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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
commitfe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch)
treeb80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /server/mpm
parentInitial commit. (diff)
downloadapache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz
apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip
Adding upstream version 2.4.56.upstream/2.4.56
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'server/mpm')
-rw-r--r--server/mpm/MPM.NAMING14
-rw-r--r--server/mpm/Makefile.in4
-rw-r--r--server/mpm/config.m4128
-rw-r--r--server/mpm/config2.m489
-rw-r--r--server/mpm/event/Makefile.in1
-rw-r--r--server/mpm/event/config.m415
-rw-r--r--server/mpm/event/config3.m47
-rw-r--r--server/mpm/event/event.c4078
-rw-r--r--server/mpm/event/mpm_default.h56
-rw-r--r--server/mpm/mpmt_os2/Makefile.in1
-rw-r--r--server/mpm/mpmt_os2/config.m410
-rw-r--r--server/mpm/mpmt_os2/config5.m43
-rw-r--r--server/mpm/mpmt_os2/mpm_default.h57
-rw-r--r--server/mpm/mpmt_os2/mpmt_os2.c614
-rw-r--r--server/mpm/mpmt_os2/mpmt_os2_child.c490
-rw-r--r--server/mpm/netware/mpm_default.h78
-rw-r--r--server/mpm/netware/mpm_netware.c1365
-rw-r--r--server/mpm/prefork/Makefile.in1
-rw-r--r--server/mpm/prefork/config.m47
-rw-r--r--server/mpm/prefork/config3.m41
-rw-r--r--server/mpm/prefork/mpm_default.h51
-rw-r--r--server/mpm/prefork/prefork.c1563
-rw-r--r--server/mpm/winnt/Makefile.in1
-rw-r--r--server/mpm/winnt/child.c1306
-rw-r--r--server/mpm/winnt/config.m410
-rw-r--r--server/mpm/winnt/config3.m42
-rw-r--r--server/mpm/winnt/mpm_default.h60
-rw-r--r--server/mpm/winnt/mpm_winnt.c1783
-rw-r--r--server/mpm/winnt/mpm_winnt.h96
-rw-r--r--server/mpm/winnt/nt_eventlog.c172
-rw-r--r--server/mpm/winnt/service.c1241
-rw-r--r--server/mpm/worker/Makefile.in2
-rw-r--r--server/mpm/worker/config.m411
-rw-r--r--server/mpm/worker/config3.m45
-rw-r--r--server/mpm/worker/mpm_default.h55
-rw-r--r--server/mpm/worker/worker.c2455
36 files changed, 15832 insertions, 0 deletions
diff --git a/server/mpm/MPM.NAMING b/server/mpm/MPM.NAMING
new file mode 100644
index 0000000..c07884d
--- /dev/null
+++ b/server/mpm/MPM.NAMING
@@ -0,0 +1,14 @@
+
+The following MPMs currently exist:
+
+ prefork ....... Multi Process Model with Preforking (Apache 1.3)
+ mpmt_os2 ...... Multi Process Model with Threading on OS/2
+ Constant number of processes, variable number of threads.
+ One acceptor thread per process, multiple workers threads.
+ winnt ......... Single Process Model with Threading on Windows NT
+ event ......... Multi Process model with threads. One acceptor thread,
+ multiple worker threads, separate poller threads for idle
+ connections and asynchoneous write completion.
+ worker ........ Multi Process model with threads. One acceptor thread,
+ multiple worker threads.
+ netware ....... Multi-threaded MPM for Netware
diff --git a/server/mpm/Makefile.in b/server/mpm/Makefile.in
new file mode 100644
index 0000000..a158f8b
--- /dev/null
+++ b/server/mpm/Makefile.in
@@ -0,0 +1,4 @@
+
+SUBDIRS = $(MPM_SUBDIRS)
+
+include $(top_builddir)/build/rules.mk
diff --git a/server/mpm/config.m4 b/server/mpm/config.m4
new file mode 100644
index 0000000..6d3ab86
--- /dev/null
+++ b/server/mpm/config.m4
@@ -0,0 +1,128 @@
+dnl common platform checks needed by MPMs, methods for MPMs to state
+dnl their support for the platform, functions to query MPM properties
+
+APR_CHECK_APR_DEFINE(APR_HAS_THREADS)
+
+have_threaded_sig_graceful=yes
+case $host in
+ *-linux-*)
+ case `uname -r` in
+ 2.0* )
+ dnl Threaded MPM's are not supported on Linux 2.0
+ dnl as on 2.0 the linuxthreads library uses SIGUSR1
+ dnl and SIGUSR2 internally
+ have_threaded_sig_graceful=no
+ ;;
+ esac
+ ;;
+esac
+
+dnl See if APR supports APR_POLLSET_THREADSAFE.
+dnl XXX This hack tests for the underlying functions used by APR when it supports
+dnl XXX APR_POLLSET_THREADSAFE, and duplicates APR's Darwin version check.
+dnl A run-time check for
+dnl apr_pollset_create(,,APR_POLLSET_THREADSAFE) == APR_SUCCESS
+dnl would be great but an in-tree apr (srclib/apr) hasn't been built yet.
+
+AC_CACHE_CHECK([whether APR supports thread-safe pollsets], [ac_cv_have_threadsafe_pollset], [
+ case $host in
+ *-apple-darwin[[1-9]].*)
+ APR_SETIFNULL(ac_cv_func_kqueue, [no])
+ ;;
+ esac
+ AC_CHECK_FUNCS(kqueue port_create epoll_create)
+ if test "$ac_cv_func_kqueue$ac_cv_func_port_create$ac_cv_func_epoll_create" != "nonono"; then
+ ac_cv_have_threadsafe_pollset=yes
+ else
+ ac_cv_have_threadsafe_pollset=no
+ fi
+])
+
+dnl See if APR has skiplist
+dnl The base httpd prereq is APR 1.4.x, so we don't have to consider
+dnl earlier versions.
+case $APR_VERSION in
+ 1.4*)
+ apr_has_skiplist=no
+ ;;
+ *)
+ apr_has_skiplist=yes
+esac
+
+dnl See if this is a forking platform w.r.t. MPMs
+case $host in
+ *mingw32* | *os2-emx*)
+ forking_mpms_supported=no
+ ;;
+ *)
+ forking_mpms_supported=yes
+ ;;
+esac
+
+dnl APACHE_MPM_SUPPORTED(name, supports-shared, is_threaded)
+AC_DEFUN([APACHE_MPM_SUPPORTED],[
+ if test "$2" = "yes"; then
+ eval "ap_supported_mpm_$1=shared"
+ ap_supported_shared_mpms="$ap_supported_shared_mpms $1 "
+ else
+ eval "ap_supported_mpm_$1=static"
+ fi
+ if test "$3" = "yes"; then
+ eval "ap_threaded_mpm_$1=yes"
+ fi
+])dnl
+
+dnl APACHE_MPM_ENABLED(name)
+AC_DEFUN([APACHE_MPM_ENABLED],[
+ if ap_mpm_is_enabled $1; then
+ :
+ else
+ eval "ap_enabled_mpm_$1=yes"
+ ap_enabled_mpms="$ap_enabled_mpms $1 "
+ fi
+])dnl
+
+ap_mpm_is_supported ()
+{
+ eval "tmp=\$ap_supported_mpm_$1"
+ if test -z "$tmp"; then
+ return 1
+ else
+ return 0
+ fi
+}
+
+ap_mpm_supports_shared ()
+{
+ eval "tmp=\$ap_supported_mpm_$1"
+ if test "$tmp" = "shared"; then
+ return 0
+ else
+ return 1
+ fi
+}
+
+ap_mpm_is_threaded ()
+{
+ if test "$mpm_build" = "shared" -a ac_cv_define_APR_HAS_THREADS = "yes"; then
+ return 0
+ fi
+
+ for mpm in $ap_enabled_mpms; do
+ eval "tmp=\$ap_threaded_mpm_$mpm"
+ if test "$tmp" = "yes"; then
+ return 0
+ fi
+ done
+ return 1
+}
+
+ap_mpm_is_enabled ()
+{
+ eval "tmp=\$ap_enabled_mpm_$1"
+ if test "$tmp" = "yes"; then
+ return 0
+ else
+ return 1
+ fi
+}
diff --git a/server/mpm/config2.m4 b/server/mpm/config2.m4
new file mode 100644
index 0000000..d7e73ec
--- /dev/null
+++ b/server/mpm/config2.m4
@@ -0,0 +1,89 @@
+AC_MSG_CHECKING(which MPM to use by default)
+AC_ARG_WITH(mpm,
+APACHE_HELP_STRING(--with-mpm=MPM,Choose the process model for Apache to use by default.
+ MPM={event|worker|prefork|winnt}
+ This will be statically linked as the only available MPM unless
+ --enable-mpms-shared is also specified.
+),[
+ default_mpm=$withval
+ AC_MSG_RESULT($withval);
+],[
+ dnl Order of preference for default MPM:
+ dnl The Windows and OS/2 MPMs are used on those platforms.
+ dnl Everywhere else: event, worker, prefork
+ if ap_mpm_is_supported "winnt"; then
+ default_mpm=winnt
+ AC_MSG_RESULT(winnt)
+ elif ap_mpm_is_supported "mpmt_os2"; then
+ default_mpm=mpmt_os2
+ AC_MSG_RESULT(mpmt_os2)
+ elif ap_mpm_is_supported "event"; then
+ default_mpm=event
+ AC_MSG_RESULT(event)
+ elif ap_mpm_is_supported "worker"; then
+ default_mpm=worker
+ AC_MSG_RESULT(worker - event is not supported)
+ else
+ default_mpm=prefork
+ AC_MSG_RESULT(prefork - event and worker are not supported)
+ fi
+])
+
+APACHE_MPM_ENABLED($default_mpm)
+
+AC_ARG_ENABLE(mpms-shared,
+APACHE_HELP_STRING(--enable-mpms-shared=MPM-LIST,Space-separated list of MPM modules to enable for dynamic loading. MPM-LIST=list | "all"),[
+ if test "$enableval" = "no"; then
+ mpm_build=static
+ else
+ mpm_build=shared
+dnl Build just the default MPM if --enable-mpms-shared has no argument.
+ if test "$enableval" = "yes"; then
+ enableval=$default_mpm
+ fi
+ for i in $enableval; do
+ if test "$i" = "all"; then
+ for j in $ap_supported_shared_mpms; do
+ eval "enable_mpm_$j=shared"
+ APACHE_MPM_ENABLED($j)
+ done
+ else
+ i=`echo $i | sed 's/-/_/g'`
+ if ap_mpm_supports_shared $i; then
+ eval "enable_mpm_$i=shared"
+ APACHE_MPM_ENABLED($i)
+ else
+ AC_MSG_ERROR([MPM $i does not support dynamic loading.])
+ fi
+ fi
+ done
+ fi
+], [mpm_build=static])
+
+for i in $ap_enabled_mpms; do
+ if ap_mpm_is_supported $i; then
+ :
+ else
+ AC_MSG_ERROR([MPM $i is not supported on this platform.])
+ fi
+done
+
+if test $mpm_build = "shared"; then
+ eval "tmp=\$enable_mpm_$default_mpm"
+ if test "$tmp" != "shared"; then
+ AC_MSG_ERROR([The default MPM ($default_mpm) must be included in --enable-mpms-shared. Use --with-mpm to change the default MPM.])
+ fi
+fi
+
+APACHE_FAST_OUTPUT(server/mpm/Makefile)
+
+if test $mpm_build = "shared"; then
+ MPM_LIB=""
+else
+ MPM_LIB=server/mpm/$default_mpm/lib${default_mpm}.la
+ MODLIST="$MODLIST mpm_${default_mpm}"
+fi
+
+MPM_SUBDIRS=$ap_enabled_mpms
+APACHE_SUBST(MPM_SUBDIRS)
+APACHE_SUBST(MPM_LIB)
diff --git a/server/mpm/event/Makefile.in b/server/mpm/event/Makefile.in
new file mode 100644
index 0000000..f34af9c
--- /dev/null
+++ b/server/mpm/event/Makefile.in
@@ -0,0 +1 @@
+include $(top_srcdir)/build/special.mk
diff --git a/server/mpm/event/config.m4 b/server/mpm/event/config.m4
new file mode 100644
index 0000000..c891c75
--- /dev/null
+++ b/server/mpm/event/config.m4
@@ -0,0 +1,15 @@
+AC_MSG_CHECKING(if event MPM supports this platform)
+if test $forking_mpms_supported != yes; then
+ AC_MSG_RESULT(no - This is not a forking platform)
+elif test $ac_cv_define_APR_HAS_THREADS != yes; then
+ AC_MSG_RESULT(no - APR does not support threads)
+elif test $have_threaded_sig_graceful != yes; then
+ AC_MSG_RESULT(no - SIG_GRACEFUL cannot be used with a threaded MPM)
+elif test $ac_cv_have_threadsafe_pollset != yes; then
+ AC_MSG_RESULT(no - APR_POLLSET_THREADSAFE is not supported)
+elif test $apr_has_skiplist != yes; then
+ AC_MSG_RESULT(no - APR skiplist is not available, need APR 1.5.x or later)
+else
+ AC_MSG_RESULT(yes)
+ APACHE_MPM_SUPPORTED(event, yes, yes)
+fi
diff --git a/server/mpm/event/config3.m4 b/server/mpm/event/config3.m4
new file mode 100644
index 0000000..09d3626
--- /dev/null
+++ b/server/mpm/event/config3.m4
@@ -0,0 +1,7 @@
+dnl ## XXX - Need a more thorough check of the proper flags to use
+
+APACHE_SUBST(MOD_MPM_EVENT_LDADD)
+
+APACHE_MPM_MODULE(event, $enable_mpm_event, event.lo,[
+ AC_CHECK_FUNCS(pthread_kill)
+], , [\$(MOD_MPM_EVENT_LDADD)])
diff --git a/server/mpm/event/event.c b/server/mpm/event/event.c
new file mode 100644
index 0000000..3672f44
--- /dev/null
+++ b/server/mpm/event/event.c
@@ -0,0 +1,4078 @@
+/* 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.
+ */
+
+/**
+ * This MPM tries to fix the 'keep alive problem' in HTTP.
+ *
+ * After a client completes the first request, the client can keep the
+ * connection open to send more requests with the same socket. This can save
+ * significant overhead in creating TCP connections. However, the major
+ * disadvantage is that Apache traditionally keeps an entire child
+ * process/thread waiting for data from the client. To solve this problem,
+ * this MPM has a dedicated thread for handling both the Listening sockets,
+ * and all sockets that are in a Keep Alive status.
+ *
+ * The MPM assumes the underlying apr_pollset implementation is somewhat
+ * threadsafe. This currently is only compatible with KQueue and EPoll. This
+ * enables the MPM to avoid extra high level locking or having to wake up the
+ * listener thread when a keep-alive socket needs to be sent to it.
+ *
+ * This MPM does not perform well on older platforms that do not have very good
+ * threading, like Linux with a 2.4 kernel, but this does not matter, since we
+ * require EPoll or KQueue.
+ *
+ * For FreeBSD, use 5.3. It is possible to run this MPM on FreeBSD 5.2.1, if
+ * you use libkse (see `man libmap.conf`).
+ *
+ * For NetBSD, use at least 2.0.
+ *
+ * For Linux, you should use a 2.6 kernel, and make sure your glibc has epoll
+ * support compiled in.
+ *
+ */
+
+#include "apr.h"
+#include "apr_portable.h"
+#include "apr_strings.h"
+#include "apr_file_io.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+#include "apr_thread_mutex.h"
+#include "apr_poll.h"
+#include "apr_ring.h"
+#include "apr_queue.h"
+#include "apr_atomic.h"
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+#include "apr_version.h"
+
+#include <stdlib.h>
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if APR_HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+#ifdef HAVE_SYS_PROCESSOR_H
+#include <sys/processor.h> /* for bindprocessor() */
+#endif
+
+#if !APR_HAS_THREADS
+#error The Event MPM requires APR threads, but they are unavailable.
+#endif
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h" /* for read_config */
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "http_protocol.h"
+#include "ap_mpm.h"
+#include "mpm_common.h"
+#include "ap_listen.h"
+#include "scoreboard.h"
+#include "mpm_fdqueue.h"
+#include "mpm_default.h"
+#include "http_vhost.h"
+#include "unixd.h"
+#include "apr_skiplist.h"
+
+#include <signal.h>
+#include <limits.h> /* for INT_MAX */
+
+
+/* Limit on the total --- clients will be locked out if more servers than
+ * this are needed. It is intended solely to keep the server from crashing
+ * when things get out of hand.
+ *
+ * We keep a hard maximum number of servers, for two reasons --- first off,
+ * in case something goes seriously wrong, we want to stop the fork bomb
+ * short of actually crashing the machine we're running on by filling some
+ * kernel table. Secondly, it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_SERVER_LIMIT
+#define DEFAULT_SERVER_LIMIT 16
+#endif
+
+/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_SERVER_LIMIT
+#define MAX_SERVER_LIMIT 20000
+#endif
+
+/* Limit on the threads per process. Clients will be locked out if more than
+ * this are needed.
+ *
+ * We keep this for one reason it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_THREAD_LIMIT
+#define DEFAULT_THREAD_LIMIT 64
+#endif
+
+/* Admin can't tune ThreadLimit beyond MAX_THREAD_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_THREAD_LIMIT
+#define MAX_THREAD_LIMIT 100000
+#endif
+
+#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
+
+#if !APR_VERSION_AT_LEAST(1,4,0)
+#define apr_time_from_msec(x) (x * 1000)
+#endif
+
+#ifndef MAX_SECS_TO_LINGER
+#define MAX_SECS_TO_LINGER 30
+#endif
+#define SECONDS_TO_LINGER 2
+
+/*
+ * Actual definitions of config globals
+ */
+
+#ifndef DEFAULT_WORKER_FACTOR
+#define DEFAULT_WORKER_FACTOR 2
+#endif
+#define WORKER_FACTOR_SCALE 16 /* scale factor to allow fractional values */
+static unsigned int worker_factor = DEFAULT_WORKER_FACTOR * WORKER_FACTOR_SCALE;
+ /* AsyncRequestWorkerFactor * 16 */
+
+static int threads_per_child = 0; /* ThreadsPerChild */
+static int ap_daemons_to_start = 0; /* StartServers */
+static int min_spare_threads = 0; /* MinSpareThreads */
+static int max_spare_threads = 0; /* MaxSpareThreads */
+static int active_daemons_limit = 0; /* MaxRequestWorkers / ThreadsPerChild */
+static int max_workers = 0; /* MaxRequestWorkers */
+static int server_limit = 0; /* ServerLimit */
+static int thread_limit = 0; /* ThreadLimit */
+static int had_healthy_child = 0;
+static volatile int dying = 0;
+static volatile int workers_may_exit = 0;
+static volatile int start_thread_may_exit = 0;
+static volatile int listener_may_exit = 0;
+static int listener_is_wakeable = 0; /* Pollset supports APR_POLLSET_WAKEABLE */
+static int num_listensocks = 0;
+static apr_int32_t conns_this_child; /* MaxConnectionsPerChild, only access
+ in listener thread */
+static apr_uint32_t connection_count = 0; /* Number of open connections */
+static apr_uint32_t lingering_count = 0; /* Number of connections in lingering close */
+static apr_uint32_t suspended_count = 0; /* Number of suspended connections */
+static apr_uint32_t clogged_count = 0; /* Number of threads processing ssl conns */
+static apr_uint32_t threads_shutdown = 0; /* Number of threads that have shutdown
+ early during graceful termination */
+static int resource_shortage = 0;
+static fd_queue_t *worker_queue;
+static fd_queue_info_t *worker_queue_info;
+
+static apr_thread_mutex_t *timeout_mutex;
+
+module AP_MODULE_DECLARE_DATA mpm_event_module;
+
+/* forward declare */
+struct event_srv_cfg_s;
+typedef struct event_srv_cfg_s event_srv_cfg;
+
+static apr_pollfd_t *listener_pollfd;
+
+/*
+ * The pollset for sockets that are in any of the timeout queues. Currently
+ * we use the timeout_mutex to make sure that connections are added/removed
+ * atomically to/from both event_pollset and a timeout queue. Otherwise
+ * some confusion can happen under high load if timeout queues and pollset
+ * get out of sync.
+ * XXX: It should be possible to make the lock unnecessary in many or even all
+ * XXX: cases.
+ */
+static apr_pollset_t *event_pollset;
+
+typedef struct event_conn_state_t event_conn_state_t;
+
+/*
+ * The chain of connections to be shutdown by a worker thread (deferred),
+ * linked list updated atomically.
+ */
+static event_conn_state_t *volatile defer_linger_chain;
+
+struct event_conn_state_t {
+ /** APR_RING of expiration timeouts */
+ APR_RING_ENTRY(event_conn_state_t) timeout_list;
+ /** the time when the entry was queued */
+ apr_time_t queue_timestamp;
+ /** connection record this struct refers to */
+ conn_rec *c;
+ /** request record (if any) this struct refers to */
+ request_rec *r;
+ /** server config this struct refers to */
+ event_srv_cfg *sc;
+ /** scoreboard handle for the conn_rec */
+ ap_sb_handle_t *sbh;
+ /** is the current conn_rec suspended? (disassociated with
+ * a particular MPM thread; for suspend_/resume_connection
+ * hooks)
+ */
+ int suspended;
+ /** memory pool to allocate from */
+ apr_pool_t *p;
+ /** bucket allocator */
+ apr_bucket_alloc_t *bucket_alloc;
+ /** poll file descriptor information */
+ apr_pollfd_t pfd;
+ /** public parts of the connection state */
+ conn_state_t pub;
+ /** chaining in defer_linger_chain */
+ struct event_conn_state_t *chain;
+ /** Is lingering close from defer_lingering_close()? */
+ int deferred_linger;
+};
+
+APR_RING_HEAD(timeout_head_t, event_conn_state_t);
+
+struct timeout_queue {
+ struct timeout_head_t head;
+ apr_interval_time_t timeout;
+ apr_uint32_t count; /* for this queue */
+ apr_uint32_t *total; /* for all chained/related queues */
+ struct timeout_queue *next; /* chaining */
+};
+/*
+ * Several timeout queues that use different timeouts, so that we always can
+ * simply append to the end.
+ * write_completion_q uses vhost's TimeOut
+ * keepalive_q uses vhost's KeepAliveTimeOut
+ * linger_q uses MAX_SECS_TO_LINGER
+ * short_linger_q uses SECONDS_TO_LINGER
+ */
+static struct timeout_queue *write_completion_q,
+ *keepalive_q,
+ *linger_q,
+ *short_linger_q;
+static volatile apr_time_t queues_next_expiry;
+
+/* Prevent extra poll/wakeup calls for timeouts close in the future (queues
+ * have the granularity of a second anyway).
+ * XXX: Wouldn't 0.5s (instead of 0.1s) be "enough"?
+ */
+#define TIMEOUT_FUDGE_FACTOR apr_time_from_msec(100)
+
+/*
+ * Macros for accessing struct timeout_queue.
+ * For TO_QUEUE_APPEND and TO_QUEUE_REMOVE, timeout_mutex must be held.
+ */
+static void TO_QUEUE_APPEND(struct timeout_queue *q, event_conn_state_t *el)
+{
+ apr_time_t elem_expiry;
+ apr_time_t next_expiry;
+
+ APR_RING_INSERT_TAIL(&q->head, el, event_conn_state_t, timeout_list);
+ ++*q->total;
+ ++q->count;
+
+ /* Cheaply update the global queues_next_expiry with the one of the
+ * first entry of this queue (oldest) if it expires before.
+ */
+ el = APR_RING_FIRST(&q->head);
+ elem_expiry = el->queue_timestamp + q->timeout;
+ next_expiry = queues_next_expiry;
+ if (!next_expiry || next_expiry > elem_expiry + TIMEOUT_FUDGE_FACTOR) {
+ queues_next_expiry = elem_expiry;
+ /* Unblock the poll()ing listener for it to update its timeout. */
+ if (listener_is_wakeable) {
+ apr_pollset_wakeup(event_pollset);
+ }
+ }
+}
+
+static void TO_QUEUE_REMOVE(struct timeout_queue *q, event_conn_state_t *el)
+{
+ APR_RING_REMOVE(el, timeout_list);
+ APR_RING_ELEM_INIT(el, timeout_list);
+ --*q->total;
+ --q->count;
+}
+
+static struct timeout_queue *TO_QUEUE_MAKE(apr_pool_t *p, apr_time_t t,
+ struct timeout_queue *ref)
+{
+ struct timeout_queue *q;
+
+ q = apr_pcalloc(p, sizeof *q);
+ APR_RING_INIT(&q->head, event_conn_state_t, timeout_list);
+ q->total = (ref) ? ref->total : apr_pcalloc(p, sizeof *q->total);
+ q->timeout = t;
+
+ return q;
+}
+
+#define TO_QUEUE_ELEM_INIT(el) \
+ APR_RING_ELEM_INIT((el), timeout_list)
+
+/* The structure used to pass unique initialization info to each thread */
+typedef struct
+{
+ int pslot; /* process slot */
+ int tslot; /* worker slot of the thread */
+} proc_info;
+
+/* Structure used to pass information to the thread responsible for
+ * creating the rest of the threads.
+ */
+typedef struct
+{
+ apr_thread_t **threads;
+ apr_thread_t *listener;
+ int child_num_arg;
+ apr_threadattr_t *threadattr;
+} thread_starter;
+
+typedef enum
+{
+ PT_CSD,
+ PT_ACCEPT
+} poll_type_e;
+
+typedef struct
+{
+ poll_type_e type;
+ void *baton;
+} listener_poll_type;
+
+/* data retained by event across load/unload of the module
+ * allocated on first call to pre-config hook; located on
+ * subsequent calls to pre-config hook
+ */
+typedef struct event_retained_data {
+ ap_unixd_mpm_retained_data *mpm;
+
+ int first_server_limit;
+ int first_thread_limit;
+ int sick_child_detected;
+ int maxclients_reported;
+ int near_maxclients_reported;
+ /*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxRequestWorkers changes across AP_SIG_GRACEFUL restarts.
+ * We use this value to optimize routines that have to scan the entire
+ * scoreboard.
+ */
+ int max_daemon_used;
+
+ /*
+ * All running workers, active and shutting down, including those that
+ * may be left from before a graceful restart.
+ * Not kept up-to-date when shutdown is pending.
+ */
+ int total_daemons;
+ /*
+ * Workers that still active, i.e. are not shutting down gracefully.
+ */
+ int active_daemons;
+ /*
+ * idle_spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers. It is
+ * maintained per listeners bucket, doubled up to MAX_SPAWN_RATE, and
+ * reset only when a cycle goes by without the need to spawn.
+ */
+ int *idle_spawn_rate;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (32)
+#endif
+ int hold_off_on_exponential_spawning;
+} event_retained_data;
+static event_retained_data *retained;
+
+typedef struct event_child_bucket {
+ ap_pod_t *pod;
+ ap_listen_rec *listeners;
+} event_child_bucket;
+static event_child_bucket *all_buckets, /* All listeners buckets */
+ *my_bucket; /* Current child bucket */
+
+struct event_srv_cfg_s {
+ struct timeout_queue *wc_q,
+ *ka_q;
+};
+
+#define ID_FROM_CHILD_THREAD(c, t) ((c * thread_limit) + t)
+
+/* The event MPM respects a couple of runtime flags that can aid
+ * in debugging. Setting the -DNO_DETACH flag will prevent the root process
+ * from detaching from its controlling terminal. Additionally, setting
+ * the -DONE_PROCESS flag (which implies -DNO_DETACH) will get you the
+ * child_main loop running in the process which originally started up.
+ * This gives you a pretty nice debugging environment. (You'll get a SIGHUP
+ * early in standalone_main; just continue through. This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+#ifdef DEBUG_SIGSTOP
+int raise_sigstop_flags;
+#endif
+
+static apr_pool_t *pconf; /* Pool for config stuff */
+static apr_pool_t *pchild; /* Pool for httpd child stuff */
+static apr_pool_t *pruntime; /* Pool for MPM threads stuff */
+
+static pid_t ap_my_pid; /* Linux getpid() doesn't work except in main
+ thread. Use this instead */
+static pid_t parent_pid;
+static apr_os_thread_t *listener_os_thread;
+
+static int ap_child_slot; /* Current child process slot in scoreboard */
+
+/* The LISTENER_SIGNAL signal will be sent from the main thread to the
+ * listener thread to wake it up for graceful termination (what a child
+ * process from an old generation does when the admin does "apachectl
+ * graceful"). This signal will be blocked in all threads of a child
+ * process except for the listener thread.
+ */
+#define LISTENER_SIGNAL SIGHUP
+
+/* An array of socket descriptors in use by each thread used to
+ * perform a non-graceful (forced) shutdown of the server.
+ */
+static apr_socket_t **worker_sockets;
+
+static volatile apr_uint32_t listensocks_disabled;
+
+static void disable_listensocks(void)
+{
+ int i;
+ if (apr_atomic_cas32(&listensocks_disabled, 1, 0) != 0) {
+ return;
+ }
+ if (event_pollset) {
+ for (i = 0; i < num_listensocks; i++) {
+ apr_pollset_remove(event_pollset, &listener_pollfd[i]);
+ }
+ }
+ ap_scoreboard_image->parent[ap_child_slot].not_accepting = 1;
+}
+
+static void enable_listensocks(void)
+{
+ int i;
+ if (listener_may_exit
+ || apr_atomic_cas32(&listensocks_disabled, 0, 1) != 1) {
+ return;
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00457)
+ "Accepting new connections again: "
+ "%u active conns (%u lingering/%u clogged/%u suspended), "
+ "%u idle workers",
+ apr_atomic_read32(&connection_count),
+ apr_atomic_read32(&lingering_count),
+ apr_atomic_read32(&clogged_count),
+ apr_atomic_read32(&suspended_count),
+ ap_queue_info_num_idlers(worker_queue_info));
+ for (i = 0; i < num_listensocks; i++)
+ apr_pollset_add(event_pollset, &listener_pollfd[i]);
+ /*
+ * XXX: This is not yet optimal. If many workers suddenly become available,
+ * XXX: the parent may kill some processes off too soon.
+ */
+ ap_scoreboard_image->parent[ap_child_slot].not_accepting = 0;
+}
+
+static APR_INLINE apr_uint32_t listeners_disabled(void)
+{
+ return apr_atomic_read32(&listensocks_disabled);
+}
+
+static APR_INLINE int connections_above_limit(int *busy)
+{
+ apr_uint32_t i_count = ap_queue_info_num_idlers(worker_queue_info);
+ if (i_count > 0) {
+ apr_uint32_t c_count = apr_atomic_read32(&connection_count);
+ apr_uint32_t l_count = apr_atomic_read32(&lingering_count);
+ if (c_count <= l_count
+ /* Off by 'listeners_disabled()' to avoid flip flop */
+ || c_count - l_count < (apr_uint32_t)threads_per_child +
+ (i_count - listeners_disabled()) *
+ (worker_factor / WORKER_FACTOR_SCALE)) {
+ return 0;
+ }
+ }
+ else if (busy) {
+ *busy = 1;
+ }
+ return 1;
+}
+
+static APR_INLINE int should_enable_listensocks(void)
+{
+ return !dying && listeners_disabled() && !connections_above_limit(NULL);
+}
+
+static void close_socket_nonblocking_(apr_socket_t *csd,
+ const char *from, int line)
+{
+ apr_status_t rv;
+ apr_os_sock_t fd = -1;
+
+ /* close_worker_sockets() may have closed it already */
+ rv = apr_os_sock_get(&fd, csd);
+ ap_log_error(APLOG_MARK, APLOG_TRACE8, 0, ap_server_conf,
+ "closing socket %i/%pp from %s:%i", (int)fd, csd, from, line);
+ if (rv == APR_SUCCESS && fd == -1) {
+ return;
+ }
+
+ apr_socket_timeout_set(csd, 0);
+ rv = apr_socket_close(csd);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00468)
+ "error closing socket");
+ AP_DEBUG_ASSERT(0);
+ }
+}
+#define close_socket_nonblocking(csd) \
+ close_socket_nonblocking_(csd, __FUNCTION__, __LINE__)
+
+static void close_worker_sockets(void)
+{
+ int i;
+ for (i = 0; i < threads_per_child; i++) {
+ apr_socket_t *csd = worker_sockets[i];
+ if (csd) {
+ worker_sockets[i] = NULL;
+ close_socket_nonblocking(csd);
+ }
+ }
+}
+
+static void wakeup_listener(void)
+{
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "wake up listener%s", listener_may_exit ? " again" : "");
+
+ listener_may_exit = 1;
+ disable_listensocks();
+
+ /* Unblock the listener if it's poll()ing */
+ if (event_pollset && listener_is_wakeable) {
+ apr_pollset_wakeup(event_pollset);
+ }
+
+ /* unblock the listener if it's waiting for a worker */
+ if (worker_queue_info) {
+ ap_queue_info_term(worker_queue_info);
+ }
+
+ if (!listener_os_thread) {
+ /* XXX there is an obscure path that this doesn't handle perfectly:
+ * right after listener thread is created but before
+ * listener_os_thread is set, the first worker thread hits an
+ * error and starts graceful termination
+ */
+ return;
+ }
+ /*
+ * we should just be able to "kill(ap_my_pid, LISTENER_SIGNAL)" on all
+ * platforms and wake up the listener thread since it is the only thread
+ * with SIGHUP unblocked, but that doesn't work on Linux
+ */
+#ifdef HAVE_PTHREAD_KILL
+ pthread_kill(*listener_os_thread, LISTENER_SIGNAL);
+#else
+ kill(ap_my_pid, LISTENER_SIGNAL);
+#endif
+}
+
+#define ST_INIT 0
+#define ST_GRACEFUL 1
+#define ST_UNGRACEFUL 2
+
+static int terminate_mode = ST_INIT;
+
+static void signal_threads(int mode)
+{
+ if (terminate_mode >= mode) {
+ return;
+ }
+ terminate_mode = mode;
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+
+ /* in case we weren't called from the listener thread, wake up the
+ * listener thread
+ */
+ wakeup_listener();
+
+ /* for ungraceful termination, let the workers exit now;
+ * for graceful termination, the listener thread will notify the
+ * workers to exit once it has stopped accepting new connections
+ */
+ if (mode == ST_UNGRACEFUL) {
+ workers_may_exit = 1;
+ ap_queue_interrupt_all(worker_queue);
+ close_worker_sockets(); /* forcefully kill all current connections */
+ }
+
+ ap_run_child_stopping(pchild, mode == ST_GRACEFUL);
+}
+
+static int event_query(int query_code, int *result, apr_status_t *rv)
+{
+ *rv = APR_SUCCESS;
+ switch (query_code) {
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = retained->max_daemon_used;
+ break;
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_STATIC;
+ break;
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_DYNAMIC;
+ break;
+ case AP_MPMQ_IS_ASYNC:
+ *result = 1;
+ break;
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = server_limit;
+ break;
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = thread_limit;
+ break;
+ case AP_MPMQ_MAX_THREADS:
+ *result = threads_per_child;
+ break;
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MIN_SPARE_THREADS:
+ *result = min_spare_threads;
+ break;
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_THREADS:
+ *result = max_spare_threads;
+ break;
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = ap_max_requests_per_child;
+ break;
+ case AP_MPMQ_MAX_DAEMONS:
+ *result = active_daemons_limit;
+ break;
+ case AP_MPMQ_MPM_STATE:
+ *result = retained->mpm->mpm_state;
+ break;
+ case AP_MPMQ_GENERATION:
+ *result = retained->mpm->my_generation;
+ break;
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+ return OK;
+}
+
+static void event_note_child_stopped(int slot, pid_t pid, ap_generation_t gen)
+{
+ if (slot != -1) { /* child had a scoreboard slot? */
+ process_score *ps = &ap_scoreboard_image->parent[slot];
+ int i;
+
+ pid = ps->pid;
+ gen = ps->generation;
+ for (i = 0; i < threads_per_child; i++) {
+ ap_update_child_status_from_indexes(slot, i, SERVER_DEAD, NULL);
+ }
+ ap_run_child_status(ap_server_conf, pid, gen, slot, MPM_CHILD_EXITED);
+ if (ps->quiescing != 2) { /* vs perform_idle_server_maintenance() */
+ retained->active_daemons--;
+ }
+ retained->total_daemons--;
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "Child %d stopped: pid %d, gen %d, "
+ "active %d/%d, total %d/%d/%d, quiescing %d",
+ slot, (int)pid, (int)gen,
+ retained->active_daemons, active_daemons_limit,
+ retained->total_daemons, retained->max_daemon_used,
+ server_limit, ps->quiescing);
+ ps->not_accepting = 0;
+ ps->quiescing = 0;
+ ps->pid = 0;
+ }
+ else {
+ ap_run_child_status(ap_server_conf, pid, gen, -1, MPM_CHILD_EXITED);
+ }
+}
+
+static void event_note_child_started(int slot, pid_t pid)
+{
+ ap_generation_t gen = retained->mpm->my_generation;
+
+ retained->total_daemons++;
+ retained->active_daemons++;
+ ap_scoreboard_image->parent[slot].pid = pid;
+ ap_scoreboard_image->parent[slot].generation = gen;
+ ap_run_child_status(ap_server_conf, pid, gen, slot, MPM_CHILD_STARTED);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "Child %d started: pid %d, gen %d, "
+ "active %d/%d, total %d/%d/%d",
+ slot, (int)pid, (int)gen,
+ retained->active_daemons, active_daemons_limit,
+ retained->total_daemons, retained->max_daemon_used,
+ server_limit);
+}
+
+static const char *event_get_name(void)
+{
+ return "event";
+}
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code) __attribute__ ((noreturn));
+static void clean_child_exit(int code)
+{
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ if (terminate_mode == ST_INIT) {
+ ap_run_child_stopping(pchild, 0);
+ }
+
+ if (pchild) {
+ apr_pool_destroy(pchild);
+ }
+
+ if (one_process) {
+ event_note_child_stopped(/* slot */ 0, 0, 0);
+ }
+
+ exit(code);
+}
+
+static void just_die(int sig)
+{
+ clean_child_exit(0);
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static int child_fatal;
+
+static apr_status_t decrement_connection_count(void *cs_)
+{
+ int is_last_connection;
+ event_conn_state_t *cs = cs_;
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE8, 0, cs->c,
+ "cleanup connection from state %i", (int)cs->pub.state);
+ switch (cs->pub.state) {
+ case CONN_STATE_LINGER:
+ case CONN_STATE_LINGER_NORMAL:
+ case CONN_STATE_LINGER_SHORT:
+ apr_atomic_dec32(&lingering_count);
+ break;
+ case CONN_STATE_SUSPENDED:
+ apr_atomic_dec32(&suspended_count);
+ break;
+ default:
+ break;
+ }
+ /* Unblock the listener if it's waiting for connection_count = 0,
+ * or if the listening sockets were disabled due to limits and can
+ * now accept new connections.
+ */
+ is_last_connection = !apr_atomic_dec32(&connection_count);
+ if (listener_is_wakeable
+ && ((is_last_connection && listener_may_exit)
+ || should_enable_listensocks())) {
+ apr_pollset_wakeup(event_pollset);
+ }
+ if (dying) {
+ /* Help worker_thread_should_exit_early() */
+ ap_queue_interrupt_one(worker_queue);
+ }
+ return APR_SUCCESS;
+}
+
+static void notify_suspend(event_conn_state_t *cs)
+{
+ ap_run_suspend_connection(cs->c, cs->r);
+ cs->c->sbh = NULL;
+ cs->suspended = 1;
+}
+
+static void notify_resume(event_conn_state_t *cs, int cleanup)
+{
+ cs->suspended = 0;
+ cs->c->sbh = cleanup ? NULL : cs->sbh;
+ ap_run_resume_connection(cs->c, cs->r);
+}
+
+/*
+ * Defer flush and close of the connection by adding it to defer_linger_chain,
+ * for a worker to grab it and do the job (should that be blocking).
+ * Pre-condition: nonblocking, can be called from anywhere provided cs is not
+ * in any timeout queue or in the pollset.
+ */
+static int defer_lingering_close(event_conn_state_t *cs)
+{
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE6, 0, cs->c,
+ "deferring close from state %i", (int)cs->pub.state);
+
+ /* The connection is not shutdown() yet strictly speaking, but it's not
+ * in any queue nor handled by a worker either (will be very soon), so
+ * to account for it somewhere we bump lingering_count now (and set
+ * deferred_linger for process_lingering_close() to know).
+ */
+ cs->pub.state = CONN_STATE_LINGER;
+ apr_atomic_inc32(&lingering_count);
+ cs->deferred_linger = 1;
+ for (;;) {
+ event_conn_state_t *chain = cs->chain = defer_linger_chain;
+ if (apr_atomic_casptr((void *)&defer_linger_chain, cs,
+ chain) != chain) {
+ /* Race lost, try again */
+ continue;
+ }
+ return 1;
+ }
+}
+
+/* Close the connection and release its resources (ptrans), either because an
+ * unrecoverable error occured (queues or pollset add/remove) or more usually
+ * if lingering close timed out.
+ * Pre-condition: nonblocking, can be called from anywhere provided cs is not
+ * in any timeout queue or in the pollset.
+ */
+static void close_connection(event_conn_state_t *cs)
+{
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE6, 0, cs->c,
+ "closing connection from state %i", (int)cs->pub.state);
+
+ close_socket_nonblocking(cs->pfd.desc.s);
+ ap_queue_info_push_pool(worker_queue_info, cs->p);
+}
+
+/* Shutdown the connection in case of timeout, error or resources shortage.
+ * This starts short lingering close if not already there, or directly closes
+ * the connection otherwise.
+ * Pre-condition: nonblocking, can be called from anywhere provided cs is not
+ * in any timeout queue or in the pollset.
+ */
+static int shutdown_connection(event_conn_state_t *cs)
+{
+ if (cs->pub.state < CONN_STATE_LINGER) {
+ apr_table_setn(cs->c->notes, "short-lingering-close", "1");
+ defer_lingering_close(cs);
+ }
+ else {
+ close_connection(cs);
+ }
+ return 1;
+}
+
+/*
+ * This runs before any non-MPM cleanup code on the connection;
+ * if the connection is currently suspended as far as modules
+ * know, provide notification of resumption.
+ */
+static apr_status_t ptrans_pre_cleanup(void *dummy)
+{
+ event_conn_state_t *cs = dummy;
+
+ if (cs->suspended) {
+ notify_resume(cs, 1);
+ }
+ return APR_SUCCESS;
+}
+
+/*
+ * event_pre_read_request() and event_request_cleanup() track the
+ * current r for a given connection.
+ */
+static apr_status_t event_request_cleanup(void *dummy)
+{
+ conn_rec *c = dummy;
+ event_conn_state_t *cs = ap_get_module_config(c->conn_config,
+ &mpm_event_module);
+
+ cs->r = NULL;
+ return APR_SUCCESS;
+}
+
+static void event_pre_read_request(request_rec *r, conn_rec *c)
+{
+ event_conn_state_t *cs = ap_get_module_config(c->conn_config,
+ &mpm_event_module);
+
+ cs->r = r;
+ cs->sc = ap_get_module_config(ap_server_conf->module_config,
+ &mpm_event_module);
+ apr_pool_cleanup_register(r->pool, c, event_request_cleanup,
+ apr_pool_cleanup_null);
+}
+
+/*
+ * event_post_read_request() tracks the current server config for a
+ * given request.
+ */
+static int event_post_read_request(request_rec *r)
+{
+ conn_rec *c = r->connection;
+ event_conn_state_t *cs = ap_get_module_config(c->conn_config,
+ &mpm_event_module);
+
+ /* To preserve legacy behaviour (consistent with other MPMs), use
+ * the keepalive timeout from the base server (first on this IP:port)
+ * when none is explicitly configured on this server.
+ */
+ if (r->server->keep_alive_timeout_set) {
+ cs->sc = ap_get_module_config(r->server->module_config,
+ &mpm_event_module);
+ }
+ else {
+ cs->sc = ap_get_module_config(c->base_server->module_config,
+ &mpm_event_module);
+ }
+ return OK;
+}
+
+/* Forward declare */
+static void process_lingering_close(event_conn_state_t *cs);
+
+static void update_reqevents_from_sense(event_conn_state_t *cs, int sense)
+{
+ if (sense < 0) {
+ sense = cs->pub.sense;
+ }
+ if (sense == CONN_SENSE_WANT_READ) {
+ cs->pfd.reqevents = APR_POLLIN | APR_POLLHUP;
+ }
+ else {
+ cs->pfd.reqevents = APR_POLLOUT;
+ }
+ /* POLLERR is usually returned event only, but some pollset
+ * backends may require it in reqevents to do the right thing,
+ * so it shouldn't hurt (ignored otherwise).
+ */
+ cs->pfd.reqevents |= APR_POLLERR;
+
+ /* Reset to default for the next round */
+ cs->pub.sense = CONN_SENSE_DEFAULT;
+}
+
+/*
+ * process one connection in the worker
+ */
+static void process_socket(apr_thread_t *thd, apr_pool_t * p, apr_socket_t * sock,
+ event_conn_state_t * cs, int my_child_num,
+ int my_thread_num)
+{
+ conn_rec *c;
+ long conn_id = ID_FROM_CHILD_THREAD(my_child_num, my_thread_num);
+ int clogging = 0;
+ apr_status_t rv;
+ int rc = OK;
+
+ if (cs == NULL) { /* This is a new connection */
+ listener_poll_type *pt = apr_pcalloc(p, sizeof(*pt));
+ cs = apr_pcalloc(p, sizeof(event_conn_state_t));
+ cs->bucket_alloc = apr_bucket_alloc_create(p);
+ ap_create_sb_handle(&cs->sbh, p, my_child_num, my_thread_num);
+ c = ap_run_create_connection(p, ap_server_conf, sock,
+ conn_id, cs->sbh, cs->bucket_alloc);
+ if (!c) {
+ ap_queue_info_push_pool(worker_queue_info, p);
+ return;
+ }
+ apr_atomic_inc32(&connection_count);
+ apr_pool_cleanup_register(c->pool, cs, decrement_connection_count,
+ apr_pool_cleanup_null);
+ ap_set_module_config(c->conn_config, &mpm_event_module, cs);
+ c->current_thread = thd;
+ c->cs = &cs->pub;
+ cs->c = c;
+ cs->p = p;
+ cs->sc = ap_get_module_config(ap_server_conf->module_config,
+ &mpm_event_module);
+ cs->pfd.desc_type = APR_POLL_SOCKET;
+ cs->pfd.desc.s = sock;
+ update_reqevents_from_sense(cs, CONN_SENSE_WANT_READ);
+ pt->type = PT_CSD;
+ pt->baton = cs;
+ cs->pfd.client_data = pt;
+ apr_pool_pre_cleanup_register(p, cs, ptrans_pre_cleanup);
+ TO_QUEUE_ELEM_INIT(cs);
+
+ ap_update_vhost_given_ip(c);
+
+ rc = ap_pre_connection(c, sock);
+ if (rc != OK && rc != DONE) {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(00469)
+ "process_socket: connection aborted");
+ }
+
+ /**
+ * XXX If the platform does not have a usable way of bundling
+ * accept() with a socket readability check, like Win32,
+ * and there are measurable delays before the
+ * socket is readable due to the first data packet arriving,
+ * it might be better to create the cs on the listener thread
+ * with the state set to CONN_STATE_CHECK_REQUEST_LINE_READABLE
+ *
+ * FreeBSD users will want to enable the HTTP accept filter
+ * module in their kernel for the highest performance
+ * When the accept filter is active, sockets are kept in the
+ * kernel until a HTTP request is received.
+ */
+ cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
+
+ cs->pub.sense = CONN_SENSE_DEFAULT;
+ rc = OK;
+ }
+ else {
+ c = cs->c;
+ ap_update_sb_handle(cs->sbh, my_child_num, my_thread_num);
+ notify_resume(cs, 0);
+ c->current_thread = thd;
+ /* Subsequent request on a conn, and thread number is part of ID */
+ c->id = conn_id;
+ }
+
+ if (c->aborted) {
+ /* do lingering close below */
+ cs->pub.state = CONN_STATE_LINGER;
+ }
+ else if (cs->pub.state >= CONN_STATE_LINGER) {
+ /* fall through */
+ }
+ else {
+ if (cs->pub.state == CONN_STATE_READ_REQUEST_LINE
+ /* If we have an input filter which 'clogs' the input stream,
+ * like mod_ssl used to, lets just do the normal read from input
+ * filters, like the Worker MPM does. Filters that need to write
+ * where they would otherwise read, or read where they would
+ * otherwise write, should set the sense appropriately.
+ */
+ || c->clogging_input_filters) {
+read_request:
+ clogging = c->clogging_input_filters;
+ if (clogging) {
+ apr_atomic_inc32(&clogged_count);
+ }
+ rc = ap_run_process_connection(c);
+ if (clogging) {
+ apr_atomic_dec32(&clogged_count);
+ }
+ if (cs->pub.state > CONN_STATE_LINGER) {
+ cs->pub.state = CONN_STATE_LINGER;
+ }
+ if (rc == DONE) {
+ rc = OK;
+ }
+ }
+ }
+ /*
+ * The process_connection hooks above should set the connection state
+ * appropriately upon return, for event MPM to either:
+ * - do lingering close (CONN_STATE_LINGER),
+ * - wait for readability of the next request with respect to the keepalive
+ * timeout (state CONN_STATE_CHECK_REQUEST_LINE_READABLE),
+ * - wait for read/write-ability of the underlying socket with respect to
+ * its timeout by setting c->clogging_input_filters to 1 and the sense
+ * to CONN_SENSE_WANT_READ/WRITE (state CONN_STATE_WRITE_COMPLETION),
+ * - keep flushing the output filters stack in nonblocking mode, and then
+ * if required wait for read/write-ability of the underlying socket with
+ * respect to its own timeout (state CONN_STATE_WRITE_COMPLETION); since
+ * completion at some point may require reads (e.g. SSL_ERROR_WANT_READ),
+ * an output filter can also set the sense to CONN_SENSE_WANT_READ at any
+ * time for event MPM to do the right thing,
+ * - suspend the connection (SUSPENDED) such that it now interacts with
+ * the MPM through suspend/resume_connection() hooks, and/or registered
+ * poll callbacks (PT_USER), and/or registered timed callbacks triggered
+ * by timer events.
+ * If a process_connection hook returns an error or no hook sets the state
+ * to one of the above expected value, we forcibly close the connection w/
+ * CONN_STATE_LINGER. This covers the cases where no process_connection
+ * hook executes (DECLINED), or one returns OK w/o touching the state (i.e.
+ * CONN_STATE_READ_REQUEST_LINE remains after the call) which can happen
+ * with third-party modules not updated to work specifically with event MPM
+ * while this was expected to do lingering close unconditionally with
+ * worker or prefork MPMs for instance.
+ */
+ if (rc != OK || (cs->pub.state >= CONN_STATE_NUM)
+ || (cs->pub.state < CONN_STATE_LINGER
+ && cs->pub.state != CONN_STATE_WRITE_COMPLETION
+ && cs->pub.state != CONN_STATE_CHECK_REQUEST_LINE_READABLE
+ && cs->pub.state != CONN_STATE_SUSPENDED)) {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(10111)
+ "process_socket: connection processing %s: closing",
+ rc ? apr_psprintf(c->pool, "returned error %i", rc)
+ : apr_psprintf(c->pool, "unexpected state %i",
+ (int)cs->pub.state));
+ cs->pub.state = CONN_STATE_LINGER;
+ }
+
+ if (cs->pub.state == CONN_STATE_WRITE_COMPLETION) {
+ ap_filter_t *output_filter = c->output_filters;
+ apr_status_t rv;
+ ap_update_child_status(cs->sbh, SERVER_BUSY_WRITE, NULL);
+ while (output_filter->next != NULL) {
+ output_filter = output_filter->next;
+ }
+ rv = output_filter->frec->filter_func.out_func(output_filter, NULL);
+ if (rv != APR_SUCCESS) {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(00470)
+ "network write failure in core output filter");
+ cs->pub.state = CONN_STATE_LINGER;
+ }
+ else if (c->data_in_output_filters ||
+ cs->pub.sense == CONN_SENSE_WANT_READ) {
+ /* Still in WRITE_COMPLETION_STATE:
+ * Set a read/write timeout for this connection, and let the
+ * event thread poll for read/writeability.
+ */
+ cs->queue_timestamp = apr_time_now();
+ notify_suspend(cs);
+
+ update_reqevents_from_sense(cs, -1);
+ apr_thread_mutex_lock(timeout_mutex);
+ TO_QUEUE_APPEND(cs->sc->wc_q, cs);
+ rv = apr_pollset_add(event_pollset, &cs->pfd);
+ if (rv != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rv)) {
+ AP_DEBUG_ASSERT(0);
+ TO_QUEUE_REMOVE(cs->sc->wc_q, cs);
+ apr_thread_mutex_unlock(timeout_mutex);
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(03465)
+ "process_socket: apr_pollset_add failure for "
+ "write completion");
+ close_connection(cs);
+ signal_threads(ST_GRACEFUL);
+ }
+ else {
+ apr_thread_mutex_unlock(timeout_mutex);
+ }
+ return;
+ }
+ else if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted) {
+ cs->pub.state = CONN_STATE_LINGER;
+ }
+ else if (c->data_in_input_filters) {
+ cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
+ goto read_request;
+ }
+ else if (!listener_may_exit) {
+ cs->pub.state = CONN_STATE_CHECK_REQUEST_LINE_READABLE;
+ }
+ else {
+ cs->pub.state = CONN_STATE_LINGER;
+ }
+ }
+
+ if (cs->pub.state == CONN_STATE_CHECK_REQUEST_LINE_READABLE) {
+ ap_update_child_status(cs->sbh, SERVER_BUSY_KEEPALIVE, NULL);
+
+ /* It greatly simplifies the logic to use a single timeout value per q
+ * because the new element can just be added to the end of the list and
+ * it will stay sorted in expiration time sequence. If brand new
+ * sockets are sent to the event thread for a readability check, this
+ * will be a slight behavior change - they use the non-keepalive
+ * timeout today. With a normal client, the socket will be readable in
+ * a few milliseconds anyway.
+ */
+ cs->queue_timestamp = apr_time_now();
+ notify_suspend(cs);
+
+ /* Add work to pollset. */
+ update_reqevents_from_sense(cs, CONN_SENSE_WANT_READ);
+ apr_thread_mutex_lock(timeout_mutex);
+ TO_QUEUE_APPEND(cs->sc->ka_q, cs);
+ rv = apr_pollset_add(event_pollset, &cs->pfd);
+ if (rv != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rv)) {
+ AP_DEBUG_ASSERT(0);
+ TO_QUEUE_REMOVE(cs->sc->ka_q, cs);
+ apr_thread_mutex_unlock(timeout_mutex);
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(03093)
+ "process_socket: apr_pollset_add failure for "
+ "keep alive");
+ close_connection(cs);
+ signal_threads(ST_GRACEFUL);
+ }
+ else {
+ apr_thread_mutex_unlock(timeout_mutex);
+ }
+ return;
+ }
+
+ if (cs->pub.state == CONN_STATE_SUSPENDED) {
+ apr_atomic_inc32(&suspended_count);
+ notify_suspend(cs);
+ return;
+ }
+
+ /* CONN_STATE_LINGER[_*] fall through process_lingering_close() */
+ if (cs->pub.state >= CONN_STATE_LINGER) {
+ process_lingering_close(cs);
+ return;
+ }
+}
+
+/* conns_this_child has gone to zero or below. See if the admin coded
+ "MaxConnectionsPerChild 0", and keep going in that case. Doing it this way
+ simplifies the hot path in worker_thread */
+static void check_infinite_requests(void)
+{
+ if (ap_max_requests_per_child) {
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "Stopping process due to MaxConnectionsPerChild");
+ signal_threads(ST_GRACEFUL);
+ }
+ else {
+ /* keep going */
+ conns_this_child = APR_INT32_MAX;
+ }
+}
+
+static int close_listeners(int *closed)
+{
+ ap_log_error(APLOG_MARK, APLOG_TRACE6, 0, ap_server_conf,
+ "clos%s listeners (connection_count=%u)",
+ *closed ? "ed" : "ing", apr_atomic_read32(&connection_count));
+ if (!*closed) {
+ int i;
+
+ ap_close_listeners_ex(my_bucket->listeners);
+ *closed = 1; /* once */
+
+ dying = 1;
+ ap_scoreboard_image->parent[ap_child_slot].quiescing = 1;
+ for (i = 0; i < threads_per_child; ++i) {
+ ap_update_child_status_from_indexes(ap_child_slot, i,
+ SERVER_GRACEFUL, NULL);
+ }
+ /* wake up the main thread */
+ kill(ap_my_pid, SIGTERM);
+
+ ap_queue_info_free_idle_pools(worker_queue_info);
+ ap_queue_interrupt_all(worker_queue);
+
+ return 1;
+ }
+ return 0;
+}
+
+static void unblock_signal(int sig)
+{
+ sigset_t sig_mask;
+
+ sigemptyset(&sig_mask);
+ sigaddset(&sig_mask, sig);
+#if defined(SIGPROCMASK_SETS_THREAD_MASK)
+ sigprocmask(SIG_UNBLOCK, &sig_mask, NULL);
+#else
+ pthread_sigmask(SIG_UNBLOCK, &sig_mask, NULL);
+#endif
+}
+
+static void dummy_signal_handler(int sig)
+{
+ /* XXX If specifying SIG_IGN is guaranteed to unblock a syscall,
+ * then we don't need this goofy function.
+ */
+}
+
+
+static apr_status_t push_timer2worker(timer_event_t* te)
+{
+ return ap_queue_push_timer(worker_queue, te);
+}
+
+/*
+ * Pre-condition: cs is neither in event_pollset nor a timeout queue
+ * this function may only be called by the listener
+ */
+static apr_status_t push2worker(event_conn_state_t *cs, apr_socket_t *csd,
+ apr_pool_t *ptrans)
+{
+ apr_status_t rc;
+
+ if (cs) {
+ csd = cs->pfd.desc.s;
+ ptrans = cs->p;
+ }
+ rc = ap_queue_push_socket(worker_queue, csd, cs, ptrans);
+ if (rc != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rc, ap_server_conf, APLOGNO(00471)
+ "push2worker: ap_queue_push_socket failed");
+ /* trash the connection; we couldn't queue the connected
+ * socket to a worker
+ */
+ if (cs) {
+ shutdown_connection(cs);
+ }
+ else {
+ if (csd) {
+ close_socket_nonblocking(csd);
+ }
+ if (ptrans) {
+ ap_queue_info_push_pool(worker_queue_info, ptrans);
+ }
+ }
+ signal_threads(ST_GRACEFUL);
+ }
+
+ return rc;
+}
+
+/* get_worker:
+ * If *have_idle_worker_p == 0, reserve a worker thread, and set
+ * *have_idle_worker_p = 1.
+ * If *have_idle_worker_p is already 1, will do nothing.
+ * If blocking == 1, block if all workers are currently busy.
+ * If no worker was available immediately, will set *all_busy to 1.
+ * XXX: If there are no workers, we should not block immediately but
+ * XXX: close all keep-alive connections first.
+ */
+static void get_worker(int *have_idle_worker_p, int blocking, int *all_busy)
+{
+ apr_status_t rc;
+
+ if (*have_idle_worker_p) {
+ /* already reserved a worker thread - must have hit a
+ * transient error on a previous pass
+ */
+ return;
+ }
+
+ if (blocking)
+ rc = ap_queue_info_wait_for_idler(worker_queue_info, all_busy);
+ else
+ rc = ap_queue_info_try_get_idler(worker_queue_info);
+
+ if (rc == APR_SUCCESS || APR_STATUS_IS_EOF(rc)) {
+ *have_idle_worker_p = 1;
+ }
+ else if (!blocking && rc == APR_EAGAIN) {
+ *all_busy = 1;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rc, ap_server_conf, APLOGNO(00472)
+ "ap_queue_info_wait_for_idler failed. "
+ "Attempting to shutdown process gracefully");
+ signal_threads(ST_GRACEFUL);
+ }
+}
+
+/* Structures to reuse */
+static timer_event_t timer_free_ring;
+
+static apr_skiplist *timer_skiplist;
+static volatile apr_time_t timers_next_expiry;
+
+/* Same goal as for TIMEOUT_FUDGE_FACTOR (avoid extra poll calls), but applied
+ * to timers. Since their timeouts are custom (user defined), we can't be too
+ * approximative here (hence using 0.01s).
+ */
+#define EVENT_FUDGE_FACTOR apr_time_from_msec(10)
+
+/* The following compare function is used by apr_skiplist_insert() to keep the
+ * elements (timers) sorted and provide O(log n) complexity (this is also true
+ * for apr_skiplist_{find,remove}(), but those are not used in MPM event where
+ * inserted timers are not searched nor removed, but with apr_skiplist_pop()
+ * which does use any compare function). It is meant to return 0 when a == b,
+ * <0 when a < b, and >0 when a > b. However apr_skiplist_insert() will not
+ * add duplicates (i.e. a == b), and apr_skiplist_add() is only available in
+ * APR 1.6, yet multiple timers could possibly be created in the same micro-
+ * second (duplicates with regard to apr_time_t); therefore we implement the
+ * compare function to return +1 instead of 0 when compared timers are equal,
+ * thus duplicates are still added after each other (in order of insertion).
+ */
+static int timer_comp(void *a, void *b)
+{
+ apr_time_t t1 = (apr_time_t) ((timer_event_t *)a)->when;
+ apr_time_t t2 = (apr_time_t) ((timer_event_t *)b)->when;
+ AP_DEBUG_ASSERT(t1);
+ AP_DEBUG_ASSERT(t2);
+ return ((t1 < t2) ? -1 : 1);
+}
+
+static apr_thread_mutex_t *g_timer_skiplist_mtx;
+
+static apr_status_t event_register_timed_callback(apr_time_t t,
+ ap_mpm_callback_fn_t *cbfn,
+ void *baton)
+{
+ timer_event_t *te;
+ /* oh yeah, and make locking smarter/fine grained. */
+ apr_thread_mutex_lock(g_timer_skiplist_mtx);
+
+ if (!APR_RING_EMPTY(&timer_free_ring.link, timer_event_t, link)) {
+ te = APR_RING_FIRST(&timer_free_ring.link);
+ APR_RING_REMOVE(te, link);
+ }
+ else {
+ te = apr_skiplist_alloc(timer_skiplist, sizeof(timer_event_t));
+ APR_RING_ELEM_INIT(te, link);
+ }
+
+ te->cbfunc = cbfn;
+ te->baton = baton;
+ /* XXXXX: optimize */
+ te->when = t + apr_time_now();
+
+ {
+ apr_time_t next_expiry;
+
+ /* Okay, add sorted by when.. */
+ apr_skiplist_insert(timer_skiplist, te);
+
+ /* Cheaply update the global timers_next_expiry with this event's
+ * if it expires before.
+ */
+ next_expiry = timers_next_expiry;
+ if (!next_expiry || next_expiry > te->when + EVENT_FUDGE_FACTOR) {
+ timers_next_expiry = te->when;
+ /* Unblock the poll()ing listener for it to update its timeout. */
+ if (listener_is_wakeable) {
+ apr_pollset_wakeup(event_pollset);
+ }
+ }
+ }
+
+ apr_thread_mutex_unlock(g_timer_skiplist_mtx);
+
+ return APR_SUCCESS;
+}
+
+
+/*
+ * Flush data and close our side of the connection, then drain incoming data.
+ * If the latter would block put the connection in one of the linger timeout
+ * queues to be called back when ready, and repeat until it's closed by peer.
+ * Only to be called in the worker thread, and since it's in immediate call
+ * stack, we can afford a comfortable buffer size to consume data quickly.
