| /* 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 "ap_mpm.h" |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "mpm_common.h" |
| #include "http_log.h" |
| #include "scoreboard.h" |
| #include "ap_listen.h" |
| #include "simple_types.h" |
| #include "simple_run.h" |
| #include "http_core.h" |
| |
| /* This file contains the absolute minimal MPM API, to interface with httpd. */ |
| |
| static int simple_run(apr_pool_t * pconf, apr_pool_t * plog, server_rec * s) |
| { |
| simple_core_t *sc = simple_core_get(); |
| |
| sc->mpm_state = AP_MPMQ_RUNNING; |
| |
| if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) { |
| sc->mpm_state = AP_MPMQ_STOPPING; |
| return !OK; |
| } |
| |
| return simple_main_loop(sc); |
| } |
| |
| static int simple_query(int query_code, int *result, apr_status_t *rv) |
| { |
| simple_core_t *sc = simple_core_get(); |
| |
| *rv = APR_SUCCESS; |
| switch (query_code) { |
| case AP_MPMQ_IS_THREADED: |
| *result = AP_MPMQ_STATIC; |
| break; |
| case AP_MPMQ_IS_FORKED: |
| *result = AP_MPMQ_DYNAMIC; |
| break; |
| case AP_MPMQ_IS_ASYNC: |
| *result = 1; |
| break; |
| case AP_MPMQ_MAX_DAEMON_USED: |
| *result = sc->procmgr.proc_count; |
| break; |
| case AP_MPMQ_HARD_LIMIT_DAEMONS: |
| *result = sc->procmgr.proc_count; |
| break; |
| case AP_MPMQ_HARD_LIMIT_THREADS: |
| *result = sc->procmgr.thread_count; |
| break; |
| case AP_MPMQ_MAX_THREADS: |
| *result = sc->procmgr.thread_count; |
| break; |
| case AP_MPMQ_MAX_SPARE_DAEMONS: |
| *result = sc->procmgr.proc_count; |
| break; |
| case AP_MPMQ_MIN_SPARE_DAEMONS: |
| *result = sc->procmgr.proc_count; |
| break; |
| case AP_MPMQ_MIN_SPARE_THREADS: |
| case AP_MPMQ_MAX_SPARE_THREADS: |
| *result = sc->procmgr.thread_count; |
| break; |
| case AP_MPMQ_MAX_REQUESTS_DAEMON: |
| *result = sc->procmgr.max_requests_per_child; |
| break; |
| case AP_MPMQ_MAX_DAEMONS: |
| *result = sc->procmgr.proc_count; |
| break; |
| case AP_MPMQ_MPM_STATE: |
| *result = sc->mpm_state; |
| break; |
| case AP_MPMQ_GENERATION: |
| *result = 0; |
| break; |
| default: |
| *rv = APR_ENOTIMPL; |
| break; |
| } |
| return OK; |
| } |
| |
| static const char * |
| simple_get_name(void) |
| { |
| return "simple"; |
| } |
| |
| static int |
| simple_open_logs(apr_pool_t * p, |
| apr_pool_t * plog, apr_pool_t * ptemp, server_rec * s) |
| { |
| int nsock; |
| |
| nsock = ap_setup_listeners(s); |
| |
| if (nsock < 1) { |
| ap_log_error(APLOG_MARK, APLOG_ALERT, 0, |
| s, APLOGNO(00256) |
| "simple_open_logs: no listening sockets available, shutting down"); |
| return !OK; |
| } |
| |
| return OK; |
| } |
| |
| static int |
| simple_pre_config(apr_pool_t * pconf, apr_pool_t * plog, apr_pool_t * ptemp) |
| { |
| int run_debug; |
| apr_status_t rv; |
| simple_core_t *sc; |
| |
| /* this is our first 'real' entry point, so setup everything here. */ |
| rv = simple_core_init_once(); |
| |
| if (rv) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00257) |
| "simple_core_init_once: Fatal Error Encountered"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| sc = simple_core_get(); |
| |
| sc->restart_num++; |
| |
| run_debug = ap_exists_config_define("DEBUG"); |
| |
| if (run_debug) { |
| sc->run_foreground = 1; |
| sc->run_single_process = 1; |
| } |
| else { |
| sc->run_foreground = ap_exists_config_define("FOREGROUND"); |
