[PATCHv3 net 3/3] selftests: bonding: add ipsec offload test

Hangbin Liu
2025-02-27T08:38:02Z

This introduces a test for IPSec offload over bonding, utilizing netdevsim
for the testing process, as veth interfaces do not support IPSec offload.
The test will ensure that the IPSec offload functionality remains operational
even after a failover event occurs in the bonding configuration.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
.../selftests/drivers/net/bonding/Makefile | 3 +-
.../drivers/net/bonding/bond_ipsec_offload.sh | 155 ++++++++++++++++++
.../selftests/drivers/net/bonding/config | 4 +
3 files changed, 161 insertions(+), 1 deletion(-)
create mode 100755 tools/testing/selftests/drivers/net/bonding/bond_ipsec_offload.sh

diff --git a/tools/testing/selftests/drivers/net/bonding/Makefile b/tools/testing/selftests/drivers/net/bonding/Makefile
index 2b10854e4b1e..d5a7de16d33a 100644
--- a/tools/testing/selftests/drivers/net/bonding/Makefile
+++ b/tools/testing/selftests/drivers/net/bonding/Makefile
@@ -10,7 +10,8 @@ TEST_PROGS := \
mode-2-recovery-updelay.sh \
bond_options.sh \
bond-eth-type-change.sh \
- bond_macvlan_ipvlan.sh
+ bond_macvlan_ipvlan.sh \
+ bond_ipsec_offload.sh

