manoj 99/06/22 15:26:13
Modified: mpm/src Configuration.mpm
mpm/src/main alloc.c
mpm/src/modules/mpm Makefile.tmpl
Added: mpm/src/modules/mpm acceptlock.c acceptlock.h http_accept.c
mpm_mpmt_pthread.c scoreboard.c
Log:
Add the mpmt_pthread MPM. This is a port of the hybrid server in the
apache-apr repository to the MPM module system.
Revision Changes Path
1.9 +2 -0 apache-2.0/mpm/src/Configuration.mpm
Index: Configuration.mpm
===================================================================
RCS file: /home/cvs/apache-2.0/mpm/src/Configuration.mpm,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -d -u -r1.8 -r1.9
--- Configuration.mpm 1999/06/20 23:49:27 1.8
+++ Configuration.mpm 1999/06/22 22:26:10 1.9
@@ -1,3 +1,5 @@
+# Add the appropriate flags to compile threaded code when using the
+# mpmt_pthread MPM (-pthread in EXTRA_CFLAGS on Linux)
EXTRA_CFLAGS= -Wall
EXTRA_LDFLAGS=
EXTRA_LIBS=
1.4 +4 -0 apache-2.0/mpm/src/main/alloc.c
Index: alloc.c
===================================================================
RCS file: /home/cvs/apache-2.0/mpm/src/main/alloc.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -d -u -r1.3 -r1.4
--- alloc.c 1999/06/20 21:46:12 1.3
+++ alloc.c 1999/06/22 22:26:10 1.4
@@ -565,6 +565,10 @@
known_stack_point = &s;
stack_var_init(&s);
#endif
+ alloc_mutex = ap_thread_mutex_new();
+#ifdef WIN32
+ spawn_mutex = ap_thread_mutex_new();
+#endif
permanent_pool = ap_make_root_pool();
#ifdef ALLOC_STATS
atexit(dump_stats);
1.2 +15 -0 apache-2.0/mpm/src/modules/mpm/Makefile.tmpl
Index: Makefile.tmpl
===================================================================
RCS file: /home/cvs/apache-2.0/mpm/src/modules/mpm/Makefile.tmpl,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -u -r1.1 -r1.2
--- Makefile.tmpl 1999/06/20 23:49:37 1.1
+++ Makefile.tmpl 1999/06/22 22:26:11 1.2
@@ -13,3 +13,18 @@
$(INCDIR)/http_core.h $(INCDIR)/http_connection.h \
$(INCDIR)/scoreboard_prefork.h $(INCDIR)/ap_mpm.h \
$(OSDIR)/unixd.h
+
+mpm_mpmt_pthread.o: mpm_mpmt_pthread.c $(INCDIR)/httpd.h
$(INCDIR)/ap_config.h \
+ $(INCDIR)/ap_mmn.h $(INCDIR)/ap_config_auto.h \
+ $(OSDIR)/os.h $(INCDIR)/ap_ctype.h \
+ $(INCDIR)/hsregex.h $(INCDIR)/alloc.h \
+ $(INCDIR)/buff.h $(INCDIR)/ap_iol.h $(INCDIR)/ap.h \
+ $(INCDIR)/apr.h $(INCDIR)/util_uri.h \
+ $(INCDIR)/http_main.h $(INCDIR)/http_log.h \
+ $(INCDIR)/http_config.h $(INCDIR)/http_core.h \
+ $(INCDIR)/http_connection.h $(INCDIR)/ap_mpm.h \
+ $(OSDIR)/unixd.h $(INCDIR)/http_accept.h acceptlock.c \
+ $(INCDIR)/http_protocol.h $(INCDIR)/http_request.h \
+ $(INCDIR)/http_conf_globals.h $(INCDIR)/http_vhost.h \
+ $(INCDIR)/util_script.h acceptlock.h \
+ http_accept.c scoreboard.c
1.1 apache-2.0/mpm/src/modules/mpm/acceptlock.c
Index: acceptlock.c
===================================================================
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#include "httpd.h"
#include "http_main.h"
#include "http_log.h"
#include "http_config.h" /* for read_config */
#include "http_protocol.h" /* for read_request */
#include "http_request.h" /* for process_request */
#include "http_conf_globals.h"
#include "http_core.h" /* for get_remote_host */
#include "http_vhost.h"
#include "util_script.h" /* to force util_script.c linking */
#include "util_uri.h"
#include "acceptlock.h"
#include "http_accept.h"
#include <netinet/tcp.h>
#include <stdio.h>
#ifdef USE_SHMGET_SCOREBOARD
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#endif
#include "pthread.h"
/* Number of cross-process locks we're managing */
static int lock_count;
/* Number of intra-process locks we're managing */
static int intra_lock_count;
/* Intraprocess locking used by other serialization techniques */
static pthread_mutex_t *intra_mutex = NULL;
static void intra_mutex_cleanup(void *foo)
{
int i;
for (i = 0; i < intra_lock_count; i++) {
(void) pthread_mutex_destroy(&intra_mutex[i]);
}
}
void intra_mutex_init(pool *p, int number_of_locks)
{
int i;
intra_lock_count = number_of_locks;
intra_mutex = (pthread_mutex_t *)ap_palloc(p, intra_lock_count *
sizeof(pthread_mutex_t ));
for (i = 0; i < intra_lock_count; i++) {
if (pthread_mutex_init(&intra_mutex[i], NULL) != 0) {
perror("intra_mutex_init");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
ap_register_cleanup(p, NULL, intra_mutex_cleanup, ap_null_cleanup);
}
void intra_mutex_on(int locknum)
{
if ((errno = pthread_mutex_lock(&intra_mutex[locknum])) != 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG,
(const server_rec *) ap_get_server_conf(),
"Error getting intraprocess lock. Exiting!");
}
}
void intra_mutex_off(int locknum)
{
if (pthread_mutex_unlock(&intra_mutex[locknum]) != 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG,
(const server_rec *) ap_get_server_conf(),
"Error releasing intraprocess lock. Exiting!");
}
}
#if defined(USE_FCNTL_SERIALIZED_ACCEPT) ||
defined(USE_FLOCK_SERIALIZED_ACCEPT)
static void init_lock_fname(pool *p)
{
/* XXXX possibly bogus cast */
ap_lock_fname = ap_psprintf(p, "%s.%lu",
ap_server_root_relative(p, ap_lock_fname), (unsigned long)getpid());
}
static char * expand_lock_fname(pool *p, int i)
{
return ap_psprintf(p, "%s.%d", ap_lock_fname, i);
}
#endif
#if defined (USE_USLOCK_SERIALIZED_ACCEPT)
/* XXX - Don't know if we need the intraprocess locks here */
#include <ulocks.h>
static ulock_t *uslock = NULL;
void accept_mutex_init(pool *p, int number_of_locks)
{
ptrdiff_t old;
usptr_t *us;
int i;
lock_count = number_of_locks;
uslock = (ulock_t *)ap_palloc(p, lock_count * sizeof(ulock_t));
for (i = 0; i < lock_count; i++) {
/* default is 8, allocate enough for all the children plus the parent */
if ((old = usconfig(CONF_INITUSERS, HARD_SERVER_LIMIT + 1)) == -1) {
perror("usconfig(CONF_INITUSERS)");
exit(-1);
}
if ((old = usconfig(CONF_LOCKTYPE, US_NODEBUG)) == -1) {
perror("usconfig(CONF_LOCKTYPE)");
exit(-1);
}
if ((old = usconfig(CONF_ARENATYPE, US_SHAREDONLY)) == -1) {
perror("usconfig(CONF_ARENATYPE)");
exit(-1);
}
if ((us = usinit("/dev/zero")) == NULL) {
perror("usinit");
exit(-1);
}
if ((uslock[i] = usnewlock(us)) == NULL) {
perror("usnewlock");
exit(-1);
}
}
}
void accept_mutex_on(int locknum)
{
switch (ussetlock(uslock[locknum])) {
case 1:
/* got lock */
break;
case 0:
fprintf(stderr, "didn't get lock\n");
clean_child_exit(APEXIT_CHILDFATAL);
case -1:
perror("ussetlock");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
void accept_mutex_off(int locknum)
{
if (usunsetlock(uslock[locknum]) == -1) {
perror("usunsetlock");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
#elif defined (USE_PTHREAD_SERIALIZED_ACCEPT)
/* This code probably only works on Solaris ... but it works really fast
* on Solaris. Note that pthread mutexes are *NOT* released when a task
* dies ... the task has to free it itself. So we block signals and
* try to be nice about releasing the mutex.
*/
#include <pthread.h>
static pthread_mutex_t *accept_mutex = (void *)(caddr_t) -1;
static int *have_accept_mutex;
/* The sections surrounded with this ifdef are not needed because of the
* sigwait thread. They may be turned back on, though, depending on how the
* port to nonthreaded mode goes */
#ifdef NEED_TO_BLOCK_SIGNALS_AROUND_PTHREAD_CALLS
static sigset_t accept_block_mask;
static sigset_t *accept_previous_masks = NULL;
#endif
void accept_mutex_child_cleanup(void *foo)
{
int i;
if (accept_mutex != (void *)(caddr_t)-1) {
for (i = 0; i < lock_count; i++) {
if (have_accept_mutex[i]) {
pthread_mutex_unlock(&accept_mutex[i]);
}
}
}
}
void accept_mutex_child_init(pool *p)
{
ap_register_cleanup(p, NULL, accept_mutex_child_cleanup, ap_null_cleanup);
#ifdef NEED_TO_BLOCK_SIGNALS_AROUND_PTHREAD_CALLS
accept_previous_masks = ap_palloc(p, lock_count * sizeof(sigset_t));
#endif
}
void accept_mutex_cleanup(void *foo)
{
int i;
if (accept_mutex != (void *)(caddr_t)-1
&& munmap((caddr_t) accept_mutex,
sizeof(pthread_mutex_t) * lock_count)) {
perror("munmap");
}
accept_mutex = (void *)(caddr_t)-1;
}
void accept_mutex_init(pool *p, int number_of_locks)
{
pthread_mutexattr_t mattr;
int fd;
int i;
lock_count = number_of_locks;
have_accept_mutex = (int *)ap_palloc(p,
lock_count * sizeof(int));
fd = open("/dev/zero", O_RDWR);
if (fd == -1) {
perror("open(/dev/zero)");
exit(APEXIT_INIT);
}
accept_mutex = (pthread_mutex_t *) mmap((caddr_t) 0,
sizeof(pthread_mutex_t) * lock_count,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (accept_mutex == (void *) (caddr_t) - 1) {
perror("mmap");
exit(APEXIT_INIT);
}
close(fd);
if ((errno = pthread_mutexattr_init(&mattr))) {
perror("pthread_mutexattr_init");
exit(APEXIT_INIT);
}
if ((errno = pthread_mutexattr_setpshared(&mattr,
PTHREAD_PROCESS_SHARED))) {
perror("pthread_mutexattr_setpshared");
exit(APEXIT_INIT);
}
for (i = 0; i < lock_count; i++) {
if ((errno = pthread_mutex_init(&accept_mutex[i], &mattr))) {
perror("pthread_mutex_init");
exit(APEXIT_INIT);
}
}
if ((errno = pthread_mutexattr_destroy(&mattr))) {
perror("pthread_mutexattr_destroy");
exit(APEXIT_INIT);
}
#ifdef NEED_TO_BLOCK_SIGNALS_AROUND_PTHREAD_CALLS
sigfillset(&accept_block_mask);
sigdelset(&accept_block_mask, SIGHUP);
sigdelset(&accept_block_mask, SIGTERM);
sigdelset(&accept_block_mask, SIGWINCH);
#endif
ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
}
void accept_mutex_on(int locknum)
{
int err;
#ifdef NEED_TO_BLOCK_SIGNALS_AROUND_PTHREAD_CALLS
if (pthread_sigmask(SIG_BLOCK, &accept_block_mask,
&accept_previous_mask[locknum])) {
perror("pthread_sigmask(SIG_BLOCK)");
clean_child_exit(APEXIT_CHILDFATAL);
}
#endif
if ((err = pthread_mutex_lock(&accept_mutex[locknum]))) {
errno = err;
perror("pthread_mutex_lock");
clean_child_exit(APEXIT_CHILDFATAL);
}
have_accept_mutex[locknum] = 1;
}
void accept_mutex_off(int locknum)
{
int err;
if ((err = pthread_mutex_unlock(&accept_mutex[locknum]))) {
errno = err;
perror("pthread_mutex_unlock");
clean_child_exit(APEXIT_CHILDFATAL);
}
/* There is a slight race condition right here... if we were to die right
* now, we'd do another pthread_mutex_unlock. Now, doing that would let
* another process into the mutex. pthread mutexes are designed to be
* fast, as such they don't have protection for things like testing if the
* thread owning a mutex is actually unlocking it (or even any way of
* testing who owns the mutex).
*
* If we were to unset have_accept_mutex prior to releasing the mutex
* then the race could result in the server unable to serve hits. Doing
* it this way means that the server can continue, but an additional
* child might be in the critical section ... at least it's still serving
* hits.
*/
have_accept_mutex[locknum] = 0;
#ifdef NEED_TO_BLOCK_SIGNALS_AROUND_PTHREAD_CALLS
if (pthread_sigmask(SIG_SETMASK, &accept_previous_mask[locknum], NULL)) {
perror("pthread_sigmask(SIG_SETMASK)");
clean_child_exit(1);
}
#endif
}
#elif defined (USE_SYSVSEM_SERIALIZED_ACCEPT)
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#ifdef NEED_UNION_SEMUN
/* it makes no sense, but this isn't defined on solaris */
union semun {
long val;
struct semid_ds *buf;
ushort *array;
};
#endif
static int *sem_id = NULL;
static struct sembuf op_on;
static struct sembuf op_off;
/* We get a random semaphore ... the lame sysv semaphore interface
* means we have to be sure to clean this up or else we'll leak
* semaphores.
