On Oct 19 11:17, Dmitry Fomichev wrote:
> ZNS specification defines two zone conditions for the zones that no
> longer can function properly, possibly because of flash wear or other
> internal fault. It is useful to be able to "inject" a small number of
> such zones for testing purposes.
> 
> This commit defines two optional device properties, "offline_zones"
> and "rdonly_zones". Users can assign non-zero values to these variables
> to specify the number of zones to be initialized as Offline or
> Read-Only. The actual number of injected zones may be smaller than the
> requested amount - Read-Only and Offline counts are expected to be much
> smaller than the total number of zones on a drive.
> 
> Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
> ---
>  hw/block/nvme-ns.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++
>  hw/block/nvme-ns.h |  2 ++
>  2 files changed, 66 insertions(+)
> 
> diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
> index 255ded2b43..d050f97909 100644
> --- a/hw/block/nvme-ns.c
> +++ b/hw/block/nvme-ns.c
> @@ -21,6 +21,7 @@
>  #include "sysemu/sysemu.h"
>  #include "sysemu/block-backend.h"
>  #include "qapi/error.h"
> +#include "crypto/random.h"
>  
>  #include "hw/qdev-properties.h"
>  #include "hw/qdev-core.h"
> @@ -132,6 +133,32 @@ static int nvme_calc_zone_geometry(NvmeNamespace *ns, Error **errp)
>          return -1;
>      }
>  
> +    if (ns->params.zd_extension_size) {
> +        if (ns->params.zd_extension_size & 0x3f) {
> +            error_setg(errp,
> +                "zone descriptor extension size must be a multiple of 64B");
> +            return -1;
> +        }
> +        if ((ns->params.zd_extension_size >> 6) > 0xff) {
> +            error_setg(errp, "zone descriptor extension size is too large");
> +            return -1;
> +        }
> +    }

Looks like this should have been added in the previous patch.