netdev - Re: [PATCH v10 bpf-next 10/14] bpf: Add d

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Message-ID: <CAEf4BzaQOPYO3JYyJ3HKGWHdpKC7N-oKMPmOxnke8nXbZ2va9Q@mail.gmail.com>
Date:   Fri, 7 Aug 2020 13:05:21 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Martin KaFai Lau <kafai@...com>,
        David Miller <davem@...hat.com>,
        John Fastabend <john.fastabend@...il.com>,
        Wenbo Zhang <ethercflow@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Brendan Gregg <bgregg@...flix.com>,
        Florent Revest <revest@...omium.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v10 bpf-next 10/14] bpf: Add d_path helper

On Fri, Aug 7, 2020 at 2:48 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> Adding d_path helper function that returns full path for
> given 'struct path' object, which needs to be the kernel
> BTF 'path' object. The path is returned in buffer provided
> 'buf' of size 'sz' and is zero terminated.
>
>   bpf_d_path(&file->f_path, buf, size);
>
> The helper calls directly d_path function, so there's only
> limited set of function it can be called from. Adding just
> very modest set for the start.
>
> Updating also bpf.h tools uapi header and adding 'path' to
> bpf_helpers_doc.py script.
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---

Acked-by: Andrii Nakryiko <andriin@...com>

>  include/uapi/linux/bpf.h       | 13 +++++++++
>  kernel/trace/bpf_trace.c       | 48 ++++++++++++++++++++++++++++++++++
>  scripts/bpf_helpers_doc.py     |  2 ++
>  tools/include/uapi/linux/bpf.h | 13 +++++++++
>  4 files changed, 76 insertions(+)
>

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