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94de8923dba848c60553c4f3cd594f45875cc428
apache/server/mpm/netware/mpm_netware.c
Jim Jagielski 70bb2575ea The old, legacy (and unused) code in which the scoreboard was totally 
and completely contained in a file (SCOREBOARD_FILE) has been
removed. This does not affect scoreboards which are *mapped* to
files using named-shared-memory at all. This implies that scoreboards
must be based, at some level, on native shared memory (mmap, shm_open,
shmget, whatever), but the code has assumed that for quite awhile
now. Having the scoreboard be *based* on a file makes no sense today.

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Obtained from:
Submitted by:
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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94306 13f79535-47bb-0310-9956-ffa450edef68
2002-03-29 14:33:50 +00:00

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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/*
* httpd.c: simple http daemon for answering WWW file requests
*
*
* 03-21-93 Rob McCool wrote original code (up to NCSA HTTPd 1.3)
*
* 03-06-95 blong
* changed server number for child-alone processes to 0 and changed name
* of processes
*
* 03-10-95 blong
* Added numerous speed hacks proposed by Robert S. Thau (rst@ai.mit.edu)
* including set group before fork, and call gettime before to fork
* to set up libraries.
*
* 04-14-95 rst / rh
* Brandon's code snarfed from NCSA 1.4, but tinkered to work with the
* Apache server, and also to have child processes do accept() directly.
*
* April-July '95 rst
* Extensive rework for Apache.
*/
#include "apr.h"
#include "apr_portable.h"
#include "apr_strings.h"
#include "apr_thread_proc.h"
#include "apr_signal.h"
#include "apr_tables.h"
#include "apr_getopt.h"
#include "apr_thread_mutex.h"
#define APR_WANT_STDIO
#define APR_WANT_STRFUNC
#include "apr_want.h"
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#define CORE_PRIVATE
#include "ap_config.h"
#include "httpd.h"
#include "mpm_default.h"
#include "http_main.h"
#include "http_log.h"
#include "http_config.h"
#include "http_core.h" /* for get_remote_host */
#include "http_connection.h"
#include "scoreboard.h"
#include "ap_mpm.h"
#include "mpm_common.h"
#include "ap_listen.h"
#include "ap_mmn.h"
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <signal.h>
#include <netware.h>
#include <nks/netware.h>
#include <library.h>
/* Limit on the total --- clients will be locked out if more servers than
* this are needed. It is intended solely to keep the server from crashing
* when things get out of hand.
*
* We keep a hard maximum number of servers, for two reasons --- first off,
* in case something goes seriously wrong, we want to stop the fork bomb
* short of actually crashing the machine we're running on by filling some
* kernel table. Secondly, it keeps the size of the scoreboard file small
* enough that we can read the whole thing without worrying too much about
* the overhead.
*/
#ifndef HARD_SERVER_LIMIT
#define HARD_SERVER_LIMIT 1
#endif
#define WORKER_DEAD SERVER_DEAD
#define WORKER_STARTING SERVER_STARTING
#define WORKER_READY SERVER_READY
#define WORKER_IDLE_KILL SERVER_IDLE_KILL
/* config globals */
int ap_threads_per_child=0; /* Worker threads per child */
int ap_thread_stack_size=65536;
static apr_thread_mutex_t *accept_lock;
static int ap_threads_to_start=0;
static int ap_threads_min_free=0;
static int ap_threads_max_free=0;
static int ap_threads_limit=0;
/*
* 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_workers_limit = -1;
server_rec *ap_server_conf;
/* *Non*-shared http_main globals... */
static fd_set listenfds;
static int listenmaxfd;
static apr_pool_t *pconf; /* Pool for config stuff */
