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473c534735
commit 04789af756 upstream.
Extend changes_pkt_data tests with test cases freplacing the main
program that does not have subprograms. Try four combinations when
both main program and replacement do and do not change packet data.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20241212070711.427443-2-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
40 lines
603 B
C
40 lines
603 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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__noinline
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long changes_pkt_data(struct __sk_buff *sk)
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{
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return bpf_skb_pull_data(sk, 0);
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}
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__noinline __weak
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long does_not_change_pkt_data(struct __sk_buff *sk)
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{
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return 0;
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}
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SEC("?tc")
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int main_with_subprogs(struct __sk_buff *sk)
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{
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changes_pkt_data(sk);
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does_not_change_pkt_data(sk);
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return 0;
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}
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SEC("?tc")
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int main_changes(struct __sk_buff *sk)
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{
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bpf_skb_pull_data(sk, 0);
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return 0;
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}
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SEC("?tc")
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int main_does_not_change(struct __sk_buff *sk)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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