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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>pskb_copy</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="ch01s02.html" title="Socket Buffer Functions" /><link rel="prev" href="re70.html" title="skb_copy" /><link rel="next" href="re72.html" title="pskb_expand_head" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>pskb_copy</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re70.html">Prev</a> </td><th width="60%" align="center">Socket Buffer Functions</th><td width="20%" align="right"> <a accesskey="n" href="re72.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="pskb_copy"><a id="API-pskb-copy"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>pskb_copy —
create copy of an sk_buff with private head.
</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 sk_buff * <b class="fsfunc">pskb_copy </b>(</code></td><td>struct sk_buff * <var class="pdparam">skb</var>, </td></tr><tr><td> </td><td>gfp_t <var class="pdparam">gfp_mask</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2694092"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>skb</code></em></span></dt><dd><p>
buffer to copy
</p></dd><dt><span class="term"><em class="parameter"><code>gfp_mask</code></em></span></dt><dd><p>
allocation priority
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2694134"></a><h2>Description</h2><p>
Make a copy of both an <span class="structname">sk_buff</span> and part of its data, located
in header. Fragmented data remain shared. This is used when
the caller wishes to modify only header of <span class="structname">sk_buff</span> and needs
private copy of the header to alter. Returns <code class="constant">NULL</code> on failure
or the pointer to the buffer on success.
The returned buffer has a reference count of 1.
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