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#!/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
}
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