diff mbox series

[v3,1/2] net/virtio: add vhost-user protocol features support

Message ID 20200702074332.1211465-2-amorenoz@redhat.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers
Series net/virtio: add vhost-user protocol features support |

Checks

Context Check Description
ci/checkpatch warning coding style issues
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS
ci/Intel-compilation success Compilation OK
ci/iol-testing success Testing PASS

Commit Message

Adrian Moreno July 2, 2020, 7:43 a.m. UTC 
  From: Maxime Coquelin <maxime.coquelin@redhat.com>

This patch adds support for Vhost-user protocol features.
It is required to support protocol features that were not in
initial Vhost-user specification, such as reply-ack, MTU...

Also, this patch prevents Virtio multiqueue feature negotiation
if the slave does not support MQ protocol feature as stated
in Vhost-user specification:
"The multiple queues feature is supported only when the protocol
feature ``VHOST_USER_PROTOCOL_F_MQ`` (bit 0) is set."

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 drivers/net/virtio/virtio_user/vhost.h        |  9 +++++
 drivers/net/virtio/virtio_user/vhost_user.c   |  5 +++
 .../net/virtio/virtio_user/virtio_user_dev.c  | 39 ++++++++++++++++++-
 .../net/virtio/virtio_user/virtio_user_dev.h  |  3 ++
 drivers/net/virtio/virtio_user_ethdev.c       | 19 +++++++++
 5 files changed, 73 insertions(+), 2 deletions(-)

Comments

Chenbo Xia July 3, 2020, 8:40 a.m. UTC | #1 
Hi Adrian,

> -----Original Message-----
> From: Adrian Moreno <amorenoz@redhat.com>
> Sent: Thursday, July 2, 2020 3:44 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo.xia@intel.com>; Wang, Zhihong
> <zhihong.wang@intel.com>; Wang, Xiao W <xiao.w.wang@intel.com>; Yigit,
> Ferruh <ferruh.yigit@intel.com>; maxime.coquelin@redhat.com
> Subject: [PATCH v3 1/2] net/virtio: add vhost-user protocol features support
> 
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> 
> This patch adds support for Vhost-user protocol features.
> It is required to support protocol features that were not in
> initial Vhost-user specification, such as reply-ack, MTU...
> 
> Also, this patch prevents Virtio multiqueue feature negotiation
> if the slave does not support MQ protocol feature as stated
> in Vhost-user specification:
> "The multiple queues feature is supported only when the protocol
> feature ``VHOST_USER_PROTOCOL_F_MQ`` (bit 0) is set."
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  drivers/net/virtio/virtio_user/vhost.h        |  9 +++++
>  drivers/net/virtio/virtio_user/vhost_user.c   |  5 +++
>  .../net/virtio/virtio_user/virtio_user_dev.c  | 39 ++++++++++++++++++-
>  .../net/virtio/virtio_user/virtio_user_dev.h  |  3 ++
>  drivers/net/virtio/virtio_user_ethdev.c       | 19 +++++++++
>  5 files changed, 73 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/virtio/virtio_user/vhost.h
> b/drivers/net/virtio/virtio_user/vhost.h
> index 1e784e58e..9ace1a90c 100644
> --- a/drivers/net/virtio/virtio_user/vhost.h
> +++ b/drivers/net/virtio/virtio_user/vhost.h
> @@ -44,6 +44,15 @@ struct vhost_vring_addr {
>  	uint64_t log_guest_addr;
>  };

[snip]

