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<h1>Packet/Bytes FIFO (pfifo/bfifo)</h1> </div>
<div class="ingroups"><a class="el" href="group__qdisc__api.html">Queueing Discipline Modules</a></div></div>
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<p>The FIFO qdisc comes in two flavours:
<a href="#_details">More...</a></p>
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Attribute Modification</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__fifo.html#gac3de03e9d829b5d884b52c668e972c1e">rtnl_qdisc_fifo_set_limit</a> (struct rtnl_qdisc *qdisc, int limit)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set limit of FIFO qdisc. <a href="#gac3de03e9d829b5d884b52c668e972c1e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__fifo.html#ga4cf9cc1e906d5459af88869e5cbbe06d">rtnl_qdisc_fifo_get_limit</a> (struct rtnl_qdisc *qdisc)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get limit of a FIFO qdisc. <a href="#ga4cf9cc1e906d5459af88869e5cbbe06d"></a><br/></td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<dl class="user"><dt><b>bfifo (Byte FIFO)</b></dt><dd>Allows enqueuing until the currently queued volume in bytes exceeds the configured limit.backlog contains currently enqueued volume in bytes.</dd></dl>
<dl class="user"><dt><b>pfifo (Packet FIFO)</b></dt><dd>Allows enquueing until the currently queued number of packets exceeds the configured limit.</dd></dl>
<p>The configuration is exactly the same, the decision which of the two variations is going to be used is made based on the kind of the qdisc (rtnl_qdisc_set_kind()). </p>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gac3de03e9d829b5d884b52c668e972c1e"></a><!-- doxytag: member="fifo.c::rtnl_qdisc_fifo_set_limit" ref="gac3de03e9d829b5d884b52c668e972c1e" args="(struct rtnl_qdisc *qdisc, int limit)" -->
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<td class="memname">int rtnl_qdisc_fifo_set_limit </td>
<td>(</td>
<td class="paramtype">struct rtnl_qdisc * </td>
<td class="paramname"><em>qdisc</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>limit</em> </td>
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<td></td>
<td>)</td>
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<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">qdisc</td><td>FIFO qdisc to be modified. </td></tr>
<tr><td class="paramname">limit</td><td>New limit. </td></tr>
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</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success or a negative error code. </dd></dl>
<p>Definition at line <a class="el" href="fifo_8c_source.html#l00145">145</a> of file <a class="el" href="fifo_8c_source.html">fifo.c</a>.</p>
<div class="fragment"><pre class="fragment">{
<span class="keyword">struct </span>rtnl_fifo *fifo;
fifo = fifo_alloc(qdisc);
<span class="keywordflow">if</span> (!fifo)
<span class="keywordflow">return</span> nl_errno(ENOMEM);
fifo->qf_limit = limit;
fifo->qf_mask |= SCH_FIFO_ATTR_LIMIT;
<span class="keywordflow">return</span> 0;
}
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<a class="anchor" id="ga4cf9cc1e906d5459af88869e5cbbe06d"></a><!-- doxytag: member="fifo.c::rtnl_qdisc_fifo_get_limit" ref="ga4cf9cc1e906d5459af88869e5cbbe06d" args="(struct rtnl_qdisc *qdisc)" -->
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<td class="memname">int rtnl_qdisc_fifo_get_limit </td>
<td>(</td>
<td class="paramtype">struct rtnl_qdisc * </td>
<td class="paramname"><em>qdisc</em></td><td>)</td>
<td></td>
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<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">qdisc</td><td>FIFO qdisc. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Numeric limit or a negative error code. </dd></dl>
<p>Definition at line <a class="el" href="fifo_8c_source.html#l00164">164</a> of file <a class="el" href="fifo_8c_source.html">fifo.c</a>.</p>
<div class="fragment"><pre class="fragment">{
<span class="keyword">struct </span>rtnl_fifo *fifo;
fifo = fifo_qdisc(qdisc);
<span class="keywordflow">if</span> (fifo && fifo->qf_mask & SCH_FIFO_ATTR_LIMIT)
<span class="keywordflow">return</span> fifo->qf_limit;
<span class="keywordflow">else</span>
<span class="keywordflow">return</span> nl_errno(ENOMEM);
}
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