static apr_pool_t *pmain; /* Pool for httpd child stuff */
static pid_t ap_my_pid; /* it seems silly to call getpid all the time */
static char *ap_my_addrspace = NULL;
static int die_now = 0;
static apr_thread_mutex_t *accept_mutex = NULL;
/* Keep track of the number of worker threads currently active */
static int worker_thread_count;
static apr_thread_mutex_t *worker_thread_count_mutex;
static int request_count;
/* Structure used to register/deregister a console handler with the OS */
static int InstallConsoleHandler(void);
static void RemoveConsoleHandler(void);
static int CommandLineInterpreter(scr_t screenID, const char *commandLine);
static CommandParser_t ConsoleHandler = {0, NULL, 0};
#define HANDLEDCOMMAND 0
#define NOTMYCOMMAND 1
static int show_settings = 0;
#if 0
#define DBPRINT0(s) printf(s)
#define DBPRINT1(s,v1) printf(s,v1)
#define DBPRINT2(s,v1,v2) printf(s,v1,v2)
#else
#define DBPRINT0(s)
#define DBPRINT1(s,v1)
#define DBPRINT2(s,v1,v2)
#endif
/* a clean exit from a child with proper cleanup */
static void clean_child_exit(int code, int worker_num) __attribute__ ((noreturn));
static void clean_child_exit(int code, int worker_num)
{
apr_thread_mutex_lock(worker_thread_count_mutex);
worker_thread_count--;
apr_thread_mutex_unlock(worker_thread_count_mutex);
if (worker_num >=0)
ap_update_child_status_from_indexes(0, worker_num, WORKER_DEAD,
(request_rec *) NULL);
NXThreadExit((void*)&code);
}
AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result)
{
switch(query_code){
case AP_MPMQ_MAX_DAEMON_USED:
*result = 1;
return APR_SUCCESS;
case AP_MPMQ_IS_THREADED:
*result = AP_MPMQ_DYNAMIC;
return APR_SUCCESS;
case AP_MPMQ_IS_FORKED:
*result = AP_MPMQ_NOT_SUPPORTED;
return APR_SUCCESS;
case AP_MPMQ_HARD_LIMIT_DAEMONS:
*result = HARD_SERVER_LIMIT;
return APR_SUCCESS;
case AP_MPMQ_HARD_LIMIT_THREADS:
*result = HARD_THREAD_LIMIT;
return APR_SUCCESS;
case AP_MPMQ_MAX_THREADS:
*result = ap_threads_limit;
return APR_SUCCESS;
case AP_MPMQ_MIN_SPARE_DAEMONS:
*result = 0;
return APR_SUCCESS;
case AP_MPMQ_MIN_SPARE_THREADS:
*result = ap_threads_min_free;
return APR_SUCCESS;
case AP_MPMQ_MAX_SPARE_DAEMONS:
*result = 0;
return APR_SUCCESS;
case AP_MPMQ_MAX_SPARE_THREADS:
*result = ap_threads_max_free;
return APR_SUCCESS;
case AP_MPMQ_MAX_REQUESTS_DAEMON:
*result = ap_max_requests_per_child;
return APR_SUCCESS;
case AP_MPMQ_MAX_DAEMONS:
*result = 1;
return APR_SUCCESS;
}
return APR_ENOTIMPL;
}
/*****************************************************************
* Connection structures and accounting...
*/
/* volatile just in case */
static int volatile shutdown_pending;
static int volatile restart_pending;
static int volatile is_graceful;
static int volatile wait_to_finish=1;
ap_generation_t volatile ap_my_generation=0;
static void mpm_term(void)
{
RemoveConsoleHandler();
wait_to_finish = 0;
}
static void sig_term(int sig)
{
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;
DBPRINT0 ("waiting for threads\n");
while (wait_to_finish) {
apr_thread_yield();
}
DBPRINT0 ("goodbye\n");
}
/* restart() is the signal handler for SIGHUP and SIGWINCH
* in the parent process, unless running in ONE_PROCESS mode
*/
static void restart(void)
{
if (restart_pending == 1) {
/* Probably not an error - don't bother reporting it */
return;
}
restart_pending = 1;
is_graceful = 1;
}
static void set_signals(void)
{
apr_signal(SIGTERM, sig_term);
apr_signal(SIGABRT, sig_term);
}
int nlmUnloadSignaled()
{
shutdown_pending = 1;
/* Hold off on this change for now */
/* while (wait_to_finish) {
NXThreadYield();
}
*/
return 1;
}
/*****************************************************************
* Child process main loop.
* The following vars are static to avoid getting clobbered by longjmp();
* they are really private to child_main.
