| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * Portions of this software are based upon public domain software |
| * originally written at the National Center for Supercomputing Applications, |
| * University of Illinois, Urbana-Champaign. |
| */ |
| |
| #define CORE_PRIVATE |
| |
| #include "ap_config.h" |
| #include "apr_strings.h" |
| #include "apr_portable.h" |
| #include "apr_file_io.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 "unixd.h" |
| #include "mpm_common.h" |
| #include "iol_socket.h" |
| #include "ap_listen.h" |
| #include "mpm_default.h" |
| #include "mpm.h" |
| #include "scoreboard.h" |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #include <poll.h> |
| #ifdef HAVE_SYS_SOCKET_H |
| #include <sys/socket.h> |
| #endif |
| #ifdef HAVE_NETINET_TCP_H |
| #include <netinet/tcp.h> |
| #endif |
| #include <pthread.h> |
| #include <signal.h> |
| |
| /* |
| * Actual definitions of config globals |
| */ |
| |
| static int threads_to_start = 0; /* Worker threads per child */ |
| static int min_spare_threads = 0; |
| static int max_spare_threads = 0; |
| static int max_threads = 0; |
| static int max_requests_per_child = 0; |
| static const char *ap_pid_fname=NULL; |
| API_VAR_EXPORT const char *ap_scoreboard_fname=NULL; |
| static int num_daemons=0; |
| static int workers_may_exit = 0; |
| static int requests_this_child; |
| static int num_listenfds = 0; |
| static ap_socket_t **listenfds; |
| |
| struct ap_ctable ap_child_table[HARD_SERVER_LIMIT]; |
| |
| /* |
| * The max child slot ever assigned, preserved across restarts. Necessary |
| * to deal with NumServers changes across SIGWINCH restarts. We use this |
| * value to optimize routines that have to scan the entire child table. |
| * |
| * XXX - It might not be worth keeping this code in. There aren't very |
| * many child processes in this MPM. |
| */ |
| int ap_max_daemons_limit = -1; |
| |
| char ap_coredump_dir[MAX_STRING_LEN]; |
| |
| static ap_file_t *pipe_of_death_in = NULL; |
| static ap_file_t *pipe_of_death_out = NULL; |
| static pthread_mutex_t pipe_of_death_mutex; |
| |
| /* *Non*-shared http_main globals... */ |
| |
| server_rec *ap_server_conf; |
| |
| /* one_process --- debugging mode variable; can be set from the command line |
| * with the -X flag. If set, this gets you the child_main loop running |
| * in the process which originally started up (no detach, no make_child), |
| * which is a pretty nice debugging environment. (You'll get a SIGHUP |
| * early in standalone_main; just continue through. This is the server |
| * trying to kill off any child processes which it might have lying |
| * around --- Apache doesn't keep track of their pids, it just sends |
| * SIGHUP to the process group, ignoring it in the root process. |
| * Continue through and you'll be fine.). |
| */ |
| |
| static int one_process = 0; |
| |
| #ifdef DEBUG_SIGSTOP |
| int raise_sigstop_flags; |
| #endif |
| |
| static ap_pool_t *pconf; /* Pool for config stuff */ |
| static ap_pool_t *pchild; /* Pool for httpd child stuff */ |
| static ap_pool_t *thread_pool_parent; /* Parent of per-thread pools */ |
| static pthread_mutex_t thread_pool_parent_mutex; |
| |
| static int child_num; |
| static unsigned int my_pid; /* Linux getpid() doesn't work except in |
| main thread. Use this instead */ |
| /* Keep track of the number of worker threads currently active */ |
| static int worker_thread_count; |
| static pthread_mutex_t worker_thread_count_mutex; |
| static int worker_thread_free_ids[HARD_THREAD_LIMIT]; |
| static pthread_attr_t worker_thread_attr; |
| |
| /* Keep track of the number of idle worker threads */ |
| static int idle_thread_count; |
| static pthread_mutex_t idle_thread_count_mutex; |
| |
| /* Locks for accept serialization */ |
| #ifdef NO_SERIALIZED_ACCEPT |
| #define SAFE_ACCEPT(stmt) APR_SUCCESS |
| #else |
| #define SAFE_ACCEPT(stmt) (stmt) |
| static ap_lock_t *process_accept_mutex; |
| #endif /* NO_SERIALIZED_ACCEPT */ |
| static const char *lock_fname; |
| static pthread_mutex_t thread_accept_mutex = PTHREAD_MUTEX_INITIALIZER; |
| |
| API_EXPORT(int) ap_get_max_daemons(void) |
| { |
| return ap_max_daemons_limit; |
| } |
| |
| /* a clean exit from a child with proper cleanup */ |
| static void clean_child_exit(int code) |
| { |
| if (pchild) { |
| ap_destroy_pool(pchild); |
| } |
| exit(code); |
| } |
| |
| /* handle all varieties of core dumping signals */ |
| static void sig_coredump(int sig) |
| { |
| chdir(ap_coredump_dir); |
| ap_signal(sig, SIG_DFL); |
| kill(getpid(), sig); |
| /* At this point we've got sig blocked, because we're still inside |
| * the signal handler. When we leave the signal handler it will |
| * be unblocked, and we'll take the signal... and coredump or whatever |
| * is appropriate for this particular Unix. In addition the parent |
| * will see the real signal we received -- whereas if we called |
| * abort() here, the parent would only see SIGABRT. |
| */ |
| } |
| |
| static void just_die(int sig) |
| { |
