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Date: Fri, 28 Jul 2023 17:08:05 +0200
From: Adrian Moreno <amorenoz@...hat.com>
To: Aaron Conole <aconole@...hat.com>, netdev@...r.kernel.org
Cc: dev@...nvswitch.org, linux-kernel@...r.kernel.org,
Ilya Maximets <i.maximets@....org>, Eric Dumazet <edumazet@...gle.com>,
linux-kselftest@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
"David S. Miller" <davem@...emloft.net>
Subject: Re: [ovs-dev] [PATCH v2 net-next 4/5] selftests: openvswitch: add
basic ct test case parsing
On 7/28/23 13:59, Aaron Conole wrote:
> Forwarding via ct() action is an important use case for openvswitch, but
> generally would require using a full ovs-vswitchd to get working. Add a
> ct action parser for basic ct test case.
>
> Signed-off-by: Aaron Conole <aconole@...hat.com>
Reviewed-by: Adrian Moreno <amorenoz@...hat.com>
> ---
> NOTE: 3 lines flag the line-length checkpatch warning, but there didnt
> seem to be a really good way of breaking the lines smaller.
>
> .../selftests/net/openvswitch/openvswitch.sh | 68 +++++++++++++++++++
> .../selftests/net/openvswitch/ovs-dpctl.py | 39 +++++++++++
> 2 files changed, 107 insertions(+)
>
> diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh
> index 5d60a9466dab..40a66c72af0f 100755
> --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh
> +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh
> @@ -12,6 +12,7 @@ TRACING=0
>
> tests="
> arp_ping eth-arp: Basic arp ping between two NS
> + ct_connect_v4 ip4-ct-xon: Basic ipv4 tcp connection using ct
> connect_v4 ip4-xon: Basic ipv4 ping between two NS
> netlink_checks ovsnl: validate netlink attrs and settings
> upcall_interfaces ovs: test the upcall interfaces"
> @@ -193,6 +194,73 @@ test_arp_ping () {
> return 0
> }
>
> +# ct_connect_v4 test
> +# - client has 1500 byte MTU
> +# - server has 1500 byte MTU
> +# - use ICMP to ping in each direction
> +# - only allow CT state stuff to pass through new in c -> s
> +test_ct_connect_v4 () {
> +
> + which nc >/dev/null 2>/dev/null || return $ksft_skip
> +
> + sbx_add "test_ct_connect_v4" || return $?
> +
> + ovs_add_dp "test_ct_connect_v4" ct4 || return 1
> + info "create namespaces"
> + for ns in client server; do
> + ovs_add_netns_and_veths "test_ct_connect_v4" "ct4" "$ns" \
> + "${ns:0:1}0" "${ns:0:1}1" || return 1
> + done
> +
> + ip netns exec client ip addr add 172.31.110.10/24 dev c1
> + ip netns exec client ip link set c1 up
> + ip netns exec server ip addr add 172.31.110.20/24 dev s1
> + ip netns exec server ip link set s1 up
> +
> + # Add forwarding for ARP and ip packets - completely wildcarded
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'ct_state(-trk),eth(),eth_type(0x0800),ipv4()' \
> + 'ct(commit),recirc(0x1)' || return 1
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'recirc_id(0x1),ct_state(+trk+new),in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10)' \
> + '2' || return 1
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'recirc_id(0x1),ct_state(+trk+est),in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10)' \
> + '2' || return 1
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'recirc_id(0x1),ct_state(+trk+est),in_port(2),eth(),eth_type(0x0800),ipv4(dst=172.31.110.10)' \
> + '1' || return 1
> + ovs_add_flow "test_ct_connect_v4" ct4 \
> + 'recirc_id(0x1),ct_state(+trk+inv),eth(),eth_type(0x0800),ipv4()' 'drop' || \
> + return 1
> +
> + # do a ping
> + ovs_sbx "test_ct_connect_v4" ip netns exec client ping 172.31.110.20 -c 3 || return 1
> +
> + # create an echo server in 'server'
> + echo "server" | \
> + ovs_netns_spawn_daemon "test_ct_connect_v4" "server" \
> + nc -lvnp 4443
> + ovs_sbx "test_ct_connect_v4" ip netns exec client nc -i 1 -zv 172.31.110.20 4443 || return 1
> +
> + # Now test in the other direction (should fail)
> + echo "client" | \
> + ovs_netns_spawn_daemon "test_ct_connect_v4" "client" \
> + nc -lvnp 4443
> + ovs_sbx "test_ct_connect_v4" ip netns exec client nc -i 1 -zv 172.31.110.10 4443
> + if [ $? == 0 ]; then
> + info "ct connect to client was successful"
> + return 1
> + fi
> +
> + info "done..."
> + return 0
> +}
> +
> # connect_v4 test
> # - client has 1500 byte MTU
> # - server has 1500 byte MTU
> diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
> index 2b869e89c51d..6e258ab9e635 100644
> --- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
> +++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
> @@ -62,6 +62,15 @@ def macstr(mac):
> return outstr
>
>
> +def strcspn(str1, str2):
> + tot = 0
> + for char in str1:
> + if str2.find(char) != -1:
> + return tot
> + tot += 1
> + return tot
> +
> +
> def strspn(str1, str2):
> tot = 0
> for char in str1:
> @@ -496,6 +505,36 @@ class ovsactions(nla):
> actstr = actstr[strspn(actstr, ", ") :]
> parsed = True
>
> + if parse_starts_block(actstr, "ct(", False):
> + actstr = actstr[len("ct(") :]
> + ctact = ovsactions.ctact()
> +
> + for scan in (
> + ("commit", "OVS_CT_ATTR_COMMIT", None),
> + ("force_commit", "OVS_CT_ATTR_FORCE_COMMIT", None),
> + ("zone", "OVS_CT_ATTR_ZONE", int),
> + ("mark", "OVS_CT_ATTR_MARK", int),
> + ("helper", "OVS_CT_ATTR_HELPER", lambda x, y: str(x)),
> + ("timeout", "OVS_CT_ATTR_TIMEOUT", lambda x, y: str(x)),
> + ):
> + if actstr.startswith(scan[0]):
> + actstr = actstr[len(scan[0]) :]
> + if scan[2] is not None:
> + if actstr[0] != "=":
> + raise ValueError("Invalid ct attr")
> + actstr = actstr[1:]
> + pos = strcspn(actstr, ",)")
> + datum = scan[2](actstr[:pos], 0)
> + ctact["attrs"].append([scan[1], datum])
> + actstr = actstr[pos:]
> + else:
> + ctact["attrs"].append([scan[1], None])
> + actstr = actstr[strspn(actstr, ", ") :]
> +
> + self["attrs"].append(["OVS_ACTION_ATTR_CT", ctact])
> + parsed = True
> +
> + actstr = actstr[strspn(actstr, "), ") :]
> if not parsed:
> raise ValueError("Action str: '%s' not supported" % actstr)
>
--
Adrián Moreno
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