*/
void accept_mutex_cleanup(void *foo)
{
union semun ick;
int i;
for (i = 0; i < lock_count; i++) {
if (sem_id[i] < 0)
return;
/* this is ignored anyhow */
ick.val = 0;
semctl(sem_id[i], 0, IPC_RMID, ick);
}
}
void accept_mutex_init(pool *p, int number_of_locks)
{
union semun ick;
struct semid_ds buf;
int i;
lock_count = number_of_locks;
sem_id = (int *)ap_palloc(p, lock_count * sizeof(int));
for (i = 0; i < lock_count; i++) {
/* acquire the semaphore */
sem_id[i] = semget(IPC_PRIVATE, 1, IPC_CREAT | 0600);
if (sem_id[i] < 0) {
perror("semget");
exit(APEXIT_INIT);
}
ick.val = 1;
if (semctl(sem_id[i], 0, SETVAL, ick) < 0) {
perror("semctl(SETVAL)");
exit(APEXIT_INIT);
}
if (!getuid()) {
/* restrict it to use only by the appropriate user_id ... not that
this
* stops CGIs from acquiring it and dinking around with it.
*/
buf.sem_perm.uid = unixd_config.user_id;
buf.sem_perm.gid = unixd_config.group_id;
buf.sem_perm.mode = 0600;
ick.buf = &buf;
if (semctl(sem_id[i], 0, IPC_SET, ick) < 0) {
perror("semctl(IPC_SET)");
exit(APEXIT_INIT);
}
}
ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
/* pre-initialize these */
op_on.sem_num = 0;
op_on.sem_op = -1;
op_on.sem_flg = SEM_UNDO;
op_off.sem_num = 0;
op_off.sem_op = 1;
op_off.sem_flg = SEM_UNDO;
}
}
void accept_mutex_on(int locknum)
{
if (semop(sem_id[locknum], &op_on, 1) < 0) {
perror("accept_mutex_on");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
void accept_mutex_off(int locknum)
{
if (semop(sem_id[locknum], &op_off, 1) < 0) {
perror("accept_mutex_off");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
#elif defined(USE_FCNTL_SERIALIZED_ACCEPT)
static struct flock lock_it;
static struct flock unlock_it;
static int *lock_fd = NULL;
/*
* Initialize mutex lock.
* Must be safe to call this on a restart.
*/
void accept_mutex_init(pool *p, int number_of_locks)
{
int i;
char * lock_fname;
lock_count = number_of_locks;
lock_fd = (int *)ap_palloc(p, lock_count * sizeof(int *));
lock_it.l_whence = SEEK_SET; /* from current point */
lock_it.l_start = 0; /* -"- */
lock_it.l_len = 0; /* until end of file */
lock_it.l_type = F_WRLCK; /* set exclusive/write lock */
lock_it.l_pid = 0; /* pid not actually interesting
*/
unlock_it.l_whence = SEEK_SET; /* from current point */
unlock_it.l_start = 0; /* -"- */
unlock_it.l_len = 0; /* until end of file */
unlock_it.l_type = F_UNLCK; /* set exclusive/write lock */
unlock_it.l_pid = 0; /* pid not actually interesting */
init_lock_fname(p);
for (i = 0; i < lock_count; i++) {
lock_fname = expand_lock_fname(p, i);
lock_fd[i] = ap_popenf(p, lock_fname,
O_CREAT | O_WRONLY | O_EXCL, 0644);
if (lock_fd[i] == -1) {
perror("open");
fprintf(stderr, "Cannot open lock file: %s\n", lock_fname);
exit(APEXIT_INIT);
}
unlink(lock_fname);
}
}
void accept_mutex_on(int locknum)
{
int ret;
while ((ret = fcntl(lock_fd[locknum], F_SETLKW, &lock_it)) < 0 &&
errno == EINTR) {
/* nop */
}
if (ret < 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG, (const server_rec*)
ap_get_server_conf(),
"fcntl: F_SETLKW: Error getting accept lock, exiting! "
"Perhaps you need to use the LockFile directive to place "
"your lock file on a local disk!");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
void accept_mutex_off(int locknum)
{
int ret;
while ((ret = fcntl(lock_fd[locknum], F_SETLKW, &unlock_it)) < 0
&& errno == EINTR) {
/* nop */
}
if (ret < 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG, (const server_rec*)
ap_get_server_conf(),
"fcntl: F_SETLKW: Error freeing accept lock, exiting! "
"Perhaps you need to use the LockFile directive to place "
"your lock file on a local disk!");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
#elif defined(USE_FLOCK_SERIALIZED_ACCEPT)
static int *lock_fd = NULL;
void accept_mutex_cleanup(void *foo)
{
int i;
char * lock_fname;
for (i = 0; i < lock_count; i++) {
lock_fname = expand_lock_fname(foo, i);
unlink(lock_fname);
}
}
/*
* Initialize mutex lock.
* Done by each child at it's birth
*/
void accept_mutex_child_init(pool *p)
{
int i;
for (i = 0; i < lock_count; i++) {
char *lock_fname = expand_lock_fname(p, i);
lock_fd[i] = ap_popenf(p, lock_fname, O_WRONLY, 0600);
if (lock_fd[i] == -1) {
ap_log_error(APLOG_MARK, APLOG_EMERG,
(const server_rec *)ap_get_server_conf(),
"Child cannot open lock file: %s", lock_fname);
clean_child_exit(APEXIT_CHILDINIT);
}
}
}
/*
* Initialize mutex lock.
* Must be safe to call this on a restart.
*/
void accept_mutex_init(pool *p, int number_of_locks)
{
int i;
char *lock_fname;
lock_count = number_of_locks;
lock_fd = (int *)ap_palloc(p, lock_count * sizeof(int *));
init_lock_fname(p);
for (i = 0; i < lock_count; i++) {
lock_fname = expand_lock_fname(p, i);
unlink(lock_fname);
lock_fd[i] = ap_popenf(p, lock_fname,
O_CREAT | O_WRONLY | O_EXCL, 0600);
if (lock_fd[i] == -1) {
ap_log_error(APLOG_MARK, APLOG_EMERG,
(const server_rec *) ap_get_server_conf(),
"Parent cannot open lock file: %s", lock_fname);
exit(APEXIT_INIT);
}
ap_register_cleanup(p, p, accept_mutex_cleanup, ap_null_cleanup);
}
}
void accept_mutex_on(int locknum)
{
int ret;
while ((ret = flock(lock_fd[locknum], LOCK_EX)) < 0 && errno == EINTR)
continue;
if (ret < 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG,
(const server_rec *) ap_get_server_conf(),
"flock: LOCK_EX: Error getting accept lock. Exiting!");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
void accept_mutex_off(int locknum)
{
if (flock(lock_fd[locknum], LOCK_UN) < 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG,
(const server_rec *) ap_get_server_conf(),
"flock: LOCK_UN: Error freeing accept lock. Exiting!");
clean_child_exit(APEXIT_CHILDFATAL);
}
}
#elif defined(USE_OS2SEM_SERIALIZED_ACCEPT)
static HMTX *lock_sem = NULL;
void accept_mutex_cleanup(void *foo)
{
int i;
for (i = 0; i < lock_count; i++) {
DosReleaseMutexSem(lock_sem[i]);
DosCloseMutexSem(lock_sem[i]);
}
}
/*
* Initialize mutex lock.
* Done by each child at it's birth
*/
void accept_mutex_child_init(pool *p)
{
int i;
for(i = 0; i < lock_count; i++) {
int rc = DosOpenMutexSem(NULL, &lock_sem[locknum]);
if (rc != 0) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG,
ap_get_server_conf(),
"Child cannot open lock semaphore, rc=%d", rc);
clean_child_exit(APEXIT_CHILDINIT);
}
}
}
/*
* Initialize mutex lock.
* Must be safe to call this on a restart.
*/
void accept_mutex_init(pool *p, int number_of_locks)
{
int rc;
int i;
lock_count = number_of_locks;
lock_fd = (int *)ap_palloc(p, lock_count * sizeof(int *));
for (i = 0; i < lock_count; i++) {
rc = DosCreateMutexSem(NULL, &lock_sem[i], DC_SEM_SHARED, FALSE);
if (rc != 0) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG,
ap_get_server_conf(),
"Parent cannot create lock semaphore, rc=%d", rc);
exit(APEXIT_INIT);
}
ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
}
}
void accept_mutex_on(int locknum)
{
int rc = DosRequestMutexSem(lock_sem[locknum], SEM_INDEFINITE_WAIT);
if (rc != 0) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG,
ap_get_server_conf(),
"OS2SEM: Error %d getting accept lock. Exiting!", rc);
clean_child_exit(APEXIT_CHILDFATAL);
}
}
void accept_mutex_off(int locknum)
{
int rc = DosReleaseMutexSem(lock_sem[locknum]);
if (rc != 0) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG,
ap_get_server_conf(),
"OS2SEM: Error %d freeing accept lock. Exiting!", rc);
clean_child_exit(APEXIT_CHILDFATAL);
}
}
#elif defined(USE_TPF_CORE_SERIALIZED_ACCEPT)
static int tpf_core_held;
static void accept_mutex_cleanup(void *foo)
{
if(tpf_core_held)
coruc(RESOURCE_KEY);
}
#define accept_mutex_init(x)
static void accept_mutex_child_init(pool *p)
{
ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
tpf_core_held = 0;
}
static void accept_mutex_on(void)
{
corhc(RESOURCE_KEY);
tpf_core_held = 1;
ap_check_signals();
}
static void accept_mutex_off(void)
{
coruc(RESOURCE_KEY);
tpf_core_held = 0;
ap_check_signals();
}
#else
/* Default --- no serialization. Other methods *could* go here,
* as #elifs...
*/
#if !defined(MULTITHREAD)
/* Multithreaded systems don't complete between processes for
* the sockets. */
#endif
#endif
1.1 apache-2.0/mpm/src/modules/mpm/acceptlock.h
Index: acceptlock.h
===================================================================
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#ifndef APACHE_ACCEPT_LOCK_H
#define APACHE_ACCEPT_LOCK_H
#ifdef __cplusplus
extern "C" {
#endif
/* Prototypes for the intraprocess accept mutex functions */
void intra_mutex_init(pool *p, int);
void intra_mutex_on(int);
void intra_mutex_off(int);
/* Prototyps for the accept mutex functions. */
#if defined (USE_USLOCK_SERIALIZED_ACCEPT)
#define accept_mutex_child_init(x)
void accept_mutex_init(pool *, int);
void accept_mutex_on(int);
void accept_mutex_off(int);
#elif defined (USE_PTHREAD_SERIALIZED_ACCEPT)
void accept_mutex_child_cleanup(void *);
void accept_mutex_child_init(pool *);
void accept_mutex_cleanup(void *);
void accept_mutex_init(pool *, int);
void accept_mutex_on(int);
void accept_mutex_off(int);
#elif defined (USE_SYSVSEM_SERIALIZED_ACCEPT)
void accept_mutex_cleanup(void *);
#define accept_mutex_child_init(x)
void accept_mutex_init(pool *, int);
void accept_mutex_on(int);
void accept_mutex_off(int);
#elif defined(USE_FCNTL_SERIALIZED_ACCEPT)
#define accept_mutex_child_init(x)
void accept_mutex_init(pool *, int);
void accept_mutex_on(int);
void accept_mutex_off(int);
#elif defined(USE_FLOCK_SERIALIZED_ACCEPT)
void accept_mutex_cleanup(void *);
void accept_mutex_child_init(pool *);
void accept_mutex_init(pool *, int);
void accept_mutex_on(int);
void accept_mutex_off(int);
#elif defined(USE_OS2SEM_SERIALIZED_ACCEPT)
void accept_mutex_cleanup(void *);
void accept_mutex_child_init(pool *);
void accept_mutex_init(pool *, int);
void accept_mutex_on(int);
void accept_mutex_off(int);
#else
#if !defined(MULTITHREAD)
/* Multithreaded systems don't complete between processes for
* the sockets. */
#define NO_SERIALIZED_ACCEPT
#define accept_mutex_child_init(x)
#define accept_mutex_init(x, y)
#define accept_mutex_on(x)
#define accept_mutex_off(x)
#endif
#endif
#ifdef __cplusplus
}
#endif
#endif /* APACHE_ACCEPT_LOCK_H */
1.1 apache-2.0/mpm/src/modules/mpm/http_accept.c
Index: http_accept.c
===================================================================
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#include "httpd.h"
#include "http_log.h"
#include "http_main.h"
#include "http_conf_globals.h"
#include "acceptlock.h"
#include "scoreboard.h"
#include "http_accept.h"
#include <poll.h>
#include <netinet/tcp.h>
/* Indicates that all acceptor threads are dead after SIGWINCH and the worker
* threads can now exit */
static int workers_may_exit = 0;
static int requests_this_child;
static int num_listenfds;
#if defined (USE_ACCEPT_QUEUE)
#include "fdqueue.h"
#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
/* Each thread only listens to one socket in this model, so the starvation
* problem described in manual/misc/perf-tuning.html can't occur here */
#define SAFE_ACCEPT(stmt)
#else
#define SAFE_ACCEPT(stmt) do {stmt;} while(0)
#endif
/* The queue of sockets we've accepted */
static FDQueue csd_queue;
static void * accept_thread(void * dummy)
{
proc_info * ti = dummy;
int my_pid = ti->pid;
int my_tid = ti->tid;
int sd = ti->sd;
int csd = 0;
int srv, ret;
struct sockaddr sa_client;
size_t len = sizeof(struct sockaddr);
struct pollfd listenfds[2];
char pipe_read_char;
free(ti);
/*
* Let's setup the socket options on the master socket. These
* will be inherited by any dup'ed sockets for us. No reason to do
* this oce for each request.
sock_disable_nagle(sd);
*/
listenfds[0].fd = ap_pipe_of_death[0];
listenfds[0].events = POLLIN;
listenfds[0].revents = 0;
listenfds[1].fd = sd;
listenfds[1].events = POLLIN;
listenfds[1].revents = 0;
while ((ap_max_requests_per_child != 0 && requests_this_child > 0) ||
(ap_max_requests_per_child == 0)) {
if (workers_may_exit)
break;
(void) ap_update_child_status(my_pid, my_tid, SERVER_ACCEPTING,
(request_rec *) NULL);
/* lock around the accept if necessary */
SAFE_ACCEPT(intra_mutex_on(my_tid - ap_threads_per_child));
if (workers_may_exit) {
SAFE_ACCEPT(intra_mutex_off(my_tid - ap_threads_per_child));
break;
}
SAFE_ACCEPT(accept_mutex_on(my_tid - ap_threads_per_child));
if (queue_full(&csd_queue)) {
SAFE_ACCEPT(accept_mutex_off(my_tid - ap_threads_per_child));
SAFE_ACCEPT(intra_mutex_off(my_tid - ap_threads_per_child));
block_on_queue(&csd_queue);
csd = -1;
}
else {
for (;;) {
srv = poll(listenfds, 2, -1);
if (listenfds[0].revents & POLLIN) {
/* A process has gotten a signal on the shutdown pipe.
