Re: [PATCH bpf-next v5 1/2] bpf, xdp: Add tracepoint to xdp attaching failure

On Tue, 1 Aug 2023 22:26:20 +0800 Leon Hwang wrote:

When error happens in dev_xdp_attach(), it should have a way to tell users the error message like the netlink approach.

To avoid breaking uapi, adding a tracepoint in bpf_xdp_link_attach() is an appropriate way to notify users the error message.

Hence, bpf libraries are able to retrieve the error message by this tracepoint, and then report the error message to users.

Whatevered-by: Jakub Kicinski kuba@kernel.org ?