diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild')
5 files changed, 0 insertions, 2186 deletions
diff --git a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/Makefile.in b/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/Makefile.in deleted file mode 100644 index 374f1306..00000000 --- a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/Makefile.in +++ /dev/null @@ -1,5 +0,0 @@ - -LTLIBRARY_NAME = libperchild.la -LTLIBRARY_SOURCES = perchild.c - -include $(top_srcdir)/build/ltlib.mk diff --git a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/config5.m4 b/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/config5.m4 deleted file mode 100644 index 368052f5..00000000 --- a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/config5.m4 +++ /dev/null @@ -1,6 +0,0 @@ -dnl ## XXX - Need a more thorough check of the proper flags to use - -if test "$MPM_NAME" = "perchild" ; then - AC_CHECK_FUNCS(pthread_kill) - APACHE_FAST_OUTPUT(server/mpm/$MPM_SUBDIR_NAME/Makefile) -fi diff --git a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/mpm.h b/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/mpm.h deleted file mode 100644 index 84e808db..00000000 --- a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/mpm.h +++ /dev/null @@ -1,59 +0,0 @@ -/* Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "httpd.h" -#include "mpm_default.h" -#include "unixd.h" - -#ifndef APACHE_MPM_PERCHILD_H -#define APACHE_MPM_PERCHILD_H - -#define PERCHILD_MPM - -#define MPM_NAME "Perchild" - -#define AP_MPM_WANT_RECLAIM_CHILD_PROCESSES -#define AP_MPM_WANT_WAIT_OR_TIMEOUT -#define AP_MPM_WANT_PROCESS_CHILD_STATUS -#define AP_MPM_WANT_SET_PIDFILE -#define AP_MPM_WANT_SET_SCOREBOARD -#define AP_MPM_WANT_SET_LOCKFILE -#define AP_MPM_WANT_SET_MAX_REQUESTS -#define AP_MPM_WANT_SET_COREDUMPDIR -#define AP_MPM_WANT_SET_ACCEPT_LOCK_MECH -#define AP_MPM_WANT_SIGNAL_SERVER -#define AP_MPM_WANT_FATAL_SIGNAL_HANDLER -#define AP_MPM_USES_POD - -#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid) -#define MPM_NOTE_CHILD_KILLED(i) (MPM_CHILD_PID(i) = 0) -#define MPM_ACCEPT_FUNC unixd_accept - -/* Table of child status */ -#define SERVER_DEAD 0 -#define SERVER_DYING 1 -#define SERVER_ALIVE 2 - -typedef struct ap_ctable{ - pid_t pid; - unsigned char status; -} ap_ctable; - -extern int ap_threads_per_child; -extern int ap_max_daemons_limit; -extern server_rec *ap_server_conf; - -#endif /* APACHE_MPM_PERCHILD_H */ diff --git a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/mpm_default.h b/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/mpm_default.h deleted file mode 100644 index ece876b5..00000000 --- a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/mpm_default.h +++ /dev/null @@ -1,71 +0,0 @@ -/* Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef APACHE_MPM_DEFAULT_H -#define APACHE_MPM_DEFAULT_H - -/* Number of threads to spawn off by default --- also, if fewer than - * this free when the caretaker checks, it will spawn more. - */ -#ifndef DEFAULT_START_THREAD -#define DEFAULT_START_THREAD 5 -#endif - -/* Maximum number of *free* server threads --- more than this, and - * they will die off. - */ - -#ifndef DEFAULT_MAX_SPARE_THREAD -#define DEFAULT_MAX_SPARE_THREAD 10 -#endif - -/* Minimum --- fewer than this, and more will be created */ - -#ifndef DEFAULT_MIN_SPARE_THREAD -#define DEFAULT_MIN_SPARE_THREAD 5 -#endif - -/* Number of servers to spawn off by default - */ -#ifndef DEFAULT_NUM_DAEMON -#define DEFAULT_NUM_DAEMON 2 -#endif - -/* File used for accept locking, when we use a file */ -#ifndef DEFAULT_LOCKFILE -#define DEFAULT_LOCKFILE DEFAULT_REL_RUNTIMEDIR "/accept.lock" -#endif - -/* Where the main/parent process's pid is logged */ -#ifndef DEFAULT_PIDLOG -#define DEFAULT_PIDLOG DEFAULT_REL_RUNTIMEDIR "/httpd.pid" -#endif - -/* - * Interval, in microseconds, between scoreboard maintenance. - */ -#ifndef SCOREBOARD_MAINTENANCE_INTERVAL -#define SCOREBOARD_MAINTENANCE_INTERVAL 1000000 -#endif - -/* Number of requests to try to handle in a single process. If <= 0, - * the children don't die off. - */ -#ifndef DEFAULT_MAX_REQUESTS_PER_CHILD -#define DEFAULT_MAX_REQUESTS_PER_CHILD 10000 -#endif - -#endif /* AP_MPM_DEFAULT_H */ diff --git a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/perchild.c b/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/perchild.c deleted file mode 100644 index 8b205beb..00000000 --- a/rubbos/app/httpd-2.0.64/server/mpm/experimental/perchild/perchild.c +++ /dev/null @@ -1,2045 +0,0 @@ -/* Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "apr_hash.h" -#include "apr_strings.h" -#include "apr_pools.h" -#include "apr_portable.h" -#include "apr_file_io.h" -#include "apr_signal.h" - -#define APR_WANT_IOVEC -#include "apr_want.h" - -#if APR_HAVE_UNISTD_H -#include <unistd.h> -#endif -#if APR_HAVE_SYS_SOCKET_H -#include <sys/socket.h> -#endif - -#if !APR_HAS_THREADS -#error The perchild MPM requires APR threads, but they are unavailable. -#endif - -#define CORE_PRIVATE - -#include "ap_config.h" -#include "httpd.h" -#include "http_main.h" -#include "http_log.h" -#include "http_config.h" /* for read_config */ -#include "http_core.h" /* for get_remote_host */ -#include "http_protocol.h" -#include "http_connection.h" -#include "ap_mpm.h" -#include "unixd.h" -#include "mpm_common.h" -#include "ap_listen.h" -#include "mpm_default.h" -#include "mpm.h" -#include "scoreboard.h" -#include "util_filter.h" -#include "apr_poll.h" - -#ifdef HAVE_POLL_H -#include <poll.h> -#endif -#ifdef HAVE_SYS_POLL_H -#include <sys/poll.h> -#endif - -/* ### should be APR-ized */ -#include <grp.h> -#include <pwd.h> -#include <sys/stat.h> -#include <sys/un.h> -#include <setjmp.h> -#ifdef HAVE_SYS_PROCESSOR_H -#include <sys/processor.h> /* for bindprocessor() */ -#endif - -/* - * Define some magic numbers that we use for the state of the incomming - * request. These must be < 0 so they don't collide with a file descriptor. - */ -#define AP_PERCHILD_THISCHILD -1 -#define AP_PERCHILD_OTHERCHILD -2 - -/* Limit on the threads per process. Clients will be locked out if more than - * this * server_limit are needed. - * - * We keep this for one reason it keeps the size of the scoreboard file small - * enough that we can read the whole thing without worrying too much about - * the overhead. - */ -#ifndef DEFAULT_THREAD_LIMIT -#define DEFAULT_THREAD_LIMIT 64 -#endif - -/* Admin can't tune ThreadLimit beyond MAX_THREAD_LIMIT. We want - * some sort of compile-time limit to help catch typos. - */ -#ifndef MAX_THREAD_LIMIT -#define MAX_THREAD_LIMIT 20000 -#endif - -/* Limit on the total --- clients will be locked out if more servers than - * this are needed. It is intended solely to keep the server from crashing - * when things get out of hand. - * - * We keep a hard maximum number of servers, for two reasons --- first off, - * in case something goes seriously wrong, we want to stop the fork bomb - * short of actually crashing the machine we're running on by filling some - * kernel table. Secondly, it keeps the size of the scoreboard file small - * enough that we can read the whole thing without worrying too much about - * the