Re: Current state of the UNIX backend

[Vincent Bernardoff <vb@xxxxxxxxxxxxxx>]

On 25/05/2013 14:16, Anil Madhavapeddy wrote:
> On 24 May 2013, at 19:23, Vincent Bernardoff <vb@xxxxxxxxxxxxxx> wrote:
>
> > Hi all,
> >
> > Apparently, the current state of mirage for UNIX-direct is broken for me.
> >
> > Could you test it for me, Mac users:
> >
> > cd mirage-skeleton/basic
> > mirari configure --unix
> > mirari build --unix
> > sudo ./mir-hello

So, thanks to Anil we now have a fixed version of tuntap for Mac (for 
some reason, the code was already working on Linux).
The next problem I have is with the new backend on Mac (please test for 
those who can):
* Use my repo (git://github.com/vbmithr/, mirage-platform, mirage-net 
and mirari pinned to branch new-unix-backend2). Pin those packages and 
install them.
* go to mirage-skeleton/basic
* mirari configure --unix
* Edit the generated file backend.ml to add a Tuntap.set_ipv4… line in 
order to assign an IPv4 on the host side for the unikernel (mandatory on 
mac).
* mirari run --unix

You will notice that the unikernel will block (Just after Manager: plug 
tap0).
Debugging with printf, I was able to spot that the problem seems to be 
that in mirage-net/ Ethif.create, the listen function never returns, and 
the code blocks here.
It happens only on Mac, so I am a bit confused here. The usage of dtruss 
did not help me much :(
So Anil or anybody else, if you could have a look at that and understand 
the problem it would be awesome, and it would enable me to merge the new 
unix backend, that makes IP configuration on the interface much more 
flexible.
Cheers,

Vincent