diff options
Diffstat (limited to 'server/mpm/experimental/perchild/perchild.c')
| -rw-r--r-- | server/mpm/experimental/perchild/perchild.c | 1829 |
1 files changed, 0 insertions, 1829 deletions
diff --git a/server/mpm/experimental/perchild/perchild.c b/server/mpm/experimental/perchild/perchild.c deleted file mode 100644 index 0fa14997b1..0000000000 --- a/server/mpm/experimental/perchild/perchild.c +++ /dev/null @@ -1,1829 +0,0 @@ -/* ==================================================================== - * The Apache Software License, Version 1.1 - * - * Copyright (c) 2000-2001 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. - */ - -#include "apr_hash.h" -#include "apr_strings.h" -#include "apr_pools.h" -#include "apr_portable.h" -#include "apr_file_io.h" -#include "apr_signal.h" - -#define APR_WANT_IOVEC -#include "apr_want.h" - -#if APR_HAVE_UNISTD_H -#include <unistd.h> -#endif -#if APR_HAVE_SYS_SOCKET_H -#include <sys/socket.h> -#endif - -#if !APR_HAS_THREADS -#error The perchild MPM requires APR threads, but they are unavailable. -#endif - -#define CORE_PRIVATE - -#include "ap_config.h" -#include "httpd.h" -#include "http_main.h" -#include "http_log.h" -#include "http_config.h" /* for read_config */ -#include "http_core.h" /* for get_remote_host */ -#include "http_protocol.h" -#include "http_connection.h" -#include "ap_mpm.h" -#include "unixd.h" -#include "mpm_common.h" -#include "ap_listen.h" -#include "mpm_default.h" -#include "mpm.h" -#include "scoreboard.h" -#include "util_filter.h" - -/* ### should be APR-ized */ -#include <poll.h> -#include <grp.h> -#include <pwd.h> -#include <sys/stat.h> -#include <sys/un.h> -#include <setjmp.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; -static int num_daemons=0; -static int curr_child_num=0; -static int workers_may_exit = 0; -static int requests_this_child; -static int num_listenfds = 0; -static apr_socket_t **listenfds; -static jmp_buf jmpbuffer; - -struct child_info_t { - uid_t uid; - gid_t gid; - int sd; -}; - -typedef struct { - const char *sockname; /* The base name for the socket */ - const char *fullsockname; /* socket base name + extension */ - int sd; /* The socket descriptor */ - int sd2; /* The socket descriptor */ -} perchild_server_conf; - -typedef struct child_info_t child_info_t; - -/* Tables used to determine the user and group each child process should - * run as. The hash table is used to correlate a server name with a child - * process. - */ -static child_info_t child_info_table[HARD_SERVER_LIMIT]; -static int thread_socket_table[HARD_THREAD_LIMIT]; - - -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; -int ap_threads_per_child = HARD_THREAD_LIMIT; - -char ap_coredump_dir[MAX_STRING_LEN]; - -module AP_MODULE_DECLARE_DATA mpm_perchild_module; - -static apr_file_t *pipe_of_death_in = NULL; -static apr_file_t *pipe_of_death_out = NULL; -static apr_lock_t *pipe_of_death_mutex; - -/* *Non*-shared http_main globals... */ - -server_rec *ap_server_conf; - -/* one_process --- debugging mode variable; can be set from the command line - * with the -X flag. If set, this gets you the child_main loop running - * in the process which originally started up (no detach, no make_child), - * which is a pretty nice debugging environment. (You'll get a SIGHUP - * early in standalone_main; just continue through. This is the server - * trying to kill off any child processes which it might have lying - * around --- Apache doesn't keep track of their pids, it just sends - * SIGHUP to the process group, ignoring it in the root process. - * Continue through and you'll be fine.). - */ - -static int one_process = 0; - -#ifdef DEBUG_SIGSTOP -int raise_sigstop_flags; -#endif - -static apr_pool_t *pconf; /* Pool for config stuff */ -static apr_pool_t *pchild; /* Pool for httpd child stuff */ -static apr_pool_t *thread_pool_parent; /* Parent of per-thread pools */ -static apr_lock_t *thread_pool_parent_mutex; - -static int child_num; -static unsigned int my_pid; /* Linux getpid() doesn't work except in - main thread. Use this instead */ -/* Keep track of the number of worker threads currently active */ -static int worker_thread_count; -static apr_lock_t *worker_thread_count_mutex; -static int worker_thread_free_ids[HARD_THREAD_LIMIT]; -static