mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Daniel T. Lee](/assets/img/avatar_default.png)
This commit changes the _kern suffix to .bpf with the BPF test programs. With this modification, test programs will inherit the benefit of the new CLANG-BPF compile target. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-11-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
187 lines
4.3 KiB
Bash
Executable file
187 lines
4.3 KiB
Bash
Executable file
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
MY_DIR=$(dirname $0)
|
|
# Details on the bpf prog
|
|
BPF_CGRP2_ARRAY_NAME='test_cgrp2_array_pin'
|
|
BPF_PROG="$MY_DIR/test_cgrp2_tc.bpf.o"
|
|
BPF_SECTION='filter'
|
|
|
|
[ -z "$TC" ] && TC='tc'
|
|
[ -z "$IP" ] && IP='ip'
|
|
|
|
# Names of the veth interface, net namespace...etc.
|
|
HOST_IFC='ve'
|
|
NS_IFC='vens'
|
|
NS='ns'
|
|
|
|
find_mnt() {
|
|
cat /proc/mounts | \
|
|
awk '{ if ($3 == "'$1'" && mnt == "") { mnt = $2 }} END { print mnt }'
|
|
}
|
|
|
|
# Init cgroup2 vars
|
|
init_cgrp2_vars() {
|
|
CGRP2_ROOT=$(find_mnt cgroup2)
|
|
if [ -z "$CGRP2_ROOT" ]
|
|
then
|
|
CGRP2_ROOT='/mnt/cgroup2'
|
|
MOUNT_CGRP2="yes"
|
|
fi
|
|
CGRP2_TC="$CGRP2_ROOT/tc"
|
|
CGRP2_TC_LEAF="$CGRP2_TC/leaf"
|
|
}
|
|
|
|
# Init bpf fs vars
|
|
init_bpf_fs_vars() {
|
|
local bpf_fs_root=$(find_mnt bpf)
|
|
[ -n "$bpf_fs_root" ] || return -1
|
|
BPF_FS_TC_SHARE="$bpf_fs_root/tc/globals"
|
|
}
|
|
|
|
setup_cgrp2() {
|
|
case $1 in
|
|
start)
|
|
if [ "$MOUNT_CGRP2" == 'yes' ]
|
|
then
|
|
[ -d $CGRP2_ROOT ] || mkdir -p $CGRP2_ROOT
|
|
mount -t cgroup2 none $CGRP2_ROOT || return $?
|
|
fi
|
|
mkdir -p $CGRP2_TC_LEAF
|
|
;;
|
|
*)
|
|
rmdir $CGRP2_TC_LEAF && rmdir $CGRP2_TC
|
|
[ "$MOUNT_CGRP2" == 'yes' ] && umount $CGRP2_ROOT
|
|
;;
|
|
esac
|
|
}
|
|
|
|
setup_bpf_cgrp2_array() {
|
|
local bpf_cgrp2_array="$BPF_FS_TC_SHARE/$BPF_CGRP2_ARRAY_NAME"
|
|
case $1 in
|
|
start)
|
|
$MY_DIR/test_cgrp2_array_pin -U $bpf_cgrp2_array -v $CGRP2_TC
|
|
;;
|
|
*)
|
|
[ -d "$BPF_FS_TC_SHARE" ] && rm -f $bpf_cgrp2_array
|
|
;;
|
|
esac
|
|
}
|
|
|
|
setup_net() {
|
|
case $1 in
|
|
start)
|
|
$IP link add $HOST_IFC type veth peer name $NS_IFC || return $?
|
|
$IP link set dev $HOST_IFC up || return $?
|
|
sysctl -q net.ipv6.conf.$HOST_IFC.disable_ipv6=0
|
|
sysctl -q net.ipv6.conf.$HOST_IFC.accept_dad=0
|
|
|
|
$IP netns add $NS || return $?
|
|
$IP link set dev $NS_IFC netns $NS || return $?
|
|
$IP -n $NS link set dev $NS_IFC up || return $?
|
|
$IP netns exec $NS sysctl -q net.ipv6.conf.$NS_IFC.disable_ipv6=0
|
|
$IP netns exec $NS sysctl -q net.ipv6.conf.$NS_IFC.accept_dad=0
|
|
$TC qdisc add dev $HOST_IFC clsact || return $?
