diff mbox series

[v8,03/13] vhost: add vhost msg support for get/set config

Message ID	1652876035-70513-4-git-send-email-andy.pei@intel.com (mailing list archive)
State	Superseded, archived
Delegated to:	Maxime Coquelin
Headers	From: Andy Pei <andy.pei@intel.com> To: dev@dpdk.org Cc: chenbo.xia@intel.com, maxime.coquelin@redhat.com, gang.cao@intel.com, changpeng.liu@intel.com, rosen.xu@intel.com, qimaix.xiao@intel.com Subject: [PATCH v8 03/13] vhost: add vhost msg support for get/set config Date: Wed, 18 May 2022 20:13:45 +0800 Message-Id: <1652876035-70513-4-git-send-email-andy.pei@intel.com> In-Reply-To: <1652876035-70513-1-git-send-email-andy.pei@intel.com> References: <1643093258-47258-2-git-send-email-andy.pei@intel.com> <1652876035-70513-1-git-send-email-andy.pei@intel.com> Precedence: list Errors-To: dev-bounces@dpdk.org
Series	add virtio_blk device support to vdpa/ifc \| [v8,00/13] add virtio_blk device support to vdpa/ifc [v8,01/13] vdpa/ifc: add support for virtio blk device [v8,02/13] vhost: add vDPA ops for blk device [v8,03/13] vhost: add vhost msg support for get/set config [v8,04/13] vdpa/ifc: add blk ops for ifc device [v8,05/13] vdpa/ifc: add vDPA interrupt relay for blk device [v8,06/13] vdpa/ifc: add block device SW live-migration [v8,07/13] vhost: add API to get vDPA device type [v8,08/13] vdpa/ifc: add get device type ops to ifc driver [v8,09/13] examples/vdpa: add add virtio blk support [v8,10/13] usertools: add support for virtio blk device [v8,11/13] vdpa/ifc: add log for config space of virtio blk [v8,12/13] vdpa/ifc: add interrupt handling for config space [v8,13/13] vdpa/ifc/base: access correct register for blk device

Checks

Context	Check	Description
ci/checkpatch	success	coding style OK

Commit Message

Pei, Andy May 18, 2022, 12:13 p.m. UTC

  Add support for VHOST_USER_GET_CONFIG and VHOST_USER_SET_CONFIG.
VHOST_USER_GET_CONFIG and VHOST_USER_SET_CONFIG message is only
supported by virtio blk VDPA device.

Signed-off-by: Andy Pei <andy.pei@intel.com>
---
 lib/vhost/vhost_user.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/vhost/vhost_user.h | 13 +++++++++
 2 files changed, 86 insertions(+)