overhead. - */ -#ifndef DEFAULT_SERVER_LIMIT -#define DEFAULT_SERVER_LIMIT 8 -#endif - -/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want - * some sort of compile-time limit to help catch typos. - */ -#ifndef MAX_SERVER_LIMIT -#define MAX_SERVER_LIMIT 20000 -#endif - -/* - * Actual definitions of config globals - */ - -static int threads_to_start = 0; /* Worker threads per child */ -static int min_spare_threads = 0; -static int max_spare_threads = 0; -static int max_threads = 0; -static int server_limit = DEFAULT_SERVER_LIMIT; -static int first_server_limit; -static int thread_limit = DEFAULT_THREAD_LIMIT; -static int first_thread_limit; -static int changed_limit_at_restart; -static int num_daemons = 0; -static int curr_child_num = 0; -static int workers_may_exit = 0; -static int requests_this_child; -static int num_listensocks = 0; -static ap_pod_t *pod; -static jmp_buf jmpbuffer; - -struct child_info_t { - uid_t uid; - gid_t gid; - int input; /* The socket descriptor */ - int output; /* The socket descriptor */ -}; - -typedef struct { - const char *sockname; /* The base name for the socket */ - const char *fullsockname; /* socket base name + extension */ - int input; /* The socket descriptor */ - int output; /* The socket descriptor */ -} perchild_server_conf; - -typedef struct child_info_t child_info_t; - -/* Tables used to determine the user and group each child process should - * run as. The hash table is used to correlate a server name with a child - * process. - */ -static child_info_t *child_info_table; -static int *thread_socket_table; -struct ap_ctable *ap_child_table; - -/* - * The max child slot ever assigned, preserved across restarts. Necessary - * to deal with NumServers changes across AP_SIG_GRACEFUL restarts. We - * use this value to optimize routines that have to scan the entire child - * table. - * - * XXX - It might not be worth keeping this code in. There aren't very - * many child processes in this MPM. - */ -int ap_max_daemons_limit = -1; -int ap_threads_per_child; /* XXX not part of API! axe it! */ - -module AP_MODULE_DECLARE_DATA mpm_perchild_module; - -static apr_file_t *pipe_of_death_in = NULL; -static apr_file_t *pipe_of_death_out = NULL; -static apr_thread_mutex_t *pipe_of_death_mutex; - -/* *Non*-shared http_main globals... */ - -server_rec *ap_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 - -static apr_pool_t *pconf; /* Pool for config stuff */ -static apr_pool_t *pchild; /* Pool for httpd child stuff */ -static apr_pool_t *thread_pool_parent; /* Parent of per-thread pools */ -static apr_thread_mutex_t *thread_pool_parent_mutex; - -static int child_num; -static unsigned 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 apr_thread_mutex_t *worker_thread_count_mutex; -static int *worker_thread_free_ids; -static apr_threadattr_t *worker_thread_attr; - -/* Keep track of the number of idle worker threads */ -static int idle_thread_count; -static apr_thread_mutex_t *idle_thread_count_mutex; - -/* Locks for accept serialization */ -#ifdef NO_SERIALIZED_ACCEPT -#define SAFE_ACCEPT(stmt) APR_SUCCESS -#else -#define SAFE_ACCEPT(stmt) (stmt) -static apr_proc_mutex_t *process_accept_mutex; -#endif /* NO_SERIALIZED_ACCEPT */ -static apr_thread_mutex_t *thread_accept_mutex; - -AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result) -{ - switch(query_code){ - case AP_MPMQ_MAX_DAEMON_USED: - *result = ap_max_daemons_limit; - return APR_SUCCESS; - case AP_MPMQ_IS_THREADED: - *result = AP_MPMQ_DYNAMIC; - return APR_SUCCESS; - case AP_MPMQ_IS_FORKED: - *result = AP_MPMQ_STATIC; - return APR_SUCCESS; - case AP_MPMQ_HARD_LIMIT_DAEMONS: - *result = server_limit; - return APR_SUCCESS; - case AP_MPMQ_HARD_LIMIT_THREADS: - *result = thread_limit; - return APR_SUCCESS; - case AP_MPMQ_MAX_THREADS: - *result = max_threads; - return APR_SUCCESS; - case AP_MPMQ_MIN_SPARE_DAEMONS: - *result = 0; - return APR_SUCCESS; - case AP_MPMQ_MIN_SPARE_THREADS: - *result = min_spare_threads; - return APR_SUCCESS; - case AP_MPMQ_MAX_SPARE_DAEMONS: - *result = 0; - return APR_SUCCESS; - case AP_MPMQ_MAX_SPARE_THREADS: - *result = max_spare_threads; - return APR_SUCCESS; - case AP_MPMQ_MAX_REQUESTS_DAEMON: - *result = ap_max_requests_per_child; - return APR_SUCCESS; - case AP_MPMQ_MAX_DAEMONS: - *result = num_daemons; - return APR_SUCCESS; - } - return APR_ENOTIMPL; -} - -/* a clean exit from a child with proper cleanup */ -static void clean_child_exit(int code) -{ - if (pchild) { - apr_pool_destroy(pchild); - } - exit(code); -} - -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; -static int volatile child_fatal; -/* we don't currently track ap_my_generation, but mod_status - * references it so it must be defined */ -ap_generation_t volatile ap_my_generation=0; - -/* - * 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. - */ - -static 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 */ -static 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 == AP_SIG_GRACEFUL); -#else - ap_start_restart(1); -#endif -} - -static void set_signals(void) -{ -#ifndef NO_USE_SIGACTION - struct sigaction sa; -#endif - - if (!one_process) { - ap_fatal_signal_setup(ap_server_conf, pconf); - } - -#ifndef NO_USE_SIGACTION - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; - - sa.sa_handler = sig_term; - if (sigaction(SIGTERM, &sa, NULL) < 0) - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, - "sigaction(SIGTERM)"); -#ifdef SIGINT - if (sigaction(SIGINT, &sa, NULL) < 0) - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_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, errno, ap_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, errno, ap_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, errno, ap_server_conf, - "sigaction(SIGPIPE)"); -#endif - - /* we want to ignore HUPs and AP_SIG_GRACEFUL while we're busy - * processing one */ - sigaddset(&sa.sa_mask, SIGHUP); - sigaddset(&sa.sa_mask, AP_SIG_GRACEFUL); - sa.sa_handler = restart; - if (sigaction(SIGHUP, &sa, NULL) < 0) - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, - "sigaction(SIGHUP)"); - if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0) - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, - "sigaction(" AP_SIG_GRACEFUL_STRING ")"); -#else - if (!one_process) { -#ifdef SIGXCPU - apr_signal(SIGXCPU, SIG_DFL); -#endif /* SIGXCPU */ -#ifdef SIGXFSZ - apr_signal(SIGXFSZ, SIG_DFL); -#endif /* SIGXFSZ */ - } - - apr_signal(SIGTERM, sig_term); -#ifdef SIGHUP - apr_signal(SIGHUP, restart); -#endif /* SIGHUP */ -#ifdef AP_SIG_GRACEFUL - apr_signal(AP_SIG_GRACEFUL, restart); -#endif /* AP_SIG_GRACEFUL */ -#ifdef SIGPIPE - apr_signal(SIGPIPE, SIG_IGN); -#endif /* SIGPIPE */ - -#endif -} - -/***************************************************************** - * Here follows a long bunch of generic server bookkeeping stuff... - */ - -int ap_graceful_stop_signalled(void) -{ - /* XXX - Does this really work? - Manoj */ - return is_graceful; -} - -/***************************************************************** - * Child process main loop. - */ - -static void process_socket(apr_pool_t *p, apr_socket_t *sock, long conn_id, - apr_bucket_alloc_t *bucket_alloc) -{ - conn_rec *current_conn; - int csd; - apr_status_t rv; - int thread_num = conn_id % thread_limit; - ap_sb_handle_t *sbh; - - if ((rv = apr_os_sock_get(&csd, sock)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, "apr_os_sock_get"); - } - - if (thread_socket_table[thread_num] < 0) { - ap_sock_disable_nagle(sock); - } - - ap_create_sb_handle(&sbh, p, conn_id / thread_limit, thread_num); - current_conn = ap_run_create_connection(p, ap_server_conf, sock, conn_id, - sbh, bucket_alloc); - if (current_conn) { - ap_process_connection(current_conn, sock); - ap_lingering_close(current_conn); - } -} - -static int perchild_process_connection(conn_rec *c) -{ - ap_filter_t *f; - apr_bucket_brigade *bb; - core_net_rec *net; - - apr_pool_userdata_get((void **)&bb, "PERCHILD_SOCKETS", c->pool); - if (bb != NULL) { - for (f = c->output_filters; f != NULL; f = f->next) { - if (!strcmp(f->frec->name, "core")) { - break; - } - } - if (f != NULL) { - net = f->ctx; - net->in_ctx = apr_palloc(c->pool, sizeof(*net->in_ctx)); - net->in_ctx->b = bb; - } - } - return DECLINED; -} - - -static void *worker_thread(apr_thread_t *, void *); - -/* Starts a thread as long as we're below max_threads */ -static int start_thread(void) -{ - apr_thread_t *thread; - int rc; - - apr_thread_mutex_lock(worker_thread_count_mutex); - if (worker_thread_count < max_threads - 1) { - rc = apr_thread_create(&thread, worker_thread_attr, worker_thread, - &worker_thread_free_ids[worker_thread_count], pchild); - if (rc != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ALERT, rc, ap_server_conf, - "apr_thread_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); - workers_may_exit = 1; - apr_thread_mutex_unlock(worker_thread_count_mutex); - return 0; - } - else { - worker_thread_count++; - } - } - else { - static int reported = 0; - - if (!reported) { - ap_log_error(APLOG_MARK, APLOG_ERR, 0, - ap_server_conf, - "server reached MaxThreadsPerChild setting, " - "consider raising the MaxThreadsPerChild or " - "NumServers settings"); - reported = 1; - } - apr_thread_mutex_unlock(worker_thread_count_mutex); - return 0; - } - apr_thread_mutex_unlock(worker_thread_count_mutex); - return 1; - -} - -/* Sets workers_may_exit if we received a character on the pipe_of_death */ -static apr_status_t check_pipe_of_death(void **csd, ap_listen_rec *lr, - apr_pool_t *ptrans) -{ - apr_thread_mutex_lock(pipe_of_death_mutex); - if (!workers_may_exit) { - int ret; - char pipe_read_char; - apr_size_t n = 1; - - ret = apr_recv(lr->sd, &pipe_read_char, &n); - if (APR_STATUS_IS_EAGAIN(ret)) { - /* It lost the lottery. It must continue to suffer - * through a life of servitude. */ - } - else { - /* It won the lottery (or something else is very - * wrong). Embrace death with open arms. */ - workers_may_exit = 1; - } - } - apr_thread_mutex_unlock(pipe_of_death_mutex); - return APR_SUCCESS; -} - -static apr_status_t receive_from_other_child(void **csd, ap_listen_rec *lr, - apr_pool_t *ptrans) -{ - struct msghdr msg; - struct cmsghdr *cmsg; - char buffer[HUGE_STRING_LEN * 2], *headers, *body; - int headerslen, bodylen; - struct iovec iov; - int ret, dp; - apr_os_sock_t sd; - apr_bucket_alloc_t *alloc = apr_bucket_alloc_create(ptrans); - apr_bucket_brigade *bb = apr_brigade_create(ptrans, alloc); - apr_bucket *bucket; - - apr_os_sock_get(&sd, lr->sd); - - iov.iov_base = buffer; - iov.iov_len = sizeof(buffer); - - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - - cmsg = apr_palloc(ptrans, sizeof(*cmsg) + sizeof(sd)); - cmsg->cmsg_len = sizeof(*cmsg) + sizeof(sd); - msg.msg_control = cmsg; - msg.msg_controllen = cmsg->cmsg_len; - - ret = recvmsg(sd, &msg, 0); - - memcpy(&dp, CMSG_DATA(cmsg), sizeof(dp)); - - *csd = NULL; /* tell apr_os_sock_put() to allocate new apr_socket_t */ - apr_os_sock_put((apr_socket_t **)csd, &dp, ptrans); - - bucket = apr_bucket_eos_create(alloc); - APR_BRIGADE_INSERT_HEAD(bb, bucket); - bucket = apr_bucket_socket_create(*csd, alloc); - APR_BRIGADE_INSERT_HEAD(bb, bucket); - - body = strchr(iov.iov_base, 0); - if (!body) { - return 1; - } - - body++; - bodylen = strlen(body); - - headers = iov.iov_base; - headerslen = body - headers; - - bucket = apr_bucket_heap_create(body, bodylen, NULL, alloc); - APR_BRIGADE_INSERT_HEAD(bb, bucket); - bucket = apr_bucket_heap_create(headers, headerslen, NULL, alloc); - APR_BRIGADE_INSERT_HEAD(bb, bucket); - - apr_pool_userdata_set(bb, "PERCHILD_SOCKETS", NULL, ptrans); - - return 0; -} - -/* idle_thread_count should be incremented before starting a worker_thread */ - -static void *worker_thread(apr_thread_t *thd, void *arg) -{ - void *csd; - apr_pool_t *tpool; /* Pool for this thread */ - apr_pool_t *ptrans; /* Pool for per-transaction stuff */ - volatile int thread_just_started = 1; - int srv; - int thread_num = *((int *) arg); - long conn_id = child_num * thread_limit + thread_num; - apr_pollfd_t *pollset; - apr_status_t rv; - ap_listen_rec *lr, *last_lr = ap_listeners; - int n; - apr_bucket_alloc_t *bucket_alloc; - - apr_thread_mutex_lock(thread_pool_parent_mutex); - apr_pool_create(&tpool, thread_pool_parent); - apr_thread_mutex_unlock(thread_pool_parent_mutex); - apr_pool_create(&ptrans, tpool); - - (void) ap_update_child_status_from_indexes(child_num, thread_num, - SERVER_STARTING, - (request_rec *) NULL); - - bucket_alloc = apr_bucket_alloc_create(apr_thread_pool_get(thd)); - - apr_poll_setup(&pollset, num_listensocks, tpool); - for(lr = ap_listeners; lr != NULL; lr = lr->next) { - int fd; - apr_poll_socket_add(pollset, lr->sd, APR_POLLIN); - - apr_os_sock_get(&fd, lr->sd); - } - - while (!workers_may_exit) { - workers_may_exit |= ((ap_max_requests_per_child != 0) - && (requests_this_child <= 0)); - if (workers_may_exit) break; - if (!thread_just_started) { - apr_thread_mutex_lock(idle_thread_count_mutex); - if (idle_thread_count < max_spare_threads) { - idle_thread_count++; - apr_thread_mutex_unlock(idle_thread_count_mutex); - } - else { - apr_thread_mutex_unlock(idle_thread_count_mutex); - break; - } - } - else { - thread_just_started = 0; - } - - (void) ap_update_child_status_from_indexes(child_num, thread_num, - SERVER_READY, - (request_rec *) NULL); - - apr_thread_mutex_lock(thread_accept_mutex); - if (workers_may_exit) { - apr_thread_mutex_unlock(thread_accept_mutex); - break; - } - if ((rv = SAFE_ACCEPT(apr_proc_mutex_lock(process_accept_mutex))) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "apr_proc_mutex_lock failed. Attempting to shutdown " - "process gracefully."); - workers_may_exit = 1; - } - - while (!workers_may_exit) { - apr_int16_t event; - srv = apr_poll(pollset, num_listensocks, &n, -1); - - if (srv != APR_SUCCESS) { - if (APR_STATUS_IS_EINTR(srv)) { - continue; - } - - /* apr_poll() will only return errors in catastrophic - * circumstances. Let's try exiting gracefully, for now. */ - ap_log_error(APLOG_MARK, APLOG_ERR, srv, (const server_rec *) - ap_server_conf, "apr_poll: (listen)"); - workers_may_exit = 1; - } - if (workers_may_exit) break; - - /* find a listener */ - lr = last_lr; - do { - lr = lr->next; - if (lr == NULL) { - lr = ap_listeners; - } - /* XXX: Should we check for POLLERR? */ - apr_poll_revents_get(&event, lr->sd, pollset); - if (event & (APR_POLLIN)) { - last_lr = lr; - goto got_fd; - } - } while (lr != last_lr); - } - got_fd: - if (!workers_may_exit) { - rv = lr->accept_func(&csd, lr, ptrans); - if (rv == APR_EGENERAL) { - /* E[NM]FILE, ENOMEM, etc */ - workers_may_exit = 1; - } - if ((rv = SAFE_ACCEPT(apr_proc_mutex_unlock(process_accept_mutex))) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "apr_proc_mutex_unlock failed. Attempting to shutdown " - "process gracefully."); - workers_may_exit = 1; - } - apr_thread_mutex_unlock(thread_accept_mutex); - apr_thread_mutex_lock(idle_thread_count_mutex); - if (idle_thread_count > min_spare_threads) { - idle_thread_count--; - } - else { - if (!start_thread()) { - idle_thread_count--; - } - } - apr_thread_mutex_unlock(idle_thread_count_mutex); - if (setjmp(jmpbuffer) != 1) { - process_socket(ptrans, csd, conn_id, bucket_alloc); - } - else { - thread_socket_table[thread_num] = AP_PERCHILD_THISCHILD; - } - requests_this_child--; - } - else { - if ((rv = SAFE_ACCEPT(apr_proc_mutex_unlock(process_accept_mutex))) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "apr_proc_mutex_unlock failed. Attempting to shutdown " - "process gracefully."); - workers_may_exit = 1; - } - apr_thread_mutex_unlock(thread_accept_mutex); - apr_thread_mutex_lock(idle_thread_count_mutex); - idle_thread_count--; - apr_thread_mutex_unlock(idle_thread_count_mutex); - break; - } - apr_pool_clear(ptrans); - } - - apr_thread_mutex_lock(thread_pool_parent_mutex); - ap_update_child_status_from_indexes(child_num, thread_num, SERVER_DEAD, - (request_rec *) NULL); - apr_pool_destroy(tpool); - apr_thread_mutex_unlock(thread_pool_parent_mutex); - apr_thread_mutex_lock(worker_thread_count_mutex); - worker_thread_count--; - worker_thread_free_ids[worker_thread_count] = thread_num; - if (worker_thread_count == 0) { - /* All the threads have exited, now finish the shutdown process - * by signalling the sigwait thread */ - kill(my_pid, SIGTERM); - } - apr_thread_mutex_unlock(worker_thread_count_mutex); - - apr_bucket_alloc_destroy(bucket_alloc); - - return NULL; -} - - - -/* Set group privileges. - * - * Note that we use the username as set in the config files, rather than - * the lookup of to uid --- the same uid may have multiple passwd entries, - * with different sets of groups for each. - */ - -static int set_group_privs(uid_t uid, gid_t gid) -{ - if (!geteuid()) { - const char *name; - - /* Get username if passed as a uid */ - - struct passwd *ent; - - if ((ent = getpwuid(uid)) == NULL) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "getpwuid: couldn't determine user name from uid %u, " - "you probably need to modify the User directive", - (unsigned)uid); - return -1; - } - - name = ent->pw_name; - - /* - * Set the GID before initgroups(), since on some platforms - * setgid() is known to zap the group list. - */ - if (setgid(gid) == -1) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setgid: unable to set group id to Group %u", - (unsigned)gid); - return -1; - } - - /* Reset `groups' attributes. */ - - if (initgroups(name, gid) == -1) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "initgroups: unable to set groups for User %s " - "and Group %u", name, (unsigned)gid); - return -1; - } - } - return 0; -} - - -static int perchild_setup_child(int childnum) -{ - child_info_t *ug = &child_info_table[childnum]; - - if (ug->uid == -1 && ug->gid == -1) { - return unixd_setup_child(); - } - if (set_group_privs(ug->uid, ug->gid)) { - return -1; - } - /* Only try to switch if we're running as root */ - if (!geteuid() - && ( -#ifdef _OSD_POSIX - os_init_job_environment(server_conf, unixd_config.user_name, - one_process) != 0 || -#endif - setuid(ug->uid) == -1)) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setuid: unable to change to uid: %ld", - (long) ug->uid); - return -1; - } - return 0; -} - -static int check_signal(int signum) -{ - switch (signum) { - case SIGTERM: - case SIGINT: - just_die(signum); - return 1; - } - return 0; -} - -typedef struct perchild_header { - char *headers; - apr_pool_t *p; -} perchild_header; - -/* Send a single HTTP header field to the client. Note that this function - * is used in calls to table_do(), so their interfaces are co-dependent. - * In other words, don't change this one without checking table_do in alloc.c. - * It returns true unless there was a write error of some kind. - */ -static int perchild_header_field(perchild_header *h, - const char *fieldname, const char *fieldval) -{ - apr_pstrcat(h->p, h->headers, fieldname, ": ", fieldval, CRLF, NULL); - return 1; -} - - -static void child_main(int child_num_arg) -{ - int i; - apr_status_t rv; - apr_socket_t *sock = NULL; - ap_listen_rec *lr; - - my_pid = getpid(); - ap_fatal_signal_child_setup(ap_server_conf); - child_num = child_num_arg; - apr_pool_create(&pchild, pconf); - - for (lr = ap_listeners ; lr->next != NULL; lr = lr->next) { - continue; - } - - apr_os_sock_put(&sock, &child_info_table[child_num].input, pconf); - lr->next = apr_palloc(pconf, sizeof(*lr)); - lr->next->sd = sock; - lr->next->active = 1; - lr->next->accept_func = receive_from_other_child; - lr->next->next = NULL; - lr = lr->next; - num_listensocks++; - - /*stuff to do before we switch id's, so we have permissions.*/ - - rv = SAFE_ACCEPT(apr_proc_mutex_child_init(&process_accept_mutex, - ap_lock_fname, pchild)); - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "Couldn't initialize cross-process lock in child"); - clean_child_exit(APEXIT_CHILDFATAL); - } - - if (perchild_setup_child(child_num)) { - clean_child_exit(APEXIT_CHILDFATAL); - } - - ap_run_child_init(pchild, ap_server_conf); - - /*done with init critical section */ - - apr_setup_signal_thread(); - - requests_this_child = ap_max_requests_per_child; - - - /* Setup worker threads */ - - if (threads_to_start > max_threads) { - threads_to_start = max_threads; - } - idle_thread_count = threads_to_start; - worker_thread_count = 0; - worker_thread_free_ids = (int *)apr_pcalloc(pchild, thread_limit * sizeof(int)); - for (i = 0; i < max_threads; i++) { - worker_thread_free_ids[i] = i; - } - apr_pool_create(&thread_pool_parent, pchild); - apr_thread_mutex_create(&thread_pool_parent_mutex, - APR_THREAD_MUTEX_DEFAULT, pchild); - apr_thread_mutex_create(&idle_thread_count_mutex, - APR_THREAD_MUTEX_DEFAULT, pchild); - apr_thread_mutex_create(&worker_thread_count_mutex, - APR_THREAD_MUTEX_DEFAULT, pchild); - apr_thread_mutex_create(&pipe_of_death_mutex, - APR_THREAD_MUTEX_DEFAULT, pchild); - apr_thread_mutex_create(&thread_accept_mutex, - APR_THREAD_MUTEX_DEFAULT, pchild); - - apr_threadattr_create(&worker_thread_attr, pchild); - apr_threadattr_detach_set(worker_thread_attr, 1); - - /* We are creating worker threads right now */ - for (i=0; i < threads_to_start; i++) { - /* start_thread shouldn't fail here */ - if (!start_thread()) { - break; - } - } - - apr_signal_thread(check_signal); -} - -static int make_child(server_rec *s, int slot) -{ - int pid; - - if (slot + 1 > ap_max_daemons_limit) { - ap_max_daemons_limit = slot + 1; - } - - if (one_process) { - set_signals(); - ap_child_table[slot].pid = getpid(); - ap_child_table[slot].status = SERVER_ALIVE; - child_main(slot); - } - (void) ap_update_child_status_from_indexes(slot, 0, SERVER_STARTING, - (request_rec *) NULL); - - if ((pid = fork()) == -1) { - ap_log_error(APLOG_MARK, APLOG_ERR, errno, 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 HAVE_BINDPROCESSOR - /* By default, AIX binds to a single processor. This bit unbinds - * children which will then bind to another CPU. - */ - int status = bindprocessor(BINDPROCESS, (int)getpid(), - PROCESSOR_CLASS_ANY); - if (status != OK) { - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, - ap_server_conf, "processor unbind failed %d", status); - } -#endif - - RAISE_SIGSTOP(MAKE_CHILD); - - /* XXX - For an unthreaded server, a signal handler will be necessary - * apr_signal(SIGTERM, just_die); - */ - child_main(slot); - clean_child_exit(0); - } - /* else */ - ap_child_table[slot].pid = pid; - ap_child_table[slot].status = SERVER_ALIVE; - - return 0; -} - -/* start up a bunch of children */ -static int startup_children(int number_to_start) -{ - int i; - - for (i = 0; number_to_start && i < num_daemons; ++i) { - if (ap_child_table[i].pid) { - continue; - } - if (make_child(ap_server_conf, i) < 0) { - break; - } - --number_to_start; - } - return number_to_start; -} - - -/* - * spawn_rate is the number of children that will be spawned on the - * next maintenance cycle if there aren't enough servers. It is - * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by - * without the need to spawn. - */ -static int spawn_rate = 1; -#ifndef MAX_SPAWN_RATE -#define MAX_SPAWN_RATE (32) -#endif -static int hold_off_on_exponential_spawning; - -static void perform_child_maintenance(void) -{ - int i; - int free_length; - int free_slots[MAX_SPAWN_RATE]; - int last_non_dead = -1; - - /* initialize the free_list */ - free_length = 0; - - for (i = 0; i < num_daemons; ++i) { - if (ap_child_table[i].pid == 0) { - if (free_length < spawn_rate) { - free_slots[free_length] = i; - ++free_length; - } - } - else { - last_non_dead = i; - } - - if (i >= ap_max_daemons_limit && free_length >= spawn_rate) { - break; - } - } - ap_max_daemons_limit = last_non_dead + 1; - - if (free_length > 0) { - for (i = 0; i < free_length; ++i) { - make_child(ap_server_conf, free_slots[i]); - } - /* the next time around we want to spawn twice as many if this - * wasn't good enough, but not if we've just done a graceful - */ - if (hold_off_on_exponential_spawning) { - --hold_off_on_exponential_spawning; - } - else if (spawn_rate < MAX_SPAWN_RATE) { - spawn_rate *= 2; - } - } - else { - spawn_rate = 1; - } -} - -static void server_main_loop(int remaining_children_to_start) -{ - int child_slot; - apr_exit_why_e exitwhy; - int status; - apr_proc_t pid; - int i; - - while (!restart_pending && !shutdown_pending) { - ap_wait_or_timeout(&exitwhy, &status, &pid, pconf); - - if (pid.pid != -1) { - if (ap_process_child_status(&pid, exitwhy, status) - == APEXIT_CHILDFATAL) { - shutdown_pending = 1; - child_fatal = 1; - return; - } - /* non-fatal death... note that it's gone in the child table and - * clean out the status table. */ - child_slot = -1; - for (i = 0; i < ap_max_daemons_limit; ++i) { - if (ap_child_table[i].pid == pid.pid) { - child_slot = i; - break; - } - } - if (child_slot >= 0) { - ap_child_table[child_slot].pid = 0; - ap_update_child_status_from_indexes(child_slot, i, SERVER_DEAD, - (request_rec *) NULL); - - - if (remaining_children_to_start - && child_slot < num_daemons) { - /* we're still doing a 1-for-1 replacement of dead - * children with new children - */ - make_child(ap_server_conf, child_slot); - --remaining_children_to_start; - } -#if APR_HAS_OTHER_CHILD - } - else if (apr_proc_other_child_read(&pid, status) == 0) { - /* handled */ -#endif - } - else if (is_graceful) { - /* Great, we've probably just lost a slot in the - * child table. Somehow we don't know about this - * child. - */ - ap_log_error(APLOG_MARK, APLOG_WARNING, 0, - ap_server_conf, - "long lost child came home! (pid %ld)", - (long)pid.pid); - } - /* Don't perform idle maintenance when a child dies, - * only do it when there's a timeout. Remember only a - * finite number of children can die, and it's pretty - * pathological for a lot to die suddenly. - */ - continue; - } - else if (remaining_children_to_start) { - /* we hit a 1 second timeout in which none of the previous - * generation of children needed to be reaped... so assume - * they're all done, and pick up the slack if any is left. - */ - remaining_children_to_start = \ - startup_children(remaining_children_to_start); - /* 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_child_maintenance(); - } -} - -int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s) -{ - int remaining_children_to_start; - int i; - apr_status_t rv; - apr_size_t one = 1; - ap_listen_rec *lr; - apr_socket_t *sock = NULL; - int fd; - - ap_log_pid(pconf, ap_pid_fname); - - first_server_limit = server_limit; - first_thread_limit = thread_limit; - if (changed_limit_at_restart) { - ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, - "WARNING: Attempt to change ServerLimit or ThreadLimit " - "ignored during restart"); - changed_limit_at_restart = 0; - } - - ap_server_conf = s; - - if ((ap_accept_lock_mech == APR_LOCK_SYSVSEM) || - (ap_accept_lock_mech == APR_LOCK_POSIXSEM)) { - ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, - "Server configured for an accept lock mechanism that " - "cannot be used with perchild. Falling back to FCNTL."); - ap_accept_lock_mech = APR_LOCK_FCNTL; - } - - /* Initialize cross-process accept lock */ - ap_lock_fname = apr_psprintf(_pconf, "%s.%u", - ap_server_root_relative(_pconf, ap_lock_fname), - my_pid); - rv = SAFE_ACCEPT(apr_proc_mutex_create(&process_accept_mutex, - ap_lock_fname, ap_accept_lock_mech, - _pconf)); - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, - "Couldn't create cross-process lock"); - return 1; - } - - if (!is_graceful) { - if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) { - return 1; - } - } - /* Initialize the child table */ - if (!is_graceful) { - for (i = 0; i < server_limit; i++) { - ap_child_table[i].pid = 0; - } - } - - /* We need to put the new listeners at the end of the ap_listeners - * list. If we don't, then the pool will be cleared before the - * open_logs phase is called for the second time, and ap_listeners - * will have only invalid data. If that happens, then the sockets - * that we opened using make_sock() will be lost, and the server - * won't start. - */ - for (lr = ap_listeners ; lr->next != NULL; lr = lr->next) { - continue; - } - - apr_os_file_get(&fd, pipe_of_death_in); - apr_os_sock_put(&sock, &fd, pconf); - lr->next = apr_palloc(pconf, sizeof(*lr)); - lr->next->sd = sock; - lr->next->active = 1; - lr->next->accept_func = check_pipe_of_death; - lr->next->next = NULL; - lr = lr->next; - num_listensocks++; - - set_signals(); - - /* If we're doing a graceful_restart then we're going to see a lot - * of children exiting immediately when we get into the main loop - * below (because we just sent them AP_SIG_GRACEFUL). This happens - * pretty rapidly... and for each one