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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>__dev_get_by_index</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs" /><link rel="up" href="ch02.html#id2714553" title="Driver Support" /><link rel="prev" href="re203.html" title="dev_get_by_name" /><link rel="next" href="re205.html" title="dev_get_by_index" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>__dev_get_by_index</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re203.html">Prev</a> </td><th width="60%" align="center">Driver Support</th><td width="20%" align="right"> <a accesskey="n" href="re205.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="__dev_get_by_index"><a id="API---dev-get-by-index"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__dev_get_by_index —
find a device by its ifindex
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">struct net_device * <b class="fsfunc">__dev_get_by_index </b>(</code></td><td>struct net * <var class="pdparam">net</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">ifindex</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2715462"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>net</code></em></span></dt><dd><p>
the applicable net namespace
</p></dd><dt><span class="term"><em class="parameter"><code>ifindex</code></em></span></dt><dd><p>
index of device
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2715506"></a><h2>Description</h2><p>
Search for an interface by index. Returns <code class="constant">NULL</code> if the device
is not found or a pointer to the device. The device has not
had its reference counter increased so the caller must be careful
about locking. The caller must hold either the RTNL semaphore
or <em class="parameter"><code>dev_base_lock</code></em>.
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