Comments

Chenbo Xia May 23, 2022, 3:54 a.m. UTC | #1

> -----Original Message-----
> From: Pei, Andy <andy.pei@intel.com>
> Sent: Wednesday, May 18, 2022 8:14 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo.xia@intel.com>; maxime.coquelin@redhat.com; Cao,
> Gang <gang.cao@intel.com>; Liu, Changpeng <changpeng.liu@intel.com>; Xu,
> Rosen <rosen.xu@intel.com>; Xiao, QimaiX <qimaix.xiao@intel.com>
> Subject: [PATCH v8 03/13] vhost: add vhost msg support for get/set config
> 
> Add support for VHOST_USER_GET_CONFIG and VHOST_USER_SET_CONFIG.
> VHOST_USER_GET_CONFIG and VHOST_USER_SET_CONFIG message is only
> supported by virtio blk VDPA device.
> 
> Signed-off-by: Andy Pei <andy.pei@intel.com>
> ---
>  lib/vhost/vhost_user.c | 73
> ++++++++++++++++++++++++++++++++++++++++++++++++++
>  lib/vhost/vhost_user.h | 13 +++++++++
>  2 files changed, 86 insertions(+)
> 
> diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
> index 850848c..1dd1e25f 100644
> --- a/lib/vhost/vhost_user.c
> +++ b/lib/vhost/vhost_user.c
> @@ -2468,6 +2468,77 @@ static int is_vring_iotlb(struct virtio_net *dev,
>  }
> 
>  static int
> +vhost_user_get_config(struct virtio_net **pdev,
> +			struct vhu_msg_context *ctx,
> +			int main_fd __rte_unused)
> +{
> +	struct virtio_net *dev = *pdev;
> +	struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
> +	int ret = 0;
> +
> +	if (validate_msg_fds(dev, ctx, 0) != 0)
> +		return RTE_VHOST_MSG_RESULT_ERR;
> +
> +	if (vdpa_dev->ops->get_config) {
> +		ret = vdpa_dev->ops->get_config(dev->vid,
> +					   ctx->msg.payload.cfg.region,
> +					   ctx->msg.payload.cfg.size);
> +		if (ret != 0) {
> +			ctx->msg.size = 0;
> +			VHOST_LOG_CONFIG(ERR,
> +					 "(%s) get_config() return error!\n",
> +					 dev->ifname);
> +		}
> +	} else {
> +		VHOST_LOG_CONFIG(ERR, "(%s) get_config() not supported!\n",
> +				 dev->ifname);
> +	}
> +
> +	return RTE_VHOST_MSG_RESULT_REPLY;
> +}
> +
> +static int
> +vhost_user_set_config(struct virtio_net **pdev,
> +			struct vhu_msg_context *ctx,
> +			int main_fd __rte_unused)
> +{
> +	struct virtio_net *dev = *pdev;
> +	struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
> +	int ret = 0;
> +
> +	if (validate_msg_fds(dev, ctx, 0) != 0)
> +		return RTE_VHOST_MSG_RESULT_ERR;
> +
> +	if (ctx->msg.payload.cfg.size > VHOST_USER_MAX_CONFIG_SIZE) {
> +		VHOST_LOG_CONFIG(ERR,
> +			"(%s) vhost_user_config size: %"PRIu32", should not be
> larger than %d\n",
> +			dev->ifname, ctx->msg.payload.cfg.size,
> +			VHOST_USER_MAX_CONFIG_SIZE);
> +		goto out;
> +	}
> +
> +	if (vdpa_dev->ops->set_config) {
> +		ret = vdpa_dev->ops->set_config(dev->vid,
> +			ctx->msg.payload.cfg.region,
> +			ctx->msg.payload.cfg.offset,
> +			ctx->msg.payload.cfg.size,
> +			ctx->msg.payload.cfg.flags);
> +		if (ret)
> +			VHOST_LOG_CONFIG(ERR,
> +					 "(%s) set_config() return error!\n",
> +					 dev->ifname);
> +	} else {
> +		VHOST_LOG_CONFIG(ERR, "(%s) set_config() not supported!\n",
> +				 dev->ifname);
> +	}
> +
> +	return RTE_VHOST_MSG_RESULT_OK;
> +
> +out:
> +	return RTE_VHOST_MSG_RESULT_ERR;
> +}

I missed one thing in previous reviews: vdpa_dev pointer needed to be checked (Not Null)
in both set/get config.

