Re: [Xen-devel] Q on netfront/netback driver

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Sun, Jan 31, 2010 at 08:29:04AM -0800, ravi kerur wrote:
> Hello all,
> 
> I am trying to understand when and how netback and netfront drivers gets
> instantiated and does netfront exist in domU's?

I would recommend you look in the source code to understand its
handshake mechanism. Or better yet, pick up the 'Definitive Guide to the
Xen hypervisor".

Netfront will exist in DomU's if it is compiled in or as a module
depending on the distro.
> 
> I do see the drivers available in following directory in dom0 but nothing in
> domU...
> 
>  $ pwd
> /lib/modules/2.6.18-128.1.6.el5.xs5.5.0.496.1012xen/kernel/drivers/xen
> 
> $ ls
> pciback  scsiback  scsifront  sfc_netback  sfc_netfront  sfc_netutil
> tpmback
> 
> However, I do not see the drivers listed when "lsmod" is executed on dom0 or
> domU.

It might be very well compiled in, at which point it is not a module.
Look in your .config file for NETBACK.
> 
> Inputs appreciated.
> 
> Thanks
> -RK

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