| /* ==================================================================== |
| * 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. |
| */ |
| |
| /* The new BeOS MPM! |
| * |
| * This one basically is a single process multi threaded model, but |
| * I couldn't be bothered adding the spmt_ to the front of the name! |
| * Anyway, this is still under development so it isn't yet the default |
| * choice. |
| */ |
| |
| #define CORE_PRIVATE |
| |
| #include "apr_portable.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 "beosd.h" |
| #include "iol_socket.h" |
| #include "ap_listen.h" |
| #include "scoreboard.h" |
| //#include "poll.h" |
| #include "mpm_common.h" |
| #include "mpm.h" |
| #include <unistd.h> |
| #include <sys/socket.h> |
| |
| /* |
| * Actual definitions of config globals |
| */ |
| |
| int ap_threads_per_child=0; /* Worker threads per child */ |
| int ap_max_requests_per_child=0; |
| static char *ap_pid_fname=NULL; |
| static char *ap_scoreboard_fname=NULL; |
| static int ap_threads_to_start=0; |
| static int min_spare_threads=0; |
| static int max_spare_threads=0; |
| static int ap_thread_limit=0; |
| static time_t ap_restart_time=0; |
| API_VAR_EXPORT int ap_extended_status = 0; |
| static int num_listening_sockets = 0; /* set by open_listeners in ap_mpm_run */ |
| static ap_socket_t ** listening_sockets; |
| ap_lock_t *accept_mutex = NULL; |
| |
| static ap_pool_t *pconf; /* Pool for config stuff */ |
| static ap_pool_t *pchild; /* Pool for httpd child stuff */ |
| |
| static int server_pid; |
| |
| /* Keep track of the number of worker threads currently active */ |
| static int worker_thread_count; |
| ap_lock_t *worker_thread_count_mutex; |
| |
| /* The structure used to pass unique initialization info to each thread */ |
| typedef struct { |
| int slot; |
| ap_pool_t *tpool; |
| } proc_info; |
| |
| struct ap_ctable ap_child_table[HARD_SERVER_LIMIT]; |
| |
| /* |
| * The max child slot ever assigned, preserved across restarts. Necessary |
| * to deal with MaxClients changes across SIGWINCH restarts. We use this |
| * value to optimize routines that have to scan the entire scoreboard. |
| */ |
| int ap_max_child_assigned = -1; |
| int ap_max_threads_limit = -1; |
| static char ap_coredump_dir[MAX_STRING_LEN]; |
| |
| /* shared http_main globals... */ |
| |
| server_rec *ap_server_conf; |
| |
| /* one_process */ |
| /* TODO - get this working again... */ |
| static int one_process = 0; |
| |
| #ifdef DEBUG_SIGSTOP |
| int raise_sigstop_flags; |
| #endif |
| |
| API_EXPORT(const server_rec *) ap_get_server_conf(void) |
| { |
| return (ap_server_conf); |
| } |
| |
| API_EXPORT(int) ap_get_max_daemons(void) |
| { |
| return ap_max_child_assigned; |
| } |
| |
| /* a clean exit from a child with proper cleanup |
| static void clean_child_exit(int code) __attribute__ ((noreturn)); */ |
| void clean_child_exit(int code) |
| { |
| if (pchild) |
| ap_destroy_pool(pchild); |
| exit(code); |
| } |
| |
| /* handle all varieties of core dumping signals */ |
| static void sig_coredump(int sig) |
| { |
| chdir(ap_coredump_dir); |
| signal(sig, SIG_DFL); |
| kill(server_pid, 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. |
| */ |
| } |
| |
| /***************************************************************** |
| * 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) |
| { |
| ap_start_restart(sig == SIGWINCH); |
| } |
| |
| static void tell_workers_to_exit() |
| { |
| int i, code = 99; |
| |
| for (i=0;i<ap_max_child_assigned;i++) { |
| if (ap_child_table[i].status != SERVER_DEAD) |
| send_data(ap_child_table[i].pid, code, NULL, 0); |
| |
| } |
| } |
| |
| static void push_workers_off_cliff(int sig) |
| { |
| int i; |
| |
| for (i=0;i<ap_max_child_assigned;i++) |
| kill(ap_child_table[i].pid, sig); |
| } |
| |
| static void set_signals(void) |
| { |
| struct sigaction sa; |
| |
| sigemptyset(&sa.sa_mask); |
| sa.sa_flags = 0; |
| |
| if (!one_process) { |
| sa.sa_handler = sig_coredump; |
| |
| if (sigaction(SIGSEGV, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)"); |
