beos.c revision 9aa4b0b53f1b26086d04c51d77e742b698cfa653
06ba4a61654b3763ad65f52283832ebf058fdf1csliveap_/* ====================================================================
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * The Apache Software License, Version 1.1
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * Copyright (c) 2000 The Apache Software Foundation. All rights
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * reserved.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * Redistribution and use in source and binary forms, with or without
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * modification, are permitted provided that the following conditions
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * are met:
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * 1. Redistributions of source code must retain the above copyright
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * notice, this list of conditions and the following disclaimer.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * 2. Redistributions in binary form must reproduce the above copyright
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * notice, this list of conditions and the following disclaimer in
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * the documentation and/or other materials provided with the
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * distribution.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * 3. The end-user documentation included with the redistribution,
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * if any, must include the following acknowledgment:
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * "This product includes software developed by the
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * Apache Software Foundation (http://www.apache.org/)."
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * Alternately, this acknowledgment may appear in the software itself,
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * if and wherever such third-party acknowledgments normally appear.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * 4. The names "Apache" and "Apache Software Foundation" must
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * not be used to endorse or promote products derived from this
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * software without prior written permission. For written
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * permission, please contact apache@apache.org.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * 5. Products derived from this software may not be called "Apache",
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * nor may "Apache" appear in their name, without prior written
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * permission of the Apache Software Foundation.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * SUCH DAMAGE.
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * ====================================================================
06ba4a61654b3763ad65f52283832ebf058fdf1cslive *
06ba4a61654b3763ad65f52283832ebf058fdf1cslive * This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/* The new BeOS MPM!
*
* This one basically is a single process multi threaded model, but
* I couldn't be bothered adding the spmt_ to the front of the name!
* Anyway, this is still under development so it isn't yet the default
* choice.
*/
#define CORE_PRIVATE
#include "apr_portable.h"
#include "httpd.h"
#include "http_main.h"
#include "http_log.h"
#include "http_config.h" /* for read_config */
#include "http_core.h" /* for get_remote_host */
#include "http_connection.h"
#include "ap_mpm.h"
#include "beosd.h"
#include "iol_socket.h"
#include "ap_listen.h"
#include "scoreboard.h"
#include <kernel/OS.h>
#include "mpm_common.h"
#include "mpm.h"
#include <unistd.h>
#include <sys/socket.h>
/*
* Actual definitions of config globals
*/
int ap_threads_per_child=0; /* Worker threads per child */
int ap_max_requests_per_child=0;
static const char *ap_pid_fname=NULL;
static const char *ap_scoreboard_fname=NULL;
static int ap_threads_to_start=0;
static int min_spare_threads=0;
static int max_spare_threads=0;
static int ap_thread_limit=0;
static time_t ap_restart_time=0;
API_VAR_EXPORT int ap_extended_status = 0;
static int num_listening_sockets = 0; /* set by open_listeners in ap_mpm_run */
static ap_socket_t ** listening_sockets;
ap_lock_t *accept_mutex = NULL;
static ap_pool_t *pconf; /* Pool for config stuff */
static ap_pool_t *pchild; /* Pool for httpd child stuff */
static int server_pid;
/* Keep track of the number of worker threads currently active */
static int worker_thread_count;
ap_lock_t *worker_thread_count_mutex;
/* The structure used to pass unique initialization info to each thread */
typedef struct {
int slot;
ap_pool_t *tpool;
} proc_info;
struct ap_ctable ap_child_table[HARD_SERVER_LIMIT];
/*
* The max child slot ever assigned, preserved across restarts. Necessary
* to deal with MaxClients changes across SIGWINCH restarts. We use this
* value to optimize routines that have to scan the entire scoreboard.
*/
int ap_max_child_assigned = -1;
int ap_max_threads_limit = -1;
char ap_coredump_dir[MAX_STRING_LEN];
static port_id port_of_death;
/* shared http_main globals... */
server_rec *ap_server_conf;
/* one_process */
static int one_process = 0;
#ifdef DEBUG_SIGSTOP
int raise_sigstop_flags;
#endif
API_EXPORT(int) ap_get_max_daemons(void)
{
return ap_max_child_assigned;
}
/* a clean exit from a child with proper cleanup
static void clean_child_exit(int code) __attribute__ ((noreturn)); */
static void clean_child_exit(int code)
{
if (pchild)
ap_destroy_pool(pchild);
exit(code);
}
/* handle all varieties of core dumping signals */
static void sig_coredump(int sig)
{
chdir(ap_coredump_dir);
signal(sig, SIG_DFL);
kill(server_pid, sig);
/* At this point we've got sig blocked, because we're still inside
* the signal handler. When we leave the signal handler it will
* be unblocked, and we'll take the signal... and coredump or whatever
* is appropriate for this particular Unix. In addition the parent
* will see the real signal we received -- whereas if we called
* abort() here, the parent would only see SIGABRT.