> @@ -446,6 +455,10 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
> *path, int queues,
>  		return -1;
>  	}
> 
> +	if (!is_vhost_user_by_type(dev->path))
> +		dev->unsupported_features |=
> +			(1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
> +
>  	if (!dev->is_server) {
>  		if (dev->ops->send_request(dev, VHOST_USER_SET_OWNER,
>  					   NULL) < 0) {
> @@ -460,6 +473,26 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
> *path, int queues,
>  				     strerror(errno));
>  			return -1;
>  		}
> +
> +
> +		if (dev->device_features &
> +				(1ULL <<
> VHOST_USER_F_PROTOCOL_FEATURES)) {
> +			if (dev->ops->send_request(dev,
> +
> 	VHOST_USER_GET_PROTOCOL_FEATURES,
> +					&protocol_features))
> +				return -1;
> +
> +			dev->protocol_features &= protocol_features;
> +
> +			if (dev->ops->send_request(dev,
> +
> 	VHOST_USER_SET_PROTOCOL_FEATURES,
> +						&dev->protocol_features))
> +				return -1;
> +
> +			if (!(dev->protocol_features &
> +						(1ULL <<
> VHOST_USER_PROTOCOL_F_MQ)))
> +				dev->unsupported_features |= (1ull <<
> VIRTIO_NET_F_MQ);
> +		}
>  	} else {
>  		/* We just pretend vhost-user can support all these features.
>  		 * Note that this could be problematic that if some feature is
> @@ -469,6 +502,8 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
> *path, int queues,
>  		dev->device_features = VIRTIO_USER_SUPPORTED_FEATURES;
>  	}
> 
> +
> +
>  	if (!mrg_rxbuf)
>  		dev->unsupported_features |= (1ull <<
> VIRTIO_NET_F_MRG_RXBUF);
> 
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> index 3b6b6065a..56e638f8a 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> @@ -40,6 +40,9 @@ struct virtio_user_dev {
>  	uint64_t	device_features; /* supported features by device */
>  	uint64_t	frontend_features; /* enabled frontend features */
>  	uint64_t	unsupported_features; /* unsupported features mask
> */
> +	uint64_t	protocol_features; /* negotiated protocol features
> +					    * (Vhost-user only)
> +					    */
>  	uint8_t		status;
>  	uint16_t	port_id;
>  	uint8_t		mac_addr[RTE_ETHER_ADDR_LEN];
> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
> b/drivers/net/virtio/virtio_user_ethdev.c
> index 798f191c3..ccb5a18e2 100644
> --- a/drivers/net/virtio/virtio_user_ethdev.c
> +++ b/drivers/net/virtio/virtio_user_ethdev.c
> @@ -68,6 +68,7 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
>  	int connectfd;
>  	struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
>  	struct virtio_hw *hw = eth_dev->data->dev_private;
> +	uint64_t protocol_features;
> 
>  	connectfd = accept(dev->listenfd, NULL, NULL);
>  	if (connectfd < 0)
> @@ -81,6 +82,24 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
>  		return -1;
>  	}
> 
> +	if (dev->device_features &
> +			(1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) {
> +		if (dev->ops->send_request(dev,
> +
> 	VHOST_USER_GET_PROTOCOL_FEATURES,
> +					&protocol_features))
> +			return -1;
> +
> +		dev->protocol_features &= protocol_features;
> +
> +		if (dev->ops->send_request(dev,
> +
> 	VHOST_USER_SET_PROTOCOL_FEATURES,
> +					&dev->protocol_features))
> +			return -1;
> +	}
> +
> +	if (!(dev->protocol_features & (1ULL <<
> VHOST_USER_PROTOCOL_F_MQ)))
> +		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
> +

Should this 'if' be put into above '{}' ? This should be under the condition that
VHOST_USER_F_PROTOCOL_FEATURES is supported, right?  Like the code
change in 'virtio_user_dev_init'.