| if (sigaction(SIGBUS, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)"); |
| if (sigaction(SIGABRT, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)"); |
| if (sigaction(SIGILL, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)"); |
| 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)"); |
| if (sigaction(SIGINT, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)"); |
| |
| sa.sa_handler = SIG_IGN; |
| if (sigaction(SIGPIPE, &sa, NULL) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)"); |
| |
| /* 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)"); |
| } |
| |
| static void process_child_status(int pid, ap_wait_t status) |
| { |
| /* Child died... if it died due to a fatal error, |
| * we should simply bail out. |
| */ |
| if ((WIFEXITED(status)) && |
| WEXITSTATUS(status) == APEXIT_CHILDFATAL) { |
| ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, errno, ap_server_conf, |
| "Child %d returned a Fatal error... \n" |
| "Apache is exiting!", |
| pid); |
| exit(APEXIT_CHILDFATAL); |
| } |
| if (WIFSIGNALED(status)) { |
| switch (WTERMSIG(status)) { |
| case SIGTERM: |
| case SIGHUP: |
| case SIGUSR1: |
| case SIGKILL: |
| break; |
| default: |
| #ifdef SYS_SIGLIST |
| #ifdef WCOREDUMP |
| if (WCOREDUMP(status)) { |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, |
| errno, ap_server_conf, |
| "child pid %d exit signal %s (%d), " |
| "possible coredump in %s", |
| pid, (WTERMSIG(status) >= NumSIG) ? "" : |
| SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status), |
| ap_coredump_dir); |
| } |
| else { |
| #endif |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, |
| errno, ap_server_conf, |
| "child pid %d exit signal %s (%d)", pid, |
| SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status)); |
| #ifdef WCOREDUMP |
| } |
| #endif |
| #else |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, |
| errno, ap_server_conf, |
| "child pid %d exit signal %d", |
| pid, WTERMSIG(status)); |
| #endif |
| } |
| } |
| } |
| |
| static int setup_listeners(server_rec *s) |
| { |
| ap_listen_rec *lr; |
| int num_listeners = 0; |
| if (ap_listen_open(s->process, s->port)) { |
| return 0; |
| } |
| for (lr = ap_listeners; lr; lr = lr->next) { |
| num_listeners++; |
| } |
| return num_listeners; |
| } |
| |
| /***************************************************************** |
| * Here follows a long bunch of generic server bookkeeping stuff... |
| */ |
| |
| //#define sock_disable_nagle(s) /* NOOP */ |
| |
| 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, int my_child_num) |
| { |
| BUFF *conn_io; |
| conn_rec *current_conn; |
| ap_iol *iol; |
| long conn_id = my_child_num; |
| int csd; |
| |
| iol = beos_attach_socket(sock); |
| if (iol == NULL) { |
| if (errno == EBADF) { |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, NULL, |
| "filedescriptor (%u) larger than FD_SETSIZE (%u) " |
| "found, you probably need to rebuild Apache with a " |
| "larger FD_SETSIZE", csd, FD_SETSIZE); |
| } |
| else { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, NULL, |
| "error attaching to socket"); |
| } |
| ap_close_socket(sock); |
| return; |
| } |
| |
| 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 int32 worker_thread(void * dummy) |
| { |
| proc_info * ti = dummy; |
| int child_slot = ti->slot; |
| ap_pool_t *tpool = ti->tpool; |
| ap_socket_t *csd = NULL; |
| ap_pool_t *ptrans; /* Pool for per-transaction stuff */ |
| ap_socket_t *sd = NULL; |
| int srv , n; |
| int curr_pollfd, last_pollfd = 0; |
| sigset_t sig_mask; |
| int requests_this_child = ap_max_requests_per_child; |
| ap_pollfd_t *pollset; |
| /* each worker thread is in control of it's own destiny...*/ |
| int this_worker_should_exit = 0; |
| thread_id me = find_thread(NULL); |
| |
| free(ti); |
| |
| /* block the signals for this thread */ |
| sigfillset(&sig_mask); |
| sigprocmask(SIG_BLOCK, &sig_mask, NULL); |
| |
| ap_create_pool(&ptrans, tpool); |
| |
| ap_lock(worker_thread_count_mutex); |
| worker_thread_count++; |
| ap_unlock(worker_thread_count_mutex); |
| |
