Stanislav Fomichev 95fbda1e37 selftests: bpf: Add selftest for __sk_buff tstamp
Make sure BPF_PROG_TEST_RUN accepts tstamp and exports any
modifications that BPF program does.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20191015183125.124413-2-sdf@google.com
2019-10-15 16:24:26 -07:00

23 lines
383 B
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include "bpf_helpers.h"
int _version SEC("version") = 1;
char _license[] SEC("license") = "GPL";
SEC("skb_ctx")
int process(struct __sk_buff *skb)
{
#pragma clang loop unroll(full)
for (int i = 0; i < 5; i++) {
if (skb->cb[i] != i + 1)
return 1;
skb->cb[i]++;
}
skb->priority++;
skb->tstamp++;
return 0;
}