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/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* The purpose of this file is to store the code that MOST mpm's will need
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* this does not mean a function only goes into this file if every MPM needs
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* it. It means that if a function is needed by more than one MPM, and
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* future maintenance would be served by making the code common, then the
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* function belongs here.
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*
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* This is going in src/main because it is not platform specific, it is
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* specific to multi-process servers, but NOT to Unix. Which is why it
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* does not belong in src/os/unix
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*/
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#include "apr.h"
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#include "apr_thread_proc.h"
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#include "apr_signal.h"
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#include "apr_strings.h"
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#define APR_WANT_STRFUNC
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#include "apr_want.h"
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#include "apr_getopt.h"
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#include "apr_optional.h"
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#include "apr_allocator.h"
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#include "httpd.h"
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#include "http_config.h"
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#include "http_core.h"
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#include "http_log.h"
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#include "http_main.h"
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#include "mpm_common.h"
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#include "mod_core.h"
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#include "ap_mpm.h"
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#include "ap_listen.h"
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#include "util_mutex.h"
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#include "scoreboard.h"
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#ifdef HAVE_GRP_H
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#include <grp.h>
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#endif
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#if APR_HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* we know core's module_index is 0 */
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#undef APLOG_MODULE_INDEX
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#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
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#define DEFAULT_HOOK_LINKS \
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APR_HOOK_LINK(monitor) \
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APR_HOOK_LINK(drop_privileges) \
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APR_HOOK_LINK(mpm) \
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APR_HOOK_LINK(mpm_query) \
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APR_HOOK_LINK(mpm_register_timed_callback) \
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APR_HOOK_LINK(mpm_get_name) \
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APR_HOOK_LINK(end_generation) \
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APR_HOOK_LINK(child_status) \
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APR_HOOK_LINK(suspend_connection) \
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APR_HOOK_LINK(resume_connection)
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#if AP_ENABLE_EXCEPTION_HOOK
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APR_HOOK_STRUCT(
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APR_HOOK_LINK(fatal_exception)
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DEFAULT_HOOK_LINKS
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)
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AP_IMPLEMENT_HOOK_RUN_ALL(int, fatal_exception,
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(ap_exception_info_t *ei), (ei), OK, DECLINED)
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#else
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APR_HOOK_STRUCT(
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DEFAULT_HOOK_LINKS
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)
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#endif
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AP_IMPLEMENT_HOOK_RUN_ALL(int, monitor,
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(apr_pool_t *p, server_rec *s), (p, s), OK, DECLINED)
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AP_IMPLEMENT_HOOK_RUN_ALL(int, drop_privileges,
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(apr_pool_t * pchild, server_rec * s),
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(pchild, s), OK, DECLINED)
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AP_IMPLEMENT_HOOK_RUN_FIRST(int, mpm,
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(apr_pool_t *pconf, apr_pool_t *plog, server_rec *s),
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(pconf, plog, s), DECLINED)
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AP_IMPLEMENT_HOOK_RUN_FIRST(int, mpm_query,
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(int query_code, int *result, apr_status_t *_rv),
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(query_code, result, _rv), DECLINED)
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AP_IMPLEMENT_HOOK_RUN_FIRST(apr_status_t, mpm_register_timed_callback,
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(apr_time_t t, ap_mpm_callback_fn_t *cbfn, void *baton),
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(t, cbfn, baton), APR_ENOTIMPL)
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AP_IMPLEMENT_HOOK_VOID(end_generation,
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(server_rec *s, ap_generation_t gen),
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(s, gen))
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AP_IMPLEMENT_HOOK_VOID(child_status,
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(server_rec *s, pid_t pid, ap_generation_t gen, int slot, mpm_child_status status),
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(s,pid,gen,slot,status))
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AP_IMPLEMENT_HOOK_VOID(suspend_connection,
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(conn_rec *c, request_rec *r),
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(c, r))
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AP_IMPLEMENT_HOOK_VOID(resume_connection,
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(conn_rec *c, request_rec *r),
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(c, r))
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/* hooks with no args are implemented last, after disabling APR hook probes */
