in the root process.
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* Continue through and you'll be fine.).
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*/
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static int one_process = 0;
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#ifdef DEBUG_SIGSTOP
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int raise_sigstop_flags;
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#endif
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static apr_pool_t *pconf; /* Pool for config stuff */
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static apr_pool_t *pchild; /* Pool for httpd child stuff */
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unsigned int ap_my_pid; /* Linux getpid() doesn't work except in main
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thread. Use this instead */
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/* Keep track of the number of worker threads currently active */
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static int worker_thread_count;
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static pthread_mutex_t worker_thread_count_mutex;
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/* Locks for accept serialization */
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static pthread_mutex_t thread_accept_mutex = PTHREAD_MUTEX_INITIALIZER;
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static apr_lock_t *process_accept_mutex;
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static const char *lock_fname;
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#ifdef NO_SERIALIZED_ACCEPT
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#define SAFE_ACCEPT(stmt) APR_SUCCESS
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#else
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#define SAFE_ACCEPT(stmt) (stmt)
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#endif
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AP_DECLARE(int) ap_get_max_daemons(void)
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{
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return ap_max_daemons_limit;
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}
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/* a clean exit from a child with proper cleanup */
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static void clean_child_exit(int code) __attribute__ ((noreturn));
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void clean_child_exit(int code)
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{
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if (pchild) {
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apr_destroy_pool(pchild);
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}
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exit(code);
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}
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/* handle all varieties of core dumping signals */
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static void sig_coredump(int sig)
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{
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chdir(ap_coredump_dir);
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apr_signal(sig, SIG_DFL);
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kill(ap_my_pid, sig);
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/* At this point we've got sig blocked, because we're still inside
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* the signal handler. When we leave the signal handler it will
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* be unblocked, and we'll take the signal... and coredump or whatever
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* is appropriate for this particular Unix. In addition the parent
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* will see the real signal we received -- whereas if we called
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* abort() here, the parent would only see SIGABRT.
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*/
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}
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static void just_die(int sig)
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{
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clean_child_exit(0);
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}
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/*****************************************************************
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* Connection structures and accounting...
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*/
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/* volatile just in case */
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static int volatile shutdown_pending;
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static int volatile restart_pending;
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static int volatile is_graceful;
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ap_generation_t volatile ap_my_generation;
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/*
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* ap_start_shutdown() and ap_start_restart(), below, are a first stab at
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* functions to initiate shutdown or restart without relying on signals.
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* Previously this was initiated in sig_term() and restart() signal handlers,
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* but we want to be able to start a shutdown/restart from other sources --
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* e.g. on Win32, from the service manager. Now the service manager can
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* call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
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* these functions can also be called by the child processes, since global
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* variables are no longer used to pass on the required action to the parent.
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*
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* These should only be called from the parent process itself, since the
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* parent process will use the shutdown_pending and restart_pending variables
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* to determine whether to shutdown or restart. The child process should
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* call signal_parent() directly to tell the parent to die -- this will
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* cause neither of those variable to be set, which the parent will
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* assume means something serious is wrong (which it will be, for the
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* child to force an exit) and so do an exit anyway.
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*/
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void ap_start_shutdown(void)
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{
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if (shutdown_pending == 1) {
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/* Um, is this _probably_ not an error, if the user has
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* tried to do a shutdown twice quickly, so we won't
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* worry about reporting it.
