motorz.h revision ccb1d3d23d96790217807954139c625ec9763350
/* 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 "apr.h"
#include "apr_portable.h"
#include "apr_strings.h"
#include "apr_thread_proc.h"
#include "apr_signal.h"
#define APR_WANT_STDIO
#define APR_WANT_STRFUNC
#include "apr_want.h"
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include "ap_config.h"
#include "httpd.h"
#include "mpm_default.h"
#include "http_main.h"
#include "http_log.h"
#include "http_config.h"
#include "http_core.h" /* for get_remote_host */
#include "http_connection.h"
#include "scoreboard.h"
#include "ap_mpm.h"
#include "util_mutex.h"
#include "unixd.h"
#include "http_vhost.h"
#include "mpm_common.h"
#include "ap_listen.h"
#include "ap_mmn.h"
#include "apr_poll.h"
#include "apr_skiplist.h"
#include "apr_thread_pool.h"
#include "util_time.h"
#include <stdlib.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SYS_PROCESSOR_H
#include <sys/processor.h> /* for bindprocessor() */
#endif
#include <signal.h>
#include <sys/times.h>
/* Limit on the total --- clients will be locked out if more servers than
* this are needed. It is intended solely to keep the server from crashing
* when things get out of hand.
*
* We keep a hard maximum number of servers, for two reasons --- first off,
* in case something goes seriously wrong, we want to stop the fork bomb
* short of actually crashing the machine we're running on by filling some
* kernel table. Secondly, it keeps the size of the scoreboard file small
* enough that we can read the whole thing without worrying too much about
* the overhead.
*/
#ifndef DEFAULT_SERVER_LIMIT
#define DEFAULT_SERVER_LIMIT 256
#endif
/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want
* some sort of compile-time limit to help catch typos.
*/
#ifndef MAX_SERVER_LIMIT
#define MAX_SERVER_LIMIT 200000
#endif
/* Limit on the threads per process. Clients will be locked out if more than
* this are needed.
*
* We keep this for one reason it keeps the size of the scoreboard file small
* enough that we can read the whole thing without worrying too much about
* the overhead.
*/
#ifndef DEFAULT_THREAD_LIMIT
#define DEFAULT_THREAD_LIMIT 64
#endif
/* Admin can't tune ThreadLimit beyond MAX_THREAD_LIMIT. We want
* some sort of compile-time limit to help catch typos.
*/
#ifndef MAX_THREAD_LIMIT
#define MAX_THREAD_LIMIT 100000
#endif
#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
/**
* typedefs
*/
/* data retained by prefork across load/unload of the module
* allocated on first call to pre-config hook; located on
* subsequent calls to pre-config hook
*/
typedef struct motorz_core_t motorz_core_t;
struct motorz_core_t {
int first_server_limit;
int module_loads;
ap_generation_t my_generation;
int volatile is_graceful; /* set from signal handler */
int maxclients_reported;
/*
* The max child slot ever assigned, preserved across restarts. Necessary
* to deal with MaxRequestWorkers changes across AP_SIG_GRACEFUL restarts. We
* use this value to optimize routines that have to scan the entire scoreboard.
*/
int max_daemons_limit;
apr_pool_t *pool;
apr_thread_mutex_t *mtx;
apr_pollset_t *pollset;
apr_skiplist *timer_ring;
apr_thread_pool_t *workers;
};
typedef struct motorz_child_bucket motorz_child_bucket;
struct motorz_child_bucket {
ap_pod_t *pod;
ap_listen_rec *listeners;
apr_proc_mutex_t *mutex;
};
typedef enum
{
PT_CSD,
PT_ACCEPT,
PT_USER
} motorz_poll_type_e;
typedef struct motorz_sb_t motorz_sb_t;
struct motorz_sb_t
{
motorz_poll_type_e type;
void *baton;
};
typedef void (*motorz_timer_cb) (motorz_core_t *mz, void *baton);
typedef void (*motorz_io_sock_cb) (motorz_core_t *mz, apr_socket_t *sock,
int flags, void *baton);
typedef void (*motorz_io_file_cb) (motorz_core_t *mz, apr_socket_t *sock,
int flags, void *baton);
typedef struct motorz_timer_t motorz_timer_t;
struct motorz_timer_t
{
apr_time_t expires;
motorz_timer_cb cb;
void *baton;
apr_pool_t *pool;
motorz_core_t *mz;
};
typedef struct motorz_conn_t motorz_conn_t;
struct motorz_conn_t
{
apr_pool_t *pool;
motorz_core_t *mz;
apr_socket_t *sock;
apr_bucket_alloc_t *ba;
ap_sb_handle_t *sbh;
/** connection record this struct refers to */
conn_rec *c;
/** request record (if any) this struct refers to */
request_rec *r;
/** is the current conn_rec suspended? */
int suspended;
/** poll file descriptor information */
apr_pollfd_t pfd;
/** public parts of the connection state */
conn_state_t cs;
};