|
|
$TC filter add dev $HOST_IFC egress bpf da obj $BPF_PROG sec $BPF_SECTION || return $?
|
|
;;
|
|
*)
|
|
$IP netns del $NS
|
|
$IP link del $HOST_IFC
|
|
;;
|
|
esac
|
|
}
|
|
|
|
run_in_cgrp() {
|
|
# Fork another bash and move it under the specified cgroup.
|
|
# It makes the cgroup cleanup easier at the end of the test.
|
|
cmd='echo $$ > '
|
|
cmd="$cmd $1/cgroup.procs; exec $2"
|
|
bash -c "$cmd"
|
|
}
|
|
|
|
do_test() {
|
|
run_in_cgrp $CGRP2_TC_LEAF "ping -6 -c3 ff02::1%$HOST_IFC >& /dev/null"
|
|
local dropped=$($TC -s qdisc show dev $HOST_IFC | tail -3 | \
|
|
awk '/drop/{print substr($7, 0, index($7, ",")-1)}')
|
|
if [[ $dropped -eq 0 ]]
|
|
then
|
|
echo "FAIL"
|
|
return 1
|
|
else
|
|
echo "Successfully filtered $dropped packets"
|
|
return 0
|
|
fi
|
|
}
|
|
|
|
do_exit() {
|
|
if [ "$DEBUG" == "yes" ] && [ "$MODE" != 'cleanuponly' ]
|
|
then
|
|
echo "------ DEBUG ------"
|
|
echo "mount: "; mount | grep -E '(cgroup2|bpf)'; echo
|
|
echo "$CGRP2_TC_LEAF: "; ls -l $CGRP2_TC_LEAF; echo
|
|
if [ -d "$BPF_FS_TC_SHARE" ]
|
|
then
|
|
echo "$BPF_FS_TC_SHARE: "; ls -l $BPF_FS_TC_SHARE; echo
|
|
fi
|
|
echo "Host net:"
|
|
$IP netns
|
|
$IP link show dev $HOST_IFC
|
|
$IP -6 a show dev $HOST_IFC
|
|
$TC -s qdisc show dev $HOST_IFC
|
|
echo
|
|
echo "$NS net:"
|
|
$IP -n $NS link show dev $NS_IFC
|
|
$IP -n $NS -6 link show dev $NS_IFC
|
|
echo "------ DEBUG ------"
|
|
echo
|
|
fi
|
|
|
|
if [ "$MODE" != 'nocleanup' ]
|
|
then
|
|
setup_net stop
|
|
setup_bpf_cgrp2_array stop
|
|
setup_cgrp2 stop
|
|
fi
|
|
}
|
|
|
|
init_cgrp2_vars
|
|
init_bpf_fs_vars
|
|
|
|
while [[ $# -ge 1 ]]
|
|
do
|
|
a="$1"
|
|
case $a in
|
|
debug)
|
|
DEBUG='yes'
|
|
shift 1
|
|
;;
|
|
cleanup-only)
|
|
MODE='cleanuponly'
|
|
shift 1
|
|
;;
|
|
no-cleanup)
|
|
MODE='nocleanup'
|
|
shift 1
|
|
;;
|
|
*)
|
|
echo "test_cgrp2_tc [debug] [cleanup-only | no-cleanup]"
|
|
echo " debug: Print cgrp and network setup details at the end of the test"
|
|
echo " cleanup-only: Try to cleanup things from last test. No test will be run"
|
|
echo " no-cleanup: Run the test but don't do cleanup at the end"
|
|
echo "[Note: If no arg is given, it will run the test and do cleanup at the end]"
|
|
echo
|
|
exit -1
|
|
;;
|
|
esac
|
|
done
|
|
|
|
trap do_exit 0
|
|
|
|
[ "$MODE" == 'cleanuponly' ] && exit
|
|
|
|
setup_cgrp2 start || exit $?
|
|
setup_net start || exit $?
|
|
init_bpf_fs_vars || exit $?
|
|
setup_bpf_cgrp2_array start || exit $?
|
|
do_test
|
|
echo
|