On Fri, 2019-09-06 at 10:11 +0200, Stefano Garzarella wrote:
> On Wed, Sep 04, 2019 at 05:00:57PM -0400, Dmitry Fomichev wrote:
> > This commit adds Zoned Device Model (as defined in T10 ZBC and
> > T13 ZAC standards) as a block driver property, along with some
> > useful access functions.
> >
> > A new backend driver permission, BLK_PERM_SUPPORT_HM_ZONED, is also
> > introduced. Only the drivers having this permission will be allowed
> > to open host managed zoned block devices.
> >
> > No code is added yet to initialize or check the value of this new
> > property, therefore this commit doesn't change any functionality.
> >
> > Signed-off-by: Dmitry Fomichev <dmitry.fomic...@wdc.com>
> > ---
> > block.c | 15 +++++++++++++++
> > include/block/block.h | 19 ++++++++++++++++++-
> > include/block/block_int.h | 3 +++
> > 3 files changed, 36 insertions(+), 1 deletion(-)
> >
> > diff --git a/block.c b/block.c
> > index 874a29a983..69f565e1e9 100644
> > --- a/block.c
> > +++ b/block.c
> > @@ -4679,6 +4679,21 @@ void bdrv_get_geometry(BlockDriverState *bs,
> > uint64_t *nb_sectors_ptr)
> > *nb_sectors_ptr = nb_sectors < 0 ? 0 : nb_sectors;
> > }
> >
> > +BdrvZonedModel bdrv_get_zoned_model(BlockDriverState *bs)
> > +{
> > + return bs->bl.zoned_model;
> > +}
> > +
> > +bool bdrv_is_hm_zoned(BlockDriverState *bs)
> > +{
> > + /*
> > + * Host Aware zone devices are supposed to be able to work
> > + * just like regular block devices. Thus, we only consider
> > + * Host Managed devices to be zoned here.
> > + */
> > + return bdrv_get_zoned_model(bs) == BDRV_ZONED_MODEL_HM;
> > +}
> > +
> > bool bdrv_is_sg(BlockDriverState *bs)
> > {
> > return bs->sg;
> > diff --git a/include/block/block.h b/include/block/block.h
> > index 124ad40809..28d065ed80 100644
> > --- a/include/block/block.h
> > +++ b/include/block/block.h
> > @@ -271,18 +271,33 @@ enum {
> > */
> > BLK_PERM_GRAPH_MOD = 0x10,
> >
> > + /**
> > + * This permission is required to open host-managed zoned block
> > devices.
> > + */
> > + BLK_PERM_SUPPORT_HM_ZONED = 0x20,
> > +
> > BLK_PERM_ALL = 0x1f,
>
> Should we update BLK_PERM_ALL to 0x3f?
>
Stefano, good catch! Will update and resend...
> Thanks,
> Stefano
>
