+++ /dev/null
-/* Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * 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>
-#include <screen.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 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;
-static int mpm_state = AP_MPMQ_STARTING;
-
-/*
- * 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... */
-
-int hold_screen_on_exit = 0; /* Indicates whether the screen should be held open */
-
-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;
-
-/* Keep track of the number of worker threads currently active */
-static unsigned long worker_thread_count;
-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;
-
-//#define DBINFO_ON
-//#define DBPRINT_ON
-#ifdef DBPRINT_ON
-#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
-
-/* 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;
-
-/* a clean exit from a child with proper cleanup */
-static void clean_child_exit(int code, int worker_num, apr_pool_t *ptrans,
- apr_bucket_alloc_t *bucket_alloc) __attribute__ ((noreturn));
-static void clean_child_exit(int code, int worker_num, apr_pool_t *ptrans,
- apr_bucket_alloc_t *bucket_alloc)
-{
- apr_bucket_alloc_destroy(bucket_alloc);
- if (!shutdown_pending) {
- apr_pool_destroy(ptrans);
- }
-
- atomic_dec (&worker_thread_count);
- 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;
- case AP_MPMQ_MPM_STATE:
- *result = mpm_state;
- return APR_SUCCESS;
- }
- return APR_ENOTIMPL;
-}
-
-
-/*****************************************************************
- * Connection structures and accounting...
- */
-
-static void mpm_term(void)
-{
- RemoveConsoleHandler();
- wait_to_finish = 0;
- NXThreadYield();
-}
-
-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(int wait)
-{
- shutdown_pending = 1;
-
- if (wait) {
- while (wait_to_finish) {
- NXThreadYield();
- }
- }
-
- return 0;
-}
-
-/*****************************************************************
- * Child process main loop.
- * The following vars are static to avoid getting clobbered by longjmp();
- * they are really private to child_main.
- */
-
-
-int ap_graceful_stop_signalled(void)
-{
- /* not ever called anymore... */
- return 0;
-}
-
-#define MAX_WB_RETRIES 3
-#ifdef DBINFO_ON
-static int would_block = 0;
-static int retry_success = 0;
-static int retry_fail = 0;
-static int avg_retries = 0;
-#endif
-
-/*static */
-void worker_main(void *arg)
-{
- ap_listen_rec *lr, *first_lr, *last_lr = NULL;
- apr_pool_t *ptrans;
- apr_pool_t *pbucket;
- apr_allocator_t *allocator;
- apr_bucket_alloc_t *bucket_alloc;
- conn_rec *current_conn;
- apr_status_t stat = APR_EINIT;
- ap_sb_handle_t *sbh;
-
- int my_worker_num = (int)arg;
- apr_socket_t *csd = NULL;
- int requests_this_child = 0;
- apr_socket_t *sd = NULL;
- fd_set main_fds;
-
- int sockdes;
- int srv;
- struct timeval tv;
- int wouldblock_retry;
-
- tv.tv_sec = 1;
- tv.tv_usec = 0;
-
- apr_allocator_create(&allocator);
- apr_allocator_max_free_set(allocator, ap_max_mem_free);
-
- apr_pool_create_ex(&ptrans, pmain, NULL, allocator);
- apr_allocator_owner_set(allocator, ptrans);
- apr_pool_tag(ptrans, "transaction");
-
- bucket_alloc = apr_bucket_alloc_create_ex(allocator);
-
- atomic_inc (&worker_thread_count);
-
- 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)) {
- DBPRINT1 ("\n**Thread slot %d is shutting down", my_worker_num);
- clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
- }
-
- ap_update_child_status_from_indexes(0, my_worker_num, WORKER_READY,
- (request_rec *) NULL);
-
- /*
- * Wait for an acceptable connection to arrive.
- */
-
- 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);
- clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
- }
-
- /* 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) {
- if (srv < 0) {
- ap_log_error(APLOG_MARK, APLOG_NOTICE, WSAGetLastError(), ap_server_conf,
- "select() failed on listen socket");
- apr_thread_yield();
- }
- 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);
- /* if we get here, something unexpected happened. Go back
- into the select state and try again.