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*/
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return;
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}
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shutdown_pending = 1;
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}
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/* do a graceful restart if graceful == 1 */
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static void ap_start_restart(int graceful)
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{
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if (restart_pending == 1) {
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/* Probably not an error - don't bother reporting it */
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return;
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}
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restart_pending = 1;
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is_graceful = graceful;
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if (is_graceful) {
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apr_kill_cleanup(pconf, NULL, ap_cleanup_shared_mem);
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}
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}
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static void sig_term(int sig)
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{
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ap_start_shutdown();
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}
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static void restart(int sig)
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{
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#ifndef WIN32
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ap_start_restart(sig == SIGWINCH);
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#else
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ap_start_restart(1);
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#endif
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}
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static void set_signals(void)
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{
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#ifndef NO_USE_SIGACTION
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struct sigaction sa;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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if (!one_process) {
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sa.sa_handler = sig_coredump;
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#if defined(SA_ONESHOT)
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sa.sa_flags = SA_ONESHOT;
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#elif defined(SA_RESETHAND)
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sa.sa_flags = SA_RESETHAND;
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#endif
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if (sigaction(SIGSEGV, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)");
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#ifdef SIGBUS
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if (sigaction(SIGBUS, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)");
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#endif
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#ifdef SIGABORT
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if (sigaction(SIGABORT, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABORT)");
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#endif
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#ifdef SIGABRT
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if (sigaction(SIGABRT, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)");
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#endif
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#ifdef SIGILL
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if (sigaction(SIGILL, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)");
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#endif
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sa.sa_flags = 0;
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}
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sa.sa_handler = sig_term;
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if (sigaction(SIGTERM, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
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#ifdef SIGINT
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if (sigaction(SIGINT, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
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#endif
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#ifdef SIGXCPU
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sa.sa_handler = SIG_DFL;
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if (sigaction(SIGXCPU, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)");
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#endif
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#ifdef SIGXFSZ
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sa.sa_handler = SIG_DFL;
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if (sigaction(SIGXFSZ, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)");
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#endif
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#ifdef SIGPIPE
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sa.sa_handler = SIG_IGN;
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if (sigaction(SIGPIPE, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
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#endif
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/* we want to ignore HUPs and WINCH while we're busy processing one */
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sigaddset(&sa.sa_mask, SIGHUP);
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sigaddset(&sa.sa_mask, SIGWINCH);
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sa.sa_handler = restart;
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if (sigaction(SIGHUP, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
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if (sigaction(SIGWINCH, &sa, NULL) < 0)
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ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGWINCH)");
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#else
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if (!one_process) {
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apr_signal(SIGSEGV, sig_coredump);
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#ifdef SIGBUS
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apr_signal(SIGBUS, sig_coredump);
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#endif /* SIGBUS */
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#ifdef SIGABORT
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apr_signal(SIGABORT, sig_coredump);
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#endif /* SIGABORT */
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#ifdef SIGABRT
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apr_signal(SIGABRT, sig_coredump);
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#endif /* SIGABRT */
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#ifdef SIGILL
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apr_signal(SIGILL, sig_coredump);
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#endif /* SIGILL */
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#ifdef SIGXCPU
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apr_signal(SIGXCPU, SIG_DFL);
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#endif /* SIGXCPU */
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#ifdef SIGXFSZ
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apr_signal(SIGXFSZ, SIG_DFL);
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#endif /* SIGXFSZ */
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}
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apr_signal(SIGTERM, sig_term);
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#ifdef SIGHUP
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apr_signal(SIGHUP, restart);
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#endif /* SIGHUP */
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#ifdef SIGWINCH
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apr_signal(SIGWINCH, restart);
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#endif /* SIGWINCH */
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#ifdef SIGPIPE
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apr_signal(SIGPIPE, SIG_IGN);
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#endif /* SIGPIPE */
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#endif
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}
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/*****************************************************************
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* Here follows a long bunch of generic server bookkeeping stuff...
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*/
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int ap_graceful_stop_signalled(void)
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{
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/* XXX - Does this really work? - Manoj */
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return is_graceful;
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}
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/*****************************************************************
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* Child process main loop.
