On Mon, Sep 28, 2020 at 10:08:05AM +0100, Lorenz Bauer wrote:

[ ... ]

>  SEC("iter/sockmap")
> -int count_elems(struct bpf_iter__sockmap *ctx)
> +int copy(struct bpf_iter__sockmap *ctx)
>  {
>       struct sock *sk = ctx->sk;
>       __u32 tmp, *key = ctx->key;
>       int ret;
>  
> -     if (key)
> -             elems++;
> +     if (!key)
> +             return 0;
>  
> -     if (sk)
> +     elems++;
> +
> +     /* We need a temporary buffer on the stack, since the verifier doesn't
> +      * let us use the pointer from the context as an argument to the helper.
Is it something that can be improved later?

others LGTM.

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