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apache / httpd / trunk / . / server / mpm / motorz / motorz.c
blob: 8feff2965c2957064f5e27f103d60100bb6e7ca5 [file] [log] [blame]
/* 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.
*/
#include "motorz.h"
/**
* config globals
*/
static motorz_core_t *g_motorz_core;
static int threads_per_child = 16;
static int ap_num_kids = DEFAULT_START_DAEMON;
static int thread_limit = MAX_THREAD_LIMIT/10;
/* one_process --- debugging mode variable; can be set from the command line
* with the -X flag. If set, this gets you the child_main loop running
* in the process which originally started up (no detach, no make_child),
* which is a pretty nice debugging environment. (You'll get a SIGHUP
* early in standalone_main; just continue through. This is the server
* trying to kill off any child processes which it might have lying
* around --- Apache doesn't keep track of their pids, it just sends
* SIGHUP to the process group, ignoring it in the root process.
* Continue through and you'll be fine.).
*/
static int one_process = 0;
static apr_pool_t *pconf; /* Pool for config stuff */
static apr_pool_t *pchild; /* Pool for httpd child stuff */
static pid_t ap_my_pid; /* it seems silly to call getpid all the time */
static pid_t parent_pid;
static int my_child_num;
static motorz_child_bucket *all_buckets, /* All listeners buckets */
*my_bucket; /* Current child bucket */
static void clean_child_exit(int code) __attribute__ ((noreturn));
static apr_status_t motorz_io_process(motorz_conn_t *scon);
static void clean_child_exit(int code) __attribute__ ((noreturn));
static apr_pollset_t *motorz_pollset;
static apr_skiplist *motorz_timer_ring;
static motorz_core_t *motorz_core_get(void)
{
return g_motorz_core;
}
static int timer_comp(void *a, void *b)
{
apr_time_t t1 = (apr_time_t) (((motorz_timer_t *) a)->expires);
apr_time_t t2 = (apr_time_t) (((motorz_timer_t *) b)->expires);
AP_DEBUG_ASSERT(t1);
AP_DEBUG_ASSERT(t2);
return ((t1 < t2) ? -1 : 1);
}
static apr_status_t motorz_conn_pool_cleanup(void *baton)
{
motorz_conn_t *scon = (motorz_conn_t *)baton;
if (scon->timer.expires) {
motorz_core_t *mz = scon->mz;
apr_thread_mutex_lock(mz->mtx);
apr_skiplist_remove(mz->timeout_ring, &scon->timer, NULL);
apr_thread_mutex_unlock(mz->mtx);
}
return APR_SUCCESS;
}
static APR_INLINE apr_interval_time_t
motorz_get_timeout(motorz_conn_t *scon)
{
if (scon->c->base_server) {
return scon->c->base_server->timeout;
}
else {
return ap_server_conf->timeout;
}
}
static APR_INLINE apr_interval_time_t
motorz_get_keep_alive_timeout(motorz_conn_t *scon)
{
if (scon->c->base_server) {
return scon->c->base_server->keep_alive_timeout;
}
else {
return ap_server_conf->keep_alive_timeout;
}
}
static void motorz_io_timeout_cb(motorz_core_t *mz, void *baton)
{
motorz_conn_t *scon = (motorz_conn_t *) baton;
conn_rec *c = scon->c;
scon->cs.state = CONN_STATE_LINGER;
ap_lingering_close(c);
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(02842)
"io timeout hit (?) scon: %pp, c: %pp", scon, c);
}
static void *motorz_io_setup_conn(apr_thread_t *thread, void *baton)
{
apr_status_t status;
ap_sb_handle_t *sbh;
long conn_id = 0;
motorz_sb_t *sb;
motorz_conn_t *scon = (motorz_conn_t *) baton;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03316)
"motorz_io_setup_conn(): entered");
ap_create_sb_handle(&sbh, scon->pool, 0, 0);
scon->sbh = sbh;
scon->ba = apr_bucket_alloc_create(scon->pool);
scon->c = ap_run_create_connection(scon->pool, ap_server_conf, scon->sock,
conn_id, sbh, scon->ba);
/* XXX: handle failure */
scon->c->cs = &scon->cs;
sb = apr_pcalloc(scon->pool, sizeof(motorz_sb_t));
scon->c->current_thread = thread;
scon->pfd.p = scon->pool;
scon->pfd.desc_type = APR_POLL_SOCKET;
scon->pfd.desc.s = scon->sock;
scon->pfd.reqevents = APR_POLLIN;
sb->type = PT_CSD;
sb->baton = scon;
scon->pfd.client_data = sb;
ap_update_vhost_given_ip(scon->c);
status = ap_pre_connection(scon->c, scon->sock);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03317)
"motorz_io_setup_conn(): did pre-conn");
if (status != OK && status != DONE) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02843)
"motorz_io_setup_conn: connection aborted");
}
scon->cs.state = CONN_STATE_PROCESSING;
scon->cs.sense = CONN_SENSE_DEFAULT;
status = motorz_io_process(scon);
if (1) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, status, ap_server_conf, APLOGNO(02844)
"motorz_io_setup_conn: motorz_io_process status: %d", (int)status);
}
return NULL;
}
static apr_status_t motorz_io_user(motorz_core_t *mz, motorz_sb_t *sb)
{
/* TODO */
return APR_SUCCESS;
}
static apr_status_t motorz_io_accept(motorz_core_t *mz, motorz_sb_t *sb)
{
apr_status_t rv;
apr_pool_t *ptrans;
apr_socket_t *socket;
ap_listen_rec *lr = (ap_listen_rec *) sb->baton;
apr_allocator_t *allocator;
apr_allocator_create(&allocator);
apr_allocator_max_free_set(allocator, ap_max_mem_free);
apr_pool_create_ex(&ptrans, pconf, NULL, allocator);
apr_allocator_owner_set(allocator, ptrans);
apr_pool_tag(ptrans, "transaction");
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03318)
"motorz_io_accept(): entered");
rv = lr->accept_func((void *)&socket, lr, ptrans);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(02845)
"motorz_io_accept failed");
clean_child_exit(APEXIT_CHILDSICK);
}
else if (ap_accept_error_is_nonfatal(rv)) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf,
"accept() on client socket failed");
}
else {