* Check if we're the lucky process to die. */
ret = read(listenfds[0].fd, &pipe_read_char, 1);
if (ret == -1 && errno == EAGAIN) {
/* It lost the lottery. It must continue to suffer
* through a life of servitude */
continue;
}
else {
/* It won the lottery (or something else is very
* wrong). Embrace death with open arms. */
workers_may_exit = 1;
pthread_cond_broadcast(&(csd_queue.not_empty));
csd = -1;
break;
}
} else {
csd = ap_accept(sd, &sa_client, &len);
requests_this_child--;
break;
}
}
SAFE_ACCEPT(accept_mutex_off(my_tid - ap_threads_per_child));
SAFE_ACCEPT(intra_mutex_off(my_tid - ap_threads_per_child));
}
(void) ap_update_child_status(my_pid, my_tid, SERVER_QUEUEING,
(request_rec *) NULL);
if (csd >= 0) {
if (queue_push(&csd_queue, csd, &sa_client) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, ap_get_server_conf(),
"queue_push: couldn't put new connection on"
"queue");
}
}
}
ap_update_child_status(my_pid, my_tid, SERVER_DEAD, (request_rec *) NULL);
return NULL;
}
void accept_parent_init(pool *pconf, int listener_count)
{
SAFE_ACCEPT(accept_mutex_init(pconf, listener_count));
ap_acceptors_per_child = num_listenfds = listener_count;
}
/*
* Description:
* Do any setup or initialization required before worker threads begin
* accepting connections
* Design questions:
* 1. what sort of arguments need to be passed on this call?
* 2. should the queue logic be simplified?
* 3. Pass in server_conf?
* 4. Simply access the globals (yech...)
*/
void accept_child_init(pool* pchild,
int worker_threads_per_child)
{
int queue_capacity = worker_threads_per_child + ap_acceptors_per_child;
SAFE_ACCEPT(intra_mutex_init(pchild, ap_acceptors_per_child));
SAFE_ACCEPT(accept_mutex_child_init(pchild));
requests_this_child = ap_max_requests_per_child;
queue_init(&csd_queue, queue_capacity, pchild);
}
void start_accepting_connections(int my_child_num)
{
proc_info *my_info;
pthread_t thread;
/*
* Yech, ap_listeners is a global declared in http_conf_globals.h
* and defined in http_main.c
*/
listen_rec *lr = ap_listeners;
/* Warning: Subtle code ahead
* 1. This code assumes the thing pointed to by ap_listeners is a NULL
terminated
* linked list.
*
* 2. The scoreboard size is ap_threads_per_child + ap_acceptors_per_child
* The acceptor entries are at the end of the scoreboard, so index into
the
* scoreboard beginning with ap_threads_per_child
* Perhaps a better approach is to create a new scoreboard accessor
method to
* fetch the index of the next free entry? And put in some bounds checking
* to prevent running off the end of the scoreboard? (ie, if
next_free_entry()
* returns NULL and we find ourselves needing another entry, we have a
logic
* bug that needs to be fixed...
* Perhaps we should create a scoreboard object with methods, etc.?
* ap_threads_per_child is a GLOBAL...
*/
int i = ap_threads_per_child;
if (lr) {
while (lr != NULL) {
(void) ap_update_child_status(my_child_num, i, SERVER_STARTING,
(request_rec *) NULL);
my_info = NULL;
my_info = (proc_info *) malloc(sizeof(proc_info));
my_info->pid = my_child_num;
my_info->tid = i++;
my_info->sd = lr->fd;
if (pthread_create(&thread, NULL, accept_thread, my_info)) {
ap_log_error(APLOG_MARK, APLOG_ALERT, (const server_rec*)
ap_get_server_conf(),
"pthread_create: unable to create acceptor
thread");
/*
* We failed to create a thread. Update the scoreboard,
* or it will say SERVER_STARTING forever.
*/
exit(1);
} else {
/* We let each thread update it's own scoreboard entry. This is
done
* because it let's us deal with tid better.
*/
}
lr = lr->next;
}
} else {
/* no listening sockets???? Kill the server please. */
exit(0);
}
}
int get_connection(struct sockaddr *sa_client)
{
int csd = -1;
int block_if_empty = 1;
increase_blanks(&csd_queue);
while (csd == -1) {
if (workers_may_exit)
block_if_empty = 0;
csd = queue_pop(&csd_queue, sa_client, block_if_empty);
if (workers_may_exit)
break;
}
return csd;
}
#elif defined(USE_MULTI_ACCEPT)
#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
#define SAFE_ACCEPT(stmt) do {if(ap_listeners->next != NULL) {stmt;}} while(0)
#else
#define SAFE_ACCEPT(stmt) do {stmt;} while(0)
#endif
/*
* USE_MULTI_ACCEPT
* Worker threads do the accept and process the request.
*/
static listen_rec *head_listener;
static struct pollfd *listenfds;
void accept_parent_init(pool *pconf, int listener_count)
{
SAFE_ACCEPT(accept_mutex_init(pconf, 1));
num_listenfds = listener_count;
ap_acceptors_per_child = 0;
}
void accept_child_init(pool* pchild,
int worker_threads_per_child)
{
int i;
listen_rec *lr;
SAFE_ACCEPT(intra_mutex_init(pchild, 1));
SAFE_ACCEPT(accept_mutex_child_init(pchild));
requests_this_child = ap_max_requests_per_child;
head_listener = ap_listeners;
listenfds = ap_palloc(pchild, sizeof(struct pollfd) * (num_listenfds +
1));
listenfds[0].fd = ap_pipe_of_death[0];
listenfds[0].events = POLLIN;
listenfds[0].revents = 0;
for (lr = ap_listeners, i = 1; i <= num_listenfds; lr = lr->next, ++i) {
lr->index = i;
listenfds[i].fd = lr->fd;
listenfds[i].events = POLLIN; /* should we add POLLPRI ?*/
listenfds[i].revents = 0;
}
}
void start_accepting_connections(int my_child_num)
{
}
int get_connection(struct sockaddr *sa_client)
{
int csd = -1;
int sd;
int srv;
int ret;
listen_rec *lr;
char pipe_read_char;
size_t len = sizeof(struct sockaddr);
while ((ap_max_requests_per_child != 0 && requests_this_child > 0) ||
(ap_max_requests_per_child == 0)) {
SAFE_ACCEPT(intra_mutex_on(0));
if (workers_may_exit) {
SAFE_ACCEPT(intra_mutex_off(0));
return -1;
}
SAFE_ACCEPT(accept_mutex_on(0));
for (;;) {
if (workers_may_exit)
break;
srv = poll(listenfds, num_listenfds + 1, -1);
if (listenfds[0].revents & POLLIN) {
/* A process has gotten a signal on the shutdown pipe.
* Check if we're the lucky process to die. */
ret = read(listenfds[0].fd, &pipe_read_char, 1);
if (ret == -1 && errno == EAGAIN) {
/* It lost the lottery. It must continue to suffer through
* a life of servitude */
continue;
}
else {
/* It won the lottery (or something else is very wrong).
* Embrace death with open arms. */
break;
}
}
if (workers_may_exit)
break;
if (srv < 0) {
/* XXX - hmmmm, poll can return EINTR. - mvsk */
if (errno == EINTR) {
continue;
}
SAFE_ACCEPT(accept_mutex_off(0));
SAFE_ACCEPT(intra_mutex_off(0));
/* 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, (const server_rec*)
ap_get_server_conf(), "select: (listen)");
clean_child_exit(1);
}
if (srv == 0) {
/* Is srv == 0 a valid return? */
continue;
}
/* This conditional is used because the single listen case is the
* only one where the accept might not be serialized. In that
* case, multiple threads mucking around with the head_listener
* pointer will be harmful */
if (num_listenfds == 1) {
/* only one socket, just pretend we did the other stuff */
sd = ap_listeners->fd;
}
else {
/* find a listener */
/* Loop or NULL terminated list? That is the question. Be
* consistent across all the accept techniques */
lr = head_listener;
do {
/* XXX: should we check for PR_POLL_ERR ?? */
if (listenfds[lr->index].revents & POLLIN) {
/* advance to the next listener for next loop */
head_listener = lr->next;
/* hack to handle listenfds being NULL terminated
list
* rather than a loop
*/
if (head_listener == NULL) {
head_listener = ap_listeners;
}
goto got_lr;
}
lr = lr->next;
if (lr == NULL) {
lr = ap_listeners;
}
} while (lr != head_listener);
/* if we don't find anything then just start again */
fprintf(stderr,"poll returned but we got nothing!\n");
head_listener = ap_listeners;
continue;
got_lr:
sd = lr->fd;
}
csd = ap_accept(sd, sa_client, &len);
requests_this_child--;
if (csd >= 0)
break; /* We have a socket ready for reading */
/* XXX: we need to deal with error conditions here */
}
SAFE_ACCEPT(accept_mutex_off(0));
SAFE_ACCEPT(intra_mutex_off(0));
if (csd >= 0) {
return csd;
} else{
break;
}
}
workers_may_exit = 1;
return -1;
}
#endif
1.1 apache-2.0/mpm/src/modules/mpm/mpm_mpmt_pthread.c
Index: mpm_mpmt_pthread.c
===================================================================
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#define CORE_PRIVATE
#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 "unixd.h"
#include "scoreboard.h"
#include "http_accept.h"
#include <netinet/tcp.h>
#include "pthread.h"
/*
* Actual definitions of config globals
*/
static int ap_threads_per_child=0; /* Worker threads per child */
static int ap_acceptors_per_child=0; /* Accept threads per child */
static int ap_max_requests_per_child=0;
static char *ap_pid_fname=NULL;
static char *ap_scoreboard_fname=NULL;
static char *ap_lock_fname;
static struct in_addr ap_bind_address; /* ZZZZZ Abstract out the in_addr */
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;
static time_t ap_restart_time=0;
static int ap_listenbacklog;
API_VAR_EXPORT int ap_extended_status = 0;
/*
* The max child slot ever assigned, preserved across restarts. Necessary
* to deal with MaxClients changes across SIGWINCH restarts. We use this
* value to optimize routines that have to scan the entire scoreboard.
*/
static int max_daemons_limit = -1;
/*
* During config time, listeners is treated as a NULL-terminated list.
* ;child_main previously would start at the beginning of the list each time
* through the loop, so a socket early on in the list could easily starve out
* sockets later on in the list. The solution is to start at the listener
* after the last one processed. But to do that fast/easily in child_main
it's
* way more convenient for listeners to be a ring that loops back on itself.
* The routine setup_listeners() is called after config time to both open up
* the sockets and to turn the NULL-terminated list into a ring that loops
back
* on itself.
*
* head_listener is used by each child to keep track of what they consider
* to be the "start" of the ring. It is also set by make_child to ensure
* that new children also don't starve any sockets.
*
* Note that listeners != NULL is ensured by read_config().
