httpd/server/scoreboard.c

	scoreboard.c revision 666d616b7986a83bb0eac453694fbf4d6f05b98c
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd/* Copyright 2001-2004 The Apache Software Foundation
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd *
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * Licensed under the Apache License, Version 2.0 (the "License");
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * you may not use this file except in compliance with the License.
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * You may obtain a copy of the License at
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd *
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd *     http://www.apache.org/licenses/LICENSE-2.0
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd *
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * Unless required by applicable law or agreed to in writing, software
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * distributed under the License is distributed on an "AS IS" BASIS,
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen * See the License for the specific language governing permissions and
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen * limitations under the License.
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "apr.h"
d229f940abfb2490dee17979e9a5ff31b7012eb5rbowen#include "apr_strings.h"
3f08db06526d6901aa08c110b5bc7dde6bc39905nd#include "apr_portable.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "apr_lib.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#define APR_WANT_STRFUNC
3f08db06526d6901aa08c110b5bc7dde6bc39905nd#include "apr_want.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
9472e4d3c410be3b3f1addbf3b1db1769f64e765nd#if APR_HAVE_SYS_TYPES_H
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include <sys/types.h>
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#endif
7f5b59ccc63c0c0e3e678a168f09ee6a2f51f9d0nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "ap_config.h"
fac8c35bfb158112226ab43ddf84d59daca5dc30nd#include "httpd.h"
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung#include "http_log.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "http_main.h"
4b575a6b6704b516f22d65a3ad35696d7b9ba372rpluem#include "http_core.h"
4b575a6b6704b516f22d65a3ad35696d7b9ba372rpluem#include "http_config.h"
4b575a6b6704b516f22d65a3ad35696d7b9ba372rpluem#include "ap_mpm.h"
4b575a6b6704b516f22d65a3ad35696d7b9ba372rpluem
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "mpm.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "scoreboard.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndAP_DECLARE_DATA scoreboard *ap_scoreboard_image = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndAP_DECLARE_DATA const char *ap_scoreboard_fname = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndAP_DECLARE_DATA int ap_extended_status = 0;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#if APR_HAS_SHARED_MEMORY
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#include "apr_shm.h"
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#ifndef WIN32
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic /* but must be exported to mpm_winnt */
30471a4650391f57975f60bbb6e4a90be7b284bfhumbedooh#endif
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        apr_shm_t *ap_scoreboard_shm = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#endif
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndAPR_HOOK_STRUCT(
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    APR_HOOK_LINK(pre_mpm)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndAP_IMPLEMENT_HOOK_RUN_ALL(int,pre_mpm,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                          (apr_pool_t *p, ap_scoreboard_e sb_type),
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                          (p, sb_type),OK,DECLINED)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic APR_OPTIONAL_FN_TYPE(ap_proxy_lb_workers)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                                *proxy_lb_workers;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstruct ap_sb_handle_t {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    int child_num;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    int thread_num;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd};
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic int server_limit, thread_limit, lb_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic apr_size_t scoreboard_size;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd/*
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * ToDo:
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * This function should be renamed to cleanup_shared
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * and it should handle cleaning up a scoreboard shared
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * between processes using any form of IPC (file, shared memory
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * segment, etc.). Leave it as is now because it is being used
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * by various MPMs.
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic apr_status_t ap_cleanup_shared_mem(void *d)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#if APR_HAS_SHARED_MEMORY
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    free(ap_scoreboard_image);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    apr_shm_destroy(ap_scoreboard_shm);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#endif
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndAP_DECLARE(apr_size_t) ap_calc_scoreboard_size(void)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_mpm_query(AP_MPMQ_HARD_LIMIT_THREADS, &thread_limit);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_mpm_query(AP_MPMQ_HARD_LIMIT_DAEMONS, &server_limit);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (!proxy_lb_workers)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        proxy_lb_workers = APR_RETRIEVE_OPTIONAL_FN(ap_proxy_lb_workers);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (proxy_lb_workers)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        lb_limit = proxy_lb_workers();
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    else