motorz_conn_t *scon = apr_pcalloc(ptrans, sizeof(motorz_conn_t));
scon->pool = ptrans;
scon->sock = socket;
scon->mz = mz;
apr_pool_cleanup_register(scon->pool, scon, motorz_conn_pool_cleanup,
apr_pool_cleanup_null);
rv = apr_thread_pool_push(mz->workers,
motorz_io_setup_conn,
scon,
APR_THREAD_TASK_PRIORITY_HIGHEST, NULL);
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(03319)
"motorz_io_accept(): exited: %d", (int)rv);
return rv;
}
static void *motorz_timer_invoke(apr_thread_t *thread, void *baton)
{
motorz_timer_t *ep = (motorz_timer_t *)baton;
motorz_conn_t *scon = (motorz_conn_t *)ep->baton;
scon->c->current_thread = thread;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03320)
"motorz_timer_invoke(): entered");
ep->cb(ep->mz, ep->baton);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03321)
"motorz_timer_invoke(): exited");
return NULL;
}
static apr_status_t motorz_timer_event_process(motorz_core_t *mz, motorz_timer_t *te)
{
motorz_conn_t *scon = (motorz_conn_t *)te->baton;
scon->timer.expires = 0;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03322)
"motorz_timer_event_process(): entered");
return apr_thread_pool_push(mz->workers,
motorz_timer_invoke,
te, APR_THREAD_TASK_PRIORITY_NORMAL, NULL);
}
static void *motorz_io_invoke(apr_thread_t *thread, void *baton)
{
motorz_sb_t *sb = (motorz_sb_t *) baton;
motorz_conn_t *scon = (motorz_conn_t *) sb->baton;
apr_status_t rv;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03323)
"motorz_io_invoke(): entered");
scon->c->current_thread = thread;
rv = motorz_io_process(scon);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(02846)
"motorz_io_invoke: motorz_io_process failed (?)");
}
return NULL;
}
static apr_status_t motorz_io_event_process(motorz_core_t *mz, motorz_sb_t *sb)
{
return apr_thread_pool_push(mz->workers,
motorz_io_invoke,
sb, APR_THREAD_TASK_PRIORITY_NORMAL, NULL);
}
static apr_status_t motorz_io_callback(void *baton, const apr_pollfd_t *pfd)
{
apr_status_t status = APR_SUCCESS;
motorz_core_t *mz = (motorz_core_t *) baton;
motorz_sb_t *sb = pfd->client_data;
if (sb->type == PT_ACCEPT) {
status = motorz_io_accept(mz, sb);
}
else if (sb->type == PT_CSD) {
status = motorz_io_event_process(mz, sb);
}
else if (sb->type == PT_USER) {
status = motorz_io_user(mz, sb);
}
return status;
}
static void motorz_register_timeout(motorz_conn_t *scon,
motorz_timer_cb cb,
apr_interval_time_t relative_time)
{
apr_time_t t = apr_time_now() + relative_time;
motorz_timer_t *elem = &scon->timer;
motorz_core_t *mz = scon->mz;
elem->expires = t;
elem->cb = cb;
elem->baton = scon;
elem->pool = scon->pool;
elem->mz = mz;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03324)
"motorz_register_timer(): insert ELEM: %pp", elem);
apr_thread_mutex_lock(mz->mtx);
#ifdef AP_DEBUG
ap_assert(apr_skiplist_insert(mz->timeout_ring, elem));
#else
apr_skiplist_insert(mz->timeout_ring, elem);
#endif
apr_thread_mutex_unlock(mz->mtx);
}
static apr_status_t motorz_io_process(motorz_conn_t *scon)
{
apr_status_t rv;
motorz_core_t *mz;
conn_rec *c;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03325)
"motorz_io_process(): entered");
if (scon->c->clogging_input_filters && !scon->c->aborted) {
/* Since we have an input filter which 'clogs' the input stream,
* like mod_ssl used to, lets just do the normal read from input
* filters, like the Worker MPM does. Filters that need to write
* where they would otherwise read, or read where they would
* otherwise write, should set the sense appropriately.
*/
ap_run_process_connection(scon->c);
if (scon->cs.state != CONN_STATE_SUSPENDED) {
scon->cs.state = CONN_STATE_LINGER;
}
}
mz = scon->mz;
c = scon->c;
if (!c->aborted) {
if (scon->pfd.reqevents != 0) {
/*
* Some of the pollset backends, like KQueue or Epoll
* automagically remove the FD if the socket is closed,
* therefore, we can accept _SUCCESS or _NOTFOUND,
* and we still want to keep going
*/
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03326)
"motorz_io_process(): apr_pollset_remove");
rv = apr_pollset_remove(mz->pollset, &scon->pfd);
if (rv != APR_SUCCESS && !APR_STATUS_IS_NOTFOUND(rv)) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(02847)
"motorz_io_process: apr_pollset_remove failure");
/*AP_DEBUG_ASSERT(rv == APR_SUCCESS);*/
}
scon->pfd.reqevents = 0;
}
if (scon->cs.state == CONN_STATE_KEEPALIVE) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03327)
"motorz_io_process(): Set to CONN_STATE_PROCESSING");
scon->cs.state = CONN_STATE_PROCESSING;
}
read_request:
if (scon->cs.state == CONN_STATE_PROCESSING) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03328)
"motorz_io_process(): CONN_STATE_PROCESSING");
if (!c->aborted) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03329)
"motorz_io_process(): !aborted");
ap_run_process_connection(c);
/* state will be updated upon return
* fall thru to either wait for readability/timeout or
* do lingering close
*/
}
else {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03330)
"motorz_io_process(): aborted");
scon->cs.state = CONN_STATE_LINGER;
}
}
if (scon->cs.state == CONN_STATE_WRITE_COMPLETION) {
int pending;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03331)
"motorz_io_process(): CONN_STATE_WRITE_COMPLETION");
ap_update_child_status(scon->sbh, SERVER_BUSY_WRITE, NULL);
pending = ap_run_output_pending(c);
if (pending == OK) {
/* Still in WRITE_COMPLETION_STATE:
* Set a write timeout for this connection, and let the
* event thread poll for writeability.
