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// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
__noinline
long changes_pkt_data(struct __sk_buff *sk)
{
return bpf_skb_pull_data(sk, 0);
}
__noinline __weak
long does_not_change_pkt_data(struct __sk_buff *sk)
{
return 0;
}
SEC("?tc")
int main_with_subprogs(struct __sk_buff *sk)
{
changes_pkt_data(sk);
does_not_change_pkt_data(sk);
return 0;
}
SEC("?tc")
int main_changes(struct __sk_buff *sk)
{
bpf_skb_pull_data(sk, 0);
return 0;
}
SEC("?tc")
int main_does_not_change(struct __sk_buff *sk)
{
return 0;
}
char _license[] SEC("license") = "GPL";
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