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

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Date:   Wed, 21 Mar 2018 16:39:09 +0000
From:   Quentin Monnet <quentin.monnet@...ronome.com>
To:     Jiri Olsa <jolsa@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     lkml <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] bpftool: Adjust to new print_bpf_insn interface

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?

Quentin