netdev - Re: [bpf-next v7 1/3] bpftool: Add auto_attach for bpf prog load|loadall

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Message-ID: <CAEf4BzaBPpZvxD6sDMWWRXVqKYTgwaxsggye0CRbv7q5_4jrPA@mail.gmail.com>
Date:   Fri, 30 Sep 2022 13:55:02 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Wang Yufen <wangyufen@...wei.com>
Cc:     quentin@...valent.com, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
        yhs@...com, john.fastabend@...il.com, kpsingh@...nel.org,
        sdf@...gle.com, haoluo@...gle.com, jolsa@...nel.org,
        davem@...emloft.net, kuba@...nel.org, hawk@...nel.org,
        nathan@...nel.org, ndesaulniers@...gle.com, trix@...hat.com,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [bpf-next v7 1/3] bpftool: Add auto_attach for bpf prog load|loadall

On Tue, Sep 27, 2022 at 4:00 AM Wang Yufen <wangyufen@...wei.com> wrote:
>
> Add auto_attach optional to support one-step load-attach-pin_link.
>
> For example,
>    $ bpftool prog loadall test.o /sys/fs/bpf/test autoattach
>
>    $ bpftool link
>    26: tracing  name test1  tag f0da7d0058c00236  gpl
>         loaded_at 2022-09-09T21:39:49+0800  uid 0
>         xlated 88B  jited 55B  memlock 4096B  map_ids 3
>         btf_id 55
>    28: kprobe  name test3  tag 002ef1bef0723833  gpl
>         loaded_at 2022-09-09T21:39:49+0800  uid 0
>         xlated 88B  jited 56B  memlock 4096B  map_ids 3
>         btf_id 55
>    57: tracepoint  name oncpu  tag 7aa55dfbdcb78941  gpl
>         loaded_at 2022-09-09T21:41:32+0800  uid 0
>         xlated 456B  jited 265B  memlock 4096B  map_ids 17,13,14,15
>         btf_id 82
>
>    $ bpftool link
>    1: tracing  prog 26
>         prog_type tracing  attach_type trace_fentry
>    3: perf_event  prog 28
>    10: perf_event  prog 57
>
> The autoattach optional can support tracepoints, k(ret)probes,
> u(ret)probes.
>
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> Signed-off-by: Wang Yufen <wangyufen@...wei.com>
> ---

For next revision, please also attach cover letter describing the
overall goal of the patch set (and that's where the version log
between revisions is put as well).


> v6 -> v7: add info msg print and update doc for the skip program
> v5 -> v6: skip the programs not supporting auto-attach,
>           and change optional name from "auto_attach" to "autoattach"
> v4 -> v5: some formatting nits of doc
> v3 -> v4: rename functions, update doc, bash and do_help()
> v2 -> v3: switch to extend prog load command instead of extend perf
> v2: https://patchwork.kernel.org/project/netdevbpf/patch/20220824033837.458197-1-weiyongjun1@huawei.com/
> v1: https://patchwork.kernel.org/project/netdevbpf/patch/20220816151725.153343-1-weiyongjun1@huawei.com/
>  tools/bpf/bpftool/prog.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 79 insertions(+), 2 deletions(-)
>

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