| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2002 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.h" |
| #include "apr_strings.h" |
| #include "apr_lock.h" |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_log.h" |
| #include "http_main.h" |
| #include "mpm.h" |
| #include "pod.h" |
| #include "mpm_common.h" |
| #include "ap_mpm.h" |
| #include "ap_listen.h" |
| #include "mpm_default.h" |
| |
| AP_DECLARE(apr_status_t) ap_mpm_pod_open(apr_pool_t *p, ap_pod_t **pod) |
| { |
| apr_status_t rv; |
| |
| *pod = apr_palloc(p, sizeof(**pod)); |
| rv = apr_file_pipe_create(&((*pod)->pod_in), &((*pod)->pod_out), p); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| /* |
| apr_file_pipe_timeout_set((*pod)->pod_in, 0); |
| */ |
| (*pod)->p = p; |
| |
| apr_sockaddr_info_get(&(*pod)->sa, ap_listeners->bind_addr->hostname, |
| APR_UNSPEC, ap_listeners->bind_addr->port, 0, p); |
| |
| return APR_SUCCESS; |
| } |
| |
| AP_DECLARE(int) ap_mpm_pod_check(ap_pod_t *pod) |
| { |
| char c; |
| apr_size_t len = 1; |
| apr_status_t rv; |
| |
| rv = apr_file_read(pod->pod_in, &c, &len); |
| |
| if ((rv == APR_SUCCESS) && (len ==1)) { |
| if (c == RESTART_CHAR) { |
| return AP_RESTART; |
| } |
| if (c == GRACEFUL_CHAR) { |
| return AP_GRACEFUL; |
| } |
| } |
| else if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| return AP_NORESTART; |
| } |
| |
| AP_DECLARE(apr_status_t) ap_mpm_pod_close(ap_pod_t *pod) |
| { |
| apr_status_t rv; |
| |
| rv = apr_file_close(pod->pod_out); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_file_close(pod->pod_in); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| return rv; |
| } |
| |
| static apr_status_t pod_signal_internal(ap_pod_t *pod, int graceful) |
| { |
| apr_status_t rv; |
| char char_of_death = graceful ? GRACEFUL_CHAR : RESTART_CHAR; |
| apr_size_t one = 1; |
| |
| do { |
| rv = apr_file_write(pod->pod_out, &char_of_death, &one); |
| } while (APR_STATUS_IS_EINTR(rv)); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, |
| "write pipe_of_death"); |
| } |
| return rv; |
| } |
| |
| /* This function connects to the server, then immediately closes the connection. |
| * This permits the MPM to skip the poll when there is only one listening |
| * socket, because it provides a alternate way to unblock an accept() when |
| * the pod is used. |
| */ |
| |
| static apr_status_t dummy_connection(ap_pod_t *pod) |
| { |
| apr_status_t rv; |
| apr_socket_t *sock; |
| apr_pool_t *p; |
| |
| /* create a temporary pool for the socket. pconf stays around too long */ |
| rv = apr_pool_create(&p, pod->p); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_socket_create(&sock, pod->sa->family, SOCK_STREAM, p); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, |
| "get socket to connect to listener"); |
| return rv; |
| } |
| /* on some platforms (e.g., FreeBSD), the kernel won't accept many |
| * queued connections before it starts blocking local connects... |
| * we need to keep from blocking too long and instead return an error, |
| * because the MPM won't want to hold up a graceful restart for a |
| * long time |
| */ |
| rv = apr_setsocketopt(sock, APR_SO_TIMEOUT, 3 * APR_USEC_PER_SEC); |
| if (rv != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf, |
| "set timeout on socket to connect to listener"); |
| apr_socket_close(sock); |
| return rv; |
| } |
| |
| rv = apr_connect(sock, pod->sa); |
| if (rv != APR_SUCCESS) { |
| int log_level = APLOG_WARNING; |
| |
| if (APR_STATUS_IS_TIMEUP(rv)) { |
| /* probably some server processes bailed out already and there |
| * is nobody around to call accept and clear out the kernel |
| * connection queue; usually this is not worth logging |
| */ |
| log_level = APLOG_DEBUG; |
| } |
| |
| ap_log_error(APLOG_MARK, log_level, rv, ap_server_conf, |
| "connect to listener"); |
| } |
| |
| apr_socket_close(sock); |
| apr_pool_destroy(p); |
| |
| return rv; |
| } |
| |
| AP_DECLARE(apr_status_t) ap_mpm_pod_signal(ap_pod_t *pod, int graceful) |
| { |
| apr_status_t rv; |
| |
| rv = pod_signal_internal(pod, graceful); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| return dummy_connection(pod); |
| } |
| |
| AP_DECLARE(void) ap_mpm_pod_killpg(ap_pod_t *pod, int num, int graceful) |
| { |
| int i; |
| apr_status_t rv = APR_SUCCESS; |
| |
| for (i = 0; i < num && rv == APR_SUCCESS; i++) { |
| rv = pod_signal_internal(pod, graceful); |
| } |
| if (rv == APR_SUCCESS) { |
| for (i = 0; i < num && rv == APR_SUCCESS; i++) { |
| rv = dummy_connection(pod); |
| } |
| } |
| } |
| |