<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>dev_getbyhwaddr_rcu</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs"><link rel="up" href="netdev.html#idp311795020" title="Driver Support"><link rel="prev" href="API-dev-get-by-index.html" title="dev_get_by_index"><link rel="next" href="API---dev-get-by-flags.html" title="__dev_get_by_flags"></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">dev_getbyhwaddr_rcu</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-dev-get-by-index.html">Prev</a> </td><th width="60%" align="center">Driver Support</th><td width="20%" align="right"> <a accesskey="n" href="API---dev-get-by-flags.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-dev-getbyhwaddr-rcu"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>dev_getbyhwaddr_rcu —
find a device by its hardware address
</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">struct net_device * <b class="fsfunc">dev_getbyhwaddr_rcu </b>(</code></td><td>struct net * <var class="pdparam">net</var>, </td></tr><tr><td> </td><td>unsigned short <var class="pdparam">type</var>, </td></tr><tr><td> </td><td>const char * <var class="pdparam">ha</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idp311901484"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><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>type</code></em></span></dt><dd><p>
media type of device
</p></dd><dt><span class="term"><em class="parameter"><code>ha</code></em></span></dt><dd><p>
hardware address
</p></dd></dl></div></div><div class="refsect1"><a name="idp311905116"></a><h2>Description</h2><p>
Search for an interface by MAC address. Returns NULL if the device
is not found or a pointer to the device.
The caller must hold RCU or RTNL.
The returned device has not had its ref count increased
and the caller must therefore be careful about locking
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