Mercurial > hg > nginx
view src/os/unix/ngx_errno.h @ 6422:768e287a6f36
Fixed sendfile in threads (or with aio preload) and subrequests.
If sendfile in threads is used, it is possible that multiple
subrequests will trigger multiple ngx_linux_sendfile_thread() calls,
as operations are only serialized in output chain based on r->aio,
that is, on subrequest level.
This resulted in "task #N already active" alerts, in particular, when
running proxy_store.t with "aio threads; sendfile on;".
Fix is to tolerate duplicate calls, with an additional safety check
that the file is the same as previously used.
The same problem also affects "aio on; sendfile on;" on FreeBSD
(previously known as "aio sendfile;"), where aio->preload_handler()
could be called multiple times due to similar reasons, resulting in
"second aio post" alerts. Fix is the same as well.
It is also believed that similar problems can arise if a filter
calls the next body filter multiple times for some reason. These are
mostly theoretical though.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 03 Mar 2016 21:14:12 +0300 |
parents | 3c5ddf0575d8 |
children | a5897d360977 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_ERRNO_H_INCLUDED_ #define _NGX_ERRNO_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> typedef int ngx_err_t; #define NGX_EPERM EPERM #define NGX_ENOENT ENOENT #define NGX_ENOPATH ENOENT #define NGX_ESRCH ESRCH #define NGX_EINTR EINTR #define NGX_ECHILD ECHILD #define NGX_ENOMEM ENOMEM #define NGX_EACCES EACCES #define NGX_EBUSY EBUSY #define NGX_EEXIST EEXIST #define NGX_EXDEV EXDEV #define NGX_ENOTDIR ENOTDIR #define NGX_EISDIR EISDIR #define NGX_EINVAL EINVAL #define NGX_ENFILE ENFILE #define NGX_EMFILE EMFILE #define NGX_ENOSPC ENOSPC #define NGX_EPIPE EPIPE #define NGX_EINPROGRESS EINPROGRESS #define NGX_ENOPROTOOPT ENOPROTOOPT #define NGX_EOPNOTSUPP EOPNOTSUPP #define NGX_EADDRINUSE EADDRINUSE #define NGX_ECONNABORTED ECONNABORTED #define NGX_ECONNRESET ECONNRESET #define NGX_ENOTCONN ENOTCONN #define NGX_ETIMEDOUT ETIMEDOUT #define NGX_ECONNREFUSED ECONNREFUSED #define NGX_ENAMETOOLONG ENAMETOOLONG #define NGX_ENETDOWN ENETDOWN #define NGX_ENETUNREACH ENETUNREACH #define NGX_EHOSTDOWN EHOSTDOWN #define NGX_EHOSTUNREACH EHOSTUNREACH #define NGX_ENOSYS ENOSYS #define NGX_ECANCELED ECANCELED #define NGX_EILSEQ EILSEQ #define NGX_ENOMOREFILES 0 #define NGX_ELOOP ELOOP #define NGX_EBADF EBADF #if (NGX_HAVE_OPENAT) #define NGX_EMLINK EMLINK #endif #if (__hpux__) #define NGX_EAGAIN EWOULDBLOCK #else #define NGX_EAGAIN EAGAIN #endif #define ngx_errno errno #define ngx_socket_errno errno #define ngx_set_errno(err) errno = err #define ngx_set_socket_errno(err) errno = err u_char *ngx_strerror(ngx_err_t err, u_char *errstr, size_t size); ngx_int_t ngx_strerror_init(void); #endif /* _NGX_ERRNO_H_INCLUDED_ */