| /* Copyright 2001-2005 The Apache Software Foundation or its licensors, as |
| * applicable. |
| * |
| * Licensed 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. |
| */ |
| |
| #ifndef APACHE_SCOREBOARD_H |
| #define APACHE_SCOREBOARD_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifdef HAVE_SYS_TIMES_H |
| #include <sys/time.h> |
| #include <sys/times.h> |
| #elif defined(TPF) |
| #include <time.h> |
| #endif |
| |
| #include "ap_config.h" |
| #include "apr_hooks.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 "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 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; |
| |
| #define SB_WORKING 0 /* The server is busy and the child is useful. */ |
| #define SB_IDLE_DIE 1 /* The server is idle and the child is superfluous. */ |
| /* The child should check for this and exit gracefully. */ |
| |
| /* stuff which is worker specific */ |
| /***********************WARNING***************************************/ |
| /* These are things that are used by mod_status. Do not put anything */ |
| /* in here that you cannot live without. This structure will not */ |
| /* be available if mod_status is not loaded. */ |
| /*********************************************************************/ |
| typedef struct worker_score worker_score; |
| |
| struct worker_score { |
| int thread_num; |
| #if APR_HAS_THREADS |
| apr_os_thread_t tid; |
| #endif |
| /* 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 long access_count; |
| apr_off_t bytes_served; |
| unsigned long my_access_count; |
| apr_off_t my_bytes_served; |
| apr_off_t conn_bytes; |
| unsigned short conn_count; |
| apr_time_t start_time; |
| apr_time_t stop_time; |
| #ifdef HAVE_TIMES |
| struct tms times; |
| #endif |
| apr_time_t last_used; |
| char client[32]; /* Keep 'em small... */ |
| char request[64]; /* We just want an idea... */ |
| char vhost[32]; /* What virtual host is being accessed? */ |
| }; |
| |
| typedef struct { |
| int server_limit; |
| int thread_limit; |
| ap_scoreboard_e sb_type; |
| ap_generation_t running_generation; /* the generation of children which |
| * should still be serving requests. |
| */ |
| apr_time_t restart_time; |
| int lb_limit; |
| } 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 */ |
| ap_scoreboard_e sb_type; |
| int quiescing; /* the process whose pid is stored above is |
| * going down gracefully |
| */ |
| }; |
| |
| /* stuff which is lb specific */ |
| typedef struct lb_score lb_score; |
| struct lb_score{ |
| /* TODO: make a real stuct from this */ |
| unsigned char data[1024]; |
| }; |
| |
| /* 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; |
| lb_score *balancers; |
| } scoreboard; |
| |
| typedef struct ap_sb_handle_t ap_sb_handle_t; |
| |
| AP_DECLARE(int) ap_exists_scoreboard_image(void); |
| AP_DECLARE(void) ap_increment_counts(ap_sb_handle_t *sbh, request_rec *r); |
| |
| int ap_create_scoreboard(apr_pool_t *p, ap_scoreboard_e t); |
| apr_status_t ap_reopen_scoreboard(apr_pool_t *p, apr_shm_t **shm, int detached); |
| void ap_init_scoreboard(void *shared_score); |
| AP_DECLARE(int) ap_calc_scoreboard_size(void); |
| apr_status_t ap_cleanup_scoreboard(void *d); |
| |
| AP_DECLARE(void) ap_create_sb_handle(ap_sb_handle_t **new_sbh, apr_pool_t *p, |
| int child_num, int thread_num); |
| |
| int 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); |
| void ap_time_process_request(ap_sb_handle_t *sbh, int status); |
| |
| AP_DECLARE(worker_score *) ap_get_scoreboard_worker(int x, int y); |
| AP_DECLARE(process_score *) ap_get_scoreboard_process(int x); |
| AP_DECLARE(global_score *) ap_get_scoreboard_global(void); |
| AP_DECLARE(lb_score *) ap_get_scoreboard_lb(int lb_num); |
| |
| 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 ap_generation_t volatile ap_my_generation; |
| |
| /* 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)) |
| |
| /** |
| * proxy load balancer |
| * @return the number of load balancer workers. |
| */ |
| APR_DECLARE_OPTIONAL_FN(int, ap_proxy_lb_workers, |
| (void)); |
| |
| /* for time_process_request() in http_main.c */ |
| #define START_PREQUEST 1 |
| #define STOP_PREQUEST 2 |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* !APACHE_SCOREBOARD_H */ |