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<base href="https://bugs.dpdk.org/">
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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - tap device does not support multiple flow rules with same priority"
href="https://bugs.dpdk.org/show_bug.cgi?id=1382">1382</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>tap device does not support multiple flow rules with same priority
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>23.11
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>ethdev
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>stephen@networkplumber.org
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">Internally TAP device appears to be using priority as TC index. Which leads to
the following buggy behavior. Drivers should allow multiple flow rules with
same priority.
testpmd> flow create 0 priority 2 ingress pattern eth src is 06:05:04:03:02:01
/ end actions queue index 2 / end
Flow rule #0 created
testpmd> flow create 0 priority 2 ingress pattern eth src is 06:05:04:03:02:00
/ end actions queue index 3 / end
tap_nl_dump_ext_ack(): Filter already exists
tap_flow_create(): Kernel refused TC filter rule creation (17): File exists
port_flow_complain(): Caught PMD error type 2 (flow rule (handle)): overlapping
rules or Kernel too old for flower support: File exists
</pre>
</div>
</p>
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