Subject: Re: [net-next PATCH 07/10] bpf: add access to sock fields and pkt data from sk_skb programs

From: Daniel Borkmann <[email-masked]>
Date: Thu, 17 Aug 2017 14:40:28 +0200

On 08/17/2017 07:42 AM, Alexei Starovoitov wrote:
> On 8/15/17 10:33 PM, John Fastabend wrote:
>> +static int sk_skb_prologue(struct bpf_insn *insn_buf, bool direct_write,
>> +               const struct bpf_prog *prog)
>> +{
>> +    struct bpf_insn *insn = insn_buf;
>> +
>> +    if (!direct_write)
>> +        return 0;
>> +
>> +    /* if (!skb->cloned)
>> +     *       goto start;
>> +     *
>> +     * (Fast-path, otherwise approximation that we might be
>> +     *  a clone, do the rest in helper.)
>> +     */
>
> iirc we're doing something similar in other prologue generator?
> can be consolidated?

Jup, with tc. I'll fix this one so the two can be consolidated.

Cheers,
Daniel