+++ /dev/null
-/* Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * This MPM tries to fix the 'keep alive problem' in HTTP.
- *
- * After a client completes the first request, the client can keep the
- * connection open to send more requests with the same socket. This can save
- * significant overhead in creating TCP connections. However, the major
- * disadvantage is that Apache traditionally keeps an entire child
- * process/thread waiting for data from the client. To solve this problem,
- * this MPM has a dedicated thread for handling both the Listening sockets,
- * and all sockets that are in a Keep Alive status.
- *
- * The MPM assumes the underlying apr_pollset implementation is somewhat
- * threadsafe. This currently is only compatible with KQueue and EPoll. This
- * enables the MPM to avoid extra high level locking or having to wake up the
- * listener thread when a keep-alive socket needs to be sent to it.
- *
- * This MPM does not perform well on older platforms that do not have very good
- * threading, like Linux with a 2.4 kernel, but this does not matter, since we
- * require EPoll or KQueue.
- *
- * For FreeBSD, use 5.3. It is possible to run this MPM on FreeBSD 5.2.1, if
- * you use libkse (see `man libmap.conf`).
- *
- * For NetBSD, use at least 2.0.
- *
- * For Linux, you should use a 2.6 kernel, and make sure your glibc has epoll
- * support compiled in.
- *
- */
-
-#include "apr.h"
-#include "apr_portable.h"
-#include "apr_strings.h"
-#include "apr_file_io.h"
-#include "apr_thread_proc.h"
-#include "apr_signal.h"
-#include "apr_thread_mutex.h"
-#include "apr_poll.h"
-#include "apr_ring.h"
-#include "apr_queue.h"
-#include "apr_atomic.h"
-#define APR_WANT_STRFUNC
-#include "apr_want.h"
-
-#if APR_HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#if APR_HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#if APR_HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif
-#ifdef HAVE_SYS_PROCESSOR_H
-#include <sys/processor.h> /* for bindprocessor() */
-#endif
-
-#if !APR_HAS_THREADS
-#error The EventOpt MPM requires APR threads, but they are unavailable.
-#endif
-
-#include "ap_config.h"
-#include "httpd.h"
-#include "http_main.h"
-#include "http_log.h"
-#include "http_config.h" /* for read_config */
-#include "http_core.h" /* for get_remote_host */
-#include "http_connection.h"
-#include "ap_mpm.h"
-#include "mpm_common.h"
-#include "ap_listen.h"
-#include "scoreboard.h"
-#include "fdqueue.h"
-#include "mpm_default.h"
-#include "http_vhost.h"
-#include "unixd.h"
-#include "util_time.h"
-
-#include <signal.h>
-#include <limits.h> /* for INT_MAX */
-
-
-#include "equeue.h"
-#include "apr_skiplist.h"
-
-#if HAVE_SERF
-#include "mod_serf.h"
-#include "serf.h"
-#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 16
-#endif
-
-/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want
- * some sort of compile-time limit to help catch typos.
- */
-#ifndef MAX_SERVER_LIMIT
-#define MAX_SERVER_LIMIT 20000
-#endif
-
-/* Limit on the threads per process. Clients will be locked out if more than
- * this are needed.
- *
- * We keep this for one reason it keeps the size of the scoreboard file small
- * enough that we can read the whole thing without worrying too much about
- * the overhead.
- */
-#ifndef DEFAULT_THREAD_LIMIT
-#define DEFAULT_THREAD_LIMIT 64
-#endif
-
-/* Admin can't tune ThreadLimit beyond MAX_THREAD_LIMIT. We want
- * some sort of compile-time limit to help catch typos.
- */
-#ifndef MAX_THREAD_LIMIT
-#define MAX_THREAD_LIMIT 100000
-#endif
-
-#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
-
-#ifndef MAX_SECS_TO_LINGER
-#define MAX_SECS_TO_LINGER 30
-#endif
-#define SECONDS_TO_LINGER 2
-
-/*
- * Actual definitions of config globals
- */
-
-#ifndef DEFAULT_WORKER_FACTOR
-#define DEFAULT_WORKER_FACTOR 2
-#endif
-#define WORKER_FACTOR_SCALE 16 /* scale factor to allow fractional values */
-static unsigned int worker_factor = DEFAULT_WORKER_FACTOR * WORKER_FACTOR_SCALE;
-
-static int threads_per_child = 0; /* Worker threads per child */
-static int ap_daemons_to_start = 0;
-static int min_spare_threads = 0;
-static int max_spare_threads = 0;
-static int ap_daemons_limit = 0;
-static int max_workers = 0;
-static int server_limit = 0;
-static int thread_limit = 0;
-static int had_healthy_child = 0;
-static int dying = 0;
-static int workers_may_exit = 0;
-static int start_thread_may_exit = 0;
-static int listener_may_exit = 0;
-static int num_listensocks = 0;
-static apr_int32_t conns_this_child; /* MaxConnectionsPerChild, only access
- in listener thread */
-static apr_uint32_t connection_count = 0; /* Number of open connections */
-static apr_uint32_t lingering_count = 0; /* Number of connections in lingering close */
-static apr_uint32_t suspended_count = 0; /* Number of suspended connections */
-static apr_uint32_t clogged_count = 0; /* Number of threads processing ssl conns */
-static int resource_shortage = 0;
-static fd_queue_t *worker_queue;
-static fd_queue_info_t *worker_queue_info;
-static int mpm_state = AP_MPMQ_STARTING;
-
-typedef enum {
- TIMEOUT_WRITE_COMPLETION,
- TIMEOUT_KEEPALIVE,
- TIMEOUT_LINGER,
- TIMEOUT_SHORT_LINGER
-} timeout_type_e;
-
-struct event_conn_state_t {
- /** APR_RING of expiration timeouts */
- APR_RING_ENTRY(event_conn_state_t) timeout_list;
- /** the expiration time of the next keepalive timeout */
- apr_time_t expiration_time;
- /** connection record this struct refers to */
- conn_rec *c;
- /** memory pool to allocate from */
- apr_pool_t *p;
- /** bucket allocator */
- apr_bucket_alloc_t *bucket_alloc;
- /** poll file descriptor information */
- apr_pollfd_t pfd;
- /** public parts of the connection state */
- conn_state_t pub;
-};
-
-typedef struct pollset_op_t {
- timeout_type_e timeout_type;
- event_conn_state_t *cs;
- const char *tag;
-} pollset_op_t;
-
-
-APR_RING_HEAD(timeout_head_t, event_conn_state_t);
-struct timeout_queue {
- struct timeout_head_t head;
- int count;
- const char *tag;
-};
-/*
- * Several timeout queues that use different timeouts, so that we always can
- * simply append to the end.
- * write_completion_q uses TimeOut
- * keepalive_q uses KeepAliveTimeOut
- * linger_q uses MAX_SECS_TO_LINGER
- * short_linger_q uses SECONDS_TO_LINGER
- */
-static struct timeout_queue write_completion_q, keepalive_q, linger_q,
- short_linger_q;
-static apr_pollfd_t *listener_pollfd;
-
-/*
- * Macros for accessing struct timeout_queue.
- * For TO_QUEUE_APPEND and TO_QUEUE_REMOVE, timeout_mutex must be held.
- */
-#define TO_QUEUE_APPEND(q, el) \
- do { \
- APR_RING_INSERT_TAIL(&(q).head, el, event_conn_state_t, timeout_list); \
- (q).count++; \
- } while (0)
-
-#define TO_QUEUE_REMOVE(q, el) \
- do { \
- APR_RING_REMOVE(el, timeout_list); \
- (q).count--; \
- } while (0)
-
-#define TO_QUEUE_INIT(q) \
- do { \
- APR_RING_INIT(&(q).head, event_conn_state_t, timeout_list); \
- (q).tag = #q; \
- } while (0)
-
-#define TO_QUEUE_ELEM_INIT(el) APR_RING_ELEM_INIT(el, timeout_list)
-
-/*
- * The pollset for sockets that are in any of the timeout queues. Currently
- * we use the timeout_mutex to make sure that connections are added/removed
- * atomically to/from both event_pollset and a timeout queue. Otherwise
- * some confusion can happen under high load if timeout queues and pollset
- * get out of sync.
- * XXX: It should be possible to make the lock unnecessary in many or even all
- * XXX: cases.
- */
-static apr_pollset_t *event_pollset;
-
-#if HAVE_SERF
-typedef struct {
- apr_pollset_t *pollset;
- apr_pool_t *pool;
-} s_baton_t;
-
-static serf_context_t *g_serf;
-#endif
-
-/* The structure used to pass unique initialization info to each thread */
-typedef struct
-{
- int pid;
- int tid;
- int sd;
-} proc_info;
-
-/* Structure used to pass information to the thread responsible for
- * creating the rest of the threads.
- */
-typedef struct
-{
- apr_thread_t **threads;
- apr_thread_t *listener;
- int child_num_arg;
- apr_threadattr_t *threadattr;
-} thread_starter;
-
-typedef enum
-{
- PT_CSD,
- PT_ACCEPT
-#if HAVE_SERF
- , PT_SERF
-#endif
-} poll_type_e;
-
-typedef struct
-{
- poll_type_e type;
- void *baton;
-} listener_poll_type;
-
-/* data retained by event across load/unload of the module
- * allocated on first call to pre-config hook; located on
- * subsequent calls to pre-config hook
- */
-typedef struct event_retained_data {
- int first_server_limit;
- int first_thread_limit;
- int module_loads;
- int sick_child_detected;
- ap_generation_t my_generation;
- int volatile is_graceful; /* set from signal handler */
- int maxclients_reported;
- /*
- * The max child slot ever assigned, preserved across restarts. Necessary
- * to deal with MaxRequestWorkers changes across AP_SIG_GRACEFUL restarts.
- * We use this value to optimize routines that have to scan the entire
- * scoreboard.
- */
- int max_daemons_limit;
- /*
- * idle_spawn_rate is the number of children that will be spawned on the
- * next maintenance cycle if there aren't enough idle servers. It is
- * maintained per listeners bucket, doubled up to MAX_SPAWN_RATE, and
- * reset only when a cycle goes by without the need to spawn.
- */
- int *idle_spawn_rate;
-#ifndef MAX_SPAWN_RATE
-#define MAX_SPAWN_RATE (32)
-#endif
- int hold_off_on_exponential_spawning;
- /*
- * Current number of listeners buckets and maximum reached accross
- * restarts (to size retained data according to dynamic num_buckets,
- * eg. idle_spawn_rate).
- */
- int num_buckets, max_buckets;
-} event_retained_data;
-static event_retained_data *retained;
-
-typedef struct event_child_bucket {
- ap_pod_t *pod;
- ap_listen_rec *listeners;
-} event_child_bucket;
-static event_child_bucket *all_buckets, /* All listeners buckets */
- *my_bucket; /* Current child bucket */
-
-#define ID_FROM_CHILD_THREAD(c, t) ((c * thread_limit) + t)
-
-/* The eventopt MPM respects a couple of runtime flags that can aid
- * in debugging. Setting the -DNO_DETACH flag will prevent the root process
- * from detaching from its controlling terminal. Additionally, setting
- * the -DONE_PROCESS flag (which implies -DNO_DETACH) will get you the
- * child_main loop running in the process which originally started up.
- * This gives you a pretty nice debugging environment. (You'll get a SIGHUP
- * early in standalone_main; just continue through. This is the server
- * trying to kill off any child processes which it might have lying
- * around --- Apache doesn't keep track of their pids, it just sends
- * SIGHUP to the process group, ignoring it in the root process.
- * Continue through and you'll be fine.).
- */
-
-static int one_process = 0;
-
-#ifdef DEBUG_SIGSTOP
-int raise_sigstop_flags;
-#endif
-
-static apr_pool_t *pconf; /* Pool for config stuff */
-static apr_pool_t *pchild; /* Pool for httpd child stuff */
-
-static pid_t ap_my_pid; /* Linux getpid() doesn't work except in main
- thread. Use this instead */
-static pid_t parent_pid;
-static apr_os_thread_t *listener_os_thread;
-
-/* The LISTENER_SIGNAL signal will be sent from the main thread to the
- * listener thread to wake it up for graceful termination (what a child
- * process from an old generation does when the admin does "apachectl
- * graceful"). This signal will be blocked in all threads of a child
- * process except for the listener thread.
- */
-#define LISTENER_SIGNAL SIGHUP
-
-/* An array of socket descriptors in use by each thread used to
- * perform a non-graceful (forced) shutdown of the server.
- */
-static apr_socket_t **worker_sockets;
-static ap_equeue_t **worker_equeues;
-
-static void disable_listensocks(int process_slot)
-{
- int i;
- for (i = 0; i < num_listensocks; i++) {
- apr_pollset_remove(event_pollset, &listener_pollfd[i]);
- }
- ap_scoreboard_image->parent[process_slot].not_accepting = 1;
-}
-
-static void enable_listensocks(int process_slot)
-{
- int i;
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00457)
- "Accepting new connections again: "
- "%u active conns (%u lingering/%u clogged/%u suspended), "
- "%u idle workers",
- apr_atomic_read32(&connection_count),
- apr_atomic_read32(&lingering_count),
- apr_atomic_read32(&clogged_count),
- apr_atomic_read32(&suspended_count),
- ap_queue_info_get_idlers(worker_queue_info));
- for (i = 0; i < num_listensocks; i++)
- apr_pollset_add(event_pollset, &listener_pollfd[i]);
- /*
- * XXX: This is not yet optimal. If many workers suddenly become available,
- * XXX: the parent may kill some processes off too soon.
- */
- ap_scoreboard_image->parent[process_slot].not_accepting = 0;
-}
-
-static void close_worker_sockets(void)
-{
- int i;
- for (i = 0; i < threads_per_child; i++) {
- if (worker_sockets[i]) {
- apr_socket_close(worker_sockets[i]);
- worker_sockets[i] = NULL;
- }
- }
-}
-
-static void wakeup_listener(void)
-{
- listener_may_exit = 1;
- if (!listener_os_thread) {
- /* XXX there is an obscure path that this doesn't handle perfectly:
- * right after listener thread is created but before
- * listener_os_thread is set, the first worker thread hits an
- * error and starts graceful termination
- */
- return;
- }
-
- /* unblock the listener if it's waiting for a worker */
- ap_queue_info_term(worker_queue_info);
-
- /*
- * we should just be able to "kill(ap_my_pid, LISTENER_SIGNAL)" on all
- * platforms and wake up the listener thread since it is the only thread
- * with SIGHUP unblocked, but that doesn't work on Linux
- */
-#ifdef HAVE_PTHREAD_KILL
- pthread_kill(*listener_os_thread, LISTENER_SIGNAL);
-#else
- kill(ap_my_pid, LISTENER_SIGNAL);
-#endif
-}
-
-#define ST_INIT 0
-#define ST_GRACEFUL 1
-#define ST_UNGRACEFUL 2
-
-static int terminate_mode = ST_INIT;
-
-static void signal_threads(int mode)
-{
- if (terminate_mode == mode) {
- return;
- }
- terminate_mode = mode;
- mpm_state = AP_MPMQ_STOPPING;
-
- /* in case we weren't called from the listener thread, wake up the
- * listener thread
- */
- wakeup_listener();
-
- /* for ungraceful termination, let the workers exit now;
- * for graceful termination, the listener thread will notify the
- * workers to exit once it has stopped accepting new connections
- */
- if (mode == ST_UNGRACEFUL) {
- workers_may_exit = 1;
- ap_queue_interrupt_all(worker_queue);
- close_worker_sockets(); /* forcefully kill all current connections */
- }
-}
-
-static int event_query(int query_code, int *result, apr_status_t *rv)
-{
- *rv = APR_SUCCESS;
- switch (query_code) {
- case AP_MPMQ_MAX_DAEMON_USED:
- *result = retained->max_daemons_limit;
- break;
- case AP_MPMQ_IS_THREADED:
- *result = AP_MPMQ_STATIC;
- break;
- case AP_MPMQ_IS_FORKED:
- *result = AP_MPMQ_DYNAMIC;
- break;
- case AP_MPMQ_IS_ASYNC:
- *result = 1;
- break;
- case AP_MPMQ_HAS_SERF:
- *result = 1;
- break;
- case AP_MPMQ_HARD_LIMIT_DAEMONS:
- *result = server_limit;
- break;
- case AP_MPMQ_HARD_LIMIT_THREADS:
- *result = thread_limit;
- break;
- case AP_MPMQ_MAX_THREADS:
- *result = threads_per_child;
- break;
- case AP_MPMQ_MIN_SPARE_DAEMONS:
- *result = 0;
- break;
- case AP_MPMQ_MIN_SPARE_THREADS:
- *result = min_spare_threads;
- break;
- case AP_MPMQ_MAX_SPARE_DAEMONS:
- *result = 0;
- break;
- case AP_MPMQ_MAX_SPARE_THREADS:
- *result = max_spare_threads;
- break;
- case AP_MPMQ_MAX_REQUESTS_DAEMON:
- *result = ap_max_requests_per_child;
- break;
- case AP_MPMQ_MAX_DAEMONS:
- *result = ap_daemons_limit;
- break;
- case AP_MPMQ_MPM_STATE:
- *result = mpm_state;
- break;
- case AP_MPMQ_GENERATION:
- *result = retained->my_generation;
- break;
- case AP_MPMQ_CAN_SUSPEND:
- *result = 1;
- break;
- default:
- *rv = APR_ENOTIMPL;
- break;
- }
- return OK;
-}
-
-static void event_note_child_killed(int childnum, pid_t pid, ap_generation_t gen)
-{
- if (childnum != -1) { /* child had a scoreboard slot? */
- ap_run_child_status(ap_server_conf,
- ap_scoreboard_image->parent[childnum].pid,
- ap_scoreboard_image->parent[childnum].generation,
- childnum, MPM_CHILD_EXITED);
- ap_scoreboard_image->parent[childnum].pid = 0;
- }
- else {
- ap_run_child_status(ap_server_conf, pid, gen, -1, MPM_CHILD_EXITED);
- }
-}
-
-static void event_note_child_started(int slot, pid_t pid)
-{
- ap_scoreboard_image->parent[slot].pid = pid;
- ap_run_child_status(ap_server_conf,
- ap_scoreboard_image->parent[slot].pid,
- retained->my_generation, slot, MPM_CHILD_STARTED);
-}
-
-static void event_note_child_lost_slot(int slot, pid_t newpid)
-{
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00458)
- "pid %" APR_PID_T_FMT " taking over scoreboard slot from "
- "%" APR_PID_T_FMT "%s",
- newpid,
- ap_scoreboard_image->parent[slot].pid,
- ap_scoreboard_image->parent[slot].quiescing ?
- " (quiescing)" : "");
- ap_run_child_status(ap_server_conf,
- ap_scoreboard_image->parent[slot].pid,
- ap_scoreboard_image->parent[slot].generation,
- slot, MPM_CHILD_LOST_SLOT);
- /* Don't forget about this exiting child process, or we
- * won't be able to kill it if it doesn't exit by the
- * time the server is shut down.
- */
- ap_register_extra_mpm_process(ap_scoreboard_image->parent[slot].pid,
- ap_scoreboard_image->parent[slot].generation);
-}
-
-static const char *event_get_name(void)
-{
- return "eventopt";
-}
-
-/* a clean exit from a child with proper cleanup */
-static void clean_child_exit(int code) __attribute__ ((noreturn));
-static void clean_child_exit(int code)
-{
- mpm_state = AP_MPMQ_STOPPING;
- if (pchild) {
- apr_pool_destroy(pchild);
- }
-
- if (one_process) {
- event_note_child_killed(/* slot */ 0, 0, 0);
- }
-
- exit(code);
-}
-
-static void just_die(int sig)
-{
- clean_child_exit(0);
-}
-
-/*****************************************************************
- * Connection structures and accounting...