Thanks,
Chenbo

>  	dev->device_features |= dev->frontend_features;
> 
>  	/* umask vhost-user unsupported features */
> --
> 2.26.2
Adrian Moreno July 3, 2020, 3:52 p.m. UTC | #2 
On 7/3/20 10:40 AM, Xia, Chenbo wrote:
> Hi Adrian,
> 
>> -----Original Message-----
>> From: Adrian Moreno <amorenoz@redhat.com>
>> Sent: Thursday, July 2, 2020 3:44 PM
>> To: dev@dpdk.org
>> Cc: Xia, Chenbo <chenbo.xia@intel.com>; Wang, Zhihong
>> <zhihong.wang@intel.com>; Wang, Xiao W <xiao.w.wang@intel.com>; Yigit,
>> Ferruh <ferruh.yigit@intel.com>; maxime.coquelin@redhat.com
>> Subject: [PATCH v3 1/2] net/virtio: add vhost-user protocol features support
>>
>> From: Maxime Coquelin <maxime.coquelin@redhat.com>
>>
>> This patch adds support for Vhost-user protocol features.
>> It is required to support protocol features that were not in
>> initial Vhost-user specification, such as reply-ack, MTU...
>>
>> Also, this patch prevents Virtio multiqueue feature negotiation
>> if the slave does not support MQ protocol feature as stated
>> in Vhost-user specification:
>> "The multiple queues feature is supported only when the protocol
>> feature ``VHOST_USER_PROTOCOL_F_MQ`` (bit 0) is set."
>>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>> ---
>>  drivers/net/virtio/virtio_user/vhost.h        |  9 +++++
>>  drivers/net/virtio/virtio_user/vhost_user.c   |  5 +++
>>  .../net/virtio/virtio_user/virtio_user_dev.c  | 39 ++++++++++++++++++-
>>  .../net/virtio/virtio_user/virtio_user_dev.h  |  3 ++
>>  drivers/net/virtio/virtio_user_ethdev.c       | 19 +++++++++
>>  5 files changed, 73 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/virtio/virtio_user/vhost.h
>> b/drivers/net/virtio/virtio_user/vhost.h
>> index 1e784e58e..9ace1a90c 100644
>> --- a/drivers/net/virtio/virtio_user/vhost.h
>> +++ b/drivers/net/virtio/virtio_user/vhost.h
>> @@ -44,6 +44,15 @@ struct vhost_vring_addr {
>>  	uint64_t log_guest_addr;
>>  };
> 
> [snip]
> 
>> @@ -446,6 +455,10 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
>> *path, int queues,
>>  		return -1;
>>  	}
>>
>> +	if (!is_vhost_user_by_type(dev->path))
>> +		dev->unsupported_features |=
>> +			(1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
>> +
>>  	if (!dev->is_server) {
>>  		if (dev->ops->send_request(dev, VHOST_USER_SET_OWNER,
>>  					   NULL) < 0) {
>> @@ -460,6 +473,26 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
>> *path, int queues,
>>  				     strerror(errno));
>>  			return -1;
>>  		}
>> +
>> +
>> +		if (dev->device_features &
>> +				(1ULL <<
>> VHOST_USER_F_PROTOCOL_FEATURES)) {
>> +			if (dev->ops->send_request(dev,
>> +
>> 	VHOST_USER_GET_PROTOCOL_FEATURES,
>> +					&protocol_features))
>> +				return -1;
>> +
>> +			dev->protocol_features &= protocol_features;
>> +
>> +			if (dev->ops->send_request(dev,
>> +
>> 	VHOST_USER_SET_PROTOCOL_FEATURES,
>> +						&dev->protocol_features))
>> +				return -1;
>> +
>> +			if (!(dev->protocol_features &
>> +						(1ULL <<
>> VHOST_USER_PROTOCOL_F_MQ)))
>> +				dev->unsupported_features |= (1ull <<
>> VIRTIO_NET_F_MQ);
>> +		}
>>  	} else {
>>  		/* We just pretend vhost-user can support all these features.
>>  		 * Note that this could be problematic that if some feature is
>> @@ -469,6 +502,8 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
>> *path, int queues,
>>  		dev->device_features = VIRTIO_USER_SUPPORTED_FEATURES;
>>  	}
>>
>> +
>> +
>>  	if (!mrg_rxbuf)
>>  		dev->unsupported_features |= (1ull <<
>> VIRTIO_NET_F_MRG_RXBUF);
>>
>> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h
>> b/drivers/net/virtio/virtio_user/virtio_user_dev.h
>> index 3b6b6065a..56e638f8a 100644
>> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
>> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
>> @@ -40,6 +40,9 @@ struct virtio_user_dev {
>>  	uint64_t	device_features; /* supported features by device */
>>  	uint64_t	frontend_features; /* enabled frontend features */
>>  	uint64_t	unsupported_features; /* unsupported features mask
>> */
>> +	uint64_t	protocol_features; /* negotiated protocol features
>> +					    * (Vhost-user only)
>> +					    */
>>  	uint8_t		status;
>>  	uint16_t	port_id;
>>  	uint8_t		mac_addr[RTE_ETHER_ADDR_LEN];
>> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
>> b/drivers/net/virtio/virtio_user_ethdev.c
>> index 798f191c3..ccb5a18e2 100644
>> --- a/drivers/net/virtio/virtio_user_ethdev.c
>> +++ b/drivers/net/virtio/virtio_user_ethdev.c
>> @@ -68,6 +68,7 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
>>  	int connectfd;
>>  	struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
>>  	struct virtio_hw *hw = eth_dev->data->dev_private;
>> +	uint64_t protocol_features;
>>
>>  	connectfd = accept(dev->listenfd, NULL, NULL);
>>  	if (connectfd < 0)
>> @@ -81,6 +82,24 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
>>  		return -1;
>>  	}
>>
>> +	if (dev->device_features &
>> +			(1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) {
>> +		if (dev->ops->send_request(dev,
>> +
>> 	VHOST_USER_GET_PROTOCOL_FEATURES,
>> +					&protocol_features))
>> +			return -1;
>> +
>> +		dev->protocol_features &= protocol_features;
>> +
>> +		if (dev->ops->send_request(dev,
>> +
>> 	VHOST_USER_SET_PROTOCOL_FEATURES,
>> +					&dev->protocol_features))
>> +			return -1;
>> +	}
>> +
>> +	if (!(dev->protocol_features & (1ULL <<
>> VHOST_USER_PROTOCOL_F_MQ)))
>> +		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
>> +
> 
> Should this 'if' be put into above '{}' ? This should be under the condition that
> VHOST_USER_F_PROTOCOL_FEATURES is supported, right?  Like the code
> change in 'virtio_user_dev_init'.
> 
You're right. I'll re-send
Thanks


