tools/testing/selftests/net/forwarding/loopback.sh

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