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Message-ID: <20240422153303.3860947-5-jiri@resnulli.us>
Date: Mon, 22 Apr 2024 17:33:00 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
pabeni@...hat.com,
davem@...emloft.net,
edumazet@...gle.com,
parav@...dia.com,
mst@...hat.com,
jasowang@...hat.com,
xuanzhuo@...ux.alibaba.com,
shuah@...nel.org,
petrm@...dia.com,
liuhangbin@...il.com,
vladimir.oltean@....com,
bpoirier@...dia.com,
idosch@...dia.com,
virtualization@...ts.linux.dev
Subject: [patch net-next v5 5/5] selftests: virtio_net: add initial tests
From: Jiri Pirko <jiri@...dia.com>
Introduce initial tests for virtio_net driver. Focus on feature testing
leveraging previously introduced debugfs feature filtering
infrastructure. Add very basic ping and F_MAC feature tests.
To run this, do:
$ make -C tools/testing/selftests/ TARGETS=drivers/net/virtio_net/ run_tests
Run it on a system with 2 virtio_net devices connected back-to-back
on the hypervisor.
Signed-off-by: Jiri Pirko <jiri@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
v3->v4:
- s/cleanup/setup_cleanup/
- moved pre_cleanup call to cleanup() to be called only once on exit
v1->v2:
- added TEST_FILES and TEST_INCLUDES in the Makefile
- fixed directory name in selftests/Makefile
- added MAINTAINERS entry
- added config file with kernel config options
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
.../selftests/drivers/net/virtio_net/Makefile | 15 ++
.../drivers/net/virtio_net/basic_features.sh | 131 ++++++++++++++++++
.../selftests/drivers/net/virtio_net/config | 2 +
.../net/virtio_net/virtio_net_common.sh | 99 +++++++++++++
6 files changed, 249 insertions(+)
create mode 100644 tools/testing/selftests/drivers/net/virtio_net/Makefile
create mode 100755 tools/testing/selftests/drivers/net/virtio_net/basic_features.sh
create mode 100644 tools/testing/selftests/drivers/net/virtio_net/config
create mode 100644 tools/testing/selftests/drivers/net/virtio_net/virtio_net_common.sh
diff --git a/MAINTAINERS b/MAINTAINERS
index c0bfad334623..f7ae6de3e334 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -23448,6 +23448,7 @@ F: include/linux/virtio*.h
F: include/linux/vringh.h
F: include/uapi/linux/virtio_*.h
F: tools/virtio/
+F: tools/testing/selftests/drivers/net/virtio_net/
VIRTIO CRYPTO DRIVER
M: Gonglei <arei.gonglei@...wei.com>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index c785b6256a45..2c940e9c4ced 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -20,6 +20,7 @@ TARGETS += drivers/s390x/uvdevice
TARGETS += drivers/net
TARGETS += drivers/net/bonding
TARGETS += drivers/net/team
+TARGETS += drivers/net/virtio_net
TARGETS += dt
TARGETS += efivarfs
TARGETS += exec
diff --git a/tools/testing/selftests/drivers/net/virtio_net/Makefile b/tools/testing/selftests/drivers/net/virtio_net/Makefile
new file mode 100644
index 000000000000..7ec7cd3ab2cc
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/virtio_net/Makefile
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0+ OR MIT
+
+TEST_PROGS = basic_features.sh \
+ #
+
+TEST_FILES = \
+ virtio_net_common.sh \
+ #
+
+TEST_INCLUDES = \
+ ../../../net/forwarding/lib.sh \
+ ../../../net/lib.sh \
+ #
+
+include ../../../lib.mk
diff --git a/tools/testing/selftests/drivers/net/virtio_net/basic_features.sh b/tools/testing/selftests/drivers/net/virtio_net/basic_features.sh
new file mode 100755
index 000000000000..cf8cf816ed48
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/virtio_net/basic_features.sh
@@ -0,0 +1,131 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# See virtio_net_common.sh comments for more details about assumed setup
+
+ALL_TESTS="
+ initial_ping_test
+ f_mac_test
+"
+
+source virtio_net_common.sh
+
+lib_dir=$(dirname "$0")
+source "$lib_dir"/../../../net/forwarding/lib.sh
+
+h1=${NETIFS[p1]}
+h2=${NETIFS[p2]}
+
+h1_create()
+{
+ simple_if_init $h1 $H1_IPV4/24 $H1_IPV6/64
+}
+
+h1_destroy()
+{
+ simple_if_fini $h1 $H1_IPV4/24 $H1_IPV6/64
+}
+
+h2_create()
+{
+ simple_if_init $h2 $H2_IPV4/24 $H2_IPV6/64
+}
+
+h2_destroy()
+{
+ simple_if_fini $h2 $H2_IPV4/24 $H2_IPV6/64
+}
+
+initial_ping_test()
+{
+ setup_cleanup
+ setup_prepare
+ ping_test $h1 $H2_IPV4 " simple"
+}
+
+f_mac_test()
+{
+ RET=0
+ local test_name="mac feature filtered"
+
+ virtio_feature_present $h1 $VIRTIO_NET_F_MAC
+ if [ $? -ne 0 ]; then
+ log_test_skip "$test_name" "Device $h1 is missing feature $VIRTIO_NET_F_MAC."
+ return 0
+ fi
+ virtio_feature_present $h1 $VIRTIO_NET_F_MAC
+ if [ $? -ne 0 ]; then
+ log_test_skip "$test_name" "Device $h2 is missing feature $VIRTIO_NET_F_MAC."
