lkml.org 
[lkml]   [2018]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 08/11] block: sed-opal: ioctl for writing to shadow mbr
On Tue, Mar 20, 2018 at 10:36:04AM +0100, Jonas Rabenstein wrote:
> On Mon, Mar 19, 2018 at 08:52:24PM +0100, Christoph Hellwig wrote:
> > On Mon, Mar 19, 2018 at 07:36:50PM +0100, Jonas Rabenstein wrote:
> > > Allow modification of the shadow mbr. If the shadow mbr is not marked as
> > > done, this data will be presented read only as the device content. Only
> > > after marking the shadow mbr as done and unlocking a locking range the
> > > actual content is accessible.
> >
> > I hate doing this as an ioctls. Can we make this a sysfs binary file
> > so that people can use dd or cat to write the shadow mbr?
> I already thought about providing a sysfs interface for all that instead
> of using ioctls. But as I am pretty new to kernel programming I do not
> have all the required insight. Especially, as writing the mbr requires
> the sed-opal password I am unsure how a clean sysfs interface to provide
> the password together with a simple dd would look like.
> Moreover I already have a patch that changes the 'void *data' argument
> to setup_opal_dev to a kobject pointer. As far as I know, this is the
> first step to get into the sysfs hierarchy. But as I do not have access
> to an NVMe drive and have no idea about its implementation, this change
> works only for the scsi side.

Post what you have as an RFC (review for comment) and I will test for the NVMe
side, and or start a port for NVMe. It doesn't have to be perfect since you're
sending it out as RFC. It's just a base for us to test/look at to see if we
still like the sysfs way.



\
 
 \ /
  Last update: 2018-03-20 23:35    [W:0.183 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site