Commit dfb429ea authored by David Wei's avatar David Wei Committed by David S. Miller
Browse files

netdevsim: add selftest for forwarding skb between connected ports 



Connect two netdevsim ports in different namespaces together, then send
packets between them using socat.

Signed-off-by: default avatarDavid Wei <dw@davidwei.uk>
Reviewed-by: default avatarMaciek Machnikowski <maciek@machnikowski.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8debcf58

tools/testing/selftests/drivers/net/netdevsim/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ TEST_PROGS = devlink.sh \ 
	fib.sh \

	hw_stats_l3.sh \

	nexthop.sh \

	peer.sh \

	psample.sh \

	tc-mq-visibility.sh \

	udp_tunnel_nic.sh \

tools/testing/selftests/drivers/net/netdevsim/peer.sh

0 → 100755
+143 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0-only



source ../../../net/net_helper.sh



NSIM_DEV_1_ID=$((256 + RANDOM % 256))

NSIM_DEV_1_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_DEV_1_ID

NSIM_DEV_2_ID=$((512 + RANDOM % 256))

NSIM_DEV_2_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_DEV_2_ID



NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device

NSIM_DEV_SYS_DEL=/sys/bus/netdevsim/del_device

NSIM_DEV_SYS_LINK=/sys/bus/netdevsim/link_device

NSIM_DEV_SYS_UNLINK=/sys/bus/netdevsim/unlink_device



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



	NSIM_DEV_1_NAME=$(find $NSIM_DEV_1_SYS/net -maxdepth 1 -type d ! \

		-path $NSIM_DEV_1_SYS/net -exec basename {} \;)

	NSIM_DEV_2_NAME=$(find $NSIM_DEV_2_SYS/net -maxdepth 1 -type d ! \

		-path $NSIM_DEV_2_SYS/net -exec basename {} \;)



	ip link set $NSIM_DEV_1_NAME netns nssv

	ip link set $NSIM_DEV_2_NAME netns nscl



	ip netns exec nssv ip addr add '192.168.1.1/24' dev $NSIM_DEV_1_NAME

	ip netns exec nscl ip addr add '192.168.1.2/24' dev $NSIM_DEV_2_NAME



	ip netns exec nssv ip link set dev $NSIM_DEV_1_NAME up

	ip netns exec nscl ip link set dev $NSIM_DEV_2_NAME up

	set +e

}



cleanup_ns()

{

	ip netns del nscl

	ip netns del nssv

}



###

### Code start

###



socat_check || exit 4



modprobe netdevsim



# linking



echo $NSIM_DEV_1_ID > $NSIM_DEV_SYS_NEW

echo $NSIM_DEV_2_ID > $NSIM_DEV_SYS_NEW

udevadm settle



setup_ns



NSIM_DEV_1_FD=$((256 + RANDOM % 256))

exec {NSIM_DEV_1_FD}</var/run/netns/nssv

NSIM_DEV_1_IFIDX=$(ip netns exec nssv cat /sys/class/net/$NSIM_DEV_1_NAME/ifindex)



NSIM_DEV_2_FD=$((256 + RANDOM % 256))

exec {NSIM_DEV_2_FD}</var/run/netns/nscl

NSIM_DEV_2_IFIDX=$(ip netns exec nscl cat /sys/class/net/$NSIM_DEV_2_NAME/ifindex)



echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:2000" > $NSIM_DEV_SYS_LINK 2>/dev/null

if [ $? -eq 0 ]; then

	echo "linking with non-existent netdevsim should fail"

	cleanup_ns

	exit 1

fi



echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX 2000:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK 2>/dev/null

if [ $? -eq 0 ]; then

	echo "linking with non-existent netnsid should fail"

	cleanup_ns

	exit 1

fi



echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > $NSIM_DEV_SYS_LINK 2>/dev/null

if [ $? -eq 0 ]; then

	echo "linking with self should fail"

	cleanup_ns

	exit 1

fi



echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK

if [ $? -ne 0 ]; then

	echo "linking netdevsim1 with netdevsim2 should succeed"

	cleanup_ns

	exit 1

fi



# argument error checking



echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:a" > $NSIM_DEV_SYS_LINK 2>/dev/null

if [ $? -eq 0 ]; then

	echo "invalid arg should fail"

	cleanup_ns

	exit 1

fi



# send/recv packets



tmp_file=$(mktemp)

ip netns exec nssv socat TCP-LISTEN:1234,fork $tmp_file &

pid=$!

res=0



wait_local_port_listen nssv 1234 tcp



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"

	res=1

fi



echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > $NSIM_DEV_SYS_UNLINK



echo $NSIM_DEV_2_ID > $NSIM_DEV_SYS_DEL



kill $pid

echo $NSIM_DEV_1_ID > $NSIM_DEV_SYS_DEL



cleanup_ns



modprobe -r netdevsim



exit $res