*/
static fd_set main_fds;
int ap_graceful_stop_signalled(void)
{
/* not ever called anymore... */
return 0;
}
static int dont_block = 0;
static int missed_accept = 0;
static apr_socket_t *sd = NULL;
static int skipped_selects = 0;
static int would_block = 0;
/*static */
void worker_main(void *arg)
{
ap_listen_rec *lr;
ap_listen_rec *last_lr = NULL;
apr_pool_t *ptrans;
apr_allocator_t *allocator;
apr_bucket_alloc_t *bucket_alloc;
conn_rec *current_conn;
apr_status_t stat = APR_EINIT;
int worker_num_arg = (int)arg;
ap_sb_handle_t *sbh;
int my_worker_num = worker_num_arg;
apr_socket_t *csd = NULL;
int requests_this_child = 0;
int sockdes;
ap_listen_rec *first_lr;
int srv;
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
apr_allocator_create(&allocator);
apr_pool_create_ex(&ptrans, NULL, NULL, allocator);
apr_allocator_set_owner(allocator, ptrans);
bucket_alloc = apr_bucket_alloc_create(ptrans);
apr_pool_tag(ptrans, "transaction");
apr_thread_mutex_lock(worker_thread_count_mutex);
worker_thread_count++;
apr_thread_mutex_unlock(worker_thread_count_mutex);
ap_update_child_status_from_indexes(0, my_worker_num, WORKER_READY,
(request_rec *) NULL);
while (!die_now) {
/*
* (Re)initialize this child to a pre-connection state.
*/
current_conn = NULL;
apr_pool_clear(ptrans);
if ((ap_max_requests_per_child > 0
&& requests_this_child++ >= ap_max_requests_per_child)) {
clean_child_exit(0, my_worker_num);
}
ap_update_child_status_from_indexes(0, my_worker_num, WORKER_READY,
(request_rec *) NULL);
/*
* Wait for an acceptable connection to arrive.
*/
/* Only allow a single thread at a time into the "accept" loop */
apr_thread_mutex_lock(accept_mutex);
for (;;) {
if (shutdown_pending || restart_pending || (ap_scoreboard_image->servers[0][my_worker_num].status == WORKER_IDLE_KILL)) {
DBPRINT1 ("\nThread slot %d is shutting down\n", my_worker_num);
apr_thread_mutex_unlock(accept_mutex);
clean_child_exit(0, my_worker_num);
}
/* If we just satisfied a request on listen port x, assume that more
is coming. Don't bother using select() to determine if there is
more, just try to accept() the next request. */
if (dont_block && (missed_accept<10)) {
skipped_selects++;
}
else {
/* If we determine that there are no more requests on the listen
queue then set the socket back to blocking and move back into
more of an idle listen state. */
if (dont_block) {
apr_setsocketopt(sd, APR_SO_NONBLOCK, 0);
dont_block = 0;
}
/* Check the listen queue on all sockets for requests */
memcpy(&main_fds, &listenfds, sizeof(fd_set));
srv = select(listenmaxfd + 1, &main_fds, NULL, NULL, &tv);
if (srv <= 0)
continue;
/* remember the last_lr we searched last time around so that
we don't end up starving any particular listening socket */
if (last_lr == NULL) {
lr = ap_listeners;
}
else {
lr = last_lr->next;
if (!lr)
lr = ap_listeners;
}
first_lr = lr;
do {
apr_os_sock_get(&sockdes, lr->sd);
if (FD_ISSET(sockdes, &main_fds))
goto got_listener;
lr = lr->next;
if (!lr)
lr = ap_listeners;
} while (lr != first_lr);
/* FIXME: if we get here, something bad has happened, and we're
probably gonna spin forever.
*/
continue;
got_listener:
last_lr = lr;
sd = lr->sd;
/* Just got a request on one of the listen sockets so assume that
there are more coming. Set the socket to non-blocking and
move into a fast pull mode. */
apr_setsocketopt(sd, APR_SO_NONBLOCK, 1);
dont_block = 1;
missed_accept = 0;
}
stat = apr_accept(&csd, sd, ptrans);
/* If we got a new socket, set it to non-blocking mode and process
it. Otherwise handle the error. */
if (stat == APR_SUCCESS) {
apr_setsocketopt(csd, APR_SO_NONBLOCK, 0);
break; /* We have a socket ready for reading */
}
else {
switch (APR_TO_NETOS_ERROR(stat)) {
/* if the error is a wouldblock then maybe we were too
quick try to pull the next request from the listen
queue. Try a few more times then return to our idle
listen state. */
case WSAEWOULDBLOCK:
missed_accept++;
would_block++;
apr_thread_yield();
continue;
break;
case WSAECONNRESET:
case WSAETIMEDOUT:
case WSAEHOSTUNREACH:
case WSAENETUNREACH:
break;
case WSAENETDOWN:
/*
* When the network layer has been shut down, there
* is not much use in simply exiting: the parent
* would simply re-create us (and we'd fail again).
