linux/tools/testing/selftests/bpf/test_bpftool_metadata.sh

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0

# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4

BPF_FILE_USED="metadata_used.bpf.o"
BPF_FILE_UNUSED="metadata_unused.bpf.o"

TESTNAME=bpftool_metadata
BPF_FS=$(awk '$3 == "bpf" {print $2; exit}' /proc/mounts)
BPF_DIR=$BPF_FS/test_$TESTNAME

_cleanup()
{
	set +e
	rm -rf $BPF_DIR 2> /dev/null
}

cleanup_skip()
{
	echo "selftests: $TESTNAME [SKIP]"
	_cleanup

	exit $ksft_skip
}

cleanup()
{
	if [ "$?" = 0 ]; then
		echo "selftests: $TESTNAME [PASS]"
	else
		echo "selftests: $TESTNAME [FAILED]"
	fi
	_cleanup
}

if [ $(id -u) -ne 0 ]; then
	echo "selftests: $TESTNAME [SKIP] Need root privileges"
	exit $ksft_skip
fi

if [ -z "$BPF_FS" ]; then
	echo "selftests: $TESTNAME [SKIP] Could not run test without bpffs mounted"
	exit $ksft_skip
fi

if ! bpftool version > /dev/null 2>&1; then
	echo "selftests: $TESTNAME [SKIP] Could not run test without bpftool"
	exit $ksft_skip
fi

set -e

trap cleanup_skip EXIT

mkdir $BPF_DIR

trap cleanup EXIT

bpftool prog load $BPF_FILE_UNUSED $BPF_DIR/unused

METADATA_PLAIN="$(bpftool prog)"
echo "$METADATA_PLAIN" | grep 'a = "foo"' > /dev/null
echo "$METADATA_PLAIN" | grep 'b = 1' > /dev/null

bpftool prog --json | grep '"metadata":{"a":"foo","b":1}' > /dev/null

bpftool map | grep 'metadata.rodata' > /dev/null

rm $BPF_DIR/unused

bpftool prog load $BPF_FILE_USED $BPF_DIR/used

METADATA_PLAIN="$(bpftool prog)"
echo "$METADATA_PLAIN" | grep 'a = "bar"' > /dev/null
echo "$METADATA_PLAIN" | grep 'b = 2' > /dev/null

bpftool prog --json | grep '"metadata":{"a":"bar","b":2}' > /dev/null

bpftool map | grep 'metadata.rodata' > /dev/null

rm $BPF_DIR/used

exit 0