netdev - Re: running an eBPF program

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Message-ID: <CAErYV9F06Jk6oCet+x924YYs-XATfLYu_Yzg0j8+hxyunV-R5g@mail.gmail.com>
Date:   Thu, 1 Jun 2017 09:54:52 +0300
From:   Adel Fuchs <adelfuchs@...il.com>
To:     Y Song <ys114321@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: running an eBPF program

OK. Found it. Thanks! it works!

On Thu, Jun 1, 2017 at 9:43 AM, Adel Fuchs <adelfuchs@...il.com> wrote:
> Hi,
> Thanks for your reply. Where do I need to add this workaround?
>
> Thanks,
> Adel
>
> On Mon, May 29, 2017 at 8:31 AM, Y Song <ys114321@...il.com> wrote:
>> On Sun, May 28, 2017 at 12:38 AM, Adel Fuchs <adelfuchs@...il.com> wrote:
>>> Hi,
>>> Is there any way to run this eBPF program without that patch?
>>> Alternatively, is there any other eBPF sample that does run properly? I need
>>> to run a program that filters packets according to IP address or port.
>>
>> The following is temporary workaround you can use:
>>         int poff, nh_off = BPF_LL_OFF + ETH_HLEN;
>> -       __be16 proto = skb->protocol;
>> +       __be16 proto = (__be16)*(volatile __u32 *)&skb->protocol;
>>         __u8 ip_proto;