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#if defined(APR_HOOK_PROBES_ENABLED)
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#undef APR_HOOK_PROBES_ENABLED
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#undef APR_HOOK_PROBE_ENTRY
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#define APR_HOOK_PROBE_ENTRY(ud,ns,name,args)
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#undef APR_HOOK_PROBE_RETURN
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#define APR_HOOK_PROBE_RETURN(ud,ns,name,rv,args)
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#undef APR_HOOK_PROBE_INVOKE
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#define APR_HOOK_PROBE_INVOKE(ud,ns,name,src,args)
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#undef APR_HOOK_PROBE_COMPLETE
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#define APR_HOOK_PROBE_COMPLETE(ud,ns,name,src,rv,args)
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#undef APR_HOOK_INT_DCL_UD
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#define APR_HOOK_INT_DCL_UD
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#endif
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AP_IMPLEMENT_HOOK_RUN_FIRST(const char *, mpm_get_name,
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(void),
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(), NULL)
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typedef struct mpm_gen_info_t {
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APR_RING_ENTRY(mpm_gen_info_t) link;
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int gen; /* which gen? */
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int active; /* number of active processes */
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int done; /* gen finished? (whether or not active processes) */
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} mpm_gen_info_t;
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APR_RING_HEAD(mpm_gen_info_head_t, mpm_gen_info_t);
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static struct mpm_gen_info_head_t *geninfo, *unused_geninfo;
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static int gen_head_init; /* yuck */
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/* variables representing config directives implemented here */
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AP_DECLARE_DATA const char *ap_pid_fname;
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AP_DECLARE_DATA int ap_max_requests_per_child;
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AP_DECLARE_DATA char ap_coredump_dir[MAX_STRING_LEN];
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AP_DECLARE_DATA int ap_coredumpdir_configured;
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AP_DECLARE_DATA int ap_graceful_shutdown_timeout;
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AP_DECLARE_DATA apr_uint32_t ap_max_mem_free;
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AP_DECLARE_DATA apr_size_t ap_thread_stacksize;
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#define ALLOCATOR_MAX_FREE_DEFAULT (2048*1024)
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/* Set defaults for config directives implemented here. This is
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* called from core's pre-config hook, so MPMs which need to override
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* one of these should run their pre-config hook after that of core.
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*/
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void mpm_common_pre_config(apr_pool_t *pconf)
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{
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ap_pid_fname = DEFAULT_PIDLOG;
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ap_max_requests_per_child = 0; /* unlimited */
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apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
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ap_coredumpdir_configured = 0;
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ap_graceful_shutdown_timeout = 0; /* unlimited */
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ap_max_mem_free = ALLOCATOR_MAX_FREE_DEFAULT;
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ap_thread_stacksize = 0; /* use system default */
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}
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/* number of calls to wait_or_timeout between writable probes */
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#ifndef INTERVAL_OF_WRITABLE_PROBES
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#define INTERVAL_OF_WRITABLE_PROBES 10
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#endif
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static int wait_or_timeout_counter;
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AP_DECLARE(void) ap_wait_or_timeout(apr_exit_why_e *status, int *exitcode,
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apr_proc_t *ret, apr_pool_t *p,
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server_rec *s)
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{
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apr_status_t rv;
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++wait_or_timeout_counter;
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if (wait_or_timeout_counter == INTERVAL_OF_WRITABLE_PROBES) {
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wait_or_timeout_counter = 0;
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ap_run_monitor(p, s);
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}
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rv = apr_proc_wait_all_procs(ret, exitcode, status, APR_NOWAIT, p);
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ap_update_global_status();
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if (APR_STATUS_IS_EINTR(rv)) {
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ret->pid = -1;
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return;
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}
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if (APR_STATUS_IS_CHILD_DONE(rv)) {
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return;
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}
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apr_sleep(apr_time_from_sec(1));
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ret->pid = -1;
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}
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#if defined(TCP_NODELAY)
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void ap_sock_disable_nagle(apr_socket_t *s)
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{
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/* The Nagle algorithm says that we should delay sending partial
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* packets in hopes of getting more data. We don't want to do
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* this; we are not telnet. There are bad interactions between
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* persistent connections and Nagle's algorithm that have very severe
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* performance penalties. (Failing to disable Nagle is not much of a
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* problem with simple HTTP.)
