From: patchwork-bot+netdevbpf@kernel.org
To: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: bpf@vger.kernel.org, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, horms@kernel.org,
ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org,
john.fastabend@gmail.com, sdf@fomichev.me, kuniyu@google.com,
liuhangbin@gmail.com, krikku@gmail.com, mkarsten@uwaterloo.ca,
andriin@fb.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next] bpf, xdp: move offload check into dev_xdp_install()
Date: Mon, 17 Aug 2026 17:30:37 +0000 [thread overview]
Message-ID: <178698783797.1666117.698643856348207432.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260812063616.364817-1-jiayuan.chen@linux.dev>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Wed, 12 Aug 2026 14:36:11 +0800 you wrote:
> bpf_xdp_link_update() calls dev_xdp_install() directly and skips
> dev_xdp_attach(), so the checks in dev_xdp_attach() do not run. A user can
> make an XDP link with a normal program and then swap in an offloaded or
> device-bound program with BPF_LINK_UPDATE, which puts it on the software
> path.
>
> dev_xdp_install() is the one place all three paths go through:
> "ip link set xdp" and BPF_LINK_CREATE reach it via dev_xdp_attach(), and
> BPF_LINK_UPDATE calls it directly. So move the program checks (offloaded,
> bound to another device, device-bound in generic mode, native vs generic,
> DEVMAP and CPUMAP) there, and keep only the netlink-flag check
> (XDP_FLAGS_UPDATE_IF_NOEXIST) in dev_xdp_attach().
>
> [...]
Here is the summary with links:
- [net-next] bpf, xdp: move offload check into dev_xdp_install()
https://git.kernel.org/netdev/net/c/ad27ed7d2309
You are awesome, thank you!
--
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prev parent reply other threads:[~2026-08-17 17:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-12 6:36 [PATCH net-next] bpf, xdp: move offload check into dev_xdp_install() Jiayuan Chen
2026-08-17 17:30 ` patchwork-bot+netdevbpf [this message]
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