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From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [DPDK/ethdev Bug 1880] tap: control operations fail if device renamed
Date: Sun, 15 Feb 2026 18:01:17 +0000
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X-Bugzilla-Product: DPDK
X-Bugzilla-Component: ethdev
X-Bugzilla-Version: 25.11
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: stephen@networkplumber.org
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http://bugs.dpdk.org/show_bug.cgi?id=3D1880

            Bug ID: 1880
           Summary: tap: control operations fail if device renamed
           Product: DPDK
           Version: 25.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: stephen@networkplumber.org
  Target Milestone: ---

The existing TAP PMD code relies on using ifname to track the kernel device.
This is fragile since name can change without DPDK knowing.

Robin raised the issue with netns() usage and containers but the problem is
more general. PMD needs to only use ifindex to find kernel device, then the
special netns code can be removed.

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