| clean_child_exit(0); |
| } |
| |
| /***************************************************************** |
| * Connection structures and accounting... |
| */ |
| |
| /* volatile just in case */ |
| static int volatile shutdown_pending; |
| static int volatile restart_pending; |
| static int volatile is_graceful; |
| |
| /* |
| * ap_start_shutdown() and ap_start_restart(), below, are a first stab at |
| * functions to initiate shutdown or restart without relying on signals. |
| * Previously this was initiated in sig_term() and restart() signal handlers, |
| * but we want to be able to start a shutdown/restart from other sources -- |
| * e.g. on Win32, from the service manager. Now the service manager can |
| * call ap_start_shutdown() or ap_start_restart() as appropiate. Note that |
| * these functions can also be called by the child processes, since global |
| * variables are no longer used to pass on the required action to the parent. |
| * |
| * These should only be called from the parent process itself, since the |
| * parent process will use the shutdown_pending and restart_pending variables |
| * to determine whether to shutdown or restart. The child process should |
| * call signal_parent() directly to tell the parent to die -- this will |
| * cause neither of those variable to be set, which the parent will |
| * assume means something serious is wrong (which it will be, for the |
| * child to force an exit) and so do an exit anyway. |
| */ |
| |
| void ap_start_shutdown(void) |
| { |
| if (shutdown_pending == 1) { |
| /* Um, is this _probably_ not an error, if the user has |
| * tried to do a shutdown twice quickly, so we won't |
| * worry about reporting it. |
| */ |
| return; |
| } |
| shutdown_pending = 1; |
| } |
| |
| /* do a graceful restart if graceful == 1 */ |
| void ap_start_restart(int graceful) |
| { |
| |
| if (restart_pending == 1) { |
| /* Probably not an error - don't bother reporting it */ |
| return; |
| } |
| restart_pending = 1; |
| is_graceful = graceful; |
| } |
| |
| static void sig_term(int sig) |
| { |
| ap_start_shutdown(); |
| } |
| |
| static void restart(int sig) |
| { |
| #ifndef WIN32 |
| ap_start_restart(sig == SIGWINCH); |
| #else |
| ap_start_restart(1); |
| #endif |
| } |
| |
| static void set_signals(void) |
| { |
| #ifndef NO_USE_SIGACTION |
| struct sigaction sa; |
| |
| sigemptyset(&sa.sa_mask); |
| sa.sa_flags = 0; |
| |
| if (!one_process) { |
| sa.sa_handler = sig_coredump; |
| #if defined(SA_ONESHOT) |
| sa.sa_flags = SA_ONESHOT; |
| #elif defined(SA_RESETHAND) |
| sa.sa_flags = SA_RESETHAND; |
| #endif |
| if (sigaction(SIGSEGV, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)"); |
| #ifdef SIGBUS |
| if (sigaction(SIGBUS, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)"); |
| #endif |
| #ifdef SIGABORT |
| if (sigaction(SIGABORT, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABORT)"); |
| #endif |
| #ifdef SIGABRT |
| if (sigaction(SIGABRT, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)"); |
| #endif |
| #ifdef SIGILL |
| if (sigaction(SIGILL, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)"); |
| #endif |
| sa.sa_flags = 0; |
| } |
| sa.sa_handler = sig_term; |
| if (sigaction(SIGTERM, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)"); |
| #ifdef SIGINT |
| if (sigaction(SIGINT, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)"); |
| #endif |
| #ifdef SIGXCPU |
| sa.sa_handler = SIG_DFL; |
| if (sigaction(SIGXCPU, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)"); |
| #endif |
| #ifdef SIGXFSZ |
| sa.sa_handler = SIG_DFL; |
| if (sigaction(SIGXFSZ, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)"); |
| #endif |
| #ifdef SIGPIPE |
| sa.sa_handler = SIG_IGN; |
| if (sigaction(SIGPIPE, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)"); |
| #endif |
| |
| /* we want to ignore HUPs and WINCH while we're busy processing one */ |
| sigaddset(&sa.sa_mask, SIGHUP); |
| sigaddset(&sa.sa_mask, SIGWINCH); |
| sa.sa_handler = restart; |
| if (sigaction(SIGHUP, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)"); |
| if (sigaction(SIGWINCH, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGWINCH)"); |
| #else |
| if (!one_process) { |
| ap_signal(SIGSEGV, sig_coredump); |
| #ifdef SIGBUS |
| ap_signal(SIGBUS, sig_coredump); |
| #endif /* SIGBUS */ |
| #ifdef SIGABORT |
| ap_signal(SIGABORT, sig_coredump); |
| #endif /* SIGABORT */ |
| #ifdef SIGABRT |
| ap_signal(SIGABRT, sig_coredump); |
| #endif /* SIGABRT */ |
| #ifdef SIGILL |
| ap_signal(SIGILL, sig_coredump); |
| #endif /* SIGILL */ |
| #ifdef SIGXCPU |
| ap_signal(SIGXCPU, SIG_DFL); |
| #endif /* SIGXCPU */ |
| #ifdef SIGXFSZ |
| ap_signal(SIGXFSZ, SIG_DFL); |
| #endif /* SIGXFSZ */ |
| } |
| |
| ap_signal(SIGTERM, sig_term); |
| #ifdef SIGHUP |
| ap_signal(SIGHUP, restart); |
| #endif /* SIGHUP */ |
| #ifdef SIGWINCH |
| ap_signal(SIGWINCH, restart); |
| #endif /* SIGWINCH */ |
| #ifdef SIGPIPE |
| ap_signal(SIGPIPE, SIG_IGN); |
| #endif /* SIGPIPE */ |
| |
| #endif |
