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From: Jason Gunthorpe <jgg@ziepe.ca>
To: Tom Talpey <tom@talpey.com>
Cc: Mark Zhang <markz@mellanox.com>,
	Alex Rosenbaum <rosenbaumalex@gmail.com>,
	RDMA mailing list <linux-rdma@vger.kernel.org>,
	Eran Ben Elisha <eranbe@mellanox.com>,
	Yishai Hadas <yishaih@mellanox.com>,
	Alex Rosenbaum <alexr@mellanox.com>,
	Maor Gottlieb <maorg@mellanox.com>,
	Leon Romanovsky <leonro@mellanox.com>
Subject: Re: [RFC v2] RoCE v2.0 Entropy - IPv6 Flow Label and UDP Source Port
Date: Wed, 19 Feb 2020 13:55:28 -0400
Message-ID: <20200219175528.GU31668@ziepe.ca> (raw)
In-Reply-To: <a0067ba5-c15b-4194-0de2-3964393e9993@talpey.com>

On Wed, Feb 19, 2020 at 12:41:53PM -0500, Tom Talpey wrote:
> On 2/19/2020 8:06 AM, Jason Gunthorpe wrote:
> > On Wed, Feb 19, 2020 at 02:06:28AM +0000, Mark Zhang wrote:
> > > The symmetry is important when calculate flow_label with DstQPn/SrcQPn
> > > for non-RDMA CM Service ID (check the first mail), so that the server
> > > and client will have same flow_label and udp_sport. But looks like it is
> > > not important in this case.
> > 
> > If the application needs a certain flow label it should not rely on
> > auto-generation, IMHO.
> > 
> > I expect most networks will not be reversible anyhow, even with the
> > same flow label?
> 
> These are network flow labels, not under application control. If they
> are under application control, that's a security issue.

Eh? ipv6 puts them under application control.

Jason

  reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-08 14:26 Alex Rosenbaum
2020-01-15  9:48 ` Mark Zhang
2020-02-06 14:18 ` Tom Talpey
2020-02-06 14:35   ` Jason Gunthorpe
2020-02-06 14:39   ` Alex Rosenbaum
2020-02-06 15:19     ` Tom Talpey
2020-02-08  9:58       ` Alex Rosenbaum
2020-02-12 15:47         ` Tom Talpey
2020-02-13 11:03           ` Alex Rosenbaum
2020-02-13 15:26             ` Tom Talpey
2020-02-13 15:41               ` Jason Gunthorpe
2020-02-14 14:23                 ` Mark Zhang
2020-02-15  6:27                   ` Mark Zhang
2020-02-18 14:16                     ` Tom Talpey
2020-02-18 17:41                       ` Tom Talpey
2020-02-19  1:51                         ` Mark Zhang
2020-02-19  2:01                           ` Tom Talpey
2020-02-19  2:06                             ` Mark Zhang
2020-02-19 13:06                               ` Jason Gunthorpe
2020-02-19 17:41                                 ` Tom Talpey
2020-02-19 17:55                                   ` Jason Gunthorpe [this message]
2020-02-20  1:04                                   ` Mark Zhang
2020-02-21 14:47                                     ` Tom Talpey
2020-02-25 13:20                                       ` Alex Rosenbaum

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