Can a tc prog understand and load the BTF section?

[RenjiaWang]

When I wrote a BTF loader by myself, I found that the prog types such as xdp and tracepoint can load the btf section very well, but the TC program always has errors when loading into the kernel. So I would like to ask if the TC program itself cannot support BTF? Thank you, looking forward to your reply

[florianl]

Without more detail is it hard to tell the differences in your BTF loader. As attaching to XDP, to a tracepoint and TC (traffic control) is independent of loading a eBPF program and optional its BTF, I think there is a different problem.

Taking a look at existing examples github.com/cilium/ebpf/examples/xdp for XDP or github.com/florianl/go-tc/example_gteq_1.16_test.go for TC the sequence of loading and attaching is following similar steps:

1. Load eBPF program (optional with BTF)
   This is happening here for the XDP example and here for the TC example.
2. Attach eBPF program
   This is happening here for the XDP example and here for the TC example.

So to speak, eBPF prgrams of type SchedCLS that can be attached to TC can make use of BTF similar to other eBPF programs.

[RenjiaWang]

Thank you for your reply, I have located the problem, it is not related to TC