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selftests: mlxsw: sch_red_ets: Test proper counter cleaning in ETS 

There was a bug introduced during the rework which cause non-zero backlog
being stuck at ETS. Introduce a selftest that would have caught the issue
earlier.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2021-04-20 16:53:48 +02:00 committed by David S. Miller
parent 7de85b0431
commit 0a4d0cb1a3
1 changed files with 7 additions and 0 deletions
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7
tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
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@ -67,6 +67,13 @@ red_test()
{
install_qdisc
# Make sure that we get the non-zero value if there is any.
local cur=$(busywait 1100 until_counter_is "> 0" \
qdisc_stats_get $swp3 10: .backlog)
(( cur == 0 ))
check_err $? "backlog of $cur observed on non-busy qdisc"
log_test "$QDISC backlog properly cleaned"
do_red_test 10 $BACKLOG1
do_red_test 11 $BACKLOG2