Thanks,
Chenbo

> +
> +static int
>  vhost_user_iotlb_msg(struct virtio_net **pdev,
>  			struct vhu_msg_context *ctx,
>  			int main_fd __rte_unused)
> @@ -2686,6 +2757,8 @@ static int is_vring_iotlb(struct virtio_net *dev,
>  VHOST_MESSAGE_HANDLER(VHOST_USER_NET_SET_MTU, vhost_user_net_set_mtu,
> false) \
>  VHOST_MESSAGE_HANDLER(VHOST_USER_SET_SLAVE_REQ_FD, vhost_user_set_req_fd,
> true) \
>  VHOST_MESSAGE_HANDLER(VHOST_USER_IOTLB_MSG, vhost_user_iotlb_msg, false)
> \
> +VHOST_MESSAGE_HANDLER(VHOST_USER_GET_CONFIG, vhost_user_get_config, false)
> \
> +VHOST_MESSAGE_HANDLER(VHOST_USER_SET_CONFIG, vhost_user_set_config, false)
> \
>  VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_ADVISE,
> vhost_user_set_postcopy_advise, false) \
>  VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_LISTEN,
> vhost_user_set_postcopy_listen, false) \
>  VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_END, vhost_user_postcopy_end,
> false) \
> diff --git a/lib/vhost/vhost_user.h b/lib/vhost/vhost_user.h
> index ba1c5c7..c4d091e 100644
> --- a/lib/vhost/vhost_user.h
> +++ b/lib/vhost/vhost_user.h
> @@ -50,6 +50,8 @@
>  	VHOST_USER_NET_SET_MTU = 20,
>  	VHOST_USER_SET_SLAVE_REQ_FD = 21,
>  	VHOST_USER_IOTLB_MSG = 22,
> +	VHOST_USER_GET_CONFIG = 24,
> +	VHOST_USER_SET_CONFIG = 25,
>  	VHOST_USER_CRYPTO_CREATE_SESS = 26,
>  	VHOST_USER_CRYPTO_CLOSE_SESS = 27,
>  	VHOST_USER_POSTCOPY_ADVISE = 28,
> @@ -123,6 +125,16 @@
>  	uint16_t queue_size;
>  } VhostUserInflight;
> 
> +#define VHOST_USER_MAX_CONFIG_SIZE		256
> +
> +/** Get/set config msg payload */
> +struct vhost_user_config {
> +	uint32_t offset;
> +	uint32_t size;
> +	uint32_t flags;
> +	uint8_t region[VHOST_USER_MAX_CONFIG_SIZE];
> +};
> +
>  typedef struct VhostUserMsg {
>  	union {
>  		uint32_t master; /* a VhostUserRequest value */
> @@ -146,6 +158,7 @@
>  		VhostUserCryptoSessionParam crypto_session;
>  		VhostUserVringArea area;
>  		VhostUserInflight inflight;
> +		struct vhost_user_config cfg;
>  	} payload;
>  	/* Nothing should be added after the payload */
>  } __rte_packed VhostUserMsg;
> --
> 1.8.3.1

Pei, Andy May 23, 2022, 4:49 a.m. UTC | #2

Hi  Chenbo,

Thanks for your reply.
I will check it in next  version patch.

