Loading of XDP program fails with `missing BPF prog type, check ELF section name 'xdp/dispatcher'`

[Frode Nordahl]

The Open vSwitch project makes use of libbpf and libxdp to enable use of AF_XDP.

If Open vSwitch is compiled with libbpf 0.8 (which corresponds to libpf from a 5.19 kernel) it works OK.

If it is compiled with a more recent libbpf, attaching the XDP program fails with:

libbpf: prog 'xdp_dispatcher': missing BPF prog type, check ELF section name 'xdp/dispatcher'
libbpf: prog 'xdp_dispatcher': failed to load: -22

I suspect xdp-tools need an update similar to [0] after [1].

0: https://lore.kernel.org/lkml/[e-mail]/T/
1: torvalds/linux@450b167

cc @igsilya

[Toke Høiland-Jørgensen]

Which version of libxdp are you using? This has already been fixed in commit: d165118 ("libxdp: Convert xdp-dispatcher to use strict section name")

[HIQ Society]

@fnordahl i think u need to copy everything *.o <- generated when u run together in the folder too.

[Frode Nordahl]

Thank you for the pointer @tohojo, building with xdp-tools from tip of master does indeed work.

The commit does not appear to be part of any xdp-tools tag/release and the last release is a few months old, is a new release planned anytime soon?

[Toke Høiland-Jørgensen]

Frode Nordahl ***@***.***> writes:

Thank you for the pointer @tohojo, building with xdp-tools from tip of master does indeed work.

Great!

The commit does not appear to be part of any xdp-tools tag/release and the last release is a few years old, is a new release planned anytime soon?

Yeah, I backported it to the 1.2 branch and will tag a new release as soon as I'm done with #158

[Toke Høiland-Jørgensen]

This is now included in v1.2.9

[Frode Nordahl]

Thank you for the quick turnaround @tohojo, much appreciated! We'll make sure those bits get out there

[Toke Høiland-Jørgensen]

Great! You're welcome :)