> Thanks,
> Chenbo
> 
>>  	dev->device_features |= dev->frontend_features;
>>
>>  	/* umask vhost-user unsupported features */
>> --
>> 2.26.2
>
diff mbox series

Patch

diff --git a/drivers/net/virtio/virtio_user/vhost.h b/drivers/net/virtio/virtio_user/vhost.h
index 1e784e58e..9ace1a90c 100644
--- a/drivers/net/virtio/virtio_user/vhost.h
+++ b/drivers/net/virtio/virtio_user/vhost.h
@@ -44,6 +44,15 @@  struct vhost_vring_addr {
 	uint64_t log_guest_addr;
 };
 
+#ifndef VHOST_USER_F_PROTOCOL_FEATURES
+#define VHOST_USER_F_PROTOCOL_FEATURES 30
+#endif
+
+/** Protocol features. */
+#ifndef VHOST_USER_PROTOCOL_F_MQ
+#define VHOST_USER_PROTOCOL_F_MQ	0
+#endif
+
 enum vhost_user_request {
 	VHOST_USER_NONE = 0,
 	VHOST_USER_GET_FEATURES = 1,
diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index 74b82e56e..c35c11fe5 100644
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -241,6 +241,8 @@  const char * const vhost_msg_strings[] = {
 	[VHOST_USER_SET_VRING_KICK] = "VHOST_SET_VRING_KICK",
 	[VHOST_USER_SET_MEM_TABLE] = "VHOST_SET_MEM_TABLE",
 	[VHOST_USER_SET_VRING_ENABLE] = "VHOST_SET_VRING_ENABLE",
+	[VHOST_USER_GET_PROTOCOL_FEATURES ] = "VHOST_USER_GET_PROTOCOL_FEATURES",
+	[VHOST_USER_SET_PROTOCOL_FEATURES ] = "VHOST_USER_SET_PROTOCOL_FEATURES",
 };
 
 static int
@@ -269,10 +271,12 @@  vhost_user_sock(struct virtio_user_dev *dev,
 
 	switch (req) {
 	case VHOST_USER_GET_FEATURES:
+	case VHOST_USER_GET_PROTOCOL_FEATURES:
 		need_reply = 1;
 		break;
 
 	case VHOST_USER_SET_FEATURES:
+	case VHOST_USER_SET_PROTOCOL_FEATURES:
 	case VHOST_USER_SET_LOG_BASE:
 		msg.payload.u64 = *((__u64 *)arg);
 		msg.size = sizeof(m.payload.u64);
@@ -351,6 +355,7 @@  vhost_user_sock(struct virtio_user_dev *dev,
 
 		switch (req) {
 		case VHOST_USER_GET_FEATURES:
+		case VHOST_USER_GET_PROTOCOL_FEATURES:
 			if (msg.size != sizeof(m.payload.u64)) {
 				PMD_DRV_LOG(ERR, "Received bad msg size");
 				return -1;
diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index 7fb135f49..e45159ddd 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -151,8 +151,10 @@  virtio_user_start_device(struct virtio_user_dev *dev)
 	if (virtio_user_queue_setup(dev, virtio_user_create_queue) < 0)
 		goto error;
 
