/* 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_PROCESS; 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_PROCESS"); scon->cs.state = CONN_STATE_PROCESS; } read_request: if (scon->cs.state == CONN_STATE_PROCESS) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(03328) "motorz_io_process(): CONN_STATE_PROCESS"); 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_PROCESS; 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 */ };