- */
-
-static int child_fatal;
-
-/* volatile because they're updated from a signal handler */
-static int volatile shutdown_pending;
-static int volatile restart_pending;
-
-static apr_status_t decrement_connection_count(void *cs_)
-{
- event_conn_state_t *cs = cs_;
- switch (cs->pub.state) {
- case CONN_STATE_LINGER_NORMAL:
- case CONN_STATE_LINGER_SHORT:
- apr_atomic_dec32(&lingering_count);
- break;
- case CONN_STATE_SUSPENDED:
- apr_atomic_dec32(&suspended_count);
- break;
- default:
- break;
- }
- apr_atomic_dec32(&connection_count);
- return APR_SUCCESS;
-}
-
-/*
- * 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 appropriate. 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(int graceful)
-{
- mpm_state = AP_MPMQ_STOPPING;
- 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;
- retained->is_graceful = graceful;
-}
-
-/* do a graceful restart if graceful == 1 */
-static void ap_start_restart(int graceful)
-{
- mpm_state = AP_MPMQ_STOPPING;
- if (restart_pending == 1) {
- /* Probably not an error - don't bother reporting it */
- return;
- }
- restart_pending = 1;
- retained->is_graceful = graceful;
-}
-
-static void sig_term(int sig)
-{
- ap_start_shutdown(sig == AP_SIG_GRACEFUL_STOP);
-}
-
-static void restart(int sig)
-{
- ap_start_restart(sig == AP_SIG_GRACEFUL);
-}
-
-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, APLOGNO(00459)
- "sigaction(SIGTERM)");
-#ifdef AP_SIG_GRACEFUL_STOP
- if (sigaction(AP_SIG_GRACEFUL_STOP, &sa, NULL) < 0)
- ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00460)
- "sigaction(" AP_SIG_GRACEFUL_STOP_STRING ")");
-#endif
-#ifdef SIGINT
- if (sigaction(SIGINT, &sa, NULL) < 0)
- ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00461)
- "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, APLOGNO(00462)
- "sigaction(SIGXCPU)");
-#endif
-#ifdef SIGXFSZ
- /* For systems following the LFS standard, ignoring SIGXFSZ allows
- * a write() beyond the 2GB limit to fail gracefully with E2BIG
- * rather than terminate the process. */
- sa.sa_handler = SIG_IGN;
- if (sigaction(SIGXFSZ, &sa, NULL) < 0)
- ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00463)
- "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, APLOGNO(00464)
- "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, APLOGNO(00465)
- "sigaction(SIGHUP)");
- if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0)
- ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00466)
- "sigaction(" AP_SIG_GRACEFUL_STRING ")");
-#else
- if (!one_process) {
-#ifdef SIGXCPU
- apr_signal(SIGXCPU, SIG_DFL);
-#endif /* SIGXCPU */
-#ifdef SIGXFSZ
- apr_signal(SIGXFSZ, SIG_IGN);
-#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 AP_SIG_GRACEFUL_STOP
- apr_signal(AP_SIG_GRACEFUL_STOP, sig_term);
-#endif /* AP_SIG_GRACEFUL_STOP */
-#ifdef SIGPIPE
- apr_signal(SIGPIPE, SIG_IGN);
-#endif /* SIGPIPE */
-
-#endif
-}
-
-static int process_pollop(pollset_op_t *op)
-{
- apr_status_t rv;
- event_conn_state_t *cs = op->cs;
-
- switch (op->timeout_type) {
- case TIMEOUT_WRITE_COMPLETION:
- TO_QUEUE_APPEND(write_completion_q, cs);
- break;
- case TIMEOUT_KEEPALIVE:
- TO_QUEUE_APPEND(keepalive_q, cs);
- break;
- case TIMEOUT_LINGER:
- TO_QUEUE_APPEND(linger_q, cs);
- break;
- case TIMEOUT_SHORT_LINGER:
- TO_QUEUE_APPEND(short_linger_q, cs);
- break;
- }
-
- rv = apr_pollset_add(event_pollset, &op->cs->pfd);
-
- if (rv != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rv)) {
- ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00467)
- "%s: apr_pollset_add failure", op->tag);
- apr_socket_close(cs->pfd.desc.s);
- ap_push_pool(worker_queue_info, cs->p);
- return 0;
- }
- return 1;
-}
-
-/*
- * close our side of the connection
- * Pre-condition: cs is not in any timeout queue and not in the pollset,
- * timeout_mutex is not locked
- * return: 0 if connection is fully closed,
- * 1 if connection is lingering
- * may be called by listener or by worker thread.
- * the eq may be null if called from the listener thread,
- * and the pollset operations are done directly by this function.
- */
-static int start_lingering_close(event_conn_state_t *cs, ap_equeue_t *eq)
-{
- int ret = 1;
-
- apr_socket_t *csd = ap_get_conn_socket(cs->c);
- pollset_op_t localv;
- pollset_op_t *v;
-
- if (eq) {
- v = ap_equeue_writer_value(eq);
- }
- else {
- v = &localv;
- }
-
-#ifdef AP_DEBUG
- {
- apr_status_t rv = apr_socket_timeout_set(csd, 0);
- AP_DEBUG_ASSERT(rv == APR_SUCCESS);
- }
-#else
- apr_socket_timeout_set(csd, 0);
-#endif
- /*
- * If some module requested a shortened waiting period, only wait for
- * 2s (SECONDS_TO_LINGER). This is useful for mitigating certain
- * DoS attacks.
- */
- if (apr_table_get(cs->c->notes, "short-lingering-close")) {
- cs->expiration_time =
- apr_time_now() + apr_time_from_sec(SECONDS_TO_LINGER);
- v->timeout_type = TIMEOUT_SHORT_LINGER;
- v->tag = "start_lingering_close(short)";
- cs->pub.state = CONN_STATE_LINGER_SHORT;
- }
- else {
- cs->expiration_time =
- apr_time_now() + apr_time_from_sec(MAX_SECS_TO_LINGER);
- v->timeout_type = TIMEOUT_LINGER;
- v->tag = "start_lingering_close(normal)";
- cs->pub.state = CONN_STATE_LINGER_NORMAL;
- }
- apr_atomic_inc32(&lingering_count);
- cs->pfd.reqevents = (
- cs->pub.sense == CONN_SENSE_WANT_WRITE ? APR_POLLOUT :
- APR_POLLIN) | APR_POLLHUP | APR_POLLERR;
- cs->pub.sense = CONN_SENSE_DEFAULT;
- v->cs = cs;
- if (eq != NULL) {
- ap_equeue_writer_onward(eq);
- apr_pollset_wakeup(event_pollset);
- }
- else {
- ret = process_pollop(v);
- }
-
- return ret;
-}
-
-/*
- * Close our side of the connection, flushing data to the client first.
- * Pre-condition: cs is not in any timeout queue and not in the pollset,
- * timeout_mutex is not locked
- * return: 0 if connection is fully closed,
- * 1 if connection is lingering
- * May only be called by worker thread.
- */
-static int start_lingering_close_blocking(event_conn_state_t *cs, ap_equeue_t *eq)
-{
- if (ap_start_lingering_close(cs->c)) {
- ap_push_pool(worker_queue_info, cs->p);
- return 0;
- }
- return start_lingering_close(cs, eq);
-}
-
-/*
- * Close our side of the connection, NOT flushing data to the client.
- * This should only be called if there has been an error or if we know
- * that our send buffers are empty.
- * Pre-condition: cs is not in any timeout queue and not in the pollset,
- * timeout_mutex is not locked
- * return: 0 if connection is fully closed,
- * 1 if connection is lingering
- * may be called by listener thread
- */
-static int start_lingering_close_nonblocking(event_conn_state_t *cs, ap_equeue_t *eq)
-{
- conn_rec *c = cs->c;
- apr_socket_t *csd = cs->pfd.desc.s;
-
- if (c->aborted
- || ap_shutdown_conn(c, 0) != APR_SUCCESS || c->aborted
- || apr_socket_shutdown(csd, APR_SHUTDOWN_WRITE) != APR_SUCCESS) {
- apr_socket_close(csd);
- ap_push_pool(worker_queue_info, cs->p);
- return 0;
- }
- return start_lingering_close(cs, eq);
-}
-
-/*
- * forcibly close a lingering connection after the lingering period has
- * expired
- * Pre-condition: cs is not in any timeout queue and not in the pollset
- * return: irrelevant (need same prototype as start_lingering_close)
- */
-static int stop_lingering_close(event_conn_state_t *cs, ap_equeue_t *eq)
-{
- apr_status_t rv;
- apr_socket_t *csd = ap_get_conn_socket(cs->c);
- ap_log_error(APLOG_MARK, APLOG_TRACE4, 0, ap_server_conf,
- "socket reached timeout in lingering-close state");
- rv = apr_socket_close(csd);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00468) "error closing socket");
- AP_DEBUG_ASSERT(0);
- }
- ap_push_pool(worker_queue_info, cs->p);
- return 0;
-}
-
-/*
- * process one connection in the worker
- */
-static void process_socket(apr_thread_t *thd, apr_pool_t * p, apr_socket_t * sock,
- event_conn_state_t * cs,
- ap_equeue_t *eq,
- int my_child_num,
- int my_thread_num)
-{
- conn_rec *c;
- long conn_id = ID_FROM_CHILD_THREAD(my_child_num, my_thread_num);
- int rc;
- ap_sb_handle_t *sbh;
-
- ap_create_sb_handle(&sbh, p, my_child_num, my_thread_num);
-
- if (cs == NULL) { /* This is a new connection */
- listener_poll_type *pt = apr_pcalloc(p, sizeof(*pt));
- cs = apr_pcalloc(p, sizeof(event_conn_state_t));
- cs->bucket_alloc = apr_bucket_alloc_create(p);
- c = ap_run_create_connection(p, ap_server_conf, sock,
- conn_id, sbh, cs->bucket_alloc);
- if (!c) {
- ap_push_pool(worker_queue_info, p);
- return;
- }
- apr_atomic_inc32(&connection_count);
- apr_pool_cleanup_register(c->pool, cs, decrement_connection_count,
- apr_pool_cleanup_null);
- c->current_thread = thd;
- cs->c = c;
- c->cs = &(cs->pub);
- cs->p = p;
- cs->pfd.desc_type = APR_POLL_SOCKET;
- cs->pfd.reqevents = APR_POLLIN;
- cs->pfd.desc.s = sock;
- pt->type = PT_CSD;
- pt->baton = cs;
- cs->pfd.client_data = pt;
-
- ap_update_vhost_given_ip(c);
-
- rc = ap_run_pre_connection(c, sock);
- if (rc != OK && rc != DONE) {
- ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(00469)
- "process_socket: connection aborted");
- c->aborted = 1;
- }
-
- /**
- * XXX If the platform does not have a usable way of bundling
- * accept() with a socket readability check, like Win32,
- * and there are measurable delays before the
- * socket is readable due to the first data packet arriving,
- * it might be better to create the cs on the listener thread
- * with the state set to CONN_STATE_CHECK_REQUEST_LINE_READABLE
- *
- * FreeBSD users will want to enable the HTTP accept filter
- * module in their kernel for the highest performance
- * When the accept filter is active, sockets are kept in the
- * kernel until a HTTP request is received.
- */
- cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
-
- cs->pub.sense = CONN_SENSE_DEFAULT;
- }
- else {
- c = cs->c;
- c->sbh = sbh;
- c->current_thread = thd;
- /* Subsequent request on a conn, and thread number is part of ID */
- c->id = conn_id;
- }
-
- if (c->clogging_input_filters && !c->aborted) {
- /* Since we have an input filter which 'clogs' the input stream,
- * like mod_ssl used to, lets just do the normal read from input
- * filters, like the Worker MPM does. Filters that need to write
- * where they would otherwise read, or read where they would
- * otherwise write, should set the sense appropriately.
- */
- apr_atomic_inc32(&clogged_count);
- ap_run_process_connection(c);
- if (cs->pub.state != CONN_STATE_SUSPENDED) {
- cs->pub.state = CONN_STATE_LINGER;
- }
- apr_atomic_dec32(&clogged_count);
- }
-
-read_request:
- if (cs->pub.state == CONN_STATE_READ_REQUEST_LINE) {
- if (!c->aborted) {
- ap_run_process_connection(c);
-
- /* state will be updated upon return
- * fall thru to either wait for readability/timeout or
- * do lingering close
- */
- }
- else {
- cs->pub.state = CONN_STATE_LINGER;
- }
- }
-
- if (cs->pub.state == CONN_STATE_WRITE_COMPLETION) {
- ap_filter_t *output_filter = c->output_filters;
- apr_status_t rv;
- ap_update_child_status_from_conn(sbh, SERVER_BUSY_WRITE, c);
- while (output_filter->next != NULL) {
- output_filter = output_filter->next;
- }
- rv = output_filter->frec->filter_func.out_func(output_filter, NULL);
- if (rv != APR_SUCCESS) {
- ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(00470)
- "network write failure in core output filter");
- cs->pub.state = CONN_STATE_LINGER;
- }
- else if (c->data_in_output_filters) {
- /* Still in WRITE_COMPLETION_STATE:
- * Set a write timeout for this connection, and let the
- * event thread poll for writeability.
- */
- pollset_op_t *v = ap_equeue_writer_value(eq);
-
- cs->expiration_time = ap_server_conf->timeout + apr_time_now();
- c->sbh = NULL;
- cs->pfd.reqevents = (
- cs->pub.sense == CONN_SENSE_WANT_READ ? APR_POLLIN :
- APR_POLLOUT) | APR_POLLHUP | APR_POLLERR;
- cs->pub.sense = CONN_SENSE_DEFAULT;
-
- v->cs = cs;
- v->timeout_type = TIMEOUT_WRITE_COMPLETION;
- v->tag = "process_socket(write_completion)";
-
- ap_equeue_writer_onward(eq);
- apr_pollset_wakeup(event_pollset);
- return;
- }
- else if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted ||
- listener_may_exit) {
- cs->pub.state = CONN_STATE_LINGER;
- }
- else if (c->data_in_input_filters) {
- cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
- goto read_request;
- }
- else {
- cs->pub.state = CONN_STATE_CHECK_REQUEST_LINE_READABLE;
- }
- }
-
- if (cs->pub.state == CONN_STATE_LINGER) {
- if (!start_lingering_close_blocking(cs, eq)) {
- c->sbh = NULL;
- return;
- }
- }
- else if (cs->pub.state == CONN_STATE_CHECK_REQUEST_LINE_READABLE) {
- pollset_op_t *v;
-
- /* It greatly simplifies the logic to use a single timeout value here
- * because the new element can just be added to the end of the list and
- * it will stay sorted in expiration time sequence. If brand new
- * sockets are sent to the event thread for a readability check, this
- * will be a slight behavior change - they use the non-keepalive
- * timeout today. With a normal client, the socket will be readable in
- * a few milliseconds anyway.
- */
- cs->expiration_time = ap_server_conf->keep_alive_timeout +
- apr_time_now();
- c->sbh = NULL;
- /* Add work to pollset. */
- v = ap_equeue_writer_value(eq);
- v->timeout_type = TIMEOUT_KEEPALIVE;
- v->cs = cs;
- cs->pfd.reqevents = APR_POLLIN;
- v->tag = "process_socket(keepalive)";
- ap_equeue_writer_onward(eq);
- apr_pollset_wakeup(event_pollset);
- return;
- }
- else if (cs->pub.state == CONN_STATE_SUSPENDED) {
- apr_atomic_inc32(&suspended_count);
- }
- /*
- * Prevent this connection from writing to our connection state after it
- * is no longer associated with this thread. This would happen if the EOR
- * bucket is destroyed from the listener thread due to a connection abort
- * or timeout.
- */
- c->sbh = NULL;
- return;
-}
-
-/* conns_this_child has gone to zero or below. See if the admin coded
- "MaxConnectionsPerChild 0", and keep going in that case. Doing it this way
- simplifies the hot path in worker_thread */
-static void check_infinite_requests(void)
-{
- if (ap_max_requests_per_child) {
- ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
- "Stopping process due to MaxConnectionsPerChild");
- signal_threads(ST_GRACEFUL);
- }
- else {
- /* keep going */
- conns_this_child = APR_INT32_MAX;
- }
-}
-
-static void close_listeners(int process_slot, int *closed)
-{
- if (!*closed) {
- int i;
- disable_listensocks(process_slot);
- ap_close_listeners_ex(my_bucket->listeners);
- *closed = 1;
- dying = 1;
- ap_scoreboard_image->parent[process_slot].quiescing = 1;
- for (i = 0; i < threads_per_child; ++i) {
- ap_update_child_status_from_indexes(process_slot, i,
- SERVER_GRACEFUL, NULL);
- }
- /* wake up the main thread */
- kill(ap_my_pid, SIGTERM);
- }
-}
-
-static void unblock_signal(int sig)
-{
- sigset_t sig_mask;
-
- sigemptyset(&sig_mask);
- sigaddset(&sig_mask, sig);
-#if defined(SIGPROCMASK_SETS_THREAD_MASK)
- sigprocmask(SIG_UNBLOCK, &sig_mask, NULL);
-#else
- pthread_sigmask(SIG_UNBLOCK, &sig_mask, NULL);
-#endif
-}
-
-static void dummy_signal_handler(int sig)
-{
- /* XXX If specifying SIG_IGN is guaranteed to unblock a syscall,
- * then we don't need this goofy function.
- */
-}
-
-
-#if HAVE_SERF
-static apr_status_t s_socket_add(void *user_baton,
- apr_pollfd_t *pfd,
- void *serf_baton)
-{
- s_baton_t *s = (s_baton_t*)user_baton;
- /* XXXXX: recycle listener_poll_types */
- listener_poll_type *pt = ap_malloc(sizeof(*pt));
- pt->type = PT_SERF;
- pt->baton = serf_baton;
- pfd->client_data = pt;
- return apr_pollset_add(s->pollset, pfd);
-}
-
-static apr_status_t s_socket_remove(void *user_baton,
- apr_pollfd_t *pfd,
- void *serf_baton)
-{
- s_baton_t *s = (s_baton_t*)user_baton;
- listener_poll_type *pt = pfd->client_data;
- free(pt);
- return apr_pollset_remove(s->pollset, pfd);
-}
-#endif
-
-static apr_status_t init_pollset(apr_pool_t *p)
-{
-#if HAVE_SERF
- s_baton_t *baton = NULL;
-#endif
- ap_listen_rec *lr;
- listener_poll_type *pt;
- int i = 0;
-
- TO_QUEUE_INIT(write_completion_q);
- TO_QUEUE_INIT(keepalive_q);
- TO_QUEUE_INIT(linger_q);
- TO_QUEUE_INIT(short_linger_q);
-
- listener_pollfd = apr_palloc(p, sizeof(apr_pollfd_t) * num_listensocks);
- for (lr = my_bucket->listeners; lr != NULL; lr = lr->next, i++) {
- apr_pollfd_t *pfd;
- AP_DEBUG_ASSERT(i < num_listensocks);
- pfd = &listener_pollfd[i];
- pt = apr_pcalloc(p, sizeof(*pt));
- pfd->desc_type = APR_POLL_SOCKET;
- pfd->desc.s = lr->sd;
- pfd->reqevents = APR_POLLIN;
-
- pt->type = PT_ACCEPT;
- pt->baton = lr;
-
- pfd->client_data = pt;
-
- apr_socket_opt_set(pfd->desc.s, APR_SO_NONBLOCK, 1);
- apr_pollset_add(event_pollset, pfd);
-
- lr->accept_func = ap_unixd_accept;
- }
-
-#if HAVE_SERF
- baton = apr_pcalloc(p, sizeof(*baton));
- baton->pollset = event_pollset;
- /* TODO: subpools, threads, reuse, etc. -- currently use malloc() inside :( */
- baton->pool = p;
-
- g_serf = serf_context_create_ex(baton,
- s_socket_add,
- s_socket_remove, p);
-
- ap_register_provider(p, "mpm_serf",
- "instance", "0", g_serf);
-
-#endif
-
- return APR_SUCCESS;
-}
-
-static apr_status_t push_timer2worker(timer_event_t* te)
-{
- return ap_queue_push_timer(worker_queue, te);
-}
-
-/*
- * Pre-condition: pfd->cs is neither in pollset nor timeout queue
- * this function may only be called by the listener
- */
-static apr_status_t push2worker(const apr_pollfd_t * pfd,
- apr_pollset_t * pollset)
-{
- listener_poll_type *pt = (listener_poll_type *) pfd->client_data;
- event_conn_state_t *cs = (event_conn_state_t *) pt->baton;
- apr_status_t rc;
-
- rc = ap_queue_push(worker_queue, cs->pfd.desc.s, cs, cs->p);
- if (rc != APR_SUCCESS) {
- /* trash the connection; we couldn't queue the connected
- * socket to a worker
- */
- apr_bucket_alloc_destroy(cs->bucket_alloc);
- apr_socket_close(cs->pfd.desc.s);
- ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
- ap_server_conf, APLOGNO(00471) "push2worker: ap_queue_push failed");
- ap_push_pool(worker_queue_info, cs->p);
- }
-
- return rc;
-}
-
-/* get_worker:
- * If *have_idle_worker_p == 0, reserve a worker thread, and set
- * *have_idle_worker_p = 1.
- * If *have_idle_worker_p is already 1, will do nothing.
- * If blocking == 1, block if all workers are currently busy.
- * If no worker was available immediately, will set *all_busy to 1.
- * XXX: If there are no workers, we should not block immediately but
- * XXX: close all keep-alive connections first.
