[PATCH net-next v2 3/3] netdevsim: add selftest for forwarding skb between connected ports
From: David Wei <hidden>
Date: 2023-12-10 01:04:56
Subsystem:
kernel selftest framework, netdevsim, networking drivers, the rest · Maintainers:
Shuah Khan, Jakub Kicinski, Andrew Lunn, "David S. Miller", Eric Dumazet, Paolo Abeni, Linus Torvalds
From: David Wei <redacted> Connect two netdevsim ports in different namespaces together, then send packets between them using socat. Signed-off-by: David Wei <redacted> --- .../selftests/drivers/net/netdevsim/peer.sh | 111 ++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100755 tools/testing/selftests/drivers/net/netdevsim/peer.sh
diff --git a/tools/testing/selftests/drivers/net/netdevsim/peer.sh b/tools/testing/selftests/drivers/net/netdevsim/peer.sh
new file mode 100755
index 000000000000..d1d59a932174
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/netdevsim/peer.sh@@ -0,0 +1,111 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-only + +NSIM_DEV_SYS=/sys/bus/netdevsim +NSIM_DEV_DFS=/sys/kernel/debug/netdevsim/netdevsim + +socat_check() +{ + if [ ! -x "$(command -v socat)" ]; then + echo "socat command not found. Skipping test" + return 1 + fi + + return 0 +} + +setup_ns() +{ + set -e + ip netns add nssv + ip netns add nscl + + ip link set eni1np1 netns nssv + ip link set eni2np1 netns nscl + + ip netns exec nssv ip addr add '192.168.1.1/24' dev eni1np1 + ip netns exec nscl ip addr add '192.168.1.2/24' dev eni2np1 + + ip netns exec nssv ip link set dev eni1np1 up + ip netns exec nscl ip link set dev eni2np1 up + set +e +} + +cleanup_ns() +{ + ip netns del nscl + ip netns del nssv +} + +### +### Code start +### + +modprobe netdevsim + +# linking + +echo 1 > ${NSIM_DEV_SYS}/new_device + +echo "2 0" > ${NSIM_DEV_DFS}1/ports/0/peer 2>/dev/null +if [ $? -eq 0 ]; then + echo "linking with non-existent netdevsim should fail" + exit 1 +fi + +echo 2 > /sys/bus/netdevsim/new_device + +echo "2 0" > ${NSIM_DEV_DFS}1/ports/0/peer +if [ $? -ne 0 ]; then + echo "linking netdevsim1 port0 with netdevsim2 port0 should succeed" + exit 1 +fi + +# argument error checking + +echo "2 1" > ${NSIM_DEV_DFS}1/ports/0/peer 2>/dev/null +if [ $? -eq 0 ]; then + echo "linking with non-existent port in a netdevsim should fail" + exit 1 +fi + +echo "1 0" > ${NSIM_DEV_DFS}1/ports/0/peer 2>/dev/null +if [ $? -eq 0 ]; then + echo "linking with self should fail" + exit 1 +fi + +echo "2 a" > ${NSIM_DEV_DFS}1/ports/0/peer 2>/dev/null +if [ $? -eq 0 ]; then + echo "invalid arg should fail" + exit 1 +fi + +# send/recv packets + +socat_check || exit 1 + +setup_ns + +tmp_file=$(mktemp) +ip netns exec nssv socat TCP-LISTEN:1234,fork $tmp_file & +pid=$! + +echo "HI" | ip netns exec nscl socat STDIN TCP:192.168.1.1:1234 + +count=$(cat $tmp_file | wc -c) +if [[ $count -ne 3 ]]; then + echo "expected 3 bytes, got $count" + exit 1 +fi + +echo 2 > ${NSIM_DEV_SYS}/del_device + +kill $pid +echo 1 > ${NSIM_DEV_SYS}/del_device + +cleanup_ns + +modprobe -r netdevsim + +exit 0
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2.39.3