netdev - Re: [PATCH bpf-next v3 14/15] tools/bpf: add udp4/udp6 bpf iterator

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Date:   Tue, 23 Jun 2020 08:03:52 -0700
From:   Yonghong Song <yhs@...com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
CC:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <kernel-team@...com>,
        Martin KaFai Lau <kafai@...com>
Subject: Re: [PATCH bpf-next v3 14/15] tools/bpf: add udp4/udp6 bpf iterator



On 6/22/20 11:57 PM, Andrii Nakryiko wrote:
> On Mon, Jun 22, 2020 at 5:38 PM Yonghong Song <yhs@...com> wrote:
>>
>> On my VM, I got identical results between /proc/net/udp[6] and
>> the udp{4,6} bpf iterator.
>>
>> For udp6:
>>    $ cat /sys/fs/bpf/p1
>>      sl  local_address                         remote_address                        st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode ref pointer drops
>>     1405: 000080FE00000000FF7CC4D0D9EFE4FE:0222 00000000000000000000000000000000:0000 07 00000000:00000000 00:00000000 00000000   193        0 19183 2 0000000029eab111 0
>>    $ cat /proc/net/udp6
>>      sl  local_address                         remote_address                        st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode ref pointer drops
>>     1405: 000080FE00000000FF7CC4D0D9EFE4FE:0222 00000000000000000000000000000000:0000 07 00000000:00000000 00:00000000 00000000   193        0 19183 2 0000000029eab111 0
>>
>> For udp4:
>>    $ cat /sys/fs/bpf/p4
>>      sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode ref pointer drops
>>     2007: 00000000:1F90 00000000:0000 07 00000000:00000000 00:00000000 00000000     0        0 72540 2 000000004ede477a 0
>>    $ cat /proc/net/udp
>>      sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode ref pointer drops
>>     2007: 00000000:1F90 00000000:0000 07 00000000:00000000 00:00000000 00000000     0        0 72540 2 000000004ede477a 0
>> ---
> 
> patch subject prefix is misleading: tools/bpf -> selftests/bpf?

Sure I can do this.

> 
> Otherwise:
> 
> Acked-by: Andrii Nakryiko <andriin@...com>
> 
>>   tools/testing/selftests/bpf/progs/bpf_iter.h  | 16 ++++
>>   .../selftests/bpf/progs/bpf_iter_udp4.c       | 71 +++++++++++++++++
>>   .../selftests/bpf/progs/bpf_iter_udp6.c       | 79 +++++++++++++++++++
>>   3 files changed, 166 insertions(+)
>>   create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_udp4.c
>>   create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_udp6.c
>>
> 
> [...]
>