*/
motorz_register_timeout(scon,
motorz_io_timeout_cb,
motorz_get_timeout(scon));
scon->pfd.reqevents = (
scon->cs.sense == CONN_SENSE_WANT_READ ? APR_POLLIN :
APR_POLLOUT) | APR_POLLHUP | APR_POLLERR;
scon->cs.sense = CONN_SENSE_DEFAULT;
rv = apr_pollset_add(mz->pollset, &scon->pfd);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_WARNING, rv,
ap_server_conf, APLOGNO(02849)
"apr_pollset_add: failed in write completion");
}
return APR_SUCCESS;
}
if (pending != DECLINED
|| c->keepalive != AP_CONN_KEEPALIVE
|| c->aborted) {
scon->cs.state = CONN_STATE_LINGER;
}
else if (ap_run_input_pending(c) == OK) {
scon->cs.state = CONN_STATE_PROCESSING;
goto read_request;
}
else {
scon->cs.state = CONN_STATE_KEEPALIVE;
}
}
if (scon->cs.state == CONN_STATE_LINGER) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03332)
"motorz_io_process(): CONN_STATE_LINGER");
ap_lingering_close(c);
}
if (scon->cs.state == CONN_STATE_KEEPALIVE) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03333)
"motorz_io_process(): CONN_STATE_KEEPALIVE");
motorz_register_timeout(scon,
motorz_io_timeout_cb,
motorz_get_keep_alive_timeout(scon));
scon->pfd.reqevents = APR_POLLIN | APR_POLLHUP | APR_POLLERR;
scon->cs.sense = CONN_SENSE_DEFAULT;
rv = apr_pollset_add(mz->pollset, &scon->pfd);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(02850)
"process_socket: apr_pollset_add failure in read request line");
return rv;
}
}
} else {
ap_lingering_close(c);
}
return APR_SUCCESS;
}
static apr_status_t motorz_pollset_cb(motorz_core_t *mz, apr_interval_time_t timeout)
{
apr_status_t rc;
const apr_pollfd_t *out_pfd = NULL;
apr_int32_t num = 0;
rc = apr_pollset_poll(mz->pollset, timeout, &num, &out_pfd);
if (rc != APR_SUCCESS) {
if (APR_STATUS_IS_EINTR(rc) || APR_STATUS_IS_TIMEUP(rc)) {
return APR_SUCCESS;
} else {
return rc;
}
}
while (num > 0) {
rc = motorz_io_callback(mz, out_pfd);
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL, APLOGNO(03334)
"Call to motorz_io_callback() failed");
}
out_pfd++;
num--;
}
return APR_SUCCESS;
}
/**
* Create worker thread pool.
*/
static apr_status_t motorz_setup_workers(motorz_core_t *mz)
{
apr_status_t rv;
rv = apr_thread_pool_create(&mz->workers,
threads_per_child,
threads_per_child, mz->pool);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(02851)
"motorz_setup_workers: apr_thread_pool_create with %d threads failed",
threads_per_child);
return rv;
}
return APR_SUCCESS;
}
static int motorz_setup_pollset(motorz_core_t *mz)
{
int i;
apr_status_t rv;
int good_methods[] = {APR_POLLSET_KQUEUE, APR_POLLSET_PORT, APR_POLLSET_EPOLL};
for (i = 0; i < sizeof(good_methods) / sizeof(good_methods[0]); i++) {
rv = apr_pollset_create_ex(&mz->pollset,
512,
mz->pool,
APR_POLLSET_NODEFAULT,
good_methods[i]);
if (rv == APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(02852)
"motorz_setup_pollset: apr_pollset_create_ex using %s", apr_pollset_method_name(mz->pollset));
break;
}
}
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_INFO, rv, ap_server_conf, APLOGNO(02853)
"motorz_setup_pollset: apr_pollset_create_ex failed for all possible backends!");
rv = apr_pollset_create(&mz->pollset,
512,
mz->pool,
0);
}
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(02854)
"motorz_setup_pollset: apr_pollset_create failed for all possible backends!");
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03335)
"motorz_setup_pollset: Using %s", apr_pollset_method_name(mz->pollset));
return rv;
}
static void motorz_note_child_killed(int childnum, pid_t pid,
ap_generation_t gen)
{
AP_DEBUG_ASSERT(childnum != -1); /* no scoreboard squatting with this MPM */
ap_run_child_status(ap_server_conf,
ap_scoreboard_image->parent[childnum].pid,
ap_scoreboard_image->parent[childnum].generation,
childnum, MPM_CHILD_EXITED);
ap_scoreboard_image->parent[childnum].pid = 0;
}
static void motorz_note_child_started(motorz_core_t *mz, int slot, pid_t pid)
{
ap_generation_t gen = mz->mpm->my_generation;
ap_scoreboard_image->parent[slot].pid = pid;
ap_scoreboard_image->parent[slot].generation = gen;
ap_run_child_status(ap_server_conf, pid, gen, slot, MPM_CHILD_STARTED);
}
/* a clean exit from a child with proper cleanup */
static void clean_child_exit(int code)
{
motorz_core_t *mz = motorz_core_get();
mz->mpm->mpm_state = AP_MPMQ_STOPPING;
apr_signal(SIGHUP, SIG_IGN);
apr_signal(SIGTERM, SIG_IGN);
if (pchild) {
apr_pool_destroy(pchild);
}
if (one_process) {
motorz_note_child_killed(/* slot */ 0, 0, 0);
}
ap_mpm_pod_close(my_bucket->pod);
exit(code);
}
#if 0 /* unused for now */
static apr_status_t accept_mutex_on(void)
{
motorz_core_t *mz = motorz_core_get();
apr_status_t rv = apr_proc_mutex_lock(my_bucket->mutex);
if (rv != APR_SUCCESS) {
const char *msg = "couldn't grab the accept mutex";
if (mz->mpm->my_generation !=
ap_scoreboard_image->global->running_generation) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(02855) "%s", msg);
clean_child_exit(0);
}
else {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(02856) "%s", msg);
exit(APEXIT_CHILDFATAL);
}
}
return APR_SUCCESS;
}
static apr_status_t accept_mutex_off(void)
{
motorz_core_t *mz = motorz_core_get();
apr_status_t rv = apr_proc_mutex_unlock(my_bucket->mutex);
if (rv != APR_SUCCESS) {
const char *msg = "couldn't release the accept mutex";
if (mz->mpm->my_generation !=
ap_scoreboard_image->global->running_generation) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(02857) "%s", msg);
/* don't exit here... we have a connection to
* process, after which point we'll see that the
* generation changed and we'll exit cleanly
*/
}
else {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(02858) "%s", msg);
exit(APEXIT_CHILDFATAL);
}
}
return APR_SUCCESS;
}
#endif
/* On some architectures it's safe to do unserialized accept()s in the single
* Listen case. But it's never safe to do it in the case where there's
* multiple Listen statements. Define SINGLE_LISTEN_UNSERIALIZED_ACCEPT
* when it's safe in the single Listen case.
