netdev - Re: [PATCH v4 for-next 04/12] IB/ipoib: Return IPoIB devices matching connection parameters

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Message-ID: <CAJ3xEMjN+o=vC4abAeG5EuOo3Y1gSyh1qPDseA_aaYmoLWAunw@mail.gmail.com>
Date:	Thu, 21 May 2015 08:48:59 +0300
From:	Or Gerlitz <gerlitz.or@...il.com>
To:	Haggai Eran <haggaie@...lanox.com>
Cc:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Liran Liss <liranl@...lanox.com>,
	Guy Shapiro <guysh@...lanox.com>,
	Shachar Raindel <raindel@...lanox.com>,
	Yotam Kenneth <yotamke@...lanox.com>
Subject: Re: [PATCH v4 for-next 04/12] IB/ipoib: Return IPoIB devices matching
 connection parameters

On Thu, May 21, 2015 at 8:33 AM, Haggai Eran <haggaie@...lanox.com> wrote:
> On 20/05/2015 02:55, Jason Gunthorpe wrote:
>> On Sun, May 17, 2015 at 08:51:00AM +0300, Haggai Eran wrote:
>>> > From: Guy Shapiro <guysh@...lanox.com>
>>> >
>>> > Implement the get_net_device_by_port_pkey_ip callback that returns network
>>> > device to ib_core according to connection parameters. Check the ipoib
>>> > device and iterate over all child devices to look for a match.
>> Can you give a run down on how to actually set this up? Like what
>> shell command do you execute?
>
> Sure.
>
> There are two methods to create new child interface for IPoIB.
> For a specific P_Key, write the desired P_Key to the create_child sysfs
> file:
> # echo 0x8000 > /sys/class/net/ib0/create_child
> This creates a new interface ib0.8000 operating with P_Key 0x8000.

0x8000 is practically zero (bits 15-0), right? not sure this is a valid pkey.


> To create a new child interface on the default P_Key, its possible to
> use iproute:
> # ip link add link ib0 name ib0.1 type ipoib

you can use non default pkeys as well here.

$ ip link add link ib0 name ib0.1 type ipoib pkey 0x8001
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