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        lb_limit = 0;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    scoreboard_size = sizeof(global_score);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    scoreboard_size += sizeof(process_score) * server_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    scoreboard_size += sizeof(worker_score) * server_limit * thread_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (lb_limit)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        scoreboard_size += sizeof(lb_score) * lb_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    return scoreboard_size;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndvoid ap_init_scoreboard(void *shared_score)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    char *more_storage;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    int i;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_calc_scoreboard_size();
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image =
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        calloc(1, sizeof(scoreboard) + server_limit * sizeof(worker_score *) +
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd               server_limit * lb_limit * sizeof(lb_score *));
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    more_storage = shared_score;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image->global = (global_score *)more_storage;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    more_storage += sizeof(global_score);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image->parent = (process_score *)more_storage;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    more_storage += sizeof(process_score) * server_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image->servers =
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        (worker_score **)((char*)ap_scoreboard_image + sizeof(scoreboard));
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    for (i = 0; i < server_limit; i++) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_scoreboard_image->servers[i] = (worker_score *)more_storage;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        more_storage += thread_limit * sizeof(worker_score);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (lb_limit) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_scoreboard_image->balancers = (lb_score *)more_storage;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        more_storage += lb_limit * sizeof(lb_score);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_assert(more_storage == (char*)shared_score + scoreboard_size);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image->global->server_limit = server_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image->global->thread_limit = thread_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    ap_scoreboard_image->global->lb_limit     = lb_limit;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd/**
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * Create a name-based scoreboard in the given pool using the
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * given filename.
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic apr_status_t create_namebased_scoreboard(apr_pool_t *pool,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                                                const char *fname)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#if APR_HAS_SHARED_MEMORY
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    apr_status_t rv;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    /* The shared memory file must not exist before we create the
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd     * segment. */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    apr_shm_remove(fname, pool); /* ignore errors */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    rv = apr_shm_create(&ap_scoreboard_shm, scoreboard_size, fname, pool);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (rv != APR_SUCCESS) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                     "unable to create scoreboard \"%s\" "
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                     "(name-based shared memory failure)", fname);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        return rv;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#endif /* APR_HAS_SHARED_MEMORY */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd/* ToDo: This function should be made to handle setting up
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * a scoreboard shared between processes using any IPC technique,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * not just a shared memory segment
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndstatic apr_status_t open_scoreboard(apr_pool_t *pconf)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#if APR_HAS_SHARED_MEMORY
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    apr_status_t rv;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    char *fname = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    apr_pool_t *global_pool;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    /* We don't want to have to recreate the scoreboard after
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd     * restarts, so we'll create a global pool and never clean it.
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd     */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    rv = apr_pool_create(&global_pool, NULL);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (rv != APR_SUCCESS) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                     "Fatal error: unable to create global pool "
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                     "for use with by the scoreboard");
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        return rv;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    /* The config says to create a name-based shmem */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (ap_scoreboard_fname) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        /* make sure it's an absolute pathname */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        fname = ap_server_root_relative(pconf, ap_scoreboard_fname);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        if (!fname) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            ap_log_error(APLOG_MARK, APLOG_CRIT, APR_EBADPATH, NULL,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                         "Fatal error: Invalid Scoreboard path %s",
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                         ap_scoreboard_fname);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            return APR_EBADPATH;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        return create_namebased_scoreboard(global_pool, fname);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    else { /* config didn't specify, we get to choose shmem type */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        rv = apr_shm_create(&ap_scoreboard_shm, scoreboard_size, NULL,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                            global_pool); /* anonymous shared memory */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        if ((rv != APR_SUCCESS) && (rv != APR_ENOTIMPL)) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                         "Unable to create scoreboard "
