1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/* 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.
*/
/**
* @file scoreboard.h
* @brief Apache scoreboard library
*/
#ifndef APACHE_SCOREBOARD_H
#define APACHE_SCOREBOARD_H
#ifdef __cplusplus
extern "C" {
#endif
#if APR_HAVE_SYS_TIME_H
#include <sys/time.h>
#include <sys/times.h>
#endif
#include "ap_config.h"
#include "http_config.h"
#include "apr_thread_proc.h"
#include "apr_portable.h"
#include "apr_shm.h"
#include "apr_optional.h"
/* Scoreboard file, if there is one */
#ifndef DEFAULT_SCOREBOARD
#define DEFAULT_SCOREBOARD "apache_runtime_status" /* within DEFAULT_REL_RUNTIMEDIR */
#endif
/* Scoreboard info on a process is, for now, kept very brief ---
* just status value and pid (the latter so that the caretaker process
* can properly update the scoreboard when a process dies). We may want
* to eventually add a separate set of long_score structures which would
* give, for each process, the number of requests serviced, and info on
* the current, or most recent, request.
*
* Status values:
*/
#define SERVER_DEAD 0
#define SERVER_STARTING 1 /* Server Starting up */
#define SERVER_READY 2 /* Waiting for connection (or accept() lock) */
#define SERVER_BUSY_READ 3 /* Reading a client request */
#define SERVER_BUSY_WRITE 4 /* Processing a client request */
#define SERVER_BUSY_KEEPALIVE 5 /* Waiting for more requests via keepalive */
#define SERVER_BUSY_LOG 6 /* Logging the request */
#define SERVER_BUSY_DNS 7 /* Looking up a hostname */
#define SERVER_CLOSING 8 /* Closing the connection */
#define SERVER_GRACEFUL 9 /* server is gracefully finishing request */
#define SERVER_IDLE_KILL 10 /* Server is cleaning up idle children. */
#define SERVER_NUM_STATUS 11 /* number of status settings */
/* Type used for generation indicies. Startup and every restart cause a
* new generation of children to be spawned. Children within the same
* generation share the same configuration information -- pointers to stuff
* created at config time in the parent are valid across children. However,
* this can't work effectively with non-forked architectures. So while the
* arrays in the scoreboard never change between the parent and forked
* children, so they do not require shm storage, the contents of the shm
* may contain no pointers.
*/
typedef int ap_generation_t;
/* Is the scoreboard shared between processes or not?
* Set by the MPM when the scoreboard is created.
*/
typedef enum {
SB_NOT_SHARED = 1,
SB_SHARED = 2
} ap_scoreboard_e;
/* stuff which is worker specific */
typedef struct worker_score worker_score;
struct worker_score {
#if APR_HAS_THREADS
apr_os_thread_t tid;
#endif
int thread_num;
/* With some MPMs (e.g., worker), a worker_score can represent
* a thread in a terminating process which is no longer
* represented by the corresponding process_score. These MPMs
* should set pid and generation fields in the worker_score.
*/
pid_t pid;
ap_generation_t generation;
unsigned char status;
unsigned short conn_count;
apr_off_t conn_bytes;
unsigned long access_count;
apr_off_t bytes_served;
unsigned long my_access_count;
apr_off_t my_bytes_served;
apr_time_t start_time;
apr_time_t stop_time;
apr_time_t last_used;
#ifdef HAVE_TIMES
struct tms times;
#endif
char client[40]; /* Keep 'em small... but large enough to hold an IPv6 address */
char request[64]; /* We just want an idea... */
char vhost[32]; /* What virtual host is being accessed? */
char protocol[16]; /* What protocol is used on the connection? */
};
typedef struct {
int server_limit;
int thread_limit;
ap_generation_t running_generation; /* the generation of children which
* should still be serving requests.
*/
apr_time_t restart_time;
} global_score;
/* stuff which the parent generally writes and the children rarely read */
typedef struct process_score process_score;
struct process_score {
pid_t pid;
ap_generation_t generation; /* generation of this child */
char quiescing; /* the process whose pid is stored above is
* going down gracefully
*/
char not_accepting; /* the process is busy and is not accepting more
* connections (for async MPMs)
*/
apr_uint32_t connections; /* total connections (for async MPMs) */
apr_uint32_t write_completion; /* async connections doing write completion */
apr_uint32_t lingering_close; /* async connections in lingering close */
apr_uint32_t keep_alive; /* async connections in keep alive */
apr_uint32_t suspended; /* connections suspended by some module */
int bucket; /* Listener bucket used by this child */
};
/* Scoreboard is now in 'local' memory, since it isn't updated once created,
* even in forked architectures. Child created-processes (non-fork) will
* set up these indicies into the (possibly relocated) shmem records.
