Re: [PATCH net-next v2 2/2] selftests/bpf: verify syncookie statistics in tcp_custom_syncookie

[Paolo Abeni <pabeni@redhat.com>]

On 4/14/26 7:50 AM, Kuniyuki Iwashima wrote:
> On Fri, Apr 10, 2026 at 6:32 PM Jiayuan Chen <jiayuan.chen@linux.dev> wrote:
>>
>> Add read_tcpext_snmp() helper to network_helpers which reads a
>> TcpExt SNMP counter via nstat, and use it in the tcp_custom_syncookie
>> test to verify that LINUX_MIB_SYNCOOKIESRECV is incremented and
>> LINUX_MIB_SYNCOOKIESFAILED stays unchanged across a successful
>> BPF custom syncookie validation.
>>
>> The delta is captured between start_server() and accept(), which
>> covers the full SYN/ACK/cookie-check path for one connection.
>>
>> Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
>> ---
>>  tools/testing/selftests/bpf/network_helpers.c | 22 +++++++++++++++++++
>>  tools/testing/selftests/bpf/network_helpers.h |  1 +
>>  .../bpf/prog_tests/tcp_custom_syncookie.c     | 20 +++++++++++++++++
> 
> As you touch bpf selftest helper files, please rebase on bpf-next
> to avoid possible conflicts and tag bpf-next in the Subject.

To hopefully  minimize the conflicts handling I'm going to apply patch
1/2 to net-next. Please resubmit patch 2/2 to bpf-next after the
relevant net core reach there.

/P