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*
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* In spite of these problems, failure here is not a shooting offense.
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*/
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apr_status_t status = apr_socket_opt_set(s, APR_TCP_NODELAY, 1);
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if (status != APR_SUCCESS) {
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ap_log_error(APLOG_MARK, APLOG_WARNING, status, ap_server_conf, APLOGNO(00542)
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"apr_socket_opt_set: (TCP_NODELAY)");
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}
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}
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#endif
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#ifdef HAVE_GETPWNAM
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AP_DECLARE(uid_t) ap_uname2id(const char *name)
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{
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struct passwd *ent;
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if (name[0] == '#')
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return (atoi(&name[1]));
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if (!(ent = getpwnam(name))) {
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ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00543)
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"%s: bad user name %s", ap_server_argv0, name);
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exit(1);
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}
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return (ent->pw_uid);
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}
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#endif
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#ifdef HAVE_GETGRNAM
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AP_DECLARE(gid_t) ap_gname2id(const char *name)
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{
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struct group *ent;
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if (name[0] == '#')
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return (atoi(&name[1]));
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if (!(ent = getgrnam(name))) {
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ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00544)
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"%s: bad group name %s", ap_server_argv0, name);
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exit(1);
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90a5c9 |
}
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90a5c9 |
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return (ent->gr_gid);
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}
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90a5c9 |
#endif
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90a5c9 |
|
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#ifndef HAVE_INITGROUPS
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Packit |
90a5c9 |
int initgroups(const char *name, gid_t basegid)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
#if defined(_OSD_POSIX) || defined(OS2) || defined(WIN32) || defined(NETWARE)
|
|
Packit |
90a5c9 |
return 0;
|
|
Packit |
90a5c9 |
#else
|
|
Packit |
90a5c9 |
gid_t groups[NGROUPS_MAX];
|
|
Packit |
90a5c9 |
struct group *g;
|
|
Packit |
90a5c9 |
int index = 0;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
setgrent();
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
groups[index++] = basegid;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
while (index < NGROUPS_MAX && ((g = getgrent()) != NULL)) {
|
|
Packit |
90a5c9 |
if (g->gr_gid != basegid) {
|
|
Packit |
90a5c9 |
char **names;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
for (names = g->gr_mem; *names != NULL; ++names) {
|
|
Packit |
90a5c9 |
if (!strcmp(*names, name))
