netdev - Re: [PATCH net 2/2] wireguard: selftests: add metadata

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Date:   Thu, 14 Apr 2022 14:06:04 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Nikolay Aleksandrov <razor@...ckwall.org>
Cc:     Netdev <netdev@...r.kernel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martynas Pumputis <m@...bda.lt>,
        WireGuard mailing list <wireguard@...ts.zx2c4.com>,
        Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>
Subject: Re: [PATCH net 2/2] wireguard: selftests: add metadata_dst xmit selftest

Hi Nikolay,

These tests need to run in the minimal fast-to-compile test harness
inside of tools/testing/selftests/wireguard/qemu, which you can try
out with:

$ make -C tools/testing/selftests/wireguard/qemu -j$(nproc)

Currently iproute2 is built, but only ip(8) is used in the image, so
you'll need to add tc(8) to there. Clang, however, seems a bit
heavyweight. I suspect it'd make more sense to just base64 up that
object file and include it as a string in the file? Or, alternatively,
we could just not move ahead with this rather niche test, and revisit
the issue if we wind up wanting to test for lots of bpf things.
Thoughts on that?

Jason