*/
#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
#define SAFE_ACCEPT(stmt) (ap_listeners->next ? (stmt) : APR_SUCCESS)
#else
#define SAFE_ACCEPT(stmt) (stmt)
#endif
static int motorz_query(int query_code, int *result, apr_status_t *rv)
{
motorz_core_t *mz = motorz_core_get();
*rv = APR_SUCCESS;
switch(query_code){
case AP_MPMQ_IS_ASYNC:
*result = 1;
break;
case AP_MPMQ_MAX_DAEMON_USED:
*result = ap_num_kids;
break;
case AP_MPMQ_IS_THREADED:
*result = AP_MPMQ_STATIC;
break;
case AP_MPMQ_IS_FORKED:
*result = AP_MPMQ_STATIC;
break;
case AP_MPMQ_HARD_LIMIT_DAEMONS:
*result = ap_num_kids;
break;
case AP_MPMQ_HARD_LIMIT_THREADS:
*result = thread_limit;
break;
case AP_MPMQ_MAX_THREADS:
*result = threads_per_child;
break;
case AP_MPMQ_MIN_SPARE_DAEMONS:
*result = 0;
break;
case AP_MPMQ_MIN_SPARE_THREADS:
*result = 0;
break;
case AP_MPMQ_MAX_SPARE_DAEMONS:
*result = ap_num_kids;
break;
case AP_MPMQ_MAX_SPARE_THREADS:
*result = 0;
break;
case AP_MPMQ_MAX_REQUESTS_DAEMON:
*result = 0;
break;
case AP_MPMQ_MAX_DAEMONS:
*result = ap_num_kids;
break;
case AP_MPMQ_MPM_STATE:
*result = mz->mpm->mpm_state;
break;
case AP_MPMQ_GENERATION:
*result = mz->mpm->my_generation;
break;
default:
*rv = APR_ENOTIMPL;
break;
}
return OK;
}
static const char *motorz_get_name(void)
{
return "motorz";
}
/*****************************************************************
* Connection structures and accounting...
*/
static void just_die(int sig)
{
clean_child_exit(0);
}
/* volatile because it's updated from a signal handler */
static int volatile die_now = 0;
static void stop_listening(int sig)
{
motorz_core_t *mz = motorz_core_get();
mz->mpm->mpm_state = AP_MPMQ_STOPPING;
ap_close_listeners_ex(my_bucket->listeners);
/* For a graceful stop, we want the child to exit when done */
die_now = 1;
}
/*****************************************************************
* Child process main loop.
* The following vars are static to avoid getting clobbered by longjmp();
* they are really private to child_main.
*/
static int requests_this_child;
static int num_listensocks = 0;
static void child_main(motorz_core_t *mz, int child_num_arg, int child_bucket)
{
#if APR_HAS_THREADS
apr_thread_t *thd = NULL;
apr_os_thread_t osthd;
#endif
apr_status_t status;
int i;
ap_listen_rec *lr;
ap_sb_handle_t *sbh;
const char *lockfile;
/* for benefit of any hooks that run as this child initializes */
mz->mpm->mpm_state = AP_MPMQ_STARTING;
my_child_num = child_num_arg;
ap_my_pid = getpid();
requests_this_child = 0;
ap_fatal_signal_child_setup(ap_server_conf);
/* Get a sub context for global allocations in this child, so that
* we can have cleanups occur when the child exits.
*/
apr_pool_create(&pchild, pconf);
apr_pool_tag(pchild, "pchild");
#if APR_HAS_THREADS
osthd = apr_os_thread_current();
apr_os_thread_put(&thd, &osthd, pchild);
#endif
/* close unused listeners and pods */
for (i = 0; i < mz->mpm->num_buckets; i++) {
if (i != child_bucket) {
ap_close_listeners_ex(all_buckets[i].listeners);
ap_mpm_pod_close(all_buckets[i].pod);
}
}
/* needs to be done before we switch UIDs so we have permissions */
ap_reopen_scoreboard(pchild, NULL, 0);
status = SAFE_ACCEPT(apr_proc_mutex_child_init(&my_bucket->mutex,
apr_proc_mutex_lockfile(my_bucket->mutex),
pchild));
if (status != APR_SUCCESS) {
lockfile = apr_proc_mutex_lockfile(my_bucket->mutex);
ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(02867)
"Couldn't initialize cross-process lock in child "
"(%s) (%s)",
lockfile ? lockfile : "none",
apr_proc_mutex_name(my_bucket->mutex));
clean_child_exit(APEXIT_CHILDFATAL);
}
if (ap_run_drop_privileges(pchild, ap_server_conf)) {
clean_child_exit(APEXIT_CHILDFATAL);
}
ap_run_child_init(pchild, ap_server_conf);
ap_create_sb_handle(&sbh, pchild, my_child_num, 0);
ap_update_child_status(sbh, SERVER_READY, NULL);
apr_skiplist_init(&mz->timeout_ring, mz->pool);
apr_skiplist_set_compare(mz->timeout_ring, timer_comp, timer_comp);
status = motorz_setup_workers(mz);
if (status != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, status, ap_server_conf, APLOGNO(02868)
"child_main: motorz_setup_workers failed");
clean_child_exit(APEXIT_CHILDSICK);
}
status = motorz_setup_pollset(mz);
if (status != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(02869)
"Couldn't setup pollset in child; check system or user limits");
clean_child_exit(APEXIT_CHILDSICK); /* assume temporary resource issue */
}
for (lr = my_bucket->listeners, i = num_listensocks; i--; lr = lr->next) {
apr_pollfd_t *pfd = apr_pcalloc(mz->pool, sizeof *pfd);
motorz_sb_t *sb = apr_pcalloc(mz->pool, sizeof(motorz_sb_t));
pfd->desc_type = APR_POLL_SOCKET;
pfd->desc.s = lr->sd;
pfd->reqevents = APR_POLLIN;
pfd->p = mz->pool;
pfd->client_data = sb;
sb->type = PT_ACCEPT;
sb->baton = lr;
status = apr_socket_opt_set(pfd->desc.s, APR_SO_NONBLOCK, 1);
if (status != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL, APLOGNO(02870)
"apr_socket_opt_set(APR_SO_NONBLOCK = 1) failed on %pI",
lr->bind_addr);
clean_child_exit(0);
}
status = apr_pollset_add(mz->pollset, pfd);
if (status != APR_SUCCESS) {
/* If the child processed a SIGWINCH before setting up the
* pollset, this error path is expected and harmless,
* since the listener fd was already closed; so don't
* pollute the logs in that case. */
if (!die_now) {
ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(02871)
"Couldn't add listener to pollset; check system or user limits");
clean_child_exit(APEXIT_CHILDSICK);
}
clean_child_exit(0);
}
lr->accept_func = ap_unixd_accept;
}
mz->mpm->mpm_state = AP_MPMQ_RUNNING;
/* die_now is set when AP_SIG_GRACEFUL is received in the child;
* {shutdown,restart}_pending are set when a signal is received while
* running in single process mode.