- */
-static void get_worker(int *have_idle_worker_p, int blocking, int *all_busy)
-{
- apr_status_t rc;
-
- if (*have_idle_worker_p) {
- /* already reserved a worker thread - must have hit a
- * transient error on a previous pass
- */
- return;
- }
-
- if (blocking)
- rc = ap_queue_info_wait_for_idler(worker_queue_info, all_busy);
- else
- rc = ap_queue_info_try_get_idler(worker_queue_info);
-
- if (rc == APR_SUCCESS) {
- *have_idle_worker_p = 1;
- }
- else if (!blocking && rc == APR_EAGAIN) {
- *all_busy = 1;
- }
- else if (!APR_STATUS_IS_EOF(rc)) {
- ap_log_error(APLOG_MARK, APLOG_ERR, rc, ap_server_conf, APLOGNO(00472)
- "ap_queue_info_wait_for_idler failed. "
- "Attempting to shutdown process gracefully");
- signal_threads(ST_GRACEFUL);
- }
-}
-
-/* Structures to reuse */
-static APR_RING_HEAD(timer_free_ring_t, timer_event_t) timer_free_ring;
-
-static apr_skiplist *timer_skiplist;
-
-static int indexing_comp(void *a, void *b)
-{
- apr_time_t t1 = (apr_time_t) (((timer_event_t *) a)->when);
- apr_time_t t2 = (apr_time_t) (((timer_event_t *) b)->when);
- AP_DEBUG_ASSERT(t1);
- AP_DEBUG_ASSERT(t2);
- return ((t1 < t2) ? -1 : ((t1 > t2) ? 1 : 0));
-}
-
-static int indexing_compk(void *ac, void *b)
-{
- apr_time_t *t1 = (apr_time_t *) ac;
- apr_time_t t2 = (apr_time_t) (((timer_event_t *) b)->when);
- AP_DEBUG_ASSERT(t2);
- return ((*t1 < t2) ? -1 : ((*t1 > t2) ? 1 : 0));
-}
-
-static apr_thread_mutex_t *g_timer_skiplist_mtx;
-
-static apr_status_t event_register_timed_callback(apr_time_t t,
- ap_mpm_callback_fn_t *cbfn,
- void *baton)
-{
- timer_event_t *te;
- /* oh yeah, and make locking smarter/fine grained. */
- apr_thread_mutex_lock(g_timer_skiplist_mtx);
-
- if (!APR_RING_EMPTY(&timer_free_ring, timer_event_t, link)) {
- te = APR_RING_FIRST(&timer_free_ring);
- APR_RING_REMOVE(te, link);
- }
- else {
- te = apr_skiplist_alloc(timer_skiplist, sizeof(timer_event_t));
- APR_RING_ELEM_INIT(te, link);
- }
-
- te->cbfunc = cbfn;
- te->baton = baton;
- /* XXXXX: optimize */
- te->when = t + apr_time_now();
-
- /* Okay, insert sorted by when.. */
- apr_skiplist_insert(timer_skiplist, (void *)te);
-
- apr_thread_mutex_unlock(g_timer_skiplist_mtx);
-
- return APR_SUCCESS;
-}
-
-/*
- * Close socket and clean up if remote closed its end while we were in
- * lingering close.
- * Only to be called in the listener thread;
- * Pre-condition: cs is in one of the linger queues and in the pollset
- */
-static void process_lingering_close(event_conn_state_t *cs, const apr_pollfd_t *pfd)
-{
- apr_socket_t *csd = ap_get_conn_socket(cs->c);
- char dummybuf[2048];
- apr_size_t nbytes;
- apr_status_t rv;
- struct timeout_queue *q;
- q = (cs->pub.state == CONN_STATE_LINGER_SHORT) ? &short_linger_q : &linger_q;
-
- /* socket is already in non-blocking state */
- do {
- nbytes = sizeof(dummybuf);
- rv = apr_socket_recv(csd, dummybuf, &nbytes);
- } while (rv == APR_SUCCESS);
-
- if (!APR_STATUS_IS_EOF(rv)) {
- return;
- }
-
- rv = apr_pollset_remove(event_pollset, pfd);
- AP_DEBUG_ASSERT(rv == APR_SUCCESS);
-
- rv = apr_socket_close(csd);
- AP_DEBUG_ASSERT(rv == APR_SUCCESS);
-
- TO_QUEUE_REMOVE(*q, cs);
- TO_QUEUE_ELEM_INIT(cs);
-
- ap_push_pool(worker_queue_info, cs->p);
-}
-
-/* call 'func' for all elements of 'q' with timeout less than 'timeout_time'.
- * Pre-condition: timeout_mutex must already be locked
- * Post-condition: timeout_mutex will be locked again
- */
-static void process_timeout_queue(struct timeout_queue *q,
- apr_time_t timeout_time,
- int (*func)(event_conn_state_t *, ap_equeue_t *eq))
-{
- int count = 0;
- event_conn_state_t *first, *cs, *last;
- apr_status_t rv;
- if (!q->count) {
- return;
- }
- AP_DEBUG_ASSERT(!APR_RING_EMPTY(&q->head, event_conn_state_t, timeout_list));
-
- cs = first = APR_RING_FIRST(&q->head);
- while (cs != APR_RING_SENTINEL(&q->head, event_conn_state_t, timeout_list)
- && cs->expiration_time < timeout_time) {
- last = cs;
- rv = apr_pollset_remove(event_pollset, &cs->pfd);
- if (rv != APR_SUCCESS && !APR_STATUS_IS_NOTFOUND(rv)) {
- ap_log_cerror(APLOG_MARK, APLOG_ERR, rv, cs->c, APLOGNO(00473)
- "apr_pollset_remove failed");
- }
- cs = APR_RING_NEXT(cs, timeout_list);
- count++;
- }
- if (!count)
- return;
-
- APR_RING_UNSPLICE(first, last, timeout_list);
- AP_DEBUG_ASSERT(q->count >= count);
- q->count -= count;
- while (count) {
- cs = APR_RING_NEXT(first, timeout_list);
- TO_QUEUE_ELEM_INIT(first);
- func(first, NULL);
- first = cs;
- count--;
- }
-}
-
-static void * APR_THREAD_FUNC listener_thread(apr_thread_t * thd, void *dummy)
-{
- timer_event_t *ep;
- timer_event_t *te;
- apr_status_t rc;
- proc_info *ti = dummy;
- int process_slot = ti->pid;
- apr_pool_t *tpool = apr_thread_pool_get(thd);
- void *csd = NULL;
- apr_pool_t *ptrans; /* Pool for per-transaction stuff */
- ap_listen_rec *lr;
- int have_idle_worker = 0;
- event_conn_state_t *cs;
- const apr_pollfd_t *out_pfd;
- apr_int32_t num = 0;
- apr_interval_time_t timeout_interval;
- apr_time_t timeout_time = 0, now, last_log;
- listener_poll_type *pt;
- int closed = 0, listeners_disabled = 0;
-
- last_log = apr_time_now();
- free(ti);
-
- /* the following times out events that are really close in the future
- * to prevent extra poll calls
- *
- * current value is .1 second
- */
-#define TIMEOUT_FUDGE_FACTOR 100000
-#define EVENT_FUDGE_FACTOR 10000
-
- rc = init_pollset(tpool);
- if (rc != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, rc, ap_server_conf,
- "failed to initialize pollset, "
- "attempting to shutdown process gracefully");
- signal_threads(ST_GRACEFUL);
- return NULL;
- }
-
- /* Unblock the signal used to wake this thread up, and set a handler for
- * it.
- */
- unblock_signal(LISTENER_SIGNAL);
- apr_signal(LISTENER_SIGNAL, dummy_signal_handler);
-
- for (;;) {
- apr_uint32_t i_count;
- int workers_were_busy = 0;
- if (listener_may_exit) {
- close_listeners(process_slot, &closed);
- if (terminate_mode == ST_UNGRACEFUL
- || apr_atomic_read32(&connection_count) == 0)
- break;
- }
-
- if (conns_this_child <= 0)
- check_infinite_requests();
-
- now = apr_time_now();
- if (APLOGtrace6(ap_server_conf)) {
- /* trace log status every second */
- if (now - last_log > apr_time_from_msec(1000)) {
- last_log = now;
- ap_log_error(APLOG_MARK, APLOG_TRACE6, 0, ap_server_conf,
- "connections: %u (clogged: %u write-completion: %d "
- "keep-alive: %d lingering: %d suspended: %u)",
- apr_atomic_read32(&connection_count),
- apr_atomic_read32(&clogged_count),
- write_completion_q.count,
- keepalive_q.count,
- apr_atomic_read32(&lingering_count),
- apr_atomic_read32(&suspended_count));
- }
- }
-
- apr_thread_mutex_lock(g_timer_skiplist_mtx);
- te = apr_skiplist_peek(timer_skiplist);
- if (te) {
- if (te->when > now) {
- timeout_interval = te->when - now;
- }
- else {
- timeout_interval = 1;
- }
- }
- else {
- timeout_interval = apr_time_from_msec(100);
- }
- apr_thread_mutex_unlock(g_timer_skiplist_mtx);
-
-#if HAVE_SERF
- rc = serf_context_prerun(g_serf);
- if (rc != APR_SUCCESS) {
- /* TOOD: what should do here? ugh. */
- }
-#endif
- rc = apr_pollset_poll(event_pollset, timeout_interval, &num, &out_pfd);
- if (rc != APR_SUCCESS
- && !APR_STATUS_IS_EINTR(rc)
- && !APR_STATUS_IS_TIMEUP(rc)) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rc, ap_server_conf,
- "apr_pollset_poll failed. Attempting to "
- "shutdown process gracefully");
- signal_threads(ST_GRACEFUL);
- }
-
- if (listener_may_exit) {
- close_listeners(process_slot, &closed);
- if (terminate_mode == ST_UNGRACEFUL
- || apr_atomic_read32(&connection_count) == 0)
- break;
- }
-
- now = apr_time_now() + EVENT_FUDGE_FACTOR;
- apr_thread_mutex_lock(g_timer_skiplist_mtx);
- ep = apr_skiplist_peek(timer_skiplist);
- while (ep) {
- if (ep->when < now) {
- apr_skiplist_pop(timer_skiplist, NULL);
- push_timer2worker(ep);
- }
- else {
- break;
- }
- ep = apr_skiplist_peek(timer_skiplist);
- }
- apr_thread_mutex_unlock(g_timer_skiplist_mtx);
-
- while (num) {
- pt = (listener_poll_type *) out_pfd->client_data;
- if (pt->type == PT_CSD) {
- /* one of the sockets is readable */
- struct timeout_queue *remove_from_q = &write_completion_q;
- int blocking = 1;
- cs = (event_conn_state_t *) pt->baton;
- switch (cs->pub.state) {
- case CONN_STATE_CHECK_REQUEST_LINE_READABLE:
- cs->pub.state = CONN_STATE_READ_REQUEST_LINE;
- remove_from_q = &keepalive_q;
- /* don't wait for a worker for a keepalive request */
- blocking = 0;
- /* FALL THROUGH */
- case CONN_STATE_WRITE_COMPLETION:
- get_worker(&have_idle_worker, blocking,
- &workers_were_busy);
- TO_QUEUE_REMOVE(*remove_from_q, cs);
- rc = apr_pollset_remove(event_pollset, &cs->pfd);
-
- /*
- * Some of the pollset backends, like KQueue or Epoll
- * automagically remove the FD if the socket is closed,
- * therefore, we can accept _SUCCESS or _NOTFOUND,
- * and we still want to keep going
- */
- if (rc != APR_SUCCESS && !APR_STATUS_IS_NOTFOUND(rc)) {
- ap_log_error(APLOG_MARK, APLOG_ERR, rc, ap_server_conf,
- "pollset remove failed");
- start_lingering_close_nonblocking(cs, NULL);
- break;
- }
-
- TO_QUEUE_ELEM_INIT(cs);
- /* If we didn't get a worker immediately for a keep-alive
- * request, we close the connection, so that the client can
- * re-connect to a different process.
- */
- if (!have_idle_worker) {
- start_lingering_close_nonblocking(cs, NULL);
- break;
- }
- rc = push2worker(out_pfd, event_pollset);
- if (rc != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
- ap_server_conf, "push2worker failed");
- }
- else {
- have_idle_worker = 0;
- }
- break;
- case CONN_STATE_LINGER_NORMAL:
- case CONN_STATE_LINGER_SHORT:
- process_lingering_close(cs, out_pfd);
- break;
- default:
- ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
- ap_server_conf,
- "event_loop: unexpected state %d",
- cs->pub.state);
- ap_assert(0);
- }
- }
- else if (pt->type == PT_ACCEPT) {
- int skip_accept = 0;
- apr_uint32_t connection_count_local = connection_count;
-
- /* A Listener Socket is ready for an accept() */
- if (workers_were_busy) {
- skip_accept = 1;
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
- "All workers busy, not accepting new conns "
- "in this process");
- }
- else if (listeners_disabled) {
- listeners_disabled = 0;
- enable_listensocks(process_slot);
- }
- else if (connection_count_local >
- (ap_queue_info_get_idlers(worker_queue_info)
- * worker_factor / WORKER_FACTOR_SCALE
- + threads_per_child))
- {
- skip_accept = 1;
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
- "Too many open connections (%u), "
- "not accepting new conns in this process",
- connection_count_local);
- ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
- "Idle workers: %u",
- ap_queue_info_get_idlers(worker_queue_info));
- }
-
- if (skip_accept == 0) {
- lr = (ap_listen_rec *) pt->baton;
- ap_pop_pool(&ptrans, worker_queue_info);
-
- if (ptrans == NULL) {
- /* create a new transaction pool for each accepted socket */
- apr_allocator_t *allocator;
-
- apr_allocator_create(&allocator);
- apr_allocator_max_free_set(allocator,
- ap_max_mem_free);
- apr_pool_create_ex(&ptrans, pconf, NULL, allocator);
- apr_allocator_owner_set(allocator, ptrans);
- if (ptrans == NULL) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
- ap_server_conf,
- "Failed to create transaction pool");
- signal_threads(ST_GRACEFUL);
- return NULL;
- }
- }
- apr_pool_tag(ptrans, "transaction");
-
- get_worker(&have_idle_worker, 1, &workers_were_busy);
- rc = lr->accept_func(&csd, lr, ptrans);
-
- /* later we trash rv and rely on csd to indicate
- * success/failure
- */
- AP_DEBUG_ASSERT(rc == APR_SUCCESS || !csd);
-
- if (rc == APR_EGENERAL) {
- /* E[NM]FILE, ENOMEM, etc */
- resource_shortage = 1;
- signal_threads(ST_GRACEFUL);
- }
-
- if (csd != NULL) {
- conns_this_child--;
- rc = ap_queue_push(worker_queue, csd, NULL, ptrans);
- if (rc != APR_SUCCESS) {
- /* trash the connection; we couldn't queue the connected
- * socket to a worker
- */
- apr_socket_close(csd);
- ap_log_error(APLOG_MARK, APLOG_CRIT, rc,
- ap_server_conf,
- "ap_queue_push failed");
- ap_push_pool(worker_queue_info, ptrans);
- }
- else {
- have_idle_worker = 0;
- }
- }
- else {
- ap_push_pool(worker_queue_info, ptrans);
- }
- }
- } /* if:else on pt->type */
-#if HAVE_SERF
- else if (pt->type == PT_SERF) {
- /* send socket to serf. */
- /* XXXX: this doesn't require get_worker() */
- serf_event_trigger(g_serf, pt->baton, out_pfd);
- }
-#endif
- out_pfd++;
- num--;
- } /* while for processing poll */
-
- {
- /* TODO: break out to separate function */
- int i;
-
- for (i = 0; i < threads_per_child; i++) {
- ap_equeue_t *eq = worker_equeues[i];
- pollset_op_t *op = NULL;
-
- while ((op = ap_equeue_reader_next(eq)) != NULL) {
- process_pollop(op);
- }
- }
- }
-
- /* XXX possible optimization: stash the current time for use as
- * r->request_time for new requests
- */
- now = apr_time_now();
- /* we only do this once per 0.1s (TIMEOUT_FUDGE_FACTOR) */
- if (now > timeout_time) {
- struct process_score *ps;
- timeout_time = now + TIMEOUT_FUDGE_FACTOR;
-
- /* handle timed out sockets */
-
- /* Step 1: keepalive timeouts */
- /* If all workers are busy, we kill older keep-alive connections so that they
- * may connect to another process.
- */
- if (workers_were_busy && keepalive_q.count) {
- ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, ap_server_conf,
- "All workers are busy, will close %d keep-alive "
- "connections",
- keepalive_q.count);
- /* add in an extra 2sec fudge factor */
- process_timeout_queue(&keepalive_q,
- timeout_time +
- ap_server_conf->keep_alive_timeout +
- apr_time_from_sec(2),
- start_lingering_close_nonblocking);
- }
- else {
- process_timeout_queue(&keepalive_q, timeout_time,
- start_lingering_close_nonblocking);
- }
- /* Step 2: write completion timeouts */
- process_timeout_queue(&write_completion_q, timeout_time,
- start_lingering_close_nonblocking);
- /* Step 3: (normal) lingering close completion timeouts */
- process_timeout_queue(&linger_q, timeout_time, stop_lingering_close);
- /* Step 4: (short) lingering close completion timeouts */
- process_timeout_queue(&short_linger_q, timeout_time, stop_lingering_close);
-
- ps = ap_get_scoreboard_process(process_slot);
- ps->write_completion = write_completion_q.count;
- ps->keep_alive = keepalive_q.count;
-
- ps->connections = apr_atomic_read32(&connection_count);
- ps->suspended = apr_atomic_read32(&suspended_count);
- ps->lingering_close = apr_atomic_read32(&lingering_count);
- }
- if (listeners_disabled && !workers_were_busy
- && (i_count = ap_queue_info_get_idlers(worker_queue_info)) > 0
- && (apr_atomic_read32(&connection_count)
- < (i_count - 1) * worker_factor / WORKER_FACTOR_SCALE
- + threads_per_child))
- {
- listeners_disabled = 0;
- enable_listensocks(process_slot);
- }
- /*
- * XXX: do we need to set some timeout that re-enables the listensocks
- * XXX: in case no other event occurs?
- */
- } /* listener main loop */
-
- close_listeners(process_slot, &closed);
- ap_queue_term(worker_queue);
-
- apr_thread_exit(thd, APR_SUCCESS);
- return NULL;
-}
-
-/* XXX For ungraceful termination/restart, we definitely don't want to
- * wait for active connections to finish but we may want to wait
- * for idle workers to get out of the queue code and release mutexes,
- * since those mutexes are cleaned up pretty soon and some systems
- * may not react favorably (i.e., segfault) if operations are attempted
- * on cleaned-up mutexes.
- */
-static void *APR_THREAD_FUNC worker_thread(apr_thread_t * thd, void *dummy)
-{
- proc_info *ti = dummy;
- int process_slot = ti->pid;
- int thread_slot = ti->tid;
- apr_socket_t *csd = NULL;
- event_conn_state_t *cs;
- apr_pool_t *ptrans; /* Pool for per-transaction stuff */
- apr_status_t rv;
- int is_idle = 0;
- timer_event_t *te = NULL;
- ap_equeue_t *eq = worker_equeues[thread_slot];
-
- free(ti);
-
- ap_scoreboard_image->servers[process_slot][thread_slot].pid = ap_my_pid;
- ap_scoreboard_image->servers[process_slot][thread_slot].tid = apr_os_thread_current();
- ap_scoreboard_image->servers[process_slot][thread_slot].generation = retained->my_generation;
- ap_update_child_status_from_indexes(process_slot, thread_slot,
- SERVER_STARTING, NULL);
-
- while (!workers_may_exit) {
- if (!is_idle) {
- rv = ap_queue_info_set_idle(worker_queue_info, NULL);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
- "ap_queue_info_set_idle failed. Attempting to "
- "shutdown process gracefully.");
- signal_threads(ST_GRACEFUL);
- break;
- }
- is_idle = 1;
- }
-
- ap_update_child_status_from_indexes(process_slot, thread_slot,
- dying ? SERVER_GRACEFUL : SERVER_READY, NULL);
- worker_pop:
- if (workers_may_exit) {
- break;
- }
-
- te = NULL;
- rv = ap_queue_pop_something(worker_queue, &csd, &cs, &ptrans, &te);
-
- if (rv != APR_SUCCESS) {
- /* We get APR_EOF during a graceful shutdown once all the
- * connections accepted by this server process have been handled.
- */
- if (APR_STATUS_IS_EOF(rv)) {
- break;
- }
- /* We get APR_EINTR whenever ap_queue_pop() has been interrupted
- * from an explicit call to ap_queue_interrupt_all(). This allows
- * us to unblock threads stuck in ap_queue_pop() when a shutdown
- * is pending.
- *
- * If workers_may_exit is set and this is ungraceful termination/
- * restart, we are bound to get an error on some systems (e.g.,
- * AIX, which sanity-checks mutex operations) since the queue
- * may have already been cleaned up. Don't log the "error" if
- * workers_may_exit is set.
