[PATCHv2 net-next 5/5] selftests/net: add offload checking test for virtual interface

[Hangbin Liu <liuhangbin@gmail.com>]

make sure the virtual interface offload setting is correct after
changing lower devices.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 tools/testing/selftests/net/Makefile        |   1 +
 tools/testing/selftests/net/config          |   2 +
 tools/testing/selftests/net/vdev_offload.sh | 176 ++++++++++++++++++++
 3 files changed, 179 insertions(+)
 create mode 100755 tools/testing/selftests/net/vdev_offload.sh

diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index eef0b8f8a7b0..e195ab4038a0 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -118,6 +118,7 @@ TEST_PROGS += tfo_passive.sh
 TEST_PROGS += broadcast_pmtu.sh
 TEST_PROGS += ipv6_force_forwarding.sh
 TEST_PROGS += route_hint.sh
+TEST_PROGS += vdev_offload.sh
 
 # YNL files, must be before "include ..lib.mk"
 YNL_GEN_FILES := busy_poller netlink-dumps
diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
index d548611e2698..0f3a64a86474 100644
--- a/tools/testing/selftests/net/config
+++ b/tools/testing/selftests/net/config
@@ -117,6 +117,7 @@ CONFIG_IP_SCTP=m
 CONFIG_NETFILTER_XT_MATCH_POLICY=m
 CONFIG_CRYPTO_ARIA=y
 CONFIG_XFRM_INTERFACE=m
+CONFIG_XFRM_OFFLOAD=y
 CONFIG_XFRM_USER=m
 CONFIG_IP_NF_MATCH_RPFILTER=m
 CONFIG_IP6_NF_MATCH_RPFILTER=m
@@ -128,3 +129,4 @@ CONFIG_NETKIT=y
 CONFIG_NET_PKTGEN=m
 CONFIG_IPV6_ILA=m
 CONFIG_IPV6_RPL_LWTUNNEL=y
+CONFIG_NET_TEAM=m
diff --git a/tools/testing/selftests/net/vdev_offload.sh b/tools/testing/selftests/net/vdev_offload.sh
new file mode 100755
index 000000000000..78fc212efd4a
--- /dev/null
+++ b/tools/testing/selftests/net/vdev_offload.sh
@@ -0,0 +1,176 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# shellcheck disable=SC1091
+source lib.sh
+
+# Set related offload on lower deivces and check if upper devices re-compute
+# Some features are fixed on veth interface. Just list here in case we have a
+# better way to test in future.
+set_offload()
+{
+	local dev="$1"
+	local state="$2"
+
+	# VLAN features
+	# NETIF_F_FRAGLIST: tx-scatter-gather-fraglist
+	# shellcheck disable=SC2154
+	ip netns exec "$ns" ethtool -K "$dev" tx-scatter-gather-fraglist "$state"
+
+	# ENC features
+	# NETIF_F_RXCSUM: rx-checksum (bond/team/bridge fixed)
+
+	# XFRM features (veth fixed, netdevsim supports)
+	# NETIF_F_HW_ESP: esp-hw-offload
+	# NETIF_F_GSO_ESP: tx-esp-segmentation
+
+	# GSO partial features
+	# NETIF_F_GSO_PARTIAL: tx-gso-partial (veth/bond fixed)
+
+	# Common features
+	# NETIF_F_SG: tx-scatter-gather
+	ip netns exec "$ns" ethtool -K "$dev" tx-scatter-gather "$state" &> /dev/null
+	# NETIF_F_GSO_SOFTWARE: NETIF_F_GSO_ACCECN: tx-tcp-accecn-segmentation
+	ip netns exec "$ns" ethtool -K "$dev" tx-tcp-accecn-segmentation "$state"
+	# NETIF_F_GSO_SOFTWARE: NETIF_F_GSO_SCTP: tx-sctp-segmentation
+	ip netns exec "$ns" ethtool -K "$dev" tx-sctp-segmentation "$state"
+	# NETIF_F_GSO_SOFTWARE: NETIF_F_GSO_FRAGLIST: tx-gso-list
+	ip netns exec "$ns" ethtool -K "$dev" tx-gso-list "$state"
+}
+
+__check_offload()
+{
+	local dev=$1
+	local opt=$2
+	local expect=$3
+
+	ip netns exec "$ns" ethtool --json -k "$dev" | \
+		jq -r -e ".[].\"$opt\".active == ${expect}" >/dev/null
+}
+