*/
while (!die_now
&& !mz->mpm->shutdown_pending
&& !mz->mpm->restart_pending) {
/*
* (Re)initialize this child to a pre-connection state.
*/
if ((ap_max_requests_per_child > 0
&& requests_this_child++ >= ap_max_requests_per_child)) {
clean_child_exit(0);
}
ap_update_child_status(sbh, SERVER_READY, NULL);
{
apr_time_t tnow = apr_time_now();
motorz_timer_t *te;
apr_interval_time_t timeout = apr_time_from_msec(500);
apr_thread_mutex_lock(mz->mtx);
te = apr_skiplist_peek(mz->timeout_ring);
if (te) {
if (tnow < te->expires) {
timeout = (te->expires - tnow);
if (timeout > apr_time_from_msec(500)) {
timeout = apr_time_from_msec(500);
}
}
else {
timeout = 0;
}
}
apr_thread_mutex_unlock(mz->mtx);
status = motorz_pollset_cb(mz, timeout);
tnow = apr_time_now();
if (status != APR_SUCCESS) {
if (!APR_STATUS_IS_EINTR(status) && !APR_STATUS_IS_TIMEUP(status)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL, APLOGNO(03117)
"motorz_main_loop: apr_pollcb_poll failed");
clean_child_exit(0);
}
}
apr_thread_mutex_lock(mz->mtx);
/* now iterate any timers and push to worker pool */
while (te && te->expires < tnow) {
apr_skiplist_pop(mz->timeout_ring, NULL);
motorz_timer_event_process(mz, te);
te = apr_skiplist_peek(mz->timeout_ring);
}
apr_thread_mutex_unlock(mz->mtx);
}
if (ap_mpm_pod_check(my_bucket->pod) == APR_SUCCESS) { /* selected as idle? */
die_now = 1;
}
else if (mz->mpm->my_generation !=
ap_scoreboard_image->global->running_generation) { /* restart? */
/* yeah, this could be non-graceful restart, in which case the
* parent will kill us soon enough, but why bother checking?
*/
die_now = 1;
}
}
clean_child_exit(0);
}
static int make_child(motorz_core_t *mz, server_rec *s, int slot)
{
int bucket = slot % mz->mpm->num_buckets;
int pid;
if (slot + 1 > mz->max_daemons_limit) {
mz->max_daemons_limit = slot + 1;
}
if (one_process) {
my_bucket = &all_buckets[0];
motorz_note_child_started(mz, slot, getpid());
child_main(mz, slot, 0);
/* NOTREACHED */
ap_assert(0);
return -1;
}
ap_update_child_status_from_indexes(slot, 0, SERVER_STARTING, NULL);
if ((pid = fork()) == -1) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, APLOGNO(02872) "fork: Unable to fork new process");
/* fork didn't succeed. Fix the scoreboard or else
* it will say SERVER_STARTING forever and ever
*/
ap_update_child_status_from_indexes(slot, 0, SERVER_DEAD, NULL);
/* In case system resources are maxxed out, we don't want
* Apache running away with the CPU trying to fork over and
* over and over again.
*/
sleep(10);
return -1;
}
if (!pid) {
my_bucket = &all_buckets[bucket];
#ifdef HAVE_BINDPROCESSOR
/* by default AIX binds to a single processor
* this bit unbinds children which will then bind to another cpu
*/
int status = bindprocessor(BINDPROCESS, (int)getpid(),
PROCESSOR_CLASS_ANY);
if (status != OK) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, errno,
ap_server_conf, APLOGNO(02873) "processor unbind failed");
}
#endif
RAISE_SIGSTOP(MAKE_CHILD);
AP_MONCONTROL(1);
/* Disable the parent's signal handlers and set up proper handling in
* the child.
*/
apr_signal(SIGHUP, just_die);
apr_signal(SIGTERM, just_die);
/* Ignore SIGINT in child. This fixes race-condition in signals
* handling when httpd is running on foreground and user hits ctrl+c.
* In this case, SIGINT is sent to all children followed by SIGTERM
* from the main process, which interrupts the SIGINT handler and
* leads to inconsistency.
*/
apr_signal(SIGINT, SIG_IGN);
/* The child process just closes listeners on AP_SIG_GRACEFUL.
* The pod is used for signalling the graceful restart.