+ * Pre-condition: cs is not in any timeout queue and not in the pollset,
+ * timeout_mutex is not locked
+ */
+#define LINGERING_BUF_SIZE (32 * 1024)
+static void process_lingering_close(event_conn_state_t *cs)
+{
+ apr_socket_t *csd = ap_get_conn_socket(cs->c);
+ char dummybuf[LINGERING_BUF_SIZE];
+ apr_size_t nbytes;
+ apr_status_t rv;
+ struct timeout_queue *q;
+
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE6, 0, cs->c,
+ "lingering close from state %i", (int)cs->pub.state);
+ AP_DEBUG_ASSERT(cs->pub.state >= CONN_STATE_LINGER);
+
+ if (cs->pub.state == CONN_STATE_LINGER) {
+ /* defer_lingering_close() may have bumped lingering_count already */
+ if (!cs->deferred_linger) {
+ apr_atomic_inc32(&lingering_count);
+ }
+
+ apr_socket_timeout_set(csd, apr_time_from_sec(SECONDS_TO_LINGER));
+ if (ap_start_lingering_close(cs->c)) {
+ notify_suspend(cs);
+ close_connection(cs);
+ return;
+ }
+
+ cs->queue_timestamp = apr_time_now();
+ /* Clear APR_INCOMPLETE_READ if it was ever set, we'll do the poll()
+ * at the listener only from now, if needed.
+ */
+ apr_socket_opt_set(csd, APR_INCOMPLETE_READ, 0);
+ /*
+ * If some module requested a shortened waiting period, only wait for
+ * 2s (SECONDS_TO_LINGER). This is useful for mitigating certain
+ * DoS attacks.
+ */
+ if (apr_table_get(cs->c->notes, "short-lingering-close")) {
+ cs->pub.state = CONN_STATE_LINGER_SHORT;
+ }
+ else {
+ cs->pub.state = CONN_STATE_LINGER_NORMAL;
+ }
+ notify_suspend(cs);
+ }
+
+ apr_socket_timeout_set(csd, 0);
+ do {
+ nbytes = sizeof(dummybuf);
+ rv = apr_socket_recv(csd, dummybuf, &nbytes);
+ } while (rv == APR_SUCCESS);
+
+ if (!APR_STATUS_IS_EAGAIN(rv)) {
+ close_connection(cs);
+ return;
+ }
+
+ /* (Re)queue the connection to come back when readable */
+ update_reqevents_from_sense(cs, CONN_SENSE_WANT_READ);
+ q = (cs->pub.state == CONN_STATE_LINGER_SHORT) ? short_linger_q : linger_q;
+ apr_thread_mutex_lock(timeout_mutex);
+ TO_QUEUE_APPEND(q, cs);
+ rv = apr_pollset_add(event_pollset, &cs->pfd);
+ if (rv != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rv)) {
+ AP_DEBUG_ASSERT(0);
+ TO_QUEUE_REMOVE(q, cs);
+ apr_thread_mutex_unlock(timeout_mutex);
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(03092)
+ "process_lingering_close: apr_pollset_add failure");
+ close_connection(cs);
+ signal_threads(ST_GRACEFUL);
+ return;
+ }
+ apr_thread_mutex_unlock(timeout_mutex);
+}
+
+/* call 'func' for all elements of 'q' above 'expiry'.
+ * Pre-condition: timeout_mutex must already be locked
+ * Post-condition: timeout_mutex will be locked again
+ */
+static void process_timeout_queue(struct timeout_queue *q, apr_time_t expiry,
+ int (*func)(event_conn_state_t *))
+{
+ apr_uint32_t total = 0, count;
+ event_conn_state_t *first, *cs, *last;
+ struct event_conn_state_t trash;
+ struct timeout_queue *qp;
+ apr_status_t rv;
+
+ if (!*q->total) {
+ return;
+ }
+
+ APR_RING_INIT(&trash.timeout_list, event_conn_state_t, timeout_list);
+ for (qp = q; qp; qp = qp->next) {
+ count = 0;
+ cs = first = last = APR_RING_FIRST(&qp->head);
+ while (cs != APR_RING_SENTINEL(&qp->head, event_conn_state_t,
+ timeout_list)) {
+ /* Trash the entry if:
+ * - no expiry was given (zero means all), or
+ * - it expired (according to the queue timeout), or
+ * - the system clock skewed in the past: no entry should be
+ * registered above the given expiry (~now) + the queue
+ * timeout, we won't keep any here (eg. for centuries).
+ *
+ * Otherwise stop, no following entry will match thanks to the
+ * single timeout per queue (entries are added to the end!).
+ * This allows maintenance in O(1).
+ */
+ if (expiry && cs->queue_timestamp + qp->timeout > expiry
+ && cs->queue_timestamp < expiry + qp->timeout) {
+ /* Since this is the next expiring entry of this queue, update
+ * the global queues_next_expiry if it's later than this one.
+ */
+ apr_time_t elem_expiry = cs->queue_timestamp + qp->timeout;
+ apr_time_t next_expiry = queues_next_expiry;
+ if (!next_expiry
+ || next_expiry > elem_expiry + TIMEOUT_FUDGE_FACTOR) {
+ queues_next_expiry = elem_expiry;
+ }
+ break;
+ }
+
+ last = cs;
+ rv = apr_pollset_remove(event_pollset, &cs->pfd);
+ if (rv != APR_SUCCESS && !APR_STATUS_IS_NOTFOUND(rv)) {
+ AP_DEBUG_ASSERT(0);
+ ap_log_cerror(APLOG_MARK, APLOG_ERR, rv, cs->c, APLOGNO(00473)
+ "apr_pollset_remove failed");
+ }
+ cs = APR_RING_NEXT(cs, timeout_list);
+ count++;
+ }
+ if (!count)
+ continue;
+
+ APR_RING_UNSPLICE(first, last, timeout_list);
+ APR_RING_SPLICE_TAIL(&trash.timeout_list, first, last, event_conn_state_t,
+ timeout_list);
+ AP_DEBUG_ASSERT(*q->total >= count && qp->count >= count);
+ *q->total -= count;
+ qp->count -= count;
+ total += count;
+ }
+ if (!total)
+ return;
+
+ apr_thread_mutex_unlock(timeout_mutex);
+ first = APR_RING_FIRST(&trash.timeout_list);
+ do {
+ cs = APR_RING_NEXT(first, timeout_list);
+ TO_QUEUE_ELEM_INIT(first);
+ func(first);
+ first = cs;
+ } while (--total);
+ apr_thread_mutex_lock(timeout_mutex);
+}
+
+static void process_keepalive_queue(apr_time_t expiry)
+{
+ /* If all workers are busy, we kill older keep-alive connections so
+ * that they may connect to another process.
+ */
+ if (!expiry && *keepalive_q->total) {
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "All workers are busy or dying, will shutdown %u "
+ "keep-alive connections", *keepalive_q->total);
+ }
+ process_timeout_queue(keepalive_q, expiry, shutdown_connection);
+}
+
+static void * APR_THREAD_FUNC listener_thread(apr_thread_t * thd, void *dummy)
+{
+ apr_status_t rc;
+ proc_info *ti = dummy;
+ int process_slot = ti->pslot;
+ struct process_score *ps = ap_get_scoreboard_process(process_slot);
+ int closed = 0;
+ int have_idle_worker = 0;
+ apr_time_t last_log;
+
+ last_log = apr_time_now();
+ free(ti);
+
+ /* Unblock the signal used to wake this thread up, and set a handler for
+ * it.
+ */
+ apr_signal(LISTENER_SIGNAL, dummy_signal_handler);
+ unblock_signal(LISTENER_SIGNAL);
+
+ for (;;) {
+ timer_event_t *te;
+ const apr_pollfd_t *out_pfd;
+ apr_int32_t num = 0;
+ apr_interval_time_t timeout;
+ apr_time_t now, expiry = -1;
+ int workers_were_busy = 0;
+
+ if (conns_this_child <= 0)
+ check_infinite_requests();
+
+ if (listener_may_exit) {
+ int first_close = close_listeners(&closed);
+
+ if (terminate_mode == ST_UNGRACEFUL
+ || apr_atomic_read32(&connection_count) == 0)
+ break;
+
+ /* Don't wait in poll() for the first close (i.e. dying now), we
+ * want to maintain the queues and schedule defer_linger_chain ASAP
+ * to kill kept-alive connection and shutdown the workers and child
+ * faster.
+ */
+ if (first_close) {
+ goto do_maintenance; /* with expiry == -1 */
+ }
+ }
+
+ now = apr_time_now();
+ if (APLOGtrace6(ap_server_conf)) {
+ /* trace log status every second */
+ if (now - last_log > apr_time_from_sec(1)) {
+ last_log = now;
+ apr_thread_mutex_lock(timeout_mutex);
+ ap_log_error(APLOG_MARK, APLOG_TRACE6, 0, ap_server_conf,
+ "connections: %u (clogged: %u write-completion: %d "
+ "keep-alive: %d lingering: %d suspended: %u)",
+ apr_atomic_read32(&connection_count),
+ apr_atomic_read32(&clogged_count),
+ apr_atomic_read32(write_completion_q->total),
+ apr_atomic_read32(keepalive_q->total),
+ apr_atomic_read32(&lingering_count),
+ apr_atomic_read32(&suspended_count));
+ if (dying) {
+ ap_log_error(APLOG_MARK, APLOG_TRACE6, 0, ap_server_conf,
+ "%u/%u workers shutdown",
+ apr_atomic_read32(&threads_shutdown),
+ threads_per_child);
+ }
+ apr_thread_mutex_unlock(timeout_mutex);
+ }
+ }
+
+ /* Start with an infinite poll() timeout and update it according to
+ * the next expiring timer or queue entry. If there are none, either
+ * the listener is wakeable and it can poll() indefinitely until a wake
+ * up occurs, otherwise periodic checks (maintenance, shutdown, ...)
+ * must be performed.
+ */
+ now = apr_time_now();
+ timeout = -1;
+
+ /* Push expired timers to a worker, the first remaining one determines
+ * the maximum time to poll() below, if any.
+ */
+ expiry = timers_next_expiry;
+ if (expiry && expiry < now) {
+ apr_thread_mutex_lock(g_timer_skiplist_mtx);
+ while ((te = apr_skiplist_peek(timer_skiplist))) {
+ if (te->when > now) {
+ timers_next_expiry = te->when;
+ timeout = te->when - now;
+ break;
+ }
+ apr_skiplist_pop(timer_skiplist, NULL);
+ push_timer2worker(te);
+ }
+ if (!te) {
+ timers_next_expiry = 0;
+ }
+ apr_thread_mutex_unlock(g_timer_skiplist_mtx);
+ }
+
+ /* Same for queues, use their next expiry, if any. */
+ expiry = queues_next_expiry;
+ if (expiry
+ && (timeout < 0
+ || expiry <= now
+ || timeout > expiry - now)) {
+ timeout = expiry > now ? expiry - now : 0;
+ }
+
+ /* When non-wakeable, don't wait more than 100 ms, in any case. */
+#define NON_WAKEABLE_POLL_TIMEOUT apr_time_from_msec(100)
+ if (!listener_is_wakeable
+ && (timeout < 0
+ || timeout > NON_WAKEABLE_POLL_TIMEOUT)) {
+ timeout = NON_WAKEABLE_POLL_TIMEOUT;
+ }
+ else if (timeout > 0) {
+ /* apr_pollset_poll() might round down the timeout to milliseconds,
+ * let's forcibly round up here to never return before the timeout.
+ */
+ timeout = apr_time_from_msec(
+ apr_time_as_msec(timeout + apr_time_from_msec(1) - 1)
+ );
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_TRACE7, 0, ap_server_conf,
+ "polling with timeout=%" APR_TIME_T_FMT
+ " queues_timeout=%" APR_TIME_T_FMT
+ " timers_timeout=%" APR_TIME_T_FMT,
+ timeout, queues_next_expiry - now,
+ timers_next_expiry - now);
+
+ rc = apr_pollset_poll(event_pollset, timeout, &num, &out_pfd);
+ if (rc != APR_SUCCESS) {
+ if (!APR_STATUS_IS_EINTR(rc) && !APR_STATUS_IS_TIMEUP(rc)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rc, ap_server_conf,
+ "apr_pollset_poll failed. Attempting to "
+ "shutdown process gracefully");
+ signal_threads(ST_GRACEFUL);
+ }
+ num = 0;
+ }
+
+ if (APLOGtrace7(ap_server_conf)) {
+ now = apr_time_now();
+ ap_log_error(APLOG_MARK, APLOG_TRACE7, rc, ap_server_conf,
+ "polled with num=%u exit=%d/%d conns=%d"
+ " queues_timeout=%" APR_TIME_T_FMT
+ " timers_timeout=%" APR_TIME_T_FMT,
+ num, listener_may_exit, dying,
+ apr_atomic_read32(&connection_count),
+ queues_next_expiry - now, timers_next_expiry - now);
+ }
+
+ /* XXX possible optimization: stash the current time for use as
+ * r->request_time for new requests or queues maintenance
+ */
+
+ for (; num; --num, ++out_pfd) {
+ listener_poll_type *pt = (listener_poll_type *) out_pfd->client_data;
+ if (pt->type == PT_CSD) {
+ /* one of the sockets is readable */
+ event_conn_state_t *cs = (event_conn_state_t *) pt->baton;
+ struct timeout_queue *remove_from_q = NULL;
+ /* don't wait for a worker for a keepalive request or
+ * lingering close processing. */
+ int blocking = 0;
+
+ switch (cs->pub.state) {
+ case CONN_STATE_WRITE_COMPLETION:
+ remove_from_q = cs->sc->wc_q;
+ blocking = 1;
+ break;
+
+ case CONN_STATE_CHECK_REQUEST_LINE_READABLE:
+ cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
+ remove_from_q = cs->sc->ka_q;
+ break;
+
+ case CONN_STATE_LINGER_NORMAL:
+ remove_from_q = linger_q;
+ break;
+
+ case CONN_STATE_LINGER_SHORT:
+ remove_from_q = short_linger_q;
+ break;
+
+ default:
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
+ ap_server_conf, APLOGNO(03096)
+ "event_loop: unexpected state %d",
+ cs->pub.state);
+ ap_assert(0);
+ }
+
+ if (remove_from_q) {
+ apr_thread_mutex_lock(timeout_mutex);
+ TO_QUEUE_REMOVE(remove_from_q, cs);
+ rc = apr_pollset_remove(event_pollset, &cs->pfd);
+ apr_thread_mutex_unlock(timeout_mutex);
+ /*
+ * Some of the pollset backends, like KQueue or Epoll
+ * automagically remove the FD if the socket is closed,
+ * therefore, we can accept _SUCCESS or _NOTFOUND,
+ * and we still want to keep going
+ */
+ if (rc != APR_SUCCESS && !APR_STATUS_IS_NOTFOUND(rc)) {
+ AP_DEBUG_ASSERT(0);
+ ap_log_error(APLOG_MARK, APLOG_ERR, rc, ap_server_conf,
+ APLOGNO(03094) "pollset remove failed");
+ close_connection(cs);
+ signal_threads(ST_GRACEFUL);
+ break;
+ }
+
+ /* If we don't get a worker immediately (nonblocking), we
+ * close the connection; the client can re-connect to a
+ * different process for keepalive, and for lingering close
+ * the connection will be shutdown so the choice is to favor
+ * incoming/alive connections.
+ */
+ get_worker(&have_idle_worker, blocking,
+ &workers_were_busy);
+ if (!have_idle_worker) {
+ shutdown_connection(cs);
+ }
+ else if (push2worker(cs, NULL, NULL) == APR_SUCCESS) {
+ have_idle_worker = 0;
+ }
+ }
+ }
+ else if (pt->type == PT_ACCEPT && !listeners_disabled()) {
+ /* A Listener Socket is ready for an accept() */
+ if (workers_were_busy) {
+ disable_listensocks();
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "All workers busy, not accepting new conns "
+ "in this process");
+ }
+ else if (connections_above_limit(&workers_were_busy)) {
+ disable_listensocks();
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "Too many open connections (%u), "
+ "not accepting new conns in this process",
+ apr_atomic_read32(&connection_count));
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "Idle workers: %u",
+ ap_queue_info_num_idlers(worker_queue_info));
+ }
+ else if (!listener_may_exit) {
+ void *csd = NULL;
+ ap_listen_rec *lr = (ap_listen_rec *) pt->baton;
+ apr_pool_t *ptrans; /* Pool for per-transaction stuff */
+ ap_queue_info_pop_pool(worker_queue_info, &ptrans);
+
+ if (ptrans == NULL) {
+ /* create a new transaction pool for each accepted socket */
+ apr_allocator_t *allocator = NULL;
+
+ rc = apr_allocator_create(&allocator);
+ if (rc == APR_SUCCESS) {
+ apr_allocator_max_free_set(allocator,
+ ap_max_mem_free);
+ rc = apr_pool_create_ex(&ptrans, pconf, NULL,
+ allocator);
+ if (rc == APR_SUCCESS) {
+ apr_pool_tag(ptrans, "transaction");
+ apr_allocator_owner_set(allocator, ptrans);
+ }
+ }
+ if (rc != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
+ ap_server_conf, APLOGNO(03097)
+ "Failed to create transaction pool");
+ if (allocator) {
+ apr_allocator_destroy(allocator);
+ }
+ resource_shortage = 1;
+ signal_threads(ST_GRACEFUL);
+ continue;
+ }
+ }
+
+ get_worker(&have_idle_worker, 1, &workers_were_busy);
+ rc = lr->accept_func(&csd, lr, ptrans);
+
+ /* later we trash rv and rely on csd to indicate
+ * success/failure
+ */
+ AP_DEBUG_ASSERT(rc == APR_SUCCESS || !csd);
+
+ if (rc == APR_EGENERAL) {
+ /* E[NM]FILE, ENOMEM, etc */
+ resource_shortage = 1;
+ signal_threads(ST_GRACEFUL);
+ }
+
+ if (csd != NULL) {
+ conns_this_child--;
+ if (push2worker(NULL, csd, ptrans) == APR_SUCCESS) {
+ have_idle_worker = 0;
+ }
+ }
+ else {
+ ap_queue_info_push_pool(worker_queue_info, ptrans);
+ }
+ }
+ } /* if:else on pt->type */
+ } /* for processing poll */
+
+ /* We process the timeout queues here only when the global
+ * queues_next_expiry is passed. This happens accurately since
+ * adding to the queues (in workers) can only decrease this expiry,
+ * while latest ones are only taken into account here (in listener)
+ * during queues' processing, with the lock held. This works both
+ * with and without wake-ability.
+ */
+ expiry = queues_next_expiry;
+do_maintenance:
+ if (expiry && expiry < (now = apr_time_now())) {
+ ap_log_error(APLOG_MARK, APLOG_TRACE7, 0, ap_server_conf,
+ "queues maintenance with timeout=%" APR_TIME_T_FMT,
+ expiry > 0 ? expiry - now : -1);
+ apr_thread_mutex_lock(timeout_mutex);
+
+ /* Steps below will recompute this. */
+ queues_next_expiry = 0;
+
+ /* Step 1: keepalive timeouts */
+ if (workers_were_busy || dying) {
+ process_keepalive_queue(0); /* kill'em all \m/ */
+ }
+ else {
+ process_keepalive_queue(now);
+ }
+ /* Step 2: write completion timeouts */
+ process_timeout_queue(write_completion_q, now,
+ defer_lingering_close);
+ /* Step 3: (normal) lingering close completion timeouts */
+ if (dying && linger_q->timeout > short_linger_q->timeout) {
+ /* Dying, force short timeout for normal lingering close */
+ linger_q->timeout = short_linger_q->timeout;
+ }
+ process_timeout_queue(linger_q, now, shutdown_connection);
+ /* Step 4: (short) lingering close completion timeouts */
+ process_timeout_queue(short_linger_q, now, shutdown_connection);
+
+ apr_thread_mutex_unlock(timeout_mutex);
+ ap_log_error(APLOG_MARK, APLOG_TRACE7, 0, ap_server_conf,
+ "queues maintained with timeout=%" APR_TIME_T_FMT,
+ queues_next_expiry > now ? queues_next_expiry - now
+ : -1);
+
+ ps->keep_alive = apr_atomic_read32(keepalive_q->total);
+ ps->write_completion = apr_atomic_read32(write_completion_q->total);
+ ps->connections = apr_atomic_read32(&connection_count);
+ ps->suspended = apr_atomic_read32(&suspended_count);
+ ps->lingering_close = apr_atomic_read32(&lingering_count);
+ }
+ else if ((workers_were_busy || dying)
+ && apr_atomic_read32(keepalive_q->total)) {
+ apr_thread_mutex_lock(timeout_mutex);
+ process_keepalive_queue(0); /* kill'em all \m/ */
+ apr_thread_mutex_unlock(timeout_mutex);
+ ps->keep_alive = 0;
+ }
+
+ /* If there are some lingering closes to defer (to a worker), schedule
+ * them now. We might wakeup a worker spuriously if another one empties
+ * defer_linger_chain in the meantime, but there also may be no active
+ * or all busy workers for an undefined time. In any case a deferred
+ * lingering close can't starve if we do that here since the chain is
+ * filled only above in the listener and it's emptied only in the
+ * worker(s); thus a NULL here means it will stay so while the listener
+ * waits (possibly indefinitely) in poll().
+ */
+ if (defer_linger_chain) {
+ get_worker(&have_idle_worker, 0, &workers_were_busy);
+ if (have_idle_worker
+ && defer_linger_chain /* re-test */
+ && push2worker(NULL, NULL, NULL) == APR_SUCCESS) {
+ have_idle_worker = 0;
+ }
+ }
+
+ if (!workers_were_busy && should_enable_listensocks()) {
+ enable_listensocks();
+ }
+ } /* listener main loop */
+
+ ap_queue_term(worker_queue);
+
+ apr_thread_exit(thd, APR_SUCCESS);
+ return NULL;
+}
+
+/*
+ * During graceful shutdown, if there are more running worker threads than
+ * open connections, exit one worker thread.
+ *
+ * return 1 if thread should exit, 0 if it should continue running.
+ */
+static int worker_thread_should_exit_early(void)
+{
+ for (;;) {
+ apr_uint32_t conns = apr_atomic_read32(&connection_count);
+ apr_uint32_t dead = apr_atomic_read32(&threads_shutdown);
+ apr_uint32_t newdead;
+
+ AP_DEBUG_ASSERT(dead <= threads_per_child);
+ if (conns >= threads_per_child - dead)
+ return 0;
+
+ newdead = dead + 1;
+ if (apr_atomic_cas32(&threads_shutdown, newdead, dead) == dead) {
+ /*
+ * No other thread has exited in the mean time, safe to exit
+ * this one.
+ */
+ return 1;
+ }
+ }
+}
+
+/* XXX For ungraceful termination/restart, we definitely don't want to
+ * wait for active connections to finish but we may want to wait
+ * for idle workers to get out of the queue code and release mutexes,
+ * since those mutexes are cleaned up pretty soon and some systems
+ * may not react favorably (i.e., segfault) if operations are attempted
+ * on cleaned-up mutexes.
+ */
+static void *APR_THREAD_FUNC worker_thread(apr_thread_t * thd, void *dummy)
+{
+ proc_info *ti = dummy;
+ int process_slot = ti->pslot;
+ int thread_slot = ti->tslot;
+ apr_status_t rv;
+ int is_idle = 0;
+
+ free(ti);
+
+ ap_scoreboard_image->servers[process_slot][thread_slot].pid = ap_my_pid;
+ ap_scoreboard_image->servers[process_slot][thread_slot].tid = apr_os_thread_current();
+ ap_scoreboard_image->servers[process_slot][thread_slot].generation = retained->mpm->my_generation;
+ ap_update_child_status_from_indexes(process_slot, thread_slot,
+ SERVER_STARTING, NULL);
+
+ for (;;) {
+ apr_socket_t *csd = NULL;
+ event_conn_state_t *cs;
+ timer_event_t *te = NULL;
+ apr_pool_t *ptrans; /* Pool for per-transaction stuff */
+
+ if (!is_idle) {
+ rv = ap_queue_info_set_idle(worker_queue_info, NULL);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
+ "ap_queue_info_set_idle failed. Attempting to "
+ "shutdown process gracefully.");
+ signal_threads(ST_GRACEFUL);
+ break;
+ }
+ /* A new idler may have changed connections_above_limit(),
+ * let the listener know and decide.
+ */
+ if (listener_is_wakeable && should_enable_listensocks()) {
+ apr_pollset_wakeup(event_pollset);
+ }
+ is_idle = 1;
+ }
+
+ ap_update_child_status_from_indexes(process_slot, thread_slot,
+ dying ? SERVER_GRACEFUL
+ : SERVER_READY, NULL);
+ worker_pop:
+ if (workers_may_exit) {
+ break;
+ }
+ if (dying && worker_thread_should_exit_early()) {
+ break;
+ }
+
+ rv = ap_queue_pop_something(worker_queue, &csd, (void **)&cs,
+ &ptrans, &te);
+
+ if (rv != APR_SUCCESS) {
+ /* We get APR_EOF during a graceful shutdown once all the
+ * connections accepted by this server process have been handled.
+ */
+ if (APR_STATUS_IS_EOF(rv)) {
+ break;
+ }
+ /* We get APR_EINTR whenever ap_queue_pop_*() has been interrupted
+ * from an explicit call to ap_queue_interrupt_all(). This allows
+ * us to unblock threads stuck in ap_queue_pop_*() when a shutdown
+ * is pending.
+ *
+ * If workers_may_exit is set and this is ungraceful termination/
+ * restart, we are bound to get an error on some systems (e.g.,
+ * AIX, which sanity-checks mutex operations) since the queue
+ * may have already been cleaned up. Don't log the "error" if
+ * workers_may_exit is set.
+ */
+ else if (APR_STATUS_IS_EINTR(rv)) {
+ goto worker_pop;
+ }
+ /* We got some other error. */
+ else if (!workers_may_exit) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
+ APLOGNO(03099) "ap_queue_pop_socket failed");
+ }
+ continue;
+ }
+ if (te != NULL) {
+ te->cbfunc(te->baton);
+
+ {
+ apr_thread_mutex_lock(g_timer_skiplist_mtx);
+ APR_RING_INSERT_TAIL(&timer_free_ring.link, te, timer_event_t, link);
+ apr_thread_mutex_unlock(g_timer_skiplist_mtx);
+ }
+ }
+ else {
+ is_idle = 0;
+ if (csd != NULL) {
+ worker_sockets[thread_slot] = csd;
+ process_socket(thd, ptrans, csd, cs, process_slot, thread_slot);
+ worker_sockets[thread_slot] = NULL;
+ }
+ }
+
+ /* If there are deferred lingering closes, handle them now. */
+ while (!workers_may_exit) {
+ cs = defer_linger_chain;
+ if (!cs) {
+ break;
+ }
+ if (apr_atomic_casptr((void *)&defer_linger_chain, cs->chain,
+ cs) != cs) {
+ /* Race lost, try again */
+ continue;
+ }
+ cs->chain = NULL;
+ AP_DEBUG_ASSERT(cs->pub.state == CONN_STATE_LINGER);
+
+ worker_sockets[thread_slot] = csd = cs->pfd.desc.s;
+ process_socket(thd, cs->p, csd, cs, process_slot, thread_slot);
+ worker_sockets[thread_slot] = NULL;
+ }
+ }
+
+ ap_update_child_status_from_indexes(process_slot, thread_slot,
+ dying ? SERVER_DEAD
+ : SERVER_GRACEFUL, NULL);
+
+ apr_thread_exit(thd, APR_SUCCESS);
+ return NULL;
+}
+
+static int check_signal(int signum)
+{
+ switch (signum) {
+ case SIGTERM:
+ case SIGINT:
+ return 1;
+ }
+ return 0;
+}
+
+static void create_listener_thread(thread_starter * ts)
+{
+ int my_child_num = ts->child_num_arg;
+ apr_threadattr_t *thread_attr = ts->threadattr;
+ proc_info *my_info;
+ apr_status_t rv;
+
+ my_info = (proc_info *) ap_malloc(sizeof(proc_info));
+ my_info->pslot = my_child_num;
+ my_info->tslot = -1; /* listener thread doesn't have a thread slot */
+ rv = ap_thread_create(&ts->listener, thread_attr, listener_thread,
+ my_info, pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(00474)
+ "ap_thread_create: unable to create listener thread");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ apr_os_thread_get(&listener_os_thread, ts->listener);
+}
+
+static void setup_threads_runtime(void)
+{
+ apr_status_t rv;
+ ap_listen_rec *lr;
+ apr_pool_t *pskip = NULL;
+ int max_recycled_pools = -1, i;
+ const int good_methods[] = { APR_POLLSET_KQUEUE,
+ APR_POLLSET_PORT,
+ APR_POLLSET_EPOLL };
+ /* XXX: K-A or lingering close connection included in the async factor */
+ const apr_uint32_t async_factor = worker_factor / WORKER_FACTOR_SCALE;
+ const apr_uint32_t pollset_size = (apr_uint32_t)num_listensocks +
+ (apr_uint32_t)threads_per_child *
+ (async_factor > 2 ? async_factor : 2);
+ int pollset_flags;
+
+ /* Event's skiplist operations will happen concurrently with other modules'
+ * runtime so they need their own pool for allocations, and its lifetime
+ * should be at least the one of the connections (ptrans). Thus pskip is
+ * created as a subpool of pconf like/before ptrans (before so that it's
+ * destroyed after). In forked mode pconf is never destroyed so we are good
+ * anyway, but in ONE_PROCESS mode this ensures that the skiplist works
+ * from connection/ptrans cleanups (even after pchild is destroyed).
+ */
+ apr_pool_create(&pskip, pconf);
+ apr_pool_tag(pskip, "mpm_skiplist");
+ apr_thread_mutex_create(&g_timer_skiplist_mtx, APR_THREAD_MUTEX_DEFAULT, pskip);
+ APR_RING_INIT(&timer_free_ring.link, timer_event_t, link);
+ apr_skiplist_init(&timer_skiplist, pskip);
+ apr_skiplist_set_compare(timer_skiplist, timer_comp, timer_comp);
+
+ /* All threads (listener, workers) and synchronization objects (queues,
+ * pollset, mutexes...) created here should have at least the lifetime of
+ * the connections they handle (i.e. ptrans). We can't use this thread's
+ * self pool because all these objects survive it, nor use pchild or pconf
+ * directly because this starter thread races with other modules' runtime,
+ * nor finally pchild (or subpool thereof) because it is killed explicitly
+ * before pconf (thus connections/ptrans can live longer, which matters in
+ * ONE_PROCESS mode). So this leaves us with a subpool of pconf, created
+ * before any ptrans hence destroyed after.
+ */
+ apr_pool_create(&pruntime, pconf);
+ apr_pool_tag(pruntime, "mpm_runtime");
+
+ /* We must create the fd queues before we start up the listener
+ * and worker threads. */
+ rv = ap_queue_create(&worker_queue, threads_per_child, pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(03100)
+ "ap_queue_create() failed");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ if (ap_max_mem_free != APR_ALLOCATOR_MAX_FREE_UNLIMITED) {
+ /* If we want to conserve memory, let's not keep an unlimited number of
+ * pools & allocators.
+ * XXX: This should probably be a separate config directive
+ */
+ max_recycled_pools = threads_per_child * 3 / 4 ;
+ }
+ rv = ap_queue_info_create(&worker_queue_info, pruntime,
+ threads_per_child, max_recycled_pools);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(03101)
+ "ap_queue_info_create() failed");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Create the timeout mutex and main pollset before the listener
+ * thread starts.
+ */
+ rv = apr_thread_mutex_create(&timeout_mutex, APR_THREAD_MUTEX_DEFAULT,
+ pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(03102)
+ "creation of the timeout mutex failed.");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Create the main pollset */
+ pollset_flags = APR_POLLSET_THREADSAFE | APR_POLLSET_NOCOPY |
+ APR_POLLSET_NODEFAULT | APR_POLLSET_WAKEABLE;
+ for (i = 0; i < sizeof(good_methods) / sizeof(good_methods[0]); i++) {
+ rv = apr_pollset_create_ex(&event_pollset, pollset_size, pruntime,
+ pollset_flags, good_methods[i]);
+ if (rv == APR_SUCCESS) {
+ listener_is_wakeable = 1;
+ break;
+ }
+ }
+ if (rv != APR_SUCCESS) {
+ pollset_flags &= ~APR_POLLSET_WAKEABLE;
+ for (i = 0; i < sizeof(good_methods) / sizeof(good_methods[0]); i++) {
+ rv = apr_pollset_create_ex(&event_pollset, pollset_size, pruntime,
+ pollset_flags, good_methods[i]);
+ if (rv == APR_SUCCESS) {
+ break;
+ }
+ }
+ }
+ if (rv != APR_SUCCESS) {
+ pollset_flags &= ~APR_POLLSET_NODEFAULT;
+ rv = apr_pollset_create(&event_pollset, pollset_size, pruntime,
+ pollset_flags);
+ }
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(03103)
+ "apr_pollset_create with Thread Safety failed.");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Add listeners to the main pollset */
+ listener_pollfd = apr_pcalloc(pruntime, num_listensocks *
+ sizeof(apr_pollfd_t));
+ for (i = 0, lr = my_bucket->listeners; lr; lr = lr->next, i++) {
+ apr_pollfd_t *pfd;
+ listener_poll_type *pt;
+
+ AP_DEBUG_ASSERT(i < num_listensocks);
+ pfd = &listener_pollfd[i];
+
+ pfd->reqevents = APR_POLLIN | APR_POLLHUP | APR_POLLERR;
+ pfd->desc_type = APR_POLL_SOCKET;
+ pfd->desc.s = lr->sd;
+
+ pt = apr_pcalloc(pruntime, sizeof(*pt));
+ pfd->client_data = pt;
+ pt->type = PT_ACCEPT;
+ pt->baton = lr;
+
+ apr_socket_opt_set(pfd->desc.s, APR_SO_NONBLOCK, 1);
+ apr_pollset_add(event_pollset, pfd);
+
+ lr->accept_func = ap_unixd_accept;
+ }
+
+ worker_sockets = apr_pcalloc(pruntime, threads_per_child *
+ sizeof(apr_socket_t *));
+}
+
+/* XXX under some circumstances not understood, children can get stuck
+ * in start_threads forever trying to take over slots which will
+ * never be cleaned up; for now there is an APLOG_DEBUG message issued
+ * every so often when this condition occurs
+ */
+static void *APR_THREAD_FUNC start_threads(apr_thread_t * thd, void *dummy)
+{
+ thread_starter *ts = dummy;
+ apr_thread_t **threads = ts->threads;
+ apr_threadattr_t *thread_attr = ts->threadattr;
+ int my_child_num = ts->child_num_arg;
+ proc_info *my_info;
+ apr_status_t rv;
+ int threads_created = 0;
+ int listener_started = 0;
+ int prev_threads_created;
+ int loops, i;
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02471)
+ "start_threads: Using %s (%swakeable)",
+ apr_pollset_method_name(event_pollset),
+ listener_is_wakeable ? "" : "not ");
+
+ loops = prev_threads_created = 0;
+ while (1) {
+ /* threads_per_child does not include the listener thread */
+ for (i = 0; i < threads_per_child; i++) {
+ int status =
+ ap_scoreboard_image->servers[my_child_num][i].status;
+
+ if (status != SERVER_DEAD) {
+ continue;
+ }
+
+ my_info = (proc_info *) ap_malloc(sizeof(proc_info));
+ my_info->pslot = my_child_num;
+ my_info->tslot = i;
+
+ /* We are creating threads right now */
+ ap_update_child_status_from_indexes(my_child_num, i,
+ SERVER_STARTING, NULL);
+ /* We let each thread update its own scoreboard entry. This is
+ * done because it lets us deal with tid better.
+ */
+ rv = ap_thread_create(&threads[i], thread_attr,
+ worker_thread, my_info, pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
+ APLOGNO(03104)
+ "ap_thread_create: unable to create worker thread");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ threads_created++;
+ }
+
+ /* Start the listener only when there are workers available */
+ if (!listener_started && threads_created) {
+ create_listener_thread(ts);
+ listener_started = 1;
+ }
+
+
+ if (start_thread_may_exit || threads_created == threads_per_child) {
+ break;
+ }
+ /* wait for previous generation to clean up an entry */
+ apr_sleep(apr_time_from_sec(1));
+ ++loops;
+ if (loops % 120 == 0) { /* every couple of minutes */
+ if (prev_threads_created == threads_created) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "child %" APR_PID_T_FMT " isn't taking over "
+ "slots very quickly (%d of %d)",
+ ap_my_pid, threads_created,
+ threads_per_child);
+ }
+ prev_threads_created = threads_created;
+ }
+ }
+
+ /* What state should this child_main process be listed as in the
+ * scoreboard...?
+ * ap_update_child_status_from_indexes(my_child_num, i, SERVER_STARTING,
+ * (request_rec *) NULL);
+ *
+ * This state should be listed separately in the scoreboard, in some kind
+ * of process_status, not mixed in with the worker threads' status.
+ * "life_status" is almost right, but it's in the worker's structure, and
+ * the name could be clearer. gla
+ */
+ apr_thread_exit(thd, APR_SUCCESS);
+ return NULL;
+}
+
+static void join_workers(apr_thread_t * listener, apr_thread_t ** threads)
+{
+ int i;
+ apr_status_t rv, thread_rv;
+
+ if (listener) {
+ int iter;
+
+ /* deal with a rare timing window which affects waking up the
+ * listener thread... if the signal sent to the listener thread
+ * is delivered between the time it verifies that the
+ * listener_may_exit flag is clear and the time it enters a
+ * blocking syscall, the signal didn't do any good... work around
+ * that by sleeping briefly and sending it again
+ */
+
+ iter = 0;
+ while (!dying) {
+ apr_sleep(apr_time_from_msec(500));
+ if (dying || ++iter > 10) {
+ break;
+ }
+ /* listener has not stopped accepting yet */
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "listener has not stopped accepting yet (%d iter)", iter);
+ wakeup_listener();
+ }
+ if (iter > 10) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00475)
+ "the listener thread didn't stop accepting");
+ }
+ else {
+ rv = apr_thread_join(&thread_rv, listener);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00476)
+ "apr_thread_join: unable to join listener thread");
+ }
+ }
+ }
+
+ for (i = 0; i < threads_per_child; i++) {
+ if (threads[i]) { /* if we ever created this thread */
+ rv = apr_thread_join(&thread_rv, threads[i]);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00477)
+ "apr_thread_join: unable to join worker "
+ "thread %d", i);
+ }
+ }
+ }
+}
+
+static void join_start_thread(apr_thread_t * start_thread_id)
+{
+ apr_status_t rv, thread_rv;
+
+ start_thread_may_exit = 1; /* tell it to give up in case it is still
+ * trying to take over slots from a
+ * previous generation
+ */
+ rv = apr_thread_join(&thread_rv, start_thread_id);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00478)
+ "apr_thread_join: unable to join the start " "thread");
+ }
+}
+
+static void child_main(int child_num_arg, int child_bucket)
+{
+ apr_thread_t **threads;
+ apr_status_t rv;
+ thread_starter *ts;
+ apr_threadattr_t *thread_attr;
+ apr_thread_t *start_thread_id;
+ int i;
+
+ /* for benefit of any hooks that run as this child initializes */
+ retained->mpm->mpm_state = AP_MPMQ_STARTING;
+
+ ap_my_pid = getpid();
+ ap_child_slot = child_num_arg;
+ ap_fatal_signal_child_setup(ap_server_conf);
+
+ /* Get a sub context for global allocations in this child, so that
+ * we can have cleanups occur when the child exits.
+ */
+ apr_pool_create(&pchild, pconf);
+ apr_pool_tag(pchild, "pchild");
+
+#if AP_HAS_THREAD_LOCAL
+ if (!one_process) {
+ apr_thread_t *thd = NULL;
+ if ((rv = ap_thread_main_create(&thd, pchild))) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(10377)
+ "Couldn't initialize child main thread");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ }
+#endif
+
+ /* close unused listeners and pods */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ if (i != child_bucket) {
+ ap_close_listeners_ex(all_buckets[i].listeners);
+ ap_mpm_podx_close(all_buckets[i].pod);
+ }
+ }
+
+ /*stuff to do before we switch id's, so we have permissions. */
+ ap_reopen_scoreboard(pchild, NULL, 0);
+
+ /* done with init critical section */
+ if (ap_run_drop_privileges(pchild, ap_server_conf)) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Just use the standard apr_setup_signal_thread to block all signals
+ * from being received. The child processes no longer use signals for
+ * any communication with the parent process. Let's also do this before
+ * child_init() hooks are called and possibly create threads that
+ * otherwise could "steal" (implicitly) MPM's signals.
+ */
+ rv = apr_setup_signal_thread();
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(00479)
+ "Couldn't initialize signal thread");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ ap_run_child_init(pchild, ap_server_conf);
+
+ if (ap_max_requests_per_child) {
+ conns_this_child = ap_max_requests_per_child;
+ }
+ else {
+ /* coding a value of zero means infinity */
+ conns_this_child = APR_INT32_MAX;
+ }
+
+ /* Setup threads */
+
+ /* Globals used by signal_threads() so to be initialized before */
+ setup_threads_runtime();
+
+ /* clear the storage; we may not create all our threads immediately,
+ * and we want a 0 entry to indicate a thread which was not created
+ */
+ threads = ap_calloc(threads_per_child, sizeof(apr_thread_t *));
+ ts = apr_palloc(pchild, sizeof(*ts));
+
+ apr_threadattr_create(&thread_attr, pchild);
+ /* 0 means PTHREAD_CREATE_JOINABLE */
+ apr_threadattr_detach_set(thread_attr, 0);
+
+ if (ap_thread_stacksize != 0) {
+ rv = apr_threadattr_stacksize_set(thread_attr, ap_thread_stacksize);
+ if (rv != APR_SUCCESS && rv != APR_ENOTIMPL) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, APLOGNO(02436)
+ "WARNING: ThreadStackSize of %" APR_SIZE_T_FMT " is "
+ "inappropriate, using default",
+ ap_thread_stacksize);
+ }
+ }
+
+ ts->threads = threads;
+ ts->listener = NULL;
+ ts->child_num_arg = child_num_arg;
+ ts->threadattr = thread_attr;
+
+ rv = ap_thread_create(&start_thread_id, thread_attr, start_threads,
+ ts, pchild);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(00480)
+ "ap_thread_create: unable to create worker thread");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+
+ retained->mpm->mpm_state = AP_MPMQ_RUNNING;
+
+ /* If we are only running in one_process mode, we will want to
+ * still handle signals. */
+ if (one_process) {
+ /* Block until we get a terminating signal. */
+ apr_signal_thread(check_signal);
+ /* make sure the start thread has finished; signal_threads()
+ * and join_workers() depend on that
+ */
+ /* XXX join_start_thread() won't be awakened if one of our
+ * threads encounters a critical error and attempts to
+ * shutdown this child
+ */
+ join_start_thread(start_thread_id);
+
+ /* helps us terminate a little more quickly than the dispatch of the
+ * signal thread; beats the Pipe of Death and the browsers
+ */
+ signal_threads(ST_UNGRACEFUL);
+
+ /* A terminating signal was received. Now join each of the
+ * workers to clean them up.
+ * If the worker already exited, then the join frees
+ * their resources and returns.
+ * If the worker hasn't exited, then this blocks until
+ * they have (then cleans up).
+ */
+ join_workers(ts->listener, threads);
+ }
+ else { /* !one_process */
+ /* remove SIGTERM from the set of blocked signals... if one of
+ * the other threads in the process needs to take us down
+ * (e.g., for MaxConnectionsPerChild) it will send us SIGTERM
+ */
+ apr_signal(SIGTERM, dummy_signal_handler);
+ unblock_signal(SIGTERM);
+ /* Watch for any messages from the parent over the POD */
+ while (1) {
+ rv = ap_mpm_podx_check(my_bucket->pod);
+ if (rv == AP_MPM_PODX_NORESTART) {
+ /* see if termination was triggered while we slept */
+ switch (terminate_mode) {
+ case ST_GRACEFUL:
+ rv = AP_MPM_PODX_GRACEFUL;
+ break;
+ case ST_UNGRACEFUL:
+ rv = AP_MPM_PODX_RESTART;
+ break;
+ }
+ }
+ if (rv == AP_MPM_PODX_GRACEFUL || rv == AP_MPM_PODX_RESTART) {
+ /* make sure the start thread has finished;
+ * signal_threads() and join_workers depend on that
+ */
+ join_start_thread(start_thread_id);
+ signal_threads(rv ==
+ AP_MPM_PODX_GRACEFUL ? ST_GRACEFUL : ST_UNGRACEFUL);
+ break;
+ }
+ }
+
+ /* A terminating signal was received. Now join each of the
+ * workers to clean them up.
+ * If the worker already exited, then the join frees
+ * their resources and returns.
+ * If the worker hasn't exited, then this blocks until
+ * they have (then cleans up).
+ */
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "%s termination received, joining workers",
+ rv == AP_MPM_PODX_GRACEFUL ? "graceful" : "ungraceful");
+ join_workers(ts->listener, threads);
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "%s termination, workers joined, exiting",
+ rv == AP_MPM_PODX_GRACEFUL ? "graceful" : "ungraceful");
+ }
+
+ free(threads);
+
+ clean_child_exit(resource_shortage ? APEXIT_CHILDSICK : 0);
+}
+
+static int make_child(server_rec * s, int slot, int bucket)
+{
+ int pid;
+
+ if (slot + 1 > retained->max_daemon_used) {
+ retained->max_daemon_used = slot + 1;
+ }
+
+ if (ap_scoreboard_image->parent[slot].pid != 0) {
+ /* XXX replace with assert or remove ? */
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(03455)
+ "BUG: Scoreboard slot %d should be empty but is "
+ "in use by pid %" APR_PID_T_FMT,
+ slot, ap_scoreboard_image->parent[slot].pid);
+ return -1;
+ }
+
+ if (one_process) {
+ my_bucket = &all_buckets[0];
+
+ event_note_child_started(slot, getpid());
+ child_main(slot, 0);
+ /* NOTREACHED */
+ ap_assert(0);
+ return -1;
+ }
+
+ if ((pid = fork()) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, APLOGNO(00481)
+ "fork: Unable to fork new process");
+
+ /* fork didn't succeed. There's no need to touch the scoreboard;
+ * if we were trying to replace a failed child process, then
+ * server_main_loop() marked its workers SERVER_DEAD, and if
+ * we were trying to replace a child process that exited normally,
+ * its worker_thread()s left SERVER_DEAD or SERVER_GRACEFUL behind.
+ */
+
+ /* In case system resources are maxxed out, we don't want
+ Apache running away with the CPU trying to fork over and
+ over and over again. */
+ apr_sleep(apr_time_from_sec(10));
+
+ return -1;
+ }
+
+ if (!pid) {
+#if AP_HAS_THREAD_LOCAL
+ ap_thread_current_after_fork();
+#endif
+
+ my_bucket = &all_buckets[bucket];
+
+#ifdef HAVE_BINDPROCESSOR
+ /* By default, AIX binds to a single processor. This bit unbinds
+ * children which will then bind to another CPU.
+ */
+ int status = bindprocessor(BINDPROCESS, (int) getpid(),
+ PROCESSOR_CLASS_ANY);
+ if (status != OK)
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, errno,
+ ap_server_conf, APLOGNO(00482)
+ "processor unbind failed");
+#endif
+ RAISE_SIGSTOP(MAKE_CHILD);
+
+ apr_signal(SIGTERM, just_die);
+ child_main(slot, bucket);
+ /* NOTREACHED */
+ ap_assert(0);
+ return -1;
+ }
+
+ event_note_child_started(slot, pid);
+ return 0;
+}
+
+/* start up a bunch of children */
+static void startup_children(int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < server_limit; ++i) {
+ if (ap_scoreboard_image->parent[i].pid != 0) {
+ continue;
+ }
+ if (make_child(ap_server_conf, i, i % retained->mpm->num_buckets) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+static void perform_idle_server_maintenance(int child_bucket,
+ int *max_daemon_used)
+{
+ int num_buckets = retained->mpm->num_buckets;
+ int idle_thread_count = 0;
+ process_score *ps;
+ int free_length = 0;
+ int free_slots[MAX_SPAWN_RATE];
+ int last_non_dead = -1;
+ int active_thread_count = 0;
+ int i, j;
+
+ for (i = 0; i < server_limit; ++i) {
+ if (num_buckets > 1 && (i % num_buckets) != child_bucket) {
+ /* We only care about child_bucket in this call */
+ continue;
+ }
+ if (i >= retained->max_daemon_used &&
+ free_length == retained->idle_spawn_rate[child_bucket]) {
+ /* short cut if all active processes have been examined and
+ * enough empty scoreboard slots have been found
+ */
+ break;
+ }
+
+ ps = &ap_scoreboard_image->parent[i];
+ if (ps->pid != 0) {
+ int child_threads_active = 0;
+ if (ps->quiescing == 1) {
+ ps->quiescing = 2;
+ retained->active_daemons--;
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "Child %d quiescing: pid %d, gen %d, "
+ "active %d/%d, total %d/%d/%d",
+ i, (int)ps->pid, (int)ps->generation,
+ retained->active_daemons, active_daemons_limit,
+ retained->total_daemons, retained->max_daemon_used,
+ server_limit);
+ }
+ for (j = 0; j < threads_per_child; j++) {
+ int status = ap_scoreboard_image->servers[i][j].status;
+
+ /* We consider a starting server as idle because we started it
+ * at least a cycle ago, and if it still hasn't finished starting
+ * then we're just going to swamp things worse by forking more.
+ * So we hopefully won't need to fork more if we count it.
+ * This depends on the ordering of SERVER_READY and SERVER_STARTING.
+ */
+ if (status <= SERVER_READY && !ps->quiescing && !ps->not_accepting
+ && ps->generation == retained->mpm->my_generation) {
+ ++idle_thread_count;
+ }
+ if (status >= SERVER_READY && status < SERVER_GRACEFUL) {
+ ++child_threads_active;
+ }
+ }
+ active_thread_count += child_threads_active;
+ if (child_threads_active == threads_per_child) {
+ had_healthy_child = 1;
+ }
+ last_non_dead = i;
+ }
+ else if (free_length < retained->idle_spawn_rate[child_bucket]) {
+ free_slots[free_length++] = i;
+ }
+ }
+ if (*max_daemon_used < last_non_dead + 1) {
+ *max_daemon_used = last_non_dead + 1;
+ }
+
+ if (retained->sick_child_detected) {
+ if (had_healthy_child) {
+ /* Assume this is a transient error, even though it may not be. Leave
+ * the server up in case it is able to serve some requests or the
+ * problem will be resolved.
+ */
+ retained->sick_child_detected = 0;
+ }
+ else if (child_bucket < num_buckets - 1) {
+ /* check for had_healthy_child up to the last child bucket */
+ return;
+ }
+ else {
+ /* looks like a basket case, as no child ever fully initialized; give up.
+ */
+ retained->mpm->shutdown_pending = 1;
+ child_fatal = 1;
+ ap_log_error(APLOG_MARK, APLOG_ALERT, 0,
+ ap_server_conf, APLOGNO(02324)
+ "A resource shortage or other unrecoverable failure "
+ "was encountered before any child process initialized "
+ "successfully... httpd is exiting!");
+ /* the child already logged the failure details */
+ return;
+ }
+ }
+
+ AP_DEBUG_ASSERT(retained->active_daemons <= retained->total_daemons
+ && retained->total_daemons <= retained->max_daemon_used
+ && retained->max_daemon_used <= server_limit);
+
+ if (idle_thread_count > max_spare_threads / num_buckets) {
+ /*
+ * Child processes that we ask to shut down won't die immediately
+ * but may stay around for a long time when they finish their
+ * requests. If the server load changes many times, many such
+ * gracefully finishing processes may accumulate, filling up the
+ * scoreboard. To avoid running out of scoreboard entries, we
+ * don't shut down more processes if there are stopping ones
+ * already (i.e. active_daemons != total_daemons) and not enough
+ * slack space in the scoreboard for a graceful restart.
+ *
+ * XXX It would be nice if we could
+ * XXX - kill processes without keepalive connections first
+ * XXX - tell children to stop accepting new connections, and
+ * XXX depending on server load, later be able to resurrect them
+ * or kill them
+ */
+ int do_kill = (retained->active_daemons == retained->total_daemons
+ || (server_limit - retained->total_daemons >
+ active_daemons_limit));
+ ap_log_error(APLOG_MARK, APLOG_TRACE5, 0, ap_server_conf,
+ "%shutting down one child: "
+ "active %d/%d, total %d/%d/%d, "
+ "idle threads %d, max workers %d",
+ (do_kill) ? "S" : "Not s",
+ retained->active_daemons, active_daemons_limit,
+ retained->total_daemons, retained->max_daemon_used,
+ server_limit, idle_thread_count, max_workers);
+ if (do_kill) {
+ ap_mpm_podx_signal(all_buckets[child_bucket].pod,
+ AP_MPM_PODX_GRACEFUL);
+ }
+ else {
+ /* Wait for dying daemon(s) to exit */
+ }
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+ else if (idle_thread_count < min_spare_threads / num_buckets) {
+ if (active_thread_count >= max_workers / num_buckets) {
+ if (0 == idle_thread_count) {
+ if (!retained->maxclients_reported) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00484)
+ "server reached MaxRequestWorkers setting, "
+ "consider raising the MaxRequestWorkers "
+ "setting");
+ retained->maxclients_reported = 1;
+ }
+ }
+ else {
+ if (!retained->near_maxclients_reported) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(10159)
+ "server is within MinSpareThreads of "
+ "MaxRequestWorkers, consider raising the "
+ "MaxRequestWorkers setting");
+ retained->near_maxclients_reported = 1;
+ }
+ }
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+ else if (free_length == 0) { /* scoreboard is full, can't fork */
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(03490)
+ "scoreboard is full, not at MaxRequestWorkers."
+ "Increase ServerLimit.");
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+ else {
+ if (free_length > retained->idle_spawn_rate[child_bucket]) {
+ free_length = retained->idle_spawn_rate[child_bucket];
+ }
+ if (free_length + retained->active_daemons > active_daemons_limit) {
+ if (retained->active_daemons < active_daemons_limit) {
+ free_length = active_daemons_limit - retained->active_daemons;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
+ "server is at active daemons limit, spawning "
+ "of %d children cancelled: active %d/%d, "
+ "total %d/%d/%d, rate %d", free_length,
+ retained->active_daemons, active_daemons_limit,
+ retained->total_daemons, retained->max_daemon_used,
+ server_limit, retained->idle_spawn_rate[child_bucket]);
+ /* reset the spawning rate and prevent its growth below */
+ retained->idle_spawn_rate[child_bucket] = 1;
+ ++retained->hold_off_on_exponential_spawning;
+ free_length = 0;
+ }
+ }
+ if (retained->idle_spawn_rate[child_bucket] >= 8) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00486)
+ "server seems busy, (you may need "
+ "to increase StartServers, ThreadsPerChild "
+ "or Min/MaxSpareThreads), "
+ "spawning %d children, there are around %d idle "
+ "threads, %d active children, and %d children "
+ "that are shutting down", free_length,
+ idle_thread_count, retained->active_daemons,
+ retained->total_daemons);
+ }
+ for (i = 0; i < free_length; ++i) {
+ int slot = free_slots[i];
+ if (make_child(ap_server_conf, slot, child_bucket) < 0) {
+ continue;
+ }
+ if (*max_daemon_used < slot + 1) {
+ *max_daemon_used = slot + 1;
+ }
+ }
+ /* the next time around we want to spawn twice as many if this
+ * wasn't good enough, but not if we've just done a graceful
+ */
+ if (retained->hold_off_on_exponential_spawning) {
+ --retained->hold_off_on_exponential_spawning;
+ }
+ else if (retained->idle_spawn_rate[child_bucket]
+ < MAX_SPAWN_RATE / num_buckets) {
+ retained->idle_spawn_rate[child_bucket] *= 2;
+ }
+ }
+ }
+ else {
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+}
+
+static void server_main_loop(int remaining_children_to_start)
+{
+ int num_buckets = retained->mpm->num_buckets;
+ int max_daemon_used = 0;
+ int successive_kills = 0;
+ int child_slot;
+ apr_exit_why_e exitwhy;
+ int status, processed_status;
+ apr_proc_t pid;
+ int i;
+
+ while (!retained->mpm->restart_pending && !retained->mpm->shutdown_pending) {
+ ap_wait_or_timeout(&exitwhy, &status, &pid, pconf, ap_server_conf);
+
+ if (pid.pid != -1) {
+ processed_status = ap_process_child_status(&pid, exitwhy, status);
+ child_slot = ap_find_child_by_pid(&pid);
+ if (processed_status == APEXIT_CHILDFATAL) {
+ /* fix race condition found in PR 39311
+ * A child created at the same time as a graceful happens
+ * can find the lock missing and create a fatal error.
+ * It is not fatal for the last generation to be in this state.
+ */
+ if (child_slot < 0
+ || ap_get_scoreboard_process(child_slot)->generation
+ == retained->mpm->my_generation) {
+ retained->mpm->shutdown_pending = 1;
+ child_fatal = 1;
+ /*
+ * total_daemons counting will be off now, but as we
+ * are shutting down, that is not an issue anymore.
+ */
+ return;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(00487)
+ "Ignoring fatal error in child of previous "
+ "generation (pid %ld).",
+ (long)pid.pid);
+ retained->sick_child_detected = 1;
+ }
+ }
+ else if (processed_status == APEXIT_CHILDSICK) {
+ /* tell perform_idle_server_maintenance to check into this
+ * on the next timer pop
+ */
+ retained->sick_child_detected = 1;
+ }
+ /* non-fatal death... note that it's gone in the scoreboard. */
+ if (child_slot >= 0) {
+ event_note_child_stopped(child_slot, 0, 0);
+
+ if (processed_status == APEXIT_CHILDSICK) {
+ /* resource shortage, minimize the fork rate */
+ retained->idle_spawn_rate[child_slot % num_buckets] = 1;
+ }
+ else if (remaining_children_to_start) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ make_child(ap_server_conf, child_slot,
+ child_slot % num_buckets);
+ --remaining_children_to_start;
+ }
+ }
+#if APR_HAS_OTHER_CHILD
+ else if (apr_proc_other_child_alert(&pid, APR_OC_REASON_DEATH,
+ status) == 0) {
+ /* handled */
+ }
+#endif
+ else if (retained->mpm->was_graceful) {
+ /* Great, we've probably just lost a slot in the
+ * scoreboard. Somehow we don't know about this child.
+ */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
+ ap_server_conf, APLOGNO(00488)
+ "long lost child came home! (pid %ld)",
+ (long) pid.pid);
+ }
+ /* Don't perform idle maintenance when a child dies,
+ * only do it when there's a timeout. Remember only a
+ * finite number of children can die, and it's pretty
+ * pathological for a lot to die suddenly. If a child is
+ * killed by a signal (faulting) we want to restart it ASAP
+ * though, up to 3 successive faults or we stop this until
+ * a timeout happens again (to avoid the flood of fork()ed
+ * processes that keep being killed early).
+ */
+ if (child_slot < 0 || !APR_PROC_CHECK_SIGNALED(exitwhy)) {
+ continue;
+ }
+ if (++successive_kills >= 3) {
+ if (successive_kills % 10 == 3) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
+ ap_server_conf, APLOGNO(10392)
+ "children are killed successively!");
+ }
+ continue;
+ }
+ ++remaining_children_to_start;
+ }
+ else {
+ successive_kills = 0;
+ }
+
+ if (remaining_children_to_start) {
+ /* we hit a 1 second timeout in which none of the previous
+ * generation of children needed to be reaped... so assume
+ * they're all done, and pick up the slack if any is left.
+ */
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ /* In any event we really shouldn't do the code below because
+ * few of the servers we just started are in the IDLE state
+ * yet, so we'd mistakenly create an extra server.
+ */
+ continue;
+ }
+
+ max_daemon_used = 0;
+ for (i = 0; i < num_buckets; i++) {
+ perform_idle_server_maintenance(i, &max_daemon_used);
+ }
+ retained->max_daemon_used = max_daemon_used;
+ }
+}
+
+static int event_run(apr_pool_t * _pconf, apr_pool_t * plog, server_rec * s)
+{
+ int num_buckets = retained->mpm->num_buckets;
+ int remaining_children_to_start;
+ int i;
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ if (!retained->mpm->was_graceful) {
+ if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ return !OK;
+ }
+ /* fix the generation number in the global score; we just got a new,
+ * cleared scoreboard
+ */
+ ap_scoreboard_image->global->running_generation = retained->mpm->my_generation;
+ }
+
+ ap_unixd_mpm_set_signals(pconf, one_process);
+
+ /* Don't thrash since num_buckets depends on the
+ * system and the number of online CPU cores...
+ */
+ if (active_daemons_limit < num_buckets)
+ active_daemons_limit = num_buckets;
+ if (ap_daemons_to_start < num_buckets)
+ ap_daemons_to_start = num_buckets;
+ /* We want to create as much children at a time as the number of buckets,
+ * so to optimally accept connections (evenly distributed across buckets).
+ * Thus min_spare_threads should at least maintain num_buckets children,
+ * and max_spare_threads allow num_buckets more children w/o triggering
+ * immediately (e.g. num_buckets idle threads margin, one per bucket).
+ */
+ if (min_spare_threads < threads_per_child * (num_buckets - 1) + num_buckets)
+ min_spare_threads = threads_per_child * (num_buckets - 1) + num_buckets;
+ if (max_spare_threads < min_spare_threads + (threads_per_child + 1) * num_buckets)
+ max_spare_threads = min_spare_threads + (threads_per_child + 1) * num_buckets;
+
+ /* If we're doing a graceful_restart then we're going to see a lot
+ * of children exiting immediately when we get into the main loop
+ * below (because we just sent them AP_SIG_GRACEFUL). This happens pretty
+ * rapidly... and for each one that exits we may start a new one, until
+ * there are at least min_spare_threads idle threads, counting across
+ * all children. But we may be permitted to start more children than
+ * that, so we'll just keep track of how many we're
+ * supposed to start up without the 1 second penalty between each fork.
+ */
+ remaining_children_to_start = ap_daemons_to_start;
+ if (remaining_children_to_start > active_daemons_limit) {
+ remaining_children_to_start = active_daemons_limit;
+ }
+ if (!retained->mpm->was_graceful) {
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ }
+ else {
+ /* give the system some time to recover before kicking into
+ * exponential mode */
+ retained->hold_off_on_exponential_spawning = 10;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00489)
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00490)
+ "Server built: %s", ap_get_server_built());
+ ap_log_command_line(plog, s);
+ ap_log_mpm_common(s);
+
+ retained->mpm->mpm_state = AP_MPMQ_RUNNING;
+
+ server_main_loop(remaining_children_to_start);
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+
+ if (retained->mpm->shutdown_pending && retained->mpm->is_ungraceful) {
+ /* Time to shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, active_daemons_limit,
+ AP_MPM_PODX_RESTART);
+ }
+ ap_reclaim_child_processes(1, /* Start with SIGTERM */
+ event_note_child_stopped);
+
+ if (!child_fatal) {
+ /* cleanup pid file on normal shutdown */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0,
+ ap_server_conf, APLOGNO(00491) "caught SIGTERM, shutting down");
+ }
+
+ return DONE;
+ }
+
+ if (retained->mpm->shutdown_pending) {
+ /* Time to gracefully shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ int active_children;
+ int index;
+ apr_time_t cutoff = 0;
+
+ /* Close our listeners, and then ask our children to do same */
+ ap_close_listeners();
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, active_daemons_limit,
+ AP_MPM_PODX_GRACEFUL);
+ }
+ ap_relieve_child_processes(event_note_child_stopped);
+
+ if (!child_fatal) {
+ /* cleanup pid file on normal shutdown */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00492)
+ "caught " AP_SIG_GRACEFUL_STOP_STRING
+ ", shutting down gracefully");
+ }
+
+ if (ap_graceful_shutdown_timeout) {
+ cutoff = apr_time_now() +
+ apr_time_from_sec(ap_graceful_shutdown_timeout);
+ }
+
+ /* Don't really exit until each child has finished */
+ retained->mpm->shutdown_pending = 0;
+ do {
+ /* Pause for a second */
+ apr_sleep(apr_time_from_sec(1));
+
+ /* Relieve any children which have now exited */
+ ap_relieve_child_processes(event_note_child_stopped);
+
+ active_children = 0;
+ for (index = 0; index < retained->max_daemon_used; ++index) {
+ if (ap_mpm_safe_kill(MPM_CHILD_PID(index), 0) == APR_SUCCESS) {
+ active_children = 1;
+ /* Having just one child is enough to stay around */
+ break;
+ }
+ }
+ } while (!retained->mpm->shutdown_pending && active_children &&
+ (!ap_graceful_shutdown_timeout || apr_time_now() < cutoff));
+
+ /* We might be here because we received SIGTERM, either
+ * way, try and make sure that all of our processes are
+ * really dead.
