netdev - Re: [PATCH] Don't allow multiple TPGs or targets to share a portal

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Date:	Wed, 13 Feb 2013 14:09:01 -0800
From:	Andy Grover <agrover@...hat.com>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
CC:	target-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] Don't allow multiple TPGs or targets to share a portal

On 02/13/2013 12:31 PM, Nicholas A. Bellinger wrote:
> On Fri, 2013-02-08 at 15:05 -0800, Andy Grover wrote:
>> RFC 3720 says "Each Network Portal, as utilized by a given iSCSI Node,
>> belongs to exactly one portal group within that node." therefore
>> iscsit_add_np should not check for existing matching portals, it should
>> just go ahead and try to make the portal, and then kernel_bind() will
>> return the proper error.
>>
>> Signed-off-by: Andy Grover <agrover@...hat.com>
>> ---
>
> NACK.  Your interpretation of RFC-3720 is incorrect.  There is nothing
> that says that a single IP address cannot be shared across multiple
> TargetName+TargetPortalGroupTag endpoints.

A Network Portal is ip:port, not just IP. I'd agree two TPGs can use the 
same IP as long as they listen on different ports.

But that bit I quoted seems pretty clear. How should it be alternatively 
interpreted?

Thanks -- Andy

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