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

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Date:   Sat, 8 Oct 2022 13:22:35 +0800
From:   wangyufen <wangyufen@...wei.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.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


在 2022/10/1 4:55, Andrii Nakryiko 写道:
> 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).

Thanks, will add a cover letter in v8.

>
>
>> 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(-)
>>
> [...]
>