> -----Original Message-----
> From: Xia, Chenbo <chenbo.xia@intel.com>
> Sent: Monday, May 23, 2022 11:55 AM
> To: Pei, Andy <andy.pei@intel.com>; dev@dpdk.org
> Cc: maxime.coquelin@redhat.com; Cao, Gang <gang.cao@intel.com>; Liu,
> Changpeng <changpeng.liu@intel.com>; Xu, Rosen <rosen.xu@intel.com>;
> Xiao, QimaiX <qimaix.xiao@intel.com>
> Subject: RE: [PATCH v8 03/13] vhost: add vhost msg support for get/set
> config
> 
> > -----Original Message-----
> > From: Pei, Andy <andy.pei@intel.com>
> > Sent: Wednesday, May 18, 2022 8:14 PM
> > To: dev@dpdk.org
> > Cc: Xia, Chenbo <chenbo.xia@intel.com>; maxime.coquelin@redhat.com;
> > Cao, Gang <gang.cao@intel.com>; Liu, Changpeng
> > <changpeng.liu@intel.com>; Xu, Rosen <rosen.xu@intel.com>; Xiao,
> > QimaiX <qimaix.xiao@intel.com>
> > Subject: [PATCH v8 03/13] vhost: add vhost msg support for get/set
> > config
> >
> > Add support for VHOST_USER_GET_CONFIG and
> VHOST_USER_SET_CONFIG.
> > VHOST_USER_GET_CONFIG and VHOST_USER_SET_CONFIG message is only
> > supported by virtio blk VDPA device.
> >
> > Signed-off-by: Andy Pei <andy.pei@intel.com>
> > ---
> >  lib/vhost/vhost_user.c | 73
> > ++++++++++++++++++++++++++++++++++++++++++++++++++
> >  lib/vhost/vhost_user.h | 13 +++++++++
> >  2 files changed, 86 insertions(+)
> >
> > diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c index
> > 850848c..1dd1e25f 100644
> > --- a/lib/vhost/vhost_user.c
> > +++ b/lib/vhost/vhost_user.c
> > @@ -2468,6 +2468,77 @@ static int is_vring_iotlb(struct virtio_net
> > *dev,  }
> >
> >  static int
> > +vhost_user_get_config(struct virtio_net **pdev,
> > +			struct vhu_msg_context *ctx,
> > +			int main_fd __rte_unused)
> > +{
> > +	struct virtio_net *dev = *pdev;
> > +	struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
> > +	int ret = 0;
> > +
> > +	if (validate_msg_fds(dev, ctx, 0) != 0)
> > +		return RTE_VHOST_MSG_RESULT_ERR;
> > +
> > +	if (vdpa_dev->ops->get_config) {
> > +		ret = vdpa_dev->ops->get_config(dev->vid,
> > +					   ctx->msg.payload.cfg.region,
> > +					   ctx->msg.payload.cfg.size);
> > +		if (ret != 0) {
> > +			ctx->msg.size = 0;
> > +			VHOST_LOG_CONFIG(ERR,
> > +					 "(%s) get_config() return error!\n",
> > +					 dev->ifname);
> > +		}
> > +	} else {
> > +		VHOST_LOG_CONFIG(ERR, "(%s) get_config() not
> supported!\n",
> > +				 dev->ifname);
> > +	}
> > +
> > +	return RTE_VHOST_MSG_RESULT_REPLY;
> > +}
> > +
> > +static int
> > +vhost_user_set_config(struct virtio_net **pdev,
> > +			struct vhu_msg_context *ctx,
> > +			int main_fd __rte_unused)
> > +{
> > +	struct virtio_net *dev = *pdev;
> > +	struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
> > +	int ret = 0;
> > +
> > +	if (validate_msg_fds(dev, ctx, 0) != 0)
> > +		return RTE_VHOST_MSG_RESULT_ERR;
> > +
> > +	if (ctx->msg.payload.cfg.size > VHOST_USER_MAX_CONFIG_SIZE) {
> > +		VHOST_LOG_CONFIG(ERR,
> > +			"(%s) vhost_user_config size: %"PRIu32", should not
> be
> > larger than %d\n",
> > +			dev->ifname, ctx->msg.payload.cfg.size,