*/
listen_rec *ap_listeners;
static char ap_coredump_dir[MAX_STRING_LEN];
int ap_pipe_of_death[2];
/* *Non*-shared http_main globals... */
static server_rec *server_conf;
/* 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;
#ifdef DEBUG_SIGSTOP
int raise_sigstop_flags;
#endif
#ifdef HAS_OTHER_CHILD
/* used to maintain list of children which aren't part of the scoreboard */
typedef struct other_child_rec other_child_rec;
struct other_child_rec {
other_child_rec *next;
int pid;
void (*maintenance) (int, void *, ap_wait_t);
void *data;
int write_fd;
};
static other_child_rec *other_children;
#endif
static pool *pconf; /* Pool for config stuff */
static pool *pchild; /* Pool for httpd child stuff */
static int my_pid; /* Linux getpid() doesn't work except in main thread. Use
this instead */
/* Keep track of the number of worker threads currently active */
static int worker_thread_count;
static pthread_mutex_t worker_thread_count_mutex;
/* Global, alas, so http_core can talk to us */
enum server_token_type ap_server_tokens = SrvTk_FULL;
API_EXPORT(const server_rec *) ap_get_server_conf(void)
{
return (server_conf);
}
API_EXPORT(int) ap_get_max_daemons(void)
{
return max_daemons_limit;
}
/* a clean exit from a child with proper cleanup
static void clean_child_exit(int code) __attribute__ ((noreturn)); */
void clean_child_exit(int code)
{
if (pchild) {
ap_destroy_pool(pchild);
}
exit(code);
}
/*****************************************************************
* dealing with other children
*/
#ifdef HAS_OTHER_CHILD
API_EXPORT(void) ap_register_other_child(int pid,
void (*maintenance) (int reason, void *, ap_wait_t
status),
void *data, int write_fd)
{
other_child_rec *ocr;
ocr = ap_palloc(pconf, sizeof(*ocr));
ocr->pid = pid;
ocr->maintenance = maintenance;
ocr->data = data;
ocr->write_fd = write_fd;
ocr->next = other_children;
other_children = ocr;
}
/* note that since this can be called by a maintenance function while we're
* scanning the other_children list, all scanners should protect themself
* by loading ocr->next before calling any maintenance function.
*/
API_EXPORT(void) ap_unregister_other_child(void *data)
{
other_child_rec **pocr, *nocr;
for (pocr = &other_children; *pocr; pocr = &(*pocr)->next) {
if ((*pocr)->data == data) {
nocr = (*pocr)->next;
(*(*pocr)->maintenance) (OC_REASON_UNREGISTER, (*pocr)->data, -1);
*pocr = nocr;
/* XXX: um, well we've just wasted some space in pconf ? */
return;
}
}
}
/* test to ensure that the write_fds are all still writable, otherwise
* invoke the maintenance functions as appropriate */
static void probe_writable_fds(void)
{
return;
#if 0
fd_set writable_fds;
int fd_max;
other_child_rec *ocr, *nocr;
struct timeval tv;
int rc;
if (other_children == NULL)
return;
fd_max = 0;
FD_ZERO(&writable_fds);
do {
for (ocr = other_children; ocr; ocr = ocr->next) {
if (ocr->write_fd == -1)
continue;
FD_SET(ocr->write_fd, &writable_fds);
if (ocr->write_fd > fd_max) {
fd_max = ocr->write_fd;
}
}
if (fd_max == 0)
return;
tv.tv_sec = 0;
tv.tv_usec = 0;
rc = ap_select(fd_max + 1, NULL, &writable_fds, NULL, &tv);
} while (rc == -1 && errno == EINTR);
if (rc == -1) {
/* XXX: uhh this could be really bad, we could have a bad file
* descriptor due to a bug in one of the maintenance routines */
ap_log_unixerr("probe_writable_fds", "select",
"could not probe writable fds", server_conf);
return;
}
if (rc == 0)
return;
for (ocr = other_children; ocr; ocr = nocr) {
nocr = ocr->next;
if (ocr->write_fd == -1)
continue;
if (FD_ISSET(ocr->write_fd, &writable_fds))
continue;
(*ocr->maintenance) (OC_REASON_UNWRITABLE, ocr->data, -1);
}
#endif
}
/* possibly reap an other_child, return 0 if yes, -1 if not */
static int reap_other_child(int pid, ap_wait_t status)
{
other_child_rec *ocr, *nocr;
for (ocr = other_children; ocr; ocr = nocr) {
nocr = ocr->next;
if (ocr->pid != pid)
continue;
ocr->pid = -1;
(*ocr->maintenance) (OC_REASON_DEATH, ocr->data, status);
return 0;
}
return -1;
}
#endif
static void reclaim_child_processes(int terminate)
{
int i, status;
long int waittime = 1024 * 16; /* in usecs */
struct timeval tv;
int waitret, tries;
int not_dead_yet;
#ifdef HAS_OTHER_CHILD
other_child_rec *ocr, *nocr;
#endif
ap_sync_scoreboard_image();
for (tries = terminate ? 4 : 1; tries <= 9; ++tries) {
/* don't want to hold up progress any more than
* necessary, but we need to allow children a few moments to exit.
* Set delay with an exponential backoff.
*/
tv.tv_sec = waittime / 1000000;
tv.tv_usec = waittime % 1000000;
waittime = waittime * 4;
ap_select(0, NULL, NULL, NULL, &tv);
/* now see who is done */
not_dead_yet = 0;
for (i = 0; i < max_daemons_limit; ++i) {
int pid = ap_scoreboard_image->parent[i].pid;
if (pid == my_pid || pid == 0)
continue;
waitret = waitpid(pid, &status, WNOHANG);
if (waitret == pid || waitret == -1) {
ap_scoreboard_image->parent[i].pid = 0;
continue;
}
++not_dead_yet;
switch (tries) {
case 1: /* 16ms */
case 2: /* 82ms */
break;
case 3: /* 344ms */
case 4: /* 16ms */
case 5: /* 82ms */
case 6: /* 344ms */
case 7: /* 1.4sec */
/* ok, now it's being annoying */
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING,
server_conf,
"child process %d still did not exit, sending a SIGTERM",
pid);
kill(pid, SIGTERM);
break;
case 8: /* 6 sec */
/* die child scum */
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, server_conf,
"child process %d still did not exit, sending a SIGKILL",
pid);
kill(pid, SIGKILL);
break;
case 9: /* 14 sec */
/* gave it our best shot, but alas... If this really
* is a child we are trying to kill and it really hasn't
* exited, we will likely fail to bind to the port
* after the restart.
*/
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, server_conf,
"could not make child process %d exit, "
"attempting to continue anyway", pid);
break;
}
}
#ifdef HAS_OTHER_CHILD
for (ocr = other_children; ocr; ocr = nocr) {
nocr = ocr->next;
if (ocr->pid == -1)
continue;
waitret = waitpid(ocr->pid, &status, WNOHANG);
if (waitret == ocr->pid) {
ocr->pid = -1;
(*ocr->maintenance) (OC_REASON_DEATH, ocr->data, status);
}
else if (waitret == 0) {
(*ocr->maintenance) (OC_REASON_RESTART, ocr->data, -1);
++not_dead_yet;
}
else if (waitret == -1) {
/* uh what the heck? they didn't call unregister? */
ocr->pid = -1;
(*ocr->maintenance) (OC_REASON_LOST, ocr->data, -1);
}
}
#endif
if (!not_dead_yet) {
/* nothing left to wait for */
break;
}
}
}
/* Finally, this routine is used by the caretaker process to wait for
* a while...
*/
/* number of calls to wait_or_timeout between writable probes */
#ifndef INTERVAL_OF_WRITABLE_PROBES
#define INTERVAL_OF_WRITABLE_PROBES 10
#endif
static int wait_or_timeout_counter;
static int wait_or_timeout(ap_wait_t *status)
{
struct timeval tv;
int ret;
++wait_or_timeout_counter;
if (wait_or_timeout_counter == INTERVAL_OF_WRITABLE_PROBES) {
wait_or_timeout_counter = 0;
#ifdef HAS_OTHER_CHILD
probe_writable_fds();
#endif
}
ret = waitpid(-1, status, WNOHANG);
if (ret == -1 && errno == EINTR) {
return -1;
}
if (ret > 0) {
return ret;
}
tv.tv_sec = SCOREBOARD_MAINTENANCE_INTERVAL / 1000000;
tv.tv_usec = SCOREBOARD_MAINTENANCE_INTERVAL % 1000000;
ap_select(0, NULL, NULL, NULL, &tv);
return -1;
}
#if defined(NSIG)
#define NumSIG NSIG
#elif defined(_NSIG)
#define NumSIG _NSIG
#elif defined(__NSIG)
#define NumSIG __NSIG
#else
#define NumSIG 32 /* for 1998's unixes, this is still a good assumption */
#endif
#ifdef SYS_SIGLIST /* platform has sys_siglist[] */
#define INIT_SIGLIST() /*nothing*/
#else /* platform has no sys_siglist[], define our own */
#define SYS_SIGLIST ap_sys_siglist
#define INIT_SIGLIST() siglist_init();
const char *ap_sys_siglist[NumSIG];
static void siglist_init(void)
{
int sig;
ap_sys_siglist[0] = "Signal 0";
#ifdef SIGHUP
ap_sys_siglist[SIGHUP] = "Hangup";
#endif
#ifdef SIGINT
ap_sys_siglist[SIGINT] = "Interrupt";
#endif
#ifdef SIGQUIT
ap_sys_siglist[SIGQUIT] = "Quit";
#endif
#ifdef SIGILL
ap_sys_siglist[SIGILL] = "Illegal instruction";
#endif
#ifdef SIGTRAP
ap_sys_siglist[SIGTRAP] = "Trace/BPT trap";
#endif
#ifdef SIGIOT
ap_sys_siglist[SIGIOT] = "IOT instruction";
#endif
#ifdef SIGABRT
ap_sys_siglist[SIGABRT] = "Abort";
#endif
#ifdef SIGEMT
ap_sys_siglist[SIGEMT] = "Emulator trap";
#endif
#ifdef SIGFPE
ap_sys_siglist[SIGFPE] = "Arithmetic exception";
#endif
#ifdef SIGKILL
ap_sys_siglist[SIGKILL] = "Killed";
#endif
#ifdef SIGBUS
ap_sys_siglist[SIGBUS] = "Bus error";
#endif
#ifdef SIGSEGV
ap_sys_siglist[SIGSEGV] = "Segmentation fault";
#endif
#ifdef SIGSYS
ap_sys_siglist[SIGSYS] = "Bad system call";
#endif
#ifdef SIGPIPE
ap_sys_siglist[SIGPIPE] = "Broken pipe";
#endif
#ifdef SIGALRM
ap_sys_siglist[SIGALRM] = "Alarm clock";
#endif
#ifdef SIGTERM
ap_sys_siglist[SIGTERM] = "Terminated";
#endif
#ifdef SIGUSR1
ap_sys_siglist[SIGUSR1] = "User defined signal 1";
#endif
#ifdef SIGUSR2
ap_sys_siglist[SIGUSR2] = "User defined signal 2";
#endif
#ifdef SIGCLD
ap_sys_siglist[SIGCLD] = "Child status change";
#endif
#ifdef SIGCHLD
ap_sys_siglist[SIGCHLD] = "Child status change";
#endif
#ifdef SIGPWR
ap_sys_siglist[SIGPWR] = "Power-fail restart";
#endif
#ifdef SIGWINCH
ap_sys_siglist[SIGWINCH] = "Window changed";
#endif
#ifdef SIGURG
ap_sys_siglist[SIGURG] = "urgent socket condition";
#endif
#ifdef SIGPOLL
ap_sys_siglist[SIGPOLL] = "Pollable event occurred";
#endif
#ifdef SIGIO
ap_sys_siglist[SIGIO] = "socket I/O possible";
#endif
#ifdef SIGSTOP
ap_sys_siglist[SIGSTOP] = "Stopped (signal)";
#endif
#ifdef SIGTSTP
ap_sys_siglist[SIGTSTP] = "Stopped";
#endif
#ifdef SIGCONT
ap_sys_siglist[SIGCONT] = "Continued";
#endif
#ifdef SIGTTIN
ap_sys_siglist[SIGTTIN] = "Stopped (tty input)";
#endif
#ifdef SIGTTOU
ap_sys_siglist[SIGTTOU] = "Stopped (tty output)";
#endif
#ifdef SIGVTALRM
ap_sys_siglist[SIGVTALRM] = "virtual timer expired";
#endif
#ifdef SIGPROF
ap_sys_siglist[SIGPROF] = "profiling timer expired";
#endif
#ifdef SIGXCPU
ap_sys_siglist[SIGXCPU] = "exceeded cpu limit";
#endif
#ifdef SIGXFSZ
ap_sys_siglist[SIGXFSZ] = "exceeded file size limit";
#endif
for (sig=0; sig < sizeof(ap_sys_siglist)/sizeof(ap_sys_siglist[0]); ++sig)
if (ap_sys_siglist[sig] == NULL)
ap_sys_siglist[sig] = "";
}
#endif /* platform has sys_siglist[] */
/* handle all varieties of core dumping signals */
static void sig_coredump(int sig)
{
chdir(ap_coredump_dir);
signal(sig, SIG_DFL);
kill(getpid(), sig);
/* At this point we've got sig blocked, because we're still inside
* the signal handler. When we leave the signal handler it will
* be unblocked, and we'll take the signal... and coredump or whatever
* is appropriate for this particular Unix. In addition the parent
* will see the real signal we received -- whereas if we called
* abort() here, the parent would only see SIGABRT.
*/
}
static void just_die(int sig)
{
clean_child_exit(0);
}
/*****************************************************************
* Connection structures and accounting...
*/
/* volatile just in case */
static int volatile shutdown_pending;
static int volatile restart_pending;
static int volatile is_graceful;
ap_generation_t volatile ap_my_generation;
/*
* ap_start_shutdown() and ap_start_restart(), below, are a first stab at
* functions to initiate shutdown or restart without relying on signals.
* Previously this was initiated in sig_term() and restart() signal handlers,
* but we want to be able to start a shutdown/restart from other sources --
* e.g. on Win32, from the service manager. Now the service manager can
* call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
* these functions can also be called by the child processes, since global
* variables are no longer used to pass on the required action to the parent.