* Use the CHILDFATAL code to tear the server down.
* @@@ Martin's idea for possible improvement:
* A different approach would be to define
* a new APEXIT_NETDOWN exit code, the reception
* of which would make the parent shutdown all
* children, then idle-loop until it detected that
* the network is up again, and restart the children.
* Ben Hyde noted that temporary ENETDOWN situations
* occur in mobile IP.
*/
ap_log_error(APLOG_MARK, APLOG_EMERG, stat, ap_server_conf,
"apr_accept: giving up.");
clean_child_exit(APEXIT_CHILDFATAL, my_worker_num);
default:
ap_log_error(APLOG_MARK, APLOG_ERR, stat, ap_server_conf,
"apr_accept: (client socket)");
clean_child_exit(1, my_worker_num);
}
}
}
/* Unlock the mutext so that the next thread can start listening for requests. */
apr_thread_mutex_unlock(accept_mutex);
ap_create_sb_handle(&sbh, ptrans, 0, my_worker_num);
/*
* We now have a connection, so set it up with the appropriate
* socket options, file descriptors, and read/write buffers.
*/
current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd,
my_worker_num, sbh,
bucket_alloc);
if (current_conn) {
ap_process_connection(current_conn, csd);
ap_lingering_close(current_conn);
}
request_count++;
}
clean_child_exit(0, my_worker_num);
}
static int make_child(server_rec *s, int slot)
{
int tid;
int err=0;
NXContext_t ctx;
if (slot + 1 > ap_max_workers_limit) {
ap_max_workers_limit = slot + 1;
}
ap_update_child_status_from_indexes(0, slot, WORKER_STARTING,
(request_rec *) NULL);
if (ctx = NXContextAlloc((void (*)(void *)) worker_main, (void*)slot, NX_PRIO_MED, ap_thread_stack_size, NX_CTX_NORMAL, &err)) {
char threadName[32];
sprintf (threadName, "Apache_Worker %d", slot);
NXContextSetName(ctx, threadName);
err = NXThreadCreate(ctx, NX_THR_BIND_CONTEXT, &tid);
if (err) {
NXContextFree (ctx);
}
}
if (err) {
/* create thread didn't succeed. Fix the scoreboard or else
* it will say SERVER_STARTING forever and ever
*/
ap_update_child_status_from_indexes(0, slot, WORKER_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. */
apr_thread_yield();
return -1;
}
ap_scoreboard_image->servers[0][slot].tid = tid;
return 0;
}
/* start up a bunch of worker threads */
static void startup_workers(int number_to_start)
{
int i;
for (i = 0; number_to_start && i < ap_threads_limit; ++i) {
if (ap_scoreboard_image->servers[0][i].status != WORKER_DEAD) {
continue;
}
if (make_child(ap_server_conf, i) < 0) {
break;
}
--number_to_start;
}
}
/*
* idle_spawn_rate is the number of children that will be spawned on the
* next maintenance cycle if there aren't enough idle servers. It is
* doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
* without the need to spawn.
*/
static int idle_spawn_rate = 1;
#ifndef MAX_SPAWN_RATE
#define MAX_SPAWN_RATE (64)
#endif
static int hold_off_on_exponential_spawning;
static void perform_idle_server_maintenance(apr_pool_t *p)
{
int i;
int to_kill;
int idle_count;
worker_score *ws;
int free_length;
int free_slots[MAX_SPAWN_RATE];
int last_non_dead;
int total_non_dead;
/* initialize the free_list */
free_length = 0;
to_kill = -1;
idle_count = 0;
last_non_dead = -1;
total_non_dead = 0;
for (i = 0; i < ap_threads_limit; ++i) {
int status;
if (i >= ap_max_workers_limit && free_length == idle_spawn_rate)
break;
ws = &ap_scoreboard_image->servers[0][i];
status = ws->status;
if (status == WORKER_DEAD) {
/* try to keep children numbers as low as possible */
if (free_length < idle_spawn_rate) {
free_slots[free_length] = i;
++free_length;
}
}
else if (status == WORKER_IDLE_KILL) {
/* If it is already marked to die, skip it */
continue;
}
else {
/* 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 <= WORKER_READY) {
++ idle_count;
/* always kill the highest numbered child if we have to...
