selftests: tc-testing: add u32 node ID pool exhaustion test

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Add a tdc test case that fills the u32 node ID space with 4095
auto-generated handles, then attempts to add a 4096th. On the fixed
kernel the 4096th filter is rejected with ENOSPC (exit 2). On the
unfixed kernel it silently succeeds with a duplicate handle.

The setup pipes the 4095 add commands directly into `tc -b -` inside a
single bash -c (matching the existing test id 1234 pattern), avoiding
any temp file.

Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20260825081052.133898-2-jhs@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jamal Hadi Salim 2026-08-25 04:10:52 -04:00 • committed by Jakub Kicinski

parent d7e7e98d23

commit 7b120a7719

1 changed files with 23 additions and 0 deletions

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tools/testing/selftests/tc-testing/tc-tests/filters/u32.json

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