*
* These should only be called from the parent process itself, since the
* parent process will use the shutdown_pending and restart_pending variables
* to determine whether to shutdown or restart. The child process should
* call signal_parent() directly to tell the parent to die -- this will
* cause neither of those variable to be set, which the parent will
* assume means something serious is wrong (which it will be, for the
* child to force an exit) and so do an exit anyway.
*/
void ap_start_shutdown(void)
{
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;
}
/* do a graceful restart if graceful == 1 */
void ap_start_restart(int graceful)
{
if (restart_pending == 1) {
/* Probably not an error - don't bother reporting it */
return;
}
restart_pending = 1;
is_graceful = graceful;
}
static void sig_term(int sig)
{
ap_start_shutdown();
}
static void restart(int sig)
{
#ifndef WIN32
ap_start_restart(sig == SIGWINCH);
#else
ap_start_restart(1);
#endif
}
static void set_signals(void)
{
#ifndef NO_USE_SIGACTION
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (!one_process) {
sa.sa_handler = sig_coredump;
#if defined(SA_ONESHOT)
sa.sa_flags = SA_ONESHOT;
#elif defined(SA_RESETHAND)
sa.sa_flags = SA_RESETHAND;
#endif
if (sigaction(SIGSEGV, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGSEGV)");
#ifdef SIGBUS
if (sigaction(SIGBUS, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGBUS)");
#endif
#ifdef SIGABORT
if (sigaction(SIGABORT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGABORT)");
#endif
#ifdef SIGABRT
if (sigaction(SIGABRT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGABRT)");
#endif
#ifdef SIGILL
if (sigaction(SIGILL, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGILL)");
#endif
sa.sa_flags = 0;
}
sa.sa_handler = sig_term;
if (sigaction(SIGTERM, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGTERM)");
#ifdef SIGINT
if (sigaction(SIGINT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGINT)");
#endif
#ifdef SIGXCPU
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXCPU, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGXCPU)");
#endif
#ifdef SIGXFSZ
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXFSZ, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGXFSZ)");
#endif
#ifdef SIGPIPE
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGPIPE)");
#endif
/* we want to ignore HUPs and WINCH while we're busy processing one */
sigaddset(&sa.sa_mask, SIGHUP);
sigaddset(&sa.sa_mask, SIGWINCH);
sa.sa_handler = restart;
if (sigaction(SIGHUP, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGHUP)");
if (sigaction(SIGWINCH, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"sigaction(SIGWINCH)");
#else
if (!one_process) {
signal(SIGSEGV, sig_coredump);
#ifdef SIGBUS
signal(SIGBUS, sig_coredump);
#endif /* SIGBUS */
#ifdef SIGABORT
signal(SIGABORT, sig_coredump);
#endif /* SIGABORT */
#ifdef SIGABRT
signal(SIGABRT, sig_coredump);
#endif /* SIGABRT */
#ifdef SIGILL
signal(SIGILL, sig_coredump);
#endif /* SIGILL */
#ifdef SIGXCPU
signal(SIGXCPU, SIG_DFL);
#endif /* SIGXCPU */
#ifdef SIGXFSZ
signal(SIGXFSZ, SIG_DFL);
#endif /* SIGXFSZ */
}
signal(SIGTERM, sig_term);
#ifdef SIGHUP
signal(SIGHUP, restart);
#endif /* SIGHUP */
#ifdef SIGWINCH
signal(SIGWINCH, restart);
#endif /* SIGWINCH */
#ifdef SIGPIPE
signal(SIGPIPE, SIG_IGN);
#endif /* SIGPIPE */
#endif
}
/*****************************************************************
* Here follows a long bunch of generic server bookkeeping stuff...
*/
/*****************************************************************
* Connection structures and accounting...
*/
static conn_rec *new_connection(pool *p, server_rec *server, BUFF *inout,
const struct sockaddr_in *remaddr, /* ZZZ */
const struct sockaddr_in *saddr, /* ZZZ */
int child_num, int thread_num)
{
conn_rec *conn = (conn_rec *) ap_pcalloc(p, sizeof(conn_rec));
/* Got a connection structure, so initialize what fields we can
* (the rest are zeroed out by pcalloc).
*/
conn->child_num = child_num;
conn->thread_num = thread_num;
conn->pool = p;
conn->local_addr = *saddr;
conn->base_server = server;
conn->client = inout;
conn->remote_addr = *remaddr;
conn->remote_ip = ap_pstrdup(conn->pool,
inet_ntoa(conn->remote_addr.sin_addr));
return conn;
}
#if defined(TCP_NODELAY) && !defined(MPE) && !defined(TPF)
static void sock_disable_nagle(int s) /* ZZZ abstract */
{
/* The Nagle algorithm says that we should delay sending partial
* packets in hopes of getting more data. We don't want to do
* this; we are not telnet. There are bad interactions between
* persistent connections and Nagle's algorithm that have very severe
* performance penalties. (Failing to disable Nagle is not much of a
* problem with simple HTTP.)
*
* In spite of these problems, failure here is not a shooting offense.
*/
int just_say_no = 1;
if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char *) &just_say_no,
sizeof(int)) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"setsockopt: (TCP_NODELAY)");
}
}
#else
#define sock_disable_nagle(s) /* NOOP */
#endif
static int make_sock(pool *p, const struct sockaddr_in *server)
/* abstract sockaddr_in */
{
int s;
int one = 1;
char addr[512];
if (server->sin_addr.s_addr != htonl(INADDR_ANY))
ap_snprintf(addr, sizeof(addr), "address %s port %d",
inet_ntoa(server->sin_addr), ntohs(server->sin_port));
else
ap_snprintf(addr, sizeof(addr), "port %d", ntohs(server->sin_port));
/* note that because we're about to slack we don't use psocket */
if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
"make_sock: failed to get a socket for %s", addr);
printf("make_sock: failed to get socket for %s\n", addr);
exit(1);
}
/* Solaris (probably versions 2.4, 2.5, and 2.5.1 with various levels
* of tcp patches) has some really weird bugs where if you dup the
* socket now it breaks things across SIGHUP restarts. It'll either
* be unable to bind, or it won't respond.
*/
#if defined (SOLARIS2) && SOLARIS2 < 260
#define WORKAROUND_SOLARIS_BUG
#endif
/* PR#1282 Unixware 1.x appears to have the same problem as solaris */
#if defined (UW) && UW < 200
#define WORKAROUND_SOLARIS_BUG
#endif
/* PR#1973 NCR SVR4 systems appear to have the same problem */
#if defined (MPRAS)
#define WORKAROUND_SOLARIS_BUG
#endif
#ifndef WORKAROUND_SOLARIS_BUG
s = ap_slack(s, AP_SLACK_HIGH);
ap_note_cleanups_for_socket(p, s); /* arrange to close on exec or
restart */
#endif
#ifndef MPE
/* MPE does not support SO_REUSEADDR and SO_KEEPALIVE */
#ifndef _OSD_POSIX
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof(int)) <
0) {
ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
"make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr);
printf("make_sock: failed to setsockopt for %s\n", addr);
close(s);
return 0;
}
#endif /*_OSD_POSIX*/
one = 1;
#ifndef BEOS
/* BeOS does not support SO_KEEPALIVE */
if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *) &one, sizeof(int)) <
0) {
ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
"make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr);
close(s);
return 0;
}
#endif
#endif
sock_disable_nagle(s);
/* sock_enable_linger(s); XXX - Need to reenable? - Manoj */
/*
* To send data over high bandwidth-delay connections at full
* speed we must force the TCP window to open wide enough to keep the
* pipe full. The default window size on many systems
* is only 4kB. Cross-country WAN connections of 100ms
* at 1Mb/s are not impossible for well connected sites.
* If we assume 100ms cross-country latency,
* a 4kB buffer limits throughput to 40kB/s.
*
* To avoid this problem I've added the SendBufferSize directive
* to allow the web master to configure send buffer size.
*
* The trade-off of larger buffers is that more kernel memory
* is consumed. YMMV, know your customers and your network!
*
* -John Heidemann <[EMAIL PROTECTED]> 25-Oct-96
*
* If no size is specified, use the kernel default.
*/
#ifndef BEOS /* BeOS does not support SO_SNDBUF */
if (server_conf->send_buffer_size) {
if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
(char *) &server_conf->send_buffer_size, sizeof(int)) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"make_sock: failed to set SendBufferSize for %s, "
"using default", addr);
/* not a fatal error */
}
}
#endif
#ifdef MPE
/* MPE requires CAP=PM and GETPRIVMODE to bind to ports less than 1024 */
if (ntohs(server->sin_port) < 1024)
GETPRIVMODE();
#endif
if (bind(s, (struct sockaddr *) server, sizeof(struct sockaddr_in)) ==
-1) {
ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
"make_sock: could not bind to %s", addr);
#ifdef MPE
if (ntohs(server->sin_port) < 1024)
GETUSERMODE();
#endif
close(s);
exit(1);
}
#ifdef MPE
if (ntohs(server->sin_port) < 1024)
GETUSERMODE();
#endif
if (listen(s, ap_listenbacklog) == -1) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"make_sock: unable to listen for connections on %s", addr);
close(s);
exit(1);
}
#ifdef WORKAROUND_SOLARIS_BUG
s = ap_slack(s, AP_SLACK_HIGH);
ap_note_cleanups_for_socket(p, s); /* arrange to close on exec or
restart */
#endif
#ifdef CHECK_FD_SETSIZE
/* protect various fd_sets */
if (s >= FD_SETSIZE) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, NULL,
"make_sock: problem listening on %s, filedescriptor (%u) "
"larger than FD_SETSIZE (%u) "
"found, you probably need to rebuild Apache with a "
"larger FD_SETSIZE", addr, s, FD_SETSIZE);
close(s);
return 0;
}
#endif
return s;
}
/*
* During a restart we keep track of the old listeners here, so that we
* can re-use the sockets. We have to do this because we won't be able
* to re-open the sockets ("Address already in use").
*
* Unlike the listeners ring, old_listeners is a NULL terminated list.
*
* copy_listeners() makes the copy, find_listener() finds an old listener
* and close_unused_listener() cleans up whatever wasn't used.
*/
static listen_rec *old_listeners;
/* unfortunately copy_listeners may be called before listeners is a ring */
static void copy_listeners(pool *p)
{
listen_rec *lr;
ap_assert(old_listeners == NULL);
if (ap_listeners == NULL) {
return;
}
lr = ap_listeners;
do {
listen_rec *nr = malloc(sizeof *nr);
if (nr == NULL) {
fprintf(stderr, "Ouch! malloc failed in copy_listeners()\n");
exit(1);
}
*nr = *lr;
ap_kill_cleanups_for_socket(p, nr->fd);
nr->next = old_listeners;
old_listeners = nr;
lr = lr->next;
} while (lr && lr != ap_listeners);
}
static int find_listener(listen_rec *lr)
{
listen_rec *or;
for (or = old_listeners; or; or = or->next) {
if (!memcmp(&or->local_addr, &lr->local_addr, sizeof(or->local_addr))) {
or->used = 1;
return or->fd;
}
}
return -1;
}
static void close_unused_listeners(void)
{
listen_rec *or, *next;
for (or = old_listeners; or; or = next) {
next = or->next;
if (!or->used)
closesocket(or->fd);
free(or);
}
old_listeners = NULL;
}
/* open sockets, and turn the listeners list into a singly linked ring */
static int setup_listeners(pool *p)
{
listen_rec *lr;
int fd;
int listener_count = 0;
lr = ap_listeners;
for (;;) {
fd = find_listener(lr);
if (fd < 0) {
fd = make_sock(p, &lr->local_addr);
}
else {
ap_note_cleanups_for_socket(p, fd);
}
if (fd >= 0) {
++listener_count;
}
lr->fd = fd;
if (lr->next == NULL)
break;
lr = lr->next;
}
/* turn the list into a ring */
/*
lr->next = ap_listeners;
head_listener = ap_listeners;
*/
close_unused_listeners();
#ifdef NO_SERIALIZED_ACCEPT
/* warn them about the starvation problem if they're using multiple
* sockets
*/
if (ap_listeners->next != ap_listeners) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, NULL,
"You cannot use multiple Listens safely on your system, "
"proceeding anyway. See src/PORTING, search for "
"SERIALIZED_ACCEPT.");
}
#endif
return listener_count;
}
int ap_graceful_stop_signalled(void)
{
/* XXX - Does this really work? - Manoj */
return is_graceful;
}
/*****************************************************************
* Child process main loop.