- */
- else if (APR_STATUS_IS_EINTR(rv)) {
- goto worker_pop;
- }
- /* We got some other error. */
- else if (!workers_may_exit) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
- "ap_queue_pop failed");
- }
- continue;
- }
- if (te != NULL) {
- te->cbfunc(te->baton);
-
- {
- apr_thread_mutex_lock(g_timer_skiplist_mtx);
- APR_RING_INSERT_TAIL(&timer_free_ring, te, timer_event_t, link);
- apr_thread_mutex_unlock(g_timer_skiplist_mtx);
- }
- }
- else {
- is_idle = 0;
- worker_sockets[thread_slot] = csd;
- process_socket(thd, ptrans, csd, cs, eq, process_slot, thread_slot);
- worker_sockets[thread_slot] = NULL;
- }
- }
-
- ap_update_child_status_from_indexes(process_slot, thread_slot,
- dying ? SERVER_DEAD :
- SERVER_GRACEFUL,
- (request_rec *) NULL);
-
- apr_thread_exit(thd, APR_SUCCESS);
- return NULL;
-}
-
-static int check_signal(int signum)
-{
- switch (signum) {
- case SIGTERM:
- case SIGINT:
- return 1;
- }
- return 0;
-}
-
-
-
-static void create_listener_thread(thread_starter * ts)
-{
- int my_child_num = ts->child_num_arg;
- apr_threadattr_t *thread_attr = ts->threadattr;
- proc_info *my_info;
- apr_status_t rv;
-
- my_info = (proc_info *) ap_malloc(sizeof(proc_info));
- my_info->pid = my_child_num;
- my_info->tid = -1; /* listener thread doesn't have a thread slot */
- my_info->sd = 0;
- rv = apr_thread_create(&ts->listener, thread_attr, listener_thread,
- my_info, pchild);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(00474)
- "apr_thread_create: unable to create listener thread");
- /* let the parent decide how bad this really is */
- clean_child_exit(APEXIT_CHILDSICK);
- }
- apr_os_thread_get(&listener_os_thread, ts->listener);
-}
-
-/* XXX under some circumstances not understood, children can get stuck
- * in start_threads forever trying to take over slots which will
- * never be cleaned up; for now there is an APLOG_DEBUG message issued
- * every so often when this condition occurs
- */
-static void *APR_THREAD_FUNC start_threads(apr_thread_t * thd, void *dummy)
-{
- thread_starter *ts = dummy;
- apr_thread_t **threads = ts->threads;
- apr_threadattr_t *thread_attr = ts->threadattr;
- int child_num_arg = ts->child_num_arg;
- int my_child_num = child_num_arg;
- proc_info *my_info;
- apr_status_t rv;
- int i;
- int threads_created = 0;
- int listener_started = 0;
- int loops;
- int prev_threads_created;
- int max_recycled_pools = -1;
- int good_methods[] = {APR_POLLSET_KQUEUE, APR_POLLSET_PORT, APR_POLLSET_EPOLL};
-
- /* We must create the fd queues before we start up the listener
- * and worker threads. */
- worker_queue = apr_pcalloc(pchild, sizeof(*worker_queue));
- rv = ap_queue_init(worker_queue, threads_per_child, pchild);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
- "ap_queue_init() failed");
- clean_child_exit(APEXIT_CHILDFATAL);
- }
-
- if (ap_max_mem_free != APR_ALLOCATOR_MAX_FREE_UNLIMITED) {
- /* If we want to conserve memory, let's not keep an unlimited number of
- * pools & allocators.
- * XXX: This should probably be a separate config directive
- */
- max_recycled_pools = threads_per_child * 3 / 4 ;
- }
- rv = ap_queue_info_create(&worker_queue_info, pchild,
- threads_per_child, max_recycled_pools);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
- "ap_queue_info_create() failed");
- clean_child_exit(APEXIT_CHILDFATAL);
- }
-
- /* Create the main pollset */
- for (i = 0; i < sizeof(good_methods) / sizeof(void*); i++) {
- rv = apr_pollset_create_ex(&event_pollset,
- threads_per_child*2, /* XXX don't we need more, to handle
- * connections in K-A or lingering
- * close?
- */
- pchild, APR_POLLSET_WAKEABLE|APR_POLLSET_NOCOPY|APR_POLLSET_NODEFAULT,
- good_methods[i]);
- if (rv == APR_SUCCESS) {
- break;
- }
- }
- if (rv != APR_SUCCESS) {
- rv = apr_pollset_create(&event_pollset,
- threads_per_child*2, /* XXX don't we need more, to handle
- * connections in K-A or lingering
- * close?
- */
- pchild, APR_POLLSET_WAKEABLE|APR_POLLSET_NOCOPY);
- }
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
- "apr_pollset_create failed; check system or user limits");
- clean_child_exit(APEXIT_CHILDFATAL);
- }
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02472)
- "start_threads: Using %s", apr_pollset_method_name(event_pollset));
- worker_sockets = apr_pcalloc(pchild, threads_per_child
- * sizeof(apr_socket_t *));
-
- worker_equeues = apr_palloc(pchild, threads_per_child * sizeof(ap_equeue_t*));
-
- for (i = 0; i < threads_per_child; i++) {
- ap_equeue_t* eq = NULL;
- /* TODO: research/test optimal size of queue here */
- ap_equeue_create(pchild, 16, sizeof(pollset_op_t), &eq);
- /* same as thread ID */
- worker_equeues[i] = eq;
- }
-
- loops = prev_threads_created = 0;
- while (1) {
- /* threads_per_child does not include the listener thread */
- for (i = 0; i < threads_per_child; i++) {
- int status =
- ap_scoreboard_image->servers[child_num_arg][i].status;
-
- if (status != SERVER_GRACEFUL && status != SERVER_DEAD) {
- continue;
- }
-
- my_info = (proc_info *) ap_malloc(sizeof(proc_info));
- my_info->pid = my_child_num;
- my_info->tid = i;
- my_info->sd = 0;
-
- /* We are creating threads right now */
- ap_update_child_status_from_indexes(my_child_num, i,
- SERVER_STARTING, NULL);
- /* We let each thread update its own scoreboard entry. This is
- * done because it lets us deal with tid better.
- */
- rv = apr_thread_create(&threads[i], thread_attr,
- worker_thread, my_info, pchild);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf,
- "apr_thread_create: unable to create worker thread");
- /* let the parent decide how bad this really is */
- clean_child_exit(APEXIT_CHILDSICK);
- }
- threads_created++;
- }
-
- /* Start the listener only when there are workers available */
- if (!listener_started && threads_created) {
- create_listener_thread(ts);
- listener_started = 1;
- }
-
-
- if (start_thread_may_exit || threads_created == threads_per_child) {
- break;
- }
- /* wait for previous generation to clean up an entry */
- apr_sleep(apr_time_from_sec(1));
- ++loops;
- if (loops % 120 == 0) { /* every couple of minutes */
- if (prev_threads_created == threads_created) {
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
- "child %" APR_PID_T_FMT " isn't taking over "
- "slots very quickly (%d of %d)",
- ap_my_pid, threads_created,
- threads_per_child);
- }
- prev_threads_created = threads_created;
- }
- }
-
- /* What state should this child_main process be listed as in the
- * scoreboard...?
- * ap_update_child_status_from_indexes(my_child_num, i, SERVER_STARTING,
- * (request_rec *) NULL);
- *
- * This state should be listed separately in the scoreboard, in some kind
- * of process_status, not mixed in with the worker threads' status.
- * "life_status" is almost right, but it's in the worker's structure, and
- * the name could be clearer. gla
- */
- apr_thread_exit(thd, APR_SUCCESS);
- return NULL;
-}
-
-static void join_workers(apr_thread_t * listener, apr_thread_t ** threads)
-{
- int i;
- apr_status_t rv, thread_rv;
-
- if (listener) {
- int iter;
-
- /* deal with a rare timing window which affects waking up the
- * listener thread... if the signal sent to the listener thread
- * is delivered between the time it verifies that the
- * listener_may_exit flag is clear and the time it enters a
- * blocking syscall, the signal didn't do any good... work around
- * that by sleeping briefly and sending it again
- */
-
- iter = 0;
- while (iter < 10 && !dying) {
- /* listener has not stopped accepting yet */
- apr_sleep(apr_time_make(0, 500000));
- wakeup_listener();
- ++iter;
- }
- if (iter >= 10) {
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(00475)
- "the listener thread didn't stop accepting");
- }
- else {
- rv = apr_thread_join(&thread_rv, listener);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00476)
- "apr_thread_join: unable to join listener thread");
- }
- }
- }
-
- for (i = 0; i < threads_per_child; i++) {
- if (threads[i]) { /* if we ever created this thread */
- rv = apr_thread_join(&thread_rv, threads[i]);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00477)
- "apr_thread_join: unable to join worker "
- "thread %d", i);
- }
- }
- }
-}
-
-static void join_start_thread(apr_thread_t * start_thread_id)
-{
- apr_status_t rv, thread_rv;
-
- start_thread_may_exit = 1; /* tell it to give up in case it is still
- * trying to take over slots from a
- * previous generation
- */
- rv = apr_thread_join(&thread_rv, start_thread_id);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00478)
- "apr_thread_join: unable to join the start " "thread");
- }
-}
-
-static void child_main(int child_num_arg, int child_bucket)
-{
- apr_thread_t **threads;
- apr_status_t rv;
- thread_starter *ts;
- apr_threadattr_t *thread_attr;
- apr_thread_t *start_thread_id;
- apr_pool_t *pskip;
- int i;
-
- mpm_state = AP_MPMQ_STARTING; /* for benefit of any hooks that run as this
- * child initializes
- */
- ap_my_pid = getpid();
- ap_fatal_signal_child_setup(ap_server_conf);
- apr_pool_create(&pchild, pconf);
-
- /* close unused listeners and pods */
- for (i = 0; i < retained->num_buckets; i++) {
- if (i != child_bucket) {
- ap_close_listeners_ex(all_buckets[i].listeners);
- ap_mpm_podx_close(all_buckets[i].pod);
- }
- }
-
- /*stuff to do before we switch id's, so we have permissions. */
- ap_reopen_scoreboard(pchild, NULL, 0);
-
- if (ap_run_drop_privileges(pchild, ap_server_conf)) {
- clean_child_exit(APEXIT_CHILDFATAL);
- }
-
- apr_thread_mutex_create(&g_timer_skiplist_mtx, APR_THREAD_MUTEX_DEFAULT, pchild);
- APR_RING_INIT(&timer_free_ring, timer_event_t, link);
- apr_pool_create(&pskip, pchild);
- apr_skiplist_init(&timer_skiplist, pskip);
- apr_skiplist_set_compare(timer_skiplist, indexing_comp, indexing_compk);
- ap_run_child_init(pchild, ap_server_conf);
-
- /* done with init critical section */
-
- /* Just use the standard apr_setup_signal_thread to block all signals
- * from being received. The child processes no longer use signals for
- * any communication with the parent process.
- */
- rv = apr_setup_signal_thread();
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO(00479)
- "Couldn't initialize signal thread");
- clean_child_exit(APEXIT_CHILDFATAL);
- }
-
- if (ap_max_requests_per_child) {
- conns_this_child = ap_max_requests_per_child;
- }
- else {
- /* coding a value of zero means infinity */
- conns_this_child = APR_INT32_MAX;
- }
-
- /* Setup worker threads */
-
- /* clear the storage; we may not create all our threads immediately,
- * and we want a 0 entry to indicate a thread which was not created
- */
- threads = ap_calloc(threads_per_child, sizeof(apr_thread_t *));
- ts = apr_palloc(pchild, sizeof(*ts));
-
- apr_threadattr_create(&thread_attr, pchild);
- /* 0 means PTHREAD_CREATE_JOINABLE */
- apr_threadattr_detach_set(thread_attr, 0);
-
- if (ap_thread_stacksize != 0) {
- rv = apr_threadattr_stacksize_set(thread_attr, ap_thread_stacksize);
- if (rv != APR_SUCCESS && rv != APR_ENOTIMPL) {
- ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, APLOGNO(02436)
- "WARNING: ThreadStackSize of %" APR_SIZE_T_FMT " is "
- "inappropriate, using default",
- ap_thread_stacksize);
- }
- }
-
- ts->threads = threads;
- ts->listener = NULL;
- ts->child_num_arg = child_num_arg;
- ts->threadattr = thread_attr;
-
- rv = apr_thread_create(&start_thread_id, thread_attr, start_threads,
- ts, pchild);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ALERT, rv, ap_server_conf, APLOGNO(00480)
- "apr_thread_create: unable to create worker thread");
- /* let the parent decide how bad this really is */
- clean_child_exit(APEXIT_CHILDSICK);
- }
-
- mpm_state = AP_MPMQ_RUNNING;
-
- /* If we are only running in one_process mode, we will want to
- * still handle signals. */
- if (one_process) {
- /* Block until we get a terminating signal. */
- apr_signal_thread(check_signal);
- /* make sure the start thread has finished; signal_threads()
- * and join_workers() depend on that
- */
- /* XXX join_start_thread() won't be awakened if one of our
- * threads encounters a critical error and attempts to
- * shutdown this child
- */
- join_start_thread(start_thread_id);
-
- /* helps us terminate a little more quickly than the dispatch of the
- * signal thread; beats the Pipe of Death and the browsers
- */
- signal_threads(ST_UNGRACEFUL);
-
- /* A terminating signal was received. Now join each of the
- * workers to clean them up.
- * If the worker already exited, then the join frees
- * their resources and returns.
- * If the worker hasn't exited, then this blocks until
- * they have (then cleans up).
- */
- join_workers(ts->listener, threads);
- }
- else { /* !one_process */
- /* remove SIGTERM from the set of blocked signals... if one of
- * the other threads in the process needs to take us down
- * (e.g., for MaxConnectionsPerChild) it will send us SIGTERM
- */
- unblock_signal(SIGTERM);
- apr_signal(SIGTERM, dummy_signal_handler);
- /* Watch for any messages from the parent over the POD */
- while (1) {
- rv = ap_mpm_podx_check(my_bucket->pod);
- if (rv == AP_MPM_PODX_NORESTART) {
- /* see if termination was triggered while we slept */
- switch (terminate_mode) {
- case ST_GRACEFUL:
- rv = AP_MPM_PODX_GRACEFUL;
- break;
- case ST_UNGRACEFUL:
- rv = AP_MPM_PODX_RESTART;
- break;
- }
- }
- if (rv == AP_MPM_PODX_GRACEFUL || rv == AP_MPM_PODX_RESTART) {
- /* make sure the start thread has finished;
- * signal_threads() and join_workers depend on that
- */
- join_start_thread(start_thread_id);
- signal_threads(rv ==
- AP_MPM_PODX_GRACEFUL ? ST_GRACEFUL : ST_UNGRACEFUL);
- break;
- }
- }
-
- /* A terminating signal was received. Now join each of the
- * workers to clean them up.
- * If the worker already exited, then the join frees
- * their resources and returns.
- * If the worker hasn't exited, then this blocks until
- * they have (then cleans up).
- */
- join_workers(ts->listener, threads);
- }
-
- free(threads);
-
- clean_child_exit(resource_shortage ? APEXIT_CHILDSICK : 0);
-}
-
-static int make_child(server_rec * s, int slot, int bucket)
-{
- int pid;
-
- if (slot + 1 > retained->max_daemons_limit) {
- retained->max_daemons_limit = slot + 1;
- }
-
- if (one_process) {
- my_bucket = &all_buckets[0];
-
- set_signals();
- event_note_child_started(slot, getpid());
- child_main(slot, 0);
- /* NOTREACHED */
- ap_assert(0);
- return -1;
- }
-
- if ((pid = fork()) == -1) {
- ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, APLOGNO(00481)
- "fork: Unable to fork new process");
-
- /* fork didn't succeed. There's no need to touch the scoreboard;
- * if we were trying to replace a failed child process, then
- * server_main_loop() marked its workers SERVER_DEAD, and if
- * we were trying to replace a child process that exited normally,
- * its worker_thread()s left SERVER_DEAD or SERVER_GRACEFUL behind.
- */
-
- /* In case system resources are maxxed out, we don't want
- Apache running away with the CPU trying to fork over and
- over and over again. */
- apr_sleep(apr_time_from_sec(10));
-
- return -1;
- }
-
- if (!pid) {
- my_bucket = &all_buckets[bucket];
-
-#ifdef HAVE_BINDPROCESSOR
- /* By default, AIX binds to a single processor. This bit unbinds
- * children which will then bind to another CPU.
- */
- int status = bindprocessor(BINDPROCESS, (int) getpid(),
- PROCESSOR_CLASS_ANY);
- if (status != OK)
- ap_log_error(APLOG_MARK, APLOG_DEBUG, errno,
- ap_server_conf, APLOGNO(00482)
- "processor unbind failed");
-#endif
- RAISE_SIGSTOP(MAKE_CHILD);
-
- apr_signal(SIGTERM, just_die);
- child_main(slot, bucket);
- /* NOTREACHED */
- ap_assert(0);
- return -1;
- }
-
- if (ap_scoreboard_image->parent[slot].pid != 0) {
- /* This new child process is squatting on the scoreboard
- * entry owned by an exiting child process, which cannot
- * exit until all active requests complete.
- */
- event_note_child_lost_slot(slot, pid);
- }
- ap_scoreboard_image->parent[slot].quiescing = 0;
- ap_scoreboard_image->parent[slot].not_accepting = 0;
- ap_scoreboard_image->parent[slot].bucket = bucket;
- event_note_child_started(slot, pid);
- return 0;
-}
-
-/* start up a bunch of children */
-static void startup_children(int number_to_start)
-{
- int i;
-
- for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
- if (ap_scoreboard_image->parent[i].pid != 0) {
- continue;
- }
- if (make_child(ap_server_conf, i, i % retained->num_buckets) < 0) {
- break;
- }
- --number_to_start;
- }
-}
-
-static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
-{
- int i, j;
- int idle_thread_count;
- worker_score *ws;
- process_score *ps;
- int free_length;
- int totally_free_length = 0;
- int free_slots[MAX_SPAWN_RATE];
- int last_non_dead;
- int total_non_dead;
- int active_thread_count = 0;
-
- /* initialize the free_list */
- free_length = 0;
-
- idle_thread_count = 0;
- last_non_dead = -1;
- total_non_dead = 0;
-
- for (i = 0; i < ap_daemons_limit; ++i) {
- /* Initialization to satisfy the compiler. It doesn't know
- * that threads_per_child is always > 0 */
- int status = SERVER_DEAD;
- int any_dying_threads = 0;
- int any_dead_threads = 0;
- int all_dead_threads = 1;
- int child_threads_active = 0;
-
- if (i >= retained->max_daemons_limit
- && totally_free_length == retained->idle_spawn_rate[child_bucket])
- /* short cut if all active processes have been examined and
- * enough empty scoreboard slots have been found
- */
-
- break;
- ps = &ap_scoreboard_image->parent[i];
- for (j = 0; j < threads_per_child; j++) {
- ws = &ap_scoreboard_image->servers[i][j];
- status = ws->status;
-
- /* XXX any_dying_threads is probably no longer needed GLA */
- any_dying_threads = any_dying_threads ||
- (status == SERVER_GRACEFUL);
- any_dead_threads = any_dead_threads || (status == SERVER_DEAD);
- all_dead_threads = all_dead_threads &&
- (status == SERVER_DEAD || status == SERVER_GRACEFUL);
-
- /* We consider a starting server as idle because we started it
- * at least a cycle ago, and if it still hasn't finished starting
- * then we're just going to swamp things worse by forking more.
- * So we hopefully won't need to fork more if we count it.
- * This depends on the ordering of SERVER_READY and SERVER_STARTING.
- */
- if (ps->pid != 0) { /* XXX just set all_dead_threads in outer
- for loop if no pid? not much else matters */
- if (status <= SERVER_READY && !ps->quiescing && !ps->not_accepting
- && ps->generation == retained->my_generation
- && ps->bucket == child_bucket)
- {
- ++idle_thread_count;
- }
- if (status >= SERVER_READY && status < SERVER_GRACEFUL) {
- ++child_threads_active;
- }
- }
- }
- active_thread_count += child_threads_active;
- if (any_dead_threads
- && totally_free_length < retained->idle_spawn_rate[child_bucket]
- && free_length < MAX_SPAWN_RATE / num_buckets
- && (!ps->pid /* no process in the slot */
- || ps->quiescing)) { /* or at least one is going away */
- if (all_dead_threads) {
- /* great! we prefer these, because the new process can
- * start more threads sooner. So prioritize this slot
- * by putting it ahead of any slots with active threads.
- *
- * first, make room by moving a slot that's potentially still
- * in use to the end of the array
- */
- free_slots[free_length] = free_slots[totally_free_length];
- free_slots[totally_free_length++] = i;
- }
- else {
- /* slot is still in use - back of the bus
- */
- free_slots[free_length] = i;
- }
- ++free_length;
- }
- else if (child_threads_active == threads_per_child) {
- had_healthy_child = 1;
- }
- /* XXX if (!ps->quiescing) is probably more reliable GLA */
- if (!any_dying_threads) {
- last_non_dead = i;
- ++total_non_dead;
- }
- }
-
- if (retained->sick_child_detected) {
- if (had_healthy_child) {
- /* Assume this is a transient error, even though it may not be. Leave
- * the server up in case it is able to serve some requests or the
- * problem will be resolved.
- */
- retained->sick_child_detected = 0;
- }
- else {
- /* looks like a basket case, as no child ever fully initialized; give up.
- */
- shutdown_pending = 1;
- child_fatal = 1;
- ap_log_error(APLOG_MARK, APLOG_ALERT, 0,
- ap_server_conf, APLOGNO(00483)
- "No active workers found..."
