Re: [PATCH net-next 2/3] xsk: honor XDP_TX_METADATA in zero-copy path

Alexander Lobakin <[email protected]>
Newsgroups org.kernel.vger.linux-rdma,org.infradead.lists.linux-arm-kernel,org.kernel.vger.bpf,org.kernel.vger.linux-kernel,org.kernel.vger.netdev,org.osuosl.intel-wired-lan
Message-ID <[email protected]> 
From: Stanislav Fomichev <[email protected]>
Date: Mon, 10 Aug 2026 11:47:52 -0700

> The zero-copy path reads TX metadata whenever the UMEM has metadata space,
> even if the descriptor does not set XDP_TX_METADATA. Pass descriptor
> options through the metadata helpers and ignore metadata unless the option
> is set.
> 
> This does not change the existing per-WQE metadata handling for mlx5
> MPWQEs, where the descriptor that starts a session configures offload state
> shared by the batch. Supporting mixed metadata states within one MPWQE
> requires a separate fix.
> 
> Fixes: 48eb03dd2630 ("xsk: Add TX timestamp and TX checksum offload support")
> Signed-off-by: Stanislav Fomichev <[email protected]>

Reviwed-by: Alexander Lobakin <[email protected]>

Thanks,
Olek
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