On 2/27/26 9:29 AM, David Marchand via dev wrote:
> Instead of dropping we can switch to software segmentation before
> encapsulating packets already encapsulated in a tunnel.
>
> Signed-off-by: David Marchand <[email protected]>
> ---
> lib/netdev.c | 56 +++++++++++++++++-----------------
> tests/dpif-netdev.at | 71 ++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 100 insertions(+), 27 deletions(-)
[...]
> diff --git a/tests/dpif-netdev.at b/tests/dpif-netdev.at
> index b4eb64ffd0..4adef9428f 100644
> --- a/tests/dpif-netdev.at
> +++ b/tests/dpif-netdev.at
> @@ -3436,6 +3436,77 @@ AT_CHECK([ovs-vsctl get interface p2
> statistics:tx_packets], [0], [35
> OVS_VSWITCHD_STOP
> AT_CLEANUP
>
> +AT_SETUP([dpif-netdev - tso + dual tunnel encap])
> +AT_KEYWORDS([userspace offload])
> +OVS_VSWITCHD_START(
> + [set Open_vSwitch . other_config:userspace-tso-enable=true -- \
> + add-br br1 -- set bridge br1 datapath-type=dummy -- \
> + add-port br1 p1 -- \
> + set Interface p1 type=dummy -- \
> + add-br br2 -- set bridge br2 datapath-type=dummy -- \
> + set bridge br2 other-config:hwaddr=aa:66:aa:66:00:00 -- \
> + add-port br2 p2 -- \
> + set Interface p2 type=dummy -- \
> + add-br br3 -- set bridge br3 datapath-type=dummy -- \
> + set bridge br3 other-config:hwaddr=aa:66:bb:66:00:00 -- \
> + add-port br3 p3 -- \
> + set Interface p3 type=dummy])
> +
> +AT_CHECK([ovs-vsctl add-port br1 t1 \
> + -- set Interface t1 type=vxlan \
> + options:remote_ip=1.1.2.92 options:key=123 \
> + ofport_request=11], [0])
> +AT_CHECK([ovs-vsctl add-port br2 t2 \
> + -- set Interface t2 type=vxlan \
> + options:remote_ip=1.1.3.92 options:key=456 \
> + ofport_request=21], [0])
> +
> +AT_CHECK([ovs-ofctl del-flows br1])
> +AT_CHECK([ovs-ofctl add-flow br1 in_port=p1,actions=output:11])
> +AT_CHECK([ovs-ofctl del-flows br2])
> +AT_CHECK([ovs-ofctl add-flow br2 in_port=br2,actions=output:21])
> +
> +AT_CHECK([ovs-appctl netdev-dummy/ip4addr br2 1.1.2.88/24], [0], [OK
> +])
> +AT_CHECK([ovs-appctl tnl/neigh/set br2 1.1.2.92 aa:66:aa:66:00:01], [0], [OK
> +])
> +AT_CHECK([ovs-appctl netdev-dummy/ip4addr br3 1.1.3.88/24], [0], [OK
> +])
> +AT_CHECK([ovs-appctl tnl/neigh/set br3 1.1.3.92 aa:66:bb:66:00:01], [0], [OK
> +])
> +
> +AT_CHECK([ovs-vsctl set Interface p1 options:ol_tso_segsz=1000])
> +
> +flow_s="in_port(1),eth(src=50:54:00:00:00:05,dst=50:54:00:00:01:00),eth_type(0x0800),
> \
> + ipv4(src=10.0.1.1,dst=10.0.0.1,proto=6,tos=0,ttl=64,frag=no), \
> + tcp(src=1234,dst=80),tcp_flags(ack)"
> +AT_CHECK([ovs-appctl netdev-dummy/receive p1 "${flow_s}" --len 2000])
> +
> +dnl Interface statistics and coverage counters take some time to refresh.
> +OVS_WAIT_UNTIL([test `ovs-vsctl get interface p1 statistics:rx_packets` -eq
> 1])
$()
> +CHECK_COVERAGE([netdev_received], [1])
> +CHECK_COVERAGE([dp_packet_gso], [1])
> +CHECK_COVERAGE([netdev_send_multi], [0])
> +CHECK_COVERAGE([netdev_sent], [1])
> +AT_CHECK([ovs-vsctl get interface p3 statistics:tx_packets], [0], [2
> +])
> +
> +OVS_CHECK_BATCH_GROW([0])
> +AT_CHECK([ovs-appctl netdev-dummy/receive p1 "${flow_s}" --len 35000])
> +
> +OVS_WAIT_UNTIL([test `ovs-vsctl get interface p1 statistics:rx_packets` -eq
> 2])
$()
> +CHECK_COVERAGE([netdev_received], [2])
> +OVS_CHECK_BATCH_GROW([1])
> +CHECK_COVERAGE([dp_packet_gso], [2])
> +CHECK_COVERAGE([dpif_netdev_output_big_batch], [1])
> +CHECK_COVERAGE([netdev_send_multi], [0])
> +CHECK_COVERAGE([netdev_sent], [3])
> +AT_CHECK([ovs-vsctl get interface p3 statistics:tx_packets], [0], [37
> +])
> +
> +OVS_VSWITCHD_STOP
> +AT_CLEANUP
> +
> AT_SETUP([dpif-netdev - revalidators handle dp modification fail correctly])
> OVS_VSWITCHD_START(
> [add-port br0 p1 \
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