+ */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, active_daemons_limit,
+ AP_MPM_PODX_RESTART);
+ }
+ ap_reclaim_child_processes(1, event_note_child_stopped);
+
+ return DONE;
+ }
+
+ /* we've been told to restart */
+ if (one_process) {
+ /* not worth thinking about */
+ return DONE;
+ }
+
+ /* advance to the next generation */
+ /* XXX: we really need to make sure this new generation number isn't in
+ * use by any of the children.
+ */
+ ++retained->mpm->my_generation;
+ ap_scoreboard_image->global->running_generation = retained->mpm->my_generation;
+
+ if (!retained->mpm->is_ungraceful) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00493)
+ AP_SIG_GRACEFUL_STRING " received. Doing graceful restart");
+ /* wake up the children...time to die. But we'll have more soon */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, active_daemons_limit,
+ AP_MPM_PODX_GRACEFUL);
+ }
+
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request.
+ */
+
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00494)
+ "SIGHUP received. Attempting to restart");
+ /* Kill 'em all. Since the child acts the same on the parents SIGTERM
+ * and a SIGHUP, we may as well use the same signal, because some user
+ * pthreads are stealing signals from us left and right.
+ */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, active_daemons_limit,
+ AP_MPM_PODX_RESTART);
+ }
+
+ ap_reclaim_child_processes(1, /* Start with SIGTERM */
+ event_note_child_stopped);
+ }
+
+ return OK;
+}
+
+static void setup_slave_conn(conn_rec *c, void *csd)
+{
+ event_conn_state_t *mcs;
+ event_conn_state_t *cs;
+
+ mcs = ap_get_module_config(c->master->conn_config, &mpm_event_module);
+
+ cs = apr_pcalloc(c->pool, sizeof(*cs));
+ cs->c = c;
+ cs->r = NULL;
+ cs->sc = mcs->sc;
+ cs->suspended = 0;
+ cs->p = c->pool;
+ cs->bucket_alloc = c->bucket_alloc;
+ cs->pfd = mcs->pfd;
+ cs->pub = mcs->pub;
+ cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
+ cs->pub.sense = CONN_SENSE_DEFAULT;
+
+ c->cs = &(cs->pub);
+ ap_set_module_config(c->conn_config, &mpm_event_module, cs);
+}
+
+static int event_pre_connection(conn_rec *c, void *csd)
+{
+ if (c->master && (!c->cs || c->cs == c->master->cs)) {
+ setup_slave_conn(c, csd);
+ }
+ return OK;
+}
+
+static int event_protocol_switch(conn_rec *c, request_rec *r, server_rec *s,
+ const char *protocol)
+{
+ if (!r && s) {
+ /* connection based switching of protocol, set the correct server
+ * configuration, so that timeouts, keepalives and such are used
+ * for the server that the connection was switched on.
+ * Normally, we set this on post_read_request, but on a protocol
+ * other than http/1.1, this might never happen.
+ */
+ event_conn_state_t *cs;
+
+ cs = ap_get_module_config(c->conn_config, &mpm_event_module);
+ cs->sc = ap_get_module_config(s->module_config, &mpm_event_module);
+ }
+ return DECLINED;
+}
+
+/* This really should be a post_config hook, but the error log is already
+ * redirected by that point, so we need to do this in the open_logs phase.
+ */
+static int event_open_logs(apr_pool_t * p, apr_pool_t * plog,
+ apr_pool_t * ptemp, server_rec * s)
+{
+ int startup = 0;
+ int level_flags = 0;
+ int num_buckets = 0;
+ ap_listen_rec **listen_buckets;
+ apr_status_t rv;
+ int i;
+
+ pconf = p;
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (retained->mpm->module_loads == 1) {
+ startup = 1;
+ level_flags |= APLOG_STARTUP;
+ }
+
+ if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT | level_flags, 0,
+ (startup ? NULL : s),
+ "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ if (one_process) {
+ num_buckets = 1;
+ }
+ else if (retained->mpm->was_graceful) {
+ /* Preserve the number of buckets on graceful restarts. */
+ num_buckets = retained->mpm->num_buckets;
+ }
+ if ((rv = ap_duplicate_listeners(pconf, ap_server_conf,
+ &listen_buckets, &num_buckets))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not duplicate listeners");
+ return !OK;
+ }
+
+ all_buckets = apr_pcalloc(pconf, num_buckets * sizeof(*all_buckets));
+ for (i = 0; i < num_buckets; i++) {
+ if (!one_process && /* no POD in one_process mode */
+ (rv = ap_mpm_podx_open(pconf, &all_buckets[i].pod))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not open pipe-of-death");
+ return !OK;
+ }
+ all_buckets[i].listeners = listen_buckets[i];
+ }
+
+ if (retained->mpm->max_buckets < num_buckets) {
+ int new_max, *new_ptr;
+ new_max = retained->mpm->max_buckets * 2;
+ if (new_max < num_buckets) {
+ new_max = num_buckets;
+ }
+ new_ptr = (int *)apr_palloc(ap_pglobal, new_max * sizeof(int));
+ if (retained->idle_spawn_rate) /* NULL at startup */
+ memcpy(new_ptr, retained->idle_spawn_rate,
+ retained->mpm->num_buckets * sizeof(int));
+ retained->idle_spawn_rate = new_ptr;
+ retained->mpm->max_buckets = new_max;
+ }
+ if (retained->mpm->num_buckets < num_buckets) {
+ int rate_max = 1;
+ /* If new buckets are added, set their idle spawn rate to
+ * the highest so far, so that they get filled as quickly
+ * as the existing ones.
+ */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ if (rate_max < retained->idle_spawn_rate[i]) {
+ rate_max = retained->idle_spawn_rate[i];
+ }
+ }
+ for (/* up to date i */; i < num_buckets; i++) {
+ retained->idle_spawn_rate[i] = rate_max;
+ }
+ }
+ retained->mpm->num_buckets = num_buckets;
+
+ /* for skiplist */
+ srand((unsigned int)apr_time_now());
+ return OK;
+}
+
+static int event_pre_config(apr_pool_t * pconf, apr_pool_t * plog,
+ apr_pool_t * ptemp)
+{
+ int no_detach, debug, foreground;
+ apr_status_t rv;
+ const char *userdata_key = "mpm_event_module";
+ int test_atomics = 0;
+
+ debug = ap_exists_config_define("DEBUG");
+
+ if (debug) {
+ foreground = one_process = 1;
+ no_detach = 0;
+ }
+ else {
+ one_process = ap_exists_config_define("ONE_PROCESS");
+ no_detach = ap_exists_config_define("NO_DETACH");
+ foreground = ap_exists_config_define("FOREGROUND");
+ }
+
+ retained = ap_retained_data_get(userdata_key);
+ if (!retained) {
+ retained = ap_retained_data_create(userdata_key, sizeof(*retained));
+ retained->mpm = ap_unixd_mpm_get_retained_data();
+ if (retained->mpm->module_loads) {
+ test_atomics = 1;
+ }
+ }
+ retained->mpm->mpm_state = AP_MPMQ_STARTING;
+ if (retained->mpm->baton != retained) {
+ retained->mpm->was_graceful = 0;
+ retained->mpm->baton = retained;
+ }
+ ++retained->mpm->module_loads;
+
+ /* test once for correct operation of fdqueue */
+ if (test_atomics || retained->mpm->module_loads == 2) {
+ static apr_uint32_t foo1, foo2;
+
+ apr_atomic_set32(&foo1, 100);
+ foo2 = apr_atomic_add32(&foo1, -10);
+ if (foo2 != 100 || foo1 != 90) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL, APLOGNO(02405)
+ "atomics not working as expected - add32 of negative number");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+
+ /* sigh, want this only the second time around */
+ if (retained->mpm->module_loads == 2) {
+ rv = apr_pollset_create(&event_pollset, 1, plog,
+ APR_POLLSET_THREADSAFE | APR_POLLSET_NOCOPY);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00495)
+ "Couldn't create a Thread Safe Pollset. "
+ "Is it supported on your platform?"
+ "Also check system or user limits!");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ apr_pollset_destroy(event_pollset);
+
+ if (!one_process && !foreground) {
+ /* before we detach, setup crash handlers to log to errorlog */
+ ap_fatal_signal_setup(ap_server_conf, pconf);
+ rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
+ : APR_PROC_DETACH_DAEMONIZE);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00496)
+ "apr_proc_detach failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+ }
+
+ parent_pid = ap_my_pid = getpid();
+
+ ap_listen_pre_config();
+ ap_daemons_to_start = DEFAULT_START_DAEMON;
+ min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
+ max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
+ server_limit = DEFAULT_SERVER_LIMIT;
+ thread_limit = DEFAULT_THREAD_LIMIT;
+ active_daemons_limit = server_limit;
+ threads_per_child = DEFAULT_THREADS_PER_CHILD;
+ max_workers = active_daemons_limit * threads_per_child;
+ defer_linger_chain = NULL;
+ had_healthy_child = 0;
+ ap_extended_status = 0;
+
+ event_pollset = NULL;
+ worker_queue_info = NULL;
+ listener_os_thread = NULL;
+ listensocks_disabled = 0;
+ listener_is_wakeable = 0;
+
+ return OK;
+}
+
+static int event_post_config(apr_pool_t *pconf, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ struct {
+ struct timeout_queue *tail, *q;
+ apr_hash_t *hash;
+ } wc, ka;
+
+ /* Not needed in pre_config stage */
+ if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_PRE_CONFIG) {
+ return OK;
+ }
+
+ wc.tail = ka.tail = NULL;
+ wc.hash = apr_hash_make(ptemp);
+ ka.hash = apr_hash_make(ptemp);
+
+ linger_q = TO_QUEUE_MAKE(pconf, apr_time_from_sec(MAX_SECS_TO_LINGER),
+ NULL);
+ short_linger_q = TO_QUEUE_MAKE(pconf, apr_time_from_sec(SECONDS_TO_LINGER),
+ NULL);
+
+ for (; s; s = s->next) {
+ event_srv_cfg *sc = apr_pcalloc(pconf, sizeof *sc);
+
+ ap_set_module_config(s->module_config, &mpm_event_module, sc);
+ if (!wc.tail) {
+ /* The main server uses the global queues */
+ wc.q = TO_QUEUE_MAKE(pconf, s->timeout, NULL);
+ apr_hash_set(wc.hash, &s->timeout, sizeof s->timeout, wc.q);
+ wc.tail = write_completion_q = wc.q;
+
+ ka.q = TO_QUEUE_MAKE(pconf, s->keep_alive_timeout, NULL);
+ apr_hash_set(ka.hash, &s->keep_alive_timeout,
+ sizeof s->keep_alive_timeout, ka.q);
+ ka.tail = keepalive_q = ka.q;
+ }
+ else {
+ /* The vhosts use any existing queue with the same timeout,
+ * or their own queue(s) if there isn't */
+ wc.q = apr_hash_get(wc.hash, &s->timeout, sizeof s->timeout);
+ if (!wc.q) {
+ wc.q = TO_QUEUE_MAKE(pconf, s->timeout, wc.tail);
+ apr_hash_set(wc.hash, &s->timeout, sizeof s->timeout, wc.q);
+ wc.tail = wc.tail->next = wc.q;
+ }
+
+ ka.q = apr_hash_get(ka.hash, &s->keep_alive_timeout,
+ sizeof s->keep_alive_timeout);
+ if (!ka.q) {
+ ka.q = TO_QUEUE_MAKE(pconf, s->keep_alive_timeout, ka.tail);
+ apr_hash_set(ka.hash, &s->keep_alive_timeout,
+ sizeof s->keep_alive_timeout, ka.q);
+ ka.tail = ka.tail->next = ka.q;
+ }
+ }
+ sc->wc_q = wc.q;
+ sc->ka_q = ka.q;
+ }
+
+ return OK;
+}
+
+static int event_check_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (retained->mpm->module_loads == 1) {
+ startup = 1;
+ }
+
+ if (server_limit > MAX_SERVER_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00497)
+ "WARNING: ServerLimit of %d exceeds compile-time "
+ "limit of %d servers, decreasing to %d.",
+ server_limit, MAX_SERVER_LIMIT, MAX_SERVER_LIMIT);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00498)
+ "ServerLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ server_limit, MAX_SERVER_LIMIT);
+ }
+ server_limit = MAX_SERVER_LIMIT;
+ }
+ else if (server_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00499)
+ "WARNING: ServerLimit of %d not allowed, "
+ "increasing to 1.", server_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00500)
+ "ServerLimit of %d not allowed, increasing to 1",
+ server_limit);
+ }
+ server_limit = 1;
+ }
+
+ /* you cannot change ServerLimit across a restart; ignore
+ * any such attempts
+ */
+ if (!retained->first_server_limit) {
+ retained->first_server_limit = server_limit;
+ }
+ else if (server_limit != retained->first_server_limit) {
+ /* don't need a startup console version here */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00501)
+ "changing ServerLimit to %d from original value of %d "
+ "not allowed during restart",
+ server_limit, retained->first_server_limit);
+ server_limit = retained->first_server_limit;
+ }
+
+ if (thread_limit > MAX_THREAD_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00502)
+ "WARNING: ThreadLimit of %d exceeds compile-time "
+ "limit of %d threads, decreasing to %d.",
+ thread_limit, MAX_THREAD_LIMIT, MAX_THREAD_LIMIT);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00503)
+ "ThreadLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ thread_limit, MAX_THREAD_LIMIT);
+ }
+ thread_limit = MAX_THREAD_LIMIT;
+ }
+ else if (thread_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00504)
+ "WARNING: ThreadLimit of %d not allowed, "
+ "increasing to 1.", thread_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00505)
+ "ThreadLimit of %d not allowed, increasing to 1",
+ thread_limit);
+ }
+ thread_limit = 1;
+ }
+
+ /* you cannot change ThreadLimit across a restart; ignore
+ * any such attempts
+ */
+ if (!retained->first_thread_limit) {
+ retained->first_thread_limit = thread_limit;
+ }
+ else if (thread_limit != retained->first_thread_limit) {
+ /* don't need a startup console version here */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00506)
+ "changing ThreadLimit to %d from original value of %d "
+ "not allowed during restart",
+ thread_limit, retained->first_thread_limit);
+ thread_limit = retained->first_thread_limit;
+ }
+
+ if (threads_per_child > thread_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00507)
+ "WARNING: ThreadsPerChild of %d exceeds ThreadLimit "
+ "of %d threads, decreasing to %d. "
+ "To increase, please see the ThreadLimit directive.",
+ threads_per_child, thread_limit, thread_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00508)
+ "ThreadsPerChild of %d exceeds ThreadLimit "
+ "of %d, decreasing to match",
+ threads_per_child, thread_limit);
+ }
+ threads_per_child = thread_limit;
+ }
+ else if (threads_per_child < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00509)
+ "WARNING: ThreadsPerChild of %d not allowed, "
+ "increasing to 1.", threads_per_child);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00510)
+ "ThreadsPerChild of %d not allowed, increasing to 1",
+ threads_per_child);
+ }
+ threads_per_child = 1;
+ }
+
+ if (max_workers < threads_per_child) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00511)
+ "WARNING: MaxRequestWorkers of %d is less than "
+ "ThreadsPerChild of %d, increasing to %d. "
+ "MaxRequestWorkers must be at least as large "
+ "as the number of threads in a single server.",
+ max_workers, threads_per_child, threads_per_child);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00512)
+ "MaxRequestWorkers of %d is less than ThreadsPerChild "
+ "of %d, increasing to match",
+ max_workers, threads_per_child);
+ }
+ max_workers = threads_per_child;
+ }
+
+ active_daemons_limit = max_workers / threads_per_child;
+
+ if (max_workers % threads_per_child) {
+ int tmp_max_workers = active_daemons_limit * threads_per_child;
+
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00513)
+ "WARNING: MaxRequestWorkers of %d is not an integer "
+ "multiple of ThreadsPerChild of %d, decreasing to nearest "
+ "multiple %d, for a maximum of %d servers.",
+ max_workers, threads_per_child, tmp_max_workers,
+ active_daemons_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00514)
+ "MaxRequestWorkers of %d is not an integer multiple "
+ "of ThreadsPerChild of %d, decreasing to nearest "
+ "multiple %d", max_workers, threads_per_child,
+ tmp_max_workers);
+ }
+ max_workers = tmp_max_workers;
+ }
+
+ if (active_daemons_limit > server_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00515)
+ "WARNING: MaxRequestWorkers of %d would require %d servers "
+ "and would exceed ServerLimit of %d, decreasing to %d. "
+ "To increase, please see the ServerLimit directive.",
+ max_workers, active_daemons_limit, server_limit,
+ server_limit * threads_per_child);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00516)
+ "MaxRequestWorkers of %d would require %d servers and "
+ "exceed ServerLimit of %d, decreasing to %d",
+ max_workers, active_daemons_limit, server_limit,
+ server_limit * threads_per_child);
+ }
+ active_daemons_limit = server_limit;
+ }
+
+ /* ap_daemons_to_start > active_daemons_limit checked in ap_mpm_run() */
+ if (ap_daemons_to_start < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00517)
+ "WARNING: StartServers of %d not allowed, "
+ "increasing to 1.", ap_daemons_to_start);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00518)
+ "StartServers of %d not allowed, increasing to 1",
+ ap_daemons_to_start);
+ }
+ ap_daemons_to_start = 1;
+ }
+
+ if (min_spare_threads < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00519)
+ "WARNING: MinSpareThreads of %d not allowed, "
+ "increasing to 1 to avoid almost certain server "
+ "failure. Please read the documentation.",
+ min_spare_threads);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00520)
+ "MinSpareThreads of %d not allowed, increasing to 1",
+ min_spare_threads);
+ }
+ min_spare_threads = 1;
+ }
+
+ /* max_spare_threads < min_spare_threads + threads_per_child
+ * checked in ap_mpm_run()
+ */
+
+ return OK;
+}
+
+static void event_hooks(apr_pool_t * p)
+{
+ /* Our open_logs hook function must run before the core's, or stderr
+ * will be redirected to a file, and the messages won't print to the
+ * console.
+ */
+ static const char *const aszSucc[] = { "core.c", NULL };
+ one_process = 0;
+
+ ap_hook_open_logs(event_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
+ /* we need to set the MPM state before other pre-config hooks use MPM query
+ * to retrieve it, so register as REALLY_FIRST
+ */
+ ap_hook_pre_config(event_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+ ap_hook_post_config(event_post_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_check_config(event_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm(event_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(event_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_register_timed_callback(event_register_timed_callback, NULL, NULL,
+ APR_HOOK_MIDDLE);
+ ap_hook_pre_read_request(event_pre_read_request, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_post_read_request(event_post_read_request, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(event_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+
+ ap_hook_pre_connection(event_pre_connection, NULL, NULL, APR_HOOK_REALLY_FIRST);
+ ap_hook_protocol_switch(event_protocol_switch, NULL, NULL, APR_HOOK_REALLY_FIRST);
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_daemons_to_start = atoi(arg);
+ return NULL;
+}
+
+static const char *set_min_spare_threads(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ min_spare_threads = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_spare_threads(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ max_spare_threads = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_workers(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+ if (!strcasecmp(cmd->cmd->name, "MaxClients")) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO(00521)
+ "MaxClients is deprecated, use MaxRequestWorkers "
+ "instead.");
+ }
+ max_workers = atoi(arg);
+ return NULL;
+}
+
+static const char *set_threads_per_child(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ threads_per_child = atoi(arg);
+ return NULL;
+}
+static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ server_limit = atoi(arg);
+ return NULL;
+}
+
+static const char *set_thread_limit(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ thread_limit = atoi(arg);
+ return NULL;
+}
+
+static const char *set_worker_factor(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ double val;
+ char *endptr;
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ val = strtod(arg, &endptr);
+ if (*endptr)
+ return "error parsing value";
+
+ if (val <= 0)
+ return "AsyncRequestWorkerFactor argument must be a positive number";
+
+ worker_factor = val * WORKER_FACTOR_SCALE;
+ if (worker_factor < WORKER_FACTOR_SCALE) {
+ worker_factor = WORKER_FACTOR_SCALE;
+ }
+ return NULL;
+}
+
+
+static const command_rec event_cmds[] = {
+ LISTEN_COMMANDS,
+ AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
+ "Number of child processes launched at server startup"),
+ AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
+ "Maximum number of child processes for this run of Apache"),
+ AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
+ "Minimum number of idle threads, to handle request spikes"),
+ AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
+ "Maximum number of idle threads"),
+ AP_INIT_TAKE1("MaxClients", set_max_workers, NULL, RSRC_CONF,
+ "Deprecated name of MaxRequestWorkers"),
+ AP_INIT_TAKE1("MaxRequestWorkers", set_max_workers, NULL, RSRC_CONF,
+ "Maximum number of threads alive at the same time"),
+ AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
+ "Number of threads each child creates"),
+ AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF,
+ "Maximum number of worker threads per child process for this "
+ "run of Apache - Upper limit for ThreadsPerChild"),
+ AP_INIT_TAKE1("AsyncRequestWorkerFactor", set_worker_factor, NULL, RSRC_CONF,
+ "How many additional connects will be accepted per idle "
+ "worker thread"),
+ AP_GRACEFUL_SHUTDOWN_TIMEOUT_COMMAND,
+ {NULL}
+};
+
+AP_DECLARE_MODULE(mpm_event) = {
+ MPM20_MODULE_STUFF,
+ NULL, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ event_cmds, /* command apr_table_t */
+ event_hooks /* register_hooks */
+};
diff --git a/server/mpm/event/mpm_default.h b/server/mpm/event/mpm_default.h
new file mode 100644
index 0000000..214caa0
--- /dev/null
+++ b/server/mpm/event/mpm_default.h
@@ -0,0 +1,56 @@
+/* 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 event/mpm_default.h
+ * @brief Event MPM defaults
+ *
+ * @defgroup APACHE_MPM_EVENT Event MPM
+ * @ingroup APACHE_INTERNAL
+ * @{
+ */
+
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Number of servers to spawn off by default --- also, if fewer than
+ * this free when the caretaker checks, it will spawn more.
+ */
+#ifndef DEFAULT_START_DAEMON
+#define DEFAULT_START_DAEMON 3
+#endif
+
+/* Maximum number of *free* server processes --- more than this, and
+ * they will die off.
+ */
+
+#ifndef DEFAULT_MAX_FREE_DAEMON
+#define DEFAULT_MAX_FREE_DAEMON 10
+#endif
+
+/* Minimum --- fewer than this, and more will be created */
+
+#ifndef DEFAULT_MIN_FREE_DAEMON
+#define DEFAULT_MIN_FREE_DAEMON 3
+#endif
+
+#ifndef DEFAULT_THREADS_PER_CHILD
+#define DEFAULT_THREADS_PER_CHILD 25
+#endif
+
+#endif /* AP_MPM_DEFAULT_H */
+/** @} */
diff --git a/server/mpm/mpmt_os2/Makefile.in b/server/mpm/mpmt_os2/Makefile.in
new file mode 100644
index 0000000..f34af9c
--- /dev/null
+++ b/server/mpm/mpmt_os2/Makefile.in
@@ -0,0 +1 @@
+include $(top_srcdir)/build/special.mk
diff --git a/server/mpm/mpmt_os2/config.m4 b/server/mpm/mpmt_os2/config.m4
new file mode 100644
index 0000000..9a29903
--- /dev/null
+++ b/server/mpm/mpmt_os2/config.m4
@@ -0,0 +1,10 @@
+AC_MSG_CHECKING(if mpmt_os2 MPM supports this platform)
+case $host in
+ *os2-emx*)
+ AC_MSG_RESULT(yes)
+ APACHE_MPM_SUPPORTED(mpmt_os2, no, yes)
+ ;;
+ *)
+ AC_MSG_RESULT(no)
+ ;;
+esac
diff --git a/server/mpm/mpmt_os2/config5.m4 b/server/mpm/mpmt_os2/config5.m4
new file mode 100644
index 0000000..c74f145
--- /dev/null
+++ b/server/mpm/mpmt_os2/config5.m4
@@ -0,0 +1,3 @@
+APACHE_MPM_MODULE(mpmt_os2, $enable_mpm_mpmt_os2, mpmt_os2.lo mpmt_os2_child.lo,[
+ APR_ADDTO(CFLAGS,-Zmt)
+])
diff --git a/server/mpm/mpmt_os2/mpm_default.h b/server/mpm/mpmt_os2/mpm_default.h
new file mode 100644
index 0000000..36ba944
--- /dev/null
+++ b/server/mpm/mpmt_os2/mpm_default.h
@@ -0,0 +1,57 @@
+/* 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 mpmt_os2/mpm_default.h
+ * @brief os2 MPM defaults
+ *
+ * @defgroup APACHE_MPM_OS2 OS/2 MPM
+ * @ingroup APACHE_INTERNAL
+ * @{
+ */
+
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Number of servers processes to spawn off by default
+ */
+#ifndef DEFAULT_START_DAEMON
+#define DEFAULT_START_DAEMON 2
+#endif
+
+/* Maximum number of *free* server threads --- more than this, and
+ * they will die off.
+ */
+
+#ifndef DEFAULT_MAX_SPARE_THREAD
+#define DEFAULT_MAX_SPARE_THREAD 10
+#endif
+
+/* Minimum --- fewer than this, and more will be created */
+
+#ifndef DEFAULT_MIN_SPARE_THREAD
+#define DEFAULT_MIN_SPARE_THREAD 5
+#endif
+
+/*
+ * Interval, in microseconds, between scoreboard maintenance.
+ */
+#ifndef SCOREBOARD_MAINTENANCE_INTERVAL
+#define SCOREBOARD_MAINTENANCE_INTERVAL 1000000
+#endif
+
+#endif /* AP_MPM_DEFAULT_H */
+/** @} */
diff --git a/server/mpm/mpmt_os2/mpmt_os2.c b/server/mpm/mpmt_os2/mpmt_os2.c
new file mode 100644
index 0000000..b3adb03
--- /dev/null
+++ b/server/mpm/mpmt_os2/mpmt_os2.c
@@ -0,0 +1,614 @@
+/* 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.
+ */
+
+/* Multi-process, multi-threaded MPM for OS/2
+ *
+ * Server consists of
+ * - a main, parent process
+ * - a small, static number of child processes
+ *
+ * The parent process's job is to manage the child processes. This involves
+ * spawning children as required to ensure there are always ap_daemons_to_start
+ * processes accepting connections.
+ *
+ * Each child process consists of a pool of worker threads and a
+ * main thread that accepts connections & passes them to the workers via
+ * a work queue. The worker thread pool is dynamic, managed by a maintenance
+ * thread so that the number of idle threads is kept between
+ * min_spare_threads & max_spare_threads.
+ *
+ */
+
+/*
+ Todo list
+ - Enforce MaxRequestWorkers somehow
+*/
+#define INCL_NOPMAPI
+#define INCL_DOS
+#define INCL_DOSERRORS
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "mpm_default.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "ap_mpm.h"
+#include "ap_listen.h"
+#include "apr_portable.h"
+#include "mpm_common.h"
+#include "scoreboard.h"
+#include "apr_strings.h"
+#include <os2.h>
+#include <process.h>
+
+/* We don't need many processes,
+ * they're only for redundancy in the event of a crash
+ */
+#define HARD_SERVER_LIMIT 10
+
+/* Limit on the total number of threads per process
+ */
+#ifndef HARD_THREAD_LIMIT
+#define HARD_THREAD_LIMIT 256
+#endif
+
+server_rec *ap_server_conf;
+static apr_pool_t *pconf = NULL; /* Pool for config stuff */
+
+/* Config globals */
+static int one_process = 0;
+static int ap_daemons_to_start = 0;
+static int ap_thread_limit = 0;
+int ap_min_spare_threads = 0;
+int ap_max_spare_threads = 0;
+
+/* Keep track of a few interesting statistics */
+int ap_max_daemons_limit = 0;
+
+/* volatile just in case */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile is_graceful = 0;
+ap_generation_t volatile ap_my_generation=0; /* Used by the scoreboard */
+static int is_parent_process=TRUE;
+HMTX ap_mpm_accept_mutex = 0;
+
+/* An array of these is stored in a shared memory area for passing
+ * sockets from the parent to child processes
+ */
+typedef struct {
+ struct sockaddr_in name;
+ apr_os_sock_t listen_fd;
+} listen_socket_t;
+
+typedef struct {
+ HMTX accept_mutex;
+ listen_socket_t listeners[1];
+} parent_info_t;
+
+static int master_main();
+static void spawn_child(int slot);
+void ap_mpm_child_main(apr_pool_t *pconf);
+static void set_signals();
+
+
+static int mpmt_os2_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s )
+{
+ char *listener_shm_name;
+ parent_info_t *parent_info;
+ ULONG rc;
+ pconf = _pconf;
+ ap_server_conf = s;
+ restart_pending = 0;
+
+ DosSetMaxFH(ap_thread_limit * 2);
+ listener_shm_name = apr_psprintf(pconf, "/sharemem/httpd/parent_info.%d", getppid());
+ rc = DosGetNamedSharedMem((PPVOID)&parent_info, listener_shm_name, PAG_READ);
+ is_parent_process = rc != 0;
+ ap_scoreboard_fname = apr_psprintf(pconf, "/sharemem/httpd/scoreboard.%d", is_parent_process ? getpid() : getppid());
+
+ if (rc == 0) {
+ /* Child process */
+ ap_listen_rec *lr;
+ int num_listeners = 0;
+
+ ap_mpm_accept_mutex = parent_info->accept_mutex;
+
+ /* Set up a default listener if necessary */
+ if (ap_listeners == NULL) {
+ ap_listen_rec *lr = apr_pcalloc(s->process->pool, sizeof(ap_listen_rec));
+ ap_listeners = lr;
+ apr_sockaddr_info_get(&lr->bind_addr, "0.0.0.0", APR_UNSPEC,
+ DEFAULT_HTTP_PORT, 0, s->process->pool);
+ apr_socket_create(&lr->sd, lr->bind_addr->family,
+ SOCK_STREAM, 0, s->process->pool);
+ }
+
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ apr_sockaddr_t *sa;
+ apr_os_sock_put(&lr->sd, &parent_info->listeners[num_listeners].listen_fd, pconf);
+ apr_socket_addr_get(&sa, APR_LOCAL, lr->sd);
+ num_listeners++;
+ }
+
+ DosFreeMem(parent_info);
+
+ /* Do the work */
+ ap_mpm_child_main(pconf);
+
+ /* Outta here */
+ return DONE;
+ }
+ else {
+ /* Parent process */
+ int rc;
+ is_parent_process = TRUE;
+
+ if (ap_setup_listeners(ap_server_conf) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, 0, s, APLOGNO(00200)
+ "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ rc = master_main();
+ ++ap_my_generation;
+ ap_scoreboard_image->global->running_generation = ap_my_generation;
+
+ if (rc != OK) {
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00201)
+ "caught %s, shutting down",
+ (rc == DONE) ? "SIGTERM" : "error");
+ return rc;
+ }
+ } /* Parent process */
+
+ return OK; /* Restart */
+}
+
+
+
+/* Main processing of the parent process
+ * returns TRUE if restarting
+ */
+static int master_main()
+{
+ server_rec *s = ap_server_conf;
+ ap_listen_rec *lr;
+ parent_info_t *parent_info;
+ char *listener_shm_name;
+ int listener_num, num_listeners, slot;
+ ULONG rc;
+
+ printf("%s \n", ap_get_server_description());
+ set_signals();
+
+ if (ap_setup_listeners(ap_server_conf) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, 0, s, APLOGNO(00202)
+ "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ /* Allocate a shared memory block for the array of listeners */
+ for (num_listeners = 0, lr = ap_listeners; lr; lr = lr->next) {
+ num_listeners++;
+ }
+
+ listener_shm_name = apr_psprintf(pconf, "/sharemem/httpd/parent_info.%d", getpid());
+ rc = DosAllocSharedMem((PPVOID)&parent_info, listener_shm_name,
+ sizeof(parent_info_t) + num_listeners * sizeof(listen_socket_t),
+ PAG_READ|PAG_WRITE|PAG_COMMIT);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, APR_FROM_OS_ERROR(rc), s, APLOGNO(00203)
+ "failure allocating shared memory, shutting down");
+ return !OK;
+ }
+
+ /* Store the listener sockets in the shared memory area for our children to see */
+ for (listener_num = 0, lr = ap_listeners; lr; lr = lr->next, listener_num++) {
+ apr_os_sock_get(&parent_info->listeners[listener_num].listen_fd, lr->sd);
+ }
+
+ /* Create mutex to prevent multiple child processes from detecting
+ * a connection with apr_poll()
+ */
+
+ rc = DosCreateMutexSem(NULL, &ap_mpm_accept_mutex, DC_SEM_SHARED, FALSE);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, APR_FROM_OS_ERROR(rc), s, APLOGNO(00204)
+ "failure creating accept mutex, shutting down");
+ return !OK;
+ }
+
+ parent_info->accept_mutex = ap_mpm_accept_mutex;
+
+ /* Allocate shared memory for scoreboard */
+ if (ap_scoreboard_image == NULL) {
+ void *sb_mem;
+ rc = DosAllocSharedMem(&sb_mem, ap_scoreboard_fname,
+ ap_calc_scoreboard_size(),
+ PAG_COMMIT|PAG_READ|PAG_WRITE);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00205)
+ "unable to allocate shared memory for scoreboard , exiting");
+ return !OK;
+ }
+
+ ap_init_scoreboard(sb_mem);
+ }
+
+ ap_scoreboard_image->global->restart_time = apr_time_now();
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00206)
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00207)
+ "Server built: %s", ap_get_server_built());
+ if (one_process) {
+ ap_scoreboard_image->parent[0].pid = getpid();
+ ap_mpm_child_main(pconf);
+ return DONE;
+ }
+
+ while (!restart_pending && !shutdown_pending) {
+ RESULTCODES proc_rc;
+ PID child_pid;
+ int active_children = 0;
+
+ /* Count number of active children */
+ for (slot=0; slot < HARD_SERVER_LIMIT; slot++) {
+ active_children += ap_scoreboard_image->parent[slot].pid != 0 &&
+ !ap_scoreboard_image->parent[slot].quiescing;
+ }
+
+ /* Spawn children if needed */
+ for (slot=0; slot < HARD_SERVER_LIMIT && active_children < ap_daemons_to_start; slot++) {
+ if (ap_scoreboard_image->parent[slot].pid == 0) {
+ spawn_child(slot);
+ active_children++;
+ }
+ }
+
+ rc = DosWaitChild(DCWA_PROCESSTREE, DCWW_NOWAIT, &proc_rc, &child_pid, 0);
+
+ if (rc == 0) {
+ /* A child has terminated, remove its scoreboard entry & terminate if necessary */
+ for (slot=0; ap_scoreboard_image->parent[slot].pid != child_pid && slot < HARD_SERVER_LIMIT; slot++);
+
+ if (slot < HARD_SERVER_LIMIT) {
+ ap_scoreboard_image->parent[slot].pid = 0;
+ ap_scoreboard_image->parent[slot].quiescing = 0;
+
+ if (proc_rc.codeTerminate == TC_EXIT) {
+ /* Child terminated normally, check its exit code and
+ * terminate server if child indicates a fatal error
+ */
+ if (proc_rc.codeResult == APEXIT_CHILDFATAL)
+ break;
+ }
+ }
+ } else if (rc == ERROR_CHILD_NOT_COMPLETE) {
+ /* No child exited, lets sleep for a while.... */
+ apr_sleep(SCOREBOARD_MAINTENANCE_INTERVAL);
+ }
+ }
+
+ /* Signal children to shut down, either gracefully or immediately */
+ for (slot=0; slot<HARD_SERVER_LIMIT; slot++) {
+ kill(ap_scoreboard_image->parent[slot].pid, is_graceful ? SIGHUP : SIGTERM);
+ }
+
+ DosFreeMem(parent_info);
+ return restart_pending ? OK : DONE;
+}
+
+
+
+static void spawn_child(int slot)
+{
+ PPIB ppib;
+ PTIB ptib;
+ char fail_module[100];
+ char progname[CCHMAXPATH];
+ RESULTCODES proc_rc;
+ ULONG rc;
+
+ ap_scoreboard_image->parent[slot].generation = ap_my_generation;
+ DosGetInfoBlocks(&ptib, &ppib);
+ DosQueryModuleName(ppib->pib_hmte, sizeof(progname), progname);
+ rc = DosExecPgm(fail_module, sizeof(fail_module), EXEC_ASYNCRESULT,
+ ppib->pib_pchcmd, NULL, &proc_rc, progname);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00208)
+ "error spawning child, slot %d", slot);
+ }
+
+ if (slot + 1 > ap_max_daemons_limit) {
+ ap_max_daemons_limit = slot + 1;
+ }
+
+ ap_scoreboard_image->parent[slot].pid = proc_rc.codeTerminate;
+}
+
+
+
+/* Signal handling routines */
+
+static void sig_term(int sig)
+{
+ shutdown_pending = 1;
+ signal(SIGTERM, SIG_DFL);
+}
+
+
+
+static void sig_restart(int sig)
+{
+ if (sig == SIGUSR1) {
+ is_graceful = 1;
+ }
+
+ restart_pending = 1;
+}
+
+
+
+static void set_signals()
+{
+ struct sigaction sa;
+
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0;
+ sa.sa_handler = sig_term;
+
+ if (sigaction(SIGTERM, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00209) "sigaction(SIGTERM)");
+
+ if (sigaction(SIGINT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00210) "sigaction(SIGINT)");
+
+ sa.sa_handler = sig_restart;
+
+ if (sigaction(SIGHUP, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00211) "sigaction(SIGHUP)");
+ if (sigaction(SIGUSR1, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00212) "sigaction(SIGUSR1)");
+}
+
+
+
+/* Enquiry functions used get MPM status info */
+
+static apr_status_t mpmt_os2_query(int query_code, int *result, apr_status_t *rv)
+{
+ *rv = APR_SUCCESS;
+
+ switch (query_code) {
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = ap_max_daemons_limit;
+ break;
+
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_DYNAMIC;
+ break;
+
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_NOT_SUPPORTED;
+ break;
+
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = HARD_SERVER_LIMIT;
+ break;
+
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = HARD_THREAD_LIMIT;
+ break;
+
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = 0;
+ break;
+
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = 0;
+ break;
+
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = ap_max_requests_per_child;
+ break;
+
+ case AP_MPMQ_GENERATION:
+ *result = ap_my_generation;
+ break;
+
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+
+ return OK;
+}
+
+
+
+
+static const char *mpmt_os2_get_name(void)
+{
+ return "mpmt_os2";
+}
+
+
+
+
+/* Configuration handling stuff */
+
+static int mpmt_os2_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+ one_process = ap_exists_config_define("ONE_PROCESS") ||
+ ap_exists_config_define("DEBUG");
+ is_graceful = 0;
+ ap_listen_pre_config();
+ ap_daemons_to_start = DEFAULT_START_DAEMON;
+ ap_thread_limit = HARD_THREAD_LIMIT;
+ ap_extended_status = 0;
+ ap_min_spare_threads = DEFAULT_MIN_SPARE_THREAD;
+ ap_max_spare_threads = DEFAULT_MAX_SPARE_THREAD;
+ ap_sys_privileges_handlers(1);
+
+ return OK;
+}
+
+
+
+static int mpmt_os2_check_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ static int restart_num = 0;
+ int startup = 0;
+
+ /* we want this only the first time around */
+ if (restart_num++ == 0) {
+ startup = 1;
+ }
+
+ if (ap_daemons_to_start < 0) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00213)
+ "WARNING: StartServers of %d not allowed, "
+ "increasing to 1.", ap_daemons_to_start);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00214)
+ "StartServers of %d not allowed, increasing to 1",
+ ap_daemons_to_start);
+ }
+ ap_daemons_to_start = 1;
+ }
+
+ if (ap_min_spare_threads < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00215)
+ "WARNING: MinSpareThreads of %d not allowed, "
+ "increasing to 1 to avoid almost certain server failure. "
+ "Please read the documentation.", ap_min_spare_threads);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00216)
+ "MinSpareThreads of %d not allowed, increasing to 1",
+ ap_min_spare_threads);
+ }
+ ap_min_spare_threads = 1;
+ }
+
+ return OK;
+}
+
+
+
+static void mpmt_os2_hooks(apr_pool_t *p)
+{
+ ap_hook_pre_config(mpmt_os2_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_check_config(mpmt_os2_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm(mpmt_os2_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(mpmt_os2_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(mpmt_os2_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_daemons_to_start = atoi(arg);
+ return NULL;
+}
+
+
+
+static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_min_spare_threads = atoi(arg);
+ return NULL;
+}
+
+
+
+static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_max_spare_threads = atoi(arg);
+ return NULL;
+}
+
+
+
+static const char *ignore_cmd(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ return NULL;
+}
+
+
+
+static const command_rec mpmt_os2_cmds[] = {
+LISTEN_COMMANDS,
+AP_INIT_TAKE1( "StartServers", set_daemons_to_start, NULL, RSRC_CONF,
+ "Number of child processes launched at server startup" ),
+AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
+ "Minimum number of idle children, to handle request spikes"),
+AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
+ "Maximum number of idle children"),
+AP_INIT_TAKE1("User", ignore_cmd, NULL, RSRC_CONF,
+ "Not applicable on this platform"),
+AP_INIT_TAKE1("Group", ignore_cmd, NULL, RSRC_CONF,
+ "Not applicable on this platform"),
+AP_INIT_TAKE1("ScoreBoardFile", ignore_cmd, NULL, RSRC_CONF, \
+ "Not applicable on this platform"),
+{ NULL }
+};
+
+AP_DECLARE_MODULE(mpm_mpmt_os2) = {
+ MPM20_MODULE_STUFF,
+ NULL, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ mpmt_os2_cmds, /* command apr_table_t */
+ mpmt_os2_hooks, /* register_hooks */
+};
diff --git a/server/mpm/mpmt_os2/mpmt_os2_child.c b/server/mpm/mpmt_os2/mpmt_os2_child.c
new file mode 100644
index 0000000..f405cd2
--- /dev/null
+++ b/server/mpm/mpmt_os2/mpmt_os2_child.c
@@ -0,0 +1,490 @@
+/* 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.
+ */
+
+#define INCL_NOPMAPI
+#define INCL_DOS
+#define INCL_DOSERRORS
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "mpm_default.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "scoreboard.h"
+#include "ap_mpm.h"
+#include "ap_listen.h"
+#include "apr_portable.h"
+#include "apr_poll.h"
+#include "mpm_common.h"
+#include "apr_strings.h"
+#include <os2.h>
+#include <process.h>
+
+APLOG_USE_MODULE(mpm_mpmt_os2);
+
+/* XXXXXX move these to header file private to this MPM */
+
+/* We don't need many processes,
+ * they're only for redundancy in the event of a crash
+ */
+#define HARD_SERVER_LIMIT 10
+
+/* Limit on the total number of threads per process
+ */
+#ifndef HARD_THREAD_LIMIT
+#define HARD_THREAD_LIMIT 256
+#endif
+
+#define ID_FROM_CHILD_THREAD(c, t) ((c * HARD_THREAD_LIMIT) + t)
+
+typedef struct {
+ apr_pool_t *pconn;
+ apr_socket_t *conn_sd;
+} worker_args_t;
+
+#define WORKTYPE_CONN 0
+#define WORKTYPE_EXIT 1
+
+static apr_pool_t *pchild = NULL;
+static int child_slot;
+static int shutdown_pending = 0;
+extern int ap_my_generation;
+static int volatile is_graceful = 1;
+HEV shutdown_event; /* signaled when this child is shutting down */
+
+/* grab some MPM globals */
+extern int ap_min_spare_threads;
+extern int ap_max_spare_threads;
+extern HMTX ap_mpm_accept_mutex;
+
+static void worker_main(void *vpArg);
+static void clean_child_exit(int code);
+static void set_signals();
+static void server_maintenance(void *vpArg);
+
+
+static void clean_child_exit(int code)
+{
+ if (pchild) {
+ apr_pool_destroy(pchild);
+ }
+
+ exit(code);
+}
+
+
+
+void ap_mpm_child_main(apr_pool_t *pconf)
+{
+ ap_listen_rec *lr = NULL;
+ int requests_this_child = 0;
+ int rv = 0;
+ unsigned long ulTimes;
+ int my_pid = getpid();
+ ULONG rc, c;
+ HQUEUE workq;
+ apr_pollset_t *pollset;
+ int num_listeners;
+ TID server_maint_tid;
+ void *sb_mem;
+
+ /* Stop Ctrl-C/Ctrl-Break signals going to child processes */
+ DosSetSignalExceptionFocus(0, &ulTimes);
+ set_signals();
+
+ /* Create pool for child */
+ apr_pool_create(&pchild, pconf);
+ apr_pool_tag(pchild, "pchild");
+
+ ap_run_child_init(pchild, ap_server_conf);
+
+ /* Create an event semaphore used to trigger other threads to shutdown */
+ rc = DosCreateEventSem(NULL, &shutdown_event, 0, FALSE);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00189)
+ "unable to create shutdown semaphore, exiting");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Gain access to the scoreboard. */
+ rc = DosGetNamedSharedMem(&sb_mem, ap_scoreboard_fname,
+ PAG_READ|PAG_WRITE);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00190)
+ "scoreboard not readable in child, exiting");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ ap_calc_scoreboard_size();
+ ap_init_scoreboard(sb_mem);
+
+ /* Gain access to the accpet mutex */
+ rc = DosOpenMutexSem(NULL, &ap_mpm_accept_mutex);
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00191)
+ "accept mutex couldn't be accessed in child, exiting");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Find our pid in the scoreboard so we know what slot our parent allocated us */
+ for (child_slot = 0; ap_scoreboard_image->parent[child_slot].pid != my_pid && child_slot < HARD_SERVER_LIMIT; child_slot++);
+
+ if (child_slot == HARD_SERVER_LIMIT) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00192)
+ "child pid not found in scoreboard, exiting");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ ap_my_generation = ap_scoreboard_image->parent[child_slot].generation;
+ memset(ap_scoreboard_image->servers[child_slot], 0, sizeof(worker_score) * HARD_THREAD_LIMIT);
+
+ /* Set up an OS/2 queue for passing connections & termination requests
+ * to worker threads
+ */
+ rc = DosCreateQueue(&workq, QUE_FIFO, apr_psprintf(pchild, "/queues/httpd/work.%d", my_pid));
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00193)
+ "unable to create work queue, exiting");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Create initial pool of worker threads */
+ for (c = 0; c < ap_min_spare_threads; c++) {
+// ap_scoreboard_image->servers[child_slot][c].tid = _beginthread(worker_main, NULL, 128*1024, (void *)c);
+ }
+
+ /* Start maintenance thread */
+ server_maint_tid = _beginthread(server_maintenance, NULL, 32768, NULL);
+
+ /* Set up poll */
+ for (num_listeners = 0, lr = ap_listeners; lr; lr = lr->next) {
+ num_listeners++;
+ }
+
+ apr_pollset_create(&pollset, num_listeners, pchild, 0);
+
+ for (lr = ap_listeners; lr != NULL; lr = lr->next) {
+ apr_pollfd_t pfd = { 0 };
+
+ pfd.desc_type = APR_POLL_SOCKET;
+ pfd.desc.s = lr->sd;
+ pfd.reqevents = APR_POLLIN;
+ pfd.client_data = lr;
+ apr_pollset_add(pollset, &pfd);
+ }
+
+ /* Main connection accept loop */
+ do {
+ apr_pool_t *pconn;
+ worker_args_t *worker_args;
+ int last_poll_idx = 0;
+
+ apr_pool_create(&pconn, pchild);
+ apr_pool_tag(pconn, "transaction");
+ worker_args = apr_palloc(pconn, sizeof(worker_args_t));
+ worker_args->pconn = pconn;
+
+ if (num_listeners == 1) {
+ rv = apr_socket_accept(&worker_args->conn_sd, ap_listeners->sd, pconn);
+ } else {
+ const apr_pollfd_t *poll_results;
+ apr_int32_t num_poll_results;
+
+ rc = DosRequestMutexSem(ap_mpm_accept_mutex, SEM_INDEFINITE_WAIT);
+
+ if (shutdown_pending) {
+ DosReleaseMutexSem(ap_mpm_accept_mutex);
+ break;
+ }
+
+ rv = APR_FROM_OS_ERROR(rc);
+
+ if (rv == APR_SUCCESS) {
+ rv = apr_pollset_poll(pollset, -1, &num_poll_results, &poll_results);
+ DosReleaseMutexSem(ap_mpm_accept_mutex);
+ }
+
+ if (rv == APR_SUCCESS) {
+ if (last_poll_idx >= num_listeners) {
+ last_poll_idx = 0;
+ }
+
+ lr = poll_results[last_poll_idx++].client_data;
+ rv = apr_socket_accept(&worker_args->conn_sd, lr->sd, pconn);
+ last_poll_idx++;
+ }
+ }
+
+ if (rv != APR_SUCCESS) {
+ if (!APR_STATUS_IS_EINTR(rv)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00194)
+ "apr_socket_accept");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ } else {
+ DosWriteQueue(workq, WORKTYPE_CONN, sizeof(worker_args_t), worker_args, 0);
+ requests_this_child++;
+ }
+
+ if (ap_max_requests_per_child != 0 && requests_this_child >= ap_max_requests_per_child)
+ break;
+ } while (!shutdown_pending && ap_my_generation == ap_scoreboard_image->global->running_generation);
+
+ ap_scoreboard_image->parent[child_slot].quiescing = 1;
+ DosPostEventSem(shutdown_event);
+ DosWaitThread(&server_maint_tid, DCWW_WAIT);
+
+ if (is_graceful) {
+ char someleft;
+
+ /* tell our worker threads to exit */
+ for (c=0; c<HARD_THREAD_LIMIT; c++) {
+ if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) {
+ DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0);
+ }
+ }
+
+ do {
+ someleft = 0;
+
+ for (c=0; c<HARD_THREAD_LIMIT; c++) {
+ if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) {
+ someleft = 1;
+ DosSleep(1000);
+ break;
+ }
+ }
+ } while (someleft);
+ } else {
+ DosPurgeQueue(workq);
+
+ for (c=0; c<HARD_THREAD_LIMIT; c++) {
+ if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) {
+ DosKillThread(ap_scoreboard_image->servers[child_slot][c].tid);
+ }
+ }
+ }
+
+ apr_pool_destroy(pchild);
+}
+
+
+
+void add_worker()
+{
+ int thread_slot;
+ int stacksize = ap_thread_stacksize == 0 ? 128*1024 : ap_thread_stacksize;
+
+ /* Find a free thread slot */
+ for (thread_slot=0; thread_slot < HARD_THREAD_LIMIT; thread_slot++) {
+ if (ap_scoreboard_image->servers[child_slot][thread_slot].status == SERVER_DEAD) {
+ ap_scoreboard_image->servers[child_slot][thread_slot].status = SERVER_STARTING;
+ ap_scoreboard_image->servers[child_slot][thread_slot].tid =
+ _beginthread(worker_main, NULL, stacksize, (void *)thread_slot);
+ break;
+ }
+ }
+}
+
+
+
+ULONG APIENTRY thread_exception_handler(EXCEPTIONREPORTRECORD *pReportRec,
+ EXCEPTIONREGISTRATIONRECORD *pRegRec,
+ CONTEXTRECORD *pContext,
+ PVOID p)
+{
+ int c;
+
+ if (pReportRec->fHandlerFlags & EH_NESTED_CALL) {
+ return XCPT_CONTINUE_SEARCH;
+ }
+
+ if (pReportRec->ExceptionNum == XCPT_ACCESS_VIOLATION ||
+ pReportRec->ExceptionNum == XCPT_INTEGER_DIVIDE_BY_ZERO) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00195)
+ "caught exception in worker thread, initiating child shutdown pid=%d", getpid());
+ for (c=0; c<HARD_THREAD_LIMIT; c++) {
+ if (ap_scoreboard_image->servers[child_slot][c].tid == _gettid()) {
+ ap_scoreboard_image->servers[child_slot][c].status = SERVER_DEAD;
+ break;
+ }
+ }
+
+ /* Shut down process ASAP, it could be quite unhealthy & leaking resources */
+ shutdown_pending = 1;
+ ap_scoreboard_image->parent[child_slot].quiescing = 1;
+ kill(getpid(), SIGHUP);
+ DosUnwindException(UNWIND_ALL, 0, 0);
+ }
+
+ return XCPT_CONTINUE_SEARCH;
+}
+
+
+
+static void worker_main(void *vpArg)
+{
+ apr_thread_t *thd = NULL;
+ apr_os_thread_t osthd;
+ long conn_id;
+ conn_rec *current_conn;
+ apr_pool_t *pconn;
+ apr_allocator_t *allocator;
+ apr_bucket_alloc_t *bucket_alloc;
+ worker_args_t *worker_args;
+ HQUEUE workq;
+ PID owner;
+ int rc;
+ REQUESTDATA rd;
+ ULONG len;
+ BYTE priority;
+ int thread_slot = (int)vpArg;
+ EXCEPTIONREGISTRATIONRECORD reg_rec = { NULL, thread_exception_handler };
+ ap_sb_handle_t *sbh;
+
+ /* Trap exceptions in this thread so we don't take down the whole process */
+ DosSetExceptionHandler( &reg_rec );
+
+ osthd = apr_os_thread_current();
+ apr_os_thread_put(&thd, &osthd, pchild);
+
+ rc = DosOpenQueue(&owner, &workq,
+ apr_psprintf(pchild, "/queues/httpd/work.%d", getpid()));
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00196)
+ "unable to open work queue, exiting");
+ ap_scoreboard_image->servers[child_slot][thread_slot].tid = 0;
+ }
+
+ conn_id = ID_FROM_CHILD_THREAD(child_slot, thread_slot);
+ ap_update_child_status_from_indexes(child_slot, thread_slot, SERVER_READY,
+ NULL);
+
+ apr_allocator_create(&allocator);
+ apr_allocator_max_free_set(allocator, ap_max_mem_free);
+ bucket_alloc = apr_bucket_alloc_create_ex(allocator);
+
+ while (rc = DosReadQueue(workq, &rd, &len, (PPVOID)&worker_args, 0, DCWW_WAIT, &priority, NULLHANDLE),
+ rc == 0 && rd.ulData != WORKTYPE_EXIT) {
+ pconn = worker_args->pconn;
+ ap_create_sb_handle(&sbh, pconn, child_slot, thread_slot);
+ current_conn = ap_run_create_connection(pconn, ap_server_conf,
+ worker_args->conn_sd, conn_id,
+ sbh, bucket_alloc);
+
+ if (current_conn) {
+ current_conn->current_thread = thd;
+ ap_process_connection(current_conn, worker_args->conn_sd);
+ ap_lingering_close(current_conn);
+ }
+
+ apr_pool_destroy(pconn);
+ ap_update_child_status_from_indexes(child_slot, thread_slot,
+ SERVER_READY, NULL);
+ }
+
+ ap_update_child_status_from_indexes(child_slot, thread_slot, SERVER_DEAD,
+ NULL);
+
+ apr_bucket_alloc_destroy(bucket_alloc);
+ apr_allocator_destroy(allocator);
+}
+
+
+
+static void server_maintenance(void *vpArg)
+{
+ int num_idle, num_needed;
+ ULONG num_pending = 0;
+ int threadnum;
+ HQUEUE workq;
+ ULONG rc;
+ PID owner;
+
+ rc = DosOpenQueue(&owner, &workq,
+ apr_psprintf(pchild, "/queues/httpd/work.%d", getpid()));
+
+ if (rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, APLOGNO(00197)
+ "unable to open work queue in maintenance thread");
+ return;
+ }
+
+ do {
+ for (num_idle=0, threadnum=0; threadnum < HARD_THREAD_LIMIT; threadnum++) {
+ num_idle += ap_scoreboard_image->servers[child_slot][threadnum].status == SERVER_READY;
+ }
+
+ DosQueryQueue(workq, &num_pending);
+ num_needed = ap_min_spare_threads - num_idle + num_pending;
+
+ if (num_needed > 0) {
+ for (threadnum=0; threadnum < num_needed; threadnum++) {
+ add_worker();
+ }
+ }
+
+ if (num_idle - num_pending > ap_max_spare_threads) {
+ DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0);
+ }
+ } while (DosWaitEventSem(shutdown_event, 500) == ERROR_TIMEOUT);
+}
+
+
+
+/* Signal handling routines */
+
+static void sig_term(int sig)
+{
+ shutdown_pending = 1;
+ is_graceful = 0;
+ signal(SIGTERM, SIG_DFL);
+}
+
+
+
+static void sig_hup(int sig)
+{
+ shutdown_pending = 1;
+ is_graceful = 1;
+}
+
+
+
+static void set_signals()
+{
+ struct sigaction sa;
+
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0;
+ sa.sa_handler = sig_term;
+
+ if (sigaction(SIGTERM, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00198) "sigaction(SIGTERM)");
+
+ sa.sa_handler = sig_hup;
+
+ if (sigaction(SIGHUP, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00199) "sigaction(SIGHUP)");
+}
diff --git a/server/mpm/netware/mpm_default.h b/server/mpm/netware/mpm_default.h
new file mode 100644
index 0000000..f7783ce
--- /dev/null
+++ b/server/mpm/netware/mpm_default.h
@@ -0,0 +1,78 @@
+/* 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 netware/mpm_default.h
+ * @brief Defaults for Netware MPM
+ *
+ * @defgroup APACHE_MPM_NETWARE Netware MPM
+ * @ingroup APACHE_INTERNAL
+ * @{
+ */
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Limit on the threads per process. Clients will be locked out if more than
+ * this * HARD_SERVER_LIMIT are needed.
+ *
+ * We keep this for one reason it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef HARD_THREAD_LIMIT
+#define HARD_THREAD_LIMIT 2048
+#endif
+
+#ifndef DEFAULT_THREADS_PER_CHILD
+#define DEFAULT_THREADS_PER_CHILD 50
+#endif
+
+/* Number of threads to spawn off by default --- also, if fewer than
+ * this free when the caretaker checks, it will spawn more.
+ */
+#ifndef DEFAULT_START_THREADS
+#define DEFAULT_START_THREADS DEFAULT_THREADS_PER_CHILD
+#endif
+
+/* Maximum number of *free* threads --- more than this, and
+ * they will die off.
+ */
+
+#ifndef DEFAULT_MAX_FREE_THREADS
+#define DEFAULT_MAX_FREE_THREADS 100
+#endif
+
+/* Minimum --- fewer than this, and more will be created */
+
+#ifndef DEFAULT_MIN_FREE_THREADS
+#define DEFAULT_MIN_FREE_THREADS 10
+#endif
+
+/*
+ * Interval, in microseconds, between scoreboard maintenance.
+ */
+#ifndef SCOREBOARD_MAINTENANCE_INTERVAL
+#define SCOREBOARD_MAINTENANCE_INTERVAL 1000000
+#endif
+
+/* Default stack size allocated for each worker thread.
+ */
+#ifndef DEFAULT_THREAD_STACKSIZE
+#define DEFAULT_THREAD_STACKSIZE 65536
+#endif
+
+#endif /* AP_MPM_DEFAULT_H */
+/** @} */
diff --git a/server/mpm/netware/mpm_netware.c b/server/mpm/netware/mpm_netware.c
new file mode 100644
index 0000000..e89fdef
--- /dev/null
+++ b/server/mpm/netware/mpm_netware.c
@@ -0,0 +1,1365 @@
+/* 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.
+ */
+
+/*
+ * httpd.c: simple http daemon for answering WWW file requests
+ *
+ *
+ * 03-21-93 Rob McCool wrote original code (up to NCSA HTTPd 1.3)
+ *
+ * 03-06-95 blong
+ * changed server number for child-alone processes to 0 and changed name
+ * of processes
+ *
+ * 03-10-95 blong
+ * Added numerous speed hacks proposed by Robert S. Thau (rst@ai.mit.edu)
+ * including set group before fork, and call gettime before to fork
+ * to set up libraries.
+ *
+ * 04-14-95 rst / rh
+ * Brandon's code snarfed from NCSA 1.4, but tinkered to work with the
+ * Apache server, and also to have child processes do accept() directly.
+ *
+ * April-July '95 rst
+ * Extensive rework for Apache.
+ */
+
+#include "apr.h"
+#include "apr_portable.h"
+#include "apr_strings.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+#include "apr_tables.h"
+#include "apr_getopt.h"
+#include "apr_thread_mutex.h"
+
+#define APR_WANT_STDIO
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifndef USE_WINSOCK
+#include <sys/select.h>
+#endif
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "mpm_default.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "scoreboard.h"
+#include "ap_mpm.h"
+#include "mpm_common.h"
+#include "ap_listen.h"
+#include "ap_mmn.h"
+
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+
+#include <signal.h>
+
+#include <netware.h>
+#include <nks/netware.h>
+#include <library.h>
+#include <screen.h>
+
+int nlmUnloadSignaled(int wait);
+
+/* Limit on the total --- clients will be locked out if more servers than
+ * this are needed. It is intended solely to keep the server from crashing
+ * when things get out of hand.
+ *
+ * We keep a hard maximum number of servers, for two reasons --- first off,
+ * in case something goes seriously wrong, we want to stop the fork bomb
+ * short of actually crashing the machine we're running on by filling some
+ * kernel table. Secondly, it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef HARD_SERVER_LIMIT
+#define HARD_SERVER_LIMIT 1
+#endif
+
+#define WORKER_DEAD SERVER_DEAD
+#define WORKER_STARTING SERVER_STARTING
+#define WORKER_READY SERVER_READY
+#define WORKER_IDLE_KILL SERVER_IDLE_KILL
+
+#define MPM_HARD_LIMITS_FILE "/mpm_default.h"
+
+/* *Non*-shared http_main globals... */
+
+static int ap_threads_per_child=0; /* Worker threads per child */
+static int ap_threads_to_start=0;
+static int ap_threads_min_free=0;
+static int ap_threads_max_free=0;
+static int ap_threads_limit=0;
+static int mpm_state = AP_MPMQ_STARTING;
+
+/*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxRequestWorkers changes across SIGWINCH restarts. We use this
+ * value to optimize routines that have to scan the entire scoreboard.
