linux-kernel - Re: [PATCH 2/2] bpftool: Adjust to new print_bpf

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Date:   Wed, 21 Mar 2018 17:44:52 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jiri Olsa <jolsa@...hat.com>,
        Quentin Monnet <quentin.monnet@...ronome.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] bpftool: Adjust to new print_bpf_insn interface

On 03/21/2018 05:43 PM, Jiri Olsa wrote:
> On Wed, Mar 21, 2018 at 04:39:09PM +0000, Quentin Monnet wrote:
>> 2018-03-21 16:02 UTC+0100 ~ Jiri Olsa <jolsa@...nel.org>
>>> Change bpftool to skip the removed struct bpf_verifier_env
>>> argument in print_bpf_insn. It was passed as NULL anyway.
>>>
>>> No functional change intended.
>>>
>>> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
>>> ---
>>>  tools/bpf/bpftool/prog.c | 8 ++++----
>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
>>> index e549e329be82..108001d974ee 100644
>>> --- a/tools/bpf/bpftool/prog.c
>>> +++ b/tools/bpf/bpftool/prog.c
>>> @@ -489,7 +489,7 @@ static struct kernel_sym *kernel_syms_search(struct dump_data *dd,
>>>  		       sizeof(*dd->sym_mapping), kernel_syms_cmp) : NULL;
>>>  }
>>>  
>>> -static void print_insn(struct bpf_verifier_env *env, const char *fmt, ...)
>>> +static void print_insn(void *private_data, const char *fmt, ...)
>>>  {
>>>  	va_list args;
>>>  
>>> @@ -576,7 +576,7 @@ static void dump_xlated_plain(struct dump_data *dd, void *buf,
>>>  		double_insn = insn[i].code == (BPF_LD | BPF_IMM | BPF_DW);
>>>  
>>>  		printf("% 4d: ", i);
>>> -		print_bpf_insn(&cbs, NULL, insn + i, true);
>>> +		print_bpf_insn(&cbs, insn + i, true);
>>>  
>>>  		if (opcodes) {
>>>  			printf("       ");
>>> @@ -590,7 +590,7 @@ static void dump_xlated_plain(struct dump_data *dd, void *buf,
>>>  	}
>>>  }
>>>  
>>> -static void print_insn_json(struct bpf_verifier_env *env, const char *fmt, ...)
>>> +static void print_insn_json(void *private_data, const char *fmt, ...)
>>>  {
>>>  	unsigned int l = strlen(fmt);
>>>  	char chomped_fmt[l];
>>> @@ -628,7 +628,7 @@ static void dump_xlated_json(struct dump_data *dd, void *buf,
>>>  
>>>  		jsonw_start_object(json_wtr);
>>>  		jsonw_name(json_wtr, "disasm");
>>> -		print_bpf_insn(&cbs, NULL, insn + i, true);
>>> +		print_bpf_insn(&cbs, insn + i, true);
>>>  
>>>  		if (opcodes) {
>>>  			jsonw_name(json_wtr, "opcodes");
>>>
>>
>> Hi Jiri, this code has changed in the tree. It was moved to
>> tools/bpf/bpftool/xlated_dumper.c, and there is now a third function to
>> update: print_insn_for_graph(). Could you please rebase the patch?
> 
> sure.. I was over perf tree, I'll check on bpf tree

Just to be sure, it should be bpf-next. bpf is for fixes only.

Thanks,
Daniel