- " Apache is exiting!");
- /* the child already logged the failure details */
- return;
- }
- }
-
- retained->max_daemons_limit = last_non_dead + 1;
-
- if (idle_thread_count > max_spare_threads / num_buckets) {
- /* Kill off one child */
- ap_mpm_podx_signal(all_buckets[child_bucket].pod,
- AP_MPM_PODX_GRACEFUL);
- retained->idle_spawn_rate[child_bucket] = 1;
- }
- else if (idle_thread_count < min_spare_threads / num_buckets) {
- /* terminate the free list */
- if (free_length == 0) { /* scoreboard is full, can't fork */
-
- if (active_thread_count >= ap_daemons_limit * threads_per_child) {
- if (!retained->maxclients_reported) {
- /* only report this condition once */
- ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00484)
- "server reached MaxRequestWorkers setting, "
- "consider raising the MaxRequestWorkers "
- "setting");
- retained->maxclients_reported = 1;
- }
- }
- else {
- ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00485)
- "scoreboard is full, not at MaxRequestWorkers");
- }
- retained->idle_spawn_rate[child_bucket] = 1;
- }
- else {
- if (free_length > retained->idle_spawn_rate[child_bucket]) {
- free_length = retained->idle_spawn_rate[child_bucket];
- }
- if (retained->idle_spawn_rate[child_bucket] >= 8) {
- ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00486)
- "server seems busy, (you may need "
- "to increase StartServers, ThreadsPerChild "
- "or Min/MaxSpareThreads), "
- "spawning %d children, there are around %d idle "
- "threads, and %d total children", free_length,
- idle_thread_count, total_non_dead);
- }
- for (i = 0; i < free_length; ++i) {
- make_child(ap_server_conf, free_slots[i], child_bucket);
- }
- /* the next time around we want to spawn twice as many if this
- * wasn't good enough, but not if we've just done a graceful
- */
- if (retained->hold_off_on_exponential_spawning) {
- --retained->hold_off_on_exponential_spawning;
- }
- else if (retained->idle_spawn_rate[child_bucket]
- < MAX_SPAWN_RATE / num_buckets) {
- retained->idle_spawn_rate[child_bucket] *= 2;
- }
- }
- }
- else {
- retained->idle_spawn_rate[child_bucket] = 1;
- }
-}
-
-static void server_main_loop(int remaining_children_to_start, int num_buckets)
-{
- ap_generation_t old_gen;
- int child_slot;
- apr_exit_why_e exitwhy;
- int status, processed_status;
- apr_proc_t pid;
- int i;
-
- while (!restart_pending && !shutdown_pending) {
- ap_wait_or_timeout(&exitwhy, &status, &pid, pconf, ap_server_conf);
-
- if (pid.pid != -1) {
- processed_status = ap_process_child_status(&pid, exitwhy, status);
- child_slot = ap_find_child_by_pid(&pid);
- if (processed_status == APEXIT_CHILDFATAL) {
- /* fix race condition found in PR 39311
- * A child created at the same time as a graceful happens
- * can find the lock missing and create a fatal error.
- * It is not fatal for the last generation to be in this state.
- */
- if (child_slot < 0
- || ap_get_scoreboard_process(child_slot)->generation
- == retained->my_generation) {
- shutdown_pending = 1;
- child_fatal = 1;
- return;
- }
- else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(00487)
- "Ignoring fatal error in child of previous "
- "generation (pid %ld).",
- (long)pid.pid);
- retained->sick_child_detected = 1;
- }
- }
- else if (processed_status == APEXIT_CHILDSICK) {
- /* tell perform_idle_server_maintenance to check into this
- * on the next timer pop
- */
- retained->sick_child_detected = 1;
- }
- /* non-fatal death... note that it's gone in the scoreboard. */
- if (child_slot >= 0) {
- process_score *ps;
-
- for (i = 0; i < threads_per_child; i++)
- ap_update_child_status_from_indexes(child_slot, i,
- SERVER_DEAD,
- (request_rec *) NULL);
-
- event_note_child_killed(child_slot, 0, 0);
- ps = &ap_scoreboard_image->parent[child_slot];
- ps->quiescing = 0;
- if (processed_status == APEXIT_CHILDSICK) {
- /* resource shortage, minimize the fork rate */
- retained->idle_spawn_rate[ps->bucket] = 1;
- }
- else if (remaining_children_to_start
- && child_slot < ap_daemons_limit) {
- /* we're still doing a 1-for-1 replacement of dead
- * children with new children
- */
- make_child(ap_server_conf, child_slot, ps->bucket);
- --remaining_children_to_start;
- }
- }
- else if (ap_unregister_extra_mpm_process(pid.pid, &old_gen) == 1) {
-
- event_note_child_killed(-1, /* already out of the scoreboard */
- pid.pid, old_gen);
- if (processed_status == APEXIT_CHILDSICK
- && old_gen == retained->my_generation) {
- /* resource shortage, minimize the fork rate */
- for (i = 0; i < num_buckets; i++) {
- retained->idle_spawn_rate[i] = 1;
- }
- }
-#if APR_HAS_OTHER_CHILD
- }
- else if (apr_proc_other_child_alert(&pid, APR_OC_REASON_DEATH,
- status) == 0) {
- /* handled */
-#endif
- }
- else if (retained->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_WARNING, 0,
- ap_server_conf, APLOGNO(00488)
- "long lost child came home! (pid %ld)",
- (long) pid.pid);
- }
- /* Don't perform idle maintenance when a child dies,
- * only do it when there's a timeout. Remember only a
- * finite number of children can die, and it's pretty
- * pathological for a lot to die suddenly.
- */
- 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;
- }
-
- for (i = 0; i < num_buckets; i++) {
- perform_idle_server_maintenance(i, num_buckets);
- }
- }
-}
-
-static int event_run(apr_pool_t * _pconf, apr_pool_t * plog, server_rec * s)
-{
- int num_buckets = retained->num_buckets;
- int remaining_children_to_start;
- int i;
-
- ap_log_pid(pconf, ap_pid_fname);
-
- if (!retained->is_graceful) {
- if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
- mpm_state = AP_MPMQ_STOPPING;
- return !OK;
- }
- /* fix the generation number in the global score; we just got a new,
- * cleared scoreboard
- */
- ap_scoreboard_image->global->running_generation = retained->my_generation;
- }
-
- restart_pending = shutdown_pending = 0;
- set_signals();
-
- /* Don't thrash since num_buckets depends on the
- * system and the number of online CPU cores...
- */
- if (ap_daemons_limit < num_buckets)
- ap_daemons_limit = num_buckets;
- if (ap_daemons_to_start < num_buckets)
- ap_daemons_to_start = num_buckets;
- if (min_spare_threads < threads_per_child * num_buckets)
- min_spare_threads = threads_per_child * num_buckets;
- if (max_spare_threads < min_spare_threads + threads_per_child * num_buckets)
- max_spare_threads = min_spare_threads + threads_per_child * num_buckets;
-
- /* If we're doing a graceful_restart then we're going to see a lot
- * of children exiting immediately when we get into the main loop
- * below (because we just sent them AP_SIG_GRACEFUL). This happens pretty
- * rapidly... and for each one that exits we may start a new one, until
- * there are at least min_spare_threads idle threads, counting across
- * all children. But we may be permitted to start more children than
- * that, so we'll just keep track of how many we're
- * supposed to start up without the 1 second penalty between each fork.
- */
- remaining_children_to_start = ap_daemons_to_start;
- if (remaining_children_to_start > ap_daemons_limit) {
- remaining_children_to_start = ap_daemons_limit;
- }
- if (!retained->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 */
- retained->hold_off_on_exponential_spawning = 10;
- }
-
- ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00489)
- "%s configured -- resuming normal operations",
- ap_get_server_description());
- ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00490)
- "Server built: %s", ap_get_server_built());
- ap_log_command_line(plog, s);
- ap_log_common(s);
-
- mpm_state = AP_MPMQ_RUNNING;
-
- server_main_loop(remaining_children_to_start, num_buckets);
- mpm_state = AP_MPMQ_STOPPING;
-
- if (shutdown_pending && !retained->is_graceful) {
- /* Time to shut down:
- * Kill child processes, tell them to call child_exit, etc...
- */
- for (i = 0; i < num_buckets; i++) {
- ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
- AP_MPM_PODX_RESTART);
- }
- ap_reclaim_child_processes(1, /* Start with SIGTERM */
- event_note_child_killed);
-
- if (!child_fatal) {
- /* cleanup pid file on normal shutdown */
- ap_remove_pid(pconf, ap_pid_fname);
- ap_log_error(APLOG_MARK, APLOG_NOTICE, 0,
- ap_server_conf, APLOGNO(00491) "caught SIGTERM, shutting down");
- }
- return DONE;
- } else if (shutdown_pending) {
- /* Time to gracefully shut down:
- * Kill child processes, tell them to call child_exit, etc...
- */
- int active_children;
- int index;
- apr_time_t cutoff = 0;
-
- /* Close our listeners, and then ask our children to do same */
- ap_close_listeners();
- for (i = 0; i < num_buckets; i++) {
- ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
- AP_MPM_PODX_GRACEFUL);
- }
- ap_relieve_child_processes(event_note_child_killed);
-
- if (!child_fatal) {
- /* cleanup pid file on normal shutdown */
- ap_remove_pid(pconf, ap_pid_fname);
- ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00492)
- "caught " AP_SIG_GRACEFUL_STOP_STRING
- ", shutting down gracefully");
- }
-
- if (ap_graceful_shutdown_timeout) {
- cutoff = apr_time_now() +
- apr_time_from_sec(ap_graceful_shutdown_timeout);
- }
-
- /* Don't really exit until each child has finished */
- shutdown_pending = 0;
- do {
- /* Pause for a second */
- apr_sleep(apr_time_from_sec(1));
-
- /* Relieve any children which have now exited */
- ap_relieve_child_processes(event_note_child_killed);
-
- active_children = 0;
- for (index = 0; index < ap_daemons_limit; ++index) {
- if (ap_mpm_safe_kill(MPM_CHILD_PID(index), 0) == APR_SUCCESS) {
- active_children = 1;
- /* Having just one child is enough to stay around */
- break;
- }
- }
- } while (!shutdown_pending && active_children &&
- (!ap_graceful_shutdown_timeout || apr_time_now() < cutoff));
-
- /* We might be here because we received SIGTERM, either
- * way, try and make sure that all of our processes are
- * really dead.
- */
- for (i = 0; i < num_buckets; i++) {
- ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
- AP_MPM_PODX_RESTART);
- }
- ap_reclaim_child_processes(1, event_note_child_killed);
-
- return DONE;
- }
-
- /* we've been told to restart */
- apr_signal(SIGHUP, SIG_IGN);
-
- if (one_process) {
- /* not worth thinking about */
- return DONE;
- }
-
- /* advance to the next generation */
- /* XXX: we really need to make sure this new generation number isn't in
- * use by any of the children.
- */
- ++retained->my_generation;
- ap_scoreboard_image->global->running_generation = retained->my_generation;
-
- if (retained->is_graceful) {
- ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00493)
- AP_SIG_GRACEFUL_STRING
- " received. Doing graceful restart");
- /* wake up the children...time to die. But we'll have more soon */
- for (i = 0; i < num_buckets; i++) {
- ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
- AP_MPM_PODX_GRACEFUL);
- }
-
- /* This is mostly for debugging... so that we know what is still
- * gracefully dealing with existing request.
- */
-
- }
- else {
- /* Kill 'em all. Since the child acts the same on the parents SIGTERM
- * and a SIGHUP, we may as well use the same signal, because some user
- * pthreads are stealing signals from us left and right.
- */
- for (i = 0; i < num_buckets; i++) {
- ap_mpm_podx_killpg(all_buckets[i].pod, ap_daemons_limit,
- AP_MPM_PODX_RESTART);
- }
-
- ap_reclaim_child_processes(1, /* Start with SIGTERM */
- event_note_child_killed);
- ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00494)
- "SIGHUP received. Attempting to restart");
- }
-
- return OK;
-}
-
-/* This really should be a post_config hook, but the error log is already
- * redirected by that point, so we need to do this in the open_logs phase.
- */
-static int event_open_logs(apr_pool_t * p, apr_pool_t * plog,
- apr_pool_t * ptemp, server_rec * s)
-{
- int startup = 0;
- int level_flags = 0;
- int num_buckets = 0;
- ap_listen_rec **listen_buckets;
- apr_status_t rv;
- int i;
-
- pconf = p;
-
- /* the reverse of pre_config, we want this only the first time around */
- if (retained->module_loads == 1) {
- startup = 1;
- level_flags |= APLOG_STARTUP;
- }
-
- if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
- ap_log_error(APLOG_MARK, APLOG_ALERT | level_flags, 0,
- (startup ? NULL : s),
- "no listening sockets available, shutting down");
- return DONE;
- }
-
- if (one_process) {
- num_buckets = 1;
- }
- else if (retained->is_graceful) {
- /* Preserve the number of buckets on graceful restarts. */
- num_buckets = retained->num_buckets;
- }
- if ((rv = ap_duplicate_listeners(pconf, ap_server_conf,
- &listen_buckets, &num_buckets))) {
- ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
- (startup ? NULL : s),
- "could not duplicate listeners");
- return DONE;
- }
-
- all_buckets = apr_pcalloc(pconf, num_buckets * sizeof(*all_buckets));
- for (i = 0; i < num_buckets; i++) {
- if (!one_process && /* no POD in one_process mode */
- (rv = ap_mpm_podx_open(pconf, &all_buckets[i].pod))) {
- ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
- (startup ? NULL : s),
- "could not open pipe-of-death");
- return DONE;
- }
- all_buckets[i].listeners = listen_buckets[i];
- }
-
- if (retained->max_buckets < num_buckets) {
- int new_max, *new_ptr;
- new_max = retained->max_buckets * 2;
- if (new_max < num_buckets) {
- new_max = num_buckets;
- }
- new_ptr = (int *)apr_palloc(ap_pglobal, new_max * sizeof(int));
- memcpy(new_ptr, retained->idle_spawn_rate,
- retained->num_buckets * sizeof(int));
- retained->idle_spawn_rate = new_ptr;
- retained->max_buckets = new_max;
- }
- if (retained->num_buckets < num_buckets) {
- int rate_max = 1;
- /* If new buckets are added, set their idle spawn rate to
- * the highest so far, so that they get filled as quickly
- * as the existing ones.
- */
- for (i = 0; i < retained->num_buckets; i++) {
- if (rate_max < retained->idle_spawn_rate[i]) {
- rate_max = retained->idle_spawn_rate[i];
- }
- }
- for (/* up to date i */; i < num_buckets; i++) {
- retained->idle_spawn_rate[i] = rate_max;
- }
- }
- retained->num_buckets = num_buckets;
-
- /* for skiplist */
- srand((unsigned int)apr_time_now());
- return OK;
-}
-
-static int event_pre_config(apr_pool_t * pconf, apr_pool_t * plog,
- apr_pool_t * ptemp)
-{
- int no_detach, debug, foreground;
- apr_status_t rv;
- const char *userdata_key = "mpm_eventopt_module";
-
- mpm_state = AP_MPMQ_STARTING;
-
- 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 */
- retained = ap_retained_data_get(userdata_key);
- if (!retained) {
- retained = ap_retained_data_create(userdata_key, sizeof(*retained));
- retained->max_daemons_limit = -1;
- }
- ++retained->module_loads;
- if (retained->module_loads == 2) {
- /* test for correct operation of fdqueue */
- static apr_uint32_t foo1, foo2;
-
- apr_atomic_set32(&foo1, 100);
- foo2 = apr_atomic_add32(&foo1, -10);
- if (foo2 != 100 || foo1 != 90) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL, APLOGNO(02406)
- "atomics not working as expected - add32 of negative number");
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- rv = apr_pollset_create(&event_pollset, 1, plog,
- APR_POLLSET_WAKEABLE|APR_POLLSET_NOCOPY);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00495)
- "apr_pollset_create failed; check system or user limits");
- return HTTP_INTERNAL_SERVER_ERROR;
- }
- apr_pollset_destroy(event_pollset);
-
- if (!one_process && !foreground) {
- /* before we detach, setup crash handlers to log to errorlog */
- ap_fatal_signal_setup(ap_server_conf, pconf);
- rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
- : APR_PROC_DETACH_DAEMONIZE);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO(00496)
- "apr_proc_detach failed");
- return HTTP_INTERNAL_SERVER_ERROR;
- }
- }
- }
-
- parent_pid = ap_my_pid = getpid();
-
- ap_listen_pre_config();
- ap_daemons_to_start = DEFAULT_START_DAEMON;
- min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
- max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
- server_limit = DEFAULT_SERVER_LIMIT;
- thread_limit = DEFAULT_THREAD_LIMIT;
- ap_daemons_limit = server_limit;
- threads_per_child = DEFAULT_THREADS_PER_CHILD;
- max_workers = ap_daemons_limit * threads_per_child;
- had_healthy_child = 0;
- ap_extended_status = 0;
-
- return OK;
-}
-
-static int event_check_config(apr_pool_t *p, apr_pool_t *plog,
- apr_pool_t *ptemp, server_rec *s)
-{
- int startup = 0;
-
- /* the reverse of pre_config, we want this only the first time around */
- if (retained->module_loads == 1) {
- startup = 1;
- }
-
- if (server_limit > MAX_SERVER_LIMIT) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00497)
- "WARNING: ServerLimit of %d exceeds compile-time "
- "limit of", server_limit);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " %d servers, decreasing to %d.",
- MAX_SERVER_LIMIT, MAX_SERVER_LIMIT);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00498)
- "ServerLimit of %d exceeds compile-time limit "
- "of %d, decreasing to match",
- server_limit, MAX_SERVER_LIMIT);
- }
- server_limit = MAX_SERVER_LIMIT;
- }
- else if (server_limit < 1) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00499)
- "WARNING: ServerLimit of %d not allowed, "
- "increasing to 1.", server_limit);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00500)
- "ServerLimit of %d not allowed, increasing to 1",
- server_limit);
- }
- server_limit = 1;
- }
-
- /* you cannot change ServerLimit across a restart; ignore
- * any such attempts
- */
- if (!retained->first_server_limit) {
- retained->first_server_limit = server_limit;
- }
- else if (server_limit != retained->first_server_limit) {
- /* don't need a startup console version here */
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00501)
- "changing ServerLimit to %d from original value of %d "
- "not allowed during restart",
- server_limit, retained->first_server_limit);
- server_limit = retained->first_server_limit;
- }
-
- if (thread_limit > MAX_THREAD_LIMIT) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00502)
- "WARNING: ThreadLimit of %d exceeds compile-time "
- "limit of", thread_limit);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " %d threads, decreasing to %d.",
- MAX_THREAD_LIMIT, MAX_THREAD_LIMIT);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00503)
- "ThreadLimit of %d exceeds compile-time limit "
- "of %d, decreasing to match",
- thread_limit, MAX_THREAD_LIMIT);
- }
- thread_limit = MAX_THREAD_LIMIT;
- }
- else if (thread_limit < 1) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00504)
- "WARNING: ThreadLimit of %d not allowed, "
- "increasing to 1.", thread_limit);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00505)
- "ThreadLimit of %d not allowed, increasing to 1",
- thread_limit);
- }
- thread_limit = 1;
- }
-
- /* you cannot change ThreadLimit across a restart; ignore
- * any such attempts
- */
- if (!retained->first_thread_limit) {
- retained->first_thread_limit = thread_limit;
- }
- else if (thread_limit != retained->first_thread_limit) {
- /* don't need a startup console version here */
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00506)
- "changing ThreadLimit to %d from original value of %d "
- "not allowed during restart",
- thread_limit, retained->first_thread_limit);
- thread_limit = retained->first_thread_limit;
- }
-
- if (threads_per_child > thread_limit) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00507)
- "WARNING: ThreadsPerChild of %d exceeds ThreadLimit "
- "of", threads_per_child);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " %d threads, decreasing to %d.",
- thread_limit, thread_limit);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " To increase, please see the ThreadLimit "
- "directive.");
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00508)
- "ThreadsPerChild of %d exceeds ThreadLimit "
- "of %d, decreasing to match",
- threads_per_child, thread_limit);
- }
- threads_per_child = thread_limit;
- }
- else if (threads_per_child < 1) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00509)
- "WARNING: ThreadsPerChild of %d not allowed, "
- "increasing to 1.", threads_per_child);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00510)
- "ThreadsPerChild of %d not allowed, increasing to 1",
- threads_per_child);
- }
- threads_per_child = 1;
- }
-
- if (max_workers < threads_per_child) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00511)
- "WARNING: MaxRequestWorkers of %d is less than "
- "ThreadsPerChild of", max_workers);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " %d, increasing to %d. MaxRequestWorkers must be at "
- "least as large",
- threads_per_child, threads_per_child);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " as the number of threads in a single server.");
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00512)
- "MaxRequestWorkers of %d is less than ThreadsPerChild "
- "of %d, increasing to match",
- max_workers, threads_per_child);
- }
- max_workers = threads_per_child;
- }
-
- ap_daemons_limit = max_workers / threads_per_child;
-
- if (max_workers % threads_per_child) {
- int tmp_max_workers = ap_daemons_limit * threads_per_child;
-
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00513)
- "WARNING: MaxRequestWorkers of %d is not an integer "
- "multiple of", max_workers);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " ThreadsPerChild of %d, decreasing to nearest "
- "multiple %d,", threads_per_child,
- tmp_max_workers);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " for a maximum of %d servers.",
- ap_daemons_limit);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00514)
- "MaxRequestWorkers of %d is not an integer multiple "
- "of ThreadsPerChild of %d, decreasing to nearest "
- "multiple %d", max_workers, threads_per_child,
- tmp_max_workers);
- }
- max_workers = tmp_max_workers;
- }
-
- if (ap_daemons_limit > server_limit) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00515)
- "WARNING: MaxRequestWorkers of %d would require %d "
- "servers and ", max_workers, ap_daemons_limit);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " would exceed ServerLimit of %d, decreasing to %d.",
- server_limit, server_limit * threads_per_child);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " To increase, please see the ServerLimit "
- "directive.");
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00516)
- "MaxRequestWorkers of %d would require %d servers and "
- "exceed ServerLimit of %d, decreasing to %d",
- max_workers, ap_daemons_limit, server_limit,
- server_limit * threads_per_child);
- }
- ap_daemons_limit = server_limit;
- }
-
- /* ap_daemons_to_start > ap_daemons_limit checked in ap_mpm_run() */
- if (ap_daemons_to_start < 1) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00517)
- "WARNING: StartServers of %d not allowed, "
- "increasing to 1.", ap_daemons_to_start);
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00518)
- "StartServers of %d not allowed, increasing to 1",
- ap_daemons_to_start);
- }
- ap_daemons_to_start = 1;
- }
-
- if (min_spare_threads < 1) {
- if (startup) {
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00519)
- "WARNING: MinSpareThreads of %d not allowed, "
- "increasing to 1", min_spare_threads);
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " to avoid almost certain server failure.");
- ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
- " Please read the documentation.");
- } else {
- ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00520)
- "MinSpareThreads of %d not allowed, increasing to 1",
- min_spare_threads);
- }
- min_spare_threads = 1;
- }
-
- /* max_spare_threads < min_spare_threads + threads_per_child
- * checked in ap_mpm_run()
- */
-
- return OK;
-}
-
-static void event_hooks(apr_pool_t * p)
-{
- /* Our open_logs hook function must run before the core's, or stderr
- * will be redirected to a file, and the messages won't print to the
- * console.
