tools/testing/selftests/bpf/test_kmod.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Kselftest framework requirement - SKIP code is 4.
   5 ksft_skip=4
   6
   7 msg="skip all tests:"
   8 if [ "$(id -u)" != "0" ]; then
   9         echo $msg please run this as root >&2
  10         exit $ksft_skip
  11 fi
  12
  13 SRC_TREE=../../../../
  14
  15 test_run()
  16 {
  17         sysctl -w net.core.bpf_jit_enable=$1 2>&1 > /dev/null
  18         sysctl -w net.core.bpf_jit_harden=$2 2>&1 > /dev/null
  19
  20         echo "[ JIT enabled:$1 hardened:$2 ]"
  21         dmesg -C
  22         if [ -f ${SRC_TREE}/lib/test_bpf.ko ]; then
  23                 insmod ${SRC_TREE}/lib/test_bpf.ko 2> /dev/null
  24                 if [ $? -ne 0 ]; then
  25                         rc=1
  26                 fi
  27         else
  28                 # Use modprobe dry run to check for missing test_bpf module
  29                 if ! /sbin/modprobe -q -n test_bpf; then
  30                         echo "test_bpf: [SKIP]"
  31                 elif /sbin/modprobe -q test_bpf; then
  32                         echo "test_bpf: ok"
  33                 else
  34                         echo "test_bpf: [FAIL]"
  35                         rc=1
  36                 fi
  37         fi
  38         rmmod  test_bpf 2> /dev/null
  39         dmesg | grep FAIL
  40 }
  41
  42 test_save()
  43 {
  44         JE=`sysctl -n net.core.bpf_jit_enable`
  45         JH=`sysctl -n net.core.bpf_jit_harden`
  46 }
  47
  48 test_restore()
  49 {
  50         sysctl -w net.core.bpf_jit_enable=$JE 2>&1 > /dev/null
  51         sysctl -w net.core.bpf_jit_harden=$JH 2>&1 > /dev/null
  52 }
  53
  54 rc=0
  55 test_save
  56 test_run 0 0
  57 test_run 1 0
  58 test_run 1 1
  59 test_run 1 2
  60 test_restore
  61 exit $rc