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*/
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static void process_socket(apr_pool_t *p, apr_socket_t *sock, int my_child_num, int my_thread_num)
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{
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conn_rec *current_conn;
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long conn_id = my_child_num * HARD_THREAD_LIMIT + my_thread_num;
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int csd;
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(void) apr_get_os_sock(&csd, sock);
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if (csd >= FD_SETSIZE) {
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ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, NULL,
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"new file descriptor %d is too large; you probably need "
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"to rebuild Apache with a larger FD_SETSIZE "
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"(currently %d)",
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csd, FD_SETSIZE);
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apr_close_socket(sock);
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return;
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}
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ap_sock_disable_nagle(sock);
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(void) ap_update_child_status(my_child_num, my_thread_num,
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SERVER_BUSY_READ, (request_rec *) NULL);
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current_conn = ap_new_apr_connection(p, ap_server_conf, sock,
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conn_id);
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ap_process_connection(current_conn);
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ap_lingering_close(current_conn);
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}
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/* Sets workers_may_exit if we received a character on the pipe_of_death */
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static void check_pipe_of_death(void)
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{
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pthread_mutex_lock(&pipe_of_death_mutex);
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if (!workers_may_exit) {
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apr_status_t ret;
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char pipe_read_char;
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apr_ssize_t n = 1;
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ret = apr_recv(listensocks[0], &pipe_read_char, &n);
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if (APR_STATUS_IS_EAGAIN(ret)) {
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/* It lost the lottery. It must continue to suffer
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* through a life of servitude. */
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}
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else {
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/* It won the lottery (or something else is very
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* wrong). Embrace death with open arms. */
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workers_may_exit = 1;
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}
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}
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pthread_mutex_unlock(&pipe_of_death_mutex);
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}
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static void * worker_thread(void * dummy)
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{
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proc_info * ti = dummy;
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int process_slot = ti->pid;
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int thread_slot = ti->tid;
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apr_pool_t *tpool = ti->tpool;
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apr_socket_t *csd = NULL;
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apr_pool_t *ptrans; /* Pool for per-transaction stuff */