+ */
+static int ap_max_workers_limit = -1;
+
+int hold_screen_on_exit = 0; /* Indicates whether the screen should be held open */
+
+static fd_set listenfds;
+static int listenmaxfd;
+
+static apr_pool_t *pconf; /* Pool for config stuff */
+static apr_pool_t *pmain; /* Pool for httpd child stuff */
+
+static pid_t ap_my_pid; /* it seems silly to call getpid all the time */
+static char *ap_my_addrspace = NULL;
+
+static int die_now = 0;
+
+/* Keep track of the number of worker threads currently active */
+static unsigned long worker_thread_count;
+static int request_count;
+
+/* Structure used to register/deregister a console handler with the OS */
+static int InstallConsoleHandler(void);
+static void RemoveConsoleHandler(void);
+static int CommandLineInterpreter(scr_t screenID, const char *commandLine);
+static CommandParser_t ConsoleHandler = {0, NULL, 0};
+#define HANDLEDCOMMAND 0
+#define NOTMYCOMMAND 1
+
+static int show_settings = 0;
+
+//#define DBINFO_ON
+//#define DBPRINT_ON
+#ifdef DBPRINT_ON
+#define DBPRINT0(s) printf(s)
+#define DBPRINT1(s,v1) printf(s,v1)
+#define DBPRINT2(s,v1,v2) printf(s,v1,v2)
+#else
+#define DBPRINT0(s)
+#define DBPRINT1(s,v1)
+#define DBPRINT2(s,v1,v2)
+#endif
+
+/* volatile just in case */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile is_graceful;
+static int volatile wait_to_finish=1;
+static ap_generation_t volatile ap_my_generation=0;
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code, int worker_num, apr_pool_t *ptrans,
+ apr_bucket_alloc_t *bucket_alloc) __attribute__ ((noreturn));
+static void clean_child_exit(int code, int worker_num, apr_pool_t *ptrans,
+ apr_bucket_alloc_t *bucket_alloc)
+{
+ apr_bucket_alloc_destroy(bucket_alloc);
+ if (!shutdown_pending) {
+ apr_pool_destroy(ptrans);
+ }
+
+ atomic_dec (&worker_thread_count);
+ if (worker_num >=0)
+ ap_update_child_status_from_indexes(0, worker_num, WORKER_DEAD,
+ (request_rec *) NULL);
+ NXThreadExit((void*)&code);
+}
+
+/* proper cleanup when returning from ap_mpm_run() */
+static void mpm_main_cleanup(void)
+{
+ if (pmain) {
+ apr_pool_destroy(pmain);
+ }
+}
+
+static int netware_query(int query_code, int *result, apr_status_t *rv)
+{
+ *rv = APR_SUCCESS;
+ switch(query_code){
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = 1;
+ break;
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_DYNAMIC;
+ break;
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_NOT_SUPPORTED;
+ break;
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = HARD_SERVER_LIMIT;
+ break;
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = HARD_THREAD_LIMIT;
+ break;
+ case AP_MPMQ_MAX_THREADS:
+ *result = ap_threads_limit;
+ break;
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MIN_SPARE_THREADS:
+ *result = ap_threads_min_free;
+ break;
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_THREADS:
+ *result = ap_threads_max_free;
+ break;
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = ap_max_requests_per_child;
+ break;
+ case AP_MPMQ_MAX_DAEMONS:
+ *result = 1;
+ break;
+ case AP_MPMQ_MPM_STATE:
+ *result = mpm_state;
+ break;
+ case AP_MPMQ_GENERATION:
+ *result = ap_my_generation;
+ break;
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+ return OK;
+}
+
+static const char *netware_get_name(void)
+{
+ return "NetWare";
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static void mpm_term(void)
+{
+ RemoveConsoleHandler();
+ wait_to_finish = 0;
+ NXThreadYield();
+}
+
+static void sig_term(int sig)
+{
+ if (shutdown_pending == 1) {
+ /* Um, is this _probably_ not an error, if the user has
+ * tried to do a shutdown twice quickly, so we won't
+ * worry about reporting it.
+ */
+ return;
+ }
+ shutdown_pending = 1;
+
+ DBPRINT0 ("waiting for threads\n");
+ while (wait_to_finish) {
+ apr_thread_yield();
+ }
+ DBPRINT0 ("goodbye\n");
+}
+
+/* restart() is the signal handler for SIGHUP and SIGWINCH
+ * in the parent process, unless running in ONE_PROCESS mode
+ */
+static void restart(void)
+{
+ if (restart_pending == 1) {
+ /* Probably not an error - don't bother reporting it */
+ return;
+ }
+ restart_pending = 1;
+ is_graceful = 1;
+}
+
+static void set_signals(void)
+{
+ apr_signal(SIGTERM, sig_term);
+ apr_signal(SIGABRT, sig_term);
+}
+
+int nlmUnloadSignaled(int wait)
+{
+ shutdown_pending = 1;
+
+ if (wait) {
+ while (wait_to_finish) {
+ NXThreadYield();
+ }
+ }
+
+ return 0;
+}
+
+/*****************************************************************
+ * Child process main loop.
+ * The following vars are static to avoid getting clobbered by longjmp();
+ * they are really private to child_main.
+ */
+
+
+#define MAX_WB_RETRIES 3
+#ifdef DBINFO_ON
+static int would_block = 0;
+static int retry_success = 0;
+static int retry_fail = 0;
+static int avg_retries = 0;
+#endif
+
+/*static */
+void worker_main(void *arg)
+{
+ ap_listen_rec *lr, *first_lr, *last_lr = NULL;
+ apr_pool_t *ptrans;
+ apr_allocator_t *allocator;
+ apr_bucket_alloc_t *bucket_alloc;
+ conn_rec *current_conn;
+ apr_status_t stat = APR_EINIT;
+ ap_sb_handle_t *sbh;
+ apr_thread_t *thd = NULL;
+ apr_os_thread_t osthd;
+
+ int my_worker_num = (int)arg;
+ apr_socket_t *csd = NULL;
+ int requests_this_child = 0;
+ apr_socket_t *sd = NULL;
+ fd_set main_fds;
+
+ int sockdes;
+ int srv;
+ struct timeval tv;
+ int wouldblock_retry;
+
+ osthd = apr_os_thread_current();
+ apr_os_thread_put(&thd, &osthd, pmain);
+
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+
+ apr_allocator_create(&allocator);
+ apr_allocator_max_free_set(allocator, ap_max_mem_free);
+
+ apr_pool_create_ex(&ptrans, pmain, NULL, allocator);
+ apr_allocator_owner_set(allocator, ptrans);
+ apr_pool_tag(ptrans, "transaction");
+
+ bucket_alloc = apr_bucket_alloc_create_ex(allocator);
+
+ atomic_inc (&worker_thread_count);
+
+ while (!die_now) {
+ /*
+ * (Re)initialize this child to a pre-connection state.
+ */
+ current_conn = NULL;
+ apr_pool_clear(ptrans);
+
+ if ((ap_max_requests_per_child > 0
+ && requests_this_child++ >= ap_max_requests_per_child)) {
+ DBPRINT1 ("\n**Thread slot %d is shutting down", my_worker_num);
+ clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
+ }
+
+ ap_update_child_status_from_indexes(0, my_worker_num, WORKER_READY,
+ (request_rec *) NULL);
+
+ /*
+ * Wait for an acceptable connection to arrive.
+ */
+
+ for (;;) {
+ if (shutdown_pending || restart_pending || (ap_scoreboard_image->servers[0][my_worker_num].status == WORKER_IDLE_KILL)) {
+ DBPRINT1 ("\nThread slot %d is shutting down\n", my_worker_num);
+ clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
+ }
+
+ /* Check the listen queue on all sockets for requests */
+ memcpy(&main_fds, &listenfds, sizeof(fd_set));
+ srv = select(listenmaxfd + 1, &main_fds, NULL, NULL, &tv);
+
+ if (srv <= 0) {
+ if (srv < 0) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00217)
+ "select() failed on listen socket");
+ apr_thread_yield();
+ }
+ continue;
+ }
+
+ /* remember the last_lr we searched last time around so that
+ we don't end up starving any particular listening socket */
+ if (last_lr == NULL) {
+ lr = ap_listeners;
+ }
+ else {
+ lr = last_lr->next;
+ if (!lr)
+ lr = ap_listeners;
+ }
+ first_lr = lr;
+ do {
+ apr_os_sock_get(&sockdes, lr->sd);
+ if (FD_ISSET(sockdes, &main_fds))
+ goto got_listener;
+ lr = lr->next;
+ if (!lr)
+ lr = ap_listeners;
+ } while (lr != first_lr);
+ /* if we get here, something unexpected happened. Go back
+ into the select state and try again.
+ */
+ continue;
+ got_listener:
+ last_lr = lr;
+ sd = lr->sd;
+
+ wouldblock_retry = MAX_WB_RETRIES;
+
+ while (wouldblock_retry) {
+ if ((stat = apr_socket_accept(&csd, sd, ptrans)) == APR_SUCCESS) {
+ break;
+ }
+ else {
+ /* if the error is a wouldblock then maybe we were too
+ quick try to pull the next request from the listen
+ queue. Try a few more times then return to our idle
+ listen state. */
+ if (!APR_STATUS_IS_EAGAIN(stat)) {
+ break;
+ }
+
+ if (wouldblock_retry--) {
+ apr_thread_yield();
+ }
+ }
+ }
+
+ /* If we got a new socket, set it to non-blocking mode and process
+ it. Otherwise handle the error. */
+ if (stat == APR_SUCCESS) {
+ apr_socket_opt_set(csd, APR_SO_NONBLOCK, 0);
+#ifdef DBINFO_ON
+ if (wouldblock_retry < MAX_WB_RETRIES) {
+ retry_success++;
+ avg_retries += (MAX_WB_RETRIES-wouldblock_retry);
+ }
+#endif
+ break; /* We have a socket ready for reading */
+ }
+ else {
+#ifdef DBINFO_ON
+ if (APR_STATUS_IS_EAGAIN(stat)) {
+ would_block++;
+ retry_fail++;
+ }
+ else if (
+#else
+ if (APR_STATUS_IS_EAGAIN(stat) ||
+#endif
+ APR_STATUS_IS_ECONNRESET(stat) ||
+ APR_STATUS_IS_ETIMEDOUT(stat) ||
+ APR_STATUS_IS_EHOSTUNREACH(stat) ||
+ APR_STATUS_IS_ENETUNREACH(stat)) {
+ ;
+ }
+#ifdef USE_WINSOCK
+ else if (APR_STATUS_IS_ENETDOWN(stat)) {
+ /*
+ * When the network layer has been shut down, there
+ * is not much use in simply exiting: the parent
+ * would simply re-create us (and we'd fail again).
+ * Use the CHILDFATAL code to tear the server down.
+ * @@@ Martin's idea for possible improvement:
+ * A different approach would be to define
+ * a new APEXIT_NETDOWN exit code, the reception
+ * of which would make the parent shutdown all
+ * children, then idle-loop until it detected that
+ * the network is up again, and restart the children.
+ * Ben Hyde noted that temporary ENETDOWN situations
+ * occur in mobile IP.
+ */
+ ap_log_error(APLOG_MARK, APLOG_EMERG, stat, ap_server_conf, APLOGNO(00218)
+ "apr_socket_accept: giving up.");
+ clean_child_exit(APEXIT_CHILDFATAL, my_worker_num, ptrans,
+ bucket_alloc);
+ }
+#endif
+ else {
+ ap_log_error(APLOG_MARK, APLOG_ERR, stat, ap_server_conf, APLOGNO(00219)
+ "apr_socket_accept: (client socket)");
+ clean_child_exit(1, my_worker_num, ptrans, bucket_alloc);
+ }
+ }
+ }
+
+ ap_create_sb_handle(&sbh, ptrans, 0, my_worker_num);
+ /*
+ * We now have a connection, so set it up with the appropriate
+ * socket options, file descriptors, and read/write buffers.
+ */
+ current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd,
+ my_worker_num, sbh,
+ bucket_alloc);
+ if (current_conn) {
+ current_conn->current_thread = thd;
+ ap_process_connection(current_conn, csd);
+ ap_lingering_close(current_conn);
+ }
+ request_count++;
+ }
+ clean_child_exit(0, my_worker_num, ptrans, bucket_alloc);
+}
+
+
+static int make_child(server_rec *s, int slot)
+{
+ int tid;
+ int err=0;
+ NXContext_t ctx;
+
+ if (slot + 1 > ap_max_workers_limit) {
+ ap_max_workers_limit = slot + 1;
+ }
+
+ ap_update_child_status_from_indexes(0, slot, WORKER_STARTING,
+ (request_rec *) NULL);
+
+ if (ctx = NXContextAlloc((void (*)(void *)) worker_main, (void*)slot, NX_PRIO_MED, ap_thread_stacksize, NX_CTX_NORMAL, &err)) {
+ char threadName[32];
+
+ sprintf (threadName, "Apache_Worker %d", slot);
+ NXContextSetName(ctx, threadName);
+ err = NXThreadCreate(ctx, NX_THR_BIND_CONTEXT, &tid);
+ if (err) {
+ NXContextFree (ctx);
+ }
+ }
+
+ if (err) {
+ /* create thread didn't succeed. Fix the scoreboard or else
+ * it will say SERVER_STARTING forever and ever
+ */
+ ap_update_child_status_from_indexes(0, slot, WORKER_DEAD,
+ (request_rec *) NULL);
+
+ /* In case system resources are maxxed out, we don't want
+ Apache running away with the CPU trying to fork over and
+ over and over again. */
+ apr_thread_yield();
+
+ return -1;
+ }
+
+ ap_scoreboard_image->servers[0][slot].tid = tid;
+
+ return 0;
+}
+
+
+/* start up a bunch of worker threads */
+static void startup_workers(int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < ap_threads_limit; ++i) {
+ if (ap_scoreboard_image->servers[0][i].status != WORKER_DEAD) {
+ continue;
+ }
+ if (make_child(ap_server_conf, i) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+
+/*
+ * idle_spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers. It is
+ * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
+ * without the need to spawn.
+ */
+static int idle_spawn_rate = 1;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (64)
+#endif
+static int hold_off_on_exponential_spawning;
+
+static void perform_idle_server_maintenance(apr_pool_t *p)
+{
+ int i;
+ int idle_count;
+ worker_score *ws;
+ int free_length;
+ int free_slots[MAX_SPAWN_RATE];
+ int last_non_dead;
+ int total_non_dead;
+
+ /* initialize the free_list */
+ free_length = 0;
+
+ idle_count = 0;
+ last_non_dead = -1;
+ total_non_dead = 0;
+
+ for (i = 0; i < ap_threads_limit; ++i) {
+ int status;
+
+ if (i >= ap_max_workers_limit && free_length == idle_spawn_rate)
+ break;
+ ws = &ap_scoreboard_image->servers[0][i];
+ status = ws->status;
+ if (status == WORKER_DEAD) {
+ /* try to keep children numbers as low as possible */
+ if (free_length < idle_spawn_rate) {
+ free_slots[free_length] = i;
+ ++free_length;
+ }
+ }
+ else if (status == WORKER_IDLE_KILL) {
+ /* If it is already marked to die, skip it */
+ continue;
+ }
+ else {
+ /* We consider a starting server as idle because we started it
+ * at least a cycle ago, and if it still hasn't finished starting
+ * then we're just going to swamp things worse by forking more.
+ * So we hopefully won't need to fork more if we count it.
+ * This depends on the ordering of SERVER_READY and SERVER_STARTING.
+ */
+ if (status <= WORKER_READY) {
+ ++ idle_count;
+ }
+
+ ++total_non_dead;
+ last_non_dead = i;
+ }
+ }
+ DBPRINT2("Total: %d Idle Count: %d \r", total_non_dead, idle_count);
+ ap_max_workers_limit = last_non_dead + 1;
+ if (idle_count > ap_threads_max_free) {
+ /* kill off one child... we use the pod because that'll cause it to
+ * shut down gracefully, in case it happened to pick up a request
+ * while we were counting
+ */
+ idle_spawn_rate = 1;
+ ap_update_child_status_from_indexes(0, last_non_dead, WORKER_IDLE_KILL,
+ (request_rec *) NULL);
+ DBPRINT1("\nKilling idle thread: %d\n", last_non_dead);
+ }
+ else if (idle_count < ap_threads_min_free) {
+ /* terminate the free list */
+ if (free_length == 0) {
+ /* only report this condition once */
+ static int reported = 0;
+
+ if (!reported) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00220)
+ "server reached MaxRequestWorkers setting, consider"
+ " raising the MaxRequestWorkers setting");
+ reported = 1;
+ }
+ idle_spawn_rate = 1;
+ }
+ else {
+ if (idle_spawn_rate >= 8) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00221)
+ "server seems busy, (you may need "
+ "to increase StartServers, or Min/MaxSpareServers), "
+ "spawning %d children, there are %d idle, and "
+ "%d total children", idle_spawn_rate,
+ idle_count, total_non_dead);
+ }
+ DBPRINT0("\n");
+ for (i = 0; i < free_length; ++i) {
+ DBPRINT1("Spawning additional thread slot: %d\n", free_slots[i]);
+ make_child(ap_server_conf, free_slots[i]);
+ }
+ /* the next time around we want to spawn twice as many if this
+ * wasn't good enough, but not if we've just done a graceful
+ */
+ if (hold_off_on_exponential_spawning) {
+ --hold_off_on_exponential_spawning;
+ }
+ else if (idle_spawn_rate < MAX_SPAWN_RATE) {
+ idle_spawn_rate *= 2;
+ }
+ }
+ }
+ else {
+ idle_spawn_rate = 1;
+ }
+}
+
+static void display_settings()
+{
+ int status_array[SERVER_NUM_STATUS];
+ int i, status, total=0;
+ int reqs = request_count;
+#ifdef DBINFO_ON
+ int wblock = would_block;
+
+ would_block = 0;
+#endif
+
+ request_count = 0;
+
+ ClearScreen (getscreenhandle());
+ printf("%s \n", ap_get_server_description());
+
+ for (i=0;i<SERVER_NUM_STATUS;i++) {
+ status_array[i] = 0;
+ }
+
+ for (i = 0; i < ap_threads_limit; ++i) {
+ status = (ap_scoreboard_image->servers[0][i]).status;
+ status_array[status]++;
+ }
+
+ for (i=0;i<SERVER_NUM_STATUS;i++) {
+ switch(i)
+ {
+ case SERVER_DEAD:
+ printf ("Available:\t%d\n", status_array[i]);
+ break;
+ case SERVER_STARTING:
+ printf ("Starting:\t%d\n", status_array[i]);
+ break;
+ case SERVER_READY:
+ printf ("Ready:\t\t%d\n", status_array[i]);
+ break;
+ case SERVER_BUSY_READ:
+ printf ("Busy:\t\t%d\n", status_array[i]);
+ break;
+ case SERVER_BUSY_WRITE:
+ printf ("Busy Write:\t%d\n", status_array[i]);
+ break;
+ case SERVER_BUSY_KEEPALIVE:
+ printf ("Busy Keepalive:\t%d\n", status_array[i]);
+ break;
+ case SERVER_BUSY_LOG:
+ printf ("Busy Log:\t%d\n", status_array[i]);
+ break;
+ case SERVER_BUSY_DNS:
+ printf ("Busy DNS:\t%d\n", status_array[i]);
+ break;
+ case SERVER_CLOSING:
+ printf ("Closing:\t%d\n", status_array[i]);
+ break;
+ case SERVER_GRACEFUL:
+ printf ("Restart:\t%d\n", status_array[i]);
+ break;
+ case SERVER_IDLE_KILL:
+ printf ("Idle Kill:\t%d\n", status_array[i]);
+ break;
+ default:
+ printf ("Unknown Status:\t%d\n", status_array[i]);
+ break;
+ }
+ if (i != SERVER_DEAD)
+ total+=status_array[i];
+ }
+ printf ("Total Running:\t%d\tout of: \t%d\n", total, ap_threads_limit);
+ printf ("Requests per interval:\t%d\n", reqs);
+
+#ifdef DBINFO_ON
+ printf ("Would blocks:\t%d\n", wblock);
+ printf ("Successful retries:\t%d\n", retry_success);
+ printf ("Failed retries:\t%d\n", retry_fail);
+ printf ("Avg retries:\t%d\n", retry_success == 0 ? 0 : avg_retries / retry_success);
+#endif
+}
+
+static void show_server_data()
+{
+ ap_listen_rec *lr;
+ module **m;
+
+ printf("%s\n", ap_get_server_description());
+ if (ap_my_addrspace && (ap_my_addrspace[0] != 'O') && (ap_my_addrspace[1] != 'S'))
+ printf(" Running in address space %s\n", ap_my_addrspace);
+
+
+ /* Display listening ports */
+ printf(" Listening on port(s):");
+ lr = ap_listeners;
+ do {
+ printf(" %d", lr->bind_addr->port);
+ lr = lr->next;
+ } while (lr && lr != ap_listeners);
+
+ /* Display dynamic modules loaded */
+ printf("\n");
+ for (m = ap_loaded_modules; *m != NULL; m++) {
+ if (((module*)*m)->dynamic_load_handle) {
+ printf(" Loaded dynamic module %s\n", ((module*)*m)->name);
+ }
+ }
+}
+
+
+static int setup_listeners(server_rec *s)
+{
+ ap_listen_rec *lr;
+ int sockdes;
+
+ if (ap_setup_listeners(s) < 1 ) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, 0, s, APLOGNO(00222)
+ "no listening sockets available, shutting down");
+ return -1;
+ }
+
+ listenmaxfd = -1;
+ FD_ZERO(&listenfds);
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ apr_os_sock_get(&sockdes, lr->sd);
+ FD_SET(sockdes, &listenfds);
+ if (sockdes > listenmaxfd) {
+ listenmaxfd = sockdes;
+ }
+ }
+ return 0;
+}
+
+static int shutdown_listeners()
+{
+ ap_listen_rec *lr;
+
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ apr_socket_close(lr->sd);
+ }
+ ap_listeners = NULL;
+ return 0;
+}
+
+/*****************************************************************
+ * Executive routines.
+ */
+
+static int netware_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
+{
+ apr_status_t status=0;
+
+ pconf = _pconf;
+ ap_server_conf = s;
+
+ if (setup_listeners(s)) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, status, s, APLOGNO(00223)
+ "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ restart_pending = shutdown_pending = 0;
+ worker_thread_count = 0;
+
+ if (!is_graceful) {
+ if (ap_run_pre_mpm(s->process->pool, SB_NOT_SHARED) != OK) {
+ return !OK;
+ }
+ }
+
+ /* Only set slot 0 since that is all NetWare will ever have. */
+ ap_scoreboard_image->parent[0].pid = getpid();
+ ap_scoreboard_image->parent[0].generation = ap_my_generation;
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[0].pid,
+ ap_my_generation,
+ 0,
+ MPM_CHILD_STARTED);
+
+ set_signals();
+
+ apr_pool_create(&pmain, pconf);
+ apr_pool_tag(pmain, "pmain");
+ ap_run_child_init(pmain, ap_server_conf);
+
+ if (ap_threads_max_free < ap_threads_min_free + 1) /* Don't thrash... */
+ ap_threads_max_free = ap_threads_min_free + 1;
+ request_count = 0;
+
+ startup_workers(ap_threads_to_start);
+
+ /* Allow the Apache screen to be closed normally on exit() only if it
+ has not been explicitly forced to close on exit(). (ie. the -E flag
+ was specified at startup) */
+ if (hold_screen_on_exit > 0) {
+ hold_screen_on_exit = 0;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00224)
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00225)
+ "Server built: %s", ap_get_server_built());
+ ap_log_command_line(plog, s);
+ ap_log_mpm_common(s);
+ show_server_data();
+
+ mpm_state = AP_MPMQ_RUNNING;
+ while (!restart_pending && !shutdown_pending) {
+ perform_idle_server_maintenance(pconf);
+ if (show_settings)
+ display_settings();
+ apr_thread_yield();
+ apr_sleep(SCOREBOARD_MAINTENANCE_INTERVAL);
+ }
+ mpm_state = AP_MPMQ_STOPPING;
+
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[0].pid,
+ ap_my_generation,
+ 0,
+ MPM_CHILD_EXITED);
+
+ /* Shutdown the listen sockets so that we don't get stuck in a blocking call.
+ shutdown_listeners();*/
+
+ if (shutdown_pending) { /* Got an unload from the console */
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00226)
+ "caught SIGTERM, shutting down");
+
+ while (worker_thread_count > 0) {
+ printf ("\rShutdown pending. Waiting for %lu thread(s) to terminate...",
+ worker_thread_count);
+ apr_thread_yield();
+ }
+
+ mpm_main_cleanup();
+ return DONE;
+ }
+ else { /* the only other way out is a restart */
+ /* advance to the next generation */
+ /* XXX: we really need to make sure this new generation number isn't in
+ * use by any of the children.
+ */
+ ++ap_my_generation;
+ ap_scoreboard_image->global->running_generation = ap_my_generation;
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00227)
+ "Graceful restart requested, doing restart");
+
+ /* Wait for all of the threads to terminate before initiating the restart */
+ while (worker_thread_count > 0) {
+ printf ("\rRestart pending. Waiting for %lu thread(s) to terminate...",
+ worker_thread_count);
+ apr_thread_yield();
+ }
+ printf ("\nRestarting...\n");
+ }
+
+ mpm_main_cleanup();
+ return OK;
+}
+
+static int netware_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+ char *addrname = NULL;
+
+ mpm_state = AP_MPMQ_STARTING;
+
+ is_graceful = 0;
+ ap_my_pid = getpid();
+ addrname = getaddressspacename (NULL, NULL);
+ if (addrname) {
+ ap_my_addrspace = apr_pstrdup (p, addrname);
+ free (addrname);
+ }
+
+#ifndef USE_WINSOCK
+ /* The following call has been moved to the mod_nw_ssl pre-config handler */
+ ap_listen_pre_config();
+#endif
+
+ ap_threads_to_start = DEFAULT_START_THREADS;
+ ap_threads_min_free = DEFAULT_MIN_FREE_THREADS;
+ ap_threads_max_free = DEFAULT_MAX_FREE_THREADS;
+ ap_threads_limit = HARD_THREAD_LIMIT;
+ ap_extended_status = 0;
+
+ /* override core's default thread stacksize */
+ ap_thread_stacksize = DEFAULT_THREAD_STACKSIZE;
+
+ return OK;
+}
+
+static int netware_check_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ static int restart_num = 0;
+ int startup = 0;
+
+ /* we want this only the first time around */
+ if (restart_num++ == 0) {
+ startup = 1;
+ }
+
+ if (ap_threads_limit > HARD_THREAD_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00228)
+ "WARNING: MaxThreads of %d exceeds compile-time "
+ "limit of %d threads, decreasing to %d. "
+ "To increase, please see the HARD_THREAD_LIMIT "
+ "define in server/mpm/netware%s.",
+ ap_threads_limit, HARD_THREAD_LIMIT, HARD_THREAD_LIMIT,
+ MPM_HARD_LIMITS_FILE);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00229)
+ "MaxThreads of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ ap_threads_limit, HARD_THREAD_LIMIT);
+ }
+ ap_threads_limit = HARD_THREAD_LIMIT;
+ }
+ else if (ap_threads_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00230)
+ "WARNING: MaxThreads of %d not allowed, "
+ "increasing to 1.", ap_threads_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(02661)
+ "MaxThreads of %d not allowed, increasing to 1",
+ ap_threads_limit);
+ }
+ ap_threads_limit = 1;
+ }
+
+ /* ap_threads_to_start > ap_threads_limit effectively checked in
+ * call to startup_workers(ap_threads_to_start) in ap_mpm_run()
+ */
+ if (ap_threads_to_start < 0) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00231)
+ "WARNING: StartThreads of %d not allowed, "
+ "increasing to 1.", ap_threads_to_start);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00232)
+ "StartThreads of %d not allowed, increasing to 1",
+ ap_threads_to_start);
+ }
+ ap_threads_to_start = 1;
+ }
+
+ if (ap_threads_min_free < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00233)
+ "WARNING: MinSpareThreads of %d not allowed, "
+ "increasing to 1 to avoid almost certain server failure. "
+ "Please read the documentation.", ap_threads_min_free);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00234)
+ "MinSpareThreads of %d not allowed, increasing to 1",
+ ap_threads_min_free);
+ }
+ ap_threads_min_free = 1;
+ }
+
+ /* ap_threads_max_free < ap_threads_min_free + 1 checked in ap_mpm_run() */
+
+ return OK;
+}
+
+static void netware_mpm_hooks(apr_pool_t *p)
+{
+ /* Run the pre-config hook after core's so that it can override the
+ * default setting of ThreadStackSize for NetWare.
+ */
+ static const char * const predecessors[] = {"core.c", NULL};
+
+ ap_hook_pre_config(netware_pre_config, predecessors, NULL, APR_HOOK_MIDDLE);
+ ap_hook_check_config(netware_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ //ap_hook_post_config(netware_post_config, NULL, NULL, 0);
+ //ap_hook_child_init(netware_child_init, NULL, NULL, APR_HOOK_MIDDLE);
+ //ap_hook_open_logs(netware_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
+ ap_hook_mpm(netware_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(netware_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(netware_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+static void netware_rewrite_args(process_rec *process)
+{
+ char *def_server_root;
+ char optbuf[3];
+ const char *opt_arg;
+ apr_getopt_t *opt;
+ apr_array_header_t *mpm_new_argv;
+
+
+ atexit (mpm_term);
+ InstallConsoleHandler();
+
+ /* Make sure to hold the Apache screen open if exit() is called */
+ hold_screen_on_exit = 1;
+
+ /* Rewrite process->argv[];
+ *
+ * add default -d serverroot from the path of this executable
+ *
+ * The end result will look like:
+ * The -d serverroot default from the running executable
+ */
+ if (process->argc > 0) {
+ char *s = apr_pstrdup (process->pconf, process->argv[0]);
+ if (s) {
+ int i, len = strlen(s);
+
+ for (i=len; i; i--) {
+ if (s[i] == '\\' || s[i] == '/') {
+ s[i] = '\0';
+ apr_filepath_merge(&def_server_root, NULL, s,
+ APR_FILEPATH_TRUENAME, process->pool);
+ break;
+ }
+ }
+ /* Use process->pool so that the rewritten argv
+ * lasts for the lifetime of the server process,
+ * because pconf will be destroyed after the
+ * initial pre-flight of the config parser.
+ */
+ mpm_new_argv = apr_array_make(process->pool, process->argc + 2,
+ sizeof(const char *));
+ *(const char **)apr_array_push(mpm_new_argv) = process->argv[0];
+ *(const char **)apr_array_push(mpm_new_argv) = "-d";
+ *(const char **)apr_array_push(mpm_new_argv) = def_server_root;
+
+ optbuf[0] = '-';
+ optbuf[2] = '\0';
+ apr_getopt_init(&opt, process->pool, process->argc, process->argv);
+ while (apr_getopt(opt, AP_SERVER_BASEARGS"n:", optbuf + 1, &opt_arg) == APR_SUCCESS) {
+ switch (optbuf[1]) {
+ case 'n':
+ if (opt_arg) {
+ renamescreen(opt_arg);
+ }
+ break;
+ case 'E':
+ /* Don't need to hold the screen open if the output is going to a file */
+ hold_screen_on_exit = -1;
+ default:
+ *(const char **)apr_array_push(mpm_new_argv) =
+ apr_pstrdup(process->pool, optbuf);
+
+ if (opt_arg) {
+ *(const char **)apr_array_push(mpm_new_argv) = opt_arg;
+ }
+ break;
+ }
+ }
+ process->argc = mpm_new_argv->nelts;
+ process->argv = (const char * const *) mpm_new_argv->elts;
+ }
+ }
+}
+
+static int CommandLineInterpreter(scr_t screenID, const char *commandLine)
+{
+ char *szCommand = "APACHE2 ";
+ int iCommandLen = 8;
+ char szcommandLine[256];
+ char *pID;
+ screenID = screenID;
+
+
+ if (commandLine == NULL)
+ return NOTMYCOMMAND;
+ if (strlen(commandLine) <= strlen(szCommand))
+ return NOTMYCOMMAND;
+
+ apr_cpystrn(szcommandLine, commandLine, sizeof(szcommandLine));
+
+ /* All added commands begin with "APACHE2 " */
+
+ if (!strnicmp(szCommand, szcommandLine, iCommandLen)) {
+ ActivateScreen (getscreenhandle());
+
+ /* If an instance id was not given but the nlm is loaded in
+ protected space, then the command belongs to the
+ OS address space instance to pass it on. */
+ pID = strstr (szcommandLine, "-p");
+ if ((pID == NULL) && nlmisloadedprotected())
+ return NOTMYCOMMAND;
+
+ /* If we got an instance id but it doesn't match this
+ instance of the nlm, pass it on. */
+ if (pID) {
+ pID = &pID[2];
+ while (*pID && (*pID == ' '))
+ pID++;
+ }
+ if (pID && ap_my_addrspace && strnicmp(pID, ap_my_addrspace, strlen(ap_my_addrspace)))
+ return NOTMYCOMMAND;
+
+ /* If we have determined that this command belongs to this
+ instance of the nlm, then handle it. */
+ if (!strnicmp("RESTART",&szcommandLine[iCommandLen],3)) {
+ printf("Restart Requested...\n");
+ restart();
+ }
+ else if (!strnicmp("VERSION",&szcommandLine[iCommandLen],3)) {
+ printf("Server version: %s\n", ap_get_server_description());
+ printf("Server built: %s\n", ap_get_server_built());
+ }
+ else if (!strnicmp("MODULES",&szcommandLine[iCommandLen],3)) {
+ ap_show_modules();
+ }
+ else if (!strnicmp("DIRECTIVES",&szcommandLine[iCommandLen],3)) {
+ ap_show_directives();
+ }
+ else if (!strnicmp("SHUTDOWN",&szcommandLine[iCommandLen],3)) {
+ printf("Shutdown Requested...\n");
+ shutdown_pending = 1;
+ }
+ else if (!strnicmp("SETTINGS",&szcommandLine[iCommandLen],3)) {
+ if (show_settings) {
+ show_settings = 0;
+ ClearScreen (getscreenhandle());
+ show_server_data();
+ }
+ else {
+ show_settings = 1;
+ display_settings();
+ }
+ }
+ else {
+ show_settings = 0;
+ if (strnicmp("HELP",&szcommandLine[iCommandLen],3))
+ printf("Unknown APACHE2 command %s\n", &szcommandLine[iCommandLen]);
+ printf("Usage: APACHE2 [command] [-p <instance ID>]\n");
+ printf("Commands:\n");
+ printf("\tDIRECTIVES - Show directives\n");
+ printf("\tHELP - Display this help information\n");
+ printf("\tMODULES - Show a list of the loaded modules\n");
+ printf("\tRESTART - Reread the configuration file and restart Apache\n");
+ printf("\tSETTINGS - Show current thread status\n");
+ printf("\tSHUTDOWN - Shutdown Apache\n");
+ printf("\tVERSION - Display the server version information\n");
+ }
+
+ /* Tell NetWare we handled the command */
+ return HANDLEDCOMMAND;
+ }
+
+ /* Tell NetWare that the command isn't mine */
+ return NOTMYCOMMAND;
+}
+
+static int InstallConsoleHandler(void)
+{
+ /* Our command line handler interfaces the system operator
+ with this NLM */
+
+ NX_WRAP_INTERFACE(CommandLineInterpreter, 2, (void*)&(ConsoleHandler.parser));
+
+ ConsoleHandler.rTag = AllocateResourceTag(getnlmhandle(), "Command Line Processor",
+ ConsoleCommandSignature);
+ if (!ConsoleHandler.rTag)
+ {
+ printf("Error on allocate resource tag\n");
+ return 1;
+ }
+
+ RegisterConsoleCommand(&ConsoleHandler);
+
+ /* The Remove procedure unregisters the console handler */
+
+ return 0;
+}
+
+static void RemoveConsoleHandler(void)
+{
+ UnRegisterConsoleCommand(&ConsoleHandler);
+ NX_UNWRAP_INTERFACE(ConsoleHandler.parser);
+}
+
+static const char *set_threads_to_start(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_to_start = atoi(arg);
+ return NULL;
+}
+
+static const char *set_min_free_threads(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_min_free = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_free_threads(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_max_free = atoi(arg);
+ return NULL;
+}
+
+static const char *set_thread_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_limit = atoi(arg);
+ return NULL;
+}
+
+static const command_rec netware_mpm_cmds[] = {
+LISTEN_COMMANDS,
+AP_INIT_TAKE1("StartThreads", set_threads_to_start, NULL, RSRC_CONF,
+ "Number of worker threads launched at server startup"),
+AP_INIT_TAKE1("MinSpareThreads", set_min_free_threads, NULL, RSRC_CONF,
+ "Minimum number of idle threads, to handle request spikes"),
+AP_INIT_TAKE1("MaxSpareThreads", set_max_free_threads, NULL, RSRC_CONF,
+ "Maximum number of idle threads"),
+AP_INIT_TAKE1("MaxThreads", set_thread_limit, NULL, RSRC_CONF,
+ "Maximum number of worker threads alive at the same time"),
+{ NULL }
+};
+
+AP_DECLARE_MODULE(mpm_netware) = {
+ MPM20_MODULE_STUFF,
+ netware_rewrite_args, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ netware_mpm_cmds, /* command apr_table_t */
+ netware_mpm_hooks, /* register hooks */
+};
diff --git a/server/mpm/prefork/Makefile.in b/server/mpm/prefork/Makefile.in
new file mode 100644
index 0000000..f34af9c
--- /dev/null
+++ b/server/mpm/prefork/Makefile.in
@@ -0,0 +1 @@
+include $(top_srcdir)/build/special.mk
diff --git a/server/mpm/prefork/config.m4 b/server/mpm/prefork/config.m4
new file mode 100644
index 0000000..296f834
--- /dev/null
+++ b/server/mpm/prefork/config.m4
@@ -0,0 +1,7 @@
+AC_MSG_CHECKING(if prefork MPM supports this platform)
+if test $forking_mpms_supported != yes; then
+ AC_MSG_RESULT(no - This is not a forking platform)
+else
+ AC_MSG_RESULT(yes)
+ APACHE_MPM_SUPPORTED(prefork, yes, no)
+fi
diff --git a/server/mpm/prefork/config3.m4 b/server/mpm/prefork/config3.m4
new file mode 100644
index 0000000..25fd8df
--- /dev/null
+++ b/server/mpm/prefork/config3.m4
@@ -0,0 +1 @@
+APACHE_MPM_MODULE(prefork, $enable_mpm_prefork)
diff --git a/server/mpm/prefork/mpm_default.h b/server/mpm/prefork/mpm_default.h
new file mode 100644
index 0000000..55b038b
--- /dev/null
+++ b/server/mpm/prefork/mpm_default.h
@@ -0,0 +1,51 @@
+/* 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 prefork/mpm_default.h
+ * @brief Prefork MPM defaults
+ *
+ * @defgroup APACHE_MPM_PREFORK Prefork MPM
+ * @ingroup APACHE_INTERNAL
+ * @{
+ */
+
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Number of servers to spawn off by default --- also, if fewer than
+ * this free when the caretaker checks, it will spawn more.
+ */
+#ifndef DEFAULT_START_DAEMON
+#define DEFAULT_START_DAEMON 5
+#endif
+
+/* Maximum number of *free* server processes --- more than this, and
+ * they will die off.
+ */
+
+#ifndef DEFAULT_MAX_FREE_DAEMON
+#define DEFAULT_MAX_FREE_DAEMON 10
+#endif
+
+/* Minimum --- fewer than this, and more will be created */
+
+#ifndef DEFAULT_MIN_FREE_DAEMON
+#define DEFAULT_MIN_FREE_DAEMON 5
+#endif
+
+#endif /* AP_MPM_DEFAULT_H */
+/** @} */
diff --git a/server/mpm/prefork/prefork.c b/server/mpm/prefork/prefork.c
new file mode 100644
index 0000000..b5adb57
--- /dev/null
+++ b/server/mpm/prefork/prefork.c
@@ -0,0 +1,1563 @@
+/* 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.
+ */
+
+#include "apr.h"
+#include "apr_portable.h"
+#include "apr_strings.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+
+#define APR_WANT_STDIO
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "mpm_default.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "scoreboard.h"
+#include "ap_mpm.h"
+#include "util_mutex.h"
+#include "unixd.h"
+#include "mpm_common.h"
+#include "ap_listen.h"
+#include "ap_mmn.h"
+#include "apr_poll.h"
+
+#include <stdlib.h>
+
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#ifdef HAVE_SYS_PROCESSOR_H
+#include <sys/processor.h> /* for bindprocessor() */
+#endif
+
+#include <signal.h>
+#include <sys/times.h>
+
+/* Limit on the total --- clients will be locked out if more servers than
+ * this are needed. It is intended solely to keep the server from crashing
+ * when things get out of hand.
+ *
+ * We keep a hard maximum number of servers, for two reasons --- first off,
+ * in case something goes seriously wrong, we want to stop the fork bomb
+ * short of actually crashing the machine we're running on by filling some
+ * kernel table. Secondly, it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_SERVER_LIMIT
+#define DEFAULT_SERVER_LIMIT 256
+#endif
+
+/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_SERVER_LIMIT
+#define MAX_SERVER_LIMIT 200000
+#endif
+
+#ifndef HARD_THREAD_LIMIT
+#define HARD_THREAD_LIMIT 1
+#endif
+
+/* config globals */
+
+static int ap_daemons_to_start=0;
+static int ap_daemons_min_free=0;
+static int ap_daemons_max_free=0;
+static int ap_daemons_limit=0; /* MaxRequestWorkers */
+static int server_limit = 0;
+
+/* data retained by prefork across load/unload of the module
+ * allocated on first call to pre-config hook; located on
+ * subsequent calls to pre-config hook
+ */
+typedef struct prefork_retained_data {
+ ap_unixd_mpm_retained_data *mpm;
+
+ int first_server_limit;
+ int maxclients_reported;
+ /*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxRequestWorkers changes across AP_SIG_GRACEFUL restarts. We
+ * use this value to optimize routines that have to scan the entire scoreboard.
+ */
+ int max_daemons_limit;
+ /*
+ * idle_spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers. It is
+ * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
+ * without the need to spawn.
+ */
+ int idle_spawn_rate;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (32)
+#endif
+ int hold_off_on_exponential_spawning;
+} prefork_retained_data;
+static prefork_retained_data *retained;
+
+typedef struct prefork_child_bucket {
+ ap_pod_t *pod;
+ ap_listen_rec *listeners;
+ apr_proc_mutex_t *mutex;
+} prefork_child_bucket;
+static prefork_child_bucket *all_buckets, /* All listeners buckets */
+ *my_bucket; /* Current child bucket */
+
+#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
+
+/* one_process --- debugging mode variable; can be set from the command line
+ * with the -X flag. If set, this gets you the child_main loop running
+ * in the process which originally started up (no detach, no make_child),
+ * which is a pretty nice debugging environment. (You'll get a SIGHUP
+ * early in standalone_main; just continue through. This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+static apr_pool_t *pconf; /* Pool for config stuff */
+static apr_pool_t *pchild; /* Pool for httpd child stuff */
+
+static pid_t ap_my_pid; /* it seems silly to call getpid all the time */
+static pid_t parent_pid;
+static int my_child_num;
+
+#ifdef GPROF
+/*
+ * change directory for gprof to plop the gmon.out file
+ * configure in httpd.conf:
+ * GprofDir $RuntimeDir/ -> $ServerRoot/$RuntimeDir/gmon.out
+ * GprofDir $RuntimeDir/% -> $ServerRoot/$RuntimeDir/gprof.$pid/gmon.out
+ */
+static void chdir_for_gprof(void)
+{
+ core_server_config *sconf =
+ ap_get_core_module_config(ap_server_conf->module_config);
+ char *dir = sconf->gprof_dir;
+ const char *use_dir;
+
+ if(dir) {
+ apr_status_t res;
+ char *buf = NULL ;
+ int len = strlen(sconf->gprof_dir) - 1;
+ if(*(dir + len) == '%') {
+ dir[len] = '\0';
+ buf = ap_append_pid(pconf, dir, "gprof.");
+ }
+ use_dir = ap_server_root_relative(pconf, buf ? buf : dir);
+ res = apr_dir_make(use_dir,
+ APR_UREAD | APR_UWRITE | APR_UEXECUTE |
+ APR_GREAD | APR_GEXECUTE |
+ APR_WREAD | APR_WEXECUTE, pconf);
+ if(res != APR_SUCCESS && !APR_STATUS_IS_EEXIST(res)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, res, ap_server_conf, APLOGNO(00142)
+ "gprof: error creating directory %s", dir);
+ }
+ }
+ else {
+ use_dir = ap_runtime_dir_relative(pconf, "");
+ }
+
+ chdir(use_dir);
+}
+#else
+#define chdir_for_gprof()
+#endif
+
+static void prefork_note_child_killed(int childnum, pid_t pid,
+ ap_generation_t gen)
+{
+ AP_DEBUG_ASSERT(childnum != -1); /* no scoreboard squatting with this MPM */
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[childnum].pid,
+ ap_scoreboard_image->parent[childnum].generation,
+ childnum, MPM_CHILD_EXITED);
+ ap_scoreboard_image->parent[childnum].pid = 0;
+}
+
+static void prefork_note_child_started(int slot, pid_t pid)
+{
+ ap_generation_t gen = retained->mpm->my_generation;
+ ap_scoreboard_image->parent[slot].pid = pid;
+ ap_scoreboard_image->parent[slot].generation = gen;
+ ap_run_child_status(ap_server_conf, pid, gen, slot, MPM_CHILD_STARTED);
+}
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code) __attribute__ ((noreturn));
+static void clean_child_exit(int code)
+{
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+
+ apr_signal(SIGHUP, SIG_IGN);
+ apr_signal(SIGTERM, SIG_IGN);
+
+ if (code == 0) {
+ ap_run_child_stopping(pchild, 0);
+ }
+
+ if (pchild) {
+ apr_pool_destroy(pchild);
+ }
+
+ if (one_process) {
+ prefork_note_child_killed(/* slot */ 0, 0, 0);
+ }
+
+ ap_mpm_pod_close(my_bucket->pod);
+ chdir_for_gprof();
+ exit(code);
+}
+
+static apr_status_t accept_mutex_on(void)
+{
+ apr_status_t rv = apr_proc_mutex_lock(my_bucket->mutex);
+ if (rv != APR_SUCCESS) {
+ const char *msg = "couldn't grab the accept mutex";
+
+ if (retained->mpm->my_generation !=
+ ap_scoreboard_image->global->running_generation) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(00143) "%s", msg);
+ clean_child_exit(0);
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(00144) "%s", msg);
+ exit(APEXIT_CHILDFATAL);
+ }
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t accept_mutex_off(void)
+{
+ apr_status_t rv = apr_proc_mutex_unlock(my_bucket->mutex);
+ if (rv != APR_SUCCESS) {
+ const char *msg = "couldn't release the accept mutex";
+
+ if (retained->mpm->my_generation !=
+ ap_scoreboard_image->global->running_generation) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(00145) "%s", msg);
+ /* don't exit here... we have a connection to
+ * process, after which point we'll see that the
+ * generation changed and we'll exit cleanly
+ */
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(00146) "%s", msg);
+ exit(APEXIT_CHILDFATAL);
+ }
+ }
+ return APR_SUCCESS;
+}
+
+/* On some architectures it's safe to do unserialized accept()s in the single
+ * Listen case. But it's never safe to do it in the case where there's
+ * multiple Listen statements. Define SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+ * when it's safe in the single Listen case.
+ */
+#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+#define SAFE_ACCEPT(stmt) (ap_listeners->next ? (stmt) : APR_SUCCESS)
+#else
+#define SAFE_ACCEPT(stmt) (stmt)
+#endif
+
+static int prefork_query(int query_code, int *result, apr_status_t *rv)
+{
+ *rv = APR_SUCCESS;
+ switch(query_code){
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = ap_daemons_limit;
+ break;
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_NOT_SUPPORTED;
+ break;
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_DYNAMIC;
+ break;
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = server_limit;
+ break;
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = HARD_THREAD_LIMIT;
+ break;
+ case AP_MPMQ_MAX_THREADS:
+ *result = 1;
+ break;
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = ap_daemons_min_free;
+ break;
+ case AP_MPMQ_MIN_SPARE_THREADS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = ap_daemons_max_free;
+ break;
+ case AP_MPMQ_MAX_SPARE_THREADS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = ap_max_requests_per_child;
+ break;
+ case AP_MPMQ_MAX_DAEMONS:
+ *result = ap_daemons_limit;
+ break;
+ case AP_MPMQ_MPM_STATE:
+ *result = retained->mpm->mpm_state;
+ break;
+ case AP_MPMQ_GENERATION:
+ *result = retained->mpm->my_generation;
+ break;
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+ return OK;
+}
+
+static const char *prefork_get_name(void)
+{
+ return "prefork";
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static void just_die(int sig)
+{
+ clean_child_exit(0);
+}
+
+/* volatile because it's updated from a signal handler */
+static int volatile die_now = 0;
+
+static void stop_listening(int sig)
+{
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ ap_close_listeners_ex(my_bucket->listeners);
+
+ /* For a graceful stop, we want the child to exit when done */
+ die_now = 1;
+}
+
+/*****************************************************************
+ * Child process main loop.
+ * The following vars are static to avoid getting clobbered by longjmp();
+ * they are really private to child_main.
+ */
+
+static int requests_this_child;
+static int num_listensocks = 0;
+
+#if APR_HAS_THREADS
+static void child_sigmask(sigset_t *new_mask, sigset_t *old_mask)
+{
+#if defined(SIGPROCMASK_SETS_THREAD_MASK)
+ sigprocmask(SIG_SETMASK, new_mask, old_mask);
+#else
+ pthread_sigmask(SIG_SETMASK, new_mask, old_mask);
+#endif
+}
+#endif
+
+static void child_main(int child_num_arg, int child_bucket)
+{
+#if APR_HAS_THREADS
+ apr_thread_t *thd = NULL;
+ sigset_t sig_mask;
+#endif
+ apr_pool_t *ptrans;
+ apr_allocator_t *allocator;
+ apr_status_t status;
+ int i;
+ ap_listen_rec *lr;
+ apr_pollset_t *pollset;
+ ap_sb_handle_t *sbh;
+ apr_bucket_alloc_t *bucket_alloc;
+ int last_poll_idx = 0;
+ const char *lockfile;
+
+ /* for benefit of any hooks that run as this child initializes */
+ retained->mpm->mpm_state = AP_MPMQ_STARTING;
+
+ my_child_num = child_num_arg;
+ ap_my_pid = getpid();
+ requests_this_child = 0;
+
+ ap_fatal_signal_child_setup(ap_server_conf);
+
+ /* Get a sub context for global allocations in this child, so that
+ * we can have cleanups occur when the child exits.
+ */
+ apr_allocator_create(&allocator);
+ apr_allocator_max_free_set(allocator, ap_max_mem_free);
+ apr_pool_create_ex(&pchild, pconf, NULL, allocator);
+ apr_allocator_owner_set(allocator, pchild);
+ apr_pool_tag(pchild, "pchild");
+
+#if AP_HAS_THREAD_LOCAL
+ if (one_process) {
+ thd = ap_thread_current();
+ }
+ else if ((status = ap_thread_main_create(&thd, pchild))) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(10378)
+ "Couldn't initialize child main thread");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+#elif APR_HAS_THREADS
+ {
+ apr_os_thread_t osthd = apr_os_thread_current();
+ apr_os_thread_put(&thd, &osthd, pchild);
+ }
+#endif
+#if APR_HAS_THREADS
+ ap_assert(thd != NULL);
+#endif
+
+ apr_pool_create(&ptrans, pchild);
+ apr_pool_tag(ptrans, "transaction");
+
+ /* close unused listeners and pods */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ if (i != child_bucket) {
+ ap_close_listeners_ex(all_buckets[i].listeners);
+ ap_mpm_pod_close(all_buckets[i].pod);
+ }
+ }
+
+ /* needs to be done before we switch UIDs so we have permissions */
+ ap_reopen_scoreboard(pchild, NULL, 0);
+ status = SAFE_ACCEPT(apr_proc_mutex_child_init(&my_bucket->mutex,
+ apr_proc_mutex_lockfile(my_bucket->mutex),
+ pchild));
+ if (status != APR_SUCCESS) {
+ lockfile = apr_proc_mutex_lockfile(my_bucket->mutex);
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(00155)
+ "Couldn't initialize cross-process lock in child "
+ "(%s) (%s)",
+ lockfile ? lockfile : "none",
+ apr_proc_mutex_name(my_bucket->mutex));
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ if (ap_run_drop_privileges(pchild, ap_server_conf)) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+#if APR_HAS_THREADS
+ /* Save the signal mask and block all the signals from being received by
+ * threads potentially created in child_init() hooks (e.g. mod_watchdog).
+ */
+ child_sigmask(NULL, &sig_mask);
+ {
+ apr_status_t rv;
+ rv = apr_setup_signal_thread();
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(10271)
+ "Couldn't initialize signal thread");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ }
+#endif /* APR_HAS_THREADS */
+
+ ap_run_child_init(pchild, ap_server_conf);
+
+#if APR_HAS_THREADS
+ /* Restore the original signal mask for this main thread, the only one
+ * that should possibly get interrupted by signals.
+ */
+ child_sigmask(&sig_mask, NULL);
+#endif
+
+ ap_create_sb_handle(&sbh, pchild, my_child_num, 0);
+
+ (void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
+
+ /* Set up the pollfd array */
+ status = apr_pollset_create(&pollset, num_listensocks, pchild,
+ APR_POLLSET_NOCOPY);
+ if (status != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(00156)
+ "Couldn't create pollset in child; check system or user limits");
+ clean_child_exit(APEXIT_CHILDSICK); /* assume temporary resource issue */
+ }
+
+ for (lr = my_bucket->listeners, i = num_listensocks; i--; lr = lr->next) {
+ apr_pollfd_t *pfd = apr_pcalloc(pchild, sizeof *pfd);
+
+ pfd->desc_type = APR_POLL_SOCKET;
+ pfd->desc.s = lr->sd;
+ pfd->reqevents = APR_POLLIN;
+ pfd->client_data = lr;
+
+ status = apr_pollset_add(pollset, pfd);
+ if (status != APR_SUCCESS) {
+ /* If the child processed a SIGWINCH before setting up the
+ * pollset, this error path is expected and harmless,
+ * since the listener fd was already closed; so don't
+ * pollute the logs in that case. */
+ if (!die_now) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO(00157)
+ "Couldn't add listener to pollset; check system or user limits");
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ clean_child_exit(0);
+ }
+
+ lr->accept_func = ap_unixd_accept;
+ }
+
+ retained->mpm->mpm_state = AP_MPMQ_RUNNING;
+
+ bucket_alloc = apr_bucket_alloc_create(pchild);
+
+ /* die_now is set when AP_SIG_GRACEFUL is received in the child;
+ * {shutdown,restart}_pending are set when a signal is received while
+ * running in single process mode.
+ */
+ while (!die_now
+ && !retained->mpm->shutdown_pending
+ && !retained->mpm->restart_pending) {
+ conn_rec *current_conn;
+ void *csd;
+
+ /*
+ * (Re)initialize this child to a pre-connection state.
+ */
+
+ apr_pool_clear(ptrans);
+
+ if ((ap_max_requests_per_child > 0
+ && requests_this_child++ >= ap_max_requests_per_child)) {
+ clean_child_exit(0);
+ }
+
+ (void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
+
+ /*
+ * Wait for an acceptable connection to arrive.
+ */
+
+ /* Lock around "accept", if necessary */
+ SAFE_ACCEPT(accept_mutex_on());
+
+ if (num_listensocks == 1) {
+ /* There is only one listener record, so refer to that one. */
+ lr = my_bucket->listeners;
+ }
+ else {
+ /* multiple listening sockets - need to poll */
+ for (;;) {
+ apr_int32_t numdesc;
+ const apr_pollfd_t *pdesc;
+
+ /* check for termination first so we don't sleep for a while in
+ * poll if already signalled
+ */
+ if (die_now /* in graceful stop/restart */
+ || retained->mpm->shutdown_pending
+ || retained->mpm->restart_pending) {
+ SAFE_ACCEPT(accept_mutex_off());
+ clean_child_exit(0);
+ }
+
+ /* timeout == 10 seconds to avoid a hang at graceful restart/stop
+ * caused by the closing of sockets by the signal handler
+ */
+ status = apr_pollset_poll(pollset, apr_time_from_sec(10),
+ &numdesc, &pdesc);
+ if (status != APR_SUCCESS) {
+ if (APR_STATUS_IS_TIMEUP(status) ||
+ APR_STATUS_IS_EINTR(status)) {
+ continue;
+ }
+ /* Single Unix documents select as returning errnos
+ * EBADF, EINTR, and EINVAL... and in none of those
+ * cases does it make sense to continue. In fact
+ * on Linux 2.0.x we seem to end up with EFAULT
+ * occasionally, and we'd loop forever due to it.
+ */
+ ap_log_error(APLOG_MARK, APLOG_ERR, status,
+ ap_server_conf, APLOGNO(00158) "apr_pollset_poll: (listen)");
+ SAFE_ACCEPT(accept_mutex_off());
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+
+ /* We can always use pdesc[0], but sockets at position N
+ * could end up completely starved of attention in a very
+ * busy server. Therefore, we round-robin across the
+ * returned set of descriptors. While it is possible that
+ * the returned set of descriptors might flip around and
+ * continue to starve some sockets, we happen to know the
+ * internal pollset implementation retains ordering
+ * stability of the sockets. Thus, the round-robin should
+ * ensure that a socket will eventually be serviced.
+ */
+ if (last_poll_idx >= numdesc)
+ last_poll_idx = 0;
+
+ /* Grab a listener record from the client_data of the poll
+ * descriptor, and advance our saved index to round-robin
+ * the next fetch.
+ *
+ * ### hmm... this descriptor might have POLLERR rather
+ * ### than POLLIN
+ */
+ lr = pdesc[last_poll_idx++].client_data;
+ goto got_fd;
+ }
+ }
+ got_fd:
+ /* if we accept() something we don't want to die, so we have to
+ * defer the exit
+ */
+ status = lr->accept_func(&csd, lr, ptrans);
+
+ SAFE_ACCEPT(accept_mutex_off()); /* unlock after "accept" */
+
+ if (status == APR_EGENERAL) {
+ /* resource shortage or should-not-occur occurred */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ else if (status != APR_SUCCESS) {
+ continue;
+ }
+
+ /*
+ * We now have a connection, so set it up with the appropriate
+ * socket options, file descriptors, and read/write buffers.
+ */
+
+ current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd, my_child_num, sbh, bucket_alloc);
+ if (current_conn) {
+#if APR_HAS_THREADS
+ current_conn->current_thread = thd;
+#endif
+ ap_process_connection(current_conn, csd);
+ ap_lingering_close(current_conn);
+ }
+
+ /* Check the pod and the generation number after processing a
+ * connection so that we'll go away if a graceful restart occurred
+ * while we were processing the connection or we are the lucky
+ * idle server process that gets to die.
+ */
+ if (ap_mpm_pod_check(my_bucket->pod) == APR_SUCCESS) { /* selected as idle? */
+ die_now = 1;
+ }
+ else if (retained->mpm->my_generation !=
+ ap_scoreboard_image->global->running_generation) { /* restart? */
+ /* yeah, this could be non-graceful restart, in which case the
+ * parent will kill us soon enough, but why bother checking?
+ */
+ die_now = 1;
+ }
+ }
+ apr_pool_clear(ptrans); /* kludge to avoid crash in APR reslist cleanup code */
+ clean_child_exit(0);
+}
+
+
+static int make_child(server_rec *s, int slot)
+{
+ int bucket = slot % retained->mpm->num_buckets;
+ int pid;
+
+ if (slot + 1 > retained->max_daemons_limit) {
+ retained->max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ my_bucket = &all_buckets[0];
+
+ prefork_note_child_started(slot, getpid());
+ child_main(slot, 0);
+ /* NOTREACHED */
+ ap_assert(0);
+ return -1;
+ }
+
+ (void) ap_update_child_status_from_indexes(slot, 0, SERVER_STARTING,
+ (request_rec *) NULL);
+
+#ifdef _OSD_POSIX
+ /* BS2000 requires a "special" version of fork() before a setuid() call */
+ if ((pid = os_fork(ap_unixd_config.user_name)) == -1) {
+#else
+ if ((pid = fork()) == -1) {
+#endif
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, APLOGNO(00159) "fork: Unable to fork new process");
+
+ /* fork didn't succeed. Fix the scoreboard or else
+ * it will say SERVER_STARTING forever and ever
+ */
+ (void) ap_update_child_status_from_indexes(slot, 0, SERVER_DEAD,
+ (request_rec *) NULL);
+
+ /* In case system resources are maxxed out, we don't want
+ * Apache running away with the CPU trying to fork over and
+ * over and over again.
+ */
+ sleep(10);
+
+ return -1;
+ }
+
+ if (!pid) {
+#if AP_HAS_THREAD_LOCAL
+ ap_thread_current_after_fork();
+#endif
+
+ my_bucket = &all_buckets[bucket];
+
+#ifdef HAVE_BINDPROCESSOR
+ /* by default AIX binds to a single processor
+ * this bit unbinds children which will then bind to another cpu
+ */
+ int status = bindprocessor(BINDPROCESS, (int)getpid(),
+ PROCESSOR_CLASS_ANY);
+ if (status != OK) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, errno,
+ ap_server_conf, APLOGNO(00160) "processor unbind failed");
+ }
+#endif
+ RAISE_SIGSTOP(MAKE_CHILD);
+ AP_MONCONTROL(1);
+ /* Disable the parent's signal handlers and set up proper handling in
+ * the child.
+ */
+ apr_signal(SIGHUP, just_die);
+ apr_signal(SIGTERM, just_die);
+ /* Ignore SIGINT in child. This fixes race-conditions in signals
+ * handling when httpd is running on foreground and user hits ctrl+c.
+ * In this case, SIGINT is sent to all children followed by SIGTERM
+ * from the main process, which interrupts the SIGINT handler and
+ * leads to inconsistency.
+ */
+ apr_signal(SIGINT, SIG_IGN);
+ /* The child process just closes listeners on AP_SIG_GRACEFUL.
+ * The pod is used for signalling the graceful restart.
+ */
+ apr_signal(AP_SIG_GRACEFUL, stop_listening);
+ child_main(slot, bucket);
+ }
+
+ prefork_note_child_started(slot, pid);
+
+ return 0;
+}
+
+
+/* start up a bunch of children */
+static void startup_children(int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
+ if (ap_scoreboard_image->servers[i][0].status != SERVER_DEAD) {
+ continue;
+ }
+ if (make_child(ap_server_conf, i) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+static void perform_idle_server_maintenance(apr_pool_t *p)
+{
+ int i;
+ int idle_count;
+ worker_score *ws;
+ int free_length;
+ int free_slots[MAX_SPAWN_RATE];
+ int last_non_dead;
+ int total_non_dead;
+
+ /* initialize the free_list */
+ free_length = 0;
+
+ idle_count = 0;
+ last_non_dead = -1;
+ total_non_dead = 0;
+
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ int status;
+
+ if (i >= retained->max_daemons_limit && free_length == retained->idle_spawn_rate)
+ break;
+ ws = &ap_scoreboard_image->servers[i][0];
+ status = ws->status;
+ if (status == SERVER_DEAD) {
+ /* try to keep children numbers as low as possible */
+ if (free_length < retained->idle_spawn_rate) {
+ free_slots[free_length] = i;
+ ++free_length;
+ }
+ }
+ else {
+ /* We consider a starting server as idle because we started it
+ * at least a cycle ago, and if it still hasn't finished starting
+ * then we're just going to swamp things worse by forking more.
+ * So we hopefully won't need to fork more if we count it.
+ * This depends on the ordering of SERVER_READY and SERVER_STARTING.
