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Message-ID: <ZS_kr7X5Jwo4x360@u94a>
Date: Wed, 18 Oct 2023 21:59:11 +0800
From: Shung-Hsi Yu <shung-hsi.yu@...e.com>
To: netdev@...r.kernel.org
Cc: Stephen Hemminger <stephen@...workplumber.org>,
David Ahern <dsahern@...nel.org>,
Toke Høiland-Jørgensen <toke@...hat.com>
Subject: Re: [PATCH iproute2-next 0/2] Increase BPF verifier verbosity when
in verbose mode
On Wed, Oct 18, 2023 at 02:22:32PM +0800, Shung-Hsi Yu wrote:
> When debugging BPF verifier issue, it is useful get as much information
> out of the verifier as possible to help diagnostic, but right now that
> is not possible because load_bpf_object() does not set the
> kernel_log_level in bpf_open_opts, which is addressed in patch 1.
>
> Patch 2 further allows increasing the log level in verbose mode, so even
> more information can be retrieved out of the verifier, and most
> importlantly, show verifier log even on successful BPF program load.
Got some typos in patch 2, and bpf_open_opts should be bpf_object_open_opts.
Will send v2 to correct these mistakes.
> Shung-Hsi Yu (2):
> libbpf: set kernel_log_level when available
> bpf: increase verifier verbosity when in verbose mode
>
> include/bpf_util.h | 4 ++--
> ip/ipvrf.c | 3 ++-
> lib/bpf_legacy.c | 10 ++++++----
> lib/bpf_libbpf.c | 6 ++++++
> 4 files changed, 16 insertions(+), 7 deletions(-)
>
>
> base-commit: 575322b09c3c6bc1806f2faa31edcfb64df302bb
> --
> 2.42.0
>
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