1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 # Kselftest framework requirement - SKIP code is 4.
5 ksft_skip=4
6
7 ALL_TESTS="loopback_test"
8 NUM_NETIFS=2
9 lib_dir=$(dirname "$0")
10 source "$lib_dir"/../../../net/forwarding/tc_common.sh
11 source "$lib_dir"/../../../net/forwarding/lib.sh
12
13 h1_create()
14 {
15 simple_if_init $h1 192.0.2.1/24
16 tc qdisc add dev $h1 clsact
17 }
18
19 h1_destroy()
20 {
21 tc qdisc del dev $h1 clsact
22 simple_if_fini $h1 192.0.2.1/24
23 }
24
25 h2_create()
26 {
27 simple_if_init $h2
28 }
29
30 h2_destroy()
31 {
32 simple_if_fini $h2
33 }
34
35 loopback_test()
36 {
37 RET=0
38
39 tc filter add dev $h1 ingress protocol arp pref 1 handle 101 flower \
40 skip_hw arp_op reply arp_tip 192.0.2.1 action drop
41
42 $MZ $h1 -c 1 -t arp -q
43
44 tc_check_packets "dev $h1 ingress" 101 1
45 check_fail $? "Matched on a filter without loopback setup"
46
47 ethtool -K $h1 loopback on
48 check_err $? "Failed to enable loopback"
49
50 setup_wait_dev $h1
51
52 $MZ $h1 -c 1 -t arp -q
53
54 tc_check_packets "dev $h1 ingress" 101 1
55 check_err $? "Did not match on filter with loopback"
56
57 ethtool -K $h1 loopback off
58 check_err $? "Failed to disable loopback"
59
60 $MZ $h1 -c 1 -t arp -q
61
62 tc_check_packets "dev $h1 ingress" 101 2
63 check_fail $? "Matched on a filter after loopback was removed"
64
65 tc filter del dev $h1 ingress protocol arp pref 1 handle 101 flower
66
67 log_test "loopback"
68 }
69
70 setup_prepare()
71 {
72 h1=${NETIFS[p1]}
73 h2=${NETIFS[p2]}
74
75 vrf_prepare
76
77 h1_create
78 h2_create
79
80 if ethtool -k $h1 | grep loopback | grep -q fixed; then
81 log_test "SKIP: dev $h1 does not support loopback feature"
82 exit $ksft_skip
83 fi
84 }
85
86 cleanup()
87 {
88 pre_cleanup
89
90 h2_destroy
91 h1_destroy
92
93 vrf_cleanup
94 }
95
96 trap cleanup EXIT
97
98 setup_prepare
99 setup_wait
100
101 tests_run
102
103 exit $EXIT_STATUS
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