| /* now setup our own pollset...this will use APR woohoo! */ |
| ap_setup_poll(&pollset, num_listening_sockets, tpool); |
| for(n=0 ; n < num_listening_sockets ; ++n) |
| ap_add_poll_socket(pollset, listening_sockets[n], APR_POLLIN); |
| |
| while (!this_worker_should_exit) { |
| this_worker_should_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0); |
| |
| if (this_worker_should_exit) break; |
| |
| ap_lock(accept_mutex); |
| while (!this_worker_should_exit) { |
| ap_int16_t event; |
| ap_status_t ret = ap_poll(pollset, &srv, -1); |
| |
| if (has_data(me)) { |
| thread_id sender; |
| receive_data(&sender, NULL, 0); |
| this_worker_should_exit = 1; |
| } |
| if (ret != APR_SUCCESS) { |
| if (errno == EINTR) { |
| continue; |
| } |
| |
| /* poll() will only return errors in catastrophic |
| * circumstances. Let's try exiting gracefully, for now. */ |
| ap_log_error(APLOG_MARK, APLOG_ERR,errno, (const server_rec *) |
| ap_get_server_conf(), "poll: (listen)"); |
| this_worker_should_exit = 1; |
| } |
| |
| if (this_worker_should_exit) break; |
| |
| if (num_listening_sockets == 1) { |
| sd = ap_listeners->sd; |
| goto got_fd; |
| } |
| else { |
| /* find a listener */ |
| curr_pollfd = last_pollfd; |
| do { |
| curr_pollfd++; |
| if (curr_pollfd > num_listening_sockets) { |
| curr_pollfd = 1; |
| } |
| /* Get the revent... */ |
| ap_get_revents(&event, listening_sockets[curr_pollfd], pollset); |
| |
| /* XXX: Should we check for POLLERR? */ |
| if (event & APR_POLLIN) { |
| last_pollfd = curr_pollfd; |
| sd = listening_sockets[curr_pollfd]; |
| goto got_fd; |
| } |
| } while (curr_pollfd != last_pollfd); |
| } |
| } |
| got_fd: |
| if (!this_worker_should_exit) { |
| ap_accept(&csd, sd, ptrans); |
| ap_unlock(accept_mutex); |
| process_socket(ptrans, csd, child_slot); |
| requests_this_child--; |
| } |
| else { |
| ap_unlock(accept_mutex); |
| break; |
| } |
| ap_clear_pool(ptrans); |
| } |
| |
| ap_destroy_pool(tpool); |
| ap_lock(worker_thread_count_mutex); |
| worker_thread_count--; |
| if (worker_thread_count == 0) { |
| /* All the threads have exited, now finish the shutdown process |
| * by signalling the sigwait thread */ |
| kill(server_pid, SIGTERM); |
| } |
| ap_unlock(worker_thread_count_mutex); |
| |
| return (0); |
| } |
| |
| static int make_worker(server_rec *s, int slot, time_t now) |
| { |
| thread_id tid; |
| proc_info *my_info = (proc_info *)malloc(sizeof(proc_info)); |
| |
| if (my_info == NULL) { |
| ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf, |
| "malloc: out of memory"); |
| clean_child_exit(APEXIT_CHILDFATAL); |
| } |
| |
| my_info->slot = slot; |
| ap_create_pool(&my_info->tpool, pchild); |
| |
| if (slot + 1 > ap_max_child_assigned) |
| ap_max_child_assigned = slot + 1; |
| |
| /* TODO: figure out the one_process stuff... */ |
| /* |
| if (one_process) { |
| set_signals(); |
| ap_child_table[slot].pid = getpid(); |
| ap_child_table[slot].status = SERVER_ALIVE; |
| } |
| This is deliberate to remind me to do something about it! |
| */ |
| |
| tid = spawn_thread(worker_thread, "apache_worker", B_NORMAL_PRIORITY, |
| my_info); |
| if (tid < B_NO_ERROR) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, |
| "spawn_thread: Unable to start a new 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. */ |
| sleep(10); |
| |
| return -1; |
| } |
| resume_thread(tid); |
| |
| ap_child_table[slot].pid = getpid(); |
| ap_child_table[slot].status = SERVER_ALIVE; |
| return 0; |
| } |
| |
| /* start up a bunch of children */ |
| static void startup_threads(int number_to_start) |
| { |
| int i; |
| |
| for (i = 0; number_to_start && i < ap_thread_limit; ++i) { |
| if (ap_child_table[i].status != SERVER_DEAD) { |
| continue; |
| } |
| if (make_worker(ap_server_conf, i, 0) < 0) { |
| break; |
| } |
| --number_to_start; |
| } |
| } |
| |
| |
| /* |
| * spawn_rate is the number of children that will be spawned on the |
| * next maintenance cycle if there aren't enough idle servers. It is |
| * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by |
| * without the need to spawn. |