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apr_socket_t *sd = NULL;
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int n;
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int curr_pollfd, last_pollfd = 0;
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apr_pollfd_t *pollset;
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apr_status_t rv;
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free(ti);
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apr_create_pool(&ptrans, tpool);
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pthread_mutex_lock(&worker_thread_count_mutex);
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worker_thread_count++;
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pthread_mutex_unlock(&worker_thread_count_mutex);
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apr_setup_poll(&pollset, num_listensocks+1, tpool);
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for(n=0 ; n <= num_listensocks ; ++n)
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apr_add_poll_socket(pollset, listensocks[n], APR_POLLIN);
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/* TODO: Switch to a system where threads reuse the results from earlier
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poll calls - manoj */
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while (!workers_may_exit) {
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workers_may_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0);
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if (workers_may_exit) break;
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(void) ap_update_child_status(process_slot, thread_slot, SERVER_READY,
|
|
(request_rec *) NULL);
|
|
pthread_mutex_lock(&thread_accept_mutex);
|
|
if (workers_may_exit) {
|
|
pthread_mutex_unlock(&thread_accept_mutex);
|
|
break;
|
|
}
|
|
if ((rv = SAFE_ACCEPT(apr_lock(process_accept_mutex)))
|
|
!= APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"apr_lock failed. Attempting to shutdown "
|
|
"process gracefully.");
|
|
workers_may_exit = 1;
|
|
}
|
|
|
|
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)");
|
|
workers_may_exit = 1;
|
|
}
|
|
|
|
if (workers_may_exit) break;
|
|
|
|
apr_get_revents(&event, listensocks[0], pollset);
|
|
if (event & APR_POLLIN) {
|
|
/* A process got a signal on the shutdown pipe. Check if we're
|
|
* the lucky process to die. */
|
|
check_pipe_of_death();
|
|
continue;
|
|
}
|
|
|
|
if (num_listensocks == 1) {
|
|
sd = ap_listeners->sd;
|
|
goto got_fd;
|
|
}
|
|
else {
|
|
/* find a listener */
|
|
curr_pollfd = last_pollfd;
|
|
do {
|
|
curr_pollfd++;
|
|
if (curr_pollfd > num_listensocks) {
|
|
curr_pollfd = 1;
|
|
}
|
|
/* XXX: Should we check for POLLERR? */
|
|
apr_get_revents(&event, listensocks[curr_pollfd], pollset);
|
|
if (event & APR_POLLIN) {
|
|
last_pollfd = curr_pollfd;
|
|
sd=listensocks[curr_pollfd];
|
|
goto got_fd;
|
|
}
|
|
} while (curr_pollfd != last_pollfd);
|
|
}
|
|
}
|
|
got_fd:
|
|
if (!workers_may_exit) {
|
|
if ((rv = 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_unlock(process_accept_mutex)))
|
|
!= APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"apr_unlock failed. Attempting to shutdown "
|
|
"process gracefully.");
|
|
workers_may_exit = 1;
|
|
}
|
|
pthread_mutex_unlock(&thread_accept_mutex);
|
|
if (csd != NULL) {
|
|
process_socket(ptrans, csd, process_slot, thread_slot);
|
|
requests_this_child--;
|
|
}
|
|
}
|
|
else {
|
|
if ((rv = SAFE_ACCEPT(apr_unlock(process_accept_mutex)))
|
|
!= APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"apr_unlock failed. Attempting to shutdown "
|
|
"process gracefully.");
|
|
workers_may_exit = 1;
|
|
}
|
|
pthread_mutex_unlock(&thread_accept_mutex);
|
|
break;
|
|
}
|
|
apr_clear_pool(ptrans);
|
|
}
|
|
|
|
apr_destroy_pool(tpool);
|
|
ap_update_child_status(process_slot, thread_slot, SERVER_DEAD,
|
|
(request_rec *) NULL);
|
|
pthread_mutex_lock(&worker_thread_count_mutex);
|
|
worker_thread_count--;
|
|
if (worker_thread_count == 0) {
|
|
/* All the threads have exited, now finish the shutdown process
|
|
* by signalling the sigwait thread */
|
|
kill(ap_my_pid, SIGTERM);
|
|
}
|
|
pthread_mutex_unlock(&worker_thread_count_mutex);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void child_main(int child_num_arg)
