Re: [PATCH 00/18] xfrm: Add compat layer

From: Florian Westphal
Date: Fri Jul 27 2018 - 10:20:16 EST

Dmitry Safonov <dima@xxxxxxxxxx> wrote:
> 1. It will double copy netlink messages, making it O(n) instead of
> O(1), where n - is number of bind()s.. Probably we don't care much.

About those bind() patches, I don't understand why they are needed.

Why can't you just add the compat skb to the native skb when doing
the multicast call?

skb_shinfo(skb)->frag_list = compat_skb;
xfrm_nlmsg_multicast(net, skb, 0, ...