selftests/bpf: Verify socket storage in cgroup/sock_{create, release}
Augment udp_limit test to set and verify socket storage value. That should be enough to exercise the changes from the previous patch. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200729003104.1280813-2-sdf@google.com
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@ -6,14 +6,28 @@
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int invocations = 0, in_use = 0;
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struct {
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__uint(type, BPF_MAP_TYPE_SK_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, int);
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__type(value, int);
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} sk_map SEC(".maps");
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SEC("cgroup/sock_create")
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int sock(struct bpf_sock *ctx)
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{
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int *sk_storage;
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__u32 key;
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if (ctx->type != SOCK_DGRAM)
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return 1;
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sk_storage = bpf_sk_storage_get(&sk_map, ctx, 0,
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BPF_SK_STORAGE_GET_F_CREATE);
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if (!sk_storage)
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return 0;
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*sk_storage = 0xdeadbeef;
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__sync_fetch_and_add(&invocations, 1);
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if (in_use > 0) {
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@ -31,11 +45,16 @@ int sock(struct bpf_sock *ctx)
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SEC("cgroup/sock_release")
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int sock_release(struct bpf_sock *ctx)
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{
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int *sk_storage;
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__u32 key;
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if (ctx->type != SOCK_DGRAM)
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return 1;
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sk_storage = bpf_sk_storage_get(&sk_map, ctx, 0, 0);
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if (!sk_storage || *sk_storage != 0xdeadbeef)
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return 0;
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__sync_fetch_and_add(&invocations, 1);
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__sync_fetch_and_add(&in_use, -1);
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return 1;
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