netdev - Re: [net PATCH 0/5] sockmap fixes for net

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Date:   Fri, 20 Oct 2017 13:01:46 +0100 (WEST)
From:   David Miller <davem@...emloft.net>
To:     john.r.fastabend@...il.com
Cc:     alexei.starovoitov@...il.com, netdev@...r.kernel.org,
        borkmann@...earbox.net
Subject: Re: [net PATCH 0/5] sockmap fixes for net

From: John Fastabend <john.r.fastabend@...il.com>
Date: Wed, 18 Oct 2017 07:09:48 -0700

> The following implements a set of fixes for sockmap and changes the
> API slightly in a few places to reduce preempt_disable/enable scope.
> We do this here in net because it requires an API change and this
> avoids getting stuck with legacy API going forward.
> 
> The short description:
> 
> Access to skb mark is removed, it is problematic when we add
> features in the future because mark is a union and used by the
> TCP/socket code internally. We don't want to expose this to the
> BPF programs or let programs change the values.
> 
> The other change is caching metadata in the skb itself between
> when the BPF program returns a redirect code and the core code
> implements the redirect. This avoids having per cpu metadata.
> 
> Finally, tighten restriction on using sockmap to CAP_NET_ADMIN and
> only SOCK_STREAM sockets.

Series applied, thanks.