-	/* Step 1: set features */
+	/* Step 1: negotiate protocol features & set features */
 	features = dev->features;
+
+
 	/* Strip VIRTIO_NET_F_MAC, as MAC address is handled in vdev init */
 	features &= ~(1ull << VIRTIO_NET_F_MAC);
 	/* Strip VIRTIO_NET_F_CTRL_VQ, as devices do not really need to know */
@@ -417,13 +419,19 @@  virtio_user_dev_setup(struct virtio_user_dev *dev)
 	 1ULL << VIRTIO_NET_F_GUEST_TSO6	|	\
 	 1ULL << VIRTIO_F_IN_ORDER		|	\
 	 1ULL << VIRTIO_F_VERSION_1		|	\
-	 1ULL << VIRTIO_F_RING_PACKED)
+	 1ULL << VIRTIO_F_RING_PACKED		|	\
+	 1ULL << VHOST_USER_F_PROTOCOL_FEATURES)
+
+#define VIRTIO_USER_SUPPORTED_PROTOCOL_FEATURES		\
+	(1ULL << VHOST_USER_PROTOCOL_F_MQ)
 
 int
 virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 		     int cq, int queue_size, const char *mac, char **ifname,
 		     int server, int mrg_rxbuf, int in_order, int packed_vq)
 {
+	uint64_t protocol_features = 0;
+
 	pthread_mutex_init(&dev->mutex, NULL);
 	strlcpy(dev->path, path, PATH_MAX);
 	dev->started = 0;
@@ -434,6 +442,7 @@  virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 	dev->mac_specified = 0;
 	dev->frontend_features = 0;
 	dev->unsupported_features = ~VIRTIO_USER_SUPPORTED_FEATURES;
+	dev->protocol_features = VIRTIO_USER_SUPPORTED_PROTOCOL_FEATURES;
 	parse_mac(dev, mac);
 
 	if (*ifname) {
@@ -446,6 +455,10 @@  virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 		return -1;
 	}
 
+	if (!is_vhost_user_by_type(dev->path))
+		dev->unsupported_features |=
+			(1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
+
 	if (!dev->is_server) {
 		if (dev->ops->send_request(dev, VHOST_USER_SET_OWNER,
 					   NULL) < 0) {
@@ -460,6 +473,26 @@  virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 				     strerror(errno));
 			return -1;
 		}
+
+
+		if (dev->device_features &
+				(1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) {
+			if (dev->ops->send_request(dev,
+					VHOST_USER_GET_PROTOCOL_FEATURES,
+					&protocol_features))
+				return -1;
+
+			dev->protocol_features &= protocol_features;
+
+			if (dev->ops->send_request(dev,
+						VHOST_USER_SET_PROTOCOL_FEATURES,
+						&dev->protocol_features))
+				return -1;
+
+			if (!(dev->protocol_features &
+						(1ULL << VHOST_USER_PROTOCOL_F_MQ)))
+				dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
+		}
 	} else {
 		/* We just pretend vhost-user can support all these features.
 		 * Note that this could be problematic that if some feature is
@@ -469,6 +502,8 @@  virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 		dev->device_features = VIRTIO_USER_SUPPORTED_FEATURES;
 	}
 
+
+
 	if (!mrg_rxbuf)
 		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MRG_RXBUF);
 
diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h b/drivers/net/virtio/virtio_user/virtio_user_dev.h
index 3b6b6065a..56e638f8a 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
@@ -40,6 +40,9 @@  struct virtio_user_dev {
 	uint64_t	device_features; /* supported features by device */
 	uint64_t	frontend_features; /* enabled frontend features */
 	uint64_t	unsupported_features; /* unsupported features mask */
+	uint64_t	protocol_features; /* negotiated protocol features
+					    * (Vhost-user only)
+					    */
 	uint8_t		status;
 	uint16_t	port_id;
 	uint8_t		mac_addr[RTE_ETHER_ADDR_LEN];
diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index 798f191c3..ccb5a18e2 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -68,6 +68,7 @@  virtio_user_server_reconnect(struct virtio_user_dev *dev)
 	int connectfd;
 	struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
 	struct virtio_hw *hw = eth_dev->data->dev_private;
+	uint64_t protocol_features;
 
 	connectfd = accept(dev->listenfd, NULL, NULL);
 	if (connectfd < 0)
@@ -81,6 +82,24 @@  virtio_user_server_reconnect(struct virtio_user_dev *dev)
 		return -1;
 	}
 
+	if (dev->device_features &
+			(1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) {
+		if (dev->ops->send_request(dev,
+					VHOST_USER_GET_PROTOCOL_FEATURES,
+					&protocol_features))
+			return -1;
+
+		dev->protocol_features &= protocol_features;
+
+		if (dev->ops->send_request(dev,
+					VHOST_USER_SET_PROTOCOL_FEATURES,
+					&dev->protocol_features))
+			return -1;
+	}
+
+	if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)))
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
+
 	dev->device_features |= dev->frontend_features;
 
 	/* umask vhost-user unsupported features */