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? Thanks, Stefano