|
|
{
|
|
sigset_t sig_mask;
|
|
int signal_received;
|
|
pthread_t thread;
|
|
pthread_attr_t thread_attr;
|
|
int i;
|
|
int my_child_num = child_num_arg;
|
|
proc_info *my_info = NULL;
|
|
ap_listen_rec *lr;
|
|
apr_status_t rv;
|
|
|
|
|
|
ap_my_pid = getpid();
|
|
apr_create_pool(&pchild, pconf);
|
|
|
|
/*stuff to do before we switch id's, so we have permissions.*/
|
|
reopen_scoreboard(pchild);
|
|
|
|
rv = SAFE_ACCEPT(apr_child_init_lock(&process_accept_mutex, lock_fname,
|
|
pchild));
|
|
if (rv != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
|
|
"Couldn't initialize cross-process lock in child");
|
|
clean_child_exit(APEXIT_CHILDFATAL);
|
|
}
|
|
|
|
if (unixd_setup_child()) {
|
|
clean_child_exit(APEXIT_CHILDFATAL);
|
|
}
|
|
|
|
ap_child_init_hook(pchild, ap_server_conf);
|
|
|
|
/*done with init critical section */
|
|
|
|
/* All threads should mask signals out, accoring to sigwait(2) man page */
|
|
sigfillset(&sig_mask);
|
|
|
|
#ifdef SIGPROCMASK_SETS_THREAD_MASK
|
|
if (sigprocmask(SIG_SETMASK, &sig_mask, NULL) != 0) {
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, "sigprocmask");
|
|
}
|
|
#else
|
|
if ((rv = pthread_sigmask(SIG_SETMASK, &sig_mask, NULL)) != 0) {
|
|
#ifdef PTHREAD_SETS_ERRNO
|
|
rv = errno;
|
|
#endif
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, "pthread_sigmask");
|
|
}
|
|
#endif
|
|
|
|
requests_this_child = ap_max_requests_per_child;
|
|
|
|
/* 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 */
|
|
|
|
worker_thread_count = 0;
|
|
pthread_mutex_init(&worker_thread_count_mutex, NULL);
|
|
pthread_mutex_init(&pipe_of_death_mutex, NULL);
|
|
pthread_attr_init(&thread_attr);
|
|
#ifdef PTHREAD_ATTR_SETDETACHSTATE_ARG2_ADDR
|
|
{
|
|
int on = 1;
|
|
|
|
pthread_attr_setdetachstate(&thread_attr, &on);
|
|
}
|
|
#else
|
|
pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_DETACHED);
|
|
#endif
|
|
for (i=0; i < ap_threads_per_child; i++) {
|
|
|
|
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;
|
|
apr_create_pool(&my_info->tpool, pchild);
|
|
|
|
/* We are creating threads right now */
|
|
(void) ap_update_child_status(my_child_num, i, SERVER_STARTING,
|
|
(request_rec *) NULL);
|
|
#ifndef NO_THREADS
|
|
if ((rv = pthread_create(&thread, &thread_attr, worker_thread, my_info))) {
|
|
#ifdef PTHREAD_SETS_ERRNO
|
|
rv = errno;
|
|
#endif
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
|
|
"pthread_create: unable to create worker thread");
|
|
/* In case system resources are maxxed out, we don't want
|
|
Apache running away with the CPU trying to fork over and
|
|
over and over again if we exit. */
|
|
sleep(10);
|
|
clean_child_exit(APEXIT_CHILDFATAL);
|
|
}
|
|
#else
|
|
worker_thread(my_info);
|
|
/* The SIGTERM shouldn't let us reach this point, but just in case... */
|
|
clean_child_exit(APEXIT_OK);
|
|
#endif
|
|
|
|
/* We let each thread update it's own scoreboard entry. This is done
|
|
* because it let's us deal with tid better.
|
|
*/
|
|
}
|
|
|
|
pthread_attr_destroy(&thread_attr);
|
|
|
|
/* This thread will be the one responsible for handling signals */
|
|
sigemptyset(&sig_mask);
|
|
sigaddset(&sig_mask, SIGTERM);
|
|
sigaddset(&sig_mask, SIGINT);
|
|
ap_sigwait(&sig_mask, &signal_received);
|
|
switch (signal_received) {
|
|
case SIGTERM:
|
|
case SIGINT:
|
|
just_die(signal_received);
|
|
break;
|
|
default:
|
|
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
|
|
"received impossible signal: %d", signal_received);
|
|
just_die(SIGTERM);
|
|
}
|
|
}
|
|
|
|
static int make_child(server_rec *s, int slot, time_t now)
|
|
{
|
|
int pid;
|
|
|
|
if (slot + 1 > ap_max_daemons_limit) {
|
|
ap_max_daemons_limit = slot + 1;
|
|
}
|
|
|
|
if (one_process) {
|
|
set_signals();
|
|
ap_scoreboard_image->parent[slot].pid = getpid();
|
|
child_main(slot);
|
|
}
|
|
|
|
/* Tag this slot as occupied so that perform_idle_server_maintenance
|
|
* doesn't try to steal it */
|
|
(void) ap_update_child_status(slot, 0, SERVER_STARTING, (request_rec *) NULL);
|
|
|
|
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
|
|
*/
|
|
(void) ap_update_child_status(slot, 0, SERVER_DEAD, (request_rec *) 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 AIX_BIND_PROCESSOR
|
|
/* By default, AIX binds to a single processor. This bit unbinds
|
|
children which will then bind to another CPU.
