Mercurial > hg > nginx
view docs/xslt/changes.xslt @ 8018:5119c8150478
Fixed runtime handling of systems without EPOLLRDHUP support.
In 7583:efd71d49bde0 (nginx 1.17.5) along with introduction of the
ioctl(FIONREAD) support proper handling of systems without EPOLLRDHUP
support in the kernel (but with EPOLLRDHUP in headers) was broken.
Before the change, rev->available was never set to 0 unless
ngx_use_epoll_rdhup was also set (that is, runtime test for EPOLLRDHUP
introduced in 6536:f7849bfb6d21 succeeded). After the change,
rev->available might reach 0 on systems without runtime EPOLLRDHUP
support, stopping further reading in ngx_readv_chain() and ngx_unix_recv().
And, if EOF happened to be already reported along with the last event,
it is not reported again by epoll_wait(), leading to connection hangs
and timeouts on such systems.
This affects Linux kernels before 2.6.17 if nginx was compiled
with newer headers, and, more importantly, emulation layers, such as
DigitalOcean's App Platform's / gVisor's epoll emulation layer.
Fix is to explicitly check ngx_use_epoll_rdhup before the corresponding
rev->pending_eof tests in ngx_readv_chain() and ngx_unix_recv().
author | Marcus Ball <marcus.ball@live.com> |
---|---|
date | Mon, 30 May 2022 02:38:07 +0300 |
parents | b7e02f47a339 |
children | de20142f5046 |
line wrap: on
line source
<?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:output method="text"/> <xsl:param select="'en'" name="lang"/> <xsl:param select="'../xml/change_log_conf.xml'" name="configuration"/> <xsl:variable select="document($configuration)/configuration" name="conf"/> <xsl:variable select="$conf/start" name="start"/> <xsl:variable select="$conf/indent" name="indent"/> <xsl:variable select="$conf/length" name="max"/> <xsl:variable name="br"><br></xsl:variable> <xsl:template match="/"> <xsl:apply-templates select="change_log"/> </xsl:template> <xsl:template match="change_log"> <xsl:apply-templates select="changes"/> </xsl:template> <xsl:template match="changes"> <xsl:text> </xsl:text> <xsl:value-of select="substring(concat($conf/changes[@lang=$lang]/title, //change_log/@title, ' ', @ver, ' '), 1, $conf/changes[@lang=$lang]/length)"/> <xsl:if test="$lang='ru'"> <xsl:value-of select="substring(@date, 9, 2)"/> <xsl:text>.</xsl:text> <xsl:value-of select="substring(@date, 6, 2)"/> <xsl:text>.</xsl:text> <xsl:value-of select="substring(@date, 1, 4)"/> </xsl:if> <xsl:if test="$lang='en'"> <xsl:value-of select="substring(@date, 9, 2)"/> <xsl:value-of select="$conf/changes[@lang=$lang]/month[number(substring(current()/@date, 6, 2))]"/> <xsl:value-of select="substring(@date, 1, 4)"/> </xsl:if> <xsl:text> </xsl:text> <xsl:apply-templates select="change"/> <xsl:text> </xsl:text> </xsl:template> <xsl:template match="change"> <xsl:variable select="$conf/changes[@lang=$lang]/*[local-name(.)=current()/@type]" name="prefix"/> <xsl:variable name="postfix"> <xsl:if test="$prefix"> <xsl:text>: </xsl:text> </xsl:if> </xsl:variable> <xsl:apply-templates select="para[@lang=$lang]"><xsl:with-param select="concat($start, $prefix, $postfix)" name="prefix"/></xsl:apply-templates> </xsl:template> <xsl:template name="para" match="para"><xsl:param name="prefix"/> <xsl:variable name="text"> <xsl:apply-templates/> </xsl:variable> <xsl:text> </xsl:text> <xsl:call-template name="wrap"><xsl:with-param select="normalize-space($text)" name="text"/><xsl:with-param name="prefix"> <xsl:choose><xsl:when test="position() = 1"> <xsl:value-of select="$prefix"/> </xsl:when><xsl:otherwise> <xsl:value-of select="$indent"/> </xsl:otherwise></xsl:choose> </xsl:with-param></xsl:call-template></xsl:template> <xsl:template name="wrap"><xsl:param name="text"/><xsl:param name="prefix"/> <xsl:if test="$text"> <xsl:variable name="offset"> <xsl:choose> <xsl:when test="starts-with($text, concat($br, ' '))"> <xsl:value-of select="string-length($br) + 2"/> </xsl:when> <xsl:when test="starts-with($text, $br)"> <xsl:value-of select="string-length($br) + 1"/> </xsl:when> <xsl:otherwise> 1 </xsl:otherwise> </xsl:choose> </xsl:variable> <xsl:variable name="length"> <xsl:call-template name="length"><xsl:with-param select="substring($text, $offset)" name="text"/><xsl:with-param select="string-length($prefix)" name="prefix"/><xsl:with-param select="$max" name="length"/></xsl:call-template></xsl:variable> <xsl:value-of select="$prefix"/> <xsl:value-of select="normalize-space(translate(substring($text, $offset, $length), ' ', ' '))"/> <xsl:text> </xsl:text> <xsl:call-template name="wrap"><xsl:with-param select="substring($text, $length + $offset)" name="text"/><xsl:with-param select="$indent" name="prefix"/></xsl:call-template></xsl:if> </xsl:template> <xsl:template name="length"><xsl:param name="text"/><xsl:param name="prefix"/><xsl:param name="length"/> <xsl:variable select="substring-before(substring($text, 1, $length - $prefix + string-length($br)), $br)" name="break"/> <xsl:choose> <xsl:when test="$break"> <xsl:value-of select="string-length($break)"/> </xsl:when> <xsl:when test="$length = 0"> <xsl:value-of select="$max - $prefix"/> </xsl:when> <xsl:when test="string-length($text) + $prefix <= $length"> <xsl:value-of select="$length - $prefix"/> </xsl:when> <xsl:when test="substring($text, $length - $prefix + 1, 1) = ' '"> <xsl:value-of select="$length - $prefix + 1"/> </xsl:when> <xsl:otherwise> <xsl:call-template name="length"><xsl:with-param select="$text" name="text"/><xsl:with-param select="$prefix" name="prefix"/><xsl:with-param select="$length - 1" name="length"/></xsl:call-template></xsl:otherwise> </xsl:choose> </xsl:template> <xsl:template match="at">@</xsl:template> <xsl:template match="br"> <xsl:value-of select="$br"/> </xsl:template> <xsl:template match="nobr"> <xsl:value-of select="translate(., ' ', ' ')"/> </xsl:template> </xsl:stylesheet>