*/
apr_signal(AP_SIG_GRACEFUL, stop_listening);
child_main(mz, slot, bucket);
}
motorz_note_child_started(mz, slot, pid);
return 0;
}
/* start up a bunch of children */
static void startup_children(motorz_core_t *mz, int number_to_start)
{
int i;
for (i = 0; number_to_start && i < ap_num_kids; ++i) {
if (ap_scoreboard_image->servers[i][0].status != SERVER_DEAD) {
continue;
}
if (make_child(mz, ap_server_conf, i) < 0) {
break;
}
--number_to_start;
}
}
static void perform_idle_server_maintenance(motorz_core_t *mz, apr_pool_t *p)
{
int free_length;
int free_slots[1];
int i;
worker_score *ws;
int active = 0;
free_length = 0;
free_slots[0] = 0;
for (i = 0; i < ap_num_kids; ++i) {
int status;
ws = &ap_scoreboard_image->servers[i][0];
status = ws->status;
if (status == SERVER_DEAD && !free_length) {
free_slots[free_length] = i;
free_length++;
}
if (status >= SERVER_READY) {
active++;
}
}
if (active > ap_num_kids) {
static int bucket_kill_child_record = -1;
/* 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
*/
bucket_kill_child_record = (bucket_kill_child_record + 1) % mz->mpm->num_buckets;
ap_mpm_pod_signal(all_buckets[bucket_kill_child_record].pod);
}
else if (active < ap_num_kids) {
make_child(mz, ap_server_conf, free_slots[0]);
}
}
/*****************************************************************
* Executive routines.
*/
static int motorz_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
{
int index;
int remaining_children_to_start;
int i;
motorz_core_t *mz = motorz_core_get();
ap_log_pid(pconf, ap_pid_fname);
if (!mz->mpm->was_graceful) {
if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
mz->mpm->mpm_state = AP_MPMQ_STOPPING;
return !OK;
}
/* fix the generation number in the global score; we just got a new,
* cleared scoreboard
*/
ap_scoreboard_image->global->running_generation = mz->mpm->my_generation;
}
ap_unixd_mpm_set_signals(pconf, one_process);
if (one_process) {
AP_MONCONTROL(1);
make_child(mz, ap_server_conf, 0);
/* NOTREACHED */
ap_assert(0);
return !OK;
}
/* Don't thrash since num_buckets depends on the
* system and the number of online CPU cores...
*/
if (ap_num_kids < mz->mpm->num_buckets)
ap_num_kids = mz->mpm->num_buckets;
/* If we're doing a graceful_restart then we're going to see a lot
* of children exiting immediately when we get into the main loop
* below (because we just sent them AP_SIG_GRACEFUL). This happens pretty
* rapidly... and for each one that exits we'll start a new one until
* we reach at least daemons_min_free. But we may be permitted to
* start more than that, so we'll just keep track of how many we're
* supposed to start up without the 1 second penalty between each fork.
*/
remaining_children_to_start = ap_num_kids;
if (!mz->mpm->was_graceful) {
startup_children(mz, remaining_children_to_start);
remaining_children_to_start = 0;
}
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(02874)
"%s configured -- resuming normal operations",
ap_get_server_description());
ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(02875)
"Server built: %s", ap_get_server_built());
ap_log_command_line(plog, s);
ap_log_mpm_common(s);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02876)
"Accept mutex: %s (default: %s)",
(all_buckets[0].mutex)
? apr_proc_mutex_name(all_buckets[0].mutex)
: "none",
apr_proc_mutex_defname());
mz->mpm->mpm_state = AP_MPMQ_RUNNING;
while (!mz->mpm->restart_pending && !mz->mpm->shutdown_pending) {
int child_slot;
apr_exit_why_e exitwhy;
int status, processed_status;
/* this is a memory leak, but I'll fix it later. */
apr_proc_t pid;
ap_wait_or_timeout(&exitwhy, &status, &pid, pconf, ap_server_conf);
/* XXX: if it takes longer than 1 second for all our children
* to start up and get into IDLE state then we may spawn an
* extra child
*/
if (pid.pid != -1) {
processed_status = ap_process_child_status(&pid, exitwhy, status);
child_slot = ap_find_child_by_pid(&pid);
if (processed_status == APEXIT_CHILDFATAL) {
/* fix race condition found in PR 39311
* A child created at the same time as a graceful happens
* can find the lock missing and create a fatal error.
* It is not fatal for the last generation to be in this state.
*/
if (child_slot < 0
|| ap_get_scoreboard_process(child_slot)->generation
== mz->mpm->my_generation) {
mz->mpm->mpm_state = AP_MPMQ_STOPPING;
return !OK;
}
else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(02877)
"Ignoring fatal error in child of previous "
"generation (pid %ld).",
(long)pid.pid);
}
}
/* non-fatal death... note that it's gone in the scoreboard. */
if (child_slot >= 0) {
ap_update_child_status_from_indexes(child_slot, 0,
SERVER_DEAD, NULL);
motorz_note_child_killed(child_slot, 0, 0);
if (remaining_children_to_start
&& child_slot < ap_num_kids) {
/* we're still doing a 1-for-1 replacement of dead
* children with new children
*/
make_child(mz, ap_server_conf, child_slot);
--remaining_children_to_start;
}
#if APR_HAS_OTHER_CHILD
}
else if (apr_proc_other_child_alert(&pid, APR_OC_REASON_DEATH, status) == APR_SUCCESS) {
/* handled */
#endif
}
else if (mz->mpm->was_graceful) {
/* Great, we've probably just lost a slot in the
* scoreboard. Somehow we don't know about this
* child.
*/
ap_log_error(APLOG_MARK, APLOG_WARNING,
0, ap_server_conf, APLOGNO(02878)
"long lost child came home! (pid %ld)", (long)pid.pid);
}
/* Don't perform idle maintenance when a child dies,
* only do it when there's a timeout. Remember only a
* finite number of children can die, and it's pretty
* pathological for a lot to die suddenly.
*/
continue;
}
else if (remaining_children_to_start) {
/* we hit a 1 second timeout in which none of the previous
* generation of children needed to be reaped... so assume
* they're all done, and pick up the slack if any is left.
*/
startup_children(mz, remaining_children_to_start);
remaining_children_to_start = 0;
/* In any event we really shouldn't do the code below because
* few of the servers we just started are in the IDLE state
* yet, so we'd mistakenly create an extra server.
*/
continue;
}
perform_idle_server_maintenance(mz, pconf);
}
mz->mpm->mpm_state = AP_MPMQ_STOPPING;
if (mz->mpm->shutdown_pending && mz->mpm->is_ungraceful) {
/* Time to shut down:
* Kill child processes, tell them to call child_exit, etc...
