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.\"     Title: blk_rq_err_bytes
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: Block Devices
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "BLK_RQ_ERR_BYTES" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "Block Devices"
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.SH "NAME"
blk_rq_err_bytes \- determine number of bytes till the next failure boundary
.SH "SYNOPSIS"
.HP \w'unsigned\ int\ blk_rq_err_bytes('u
.BI "unsigned int blk_rq_err_bytes(const\ struct\ request\ *\ " "rq" ");"
.SH "ARGUMENTS"
.PP
\fIconst struct request * rq\fR
.RS 4
request to examine
.RE
.SH "DESCRIPTION"
.PP
A request could be merge of IOs which require different failure handling\&. This function determines the number of bytes which can be failed from the beginning of the request without crossing into area which need to be retried further\&.
.SH "RETURN"
.PP
The number of bytes to fail\&.
.SH "CONTEXT"
.PP
queue_lock must be held\&.
.SH "COPYRIGHT"
.br