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view src/os/unix/ngx_posix_config.h @ 8751:555533169506

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HTTP/2: fixed "task already active" with sendfile in threads. With sendfile in threads, "task already active" alerts might appear in logs if a write event happens on the main HTTP/2 connection, triggering a sendfile in threads while another thread operation is already running. Observed with "aio threads; aio_write on; sendfile on;" and with thread event handlers modified to post a write event to the main HTTP/2 connection (though can happen without any modifications). Similarly, sendfile() with AIO preloading on FreeBSD can trigger duplicate aio operation, resulting in "second aio post" alerts. This is, however, harder to reproduce, especially on modern FreeBSD systems, since sendfile() usually does not return EBUSY. Fix is to avoid starting a sendfile operation if other thread operation is active by checking r->aio in the thread handler (and, similarly, in aio preload handler). The added check also makes duplicate calls protection redundant, so it is removed.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 25 Nov 2021 22:02:05 +0300
parents fc0d06224eda
children
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_POSIX_CONFIG_H_INCLUDED_
#define _NGX_POSIX_CONFIG_H_INCLUDED_


#if (NGX_HPUX)
#define _XOPEN_SOURCE
#define _XOPEN_SOURCE_EXTENDED  1
#define _HPUX_ALT_XOPEN_SOCKET_API
#endif


#if (NGX_TRU64)
#define _REENTRANT
#endif


#if (NGX_GNU_HURD)
#ifndef _GNU_SOURCE
#define _GNU_SOURCE             /* accept4() */
#endif
#define _FILE_OFFSET_BITS       64
#endif


#ifdef __CYGWIN__
#define timezonevar             /* timezone is variable */
#define NGX_BROKEN_SCM_RIGHTS   1
#endif


#include <sys/types.h>
#include <sys/time.h>
#if (NGX_HAVE_UNISTD_H)
#include <unistd.h>
#endif
#if (NGX_HAVE_INTTYPES_H)
#include <inttypes.h>
#endif
#include <stdarg.h>
#include <stddef.h>             /* offsetof() */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <pwd.h>
#include <grp.h>
#include <dirent.h>
#include <glob.h>
#include <time.h>
#if (NGX_HAVE_SYS_PARAM_H)
#include <sys/param.h>          /* statfs() */
#endif
#if (NGX_HAVE_SYS_MOUNT_H)
#include <sys/mount.h>          /* statfs() */
#endif
#if (NGX_HAVE_SYS_STATVFS_H)
#include <sys/statvfs.h>        /* statvfs() */
#endif

#if (NGX_HAVE_SYS_FILIO_H)
#include <sys/filio.h>          /* FIONBIO */
#endif
#include <sys/ioctl.h>          /* FIONBIO */

#include <sys/uio.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sched.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>        /* TCP_NODELAY */
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/un.h>

#if (NGX_HAVE_LIMITS_H)
#include <limits.h>             /* IOV_MAX */
#endif

#ifdef __CYGWIN__
#include <malloc.h>             /* memalign() */
#endif

#if (NGX_HAVE_CRYPT_H)
#include <crypt.h>
#endif


#ifndef IOV_MAX
#define IOV_MAX   16
#endif


#include <ngx_auto_config.h>


#if (NGX_HAVE_DLOPEN)
#include <dlfcn.h>
#endif


#if (NGX_HAVE_POSIX_SEM)
#include <semaphore.h>
#endif


#if (NGX_HAVE_POLL)
#include <poll.h>
#endif


#if (NGX_HAVE_KQUEUE)
#include <sys/event.h>
#endif


#if (NGX_HAVE_DEVPOLL) && !(NGX_TEST_BUILD_DEVPOLL)
#include <sys/ioctl.h>
#include <sys/devpoll.h>
#endif


#if (NGX_HAVE_FILE_AIO)
#include <aio.h>
typedef struct aiocb  ngx_aiocb_t;
#endif


#define NGX_LISTEN_BACKLOG  511

#define ngx_debug_init()


extern char **environ;


#endif /* _NGX_POSIX_CONFIG_H_INCLUDED_ */