*/
}
/*****************************************************************
* Connection structures and accounting...
*/
/* volatile just in case */
static int volatile shutdown_pending;
static int volatile restart_pending;
static int volatile is_graceful;
/*
* ap_start_shutdown() and ap_start_restart(), below, are a first stab at
* functions to initiate shutdown or restart without relying on signals.
* Previously this was initiated in sig_term() and restart() signal handlers,
* but we want to be able to start a shutdown/restart from other sources --
* e.g. on Win32, from the service manager. Now the service manager can
* call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
* these functions can also be called by the child processes, since global
* variables are no longer used to pass on the required action to the parent.
*
* These should only be called from the parent process itself, since the
* parent process will use the shutdown_pending and restart_pending variables
* to determine whether to shutdown or restart. The child process should
* call signal_parent() directly to tell the parent to die -- this will
* cause neither of those variable to be set, which the parent will
* assume means something serious is wrong (which it will be, for the
* child to force an exit) and so do an exit anyway.
*/
void ap_start_shutdown(void)
{
if (shutdown_pending == 1) {
/* Um, is this _probably_ not an error, if the user has
* tried to do a shutdown twice quickly, so we won't
* worry about reporting it.
*/
return;
}
shutdown_pending = 1;
}
/* do a graceful restart if graceful == 1 */
void ap_start_restart(int graceful)
{
if (restart_pending == 1) {
/* Probably not an error - don't bother reporting it */
return;
}
restart_pending = 1;
is_graceful = graceful;
}
static void sig_term(int sig)
{
ap_start_shutdown();
}
static void restart(int sig)
{
ap_start_restart(sig == SIGWINCH);
}
static void tell_workers_to_exit(void)
{
int i, code = 99;
for (i=0;i<ap_max_child_assigned;i++) {
if (ap_child_table[i].status != SERVER_DEAD)
write_port(port_of_death, code, NULL, 0);
}
}
static void push_workers_off_cliff(int sig)
{
int i;
for (i=0;i<ap_max_child_assigned;i++)
kill(ap_child_table[i].pid, sig);
}
static void set_signals(void)
{
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (!one_process) {
sa.sa_handler = sig_coredump;
if (sigaction(SIGSEGV, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)");
if (sigaction(SIGBUS, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)");
if (sigaction(SIGABRT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)");
if (sigaction(SIGILL, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)");
sa.sa_flags = 0;
}
sa.sa_handler = sig_term;
if (sigaction(SIGTERM, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
if (sigaction(SIGINT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
/* we want to ignore HUPs and WINCH while we're busy processing one */
sigaddset(&sa.sa_mask, SIGHUP);
sigaddset(&sa.sa_mask, SIGWINCH);
sa.sa_handler = restart;
if (sigaction(SIGHUP, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
if (sigaction(SIGWINCH, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGWINCH)");
}
/*****************************************************************
* Here follows a long bunch of generic server bookkeeping stuff...
*/
//#define sock_disable_nagle(s) /* NOOP */
int ap_graceful_stop_signalled(void)
{
/* XXX - Does this really work? - Manoj */
return is_graceful;
}
/*****************************************************************
* Child process main loop.
*/
static void process_socket(ap_pool_t *p, ap_socket_t *sock, int my_child_num)
{
BUFF *conn_io;
conn_rec *current_conn;
ap_iol *iol;
long conn_id = my_child_num;
int csd;
(void)ap_get_os_sock(&csd, sock);
if (csd >= FD_SETSIZE) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, NULL,
"filedescriptor (%u) larger than FD_SETSIZE (%u) "
"found, you probably need to rebuild Apache with a "
"larger FD_SETSIZE", csd, FD_SETSIZE);
ap_close_socket(sock);
return;
}
iol = ap_iol_attach_socket(p, sock);
if (iol == NULL) {
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, NULL,
"error attaching to socket");
ap_close_socket(sock);
return;
}
conn_io = ap_bcreate(p, B_RDWR);
ap_bpush_iol(conn_io, iol);
current_conn = ap_new_apr_connection(p, ap_server_conf, conn_io, sock,
conn_id);
ap_process_connection(current_conn);
ap_lingering_close(current_conn);
}
/* call_samaritans checks to see if there's a message waiting on the
* port_of_death. If there is then it return 1 and the worker thread
* should consider itself told to die. I use the _etc call to stop this
* from blocking the calling thread. As we've already checked I just use
* the basic read_port to actually remove the message from the queue.