| } |
| |
| if (sc->restart_num == 2) { |
| |
| if (sc->run_foreground) { |
| rv = apr_proc_detach(APR_PROC_DETACH_FOREGROUND); |
| } |
| else { |
| rv = apr_proc_detach(APR_PROC_DETACH_DAEMONIZE); |
| } |
| |
| if (rv) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00258) |
| "simple_pre_config: apr_proc_detach(%s) failed", |
| sc->run_foreground ? "FOREGROUND" : "DAEMONIZE"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| |
| return OK; |
| } |
| |
| static int |
| simple_check_config(apr_pool_t * p, apr_pool_t * plog, |
| apr_pool_t * ptemp, server_rec * s) |
| { |
| simple_core_t *sc = simple_core_get(); |
| |
| if (sc->procmgr.proc_count > SIMPLE_MAX_PROC) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00259) |
| "simple_check_config: SimpleProcCount must be at most %d", |
| SIMPLE_MAX_PROC); |
| return !OK; |
| } |
| |
| if (sc->procmgr.proc_count < SIMPLE_MIN_PROC) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00260) |
| "simple_check_config: SimpleProcCount must be at least %d", |
| SIMPLE_MIN_PROC); |
| return !OK; |
| } |
| |
| if (sc->procmgr.thread_count > SIMPLE_MAX_THREADS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00261) |
| "simple_check_config: SimpleThreadCount must be at most %d", |
| SIMPLE_MAX_THREADS); |
| return !OK; |
| } |
| |
| if (sc->procmgr.thread_count < SIMPLE_MIN_THREADS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00262) |
| "simple_check_config: SimpleThreadCount must be at least %d", |
| SIMPLE_MIN_THREADS); |
| return !OK; |
| } |
| |
| return OK; |
| } |
| |
| static void simple_hooks(apr_pool_t * p) |
| { |
| static const char *const aszSucc[] = { "core.c", NULL }; |
| |
| ap_hook_open_logs(simple_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST); |
| |
| ap_hook_pre_config(simple_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST); |
| |
| ap_hook_check_config(simple_check_config, NULL, NULL, APR_HOOK_MIDDLE); |
| |
| ap_hook_mpm(simple_run, NULL, NULL, APR_HOOK_MIDDLE); |
| |
| ap_hook_mpm_query(simple_query, NULL, NULL, APR_HOOK_MIDDLE); |
| |
| ap_hook_mpm_get_name(simple_get_name, NULL, NULL, APR_HOOK_MIDDLE); |
| } |
| |
| static const char *set_proccount(cmd_parms * cmd, void *baton, |
| const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| simple_core_get()->procmgr.proc_count = atoi(arg); |
| return NULL; |
| } |
| |
| |
| static const char *set_threadcount(cmd_parms * cmd, void *baton, |
| const char *arg) |
| { |
| simple_core_t *sc = simple_core_get(); |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| |
| if (err != NULL) { |
| return err; |
| } |
| |
| sc->procmgr.thread_count = atoi(arg); |
| |
| return NULL; |
| } |
| |
| static const command_rec simple_cmds[] = { |
| AP_INIT_TAKE1("SimpleProcCount", set_proccount, NULL, RSRC_CONF, |
| "Number of child processes launched at server startup"), |
| AP_INIT_TAKE1("SimpleThreadCount", set_threadcount, NULL, RSRC_CONF, |
| "Set the number of Worker Threads Per-Process"), |
| /* pqXXXXXXXXX: These do NOT belong in the MPM configuration commands. */ |
| LISTEN_COMMANDS, |
| {NULL} |
| }; |
| |
| |
| |
| AP_DECLARE_MODULE(mpm_simple) = { |
| 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 */ |
| simple_cmds, /* command apr_table_t */ |
| simple_hooks /* register_hooks */ |
| }; |
