netdev - Re: [PATCH bpf-next v3 0/7] Implement queue/stack maps

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Message-ID: <20181019203047.lidhetlby7qbpywf@ast-mbp.dhcp.thefacebook.com>
Date:   Fri, 19 Oct 2018 13:30:49 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Mauricio Vasquez B <mauricio.vasquez@...ito.it>,
        Alexei Starovoitov <ast@...nel.org>, netdev@...r.kernel.org,
        Song Liu <liu.song.a23@...il.com>
Subject: Re: [PATCH bpf-next v3 0/7] Implement queue/stack maps

On Fri, Oct 19, 2018 at 10:08:08PM +0200, Daniel Borkmann wrote:
> On 10/18/2018 03:16 PM, Mauricio Vasquez B wrote:
> > In some applications this is needed have a pool of free elements, for
> > example the list of free L4 ports in a SNAT.  None of the current maps allow
> > to do it as it is not possible to get any element without having they key
> > it is associated to, even if it were possible, the lack of locking mecanishms in
> > eBPF would do it almost impossible to be implemented without data races.
> > 
> > This patchset implements two new kind of eBPF maps: queue and stack.
> > Those maps provide to eBPF programs the peek, push and pop operations, and for
> > userspace applications a new bpf_map_lookup_and_delete_elem() is added.
> > 
> > Signed-off-by: Mauricio Vasquez B <mauricio.vasquez@...ito.it>
> Acked-by: Daniel Borkmann <daniel@...earbox.net>

Applied, Thanks