samples/bpf/test_cgrp2_sock.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Test various socket options that can be set by attaching programs to cgroups.
   5
   6 CGRP_MNT="/tmp/cgroupv2-test_cgrp2_sock"
   7
   8 ################################################################################
   9 #
  10 print_result()
  11 {
  12         local rc=$1
  13         local status=" OK "
  14
  15         [ $rc -ne 0 ] && status="FAIL"
  16
  17         printf "%-50s    [%4s]\n" "$2" "$status"
  18 }
  19
  20 check_sock()
  21 {
  22         out=$(test_cgrp2_sock)
  23         echo $out | grep -q "$1"
  24         if [ $? -ne 0 ]; then
  25                 print_result 1 "IPv4: $2"
  26                 echo "    expected: $1"
  27                 echo "        have: $out"
  28                 rc=1
  29         else
  30                 print_result 0 "IPv4: $2"
  31         fi
  32 }
  33
  34 check_sock6()
  35 {
  36         out=$(test_cgrp2_sock -6)
  37         echo $out | grep -q "$1"
  38         if [ $? -ne 0 ]; then
  39                 print_result 1 "IPv6: $2"
  40                 echo "    expected: $1"
  41                 echo "        have: $out"
  42                 rc=1
  43         else
  44                 print_result 0 "IPv6: $2"
  45         fi
  46 }
  47
  48 ################################################################################
  49 #
  50
  51 cleanup()
  52 {
  53         echo $$ >> ${CGRP_MNT}/cgroup.procs
  54         rmdir ${CGRP_MNT}/sockopts
  55 }
  56
  57 cleanup_and_exit()
  58 {
  59         local rc=$1
  60         local msg="$2"
  61
  62         [ -n "$msg" ] && echo "ERROR: $msg"
  63
  64         test_cgrp2_sock -d ${CGRP_MNT}/sockopts
  65         ip li del cgrp2_sock
  66         umount ${CGRP_MNT}
  67
  68         exit $rc
  69 }
  70
  71
  72 ################################################################################
  73 # main
  74
  75 rc=0
  76
  77 ip li add cgrp2_sock type dummy 2>/dev/null
  78
  79 set -e
  80 mkdir -p ${CGRP_MNT}
  81 mount -t cgroup2 none ${CGRP_MNT}
  82 set +e
  83
  84
  85 # make sure we have a known start point
  86 cleanup 2>/dev/null
  87
  88 mkdir -p ${CGRP_MNT}/sockopts
  89 [ $? -ne 0 ] && cleanup_and_exit 1 "Failed to create cgroup hierarchy"
  90
  91
  92 # set pid into cgroup
  93 echo $$ > ${CGRP_MNT}/sockopts/cgroup.procs
  94
  95 # no bpf program attached, so socket should show no settings
  96 check_sock "dev , mark 0, priority 0" "No programs attached"
  97 check_sock6 "dev , mark 0, priority 0" "No programs attached"
  98
  99 # verify device is set
 100 #
 101 test_cgrp2_sock -b cgrp2_sock ${CGRP_MNT}/sockopts
 102 if [ $? -ne 0 ]; then
 103         cleanup_and_exit 1 "Failed to install program to set device"
 104 fi
 105 check_sock "dev cgrp2_sock, mark 0, priority 0" "Device set"
 106 check_sock6 "dev cgrp2_sock, mark 0, priority 0" "Device set"
 107
 108 # verify mark is set
 109 #
 110 test_cgrp2_sock -m 666 ${CGRP_MNT}/sockopts
 111 if [ $? -ne 0 ]; then
 112         cleanup_and_exit 1 "Failed to install program to set mark"
 113 fi
 114 check_sock "dev , mark 666, priority 0" "Mark set"
 115 check_sock6 "dev , mark 666, priority 0" "Mark set"
 116
 117 # verify priority is set
 118 #
 119 test_cgrp2_sock -p 123 ${CGRP_MNT}/sockopts
 120 if [ $? -ne 0 ]; then
 121         cleanup_and_exit 1 "Failed to install program to set priority"
 122 fi
 123 check_sock "dev , mark 0, priority 123" "Priority set"
 124 check_sock6 "dev , mark 0, priority 123" "Priority set"
 125
 126 # all 3 at once
 127 #
 128 test_cgrp2_sock -b cgrp2_sock -m 666 -p 123 ${CGRP_MNT}/sockopts
 129 if [ $? -ne 0 ]; then
 130         cleanup_and_exit 1 "Failed to install program to set device, mark and priority"
 131 fi
 132 check_sock "dev cgrp2_sock, mark 666, priority 123" "Priority set"
 133 check_sock6 "dev cgrp2_sock, mark 666, priority 123" "Priority set"
 134
 135 cleanup_and_exit $rc