LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Jiri Olsa <jolsa@redhat.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	lkml <linux-kernel@vger.kernel.org>,
	netdev@vger.kernel.org,
	Quentin Monnet <quentin.monnet@netronome.com>
Subject: Re: [PATCH 0/3] bpf: Store/dump license string for loaded program
Date: Wed, 25 Apr 2018 18:20:48 +0200	[thread overview]
Message-ID: <20180425162048.GG3396@krava> (raw)
In-Reply-To: <20180425161527.w7xgpg75npdx2zmb@ast-mbp>

On Wed, Apr 25, 2018 at 10:15:29AM -0600, Alexei Starovoitov wrote:
> On Wed, Apr 25, 2018 at 12:17:13PM +0200, Jiri Olsa wrote:
> > On Mon, Apr 23, 2018 at 02:11:36PM -0600, Alexei Starovoitov wrote:
> > > On Mon, Apr 23, 2018 at 08:59:24AM +0200, Jiri Olsa wrote:
> > > > hi,
> > > > sending the change to store and dump the license
> > > > info for loaded BPF programs. It's important for
> > > > us get the license info, when investigating on
> > > > screwed up machine.
> > > 
> > > hmm. boolean flag whether bpf prog is gpl or not
> > > is already exposed via bpf_prog_info.
> > 
> > hum, I can't see that (on bpf-next/master)
> > would the attached change be ok with you?
> > 
> > jirka
> > 
> > 
> > ---
> > diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> > index e6679393b687..2ce9c9d41c2b 100644
> > --- a/include/uapi/linux/bpf.h
> > +++ b/include/uapi/linux/bpf.h
> > @@ -1062,6 +1062,7 @@ struct bpf_prog_info {
> >  	__u32 ifindex;
> >  	__u64 netns_dev;
> >  	__u64 netns_ino;
> > +	__u16 gpl_compatible:1;
> >  } __attribute__((aligned(8)));
> 
> ahh. I swear there were patches to add it and I thought we accepted them.
> Also just noticed that commit 675fc275a3a2d added 4-byte hole in there.
> So I'm thinking we can fill the hole with 
>  	__u32 ifindex;
> +	__u32 gpl_compatible:1;
>  	__u64 netns_dev;
>  	__u64 netns_ino;
> 
> and keep adding bit fields in there without breaking user space.
> Such patch would need to go to bpf tree.
> 

ok, will post v2 with that

thanks,
jirka

      reply	other threads:[~2018-04-25 16:23 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-23  6:59 Jiri Olsa
2018-04-23  6:59 ` [PATCH 1/3] bpf: Store " Jiri Olsa
2018-04-23  6:59 ` [PATCH 2/3] tools bpf: Sync bpf.h uapi header Jiri Olsa
2018-04-23  6:59 ` [PATCH 3/3] tools bpftool: Display license in prog show/list Jiri Olsa
2018-04-23 20:11 ` [PATCH 0/3] bpf: Store/dump license string for loaded program Alexei Starovoitov
2018-04-25 10:17   ` Jiri Olsa
2018-04-25 16:15     ` Alexei Starovoitov
2018-04-25 16:20       ` Jiri Olsa [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180425162048.GG3396@krava \
    --to=jolsa@redhat.com \
    --cc=alexei.starovoitov@gmail.com \
    --cc=ast@kernel.org \
    --cc=daniel@iogearbox.net \
    --cc=jolsa@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=quentin.monnet@netronome.com \
    --subject='Re: [PATCH 0/3] bpf: Store/dump license string for loaded program' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).