| */ |
| static int spawn_rate = 1; |
| #ifndef MAX_SPAWN_RATE |
| #define MAX_SPAWN_RATE (32) |
| #endif |
| static int hold_off_on_exponential_spawning; |
| |
| static void perform_idle_server_maintenance(void) |
| { |
| int i; |
| time_t now = 0; |
| int free_length; |
| int free_slots[MAX_SPAWN_RATE]; |
| int last_non_dead; |
| |
| /* initialize the free_list */ |
| free_length = 0; |
| |
| for (i = 0; i < ap_thread_limit; ++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_child_assigned && free_length >= spawn_rate) { |
| break; |
| } |
| } |
| ap_max_child_assigned = last_non_dead + 1; |
| |
| if (free_length > 0) { |
| for (i = 0; i < free_length; ++i) { |
| make_worker(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_threads_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 >= 0) { |
| process_child_status(pid.pid, status); |
| /* non-fatal death... note that it's gone in the scoreboard. */ |
| child_slot = -1; |
| for (i = 0; i < ap_max_child_assigned; ++i) { |
| if (ap_child_table[i].pid == pid.pid) { |
| int j; |
| |
| child_slot = i; |
| for (j = 0; j < HARD_THREAD_LIMIT; j++) { |
| ap_beos_force_reset_connection_status(i * HARD_THREAD_LIMIT + j); |
| } |
| break; |
| } |
| } |
| if (child_slot >= 0) { |
| ap_child_table[child_slot].status = SERVER_DEAD; |
| |
| if (remaining_threads_to_start |
| && child_slot < ap_thread_limit) { |
| /* we're still doing a 1-for-1 replacement of dead |
| * children with new children |
| */ |
| make_worker(ap_server_conf, child_slot, time(NULL)); |
| --remaining_threads_to_start; |
| } |
| #ifdef 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 |
| * scoreboard. Somehow we don't know about this |
| * child. |
| */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, ap_server_conf, |
| "long lost child came home! (pid %ld)", 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_threads_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_threads(remaining_threads_to_start); |
| remaining_threads_to_start = 0; |
| /* In any event we really shouldn't do the code below because |
| * few of the servers we just started are in the IDLE state |
| * yet, so we'd mistakenly create an extra server. |
| */ |
| continue; |
| } |
| |
| perform_idle_server_maintenance(); |
| } |
| } |
| |
| int ap_mpm_run(ap_pool_t *_pconf, ap_pool_t *plog, server_rec *s) |
| { |
| int remaining_threads_to_start, i; |
| ap_status_t rv; |
| ap_listen_rec *lr; |
| pconf = _pconf; |
| ap_server_conf = s; |
| |
| if ((num_listening_sockets = 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, errno, s, |
| "no listening sockets available, shutting down"); |
| return 1; |
| } |
| |
| ap_log_pid(pconf, ap_pid_fname); |
| |
| /* |
| * Create our locks... |
| */ |
| |
| /* accept_mutex |
| * used to lock around select so we only have one thread |
| * in select at a time |
| */ |
| if ((rv = ap_create_lock(&accept_mutex, APR_MUTEX, APR_CROSS_PROCESS, |
| NULL, pconf)) != APR_SUCCESS) { |
| /* tsch tsch, can't have more than one thread in the accept loop |
| at a time so we need to fall on our sword... */ |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, |
| "Couldn't create accept lock"); |
| return 1; |
| } |
| /* worker_thread_count_mutex |
| * locks the worker_thread_count so we have ana ccurate count... |
| */ |
| if ((rv = ap_create_lock(&worker_thread_count_mutex, APR_MUTEX, APR_CROSS_PROCESS, |
| NULL, pconf)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, |
| "Couldn't create worker thread count lock"); |
| return 1; |
| } |
| |
| /* |
| * Startup/shutdown... |
| */ |
| |
| if (!is_graceful) |
| reinit_scoreboard(pconf); |
| |
| set_signals(); |
| /* Sanity cehcks to avoid thrashing... */ |
| if (max_spare_threads < min_spare_threads ) |
| max_spare_threads = min_spare_threads; |
| |
| /* If we're doing a graceful_restart then we're going to see a lot |
| * of threads 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 threads_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_threads_to_start = ap_threads_to_start; |