|
|
Packit |
90a5c9 |
groups[index++] = g->gr_gid;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
endgrent();
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return setgroups(index, groups);
|
|
Packit |
90a5c9 |
#endif
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
#endif /* def HAVE_INITGROUPS */
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
/* standard mpm configuration handling */
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
const char *ap_mpm_set_pidfile(cmd_parms *cmd, void *dummy,
|
|
Packit |
90a5c9 |
const char *arg)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
Packit |
90a5c9 |
if (err != NULL) {
|
|
Packit |
90a5c9 |
return err;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (cmd->server->is_virtual) {
|
|
Packit |
90a5c9 |
return "PidFile directive not allowed in <VirtualHost>";
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
ap_pid_fname = arg;
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
void ap_mpm_dump_pidfile(apr_pool_t *p, apr_file_t *out)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
apr_file_printf(out, "PidFile: \"%s\"\n",
|
|
Packit |
90a5c9 |
ap_server_root_relative(p, ap_pid_fname));
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
const char *ap_mpm_set_max_requests(cmd_parms *cmd, void *dummy,
|
|
Packit |
90a5c9 |
const char *arg)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
Packit |
90a5c9 |
if (err != NULL) {
|
|
Packit |
90a5c9 |
return err;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (!strcasecmp(cmd->cmd->name, "MaxRequestsPerChild")) {
|
|
Packit |
90a5c9 |
ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO(00545)
|
|
Packit |
90a5c9 |
"MaxRequestsPerChild is deprecated, use "
|
|
Packit |
90a5c9 |
"MaxConnectionsPerChild instead.");
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
ap_max_requests_per_child = atoi(arg);
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
const char *ap_mpm_set_coredumpdir(cmd_parms *cmd, void *dummy,
|
|
Packit |
90a5c9 |
const char *arg)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
apr_finfo_t finfo;
|
|
Packit |
90a5c9 |
const char *fname;
|
|
Packit |
90a5c9 |
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
Packit |
90a5c9 |
if (err != NULL) {
|
|
Packit |
90a5c9 |
return err;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
fname = ap_server_root_relative(cmd->temp_pool, arg);
|
|
Packit |
90a5c9 |
if (!fname) {
|
|
Packit |
90a5c9 |
return apr_pstrcat(cmd->pool, "Invalid CoreDumpDirectory path ",
|
|
Packit |
90a5c9 |
arg, NULL);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
if (apr_stat(&finfo, fname, APR_FINFO_TYPE, cmd->pool) != APR_SUCCESS) {
|
|
Packit |
90a5c9 |
return apr_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
|
|
Packit |
90a5c9 |
" does not exist", NULL);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
if (finfo.filetype != APR_DIR) {
|
|
Packit |
90a5c9 |
return apr_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
|
|
Packit |
90a5c9 |
" is not a directory", NULL);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
apr_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
|
|
Packit |
90a5c9 |
ap_coredumpdir_configured = 1;
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
AP_DECLARE(const char *)ap_mpm_set_graceful_shutdown(cmd_parms *cmd,
|
|
Packit |
90a5c9 |
void *dummy,
|
|
Packit |
90a5c9 |
const char *arg)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
Packit |
90a5c9 |
if (err != NULL) {
|
|
Packit |
90a5c9 |
return err;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
ap_graceful_shutdown_timeout = atoi(arg);
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
const char *ap_mpm_set_max_mem_free(cmd_parms *cmd, void *dummy,
|
|
Packit |
90a5c9 |
const char *arg)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
long value;
|
|
Packit |
90a5c9 |
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
Packit |
90a5c9 |
if (err != NULL) {
|
|
Packit |
90a5c9 |
return err;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
errno = 0;
|
|
Packit |
90a5c9 |
