/* 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.
*/
/* Scoreboard file, if there is one */ #ifndef DEFAULT_SCOREBOARD #define DEFAULT_SCOREBOARD "logs/apache_runtime_status" #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 indices. 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.
*/ typedefint ap_generation_t;
/* Is the scoreboard shared between processes or not? * Set by the MPM when the scoreboard is created.
*/ typedefenum {
SB_NOT_SHARED = 1,
SB_SHARED = 2
} ap_scoreboard_e;
/* stuff which is worker specific */ typedefstruct 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; unsignedchar status; unsignedshort conn_count;
apr_off_t conn_bytes; unsignedlong access_count;
apr_off_t bytes_served; unsignedlong 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[32]; /* DEPRECATED: Keep 'em small... */ 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? */
apr_time_t duration; char client64[64];
};
typedefstruct { 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; #ifdef HAVE_TIMES struct tms times; #endif
} global_score;
/* stuff which the parent generally writes and the children rarely read */ typedefstruct 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 in 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; this field is DEPRECATED * and no longer updated by the MPMs (i.e. always zero).
*/
apr_uint32_t wait_io; /* async connections waiting an IO in the MPM */
};
/* 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 indices into the (possibly relocated) shmem records.
*/ typedefstruct {
global_score *global;
process_score *parent;
worker_score **servers;
} scoreboard;
typedefstruct 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, unsignedshort conn_count);
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, constchar *descr);
/** 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);
/* 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 */
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