| /* sanity check on the number to start... */ |
| if (remaining_threads_to_start > ap_thread_limit) { |
| remaining_threads_to_start = ap_thread_limit; |
| } |
| |
| /* setup the child pool to use for the workers. Each worker creates |
| * a seperate pool of it's own to use. |
| */ |
| ap_create_pool(&pchild, pconf); |
| ap_child_init_hook(pchild, ap_server_conf); |
| |
| /* Now that we have the child pool (pchild) we can allocate |
| * the listenfds and creat the pollset... |
| */ |
| listening_sockets = ap_palloc(pchild, |
| sizeof(*listening_sockets) * (num_listening_sockets)); |
| for (lr = ap_listeners, i = 0; i < num_listening_sockets; lr = lr->next, ++i) |
| listening_sockets[i]=lr->sd; |
| |
| /* we assume all goes OK...hmm might want to check that! */ |
| if (!is_graceful) { |
| startup_threads(remaining_threads_to_start); |
| remaining_threads_to_start = 0; |
| } |
| else { |
| /* give the system some time to recover before kicking into |
| * exponential mode */ |
| hold_off_on_exponential_spawning = 10; |
| } |
| |
| /* |
| * record that we've entered the world ! |
| */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf, |
| "%s configured -- resuming normal operations", |
| ap_get_server_version()); |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, errno, ap_server_conf, |
| "Server built: %s", ap_get_server_built()); |
| restart_pending = shutdown_pending = 0; |
| |
| /* |
| * main_loop until it's all over |
| */ |
| server_main_loop(remaining_threads_to_start); |
| |
| /* |
| * If we get here we're shutting down... |
| */ |
| if (shutdown_pending) { |
| /* Time to gracefully shut down: |
| * Kill child processes, tell them to call child_exit, etc... |
| */ |
| if (beosd_killpg(getpgrp(), SIGTERM) < 0) |
| ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, |
| "killpg 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, |
| errno, ap_server_conf, |
| "removed PID file %s (pid=%ld)", |
| pidfile, (long)getpid()); |
| } |
| |
| /* use ap_reclaim_child_processes starting with SIGTERM */ |
| ap_reclaim_child_processes(1); |
| |
| /* record the shutdown in the log */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf, |
| "caught SIGTERM, shutting down"); |
| |
| return 1; |
| } |
| |
| /* we've been told to restart */ |
| signal(SIGHUP, SIG_IGN); |
| |
| if (one_process) { |
| return 1; |
| } |
| |
| if (is_graceful) { |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf, |
| "SIGWINCH received. Doing graceful restart"); |
| tell_workers_to_exit(); |
| /* TODO - need to test some ideas here... */ |
| } |
| 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. |
| */ |
| push_workers_off_cliff(SIGTERM); |
| |
| ap_reclaim_child_processes(1); /* Start with SIGTERM */ |
| ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf, |
| "SIGHUP received. Attempting to restart"); |
| } |
| |
| if (!is_graceful) { |
| ap_restart_time = time(NULL); |
| } |
| |
| return 0; |
| } |
| |
| static void beos_pre_config(ap_pool_t *pconf, 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) |
| beosd_detach(); |
| server_pid = getpid(); |
| } |
| |
| beosd_pre_config(); |
| ap_listen_pre_config(); |
| ap_threads_to_start = DEFAULT_START_THREADS; |
| min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD; |
| max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD; |
| ap_thread_limit = HARD_SERVER_LIMIT; |
| ap_threads_per_child = DEFAULT_THREADS_PER_CHILD; |
| ap_pid_fname = DEFAULT_PIDLOG; |
| ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD; |
| ap_beos_set_maintain_connection_status(1); |
| |
| ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir)); |
| } |
| |
| static void beos_hooks(void) |
| { |
| INIT_SIGLIST() |
| one_process = 0; |
| |
| ap_hook_pre_config(beos_pre_config, NULL, NULL, AP_HOOK_MIDDLE); |
| } |
| |
| |
| static const char *set_pidfile(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| if (cmd->server->is_virtual) { |
| return "PidFile directive not allowed in <VirtualHost>"; |
| } |
| ap_pid_fname = arg; |
| return NULL; |
| } |
| |