> > +			VHOST_USER_MAX_CONFIG_SIZE);
> > +		goto out;
> > +	}
> > +
> > +	if (vdpa_dev->ops->set_config) {
> > +		ret = vdpa_dev->ops->set_config(dev->vid,
> > +			ctx->msg.payload.cfg.region,
> > +			ctx->msg.payload.cfg.offset,
> > +			ctx->msg.payload.cfg.size,
> > +			ctx->msg.payload.cfg.flags);
> > +		if (ret)
> > +			VHOST_LOG_CONFIG(ERR,
> > +					 "(%s) set_config() return error!\n",
> > +					 dev->ifname);
> > +	} else {
> > +		VHOST_LOG_CONFIG(ERR, "(%s) set_config() not
> supported!\n",
> > +				 dev->ifname);
> > +	}
> > +
> > +	return RTE_VHOST_MSG_RESULT_OK;
> > +
> > +out:
> > +	return RTE_VHOST_MSG_RESULT_ERR;
> > +}
> 
> I missed one thing in previous reviews: vdpa_dev pointer needed to be
> checked (Not Null) in both set/get config.
> 
> Thanks,
> Chenbo
> 
> > +
> > +static int
> >  vhost_user_iotlb_msg(struct virtio_net **pdev,
> >  			struct vhu_msg_context *ctx,
> >  			int main_fd __rte_unused)
> > @@ -2686,6 +2757,8 @@ static int is_vring_iotlb(struct virtio_net
> > *dev,  VHOST_MESSAGE_HANDLER(VHOST_USER_NET_SET_MTU,
> > vhost_user_net_set_mtu,
> > false) \
> >  VHOST_MESSAGE_HANDLER(VHOST_USER_SET_SLAVE_REQ_FD,
> > vhost_user_set_req_fd,
> > true) \
> >  VHOST_MESSAGE_HANDLER(VHOST_USER_IOTLB_MSG,
> vhost_user_iotlb_msg,
> > false) \
> > +VHOST_MESSAGE_HANDLER(VHOST_USER_GET_CONFIG,
> vhost_user_get_config,
> > +false)
> > \
> > +VHOST_MESSAGE_HANDLER(VHOST_USER_SET_CONFIG,
> vhost_user_set_config,
> > +false)
> > \
> >  VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_ADVISE,
> > vhost_user_set_postcopy_advise, false) \
> > VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_LISTEN,
> > vhost_user_set_postcopy_listen, false) \
> > VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_END,
> > vhost_user_postcopy_end,
> > false) \
> > diff --git a/lib/vhost/vhost_user.h b/lib/vhost/vhost_user.h index
> > ba1c5c7..c4d091e 100644
> > --- a/lib/vhost/vhost_user.h
> > +++ b/lib/vhost/vhost_user.h
> > @@ -50,6 +50,8 @@
> >  	VHOST_USER_NET_SET_MTU = 20,
> >  	VHOST_USER_SET_SLAVE_REQ_FD = 21,
> >  	VHOST_USER_IOTLB_MSG = 22,
> > +	VHOST_USER_GET_CONFIG = 24,
> > +	VHOST_USER_SET_CONFIG = 25,
> >  	VHOST_USER_CRYPTO_CREATE_SESS = 26,
> >  	VHOST_USER_CRYPTO_CLOSE_SESS = 27,
> >  	VHOST_USER_POSTCOPY_ADVISE = 28,
> > @@ -123,6 +125,16 @@
> >  	uint16_t queue_size;
> >  } VhostUserInflight;
> >
> > +#define VHOST_USER_MAX_CONFIG_SIZE		256
> > +
> > +/** Get/set config msg payload */
> > +struct vhost_user_config {
> > +	uint32_t offset;
> > +	uint32_t size;
> > +	uint32_t flags;
> > +	uint8_t region[VHOST_USER_MAX_CONFIG_SIZE];
> > +};
> > +
> >  typedef struct VhostUserMsg {
> >  	union {
> >  		uint32_t master; /* a VhostUserRequest value */ @@ -146,6
> +158,7 @@
> >  		VhostUserCryptoSessionParam crypto_session;
> >  		VhostUserVringArea area;
> >  		VhostUserInflight inflight;
> > +		struct vhost_user_config cfg;
> >  	} payload;
> >  	/* Nothing should be added after the payload */  } __rte_packed
> > VhostUserMsg;
> > --
> > 1.8.3.1