* no really well thought out reason ... other than observing
* the server behaviour under linux where lower numbered children
* tend to service more hits (and hence are more likely to have
* their data in cpu caches).
*/
to_kill = i;
}
++total_non_dead;
last_non_dead = i;
}
}
DBPRINT2("Total: %d Idle Count: %d \r", total_non_dead, idle_count);
ap_max_workers_limit = last_non_dead + 1;
if (idle_count > ap_threads_max_free) {
/* kill off one child... we use the pod because that'll cause it to
* shut down gracefully, in case it happened to pick up a request
* while we were counting
*/
idle_spawn_rate = 1;
ap_update_child_status_from_indexes(0, last_non_dead, WORKER_IDLE_KILL,
(request_rec *) NULL);
DBPRINT1("\nKilling idle thread: %d\n", last_non_dead);
}
else if (idle_count < ap_threads_min_free) {
/* 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, or Min/MaxSpareServers), "
"spawning %d children, there are %d idle, and "
"%d total children", idle_spawn_rate,
idle_count, total_non_dead);
}
DBPRINT0("\n");
for (i = 0; i < free_length; ++i) {
DBPRINT1("Spawning additional thread slot: %d\n", free_slots[i]);
make_child(ap_server_conf, free_slots[i]);
}
/* the next time around we want to spawn twice as many if this
* wasn't good enough, but not if we've just done a graceful
*/
if (hold_off_on_exponential_spawning) {
--hold_off_on_exponential_spawning;
}
else if (idle_spawn_rate < MAX_SPAWN_RATE) {
idle_spawn_rate *= 2;
}
}
}
else {
idle_spawn_rate = 1;
}
}
static void display_settings ()
{
int status_array[SERVER_NUM_STATUS];
int i, status, total=0;
int reqs = request_count;
int skips = skipped_selects;
int wblock = would_block;
request_count = 0;
skipped_selects = 0;
would_block = 0;
ClearScreen (getscreenhandle());
printf("%s \n", ap_get_server_version());
for (i=0;i<SERVER_NUM_STATUS;i++) {
status_array[i] = 0;
}
for (i = 0; i < ap_threads_limit; ++i) {
status = (ap_scoreboard_image->servers[0][i]).status;
status_array[status]++;
}
for (i=0;i<SERVER_NUM_STATUS;i++) {
switch(i)
{
case SERVER_DEAD:
printf ("Available:\t%d\n", status_array[i]);
break;
case SERVER_STARTING:
printf ("Starting:\t%d\n", status_array[i]);
break;
case SERVER_READY:
printf ("Ready:\t\t%d\n", status_array[i]);
break;
case SERVER_BUSY_READ:
printf ("Busy:\t\t%d\n", status_array[i]);
break;
case SERVER_BUSY_WRITE:
printf ("Busy Write:\t%d\n", status_array[i]);
break;
case SERVER_BUSY_KEEPALIVE:
printf ("Busy Keepalive:\t%d\n", status_array[i]);
break;
case SERVER_BUSY_LOG:
printf ("Busy Log:\t%d\n", status_array[i]);
break;
case SERVER_BUSY_DNS:
printf ("Busy DNS:\t%d\n", status_array[i]);
break;
case SERVER_CLOSING:
printf ("Closing:\t%d\n", status_array[i]);
break;
case SERVER_GRACEFUL:
printf ("Restart:\t%d\n", status_array[i]);
break;
case SERVER_IDLE_KILL:
printf ("Idle Kill:\t%d\n", status_array[i]);
break;
default:
printf ("Unknown Status:\t%d\n", status_array[i]);
break;
}
if (i != SERVER_DEAD)
total+=status_array[i];
}
printf ("Total Running:\t%d\tout of: \t%d\n", total, ap_threads_limit);
