From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Dave Marchevsky <davemarchevsky@fb.com>
Cc: bpf <bpf@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>, Yonghong Song <yhs@fb.com>,
Networking <netdev@vger.kernel.org>
Subject: Re: [PATCH v3 bpf-next 2/7] bpf: add bpf_trace_vprintk helper
Date: Mon, 30 Aug 2021 16:35:28 -0700 [thread overview]
Message-ID: <CAEf4BzaGgyCpVLDc5g96+hze-HXfduERQMHDev0O0Ea6NdhGdQ@mail.gmail.com> (raw)
In-Reply-To: <20210828052006.1313788-3-davemarchevsky@fb.com>
On Fri, Aug 27, 2021 at 10:20 PM Dave Marchevsky <davemarchevsky@fb.com> wrote:
>
> This helper is meant to be "bpf_trace_printk, but with proper vararg
> support". Follow bpf_snprintf's example and take a u64 pseudo-vararg
> array. Write to /sys/kernel/debug/tracing/trace_pipe using the same
> mechanism as bpf_trace_printk.
>
> Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
> ---
LGTM.
Acked-by: Andrii Nakryiko <andrii@kernel.org>
> include/linux/bpf.h | 1 +
> include/uapi/linux/bpf.h | 9 ++++++
> kernel/bpf/core.c | 5 ++++
> kernel/bpf/helpers.c | 2 ++
> kernel/trace/bpf_trace.c | 52 +++++++++++++++++++++++++++++++++-
> tools/include/uapi/linux/bpf.h | 9 ++++++
> 6 files changed, 77 insertions(+), 1 deletion(-)
>
[...]
next prev parent reply other threads:[~2021-08-30 23:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-28 5:19 [PATCH v3 bpf-next 0/7] bpf: implement variadic printk helper Dave Marchevsky
2021-08-28 5:20 ` [PATCH v3 bpf-next 1/7] bpf: merge printk and seq_printf VARARG max macros Dave Marchevsky
2021-08-28 5:20 ` [PATCH v3 bpf-next 2/7] bpf: add bpf_trace_vprintk helper Dave Marchevsky
2021-08-30 23:35 ` Andrii Nakryiko [this message]
2021-09-03 8:00 ` Daniel Borkmann
2021-09-13 17:30 ` Dave Marchevsky
2021-08-28 5:20 ` [PATCH v3 bpf-next 3/7] libbpf: Modify bpf_printk to choose helper based on arg count Dave Marchevsky
2021-08-28 16:44 ` Dave Marchevsky
2021-08-28 5:20 ` [PATCH v3 bpf-next 4/7] libbpf: use static const fmt string in __bpf_printk Dave Marchevsky
2021-08-28 16:40 ` Dave Marchevsky
2021-08-29 16:57 ` Alexei Starovoitov
2021-08-31 0:36 ` Andrii Nakryiko
2021-08-31 0:37 ` Andrii Nakryiko
2021-08-28 5:20 ` [PATCH v3 bpf-next 5/7] bpftool: only probe trace_vprintk feature in 'full' mode Dave Marchevsky
2021-08-28 5:20 ` [PATCH v3 bpf-next 6/7] selftests/bpf: Migrate prog_tests/trace_printk CHECKs to ASSERTs Dave Marchevsky
2021-08-31 0:03 ` Andrii Nakryiko
2021-08-28 5:20 ` [PATCH v3 bpf-next 7/7] selftests/bpf: add trace_vprintk test prog Dave Marchevsky
2021-08-31 0:04 ` Andrii Nakryiko
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