The tunnel test leaves behind link devices created by the GRE kernel modules:
$ ip -br link ... gre0@NONE DOWN 0.0.0.0 <NOARP> gretap0@NONE DOWN 00:00:00:00:00:00 <BROADCAST,MULTICAST> erspan0@NONE DOWN 00:00:00:00:00:00 <BROADCAST,MULTICAST> ip6tnl0@NONE DOWN :: <NOARP> ip6gre0@NONE DOWN 00:00:00:00: $ lsmod | grep gre ip6_gre 40960 0 ip6_tunnel 40960 1 ip6_gre ip_gre 32768 0 ip_tunnel 24576 1 ip_gre gre 16384 2 ip6_gre,ip_gre Check beforehand if the gre kernel module is loaded, and if not unload them all at the end of the test. This should avoid causing problems if a user is already using GRE for other purposes. Signed-off-by: Luca Boccassi <bl...@debian.org> Reviewed-by: Petr Vorel <pvo...@suse.cz> --- v2: applied suggestions from Petr to simplify the modules parsing/unloading v3: ditto, added reviewed-by tag testsuite/tests/ip/tunnel/add_tunnel.t | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/testsuite/tests/ip/tunnel/add_tunnel.t b/testsuite/tests/ip/tunnel/add_tunnel.t index 3f5a9d3c..65db431c 100755 --- a/testsuite/tests/ip/tunnel/add_tunnel.t +++ b/testsuite/tests/ip/tunnel/add_tunnel.t @@ -3,6 +3,16 @@ . lib/generic.sh TUNNEL_NAME="tunnel_test_ip" +KMODS="ip6_gre ip6_tunnel ip_gre ip_tunnel gre" + +# unload kernel modules to remove dummy interfaces only if they were not in use beforehand +kmods_remove= +# note that checkbashism reports command -v, but dash supports it and it's POSIX 2008 compliant +if command -v lsmod >/dev/null 2>&1 && command -v rmmod >/dev/null 2>&1; then + for i in $KMODS; do + lsmod | grep -q "^$i" || kmods_remove="$kmods_remove $i"; + done +fi ts_log "[Testing add/del tunnels]" @@ -12,3 +22,6 @@ ts_ip "$0" "Del GRE tunnel over IPv4" tunnel del $TUNNEL_NAME ts_ip "$0" "Add GRE tunnel over IPv6" tunnel add name $TUNNEL_NAME mode ip6gre local dead:beef::1 remote dead:beef::2 ts_ip "$0" "Del GRE tunnel over IPv6" tunnel del $TUNNEL_NAME +for mod in $kmods_remove; do + sudo rmmod "$mod" +done -- 2.19.2
