Re: [PATCH net-next 0/9] DSA changes for multiple CPU ports (part 4)

[Vladimir Oltean]

On Tue, Aug 30, 2022 at 10:59:23PM +0300, Vladimir Oltean wrote:
> This series represents the final part of that effort. We have:
> 
> - the introduction of new UAPI in the form of IFLA_DSA_MASTER

Call for opinions: when I resend this, should I keep rtnl_link_ops,
or should I do what Marek attempted to do, and make the existing iflink
between a user port and its master writable from user space?
https://lore.kernel.org/netdev/20190824024251.4542-4-marek.behun@xxxxxx/

I'm not sure if we have that many more use cases for rtnl_link_ops..
at some point I was thinking we could change the way in which dsa_loop
probes, and allow dynamic creation of such interfaces using RTM_NEWLINK;
but looking closer at that, it's a bit more complicated, since we'd need
to attach dsa_loop user ports to a virtual switch, and probe all ports
at the same time rather than one by one.