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Add selftests to exercise FD-based cgroup BPF program attachments and their intermixing with legacy cgroup BPF attachments. Auto-detachment and program replacement (both unconditional and cmpxchng-like) are tested as well. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200330030001.2312810-5-andriin@fb.com
25 lines
424 B
C
25 lines
424 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2020 Facebook
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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int calls = 0;
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int alt_calls = 0;
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SEC("cgroup_skb/egress1")
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int egress(struct __sk_buff *skb)
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{
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__sync_fetch_and_add(&calls, 1);
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return 1;
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}
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SEC("cgroup_skb/egress2")
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int egress_alt(struct __sk_buff *skb)
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{
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__sync_fetch_and_add(&alt_calls, 1);
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return 1;
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}
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char _license[] SEC("license") = "GPL";
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