1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 # This assumes running on a host with two virtio interfaces connected
5 # back to back. Example script to do such wire-up of tap devices would
6 # look like this:
7 #
8 # =======================================================================================================
9 # #!/bin/bash
10 #
11 # DEV1="$1"
12 # DEV2="$2"
13 #
14 # sudo tc qdisc add dev $DEV1 clsact
15 # sudo tc qdisc add dev $DEV2 clsact
16 # sudo tc filter add dev $DEV1 ingress protocol all pref 1 matchall action mirred egress redirect dev $DEV2
17 # sudo tc filter add dev $DEV2 ingress protocol all pref 1 matchall action mirred egress redirect dev $DEV1
18 # sudo ip link set $DEV1 up
19 # sudo ip link set $DEV2 up
20 # =======================================================================================================
21
22 REQUIRE_MZ="no"
23 NETIF_CREATE="no"
24 NETIF_FIND_DRIVER="virtio_net"
25 NUM_NETIFS=2
26
27 H1_IPV4="192.0.2.1"
28 H2_IPV4="192.0.2.2"
29 H1_IPV6="2001:db8:1::1"
30 H2_IPV6="2001:db8:1::2"
31
32 VIRTIO_NET_F_MAC=5
33
34 virtio_device_get()
35 {
36 local dev=$1; shift
37 local device_path="/sys/class/net/$dev/device/"
38
39 basename `realpath $device_path`
40 }
41
42 virtio_device_rebind()
43 {
44 local dev=$1; shift
45 local device=`virtio_device_get $dev`
46
47 echo "$device" > /sys/bus/virtio/drivers/virtio_net/unbind
48 echo "$device" > /sys/bus/virtio/drivers/virtio_net/bind
49 }
50
51 virtio_debugfs_get()
52 {
53 local dev=$1; shift
54 local device=`virtio_device_get $dev`
55
56 echo /sys/kernel/debug/virtio/$device/
57 }
58
59 check_virtio_debugfs()
60 {
61 local dev=$1; shift
62 local debugfs=`virtio_debugfs_get $dev`
63
64 if [ ! -f "$debugfs/device_features" ] ||
65 [ ! -f "$debugfs/filter_feature_add" ] ||
66 [ ! -f "$debugfs/filter_feature_del" ] ||
67 [ ! -f "$debugfs/filter_features" ] ||
68 [ ! -f "$debugfs/filter_features_clear" ]; then
69 echo "SKIP: not possible to access debugfs for $dev"
70 exit $ksft_skip
71 fi
72 }
73
74 virtio_feature_present()
75 {
76 local dev=$1; shift
77 local feature=$1; shift
78 local debugfs=`virtio_debugfs_get $dev`
79
80 cat $debugfs/device_features |grep "^$feature$" &> /dev/null
81 return $?
82 }
83
84 virtio_filter_features_clear()
85 {
86 local dev=$1; shift
87 local debugfs=`virtio_debugfs_get $dev`
88
89 echo "1" > $debugfs/filter_features_clear
90 }
91
92 virtio_filter_feature_add()
93 {
94 local dev=$1; shift
95 local feature=$1; shift
96 local debugfs=`virtio_debugfs_get $dev`
97
98 echo "$feature" > $debugfs/filter_feature_add
99 }
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