Subject: Re: [PATCH net-next V6 2/5] selftests: drv-net: Test XDP_PASS/DROP support

From: Jakub Kicinski <[email-masked]>
Date: Mon, 21 Jul 2025 13:24:11 -0700

On Mon, 21 Jul 2025 12:43:57 -0700 Martin KaFai Lau wrote:
> On 7/21/25 4:43 AM, Nimrod Oren wrote:
> > To ensure correctness across all drivers, all direct accesses to packet
> > data should use these safer helper functions instead:
> > bpf_xdp_load_bytes() and bpf_xdp_store_bytes().  
> 
> Not sure if the test will be run on the older kernel. fwiw, there is a 
> bpf_dynptr_slice_rdwr() kfunc which was added in commit 66e3a13e7c2c.
> It uses bpf_xdp_pointer() underneath, so it can avoid a copy if the requested 
> data is contained in a single frag.

We discussed running the tests on stable but nothing materialized, yet.