netmap pipes

[Slawa Olhovchenkov]

On Sat, Jan 03, 2015 at 06:21:39PM +0100, Luigi Rizzo wrote:

> On Sat, Jan 03, 2015 at 08:40:35PM +0400, Slawa Olhovchenkov wrote:
> > Can anybody explain netmap pipes (more then netmap(4))?
> > How use it?
> > How it works?
> > pipes works over existing network adapter in netmap mode?
> > Or indepened (can I create netmap pipe named 'some_strange_name')?
> > What purpose of master and slave?
> 
> think of pipes as regular netmap ports connected back to back,
> (or as two ports on a VALE switch, if you like).
> They are unrelated to network devices (though the name indicates
> how they share memory, but forget that for the time being);
> are created using the "strange names" like valeX:Y{0 and valeX:Y}0
> (which I realize are not yet in the manpage, sorry);

can I use names other then valeX:Y? for example 'inside0'?

> and you have master and slave because need to name both endpoints.

I create pipe with many slaves (NIOCREGIF with nr_arg1=16, for
example), how I can use this? Writing to master replicated to all
slaves? Writing to any slaves reading from master? Or unidirected?