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selftests: forwarding: Skip test when no interfaces are specified

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commit d72c83b1e4b4a36a38269c77a85ff52f95eb0d08 upstream.

As explained in [1], the forwarding selftests are meant to be run with
either physical loopbacks or veth pairs. The interfaces are expected to
be specified in a user-provided forwarding.config file or as command
line arguments. By default, this file is not present and the tests fail:

 # make -C tools/testing/selftests TARGETS=net/forwarding run_tests
 [...]
 TAP version 13
 1..102
 # timeout set to 45
 # selftests: net/forwarding: bridge_igmp.sh
 # Command line is not complete. Try option "help"
 # Failed to create netif
 not ok 1 selftests: net/forwarding: bridge_igmp.sh # exit=1
 [...]

Fix by skipping a test if interfaces are not provided either via the
configuration file or command line arguments.

 # make -C tools/testing/selftests TARGETS=net/forwarding run_tests
 [...]
 TAP version 13
 1..102
 # timeout set to 45
 # selftests: net/forwarding: bridge_igmp.sh
 # SKIP: Cannot create interface. Name not specified
 ok 1 selftests: net/forwarding: bridge_igmp.sh # SKIP

[1] tools/testing/selftests/net/forwarding/README

Fixes: 81573b18f2 ("selftests/net/forwarding: add Makefile to install tests")
Reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Closes: https://lore.kernel.org/netdev/856d454e-f83c-20cf-e166-6dc06cbc1543@alu.unizg.hr/
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Tested-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20230808141503.4060661-2-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ido Schimmel 2023-08-08 17:14:47 +03:00 committed by Greg Kroah-Hartman
parent 9ff7465b91
commit 2df0e43735
1 changed files with 5 additions and 0 deletions
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5
tools/testing/selftests/net/forwarding/lib.sh
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@ -211,6 +211,11 @@ create_netif_veth()
for ((i = 1; i <= NUM_NETIFS; ++i)); do
local j=$((i+1))
if [ -z ${NETIFS[p$i]} ]; then
echo "SKIP: Cannot create interface. Name not specified"
exit $ksft_skip
fi
ip link show dev ${NETIFS[p$i]} &> /dev/null
if [[ $? -ne 0 ]]; then
ip link add ${NETIFS[p$i]} type veth \