*/
if (ap_unixd_killpg(getpgrp(), SIGTERM) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(02879) "killpg SIGTERM");
}
ap_reclaim_child_processes(1, /* Start with SIGTERM */
motorz_note_child_killed);
/* cleanup pid file on normal shutdown */
ap_remove_pid(pconf, ap_pid_fname);
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(02880)
"caught SIGTERM, shutting down");
return DONE;
}
if (mz->mpm->shutdown_pending) {
/* Time to perform a graceful shut down:
* Reap the inactive children, and ask the active ones
* to close their listeners, then wait until they are
* all done to exit.
*/
int active_children;
apr_time_t cutoff = 0;
/* Stop listening */
ap_close_listeners();
/* kill off the idle ones */
for (i = 0; i < mz->mpm->num_buckets; i++) {
ap_mpm_pod_killpg(all_buckets[i].pod, mz->max_daemons_limit);
}
/* Send SIGUSR1 to the active children */
active_children = 0;
for (index = 0; index < ap_num_kids; ++index) {
if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
/* Ask each child to close its listeners. */
ap_mpm_safe_kill(MPM_CHILD_PID(index), AP_SIG_GRACEFUL);
active_children++;
}
}
/* Allow each child which actually finished to exit */
ap_relieve_child_processes(motorz_note_child_killed);
/* cleanup pid file */
ap_remove_pid(pconf, ap_pid_fname);
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(02881)
"caught " AP_SIG_GRACEFUL_STOP_STRING ", shutting down gracefully");
if (ap_graceful_shutdown_timeout) {
cutoff = apr_time_now() +
apr_time_from_sec(ap_graceful_shutdown_timeout);
}
/* Don't really exit until each child has finished */
mz->mpm->shutdown_pending = 0;
do {
/* Pause for a second */
sleep(1);
/* Relieve any children which have now exited */
ap_relieve_child_processes(motorz_note_child_killed);
active_children = 0;
for (index = 0; index < ap_num_kids; ++index) {
if (ap_mpm_safe_kill(MPM_CHILD_PID(index), 0) == APR_SUCCESS) {
active_children = 1;
/* Having just one child is enough to stay around */
break;
}
}
} while (!mz->mpm->shutdown_pending && active_children &&
(!ap_graceful_shutdown_timeout || apr_time_now() < cutoff));
/* We might be here because we received SIGTERM, either
* way, try and make sure that all of our processes are
* really dead.
*/
ap_unixd_killpg(getpgrp(), SIGTERM);
return DONE;
}
/* we've been told to restart */
if (one_process) {
/* not worth thinking about */
return DONE;
}
/* 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.
*/
++mz->mpm->my_generation;
ap_scoreboard_image->global->running_generation = mz->mpm->my_generation;
if (!mz->mpm->is_ungraceful) {
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(02882)
"Graceful restart requested, doing restart");
/* kill off the idle ones */
for (i = 0; i < mz->mpm->num_buckets; i++) {
ap_mpm_pod_killpg(all_buckets[i].pod, mz->max_daemons_limit);
}
/* This is mostly for debugging... so that we know what is still
* gracefully dealing with existing request. This will break
* in a very nasty way if we ever have the scoreboard totally
* file-based (no shared memory)
*/
for (index = 0; index < ap_num_kids; ++index) {
if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
ap_scoreboard_image->servers[index][0].status = SERVER_GRACEFUL;
/* Ask each child to close its listeners.
*
* NOTE: we use the scoreboard, because if we send SIGUSR1
* to every process in the group, this may include CGI's,
* piped loggers, etc. They almost certainly won't handle
* it gracefully.
*/
ap_mpm_safe_kill(ap_scoreboard_image->parent[index].pid, AP_SIG_GRACEFUL);
}
}
}
else {
/* Kill 'em off */
if (ap_unixd_killpg(getpgrp(), SIGHUP) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(02883) "killpg SIGHUP");
}
ap_reclaim_child_processes(0, /* Not when just starting up */
motorz_note_child_killed);
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(02884)
"SIGHUP received. Attempting to restart");
}
return OK;
}
/* This really should be a post_config hook, but the error log is already
* redirected by that point, so we need to do this in the open_logs phase.
*/
static int motorz_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
{
int startup = 0;
int level_flags = 0;
ap_listen_rec **listen_buckets;
apr_status_t rv;
char id[16];
int i;
motorz_core_t *mz = motorz_core_get();
pconf = p;
/* the reverse of pre_config, we want this only the first time around */
if (mz->mpm->module_loads == 1) {
startup = 1;
level_flags |= APLOG_STARTUP;
}
if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
ap_log_error(APLOG_MARK, APLOG_ALERT | level_flags, 0,
(startup ? NULL : s), APLOGNO(03275)
"no listening sockets available, shutting down");
return !OK;
}
if (one_process) {
mz->mpm->num_buckets = 1;
}
else if (!mz->mpm->was_graceful) {
/* Preserve the number of buckets on graceful restarts. */
mz->mpm->num_buckets = 0;
}
if ((rv = ap_duplicate_listeners(pconf, ap_server_conf,
&listen_buckets, &mz->mpm->num_buckets))) {
ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
(startup ? NULL : s), APLOGNO(03276)
"could not duplicate listeners");
return !OK;
}
all_buckets = apr_pcalloc(pconf, mz->mpm->num_buckets *
sizeof(motorz_child_bucket));
for (i = 0; i < mz->mpm->num_buckets; i++) {
if ((rv = ap_mpm_pod_open(pconf, &all_buckets[i].pod))) {
ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
(startup ? NULL : s), APLOGNO(03277)
"could not open pipe-of-death");
return !OK;
}
/* Initialize cross-process accept lock (safe accept needed only) */
if ((rv = SAFE_ACCEPT((apr_snprintf(id, sizeof id, "%i", i),
ap_proc_mutex_create(&all_buckets[i].mutex,
NULL, AP_ACCEPT_MUTEX_TYPE,
id, s, pconf, 0))))) {
ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
(startup ? NULL : s), APLOGNO(03278)
"could not create accept mutex");
return !OK;
}
all_buckets[i].listeners = listen_buckets[i];
}
return OK;
}
static int motorz_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
{
int no_detach, debug, foreground;
apr_status_t rv;
const char *userdata_key = "mpm_motorz_module";
motorz_core_t *mz;
debug = ap_exists_config_define("DEBUG");
if (debug) {
foreground = one_process = 1;
no_detach = 0;
}
else
{
no_detach = ap_exists_config_define("NO_DETACH");
one_process = ap_exists_config_define("ONE_PROCESS");
foreground = ap_exists_config_define("FOREGROUND");
}