*/
static int call_samaritans(port_id port) {
if (port_buffer_size_etc(port, B_TIMEOUT, 0) != B_WOULD_BLOCK) {
int32 code;
read_port(port, &code, NULL, 0);
return 1;
}
return 0;
}
static int32 worker_thread(void * dummy)
{
proc_info * ti = dummy;
int child_slot = ti->slot;
ap_pool_t *tpool = ti->tpool;
ap_socket_t *csd = NULL;
ap_pool_t *ptrans; /* Pool for per-transaction stuff */
ap_socket_t *sd = NULL;
ap_status_t rv = APR_EINIT;
int srv , n;
int curr_pollfd, last_pollfd = 0;
sigset_t sig_mask;
int requests_this_child = ap_max_requests_per_child;
ap_pollfd_t *pollset;
/* each worker thread is in control of it's own destiny...*/
int this_worker_should_exit = 0;
port_id chk = find_port("the_samaritans");
free(ti);
/* block the signals for this thread */
sigfillset(&sig_mask);
sigprocmask(SIG_BLOCK, &sig_mask, NULL);
ap_create_pool(&ptrans, tpool);
ap_lock(worker_thread_count_mutex);
worker_thread_count++;
ap_unlock(worker_thread_count_mutex);
/* now setup our own pollset...this will use APR woohoo! */
ap_setup_poll(&pollset, num_listening_sockets, tpool);
for(n=0 ; n < num_listening_sockets ; ++n)
ap_add_poll_socket(pollset, listening_sockets[n], APR_POLLIN);
while (!this_worker_should_exit) {
this_worker_should_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0);
if (this_worker_should_exit) break;
ap_lock(accept_mutex);
while (!this_worker_should_exit) {
ap_int16_t event;
ap_status_t ret = ap_poll(pollset, &srv, -1);
if (call_samaritans(chk))
this_worker_should_exit = 1;
if (ret != APR_SUCCESS) {
if (errno == EINTR) {
continue;
}
/* poll() will only return errors in catastrophic
* circumstances. Let's try exiting gracefully, for now. */
ap_log_error(APLOG_MARK, APLOG_ERR, ret, (const server_rec *)
ap_server_conf, "ap_poll: (listen)");
this_worker_should_exit = 1;
}
if (this_worker_should_exit) break;
if (num_listening_sockets == 1) {
sd = ap_listeners->sd;
goto got_fd;
}
else {
/* find a listener */
curr_pollfd = last_pollfd;
do {
curr_pollfd++;
if (curr_pollfd > num_listening_sockets) {
curr_pollfd = 1;
}
/* Get the revent... */
ap_get_revents(&event, listening_sockets[curr_pollfd], pollset);
if (event & APR_POLLIN) {
last_pollfd = curr_pollfd;
sd = listening_sockets[curr_pollfd];
goto got_fd;
}
} while (curr_pollfd != last_pollfd);
}
}
got_fd:
if (!this_worker_should_exit) {
ap_unlock(accept_mutex);
if ((rv = ap_accept(&csd, sd, ptrans)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
"ap_accept");
} else {
process_socket(ptrans, csd, child_slot);
requests_this_child--;
}
}
else {
ap_unlock(accept_mutex);
break;
}
ap_clear_pool(ptrans);
}
ap_destroy_pool(tpool);
ap_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(server_pid, SIGTERM);
}
ap_unlock(worker_thread_count_mutex);
return (0);
}
static int make_worker(server_rec *s, int slot, time_t now)
{
thread_id tid;
proc_info *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->slot = slot;
ap_create_pool(&my_info->tpool, pchild);
if (slot + 1 > ap_max_child_assigned)
ap_max_child_assigned = slot + 1;
if (one_process) {
set_signals();
ap_child_table[slot].pid = getpid();
ap_child_table[slot].status = SERVER_ALIVE;
return 0;
}
tid = spawn_thread(worker_thread, "apache_worker", B_NORMAL_PRIORITY,
my_info);
if (tid < B_NO_ERROR) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, s,
"spawn_thread: Unable to start a new 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. */
sleep(10);
return -1;
}
resume_thread(tid);
ap_child_table[slot].pid = tid;
ap_child_table[slot].status = SERVER_ALIVE;
return 0;
}
/* start up a bunch of children */
