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selftests: tc-testing: add one test for flushing explicitly created chain

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Add the test for additional reference to chains that are explicitly
created by RTM_NEWCHAIN message.

The test result:

 1..1
 ok 1 c2b4 - soft lockup alarm will be not generated after delete the prio 0
  filter of the chain

This is a follow up to commit c9a82bec02 ("net/sched: cls_api: Fix lockup on flushing explicitly created chain").

Signed-off-by: Mingshuai Ren <renmingshuai@huawei.com>
Acked-by: Pedro Tammela <pctammela@mojatatu.com>
Acked-by: Victor Nogueira <victor@mojatatu.com>
Link: https://lore.kernel.org/r/20230620014939.2034054-1-renmingshuai@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
renmingshuai 2023-06-20 09:49:39 +08:00 committed by Jakub Kicinski
parent 1ca09f5746
commit ca4fa87435
1 changed files with 25 additions and 0 deletions
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25
tools/testing/selftests/tc-testing/tc-tests/infra/filter.json Normal file
View file

@ -0,0 +1,25 @@
[
{
"id": "c2b4",
"name": "soft lockup alarm will be not generated after delete the prio 0 filter of the chain",
"category": [
"filter",
"chain"
],
"setup": [
"$IP link add dev $DUMMY type dummy || /bin/true",
"$TC qdisc add dev $DUMMY root handle 1: htb default 1",
"$TC chain add dev $DUMMY",
"$TC filter del dev $DUMMY chain 0 parent 1: prio 0"
],
"cmdUnderTest": "$TC filter add dev $DUMMY chain 0 parent 1:",
"expExitCode": "2",
"verifyCmd": "$TC chain ls dev $DUMMY",
"matchPattern": "chain parent 1: chain 0",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY root handle 1: htb default 1",
"$IP link del dev $DUMMY type dummy"
]
}
]