ap_mutex_register(p, AP_ACCEPT_MUTEX_TYPE, NULL, APR_LOCK_DEFAULT, 0);
mz = g_motorz_core = ap_retained_data_get(userdata_key);
if (!g_motorz_core) {
mz = g_motorz_core = ap_retained_data_create(userdata_key, sizeof(*g_motorz_core));
mz->mpm = ap_unixd_mpm_get_retained_data();
mz->mpm->baton = mz;
mz->max_daemons_limit = -1;
mz->timeout_ring = motorz_timer_ring;
mz->pollset = motorz_pollset;
}
else if (mz->mpm->baton != mz) {
/* If the MPM changes on restart, be ungraceful */
mz->mpm->baton = mz;
mz->mpm->was_graceful = 0;
}
mz->mpm->mpm_state = AP_MPMQ_STARTING;
++mz->mpm->module_loads;
/* sigh, want this only the second time around */
if (mz->mpm->module_loads == 2) {
if (!one_process && !foreground) {
/* before we detach, setup crash handlers to log to errorlog */
ap_fatal_signal_setup(ap_server_conf, p /* pconf */);
rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
: APR_PROC_DETACH_DAEMONIZE);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(02885)
"apr_proc_detach failed");
return HTTP_INTERNAL_SERVER_ERROR;
}
}
apr_pool_create(&mz->pool, ap_pglobal);
apr_pool_tag(mz->pool, "motorz-mpm-core");
rv = apr_thread_mutex_create(&mz->mtx, 0, mz->pool);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(02966)
"motorz_pre_config: apr_thread_mutex_create failed");
return rv;
}
}
parent_pid = ap_my_pid = getpid();
ap_listen_pre_config();
ap_num_kids = DEFAULT_START_DAEMON;
ap_extended_status = 0;
return OK;
}
static int motorz_check_config(apr_pool_t *p, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s)
{
int startup = 0;
motorz_core_t *mz = motorz_core_get();
/* the reverse of pre_config, we want this only the first time around */
if (mz->mpm->module_loads == 1) {
startup = 1;
}
if (ap_num_kids > DEFAULT_SERVER_LIMIT) {
if (startup) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(02886)
"WARNING: StartServers of %d exceeds compile-time "
"limit of %d servers, decreasing to %d.",
ap_num_kids, DEFAULT_SERVER_LIMIT, DEFAULT_SERVER_LIMIT);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(02887)
"StartServers of %d exceeds compile-time limit "
"of %d, decreasing to match",
ap_num_kids, DEFAULT_SERVER_LIMIT);
}
ap_num_kids = DEFAULT_SERVER_LIMIT;
}
else if (ap_num_kids < 1) {
if (startup) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(02888)
"WARNING: StartServers of %d not allowed, "
"increasing to 1.", ap_num_kids);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(02889)
"StartServers of %d not allowed, increasing to 1",
ap_num_kids);
}
ap_num_kids = 1;
}
if (thread_limit > MAX_THREAD_LIMIT) {
if (startup) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(10015)
"WARNING: ThreadLimit of %d exceeds compile-time "
"limit of %d threads, decreasing to %d.",
thread_limit, MAX_THREAD_LIMIT, MAX_THREAD_LIMIT);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(10016)
"ThreadLimit of %d exceeds compile-time limit "
"of %d, decreasing to match",
thread_limit, MAX_THREAD_LIMIT);
}
thread_limit = MAX_THREAD_LIMIT;
}
else if (thread_limit < 1) {
if (startup) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(10017)
"WARNING: ThreadLimit of %d not allowed, "
"increasing to 1.", thread_limit);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(10018)
"ThreadLimit of %d not allowed, increasing to 1",
thread_limit);
}
thread_limit = 1;
}
if (threads_per_child > thread_limit) {
if (startup) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(03336)
"WARNING: ThreadsPerChild of %d exceeds run-time "
"limit of", threads_per_child);
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(03337)
" %d servers, decreasing to %d.",
thread_limit, thread_limit);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(03338)
"ThreadsPerChild of %d exceeds run-time limit "
"of %d, decreasing to match",
threads_per_child, thread_limit);
}
threads_per_child = thread_limit;
}
else if (threads_per_child < 1) {
if (startup) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(03339)
"WARNING: ThreadsPerChild of %d not allowed, "
"increasing to 1.", threads_per_child);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(03340)
"ThreadsPerChild of %d not allowed, increasing to 1",
threads_per_child);
}
threads_per_child = 1;
}
return OK;
}
static void motorz_hooks(apr_pool_t *p)
{
/* Our open_logs hook function must run before the core's, or stderr
* will be redirected to a file, and the messages won't print to the
* console.
*/
static const char *const aszSucc[] = {"core.c", NULL};
ap_force_set_tz(p);
ap_hook_open_logs(motorz_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
/* we need to set the MPM state before other pre-config hooks use MPM query
* to retrieve it, so register as REALLY_FIRST
*/
ap_hook_pre_config(motorz_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
ap_hook_check_config(motorz_check_config, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_mpm(motorz_run, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_mpm_query(motorz_query, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_mpm_get_name(motorz_get_name, NULL, NULL, APR_HOOK_MIDDLE);
}
static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_num_kids = atoi(arg);
return NULL;
}
static const char *set_threads_per_child(cmd_parms * cmd, void *dummy,
const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
threads_per_child = 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;
}
thread_limit = atoi(arg);
return NULL;
}
static const command_rec motorz_cmds[] = {
LISTEN_COMMANDS,
AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
"Number of child processes launched at server startup"),
AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
"Number of threads each child creates"),
AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF,
"Maximum number of worker threads per child process for this run of Apache - Upper limit for ThreadsPerChild"),
AP_GRACEFUL_SHUTDOWN_TIMEOUT_COMMAND,
{ NULL }
};
AP_DECLARE_MODULE(mpm_motorz) = {
MPM20_MODULE_STUFF,
NULL, /* hook to run before apache parses args */
NULL, /* create per-directory config structure */
NULL, /* merge per-directory config structures */
NULL, /* create per-server config structure */
NULL, /* merge per-server config structures */
motorz_cmds, /* command apr_table_t */
motorz_hooks, /* register hooks */
};