TEST_FILES := \
lag_lib.sh \
diff --git a/tools/testing/selftests/drivers/net/bonding/bond_ipsec_offload.sh b/tools/testing/selftests/drivers/net/bonding/bond_ipsec_offload.sh
new file mode 100755
index 000000000000..169866b47a67
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/bond_ipsec_offload.sh
@@ -0,0 +1,155 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# IPsec over bonding offload test:
+#
+# +----------------+
+# | bond0 |
+# | | |
+# | eth0 eth1 |
+# +---+-------+----+
+#
+# We use netdevsim instead of physical interfaces
+#-------------------------------------------------------------------
+# Example commands
+# ip x s add proto esp src 192.0.2.1 dst 192.0.2.2 \
+# spi 0x07 mode transport reqid 0x07 replay-window 32 \
+# aead 'rfc4106(gcm(aes))' 1234567890123456dcba 128 \
+# sel src 192.0.2.1/24 dst 192.0.2.2/24
+# offload dev bond0 dir out
+# ip x p add dir out src 192.0.2.1/24 dst 192.0.2.2/24 \
+# tmpl proto esp src 192.0.2.1 dst 192.0.2.2 \
+# spi 0x07 mode transport reqid 0x07
+#
+#-------------------------------------------------------------------
+
+lib_dir=$(dirname "$0")
+source "$lib_dir"/../../../net/lib.sh
+algo="aead rfc4106(gcm(aes)) 0x3132333435363738393031323334353664636261 128"
+srcip=192.0.2.1
+dstip=192.0.2.2
+ipsec0=/sys/kernel/debug/netdevsim/netdevsim0/ports/0/ipsec
+ipsec1=/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ipsec
+ret=0
+
+cleanup()
+{
+ modprobe -r netdevsim
+ cleanup_ns $ns
+}
+
+active_slave_changed()
+{
+ local old_active_slave=$1
+ local new_active_slave=$(ip -n ${ns} -d -j link show bond0 | \
+ jq -r ".[].linkinfo.info_data.active_slave")
+ [ "$new_active_slave" != "$old_active_slave" -a "$new_active_slave" != "null" ]
+}
+
+test_offload()
+{
+ # use ping to exercise the Tx path
+ ip netns exec $ns ping -I bond0 -c 3 -W 1 -i 0 $dstip >/dev/null
+
+ active_slave=$(ip -n ${ns} -d -j link show bond0 | \
+ jq -r ".[].linkinfo.info_data.active_slave")
+
+ if [ $active_slave = $nic0 ]; then
+ sysfs=$ipsec0
+ elif [ $active_slave = $nic1 ]; then
+ sysfs=$ipsec1
+ else
+ echo "FAIL: bond_ipsec_offload invalid active_slave $active_slave"
+ ret=1
+ fi
+
+ # The tx/rx order in sysfs may changed after failover
+ if grep -q "SA count=2 tx=3" $sysfs && grep -q "tx ipaddr=$dstip" $sysfs; then
+ echo "PASS: bond_ipsec_offload has correct tx count with link ${active_slave}"
+ else
+ echo "FAIL: bond_ipsec_offload incorrect tx count with link ${active_slave}"
+ ret=1
+ fi
+}
+
+if ! mount | grep -q debugfs; then
+ mount -t debugfs none /sys/kernel/debug/ &> /dev/null
+fi
+
+# setup netdevsim since dummy/veth dev doesn't have offload support
+if [ ! -w /sys/bus/netdevsim/new_device ] ; then
+ modprobe -q netdevsim
+ if [ $? -ne 0 ]; then
+ echo "SKIP: can't load netdevsim for ipsec offload"
+ exit $ksft_skip
+ fi
+fi
+
+trap cleanup EXIT
+
+setup_ns ns
+ip -n $ns link add bond0 type bond mode active-backup miimon 100
+ip -n $ns addr add $srcip/24 dev bond0
+ip -n $ns link set bond0 up
+
+ifaces=$(ip netns exec $ns bash -c '
+ sysfsnet=/sys/bus/netdevsim/devices/netdevsim0/net/
+ echo "0 2" > /sys/bus/netdevsim/new_device
+ while [ ! -d $sysfsnet ] ; do :; done
+ udevadm settle
+ ls $sysfsnet
+')
+nic0=$(echo $ifaces | cut -f1 -d ' ')
+nic1=$(echo $ifaces | cut -f2 -d ' ')
+ip -n $ns link set $nic0 master bond0
+ip -n $ns link set $nic1 master bond0
+
+# create offloaded SAs, both in and out
+ip -n $ns x p add dir out src $srcip/24 dst $dstip/24 \
+ tmpl proto esp src $srcip dst $dstip spi 9 \
+ mode transport reqid 42
+
+ip -n $ns x p add dir in src $dstip/24 dst $srcip/24 \
+ tmpl proto esp src $dstip dst $srcip spi 9 \
+ mode transport reqid 42
+
+ip -n $ns x s add proto esp src $srcip dst $dstip spi 9 \
+ mode transport reqid 42 $algo sel src $srcip/24 dst $dstip/24 \
+ offload dev bond0 dir out
+
+ip -n $ns x s add proto esp src $dstip dst $srcip spi 9 \
+ mode transport reqid 42 $algo sel src $dstip/24 dst $srcip/24 \
+ offload dev bond0 dir in
+
+# does offload show up in ip output
+lines=`ip -n $ns x s list | grep -c "crypto offload parameters: dev bond0 dir"`
+if [ $lines -ne 2 ] ; then
+ echo "FAIL: bond_ipsec_offload SA offload missing from list output"
+ ret=1
+fi
+
+# we didn't create a peer, make sure we can Tx by adding a permanent neighbour
+# this need to be added after enslave
+ip -n $ns neigh add $dstip dev bond0 lladdr 00:11:22:33:44:55
+
+# start Offload testing
+test_offload
+
+# do failover
+ip -n $ns link set $active_slave down
+slowwait 5 active_slave_changed $active_slave
+test_offload
+
+# make sure offload get removed from driver
+ip -n $ns x s flush
+ip -n $ns x p flush
+line0=$(grep -c "SA count=0" $ipsec0)
+line1=$(grep -c "SA count=0" $ipsec1)
+if [ $line0 -ne 1 -o $line1 -ne 1 ] ; then
+ echo "FAIL: bond_ipsec_offload SA not removed from driver"
+ ret=1
+else
+ echo "PASS: bond_ipsec_offload SA removed from driver"
+fi
+
+exit $ret
diff --git a/tools/testing/selftests/drivers/net/bonding/config b/tools/testing/selftests/drivers/net/bonding/config
index dad4e5fda4db..054fb772846f 100644
--- a/tools/testing/selftests/drivers/net/bonding/config
+++ b/tools/testing/selftests/drivers/net/bonding/config
@@ -9,3 +9,7 @@ CONFIG_NET_CLS_FLOWER=y
CONFIG_NET_SCH_INGRESS=y
CONFIG_NLMON=y
CONFIG_VETH=y
+CONFIG_INET_ESP=y
+CONFIG_INET_ESP_OFFLOAD=y
+CONFIG_XFRM_USER=m
+CONFIG_NETDEVSIM=m
--
2.46.0