static void startup_threads(int number_to_start)
{
int i;
for (i = 0; number_to_start && i < ap_thread_limit; ++i) {
if (ap_child_table[i].status != SERVER_DEAD) {
continue;
}
if (make_worker(ap_server_conf, i, 0) < 0) {
break;
}
--number_to_start;
}
}
/*
* 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 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;
time_t now = 0;
int free_length;
int free_slots[MAX_SPAWN_RATE];
int last_non_dead;
/* initialize the free_list */
free_length = 0;
for (i = 0; i < ap_thread_limit; ++i) {
if (ap_child_table[i].status == SERVER_DEAD) {
if (free_length < spawn_rate) {
free_slots[free_length] = i;
++free_length;
}
}
else {
last_non_dead = i;
}
if (i >= ap_max_child_assigned && free_length >= spawn_rate) {
break;
}
}
ap_max_child_assigned = last_non_dead + 1;
if (free_length > 0) {
for (i = 0; i < free_length; ++i) {
make_worker(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_threads_to_start)
{
int child_slot;
ap_wait_t status;
ap_proc_t pid;
int i;
while (!restart_pending && !shutdown_pending) {
ap_wait_or_timeout(&status, &pid, pconf);
if (pid.pid >= 0) {
ap_process_child_status(pid.pid, status);
/* non-fatal death... note that it's gone in the scoreboard. */
child_slot = -1;
for (i = 0; i < ap_max_child_assigned; ++i) {
if (ap_child_table[i].pid == pid.pid) {
int j;
child_slot = i;
for (j = 0; j < HARD_THREAD_LIMIT; j++) {
ap_beos_force_reset_connection_status(i * HARD_THREAD_LIMIT + j);
}
break;
}
}
if (child_slot >= 0) {
ap_child_table[child_slot].status = SERVER_DEAD;
if (remaining_threads_to_start
&& child_slot < ap_thread_limit) {
/* we're still doing a 1-for-1 replacement of dead
* children with new children
*/
make_worker(ap_server_conf, child_slot, time(NULL));
--remaining_threads_to_start;
}
#ifdef APR_HAS_OTHER_CHILD
}
else if (ap_reap_other_child(&pid, status) == 0) {
/* handled */
#endif
}
else if (is_graceful) {
/* Great, we've probably just lost a slot in the
* scoreboard. Somehow we don't know about this
* child.
*/
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, ap_server_conf,
"long lost child came home! (pid %ld)", 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_threads_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_threads(remaining_threads_to_start);
remaining_threads_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(ap_pool_t *_pconf, ap_pool_t *plog, server_rec *s)
{
int remaining_threads_to_start, i;
ap_status_t rv;
ap_listen_rec *lr;
pconf = _pconf;
ap_server_conf = s;
if ((port_of_death = create_port(ap_thread_limit, "the_samaritans")) < 0){
ap_log_error(APLOG_MARK, APLOG_ALERT, errno, s,
"couldn't create a port_of_death, shutting down");
return 1;
}
if ((num_listening_sockets = ap_setup_listeners(ap_server_conf)) < 1) {
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);
/*
* Create our locks...
*/
/* accept_mutex
* used to lock around select so we only have one thread
* in select at a time
*/
if ((rv = ap_create_lock(&accept_mutex, APR_MUTEX, APR_CROSS_PROCESS,
NULL, pconf)) != APR_SUCCESS) {
/* tsch tsch, can't have more than one thread in the accept loop
at a time so we need to fall on our sword... */
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
"Couldn't create accept lock");
return 1;
}
/* worker_thread_count_mutex
* locks the worker_thread_count so we have ana ccurate count...
*/
if ((rv = ap_create_lock(&worker_thread_count_mutex, APR_MUTEX, APR_CROSS_PROCESS,
NULL, pconf)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
"Couldn't create worker thread count lock");
return 1;
}
/*
* Startup/shutdown...
