netdev - Re: [PATCH bpf-next 0/8] Simplify xdp_do_redirect_map()/xdp_do_flush

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4e5cb0b0-14b9-5de9-4346-e4c2955e99a0@iogearbox.net>
Date:   Thu, 19 Dec 2019 21:08:36 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Björn Töpel <bjorn.topel@...il.com>,
        Netdev <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>, bpf <bpf@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        John Fastabend <john.fastabend@...il.com>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Maciej Fijalkowski <maciejromanfijalkowski@...il.com>
Subject: Re: [PATCH bpf-next 0/8] Simplify
 xdp_do_redirect_map()/xdp_do_flush_map() and XDP maps

On 12/19/19 8:33 PM, Jesper Dangaard Brouer wrote:
> On Wed, 18 Dec 2019 16:39:08 -0800
> Andrii Nakryiko <andrii.nakryiko@...il.com> wrote:
> 
>> On Wed, Dec 18, 2019 at 4:04 AM Jesper Dangaard Brouer
>> <brouer@...hat.com> wrote:
>>>
>>> On Wed, 18 Dec 2019 12:39:53 +0100
>>> Björn Töpel <bjorn.topel@...il.com> wrote:
>>>   
>>>> On Wed, 18 Dec 2019 at 12:11, Jesper Dangaard Brouer <brouer@...hat.com> wrote:
>>>>>
>>>>> On Wed, 18 Dec 2019 11:53:52 +0100
>>>>> Björn Töpel <bjorn.topel@...il.com> wrote:
>>>>>   
>>>>>>    $ sudo ./xdp_redirect_cpu --dev enp134s0f0 --cpu 22 xdp_cpu_map0
>>>>>>
>>>>>>    Running XDP/eBPF prog_name:xdp_cpu_map5_lb_hash_ip_pairs
>>>>>>    XDP-cpumap      CPU:to  pps            drop-pps    extra-info
>>>>>>    XDP-RX          20      7723038        0           0
>>>>>>    XDP-RX          total   7723038        0
>>>>>>    cpumap_kthread  total   0              0           0
>>>>>>    redirect_err    total   0              0
>>>>>>    xdp_exception   total   0              0
>>>>>
>>>>> Hmm... I'm missing some counters on the kthread side.
>>>>>   
>>>>
>>>> Oh? Any ideas why? I just ran the upstream sample straight off.
>>>
>>> Looks like it happened in commit: bbaf6029c49c ("samples/bpf: Convert
>>> XDP samples to libbpf usage") (Cc Maciej).
>>>
>>> The old bpf_load.c will auto attach the tracepoints... for and libbpf
>>> you have to be explicit about it.
>>
>> ... or you can use skeleton, which will auto-attach them as well,
>> provided BPF program's section names follow expected naming
>> convention. So it might be a good idea to try it out.
> 
> To Andrii, can you provide some more info on how to use this new
> skeleton system of yours?  (Pointers to code examples?)

There's a man page ;-)

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/tree/tools/bpf/bpftool/Documentation/bpftool-gen.rst