|
|
*/
|
|
#include <sys/processor.h>
|
|
int status = bindprocessor(BINDPROCESS, (int)getpid(),
|
|
PROCESSOR_CLASS_ANY);
|
|
if (status != OK)
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, ap_server_conf,
|
|
"processor unbind failed %d", status);
|
|
#endif
|
|
|
|
RAISE_SIGSTOP(MAKE_CHILD);
|
|
|
|
apr_signal(SIGTERM, just_die);
|
|
child_main(slot);
|
|
|
|
return 0;
|
|
}
|
|
/* else */
|
|
ap_scoreboard_image->parent[slot].pid = pid;
|
|
return 0;
|
|
}
|
|
|
|
/* 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) < 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;
|
|
thread_score *ss;
|
|
time_t now = 0;
|
|
int free_length;
|
|
int free_slots[MAX_SPAWN_RATE];
|
|
int last_non_dead;
|
|
int total_non_dead;
|
|
apr_ssize_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 all_dead_threads = 1;
|
|
int idle_thread_addition = 0;
|
|
|
|
if (i >= ap_max_daemons_limit && free_length == idle_spawn_rate)
|
|
break;
|
|
for (j = 0; j < ap_threads_per_child; j++) {
|
|
ss = &ap_scoreboard_image->servers[i][j];
|
|
status = ss->status;
|
|
|
|
any_dying_threads = any_dying_threads || (status == SERVER_DEAD)
|
|
|| (status == SERVER_GRACEFUL);
|
|
all_dead_threads = all_dead_threads && (status == SERVER_DEAD);
|
|
|
|
/* We consider a starting server as idle because we started it
|
|
* at least a cycle ago, and if it still hasn't finished starting
|
|
* then we're just going to swamp things worse by forking more.
|
|
* So we hopefully won't need to fork more if we count it.
|
|
* This depends on the ordering of SERVER_READY and SERVER_STARTING.
|
|
*/
|
|
if (status <= SERVER_READY) {
|
|
++idle_thread_addition;
|
|
}
|
|
}
|
|
if (all_dead_threads && free_length < idle_spawn_rate) {
|
|
free_slots[free_length] = i;
|
|
++free_length;
|
|
}
|
|
if (!all_dead_threads) {
|
|
last_non_dead = i;
|
|
}
|
|
if (!any_dying_threads) {
|
|
++total_non_dead;
|
|
idle_thread_count += idle_thread_addition;
|
|
}
|
|
}
|
|
ap_max_daemons_limit = last_non_dead + 1;
|
|
|
|
if (idle_thread_count > max_spare_threads) {
|
|
/* Kill off one child */
|
|
char char_of_death = '!';
|
|
if ((rv = apr_write(pipe_of_death_out, &char_of_death, &one)) != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, "write pipe_of_death");
|
|
}
|
|
idle_spawn_rate = 1;
|
|
}
|
|
else if (idle_thread_count < min_spare_threads) {
|
|
/* terminate the free list */
|
|
if (free_length == 0) {
|
|
/* only report this condition once */
|
|
static int reported = 0;
|
|
|
|
if (!reported) {
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, ap_server_conf,
|
|
"server reached MaxClients setting, consider"
|
|
" raising the MaxClients setting");
|
|
reported = 1;
|
|
}
|
|
idle_spawn_rate = 1;
|
|
}
|
|
else {
|
|
|
|
if (idle_spawn_rate >= 8) {
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, ap_server_conf,
|
|
"server seems busy, (you may need "
|
|
"to increase StartServers, ThreadsPerChild "
|
|
"or Min/MaxSpareThreads), "
|
|
