Commit 58f8ef62 authored by Ido Schimmel's avatar Ido Schimmel Committed by Jakub Kicinski
Browse files

selftests: team: Add a reference count leak test 



Add a test for the issue that was fixed in "team: avoid NETDEV_CHANGEMTU
event when unregistering slave".

The test hangs due to a reference count leak without the fix:

 # make -C tools/testing/selftests TARGETS="drivers/net/team" TEST_PROGS=refleak.sh TEST_GEN_PROGS="" run_tests
 [...]
 TAP version 13
 1..1
 # timeout set to 45
 # selftests: drivers/net/team: refleak.sh
 [   50.681299][  T496] unregister_netdevice: waiting for dummy1 to become free. Usage count = 3
 [   71.185325][  T496] unregister_netdevice: waiting for dummy1 to become free. Usage count = 3

And passes with the fix:

 # make -C tools/testing/selftests TARGETS="drivers/net/team" TEST_PROGS=refleak.sh TEST_GEN_PROGS="" run_tests
 [...]
 TAP version 13
 1..1
 # timeout set to 45
 # selftests: drivers/net/team: refleak.sh
 ok 1 selftests: drivers/net/team: refleak.sh

Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
Acked-by: default avatarStanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260224125709.317574-3-idosch@nvidia.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent bb4c6986

tools/testing/selftests/drivers/net/team/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ TEST_PROGS := \ 
	dev_addr_lists.sh \

	options.sh \

	propagation.sh \

	refleak.sh \

# end of TEST_PROGS



TEST_INCLUDES := \

tools/testing/selftests/drivers/net/team/refleak.sh

0 → 100755
+17 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

# shellcheck disable=SC2154



lib_dir=$(dirname "$0")

source "$lib_dir"/../../../net/lib.sh



trap cleanup_all_ns EXIT



# Test that there is no reference count leak and that dummy1 can be deleted.

# https://lore.kernel.org/netdev/4d69abe1-ca8d-4f0b-bcf8-13899b211e57@I-love.SAKURA.ne.jp/

setup_ns ns1 ns2

ip -n "$ns1" link add name team1 type team

ip -n "$ns1" link add name dummy1 mtu 1499 type dummy

ip -n "$ns1" link set dev dummy1 master team1

ip -n "$ns1" link set dev dummy1 netns "$ns2"

ip -n "$ns2" link del dev dummy1