netdev - Re: [PATCH v2 04/13] Connection Manager

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Message-ID: <20061205163008.GA30211@2ka.mipt.ru>
Date:	Tue, 5 Dec 2006 19:31:33 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Steve Wise <swise@...ngridcomputing.com>
Cc:	Roland Dreier <rdreier@...co.com>, netdev@...r.kernel.org,
	openib-general@...nib.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH  v2 04/13] Connection Manager

On Tue, Dec 05, 2006 at 10:12:42AM -0600, Steve Wise (swise@...ngridcomputing.com) wrote:
> Ah.  Data from an offloaded connection cannot leak into the main stack
> nor vice-verse.  We can take an active RDMA connection establishment as
> an example if you want:  Once the message is sent to the HW to "setup a
> TCP connection from addr/port a.b to addr/port c.d", then packets on
> that connection (that 4-tuple) will always be delivered to the RDMA
> driver, not the native stack.  If the the packet received after the
> connection is setup is -not- an MPA reply (in this example), then the
> connection is aborted.  Once the connection is aborted.  So no leaking
> can happen.
 
And if there were a dataflow between addr/port a.b to addr/port c.d
already, it will either terminated?

Considering the following sequence:
handlers->t3c_handlers->sched()->work_queue->work_handlers()->for
example CPL_PASS_ACCEPT_REQ->pass_accept_req() - it just parses incoming
skb and sets port/addr/route and other fields to be used as a base for rdma
connection. What if it just a usual network packet from kernelspace or 
userspace with the same payload as should be sent by remote rdma system?

-- 
	Evgeniy Polyakov
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