From mboxrd@z Thu Jan  1 00:00:00 1970
From: Aaron Conole <aconole@redhat.com>
Subject: Re: [PATCH v3 1/2] vhost: Add callback and private data
	for vhost PMD
Date: Mon, 09 Nov 2015 13:16:39 -0500
Message-ID: <f7t1tbzrqbc.fsf@aconole.bos.csb>
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Cc: dev@dpdk.org, ann.zhuangyanying@huawei.com
To: Tetsuya Mukawa <mukawa@igel.co.jp>
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In-Reply-To: <1447046221-20811-2-git-send-email-mukawa@igel.co.jp> (Tetsuya
 Mukawa's message of "Mon, 9 Nov 2015 14:17:00 +0900")
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Greetings,

Tetsuya Mukawa <mukawa@igel.co.jp> writes:
> These variables are needed to be able to manage one of virtio devices
> using both vhost library APIs and vhost PMD.
> For example, if vhost PMD uses current callback handler and private data
> provided by vhost library, A DPDK application that links vhost library
> cannot use some of vhost library APIs. To avoid it, callback and private
> data for vhost PMD are needed.
>
> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
> ---
>  lib/librte_vhost/rte_vhost_version.map        |  6 +++
>  lib/librte_vhost/rte_virtio_net.h             |  3 ++
>  lib/librte_vhost/vhost_user/virtio-net-user.c | 13 +++----
>  lib/librte_vhost/virtio-net.c                 | 56 +++++++++++++++++++++++++--
>  lib/librte_vhost/virtio-net.h                 |  4 +-
>  5 files changed, 70 insertions(+), 12 deletions(-)
>
> diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map
> index 3d8709e..00a9ce5 100644
> --- a/lib/librte_vhost/rte_vhost_version.map
> +++ b/lib/librte_vhost/rte_vhost_version.map
> @@ -20,3 +20,9 @@ DPDK_2.1 {
>  	rte_vhost_driver_unregister;
>  
>  } DPDK_2.0;
> +
> +DPDK_2.2 {
> +	global:
> +
> +	rte_vhost_driver_pmd_callback_register;
> +} DPDK_2.1;
> diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h
> index 5687452..3ef6e58 100644
> --- a/lib/librte_vhost/rte_virtio_net.h
> +++ b/lib/librte_vhost/rte_virtio_net.h
> @@ -128,6 +128,7 @@ struct virtio_net {
>  	char			ifname[IF_NAME_SZ];	/**< Name of the tap device or socket path. */
>  	uint32_t		virt_qp_nb;	/**< number of queue pair we have allocated */
>  	void			*priv;		/**< private context */
> +	void			*pmd_priv;	/**< private context for vhost PMD */
>  	struct vhost_virtqueue	*virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];	/**< Contains all virtqueue information. */
>  } __rte_cache_aligned;

Sorry if I'm missing something, but this is an ABI breaker, isn't it? I
think this needs the RTE_NEXT_ABI tag around it.