printf ("Requests per interval:\t%d\n", reqs);
printf ("Skipped selects:\t%d\n", skips);
printf ("Would blocks:\t%d\n", wblock);
}
static void show_server_data()
{
ap_listen_rec *lr;
module **m;
printf("%s\n", ap_get_server_version());
if (ap_my_addrspace && (ap_my_addrspace[0] != 'O') && (ap_my_addrspace[1] != 'S'))
printf(" Running in address space %s\n", ap_my_addrspace);
/* Display listening ports */
printf(" Listening on port(s):");
lr = ap_listeners;
do {
printf(" %d", lr->bind_addr->port);
lr = lr->next;
} while(lr && lr != ap_listeners);
/* Display dynamic modules loaded */
printf("\n");
for (m = ap_loaded_modules; *m != NULL; m++) {
if (((module*)*m)->dynamic_load_handle) {
printf(" Loaded dynamic module %s\n", ((module*)*m)->name);
}
}
}
static int setup_listeners(server_rec *s)
{
ap_listen_rec *lr;
int sockdes;
if (ap_setup_listeners(s) < 1 ) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, 0, s,
"no listening sockets available, shutting down");
return -1;
}
listenmaxfd = -1;
FD_ZERO(&listenfds);
for (lr = ap_listeners; lr; lr = lr->next) {
apr_os_sock_get(&sockdes, lr->sd);
FD_SET(sockdes, &listenfds);
if (sockdes > listenmaxfd) {
listenmaxfd = sockdes;
}
#ifdef NONBLOCK1
apr_setsocketopt(lr->sd, APR_SO_NONBLOCK, 1);
#endif
}
return 0;
}
static int shutdown_listeners()
{
ap_listen_rec *lr;
for (lr = ap_listeners; lr; lr = lr->next) {
apr_socket_close(lr->sd);
}
return 0;
}
/*****************************************************************
* Executive routines.
*/
int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
{
apr_status_t status=0;
pconf = _pconf;
ap_server_conf = s;
if (setup_listeners(s)) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, status, s,
"no listening sockets available, shutting down");
return -1;
}
restart_pending = shutdown_pending = 0;
worker_thread_count = 0;
apr_thread_mutex_create(&worker_thread_count_mutex, APR_THREAD_MUTEX_DEFAULT, pconf);
apr_thread_mutex_create(&accept_mutex, APR_THREAD_MUTEX_DEFAULT, pconf);
if (!is_graceful) {
if (ap_run_pre_mpm(s->process->pool, SB_NOT_SHARED) != OK) {
return 1;
}
}
/* Only set slot 0 since that is all NetWare will ever have. */
ap_scoreboard_image->parent[0].pid = getpid();
set_signals();
apr_pool_create(&pmain, pconf);
ap_run_child_init(pmain, ap_server_conf);
if (ap_threads_max_free < ap_threads_min_free + 1) /* Don't thrash... */
ap_threads_max_free = ap_threads_min_free + 1;
request_count = 0;
startup_workers(ap_threads_to_start);
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());
#ifdef AP_MPM_WANT_SET_ACCEPT_LOCK_MECH
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_DEBUG, 0, ap_server_conf,
"AcceptMutex: %s", ap_valid_accept_mutex_string);
#endif
show_server_data();
while (!restart_pending && !shutdown_pending) {
perform_idle_server_maintenance(pconf);
if (show_settings)
display_settings();
apr_thread_yield();
apr_sleep(SCOREBOARD_MAINTENANCE_INTERVAL);
}
/* Shutdown the listen sockets so that we don't get stuck in a blocking call.