*/
if (!is_graceful)
reinit_scoreboard(pconf);
set_signals();
/* Sanity cehcks to avoid thrashing... */
if (max_spare_threads < min_spare_threads )
max_spare_threads = min_spare_threads;
/* If we're doing a graceful_restart then we're going to see a lot
* of threads 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 threads_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_threads_to_start = ap_threads_to_start;
/* sanity check on the number to start... */
if (remaining_threads_to_start > ap_thread_limit) {
remaining_threads_to_start = ap_thread_limit;
}
/* setup the child pool to use for the workers. Each worker creates
* a seperate pool of it's own to use.
*/
ap_create_pool(&pchild, pconf);
ap_child_init_hook(pchild, ap_server_conf);
/* Now that we have the child pool (pchild) we can allocate
* the listenfds and creat the pollset...
*/
listening_sockets = ap_palloc(pchild,
sizeof(*listening_sockets) * (num_listening_sockets));
for (lr = ap_listeners, i = 0; i < num_listening_sockets; lr = lr->next, ++i)
listening_sockets[i]=lr->sd;
/* we assume all goes OK...hmm might want to check that! */
if (!is_graceful) {
startup_threads(remaining_threads_to_start);
remaining_threads_to_start = 0;
}
else {
/* give the system some time to recover before kicking into
* exponential mode */
hold_off_on_exponential_spawning = 10;
}
/*
* record that we've entered the world !
*/
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;
/*
* main_loop until it's all over
*/
server_main_loop(remaining_threads_to_start);
/*
* If we get here we're shutting down...
*/
if (shutdown_pending) {
/* Time to gracefully shut down:
* Kill child processes, tell them to call child_exit, etc...
*/
if (beosd_killpg(getpgrp(), SIGTERM) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf,
"killpg 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());
}
/* use ap_reclaim_child_processes starting with SIGTERM */
ap_reclaim_child_processes(1);
/* record the shutdown in the log */
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 */
signal(SIGHUP, SIG_IGN);
if (one_process) {
return 1;
}
if (is_graceful) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"SIGWINCH received. Doing graceful restart");
tell_workers_to_exit();
/* TODO - need to test some ideas here... */
}
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.
*/
push_workers_off_cliff(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);
}
/* just before we go, tidy up the locks we've created to prevent a
* potential leak of semaphores... */
ap_destroy_lock(worker_thread_count_mutex);
ap_destroy_lock(accept_mutex);
delete_port(port_of_death);
return 0;
}
static void beos_pre_config(ap_pool_t *pconf, ap_pool_t *plog, ap_pool_t *ptemp)
{
static int restart_num = 0;
one_process = !!getenv("ONE_PROCESS");
/* sigh, want this only the second time around */
if (restart_num++ == 1) {
is_graceful = 0;
if (!one_process)
ap_detach();
server_pid = getpid();
}
beosd_pre_config();
ap_listen_pre_config();
ap_threads_to_start = DEFAULT_START_THREADS;
min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
ap_thread_limit = HARD_SERVER_LIMIT;
ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
ap_pid_fname = DEFAULT_PIDLOG;
ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
ap_beos_set_maintain_connection_status(1);
ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
}
static void beos_hooks(void)
{
INIT_SIGLIST()
one_process = 0;
ap_hook_pre_config(beos_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_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_threads_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_thread_limit = atoi(arg);
if (ap_thread_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_thread_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 src/include/httpd.h.");
ap_thread_limit = HARD_SERVER_LIMIT;
}
else if (ap_thread_limit < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: Require MaxClients > 0, setting to 1");
ap_thread_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,\n", 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_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_beos_set_maintain_connection_status(arg != 0);
return NULL;
}
static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, const char *arg)
{
ap_finfo_t finfo;
const char *fname;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
fname = ap_server_root_relative(cmd->pool, arg);
if ((ap_stat(&finfo, fname, cmd->pool) != APR_SUCCESS) ||
(finfo.filetype != APR_DIR)) {
return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
" does not exist or is not a directory", NULL);
}
ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
return NULL;
}
static const command_rec beos_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( "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_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 MODULE_VAR_EXPORT mpm_beos_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 */
beos_cmds, /* command ap_table_t */
NULL, /* handlers */
beos_hooks /* register_hooks */
};