that exits we'll start a new one - * until we reach at least daemons_min_free. But we may be permitted to - * start more than that, so we'll just keep track of how many we're - * supposed to start up without the 1 second penalty between each fork. - */ - remaining_children_to_start = num_daemons; - if (!is_graceful) { - remaining_children_to_start = \ - startup_children(remaining_children_to_start); - } - 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_NOTICE, 0, ap_server_conf, - "%s configured -- resuming normal operations", - ap_get_server_version()); - ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, - "Server built: %s", ap_get_server_built()); -#ifdef AP_MPM_WANT_SET_ACCEPT_LOCK_MECH - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "AcceptMutex: %s (default: %s)", - apr_proc_mutex_name(process_accept_mutex), - apr_proc_mutex_defname()); -#endif - 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 (unixd_killpg(getpgrp(), SIGTERM) < 0) { - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, - "killpg SIGTERM"); - } - ap_reclaim_child_processes(1); /* Start with SIGTERM */ - - if (!child_fatal) { - /* 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_INFO, 0, - ap_server_conf, - "removed PID file %s (pid=%ld)", - pidfile, (long)getpid()); - } - - ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, - ap_server_conf, "caught SIGTERM, shutting down"); - } - return 1; - } - - /* we've been told to restart */ - apr_signal(SIGHUP, SIG_IGN); - - if (one_process) { - /* not worth thinking about */ - return 1; - } - - if (is_graceful) { - char char_of_death = '!'; - - ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, - ap_server_conf, AP_SIG_GRACEFUL_STRING " received. " - "Doing graceful restart"); - - /* This is mostly for debugging... so that we know what is still - * gracefully dealing with existing request. - */ - - for (i = 0; i < num_daemons; ++i) { - if (ap_child_table[i].pid) { - ap_child_table[i].status = SERVER_DYING; - } - } - /* give the children the signal to die */ - for (i = 0; i < num_daemons;) { - if ((rv = apr_file_write(pipe_of_death_out, &char_of_death, - &one)) != APR_SUCCESS) { - if (APR_STATUS_IS_EINTR(rv)) continue; - ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, - "write pipe_of_death"); - } - i++; - } - } - 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 (unixd_killpg(getpgrp(), SIGTERM) < 0) { - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, - "killpg SIGTERM"); - } - ap_reclaim_child_processes(1); /* Start with SIGTERM */ - ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, - ap_server_conf, "SIGHUP received. Attempting to restart"); - } - return 0; -} - -/* This really should be a post_config hook, but the error log is already - * redirected by that point, so we need to do this in the open_logs phase. - */ -static int perchild_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s) -{ - apr_status_t rv; - - pconf = p; - ap_server_conf = s; - - if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) { - ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_STARTUP, 0, - NULL, "no listening sockets available, shutting down"); - return DONE; - } - - ap_log_pid(pconf, ap_pid_fname); - - if ((rv = ap_mpm_pod_open(pconf, &pod))) { - ap_log_error(APLOG_MARK, APLOG_CRIT|APLOG_STARTUP, rv, NULL, - "Could not open pipe-of-death."); - return DONE; - } - - if ((rv = apr_file_pipe_create(&pipe_of_death_in, &pipe_of_death_out, - pconf)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, - (const server_rec*) ap_server_conf, - "apr_file_pipe_create (pipe_of_death)"); - exit(1); - } - if ((rv = apr_file_pipe_timeout_set(pipe_of_death_in, 0)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, - (const server_rec*) ap_server_conf, - "apr_file_pipe_timeout_set (pipe_of_death)"); - exit(1); - } - - return OK; -} - -static int perchild_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp) -{ - static int restart_num = 0; - int no_detach, debug, foreground; - ap_directive_t *pdir; - int i; - int tmp_server_limit = DEFAULT_SERVER_LIMIT; - int tmp_thread_limit = DEFAULT_THREAD_LIMIT; - apr_status_t rv; - - debug = ap_exists_config_define("DEBUG"); - - if (debug) { - foreground = one_process = 1; - no_detach = 0; - } - else { - one_process = ap_exists_config_define("ONE_PROCESS"); - no_detach = ap_exists_config_define("NO_DETACH"); - foreground = ap_exists_config_define("FOREGROUND"); - } - - /* sigh, want this only the second time around */ - if (restart_num++ == 1) { - is_graceful = 0; - - if (!one_process && !foreground) { - rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND - : APR_PROC_DETACH_DAEMONIZE); - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, - "apr_proc_detach failed"); - return HTTP_INTERNAL_SERVER_ERROR; - } - } - - my_pid = getpid(); - } - - unixd_pre_config(ptemp); - ap_listen_pre_config(); - num_daemons = DEFAULT_NUM_DAEMON; - threads_to_start = DEFAULT_START_THREAD; - min_spare_threads = DEFAULT_MIN_SPARE_THREAD; - max_spare_threads = DEFAULT_MAX_SPARE_THREAD; - max_threads = thread_limit; - ap_pid_fname = DEFAULT_PIDLOG; - ap_lock_fname = DEFAULT_LOCKFILE; - ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD; - curr_child_num = 0; -#ifdef AP_MPM_WANT_SET_MAX_MEM_FREE - ap_max_mem_free = APR_ALLOCATOR_MAX_FREE_UNLIMITED; -#endif - - apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir)); - - /* we need to know ServerLimit and ThreadLimit before we start processing - * the tree because we need to already have allocated child_info_table - */ - for (pdir = ap_conftree; pdir != NULL; pdir = pdir->next) { - if (!strcasecmp(pdir->directive, "ServerLimit")) { - if (atoi(pdir->args) > tmp_server_limit) { - tmp_server_limit = atoi(pdir->args); - if (tmp_server_limit > MAX_SERVER_LIMIT) { - tmp_server_limit = MAX_SERVER_LIMIT; - } - } - } - else if (!strcasecmp(pdir->directive, "ThreadLimit")) { - if (atoi(pdir->args) > tmp_thread_limit) { - tmp_thread_limit = atoi(pdir->args); - if (tmp_thread_limit > MAX_THREAD_LIMIT) { - tmp_thread_limit = MAX_THREAD_LIMIT; - } - } - } - } - - child_info_table = (child_info_t *)apr_pcalloc(p, tmp_server_limit * sizeof(child_info_t)); - for (i = 0; i < tmp_server_limit; i++) { - child_info_table[i].uid = -1; - child_info_table[i].gid = -1; - child_info_table[i].input = -1; - child_info_table[i].output = -1; - } - - return OK; -} - -static int pass_request(request_rec *r) -{ - int rv; - apr_socket_t *thesock = ap_get_module_config(r->connection->conn_config, &core_module); - struct msghdr msg; - struct cmsghdr *cmsg; - int sfd; - struct iovec iov[2]; - conn_rec *c = r->connection; - apr_bucket_brigade *bb = apr_brigade_create(r->pool, c->bucket_alloc); - apr_bucket_brigade *sockbb; - char request_body[HUGE_STRING_LEN] = "\0"; - apr_size_t l = sizeof(request_body); - perchild_header h; - apr_bucket *sockbuck; - perchild_server_conf *sconf = (perchild_server_conf *) - ap_get_module_config(r->server->module_config, - &mpm_perchild_module); - - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "passing request to another child. Vhost: %s, child %d %d", - apr_table_get(r->headers_in, "Host"), child_num, sconf->output); - ap_get_brigade(r->connection->input_filters, bb, AP_MODE_EXHAUSTIVE, APR_NONBLOCK_READ, - 0); - - for (sockbuck = APR_BRIGADE_FIRST(bb); sockbuck != APR_BRIGADE_SENTINEL(bb); - sockbuck = APR_BUCKET_NEXT(sockbuck)) { - if (APR_BUCKET_IS_SOCKET(sockbuck)) { - break; - } - } - - if (!sockbuck) { - } - sockbb = apr_brigade_split(bb, sockbuck); - - if (apr_brigade_flatten(bb, request_body, &l) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "Unable to flatten brigade, declining request"); - return DECLINED; - } - - apr_os_sock_get(&sfd, thesock); - - h.p = r->pool; - h.headers = apr_pstrcat(h.p, r->the_request, CRLF, "Host: ", r->hostname, - CRLF, NULL); - apr_table_do((int (*) (void *, const char *, const char *)) - perchild_header_field, (void *) &h, r->headers_in, NULL); - h.headers = apr_pstrcat(h.p, h.headers, CRLF, NULL); - - iov[0].iov_base = h.headers; - iov[0].iov_len = strlen(h.headers) + 1; - iov[1].iov_base = request_body; - iov[1].iov_len = l + 1; - - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_iov = iov; - msg.msg_iovlen = 2; - - cmsg = apr_palloc(r->pool, sizeof(*cmsg) + sizeof(sfd)); - cmsg->cmsg_len = sizeof(*cmsg) + sizeof(sfd); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - - memcpy(CMSG_DATA(cmsg), &sfd, sizeof(sfd)); - - msg.msg_control = cmsg; - msg.msg_controllen = cmsg->cmsg_len; - - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "Writing message to %d, passing sd: %d", sconf->output, sfd); - - if ((rv = sendmsg(sconf->output, &msg, 0)) == -1) { - apr_pool_destroy(r->pool); - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "Writing message failed %d %d", rv, errno); - return -1; - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "Writing message succeeded %d", rv); - - apr_pool_destroy(r->pool); - return 1; -} - -static char *make_perchild_socket(const char *fullsockname, int sd[2]) -{ - socketpair(PF_UNIX, SOCK_STREAM, 0, sd); - return NULL; -} - -static int perchild_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s) -{ - int i; - server_rec *sr; - perchild_server_conf *sconf; - int def_sd[2]; - - def_sd[0] = -1; - def_sd[1] = -1; - - for (sr = s; sr; sr = sr->next) { - sconf = (perchild_server_conf *)ap_get_module_config(sr->module_config, - &mpm_perchild_module); - - if (sconf->input == -1) { - sconf->fullsockname = apr_pstrcat(sr->process->pool, - sconf->sockname, ".DEFAULT", NULL); - if (def_sd[0] == -1) { - if (!make_perchild_socket(sconf->fullsockname, def_sd)) { - /* log error */ - } - } - sconf->input = def_sd[0]; - sconf->output = def_sd[1]; - } - } - - for (i = 0; i < num_daemons; i++) { - if (child_info_table[i].uid == -1) { - child_info_table[i].input = def_sd[0]; - child_info_table[i].output = def_sd[1]; - } - } - - thread_socket_table = (int *)apr_pcalloc(p, thread_limit * sizeof(int)); - for (i = 0; i < thread_limit; i++) { - thread_socket_table[i] = AP_PERCHILD_THISCHILD; - } - ap_child_table = (ap_ctable *)apr_pcalloc(p, server_limit * sizeof(ap_ctable)); - - return OK; -} - -static int perchild_post_read(request_rec *r) -{ - int thread_num = r->connection->id % thread_limit; - perchild_server_conf *sconf = (perchild_server_conf *) - ap_get_module_config(r->server->module_config, - &mpm_perchild_module); - - if (thread_socket_table[thread_num] != AP_PERCHILD_THISCHILD) { - apr_socket_t *csd = NULL; - - apr_os_sock_put(&csd, &thread_socket_table[thread_num], - r->connection->pool); - ap_sock_disable_nagle(csd); - ap_set_module_config(r->connection->conn_config, &core_module, csd); - return OK; - } - else { - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "Determining if request should be passed. " - "Child Num: %d, SD: %d, sd from table: %d, hostname from server: %s", child_num, - sconf->input, child_info_table[child_num].input, - r->server->server_hostname); - /* sconf is the server config for this vhost, so if our socket - * is not the same that was set in the config, then the request - * needs to be passed to another child. */ - if (sconf->input != child_info_table[child_num].input) { - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, - "Passing request."); - if (pass_request(r) == -1) { - ap_log_error(APLOG_MARK, APLOG_ERR, 0, - ap_server_conf, "Could not pass request to proper " - "child, request will not be honored."); - } - longjmp(jmpbuffer, 1); - } - return OK; - } - return OK; -} - -static void perchild_hooks(apr_pool_t *p) -{ - /* The perchild open_logs phase must run before the core's, or stderr - * will be redirected to a file, and the messages won't print to the - * console. - */ - static const char *const aszSucc[] = {"core.c", NULL}; - one_process = 0; - - ap_hook_open_logs(perchild_open_logs, NULL, aszSucc, APR_HOOK_MIDDLE); - ap_hook_pre_config(perchild_pre_config, NULL, NULL, APR_HOOK_MIDDLE); - ap_hook_post_config(perchild_post_config, NULL, NULL, APR_HOOK_MIDDLE); - - /* Both of these must be run absolutely first. If this request isn't for - * this server then we need to forward it to the proper child. No sense - * tying up this server running more post_read request hooks if it is - * just going to be forwarded along. The process_connection hook allows - * perchild to receive the passed request correctly, by automatically - * filling in the core_input_filter's ctx pointer. - */ - ap_hook_post_read_request(perchild_post_read, NULL, NULL, - APR_HOOK_REALLY_FIRST); - ap_hook_process_connection(perchild_process_connection, NULL, NULL, - APR_HOOK_REALLY_FIRST); -} - -static const char *set_num_daemons(cmd_parms *cmd, void *dummy, - const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - num_daemons = atoi(arg); - if (num_daemons > server_limit) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: NumServers of %d exceeds ServerLimit value " - "of %d servers,", num_daemons, server_limit); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - " lowering NumServers to %d. To increase, please " - "see the", server_limit); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - " ServerLimit directive."); - num_daemons = server_limit; - } - else if (num_daemons < 1) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: Require NumServers > 0, setting to 1"); - num_daemons = 1; - } - return NULL; -} - -static const char *set_threads_to_start(cmd_parms *cmd, void *dummy, - const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - threads_to_start = atoi(arg); - if (threads_to_start > thread_limit) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: StartThreads of %d exceeds ThreadLimit value" - " of %d threads,", threads_to_start, - thread_limit); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - " lowering StartThreads to %d. To increase, please" - " see the", thread_limit); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - " ThreadLimit directive."); - } - else if (threads_to_start < 1) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: Require StartThreads > 0, setting to 1"); - threads_to_start = 1; - } - return NULL; -} - -static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy, - const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - min_spare_threads = atoi(arg); - if (min_spare_threads <= 0) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: detected MinSpareThreads set to non-positive."); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "Resetting to 1 to avoid almost certain Apache failure."); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "Please read the documentation."); - min_spare_threads = 1; - } - - return NULL; -} - -static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy, - const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - max_spare_threads = atoi(arg); - if (max_spare_threads >= thread_limit) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: detected MinSpareThreads set higher than"); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "ThreadLimit. Resetting to %d", thread_limit); - max_spare_threads = thread_limit; - } - return NULL; -} - -static const char *set_max_threads(cmd_parms *cmd, void *dummy, const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - max_threads = atoi(arg); - if (max_threads > thread_limit) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: detected MaxThreadsPerChild set higher than"); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "ThreadLimit. Resetting to %d", thread_limit); - max_threads = thread_limit; - } - return NULL; -} - -static const char *set_child_per_uid(cmd_parms *cmd, void *dummy, const char *u, - const char *g, const char *num) -{ - int i; - int max_this_time = atoi(num) + curr_child_num; - - - for (i = curr_child_num; i < max_this_time; i++, curr_child_num++) { - if (i > num_daemons) { - return "Trying to use more child ID's than NumServers. Increase " - "NumServers in your config file."; - } - - child_info_table[i].uid = ap_uname2id(u); - child_info_table[i].gid = ap_gname2id(g); - -#ifndef BIG_SECURITY_HOLE - if (child_info_table[i].uid == 0 || child_info_table[i].gid == 0) { - return "Assigning root user/group to a child."; - } -#endif - } - return NULL; -} - -static const char *assign_childuid(cmd_parms *cmd, void *dummy, const char *uid, - const char *gid) -{ - int i; - int matching = 0; - int u = ap_uname2id(uid); - int g = ap_gname2id(gid); - const char *errstr; - int socks[2]; - perchild_server_conf *sconf = (perchild_server_conf *) - ap_get_module_config(cmd->server->module_config, - &mpm_perchild_module); - - sconf->fullsockname = apr_pstrcat(cmd->pool, sconf->sockname, ".", uid, - ":", gid, NULL); - - if ((errstr = make_perchild_socket(sconf->fullsockname, socks))) { - return errstr; - } - - sconf->input = socks[0]; - sconf->output = socks[1]; - - for (i = 0; i < num_daemons; i++) { - if (u == child_info_table[i].uid && g == child_info_table[i].gid) { - child_info_table[i].input = sconf->input; - child_info_table[i].output = sconf->output; - matching++; - ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, - "filling out child_info_table; UID: %d, GID: %d, " - "SD: %d %d, OUTPUT: %d %d, Child Num: %d", - child_info_table[i].uid, child_info_table[i].gid, - sconf->input, child_info_table[i].input, sconf->output, - child_info_table[i].output, i); - } - } - - if (!matching) { - return "Unable to find process with matching uid/gid."; - } - return NULL; -} - -static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg) -{ - int tmp_server_limit; - - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - tmp_server_limit = atoi(arg); - /* you cannot change ServerLimit across a restart; ignore - * any such attempts - */ - if (first_server_limit && - tmp_server_limit != server_limit) { - /* how do we log a message? the error log is a bit bucket at this - * point; we'll just have to set a flag so that ap_mpm_run() - * logs a warning later - */ - changed_limit_at_restart = 1; - return NULL; - } - server_limit = tmp_server_limit; - - if (server_limit > MAX_SERVER_LIMIT) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: ServerLimit of %d exceeds compile time limit " - "of %d servers,", server_limit, MAX_SERVER_LIMIT); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - " lowering ServerLimit to %d.", MAX_SERVER_LIMIT); - server_limit = MAX_SERVER_LIMIT; - } - else if (server_limit < 1) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: Require ServerLimit > 0, setting to 1"); - server_limit = 1; - } - return NULL; -} - -static const char *set_thread_limit (cmd_parms *cmd, void *dummy, const char *arg) -{ - int tmp_thread_limit; - - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - tmp_thread_limit = atoi(arg); - /* you cannot change ThreadLimit across a restart; ignore - * any such attempts - */ - if (first_thread_limit && - tmp_thread_limit != thread_limit) { - /* how do we log a message? the error log is a bit bucket at this - * point; we'll just have to set a flag so that ap_mpm_run() - * logs a warning later - */ - changed_limit_at_restart = 1; - return NULL; - } - thread_limit = tmp_thread_limit; - - if (thread_limit > MAX_THREAD_LIMIT) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: ThreadLimit of %d exceeds compile time limit " - "of %d servers,", thread_limit, MAX_THREAD_LIMIT); - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - " lowering ThreadLimit to %d.", MAX_THREAD_LIMIT); - thread_limit = MAX_THREAD_LIMIT; - } - else if (thread_limit < 1) { - ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, - "WARNING: Require ThreadLimit > 0, setting to 1"); - thread_limit = 1; - } - return NULL; -} - -static const command_rec perchild_cmds[] = { -UNIX_DAEMON_COMMANDS, -LISTEN_COMMANDS, -AP_INIT_TAKE1("NumServers", set_num_daemons, NULL, RSRC_CONF, - "Number of children alive at the same time"), -AP_INIT_TAKE1("StartThreads", set_threads_to_start, NULL, RSRC_CONF, - "Number of threads each child creates"), -AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF, - "Minimum number of idle threads per child, to handle " - "request spikes"), -AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF, - "Maximum number of idle threads per child"), -AP_INIT_TAKE1("MaxThreadsPerChild", set_max_threads, NULL, RSRC_CONF, - "Maximum number of threads per child"), -AP_INIT_TAKE3("ChildperUserID", set_child_per_uid, NULL, RSRC_CONF, - "Specify a User and Group for a specific child process."), -AP_INIT_TAKE2("AssignUserID", assign_childuid, NULL, RSRC_CONF, - "Tie a virtual host to a specific child process."), -AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF, - "Maximum value of NumServers for this run of Apache"), -AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF, - "Maximum worker threads in a server for this run of Apache"), -{ NULL } -}; - -static void *perchild_create_config(apr_pool_t *p, server_rec *s) -{ - perchild_server_conf *c = (perchild_server_conf *) - apr_pcalloc(p, sizeof(perchild_server_conf)); - - c->input = -1; - c->output = -1; - return c; -} - -module AP_MODULE_DECLARE_DATA mpm_perchild_module = { - MPM20_MODULE_STUFF, - ap_mpm_rewrite_args, /* hook to run before apache parses args */ - NULL, /* create per-directory config structure */ - NULL, /* merge per-directory config structures */ - perchild_create_config, /* create per-server config structure */ - NULL, /* merge per-server config structures */ - perchild_cmds, /* command apr_table_t */ - perchild_hooks /* register_hooks */ -}; - |