| static const char *set_scoreboard(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_scoreboard_fname = arg; |
| return NULL; |
| } |
| |
| static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_threads_to_start = atoi(arg); |
| return NULL; |
| } |
| |
| static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy, 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, 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_server_limit (cmd_parms *cmd, void *dummy, char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_thread_limit = atoi(arg); |
| if (ap_thread_limit > HARD_SERVER_LIMIT) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: MaxClients of %d exceeds compile time limit " |
| "of %d servers,", ap_thread_limit, HARD_SERVER_LIMIT); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| " lowering MaxClients 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 src/include/httpd.h."); |
| ap_thread_limit = HARD_SERVER_LIMIT; |
| } |
| else if (ap_thread_limit < 1) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: Require MaxClients > 0, setting to 1"); |
| ap_thread_limit = 1; |
| } |
| return NULL; |
| } |
| |
| static const char *set_threads_per_child (cmd_parms *cmd, void *dummy, char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_threads_per_child = atoi(arg); |
| if (ap_threads_per_child > HARD_THREAD_LIMIT) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: ThreadsPerChild of %d exceeds compile time" |
| "limit of %d threads,\n", ap_threads_per_child, |
| HARD_THREAD_LIMIT); |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| " lowering ThreadsPerChild 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 src/include/httpd.h."); |
| } |
| else if (ap_threads_per_child < 1) { |
| ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, |
| "WARNING: Require ThreadsPerChild > 0, setting to 1"); |
| ap_threads_per_child = 1; |
| } |
| return NULL; |
| } |
| |
| static const char *set_max_requests(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_max_requests_per_child = atoi(arg); |
| |
| return NULL; |
| } |
| |
| static const char *set_maintain_connection_status(cmd_parms *cmd, |
| core_dir_config *d, int arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ap_beos_set_maintain_connection_status(arg != 0); |
| return NULL; |
| } |
| |
| static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, 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 command_rec beos_cmds[] = { |
| UNIX_DAEMON_COMMANDS |
| LISTEN_COMMANDS |
| { "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1, |
| "A file for logging the server process ID"}, |
| { "ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, TAKE1, |
| "A file for Apache to maintain runtime process management information"}, |
| { "StartServers", set_daemons_to_start, NULL, RSRC_CONF, TAKE1, |
| "Number of child processes launched at server startup" }, |
| { "MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF, TAKE1, |
| "Minimum number of idle children, to handle request spikes" }, |
| { "MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF, TAKE1, |
| "Maximum number of idle children" }, |
| { "MaxClients", set_server_limit, NULL, RSRC_CONF, TAKE1, |
| "Maximum number of children alive at the same time" }, |
| { "ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF, TAKE1, |
| "Number of threads each child creates" }, |
| { "MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, TAKE1, |
| "Maximum number of requests a particular child serves before dying." }, |
| { "ConnectionStatus", set_maintain_connection_status, NULL, RSRC_CONF, FLAG, |
| "Whether or not to maintain status information on current connections"}, |
| { "CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, TAKE1, |
| "The location of the directory Apache changes to before dumping core" }, |
| { NULL } |
| }; |
| |
| module MODULE_VAR_EXPORT mpm_beos_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 */ |
| beos_cmds, /* command ap_table_t */ |
| NULL, /* handlers */ |
| beos_hooks /* register_hooks */ |
| }; |
| |
