Re: [Qemu-devel] [RFC 2/5] virtio: add child alias properties for virtio-blk

[Peter Crosthwaite <peter.crosthwaite@xilinx.com>]

On Wed, Mar 19, 2014 at 3:48 PM, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> Now that qdev child alias properties exist, define aliases for
> virtio-blk properties.  The aliases will replace the duplicated
> properties that current live in virtio-blk-pci, virtio-blk-ccw, and
> friends.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  include/hw/block/block.h       | 14 ++++++++++++++
>  include/hw/virtio/virtio-blk.h | 17 +++++++++++++++++
>  2 files changed, 31 insertions(+)
>
> diff --git a/include/hw/block/block.h b/include/hw/block/block.h
> index 7c3d6c8..702f1eb 100644
> --- a/include/hw/block/block.h
> +++ b/include/hw/block/block.h
> @@ -52,11 +52,25 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
>      DEFINE_PROP_UINT32("discard_granularity", _state, \
>                         _conf.discard_granularity, -1)
>
> +#define DEFINE_BLOCK_CHILD_ALIASES(_state, _field)                      \
> +    DEFINE_PROP_CHILD_ALIAS("drive", _state, _field),                   \
> +    DEFINE_PROP_CHILD_ALIAS("logical_block_size", _state, _field),      \
> +    DEFINE_PROP_CHILD_ALIAS("physical_block_size", _state, _field),     \
> +    DEFINE_PROP_CHILD_ALIAS("min_io_size", _state, _field),             \
> +    DEFINE_PROP_CHILD_ALIAS("opt_io_size", _state, _field),             \
> +    DEFINE_PROP_CHILD_ALIAS("bootindex", _state, _field),               \
> +    DEFINE_PROP_CHILD_ALIAS("discard_granularity", _state, _field)
> +
>  #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)      \
>      DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),  \
>      DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \
>      DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
>
> +#define DEFINE_BLOCK_CHS_CHILD_ALIASES(_state, _field)      \
> +    DEFINE_PROP_CHILD_ALIAS("cyls", _state, _field),        \
> +    DEFINE_PROP_CHILD_ALIAS("heads", _state, _field),       \
> +    DEFINE_PROP_CHILD_ALIAS("secs", _state, _field)
> +
>  /* Configuration helpers */
>
>  void blkconf_serial(BlockConf *conf, char **serial);
> diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
> index e4c41ff..5095ff4 100644
> --- a/include/hw/virtio/virtio-blk.h
> +++ b/include/hw/virtio/virtio-blk.h
> @@ -153,6 +153,23 @@ typedef struct VirtIOBlock {
>          DEFINE_PROP_IOTHREAD("x-iothread", _state, _field.iothread)
>  #endif /* __linux__ */
>
> +#ifdef __linux__
> +#define DEFINE_VIRTIO_BLK_CHILD_ALIASES(_state, _field)                       \
> +        DEFINE_BLOCK_CHILD_ALIASES(_state, _field),                           \
> +        DEFINE_BLOCK_CHS_CHILD_ALIASES(_state, _field),                       \
> +        DEFINE_PROP_CHILD_ALIAS("serial", _state, _field),                    \
> +        DEFINE_PROP_CHILD_ALIAS("config-wce", _state, _field),                \
> +        DEFINE_PROP_CHILD_ALIAS("scsi", _state, _field),                      \
> +        DEFINE_PROP_CHILD_ALIAS("x-iothread", _state, _field)
> +#else
> +#define DEFINE_VIRTIO_BLK_CHILD_ALIASES(_state, _field)                       \
> +        DEFINE_BLOCK_CHILD_ALIASES(_state, _field),                           \
> +        DEFINE_BLOCK_CHS_CHILD_ALIASES(_state, _field),                       \
> +        DEFINE_PROP_CHILD_ALIAS("serial", _state, _field),                    \
> +        DEFINE_PROP_CHILD_ALIAS("config-wce", _state, _field),                \
> +        DEFINE_PROP_CHILD_ALIAS("x-iothread", _state, _field)
> +#endif /* __linux__ */

Can the duplication be avoided with:

#ifdef __linux__
#define DEFINE_VIRTIO_BLK_CHILD_ALIASES_LINUX \
        DEFINE_PROP_CHILD_ALIAS("scsi", _state, _field),
#else
#define DEFINE_VIRTIO_BLK_CHILD_ALIASES_LINUX
#endif

?

Regards,
Peter


> +
>  void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk);
>
>  #endif
> --
> 1.8.5.3
>
>