netdev - Re: [bpf-next v4 2/3] bpftool: Update doc (add auto

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Date:   Wed, 21 Sep 2022 15:15:01 +0800
From:   wangyufen <wangyufen@...wei.com>
To:     Quentin Monnet <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>
CC:     <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <netdev@...r.kernel.org>, <llvm@...ts.linux.dev>
Subject: Re: [bpf-next v4 2/3] bpftool: Update doc (add auto_attach to prog
 load)


在 2022/9/20 23:12, Quentin Monnet 写道:
> Tue Sep 13 2022 03:54:46 GMT+0100 (British Summer Time) ~ Wang Yufen
> <wangyufen@...wei.com>
>> Add auto_attach optional to prog load|loadall for supporting
>> one-step load-attach-pin_link.
>>
>> Signed-off-by: Wang Yufen <wangyufen@...wei.com>
>> ---
>>   tools/bpf/bpftool/Documentation/bpftool-prog.rst | 12 ++++++++++--
>>   1 file changed, 10 insertions(+), 2 deletions(-)
>>
>> diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
>> index eb1b2a2..463f895 100644
>> --- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
>> +++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
>> @@ -31,7 +31,7 @@ PROG COMMANDS
>>   |	**bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual** | **linum**}]
>>   |	**bpftool** **prog dump jited**  *PROG* [{**file** *FILE* | **opcodes** | **linum**}]
>>   |	**bpftool** **prog pin** *PROG* *FILE*
>> -|	**bpftool** **prog** { **load** | **loadall** } *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*]
>> +|	**bpftool** **prog** { **load** | **loadall** } *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*] [**auto_attach**]
>>   |	**bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
>>   |	**bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
>>   |	**bpftool** **prog tracelog**
>> @@ -131,7 +131,7 @@ DESCRIPTION
>>   		  contain a dot character ('.'), which is reserved for future
>>   		  extensions of *bpffs*.
>>   
>> -	**bpftool prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*]
>> +	**bpftool prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*] [**auto_attach**]
>>   		  Load bpf program(s) from binary *OBJ* and pin as *PATH*.
>>   		  **bpftool prog load** pins only the first program from the
>>   		  *OBJ* as *PATH*. **bpftool prog loadall** pins all programs
>> @@ -150,6 +150,14 @@ DESCRIPTION
>>   		  Optional **pinmaps** argument can be provided to pin all
>>   		  maps under *MAP_DIR* directory.
>>   
>> +		  If **auto_attach** is specified program will be attached
>> +		  before pin. 1)in that case, only the link (representing the program
> "1)in" -> "In"
>
>> +		  attached to its hook) is pinned, not the program as such, so the
>> +		  path won't show in "bpftool prog show -f", only show in
> Let's use markup instead of quotes around the commands please, **bpftool
> prog show -f** and **bpftool link show -f** (below).
>
>> +		  "bpftool link show -f", and 2)this only works when bpftool (libbpf)
> ", and 2)this..." -> ". Also, this..."
>
>> +		  is able to infer all necessary information from the object file,
>> +		  in particular, it's not supported for all program types.
>> +
>>   		  Note: *PATH* must be located in *bpffs* mount. It must not
>>   		  contain a dot character ('.'), which is reserved for future
>>   		  extensions of *bpffs*.
> Apart from the formatting nits above, looks good, thank you.
Thanks， will send v5