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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>probe::ioblock.end</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="SystemTap Tapset Reference Manual"><link rel="up" href="iosched.stp.html" title="Chapter 9. IO Scheduler and block IO Tapset"><link rel="prev" href="iosched.stp.html" title="Chapter 9. IO Scheduler and block IO Tapset"><link rel="next" href="API-ioblock-request.html" title="probe::ioblock.request"></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>probe::ioblock.end</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="iosched.stp.html">Prev</a> </td><th width="60%" align="center">Chapter 9. IO Scheduler and block IO Tapset</th><td width="20%" align="right"> <a accesskey="n" href="API-ioblock-request.html">Next</a></td></tr></table><hr></div><div class="refentry" title="probe::ioblock.end"><a name="API-ioblock-end"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>probe::ioblock.end —
Fires whenever a block I/O transfer is complete.
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="synopsis">ioblock.end </pre></div><div class="refsect1" title="Values"><a name="idp6761360"></a><h2>Values</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>flags</code></em></span></dt><dd><p>
see below
BIO_UPTODATE 0 ok after I/O completion
BIO_RW_BLOCK 1 RW_AHEAD set, and read/write would block
BIO_EOF 2 out-out-bounds error
BIO_SEG_VALID 3 nr_hw_seg valid
BIO_CLONED 4 doesn't own data
BIO_BOUNCED 5 bio is a bounce bio
BIO_USER_MAPPED 6 contains user pages
BIO_EOPNOTSUPP 7 not supported
</p></dd><dt><span class="term"><em class="parameter"><code>devname</code></em></span></dt><dd><p>
block device name
</p></dd><dt><span class="term"><em class="parameter"><code>phys_segments</code></em></span></dt><dd><p>
number of segments in this bio after physical address coalescing is performed.
</p></dd><dt><span class="term"><em class="parameter"><code>sector</code></em></span></dt><dd><p>
beginning sector for the entire bio
</p></dd><dt><span class="term"><em class="parameter"><code>name</code></em></span></dt><dd><p>
name of the probe point
</p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
total size in bytes
</p></dd><dt><span class="term"><em class="parameter"><code>vcnt</code></em></span></dt><dd><p>
bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
</p></dd><dt><span class="term"><em class="parameter"><code>bytes_done</code></em></span></dt><dd><p>
number of bytes transferred
</p></dd><dt><span class="term"><em class="parameter"><code>error</code></em></span></dt><dd><p>
0 on success
</p></dd><dt><span class="term"><em class="parameter"><code>idx</code></em></span></dt><dd><p>
offset into the bio vector array
</p></dd><dt><span class="term"><em class="parameter"><code>hw_segments</code></em></span></dt><dd><p>
number of segments after physical and DMA remapping hardware coalescing is performed
</p></dd><dt><span class="term"><em class="parameter"><code>ino</code></em></span></dt><dd><p>
i-node number of the mapped file
</p></dd><dt><span class="term"><em class="parameter"><code>rw</code></em></span></dt><dd><p>
binary trace for read/write request
</p></dd></dl></div></div><div class="refsect1" title="Context"><a name="idp6789472"></a><h2>Context</h2><p>
The process signals the transfer is done.
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