- */
- static const char *const aszSucc[] = { "core.c", NULL };
- one_process = 0;
- ap_force_set_tz(p);
-
- ap_hook_open_logs(event_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
- /* we need to set the MPM state before other pre-config hooks use MPM query
- * to retrieve it, so register as REALLY_FIRST
- */
- ap_hook_pre_config(event_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
- ap_hook_check_config(event_check_config, NULL, NULL, APR_HOOK_MIDDLE);
- ap_hook_mpm(event_run, NULL, NULL, APR_HOOK_MIDDLE);
- ap_hook_mpm_query(event_query, NULL, NULL, APR_HOOK_MIDDLE);
- ap_hook_mpm_register_timed_callback(event_register_timed_callback, NULL, NULL,
- APR_HOOK_MIDDLE);
- ap_hook_mpm_get_name(event_get_name, NULL, NULL, APR_HOOK_MIDDLE);
-}
-
-static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy,
- const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- ap_daemons_to_start = atoi(arg);
- return NULL;
-}
-
-static const char *set_min_spare_threads(cmd_parms * cmd, void *dummy,
- const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- min_spare_threads = atoi(arg);
- return NULL;
-}
-
-static const char *set_max_spare_threads(cmd_parms * cmd, void *dummy,
- const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- max_spare_threads = atoi(arg);
- return NULL;
-}
-
-static const char *set_max_workers(cmd_parms * cmd, void *dummy,
- const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
- if (!strcasecmp(cmd->cmd->name, "MaxClients")) {
- ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO(00521)
- "MaxClients is deprecated, use MaxRequestWorkers "
- "instead.");
- }
- max_workers = atoi(arg);
- return NULL;
-}
-
-static const char *set_threads_per_child(cmd_parms * cmd, void *dummy,
- const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- threads_per_child = atoi(arg);
- return NULL;
-}
-static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- server_limit = atoi(arg);
- return NULL;
-}
-
-static const char *set_thread_limit(cmd_parms * cmd, void *dummy,
- const char *arg)
-{
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- thread_limit = atoi(arg);
- return NULL;
-}
-
-static const char *set_worker_factor(cmd_parms * cmd, void *dummy,
- const char *arg)
-{
- double val;
- char *endptr;
- const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
- if (err != NULL) {
- return err;
- }
-
- val = strtod(arg, &endptr);
- if (*endptr)
- return "error parsing value";
-
- if (val <= 0)
- return "AsyncRequestWorkerFactor argument must be a positive number";
-
- worker_factor = val * WORKER_FACTOR_SCALE;
- if (worker_factor == 0)
- worker_factor = 1;
- return NULL;
-}
-
-
-static const command_rec event_cmds[] = {
- LISTEN_COMMANDS,
- AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
- "Number of child processes launched at server startup"),
- AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
- "Maximum number of child processes for this run of Apache"),
- AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF,
- "Minimum number of idle threads, to handle request spikes"),
- AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF,
- "Maximum number of idle threads"),
- AP_INIT_TAKE1("MaxClients", set_max_workers, NULL, RSRC_CONF,
- "Deprecated name of MaxRequestWorkers"),
- AP_INIT_TAKE1("MaxRequestWorkers", set_max_workers, NULL, RSRC_CONF,
- "Maximum number of threads alive at the same time"),
- AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
- "Number of threads each child creates"),
- AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF,
- "Maximum number of worker threads per child process for this "
- "run of Apache - Upper limit for ThreadsPerChild"),
- AP_INIT_TAKE1("AsyncRequestWorkerFactor", set_worker_factor, NULL, RSRC_CONF,
- "How many additional connects will be accepted per idle "
- "worker thread"),
- AP_GRACEFUL_SHUTDOWN_TIMEOUT_COMMAND,
- {NULL}
-};
-
-AP_DECLARE_MODULE(mpm_eventopt) = {
- MPM20_MODULE_STUFF,
- NULL, /* hook to run before apache parses args */
- NULL, /* create per-directory config structure */
- NULL, /* merge per-directory config structures */
- NULL, /* create per-server config structure */
- NULL, /* merge per-server config structures */
- event_cmds, /* command apr_table_t */
- event_hooks /* register_hooks */
-};
--- /dev/null
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_portable.h"
+#include "apr_strings.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+
+#define APR_WANT_STDIO
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "mpm_default.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "scoreboard.h"
+#include "ap_mpm.h"
+#include "util_mutex.h"
+#include "unixd.h"
+#include "http_vhost.h"
+#include "mpm_common.h"
+#include "ap_listen.h"
+#include "ap_mmn.h"
+#include "apr_poll.h"
+#include "apr_skiplist.h"
+#include "apr_thread_pool.h"
+#include "util_time.h"
+
+#include <stdlib.h>
+
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#ifdef HAVE_SYS_PROCESSOR_H
+#include <sys/processor.h> /* for bindprocessor() */
+#endif
+
+#include <signal.h>
+#include <sys/times.h>
+
+/* Limit on the total --- clients will be locked out if more servers than
+ * this are needed. It is intended solely to keep the server from crashing
+ * when things get out of hand.
+ *
+ * We keep a hard maximum number of servers, for two reasons --- first off,
+ * in case something goes seriously wrong, we want to stop the fork bomb
+ * short of actually crashing the machine we're running on by filling some
+ * kernel table. Secondly, it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_SERVER_LIMIT
+#define DEFAULT_SERVER_LIMIT 256
+#endif
+
+/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_SERVER_LIMIT
+#define MAX_SERVER_LIMIT 200000
+#endif
+
+/* Limit on the threads per process. Clients will be locked out if more than
+ * this are needed.
+ *
+ * We keep this for one reason it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_THREAD_LIMIT
+#define DEFAULT_THREAD_LIMIT 64
+#endif
+
+/* Admin can't tune ThreadLimit beyond MAX_THREAD_LIMIT. We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_THREAD_LIMIT
+#define MAX_THREAD_LIMIT 100000
+#endif
+
+/* config globals */
+
+static int threads_per_child = 0;
+static int ap_num_kids=0;
+static int ap_daemons_min_free=0;
+static int ap_daemons_max_free=0;
+static int ap_daemons_limit=0; /* MaxRequestWorkers */
+static int server_limit = 0;
+static int mpm_state = AP_MPMQ_STARTING;
+
+/* data retained by prefork across load/unload of the module
+ * allocated on first call to pre-config hook; located on
+ * subsequent calls to pre-config hook
+ */
+typedef struct motorz_core_t {
+ int first_server_limit;
+ int module_loads;
+ ap_generation_t my_generation;
+ int volatile is_graceful; /* set from signal handler */
+ int maxclients_reported;
+ /*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxRequestWorkers changes across AP_SIG_GRACEFUL restarts. We
+ * use this value to optimize routines that have to scan the entire scoreboard.
+ */
+ int max_daemons_limit;
+ apr_pool_t *pool;
+ apr_thread_mutex_t *mtx;
+ apr_pollcb_t *pollcb;
+ apr_skiplist *timer_ring;
+ apr_thread_pool_t *workers;
+} motorz_core_t;
+static motorz_core_t *g_motorz_core;
+
+typedef struct motorz_child_bucket {
+ ap_pod_t *pod;
+ ap_listen_rec *listeners;
+ apr_proc_mutex_t *mutex;
+} motorz_child_bucket;
+static int num_buckets; /* Number of listeners buckets */
+static motorz_child_bucket *all_buckets, /* All listeners buckets */
+ *my_bucket; /* Current child bucket */
+
+typedef enum
+{
+ PT_CSD,
+ PT_ACCEPT,
+ PT_USER
+} motorz_poll_type_e;
+
+typedef struct motorz_sb_t motorz_sb_t;
+struct motorz_sb_t
+{
+ motorz_poll_type_e type;
+ void *baton;
+};
+
+typedef void (*motorz_timer_cb) (motorz_core_t *mz, void *baton);
+typedef void (*motorz_io_sock_cb) (motorz_core_t *mz, apr_socket_t *sock,
+ int flags, void *baton);
+typedef void (*motorz_io_file_cb) (motorz_core_t *mz, apr_socket_t *sock,
+ int flags, void *baton);
+
+
+typedef struct motorz_timer_t motorz_timer_t;
+struct motorz_timer_t
+{
+ apr_time_t expires;
+ motorz_timer_cb cb;
+ void *baton;
+ apr_pool_t *pool;
+ motorz_core_t *mz;
+};
+
+typedef struct motorz_conn_t motorz_conn_t;
+struct motorz_conn_t
+{
+ apr_pool_t *pool;
+ motorz_core_t *mz;
+ apr_socket_t *sock;
+ apr_bucket_alloc_t *ba;
+ conn_rec *c;
+ /** poll file descriptor information */
+ apr_pollfd_t pfd;
+ /** public parts of the connection state */
+ conn_state_t cs;
+};
+
+static apr_status_t motorz_io_process(motorz_conn_t *scon);
+
+#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
+
+/* one_process --- debugging mode variable; can be set from the command line
+ * with the -X flag. If set, this gets you the child_main loop running
+ * in the process which originally started up (no detach, no make_child),
+ * which is a pretty nice debugging environment. (You'll get a SIGHUP
+ * early in standalone_main; just continue through. This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+static apr_pool_t *pconf; /* Pool for config stuff */
+static apr_pool_t *pchild; /* Pool for httpd child stuff */
+
+static pid_t ap_my_pid; /* it seems silly to call getpid all the time */
+static pid_t parent_pid;
+static int my_child_num;
+
+static void clean_child_exit(int code) __attribute__ ((noreturn));
+
+static motorz_core_t *motorz_core_get()
+{
+ return g_motorz_core;
+}
+
+static int indexing_comp(void *a, void *b)
+{
+ apr_time_t t1 = (apr_time_t) (((motorz_timer_t *) a)->expires);
+ apr_time_t t2 = (apr_time_t) (((motorz_timer_t *) b)->expires);
+ AP_DEBUG_ASSERT(t1);
+ AP_DEBUG_ASSERT(t2);
+ return ((t1 < t2) ? -1 : ((t1 > t2) ? 1 : 0));
+}
+
+static int indexing_compk(void *ac, void *b)
+{
+ apr_time_t *t1 = (apr_time_t *) ac;
+ apr_time_t t2 = (apr_time_t) (((motorz_timer_t *) b)->expires);
+ AP_DEBUG_ASSERT(t2);
+ return ((*t1 < t2) ? -1 : ((*t1 > t2) ? 1 : 0));
+}
+
+static apr_status_t motorz_timer_pool_cleanup(void *baton)
+{
+ motorz_timer_t *elem = (motorz_timer_t *)baton;
+ motorz_core_t *mz = elem->mz;
+
+ apr_thread_mutex_lock(mz->mtx);
+ apr_skiplist_remove(mz->timer_ring, elem, NULL);
+ apr_thread_mutex_unlock(mz->mtx);
+
+ return APR_SUCCESS;
+}
+
+static void motorz_io_timeout_cb(motorz_core_t * sc, void *baton)
+{
+ /* Code disabled because it does nothing yet but causes a compiler warning */
+#if 0
+ motorz_conn_t *mzon = (motorz_conn_t *) baton;
+ /* pqXXXXX: handle timeouts. */
+ conn_rec *c = scon->c;
+
+ cs = NULL;
+#endif
+
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO(00247)
+ "io timeout hit (?)");
+}
+
+static void *motorz_io_setup_conn(apr_thread_t * thread, void *baton)
+{
+ apr_status_t status;
+ ap_sb_handle_t *sbh;
+ long conn_id = 0;
+ motorz_sb_t *sb;
+ motorz_conn_t *scon = (motorz_conn_t *) baton;
+
+ ap_create_sb_handle(&sbh, scon->pool, 0, 0);
+
+ scon->ba = apr_bucket_alloc_create(scon->pool);
+
+ scon->c = ap_run_create_connection(scon->pool, ap_server_conf, scon->sock,
+ conn_id, sbh, scon->ba);
+ /* XXX: handle failure */
+
+ scon->c->cs = &scon->cs;
+ sb = apr_pcalloc(scon->pool, sizeof(motorz_sb_t));
+
+ scon->c->current_thread = thread;
+
+ scon->pfd.p = scon->pool;
+ scon->pfd.desc_type = APR_POLL_SOCKET;
+ scon->pfd.desc.s = scon->sock;
+ scon->pfd.reqevents = APR_POLLIN;
+
+ sb->type = PT_CSD;
+ sb->baton = scon;
+ scon->pfd.client_data = sb;
+
+ ap_update_vhost_given_ip(scon->c);
+
+ status = ap_run_pre_connection(scon->c, scon->sock);
+ if (status != OK && status != DONE) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO()
+ "motorz_io_setup_conn: connection aborted");
+ scon->c->aborted = 1;
+ }
+
+ scon->cs.state = CONN_STATE_READ_REQUEST_LINE;
+ scon->cs.sense = CONN_SENSE_DEFAULT;
+
+ status = motorz_io_process(scon);
+
+ if (status) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, status, ap_server_conf, APLOGNO()
+ "motorz_io_setup_conn: motorz_io_process failed (?)");
+ }
+
+ return NULL;
+}
+
+static apr_status_t motorz_io_user(motorz_core_t *mz, motorz_sb_t *sb)
+{
+ return APR_SUCCESS;
+}
+
+static apr_status_t motorz_io_accept(motorz_core_t *mz, motorz_sb_t *sb)
+{
+ apr_status_t rv;
+ apr_pool_t *ptrans;
+ apr_socket_t *socket;
+ ap_listen_rec *lr = (ap_listen_rec *) sb->baton;
+
+ apr_pool_create(&ptrans, NULL);
+
+ apr_pool_tag(ptrans, "transaction");
+
+ rv = lr->accept_func((void *)&socket, lr, ptrans);
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO()
+ "motorz_io_accept failed");
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ else {
+ motorz_conn_t *scon = apr_pcalloc(ptrans, sizeof(motorz_conn_t));
+ scon->pool = ptrans;
+ scon->sock = socket;
+ scon->mz = mz;
+
+ return apr_thread_pool_push(mz->workers,
+ motorz_io_setup_conn,
+ scon,
+ APR_THREAD_TASK_PRIORITY_NORMAL, NULL);
+ }
+
+ return APR_SUCCESS;
+}
+
+static void motorz_timer_run(motorz_timer_t *ep)
+{
+ apr_pool_cleanup_kill(ep->pool, ep, motorz_timer_pool_cleanup);
+
+ ep->cb(ep->mz, ep->baton);
+}
+
+static void *motorz_timer_invoke(apr_thread_t *thread, void *baton)
+{
+ motorz_timer_t *ep = (motorz_timer_t *)baton;
+
+ motorz_timer_run(ep);
+
+ return NULL;
+}
+
+static void *motorz_io_invoke(apr_thread_t * thread, void *baton)
+{
+ motorz_sb_t *sb = (motorz_sb_t *) baton;
+ motorz_conn_t *scon = (motorz_conn_t *) sb->baton;
+ apr_status_t rv;
+
+ scon->c->current_thread = thread;
+
+ rv = motorz_io_process(scon);
+
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO()
+ "motorz_io_invoke: motorz_io_process failed (?)");
+ }
+
+ return NULL;
+}
+
+static apr_status_t motorz_io_event_process(motorz_core_t *mz, motorz_sb_t *sb)
+{
+ return apr_thread_pool_push(mz->workers,
+ motorz_io_invoke,
+ sb, APR_THREAD_TASK_PRIORITY_NORMAL, NULL);
+}
+
+static apr_status_t motorz_io_callback(void *baton, apr_pollfd_t *pfd)
+{
+ apr_status_t status = APR_SUCCESS;
+ motorz_core_t *mz = (motorz_core_t *) baton;
+ motorz_sb_t *sb = pfd->client_data;
+
+
+ if (sb->type == PT_ACCEPT) {
+ status = motorz_io_accept(mz, sb);
+ }
+ else if (sb->type == PT_CSD) {
+ status = motorz_io_event_process(mz, sb);
+ }
+ else if (sb->type == PT_USER) {
+ status = motorz_io_user(mz, sb);
+ }
+ return status;
+}
+
+static void motorz_register_timer(motorz_core_t *mz,
+ motorz_timer_cb cb,
+ void *baton, apr_time_t relative_time,
+ apr_pool_t *shutdown_pool)
+{
+ motorz_timer_t *elem = NULL;
+ apr_time_t t = apr_time_now() + relative_time;
+
+ apr_thread_mutex_lock(mz->mtx);
+
+ elem = (motorz_timer_t *) apr_pcalloc(shutdown_pool, sizeof(motorz_timer_t));
+
+ elem->expires = t;
+ elem->cb = cb;
+ elem->baton = baton;
+ elem->pool = shutdown_pool;
+ elem->mz = mz;
+ apr_pool_cleanup_register(elem->pool, elem, motorz_timer_pool_cleanup, apr_pool_cleanup_null);
+ apr_skiplist_insert(mz->timer_ring, (void *)elem);
+ apr_thread_mutex_unlock(mz->mtx);
+}
+
+static apr_status_t motorz_io_process(motorz_conn_t *scon)
+{
+ apr_status_t rv;
+ motorz_core_t *mz;
+ conn_rec *c;
+
+ if (scon->c->clogging_input_filters && !scon->c->aborted) {
+ /* Since we have an input filter which 'clogs' the input stream,
+ * like mod_ssl used to, lets just do the normal read from input
+ * filters, like the Worker MPM does. Filters that need to write
+ * where they would otherwise read, or read where they would
+ * otherwise write, should set the sense appropriately.
+ */
+ ap_run_process_connection(scon->c);
+ if (scon->cs.state != CONN_STATE_SUSPENDED) {
+ scon->cs.state = CONN_STATE_LINGER;
+ }
+ }
+
+ mz = scon->mz;
+ c = scon->c;
+
+ while (!c->aborted) {
+
+ if (scon->pfd.reqevents != 0) {
+ rv = apr_pollcb_remove(mz->pollcb, &scon->pfd);
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00248)
+ "motorz_io_process: apr_pollcb_remove failure");
+ /*AP_DEBUG_ASSERT(rv == APR_SUCCESS);*/
+ }
+ scon->pfd.reqevents = 0;
+ }
+
+ if (scon->cs.state == CONN_STATE_READ_REQUEST_LINE) {
+ if (!c->aborted) {
+ ap_run_process_connection(c);
+ /* state will be updated upon return
+ * fall thru to either wait for readability/timeout or
+ * do lingering close
+ */
+ }
+ else {
+ scon->cs.state = CONN_STATE_LINGER;
+ }
+ }
+
+ if (scon->cs.state == CONN_STATE_WRITE_COMPLETION) {
+ ap_filter_t *output_filter = c->output_filters;
+ while (output_filter->next != NULL) {
+ output_filter = output_filter->next;
+ }
+
+ rv = output_filter->frec->filter_func.out_func(output_filter,
+ NULL);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, APLOGNO(00249)
+ "network write failure in core output filter");
+ scon->cs.state = CONN_STATE_LINGER;
+ }
+ else if (c->data_in_output_filters) {
+ /* Still in WRITE_COMPLETION_STATE:
+ * Set a write timeout for this connection, and let the
+ * event thread poll for writeability.
