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Subject: Re: [PATCH bpf] libbpf: Fix bpf_xdp_query() in old kernels
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <167754121711.19048.9342789016120820880.git-patchwork-notify@kernel.org>
Date:   Mon, 27 Feb 2023 23:40:17 +0000
References: <20230227224943.1153459-1-yhs@fb.com>
In-Reply-To: <20230227224943.1153459-1-yhs@fb.com>
To:     Yonghong Song <yhs@fb.com>
Cc:     bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org,
        daniel@iogearbox.net, kernel-team@fb.com, martin.lau@kernel.org,
        lorenzo@kernel.org
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X-Mailing-List: bpf@vger.kernel.org

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@kernel.org>:

On Mon, 27 Feb 2023 14:49:43 -0800 you wrote:
> Commit 04d58f1b26a4("libbpf: add API to get XDP/XSK supported features")
> added feature_flags to struct bpf_xdp_query_opts. If a user uses
> bpf_xdp_query_opts with feature_flags member, the bpf_xdp_query()
> will check whether 'netdev' family exists or not in the kernel.
> If it does not exist, the bpf_xdp_query() will return -ENOENT.
> 
> But 'netdev' family does not exist in old kernels as it is
> introduced in the same patch set as Commit 04d58f1b26a4.
> So old kernel with newer libbpf won't work properly with
> bpf_xdp_query() api call.
> 
> [...]

Here is the summary with links:
  - [bpf] libbpf: Fix bpf_xdp_query() in old kernels
    https://git.kernel.org/bpf/bpf-next/c/c8ee37bde402

You are awesome, thank you!
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