linux-stable/tools/testing/selftests/bpf/progs/metadata_unused.c
YiFei Zhu d42d1cc44d selftests/bpf: Test load and dump metadata with btftool and skel
This is a simple test to check that loading and dumping metadata
in btftool works, whether or not metadata contents are used by the
program.

A C test is also added to make sure the skeleton code can read the
metadata values.

Signed-off-by: YiFei Zhu <zhuyifei@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Cc: YiFei Zhu <zhuyifei1999@gmail.com>
Link: https://lore.kernel.org/bpf/20200915234543.3220146-6-sdf@google.com
2020-09-15 18:28:27 -07:00

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321 B
C

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
volatile const char bpf_metadata_a[] SEC(".rodata") = "foo";
volatile const int bpf_metadata_b SEC(".rodata") = 1;
SEC("cgroup_skb/egress")
int prog(struct xdp_md *ctx)
{
return 0;
}
char _license[] SEC("license") = "GPL";