+ */
+
+ motorz_register_timer(scon->mz,
+ motorz_io_timeout_cb,
+ scon,
+ scon->c->base_server !=
+ NULL ? scon->c->base_server->
+ timeout : ap_server_conf->timeout,
+ scon->pool);
+
+ scon->pfd.reqevents = (
+ scon->cs.sense == CONN_SENSE_WANT_READ ? APR_POLLIN :
+ APR_POLLOUT) | APR_POLLHUP | APR_POLLERR;
+ scon->cs.sense = CONN_SENSE_DEFAULT;
+
+ rv = apr_pollcb_add(mz->pollcb, &scon->pfd);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, rv,
+ ap_server_conf, APLOGNO(00250)
+ "apr_pollcb_add: failed in write completion");
+ AP_DEBUG_ASSERT(rv == APR_SUCCESS);
+ }
+ return APR_SUCCESS;
+ }
+ else if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted) {
+ scon->cs.state = CONN_STATE_LINGER;
+ }
+ else if (c->data_in_input_filters) {
+ scon->cs.state = CONN_STATE_READ_REQUEST_LINE;
+ }
+ else {
+ scon->cs.state = CONN_STATE_CHECK_REQUEST_LINE_READABLE;
+ }
+ }
+
+ if (scon->cs.state == CONN_STATE_LINGER) {
+ ap_lingering_close(c);
+ apr_pool_destroy(scon->pool);
+ return APR_SUCCESS;
+ }
+
+ if (scon->cs.state == CONN_STATE_CHECK_REQUEST_LINE_READABLE) {
+ motorz_register_timer(scon->mz,
+ motorz_io_timeout_cb,
+ scon,
+ scon->c->base_server !=
+ NULL ? scon->c->base_server->
+ timeout : ap_server_conf->timeout,
+ scon->pool);
+
+ scon->pfd.reqevents = (
+ scon->cs.sense == CONN_SENSE_WANT_WRITE ? APR_POLLOUT :
+ APR_POLLIN);
+ scon->cs.sense = CONN_SENSE_DEFAULT;
+
+ rv = apr_pollcb_add(mz->pollcb, &scon->pfd);
+
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00251)
+ "process_socket: apr_pollcb_add failure in read request line");
+ AP_DEBUG_ASSERT(rv == APR_SUCCESS);
+ }
+
+ return APR_SUCCESS;
+ }
+ }
+
+ ap_lingering_close(c);
+ apr_pool_destroy(scon->pool);
+ return APR_SUCCESS;
+}
+
+/**
+ * Create worker thread pool.
+ */
+static apr_status_t motorz_setup_workers(motorz_core_t *mz)
+{
+ apr_status_t rv;
+
+ rv = apr_thread_pool_create(&mz->workers,
+ threads_per_child,
+ threads_per_child, mz->pool);
+
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO()
+ "motorz_setup_workers: apr_thread_pool_create with %d threads failed",
+ threads_per_child);
+ return rv;
+ }
+
+ return APR_SUCCESS;
+}
+
+static int motorz_setup_pollcb(motorz_core_t *mz)
+{
+ int i;
+ apr_status_t rv;
+ int good_methods[] = {APR_POLLSET_KQUEUE, APR_POLLSET_PORT, APR_POLLSET_EPOLL};
+
+ for (i = 0; i < sizeof(good_methods) / sizeof(void*); i++) {
+ rv = apr_pollcb_create_ex(&mz->pollcb, 512,
+ mz->pool, APR_POLLSET_NODEFAULT, good_methods[i]);
+ if (!rv) {
+ break;
+ }
+ }
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO()
+ "motorz_setup_pollcb: apr_pollcb_create failed for all possible backends!");
+ return rv;
+ }
+ return rv;
+}
+
+static void motorz_note_child_killed(int childnum, pid_t pid,
+ ap_generation_t gen)
+{
+ AP_DEBUG_ASSERT(childnum != -1); /* no scoreboard squatting with this MPM */
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[childnum].pid,
+ ap_scoreboard_image->parent[childnum].generation,
+ childnum, MPM_CHILD_EXITED);
+ ap_scoreboard_image->parent[childnum].pid = 0;
+}
+
+static void motorz_note_child_started(motorz_core_t *mz, int slot, pid_t pid)
+{
+ ap_scoreboard_image->parent[slot].pid = pid;
+ ap_run_child_status(ap_server_conf,
+ ap_scoreboard_image->parent[slot].pid,
+ mz->my_generation, slot, MPM_CHILD_STARTED);
+}
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code)
+{
+ mpm_state = AP_MPMQ_STOPPING;
+
+ apr_signal(SIGHUP, SIG_IGN);
+ apr_signal(SIGTERM, SIG_IGN);
+
+ if (pchild) {
+ apr_pool_destroy(pchild);
+ }
+
+ if (one_process) {
+ motorz_note_child_killed(/* slot */ 0, 0, 0);
+ }
+
+ ap_mpm_pod_close(my_bucket->pod);
+ exit(code);
+}
+
+static apr_status_t accept_mutex_on(void)
+{
+ motorz_core_t *mz = motorz_core_get();
+ apr_status_t rv = apr_proc_mutex_lock(my_bucket->mutex);
+ if (rv != APR_SUCCESS) {
+ const char *msg = "couldn't grab the accept mutex";
+
+ if (mz->my_generation !=
+ ap_scoreboard_image->global->running_generation) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO() "%s", msg);
+ clean_child_exit(0);
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO() "%s", msg);
+ exit(APEXIT_CHILDFATAL);
+ }
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t accept_mutex_off(void)
+{
+ motorz_core_t *mz = motorz_core_get();
+ apr_status_t rv = apr_proc_mutex_unlock(my_bucket->mutex);
+ if (rv != APR_SUCCESS) {
+ const char *msg = "couldn't release the accept mutex";
+
+ if (mz->my_generation !=
+ ap_scoreboard_image->global->running_generation) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf, APLOGNO() "%s", msg);
+ /* don't exit here... we have a connection to
+ * process, after which point we'll see that the
+ * generation changed and we'll exit cleanly
+ */
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, APLOGNO() "%s", msg);
+ exit(APEXIT_CHILDFATAL);
+ }
+ }
+ return APR_SUCCESS;
+}
+
+/* On some architectures it's safe to do unserialized accept()s in the single
+ * Listen case. But it's never safe to do it in the case where there's
+ * multiple Listen statements. Define SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+ * when it's safe in the single Listen case.
+ */
+#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+#define SAFE_ACCEPT(stmt) (ap_listeners->next ? (stmt) : APR_SUCCESS)
+#else
+#define SAFE_ACCEPT(stmt) (stmt)
+#endif
+
+static int motorz_query(int query_code, int *result, apr_status_t *rv)
+{
+ motorz_core_t *mz = motorz_core_get();
+ *rv = APR_SUCCESS;
+ switch(query_code){
+ case AP_MPMQ_IS_ASYNC:
+ *result = 1;
+ break;
+ case AP_MPMQ_MAX_DAEMON_USED:
+ *result = ap_daemons_limit;
+ break;
+ case AP_MPMQ_IS_THREADED:
+ *result = AP_MPMQ_STATIC;
+ break;
+ case AP_MPMQ_IS_FORKED:
+ *result = AP_MPMQ_DYNAMIC;
+ break;
+ case AP_MPMQ_HARD_LIMIT_DAEMONS:
+ *result = server_limit;
+ break;
+ case AP_MPMQ_HARD_LIMIT_THREADS:
+ *result = MAX_THREAD_LIMIT;
+ break;
+ case AP_MPMQ_MAX_THREADS:
+ *result = 1;
+ break;
+ case AP_MPMQ_MIN_SPARE_DAEMONS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MIN_SPARE_THREADS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_SPARE_DAEMONS:
+ *result = ap_daemons_max_free;
+ break;
+ case AP_MPMQ_MAX_SPARE_THREADS:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_REQUESTS_DAEMON:
+ *result = 0;
+ break;
+ case AP_MPMQ_MAX_DAEMONS:
+ *result = ap_daemons_limit;
+ break;
+ case AP_MPMQ_MPM_STATE:
+ *result = mpm_state;
+ break;
+ case AP_MPMQ_GENERATION:
+ *result = mz->my_generation;
+ break;
+ default:
+ *rv = APR_ENOTIMPL;
+ break;
+ }
+ return OK;
+}
+
+static const char *motorz_get_name(void)
+{
+ return "motorz";
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static void just_die(int sig)
+{
+ clean_child_exit(0);
+}
+
+/* volatile because they're updated from a signal handler */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile die_now = 0;
+
+static void stop_listening(int sig)
+{
+ mpm_state = AP_MPMQ_STOPPING;
+ ap_close_listeners_ex(my_bucket->listeners);
+
+ /* For a graceful stop, we want the child to exit when done */
+ die_now = 1;
+}
+
+static void sig_term(int sig)
+{
+ motorz_core_t *mz = motorz_core_get();
+ 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;
+ }
+ mpm_state = AP_MPMQ_STOPPING;
+ shutdown_pending = 1;
+ mz->is_graceful = (sig == AP_SIG_GRACEFUL_STOP);
+}
+
+/* restart() is the signal handler for SIGHUP and AP_SIG_GRACEFUL
+ * in the parent process, unless running in ONE_PROCESS mode
+ */
+static void restart(int sig)
+{
+ motorz_core_t *mz = motorz_core_get();
+ if (restart_pending == 1) {
+ /* Probably not an error - don't bother reporting it */
+ return;
+ }
+ mpm_state = AP_MPMQ_STOPPING;
+ restart_pending = 1;
+ mz->is_graceful = (sig == AP_SIG_GRACEFUL);
+}
+
+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, APLOGNO() "sigaction(SIGTERM)");
+#ifdef AP_SIG_GRACEFUL_STOP
+ if (sigaction(AP_SIG_GRACEFUL_STOP, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO()
+ "sigaction(" AP_SIG_GRACEFUL_STOP_STRING ")");
+#endif
+#ifdef SIGINT
+ if (sigaction(SIGINT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO() "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, APLOGNO() "sigaction(SIGXCPU)");
+#endif
+#ifdef SIGXFSZ
+ /* For systems following the LFS standard, ignoring SIGXFSZ allows
+ * a write() beyond the 2GB limit to fail gracefully with E2BIG
+ * rather than terminate the process. */
+ sa.sa_handler = SIG_IGN;
+ if (sigaction(SIGXFSZ, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO() "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, APLOGNO() "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, APLOGNO() "sigaction(SIGHUP)");
+ if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO() "sigaction(" AP_SIG_GRACEFUL_STRING ")");
+#else
+ if (!one_process) {
+#ifdef SIGXCPU
+ apr_signal(SIGXCPU, SIG_DFL);
+#endif /* SIGXCPU */
+#ifdef SIGXFSZ
+ apr_signal(SIGXFSZ, SIG_IGN);
+#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 AP_SIG_GRACEFUL_STOP
+ apr_signal(AP_SIG_GRACEFUL_STOP, sig_term);
+#endif /* AP_SIG_GRACEFUL */
+#ifdef SIGPIPE
+ apr_signal(SIGPIPE, SIG_IGN);
+#endif /* SIGPIPE */
+
+#endif
+}
+
+/*****************************************************************
+ * Child process main loop.
+ * The following vars are static to avoid getting clobbered by longjmp();
+ * they are really private to child_main.
+ */
+
+static int requests_this_child;
+static int num_listensocks = 0;
+
+static void child_main(motorz_core_t *mz, int child_num_arg, int child_bucket)
+{
+#if APR_HAS_THREADS
+ apr_thread_t *thd = NULL;
+ apr_os_thread_t osthd;
+#endif
+ apr_pool_t *ptrans;
+ apr_allocator_t *allocator;
+ apr_status_t status;
+ int i;
+ ap_listen_rec *lr;
+ ap_sb_handle_t *sbh;
+ apr_bucket_alloc_t *bucket_alloc;
+ const char *lockfile;
+
+ mpm_state = AP_MPMQ_STARTING; /* for benefit of any hooks that run as this
+ * child initializes
+ */
+
+ my_child_num = child_num_arg;
+ ap_my_pid = getpid();
+ requests_this_child = 0;
+
+ ap_fatal_signal_child_setup(ap_server_conf);
+
+ /* Get a sub context for global allocations in this child, so that
+ * we can have cleanups occur when the child exits.
+ */
+ apr_allocator_create(&allocator);
+ apr_allocator_max_free_set(allocator, ap_max_mem_free);
+ apr_pool_create_ex(&pchild, pconf, NULL, allocator);
+ apr_allocator_owner_set(allocator, pchild);
+ apr_pool_tag(pchild, "pchild");
+
+#if APR_HAS_THREADS
+ osthd = apr_os_thread_current();
+ apr_os_thread_put(&thd, &osthd, pchild);
+#endif
+
+ apr_pool_create(&ptrans, pchild);
+ apr_pool_tag(ptrans, "transaction");
+
+ /* close unused listeners and pods */
+ for (i = 0; i < num_buckets; i++) {
+ if (i != child_bucket) {
+ ap_close_listeners_ex(all_buckets[i].listeners);
+ ap_mpm_pod_close(all_buckets[i].pod);
+ }
+ }
+
+ /* needs to be done before we switch UIDs so we have permissions */
+ ap_reopen_scoreboard(pchild, NULL, 0);
+ status = SAFE_ACCEPT(apr_proc_mutex_child_init(&my_bucket->mutex,
+ apr_proc_mutex_lockfile(my_bucket->mutex),
+ pchild));
+ if (status != APR_SUCCESS) {
+ lockfile = apr_proc_mutex_lockfile(my_bucket->mutex);
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO()
+ "Couldn't initialize cross-process lock in child "
+ "(%s) (%s)",
+ lockfile ? lockfile : "none",
+ apr_proc_mutex_name(my_bucket->mutex));
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ if (ap_run_drop_privileges(pchild, ap_server_conf)) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ ap_run_child_init(pchild, ap_server_conf);
+
+ ap_create_sb_handle(&sbh, pchild, my_child_num, 0);
+
+ (void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
+
+ apr_skiplist_init(&mz->timer_ring, mz->pool);
+ apr_skiplist_set_compare(mz->timer_ring, indexing_comp, indexing_compk);
+
+ status = motorz_setup_workers(mz);
+ if (status != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL, APLOGNO()
+ "child_main: motorz_setup_workers failed");
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+
+ status = motorz_setup_pollcb(mz);
+ if (status != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO()
+ "Couldn't setup pollcb in child; check system or user limits");
+ clean_child_exit(APEXIT_CHILDSICK); /* assume temporary resource issue */
+ }
+
+ for (lr = my_bucket->listeners, i = num_listensocks; i--; lr = lr->next) {
+ apr_pollfd_t *pfd = apr_pcalloc(mz->pool, sizeof *pfd);
+ motorz_sb_t *sb = apr_pcalloc(mz->pool, sizeof(motorz_sb_t));
+
+ pfd->desc_type = APR_POLL_SOCKET;
+ pfd->desc.s = lr->sd;
+ pfd->reqevents = APR_POLLIN;
+ pfd->p = mz->pool;
+ pfd->client_data = sb;
+
+ sb->type = PT_ACCEPT;
+ sb->baton = lr;
+
+ status = apr_socket_opt_set(pfd->desc.s, APR_SO_NONBLOCK, 1);
+ if (status != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL, APLOGNO()
+ "apr_socket_opt_set(APR_SO_NONBLOCK = 1) failed on %pI",
+ lr->bind_addr);
+ clean_child_exit(0);
+ }
+
+ status = apr_pollcb_add(mz->pollcb, pfd);
+ if (status != APR_SUCCESS) {
+ /* If the child processed a SIGWINCH before setting up the
+ * pollset, this error path is expected and harmless,
+ * since the listener fd was already closed; so don't
+ * pollute the logs in that case. */
+ if (!die_now) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, APLOGNO()
+ "Couldn't add listener to pollcb; check system or user limits");
+ clean_child_exit(APEXIT_CHILDSICK);
+ }
+ clean_child_exit(0);
+ }
+
+ lr->accept_func = ap_unixd_accept;
+ }
+
+ mpm_state = AP_MPMQ_RUNNING;
+
+ bucket_alloc = apr_bucket_alloc_create(pchild);
+
+ /* die_now is set when AP_SIG_GRACEFUL is received in the child;
+ * shutdown_pending is set when SIGTERM is received when running
+ * in single process mode. */
+ while (!die_now && !shutdown_pending) {
+ /*
+ * (Re)initialize this child to a pre-connection state.
+ */
+
+ apr_pool_clear(ptrans);
+
+ if ((ap_max_requests_per_child > 0
+ && requests_this_child++ >= ap_max_requests_per_child)) {
+ clean_child_exit(0);
+ }
+
+ (void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
+ {
+ apr_time_t tnow = apr_time_now();
+ motorz_timer_t *te;
+ apr_interval_time_t timeout = apr_time_from_msec(500);
+
+ apr_thread_mutex_lock(mz->mtx);
+ te = apr_skiplist_peek(mz->timer_ring);
+
+ if (te) {
+ if (tnow < te->expires) {
+ timeout = (te->expires - tnow);
+ if (timeout > apr_time_from_msec(500)) {
+ timeout = apr_time_from_msec(500);
+ }
+ }
+ else {
+ timeout = 0;
+ }
+ }
+ apr_thread_mutex_unlock(mz->mtx);
+
+ status = apr_pollcb_poll(mz->pollcb, timeout, motorz_io_callback, mz);
+
+ tnow = apr_time_now();
+
+ if (status) {
+ if (!APR_STATUS_IS_EINTR(status) && !APR_STATUS_IS_TIMEUP(status)) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL,
+ "motorz_main_loop: apr_pollcb_poll failed");
+ clean_child_exit(0);
+ }
+ }
+
+ apr_thread_mutex_lock(mz->mtx);
+
+ /* now iterate any timers and push to worker pool */
+ while (te) {
+ if (te->expires < tnow) {
+ apr_skiplist_pop(mz->timer_ring, NULL);
+ apr_thread_pool_push(mz->workers,
+ motorz_timer_invoke,
+ te,
+ APR_THREAD_TASK_PRIORITY_NORMAL, NULL);
+ } else {
+ break;
+ }
+ te = apr_skiplist_peek(mz->timer_ring);
+ }
+
+ apr_thread_mutex_unlock(mz->mtx);
+ }
+ if (ap_mpm_pod_check(my_bucket->pod) == APR_SUCCESS) { /* selected as idle? */
+ die_now = 1;
+ }
+ else if (mz->my_generation !=
+ ap_scoreboard_image->global->running_generation) { /* restart? */
+ /* yeah, this could be non-graceful restart, in which case the
+ * parent will kill us soon enough, but why bother checking?
+ */
+ die_now = 1;
+ }
+ }
+ apr_pool_clear(ptrans); /* kludge to avoid crash in APR reslist cleanup code */
+ clean_child_exit(0);
+}
+
+
+static int make_child(motorz_core_t *mz, server_rec *s, int slot, int bucket)
+{
+ int pid;
+
+ if (slot + 1 > mz->max_daemons_limit) {
+ mz->max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ my_bucket = &all_buckets[0];
+
+ apr_signal(SIGHUP, sig_term);
+ /* Don't catch AP_SIG_GRACEFUL in ONE_PROCESS mode :) */
+ apr_signal(SIGINT, sig_term);
+#ifdef SIGQUIT
+ apr_signal(SIGQUIT, SIG_DFL);
+#endif
+ apr_signal(SIGTERM, sig_term);
+ motorz_note_child_started(mz, slot, getpid());
+ child_main(mz, slot, 0);
+ /* NOTREACHED */
+ ap_assert(0);
+ return -1;
+ }
+
+ (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, APLOGNO() "fork: Unable to fork new process");
+
+ /* fork didn't succeed. Fix the scoreboard or else
+ * it will say SERVER_STARTING forever and ever
+ */
+ (void) ap_update_child_status_from_indexes(slot, 0, SERVER_DEAD,
+ (request_rec *) NULL);
+
+ /* In case system resources are maxxed out, we don't want
+ * Apache running away with the CPU trying to fork over and
+ * over and over again.
+ */
+ sleep(10);
+
+ return -1;
+ }
+
+ if (!pid) {
+ my_bucket = &all_buckets[bucket];
+
+#ifdef HAVE_BINDPROCESSOR
+ /* by default AIX binds to a single processor
+ * this bit unbinds children which will then bind to another cpu
+ */
+ int status = bindprocessor(BINDPROCESS, (int)getpid(),
+ PROCESSOR_CLASS_ANY);
+ if (status != OK) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, errno,
+ ap_server_conf, APLOGNO() "processor unbind failed");
+ }
+#endif
+ RAISE_SIGSTOP(MAKE_CHILD);
+ AP_MONCONTROL(1);
+ /* Disable the parent's signal handlers and set up proper handling in
+ * the child.
+ */
+ apr_signal(SIGHUP, just_die);
+ apr_signal(SIGTERM, just_die);
+ /* Ignore SIGINT in child. This fixes race-condition in signals
+ * handling when httpd is runnning on foreground and user hits ctrl+c.
+ * In this case, SIGINT is sent to all children followed by SIGTERM
+ * from the main process, which interrupts the SIGINT handler and
+ * leads to inconsistency.
+ */
+ apr_signal(SIGINT, SIG_IGN);
+ /* The child process just closes listeners on AP_SIG_GRACEFUL.
+ * The pod is used for signalling the graceful restart.
