linux-kernel - Re: [PATCH bpf] libbpf: Return btf_fd in libbpf__probe_raw

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Date:   Wed, 29 May 2019 12:59:59 +0000
From:   Michal Rostecki <mrostecki@...nsuse.org>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:     Michal Rostecki <mrostecki@...nsuse.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf] libbpf: Return btf_fd in libbpf__probe_raw_btf

On Wed, May 29, 2019 at 12:53:42PM +0300, Sergei Shtylyov wrote:
> Hello!
> 
> On 29.05.2019 11:29, Michal Rostecki wrote:
> 
> > Function load_sk_storage_btf expects that libbpf__probe_raw_btf is
> > returning a btf descriptor, but before this change it was returning
> > an information about whether the probe was successful (0 or 1).
> > load_sk_storage_btf was using that value as an argument to the close
> > function, which was resulting in closing stdout and thus terminating the
> > process which used that dunction.
> 
>    Function? :-)

Opps! I will fix in v2. Thanks!