| } |
| |
| /***************************************************************** |
| * Here follows a long bunch of generic server bookkeeping stuff... |
| */ |
| |
| int ap_graceful_stop_signalled(void) |
| { |
| /* XXX - Does this really work? - Manoj */ |
| return is_graceful; |
| } |
| |
| /***************************************************************** |
| * Child process main loop. |
| */ |
| |
| static void process_socket(ap_pool_t *p, ap_socket_t *sock, long conn_id) |
| { |
| BUFF *conn_io; |
| conn_rec *current_conn; |
| ap_iol *iol; |
| int csd; |
| ap_status_t rv; |
| |
| if ((rv = ap_get_os_sock(&csd, sock)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, "ap_get_os_sock"); |
| } |
| |
| if (csd >= FD_SETSIZE) { |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, NULL, |
| "new file descriptor %d is too large; you probably need " |
| "to rebuild Apache with a larger FD_SETSIZE " |
| "(currently %d)", |
| csd, FD_SETSIZE); |
| ap_close_socket(sock); |
| return; |
| } |
| |
| ap_sock_disable_nagle(csd); |
| iol = ap_iol_attach_socket(p, sock); |
| conn_io = ap_bcreate(p, B_RDWR); |
| ap_bpush_iol(conn_io, iol); |
| |
| current_conn = ap_new_apr_connection(p, ap_server_conf, conn_io, sock, |
| conn_id); |
| |
| ap_process_connection(current_conn); |
| ap_lingering_close(current_conn); |
| } |
| |
| static void *worker_thread(void *); |
| |
| /* Starts a thread as long as we're below max_threads */ |
| static int start_thread(void) |
| { |
| pthread_t thread; |
| |
| pthread_mutex_lock(&worker_thread_count_mutex); |
| if (worker_thread_count < max_threads) { |
| if (pthread_create(&thread, &worker_thread_attr, worker_thread, |
| &worker_thread_free_ids[worker_thread_count])) { |
| ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, |
| "pthread_create: unable to create worker thread"); |
| /* In case system resources are maxxed out, we don't want |
| Apache running away with the CPU trying to fork over and |
| over and over again if we exit. */ |
| sleep(10); |
| workers_may_exit = 1; |
| pthread_mutex_unlock(&worker_thread_count_mutex); |
| return 0; |
| } |
| else { |
| worker_thread_count++; |
| } |
| } |
| else { |
| static int reported = 0; |
| |
| if (!reported) { |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, ap_server_conf, |
| "server reached MaxThreadsPerChild setting, consider raising the" |
| " MaxThreadsPerChild or NumServers settings"); |
| reported = 1; |
| } |
| pthread_mutex_unlock(&worker_thread_count_mutex); |
| return 0; |
| } |
| pthread_mutex_unlock(&worker_thread_count_mutex); |
| return 1; |
| |
| } |
| /* Sets workers_may_exit if we received a character on the pipe_of_death */ |
| static void check_pipe_of_death(void) |
| { |
| pthread_mutex_lock(&pipe_of_death_mutex); |
| if (!workers_may_exit) { |
| int ret; |
| char pipe_read_char; |
| ap_ssize_t n = 1; |
| |
| ret = ap_recv(listenfds[0], &pipe_read_char, &n); |
| if (ap_canonical_error(ret) == APR_EAGAIN) { |
| /* It lost the lottery. It must continue to suffer |
| * through a life of servitude. */ |
| } |
| else { |
| /* It won the lottery (or something else is very |
| * wrong). Embrace death with open arms. */ |
| workers_may_exit = 1; |
| } |
| } |
| pthread_mutex_unlock(&pipe_of_death_mutex); |
| } |
| |
| /* idle_thread_count should be incremented before starting a worker_thread */ |
| |
| static void *worker_thread(void *arg) |
| { |
| ap_socket_t *csd = NULL; |
| ap_pool_t *tpool; /* Pool for this thread */ |
| ap_pool_t *ptrans; /* Pool for per-transaction stuff */ |
| ap_socket_t *sd = NULL; |
| int srv; |
| int curr_pollfd, last_pollfd = 0; |
| int thread_just_started = 1; |
| int thread_num = *((int *) arg); |
| long conn_id = child_num * HARD_THREAD_LIMIT + thread_num; |
| ap_pollfd_t *pollset; |
| int n; |
| ap_status_t rv; |
| |
| pthread_mutex_lock(&thread_pool_parent_mutex); |
| ap_create_pool(&tpool, thread_pool_parent); |
| pthread_mutex_unlock(&thread_pool_parent_mutex); |
| ap_create_pool(&ptrans, tpool); |
| |
| ap_setup_poll(&pollset, num_listenfds+1, tpool); |
| for(n=0 ; n <= num_listenfds ; ++n) |
| ap_add_poll_socket(pollset, listenfds[n], APR_POLLIN); |
| |
| while (!workers_may_exit) { |
| workers_may_exit |= (max_requests_per_child != 0) && (requests_this_child <= 0); |
| if (workers_may_exit) break; |
| if (!thread_just_started) { |
| pthread_mutex_lock(&idle_thread_count_mutex); |
| if (idle_thread_count < max_spare_threads) { |
| idle_thread_count++; |
| pthread_mutex_unlock(&idle_thread_count_mutex); |
| } |
| else { |
| pthread_mutex_unlock(&idle_thread_count_mutex); |
| break; |
| } |
| } |
| else { |
| thread_just_started = 0; |
| } |
| pthread_mutex_lock(&thread_accept_mutex); |
| if (workers_may_exit) { |
| pthread_mutex_unlock(&thread_accept_mutex); |
| break; |
| } |
| if ((rv = SAFE_ACCEPT(ap_lock(process_accept_mutex))) |
| != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, |
| "ap_lock failed. Attempting to shutdown " |
| "process gracefully."); |
| workers_may_exit = 1; |