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                         "(anonymous shared memory failure)");
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            return rv;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        /* Make up a filename and do name-based shmem */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        else if (rv == APR_ENOTIMPL) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            /* Make sure it's an absolute pathname */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            ap_scoreboard_fname = DEFAULT_SCOREBOARD;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            fname = ap_server_root_relative(pconf, ap_scoreboard_fname);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd            return create_namebased_scoreboard(global_pool, fname);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#endif /* APR_HAS_SHARED_MEMORY */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd/* If detach is non-zero, this is a seperate child process,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd * if zero, it is a forked child.
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndapr_status_t ap_reopen_scoreboard(apr_pool_t *p, apr_shm_t **shm, int detached)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#if APR_HAS_SHARED_MEMORY
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (!detached) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (apr_shm_size_get(ap_scoreboard_shm) < scoreboard_size) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd                     "Fatal error: shared scoreboard too small for child!");
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        apr_shm_detach(ap_scoreboard_shm);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_scoreboard_shm = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        return APR_EINVAL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    /* everything will be cleared shortly */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (*shm) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        *shm = ap_scoreboard_shm;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd#endif
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndapr_status_t ap_cleanup_scoreboard(void *d)
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (ap_scoreboard_image == NULL) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    if (ap_scoreboard_image->global->sb_type == SB_SHARED) {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_cleanup_shared_mem(NULL);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    else {
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        free(ap_scoreboard_image->global);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        free(ap_scoreboard_image);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        ap_scoreboard_image = NULL;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    }
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    return APR_SUCCESS;
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd}
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd/* Create or reinit an existing scoreboard. The MPM can control whether
9472e4d3c410be3b3f1addbf3b1db1769f64e765nd * the scoreboard is shared across multiple processes or not
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd */
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34ndint ap_create_scoreboard(apr_pool_t *p, ap_scoreboard_e sb_type)
7f5b59ccc63c0c0e3e678a168f09ee6a2f51f9d0nd{
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd    int running_gen = 0;
fac8c35bfb158112226ab43ddf84d59daca5dc30nd    int i;
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung#if APR_HAS_SHARED_MEMORY
30471a4650391f57975f60bbb6e4a90be7b284bfhumbedooh    apr_status_t rv;
ba543b319188dc1887607f6d59feddc00e38eee2humbedooh#endif
0d0ba3a410038e179b695446bb149cce6264e0abnd
30471a4650391f57975f60bbb6e4a90be7b284bfhumbedooh    if (ap_scoreboard_image) {
0d0ba3a410038e179b695446bb149cce6264e0abnd        running_gen = ap_scoreboard_image->global->running_generation;
0d0ba3a410038e179b695446bb149cce6264e0abnd        ap_scoreboard_image->global->restart_time = apr_time_now();
0d0ba3a410038e179b695446bb149cce6264e0abnd        memset(ap_scoreboard_image->parent, 0,
0d0ba3a410038e179b695446bb149cce6264e0abnd               sizeof(process_score) * server_limit);
0d0ba3a410038e179b695446bb149cce6264e0abnd        for (i = 0; i < server_limit; i++) {
0d0ba3a410038e179b695446bb149cce6264e0abnd            memset(ap_scoreboard_image->servers[i], 0,
0d0ba3a410038e179b695446bb149cce6264e0abnd                   sizeof(worker_score) * thread_limit);
0d0ba3a410038e179b695446bb149cce6264e0abnd        }
0d0ba3a410038e179b695446bb149cce6264e0abnd        /* Clean up the lb workers data */
0d0ba3a410038e179b695446bb149cce6264e0abnd        if (lb_limit) {
0d0ba3a410038e179b695446bb149cce6264e0abnd            memset(ap_scoreboard_image->balancers, 0,
0d0ba3a410038e179b695446bb149cce6264e0abnd                   sizeof(lb_score) * lb_limit);
0d0ba3a410038e179b695446bb149cce6264e0abnd        }
0d0ba3a410038e179b695446bb149cce6264e0abnd        return OK;
30471a4650391f57975f60bbb6e4a90be7b284bfhumbedooh    }
5effc8b39fae5cd169d17f342bfc265705840014rbowen
d229f940abfb2490dee17979e9a5ff31b7012eb5rbowen    ap_calc_scoreboard_size();
0d0ba3a410038e179b695446bb149cce6264e0abnd#if APR_HAS_SHARED_MEMORY
7fec19672a491661b2fe4b29f685bc7f4efa64d4nd    if (sb_type == SB_SHARED) {
7fec19672a491661b2fe4b29f685bc7f4efa64d4nd        void *sb_shared;
7fec19672a491661b2fe4b29f685bc7f4efa64d4nd        rv = open_scoreboard(p);
97a3ecc40b65d5f8e865bbe0b1c9325d8c016e34nd        if (rv || !(sb_shared = apr_shm_baseaddr_get(ap_scoreboard_shm))) {
            return HTTP_INTERNAL_SERVER_ERROR;
        }
        memset(sb_shared, 0, scoreboard_size);
        ap_init_scoreboard(sb_shared);
    }
    else
#endif
    {
        /* A simple malloc will suffice */
        void *sb_mem = calloc(1, scoreboard_size);
        if (sb_mem == NULL) {
            ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
                         "(%d)%s: cannot allocate scoreboard",
                         errno, strerror(errno));
            return HTTP_INTERNAL_SERVER_ERROR;
        }
        ap_init_scoreboard(sb_mem);
    }

