Re: [PATCH net-next] bpf, xdp: move offload check into dev_xdp_install()

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <[email protected]>:

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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