| } |
| |
| while (!workers_may_exit) { |
| ap_int16_t event; |
| srv = ap_poll(pollset, &n, -1); |
| |
| if (srv != APR_SUCCESS) { |
| if (ap_canonical_error(srv) == APR_EINTR) { |
| continue; |
| } |
| |
| /* ap_poll() will only return errors in catastrophic |
| * circumstances. Let's try exiting gracefully, for now. */ |
| ap_log_error(APLOG_MARK, APLOG_ERR, srv, (const server_rec *) |
| ap_server_conf, "ap_poll: (listen)"); |
| workers_may_exit = 1; |
| } |
| if (workers_may_exit) break; |
| |
| ap_get_revents(&event, listenfds[0], pollset); |
| if (event & APR_POLLIN) { |
| /* A process got a signal on the shutdown pipe. Check if we're |
| * the lucky process to die. */ |
| check_pipe_of_death(); |
| continue; |
| } |
| |
| if (num_listenfds == 1) { |
| sd = ap_listeners->sd; |
| goto got_fd; |
| } |
| else { |
| /* find a listener */ |
| curr_pollfd = last_pollfd; |
| do { |
| curr_pollfd++; |
| if (curr_pollfd > num_listenfds) { |
| curr_pollfd = 1; |
| } |
| /* XXX: Should we check for POLLERR? */ |
| ap_get_revents(&event, listenfds[curr_pollfd], pollset); |
| if (event & APR_POLLIN) { |
| last_pollfd = curr_pollfd; |
| sd = listenfds[curr_pollfd]; |
| goto got_fd; |
| } |
| } while (curr_pollfd != last_pollfd); |
| } |
| } |
| got_fd: |
| if (!workers_may_exit) { |
| if ((rv = ap_accept(&csd, sd, ptrans)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, "ap_accept"); |
| } |
| if ((rv = SAFE_ACCEPT(ap_unlock(process_accept_mutex))) |
| != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, |
| "ap_unlock failed. Attempting to shutdown " |
| "process gracefully."); |
| workers_may_exit = 1; |
| } |
| pthread_mutex_unlock(&thread_accept_mutex); |
| pthread_mutex_lock(&idle_thread_count_mutex); |
| if (idle_thread_count > min_spare_threads) { |
| idle_thread_count--; |
| } |
| else { |
| if (!start_thread()) { |
| idle_thread_count--; |
| } |
| } |
| pthread_mutex_unlock(&idle_thread_count_mutex); |
| process_socket(ptrans, csd, conn_id); |
| requests_this_child--; |
| } else { |
| if ((rv = SAFE_ACCEPT(ap_unlock(process_accept_mutex))) |
| != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, |
| "ap_unlock failed. Attempting to shutdown " |
| "process gracefully."); |
| workers_may_exit = 1; |
| } |
| pthread_mutex_unlock(&thread_accept_mutex); |
| pthread_mutex_lock(&idle_thread_count_mutex); |
| idle_thread_count--; |
| pthread_mutex_unlock(&idle_thread_count_mutex); |
| break; |
| } |
| ap_clear_pool(ptrans); |
| } |
| |
| pthread_mutex_lock(&thread_pool_parent_mutex); |
| ap_destroy_pool(tpool); |
| pthread_mutex_unlock(&thread_pool_parent_mutex); |
| pthread_mutex_lock(&worker_thread_count_mutex); |
| worker_thread_count--; |
| worker_thread_free_ids[worker_thread_count] = thread_num; |
| if (worker_thread_count == 0) { |
| /* All the threads have exited, now finish the shutdown process |
| * by signalling the sigwait thread */ |
| kill(my_pid, SIGTERM); |
| } |
| pthread_mutex_unlock(&worker_thread_count_mutex); |
| |
| return NULL; |
| } |
| |
| static void child_main(int child_num_arg) |
| { |
| sigset_t sig_mask; |
| int signal_received; |
| int i; |
| ap_listen_rec *lr; |
| ap_status_t rv; |
| |
| my_pid = getpid(); |
| child_num = child_num_arg; |
| ap_create_pool(&pchild, pconf); |
| |
| /*stuff to do before we switch id's, so we have permissions.*/ |
| |
| rv = SAFE_ACCEPT(ap_child_init_lock(&process_accept_mutex, lock_fname, |
| pchild)); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, |
| "Couldn't initialize cross-process lock in child"); |
| clean_child_exit(APEXIT_CHILDFATAL); |
| } |
| |
| if (unixd_setup_child()) { |
| clean_child_exit(APEXIT_CHILDFATAL); |
| } |
| |
| ap_child_init_hook(pchild, ap_server_conf); |
| |
| /*done with init critical section */ |
| |
| /* All threads should mask signals out, accoring to sigwait(2) man page */ |
| sigfillset(&sig_mask); |
| |
| #ifdef SIGPROCMASK_SETS_THREAD_MASK |
| if (sigprocmask(SIG_SETMASK, &sig_mask, NULL) != 0) { |
| ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, "sigprocmask"); |
| } |
| #else |
| if (pthread_sigmask(SIG_SETMASK, &sig_mask, NULL) != 0) { |
| ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, |
| "pthread_sigmask"); |
| } |
| #endif |
| |
| requests_this_child = max_requests_per_child; |
| |
| /* Set up the pollfd array */ |
| listenfds = ap_pcalloc(pchild, sizeof(*listenfds) * (num_listenfds + 1)); |
| #if APR_FILES_AS_SOCKETS |
| ap_socket_from_file(&listenfds[0], pipe_of_death_in); |
| #endif |
| for (lr = ap_listeners, i = 1; i <= num_listenfds; lr = lr->next, ++i) |
| listenfds[i]=lr->sd; |
| |
| /* Setup worker threads */ |
| |
| if (threads_to_start > max_threads) { |
| threads_to_start = max_threads; |
| } |
| idle_thread_count = threads_to_start; |
| worker_thread_count = 0; |
| for (i = 0; i < max_threads; i++) { |
| worker_thread_free_ids[i] = i; |
| } |
| ap_create_pool(&thread_pool_parent, pchild); |
| pthread_mutex_init(&thread_pool_parent_mutex, NULL); |
