[PATCH 1/3] nvmet: allow user to set the ns readonly

[Christoph Hellwig]

On Wed, Sep 30, 2020 at 07:44:25PM -0700, Chaitanya Kulkarni wrote:
> From: "Mark Ruijter" <mruijter at primelogic.nl>
> 
> User may want to export readonly ns to host in order to export
> read-only snapshots. Right now we don't have configfs attribute to
> allow user to mark readonly & export ns.
> 
> Add a configfs attribute such that user can set the ns and export ns
> readonly when it is not enabled.

I thin kwe also need to expose this as permantently write protected
throught the write protection feature on the get side, and ensure
a set features can't change the setting.