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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
commite8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch)
treeaa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/server/mpm/netware/mpm_netware.c
parentcc40af334e619bb549038238507407866f774f8f (diff)
upload http
JIRA: BOTTLENECK-10 Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/mpm/netware/mpm_netware.c')
-rw-r--r--rubbos/app/httpd-2.0.64/server/mpm/netware/mpm_netware.c1295
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diff --git a/rubbos/app/httpd-2.0.64/server/mpm/netware/mpm_netware.c b/rubbos/app/httpd-2.0.64/server/mpm/netware/mpm_netware.c
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@@ -0,0 +1,1295 @@
+/* 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 */
+};