value = strtol(arg, NULL, 10);
|
|
Packit |
90a5c9 |
if (value < 0 || errno == ERANGE)
|
|
Packit |
90a5c9 |
return apr_pstrcat(cmd->pool, "Invalid MaxMemFree value: ",
|
|
Packit |
90a5c9 |
arg, NULL);
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
ap_max_mem_free = (apr_uint32_t)value * 1024;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
const char *ap_mpm_set_thread_stacksize(cmd_parms *cmd, void *dummy,
|
|
Packit |
90a5c9 |
const char *arg)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
long value;
|
|
Packit |
90a5c9 |
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
|
|
Packit |
90a5c9 |
if (err != NULL) {
|
|
Packit |
90a5c9 |
return err;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
errno = 0;
|
|
Packit |
90a5c9 |
value = strtol(arg, NULL, 10);
|
|
Packit |
90a5c9 |
if (value < 0 || errno == ERANGE)
|
|
Packit |
90a5c9 |
return apr_pstrcat(cmd->pool, "Invalid ThreadStackSize value: ",
|
|
Packit |
90a5c9 |
arg, NULL);
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
ap_thread_stacksize = (apr_size_t)value;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
apr_status_t rv;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (ap_run_mpm_query(query_code, result, &rv) == DECLINED) {
|
|
Packit |
90a5c9 |
rv = APR_EGENERAL;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return rv;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
static void end_gen(mpm_gen_info_t *gi)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
ap_log_error(APLOG_MARK, APLOG_TRACE4, 0, ap_server_conf,
|
|
Packit |
90a5c9 |
"end of generation %d", gi->gen);
|
|
Packit |
90a5c9 |
ap_run_end_generation(ap_server_conf, gi->gen);
|
|
Packit |
90a5c9 |
APR_RING_REMOVE(gi, link);
|
|
Packit |
90a5c9 |
APR_RING_INSERT_HEAD(unused_geninfo, gi, mpm_gen_info_t, link);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
apr_status_t ap_mpm_end_gen_helper(void *unused) /* cleanup on pconf */
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
int gen = ap_config_generation - 1; /* differs from MPM generation */
|
|
Packit |
90a5c9 |
mpm_gen_info_t *cur;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (geninfo == NULL) {
|
|
Packit |
90a5c9 |
/* initial pconf teardown, MPM hasn't run */
|
|
Packit |
90a5c9 |
return APR_SUCCESS;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
cur = APR_RING_FIRST(geninfo);
|
|
Packit |
90a5c9 |
while (cur != APR_RING_SENTINEL(geninfo, mpm_gen_info_t, link) &&
|
|
Packit |
90a5c9 |
cur->gen != gen) {
|
|
Packit |
90a5c9 |
cur = APR_RING_NEXT(cur, link);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (cur == APR_RING_SENTINEL(geninfo, mpm_gen_info_t, link)) {
|
|
Packit |
90a5c9 |
/* last child of generation already exited */
|
|
Packit |
90a5c9 |
ap_log_error(APLOG_MARK, APLOG_TRACE4, 0, ap_server_conf,
|
|
Packit |
90a5c9 |
"no record of generation %d", gen);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
else {
|
|
Packit |
90a5c9 |
cur->done = 1;
|
|
Packit |
90a5c9 |
if (cur->active == 0) {
|
|
Packit |
90a5c9 |
end_gen(cur);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return APR_SUCCESS;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
/* core's child-status hook
|
|
Packit |
90a5c9 |
* tracks number of remaining children per generation and
|
|
Packit |
90a5c9 |
* runs the end-generation hook when the last child of
|
|
Packit |
90a5c9 |
* a generation exits
|
|
Packit |
90a5c9 |
*/
|
|
Packit |
90a5c9 |
void ap_core_child_status(server_rec *s, pid_t pid,
|
|
Packit |
90a5c9 |
ap_generation_t gen, int slot,
|
|
Packit |
90a5c9 |
mpm_child_status status)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
mpm_gen_info_t *cur;
|
|
Packit |
90a5c9 |
const char *status_msg = "unknown status";
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (!gen_head_init) { /* where to run this? */
|
|
Packit |
90a5c9 |
gen_head_init = 1;
|
|
Packit |
90a5c9 |
geninfo = apr_pcalloc(s->process->pool, sizeof *geninfo);
|
|
Packit |
90a5c9 |
unused_geninfo = apr_pcalloc(s->process->pool, sizeof *unused_geninfo);
|
|
Packit |
90a5c9 |
