Commit aab1272f authored by Adrian Moreno's avatar Adrian Moreno Committed by David S. Miller
Browse files

selftests: openvswitch: add drop reason testcase 



Test if the correct drop reason is reported when OVS drops a packet due
to an explicit flow.

Acked-by: default avatarAaron Conole <aconole@redhat.com>
Signed-off-by: default avatarAdrian Moreno <amorenoz@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 43d95b30

tools/testing/selftests/net/openvswitch/openvswitch.sh

+66 −1
Original line number Diff line number Diff line
@@ -16,7 +16,8 @@ tests=" 
	connect_v4				ip4-xon: Basic ipv4 ping between two NS

	nat_connect_v4				ip4-nat-xon: Basic ipv4 tcp connection via NAT

	netlink_checks				ovsnl: validate netlink attrs and settings

	upcall_interfaces			ovs: test the upcall interfaces"

	upcall_interfaces			ovs: test the upcall interfaces

	drop_reason				drop: test drop reasons are emitted"



info() {

    [ $VERBOSE = 0 ] || echo $*
@@ -141,6 +142,25 @@ ovs_add_flow () { 
	return 0

}



ovs_drop_record_and_run () {

	local sbx=$1

	shift



	perf record -a -q -e skb:kfree_skb -o ${ovs_dir}/perf.data $* \

		>> ${ovs_dir}/stdout 2>> ${ovs_dir}/stderr

	return $?

}



ovs_drop_reason_count()

{

	local reason=$1



	local perf_output=`perf script -i ${ovs_dir}/perf.data -F trace:event,trace`

	local pattern="skb:kfree_skb:.*reason: $reason"



	return `echo "$perf_output" | grep "$pattern" | wc -l`

}



usage() {

	echo

	echo "$0 [OPTIONS] [TEST]..."
@@ -155,6 +175,51 @@ usage() { 
	exit 1

}



# drop_reason test

# - drop packets and verify the right drop reason is reported

test_drop_reason() {

	which perf >/dev/null 2>&1 || return $ksft_skip



	sbx_add "test_drop_reason" || return $?



	ovs_add_dp "test_drop_reason" dropreason || return 1



	info "create namespaces"

	for ns in client server; do

		ovs_add_netns_and_veths "test_drop_reason" "dropreason" "$ns" \

			"${ns:0:1}0" "${ns:0:1}1" || return 1

	done



	# Setup client namespace

	ip netns exec client ip addr add 172.31.110.10/24 dev c1

	ip netns exec client ip link set c1 up



	# Setup server namespace

	ip netns exec server ip addr add 172.31.110.20/24 dev s1

	ip netns exec server ip link set s1 up



	# Allow ARP

	ovs_add_flow "test_drop_reason" dropreason \

		'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1

	ovs_add_flow "test_drop_reason" dropreason \

		'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1



	# Allow client ICMP traffic but drop return path

	ovs_add_flow "test_drop_reason" dropreason \

		"in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10,proto=1),icmp()" '2'

	ovs_add_flow "test_drop_reason" dropreason \

		"in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20,proto=1),icmp()" 'drop'



	ovs_drop_record_and_run "test_drop_reason" ip netns exec client ping -c 2 172.31.110.20

	ovs_drop_reason_count 0x30001 # OVS_DROP_FLOW_ACTION

	if [[ "$?" -ne "2" ]]; then

		info "Did not detect expected drops: $?"

		return 1

	fi



	return 0

}



# arp_ping test

# - client has 1500 byte MTU

# - server has 1500 byte MTU