Re: [PATCH v2 1/2] virtio_scsi: Add fc_host definitions

[Michael S. Tsirkin]

On Thu, Jan 26, 2017 at 11:41:08AM +0800, Fam Zheng wrote:
> Signed-off-by: Fam Zheng <famz@xxxxxxxxxx>
> ---

I pefer combining this with implementation,
hard to reason about interface alone.

>  include/uapi/linux/virtio_scsi.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/include/uapi/linux/virtio_scsi.h b/include/uapi/linux/virtio_scsi.h
> index cc18ef8..a26fb31 100644
> --- a/include/uapi/linux/virtio_scsi.h
> +++ b/include/uapi/linux/virtio_scsi.h
> @@ -113,6 +113,11 @@ struct virtio_scsi_config {
>  	__u16 max_channel;
>  	__u16 max_target;
>  	__u32 max_lun;
> +	__u8  primary_wwpn[8];
> +	__u8  primary_wwnn[8];
> +	__u8  secondary_wwpn[8];
> +	__u8  secondary_wwnn[8];
> +	__u8  primary_active;

Is this in fact a binary value?
Also pls add padding to align on 8 byte boundary.

>  } __attribute__((packed));
>  
>  /* Feature Bits */
> @@ -120,6 +125,7 @@ struct virtio_scsi_config {
>  #define VIRTIO_SCSI_F_HOTPLUG                  1
>  #define VIRTIO_SCSI_F_CHANGE                   2
>  #define VIRTIO_SCSI_F_T10_PI                   3
> +#define VIRTIO_SCSI_F_FC_HOST                  4
>  
>  /* Response codes */
>  #define VIRTIO_SCSI_S_OK                       0
> -- 
> 2.9.3