Tests may wish to add other interfaces to listen on. Notably locally generated traffic uses dummy interfaces. The multicast daemon needs to know about these so that it allows forming rules that involve these interfaces, and so that net.ipv4.conf.X.mc_forwarding is set for the interfaces.

To that end, allow passing in a list of interfaces to configure in addition to all the physical ones.

Signed-off-by: Petr Machata petrm@nvidia.com ---

Notes: CC: Shuah Khan shuah@kernel.org CC: linux-kselftest@vger.kernel.org

tools/testing/selftests/net/forwarding/lib.sh | 12 ++++++++++++ 1 file changed, 12 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 88e63562f5c5..5f144d75167a 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1760,6 +1760,8 @@ mc_send()

adf_mcd_start() { + local ifs=("$@") + local if local i

check_command $MCD || return 1 @@ -1775,6 +1777,16 @@ adf_mcd_start() $smcroutedir/$table_name.conf done

+ for if in ${ifs[@]}; do + if ! ip_link_has_flag "$if" MULTICAST; then + ip link set dev "$if" multicast on + defer ip link set dev "$if" multicast off + fi + + echo "phyint $if enable" >> \ + $smcroutedir/$table_name.conf + done + $MCD -N -I $table_name -f $smcroutedir/$table_name.conf \ -P $smcroutedir/$table_name.pid busywait "$BUSYWAIT_TIMEOUT" test -e $smcroutedir/$table_name.pid