netdev - Re: [PATCH v10 perf, bpf-next 9/9] bpf: add module name [bpf] to ksymbols for bpf programs

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Date:   Thu, 17 Jan 2019 14:10:44 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Song Liu <songliubraving@...com>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        acme@...nel.org, ast@...nel.org, daniel@...earbox.net,
        kernel-team@...com, dsahern@...il.com
Subject: Re: [PATCH v10 perf, bpf-next 9/9] bpf: add module name [bpf] to
 ksymbols for bpf programs

On Wed, Jan 16, 2019 at 08:29:31AM -0800, Song Liu wrote:
> With this patch, /proc/kallsyms will show BPF programs as
> 
>   <addr> t bpf_prog_<tag>_<name> [bpf]
> 
> Signed-off-by: Song Liu <songliubraving@...com>

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>

> ---
>  kernel/kallsyms.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
> index f3a04994e063..14934afa9e68 100644
> --- a/kernel/kallsyms.c
> +++ b/kernel/kallsyms.c
> @@ -494,7 +494,7 @@ static int get_ksymbol_ftrace_mod(struct kallsym_iter *iter)
>  
>  static int get_ksymbol_bpf(struct kallsym_iter *iter)
>  {
> -	iter->module_name[0] = '\0';
> +	strlcpy(iter->module_name, "bpf", MODULE_NAME_LEN);
>  	iter->exported = 0;
>  	return bpf_get_kallsym(iter->pos - iter->pos_ftrace_mod_end,
>  			       &iter->value, &iter->type,
> -- 
> 2.17.1
>