APR_RING_INIT(geninfo, mpm_gen_info_t, link);
|
|
Packit |
90a5c9 |
APR_RING_INIT(unused_geninfo, mpm_gen_info_t, link);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
cur = APR_RING_FIRST(geninfo);
|
|
Packit |
90a5c9 |
while (cur != APR_RING_SENTINEL(geninfo, mpm_gen_info_t, link) &&
|
|
Packit |
90a5c9 |
cur->gen != gen) {
|
|
Packit |
90a5c9 |
cur = APR_RING_NEXT(cur, link);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
switch(status) {
|
|
Packit |
90a5c9 |
case MPM_CHILD_STARTED:
|
|
Packit |
90a5c9 |
status_msg = "started";
|
|
Packit |
90a5c9 |
if (cur == APR_RING_SENTINEL(geninfo, mpm_gen_info_t, link)) {
|
|
Packit |
90a5c9 |
/* first child for this generation */
|
|
Packit |
90a5c9 |
if (!APR_RING_EMPTY(unused_geninfo, mpm_gen_info_t, link)) {
|
|
Packit |
90a5c9 |
cur = APR_RING_FIRST(unused_geninfo);
|
|
Packit |
90a5c9 |
APR_RING_REMOVE(cur, link);
|
|
Packit |
90a5c9 |
cur->active = cur->done = 0;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
else {
|
|
Packit |
90a5c9 |
cur = apr_pcalloc(s->process->pool, sizeof *cur);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
cur->gen = gen;
|
|
Packit |
90a5c9 |
APR_RING_ELEM_INIT(cur, link);
|
|
Packit |
90a5c9 |
APR_RING_INSERT_HEAD(geninfo, cur, mpm_gen_info_t, link);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
ap_random_parent_after_fork();
|
|
Packit |
90a5c9 |
++cur->active;
|
|
Packit |
90a5c9 |
break;
|
|
Packit |
90a5c9 |
case MPM_CHILD_EXITED:
|
|
Packit |
90a5c9 |
ap_update_global_status();
|
|
Packit |
90a5c9 |
status_msg = "exited";
|
|
Packit |
90a5c9 |
if (cur == APR_RING_SENTINEL(geninfo, mpm_gen_info_t, link)) {
|
|
Packit |
90a5c9 |
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00546)
|
|
Packit |
90a5c9 |
"no record of generation %d of exiting child %" APR_PID_T_FMT,
|
|
Packit |
90a5c9 |
gen, pid);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
else {
|
|
Packit |
90a5c9 |
--cur->active;
|
|
Packit |
90a5c9 |
if (!cur->active && cur->done) { /* no children, server has stopped/restarted */
|
|
Packit |
90a5c9 |
end_gen(cur);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
break;
|
|
Packit |
90a5c9 |
case MPM_CHILD_LOST_SLOT:
|
|
Packit |
90a5c9 |
status_msg = "lost slot";
|
|
Packit |
90a5c9 |
/* we don't track by slot, so it doesn't matter */
|
|
Packit |
90a5c9 |
break;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
ap_log_error(APLOG_MARK, APLOG_TRACE4, 0, s,
|
|
Packit |
90a5c9 |
"mpm child %" APR_PID_T_FMT " (gen %d/slot %d) %s",
|
|
Packit |
90a5c9 |
pid, gen, slot, status_msg);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
AP_DECLARE(apr_status_t) ap_mpm_register_timed_callback(apr_time_t t, ap_mpm_callback_fn_t *cbfn, void *baton)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
return ap_run_mpm_register_timed_callback(t, cbfn, baton);
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
AP_DECLARE(const char *)ap_show_mpm(void)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
const char *name = ap_run_mpm_get_name();
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (!name) {
|
|
Packit |
90a5c9 |
name = "";
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return name;
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
AP_DECLARE(const char *)ap_check_mpm(void)
|
|
Packit |
90a5c9 |
{
|
|
Packit |
90a5c9 |
static const char *last_mpm_name = NULL;
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (!_hooks.link_mpm || _hooks.link_mpm->nelts == 0)
|
|
Packit |
90a5c9 |
return "No MPM loaded.";
|
|
Packit |
90a5c9 |
else if (_hooks.link_mpm->nelts > 1)
|
|
Packit |
90a5c9 |
return "More than one MPM loaded.";
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
if (last_mpm_name) {
|
|
Packit |
90a5c9 |
if (strcmp(last_mpm_name, ap_show_mpm())) {
|
|
Packit |
90a5c9 |
return "The MPM cannot be changed during restart.";
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
else {
|
|
Packit |
90a5c9 |
last_mpm_name = apr_pstrdup(ap_pglobal, ap_show_mpm());
|
|
Packit |
90a5c9 |
}
|
|
Packit |
90a5c9 |
|
|
Packit |
90a5c9 |
return NULL;
|
|
Packit |
90a5c9 |
}
|