*/
static void process_socket(pool *p, struct sockaddr *sa_client, int csd, int
my_child_num, int my_thread_num)
{
struct sockaddr sa_server; /* ZZZZ */
size_t len = sizeof(struct sockaddr);
BUFF *conn_io;
conn_rec *current_conn;
ap_note_cleanups_for_fd(p, csd);
/* ZZZ change to AP func */
if (getsockname(csd, &sa_server, &len) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "getsockname");
return;
}
(void) ap_update_child_status(my_child_num, my_thread_num,
SERVER_BUSY_READ, (request_rec *) NULL);
conn_io = ap_bcreate(p, B_RDWR | B_SOCKET);
ap_bpushfd(conn_io, csd);
current_conn = new_connection(p, server_conf, conn_io,
(const struct sockaddr_in *) sa_client,
(const struct sockaddr_in *) &sa_server,
my_child_num, my_thread_num);
ap_process_connection(current_conn);
}
static void * worker_thread(void * dummy)
{
proc_info * ti = dummy;
int process_slot = ti->pid;
int thread_slot = ti->tid;
pool *tpool = ti->tpool;
struct sockaddr sa_client;
int csd;
pool *ptrans; /* Pool for per-transaction stuff */
free(ti);
ptrans = ap_make_sub_pool(tpool);
pthread_mutex_lock(&worker_thread_count_mutex);
worker_thread_count++;
pthread_mutex_unlock(&worker_thread_count_mutex);
while (1) {
(void) ap_update_child_status(process_slot, thread_slot,
SERVER_READY,
(request_rec *) NULL);
csd = get_connection(&sa_client);
if (csd < 0) {
break;
}
process_socket(ptrans, &sa_client, csd, process_slot, thread_slot);
ap_clear_pool(ptrans);
}
ap_destroy_pool(tpool);
ap_update_child_status(process_slot, thread_slot, SERVER_DEAD,
(request_rec *) NULL);
pthread_mutex_lock(&worker_thread_count_mutex);
worker_thread_count--;
if (worker_thread_count == 0) {
/* All the threads have exited, now finish the shutdown process
* by signalling the sigwait thread */
kill(my_pid, SIGTERM);
}
pthread_mutex_unlock(&worker_thread_count_mutex);
return NULL;
}
static void child_main(int child_num_arg)
{
sigset_t sig_mask;
int signal_received;
pthread_t thread;
pthread_attr_t thread_attr;
int i;
int my_child_num = child_num_arg;
proc_info *my_info = NULL;
my_pid = getpid();
pchild = ap_make_sub_pool(pconf);
/*stuff to do before we switch id's, so we have permissions.*/
reopen_scoreboard(pchild);
if (unixd_setup_child()) {
clean_child_exit(APEXIT_CHILDFATAL);
}
accept_child_init(pchild, ap_threads_per_child);
ap_child_init_hook(pchild, server_conf);
/*done with init critical section */
/* All threads should mask signals out, accoring to sigwait(2) man page */
sigemptyset(&sig_mask);
if (pthread_sigmask(SIG_SETMASK, &sig_mask, NULL) != 0) {
ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf, "pthread_sigmask");
}
/* Setup worker threads */
worker_thread_count = 0;
pthread_mutex_init(&worker_thread_count_mutex, NULL);
pthread_attr_init(&thread_attr);
pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_DETACHED);
for (i=0; i < ap_threads_per_child; i++) {
my_info = (proc_info *)malloc(sizeof(proc_info));
if (my_info == NULL) {
ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf,
"malloc: out of memory");
clean_child_exit(APEXIT_CHILDFATAL);
}
my_info->pid = my_child_num;
my_info->tid = i;
my_info->sd = 0;
my_info->tpool = ap_make_sub_pool(pchild);
/* We are creating threads right now */
(void) ap_update_child_status(my_child_num, i, SERVER_STARTING,
(request_rec *) NULL);
if (pthread_create(&thread, &thread_attr, worker_thread, my_info)) {
ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf,
"pthread_create: unable to create worker thread");
/* 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 if we exit. */
sleep(10);
clean_child_exit(APEXIT_CHILDFATAL);
}
/* We let each thread update it's own scoreboard entry. This is done
* because it let's us deal with tid better.
*/
}
pthread_attr_destroy(&thread_attr);
start_accepting_connections(my_child_num);
/* This thread will be the one responsible for handling signals */
sigemptyset(&sig_mask);
sigaddset(&sig_mask, SIGTERM);
sigaddset(&sig_mask, SIGINT);
sigwait(&sig_mask, &signal_received);
switch (signal_received) {
case SIGTERM:
case SIGINT:
just_die(signal_received);
break;
default:
ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf,
"received impossible signal: %d", signal_received);
just_die(SIGTERM);
}
}
static int make_child(server_rec *s, int slot, time_t now) /* ZZZ */
{
int pid;
if (ap_acceptors_per_child + ap_threads_per_child > HARD_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_ERR, s,
"Worker threads plus acceptor threads is greater than
HARD_THREAD_LIMIT, please correct");
exit(-1);
}
if (slot + 1 > max_daemons_limit) {
max_daemons_limit = slot + 1;
}
if (one_process) {
set_signals();
ap_scoreboard_image->parent[slot].pid = getpid();
child_main(slot);
}
if ((pid = fork()) == -1) {
ap_log_error(APLOG_MARK, APLOG_ERR, s, "fork: Unable to fork new
process");
/* 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) {
#ifdef AIX_BIND_PROCESSOR
/* By default, AIX binds to a single processor. This bit unbinds
children which will then bind to another CPU.
*/
#include <sys/processor.h>
int status = bindprocessor(BINDPROCESS, (int)getpid(),
PROCESSOR_CLASS_ANY);
if (status != OK)
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, server_conf,
"processor unbind failed %d", status);
#endif
RAISE_SIGSTOP(MAKE_CHILD);
/* XXX - For an unthreaded server, a signal handler will be necessary
signal(SIGTERM, just_die);
*/
child_main(slot);
return 0;
}
/* else */
ap_scoreboard_image->parent[slot].pid = 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(server_conf, i, 0) < 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 (32)
#endif
static int hold_off_on_exponential_spawning;
static void perform_idle_server_maintenance(void)
{
int i, j;
int idle_count_ceil, idle_count_floor, idle_thread_count;
thread_score *ss;
time_t now = 0;
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_ceil = 0;
idle_count_floor = 0;
idle_thread_count = 0;
last_non_dead = -1;
total_non_dead = 0;
ap_check_signals();
ap_sync_scoreboard_image();
for (i = 0; i < ap_daemons_limit; ++i) {
/* Initialization to satisfy the compiler. It doesn't know
* that ap_threads_per_child is always > 0 */
int status = SERVER_DEAD;
int any_dying_threads = 0;
int all_dead_threads = 1;
int idle_thread_addition = 0;
if (i >= max_daemons_limit && free_length == idle_spawn_rate)
break;
for (j = 0; j < ap_threads_per_child; j++) {
ss = &ap_scoreboard_image->servers[i][j];
status = ss->status;
any_dying_threads = any_dying_threads || (status == SERVER_DEAD)
|| (status == SERVER_GRACEFUL);
all_dead_threads = all_dead_threads && (status == SERVER_DEAD);
/* 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_thread_addition;
}
}
if (all_dead_threads && free_length < idle_spawn_rate) {
free_slots[free_length] = i;
++free_length;
}
if (!all_dead_threads) {
last_non_dead = i;
}
if (!any_dying_threads) {
++total_non_dead;
idle_thread_count += idle_thread_addition;
}
}
max_daemons_limit = last_non_dead + 1;
idle_count_floor = idle_thread_count / ap_threads_per_child;
idle_count_ceil = idle_count_floor;
if (idle_thread_count % ap_threads_per_child) {
idle_count_ceil++;
}
if (idle_count_ceil > ap_daemons_max_free) {
/* Kill off one child */
char char_of_death = '!';
if (write(ap_pipe_of_death[1], &char_of_death, 1) == -1) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "write
ap_pipe_of_death");
}
idle_spawn_rate = 1;
}
else if (idle_count_floor < ap_daemons_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_NOERRNO|APLOG_ERR, server_conf,
"server reached MaxClients setting, consider"
" raising the MaxClients setting");
reported = 1;
}
idle_spawn_rate = 1;
}
else {
/* ZZZZ */
if (idle_spawn_rate >= 8) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, server_conf,
"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_floor, total_non_dead);
}
for (i = 0; i < free_length; ++i) {
make_child(server_conf, free_slots[i], now);
}
/* 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 server_main_loop(int remaining_children_to_start)
{
int child_slot;
ap_wait_t status;
int pid;
int i;
while (!restart_pending && !shutdown_pending) {
pid = wait_or_timeout(&status);
if (pid >= 0) {
child_slot = find_child_by_pid(pid);
if (child_slot >= 0) {
for (i = 0; i < ap_threads_per_child +
ap_acceptors_per_child; i++)
ap_update_child_status(child_slot, i, SERVER_DEAD,
(request_rec *) NULL);
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
*/
/* ZZZ abstract out for AP funcs. */
make_child(server_conf, child_slot, time(NULL));
--remaining_children_to_start;
}
#ifdef HAS_OTHER_CHILD
}
else if (reap_other_child(pid, status) == 0) {
/* handled */
#endif
}
else if (is_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_NOERRNO|APLOG_WARNING,
server_conf,
"long lost child came home! (pid %d)", 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();
}
}
int ap_mpm_run(pool *_pconf, pool *plog, server_rec *s)
{
int remaining_children_to_start;
int listener_count;
pconf = _pconf;
server_conf = s;
if (pipe(ap_pipe_of_death) == -1) {
ap_log_error(APLOG_MARK, APLOG_ERR,
(const server_rec*) server_conf,
"pipe: (pipe_of_death)");
exit(1);
}
ap_note_cleanups_for_fd(pconf, ap_pipe_of_death[0]);
ap_note_cleanups_for_fd(pconf, ap_pipe_of_death[1]);
if (fcntl(ap_pipe_of_death[0], F_SETFD, O_NONBLOCK) == -1) {
ap_log_error(APLOG_MARK, APLOG_ERR,
(const server_rec*) server_conf,
"fcntl: O_NONBLOCKing (pipe_of_death)");
exit(1);
}
server_conf = s;
listener_count = setup_listeners(pconf);
ap_clear_pool(plog);
ap_open_logs(server_conf, plog);
ap_log_pid(pconf, ap_pid_fname);
accept_parent_init(pconf, listener_count);
if (!is_graceful) {
reinit_scoreboard(pconf);
}
set_signals();
/* set up get_socket */
if (ap_daemons_max_free < ap_daemons_min_free + 1) /* Don't
thrash... */
ap_daemons_max_free = ap_daemons_min_free + 1;
/* 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 SIGWINCH). 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 (!is_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 */
hold_off_on_exponential_spawning = 10;
}
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
"%s configured -- resuming normal operations",
ap_get_server_version());
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, server_conf,
"Server built: %s", ap_get_server_built());
restart_pending = shutdown_pending = 0;
server_main_loop(remaining_children_to_start);
if (shutdown_pending) {
/* Time to gracefully shut down:
* Kill child processes, tell them to call child_exit, etc...
*/
if (ap_killpg(getpgrp(), SIGTERM) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "killpg
SIGTERM");
}
reclaim_child_processes(1); /* Start with SIGTERM */
/* cleanup pid file on normal shutdown */
{
const char *pidfile = NULL;
pidfile = ap_server_root_relative (pconf, ap_pid_fname);
if ( pidfile != NULL && unlink(pidfile) == 0)
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO,
server_conf,
"removed PID file %s (pid=%ld)",
pidfile, (long)getpid());
}
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
"caught SIGTERM, shutting down");
return 1;
}
/* we've been told to restart */
signal(SIGHUP, SIG_IGN);
if (one_process) {
/* not worth thinking about */
return 1;
}
/* 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;
update_scoreboard_global();
if (is_graceful) {
int i, j;
char char_of_death = '!';
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
"SIGWINCH received. Doing graceful restart");
/* kill off the idle ones */
for (i = 0; i < ap_daemons_limit; ++i) {
if (write(ap_pipe_of_death[1], &char_of_death, 1) == -1) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "write
ap_pipe_of_death");
}
}
/* This is mostly for debugging... so that we know what is still
* gracefully dealing with existing request.
*/
for (i = 0; i < ap_daemons_limit; ++i) {
for (j = 0; j < ap_threads_per_child + ap_acceptors_per_child;
j++) {
if (ap_scoreboard_image->servers[i][j].status != SERVER_DEAD) {
ap_scoreboard_image->servers[i][j].status = SERVER_GRACEFUL;
}
}
}
}
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.