+ */
+ apr_signal(AP_SIG_GRACEFUL, stop_listening);
+ child_main(mz, slot, bucket);
+ }
+
+ ap_scoreboard_image->parent[slot].bucket = bucket;
+ motorz_note_child_started(mz, slot, pid);
+
+ return 0;
+}
+
+
+/* start up a bunch of children */
+static void startup_children(motorz_core_t *mz, int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
+ if (ap_scoreboard_image->servers[i][0].status != SERVER_DEAD) {
+ continue;
+ }
+ if (make_child(mz, ap_server_conf, i, i % num_buckets) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+static void perform_idle_server_maintenance(motorz_core_t *mz, apr_pool_t *p)
+{
+ static int bucket_make_child_record = -1;
+ static int bucket_kill_child_record = -1;
+ int free_length;
+ int free_slots[1];
+
+ int i;
+ worker_score *ws;
+
+ int active = 0;
+ free_length = 0;
+
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ int status;
+ ws = &ap_scoreboard_image->servers[i][0];
+ status = ws->status;
+ if (status == SERVER_DEAD && !free_length) {
+ free_slots[free_length] = i;
+ free_length++;
+ }
+ if (status >= SERVER_READY) {
+ active++;
+ }
+ }
+ if (active > ap_num_kids) {
+ /* kill off one child... we use the pod because that'll cause it to
+ * shut down gracefully, in case it happened to pick up a request
+ * while we were counting
+ */
+ bucket_kill_child_record = (bucket_kill_child_record + 1) % num_buckets;
+ ap_mpm_pod_signal(all_buckets[bucket_kill_child_record].pod);
+ }
+ else if (active < ap_num_kids) {
+ bucket_make_child_record++;
+ bucket_make_child_record %= num_buckets;
+ make_child(mz, ap_server_conf, free_slots[0],
+ bucket_make_child_record);
+ }
+}
+
+/*****************************************************************
+ * Executive routines.
+ */
+
+static int motorz_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
+{
+ int index;
+ int remaining_children_to_start;
+ int i;
+
+ ap_log_pid(pconf, ap_pid_fname);
+ motorz_core_t *mz = motorz_core_get();
+
+ if (!mz->is_graceful) {
+ if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+ mpm_state = AP_MPMQ_STOPPING;
+ return !OK;
+ }
+ /* fix the generation number in the global score; we just got a new,
+ * cleared scoreboard
+ */
+ ap_scoreboard_image->global->running_generation = mz->my_generation;
+ }
+
+ restart_pending = shutdown_pending = 0;
+ set_signals();
+
+ if (one_process) {
+ AP_MONCONTROL(1);
+ make_child(mz, ap_server_conf, 0, 0);
+ /* NOTREACHED */
+ ap_assert(0);
+ return !OK;
+ }
+
+ /* Don't thrash since num_buckets depends on the
+ * system and the number of online CPU cores...
+ */
+ if (ap_daemons_limit < num_buckets)
+ ap_daemons_limit = num_buckets;
+ if (ap_num_kids < num_buckets)
+ ap_num_kids = num_buckets;
+ if (ap_daemons_min_free < num_buckets)
+ ap_daemons_min_free = num_buckets;
+ if (ap_daemons_max_free < ap_daemons_min_free + num_buckets)
+ ap_daemons_max_free = ap_daemons_min_free + num_buckets;
+
+ /* If we're doing a graceful_restart then we're going to see a lot
+ * of children exiting immediately when we get into the main loop
+ * below (because we just sent them AP_SIG_GRACEFUL). This happens pretty
+ * rapidly... and for each one that exits we'll start a new one until
+ * we reach at least daemons_min_free. But we may be permitted to
+ * start more than that, so we'll just keep track of how many we're
+ * supposed to start up without the 1 second penalty between each fork.
+ */
+ remaining_children_to_start = ap_num_kids;
+ if (remaining_children_to_start > ap_daemons_limit) {
+ remaining_children_to_start = ap_daemons_limit;
+ }
+ if (!mz->is_graceful) {
+ startup_children(mz, remaining_children_to_start);
+ remaining_children_to_start = 0;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO()
+ "%s configured -- resuming normal operations",
+ ap_get_server_description());
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO()
+ "Server built: %s", ap_get_server_built());
+ ap_log_command_line(plog, s);
+ ap_log_common(s);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO()
+ "Accept mutex: %s (default: %s)",
+ (all_buckets[0].mutex)
+ ? apr_proc_mutex_name(all_buckets[0].mutex)
+ : "none",
+ apr_proc_mutex_defname());
+
+ mpm_state = AP_MPMQ_RUNNING;
+
+ while (!restart_pending && !shutdown_pending) {
+ int child_slot;
+ apr_exit_why_e exitwhy;
+ int status, processed_status;
+ /* this is a memory leak, but I'll fix it later. */
+ apr_proc_t pid;
+
+ ap_wait_or_timeout(&exitwhy, &status, &pid, pconf, ap_server_conf);
+
+ /* XXX: if it takes longer than 1 second for all our children
+ * to start up and get into IDLE state then we may spawn an
+ * extra child
+ */
+ if (pid.pid != -1) {
+ processed_status = ap_process_child_status(&pid, exitwhy, status);
+ child_slot = ap_find_child_by_pid(&pid);
+ if (processed_status == APEXIT_CHILDFATAL) {
+ /* fix race condition found in PR 39311
+ * A child created at the same time as a graceful happens
+ * can find the lock missing and create a fatal error.
+ * It is not fatal for the last generation to be in this state.
+ */
+ if (child_slot < 0
+ || ap_get_scoreboard_process(child_slot)->generation
+ == mz->my_generation) {
+ mpm_state = AP_MPMQ_STOPPING;
+ return !OK;
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf, APLOGNO()
+ "Ignoring fatal error in child of previous "
+ "generation (pid %ld).",
+ (long)pid.pid);
+ }
+ }
+
+ /* non-fatal death... note that it's gone in the scoreboard. */
+ if (child_slot >= 0) {
+ (void) ap_update_child_status_from_indexes(child_slot, 0, SERVER_DEAD,
+ (request_rec *) NULL);
+ motorz_note_child_killed(child_slot, 0, 0);
+ if (remaining_children_to_start
+ && child_slot < ap_daemons_limit) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ make_child(mz, ap_server_conf, child_slot,
+ ap_get_scoreboard_process(child_slot)->bucket);
+ --remaining_children_to_start;
+ }
+#if APR_HAS_OTHER_CHILD
+ }
+ else if (apr_proc_other_child_alert(&pid, APR_OC_REASON_DEATH, status) == APR_SUCCESS) {
+ /* handled */
+#endif
+ }
+ else if (mz->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_WARNING,
+ 0, ap_server_conf, APLOGNO()
+ "long lost child came home! (pid %ld)", (long)pid.pid);
+ }
+ /* Don't perform idle maintenance when a child dies,
+ * only do it when there's a timeout. Remember only a
+ * finite number of children can die, and it's pretty
+ * pathological for a lot to die suddenly.
+ */
+ continue;
+ }
+ else if (remaining_children_to_start) {
+ /* we hit a 1 second timeout in which none of the previous
+ * generation of children needed to be reaped... so assume
+ * they're all done, and pick up the slack if any is left.
+ */
+ startup_children(mz, 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(mz, pconf);
+ }
+
+ mpm_state = AP_MPMQ_STOPPING;
+
+ if (shutdown_pending && !mz->is_graceful) {
+ /* Time to shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ if (ap_unixd_killpg(getpgrp(), SIGTERM) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO() "killpg SIGTERM");
+ }
+ ap_reclaim_child_processes(1, /* Start with SIGTERM */
+ motorz_note_child_killed);
+
+ /* cleanup pid file on normal shutdown */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO()
+ "caught SIGTERM, shutting down");
+
+ return DONE;
+ } else if (shutdown_pending) {
+ /* Time to perform a graceful shut down:
+ * Reap the inactive children, and ask the active ones
+ * to close their listeners, then wait until they are
+ * all done to exit.
+ */
+ int active_children;
+ apr_time_t cutoff = 0;
+
+ /* Stop listening */
+ ap_close_listeners();
+
+ /* kill off the idle ones */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_pod_killpg(all_buckets[i].pod, mz->max_daemons_limit);
+ }
+
+ /* Send SIGUSR1 to the active children */
+ active_children = 0;
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
+ /* Ask each child to close its listeners. */
+ ap_mpm_safe_kill(MPM_CHILD_PID(index), AP_SIG_GRACEFUL);
+ active_children++;
+ }
+ }
+
+ /* Allow each child which actually finished to exit */
+ ap_relieve_child_processes(motorz_note_child_killed);
+
+ /* cleanup pid file */
+ ap_remove_pid(pconf, ap_pid_fname);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO()
+ "caught " AP_SIG_GRACEFUL_STOP_STRING ", shutting down gracefully");
+
+ if (ap_graceful_shutdown_timeout) {
+ cutoff = apr_time_now() +
+ apr_time_from_sec(ap_graceful_shutdown_timeout);
+ }
+
+ /* Don't really exit until each child has finished */
+ shutdown_pending = 0;
+ do {
+ /* Pause for a second */
+ sleep(1);
+
+ /* Relieve any children which have now exited */
+ ap_relieve_child_processes(motorz_note_child_killed);
+
+ active_children = 0;
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_mpm_safe_kill(MPM_CHILD_PID(index), 0) == APR_SUCCESS) {
+ active_children = 1;
+ /* Having just one child is enough to stay around */
+ break;
+ }
+ }
+ } while (!shutdown_pending && active_children &&
+ (!ap_graceful_shutdown_timeout || apr_time_now() < cutoff));
+
+ /* We might be here because we received SIGTERM, either
+ * way, try and make sure that all of our processes are
+ * really dead.
+ */
+ ap_unixd_killpg(getpgrp(), SIGTERM);
+
+ return DONE;
+ }
+
+ /* we've been told to restart */
+ apr_signal(SIGHUP, SIG_IGN);
+ apr_signal(AP_SIG_GRACEFUL, SIG_IGN);
+ if (one_process) {
+ /* not worth thinking about */
+ return DONE;
+ }
+
+ /* advance to the next generation */
+ /* XXX: we really need to make sure this new generation number isn't in
+ * use by any of the children.
+ */
+ ++mz->my_generation;
+ ap_scoreboard_image->global->running_generation = mz->my_generation;
+
+ if (mz->is_graceful) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO()
+ "Graceful restart requested, doing restart");
+
+ /* kill off the idle ones */
+ for (i = 0; i < num_buckets; i++) {
+ ap_mpm_pod_killpg(all_buckets[i].pod, mz->max_daemons_limit);
+ }
+
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request. This will break
+ * in a very nasty way if we ever have the scoreboard totally
+ * file-based (no shared memory)
+ */
+ for (index = 0; index < ap_daemons_limit; ++index) {
+ if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
+ ap_scoreboard_image->servers[index][0].status = SERVER_GRACEFUL;
+ /* Ask each child to close its listeners.
+ *
+ * NOTE: we use the scoreboard, because if we send SIGUSR1
+ * to every process in the group, this may include CGI's,
+ * piped loggers, etc. They almost certainly won't handle
+ * it gracefully.
+ */
+ ap_mpm_safe_kill(ap_scoreboard_image->parent[index].pid, AP_SIG_GRACEFUL);
+ }
+ }
+ }
+ else {
+ /* Kill 'em off */
+ if (ap_unixd_killpg(getpgrp(), SIGHUP) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO() "killpg SIGHUP");
+ }
+ ap_reclaim_child_processes(0, /* Not when just starting up */
+ motorz_note_child_killed);
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO()
+ "SIGHUP received. Attempting to restart");
+ }
+
+ return OK;
+}
+
+/* This really should be a post_config hook, but the error log is already
+ * redirected by that point, so we need to do this in the open_logs phase.
+ */
+static int motorz_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+ int level_flags = 0;
+ ap_listen_rec **listen_buckets;
+ apr_status_t rv;
+ char id[16];
+ int i;
+
+ pconf = p;
+ motorz_core_t *mz = motorz_core_get();
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (mz->module_loads == 1) {
+ startup = 1;
+ level_flags |= APLOG_STARTUP;
+ }
+
+ if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT | level_flags, 0,
+ (startup ? NULL : s),
+ "no listening sockets available, shutting down");
+ return DONE;
+ }
+
+ if (one_process) {
+ num_buckets = 1;
+ }
+ else if (!mz->is_graceful) { /* Preserve the number of buckets
+ on graceful restarts. */
+ num_buckets = 0;
+ }
+ if ((rv = ap_duplicate_listeners(pconf, ap_server_conf,
+ &listen_buckets, &num_buckets))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not duplicate listeners");
+ return DONE;
+ }
+ all_buckets = apr_pcalloc(pconf, num_buckets *
+ sizeof(motorz_child_bucket));
+ for (i = 0; i < num_buckets; i++) {
+ if (!one_process && /* no POD in one_process mode */
+ (rv = ap_mpm_pod_open(pconf, &all_buckets[i].pod))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not open pipe-of-death");
+ return DONE;
+ }
+ /* Initialize cross-process accept lock (safe accept needed only) */
+ if ((rv = SAFE_ACCEPT((apr_snprintf(id, sizeof id, "%i", i),
+ ap_proc_mutex_create(&all_buckets[i].mutex,
+ NULL, AP_ACCEPT_MUTEX_TYPE,
+ id, s, pconf, 0))))) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT | level_flags, rv,
+ (startup ? NULL : s),
+ "could not create accept mutex");
+ return DONE;
+ }
+ all_buckets[i].listeners = listen_buckets[i];
+ }
+
+ return OK;
+}
+
+static int motorz_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+ int no_detach, debug, foreground;
+ apr_status_t rv;
+ const char *userdata_key = "mpm_motorz_module";
+ motorz_core_t *mz;
+
+ mpm_state = AP_MPMQ_STARTING;
+
+ debug = ap_exists_config_define("DEBUG");
+
+ if (debug) {
+ foreground = one_process = 1;
+ no_detach = 0;
+ }
+ else
+ {
+ no_detach = ap_exists_config_define("NO_DETACH");
+ one_process = ap_exists_config_define("ONE_PROCESS");
+ foreground = ap_exists_config_define("FOREGROUND");
+ }
+
+ ap_mutex_register(p, AP_ACCEPT_MUTEX_TYPE, NULL, APR_LOCK_DEFAULT, 0);
+
+ /* sigh, want this only the second time around */
+ mz = g_motorz_core = ap_retained_data_get(userdata_key);
+ if (!g_motorz_core) {
+ mz = g_motorz_core = ap_retained_data_create(userdata_key, sizeof(*g_motorz_core));
+ mz->max_daemons_limit = -1;
+ }
+ ++mz->module_loads;
+ if (mz->module_loads == 2) {
+ if (!one_process && !foreground) {
+ /* before we detach, setup crash handlers to log to errorlog */
+ ap_fatal_signal_setup(ap_server_conf, pconf);
+ rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
+ : APR_PROC_DETACH_DAEMONIZE);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL, APLOGNO()
+ "apr_proc_detach failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+ }
+
+ parent_pid = ap_my_pid = getpid();
+ apr_pool_create(&mz->pool, ap_pglobal);
+ apr_pool_tag(mz->pool, "motorz-mpm-core");
+ apr_skiplist_init(&mz->timer_ring, mz->pool);
+ apr_skiplist_set_compare(mz->timer_ring, indexing_comp, indexing_compk);
+ apr_thread_mutex_create(&mz->mtx, 0, mz->pool);
+
+ ap_listen_pre_config();
+ ap_num_kids = DEFAULT_START_DAEMON;
+ ap_daemons_min_free = DEFAULT_MIN_FREE_DAEMON;
+ ap_daemons_max_free = DEFAULT_MAX_FREE_DAEMON;
+ server_limit = DEFAULT_SERVER_LIMIT;
+ ap_daemons_limit = server_limit;
+ ap_extended_status = 0;
+
+ return OK;
+}
+
+static int motorz_check_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ int startup = 0;
+ motorz_core_t *mz = motorz_core_get();
+
+ /* the reverse of pre_config, we want this only the first time around */
+ if (mz->module_loads == 1) {
+ startup = 1;
+ }
+
+ if (server_limit > MAX_SERVER_LIMIT) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO()
+ "WARNING: ServerLimit of %d exceeds compile-time "
+ "limit of", server_limit);
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
+ " %d servers, decreasing to %d.",
+ MAX_SERVER_LIMIT, MAX_SERVER_LIMIT);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "ServerLimit of %d exceeds compile-time limit "
+ "of %d, decreasing to match",
+ server_limit, MAX_SERVER_LIMIT);
+ }
+ server_limit = MAX_SERVER_LIMIT;
+ }
+ else if (server_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO()
+ "WARNING: ServerLimit of %d not allowed, "
+ "increasing to 1.", server_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "ServerLimit of %d not allowed, increasing to 1",
+ server_limit);
+ }
+ server_limit = 1;
+ }
+
+ /* you cannot change ServerLimit across a restart; ignore
+ * any such attempts
+ */
+ if (!mz->first_server_limit) {
+ mz->first_server_limit = server_limit;
+ }
+ else if (server_limit != mz->first_server_limit) {
+ /* don't need a startup console version here */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "changing ServerLimit to %d from original value of %d "
+ "not allowed during restart",
+ server_limit, mz->first_server_limit);
+ server_limit = mz->first_server_limit;
+ }
+
+ if (ap_daemons_limit > server_limit) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO()
+ "WARNING: MaxRequestWorkers of %d exceeds ServerLimit "
+ "value of", ap_daemons_limit);
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
+ " %d servers, decreasing MaxRequestWorkers to %d.",
+ server_limit, server_limit);
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
+ " To increase, please see the ServerLimit "
+ "directive.");
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "MaxRequestWorkers of %d exceeds ServerLimit value "
+ "of %d, decreasing to match",
+ ap_daemons_limit, server_limit);
+ }
+ ap_daemons_limit = server_limit;
+ }
+ else if (ap_daemons_limit < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO()
+ "WARNING: MaxRequestWorkers of %d not allowed, "
+ "increasing to 1.", ap_daemons_limit);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "MaxRequestWorkers of %d not allowed, increasing to 1",
+ ap_daemons_limit);
+ }
+ ap_daemons_limit = 1;
+ }
+
+ /* ap_num_kids > ap_daemons_limit checked in motorz_run() */
+ if (ap_num_kids < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO()
+ "WARNING: StartServers of %d not allowed, "
+ "increasing to 1.", ap_num_kids);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "StartServers of %d not allowed, increasing to 1",
+ ap_num_kids);
+ }
+ ap_num_kids = 1;
+ }
+
+ if (ap_daemons_min_free < 1) {
+ if (startup) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO()
+ "WARNING: MinSpareServers of %d not allowed, "
+ "increasing to 1", ap_daemons_min_free);
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
+ " to avoid almost certain server failure.");
+ ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL,
+ " Please read the documentation.");
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO()
+ "MinSpareServers of %d not allowed, increasing to 1",
+ ap_daemons_min_free);
+ }
+ ap_daemons_min_free = 1;
+ }
+
+ /* ap_daemons_max_free < ap_daemons_min_free + 1 checked in motorz_run() */
+
+ return OK;
+}
+
+static void motorz_hooks(apr_pool_t *p)
+{
+ /* Our open_logs hook function must run before the core's, or stderr
+ * will be redirected to a file, and the messages won't print to the
+ * console.
+ */
+ static const char *const aszSucc[] = {"core.c", NULL};
+ ap_force_set_tz(p);
+
+ ap_hook_open_logs(motorz_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST);
+ /* we need to set the MPM state before other pre-config hooks use MPM query
+ * to retrieve it, so register as REALLY_FIRST
+ */
+ ap_hook_pre_config(motorz_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+ ap_hook_check_config(motorz_check_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm(motorz_run, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_query(motorz_query, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_mpm_get_name(motorz_get_name, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_num_kids = atoi(arg);
+ return NULL;
+}
+
+static const char *set_max_clients (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+ if (!strcasecmp(cmd->cmd->name, "MaxClients")) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL, APLOGNO()
+ "MaxClients is deprecated, use MaxRequestWorkers "
+ "instead.");
+ }
+ ap_daemons_limit = atoi(arg);
+ return NULL;
+}
+
+static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ server_limit = atoi(arg);
+ return NULL;
+}
+
+static const char *set_threads_per_child(cmd_parms * cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ threads_per_child = atoi(arg);
+ return NULL;
+}
+
+static const command_rec motorz_cmds[] = {
+LISTEN_COMMANDS,
+AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
+ "Number of child processes launched at server startup"),
+AP_INIT_TAKE1("MaxClients", set_max_clients, NULL, RSRC_CONF,
+ "Deprecated name of MaxRequestWorkers"),
+AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
+ "Maximum value of MaxRequestWorkers for this run of Apache"),
+AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
+ "Number of threads each child creates"),
+AP_GRACEFUL_SHUTDOWN_TIMEOUT_COMMAND,
+{ NULL }
+};
+
+AP_DECLARE_MODULE(mpm_motorz) = {
+ MPM20_MODULE_STUFF,
+ NULL, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ motorz_cmds, /* command apr_table_t */
+ motorz_hooks, /* register hooks */
+};
projects / thirdparty / apache / httpd.git / commitdiff
