linux-kernel - Re: [PATCH bpf-next] selftests/bpf: Fix building error when using userspace pt

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Date:   Wed, 15 Dec 2021 09:20:34 +0800
From:   Pu Lehui <pulehui@...wei.com>
To:     Daniel Borkmann <daniel@...earbox.net>, <ast@...nel.org>,
        <andrii@...nel.org>, <kafai@...com>, <songliubraving@...com>,
        <yhs@...com>, <john.fastabend@...il.com>, <kpsingh@...nel.org>,
        <paul.walmsley@...ive.com>, <palmer@...belt.com>,
        <aou@...s.berkeley.edu>, <shuah@...nel.org>
CC:     <linux-kselftest@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next] selftests/bpf: Fix building error when using
 userspace pt_regs

On 2021/12/15 4:01, Daniel Borkmann wrote:
> On 12/14/21 2:55 PM, Pu Lehui wrote:
>> When building bpf selftests on arm64, the following error will occur:
>>
>> progs/loop2.c:20:7: error: incomplete definition of type 'struct
>> user_pt_regs'
>>
>> Some archs, like arm64 and riscv, use userspace pt_regs in
>> bpf_tracing.h, which causes build failure when bpf prog use
>> macro in bpf_tracing.h. So let's use vmlinux.h directly.
>>
>> Signed-off-by: Pu Lehui <pulehui@...wei.com>
> 
> Looks like this lets CI fail, did you run the selftests also with 
> vmtest.sh to
> double check?
> 
> https://github.com/kernel-patches/bpf/runs/4521708490?check_suite_focus=true 
> :
> 
> [...]
> #189 verif_scale_loop6:FAIL
> libbpf: prog 'trace_virtqueue_add_sgs': BPF program load failed: 
> Argument list too long
> libbpf: prog 'trace_virtqueue_add_sgs': -- BEGIN PROG LOAD LOG --
> R1 type=ctx expected=fp
> BPF program is too large. Processed 1000001 insn
> verification time 12250995 usec
> stack depth 88
> processed 1000001 insns (limit 1000000) max_states_per_insn 107 
> total_states 21739 peak_states 2271 mark_read 6
> -- END PROG LOAD LOG --
> libbpf: failed to load program 'trace_virtqueue_add_sgs'
> libbpf: failed to load object 'loop6.o'
> scale_test:FAIL:expect_success unexpected error: -7 (errno 7)
> Summary: 221/986 PASSED, 8 SKIPPED, 1 FAILED
> [...]
> 
> Please take a look and fix in your patch, thanks!
> .
Sorry for my negligence, I'll take a look and fix it.