+ return 0
+ fi
+
+ setup_cleanup
+ setup_prepare
+
+ grep -q 0 /sys/class/net/$h1/addr_assign_type
+ check_err $? "Permanent address assign type for $h1 is not set"
+ grep -q 0 /sys/class/net/$h2/addr_assign_type
+ check_err $? "Permanent address assign type for $h2 is not set"
+
+ setup_cleanup
+ virtio_filter_feature_add $h1 $VIRTIO_NET_F_MAC
+ virtio_filter_feature_add $h2 $VIRTIO_NET_F_MAC
+ setup_prepare
+
+ grep -q 0 /sys/class/net/$h1/addr_assign_type
+ check_fail $? "Permanent address assign type for $h1 is set when F_MAC feature is filtered"
+ grep -q 0 /sys/class/net/$h2/addr_assign_type
+ check_fail $? "Permanent address assign type for $h2 is set when F_MAC feature is filtered"
+
+ ping_do $h1 $H2_IPV4
+ check_err $? "Ping failed"
+
+ log_test "$test_name"
+}
+
+setup_prepare()
+{
+ virtio_device_rebind $h1
+ virtio_device_rebind $h2
+ wait_for_dev $h1
+ wait_for_dev $h2
+
+ vrf_prepare
+
+ h1_create
+ h2_create
+}
+
+setup_cleanup()
+{
+ h2_destroy
+ h1_destroy
+
+ vrf_cleanup
+
+ virtio_filter_features_clear $h1
+ virtio_filter_features_clear $h2
+ virtio_device_rebind $h1
+ virtio_device_rebind $h2
+ wait_for_dev $h1
+ wait_for_dev $h2
+}
+
+cleanup()
+{
+ pre_cleanup
+ setup_cleanup
+}
+
+check_driver $h1 "virtio_net"
+check_driver $h2 "virtio_net"
+check_virtio_debugfs $h1
+check_virtio_debugfs $h2
+
+trap cleanup EXIT
+
+setup_prepare
+
+tests_run
+
+exit "$EXIT_STATUS"
diff --git a/tools/testing/selftests/drivers/net/virtio_net/config b/tools/testing/selftests/drivers/net/virtio_net/config
new file mode 100644
index 000000000000..f35de0542b60
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/virtio_net/config
@@ -0,0 +1,2 @@
+CONFIG_VIRTIO_NET=y
+CONFIG_VIRTIO_DEBUG=y
diff --git a/tools/testing/selftests/drivers/net/virtio_net/virtio_net_common.sh b/tools/testing/selftests/drivers/net/virtio_net/virtio_net_common.sh
new file mode 100644
index 000000000000..57bd8055e2e5
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/virtio_net/virtio_net_common.sh
@@ -0,0 +1,99 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This assumes running on a host with two virtio interfaces connected
+# back to back. Example script to do such wire-up of tap devices would
+# look like this:
+#
+# =======================================================================================================
+# #!/bin/bash
+#
+# DEV1="$1"
+# DEV2="$2"
+#
+# sudo tc qdisc add dev $DEV1 clsact
+# sudo tc qdisc add dev $DEV2 clsact
+# sudo tc filter add dev $DEV1 ingress protocol all pref 1 matchall action mirred egress redirect dev $DEV2
+# sudo tc filter add dev $DEV2 ingress protocol all pref 1 matchall action mirred egress redirect dev $DEV1
+# sudo ip link set $DEV1 up
+# sudo ip link set $DEV2 up
+# =======================================================================================================
+
+REQUIRE_MZ="no"
+NETIF_CREATE="no"
+NETIF_FIND_DRIVER="virtio_net"
+NUM_NETIFS=2
+
+H1_IPV4="192.0.2.1"
+H2_IPV4="192.0.2.2"
+H1_IPV6="2001:db8:1::1"
+H2_IPV6="2001:db8:1::2"
+
+VIRTIO_NET_F_MAC=5
+
+virtio_device_get()
+{
+ local dev=$1; shift
+ local device_path="/sys/class/net/$dev/device/"
+
+ basename `realpath $device_path`
+}
+
+virtio_device_rebind()
+{
+ local dev=$1; shift
+ local device=`virtio_device_get $dev`
+
+ echo "$device" > /sys/bus/virtio/drivers/virtio_net/unbind
+ echo "$device" > /sys/bus/virtio/drivers/virtio_net/bind
+}
+
+virtio_debugfs_get()
+{
+ local dev=$1; shift
+ local device=`virtio_device_get $dev`
+
+ echo /sys/kernel/debug/virtio/$device/
+}
+
+check_virtio_debugfs()
+{
+ local dev=$1; shift
+ local debugfs=`virtio_debugfs_get $dev`
+
+ if [ ! -f "$debugfs/device_features" ] ||
+ [ ! -f "$debugfs/filter_feature_add" ] ||
+ [ ! -f "$debugfs/filter_feature_del" ] ||
+ [ ! -f "$debugfs/filter_features" ] ||
+ [ ! -f "$debugfs/filter_features_clear" ]; then
+ echo "SKIP: not possible to access debugfs for $dev"
+ exit $ksft_skip
+ fi
+}
+
+virtio_feature_present()
+{
+ local dev=$1; shift
+ local feature=$1; shift
+ local debugfs=`virtio_debugfs_get $dev`
+
+ cat $debugfs/device_features |grep "^$feature$" &> /dev/null
+ return $?
+}
+
+virtio_filter_features_clear()
+{
+ local dev=$1; shift
+ local debugfs=`virtio_debugfs_get $dev`
+
+ echo "1" > $debugfs/filter_features_clear
+}
+
+virtio_filter_feature_add()
+{
+ local dev=$1; shift
+ local feature=$1; shift
+ local debugfs=`virtio_debugfs_get $dev`
+
+ echo "$feature" > $debugfs/filter_feature_add
+}
--
2.44.0
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