- */
- continue;
- got_listener:
- last_lr = lr;
- sd = lr->sd;
-
- wouldblock_retry = MAX_WB_RETRIES;
-
- while (wouldblock_retry) {
- if ((stat = apr_accept(&csd, sd, ptrans)) == APR_SUCCESS) {
- break;
- }
- else {
- /* 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. */
- if (!APR_STATUS_IS_EAGAIN(stat)) {
- break;
- }
-
- if (wouldblock_retry--) {
- apr_thread_yield();
- }
- }
- }
-
- /* If we got a new socket, set it to non-blocking mode and process
- it. Otherwise handle the error. */
- if (stat == APR_SUCCESS) {
- apr_socket_opt_set(csd, APR_SO_NONBLOCK, 0);
-#ifdef DBINFO_ON
- if (wouldblock_retry < MAX_WB_RETRIES) {
- retry_success++;
- avg_retries += (MAX_WB_RETRIES-wouldblock_retry);
- }
-#endif
- break; /* We have a socket ready for reading */
- }
- else {
-#ifdef DBINFO_ON
- if (APR_STATUS_IS_EAGAIN(stat)) {
- would_block++;
- retry_fail++;
- }
- else
-#else
- if (APR_STATUS_IS_EAGAIN(stat) ||
-#endif
- APR_STATUS_IS_ECONNRESET(stat) ||
- APR_STATUS_IS_ETIMEDOUT(stat) ||
- APR_STATUS_IS_EHOSTUNREACH(stat) ||
- APR_STATUS_IS_ENETUNREACH(stat)) {
- ;
- }
- else if (APR_STATUS_IS_ENETDOWN(stat)) {
- /*
- * 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, ptrans,
- bucket_alloc);
- }
- else {
- ap_log_error(APLOG_MARK, APLOG_ERR, stat, ap_server_conf,
- "apr_accept: (client socket)");
- clean_child_exit(1, my_worker_num, ptrans, bucket_alloc);
- }
- }
- }
-
- 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, ptrans, bucket_alloc);
-}
-
-
-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_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_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;
-#ifdef DBINFO_ON
- int wblock = would_block;
-
- would_block = 0;
-#endif
-
- request_count = 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);
-
-#ifdef DBINFO_ON
- printf ("Would blocks:\t%d\n", wblock);
- printf ("Successful retries:\t%d\n", retry_success);
- printf ("Failed retries:\t%d\n", retry_fail);
- printf ("Avg retries:\t%d\n", retry_success == 0 ? 0 : avg_retries / retry_success);
-#endif
-}
-
-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_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;
- }
- }
- return 0;
-}
-
-static int shutdown_listeners()
-{
- ap_listen_rec *lr;
-
- for (lr = ap_listeners; lr; lr = lr->next) {
- apr_socket_close(lr->sd);
- }
- ap_listeners = NULL;
- 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_ALERT, status, s,
- "no listening sockets available, shutting down");
- return -1;
- }
-
- restart_pending = shutdown_pending = 0;
- worker_thread_count = 0;
-
- 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);
-
- /* Allow the Apache screen to be closed normally on exit() only if it
- has not been explicitly forced to close on exit(). (ie. the -E flag
- was specified at startup) */
- if (hold_screen_on_exit > 0) {
- hold_screen_on_exit = 0;
- }
-
- ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
- "%s configured -- resuming normal operations",
- ap_get_server_version());
- ap_log_error(APLOG_MARK, 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_DEBUG, 0, ap_server_conf,
- "AcceptMutex: %s (default: %s)",
- apr_proc_mutex_name(accept_mutex),
- apr_proc_mutex_defname());
-#endif
- show_server_data();
-
- mpm_state = AP_MPMQ_RUNNING;
- while (!restart_pending && !shutdown_pending) {
- perform_idle_server_maintenance(pconf);
- if (show_settings)
- display_settings();
- apr_thread_yield();
- apr_sleep(SCOREBOARD_MAINTENANCE_INTERVAL);
- }
- mpm_state = AP_MPMQ_STOPPING;
-
-
- /* 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_NOTICE, 0, ap_server_conf,
- "caught SIGTERM, shutting down");
-
- while (worker_thread_count > 0) {
- printf ("\rShutdown pending. Waiting for %d thread(s) to terminate...",
- worker_thread_count);
- 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_NOTICE, 0, ap_server_conf,
- "Graceful restart requested, doing restart");
-
- /* Wait for all of the threads to terminate before initiating the restart */
- while (worker_thread_count > 0) {
- printf ("\rRestart pending. Waiting for %d thread(s) to terminate...",
- worker_thread_count);
- apr_thread_yield();
- }
- printf ("\nRestarting...\n");
- }
-
- return 0;
-}
-
-static int netware_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
-{
- int debug;
- char *addrname = NULL;
-
- mpm_state = AP_MPMQ_STARTING;
-
- debug = ap_exists_config_define("DEBUG");
-
- is_graceful = 0;
- ap_my_pid = getpid();
- addrname = getaddressspacename (NULL, NULL);
- if (addrname) {
- ap_my_addrspace = apr_pstrdup (p, addrname);
- free (addrname);
- }
-
- 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;
-#ifdef AP_MPM_WANT_SET_MAX_MEM_FREE
- ap_max_mem_free = APR_ALLOCATOR_MAX_FREE_UNLIMITED;
-#endif
-
- 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();
-
- /* Make sure to hold the Apache screen open if exit() is called */
- hold_screen_on_exit = 1;
-
- /* 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] = '\0';
- 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"n:", optbuf + 1, &opt_arg) == APR_SUCCESS) {
- switch (optbuf[1]) {
- case 'n':
- if (opt_arg) {
- renamescreen(opt_arg);
- }
- break;
- case 'E':
- /* Don't need to hold the screen open if the output is going to a file */
- hold_screen_on_exit = -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) {
- pID = &pID[2];
- while (*pID && (*pID == ' '))
- pID++;
- }
- if (pID && ap_my_addrspace && strnicmp(pID, 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 configuration 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, 0, NULL,
- "WARNING: detected MinSpareServers set to non-positive.");
- ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
- "Resetting to 1 to avoid almost certain Apache failure.");
- ap_log_error(APLOG_MARK, APLOG_STARTUP, 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, 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, 0, NULL,
- " lowering MaxThreads to %d. To increase, please "
- "see the", HARD_THREAD_LIMIT);
- ap_log_error(APLOG_MARK, APLOG_STARTUP, 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, 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 */
-};
Code Review / bottlenecks.git / blobdiff