*/
typedef struct {
global_score *global;
process_score *parent;
worker_score **servers;
} scoreboard;
typedef struct ap_sb_handle_t ap_sb_handle_t;
/*
* Creation and deletion (internal)
*/
int ap_create_scoreboard(apr_pool_t *p, ap_scoreboard_e t);
apr_status_t ap_cleanup_scoreboard(void *d);
/*
* APIs for MPMs and other modules
*/
AP_DECLARE(int) ap_exists_scoreboard_image(void);
AP_DECLARE(void) ap_increment_counts(ap_sb_handle_t *sbh, request_rec *r);
AP_DECLARE(void) ap_set_conn_count(ap_sb_handle_t *sb, request_rec *r, unsigned short conn_count);
AP_DECLARE(apr_status_t) ap_reopen_scoreboard(apr_pool_t *p, apr_shm_t **shm, int detached);
AP_DECLARE(void) ap_init_scoreboard(void *shared_score);
AP_DECLARE(int) ap_calc_scoreboard_size(void);
AP_DECLARE(void) ap_create_sb_handle(ap_sb_handle_t **new_sbh, apr_pool_t *p,
int child_num, int thread_num);
AP_DECLARE(void) ap_update_sb_handle(ap_sb_handle_t *sbh,
int child_num, int thread_num);
AP_DECLARE(int) ap_find_child_by_pid(apr_proc_t *pid);
AP_DECLARE(int) ap_update_child_status(ap_sb_handle_t *sbh, int status, request_rec *r);
AP_DECLARE(int) ap_update_child_status_from_indexes(int child_num, int thread_num,
int status, request_rec *r);
AP_DECLARE(int) ap_update_child_status_from_conn(ap_sb_handle_t *sbh, int status, conn_rec *c);
AP_DECLARE(int) ap_update_child_status_from_server(ap_sb_handle_t *sbh, int status,
conn_rec *c, server_rec *s);
AP_DECLARE(int) ap_update_child_status_descr(ap_sb_handle_t *sbh, int status, const char *descr);
AP_DECLARE(void) ap_time_process_request(ap_sb_handle_t *sbh, int status);
AP_DECLARE(worker_score *) ap_get_scoreboard_worker(ap_sb_handle_t *sbh);
/** Return a pointer to the worker_score for a given child, thread pair.
* @param child_num The child number.
* @param thread_num The thread number.
* @return A pointer to the worker_score structure.
* @deprecated This function is deprecated, use ap_copy_scoreboard_worker instead. */
AP_DECLARE(worker_score *) ap_get_scoreboard_worker_from_indexes(int child_num,
int thread_num);
/** Copy the contents of a worker scoreboard entry. The contents of
* the worker_score structure are copied verbatim into the dest
* structure.
* @param dest Output parameter.
* @param child_num The child number.
* @param thread_num The thread number.
*/
AP_DECLARE(void) ap_copy_scoreboard_worker(worker_score *dest,
int child_num, int thread_num);
AP_DECLARE(process_score *) ap_get_scoreboard_process(int x);
AP_DECLARE(global_score *) ap_get_scoreboard_global(void);
AP_DECLARE_DATA extern scoreboard *ap_scoreboard_image;
AP_DECLARE_DATA extern const char *ap_scoreboard_fname;
AP_DECLARE_DATA extern int ap_extended_status;
AP_DECLARE_DATA extern int ap_mod_status_reqtail;
/*
* Command handlers [internal]
*/
const char *ap_set_scoreboard(cmd_parms *cmd, void *dummy, const char *arg);
const char *ap_set_extended_status(cmd_parms *cmd, void *dummy, int arg);
const char *ap_set_reqtail(cmd_parms *cmd, void *dummy, int arg);
/* Hooks */
/**
* Hook for post scoreboard creation, pre mpm.
* @param p Apache pool to allocate from.
* @param sb_type
* @ingroup hooks
* @return OK or DECLINE on success; anything else is a error
*/
AP_DECLARE_HOOK(int, pre_mpm, (apr_pool_t *p, ap_scoreboard_e sb_type))
/* for time_process_request() in http_main.c */
#define START_PREQUEST 1
#define STOP_PREQUEST 2
#ifdef __cplusplus
}
#endif
#endif /* !APACHE_SCOREBOARD_H */
|
