netdev - Re: [PATCH bpf-next v4 5/6] selftests/bpf: add test for XDP metadata support in tun driver

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Message-ID: <Z8DmjRy9g_vFX4lj@mini-arch>
Date: Thu, 27 Feb 2025 14:26:21 -0800
From: Stanislav Fomichev <stfomichev@...il.com>
To: Marcus Wichelmann <marcus.wichelmann@...zner-cloud.de>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
	willemdebruijn.kernel@...il.com, jasowang@...hat.com,
	andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, ast@...nel.org,
	daniel@...earbox.net, andrii@...nel.org, martin.lau@...ux.dev,
	eddyz87@...il.com, song@...nel.org, yonghong.song@...ux.dev,
	john.fastabend@...il.com, kpsingh@...nel.org, sdf@...ichev.me,
	haoluo@...gle.com, jolsa@...nel.org, mykolal@...com,
	shuah@...nel.org, hawk@...nel.org
Subject: Re: [PATCH bpf-next v4 5/6] selftests/bpf: add test for XDP metadata
 support in tun driver

On 02/27, Marcus Wichelmann wrote:
> Add a selftest that creates a tap device, attaches XDP and TC programs,
> writes a packet with a test payload into the tap device and checks the
> test result. This test ensures that the XDP metadata support in the tun
> driver is enabled and that the metadata size is correctly passed to the
> skb.
> 
> See the previous commit ("selftests/bpf: refactor xdp_context_functional
> test and bpf program") for details about the test design.
> 
> The test runs in its own network namespace using the feature introduced
> with commit c047e0e0e435 ("selftests/bpf: Optionally open a dedicated
> namespace to run test in it"). This provides some extra safety against
> conflicting interface names.
> 
> Signed-off-by: Marcus Wichelmann <marcus.wichelmann@...zner-cloud.de>

Acked-by: Stanislav Fomichev <sdf@...ichev.me>