netdev - Re: net/smc and the RDMA core

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Message-ID: <20170511165659.GB20043@lst.de>
Date:   Thu, 11 May 2017 18:56:59 +0200
From:   "hch@....de" <hch@....de>
To:     Ursula Braun <ubraun@...ux.vnet.ibm.com>
Cc:     "hch@....de" <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
        Bart Van Assche <Bart.VanAssche@...disk.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>
Subject: Re: net/smc and the RDMA core

On Thu, May 11, 2017 at 06:50:04PM +0200, Ursula Braun wrote:
> Please consider the following patch to make users aware of the
> security implications through existing mechanisms.

Any such patch would be in addition to the BROKEN marker until
there is an actual alternative.

> +		rmb_desc->mr_rx[SMC_SINGLE_LINK] =
> +			lgr->lnk[SMC_SINGLE_LINK].roce_pd->__internal_mr;

And it's named __internal_mr for reason.  The right interface to use
the unsafe rkey is to use pd->unsafe_global_rkey.