1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>submit_bio</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="blkdev.html" title="Chapter&#160;14.&#160;Block Devices"><link rel="prev" href="API-generic-make-request.html" title="generic_make_request"><link rel="next" href="API-blk-rq-check-limits.html" title="blk_rq_check_limits"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">submit_bio</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-generic-make-request.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;14.&#160;Block Devices</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-blk-rq-check-limits.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-submit-bio"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>submit_bio &#8212; 
2     submit a bio to the block device layer for I/O
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">submit_bio </b>(</code></td><td>int <var class="pdparam">rw</var>, </td></tr><tr><td>&#160;</td><td>struct bio * <var class="pdparam">bio</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127933276"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>rw</code></em></span></dt><dd><p>
4     whether to <code class="constant">READ</code> or <code class="constant">WRITE</code>, or maybe to <code class="constant">READA</code> (read ahead)
5    </p></dd><dt><span class="term"><em class="parameter"><code>bio</code></em></span></dt><dd><p>
6     The <span class="structname">struct bio</span> which describes the I/O
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127936780"></a><h2>Description</h2><p>
8   <code class="function">submit_bio</code> is very similar in purpose to <code class="function">generic_make_request</code>, and
9   uses that function to do most of the work. Both are fairly rough
10   interfaces; <em class="parameter"><code>bio</code></em> must be presetup and ready for I/O.
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