| pthread_mutex_init(&idle_thread_count_mutex, NULL); |
| pthread_mutex_init(&worker_thread_count_mutex, NULL); |
| pthread_mutex_init(&pipe_of_death_mutex, NULL); |
| pthread_attr_init(&worker_thread_attr); |
| #ifdef PTHREAD_ATTR_SETDETACHSTATE_ARG2_ADDR |
| { |
| int on = 1; |
| |
| pthread_attr_setdetachstate(&worker_thread_attr, &on); |
| } |
| #else |
| pthread_attr_setdetachstate(&worker_thread_attr, PTHREAD_CREATE_DETACHED); |
| #endif |
| |
| /* We are creating worker threads right now */ |
| for (i=0; i < threads_to_start; i++) { |
| /* start_thread shouldn't fail here */ |
| if (!start_thread()) { |
| break; |
| } |
| } |
| |
| /* This thread will be the one responsible for handling signals */ |
| sigemptyset(&sig_mask); |
| sigaddset(&sig_mask, SIGTERM); |
| sigaddset(&sig_mask, SIGINT); |
| ap_sigwait(&sig_mask, &signal_received); |
| switch (signal_received) { |
| case SIGTERM: |
| case SIGINT: |
| just_die(signal_received); |
| break; |
| default: |
| ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, |
| "received impossible signal: %d", signal_received); |
| just_die(SIGTERM); |
| } |
| } |
| |
| static int make_child(server_rec *s, int slot, time_t now) |
| { |
| int pid; |
| |
| if (slot + 1 > ap_max_daemons_limit) { |
| ap_max_daemons_limit = slot + 1; |
| } |
| |
| if (one_process) { |
| set_signals(); |
| ap_child_table[slot].pid = getpid(); |
| ap_child_table[slot].status = SERVER_ALIVE; |
| child_main(slot); |
| } |
| |
| if ((pid = fork()) == -1) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, |
| "fork: Unable to fork new process"); |
| /* In case system resources are maxxed out, we don't want |
| Apache running away with the CPU trying to fork over and |
| over and over again. */ |
| sleep(10); |
| |
| return -1; |
| } |
| |
| if (!pid) { |
| #ifdef AIX_BIND_PROCESSOR |
| /* By default, AIX binds to a single processor. This bit unbinds |
| children which will then bind to another CPU. |
| */ |
| #include <sys/processor.h> |
| int status = bindprocessor(BINDPROCESS, (int)getpid(), |
| PROCESSOR_CLASS_ANY); |
| if (status != OK) |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, |
| ap_server_conf, "processor unbind failed %d", status); |
| #endif |
| |
| RAISE_SIGSTOP(MAKE_CHILD); |
| |
| /* XXX - For an unthreaded server, a signal handler will be necessary |
| ap_signal(SIGTERM, just_die); |
| */ |
| child_main(slot); |
| |
| return 0; |
| } |
| /* else */ |
| ap_child_table[slot].pid = pid; |
| ap_child_table[slot].status = SERVER_ALIVE; |
| |
| return 0; |
| } |
| |
| /* start up a bunch of children */ |
| static int startup_children(int number_to_start) |
| { |
| int i; |
| |
| for (i = 0; number_to_start && i < num_daemons; ++i) { |
| if (ap_child_table[i].status != SERVER_DEAD) { |
| continue; |
| } |
| if (make_child(ap_server_conf, i, 0) < 0) { |
| break; |
| } |
| --number_to_start; |
| } |
| return number_to_start; |
| } |
| |
| |
| /* |
| * spawn_rate is the number of children that will be spawned on the |
| * next maintenance cycle if there aren't enough servers. It is |
| * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by |
| * without the need to spawn. |
| */ |
| static int spawn_rate = 1; |
| #ifndef MAX_SPAWN_RATE |
| #define MAX_SPAWN_RATE (32) |
| #endif |
| static int hold_off_on_exponential_spawning; |
| |
| static void perform_child_maintenance(void) |
| { |
| int i; |
| time_t now = 0; |
| int free_length; |
| int free_slots[MAX_SPAWN_RATE]; |
| int last_non_dead = -1; |
| |
| /* initialize the free_list */ |
| free_length = 0; |
| |
| for (i = 0; i < num_daemons; ++i) { |
| if (ap_child_table[i].status == SERVER_DEAD) { |
| if (free_length < spawn_rate) { |
| free_slots[free_length] = i; |
| ++free_length; |
| } |
| } |
| else { |
| last_non_dead = i; |
| } |
| |
| if (i >= ap_max_daemons_limit && free_length >= spawn_rate) { |
| break; |
| } |
| } |
| ap_max_daemons_limit = last_non_dead + 1; |
| |
| if (free_length > 0) { |
| for (i = 0; i < free_length; ++i) { |
| make_child(ap_server_conf, free_slots[i], now); |
| } |
| /* the next time around we want to spawn twice as many if this |
| * wasn't good enough, but not if we've just done a graceful |
| */ |
| if (hold_off_on_exponential_spawning) { |
| --hold_off_on_exponential_spawning; |
| } |
| else if (spawn_rate < MAX_SPAWN_RATE) { |
| spawn_rate *= 2; |
| } |
| } |
| else { |
| spawn_rate = 1; |
| } |
| } |
| |
| static void server_main_loop(int remaining_children_to_start) |
| { |
| int child_slot; |
| ap_wait_t status; |
| ap_proc_t pid; |
| int i; |
| |
| while (!restart_pending && !shutdown_pending) { |
| ap_wait_or_timeout(&status, &pid, pconf); |
| |
| if (pid.pid != -1) { |
| ap_process_child_status(&pid, status); |
| /* non-fatal death... note that it's gone in the child table and |
| * clean out the status table. */ |
| child_slot = -1; |
| for (i = 0; i < ap_max_daemons_limit; ++i) { |
| if (ap_child_table[i].pid == pid.pid) { |
| int j; |
| |
| child_slot = i; |
| for (j = 0; j < HARD_THREAD_LIMIT; j++) { |