*/
if (ap_killpg(getpgrp(), SIGTERM) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "killpg
SIGTERM");
}
reclaim_child_processes(1); /* Start with SIGTERM */
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
"SIGHUP received. Attempting to restart");
}
copy_listeners(pconf);
if (!is_graceful) {
ap_restart_time = time(NULL); /* ZZZZZ */
}
return 0;
}
static void mpmt_pthread_pre_command_line(pool *pcommands)
{
INIT_SIGLIST()
one_process = 0;
}
static void mpmt_pthread_pre_config(pool *pconf, pool *plog, pool *ptemp)
{
static int restart_num = 0;
one_process = ap_exists_config_define("ONE_PROCESS");
/* sigh, want this only the second time around */
if (restart_num++ == 1) {
is_graceful = 0;
if (!one_process) {
unixd_detach();
}
my_pid = getpid();
}
unixd_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;
ap_daemons_limit = HARD_SERVER_LIMIT;
ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
ap_pid_fname = DEFAULT_PIDLOG;
ap_scoreboard_fname = DEFAULT_SCOREBOARD;
ap_lock_fname = DEFAULT_LOCKFILE;
ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
/* ZZZ Initialize the Network Address here. */
ap_bind_address.s_addr = htonl(INADDR_ANY);
ap_listeners = NULL;
ap_listenbacklog = DEFAULT_LISTENBACKLOG;
ap_extended_status = 0;
ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
}
static void mpmt_pthread_post_config(pool *pconf, pool *plog, pool *ptemp,
server_rec *s)
{
if (ap_listeners == NULL) {
/* allocate a default listener */
listen_rec *new;
new = ap_pcalloc(pconf, sizeof(listen_rec));
new->local_addr.sin_family = AF_INET;
new->local_addr.sin_addr = ap_bind_address;
new->local_addr.sin_port = htons(s->port ? s->port : DEFAULT_HTTP_PORT);
new->fd = -1;
new->next = NULL;
ap_listeners = new;
}
}
static const char *set_pidfile(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
if (cmd->server->is_virtual) {
return "PidFile directive not allowed in <VirtualHost>";
}
ap_pid_fname = arg;
return NULL;
}
static const char *set_scoreboard(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_scoreboard_fname = arg;
return NULL;
}
static const char *set_lockfile(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_lock_fname = arg;
return NULL;
}
static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, 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, char
*arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_daemons_min_free = atoi(arg);
if (ap_daemons_min_free <= 0) {
fprintf(stderr, "WARNING: detected MinSpareServers set to
non-positive.\n");
fprintf(stderr, "Resetting to 1 to avoid almost certain Apache
failure.\n");
fprintf(stderr, "Please read the documentation.\n");
ap_daemons_min_free = 1;
}
return NULL;
}
static const char *set_max_free_servers(cmd_parms *cmd, void *dummy, 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_server_limit (cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_daemons_limit = atoi(arg);
if (ap_daemons_limit > HARD_SERVER_LIMIT) {
fprintf(stderr, "WARNING: MaxClients of %d exceeds compile time limit "
"of %d servers,\n", ap_daemons_limit, HARD_SERVER_LIMIT);
fprintf(stderr, " lowering MaxClients to %d. To increase, please "
"see the\n", HARD_SERVER_LIMIT);
fprintf(stderr, " HARD_SERVER_LIMIT define in src/include/httpd.h.\n");
ap_daemons_limit = HARD_SERVER_LIMIT;
}
else if (ap_daemons_limit < 1) {
fprintf(stderr, "WARNING: Require MaxClients > 0, setting to 1\n");
ap_daemons_limit = 1;
}
return NULL;
}
static const char *set_threads_per_child (cmd_parms *cmd, void *dummy, char
*arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_threads_per_child = atoi(arg);
if (ap_threads_per_child < 1) {
fprintf(stderr, "WARNING: Require ThreadsPerChild > 0, setting to 1\n");
ap_threads_per_child = 1;
}
return NULL;
}
static const char *set_max_requests(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_max_requests_per_child = atoi(arg);
return NULL;
}
static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, char *arg)
{
struct stat finfo;
const char *fname;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
fname = ap_server_root_relative(cmd->pool, arg);
/* ZZZ change this to the AP func FileInfo*/
if ((stat(fname, &finfo) == -1) || !S_ISDIR(finfo.st_mode)) {
return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
" does not exist or is not a directory", NULL);
}
ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
return NULL;
}
static const char *set_listenbacklog(cmd_parms *cmd, void *dummy, char *arg)
{
int b;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
b = atoi(arg);
if (b < 1) {
return "ListenBacklog must be > 0";
}
ap_listenbacklog = b;
return NULL;
}
static const char *set_listener(cmd_parms *cmd, void *dummy, char *ips)
{
listen_rec *new;
char *ports;
unsigned short port;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ports = strchr(ips, ':');
if (ports != NULL) {
if (ports == ips) {
return "Missing IP address";
}
else if (ports[1] == '\0') {
return "Address must end in :<port-number>";
}
*(ports++) = '\0';
}
else {
ports = ips;
}
new=ap_pcalloc(cmd->pool, sizeof(listen_rec));
/* ZZZ let's set this using the AP funcs. */
new->local_addr.sin_family = AF_INET;
if (ports == ips) { /* no address */
/* ZZZ Initialize the Network Address */
new->local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
}
else {
new->local_addr.sin_addr.s_addr = ap_get_virthost_addr(ips, NULL);
}
port = atoi(ports);
if (!port) {
return "Port must be numeric";
}
/* ZZZ change to AP funcs.*/
new->local_addr.sin_port = htons(port);
new->fd = -1; /*ZZZ change to NULL */
new->used = 0;
new->next = ap_listeners;
ap_listeners = new;
return NULL;
}
struct ap_thread_mutex {
pthread_mutex_t mutex;
};
API_EXPORT(ap_thread_mutex *) ap_thread_mutex_new(void)
{
ap_thread_mutex *mtx;
mtx = malloc(sizeof(ap_thread_mutex));
pthread_mutex_init(&(mtx->mutex), NULL);
return mtx;
}
API_EXPORT(void) ap_thread_mutex_lock(ap_thread_mutex *mtx)
{
/* Ignoring error conditions here. :( */
pthread_mutex_lock(&(mtx->mutex));
}
API_EXPORT(void) ap_thread_mutex_unlock(ap_thread_mutex *mtx)
{
/* Here too. */
pthread_mutex_unlock(&(mtx->mutex));
}
API_EXPORT(void) ap_thread_mutex_destroy(ap_thread_mutex *mtx)
{
/* Here too. */
pthread_mutex_destroy(&(mtx->mutex));
free(mtx);
}
static const command_rec mpmt_pthread_cmds[] = {
{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
"A file for logging the server process ID"},
{ "ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, TAKE1,
"A file for Apache to maintain runtime process management information"},
{ "LockFile", set_lockfile, NULL, RSRC_CONF, TAKE1,
"The lockfile used when Apache needs to lock the accept() call"},
{ "StartServers", set_daemons_to_start, NULL, RSRC_CONF, TAKE1,
"Number of child processes launched at server startup" },
{ "MinSpareServers", set_min_free_servers, NULL, RSRC_CONF, TAKE1,
"Minimum number of idle children, to handle request spikes" },
{ "MaxSpareServers", set_max_free_servers, NULL, RSRC_CONF, TAKE1,
"Maximum number of idle children" },
{ "MaxClients", set_server_limit, NULL, RSRC_CONF, TAKE1,
"Maximum number of children alive at the same time" },
{ "ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF, TAKE1,
"Number of threads each child creates" },
{ "MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, TAKE1,
"Maximum number of requests a particular child serves before dying." },
{ "CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, TAKE1,
"The location of the directory Apache changes to before dumping core" },
{ "ListenBacklog", set_listenbacklog, NULL, RSRC_CONF, TAKE1,
"Maximum length of the queue of pending connections, as used by listen(2)"
},
{ "Listen", set_listener, NULL, RSRC_CONF, TAKE1,
"A port number or a numeric IP address and a port number"},
{ NULL }
};
module MODULE_VAR_EXPORT mpm_mpmt_pthread_module = {
STANDARD20_MODULE_STUFF,
mpmt_pthread_pre_command_line, /* pre_command_line */
mpmt_pthread_pre_config, /* pre_config */
mpmt_pthread_post_config, /* post_config */
NULL, /* open_logs */
NULL, /* child_init */
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_pthread_cmds, /* command table */
NULL, /* handlers */
NULL, /* translate_handler */
NULL, /* check_user_id */
NULL, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
NULL, /* pre-run fixups */
NULL, /* logger */
NULL, /* header parser */
NULL /* post_read_request */
};
/* force Expat to be linked into the server executable */
#if defined(USE_EXPAT) && !defined(SHARED_CORE_BOOTSTRAP)
#include "xmlparse.h"
const XML_LChar *suck_in_expat(void);
const XML_LChar *suck_in_expat(void)
{
return XML_ErrorString(XML_ERROR_NONE);
}
#endif /* USE_EXPAT */
#include "acceptlock.c"
#include "http_accept.c"
#include "scoreboard.c"
1.1 apache-2.0/mpm/src/modules/mpm/scoreboard.c
Index: scoreboard.c
===================================================================
#include "httpd.h"
#include "http_log.h"
#include "http_main.h"
#include "http_core.h"
#include "http_conf_globals.h"
#include "scoreboard.h"
#ifdef USE_SHMGET_SCOREBOARD
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#endif
#ifdef USE_OS2_SCOREBOARD
/* Add MMAP style functionality to OS/2 */
#define INCL_DOSMEMMGR
#define INCL_DOSEXCEPTIONS
#define INCL_DOSSEMAPHORES
#include <os2.h>
#include <umalloc.h>
#include <stdio.h>
caddr_t create_shared_heap(const char *, size_t);
caddr_t get_shared_heap(const char *);
#endif
scoreboard *ap_scoreboard_image = NULL;
static char *ap_server_argv0=NULL;
extern pool * pconf;
/*****************************************************************
*
* Dealing with the scoreboard... a lot of these variables are global
* only to avoid getting clobbered by the longjmp() that happens when
* a hard timeout expires...
*
* We begin with routines which deal with the file itself...
*/
#ifdef MULTITHREAD
/*
* In the multithreaded mode, have multiple threads - not multiple
* processes that need to talk to each other. Just use a simple
* malloc. But let the routines that follow, think that you have
* shared memory (so they use memcpy etc.)
*/
void reinit_scoreboard(pool *p)
{
ap_assert(!ap_scoreboard_image);
ap_scoreboard_image = (scoreboard *) malloc(SCOREBOARD_SIZE);
if (ap_scoreboard_image == NULL) {
fprintf(stderr, "Ouch! Out of memory reiniting scoreboard!\n");
}
memset(ap_scoreboard_image, 0, SCOREBOARD_SIZE);
}
void cleanup_scoreboard(void)
{
ap_assert(ap_scoreboard_image);
free(ap_scoreboard_image);
ap_scoreboard_image = NULL;
}
API_EXPORT(void) ap_sync_scoreboard_image(void)
{
}
#else /* MULTITHREAD */
#if defined(USE_OS2_SCOREBOARD)
/* The next two routines are used to access shared memory under OS/2. */
/* This requires EMX v09c to be installed. */
caddr_t create_shared_heap(const char *name, size_t size)
{
ULONG rc;
void *mem;
Heap_t h;
rc = DosAllocSharedMem(&mem, name, size,
PAG_COMMIT | PAG_READ | PAG_WRITE);
if (rc != 0)
return NULL;
h = _ucreate(mem, size, !_BLOCK_CLEAN, _HEAP_REGULAR | _HEAP_SHARED,
NULL, NULL);
if (h == NULL)
DosFreeMem(mem);
return (caddr_t) h;
}
caddr_t get_shared_heap(const char *Name)
{
PVOID BaseAddress; /* Pointer to the base address of
the shared memory object */
ULONG AttributeFlags; /* Flags describing characteristics
of the shared memory object */
APIRET rc; /* Return code */
/* Request read and write access to */
/* the shared memory object */
AttributeFlags = PAG_WRITE | PAG_READ;
rc = DosGetNamedSharedMem(&BaseAddress, Name, AttributeFlags);
if (rc != 0) {
printf("DosGetNamedSharedMem error: return code = %ld", rc);
return 0;
}
return BaseAddress;
}
static void setup_shared_mem(pool *p)
{
caddr_t m;
int rc;
m = (caddr_t) create_shared_heap("\\SHAREMEM\\SCOREBOARD",
SCOREBOARD_SIZE);
if (m == 0) {
fprintf(stderr, "%s: Could not create OS/2 Shared memory pool.\n",
ap_server_argv0);
exit(APEXIT_INIT);
}
rc = _uopen((Heap_t) m);
if (rc != 0) {
fprintf(stderr,
"%s: Could not uopen() newly created OS/2 Shared memory
pool.\n",
ap_server_argv0);
}
ap_scoreboard_image = (scoreboard *) m;
ap_scoreboard_image->global.running_generation = 0;
}
API_EXPORT(void) reopen_scoreboard(pool *p)
{
caddr_t m;
int rc;
m = (caddr_t) get_shared_heap("\\SHAREMEM\\SCOREBOARD");
if (m == 0) {
fprintf(stderr, "%s: Could not find existing OS/2 Shared memory
pool.\n",
ap_server_argv0);
exit(APEXIT_INIT);
}
rc = _uopen((Heap_t) m);
ap_scoreboard_image = (scoreboard *) m;
}
#elif defined(USE_POSIX_SCOREBOARD)
#include <sys/mman.h>
/*
* POSIX 1003.4 style
*
* Note 1:
* As of version 4.23A, shared memory in QNX must reside under /dev/shmem,
* where no subdirectories allowed.
*
* POSIX shm_open() and shm_unlink() will take care about this issue,
* but to avoid confusion, I suggest to redefine scoreboard file name
* in httpd.conf to cut "logs/" from it. With default setup actual name
* will be "/dev/shmem/logs.apache_status".
*
* If something went wrong and Apache did not unlinked this object upon
* exit, you can remove it manually, using "rm -f" command.
*
* Note 2:
* <sys/mman.h> in QNX defines MAP_ANON, but current implementation
* does NOT support BSD style anonymous mapping. So, the order of
* conditional compilation is important:
* this #ifdef section must be ABOVE the next one (BSD style).
*
* I tested this stuff and it works fine for me, but if it provides
* trouble for you, just comment out USE_MMAP_SCOREBOARD in QNX section
* of ap_config.h
*
* June 5, 1997,
* Igor N. Kovalenko -- [EMAIL PROTECTED]
*/
static void cleanup_shared_mem(void *d)
{
shm_unlink(ap_scoreboard_fname);
}
static void setup_shared_mem(pool *p)
{
char buf[512];
caddr_t m;
int fd;
fd = shm_open(ap_scoreboard_fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if (fd == -1) {
ap_snprintf(buf, sizeof(buf), "%s: could not open(create) scoreboard",
ap_server_argv0);
perror(buf);
exit(APEXIT_INIT);
}
if (ltrunc(fd, (off_t) SCOREBOARD_SIZE, SEEK_SET) == -1) {
ap_snprintf(buf, sizeof(buf), "%s: could not ltrunc scoreboard",
ap_server_argv0);
perror(buf);
shm_unlink(ap_scoreboard_fname);
exit(APEXIT_INIT);
}
if ((m = (caddr_t) mmap((caddr_t) 0,
(size_t) SCOREBOARD_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, (off_t) 0)) == (caddr_t) - 1) {
ap_snprintf(buf, sizeof(buf), "%s: cannot mmap scoreboard",
ap_server_argv0);
perror(buf);
shm_unlink(ap_scoreboard_fname);
exit(APEXIT_INIT);
}
close(fd);
ap_register_cleanup(p, NULL, cleanup_shared_mem, ap_null_cleanup);
ap_scoreboard_image = (scoreboard *) m;
ap_scoreboard_image->global.running_generation = 0;
}
API_EXPORT(void) reopen_scoreboard(pool *p)
{
}
#elif defined(USE_MMAP_SCOREBOARD)
static void setup_shared_mem(pool *p)
{
caddr_t m;
#if defined(MAP_ANON)
/* BSD style */
#ifdef CONVEXOS11
/*
* 9-Aug-97 - Jeff Venters ([EMAIL PROTECTED])
* ConvexOS maps address space as follows:
* 0x00000000 - 0x7fffffff : Kernel
* 0x80000000 - 0xffffffff : User
* Start mmapped area 1GB above start of text.
