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selftests: openvswitch: add drop reason testcase

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

Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Adrian Moreno 2023-08-11 16:12:53 +02:00 committed by David S. Miller
parent 43d95b30cf
commit aab1272f5d
1 changed files with 66 additions and 1 deletions
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67
tools/testing/selftests/net/openvswitch/openvswitch.sh
View file

@ -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