| ap_perchild_force_reset_connection_status(i * HARD_THREAD_LIMIT + j); |
| } |
| break; |
| } |
| } |
| if (child_slot >= 0) { |
| ap_child_table[child_slot].status = SERVER_DEAD; |
| |
| if (remaining_children_to_start |
| && child_slot < num_daemons) { |
| /* we're still doing a 1-for-1 replacement of dead |
| * children with new children |
| */ |
| make_child(ap_server_conf, child_slot, time(NULL)); |
| --remaining_children_to_start; |
| } |
| #if APR_HAS_OTHER_CHILD |
| } |
| else if (ap_reap_other_child(&pid, status) == 0) { |
| /* handled */ |
| #endif |
| } |
| else if (is_graceful) { |
| /* Great, we've probably just lost a slot in the |
| * child table. Somehow we don't know about this |
| * child. |
| */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, |
| ap_server_conf, |
| "long lost child came home! (pid %ld)", |
| (long)pid.pid); |
| } |
| /* Don't perform idle maintenance when a child dies, |
| * only do it when there's a timeout. Remember only a |
| * finite number of children can die, and it's pretty |
| * pathological for a lot to die suddenly. |
| */ |
| continue; |
| } |
| else if (remaining_children_to_start) { |
| /* we hit a 1 second timeout in which none of the previous |
| * generation of children needed to be reaped... so assume |
| * they're all done, and pick up the slack if any is left. |
| */ |
| remaining_children_to_start = \ |
| startup_children(remaining_children_to_start); |
| /* In any event we really shouldn't do the code below because |
| * few of the servers we just started are in the IDLE state |
| * yet, so we'd mistakenly create an extra server. |
| */ |
| continue; |
| } |
| |
| perform_child_maintenance(); |
| } |
| } |
| |
| int ap_mpm_run(ap_pool_t *_pconf, ap_pool_t *plog, server_rec *s) |
| { |
| int remaining_children_to_start; |
| int i; |
| ap_status_t rv; |
| ap_ssize_t one = 1; |
| |
| pconf = _pconf; |
| ap_server_conf = s; |
| if ((rv = ap_create_pipe(&pipe_of_death_in, &pipe_of_death_out, pconf)) |
| != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, |
| (const server_rec*) ap_server_conf, |
| "ap_create_pipe (pipe_of_death)"); |
| exit(1); |
| } |
| if ((rv = ap_set_pipe_timeout(pipe_of_death_in, 0)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, |
| (const server_rec*) ap_server_conf, |
| "ap_set_pipe_timeout (pipe_of_death)"); |
| exit(1); |
| } |
| ap_server_conf = s; |
| if ((num_listenfds = ap_setup_listeners(ap_server_conf)) < 1) { |
| /* XXX: hey, what's the right way for the mpm to indicate a fatal error? */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, 0, s, |
| "no listening sockets available, shutting down"); |
| return 1; |
| } |
| ap_log_pid(pconf, ap_pid_fname); |
| |
| /* Initialize cross-process accept lock */ |
| lock_fname = ap_psprintf(_pconf, "%s.%u", |
| ap_server_root_relative(_pconf, lock_fname), |
| my_pid); |
| rv = SAFE_ACCEPT(ap_create_lock(&process_accept_mutex, APR_MUTEX, |
| APR_CROSS_PROCESS, lock_fname, _pconf)); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, |
| "Couldn't create cross-process lock"); |
| return 1; |
| } |
| |
| if (!is_graceful) { |
| reinit_scoreboard(pconf); |
| } |
| /* Initialize the child table */ |
| if (!is_graceful) { |
| for (i = 0; i < HARD_SERVER_LIMIT; i++) { |
| ap_child_table[i].status = SERVER_DEAD; |
| } |
| } |
| |
| set_signals(); |
| |
| /* If we're doing a graceful_restart then we're going to see a lot |
| * of children exiting immediately when we get into the main loop |
| * below (because we just sent them SIGWINCH). This happens pretty |
| * rapidly... and for each one that exits we'll start a new one until |
| * we reach at least daemons_min_free. But we may be permitted to |
| * start more than that, so we'll just keep track of how many we're |
| * supposed to start up without the 1 second penalty between each fork. |
| */ |
| remaining_children_to_start = num_daemons; |
| if (!is_graceful) { |
| remaining_children_to_start = \ |
| startup_children(remaining_children_to_start); |
| } |
| else { |
| /* give the system some time to recover before kicking into |
| * exponential mode */ |
| hold_off_on_exponential_spawning = 10; |
| } |
| |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf, |
| "%s configured -- resuming normal operations", |
| ap_get_server_version()); |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, ap_server_conf, |
| "Server built: %s", ap_get_server_built()); |
| restart_pending = shutdown_pending = 0; |
| |
| server_main_loop(remaining_children_to_start); |
| |
| if (shutdown_pending) { |
| /* Time to gracefully shut down: |
| * Kill child processes, tell them to call child_exit, etc... |
| */ |
| if (unixd_killpg(getpgrp(), SIGTERM) < 0) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, |
| "killpg SIGTERM"); |
| } |
| ap_reclaim_child_processes(1); /* Start with SIGTERM */ |
| |
| /* cleanup pid file on normal shutdown */ |
| { |
| const char *pidfile = NULL; |
| pidfile = ap_server_root_relative (pconf, ap_pid_fname); |