apr_threadattr_t *worker_thread_attr; - -/* Keep track of the number of idle worker threads */ -static int idle_thread_count; -static apr_lock_t *idle_thread_count_mutex; - -/* Locks for accept serialization */ -#ifdef NO_SERIALIZED_ACCEPT -#define SAFE_ACCEPT(stmt) APR_SUCCESS -#else -#define SAFE_ACCEPT(stmt) (stmt) -static apr_lock_t *process_accept_mutex; -#endif /* NO_SERIALIZED_ACCEPT */ -static const char *lock_fname; -static apr_lock_t *thread_accept_mutex; - -AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result) -{ - switch(query_code){ - case AP_MPMQ_MAX_DAEMONS: - *result = ap_max_daemons_limit; - return APR_SUCCESS; - case AP_MPMQ_IS_THREADED: - *result = AP_MPMQ_DYNAMIC; - return APR_SUCCESS; - case AP_MPMQ_IS_FORKED: - *result = AP_MPMQ_STATIC; - return APR_SUCCESS; - case AP_MPMQ_HARD_LIMIT_DAEMONS: - *result = HARD_SERVER_LIMIT; - return APR_SUCCESS; - case AP_MPMQ_HARD_LIMIT_THREADS: - *result = HARD_THREAD_LIMIT; - return APR_SUCCESS; - case AP_MPMQ_MAX_THREADS: - *result = max_threads; - return APR_SUCCESS; - } - return APR_ENOTIMPL; -} - -/* a clean exit from a child with proper cleanup */ -static void clean_child_exit(int code) -{ - if (pchild) { - apr_pool_destroy(pchild); - } - exit(code); -} - -/* handle all varieties of core dumping signals */ -static void sig_coredump(int sig) -{ - chdir(ap_coredump_dir); - apr_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; -/* we don't currently track ap_my_generation, but mod_status - * references it so it must be defined */ -ap_generation_t volatile ap_my_generation=0; - -/* - * ap_start_shutdown() and ap_start_restart(), below, are a first stab at - * functions to initiate shutdown or restart without relying on signals. - * Previously this was initiated in sig_term() and restart() signal handlers, - * but we want to be able to start a shutdown/restart from other sources -- - * e.g. on Win32, from the service manager. Now the service manager can - * call ap_start_shutdown() or ap_start_restart() as appropiate. Note that - * these functions can also be called by the child processes, since global - * variables are no longer used to pass on the required action to the parent. - * - * These should only be called from the parent process itself, since the - * parent process will use the shutdown_pending and restart_pending variables - * to determine whether to shutdown or restart. The child process should - * call signal_parent() directly to tell the parent to die -- this will - * cause neither of those variable to be set, which the parent will - * assume means something serious is wrong (which it will be, for the - * child to force an exit) and so do an exit anyway. - */ - -static void ap_start_shutdown(void) -{ - if (shutdown_pending == 1) { - /* Um, is this _probably_ not an error, if the user has - * tried to do a shutdown twice quickly, so we won't - * worry about reporting it. - */ - return; - } - shutdown_pending = 1; -} - -/* do a graceful restart if graceful == 1 */ -static void ap_start_restart(int graceful) -{ - - if (restart_pending == 1) { - /* Probably not an error - don't bother reporting it */ - return; - } - restart_pending = 1; - is_graceful = graceful; - if (is_graceful) { - apr_pool_cleanup_kill(pconf, NULL, ap_cleanup_scoreboard); - } -} - -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) { - apr_signal(SIGSEGV, sig_coredump); -#ifdef SIGBUS - apr_signal(SIGBUS, sig_coredump); -#endif /* SIGBUS */ -#ifdef SIGABORT - apr_signal(SIGABORT, sig_coredump); -#endif /* SIGABORT */ -#ifdef SIGABRT - apr_signal(SIGABRT, sig_coredump); -#endif /* SIGABRT */ -#ifdef SIGILL - apr_signal(SIGILL, sig_coredump); -#endif /* SIGILL */ -#ifdef SIGXCPU - apr_signal(SIGXCPU, SIG_DFL); -#endif /* SIGXCPU */ -#ifdef SIGXFSZ - apr_signal(SIGXFSZ, SIG_DFL); -#endif /* SIGXFSZ */ - } - - apr_signal(SIGTERM, sig_term); -#ifdef SIGHUP - apr_signal(SIGHUP, restart); -#endif /* SIGHUP */ -#ifdef SIGWINCH - apr_signal(SIGWINCH, restart); -#endif /* SIGWINCH */ -#ifdef SIGPIPE - apr_signal(SIGPIPE, SIG_IGN); -#endif /* SIGPIPE */ - -#endif -} - -/***************************************************************** - * Here follows a long bunch of generic server bookkeeping stuff... - */ - -int