selftests: forwarding: Add suppport to create veth interfaces

For tests using veth interfaces, the test infrastructure can create
the netdevs if they do not exist. Arguably this is a preferred approach
since the tests require p$N and p$(N+1) to be pairs.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/forwarding.config.sample b/tools/testing/selftests/net/forwarding/forwarding.config.sample
index ab235c1..df54c9e 100644 (file)
--- a/tools/testing/selftests/net/forwarding/forwarding.config.sample
+++ b/tools/testing/selftests/net/forwarding/forwarding.config.sample
@@ -14,6 +14,11 @@ NETIFS[p6]=veth5
 NETIFS[p7]=veth6
 NETIFS[p8]=veth7
 
+NETIF_TYPE=veth
+
+# only virtual interfaces (veth) can be created by test infra
+#NETIF_CREATE=yes
+
 ##############################################################################
 # Defines
 

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index d0af521..273511e 100644 (file)
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -76,6 +76,41 @@ done
 ##############################################################################
 # Network interfaces configuration
 
+create_netif_veth()
+{
+       local i
+
+       for i in $(eval echo {1..$NUM_NETIFS}); do
+               local j=$((i+1))
+
+               ip link show dev ${NETIFS[p$i]} &> /dev/null
+               if [[ $? -ne 0 ]]; then
+                       ip link add ${NETIFS[p$i]} type veth \
+                               peer name ${NETIFS[p$j]}
+                       if [[ $? -ne 0 ]]; then
+                               echo "Failed to create netif"
+                               exit 1
+                       fi
+               fi
+               i=$j
+       done
+}
+
+create_netif()
+{
+       case "$NETIF_TYPE" in
+       veth) create_netif_veth
+             ;;
+       *) echo "Can not create interfaces of type \'$NETIF_TYPE\'"
+          exit 1
+          ;;
+       esac
+}
+
+if [[ "$NETIF_CREATE" = "yes" ]]; then
+       create_netif
+fi
+
 for i in $(eval echo {1..$NUM_NETIFS}); do
        ip link show dev ${NETIFS[p$i]} &> /dev/null
        if [[ $? -ne 0 ]]; then