+ */
+ if (status <= SERVER_READY) {
+ ++ idle_count;
+ }
+
+ ++total_non_dead;
+ last_non_dead = i;
+ }
+ }
+ retained->max_daemons_limit = last_non_dead + 1;
+ if (idle_count > ap_daemons_max_free) {
+ static int bucket_kill_child_record = -1;
+ /* kill off one child... we use the pod because that'll cause it to
+ * shut down gracefully, in case it happened to pick up a request
+ * while we were counting
+ */
+ bucket_kill_child_record = (bucket_kill_child_record + 1) % retained->mpm->num_buckets;
+ ap_mpm_pod_signal(all_buckets[bucket_kill_child_record].pod);
+ retained->idle_spawn_rate = 1;
+ }
+ else if (idle_count < ap_daemons_min_free) {
+ /* terminate the free list */
+ if (free_length == 0) {
+ /* only report this condition once */
+ if (!retained->maxclients_reported) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00161)
+ "server reached MaxRequestWorkers setting, consider"
+ " raising the MaxRequestWorkers setting");
+ retained->maxclients_reported = 1;
+ }
+ retained->idle_spawn_rate = 1;
+ }
+ else {
+ if (retained->idle_spawn_rate >= 8) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00162)
+ "server seems busy, (you may need "
+ "to increase StartServers, or Min/MaxSpareServers), "
+ "spawning %d children, there are %d idle, and "
+ "%d total children", retained->idle_spawn_rate,
+ idle_count, total_non_dead);
+ }
+ for (i = 0; i < free_length; ++i) {
+ make_child(ap_server_conf, free_slots[i]);
+ }
+ /* the next time around we want to spawn twice as many if this
+ * wasn't good enough, but not if we've just done a graceful
+ */
+ if (retained->hold_off_on_exponential_spawning) {
+ --retained->hold_off_on_exponential_spawning;
+ }
+ else if (retained->idle_spawn_rate < MAX_SPAWN_RATE) {
+ retained->idle_spawn_rate *= 2;
+ }
+ }
+ }
+ else {
+ retained->idle_spawn_rate = 1;
+ }
+}
+
+/*****************************************************************
+ * Executive routines.
+ */
+
+static int prefork_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
+{
+ int index;
+ int remaining_children_to_start;
+ int i;
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ if (!retained->mpm->was_graceful) {
+ if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ return !OK;
+ }
+ /* fix the generation number in the global score; we just got a new,
+ * cleared scoreboard
+ */
+ ap_scoreboard_image->global->running_generation = retained->mpm->my_generation;
+ }
+
+ ap_unixd_mpm_set_signals(pconf, one_process);
+
+ if (one_process) {
+ AP_MONCONTROL(1);
+ make_child(ap_server_conf, 0);
+ /* NOTREACHED */
+ ap_assert(0);
+ return !OK;
+ }
+
+ /* Don't thrash since num_buckets depends on the
+ * system and the number of online CPU cores...
+ */
+ if (ap_daemons_limit < retained->mpm->num_buckets)
+ ap_daemons_limit = retained->mpm->num_buckets;
+ if (ap_daemons_to_start < retained->mpm->num_buckets)
+ ap_daemons_to_start = retained->mpm->num_buckets;
+ if (ap_daemons_min_free < retained->mpm->num_buckets)
+ ap_daemons_min_free = retained->mpm->num_buckets;
+ if (ap_daemons_max_free < ap_daemons_min_free + retained->mpm->num_buckets)
+ ap_daemons_max_free = ap_daemons_min_free + retained->mpm->num_buckets;
+
+ /* If we're doing a graceful_restart then we're going to see a lot
+ * of children exiting immediately when we get into the main loop
+ * below (because we just sent them AP_SIG_GRACEFUL). This happens pretty
+ * rapidly... and for each one that exits we'll start a new one until
+ * we reach at least daemons_min_free. But we may be permitted to
+ * start more than that, so we'll just keep track of how many we're
+ * supposed to start up without the 1 second penalty between each fork.
+ */
+ remaining_children_to_start = ap_daemons_to_start;
+ if (remaining_children_to_start > ap_daemons_limit) {
+ remaining_children_to_start = ap_daemons_limit;
+ }
+ if (!retained->mpm->was_graceful) {
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ }
+ else {
+ /* give the system some time to recover before kicking into
+ * exponential mode
+ */
+ retained->hold_off_on_exponential_spawning = 10;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00163)
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00164)
+ "Server built: %s", ap_get_server_built());
+ ap_log_command_line(plog, s);
+ ap_log_mpm_common(s);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00165)
+ "Accept mutex: %s (default: %s)",
+ (all_buckets[0].mutex)
+ ? apr_proc_mutex_name(all_buckets[0].mutex)
+ : "none",
+ apr_proc_mutex_defname());
+
+ retained->mpm->mpm_state = AP_MPMQ_RUNNING;
+
+ while (!retained->mpm->restart_pending && !retained->mpm->shutdown_pending) {
+ int child_slot;
+ apr_exit_why_e exitwhy;
+ int status, processed_status;
+ /* this is a memory leak, but I'll fix it later. */
+ apr_proc_t pid;
+
+ ap_wait_or_timeout(&exitwhy, &status, &pid, pconf, ap_server_conf);
+
+ /* XXX: if it takes longer than 1 second for all our children
+ * to start up and get into IDLE state then we may spawn an
+ * extra child
+ */
+ if (pid.pid != -1) {
+ processed_status = ap_process_child_status(&pid, exitwhy, status);
+ child_slot = ap_find_child_by_pid(&pid);
+ if (processed_status == APEXIT_CHILDFATAL) {
+ /* fix race condition found in PR 39311
+ * A child created at the same time as a graceful happens
+ * can find the lock missing and create a fatal error.
+ * It is not fatal for the last generation to be in this state.
+ */
+ if (child_slot < 0
+ || ap_get_scoreboard_process(child_slot)->generation
+ == retained->mpm->my_generation) {
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ return !OK;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(00166)
+ "Ignoring fatal error in child of previous "
+ "generation (pid %ld).",
+ (long)pid.pid);
+ }
+ }
+
+ /* non-fatal death... note that it's gone in the scoreboard. */
+ if (child_slot >= 0) {
+ (void) ap_update_child_status_from_indexes(child_slot, 0, SERVER_DEAD,
+ (request_rec *) NULL);
+ prefork_note_child_killed(child_slot, 0, 0);
+ if (processed_status == APEXIT_CHILDSICK) {
+ /* child detected a resource shortage (E[NM]FILE, ENOBUFS, etc)
+ * cut the fork rate to the minimum
+ */
+ retained->idle_spawn_rate = 1;
+ }
+ else if (remaining_children_to_start
+ && child_slot < ap_daemons_limit) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ make_child(ap_server_conf, child_slot);
+ --remaining_children_to_start;
+ }
+#if APR_HAS_OTHER_CHILD
+ }
+ else if (apr_proc_other_child_alert(&pid, APR_OC_REASON_DEATH, status) == APR_SUCCESS) {
+ /* handled */
+#endif
+ }
+ else if (retained->mpm->was_graceful) {
+ /* Great, we've probably just lost a slot in the
+ * scoreboard. Somehow we don't know about this
+ * child.
+ */
+ ap_log_error(APLOG_MARK, APLOG_WARNING,
+ 0, ap_server_conf, APLOGNO(00167)
+ "long lost child came home! (pid %ld)", (long)pid.pid);
+ }
+ /* Don't perform idle maintenance when a child dies,
+ * only do it when there's a timeout. Remember only a
+ * finite number of children can die, and it's pretty
+ * pathological for a lot to die suddenly.
+ */
+ continue;
+ }
+ else if (remaining_children_to_start) {
+ /* we hit a 1 second timeout in which none of the previous
+ * generation of children needed to be reaped... so assume
+ * they're all done, and pick up the slack if any is left.
+ */
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ /* In any event we really shouldn't do the code below because
+ * few of the servers we just started are in the IDLE state
+ * yet, so we'd mistakenly create an extra server.
+ */
+ continue;
+ }
+
+ perform_idle_server_maintenance(pconf);
+ }
+
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+
+ if (retained->mpm->shutdown_pending && retained->mpm->is_ungraceful) {
+ /* Time to shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ if (ap_unixd_killpg(getpgrp(), SIGTERM) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00168) "killpg SIGTERM");
+ }
+ ap_reclaim_child_processes(1, /* Start with SIGTERM */
+ prefork_note_child_killed);
+
+ /* cleanup pid file on normal shutdown */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00169)
+ "caught SIGTERM, shutting down");
+
+ return DONE;
+ }
+
+ if (retained->mpm->shutdown_pending) {
+ /* Time to perform a graceful shut down:
+ * Reap the inactive children, and ask the active ones
+ * to close their listeners, then wait until they are
+ * all done to exit.
+ */
+ int active_children;
+ apr_time_t cutoff = 0;
+
+ /* Stop listening */
+ ap_close_listeners();
+
+ /* kill off the idle ones */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ ap_mpm_pod_killpg(all_buckets[i].pod, retained->max_daemons_limit);
+ }
+
+ /* Send SIGUSR1 to the active children */
+ active_children = 0;
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
+ /* Ask each child to close its listeners. */
+ ap_mpm_safe_kill(MPM_CHILD_PID(index), AP_SIG_GRACEFUL);
+ active_children++;
+ }
+ }
+
+ /* Allow each child which actually finished to exit */
+ ap_relieve_child_processes(prefork_note_child_killed);
+
+ /* cleanup pid file */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00170)
+ "caught " AP_SIG_GRACEFUL_STOP_STRING ", shutting down gracefully");
+
+ if (ap_graceful_shutdown_timeout) {
+ cutoff = apr_time_now() +
+ apr_time_from_sec(ap_graceful_shutdown_timeout);
+ }
+
+ /* Don't really exit until each child has finished */
+ retained->mpm->shutdown_pending = 0;
+ do {
+ /* Pause for a second */
+ sleep(1);
+
+ /* Relieve any children which have now exited */
+ ap_relieve_child_processes(prefork_note_child_killed);
+
+ active_children = 0;
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_mpm_safe_kill(MPM_CHILD_PID(index), 0) == APR_SUCCESS) {
+ active_children = 1;
+ /* Having just one child is enough to stay around */
+ break;
+ }
+ }
+ } while (!retained->mpm->shutdown_pending && active_children &&
+ (!ap_graceful_shutdown_timeout || apr_time_now() < cutoff));
+
+ /* We might be here because we received SIGTERM, either
+ * way, try and make sure that all of our processes are
+ * really dead.
+ */
+ ap_unixd_killpg(getpgrp(), SIGTERM);
+
+ return DONE;
+ }
+
+ /* we've been told to restart */
+ if (one_process) {
+ /* not worth thinking about */
+ return DONE;
+ }
+
+ /* advance to the next generation */
+ /* XXX: we really need to make sure this new generation number isn't in
+ * use by any of the children.
+ */
+ ++retained->mpm->my_generation;
+ ap_scoreboard_image->global->running_generation = retained->mpm->my_generation;
+
+ if (!retained->mpm->is_ungraceful) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00171)
+ "Graceful restart requested, doing restart");
+
+ /* kill off the idle ones */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ ap_mpm_pod_killpg(all_buckets[i].pod, retained->max_daemons_limit);
+ }
+
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request. This will break
+ * in a very nasty way if we ever have the scoreboard totally
+ * file-based (no shared memory)
+ */
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
+ ap_scoreboard_image->servers[index][0].status = SERVER_GRACEFUL;
+ /* Ask each child to close its listeners.
+ *
+ * NOTE: we use the scoreboard, because if we send SIGUSR1
+ * to every process in the group, this may include CGI's,
+ * piped loggers, etc. They almost certainly won't handle
+ * it gracefully.
+ */
+ ap_mpm_safe_kill(ap_scoreboard_image->parent[index].pid, AP_SIG_GRACEFUL);
+ }
+ }
+ }
+ else {
+ /* Kill 'em off */
+ if (ap_unixd_killpg(getpgrp(), SIGHUP) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00172) "killpg SIGHUP");
+ }
+ ap_reclaim_child_processes(0, /* Not when just starting up */
+ prefork_note_child_killed);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00173)
+ "SIGHUP received. Attempting to restart");
+ }
+
+ return OK;
+}
+
+/* This really should be a post_config hook, but the error log is already
+ * redirected by that point, so we need to do this in the open_logs phase.
+ */
+static int prefork_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+ int level_flags = 0;
+ ap_listen_rec **listen_buckets;
+ apr_status_t rv;
+ char id[16];
+ int i;
+
+ pconf = p;
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (retained->mpm->module_loads == 1) {
+ startup = 1;
+ level_flags |= APLOG_STARTUP;
+ }
+
+ if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT | level_flags, 0,
+ (startup ? NULL : s),
+ "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ if (one_process) {
+ retained->mpm->num_buckets = 1;
+ }
+ else if (!retained->mpm->was_graceful) {
+ /* Preserve the number of buckets on graceful restarts. */
+ retained->mpm->num_buckets = 0;
+ }
+ if ((rv = ap_duplicate_listeners(pconf, ap_server_conf,
+ &listen_buckets, &retained->mpm->num_buckets))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not duplicate listeners");
+ return !OK;
+ }
+ all_buckets = apr_pcalloc(pconf, retained->mpm->num_buckets *
+ sizeof(prefork_child_bucket));
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ if ((rv = ap_mpm_pod_open(pconf, &all_buckets[i].pod))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not open pipe-of-death");
+ return !OK;
+ }
+ /* Initialize cross-process accept lock (safe accept needed only) */
+ if ((rv = SAFE_ACCEPT((apr_snprintf(id, sizeof id, "%i", i),
+ ap_proc_mutex_create(&all_buckets[i].mutex,
+ NULL, AP_ACCEPT_MUTEX_TYPE,
+ id, s, pconf, 0))))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not create accept mutex");
+ return !OK;
+ }
+ all_buckets[i].listeners = listen_buckets[i];
+ }
+
+ return OK;
+}
+
+static int prefork_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+ int no_detach, debug, foreground;
+ apr_status_t rv;
+ const char *userdata_key = "mpm_prefork_module";
+
+ debug = ap_exists_config_define("DEBUG");
+
+ if (debug) {
+ foreground = one_process = 1;
+ no_detach = 0;
+ }
+ else
+ {
+ no_detach = ap_exists_config_define("NO_DETACH");
+ one_process = ap_exists_config_define("ONE_PROCESS");
+ foreground = ap_exists_config_define("FOREGROUND");
+ }
+
+ ap_mutex_register(p, AP_ACCEPT_MUTEX_TYPE, NULL, APR_LOCK_DEFAULT, 0);
+
+ retained = ap_retained_data_get(userdata_key);
+ if (!retained) {
+ retained = ap_retained_data_create(userdata_key, sizeof(*retained));
+ retained->mpm = ap_unixd_mpm_get_retained_data();
+ retained->idle_spawn_rate = 1;
+ }
+ retained->mpm->mpm_state = AP_MPMQ_STARTING;
+ if (retained->mpm->baton != retained) {
+ retained->mpm->was_graceful = 0;
+ retained->mpm->baton = retained;
+ }
+ ++retained->mpm->module_loads;
+
+ /* sigh, want this only the second time around */
+ if (retained->mpm->module_loads == 2) {
+ if (!one_process && !foreground) {
+ /* before we detach, setup crash handlers to log to errorlog */
+ ap_fatal_signal_setup(ap_server_conf, p /* == pconf */);
+ rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
+ : APR_PROC_DETACH_DAEMONIZE);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00174)
+ "apr_proc_detach failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+ }
+
+ parent_pid = ap_my_pid = getpid();
+
+ ap_listen_pre_config();
+ ap_daemons_to_start = DEFAULT_START_DAEMON;
+ ap_daemons_min_free = DEFAULT_MIN_FREE_DAEMON;
+ ap_daemons_max_free = DEFAULT_MAX_FREE_DAEMON;
+ server_limit = DEFAULT_SERVER_LIMIT;
+ ap_daemons_limit = server_limit;
+ ap_extended_status = 0;
+
+ return OK;
+}
+
+static int prefork_check_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (retained->mpm->module_loads == 1) {
+ startup = 1;
+ }
+
+ if (server_limit > MAX_SERVER_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00175)
+ "WARNING: ServerLimit of %d exceeds compile-time "
+ "limit of %d servers, decreasing to %d.",
+ server_limit, MAX_SERVER_LIMIT, MAX_SERVER_LIMIT);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00176)
+ "ServerLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ server_limit, MAX_SERVER_LIMIT);
+ }
+ server_limit = MAX_SERVER_LIMIT;
+ }
+ else if (server_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00177)
+ "WARNING: ServerLimit of %d not allowed, "
+ "increasing to 1.", server_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00178)
+ "ServerLimit of %d not allowed, increasing to 1",
+ server_limit);
+ }
+ server_limit = 1;
+ }
+
+ /* you cannot change ServerLimit across a restart; ignore
+ * any such attempts
+ */
+ if (!retained->first_server_limit) {
+ retained->first_server_limit = server_limit;
+ }
+ else if (server_limit != retained->first_server_limit) {
+ /* don't need a startup console version here */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00179)
+ "changing ServerLimit to %d from original value of %d "
+ "not allowed during restart",
+ server_limit, retained->first_server_limit);
+ server_limit = retained->first_server_limit;
+ }
+
+ if (ap_daemons_limit > server_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00180)
+ "WARNING: MaxRequestWorkers of %d exceeds ServerLimit "
+ "value of %d servers, decreasing MaxRequestWorkers to %d. "
+ "To increase, please see the ServerLimit directive.",
+ ap_daemons_limit, server_limit, server_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00181)
+ "MaxRequestWorkers of %d exceeds ServerLimit value "
+ "of %d, decreasing to match",
+ ap_daemons_limit, server_limit);
+ }
+ ap_daemons_limit = server_limit;
+ }
+ else if (ap_daemons_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00182)
+ "WARNING: MaxRequestWorkers of %d not allowed, "
+ "increasing to 1.", ap_daemons_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00183)
+ "MaxRequestWorkers of %d not allowed, increasing to 1",
+ ap_daemons_limit);
+ }
+ ap_daemons_limit = 1;
+ }
+
+ /* ap_daemons_to_start > ap_daemons_limit checked in prefork_run() */
+ if (ap_daemons_to_start < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00184)
+ "WARNING: StartServers of %d not allowed, "
+ "increasing to 1.", ap_daemons_to_start);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00185)
+ "StartServers of %d not allowed, increasing to 1",
+ ap_daemons_to_start);
+ }
+ ap_daemons_to_start = 1;
+ }
+
+ if (ap_daemons_min_free < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00186)
+ "WARNING: MinSpareServers of %d not allowed, "
+ "increasing to 1 to avoid almost certain server failure. "
+ "Please read the documentation.", ap_daemons_min_free);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00187)
+ "MinSpareServers of %d not allowed, increasing to 1",
+ ap_daemons_min_free);
+ }
+ ap_daemons_min_free = 1;
+ }
+
+ /* ap_daemons_max_free < ap_daemons_min_free + 1 checked in prefork_run() */
+
+ return OK;
+}
+
+static void prefork_hooks(apr_pool_t *p)
+{
+ /* Our open_logs hook function must run before the core's, or stderr
+ * will be redirected to a file, and the messages won't print to the
+ * console.
+ */
+ static const char *const aszSucc[] = {"core.c", NULL};
+
+ ap_hook_open_logs(prefork_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
+ /* we need to set the MPM state before other pre-config hooks use MPM query
+ * to retrieve it, so register as REALLY_FIRST
+ */
+ ap_hook_pre_config(prefork_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+ ap_hook_check_config(prefork_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm(prefork_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(prefork_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(prefork_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_daemons_to_start = atoi(arg);
+ return NULL;
+}
+
+static const char *set_min_free_servers(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_daemons_min_free = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_free_servers(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_daemons_max_free = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_clients (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+ if (!strcasecmp(cmd->cmd->name, "MaxClients")) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO(00188)
+ "MaxClients is deprecated, use MaxRequestWorkers "
+ "instead.");
+ }
+ ap_daemons_limit = atoi(arg);
+ return NULL;
+}
+
+static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ server_limit = atoi(arg);
+ return NULL;
+}
+
+static const command_rec prefork_cmds[] = {
+LISTEN_COMMANDS,
+AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
+ "Number of child processes launched at server startup"),
+AP_INIT_TAKE1("MinSpareServers", set_min_free_servers, NULL, RSRC_CONF,
+ "Minimum number of idle children, to handle request spikes"),
+AP_INIT_TAKE1("MaxSpareServers", set_max_free_servers, NULL, RSRC_CONF,
+ "Maximum number of idle children"),
+AP_INIT_TAKE1("MaxClients", set_max_clients, NULL, RSRC_CONF,
+ "Deprecated name of MaxRequestWorkers"),
+AP_INIT_TAKE1("MaxRequestWorkers", set_max_clients, NULL, RSRC_CONF,
+ "Maximum number of children alive at the same time"),
+AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
+ "Maximum value of MaxRequestWorkers for this run of Apache"),
+AP_GRACEFUL_SHUTDOWN_TIMEOUT_COMMAND,
+{ NULL }
+};
+
+AP_DECLARE_MODULE(mpm_prefork) = {
+ MPM20_MODULE_STUFF,
+ NULL, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ prefork_cmds, /* command apr_table_t */
+ prefork_hooks, /* register hooks */
+};
diff --git a/server/mpm/winnt/Makefile.in b/server/mpm/winnt/Makefile.in
new file mode 100644
index 0000000..f34af9c
--- /dev/null
+++ b/server/mpm/winnt/Makefile.in
@@ -0,0 +1 @@
+include $(top_srcdir)/build/special.mk
diff --git a/server/mpm/winnt/child.c b/server/mpm/winnt/child.c
new file mode 100644
index 0000000..05151a8
--- /dev/null
+++ b/server/mpm/winnt/child.c
@@ -0,0 +1,1306 @@
+/* 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.
+ */
+
+#ifdef WIN32
+
+#include "apr.h"
+#include <process.h>
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h" /* for read_config */
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "http_vhost.h" /* for ap_update_vhost_given_ip */
+#include "apr_portable.h"
+#include "apr_thread_proc.h"
+#include "apr_getopt.h"
+#include "apr_strings.h"
+#include "apr_lib.h"
+#include "apr_shm.h"
+#include "apr_thread_mutex.h"
+#include "ap_mpm.h"
+#include "ap_config.h"
+#include "ap_listen.h"
+#include "mpm_default.h"
+#include "mpm_winnt.h"
+#include "mpm_common.h"
+#include <malloc.h>
+#include "apr_atomic.h"
+#include "apr_buckets.h"
+#include "scoreboard.h"
+
+#ifdef __MINGW32__
+#include <mswsock.h>
+
+#ifndef WSAID_ACCEPTEX
+#define WSAID_ACCEPTEX \
+ {0xb5367df1, 0xcbac, 0x11cf, {0x95, 0xca, 0x00, 0x80, 0x5f, 0x48, 0xa1, 0x92}}
+typedef BOOL (WINAPI *LPFN_ACCEPTEX)(SOCKET, SOCKET, PVOID, DWORD, DWORD, DWORD, LPDWORD, LPOVERLAPPED);
+#endif /* WSAID_ACCEPTEX */
+
+#ifndef WSAID_GETACCEPTEXSOCKADDRS
+#define WSAID_GETACCEPTEXSOCKADDRS \
+ {0xb5367df2, 0xcbac, 0x11cf, {0x95, 0xca, 0x00, 0x80, 0x5f, 0x48, 0xa1, 0x92}}
+typedef VOID (WINAPI *LPFN_GETACCEPTEXSOCKADDRS)(PVOID, DWORD, DWORD, DWORD,
+ struct sockaddr **, LPINT,
+ struct sockaddr **, LPINT);
+#endif /* WSAID_GETACCEPTEXSOCKADDRS */
+
+#endif /* __MINGW32__ */
+
+/*
+ * The Windows MPM uses a queue of completion contexts that it passes
+ * between the accept threads and the worker threads. Declare the
+ * functions to access the queue and the structures passed on the
+ * queue in the header file to enable modules to access them
+ * if necessary. The queue resides in the MPM.
+ */
+#ifdef CONTAINING_RECORD
+#undef CONTAINING_RECORD
+#endif
+#define CONTAINING_RECORD(address, type, field) ((type *)( \
+ (char *)(address) - \
+ (char *)(&((type *)0)->field)))
+#if APR_HAVE_IPV6
+#define PADDED_ADDR_SIZE (sizeof(SOCKADDR_IN6)+16)
+#else
+#define PADDED_ADDR_SIZE (sizeof(SOCKADDR_IN)+16)
+#endif
+
+APLOG_USE_MODULE(mpm_winnt);
+
+/* Queue for managing the passing of winnt_conn_ctx_t between
+ * the accept and worker threads.
+ */
+typedef struct winnt_conn_ctx_t_s {
+ struct winnt_conn_ctx_t_s *next;
+ OVERLAPPED overlapped;
+ apr_socket_t *sock;
+ SOCKET accept_socket;
+ char buff[2*PADDED_ADDR_SIZE];
+ struct sockaddr *sa_server;
+ int sa_server_len;
+ struct sockaddr *sa_client;
+ int sa_client_len;
+ apr_pool_t *ptrans;
+ apr_bucket_alloc_t *ba;
+ apr_bucket *data;
+#if APR_HAVE_IPV6
+ short socket_family;
+#endif
+} winnt_conn_ctx_t;
+
+typedef enum {
+ IOCP_CONNECTION_ACCEPTED = 1,
+ IOCP_WAIT_FOR_RECEIVE = 2,
+ IOCP_WAIT_FOR_TRANSMITFILE = 3,
+ IOCP_SHUTDOWN = 4
+} io_state_e;
+
+static apr_pool_t *pchild;
+static int shutdown_in_progress = 0;
+static int workers_may_exit = 0;
+static unsigned int g_blocked_threads = 0;
+static HANDLE max_requests_per_child_event;
+
+static apr_thread_mutex_t *child_lock;
+static apr_thread_mutex_t *qlock;
+static winnt_conn_ctx_t *qhead = NULL;
+static winnt_conn_ctx_t *qtail = NULL;
+static apr_uint32_t num_completion_contexts = 0;
+static apr_uint32_t max_num_completion_contexts = 0;
+static HANDLE ThreadDispatchIOCP = NULL;
+static HANDLE qwait_event = NULL;
+
+static void mpm_recycle_completion_context(winnt_conn_ctx_t *context)
+{
+ /* Recycle the completion context.
+ * - clear the ptrans pool
+ * - put the context on the queue to be consumed by the accept thread
+ * Note:
+ * context->accept_socket may be in a disconnected but reusable
+ * state so -don't- close it.
+ */
+ if (context) {
+ HANDLE saved_event;
+
+ apr_pool_clear(context->ptrans);
+ context->ba = apr_bucket_alloc_create(context->ptrans);
+ context->next = NULL;
+
+ saved_event = context->overlapped.hEvent;
+ memset(&context->overlapped, 0, sizeof(context->overlapped));
+ context->overlapped.hEvent = saved_event;
+ ResetEvent(context->overlapped.hEvent);
+
+ apr_thread_mutex_lock(qlock);
+ if (qtail) {
+ qtail->next = context;
+ } else {
+ qhead = context;
+ SetEvent(qwait_event);
+ }
+ qtail = context;
+ apr_thread_mutex_unlock(qlock);
+ }
+}
+
+static winnt_conn_ctx_t *mpm_get_completion_context(int *timeout)
+{
+ apr_status_t rv;
+ winnt_conn_ctx_t *context = NULL;
+
+ *timeout = 0;
+ while (1) {
+ /* Grab a context off the queue */
+ apr_thread_mutex_lock(qlock);
+ if (qhead) {
+ context = qhead;
+ qhead = qhead->next;
+ if (!qhead)
+ qtail = NULL;
+ } else {
+ ResetEvent(qwait_event);
+ }
+ apr_thread_mutex_unlock(qlock);
+
+ if (!context) {
+ /* We failed to grab a context off the queue, consider allocating
+ * a new one out of the child pool. There may be up to
+ * (ap_threads_per_child + num_listeners) contexts in the system
+ * at once.
+ */
+ if (num_completion_contexts >= max_num_completion_contexts) {
+ /* All workers are busy, need to wait for one */
+ static int reported = 0;
+ if (!reported) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00326)
+ "Server ran out of threads to serve "
+ "requests. Consider raising the "
+ "ThreadsPerChild setting");
+ reported = 1;
+ }
+
+ /* Wait for a worker to free a context. Once per second, give
+ * the caller a chance to check for shutdown. If the wait
+ * succeeds, get the context off the queue. It must be
+ * available, since there's only one consumer.
+ */
+ rv = WaitForSingleObject(qwait_event, 1000);
+ if (rv == WAIT_OBJECT_0)
+ continue;
+ else {
+ if (rv == WAIT_TIMEOUT) {
+ /* somewhat-normal condition where threads are busy */
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00327)
+ "mpm_get_completion_context: Failed to get a "
+ "free context within 1 second");
+ *timeout = 1;
+ }
+ else {
+ /* should be the unexpected, generic WAIT_FAILED */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_os_error(),
+ ap_server_conf, APLOGNO(00328)
+ "mpm_get_completion_context: "
+ "WaitForSingleObject failed to get free context");
+ }
+ return NULL;
+ }
+ } else {
+ /* Allocate another context.
+ * Note: Multiple failures in the next two steps will cause
+ * the pchild pool to 'leak' storage. I don't think this
+ * is worth fixing...
+ */
+ apr_allocator_t *allocator;
+
+ apr_thread_mutex_lock(child_lock);
+ context = (winnt_conn_ctx_t *)apr_pcalloc(pchild,
+ sizeof(winnt_conn_ctx_t));
+
+
+ context->overlapped.hEvent = CreateEvent(NULL, TRUE,
+ FALSE, NULL);
+ if (context->overlapped.hEvent == NULL) {
+ /* Hopefully this is a temporary condition ... */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_os_error(),
+ ap_server_conf, APLOGNO(00329)
+ "mpm_get_completion_context: "
+ "CreateEvent failed.");
+
+ apr_thread_mutex_unlock(child_lock);
+ return NULL;
+ }
+
+ /* Create the transaction pool */
+ apr_allocator_create(&allocator);
+ apr_allocator_max_free_set(allocator, ap_max_mem_free);
+ rv = apr_pool_create_ex(&context->ptrans, pchild, NULL,
+ allocator);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, APLOGNO(00330)
+ "mpm_get_completion_context: Failed "
+ "to create the transaction pool.");
+ CloseHandle(context->overlapped.hEvent);
+
+ apr_thread_mutex_unlock(child_lock);
+ return NULL;
+ }
+ apr_allocator_owner_set(allocator, context->ptrans);
+ apr_pool_tag(context->ptrans, "transaction");
+
+ context->accept_socket = INVALID_SOCKET;
+ context->ba = apr_bucket_alloc_create(context->ptrans);
+ apr_atomic_inc32(&num_completion_contexts);
+
+ apr_thread_mutex_unlock(child_lock);
+ break;
+ }
+ } else {
+ /* Got a context from the queue */
+ break;
+ }
+ }
+
+ return context;
+}
+
+typedef enum {
+ ACCEPT_FILTER_NONE = 0,
+ ACCEPT_FILTER_CONNECT = 1
+} accept_filter_e;
+
+static const char * accept_filter_to_string(accept_filter_e accf)
+{
+ switch (accf) {
+ case ACCEPT_FILTER_NONE:
+ return "none";
+ case ACCEPT_FILTER_CONNECT:
+ return "connect";
+ default:
+ return "";
+ }
+}
+
+static accept_filter_e get_accept_filter(const char *protocol)
+{
+ core_server_config *core_sconf;
+ const char *name;
+
+ core_sconf = ap_get_core_module_config(ap_server_conf->module_config);
+ name = apr_table_get(core_sconf->accf_map, protocol);
+ if (!name) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf,
+ APLOGNO(02531) "winnt_accept: Listen protocol '%s' has "
+ "no known accept filter. Using 'none' instead",
+ protocol);
+ return ACCEPT_FILTER_NONE;
+ }
+ else if (strcmp(name, "data") == 0) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf,
+ APLOGNO(03458) "winnt_accept: 'data' accept filter is no "
+ "longer supported. Using 'connect' instead");
+ return ACCEPT_FILTER_CONNECT;
+ }
+ else if (strcmp(name, "connect") == 0) {
+ return ACCEPT_FILTER_CONNECT;
+ }
+ else if (strcmp(name, "none") == 0) {
+ return ACCEPT_FILTER_NONE;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(00331)
+ "winnt_accept: unrecognized AcceptFilter '%s', "
+ "only 'data', 'connect' or 'none' are valid. "
+ "Using 'none' instead", name);
+ return ACCEPT_FILTER_NONE;
+ }
+}
+
+/* Windows NT/2000 specific code...
+ * Accept processing for on Windows NT uses a producer/consumer queue
+ * model. An accept thread accepts connections off the network then issues
+ * PostQueuedCompletionStatus() to awake a thread blocked on the ThreadDispatch
+ * IOCompletionPort.
+ *
+ * winnt_accept()
+ * One or more accept threads run in this function, each of which accepts
+ * connections off the network and calls PostQueuedCompletionStatus() to
+ * queue an io completion packet to the ThreadDispatch IOCompletionPort.
+ * winnt_get_connection()
+ * Worker threads block on the ThreadDispatch IOCompletionPort awaiting
+ * connections to service.
+ */
+#define MAX_ACCEPTEX_ERR_COUNT 10
+
+static unsigned int __stdcall winnt_accept(void *lr_)
+{
+ ap_listen_rec *lr = (ap_listen_rec *)lr_;
+ apr_os_sock_info_t sockinfo;
+ winnt_conn_ctx_t *context = NULL;
+ DWORD BytesRead = 0;
+ SOCKET nlsd;
+ LPFN_ACCEPTEX lpfnAcceptEx = NULL;
+ LPFN_GETACCEPTEXSOCKADDRS lpfnGetAcceptExSockaddrs = NULL;
+ GUID GuidAcceptEx = WSAID_ACCEPTEX;
+ GUID GuidGetAcceptExSockaddrs = WSAID_GETACCEPTEXSOCKADDRS;
+ int rv;
+ accept_filter_e accf;
+ int err_count = 0;
+ HANDLE events[3];
+#if APR_HAVE_IPV6
+ SOCKADDR_STORAGE ss_listen;
+ int namelen = sizeof(ss_listen);
+#endif
+ u_long zero = 0;
+
+ apr_os_sock_get(&nlsd, lr->sd);
+
+#if APR_HAVE_IPV6
+ if (getsockname(nlsd, (struct sockaddr *)&ss_listen, &namelen) == SOCKET_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_netos_error(),
+ ap_server_conf, APLOGNO(00332)
+ "winnt_accept: getsockname error on listening socket, "
+ "is IPv6 available?");
+ return 1;
+ }
+#endif
+
+ accf = get_accept_filter(lr->protocol);
+ if (accf == ACCEPT_FILTER_CONNECT)
+ {
+ if (WSAIoctl(nlsd, SIO_GET_EXTENSION_FUNCTION_POINTER,
+ &GuidAcceptEx, sizeof GuidAcceptEx,
+ &lpfnAcceptEx, sizeof lpfnAcceptEx,
+ &BytesRead, NULL, NULL) == SOCKET_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_netos_error(),
+ ap_server_conf, APLOGNO(02322)
+ "winnt_accept: failed to retrieve AcceptEx, try 'AcceptFilter none'");
+ return 1;
+ }
+ if (WSAIoctl(nlsd, SIO_GET_EXTENSION_FUNCTION_POINTER,
+ &GuidGetAcceptExSockaddrs, sizeof GuidGetAcceptExSockaddrs,
+ &lpfnGetAcceptExSockaddrs, sizeof lpfnGetAcceptExSockaddrs,
+ &BytesRead, NULL, NULL) == SOCKET_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_netos_error(),
+ ap_server_conf, APLOGNO(02323)
+ "winnt_accept: failed to retrieve GetAcceptExSockaddrs, try 'AcceptFilter none'");
+ return 1;
+ }
+ /* first, high priority event is an already accepted connection */
+ events[1] = exit_event;
+ events[2] = max_requests_per_child_event;
+ }
+ else /* accf == ACCEPT_FILTER_NONE */
+ {
+reinit: /* target of connect upon too many AcceptEx failures */
+
+ /* last, low priority event is a not yet accepted connection */
+ events[0] = exit_event;
+ events[1] = max_requests_per_child_event;
+ events[2] = CreateEvent(NULL, FALSE, FALSE, NULL);
+
+ /* The event needs to be removed from the accepted socket,
+ * if not removed from the listen socket prior to accept(),
+ */
+ rv = WSAEventSelect(nlsd, events[2], FD_ACCEPT);
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_ERR,
+ apr_get_netos_error(), ap_server_conf, APLOGNO(00333)
+ "WSAEventSelect() failed.");
+ CloseHandle(events[2]);
+ return 1;
+ }
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00334)
+ "Child: Accept thread listening on %pI using AcceptFilter %s",
+ lr->bind_addr, accept_filter_to_string(accf));
+
+ while (!shutdown_in_progress) {
+ if (!context) {
+ int timeout;
+
+ context = mpm_get_completion_context(&timeout);
+ if (!context) {
+ if (!timeout) {
+ /* Hopefully a temporary condition in the provider? */
+ ++err_count;
+ if (err_count > MAX_ACCEPTEX_ERR_COUNT) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(00335)
+ "winnt_accept: Too many failures grabbing a "
+ "connection ctx. Aborting.");
+ break;
+ }
+ }
+ Sleep(100);
+ continue;
+ }
+ }
+
+ if (accf == ACCEPT_FILTER_CONNECT)
+ {
+ char *buf;
+
+ /* Create and initialize the accept socket */
+#if APR_HAVE_IPV6
+ if (context->accept_socket == INVALID_SOCKET) {
+ context->accept_socket = socket(ss_listen.ss_family, SOCK_STREAM,
+ IPPROTO_TCP);
+ context->socket_family = ss_listen.ss_family;
+ }
+ else if (context->socket_family != ss_listen.ss_family) {
+ closesocket(context->accept_socket);
+ context->accept_socket = socket(ss_listen.ss_family, SOCK_STREAM,
+ IPPROTO_TCP);
+ context->socket_family = ss_listen.ss_family;
+ }
+#else
+ if (context->accept_socket == INVALID_SOCKET)
+ context->accept_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+#endif
+
+ if (context->accept_socket == INVALID_SOCKET) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_netos_error(),
+ ap_server_conf, APLOGNO(00336)
+ "winnt_accept: Failed to allocate an accept socket. "
+ "Temporary resource constraint? Try again.");
+ Sleep(100);
+ continue;
+ }
+
+ buf = context->buff;
+
+ /* AcceptEx on the completion context. The completion context will be
+ * signaled when a connection is accepted.
+ */
+ if (!lpfnAcceptEx(nlsd, context->accept_socket, buf, 0,
+ PADDED_ADDR_SIZE, PADDED_ADDR_SIZE, &BytesRead,
+ &context->overlapped)) {
+ rv = apr_get_netos_error();
+ if ((rv == APR_FROM_OS_ERROR(WSAECONNRESET)) ||
+ (rv == APR_FROM_OS_ERROR(WSAEACCES))) {
+ /* We can get here when:
+ * 1) the client disconnects early
+ * 2) handshake was incomplete
+ */
+ closesocket(context->accept_socket);
+ context->accept_socket = INVALID_SOCKET;
+ continue;
+ }
+ else if ((rv == APR_FROM_OS_ERROR(WSAEINVAL)) ||
+ (rv == APR_FROM_OS_ERROR(WSAENOTSOCK))) {
+ /* We can get here when:
+ * 1) TransmitFile does not properly recycle the accept socket (typically
+ * because the client disconnected)
+ * 2) there is VPN or Firewall software installed with
+ * buggy WSAAccept or WSADuplicateSocket implementation
+ * 3) the dynamic address / adapter has changed
+ * Give five chances, then fall back on AcceptFilter 'none'
+ */
+ closesocket(context->accept_socket);
+ context->accept_socket = INVALID_SOCKET;
+ ++err_count;
+ if (err_count > MAX_ACCEPTEX_ERR_COUNT) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00337)
+ "Child: Encountered too many AcceptEx "
+ "faults accepting client connections. "
+ "Possible causes: dynamic address renewal, "
+ "or incompatible VPN or firewall software. ");
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, ap_server_conf, APLOGNO(00338)
+ "winnt_mpm: falling back to "
+ "'AcceptFilter none'.");
+ err_count = 0;
+ accf = ACCEPT_FILTER_NONE;
+ }
+ continue;
+ }
+ else if ((rv != APR_FROM_OS_ERROR(ERROR_IO_PENDING)) &&
+ (rv != APR_FROM_OS_ERROR(WSA_IO_PENDING))) {
+ closesocket(context->accept_socket);
+ context->accept_socket = INVALID_SOCKET;
+ ++err_count;
+ if (err_count > MAX_ACCEPTEX_ERR_COUNT) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00339)
+ "Child: Encountered too many AcceptEx "
+ "faults accepting client connections.");
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, ap_server_conf, APLOGNO(00340)
+ "winnt_mpm: falling back to "
+ "'AcceptFilter none'.");
+ err_count = 0;
+ accf = ACCEPT_FILTER_NONE;
+ goto reinit;
+ }
+ continue;
+ }
+
+ err_count = 0;
+ events[0] = context->overlapped.hEvent;
+
+ do {
+ rv = WaitForMultipleObjectsEx(3, events, FALSE, INFINITE, TRUE);
+ } while (rv == WAIT_IO_COMPLETION);
+
+ if (rv == WAIT_OBJECT_0) {
+ if ((context->accept_socket != INVALID_SOCKET) &&
+ !GetOverlappedResult((HANDLE)context->accept_socket,
+ &context->overlapped,
+ &BytesRead, FALSE)) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING,
+ apr_get_os_error(), ap_server_conf, APLOGNO(00341)
+ "winnt_accept: Asynchronous AcceptEx failed.");
+ closesocket(context->accept_socket);
+ context->accept_socket = INVALID_SOCKET;
+ }
+ }
+ else {
+ /* exit_event triggered or event handle was closed */
+ closesocket(context->accept_socket);
+ context->accept_socket = INVALID_SOCKET;
+ break;
+ }
+
+ if (context->accept_socket == INVALID_SOCKET) {
+ continue;
+ }
+ }
+ err_count = 0;
+
+ /* Potential optimization; consider handing off to the worker */
+
+ /* Inherit the listen socket settings. Required for
+ * shutdown() to work
+ */
+ if (setsockopt(context->accept_socket, SOL_SOCKET,
+ SO_UPDATE_ACCEPT_CONTEXT, (char *)&nlsd,
+ sizeof(nlsd))) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_netos_error(),
+ ap_server_conf, APLOGNO(00342)
+ "setsockopt(SO_UPDATE_ACCEPT_CONTEXT) failed.");
+ /* Not a failure condition. Keep running. */
+ }
+
+ /* Get the local & remote address
+ * TODO; error check
+ */
+ lpfnGetAcceptExSockaddrs(buf, 0, PADDED_ADDR_SIZE, PADDED_ADDR_SIZE,
+ &context->sa_server, &context->sa_server_len,
+ &context->sa_client, &context->sa_client_len);
+ }
+ else /* accf == ACCEPT_FILTER_NONE */
+ {
+ /* There is no socket reuse without AcceptEx() */
+ if (context->accept_socket != INVALID_SOCKET)
+ closesocket(context->accept_socket);
+
+ /* This could be a persistent event per-listener rather than
+ * per-accept. However, the event needs to be removed from
+ * the target socket if not removed from the listen socket
+ * prior to accept(), or the event select is inherited.
+ * and must be removed from the accepted socket.
+ */
+
+ do {
+ rv = WaitForMultipleObjectsEx(3, events, FALSE, INFINITE, TRUE);
+ } while (rv == WAIT_IO_COMPLETION);
+
+
+ if (rv != WAIT_OBJECT_0 + 2) {
+ /* not FD_ACCEPT;
+ * exit_event triggered or event handle was closed
+ */
+ break;
+ }
+
+ context->sa_server = (void *) context->buff;
+ context->sa_server_len = sizeof(context->buff) / 2;
+ context->sa_client_len = context->sa_server_len;
+ context->sa_client = (void *) (context->buff
+ + context->sa_server_len);
+
+ context->accept_socket = accept(nlsd, context->sa_server,
+ &context->sa_server_len);
+
+ if (context->accept_socket == INVALID_SOCKET) {
+
+ rv = apr_get_netos_error();
+ if ( rv == APR_FROM_OS_ERROR(WSAECONNRESET)
+ || rv == APR_FROM_OS_ERROR(WSAEINPROGRESS)
+ || rv == APR_FROM_OS_ERROR(WSAEWOULDBLOCK) ) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG,
+ rv, ap_server_conf, APLOGNO(00343)
+ "accept() failed, retrying.");
+ continue;
+ }
+
+ /* A more serious error than 'retry', log it */
+ ap_log_error(APLOG_MARK, APLOG_WARNING,
+ rv, ap_server_conf, APLOGNO(00344)
+ "accept() failed.");
+
+ if ( rv == APR_FROM_OS_ERROR(WSAEMFILE)
+ || rv == APR_FROM_OS_ERROR(WSAENOBUFS) ) {
+ /* Hopefully a temporary condition in the provider? */
+ Sleep(100);
+ ++err_count;
+ if (err_count > MAX_ACCEPTEX_ERR_COUNT) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00345)
+ "Child: Encountered too many accept() "
+ "resource faults, aborting.");
+ break;
+ }
+ continue;
+ }
+ break;
+ }
+ /* Per MSDN, cancel the inherited association of this socket
+ * to the WSAEventSelect API, and restore the state corresponding
+ * to apr_os_sock_make's default assumptions (really, a flaw within
+ * os_sock_make and os_sock_put that it does not query).
+ */
+ WSAEventSelect(context->accept_socket, 0, 0);
+ err_count = 0;
+
+ context->sa_server_len = sizeof(context->buff) / 2;
+ if (getsockname(context->accept_socket, context->sa_server,
+ &context->sa_server_len) == SOCKET_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_netos_error(), ap_server_conf, APLOGNO(00346)
+ "getsockname failed");
+ continue;
+ }
+ if ((getpeername(context->accept_socket, context->sa_client,
+ &context->sa_client_len)) == SOCKET_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_netos_error(), ap_server_conf, APLOGNO(00347)
+ "getpeername failed");
+ memset(&context->sa_client, '\0', sizeof(context->sa_client));
+ }
+ }
+
+ sockinfo.os_sock = &context->accept_socket;
+ sockinfo.local = context->sa_server;
+ sockinfo.remote = context->sa_client;
+ sockinfo.family = context->sa_server->sa_family;
+ sockinfo.type = SOCK_STREAM;
+ sockinfo.protocol = IPPROTO_TCP;
+ /* Restore the state corresponding to apr_os_sock_make's default
+ * assumption of timeout -1 (really, a flaw of os_sock_make and
+ * os_sock_put that it does not query to determine ->timeout).
+ * XXX: Upon a fix to APR, these three statements should disappear.
+ */
+ ioctlsocket(context->accept_socket, FIONBIO, &zero);
+ setsockopt(context->accept_socket, SOL_SOCKET, SO_RCVTIMEO,
+ (char *) &zero, sizeof(zero));
+ setsockopt(context->accept_socket, SOL_SOCKET, SO_SNDTIMEO,
+ (char *) &zero, sizeof(zero));
+ apr_os_sock_make(&context->sock, &sockinfo, context->ptrans);
+
+ /* When a connection is received, send an io completion notification
+ * to the ThreadDispatchIOCP.
+ */
+ PostQueuedCompletionStatus(ThreadDispatchIOCP, BytesRead,
+ IOCP_CONNECTION_ACCEPTED,
+ &context->overlapped);
+ context = NULL;
+ }
+ if (accf == ACCEPT_FILTER_NONE)
+ CloseHandle(events[2]);
+
+ if (!shutdown_in_progress) {
+ /* Yow, hit an irrecoverable error! Tell the child to die. */
+ SetEvent(exit_event);
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00348)
+ "Child: Accept thread exiting.");
+ return 0;
+}
+
+
+static winnt_conn_ctx_t *winnt_get_connection(winnt_conn_ctx_t *context)
+{
+ int rc;
+ DWORD BytesRead;
+ LPOVERLAPPED pol;
+#ifdef _WIN64
+ ULONG_PTR CompKey;
+#else
+ DWORD CompKey;
+#endif
+
+ mpm_recycle_completion_context(context);
+
+ apr_atomic_inc32(&g_blocked_threads);
+ while (1) {
+ if (workers_may_exit) {
+ apr_atomic_dec32(&g_blocked_threads);
+ return NULL;
+ }
+ rc = GetQueuedCompletionStatus(ThreadDispatchIOCP, &BytesRead,
+ &CompKey, &pol, INFINITE);
+ if (!rc) {
+ rc = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rc, ap_server_conf, APLOGNO(00349)
+ "Child: GetQueuedCompletionStatus returned %d",
+ rc);
+ continue;
+ }
+
+ switch (CompKey) {
+ case IOCP_CONNECTION_ACCEPTED:
+ context = CONTAINING_RECORD(pol, winnt_conn_ctx_t, overlapped);
+ break;
+ case IOCP_SHUTDOWN:
+ apr_atomic_dec32(&g_blocked_threads);
+ return NULL;
+ default:
+ apr_atomic_dec32(&g_blocked_threads);
+ return NULL;
+ }
+ break;
+ }
+ apr_atomic_dec32(&g_blocked_threads);
+
+ return context;
+}
+
+/*
+ * worker_main()
+ * Main entry point for the worker threads. Worker threads block in
+ * win*_get_connection() awaiting a connection to service.
+ */
+static DWORD __stdcall worker_main(void *thread_num_val)
+{
+ apr_thread_t *thd = NULL;
+ apr_os_thread_t osthd = NULL;
+ static int requests_this_child = 0;
+ winnt_conn_ctx_t *context = NULL;
+ int thread_num = (int)thread_num_val;
+ ap_sb_handle_t *sbh;
+ conn_rec *c;
+ apr_int32_t disconnected;
+
+#if AP_HAS_THREAD_LOCAL
+ if (ap_thread_current_create(&thd, NULL, pchild) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(10376)
+ "Couldn't initialize worker thread, thread locals won't "
+ "be available");
+ osthd = apr_os_thread_current();
+ }
+#else
+ osthd = apr_os_thread_current();
+#endif
+
+ while (1) {
+
+ ap_update_child_status_from_indexes(0, thread_num, SERVER_READY, NULL);
+
+ /* Grab a connection off the network */
+ context = winnt_get_connection(context);
+
+ if (!context) {
+ /* Time for the thread to exit */
+ break;
+ }
+
+ /* Have we hit MaxConnectionsPerChild connections? */
+ if (ap_max_requests_per_child) {
+ requests_this_child++;
+ if (requests_this_child > ap_max_requests_per_child) {
+ SetEvent(max_requests_per_child_event);
+ }
+ }
+
+ ap_create_sb_handle(&sbh, context->ptrans, 0, thread_num);
+ c = ap_run_create_connection(context->ptrans, ap_server_conf,
+ context->sock, thread_num, sbh,
+ context->ba);
+
+ if (!c) {
+ /* ap_run_create_connection closes the socket on failure */
+ context->accept_socket = INVALID_SOCKET;
+ continue;
+ }
+
+ if (osthd) {
+ thd = NULL;
+ apr_os_thread_put(&thd, &osthd, context->ptrans);
+ }
+ c->current_thread = thd;
+
+ ap_process_connection(c, context->sock);
+
+ ap_lingering_close(c);
+
+ apr_socket_opt_get(context->sock, APR_SO_DISCONNECTED, &disconnected);
+ if (!disconnected) {
+ context->accept_socket = INVALID_SOCKET;
+ }
+ }
+
+ ap_update_child_status_from_indexes(0, thread_num, SERVER_DEAD, NULL);
+
+#if AP_HAS_THREAD_LOCAL
+ if (!osthd) {
+ apr_pool_destroy(apr_thread_pool_get(thd));
+ }
+#endif
+
+ return 0;
+}
+
+
+static void cleanup_thread(HANDLE *handles, int *thread_cnt,
+ int thread_to_clean)
+{
+ int i;
+
+ CloseHandle(handles[thread_to_clean]);
+ for (i = thread_to_clean; i < ((*thread_cnt) - 1); i++)
+ handles[i] = handles[i + 1];
+ (*thread_cnt)--;
+}
+
+
+/*
+ * child_main()
+ * Entry point for the main control thread for the child process.
+ * This thread creates the accept thread, worker threads and
+ * monitors the child process for maintenance and shutdown
+ * events.
+ */
+static void create_listener_thread(void)
+{
+ unsigned tid;
+ int num_listeners = 0;
+ /* Start an accept thread per listener
+ * XXX: Why would we have a NULL sd in our listeners?
+ */
+ ap_listen_rec *lr;
+
+ /* Number of completion_contexts allowed in the system is
+ * (ap_threads_per_child + num_listeners). We need the additional
+ * completion contexts to prevent server hangs when ThreadsPerChild
+ * is configured to something less than or equal to the number
+ * of listeners. This is not a usual case, but people have
+ * encountered it.
+ */
+ for (lr = ap_listeners; lr ; lr = lr->next) {
+ num_listeners++;
+ }
+ max_num_completion_contexts = ap_threads_per_child + num_listeners;
+
+ /* Now start a thread per listener */
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ if (lr->sd != NULL) {
+ /* A smaller stack is sufficient.
+ * To convert to CreateThread, the returned handle cannot be
+ * ignored, it must be closed/joined.
+ */
+ _beginthreadex(NULL, 65536, winnt_accept,
+ (void *) lr, stack_res_flag, &tid);
+ }
+ }
+}
+
+
+void child_main(apr_pool_t *pconf, DWORD parent_pid)
+{
+ apr_status_t status;
+ apr_hash_t *ht;
+ ap_listen_rec *lr;
+ HANDLE child_events[3];
+ HANDLE *child_handles;
+ int listener_started = 0;
+ int threads_created = 0;
+ int watch_thread;
+ int time_remains;
+ int cld;
+ DWORD tid;
+ int rv;
+ int i;
+ int num_events;
+
+ /* Get a sub context for global allocations in this child, so that
+ * we can have cleanups occur when the child exits.
+ */
+ apr_pool_create(&pchild, pconf);
+ apr_pool_tag(pchild, "pchild");
+
+ ap_run_child_init(pchild, ap_server_conf);
+ ht = apr_hash_make(pchild);
+
+ /* Initialize the child_events */
+ max_requests_per_child_event = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (!max_requests_per_child_event) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00350)
+ "Child: Failed to create a max_requests event.");
+ exit(APEXIT_CHILDINIT);
+ }
+ child_events[0] = exit_event;
+ child_events[1] = max_requests_per_child_event;
+
+ if (parent_pid != my_pid) {
+ child_events[2] = OpenProcess(SYNCHRONIZE, FALSE, parent_pid);
+ if (child_events[2] == NULL) {
+ num_events = 2;
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), ap_server_conf, APLOGNO(02643)
+ "Child: Failed to open handle to parent process %ld; "
+ "will not react to abrupt parent termination", parent_pid);
+ }
+ else {
+ num_events = 3;
+ }
+ }
+ else {
+ /* presumably -DONE_PROCESS */
+ child_events[2] = NULL;
+ num_events = 2;
+ }
+
+ /*
+ * Wait until we have permission to start accepting connections.
+ * start_mutex is used to ensure that only one child ever
+ * goes into the listen/accept loop at once.
+ */
+ status = apr_proc_mutex_lock(start_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, status, ap_server_conf, APLOGNO(00351)
+ "Child: Failed to acquire the start_mutex. "
+ "Process will exit.");
+ exit(APEXIT_CHILDINIT);
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00352)
+ "Child: Acquired the start mutex.");
+
+ /*
+ * Create the worker thread dispatch IOCompletionPort
+ */
+ /* Create the worker thread dispatch IOCP */
+ ThreadDispatchIOCP = CreateIoCompletionPort(INVALID_HANDLE_VALUE,
+ NULL, 0, 0);
+ apr_thread_mutex_create(&qlock, APR_THREAD_MUTEX_DEFAULT, pchild);
+ qwait_event = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (!qwait_event) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(),
+ ap_server_conf, APLOGNO(00353)
+ "Child: Failed to create a qwait event.");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ /*
+ * Create the pool of worker threads
+ */
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00354)
+ "Child: Starting %d worker threads.", ap_threads_per_child);
+ child_handles = (HANDLE) apr_pcalloc(pchild, ap_threads_per_child
+ * sizeof(HANDLE));
+ apr_thread_mutex_create(&child_lock, APR_THREAD_MUTEX_DEFAULT, pchild);
+
+ while (1) {
+ for (i = 0; i < ap_threads_per_child; i++) {
+ int *score_idx;
+ int status = ap_scoreboard_image->servers[0][i].status;
+ if (status != SERVER_GRACEFUL && status != SERVER_DEAD) {
+ continue;
+ }
+ ap_update_child_status_from_indexes(0, i, SERVER_STARTING, NULL);
+
+ child_handles[i] = CreateThread(NULL, ap_thread_stacksize,
+ worker_main, (void *) i,
+ stack_res_flag, &tid);
+ if (child_handles[i] == 0) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(),
+ ap_server_conf, APLOGNO(00355)
+ "Child: CreateThread failed. Unable to "
+ "create all worker threads. Created %d of the %d "
+ "threads requested with the ThreadsPerChild "
+ "configuration directive.",
+ threads_created, ap_threads_per_child);
+ ap_signal_parent(SIGNAL_PARENT_SHUTDOWN);
+ goto shutdown;
+ }
+ threads_created++;
+ /* Save the score board index in ht keyed to the thread handle.
+ * We need this when cleaning up threads down below...
+ */
+ apr_thread_mutex_lock(child_lock);
+ score_idx = apr_pcalloc(pchild, sizeof(int));
+ *score_idx = i;
+ apr_hash_set(ht, &child_handles[i], sizeof(HANDLE), score_idx);
+ apr_thread_mutex_unlock(child_lock);
+ }
+ /* Start the listener only when workers are available */
+ if (!listener_started && threads_created) {
+ create_listener_thread();
+ listener_started = 1;
+ winnt_mpm_state = AP_MPMQ_RUNNING;
+ }
+ if (threads_created == ap_threads_per_child) {
+ break;
+ }
+ /* Check to see if the child has been told to exit */
+ if (WaitForSingleObject(exit_event, 0) != WAIT_TIMEOUT) {
+ break;
+ }
+ /* wait for previous generation to clean up an entry in the scoreboard
+ */
+ apr_sleep(1 * APR_USEC_PER_SEC);
+ }
+
+ /* Wait for one of these events:
+ * exit_event:
+ * The exit_event is signaled by the parent process to notify
+ * the child that it is time to exit.
+ *
+ * max_requests_per_child_event:
+ * This event is signaled by the worker threads to indicate that
+ * the process has handled MaxConnectionsPerChild connections.
+ *
+ * parent process exiting
+ *
+ * TIMEOUT:
+ * To do periodic maintenance on the server (check for thread exits,
+ * number of completion contexts, etc.)
+ *
+ * XXX: thread exits *aren't* being checked.
+ *
+ * XXX: other_child - we need the process handles to the other children
+ * in order to map them to apr_proc_other_child_read (which is not
+ * named well, it's more like a_p_o_c_died.)
+ *
+ * XXX: however - if we get a_p_o_c handle inheritance working, and
+ * the parent process creates other children and passes the pipes
+ * to our worker processes, then we have no business doing such
+ * things in the child_main loop, but should happen in master_main.
+ */
+ while (1) {
+#if !APR_HAS_OTHER_CHILD
+ rv = WaitForMultipleObjects(num_events, (HANDLE *)child_events, FALSE, INFINITE);
+ cld = rv - WAIT_OBJECT_0;
+#else
+ /* THIS IS THE EXPECTED BUILD VARIATION -- APR_HAS_OTHER_CHILD */
+ rv = WaitForMultipleObjects(num_events, (HANDLE *)child_events, FALSE, 1000);
+ cld = rv - WAIT_OBJECT_0;
+ if (rv == WAIT_TIMEOUT) {
+ apr_proc_other_child_refresh_all(APR_OC_REASON_RUNNING);
+ }
+ else
+#endif
+ if (rv == WAIT_FAILED) {
+ /* Something serious is wrong */
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(),
+ ap_server_conf, APLOGNO(00356)
+ "Child: WAIT_FAILED -- shutting down server");
+ /* check handle validity to identify a possible culprit */
+ for (i = 0; i < num_events; i++) {
+ DWORD out_flags;
+
+ if (0 == GetHandleInformation(child_events[i], &out_flags)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(),
+ ap_server_conf, APLOGNO(02644)
+ "Child: Event handle #%d (%pp) is invalid",
+ i, child_events[i]);
+ }
+ }
+ break;
+ }
+ else if (cld == 0) {
+ /* Exit event was signaled */
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00357)
+ "Child: Exit event signaled. Child process is "
+ "ending.");
+ break;
+ }
+ else if (cld == 2) {
+ /* The parent is dead. Shutdown the child process. */
+ ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(02538)
+ "Child: Parent process exited abruptly. Child process "
+ "is ending");
+ break;
+ }
+ else {
+ /* MaxConnectionsPerChild event set by the worker threads.
+ * Signal the parent to restart
+ */
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00358)
+ "Child: Process exiting because it reached "
+ "MaxConnectionsPerChild. Signaling the parent to "
+ "restart a new child process.");
+ ap_signal_parent(SIGNAL_PARENT_RESTART);
+ break;
+ }
+ }
+
+ /*
+ * Time to shutdown the child process
+ */
+
+ shutdown:
+
+ winnt_mpm_state = AP_MPMQ_STOPPING;
+
+ /* Close the listening sockets. Note, we must close the listeners
+ * before closing any accept sockets pending in AcceptEx to prevent
+ * memory leaks in the kernel.
+ */
+ for (lr = ap_listeners; lr ; lr = lr->next) {
+ apr_socket_close(lr->sd);
+ }
+
+ /* Shutdown listener threads and pending AcceptEx sockets
+ * but allow the worker threads to continue consuming from
+ * the queue of accepted connections.
+ */
+ shutdown_in_progress = 1;
+
+ Sleep(1000);
+
+ /* Tell the worker threads to exit */
+ workers_may_exit = 1;
+
+ /* Release the start_mutex to let the new process (in the restart
+ * scenario) a chance to begin accepting and servicing requests
+ */
+ rv = apr_proc_mutex_unlock(start_mutex);
+ if (rv == APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO(00359)
+ "Child: Released the start mutex");
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00360)
+ "Child: Failure releasing the start mutex");
+ }
+
+ /* Shutdown the worker threads
+ * Post worker threads blocked on the ThreadDispatch IOCompletion port
+ */
+ while (g_blocked_threads > 0) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00361)
+ "Child: %d threads blocked on the completion port",
+ g_blocked_threads);
+ for (i=g_blocked_threads; i > 0; i--) {
+ PostQueuedCompletionStatus(ThreadDispatchIOCP, 0,
+ IOCP_SHUTDOWN, NULL);
+ }
+ Sleep(1000);
+ }
+ /* Empty the accept queue of completion contexts */
+ apr_thread_mutex_lock(qlock);
+ while (qhead) {
+ CloseHandle(qhead->overlapped.hEvent);
+ closesocket(qhead->accept_socket);
+ qhead = qhead->next;
+ }
+ apr_thread_mutex_unlock(qlock);
+
+ /* Give busy threads a chance to service their connections
+ * (no more than the global server timeout period which
+ * we track in msec remaining).
+ */
+ watch_thread = 0;
+ time_remains = (int)(ap_server_conf->timeout / APR_TIME_C(1000));
+
+ while (threads_created)
+ {
+ int nFailsafe = MAXIMUM_WAIT_OBJECTS;
+ DWORD dwRet;
+
+ /* Every time we roll over to wait on the first group
+ * of MAXIMUM_WAIT_OBJECTS threads, take a breather,
+ * and infrequently update the error log.