"spawning %d children, there are around %d idle "
|
|
"threads, and %d total children", idle_spawn_rate,
|
|
idle_thread_count, total_non_dead);
|
|
}
|
|
for (i = 0; i < free_length; ++i) {
|
|
make_child(ap_server_conf, free_slots[i], now);
|
|
}
|
|
/* the next time around we want to spawn twice as many if this
|
|
* wasn't good enough, but not if we've just done a graceful
|
|
*/
|
|
if (hold_off_on_exponential_spawning) {
|
|
--hold_off_on_exponential_spawning;
|
|
}
|
|
else if (idle_spawn_rate < MAX_SPAWN_RATE) {
|
|
idle_spawn_rate *= 2;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
idle_spawn_rate = 1;
|
|
}
|
|
}
|
|
|
|
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 scoreboard. */
|
|
child_slot = find_child_by_pid(&pid);
|
|
if (child_slot >= 0) {
|
|
ap_mpmt_pthread_force_reset_connection_status(child_slot);
|
|
for (i = 0; i < ap_threads_per_child; i++)
|
|
ap_update_child_status(child_slot, i, SERVER_DEAD, (request_rec *) NULL);
|
|
|
|
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, 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
|
|
* 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;
|
|
apr_ssize_t one = 1;
|
|
|
|
pconf = _pconf;
|
|
ap_server_conf = s;
|
|
rv = apr_create_pipe(&pipe_of_death_in, &pipe_of_death_out, pconf);
|
|
if (rv != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_ERR, rv,
|
|
(const server_rec*) ap_server_conf,
|
|
"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_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.%u",
|
|
ap_server_root_relative(_pconf, lock_fname),
|
|
ap_my_pid);
|
|
rv = apr_create_lock(&process_accept_mutex, APR_MUTEX, APR_CROSS_PROCESS,
|
|
lock_fname, _pconf);
|
|
if (rv != APR_SUCCESS) {
|
|
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
|
|
"Couldn't create cross-process lock");
|
|
return 1;
|
|
}
|
|
|
|
|
|
if (!is_graceful) {
|
|
reinit_scoreboard(pconf);
|
|
}
|
|
|
|
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 SIGWINCH). This happens pretty
|
|
* rapidly... and for each one that exits we'll start a new one until
|
|
* we reach at least daemons_min_free. But we may be permitted to
|
|
* start more than that, so we'll just keep track of how many we're
|
|
* supposed to start up without the 1 second penalty between each fork.
|
|
*/
|
|
remaining_children_to_start = ap_daemons_to_start;
|
|
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...
|
|
*/
|
|
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();
|
|
|
|
if (is_graceful) {
|
|
int i, j;
|
|
char char_of_death = '!';
|
|
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
|
|
"SIGWINCH received. Doing graceful restart");
|
|
|
|
/* give the children the signal to die */
|
|
for (i = 0; i < ap_daemons_limit;) {
|
|
if ((rv = apr_write(pipe_of_death_in, &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++;
|
|
}
|
|
|
|
/* This is mostly for debugging... so that we know what is still
|
|
* gracefully dealing with existing request.