diff mbox series

Patch

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 850848c..1dd1e25f 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -2468,6 +2468,77 @@  static int is_vring_iotlb(struct virtio_net *dev,
 }
 
 static int
+vhost_user_get_config(struct virtio_net **pdev,
+			struct vhu_msg_context *ctx,
+			int main_fd __rte_unused)
+{
+	struct virtio_net *dev = *pdev;
+	struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
+	int ret = 0;
+
+	if (validate_msg_fds(dev, ctx, 0) != 0)
+		return RTE_VHOST_MSG_RESULT_ERR;
+
+	if (vdpa_dev->ops->get_config) {
+		ret = vdpa_dev->ops->get_config(dev->vid,
+					   ctx->msg.payload.cfg.region,
+					   ctx->msg.payload.cfg.size);
+		if (ret != 0) {
+			ctx->msg.size = 0;
+			VHOST_LOG_CONFIG(ERR,
+					 "(%s) get_config() return error!\n",
+					 dev->ifname);
+		}
+	} else {
+		VHOST_LOG_CONFIG(ERR, "(%s) get_config() not supported!\n",
+				 dev->ifname);
+	}
+
+	return RTE_VHOST_MSG_RESULT_REPLY;
+}
+
+static int
+vhost_user_set_config(struct virtio_net **pdev,
+			struct vhu_msg_context *ctx,
+			int main_fd __rte_unused)
+{
+	struct virtio_net *dev = *pdev;
+	struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
+	int ret = 0;
+
+	if (validate_msg_fds(dev, ctx, 0) != 0)
+		return RTE_VHOST_MSG_RESULT_ERR;
+
+	if (ctx->msg.payload.cfg.size > VHOST_USER_MAX_CONFIG_SIZE) {
+		VHOST_LOG_CONFIG(ERR,
+			"(%s) vhost_user_config size: %"PRIu32", should not be larger than %d\n",
+			dev->ifname, ctx->msg.payload.cfg.size,
+			VHOST_USER_MAX_CONFIG_SIZE);
+		goto out;
+	}
+
+	if (vdpa_dev->ops->set_config) {
+		ret = vdpa_dev->ops->set_config(dev->vid,
+			ctx->msg.payload.cfg.region,
+			ctx->msg.payload.cfg.offset,
+			ctx->msg.payload.cfg.size,
+			ctx->msg.payload.cfg.flags);
+		if (ret)
+			VHOST_LOG_CONFIG(ERR,
+					 "(%s) set_config() return error!\n",
+					 dev->ifname);
+	} else {
+		VHOST_LOG_CONFIG(ERR, "(%s) set_config() not supported!\n",
+				 dev->ifname);
+	}
+
+	return RTE_VHOST_MSG_RESULT_OK;
+
+out:
+	return RTE_VHOST_MSG_RESULT_ERR;
+}
+
+static int
 vhost_user_iotlb_msg(struct virtio_net **pdev,
 			struct vhu_msg_context *ctx,
 			int main_fd __rte_unused)
@@ -2686,6 +2757,8 @@  static int is_vring_iotlb(struct virtio_net *dev,
 VHOST_MESSAGE_HANDLER(VHOST_USER_NET_SET_MTU, vhost_user_net_set_mtu, false) \
 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_SLAVE_REQ_FD, vhost_user_set_req_fd, true) \
 VHOST_MESSAGE_HANDLER(VHOST_USER_IOTLB_MSG, vhost_user_iotlb_msg, false) \
+VHOST_MESSAGE_HANDLER(VHOST_USER_GET_CONFIG, vhost_user_get_config, false) \
+VHOST_MESSAGE_HANDLER(VHOST_USER_SET_CONFIG, vhost_user_set_config, false) \
 VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_ADVISE, vhost_user_set_postcopy_advise, false) \
 VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_LISTEN, vhost_user_set_postcopy_listen, false) \
 VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_END, vhost_user_postcopy_end, false) \
diff --git a/lib/vhost/vhost_user.h b/lib/vhost/vhost_user.h
index ba1c5c7..c4d091e 100644
--- a/lib/vhost/vhost_user.h
+++ b/lib/vhost/vhost_user.h
@@ -50,6 +50,8 @@ 
 	VHOST_USER_NET_SET_MTU = 20,
 	VHOST_USER_SET_SLAVE_REQ_FD = 21,
 	VHOST_USER_IOTLB_MSG = 22,
+	VHOST_USER_GET_CONFIG = 24,
+	VHOST_USER_SET_CONFIG = 25,
 	VHOST_USER_CRYPTO_CREATE_SESS = 26,
 	VHOST_USER_CRYPTO_CLOSE_SESS = 27,
 	VHOST_USER_POSTCOPY_ADVISE = 28,
@@ -123,6 +125,16 @@ 
 	uint16_t queue_size;
 } VhostUserInflight;
 
+#define VHOST_USER_MAX_CONFIG_SIZE		256
+
+/** Get/set config msg payload */
+struct vhost_user_config {
+	uint32_t offset;
+	uint32_t size;
+	uint32_t flags;
+	uint8_t region[VHOST_USER_MAX_CONFIG_SIZE];
+};
+
 typedef struct VhostUserMsg {
 	union {
 		uint32_t master; /* a VhostUserRequest value */
@@ -146,6 +158,7 @@ 
 		VhostUserCryptoSessionParam crypto_session;
 		VhostUserVringArea area;
 		VhostUserInflight inflight;
+		struct vhost_user_config cfg;
 	} payload;
 	/* Nothing should be added after the payload */
 } __rte_packed VhostUserMsg;