+ */
+ if (watch_thread >= threads_created) {
+ if ((time_remains -= 100) < 0)
+ break;
+
+ /* Every 30 seconds give an update */
+ if ((time_remains % 30000) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS,
+ ap_server_conf, APLOGNO(00362)
+ "Child: Waiting %d more seconds "
+ "for %d worker threads to finish.",
+ time_remains / 1000, threads_created);
+ }
+ /* We'll poll from the top, 10 times per second */
+ Sleep(100);
+ watch_thread = 0;
+ }
+
+ /* Fairness, on each iteration we will pick up with the thread
+ * after the one we just removed, even if it's a single thread.
+ * We don't block here.
+ */
+ dwRet = WaitForMultipleObjects(min(threads_created - watch_thread,
+ MAXIMUM_WAIT_OBJECTS),
+ child_handles + watch_thread, 0, 0);
+
+ if (dwRet == WAIT_FAILED) {
+ break;
+ }
+ if (dwRet == WAIT_TIMEOUT) {
+ /* none ready */
+ watch_thread += MAXIMUM_WAIT_OBJECTS;
+ continue;
+ }
+ else if (dwRet >= WAIT_ABANDONED_0) {
+ /* We just got the ownership of the object, which
+ * should happen at most MAXIMUM_WAIT_OBJECTS times.
+ * It does NOT mean that the object is signaled.
+ */
+ if ((nFailsafe--) < 1)
+ break;
+ }
+ else {
+ watch_thread += (dwRet - WAIT_OBJECT_0);
+ if (watch_thread >= threads_created)
+ break;
+ cleanup_thread(child_handles, &threads_created, watch_thread);
+ }
+ }
+
+ /* Kill remaining threads off the hard way */
+ if (threads_created) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00363)
+ "Child: Terminating %d threads that failed to exit.",
+ threads_created);
+ }
+ for (i = 0; i < threads_created; i++) {
+ int *idx;
+ TerminateThread(child_handles[i], 1);
+ CloseHandle(child_handles[i]);
+ /* Reset the scoreboard entry for the thread we just whacked */
+ idx = apr_hash_get(ht, &child_handles[i], sizeof(HANDLE));
+ if (idx) {
+ ap_update_child_status_from_indexes(0, *idx, SERVER_DEAD, NULL);
+ }
+ }
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00364)
+ "Child: All worker threads have exited.");
+
+ apr_thread_mutex_destroy(child_lock);
+ apr_thread_mutex_destroy(qlock);
+ CloseHandle(qwait_event);
+ CloseHandle(ThreadDispatchIOCP);
+
+ apr_pool_destroy(pchild);
+ CloseHandle(exit_event);
+ if (child_events[2] != NULL) {
+ CloseHandle(child_events[2]);
+ }
+}
+
+#endif /* def WIN32 */
diff --git a/server/mpm/winnt/config.m4 b/server/mpm/winnt/config.m4
new file mode 100644
index 0000000..5c1fd42
--- /dev/null
+++ b/server/mpm/winnt/config.m4
@@ -0,0 +1,10 @@
+AC_MSG_CHECKING(if WinNT MPM supports this platform)
+case $host in
+ *mingw32*)
+ AC_MSG_RESULT(yes)
+ APACHE_MPM_SUPPORTED(winnt, no, yes)
+ ;;
+ *)
+ AC_MSG_RESULT(no)
+ ;;
+esac
diff --git a/server/mpm/winnt/config3.m4 b/server/mpm/winnt/config3.m4
new file mode 100644
index 0000000..f937e40
--- /dev/null
+++ b/server/mpm/winnt/config3.m4
@@ -0,0 +1,2 @@
+winnt_objects="child.lo mpm_winnt.lo nt_eventlog.lo service.lo"
+APACHE_MPM_MODULE(winnt, $enable_mpm_winnt, $winnt_objects)
diff --git a/server/mpm/winnt/mpm_default.h b/server/mpm/winnt/mpm_default.h
new file mode 100644
index 0000000..b5350d4
--- /dev/null
+++ b/server/mpm/winnt/mpm_default.h
@@ -0,0 +1,60 @@
+/* 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 winnt/mpm_default.h
+ * @brief win32 MPM defaults
+ *
+ * @defgroup APACHE_MPM_WINNT WinNT MPM
+ * @ingroup APACHE_INTERNAL
+ * @{
+ */
+
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Default limit on the maximum setting of the ThreadsPerChild configuration
+ * directive. This limit can be overridden with the ThreadLimit directive.
+ * This limit directly influences the amount of shared storage that is allocated
+ * for the scoreboard. DEFAULT_THREAD_LIMIT represents a good compromise
+ * between scoreboard size and the ability of the server to handle the most
+ * common installation requirements.
+ */
+#ifndef DEFAULT_THREAD_LIMIT
+#define DEFAULT_THREAD_LIMIT 1920
+#endif
+
+/* The ThreadLimit directive can be used to override the DEFAULT_THREAD_LIMIT.
+ * ThreadLimit cannot be tuned larger than MAX_THREAD_LIMIT.
+ * This is a sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_THREAD_LIMIT
+#define MAX_THREAD_LIMIT 15000
+#endif
+
+/* Number of threads started in the child process in the absence
+ * of a ThreadsPerChild configuration directive
+ */
+#ifndef DEFAULT_THREADS_PER_CHILD
+#define DEFAULT_THREADS_PER_CHILD 64
+#endif
+
+/* Max number of child processes allowed.
+ */
+#define HARD_SERVER_LIMIT 1
+
+#endif /* AP_MPM_DEFAULT_H */
+/** @} */
diff --git a/server/mpm/winnt/mpm_winnt.c b/server/mpm/winnt/mpm_winnt.c
new file mode 100644
index 0000000..1b8962e
--- /dev/null
+++ b/server/mpm/winnt/mpm_winnt.c
@@ -0,0 +1,1783 @@
+/* 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.
+ */
+
+#ifdef WIN32
+
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h" /* for read_config */
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "apr_portable.h"
+#include "apr_thread_proc.h"
+#include "apr_getopt.h"
+#include "apr_strings.h"
+#include "apr_lib.h"
+#include "apr_shm.h"
+#include "apr_thread_mutex.h"
+#include "ap_mpm.h"
+#include "apr_general.h"
+#include "ap_config.h"
+#include "ap_listen.h"
+#include "mpm_default.h"
+#include "mpm_winnt.h"
+#include "mpm_common.h"
+#include <malloc.h>
+#include "apr_atomic.h"
+#include "scoreboard.h"
+
+#ifdef __WATCOMC__
+#define _environ environ
+#endif
+
+#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION /* missing on MinGW */
+#define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
+#endif
+
+/* Because ap_setup_listeners() is skipped in the child, any merging
+ * of [::]:80 and 0.0.0.0:80 for AP_ENABLE_V4_MAPPED in the parent
+ * won't have taken place in the child, so the child will expect to
+ * read two sockets for "Listen 80" but the parent will send only
+ * one.
+ */
+#ifdef AP_ENABLE_V4_MAPPED
+#error The WinNT MPM does not currently support AP_ENABLE_V4_MAPPED
+#endif
+
+/* scoreboard.c does the heavy lifting; all we do is create the child
+ * score by moving a handle down the pipe into the child's stdin.
+ */
+extern apr_shm_t *ap_scoreboard_shm;
+
+/* my_generation is returned to the scoreboard code */
+static volatile ap_generation_t my_generation=0;
+
+/* Definitions of WINNT MPM specific config globals */
+static HANDLE shutdown_event; /* used to signal the parent to shutdown */
+static HANDLE restart_event; /* used to signal the parent to restart */
+
+static int one_process = 0;
+static char const* signal_arg = NULL;
+
+OSVERSIONINFO osver; /* VER_PLATFORM_WIN32_NT */
+
+/* set by child_main to STACK_SIZE_PARAM_IS_A_RESERVATION for NT >= 5.1 (XP/2003) */
+DWORD stack_res_flag;
+
+static DWORD parent_pid;
+DWORD my_pid;
+
+/* used by parent to signal the child to start and exit */
+apr_proc_mutex_t *start_mutex;
+HANDLE exit_event;
+
+int ap_threads_per_child = 0;
+static int thread_limit = 0;
+static int first_thread_limit = 0;
+int winnt_mpm_state = AP_MPMQ_STARTING;
+
+/* shared by service.c as global, although
+ * perhaps it should be private.
+ */
+apr_pool_t *pconf;
+
+/* Only one of these, the pipe from our parent, meant only for
+ * one child worker's consumption (not to be inherited!)
+ * XXX: decorate this name for the trunk branch, was left simplified
+ * only to make the 2.2 patch trivial to read.
+ */
+static HANDLE pipe;
+
+/*
+ * Command processors
+ */
+
+static const char *set_threads_per_child (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_per_child = atoi(arg);
+ return NULL;
+}
+static const char *set_thread_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ thread_limit = atoi(arg);
+ return NULL;
+}
+
+static const command_rec winnt_cmds[] = {
+LISTEN_COMMANDS,
+AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
+ "Number of threads each child creates" ),
+AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF,
+ "Maximum worker threads in a server for this run of Apache"),
+{ NULL }
+};
+
+static void winnt_note_child_started(int slot, pid_t pid)
+{
+ ap_scoreboard_image->parent[slot].pid = pid;
+ ap_scoreboard_image->parent[slot].generation = my_generation;
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[slot].pid,
+ my_generation, slot, MPM_CHILD_STARTED);
+}
+
+static void winnt_note_child_killed(int slot)
+{
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[slot].pid,
+ ap_scoreboard_image->parent[slot].generation,
+ slot, MPM_CHILD_EXITED);
+ ap_scoreboard_image->parent[slot].pid = 0;
+}
+
+/*
+ * Signalling Apache on NT.
+ *
+ * Under Unix, Apache can be told to shutdown or restart by sending various
+ * signals (HUP, USR, TERM). On NT we don't have easy access to signals, so
+ * we use "events" instead. The parent apache process goes into a loop
+ * where it waits forever for a set of events. Two of those events are
+ * called
+ *
+ * apPID_shutdown
+ * apPID_restart
+ *
+ * (where PID is the PID of the apache parent process). When one of these
+ * is signalled, the Apache parent performs the appropriate action. The events
+ * can become signalled through internal Apache methods (e.g. if the child
+ * finds a fatal error and needs to kill its parent), via the service
+ * control manager (the control thread will signal the shutdown event when
+ * requested to stop the Apache service), from the -k Apache command line,
+ * or from any external program which finds the Apache PID from the
+ * httpd.pid file.
+ *
+ * The signal_parent() function, below, is used to signal one of these events.
+ * It can be called by any child or parent process, since it does not
+ * rely on global variables.
+ *
+ * On entry, type gives the event to signal. 0 means shutdown, 1 means
+ * graceful restart.
+ */
+/*
+ * Initialise the signal names, in the global variables signal_name_prefix,
+ * signal_restart_name and signal_shutdown_name.
+ */
+#define MAX_SIGNAL_NAME 30 /* Long enough for apPID_shutdown, where PID is an int */
+static char signal_name_prefix[MAX_SIGNAL_NAME];
+static char signal_restart_name[MAX_SIGNAL_NAME];
+static char signal_shutdown_name[MAX_SIGNAL_NAME];
+static void setup_signal_names(char *prefix)
+{
+ apr_snprintf(signal_name_prefix, sizeof(signal_name_prefix), prefix);
+ apr_snprintf(signal_shutdown_name, sizeof(signal_shutdown_name),
+ "%s_shutdown", signal_name_prefix);
+ apr_snprintf(signal_restart_name, sizeof(signal_restart_name),
+ "%s_restart", signal_name_prefix);
+}
+
+AP_DECLARE(void) ap_signal_parent(ap_signal_parent_e type)
+{
+ HANDLE e;
+ char *signal_name;
+
+ if (parent_pid == my_pid) {
+ switch(type) {
+ case SIGNAL_PARENT_SHUTDOWN:
+ {
+ SetEvent(shutdown_event);
+ break;
+ }
+ /* This MPM supports only graceful restarts right now */
+ case SIGNAL_PARENT_RESTART:
+ case SIGNAL_PARENT_RESTART_GRACEFUL:
+ {
+ SetEvent(restart_event);
+ break;
+ }
+ }
+ return;
+ }
+
+ switch(type) {
+ case SIGNAL_PARENT_SHUTDOWN:
+ {
+ signal_name = signal_shutdown_name;
+ break;
+ }
+ /* This MPM supports only graceful restarts right now */
+ case SIGNAL_PARENT_RESTART:
+ case SIGNAL_PARENT_RESTART_GRACEFUL:
+ {
+ signal_name = signal_restart_name;
+ break;
+ }
+ default:
+ return;
+ }
+
+ e = OpenEvent(EVENT_MODIFY_STATE, FALSE, signal_name);
+ if (!e) {
+ /* Um, problem, can't signal the parent, which means we can't
+ * signal ourselves to die. Ignore for now...
+ */
+ ap_log_error(APLOG_MARK, APLOG_EMERG, apr_get_os_error(), ap_server_conf, APLOGNO(00382)
+ "OpenEvent on %s event", signal_name);
+ return;
+ }
+ if (SetEvent(e) == 0) {
+ /* Same problem as above */
+ ap_log_error(APLOG_MARK, APLOG_EMERG, apr_get_os_error(), ap_server_conf, APLOGNO(00383)
+ "SetEvent on %s event", signal_name);
+ CloseHandle(e);
+ return;
+ }
+ CloseHandle(e);
+}
+
+
+/*
+ * Passed the following handles [in sync with send_handles_to_child()]
+ *
+ * ready event [signal the parent immediately, then close]
+ * exit event [save to poll later]
+ * start mutex [signal from the parent to begin accept()]
+ * scoreboard shm handle [to recreate the ap_scoreboard]
+ */
+static void get_handles_from_parent(server_rec *s, HANDLE *child_exit_event,
+ apr_proc_mutex_t **child_start_mutex,
+ apr_shm_t **scoreboard_shm)
+{
+ HANDLE hScore;
+ HANDLE ready_event;
+ HANDLE os_start;
+ DWORD BytesRead;
+ void *sb_shared;
+ apr_status_t rv;
+
+ /* *** We now do this way back in winnt_rewrite_args
+ * pipe = GetStdHandle(STD_INPUT_HANDLE);
+ */
+ if (!ReadFile(pipe, &ready_event, sizeof(HANDLE),
+ &BytesRead, (LPOVERLAPPED) NULL)
+ || (BytesRead != sizeof(HANDLE))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00384)
+ "Child: Unable to retrieve the ready event from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ SetEvent(ready_event);
+ CloseHandle(ready_event);
+
+ if (!ReadFile(pipe, child_exit_event, sizeof(HANDLE),
+ &BytesRead, (LPOVERLAPPED) NULL)
+ || (BytesRead != sizeof(HANDLE))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00385)
+ "Child: Unable to retrieve the exit event from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ if (!ReadFile(pipe, &os_start, sizeof(os_start),
+ &BytesRead, (LPOVERLAPPED) NULL)
+ || (BytesRead != sizeof(os_start))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00386)
+ "Child: Unable to retrieve the start_mutex from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+ *child_start_mutex = NULL;
+ if ((rv = apr_os_proc_mutex_put(child_start_mutex, &os_start, s->process->pool))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00387)
+ "Child: Unable to access the start_mutex from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ if (!ReadFile(pipe, &hScore, sizeof(hScore),
+ &BytesRead, (LPOVERLAPPED) NULL)
+ || (BytesRead != sizeof(hScore))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00388)
+ "Child: Unable to retrieve the scoreboard from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+ *scoreboard_shm = NULL;
+ if ((rv = apr_os_shm_put(scoreboard_shm, &hScore, s->process->pool))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00389)
+ "Child: Unable to access the scoreboard from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ rv = ap_reopen_scoreboard(s->process->pool, scoreboard_shm, 1);
+ if (rv || !(sb_shared = apr_shm_baseaddr_get(*scoreboard_shm))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00390)
+ "Child: Unable to reopen the scoreboard from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+ /* We must 'initialize' the scoreboard to relink all the
+ * process-local pointer arrays into the shared memory block.
+ */
+ ap_init_scoreboard(sb_shared);
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00391)
+ "Child: Retrieved our scoreboard from the parent.");
+}
+
+
+static int send_handles_to_child(apr_pool_t *p,
+ HANDLE child_ready_event,
+ HANDLE child_exit_event,
+ apr_proc_mutex_t *child_start_mutex,
+ apr_shm_t *scoreboard_shm,
+ HANDLE hProcess,
+ apr_file_t *child_in)
+{
+ apr_status_t rv;
+ HANDLE hCurrentProcess = GetCurrentProcess();
+ HANDLE hDup;
+ HANDLE os_start;
+ HANDLE hScore;
+ apr_size_t BytesWritten;
+
+ if ((rv = apr_file_write_full(child_in, &my_generation,
+ sizeof(my_generation), NULL))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(02964)
+ "Parent: Unable to send its generation to the child");
+ return -1;
+ }
+ if (!DuplicateHandle(hCurrentProcess, child_ready_event, hProcess, &hDup,
+ EVENT_MODIFY_STATE | SYNCHRONIZE, FALSE, 0)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00392)
+ "Parent: Unable to duplicate the ready event handle for the child");
+ return -1;
+ }
+ if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00393)
+ "Parent: Unable to send the exit event handle to the child");
+ return -1;
+ }
+ if (!DuplicateHandle(hCurrentProcess, child_exit_event, hProcess, &hDup,
+ EVENT_MODIFY_STATE | SYNCHRONIZE, FALSE, 0)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00394)
+ "Parent: Unable to duplicate the exit event handle for the child");
+ return -1;
+ }
+ if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00395)
+ "Parent: Unable to send the exit event handle to the child");
+ return -1;
+ }
+ if ((rv = apr_os_proc_mutex_get(&os_start, child_start_mutex)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00396)
+ "Parent: Unable to retrieve the start mutex for the child");
+ return -1;
+ }
+ if (!DuplicateHandle(hCurrentProcess, os_start, hProcess, &hDup,
+ SYNCHRONIZE, FALSE, 0)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00397)
+ "Parent: Unable to duplicate the start mutex to the child");
+ return -1;
+ }
+ if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00398)
+ "Parent: Unable to send the start mutex to the child");
+ return -1;
+ }
+ if ((rv = apr_os_shm_get(&hScore, scoreboard_shm)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00399)
+ "Parent: Unable to retrieve the scoreboard handle for the child");
+ return -1;
+ }
+ if (!DuplicateHandle(hCurrentProcess, hScore, hProcess, &hDup,
+ FILE_MAP_READ | FILE_MAP_WRITE, FALSE, 0)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00400)
+ "Parent: Unable to duplicate the scoreboard handle to the child");
+ return -1;
+ }
+ if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00401)
+ "Parent: Unable to send the scoreboard handle to the child");
+ return -1;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00402)
+ "Parent: Sent the scoreboard to the child");
+ return 0;
+}
+
+
+/*
+ * get_listeners_from_parent()
+ * The listen sockets are opened in the parent. This function, which runs
+ * exclusively in the child process, receives them from the parent and
+ * makes them available in the child.
+ */
+static void get_listeners_from_parent(server_rec *s)
+{
+ WSAPROTOCOL_INFO WSAProtocolInfo;
+ ap_listen_rec *lr;
+ DWORD BytesRead;
+ int lcnt = 0;
+ SOCKET nsd;
+
+ /* Set up a default listener if necessary */
+ if (ap_listeners == NULL) {
+ ap_listen_rec *lr;
+ lr = apr_palloc(s->process->pool, sizeof(ap_listen_rec));
+ lr->sd = NULL;
+ lr->next = ap_listeners;
+ ap_listeners = lr;
+ }
+
+ /* Open the pipe to the parent process to receive the inherited socket
+ * data. The sockets have been set to listening in the parent process.
+ *
+ * *** We now do this way back in winnt_rewrite_args
+ * pipe = GetStdHandle(STD_INPUT_HANDLE);
+ */
+ for (lr = ap_listeners; lr; lr = lr->next, ++lcnt) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00403)
+ "Child: Waiting for data for listening socket %pI",
+ lr->bind_addr);
+ if (!ReadFile(pipe, &WSAProtocolInfo, sizeof(WSAPROTOCOL_INFO),
+ &BytesRead, (LPOVERLAPPED) NULL)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00404)
+ "Child: Unable to read socket data from parent");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ nsd = WSASocket(FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO,
+ &WSAProtocolInfo, 0, 0);
+ if (nsd == INVALID_SOCKET) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_netos_error(), ap_server_conf, APLOGNO(00405)
+ "Child: WSASocket failed to open the inherited socket");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ if (!SetHandleInformation((HANDLE)nsd, HANDLE_FLAG_INHERIT, 0)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), ap_server_conf, APLOGNO(00406)
+ "Child: SetHandleInformation failed");
+ }
+ apr_os_sock_put(&lr->sd, &nsd, s->process->pool);
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00407)
+ "Child: retrieved %d listeners from parent", lcnt);
+}
+
+
+static int send_listeners_to_child(apr_pool_t *p, DWORD dwProcessId,
+ apr_file_t *child_in)
+{
+ apr_status_t rv;
+ int lcnt = 0;
+ ap_listen_rec *lr;
+ LPWSAPROTOCOL_INFO lpWSAProtocolInfo;
+ apr_size_t BytesWritten;
+
+ /* Run the chain of open sockets. For each socket, duplicate it
+ * for the target process then send the WSAPROTOCOL_INFO
+ * (returned by dup socket) to the child.
+ */
+ for (lr = ap_listeners; lr; lr = lr->next, ++lcnt) {
+ apr_os_sock_t nsd;
+ lpWSAProtocolInfo = apr_pcalloc(p, sizeof(WSAPROTOCOL_INFO));
+ apr_os_sock_get(&nsd, lr->sd);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00408)
+ "Parent: Duplicating socket %d (%pI) and sending it to child process %lu",
+ nsd, lr->bind_addr, dwProcessId);
+ if (WSADuplicateSocket(nsd, dwProcessId,
+ lpWSAProtocolInfo) == SOCKET_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_netos_error(), ap_server_conf, APLOGNO(00409)
+ "Parent: WSADuplicateSocket failed for socket %d. Check the FAQ.", nsd);
+ return -1;
+ }
+
+ if ((rv = apr_file_write_full(child_in, lpWSAProtocolInfo,
+ sizeof(WSAPROTOCOL_INFO), &BytesWritten))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00410)
+ "Parent: Unable to write duplicated socket %d to the child.", nsd);
+ return -1;
+ }
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00411)
+ "Parent: Sent %d listeners to child %lu", lcnt, dwProcessId);
+ return 0;
+}
+
+enum waitlist_e {
+ waitlist_ready = 0,
+ waitlist_term = 1
+};
+
+static int create_process(apr_pool_t *p, HANDLE *child_proc, HANDLE *child_exit_event,
+ DWORD *child_pid)
+{
+ /* These NEVER change for the lifetime of this parent
+ */
+ static char **args = NULL;
+ static char pidbuf[28];
+
+ apr_status_t rv;
+ apr_pool_t *ptemp;
+ apr_procattr_t *attr;
+ apr_proc_t new_child;
+ HANDLE hExitEvent;
+ HANDLE waitlist[2]; /* see waitlist_e */
+ char *cmd;
+ char *cwd;
+ char **env;
+ int envc;
+
+ apr_pool_create_ex(&ptemp, p, NULL, NULL);
+ apr_pool_tag(ptemp, "create_process");
+
+ /* Build the command line. Should look something like this:
+ * C:/apache/bin/httpd.exe -f ap_server_confname
+ * First, get the path to the executable...
+ */
+ apr_procattr_create(&attr, ptemp);
+ apr_procattr_cmdtype_set(attr, APR_PROGRAM);
+ apr_procattr_detach_set(attr, 1);
+ if (((rv = apr_filepath_get(&cwd, 0, ptemp)) != APR_SUCCESS)
+ || ((rv = apr_procattr_dir_set(attr, cwd)) != APR_SUCCESS)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00412)
+ "Parent: Failed to get the current path");
+ }
+
+ if (!args) {
+ /* Build the args array, only once since it won't change
+ * for the lifetime of this parent process.
+ */
+ if ((rv = ap_os_proc_filepath(&cmd, ptemp))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, ERROR_BAD_PATHNAME, ap_server_conf, APLOGNO(00413)
+ "Parent: Failed to get full path of %s",
+ ap_server_conf->process->argv[0]);
+ apr_pool_destroy(ptemp);
+ return -1;
+ }
+
+ args = ap_malloc((ap_server_conf->process->argc + 1) * sizeof (char*));
+ memcpy(args + 1, ap_server_conf->process->argv + 1,
+ (ap_server_conf->process->argc - 1) * sizeof (char*));
+ args[0] = ap_malloc(strlen(cmd) + 1);
+ strcpy(args[0], cmd);
+ args[ap_server_conf->process->argc] = NULL;
+ }
+ else {
+ cmd = args[0];
+ }
+
+ /* Create a pipe to send handles to the child */
+ if ((rv = apr_procattr_io_set(attr, APR_FULL_BLOCK,
+ APR_NO_PIPE, APR_NO_PIPE)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00414)
+ "Parent: Unable to create child stdin pipe.");
+ apr_pool_destroy(ptemp);
+ return -1;
+ }
+
+ /* Create the child_ready_event */
+ waitlist[waitlist_ready] = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (!waitlist[waitlist_ready]) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00415)
+ "Parent: Could not create ready event for child process");
+ apr_pool_destroy (ptemp);
+ return -1;
+ }
+
+ /* Create the child_exit_event */
+ hExitEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (!hExitEvent) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00416)
+ "Parent: Could not create exit event for child process");
+ apr_pool_destroy(ptemp);
+ CloseHandle(waitlist[waitlist_ready]);
+ return -1;
+ }
+
+ /* Build the env array */
+ for (envc = 0; _environ[envc]; ++envc) {
+ ;
+ }
+ env = apr_palloc(ptemp, (envc + 2) * sizeof (char*));
+ memcpy(env, _environ, envc * sizeof (char*));
+ apr_snprintf(pidbuf, sizeof(pidbuf), "AP_PARENT_PID=%lu", parent_pid);
+ env[envc] = pidbuf;
+ env[envc + 1] = NULL;
+
+ rv = apr_proc_create(&new_child, cmd, (const char * const *)args,
+ (const char * const *)env, attr, ptemp);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00417)
+ "Parent: Failed to create the child process.");
+ apr_pool_destroy(ptemp);
+ CloseHandle(hExitEvent);
+ CloseHandle(waitlist[waitlist_ready]);
+ CloseHandle(new_child.hproc);
+ return -1;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00418)
+ "Parent: Created child process %d", new_child.pid);
+
+ if (send_handles_to_child(ptemp, waitlist[waitlist_ready], hExitEvent,
+ start_mutex, ap_scoreboard_shm,
+ new_child.hproc, new_child.in)) {
+ /*
+ * This error is fatal, mop up the child and move on
+ * We toggle the child's exit event to cause this child
+ * to quit even as it is attempting to start.
+ */
+ SetEvent(hExitEvent);
+ apr_pool_destroy(ptemp);
+ CloseHandle(hExitEvent);
+ CloseHandle(waitlist[waitlist_ready]);
+ CloseHandle(new_child.hproc);
+ return -1;
+ }
+
+ /* Important:
+ * Give the child process a chance to run before dup'ing the sockets.
+ * We have already set the listening sockets noninheritable, but if
+ * WSADuplicateSocket runs before the child process initializes
+ * the listeners will be inherited anyway.
+ */
+ waitlist[waitlist_term] = new_child.hproc;
+ rv = WaitForMultipleObjects(2, waitlist, FALSE, INFINITE);
+ CloseHandle(waitlist[waitlist_ready]);
+ if (rv != WAIT_OBJECT_0) {
+ /*
+ * Outch... that isn't a ready signal. It's dead, Jim!
+ */
+ SetEvent(hExitEvent);
+ apr_pool_destroy(ptemp);
+ CloseHandle(hExitEvent);
+ CloseHandle(new_child.hproc);
+ return -1;
+ }
+
+ if (send_listeners_to_child(ptemp, new_child.pid, new_child.in)) {
+ /*
+ * This error is fatal, mop up the child and move on
+ * We toggle the child's exit event to cause this child
+ * to quit even as it is attempting to start.
+ */
+ SetEvent(hExitEvent);
+ apr_pool_destroy(ptemp);
+ CloseHandle(hExitEvent);
+ CloseHandle(new_child.hproc);
+ return -1;
+ }
+
+ apr_file_close(new_child.in);
+
+ *child_exit_event = hExitEvent;
+ *child_proc = new_child.hproc;
+ *child_pid = new_child.pid;
+
+ return 0;
+}
+
+/***********************************************************************
+ * master_main()
+ * master_main() runs in the parent process. It creates the child
+ * process which handles HTTP requests then waits on one of three
+ * events:
+ *
+ * restart_event
+ * -------------
+ * The restart event causes master_main to start a new child process and
+ * tells the old child process to exit (by setting the child_exit_event).
+ * The restart event is set as a result of one of the following:
+ * 1. An apache -k restart command on the command line
+ * 2. A command received from Windows service manager which gets
+ * translated into an ap_signal_parent(SIGNAL_PARENT_RESTART)
+ * call by code in service.c.
+ * 3. The child process calling ap_signal_parent(SIGNAL_PARENT_RESTART)
+ * as a result of hitting MaxConnectionsPerChild.
+ *
+ * shutdown_event
+ * --------------
+ * The shutdown event causes master_main to tell the child process to
+ * exit and that the server is shutting down. The shutdown event is
+ * set as a result of one of the following:
+ * 1. An apache -k shutdown command on the command line
+ * 2. A command received from Windows service manager which gets
+ * translated into an ap_signal_parent(SIGNAL_PARENT_SHUTDOWN)
+ * call by code in service.c.
+ *
+ * child process handle
+ * --------------------
+ * The child process handle will be signaled if the child process
+ * exits for any reason. In a normal running server, the signaling
+ * of this event means that the child process has exited prematurely
+ * due to a seg fault or other irrecoverable error. For server
+ * robustness, master_main will restart the child process under this
+ * condition.
+ *
+ * master_main uses the child_exit_event to signal the child process
+ * to exit.
+ **********************************************************************/
+#define NUM_WAIT_HANDLES 3
+#define CHILD_HANDLE 0
+#define SHUTDOWN_HANDLE 1
+#define RESTART_HANDLE 2
+static int master_main(server_rec *s, HANDLE shutdown_event, HANDLE restart_event)
+{
+ int rv, cld;
+ int child_created;
+ int restart_pending;
+ int shutdown_pending;
+ HANDLE child_exit_event;
+ HANDLE event_handles[NUM_WAIT_HANDLES];
+ DWORD child_pid;
+
+ child_created = restart_pending = shutdown_pending = 0;
+
+ event_handles[SHUTDOWN_HANDLE] = shutdown_event;
+ event_handles[RESTART_HANDLE] = restart_event;
+
+ /* Create a single child process */
+ rv = create_process(pconf, &event_handles[CHILD_HANDLE],
+ &child_exit_event, &child_pid);
+ if (rv < 0)
+ {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00419)
+ "master_main: create child process failed. Exiting.");
+ shutdown_pending = 1;
+ goto die_now;
+ }
+
+ child_created = 1;
+
+ if (!strcasecmp(signal_arg, "runservice")) {
+ mpm_service_started();
+ }
+
+ /* Update the scoreboard. Note that there is only a single active
+ * child at once.
+ */
+ ap_scoreboard_image->parent[0].quiescing = 0;
+ winnt_note_child_started(/* slot */ 0, child_pid);
+
+ /* Wait for shutdown or restart events or for child death */
+ winnt_mpm_state = AP_MPMQ_RUNNING;
+ rv = WaitForMultipleObjects(NUM_WAIT_HANDLES, (HANDLE *) event_handles, FALSE, INFINITE);
+ cld = rv - WAIT_OBJECT_0;
+ if (rv == WAIT_FAILED) {
+ /* Something serious is wrong */
+ ap_log_error(APLOG_MARK,APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00420)
+ "master_main: WaitForMultipleObjects WAIT_FAILED -- doing server shutdown");
+ shutdown_pending = 1;
+ }
+ else if (rv == WAIT_TIMEOUT) {
+ /* Hey, this cannot happen */
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s, APLOGNO(00421)
+ "master_main: WaitForMultipleObjects with INFINITE wait exited with WAIT_TIMEOUT");
+ shutdown_pending = 1;
+ }
+ else if (cld == SHUTDOWN_HANDLE) {
+ /* shutdown_event signalled */
+ shutdown_pending = 1;
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, s, APLOGNO(00422)
+ "Parent: Received shutdown signal -- Shutting down the server.");
+ if (ResetEvent(shutdown_event) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s, APLOGNO(00423)
+ "ResetEvent(shutdown_event)");
+ }
+ }
+ else if (cld == RESTART_HANDLE) {
+ /* Received a restart event. Prepare the restart_event to be reused
+ * then signal the child process to exit.
+ */
+ restart_pending = 1;
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, APLOGNO(00424)
+ "Parent: Received restart signal -- Restarting the server.");
+ if (ResetEvent(restart_event) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s, APLOGNO(00425)
+ "Parent: ResetEvent(restart_event) failed.");
+ }
+ if (SetEvent(child_exit_event) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s, APLOGNO(00426)
+ "Parent: SetEvent for child process event %pp failed.",
+ event_handles[CHILD_HANDLE]);
+ }
+ /* Don't wait to verify that the child process really exits,
+ * just move on with the restart.
+ */
+ CloseHandle(event_handles[CHILD_HANDLE]);
+ event_handles[CHILD_HANDLE] = NULL;
+ }
+ else {
+ /* The child process exited prematurely due to a fatal error. */
+ DWORD exitcode;
+ if (!GetExitCodeProcess(event_handles[CHILD_HANDLE], &exitcode)) {
+ /* HUH? We did exit, didn't we? */
+ exitcode = APEXIT_CHILDFATAL;
+ }
+ if ( exitcode == APEXIT_CHILDFATAL
+ || exitcode == APEXIT_CHILDINIT
+ || exitcode == APEXIT_INIT) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(00427)
+ "Parent: child process %lu exited with status %lu -- Aborting.",
+ child_pid, exitcode);
+ shutdown_pending = 1;
+ }
+ else {
+ int i;
+ restart_pending = 1;
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00428)
+ "Parent: child process %lu exited with status %lu -- Restarting.",
+ child_pid, exitcode);
+ for (i = 0; i < ap_threads_per_child; i++) {
+ ap_update_child_status_from_indexes(0, i, SERVER_DEAD, NULL);
+ }
+ }
+ CloseHandle(event_handles[CHILD_HANDLE]);
+ event_handles[CHILD_HANDLE] = NULL;
+ }
+
+ winnt_note_child_killed(/* slot */ 0);
+
+ if (restart_pending) {
+ ++my_generation;
+ ap_scoreboard_image->global->running_generation = my_generation;
+ }
+die_now:
+ if (shutdown_pending)
+ {
+ int timeout = 30000; /* Timeout is milliseconds */
+ winnt_mpm_state = AP_MPMQ_STOPPING;
+
+ if (!child_created) {
+ return 0; /* Tell the caller we do not want to restart */
+ }
+
+ /* This shutdown is only marginally graceful. We will give the
+ * child a bit of time to exit gracefully. If the time expires,
+ * the child will be wacked.
+ */
+ if (!strcasecmp(signal_arg, "runservice")) {
+ mpm_service_stopping();
+ }
+ /* Signal the child processes to exit */
+ if (SetEvent(child_exit_event) == 0) {
+ ap_log_error(APLOG_MARK,APLOG_ERR, apr_get_os_error(), ap_server_conf, APLOGNO(00429)
+ "Parent: SetEvent for child process event %pp failed",
+ event_handles[CHILD_HANDLE]);
+ }
+ if (event_handles[CHILD_HANDLE]) {
+ rv = WaitForSingleObject(event_handles[CHILD_HANDLE], timeout);
+ if (rv == WAIT_OBJECT_0) {
+ ap_log_error(APLOG_MARK,APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00430)
+ "Parent: Child process %lu exited successfully.", child_pid);
+ CloseHandle(event_handles[CHILD_HANDLE]);
+ event_handles[CHILD_HANDLE] = NULL;
+ }
+ else {
+ ap_log_error(APLOG_MARK,APLOG_NOTICE, APR_SUCCESS, ap_server_conf, APLOGNO(00431)
+ "Parent: Forcing termination of child process %lu",
+ child_pid);
+ TerminateProcess(event_handles[CHILD_HANDLE], 1);
+ CloseHandle(event_handles[CHILD_HANDLE]);
+ event_handles[CHILD_HANDLE] = NULL;
+ }
+ }
+ CloseHandle(child_exit_event);
+ return 0; /* Tell the caller we do not want to restart */
+ }
+ winnt_mpm_state = AP_MPMQ_STARTING;
+ CloseHandle(child_exit_event);
+ return 1; /* Tell the caller we want a restart */
+}
+
+/* service_nt_main_fn needs to append the StartService() args
+ * outside of our call stack and thread as the service starts...
+ */
+apr_array_header_t *mpm_new_argv;
+
+/* Remember service_to_start failures to log and fail in pre_config.
+ * Remember inst_argc and inst_argv for installing or starting the
+ * service after we preflight the config.
+ */
+
+static int winnt_query(int query_code, int *result, apr_status_t *rv)
+{
+ *rv = APR_SUCCESS;
+ switch (query_code) {
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = MAXIMUM_WAIT_OBJECTS;
+ break;
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_STATIC;
+ break;
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_NOT_SUPPORTED;
+ break;
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = HARD_SERVER_LIMIT;
+ break;
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = thread_limit;
+ break;
+ case AP_MPMQ_MAX_THREADS:
+ *result = ap_threads_per_child;
+ break;
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MIN_SPARE_THREADS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_THREADS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = ap_max_requests_per_child;
+ break;
+ case AP_MPMQ_MAX_DAEMONS:
+ *result = 1;
+ break;
+ case AP_MPMQ_MPM_STATE:
+ *result = winnt_mpm_state;
+ break;
+ case AP_MPMQ_GENERATION:
+ *result = my_generation;
+ break;
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+ return OK;
+}
+
+static const char *winnt_get_name(void)
+{
+ return "WinNT";
+}
+
+#define SERVICE_UNSET (-1)
+static apr_status_t service_set = SERVICE_UNSET;
+static apr_status_t service_to_start_success;
+static int inst_argc;
+static const char * const *inst_argv;
+static const char *service_name = NULL;
+
+static void winnt_rewrite_args(process_rec *process)
+{
+ /* Handle the following SCM aspects in this phase:
+ *
+ * -k runservice [transition in service context only]
+ * -k install
+ * -k config
+ * -k uninstall
+ * -k stop
+ * -k shutdown (same as -k stop). Maintained for backward compatibility.
+ *
+ * We can't leave this phase until we know our identity
+ * and modify the command arguments appropriately.
+ *
+ * We do not care if the .conf file exists or is parsable when
+ * attempting to stop or uninstall a service.
+ */
+ apr_status_t rv;
+ char *def_server_root;
+ char *binpath;
+ char optbuf[3];
+ const char *opt_arg;
+ int fixed_args;
+ char *pid;
+ apr_getopt_t *opt;
+ int running_as_service = 1;
+ int errout = 0;
+ apr_file_t *nullfile;
+
+ pconf = process->pconf;
+
+ osver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+ GetVersionEx(&osver);
+
+ /* We wish this was *always* a reservation, but sadly it wasn't so and
+ * we couldn't break a hard limit prior to NT Kernel 5.1
+ */
+ if (osver.dwPlatformId == VER_PLATFORM_WIN32_NT
+ && ((osver.dwMajorVersion > 5)
+ || ((osver.dwMajorVersion == 5) && (osver.dwMinorVersion > 0)))) {
+ stack_res_flag = STACK_SIZE_PARAM_IS_A_RESERVATION;
+ }
+
+ /* AP_PARENT_PID is only valid in the child */
+ pid = getenv("AP_PARENT_PID");
+ if (pid)
+ {
+ HANDLE filehand;
+ HANDLE hproc = GetCurrentProcess();
+ DWORD BytesRead;
+
+ /* This is the child */
+ my_pid = GetCurrentProcessId();
+ parent_pid = (DWORD) atol(pid);
+
+ /* Prevent holding open the (nonexistent) console */
+ ap_real_exit_code = 0;
+
+ /* The parent gave us stdin, we need to remember this
+ * handle, and no longer inherit it at our children
+ * (we can't slurp it up now, we just aren't ready yet).
+ * The original handle is closed below, at apr_file_dup2()
+ */
+ pipe = GetStdHandle(STD_INPUT_HANDLE);
+ if (DuplicateHandle(hproc, pipe,
+ hproc, &filehand, 0, FALSE,
+ DUPLICATE_SAME_ACCESS)) {
+ pipe = filehand;
+ }
+
+ /* The parent gave us stdout of the NUL device,
+ * and expects us to suck up stdin of all of our
+ * shared handles and data from the parent.
+ * Don't infect child processes with our stdin
+ * handle, use another handle to NUL!
+ */
+ {
+ apr_file_t *infile, *outfile;
+ if ((apr_file_open_stdout(&outfile, process->pool) == APR_SUCCESS)
+ && (apr_file_open_stdin(&infile, process->pool) == APR_SUCCESS))
+ apr_file_dup2(infile, outfile, process->pool);
+ }
+
+ /* This child needs the existing stderr opened for logging,
+ * already
+ */
+
+ /* Read this child's generation number as soon as now,
+ * so that further hooks can query it.
+ */
+ if (!ReadFile(pipe, &my_generation, sizeof(my_generation),
+ &BytesRead, (LPOVERLAPPED) NULL)
+ || (BytesRead != sizeof(my_generation))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), NULL, APLOGNO(02965)
+ "Child: Unable to retrieve my generation from the parent");
+ exit(APEXIT_CHILDINIT);
+ }
+
+ /* The parent is responsible for providing the
+ * COMPLETE ARGUMENTS REQUIRED to the child.
+ *
+ * No further argument parsing is needed, but
+ * for good measure we will provide a simple
+ * signal string for later testing.
+ */
+ signal_arg = "runchild";
+ return;
+ }
+
+ /* This is the parent, we have a long way to go :-) */
+ parent_pid = my_pid = GetCurrentProcessId();
+
+ /* This behavior is voided by setting real_exit_code to 0 */
+ atexit(hold_console_open_on_error);
+
+ /* Rewrite process->argv[];
+ *
+ * strip out -k signal into signal_arg
+ * strip out -n servicename and set the names
+ * add default -d serverroot from the path of this executable
+ *
+ * The end result will look like:
+ *
+ * The invocation command (%0)
+ * The -d serverroot default from the running executable
+ * The requested service's (-n) registry ConfigArgs
+ * The WinNT SCM's StartService() args
+ */
+ if ((rv = ap_os_proc_filepath(&binpath, process->pconf))
+ != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK,APLOG_CRIT, rv, NULL, APLOGNO(00432)
+ "Failed to get the full path of %s", process->argv[0]);
+ exit(APEXIT_INIT);
+ }
+ /* WARNING: There is an implicit assumption here that the
+ * executable resides in ServerRoot or ServerRoot\bin
+ */
+ def_server_root = (char *) apr_filepath_name_get(binpath);
+ if (def_server_root > binpath) {
+ *(def_server_root - 1) = '\0';
+ def_server_root = (char *) apr_filepath_name_get(binpath);
+ if (!strcasecmp(def_server_root, "bin"))
+ *(def_server_root - 1) = '\0';
+ }
+ apr_filepath_merge(&def_server_root, NULL, binpath,
+ APR_FILEPATH_TRUENAME, process->pool);
+
+ /* Use process->pool so that the rewritten argv
+ * lasts for the lifetime of the server process,
+ * because pconf will be destroyed after the
+ * initial pre-flight of the config parser.
+ */
+ mpm_new_argv = apr_array_make(process->pool, process->argc + 2,
+ sizeof(const char *));
+ *(const char **)apr_array_push(mpm_new_argv) = process->argv[0];
+ *(const char **)apr_array_push(mpm_new_argv) = "-d";
+ *(const char **)apr_array_push(mpm_new_argv) = def_server_root;
+
+ fixed_args = mpm_new_argv->nelts;
+
+ optbuf[0] = '-';
+ optbuf[2] = '\0';
+ apr_getopt_init(&opt, process->pool, process->argc, process->argv);
+ opt->errfn = NULL;
+ while ((rv = apr_getopt(opt, "wn:k:" AP_SERVER_BASEARGS,
+ optbuf + 1, &opt_arg)) == APR_SUCCESS) {
+ switch (optbuf[1]) {
+
+ /* Shortcuts; include the -w option to hold the window open on error.
+ * This must not be toggled once we reset ap_real_exit_code to 0!
+ */
+ case 'w':
+ if (ap_real_exit_code)
+ ap_real_exit_code = 2;
+ break;
+
+ case 'n':
+ service_set = mpm_service_set_name(process->pool, &service_name,
+ opt_arg);
+ break;
+
+ case 'k':
+ signal_arg = opt_arg;
+ break;
+
+ case 'E':
+ errout = 1;
+ /* Fall through so the Apache main() handles the 'E' arg */
+ default:
+ *(const char **)apr_array_push(mpm_new_argv) =
+ apr_pstrdup(process->pool, optbuf);
+
+ if (opt_arg) {
+ *(const char **)apr_array_push(mpm_new_argv) = opt_arg;
+ }
+ break;
+ }
+ }
+
+ /* back up to capture the bad argument */
+ if (rv == APR_BADCH || rv == APR_BADARG) {
+ opt->ind--;
+ }
+
+ while (opt->ind < opt->argc) {
+ *(const char **)apr_array_push(mpm_new_argv) =
+ apr_pstrdup(process->pool, opt->argv[opt->ind++]);
+ }
+
+ /* Track the number of args actually entered by the user */
+ inst_argc = mpm_new_argv->nelts - fixed_args;
+
+ /* Provide a default 'run' -k arg to simplify signal_arg tests */
+ if (!signal_arg)
+ {
+ signal_arg = "run";
+ running_as_service = 0;
+ }
+
+ if (!strcasecmp(signal_arg, "runservice"))
+ {
+ /* Start the NT Service _NOW_ because the WinNT SCM is
+ * expecting us to rapidly assume control of our own
+ * process, the SCM will tell us our service name, and
+ * may have extra StartService() command arguments to
+ * add for us.
+ *
+ * The SCM will generally invoke the executable with
+ * the c:\win\system32 default directory. This is very
+ * lethal if folks use ServerRoot /foopath on windows
+ * without a drive letter. Change to the default root
+ * (path to apache root, above /bin) for safety.
+ */
+ apr_filepath_set(def_server_root, process->pool);
+
+ /* Any other process has a console, so we don't to begin
+ * a Win9x service until the configuration is parsed and
+ * any command line errors are reported.
+ *
+ * We hold the return value so that we can die in pre_config
+ * after logging begins, and the failure can land in the log.
+ */
+ if (!errout) {
+ mpm_nt_eventlog_stderr_open(service_name, process->pool);
+ }
+ service_to_start_success = mpm_service_to_start(&service_name,
+ process->pool);
+ if (service_to_start_success == APR_SUCCESS) {
+ service_set = APR_SUCCESS;
+ }
+
+ /* Open a null handle to soak stdout in this process.
+ * Windows service processes are missing any file handle
+ * usable for stdin/out/err. This was the cause of later
+ * trouble with invocations of apr_file_open_stdout()
+ */
+ if ((rv = apr_file_open(&nullfile, "NUL",
+ APR_READ | APR_WRITE, APR_OS_DEFAULT,
+ process->pool)) == APR_SUCCESS) {
+ apr_file_t *nullstdout;
+ if (apr_file_open_stdout(&nullstdout, process->pool)
+ == APR_SUCCESS)
+ apr_file_dup2(nullstdout, nullfile, process->pool);
+ apr_file_close(nullfile);
+ }
+ }
+
+ /* Get the default for any -k option, except run */
+ if (service_set == SERVICE_UNSET && strcasecmp(signal_arg, "run")) {
+ service_set = mpm_service_set_name(process->pool, &service_name,
+ AP_DEFAULT_SERVICE_NAME);
+ }
+
+ if (!strcasecmp(signal_arg, "install")) /* -k install */
+ {
+ if (service_set == APR_SUCCESS)
+ {
+ ap_log_error(APLOG_MARK,APLOG_ERR, 0, NULL, APLOGNO(00433)
+ "%s: Service is already installed.", service_name);
+ exit(APEXIT_INIT);
+ }
+ }
+ else if (running_as_service)
+ {
+ if (service_set == APR_SUCCESS)
+ {
+ /* Attempt to Uninstall, or stop, before
+ * we can read the arguments or .conf files
+ */
+ if (!strcasecmp(signal_arg, "uninstall")) {
+ rv = mpm_service_uninstall();
+ exit(rv);
+ }
+
+ if ((!strcasecmp(signal_arg, "stop")) ||
+ (!strcasecmp(signal_arg, "shutdown"))) {
+ mpm_signal_service(process->pool, 0);
+ exit(0);
+ }
+
+ rv = mpm_merge_service_args(process->pool, mpm_new_argv,
+ fixed_args);
+ if (rv == APR_SUCCESS) {
+ ap_log_error(APLOG_MARK,APLOG_INFO, 0, NULL, APLOGNO(00434)
+ "Using ConfigArgs of the installed service "
+ "\"%s\".", service_name);
+ }
+ else {
+ ap_log_error(APLOG_MARK,APLOG_WARNING, rv, NULL, APLOGNO(00435)
+ "No installed ConfigArgs for the service "
+ "\"%s\", using Apache defaults.", service_name);
+ }
+ }
+ else
+ {
+ ap_log_error(APLOG_MARK,APLOG_ERR, service_set, NULL, APLOGNO(00436)
+ "No installed service named \"%s\".", service_name);
+ exit(APEXIT_INIT);
+ }
+ }
+ if (strcasecmp(signal_arg, "install") && service_set && service_set != SERVICE_UNSET)
+ {
+ ap_log_error(APLOG_MARK,APLOG_ERR, service_set, NULL, APLOGNO(00437)
+ "No installed service named \"%s\".", service_name);
+ exit(APEXIT_INIT);
+ }
+
+ /* Track the args actually entered by the user.
+ * These will be used for the -k install parameters, as well as
+ * for the -k start service override arguments.
+ */
+ inst_argv = (const char * const *)mpm_new_argv->elts
+ + mpm_new_argv->nelts - inst_argc;
+
+ /* Now, do service install or reconfigure then proceed to
+ * post_config to test the installed configuration.
+ */
+ if (!strcasecmp(signal_arg, "config")) { /* -k config */
+ /* Reconfigure the service */
+ rv = mpm_service_install(process->pool, inst_argc, inst_argv, 1);
+ if (rv != APR_SUCCESS) {
+ exit(rv);
+ }
+
+ fprintf(stderr,"Testing httpd.conf....\n");
+ fprintf(stderr,"Errors reported here must be corrected before the "
+ "service can be started.\n");
+ }
+ else if (!strcasecmp(signal_arg, "install")) { /* -k install */
+ /* Install the service */
+ rv = mpm_service_install(process->pool, inst_argc, inst_argv, 0);
+ if (rv != APR_SUCCESS) {
+ exit(rv);
+ }
+
+ fprintf(stderr,"Testing httpd.conf....\n");
+ fprintf(stderr,"Errors reported here must be corrected before the "
+ "service can be started.\n");
+ }
+
+ process->argc = mpm_new_argv->nelts;
+ process->argv = (const char * const *) mpm_new_argv->elts;
+}
+
+
+static int winnt_pre_config(apr_pool_t *pconf_, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+ /* Handle the following SCM aspects in this phase:
+ *
+ * -k runservice [WinNT errors logged from rewrite_args]
+ */
+
+ /* Initialize shared static objects.
+ * TODO: Put config related statics into an sconf structure.
+ */
+ pconf = pconf_;
+
+ if (ap_exists_config_define("ONE_PROCESS") ||
+ ap_exists_config_define("DEBUG"))
+ one_process = -1;
+
+ /* XXX: presume proper privileges; one nice thing would be
+ * a loud emit if running as "LocalSystem"/"SYSTEM" to indicate
+ * they should change to a user with write access to logs/ alone.
+ */
+ ap_sys_privileges_handlers(1);
+
+ if (!strcasecmp(signal_arg, "runservice")
+ && (service_to_start_success != APR_SUCCESS)) {
+ ap_log_error(APLOG_MARK,APLOG_CRIT, service_to_start_success, NULL, APLOGNO(00438)
+ "%s: Unable to start the service manager.",
+ service_name);
+ exit(APEXIT_INIT);
+ }
+ else if (ap_state_query(AP_SQ_RUN_MODE) == AP_SQ_RM_NORMAL
+ && !one_process && !my_generation) {
+ /* Open a null handle to soak stdout in this process.
+ * We need to emulate apr_proc_detach, unix performs this
+ * same check in the pre_config hook (although it is
+ * arguably premature). Services already fixed this.
+ */
+ apr_file_t *nullfile;
+ apr_status_t rv;
+ apr_pool_t *pproc = apr_pool_parent_get(pconf);
+
+ if ((rv = apr_file_open(&nullfile, "NUL",
+ APR_READ | APR_WRITE, APR_OS_DEFAULT,
+ pproc)) == APR_SUCCESS) {
+ apr_file_t *nullstdout;
+ if (apr_file_open_stdout(&nullstdout, pproc)
+ == APR_SUCCESS)
+ apr_file_dup2(nullstdout, nullfile, pproc);
+ apr_file_close(nullfile);
+ }
+ }
+
+ ap_listen_pre_config();
+ thread_limit = DEFAULT_THREAD_LIMIT;
+ ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
+
+ return OK;
+}
+
+static int winnt_check_config(apr_pool_t *pconf, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec* s)
+{
+ int is_parent;
+ int startup = 0;
+
+ /* We want this only in the parent and only the first time around */
+ is_parent = (parent_pid == my_pid);
+ if (is_parent &&
+ ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_PRE_CONFIG) {
+ startup = 1;
+ }
+
+ if (thread_limit > MAX_THREAD_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00439)
+ "WARNING: ThreadLimit of %d exceeds compile-time "
+ "limit of %d threads, decreasing to %d.",
+ thread_limit, MAX_THREAD_LIMIT, MAX_THREAD_LIMIT);
+ } else if (is_parent) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00440)
+ "ThreadLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ thread_limit, MAX_THREAD_LIMIT);
+ }
+ thread_limit = MAX_THREAD_LIMIT;
+ }
+ else if (thread_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00441)
+ "WARNING: ThreadLimit of %d not allowed, "
+ "increasing to 1.", thread_limit);
+ } else if (is_parent) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00442)
+ "ThreadLimit of %d not allowed, increasing to 1",
+ thread_limit);
+ }
+ thread_limit = 1;
+ }
+
+ /* You cannot change ThreadLimit across a restart; ignore
+ * any such attempts.
+ */
+ if (!first_thread_limit) {
+ first_thread_limit = thread_limit;
+ }
+ else if (thread_limit != first_thread_limit) {
+ /* Don't need a startup console version here */
+ if (is_parent) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00443)
+ "changing ThreadLimit to %d from original value "
+ "of %d not allowed during restart",
+ thread_limit, first_thread_limit);
+ }
+ thread_limit = first_thread_limit;
+ }
+
+ if (ap_threads_per_child > thread_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00444)
+ "WARNING: ThreadsPerChild of %d exceeds ThreadLimit "
+ "of %d threads, decreasing to %d. To increase, please "
+ "see the ThreadLimit directive.",
+ ap_threads_per_child, thread_limit, thread_limit);
+ } else if (is_parent) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00445)
+ "ThreadsPerChild of %d exceeds ThreadLimit "
+ "of %d, decreasing to match",
+ ap_threads_per_child, thread_limit);
+ }
+ ap_threads_per_child = thread_limit;
+ }
+ else if (ap_threads_per_child < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00446)
+ "WARNING: ThreadsPerChild of %d not allowed, "
+ "increasing to 1.", ap_threads_per_child);
+ } else if (is_parent) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00447)
+ "ThreadsPerChild of %d not allowed, increasing to 1",
+ ap_threads_per_child);
+ }
+ ap_threads_per_child = 1;
+ }
+
+ return OK;
+}
+
+static int winnt_post_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec* s)
+{
+ apr_status_t rv = 0;
+
+ /* Handle the following SCM aspects in this phase:
+ *
+ * -k install (catch and exit as install was handled in rewrite_args)
+ * -k config (catch and exit as config was handled in rewrite_args)
+ * -k start
+ * -k restart
+ * -k runservice [Win95, only once - after we parsed the config]
+ *
+ * because all of these signals are useful _only_ if there
+ * is a valid conf\httpd.conf environment to start.
+ *
+ * We reached this phase by avoiding errors that would cause
+ * these options to fail unexpectedly in another process.
+ */
+
+ if (!strcasecmp(signal_arg, "install")) {
+ /* Service install happens in the rewrite_args hooks. If we
+ * made it this far, the server configuration is clean and the
+ * service will successfully start.
+ */
+ apr_pool_destroy(s->process->pool);
+ apr_terminate();
+ exit(0);
+ }
+ if (!strcasecmp(signal_arg, "config")) {
+ /* Service reconfiguration happens in the rewrite_args hooks. If we
+ * made it this far, the server configuration is clean and the
+ * service will successfully start.
+ */
+ apr_pool_destroy(s->process->pool);
+ apr_terminate();
+ exit(0);
+ }
+
+ if (!strcasecmp(signal_arg, "start")) {
+ ap_listen_rec *lr;
+
+ /* Close the listening sockets. */
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ apr_socket_close(lr->sd);
+ lr->active = 0;
+ }
+ rv = mpm_service_start(ptemp, inst_argc, inst_argv);
+ apr_pool_destroy(s->process->pool);
+ apr_terminate();
+ exit (rv);
+ }
+
+ if (!strcasecmp(signal_arg, "restart")) {
+ mpm_signal_service(ptemp, 1);
+ apr_pool_destroy(s->process->pool);
+ apr_terminate();
+ exit (rv);
+ }
+
+ if (parent_pid == my_pid)
+ {
+ if (ap_state_query(AP_SQ_MAIN_STATE) != AP_SQ_MS_CREATE_PRE_CONFIG
+ && ap_state_query(AP_SQ_CONFIG_GEN) == 1)
+ {
+ /* This code should be run once in the parent and not run
+ * across a restart
+ */
+ setup_signal_names(apr_psprintf(pconf, "ap%lu", parent_pid));
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ /* Create shutdown event, apPID_shutdown, where PID is the parent
+ * Apache process ID. Shutdown is signaled by 'apache -k shutdown'.
+ */
+ shutdown_event = CreateEvent(NULL, FALSE, FALSE, signal_shutdown_name);
+ if (!shutdown_event) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00448)
+ "Parent: Cannot create shutdown event %s", signal_shutdown_name);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ /* Create restart event, apPID_restart, where PID is the parent
+ * Apache process ID. Restart is signaled by 'apache -k restart'.
+ */
+ restart_event = CreateEvent(NULL, FALSE, FALSE, signal_restart_name);
+ if (!restart_event) {
+ CloseHandle(shutdown_event);
+ ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf, APLOGNO(00449)
+ "Parent: Cannot create restart event %s", signal_restart_name);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ /* Create the start mutex, as an unnamed object for security.
+ * The start mutex is used during a restart to prevent more than
+ * one child process from entering the accept loop at once.
+ */
+ rv = apr_proc_mutex_create(&start_mutex, NULL,
+ APR_LOCK_DEFAULT,
+ ap_server_conf->process->pool);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK,APLOG_ERR, rv, ap_server_conf, APLOGNO(00450)
+ "%s: Unable to create the start_mutex.",
+ service_name);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+ /* Always reset our console handler to be the first, even on a restart
+ * because some modules (e.g. mod_perl) might have set a console
+ * handler to terminate the process.
+ */
+ if (strcasecmp(signal_arg, "runservice"))
+ mpm_start_console_handler();
+ }
+ else /* parent_pid != my_pid */
+ {
+ mpm_start_child_console_handler();
+ }
+ return OK;
+}
+
+/* This really should be a post_config hook, but the error log is already
+ * redirected by that point, so we need to do this in the open_logs phase.
+ */
+static int winnt_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+ /* Initialize shared static objects.
+ */
+ if (parent_pid != my_pid) {
+ return OK;
+ }
+
+ /* We cannot initialize our listeners if we are restarting
+ * (the parent process already has glomed on to them)
+ * nor should we do so for service reconfiguration
+ * (since the service may already be running.)
+ */
+ if (!strcasecmp(signal_arg, "restart")
+ || !strcasecmp(signal_arg, "config")) {
+ return OK;
+ }
+
+ if (ap_setup_listeners(s) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_STARTUP, 0,
+ NULL, APLOGNO(00451) "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ return OK;
+}
+
+static void winnt_child_init(apr_pool_t *pchild, struct server_rec *s)
+{
+ apr_status_t rv;
+
+ setup_signal_names(apr_psprintf(pchild, "ap%lu", parent_pid));
+
+ /* This is a child process, not in single process mode */
+ if (!one_process) {
+ /* Set up events and the scoreboard */
+ get_handles_from_parent(s, &exit_event, &start_mutex,
+ &ap_scoreboard_shm);
+
+ /* Set up the listeners */
+ get_listeners_from_parent(s);
+
+ /* Done reading from the parent, close that channel */
+ CloseHandle(pipe);
+ }
+ else {
+ /* Single process mode - this lock doesn't even need to exist */
+ rv = apr_proc_mutex_create(&start_mutex, signal_name_prefix,
+ APR_LOCK_DEFAULT, s->process->pool);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK,APLOG_ERR, rv, ap_server_conf, APLOGNO(00452)
+ "%s child: Unable to init the start_mutex.",
+ service_name);
+ exit(APEXIT_CHILDINIT);
+ }
+
+ /* Borrow the shutdown_even as our _child_ loop exit event */
+ exit_event = shutdown_event;
+ }
+}
+
+
+static int winnt_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s )
+{
+ static int restart = 0; /* Default is "not a restart" */
+
+ /* ### If non-graceful restarts are ever introduced - we need to rerun
+ * the pre_mpm hook on subsequent non-graceful restarts. But Win32
+ * has only graceful style restarts - and we need this hook to act
+ * the same on Win32 as on Unix.
+ */
+ if (!restart && ((parent_pid == my_pid) || one_process)) {
+ /* Set up the scoreboard. */
+ if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+ return !OK;
+ }
+ }
+
+ if ((parent_pid != my_pid) || one_process)
+ {
+ /* The child process or in one_process (debug) mode
+ */
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00453)
+ "Child process is running");
+
+ child_main(pconf, parent_pid);
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, ap_server_conf, APLOGNO(00454)
+ "Child process is exiting");
+ return DONE;
+ }
+ else
+ {
+ /* A real-honest to goodness parent */
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00455)
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00456)
+ "Server built: %s", ap_get_server_built());
+ ap_log_command_line(plog, s);
+ ap_log_mpm_common(s);
+
+ restart = master_main(ap_server_conf, shutdown_event, restart_event);
+
+ if (!restart)
+ {
+ /* Shutting down. Clean up... */
+ ap_remove_pid(pconf, ap_pid_fname);
+ apr_proc_mutex_destroy(start_mutex);
+
+ CloseHandle(restart_event);
+ CloseHandle(shutdown_event);
+
+ return DONE;
+ }
+ }
+
+ return OK; /* Restart */
+}
+
+static void winnt_hooks(apr_pool_t *p)
+{
+ /* Our open_logs hook function must run before the core's, or stderr
+ * will be redirected to a file, and the messages won't print to the
+ * console.