    ap_scoreboard_image->global->sb_type = sb_type;
    ap_scoreboard_image->global->running_generation = running_gen;
    ap_scoreboard_image->global->restart_time = apr_time_now();

    apr_pool_cleanup_register(p, NULL, ap_cleanup_scoreboard, apr_pool_cleanup_null);

    return OK;
}

/* Routines called to deal with the scoreboard image
 * --- note that we do *not* need write locks, since update_child_status
 * only updates a *single* record in place, and only one process writes to
 * a given scoreboard slot at a time (either the child process owning that
 * slot, or the parent, noting that the child has died).
 *
 * As a final note --- setting the score entry to getpid() is always safe,
 * since when the parent is writing an entry, it's only noting SERVER_DEAD
 * anyway.
 */

AP_DECLARE(int) ap_exists_scoreboard_image(void)
{
    return (ap_scoreboard_image ? 1 : 0);
}

AP_DECLARE(void) ap_increment_counts(ap_sb_handle_t *sb, request_rec *r)
{
    worker_score *ws;

    ws = &ap_scoreboard_image->servers[sb->child_num][sb->thread_num];

#ifdef HAVE_TIMES
    times(&ws->times);
#endif
    ws->access_count++;
    ws->my_access_count++;
    ws->conn_count++;
    ws->bytes_served += r->bytes_sent;
    ws->my_bytes_served += r->bytes_sent;
    ws->conn_bytes += r->bytes_sent;
}

AP_DECLARE(int) find_child_by_pid(apr_proc_t *pid)
{
    int i;
    int max_daemons_limit;

    ap_mpm_query(AP_MPMQ_MAX_DAEMONS, &max_daemons_limit);

    for (i = 0; i < max_daemons_limit; ++i) {
        if (ap_scoreboard_image->parent[i].pid == pid->pid) {
            return i;
        }
    }

    return -1;
}

AP_DECLARE(void) ap_create_sb_handle(ap_sb_handle_t **new_sbh, apr_pool_t *p,
                                     int child_num, int thread_num)
{
    *new_sbh = (ap_sb_handle_t *)apr_palloc(p, sizeof(ap_sb_handle_t));
    (*new_sbh)->child_num = child_num;
    (*new_sbh)->thread_num = thread_num;
}

AP_DECLARE(int) ap_update_child_status_from_indexes(int child_num,
                                                    int thread_num,
                                                    int status,
                                                    request_rec *r)
{
    int old_status;
    worker_score *ws;
    process_score *ps;

    if (child_num < 0) {
        return -1;
    }

    ws = &ap_scoreboard_image->servers[child_num][thread_num];
    old_status = ws->status;
    ws->status = status;

    ps = &ap_scoreboard_image->parent[child_num];

    if (status == SERVER_READY
        && old_status == SERVER_STARTING) {
        ws->thread_num = child_num * thread_limit + thread_num;
        ps->generation = ap_my_generation;
    }

    if (ap_extended_status) {
        ws->last_used = apr_time_now();
        if (status == SERVER_READY || status == SERVER_DEAD) {
            /*
             * Reset individual counters
             */
            if (status == SERVER_DEAD) {
                ws->my_access_count = 0L;
                ws->my_bytes_served = 0L;
            }
            ws->conn_count = 0;
            ws->conn_bytes = 0;
        }
        if (r) {
            conn_rec *c = r->connection;
            apr_cpystrn(ws->client, ap_get_remote_host(c, r->per_dir_config,
                        REMOTE_NOLOOKUP, NULL), sizeof(ws->client));
            if (r->the_request == NULL) {
                apr_cpystrn(ws->request, "NULL", sizeof(ws->request));
            } else if (r->parsed_uri.password == NULL) {
                apr_cpystrn(ws->request, r->the_request, sizeof(ws->request));
            } else {
                /* Don't reveal the password in the server-status view */
                apr_cpystrn(ws->request, apr_pstrcat(r->pool, r->method, " ",
                            apr_uri_unparse(r->pool, &r->parsed_uri,
                            APR_URI_UNP_OMITPASSWORD),
                            r->assbackwards ? NULL : " ", r->protocol, NULL),
                            sizeof(ws->request));
            }
            apr_cpystrn(ws->vhost, r->server->server_hostname,
                        sizeof(ws->vhost));
        }
    }

    return old_status;
}

AP_DECLARE(int) ap_update_child_status(ap_sb_handle_t *sbh, int status,
                                      request_rec *r)
{
    return ap_update_child_status_from_indexes(sbh->child_num, sbh->thread_num,
                                               status, r);
}

void ap_time_process_request(int child_num, int thread_num, int status)
{
    worker_score *ws;

    if (child_num < 0) {
        return;
    }

    ws = &ap_scoreboard_image->servers[child_num][thread_num];

    if (status == START_PREQUEST) {
        ws->start_time = apr_time_now();
    }
    else if (status == STOP_PREQUEST) {
        ws->stop_time = apr_time_now();
    }
}

AP_DECLARE(worker_score *) ap_get_scoreboard_worker(int x, int y)
{
    if (((x < 0) || (server_limit < x)) ||
        ((y < 0) || (thread_limit < y))) {
        return(NULL); /* Out of range */
    }
    return &ap_scoreboard_image->servers[x][y];
}

AP_DECLARE(process_score *) ap_get_scoreboard_process(int x)
{
    if ((x < 0) || (server_limit < x)) {
        return(NULL); /* Out of range */
    }
    return &ap_scoreboard_image->parent[x];
}

AP_DECLARE(global_score *) ap_get_scoreboard_global()
{
    return ap_scoreboard_image->global;
}

AP_DECLARE(lb_score *) ap_get_scoreboard_lb(int lb_num)
{
    if (((lb_num < 0) || (lb_limit < lb_num))) {
        return(NULL); /* Out of range */
    }
    return &ap_scoreboard_image->balancers[lb_num];
}