1 /* ====================================================================
2 * The Apache Software License, Version 1.1
4 * Copyright (c) 2000-2003 The Apache Software Foundation. All rights
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * ====================================================================
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>.
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
59 #ifndef APACHE_SCOREBOARD_H
60 #define APACHE_SCOREBOARD_H
66 #ifdef HAVE_SYS_TIMES_H
68 #include <sys/times.h>
73 #include "ap_config.h"
74 #include "apr_hooks.h"
75 #include "apr_thread_proc.h"
76 #include "apr_portable.h"
79 /* Scoreboard file, if there is one */
80 #ifndef DEFAULT_SCOREBOARD
81 #define DEFAULT_SCOREBOARD "logs/apache_runtime_status"
84 /* Scoreboard info on a process is, for now, kept very brief ---
85 * just status value and pid (the latter so that the caretaker process
86 * can properly update the scoreboard when a process dies). We may want
87 * to eventually add a separate set of long_score structures which would
88 * give, for each process, the number of requests serviced, and info on
89 * the current, or most recent, request.
95 #define SERVER_STARTING 1 /* Server Starting up */
96 #define SERVER_READY 2 /* Waiting for connection (or accept() lock) */
97 #define SERVER_BUSY_READ 3 /* Reading a client request */
98 #define SERVER_BUSY_WRITE 4 /* Processing a client request */
99 #define SERVER_BUSY_KEEPALIVE 5 /* Waiting for more requests via keepalive */
100 #define SERVER_BUSY_LOG 6 /* Logging the request */
101 #define SERVER_BUSY_DNS 7 /* Looking up a hostname */
102 #define SERVER_CLOSING 8 /* Closing the connection */
103 #define SERVER_GRACEFUL 9 /* server is gracefully finishing request */
104 #define SERVER_IDLE_KILL 10 /* Server is cleaning up idle children. */
105 #define SERVER_NUM_STATUS 11 /* number of status settings */
107 /* Type used for generation indicies. Startup and every restart cause a
108 * new generation of children to be spawned. Children within the same
109 * generation share the same configuration information -- pointers to stuff
110 * created at config time in the parent are valid across children. However,
111 * this can't work effectively with non-forked architectures. So while the
112 * arrays in the scoreboard never change between the parent and forked
113 * children, so they do not require shm storage, the contents of the shm
114 * may contain no pointers.
116 typedef int ap_generation_t;
118 /* Is the scoreboard shared between processes or not?
119 * Set by the MPM when the scoreboard is created.
126 #define SB_WORKING 0 /* The server is busy and the child is useful. */
127 #define SB_IDLE_DIE 1 /* The server is idle and the child is superfluous. */
128 /* The child should check for this and exit gracefully. */
130 /* stuff which is worker specific */
131 /***********************WARNING***************************************/
132 /* These are things that are used by mod_status. Do not put anything */
133 /* in here that you cannot live without. This structure will not */
134 /* be available if mod_status is not loaded. */
135 /*********************************************************************/
136 typedef struct worker_score worker_score;
138 struct worker_score {
143 unsigned char status;
144 unsigned long access_count;
145 apr_off_t bytes_served;
146 unsigned long my_access_count;
147 apr_off_t my_bytes_served;
148 apr_off_t conn_bytes;
149 unsigned short conn_count;
150 apr_time_t start_time;
151 apr_time_t stop_time;
155 apr_time_t last_used;
156 char client[32]; /* Keep 'em small... */
157 char request[64]; /* We just want an idea... */
158 char vhost[32]; /* What virtual host is being accessed? */
164 ap_scoreboard_e sb_type;
165 ap_generation_t running_generation; /* the generation of children which
166 * should still be serving requests. */
167 apr_time_t restart_time;
170 /* stuff which the parent generally writes and the children rarely read */
171 typedef struct process_score process_score;
172 struct process_score{
174 ap_generation_t generation; /* generation of this child */
175 ap_scoreboard_e sb_type;
176 int quiescing; /* the process whose pid is stored above is
177 * going down gracefully
181 /* Scoreboard is now in 'local' memory, since it isn't updated once created,
182 * even in forked architectures. Child created-processes (non-fork) will
183 * set up these indicies into the (possibly relocated) shmem records.
186 global_score *global;
187 process_score *parent;
188 worker_score **servers;
191 typedef struct ap_sb_handle_t ap_sb_handle_t;
193 AP_DECLARE(int) ap_exists_scoreboard_image(void);
194 AP_DECLARE(void) ap_increment_counts(ap_sb_handle_t *sbh, request_rec *r);
196 int ap_create_scoreboard(apr_pool_t *p, ap_scoreboard_e t);
197 apr_status_t ap_reopen_scoreboard(apr_pool_t *p, apr_shm_t **shm, int detached);
198 void ap_init_scoreboard(void *shared_score);
199 AP_DECLARE(int) ap_calc_scoreboard_size(void);
200 apr_status_t ap_cleanup_scoreboard(void *d);
202 AP_DECLARE(void) ap_create_sb_handle(ap_sb_handle_t **new_sbh, apr_pool_t *p,
203 int child_num, int thread_num);
205 AP_DECLARE(int) find_child_by_pid(apr_proc_t *pid);
206 AP_DECLARE(int) ap_update_child_status(ap_sb_handle_t *sbh, int status, request_rec *r);
207 AP_DECLARE(int) ap_update_child_status_from_indexes(int child_num, int thread_num,
208 int status, request_rec *r);
209 void ap_time_process_request(int child_num, int thread_num, int status);
211 AP_DECLARE(worker_score *) ap_get_scoreboard_worker(int x, int y);
212 AP_DECLARE(process_score *) ap_get_scoreboard_process(int x);
213 AP_DECLARE(global_score *) ap_get_scoreboard_global(void);
215 AP_DECLARE_DATA extern scoreboard *ap_scoreboard_image;
216 AP_DECLARE_DATA extern const char *ap_scoreboard_fname;
217 AP_DECLARE_DATA extern int ap_extended_status;
219 AP_DECLARE_DATA extern ap_generation_t volatile ap_my_generation;
223 * Hook for post scoreboard creation, pre mpm.
224 * @param p Apache pool to allocate from.
227 * @return OK or DECLINE on success; anything else is a error
229 AP_DECLARE_HOOK(int, pre_mpm, (apr_pool_t *p, ap_scoreboard_e sb_type))
231 /* for time_process_request() in http_main.c */
232 #define START_PREQUEST 1
233 #define STOP_PREQUEST 2
239 #endif /* !APACHE_SCOREBOARD_H */