| if ( pidfile != NULL && unlink(pidfile) == 0) |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, |
| ap_server_conf, |
| "removed PID file %s (pid=%ld)", |
| pidfile, (long)getpid()); |
| } |
| |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, |
| ap_server_conf, "caught SIGTERM, shutting down"); |
| |
| return 1; |
| } |
| |
| /* we've been told to restart */ |
| ap_signal(SIGHUP, SIG_IGN); |
| |
| if (one_process) { |
| /* not worth thinking about */ |
| return 1; |
| } |
| |
| if (is_graceful) { |
| char char_of_death = '!'; |
| |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf, |
| "SIGWINCH received. Doing graceful restart"); |
| |
| /* This is mostly for debugging... so that we know what is still |
| * gracefully dealing with existing request. |
| */ |
| |
| for (i = 0; i < num_daemons; ++i) { |
| if (ap_child_table[i].status != SERVER_DEAD) { |
| ap_child_table[i].status = SERVER_DYING; |
| } |
| } |
| /* give the children the signal to die */ |
| for (i = 0; i < num_daemons;) { |
| if ((rv = ap_write(pipe_of_death_out, &char_of_death, &one)) != APR_SUCCESS) { |
| if (ap_canonical_error(rv) == APR_EINTR) continue; |
| ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, |
| "write pipe_of_death"); |
| } |
| i++; |
| } |
| } |
| else { |
| /* Kill 'em all. Since the child acts the same on the parents SIGTERM |
| * and a SIGHUP, we may as well use the same signal, because some user |
| * pthreads are stealing signals from us left and right. |
| */ |
| if (unixd_killpg(getpgrp(), SIGTERM) < 0) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, |
| "killpg SIGTERM"); |
| } |
| ap_reclaim_child_processes(1); /* Start with SIGTERM */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, |
| ap_server_conf, "SIGHUP received. Attempting to restart"); |
| } |
| return 0; |
| } |
| |
| static void perchild_pre_config(ap_pool_t *p, ap_pool_t *plog, ap_pool_t *ptemp) |
| { |
| static int restart_num = 0; |
| |
| one_process = !!getenv("ONE_PROCESS"); |
| |
| /* sigh, want this only the second time around */ |
| if (restart_num++ == 1) { |
| is_graceful = 0; |
| |
| if (!one_process) { |
| ap_detach(); |
| } |
| |
| my_pid = getpid(); |
| } |
| |
| unixd_pre_config(); |
| ap_listen_pre_config(); |
| num_daemons = DEFAULT_NUM_DAEMON; |
| threads_to_start = DEFAULT_START_THREAD; |
| min_spare_threads = DEFAULT_MIN_SPARE_THREAD; |
| max_spare_threads = DEFAULT_MAX_SPARE_THREAD; |
| max_threads = HARD_THREAD_LIMIT; |
| ap_pid_fname = DEFAULT_PIDLOG; |
| ap_scoreboard_fname = DEFAULT_SCOREBOARD; |
| lock_fname = DEFAULT_LOCKFILE; |
| max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD; |
| ap_perchild_set_maintain_connection_status(1); |
| |
| ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir)); |
| } |
| |
| static void perchild_hooks(void) |
| { |
| INIT_SIGLIST() |
| one_process = 0; |
| |
| ap_hook_pre_config(perchild_pre_config, NULL, NULL, AP_HOOK_MIDDLE); |
| } |
| |
| static const char *set_pidfile(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| if (cmd->server->is_virtual) { |
| return "PidFile directive not allowed in <VirtualHost>"; |
| } |
| ap_pid_fname = arg; |
| return NULL; |
| } |
| |
| static const char *set_scoreboard(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_scoreboard_fname = arg; |
| return NULL; |
| } |
| |
| static const char *set_lockfile(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| lock_fname = arg; |
| return NULL; |
| } |
| static const char *set_num_daemons (cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| num_daemons = atoi(arg); |
| if (num_daemons > HARD_SERVER_LIMIT) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: NumServers of %d exceeds compile time limit " |
| "of %d servers,", num_daemons, HARD_SERVER_LIMIT); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| " lowering NumServers to %d. To increase, please " |
| "see the", HARD_SERVER_LIMIT); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| " HARD_SERVER_LIMIT define in %s.", |
| AP_MPM_HARD_LIMITS_FILE); |
| num_daemons = HARD_SERVER_LIMIT; |
| } |
| else if (num_daemons < 1) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: Require NumServers > 0, setting to 1"); |
| num_daemons = 1; |
| } |
| return NULL; |
| } |
| |
| static const char *set_threads_to_start (cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| threads_to_start = atoi(arg); |
| if (threads_to_start > HARD_THREAD_LIMIT) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: StartThreads of %d exceeds compile time" |
| " limit of %d threads,", threads_to_start, |
| HARD_THREAD_LIMIT); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| " lowering StartThreads to %d. To increase, please" |
| " see the", HARD_THREAD_LIMIT); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| " HARD_THREAD_LIMIT define in %s.", |
| AP_MPM_HARD_LIMITS_FILE); |
| } |
| else if (threads_to_start < 1) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: Require StartThreads > 0, setting to 1"); |
| threads_to_start = 1; |
