[klibc] Request: Infiniband Support in ipconfig

[Wesley Brown]

That's going to be a little tricky, but I'll see what I can do.  Obviously while booting, the system isn't in a real state to be able to capture data, and Infiniband doesn't really do broadcasts like Ethernet, per se.

I may be able to get a capture of Infiniband ARP requests, if that helps?  Or I can run ipconfig on an up and running system.

-Wes


On Aug 1, 2012, at 12:31 PM, "H. Peter Anvin" <hpa at zytor.com> wrote:

> On 07/31/2012 12:26 PM, Wesley Brown wrote:
>> When attempting to boot a system using Infiniband interfaces, ipconfig does not recognize Infiniband NICs as having valid MAC addresses, so they are silently ignored.  As I would like to be able to netboot using Infiniband, I have patched ipconfig to support Infiniband interfaces.
>> 
>> Fortunately, it's a pretty simple and straightforward patch.  Below is the patch for your consideration.
>> 
>> --- usr/kinit/ipconfig/netdev.c	2012-07-31 15:13:12.744747261 -0400
>> +++ usr/kinit/ipconfig/netdev-ib.c	2012-07-31 15:16:26.468087750 -0400
>> @@ -220,6 +220,9 @@
>>  	case ARPHRD_LOOPBACK:
>>  		dev->hwlen = 0;
>>  		break;
>> +        case ARPHRD_INFINIBAND:
>> +                dev->hwlen = 20;
>> +                break;
>>  	default:
>>  		return -1;
>>  	}
>> 
>> As you can see, it simply returns the proper length of the IB interface's MAC address.
>> 
> 
> Any way you could get me a packet capture of your Infiniband boot session?
> 
> 	-hpa
> 
> 
> -- 
> H. Peter Anvin, Intel Open Source Technology Center
> I work for Intel.  I don't speak on their behalf.
>