+ */
+ static const char *const aszSucc[] = {"core.c", NULL};
+
+ ap_hook_pre_config(winnt_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_check_config(winnt_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_post_config(winnt_post_config, NULL, NULL, 0);
+ ap_hook_child_init(winnt_child_init, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_open_logs(winnt_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
+ ap_hook_mpm(winnt_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(winnt_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(winnt_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+AP_DECLARE_MODULE(mpm_winnt) = {
+ MPM20_MODULE_STUFF,
+ winnt_rewrite_args, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ winnt_cmds, /* command apr_table_t */
+ winnt_hooks /* register_hooks */
+};
+
+#endif /* def WIN32 */
diff --git a/server/mpm/winnt/mpm_winnt.h b/server/mpm/winnt/mpm_winnt.h
new file mode 100644
index 0000000..22ba001
--- /dev/null
+++ b/server/mpm/winnt/mpm_winnt.h
@@ -0,0 +1,96 @@
+/* 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 mpm_winnt.h
+ * @brief WinNT MPM specific
+ *
+ * @addtogroup APACHE_MPM_WINNT
+ * @{
+ */
+
+#ifndef APACHE_MPM_WINNT_H
+#define APACHE_MPM_WINNT_H
+
+#include "apr_proc_mutex.h"
+#include "ap_listen.h"
+
+/* From service.c: */
+
+#define SERVICE_APACHE_RESTART 128
+
+#ifndef AP_DEFAULT_SERVICE_NAME
+#define AP_DEFAULT_SERVICE_NAME "Apache2.4"
+#endif
+
+#define SERVICECONFIG "System\\CurrentControlSet\\Services\\%s"
+#define SERVICEPARAMS "System\\CurrentControlSet\\Services\\%s\\Parameters"
+
+apr_status_t mpm_service_set_name(apr_pool_t *p, const char **display_name,
+ const char *set_name);
+apr_status_t mpm_merge_service_args(apr_pool_t *p, apr_array_header_t *args,
+ int fixed_args);
+
+apr_status_t mpm_service_to_start(const char **display_name, apr_pool_t *p);
+apr_status_t mpm_service_started(void);
+apr_status_t mpm_service_install(apr_pool_t *ptemp, int argc,
+ char const* const* argv, int reconfig);
+apr_status_t mpm_service_uninstall(void);
+
+apr_status_t mpm_service_start(apr_pool_t *ptemp, int argc,
+ char const* const* argv);
+
+void mpm_signal_service(apr_pool_t *ptemp, int signal);
+
+void mpm_service_stopping(void);
+
+void mpm_start_console_handler(void);
+void mpm_start_child_console_handler(void);
+
+/* From nt_eventlog.c: */
+
+void mpm_nt_eventlog_stderr_open(const char *display_name, apr_pool_t *p);
+void mpm_nt_eventlog_stderr_flush(void);
+
+/* From mpm_winnt.c: */
+
+extern module AP_MODULE_DECLARE_DATA mpm_winnt_module;
+extern int ap_threads_per_child;
+
+extern DWORD my_pid;
+extern apr_proc_mutex_t *start_mutex;
+extern HANDLE exit_event;
+
+extern int winnt_mpm_state;
+extern OSVERSIONINFO osver;
+extern DWORD stack_res_flag;
+
+extern void clean_child_exit(int);
+
+typedef enum {
+ SIGNAL_PARENT_SHUTDOWN,
+ SIGNAL_PARENT_RESTART,
+ SIGNAL_PARENT_RESTART_GRACEFUL
+} ap_signal_parent_e;
+AP_DECLARE(void) ap_signal_parent(ap_signal_parent_e type);
+
+void hold_console_open_on_error(void);
+
+/* From child.c: */
+void child_main(apr_pool_t *pconf, DWORD parent_pid);
+
+#endif /* APACHE_MPM_WINNT_H */
+/** @} */
diff --git a/server/mpm/winnt/nt_eventlog.c b/server/mpm/winnt/nt_eventlog.c
new file mode 100644
index 0000000..cd49ee6
--- /dev/null
+++ b/server/mpm/winnt/nt_eventlog.c
@@ -0,0 +1,172 @@
+/* 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.
+ */
+
+#include "httpd.h"
+#include "http_log.h"
+#include "mpm_winnt.h"
+#include "apr_strings.h"
+#include "apr_lib.h"
+#include "apr_portable.h"
+#include "ap_regkey.h"
+
+static const char *display_name = NULL;
+static HANDLE stderr_thread = NULL;
+static HANDLE stderr_ready;
+
+static DWORD WINAPI service_stderr_thread(LPVOID hPipe)
+{
+ HANDLE hPipeRead = (HANDLE) hPipe;
+ HANDLE hEventSource;
+ char errbuf[256];
+ char *errmsg = errbuf;
+ const char *errarg[9];
+ DWORD errres;
+ ap_regkey_t *regkey;
+ apr_status_t rv;
+ apr_pool_t *p;
+
+ apr_pool_create_ex(&p, NULL, NULL, NULL);
+ apr_pool_tag(p, "service_stderr_thread");
+
+ errarg[0] = "The Apache service named";
+ errarg[1] = display_name;
+ errarg[2] = "reported the following error:\r\n>>>";
+ errarg[3] = errbuf;
+ errarg[4] = NULL;
+ errarg[5] = NULL;
+ errarg[6] = NULL;
+ errarg[7] = NULL;
+ errarg[8] = NULL;
+
+ /* What are we going to do in here, bail on the user? not. */
+ if ((rv = ap_regkey_open(&regkey, AP_REGKEY_LOCAL_MACHINE,
+ "SYSTEM\\CurrentControlSet\\Services\\"
+ "EventLog\\Application\\Apache Service",
+ APR_READ | APR_WRITE | APR_CREATE, p))
+ == APR_SUCCESS)
+ {
+ DWORD dwData = EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE |
+ EVENTLOG_INFORMATION_TYPE;
+
+ /* The stock message file */
+ ap_regkey_value_set(regkey, "EventMessageFile",
+ "%SystemRoot%\\System32\\netmsg.dll",
+ AP_REGKEY_EXPAND, p);
+
+ ap_regkey_value_raw_set(regkey, "TypesSupported", &dwData,
+ sizeof(dwData), REG_DWORD, p);
+ ap_regkey_close(regkey);
+ }
+
+ hEventSource = RegisterEventSourceW(NULL, L"Apache Service");
+
+ SetEvent(stderr_ready);
+
+ while (ReadFile(hPipeRead, errmsg, 1, &errres, NULL) && (errres == 1))
+ {
+ if ((errmsg > errbuf) || !apr_isspace(*errmsg))
+ {
+ ++errmsg;
+ if ((*(errmsg - 1) == '\n')
+ || (errmsg >= errbuf + sizeof(errbuf) - 1))
+ {
+ while ((errmsg > errbuf) && apr_isspace(*(errmsg - 1))) {
+ --errmsg;
+ }
+ *errmsg = '\0';
+
+ /* Generic message: '%1 %2 %3 %4 %5 %6 %7 %8 %9'
+ * The event code in netmsg.dll is 3299
+ */
+ ReportEvent(hEventSource, EVENTLOG_ERROR_TYPE, 0,
+ 3299, NULL, 9, 0, errarg, NULL);
+ errmsg = errbuf;
+ }
+ }
+ }
+
+ if ((errres = GetLastError()) != ERROR_BROKEN_PIPE) {
+ apr_snprintf(errbuf, sizeof(errbuf),
+ "Win32 error %lu reading stderr pipe stream\r\n",
+ GetLastError());
+
+ ReportEvent(hEventSource, EVENTLOG_ERROR_TYPE, 0,
+ 3299, NULL, 9, 0, errarg, NULL);
+ }
+
+ CloseHandle(hPipeRead);
+ DeregisterEventSource(hEventSource);
+ CloseHandle(stderr_thread);
+ stderr_thread = NULL;
+ apr_pool_destroy(p);
+ return 0;
+}
+
+
+void mpm_nt_eventlog_stderr_flush(void)
+{
+ HANDLE cleanup_thread = stderr_thread;
+
+ if (cleanup_thread) {
+ HANDLE hErr = GetStdHandle(STD_ERROR_HANDLE);
+ fclose(stderr);
+ CloseHandle(hErr);
+ WaitForSingleObject(cleanup_thread, 30000);
+ CloseHandle(cleanup_thread);
+ }
+}
+
+
+void mpm_nt_eventlog_stderr_open(const char *argv0, apr_pool_t *p)
+{
+ SECURITY_ATTRIBUTES sa;
+ HANDLE hPipeRead = NULL;
+ HANDLE hPipeWrite = NULL;
+ DWORD threadid;
+ apr_file_t *eventlog_file;
+ apr_file_t *stderr_file;
+
+ display_name = argv0;
+
+ /* Create a pipe to send stderr messages to the system error log.
+ *
+ * _dup2() duplicates the write handle inheritable for us.
+ */
+ sa.nLength = sizeof(sa);
+ sa.lpSecurityDescriptor = NULL;
+ sa.bInheritHandle = FALSE;
+ CreatePipe(&hPipeRead, &hPipeWrite, NULL, 0);
+ ap_assert(hPipeRead && hPipeWrite);
+
+ stderr_ready = CreateEvent(NULL, FALSE, FALSE, NULL);
+ stderr_thread = CreateThread(NULL, 65536, service_stderr_thread,
+ (LPVOID)hPipeRead, stack_res_flag, &threadid);
+ ap_assert(stderr_ready && stderr_thread);
+
+ WaitForSingleObject(stderr_ready, INFINITE);
+
+ if ((apr_file_open_stderr(&stderr_file, p)
+ == APR_SUCCESS)
+ && (apr_os_file_put(&eventlog_file, &hPipeWrite, APR_WRITE, p)
+ == APR_SUCCESS))
+ apr_file_dup2(stderr_file, eventlog_file, p);
+
+ /* The code above _will_ corrupt the StdHandle...
+ * and we must do so anyways. We set this up only
+ * after we initialized the posix stderr API.
+ */
+ ap_open_stderr_log(p);
+}
diff --git a/server/mpm/winnt/service.c b/server/mpm/winnt/service.c
new file mode 100644
index 0000000..2e473cf
--- /dev/null
+++ b/server/mpm/winnt/service.c
@@ -0,0 +1,1241 @@
+/* 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.
+ */
+
+/* This module ALONE requires the window message API from user.h
+ * and the default APR include of windows.h will omit it, so
+ * preload the API symbols now...
+ */
+
+#define _WINUSER_
+
+#include "apr.h"
+#include "apr_strings.h"
+#include "apr_lib.h"
+#if APR_HAS_UNICODE_FS
+#include "arch/win32/apr_arch_utf8.h"
+#include "arch/win32/apr_arch_misc.h"
+#include <wchar.h>
+#endif
+
+#include "httpd.h"
+#include "http_log.h"
+#include "mpm_winnt.h"
+#include "ap_regkey.h"
+
+#ifdef NOUSER
+#undef NOUSER
+#endif
+#undef _WINUSER_
+#include <winuser.h>
+#include <time.h>
+
+APLOG_USE_MODULE(mpm_winnt);
+
+/* Todo; clear up statics */
+static char *mpm_service_name = NULL;
+static char *mpm_display_name = NULL;
+
+#if APR_HAS_UNICODE_FS
+static apr_wchar_t *mpm_service_name_w;
+#endif
+
+typedef struct nt_service_ctx_t
+{
+ HANDLE mpm_thread; /* primary thread handle of the apache server */
+ HANDLE service_thread; /* thread service/monitor handle */
+ DWORD service_thread_id;/* thread service/monitor ID */
+ HANDLE service_init; /* controller thread init mutex */
+ HANDLE service_term; /* NT service thread kill signal */
+ SERVICE_STATUS ssStatus;
+ SERVICE_STATUS_HANDLE hServiceStatus;
+} nt_service_ctx_t;
+
+static nt_service_ctx_t globdat;
+
+static int ReportStatusToSCMgr(int currentState, int waitHint,
+ nt_service_ctx_t *ctx);
+
+/* Rather than repeat this logic throughout, create an either-or wide or narrow
+ * implementation because we don't actually pass strings to OpenSCManager.
+ * This election is based on build time defines and runtime os version test.
+ */
+#undef OpenSCManager
+typedef SC_HANDLE (WINAPI *fpt_OpenSCManager)(const void *lpMachine,
+ const void *lpDatabase,
+ DWORD dwAccess);
+static fpt_OpenSCManager pfn_OpenSCManager = NULL;
+static APR_INLINE SC_HANDLE OpenSCManager(const void *lpMachine,
+ const void *lpDatabase,
+ DWORD dwAccess)
+{
+ if (!pfn_OpenSCManager) {
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ pfn_OpenSCManager = (fpt_OpenSCManager)OpenSCManagerW;
+#endif
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ pfn_OpenSCManager = (fpt_OpenSCManager)OpenSCManagerA;
+#endif
+ }
+ return (*(pfn_OpenSCManager))(lpMachine, lpDatabase, dwAccess);
+}
+
+/* exit() for Win32 is macro mapped (horrible, we agree) that allows us
+ * to catch the non-zero conditions and inform the console process that
+ * the application died, and hang on to the console a bit longer.
+ *
+ * The macro only maps for http_main.c and other sources that include
+ * the service.h header, so we best assume it's an error to exit from
+ * _any_ other module.
+ *
+ * If ap_real_exit_code is reset to 0, it will not be set or trigger this
+ * behavior on exit. All service and child processes are expected to
+ * reset this flag to zero to avoid undesirable side effects.
+ */
+AP_DECLARE_DATA int ap_real_exit_code = 1;
+
+void hold_console_open_on_error(void)
+{
+ HANDLE hConIn;
+ HANDLE hConErr;
+ DWORD result;
+ time_t start;
+ time_t remains;
+ char *msg = "Note the errors or messages above, "
+ "and press the <ESC> key to exit. ";
+ CONSOLE_SCREEN_BUFFER_INFO coninfo;
+ INPUT_RECORD in;
+ char count[16];
+
+ if (!ap_real_exit_code)
+ return;
+ hConIn = GetStdHandle(STD_INPUT_HANDLE);
+ hConErr = GetStdHandle(STD_ERROR_HANDLE);
+ if ((hConIn == INVALID_HANDLE_VALUE) || (hConErr == INVALID_HANDLE_VALUE))
+ return;
+ if (!WriteConsole(hConErr, msg, (DWORD)strlen(msg), &result, NULL)
+ || !result)
+ return;
+ if (!GetConsoleScreenBufferInfo(hConErr, &coninfo))
+ return;
+ if (!SetConsoleMode(hConIn, ENABLE_MOUSE_INPUT | 0x80))
+ return;
+
+ start = time(NULL);
+ do
+ {
+ while (PeekConsoleInput(hConIn, &in, 1, &result) && result)
+ {
+ if (!ReadConsoleInput(hConIn, &in, 1, &result) || !result)
+ return;
+ if ((in.EventType == KEY_EVENT) && in.Event.KeyEvent.bKeyDown
+ && (in.Event.KeyEvent.uChar.AsciiChar == 27))
+ return;
+ if (in.EventType == MOUSE_EVENT
+ && (in.Event.MouseEvent.dwEventFlags == DOUBLE_CLICK))
+ return;
+ }
+ remains = ((start + 30) - time(NULL));
+ sprintf(count, "%d...",
+ (int)remains); /* 30 or less, so can't overflow int */
+ if (!SetConsoleCursorPosition(hConErr, coninfo.dwCursorPosition))
+ return;
+ if (!WriteConsole(hConErr, count, (DWORD)strlen(count), &result, NULL)
+ || !result)
+ return;
+ }
+ while ((remains > 0) && WaitForSingleObject(hConIn, 1000) != WAIT_FAILED);
+}
+
+static BOOL CALLBACK console_control_handler(DWORD ctrl_type)
+{
+ switch (ctrl_type)
+ {
+ case CTRL_BREAK_EVENT:
+ fprintf(stderr, "Apache server restarting...\n");
+ ap_signal_parent(SIGNAL_PARENT_RESTART);
+ return TRUE;
+ case CTRL_C_EVENT:
+ fprintf(stderr, "Apache server interrupted...\n");
+ /* for Interrupt signals, shut down the server.
+ * Tell the system we have dealt with the signal
+ * without waiting for Apache to terminate.
+ */
+ ap_signal_parent(SIGNAL_PARENT_SHUTDOWN);
+ return TRUE;
+
+ case CTRL_CLOSE_EVENT:
+ case CTRL_LOGOFF_EVENT:
+ case CTRL_SHUTDOWN_EVENT:
+ /* for Terminate signals, shut down the server.
+ * Wait for Apache to terminate, but respond
+ * after a reasonable time to tell the system
+ * that we did attempt to shut ourself down.
+ */
+ fprintf(stderr, "Apache server shutdown initiated...\n");
+ ap_signal_parent(SIGNAL_PARENT_SHUTDOWN);
+ Sleep(30000);
+ return TRUE;
+ }
+
+ /* We should never get here, but this is (mostly) harmless */
+ return FALSE;
+}
+
+
+static void stop_console_handler(void)
+{
+ SetConsoleCtrlHandler(console_control_handler, FALSE);
+}
+
+
+void mpm_start_console_handler(void)
+{
+ SetConsoleCtrlHandler(console_control_handler, TRUE);
+ atexit(stop_console_handler);
+}
+
+
+void mpm_start_child_console_handler(void)
+{
+ FreeConsole();
+}
+
+
+/**********************************
+ WinNT service control management
+ **********************************/
+
+static int ReportStatusToSCMgr(int currentState, int waitHint,
+ nt_service_ctx_t *ctx)
+{
+ int rv = APR_SUCCESS;
+
+ if (ctx->hServiceStatus)
+ {
+ if (currentState == SERVICE_RUNNING) {
+ ctx->ssStatus.dwWaitHint = 0;
+ ctx->ssStatus.dwCheckPoint = 0;
+ ctx->ssStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP
+ | SERVICE_ACCEPT_SHUTDOWN;
+ }
+ else if (currentState == SERVICE_STOPPED) {
+ ctx->ssStatus.dwWaitHint = 0;
+ ctx->ssStatus.dwCheckPoint = 0;
+ /* An unexpected exit? Better to error! */
+ if (ctx->ssStatus.dwCurrentState != SERVICE_STOP_PENDING
+ && !ctx->ssStatus.dwServiceSpecificExitCode)
+ ctx->ssStatus.dwServiceSpecificExitCode = 1;
+ if (ctx->ssStatus.dwServiceSpecificExitCode)
+ ctx->ssStatus.dwWin32ExitCode = ERROR_SERVICE_SPECIFIC_ERROR;
+ }
+ else {
+ ++ctx->ssStatus.dwCheckPoint;
+ ctx->ssStatus.dwControlsAccepted = 0;
+ if(waitHint)
+ ctx->ssStatus.dwWaitHint = waitHint;
+ }
+
+ ctx->ssStatus.dwCurrentState = currentState;
+
+ rv = SetServiceStatus(ctx->hServiceStatus, &ctx->ssStatus);
+ }
+ return(rv);
+}
+
+/* Note this works on Win2000 and later due to ChangeServiceConfig2
+ * Continue to test its existence, but at least drop the feature
+ * of revising service description tags prior to Win2000.
+ */
+
+/* borrowed from mpm_winnt.c */
+extern apr_pool_t *pconf;
+
+static void set_service_description(void)
+{
+ const char *full_description;
+ SC_HANDLE schSCManager;
+
+ /* Nothing to do if we are a console
+ */
+ if (!mpm_service_name)
+ return;
+
+ /* Time to fix up the description, upon each successful restart
+ */
+ full_description = ap_get_server_description();
+
+ if ((ChangeServiceConfig2) &&
+ (schSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT)))
+ {
+ SC_HANDLE schService;
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ schService = OpenServiceW(schSCManager,
+ (LPCWSTR)mpm_service_name_w,
+ SERVICE_CHANGE_CONFIG);
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ schService = OpenService(schSCManager, mpm_service_name,
+ SERVICE_CHANGE_CONFIG);
+ }
+#endif
+ if (schService) {
+ /* Cast is necessary, ChangeServiceConfig2 handles multiple
+ * object types, some volatile, some not.
+ */
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ apr_size_t slen = strlen(full_description) + 1;
+ apr_size_t wslen = slen;
+ apr_wchar_t *full_description_w =
+ (apr_wchar_t*)apr_palloc(pconf,
+ wslen * sizeof(apr_wchar_t));
+ apr_status_t rv = apr_conv_utf8_to_ucs2(full_description, &slen,
+ full_description_w,
+ &wslen);
+ if ((rv != APR_SUCCESS) || slen
+ || ChangeServiceConfig2W(schService, 1
+ /*SERVICE_CONFIG_DESCRIPTION*/,
+ (LPVOID) &full_description_w))
+ full_description = NULL;
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ if (ChangeServiceConfig2(schService,
+ 1 /* SERVICE_CONFIG_DESCRIPTION */,
+ (LPVOID) &full_description))
+ full_description = NULL;
+ }
+#endif
+ CloseServiceHandle(schService);
+ }
+ CloseServiceHandle(schSCManager);
+ }
+}
+
+/* handle the SCM's ControlService() callbacks to our service */
+
+static DWORD WINAPI service_nt_ctrl(DWORD dwCtrlCode, DWORD dwEventType,
+ LPVOID lpEventData, LPVOID lpContext)
+{
+ nt_service_ctx_t *ctx = lpContext;
+
+ /* SHUTDOWN is offered before STOP, accept the first opportunity */
+ if ((dwCtrlCode == SERVICE_CONTROL_STOP)
+ || (dwCtrlCode == SERVICE_CONTROL_SHUTDOWN))
+ {
+ ap_signal_parent(SIGNAL_PARENT_SHUTDOWN);
+ ReportStatusToSCMgr(SERVICE_STOP_PENDING, 30000, ctx);
+ return (NO_ERROR);
+ }
+ if (dwCtrlCode == SERVICE_APACHE_RESTART)
+ {
+ ap_signal_parent(SIGNAL_PARENT_RESTART);
+ ReportStatusToSCMgr(SERVICE_START_PENDING, 30000, ctx);
+ return (NO_ERROR);
+ }
+ if (dwCtrlCode == SERVICE_CONTROL_INTERROGATE) {
+ ReportStatusToSCMgr(globdat.ssStatus.dwCurrentState, 0, ctx);
+ return (NO_ERROR);
+ }
+
+ return (ERROR_CALL_NOT_IMPLEMENTED);
+}
+
+
+/* service_nt_main_fn is outside of the call stack and outside of the
+ * primary server thread... so now we _really_ need a placeholder!
+ * The winnt_rewrite_args has created and shared mpm_new_argv with us.
+ */
+extern apr_array_header_t *mpm_new_argv;
+
+#if APR_HAS_UNICODE_FS
+static void __stdcall service_nt_main_fn_w(DWORD argc, LPWSTR *argv)
+{
+ const char *ignored;
+ nt_service_ctx_t *ctx = &globdat;
+ char *service_name;
+ apr_size_t wslen = wcslen(argv[0]) + 1;
+ apr_size_t slen = wslen * 3 - 2;
+
+ service_name = malloc(slen);
+ (void)apr_conv_ucs2_to_utf8(argv[0], &wslen, service_name, &slen);
+
+ /* args and service names live in the same pool */
+ mpm_service_set_name(mpm_new_argv->pool, &ignored, service_name);
+
+ memset(&ctx->ssStatus, 0, sizeof(ctx->ssStatus));
+ ctx->ssStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
+ ctx->ssStatus.dwCurrentState = SERVICE_START_PENDING;
+ ctx->ssStatus.dwCheckPoint = 1;
+ if (!(ctx->hServiceStatus =
+ RegisterServiceCtrlHandlerExW(argv[0], service_nt_ctrl, ctx)))
+ {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP,
+ apr_get_os_error(), NULL,
+ APLOGNO(00365) "Failure registering service handler");
+ return;
+ }
+
+ /* Report status, no errors, and buy 3 more seconds */
+ ReportStatusToSCMgr(SERVICE_START_PENDING, 30000, ctx);
+
+ /* We need to append all the command arguments passed via StartService()
+ * to our running service... which just got here via the SCM...
+ * but we have no interest in argv[0] for the mpm_new_argv list.
+ */
+ if (argc > 1)
+ {
+ char **cmb_data, **cmb;
+ DWORD i;
+
+ mpm_new_argv->nalloc = mpm_new_argv->nelts + argc - 1;
+ cmb_data = malloc(mpm_new_argv->nalloc * sizeof(const char *));
+
+ /* mpm_new_argv remains first (of lower significance) */
+ memcpy (cmb_data, mpm_new_argv->elts,
+ mpm_new_argv->elt_size * mpm_new_argv->nelts);
+
+ /* Service args follow from StartService() invocation */
+ memcpy (cmb_data + mpm_new_argv->nelts, argv + 1,
+ mpm_new_argv->elt_size * (argc - 1));
+
+ cmb = cmb_data + mpm_new_argv->nelts;
+
+ for (i = 1; i < argc; ++i)
+ {
+ wslen = wcslen(argv[i]) + 1;
+ slen = wslen * 3 - 2;
+ service_name = malloc(slen);
+ (void)apr_conv_ucs2_to_utf8(argv[i], &wslen, *(cmb++), &slen);
+ }
+
+ /* The replacement arg list is complete */
+ mpm_new_argv->elts = (char *)cmb_data;
+ mpm_new_argv->nelts = mpm_new_argv->nalloc;
+ }
+
+ /* Let the main thread continue now... but hang on to the
+ * signal_monitor event so we can take further action
+ */
+ SetEvent(ctx->service_init);
+
+ WaitForSingleObject(ctx->service_term, INFINITE);
+}
+#endif /* APR_HAS_UNICODE_FS */
+
+
+#if APR_HAS_ANSI_FS
+static void __stdcall service_nt_main_fn(DWORD argc, LPSTR *argv)
+{
+ const char *ignored;
+ nt_service_ctx_t *ctx = &globdat;
+
+ /* args and service names live in the same pool */
+ mpm_service_set_name(mpm_new_argv->pool, &ignored, argv[0]);
+
+ memset(&ctx->ssStatus, 0, sizeof(ctx->ssStatus));
+ ctx->ssStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
+ ctx->ssStatus.dwCurrentState = SERVICE_START_PENDING;
+ ctx->ssStatus.dwCheckPoint = 1;
+
+ if (!(ctx->hServiceStatus =
+ RegisterServiceCtrlHandlerExA(argv[0], service_nt_ctrl, ctx)))
+ {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP,
+ apr_get_os_error(), NULL,
+ APLOGNO(10008) "Failure registering service handler");
+ return;
+ }
+
+ /* Report status, no errors, and buy 3 more seconds */
+ ReportStatusToSCMgr(SERVICE_START_PENDING, 30000, ctx);
+
+ /* We need to append all the command arguments passed via StartService()
+ * to our running service... which just got here via the SCM...
+ * but we have no interest in argv[0] for the mpm_new_argv list.
+ */
+ if (argc > 1)
+ {
+ char **cmb_data;
+
+ mpm_new_argv->nalloc = mpm_new_argv->nelts + argc - 1;
+ cmb_data = malloc(mpm_new_argv->nalloc * sizeof(const char *));
+
+ /* mpm_new_argv remains first (of lower significance) */
+ memcpy (cmb_data, mpm_new_argv->elts,
+ mpm_new_argv->elt_size * mpm_new_argv->nelts);
+
+ /* Service args follow from StartService() invocation */
+ memcpy (cmb_data + mpm_new_argv->nelts, argv + 1,
+ mpm_new_argv->elt_size * (argc - 1));
+
+ /* The replacement arg list is complete */
+ mpm_new_argv->elts = (char *)cmb_data;
+ mpm_new_argv->nelts = mpm_new_argv->nalloc;
+ }
+
+ /* Let the main thread continue now... but hang on to the
+ * signal_monitor event so we can take further action
+ */
+ SetEvent(ctx->service_init);
+
+ WaitForSingleObject(ctx->service_term, INFINITE);
+}
+#endif
+
+
+ static DWORD WINAPI service_nt_dispatch_thread(LPVOID nada)
+ {
+#if APR_HAS_UNICODE_FS
+ SERVICE_TABLE_ENTRYW dispatchTable_w[] =
+ {
+ { L"", service_nt_main_fn_w },
+ { NULL, NULL }
+ };
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ SERVICE_TABLE_ENTRYA dispatchTable[] =
+ {
+ { "", service_nt_main_fn },
+ { NULL, NULL }
+ };
+#endif
+ apr_status_t rv;
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ rv = StartServiceCtrlDispatcherW(dispatchTable_w);
+#endif
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ rv = StartServiceCtrlDispatcherA(dispatchTable);
+#endif
+ if (rv) {
+ rv = APR_SUCCESS;
+ }
+ else {
+ /* This is a genuine failure of the SCM. */
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00366) "Error starting Windows service control "
+ "dispatcher");
+ }
+ return (rv);
+}
+
+
+/* The service configuration's is stored under the following trees:
+ *
+ * HKLM\System\CurrentControlSet\Services\[service name]
+ *
+ * \DisplayName
+ * \ImagePath
+ * \Parameters\ConfigArgs
+ */
+
+
+apr_status_t mpm_service_set_name(apr_pool_t *p, const char **display_name,
+ const char *set_name)
+{
+ char key_name[MAX_PATH];
+ ap_regkey_t *key;
+ apr_status_t rv;
+
+ /* ### Needs improvement, on Win2K the user can _easily_
+ * change the display name to a string that doesn't reflect
+ * the internal service name + whitespace!
+ */
+ mpm_service_name = apr_palloc(p, strlen(set_name) + 1);
+ apr_collapse_spaces((char*) mpm_service_name, set_name);
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ apr_size_t slen = strlen(mpm_service_name) + 1;
+ apr_size_t wslen = slen;
+ mpm_service_name_w = apr_palloc(p, wslen * sizeof(apr_wchar_t));
+ rv = apr_conv_utf8_to_ucs2(mpm_service_name, &slen,
+ mpm_service_name_w, &wslen);
+ if (rv != APR_SUCCESS)
+ return rv;
+ else if (slen)
+ return APR_ENAMETOOLONG;
+ }
+#endif /* APR_HAS_UNICODE_FS */
+
+ apr_snprintf(key_name, sizeof(key_name), SERVICECONFIG, mpm_service_name);
+ rv = ap_regkey_open(&key, AP_REGKEY_LOCAL_MACHINE, key_name,
+ APR_READ, pconf);
+ if (rv == APR_SUCCESS) {
+ rv = ap_regkey_value_get(&mpm_display_name, key, "DisplayName", pconf);
+ ap_regkey_close(key);
+ }
+ if (rv != APR_SUCCESS) {
+ /* Take the given literal name if there is no service entry */
+ mpm_display_name = apr_pstrdup(p, set_name);
+ }
+ *display_name = mpm_display_name;
+
+ return rv;
+}
+
+
+apr_status_t mpm_merge_service_args(apr_pool_t *p,
+ apr_array_header_t *args,
+ int fixed_args)
+{
+ apr_array_header_t *svc_args = NULL;
+ char conf_key[MAX_PATH];
+ char **cmb_data;
+ apr_status_t rv;
+ ap_regkey_t *key;
+
+ apr_snprintf(conf_key, sizeof(conf_key), SERVICEPARAMS, mpm_service_name);
+ rv = ap_regkey_open(&key, AP_REGKEY_LOCAL_MACHINE, conf_key, APR_READ, p);
+ if (rv == APR_SUCCESS) {
+ rv = ap_regkey_value_array_get(&svc_args, key, "ConfigArgs", p);
+ ap_regkey_close(key);
+ }
+ if (rv != APR_SUCCESS) {
+ if (rv == ERROR_FILE_NOT_FOUND) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO(00367)
+ "No ConfigArgs registered for the '%s' service, "
+ "perhaps this service is not installed?",
+ mpm_service_name);
+ return APR_SUCCESS;
+ }
+ else
+ return (rv);
+ }
+
+ if (!svc_args || svc_args->nelts == 0) {
+ return (APR_SUCCESS);
+ }
+
+ /* Now we have the mpm_service_name arg, and the mpm_runservice_nt()
+ * call appended the arguments passed by StartService(), so it's
+ * time to _prepend_ the default arguments for the server from
+ * the service's default arguments (all others override them)...
+ */
+ args->nalloc = args->nelts + svc_args->nelts;
+ cmb_data = malloc(args->nalloc * sizeof(const char *));
+
+ /* First three args (argv[0], -f, path) remain first */
+ memcpy(cmb_data, args->elts, args->elt_size * fixed_args);
+
+ /* Service args follow from service registry array */
+ memcpy(cmb_data + fixed_args, svc_args->elts,
+ svc_args->elt_size * svc_args->nelts);
+
+ /* Remaining new args follow */
+ memcpy(cmb_data + fixed_args + svc_args->nelts,
+ (const char **)args->elts + fixed_args,
+ args->elt_size * (args->nelts - fixed_args));
+
+ args->elts = (char *)cmb_data;
+ args->nelts = args->nalloc;
+
+ return APR_SUCCESS;
+}
+
+
+static void service_stopped(void)
+{
+ /* Still have a thread & window to clean up, so signal now */
+ if (globdat.service_thread)
+ {
+ /* Stop logging to the event log */
+ mpm_nt_eventlog_stderr_flush();
+
+ /* Cause the service_nt_main_fn to complete */
+ ReleaseMutex(globdat.service_term);
+
+ ReportStatusToSCMgr(SERVICE_STOPPED, 0, &globdat);
+
+ WaitForSingleObject(globdat.service_thread, 5000);
+ CloseHandle(globdat.service_thread);
+ }
+}
+
+
+apr_status_t mpm_service_to_start(const char **display_name, apr_pool_t *p)
+{
+ HANDLE hProc = GetCurrentProcess();
+ HANDLE hThread = GetCurrentThread();
+ HANDLE waitfor[2];
+
+ /* Prevent holding open the (hidden) console */
+ ap_real_exit_code = 0;
+
+ /* GetCurrentThread returns a psuedo-handle, we need
+ * a real handle for another thread to wait upon.
+ */
+ if (!DuplicateHandle(hProc, hThread, hProc, &(globdat.mpm_thread),
+ 0, FALSE, DUPLICATE_SAME_ACCESS)) {
+ return APR_ENOTHREAD;
+ }
+
+ globdat.service_init = CreateEvent(NULL, FALSE, FALSE, NULL);
+ globdat.service_term = CreateMutex(NULL, TRUE, NULL);
+ if (!globdat.service_init || !globdat.service_term) {
+ return APR_EGENERAL;
+ }
+
+ globdat.service_thread = CreateThread(NULL, 65536,
+ service_nt_dispatch_thread,
+ NULL, stack_res_flag,
+ &globdat.service_thread_id);
+
+ if (!globdat.service_thread) {
+ return APR_ENOTHREAD;
+ }
+
+ waitfor[0] = globdat.service_init;
+ waitfor[1] = globdat.service_thread;
+
+ /* Wait for controlling thread init or termination */
+ if (WaitForMultipleObjects(2, waitfor, FALSE, 10000) != WAIT_OBJECT_0) {
+ return APR_ENOTHREAD;
+ }
+
+ atexit(service_stopped);
+ *display_name = mpm_display_name;
+ return APR_SUCCESS;
+}
+
+
+apr_status_t mpm_service_started(void)
+{
+ set_service_description();
+ ReportStatusToSCMgr(SERVICE_RUNNING, 0, &globdat);
+ return APR_SUCCESS;
+}
+
+
+void mpm_service_stopping(void)
+{
+ ReportStatusToSCMgr(SERVICE_STOP_PENDING, 30000, &globdat);
+}
+
+
+apr_status_t mpm_service_install(apr_pool_t *ptemp, int argc,
+ const char * const * argv, int reconfig)
+{
+ char key_name[MAX_PATH];
+ char *launch_cmd;
+ ap_regkey_t *key;
+ apr_status_t rv;
+ SC_HANDLE schService;
+ SC_HANDLE schSCManager;
+ DWORD rc;
+#if APR_HAS_UNICODE_FS
+ apr_wchar_t *display_name_w;
+ apr_wchar_t *launch_cmd_w;
+#endif
+
+ fprintf(stderr, reconfig ? "Reconfiguring the '%s' service\n"
+ : "Installing the '%s' service\n",
+ mpm_display_name);
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ apr_size_t slen = strlen(mpm_display_name) + 1;
+ apr_size_t wslen = slen;
+ display_name_w = apr_palloc(ptemp, wslen * sizeof(apr_wchar_t));
+ rv = apr_conv_utf8_to_ucs2(mpm_display_name, &slen,
+ display_name_w, &wslen);
+ if (rv != APR_SUCCESS)
+ return rv;
+ else if (slen)
+ return APR_ENAMETOOLONG;
+
+ launch_cmd_w = apr_palloc(ptemp, (MAX_PATH + 17) * sizeof(apr_wchar_t));
+ launch_cmd_w[0] = L'"';
+ rc = GetModuleFileNameW(NULL, launch_cmd_w + 1, MAX_PATH);
+ wcscpy(launch_cmd_w + rc + 1, L"\" -k runservice");
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ launch_cmd = apr_palloc(ptemp, MAX_PATH + 17);
+ launch_cmd[0] = '"';
+ rc = GetModuleFileName(NULL, launch_cmd + 1, MAX_PATH);
+ strcpy(launch_cmd + rc + 1, "\" -k runservice");
+ }
+#endif
+ if (rc == 0) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00368) "GetModuleFileName failed");
+ return rv;
+ }
+
+ schSCManager = OpenSCManager(NULL, NULL, /* local, default database */
+ SC_MANAGER_CREATE_SERVICE);
+ if (!schSCManager) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00369) "Failed to open the Windows service "
+ "manager, perhaps you forgot to log in as Administrator?");
+ return (rv);
+ }
+
+ if (reconfig) {
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ schService = OpenServiceW(schSCManager, mpm_service_name_w,
+ SERVICE_CHANGE_CONFIG);
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ schService = OpenService(schSCManager, mpm_service_name,
+ SERVICE_CHANGE_CONFIG);
+ }
+#endif
+ if (!schService) {
+ rv = apr_get_os_error();
+ CloseServiceHandle(schSCManager);
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00373) "Failed to open the '%s' service",
+ mpm_display_name);
+ return (rv);
+ }
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ rc = ChangeServiceConfigW(schService,
+ SERVICE_WIN32_OWN_PROCESS,
+ SERVICE_AUTO_START,
+ SERVICE_ERROR_NORMAL,
+ launch_cmd_w, NULL, NULL,
+ L"Tcpip\0Afd\0", NULL, NULL,
+ display_name_w);
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ rc = ChangeServiceConfig(schService,
+ SERVICE_WIN32_OWN_PROCESS,
+ SERVICE_AUTO_START,
+ SERVICE_ERROR_NORMAL,
+ launch_cmd, NULL, NULL,
+ "Tcpip\0Afd\0", NULL, NULL,
+ mpm_display_name);
+ }
+#endif
+ if (!rc) {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP,
+ apr_get_os_error(), NULL,
+ APLOGNO(02652) "ChangeServiceConfig failed");
+
+ /* !schService aborts configuration below */
+ CloseServiceHandle(schService);
+ schService = NULL;
+ }
+ }
+ else {
+ /* RPCSS is the Remote Procedure Call (RPC) Locator required
+ * for DCOM communication pipes. I am far from convinced we
+ * should add this to the default service dependencies, but
+ * be warned that future apache modules or ISAPI dll's may
+ * depend on it.
+ */
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ schService = CreateServiceW(schSCManager, // SCManager database
+ mpm_service_name_w, // name of service
+ display_name_w, // name to display
+ SERVICE_ALL_ACCESS, // access required
+ SERVICE_WIN32_OWN_PROCESS, // service type
+ SERVICE_AUTO_START, // start type
+ SERVICE_ERROR_NORMAL, // error control type
+ launch_cmd_w, // service's binary
+ NULL, // no load svc group
+ NULL, // no tag identifier
+ L"Tcpip\0Afd\0", // dependencies
+ NULL, // use SYSTEM account
+ NULL); // no password
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ schService = CreateService(schSCManager, // SCManager database
+ mpm_service_name, // name of service
+ mpm_display_name, // name to display
+ SERVICE_ALL_ACCESS, // access required
+ SERVICE_WIN32_OWN_PROCESS, // service type
+ SERVICE_AUTO_START, // start type
+ SERVICE_ERROR_NORMAL, // error control type
+ launch_cmd, // service's binary
+ NULL, // no load svc group
+ NULL, // no tag identifier
+ "Tcpip\0Afd\0", // dependencies
+ NULL, // use SYSTEM account
+ NULL); // no password
+ }
+#endif
+ if (!schService)
+ {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00370) "Failed to create the '%s' service",
+ mpm_display_name);
+ CloseServiceHandle(schSCManager);
+ return (rv);
+ }
+ }
+
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+
+ set_service_description();
+
+ /* Store the service ConfigArgs in the registry...
+ */
+ apr_snprintf(key_name, sizeof(key_name), SERVICEPARAMS, mpm_service_name);
+ rv = ap_regkey_open(&key, AP_REGKEY_LOCAL_MACHINE, key_name,
+ APR_READ | APR_WRITE | APR_CREATE, pconf);
+ if (rv == APR_SUCCESS) {
+ rv = ap_regkey_value_array_set(key, "ConfigArgs", argc, argv, pconf);
+ ap_regkey_close(key);
+ }
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00371) "Failed to store ConfigArgs for the "
+ "'%s' service in the registry.", mpm_display_name);
+ return (rv);
+ }
+ fprintf(stderr, "The '%s' service is successfully installed.\n",
+ mpm_display_name);
+ return APR_SUCCESS;
+}
+
+
+apr_status_t mpm_service_uninstall(void)
+{
+ apr_status_t rv;
+ SC_HANDLE schService;
+ SC_HANDLE schSCManager;
+
+ fprintf(stderr, "Removing the '%s' service\n", mpm_display_name);
+
+ schSCManager = OpenSCManager(NULL, NULL, /* local, default database */
+ SC_MANAGER_CONNECT);
+ if (!schSCManager) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(10009) "Failed to open the Windows service "
+ "manager, perhaps you forgot to log in as Administrator?");
+ return (rv);
+ }
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ schService = OpenServiceW(schSCManager, mpm_service_name_w, DELETE);
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ schService = OpenService(schSCManager, mpm_service_name, DELETE);
+ }
+#endif
+ if (!schService) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(10010) "Failed to open the '%s' service",
+ mpm_display_name);
+ return (rv);
+ }
+
+ /* assure the service is stopped before continuing
+ *
+ * This may be out of order... we might not be able to be
+ * granted all access if the service is running anyway.
+ *
+ * And do we want to make it *this easy* for them
+ * to uninstall their service unintentionally?
+ */
+ /* ap_stop_service(schService);
+ */
+
+ if (DeleteService(schService) == 0) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(00374) "Failed to delete the '%s' service",
+ mpm_display_name);
+ return (rv);
+ }
+
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+
+ fprintf(stderr, "The '%s' service has been removed successfully.\n",
+ mpm_display_name);
+ return APR_SUCCESS;
+}
+
+
+/* signal_service_transition is a simple thunk to signal the service
+ * and monitor its successful transition. If the signal passed is 0,
+ * then the caller is assumed to already have performed some service
+ * operation to be monitored (such as StartService), and no actual
+ * ControlService signal is sent.
+ */
+
+static int signal_service_transition(SC_HANDLE schService, DWORD signal,
+ DWORD pending, DWORD complete)
+{
+ if (signal && !ControlService(schService, signal, &globdat.ssStatus))
+ return FALSE;
+
+ do {
+ Sleep(1000);
+ if (!QueryServiceStatus(schService, &globdat.ssStatus))
+ return FALSE;
+ } while (globdat.ssStatus.dwCurrentState == pending);
+
+ return (globdat.ssStatus.dwCurrentState == complete);
+}
+
+
+apr_status_t mpm_service_start(apr_pool_t *ptemp, int argc,
+ const char * const * argv)
+{
+ apr_status_t rv;
+ SC_HANDLE schService;
+ SC_HANDLE schSCManager;
+
+ fprintf(stderr, "Starting the '%s' service\n", mpm_display_name);
+
+ schSCManager = OpenSCManager(NULL, NULL, /* local, default database */
+ SC_MANAGER_CONNECT);
+ if (!schSCManager) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(10011) "Failed to open the Windows service "
+ "manager, perhaps you forgot to log in as Administrator?");
+ return (rv);
+ }
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ schService = OpenServiceW(schSCManager, mpm_service_name_w,
+ SERVICE_START | SERVICE_QUERY_STATUS);
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ schService = OpenService(schSCManager, mpm_service_name,
+ SERVICE_START | SERVICE_QUERY_STATUS);
+ }
+#endif
+ if (!schService) {
+ rv = apr_get_os_error();
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, rv, NULL,
+ APLOGNO(10012) "Failed to open the '%s' service",
+ mpm_display_name);
+ CloseServiceHandle(schSCManager);
+ return (rv);
+ }
+
+ if (QueryServiceStatus(schService, &globdat.ssStatus)
+ && (globdat.ssStatus.dwCurrentState == SERVICE_RUNNING)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, 0, NULL,
+ APLOGNO(00377) "The '%s' service is already started!",
+ mpm_display_name);
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+ return 0;
+ }
+
+ rv = APR_EINIT;
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ LPWSTR *start_argv_w = malloc((argc + 1) * sizeof(LPCWSTR));
+ int i;
+
+ for (i = 0; i < argc; ++i)
+ {
+ apr_size_t slen = strlen(argv[i]) + 1;
+ apr_size_t wslen = slen;
+ start_argv_w[i] = malloc(wslen * sizeof(WCHAR));
+ rv = apr_conv_utf8_to_ucs2(argv[i], &slen, start_argv_w[i], &wslen);
+ if (rv != APR_SUCCESS)
+ return rv;
+ else if (slen)
+ return APR_ENAMETOOLONG;
+ }
+ start_argv_w[argc] = NULL;
+
+ if (StartServiceW(schService, argc, start_argv_w)
+ && signal_service_transition(schService, 0, /* test only */
+ SERVICE_START_PENDING,
+ SERVICE_RUNNING))
+ rv = APR_SUCCESS;
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ char **start_argv = malloc((argc + 1) * sizeof(const char *));
+ memcpy(start_argv, argv, argc * sizeof(const char *));
+ start_argv[argc] = NULL;
+
+ if (StartService(schService, argc, start_argv)
+ && signal_service_transition(schService, 0, /* test only */
+ SERVICE_START_PENDING,
+ SERVICE_RUNNING))
+ rv = APR_SUCCESS;
+ }
+#endif
+ if (rv != APR_SUCCESS)
+ rv = apr_get_os_error();
+
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+
+ if (rv == APR_SUCCESS)
+ fprintf(stderr, "The '%s' service is running.\n", mpm_display_name);
+ else
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00378)
+ "Failed to start the '%s' service",
+ mpm_display_name);
+
+ return rv;
+}
+
+
+/* signal is zero to stop, non-zero for restart */
+
+void mpm_signal_service(apr_pool_t *ptemp, int signal)
+{
+ int success = FALSE;
+ SC_HANDLE schService;
+ SC_HANDLE schSCManager;
+
+ schSCManager = OpenSCManager(NULL, NULL, /* default machine & database */
+ SC_MANAGER_CONNECT);
+
+ if (!schSCManager) {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP,
+ apr_get_os_error(), NULL,
+ APLOGNO(10013) "Failed to open the Windows service "
+ "manager, perhaps you forgot to log in as Administrator?");
+ return;
+ }
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ schService = OpenServiceW(schSCManager, mpm_service_name_w,
+ SERVICE_INTERROGATE | SERVICE_QUERY_STATUS |
+ SERVICE_USER_DEFINED_CONTROL |
+ SERVICE_START | SERVICE_STOP);
+ }
+#endif /* APR_HAS_UNICODE_FS */
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ schService = OpenService(schSCManager, mpm_service_name,
+ SERVICE_INTERROGATE | SERVICE_QUERY_STATUS |
+ SERVICE_USER_DEFINED_CONTROL |
+ SERVICE_START | SERVICE_STOP);
+ }
+#endif
+ if (schService == NULL) {
+ /* Could not open the service */
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP,
+ apr_get_os_error(), NULL,
+ APLOGNO(10014) "Failed to open the '%s' service",
+ mpm_display_name);
+ CloseServiceHandle(schSCManager);
+ return;
+ }
+
+ if (!QueryServiceStatus(schService, &globdat.ssStatus)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP,
+ apr_get_os_error(), NULL,
+ APLOGNO(00381) "Query of the '%s' service failed",
+ mpm_display_name);
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+ return;
+ }
+
+ if (!signal && (globdat.ssStatus.dwCurrentState == SERVICE_STOPPED)) {
+ fprintf(stderr, "The '%s' service is not started.\n", mpm_display_name);
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+ return;
+ }
+
+ fprintf(stderr, signal ? "The '%s' service is restarting.\n"
+ : "The '%s' service is stopping.\n",
+ mpm_display_name);
+
+ if (!signal)
+ success = signal_service_transition(schService,
+ SERVICE_CONTROL_STOP,
+ SERVICE_STOP_PENDING,
+ SERVICE_STOPPED);
+ else if (globdat.ssStatus.dwCurrentState == SERVICE_STOPPED) {
+ mpm_service_start(ptemp, 0, NULL);
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+ return;
+ }
+ else
+ success = signal_service_transition(schService,
+ SERVICE_APACHE_RESTART,
+ SERVICE_START_PENDING,
+ SERVICE_RUNNING);
+
+ CloseServiceHandle(schService);
+ CloseServiceHandle(schSCManager);
+
+ if (success)
+ fprintf(stderr, signal ? "The '%s' service has restarted.\n"
+ : "The '%s' service has stopped.\n",
+ mpm_display_name);
+ else
+ fprintf(stderr, signal ? "Failed to restart the '%s' service.\n"
+ : "Failed to stop the '%s' service.\n",
+ mpm_display_name);
+}
diff --git a/server/mpm/worker/Makefile.in b/server/mpm/worker/Makefile.in
new file mode 100644
index 0000000..e32210f
--- /dev/null
+++ b/server/mpm/worker/Makefile.in
@@ -0,0 +1,2 @@
+
+include $(top_srcdir)/build/special.mk
diff --git a/server/mpm/worker/config.m4 b/server/mpm/worker/config.m4
new file mode 100644
index 0000000..1a50026
--- /dev/null
+++ b/server/mpm/worker/config.m4
@@ -0,0 +1,11 @@
+AC_MSG_CHECKING(if worker MPM supports this platform)
+if test $forking_mpms_supported != yes; then
+ AC_MSG_RESULT(no - This is not a forking platform)
+elif test $ac_cv_define_APR_HAS_THREADS != yes; then
+ AC_MSG_RESULT(no - APR does not support threads)
+elif test $have_threaded_sig_graceful != yes; then
+ AC_MSG_RESULT(no - SIG_GRACEFUL cannot be used with a threaded MPM)
+else
+ AC_MSG_RESULT(yes)
+ APACHE_MPM_SUPPORTED(worker, yes, yes)
+fi
diff --git a/server/mpm/worker/config3.m4 b/server/mpm/worker/config3.m4
new file mode 100644
index 0000000..6c1eb17
--- /dev/null
+++ b/server/mpm/worker/config3.m4
@@ -0,0 +1,5 @@
+dnl ## XXX - Need a more thorough check of the proper flags to use
+
+APACHE_MPM_MODULE(worker, $enable_mpm_worker, worker.lo,[
+ AC_CHECK_FUNCS(pthread_kill)
+])
diff --git a/server/mpm/worker/mpm_default.h b/server/mpm/worker/mpm_default.h
new file mode 100644
index 0000000..464250e
--- /dev/null
+++ b/server/mpm/worker/mpm_default.h
@@ -0,0 +1,55 @@
+/* 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 worker/mpm_default.h
+ * @brief Worker MPM defaults
+ *
+ * @defgroup APACHE_MPM_WORKER Worker MPM
+ * @ingroup APACHE_INTERNAL
+ * @{
+ */
+
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Number of servers to spawn off by default --- also, if fewer than
+ * this free when the caretaker checks, it will spawn more.
+ */
+#ifndef DEFAULT_START_DAEMON
+#define DEFAULT_START_DAEMON 3
+#endif
+
+/* Maximum number of *free* server processes --- more than this, and
+ * they will die off.
+ */
+
+#ifndef DEFAULT_MAX_FREE_DAEMON
+#define DEFAULT_MAX_FREE_DAEMON 10
+#endif
+
+/* Minimum --- fewer than this, and more will be created */
+
+#ifndef DEFAULT_MIN_FREE_DAEMON
+#define DEFAULT_MIN_FREE_DAEMON 3
+#endif
+
+#ifndef DEFAULT_THREADS_PER_CHILD
+#define DEFAULT_THREADS_PER_CHILD 25
+#endif
+
+#endif /* AP_MPM_DEFAULT_H */
+/** @} */
diff --git a/server/mpm/worker/worker.c b/server/mpm/worker/worker.c
new file mode 100644
index 0000000..7b572bd
--- /dev/null
+++ b/server/mpm/worker/worker.c
@@ -0,0 +1,2455 @@
+/* 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.
+ */
+
+/* The purpose of this MPM is to fix the design flaws in the threaded
+ * model. Because of the way that pthreads and mutex locks interact,
+ * it is basically impossible to cleanly gracefully shutdown a child
+ * process if multiple threads are all blocked in accept. This model
+ * fixes those problems.
+ */
+
+#include "apr.h"
+#include "apr_portable.h"
+#include "apr_strings.h"
+#include "apr_file_io.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+#include "apr_thread_mutex.h"
+#include "apr_proc_mutex.h"
+#include "apr_poll.h"
+
+#include <stdlib.h>
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if APR_HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+#ifdef HAVE_SYS_PROCESSOR_H
+#include <sys/processor.h> /* for bindprocessor() */
+#endif
+
+#if !APR_HAS_THREADS
+#error The Worker MPM requires APR threads, but they are unavailable.
+#endif
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h" /* for read_config */
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "ap_mpm.h"
+#include "mpm_common.h"
+#include "ap_listen.h"
+#include "scoreboard.h"
+#include "mpm_fdqueue.h"
+#include "mpm_default.h"
+#include "util_mutex.h"
+#include "unixd.h"
+
+#include <signal.h>
+#include <limits.h> /* for INT_MAX */
+
+/* Limit on the total --- clients will be locked out if more servers than
+ * this are needed. It is intended solely to keep the server from crashing
+ * when things get out of hand.
+ *
+ * We keep a hard maximum number of servers, for two reasons --- first off,
+ * in case something goes seriously wrong, we want to stop the fork bomb
+ * short of actually crashing the machine we're running on by filling some
+ * kernel table. Secondly, it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_SERVER_LIMIT
+#define DEFAULT_SERVER_LIMIT 16
+#endif
+
+/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_SERVER_LIMIT
+#define MAX_SERVER_LIMIT 20000
+#endif
+
+/* Limit on the threads per process. Clients will be locked out if more than
+ * this * server_limit are needed.
+ *
+ * We keep this for one reason it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_THREAD_LIMIT
+#define DEFAULT_THREAD_LIMIT 64
+#endif
+
+/* Admin can't tune ThreadLimit beyond MAX_THREAD_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_THREAD_LIMIT
+#define MAX_THREAD_LIMIT 20000
+#endif
+
+/*
+ * Actual definitions of config globals
+ */
+
+static int threads_per_child = 0; /* Worker threads per child */
+static int ap_daemons_to_start = 0;
+static int min_spare_threads = 0;
+static int max_spare_threads = 0;
+static int ap_daemons_limit = 0;
+static int max_workers = 0;
+static int server_limit = 0;
+static int thread_limit = 0;
+static int had_healthy_child = 0;
+static int dying = 0;
+static int workers_may_exit = 0;
+static int start_thread_may_exit = 0;
+static int listener_may_exit = 0;
+static int requests_this_child;
+static int num_listensocks = 0;
+static int resource_shortage = 0;
+static fd_queue_t *worker_queue;
+static fd_queue_info_t *worker_queue_info;
+static apr_pollset_t *worker_pollset;
+
+
+/* data retained by worker across load/unload of the module
+ * allocated on first call to pre-config hook; located on
+ * subsequent calls to pre-config hook
+ */
+typedef struct worker_retained_data {
+ ap_unixd_mpm_retained_data *mpm;
+
+ int first_server_limit;
+ int first_thread_limit;
+ int sick_child_detected;
+ int maxclients_reported;
+ int near_maxclients_reported;
+ /*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxRequestWorkers changes across AP_SIG_GRACEFUL restarts.
+ * We use this value to optimize routines that have to scan the entire
+ * scoreboard.
+ */
+ int max_daemons_limit;
+ /*
+ * idle_spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers. It is
+ * maintained per listeners bucket, doubled up to MAX_SPAWN_RATE, and
+ * reset only when a cycle goes by without the need to spawn.
+ */
+ int *idle_spawn_rate;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (32)
+#endif
+ int hold_off_on_exponential_spawning;
+} worker_retained_data;
+static worker_retained_data *retained;
+
+typedef struct worker_child_bucket {
+ ap_pod_t *pod;
+ ap_listen_rec *listeners;
+ apr_proc_mutex_t *mutex;
+} worker_child_bucket;
+static worker_child_bucket *all_buckets, /* All listeners buckets */
+ *my_bucket; /* Current child bucket */
+
+#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
+
+/* The structure used to pass unique initialization info to each thread */
+typedef struct {
+ int pid;
+ int tid;
+ int sd;
+} proc_info;
+
+/* Structure used to pass information to the thread responsible for
+ * creating the rest of the threads.
+ */
+typedef struct {
+ apr_thread_t **threads;
+ apr_thread_t *listener;
+ int child_num_arg;
+ apr_threadattr_t *threadattr;
+} thread_starter;
+
+#define ID_FROM_CHILD_THREAD(c, t) ((c * thread_limit) + t)
+
+/* The worker MPM respects a couple of runtime flags that can aid
+ * in debugging. Setting the -DNO_DETACH flag will prevent the root process
+ * from detaching from its controlling terminal. Additionally, setting
+ * the -DONE_PROCESS flag (which implies -DNO_DETACH) will get you the
+ * child_main loop running in the process which originally started up.
+ * This gives you a pretty nice debugging environment. (You'll get a SIGHUP
+ * early in standalone_main; just continue through. This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+#ifdef DEBUG_SIGSTOP
+int raise_sigstop_flags;
+#endif
+
+static apr_pool_t *pconf; /* Pool for config stuff */
+static apr_pool_t *pchild; /* Pool for httpd child stuff */
+static apr_pool_t *pruntime; /* Pool for MPM threads stuff */
+
+static pid_t ap_my_pid; /* Linux getpid() doesn't work except in main
+ thread. Use this instead */
+static pid_t parent_pid;
+static apr_os_thread_t *listener_os_thread;
+
+#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+#define SAFE_ACCEPT(stmt) (ap_listeners->next ? (stmt) : APR_SUCCESS)
+#else
+#define SAFE_ACCEPT(stmt) (stmt)
+#endif
+
+/* The LISTENER_SIGNAL signal will be sent from the main thread to the
+ * listener thread to wake it up for graceful termination (what a child
+ * process from an old generation does when the admin does "apachectl
+ * graceful"). This signal will be blocked in all threads of a child
+ * process except for the listener thread.
+ */
+#define LISTENER_SIGNAL SIGHUP
+
+/* The WORKER_SIGNAL signal will be sent from the main thread to the
+ * worker threads during an ungraceful restart or shutdown.
+ * This ensures that on systems (i.e., Linux) where closing the worker
+ * socket doesn't awake the worker thread when it is polling on the socket
+ * (especially in apr_wait_for_io_or_timeout() when handling
+ * Keep-Alive connections), close_worker_sockets() and join_workers()
+ * still function in timely manner and allow ungraceful shutdowns to
+ * proceed to completion. Otherwise join_workers() doesn't return
+ * before the main process decides the child process is non-responsive
+ * and sends a SIGKILL.
+ */
+#define WORKER_SIGNAL AP_SIG_GRACEFUL
+
+/* An array of socket descriptors in use by each thread used to
+ * perform a non-graceful (forced) shutdown of the server. */
+static apr_socket_t **worker_sockets;
+
+static void close_worker_sockets(void)
+{
+ int i;
+ for (i = 0; i < threads_per_child; i++) {
+ if (worker_sockets[i]) {
+ apr_socket_close(worker_sockets[i]);
+ worker_sockets[i] = NULL;
+ }
+ }
+}
+
+static void wakeup_listener(void)
+{
+ listener_may_exit = 1;
+ if (!listener_os_thread) {
+ /* XXX there is an obscure path that this doesn't handle perfectly:
+ * right after listener thread is created but before
+ * listener_os_thread is set, the first worker thread hits an
+ * error and starts graceful termination
+ */
+ return;
+ }
+
+ /* unblock the listener if it's waiting for a worker */
+ ap_queue_info_term(worker_queue_info);
+
+ /*
+ * we should just be able to "kill(ap_my_pid, LISTENER_SIGNAL)" on all
+ * platforms and wake up the listener thread since it is the only thread
+ * with SIGHUP unblocked, but that doesn't work on Linux
+ */
+#ifdef HAVE_PTHREAD_KILL
+ pthread_kill(*listener_os_thread, LISTENER_SIGNAL);
+#else
+ kill(ap_my_pid, LISTENER_SIGNAL);
+#endif
+}
+
+#define ST_INIT 0
+#define ST_GRACEFUL 1
+#define ST_UNGRACEFUL 2
+
+static int terminate_mode = ST_INIT;
+
+static void signal_threads(int mode)
+{
+ if (terminate_mode == mode) {
+ return;
+ }
+ terminate_mode = mode;
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+
+ /* in case we weren't called from the listener thread, wake up the
+ * listener thread
+ */
+ wakeup_listener();
+
+ /* for ungraceful termination, let the workers exit now;
+ * for graceful termination, the listener thread will notify the
+ * workers to exit once it has stopped accepting new connections
+ */
+ if (mode == ST_UNGRACEFUL) {
+ workers_may_exit = 1;
+ ap_queue_interrupt_all(worker_queue);
+ close_worker_sockets(); /* forcefully kill all current connections */
+ }
+
+ ap_run_child_stopping(pchild, mode == ST_GRACEFUL);
+}
+
+static int worker_query(int query_code, int *result, apr_status_t *rv)
+{
+ *rv = APR_SUCCESS;
+ switch (query_code) {
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = retained->max_daemons_limit;
+ break;
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_STATIC;
+ break;
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_DYNAMIC;
+ break;
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = server_limit;
+ break;
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = thread_limit;
+ break;
+ case AP_MPMQ_MAX_THREADS:
+ *result = threads_per_child;
+ break;
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MIN_SPARE_THREADS:
+ *result = min_spare_threads;
+ break;
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_THREADS:
+ *result = max_spare_threads;
+ break;
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = ap_max_requests_per_child;
+ break;
+ case AP_MPMQ_MAX_DAEMONS:
+ *result = ap_daemons_limit;
+ break;
+ case AP_MPMQ_MPM_STATE:
+ *result = retained->mpm->mpm_state;
+ break;
+ case AP_MPMQ_GENERATION:
+ *result = retained->mpm->my_generation;
+ break;
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+ return OK;
+}
+
+static void worker_note_child_killed(int childnum, pid_t pid, ap_generation_t gen)
+{
+ if (childnum != -1) { /* child had a scoreboard slot? */
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[childnum].pid,
+ ap_scoreboard_image->parent[childnum].generation,
+ childnum, MPM_CHILD_EXITED);
+ ap_scoreboard_image->parent[childnum].pid = 0;
+ }
+ else {
+ ap_run_child_status(ap_server_conf, pid, gen, -1, MPM_CHILD_EXITED);
+ }
+}
+
+static void worker_note_child_started(int slot, pid_t pid)
+{
+ ap_generation_t gen = retained->mpm->my_generation;
+ ap_scoreboard_image->parent[slot].pid = pid;
+ ap_scoreboard_image->parent[slot].generation = gen;
+ ap_run_child_status(ap_server_conf, pid, gen, slot, MPM_CHILD_STARTED);
+}
+
+static void worker_note_child_lost_slot(int slot, pid_t newpid)
+{
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00263)
+ "pid %" APR_PID_T_FMT " taking over scoreboard slot from "
+ "%" APR_PID_T_FMT "%s",
+ newpid,
+ ap_scoreboard_image->parent[slot].pid,
+ ap_scoreboard_image->parent[slot].quiescing ?