*
* Also, the length requires a pointer as the actual length is
* returned (rounded up to a page boundary).
*/
{
unsigned len = SCOREBOARD_SIZE;
m = mmap((caddr_t) 0xC0000000, &len,
PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, NOFD, 0);
}
#elif defined(MAP_TMPFILE)
{
char mfile[] = "/tmp/apache_shmem_XXXX";
int fd = mkstemp(mfile);
if (fd == -1) {
perror("open");
fprintf(stderr, "%s: Could not open %s\n", ap_server_argv0, mfile);
exit(APEXIT_INIT);
}
m = mmap((caddr_t) 0, SCOREBOARD_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (m == (caddr_t) - 1) {
perror("mmap");
fprintf(stderr, "%s: Could not mmap %s\n", ap_server_argv0, mfile);
exit(APEXIT_INIT);
}
close(fd);
unlink(mfile);
}
#else
m = mmap((caddr_t) 0, SCOREBOARD_SIZE,
PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0);
#endif
if (m == (caddr_t) - 1) {
perror("mmap");
fprintf(stderr, "%s: Could not mmap memory\n", ap_server_argv0);
exit(APEXIT_INIT);
}
#else
/* Sun style */
int fd;
fd = open("/dev/zero", O_RDWR);
if (fd == -1) {
perror("open");
fprintf(stderr, "%s: Could not open /dev/zero\n", ap_server_argv0);
exit(APEXIT_INIT);
}
m = mmap((caddr_t) 0, SCOREBOARD_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (m == (caddr_t) - 1) {
perror("mmap");
fprintf(stderr, "%s: Could not mmap /dev/zero\n", ap_server_argv0);
exit(APEXIT_INIT);
}
close(fd);
#endif
ap_scoreboard_image = (scoreboard *) m;
ap_scoreboard_image->global.running_generation = 0;
}
API_EXPORT(void) reopen_scoreboard(pool *p)
{
}
#elif defined(USE_SHMGET_SCOREBOARD)
static key_t shmkey = IPC_PRIVATE;
static int shmid = -1;
static void setup_shared_mem(pool *p)
{
struct shmid_ds shmbuf;
const server_rec * server_conf = ap_get_server_conf();
#ifdef MOVEBREAK
char *obrk;
#endif
if ((shmid = shmget(shmkey, SCOREBOARD_SIZE, IPC_CREAT | SHM_R | SHM_W))
== -1) {
#ifdef LINUX
if (errno == ENOSYS) {
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, server_conf,
"Your kernel was built without CONFIG_SYSVIPC\n"
"%s: Please consult the Apache FAQ for details",
ap_server_argv0);
}
#endif
ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
"could not call shmget");
exit(APEXIT_INIT);
}
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, server_conf,
"created shared memory segment #%d", shmid);
#ifdef MOVEBREAK
/*
* Some SysV systems place the shared segment WAY too close
* to the dynamic memory break point (sbrk(0)). This severely
* limits the use of malloc/sbrk in the program since sbrk will
* refuse to move past that point.
*
* To get around this, we move the break point "way up there",
* attach the segment and then move break back down. Ugly
*/
if ((obrk = sbrk(MOVEBREAK)) == (char *) -1) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"sbrk() could not move break");
}
#endif
#define BADSHMAT ((scoreboard *)(-1))
if ((ap_scoreboard_image = (scoreboard *) shmat(shmid, 0, 0)) ==
BADSHMAT) {
ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf, "shmat error");
/*
* We exit below, after we try to remove the segment
*/
}
else { /* only worry about permissions if we attached
the segment */
if (shmctl(shmid, IPC_STAT, &shmbuf) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"shmctl() could not stat segment #%d", shmid);
}
else {
shmbuf.shm_perm.uid = unixd_config.user_id;
shmbuf.shm_perm.gid = unixd_config.group_id;
if (shmctl(shmid, IPC_SET, &shmbuf) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"shmctl() could not set segment #%d", shmid);
}
}
}
/*
* We must avoid leaving segments in the kernel's
* (small) tables.
*/
if (shmctl(shmid, IPC_RMID, NULL) != 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"shmctl: IPC_RMID: could not remove shared memory segment #%d",
shmid);
}
if (ap_scoreboard_image == BADSHMAT) /* now bailout */
exit(APEXIT_INIT);
#ifdef MOVEBREAK
if (obrk == (char *) -1)
return; /* nothing else to do */
if (sbrk(-(MOVEBREAK)) == (char *) -1) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"sbrk() could not move break back");
}
#endif
ap_scoreboard_image->global.running_generation = 0;
}
API_EXPORT(void) reopen_scoreboard(pool *p)
{
}
#else
#define SCOREBOARD_FILE
static scoreboard _scoreboard_image;
static int scoreboard_fd = -1;
/* XXX: things are seriously screwed if we ever have to do a partial
* read or write ... we could get a corrupted scoreboard
*/
static int force_write(int fd, void *buffer, int bufsz)
{
int rv, orig_sz = bufsz;
do {
rv = write(fd, buffer, bufsz);
if (rv > 0) {
buffer = (char *) buffer + rv;
bufsz -= rv;
}
} while ((rv > 0 && bufsz > 0) || (rv == -1 && errno == EINTR));
return rv < 0 ? rv : orig_sz - bufsz;
}
static int force_read(int fd, void *buffer, int bufsz)
{
int rv, orig_sz = bufsz;
do {
rv = read(fd, buffer, bufsz);
if (rv > 0) {
buffer = (char *) buffer + rv;
bufsz -= rv;
}
} while ((rv > 0 && bufsz > 0) || (rv == -1 && errno == EINTR));
return rv < 0 ? rv : orig_sz - bufsz;
}
static void cleanup_scoreboard_file(void *foo)
{
unlink(ap_scoreboard_fname);
}
API_EXPORT(void) reopen_scoreboard(pool *p)
{
if (scoreboard_fd != -1)
ap_pclosef(p, scoreboard_fd);
scoreboard_fd = ap_popenf(p, ap_scoreboard_fname, O_CREAT | O_BINARY |
O_RDWR, 0666);
if (scoreboard_fd == -1) {
perror(ap_scoreboard_fname);
fprintf(stderr, "Cannot open scoreboard file:\n");
clean_child_exit(1);
}
}
#endif
/* Called by parent process */
void reinit_scoreboard(pool *p)
{
int running_gen = 0;
if (ap_scoreboard_image)
running_gen = ap_scoreboard_image->global.running_generation;
#ifndef SCOREBOARD_FILE
if (ap_scoreboard_image == NULL) {
setup_shared_mem(p);
}
memset(ap_scoreboard_image, 0, SCOREBOARD_SIZE);
ap_scoreboard_image->global.running_generation = running_gen;
#else
ap_scoreboard_image = &_scoreboard_image;
ap_scoreboard_fname = ap_server_root_relative(p, ap_scoreboard_fname);
scoreboard_fd = ap_popenf(p, ap_scoreboard_fname, O_CREAT | O_BINARY |
O_RDWR, 0644);
if (scoreboard_fd == -1) {
perror(ap_scoreboard_fname);
fprintf(stderr, "Cannot open scoreboard file:\n");
exit(APEXIT_INIT);
}
ap_register_cleanup(p, NULL, cleanup_scoreboard_file, ap_null_cleanup);
memset((char *) ap_scoreboard_image, 0, sizeof(*ap_scoreboard_image));
ap_scoreboard_image->global.running_generation = running_gen;
force_write(scoreboard_fd, ap_scoreboard_image,
sizeof(*ap_scoreboard_image));
#endif
}
/* Routines called to deal with the scoreboard image
* --- note that we do *not* need write locks, since update_child_status
* only updates a *single* record in place, and only one process writes to
* a given scoreboard slot at a time (either the child process owning that
* slot, or the parent, noting that the child has died).
*
* As a final note --- setting the score entry to getpid() is always safe,
* since when the parent is writing an entry, it's only noting SERVER_DEAD
* anyway.
*/
ap_inline void ap_sync_scoreboard_image(void)
{
#ifdef SCOREBOARD_FILE
lseek(scoreboard_fd, 0L, 0);
force_read(scoreboard_fd, ap_scoreboard_image,
sizeof(*ap_scoreboard_image));
#endif
}
#endif /* MULTITHREAD */
API_EXPORT(int) ap_exists_scoreboard_image(void)
{
return (ap_scoreboard_image ? 1 : 0);
}
static ap_inline void put_scoreboard_info(int child_num, int thread_num,
thread_score *new_score_rec)
{
/* XXX - needs to be fixed to account for threads */
#ifdef SCOREBOARD_FILE
lseek(scoreboard_fd, (long) child_num * sizeof(thread_score), 0);
force_write(scoreboard_fd, new_score_rec, sizeof(thread_score));
#endif
}
void update_scoreboard_global(void)
{
#ifdef SCOREBOARD_FILE
lseek(scoreboard_fd,
(char *) &ap_scoreboard_image->global -(char *) ap_scoreboard_image,
0);
force_write(scoreboard_fd, &ap_scoreboard_image->global,
sizeof ap_scoreboard_image->global);
#endif
}
void increment_counts(int child_num, int thread_num, request_rec *r)
{
long int bs = 0;
thread_score *ss;
ss = &ap_scoreboard_image->servers[child_num][thread_num];
if (r->sent_bodyct)
ap_bgetopt(r->connection->client, BO_BYTECT, &bs);
#ifndef NO_TIMES
times(&ss->times);
#endif
ss->access_count++;
ss->my_access_count++;
ss->conn_count++;
ss->bytes_served += (unsigned long) bs;
ss->my_bytes_served += (unsigned long) bs;
ss->conn_bytes += (unsigned long) bs;
put_scoreboard_info(child_num, thread_num, ss);
}
API_EXPORT(int) find_child_by_pid(int pid)
{
int i;
int max_daemons_limit = ap_get_max_daemons();
for (i = 0; i < max_daemons_limit; ++i)
if (ap_scoreboard_image->parent[i].pid == pid)
return i;
return -1;
}
int ap_update_child_status(int child_num, int thread_num, int status,
request_rec *r)
{
int old_status;
thread_score *ss;
parent_score *ps;
if (child_num < 0)
return -1;
ss = &ap_scoreboard_image->servers[child_num][thread_num];
old_status = ss->status;
ss->status = status;
ps = &ap_scoreboard_image->parent[child_num];
if ((status == SERVER_READY || status == SERVER_ACCEPTING)
&& old_status == SERVER_STARTING) {
ss->tid = pthread_self();
ps->worker_threads = ap_threads_per_child;
ps->acceptor_threads = ap_acceptors_per_child;
}
if (ap_extended_status) {
if (status == SERVER_READY || status == SERVER_DEAD) {
/*
* Reset individual counters
*/
if (status == SERVER_DEAD) {
ss->my_access_count = 0L;
ss->my_bytes_served = 0L;
}
ss->conn_count = (unsigned short) 0;
ss->conn_bytes = (unsigned long) 0;
}
if (r) {
conn_rec *c = r->connection;
ap_cpystrn(ss->client, ap_get_remote_host(c, r->per_dir_config,
REMOTE_NOLOOKUP), sizeof(ss->client));
if (r->the_request == NULL) {
ap_cpystrn(ss->request, "NULL", sizeof(ss->request));
} else if (r->parsed_uri.password == NULL) {
ap_cpystrn(ss->request, r->the_request,
sizeof(ss->request));
} else {
/* Don't reveal the password in the server-status view */
ap_cpystrn(ss->request, ap_pstrcat(r->pool, r->method, " ",
ap_unparse_uri_components(r->pool, &r->parsed_uri, UNP_OMITPASSWORD),
r->assbackwards ? NULL : " ",
r->protocol, NULL),
sizeof(ss->request));
}
ss->vhostrec = r->server;
}
}
put_scoreboard_info(child_num, thread_num, ss);
return old_status;
}
void ap_time_process_request(int child_num, int thread_num, int status)
{
thread_score *ss;
if (child_num < 0)
return;
ss = &ap_scoreboard_image->servers[child_num][thread_num];
if (status == START_PREQUEST) {
/*ss->start_time = GetCurrentTime(); ZZZ return time in uS since the
epoch. Some platforms do not support gettimeofday. Create a routine
to get the current time is some useful units. */
if (gettimeofday(&ss->start_time, (struct timezone *) 0) < 0) {
ss->start_time.tv_sec = ss->start_time.tv_usec = 0L;
}
}
else if (status == STOP_PREQUEST) {
/*ss->stop_time = GetCurrentTime();
ZZZ return time in uS since the epoch */
if (gettimeofday(&ss->stop_time, (struct timezone *) 0) < 0) {
ss->start_time.tv_sec = ss->start_time.tv_usec = 0L;
}
}
put_scoreboard_info(child_num, thread_num, ss);
}
