Re: [Xen-devel] question on frontend ethernet

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

The network backend is not seeing your tx->req_prod and rx->req_prod
updates. So, no packets transmitted and all received packets are
dropped.

Are youi sure you sent the right frame numbers in your
interface_connect message? Did you get a subsequenet interface_status
== connected message?

 -- Keir

> I've got what I think should be a working front end ethernet for plan 9. I 
> get the startup messages to set it up ok, but what's not happening is that 
> when I set tx->req_prod to 1, I never see tx->resp_prod go to 1 -- it 
> stays at 0. I am sending the notify_via_evthchn for the ethernet channel 
> to the hypervisor after I sent tx->req_prod to 1.
> 
> Another weird thing I don't get. If I start up dom (e.g.) 1 and then watch 
> vif1.0, I see lots and lots of packets being dropped on it. If I tcpdump 
> that vif, I see the packets for the ssh traffic on it. This is the ssh 
> traffic from the vmware xen machine to my native linux on the laptop (I'm 
> ssh'ed in to the xen machine). 
> 
> OK, I'm obviously doing something wrong, although my code for the front 
> end is a pretty simple port of the linux front end code. Any hints on how 
> I should shoot these troubles? Something to look for? What I'm trying to 
> see is the DHCP request from Plan 9 to DOM0. Plan 9 thinks it has sent it, 
> Xen never seems to think it is there. 
> 
> I trust (sort of) my evtchn and ctrl_if code, since that is working well 
> for console I/O and ethernet interface setup messages. 
> 
> How soon do I need to get the Plan 9 starter to you folks for V2?
> 
> thanks
> 
> ron
> 
> 
> 
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