shutdown_listeners();*/
if (shutdown_pending) { /* Got an unload from the console */
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"caught SIGTERM, shutting down");
DBPRINT0 ("Shutdown pending. Waiting for threads to terminate...\n");
while (worker_thread_count > 0)
apr_thread_yield();
return 1;
}
else { /* the only other way out is a restart */
/* 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;
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf,
"Graceful restart requested, doing restart");
/* Wait for all of the threads to terminate before initiating the restart */
DBPRINT0 ("Restart pending. Waiting for threads to terminate...\n");
while (worker_thread_count > 0) {
apr_thread_yield();
}
DBPRINT0 ("restarting...\n");
}
return 0;
}
/* GetCurrentAddressSpace - this should be replaced with the correct header file when available! */
struct _BogusAddressSpace { int a; int b; int c; char name[]; };
typedef struct _BogusAddressSpace BogusAddressSpace;
extern BogusAddressSpace* GetCurrentAddressSpace(void);
/* GetCurrentAddressSpace */
static int netware_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
{
int debug;
BogusAddressSpace *addrspace = NULL;
debug = ap_exists_config_define("DEBUG");
is_graceful = 0;
ap_my_pid = getpid();
addrspace = GetCurrentAddressSpace();
if (addrspace)
ap_my_addrspace = apr_pstrdup (p, addrspace->name);
ap_listen_pre_config();
ap_threads_to_start = DEFAULT_START_THREADS;
ap_threads_min_free = DEFAULT_MIN_FREE_THREADS;
ap_threads_max_free = DEFAULT_MAX_FREE_THREADS;
ap_threads_limit = HARD_THREAD_LIMIT;
ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
ap_extended_status = 0;
return OK;
}
static void netware_mpm_hooks(apr_pool_t *p)
{
ap_hook_pre_config(netware_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
}
void netware_rewrite_args(process_rec *process)
{
char *def_server_root;
char optbuf[3];
const char *opt_arg;
apr_getopt_t *opt;
apr_array_header_t *mpm_new_argv;
atexit (mpm_term);
InstallConsoleHandler();
/* Rewrite process->argv[];
*
* add default -d serverroot from the path of this executable
*
* The end result will look like:
* The -d serverroot default from the running executable
*/
if (process->argc > 0) {
char *s = apr_pstrdup (process->pconf, process->argv[0]);
if (s) {
int i, len = strlen(s);
for (i=len; i; i--) {
if (s[i] == '\\' || s[i] == '/') {
s[i] = NULL;
apr_filepath_merge(&def_server_root, NULL, s,
APR_FILEPATH_TRUENAME, process->pool);
break;
}
}
/* Use process->pool so that the rewritten argv
* lasts for the lifetime of the server process,
* because pconf will be destroyed after the
* initial pre-flight of the config parser.
*/
mpm_new_argv = apr_array_make(process->pool, process->argc + 2,
sizeof(const char *));
*(const char **)apr_array_push(mpm_new_argv) = process->argv[0];
*(const char **)apr_array_push(mpm_new_argv) = "-d";
*(const char **)apr_array_push(mpm_new_argv) = def_server_root;
optbuf[0] = '-';
optbuf[2] = '\0';
apr_getopt_init(&opt, process->pool, process->argc, (char**) process->argv);
while (apr_getopt(opt, AP_SERVER_BASEARGS, optbuf + 1, &opt_arg) == APR_SUCCESS) {
switch (optbuf[1]) {
default:
*(const char **)apr_array_push(mpm_new_argv) =
apr_pstrdup(process->pool, optbuf);
if (opt_arg) {
*(const char **)apr_array_push(mpm_new_argv) = opt_arg;
}
break;
}
}
process->argc = mpm_new_argv->nelts;
process->argv = (const char * const *) mpm_new_argv->elts;
}
}
}
static int CommandLineInterpreter(scr_t screenID, const char *commandLine)
{
char *szCommand = "APACHE2 ";
int iCommandLen = 8;
char szcommandLine[256];
char *pID;
screenID = screenID;
if (commandLine == NULL)
return NOTMYCOMMAND;
if (strlen(commandLine) <= strlen(szCommand))
return NOTMYCOMMAND;
strncpy (szcommandLine, commandLine, sizeof(szcommandLine)-1);
/* All added commands begin with "APACHE2 " */
if (!strnicmp(szCommand, szcommandLine, iCommandLen)) {
ActivateScreen (getscreenhandle());
/* If an instance id was not given but the nlm is loaded in
protected space, then the the command belongs to the
OS address space instance to pass it on. */
pID = strstr (szcommandLine, "-p");
if ((pID == NULL) && nlmisloadedprotected())
return NOTMYCOMMAND;
/* If we got an instance id but it doesn't match this
instance of the nlm, pass it on. */
if (pID && ap_my_addrspace && strnicmp(&pID[2], ap_my_addrspace, strlen(ap_my_addrspace)))
return NOTMYCOMMAND;
/* If we have determined that this command belongs to this
instance of the nlm, then handle it. */
if (!strnicmp("RESTART",&szcommandLine[iCommandLen],3)) {