+check_offload()
+{
+	local dev=$1
+	local state=$2
+
+	__check_offload "$dev" "tx-scatter-gather-fraglist" "$state" || RET=1
+	__check_offload "$dev" "tx-scatter-gather" "$state" || RET=1
+	__check_offload "$dev" "tx-tcp-accecn-segmentation" "$state" || RET=1
+	__check_offload "$dev" "tx-sctp-segmentation" "$state" || RET=1
+	__check_offload "$dev" "tx-gso-list" "$state" || RET=1
+}
+
+setup_veth()
+{
+	# Set up test netns
+	setup_ns ns switch
+
+	# shellcheck disable=SC2154
+	ip -n "$ns" link add veth0 type veth peer name veth0 netns "$switch"
+	ip -n "$ns" link add veth1 type veth peer name veth1 netns "$switch"
+	ip -n "$switch" link set veth0 up
+	ip -n "$switch" link set veth1 up
+
+	link_0=veth0
+	link_1=veth1
+}
+
+setup_netdevsim()
+{
+	setup_ns ns
+	# The create_netdevsim() function will set the interface up. Later,
+	# when it is added to bonded, we need to set it down first. And when
+	# set down, it will have no carrier. So we need to add netdevsim ourselves.
+	modprobe netdevsim
+	udevadm settle
+	echo "0 2" | ip netns exec "$ns" tee /sys/bus/netdevsim/new_device >/dev/null
+	link_0=$(ip netns exec "$ns" ls /sys/bus/netdevsim/devices/netdevsim0/net | head -n 1)
+	link_1=$(ip netns exec "$ns" ls /sys/bus/netdevsim/devices/netdevsim0/net | tail -n 1)
+}
+
+cleanup()
+{
+	cleanup_netdevsim 0
+	cleanup_all_ns
+}
+
+setup_bond()
+{
+	ip -n "$ns" link set "$link_0" nomaster
+	ip -n "$ns" link set "$link_1" nomaster
+	ip -n "$ns" link add bond0 type bond mode active-backup miimon 100
+	ip -n "$ns" link set "$link_0" master bond0
+	ip -n "$ns" link set "$link_1" master bond0
+	ip -n "$ns" link set bond0 up
+}
+
+setup_team()
+{
+	ip -n "$ns" link set "$link_0" nomaster
+	ip -n "$ns" link set "$link_1" nomaster
+	ip -n "$ns" link add team0 type team
+	ip -n "$ns" link set "$link_0" master team0
+	ip -n "$ns" link set "$link_1" master team0
+	ip -n "$ns" link set team0 up
+}
+
+setup_bridge()
+{
+	ip -n "$ns" link set "$link_0" nomaster
+	ip -n "$ns" link set "$link_1" nomaster
+	ip -n "$ns" link add br0 type bridge
+	ip -n "$ns" link set "$link_0" master br0
+	ip -n "$ns" link set "$link_1" master br0
+	ip -n "$ns" link set br0 up
+}
+
+check_xfrm()
+{
+	local dev=$1
+	local src=192.0.2.1
+	local dst=192.0.2.2
+	local key="0x3132333435363738393031323334353664636261"
+
+	RET=0
+
+	ip -n "$ns" xfrm state flush
+	ip -n "$ns" xfrm state add proto esp src "$src" dst "$dst" spi 9 \
+		mode transport reqid 42 aead "rfc4106(gcm(aes))" "$key" 128 \
+		sel src "$src"/24 dst "$dst"/24 offload dev "$dev" dir out
+
+	# shellcheck disable=SC2034
+	ip -n "$ns" xfrm state list | grep -q "crypto offload parameters: dev $dev dir" || RET=1
+	log_test "$dev" "xfrm offload"
+}
+
+do_test()
+{
+	local dev=$1
+
+	RET=0
+	set_offload veth0 "on"
+	set_offload veth1 "on"
+	check_offload "$dev" "true"
+	log_test "$dev" "enable offload"
+
+	RET=0
+	set_offload veth0 "off"
+	set_offload veth1 "off"
+	check_offload "$dev" "false"
+	log_test "$dev" "disable offload"
+}
+
+trap cleanup EXIT
+setup_veth
+setup_bond
+do_test bond0
+setup_team
+do_test team0
+setup_bridge
+do_test br0
+
+# Check NETIF_F_HW_ESP
+# Only test bond as team and bridge haven't implemented xfrm offload
+setup_netdevsim
+setup_bond
+check_xfrm bond0
-- 
2.50.1