linux-kernel - Re: [PATCH v2 0/3] block: sed-opal: add support for shadow MBR done flag and write

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Date:   Tue, 25 Jun 2019 20:47:26 +0000
From:   "Derrick, Jonathan" <jonathan.derrick@...el.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "zub@...ux.fjfi.cvut.cz" <zub@...ux.fjfi.cvut.cz>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "sbauer@...donthack.me" <sbauer@...donthack.me>,
        "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "jonas.rabenstein@...dium.uni-erlangen.de" 
        <jonas.rabenstein@...dium.uni-erlangen.de>
Subject: Re: [PATCH v2 0/3] block: sed-opal: add support for shadow MBR done
 flag and write

These are still good with me and we'll likely have a similar future use
for passing data through the ioctl.

Could we get this staged for 5.3?

On Tue, 2019-05-21 at 22:46 +0200, David Kozub wrote:
> This patch series extends SED Opal support: it adds IOCTL for setting the shadow
> MBR done flag which can be useful for unlocking an Opal disk on boot and it adds
> IOCTL for writing to the shadow MBR.
> 
> This applies on current master.
> 
> I successfully tested toggling the MBR done flag and writing the shadow MBR
> using some tools I hacked together[1] with a Samsung SSD 850 EVO drive.
> 
> Changes from v1:
> * PATCH 2/3: remove check with access_ok, just rely on copy_from_user as
> suggested in [2] (I tested passing data == 0 and I got the expected EFAULT)
> 
> [1] https://gitlab.com/zub2/opalctl
> [2] https://lore.kernel.org/lkml/20190501134833.GB24132@infradead.org/
> 
> Jonas Rabenstein (3):
>   block: sed-opal: add ioctl for done-mark of shadow mbr
>   block: sed-opal: ioctl for writing to shadow mbr
>   block: sed-opal: check size of shadow mbr
> 
>  block/opal_proto.h            |  16 ++++
>  block/sed-opal.c              | 157 +++++++++++++++++++++++++++++++++-
>  include/linux/sed-opal.h      |   2 +
>  include/uapi/linux/sed-opal.h |  20 +++++
>  4 files changed, 193 insertions(+), 2 deletions(-)
> 

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