ap_graceful_stop_signalled(void) -{ - /* XXX - Does this really work? - Manoj */ - return is_graceful; -} - -/***************************************************************** - * Child process main loop. - */ - -static void process_socket(apr_pool_t *p, apr_socket_t *sock, long conn_id) -{ - conn_rec *current_conn; - int csd; - apr_status_t rv; - int thread_num = conn_id % HARD_THREAD_LIMIT; - - if ((rv = apr_os_sock_get(&csd, sock)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, "apr_os_sock_get"); - } - - 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); - apr_socket_close(sock); - return; - } - - if (thread_socket_table[thread_num] < 0) { - ap_sock_disable_nagle(sock); - } - - current_conn = ap_new_connection(p, ap_server_conf, sock, conn_id); - if (current_conn) { - 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) -{ - apr_thread_t *thread; - int rc; - - apr_lock_acquire(worker_thread_count_mutex); - if (worker_thread_count < max_threads - 1) { - if ((rc = apr_thread_create(&thread, worker_thread_attr, worker_thread, - &worker_thread_free_ids[worker_thread_count], pchild))) { - ap_log_error(APLOG_MARK, APLOG_ALERT, rc, ap_server_conf, - "apr_thread_create: unable to create worker thread"); - /* In case system resources are maxxed out, we don't want - Apache running away with the CPU trying to fork over and - over and over again if we exit. */ - sleep(10); - workers_may_exit = 1; - apr_lock_release(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; - } - apr_lock_release(worker_thread_count_mutex); - return 0; - } - apr_lock_release(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) -{ - apr_lock_acquire(pipe_of_death_mutex); - if (!workers_may_exit) { - int ret; - char pipe_read_char; - apr_size_t n = 1; - - ret = apr_recv(listenfds[0], &pipe_read_char, &n); - if (APR_STATUS_IS_EAGAIN(ret)) { - /* It lost the lottery. It must continue to suffer - * through a life of servitude. */ - } - else { - /* It won the lottery (or something else is very - * wrong). Embrace death with open arms. */ - workers_may_exit = 1; - } - } - apr_lock_release(pipe_of_death_mutex); -} - -/* idle_thread_count should be incremented before starting a worker_thread */ - -static void *worker_thread(void *arg) -{ - apr_socket_t *csd = NULL; - apr_pool_t *tpool; /* Pool for this thread */ - apr_pool_t *ptrans; /* Pool for per-transaction stuff */ - apr_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; - apr_pollfd_t *pollset; - int n; - apr_status_t rv; - - apr_lock_acquire(thread_pool_parent_mutex); - apr_pool_create(&tpool, thread_pool_parent); - apr_lock_release(thread_pool_parent_mutex); - apr_pool_create(&ptrans, tpool); - - (void) ap_update_child_status(child_num, thread_num, SERVER_STARTING, - (request_rec *) NULL); - - apr_poll_setup(&pollset, num_listenfds+1, tpool); - for(n=0 ; n <= num_listenfds ; ++n) { - apr_poll_socket_add(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) { - apr_lock_acquire(idle_thread_count_mutex); - if (idle_thread_count < max_spare_threads) { - idle_thread_count++; - apr_lock_release(idle_thread_count_mutex); - } - else { - apr_lock_release(idle_thread_count_mutex); - break; - } - } - else { - thread_just_started = 0; - } - - (void) ap_update_child_status(child_num, thread_num, SERVER_READY, - (request_rec *) NULL); - - apr_lock_acquire(thread_accept_mutex); - if (workers_may_exit) { - apr_lock_release(thread_accept_mutex); - break; - } - if ((rv = SAFE_ACCEPT(apr_lock_acquire(process_accept_mutex))) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "apr_lock_acquire failed. Attempting to shutdown " - "process gracefully."); - workers_may_exit = 1; - } - - while (!workers_may_exit) { - apr_int16_t event; - srv = apr_poll(pollset, &n, -1); - - if (srv != APR_SUCCESS) { - if (APR_STATUS_IS_EINTR(srv)) { - continue; - } - - /* apr_poll() will only return errors in catastrophic - * circumstances. Let's try exiting gracefully, for now. */ - ap_log_error(APLOG_MARK, APLOG_ERR, srv, (const server_rec *) - ap_server_conf, "apr_poll: (listen)"); - workers_may_exit = 1; - } - if (workers_may_exit) break; - - apr_poll_revents_get(&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; - } - - apr_poll_revents_get(&event, listenfds[1], pollset); - if (event & APR_POLLIN || event & APR_POLLOUT) { - /* This request is from another child in our current process. - * We should set a flag here, and then below we will read - * two bytes (the socket number and the NULL byte. - */ - thread_socket_table[thread_num] = -2; - goto got_from_other_child; - } - - 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? */ - apr_poll_revents_get(&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 = apr_accept(&csd, sd, ptrans)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, "apr_accept"); - } - if ((rv = SAFE_ACCEPT(apr_lock_release(process_accept_mutex))) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "apr_lock_release failed. Attempting to shutdown " - "process gracefully."); - workers_may_exit = 1; - } - apr_lock_release(thread_accept_mutex); - apr_lock_acquire(idle_thread_count_mutex); - if (idle_thread_count > min_spare_threads) { - idle_thread_count--; - } - else { - if (!start_thread()) { - idle_thread_count--; - } - } - apr_lock_release(idle_thread_count_mutex); - got_from_other_child: - if (thread_socket_table[thread_num] == -2) { - struct msghdr msg; - struct cmsghdr *cmsg; - char sockname[80]; - struct iovec iov; - int ret, sd, dp; - - iov.iov_base = sockname; - iov.iov_len = 80; - - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - - cmsg = apr_palloc(ptrans, sizeof(*cmsg) + sizeof(sd)); - cmsg->cmsg_len = sizeof(*cmsg) + sizeof(sd); - msg.msg_control = (caddr_t)cmsg; - msg.msg_controllen = cmsg->cmsg_len; - msg.msg_flags = 0; - - ret = recvmsg(child_info_table[child_num].sd, &msg, 0); - - memcpy(&dp, CMSG_DATA(cmsg), sizeof(dp)); - - thread_socket_table[thread_num] = dp; - apr_os_sock_put(&csd, &child_info_table[child_num].sd, ptrans); - } - if (setjmp(jmpbuffer) != 1) { - process_socket(ptrans, csd, conn_id); - } - else { - thread_socket_table[thread_num] = -1; - } - requests_this_child--; - } else { - if ((rv = SAFE_ACCEPT(apr_lock_release(process_accept_mutex))) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf, - "apr_lock_release failed. Attempting to shutdown " - "process gracefully."); - workers_may_exit = 1; - } - apr_lock_release(thread_accept_mutex); - apr_lock_acquire(idle_thread_count_mutex); - idle_thread_count--; - apr_lock_release(idle_thread_count_mutex); - break; - } - apr_pool_clear(ptrans); - } - - apr_lock_acquire(thread_pool_parent_mutex); - ap_update_child_status(child_num, thread_num, SERVER_DEAD, - (request_rec *) NULL); - apr_pool_destroy(tpool); - apr_lock_release(thread_pool_parent_mutex); - apr_lock_acquire(worker_thread_count_mutex); - worker_thread_count--; - worker_thread_free_ids[worker_thread_count] = thread_num; - if (worker_thread_count == 0) { - /* All the threads have exited, now finish the shutdown process - * by signalling the sigwait thread */ - kill(my_pid, SIGTERM); - } - apr_lock_release(worker_thread_count_mutex); - - return NULL; -} - -/* Set group privileges. - * - * Note that we use the username as set in the config files, rather than - * the lookup of to uid --- the same uid may have multiple passwd entries, - * with different sets of groups for each. - */ - -static int set_group_privs(uid_t uid, gid_t gid) -{ - if (!geteuid()) { - const char *name; - - /* Get username if passed as a uid */ - - struct passwd *ent; - - if ((ent = getpwuid(uid)) == NULL) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "getpwuid: couldn't determine user name from uid %u, " - "you probably need to modify the User directive", - (unsigned)uid); - return -1; - } - - name = ent->pw_name; - - /* - * Set the GID before initgroups(), since on some platforms - * setgid() is known to zap the group list. - */ - if (setgid(gid) == -1) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setgid: unable to set group id to Group %u", - (unsigned)gid); - return -1; - } - - /* Reset `groups' attributes. */ - - if (initgroups(name, gid) == -1) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "initgroups: unable to set groups for User %s " - "and Group %u", name, (unsigned)gid); - return -1; - } - } - return 0; -} - - -static int perchild_setup_child(int childnum) -{ - child_info_t *ug = &child_info_table[childnum]; - - if (ug->uid == -1 && ug->gid == -1) { - return unixd_setup_child(); - } - if (set_group_privs(ug->uid, ug->gid)) { - return -1; - } - /* Only try to switch if we're running as root */ - if (!geteuid() && ( -#ifdef _OSD_POSIX - os_init_job_environment(server_conf, unixd_config.user_name, one_process) != 0 || -#endif - setuid(ug->uid) == -1)) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setuid: unable to change to uid: %ld", - (long) ug->uid); - return -1; - } - return 0; -} - -static int check_signal(int signum) -{ - switch (signum) { - case SIGTERM: - case SIGINT: - just_die(signum); - return 1; - } - return 0; -} - -static void child_main(int child_num_arg) -{ - int i; - ap_listen_rec *lr; - apr_status_t rv; - apr_thread_t *thread; - - my_pid = getpid(); - child_num = child_num_arg; - apr_pool_create(&pchild, pconf); - - /*stuff to do before we switch id's, so we have permissions.*/ - - rv = SAFE_ACCEPT(apr_lock_child_init(&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 (perchild_setup_child(child_num)) { - clean_child_exit(APEXIT_CHILDFATAL); - } - - ap_run_child_init(pchild, ap_server_conf); - - /*done with init critical section */ - - apr_setup_signal_thread(); - - requests_this_child = max_requests_per_child; - - /* Set up the pollfd array, num_listenfds + 1 for the pipe and 1 for - * the child socket. - */ - listenfds = apr_pcalloc(pchild, sizeof(*listenfds) * (num_listenfds + 2)); -#if APR_FILES_AS_SOCKETS - apr_socket_from_file(&listenfds[0], pipe_of_death_in); -#endif - - /* The child socket */ - apr_os_sock_put(&listenfds[1], &child_info_table[child_num].sd, pchild); - - num_listenfds++; - for (lr = ap_listeners, i = 2; 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; - } - apr_pool_create(&thread_pool_parent, pchild); - apr_lock_create(&thread_pool_parent_mutex, APR_MUTEX, APR_INTRAPROCESS, - NULL, pchild); - apr_lock_create(&idle_thread_count_mutex, APR_MUTEX, APR_INTRAPROCESS, - NULL, pchild); - apr_lock_create(&worker_thread_count_mutex, APR_MUTEX, APR_INTRAPROCESS, - NULL, pchild); - apr_lock_create(&pipe_of_death_mutex, APR_MUTEX, APR_INTRAPROCESS, - NULL, pchild); - apr_lock_create(&thread_accept_mutex, APR_MUTEX, APR_INTRAPROCESS, - NULL, pchild); - - apr_threadattr_create(&worker_thread_attr, pchild); - apr_threadattr_detach_set(worker_thread_attr, 1); - - /* We are creating worker threads right now */ - for (i=0; i < threads_to_start; i++) { - /* start_thread shouldn't fail here */ - if (!start_thread()) { - break; - } - } - - apr_signal_thread(check_signal); -} - -static int make_child(server_rec *s, int slot) -{ - int pid; - - if (slot + 1 > ap_max_daemons_limit) { - ap_max_daemons_limit = slot + 1; - } - - if (one_process) { - set_signals(); - ap_child_table[slot].pid = getpid(); - ap_child_table[slot].status = SERVER_ALIVE; - child_main(slot); - } - (void) ap_update_child_status(slot, 0, SERVER_STARTING, (request_rec *) NULL); - - if ((pid = fork()) == -1) { - ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, - "fork: Unable to fork new process"); - /* In case system resources are maxxed out, we don't want - Apache running away with the CPU trying to fork over and - over and over again. */ - sleep(10); - - return -1; - } - - if (!pid) { -#ifdef 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 - apr_signal(SIGTERM, just_die); - */ - child_main(slot); - clean_child_exit(0); - } - /* else */ - ap_child_table[slot].pid = pid; - ap_child_table[slot].status = SERVER_ALIVE; - - return 0; -} - -/* start up a bunch of children */ -static int startup_children(int number_to_start) -{ - int i; - - for (i = 0; number_to_start && i < num_daemons; ++i) { - if (ap_child_table[i].pid) { - continue; - } - if (make_child(ap_server_conf, i) < 0) { - break; - } - --number_to_start; - } - return number_to_start; -} - - -/* - * spawn_rate is the number of children that will be spawned on the - * next maintenance cycle if there aren't enough servers. It is - * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by - * without the need to spawn. - */ -static int spawn_rate = 1; -#ifndef MAX_SPAWN_RATE -#define MAX_SPAWN_RATE (32) -#endif -static int hold_off_on_exponential_spawning; - -static void perform_child_maintenance(void) -{ - int i; - int free_length; - int free_slots[MAX_SPAWN_RATE]; - int last_non_dead = -1; - - /* initialize the free_list */ - free_length = 0; - - for (i = 0; i < num_daemons; ++i) { - if (ap_child_table[i].pid == 0) { - if (free_length < spawn_rate) { - free_slots[free_length] = i; - ++free_length; - } - } - else { - last_non_dead = i; - } - - if (i >= ap_max_daemons_limit && free_length >= spawn_rate) { - break; - } - } - ap_max_daemons_limit = last_non_dead + 1; - - if (free_length > 0) { - for (i = 0; i < free_length; ++i) { - make_child(ap_server_conf, free_slots[i]); - } - /* the next time around we want to spawn twice as many if this - * wasn't good enough, but not if we've just done a graceful - */ - if (hold_off_on_exponential_spawning) { - --hold_off_on_exponential_spawning; - } - else if (spawn_rate < MAX_SPAWN_RATE) { - spawn_rate *= 2; - } - } - else { - spawn_rate = 1; - } -} - -static void server_main_loop(int remaining_children_to_start) -{ - int child_slot; - apr_wait_t status; - apr_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) { - child_slot = i; - break; - } - } - if (child_slot >= 0) { - ap_child_table[child_slot].pid = 0; - ap_update_child_status(child_slot, i, SERVER_DEAD, (request_rec *) NULL); - - - if (remaining_children_to_start - && child_slot < num_daemons) { - /* we're still doing a 1-for-1 replacement of dead - * children with new children - */ - make_child(ap_server_conf, child_slot); - --remaining_children_to_start; - } -#if APR_HAS_OTHER_CHILD - } - else if (apr_proc_other_child_read(&pid, status) == 0) { - /* handled */ -#endif - } - else if (is_graceful) { - /* Great, we've probably just lost a slot in the - * child table. Somehow we don't know about this - * child. - */ - ap_log_error(APLOG_MARK, APLOG_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(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s) -{ - int remaining_children_to_start; - int i; - apr_status_t rv; - apr_size_t one = 1; - - pconf = _pconf; - ap_server_conf = s; - if ((rv = apr_file_pipe_create(&pipe_of_death_in, &pipe_of_death_out, pconf)) - != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, - (const server_rec*) ap_server_conf, - "apr_file_pipe_create (pipe_of_death)"); - exit(1); - } - if ((rv = apr_file_pipe_timeout_set(pipe_of_death_in, 0)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, - (const server_rec*) ap_server_conf, - "apr_file_pipe_timeout_set (pipe_of_death)"); - exit(1); - } - 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 = apr_psprintf(_pconf, "%s.%u", - ap_server_root_relative(_pconf, lock_fname), - my_pid); - rv = SAFE_ACCEPT(apr_lock_create(&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) { - ap_create_scoreboard(pconf, SB_SHARED); - } - /* Initialize the child table */ - if (!is_graceful) { - for (i = 0; i < HARD_SERVER_LIMIT; i++) { - ap_child_table[i].pid = 0; - } - } - - 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 */ - apr_signal(SIGHUP, SIG_IGN); - - if (one_process) { - /* not worth thinking about */ - return 1; - } - - if (is_graceful) { - char char_of_death = '!'; - - ap_log_error(APLOG_MARK, APLOG_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].pid) { - ap_child_table[i].status = SERVER_DYING; - } - } - /* give the children the signal to die */ - for (i = 0; i < num_daemons;) { - if ((rv = apr_file_write(pipe_of_death_out, &char_of_death, &one)) != APR_SUCCESS) { - if (APR_STATUS_IS_EINTR(rv)) continue; - ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, - "write pipe_of_death"); - } - i++; - } - } - else { - /* Kill 'em all. Since the child acts the same on the parents SIGTERM - * and a SIGHUP, we may as well use the same signal, because some user - * pthreads are stealing signals from us left and right. - */ - if (unixd_killpg(getpgrp(), SIGTERM) < 0) { - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, - "killpg SIGTERM"); - } - ap_reclaim_child_processes(1); /* Start with SIGTERM */ - ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, - ap_server_conf, "SIGHUP received. Attempting to restart"); - } - return 0; -} - -static void perchild_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp) -{ - static int restart_num = 0; - int no_detach = 0; - int i; - - one_process = !!ap_exists_config_define("ONE_PROCESS"); - no_detach = !!ap_exists_config_define("NO_DETACH"); - - /* sigh, want this only the second time around */ - if (restart_num++ == 1) { - is_graceful = 0; - - if (!one_process && !no_detach) { - apr_proc_detach(); - } - - my_pid = getpid(); - } - - unixd_pre_config(ptemp); - ap_listen_pre_config(); - num_daemons = DEFAULT_NUM_DAEMON; - threads_to_start = DEFAULT_START_THREAD; - min_spare_threads = DEFAULT_MIN_SPARE_THREAD; - max_spare_threads = DEFAULT_MAX_SPARE_THREAD; - max_threads = 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; - curr_child_num = 0; - - apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir)); - - for (i = 0; i < HARD_SERVER_LIMIT; i++) { - child_info_table[i].uid = -1; - child_info_table[i].gid = -1; - child_info_table[i].sd = -1; - } - for (i = 0; i < HARD_THREAD_LIMIT; i++) { - thread_socket_table[i] = -1; - } -} - -static int pass_request(request_rec *r) -{ - apr_socket_t *thesock = r->connection->client_socket; - struct msghdr msg; - struct cmsghdr *cmsg; - int sfd; - struct iovec iov; - apr_bucket_brigade *bb = apr_brigade_create(r->pool); - perchild_server_conf *sconf = (perchild_server_conf *) - ap_get_module_config(r->server->module_config, - &mpm_perchild_module); - char *foo; - apr_size_t len; - apr_size_t readbytes = 0; - - apr_pool_userdata_get((void **)&foo, "PERCHILD_BUFFER", r->connection->pool); - len = strlen(foo); - - apr_pool_userdata_set(NULL, "PERCHILD_BUFFER", apr_pool_cleanup_null, - r->connection->pool); - - apr_os_sock_get(&sfd, thesock); - - iov.iov_base = NULL; - iov.iov_len = 0; - - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - - cmsg = apr_palloc(r->pool, sizeof(*cmsg) + sizeof(sfd)); - cmsg->cmsg_len = sizeof(*cmsg) + sizeof(int); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - - memcpy(CMSG_DATA(cmsg), &sfd, sizeof(sfd)); - - msg.msg_control = (caddr_t)cmsg; - msg.msg_controllen = cmsg->cmsg_len; - msg.msg_flags=0; - - if (sendmsg(sconf->sd2, &msg, 0) == -1) { - apr_pool_destroy(r->pool); - return -1; - } - - write(sconf->sd2, foo, len); - - while (ap_get_brigade(r->input_filters, bb, AP_MODE_NONBLOCKING, &readbytes) == APR_SUCCESS) { - apr_bucket *e; - APR_BRIGADE_FOREACH(e, bb) { - const char *str; - - apr_bucket_read(e, &str, &len, APR_NONBLOCK_READ); - write(sconf->sd2, str, len); - } - } - - apr_pool_destroy(r->pool); - return 1; -} - -static char *make_perchild_socket(const char *fullsockname, int sd[2]) -{ - socketpair(PF_UNIX, SOCK_STREAM, 0, sd); - return NULL; -} - - -static void perchild_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s) -{ - int i; - server_rec *sr; - perchild_server_conf *sconf; - int def_sd[2]; - - def_sd[0] = -1; - def_sd[1] = -1; - - for (sr = s; sr; sr = sr->next) { - sconf = (perchild_server_conf *)ap_get_module_config(sr->module_config, - &mpm_perchild_module); - - if (sconf->sd == -1) { - sconf->fullsockname = apr_pstrcat(sr->process->pool, - sconf->sockname, ".DEFAULT", NULL); - if (def_sd[0] == -1) { - if (!make_perchild_socket(sconf->fullsockname, def_sd)) { - /* log error */ - } - } - sconf->sd = def_sd[0]; - sconf->sd2 = def_sd[1]; - } - } - - for (i = 0; i < num_daemons; i++) { - if (child_info_table[i].uid == -1) { - child_info_table[i].sd = def_sd[0]; - } - } -} - -static int perchild_post_read(request_rec *r) -{ - ap_filter_t *f = r->connection->input_filters; - int thread_num = r->connection->id % HARD_THREAD_LIMIT; - perchild_server_conf *sconf = (perchild_server_conf *) - ap_get_module_config(r->server->module_config, - &mpm_perchild_module); - - while (f) { - if (!strcmp("PERCHILD_BUFFER", f->frec->name)) { - ap_remove_output_filter(f); - break; - } - f = f->next; - } - - if (thread_socket_table[thread_num] != -1) { - apr_socket_t *csd = NULL; - - apr_os_sock_put(&csd, &thread_socket_table[thread_num], - r->connection->pool); - ap_sock_disable_nagle(csd); - r->connection->client_socket = csd; - return OK; - } - else { - if (sconf->sd != child_info_table[child_num].sd) { - if (pass_request(r) == -1) { - ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, - ap_server_conf, "Could not pass request to proper " - "child, request will not be honored."); - } - longjmp(jmpbuffer, 1); - } - return OK; - } - return OK; -} - -static apr_status_t perchild_buffer(ap_filter_t *f, apr_bucket_brigade *b, ap_input_mode_t mode, apr_size_t *readbytes) -{ - apr_bucket *e; - apr_status_t rv; - char *buffer = NULL; - const char *str; - apr_size_t len; - - if ((rv = ap_get_brigade(f->next, b, mode, readbytes)) != APR_SUCCESS) { - return rv; - } - - apr_pool_userdata_get((void **)&buffer, "PERCHILD_BUFFER", f->c->pool); - - APR_BRIGADE_FOREACH(e, b) { - if (e->length != 0) { - apr_bucket_read(e, &str, &len, APR_NONBLOCK_READ); - - if (buffer == NULL) { - buffer = apr_pstrndup(f->c->pool, str, len); - } - else { - buffer = apr_pstrcat(f->c->pool, buffer, - apr_pstrndup(f->c->pool, str, len), NULL); - } - } - } - apr_pool_userdata_set(buffer, "PERCHILD_BUFFER", apr_pool_cleanup_null, f->c->pool); - - return APR_SUCCESS; -} - -static int perchild_pre_connection(conn_rec *c) -{ - ap_add_input_filter("PERCHILD_BUFFER", NULL, NULL, c); - return OK; -} - -static void perchild_hooks(apr_pool_t *p) -{ - one_process = 0; - - ap_hook_pre_config(perchild_pre_config, NULL, NULL, APR_HOOK_MIDDLE); - ap_hook_post_config(perchild_post_config, NULL, NULL, APR_HOOK_MIDDLE); - ap_hook_pre_connection(perchild_pre_connection,NULL,NULL, APR_HOOK_MIDDLE); - - /* This must be run absolutely first. If this request isn't for this - * server then we need to forward it to the proper child. No sense - * tying up this server running more post_read request hooks if it is - * just going to be forwarded along. - */ - ap_hook_post_read_request(perchild_post_read, NULL, NULL, APR_HOOK_REALLY_FIRST); - ap_register_input_filter("PERCHILD_BUFFER", perchild_buffer, AP_FTYPE_CONTENT); -} - -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_coredumpdir (cmd_parms *cmd, void *dummy, - const char *arg) -{ - apr_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 ((apr_stat(&finfo, fname, APR_FINFO_TYPE, cmd->pool) != APR_SUCCESS) - || (finfo.filetype != APR_DIR)) { - return apr_pstrcat(cmd->pool, "CoreDumpDirectory ", fname, - " does not exist or is not a directory", NULL); - } - apr_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir)); - return NULL; -} - -static const char *set_child_per_uid(cmd_parms *cmd, void *dummy, const char *u, - const char *g, const char *num) -{ - int i; - int max_this_time = atoi(num) + curr_child_num; - for (i = curr_child_num; i < max_this_time; i++, curr_child_num++); { - child_info_t *ug = &child_info_table[i - 1]; - - if (i > num_daemons) { - return "Trying to use more child ID's than NumServers. Increase " - "NumServers in your config file."; - } - - ug->uid = atoi(u); - ug->gid = atoi(g); - } - return NULL; -} - -static const char *assign_childuid(cmd_parms *cmd, void *dummy, const char *uid, - const char *gid) -{ - int i; - int u = atoi(uid); - int g = atoi(gid); - const char *errstr; - int socks[2]; - perchild_server_conf *sconf = (perchild_server_conf *) - ap_get_module_config(cmd->server->module_config, - &mpm_perchild_module); - - sconf->fullsockname = apr_pstrcat(cmd->pool, sconf->sockname, ".", uid, ":", gid, NULL); - - if ((errstr = make_perchild_socket(sconf->fullsockname, socks))) { - return errstr; - } - - sconf->sd = socks[0]; - sconf->sd2 = socks[1]; - - for (i = 0; i < num_daemons; i++) { - if (u == child_info_table[i].uid && g == child_info_table[i].gid) { - child_info_table[i].sd = sconf->sd; - } - } - - return NULL; -} - - -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_TAKE1("CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, - "The location of the directory Apache changes to before dumping core"), -AP_INIT_TAKE3("ChildperUserID", set_child_per_uid, NULL, RSRC_CONF, - "Specify a User and Group for a specific child process."), -AP_INIT_TAKE2("AssignUserID", assign_childuid, NULL, RSRC_CONF, - "Tie a virtual host to a specific child process."), -{ NULL } -}; - -static void *perchild_create_config(apr_pool_t *p, server_rec *s) -{ - perchild_server_conf *c = - (perchild_server_conf *) apr_pcalloc(p, sizeof(perchild_server_conf)); - - c->sd = -1; - return c; -} - -module AP_MODULE_DECLARE_DATA 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 */ - perchild_create_config, /* create per-server config structure */ - NULL, /* merge per-server config structures */ - perchild_cmds, /* command apr_table_t */ - perchild_hooks /* register_hooks */ -}; - |