|
|
*/
|
|
|
|
for (i = 0; i < ap_daemons_limit; ++i) {
|
|
for (j = 0; j < ap_threads_per_child; j++) {
|
|
if (ap_scoreboard_image->servers[i][j].status != SERVER_DEAD) {
|
|
ap_scoreboard_image->servers[i][j].status = SERVER_GRACEFUL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
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");
|
|
}
|
|
if (!is_graceful) {
|
|
ap_restart_time = time(NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mpmt_pthread_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
|
|
{
|
|
static int restart_num = 0;
|
|
int no_detach = 0;
|
|
|
|
one_process = !!getenv("ONE_PROCESS");
|
|
no_detach = !!getenv("NO_DETACH");
|
|
|
|
/* sigh, want this only the second time around */
|
|
if (restart_num++ == 1) {
|
|
is_graceful = 0;
|
|
|
|
if (!one_process && !no_detach) {
|
|
apr_detach();
|
|
}
|
|
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 mpmt_pthread_hooks(void)
|
|
{
|
|
INIT_SIGLIST()
|
|
one_process = 0;
|
|
|
|
ap_hook_pre_config(mpmt_pthread_pre_config, NULL, NULL, AP_HOOK_MIDDLE);
|
|
}
|
|
|
|
|
|
static const char *set_pidfile(cmd_parms *cmd, void *dummy, const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
if (cmd->server->is_virtual) {
|
|
return "PidFile directive not allowed in <VirtualHost>";
|
|
}
|
|
ap_pid_fname = arg;
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_scoreboard(cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
ap_scoreboard_fname = arg;
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_lockfile(cmd_parms *cmd, void *dummy, const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
lock_fname = arg;
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
ap_daemons_to_start = atoi(arg);
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
min_spare_threads = atoi(arg);
|
|
if (min_spare_threads <= 0) {
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"WARNING: detected MinSpareThreads set to non-positive.");
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"Resetting to 1 to avoid almost certain Apache failure.");
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"Please read the documentation.");
|
|
min_spare_threads = 1;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
max_spare_threads = atoi(arg);
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_server_limit (cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
ap_daemons_limit = atoi(arg);
|
|
if (ap_daemons_limit > HARD_SERVER_LIMIT) {
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
"WARNING: MaxClients of %d exceeds compile time limit "
|
|
"of %d servers,", ap_daemons_limit, HARD_SERVER_LIMIT);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" lowering MaxClients to %d. To increase, please "
|
|
"see the", HARD_SERVER_LIMIT);
|
|
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
|
|
" HARD_SERVER_LIMIT define in %s.",
|
|
AP_MPM_HARD_LIMITS_FILE);
|
|
ap_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);
|
|
}
|
|
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 char *set_max_requests(cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
if (err != NULL) {
|
|
return err;
|
|
}
|
|
|
|
ap_max_requests_per_child = atoi(arg);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const char *set_coredumpdir (cmd_parms *cmd, void *dummy,
|
|
const char *arg)
|
|
{
|
|
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, 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 mpmt_pthread_cmds[] = {
|
|
UNIX_DAEMON_COMMANDS
|
|
LISTEN_COMMANDS
|
|
AP_INIT_TAKE1("PidFile", set_pidfile, NULL, RSRC_CONF,
|
|
"A file for logging the server process ID"),
|
|
AP_INIT_TAKE1("ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF,
|
|
"A file for Apache to maintain runtime process management information"),
|
|
AP_INIT_TAKE1("LockFile", set_lockfile, NULL, RSRC_CONF,
|
|
"The lockfile used when Apache needs to lock the accept() call"),
|
|
AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
|
|
"Number of child processes launched at server startup"),
|
|
AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
|
|
"Minimum number of idle children, to handle request spikes"),
|
|
AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
|
|
"Maximum number of idle children"),
|
|
AP_INIT_TAKE1("MaxClients", set_server_limit, NULL, RSRC_CONF,
|
|
"Maximum number of children alive at the same time"),
|
|
AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
|
|
"Number of threads each child creates"),
|
|
AP_INIT_TAKE1("MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF,
|
|
"Maximum number of requests a particular child serves before dying."),
|
|
AP_INIT_TAKE1("CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF,
|
|
"The location of the directory Apache changes to before dumping core"),
|
|
{ NULL }
|
|
};
|
|
|
|
module AP_MODULE_DECLARE_DATA mpm_mpmt_pthread_module = {
|
|
MPM20_MODULE_STUFF,
|
|
NULL, /* hook to run before apache parses args */
|
|
NULL, /* create per-directory config structure */
|
|
NULL, /* merge per-directory config structures */
|
|
NULL, /* create per-server config structure */
|
|
NULL, /* merge per-server config structures */
|
|
mpmt_pthread_cmds, /* command apr_table_t */
|
|
NULL, /* handlers */
|
|
mpmt_pthread_hooks /* register_hooks */
|
|
};
|
|
|