| } |
| return NULL; |
| } |
| |
| static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| min_spare_threads = atoi(arg); |
| if (min_spare_threads <= 0) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: detected MinSpareThreads set to non-positive."); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "Resetting to 1 to avoid almost certain Apache failure."); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "Please read the documentation."); |
| min_spare_threads = 1; |
| } |
| |
| return NULL; |
| } |
| |
| static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| max_spare_threads = atoi(arg); |
| if (max_spare_threads >= HARD_THREAD_LIMIT) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: detected MinSpareThreads set higher than"); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "HARD_THREAD_LIMIT. Resetting to %d", HARD_THREAD_LIMIT); |
| max_spare_threads = HARD_THREAD_LIMIT; |
| } |
| return NULL; |
| } |
| |
| static const char *set_max_threads(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| max_threads = atoi(arg); |
| if (max_threads > HARD_THREAD_LIMIT) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: detected MaxThreadsPerChild set higher than"); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "HARD_THREAD_LIMIT. Resetting to %d", HARD_THREAD_LIMIT); |
| max_threads = HARD_THREAD_LIMIT; |
| } |
| return NULL; |
| } |
| |
| static const char *set_max_requests(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| max_requests_per_child = atoi(arg); |
| |
| return NULL; |
| } |
| |
| static const char *set_maintain_connection_status(cmd_parms *cmd, |
| void *dummy, int arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_perchild_set_maintain_connection_status(arg != 0); |
| return NULL; |
| } |
| |
| static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| ap_finfo_t finfo; |
| const char *fname; |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| fname = ap_server_root_relative(cmd->pool, arg); |
| if ((ap_stat(&finfo, fname, cmd->pool) != APR_SUCCESS) || |
| (finfo.filetype != APR_DIR)) { |
| return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname, |
| " does not exist or is not a directory", NULL); |
| } |
| ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir)); |
| return NULL; |
| } |
| static const char *set_childprocess(cmd_parms *cmd, void *dummy, const char *arg) |
| { |
| } |
| /* |
| if (unlink(sconf->sockname) < 0 && |
| errno != ENOENT) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, |
| "Couldn't unlink unix domain socket %s", |
| sconf->sockname); |
| /* just a warning; don't bail out |
| } |
| |
| if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, |
| "Couldn't create unix domain socket"); |
| return errno; |
| } |
| |
| memset(&unix_addr, 0, sizeof(unix_addr)); |
| unix_addr.sun_family = AF_UNIX; |
| strcpy(unix_addr.sun_path, sconf->sockname); |
| |
| omask = umask(0077); /* so that only Apache can use socket |
| rc = bind(sd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)); |
| */ |
| |
| |
| |
| |
| |
| |
| static const command_rec perchild_cmds[] = { |
| UNIX_DAEMON_COMMANDS |
| LISTEN_COMMANDS |
| AP_INIT_TAKE1("PidFile", set_pidfile, NULL, RSRC_CONF, |
| "A file for logging the server process ID"), |
| AP_INIT_TAKE1("ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, |
| "A file for Apache to maintain runtime process management information"), |
| AP_INIT_TAKE1("LockFile", set_lockfile, NULL, RSRC_CONF, |
| "The lockfile used when Apache needs to lock the accept() call"), |
| AP_INIT_TAKE1("NumServers", set_num_daemons, NULL, RSRC_CONF, |
| "Number of children alive at the same time"), |
| AP_INIT_TAKE1("StartThreads", set_threads_to_start, NULL, RSRC_CONF, |
| "Number of threads each child creates"), |
| AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF, |
| "Minimum number of idle threads per child, to handle request spikes"), |
| AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF, |
| "Maximum number of idle threads per child"), |
| AP_INIT_TAKE1("MaxThreadsPerChild", set_max_threads, NULL, RSRC_CONF, |
| "Maximum number of threads per child"), |
| AP_INIT_TAKE1("MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, |
| "Maximum number of requests a particular child serves before dying."), |
| AP_INIT_FLAG("ConnectionStatus", set_maintain_connection_status, NULL, RSRC_CONF, |
| "Whether or not to maintain status information on current connections"), |
| AP_INIT_TAKE1("CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, |
| "The location of the directory Apache changes to before dumping core"), |
| AP_INIT_TAKE1("ChildProcess", set_childprocess, NULL, RSRC_CONF, |
| "Which child process is responsible for serving this virtual host"), |
| { NULL } |
| }; |
| |
| module MODULE_VAR_EXPORT mpm_perchild_module = { |
| 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 */ |
| perchild_cmds, /* command ap_table_t */ |
| NULL, /* handlers */ |
| perchild_hooks /* register_hooks */ |
| }; |
| |
