On Fri, Apr 14, 2023 at 06:15:41PM -0700, Alexei Starovoitov wrote:
On Fri, Apr 14, 2023 at 9:28 AM Andrea Righi andrea.righi@canonical.com wrote:
On Fri, Apr 14, 2023 at 06:15:38PM +0200, Ilya Leoshkevich wrote:
On Fri, Apr 14, 2023 at 08:15:03AM +0200, Andrea Righi wrote:
On Thu, Apr 13, 2023 at 09:56:00PM -0700, Alexei Starovoitov wrote:
On Wed, Apr 12, 2023 at 2:59 AM Andrea Righi andrea.righi@canonical.com wrote:
Building bpf selftests with clang can trigger errors like the following:
CLNG-BPF [test_maps] bpf_iter_netlink.bpf.o progs/bpf_iter_netlink.c:32:4: error: incompatible pointer types assigning to 'struct sock *' from 'struct sock___17 *' [-Werror,-Wincompatible-pointer-types] s = &nlk->sk; ^ ~~~~~~~~ 1 error generated.
I cannot reproduce this and BPF CI doesn't complain about it either. What kind of clang do you use? Some special version and build flags?
I'm using Ubuntu clang version 15.0.7 (Ubuntu 23.04), no special build flag (unless Ubuntu enables some different default flags, but it shouldn't be the case... I'll double check).
-Andrea
Hi,
FWIW, I see similar errors when I don't use recent pahole.
I'm using pahole v1.24.
I believe Ilya is correct.
struct sock___17 is likely coming from vmlinux.h Which means that there were errors due vmlinux build which caused multiple structs to be present in BTF and therefore bpftool generated such broken vmlinux.h
The BTF section in such vmlinux is likely much larger than normal. Let's get to the bottom of it instead of masking build error.
Please try pahole 1.25.
Yay! Success. Everything is working fine with pahole 1.25. Please ignore my patch, the fix is to simply upgrade pahole.
Thanks! -Andrea