Re: [dpdk-dev] [dpdk-stable] [PATCH] vhost: fix features definition location

["Xia, Chenbo" <chenbo.xia@intel.com>]

> -----Original Message-----
> From: stable <stable-bounces@dpdk.org> On Behalf Of Matan Azrad
> Sent: Friday, June 19, 2020 3:08 AM
> To: Maxime Coquelin <maxime.coquelin@redhat.com>
> Cc: dev@dpdk.org; stable@dpdk.org
> Subject: [dpdk-stable] [PATCH] vhost: fix features definition location
> 
> The vhost library provide an infrastructure in order to help the DPDK users to
> manage vhost devices.
> 
> One of the infrastructure parts is the features enablement APIs.
> 
> Some features bits may be defined only in the internal file vhost.h in case the
> kernel version doesn't include them.
> 
> Hence, user running on old kernel may not be able to manage thus features.
> 
> Move all the feature bits definitions to the API file rte_vhost.h.
> 
> Fixes: db69be54b6ff ("vhost: hide internal code")
> Fixes: 8d286dbeb8d7 ("vhost: fix multiple queue not enabled for old kernels")
> Fixes: 3d3c6590b58c ("vhost: enable virtio MTU feature")
> Fixes: 704098fc478c ("vhost: fix build with old kernels")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@mellanox.com>
> ---
>  lib/librte_vhost/rte_vhost.h | 17 +++++++++++++++++
>  lib/librte_vhost/vhost.h     | 17 -----------------
>  2 files changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h index
> d43669f..329ed8a 100644
> --- a/lib/librte_vhost/rte_vhost.h
> +++ b/lib/librte_vhost/rte_vhost.h
> @@ -36,6 +36,23 @@
>  /* support only linear buffers (no chained mbufs) */
>  #define RTE_VHOST_USER_LINEARBUF_SUPPORT	(1ULL << 6)
> 
> +/* Features. */
> +#ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
> + #define VIRTIO_NET_F_GUEST_ANNOUNCE 21 #endif
> +
> +#ifndef VIRTIO_NET_F_MQ
> + #define VIRTIO_NET_F_MQ		22
> +#endif
> +
> +#ifndef VIRTIO_NET_F_MTU
> + #define VIRTIO_NET_F_MTU 3
> +#endif
> +
> +#ifndef VIRTIO_F_ANY_LAYOUT
> + #define VIRTIO_F_ANY_LAYOUT		27
> +#endif
> +
>  /** Protocol features. */
>  #ifndef VHOST_USER_PROTOCOL_F_MQ
>  #define VHOST_USER_PROTOCOL_F_MQ	0
> diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index
> df98d15..17f1e9a 100644
> --- a/lib/librte_vhost/vhost.h
> +++ b/lib/librte_vhost/vhost.h
> @@ -202,26 +202,9 @@ struct vhost_virtqueue {
>  	TAILQ_HEAD(, vhost_iotlb_entry) iotlb_pending_list;  }
> __rte_cache_aligned;
> 
> -/* Old kernels have no such macros defined */ -#ifndef
> VIRTIO_NET_F_GUEST_ANNOUNCE
> - #define VIRTIO_NET_F_GUEST_ANNOUNCE 21 -#endif
> -
> -#ifndef VIRTIO_NET_F_MQ
> - #define VIRTIO_NET_F_MQ		22
> -#endif
> -
>  #define VHOST_MAX_VRING			0x100
>  #define VHOST_MAX_QUEUE_PAIRS		0x80
> 
> -#ifndef VIRTIO_NET_F_MTU
> - #define VIRTIO_NET_F_MTU 3
> -#endif
> -
> -#ifndef VIRTIO_F_ANY_LAYOUT
> - #define VIRTIO_F_ANY_LAYOUT		27
> -#endif
> -
>  /* Declare IOMMU related bits for older kernels */  #ifndef
> VIRTIO_F_IOMMU_PLATFORM
> 
> --
> 1.8.3.1

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>