+ " (quiescing)" : "");
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[slot].pid,
+ ap_scoreboard_image->parent[slot].generation,
+ slot, MPM_CHILD_LOST_SLOT);
+ /* Don't forget about this exiting child process, or we
+ * won't be able to kill it if it doesn't exit by the
+ * time the server is shut down.
+ */
+ ap_register_extra_mpm_process(ap_scoreboard_image->parent[slot].pid,
+ ap_scoreboard_image->parent[slot].generation);
+}
+
+static const char *worker_get_name(void)
+{
+ return "worker";
+}
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code) __attribute__ ((noreturn));
+static void clean_child_exit(int code)
+{
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ if (terminate_mode == ST_INIT) {
+ ap_run_child_stopping(pchild, 0);
+ }
+
+ if (pchild) {
+ apr_pool_destroy(pchild);
+ }
+
+ if (one_process) {
+ worker_note_child_killed(/* slot */ 0, 0, 0);
+ }
+
+ exit(code);
+}
+
+static void just_die(int sig)
+{
+ clean_child_exit(0);
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static int child_fatal;
+
+/*****************************************************************
+ * Here follows a long bunch of generic server bookkeeping stuff...
+ */
+
+/*****************************************************************
+ * Child process main loop.
+ */
+
+static void process_socket(apr_thread_t *thd, apr_pool_t *p, apr_socket_t *sock,
+ int my_child_num,
+ int my_thread_num, apr_bucket_alloc_t *bucket_alloc)
+{
+ conn_rec *current_conn;
+ long conn_id = ID_FROM_CHILD_THREAD(my_child_num, my_thread_num);
+ ap_sb_handle_t *sbh;
+
+ ap_create_sb_handle(&sbh, p, my_child_num, my_thread_num);
+
+ current_conn = ap_run_create_connection(p, ap_server_conf, sock,
+ conn_id, sbh, bucket_alloc);
+ if (current_conn) {
+ current_conn->current_thread = thd;
+ ap_process_connection(current_conn, sock);
+ ap_lingering_close(current_conn);
+ }
+}
+
+/* requests_this_child has gone to zero or below. See if the admin coded
+ "MaxConnectionsPerChild 0", and keep going in that case. Doing it this way
+ simplifies the hot path in worker_thread */
+static void check_infinite_requests(void)
+{
+ if (ap_max_requests_per_child) {
+ signal_threads(ST_GRACEFUL);
+ }
+ else {
+ requests_this_child = INT_MAX; /* keep going */
+ }
+}
+
+static void unblock_signal(int sig)
+{
+ sigset_t sig_mask;
+
+ sigemptyset(&sig_mask);
+ sigaddset(&sig_mask, sig);
+#if defined(SIGPROCMASK_SETS_THREAD_MASK)
+ sigprocmask(SIG_UNBLOCK, &sig_mask, NULL);
+#else
+ pthread_sigmask(SIG_UNBLOCK, &sig_mask, NULL);
+#endif
+}
+
+static void dummy_signal_handler(int sig)
+{
+ /* XXX If specifying SIG_IGN is guaranteed to unblock a syscall,
+ * then we don't need this goofy function.
+ */
+}
+
+static void accept_mutex_error(const char *func, apr_status_t rv, int process_slot)
+{
+ int level = APLOG_EMERG;
+
+ if (ap_scoreboard_image->parent[process_slot].generation !=
+ ap_scoreboard_image->global->running_generation) {
+ level = APLOG_DEBUG; /* common to get these at restart time */
+ }
+ else if (requests_this_child == INT_MAX
+ || ((requests_this_child == ap_max_requests_per_child)
+ && ap_max_requests_per_child)) {
+ ap_log_error(APLOG_MARK, level, rv, ap_server_conf, APLOGNO(00272)
+ "apr_proc_mutex_%s failed "
+ "before this child process served any requests.",
+ func);
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ ap_log_error(APLOG_MARK, level, rv, ap_server_conf, APLOGNO(00273)
+ "apr_proc_mutex_%s failed. Attempting to "
+ "shutdown process gracefully.", func);
+ signal_threads(ST_GRACEFUL);
+}
+
+static void * APR_THREAD_FUNC listener_thread(apr_thread_t *thd, void * dummy)
+{
+ proc_info * ti = dummy;
+ int process_slot = ti->pid;
+ void *csd = NULL;
+ apr_pool_t *ptrans = NULL; /* Pool for per-transaction stuff */
+ apr_status_t rv;
+ ap_listen_rec *lr = NULL;
+ int have_idle_worker = 0;
+ int last_poll_idx = 0;
+
+ free(ti);
+
+ /* Unblock the signal used to wake this thread up, and set a handler for
+ * it.
+ */
+ apr_signal(LISTENER_SIGNAL, dummy_signal_handler);
+ unblock_signal(LISTENER_SIGNAL);
+
+ /* TODO: Switch to a system where threads reuse the results from earlier
+ poll calls - manoj */
+ while (1) {
+ /* TODO: requests_this_child should be synchronized - aaron */
+ if (requests_this_child <= 0) {
+ check_infinite_requests();
+ }
+ if (listener_may_exit) break;
+
+ if (!have_idle_worker) {
+ rv = ap_queue_info_wait_for_idler(worker_queue_info, NULL);
+ if (APR_STATUS_IS_EOF(rv)) {
+ break; /* we've been signaled to die now */
+ }
+ else if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
+ "apr_queue_info_wait failed. Attempting to "
+ " shutdown process gracefully.");
+ signal_threads(ST_GRACEFUL);
+ break;
+ }
+ have_idle_worker = 1;
+ }
+
+ /* We've already decremented the idle worker count inside
+ * ap_queue_info_wait_for_idler. */
+
+ if ((rv = SAFE_ACCEPT(apr_proc_mutex_lock(my_bucket->mutex)))
+ != APR_SUCCESS) {
+
+ if (!listener_may_exit) {
+ accept_mutex_error("lock", rv, process_slot);
+ }
+ break; /* skip the lock release */
+ }
+
+ if (!my_bucket->listeners->next) {
+ /* Only one listener, so skip the poll */
+ lr = my_bucket->listeners;
+ }
+ else {
+ while (!listener_may_exit) {
+ apr_int32_t numdesc;
+ const apr_pollfd_t *pdesc;
+
+ rv = apr_pollset_poll(worker_pollset, -1, &numdesc, &pdesc);
+ if (rv != APR_SUCCESS) {
+ if (APR_STATUS_IS_EINTR(rv)) {
+ continue;
+ }
+
+ /* apr_pollset_poll() will only return errors in catastrophic
+ * circumstances. Let's try exiting gracefully, for now. */
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(03137)
+ "apr_pollset_poll: (listen)");
+ signal_threads(ST_GRACEFUL);
+ }
+
+ if (listener_may_exit) break;
+
+ /* We can always use pdesc[0], but sockets at position N
+ * could end up completely starved of attention in a very
+ * busy server. Therefore, we round-robin across the
+ * returned set of descriptors. While it is possible that
+ * the returned set of descriptors might flip around and
+ * continue to starve some sockets, we happen to know the
+ * internal pollset implementation retains ordering
+ * stability of the sockets. Thus, the round-robin should
+ * ensure that a socket will eventually be serviced.
+ */
+ if (last_poll_idx >= numdesc)
+ last_poll_idx = 0;
+
+ /* Grab a listener record from the client_data of the poll
+ * descriptor, and advance our saved index to round-robin
+ * the next fetch.
+ *
+ * ### hmm... this descriptor might have POLLERR rather
+ * ### than POLLIN
+ */
+ lr = pdesc[last_poll_idx++].client_data;
+ break;
+
+ } /* while */
+
+ } /* if/else */
+
+ if (!listener_may_exit) {
+ /* the following pops a recycled ptrans pool off a stack */
+ ap_queue_info_pop_pool(worker_queue_info, &ptrans);
+ if (ptrans == NULL) {
+ /* we can't use a recycled transaction pool this time.
+ * create a new transaction pool */
+ apr_allocator_t *allocator;
+
+ apr_allocator_create(&allocator);
+ apr_allocator_max_free_set(allocator, ap_max_mem_free);
+ apr_pool_create_ex(&ptrans, pconf, NULL, allocator);
+ apr_allocator_owner_set(allocator, ptrans);
+ apr_pool_tag(ptrans, "transaction");
+ }
+ rv = lr->accept_func(&csd, lr, ptrans);
+ /* later we trash rv and rely on csd to indicate success/failure */
+ AP_DEBUG_ASSERT(rv == APR_SUCCESS || !csd);
+
+ if (rv == APR_EGENERAL) {
+ /* E[NM]FILE, ENOMEM, etc */
+ resource_shortage = 1;
+ signal_threads(ST_GRACEFUL);
+ }
+ if ((rv = SAFE_ACCEPT(apr_proc_mutex_unlock(my_bucket->mutex)))
+ != APR_SUCCESS) {
+
+ if (listener_may_exit) {
+ break;
+ }
+ accept_mutex_error("unlock", rv, process_slot);
+ }
+ if (csd != NULL) {
+ rv = ap_queue_push_socket(worker_queue, csd, NULL, ptrans);
+ if (rv) {
+ /* trash the connection; we couldn't queue the connected
+ * socket to a worker
+ */
+ apr_socket_close(csd);
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(03138)
+ "ap_queue_push_socket failed");
+ }
+ else {
+ have_idle_worker = 0;
+ }
+ }
+ }
+ else {
+ if ((rv = SAFE_ACCEPT(apr_proc_mutex_unlock(my_bucket->mutex)))
+ != APR_SUCCESS) {
+ int level = APLOG_EMERG;
+
+ if (ap_scoreboard_image->parent[process_slot].generation !=
+ ap_scoreboard_image->global->running_generation) {
+ level = APLOG_DEBUG; /* common to get these at restart time */
+ }
+ ap_log_error(APLOG_MARK, level, rv, ap_server_conf, APLOGNO(00274)
+ "apr_proc_mutex_unlock failed. Attempting to "
+ "shutdown process gracefully.");
+ signal_threads(ST_GRACEFUL);
+ }
+ break;
+ }
+ }
+
+ ap_close_listeners_ex(my_bucket->listeners);
+ ap_queue_info_free_idle_pools(worker_queue_info);
+ ap_queue_term(worker_queue);
+ dying = 1;
+ ap_scoreboard_image->parent[process_slot].quiescing = 1;
+
+ /* wake up the main thread */
+ kill(ap_my_pid, SIGTERM);
+
+ apr_thread_exit(thd, APR_SUCCESS);
+ return NULL;
+}
+
+/* XXX For ungraceful termination/restart, we definitely don't want to
+ * wait for active connections to finish but we may want to wait
+ * for idle workers to get out of the queue code and release mutexes,
+ * since those mutexes are cleaned up pretty soon and some systems
+ * may not react favorably (i.e., segfault) if operations are attempted
+ * on cleaned-up mutexes.
+ */
+static void * APR_THREAD_FUNC worker_thread(apr_thread_t *thd, void * dummy)
+{
+ proc_info * ti = dummy;
+ int process_slot = ti->pid;
+ int thread_slot = ti->tid;
+ apr_socket_t *csd = NULL;
+ apr_bucket_alloc_t *bucket_alloc;
+ apr_pool_t *last_ptrans = NULL;
+ apr_pool_t *ptrans; /* Pool for per-transaction stuff */
+ apr_status_t rv;
+ int is_idle = 0;
+
+ free(ti);
+
+ ap_scoreboard_image->servers[process_slot][thread_slot].pid = ap_my_pid;
+ ap_scoreboard_image->servers[process_slot][thread_slot].tid = apr_os_thread_current();
+ ap_scoreboard_image->servers[process_slot][thread_slot].generation = retained->mpm->my_generation;
+ ap_update_child_status_from_indexes(process_slot, thread_slot,
+ SERVER_STARTING, NULL);
+
+#ifdef HAVE_PTHREAD_KILL
+ apr_signal(WORKER_SIGNAL, dummy_signal_handler);
+ unblock_signal(WORKER_SIGNAL);
+#endif
+
+ while (!workers_may_exit) {
+ if (!is_idle) {
+ rv = ap_queue_info_set_idle(worker_queue_info, last_ptrans);
+ last_ptrans = NULL;
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
+ "ap_queue_info_set_idle failed. Attempting to "
+ "shutdown process gracefully.");
+ signal_threads(ST_GRACEFUL);
+ break;
+ }
+ is_idle = 1;
+ }
+
+ ap_update_child_status_from_indexes(process_slot, thread_slot,
+ SERVER_READY, NULL);
+worker_pop:
+ if (workers_may_exit) {
+ break;
+ }
+ rv = ap_queue_pop_socket(worker_queue, &csd, &ptrans);
+
+ if (rv != APR_SUCCESS) {
+ /* We get APR_EOF during a graceful shutdown once all the connections
+ * accepted by this server process have been handled.
+ */
+ if (APR_STATUS_IS_EOF(rv)) {
+ break;
+ }
+ /* We get APR_EINTR whenever ap_queue_pop_*() has been interrupted
+ * from an explicit call to ap_queue_interrupt_all(). This allows
+ * us to unblock threads stuck in ap_queue_pop_*() when a shutdown
+ * is pending.
+ *
+ * If workers_may_exit is set and this is ungraceful termination/
+ * restart, we are bound to get an error on some systems (e.g.,
+ * AIX, which sanity-checks mutex operations) since the queue
+ * may have already been cleaned up. Don't log the "error" if
+ * workers_may_exit is set.
+ */
+ else if (APR_STATUS_IS_EINTR(rv)) {
+ goto worker_pop;
+ }
+ /* We got some other error. */
+ else if (!workers_may_exit) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(03139)
+ "ap_queue_pop_socket failed");
+ }
+ continue;
+ }
+ is_idle = 0;
+ worker_sockets[thread_slot] = csd;
+ bucket_alloc = apr_bucket_alloc_create(ptrans);
+ process_socket(thd, ptrans, csd, process_slot, thread_slot, bucket_alloc);
+ worker_sockets[thread_slot] = NULL;
+ requests_this_child--;
+ apr_pool_clear(ptrans);
+ last_ptrans = ptrans;
+ }
+
+ ap_update_child_status_from_indexes(process_slot, thread_slot,
+ dying ? SERVER_DEAD
+ : SERVER_GRACEFUL, NULL);
+
+ apr_thread_exit(thd, APR_SUCCESS);
+ return NULL;
+}
+
+static int check_signal(int signum)
+{
+ switch (signum) {
+ case SIGTERM:
+ case SIGINT:
+ return 1;
+ }
+ return 0;
+}
+
+static void create_listener_thread(thread_starter *ts)
+{
+ int my_child_num = ts->child_num_arg;
+ apr_threadattr_t *thread_attr = ts->threadattr;
+ proc_info *my_info;
+ apr_status_t rv;
+
+ my_info = (proc_info *)ap_malloc(sizeof(proc_info));
+ my_info->pid = my_child_num;
+ my_info->tid = -1; /* listener thread doesn't have a thread slot */
+ my_info->sd = 0;
+ rv = ap_thread_create(&ts->listener, thread_attr, listener_thread,
+ my_info, pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(00275)
+ "ap_thread_create: unable to create listener thread");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ apr_os_thread_get(&listener_os_thread, ts->listener);
+}
+
+static void setup_threads_runtime(void)
+{
+ ap_listen_rec *lr;
+ apr_status_t rv;
+
+ /* All threads (listener, workers) and synchronization objects (queues,
+ * pollset, mutexes...) created here should have at least the lifetime of
+ * the connections they handle (i.e. ptrans). We can't use this thread's
+ * self pool because all these objects survive it, nor use pchild or pconf
+ * directly because this starter thread races with other modules' runtime,
+ * nor finally pchild (or subpool thereof) because it is killed explicitly
+ * before pconf (thus connections/ptrans can live longer, which matters in
+ * ONE_PROCESS mode). So this leaves us with a subpool of pconf, created
+ * before any ptrans hence destroyed after.
+ */
+ apr_pool_create(&pruntime, pconf);
+ apr_pool_tag(pruntime, "mpm_runtime");
+
+ /* We must create the fd queues before we start up the listener
+ * and worker threads. */
+ rv = ap_queue_create(&worker_queue, threads_per_child, pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(03140)
+ "ap_queue_create() failed");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ rv = ap_queue_info_create(&worker_queue_info, pruntime,
+ threads_per_child, -1);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(03141)
+ "ap_queue_info_create() failed");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Create the main pollset */
+ rv = apr_pollset_create(&worker_pollset, num_listensocks, pruntime,
+ APR_POLLSET_NOCOPY);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(03285)
+ "Couldn't create pollset in thread;"
+ " check system or user limits");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+
+ for (lr = my_bucket->listeners; lr != NULL; lr = lr->next) {
+ apr_pollfd_t *pfd = apr_pcalloc(pruntime, sizeof *pfd);
+
+ pfd->desc_type = APR_POLL_SOCKET;
+ pfd->desc.s = lr->sd;
+ pfd->reqevents = APR_POLLIN;
+ pfd->client_data = lr;
+
+ rv = apr_pollset_add(worker_pollset, pfd);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(03286)
+ "Couldn't create add listener to pollset;"
+ " check system or user limits");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+
+ lr->accept_func = ap_unixd_accept;
+ }
+
+ worker_sockets = apr_pcalloc(pruntime, threads_per_child *
+ sizeof(apr_socket_t *));
+}
+
+/* XXX under some circumstances not understood, children can get stuck
+ * in start_threads forever trying to take over slots which will
+ * never be cleaned up; for now there is an APLOG_DEBUG message issued
+ * every so often when this condition occurs
+ */
+static void * APR_THREAD_FUNC start_threads(apr_thread_t *thd, void *dummy)
+{
+ thread_starter *ts = dummy;
+ apr_thread_t **threads = ts->threads;
+ apr_threadattr_t *thread_attr = ts->threadattr;
+ int my_child_num = ts->child_num_arg;
+ proc_info *my_info;
+ apr_status_t rv;
+ int threads_created = 0;
+ int listener_started = 0;
+ int prev_threads_created;
+ int loops, i;
+
+ loops = prev_threads_created = 0;
+ while (1) {
+ /* threads_per_child does not include the listener thread */
+ for (i = 0; i < threads_per_child; i++) {
+ int status = ap_scoreboard_image->servers[my_child_num][i].status;
+
+ if (status != SERVER_GRACEFUL && status != SERVER_DEAD) {
+ continue;
+ }
+
+ my_info = (proc_info *)ap_malloc(sizeof(proc_info));
+ my_info->pid = my_child_num;
+ my_info->tid = i;
+ my_info->sd = 0;
+
+ /* We are creating threads right now */
+ ap_update_child_status_from_indexes(my_child_num, i,
+ SERVER_STARTING, NULL);
+ /* We let each thread update its own scoreboard entry. This is
+ * done because it lets us deal with tid better.
+ */
+ rv = ap_thread_create(&threads[i], thread_attr,
+ worker_thread, my_info, pruntime);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(03142)
+ "ap_thread_create: unable to create worker thread");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ threads_created++;
+ }
+ /* Start the listener only when there are workers available */
+ if (!listener_started && threads_created) {
+ create_listener_thread(ts);
+ listener_started = 1;
+ }
+ if (start_thread_may_exit || threads_created == threads_per_child) {
+ break;
+ }
+ /* wait for previous generation to clean up an entry */
+ apr_sleep(apr_time_from_sec(1));
+ ++loops;
+ if (loops % 120 == 0) { /* every couple of minutes */
+ if (prev_threads_created == threads_created) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+ "child %" APR_PID_T_FMT " isn't taking over "
+ "slots very quickly (%d of %d)",
+ ap_my_pid, threads_created, threads_per_child);
+ }
+ prev_threads_created = threads_created;
+ }
+ }
+
+ /* What state should this child_main process be listed as in the
+ * scoreboard...?
+ * ap_update_child_status_from_indexes(my_child_num, i, SERVER_STARTING,
+ * (request_rec *) NULL);
+ *
+ * This state should be listed separately in the scoreboard, in some kind
+ * of process_status, not mixed in with the worker threads' status.
+ * "life_status" is almost right, but it's in the worker's structure, and
+ * the name could be clearer. gla
+ */
+ apr_thread_exit(thd, APR_SUCCESS);
+ return NULL;
+}
+
+static void join_workers(apr_thread_t *listener, apr_thread_t **threads,
+ int mode)
+{
+ int i;
+ apr_status_t rv, thread_rv;
+
+ if (listener) {
+ int iter;
+
+ /* deal with a rare timing window which affects waking up the
+ * listener thread... if the signal sent to the listener thread
+ * is delivered between the time it verifies that the
+ * listener_may_exit flag is clear and the time it enters a
+ * blocking syscall, the signal didn't do any good... work around
+ * that by sleeping briefly and sending it again
+ */
+
+ iter = 0;
+ while (iter < 10 &&
+#ifdef HAVE_PTHREAD_KILL
+ pthread_kill(*listener_os_thread, 0)
+#else
+ kill(ap_my_pid, 0)
+#endif
+ == 0) {
+ /* listener not dead yet */
+ apr_sleep(apr_time_make(0, 500000));
+ wakeup_listener();
+ ++iter;
+ }
+ if (iter >= 10) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00276)
+ "the listener thread didn't exit");
+ }
+ else {
+ rv = apr_thread_join(&thread_rv, listener);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00277)
+ "apr_thread_join: unable to join listener thread");
+ }
+ }
+ }
+
+ for (i = 0; i < threads_per_child; i++) {
+ if (threads[i]) { /* if we ever created this thread */
+ if (mode != ST_GRACEFUL) {
+#ifdef HAVE_PTHREAD_KILL
+ apr_os_thread_t *worker_os_thread;
+
+ apr_os_thread_get(&worker_os_thread, threads[i]);
+ pthread_kill(*worker_os_thread, WORKER_SIGNAL);
+#endif
+ }
+
+ rv = apr_thread_join(&thread_rv, threads[i]);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00278)
+ "apr_thread_join: unable to join worker "
+ "thread %d",
+ i);
+ }
+ }
+ }
+}
+
+static void join_start_thread(apr_thread_t *start_thread_id)
+{
+ apr_status_t rv, thread_rv;
+
+ start_thread_may_exit = 1; /* tell it to give up in case it is still
+ * trying to take over slots from a
+ * previous generation
+ */
+ rv = apr_thread_join(&thread_rv, start_thread_id);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00279)
+ "apr_thread_join: unable to join the start "
+ "thread");
+ }
+}
+
+static void child_main(int child_num_arg, int child_bucket)
+{
+ apr_thread_t **threads;
+ apr_status_t rv;
+ thread_starter *ts;
+ apr_threadattr_t *thread_attr;
+ apr_thread_t *start_thread_id;
+ int i;
+
+ /* for benefit of any hooks that run as this child initializes */
+ retained->mpm->mpm_state = AP_MPMQ_STARTING;
+
+ ap_my_pid = getpid();
+ ap_fatal_signal_child_setup(ap_server_conf);
+
+ /* Get a sub context for global allocations in this child, so that
+ * we can have cleanups occur when the child exits.
+ */
+ apr_pool_create(&pchild, pconf);
+ apr_pool_tag(pchild, "pchild");
+
+#if AP_HAS_THREAD_LOCAL
+ if (!one_process) {
+ apr_thread_t *thd = NULL;
+ if ((rv = ap_thread_main_create(&thd, pchild))) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(10375)
+ "Couldn't initialize child main thread");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ }
+#endif
+
+ /* close unused listeners and pods */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ if (i != child_bucket) {
+ ap_close_listeners_ex(all_buckets[i].listeners);
+ ap_mpm_podx_close(all_buckets[i].pod);
+ }
+ }
+
+ /*stuff to do before we switch id's, so we have permissions.*/
+ ap_reopen_scoreboard(pchild, NULL, 0);
+
+ rv = SAFE_ACCEPT(apr_proc_mutex_child_init(&my_bucket->mutex,
+ apr_proc_mutex_lockfile(my_bucket->mutex),
+ pchild));
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(00280)
+ "Couldn't initialize cross-process lock in child");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* done with init critical section */
+ if (ap_run_drop_privileges(pchild, ap_server_conf)) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* Just use the standard apr_setup_signal_thread to block all signals
+ * from being received. The child processes no longer use signals for
+ * any communication with the parent process. Let's also do this before
+ * child_init() hooks are called and possibly create threads that
+ * otherwise could "steal" (implicitly) MPM's signals.
+ */
+ rv = apr_setup_signal_thread();
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(00281)
+ "Couldn't initialize signal thread");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ ap_run_child_init(pchild, ap_server_conf);
+
+ if (ap_max_requests_per_child) {
+ requests_this_child = ap_max_requests_per_child;
+ }
+ else {
+ /* coding a value of zero means infinity */
+ requests_this_child = INT_MAX;
+ }
+
+ /* Setup threads */
+
+ /* Globals used by signal_threads() so to be initialized before */
+ setup_threads_runtime();
+
+ /* clear the storage; we may not create all our threads immediately,
+ * and we want a 0 entry to indicate a thread which was not created
+ */
+ threads = (apr_thread_t **)ap_calloc(1,
+ sizeof(apr_thread_t *) * threads_per_child);
+ ts = (thread_starter *)apr_palloc(pchild, sizeof(*ts));
+
+ apr_threadattr_create(&thread_attr, pchild);
+ /* 0 means PTHREAD_CREATE_JOINABLE */
+ apr_threadattr_detach_set(thread_attr, 0);
+
+ if (ap_thread_stacksize != 0) {
+ rv = apr_threadattr_stacksize_set(thread_attr, ap_thread_stacksize);
+ if (rv != APR_SUCCESS && rv != APR_ENOTIMPL) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, APLOGNO(02435)
+ "WARNING: ThreadStackSize of %" APR_SIZE_T_FMT " is "
+ "inappropriate, using default",
+ ap_thread_stacksize);
+ }
+ }
+
+ ts->threads = threads;
+ ts->listener = NULL;
+ ts->child_num_arg = child_num_arg;
+ ts->threadattr = thread_attr;
+
+ rv = ap_thread_create(&start_thread_id, thread_attr, start_threads,
+ ts, pchild);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(00282)
+ "ap_thread_create: unable to create worker thread");
+ /* let the parent decide how bad this really is */
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+
+ retained->mpm->mpm_state = AP_MPMQ_RUNNING;
+
+ /* If we are only running in one_process mode, we will want to
+ * still handle signals. */
+ if (one_process) {
+ /* Block until we get a terminating signal. */
+ apr_signal_thread(check_signal);
+ /* make sure the start thread has finished; signal_threads()
+ * and join_workers() depend on that
+ */
+ /* XXX join_start_thread() won't be awakened if one of our
+ * threads encounters a critical error and attempts to
+ * shutdown this child
+ */
+ join_start_thread(start_thread_id);
+ signal_threads(ST_UNGRACEFUL); /* helps us terminate a little more
+ * quickly than the dispatch of the signal thread
+ * beats the Pipe of Death and the browsers
+ */
+ /* A terminating signal was received. Now join each of the
+ * workers to clean them up.
+ * If the worker already exited, then the join frees
+ * their resources and returns.
+ * If the worker hasn't exited, then this blocks until
+ * they have (then cleans up).
+ */
+ join_workers(ts->listener, threads, ST_UNGRACEFUL);
+ }
+ else { /* !one_process */
+ /* remove SIGTERM from the set of blocked signals... if one of
+ * the other threads in the process needs to take us down
+ * (e.g., for MaxConnectionsPerChild) it will send us SIGTERM
+ */
+ apr_signal(SIGTERM, dummy_signal_handler);
+ unblock_signal(SIGTERM);
+ /* Watch for any messages from the parent over the POD */
+ while (1) {
+ rv = ap_mpm_podx_check(my_bucket->pod);
+ if (rv == AP_MPM_PODX_NORESTART) {
+ /* see if termination was triggered while we slept */
+ switch(terminate_mode) {
+ case ST_GRACEFUL:
+ rv = AP_MPM_PODX_GRACEFUL;
+ break;
+ case ST_UNGRACEFUL:
+ rv = AP_MPM_PODX_RESTART;
+ break;
+ }
+ }
+ if (rv == AP_MPM_PODX_GRACEFUL || rv == AP_MPM_PODX_RESTART) {
+ /* make sure the start thread has finished;
+ * signal_threads() and join_workers depend on that
+ */
+ join_start_thread(start_thread_id);
+ signal_threads(rv == AP_MPM_PODX_GRACEFUL ? ST_GRACEFUL : ST_UNGRACEFUL);
+ break;
+ }
+ }
+
+ /* A terminating signal was received. Now join each of the
+ * workers to clean them up.
+ * If the worker already exited, then the join frees
+ * their resources and returns.
+ * If the worker hasn't exited, then this blocks until
+ * they have (then cleans up).
+ */
+ join_workers(ts->listener, threads,
+ rv == AP_MPM_PODX_GRACEFUL ? ST_GRACEFUL : ST_UNGRACEFUL);
+ }
+
+ free(threads);
+
+ clean_child_exit(resource_shortage ? APEXIT_CHILDSICK : 0);
+}
+
+static int make_child(server_rec *s, int slot, int bucket)
+{
+ int pid;
+
+ if (slot + 1 > retained->max_daemons_limit) {
+ retained->max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ my_bucket = &all_buckets[0];
+
+ worker_note_child_started(slot, getpid());
+ child_main(slot, 0);
+ /* NOTREACHED */
+ ap_assert(0);
+ return -1;
+ }
+
+ if ((pid = fork()) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, APLOGNO(00283)
+ "fork: Unable to fork new process");
+ /* fork didn't succeed. There's no need to touch the scoreboard;
+ * if we were trying to replace a failed child process, then
+ * server_main_loop() marked its workers SERVER_DEAD, and if
+ * we were trying to replace a child process that exited normally,
+ * its worker_thread()s left SERVER_DEAD or SERVER_GRACEFUL behind.
+ */
+
+ /* In case system resources are maxxed out, we don't want
+ Apache running away with the CPU trying to fork over and
+ over and over again. */
+ apr_sleep(apr_time_from_sec(10));
+
+ return -1;
+ }
+
+ if (!pid) {
+#if AP_HAS_THREAD_LOCAL
+ ap_thread_current_after_fork();
+#endif
+
+ my_bucket = &all_buckets[bucket];
+
+#ifdef HAVE_BINDPROCESSOR
+ /* By default, AIX binds to a single processor. This bit unbinds
+ * children which will then bind to another CPU.
+ */
+ int status = bindprocessor(BINDPROCESS, (int)getpid(),
+ PROCESSOR_CLASS_ANY);
+ if (status != OK)
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, errno,
+ ap_server_conf, APLOGNO(00284)
+ "processor unbind failed");
+#endif
+ RAISE_SIGSTOP(MAKE_CHILD);
+
+ apr_signal(SIGTERM, just_die);
+ child_main(slot, bucket);
+ /* NOTREACHED */
+ ap_assert(0);
+ return -1;
+ }
+
+ if (ap_scoreboard_image->parent[slot].pid != 0) {
+ /* This new child process is squatting on the scoreboard
+ * entry owned by an exiting child process, which cannot
+ * exit until all active requests complete.
+ */
+ worker_note_child_lost_slot(slot, pid);
+ }
+ ap_scoreboard_image->parent[slot].quiescing = 0;
+ worker_note_child_started(slot, pid);
+ return 0;
+}
+
+/* start up a bunch of children */
+static void startup_children(int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
+ if (ap_scoreboard_image->parent[i].pid != 0) {
+ continue;
+ }
+ if (make_child(ap_server_conf, i, i % retained->mpm->num_buckets) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+static void perform_idle_server_maintenance(int child_bucket)
+{
+ int num_buckets = retained->mpm->num_buckets;
+ int idle_thread_count;
+ process_score *ps;
+ int free_length;
+ int totally_free_length = 0;
+ int free_slots[MAX_SPAWN_RATE];
+ int last_non_dead;
+ int total_non_dead;
+ int active_thread_count = 0;
+ int i, j;
+
+ /* initialize the free_list */
+ free_length = 0;
+
+ idle_thread_count = 0;
+ last_non_dead = -1;
+ total_non_dead = 0;
+
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ /* Initialization to satisfy the compiler. It doesn't know
+ * that threads_per_child is always > 0 */
+ int any_dying_threads = 0;
+ int any_dead_threads = 0;
+ int all_dead_threads = 1;
+ int child_threads_active = 0;
+
+ if (num_buckets > 1 && (i % num_buckets) != child_bucket) {
+ /* We only care about child_bucket in this call */
+ continue;
+ }
+ if (i >= retained->max_daemons_limit &&
+ totally_free_length == retained->idle_spawn_rate[child_bucket]) {
+ /* short cut if all active processes have been examined and
+ * enough empty scoreboard slots have been found
+ */
+ break;
+ }
+ ps = &ap_scoreboard_image->parent[i];
+ for (j = 0; j < threads_per_child; j++) {
+ int status = ap_scoreboard_image->servers[i][j].status;
+
+ /* XXX any_dying_threads is probably no longer needed GLA */
+ any_dying_threads = any_dying_threads ||
+ (status == SERVER_GRACEFUL);
+ any_dead_threads = any_dead_threads || (status == SERVER_DEAD);
+ all_dead_threads = all_dead_threads &&
+ (status == SERVER_DEAD ||
+ status == SERVER_GRACEFUL);
+
+ /* We consider a starting server as idle because we started it
+ * at least a cycle ago, and if it still hasn't finished starting
+ * then we're just going to swamp things worse by forking more.
+ * So we hopefully won't need to fork more if we count it.
+ * This depends on the ordering of SERVER_READY and SERVER_STARTING.
+ */
+ if (ps->pid != 0) { /* XXX just set all_dead_threads in outer for
+ loop if no pid? not much else matters */
+ if (status <= SERVER_READY &&
+ !ps->quiescing &&
+ ps->generation == retained->mpm->my_generation) {
+ ++idle_thread_count;
+ }
+ if (status >= SERVER_READY && status < SERVER_GRACEFUL) {
+ ++child_threads_active;
+ }
+ }
+ }
+ active_thread_count += child_threads_active;
+ if (any_dead_threads
+ && totally_free_length < retained->idle_spawn_rate[child_bucket]
+ && free_length < MAX_SPAWN_RATE / num_buckets
+ && (!ps->pid /* no process in the slot */
+ || ps->quiescing)) { /* or at least one is going away */
+ if (all_dead_threads) {
+ /* great! we prefer these, because the new process can
+ * start more threads sooner. So prioritize this slot
+ * by putting it ahead of any slots with active threads.
+ *
+ * first, make room by moving a slot that's potentially still
+ * in use to the end of the array
+ */
+ free_slots[free_length] = free_slots[totally_free_length];
+ free_slots[totally_free_length++] = i;
+ }
+ else {
+ /* slot is still in use - back of the bus
+ */
+ free_slots[free_length] = i;
+ }
+ ++free_length;
+ }
+ else if (child_threads_active == threads_per_child) {
+ had_healthy_child = 1;
+ }
+ /* XXX if (!ps->quiescing) is probably more reliable GLA */
+ if (!any_dying_threads) {
+ ++total_non_dead;
+ }
+ if (ps->pid != 0) {
+ last_non_dead = i;
+ }
+ }
+
+ retained->max_daemons_limit = last_non_dead + 1;
+
+ if (retained->sick_child_detected) {
+ if (had_healthy_child) {
+ /* Assume this is a transient error, even though it may not be. Leave
+ * the server up in case it is able to serve some requests or the
+ * problem will be resolved.
+ */
+ retained->sick_child_detected = 0;
+ }
+ else if (child_bucket < num_buckets - 1) {
+ /* check for had_healthy_child up to the last child bucket */
+ return;
+ }
+ else {
+ /* looks like a basket case, as no child ever fully initialized; give up.
+ */
+ retained->mpm->shutdown_pending = 1;
+ child_fatal = 1;
+ ap_log_error(APLOG_MARK, APLOG_ALERT, 0,
+ ap_server_conf, APLOGNO(02325)
+ "A resource shortage or other unrecoverable failure "
+ "was encountered before any child process initialized "
+ "successfully... httpd is exiting!");
+ /* the child already logged the failure details */
+ return;
+ }
+ }
+
+ if (idle_thread_count > max_spare_threads / num_buckets) {
+ /* Kill off one child */
+ ap_mpm_podx_signal(all_buckets[child_bucket].pod,
+ AP_MPM_PODX_GRACEFUL);
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+ else if (idle_thread_count < min_spare_threads / num_buckets) {
+ /* terminate the free list */
+ if (free_length == 0) { /* scoreboard is full, can't fork */
+
+ if (active_thread_count >= max_workers / num_buckets) {
+ /* no threads are "inactive" - starting, stopping, etc. */
+ /* have we reached MaxRequestWorkers, or just getting close? */
+ if (0 == idle_thread_count) {
+ if (!retained->maxclients_reported) {
+ /* only report this condition once */
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00286)
+ "server reached MaxRequestWorkers "
+ "setting, consider raising the "
+ "MaxRequestWorkers setting");
+ retained->maxclients_reported = 1;
+ }
+ } else {
+ if (!retained->near_maxclients_reported) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00287)
+ "server is within MinSpareThreads of "
+ "MaxRequestWorkers, consider raising the "
+ "MaxRequestWorkers setting");
+ retained->near_maxclients_reported = 1;
+ }
+ }
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0,
+ ap_server_conf, APLOGNO(00288)
+ "scoreboard is full, not at MaxRequestWorkers");
+ }
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+ else {
+ if (free_length > retained->idle_spawn_rate[child_bucket]) {
+ free_length = retained->idle_spawn_rate[child_bucket];
+ }
+ if (retained->idle_spawn_rate[child_bucket] >= 8) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0,
+ ap_server_conf, APLOGNO(00289)
+ "server seems busy, (you may need "
+ "to increase StartServers, ThreadsPerChild "
+ "or Min/MaxSpareThreads), "
+ "spawning %d children, there are around %d idle "
+ "threads, and %d total children", free_length,
+ idle_thread_count, total_non_dead);
+ }
+ for (i = 0; i < free_length; ++i) {
+ make_child(ap_server_conf, free_slots[i], child_bucket);
+ }
+ /* the next time around we want to spawn twice as many if this
+ * wasn't good enough, but not if we've just done a graceful
+ */
+ if (retained->hold_off_on_exponential_spawning) {
+ --retained->hold_off_on_exponential_spawning;
+ }
+ else if (retained->idle_spawn_rate[child_bucket]
+ < MAX_SPAWN_RATE / num_buckets) {
+ retained->idle_spawn_rate[child_bucket] *= 2;
+ }
+ }
+ }
+ else {
+ retained->idle_spawn_rate[child_bucket] = 1;
+ }
+}
+
+static void server_main_loop(int remaining_children_to_start)
+{
+ int num_buckets = retained->mpm->num_buckets;
+ int successive_kills = 0;
+ ap_generation_t old_gen;
+ int child_slot;
+ apr_exit_why_e exitwhy;
+ int status, processed_status;
+ apr_proc_t pid;
+ int i;
+
+ while (!retained->mpm->restart_pending && !retained->mpm->shutdown_pending) {
+ ap_wait_or_timeout(&exitwhy, &status, &pid, pconf, ap_server_conf);
+
+ if (pid.pid != -1) {
+ processed_status = ap_process_child_status(&pid, exitwhy, status);
+ child_slot = ap_find_child_by_pid(&pid);
+ if (processed_status == APEXIT_CHILDFATAL) {
+ /* fix race condition found in PR 39311
+ * A child created at the same time as a graceful happens
+ * can find the lock missing and create a fatal error.
+ * It is not fatal for the last generation to be in this state.
+ */
+ if (child_slot < 0
+ || ap_get_scoreboard_process(child_slot)->generation
+ == retained->mpm->my_generation) {
+ retained->mpm->shutdown_pending = 1;
+ child_fatal = 1;
+ return;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(00290)
+ "Ignoring fatal error in child of previous "
+ "generation (pid %ld).",
+ (long)pid.pid);
+ retained->sick_child_detected = 1;
+ }
+ }
+ else if (processed_status == APEXIT_CHILDSICK) {
+ /* tell perform_idle_server_maintenance to check into this
+ * on the next timer pop
+ */
+ retained->sick_child_detected = 1;
+ }
+ /* non-fatal death... note that it's gone in the scoreboard. */
+ if (child_slot >= 0) {
+ process_score *ps;
+
+ for (i = 0; i < threads_per_child; i++)
+ ap_update_child_status_from_indexes(child_slot, i,
+ SERVER_DEAD, NULL);
+
+ worker_note_child_killed(child_slot, 0, 0);
+ ps = &ap_scoreboard_image->parent[child_slot];
+ ps->quiescing = 0;
+ if (processed_status == APEXIT_CHILDSICK) {
+ /* resource shortage, minimize the fork rate */
+ retained->idle_spawn_rate[child_slot % num_buckets] = 1;
+ }
+ else if (remaining_children_to_start
+ && child_slot < ap_daemons_limit) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ make_child(ap_server_conf, child_slot,
+ child_slot % num_buckets);
+ --remaining_children_to_start;
+ }
+ }
+ else if (ap_unregister_extra_mpm_process(pid.pid, &old_gen) == 1) {
+ worker_note_child_killed(-1, /* already out of the scoreboard */
+ pid.pid, old_gen);
+ if (processed_status == APEXIT_CHILDSICK
+ && old_gen == retained->mpm->my_generation) {
+ /* resource shortage, minimize the fork rate */
+ for (i = 0; i < num_buckets; i++) {
+ retained->idle_spawn_rate[i] = 1;
+ }
+ }
+#if APR_HAS_OTHER_CHILD
+ }
+ else if (apr_proc_other_child_alert(&pid, APR_OC_REASON_DEATH,
+ status) == 0) {
+ /* handled */
+#endif
+ }
+ else if (retained->mpm->was_graceful) {
+ /* Great, we've probably just lost a slot in the
+ * scoreboard. Somehow we don't know about this child.
+ */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
+ ap_server_conf, APLOGNO(00291)
+ "long lost child came home! (pid %ld)",
+ (long)pid.pid);
+ }
+ /* Don't perform idle maintenance when a child dies,
+ * only do it when there's a timeout. Remember only a
+ * finite number of children can die, and it's pretty
+ * pathological for a lot to die suddenly. If a child is
+ * killed by a signal (faulting) we want to restart it ASAP
+ * though, up to 3 successive faults or we stop this until
+ * a timeout happens again (to avoid the flood of fork()ed
+ * processes that keep being killed early).
+ */
+ if (child_slot < 0 || !APR_PROC_CHECK_SIGNALED(exitwhy)) {
+ continue;
+ }
+ if (++successive_kills >= 3) {
+ if (successive_kills % 10 == 3) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
+ ap_server_conf, APLOGNO(10393)
+ "children are killed successively!");
+ }
+ continue;
+ }
+ ++remaining_children_to_start;
+ }
+ else {
+ successive_kills = 0;
+ }
+
+ if (remaining_children_to_start) {
+ /* we hit a 1 second timeout in which none of the previous
+ * generation of children needed to be reaped... so assume
+ * they're all done, and pick up the slack if any is left.
+ */
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ /* In any event we really shouldn't do the code below because
+ * few of the servers we just started are in the IDLE state
+ * yet, so we'd mistakenly create an extra server.
+ */
+ continue;
+ }
+
+ for (i = 0; i < num_buckets; i++) {
+ perform_idle_server_maintenance(i);
+ }
+ }
+}
+
+static int worker_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
+{
+ int num_buckets = retained->mpm->num_buckets;
+ int remaining_children_to_start;
+ int i;
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ if (!retained->mpm->was_graceful) {
+ if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+ return !OK;
+ }
+ /* fix the generation number in the global score; we just got a new,
+ * cleared scoreboard
+ */
+ ap_scoreboard_image->global->running_generation = retained->mpm->my_generation;
+ }
+
+ ap_unixd_mpm_set_signals(pconf, one_process);
+
+ /* Don't thrash since num_buckets depends on the
+ * system and the number of online CPU cores...
+ */
+ if (ap_daemons_limit < num_buckets)
+ ap_daemons_limit = num_buckets;
+ if (ap_daemons_to_start < num_buckets)
+ ap_daemons_to_start = num_buckets;
+ /* We want to create as much children at a time as the number of buckets,
+ * so to optimally accept connections (evenly distributed across buckets).
+ * Thus min_spare_threads should at least maintain num_buckets children,
+ * and max_spare_threads allow num_buckets more children w/o triggering
+ * immediately (e.g. num_buckets idle threads margin, one per bucket).
+ */
+ if (min_spare_threads < threads_per_child * (num_buckets - 1) + num_buckets)
+ min_spare_threads = threads_per_child * (num_buckets - 1) + num_buckets;
+ if (max_spare_threads < min_spare_threads + (threads_per_child + 1) * num_buckets)
+ max_spare_threads = min_spare_threads + (threads_per_child + 1) * num_buckets;
+
+ /* If we're doing a graceful_restart then we're going to see a lot
+ * of children exiting immediately when we get into the main loop
+ * below (because we just sent them AP_SIG_GRACEFUL). This happens pretty
+ * rapidly... and for each one that exits we may start a new one, until
+ * there are at least min_spare_threads idle threads, counting across
+ * all children. But we may be permitted to start more children than
+ * that, so we'll just keep track of how many we're
+ * supposed to start up without the 1 second penalty between each fork.
+ */
+ remaining_children_to_start = ap_daemons_to_start;
+ if (remaining_children_to_start > ap_daemons_limit) {
+ remaining_children_to_start = ap_daemons_limit;
+ }
+ if (!retained->mpm->was_graceful) {
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ }
+ else {
+ /* give the system some time to recover before kicking into
+ * exponential mode */
+ retained->hold_off_on_exponential_spawning = 10;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00292)
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00293)
+ "Server built: %s", ap_get_server_built());
+ ap_log_command_line(plog, s);
+ ap_log_mpm_common(s);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00294)
+ "Accept mutex: %s (default: %s)",
+ (all_buckets[0].mutex)
+ ? apr_proc_mutex_name(all_buckets[0].mutex)
+ : "none",
+ apr_proc_mutex_defname());
+ retained->mpm->mpm_state = AP_MPMQ_RUNNING;
+
+ server_main_loop(remaining_children_to_start);
+ retained->mpm->mpm_state = AP_MPMQ_STOPPING;
+
+ if (retained->mpm->shutdown_pending && retained->mpm->is_ungraceful) {
+ /* Time to shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
+ AP_MPM_PODX_RESTART);
+ }
+ ap_reclaim_child_processes(1, /* Start with SIGTERM */
+ worker_note_child_killed);
+
+ if (!child_fatal) {
+ /* cleanup pid file on normal shutdown */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0,
+ ap_server_conf, APLOGNO(00295) "caught SIGTERM, shutting down");
+ }
+ return DONE;
+ }
+
+ if (retained->mpm->shutdown_pending) {
+ /* Time to gracefully shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ int active_children;
+ int index;
+ apr_time_t cutoff = 0;
+
+ /* Close our listeners, and then ask our children to do same */
+ ap_close_listeners();
+
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
+ AP_MPM_PODX_GRACEFUL);
+ }
+ ap_relieve_child_processes(worker_note_child_killed);
+
+ if (!child_fatal) {
+ /* cleanup pid file on normal shutdown */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00296)
+ "caught " AP_SIG_GRACEFUL_STOP_STRING
+ ", shutting down gracefully");
+ }
+
+ if (ap_graceful_shutdown_timeout) {
+ cutoff = apr_time_now() +
+ apr_time_from_sec(ap_graceful_shutdown_timeout);
+ }
+
+ /* Don't really exit until each child has finished */
+ retained->mpm->shutdown_pending = 0;
+ do {
+ /* Pause for a second */
+ apr_sleep(apr_time_from_sec(1));
+
+ /* Relieve any children which have now exited */
+ ap_relieve_child_processes(worker_note_child_killed);
+
+ active_children = 0;
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_mpm_safe_kill(MPM_CHILD_PID(index), 0) == APR_SUCCESS) {
+ active_children = 1;
+ /* Having just one child is enough to stay around */
+ break;
+ }
+ }
+ } while (!retained->mpm->shutdown_pending && active_children &&
+ (!ap_graceful_shutdown_timeout || apr_time_now() < cutoff));
+
+ /* We might be here because we received SIGTERM, either
+ * way, try and make sure that all of our processes are
+ * really dead.
+ */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
+ AP_MPM_PODX_RESTART);
+ }
+ ap_reclaim_child_processes(1, worker_note_child_killed);
+
+ return DONE;
+ }
+
+ /* we've been told to restart */
+ if (one_process) {
+ /* not worth thinking about */
+ return DONE;
+ }
+
+ /* advance to the next generation */
+ /* XXX: we really need to make sure this new generation number isn't in
+ * use by any of the children.
+ */
+ ++retained->mpm->my_generation;
+ ap_scoreboard_image->global->running_generation = retained->mpm->my_generation;
+
+ if (!retained->mpm->is_ungraceful) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00297)
+ AP_SIG_GRACEFUL_STRING " received. Doing graceful restart");
+ /* wake up the children...time to die. But we'll have more soon */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
+ AP_MPM_PODX_GRACEFUL);
+ }
+
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request.
+ */
+
+ }
+ else {
+ /* Kill 'em all. Since the child acts the same on the parents SIGTERM
+ * and a SIGHUP, we may as well use the same signal, because some user
+ * pthreads are stealing signals from us left and right.
+ */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
+ AP_MPM_PODX_RESTART);
+ }
+
+ ap_reclaim_child_processes(1, /* Start with SIGTERM */
+ worker_note_child_killed);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00298)
+ "SIGHUP received. Attempting to restart");
+ }
+
+ return OK;
+}
+
+/* This really should be a post_config hook, but the error log is already
+ * redirected by that point, so we need to do this in the open_logs phase.
+ */
+static int worker_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+ int level_flags = 0;
+ int num_buckets = 0;
+ ap_listen_rec **listen_buckets;
+ apr_status_t rv;
+ char id[16];
+ int i;
+
+ pconf = p;
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (retained->mpm->module_loads == 1) {
+ startup = 1;
+ level_flags |= APLOG_STARTUP;
+ }
+
+ if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT | level_flags, 0,
+ (startup ? NULL : s),
+ "no listening sockets available, shutting down");
+ return !OK;
+ }
+
+ if (one_process) {
+ num_buckets = 1;
+ }
+ else if (retained->mpm->was_graceful) {
+ /* Preserve the number of buckets on graceful restarts. */
+ num_buckets = retained->mpm->num_buckets;
+ }
+ if ((rv = ap_duplicate_listeners(pconf, ap_server_conf,
+ &listen_buckets, &num_buckets))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not duplicate listeners");
+ return !OK;
+ }
+
+ all_buckets = apr_pcalloc(pconf, num_buckets * sizeof(*all_buckets));
+ for (i = 0; i < num_buckets; i++) {
+ if (!one_process && /* no POD in one_process mode */
+ (rv = ap_mpm_podx_open(pconf, &all_buckets[i].pod))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not open pipe-of-death");
+ return !OK;
+ }
+ /* Initialize cross-process accept lock (safe accept needed only) */
+ if ((rv = SAFE_ACCEPT((apr_snprintf(id, sizeof id, "%i", i),
+ ap_proc_mutex_create(&all_buckets[i].mutex,
+ NULL, AP_ACCEPT_MUTEX_TYPE,
+ id, s, pconf, 0))))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not create accept mutex");
+ return !OK;
+ }
+ all_buckets[i].listeners = listen_buckets[i];
+ }
+
+ if (retained->mpm->max_buckets < num_buckets) {
+ int new_max, *new_ptr;
+ new_max = retained->mpm->max_buckets * 2;
+ if (new_max < num_buckets) {
+ new_max = num_buckets;
+ }
+ new_ptr = (int *)apr_palloc(ap_pglobal, new_max * sizeof(int));
+ if (retained->idle_spawn_rate) /* NULL at startup */
+ memcpy(new_ptr, retained->idle_spawn_rate,
+ retained->mpm->num_buckets * sizeof(int));
+ retained->idle_spawn_rate = new_ptr;
+ retained->mpm->max_buckets = new_max;
+ }
+ if (retained->mpm->num_buckets < num_buckets) {
+ int rate_max = 1;
+ /* If new buckets are added, set their idle spawn rate to
+ * the highest so far, so that they get filled as quickly
+ * as the existing ones.
+ */
+ for (i = 0; i < retained->mpm->num_buckets; i++) {
+ if (rate_max < retained->idle_spawn_rate[i]) {
+ rate_max = retained->idle_spawn_rate[i];
+ }
+ }
+ for (/* up to date i */; i < num_buckets; i++) {
+ retained->idle_spawn_rate[i] = rate_max;
+ }
+ }
+ retained->mpm->num_buckets = num_buckets;
+
+ return OK;
+}
+
+static int worker_pre_config(apr_pool_t *pconf, apr_pool_t *plog,
+ apr_pool_t *ptemp)
+{
+ int no_detach, debug, foreground;
+ apr_status_t rv;
+ const char *userdata_key = "mpm_worker_module";
+
+ debug = ap_exists_config_define("DEBUG");
+
+ if (debug) {
+ foreground = one_process = 1;
+ no_detach = 0;
+ }
+ else {
+ one_process = ap_exists_config_define("ONE_PROCESS");
+ no_detach = ap_exists_config_define("NO_DETACH");
+ foreground = ap_exists_config_define("FOREGROUND");
+ }
+
+ ap_mutex_register(pconf, AP_ACCEPT_MUTEX_TYPE, NULL, APR_LOCK_DEFAULT, 0);
+
+ retained = ap_retained_data_get(userdata_key);
+ if (!retained) {
+ retained = ap_retained_data_create(userdata_key, sizeof(*retained));
+ retained->mpm = ap_unixd_mpm_get_retained_data();
+ }
+ retained->mpm->mpm_state = AP_MPMQ_STARTING;
+ if (retained->mpm->baton != retained) {
+ retained->mpm->was_graceful = 0;
+ retained->mpm->baton = retained;
+ }
+ ++retained->mpm->module_loads;
+
+ /* sigh, want this only the second time around */
+ if (retained->mpm->module_loads == 2) {
+ if (!one_process && !foreground) {
+ /* before we detach, setup crash handlers to log to errorlog */
+ ap_fatal_signal_setup(ap_server_conf, pconf);
+ rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
+ : APR_PROC_DETACH_DAEMONIZE);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00299)
+ "apr_proc_detach failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+ }
+
+ parent_pid = ap_my_pid = getpid();
+
+ ap_listen_pre_config();
+ ap_daemons_to_start = DEFAULT_START_DAEMON;
+ min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
+ max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
+ server_limit = DEFAULT_SERVER_LIMIT;
+ thread_limit = DEFAULT_THREAD_LIMIT;
+ ap_daemons_limit = server_limit;
+ threads_per_child = DEFAULT_THREADS_PER_CHILD;
+ max_workers = ap_daemons_limit * threads_per_child;
+ had_healthy_child = 0;
+ ap_extended_status = 0;
+
+ return OK;
+}
+
+static int worker_check_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (retained->mpm->module_loads == 1) {
+ startup = 1;
+ }
+
+ if (server_limit > MAX_SERVER_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00300)
+ "WARNING: ServerLimit of %d exceeds compile-time "
+ "limit of %d servers, decreasing to %d.",
+ server_limit, MAX_SERVER_LIMIT, MAX_SERVER_LIMIT);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00301)
+ "ServerLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ server_limit, MAX_SERVER_LIMIT);
+ }
+ server_limit = MAX_SERVER_LIMIT;
+ }
+ else if (server_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00302)
+ "WARNING: ServerLimit of %d not allowed, "
+ "increasing to 1.", server_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00303)
+ "ServerLimit of %d not allowed, increasing to 1",
+ server_limit);
+ }
+ server_limit = 1;
+ }
+
+ /* you cannot change ServerLimit across a restart; ignore
+ * any such attempts
+ */
+ if (!retained->first_server_limit) {
+ retained->first_server_limit = server_limit;
+ }
+ else if (server_limit != retained->first_server_limit) {
+ /* don't need a startup console version here */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00304)
+ "changing ServerLimit to %d from original value of %d "
+ "not allowed during restart",
+ server_limit, retained->first_server_limit);
+ server_limit = retained->first_server_limit;
+ }
+
+ if (thread_limit > MAX_THREAD_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00305)
+ "WARNING: ThreadLimit of %d exceeds compile-time "
+ "limit of %d threads, decreasing to %d.",
+ thread_limit, MAX_THREAD_LIMIT, MAX_THREAD_LIMIT);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00306)
+ "ThreadLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ thread_limit, MAX_THREAD_LIMIT);
+ }
+ thread_limit = MAX_THREAD_LIMIT;
+ }
+ else if (thread_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00307)
+ "WARNING: ThreadLimit of %d not allowed, "
+ "increasing to 1.", thread_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00308)
+ "ThreadLimit of %d not allowed, increasing to 1",
+ thread_limit);
+ }
+ thread_limit = 1;
+ }
+
+ /* you cannot change ThreadLimit across a restart; ignore
+ * any such attempts
+ */
+ if (!retained->first_thread_limit) {
+ retained->first_thread_limit = thread_limit;
+ }
+ else if (thread_limit != retained->first_thread_limit) {
+ /* don't need a startup console version here */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00309)
+ "changing ThreadLimit to %d from original value of %d "
+ "not allowed during restart",
+ thread_limit, retained->first_thread_limit);
+ thread_limit = retained->first_thread_limit;
+ }
+
+ if (threads_per_child > thread_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00310)
+ "WARNING: ThreadsPerChild of %d exceeds ThreadLimit "
+ "of %d threads, decreasing to %d. "
+ "To increase, please see the ThreadLimit directive.",
+ threads_per_child, thread_limit, thread_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00311)
+ "ThreadsPerChild of %d exceeds ThreadLimit "
+ "of %d, decreasing to match",
+ threads_per_child, thread_limit);
+ }
+ threads_per_child = thread_limit;
+ }
+ else if (threads_per_child < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00312)
+ "WARNING: ThreadsPerChild of %d not allowed, "
+ "increasing to 1.", threads_per_child);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00313)
+ "ThreadsPerChild of %d not allowed, increasing to 1",
+ threads_per_child);
+ }
+ threads_per_child = 1;
+ }
+
+ if (max_workers < threads_per_child) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00314)
+ "WARNING: MaxRequestWorkers of %d is less than "
+ "ThreadsPerChild of %d, increasing to %d. "
+ "MaxRequestWorkers must be at least as large "
+ "as the number of threads in a single server.",
+ max_workers, threads_per_child, threads_per_child);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00315)
+ "MaxRequestWorkers of %d is less than ThreadsPerChild "
+ "of %d, increasing to match",
+ max_workers, threads_per_child);
+ }
+ max_workers = threads_per_child;
+ }
+
+ ap_daemons_limit = max_workers / threads_per_child;
+
+ if (max_workers % threads_per_child) {
+ int tmp_max_workers = ap_daemons_limit * threads_per_child;
+
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00316)
+ "WARNING: MaxRequestWorkers of %d is not an integer "
+ "multiple of ThreadsPerChild of %d, decreasing to nearest "
+ "multiple %d, for a maximum of %d servers.",
+ max_workers, threads_per_child, tmp_max_workers,
+ ap_daemons_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00317)
+ "MaxRequestWorkers of %d is not an integer multiple of "
+ "ThreadsPerChild of %d, decreasing to nearest "
+ "multiple %d", max_workers, threads_per_child,
+ tmp_max_workers);
+ }
+ max_workers = tmp_max_workers;
+ }
+
+ if (ap_daemons_limit > server_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00318)
+ "WARNING: MaxRequestWorkers of %d would require %d "
+ "servers and would exceed ServerLimit of %d, decreasing to %d. "
+ "To increase, please see the ServerLimit directive.",
+ max_workers, ap_daemons_limit, server_limit,
+ server_limit * threads_per_child);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00319)
+ "MaxRequestWorkers of %d would require %d servers and "
+ "exceed ServerLimit of %d, decreasing to %d",
+ max_workers, ap_daemons_limit, server_limit,
+ server_limit * threads_per_child);
+ }
+ ap_daemons_limit = server_limit;
+ }
+
+ /* ap_daemons_to_start > ap_daemons_limit checked in worker_run() */
+ if (ap_daemons_to_start < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00320)
+ "WARNING: StartServers of %d not allowed, "
+ "increasing to 1.", ap_daemons_to_start);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00321)
+ "StartServers of %d not allowed, increasing to 1",
+ ap_daemons_to_start);
+ }
+ ap_daemons_to_start = 1;
+ }
+
+ if (min_spare_threads < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00322)
+ "WARNING: MinSpareThreads of %d not allowed, "
+ "increasing to 1 to avoid almost certain server failure. "
+ "Please read the documentation.", min_spare_threads);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00323)
+ "MinSpareThreads of %d not allowed, increasing to 1",
+ min_spare_threads);
+ }
+ min_spare_threads = 1;
+ }
+
+ /* max_spare_threads < min_spare_threads + threads_per_child
+ * checked in worker_run()
+ */
+
+ return OK;
+}
+
+static void worker_hooks(apr_pool_t *p)
+{
+ /* Our open_logs hook function must run before the core's, or stderr
+ * will be redirected to a file, and the messages won't print to the
+ * console.
+ */
+ static const char *const aszSucc[] = {"core.c", NULL};
+ one_process = 0;
+
+ ap_hook_open_logs(worker_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
+ /* we need to set the MPM state before other pre-config hooks use MPM query
+ * to retrieve it, so register as REALLY_FIRST
+ */
+ ap_hook_pre_config(worker_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+ ap_hook_check_config(worker_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm(worker_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(worker_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(worker_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_daemons_to_start = atoi(arg);
+ return NULL;
+}
+
+static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ min_spare_threads = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ max_spare_threads = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_workers (cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+ if (!strcasecmp(cmd->cmd->name, "MaxClients")) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO(00324)
+ "MaxClients is deprecated, use MaxRequestWorkers "
+ "instead.");
+ }
+ max_workers = atoi(arg);
+ return NULL;
+}
+
+static const char *set_threads_per_child (cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ threads_per_child = atoi(arg);
+ return NULL;
+}
+
+static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ server_limit = atoi(arg);
+ return NULL;
+}
+
+static const char *set_thread_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ thread_limit = atoi(arg);
+ return NULL;
+}
+
+static const command_rec worker_cmds[] = {
+LISTEN_COMMANDS,
+AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
+ "Number of child processes launched at server startup"),
+AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
+ "Minimum number of idle threads, to handle request spikes"),
+AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
+ "Maximum number of idle threads"),
+AP_INIT_TAKE1("MaxRequestWorkers", set_max_workers, NULL, RSRC_CONF,
+ "Maximum number of threads alive at the same time"),
+AP_INIT_TAKE1("MaxClients", set_max_workers, NULL, RSRC_CONF,
+ "Deprecated name of MaxRequestWorkers"),
+AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
+ "Number of threads each child creates"),
+AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
+ "Maximum number of child processes for this run of Apache"),
+AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF,
+ "Maximum number of worker threads per child process for this run of Apache - Upper limit for ThreadsPerChild"),
+AP_GRACEFUL_SHUTDOWN_TIMEOUT_COMMAND,
+{ NULL }
+};
+
+AP_DECLARE_MODULE(mpm_worker) = {
+ MPM20_MODULE_STUFF,
+ NULL, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ worker_cmds, /* command apr_table_t */
+ worker_hooks /* register_hooks */
+};
+