printf("Restart Requested...\n");
restart();
}
else if (!strnicmp("VERSION",&szcommandLine[iCommandLen],3)) {
printf("Server version: %s\n", ap_get_server_version());
printf("Server built: %s\n", ap_get_server_built());
}
else if (!strnicmp("MODULES",&szcommandLine[iCommandLen],3)) {
ap_show_modules();
}
else if (!strnicmp("DIRECTIVES",&szcommandLine[iCommandLen],3)) {
ap_show_directives();
}
else if (!strnicmp("SHUTDOWN",&szcommandLine[iCommandLen],3)) {
printf("Shutdown Requested...\n");
shutdown_pending = 1;
}
else if (!strnicmp("SETTINGS",&szcommandLine[iCommandLen],3)) {
if (show_settings) {
show_settings = 0;
ClearScreen (getscreenhandle());
show_server_data();
}
else {
show_settings = 1;
display_settings();
}
}
else {
show_settings = 0;
if (!strnicmp("HELP",&szcommandLine[iCommandLen],3))
printf("Unknown APACHE2 command %s\n", &szcommandLine[iCommandLen]);
printf("Usage: APACHE2 [command] [-p <instance ID>]\n");
printf("Commands:\n");
printf("\tDIRECTIVES - Show directives\n");
printf("\tHELP - Display this help information\n");
printf("\tMODULES - Show a list of the loaded modules\n");
printf("\tRESTART - Reread the configurtion file and restart Apache\n");
printf("\tSETTINGS - Show current thread status\n");
printf("\tSHUTDOWN - Shutdown Apache\n");
printf("\tVERSION - Display the server version information\n");
}
/* Tell NetWare we handled the command */
return HANDLEDCOMMAND;
}
/* Tell NetWare that the command isn't mine */
return NOTMYCOMMAND;
}
static int InstallConsoleHandler(void)
{
/* Our command line handler interfaces the system operator
with this NLM */
NX_WRAP_INTERFACE(CommandLineInterpreter, 2, (void*)&(ConsoleHandler.parser));
ConsoleHandler.rTag = AllocateResourceTag(getnlmhandle(), "Command Line Processor",
ConsoleCommandSignature);
if (!ConsoleHandler.rTag)
{
printf("Error on allocate resource tag\n");
return 1;
}
RegisterConsoleCommand(&ConsoleHandler);
/* The Remove procedure unregisters the console handler */
return 0;
}
static void RemoveConsoleHandler(void)
{
UnRegisterConsoleCommand(&ConsoleHandler);
NX_UNWRAP_INTERFACE(ConsoleHandler.parser);
}
static const char *set_threads_to_start(cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_threads_to_start = atoi(arg);
return NULL;
}
static const char *set_min_free_threads(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_min_free = atoi(arg);
if (ap_threads_min_free <= 0) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: detected MinSpareServers 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.");
ap_threads_min_free = 1;
}
return NULL;
}
static const char *set_max_free_threads(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_max_free = atoi(arg);
return NULL;
}
static const char *set_thread_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_threads_limit = atoi(arg);
if (ap_threads_limit > HARD_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: MaxThreads of %d exceeds compile time limit "
"of %d threads,", ap_threads_limit, HARD_THREAD_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" lowering MaxThreads to %d. To increase, please "
"see the", HARD_THREAD_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
" HARD_THREAD_LIMIT define in %s.",
AP_MPM_HARD_LIMITS_FILE);
ap_threads_limit = HARD_THREAD_LIMIT;
}
else if (ap_threads_limit < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"WARNING: Require MaxThreads > 0, setting to 1");
ap_threads_limit = 1;
}
return NULL;
}
static const char *set_thread_stacksize(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_stack_size = atoi(arg);
return NULL;
}
static const command_rec netware_mpm_cmds[] = {
AP_INIT_TAKE1("ThreadStackSize", set_thread_stacksize, NULL, RSRC_CONF,
"Stack size each created thread will use."),
LISTEN_COMMANDS,
AP_INIT_TAKE1("StartThreads", set_threads_to_start, NULL, RSRC_CONF,
"Number of worker threads launched at server startup"),
AP_INIT_TAKE1("MinSpareThreads", set_min_free_threads, NULL, RSRC_CONF,
"Minimum number of idle threads, to handle request spikes"),
AP_INIT_TAKE1("MaxSpareThreads", set_max_free_threads, NULL, RSRC_CONF,
"Maximum number of idle threads"),
AP_INIT_TAKE1("MaxThreads", set_thread_limit, NULL, RSRC_CONF,
"Maximum number of worker threads alive at the same time"),
{ NULL }
};
module AP_MODULE_DECLARE_DATA mpm_netware_module = {
MPM20_MODULE_STUFF,
netware_rewrite_args, /* 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 */
netware_mpm_cmds, /* command apr_table_t */
netware_mpm_hooks, /* register hooks */
};
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